Refrigerant leakage detection method, air conditioner, computer device and readable storage medium

Abstract

The invention provides a refrigerant leakage detection method, an air conditioner, a computer device and a readable storage medium, and the refrigerant leakage detection method comprises the steps that when a compressor is in a working state, in a refrigeration mode, the air outlet temperature Tn of the outdoor side of the air conditioner and the exhaust saturation temperature Tm of the compressor are obtained; whether the following two conditions are met at the same time or not is judged, wherein the first condition is that the difference value T between the Tn and the preset air outlet temperature T0 of the outdoor side of the air conditioner is smaller than or equal to a preset threshold value Tp; the second condition is that Tn is larger than Touter ring; if yes, it is judged that refrigerant leakage does not occur in the air conditioner; if not, when the condition that T is larger than Tp is met, whether the condition that Tm is smaller than Tm0 is met or not is further judged; if the condition that Tm is smaller than Tm0 is met, whether the input current Ix of the compressor is smaller than the preset input current I0 of the compressor or not is further judged; if yes, refrigerant leakage of the air conditioner is judged. According to the refrigerant leakage detection method, the leakage of the system refrigerant can be timely and effectively detected, the detection accuracy is ensured, and the false alarm condition is prevented.

Description

Technical Field

[0001] The present invention relates to the field of refrigerant leakage detection methods, and in particular to a refrigerant leakage detection method, an air conditioner, a computer device and a readable storage medium. Background Art

[0002] R290 refrigerant is a new type of environmentally friendly refrigerant with low global warming potential and high energy efficiency. At present, there are three common situations of refrigerant leakage. The first is that the refrigerant itself leaks before installation; the second is that when the air conditioner is installed, the refrigerant in the system leaks due to the need to move the air conditioner; the third is that the air conditioner ages after being used for a long time, which can cause refrigerant leakage. The detection of refrigerant leakage is carried out based on the detection device. Usually, the detection range of the detection device is limited, the detection accuracy is not very high, and the cost is relatively expensive. It is impossible to evaluate the operating status of the whole machine and the versatility is relatively low. For air conditioner users, usually only when the cooling and heating effects of the air conditioner are not obvious will they notice the refrigerant leakage of the air conditioner.

[0003] There is a method for detecting refrigerant leakage. First, the current load index of the air conditioner is obtained, wherein the load index of the air conditioner includes the input current of the built-in compressor of the air conditioner or the whole machine input current of the air conditioner; whether the current load index of the air conditioner is less than a first threshold value is determined; wherein the first threshold value is the load index of the air conditioner under the minimum load when the refrigerant of the air conditioner is not leaking; if so, it is determined that the refrigerant in the air conditioner has leaked, and if not, it is determined that the refrigerant in the air conditioner has not leaked.

[0004] There is also a refrigerant leakage detection method for air conditioners, which obtains a first comparison result by comparing whether a first refrigerant pressure value is greater than a preset refrigerant pressure value, wherein the preset refrigerant pressure value is a pre-set minimum refrigerant pressure value at the current outdoor ambient temperature at which no refrigerant leakage occurs; and determines whether a refrigerant leakage occurs in the air conditioner based on the first comparison result.

[0005] Therefore, the prior art usually relies only on sensor devices or single current and pressure changes to determine system refrigerant leakage, which is prone to false alarms and low detection reliability. Summary of the invention

[0006] The first object of the present invention is to provide a refrigerant leakage detection method which can timely and effectively detect the leakage of system refrigerant in refrigeration mode, ensure the detection accuracy, and prevent false alarms.

[0007] A second object of the present invention is to provide a refrigerant leakage detection method that can timely and effectively detect system refrigerant leakage in heating mode, ensure detection accuracy, and prevent false alarms.

[0008] A third object of the present invention is to provide an air conditioner that implements the above-mentioned refrigerant leakage detection method.

[0009] A fourth object of the present invention is to provide a computer device for implementing the above-mentioned refrigerant leakage detection method.

[0010] A fifth object of the present invention is to provide a readable storage medium for implementing the above-mentioned refrigerant leakage detection method.

[0011] To achieve the first objective, the present invention provides a refrigerant leakage detection method, comprising: when the compressor is in operation, in the cooling mode, obtaining the air outlet temperature T n And the exhaust saturation temperature of the compressor T m ; Determine whether the following two conditions are met at the same time: Condition 1: The air outlet temperature T n The difference △T from the preset air outlet temperature T0 of the air conditioner outdoor is less than or equal to the preset threshold value T p ; Condition 2: The air outlet temperature outside the air conditioner is T n Greater than the outdoor ambient temperature T 外环 ; If the above two conditions are met at the same time, it is determined that the air conditioner has no refrigerant leakage; if the above two conditions are not met at the same time, and △T>T p When the exhaust gas saturation temperature T of the compressor is further determined m Is it less than the preset compressor exhaust saturation temperature T m0 ; If T is satisfied m <T m0 If the condition is met, the compressor input current I x Is it less than the preset compressor input current I0? If so, it is determined that the air conditioner has a refrigerant leak.

[0012] It can be seen from the above scheme that the existing scheme of judging refrigerant leakage by detecting the outlet air temperature and return air temperature of the indoor unit will be affected by many factors, such as the cleanliness of the evaporator and the filter, the working status of the fan and the compressor, etc. When used alone, the detection result may not be accurate enough, and other possibilities need to be eliminated to determine that it is a refrigerant leakage. The judgment process is complicated and the misjudgment rate is high. The present invention judges whether the refrigerant is leaking by judging the change of the outlet air temperature on the outdoor side. It is more accurate in detecting refrigerant leakage and more directly reflects the heat exchange of the refrigerant system. The sensitivity to refrigerant leakage is high, because insufficient refrigerant will significantly affect the heat exchange efficiency of the condenser, resulting in a significant change in the outdoor outlet air temperature.

[0013] In addition, the present invention tests whether the exhaust saturation temperature of the compressor is less than the air outlet temperature outside the air conditioner room. If the exhaust saturation temperature is less than the air outlet temperature outside the air conditioner room, it indicates that the air conditioner may have a refrigerant leak. The exhaust saturation temperature of the compressor refers to the temperature at the exhaust port of the compressor when the refrigerant is in a saturated state (i.e., liquid and gas coexist). The exhaust saturation temperature reflects the state of the refrigerant discharged by the compressor at the inlet of the condenser. For the air conditioning system, when the leak is located between the compressor and the condenser pipeline, the compressor exhaust saturation temperature and the outdoor unit outlet temperature can be used to detect the problem of the refrigerant quantity in the system at the first time, so the test results of the present invention are more accurate and efficient. The problem of inaccurate test results when testing the exhaust temperature of the compressor is avoided, because the exhaust temperature reflects the process of the compressor compressing the low-pressure and low-temperature refrigerant gas into a high-temperature and high-pressure gas. If there is a leak in the pipeline between the compressor and the condenser, it cannot be quickly reflected by the exhaust temperature.

[0014] In addition, the present invention confirms that the cause is refrigerant leakage by measuring the changes in exhaust saturation temperature and outlet air temperature, and detects the current of the compressor without changing the air conditioner system parameters to ensure the accuracy of the result, and can more accurately determine whether the cause is refrigerant leakage with higher reliability. This avoids the occurrence of false alarms caused by adjusting the opening of the electronic expansion valve before detecting the current when the compressor is overheated.

[0015] A preferred solution is that after determining that the air conditioner has refrigerant leakage, the refrigerant leakage rate calculation step is entered: the refrigerant leakage rate v is positively correlated with the preset relationship value m, and the calculation formula of the m value is as follows: Where: C p is the specific heat capacity of the refrigerant, in J / (kg·K); ΔT is the change in the air outlet temperature on the outdoor side of the air conditioner, in ℃; Q is the cooling capacity of the air conditioner, in W; L is the latent heat of the refrigerant, in J / kg.

[0016] A further solution is that after the refrigerant leakage rate calculation step, the refrigerant leakage detection method also includes a refrigerant leakage rate judgment step: if 0<v≤0.2, the air conditioner is determined to be in a slow leakage state; if 0.2<v≤1, the air conditioner is determined to be in a fast leakage state.

[0017] It can be seen that the amount of refrigerant leakage can be calculated based on the measured parameters, and then the refrigerant leakage speed in the system can be obtained, so as to evaluate the size of the leakage diameter in the system pipeline. This result can be used to evaluate the risk of the air-conditioning system, and then remind the user to have a larger or smaller leakage diameter in the air-conditioning system during the inspection process, and remind the user to repair it in time to ensure the safety of the user's life and property to the greatest extent.

[0018] A further solution is that the refrigerant leakage rate judgment step also includes: if the air conditioner is in a slow leakage state, the compressor is controlled to stop, and the inside of the air-conditioning room is controlled to send a first reminder signal; if the air conditioner is in a fast leakage state, the compressor is controlled to stop, and the inside of the air-conditioning room is controlled to send a second reminder signal.

[0019] A preferred solution is to obtain the air outlet temperature T n And the exhaust saturation temperature of the compressor T m The steps include: obtaining the air outlet temperature T of the air conditioner outside the room every preset time period. n And the exhaust saturation temperature of the compressor T m .

[0020] It can be seen that by detecting the outdoor air outlet temperature and the exhaust saturation temperature at a preset frequency, it is ensured that when the air conditioning system refrigerant leaks, it can be detected in time.

[0021] A preferred solution is to determine whether the compressor is in working state by determining whether the input current of the compressor is 0, or determining whether the whole input current of the air conditioner is equal to the whole current of the air conditioner in the air supply state.

[0022] To achieve the second objective, the present invention provides a refrigerant leakage detection method, comprising: when the compressor is in operation, in the heating mode, obtaining the air outlet temperature T n And the exhaust saturation temperature of the compressor T m ; Determine whether the following two conditions are met at the same time: Condition 1, the preset air outlet temperature T0 of the air conditioner outside the room and the air outlet temperature T n The difference △T is less than or equal to the preset threshold T p ; Condition 2: The air outlet temperature outside the air conditioner is T n Less than the outdoor ambient temperature T 外环 ; If the above two conditions are met at the same time, it is determined that the air conditioner has no refrigerant leakage; if the above two conditions are not met at the same time, and △T>T p When the exhaust gas saturation temperature T of the compressor is further determined m Is it less than the preset compressor exhaust saturation temperature T m0 ; If T is satisfied m <T m0 If the condition is met, the compressor input current I x Is it less than the preset compressor input current I0? x <I0, it is determined that the air conditioner has refrigerant leakage.

[0023] To achieve the third objective, the present invention provides an air conditioner, the air conditioner comprising a processor, the processor being configured to implement the refrigerant leakage detection method when executing a program stored in a memory.

[0024] To achieve the fourth objective, the present invention provides a computer device, which includes a processor, and the processor is used to implement the above-mentioned refrigerant leakage detection method when executing a program stored in a memory.

[0025] To achieve the fifth objective, the present invention provides a readable storage medium having a program stored thereon, and when the program is executed by a processor, the refrigerant leakage detection method described above is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of an embodiment of a refrigerant leakage detection method of the present invention.

[0027] Figure 2 This is a flow chart after determining that a refrigerant leak occurs in an air conditioner in an embodiment of the refrigerant leak detection method of the present invention.

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0030] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] In the present invention, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0032] All terms (including technical terms or scientific terms) used in the present invention have the same meanings as those understood by ordinary technicians in the field, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0034] The air conditioner of this embodiment includes an air conditioner outdoor unit and an air conditioner indoor unit connected to each other, the air conditioner outdoor unit includes a compressor, a condenser and an outdoor fan, etc., the air conditioner indoor unit includes an evaporator, an indoor fan and a processor, etc., the compressor, the condenser and the evaporator constitute a refrigerant circulation system, and the processor is used to implement the following refrigerant leakage detection method when executing the program stored in the memory. In other embodiments, the air conditioner can also be an all-in-one machine or a window machine, etc.

[0035] When the air conditioner is running stably in cooling mode or heating mode, obtain and record the air outlet temperature T0 of the air conditioner outside, the input current I0 of the compressor, and the exhaust saturation temperature T m0 , this current is the input current of the compressor of the air conditioner under minimum load when the refrigerant of the air conditioner has not leaked. Among them, after the air conditioner enters the cooling mode and runs for a preset time, such as 5 minutes, it can be considered that the air conditioner is running stably in the cooling mode. The process of presetting the above parameters is carried out during the production test process. The set temperature is the target temperature of cooling or heating of the indoor unit set by the operator through the regulator. A set temperature corresponds to a unique T0, I0 and T m0 value.

[0036] See also Figure 1 , the refrigerant leakage detection method comprises the following steps:

[0037] First, execute step S1 to determine whether at least one of the following conditions is met: Condition 1, the input current of the compressor is 0; Condition 2, the whole machine input current of the air conditioner is equal to the whole machine current of the air conditioner in the air supply state.

[0038] If not, it means that the compressor is in working state. In the cooling mode, step S2 is executed to obtain the air outlet temperature T of the air conditioner outside every preset time period △t. n And the exhaust saturation temperature of the compressor T m .

[0039] Next, step S3 is executed to determine whether the following two conditions are met at the same time: Condition 1: the air outlet temperature T n The difference △T between the preset air outlet temperature T0 of the air conditioner outdoor under the set temperature is less than or equal to the preset threshold value T p ; Condition 2: The air outlet temperature outside the air conditioner is T n Greater than the outdoor ambient temperature T 外环 .

[0040] If yes, step S4 is executed to determine whether there is no refrigerant leakage in the air conditioner.

[0041] If not, and △T>T p When the condition is met, step S5 is executed to further determine the exhaust gas saturation temperature T of the compressor. m Is it lower than the preset exhaust saturation temperature T of the compressor at the set temperature? m0 .

[0042] If T m <T m0 If the condition is met, step S6 is executed to further determine the input current I of the compressor. x Is it less than the preset compressor input current I0 at the set temperature?

[0043] If so, step S7 is executed to determine whether the air conditioner has a refrigerant leak.

[0044] The refrigerant leakage detection method in the heating mode is similar to the refrigerant leakage detection method in the cooling mode, except that the two conditions in the above step S3 are: Condition 1, the preset air outlet temperature T0 of the air conditioner outdoor under the set temperature is different from the air outlet temperature T n The difference △T is less than or equal to the preset threshold T p ; Condition 2: The air outlet temperature outside the air conditioner is T n Less than the outdoor ambient temperature T 外环 .

[0045] See also Figure 2 After determining that the air conditioner has refrigerant leakage, execute step S81 to enter the refrigerant leakage rate calculation step: the refrigerant leakage rate v is positively correlated with the m value, the unit of v is g / s, and the calculation formula of the m value is as follows: Where: m is the preset relationship value, C pis the specific heat capacity of the refrigerant, in J / (kg·K); ΔT is the change in the air outlet temperature on the outdoor side of the air conditioner, in ℃; Q is the cooling capacity of the air conditioner, in W; L is the latent heat of the refrigerant, in J / kg.

[0046] Next, step S82 is executed to enter the refrigerant leakage rate judgment step: if 0<v≤0.2g / s, step S83 is executed to determine that the air conditioner is in a slow leakage state, the compressor is controlled to stop, and the air conditioner indoor side is controlled to send a first reminder signal; if v>0.2g / s, step S84 is executed to determine that the air conditioner is in a fast leakage state, the compressor is controlled to stop, and the air conditioner indoor side is controlled to send a second reminder signal. The first reminder signal and the second reminder signal are different codes displayed on the display screen of the indoor unit.

[0047] As can be seen from the above, the existing scheme of judging refrigerant leakage by detecting the outlet air temperature and return air temperature of the indoor unit will be affected by many factors, such as the cleanliness of the evaporator and the filter, the working status of the fan and the compressor, etc. When used alone, the detection result may not be accurate enough, and other possibilities need to be eliminated to determine that it is a refrigerant leakage. The judgment process is complicated and the misjudgment rate is high. The present invention judges whether the refrigerant is leaking by judging the change of the outlet air temperature on the outdoor side. It is more accurate in detecting refrigerant leakage and more directly reflects the heat exchange of the refrigerant system. The sensitivity to refrigerant leakage is high, because insufficient refrigerant will significantly affect the heat exchange efficiency of the condenser, resulting in a significant change in the outdoor outlet air temperature.

[0048] In addition, the present invention tests whether the exhaust saturation temperature of the compressor is less than the air outlet temperature outside the air conditioner room. If the exhaust saturation temperature is less than the air outlet temperature outside the air conditioner room, it indicates that the air conditioner may have a refrigerant leak. The exhaust saturation temperature of the compressor refers to the temperature at the exhaust port of the compressor when the refrigerant is in a saturated state (i.e., liquid and gas coexist). The exhaust saturation temperature reflects the state of the refrigerant discharged by the compressor at the inlet of the condenser. For the air conditioning system, when the leak is located between the compressor and the condenser pipeline, the compressor exhaust saturation temperature and the outdoor unit outlet temperature can be used to detect the problem of the refrigerant quantity in the system at the first time, so the test results of the present invention are more accurate and efficient. The problem of inaccurate test results when testing the exhaust temperature of the compressor is avoided, because the exhaust temperature reflects the process of the compressor compressing the low-pressure and low-temperature refrigerant gas into a high-temperature and high-pressure gas. If there is a leak in the pipeline between the compressor and the condenser, it cannot be quickly reflected by the exhaust temperature.

[0049] In addition, the present invention confirms that the cause is refrigerant leakage by measuring the changes in exhaust saturation temperature and outlet air temperature, and detects the current of the compressor without changing the air conditioner system parameters to ensure the accuracy of the result, and can more accurately determine whether the cause is refrigerant leakage with higher reliability. This avoids the occurrence of false alarms caused by adjusting the opening of the electronic expansion valve before detecting the current when the compressor is overheated.

[0050] At the same time, the amount of refrigerant leakage is calculated based on the measured parameters, and the speed of refrigerant leakage in the system is obtained, thereby evaluating the size of the leakage diameter in the system pipeline. This result can be used to evaluate the risk of the air-conditioning system, and then remind the user to have a larger or smaller leakage diameter in the air-conditioning system during the inspection process, and remind the user to repair it in time to ensure the safety of the user's life and property to the greatest extent.

[0051] Computer device embodiment:

[0052] The computer device of the present invention is a controller, including a processor and a memory, such as a single chip microcomputer including a central processing unit, etc. Moreover, the processor is used to implement the steps of the above-mentioned refrigerant leakage detection method when executing the computer program stored in the memory.

[0053] The processor may be a central processing unit (CPU), 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, etc.

[0054] The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0055] Computer readable storage medium embodiment:

[0056] The computer-readable storage medium of the present invention can be any form of storage medium that can be read by a processor of a computer device, including but not limited to non-volatile memory, volatile memory, ferroelectric memory, etc. A computer program is stored on the computer-readable storage medium. When the processor of the computer device reads and executes the computer program stored in the memory, the steps of the above-mentioned refrigerant leakage detection method can be implemented.

[0057] A computer program includes computer program code, which may be in source code form, object code form, executable file or some intermediate form, etc. Computer readable media may include: any entity or device capable of carrying 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), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer readable media do not include electric carrier signals and telecommunication signals.

[0058] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A refrigerant leakage detection method, characterized in that: include: When the compressor is in operation, in cooling mode, the air outlet temperature Tn on the outdoor side of the air conditioner and the exhaust saturation temperature Tm of the compressor are obtained; Determine whether the following two conditions are met at the same time: Condition 1: the difference △T between the air outlet temperature Tn on the outdoor side of the air conditioner and the preset air outlet temperature T0 on the outdoor side of the air conditioner is less than or equal to the preset threshold value Tp; Condition 2: the air outlet temperature Tn on the outdoor side of the air conditioner is greater than the outdoor ambient temperature T 外环 ; If the above two conditions are met at the same time, it is determined that the air conditioner has no refrigerant leakage; If the above two conditions are not met at the same time, and △T>Tp, it is further determined whether the exhaust gas saturation temperature Tm of the compressor is less than the preset exhaust gas saturation temperature Tm0 of the compressor; If the condition of Tm<Tm0 is met, it is further determined whether the compressor input current Ix is less than the preset compressor input current I0; If Ix<I0, it is determined that refrigerant leakage occurs in the air conditioner.

2. The refrigerant leakage detection method according to claim 1, characterized in that: After determining that the air conditioner has refrigerant leakage, enter the refrigerant leakage rate calculation steps: The leakage rate v of the refrigerant is positively correlated with the preset relationship value m. The calculation formula of the m value is as follows: Where: Cp is the specific heat capacity of the refrigerant, in J / (kg·K); ΔT is the change in the air outlet temperature outside the air conditioner room, in °C; Q is the cooling capacity of the air conditioner, in W; L is the latent heat of the refrigerant, and its unit is J / kg.

3. The refrigerant leakage detection method according to claim 2, characterized in that: After the refrigerant leakage rate calculation step, the refrigerant leakage detection method further comprises a refrigerant leakage rate determination step: If 0<v≤0.2, the air conditioner is judged to be in a slow leakage state; If v>0.2, it is determined that the air conditioner is in a rapid leakage state.

4. The refrigerant leakage detection method according to claim 3, characterized in that: The refrigerant leakage rate determination step also includes: If the air conditioner is in a slow leakage state, the compressor is controlled to stop, and the inside of the air conditioner is controlled to send a first reminder signal; If the air conditioner is in a rapid leakage state, the compressor is controlled to stop, and the inside of the air-conditioning room is controlled to send a second reminder signal.

5. The refrigerant leakage detection method according to any one of claims 1 to 4, characterized in that: Get the air outlet temperature T of the air conditioner outside n And the exhaust saturation temperature of the compressor T m The steps include: Get the air outlet temperature T of the air conditioner outside every preset time period n And the exhaust saturation temperature of the compressor T m .

6. The refrigerant leakage detection method according to any one of claims 1 to 4, characterized in that: Whether the compressor is in working state is determined by determining whether the input current of the compressor is 0, or determining whether the whole input current of the air conditioner is equal to the whole current of the air conditioner in the air supply state.

7. A refrigerant leakage detection method, characterized in that: include: When the compressor is in operation, in heating mode, obtain the air outlet temperature T outside the air conditioner n And the exhaust saturation temperature of the compressor T m ; Determine whether the following two conditions are met at the same time: Condition 1: The preset air outlet temperature T0 of the air conditioner outside the room and the air outlet temperature T n The difference △T is less than or equal to the preset threshold T p ; Condition 2: The air outlet temperature outside the air conditioner is T n Less than the outdoor ambient temperature T 外环 ; If the above two conditions are met at the same time, it is determined that the air conditioner has no refrigerant leakage; If the above two conditions are not met at the same time, and △T>T p When the condition is met, the exhaust saturation temperature T of the compressor is further determined. m Is it less than the preset compressor exhaust saturation temperature T m0 ; If T m <T m0 If the condition is met, the compressor input current I x Is it less than the preset compressor input current I0? If I x <I0, it is determined that the air conditioner has refrigerant leakage.

8. An air conditioner, characterized in that: The air conditioner comprises a processor, and the processor is used to implement the refrigerant leakage detection method according to any one of claims 1 to 7 when executing a program stored in a memory.

9. A computer device, characterized in that: The computer device comprises a processor, and the processor is used to implement the refrigerant leakage detection method according to any one of claims 1 to 7 when executing a program stored in a memory.

10. A readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the refrigerant leakage detection method according to any one of claims 1 to 7 is implemented.

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