CN112737460A

CN112737460A - Control method of compressor assembly, compressor assembly and refrigeration equipment

Info

Publication number: CN112737460A
Application number: CN202011587333.0A
Authority: CN
Inventors: 李太龙
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-04-30
Anticipated expiration: 2040-12-28
Also published as: CN112737460B

Abstract

The invention provides a control method of a compressor assembly, the compressor assembly and refrigeration equipment. The compressor assembly comprises a compressor and a wave limiting filter, and the control method comprises the following steps: acquiring the working frequency of a compressor; determining a first current harmonic signal output by the wave limiting filter according to the working frequency; and adjusting the driving current of the compressor according to the first current harmonic signal. According to the method and the device, the first current harmonic signal of the wave limiting filter is determined through the working frequency, the driving current of the compressor is correspondingly adjusted through the first current harmonic signal, so that the adjusted driving current can inhibit the harmonic vibration of the compressor under the high-frequency working condition from the angle of the compressor load torque harmonic characteristic corresponding to the working frequency of the compressor, and therefore the high-frequency harmonic vibration of a system caused by the compressor load torque harmonic characteristic is reduced, and the noise is reduced. And then realize promoting compressor job stabilization nature, reduce the compressor noise, promote the technical effect that the user used and experienced.

Description

Control method of compressor assembly, compressor assembly and refrigeration equipment

Technical Field

The invention relates to the technical field of compressors, in particular to a control method of a compressor assembly, the compressor assembly, refrigeration equipment and a readable storage medium.

Background

In the related art, the problem of vibration noise of the compressor device has become a hot spot of attention of users. Therefore, higher and higher requirements on vibration reduction and noise reduction are provided in the research and development design of the compressor, the rotary compressor is the focus of problems, and particularly the problem of noise of an air conditioning system caused by vibration of the single-rotor compressor is a problem which is directly faced by air conditioners and compressor manufacturers.

Therefore, how to design a control method for reducing vibration noise of a compressor is an urgent technical problem to be solved.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a control method of a compressor assembly.

A second aspect of the present invention is directed to a compressor assembly.

A third aspect of the invention provides a refrigeration apparatus.

A fourth aspect of the invention is directed to a readable storage medium.

In view of the above, a first aspect of the present invention provides a control method for a compressor assembly, the compressor assembly including a compressor and a wave limiting filter, the control method including: acquiring the working frequency of a compressor; determining a first current harmonic signal output by the wave limiting filter according to the working frequency; and adjusting the driving current of the compressor according to the first current harmonic signal.

In the technical scheme, the control method of the compressor assembly is used for controlling the operation of the compressor assembly. The compressor assembly comprises a compressor and a wave limiting filter, the wave limiting filter is connected with the compressor, in the working process, the control method firstly obtains the working frequency of the compressor, then the compressor determines a first current harmonic signal correspondingly output by the wave limiting filter according to the working frequency, and finally the driving current of the compressor is adjusted according to the first current harmonic signal after the first current harmonic signal is determined so as to correspondingly adjust the working state of the compressor.

The compressor drives the rolling piston to rotate through the eccentric crankshaft in the working process, and when the cylinder compresses, the gas pressure in the compression cavity changes according to a periodic rule, so that a periodically-changed torque pulse is generated between the cylinder and the rotating crankshaft. Specifically, in the electric control process, the harmonic pulsation of the high-frequency band, the bandwidth of the current loop and the speed loop of the frequency converter are relatively low, and the high-frequency periodic load torque signal cannot be tracked well.

According to the method and the device, the first current harmonic signal of the wave limiting filter is determined through the working frequency, the driving current of the compressor is correspondingly adjusted through the first current harmonic signal, so that the adjusted driving current can inhibit the harmonic vibration of the compressor under the high-frequency working condition from the angle of the compressor load torque harmonic characteristic corresponding to the working frequency of the compressor, and therefore the high-frequency harmonic vibration of a system caused by the compressor load torque harmonic characteristic is reduced, and the noise is reduced. Furthermore, the high-frequency harmonic vibration of the compressor is effectively inhibited at an electric control angle, and meanwhile, an optimal control method is realized, so that the working stability of the compressor is improved, the noise of the compressor is reduced, and the technical effect of the use experience of a user is improved.

In addition, the control method of the compressor assembly provided by the invention can also have the following additional technical characteristics:

in the above technical solution, before the step of determining the first current harmonic signal output by the wave-limiting filter according to the operating frequency, the control method further includes: respectively acquiring working parameters of a compressor at a plurality of preset working frequencies; determining a plurality of harmonic orders at each predetermined operating frequency; calculating the harmonic amplitude corresponding to each harmonic order according to the working parameters; determining a target harmonic order meeting a preset condition from the multiple harmonic orders according to a comparison result of the harmonic amplitude and a pre-stored standard harmonic amplitude; the predetermined operating frequency and the target harmonic order association are stored as a target table.

In this technical solution, a step of determining an output voltage of a proportional resonant regulator according to an operating frequency is explained. Specifically, the compressor is controlled to operate at a plurality of preset operating frequencies for a preset time, so that the operating parameters of the compressor are respectively obtained at the plurality of preset operating frequencies, and a plurality of harmonic orders corresponding to the compressor at each preset operating frequency are determined.

After a plurality of harmonic orders under each preset working frequency are determined and working parameters under each preset working frequency are obtained, the harmonic amplitude corresponding to each harmonic order of the compressor under the preset working frequency is calculated according to the working parameters, and the harmonic vibration state of the compressor under the preset working frequency is reflected through the harmonic amplitude.

On the basis, the system is prestored with standard harmonic amplitudes of the compressor at various preset working frequencies, and the standard harmonic amplitudes are used for reflecting the harmonic vibration state of the compressor when the compressor stably works at the preset working frequencies. Therefore, the harmonic amplitude obtained through calculation is compared with the pre-stored standard harmonic amplitude, and the harmonic amplitude of which harmonic order in the multiple harmonic orders of the compressor under the preset working frequency can meet the standard harmonic vibration and the harmonic amplitude of which harmonic order does not meet the standard harmonic vibration can be determined according to the comparison result. Thereby determining a target harmonic order that satisfies a preset condition that the standard harmonic vibration is not satisfied.

Finally, the predetermined operating frequencies and the target harmonics corresponding thereto are stored in association therewith to construct a target table. The target table is a two-dimensional table in which specific harmonic vibration amplitudes of which harmonic order do not satisfy the standard harmonic vibration when the compressor is operated at each predetermined operating frequency are described.

By counting and establishing a target harmonic order comparison table of the compressor under each target working frequency in advance, when the control method is used for controlling the proportional resonant regulator and the compressor to work subsequently, the corresponding target harmonic order can be directly called according to the target table through the working frequency of the current compressor so as to form self-adaptive identification of the harmonic order of which the compressor does not meet the vibration standard, the frequent calculation of the harmonic amplitude of each harmonic order of the compressor is avoided when the compressor is controlled to work for multiple times, the control flow of the control method is simplified, the calculation amount of the control process is reduced, and the influence of instantaneous extreme data on the control process is eliminated. And further, the control method for optimizing the compressor assembly is realized, the system processing load is reduced, the control efficiency is improved, the working reliability and stability of the compressor are improved, and the technical effects of reducing the vibration noise of the compressor are achieved.

When the target table is constructed, the working parameters under each preset working frequency can be sampled for multiple times, so that the stability and reliability of data are ensured through the average value of the multiple sampling, and the specific sampling times are not limited.

In addition, the control method can control the compressor to repeatedly execute the specific control step of establishing the target table after a certain time interval, so that the two-dimensional comparison table of the preset working frequency and the target harmonic order is updated at a fixed time interval, the target table is ensured to be matched with the actual working condition of the compressor, the accuracy and the reliability of the control method are further improved, and the working noise of the compressor is reduced.

In any of the above technical solutions, the step of determining the first current harmonic signal output by the wave-limiting filter according to the operating frequency specifically includes: inquiring a corresponding target harmonic order in a target table according to the working frequency; respectively calculating a second current harmonic signal corresponding to each target harmonic order; determining the second current harmonic signal as the first current harmonic signal based on the number of the second current harmonic signals being one; the first current harmonic signal is determined from the plurality of second current harmonic signals based on the number of second current harmonic signals being a plurality.

In the technical scheme, the method explains how to determine the first current harmonic signal exhaled by the wave limiting filter according to the working frequency. Specifically, the target harmonic order corresponding to the operating frequency, that is, the harmonic order not meeting the correspondence of the vibration table pointer, is searched from the target table according to the operating frequency. And then respectively calculating a second current harmonic signal value corresponding to each target harmonic order, and calculating a corresponding first current harmonic signal according to the second current harmonic signal value. Therefore, the wave limiting filter can be matched with a prestored target table to finish the self-adaptive identification of the first current harmonic signal.

In particular, the second current harmonic signal corresponds to a group module in the wave limiting filter, and the second current harmonic signal simultaneously corresponds to a harmonic order that does not meet the vibration criteria. In the process of calculating the first current harmonic signal according to the second current harmonic signal, if a single second current harmonic signal is determined, the second current harmonic signal is taken as the first current harmonic signal. And if a plurality of current harmonic signals are determined, summing the determined plurality of second current harmonic signals to obtain a first current harmonic signal. The first current harmonic signal is a final adjusting signal, the technical scheme specifically explains how the wave limiting filter completes self-adaptive harmonic suppression and automatic compensation control, the reliability and accuracy of the self-adaptive harmonic suppression can be improved by calling a target table to calculate the first current harmonic signal, meanwhile, the calculated amount and the system processing burden are reduced, further, the control method of the compressor assembly is optimized, the high-frequency vibration noise of the compressor is reduced, and the technical effect of the user experience is improved.

In any of the above technical solutions, the compressor assembly further includes a speed regulator, and the step of adjusting the driving current of the compressor according to the first current harmonic signal specifically includes: acquiring the output current of the speed regulator; determining a harmonic current from the first current harmonic signal; determining a target regulating current according to the difference between the output current and the harmonic current; the driving current is regulated to a target regulation current.

In the technical scheme, the compressor assembly is also provided with a speed regulator, the speed regulator is connected with the compressor, and the speed regulator can adjust the rotating speed of the compressor through an electric control signal in work. On the basis, the wave limiting filter is connected with the speed regulator in parallel, the wave limiting filter obtains an output current value output by the speed regulator when outputting a first current harmonic signal in a self-adaptive mode according to the working frequency, then the first current harmonic signal is compensated to the output current value to obtain a target regulating current for completing current compensation, and then the speed regulator or other power supply elements are controlled to regulate the driving current of the compressor to the target regulating current. Through setting up the speed regulator with the cooperation work of wave limiting filter, make wave limiting filter can combine speed regulator to realize self-adaptation harmonic suppression and automatic compensation control to accomplish the automatic suppression of high frequency harmonic vibration in automatically controlled angle, and then realize reducing compressor work noise, prolong compressor life's technological effect.

In any of the above technical solutions, the step of adjusting the driving current to the target adjustment current specifically includes: calculating a compensation voltage according to the target regulating current; the driving voltage of the compressor is compensated by the compensation voltage.

In this technical solution, a way of adjusting the drive current to the target adjustment current is defined. Specifically, after the target adjusting current is determined, the corresponding compensation voltage is calculated according to the difference value between the target adjusting current and the current driving current, and then the compensation voltage is compensated to the driving voltage of the compressor to realize the corresponding adjustment of the driving current of the compressor, so that the high-frequency harmonic vibration of the compressor is suppressed by adjusting the driving current of the compressor, and the high-frequency vibration noise of the compressor is reduced.

In any of the above technical solutions, the step of compensating the driving voltage of the compressor by the compensation voltage specifically includes: determining a voltage vector value according to the compensation voltage; the voltage vector value is superimposed on the voltage vector of the drive voltage.

In this solution, it is defined how to compensate the voltage for the driving voltage of the compressor. Specifically, after the compensation voltage is determined, each voltage vector value corresponding to the compensation voltage is determined according to the compensation voltage, and then each voltage vector value is correspondingly superposed on each voltage vector of the driving voltage to obtain the driving voltage after compensation is completed. This compensating voltage is provided by the proportion resonance regulator, and the proportion resonance regulator can be according to the preliminary output voltage of target table inquiry out corresponding, after the amplitude limiting attenuation coefficient execution that restricts according to this application corresponds the amplitude limiting strategy, and the output voltage of final gained can avoid the compressor on the one hand to appear unusual high frequency vibration in the course of the work, reduces compressor work noise, and on the other hand can avoid the excessive compensation driving voltage of proportion resonance regulator, ensures that the compressor can be in the long-term stable work of the basis of making an uproar of falling. Therefore, the control method for optimizing the compressor assembly is realized, the reliability and the control accuracy of the control method are improved, the vibration noise of the compressor is reduced from the aspect of electric control, and the technical effect of user experience is improved.

In any of the above technical solutions, the working parameter includes a working current, and the step of calculating the harmonic amplitude corresponding to each harmonic order according to the working parameter specifically includes: calculating a current error corresponding to each harmonic order according to the working current; and calculating the harmonic amplitude corresponding to each harmonic order according to the current error.

In the technical scheme, the steps of calculating the harmonic amplitude corresponding to each harmonic order according to the working parameters are explained. Specifically, a current error of the compressor at each harmonic order is calculated according to the working current, and then a harmonic amplitude of the compressor at each harmonic order is calculated according to the current error.

The control method comprises the steps of sampling and acquiring phase current values of the compressor in real time, carrying out filtering pretreatment on the sampled phase current values, and filtering high-frequency noise signals. The three-phase current value of the motor meets the relation that the sum of the three-phase current values is equal to zero, so that any two-phase current value is obtained, and the third-phase current value can be calculated.

On the basis, the working current i is calculated by the following formula_s：

Theta is the rotation angle of the motor, and the current error is calculated by the following formula

Represents the direct current component of the operating current,

representing the magnitude of the nth harmonic cosine component of the fluctuating component of the operating current,

representing the amplitude of the nth harmonic sinusoidal component of the fluctuating component of the operating current.

Storing the current error for a period of time yields:

where N corresponds to the sample value at the current sample time.

Specifically, the process of calculating the harmonic amplitude corresponding to each harmonic order according to the current error is as follows:

based on the acquired current error, the following trigonometric operations are performed:

the cosine component amplitude of the n-th harmonic of the current error can be obtained

And amplitude of sinusoidal component

After cosine component amplitude and sine component amplitude of the n-th harmonic are obtained, the harmonic amplitude of the n-th harmonic is calculated by the following formula:

taking the average of the time periods can obtain:

sequentially scanning according to the harmonic order of the preset working frequency of the compressor, sequentially taking different harmonic order n values, and repeating the solving process of the harmonic amplitude value under each determined harmonic order to obtain the harmonic amplitude value corresponding to each harmonic order of the compressor under the preset working frequency as follows:

and finally, comparing the calculated harmonic amplitude with a pre-stored standard harmonic amplitude, so as to determine the target harmonic order which does not meet the preset conditions of standard harmonic vibration.

In any of the above technical solutions, before the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error, the method for controlling the compressor assembly specifically includes: calculating the average value of the current errors of a plurality of harmonic orders; calculating a steady-state decision value according to the current error average value; and based on the fact that the steady-state judgment value is larger than a preset threshold value, calculating the harmonic amplitude corresponding to each harmonic order according to the current error.

In the technical scheme, before the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error, the average value of a plurality of current error values is taken, and then the corresponding steady-state judgment value is calculated according to the calculated current error average value.

The steady state judgment value is used for judging whether the compressor is in a steady working state currently or not, specifically, the steady state judgment value is compared with a preset threshold value, if the steady state judgment value is larger than or equal to the threshold value, the compressor is in the steady working state currently, and if the steady state judgment value is smaller than the threshold value, the compressor is in an unstable working state currently. Whether the compressor is in a stable working state or not is judged in advance, the obtained rotating speed is suitable for calculating the harmonic amplitude, and the influence of instantaneous abnormal data fluctuation on a final calculation result can be avoided, so that the reliability and the stability of the control method are improved.

Then, after the compressor is determined to be in a stable working state, the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error is executed, so that the system establishes a two-dimensional comparison table of the preset working frequency and the target harmonic order, namely a target table according to the calculation result.

The process of calculating the steady-state determination value from the current error average value is as follows: comparing the current error average value of each harmonic order with a preset steady-state judgment threshold value in sequence, and accumulating the steady-state judgment values if the current error average value is smaller than the steady-state judgment threshold value; correspondingly, if the current error average value is greater than the steady-state decision threshold value, the steady-state decision value is decremented. After the judgment of each harmonic order is completed in sequence, the finally obtained steady-state judgment value is used for judging whether the compressor is in a stable working state or not.

A second aspect of the present invention provides a compressor assembly comprising: a memory having a program or instructions stored thereon; a processor configured to execute a program or instructions to implement the method of controlling a compressor assembly as in any of the above-mentioned embodiments.

In the compressor assembly provided by the invention, the processor executes the program to realize the steps of the control method of the compressor assembly according to any one of the above technical schemes, so that the compressor assembly has all the beneficial effects of the control method of the compressor assembly according to any one of the above technical schemes.

In any of the above solutions, the compressor assembly further includes: a compressor; and the processor can adjust the driving current of the compressor according to the first current harmonic signal output by the wave limiting filter.

In the technical scheme, the wave limiting filter is connected with the compressor, and the current regulator can regulate and control the power supply current of the compressor so as to correspondingly regulate the working state of the compressor. Specifically, the processor may correspondingly adjust the operating state of the compressor through the current regulator, such as adjusting the operating frequency, the rotating speed, and the like of the compressor.

The compressor assembly further comprises a wave limiting filter connected in parallel with the current regulator, the wave limiting filter being capable of adjusting the supply voltage of the compressor. After the processor calculates the initial compensation voltage and the amplitude limiting attenuation coefficient of the wave limiting filter according to the control method of the compressor assembly of any technical scheme, the wave limiting filter is controlled to output the compensated voltage after amplitude limiting to the power supply circuit according to the initial compensation voltage and the amplitude limiting attenuation coefficient, so that the working state of the compressor is controlled in an electric control mode, on one hand, the high-frequency oscillation noise of the compressor is reduced, and on the other hand, the drive voltage is prevented from being excessively compensated by the wave limiting filter. The working reliability and stability of the compressor are improved, the working noise of the compressor is reduced, and the technical effect of user experience is improved.

In any of the above solutions, the compressor assembly further includes: the speed regulator is connected with the compressor; and the processor can control the current regulator to work according to the output current of the speed regulator and the first current harmonic signal.

In this solution, the compressor assembly further comprises a speed regulator and a current regulator. The speed regulator is connected with the compressor. In the working process, the speed regulator controls the rotating speed of the compressor through an electric signal. The wave limiting filter is connected with the speed regulator or the current regulator. The wave limiting filter is connected with the speed regulator based on the wave limiting filter, the wave limiting filter compensates the first current harmonic signal determined according to the working frequency to the speed regulator, and the electric control signal of the speed regulator is updated through the first current harmonic signal, so that self-adaptive harmonic suppression and automatic compensation control for the compressor are achieved. When the wave limiting filter is connected with the current regulator, the wave limiting filter controls the current regulator to work according to a first current harmonic signal determined by the working frequency, specifically, the compensation voltage for the current regulator is calculated according to the first current harmonic signal, so that the current regulator is controlled to regulate the driving current of the compressor through the compensation voltage, and the self-adaptive harmonic suppression and automatic compensation control for the compressor are realized.

A third aspect of the present invention provides a refrigeration apparatus comprising: a compressor assembly as in any one of the preceding claims.

In this solution, a refrigeration device is defined provided with a compressor assembly according to the above-mentioned solution. Specifically, the processor of the compressor assembly may obtain operating parameters of the compressor during operation of the compressor, such as voltage values, current values, and rotational speed. Correspondingly, the processor can control the compressor to execute the control method of the compressor assembly limited by any technical scheme, so that the abnormal high-frequency vibration of the compressor is avoided from an electronic control angle, the vibration noise of the compressor in the working process is reduced, the technical problem of high working noise of the compressor is solved, and the core competitiveness of refrigeration equipment is improved.

In any one of the above technical solutions, the refrigeration apparatus further includes: and the power supply circuit is connected with the compressor assembly and can supply power to the compressor assembly.

In the technical scheme, the refrigeration equipment further comprises a power supply circuit capable of supplying power to the compressor assembly, one end of the power supply circuit is connected with a power supply, the other end of the power supply circuit is connected with the compressor assembly, and therefore electric energy for continuous operation of the compressor is provided.

In any one of the above technical solutions, the refrigeration apparatus includes: refrigerators, freezers, and air conditioners.

In this technical scheme, two kinds of compressor refrigeration plant that are comparatively commonly used have been enumerated. The compressor on the refrigerator can influence the user on one hand and normally have dinner at the produced high frequency noise of working process, and on the other hand can influence the user at night and have a rest, can reduce the high frequency noise of compressor through the compressor unit who sets up among the above-mentioned technical scheme to solve this problem. In a similar way, the air conditioner is generally arranged in a room with a long stay time of a user, if the noise of the compressor in the working process is too large, the normal rest of the user can be influenced, and the emotion of the user is influenced.

A fourth aspect of the present invention provides a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement a method of controlling a compressor assembly as in any one of the preceding claims.

The readable storage medium provided by the present invention, when the program is executed by the processor, implements the steps of the control method of the compressor assembly according to any of the above technical solutions, and therefore, the readable storage medium includes all the advantages of the control method of the compressor assembly according to any of the above technical solutions.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates one of the flow charts of a control method of a compressor assembly according to an embodiment of the present application;

FIG. 2 illustrates a second flow chart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 3 illustrates a third flowchart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 4 illustrates a fourth flowchart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 5 illustrates a fifth flowchart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 6 illustrates a sixth flowchart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 7 illustrates a seventh flowchart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 8 illustrates an eighth flowchart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 9 illustrates a ninth flowchart of a method of controlling a compressor assembly according to an embodiment of the present application;

FIG. 10 shows a control block diagram of a wave limiting filter according to an embodiment of the application;

FIG. 11 is a schematic diagram illustrating a control principle of a wave limiting filter according to an embodiment of the present application;

FIG. 12 illustrates a noise ratio plot for a compressor assembly according to an embodiment of the present application;

fig. 13 shows a vibration ratio diagram of a compressor assembly according to an embodiment of the present application.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A control method of a compressor assembly, a refrigeration apparatus, and a readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 13.

Example one

In an embodiment of the first aspect of the present application, there is provided a control method of a compressor assembly, the compressor assembly including a compressor and a wave limiting filter, as shown in fig. 1, the control method including:

102, acquiring the working frequency of a compressor;

step 102, determining a first current harmonic signal output by a wave limiting filter according to the working frequency;

and 102, adjusting the driving current of the compressor according to the first current harmonic signal.

In this embodiment, the control method of the compressor assembly is used to control the operation of the compressor assembly. The compressor assembly comprises a compressor and a wave limiting filter, the wave limiting filter is connected with the compressor, in the working process, the control method firstly obtains the working frequency of the compressor, then the compressor determines a first current harmonic signal correspondingly output by the wave limiting filter according to the working frequency, and finally the driving current of the compressor is adjusted according to the first current harmonic signal after the first current harmonic signal is determined so as to correspondingly adjust the working state of the compressor.

Example two

In an embodiment of the second aspect of the present application, as shown in fig. 2, specifically, before the step of determining the first current harmonic signal output by the wave-limiting filter according to the operating frequency, the control method further includes:

respectively acquiring working parameters of a compressor at a plurality of preset working frequencies;

step 202, determining a plurality of harmonic orders under each preset working frequency;

step 204, calculating a harmonic amplitude corresponding to each harmonic order according to the working parameters;

step 206, determining a target harmonic order meeting a preset condition from the multiple harmonic orders according to a comparison result of the harmonic amplitude and a pre-stored standard harmonic amplitude;

step 208, store the predetermined operating frequency and the target harmonic order association as a target table.

In this embodiment, a description is given of a step of determining the output voltage of the proportional resonant regulator according to the operating frequency. Specifically, the compressor is controlled to operate at a plurality of preset operating frequencies for a preset time, so that the operating parameters of the compressor are respectively obtained at the plurality of preset operating frequencies, and a plurality of harmonic orders corresponding to the compressor at each preset operating frequency are determined.

EXAMPLE III

In the third embodiment of the present application, specifically, when constructing the target table, the operating parameter at each predetermined operating frequency may be sampled multiple times, so as to ensure stability and reliability of data by using an average value of the multiple samples, and the specific sampling times are not limited.

Example four

In an embodiment of the fourth aspect of the present application, as shown in fig. 3, specifically, the step of determining the first current harmonic signal output by the wave-limiting filter according to the operating frequency specifically includes:

step 302, inquiring a corresponding target harmonic order in a target table according to the working frequency;

step 304, respectively calculating a second current harmonic signal corresponding to each target harmonic order;

step 306, determining the second current harmonic signal as the first current harmonic signal based on the number of the second current harmonic signals being one; the first current harmonic signal is determined from the plurality of second current harmonic signals based on the number of second current harmonic signals being a plurality.

In this embodiment, the development illustrates how the first current harmonic signal exhaled by the limiting filter is determined in dependence on the operating frequency. Specifically, the target harmonic order corresponding to the operating frequency, that is, the harmonic order not meeting the correspondence of the vibration table pointer, is searched from the target table according to the operating frequency. And then respectively calculating a second current harmonic signal value corresponding to each target harmonic order, and calculating a corresponding first current harmonic signal according to the second current harmonic signal value. Therefore, the wave limiting filter can be matched with a prestored target table to finish the self-adaptive identification of the first current harmonic signal.

In particular, the second current harmonic signal corresponds to a group module in the wave limiting filter, and the second current harmonic signal simultaneously corresponds to a harmonic order that does not meet the vibration criteria. In the process of calculating the first current harmonic signal according to the second current harmonic signal, if a single second current harmonic signal is determined, the second current harmonic signal is taken as the first current harmonic signal. And if a plurality of current harmonic signals are determined, summing the determined plurality of second current harmonic signals to obtain a first current harmonic signal. The embodiment specifically explains how the wave-limiting filter completes self-adaptive harmonic suppression and automatic compensation control, the reliability and the accuracy of the self-adaptive harmonic suppression can be improved by calling a target table to calculate the first current harmonic signal, and meanwhile, the calculated amount and the system processing load are reduced, so that the control method of the compressor component is optimized, the high-frequency vibration noise of the compressor is reduced, and the technical effect of the user experience is improved.

EXAMPLE five

In an embodiment of the fifth aspect of the present application, specifically, the compressor assembly further includes a speed regulator, as shown in fig. 4, the step of adjusting the driving current of the compressor according to the first current harmonic signal specifically includes:

step 402, acquiring an output current of a speed regulator;

step 404, determining a harmonic current according to the first current harmonic signal;

step 406, determining a target regulating current according to the difference between the output current and the harmonic current;

step 408, the driving current is adjusted to the target adjustment current.

In this embodiment, the compressor assembly is further provided with a speed regulator, the speed regulator is connected with the compressor, and the speed regulator can adjust the rotating speed of the compressor through an electric control signal during operation. On the basis, the wave limiting filter is connected with the speed regulator in parallel, the wave limiting filter obtains an output current value output by the speed regulator when outputting a first current harmonic signal in a self-adaptive mode according to the working frequency, then the first current harmonic signal is compensated to the output current value to obtain a target regulating current for completing current compensation, and then the speed regulator or other power supply elements are controlled to regulate the driving current of the compressor to the target regulating current. Through setting up the speed regulator with the cooperation work of wave limiting filter, make wave limiting filter can combine speed regulator to realize self-adaptation harmonic suppression and automatic compensation control to accomplish the automatic suppression of high frequency harmonic vibration in automatically controlled angle, and then realize reducing compressor work noise, prolong compressor life's technological effect.

EXAMPLE six

In an embodiment of the sixth aspect of the present application, specifically, as shown in fig. 5, the step of adjusting the driving current to the target adjustment current specifically includes:

step 502, calculating a compensation voltage according to a target regulation current;

and step 504, compensating the driving voltage of the compressor by the compensation voltage.

In this embodiment, a way of adjusting the drive current to the target adjustment current is defined. Specifically, after the target adjusting current is determined, the corresponding compensation voltage is calculated according to the difference value between the target adjusting current and the current driving current, and then the compensation voltage is compensated to the driving voltage of the compressor to realize the corresponding adjustment of the driving current of the compressor, so that the high-frequency harmonic vibration of the compressor is suppressed by adjusting the driving current of the compressor, and the high-frequency vibration noise of the compressor is reduced.

EXAMPLE seven

In an embodiment of the seventh aspect of the present application, specifically, as shown in fig. 6, the step of compensating the driving voltage of the compressor by the compensation voltage specifically includes:

step 602, determining a voltage vector value according to the compensation voltage;

step 604, superimposes the voltage vector value on the voltage vector of the driving voltage.

In this embodiment, it is defined how to compensate the voltage for the driving voltage of the compressor. Specifically, after the compensation voltage is determined, each voltage vector value corresponding to the compensation voltage is determined according to the compensation voltage, and then each voltage vector value is correspondingly superposed on each voltage vector of the driving voltage to obtain the driving voltage after compensation is completed. This compensating voltage is provided by the proportion resonance regulator, and the proportion resonance regulator can be according to the preliminary output voltage of target table inquiry out corresponding, after the amplitude limiting attenuation coefficient execution that restricts according to this application corresponds the amplitude limiting strategy, and the output voltage of final gained can avoid the compressor on the one hand to appear unusual high frequency vibration in the course of the work, reduces compressor work noise, and on the other hand can avoid the excessive compensation driving voltage of proportion resonance regulator, ensures that the compressor can be in the long-term stable work of the basis of making an uproar of falling. Therefore, the control method for optimizing the compressor assembly is realized, the reliability and the control accuracy of the control method are improved, the vibration noise of the compressor is reduced from the aspect of electric control, and the technical effect of user experience is improved.

Example eight

In an embodiment of the eighth aspect of the present application, specifically, the working parameter includes a working current, and as shown in fig. 7, the step of calculating the harmonic amplitude corresponding to each harmonic order according to the working parameter specifically includes:

step 702, calculating a current error corresponding to each harmonic order according to the working current;

step 704, calculating a harmonic amplitude corresponding to each harmonic order according to the current error.

In this embodiment, the step of calculating the harmonic amplitude corresponding to each harmonic order according to the operating parameters is explained. Specifically, a current error of the compressor at each harmonic order is calculated according to the working current, and then a harmonic amplitude of the compressor at each harmonic order is calculated according to the current error.

On the basis, the working current i is calculated by the following formula_s：

Represents the direct current component of the operating current,

Storing the current error for a period of time yields:

where N corresponds to the sample value at the current sample time.

And amplitude of sinusoidal component

taking the average of the time periods can obtain:

Example nine

In an embodiment of the ninth aspect of the present application, specifically, as shown in fig. 8, before the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error, the method for controlling the compressor assembly specifically includes:

step 802, calculating a current error average value of a plurality of harmonic orders;

step 804, calculating a steady-state decision value according to the current error average value;

and 806, based on the steady-state judgment value being larger than the preset threshold, executing the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error.

In this embodiment, before the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error, the average value of the plurality of current error values is taken, and then the corresponding steady-state determination value is calculated according to the calculated current error average value.

Example ten

In an embodiment of the tenth aspect of the present application, specifically, as shown in fig. 9, a control method of a compressor assembly includes:

step 902, obtaining a compressor current signal;

step 904, storing the compressor current error signal for a certain time, sequentially scanning the harmonic order of the compressor running frequency and adaptively identifying the harmonic order of which the corresponding harmonic vibration value does not meet the vibration standard, storing the corresponding working frequency and the corresponding harmonic order of which the vibration standard does not meet, and constructing and storing a two-dimensional table of the compressor frequency and the corresponding harmonic order of which the vibration standard does not meet;

step 906, looking up a table to obtain the identified corresponding working frequency and the corresponding harmonic order which does not meet the vibration standard, and connecting the harmonic order with a self-adaptive wave-limiting filter in parallel to realize high-frequency harmonic suppression;

step 908, feeding back the compensation harmonic current value of the adaptive wave-limiting filter to a current instruction output by the speed regulator to realize adaptive harmonic suppression and automatic compensation control;

and 910, controlling the variable-frequency driving of the compressor based on the adaptive harmonic automatic compensation control.

In this embodiment, in step 902, the relationship of adding and being equal to zero is satisfied for the three-phase current values of the motor, so that any two-phase current value is obtained, and the third-phase current value can be calculated.

The real-time current signal of the compressor is obtained as follows:

wherein

Represents the direct current component of the current signal,

representing the magnitude of the nth harmonic cosine component of the fluctuating component of the current signal,

representing the amplitude of the nth harmonic sinusoidal component in the fluctuating component of the current signal;

in step 904, in a steady state condition of the closed loop control system:

wherein

Representing the current error signal.

And after judging that the current working state of the compressor is in a steady-state working condition, storing the latest compressor current error signal data for a period of time. The harmonic orders of the running frequency of the compressor are scanned in sequence and automatically identified and confirmed to correspond to the harmonic orders which do not meet the vibration standard, and the method specifically comprises the following steps:

storing the latest period of time current error signal can obtain:

where N corresponds to the sample value at the current sample time,

the following trigonometric operations were performed:

therefore, the amplitude of the cosine component of the nth harmonic of the current error signal can be obtained by obtaining the direct current component through the low-pass filtering link

And amplitude of sinusoidal component

Then

After the cosine component amplitude and the sine component amplitude of the nth harmonic are obtained, the amplitude of the nth harmonic can be calculated as follows:

namely:

taking the average value of the period of time, the following can be obtained:

scanning is sequentially carried out according to the harmonic order of the running frequency of the compressor, different harmonic order n values are sequentially taken, the solving process of the harmonic amplitude is repeated under each determined harmonic order, and the amplitude result of each order of harmonic of the corresponding running frequency of the compressor can be obtained as follows:

comparing the obtained amplitude result of each order of harmonic of the corresponding compressor running frequency with the harmonic amplitude standard corresponding to the compressor frequency vibration standard to obtain the current compressorOperating frequency corresponding to harmonic order [ n ] not meeting vibration criteria₁…n_n]Recording and storing the operating frequency

And its corresponding harmonic order [ n ] not meeting the vibration criteria₁…n_n]。

The compressor is operated at different target frequencies at which the above calculations are performed, and a two-dimensional table of compressor frequencies and their corresponding harmonic orders that do not meet the vibration criteria is obtained and stored in a memory device of the control system.

In step 906, the identified corresponding operating frequency and the corresponding harmonic order that does not satisfy the vibration standard are obtained by looking up a table by reading a two-dimensional table result of the storage device of the control system, and the corresponding harmonic frequency that does not satisfy the vibration standard under the current operating frequency can be obtained as follows:

the parallel adaptive wave-limiting filter realizes high-frequency harmonic suppression, wherein the adaptive wave-limiting filter is designed as follows:

firstly, the system transfer function of the adaptive wave-limiting filter is designed as follows:

respectively converting the resonant frequency values [ omega ]₀₁…ω_0n]Substituting the real-time current harmonic signals into the formula, connecting the adaptive wave-limiting filters with different corresponding resonant frequencies in parallel to form the adaptive wave-limiting filter, wherein the output of the adaptive wave-limiting filter is the real-time current harmonic signals which are accurately extracted. Specifically, refer to a control block diagram of the limiting filter shown in fig. 10, and a control principle schematic diagram of the limiting filter shown in fig. 11.

In step 908, the adaptive wave-limiting filter is connected in parallel to accurately extract the corresponding current harmonic signal in real time, and the compensation harmonic current value of the adaptive wave-limiting filter is fed back to the current command output by the speed regulator to realize adaptive harmonic suppression and automatic compensation control, which is shown in the schematic diagram of the control principle of the wave-limiting filter shown in fig. 11.

Wherein

Which is representative of the current error signal,

the accurate extracted current harmonic signal obtained by the wave limiting filter is as follows:

[I_{S1_comp}…I_{Sn_comp}]。

the total harmonic current value obtained by adding the harmonic values obtained by the self-adaptive extraction of the parallel self-adaptive wave-limiting filters is as follows:

I_{S_comp}＝I_{S1_comp}+I_{S2_comp}…+I_{Sn_comp}；

the total harmonic current value obtained by adding the sub-harmonic values obtained by the self-adaptive extraction of the parallel self-adaptive wave-limiting filter is fed back to the output value of the speed regulator, and the current instruction value after the self-adaptive harmonic suppression can be obtained as follows: i is^* _S＝I_{S_ASR}-I_{S_comp}。

EXAMPLE eleven

In an eleventh aspect of the present application, an embodiment provides a compressor assembly, including: a memory having a program or instructions stored thereon; a processor configured to execute a program or instructions to implement the control method of the compressor assembly as in any of the embodiments described above.

In the compressor assembly provided by the invention, the processor executes the program to realize the steps of the control method of the compressor assembly according to any one of the above embodiments, so that the compressor assembly has all the advantages of the control method of the compressor assembly according to any one of the above embodiments.

Example twelve

In an embodiment of the twelfth aspect of the present application, specifically, the compressor assembly further comprises: a compressor; and the processor can adjust the driving current of the compressor according to the first current harmonic signal output by the wave limiting filter.

In this embodiment, the limiting filter is coupled to the compressor, and the current regulator regulates the supply current to the compressor to correspondingly regulate the operating condition of the compressor. Specifically, the processor may correspondingly adjust the operating state of the compressor through the current regulator, such as adjusting the operating frequency, the rotating speed, and the like of the compressor.

The compressor assembly further comprises a wave limiting filter connected in parallel with the current regulator, the wave limiting filter being capable of adjusting the supply voltage of the compressor. After the processor calculates the initial compensation voltage and the amplitude limiting attenuation coefficient of the wave limiting filter according to the control method of the compressor component in any embodiment, the processor controls the wave limiting filter to output the amplitude-limited compensation voltage to the power supply circuit according to the initial compensation voltage and the amplitude limiting attenuation coefficient, so that the working state of the compressor is controlled in an electric control mode, on one hand, the high-frequency oscillation noise of the compressor is reduced, and on the other hand, the excessive compensation driving voltage of the wave limiting filter is avoided. The working reliability and stability of the compressor are improved, the working noise of the compressor is reduced, and the technical effect of user experience is improved.

EXAMPLE thirteen

In an embodiment of the thirteenth aspect of the present application, specifically, the compressor assembly further includes: the speed regulator is connected with the compressor; and the processor can control the current regulator to work according to the output current of the speed regulator and the first current harmonic signal.

In this embodiment, the compressor assembly further comprises a speed regulator and a current regulator. The speed regulator is connected with the compressor. In the working process, the speed regulator controls the rotating speed of the compressor through an electric signal. The wave limiting filter is connected with the speed regulator or the current regulator. The wave limiting filter is connected with the speed regulator based on the wave limiting filter, the wave limiting filter compensates the first current harmonic signal determined according to the working frequency to the speed regulator, and the electric control signal of the speed regulator is updated through the first current harmonic signal, so that self-adaptive harmonic suppression and automatic compensation control for the compressor are achieved. When the wave limiting filter is connected with the current regulator, the wave limiting filter controls the current regulator to work according to a first current harmonic signal determined by the working frequency, specifically, the compensation voltage for the current regulator is calculated according to the first current harmonic signal, so that the current regulator is controlled to regulate the driving current of the compressor through the compensation voltage, and the self-adaptive harmonic suppression and automatic compensation control for the compressor are realized.

Example fourteen

An embodiment of a fourteenth aspect of the present application provides a refrigeration apparatus, specifically, the refrigeration apparatus includes: a compressor assembly as in any one of the embodiments above.

In this embodiment, a refrigeration device provided with the compressor assembly of the above-described embodiment is defined. Specifically, the processor of the compressor assembly may obtain operating parameters of the compressor during operation of the compressor, such as voltage values, current values, and rotational speed. Correspondingly, the processor can control the compressor to execute the control method of the compressor assembly defined in any one of the embodiments, so that the abnormal high-frequency vibration of the compressor is avoided from an electronic control angle, the vibration noise of the compressor in the working process is reduced, the technical problem of high working noise of the compressor is solved, and the core competitiveness of refrigeration equipment is improved.

Example fifteen

In an embodiment of the fifteenth aspect of the present application, specifically, the refrigeration apparatus further includes: and the power supply circuit is connected with the compressor assembly and can supply power to the compressor assembly.

In this embodiment, the refrigeration equipment further includes a power supply circuit capable of supplying power to the compressor component, one end of the power supply circuit is connected to the power supply, and the other end of the power supply circuit is connected to the compressor component, so as to provide electric energy for the compressor to operate continuously, wherein the current regulator, the speed regulator and the wave limiting filter in the compressor component are all connected to the power supply circuit, and the wave limiting filter can correspondingly adjust the driving current acting on the compressor according to the operating frequency of the compressor, so as to reduce the high-frequency vibration noise of the compressor at the electric control angle.

Example sixteen

In an embodiment of the sixteenth aspect of the present application, in particular, a refrigeration device comprises: refrigerators, freezers, and air conditioners.

In this embodiment, two types of compressor refrigeration equipment that are more commonly used are listed. The high-frequency noise generated by the compressor on the refrigerator in the working process can influence normal dining of a user on the one hand, and can influence rest of the user at night on the other hand. In a similar way, the air conditioner is generally arranged in a room with a long stay time of a user, if the noise of the compressor in the working process is too large, the normal rest of the user can be influenced, and the emotion of the user is influenced.

Example seventeen

A seventeenth aspect of the present application provides a readable storage medium, on which a program or instructions are stored, the program or instructions, when executed by a processor, implementing the control method of the compressor assembly according to any of the above embodiments.

The readable storage medium provided by the present invention, when the program is executed by the processor, implements the steps of the control method of the compressor assembly according to any of the above embodiments, and therefore, the readable storage medium includes all the advantages of the control method of the compressor assembly according to any of the above embodiments.

EXAMPLE eighteen

In an eighteenth embodiment of the present application, fig. 12 shows a noise comparison graph of a compressor, where the abscissa is a test frequency, the ordinate is a noise value, and comparison objects are: the noise value generated by the compressor component before the adaptive noise harmonic suppression control is executed (a white cylinder in the figure); the compressor assembly generates noise values (shown as cross-hatched columns) after performing the adaptive noise harmonic suppression control.

The specific data are shown in table 1 below:

table 1

Therefore, the control method of the compressor assembly can reduce the noise value generated by the compressor during the operation.

Example nineteen

In a nineteenth aspect embodiment of the present application, fig. 13 shows a harmonic vibration ratio graph of a compressor, in which the abscissa is a test frequency and the ordinate is a harmonic vibration value. The comparison objects are respectively as follows: the compressor component performs harmonic vibration conditions before performing adaptive noise harmonic suppression control; the compressor assembly performs adaptive noise harmonic suppression control, and then the harmonic vibration condition.

The specific data are shown in table 2 below:

testing frequency	90.00	180.00	270.00	540.00	Hz
						Before inhibition	1.97	0.88	1.17	0.28	g
After inhibition	1.98	0.97	0.66	0.28	g

Table 2

It can be seen that the control method of the compressor assembly defined in the present application can reduce harmonic vibration generated during operation of the compressor.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for a compressor assembly including a compressor and a wave limiting filter, the control method comprising:

acquiring the working frequency of the compressor;

determining a first current harmonic signal output by the wave limiting filter according to the working frequency;

and adjusting the driving current of the compressor according to the first current harmonic signal.

2. The method of controlling a compressor assembly of claim 1, wherein prior to the step of determining a first current harmonic signal output by a wave-limiting filter based on the operating frequency, the method further comprises:

respectively acquiring working parameters of the compressor at a plurality of preset working frequencies;

determining a plurality of harmonic orders at each of the predetermined operating frequencies;

calculating the harmonic amplitude corresponding to each harmonic order according to the working parameters;

according to the comparison result of the harmonic amplitude and a pre-stored standard harmonic amplitude, determining a target harmonic order meeting a preset condition in the multiple harmonic orders;

storing the predetermined operating frequency and the target harmonic order association as a target table.

3. The method for controlling a compressor assembly according to claim 2, wherein the step of determining the first current harmonic signal output by the wave-limiting filter according to the operating frequency specifically comprises:

inquiring a corresponding target harmonic order in the target table according to the working frequency;

respectively calculating a second current harmonic signal corresponding to each target harmonic order;

determining the second current harmonic signal as the first current harmonic signal based on the number of the second current harmonic signals being one;

determining the first current harmonic signal from the plurality of second current harmonic signals based on the number of second current harmonic signals being a plurality.

4. The method of claim 1, further comprising a speed regulator, wherein the step of adjusting the drive current of the compressor based on the first current harmonic signal comprises:

acquiring the output current of the speed regulator;

determining a harmonic current from the first current harmonic signal;

determining a target regulation current according to a difference between the output current and the harmonic current;

adjusting the driving current to the target adjustment current.

5. The method of claim 4, wherein the step of adjusting the driving current to the target adjustment current comprises:

calculating a compensation voltage according to the target regulating current;

compensating the driving voltage of the compressor by the compensation voltage.

6. The method for controlling a compressor assembly according to claim 5, wherein the step of compensating the driving voltage of the compressor by the compensation voltage specifically comprises:

determining a voltage vector value according to the compensation voltage;

superimposing the voltage vector value on a voltage vector of the driving voltage.

7. The method according to any one of claims 2 to 6, wherein the operating parameter comprises an operating current, and the step of calculating the harmonic amplitude corresponding to each of the harmonic orders according to the operating parameter comprises:

calculating a current error corresponding to each harmonic order according to the working current;

and calculating the harmonic amplitude corresponding to each harmonic order according to the current error.

8. The method as claimed in claim 7, wherein before the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error, the method specifically comprises:

calculating a current error average for a plurality of the harmonic orders;

calculating a steady-state decision value according to the current error average value;

and based on the fact that the steady-state judgment value is larger than a preset threshold value, the step of calculating the harmonic amplitude corresponding to each harmonic order according to the current error is executed.

9. A compressor assembly, comprising:

a memory having a program or instructions stored thereon;

a processor configured to implement the program or instructions when executing the method of controlling a compressor assembly of any one of claims 1 to 8.

10. The compressor assembly of claim 9, further comprising:

a compressor;

and the processor can adjust the driving current of the compressor according to the first current harmonic signal output by the wave limiting filter.

11. The compressor assembly of claim 10, further comprising:

the speed regulator is connected with the compressor;

a current regulator connected to the compressor, the processor being capable of controlling the operation of the current regulator based on the output current of the speed regulator and the first current harmonic signal.

12. A refrigeration apparatus, comprising:

a compressor assembly according to any one of claims 9 to 11.

13. The refrigeration appliance according to claim 12, further comprising:

and the power supply circuit is connected with the compressor assembly and can supply power to the compressor assembly.

14. A cold appliance according to claim 12 or 13, wherein the cold appliance is a refrigerator or an air conditioner.

15. A readable storage medium on which a program or instructions are stored, characterized in that said program or instructions, when executed by a processor, implement a control method of a compressor assembly according to any one of claims 1 to 8.