Air conditioning unit control method, device, electronic equipment and storage medium

Abstract

The present invention provides an air conditioning unit control method, device, electronic device, and storage medium. The method includes: obtaining the current outdoor temperature and the three-phase current value of the compressor in the air conditioning unit; when it is detected that the current outdoor temperature is greater than a preset high temperature threshold, based on the current outdoor temperature and the three-phase current value of the compressor, controlling the state of the bypass valve in the air conditioning unit according to a high temperature regulation strategy; when it is detected that the current outdoor temperature is less than a preset low temperature threshold, based on the current outdoor temperature and the three-phase current value of the compressor, controlling the state of the bypass valve in the air conditioning unit according to a low temperature regulation strategy. The present invention can improve the high and low temperature resistance of the air conditioning unit during operation, reduce the probability of high pressure / low pressure alarms in the air conditioning unit, and facilitate maintaining the long-term stable operation of the air conditioning unit in high and low temperature environments.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicle control, and in particular to an air-conditioning unit control method, device, electronic equipment and storage medium. Background Art

[0002] Rail vehicle air-conditioning units are equipped with two refrigeration systems. In order to improve the high or low temperature resistance of the air-conditioning units, a set of high and low pressure switches will be installed in each refrigeration system to protect the compressor. At the same time, an electromagnetic bypass valve will be installed in the refrigeration system to accurately control the temperature.

[0003] During rail vehicle operation, the system pressure of the air conditioning unit is affected by fluctuations in solar radiation intensity, mixed air temperature, and condensing air volume, occasionally leading to cooling failures and triggering of protection mechanisms. Currently, the main protection mechanisms in air conditioning units include load protection, overload / overcurrent protection, and internal protection.

[0004] However, due to the imperfect control logic of the current air-conditioning unit protection mechanism, the air-conditioning unit frequently issues high-voltage / low-voltage protection and fault alarms in the summer. At this time, manual reset operations are often required on the air-conditioning unit. This is not only not conducive to the long-term stable operation of the air-conditioning unit in high or low temperature environments, but also increases the workload of the staff. Summary of the Invention

[0005] Embodiments of the present invention provide an air conditioning unit control method, device, electronic device, and storage medium to solve the problem of poor high and low temperature resistance of the air conditioning unit.

[0006] In a first aspect, an embodiment of the present invention provides an air conditioning unit control method, comprising:

[0007] Get the current outdoor temperature and the three-phase current value of the compressor in the air conditioning unit;

[0008] When it is detected that the current outdoor temperature is greater than the preset high temperature threshold, the state of the bypass valve in the air conditioning unit is controlled according to the high temperature regulation strategy based on the current outdoor temperature and the three-phase current value of the compressor;

[0009] When it is detected that the current outdoor temperature is lower than the preset low temperature threshold, the state of the bypass valve in the air conditioning unit is controlled according to the low temperature adjustment strategy based on the current outdoor temperature and the three-phase current value of the compressor.

[0010] In one possible implementation, controlling the state of a bypass valve in an air conditioning unit according to a high temperature regulation strategy includes:

[0011] When any one of the three-phase current values ​​of the compressor is greater than or equal to a first current threshold, and any one of the three-phase current values ​​continues to be greater than or equal to the first current threshold for a first preset time period, controlling the bypass valve in the air-conditioning unit to close;

[0012] Alternatively, when the current outdoor temperature is greater than or equal to the first preset temperature, the bypass valve in the air-conditioning unit is controlled to close.

[0013] In one possible implementation, controlling the state of a bypass valve in an air-conditioning unit according to a low-temperature regulation strategy includes:

[0014] When any one of the three-phase current values ​​of the compressor is less than or equal to the second current threshold, and any one of the three-phase current values ​​continues to be less than or equal to the second current threshold for a first preset time period, controlling the bypass valve in the air-conditioning unit to close;

[0015] Alternatively, when the current outdoor temperature is less than or equal to a second preset temperature, the bypass valve in the air-conditioning unit is controlled to close;

[0016] The second preset temperature is lower than the first preset temperature, and the second current threshold is lower than the first current threshold.

[0017] In a possible implementation, after controlling the bypass valve in the air conditioning unit to close, the method further includes:

[0018] When the second preset time has passed and the current outdoor temperature is between the third preset temperature and the fourth preset temperature, controlling the bypass valve in the air-conditioning unit to be disconnected;

[0019] The second preset temperature is lower than the third preset temperature, the third preset temperature is lower than the fourth preset temperature, and the fourth preset temperature is lower than the first preset temperature.

[0020] In a possible implementation, the preset high temperature threshold is between the fourth preset temperature and the first preset temperature, and the preset low temperature threshold is between the second preset temperature and the third preset temperature.

[0021] In a possible implementation, the method further includes:

[0022] Obtain the status of the pressure switch in the air conditioning unit and the number of compressor failures in the air conditioning unit;

[0023] After the pressure switch is disconnected, the compressor in the air-conditioning unit is controlled to stop and the compressor shutdown time is recorded, and the number of fault occurrences is increased by one;

[0024] When the pressure switch is not closed and the compressor shutdown time is less than the preset shutdown time threshold, the circuit controlling the air-conditioning unit is locked and a fault alarm is triggered; or, when the number of faults occurs is greater than the preset redundancy number, the circuit controlling the air-conditioning unit is locked and a fault alarm is triggered.

[0025] In one possible implementation, after controlling the compressor in the air-conditioning unit to stop and recording the stop duration, the method further includes:

[0026] When the pressure switch is closed and the shutdown time is less than the preset shutdown time threshold, the bypass valve in the air conditioning unit is controlled to close;

[0027] After the third preset time period has elapsed, the state of the bypass valve in the air-conditioning unit is controlled according to the high temperature regulation strategy or the low temperature regulation strategy.

[0028] In a second aspect, an embodiment of the present invention provides an air conditioning unit control device, comprising:

[0029] The acquisition module is used to obtain the current outdoor temperature and the three-phase current value of the compressor in the air-conditioning unit;

[0030] A high temperature regulation module is configured to control the state of the bypass valve in the air conditioning unit according to a high temperature regulation strategy based on the current outdoor temperature and the three-phase current value of the compressor when it is detected that the current outdoor temperature is greater than a preset high temperature threshold;

[0031] The low temperature adjustment module is used to control the state of the bypass valve in the air-conditioning unit according to the low temperature adjustment strategy based on the current outdoor temperature and the three-phase current value of the compressor when it is detected that the current outdoor temperature is lower than the preset low temperature threshold.

[0032] In a third aspect, an embodiment of the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the air-conditioning unit control method as described in the first aspect or any possible implementation of the first aspect are implemented.

[0033] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the air-conditioning unit control method described in the first aspect or any possible implementation method of the first aspect.

[0034] Embodiments of the present invention provide an air conditioning unit control method, device, electronic device, and storage medium. These methods obtain the current outdoor temperature and the three-phase current value of the compressor in the air conditioning unit, determine whether the air conditioning unit's operating environment is high or low temperature, and then control the state of the air conditioning unit's bypass valve according to the corresponding high-temperature or low-temperature regulation strategy. The control method provided by embodiments of the present invention incorporates logical judgments between the current outdoor temperature, the three-phase current value of the compressor, and the bypass valve. This improves the air conditioning unit's ability to withstand high and low temperatures during operation, reduces the probability of high-pressure / low-pressure alarms in the air conditioning unit, and facilitates the long-term stable operation of the air conditioning unit in high and low temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is a flow chart of an implementation method of an air-conditioning unit control method provided by an embodiment of the present invention;

[0037] Figure 2 This is a flowchart of a fault diagnosis method provided by an embodiment of the present invention;

[0038] Figure 3 This is a schematic structural diagram of an air-conditioning unit control device provided by an embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0041] During the operation of rail vehicles, the system pressure of the air-conditioning unit is affected by the intensity of solar radiation, fluctuations in mixed air temperature and fluctuations in condensing air volume, and refrigeration failures and triggering of protection mechanisms may occasionally occur.

[0042] Currently, load protection for air conditioning units typically involves installing a thermal relay in the unit's main power supply circuit to protect the ventilator and condenser fan, while also providing a motor short-circuit protector for the compressor. Furthermore, the compressor's cooling current is set, typically within an adjustable range of 4-20A.

[0043] Secondly, an overload / overcurrent protection mechanism is set up for the air conditioning unit. When the air conditioning unit is operating, the compressor current is collected in real time. If the real-time compressor current exceeds 1.5 times the compressor cooling current setting value and lasts for 1 minute, the compressor is determined to have an overload fault. If the real-time compressor current exceeds 2 times the compressor cooling current setting value and lasts for 2 seconds, the compressor is determined to have an overcurrent fault and a cooling fault alarm is issued.

[0044] In addition, an internal protection mechanism for the air-conditioning unit is also set up. When the high / low pressure switch of the air-conditioning unit's refrigeration system is disconnected once, the internal protection of the air-conditioning unit will be immediately reported and the circuit will be locked, and a refrigeration fault alarm will be reported at the same time.

[0045] However, since the current air-conditioning unit control technology cannot accurately control the working status of the bypass solenoid valve and pressure switch, the air-conditioning unit frequently reports high-pressure / low-pressure protection in the summer, which requires vehicle crew members to repeatedly reset the air-conditioning unit and restart the air-conditioning unit, increasing the workload of the vehicle crew members.

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below with reference to the accompanying drawings.

[0047] Figure 1 The following is a flowchart of an implementation method of an air-conditioning unit control method provided by an embodiment of the present invention.

[0048] Step 101: Obtain the current outdoor temperature and the three-phase current value of the compressor in the air-conditioning unit.

[0049] In some embodiments, a temperature sensor can be provided to obtain the current outdoor temperature in real time. When the air conditioning unit's refrigeration system is operating normally and the bypass valve is in normal working condition, the compressor's three-phase current value is also stable. At this time, the compressor's three-phase current value can be collected in real time using a current transmitter.

[0050] In some embodiments, if it is detected that the current outdoor temperature is greater than a preset high temperature threshold, step 102 is executed; if it is detected that the current outdoor temperature is less than a preset low temperature threshold, step 103 is executed.

[0051] Step 102 : When it is detected that the current outdoor temperature is greater than a preset high temperature threshold, the state of the bypass valve in the air conditioning unit is controlled according to a high temperature regulation strategy based on the current outdoor temperature and the three-phase current value of the compressor.

[0052] In some embodiments, the specific processing of step 102 may be as follows:

[0053] Specifically, when any one of the three-phase current values ​​of the compressor is greater than or equal to the first current threshold, and any one of the three-phase current values ​​continues to be greater than or equal to the first current threshold for a first preset time, the bypass valve in the air-conditioning unit is controlled to close. The first preset time is generally 30 seconds, but it can also be adjusted according to the configuration parameters and operating characteristics of the air-conditioning unit's refrigeration system. Properly delaying the first preset time can prevent performance damage caused by frequent bypass valve operation. In addition, the first current threshold can also be set according to the model of the air-conditioning unit and the performance parameters of the compressor, but it must correspond to the high-pressure threshold when the air-conditioning unit's refrigeration system is operating.

[0054] Alternatively, when it is detected that the current outdoor temperature is greater than or equal to a first preset temperature, the bypass valve in the air conditioning unit is controlled to close. The first preset temperature may be set to 43°C.

[0055] In some embodiments, the first current thresholds corresponding to different models of air conditioning units are shown in Table 1:

[0056] Table 1 The first current threshold corresponding to different types of units

[0057] Unit model First current threshold (A) KLD-53 / 12DG-E 20 KLD-45 / 09DG-E 15.5 KLD-35 / 09DG-E 13 KLD-29 / 09D-E 10

[0058] Step 103 : When it is detected that the current outdoor temperature is lower than the preset low temperature threshold, the state of the bypass valve in the air conditioning unit is controlled according to the low temperature regulation strategy based on the current outdoor temperature and the three-phase current value of the compressor.

[0059] In some embodiments, the specific processing of step 103 may be as follows:

[0060] Specifically, when any one of the three-phase current values ​​of the compressor is less than or equal to a second current threshold, and any one of the three-phase current values ​​remains less than or equal to the second current threshold for a first predetermined period of time, the bypass valve in the air conditioning unit is controlled to close. The second current threshold can be set based on the model of the air conditioning unit and the performance parameters of the compressor, but the second current threshold must be greater than or equal to 2A and slightly lower than the low-temperature operating current of the air conditioning unit's refrigeration system.

[0061] Alternatively, when it is detected that the current outdoor temperature is less than or equal to a second preset temperature, the bypass valve in the air conditioning unit is controlled to close, wherein the second preset temperature can be set to 19°C.

[0062] It should be noted that the setting value of the second preset temperature is smaller than the first preset temperature, and the setting value of the second current threshold is smaller than the first current threshold.

[0063] In some embodiments, the second current thresholds corresponding to different models of air conditioning units are shown in Table 2:

[0064] Table 2 Second current threshold corresponding to different types of units

[0065] Unit model Second current threshold (A) KLD-53 / 12DG-E 12 KLD-45 / 09DG-E 9.5 KLD-35 / 09DG-E 8.5 KLD-29 / 09D-E 6.5

[0066] In some embodiments, after the bypass valve in the air conditioning unit is closed, the bypass valve in the air conditioning unit is controlled to open if a second preset time has passed and the current outdoor temperature is between a third preset temperature and a fourth preset temperature. The second preset time is typically 3 minutes. After this time, if the air conditioning unit is no longer in high or low temperature conditions, the bypass valve is controlled to open. The third preset temperature can be set to 21°C, and the fourth preset temperature can be set to 40°C.

[0067] It should be noted that the setting value of the second preset temperature is lower than the third preset temperature, the setting value of the third preset temperature is lower than the fourth preset temperature, and the setting value of the fourth preset temperature is lower than the first preset temperature.

[0068] In some embodiments, the preset high temperature threshold is between the fourth preset temperature and the first preset temperature, and the preset low temperature threshold is between the second preset temperature and the third preset temperature.

[0069] In some embodiments, the air conditioning unit control method may further include the following steps:

[0070] Step 201: Acquire the status of the pressure switch in the air-conditioning unit and the number of failures of the compressor in the air-conditioning unit.

[0071] Step 202: After the pressure switch is disconnected, the compressor in the air-conditioning unit is controlled to stop and the compressor stop time is recorded, and the number of fault occurrences is increased by one.

[0072] Specifically, after detecting that the pressure switch is disconnected, the compressor can be controlled to stop for 2 minutes, and the number of times the fault occurs can be recorded.

[0073] Step 203: When the pressure switch is not closed and the compressor shutdown time is less than the preset shutdown time threshold, the circuit of the air-conditioning unit is controlled to lock and trigger a fault alarm; or, when the number of faults is greater than the preset redundant number, the circuit of the air-conditioning unit is controlled to lock and trigger a fault alarm.

[0074] Specifically, if the pressure switch does not close within 2 minutes of the compressor being shut down, the circuit controlling the air conditioning unit is locked and a fault alarm is triggered. Alternatively, if the fault occurs more than 5 times, the circuit controlling the air conditioning unit is locked and a fault alarm is triggered.

[0075] In some embodiments, when the pressure switch is closed and the shutdown time is less than a preset shutdown time threshold, the bypass valve in the air-conditioning unit is controlled to close. After a third preset time length, the state of the bypass valve in the air-conditioning unit is controlled according to the high temperature adjustment strategy or the low temperature adjustment strategy.

[0076] Specifically, if the pressure switch returns to the closed state within 2 minutes of the compressor shutdown, the bypass valve corresponding to the compressor will be opened synchronously for 15 minutes. After 15 minutes, the bypass valve in the air-conditioning unit will be controlled according to the high temperature adjustment strategy or the low temperature adjustment strategy based on the current outdoor temperature.

[0077] The control method provided by this embodiment of the present invention incorporates a logical evaluation of the current outdoor temperature, the compressor's three-phase current, and the bypass valve. This improves the air conditioning unit's ability to withstand both high and low temperatures, reduces the likelihood of high- and low-pressure alarms, and facilitates long-term stable operation in both high and low-temperature environments. Furthermore, by setting thresholds and fault alarm strategies, the air conditioning unit's refrigeration pressure is prevented from exceeding the piping capacity and the compressor's operating range, ensuring safe and reliable operation.

[0078] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0079] The following are device embodiments of the present invention. For details not fully described therein, reference may be made to the corresponding method embodiments described above.

[0080] Figure 3 The following is a schematic diagram showing the structure of an air conditioning unit control device provided by an embodiment of the present invention. For ease of explanation, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:

[0081] like Figure 3 As shown, the air conditioning unit control device includes: a collection module 301, a high temperature adjustment module 302 and a low temperature adjustment module 303.

[0082] The acquisition module 301 is used to obtain the current outdoor temperature and the three-phase current value of the compressor in the air-conditioning unit;

[0083] A high temperature adjustment module 302 is configured to control the state of the bypass valve in the air conditioning unit according to a high temperature adjustment strategy based on the current outdoor temperature and the three-phase current value of the compressor when it is detected that the current outdoor temperature is greater than a preset high temperature threshold;

[0084] The low temperature adjustment module 303 is used to control the state of the bypass valve in the air conditioning unit according to the low temperature adjustment strategy based on the current outdoor temperature and the three-phase current value of the compressor when it is detected that the current outdoor temperature is lower than the preset low temperature threshold.

[0085] In some embodiments, the high temperature regulation module 302 may also be used to:

[0086] When any one of the three-phase current values ​​of the compressor is greater than or equal to a first current threshold, and any one of the three-phase current values ​​continues to be greater than or equal to the first current threshold for a first preset period of time, the bypass valve in the air-conditioning unit is controlled to close; or, when the current outdoor temperature is greater than or equal to a first preset temperature, the bypass valve in the air-conditioning unit is controlled to close.

[0087] In some embodiments, the low temperature adjustment module 303 may also be used to:

[0088] When any one of the three-phase current values ​​of the compressor is less than or equal to the second current threshold, and any one of the three-phase current values ​​continues to be less than or equal to the second current threshold for a first preset period of time, the bypass valve in the air-conditioning unit is controlled to close; or, when the current outdoor temperature is less than or equal to the second preset temperature, the bypass valve in the air-conditioning unit is controlled to close; wherein the second preset temperature is lower than the first preset temperature, and the second current threshold is lower than the first current threshold.

[0089] The embodiment of the present invention provides an air-conditioning unit control device, which controls the bypass valve of the air-conditioning unit by judging the logic between the current outdoor temperature, the three-phase current value of the compressor and the bypass valve, thereby improving the high and low temperature resistance of the air-conditioning unit during operation, reducing the probability of high-pressure / low-pressure alarms in the air-conditioning unit, and facilitating the long-term stable operation of the air-conditioning unit in high and low temperature environments.

[0090] Figure 4 Schematic diagram of an electronic device provided by an embodiment of the present invention. Figure 4 As shown, the electronic device 400 of this embodiment includes: a processor 401, a memory 402, and a computer program 403 stored in the memory 402 and executable on the processor 401. When the processor 401 executes the computer program 403, the steps in the above-mentioned embodiments of the air conditioning unit control method are implemented, for example Figure 1 Alternatively, when the processor 401 executes the computer program 403, the functions of the modules / units in the above-mentioned device embodiments are realized, for example Figure 3 Functions of modules / units 301 to 303 are shown.

[0091] Exemplarily, the computer program 403 may be divided into one or more modules / units, which are stored in the memory 402 and executed by the processor 401 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments that can implement specific functions, and the instruction segments are used to describe the execution process of the computer program 403 in the electronic device. For example, the computer program 403 may be divided into Figure 3 Modules / units 301 to 303 are shown.

[0092] The electronic device 400 may include, but is not limited to, a processor 401 and a memory 402. Those skilled in the art will understand that Figure 4 It is only an example of the electronic device 400 and does not constitute a limitation of the electronic device 400. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0093] The processor 401 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0094] The memory 402 may be an internal storage unit of the electronic device 400, such as a hard disk or memory of the electronic device 400. The memory 402 may also be an external storage device of the electronic device 400, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 400. Furthermore, the memory 402 may include both an internal storage unit of the electronic device 400 and an external storage device. The memory 402 is used to store the computer program and other programs and data required by the electronic device. The memory 402 may also be used to temporarily store data that has been output or is about to be output.

[0095] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0096] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0097] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0098] In the embodiments provided by the present invention, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0099] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0100] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0101] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of the above-mentioned various air-conditioning unit control method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0102] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A method for controlling an air conditioning unit, characterized in that: include: Get the current outdoor temperature and the three-phase current value of the compressor in the air conditioning unit; When it is detected that the current outdoor temperature is greater than a preset high temperature threshold, the state of the bypass valve in the air conditioning unit is controlled according to a high temperature regulation strategy based on the current outdoor temperature and the three-phase current value of the compressor; When it is detected that the current outdoor temperature is lower than a preset low temperature threshold, the state of the bypass valve in the air conditioning unit is controlled according to a low temperature regulation strategy based on the current outdoor temperature and the three-phase current value of the compressor; The controlling the state of the bypass valve in the air-conditioning unit according to the high temperature regulation strategy includes: When any one of the three-phase current values ​​of the compressor is continuously greater than or equal to a first current threshold value for a first preset time period, controlling the bypass valve in the air-conditioning unit to close; Alternatively, when the current outdoor temperature is greater than or equal to a first preset temperature, controlling the bypass valve in the air-conditioning unit to close; The controlling the state of the bypass valve in the air-conditioning unit according to the low-temperature regulation strategy includes: When any one of the three-phase current values ​​of the compressor is continuously less than or equal to the second current threshold for a first preset period of time, controlling the bypass valve in the air-conditioning unit to close; Alternatively, when the current outdoor temperature is less than or equal to a second preset temperature, controlling the bypass valve in the air-conditioning unit to close; Wherein, the second preset temperature is lower than the first preset temperature, and the second current threshold is lower than the first current threshold; After controlling the bypass valve in the air conditioning unit to close, the method further includes: When a second preset time has passed and the current outdoor temperature is between a third preset temperature and a fourth preset temperature, controlling the bypass valve in the air conditioning unit to be disconnected; Wherein, the second preset temperature is lower than the third preset temperature, the third preset temperature is lower than the fourth preset temperature, and the fourth preset temperature is lower than the first preset temperature; The preset high temperature threshold is between the fourth preset temperature and the first preset temperature, and the preset low temperature threshold is between the second preset temperature and the third preset temperature.

2. The air conditioning unit control method according to claim 1, characterized in that: The method further comprises: Acquiring the status of the pressure switch in the air-conditioning unit and the number of failures of the compressor in the air-conditioning unit; After the pressure switch is disconnected, the compressor in the air-conditioning unit is controlled to stop and the compressor stop time is recorded, and the number of fault occurrences is increased by one; When the pressure switch is not closed and the compressor shutdown time is less than the preset shutdown time threshold, the circuit controlling the air-conditioning unit is locked and a fault alarm is triggered; or, when the number of times the fault occurs is greater than the preset redundant number of times, the circuit controlling the air-conditioning unit is locked and a fault alarm is triggered.

3. The air conditioning unit control method according to claim 2, characterized in that: After controlling the compressor in the air-conditioning unit to stop and recording the compressor stop time, the method further includes: When the pressure switch is closed and the compressor shutdown time is less than a preset shutdown time threshold, controlling the bypass valve in the air-conditioning unit to close; After a third preset time period has elapsed, the state of the bypass valve in the air-conditioning unit is controlled according to the high temperature regulation strategy or the low temperature regulation strategy.

4. An air conditioning unit control device, characterized in that: include: The acquisition module is used to obtain the current outdoor temperature and the three-phase current value of the compressor in the air-conditioning unit; a high temperature regulating module, configured to control the state of the bypass valve in the air conditioning unit according to a high temperature regulating strategy based on the current outdoor temperature and the three-phase current value of the compressor when detecting that the current outdoor temperature is greater than a preset high temperature threshold; a low-temperature adjustment module, configured to control the state of the bypass valve in the air-conditioning unit according to a low-temperature adjustment strategy based on the current outdoor temperature and the three-phase current value of the compressor when it is detected that the current outdoor temperature is lower than a preset low-temperature threshold; The high temperature adjustment module is specifically used for: When any one of the three-phase current values ​​of the compressor is continuously greater than or equal to a first current threshold value for a first preset time period, controlling the bypass valve in the air-conditioning unit to close; Alternatively, when the current outdoor temperature is greater than or equal to a first preset temperature, controlling the bypass valve in the air-conditioning unit to close; The low temperature adjustment module is specifically used for: When any one of the three-phase current values ​​of the compressor is continuously less than or equal to the second current threshold for a first preset period of time, controlling the bypass valve in the air-conditioning unit to close; Alternatively, when the current outdoor temperature is less than or equal to a second preset temperature, controlling the bypass valve in the air-conditioning unit to close; Wherein, the second preset temperature is lower than the first preset temperature, and the second current threshold is lower than the first current threshold; After controlling the bypass valve in the air conditioning unit to close, the high temperature adjustment module and the low temperature adjustment module are further used to: When a second preset time has passed and the current outdoor temperature is between a third preset temperature and a fourth preset temperature, controlling the bypass valve in the air conditioning unit to be disconnected; Wherein, the second preset temperature is lower than the third preset temperature, the third preset temperature is lower than the fourth preset temperature, and the fourth preset temperature is lower than the first preset temperature; The preset high temperature threshold is between the fourth preset temperature and the first preset temperature, and the preset low temperature threshold is between the second preset temperature and the third preset temperature.

5. An electronic device comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and execute the computer program stored in the memory, wherein: When the processor executes the computer program, the steps of the air conditioning unit control method according to any one of claims 1 to 3 are implemented.

6. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the air conditioning unit control method according to any one of claims 1 to 3 are implemented.

Images