Compressor frequency control method and apparatus, and device and storage medium

Abstract

Disclosed in the present application are a compressor frequency control method and apparatus, and a device and a storage medium. The method comprises: reducing the operating frequency of a compressor to a first frequency value on the basis of a torque compensation frequency, wherein the first frequency value is greater than or equal to the torque compensation frequency; maintaining the operating frequency of the compressor at the first frequency value for continuous operation for a preset duration; and reducing the operating frequency of the compressor to a second frequency value. The operating frequency of a compressor is reduced to a first frequency value greater than or equal to a torque compensation frequency, and the operating frequency of the compressor is maintained at the first frequency value for continuous operation for a preset duration, such that the pressure of the compressor is gradually reduced within the time period of the preset duration, but a current compensation mechanism for the compressor is not triggered; and the operating frequency of the compressor is then reduced to a second frequency value, such that the operating frequency of the compressor is reduced to a lower frequency, and the pressure of the compressor has also completely decreased, thereby reducing compressor protection problems caused by the pressure not decreasing due to a rapid reduction in frequency.

Description

Compressor frequency control method, device, equipment and storage medium

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on June 27, 2023, with application number 202310764317.1 and invention name “A compressor frequency control method, device, equipment and storage medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of compressor control technology, and in particular to a compressor frequency control method, device, equipment and storage medium. Background Art

[0003] With the continuous development of dryer technology, heat pump dryers are now widely used to achieve clothing care effects. Heat pump dryers use a heat pump circulation system to condense moisture and generate hot air to achieve the desired drying effect. During the initial drying process, due to the high humidity of the clothes, the heat pump circulation system's compressor needs to run continuously to increase the temperature of the drying drum.

[0004] As the compressor runs for a long time, the compressor pressure and temperature continue to increase. When it is detected that the compressor temperature exceeds the set temperature, the compressor frequency reduction logic is triggered.

[0005] However, if the frequency reduction logic reduces the frequency too quickly, although the operating frequency of the compressor is reduced, the pressure of the compressor has not yet been reduced, which can easily cause compressor protection problems under high pressure conditions.

[0006] Summary of the Invention

[0007] The purpose of this application is to propose a compressor frequency control method, device, equipment and storage medium to address the deficiencies of the above-mentioned prior art, and this purpose is achieved through the following technical solutions.

[0008] A first aspect of the present application provides a compressor frequency control method, the method comprising:

[0009] reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, the first frequency value being greater than or equal to the torque compensation frequency, the torque compensation frequency being the compressor frequency that triggers the compressor current compensation mechanism;

[0010] Maintaining the operating frequency of the compressor at a first frequency value for a preset period of time;

[0011] The operating frequency of the compressor is reduced to a second frequency value.

[0012] In some embodiments of the present application, a difference between the first frequency value and the torque compensation frequency is less than a preset threshold.

[0013] In some embodiments of the present application, the method further comprises:

[0014] Obtaining an operating parameter value of the compressor;

[0015] In a case where the acquired operating parameter value exceeds a first preset parameter value, a step of reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency is performed.

[0016] In some embodiments of the present application, the method further comprises:

[0017] In a case where the operating parameter value of the compressor does not exceed the first preset parameter value, according to the received frequency adjustment command, the operating frequency of the compressor is adjusted to the target frequency indicated by the frequency adjustment command.

[0018] In some embodiments of the present application, the method further comprises:

[0019] After reducing the operating frequency of the compressor to a second frequency value, obtaining an operating parameter value of the compressor;

[0020] In a case where the acquired operating parameter value is lower than the second preset parameter value, according to the received frequency adjustment command, the operating frequency of the compressor is adjusted to the target frequency indicated by the frequency adjustment command.

[0021] When the acquired operating parameter value is not lower than the second preset parameter value, the operating frequency of the compressor is maintained at the second frequency value.

[0022] In some embodiments of the present application, the torque compensation frequency is between 45 Hz and 55 Hz.

[0023] In some embodiments of the present application, the operating parameter value of the compressor includes one or more of the operating current of the compressor, the body temperature of the compressor, and the body pressure of the compressor.

[0024] A second aspect of the present application provides a compressor frequency control device, the device comprising:

[0025] a first frequency reduction module, configured to reduce the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, and maintain the operating frequency of the compressor at the first frequency value for a preset period of time; the first frequency value is greater than or equal to the torque compensation frequency, and the torque compensation frequency is the compressor frequency that triggers the compressor current compensation mechanism;

[0026] The second frequency reduction module is used to reduce the operating frequency of the compressor to a second frequency value.

[0027] The third aspect of the present application proposes an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method described in the first aspect above.

[0028] The fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method described in the first aspect when the program is executed by a processor.

[0029] Based on the above-mentioned compressor frequency control method, device, equipment and storage medium, the technical solution of this application has the following beneficial effects or advantages:

[0030] By reducing the operating frequency of the compressor to a first frequency value that is greater than or equal to the torque compensation frequency, and maintaining the operating frequency of the compressor at the first frequency value for a preset period of time, so that the pressure of the compressor gradually decreases during the preset period of time, but the compressor current compensation mechanism is not triggered, and then the operating frequency of the compressor is reduced to a second frequency value, so that the operating frequency of the compressor is reduced to a lower frequency, and the compressor pressure is also completely reduced, thereby reducing the compressor protection problem caused by the frequency reduction speed being too fast and the pressure not being reduced.

[0031] The above description is only an overview of the technical solution of this application. In order to more clearly understand the technical means of this application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of this application more obvious and easy to understand, the specific implementation methods of this application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] FIG1 is a flow chart of a compressor frequency control method according to an exemplary embodiment;

[0034] FIG2 is a flowchart showing an overall implementation of compressor frequency control according to an exemplary embodiment;

[0035] FIG3 is a schematic structural diagram of a compressor frequency control device according to an exemplary embodiment;

[0036] FIG4 is a hardware structure diagram of an electronic device according to an exemplary embodiment;

[0037] Fig. 5 is a schematic structural diagram of a storage medium according to an exemplary embodiment.

[0038] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0044] As mentioned above, as the compressor runs for a long time, problems such as high pressure and high temperature in the compressor system will arise. When the upper computer detects that the temperature of the compressor is too high, the frequency reduction logic of the compressor is triggered. Since the frequency reduction logic provided in the prior art before this application is to gradually reduce the frequency according to a certain constant, in order to ensure the frequency reduction efficiency, the frequency reduction speed is relatively fast, and the compressor frequency will quickly drop to a lower frequency. At this time, the compressor pressure has not yet dropped. In this low-frequency, high-pressure situation, it is easy to cause compressor protection problems.

[0045] Experimental research has found that during the rapid frequency reduction process, when the compressor frequency drops below the torque compensation frequency, in order to suppress the vibration of the compressor, the compressor's current compensation mechanism will be triggered. At this time, due to the high pressure of the compressor and the relatively high current, after the current compensation, the compressor current will suddenly change, thereby causing compressor protection.

[0046] Based on this, in order to reduce the compressor protection problem caused by the compressor running under high pressure, the present application proposes a compressor frequency control method to achieve the purpose of adaptive frequency reduction of the compressor.

[0047] That is, by reducing the operating frequency of the compressor to a first frequency value greater than or equal to the torque compensation frequency, and maintaining the operating frequency of the compressor at the first frequency value for a preset period of time, so that the pressure of the compressor gradually decreases during the preset period of time, but the compressor current compensation mechanism is not triggered, and then the operating frequency of the compressor is reduced to a second frequency value, so that the operating frequency of the compressor is reduced to a lower frequency. Since the pressure and current of the compressor have already dropped at this time, even if the current compensation mechanism of the compressor is triggered at this time, it will not cause the problem of instantaneous current mutation, and therefore will not cause the problem of compressor protection.

[0048] In the embodiment of the present application, the compressor frequency control scheme can be applied not only to heat pump clothes dryers, but also to heat pump air conditioning units.

[0049] The following describes in detail the technical solution of this application and how it solves the aforementioned technical problems using specific embodiments. The several specific embodiments listed can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The following describes the embodiments of this application in detail with reference to the accompanying drawings.

[0050] Example 1:

[0051] FIG1 is a flow chart of an embodiment of a method for controlling a frequency of a compressor according to an exemplary embodiment. In the embodiment of the present application, the compressor involved is a variable frequency compressor, that is, the operating frequency of the compressor can be changed.

[0052] As shown in FIG1 , the compressor frequency control method includes the following steps:

[0053] Step 101: reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, where the first frequency value is greater than or equal to the torque compensation frequency.

[0054] The torque compensation frequency is the compressor frequency that triggers the compressor current compensation mechanism.

[0055] It is worth noting that the torque compensation frequency is a relatively low compressor frequency. When the operating frequency of the compressor is lower than the torque compensation frequency, the vibration of the compressor body will increase due to the low frequency operation of the compressor. The current compensation mechanism triggered at this time dynamically determines the compensation current value based on the obtained compressor vibration data, and then compensates this compensation current value to the operating current of the compressor, so as to achieve the purpose of suppressing the vibration of the compressor.

[0056] In one implementation, the torque compensation frequency of the compressor is between 45 Hz and 55 Hz.

[0057] For example, assuming that the torque compensation frequency is 50Hz, when the operating frequency of the compressor is below 50Hz, the vibration data of the compressor is collected, and the compensation current value is calculated based on the collected vibration data, and then the calculated compensation current value is compensated to the current operating current of the compressor.

[0058] Before executing step 101, it is possible to determine whether the compressor is in a high-pressure operating state by obtaining the operating parameters of the compressor. If so, a process of adaptively reducing the compressor frequency based on the torque compensation frequency is triggered.

[0059] In a possible implementation, an operating parameter value of the compressor may be acquired in real time, and the operating parameter value may be compared with a first preset parameter value. When the operating parameter value exceeds the first preset parameter value, step 101 is triggered.

[0060] The operating parameter value of the compressor may represent the magnitude of the pressure intensity inside the compressor, and the first preset parameter value is a preset trigger threshold value for adaptive frequency reduction.

[0061] If the operating parameter value has exceeded the first preset parameter value, it means that the pressure intensity inside the compressor is relatively high. At this time, it is not appropriate to respond to the frequency adjustment command issued by the upper computer for rapid frequency adjustment, nor is it appropriate to continue operating at the current operating frequency. It is necessary to reduce the pressure intensity inside the compressor in time to avoid long-term operation at high pressure intensity.

[0062] In an optional embodiment, the operating parameter value of the compressor may include one or more of the operating current of the compressor, the frame temperature of the compressor, and the frame pressure of the compressor.

[0063] Among them, the operating current, body temperature and body pressure of the compressor can effectively reflect the magnitude of the internal pressure intensity of the compressor.

[0064] That is to say, the higher the operating current, fuselage temperature or fuselage pressure, the higher the pressure intensity inside the compressor.

[0065] During specific implementation, the operating current of the compressor is an electrical signal of the compressor and can be directly collected.

[0066] The compressor body temperature can be collected by setting a temperature sensor at a certain position on the compressor body, such as an NTC (Negative Temperature Coefficient) thermistor sensor.

[0067] The compressor body pressure can be measured by setting a pressure sensor at a certain position of the compressor body to collect the pressure intensity.

[0068] In one specific embodiment, by detecting the operating current of the compressor in real time, when the operating current exceeds a preset current threshold, it indicates that the internal pressure of the compressor is very high due to long-term operation, thus triggering the execution of step 101.

[0069] It should be noted that if the operating parameter value of the compressor does not exceed the first preset parameter value, it means that the pressure intensity inside the compressor is moderate, and even if the frequency adjustment is performed quickly in response to the frequency adjustment command issued by the upper computer, it will not cause compressor protection problems. Therefore, in this case, the operating frequency of the compressor can be adjusted to the target frequency indicated by the frequency adjustment command based on the received frequency adjustment command.

[0070] Furthermore, if no frequency adjustment command is issued, the system may continue to operate at the current operating frequency.

[0071] In an embodiment of the present application, the target frequency indicated by the frequency adjustment command is an operating frequency dynamically determined by the device according to actual needs, indicating the compressor frequency required for the operation of the device. It is an instruction issued by the software program of the device host computer and has no direct relationship with the aforementioned torque compensation frequency and the first frequency value.

[0072] Taking a heat pump dryer as an example, during the drying process, if it is detected that the air temperature in the drying drum exceeds the limit, which may cause damage to the clothes, the required operating frequency of the compressor is calculated according to the target temperature, and a frequency adjustment command is generated based on the calculated operating frequency.

[0073] Assume that it is detected that the air temperature in the drying drum is lower than the target temperature, which may extend the drying time of the clothes. Therefore, a target operating frequency is calculated based on the target temperature and the current operating frequency of the compressor, and the frequency adjustment command is generated using the target operating frequency.

[0074] It can be understood that the above-mentioned generation of frequency adjustment commands based on temperature is only an exemplary description. In addition to frequency adjustment based on temperature, the frequency can also be adjusted according to the condensing temperature of the heat pump circulation system. There are many ways to trigger the generation of frequency adjustment commands, which does not constitute a limitation to the solution of the present application.

[0075] Regarding the process of reducing the compressor operating frequency to the first frequency value based on the torque compensation frequency in step 101, in an optional embodiment, a preset threshold value may be set to limit the magnitude of the compressor frequency reduction to ensure that the internal pressure of the compressor is effectively reduced. In other words, the difference between the first frequency value and the torque compensation frequency must be less than the preset threshold value.

[0076] For example, assuming that the operating frequency of the compressor is 100Hz, the torque compensation frequency is 50Hz, and the preset threshold is 10Hz, then the first frequency value must be less than or equal to 60Hz, that is, the compressor frequency of 100Hz must be reduced to below 60Hz and above 50Hz.

[0077] Based on the above two implementations, it can be seen that as long as the operating frequency of the compressor is reduced to a frequency value above the torque compensation frequency, the current compensation mechanism will not be triggered, which will not cause the compressor current to suddenly change, and thus will not cause compressor protection problems.

[0078] Step 102: Maintain the operating frequency of the compressor at a first frequency value for a preset time period.

[0079] The preset duration is the time for maintaining operation after the first stage frequency reduction in step 101 is completed.

[0080] That is, if the first frequency value is equal to the frequency value of the torque compensation frequency, the compressor is allowed to continuously operate at the torque compensation frequency for a preset time period.

[0081] If the first frequency value is greater than the torque compensation frequency value, the compressor is allowed to continue running at the first frequency value for a preset time period.

[0082] It is worth noting that during the preset operating time period, since the operating frequency of the compressor is always above the torque compensation frequency, the current compensation mechanism will not be triggered, which will not cause a sudden sudden change in the compressor current and thus will not lead to compressor protection problems.

[0083] At the same time, during this period of operation, since the operating frequency of the compressor is reduced, the pressure intensity inside the compressor will slowly drop, and the current of the compressor will also slowly drop.

[0084] Step 103: Reduce the operating frequency of the compressor to a second frequency value.

[0085] The second frequency value is a preset lower frequency that is smaller than the torque compensation frequency. By reducing the operating frequency of the compressor to the second frequency value, the pressure intensity inside the compressor can be completely reduced.

[0086] It can be understood that the frequency reduction stage of the above-mentioned step 101 can be called the first frequency reduction stage. In the first frequency reduction stage, the operating frequency of the compressor drops to above the torque compensation frequency and maintains operation for a period of time. This can provide a buffer drop time for the pressure inside the compressor, and the operating current of the compressor will gradually drop as the pressure drops; the frequency reduction stage of step 103 can be called the second frequency reduction stage. In the second frequency reduction stage, the operating frequency of the compressor is further reduced to a lower frequency, so that the pressure inside the compressor can be further reduced.

[0087] It is worth noting that when the operating frequency of the compressor is reduced to the second frequency value, since the pressure inside the compressor has slowly dropped in the first frequency reduction stage, the operating current has also decreased accordingly. Therefore, even if the current compensation mechanism is triggered because the operating frequency is below the torque compensation frequency at this time, it will not cause a sudden change in the compressor current, and thus will not cause compressor protection problems.

[0088] It should be noted that in order to verify whether the internal pressure of the compressor has actually dropped, after the operating frequency of the compressor is reduced to the second frequency value, the operating parameter value of the compressor can be obtained again and compared with the second preset parameter value.

[0089] If the obtained operating parameter value is lower than the second preset parameter value, it means that the pressure inside the compressor has indeed dropped. At this time, whether it is a rapid frequency reduction or a rapid frequency increase, it will not cause compressor protection problems. Therefore, according to the received frequency adjustment command, the operating frequency of the compressor can be adjusted to the target frequency indicated by the frequency adjustment command.

[0090] If the obtained operating parameter value is not lower than the second preset parameter value, it means that the pressure inside the compressor has not dropped completely, and it is not suitable for rapid frequency reduction or rapid frequency increase at this time. Therefore, the operating frequency of the compressor can be maintained at the second frequency value until the operating parameter value of the compressor is lower than the second preset parameter value, and then the operating frequency of the compressor is adjusted to the target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.

[0091] As mentioned above, the operating parameter value of the compressor may include one or more of the operating current of the compressor, the body temperature of the compressor, and the body pressure of the compressor.

[0092] Among them, the operating current, body temperature and body pressure of the compressor can effectively reflect the magnitude of the internal pressure intensity of the compressor. The higher the operating current or body temperature or body pressure, the higher the internal pressure intensity of the compressor.

[0093] It is worth noting that the second preset parameter value is a pre-set operating parameter threshold value used to characterize a relatively low internal pressure of the compressor. Since the first preset parameter value is a pre-set trigger threshold value for adaptive frequency reduction, the compressor is under the condition of the first preset parameter value, indicating that the internal pressure intensity of the compressor is relatively high. Therefore, the second preset parameter value is smaller than the first preset parameter value.

[0094] As previously mentioned, the target frequency indicated by the frequency adjustment command is an operating frequency dynamically determined by the device based on actual needs and has no direct relationship with the aforementioned torque compensation frequency, first frequency value, and second frequency value. Generally speaking, the target frequency indicated by the frequency adjustment command is greater than the aforementioned second frequency value.

[0095] At this point, the compressor frequency control process shown in Figure 1 above is completed, by reducing the operating frequency of the compressor to a first frequency value greater than or equal to the torque compensation frequency, and maintaining the operating frequency of the compressor at the first frequency value for a preset period of time, so that the pressure of the compressor gradually decreases during the preset period of time, but does not trigger the compressor current compensation mechanism, and then reducing the operating frequency of the compressor to a second frequency value, so that the operating frequency of the compressor is reduced to a lower frequency, and the compressor pressure is also completely reduced, thereby reducing the compressor protection problem caused by the pressure not being reduced due to the frequency reduction speed being too fast.

[0096] Example 2:

[0097] Based on the embodiment shown in FIG1 , the overall implementation scheme of the compressor frequency control is explained below.

[0098] The overall implementation flow chart of the compressor frequency control shown in FIG2 includes the following steps:

[0099] Step 1: Detect the operating parameter values ​​of the compressor in real time.

[0100] The operating parameter value of the compressor can represent the magnitude of the pressure intensity inside the compressor.

[0101] Optionally, the operating parameter value of the compressor may include one or more of the operating current of the compressor, the body temperature of the compressor, and the body pressure of the compressor.

[0102] Among them, the operating current, body temperature and body pressure of the compressor can effectively reflect the magnitude of the internal pressure intensity of the compressor.

[0103] That is to say, the higher the operating current, fuselage temperature or fuselage pressure, the higher the pressure intensity inside the compressor.

[0104] During specific implementation, the operating current of the compressor is an electrical signal of the compressor and can be directly collected.

[0105] The compressor body temperature can be collected by providing a temperature sensor (such as an NTC thermistor sensor) at a certain position of the compressor body.

[0106] The compressor body pressure can be measured by setting a pressure sensor at a certain position of the compressor body to collect the pressure intensity.

[0107] Step 2: Determine whether the detected operating parameter value is greater than the first preset parameter value. If so, execute step 3; otherwise, execute step 7.

[0108] The first preset parameter value is a pre-set threshold for triggering adaptive frequency reduction. If the operating parameter value reaches the first preset parameter value, indicating that the pressure intensity inside the compressor is relatively high, the process of adaptively reducing the compressor frequency based on the torque compensation frequency is triggered. If the operating parameter value of the compressor does not exceed the first preset parameter value, it indicates that the pressure intensity inside the compressor is moderate.

[0109] Step 3: reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, and maintaining the operating frequency of the compressor at the first frequency value for a preset period of time.

[0110] Among them, the torque compensation frequency is the compressor frequency that triggers the compressor current compensation mechanism. It is a relatively low compressor frequency. When the operating frequency of the compressor is lower than the torque compensation frequency, the vibration of the compressor body will increase due to the low frequency operation of the compressor. At this time, the current compensation mechanism triggered is to dynamically determine the compensation current value based on the obtained compressor vibration data, and then compensate this compensation current value to the operating current of the compressor, so as to achieve the purpose of suppressing the vibration of the compressor.

[0111] Optionally, the operating frequency of the compressor may be reduced to a first frequency value that is greater than or equal to the torque compensation frequency, so as to avoid triggering the current compensation mechanism and thereby causing a sudden change in the compressor current.

[0112] In step 3, during the preset operating time period, since the operating frequency of the compressor is always above the torque compensation frequency, the current compensation mechanism will not be triggered, which will not cause a sudden change in the compressor current and thus will not lead to compressor protection problems.

[0113] At the same time, during this period of operation, since the operating frequency of the compressor is reduced, the pressure intensity inside the compressor will slowly drop, and the current of the compressor will also slowly drop.

[0114] Step 4: Reduce the operating frequency of the compressor to a second frequency value.

[0115] The second frequency value is a preset lower frequency that is smaller than the torque compensation frequency. By reducing the operating frequency of the compressor to the second frequency value, the pressure intensity inside the compressor can be completely reduced.

[0116] It is worth noting that when the operating frequency of the compressor is reduced to the second frequency value, since the pressure inside the compressor has slowly dropped in the first frequency reduction stage, the operating current has also decreased accordingly. Therefore, even if the current compensation mechanism is triggered because the operating frequency is below the torque compensation frequency at this time, it will not cause a sudden change in the compressor current, and thus will not cause compressor protection problems.

[0117] Step 5: Continue to detect the operating parameter values ​​of the compressor in real time.

[0118] For explanations of the operating parameter values, please refer to the above step 1.

[0119] Step 6: Determine whether the detected operating parameter value is less than the second preset parameter value. If so, execute step 7; otherwise, execute step 8.

[0120] Among them, the second preset parameter value is a pre-set operating parameter threshold used to characterize the relatively low internal pressure of the compressor. Since the first preset parameter value is the pre-set trigger threshold for adaptive frequency reduction, the compressor is under the condition of the first preset parameter value, which indicates that the internal pressure intensity of the compressor is relatively large. Therefore, the second preset parameter value is smaller than the first preset parameter value.

[0121] By comparing the detected operating parameter value with the second preset parameter value, if the operating parameter value is less than the second preset parameter value, it means that the pressure inside the compressor has indeed dropped. At this time, whether it is a rapid frequency reduction or a rapid frequency increase, it will not cause compressor protection problems; and if the operating parameter value is not less than the second preset parameter value, it means that the pressure inside the compressor has not yet dropped completely.

[0122] Step 7: According to the received frequency adjustment command, the operating frequency of the compressor is adjusted to the target frequency indicated by the frequency adjustment command.

[0123] The target frequency indicated by the frequency adjustment command is an operating frequency dynamically determined by the device according to actual needs, and has no direct relationship with the aforementioned torque compensation frequency.

[0124] Step 8: Maintain the operating frequency of the compressor at the second frequency value, and return to step 5.

[0125] If the operating parameter value is not lower than the second preset parameter value, it means that the pressure inside the compressor has not dropped completely, and it is not suitable for rapid frequency reduction or rapid frequency increase at this time. Therefore, the operating frequency of the compressor can be maintained at the second frequency value until the operating parameter value of the compressor is lower than the second preset parameter value, and then the operating frequency of the compressor is adjusted to the target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.

[0126] At this point, the overall implementation process of the compressor frequency control shown in FIG2 is completed.

[0127] Corresponding to the above-mentioned embodiment of the compressor frequency control method, the present application also provides an embodiment of a compressor frequency control device.

[0128] FIG3 is a schematic structural diagram of a compressor frequency control device according to an exemplary embodiment. The device is used to execute the compressor frequency control method provided in any of the above embodiments. As shown in FIG3 , the compressor frequency control device includes:

[0129] a first frequency reduction module 310 configured to reduce the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, and maintain the operating frequency of the compressor at the first frequency value for a preset period of time; the first frequency value is greater than or equal to the torque compensation frequency, and the torque compensation frequency is the compressor frequency that triggers the compressor current compensation mechanism;

[0130] The second frequency reduction module 320 is configured to reduce the operating frequency of the compressor to a second frequency value.

[0131] In a possible implementation manner, a difference between the first frequency value and the torque compensation frequency is smaller than a preset threshold.

[0132] In a possible implementation, the apparatus further includes (not shown in FIG3 ):

[0133] The trigger judgment module is used to obtain the operating parameter value of the compressor; when the obtained operating parameter value exceeds the first preset parameter value, the process of the first frequency reduction module 310 is executed.

[0134] In a possible implementation, the apparatus further includes (not shown in FIG3 ):

[0135] The frequency modulation response module is configured to adjust the operating frequency of the compressor to a target frequency indicated by the frequency adjustment command according to the received frequency adjustment command when the operating parameter value of the compressor does not exceed the first preset parameter value.

[0136] In a possible implementation, the apparatus further includes (not shown in FIG3 ):

[0137] A verification module is configured to obtain an operating parameter value of the compressor after the second frequency reduction module 320 reduces the operating frequency of the compressor to a second frequency value; execute a process of a frequency modulation response module based on the obtained operating parameter value being lower than a second preset parameter value; and maintain the operating frequency of the compressor at the second frequency value based on the obtained operating parameter value being not lower than the second preset parameter value.

[0138] In a possible implementation, the torque compensation frequency is between 45 Hz and 55 Hz.

[0139] In a possible implementation, the operating parameter value of the compressor includes one or more of an operating current of the compressor, a body temperature of the compressor, and a body pressure of the compressor.

[0140] The implementation process of the functions and effects of each unit in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, and will not be repeated here.

[0141] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to the partial description of the method embodiments. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present application scheme. A person of ordinary skill in the art can understand and implement it without paying any creative work.

[0142] An embodiment of the present application further provides an electronic device corresponding to the compressor frequency control method provided in the aforementioned embodiment, so as to execute the aforementioned compressor frequency control method.

[0143] FIG4 is a hardware block diagram of an electronic device according to an exemplary embodiment. The electronic device may be a heat pump clothes dryer or a heat pump air conditioner unit. The electronic device includes a communication interface 601, a processor 602, a memory 603, and a bus 604. The communication interface 601, the processor 602, and the memory 603 communicate with each other via the bus 604. The processor 602 executes the compressor frequency control method described above by reading and executing machine-executable instructions corresponding to the control logic of the compressor frequency control method in the memory 603. The details of this method are described in the above embodiments and are not repeated here.

[0144] The memory 603 mentioned in this application can be any electronic, magnetic, optical, or other physical storage device, and can contain stored information, such as executable instructions, data, and the like. Specifically, the memory 603 can be RAM (Random Access Memory), flash memory, a storage drive (such as a hard disk drive), any type of storage disk (such as an optical disk, DVD, etc.), or similar storage media, or a combination thereof. The communication connection between the system network element and at least one other network element is achieved through at least one communication interface 601 (which can be wired or wireless), and can use the Internet, a wide area network, a local area network, a metropolitan area network, etc.

[0145] The bus 604 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 603 is used to store programs, and the processor 602 executes the programs after receiving an execution instruction.

[0146] The processor 602 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor 602 or an instruction in the form of software. The above-mentioned processor 602 can be a general-purpose processor, including a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The various methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or can be completed by a combination of hardware and software modules in the decoding processor.

[0147] The electronic device provided in the embodiment of the present application and the compressor frequency control method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, operated or implemented by them.

[0148] An embodiment of the present application also provides a computer-readable storage medium corresponding to the compressor frequency control method provided in the aforementioned embodiment. Please refer to Figure 5, where the computer-readable storage medium shown is a CD 30 on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it will execute the compressor frequency control method provided in any of the aforementioned embodiments.

[0149] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0150] The computer-readable storage medium provided in the above-mentioned embodiment of the present application and the compressor frequency control method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, run or implemented by the application program stored therein.

[0151] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0152] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A compressor frequency control method, characterized in that: The method comprises: reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, the first frequency value being greater than or equal to the torque compensation frequency, the torque compensation frequency being a compressor frequency that triggers a compressor current compensation mechanism; Maintaining the operating frequency of the compressor at a first frequency value for a preset period of time; The operating frequency of the compressor is reduced to a second frequency value.

2. The method according to claim 1, characterized in that A difference between the first frequency value and the torque compensation frequency is less than a preset threshold.

3. The method according to claim 1, characterized in that The method further comprises: Obtaining an operating parameter value of the compressor; In the case that the acquired operating parameter value exceeds the first preset parameter value, a step of reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency is performed.

4. The method according to claim 3, characterized in that The method further comprises: In the case that the operating parameter value of the compressor does not exceed the first preset parameter value, according to receiving the frequency adjustment command, the operating frequency of the compressor is adjusted to the target frequency indicated by the frequency adjustment command.

5. The method according to claim 1, characterized in that The method further comprises: After reducing the operating frequency of the compressor to a second frequency value, obtaining an operating parameter value of the compressor; In the case where the acquired operating parameter value is lower than the second preset parameter value, according to the received frequency adjustment command, the operating frequency of the compressor is adjusted to the target frequency indicated by the frequency adjustment command; or, When the acquired operating parameter value is not lower than the second preset parameter value, the operating frequency of the compressor is maintained at the second frequency value.

6. The method according to any one of claims 3 to 5, characterized in that: The operating parameter value of the compressor includes one or more of the operating current of the compressor, the body temperature of the compressor, and the body pressure of the compressor.

7. The method according to any one of claims 1 to 5, characterized in that: The torque compensation frequency is between 45 Hz and 55 Hz.

8. A compressor frequency control device, characterized in that: The device comprises: A first frequency reduction module, configured to reduce the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, and maintain the operating frequency of the compressor at the first frequency value for a preset period of time; the torque compensation frequency is the compressor frequency that triggers the compressor current compensation mechanism; The second frequency reduction module is used to reduce the operating frequency of the compressor to a second frequency value.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: The processor executes the program to implement the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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