CN107421151A - Air conditioner and its coolant leakage detection method and device - Google Patents

Abstract

The invention discloses an air conditioner and a refrigerant leakage detection method and device thereof, wherein the method includes the following steps: when the air conditioner is turned on in cooling mode or dehumidification mode, detecting whether the compressor of the air conditioner is started; Afterwards, the indoor air inlet temperature, indoor heat exchanger temperature, outdoor ambient temperature, and exhaust temperature of the compressor are obtained, and the continuous running time of the compressor is obtained after the compressor is currently started; according to the indoor air inlet temperature, indoor heat exchanger The heater temperature, outdoor ambient temperature, exhaust temperature and continuous running time can be used to determine whether the refrigerant of the air conditioner is leaking. According to the method of the present invention, it is possible to timely and accurately detect whether the refrigerant of the air conditioner leaks, so that corresponding measures can be taken in time when the refrigerant leaks, thereby ensuring the normal operation of the air conditioner and improving the service life of the compressor.

Description

Air conditioner and refrigerant leakage detection method and device thereof

technical field

The invention relates to the technical field of air conditioners, in particular to a method for detecting refrigerant leakage of an air conditioner, a non-transitory computer-readable storage medium, a device for detecting refrigerant leakage of an air conditioner, and an air conditioner.

Background technique

Along with improving day by day of people's living standard, air conditioner has become necessary household electrical appliance in people's life. The refrigerating system of the existing air conditioner comprises a compressor, an outdoor heat exchanger, a throttling device, an indoor heat exchanger and a certain amount of refrigerant charged in advance. The air conditioner can operate normally in cooling mode when there is no refrigerant leakage. During the use of the air conditioner, it is inevitable that there will be irregular installation of the air conditioner or vibration during later operation. These phenomena may cause the refrigerant of the air conditioner to leak, thereby deteriorating the cooling effect of the air conditioner.

When the refrigerant leakage of the air conditioner is serious, the compressor is often burned. Especially for the air conditioner developed for the T3 working condition, due to the high ambient temperature, once the refrigerant in the air conditioner leaks, the exhaust temperature of the compressor will rise rapidly. If the compressor cannot be shut down in time and a fault is reported, the compressor will easily be damaged. However, the current refrigerant detection methods for air conditioners are generally prone to false positives or false positives under high-humidity operating conditions.

Contents of the invention

The present invention aims to solve one of the technical problems in the above-mentioned technologies at least to a certain extent. For this reason, an object of the present invention is to provide a refrigerant leakage detection method for an air conditioner, which can accurately detect whether the refrigerant of the air conditioner leaks in time, so that corresponding measures can be taken in time when the refrigerant leaks, thereby ensuring the air conditioner. Normal operation, and can improve the service life of the compressor.

A second object of the present invention is to propose a non-transitory computer-readable storage medium.

The third object of the present invention is to provide a refrigerant leakage detection device for an air conditioner.

A fourth object of the present invention is to provide an air conditioner.

In order to achieve the above object, the embodiment of the first aspect of the present invention proposes a refrigerant leakage detection method of an air conditioner, the method includes the following steps: when the air conditioner is turned on in cooling mode or dehumidification mode, detecting the leakage of the air conditioner Whether the compressor is started; after the compressor is started, obtain the indoor air inlet temperature, indoor heat exchanger temperature, outdoor ambient temperature and the discharge temperature of the compressor of the air conditioner, and obtain the current The continuous running time after startup; judge whether the refrigerant of the air conditioner leaks according to the indoor air inlet temperature, the indoor heat exchanger temperature, the outdoor ambient temperature, the exhaust temperature and the continuous running time .

According to the refrigerant leakage detection method of the air conditioner in the embodiment of the present invention, when the air conditioner is turned on in the cooling mode or the dehumidification mode, after the compressor of the air conditioner is started, the indoor air temperature of the air conditioner, the indoor heat exchanger temperature , the outdoor ambient temperature, the discharge temperature of the compressor, and the continuous running time of the compressor after it is currently started to judge whether the refrigerant of the air conditioner leaks. Thus, it is possible to timely and accurately detect whether the refrigerant of the air conditioner leaks, so that corresponding measures can be taken in time when the refrigerant leaks, thereby ensuring the normal operation of the air conditioner and prolonging the service life of the compressor.

In addition, the method for detecting refrigerant leakage of an air conditioner according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

Specifically, judging whether the refrigerant of the air conditioner leaks according to the indoor air inlet temperature, the indoor heat exchanger temperature, the outdoor ambient temperature, the exhaust temperature, and the continuous running time includes: judging Whether the outdoor environment temperature is less than or equal to the first preset temperature; if the outdoor environment temperature is less than or equal to the first preset temperature, then judge the refrigerant of the air conditioner according to the outdoor environment temperature and the exhaust temperature Whether leakage occurs; if the outdoor ambient temperature is greater than the first preset temperature, then judge whether the refrigerant of the air conditioner occurs according to the indoor air intake temperature, the indoor heat exchanger temperature and the continuous operation time leakage.

Specifically, when the outdoor ambient temperature is less than or equal to the first preset temperature, it is judged whether the exhaust gas temperature is greater than or equal to the sum of the outdoor ambient temperature and the second preset temperature which is a preset multiple; if If the discharge temperature is greater than or equal to the sum of the outdoor ambient temperature of a preset multiple and the second preset temperature, it is judged that the refrigerant of the air conditioner leaks; if the discharge temperature is less than the outdoor environment temperature of a preset multiple If the sum of the ambient temperature and the second preset temperature is used, then it is determined that the refrigerant of the air conditioner has not leaked.

Specifically, when the outdoor ambient temperature is greater than the first preset temperature, it is judged whether the continuous running time is greater than or equal to the first preset time; if the continuous running time is greater than or equal to the first preset time, then further judge whether the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is less than or equal to the first preset difference; if the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is less than or equal to the first preset difference, it is judged that the refrigerant of the air conditioner leaks; if the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is greater than the first preset difference, it is judged that the There is no leakage of the refrigerant in the above air conditioner.

Further, when it is judged that the refrigerant of the air conditioner has leaked, the number of times of refrigerant leakage is also accumulated to obtain the accumulated number of times, and the accumulated number of times is judged, wherein, when the accumulated number of times is less than the preset value When the number of times is set, the compressor is controlled to shut down for a second preset time; when the cumulative value of the number of times is greater than or equal to the preset number of times, the air conditioner is controlled to be shut down and a fault prompt message is issued.

In order to achieve the above purpose, the embodiment of the second aspect of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, wherein, when the program is executed by a processor, it implements the method proposed in the embodiment of the first aspect of the present invention Refrigerant leakage detection method for air conditioners.

According to the non-transitory computer-readable storage medium in the embodiment of the present invention, by executing the stored computer program, it is possible to timely and accurately detect whether the refrigerant of the air conditioner leaks, so that corresponding measures can be taken in time when the refrigerant leaks, thereby enabling Ensure the normal operation of the air conditioner and improve the service life of the compressor.

In order to achieve the above purpose, the embodiment of the third aspect of the present invention proposes a refrigerant leakage detection device for an air conditioner, the device includes: a monitoring module, the monitoring module is used to Detecting whether the compressor of the air conditioner is started; the temperature acquisition component is used to acquire the indoor air intake temperature, indoor heat exchanger temperature, and outdoor environment of the air conditioner after the compressor is started. temperature and the discharge temperature of the compressor; a time acquisition module, the time acquisition module is used to obtain the continuous running time of the compressor after it is currently started; a main control module, the main control module is used for according to the indoor The temperature of the air inlet, the temperature of the indoor heat exchanger, the temperature of the outdoor environment, the temperature of the exhaust gas and the duration of operation determine whether the refrigerant of the air conditioner leaks.

According to the refrigerant leakage detection device for an air conditioner in an embodiment of the present invention, when the air conditioner is turned on in cooling mode or dehumidification mode, after the monitoring module detects that the compressor of the air conditioner is started, the main control module can obtain the The air conditioner's indoor air intake temperature, indoor heat exchanger temperature, outdoor ambient temperature, and compressor discharge temperature, as well as the continuous running time of the compressor acquired by the time acquisition module, judge whether the refrigerant of the air conditioner leaks. Thus, it is possible to timely and accurately detect whether the refrigerant of the air conditioner leaks, so that corresponding measures can be taken in time when the refrigerant leaks, thereby ensuring the normal operation of the air conditioner and prolonging the service life of the compressor.

In addition, the refrigerant leakage detection device for an air conditioner according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

Specifically, the main control module is used to judge whether the outdoor environment temperature is less than or equal to a first preset temperature, and when the outdoor environment temperature is less than or equal to the first preset temperature, according to the outdoor environment temperature and The exhaust temperature determines whether the refrigerant of the air conditioner leaks, and when the outdoor ambient temperature is greater than the first preset temperature, according to the indoor air intake temperature, the indoor heat exchanger temperature and the It is judged whether the refrigerant of the air conditioner leaks according to the continuous running time.

Specifically, the main control module is used to determine whether the exhaust gas temperature is greater than or equal to a preset multiple of the outdoor ambient temperature and a second preset temperature when the outdoor ambient temperature is less than or equal to the first preset temperature. temperature, and when the exhaust temperature is greater than or equal to the sum of the outdoor ambient temperature and the second preset temperature, which is a preset multiple, it is judged that the refrigerant of the air conditioner leaks, and when the exhaust temperature is less than When the sum of the outdoor ambient temperature and the second preset temperature is a preset multiple, it is determined that the refrigerant of the air conditioner does not leak.

Specifically, the main control module is used to judge whether the continuous running time is greater than or equal to a first preset time when the outdoor ambient temperature is greater than the first preset temperature, and determine whether the continuous running time is greater than or equal to the first preset time During the first preset time, it is further judged whether the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is less than or equal to a first preset difference, and when the indoor air inlet temperature and the indoor heat exchanger When the difference between the heater temperature is less than or equal to the first preset difference, it is determined that the refrigerant of the air conditioner has leaked, and the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is greater than the first preset difference. When the difference is preset, it is judged that the refrigerant of the air conditioner does not leak.

Further, when the main control module judges that the refrigerant of the air conditioner has leaked, it also accumulates the number of times that the refrigerant leaks to obtain an accumulated number of times, and judges the accumulated number of times, wherein, when the When the accumulated number of times is less than the preset number of times, the main control module controls the compressor to stop for a second preset time; when the accumulated number of times is greater than or equal to the preset number of times, the main control module controls the air conditioner to shut down , and control the air conditioner to issue a fault prompt message.

Corresponding to the above embodiments, the present invention also provides an air conditioner.

The air conditioner according to the embodiment of the present invention includes the refrigerant leakage detection device for the air conditioner proposed in the above embodiment of the present invention, and its specific implementation may refer to the above embodiment, and will not be repeated here to avoid redundancy.

The air conditioner according to the embodiment of the present invention can timely and accurately detect whether the refrigerant leaks, so that corresponding measures can be taken in time when the refrigerant leaks, so as to ensure its normal operation and improve the service life of the compressor.

Description of drawings

1 is a flowchart of a method for detecting refrigerant leakage of an air conditioner according to an embodiment of the present invention;

2 is a flowchart of a method for detecting refrigerant leakage of an air conditioner according to an embodiment of the present invention;

Fig. 3 is a schematic block diagram of a refrigerant leakage detection device for an air conditioner according to an embodiment of the present invention.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The air conditioner and its refrigerant leakage detection method and device according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a method for detecting refrigerant leakage of an air conditioner according to an embodiment of the present invention.

As shown in Figure 1, the refrigerant leakage detection method of an air conditioner according to an embodiment of the present invention includes the following steps:

S1, when the air conditioner is turned on in cooling mode or dehumidification mode, it is detected whether the compressor of the air conditioner is started.

S2, after the compressor is started, acquire the indoor air inlet temperature, the indoor heat exchanger temperature, the outdoor environment temperature and the discharge temperature of the compressor, and acquire the continuous running time of the compressor after the current start.

Specifically, the indoor air inlet temperature T1, the indoor heat exchanger temperature T2, the outdoor ambient temperature T4, and the compressor discharge temperature T5 can be respectively acquired by setting temperature sensors at corresponding positions.

S3, judging whether the refrigerant of the air conditioner leaks according to the indoor air inlet temperature, the indoor heat exchanger temperature, the outdoor ambient temperature, the exhaust temperature and the continuous running time.

Specifically, it may be determined whether the outdoor ambient temperature T4 is less than or equal to the first preset temperature x. If the outdoor ambient temperature T4 is less than or equal to the first preset temperature x, it can be judged whether the refrigerant of the air conditioner leaks according to the outdoor ambient temperature T4 and the exhaust temperature T5; if the outdoor ambient temperature T4 is greater than the first preset temperature x, then it can be determined According to the indoor air inlet temperature T1, the indoor heat exchanger temperature T2 and the continuous running time t, it is judged whether the refrigerant of the air conditioner leaks. Wherein, the value of the first preset temperature x can be preset and stored so as to be recalled when judging whether the refrigerant of the air conditioner leaks. That is to say, when the outdoor ambient temperature of the air conditioner is low, it can be judged whether the refrigerant leaks according to the outdoor ambient temperature and exhaust temperature; when the outdoor ambient temperature of the air conditioner is high, it can be judged according to the indoor The temperature of the heat exchanger and the continuous running time can be used to determine whether the refrigerant leaks.

Specifically, when the outdoor ambient temperature T4 is less than or equal to the first preset temperature x, it can be determined whether the exhaust gas temperature T5 is greater than or equal to the sum of the outdoor ambient temperature b*T4 of a preset multiple and the second preset temperature a, which can be judged Whether the exhaust gas temperature T5 is greater than or equal to a+b*T4. If the discharge temperature T5 is greater than or equal to the sum of the outdoor ambient temperature b*T4 of the preset multiple and the second preset temperature a, that is, T5≥a+b*T4, it can be judged that the refrigerant of the air conditioner is leaking; if the discharge temperature If T5 is less than the sum of the outdoor ambient temperature b*T4 and the second preset temperature a of the preset multiple, that is, T5<a+b*T4, it can be determined that the refrigerant of the air conditioner does not leak. Wherein, the values of the second preset temperature a and the preset multiple b can be preset and stored so as to be recalled when judging whether the refrigerant of the air conditioner leaks.

When the outdoor ambient temperature T4 is greater than the first preset temperature x, it may be determined whether the continuous running time t is greater than or equal to the first preset time. If the continuous running time t is greater than or equal to the first preset time, it may be further determined whether the difference between the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 is less than or equal to the first preset difference y. If the difference between the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 is less than or equal to the first preset difference y, it can be judged that the refrigerant of the air conditioner has leaked; if the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 If the difference is greater than the first preset difference y, it can be judged that the refrigerant of the air conditioner has not leaked. Wherein, the value of the first preset time and the first preset difference y can be preset and stored so as to be recalled when judging whether the refrigerant of the air conditioner leaks.

Further, when it is judged that the refrigerant of the air conditioner leaks, the number of times of refrigerant leakage can also be accumulated to obtain the accumulated number N, and the accumulated number N can be judged, wherein, when the accumulated number N is less than the preset number of times , the compressor can be controlled to shut down for the second preset time; when the accumulated number of times N is greater than or equal to the preset number of times, the air conditioner can be controlled to shut down and a fault prompt message will be issued. That is to say, when the refrigerant in the air conditioner starts to leak, the compressor can be stopped to reduce the discharge temperature of the compressor, and the compressor can be restarted after waiting for a second preset time; when the refrigerant in the air conditioner leaks frequently , control the compressor to stop and report a fault. Wherein, the preset number of times and the second preset time can be preset and stored so as to be recalled when making a judgment. The air conditioner can send out fault prompt information by displaying fault signs on the display screen or making abnormal sounds.

In one embodiment of the present invention, as shown in Figure 2, the method for detecting refrigerant leakage of an air conditioner may include the following steps:

S201, the air conditioner is powered on and started.

S202, judging whether the current operation mode of the air conditioner is cooling mode or dehumidification mode. If yes, execute step S203; if no, end the current program.

S203, the number of times N of refrigerant leakage is set to 0. In one embodiment of the present invention, the number N of refrigerant leakages can be counted by an internal counter of the air conditioner. In step S203, the count value of the internal counter of the air conditioner may be set to zero.

S204, judging whether the compressor is started successfully. If yes, execute step S205; if no, execute step S204.

S205. Obtain the continuous running time t of the compressor after starting this time, the indoor air inlet temperature T1, the indoor heat exchanger temperature T2, the outdoor ambient temperature T4, and the compressor exhaust temperature T5. Wherein, the indoor air intake temperature T1 of the air conditioner, the indoor heat exchanger temperature T2, the outdoor ambient temperature T4 and the discharge temperature T5 of the compressor can be acquired respectively by setting temperature sensors at corresponding positions.

S206, judging whether T4≤x exists. If yes, execute step S207; if no, execute step S208. Among them, x can be pre-set and stored so as to be called when the refrigerant of the air conditioner is leaked.

S207, judging whether there is T5≥a+b*T4. If yes, execute step S211; if no, execute step S210. Among them, a and b can be preset and stored so as to be called when judging whether the refrigerant of the air conditioner leaks.

S208, judging whether t≥t1 exists. If yes, execute step S209; if no, continue to execute step S208. Among them, t1 can be preset and stored, so as to be called when judging whether the refrigerant of the air conditioner leaks.

S209, judging whether there is T1-T2≤y. If yes, execute step S211; if no, execute step S210. Among them, y can be preset and stored so as to be called when judging whether the refrigerant of the air conditioner leaks.

S210, judging that the refrigerant of the air conditioner does not leak.

S211, judging that the refrigerant of the air conditioner leaks.

S212, add 1 to N.

S213, judging whether there is N≤n. If yes, execute step S214; if no, execute step S215. Among them, n can be set in advance and be stored so as to be called when making a judgment.

S214, control the compressor to stop and then restart after t2. Then step S204 is executed. Wherein, t2 is preset according to the performance of the compressor. After the compressor stops for t2, it can lower its own temperature to ensure that the compressor will not be burned.

S215, controlling the shutdown of the air conditioner, and sending a fault prompt message. Wherein, the air conditioner can send fault prompt information by displaying a fault sign on the display screen or making an abnormal sound.

In a specific embodiment of the present invention, it can be judged whether the refrigerant of the air conditioner leaks according to the indoor air inlet temperature T1, the indoor heat exchanger temperature T2, the outdoor ambient temperature T4, the exhaust temperature T5 and the continuous operation time t, specifically , it can be judged whether the outdoor ambient temperature T4 is less than or equal to 30°C. If the outdoor ambient temperature T4 is less than or equal to 30°C, it can be judged according to the outdoor ambient temperature T4 and exhaust temperature T5 whether the refrigerant of the air conditioner leaks; if the outdoor ambient temperature T4 is greater than 30°C, it can be judged according to the indoor The temperature T2 of the heat exchanger and the continuous operation time t determine whether the refrigerant of the air conditioner leaks.

When the outdoor ambient temperature T4 is less than or equal to 30°C, it can be determined whether the exhaust gas temperature T5 is greater than or equal to 60+2.5*T4. If T5≥60+2.5*T4, it can be judged that the refrigerant of the air conditioner has leaked; if T5<60+2.5*T4, it can be judged that the refrigerant of the air conditioner has not leaked.

When the outdoor ambient temperature T4 is greater than 30°C, it can be judged whether the continuous running time t is greater than or equal to 5 minutes. If the continuous running time t is greater than or equal to 5 minutes, it can be further judged whether the difference between the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 is less than or equal to 3°C. If the difference between the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 is less than or equal to 3°C, it can be judged that the refrigerant of the air conditioner is leaking; if the difference between the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 is greater than 3°C , it can be judged that the refrigerant of the air conditioner has not leaked.

When it is judged that the refrigerant of the air conditioner has leaked, the number of times of refrigerant leakage can also be accumulated to obtain the accumulated number N, and the accumulated number N can be judged, wherein, when the accumulated value N is less than 3, the compression can be controlled The air conditioner is shut down for 3 minutes; when the accumulated number of times N is greater than or equal to 3, the air conditioner can be controlled to shut down and a fault prompt message will be issued. Wherein, the air conditioner can send fault prompt information by displaying a fault sign on the display screen or making an abnormal sound.

According to the refrigerant leakage detection method of the air conditioner in the embodiment of the present invention, when the air conditioner is turned on in the cooling mode or the dehumidification mode, after the compressor of the air conditioner is started, the indoor air temperature of the air conditioner, the indoor heat exchanger temperature , the outdoor ambient temperature, the discharge temperature of the compressor, and the continuous running time of the compressor after it is currently started to judge whether the refrigerant of the air conditioner leaks. Thus, it is possible to timely and accurately detect whether the refrigerant of the air conditioner leaks, so that corresponding measures can be taken in time when the refrigerant leaks, thereby ensuring the normal operation of the air conditioner and prolonging the service life of the compressor.

Corresponding to the foregoing embodiments, the present invention further proposes a non-transitory computer-readable storage medium.

The non-transitory computer-readable storage medium of the embodiment of the present invention stores a computer program, wherein when the program is executed by a processor, the method for detecting refrigerant leakage of an air conditioner proposed by the above-mentioned embodiments of the present invention can be realized.

According to the non-transitory computer-readable storage medium in the embodiment of the present invention, by executing the stored computer program, it is possible to timely and accurately detect whether the refrigerant of the air conditioner leaks, so that corresponding measures can be taken in time when the refrigerant leaks, thereby enabling Ensure the normal operation of the air conditioner and improve the service life of the compressor.

Corresponding to the above embodiments, the present invention also provides a refrigerant leakage detection device for an air conditioner.

As shown in FIG. 3 , the refrigerant leakage detection device for an air conditioner according to the embodiment of the present invention includes a monitoring module 10 , a temperature acquisition component 20 , a time acquisition module 30 and a main control module 40 .

Among them, the monitoring module 10 can be used to detect whether the compressor of the air conditioner is started when the air conditioner is turned on in cooling mode or dehumidification mode; the temperature acquisition component 20 can be used to acquire the indoor air temperature of the air conditioner, indoor Heat exchanger temperature, outdoor environment temperature and the discharge temperature of compressor; Time acquiring module 30 can be used for acquiring the continuous operation time after compressor is started currently; Main control module 40 can be used for according to indoor air inlet temperature, indoor heat exchanger temperature , outdoor ambient temperature, exhaust temperature and continuous running time to judge whether the refrigerant of the air conditioner leaks.

Specifically, the temperature acquisition component 20 may include an air inlet temperature sensor, a heat exchanger temperature sensor, an ambient temperature sensor, and an exhaust temperature sensor, and may respectively acquire the indoor air inlet temperature T1, Indoor heat exchanger temperature T2, outdoor ambient temperature T4 and compressor exhaust temperature T5. Specifically, the main control module 40 may determine whether the outdoor ambient temperature T4 obtained by the temperature obtaining component 20 is less than or equal to the first preset temperature x. When the main control module 40 judges that the outdoor ambient temperature T4 acquired by the temperature acquiring component 20 is less than or equal to the first preset temperature x, it can judge whether the refrigerant of the air conditioner is generated according to the outdoor ambient temperature T4 and the exhaust temperature T5 acquired by the temperature acquiring component 20. leakage; when the main control module 40 judges that the outdoor ambient temperature T4 acquired by the temperature acquisition component 20 is greater than the first preset temperature x, it can acquire The continuous running time t acquired by the module 30 determines whether the refrigerant of the air conditioner leaks. Wherein, the value of the first preset temperature x can be preset and stored so as to be recalled when judging whether the refrigerant of the air conditioner leaks. That is to say, when the outdoor ambient temperature of the air conditioner is low, the main control module 40 can judge whether the refrigerant in the air conditioner leaks according to the outdoor ambient temperature and the exhaust temperature acquired by the temperature acquisition component 20; When the temperature is high, the main control module 40 can judge whether the refrigerant in the air conditioner leaks according to the indoor air intake temperature obtained by the temperature obtaining module 20, the temperature of the indoor heat exchanger and the continuous running time obtained by the time obtaining module 30.

Specifically, when the main control module 40 judges that the outdoor ambient temperature T4 obtained by the temperature obtaining component 20 is less than or equal to the first preset temperature x, it can determine whether the exhaust gas temperature T5 obtained by the temperature obtaining component 20 is greater than or equal to the temperature obtained by a preset multiple. The sum of the outdoor ambient temperature b*T4 acquired by the component 20 and the second preset temperature a can determine whether the exhaust gas temperature T5 acquired by the temperature acquiring component 20 is greater than or equal to a+b*T4. When the main control module 40 judges that the exhaust gas temperature T5 obtained by the temperature obtaining component 20 is greater than or equal to the sum of the outdoor ambient temperature b*T4 obtained by the temperature obtaining component 20 and the second preset temperature a, that is, T5≥a+ b*T4, it can be judged that the refrigerant of the air conditioner is leaking; the main control module 40 can determine that the exhaust gas temperature T5 obtained by the temperature obtaining component 20 is less than the preset multiple, and the outdoor ambient temperature b*T4 obtained by the temperature obtaining component 20 is compared with the second preset temperature b*T4. When the sum of the temperatures a is assumed, that is, T5<a+b*T4, it can be judged that the refrigerant of the air conditioner has not leaked. Wherein, the values of the second preset temperature a and the preset multiple b can be preset and stored so as to be recalled when judging whether the refrigerant of the air conditioner leaks.

When the main control module 40 determines whether the outdoor ambient temperature T4 acquired by the temperature acquisition module 20 is greater than the first preset temperature x, it can determine whether the continuous running time t acquired by the time acquisition module 30 is greater than or equal to the first preset time. When the main control module 40 judges that the continuous running time t obtained by the time obtaining module 30 is greater than or equal to the first preset time, it can further determine whether the difference between the indoor air inlet temperature T1 obtained by the temperature obtaining module 20 and the indoor heat exchanger temperature T2 is less than equal to the first preset difference y. When the main control module 40 determines that the difference between the indoor air inlet temperature T1 acquired by the temperature acquisition component 20 and the indoor heat exchanger temperature T2 is less than or equal to the first preset difference y, it can determine that the refrigerant of the air conditioner is leaking; the main control module 40 When it is judged that the difference between the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 obtained by the temperature obtaining component 20 is greater than the first preset difference y, it can be judged that the refrigerant of the air conditioner has not leaked. Wherein, the value of the first preset time and the first preset difference y can be preset and stored so as to be recalled when judging whether the refrigerant of the air conditioner leaks.

Further, when the main control module 40 judges that the refrigerant of the air conditioner leaks, it can also accumulate the number of times that the refrigerant leaks to obtain the accumulated number of times N, and judge the accumulated number of times N, wherein, when the main control module 40 When the accumulated value N of judgment times is less than the preset number of times, the compressor can be controlled to stop for a second preset time; when the accumulated value N of judgment times of the main control module 40 is greater than the preset number of times, the air conditioner can be controlled to shut down and the air conditioner to issue a fault Prompt information. That is to say, when the refrigerant in the air conditioner starts to leak, the main control module 40 can control the compressor to stop, thereby reducing the discharge temperature of the compressor, and restart the compressor after waiting for a second preset time; When the refrigerant leaks frequently, the main control module 40 can control the air conditioner to shut down and report a fault. Wherein, the values of the preset number of times and the second preset time can be preset and stored so as to be recalled when making a judgment. The air conditioner can send out fault prompt information by displaying fault signs on the display screen or making abnormal sounds.

In a specific embodiment of the present invention, the main control module 40 can judge whether the outdoor ambient temperature T4 obtained by the temperature obtaining component 20 is less than or equal to 30°C. When the outdoor ambient temperature T4 is less than or equal to 30°C, the main control module 40 can judge whether the refrigerant of the air conditioner leaks according to the outdoor ambient temperature T4 and the exhaust temperature T5 acquired by the temperature acquisition component 20; when the outdoor ambient temperature T4 is greater than 30°C, The main control module 40 can judge whether the refrigerant of the air conditioner leaks according to the indoor air inlet temperature T1 obtained by the temperature obtaining module 20 , the indoor heat exchanger temperature T2 and the continuous running time t obtained by the time obtaining module 30 .

When the outdoor ambient temperature T4 is less than or equal to 30° C., the main control module 40 may further determine whether the exhaust gas temperature T5 is greater than or equal to 60+2.5*T4. If T5≥60+2.5*T4, the main control module 40 can judge that the refrigerant of the air conditioner leaks; if T5<60+2.5*T4, the main control module 40 can judge that the refrigerant of the air conditioner does not leak.

When the outdoor ambient temperature T4 is greater than 30° C., the main control module 40 may further determine whether the continuous running time t is greater than or equal to 5 minutes. When the continuous running time t is greater than or equal to 5 minutes, the main control module 40 can further determine whether the difference between the indoor inlet air temperature T1 and the indoor heat exchanger temperature T2 acquired by the temperature acquisition component 20 is less than or equal to 3°C. When the difference between the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 is less than or equal to 3°C, the main control module 40 can further determine that the refrigerant of the air conditioner leaks; when the indoor air inlet temperature T1 and the indoor heat exchanger temperature T2 When the difference is greater than 3°C, the main control module 40 can further determine that the refrigerant of the air conditioner has not leaked.

When the refrigerant of the air conditioner leaks, the main control module 40 can also accumulate the number of times that the refrigerant leaks to obtain the cumulative value N, and judge the cumulative value N. When the cumulative value N is less than 3, the main control module The module 40 can control the compressor to stop for 3 minutes; when the accumulated number of times N is greater than or equal to 3, the main control module 40 can control the air conditioner to shut down, and control the air conditioner to send a fault prompt message. Wherein, the air conditioner can send fault prompt information by displaying a fault sign on the display screen or making an abnormal sound.

According to the refrigerant leakage detection device for an air conditioner in an embodiment of the present invention, when the air conditioner is turned on in cooling mode or dehumidification mode, after the monitoring module detects that the compressor of the air conditioner is started, the main control module can obtain the The air conditioner's indoor air intake temperature, indoor heat exchanger temperature, outdoor ambient temperature, and compressor discharge temperature, as well as the continuous running time of the compressor acquired by the time acquisition module, judge whether the refrigerant of the air conditioner leaks. Thus, it is possible to timely and accurately detect whether the refrigerant of the air conditioner leaks, so that corresponding measures can be taken in time when the refrigerant leaks, thereby ensuring the normal operation of the air conditioner and prolonging the service life of the compressor.

Corresponding to the above embodiments, the present invention also provides an air conditioner.

The air conditioner according to the embodiment of the present invention includes the refrigerant leakage detection device for the air conditioner proposed in the above embodiment of the present invention, and its specific implementation may refer to the above embodiment, and will not be repeated here to avoid redundancy.

The air conditioner according to the embodiment of the present invention can timely and accurately detect whether the refrigerant leaks, so that corresponding measures can be taken in time when the refrigerant leaks, so as to ensure its normal operation and improve the service life of the compressor.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (12)

1. A refrigerant leakage detection method of an air conditioner, comprising the following steps: When the air conditioner is turned on in cooling mode or dehumidification mode, it is detected whether the compressor of the air conditioner is started; After the compressor is started, obtain the indoor air intake temperature, indoor heat exchanger temperature, outdoor ambient temperature, and discharge temperature of the compressor of the air conditioner, and obtain the continuous operation of the compressor after the current startup time; According to the indoor air inlet temperature, the indoor heat exchanger temperature, the outdoor ambient temperature, the exhaust temperature and the continuous running time, it is judged whether the refrigerant of the air conditioner leaks. 2. The refrigerant leakage detection method of an air conditioner according to claim 1, characterized in that, according to the indoor air intake temperature, the indoor heat exchanger temperature, the outdoor ambient temperature, the exhaust temperature and the Judging whether the refrigerant of the air conditioner leaks according to the above continuous running time, including: judging whether the outdoor ambient temperature is less than or equal to a first preset temperature; If the outdoor ambient temperature is less than or equal to the first preset temperature, then judge whether the refrigerant of the air conditioner leaks according to the outdoor ambient temperature and the exhaust temperature; If the outdoor ambient temperature is greater than the first preset temperature, it is determined whether the refrigerant of the air conditioner leaks according to the indoor air intake temperature, the indoor heat exchanger temperature and the continuous running time. 3. The method for detecting refrigerant leakage of an air conditioner according to claim 2, wherein when the outdoor ambient temperature is less than or equal to the first preset temperature, wherein, Judging whether the exhaust gas temperature is greater than or equal to the sum of the outdoor ambient temperature and a second preset temperature that is a preset multiple; If the exhaust gas temperature is greater than or equal to the sum of the outdoor ambient temperature and the second preset temperature of a preset multiple, it is judged that the refrigerant of the air conditioner leaks; If the discharge temperature is lower than the sum of the outdoor ambient temperature and the second preset temperature which is a preset multiple, it is determined that no refrigerant leakage occurs in the air conditioner. 4. The method for detecting refrigerant leakage of an air conditioner according to claim 2, wherein when the outdoor ambient temperature is greater than the first preset temperature, wherein, judging whether the continuous running time is greater than or equal to a first preset time; If the continuous running time is greater than or equal to the first preset time, it is further judged whether the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is less than or equal to a first preset difference; If the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is less than or equal to the first preset difference, it is determined that the refrigerant of the air conditioner is leaking; If the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is greater than the first preset difference, it is determined that no refrigerant leakage occurs in the air conditioner. 5. The refrigerant leakage detection method of an air conditioner according to any one of claims 1-4, characterized in that, when it is judged that the refrigerant leakage of the air conditioner occurs, the number of refrigerant leakages is also accumulated to obtain The cumulative value of the number of times, and judge the cumulative value of the number of times, wherein, When the cumulative value of the number of times is less than the preset number of times, control the compressor to stop for a second preset time; When the accumulative value of the number of times is greater than or equal to the preset number of times, the air conditioner is controlled to shut down, and a fault prompt message is issued. 6. A non-transitory computer-readable storage medium, on which a computer program is stored, characterized in that, when the program is executed by a processor, the refrigerant leakage detection of the air conditioner as described in any one of claims 1-5 is realized method. 7. A refrigerant leakage detection device for an air conditioner, characterized in that it comprises: A monitoring module, the monitoring module is used to detect whether the compressor of the air conditioner is started when the air conditioner is turned on in cooling mode or dehumidification mode; a temperature acquisition component, the temperature acquisition component is used to acquire the indoor air intake temperature, indoor heat exchanger temperature, outdoor ambient temperature and the exhaust temperature of the compressor of the air conditioner after the compressor is started; A time acquisition module, the time acquisition module is used to acquire the continuous running time of the compressor after it is currently started; A main control module, the main control module is used to judge the air conditioner's performance according to the indoor air inlet temperature, the indoor heat exchanger temperature, the outdoor ambient temperature, the exhaust temperature and the continuous running time. Whether there is leakage of refrigerant. 8. The refrigerant leakage detection device for an air conditioner according to claim 7, wherein the main control module is used to judge whether the outdoor ambient temperature is less than or equal to a first preset temperature, and the outdoor ambient temperature When the temperature is less than or equal to the first preset temperature, judge whether the refrigerant of the air conditioner leaks according to the outdoor ambient temperature and the exhaust temperature, and when the outdoor ambient temperature is greater than the first preset temperature and judging whether the refrigerant of the air conditioner leaks according to the indoor air inlet temperature, the indoor heat exchanger temperature and the continuous running time. 9 . The refrigerant leakage detection device for an air conditioner according to claim 8 , wherein the main control module is configured to determine whether the exhaust gas is discharged when the outdoor ambient temperature is less than or equal to the first preset temperature. Whether the temperature is greater than or equal to the sum of the outdoor ambient temperature and the second preset temperature of a preset multiple, and when the exhaust gas temperature is greater than or equal to the sum of the outdoor ambient temperature and the second preset temperature of a preset multiple, It is judged that the refrigerant of the air conditioner leaks, and when the discharge temperature is lower than the sum of the outdoor ambient temperature and a second preset temperature which is a preset multiple, it is judged that the refrigerant of the air conditioner does not leak. 10. The refrigerant leakage detection device for an air conditioner according to claim 8, wherein the main control module is configured to determine the continuous running time when the outdoor ambient temperature is greater than the first preset temperature Whether it is greater than or equal to the first preset time, and when the continuous operation time is greater than or equal to the first preset time, it is further judged whether the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is less than or equal to the first preset difference, and when the difference between the indoor air inlet temperature and the indoor heat exchanger temperature is less than or equal to the first preset difference, it is judged that the refrigerant of the air conditioner leaks, and the indoor When the difference between the inlet air temperature and the temperature of the indoor heat exchanger is greater than the first preset difference, it is determined that the refrigerant of the air conditioner does not leak. 11. The refrigerant leakage detection device of an air conditioner according to any one of claims 7-10, characterized in that, when the main control module judges that the refrigerant leakage of the air conditioner occurs, it also detects the leakage of the refrigerant. The number of times is accumulated to obtain the accumulated value of the number of times, and the accumulated value of the number of times is judged, wherein, When the cumulative value of the number of times is less than the preset number of times, the main control module controls the compressor to stop for a second preset time; When the accumulative value of the number of times is greater than or equal to the preset number of times, the main control module controls the air conditioner to shut down, and controls the air conditioner to send a fault prompt message. 12. An air conditioner, characterized by comprising the refrigerant leakage detection device for an air conditioner according to any one of claims 7-11.