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

Abstract

The invention discloses a compressor operation control method and device, air conditioning equipment and a storage medium. The method comprises the steps that the target operation frequency of a compressor is obtained; if the target operation frequency is lower than the set frequency, the working current of the compressor is obtained; according to preset M frequency limiting areas, a first frequency limiting area matched with the working current of the compressor is determined, the frequency limiting areas are used for limiting the lowest operation frequency of the compressor, the lowest operation frequency of each frequency limiting area is smaller than the set frequency, and M is an integer larger than 1; and controlling the operation frequency of the compressor based on the first frequency limiting region, so that the operation frequency of the compressor is not lower than the lowest operation frequency of the first frequency limiting region. The technical problem that the operation stability of the compressor at the extremely low frequency is not high is solved.

Description

Technical Field

[0001] The present invention 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

[0002] The compressor motor of the variable frequency air conditioner usually adopts rotor magnetic field oriented control, decoupling the direct axis and quadrature axis of the motor in the synchronous coordinate system, thereby realizing the decoupling control of torque and magnetic field, so that the AC motor can obtain good control performance similar to that of the DC motor. However, the vector control effect is very dependent on the rotor position information. Since ordinary rotor position sensors are difficult to use in compressors, a positionless observer is generally used to perform certain transformations and calculations based on the motor current and back-EMF signals to estimate the rotor position. However, at extremely low frequencies, due to large load torque fluctuations and low back-EMF signals, the single-rotor compressor cannot accurately estimate the motor rotor position and cannot operate stably. Therefore, in the relevant technology, it is necessary to control the single-rotor compressor to always run above the set frequency (for example: 10Hz). This will cause the compressor to stop running when the indoor temperature is close to the set temperature in order to control the indoor temperature. This will reduce the temperature control accuracy of the air conditioner, and frequent shutdowns will lead to reduced energy efficiency. Summary of the invention

[0003] The compressor operation control method, device, air conditioning equipment and storage medium provided by the present invention solve the technical problem of low stability of the compressor operating at an extremely low frequency.

[0004] In a first aspect of the present invention, a compressor operation control method is provided, comprising: 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; 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.

[0005] In combination with the first aspect, in some embodiments, determining the first frequency limiting zone that is adapted to the working current of the compressor based on the preset M frequency limiting zones includes: determining the target current interval where the working current is located from the preset M current intervals, the M current intervals corresponding one-to-one to the M frequency limiting zones, wherein the smaller the current value of the current interval, the lower the minimum operating frequency of the corresponding frequency limiting zone; selecting the frequency limiting zone corresponding to the target current interval from the M frequency limiting zones as the first frequency limiting zone.

[0006] In combination with the first aspect, in some embodiments, determining the target current interval in which the working current is located from the preset M current intervals includes: selecting the target current threshold from the preset M-1 current thresholds in order from large to small, and the M current intervals are formed based on the M-1 current thresholds; comparing the working current of the compressor with the target current threshold selected currently; if the working current of the compressor is greater than the target current threshold selected currently, selecting a current interval with the target current threshold selected currently as the lower limit threshold from the M current intervals as the target current interval.

[0007] In combination with the first aspect, in some embodiments, after controlling the operating frequency of the compressor based on the first frequency limiting zone, it also 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 limiting zone so that the operating frequency of the compressor is not lower than the minimum operating frequency of the second frequency limiting zone; wherein 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 less than the minimum operating frequency of the first frequency limiting zone.

[0008] In combination with the first aspect, in some embodiments, after controlling the operating frequency of the compressor based on the first frequency limiting zone, it also 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 limiting zone so that the operating frequency of the compressor is not lower than the minimum operating frequency of the third frequency limiting zone; wherein the second current threshold is the sum of the 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 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.

[0009] In combination with the first aspect, in some embodiments, after obtaining the target operating frequency of the compressor, it also includes: if the target operating frequency is not greater than the set frequency, after waiting for a preset time interval, re-obtaining the target operating frequency of the compressor.

[0010] In combination with the first aspect, in some embodiments, obtaining the target operating frequency of the compressor includes: obtaining an ambient temperature and a user-set temperature; and determining the target operating frequency of the compressor based on the ambient temperature and the user-set temperature.

[0011] In a second aspect of the present invention, a compressor operation control device is provided, comprising: a first acquisition unit, used to acquire a target operating frequency of the compressor; a second acquisition unit, used to acquire the working current of the compressor if the target operating frequency is lower than a set frequency; a frequency limit determination unit, used to determine a first frequency limit zone that is adapted to the working 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; a frequency control unit, 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 minimum operating frequency of the first frequency limit zone.

[0012] In a third aspect of the present invention, 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.

[0013] In a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the compressor operation control method described in any embodiment of the first aspect is implemented.

[0014] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0015] Obtain the target operating frequency of the compressor; if the target operating frequency is lower than the set frequency, obtain the working current of the compressor; determine the first limited frequency zone that is adapted to the working current of the compressor according to the preset M limited frequency zones, wherein each limited frequency zone is used to limit the minimum operating frequency of the compressor, and the minimum operating frequency of each limited frequency zone is less than the set frequency, and M is an integer greater than 1; control the operating frequency of the compressor based on the first limited frequency zone, so that the operating frequency of the compressor is not lower than the minimum operating frequency of the first limited frequency 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A flow chart showing a compressor operation control method according to an embodiment of the present invention is shown;

[0018] Figure 2 The corresponding relationship between the frequency limiting area and the current threshold in the embodiment of the present invention is shown;

[0019] Figure 3 An execution logic for determining a first frequency limit zone adapted to the working current of the compressor in an embodiment of the present invention is shown;

[0020] Figure 4 A schematic diagram of the structure of a compressor operation control device according to an embodiment of the present invention is shown;

[0021] Figure 5 A schematic structural diagram of an air conditioning device in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 data used in this way can be interchanged where appropriate, so that the embodiments of the present invention 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The present invention 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 is to limit the minimum operating frequency of the compressor according to the working current of the compressor, wherein the larger the working current, the higher the limited minimum operating frequency.

[0025] Figure 1 FIG. 2 shows the flow of the compressor operation control method according to an embodiment of the present invention. Figure 1 As shown, in order to limit the minimum operating frequency of the compressor according to the working current of the compressor, the compressor operation control method provided by the present invention may include the following steps S101 to S104.

[0026] S101: Obtaining a target operating frequency of a compressor.

[0027] In some embodiments, obtaining the target operating frequency of the compressor may include: obtaining the ambient temperature of the working environment of the electrical device during the operation of the electrical device, and determining the target operating frequency of the compressor according to the ambient temperature and the user-set temperature. Taking an air-conditioning device as an example, the indoor temperature is collected during the operation of the air-conditioning device, the target operating frequency of the compressor is determined according to the indoor temperature and the user-set temperature, and the actual operating frequency of the compressor is adjusted according to the target operating frequency so that the indoor temperature is close to the user-set temperature.

[0028] 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 the user's re-setting. 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:

[0029] S102: If the target operating frequency of the compressor is lower than the set frequency, the operating current of the compressor is obtained.

[0030] It should be noted that the set frequency is a low-frequency frequency of the compressor. However, the size of the set frequency is related to the performance of the compressor, so the set frequencies of different compressors are different. The set frequency can be determined based on whether the compressor can run stably. For example: For some compressors, the frequency cannot run stably if it is less than 10Hz, so the set frequency can be 10HZ; for some compressors, the frequency cannot run stably if it is less than 30H, so the set frequency can be 30Hz.

[0031] 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.

[0032] S103: According to the preset M frequency limit zones, determine the first frequency limit zone adapted to the working current of the compressor, wherein 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, and M is an integer greater than 1.

[0033] It should be noted that the working current of the compressor is positively correlated with the minimum operating frequency limited by the frequency limit zone. The larger the working current, the higher the minimum operating frequency limited by the first frequency limit zone adapted thereto. There may be multiple implementations to determine the first frequency limit zone adapted to the working current of the compressor based on the preset M frequency limit zones.

[0034] In some embodiments, the operating current variation range of the compressor can be divided into M current intervals in advance, and the M current intervals correspond to the preset M frequency limiting zones one by one. The smaller the current value of the current interval, the lower the minimum operating frequency of the corresponding frequency limiting zone. From the preset M current intervals, determine the target current interval where the operating current of the compressor is located, and select the frequency limiting zone corresponding to the target current interval from the preset M frequency limiting zones as the first frequency limiting zone.

[0035] The M current intervals are formed based on the preset M-1 current thresholds, and the target current interval in which the working current of the compressor is located is determined, including: selecting the target current threshold from the preset M-1 current thresholds in order from large to small, and comparing the working current of the compressor with the target current threshold selected currently; if the working current of the compressor is greater than the target current threshold selected currently, from the M current intervals, a current interval with the target current threshold selected currently as the lower limit threshold is selected as the target current interval; otherwise, return to execute the step of selecting the target current threshold 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 working current of the compressor.

[0036] In some implementations, the M current intervals are formed by dividing the operating current variation range of the compressor based on M-1 current thresholds. Figure 2 The corresponding relationship between the frequency limiting area and the current threshold in the embodiment of the present invention is shown. Figure 2 As shown, the compressor operating current variation range is divided 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. Among them, the lowest operating frequency of the frequency-limited zone corresponding to the current interval of current>Irms2 is Fre2, the lowest operating frequency of the frequency-limited zone corresponding to the current interval of Irms1<current≤Irms2 is Fre3, and the lowest operating frequency of the frequency-limited 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.

[0037] In other embodiments, M current values ​​may be preset, and the M current values ​​correspond one to one with the M frequency limit zones. 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 matches 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 minimum operating frequency of the corresponding frequency limit zone, the second reference current value and the minimum operating frequency of the corresponding frequency limit zone, and the working current of the compressor to obtain the first frequency limit zone that matches the working current of the compressor.

[0038] In some implementations, the M current intervals may not be divided, but the first frequency limit zone adapted to the working current of the compressor may be determined directly based on the M-1 current thresholds. That is, the working current of the compressor is compared with the M-1 current thresholds from large to small, and the first frequency limit zone adapted to the working current of the compressor is determined according to the comparison result. Figure 3 FIG. 1 shows an execution logic for determining the first frequency limit region adapted to the working current of the compressor in an embodiment of the present invention. Figure 3 As shown, two current thresholds Irms2 and Irms1 and three frequency limit zones A, B, and C are preset as an example for explanation:

[0039] Step 1: During the operation of the air-conditioning equipment, the target operating frequency of the compressor is obtained;

[0040] 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;

[0041] Step 3: Detect the operating current of the compressor;

[0042] Step 4: Determine whether the working current of the compressor is greater than the current threshold value 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;

[0043] Step 5: Determine whether the operating current of the compressor is greater than the current threshold value Irms1 (Irms1<Irms2). If so, enter the frequency limiting zone B: limit the operating frequency of the compressor to not less than the minimum operating frequency Fre3 (Fre3<Fre2). Otherwise, enter the frequency limiting zone C: limit the operating frequency of the compressor to not less than the minimum operating frequency Fre4 (Fre4<Fre3).

[0044] Below, an example of specific numerical values ​​is given to facilitate understanding of the compressor operation control method provided by the present invention: when the target operating frequency of the compressor is reduced to below 10Hz, the function of segmented frequency limiting based on the working current of the compressor is turned on: under this function, the effective value of any phase current of the compressor is detected in real time; when the effective value of the current of this phase of the compressor is detected to be greater than 9A, the minimum operating frequency of the compressor is limited to 10Hz; when the effective value of the current of this phase of the compressor is detected to be greater than 7A and not greater than 9A, the minimum operating frequency of the compressor is limited to 8Hz; when the effective value of the current of this phase of the compressor is detected to be greater than 5A and not greater than 7A, the minimum operating frequency of the compressor is limited to 6Hz. By analogy, the operating frequency of the compressor can be limited in more segments.

[0045] 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.

[0046] It should be understood that, during the operation of the air-conditioning equipment, the working current of the compressor changes dynamically. When the target operating frequency of the compressor is lower than the set frequency, it is necessary to continuously obtain the working current of the compressor. Therefore, after the operating frequency of the compressor is controlled based on the first limited frequency zone, as the working current of the compressor changes, other limited frequency zones corresponding to the changed working current of the compressor and different from the first limited frequency 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 limited frequency zone will switch between different limited frequency zones.

[0047] In some implementations, in order to prevent the frequency limiting frequency from changing repeatedly due to slight current fluctuations, a certain hysteresis may be set when switching between different frequency limiting regions.

[0048] It is understandable that after the operating frequency of the compressor is controlled based on the first frequency limiting zone, if the operating current of the compressor decreases to less than the first current threshold, the operating frequency of the compressor is switched to be controlled based on the second 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 may be 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 third frequency limiting zone is greater than the minimum operating frequency of the first frequency limiting zone.

[0049] It can be understood that after the operating frequency of the compressor is controlled based on the first frequency limiting zone, if the operating current of the compressor increases to be greater than the second current threshold, the operating frequency of the compressor is switched to be controlled based on the third frequency limiting zone, so that the operating frequency of the compressor is not lower than the lowest operating frequency of the third frequency limiting zone. The second current threshold may be the sum of the lower 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 lowest operating frequency of the third frequency limiting zone is greater than the lowest operating frequency of the first frequency limiting zone.

[0050] Continue to refer Figure 3 , taking the current control of the compressor operating frequency in the frequency limit zone B as an example: if the compressor's operating current changes to less than Irms1-Irat, it will switch from the frequency limit zone B to the frequency limit zone C to control the compressor's operating frequency; if the compressor's operating current changes to greater than Irms2+Irat, it will switch from the frequency limit zone B to the frequency limit zone A to control the compressor's operating frequency.

[0051] It should be noted that the compressor operation control method provided by one or more embodiments of the present invention can be applied to controlling 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.

[0052] 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. At this time, large fluctuations in speed and current will seriously affect the accuracy of position observation, and in severe cases will cause excessive position observation errors and cause the motor to stall. Since one or more embodiments of the present invention can maintain sufficient back-electromotive force signal strength, the single-rotor compressor can still accurately estimate the rotor position even under the influence of load fluctuations. Furthermore, the single-rotor compressor can operate at an extremely low frequency when the air-conditioning capacity demand is very low, thereby 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.

[0053] Based on the same inventive concept, the present invention provides a compressor operation control device. Figure 4 FIG. 2 shows a schematic diagram of the structure of a compressor operation control device according to an embodiment of the present invention. Figure 4As shown, the compressor operation control device includes: a first acquisition unit 401, used to acquire the target operating frequency of the compressor; a second acquisition unit 402, used to acquire the working current of the compressor if the target operating frequency is lower than the set frequency; a frequency limit determination unit 403, used to determine a first frequency limit zone that is adapted to the working current of the compressor according to M preset frequency limit zones, wherein 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, and M is an integer greater than 1; a frequency control unit 404, 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 minimum operating frequency of the first frequency limit zone.

[0054] In some embodiments, the frequency limit determination unit 403 includes: a first determination subunit, used to determine the target current interval where the working current is located from the preset M current intervals, the M current intervals correspond 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.

[0055] In some embodiments, the first determination subunit can be used to: select a target current threshold from preset M-1 current thresholds in order from large to small, 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 selected currently; if the operating current of the compressor is greater than the target current threshold selected currently, select a current interval with the target current threshold selected currently as the lower limit threshold from the M current intervals as the target current interval.

[0056] In some embodiments, the device may also include: a first switching unit, used to switch 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; wherein 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 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.

[0057] In some embodiments, the device may also include: a second switching unit, which is used to switch to controlling the operating frequency of the compressor based on the third frequency limiting zone after controlling the operating frequency of the compressor based on the first frequency limiting zone, if the operating current of the compressor increases to be greater than the second current threshold, so that the operating frequency of the compressor is not lower than the minimum operating frequency of the third frequency limiting zone; wherein the second current threshold is the sum of the 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.

[0058] In some implementations, the first acquisition 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.

[0059] In some implementations, the first acquisition unit 401 may be used 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.

[0060] 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.

[0061] Based on the same inventive concept, the present invention also provides an air conditioning device. Figure 5 FIG. 2 shows a schematic diagram of the structure of an air conditioning device in an embodiment of the present invention. Figure 5 As shown, 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 program, the compressor operation control method of any of the aforementioned embodiments is implemented.

[0062] Among them, Figure 5In the embodiment of the present invention, a bus architecture (represented by bus 500) is shown, which may include any number of interconnected buses and bridges, and bus 500 links various circuits including one or more processors represented by processor 502 and memory represented by memory 504. Bus 500 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described 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 element, namely a transceiver, providing 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.

[0063] Based on the same inventive concept, the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the compressor operation control method described in any of the aforementioned embodiments is implemented.

[0064] Although some embodiments of the present invention 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 invention.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A compressor operation control method, characterized in that: include: 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; 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 according to claim 1, characterized in that 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; 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 according to claim 2, characterized in that 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 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; 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 claim 3, characterized in that 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 claim 4, characterized in that 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, characterized in that: 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 5, characterized in that: The obtaining of the target operating frequency of the compressor includes: Get the ambient temperature and user-set temperature; 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, characterized in that: include: 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; 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, characterized in that: The method comprises 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 having a computer program stored thereon, characterized in that: When the program is executed by a processor, the compressor operation control method described in any one of claims 1 to 7 is implemented.

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