Compressor control method and device, air conditioning unit and storage medium

Abstract

The present disclosure provides a compressor control method and device, an air conditioning unit and a storage medium, and relates to the field of air conditioners. The method comprises the following steps: starting a compressor and controlling the compressor to increase frequency to a target frequency; in the case that the compressor increases frequency to the target frequency and the exhaust gas superheat degree of the compressor does not reach a target value, controlling the unit to stop; and after the unit stops for a predetermined time, controlling the compressor to start again. In the compressor starting stage, after the compressor increases frequency to the target frequency, if the exhaust gas superheat degree does not reach the target value, the unit is controlled to stop. Since the compressor has been preheated and started, when the compressor starts again, the compressor can quickly increase frequency to establish the exhaust gas superheat degree, thereby reducing the risk of oil shortage and improving the reliability of the unit operation.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning, and more particularly to a compressor control method, apparatus, air conditioning unit, and storage medium. Background Technology

[0002] When a multi-split air conditioner is left in a low-temperature environment for an extended period, the refrigerant in the system will remain in a liquid state within the long connecting pipes. Upon restarting, the liquid refrigerant is difficult to circulate or evaporate into a gaseous state at low temperatures. This results in insufficient refrigerant circulation, the compressor is prone to running with liquid, the discharge superheat is low, the compressor oil discharge is increased, and oil shortage problems are likely to occur.

[0003] To address the issue of starting up under low-temperature conditions, related technologies actively increase the compressor frequency. This high-frequency operation drives refrigerant circulation, increases exhaust superheat, and reduces oil discharge. However, if the compressor frequency increase rate is too rapid, exhaust superheat may not be established before oil shortage occurs. Summary of the Invention

[0004] One technical problem this disclosure aims to solve is to provide a compressor control method, device, air conditioning unit, and storage medium that can address the issues of insufficient superheat in compressor exhaust during the frequency ramp-up phase and easy oil shortage when starting the unit after it has been placed at low temperatures and liquid accumulation.

[0005] According to one aspect of this disclosure, a compressor control method is proposed, comprising: starting the compressor and controlling the compressor to increase its frequency to a target frequency; controlling the unit to stop when the compressor has increased its frequency to the target frequency and the superheat of the compressor's exhaust has not reached a target value; and controlling the compressor to restart after a predetermined shutdown time.

[0006] In some embodiments, controlling the compressor to increase its frequency to a target frequency includes: determining the compressor's frequency increase control method based on the ambient temperature, the compressor's exhaust superheat, the unit's condensing pressure, and the evaporating pressure; and controlling the compressor to increase its frequency to the target frequency based on the compressor's frequency increase control method.

[0007] In some embodiments, determining the frequency ramp control mode of the compressor includes: when the ambient temperature is less than a temperature threshold, determining the frequency ramp control mode of the compressor as a first frequency ramp mode; and when the ambient temperature is greater than or equal to the temperature threshold, determining the frequency ramp control mode of the compressor as a second frequency ramp mode based on the exhaust superheat, condensing pressure and evaporating pressure, wherein the frequency ramp rate in the second frequency ramp mode is greater than the frequency ramp rate in the first frequency ramp mode.

[0008] In some embodiments, the upsampling period in the second upsampling method is shorter than the upsampling period in the first upsampling method, and the upsampling amplitude in the second upsampling method is greater than the upsampling amplitude in the first upsampling method.

[0009] In some embodiments, determining the compressor's frequency ramp control mode as a second frequency ramp mode based on the exhaust superheat, condensing pressure, and evaporating pressure includes: when the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold, the compressor's frequency ramp rate is a first speed; and when at least one of the exhaust superheat is less than a superheat threshold, the condensing pressure is greater than a condensing pressure threshold, and the evaporating pressure is less than an evaporating pressure threshold, the compressor's frequency ramp rate is a second speed, wherein the first speed is greater than the second speed.

[0010] In some embodiments, determining the compressor's frequency increase control mode as a second frequency increase mode based on the exhaust superheat, condensing pressure, and evaporating pressure further includes: when the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold, the compressor's frequency increase cycle is a first cycle and the compressor's frequency increase amplitude is a first amplitude; and when at least one of the exhaust superheat is less than a superheat threshold, the condensing pressure is greater than a condensing pressure threshold, and the evaporating pressure is less than an evaporating pressure threshold, the compressor's frequency increase cycle is a second cycle and the compressor's frequency increase amplitude is a second amplitude, wherein the first cycle is less than the second cycle, and the first amplitude is greater than the second amplitude.

[0011] In some embodiments, the compressor is controlled to run continuously when the compressor frequency is increased to the target frequency and the compressor exhaust superheat reaches the target value.

[0012] In some embodiments, if the compressor has been started once before a predetermined time, the compressor is controlled to continue running after being started again.

[0013] According to another aspect of this disclosure, a compressor control device is also proposed, comprising: a first control module configured to start the compressor and control the compressor to increase its frequency to a target frequency; a second control module configured to control the unit to stop when the compressor increases its frequency to the target frequency and the superheat of the compressor's exhaust does not reach a target value; and a third control module configured to control the compressor to restart after a predetermined shutdown time.

[0014] In some embodiments, the first control module is configured to determine the compressor frequency ramping control method based on the ambient temperature, the compressor's exhaust superheat, the unit's condensing pressure, and the evaporating pressure; and to control the compressor to ramp up to the target frequency based on the compressor frequency ramping control method.

[0015] In some embodiments, the first control module is configured to determine the compressor's frequency increase control mode as a first frequency increase mode when the ambient temperature is less than a temperature threshold; and to determine the compressor's frequency increase control mode as a second frequency increase mode based on the exhaust superheat, condensing pressure, and evaporating pressure when the ambient temperature is greater than or equal to the temperature threshold, wherein the frequency increase rate in the second frequency increase mode is greater than the frequency increase rate in the first frequency increase mode.

[0016] In some embodiments, the upsampling period in the second upsampling method is shorter than the upsampling period in the first upsampling method, and the upsampling amplitude in the second upsampling method is greater than the upsampling amplitude in the first upsampling method.

[0017] In some embodiments, the first control module is configured to control the compressor's frequency ramp-up speed to a first speed when the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold; and to control the compressor's frequency ramp-up speed to a second speed when at least one of the exhaust superheat is less than a superheat threshold, the condensing pressure is greater than a condensing pressure threshold, and the evaporating pressure is less than an evaporating pressure threshold, wherein the first speed is greater than the second speed.

[0018] In some embodiments, the first control module is configured to control the compressor's frequency increase cycle to be a first cycle and the compressor's frequency increase amplitude to be a first amplitude when the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold; and to control the compressor's frequency increase cycle to be a second cycle and the compressor's frequency increase amplitude to be a second amplitude when at least one of the exhaust superheat is less than a superheat threshold, the condensing pressure is greater than a condensing pressure threshold, and the evaporating pressure is less than an evaporating pressure threshold, wherein the first cycle is less than the second cycle and the first amplitude is greater than the second amplitude.

[0019] According to another aspect of this disclosure, a compressor control device is also proposed, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the compressor control method as described above based on instructions stored in the memory.

[0020] According to another aspect of this disclosure, an air conditioning unit is also provided, comprising: the compressor control device described above.

[0021] According to another aspect of this disclosure, a computer-readable storage medium is also provided, on which computer program instructions are stored, which, when executed by a processor, implement the compressor control method described above.

[0022] In this embodiment of the present disclosure, during the compressor start-up phase, after the compressor frequency is increased to the target frequency, if the exhaust superheat does not reach the target value, the unit is controlled to stop. Since the compressor has been preheated and started, when the compressor is started again, the compressor can quickly increase the frequency to establish exhaust superheat, reducing the risk of oil shortage and thus improving the reliability of the unit operation.

[0023] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0025] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0026] Figure 1 This is a schematic flowchart of some embodiments of the compressor control method disclosed herein;

[0027] Figure 2 The following are schematic flowcharts illustrating other embodiments of the compressor control method disclosed herein;

[0028] Figure 3 These are schematic diagrams illustrating the structure of some embodiments of the compressor control device disclosed herein; and

[0029] Figure 4 This is a schematic diagram of the structure of some other embodiments of the compressor control device disclosed herein. Detailed Implementation

[0030] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0031] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0037] Figure 1 This is a flowchart illustrating some embodiments of the compressor control method disclosed herein.

[0038] In step 110, the compressor is started and controlled to increase its frequency to the target frequency.

[0039] In some embodiments, upon receiving a power-on command, the compressor is controlled to start at the lowest operating frequency and its frequency is increased to the target frequency.

[0040] In step 120, if the compressor frequency is increased to the target frequency and the compressor exhaust superheat does not reach the target value, the unit is controlled to stop.

[0041] In some embodiments, after the compressor has been running for a period of time and its frequency has increased to the target frequency, if the compressor exhaust superheat still does not reach the set value, the unit will automatically shut down. The compressor preheating process is achieved through steps 110 and 120.

[0042] In step 130, after the unit has been shut down for a predetermined time, the compressor is restarted.

[0043] In some embodiments, after the compressor is started for the second time, the unit does not automatically shut down, and the compressor starts and runs normally.

[0044] In the above embodiment, during the compressor start-up phase, if the exhaust superheat does not reach the target value after the compressor frequency is increased to the target frequency, the unit is controlled to stop. Since the compressor has been preheated and started, when the compressor is started again, the compressor can quickly increase the frequency to establish exhaust superheat, reducing the risk of oil shortage and thus improving the reliability of unit operation.

[0045] In some embodiments of this disclosure, the compressor frequency ramping control method is determined based on the ambient temperature, the compressor exhaust superheat, the unit's condensing pressure, and the evaporating pressure; and the compressor frequency is ramped up to the target frequency based on the compressor frequency ramping control method.

[0046] For example, the compressor's frequency ramp-up rate, or frequency ramp-up cycle and frequency ramp-up amplitude can be determined based on parameters such as ambient temperature, exhaust superheat, condensing pressure, and evaporating pressure, thereby reducing the risk of oil shortage caused by excessively rapid frequency ramp-up.

[0047] In some embodiments, when the ambient temperature is less than a temperature threshold, the compressor frequency increase control mode is determined to be a first frequency increase mode; and when the ambient temperature is greater than or equal to the temperature threshold, the compressor frequency increase control mode is determined to be a second frequency increase mode based on the exhaust superheat, condensing pressure and evaporating pressure, wherein the frequency increase rate in the second frequency increase mode is greater than the frequency increase rate in the first frequency increase mode.

[0048] For example, if the current ambient temperature is low, the compressor will slowly and safely increase its frequency; if the current ambient temperature is high, the compressor's frequency increase rate will be increased in order to quickly produce a heating effect.

[0049] In some embodiments, increasing the compressor's boost frequency can be achieved by reducing the boost cycle and increasing the boost amplitude.

[0050] In some embodiments, the upsampling period in the second upsampling method is shorter than the upsampling period in the first upsampling method, and the upsampling amplitude in the second upsampling method is greater than the upsampling amplitude in the first upsampling method.

[0051] In this embodiment, the frequency increase period and amplitude are limited under different frequency increase methods. If the current ambient temperature is low, the time interval between each compressor frequency adjustment is increased, and the frequency increase amplitude is small each time, so that the compressor slowly increases its frequency, reducing the risk of compressor oil shortage. If the current ambient temperature is high, the time interval between each compressor frequency adjustment is decreased, and the frequency increase amplitude is large each time, so that the compressor quickly reaches the target frequency, the exhaust superheat increases rapidly, and the operating efficiency is improved.

[0052] In some embodiments, when the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold, the compressor's frequency ramp-up rate is a first rate; and when at least one of the exhaust superheat is less than a superheat threshold, the condensing pressure is greater than a condensing pressure threshold, and the evaporating pressure is less than an evaporating pressure threshold, the compressor's frequency ramp-up rate is a second rate, wherein the first rate is greater than the second rate.

[0053] For example, if the ambient temperature is high and the compressor discharge superheat is high, the condensing pressure is low, and the evaporating pressure is high, the compressor's frequency ramp-up speed should be increased. If the compressor discharge superheat is low, or the condensing pressure is high, or the evaporating pressure is low, the compressor's frequency ramp-up speed should be reduced. This ensures that the compressor can safely ramp up its frequency, while also quickly generating a heating effect and preventing the compressor from running out of oil.

[0054] In some embodiments, when the exhaust superheat is greater than or equal to the superheat threshold, the condensing pressure is less than or equal to the condensing pressure threshold, and the evaporating pressure is greater than or equal to the evaporating pressure threshold, the compressor's frequency increase cycle is a first cycle and the compressor's frequency increase amplitude is a first amplitude; and when at least one of the exhaust superheat is less than the superheat threshold, the condensing pressure is greater than the condensing pressure threshold, and the evaporating pressure is less than the evaporating pressure threshold, the compressor's frequency increase cycle is a second cycle and the compressor's frequency increase amplitude is a second amplitude, wherein the first cycle is less than the second cycle and the first amplitude is greater than the second amplitude.

[0055] For example, if the ambient temperature is high, and the compressor discharge superheat is high, the condensing pressure is low, and the evaporating pressure is high, then the compressor frequency ramp-up interval should be reduced, and the frequency ramp-up amplitude should be increased. This allows the compressor to choose a rapid frequency ramp-up when system parameters are favorable, quickly generating a heating effect. If the compressor discharge superheat is low, or the condensing pressure is high, or the evaporating pressure is low, then the compressor frequency ramp-up interval should be increased, and the frequency ramp-up amplitude should be reduced. This allows the compressor to choose a slow, safe frequency ramp-up when discharge superheat is insufficient, preventing the compressor from running out of oil.

[0056] In some embodiments, the compressor is controlled to continue running when its frequency is increased to the target frequency and the compressor's discharge superheat reaches the target value. In this embodiment, if the compressor's discharge superheat reaches the target value, there is no need to shut down the unit; the compressor can continue to operate normally without encountering an oil shortage problem.

[0057] In some embodiments, if the compressor has been started once before a predetermined time, the compressor is controlled to continue running after being started again.

[0058] In this embodiment, if the compressor has already been pre-started, after the second start, the compressor will operate under normal control and will no longer perform active shutdown, thus avoiding time-related shutdowns of the unit and affecting the user experience.

[0059] Figure 2 This is a flowchart illustrating some other embodiments of the compressor control method disclosed herein.

[0060] In step 210, start the compressor.

[0061] For example, the compressor starts at the lowest operating frequency.

[0062] In step 220, determine whether the current ambient temperature is lower than the temperature threshold. If yes, proceed to step 230; otherwise, proceed to step 240.

[0063] In step 230, the compressor is controlled to increase the frequency using the third cycle as the frequency increase cycle and the third amplitude as the frequency increase amplitude.

[0064] In step 240, it is determined whether the exhaust superheat is greater than or equal to the superheat threshold, whether the condensing pressure is less than or equal to the condensing pressure threshold, and whether the evaporating pressure is greater than or equal to the evaporating pressure threshold. If so, step 250 is executed; otherwise, step 260 is executed.

[0065] In step 250, the compressor is controlled to increase the frequency using the first cycle as the frequency increase cycle and the first amplitude as the frequency increase amplitude.

[0066] In step 260, the compressor is controlled to increase the frequency using the second cycle as the frequency increase cycle and the second amplitude as the frequency increase amplitude.

[0067] The first cycle is smaller than the second cycle, the second cycle is smaller than the third cycle, the first amplitude is larger than the second amplitude, and the second amplitude is larger than the third amplitude.

[0068] In step 270, when the compressor reaches the target frequency, it is determined whether the exhaust superheat has reached the target value. If it has not reached the target value, step 280 is executed; if it has reached the target value, step 2100 is executed.

[0069] After the compressor runs for a period of time, the frequency is increased to the target frequency.

[0070] In step 280, the control unit is shut down.

[0071] In step 290, the compressor is restarted.

[0072] For example, the compressor can be restarted three minutes after the unit stops.

[0073] In step 2100, the compressor is controlled to continue running.

[0074] In the above embodiments, by pre-starting the compressor to achieve low-temperature liquid accumulation preheating, the risk of oil shortage due to insufficient exhaust superheat during high-frequency compressor operation can be reduced. Furthermore, the specific frequency ramp-up rate and amplitude of the compressor are determined based on parameters such as ambient temperature, unit condensing and evaporating pressures, and compressor exhaust superheat. For example, when system parameters are favorable, a rapid frequency ramp-up is selected to quickly generate heating; when exhaust superheat is insufficient, a slow, safe frequency ramp-up is selected to prevent compressor oil shortage.

[0075] Figure 3 This is a schematic diagram of the structure of some embodiments of the compressor control device disclosed herein. The compressor control device includes a first control module 310, a second control module 320, and a third control module 330.

[0076] The first control module 310 is configured to start the compressor and control the compressor to increase its frequency to the target frequency.

[0077] In some embodiments, the first control module 310 is configured to determine the compressor frequency ramping control mode based on the ambient temperature, the compressor exhaust superheat, the unit's condensing pressure and evaporating pressure; and to control the compressor to ramp up to the target frequency based on the compressor frequency ramping control mode.

[0078] For example, when the ambient temperature is less than the temperature threshold, the compressor's frequency increase control mode is determined to be the first frequency increase mode; and when the ambient temperature is greater than or equal to the temperature threshold, the compressor's frequency increase control mode is determined to be the second frequency increase mode based on the exhaust superheat, condensing pressure, and evaporating pressure, wherein the frequency increase rate in the second frequency increase mode is greater than the frequency increase rate in the first frequency increase mode.

[0079] In some embodiments, the upsampling rate is related to the upsampling period and the upsampling amplitude. For example, the upsampling period in the second upsampling method is shorter than the upsampling period in the first upsampling method, and the upsampling amplitude in the second upsampling method is greater than the upsampling amplitude in the first upsampling method.

[0080] For example, when the exhaust superheat is greater than or equal to the superheat threshold, the condensing pressure is less than or equal to the condensing pressure threshold, and the evaporating pressure is greater than or equal to the evaporating pressure threshold, the compressor's frequency ramp-up speed is controlled to be a first speed; and when at least one of the exhaust superheat is less than the superheat threshold, the condensing pressure is greater than the condensing pressure threshold, and the evaporating pressure is less than the evaporating pressure threshold, the compressor's frequency ramp-up speed is controlled to be a second speed, wherein the first speed is greater than the second speed.

[0081] When the exhaust superheat is greater than or equal to the superheat threshold, the condensing pressure is less than or equal to the condensing pressure threshold, and the evaporating pressure is greater than or equal to the evaporating pressure threshold, the compressor frequency increase cycle is controlled to be a first cycle and the compressor frequency increase amplitude is a first amplitude; and when at least one of the exhaust superheat is less than the superheat threshold, the condensing pressure is greater than the condensing pressure threshold, and the evaporating pressure is less than the evaporating pressure threshold, the compressor frequency increase cycle is controlled to be a second cycle and the compressor frequency increase amplitude is a second amplitude, wherein the first cycle is less than the second cycle and the first amplitude is greater than the second amplitude.

[0082] The second control module 320 is configured to control the unit to shut down when the compressor frequency is increased to the target frequency and the compressor exhaust superheat does not reach the target value.

[0083] In some embodiments, the compressor is controlled to run continuously when the compressor frequency is increased to the target frequency and the compressor exhaust superheat reaches the target value.

[0084] The third control module 330 is configured to control the compressor to restart after a predetermined shutdown time.

[0085] In some embodiments, if the compressor has already started once before the predetermined time, after restarting the compressor, the compressor is controlled to continue running. That is, the unit is no longer actively shut down.

[0086] In the above embodiments, when starting under low temperature conditions, if the exhaust superheat still does not reach the set value after the compressor has been running for a period of time and increased to the target frequency, the unit will automatically stop and control the compressor to pre-start so that the exhaust superheat can be quickly established during the second start-up. This can solve the problem of insufficient exhaust superheat and easy oil shortage of the compressor during the frequency increase stage when starting after liquid accumulation in a multi-split unit at low temperature.

[0087] Figure 4 The diagram below illustrates the structure of some other embodiments of the compressor control device disclosed herein. The compressor control device 400 includes a memory 410 and a processor 420. The memory 410 may be a disk, flash memory, or any other non-volatile storage medium. The memory 410 is used to store instructions from the embodiments described above. The processor 420 is coupled to the memory 410 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 420 is used to execute the instructions stored in the memory.

[0088] In some embodiments, the processor 420 is coupled to the memory 410 via a BUS bus 430. The compressor control device 400 can also be connected to an external storage device 450 via a storage interface 440 to access external data, and can also be connected to a network or another computer system (not shown) via a network interface 460, which will not be described in detail here.

[0089] In this embodiment, storing data instructions in a memory and then processing those instructions with a processor can reduce the risk of oil shortage and improve system reliability.

[0090] In some embodiments of this disclosure, an air conditioning system is also protected, which includes the compressor control device described in the above embodiments. This air conditioning system is, for example, a multi-split system. This air conditioning system can reduce the risk of oil shortage caused by the compressor running too fast.

[0091] In other embodiments, a computer-readable storage medium stores computer program instructions that, when executed by a processor, implement the steps of the methods described above. Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0092] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0093] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0094] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0095] This concludes the detailed description of the present disclosure. To avoid obscuring the concept of the disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0096] The methods and apparatus of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0097] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A compressor control method, comprising: When the compressor is started, if the ambient temperature is below a temperature threshold, the compressor's frequency increase control mode is determined to be a first frequency increase mode. If the ambient temperature is greater than or equal to the temperature threshold, the compressor's frequency increase control mode is determined to be a second frequency increase mode based on the exhaust superheat, condensing pressure, and evaporating pressure. The frequency increase rate in the second frequency increase mode is greater than the frequency increase rate in the first frequency increase mode. Specifically, if the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold, the compressor's frequency increase rate is a first rate. If at least one of the following conditions is met: exhaust superheat is less than the superheat threshold, the condensing pressure is greater than the condensing pressure threshold, and the evaporating pressure is less than the evaporating pressure threshold, the compressor's frequency increase rate is a second rate, where the first rate is greater than the second rate. According to the compressor's frequency increase control method, the compressor is controlled to increase its frequency to the target frequency; If the compressor frequency is increased to the target frequency, but the compressor's exhaust superheat does not reach the target value, the unit is controlled to shut down; and After the unit has been shut down for a predetermined period of time, the compressor is controlled to restart.

2. The compressor control method according to claim 1, wherein, The upsampling period in the second upsampling method is shorter than the upsampling period in the first upsampling method, and the upsampling amplitude in the second upsampling method is greater than the upsampling amplitude in the first upsampling method.

3. The compressor control method according to claim 1, wherein, Determining the compressor's frequency increase control mode as the second frequency increase mode based on the exhaust superheat, the condensing pressure, and the evaporating pressure further includes: When the exhaust superheat is greater than or equal to the superheat threshold, the condensing pressure is less than or equal to the condensing pressure threshold, and the evaporating pressure is greater than or equal to the evaporating pressure threshold, the compressor's frequency ramp-up cycle is a first cycle, and the compressor's frequency ramp-up amplitude is a first amplitude; and When at least one of the following conditions is met: the exhaust superheat is less than the superheat threshold, the condensing pressure is greater than the condensing pressure threshold, and the evaporating pressure is less than the evaporating pressure threshold, the compressor's frequency increase cycle is a second cycle, and the compressor's frequency increase amplitude is a second amplitude, wherein the first cycle is less than the second cycle, and the first amplitude is greater than the second amplitude.

4. The compressor control method according to any one of claims 1 to 3, further comprising: When the compressor frequency is increased to the target frequency and the exhaust superheat of the compressor reaches the target value, the compressor is controlled to run continuously.

5. The compressor control method according to any one of claims 1 to 3, further comprising: If the compressor has already been started once before the predetermined time, the compressor will be controlled to continue running after being started again.

6. A compressor control device, comprising: A first control module is configured to start the compressor, and when the ambient temperature is less than a temperature threshold, determine the compressor's frequency increase control mode as a first frequency increase mode. When the ambient temperature is greater than or equal to the temperature threshold, determine the compressor's frequency increase control mode as a second frequency increase mode based on the exhaust superheat, condensing pressure, and evaporating pressure, wherein the frequency increase rate in the second frequency increase mode is greater than the frequency increase rate in the first frequency increase mode. Specifically, when the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold, the compressor's frequency increase rate is a first rate. When at least one of the following conditions is met: the exhaust superheat is less than the superheat threshold, the condensing pressure is greater than the condensing pressure threshold, and the evaporating pressure is less than the evaporating pressure threshold, the compressor's frequency increase rate is a second rate, wherein the first rate is greater than the second rate. Based on the compressor's frequency increase control mode, the module controls the compressor to increase its frequency to a target frequency. The second control module is configured to control the unit to shut down when the compressor frequency is increased to the target frequency and the compressor's exhaust superheat does not reach the target value; and The third control module is configured to control the compressor to restart after a predetermined downtime of the unit.

7. The compressor control device according to claim 6, wherein, The upsampling period in the second upsampling method is shorter than the upsampling period in the first upsampling method, and the upsampling amplitude in the second upsampling method is greater than the upsampling amplitude in the first upsampling method.

8. The compressor control device according to claim 6, wherein, The first control module is configured to control the compressor's frequency increase cycle to a first cycle and the compressor's frequency increase amplitude to a first amplitude when the exhaust superheat is greater than or equal to a superheat threshold, the condensing pressure is less than or equal to a condensing pressure threshold, and the evaporating pressure is greater than or equal to an evaporating pressure threshold. In the case where at least one of the following conditions is met: the exhaust superheat is less than the superheat threshold, the condensing pressure is greater than the condensing pressure threshold, and the evaporating pressure is less than the evaporating pressure threshold, the compressor frequency ramping period is controlled to be a second period and the compressor frequency ramping amplitude is controlled to be a second amplitude, wherein the first period is less than the second period and the first amplitude is greater than the second amplitude.

9. A compressor control device, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the compressor control method as described in any one of claims 1 to 5 based on instructions stored in the memory.

10. An air conditioning unit, comprising: The compressor control device according to any one of claims 6 to 9.

11. A computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the compressor control method according to any one of claims 1 to 5.

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