Compressor operation control methods, devices, air conditioning equipment and storage media

Abstract

This invention discloses a compressor operation control method, device, air conditioning equipment, and storage medium. The method includes: obtaining the target operating frequency of the compressor; if the target operating frequency is lower than a set frequency, obtaining the compressor's operating current; determining a first frequency limiting zone adapted to the compressor's operating current based on M preset frequency limiting zones, wherein the frequency limiting zone is used to limit the compressor's minimum operating frequency, and the minimum operating frequency of each frequency limiting zone is lower than the set frequency, and M is an integer greater than 1; controlling the compressor's operating frequency based on the first frequency limiting zone to ensure that the compressor's operating frequency is not lower than the minimum operating frequency of the first frequency limiting zone. This invention solves the technical problem of low stability of compressors operating at extremely low frequencies.

Description

Technical Field

[0001] This invention belongs to the field of low-frequency control technology of variable frequency air conditioners, and particularly relates to a compressor operation control method, device, air conditioning equipment and storage medium. Background Technology

[0002] Variable frequency air conditioner compressor motors typically employ rotor field-oriented control, decoupling the motor's direct and quadrature axes in a synchronous coordinate system to achieve decoupled control of torque and magnetic field, allowing AC motors to achieve control performance similar to DC motors. However, vector control effectiveness is highly dependent on rotor position information. Since ordinary rotor position sensors are difficult to use in compressors, a position observer-less approach is generally employed, estimating the rotor position based on transformations and calculations using motor current and back EMF signals. However, at extremely low frequencies, single-rotor compressors suffer from large load torque fluctuations and low back EMF signals, making it impossible to accurately estimate the motor rotor position and consequently, unstable operation. Therefore, related technologies require controlling the single-rotor compressor to always operate above a set frequency (e.g., 10Hz). This can lead to the compressor stopping when the indoor temperature approaches the set temperature in order to control the indoor temperature. This results in reduced air conditioner temperature control accuracy, and frequent shutdowns can lead to decreased 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 compressor operation at extremely low frequencies.

[0004] In a first aspect of the present invention, a compressor operation control method is provided, comprising: acquiring a target operating frequency of the compressor; if the target operating frequency is lower than a set frequency, acquiring the operating current of the compressor; determining a first frequency limiting zone adapted to the operating current of the compressor according to M preset frequency limiting zones, wherein each frequency limiting zone is used to limit a 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; 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 conjunction with the first aspect, in some embodiments, determining the first frequency limiting zone adapted to the operating current of the compressor based on the preset M frequency limiting zones includes: determining the target current range where the operating current is located from the preset M current ranges, wherein the M current ranges correspond one-to-one with the M frequency limiting zones, wherein the smaller the current value of the current range, the lower the minimum operating frequency of the corresponding frequency limiting zone; and selecting the frequency limiting zone corresponding to the target current range from the M frequency limiting zones as the first frequency limiting zone.

[0006] In conjunction with the first aspect, in some embodiments, determining the target current range from the preset M current ranges includes: selecting target current thresholds sequentially from the preset M-1 current thresholds in descending order, wherein the M current ranges are formed based on the M-1 current thresholds; comparing the compressor's operating current with the currently selected target current threshold; and if the compressor's operating current is greater than the currently selected target current threshold, selecting a current range from the M current ranges with the currently selected target current threshold as the lower limit threshold as the target current range.

[0007] In conjunction with the first aspect, in some embodiments, after controlling the operating frequency of the compressor based on the first frequency limiting zone, the method further includes: if the operating current of the compressor decreases to less than a first current threshold, switching to controlling the operating frequency of the compressor based on a 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 range 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 second frequency limiting zone is less than the minimum operating frequency of the first frequency limiting zone.

[0008] In conjunction with the first aspect, in some embodiments, after controlling the operating frequency of the compressor based on the first frequency limiting zone, the method further includes: if the operating current of the compressor increases to a level greater than a second current threshold, switching to controlling the operating frequency of the compressor based on a 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 limit 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 conjunction with the first aspect, in some embodiments, 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, after waiting for a preset time interval, re-obtaining the target operating frequency of the compressor.

[0010] In conjunction with the first aspect, in some embodiments, obtaining the target operating frequency of the compressor includes: obtaining the ambient temperature and the 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 invention, a compressor operation control device is provided, comprising: 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 a set frequency; a frequency limiting determination unit for determining a first frequency limiting zone adapted to the operating current of the compressor based on M preset frequency limiting zones, wherein each frequency limiting zone is used to limit a 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; and a frequency control unit for 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.

[0012] In a third aspect of the invention, an air conditioning device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the compressor operation control method described in any embodiment of the first aspect.

[0013] In a fourth aspect of the invention, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the compressor operation control method described in any embodiment of the first aspect.

[0014] The embodiments of the present invention provide one or more technical solutions that achieve at least the following technical effects or advantages:

[0015] The process involves obtaining the compressor's target operating frequency; if the target operating frequency is lower than the set frequency, obtaining the compressor's operating current; determining a first frequency limiting zone adapted to the compressor's operating current based on M preset frequency limiting zones, where each frequency limiting zone restricts the compressor's minimum operating frequency, and the minimum operating frequency of each frequency limiting zone is lower than the set frequency, and M is an integer greater than 1; controlling the compressor's operating frequency based on the first frequency limiting zone to ensure that the compressor's operating frequency is not lower than the minimum operating frequency of the first frequency limiting zone. This technical solution enables the compressor to operate safely and stably at extremely low frequencies by segmenting the minimum operating frequency based on the compressor current limit during operation. This allows the compressor to operate safely and stably at extremely low frequencies without frequent start-stop cycles when energy demand is very low, improving overall operating efficiency and temperature control accuracy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart of the compressor operation control method in an embodiment of the present invention is shown;

[0018] Figure 2 The correspondence between the frequency limiting region and the current threshold is shown in an embodiment of the present invention;

[0019] Figure 3 This invention illustrates an execution logic for determining a first frequency limiting zone adapted to the operating current of the compressor in an embodiment of the present invention;

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

[0021] Figure 5 A schematic diagram of the structure of an air conditioning device in an embodiment of the present invention is shown. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] This invention provides a compressor operation control method applied to electrical equipment with a compressor. This electrical equipment 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 equipment with a compressor, the target operating frequency of the compressor is obtained; it is then determined whether the target operating frequency is lower than a set frequency; if so, the function of current-based segmented control of the compressor frequency is activated. This function limits the minimum operating frequency of the compressor based on its operating current, wherein the higher the operating current, the higher the limited minimum operating frequency.

[0025] Figure 1 The flowchart of the compressor operation control method in an embodiment of the present invention is shown. (Reference) Figure 1 As shown, in order to limit the minimum operating frequency of the compressor based on the compressor's operating current, the compressor operation control method provided by the present invention may include the following steps S101 to S104.

[0026] S101: Obtain the target operating frequency of the compressor.

[0027] In some implementations, obtaining the target operating frequency of the compressor may include: acquiring the ambient temperature of the environment in which the electrical equipment operates during operation, and determining the target operating frequency of the compressor based on the ambient temperature and the user-set temperature. Taking an air conditioning unit as an example, the indoor temperature is collected during the operation of the air conditioning unit, 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 according to the target operating frequency to make the indoor temperature close to the user-set temperature.

[0028] Understandably, after obtaining the compressor's target operating frequency, it is determined whether the compressor's target operating frequency is lower than the set frequency. Since ambient temperature changes constantly, the user-set temperature will also change due to user resets. If the obtained compressor's target operating frequency is not lower than the set frequency, the compressor's target operating frequency is obtained again after a preset time interval. If the obtained compressor's target operating frequency is lower than the set frequency, the current-segmented compressor frequency control function of the electrical equipment is triggered. This current-segmented compressor frequency control function requires executing the following steps S102~S104:

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

[0030] It should be noted that the set frequency refers to the low-frequency range of the compressor. However, the set frequency is related to the compressor's performance; therefore, different compressors have different set frequencies. The set frequency can be determined based on whether the compressor can operate stably. For example, some compressors cannot operate stably at frequencies below 10Hz, so the set frequency can be 10Hz; for other compressors, a frequency below 30Hz is insufficient for stable operation, so the set frequency can be 30Hz.

[0031] In some embodiments, the obtained compressor operating current can be the effective value of any one phase current of the three-phase current of the compressor motor; in other embodiments, the obtained compressor operating current can be the average value of the effective values ​​of the three-phase current of the motor.

[0032] S103: Based on the preset M frequency limiting zones, determine the first frequency limiting zone that is compatible with the compressor's operating current. Each frequency limiting zone is used to limit the compressor's minimum operating frequency, and the minimum operating frequency of each frequency limiting zone is less than the set frequency. M is an integer greater than 1.

[0033] It should be noted that the compressor's operating current is positively correlated with the minimum operating frequency limited by the frequency limiting zone. The higher the operating current, the higher the minimum operating frequency limited by the first frequency limiting zone. There are multiple implementation methods to determine the first frequency limiting zone that matches the compressor's operating current based on M preset frequency limiting zones.

[0034] In some implementations, the operating current variation range of the compressor can be pre-divided into M current intervals, with each of the M current intervals corresponding to a preset M frequency limiting zone. The smaller the current value in the current interval, the lower the minimum operating frequency of the corresponding frequency limiting zone. From the preset M current intervals, a target current interval in which the compressor's operating current lies is determined, and the frequency limiting zone corresponding to the target current interval is selected 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. Determining the target current interval for the compressor's operating current includes: selecting target current thresholds sequentially from the preset M-1 current thresholds in descending order; comparing the compressor's operating current with the currently selected target current threshold; if the compressor's operating current is greater than the currently selected target current threshold, selecting the current interval from the M current intervals with the currently selected target current threshold as the lower limit as the target current interval; otherwise, returning to the step of selecting target current thresholds sequentially from the preset M-1 current thresholds in descending order, to select the next target current threshold for comparison with the compressor's operating current.

[0036] In some implementations, the M current ranges are divided into the range of operating current variation of the compressor based on M-1 current thresholds. Figure 2 The correspondence between the frequency limiting region and the current threshold is shown in an embodiment of the present invention. For example... Figure 2 As shown, taking the division of the compressor's operating current variation range 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 > Irms2 is Fre2, the lowest operating frequency of the frequency limiting zone corresponding to the current interval Irms1 < current ≤ Irms2 is Fre3, and the lowest operating frequency of the frequency limiting zone corresponding to the current interval ≤ Irms1 is Fre4, satisfying Fre1 > Fre2 > Fre3 > Fre4, where Fre1 is the compressor's set frequency.

[0037] In other implementations, M current values ​​can be preset, each corresponding to one of M frequency limiting zones. After obtaining the compressor's operating current, a reference current value and its corresponding frequency limiting zone are selected, and interpolation is performed using an interpolation function to determine the first frequency limiting zone adapted to the compressor's operating current. Taking linear interpolation as an example, the first reference current value, which is closest to and greater than the operating current among the M current values, is obtained; the second reference current value, which is closest to and less than the operating current among the M current values, is obtained; based on the first reference current value and the minimum operating frequency of the corresponding frequency limiting zone, the second reference current value and the minimum operating frequency of the corresponding frequency limiting zone, and the compressor's operating current, linear interpolation is performed to obtain the first frequency limiting zone adapted to the compressor's operating current.

[0038] In some implementations, instead of dividing the current into M intervals, the first frequency limiting zone adapted to the compressor's operating current can be determined directly based on M-1 current thresholds. That is, the compressor's operating current is compared with the M-1 current thresholds from largest to smallest, and the first frequency limiting zone adapted to the compressor's operating current is determined based on the comparison results. Figure 3 This illustration shows an execution logic for determining a first frequency limiting region adapted to the compressor's operating current in an embodiment of the present invention. For example... Figure 3 As shown, the following example illustrates the concept of two preset current thresholds, Irms2 and Irms1, and three frequency limiting regions, A, B, and C:

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

[0040] Step 2: Determine if the compressor's target operating frequency is less than the set frequency Fre1. If yes, proceed to Step 3; otherwise, return to Step 1.

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

[0042] Step 4: Determine whether the compressor's operating current is greater than the current threshold Irms2. If so, enter frequency limiting zone A: limit the compressor's operating frequency to not be lower than the minimum operating frequency Fre2 (Fre2 < Fre1). Otherwise, proceed to step 5.

[0043] Step 5: Determine whether the compressor's operating current is greater than the current threshold Irms1 (Irms1 < Irms2). If so, enter frequency limiting zone B: limit the compressor's operating frequency to no less than the minimum operating frequency Fre3 (Fre3 < Fre2). Otherwise, enter frequency limiting zone C: limit the compressor's operating frequency to no less than the minimum operating frequency Fre4 (Fre4 < Fre3).

[0044] Below are specific numerical examples to facilitate understanding of the compressor operation control method provided by this invention: When the target operating frequency of the compressor drops below 10Hz, the function of segmented frequency limiting based on the compressor's operating current is activated: Under this function, the effective value of the current of any one phase of the compressor is detected in real time; when the effective value of the current of that 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 that phase of the compressor 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 current of that phase of the compressor is detected to be greater than 5A but not greater than 7A, the minimum operating frequency of the compressor is limited to 6Hz. And so on, the operating frequency of the compressor can be limited in more segments.

[0045] S104: Control the compressor's operating frequency based on the first frequency limiting zone so that the compressor's operating frequency is not lower than the minimum operating frequency of the first frequency limiting zone.

[0046] It should be understood that the compressor's operating current changes dynamically during the operation of air conditioning equipment. When the compressor's target operating frequency is lower than the set frequency, it is necessary to continuously monitor the compressor's operating current. Therefore, after controlling the compressor's operating frequency based on the first frequency limiting zone, as the compressor's operating current changes, other frequency limiting zones corresponding to the changed operating current and different from the first frequency limiting zone will be redefined. Thus, during periods when the compressor's target operating frequency is lower than the set frequency, the current frequency limiting zone will switch between different frequency limiting zones.

[0047] In some implementations, to avoid repeated changes in the frequency limiting frequency caused by minute current fluctuations, a certain hysteresis can be set when switching between different frequency limiting zones.

[0048] Understandably, after controlling the compressor's operating frequency based on the first frequency limiting zone, if the compressor's operating current decreases to below the first current threshold, the system switches to controlling the compressor's operating frequency based on the second frequency limiting zone to ensure that the compressor's operating frequency is not lower than the minimum operating frequency of the second frequency limiting zone. The first current threshold can be the difference between the upper limit of the current range corresponding to the second frequency limiting zone and a preset hysteresis value. The second 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.

[0049] Understandably, after controlling the compressor's operating frequency based on the first frequency limiting zone, if the compressor's operating current increases to exceed the second current threshold, the system switches to controlling the compressor's operating frequency based on the third frequency limiting zone to ensure that the compressor's operating frequency is not lower than the minimum operating frequency of the third frequency limiting zone. The second current threshold can be the sum of the lower limit threshold of the current range 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.

[0050] Continue to refer to Figure 3 For example, if the compressor's operating frequency is currently controlled in frequency limiting zone B, the frequency will switch from frequency limiting zone B to frequency limiting zone C to control the compressor's operating frequency. If the compressor's operating current changes to be less than Irms1-Irat, the frequency will switch from frequency limiting zone B to frequency limiting 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 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 operating current of the compressor, thereby maintaining the back EMF signal strength, so as to accurately estimate the rotor position under the influence of interference and noise.

[0052] Because the load of a single-rotor compressor exhibits a periodicity related to the rotor angle, the greater the load on the air conditioning unit, the greater the load fluctuation amplitude, and the higher and more volatile the effective current value. In this case, large fluctuations in speed and current can severely affect the accuracy of position observation, potentially leading to excessive position observation errors and motor stall. However, according to one or more embodiments of this invention, sufficient back EMF signal strength can be maintained, enabling the single-rotor compressor to accurately estimate the rotor position even under load fluctuations. This allows the single-rotor compressor to operate at extremely low frequencies when air conditioning demand is very low, ensuring its low-frequency stability and load-carrying capacity. Frequent compressor start-stop operations are unnecessary when the air conditioning unit's energy demand is very low, improving the overall operating efficiency and temperature control accuracy of the air conditioning system.

[0053] Based on the same inventive concept, the present invention provides a compressor operation control device. Figure 4 A schematic diagram of the compressor operation control device in an embodiment of the present invention is shown. 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 operating current of the compressor if the target operating frequency is lower than the set frequency; a frequency limiting determination unit 403, used to determine a first frequency limiting zone adapted to the operating current of the compressor according to M preset 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; and a frequency control unit 404, used to control 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.

[0054] In some embodiments, the frequency limiting determination unit 403 includes: a first determining subunit, used to determine the target current range where the operating current is located from M preset current ranges, wherein the M current ranges correspond one-to-one with the M frequency limiting zones, and the lower the current value of the current range, the lower the minimum operating frequency of the corresponding frequency limiting zone; and a second determining subunit, used to select the frequency limiting zone corresponding to the target current range from the M frequency limiting zones as the first frequency limiting zone.

[0055] In some implementations, the first determining subunit may be used to: select a target current threshold sequentially from a preset M-1 current thresholds in descending order, wherein the M current intervals are formed based on the M-1 current thresholds; compare the compressor's operating current with the currently selected target current threshold; if the compressor's operating current is greater than the currently selected target current threshold, select a current interval from the M current intervals with the currently selected target current threshold as the target current interval.

[0056] In some embodiments, the device may further include: a first switching unit, configured to, after controlling the operating frequency of the compressor based on a first frequency limiting zone, switch to controlling the operating frequency of the compressor based on a second frequency limiting zone if the operating current of the compressor decreases to less than a first current threshold, 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 range corresponding to the second frequency limiting zone and a 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 less than the minimum operating frequency of the first frequency limiting zone.

[0057] In some embodiments, the device may further include: a second switching unit, configured to, after controlling the operating frequency of the compressor based on the first frequency limiting zone, switch to controlling the operating frequency of the compressor based on the third frequency limiting zone if the operating current of the compressor increases to a level greater than a 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 limit threshold of the current range 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 used to: if the target operating frequency is not greater than the set frequency, after waiting for a preset time interval, reacquire the target operating frequency of the compressor.

[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 based on 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 be found in the aforementioned compressor operation control method. For the sake of brevity, these details will not be repeated here.

[0061] Based on the same inventive concept, the present invention also provides an air conditioning device. Figure 5 A schematic diagram of the structure of an air conditioning device according to an embodiment of the present invention is shown. 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, it implements the compressor operation control method of any of the aforementioned embodiments.

[0062] Among them, Figure 5In this document, a bus architecture (represented by bus 500) is used. Bus 500 may include any number of interconnected buses and bridges, linking 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 peripheral devices, voltage regulators, and power management circuits, 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 element, i.e., 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 can be used to store data used by processor 502 during operation.

[0063] Based on the same inventive concept, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the compressor operation control method described in any of the foregoing embodiments.

[0064] Although some embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0065] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A compressor operation control method, characterized in that, include: Obtain the target operating frequency of the compressor; If the target operating frequency is lower than the set frequency, obtain the operating current of the compressor; Based on M preset frequency limiting zones, a first frequency limiting zone adapted to the operating current of the compressor is determined, including: determining a target current range where the operating current is located from the M preset current ranges, wherein the M current ranges correspond one-to-one with the M frequency limiting zones, wherein the smaller the current value of the current range, the lower the minimum operating frequency of the corresponding frequency limiting zone; selecting a frequency limiting zone corresponding to the target current range from the M frequency limiting zones as the first frequency limiting zone, 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 compressor's operating frequency is controlled based on the first frequency limiting zone to ensure that the compressor's operating frequency is not lower than the minimum operating frequency of the first frequency limiting zone.

2. The method as described in claim 1, characterized in that, Determining the target current range from the preset M current ranges includes: The target current threshold is selected from the preset M-1 current thresholds in descending order, and the M current intervals are formed based on the M-1 current thresholds; Compare the compressor's operating current with the currently selected target current threshold; If the operating current of the compressor is greater than the target current threshold selected in the current time, the current interval with the target current threshold selected in the current time as the lower limit threshold is selected from the M current intervals as the target current interval.

3. The method as described in claim 2, characterized in that, After controlling the compressor's operating frequency based on the first frequency limiting zone, the method further includes: 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; Wherein, the first current threshold is the difference between the upper limit threshold of the current range 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 lowest operating frequency of the second frequency limiting zone is less than the lowest operating frequency of the first frequency limiting zone.

4. The method as described in claim 3, characterized in that, After controlling the compressor's operating frequency based on the first frequency limiting zone, the method further includes: If the operating current of the compressor increases to a level 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 minimum operating frequency of the third frequency limiting zone. Wherein, 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 lowest operating frequency of the third frequency limiting zone is greater than the lowest operating frequency of the first frequency limiting zone.

5. The method according to any one of claims 1-4, 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 reacquired after a preset time interval.

6. The method according to any one of claims 1-4, characterized in that, The process of obtaining the target operating frequency of the compressor includes: Get the ambient temperature and the user-set temperature; The target operating frequency of the compressor is determined based on the ambient temperature and the user-set temperature.

7. A compressor operation control device, characterized in that, include: The first acquisition unit is used to acquire the target operating frequency of the compressor; The second acquisition unit is used to acquire the operating current of the compressor if the target operating frequency is lower than the set frequency; The frequency limiting determination unit is used to determine a first frequency limiting zone adapted to the operating current of the compressor based on M preset frequency limiting zones. This includes: determining a target current range containing the operating current from M preset current ranges, where each of the M current ranges corresponds to one of the M frequency limiting zones; selecting a frequency limiting zone corresponding to the target current range from the M frequency limiting zones as the first frequency limiting zone; 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, where 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 limiting zone, so that the operating frequency of the compressor is not lower than the minimum operating frequency of the first frequency limiting zone.

8. An air conditioning device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the compressor operation control method according to any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the compressor operation control method according to any one of claims 1-6.

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