WO2023124012A1

WO2023124012A1 - Compressor control method and apparatus, and air conditioner

Info

Publication number: WO2023124012A1
Application number: PCT/CN2022/105474
Authority: WO
Inventors: 邵海柱; 丛安平; 耿焱; 时斌; 刘春丽; 张波; 贾新旭; 冯正阳; 胡象辉
Original assignee: 青岛海尔空调电子有限公司; 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2021-12-28
Filing date: 2022-07-13
Publication date: 2023-07-06
Also published as: CN114370727A

Abstract

A compressor control method and apparatus, and an air conditioner. The method comprises: obtaining a current ripple voltage parameter value of a bus voltage of a frequency converter connected to a compressor; comparing the current ripple voltage parameter value with a preset ripple voltage parameter value; and determining an actual operation frequency of a compressor according to a comparison result. According to the compressor control method and apparatus, and the air conditioner, compressor control is carried out by a ripple voltage of a frequency converter bus, so that the objective of prolonging the service life of the frequency converter of the compressor can be achieved easily.

Description

Compressor control method, control device and air conditioner

technical field

The invention belongs to the technical field of air conditioning, and in particular relates to air conditioner technology, more specifically, relates to a control method for an air conditioner compressor, a control device and an air conditioner.

Background technique

Compared with fixed-frequency air conditioners, inverter air conditioners have the advantages of energy saving, fast temperature adjustment, and low noise, and are widely used in the field of air conditioning.

One of the core components of the frequency conversion air conditioner is the frequency converter. The smoothing capacitor in the frequency conversion controller usually uses an electrolytic capacitor to stabilize the bus voltage. Affected by factors such as running time, ripple current, and heat generation, the capacity of the electrolytic capacitor will decay. When the capacity decays to a certain extent, the capacitor will be damaged and the inverter will fail. The life of the electrolytic capacitor has become a shortcoming of the life of the inverter.

In order to prolong the service life of the electrolytic capacitor, the prior art uses the internal temperature of the capacitor as a control parameter, and adjusts the frequency of the compressor by detecting the internal temperature of the capacitor. However, the internal temperature of the electrolytic capacitor is not only difficult to detect, but also is affected by other factors, resulting in inaccurate detection. Therefore, it is difficult to realize, the adjustment accuracy is low, and it is difficult to popularize and use.

technical problem

One of the objectives of the present invention is to provide a compressor control method and control device, which utilizes the ripple voltage of the frequency converter bus to control the compressor, and prolongs the service life of the compressor frequency converter in an easy-to-implement manner.

technical solution

In order to achieve the purpose of the above invention, the compressor control method provided by the present invention is realized by the following technical solutions:

A compressor control method, the method comprising:

Obtain the current ripple voltage parameter value in the bus voltage of the inverter connected to the compressor;

comparing the current ripple voltage parameter value with a preset ripple voltage parameter value;

The actual running frequency of the compressor is determined according to the comparison result.

In one of the preferred embodiments, the actual operating frequency of the compressor is determined according to the comparison result, which specifically includes:

Obtain the current operating frequency of the compressor;

When the current ripple voltage parameter value is greater than the preset ripple voltage parameter value, reduce the current operating frequency as the actual operating frequency;

When the current ripple voltage parameter value is not greater than the preset ripple voltage parameter value, the current operating frequency is used as the actual operating frequency.

In one of the preferred embodiments, reducing the current operating frequency as the actual operating frequency specifically includes:

Acquiring the current difference between the current ripple voltage parameter value and the preset ripple voltage parameter value;

Determine the current frequency reduction value corresponding to the current difference value according to the known correspondence between the difference value and the frequency reduction value;

The current operating frequency is reduced according to the current frequency reduction value to obtain the actual operating frequency.

In one of the preferred embodiments, the method also includes:

judging whether the actual operating frequency is greater than a known lower limit frequency;

When the actual operating frequency is greater than the lower limit frequency, control the compressor to run at the actual run frequency; otherwise, control the compressor to run at the lower limit frequency.

In one of the preferred embodiments, the current ripple voltage parameter value is the current ripple voltage value or the current ripple voltage rising rate; correspondingly, the preset ripple voltage parameter value is the preset ripple voltage value or Preset ripple voltage rise rate.

In one of the preferred embodiments, the preset ripple voltage parameter value is determined by the following method:

When the capacity of the electrolytic capacitor in the frequency converter is not less than the preset capacity, control the frequency converter to operate with the minimum allowable voltage and the maximum allowable load, obtain the ripple voltage parameter value in this operating state, and determine it as the The preset ripple voltage parameter value is described above.

In order to achieve the aforementioned object of the invention, the compressor control device provided by the present invention is realized by the following technical solutions:

A compressor control device, characterized in that the device comprises:

The current ripple voltage parameter value acquisition unit is used to acquire the current ripple voltage parameter value in the bus voltage of the frequency converter connected to the compressor;

A ripple voltage comparison unit, configured to compare the current ripple voltage parameter value with a preset ripple voltage parameter value, and output a comparison result;

A frequency determining unit, configured to determine the actual operating frequency of the compressor according to the comparison result.

In one of the preferred embodiments, the device also includes:

The current operating frequency obtaining unit is used to obtain the current operating frequency of the compressor;

The frequency determination unit is configured to reduce the current operating frequency as the actual operating frequency when the comparison result is that the current ripple voltage parameter value is greater than the preset ripple voltage parameter value; the frequency determination The unit is further configured to use the current operating frequency as the actual operating frequency when the comparison result is that the current ripple voltage parameter value is not greater than the preset ripple voltage parameter value.

Another object of the present invention is to provide an air conditioner, which includes a frequency converter and a compressor, and the air conditioner also includes the above compressor control device.

Another object of the present invention is to provide an electronic device, including a processor, a memory, and a computer program stored on the memory, the processor is configured to execute the computer program to implement the compressor control method described above.

Beneficial effect

Compared with prior art, advantage and positive effect of the present invention are:

The compressor control method and control device provided by the present invention determine the actual operating frequency of the compressor by using the comparison result between the current ripple voltage parameter of the frequency converter bus and the preset ripple voltage parameter value, and control the compressor according to the actual operating frequency , the ripple voltage parameter can reflect the service life of the electrolytic capacitor of the inverter, control the frequency of the compressor based on the ripple voltage parameter, realize the adjustment of the compressor frequency based on the service life of the electrolytic capacitor, and then achieve the purpose of prolonging the service life of the electrolytic capacitor, thereby improving The service life of the frequency converter; moreover, the ripple voltage parameter can be easily obtained based on a detection method with a simple structure, and the detection accuracy is high, thereby improving the accuracy of the frequency adjustment of the compressor and helping to further improve the service life of the frequency converter; thus, The purpose of prolonging the service life of the frequency converter of the compressor is achieved in an easy-to-realize manner. Adopting the control method or the control device of the present invention in the air conditioner can improve the overall service life of the air conditioner.

Other features and advantages of the present invention will become clearer after reading the detailed description of the present invention in conjunction with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a schematic flow chart of an embodiment of the compressor control method of the present invention;

Fig. 2 is a schematic flow chart of another embodiment of the compressor control method of the present invention;

Fig. 3 is a structural schematic diagram of an embodiment of the compressor control device of the present invention;

Fig. 4 is a structural schematic diagram of another embodiment of the compressor control device of the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of the electronic device of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

It should be noted that the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered as The combination of technical solutions does not exist, nor is it within the scope of protection required by the present invention.

The compressors provided in the following embodiments are compressors used in inverter air conditioners. In the following compressor embodiments and air conditioner embodiments, the air conditioner uses a compressor, a condenser, an expansion valve, and an evaporator to implement a cooling and heating cycle of the air conditioner. The cooling and heating cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat an indoor space.

The refrigeration working principle of the air conditioner is: the compressor works so that the indoor heat exchanger (in the indoor unit, the evaporator at this time) is in an ultra-low pressure state, the liquid refrigerant in the indoor heat exchanger quickly evaporates and absorbs heat, and the indoor fan blows out The air from the air is cooled by the indoor heat exchanger coil and then becomes cold air and blows into the room. After being pressurized by the compressor, the evaporated and gasified refrigerant is condensed into a liquid state in the high-pressure environment of the outdoor heat exchanger (in the outdoor unit, the condenser at this time), releasing heat, and dissipating the heat through the outdoor fan To the atmosphere, such a cycle has achieved the cooling effect.

The heating working principle of the air conditioner is: the gaseous refrigerant is pressurized by the compressor to become a high-temperature and high-pressure gas, enters the indoor heat exchanger (in this case, the condenser), condenses and liquefies, releases heat, and becomes a liquid, and at the same time heats the indoor air, thereby To achieve the purpose of increasing the indoor temperature. The liquid refrigerant is decompressed by the throttling device, enters the outdoor heat exchanger (at this time, the evaporator), evaporates and gasifies, absorbs heat, and becomes a gas. At the same time, it absorbs the heat of the outdoor air (the outdoor air becomes colder), and becomes a gaseous refrigerant. Enter the compressor again to start the next cycle.

In the prior art, in order to prolong the service life of the inverter in the inverter air conditioner, especially the service life of the electrolytic capacitor, the internal temperature of the capacitor is used as a control parameter to adjust the frequency of the compressor, and the internal temperature is difficult to detect and detect. Inaccurate, which leads to difficulty in implementing the scheme and low adjustment accuracy. In order to solve the problems in the prior art, the present invention creatively proposes to adjust the frequency of the compressor based on the ripple voltage of the bus of the frequency converter, so as to prolong the service life of the frequency converter of the compressor in an easy-to-implement manner.

Fig. 1 is a schematic flowchart of an embodiment of the compressor control method of the present invention. Wherein, the compressor is a compressor used in an inverter air conditioner, and the compressor is connected with the inverter.

As shown in Fig. 1, this embodiment adopts the following method to realize compressor control.

Step 101: Obtain the current ripple voltage parameter value in the bus voltage of the frequency converter connected to the compressor.

During the use of the frequency converter, affected by different working parameters and working conditions, its bus voltage will fluctuate, which is called ripple voltage. The ripple voltage of the inverter is related to the capacity of its electrolytic capacitor, and the relationship between the two is negative. That is: the larger the ripple voltage, the smaller the capacitor capacity, and the shorter the capacitor life; on the contrary, the smaller the ripple voltage, the larger the capacitor capacity, and the longer the capacitor life.

The ripple voltage can be detected and obtained by setting a ripple detection circuit, the method of obtaining is simple, and the detection accuracy is high. The structure and principle of the ripple detection circuit are prior art, and will not be described in detail here.

In this step, the current ripple voltage parameter value refers to the parameter value determined according to the current ripple voltage collected according to the set sampling frequency during the operation of the compressor. In some embodiments, the current ripple voltage parameter value is the current ripple voltage value obtained directly. In some other embodiments, the current ripple voltage parameter value is the current ripple voltage rising rate. Specifically, the difference between the next ripple voltage value and the previous ripple voltage value collected according to the interval setting time is relative to The ratio of the set time is determined.

Step 102: Compare the current ripple voltage parameter value with a preset ripple voltage parameter value.

The preset ripple voltage parameter value is a known value. Usually before the air conditioner leaves the factory, it is determined by the research and development personnel through theoretical analysis, simulation, experimental testing and other processes and built into the air conditioner. It can be called at any time during the use of the air conditioner.

Corresponding to the current ripple voltage value parameter, the preset ripple voltage parameter value may be a preset ripple voltage value or a preset ripple voltage rising rate.

In this step, after the current ripple voltage parameter value is obtained in step 101, a preset ripple voltage parameter value consistent with its type is called, the two are compared, and a comparison result is output. In general, the comparison is the size of the two.

Step 103: Determine the actual operating frequency of the compressor according to the comparison result.

According to the comparison result in step 102, after the actual operating frequency of the compressor is determined in combination with an appropriate determination principle, the compressor is controlled to operate at the actual operating frequency, which can achieve the effect of prolonging the life of the electrolytic capacitor.

In this embodiment, the actual operating frequency of the compressor is determined by comparing the current ripple voltage parameter of the inverter bus with the preset ripple voltage parameter value, and the compressor is controlled according to the actual operating frequency. Since the ripple voltage parameter It can reflect the service life of the electrolytic capacitor of the frequency converter, and control the frequency of the compressor based on the ripple voltage parameter, realize the adjustment of the frequency of the compressor based on the service life of the electrolytic capacitor, and then achieve the purpose of prolonging the service life of the electrolytic capacitor, thereby improving the use of the frequency converter life. Moreover, the ripple voltage parameters can be easily obtained based on a detection method with a simple structure, and the detection accuracy is high, thereby improving the accuracy of the compressor frequency adjustment and helping to further improve the service life of the inverter; thus, achieving The purpose of prolonging the service life of the compressor inverter.

Fig. 2 is a schematic flowchart of another embodiment of the compressor control method of the present invention. Wherein, the compressor is a compressor used in an inverter air conditioner, and the compressor is connected with the inverter.

As shown in Fig. 2, this embodiment adopts the following method to realize compressor control.

Step 201: Obtain the current ripple voltage parameter value in the bus voltage of the frequency converter connected to the compressor.

Step 202: Compare the current ripple voltage parameter value with a preset ripple voltage parameter value.

In this step, after the current ripple voltage parameter value is obtained in step 201, a preset ripple voltage parameter value consistent with its type is called, the two are compared, and a comparison result is output. In general, the comparison is the size of the two.

Step 203: Obtain the current operating frequency of the compressor.

The current operating frequency is the operating frequency of the compressor determined according to the actual operating state of the air conditioner during the working process of the compressor. Under normal circumstances, the operation of the compressor is controlled according to the current operating frequency to complete the function of the air conditioner.

Step 204: Determine whether the comparison result of step 202 is that the current ripple voltage parameter value is greater than the preset ripple voltage parameter value. If yes, execute the processes of step 205 and step 206; otherwise, execute step 207.

Step 205: Perform frequency reduction processing. The specific processing process is the process of step 206 .

If it is determined in step 204 that the current ripple voltage parameter value is greater than the preset ripple voltage parameter value, the lifetime of the electrolytic capacitor will be shortened because the ripple voltage parameter value is too large. In this case, consider the balance between the life of the electrolytic capacitor and the regulation performance of the air conditioner, and perform frequency reduction processing of the compressor to prolong the life of the capacitor. When the frequency is lowered, the adjustment performance of the air conditioner will be affected. In order to avoid discomfort caused by a sudden change in the adjustment performance, it is preferable to use the method in step 206 to perform frequency reduction processing.

Step 206: Obtain the current difference between the current ripple voltage parameter value and the preset ripple voltage parameter value, determine the current frequency reduction value, reduce the current operating frequency according to the current frequency reduction value, and obtain the actual operating frequency. Then, step 208 is executed.

The difference between the current ripple voltage parameter value acquired in step 201 and the preset ripple voltage parameter value is calculated as the current difference value. Then, according to the corresponding relationship between the difference value and the frequency reduction value, the current frequency reduction value corresponding to the current difference value is determined. Among them, the corresponding relationship between the difference between the ripple voltage parameter value and the frequency reduction value is preset. This relationship is determined by the research and development personnel through theoretical analysis, simulation, and experimental testing, and is built into the air conditioner. During the use of the air conditioner Can be called anytime.

After the current frequency reduction value is determined, the current operation frequency is reduced according to the current frequency reduction value to obtain the actual operation frequency. Specifically, the current operating frequency is subtracted from the current frequency reduction value, and the resulting frequency difference is determined as the actual operating frequency.

Step 207: Use the current operating frequency as the actual operating frequency. Then, step 208 is executed.

If step 204 determines that the current ripple voltage parameter value is not greater than the preset ripple voltage parameter value, then the ripple voltage parameter value is within a reasonable range, and the electrolytic capacitor is in a normal wear and tear state. In the changing state, the normal adjustment performance of the air conditioner is considered as the optimal consideration, and the current operating frequency is not intervened, that is, the actual operating frequency of the compressor is kept unchanged at the current operating frequency.

Step 208: Determine whether the actual operating frequency determined in step 206 or step 207 is greater than the lower limit frequency. If yes, go to step 209; otherwise, go to step 210.

The lower limit frequency is the preset frequency value, which is the frequency value with better overall performance to maintain the normal operation of the air conditioner system. When the compressor is running, the lower limit frequency is the lowest frequency limit, and it cannot run at a frequency lower than the lower limit frequency. Therefore, the actual operating frequency determined in step 206 or step 207 is further compared with the lower limit frequency, and different processing is performed according to the comparison result.

Step 209: Control the compressor to run at the actual running frequency.

When the actual operating frequency is greater than the lower limit frequency, the compressor is controlled at the actual operating frequency to achieve a balance between the life of the electrolytic capacitor and the adjustment performance of the air conditioner.

Step 210: Control the compressor to run at the lower limit frequency.

When the actual operating frequency is not greater than the lower limit frequency, the lower limit frequency controls the operation of the compressor to maintain the minimum performance requirements of the air conditioner system.

In the control method for determining the actual operating frequency of the compressor based on the ripple voltage parameter, the preset ripple voltage parameter value is used as a reference value for comparison, and its value is related to the quality of the control performance. In some preferred embodiments, the preset ripple voltage parameter value is determined by the following method:

When the capacity of the electrolytic capacitor in the frequency converter is not less than the preset capacity, control the frequency converter to run with the minimum allowed voltage and the maximum load allowed, obtain the ripple voltage parameter value in this running state, and determine it as the preset ripple voltage parameter value.

Wherein, the preset capacity is a capacity value for the electrolytic capacitor to maintain a reasonable service life, generally a value slightly smaller than the nominal capacity of the capacitor.

During the use of the inverter, the ripple voltage is not only related to the capacity of the electrolytic capacitor, but also related to the working voltage and workload of the inverter. Generally, the smaller the working voltage, the bigger the ripple voltage; the bigger the working load, the bigger the ripple voltage. Using the above method to determine the preset ripple voltage parameter value not only comprehensively considers the influence of the working voltage, working load and capacitance, but also because the electrolytic capacitor has a large capacity when the inverter works at the lowest voltage and maximum load. The corresponding ripple voltage parameter value. Then, when the inverter is actually working, its working voltage will not be lower than the minimum voltage, and its working load will not be higher than the maximum load. The main factor that causes the actual current ripple voltage parameter value to be too large is the electrolytic capacitor capacity . Therefore, using the preset ripple voltage parameter value determined by the above method as a comparison reference value can improve the accurate judgment on the capacity and service life of the electrolytic capacitor, thereby improving the accuracy of the frequency adjustment of the compressor.

Fig. 3 shows a schematic structural diagram of an embodiment of the compressor control device of the present invention, wherein the compressor is a compressor used in an inverter air conditioner, and the compressor is connected to an inverter.

The structural units included in the control device of this embodiment, the functions of the structural units and their interconnection are described in detail as follows.

As shown in Figure 3, the compressor control unit includes:

The current ripple voltage parameter value acquisition unit 31 is configured to acquire the current ripple voltage parameter value in the bus voltage of the frequency converter connected to the compressor.

The ripple voltage comparison unit 32 is configured to compare the current ripple voltage parameter value acquired by the current ripple voltage parameter value acquisition unit 31 with the preset ripple voltage parameter value, and output the comparison result.

The frequency determination unit 33 is configured to determine the actual operating frequency of the compressor according to the comparison result output by the ripple voltage comparison unit 32 .

The control device with the above-mentioned structure runs corresponding software programs and performs corresponding functions, and performs compressor control according to the process of the embodiment of the compressor control method in Figure 1 and other preferred embodiments, achieving the same level as that of the embodiment in Figure 1 and other preferred embodiments corresponding technical effects.

Fig. 4 shows a schematic structural diagram of another embodiment of the compressor control device of the present invention, wherein the compressor is a compressor used in an inverter air conditioner, and the compressor is connected to an inverter.

As shown in Figure 4, the compressor control unit includes:

The current ripple voltage parameter value acquisition unit 41 is configured to acquire the current ripple voltage parameter value in the bus voltage of the frequency converter connected to the compressor.

The ripple voltage comparison unit 42 is configured to compare the current ripple voltage parameter value acquired by the current ripple voltage parameter value acquisition unit 31 with the preset ripple voltage parameter value, and output the comparison result.

The current operating frequency acquisition unit 44 is configured to acquire the current operating frequency of the compressor.

The frequency determination unit 43 is configured to determine the actual operating frequency of the compressor according to the comparison result output by the ripple voltage comparison unit 32 and the current frequency acquired by the current frequency acquisition unit 44 .

The control device with the above structure runs corresponding software programs and performs corresponding functions, and performs compressor control according to the process of the embodiment of the compressor control method in Figure 2 and other preferred embodiments, to achieve the same level as that of the embodiment in Figure 2 and other preferred embodiments corresponding technical effects.

The compressor control devices of the above-mentioned embodiments are applied to air conditioners, which can achieve the purpose of prolonging the service life of compressor frequency converters in an easy-to-implement manner, thereby improving the overall service life of the air conditioner.

Fig. 5 shows a structural block diagram of an embodiment of the electronic device of the present invention. The electronic device includes a processor 51, a memory 52 and a computer program 521 stored on the memory 2, and the processor 51 is configured to execute the computer program 521 to realize the compressor control of the embodiment in FIG. 1, the embodiment in FIG. 2 and other preferred embodiments method, and achieve the technical effects of the corresponding embodiments. The electronic equipment can be a main control board, a controller, etc. of an air conditioner.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art can still understand the foregoing embodiments. Modifications are made to the technical solutions described, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed in the present invention.

Claims

A compressor control method, characterized in that the method comprises:

Obtain the current ripple voltage parameter value in the bus voltage of the inverter connected to the compressor;

comparing the current ripple voltage parameter value with a preset ripple voltage parameter value;

The actual running frequency of the compressor is determined according to the comparison result.
The compressor control method according to claim 1, wherein the actual operating frequency of the compressor is determined according to the comparison result, which specifically includes:

Obtain the current operating frequency of the compressor;

When the current ripple voltage parameter value is greater than the preset ripple voltage parameter value, reduce the current operating frequency as the actual operating frequency;

When the current ripple voltage parameter value is not greater than the preset ripple voltage parameter value, the current operating frequency is used as the actual operating frequency.
The compressor control method according to claim 2, wherein reducing the current operating frequency as the actual operating frequency specifically includes:

Acquiring the current difference between the current ripple voltage parameter value and the preset ripple voltage parameter value;

Determine the current frequency reduction value corresponding to the current difference value according to the known correspondence between the difference value and the frequency reduction value;

The current operating frequency is reduced according to the current frequency reduction value to obtain the actual operating frequency.
The compressor control method according to claim 2, further comprising:

judging whether the actual operating frequency is greater than a known lower limit frequency;

When the actual operating frequency is greater than the lower limit frequency, control the compressor to run at the actual run frequency; otherwise, control the compressor to run at the lower limit frequency.
The compressor control method according to any one of claims 1 to 4, wherein the current ripple voltage parameter value is the current ripple voltage value or the current ripple voltage rising rate; correspondingly, the preset Set the ripple voltage parameter value as a preset ripple voltage value or a preset rise rate of the ripple voltage.
The compressor control method according to any one of claims 1 to 4, wherein the preset ripple voltage parameter value is determined by the following method:

When the capacity of the electrolytic capacitor in the frequency converter is not less than the preset capacity, control the frequency converter to operate with the minimum allowable voltage and the maximum allowable load, obtain the ripple voltage parameter value in this operating state, and determine it as the The preset ripple voltage parameter value is described above.
A compressor control device, characterized in that the device comprises:

The current ripple voltage parameter value acquisition unit is used to acquire the current ripple voltage parameter value in the bus voltage of the frequency converter connected to the compressor;

A ripple voltage comparison unit, configured to compare the current ripple voltage parameter value with a preset ripple voltage parameter value, and output a comparison result;

A frequency determining unit, configured to determine the actual operating frequency of the compressor according to the comparison result.
The compressor control device according to claim 7, further comprising:

The current operating frequency obtaining unit is used to obtain the current operating frequency of the compressor;

The frequency determination unit is configured to reduce the current operating frequency as the actual operating frequency when the comparison result is that the current ripple voltage parameter value is greater than the preset ripple voltage parameter value; the frequency determination The unit is further configured to use the current operating frequency as the actual operating frequency when the comparison result is that the current ripple voltage parameter value is not greater than the preset ripple voltage parameter value.
An air conditioner, comprising a frequency converter and a compressor, characterized in that the air conditioner further comprises the compressor control device described in claim 7 or 8 above.
An electronic device, comprising a processor, a memory, and a computer program stored on the memory, wherein the processor is configured to execute the computer program to implement any one of the preceding claims 1 to 6 compressor control method.