Heat pump unit control method and device, storage medium and heat pump unit

Abstract

The application discloses a heat pump unit control method and device, a storage medium and a heat pump unit, relates to the technical field of heat pump control, and the method comprises the following steps: in response to a unit shutdown instruction for the heat pump unit, the fan is controlled to run at a target fan frequency, and the compressor is controlled to run at a target compressor frequency; if the fan continues to run for more than or equal to a predetermined time threshold after being reduced to the target fan frequency, and the fan drive board temperature of the fan is less than or equal to a first temperature threshold, the compressor is controlled to stop running; if the compressor stops running and the fan meets a predetermined stop running condition, the fan is controlled to stop running. The application can prevent the fan drive board element from being damaged due to excessive temperature while reliably ensuring the rapid balance of high and low pressures after the heat pump unit system stops.

Description

Technical Field

[0001] This application relates to the field of heat pump control technology, specifically to a heat pump unit control method, device, storage medium, and heat pump unit. Background Technology

[0002] During the operation of a heat pump inverter air-cooled chiller / hot water unit, the heat generated by the inverter compressor drive board and the DC fan drive board during normal operation needs to be carried away by liquid refrigerant flowing through the heat dissipation plate channel. During the normal operation of the heat pump unit, it is necessary to keep the power module temperature of the inverter compressor drive board and the DC fan drive board at all times to avoid damage to the drive board components.

[0003] During normal operation of the heat pump unit, the compressor ensures the normal flow of refrigerant, ensuring the rapid removal of heat from the compressor drive board and the DC fan drive board. However, in the relevant shutdown logic, to ensure rapid balance of high and low refrigerant pressure in the heat pump unit system, after receiving the shutdown command, the heat pump unit directly controls the compressor frequency to drop to the minimum operating frequency and then shuts down the compressor, while the fan waits for the compressor to completely stop running for a period of time before stopping.

[0004] The current unit shutdown sequence causes the refrigerant to stop flowing after the compressor stops completely, while the fan drive board is still working and generating heat. The temperature of the power module of the fan drive board rises sharply, which leads to damage to the components of the fan drive board. Summary of the Invention

[0005] This application provides a heat pump unit control scheme that can prevent damage to the fan drive board components due to excessive temperature, while also reliably ensuring rapid balance of high and low pressures after the heat pump unit system is shut down.

[0006] The embodiments of this application provide the following technical solutions:

[0007] According to one embodiment of this application, a heat pump unit control method is provided. The heat pump unit includes a fan and a compressor. The heat pump unit control method includes: in response to a unit shutdown command for the heat pump unit, controlling the fan to operate at a target fan frequency and controlling the compressor to operate at a target compressor frequency; if the fan continues to operate for a time greater than or equal to a predetermined time threshold after being reduced to the target fan frequency, and the temperature of the fan drive plate of the fan is detected to be less than or equal to a first temperature threshold, then controlling the compressor to stop operating; if the compressor stops operating and the fan is detected to meet predetermined shutdown conditions, then controlling the fan to stop operating.

[0008] In some embodiments of this application, the step of controlling the fan to stop operating if the compressor stops running and the fan is detected to meet a predetermined stop operation condition includes: if the compressor stops running, detecting whether the temperature of the fan drive board of the fan rises to a second temperature threshold, the second temperature threshold being greater than the first temperature threshold; if the temperature of the fan drive board is detected to rise to the second temperature threshold, then controlling the fan to stop operating.

[0009] In some embodiments of this application, controlling the fan to operate at a target fan frequency and controlling the compressor to operate at a target compressor frequency includes: controlling the fan to operate at a minimum fan frequency; and controlling the compressor to operate at a minimum compressor frequency, wherein the target fan frequency includes the minimum fan frequency and the target compressor frequency includes the minimum compressor frequency.

[0010] In some embodiments of this application, controlling the fan to operate at a target fan frequency and controlling the compressor to operate at a target compressor frequency includes: determining a matching fan frequency and a matching compressor frequency that match the predetermined unit parameters of the heat pump unit; controlling the fan to operate at the matching fan frequency and controlling the compressor to operate at the matching compressor frequency.

[0011] In some embodiments of this application, controlling the compressor to stop operating includes: if the target compressor frequency is equal to the minimum compressor frequency of the compressor, then shutting down the compressor; if the target compressor frequency is not equal to the minimum compressor frequency of the compressor, then controlling the compressor frequency of the compressor to decrease to the minimum compressor frequency and shutting down the compressor.

[0012] In some embodiments of this application, the step of controlling the fan to stop operating if the compressor stops running and the fan is detected to meet the predetermined stop conditions includes: if it is detected that the fan continues to operate at the target fan frequency for more than the predetermined stop time after the compressor stops running, then the fan is controlled to stop operating.

[0013] In some embodiments of this application, the first temperature threshold and the predetermined time threshold are obtained in one of the following ways: obtaining the first temperature threshold and the predetermined time threshold according to predetermined heat pump control configuration parameters; or obtaining the first temperature threshold and the predetermined time threshold by querying the threshold matching the predetermined unit parameters corresponding to the heat pump unit.

[0014] According to one embodiment of this application, a heat pump unit control device includes: a memory storing a computer program; and a processor reading the computer program stored in the memory to execute the heat pump unit control method described in any one of this application.

[0015] According to another embodiment of this application, a storage medium stores a computer program thereon, which, when executed by a processor, implements the heat pump unit control method described in any one of this application.

[0016] According to another embodiment of this application, a heat pump unit includes: the heat pump unit control device described in any embodiment of this application.

[0017] According to another embodiment of this application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of a heat pump unit reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the heat pump unit to perform the methods provided in the various optional implementations described in the embodiments of this application.

[0018] In this embodiment of the application, the heat pump unit includes a fan and a compressor. The heat pump unit control method includes: in response to a unit shutdown command for the heat pump unit, controlling the fan to operate at a target fan frequency and controlling the compressor to operate at a target compressor frequency; if the fan continues to operate for a time greater than or equal to a predetermined time threshold after being reduced to the target fan frequency, and the temperature of the fan drive plate of the fan is detected to be less than or equal to a first temperature threshold, then controlling the compressor to stop operating; if the compressor stops operating and the fan is detected to meet predetermined shutdown conditions, then controlling the fan to stop operating.

[0019] In this way, upon receiving a unit shutdown command, the frequencies of the fan and compressor are reduced respectively. If the fan continues to operate at the target fan frequency for a period of time greater than or equal to a predetermined time threshold and the temperature of the fan drive board is less than or equal to a first temperature threshold, the compressor is controlled to stop operating. At this time, the fan continues to operate at the reduced target fan frequency to quickly balance the refrigerant system pressure. Then, if the fan is detected to meet the predetermined shutdown conditions, the fan is controlled to stop operating to prevent the temperature of the power module of the fan drive board from rising sharply. Thus, the overall system not only prevents damage to the fan drive board components due to overheating but also reliably ensures rapid balance of high and low pressures after the heat pump unit system is shut down. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A flowchart of a heat pump unit control method according to an embodiment of this application is shown.

[0022] Figure 2 A flowchart of a wind turbine shutdown control process according to an embodiment of this application is shown.

[0023] Figure 3 A block diagram of a heat pump unit control device according to an embodiment of this application is shown. Detailed Implementation

[0024] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments provided herein are merely illustrative of the present disclosure and are not intended to limit the present disclosure. Furthermore, the embodiments provided below are some embodiments for implementing the present disclosure, and not all embodiments for implementing the present disclosure. Unless otherwise specified, the technical solutions described in the embodiments of the present disclosure can be implemented in any combination.

[0025] It should be noted that, in the embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a method or apparatus that includes a list of elements includes not only the elements expressly described, but also other elements not expressly listed, or elements inherent to implementing the method or apparatus. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other related elements (e.g., steps in the method or units in the apparatus, such as portions of circuitry, processors, programs, or software, etc.) in the method or apparatus that includes that element.

[0026] For example, the heat pump unit control method provided in the embodiments of this disclosure includes a series of steps, but the heat pump unit control method provided in the embodiments of this disclosure is not limited to the steps described. Similarly, the heat pump unit control device provided in the embodiments of this disclosure includes a series of units, but the device provided in the embodiments of this disclosure is not limited to the units explicitly described, but may also include units that need to be set up for obtaining relevant information or processing based on information.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0028] Figure 1 A flowchart illustrating a heat pump unit control method according to an embodiment of this application is shown schematically. The heat pump unit may include a fan, a compressor, and other heat pump components. Figure 1 As shown, the heat pump unit control method may include steps S110 to S130.

[0029] Step S110: In response to the unit shutdown command for the heat pump unit, control the fan to operate at a target fan frequency and control the compressor to operate at a target compressor frequency; Step S120: If the fan continues to operate at the target fan frequency for a time greater than or equal to a predetermined time threshold, and the temperature of the fan drive plate is detected to be less than or equal to a first temperature threshold, then control the compressor to stop operating; Step S130: If the compressor stops operating and the fan is detected to meet predetermined stop operating conditions, then control the fan to stop operating.

[0030] The unit shutdown command is used to control the entire heat pump unit to shut down and stop operation. The unit shutdown command can be triggered by the relevant user or triggered autonomously by the heat pump unit. This application does not make any specific limitations in comparison.

[0031] The fan drive board temperature refers to the measured temperature of the fan drive board itself, which can specifically be the temperature of the power module within the fan drive board. This temperature can be detected using a pre-set sensor.

[0032] Upon receiving the unit shutdown command, the fan operates at its current frequency, and the compressor operates at its current frequency. The target fan frequency can be less than or equal to the current fan frequency, and the target compressor frequency can be less than or equal to the current compressor frequency.

[0033] In response to a unit shutdown command for the heat pump unit, the fan is controlled to operate at a target fan frequency f1, and the compressor is controlled to operate at a target compressor frequency f2. Next, the fan drive plate temperature T1 and the fan operating time (i.e., the time the fan operates at the target fan frequency) a are determined. If the fan drive plate temperature T1 ≤ t1 (a first temperature threshold) and the fan operating time a ≥ a1 (a predetermined time threshold), the compressor is controlled to stop operating. After the compressor stops operating, the fan continues to operate at the target fan frequency f1. If the fan meets the predetermined shutdown conditions, the fan is controlled to stop operating.

[0034] Among them, the temperature T1 of the fan drive board and the operating time of the fan (i.e., the time when the fan continues to operate at the target fan frequency after dropping to the target fan frequency) a are judged. If the temperature T1 of the fan drive board < t1 (the first temperature threshold) or the operating time a of the fan < a1 (the predetermined time threshold), the compressor will not be controlled to stop operating, that is, the compressor will continue to operate at the target compressor frequency f2 until the temperature T1 of the fan drive board ≤ t1 (the first temperature threshold) and the operating time a of the fan ≥ a1 (the predetermined time threshold). At this time, the compressor is controlled to stop operating.

[0035] In this way, after receiving the unit shutdown instruction, the frequencies of the fan and the compressor are respectively reduced for operation. When the time that the fan continues to operate at the target fan frequency after dropping to the target fan frequency is greater than or equal to the predetermined time threshold and the temperature of the fan drive board of the fan is less than or equal to the first temperature threshold, the compressor is controlled to stop operating. At this time, the fan continues to operate at the reduced target fan frequency, so as to quickly balance the refrigerant system pressure. Then, when it is detected that the fan meets the predetermined stop operating conditions, the fan is controlled to stop operating, avoiding the rapid rise of the power module temperature of the fan drive board. Furthermore, overall, while preventing the components of the fan drive board from being damaged due to excessive temperature, it also reliably ensures the rapid balance of the high and low pressures after the heat pump unit system shuts down.

[0036] The following further describes Figure 1 Under the embodiment, when controlling the heat pump unit, the further optional specific embodiments under each step.

[0037] In one embodiment, in step S110, controlling the fan to drop to the target fan frequency for operation and controlling the compressor to drop to the target compressor frequency for operation includes: controlling the fan to drop to the lowest fan frequency for operation; and, controlling the compressor to drop to the lowest compressor frequency for operation. The target fan frequency includes the lowest fan frequency, and the target compressor frequency includes the lowest compressor frequency.

[0038] The lowest fan frequency is the lowest frequency of the fan, and the lowest compressor frequency is the lowest frequency of the compressor. In this embodiment, after receiving the unit shutdown instruction, by default, the fan is directly controlled to drop to the lowest fan frequency for operation, and, the compressor is controlled to drop to the lowest compressor frequency for operation.

[0039] For example, at the moment of receiving the unit shutdown instruction, the fan is operating at the current fan frequency and the compressor is operating at the current compressor frequency. In response to the unit shutdown instruction, the fan can be controlled to drop from the current fan frequency to the lowest fan frequency for operation, and the compressor can be controlled to drop from the current compressor frequency to the lowest compressor frequency for operation.

[0040] In another optional embodiment, step S110, controlling the fan to operate at the target fan frequency and controlling the compressor to operate at the target compressor frequency, includes: determining the matching fan frequency and matching compressor frequency that match the predetermined unit parameters according to the predetermined unit parameters of the heat pump unit; controlling the fan to operate at the matching fan frequency and controlling the compressor to operate at the matching compressor frequency.

[0041] The predetermined unit parameters of a heat pump unit refer to one or more parameters specified in the unit's relevant parameters. The predetermined unit parameters are defined as "the predetermined unit parameters corresponding to the heat pump unit in real time at the moment the unit shutdown command is received." For example, predetermined unit parameters may include one or more of the following: current fan frequency, current compressor frequency, current compressor drive board temperature corresponding to the compressor drive board, current fan drive board temperature corresponding to the fan drive board, and operating parameters of other components in the heat pump unit.

[0042] From the preset frequency lookup table, you can dynamically and in real-time query the matching fan frequency and matching compressor frequency for the predetermined unit parameters. This matching fan frequency is usually a frequency lower than the current fan frequency; it can be understood that, under some predetermined unit parameters, this matching fan frequency can be equal to the minimum fan frequency. Similarly, this matching compressor frequency is usually a frequency lower than the current compressor frequency; it can be understood that, under some predetermined unit parameters, this matching compressor frequency can be equal to the minimum compressor frequency.

[0043] In this embodiment, after receiving the unit shutdown command, the matching fan frequency and matching compressor frequency for the predetermined unit parameters are first determined. Then, the fan is controlled to run at the matching fan frequency, and the compressor is controlled to run at the matching compressor frequency.

[0044] For example, when a unit shutdown command is received, the fan is operating at its current fan frequency and the compressor is operating at its current compressor frequency. In response to the unit shutdown command, the fan can be controlled to reduce its operating frequency from the current fan frequency to the matching fan frequency, and the compressor can be controlled to reduce its operating frequency from the current compressor frequency to the matching compressor frequency.

[0045] Furthermore, in step S120, controlling the compressor to stop running may specifically include:

[0046] If the target compressor frequency is equal to the compressor's minimum compressor frequency, then the compressor is shut down; if the target compressor frequency is not equal to the compressor's minimum compressor frequency, then the compressor frequency is controlled to decrease to the minimum compressor frequency and the compressor is shut down.

[0047] The compressor operates at the target compressor frequency. When deciding to stop the compressor, if the target compressor frequency is equal to the compressor's minimum compressor frequency, the compressor can be shut down directly.

[0048] If the target compressor frequency is not equal to the compressor's minimum compressor frequency, then the compressor frequency is controlled to decrease to the minimum compressor frequency before shutting down the compressor. For example, if the target compressor frequency is the matched compressor frequency, and the matched compressor frequency is not the minimum compressor frequency, then the compressor frequency can be controlled to decrease from the matched compressor frequency to the minimum compressor frequency before shutting down the compressor.

[0049] For further details, please refer to [link / reference]. Figure 2 In one embodiment, step S130, whereby if the compressor stops running and the fan is detected to meet predetermined shutdown conditions, then controlling the fan to stop running, may specifically include:

[0050] Step S210: If the compressor stops running, detect whether the temperature of the fan drive board of the fan rises to a second temperature threshold, where the second temperature threshold is greater than the first temperature threshold; Step S220: If the temperature of the fan drive board is detected to rise to the second temperature threshold, control the fan to stop running.

[0051] In step S120 of the aforementioned embodiment, if the fan operates at the target fan frequency for a period of time greater than or equal to a predetermined time threshold, and the temperature of the fan drive plate is detected to be less than or equal to a first temperature threshold, then the compressor is controlled to stop operating. The fan continues to operate at the target fan frequency.

[0052] In this embodiment, after the compressor stops running (i.e., the compressor is turned off), if the temperature of the fan drive board is further detected to rise to a second temperature threshold, which is a threshold greater than the first temperature threshold, then the fan is promptly controlled to stop running. The difference between the second temperature threshold and the first temperature threshold can be less than a predetermined difference.

[0053] Furthermore, when the fan continues to operate at the target fan frequency, and the temperature of the fan drive board rises to the second temperature threshold due to poor heat dissipation, the fan immediately stops operating. At this time, the power module of the fan drive board has reserved sufficient margin to allow the temperature of the power module to continue to rise, thus avoiding damage to the power module of the fan drive board due to excessive temperature.

[0054] Optionally, in another embodiment, step S130, which involves controlling the fan to stop operating if the compressor stops running and the fan is detected to meet predetermined shutdown conditions, may specifically include:

[0055] If it is detected that the fan continues to operate at the target fan frequency for more than the predetermined stop time after the compressor stops operating, the fan is controlled to stop operating.

[0056] In step S120 of the aforementioned embodiment, if the time during which the fan continues to operate at the target fan frequency after decreasing to the target fan frequency is greater than or equal to a predetermined time threshold, and the temperature of the fan drive board is detected to be less than or equal to a first temperature threshold, then the compressor is controlled to stop operating. The fan continues to operate at the target fan frequency.

[0057] In this embodiment, after the compressor stops running (i.e., the compressor is turned off), if it is detected that the fan continues to run at the target fan frequency for more than the predetermined stop time, the fan will be stopped in a timely manner. The predetermined stop time can be set according to the actual situation.

[0058] Furthermore, when the fan continues to operate at the target fan frequency, if the fan continues to operate at the target fan frequency for a predetermined stop time, the fan will stop immediately. At this time, the power module of the fan drive board can also reserve sufficient margin to allow the temperature of the power module to continue to rise, thus avoiding damage to the power module of the fan drive board due to excessive temperature.

[0059] Furthermore, in the foregoing embodiments of this application, the first temperature threshold and the predetermined time threshold can be obtained in one of the following ways:

[0060] The first method involves obtaining the first temperature threshold and the predetermined time threshold based on predetermined heat pump control configuration parameters.

[0061] The second method involves querying the threshold values ​​that match the predetermined unit parameters corresponding to the heat pump unit to obtain the first temperature threshold and the predetermined time threshold.

[0062] In the first approach, a first temperature threshold and a predetermined time threshold are obtained based on predetermined heat pump control configuration parameters. These predetermined heat pump control configuration parameters are those specified by the relevant user, and include the first temperature threshold and the predetermined time threshold configured for the heat pump unit. It can be understood that the predetermined heat pump control configuration parameters may also include parameters such as a minimum fan frequency, a minimum compressor frequency, and a second temperature threshold configured for the heat pump unit.

[0063] In the second approach, based on the predetermined unit parameters corresponding to the heat pump unit, the threshold values ​​matching the predetermined unit parameters can be dynamically queried from a preset parameter table. These threshold values ​​include a first temperature threshold and a predetermined time threshold matching the current state of the heat pump unit. Dynamically querying the first temperature threshold and predetermined time threshold matching the current state of the heat pump unit can further improve the protection effect of the heat pump unit's fan drive board components. It can be understood that the matching threshold values ​​may also include a second temperature threshold.

[0064] To facilitate better implementation of the heat pump unit control method provided in this application, this application also provides a heat pump unit control device based on the above-described heat pump unit control method. The meanings of the terms used are the same as in the above-described heat pump unit control method, and specific implementation details can be found in the descriptions in the method embodiments. Figure 3 A block diagram of a heat pump unit control device according to an embodiment of this application is shown.

[0065] like Figure 3 As shown, the heat pump unit control device 300 may include: a memory 301 storing a computer program; and a processor 302 reading the computer program stored in the memory to execute the heat pump unit control method described in any of the preceding claims of this application.

[0066] Specifically, the processor 302 loads the executable files corresponding to the processes of one or more computer programs into the memory 301 according to the following instructions, and the processor 302 runs the computer programs stored in the memory 301 to realize the various functions described in the foregoing embodiments of this application. For example, the processor 301 can perform the following steps:

[0067] In response to a unit shutdown command for the heat pump unit, the fan is controlled to operate at a target fan frequency, and the compressor is controlled to operate at a target compressor frequency. If the fan continues to operate at the target fan frequency for a period of time greater than or equal to a predetermined time threshold, and the temperature of the fan drive plate is detected to be less than or equal to a first temperature threshold, the compressor is controlled to stop operating. If the compressor stops operating and the fan is detected to meet predetermined shutdown conditions, the fan is controlled to stop operating.

[0068] In some embodiments, controlling the fan to stop operating if the compressor stops running and the fan is detected to meet predetermined stop conditions may include: if the compressor stops running, detecting whether the temperature of the fan drive board of the fan rises to a second temperature threshold, the second temperature threshold being greater than the first temperature threshold; if the temperature of the fan drive board is detected to rise to the second temperature threshold, then controlling the fan to stop operating.

[0069] In some embodiments, controlling the fan to operate at a target fan frequency and controlling the compressor to operate at a target compressor frequency may include: controlling the fan to operate at a minimum fan frequency; and controlling the compressor to operate at a minimum compressor frequency, wherein the target fan frequency includes the minimum fan frequency and the target compressor frequency includes the minimum compressor frequency.

[0070] In some embodiments, controlling the fan to operate at a target fan frequency and controlling the compressor to operate at a target compressor frequency may include: determining a matching fan frequency and a matching compressor frequency that match the predetermined unit parameters based on the predetermined unit parameters of the heat pump unit; controlling the fan to operate at the matching fan frequency and controlling the compressor to operate at the matching compressor frequency.

[0071] In some embodiments, controlling the compressor to stop operating may include: if the target compressor frequency is equal to the compressor's minimum compressor frequency, then shutting down the compressor; if the target compressor frequency is not equal to the compressor's minimum compressor frequency, then controlling the compressor frequency to decrease to the minimum compressor frequency and shutting down the compressor.

[0072] In some embodiments, controlling the fan to stop operating if the compressor stops running and the fan is detected to meet predetermined stop conditions may include: controlling the fan to stop operating if it is detected that the fan continues to operate at the target fan frequency for more than a predetermined stop time after the compressor stops running.

[0073] In some embodiments, the method may further include: obtaining the first temperature threshold and the predetermined time threshold based on predetermined heat pump control configuration parameters; and querying the threshold matching the predetermined unit parameters corresponding to the heat pump unit to obtain the first temperature threshold and the predetermined time threshold.

[0074] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a computer program, or by a computer program controlling related hardware. The computer program can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0075] Therefore, embodiments of this application also provide a storage medium storing a computer program that can be loaded by a processor to execute the steps in any of the heat pump unit methods provided in embodiments of this application.

[0076] The storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0077] Since the computer program stored in the storage medium can execute the steps of any of the methods provided in the embodiments of this application, the beneficial effects that the methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0078] This application also provides a heat pump unit, which may include: the heat pump unit control device 300 as described above.

[0079] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0080] It should be understood that this application is not limited to the embodiments described above and shown in the accompanying drawings, but various modifications and changes can be made without departing from its scope.

Claims

1. A control method for a heat pump unit, characterized in that, The heat pump unit includes a fan and a compressor, and the heat pump unit control method includes: In response to a unit shutdown command for the heat pump unit, the fan is controlled to operate at a target fan frequency, and the compressor is controlled to operate at a target compressor frequency. If the fan continues to run for a period of time greater than or equal to a predetermined time threshold after being reduced to the target fan frequency, and the temperature of the fan drive board is detected to be less than or equal to a first temperature threshold, then the compressor is controlled to stop running. If the compressor stops running, detect whether the temperature of the fan drive board of the fan rises to a second temperature threshold, where the second temperature threshold is greater than the first temperature threshold; If the temperature of the fan drive board is detected to rise to the second temperature threshold, the fan is controlled to stop running.

2. The method according to claim 1, characterized in that, The control of the fan to operate at a target fan frequency and the control of the compressor to operate at a target compressor frequency include: Control the fan to operate at the lowest possible frequency; and... The compressor is controlled to operate at a minimum compressor frequency, where the target fan frequency includes the minimum fan frequency and the target compressor frequency includes the minimum compressor frequency.

3. The method according to claim 1, characterized in that, The control of the fan to operate at a target fan frequency and the control of the compressor to operate at a target compressor frequency include: Based on the predetermined unit parameters of the heat pump unit, determine the matching fan frequency and matching compressor frequency to match the predetermined unit parameters; The fan is controlled to operate at the frequency of the matching fan, and the compressor is controlled to operate at the frequency of the matching compressor.

4. The method according to claim 1, characterized in that, The control of stopping the compressor includes: If the target compressor frequency is equal to the lowest compressor frequency of the compressor, then the compressor is turned off; If the target compressor frequency is not equal to the minimum compressor frequency of the compressor, then control the compressor frequency to be reduced to the minimum compressor frequency and shut down the compressor.

5. The method according to claim 1, characterized in that, The step of controlling the fan to stop operating if the compressor stops running and the fan is detected to meet predetermined shutdown conditions includes: If it is detected that the fan continues to operate at the target fan frequency for more than the predetermined stop time after the compressor stops operating, the fan is controlled to stop operating.

6. The method according to any one of claims 1 to 5, characterized in that, The first temperature threshold and the predetermined time threshold are obtained in one of the following ways: The first temperature threshold and the predetermined time threshold are obtained based on the predetermined heat pump control configuration parameters. Based on the predetermined unit parameters corresponding to the heat pump unit, the threshold values ​​matching the predetermined unit parameters are queried to obtain the first temperature threshold and the predetermined time threshold.

7. A heat pump unit control device, characterized in that, include: Memory, which stores computer programs; The processor reads a computer program stored in the memory to execute the heat pump unit control method according to any one of claims 1 to 6.

8. A storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the heat pump unit control method according to any one of claims 1 to 6.

9. A heat pump unit, characterized in that, include: The heat pump unit control device as described in claim 7.

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