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CN113757945B - Air conditioner control method and device, air conditioner and computer readable storage medium - Google Patents

Air conditioner control method and device, air conditioner and computer readable storage medium Download PDF

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Publication number
CN113757945B
CN113757945B CN202111128201.6A CN202111128201A CN113757945B CN 113757945 B CN113757945 B CN 113757945B CN 202111128201 A CN202111128201 A CN 202111128201A CN 113757945 B CN113757945 B CN 113757945B
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Prior art keywords
air conditioner
temperature
valve
closing
indoor unit
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CN202111128201.6A
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CN113757945A (en
Inventor
袁文昭
梁勇超
高旭
邵禹琦
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TCL Air Conditioner Zhongshan Co Ltd
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TCL Air Conditioner Zhongshan Co Ltd
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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
    • 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
    • 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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application provides an air conditioner control method, an air conditioner control device, an air conditioner and a computer readable storage medium, wherein the air conditioner control method comprises the following steps: if the air conditioner receives a closing instruction in a non-heating mode, acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit; controlling the opening and closing degree of a valve of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature, so that a refrigerant recovered from an indoor unit to an outdoor unit in the air conditioner partially flows back to the indoor unit; and after the preset opening and closing time, closing the air conditioner. The opening and closing degree of the valve of the electronic expansion valve can be controlled, and finally the refrigerant part completely recycled to the outdoor unit flows back to the indoor unit. The situation that the pressure on the inner side and the outer side of the heat exchanger of the indoor unit is too high and the indoor unit is easy to damage due to the fact that the heat exchanger of the indoor unit has no refrigerant after the refrigerant is completely recycled to the outdoor unit is avoided. Therefore, the service life of the heat exchanger of the indoor unit can be prolonged.

Description

Air conditioner control method and device, air conditioner and computer readable storage medium
Technical Field
The application relates to the field of air conditioners, in particular to an air conditioner control method and device, an air conditioner and a computer readable storage medium.
Background
In the prior art, the air conditioner usually needs to rely on a corresponding refrigerant to complete the heat exchange. Taking the air conditioner as an example for refrigeration, in a refrigeration mode of the air conditioner, low-pressure steam of a refrigerant in a refrigeration system is sucked by a compressor and compressed into high-pressure steam, and then the high-pressure steam is discharged to a condenser. Meanwhile, outdoor air sucked by the axial flow fan flows through the condenser to take away heat emitted by the refrigerant, so that high-pressure refrigerant steam is condensed into high-pressure liquid. The high-pressure liquid is sprayed into the evaporator after passing through the filter and the throttling mechanism, and is evaporated under corresponding low pressure to absorb the surrounding heat. Meanwhile, the cross flow fan enables air to continuously enter fins of the evaporator for heat exchange, and the air which is cooled after heat release is sent to the indoor space. Thus, the indoor air continuously circulates and flows to achieve the purpose of reducing the temperature. Therefore, when the air conditioner performs the heat exchange operation, the refrigerant performs the heat transportation operation. With the operation of the air conditioner, the refrigerant remains in the pipes of the indoor unit and the outdoor unit, and if the refrigerant leaks, the refrigerant leaking from the indoor unit may cause damage to the human body. Therefore, in order to prevent such an occurrence, it is necessary to completely recover the refrigerant to the outdoor unit.
However, after the refrigerant is completely recovered to the outdoor unit, the heat exchanger of the indoor unit is free of the refrigerant, so that the internal pressure of the heat exchanger of the indoor unit is far lower than the external pressure, the pressure difference between the inner side and the outer side of the heat exchanger of the indoor unit is too large, and the service life of the heat exchanger of the indoor unit is influenced.
Disclosure of Invention
The application provides an air conditioner control method, which can enable a refrigerant part completely recycled to an outdoor unit in the air conditioner to flow back to an indoor unit by controlling the opening degree of a valve of an electronic expansion valve in the air conditioner.
In one aspect, the present application provides an air conditioner control method, including:
if the air conditioner receives a closing instruction in a non-heating mode, acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit;
controlling the opening and closing degree of a valve of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature, so that a refrigerant recovered from an indoor unit to an outdoor unit in the air conditioner partially flows back to the indoor unit;
and after the preset opening and closing time, closing the air conditioner.
In some embodiments of the present application, the controlling a valve opening/closing degree of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature includes:
judging the relationship between the current copper pipe surface temperature and the current indoor environment temperature;
if the current surface temperature of the copper pipe is equal to the current indoor environment temperature, determining that the refrigerant is completely recycled from the indoor unit to the outdoor unit;
and controlling the opening degree of the valve of the electronic expansion valve through the preset opening degree of the valve.
In some embodiments of the present application, the controlling the valve opening and closing degree of the electronic expansion valve by a preset valve opening and closing degree includes:
closing the opening degree of the valve according to a preset compressor running frequency;
acquiring a temperature difference value between the current copper pipe surface temperature and the current indoor environment temperature;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature difference value and the preset opening degree of the valve.
In some embodiments of the present application, the controlling the valve opening and closing degree of the electronic expansion valve according to the temperature difference value and the preset valve opening and closing degree includes:
comparing the temperature difference with a preset temperature threshold value to obtain a temperature comparison relation;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature comparison relation and the preset opening degree of the valve.
In some embodiments of the present application, the comparing the temperature difference value with a preset temperature threshold to obtain a temperature comparison relationship includes:
if the temperature difference is larger than the temperature threshold, obtaining a first temperature relation;
and if the temperature difference is smaller than or equal to the temperature threshold, obtaining a second temperature relation.
In some embodiments of the present application, the controlling the valve opening and closing degree of the electronic expansion valve according to the temperature comparison relationship and the preset valve opening and closing degree includes:
if the first temperature relation is obtained, stopping the air conditioner;
opening the electronic expansion valve according to the preset valve opening degree;
and if the opening time of the electronic expansion valve reaches the opening and closing time, closing the opening degree of the valve of the electronic expansion valve.
In some embodiments of the present application, before obtaining a current copper pipe surface temperature and a current indoor environment temperature of an indoor unit heat exchanger if the air conditioner receives a turn-off command in a non-heating mode, the method further includes:
judging the current operation mode of the air conditioner when the air conditioner receives the closing instruction;
if the current operation mode is a heating mode, the air conditioner is closed;
and restarting the air conditioner in a refrigeration mode until the closing time of the air conditioner reaches a preset closing time.
In another aspect, the present application also provides an air conditioner control apparatus, the apparatus including:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit if the air conditioner receives a closing instruction in a non-heating mode;
the control module is used for controlling the opening and closing degree of a valve of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature, so that a refrigerant recovered from an indoor unit to an outdoor unit in the air conditioner is partially returned to the indoor unit;
and the closing module is used for closing the air conditioner after preset opening and closing time.
In some embodiments of the present application, the control module is specifically configured to:
judging the relationship between the current copper pipe surface temperature and the current indoor environment temperature;
if the current surface temperature of the copper pipe is equal to the current indoor environment temperature, determining that the refrigerant is completely recycled from the indoor unit to the outdoor unit;
and controlling the opening degree of the valve of the electronic expansion valve through the preset opening degree of the valve.
In some embodiments of the present application, the control module is further specifically configured to:
closing the opening degree of the valve according to a preset compressor running frequency;
acquiring a temperature difference value between the current copper pipe surface temperature and the current indoor environment temperature;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature difference value and the preset opening degree of the valve.
In some embodiments of the present application, the control module is further specifically configured to:
comparing the temperature difference with a preset temperature threshold value to obtain a temperature comparison relation;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature comparison relation and the preset opening degree of the valve.
In some embodiments of the present application, the control module is further specifically configured to:
if the temperature difference is larger than the temperature threshold, obtaining a first temperature relation;
and if the temperature difference is smaller than or equal to the temperature threshold, obtaining a second temperature relation.
In some embodiments of the present application, the control module is further specifically configured to:
if the first temperature relation is obtained, stopping the air conditioner;
opening the electronic expansion valve according to the preset valve opening degree;
and if the opening time of the electronic expansion valve reaches the opening and closing time, closing the opening degree of the valve of the electronic expansion valve.
In another aspect, the present application further provides an air conditioner, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any one of the air conditioner control methods.
In another aspect, the present application also provides a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement any one of the air conditioner control methods.
The method and the device can control the opening and closing degree of the valve of the electronic expansion valve, and finally return the refrigerant part completely recovered to the outdoor unit to the indoor unit. The situation that after the refrigerant is completely recycled to the outdoor unit, the pressure inside the heat exchanger of the indoor unit is too low, so that the pressure inside and outside the heat exchanger of the indoor unit is too high, and the indoor unit is easily damaged is avoided. Therefore, a part of the refrigerant completely recovered to the outdoor unit is returned to the heat exchanger of the indoor unit, and the service life of the heat exchanger of the indoor unit can be prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a scenario of an air conditioner control system provided in an embodiment of the present application;
FIG. 2 is a flow chart illustrating an embodiment of an air conditioner control method according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of an embodiment of an air conditioner control device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an embodiment of an air conditioner in the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "a" and "an" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "a" or "an" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The present application provides an air conditioner control method, apparatus, air conditioner and computer readable storage medium, which are described below.
Some basic concepts involved in the embodiments of the present application are first described below:
air Conditioner (Air Conditioner): generally comprises a cold source/heat source device, a cold and hot medium delivery and distribution system, a terminal device and other auxiliary devices. The system mainly comprises a refrigeration host machine, a water pump, a fan and a pipeline system. The end device is responsible for specifically processing the air state by utilizing the cold and heat quantity from the transmission and distribution so as to enable the air parameters of the target environment to meet certain requirements.
Referring to fig. 1, fig. 1 is a schematic view of a scene of an air conditioner control method according to an embodiment of the present disclosure, where the air conditioner control system may include at least one indoor unit 100 and an outdoor unit 200, the indoor unit 100 and the outdoor unit 200 are connected by a pipeline, and the indoor unit 100 may receive a control signal from a remote controller or a control panel to perform a series of functions of the air conditioner indoor unit, such as cooling, heating, dehumidifying, and dedusting. An outdoor unit 200 capable of performing operations such as condensation, heat dissipation, and air discharge in cooperation with the indoor unit 100; the indoor unit 100 may also execute a corresponding preset program, such as the air conditioner control method in the present application, before executing a corresponding action according to the control signal.
In the embodiment of the present invention, the indoor unit 100 includes, but is not limited to, a wall-mounted indoor unit, a cabinet-mounted indoor unit, a window-mounted indoor unit, a ceiling-mounted indoor unit, an embedded indoor unit, and the like.
In the embodiment of the present application, the indoor unit 100 and the outdoor unit 200 may be connected in any manner, including but not limited to signal communication through an electronic circuit and communication through a wireless signal, where the wireless signal may be computer network communication of a TCP/IP Protocol Suite (TCP/IP) or a User Datagram Protocol (UDP).
Those skilled in the art can understand that the application environment shown in fig. 1 is only one application scenario of the present application, and does not constitute a limitation on the application scenario of the present application, and other application environments may further include more or fewer indoor units and outdoor units than those shown in fig. 1, for example, only 1 indoor unit or outdoor unit is shown in fig. 1, and the air conditioner control system of the present application may further include one or more indoor units and outdoor units for executing the air conditioner control method of the present application, which is not limited herein.
It should be noted that the scenario diagram of the air conditioner control system shown in fig. 1 is only an example, and the air conditioner control system and the scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application.
As shown in fig. 2, fig. 2 is a schematic flowchart of an embodiment of a method for controlling an air conditioner in an embodiment of the present application, where the method may include the following steps 201 to 203:
201. and if the air conditioner receives a closing instruction in a non-heating mode, acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit.
The air conditioner may include a plurality of modes having different functions when operating, but may be roughly classified into two types, one type being a mode for lowering an indoor ambient temperature and the other type being a mode for raising the indoor ambient temperature. And the flow direction of the refrigerant is opposite based on the two types of modes. Therefore, in order to better control the recovery of the refrigerant, the flow direction of one of the refrigerants may be used as a reference, that is, a mode for reducing the indoor environment temperature is selected as a reference of the flow direction of the refrigerant, that is, a non-heating mode in this step.
In addition, the shutdown instruction herein refers to a shutdown instruction of the air conditioner, and the shutdown instruction may be a shutdown instruction sent by a remote controller of the air conditioner through a user, or may be another shutdown instruction, which is not limited herein.
Meanwhile, the current copper pipe surface temperature and the current indoor environment temperature of the indoor unit heat exchanger can be obtained through arranging a temperature sensor to obtain corresponding temperatures, and the method is not limited in detail here.
202. And controlling the opening and closing degree of a valve of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature, so that the refrigerant recovered from the indoor unit to the outdoor unit in the air conditioner partially flows back to the indoor unit.
Firstly, after the air conditioner normally operates, the refrigerant can be normally distributed in the pipeline of the air conditioner, and in order to achieve the effect of part of the refrigerant in the heat exchanger of the indoor unit, the control program cannot be too complicated. Therefore, it is necessary to completely recover the refrigerant to the heat exchanger of the outdoor unit. After the refrigerant is completely recycled into the heat exchanger of the outdoor unit, the specific amount of the refrigerant can be better controlled to flow back to the heat exchanger of the indoor unit. Therefore, in order to achieve the effect of returning part of the refrigerant to the heat exchanger of the indoor unit, the refrigerant needs to be completely recovered to the outdoor unit.
In order to better implement the embodiment of the present application, in the embodiment of the present application, the method for controlling the opening and closing degree of the electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature includes:
judging the relation between the current surface temperature of the copper pipe and the current indoor environment temperature;
if the current surface temperature of the copper pipe is equal to the current indoor environment temperature, determining that the refrigerant is completely recycled from the indoor unit to the outdoor unit;
and controlling the opening degree of the valve of the electronic expansion valve through the preset opening degree of the valve.
Therefore, in order to fully recover the refrigerant to the outdoor unit, the characteristics of the refrigerant need to be considered. As is well known, a refrigerant is a medium for performing heat exchange. When the refrigerant recovery procedure is started, the refrigerant is gradually recovered to the outdoor unit. Because the function of the refrigerant is heat exchange, when the air conditioner works, the temperature of the refrigerant is higher than the ambient temperature or lower than the ambient temperature, and only then, the refrigerant can change the environment.
Therefore, if there is no refrigerant in the heat exchanger of the indoor unit, this means that the temperature inside the heat exchanger of the indoor unit does not differ much from the indoor ambient temperature (if the error is allowable). The most direct embodiment is the copper pipe in the heat exchanger of the indoor unit, which is in direct contact with the refrigerant. When no refrigerant exists in the indoor unit heat exchanger, the copper pipe of the indoor unit heat exchanger can not contact the refrigerant, and therefore the copper pipe of the indoor unit heat exchanger can be in direct contact with air. When the surface temperature of the copper pipe of the heat exchanger of the indoor unit approaches the indoor environment temperature, the refrigerant can be proved not to be in the heat exchanger of the indoor unit. Then, the refrigerant can be left in the outdoor unit compressor according to the check valve installed at the inlet of the outdoor unit compressor. Thus, it can be determined that the refrigerant of the indoor unit is completely stored in the outdoor unit.
After the refrigerant is recovered and stored in the outdoor unit according to the above embodiments, a portion of the refrigerant may be controlled to flow back to the heat exchanger of the indoor unit.
In order to better implement the embodiment of the present application, in the embodiment of the present application, the valve opening and closing degree of the electronic expansion valve is controlled by a preset valve opening and closing degree, including:
closing the opening degree of the valve according to the preset running frequency of the compressor;
acquiring a temperature difference value between the current surface temperature of the copper pipe and the current indoor environment temperature;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature difference and the preset opening degree of the valve.
According to the above embodiments, the refrigerant functions as heat conduction and heat exchange, as exemplified by the related mode of refrigeration. When refrigerating, the temperature of the refrigerant is lower than the indoor environment temperature, and only then, the refrigerant can absorb the indoor temperature when passing through the heat exchanger of the indoor unit, so that the absorbed temperature is brought to the outdoor unit to be released, and the indoor environment temperature can be reduced.
Therefore, the air conditioner starts to operate according to a certain operation frequency, the valve opening degree of the electronic expansion valve is closed, and therefore the refrigerant can be intercepted by the electronic expansion valve, and the refrigerant cannot flow into the heat exchanger of the indoor unit through the pipeline.
Because the refrigerant is intercepted at the electronic expansion valve, the air conditioner is also in operation at the moment, and because of no heat exchange of the refrigerant, the airflow blown out by the air conditioner cannot achieve the cooling effect under the condition of refrigerant holding. In this way, the copper pipe of the indoor unit heat exchanger is blown by the airflow, and the temperature is reduced too fast under the condition that the refrigerant does not absorb heat. Along with the increase of the operation time of the air conditioner, the temperature of the copper pipe is gradually reduced, so that the temperature difference with the indoor environment temperature is generated, and therefore, in the time, the refrigerant is gathered at the electronic expansion valve to a certain amount. When the specific quantity of the refrigerants accumulated at the electronic expansion valve can be determined, the quantity of the refrigerants entering the indoor unit heat exchanger can be controlled according to the specific quantity of the refrigerants.
Therefore, in order to determine how much refrigerant is collected at the electronic expansion valve, in an embodiment of the present application, the controlling the opening degree of the valve of the electronic expansion valve according to the temperature difference and the preset opening degree of the valve includes:
comparing the temperature difference value with a preset temperature threshold value relation to obtain a temperature comparison relation;
and controlling the valve opening degree of the electronic expansion valve according to the temperature comparison relation and the preset valve opening degree.
According to the embodiment, the temperature of the copper pipe on the heat exchanger of the indoor unit is gradually reduced along with the operation of the air conditioner, and the refrigerant is gathered at the electronic expansion valve along with the increase of the operation time. Therefore, the amount of the refrigerant collected at the electronic expansion valve can be determined according to the temperature difference between the copper pipe and the indoor environment.
Specifically, the temperature threshold in this embodiment may be set according to different indoor space sizes, for example: a 10 square meter room may be set with a temperature threshold of 2 degrees celsius, although the temperature threshold is not limited to the specific range.
After the temperature threshold is set, two relation conditions can be obtained after the temperature threshold is compared with the temperature difference value:
and (1) if the temperature difference is larger than the temperature threshold, obtaining a first temperature relation.
And (2) if the temperature difference is less than or equal to the temperature threshold, obtaining a second temperature relation.
Under general conditions, the temperature of a copper pipe of the heat exchanger of the indoor unit is equal to the temperature of the indoor environment, and the temperature of the copper pipe can slowly decrease until the temperature difference between the temperature of the copper pipe and the temperature of the indoor environment reaches a certain degree after the control method in the embodiment of the application is started. Of course, in order to avoid the occurrence of a special situation, for example, the temperature of the copper pipe is higher than the indoor ambient temperature at the beginning, and in order to avoid the occurrence of a special situation, if the program for processing the special situation is not introduced in advance, the air conditioner will have an error when executing the relevant program, and the special situation is also classified into the second temperature relationship.
In order to better implement the embodiment of the present application, in the embodiment of the present application, the valve opening degree of the electronic expansion valve is controlled according to the temperature comparison relationship and a preset valve opening degree, including:
if the first temperature relation is obtained, stopping the air conditioner;
opening the electronic expansion valve according to a preset valve opening degree;
and if the opening time of the electronic expansion valve reaches the opening and closing time, closing the valve opening and closing degree of the electronic expansion valve.
After the first temperature relation is obtained, the refrigerant accumulated at the electronic expansion valve reaches the corresponding amount of the refrigerant. At this time, the air conditioner is not required to operate according to the preset frequency, so that the air conditioner can be prevented from continuously enabling the refrigerant of the outdoor unit to flow to the electronic expansion valve.
At this time, the electronic expansion valve is opened, and a certain pressure difference is formed between two ends of the electronic expansion valve because no refrigerant exists in the heat exchanger of the indoor unit and a part of refrigerant is collected at one section of the electronic expansion valve. When the electronic expansion valve is opened according to a certain opening and closing angle, the refrigerant can be pressed into the heat exchanger of the indoor unit according to a certain flow rate according to the opening degree of the valve of the electronic expansion valve due to the existence of pressure difference. At the moment, the quantity of the refrigerant flowing back to the heat exchanger of the indoor unit is controlled according to the relevant preset time. For example: when the opening degree of the electronic expansion valve is 30 degrees, the preset time is 1 minute, so that the amount of the returned refrigerant can be determined according to the flow and the time of opening and closing the electronic expansion valve by 30 degrees. It should be noted that the opening degree of the valve and the opening time of the valve can be adjusted according to the specific room size, and the details are not limited herein.
When the opening and closing time is determined, part of the refrigerant can flow back to the heat exchanger of the indoor unit, and the specific refrigerant amount flowing back to the heat exchanger of the indoor unit can be controlled by knowing the opening and closing degree and the opening time of the valve. When the amount of the returned refrigerant reaches the expectation, the electronic expansion valve is closed, and then the continuous return action can be interrupted, so that the return amount of the refrigerant is controlled.
203. And after the preset opening and closing time, closing the air conditioner.
According to the scheme described in the above embodiment, when the electronic expansion valve is closed to control the backflow amount of the refrigerant, the control flow of part of the refrigerant flowing back to the heat exchanger of the indoor unit is already completed, and the air conditioner is not required to be operated, which results in waste of power. Therefore, after the electronic expansion valve is closed, the air conditioner is controlled to be completely closed.
The opening and closing degree of the valve of the electronic expansion valve can be controlled, and finally the refrigerant part completely recycled to the outdoor unit flows back to the indoor unit. The situation that after the refrigerant is completely recycled to the outdoor unit, the pressure inside the heat exchanger of the indoor unit is too low, so that the pressure inside and outside the heat exchanger of the indoor unit is too high, and the indoor unit is easily damaged is avoided. Therefore, a part of the refrigerant completely recovered to the outdoor unit is returned to the heat exchanger of the indoor unit, and the service life of the heat exchanger of the indoor unit can be prolonged.
In order to better implement the embodiment of the present application, in the embodiment of the present application, before obtaining the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit if the air conditioner receives the shutdown instruction in the non-heating mode, the method further includes:
judging the current operation mode of the air conditioner when receiving a closing instruction;
if the current operation mode is the heating mode, the air conditioner is closed;
and restarting the air conditioner in a refrigeration mode until the closing time of the air conditioner reaches a preset closing time.
Since the above embodiments have described the effect of the cooling related mode and the heating related mode of the air conditioner on the refrigerant flow direction, detailed descriptions thereof are omitted here. In order to make the air conditioner have the best effect of starting to collect the refrigerant to the outdoor unit, the current operation mode of the air conditioner needs to be determined.
If the air conditioner is operated in a heating related mode, the air conditioner needs to be turned off at the moment, and then the air conditioner is turned on in a cooling mode. The purpose is to avoid the influence on the recovery effect of the refrigerant when the pressures are not balanced for the purpose of balancing the pressures of the condenser of the outdoor unit and the evaporator of the indoor unit. In order to balance the pressures of the condenser of the outdoor unit and the evaporator of the indoor unit, the shutdown time may be 3 minutes, which may be adjusted according to specific situations, and is not limited herein.
In order to better implement the air conditioner control method in the embodiment of the present application, in addition to the air conditioner control method, an embodiment of the present application further provides an air conditioner control device, as shown in fig. 3, where the device 300 includes:
the obtaining module 301 is configured to obtain a current copper pipe surface temperature and a current indoor environment temperature of the indoor unit heat exchanger if the air conditioner receives a closing instruction in the non-heating mode.
And the control module 302 is configured to control a valve opening/closing degree of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature, so that a refrigerant in the air conditioner is recovered from the indoor unit to the outdoor unit, and part of the refrigerant flows back to the indoor unit.
And a closing module 303, configured to close the air conditioner after a preset opening and closing time elapses.
According to the air conditioner, the acquisition module 301 can be controlled to acquire relevant temperature information, the control module 302 controls the opening and closing degree of the valve of the electronic expansion valve according to the relevant temperature information, and finally, after the refrigerant part completely recovered to the outdoor unit flows back to the indoor unit, the closing module 303 is used for finishing the backflow operation of the refrigerant, and the operation of the air conditioner is closed. The situation that after the refrigerant is completely recycled to the outdoor unit, the pressure inside the heat exchanger of the indoor unit is too low, so that the pressure inside and outside the heat exchanger of the indoor unit is too high, and the indoor unit is easily damaged is avoided. Therefore, a part of the refrigerant completely recovered to the outdoor unit is returned to the heat exchanger of the indoor unit, and the service life of the heat exchanger of the indoor unit can be prolonged.
In some embodiments of the present application, the control module 302 is specifically configured to:
judging the relationship between the current copper pipe surface temperature and the current indoor environment temperature;
if the current surface temperature of the copper pipe is equal to the current indoor environment temperature, determining that the refrigerant is completely recycled from the indoor unit to the outdoor unit;
and controlling the opening degree of the valve of the electronic expansion valve through the preset opening degree of the valve.
In some embodiments of the present application, the control module 302 is further specifically configured to:
closing the opening degree of the valve according to the preset running frequency of the compressor;
acquiring a temperature difference value between the current surface temperature of the copper pipe and the current indoor environment temperature;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature difference and the preset opening degree of the valve.
In some embodiments of the present application, the control module 302 is further specifically configured to:
comparing the temperature difference value with a preset temperature threshold value relation to obtain a temperature comparison relation;
and controlling the valve opening degree of the electronic expansion valve according to the temperature comparison relation and the preset valve opening degree.
In some embodiments of the present application, the control module 302 is further specifically configured to:
if the temperature difference is larger than the temperature threshold, obtaining a first temperature relation;
and if the temperature difference is smaller than or equal to the temperature threshold value, obtaining a second temperature relation.
In some embodiments of the present application, the control module 302 is further specifically configured to:
if the first temperature relation is obtained, stopping the air conditioner;
opening the electronic expansion valve according to a preset valve opening degree;
and if the opening time of the electronic expansion valve reaches the opening and closing time, closing the valve opening and closing degree of the electronic expansion valve.
On the other hand, the embodiment of the application also provides an air conditioner, the air conditioner comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, and the processor executes the computer program to realize the air conditioner control method of any one item.
An embodiment of the present application further provides an air conditioner, in which the air conditioner control device according to any one of the embodiments of the present application is integrated, as shown in fig. 4, which shows a schematic structural diagram of the air conditioner according to the embodiment of the present application, specifically:
the air conditioner of this embodiment may further include components such as a processor 401 of one or more processing cores, a memory 402 of one or more computer-readable storage media, a power supply 403, and an input unit 404, in addition to the devices included in a normal air conditioner, such as a compressor, a four-way valve, and an electronic expansion valve, a check valve, a low-pressure stop valve, a high-pressure stop valve, a gas-liquid separator, a low-pressure sensor, a high-pressure sensor, an external unit throttling device, an oil separator, and an oil return capillary tube. Those skilled in the art will appreciate that the air conditioner configuration shown in fig. 4 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. Wherein:
the processor 401 is a control center of the air conditioner control method, connects various parts of the whole air conditioner by using various interfaces and lines, and executes various functions and processes data of the air conditioner by running or executing software programs and/or modules stored in the memory 402 and calling data stored in the memory 402, thereby performing overall monitoring on the operation of the air conditioner control method. Alternatively, processor 401 may include one or more processing cores; the Processor 401 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, preferably the processor 401 may integrate an application processor, which handles primarily the operating system, user interfaces, application programs and the like, and a modem processor, which handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 401.
The memory 402 may be used to store software programs and modules, and the processor 401 executes various functional applications and data processing by operating the software programs and modules stored in the memory 402. The memory 402 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a control program of the air conditioner of the present application), and the like; the storage data area may store data created according to the use of the air conditioner, and the like. Further, the memory 402 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 402 may also include a memory controller to provide the processor 401 access to the memory 402.
The air conditioner further includes a power supply 403 for supplying power to each component, and preferably, the power supply 403 may be logically connected to the processor 401 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The power supply 403 may also include any component of one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.
The air conditioner may further include an input unit 404, and the input unit 404 may be used to receive input numeric or character information and generate a remote controller related to user setting and function control, a control panel of the air conditioner, or input through an intelligent home system such as a remote network, APP, or instant voice signal.
Although not shown, the air conditioner may further include a display unit, for example, a display panel for displaying the air conditioner operation parameters, which is not described herein in detail.
In addition, in this embodiment, specifically, the processor 401 in the air conditioner loads an executable file corresponding to a process of one or more application programs into the memory 402 according to the following instructions, and the processor 401 runs the application programs stored in the memory 402, so as to implement various functions, for example:
if the air conditioner receives a closing instruction in a non-heating mode, acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit;
controlling the opening and closing degree of a valve of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature, so that a refrigerant recovered from an indoor unit to an outdoor unit in the air conditioner partially flows back to the indoor unit;
and after the preset opening and closing time, closing the air conditioner.
In another aspect, the present application also provides a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement any one of the air conditioner control methods.
To this end, an embodiment of the present application provides a computer-readable storage medium, which may include: read Only Memory (ROM), random Access Memory (RAM), and the like. The air conditioner control method comprises a step of storing a computer program, and a step of loading the computer program by a processor to execute the steps of any one of the air conditioner control methods provided by the embodiment of the application. For example, the computer program may be loaded by a processor to perform the steps of:
if the air conditioner receives a closing instruction in a non-heating mode, acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit;
controlling the opening and closing degree of a valve of an electronic expansion valve of the air conditioner according to the current surface temperature of the copper pipe and the current indoor environment temperature, so that the refrigerant recovered from the indoor unit to the outdoor unit in the air conditioner partially flows back to the indoor unit;
and after the preset opening and closing time, closing the air conditioner.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, which are not described herein again.
In a specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as one or several entities, and the specific implementation of each unit or structure may refer to the foregoing method embodiment, which is not described herein again.
The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.
The foregoing detailed description has been made of the air conditioner control method, apparatus, air conditioner and computer readable storage medium provided in the embodiments of the present application, and specific examples have been applied herein to explain the principles and embodiments of the present application, where the descriptions of the foregoing embodiments are only used to help understand the method and its core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (9)

1. An air conditioner control method, characterized in that the method comprises:
if the air conditioner receives a closing instruction in a non-heating mode, acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit;
judging the relationship between the current copper pipe surface temperature and the current indoor environment temperature; if the current surface temperature of the copper pipe is equal to the current indoor environment temperature, determining that the refrigerant is completely recycled from the indoor unit to the outdoor unit;
controlling the opening degree of a valve of an electronic expansion valve of the air conditioner through the preset opening degree of the valve, so that the refrigerant recovered from an indoor unit to an outdoor unit in the air conditioner partially flows back to the indoor unit;
and after the preset opening and closing time, closing the air conditioner.
2. The air conditioner control method according to claim 1, wherein the controlling the valve opening and closing degree of the electronic expansion valve by a preset valve opening and closing degree comprises:
closing the opening degree of the valve according to a preset compressor running frequency;
acquiring a temperature difference value between the current copper pipe surface temperature and the current indoor environment temperature;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature difference value and the preset opening degree of the valve.
3. The air conditioner control method according to claim 2, wherein the controlling the degree of opening and closing of the valve of the electronic expansion valve based on the temperature difference and the preset degree of opening and closing of the valve comprises:
comparing the temperature difference with a preset temperature threshold value to obtain a temperature comparison relation;
and controlling the opening degree of the valve of the electronic expansion valve according to the temperature comparison relation and the preset opening degree of the valve.
4. The air conditioner control method according to claim 3, wherein the comparing the temperature difference value with a preset temperature threshold value to obtain a temperature comparison relationship comprises:
if the temperature difference is larger than the temperature threshold, obtaining a first temperature relation;
and if the temperature difference is smaller than or equal to the temperature threshold, obtaining a second temperature relation.
5. The air conditioner control method according to claim 4, wherein the controlling the valve opening and closing degree of the electronic expansion valve according to the temperature comparison relationship and the preset valve opening and closing degree comprises:
if the first temperature relation is obtained, stopping the air conditioner;
opening the electronic expansion valve according to the preset valve opening degree;
and if the opening time of the electronic expansion valve reaches the opening and closing time, closing the opening degree of the valve of the electronic expansion valve.
6. The method as claimed in claim 1, wherein if the air conditioner receives a turn-off command in the non-heating mode, the method further comprises the steps of obtaining a current copper tube surface temperature of an indoor unit heat exchanger and a current indoor environment temperature, and before:
judging the current operation mode of the air conditioner when the air conditioner receives the closing instruction;
if the current operation mode is a heating mode, the air conditioner is closed;
and restarting the air conditioner in a refrigeration mode until the closing time of the air conditioner reaches a preset closing time.
7. An air conditioner control device, characterized in that the device comprises:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current copper pipe surface temperature and the current indoor environment temperature of the heat exchanger of the indoor unit if the air conditioner receives a closing instruction in a non-heating mode;
the control module is used for judging the relationship between the current copper pipe surface temperature and the current indoor environment temperature; if the current surface temperature of the copper pipe is equal to the current indoor environment temperature, determining that the refrigerant is completely recycled from the indoor unit to the outdoor unit; controlling the opening degree of a valve of an electronic expansion valve of the air conditioner through the preset opening degree of the valve, so that the refrigerant recovered from an indoor unit to an outdoor unit in the air conditioner partially flows back to the indoor unit;
and the closing module is used for closing the air conditioner after preset opening and closing time.
8. An air conditioner, characterized in that the air conditioner comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the air conditioner control method according to any one of claims 1 to 6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which is executed by a processor to implement the air conditioner control method according to any one of claims 1 to 6.
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