Compressor operation control method and apparatus, and air conditioning device and storage medium

Abstract

A compressor operation control method and apparatus, and an air conditioning device and a storage medium. The method comprises: acquiring a target operation frequency of a compressor; if the target operation frequency is less than a set frequency, acquiring an operating current of the compressor; according to M preset frequency-limiting areas, determining a first frequency-limiting area, which is adapted to the operating current of the compressor, wherein each frequency-limiting area is used for limiting the minimum operation frequency of the compressor, and the minimum operation frequency in each frequency-limiting area is less than the set frequency, M being an integer greater than 1; and on the basis of the first frequency-limiting area, controlling the operation frequency of the compressor, such that the operation frequency of the compressor is not less than the minimum operation frequency in the first frequency-limiting area.

Description

Compressor operation control method, device, air conditioning equipment and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311107966.0 filed on August 30, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure belongs to the technical field of low-frequency control of variable-frequency air conditioners, and in particular relates to a compressor operation control method, device, air conditioning equipment, and storage medium. Background Art

[0004] The compressor motor of a variable-frequency air conditioner typically utilizes rotor field-oriented control (FOC). This decouples the compressor motor's direct and quadrature axes within a synchronous coordinate system, achieving decoupled control of torque and magnetic field. This allows AC motors to achieve similar control performance to DC motors. However, vector control is highly dependent on rotor position information. Because conventional rotor position sensors are difficult to use in compressors, a position-observer-less controller (POS) is typically used to estimate rotor position by performing certain transformations and calculations based on the motor current and back-EMF signal. However, at extremely low frequencies, single-rotor compressors face significant load torque fluctuations and low back-EMF signals, making it difficult to accurately estimate the motor's rotor position and, consequently, control stable operation. Therefore, related art requires single-rotor compressors to always operate above a set frequency (e.g., 10 Hz). To control the indoor temperature to the set point, the compressor is typically shut down when the indoor temperature approaches the set point. This reduces the air conditioner's temperature control accuracy, and frequent shutdowns can lead to reduced energy efficiency.

[0005] Summary of the Invention

[0006] The compressor operation control method, device, air-conditioning equipment and storage medium provided in the present disclosure solve the technical problem of low stability of the compressor operating at extremely low frequency.

[0007] In accordance with a first aspect of the present disclosure, a compressor operation control method is provided, including: obtaining a target operating frequency of the compressor; if the target operating frequency is lower than a set frequency, obtaining the operating current of the compressor; determining a first frequency limiting zone that is adapted to the operating current of the compressor based on M preset frequency limiting zones, wherein each of the frequency limiting zones is used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each of the frequency limiting zones is less than the set frequency, and M is an integer greater than 1; and controlling the operating frequency of the compressor based on the first frequency limiting zone so that the operating frequency of the compressor is not lower than the minimum operating frequency of the first frequency limiting zone.

[0008]

[0009] According to the second aspect of the present disclosure, a compressor operation control device is provided, including: a first acquisition unit for acquiring a target operating frequency of the compressor; a second acquisition unit for acquiring the operating current of the compressor if the target operating frequency is lower than the set frequency; a frequency limit determination unit for determining a first frequency limit zone that is adapted to the operating current of the compressor based on M preset frequency limit zones, wherein each of the frequency limit zones is used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each of the frequency limit zones is less than the set frequency, and M is an integer greater than 1; and a frequency control unit for controlling the operating frequency of the compressor based on the first frequency limit zone so that the operating frequency of the compressor is not lower than the minimum operating frequency of the first frequency limit zone.

[0010] According to the third aspect of the present disclosure, an air-conditioning device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the compressor operation control method described in any embodiment of the first aspect is implemented.

[0011] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the compressor operation control method described in any embodiment of the first aspect is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] FIG1 shows a flow chart of a compressor operation control method according to some embodiments of the present disclosure;

[0014] FIG2 shows the corresponding relationship between the frequency limit region and the current threshold in some embodiments of the present disclosure;

[0015] FIG3 shows an execution logic for determining a first frequency limit zone adapted to the operating current of a compressor in some embodiments of the present disclosure;

[0016] FIG4 shows a schematic structural diagram of a compressor operation control device according to some embodiments of the present disclosure;

[0017] FIG5 shows a schematic structural diagram of an air-conditioning device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] The present disclosure provides a compressor operation control method, which is applied to an electrical device with a compressor. The electrical device here can be an air conditioner or a refrigerator. The general idea of ​​the compressor operation control method is as follows: during the operation of the electrical device with a compressor, the target operating frequency of the compressor is obtained; and it is determined whether the target operating frequency of the compressor is lower than the set frequency; if so, the function of the electrical device to control the compressor frequency based on current segmentation is turned on. This function limits the minimum operating frequency of the compressor according to the operating current of the compressor. The greater the operating current of the compressor, the higher the limited minimum operating frequency.

[0021] Figure 1 shows a flow chart of a compressor operation control method according to some embodiments of the present disclosure. Referring to Figure 1 , in order to limit the minimum operating frequency of the compressor according to the operating current of the compressor, the compressor operation control method provided by the present disclosure may include the following steps S101 to S104.

[0022] In step S101 : the target operating frequency of the compressor is obtained.

[0023] In some embodiments, obtaining the target operating frequency of the compressor may include: obtaining the ambient temperature of the operating environment of the electrical device during operation of the electrical device, and determining the target operating frequency of the compressor based on the ambient temperature and a user-set temperature. For example, in an air conditioner, the indoor temperature is collected during operation of the air conditioner, the target operating frequency of the compressor is determined based on the indoor temperature and the user-set temperature, and the actual operating frequency of the compressor is adjusted based on the target operating frequency to bring the indoor temperature closer to the user-set temperature.

[0024] It is understandable that after obtaining the target operating frequency of the compressor, it is determined whether the target operating frequency of the compressor is lower than the set frequency. Since the ambient temperature changes at any time, the user-set temperature will also change due to user resetting. If the obtained target operating frequency of the compressor is not lower than the set frequency, the target operating frequency of the compressor is obtained again after waiting for a preset time interval. If the obtained target operating frequency of the compressor is lower than the set frequency, the function of controlling the compressor frequency based on current segmentation of the electrical equipment is triggered to start. The function of controlling the compressor frequency based on current segmentation requires the execution of the following steps S102 to S104.

[0025] In step S102 : if the target operating frequency of the compressor is lower than the set frequency, the operating current of the compressor is obtained.

[0026] It should be noted that the set frequency is a low-frequency frequency of the compressor. Since the set frequency is related to the performance of the compressor, the set frequency of different compressors is different. The set frequency can be determined based on whether the compressor can operate stably. In some embodiments, for some compressors, stable operation will occur only when the frequency is less than 10Hz, and the set frequency can be 10HZ. In other embodiments, for some compressors, stable operation will occur only when the frequency is less than 30H, and the set frequency can be 30Hz.

[0027] In some embodiments, the obtained working current of the compressor may be the effective value of any phase current of the three-phase current of the compressor motor. In other embodiments, the obtained working current of the compressor may be the average value of the effective values ​​of the three-phase current of the motor.

[0028] In step S103, a first frequency limit zone adapted to the operating current of the compressor is determined based on the preset M frequency limit zones. Each frequency limit zone is used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each frequency limit zone is less than the set frequency, where M is an integer greater than 1.

[0029] It should be noted that the operating current of the compressor is positively correlated with the minimum operating frequency limited by the frequency limit zone. The greater the operating current, the higher the minimum operating frequency of the compressor limited by the first frequency limit zone adapted thereto. Various implementations are possible for determining the first frequency limit zone adapted to the operating current of the compressor based on the M preset frequency limit zones.

[0030] In some embodiments, the compressor's operating current variation range can be pre-divided into M current intervals, each of which corresponds to one of M preset frequency-limiting zones. The smaller the current value in the current interval, the lower the minimum operating frequency of the corresponding frequency-limiting zone. A target current interval for the compressor's operating current is determined from the M preset current intervals, and the frequency-limiting zone corresponding to the target current interval is selected from the M preset frequency-limiting zones as the first frequency-limiting zone.

[0031] M current intervals are formed based on preset M-1 current thresholds, and the target current interval in which the operating current of the compressor is located is determined, including: selecting target current thresholds from the preset M-1 current thresholds in order from large to small, and comparing the operating current of the compressor with the target current threshold selected currently; if the operating current of the compressor is greater than the target current threshold selected currently, select the current interval with the target current threshold selected currently as the lower limit threshold from the M current intervals as the target current interval; otherwise, return to the step of selecting target current thresholds from the preset M-1 current thresholds in order from large to small, so as to select the next target current threshold to compare with the operating current of the compressor.

[0032] In some embodiments, the M current intervals are formed by dividing the operating current variation range of the compressor based on M-1 current thresholds. Figure 2 shows the correspondence between the frequency limiting zone and the current threshold in some embodiments of the present disclosure. As shown in Figure 2, take the division of the operating current variation range of the compressor into three current intervals based on the following two current thresholds Irms1 and Irms2 (Irms2>Irms1) as an example: current>Irms2, Irms1<current≤Irms2 and current≤Irms1. The lowest operating frequency of the frequency limiting zone corresponding to the current interval of current>Irms2 is Fre2, the lowest operating frequency of the frequency limiting zone corresponding to the current interval of Irms1<current≤Irms2 is Fre3, and the lowest operating frequency of the frequency limiting zone corresponding to the current interval of current≤Irms1 is Fre4, satisfying Fre1>Fre2>Fre3>Fre4, and Fre1 is the set frequency of the compressor.

[0033] In other embodiments, M current values ​​may be preset, and the M current values ​​correspond to M frequency limit zones one by one. After obtaining the working current of the compressor, a reference current value and a corresponding frequency limit zone are selected, and an interpolation operation is performed according to an interpolation function to determine a first frequency limit zone that is adapted to the working current of the compressor. Taking linear interpolation as an example, a first reference current value that is closest to and greater than the working current is obtained from the M current values, and a second reference current value that is closest to and less than the working current is obtained from the M current values; a linear interpolation calculation is performed based on the first reference current value and the lowest operating frequency of the corresponding frequency limit zone, the second reference current value and the lowest operating frequency of the corresponding frequency limit zone, and the working current of the compressor to obtain the first frequency limit zone that is adapted to the working current of the compressor.

[0034] In some embodiments, it is also possible not to divide M current intervals, but to directly determine the first frequency limit zone that is adapted to the working current of the compressor based on M-1 current thresholds. That is to say, the working current of the compressor is compared with M-1 current thresholds from large to small, and the first frequency limit zone that is adapted to the working current of the compressor is determined according to the comparison result. Figure 3 shows an execution logic for determining the first frequency limit zone that is adapted to the working current of the compressor in some embodiments of the present disclosure. As shown in Figure 3, taking the example of two current thresholds Irms2 and Irms1 and three frequency limit zones A, B, and C, an execution logic for determining the first frequency limit zone that is adapted to the working current of the compressor in some embodiments of the present disclosure may include:

[0035] Step 1: During the operation of the air-conditioning equipment, obtain the target operating frequency of the compressor;

[0036] Step 2: Determine whether the target operating frequency of the compressor is less than the set frequency Fre1. If so, proceed to step 3; otherwise, return to step 1;

[0037] Step 3: Detect the operating current of the compressor;

[0038] Step 4: Determine whether the operating current of the compressor is greater than the current threshold Irms2. If so, enter the frequency limit area A: limit the operating frequency of the compressor to not less than the minimum operating frequency Fre2 (Fre2 < Fre1). Otherwise, execute step 5.

[0039] Step 5: Determine whether the operating current of the compressor is greater than the current threshold Irms1 (Irms1<Irms2). If so, enter the frequency limit zone B: limit the operating frequency of the compressor to not less than the minimum operating frequency Fre3 (Fre3<Fre2). Otherwise, enter the frequency limit zone C: limit the operating frequency of the compressor to not less than the minimum operating frequency Fre4 (Fre4<Fre3).

[0040] Below, we provide examples of specific numerical values ​​to facilitate understanding of the compressor operation control method provided by the present disclosure: When the target operating frequency of the compressor drops below 10Hz, the segmented frequency limiting function based on the compressor's operating current is enabled: Under this function, the effective value of any phase current of the compressor is detected in real time; when the effective value of the compressor current of that phase is detected to be greater than 9A, the minimum operating frequency of the compressor is limited to 10Hz; when the effective value of the compressor current of that phase is detected to be greater than 7A but not greater than 9A, the minimum operating frequency of the compressor is limited to 8Hz; when the effective value of the compressor current of that phase is detected to be greater than 5A but not greater than 7A, the minimum operating frequency of the compressor is limited to 6Hz. Similarly, the operating frequency of the compressor can be limited in more segments.

[0041] Step S104: controlling the operating frequency of the compressor based on the first frequency limit zone, so that the operating frequency of the compressor is not lower than the lowest operating frequency of the first frequency limit zone.

[0042] It should be understood that, since the operating current of the compressor changes dynamically during the operation of the air-conditioning equipment, it is necessary to continuously obtain the operating current of the compressor when the target operating frequency of the compressor is lower than the set frequency. Therefore, after the operating frequency of the compressor is controlled based on the first frequency limiting zone, as the operating current of the compressor changes, other frequency limiting zones corresponding to the changed operating current of the compressor and different from the first frequency limiting zone will be re-determined. Thus, during the time period when the target operating frequency of the compressor is lower than the set frequency, the current frequency limiting zone will switch between different frequency limiting zones.

[0043] In some embodiments, in order to prevent the frequency limiting frequency from repeatedly changing due to slight current fluctuations, a certain hysteresis may be set when switching between different frequency limiting regions.

[0044] It is understood that after controlling the compressor's operating frequency based on the first frequency limiting zone, if the compressor's operating current decreases to less than the first current threshold, the compressor's operating frequency is switched to being controlled based on the second frequency limiting zone, such that the compressor's operating frequency does not fall below the minimum operating frequency of the second frequency limiting zone. In one embodiment, the first current threshold may be the difference between an upper threshold of the current interval corresponding to the second frequency limiting zone and a preset hysteresis value. The second frequency limiting zone is one of the M frequency limiting zones, and the minimum operating frequency of the third frequency limiting zone is greater than the minimum operating frequency of the first frequency limiting zone.

[0045] It is understood that after controlling the operating frequency of the compressor based on the first frequency limiting zone, if the operating current of the compressor increases to greater than the second current threshold, the operating frequency of the compressor is switched to being controlled based on the third frequency limiting zone, so that the operating frequency of the compressor does not fall below the minimum operating frequency of the third frequency limiting zone. In one embodiment, the second current threshold may be the sum of a lower threshold of the current interval corresponding to the third frequency limiting zone and a preset hysteresis value. The third frequency limiting zone is one of M frequency limiting zones, and the minimum operating frequency of the third frequency limiting zone is greater than the minimum operating frequency of the first frequency limiting zone.

[0046] Continuing to refer to Figure 3, an example is given in which the operating frequency of the compressor is currently controlled in the frequency limit zone B: if the operating current of the compressor changes to less than Irms1-Irat, it will switch from the frequency limit zone B to the frequency limit zone C to control the operating frequency of the compressor; if the operating current of the compressor changes to greater than Irms2+Irat, it will switch from the frequency limit zone B to the frequency limit zone A to control the operating frequency of the compressor.

[0047] It should be noted that the compressor operation control method provided by one or more embodiments of the present disclosure can be applied to control any type of compressor, so that in the low-frequency stage of the compressor, the minimum operating frequency of the compressor is limited in segments according to the working current of the compressor, thereby maintaining the back electromotive force signal strength, so as to be able to accurately estimate the rotor position under the influence of interference and noise.

[0048] Since the load of a single-rotor compressor is periodically related to the rotor angle, the greater the load of the air-conditioning equipment, the greater the load fluctuation amplitude, the higher the effective value of the current and the greater the fluctuation. In this case, large fluctuations in speed and current will seriously affect the accuracy of position observation, and in severe cases will cause excessive position observation errors, leading to motor stall. Since one or more embodiments of the present disclosure can maintain sufficient back-electromotive force signal strength, the single-rotor compressor can still accurately estimate the rotor position even when affected by load fluctuations. Furthermore, the single-rotor compressor can operate at an extremely low frequency when the air-conditioning capacity demand is very low, ensuring the low-frequency stability and load-carrying capacity of the single-rotor compressor. When the energy demand of the air-conditioning equipment is very low, there is no need to frequently start and stop the compressor, thereby improving the overall operating efficiency and temperature control accuracy of the air-conditioning.

[0049] According to some embodiments of the present disclosure, a compressor operation control device is also provided. FIG4 shows a schematic structural diagram of a compressor operation control device according to some embodiments of the present disclosure. As shown in FIG4 , the compressor operation control device includes: a first acquisition unit 401, for acquiring the target operating frequency of the compressor; a second acquisition unit 402, for acquiring the working current of the compressor if the target operating frequency is lower than the set frequency; a frequency limit determination unit 403, for determining a first frequency limit zone adapted to the working current of the compressor based on M preset frequency limit zones, each frequency limit zone being used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each frequency limit zone being less than the set frequency, and M being an integer greater than 1; a frequency control unit 404, for controlling the operating frequency of the compressor based on the first frequency limit zone, so that the operating frequency of the compressor is not lower than the minimum operating frequency of the first frequency limit zone.

[0050] In some embodiments, the frequency limit determination unit 403 may include: a first determination subunit, used to determine the target current interval in which the working current is located from the preset M current intervals, the M current intervals corresponding one-to-one to the M frequency limit zones, wherein the smaller the current value of the current interval, the lower the minimum operating frequency of the corresponding frequency limit zone; a second determination subunit, used to select the frequency limit zone corresponding to the target current interval from the M frequency limit zones as the first frequency limit zone.

[0051] In some embodiments, the first determination subunit can be used to: select a target current threshold from the preset M-1 current thresholds in descending order, and M current intervals are formed based on the M-1 current thresholds; compare the operating current of the compressor with the target current threshold currently selected; if the operating current of the compressor is greater than the target current threshold currently selected, select a current interval with the target current threshold currently selected as the lower limit threshold from the M current intervals as the target current interval.

[0052] In some embodiments, the device may further include: a first switching unit, for switching to controlling the operating frequency of the compressor based on the second frequency limiting zone if the operating current of the compressor decreases to less than the first current threshold after controlling the operating frequency of the compressor based on the first frequency limiting zone, so that the operating frequency of the compressor is not lower than the minimum operating frequency of the second frequency limiting zone; the first current threshold is the difference between the upper limit threshold of the current interval corresponding to the second frequency limiting zone and the preset hysteresis value, the second frequency limiting zone is one of the M frequency limiting zones, and the minimum operating frequency of the second frequency limiting zone is lower than the minimum operating frequency of the first frequency limiting zone.

[0053] In some embodiments, the device may further include: a second switching unit, for switching to controlling the operating frequency of the compressor based on the third frequency limiting zone if the operating current of the compressor increases to greater than the second current threshold after controlling the operating frequency of the compressor based on the first frequency limiting zone, so that the operating frequency of the compressor is not lower than the minimum operating frequency of the third frequency limiting zone; the second current threshold is the sum of the lower limit threshold of the current interval corresponding to the third frequency limiting zone and the preset hysteresis value, the third frequency limiting zone is one of the M frequency limiting zones, and the minimum operating frequency of the third frequency limiting zone is greater than the minimum operating frequency of the first frequency limiting zone.

[0054] In some embodiments, the first acquiring unit 401 may be configured to: if the target operating frequency is not greater than the set frequency, re-acquire the target operating frequency of the compressor after waiting for a preset time interval.

[0055] In some embodiments, the first acquiring unit 401 may be configured to: acquire the ambient temperature and the user-set temperature; and determine the target operating frequency of the compressor according to the ambient temperature and the user-set temperature.

[0056] The compressor operation control device can be used to implement the aforementioned compressor operation control method. More implementation details of the compressor operation control device can refer to the aforementioned compressor operation control method. For the sake of brevity of the specification, they will not be repeated here.

[0057] According to some embodiments of the present disclosure, an air conditioning device is also provided. FIG5 shows a schematic structural diagram of an air conditioning device according to some embodiments of the present disclosure. As shown in FIG5 , the air conditioning device may include: a memory 504, a processor 502, and a computer program stored in the memory 504 and executable on the processor 502. When the processor 502 executes the computer program, it implements the compressor operation control method of any of the aforementioned embodiments.

[0058] In FIG5 , a bus architecture (represented by bus 500) is shown. Bus 500 may include any number of interconnected buses and bridges, and bus 500 links various circuits together, including one or more processors represented by processor 502 and memory represented by memory 504. Bus 500 may also link various other circuits together, such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and, therefore, will not be described further herein. Bus interface 505 provides an interface between bus 500 and receiver 501 and transmitter 503. Receiver 501 and transmitter 503 may be the same component, namely a transceiver, which provides a unit for communicating with various other devices over a transmission medium. Processor 502 is responsible for managing bus 500 and general processing, while memory 504 may be used to store data used by processor 502 when performing operations.

[0059] Based on the same inventive concept, the present disclosure further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the compressor operation control method described in any of the aforementioned embodiments is implemented.

[0060] In the technical solution according to some embodiments of the present disclosure, it is recorded that the target operating frequency of the compressor is obtained; if the target operating frequency is lower than the set frequency, the working current of the compressor is obtained; a first frequency limiting zone adapted to the working current of the compressor is determined based on the preset M frequency limiting zones, wherein each frequency limiting zone is used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each frequency limiting zone is less than the set frequency, and M is an integer greater than 1; the operating frequency of the compressor is controlled based on the first frequency limiting zone so that the operating frequency of the compressor is not lower than the minimum operating frequency of the first frequency limiting zone. The above technical solution can limit the minimum operating frequency of the compressor in sections according to the compressor current limit during the operation of the compressor at an extremely low frequency. The compressor can be operated safely and stably at an extremely low frequency without the need to frequently start and stop the compressor when the energy demand is very low, thereby improving the overall operating efficiency and temperature control accuracy.

[0061] Although some embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present disclosure.

[0062] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations.

Claims

1. A compressor operation control method, comprising: Obtaining the target operating frequency of the compressor; If the target operating frequency is lower than the set frequency, obtaining the operating current of the compressor; According to the preset M frequency limiting zones, a first frequency limiting zone adapted to the working current of the compressor is determined, wherein each of the frequency limiting zones is used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each of the frequency limiting zones is less than the set frequency, and M is an integer greater than 1; as well as The operating frequency of the compressor is controlled based on the first frequency limit range so that the operating frequency of the compressor is not lower than the lowest operating frequency of the first frequency limit range.

2. The method of claim 1, wherein: The determining, based on the preset M frequency limit zones, a first frequency limit zone adapted to the working current of the compressor comprises: Determine a target current interval where the working current is located from the preset M current intervals, wherein the M current intervals correspond to the M frequency-limited zones one by one, wherein the smaller the current value of the current interval is, the lower the minimum operating frequency of the corresponding frequency-limited zone is; and A frequency limiting zone corresponding to the target current interval is selected from the M frequency limiting zones as the first frequency limiting zone.

3. The method of claim 2, wherein: The step of determining the target current interval where the working current is located from among the preset M current intervals includes: Selecting a target current threshold from the preset M-1 current thresholds in descending order, wherein the M current intervals are formed based on the M-1 current thresholds; comparing the operating current of the compressor with the currently selected target current threshold; and If the operating current of the compressor is greater than the target current threshold selected this time, a current interval with the target current threshold selected this time as the lower limit threshold is selected from the M current intervals as the target current interval.

4. The method according to any one of claims 1 to 3, wherein: After controlling the operating frequency of the compressor based on the first frequency limit zone, the method further includes: If the operating current of the compressor decreases to less than the first current threshold, switching to controlling the operating frequency of the compressor based on the second frequency limit zone so that the operating frequency of the compressor is not lower than the lowest operating frequency of the second frequency limit zone; Among them, the first current threshold is the difference between the upper threshold of the current interval corresponding to the second frequency limiting zone and the preset hysteresis value, the second frequency limiting zone is one of the M frequency limiting zones, and the minimum operating frequency of the second frequency limiting zone is less than the minimum operating frequency of the first frequency limiting zone.

5. The method according to any one of claims 1 to 4, wherein: After controlling the operating frequency of the compressor based on the first frequency limit zone, the method further includes: If the operating current of the compressor increases to be greater than the second current threshold, switching to controlling the operating frequency of the compressor based on the third frequency limit zone so that the operating frequency of the compressor is not lower than the lowest operating frequency of the third frequency limit zone; Among them, the second current threshold is the sum of the lower limit threshold of the current interval corresponding to the third frequency limiting zone and the preset hysteresis value, the third frequency limiting zone is one of the M frequency limiting zones, and the minimum operating frequency of the third frequency limiting zone is greater than the minimum operating frequency of the first frequency limiting zone.

6. The method according to any one of claims 1 to 5, wherein: After obtaining the target operating frequency of the compressor, the method further includes: If the target operating frequency is not greater than the set frequency, the target operating frequency of the compressor is re-acquired after waiting for a preset time interval.

7. The method according to any one of claims 1 to 6, wherein: The obtaining of the target operating frequency of the compressor includes: Get the ambient temperature and the user set temperature; and The target operating frequency of the compressor is determined according to the ambient temperature and the user set temperature.

8. A compressor operation control device, comprising: A first acquisition unit, used to acquire a target operating frequency of the compressor; A second acquisition unit, configured to acquire the operating current of the compressor if the target operating frequency is lower than a set frequency; A frequency limit determination unit, configured to determine a first frequency limit zone adapted to the working current of the compressor according to M preset frequency limit zones, wherein each of the frequency limit zones is used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each of the frequency limit zones is less than the set frequency, and M is an integer greater than 1; as well as A frequency control unit is used to control the operating frequency of the compressor based on the first frequency limit zone so that the operating frequency of the compressor is not lower than the lowest operating frequency of the first frequency limit zone.

9. An air conditioning device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the compressor operation control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, comprising a computer program stored thereon, wherein the computer program, when executed by a processor, implements the compressor operation control method according to any one of claims 1 to 7.

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