Low-voltage protection method for air conditioner, related device and storage medium

Abstract

The application discloses a low-pressure protection method of an air conditioner, related equipment and a storage medium, and the method comprises the following steps: determining whether the outdoor environment temperature currently met by the air conditioner meets a first preset condition, if yes, acquiring the suction pressure of a compressor in the air conditioner; when a second preset condition is met, performing low-pressure protection on the air conditioner; wherein the second preset condition at least comprises that the suction pressure is less than a preset pressure threshold. By using the application, the technical problems that the service life and reliability of the compressor are reduced when the existing technology does not have low-pressure protection during the starting process of the air conditioner can be solved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a low-pressure protection method, related equipment and storage medium for an air conditioner. Background Technology

[0002] Currently, air conditioner manufacturers generally do not perform system pressure checks during the start-up process, which prevents the system from implementing low-pressure protection, thus reducing the compressor's lifespan and reliability. Specifically, after installation, the pressure shut-off valve on the outdoor unit is usually closed, meaning it is not open.

[0003] In practical applications, when the air conditioner is turned on for cooling, the compressor also starts simultaneously. If there is no low-pressure protection during the system startup phase, the pressure shut-off valve will not open, causing the compressor to continuously operate under vacuum at the suction end. Due to the lack of refrigerant or lubricating oil flow inside the compressor, severe wear will occur on the back of the compressor's rotating disc and its supporting surface, leading to excessively high internal temperatures. This high temperature may melt components such as the resin seal ring at the center of the compressor's vortex, thus affecting the compressor's lifespan and reducing its reliability.

[0004] Therefore, there is an urgent need to propose a low-pressure protection scheme for air conditioners. Summary of the Invention

[0005] This invention provides a low-pressure protection method, related equipment, and storage medium for air conditioners, solving the technical problem of reduced compressor lifespan and reliability caused by the lack of low-pressure protection during air conditioner startup.

[0006] In a first aspect, embodiments of the present invention provide a low-pressure protection method for an air conditioner, the method comprising:

[0007] Determine whether the current outdoor ambient temperature of the air conditioner meets the first preset condition;

[0008] If so, then obtain the suction pressure of the compressor in the air conditioner;

[0009] When a second preset condition is met, the air conditioner is protected against low pressure; wherein the second preset condition includes at least the intake pressure being less than a preset pressure threshold.

[0010] In some implementations, determining whether the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition includes:

[0011] Determine whether the current outdoor ambient temperature of the air conditioner is greater than a first preset temperature;

[0012] If so, then it is determined that the current outdoor ambient temperature of the air conditioner meets the first preset condition.

[0013] In some implementations, determining whether the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition further includes:

[0014] When the outdoor ambient temperature is less than or equal to a first preset temperature, it is determined whether the outdoor ambient temperature is greater than a second preset temperature, wherein the first preset temperature is greater than the second preset temperature;

[0015] If so, determine whether the running time of the air conditioner has reached the first preset time.

[0016] If so, it is determined that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition; wherein, the first preset condition includes that the outdoor ambient temperature is less than or equal to the first preset temperature and greater than the second outdoor temperature, and that the running time reaches the first preset duration.

[0017] In some implementations, determining whether the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition further includes:

[0018] When the outdoor ambient temperature is less than or equal to the second preset temperature, it is determined whether the operating time of the air conditioner has reached the second preset time.

[0019] If so, it is determined that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition; wherein, the first preset condition includes the outdoor ambient temperature being less than or equal to the second preset temperature, and the running time reaching the second preset duration.

[0020] In some implementations, providing low-pressure protection to the air conditioner when a preset second condition is met includes:

[0021] When the inhalation pressure is less than the pressure threshold, the duration of the low pressure is recorded, wherein the duration of the low pressure is the duration corresponding to the inhalation pressure being less than the pressure threshold;

[0022] When the duration of low pressure exceeds a third preset duration, the air conditioner is protected against low pressure; wherein, the second preset condition further includes the duration of low pressure exceeding the third preset duration.

[0023] In some implementations, the method further includes:

[0024] The air conditioner shall maintain normal operation when the first preset condition and / or the second preset condition are not met.

[0025] In some implementations, the low-pressure protection of the air conditioner includes any one of the following:

[0026] The power to the air conditioner was cut off.

[0027] The compressor is shut down.

[0028] Open the pressure shut-off valve of the air conditioner.

[0029] Secondly, embodiments of the present invention provide a low-pressure protection device for an air conditioner, the device comprising a judgment module, an acquisition module, and a protection module, wherein:

[0030] The judgment module is used to determine whether the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition;

[0031] The acquisition module is used to acquire the suction pressure of the compressor in the air conditioner when the outdoor ambient temperature meets the first preset condition.

[0032] The protection module is used to provide low-pressure protection for the air conditioner when a second preset condition is met; wherein the second preset condition includes at least the suction pressure being less than a preset pressure threshold.

[0033] For any content not introduced or described in the embodiments of the present invention, please refer to the relevant descriptions in the foregoing method embodiments; they will not be repeated here.

[0034] Thirdly, embodiments of the present invention provide another low-pressure protection device for an air conditioner, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the low-pressure protection method for the air conditioner as described above.

[0035] Fourthly, embodiments of the present invention provide an air conditioner, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the low-pressure protection method of the air conditioner as described above.

[0036] Fifthly, embodiments of the present invention provide a home appliance, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the low-pressure protection method for an air conditioner as described above.

[0037] In a sixth aspect, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the low-pressure protection method for an air conditioner as described above.

[0038] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: The present invention determines whether the current outdoor ambient temperature of the air conditioner meets a first preset condition; if so, it obtains the suction pressure of the compressor in the air conditioner; when a second preset condition is met, it provides low-pressure protection for the air conditioner; wherein, the second preset condition includes at least the suction pressure being less than a preset pressure threshold. In the above solution, the present invention can provide low-pressure protection for the air conditioner when it determines that the suction pressure of the compressor in the air conditioner is less than the preset pressure threshold. This improves the convenience and practicality of low-pressure protection for the air conditioner, and prevents damage to the air conditioner (e.g., the compressor in the air conditioner) under low-pressure conditions, thereby reducing the service life and reliability of the air conditioner. This also helps to improve the service life and reliability of the air conditioner. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart illustrating a low-pressure protection method for an air conditioner provided in an embodiment of the present invention.

[0041] Figure 2 This is a flowchart illustrating another low-pressure protection method for an air conditioner provided in an embodiment of the present invention.

[0042] Figure 3 This is a flowchart illustrating another low-pressure protection method for an air conditioner provided in an embodiment of the present invention.

[0043] Figure 4 This is a schematic diagram of the structure of a low-pressure protection device for an air conditioner provided in an embodiment of the present invention.

[0044] Figure 5 This is a structural schematic diagram of an air conditioner provided in an embodiment of the present invention. Detailed Implementation

[0045] In view of the technical problems in existing technology, such as the lack of low-pressure protection when an air conditioner is turned on for cooling, leading to a reduction in the service life and reliability of the compressor, this invention provides a low-pressure protection method for air conditioners. The general idea is as follows: determine whether the current outdoor ambient temperature of the air conditioner meets a first preset condition; if so, obtain the suction pressure of the compressor in the air conditioner; when a second preset condition is met, perform low-pressure protection on the air conditioner; wherein, the second preset condition includes at least the suction pressure being less than a preset pressure threshold. This allows for simple and convenient low-pressure protection of the air conditioner based on the compressor's suction pressure, improving the convenience and practicality of low-pressure protection, and also increasing the service life and reliability of the air conditioner or its compressor. (Refrigeration)

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0047] Please see Figure 1 This is a flowchart illustrating a low-pressure protection method for an air conditioner provided in an embodiment of the present invention. Figure 1 The method shown can be applied to air conditioners or other household appliances with compressors. The following description uses an application to an air conditioner as an example, but this does not constitute a limitation. Figure 1 The method shown includes the following implementation steps:

[0048] S101. Determine whether the current outdoor ambient temperature of the air conditioner meets the first preset condition.

[0049] In a specific implementation, the present invention can determine whether the outdoor ambient temperature where the air conditioner is currently located is greater than a first preset temperature. When the outdoor ambient temperature is greater than the first preset temperature, the present invention can determine / confirm that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition, and continue to execute step S102.

[0050] Conversely, when the outdoor ambient temperature is less than or equal to the first preset temperature, the present invention can further determine whether the outdoor ambient temperature is greater than a second preset temperature, wherein the first preset temperature and the second preset temperature are both system-defined temperatures, and the first preset temperature is greater than the second preset temperature, for example, the first preset temperature can be 20℃, and the second preset temperature can be 3℃, etc. When the outdoor ambient temperature is greater than the second preset temperature, the present invention can obtain the current running time of the air conditioner and continue to determine whether the running time of the air conditioner has reached the first preset time. If the first preset time is reached, the present invention can determine that the current outdoor ambient temperature of the air conditioner meets the first preset condition and continue to execute step S102. Conversely, if the first preset time is not reached, the present invention can determine that the current outdoor ambient temperature of the air conditioner does not meet the first preset condition, and the present invention can continue to maintain the normal operation of the air conditioner without performing low-pressure protection on the air conditioner.

[0051] When the outdoor ambient temperature is less than or equal to the second preset temperature, the present invention can obtain the current operating time of the air conditioner and further determine whether the operating time of the air conditioner has reached the second preset duration. If the second preset duration is reached, the present invention can determine that the current outdoor ambient temperature of the air conditioner meets the first preset condition and continue to execute step S102. Conversely, if the second preset duration is not reached, the present invention can determine that the current outdoor ambient temperature of the air conditioner does not meet the first preset condition, and the present invention can continue to maintain the normal operation of the air conditioner and end the process. The first preset duration and the second preset duration involved in the present invention are both system-defined settings, and the second preset duration is longer than the first preset duration, for example, the first preset duration is 90 seconds (s), and the second preset duration is 150 seconds, etc.

[0052] In an optional embodiment, before step S101, the present invention may further determine whether the air conditioner is currently operating in a preset mode. If the air conditioner is operating in the preset mode, the present invention may continue to execute step S101; otherwise, the process may end.

[0053] In specific implementation, after the air conditioner is turned on, it can be determined whether the current operating mode of the air conditioner is a preset mode. If so, step S101 can continue; otherwise, the normal operation of the air conditioner (e.g., the compressor) can be maintained, and the process ends. The preset mode can be a system-defined operating mode, which may include, but is not limited to, the air conditioner's cooling mode, dehumidification mode, or other operating modes.

[0054] S102. Obtain the suction pressure of the compressor in the air conditioner.

[0055] When the present invention determines that the outdoor ambient temperature where the air conditioner is currently located meets a first preset condition, it can acquire the compressor's suction pressure in real time or periodically, for example, acquiring the compressor's suction pressure at different times. Specifically, the suction pressure refers to the pressure at the suction end of the compressor.

[0056] S103. When the second preset condition is met, the air conditioner is subjected to low-pressure protection; wherein, the second preset condition is a low-pressure condition set by the system, and in this example, the second preset condition at least includes the suction pressure being less than a preset pressure threshold. Optionally, the second preset condition may also include some other low-pressure limiting conditions according to the actual needs of the system, which will be described in detail below, and are not limited here.

[0057] In one specific embodiment, the present invention can directly provide low-pressure protection for the air conditioner based on the obtained suction pressure.

[0058] In specific implementation, after obtaining the suction pressure, the present invention can determine whether the suction pressure is less than a preset pressure threshold. When the suction pressure is less than the pressure threshold, the air conditioner can be protected against low pressure. Conversely, when the suction pressure is greater than or equal to the pressure threshold, the present invention can maintain the normal operation of the air conditioner without needing to protect it against low pressure. In this embodiment, the second preset condition includes the suction pressure being less than the pressure threshold.

[0059] The pressure threshold can specifically be the switching pressure value of the compressor under low-pressure conditions, which can be customized by the system according to actual conditions, such as 0.1 MPa, etc., and is not limited in this invention. The specific implementation of the low-pressure protection involved in this invention is not limited in this invention, and may include, for example, any of the following: this invention can disconnect the power to the air conditioner; open the pressure shut-off valve of the air conditioner to ensure that the air conditioner can operate normally; or directly shut down the compressor, such as by commanding the compressor to shut down, etc.

[0060] In another specific embodiment, when the present invention determines that the suction pressure is less than a preset pressure threshold, it can record the corresponding low-pressure duration, wherein the low-pressure duration specifically refers to the duration during which the compressor's suction pressure is less than the pressure threshold. Furthermore, the present invention provides low-pressure protection for the air conditioner based on the low-pressure duration. In this example, the second preset condition is related to the low-pressure duration, and specifically may include, for example, the low-pressure duration being greater than a preset duration.

[0061] In specific implementation, when the present invention determines that the intake pressure is less than the pressure threshold, it can record the duration of low pressure corresponding to the intake pressure being less than the pressure threshold. Then, it determines whether the duration of low pressure is greater than a preset duration, where the preset duration is a system-defined low-pressure protection duration threshold, such as 5 seconds, which is not limited in this invention. When the duration of low pressure is greater than the preset duration, the present invention can provide low-pressure protection for the air conditioner. The specific description of this low-pressure protection can be found in the previous embodiment and will not be repeated here. Conversely, when the duration of low pressure is less than or equal to the preset duration, the present invention can maintain the normal operation of the air conditioner without requiring low-pressure protection.

[0062] The following describes some alternative embodiments of the present invention.

[0063] In some optional embodiments, when the present invention detects that the air conditioner (specifically, relevant parameters involved in the air conditioner, such as outdoor ambient temperature, compressor suction pressure, or low-pressure duration) does not meet the first preset condition and / or the second preset condition, it can control the controller to continue operating in the mode indicated by the preset mode, synchronously maintaining the normal operation of the air conditioner without needing to perform low-pressure protection on the air conditioner. The first preset condition is a system-defined setting, which may include, but is not limited to, conditions such as the outdoor ambient temperature being less than or equal to the first preset temperature and greater than the second outdoor temperature, and the operating time reaching the first preset duration; or, conditions such as the outdoor ambient temperature being less than or equal to the second preset temperature, and the operating time reaching the second preset duration, etc., the present invention does not limit this. The second preset condition is a system-defined setting, which may include, but is not limited to, conditions such as the compressor suction pressure being less than the pressure threshold and the low-pressure duration being greater than the preset duration, etc.

[0064] In other words, when the present invention determines that the suction pressure of the compressor is less than or equal to the preset pressure threshold, the present invention can control the air conditioner to continue operating in the mode indicated by the preset mode, for example, to maintain the normal operation of the air conditioner simultaneously without needing to perform low-pressure protection on the air conditioner.

[0065] Alternatively, when the present invention determines that the outdoor ambient temperature is less than or equal to the first preset temperature and greater than the second preset temperature, and the operating time of the air conditioner has not reached the first preset duration, the present invention can also control the air conditioner to continue operating in the mode indicated by the preset mode, for example, to synchronously maintain the normal operation of the air conditioner without needing to perform low-pressure protection on the air conditioner.

[0066] Alternatively, when the present invention determines that the outdoor ambient temperature is less than or equal to the second preset temperature and the operating time of the air conditioner has not reached the second preset duration, the present invention can also control the air conditioner to continue operating in the mode indicated by the preset mode, for example, synchronously maintaining the normal operation of the air conditioner (such as the compressor) without needing to perform low-pressure protection on the air conditioner.

[0067] Alternatively, when the present invention determines that the duration of the low pressure (specifically, the duration of the low pressure corresponding to the intake pressure being less than the pressure threshold) is less than or equal to the preset duration, the present invention can also control the air conditioner to continue operating in the mode indicated by the preset mode, for example, to synchronously maintain the normal operation of the air conditioner without needing to perform low pressure protection on the air conditioner.

[0068] It should be noted that the various embodiments of the present invention described above can be implemented individually or in combination, and can be determined according to the actual needs of the system. The present invention does not impose any limitations.

[0069] To help better understand the embodiments of the present invention, please refer to the following: Figure 2 This invention specifically illustrates a flowchart of another low-pressure protection method for an air conditioner that may be involved in this invention. For example... Figure 2 The method shown includes the following implementation steps:

[0070] S201. The air conditioner is turned on and running.

[0071] S202. Determine whether the current operating mode of the air conditioner is cooling mode.

[0072] After the air conditioner is turned on, the present invention can obtain the current operating mode of the air conditioner and determine whether the current operating mode of the air conditioner is cooling mode. If so, the present invention can continue to execute step S203; otherwise, it continues to execute step S210.

[0073] S203. Obtain the outdoor ambient temperature.

[0074] S204. Determine whether the outdoor ambient temperature is greater than a preset temperature threshold.

[0075] When the present invention determines that the outdoor ambient temperature is greater than the temperature threshold, it may continue to execute step S205; otherwise, it may continue to execute step S210. The temperature threshold is a system-defined setting, for example, it may be the same as the first preset temperature described above.

[0076] S205. Obtain the suction pressure of the compressor in the air conditioner.

[0077] S206. Determine whether the inhalation pressure is less than a preset pressure threshold.

[0078] If the present invention determines that the inhalation pressure is less than the pressure threshold, it may continue to execute step S207; otherwise, it may continue to execute step S210.

[0079] S207. Record the duration of low pressure corresponding to the inhalation pressure being less than the pressure threshold.

[0080] S208. Determine whether the duration of the low pressure is greater than the preset duration.

[0081] If the present invention determines that the duration of the low pressure is longer than the preset duration, it may continue to execute step S209; otherwise, it may continue to execute step S210.

[0082] S209. Provide low-pressure protection for the air conditioner. Specifically, the present invention can disconnect the power to the entire air conditioner, and the compressor will also stop simultaneously.

[0083] S210. Maintain the normal operation of the air conditioner, for example, the air conditioner normally performs the corresponding cooling operation in the cooling mode, without the need for low-pressure protection of the air conditioner.

[0084] Please see below. Figure 3 This is a schematic flowchart of another low-pressure protection method for an air conditioner that may be involved in this invention. Figure 3 The method shown includes the following implementation steps:

[0085] S301. The air conditioner is turned on and running.

[0086] S302. Obtain the current outdoor ambient temperature of the air conditioner.

[0087] Optionally, before executing step S302, the present invention may also determine whether the air conditioner is currently operating in a preset mode. If so, step S302 may continue to be executed; otherwise, step S313 may continue to be executed.

[0088] S303. Determine whether the current outdoor ambient temperature of the air conditioner is greater than the first preset temperature.

[0089] If the outdoor ambient temperature is determined to be greater than the first preset temperature, the present invention may continue to execute step S308; otherwise, it may continue to execute step S304.

[0090] S304. Record the start-up time of the air conditioner, also known as the running time of the air conditioner.

[0091] S305. Determine whether the outdoor ambient temperature is greater than the second preset temperature.

[0092] If the present invention determines that the outdoor ambient temperature is greater than the second preset temperature, it may continue to execute step S306; otherwise, it may continue to execute step S307.

[0093] S306. Determine whether the running time of the air conditioner has reached the first preset time.

[0094] When the present invention determines that the running time of the air conditioner has reached the first preset time, it may continue to execute step S308; otherwise, it may continue to execute step S313.

[0095] S307. Determine whether the running time of the air conditioner has reached the second preset time.

[0096] When the present invention determines that the running time of the air conditioner has reached the second preset time, it may continue to execute step S308; otherwise, it may continue to execute step S313.

[0097] S308. Obtain the suction pressure of the compressor in the air conditioner.

[0098] S309. Determine whether the inhalation pressure is less than a preset pressure threshold.

[0099] If the present invention determines that the inhalation pressure is less than the pressure threshold, it may continue to execute step S310; otherwise, it may continue to execute step S313.

[0100] S310. Record the duration of low pressure corresponding to the inhalation pressure being less than the pressure threshold.

[0101] S311. Determine whether the duration of the low pressure is greater than the preset duration.

[0102] If the present invention determines that the duration of the low pressure is longer than the preset duration, it may continue to execute step S312; otherwise, it may continue to execute step S313.

[0103] S312. Provide low-pressure protection for the air conditioner. Specifically, the present invention can disconnect the power to the entire air conditioner, and the compressor will also stop simultaneously.

[0104] S313. Maintain the normal operation of the air conditioner without needing to perform low-pressure protection on the air conditioner.

[0105] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: The present invention obtains the suction pressure of the compressor in the air conditioner; when the suction pressure is less than a preset pressure threshold, the air conditioner is protected against low pressure. In the above solution, the present invention can protect the air conditioner against low pressure when it determines that the suction pressure of the compressor in the air conditioner is less than the preset pressure threshold. This improves the convenience and practicality of low-pressure protection for the air conditioner, and prevents damage to the air conditioner (e.g., the compressor in the air conditioner) under low pressure conditions, thereby reducing the service life and reliability of the air conditioner. This also helps to improve the service life and reliability of the air conditioner.

[0106] Based on the same inventive concept, another embodiment of the present invention provides a structural schematic diagram of a low-pressure protection device for an air conditioner. Please refer to... Figure 4 The device 40 shown includes a judgment module 401, an acquisition module 402, and a protection module 403, wherein:

[0107] The judgment module 401 is used to determine whether the current outdoor ambient temperature of the air conditioner meets the first preset condition.

[0108] The acquisition module 402 is used to acquire the suction pressure of the compressor in the air conditioner when the outdoor ambient temperature meets the first preset condition.

[0109] The protection module 403 is used to provide low-pressure protection for the air conditioner when a second preset condition is met; wherein the second preset condition includes at least the suction pressure being less than a preset pressure threshold.

[0110] In some implementations, the determination module 401 is specifically used for:

[0111] Determine whether the current outdoor ambient temperature of the air conditioner is greater than a first preset temperature;

[0112] If so, then it is determined that the current outdoor ambient temperature of the air conditioner meets the first preset condition.

[0113] In some implementations, the determination module 401 is further specifically used for:

[0114] When the outdoor ambient temperature is less than or equal to a first preset temperature, it is determined whether the outdoor ambient temperature is greater than a second preset temperature, wherein the first preset temperature is greater than the second preset temperature;

[0115] If so, determine whether the running time of the air conditioner has reached the first preset time.

[0116] If so, it is determined that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition; wherein, the first preset condition includes that the outdoor ambient temperature is less than or equal to the first preset temperature and greater than the second outdoor temperature, and that the running time reaches the first preset duration.

[0117] In some implementations, the determination module 401 is further specifically used for:

[0118] When the outdoor ambient temperature is less than or equal to the second preset temperature, it is determined whether the operating time of the air conditioner has reached the second preset time.

[0119] If so, it is determined that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition; wherein, the first preset condition includes the outdoor ambient temperature being less than or equal to the second preset temperature, and the running time reaching the second preset duration.

[0120] In some implementations, the protection module 302 is specifically used for:

[0121] When the inhalation pressure is less than the pressure threshold, the duration of the low pressure is recorded, wherein the duration of the low pressure is the duration corresponding to the inhalation pressure being less than the pressure threshold;

[0122] When the duration of low pressure exceeds a third preset duration, the air conditioner is protected against low pressure; wherein, the second preset condition further includes the duration of low pressure exceeding the third preset duration.

[0123] In some implementations, before determining whether the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition, the determination module 401 is specifically used for:

[0124] Determine whether the air conditioner is operating in a preset mode;

[0125] If so, then continue with the step of determining whether the current outdoor ambient temperature of the air conditioner meets the first preset condition.

[0126] In some embodiments, the device further includes a processing module 403, wherein the processing module 403 is used to maintain the normal operation of the air conditioner when the first preset condition and / or the second preset condition are not met.

[0127] In some implementations, the protection module 402 is specifically configured to perform any of the following:

[0128] The power to the air conditioner was cut off.

[0129] The compressor is shut down.

[0130] Open the pressure shut-off valve of the air conditioner.

[0131] For any content not introduced or described in the embodiments of the present invention, please refer to the specific description in the foregoing method embodiments; it will not be repeated here.

[0132] Please see Figure 5 This is a structural schematic diagram of an air conditioner provided in an embodiment of the present invention. Figure 5 The air conditioner 50 shown includes one or more processors 502 and one or more memories 504, wherein the one or more memories 504 store at least one piece of program code, which is loaded and executed by the one or more processors 502 to implement the low-pressure protection method of the air conditioner according to any embodiment of the first aspect.

[0133] Among them, Figure 5 In this document, a bus architecture (represented by bus 500) is used. Bus 500 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 502 and memory represented by memory 504. Bus 500 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 505 provides an interface between bus 500 and receiver 501 and transmitter 503. Receiver 501 and transmitter 503 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 502 is responsible for managing bus 500 and general processing, while memory 504 can be used to store data used by processor 502 during operation.

[0134] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0135] In the several embodiments provided by this invention, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection can be through some interfaces; the indirect coupling or communication connection of units or modules can be electrical or other forms.

[0136] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0137] If the integrated unit is implemented as 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 technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0138] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0139] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A low-pressure protection method for an air conditioner, characterized in that, The air conditioner is in cooling mode or dehumidification mode, and the method includes: Determine whether the current outdoor ambient temperature of the air conditioner meets the first preset condition; The step of determining whether the current outdoor ambient temperature of the air conditioner meets the first preset condition includes: Determine whether the current outdoor ambient temperature of the air conditioner is greater than a first preset temperature; If so, then it is determined that the current outdoor ambient temperature of the air conditioner meets the first preset condition; When the outdoor ambient temperature is less than or equal to a first preset temperature, it is determined whether the outdoor ambient temperature is greater than a second preset temperature, wherein the first preset temperature is greater than the second preset temperature; If so, determine whether the running time of the air conditioner has reached the first preset time. If so, then it is determined that the current outdoor ambient temperature of the air conditioner meets the first preset condition; If the first preset condition is met, the suction pressure of the compressor in the air conditioner is obtained; When a second preset condition is met, the air conditioner is protected against low pressure; wherein the second preset condition includes at least the suction pressure being less than a preset pressure threshold.

2. The method according to claim 1, characterized in that, The step of determining whether the current outdoor ambient temperature of the air conditioner meets the first preset condition also includes: When the outdoor ambient temperature is less than or equal to the second preset temperature, it is determined whether the operating time of the air conditioner has reached the second preset time. If so, it is determined that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition; wherein, the first preset condition includes the outdoor ambient temperature being less than or equal to the second preset temperature, and the running time reaching the second preset duration.

3. The method according to claim 1, characterized in that, The step of providing low-pressure protection to the air conditioner when the second preset condition is met includes: When the inhalation pressure is less than the pressure threshold, the duration of the low pressure is recorded, wherein the duration of the low pressure is the duration corresponding to the inhalation pressure being less than the pressure threshold; When the duration of low pressure exceeds a third preset duration, the air conditioner is protected against low pressure; wherein, the second preset condition further includes the duration of low pressure exceeding the third preset duration.

4. The method according to any one of claims 1-3, characterized in that, Before determining whether the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition, the method further includes: Determine whether the air conditioner is operating in a preset mode; If so, then continue with the step of determining whether the current outdoor ambient temperature of the air conditioner meets the first preset condition.

5. The method according to any one of claims 1-3, characterized in that, The method further includes: The air conditioner shall maintain normal operation when the first preset condition and / or the second preset condition are not met.

6. The method according to any one of claims 1-3, characterized in that, The low-pressure protection of the air conditioner includes any one of the following: The power to the air conditioner was cut off. The compressor is shut down. Open the pressure shut-off valve of the air conditioner.

7. A low-voltage protection device for an air conditioner, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method as described in any one of claims 1-6.

8. An air conditioner, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method as described in any one of claims 1-6.

9. A low-voltage protection device for an air conditioner, characterized in that, The air conditioner is in cooling mode or dehumidification mode. The device includes: a judgment module, an acquisition module, and a protection module, wherein: The judgment module is used to determine whether the current outdoor ambient temperature of the air conditioner meets the first preset condition. The determination module is specifically used to determine whether the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition, including: determining whether the outdoor ambient temperature where the air conditioner is currently located is greater than the first preset temperature; if so, determining that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition; when the outdoor ambient temperature is less than or equal to the first preset temperature, determining whether the outdoor ambient temperature is greater than the second preset temperature, wherein the first preset temperature is greater than the second preset temperature; if so, determining whether the running time of the air conditioner has reached the first preset duration; if so, determining that the outdoor ambient temperature where the air conditioner is currently located meets the first preset condition. The acquisition module is used to acquire the suction pressure of the compressor in the air conditioner when the outdoor ambient temperature meets the first preset condition. The protection module is used to provide low-pressure protection for the air conditioner when a second preset condition is met; wherein the second preset condition includes at least the suction pressure being less than a preset pressure threshold.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method as described in any one of claims 1-6.

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