CN115355639A - Refrigerator and vibration adjusting method of compressor - Google Patents

Abstract

The invention discloses a vibration adjustment method for a refrigerator and a compressor. The refrigerator includes a compressor and a compressor pipeline connected thereto. It is also provided with a vibration adjustment system including a mass unit and an adjustable stiffness unit. The mass unit and the adjustable stiffness unit are stacked and fixedly connected to the compressor pipeline. at least one side. After the refrigerator is powered on, the current working state of the compressor is obtained, and the vibration frequency of the compressor pipeline and/or the displacement of the mass unit are obtained in real time, and then according to the current working state of the compressor and the The vibration frequency and/or the displacement change, and the stiffness of the adjustable stiffness unit is adjusted so that the natural frequency of the vibration adjustment system is equal to or close to the vibration frequency. By adopting the invention, the natural frequency can be adaptively adjusted according to the working state of the compressor, the vibration energy of the pipeline of the compressor can be absorbed, and the vibration and noise of the compressor under different working states can be effectively reduced.

Description

A vibration adjustment method for refrigerators and compressors

technical field

The invention relates to the technical field of refrigerators, in particular to a vibration adjustment method for refrigerators and compressors.

Background technique

With people's continuous pursuit of high-quality life, refrigerators with low noise and stable operation have become the most basic requirements of users for refrigerators, and are the basic factors to measure the quality of refrigerators. The vibration noise generated during the operation of the refrigerator greatly affects the user's experience of the refrigerator.

The main source of vibration and noise of the refrigerator is the compressor, and the suction pipe and exhaust pipe of the compressor are the main paths for vibration transmission. As shown in Figure 1, Figure 1 is a schematic diagram of the refrigerator compressor and its pipeline structure in the prior art, one end of the compressor suction pipe and exhaust pipeline is fixed on the compressor, and the other end extends into the foam layer of the box body , the pipeline in the middle is approximately suspended. The vibration of the pipeline mainly comes from two aspects. On the one hand, the vibration of the compressor is directly transmitted to the pipeline, and on the other hand, the pulsation of the refrigerant in the pipeline causes the pipeline to vibrate. During the operation of the reciprocating compressor, the rotating crank will generate a rotating inertial force, the reciprocating piston will generate a reciprocating inertial force, and the connecting rod between them will generate both a rotating inertial force and a reciprocating inertial force. The periodically changing inertial force causes the compressor to vibrate, and the exhaust process of the compressor to the exhaust pipe is intermittent, which will cause the pressure in the pipeline to rise and fall, the airflow speed to be fast and slow, and the gas in the pipeline Fluctuating pressure and gas flow rate will cause pressure pulsation, and pressure pulsation will generate a pulsating excitation force on the pipeline, thereby exciting the pipeline for mechanical vibration. Refrigerant pressure pulsation and compressor vibration will cause pipeline Large vibrations are generated, and the vibration of the pipeline is transmitted to the box, causing the box to vibrate, emitting obvious buzzing noise, and degrading the user experience.

In the prior art, the vibration damping method for the compressor pipeline is usually to use rubber blocks to buffer the compressor pipeline to reduce vibration energy. However, the inventors found that there are at least the following problems in the prior art: for variable frequency compressors, the compressor speed will change with different operating environments and operating requirements, and the rubber block can only attenuate the vibration at a specific frequency, and cannot reduce all frequency bands vibration energy, so it is difficult to achieve a better effect of vibration and noise reduction.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a vibration adjustment method for refrigerators and compressors, which can adaptively adjust the natural frequency according to the working state of the compressor, absorb the vibration energy of the compressor pipeline, and effectively reduce the vibration of the compressor in different working states. under vibration and noise.

To achieve the above object, an embodiment of the present invention provides a refrigerator, including:

The compressor and the compressor pipeline connected to it;

The vibration adjustment system includes a mass unit and an adjustable stiffness unit; the mass unit and the adjustable stiffness unit are stacked and fixedly connected to at least one side of the compressor pipeline;

a vibration sensor, used to detect the vibration frequency of the compressor pipeline;

a displacement sensor for detecting the displacement of the mass unit;

controller for:

After the refrigerator is powered on, obtain the current working state of the compressor;

Obtaining the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time;

According to the current working state of the compressor and the change of the vibration frequency and/or the displacement, adjust the stiffness of the adjustable stiffness unit so that the natural frequency of the vibration adjustment system is equal to or close to the the vibration frequency.

As an improvement to the above solution, the adjustment of the stiffness of the adjustable stiffness unit according to the current working state of the compressor and the change of the vibration frequency and/or the displacement specifically includes:

According to the current working state of the compressor, a preset stiffness adjustment signal is sent to the adjustable stiffness unit; the stiffness adjustment signal is used to trigger the adjustable stiffness unit to adjust the stiffness according to the stiffness adjustment signal to a preset The stiffness adjustment step length and the stiffness adjustment period adjust the stiffness of itself; the stiffness adjustment signal is a stiffness increase signal or a stiffness decrease signal;

After sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the change of the vibration frequency and/or the displacement; wherein, the way of adjusting the stiffness adjustment signal is: Keep the stiffness adjustment signal unchanged, change the adjustment signal or stop sending the stiffness adjustment signal.

As an improvement of the above solution, the working state of the compressor includes: the compressor is in the stage of just starting up, the compressor is in the stage of just stopping operation, the compressor is in the stage of operating speed adjustment, and the compressor is in the stage of opening the door of the refrigerator.

As an improvement of the above solution, according to the current working state of the compressor, a preset stiffness adjustment signal is sent to the adjustable stiffness unit, specifically:

If the compressor is currently in the stage of just starting up, sending a stiffness increase signal to the adjustable stiffness unit;

Then, after the preset stiffness adjustment signal is sent to the stiffness adjustable unit, the stiffness adjustment signal is adjusted according to the change of the vibration frequency and/or the displacement, specifically:

After sending a stiffness increase signal to the stiffness-adjustable unit, judging the magnitude change of the vibration frequency in real time;

If the vibration frequency at the current moment is greater than the vibration frequency at the previous moment, continue to send the stiffness increase signal to the adjustable stiffness unit;

If the vibration frequency at the current moment is lower than the vibration frequency at the previous moment, then send a stiffness reduction signal to the adjustable stiffness unit;

If the vibration frequency remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

As an improvement of the above solution, according to the current working state of the compressor, a preset stiffness adjustment signal is sent to the adjustable stiffness unit, specifically:

If the compressor is currently in the stage of just stopping operation, send a stiffness reduction signal to the adjustable stiffness unit;

Then, after the preset stiffness adjustment signal is sent to the stiffness adjustable unit, the stiffness adjustment signal is adjusted according to the change of the vibration frequency and/or the displacement, specifically:

After sending a stiffness reduction signal to the stiffness-adjustable unit, judging the magnitude change of the vibration frequency in real time;

If the vibration frequency at the current moment is lower than the vibration frequency at the previous moment, continue to send the stiffness reduction signal to the adjustable stiffness unit;

If the vibration frequency at the current moment is greater than the vibration frequency at the previous moment, a stiffness increase signal is sent to the adjustable stiffness unit;

If the vibration frequency remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

As an improvement of the above solution, according to the current working state of the compressor, a preset stiffness adjustment signal is sent to the adjustable stiffness unit, specifically:

If the compressor is currently in the stage of adjusting the operating speed, sending a stiffness increase signal to the adjustable stiffness unit;

Then, after the preset stiffness adjustment signal is sent to the stiffness adjustable unit, the stiffness adjustment signal is adjusted according to the change of the vibration frequency and/or the displacement, specifically:

After sending a stiffness increase signal to the stiffness-adjustable unit, judging the size change of the displacement in real time;

If the displacement at the current moment is greater than the displacement at the previous moment, continue to send the stiffness increase signal to the adjustable stiffness unit;

If the displacement at the current moment is smaller than the displacement at the previous moment, send a stiffness reduction signal to the adjustable stiffness unit;

If the displacement remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

As an improvement of the above solution, according to the current working state of the compressor, a preset stiffness adjustment signal is sent to the adjustable stiffness unit, specifically:

If the compressor is currently in the stage of opening the door of the refrigerator, sending a stiffness reduction signal to the adjustable stiffness unit;

Then, after the preset stiffness adjustment signal is sent to the stiffness adjustable unit, the stiffness adjustment signal is adjusted according to the change of the vibration frequency and/or the displacement, specifically:

After sending a stiffness reduction signal to the stiffness-adjustable unit, judging the size change of the displacement in real time;

If the displacement at the current moment is greater than the displacement at the previous moment, continue to send the stiffness reduction signal to the adjustable stiffness unit;

If the displacement at the current moment is smaller than the displacement at the previous moment, a stiffness increase signal is sent to the adjustable stiffness unit;

If the displacement remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

The embodiment of the present invention also provides a vibration adjustment method for a compressor, which is applied to a refrigerator, and the refrigerator includes:

The compressor and the compressor pipeline connected to it;

The vibration adjustment system includes a mass unit and an adjustable stiffness unit; the mass unit and the adjustable stiffness unit are stacked and fixedly connected to at least one side of the compressor pipeline;

a vibration sensor, used to detect the vibration frequency of the compressor pipeline;

a displacement sensor for detecting the displacement of the mass unit;

The methods include:

After the refrigerator is powered on, obtain the current working state of the compressor;

Obtaining the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time;

According to the current working state of the compressor and the change of the vibration frequency and/or the displacement, adjust the stiffness of the adjustable stiffness unit so that the natural frequency of the vibration adjustment system is equal to or close to the the vibration frequency.

As an improvement to the above solution, the adjustment of the stiffness of the adjustable stiffness unit according to the current working state of the compressor and the change of the vibration frequency and/or the displacement specifically includes:

According to the current working state of the compressor, a preset stiffness adjustment signal is sent to the adjustable stiffness unit; the stiffness adjustment signal is used to trigger the adjustable stiffness unit to adjust the stiffness according to the stiffness adjustment signal to a preset The stiffness adjustment step length and the stiffness adjustment period adjust the stiffness of itself; the stiffness adjustment signal is a stiffness increase signal or a stiffness decrease signal;

After sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the change of the vibration frequency and/or the displacement; wherein, the way of adjusting the stiffness adjustment signal is: Keep the stiffness adjustment signal unchanged, change the adjustment signal or stop sending the stiffness adjustment signal.

As an improvement of the above solution, the working state of the compressor includes: the compressor is in the stage of just starting up, the compressor is in the stage of just stopping operation, the compressor is in the stage of operating speed adjustment, and the compressor is in the stage of opening the door of the refrigerator.

Compared with the prior art, the embodiment of the present invention discloses a vibration adjustment method for a refrigerator and a compressor. The refrigerator is provided with a vibration adjustment system including a mass unit and an adjustable stiffness unit, the mass unit and the adjustable stiffness unit are stacked and fixedly connected to at least one side of the compressor pipeline. After the refrigerator is powered on, obtain the current working state of the compressor, and obtain the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time, and then according to the current working state of the compressor, and The change of the vibration frequency and/or the displacement adjusts the stiffness of the adjustable stiffness unit so that the natural frequency of the vibration adjustment system is equal to or close to the vibration frequency. Using the technical means of the embodiment of the present invention, by setting a vibration adjustment system on the compressor pipeline, controlling the stiffness of the stiffness-adjustable unit in the vibration adjustment system to generate a certain natural frequency, thereby resonating with the compressor pipeline, absorbing The vibration energy of the compressor pipeline effectively reduces the vibration and noise of the compressor under different working conditions. Compared with the use of rubber shock absorbers in the prior art to buffer the vibration energy of the compressor pipeline, the present invention implements The technical means of the example can more effectively reduce the vibration of the compressor pipeline, reduce the noise generated by the vibration of the compressor, and greatly improve the user experience.

Description of drawings

Fig. 1 is a schematic diagram of a refrigerator compressor and its pipeline structure in the prior art;

Fig. 2 is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of the connection structure between the compressor and the vibration adjustment system in the embodiment of the present invention;

Fig. 4 is a schematic flowchart of the work performed by the controller in the first preferred implementation mode in the embodiment of the present invention;

Fig. 5 is a schematic flow chart of the work performed by the controller in the second preferred implementation mode in the embodiment of the present invention;

Fig. 6 is a schematic flow chart of the work performed by the controller in the start-up phase of the compressor in the embodiment of the present invention;

Fig. 7 is a schematic flow chart of the work performed by the controller in the stop phase of the compressor in the embodiment of the present invention;

Fig. 8 is a schematic flow chart of the work performed by the controller when the compressor is in the rotation speed adjustment stage in the embodiment of the present invention;

Fig. 9 is a schematic flowchart of the work performed by the controller when the compressor is in the refrigerator door opening stage in the embodiment of the present invention;

Fig. 10 is a schematic flowchart of a vibration adjustment method for a compressor provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to FIG. 2 , it is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention. An embodiment of the present invention provides a refrigerator 10, which includes a box body and a box door. The box body is provided with at least one storage room, such as a refrigerator room and/or a freezer room, for storing items that need to be kept fresh or frozen.

The refrigerator 10 also includes a refrigeration system for performing a refrigeration operation of the refrigerator. It should be noted that the refrigerator performs cooling operation through the refrigeration system, which provides cold energy to be transmitted to the storage chamber, so that the storage chamber is maintained at a constant low temperature state. Specifically, the refrigeration system of the refrigerator described in the embodiment of the present invention is composed of a compressor 11, a condenser, a dry filter, a capillary tube, and an evaporator. The working configuration of the refrigeration system includes a compression process, a condensation process, a throttling process and Evaporation process. The compressor 11 is connected with other devices through a compressor pipeline 12 and performs corresponding functions, wherein the compressor pipeline 12 includes an exhaust pipe and a return air pipe.

Specifically, the compression process is as follows: plug in the power cord of the refrigerator, and when there is a cooling demand for the cabinet, the compressor starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor and compressed into a high-temperature, The high-pressure superheated gas is discharged into the condenser; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser, the temperature continues to drop, and is gradually cooled to normal temperature and high-pressure saturated vapor, and further cooled to a saturated liquid. The temperature at this time is called the condensation temperature. The pressure of the refrigerant is almost constant during the whole condensation process; the throttling process is as follows: the saturated liquid of the refrigerant after being condensed passes through a dry filter to filter out moisture and impurities, and then flows into the capillary tube, through which the refrigerant is throttled and depressurized. It is wet vapor at normal temperature and low pressure; the evaporation process is: then it starts to absorb heat in the evaporator for vaporization, which not only reduces the temperature of the evaporator and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator returns to the compressor again, repeating the above process, transferring the heat in the refrigerator to the air outside the box, and realizing the purpose of refrigeration.

Further, the refrigerator 10 also includes a vibration adjustment system 13, which is used to adjust the vibration of the compressor system, so as to reduce the vibration noise of the compressor pipeline. The vibration adjustment system 13 includes a mass unit 131 and a stiffness adjustable unit 132 . The mass unit 131 is a mass block, and its mass is preset and fixed, which can be set according to the actual situation. The stiffness-adjustable unit 132 is a piezoelectric material with variable stiffness. The mass unit 131 and the adjustable stiffness unit 132 are stacked and fixedly connected to at least one side of the compressor pipeline 12 .

In a preferred implementation manner, see FIG. 3 , which is a schematic diagram of a connection structure between a compressor and a vibration adjustment system in an embodiment of the present invention. A group of mass units 131 and adjustable stiffness units 132 are respectively arranged on both sides of the compressor pipeline 12 . In the setting process, the stiffness-adjustable unit 132 is set on one side surface of the compressor pipeline 12 first, and then the mass unit 131 is set on the side surface of the stiffness-adjustable unit 132 away from the compressor pipeline 12, and the mass The unit 131 and the adjustable stiffness unit 132 are fixedly connected on the surface of the compressor pipeline through a fixing mechanism. The compressor pipeline 12 can be an exhaust pipe or an air return pipe, and of course, a vibration adjustment system 13 can also be provided on the exhaust pipe and the air return pipe respectively.

Described refrigerator 10 also comprises vibration sensor 14 and displacement sensor 15, and vibration sensor 14 is connected with compressor pipeline 12, for example is arranged on the surface of compressor pipeline 12, is used for detecting the vibration frequency of compressor pipeline 12; 15 is connected to the mass unit 131 , for example, is arranged on the surface of the mass unit 131 , and is used to detect the displacement of the mass unit 131 . As an example, taking the position of the mass unit 131 when the compressor pipeline 12 is in a static state as the initial point, when the refrigerator is running, the compressor pipeline 12 vibrates, driving the mass unit 131 to move, and the displacement sensor 15 can detect the mass unit 131. The displacement generated by the unit 131 relative to the initial point.

The refrigerator 10 also includes a controller 16, the controller 16 is respectively connected with the vibration adjustment system 13, the vibration sensor 14 and the displacement sensor 15 and performs information interaction, so as to obtain the vibration frequency and the vibration frequency of the compressor pipeline 12 detected by the vibration sensor 14. The displacement of the mass unit 131 detected by the displacement sensor 15 is used to control the vibration adjustment system 13 .

Specifically, refer to FIG. 4 , which is a structural schematic diagram of the door of the refrigerator in an open state in an embodiment of the present invention. The controller 16 is used to perform steps S11 to S13:

S11. After the refrigerator is powered on, obtain the current working state of the compressor;

S12. Obtain the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time;

S13. According to the current working state of the compressor and the change of the vibration frequency and/or the displacement, adjust the stiffness of the adjustable stiffness unit so that the natural frequency of the vibration adjustment system is equal to or close to at the vibration frequency.

The working principle of the vibration adjustment system 13 is: the mass unit 131 and the stiffness adjustable unit 132 form a vibration adjustment system with adjustable natural frequency, and the natural frequency of the system is f=K/m, where K refers to the stiffness adjustable unit The stiffness of 132, m refers to the quality of the mass unit 131. The natural frequency of the system is adjusted by changing the stiffness K. When the natural frequency f of the system is the same as or close to the vibration frequency of the compressor pipeline 12, the vibration adjustment system composed of the mass unit 131 and the adjustable stiffness unit 132 is compatible with the compressor pipeline. The circuit 12 generates resonance, thereby absorbing the vibration energy of the compressor pipeline 12 and reducing the vibration of the compressor pipeline 12 .

In the embodiment of the present invention, after the refrigerator is powered on, the controller 16 obtains the current working state of the compressor 11 in real time, and obtains the vibration frequency of the compressor pipeline 12 detected by the vibration sensor 14 and the vibration frequency detected by the displacement sensor 15 in real time. The displacement of the mass unit 131. The working state of the compressor 11 determines the vibration characteristics of the compressor pipeline 12 to a large extent, such as the change of vibration frequency, etc., considering the working state of the compressor 11, it is possible to better determine the stiffness adjustment of the stiffness adjustable unit 132 direction, combined with the vibration frequency of the compressor pipeline 12 and the displacement of the mass unit 131, comprehensively determine the stiffness adjustment direction of the stiffness adjustable unit 132, so as to send corresponding stiffness adjustment instructions to the stiffness adjustable unit 132 to adjust the stiffness adjustable unit The stiffness of 132 becomes larger, smaller or remains the same, so that the natural frequency of the vibration adjustment system 13 is equal to or close to the vibration frequency.

An embodiment of the present invention provides a refrigerator, which is provided with a vibration adjustment system including a mass unit and an adjustable stiffness unit, the mass unit and the adjustable stiffness unit are stacked and fixedly connected to the compressor pipeline at least one side. After the refrigerator is powered on, obtain the current working state of the compressor, and obtain the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time, and then according to the current working state of the compressor, and The change of the vibration frequency and/or the displacement adjusts the stiffness of the adjustable stiffness unit so that the natural frequency of the vibration adjustment system is equal to or close to the vibration frequency. Using the technical means of the embodiment of the present invention, by setting a vibration adjustment system on the compressor pipeline, controlling the stiffness of the stiffness-adjustable unit in the vibration adjustment system to generate a certain natural frequency, thereby resonating with the compressor pipeline, absorbing The vibration energy of the compressor pipeline effectively reduces the vibration and noise of the compressor under different working conditions. The technical means of the embodiments of the invention can more effectively reduce the vibration of the compressor pipeline, reduce the noise generated by the vibration of the compressor, and greatly improve the user experience.

As a preferred implementation, the embodiment of the present invention is further implemented on the basis of the above-mentioned embodiments, step S13, that is, according to the current working state of the compressor, and the change of the vibration frequency and/or the displacement , adjusting the stiffness of the adjustable stiffness unit, specifically including steps S131 and S132:

S131. Send a preset stiffness adjustment signal to the adjustable stiffness unit according to the current working state of the compressor; the stiffness adjustment signal is used to trigger the adjustable stiffness unit to follow the stiffness adjustment signal to preset The stiffness adjustment step length and the stiffness adjustment cycle are adjusted to adjust their own stiffness; the stiffness adjustment signal is a stiffness increase signal or a stiffness reduction signal;

S132. After sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the vibration frequency and/or the change of the displacement; wherein, the manner of adjusting the stiffness adjustment signal It is: keep the stiffness adjustment signal unchanged, change the adjustment signal or stop sending the stiffness adjustment signal.

Referring to FIG. 5 , it is a schematic structural diagram of a refrigerator provided in an embodiment of the present invention in a second preferred implementation manner. In the embodiment of the invention, the controller 16 obtains the current working state of the compressor 11 after the refrigerator is powered on, and determines the direction of adjusting the stiffness of the stiffness-adjustable unit 132 according to the current working state of the compressor, specifically, the stiffness becomes larger. Still the stiffness becomes smaller, so that a corresponding stiffness adjustment signal, specifically a stiffness increase signal or a stiffness decrease signal, is sent to the stiffness adjustable unit 132 .

Next, the controller 16 acquires the vibration frequency of the compressor pipeline 12 and the displacement of the mass unit 131 in real time, according to the change characteristics of the vibration frequency, or the change characteristics of the displacement, or the change characteristics of both the vibration frequency and the displacement , to determine whether to continue to output the stiffness adjustment signal or to change to output another stiffness adjustment signal to adjust the natural frequency of the vibration adjustment system 13, or to stop outputting the stiffness adjustment signal to maintain the natural frequency of the vibration adjustment system 13. change, so that the natural frequency of the vibration adjustment system 13 is close to the vibration frequency of the compressor pipeline 12 to achieve resonance.

It should be noted that, after receiving the stiffness adjustment signal, the adjustable stiffness unit 132 adjusts its own stiffness with a certain adjustment step and adjustment period according to the indication of the stiffness adjustment signal. As an example, the The preset stiffness adjustment step size is △K, and the adjustment period is 5s, then when the stiffness-adjustable unit 132 continues to receive the stiffness-increasing signal, the stiffness-adjustable unit 132 will adjust its current stiffness K every 5s to Increase △K so that the current stiffness becomes (K+△K); similarly, when the stiffness-adjustable unit 132 continues to receive the stiffness-decreasing signal, the stiffness-adjustable unit 132 changes its current stiffness K Decrease △K, so that the current stiffness becomes (K-△K), until the stiffness adjustable unit does not receive the stiffness adjustment signal.

By adopting the technical means of the embodiment of the present invention, the influence of the current working state of the compressor on the vibration characteristics of the compressor pipeline is considered, so that the stiffness adjustment direction of the adjustable stiffness unit is preliminarily determined according to the working state of the compressor, so that the stiffness adjustment The result of the natural frequency of the system obtained later can adapt to the change of the vibration frequency of the compressor pipeline more quickly, and then further fine-tune the stiffness of the stiffness-adjustable unit according to the vibration frequency or displacement of the compressor pipeline, so that the system The natural frequency of the compressor is similar to the vibration frequency of the compressor pipeline. The vibration adjustment system resonates with the compressor pipeline to absorb the vibration energy of the compressor pipeline, thereby effectively reducing the vibration and noise of the compressor under different working conditions.

In a specific implementation manner, the working state of the compressor includes: the compressor is in the stage of just starting operation, the compressor is in the stage of just stopping operation, the compressor is in the stage of operating speed adjustment, and the compressor is in the stage of opening the door of the refrigerator; wherein, The operation speed adjustment phase includes an operation speed increase phase and an operation speed reduction phase.

It can be understood that when the compressor 11 is in the above-mentioned working state, the operation of the compressor system is unstable, and the pressure fluctuations inside the compressor change significantly, causing the pressure in the pipeline to fluctuate, and the airflow speed to fluctuate, and then Cause pressure pulsation, the pressure pulsation will produce a pulsating excitation force on the pipeline, thereby exciting the pipeline for mechanical vibration, refrigerant pressure pulsation and compressor vibration will cause large vibration in the pipeline, and the vibration of the pipeline will be transmitted to the tank body, causing the box to vibrate and emit a noticeable buzzing noise. Therefore, for the above-mentioned working state of the compressor, special vibration adjustment control is required.

In the first preferred implementation manner, refer to FIG. 6 , which is a schematic flowchart of the work performed by the controller in the start-up phase of the compressor in the embodiment of the present invention. Step S131, that is, sending a preset stiffness adjustment signal to the stiffness adjustable unit according to the current working state of the compressor, specifically:

If the compressor is currently in the stage of just starting up, a stiffness increase signal is sent to the adjustable stiffness unit.

Then step S132, that is, after sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the vibration frequency and/or the change of the displacement, specifically:

After sending a stiffness increase signal to the stiffness-adjustable unit, judging the magnitude change of the vibration frequency in real time;

If the vibration frequency at the current moment is greater than the vibration frequency at the previous moment, continue to send the stiffness increase signal to the adjustable stiffness unit;

If the vibration frequency at the current moment is lower than the vibration frequency at the previous moment, then send a stiffness reduction signal to the adjustable stiffness unit;

If the vibration frequency remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

In the embodiment of the present invention, if the compressor is just starting up, this process is instantaneous, and the vibration of the compressor pipeline becomes more and more obvious, and the noise will become more and more obvious if it is not controlled. The controller 16 sends a stiffness increase signal to the stiffness-adjustable unit 132, so that the stiffness-adjustable unit 132 increases its own stiffness. Then, the controller 16 judges the variation characteristics of the vibration frequency of the compressor pipeline 12 in real time. If the compressor As the vibration frequency of the pipeline 12 continues to increase, the controller 16 continues to output a stiffness increase signal, so that the stiffness of the adjustable stiffness unit 132 increases, and the natural frequency f of the vibration adjustment system 13 also gradually increases, thereby absorbing the vibration of the compressor pipeline. vibration energy; if the vibration frequency of the compressor pipeline 12 begins to decrease, the controller 16 outputs a stiffness reduction signal, so that the stiffness of the stiffness adjustable unit 132 decreases, and the natural frequency f of the vibration adjustment system 13 also gradually decreases, thereby The vibration adjustment system 13 matches the resonance of the compressor pipeline 12, absorbs the vibration energy of the compressor pipeline, and reduces noise; if the vibration frequency of the compressor pipeline 12 remains unchanged, the controller 16 stops outputting the stiffness adjustment signal, Keeping the stiffness of the adjustable stiffness unit 132 constant, the vibration adjustment system 13 and the compressor pipeline 12 form a stable resonance.

In the second preferred implementation manner, refer to FIG. 7 , which is a schematic flow chart of the work performed by the controller when the compressor is in a stop phase in the embodiment of the present invention. Step S131, that is, sending a preset stiffness adjustment signal to the stiffness adjustable unit according to the current working state of the compressor, specifically:

If the compressor is currently in the stage of just stopping operation, send a stiffness reduction signal to the adjustable stiffness unit;

Then step S132, that is, after sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the vibration frequency and/or the change of the displacement, specifically:

After sending a stiffness reduction signal to the stiffness-adjustable unit, judging the magnitude change of the vibration frequency in real time;

If the vibration frequency at the current moment is lower than the vibration frequency at the previous moment, continue to send the stiffness reduction signal to the adjustable stiffness unit;

If the vibration frequency at the current moment is greater than the vibration frequency at the previous moment, a stiffness increase signal is sent to the adjustable stiffness unit;

If the vibration frequency remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

In the embodiment of the present invention, if the compressor is in the shutdown stage, this process is instantaneous, and the vibration of the compressor pipeline gradually decreases. If no control is performed, the vibration adjustment system 13 does not match the resonance of the compressor pipeline. There will still be noise in the process. The controller 16 sends a stiffness reduction signal to the stiffness-adjustable unit 132, so that the stiffness-adjustable unit 132 reduces its own stiffness. Then, the controller 16 judges the variation characteristics of the vibration frequency of the compressor pipeline 12 in real time. If the compressor When the vibration frequency of the pipeline 12 decreases, the controller 16 continues to output the stiffness reduction signal, so that the stiffness of the adjustable stiffness unit 132 decreases, and the natural frequency f of the vibration adjustment system 13 also gradually decreases, so that the vibration adjustment system 13 and The resonance matching of the compressor pipeline 12 absorbs the vibration energy of the compressor pipeline and reduces noise; if the vibration frequency of the compressor pipeline 12 starts to increase, the controller 16 outputs a stiffness increase signal to make the stiffness adjustable unit As the stiffness of 132 increases, the natural frequency f of the vibration adjustment system 13 also gradually increases, thereby absorbing the vibration energy of the compressor pipeline and reducing noise; if the vibration frequency of the compressor pipeline 12 remains unchanged, the controller 16 Stop outputting the stiffness adjustment signal, keep the stiffness of the adjustable stiffness unit 132 unchanged, and the vibration adjustment system 13 and the compressor pipeline 12 form a stable resonance.

In the third preferred implementation manner, refer to FIG. 8 , which is a schematic flow chart of the work performed by the controller when the compressor is in the rotation speed adjustment stage in the embodiment of the present invention. Step S131, that is, sending a preset stiffness adjustment signal to the stiffness adjustable unit according to the current working state of the compressor, specifically:

If the compressor is currently in the stage of adjusting the operating speed, sending a stiffness increase signal to the adjustable stiffness unit;

Then step S132, that is, after sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the vibration frequency and/or the change of the displacement, specifically:

After sending a stiffness increase signal to the stiffness-adjustable unit, judging the size change of the displacement in real time;

If the displacement at the current moment is greater than the displacement at the previous moment, continue to send the stiffness increase signal to the adjustable stiffness unit;

If the displacement at the current moment is smaller than the displacement at the previous moment, send a stiffness reduction signal to the adjustable stiffness unit;

If the displacement remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

In the embodiment of the present invention, the compressor will adjust its operating speed according to the actual operating requirements during operation. If the compressor is in the speed adjustment stage, including speed increase and speed reduction, the vibration of the compressor pipeline will occur at this time. If there is no control, there will be obvious noise in the process. The controller 16 sends a stiffness increase signal to the stiffness-adjustable unit 132, so that the stiffness-adjustable unit 132 increases its own stiffness. Then, the controller 16 judges the variation characteristics of the displacement of the mass unit 131 in real time. If the displacement of the mass unit 131 If it continues to increase, the controller 16 will continue to output the stiffness increasing signal, so that the stiffness of the adjustable stiffness unit 132 will increase, and the natural frequency f of the vibration adjustment system 13 will also gradually increase, thereby absorbing the vibration energy of the compressor pipeline and reducing noise If the displacement of the mass unit 131 starts to decrease, the controller 16 outputs a stiffness reduction signal, so that the stiffness of the adjustable stiffness unit 132 decreases, and the natural frequency f of the vibration adjustment system 13 also gradually decreases, so that the vibration adjustment system 13 and The resonance matching of the compressor pipeline 12 absorbs the vibration energy of the compressor pipeline and reduces noise; if the displacement of the mass unit 131 remains unchanged, the controller 16 stops outputting the stiffness adjustment signal to maintain the stiffness of the stiffness adjustable unit 132 Invariably, the vibration adjustment system 13 forms a stable resonance with the compressor line 12 .

It can be understood that the vibration frequency of the compressor pipeline has a certain linear relationship with the displacement of the mass unit. When the compressor is currently in the stage of operating speed adjustment, the vibration frequency of the compressor pipeline can also be detected to realize the stiffness adjustment. Stiffness adjustment of the adjustable unit.

Specifically, after sending the stiffness increase signal to the adjustable stiffness unit if the compressor is currently in the running speed adjustment stage, the step S132, that is, sending the signal to the adjustable stiffness unit After the preset stiffness adjustment signal is adjusted, the stiffness adjustment signal is adjusted according to the change of the vibration frequency and/or the displacement, specifically:

After sending a stiffness increase signal to the stiffness-adjustable unit, judging the magnitude change of the vibration frequency in real time;

If the vibration frequency at the current moment is greater than the vibration frequency at the previous moment, continue to send the stiffness increase signal to the adjustable stiffness unit;

If the vibration frequency at the current moment is lower than the vibration frequency at the previous moment, then send a stiffness reduction signal to the adjustable stiffness unit;

If the vibration frequency remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

In the fourth preferred implementation mode, refer to FIG. 9 , which is a schematic flow chart of the work performed by the controller when the compressor is in the door-opening stage of the refrigerator in the embodiment of the present invention. Step S131, that is, sending a preset stiffness adjustment signal to the stiffness adjustable unit according to the current working state of the compressor, specifically:

If the compressor is currently in the stage of opening the door of the refrigerator, sending a stiffness reduction signal to the adjustable stiffness unit;

Then step S132, that is, after sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the vibration frequency and/or the change of the displacement, specifically:

After sending a stiffness reduction signal to the stiffness-adjustable unit, judging the size change of the displacement in real time;

If the displacement at the current moment is greater than the displacement at the previous moment, continue to send the stiffness reduction signal to the adjustable stiffness unit;

If the displacement at the current moment is smaller than the displacement at the previous moment, a stiffness increase signal is sent to the adjustable stiffness unit;

If the displacement remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

In the embodiment of the present invention, if the user opens the door of the refrigerator to access items during the operation of the compressor, the operating parameters of the compressor will also change significantly at this time. If no control is performed, there will be obvious noise in the process. The controller 16 sends a stiffness reduction signal to the stiffness-adjustable unit 132, so that the stiffness-adjustable unit 132 reduces its own stiffness. Then, the controller 16 judges the variation characteristics of the displacement of the mass unit 131 in real time. If the displacement of the mass unit 131 decreases, the controller 16 continues to output the stiffness reduction signal, so that the stiffness of the adjustable stiffness unit 132 decreases, and the natural frequency f of the vibration adjustment system 13 also gradually decreases, so that the vibration adjustment system 13 and the compressor pipeline 12 Resonance matching absorbs the vibration energy of the compressor pipeline and reduces noise; if the displacement of the mass unit 131 begins to increase, the controller 16 outputs a stiffness increase signal to increase the stiffness of the stiffness-adjustable unit 132, and the vibration adjustment system The natural frequency f of 13 also gradually increases, thereby absorbing the vibration energy of the compressor pipeline and reducing noise; if the displacement of the mass unit 131 remains unchanged, the controller 16 stops outputting the stiffness adjustment signal to maintain the stiffness adjustable unit 132 The stiffness remains unchanged, and the vibration adjustment system 13 and the compressor pipeline 12 form a stable resonance.

It can be understood that when the compressor is currently in the refrigerator door opening stage, the stiffness adjustment of the stiffness-adjustable unit can also be realized by detecting the vibration frequency of the compressor pipeline.

Specifically, after sending a stiffness reduction signal to the adjustable stiffness unit if the compressor is currently in the stage of opening the door of the refrigerator, the step S132, that is, sending a preset signal to the adjustable stiffness unit After the stiffness adjustment signal, according to the change of the vibration frequency and/or the displacement, adjust the stiffness adjustment signal, specifically:

After sending a stiffness reduction signal to the stiffness-adjustable unit, judging the magnitude change of the vibration frequency in real time;

If the vibration frequency at the current moment is greater than the vibration frequency at the previous moment, continue to send the stiffness reduction signal to the adjustable stiffness unit;

If the vibration frequency at the current moment is lower than the vibration frequency at the previous moment, then send a stiffness increase signal to the adjustable stiffness unit;

If the vibration frequency remains unchanged at the current moment, stop sending the stiffness adjustment signal to the stiffness adjustable unit.

By adopting the technical means of the embodiment of the present invention, when the compressor is in different working states, the stiffness adjustment of the adjustable stiffness unit can be realized in a targeted manner according to the different working states of the compressor, so as to adjust the vibration set on the compressor pipeline. Adjust the natural frequency of the system, so that the natural frequency of the vibration adjustment system is similar to the vibration frequency of the compressor pipeline, so that the vibration adjustment system and the compressor pipeline can resonate, absorb the vibration energy of the compressor pipeline, and effectively reduce the The vibration and noise of the compressor under different working conditions provide users with a good experience.

Referring to FIG. 10 , it is a schematic flow chart of a compressor vibration adjustment method provided by an embodiment of the present invention. An embodiment of the present invention also provides a vibration adjustment method for a compressor, which is applied to a refrigerator, and the refrigerator includes:

The compressor and the compressor pipeline connected to it;

The vibration adjustment system includes a mass unit and an adjustable stiffness unit; the mass unit and the adjustable stiffness unit are stacked and fixedly connected to at least one side of the compressor pipeline;

a vibration sensor, used to detect the vibration frequency of the compressor pipeline;

a displacement sensor for detecting the displacement of the mass unit;

The vibration adjustment method of the compressor includes steps S21 to S23:

S21. After the refrigerator is powered on, obtain the current working state of the compressor;

S22. Obtain the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time;

S23. According to the current working state of the compressor and the change of the vibration frequency and/or the displacement, adjust the stiffness of the adjustable stiffness unit so that the natural frequency of the vibration adjustment system is equal to or close to at the vibration frequency.

Using the technical means of the embodiment of the present invention, by setting a vibration adjustment system on the compressor pipeline, controlling the stiffness of the stiffness-adjustable unit in the vibration adjustment system to generate a certain natural frequency, thereby resonating with the compressor pipeline, absorbing The vibration energy of the compressor pipeline effectively reduces the vibration and noise of the compressor under different working conditions. Compared with the use of rubber shock absorbers in the prior art to buffer the vibration energy of the compressor pipeline, the present invention implements The technical means of the example can more effectively reduce the vibration of the compressor pipeline, reduce the noise generated by the vibration of the compressor, and greatly improve the user experience.

As a preferred implementation, step S23, that is, adjusting the stiffness of the adjustable stiffness unit according to the current working state of the compressor and the change of the vibration frequency and/or the displacement, specifically includes the steps S231 and S232:

S231. Send a preset stiffness adjustment signal to the adjustable stiffness unit according to the current working state of the compressor; the stiffness adjustment signal is used to trigger the adjustable stiffness unit to follow the stiffness adjustment signal to preset The stiffness adjustment step length and the stiffness adjustment cycle are adjusted to adjust their own stiffness; the stiffness adjustment signal is a stiffness increase signal or a stiffness reduction signal;

S232. After sending the preset stiffness adjustment signal to the stiffness adjustable unit, adjust the stiffness adjustment signal according to the change of the vibration frequency and/or the displacement; wherein, the manner of adjusting the stiffness adjustment signal It is: keep the stiffness adjustment signal unchanged, change the adjustment signal or stop sending the stiffness adjustment signal.

Preferably, the working state of the compressor includes: the compressor is in the stage of just starting up, the compressor is in the stage of just stopping operation, the compressor is in the stage of operating speed adjustment, and the compressor is in the stage of opening the door of the refrigerator.

It should be noted that the method for adjusting the vibration of a compressor provided in the embodiment of the present invention is the same as all the process steps performed by the controller of the refrigerator in the above embodiment, and the working principles and beneficial effects of the two correspond one by one. Therefore no further details.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

Claims (10)

1. A refrigerator, characterized by comprising:

the compressor is connected with a compressor pipeline;

the vibration adjusting system comprises a mass unit and a rigidity adjustable unit; the mass unit and the rigidity adjustable unit are arranged in a stacked mode and fixedly connected to at least one side of the compressor pipeline;

the vibration sensor is used for detecting the vibration frequency of the compressor pipeline;

a displacement sensor for detecting a displacement of the mass unit;

a controller to:

after the refrigerator is powered on, acquiring the current working state of the compressor;

acquiring the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time;

and adjusting the rigidity of the rigidity adjustable unit according to the current working state of the compressor and the change of the vibration frequency and/or the displacement so as to enable the natural frequency of the vibration adjusting system to be equal to or approximate to the vibration frequency.

2. The refrigerator according to claim 1, wherein the adjusting the stiffness of the stiffness-adjustable unit according to the current operating state of the compressor and the change in the vibration frequency and/or the displacement comprises:

sending a preset rigidity adjusting signal to the rigidity adjusting unit according to the current working state of the compressor; the rigidity adjusting signal is used for triggering the rigidity adjusting unit to adjust the rigidity of the rigidity adjusting unit according to the rigidity adjusting signal by a preset rigidity adjusting step length and a preset rigidity adjusting period; the rigidity adjusting signal is a rigidity increasing signal or a rigidity decreasing signal;

after sending a preset stiffness adjusting signal to the stiffness adjustable unit, adjusting the stiffness adjusting signal according to the change of the vibration frequency and/or the displacement; wherein the stiffness adjustment signal is adjusted in a manner that: keeping the stiffness adjustment signal unchanged, changing the adjustment signal or stopping sending the stiffness adjustment signal.

3. The refrigerator as claimed in claim 2, wherein the operating state of the compressor includes: the compressor is in the stage of just starting operation, the compressor is in the stage of just stopping operation, the compressor is in the stage of adjusting the running rotating speed, and the compressor is in the stage of opening the door of the refrigerator.

4. The refrigerator according to claim 3, wherein the sending of a preset stiffness adjustment signal to the stiffness adjustable unit according to the current operating state of the compressor is specifically:

if the compressor is currently in a just-started operation stage, sending a rigidity increasing signal to the rigidity adjustable unit;

then, after sending a preset stiffness adjustment signal to the stiffness adjustable unit, adjusting the stiffness adjustment signal according to the change of the vibration frequency and/or the displacement, specifically:

after sending a rigidity increasing signal to the rigidity adjustable unit, judging the change of the vibration frequency in real time;

if the vibration frequency at the current moment is greater than the vibration frequency at the last moment, continuing to send the rigidity increasing signal to the rigidity adjustable unit;

if the vibration frequency at the current moment is less than the vibration frequency at the previous moment, sending a rigidity reducing signal to the rigidity adjustable unit;

and if the vibration frequency is kept unchanged at the current moment, stopping sending the rigidity adjusting signal to the rigidity adjusting unit.

5. The refrigerator according to claim 3, wherein the sending of a preset stiffness adjustment signal to the stiffness adjustable unit according to the current operating state of the compressor is specifically:

if the compressor is currently in a just-stopped operation stage, sending a rigidity reducing signal to the rigidity adjustable unit;

then, after sending a preset stiffness adjustment signal to the stiffness adjustable unit, adjusting the stiffness adjustment signal according to the change of the vibration frequency and/or the displacement, specifically:

after sending a rigidity reducing signal to the rigidity adjustable unit, judging the change of the vibration frequency in real time;

if the vibration frequency at the current moment is smaller than the vibration frequency at the previous moment, the rigidity reducing signal is continuously sent to the rigidity adjustable unit;

if the vibration frequency at the current moment is greater than the vibration frequency at the last moment, sending a rigidity increasing signal to the rigidity adjustable unit;

and if the vibration frequency is kept unchanged at the current moment, stopping sending the rigidity adjusting signal to the rigidity adjusting unit.

6. The refrigerator according to claim 3, wherein the sending of a preset stiffness adjustment signal to the stiffness adjustable unit according to the current operating state of the compressor is specifically:

if the compressor is currently in the operation rotating speed adjusting stage, sending a rigidity increasing signal to the rigidity adjusting unit;

then, after sending a preset stiffness adjustment signal to the stiffness adjustable unit, adjusting the stiffness adjustment signal according to the change of the vibration frequency and/or the displacement, specifically:

after sending a rigidity increasing signal to the rigidity adjustable unit, judging the size change of the displacement in real time;

if the displacement at the current moment is larger than the displacement at the previous moment, continuously sending the rigidity increasing signal to the rigidity adjustable unit;

if the displacement at the current moment is smaller than that at the previous moment, sending a rigidity reducing signal to the rigidity adjustable unit;

and if the displacement at the current moment is kept unchanged, stopping sending the rigidity adjusting signal to the rigidity adjusting unit.

7. The refrigerator according to claim 3, wherein the sending of a preset stiffness adjustment signal to the stiffness adjustable unit according to the current operating state of the compressor is specifically:

if the compressor is currently in the stage of opening the door of the refrigerator, sending a rigidity reducing signal to the rigidity adjustable unit;

then, after sending a preset stiffness adjustment signal to the stiffness adjustable unit, adjusting the stiffness adjustment signal according to the change of the vibration frequency and/or the displacement, specifically:

after sending a rigidity reducing signal to the rigidity adjustable unit, judging the size change of the displacement in real time;

if the displacement at the current moment is larger than the displacement at the previous moment, the rigidity reducing signal is continuously sent to the rigidity adjustable unit;

if the displacement at the current moment is smaller than the displacement at the previous moment, sending a rigidity increasing signal to the rigidity adjustable unit;

and if the displacement at the current moment is kept unchanged, stopping sending the rigidity adjusting signal to the rigidity adjusting unit.

8. A vibration adjusting method of a compressor is characterized by being applied to a refrigerator, and the refrigerator comprises the following steps:

the compressor is connected with a compressor pipeline;

the vibration adjusting system comprises a mass unit and a rigidity adjustable unit; the mass unit and the rigidity adjustable unit are arranged in a stacked mode and fixedly connected to at least one side of the compressor pipeline;

the vibration sensor is used for detecting the vibration frequency of the compressor pipeline;

a displacement sensor for detecting a displacement of the mass unit;

the method comprises the following steps:

after the refrigerator is powered on, acquiring the current working state of the compressor;

acquiring the vibration frequency of the compressor pipeline and/or the displacement of the mass unit in real time;

and adjusting the rigidity of the rigidity adjustable unit according to the current working state of the compressor and the change of the vibration frequency and/or the displacement so as to enable the natural frequency of the vibration adjusting system to be equal to or approximate to the vibration frequency.

9. The vibration adjusting method for compressor according to claim 8, wherein the adjusting the stiffness of the stiffness-adjustable unit according to the current operating state of the compressor and the change of the vibration frequency and/or the displacement comprises:

sending a preset rigidity adjusting signal to the rigidity adjusting unit according to the current working state of the compressor; the rigidity adjusting signal is used for triggering the rigidity adjusting unit to adjust the rigidity of the rigidity adjusting unit according to the rigidity adjusting signal by a preset rigidity adjusting step length and a preset rigidity adjusting period; the rigidity adjusting signal is a rigidity increasing signal or a rigidity decreasing signal;

after a preset rigidity adjusting signal is sent to the rigidity adjustable unit, the rigidity adjusting signal is adjusted according to the vibration frequency and/or the change of the displacement; wherein the stiffness adjustment signal is adjusted in a manner that: keeping the stiffness adjustment signal unchanged, changing the adjustment signal or stopping sending the stiffness adjustment signal.

10. A vibration adjusting method of a compressor as set forth in claim 9, wherein the operation state of the compressor includes: the compressor is in the stage of just starting operation, the compressor is in the stage of just stopping operation, the compressor is in the stage of adjusting the running rotating speed, and the compressor is in the stage of opening the door of the refrigerator.

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