CN113218046A - Method for controlling compressor frequency, air conditioner and computer storage medium - Google Patents
Method for controlling compressor frequency, air conditioner and computer storage medium Download PDFInfo
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- CN113218046A CN113218046A CN202110513011.XA CN202110513011A CN113218046A CN 113218046 A CN113218046 A CN 113218046A CN 202110513011 A CN202110513011 A CN 202110513011A CN 113218046 A CN113218046 A CN 113218046A
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- 238000005265 energy consumption Methods 0.000 abstract description 11
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The invention discloses a method for controlling the frequency of a compressor, an air conditioner and a computer storage medium, wherein the method for controlling the frequency of the compressor comprises the following steps: determining that the compressor is in a stable frequency change state; receiving a first compressor frequency adjusting instruction, wherein the first compressor frequency adjusting instruction is different from the compressor frequency adjusting instruction in the frequency stable change state; acquiring the indoor environment temperature; obtaining a second compressor frequency adjusting instruction according to the indoor environment temperature; and if the second compressor frequency adjusting instruction is determined to be inconsistent with the first compressor frequency adjusting instruction, controlling the compressor frequency according to the second compressor frequency adjusting instruction or the compressor frequency adjusting instruction in the frequency stable change state. The method can effectively identify the invalid compressor frequency adjusting instruction, improve the system operation stability and save energy consumption.
Description
Technical Field
The present invention relates to the field of air conditioner technology, and in particular, to a method for controlling the frequency of a compressor, an air conditioner, and a computer storage medium.
Background
In the related art, in the process of adjusting the frequency of the compressor, the air conditioner has a very short-time fluctuation of the return air temperature due to the non-uniformity of the indoor ambient temperature, and the air conditioner refers to the change of the return air temperature when adjusting the frequency of the compressor. The temperature change of the whole indoor environment cannot be represented due to the transient temperature fluctuation, but the air conditioner can operate the compressor to adjust the frequency according to the transient temperature fluctuation, and a control system of the air conditioner cannot recognize the interference of the transient temperature fluctuation, so that the frequency is increased or reduced for a short time due to the action of adjusting the frequency of the compressor by the transient temperature fluctuation, most of the frequency adjustment caused by the action is ineffective adjustment, the temperature adjustment process is influenced, the stability of the indoor environment temperature is influenced, the comfortable sensation is reduced, and the energy consumption is increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling a frequency of a compressor, which can effectively identify an invalid compressor frequency adjustment command, improve system operation stability, and save energy consumption.
The embodiment of the second aspect of the invention provides an air conditioner.
A third aspect of the present invention provides a computer storage medium.
In a fourth aspect, an embodiment of the invention provides an air conditioner.
In order to solve the above problem, a method for controlling a frequency of a compressor according to an embodiment of a first aspect of the present invention includes: determining that the compressor is in a stable frequency change state; receiving a first compressor frequency adjusting instruction, wherein the first compressor frequency adjusting instruction is different from the compressor frequency adjusting instruction in the frequency stable change state; acquiring the indoor environment temperature; obtaining a second compressor frequency adjusting instruction according to the indoor environment temperature; and if the second compressor frequency adjusting instruction is determined to be inconsistent with the first compressor frequency adjusting instruction, controlling the compressor frequency according to the second compressor frequency adjusting instruction or the compressor frequency adjusting instruction in the frequency stable change state.
According to the method for controlling the frequency of the compressor, when the compressor is in a stable frequency change state, when a first compressor frequency adjusting instruction different from a compressor frequency adjusting instruction in the stable frequency change state is received, the first compressor frequency adjusting instruction is not executed, but a second compressor frequency adjusting instruction is obtained according to the indoor environment temperature, whether the first compressor frequency adjusting instruction is effective or not is judged through the second compressor frequency adjusting instruction, if the two compressor frequency adjusting instructions are not consistent, the first compressor frequency adjusting instruction is an invalid instruction, so that the compressor frequency is controlled by the second compressor frequency adjusting instruction or the compressor frequency adjusting instruction in the stable frequency change state, the invalid compressor frequency adjusting instruction can be effectively identified, and the problem that the air conditioner adjusts the compressor frequency due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature is avoided, the operation stability of the system is improved, and energy consumption is saved.
In some embodiments, the method further comprises: and if the second compressor frequency adjusting instruction is consistent with the first compressor frequency adjusting instruction, controlling the compressor frequency according to the second compressor frequency adjusting instruction.
In some embodiments, determining that the compressor is in a frequency stable variation state comprises: acquiring return air temperature and target indoor environment temperature; determining the current operation condition of the air conditioner; receiving a compressor frequency adjusting instruction for n times, wherein n is more than or equal to 2; and under the current operation working condition, determining that the indoor environment temperature is in a stable state according to the return air temperature, the target indoor environment temperature and a preset temperature difference threshold, determining that the n-time compressor frequency adjusting instructions are all frequency maintaining instructions, and determining that the compressor is in a stable frequency changing state.
In some embodiments, if it is determined that the second compressor frequency adjustment command is not consistent with the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command in the steady state frequency change state includes: if the first compressor frequency adjusting instruction is an up-frequency adjusting instruction and the second compressor frequency adjusting instruction is a down-frequency adjusting instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the compressor frequency according to the compressor frequency adjusting instruction in the frequency stable change state; or, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction and the second compressor frequency adjustment instruction is a frequency increase adjustment instruction, determining that the second compressor frequency adjustment instruction is inconsistent with the first compressor frequency adjustment instruction, and controlling the compressor frequency according to the compressor frequency adjustment instruction in the frequency stable change state.
In some embodiments, after determining that the second compressor frequency adjustment command is inconsistent with the first compressor frequency adjustment command, the method further comprises: acquiring the indoor environment temperature; obtaining a third compressor frequency adjusting instruction according to the indoor environment temperature; and controlling the frequency of the compressor according to the matching degree of the third compressor frequency adjusting instruction and the second compressor frequency adjusting instruction.
In some embodiments, if it is determined that the second compressor frequency adjustment command is not consistent with the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command in the frequency steady state change state, further comprises: if the first compressor frequency adjusting instruction is an ascending frequency adjusting instruction and the second compressor frequency adjusting instruction is a maintaining frequency instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the compressor frequency according to the second compressor frequency adjusting instruction; or, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction and the second compressor frequency adjustment instruction is a frequency maintenance instruction, determining that the second compressor frequency adjustment instruction is inconsistent with the first compressor frequency adjustment instruction, and controlling the compressor frequency according to the second compressor frequency adjustment instruction.
In some embodiments, determining that the second compressor frequency adjustment command is consistent with the first compressor frequency adjustment command comprises: if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction and the second compressor frequency adjustment instruction is an up-frequency adjustment instruction, determining that the second compressor frequency adjustment instruction is consistent with the first compressor frequency adjustment instruction; or, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction and the second compressor frequency adjustment instruction is a frequency reduction adjustment instruction, determining that the second compressor frequency adjustment instruction is consistent with the first compressor frequency adjustment instruction.
In some embodiments, determining that the compressor is in a frequency stable variation state comprises: receiving n times of compressor frequency adjusting instructions, determining that the n times of compressor frequency adjusting instructions are frequency raising adjusting instructions, and determining that the compressor is in a state of maintaining frequency raising stable change, wherein n is more than or equal to 2; or receiving the compressor frequency regulating instruction for m times, wherein the compressor frequency regulating instruction is a non-frequency reduction regulating instruction every time, and determining that the compressor is in a state of maintaining frequency increase stable change, wherein m is larger than or equal to n.
In some embodiments, if it is determined that the second compressor frequency adjustment command is not consistent with the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command in the steady state frequency change state includes: and if the first compressor frequency adjusting instruction is a frequency reduction adjusting instruction and the second compressor frequency adjusting instruction is a frequency reduction adjusting instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the frequency of the compressor according to the second compressor frequency adjusting instruction.
In some embodiments, determining that the second compressor frequency adjustment command is consistent with the first compressor frequency adjustment command comprises: and if the first compressor frequency adjusting instruction is a frequency reduction adjusting instruction and the second compressor frequency adjusting instruction is a frequency reduction adjusting instruction, determining that the second compressor frequency adjusting instruction is consistent with the first compressor frequency adjusting instruction.
In some embodiments, determining that the compressor is in a frequency stable variation state comprises: receiving n times of compressor frequency adjusting instructions which are frequency reduction adjusting instructions, and determining that the compressor is in a state of maintaining stable change of frequency reduction, wherein n is more than or equal to 2; or continuously acquiring p times of compressor frequency adjusting instructions, wherein the compressor frequency instructions are all non-frequency-increasing adjusting instructions every time, and determining that the compressor is in a state of maintaining the stable change of frequency reduction, wherein p is more than or equal to n.
In some embodiments, if it is determined that the second compressor frequency adjustment command is not consistent with the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command in the steady state frequency change state includes: and if the first compressor frequency adjusting instruction is an ascending frequency adjusting instruction and the second compressor frequency adjusting instruction is a non-ascending frequency adjusting instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the compressor frequency according to the second compressor frequency adjusting instruction.
In some embodiments, determining that the second compressor frequency adjustment command is consistent with the first compressor frequency adjustment command comprises: and if the first compressor frequency adjusting instruction is an ascending frequency adjusting instruction and the second compressor frequency adjusting instruction is an ascending frequency adjusting instruction, determining that the second compressor frequency adjusting instruction is consistent with the first compressor frequency adjusting instruction.
An embodiment of a second aspect of the present invention provides an air conditioner, including: at least one processor; a memory communicatively coupled to at least one of the processors; wherein, the memory stores a computer program executable by at least one processor, and the at least one processor implements the method for controlling the frequency of the compressor according to the above embodiment when executing the computer program.
According to the air conditioner provided by the embodiment of the invention, the processor adopts the method for controlling the frequency of the compressor provided by the embodiment, so that the invalid compressor frequency adjusting instruction can be effectively identified, the problem that the air conditioner adjusts the frequency of the compressor due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature is avoided, the operation stability of the system is improved, and the energy consumption is saved.
A third embodiment of the present invention provides a computer storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method for controlling the frequency of a compressor according to the above embodiments.
An embodiment of a fourth aspect of the present invention provides an air conditioner, including: a compressor; the first temperature sensor is used for collecting the indoor environment temperature; and the controller is respectively connected with the compressor and the first temperature sensor and is used for executing the method for controlling the frequency of the compressor in the embodiment.
According to the air conditioner provided by the embodiment of the invention, the controller executes the method for controlling the frequency of the compressor, so that an invalid compressor frequency adjusting instruction can be effectively identified, the problem that the air conditioner adjusts the frequency of the compressor due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature is avoided, the operation stability of a system is improved, and the energy consumption is saved.
In some embodiments, the air conditioner further comprises a second temperature sensor, the second temperature sensor is connected with the controller, and the second temperature sensor is used for collecting the return air temperature; the controller is further used for obtaining the return air temperature and receiving the n-time compressor frequency adjusting instructions, determining that the indoor environment temperature is in a stable state according to the return air temperature and a preset temperature threshold value, and determining that the compressor is in a stable frequency maintaining state when the n-time compressor frequency adjusting instructions are frequency maintaining instructions.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a method of controlling compressor frequency according to one embodiment of the present invention;
FIG. 2 is a flow chart of a method of controlling compressor frequency according to another embodiment of the present invention;
fig. 3 is a schematic structural view of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic structural view of an air conditioner according to another embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
The air conditioner performs functions such as refrigeration/heating circulation or dehumidification through the compressor, the condenser, the expansion valve and the evaporator, can realize the regulation of the indoor environment, and improves the comfort of the indoor environment. The refrigeration cycle includes a series of processes, for example, involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas, the discharged refrigerant gas flows into a condenser, the condenser condenses the compressed refrigerant into a liquid state, and heat is released to the surrounding environment through a condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
In order to solve the problem of frequency adjustment of the compressor caused by return air temperature fluctuation due to nonuniform indoor environment temperature, the embodiment of the first aspect of the invention provides a method for controlling the frequency of the compressor, which can effectively identify an invalid compressor frequency adjustment instruction, improve the operation stability of a system and save energy consumption.
As shown in fig. 1, the method for controlling the frequency of the compressor according to the embodiment of the present invention at least includes steps S1 to S5, and each step is as follows.
In step S1, it is determined that the compressor is in a frequency stable variation state.
The stable frequency variation state may be understood as that the variation of the operating frequency of the compressor keeps a stable state within a certain period of time, for example, the compressor operates stably at a fixed frequency, i.e., the compressor is in a stable frequency variation maintaining state, or the compressor operates stably in a continuous frequency-reducing state, i.e., the compressor is in a stable frequency-reducing variation maintaining state, or the compressor operates stably in a continuous frequency-increasing state, i.e., the compressor is in a stable frequency-increasing variation maintaining state.
In an embodiment, whether the compressor is in a stable frequency change state or not can be judged by the controller of the air conditioner according to the continuously received compressor frequency adjustment instructions, and if the continuously received compressor frequency adjustment instructions are all consistent, the compressor is in the stable frequency change state.
Further, when the compressor is in a stable frequency variation state, due to the invalid compressor frequency adjustment instruction generated by misjudgment, in order to avoid the problem of unstable compressor frequency caused by executing the invalid compressor frequency adjustment instruction, an abnormal frequency adjustment instruction different from the compressor frequency adjustment instruction in the stable frequency variation state needs to be identified, so as to improve the operation stability of the air conditioner.
Step S2, receiving a first compressor frequency adjustment instruction, where the first compressor frequency adjustment instruction is different from the compressor frequency adjustment instruction in the frequency stable variation state.
In the embodiment, when the compressor is in a stable frequency change state and an abnormal frequency adjusting instruction different from the compressor frequency adjusting instruction in the stable frequency change state is received for the first time, the abnormal frequency adjusting instruction is used as a first compressor frequency adjusting instruction, since the controller cannot determine whether the command is a command required in adjusting the indoor ambient temperature, that is, cannot recognize whether the command is a valid command, therefore, after receiving the first compressor frequency adjustment command, the controller preliminarily determines the command as an invalid command in order to avoid affecting the stability of the indoor temperature, i.e., the first compressor frequency adjustment instruction is not executed, but the compressor frequency adjustment instruction at the time of frequency stable variation state is maintained, and by executing the following steps S3-S5, the command is further determined to determine whether to adjust the compressor frequency according to the determination result.
For example, when the compressor is in a state of maintaining a steady frequency change, the compressor frequency adjustment command may be identified as Δ h being 0, that is, the frequency increment is 0, and the compressor operating frequency remains unchanged. If the compressor frequency adjustment command Δ h received at a certain time is not equal to 0, i.e. the command is different from the compressor frequency adjustment command when the frequency stable variation state is maintained, the command is taken as the first compressor frequency adjustment command. Or, when the compressor is in the state of maintaining the stable change of frequency reduction, the frequency adjustment instruction of the compressor can be marked as Δ h <0 when the state of maintaining the stable change of frequency reduction, that is, the frequency increment is negative, and the running frequency of the compressor is always frequency reduction. If the received compressor frequency adjusting instruction delta h is not less than 0 at a certain moment, namely the instruction is different from the compressor frequency adjusting instruction when the stable frequency changing state is maintained, the instruction is used as a first compressor frequency adjusting instruction. Or when the compressor is in the state of maintaining the frequency-increasing stable variation, the frequency adjusting instruction of the compressor can be marked as delta h >0 when the state of maintaining the frequency-increasing stable variation, namely the frequency increment is positive, and the running frequency of the compressor is always the frequency increase. If the compressor frequency adjusting instruction delta h received at a certain moment is less than or equal to 0, namely the instruction is different from the compressor frequency adjusting instruction when the frequency stable change state is maintained, the instruction is used as a first compressor frequency adjusting instruction.
In step S3, the indoor ambient temperature is acquired.
In an embodiment, a temperature sensor may be disposed at a suitable position of the indoor unit of the air conditioner to collect the indoor ambient temperature in real time. The temperature sensor transmits the collected data to a controller such as an indoor unit controller or an outdoor unit controller or an independently set controller. The controller can acquire the indoor ambient temperature as required.
In an embodiment, the indoor ambient temperature may be collected at a preset time interval after receiving the first compressor frequency adjustment instruction. The preset time is recorded as k being smaller than or equal to the indoor environment temperature initial sampling interval set by the controller, and is recorded as Δ t. The initial sampling interval of the indoor environment temperature is the sampling interval of the indoor environment temperature value in the process of controlling the frequency adjustment of the compressor by the controller after the air conditioner is started.
It can be understood that the value of the preset time can be set as small as possible under the condition that the normal adjustment of the frequency of the compressor controlled by the controller is not influenced, so that the frequency adjusting instruction of the first compressor can be judged quickly, and the air conditioner can be kept in stable operation.
And step S4, obtaining a second compressor frequency adjusting instruction according to the indoor environment temperature.
In an embodiment, the indoor ambient temperature may represent a temperature change of the entire indoor environment, and the air conditioner adjusts the compressor frequency according to the indoor ambient temperature. Therefore, the controller can accurately know the temperature change in the whole indoor environment according to the indoor environment temperature, and judge whether the frequency of the compressor needs to be adjusted in the current process of adjusting the indoor environment temperature according to the indoor temperature change, namely, a second compressor frequency adjusting instruction is obtained.
For example, the air conditioner is used for controlling the indoor environment temperature to reach the user set temperature, in the process, the controller detects that the indoor environment temperature is in a real-time change state, but the operation frequency of the compressor is low, so that the temperature change speed is low, and in order to enable the indoor environment temperature to accurately reach the user set temperature, at the moment, the controller can control the operation frequency of the compressor to be increased according to the slow temperature change, namely, the frequency increasing adjustment instruction of the second compressor is obtained. Or, in the process, the controller detects that the indoor environment temperature is in a real-time change state, but the running frequency of the compressor is higher, so that the temperature change speed is higher, and in order to enable the indoor environment temperature to accurately reach the temperature set by the user, at the moment, the controller can control the running frequency of the compressor to be reduced according to the fast temperature change, namely, the frequency reduction regulation instruction of the second compressor is obtained. Or, in the process, the controller detects that the indoor environment temperature is in a real-time change state, the temperature change speed is stable, and at the moment, the controller can control the running frequency of the compressor to be kept unchanged, namely, the second compressor frequency adjusting instruction is obtained as a frequency maintaining instruction.
And step S5, if the second compressor frequency adjusting instruction is determined to be inconsistent with the first compressor frequency adjusting instruction, controlling the compressor frequency according to the second compressor frequency adjusting instruction or the compressor frequency adjusting instruction in the frequency stable change state.
In an embodiment, whether the first compressor frequency adjustment instruction is valid is judged through the second compressor frequency adjustment instruction, if the second compressor frequency adjustment instruction is determined to be inconsistent with the first compressor frequency adjustment instruction, the first compressor frequency adjustment instruction is an invalid instruction, and the compressor frequency is controlled according to the second compressor frequency adjustment instruction or the compressor frequency adjustment instruction in a frequency stable change state. In this way, in the process of adjusting the indoor environment temperature, the invalid compressor frequency adjusting instruction can be effectively identified, so that the problem that the compressor frequency is unstable due to the fact that the invalid compressor frequency adjusting instruction is executed is avoided, the problem that the air conditioner adjusts the compressor frequency due to the fact that the air return temperature is fluctuated due to the fact that the indoor environment temperature is non-uniform is also avoided, the stability of the indoor temperature is ensured, the operation stability of the system is improved, and energy consumption is saved.
According to the method for controlling the frequency of the compressor, when the compressor is in a stable frequency change state, when a first compressor frequency adjusting instruction different from a compressor frequency adjusting instruction in the stable frequency change state is received, the first compressor frequency adjusting instruction is not executed, but a second compressor frequency adjusting instruction is obtained according to the indoor environment temperature, whether the first compressor frequency adjusting instruction is effective or not is judged through the second compressor frequency adjusting instruction, if the two compressor frequency adjusting instructions are not consistent, the first compressor frequency adjusting instruction is an invalid instruction, so that the compressor frequency is controlled by the second compressor frequency adjusting instruction or the compressor frequency adjusting instruction in the stable frequency change state, the invalid compressor frequency adjusting instruction can be effectively identified, and the problem that the air conditioner adjusts the compressor frequency due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature is avoided, the operation stability of the system is improved, and energy consumption is saved.
In some embodiments, the method further includes, if it is determined that the second compressor frequency adjustment command is identical to the first compressor frequency adjustment command, indicating that the first compressor frequency adjustment command is a command required in adjusting the indoor ambient temperature, that is, the command is a valid command, so that the controller adjusts the compressor frequency according to the second compressor frequency adjustment command to change the indoor ambient temperature. Therefore, when the compressor is in a stable frequency change state and a first compressor frequency adjusting instruction different from the compressor frequency adjusting instruction in the stable frequency change state is received, a second compressor frequency adjusting instruction is obtained according to the indoor environment temperature in a short time, whether the first compressor frequency adjusting instruction is an effective instruction or not is judged quickly, and after the first compressor frequency adjusting instruction is determined to be the effective instruction, the controller can quickly react to send the second compressor frequency adjusting instruction to control the compressor frequency, so that the execution of the effective instruction in the process of adjusting the indoor environment temperature cannot be influenced, and the speed of adjusting the indoor environment temperature is ensured.
In some embodiments, by obtaining a return air temperature and a target indoor ambient temperature; determining the current operation condition of the air conditioner; receiving a compressor frequency adjusting instruction for n times, wherein n is more than or equal to 2; under the current operation condition, the indoor environment temperature is determined to be in a stable state according to the return air temperature, the target indoor environment temperature and the preset temperature difference threshold, and the compressor is determined to be in a stable frequency maintaining state if the frequency adjusting instructions of the compressor for n times are determined to be frequency maintaining instructions.
Wherein, a temperature sensor can be arranged at a proper position of an air inlet in the air conditioner so as to collect the return air temperature in real time. The temperature sensor sends the data of gathering to the controller, and the controller can acquire return air temperature as required. When the user starts the air conditioner, the user can manually select the required indoor environment temperature according to the actual requirement, namely the target indoor environment temperature, and the controller acquires the target indoor environment temperature; or when the user starts the air conditioner, the controller does not receive the target indoor environment temperature required by selection, at the moment, the controller selects the default target indoor environment temperature, and the default target indoor environment temperature is the target indoor environment temperature which is preset or recorded by the air conditioner last time.
In the embodiment, the air conditioner is configured with a refrigeration working condition and a heating working condition, and after the air conditioner is started, the current operation working condition of the air conditioner is judged to obtain the operation working condition. Specifically, the current operating condition of the air conditioner may be determined manually by a user, or may be a default operating condition when the air conditioner is turned on. For example, when the user starts the air conditioner, the user manually selects the required operation conditions, such as a refrigeration condition and a heating condition, according to the actual requirements; or, when the user starts the air conditioner, the user does not receive the operation condition required by the selection, at this time, the air conditioner selects the default operation condition, and the default operation condition is the preset or last operation condition recorded by the air conditioner, namely the default operation condition, such as a refrigeration condition or a heating condition, after the air conditioner is started.
For example, under the refrigeration condition of the air conditioner, assuming that the target indoor environment temperature, i.e., the user-set temperature, is T, the return air temperature obtained by the controller is T1, and the preset temperature difference threshold is T2, the controller calculates the temperature difference between the return air temperature and the target indoor environment temperature, if the temperature difference Δ T is determined to be greater than the preset temperature difference threshold T2, it is determined that the indoor environment temperature does not reach the user-set temperature, and the temperature is still in the temperature adjustment process, i.e., the temperature tends to be in a stable state. In this state, if the n times of compressor frequency adjustment commands received by the controller are all maintaining frequency commands, that is, Δ h is 0, it is determined that the compressor is in a state of maintaining stable frequency variation, that is, the compressor operating frequency remains unchanged.
Or, under the heating condition of the air conditioner, assuming that the target indoor environment temperature, namely the user-set temperature, is T, the return air temperature obtained by the controller is T1, the preset temperature difference threshold value is T3, the controller calculates the temperature difference between the return air temperature and the target indoor environment temperature, if the temperature difference value Δ T is determined to be smaller than the preset temperature difference threshold value T3, it is indicated that the indoor environment temperature does not reach the user-set temperature, and the temperature is still in the temperature adjustment process, namely, the temperature tends to be in a stable state. In this state, if the n times of compressor frequency adjustment commands received by the controller are all maintaining frequency commands, that is, Δ h is 0, it is determined that the compressor is in a state of maintaining stable frequency variation, that is, the compressor operating frequency remains unchanged.
In some embodiments, when the compressor is in a state of maintaining stable frequency variation, if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction and the second compressor frequency adjustment instruction is a down-frequency adjustment instruction, it is determined that the second compressor frequency adjustment instruction is inconsistent with the first compressor frequency adjustment instruction, and the controller controls the compressor frequency according to the compressor frequency adjustment instruction in the state of stable frequency variation; or if the first compressor frequency adjusting instruction is a frequency reduction adjusting instruction and the second compressor frequency adjusting instruction is a frequency increase adjusting instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the compressor frequency by the controller according to the compressor frequency adjusting instruction in the frequency stable change state.
In some embodiments, when the compressor is in the state of maintaining the stable frequency variation, it is determined that the second compressor frequency adjustment command is not consistent with the first compressor frequency adjustment command, and the second compressor frequency adjustment command is not consistent with the compressor frequency adjustment command in the state of maintaining the stable frequency variation, and there is a possibility that both the second compressor frequency adjustment command and the first compressor frequency adjustment command are invalid commands, so the controller may continue to determine the second compressor frequency adjustment command. Specifically, the indoor environment temperature is obtained, the third compressor frequency adjusting instruction is obtained according to the indoor environment temperature, whether the second compressor frequency adjusting instruction is an effective instruction or not is judged according to the matching degree of the third compressor frequency adjusting instruction and the second compressor frequency adjusting instruction, and therefore the compressor frequency is controlled according to the matching result.
For example, when the compressor is in a state of maintaining stable frequency variation, if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction, and is recorded as Δ h >0, the first compressor frequency adjustment instruction is preliminarily determined to be an invalid instruction, the first compressor frequency adjustment instruction is not executed, and the compressor frequency adjustment instruction is operated when the stable frequency variation state is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; and if the second compressor frequency adjusting instruction is determined to be the frequency reduction adjusting instruction according to the indoor environment temperature, if the frequency reduction adjusting instruction is recorded as delta h <0, the controller judges that the second compressor frequency adjusting instruction is also an invalid instruction, does not execute the instruction, maintains the operation of the compressor frequency adjusting instruction in the frequency stable change state, and detects the indoor environment temperature again at the preset time k seconds to carry out re-judgment. Or, when the compressor is in a state of maintaining stable frequency change, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction, and is recorded as delta h <0, the first compressor frequency adjustment instruction preliminarily judges that the instruction is an invalid instruction, does not execute the instruction, and operates the compressor frequency adjustment instruction when the stable frequency change state is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; and if the second compressor frequency adjusting instruction is determined to be the frequency increasing adjusting instruction according to the indoor environment temperature, if the frequency increasing adjusting instruction is recorded as delta h >0, the controller judges that the second compressor frequency adjusting instruction is also an invalid instruction, the instruction is not executed, the compressor frequency adjusting instruction operates when the frequency is maintained in a stable changing state, and the indoor environment temperature is detected again at the preset time k seconds to carry out re-judgment.
In some embodiments, when the compressor is in a state of maintaining stable frequency variation, if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction, and the second compressor frequency adjustment instruction is a maintaining frequency instruction, that is, the second compressor frequency adjustment instruction is consistent with the compressor frequency adjustment instruction in the state of stable frequency variation, it indicates that the first compressor frequency adjustment instruction is an instruction generated due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature, that is, an invalid instruction, so as to determine that the second compressor frequency adjustment instruction is inconsistent with the first compressor frequency adjustment instruction, and the controller controls the compressor frequency according to the second compressor frequency adjustment instruction; or if the first compressor frequency adjusting instruction is a frequency reduction adjusting instruction and the second compressor frequency adjusting instruction is a frequency maintaining instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the compressor frequency according to the second compressor frequency adjusting instruction.
For example, when the compressor is in a state of maintaining stable frequency variation, if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction, and is recorded as Δ h >0, the first compressor frequency adjustment instruction is preliminarily determined to be an invalid instruction, the first compressor frequency adjustment instruction is not executed, and the compressor frequency adjustment instruction is operated when the stable frequency variation state is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; if the second compressor frequency adjusting instruction is determined to be the maintaining frequency instruction according to the indoor environment temperature, if the second compressor frequency adjusting instruction is recorded as 0, the controller judges that the first compressor frequency adjusting instruction is an instruction generated due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature, and confirms that the first compressor frequency adjusting instruction is an invalid instruction, and the controller controls the compressor to execute the second compressor frequency adjusting instruction, namely the compressor frequency adjusting instruction operates when the frequency stable change state is maintained.
Or, when the compressor is in a state of maintaining stable frequency change, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction, and is recorded as delta h <0, the first compressor frequency adjustment instruction preliminarily judges that the instruction is an invalid instruction, does not execute the instruction, and operates the compressor frequency adjustment instruction when the stable frequency change state is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; if the second compressor frequency adjusting instruction is determined to be the maintaining frequency instruction according to the indoor environment temperature, if the second compressor frequency adjusting instruction is recorded as 0, the controller judges that the first compressor frequency adjusting instruction is an instruction generated due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature, and confirms that the first compressor frequency adjusting instruction is an invalid instruction, and the controller controls the compressor to execute the second compressor frequency adjusting instruction, namely the compressor frequency adjusting instruction operates when the frequency stable change state is maintained.
It should be noted that, after the above re-determination process is finished, the controller may also determine that the compressor is still in a state of maintaining a stable frequency change, so that the controller may still perform the determination when the frequency adjustment command of the compressor changes, and the sampling period during which the controller monitors the indoor ambient temperature is restored to the initial sampling interval Δ t of the indoor ambient temperature.
In some embodiments, when the compressor is in a state of maintaining stable frequency variation, if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction and the second compressor frequency adjustment instruction is an up-frequency adjustment instruction, determining that the second compressor frequency adjustment instruction is consistent with the first compressor frequency adjustment instruction; or if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction and the second compressor frequency adjustment instruction is a frequency reduction adjustment instruction, determining that the second compressor frequency adjustment instruction is consistent with the first compressor frequency adjustment instruction.
For example, when the compressor is in a state of maintaining stable frequency variation, if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction, and is recorded as Δ h >0, the first compressor frequency adjustment instruction is preliminarily determined to be an invalid instruction, the first compressor frequency adjustment instruction is not executed, and the compressor frequency adjustment instruction is operated when the stable frequency variation state is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; and if the second compressor frequency adjusting instruction is determined to be the frequency increasing adjusting instruction according to the indoor environment temperature, if the frequency increasing adjusting instruction is recorded as delta h >0, the controller judges that the first compressor frequency adjusting instruction is an effective instruction, the controller controls the compressor to execute the second compressor frequency adjusting instruction, and the process of re-judging the compressor frequency adjusting instruction when the compressor frequency adjusting instruction changes is exited. Or, when the compressor is in a state of maintaining stable frequency change, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction, and is recorded as delta h <0, the first compressor frequency adjustment instruction preliminarily judges that the instruction is an invalid instruction, does not execute the instruction, and operates the compressor frequency adjustment instruction when the stable frequency change state is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; and if the second compressor frequency adjusting instruction is determined to be the frequency reduction adjusting instruction according to the indoor environment temperature, if the second compressor frequency adjusting instruction is recorded as a frequency reduction adjusting instruction, the frequency reduction adjusting instruction is recorded as delta h <0, the controller judges that the first compressor frequency adjusting instruction is an effective instruction, the controller controls the compressor to execute the second compressor frequency adjusting instruction, and the process of re-judging the second compressor frequency adjusting instruction when the compressor frequency adjusting instruction changes is exited.
The following describes a process for controlling the frequency of the compressor when the compressor is in a state of maintaining a stable variation of the frequency according to an embodiment of the present invention with reference to fig. 2, and the specific steps are as follows.
And step S6, according with the temperature range condition, judging that the indoor environment temperature is in a stable state according to the return air temperature, the target indoor environment temperature and the preset temperature difference threshold value.
In step S7, the frequency control condition is met, that is, it is determined that the n compressor frequency adjustment commands received consecutively are all the maintenance frequency commands.
Step S8, if the conditions of step S6 and step S7 are satisfied simultaneously, in the current compressor frequency adjustment scheme, an abnormality occurs in the compressor frequency adjustment command, that is, a command different from the compressor frequency adjustment command in the frequency stable variation state occurs, and the command is the first compressor frequency adjustment command.
In step S9, the first compressor frequency adjustment command, which is an abnormal compressor frequency adjustment command, is an invalid adjustment command, and the compressor frequency adjustment command in the frequency stable change state is maintained without executing the command.
And step S10, rapidly judging, namely the controller obtains a second compressor frequency adjusting instruction according to the indoor environment temperature, and judging the first compressor frequency adjusting instruction by the second compressor frequency adjusting instruction.
In step S11, if the first compressor frequency adjustment command is a valid command, the adjustment command is executed to jump out of the control logic.
In step S12, if the first compressor frequency adjustment command is an invalid command, the compressor frequency adjustment command is maintained in the frequency stable variation state.
In some embodiments, if the controller continuously receives n times of compressor frequency adjustment commands and determines that the n times of compressor frequency adjustment commands are frequency-increasing adjustment commands, it is determined that the compressor is in a state of maintaining stable variation of frequency-increasing, where n is greater than or equal to 2, if the compressor frequency adjustment commands received three times continuously are Δ h ═ 1, and Δ h ═ 2, respectively, that is, if the received compressor frequency adjustment commands received three times are all frequency-increasing adjustment commands Δ h >0, it indicates that the compressor is operating in a state of continuously frequency-increasing, that is, in a state of maintaining stable variation of frequency-increasing; or, if the controller continuously receives m times of compressor frequency adjustment commands and each time the compressor frequency command is a no-down-frequency adjustment command, the compressor is determined to be in a state of maintaining the stable change of the up-frequency, wherein m is larger than or equal to n, if the compressor frequency adjustment commands received continuously four times are respectively Δ h-1, Δ h-0 and Δ h-2, that is, if the compressor frequency adjustment commands received continuously four times are all no-down-frequency adjustment commands Δ h larger than or equal to 0, the compressor is determined to be in a state of continuously up-frequency, that is, the compressor is determined to be in a state of maintaining the stable change of the up-frequency.
The compressor frequency adjustment command determined to be invalid by the controller is not counted, for example, the frequency adjustment operation frequency is counted, when the compressor frequency adjustment command is Δ h equal to 0 and Δ h equal to 0 twice consecutively, the first compressor frequency adjustment command is Δ h equal to 2 at this time, the command is preliminarily determined to be invalid logically, if the command is still +2 after the repeated determination, the compressor frequency adjustment command for three consecutive times is regarded as Δ h equal to 0, Δ h equal to 0 and Δ h equal to 2, and the adjustment operation frequency history is counted when the first compressor frequency adjustment command, Δ h equal to 2, preliminarily determined to be invalid.
In some embodiments, when the compressor is in a state of maintaining stable variation of the frequency increasing, if the first compressor frequency adjustment command is a frequency decreasing adjustment command Δ h <0 and the second compressor frequency adjustment command is a frequency decreasing adjustment command Δ h not less than 0, it is determined that the second compressor frequency adjustment command is inconsistent with the first compressor frequency adjustment command, and the compressor frequency is controlled according to the second compressor frequency adjustment command.
Specifically, when the compressor is in a state of maintaining the stable variation of the frequency increasing, and the first compressor frequency adjusting instruction is a frequency reducing adjusting instruction Δ h <0, preliminarily judging that the instruction is an invalid instruction, not executing the instruction, and operating the compressor frequency adjusting instruction when the stable variation of the frequency is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; if the second compressor frequency adjusting instruction is determined to be the frequency reduction-free adjusting instruction [ delta ] h is larger than or equal to 0 according to the indoor environment temperature, the controller judges that the first compressor frequency adjusting instruction is an instruction generated due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature, the first compressor frequency adjusting instruction is confirmed to be an invalid instruction, and the controller controls the compressor to execute the second compressor frequency adjusting instruction. After the above re-judging process is finished, the controller can also determine that the compressor is still in a state of maintaining the frequency-increasing stable change, so that the controller can still judge when the frequency adjusting instruction of the compressor changes, and the sampling period of the controller monitoring the indoor environment temperature is recovered to the initial sampling interval delta t of the indoor environment temperature.
In some embodiments, when the compressor is in a state of maintaining stable variation of the frequency increasing, if the first compressor frequency adjustment command is a frequency decreasing adjustment command Δ h <0 and the second compressor frequency adjustment command is a frequency decreasing adjustment command Δ h <0, it is determined that the second compressor frequency adjustment command is identical to the first compressor frequency adjustment command.
Specifically, when the compressor is in a state of maintaining the stable variation of the frequency increasing, and the first compressor frequency adjusting instruction is a frequency reducing adjusting instruction Δ h <0, preliminarily judging that the instruction is an invalid instruction, not executing the instruction, and operating the compressor frequency adjusting instruction when the stable variation of the frequency is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; and if the second compressor frequency adjusting instruction is determined to be the frequency reduction adjusting instruction delta h <0 according to the indoor environment temperature, the controller controls the compressor to execute the second compressor frequency adjusting instruction, and quits the process of re-judging the second compressor frequency adjusting instruction when the compressor frequency adjusting instruction changes.
In some embodiments, if the controller continuously receives n times of compressor frequency adjustment instructions and the n times of compressor frequency adjustment instructions are frequency reduction adjustment instructions, and determines that the compressor is in a state of maintaining stable frequency reduction change, where n is greater than or equal to 2, if the compressor frequency adjustment instructions received three times continuously are Δ h-1, and Δ h-2, respectively, that is, if the compressor frequency adjustment instructions received three times continuously are frequency reduction adjustment instructions Δ h <0, the compressor is operated in a state of continuously frequency reduction, that is, in a state of maintaining stable frequency reduction change; or continuously acquiring p times of compressor frequency adjustment instructions, and determining that the compressor is in a state of maintaining the stable change of the frequency reduction, wherein p is larger than or equal to n, if the compressor frequency adjustment instructions received for four times continuously are respectively delta h-1, delta h-0 and delta h-2, namely the received compressor frequency adjustment instructions for four times are all no frequency increase adjustment instructions delta h less than or equal to 0, the compressor is operated in the state of continuously reducing the frequency, namely the compressor is in the state of maintaining the stable change of the frequency reduction.
In some embodiments, when the compressor is in a state of maintaining stable variation of frequency reduction, if the first compressor frequency adjustment command is the frequency increase adjustment command Δ h >0 and the second compressor frequency adjustment command is the frequency increase adjustment command Δ h no more than 0, determining that the second compressor frequency adjustment command is inconsistent with the first compressor frequency adjustment command, and controlling the compressor frequency according to the second compressor frequency adjustment command.
Specifically, when the compressor is in a state of maintaining stable change of frequency reduction and the first compressor frequency adjustment instruction is the frequency increase adjustment instruction Δ h >0, preliminarily judging that the instruction is an invalid instruction, not executing the instruction, and operating the compressor frequency adjustment instruction when the state of stable change of frequency is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; if the second compressor frequency adjusting instruction is determined to be the frequency reduction-free adjusting instruction delta h not more than 0 according to the indoor environment temperature, the controller judges that the first compressor frequency adjusting instruction is an instruction generated due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature, confirms that the first compressor frequency adjusting instruction is an invalid instruction, and controls the compressor to execute the second compressor frequency adjusting instruction. After the above re-judging process is finished, the controller can also determine that the compressor is still in a state of maintaining the frequency-increasing stable change, so that the controller can still judge when the frequency adjusting instruction of the compressor changes, and the sampling period of the controller monitoring the indoor environment temperature is recovered to the initial sampling interval delta t of the indoor environment temperature.
In some embodiments, when the compressor is in a stable down-conversion state, if the first compressor frequency adjustment command is an up-conversion adjustment command Δ h >0 and the second compressor frequency adjustment command is an up-conversion adjustment command Δ h >0, it is determined that the second compressor frequency adjustment command is consistent with the first compressor frequency adjustment command.
Specifically, when the compressor is in a state of maintaining stable change of frequency reduction and the first compressor frequency adjustment instruction is the frequency increase adjustment instruction Δ h >0, preliminarily judging that the instruction is an invalid instruction, not executing the instruction, and operating the compressor frequency adjustment instruction when the state of stable change of frequency is maintained; detecting the indoor environment temperature at preset time k seconds to carry out re-judgment; and if the second compressor frequency adjusting instruction is determined to be the frequency increasing adjusting instruction delta h >0 according to the indoor environment temperature, the controller controls the compressor to execute the second compressor frequency adjusting instruction, and quits the process of re-judging the compressor frequency adjusting instruction when the compressor frequency adjusting instruction changes.
In a second embodiment of the present invention, an air conditioner 10, as shown in fig. 3, includes at least one processor 11 and a memory 12 communicatively connected to the at least one processor 11.
Wherein, the memory 12 stores a computer program executable by the at least one processor 11, and the at least one processor 11 implements the method for controlling the frequency of the compressor provided by the above-mentioned embodiments when executing the computer program.
According to the air conditioner 10 provided by the embodiment of the invention, the processor 11 adopts the method for controlling the frequency of the compressor provided by the embodiment, so that an invalid compressor frequency adjusting instruction can be effectively identified, the problem that the air conditioner adjusts the frequency of the compressor due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature is avoided, the operation stability of a system is improved, and the energy consumption is saved.
A third embodiment of the present invention provides a computer storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method for controlling the frequency of a compressor provided by the above embodiments.
A fourth embodiment of the present invention provides an air conditioner, as shown in fig. 4, the air conditioner 20 includes a compressor 1, a first temperature sensor 2, and a controller 3.
The first temperature sensor 2 is used for collecting indoor environment temperature; the controller 3 is connected to the compressor 1 and the first temperature sensor 2, respectively, for performing the method of controlling the frequency of the compressor provided in the above embodiment.
According to the air conditioner 20 provided by the embodiment of the invention, the controller 3 executes the method for controlling the frequency of the compressor provided by the embodiment, so that an invalid compressor frequency adjusting instruction can be effectively identified, the problem that the air conditioner adjusts the frequency of the compressor due to the influence of return air temperature fluctuation caused by non-uniform indoor environment temperature is avoided, the operation stability of the system is improved, and the energy consumption is saved.
In some embodiments, as shown in fig. 4, the air conditioner 20 further includes a second temperature sensor 4, the second temperature sensor 4 is connected to the controller 3, and the second temperature sensor 4 is used for collecting the return air temperature; the controller 3 is further configured to obtain the return air temperature and receive the n-time compressor frequency adjustment instructions, determine that the indoor environment temperature is in a stable state according to the return air temperature and a preset temperature threshold, and determine that the n-time compressor frequency adjustment instructions are all frequency maintaining instructions, and then determine that the compressor is in a stable frequency changing state.
In the description of this specification, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of custom logic functions or processes, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (17)
1. A method of controlling a frequency of a compressor, comprising:
determining that the compressor is in a stable frequency change state;
receiving a first compressor frequency adjusting instruction, wherein the first compressor frequency adjusting instruction is different from the compressor frequency adjusting instruction in the frequency stable change state;
acquiring the indoor environment temperature;
obtaining a second compressor frequency adjusting instruction according to the indoor environment temperature;
and if the second compressor frequency adjusting instruction is determined to be inconsistent with the first compressor frequency adjusting instruction, controlling the compressor frequency according to the second compressor frequency adjusting instruction or the compressor frequency adjusting instruction in the frequency stable change state.
2. The method of controlling compressor frequency according to claim 1, further comprising:
and if the second compressor frequency adjusting instruction is consistent with the first compressor frequency adjusting instruction, controlling the compressor frequency according to the second compressor frequency adjusting instruction.
3. The method of claim 2, wherein determining that the compressor is in a steady state change of frequency comprises:
acquiring return air temperature and target indoor environment temperature;
determining the current operation condition of the air conditioner;
receiving a compressor frequency adjusting instruction for n times, wherein n is more than or equal to 2;
and under the current operation working condition, determining that the indoor environment temperature is in a stable state according to the return air temperature, the target indoor environment temperature and a preset temperature difference threshold, and determining that the n-time compressor frequency adjusting instructions are all frequency maintaining instructions, and determining that the compressor is in a stable frequency changing state.
4. The method of claim 3, wherein if it is determined that the second compressor frequency adjustment command is not identical to the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command at the time of the frequency steady state change comprises:
if the first compressor frequency adjusting instruction is an up-frequency adjusting instruction and the second compressor frequency adjusting instruction is a down-frequency adjusting instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the compressor frequency according to the compressor frequency adjusting instruction in the frequency stable change state;
or, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction and the second compressor frequency adjustment instruction is a frequency increase adjustment instruction, determining that the second compressor frequency adjustment instruction is inconsistent with the first compressor frequency adjustment instruction, and controlling the compressor frequency according to the compressor frequency adjustment instruction in the frequency stable change state.
5. The method of controlling compressor frequency according to claim 4, wherein after determining that the second compressor frequency adjustment command is inconsistent with the first compressor frequency adjustment command, the method further comprises:
acquiring the indoor environment temperature;
obtaining a third compressor frequency adjusting instruction according to the indoor environment temperature;
and controlling the compressor frequency according to the matching degree of the third compressor frequency adjusting instruction and the second compressor frequency adjusting instruction.
6. The method of claim 5, wherein if it is determined that the second compressor frequency adjustment command is not identical to the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command at the time of the frequency steady state change state, further comprises:
if the first compressor frequency adjustment instruction is the frequency increasing adjustment instruction and the second compressor frequency adjustment instruction is the frequency maintaining instruction, determining that the second compressor frequency adjustment instruction is inconsistent with the first compressor frequency adjustment instruction, and controlling the compressor frequency according to the second compressor frequency adjustment instruction;
or, if the first compressor frequency adjustment instruction is the frequency reduction adjustment instruction and the second compressor frequency adjustment instruction is the frequency maintenance instruction, determining that the second compressor frequency adjustment instruction is inconsistent with the first compressor frequency adjustment instruction, and controlling the compressor frequency according to the second compressor frequency adjustment instruction.
7. The method of controlling compressor frequency according to claim 3, wherein determining that the second compressor frequency adjustment command is consistent with the first compressor frequency adjustment command comprises:
if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction and the second compressor frequency adjustment instruction is an up-frequency adjustment instruction, determining that the second compressor frequency adjustment instruction is consistent with the first compressor frequency adjustment instruction;
or, if the first compressor frequency adjustment instruction is a frequency reduction adjustment instruction and the second compressor frequency adjustment instruction is a frequency reduction adjustment instruction, determining that the second compressor frequency adjustment instruction is consistent with the first compressor frequency adjustment instruction.
8. The method of claim 2, wherein determining that the compressor is in a steady state change of frequency comprises:
receiving n times of compressor frequency adjusting instructions, determining that the n times of compressor frequency adjusting instructions are frequency raising adjusting instructions, and determining that the compressor is in a state of maintaining frequency raising stable change, wherein n is more than or equal to 2;
or receiving the compressor frequency regulating instruction for m times, wherein the compressor frequency regulating instruction is a non-frequency reduction regulating instruction every time, and determining that the compressor is in a state of maintaining frequency increase stable change, wherein m is larger than or equal to n.
9. The method of claim 8, wherein if it is determined that the second compressor frequency adjustment command is not identical to the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command at the time of the frequency steady state change comprises:
and if the first compressor frequency adjusting instruction is a frequency reduction adjusting instruction and the second compressor frequency adjusting instruction is the frequency reduction adjusting instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the frequency of the compressor according to the second compressor frequency adjusting instruction.
10. The method of controlling compressor frequency according to claim 8, wherein determining that the second compressor frequency adjustment command is consistent with the first compressor frequency adjustment command comprises:
and if the first compressor frequency adjusting instruction is a frequency reduction adjusting instruction and the second compressor frequency adjusting instruction is the frequency reduction adjusting instruction, determining that the second compressor frequency adjusting instruction is consistent with the first compressor frequency adjusting instruction.
11. The method of claim 2, wherein determining that the compressor is in a steady state change of frequency comprises:
receiving n times of compressor frequency adjusting instructions which are frequency reduction adjusting instructions, and determining that the compressor is in a state of maintaining stable change of frequency reduction, wherein n is more than or equal to 2;
or continuously acquiring p times of compressor frequency adjusting instructions, wherein the compressor frequency instructions are all non-frequency-increasing adjusting instructions every time, and determining that the compressor is in a state of maintaining the stable change of frequency reduction, wherein p is more than or equal to n.
12. The method of claim 11, wherein if it is determined that the second compressor frequency adjustment command is not identical to the first compressor frequency adjustment command, controlling the compressor frequency according to the second compressor frequency adjustment command or the compressor frequency adjustment command at the time of the frequency steady state change comprises:
and if the first compressor frequency adjusting instruction is an ascending frequency adjusting instruction and the second compressor frequency adjusting instruction is the non-ascending frequency adjusting instruction, determining that the second compressor frequency adjusting instruction is inconsistent with the first compressor frequency adjusting instruction, and controlling the compressor frequency according to the second compressor frequency adjusting instruction.
13. The method of controlling compressor frequency according to claim 11, wherein determining that the second compressor frequency adjustment command is consistent with the first compressor frequency adjustment command comprises:
and if the first compressor frequency adjustment instruction is an up-frequency adjustment instruction and the second compressor frequency adjustment instruction is the up-frequency adjustment instruction, determining that the second compressor frequency adjustment instruction is consistent with the first compressor frequency adjustment instruction.
14. An air conditioner, comprising:
at least one processor;
a memory communicatively coupled to at least one of the processors;
wherein said memory has stored therein a computer program executable by at least one of said processors, said computer program when executed by at least one of said processors implementing the method of controlling the frequency of a compressor according to any one of claims 1 to 13.
15. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of controlling the frequency of a compressor of any of claims 1-13.
16. An air conditioner, comprising:
a compressor;
the first temperature sensor is used for collecting the indoor environment temperature;
a controller, connected to the compressor and the first temperature sensor, respectively, for performing the method of controlling the frequency of the compressor of any one of claims 1-13.
17. The air conditioner according to claim 16,
the air conditioner also comprises a second temperature sensor, the second temperature sensor is connected with the controller, and the second temperature sensor is used for collecting the return air temperature;
the controller is further used for obtaining the return air temperature and receiving the n-time compressor frequency adjusting instructions, determining that the indoor environment temperature is in a stable state according to the return air temperature and a preset temperature threshold, and determining that the compressor is in a stable frequency maintaining state when the n-time compressor frequency adjusting instructions are frequency maintaining instructions.
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