A refrigerant leakage detection method and device for an air conditioner, an air conditioner, and a medium

Abstract

The application provides a refrigerant leakage detection method and device of an air conditioner, the air conditioner and a medium, and the refrigerant leakage detection method comprises the following steps: obtaining an operation mode of the air conditioner after the air conditioner is powered on; obtaining first indoor unit parameters within a first set time length, and determining whether the air conditioner has a refrigerant concentration increase condition according to the first indoor unit parameters; controlling the air conditioner to perform a first action when it is determined that the air conditioner has the refrigerant concentration increase condition; obtaining third indoor unit parameters within a third set time length in the future, and confirming whether the air conditioner has refrigerant leakage according to the third indoor unit parameters, the first indoor unit parameters and the operation mode; and controlling the air conditioner to perform a third action to reduce the refrigerant concentration in the air when it is confirmed that the air conditioner has refrigerant leakage. The application solves the technical problems in the prior art that the refrigerant concentration detection is affected by factors such as sensor position and environment, has low detection precision and has false detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a refrigerant leakage detection method of an air conditioner, a refrigerant leakage detection device of an air conditioner, an air conditioner and a readable storage medium. BACKGROUND

[0002] With the upgrading of environmental protection regulations on refrigerant requirements of refrigeration equipment, air conditioning products are gradually on the agenda with refrigerant leakage detection function, so that the user can be timely detected, identified and warned after the refrigerant leakage of the air conditioning equipment.

[0003] The existing technology about refrigerant leakage detection and the technical and discussion patents and other documents begin to increase, and the related products with refrigerant detection sensor have not been popularized, and the general detection method is that the sensor returns an alarm signal to the main control when the refrigerant concentration exceeds the threshold, and the main control controls the load to perform the refrigerant dispersion and dilution operation (turns off the compressor, increases the wind speed of the indoor fan, etc.). In the use process, there is a false detection situation that the refrigerant leakage is complete, but the sensor has not detected that the refrigerant concentration exceeds the threshold and has not triggered the protection.

[0004] However, in the actual application process, there is a problem that the refrigerant concentration detection in the prior art is affected by the sensor position, the environment and other factors, and the refrigerant concentration detection accuracy is low, and there is a false detection problem. SUMMARY

[0005] The present application solves the technical problems of low refrigerant concentration detection accuracy and false detection in the prior art due to the influence of sensor position, environment and other factors.

[0006] To solve the above problems, the present application provides a refrigerant leakage detection method of an air conditioner, comprising: obtaining the running mode of the air conditioner after the air conditioner is powered on; obtaining the first indoor unit parameter within the first set time, and determining whether the air conditioner has a refrigerant concentration increase according to the first indoor unit parameter; controlling the air conditioner to perform a first action in the case that the air conditioner has a refrigerant concentration increase; obtaining the third indoor unit parameter within the future third set time, and determining whether the air conditioner has a refrigerant leakage according to the third indoor unit parameter, the first indoor unit parameter and the running mode; controlling the air conditioner to perform a third action to reduce the refrigerant concentration in the air in the case that the air conditioner has a refrigerant leakage; wherein the running mode includes: a refrigeration mode, a heating mode, a blowing mode and a standby mode; the first action includes: controlling the air conditioner air deflector to close; the first indoor unit parameter is the value of the indoor unit parameter within the first set time, and the third indoor unit parameter is the value of the indoor unit parameter within the third set time; the indoor unit parameter includes: the indoor unit side pipe temperature, the indoor unit side ring temperature and the indoor unit refrigerant concentration.

[0007] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: firstly, it is judged whether the refrigerant concentration of the air conditioner increases, after confirming that the refrigerant concentration increases, the air conditioner is controlled to perform the first action, the air conditioner forms a closed space, and the air inside the air conditioner is mixed, so as to improve the accuracy of subsequent detection of the refrigerant concentration of the indoor unit; the refrigerant leakage can be found in time, and the safety hidden trouble of the environment is eliminated. After the air conditioner is controlled to perform the first action, the indoor unit parameters in a future time period are obtained, and the operation mode of the air conditioner before the first action and the indoor unit parameters before the first action are combined to judge whether the air conditioner leaks refrigerant; the accuracy of refrigerant concentration detection is improved through algorithm innovation on the existing device of the air conditioner, and false detection of the air conditioner can be avoided. In the case where it is confirmed that the air conditioner leaks refrigerant, the air conditioner is controlled to perform the third action to reduce the refrigerant concentration in the air, so as to find the refrigerant leakage in time, eliminate the safety hidden trouble of the environment, and improve the use safety of the air conditioner.

[0008] In an example of the present application, the third indoor unit parameters in a future third set time are obtained, and whether the air conditioner leaks refrigerant is confirmed according to the third indoor unit parameters, the first indoor unit parameters and the operation mode, including: comparing the size of the third indoor unit refrigerant concentration in the third indoor unit parameters and the first refrigerant concentration threshold; when the third indoor unit refrigerant concentration is greater than or equal to the first refrigerant concentration threshold, it is confirmed that the air conditioner leaks refrigerant; and / or when the third indoor unit refrigerant concentration is less than the first refrigerant concentration threshold, whether the air conditioner leaks refrigerant is confirmed according to the third indoor unit parameters, the first indoor unit parameters and the operation mode.

[0009] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: when the third indoor unit refrigerant concentration is greater than or equal to the first refrigerant concentration threshold, the air conditioner can be directly confirmed to leak refrigerant, without the need to judge through the first indoor unit parameters and the operation mode, so as to save the judgment time and shorten the overall detection time.

[0010] In an example of the present application, when the third indoor unit refrigerant concentration is less than the first refrigerant concentration threshold, whether the air conditioner has refrigerant leakage is determined according to the third indoor unit parameter, the first indoor unit parameter and the operating mode, including: in each operating mode, whether the third indoor unit parameter and the first indoor unit parameter meet the first parameter condition or the second parameter condition is determined respectively; when the third indoor unit parameter and the first indoor unit parameter meet the first parameter condition, it is determined that the air conditioner has refrigerant leakage; and / or when the third indoor unit parameter and the first indoor unit parameter meet the second parameter condition, the first indoor unit parameter in the first set time is repeatedly obtained, and whether the air conditioner has refrigerant concentration increase is determined according to the first indoor unit parameter; and / or when the third indoor unit parameter and the first indoor unit parameter do not meet the first parameter condition and the second parameter condition, the third indoor unit parameter in the future third set time is repeatedly obtained, and whether the air conditioner has refrigerant leakage is determined according to the third indoor unit parameter, the first indoor unit parameter and the operating mode.

[0011] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the first parameter condition and the second parameter condition are introduced, if the first parameter condition is met, it indicates that the indoor unit refrigerant concentration is gradually increasing, and it can be determined that the air conditioner has refrigerant leakage; if the second parameter condition is met, it indicates that it cannot be determined that the indoor unit refrigerant concentration is gradually increasing, and it cannot be determined that the air conditioner has refrigerant leakage, so it is necessary to continuously detect the first indoor unit parameter and determine whether the air conditioner has refrigerant concentration increase, thereby further improving the detection accuracy; if the first parameter condition and the second parameter condition are not met, it indicates that the indoor unit refrigerant concentration is gradually increasing, but it still cannot be determined that the air conditioner has refrigerant leakage, so it is necessary to continuously detect the third indoor unit parameter and determine whether the air conditioner has refrigerant leakage, thereby further improving the detection accuracy. At the same time, by combining the indoor unit side pipe temperature and the indoor unit side ring temperature collected in real time, the refrigerant leakage accuracy is further verified.

[0012] In an example of the present application, the first indoor unit parameter in the first set time is obtained, and whether the air conditioner has refrigerant concentration increase is determined according to the first indoor unit parameter, including: comparing the first indoor unit refrigerant concentration in the first indoor unit parameter with the second refrigerant concentration threshold, the third refrigerant concentration threshold and the fourth refrigerant concentration threshold; when the first indoor unit refrigerant concentration is greater than or equal to the third refrigerant concentration threshold and less than the fourth refrigerant concentration threshold, it is determined that the air conditioner has refrigerant concentration increase; and / or when the first indoor unit refrigerant concentration is greater than or equal to the fourth refrigerant concentration threshold, it is determined that the air conditioner has refrigerant leakage; and / or when the first indoor unit refrigerant concentration is greater than or equal to the second refrigerant concentration threshold and less than the third refrigerant concentration threshold, it is determined that the air conditioner does not have refrigerant concentration increase; wherein the second refrigerant concentration threshold < the third refrigerant concentration threshold < the fourth refrigerant concentration threshold.

[0013] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the second refrigerant concentration threshold value, the third refrigerant concentration threshold value and the fourth refrigerant concentration threshold value are set, so that it can be known that the first indoor unit refrigerant concentration is in which range, and the concentration threshold value provides a reference interval for the high and low of the first indoor unit refrigerant concentration.

[0014] In an example of the present application, after it is judged that the air conditioner does not exist the refrigerant concentration increasing condition when the first indoor unit refrigerant concentration is greater than or equal to the second refrigerant concentration threshold value and less than the third refrigerant concentration threshold value, the refrigerant leakage detection method further comprises: obtaining a second indoor unit parameter in a future second set time length; comparing the size of the second indoor unit refrigerant concentration and the first indoor unit refrigerant concentration in the second indoor unit parameter; when the second indoor unit refrigerant concentration is greater than the first indoor unit refrigerant concentration, judging that the air conditioner exists the refrigerant concentration increasing condition; and / or when the second indoor unit refrigerant concentration is less than or equal to the first indoor unit refrigerant concentration, repeatedly executing the obtaining of the first indoor unit parameter in the first set time length, and judging whether the air conditioner exists the refrigerant concentration increasing condition according to the first indoor unit parameter; wherein the second indoor unit parameter is a value of the indoor unit parameter in the second set time length.

[0015] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: according to the size of the second indoor unit refrigerant concentration and the first indoor unit refrigerant concentration, the air conditioner is preliminarily judged whether it exists the refrigerant concentration increasing condition; when the second indoor unit refrigerant concentration is greater than the first indoor unit refrigerant concentration, it is determined that the air conditioner exists the refrigerant concentration increasing condition at this time; and when the second indoor unit refrigerant concentration is less than or equal to the first indoor unit refrigerant concentration, it is determined that the air conditioner does not exist the refrigerant concentration increasing condition at this time, so that the first indoor unit parameter is continuously detected, thereby improving the detection accuracy.

[0016] In an example of the present application, the obtaining of the first indoor unit parameter in the first set time length and the judging of whether the air conditioner exists the refrigerant concentration increasing condition according to the first indoor unit parameter further comprises: continuously obtaining n indoor unit parameters in the first set time length; screening out a parameter maximum value and a parameter minimum value in the n indoor unit parameters; calculating an average value of the remaining n-2 indoor unit parameters except the parameter maximum value and the parameter minimum value, thereby obtaining the first indoor unit parameter.

[0017] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the detection accuracy of the first indoor unit parameter is improved.

[0018] In an example of the present application, in the case of confirming that the air conditioner has refrigerant leakage, after the air conditioner is controlled to perform the third action to reduce the concentration of refrigerant in the air, the refrigerant leakage detection method further comprises: obtaining a fourth indoor unit parameter within a fourth set time period and a fifth indoor unit parameter within a fifth set time period; determining whether the air conditioner meets the first shutdown condition according to the fourth indoor unit parameter and the fifth indoor unit parameter; when the air conditioner meets the first shutdown condition, controlling the air conditioner to turn off the indoor fan; and / or when the air conditioner does not meet the first shutdown condition, repeating the process of controlling the air conditioner to perform the third action to reduce the concentration of refrigerant in the air in the case of confirming that the air conditioner has refrigerant leakage; wherein the fourth indoor unit parameter is the value of the indoor unit parameter within the fourth set time period, and the fifth indoor unit parameter is the value of the indoor unit parameter within the fifth set time period.

[0019] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the fourth indoor unit parameter and the fifth indoor unit parameter are used to determine whether the refrigerant in the environment where the air conditioner is located has been reduced to a reasonable range; when the refrigerant in the environment where the air conditioner is located has been reduced to a reasonable range, the main control CPU can control the indoor fan to be turned off and the air conditioner to be shut down, thereby completing all steps of the refrigerant leakage detection method.

[0020] On the other hand, the present application also provides a refrigerant leakage detection device for an air conditioner, comprising: a first obtaining module, the first obtaining module is used to obtain the running mode of the air conditioner after the air conditioner is powered on; a first determining module, the first determining module is used to obtain a first indoor unit parameter within a first set time period, and determine whether the air conditioner has a refrigerant concentration increase according to the first indoor unit parameter; a first executing module, the first executing module is used to control the air conditioner to perform a first action when it is determined that the air conditioner has a refrigerant concentration increase; a second determining module, the second determining module is used to obtain a third indoor unit parameter within a third set time period, and confirm whether the air conditioner has refrigerant leakage according to the third indoor unit parameter, the first indoor unit parameter and the running mode; a second executing module, the second executing module is used to control the air conditioner to perform a third action to reduce the concentration of refrigerant in the air in the case of confirming that the air conditioner has refrigerant leakage; wherein the running mode includes: a cooling mode, a heating mode, a blowing mode and a standby mode; the first action includes: controlling the air deflector to be closed; the first indoor unit parameter is the value of the indoor unit parameter within the first set time period, and the third indoor unit parameter is the value of the indoor unit parameter within the third set time period; the indoor unit parameter includes: the indoor unit side pipe temperature, the indoor unit side ring temperature and the indoor unit refrigerant concentration.

[0021] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the refrigerant leakage detection device of the air conditioner in the embodiment is used to implement the refrigerant leakage detection method of the air conditioner according to any one of the embodiments of the present application, and therefore has all the beneficial effects of the refrigerant leakage detection method of the air conditioner according to any one of the embodiments of the present application, which will not be repeated here.

[0022] In another aspect, the embodiment of the present application further provides an air conditioner, which comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the refrigerant leakage detection method of the air conditioner according to any one of the embodiments described above.

[0023] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the air conditioner in the embodiment is operated by the refrigerant leakage detection device of the air conditioner according to any one of the embodiments of the present application, and therefore has all the beneficial effects of the refrigerant leakage detection method of the air conditioner according to any one of the embodiments of the present application, which will not be repeated here.

[0024] In another aspect, the embodiment of the present application further provides a readable storage medium, and the program or instructions are stored in the readable storage medium and executable on the processor to implement the steps of the refrigerant leakage detection method of the air conditioner according to any one of the embodiments described above.

[0025] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the readable storage medium in the embodiment is used to store the refrigerant leakage detection method of the air conditioner according to any one of the embodiments of the present application, and therefore has all the beneficial effects of the refrigerant leakage detection method of the air conditioner according to any one of the embodiments of the present application, which will not be repeated here.

[0026] After the technical scheme of the present application is adopted, the following technical effects can be achieved:

[0027] (1) After confirming the increase of the refrigerant concentration, the air conditioner is controlled to perform the first action, so that the air conditioner forms a sealed space and mixes the air inside the air conditioner, thereby improving the accuracy of the subsequent detection of the refrigerant concentration of the indoor unit; the refrigerant leakage can be found in time, and the safety hidden trouble of the environment can be eliminated;

[0028] (2) After the air conditioner is controlled to perform the first action, the indoor unit parameters in a future time period are obtained, and the refrigerant leakage of the air conditioner is judged in combination with the operation mode of the air conditioner before the first action is performed and the indoor unit parameters before the first action is performed; the accuracy of the refrigerant concentration detection is improved through algorithm innovation on the existing device of the air conditioner, and the false detection of the air conditioner can be avoided;

[0029] (3) In the case of confirming that the air conditioner has refrigerant leakage, the air conditioner is controlled to perform a third action to reduce the concentration of refrigerant in the air, so as to facilitate timely discovery of refrigerant leakage and eliminate the safety hazard problem of the environment, and improve the use safety of the air conditioner;

[0030] (4) By combining the indoor unit side pipe temperature and the indoor unit side ring temperature collected in real time, the accuracy of refrigerant leakage is further verified. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A flowchart of a refrigerant leakage detection method of an air conditioner provided for the first embodiment of the present application is provided.

[0032] Figure 2 A detailed flowchart of a refrigerant leakage detection method of an air conditioner provided for the first embodiment of the present application is provided.

[0033] Figure 3 A structure schematic block diagram of a refrigerant leakage detection method of an air conditioner provided for the second embodiment of the present application is provided.

[0034] Figure 4 A composition block diagram of an air conditioner provided for the third embodiment of the present application is provided.

[0035] Figure 5 A structure schematic diagram of a readable storage medium provided for the fourth embodiment of the present application is provided.

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] 100 - refrigerant leakage detection device of air conditioner; 101 - first acquisition module; 102 - first judgment module; 103 - first execution module; 104 - second judgment module; 105 - second execution module; 200 - air conditioner; 210 - memory; 211 - computer program; 220 - processor; 300 - readable storage medium; 310 - computer executable instructions. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0039]

Embodiment One

[0040] Referring to Figure 1 , which is a flowchart of a refrigerant leakage detection method of an air conditioner provided for the first embodiment of the present application, combined with Figure 2The refrigerant leakage detection method comprises the following steps:

[0041] Step S100: After the air conditioner is powered on, the operation mode of the air conditioner is obtained.

[0042] Step S200: The first indoor unit parameter within a first set time period is obtained, and whether the air conditioner has a refrigerant concentration increase is determined according to the first indoor unit parameter.

[0043] Step S300: When it is determined that the air conditioner has a refrigerant concentration increase, the air conditioner is controlled to perform a first action.

[0044] Step S400: The third indoor unit parameter within a third set time period in the future is obtained, and whether the air conditioner has a refrigerant leakage is confirmed according to the third indoor unit parameter, the first indoor unit parameter, and the operation mode.

[0045] Step S500: When it is confirmed that the air conditioner has a refrigerant leakage, the air conditioner is controlled to perform a third action to reduce the refrigerant concentration in the air.

[0046] The operation mode includes a cooling mode, a heating mode, a blowing mode, and a standby mode. The first action includes controlling the air deflector of the air conditioner to be closed. The first indoor unit parameter is the value of the indoor unit parameter within the first set time period, and the third indoor unit parameter is the value of the indoor unit parameter within the third set time period. The indoor unit parameter includes the indoor unit side pipe temperature, the indoor unit side ring temperature, and the indoor unit refrigerant concentration.

[0047] In one specific embodiment, the principle of the refrigerant leakage detection method of the present application is as follows: first, the first indoor unit parameter is obtained, and whether the air conditioner has a refrigerant concentration increase is determined according to the first indoor unit refrigerant concentration in the first indoor unit parameter. After confirming the refrigerant concentration increase, the air conditioner is controlled to perform a first action to form a closed space for the air conditioner and mix the air inside the air conditioner, thereby improving the accuracy of subsequent detection of the indoor unit refrigerant concentration. This facilitates the timely discovery of refrigerant leakage and eliminates the safety hazard problem of the environment. After the air conditioner is controlled to perform the first action, the indoor unit parameter within a certain time period in the future is obtained, and whether the air conditioner has a refrigerant leakage is determined in combination with the operation mode of the air conditioner before the first action is performed and the indoor unit parameter before the first action is performed. The refrigerant concentration detection accuracy is improved through algorithm innovation on the existing device of the air conditioner, which can avoid false detection of the air conditioner.

[0048] The operation mode of the air conditioner can include any one of a cooling mode, a heating mode, a blowing mode and a standby mode; the air conditioner is installed with a refrigerant sensor, an inner pipe temperature sensor and an environment temperature sensor, the refrigerant sensor can detect the refrigerant concentration of the indoor unit of the environment where the air conditioner is located, the inner pipe temperature sensor can detect the temperature of the indoor unit side pipe of the air conditioner (that is, the indoor unit side pipe temperature), and the environment temperature sensor can detect the environment temperature of the indoor unit side of the air conditioner (that is, the indoor unit side ring temperature).

[0049] The specific implementation process is: after the air conditioner is powered on, the operation mode of the air conditioner is obtained; the refrigerant leakage preliminary detection is performed: the first indoor unit parameters in the time period of are continuously collected to obtain , and , according to the specific values of , whether the air conditioner has the refrigerant concentration increase condition can be judged. In the case that the air conditioner has the refrigerant concentration increase condition, the air conditioner is controlled to perform the first action, the first action includes controlling the air deflector to close to form a closed space, and the first action also includes controlling the inner fan to rotate at a silent wind speed to fully mix the gas inside the air conditioner, so as to improve the accuracy of the subsequent detection result of the refrigerant concentration of the indoor unit, wherein the inner fan rotating at the silent wind speed can be understood as the inner fan running at the lowest speed. After the air conditioner performs the first action, the third indoor unit parameters in the time period of are continuously collected to obtain , and , so as to ensure that the third indoor unit parameters are obtained under the condition that the gas inside the air conditioner is fully mixed, and the accuracy of the detection is further improved. According to the third indoor unit parameters, the first indoor unit parameters and the operation mode, whether the air conditioner has the refrigerant leakage is confirmed, so as to propose the refrigerant leakage software algorithm control method under different operation modes of the air conditioner, and the differential control is more in line with the application scene. In the case that the air conditioner has the refrigerant leakage, the air conditioner is controlled to perform the third action to reduce the refrigerant concentration in the air, so as to facilitate the timely discovery of the refrigerant leakage, eliminate the safety hidden trouble problem of the environment, and improve the use safety of the air conditioner.

[0050] The third execution action includes that the master sends an alarm information. At the same time, the state of the compressor is confirmed to ensure that the compressor is in a closed state; and the position of the air deflector is adjusted, and the inner fan runs at the maximum wind speed. The third execution action is executed to timely disperse the refrigerant when it is confirmed that the air conditioner has refrigerant leakage. The specific operation of adjusting the position of the air deflector can be that the air deflector is adjusted to the best angle and the inner fan wind volume is adjusted to the maximum angle (note: generally, the wind volume is the largest when the air deflector is 50°; however, there can be differences according to the structure of the air conditioner, so the position is not described). Therefore, the position of the air deflector will affect the wind volume of the inner fan, thereby affecting the refrigerant dispersion time. The position of the air deflector is not limited in the embodiment, and can be set according to the structure of the air conditioner.

[0051] wherein, is a first set time length, the first indoor unit parameters include , and , is a first indoor unit refrigerant concentration (that is, the indoor unit refrigerant concentration in the first set time length), is a first indoor unit side pipe temperature (that is, the indoor unit side pipe temperature in the first set time length), is a first indoor unit side ring temperature (that is, the indoor unit side ring temperature in the first set time length); in turn, the meanings of , , and can be deduced, thereby obtaining the meanings of , , and .

[0052] Further, the step S400 includes:

[0053] Step S410: comparing the third indoor unit refrigerant concentration in the third indoor unit parameters and the first refrigerant concentration threshold value;

[0054] Step S420: when the third indoor unit refrigerant concentration is greater than or equal to the first refrigerant concentration threshold value, it is confirmed that the air conditioner has refrigerant leakage; and / or

[0055] Step S430: when the third indoor unit refrigerant concentration is less than the first refrigerant concentration threshold value, according to the third indoor unit parameters, the first indoor unit parameters and the operation mode, it is confirmed whether the air conditioner has refrigerant leakage.

[0056] ​​​​Specifically, when the third indoor unit refrigerant concentration is greater than or equal to the first refrigerant concentration threshold, it can be directly confirmed that the air conditioner has refrigerant leakage, without the need to judge through the first indoor unit parameters and the operation mode, thereby saving the judgment time and shortening the overall detection time; when the third indoor unit refrigerant concentration is less than the first refrigerant concentration threshold, it is necessary to confirm whether the air conditioner has refrigerant leakage through multiple parameters such as the third indoor unit parameters, the first indoor unit parameters and the operation mode.

[0057] Preferably, the first refrigerant concentration threshold can represent a pre-warning value of the indoor unit refrigerant concentration, and the preferred value of the first refrigerant concentration threshold is 15%.

[0058] Further, the step S430 comprises:

[0059] Step S431: In each operation mode, it is respectively judged whether the third indoor unit parameters and the first indoor unit parameters meet the first parameter condition or the second parameter condition.

[0060] Step S432: When the third indoor unit parameters and the first indoor unit parameters meet the first parameter condition, it is confirmed that the air conditioner has refrigerant leakage; and / or

[0061] Step S433: When the third indoor unit parameters and the first indoor unit parameters meet the second parameter condition, the first indoor unit parameters within the first set time period are repeatedly obtained, and it is judged according to the first indoor unit parameters whether the air conditioner has refrigerant concentration increase; and / or

[0062] Step S434: When the third indoor unit parameters and the first indoor unit parameters do not meet the first parameter condition and the second parameter condition, the third indoor unit parameters within the future third set time period are repeatedly obtained, and it is confirmed according to the third indoor unit parameters, the first indoor unit parameters and the operation mode whether the air conditioner has refrigerant leakage.

[0063] Specifically, the first parameter condition and the second parameter condition are introduced. If the first parameter condition is met, it means that the indoor unit refrigerant concentration is gradually increasing, and it can be confirmed that the air conditioner has refrigerant leakage. If the second parameter condition is met, it means that it cannot be judged that the indoor unit refrigerant concentration is gradually increasing, and it cannot be confirmed that the air conditioner has refrigerant leakage, so the step S200 needs to be executed repeatedly, which can continuously detect the first indoor unit parameters and judge whether the air conditioner has refrigerant concentration increase, thereby further improving the detection accuracy. If the first parameter condition and the second parameter condition are not met, it means that the indoor unit refrigerant concentration is gradually increasing, but it still cannot be confirmed that the air conditioner has refrigerant leakage, so the step S400 needs to be executed repeatedly, which can continuously detect the third indoor unit parameters and judge whether the air conditioner has refrigerant leakage, thereby further improving the detection accuracy. At the same time, by combining the indoor unit side pipe temperature and the indoor unit side ring temperature collected in real time, the refrigerant leakage accuracy is further verified.

[0064] In different operating modes, the specific first parameter condition or the second parameter condition is different, and a software algorithm control method for refrigerant leakage of the air conditioner in different operating modes is proposed, and differential control is more in line with the application scene.

[0065] Specifically, when the operating mode of the air conditioner before the first action is performed is the cooling mode, when , and , it can be confirmed that the air conditioner has refrigerant leakage, and at this time the first parameter condition is , and ; when , and , at this time the second parameter condition is , and , step S200 is executed; when both the first parameter condition and the second parameter condition are not met, step S400 is executed.

[0066] When the operating mode of the air conditioner before the first action is performed is the heating mode, when , and , it can be confirmed that the air conditioner has refrigerant leakage, and at this time the first parameter condition is , and ; when , and , at this time the second parameter condition is , and , step S200 is executed; when both the first parameter condition and the second parameter condition are not met, step S400 is executed.

[0067] When the operating mode of the air conditioner before the first action is performed is the air supply mode or the standby mode, when , it can be confirmed that the air conditioner has refrigerant leakage, and at this time the first parameter condition is ; when the first parameter condition is not met, step S400 is executed.

[0068] Further, step S200 includes:

[0069] Step S210: comparing the first indoor unit refrigerant concentration in the first indoor unit parameter with the second refrigerant concentration threshold, the third refrigerant concentration threshold, and the fourth refrigerant concentration threshold;

[0070] Step S211: When the first indoor unit refrigerant concentration is greater than or equal to the third refrigerant concentration threshold value and less than the fourth refrigerant concentration threshold value, it is determined that the air conditioner has a refrigerant concentration increase; and / or

[0071] Step S212: When the first indoor unit refrigerant concentration is greater than or equal to the fourth refrigerant concentration threshold value, it is determined that the air conditioner has a refrigerant leak; and / or

[0072] Step S213: When the first indoor unit refrigerant concentration is greater than or equal to the second refrigerant concentration threshold value and less than the third refrigerant concentration threshold value, it is determined that the air conditioner does not have a refrigerant concentration increase.

[0073] Wherein, the second refrigerant concentration threshold value < the third refrigerant concentration threshold value < the fourth refrigerant concentration threshold value.

[0074] Specifically, by setting the second refrigerant concentration threshold value, the third refrigerant concentration threshold value, and the fourth refrigerant concentration threshold value, the range of the first indoor unit refrigerant concentration can be accurately determined, and a reference interval for the high and low of the first indoor unit refrigerant concentration can be provided.

[0075] When the first indoor unit refrigerant concentration is in the second concentration interval, it is determined that the air conditioner has a refrigerant concentration increase, wherein the second concentration interval is that the first indoor unit refrigerant concentration is greater than or equal to the third refrigerant concentration threshold value and less than the fourth refrigerant concentration threshold value; when the first indoor unit refrigerant concentration is in the third concentration interval, it can be directly determined that the air conditioner has a refrigerant leak, without going through steps S300-S400, thereby saving judgment time and shortening the overall detection time, wherein the third concentration interval is that the first indoor unit refrigerant concentration is greater than or equal to the fourth refrigerant concentration threshold value; when the first indoor unit refrigerant concentration is in the first concentration interval, it is determined that the air conditioner does not have a refrigerant concentration increase, wherein the first concentration interval is that the first indoor unit refrigerant concentration is greater than or equal to the second refrigerant concentration threshold value and less than the third refrigerant concentration threshold value.

[0076] Preferably, the preferred value of the second refrigerant concentration threshold value is 0, the preferred value of the third refrigerant concentration threshold value is 5%, and the preferred value of the fourth refrigerant concentration threshold value is 15%.

[0077] Further, after step S213, the refrigerant leak detection method further comprises:

[0078] Obtaining a second indoor unit parameter within a second set time in the future;

[0079] Comparing the second indoor unit refrigerant concentration in the second indoor unit parameter and the first indoor unit refrigerant concentration;

[0080] When the second indoor unit refrigerant concentration is greater than the first indoor unit refrigerant concentration, it is determined that the air conditioner has a refrigerant concentration increase; and / or

[0081] When the refrigerant concentration of the second indoor unit is less than or equal to the refrigerant concentration of the first indoor unit, the process of obtaining the parameters of the first indoor unit within the first set time period is repeated, and the air conditioner is judged to have an increase in refrigerant concentration based on the parameters of the first indoor unit.

[0082] The second indoor unit parameter refers to the value of the indoor unit parameter within the second set time period.

[0083] Specifically, when the refrigerant concentration in the first indoor unit is within the first concentration range, the refrigerant leak detection method also includes: continuous sampling. The second indoor unit parameters within the time period are obtained , and ,according to and The magnitude of the value can be used to make a preliminary judgment on whether there is an increase in refrigerant concentration in the air conditioner; when At that time, it was determined that there was an increase in refrigerant concentration in the air conditioner, and then... , and Assign to , and So that step S400 can be executed with the latest parameters of the first indoor unit; when If it is determined that there is no increase in refrigerant concentration in the air conditioner, then step S200 is executed repeatedly to continuously detect the parameters of the first indoor unit, thereby improving the accuracy of the detection.

[0084] Furthermore, step S200 also includes:

[0085] Within a first set time period, continuously acquire n indoor unit parameters;

[0086] Filter out the maximum and minimum values ​​of n indoor unit parameters;

[0087] Calculate the average value of the remaining n-2 indoor unit parameters, excluding the maximum and minimum values, to obtain the first indoor unit parameter.

[0088] Specifically, continuous data collection Within a given time period, the system calculates the refrigerant concentration, pipe temperature, and ambient temperature of n indoor units. The refrigerant concentration values ​​are processed, and the maximum and minimum values ​​are removed. The average of the remaining n-2 indoor unit refrigerant concentrations is calculated to obtain the first indoor unit refrigerant concentration, thus improving the accuracy of the first indoor unit refrigerant concentration detection. Similarly, the pipe temperature and ambient temperature values ​​of the n indoor units are processed to obtain the first indoor unit pipe temperature and ambient temperature.

[0089] Preferably, the steps of acquiring the second indoor unit parameter within the second set time length, acquiring the third indoor unit parameter within the third set time length, and acquiring the first indoor unit parameter within the first set time length are consistent, thereby improving the accuracy of detection and further reducing the error of detection.

[0090] Preferably, the first set time length < the second set time length < the third set time length, the first set time length is set for preliminary judgment of refrigerant leakage and refrigerant concentration, the second set time length is set for rechecking whether it is a false detection, and the third set time length is set for comparison; different collection time lengths are determined according to different situations: if refrigerant leaks, the controller immediately determines whether the refrigerant concentration reaches the threshold value, which needs to be fed back in time, so the first set time length is relatively short; the second set time length is for judging whether a false detection phenomenon occurs, the time can be self-defined, but it needs to be judged whether a false detection phenomenon occurs, so the collection time cannot be too short; the third set time length is the same. The preferred value of the first set time length is 1s, the preferred value of the second set time length is 3s, and the preferred value of the third set time length is 5s.

[0091] Further, after step S500, the refrigerant leakage detection method further comprises:

[0092] Step S600: acquiring a fourth indoor unit parameter within a fourth set time length and a fifth indoor unit parameter within a fifth set time length;

[0093] Step S700: determining whether the air conditioner satisfies a first shutdown condition according to the fourth indoor unit parameter and the fifth indoor unit parameter;

[0094] Step S710: when the air conditioner satisfies the first shutdown condition, controlling the air conditioner to turn off the indoor fan; and / or

[0095] Step S720: when the air conditioner does not satisfy the first shutdown condition, repeatedly executing the step of controlling the air conditioner to perform a third action to reduce the refrigerant concentration in the air in the case that the air conditioner is determined to have refrigerant leakage;

[0096] Wherein, the fourth indoor unit parameter is a value of the indoor unit parameter within the fourth set time length, and the fifth indoor unit parameter is a value of the indoor unit parameter within the fifth set time length.

[0097] Specifically, after step S500, the fourth indoor unit parameter is continuously collected within time to obtain , and , and the fifth indoor unit parameter is continuously collected within time to obtain , and , according to which 、 、 and , determine whether the refrigerant in the environment where the air conditioner is located is reduced to a reasonable range; when , and , it is determined that the refrigerant in the environment where the air conditioner is located has been reduced to a reasonable range, so the main CPU can control the indoor fan to be turned off and the air conditioner to be turned off, thereby completing all steps of the refrigerant leakage detection method; otherwise, step S500 needs to be repeated. The first shutdown condition is: , and .

[0098] Preferably, the value of A can be set according to actual conditions, and the preferred value of A is 5℃.

[0099] Preferably, the fourth set duration / fifth set duration ≥ third set duration.

[0100]

Embodiment Two

[0101] Referring to Figure 3 , the embodiment also provides a refrigerant leakage detection device 100 of an air conditioner, comprising: a first acquisition module 101, a first judgment module 102, a first execution module 103, a second judgment module 104, and a second execution module 105. The first acquisition module 101 is configured to acquire the operating mode of the air conditioner after the air conditioner is powered on. The first judgment module 102 is configured to acquire the first indoor unit parameter within the first set duration, and determine whether the air conditioner has a refrigerant concentration increase according to the first indoor unit parameter. The first execution module 103 is configured to control the air conditioner to perform a first action when it is determined that the air conditioner has a refrigerant concentration increase. The second judgment module 104 is configured to acquire the third indoor unit parameter within the future third set duration, and confirm whether the air conditioner has a refrigerant leakage according to the third indoor unit parameter, the first indoor unit parameter, and the operating mode. The second execution module 105 is configured to control the air conditioner to perform a third action to reduce the refrigerant concentration in the air when it is confirmed that the air conditioner has a refrigerant leakage. The operating mode includes a cooling mode, a heating mode, a blowing mode, and a standby mode. The first action includes controlling the air conditioner air deflector to be closed. The first indoor unit parameter is the value of the indoor unit parameter within the first set duration, and the third indoor unit parameter is the value of the indoor unit parameter within the third set duration. The indoor unit parameter includes the indoor unit side pipe temperature, the indoor unit side ring temperature, and the indoor unit refrigerant concentration.

[0102] In one specific embodiment, the first acquisition module 101, the first judgment module 102, the first execution module 103, the second judgment module 104, and the second execution module 105 of the refrigerant leakage detection device 100 of the air conditioner cooperate to implement the refrigerant leakage detection method of the air conditioner as described in the first embodiment above, which will not be described here.

[0103] Embodiment Three

[0104] With reference to Figure 4 The embodiment provides a structural diagram of an air conditioner 200, the air conditioner 200 comprising a processor 220 and a memory 210 electrically connected to the processor 220, the memory 210 storing a computer program 211, and the processor 220 loading the computer program 211 to realize the refrigerant leakage detection method of the air conditioner according to the first embodiment.

[0105] Embodiment Four

[0106] With reference to Figure 5 The embodiment also provides a readable storage medium 300, the readable storage medium 300 storing computer executable instructions 310, and the computer executable instructions 310 being read and run by a processor to control an air conditioner where the readable storage medium 300 is located to implement the refrigerant leakage detection method of the air conditioner according to the first embodiment.

[0107] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented by other manners. The apparatus embodiments described above are only schematic, for example, each functional module in the embodiments of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0108] If the functions are realized in the form of software function modules and sold or used as independent products, the software function modules can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the embodiments of the present application. The aforementioned readable storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0109] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A refrigerant leakage detection method for an air conditioner, characterized by comprising: The refrigerant leakage detection method comprises: After the air conditioner is powered on, the operating mode of the air conditioner is obtained; First indoor unit parameters within a first set time period are obtained, and it is determined whether the air conditioner has a refrigerant concentration increase condition according to the first indoor unit parameters; When it is determined that the air conditioner has a refrigerant concentration increase condition, the air conditioner is controlled to perform a first action; Third indoor unit parameters within a future third set time period are obtained, and it is determined whether the air conditioner has a refrigerant leakage according to the third indoor unit parameters, the first indoor unit parameters, and the operating mode; When it is determined that the air conditioner has a refrigerant leakage, the air conditioner is controlled to perform a third action to reduce the refrigerant concentration in the air; The operating mode comprises a cooling mode, a heating mode, a blowing mode, and a standby mode; the first action comprises controlling the air deflector to be closed, and the first action further comprises controlling the indoor fan to rotate at a silent wind speed; the first indoor unit parameters are values of indoor unit parameters within the first set time period, and the third indoor unit parameters are values of indoor unit parameters within the third set time period; the indoor unit parameters comprise indoor unit side pipe temperature, indoor unit side ring temperature, and indoor unit refrigerant concentration; The first indoor unit parameters within the first set time period are obtained, and it is determined whether the air conditioner has a refrigerant concentration increase condition according to the first indoor unit parameters, which comprises: The first indoor unit refrigerant concentration in the first indoor unit parameters is compared with the second refrigerant concentration threshold value, the third refrigerant concentration threshold value, and the fourth refrigerant concentration threshold value; When the first indoor unit refrigerant concentration is greater than or equal to the second refrigerant concentration threshold value and less than the third refrigerant concentration threshold value, it is determined that the air conditioner does not have a refrigerant concentration increase condition; After the first indoor unit refrigerant concentration is greater than or equal to the second refrigerant concentration threshold value and less than the third refrigerant concentration threshold value, the refrigerant leakage detection method further comprises: Second indoor unit parameters within a future second set time period are obtained; The second indoor unit refrigerant concentration in the second indoor unit parameters is compared with the first indoor unit refrigerant concentration; When the second indoor unit refrigerant concentration is greater than the first indoor unit refrigerant concentration, it is determined that the air conditioner has a refrigerant concentration increase condition; and / or When the second indoor unit refrigerant concentration is less than or equal to the first indoor unit refrigerant concentration, the first indoor unit parameters within the first set time period are repeatedly obtained, and it is determined whether the air conditioner has a refrigerant concentration increase condition according to the first indoor unit parameters; The second indoor unit parameters are values of indoor unit parameters within the second set time period, and the first set time period < the second set time period < the third set time period.

2. The refrigerant leakage detection method according to claim 1, wherein The third indoor unit parameters within the future third set time period are obtained, and it is determined whether the air conditioner has a refrigerant leakage according to the third indoor unit parameters, the first indoor unit parameters, and the operating mode, which comprises: comparing the third indoor unit refrigerant concentration in the third indoor unit parameter with a first refrigerant concentration threshold value; when the third indoor unit refrigerant concentration is greater than or equal to the first refrigerant concentration threshold value, confirming that the air conditioner has refrigerant leakage; and / or when the third indoor unit refrigerant concentration is less than the first refrigerant concentration threshold value, according to the third indoor unit parameter, the first indoor unit parameter and the operation mode, confirming whether the air conditioner has refrigerant leakage.

3. The refrigerant leakage detection method of claim 2, wherein when the third indoor unit refrigerant concentration is less than the first refrigerant concentration threshold value, according to the third indoor unit parameter, the first indoor unit parameter and the operation mode, confirming whether the air conditioner has refrigerant leakage comprises: in each of the operation modes, respectively judging whether the third indoor unit parameter and the first indoor unit parameter satisfy a first parameter condition or a second parameter condition; when the third indoor unit parameter and the first indoor unit parameter satisfy the first parameter condition, confirming that the air conditioner has refrigerant leakage; and / or when the third indoor unit parameter and the first indoor unit parameter satisfy the second parameter condition, repeatedly performing the steps of obtaining the first indoor unit parameter within a first set time period, and judging whether the air conditioner has refrigerant concentration increase according to the first indoor unit parameter; and / or when the third indoor unit parameter and the first indoor unit parameter do not satisfy the first parameter condition and the second parameter condition, repeatedly performing the steps of obtaining the third indoor unit parameter within a future third set time period, and confirming whether the air conditioner has refrigerant leakage according to the third indoor unit parameter, the first indoor unit parameter and the operation mode.

4. The refrigerant leakage detection method of claim 1, wherein the steps of obtaining the first indoor unit parameter within a first set time period, and judging whether the air conditioner has refrigerant concentration increase according to the first indoor unit parameter comprises: When the operation mode of the air conditioner is the cooling mode before the first action is performed, the first parameter condition is , and , and the second parameter condition is , and ; When the operation mode of the air conditioner is the heating mode before the first action is performed, the first parameter condition is , and , and the second parameter condition is , and . When the operation mode of the air conditioner is the air supply mode or the standby mode before the first action is performed, the first parameter condition is ; wherein, is the first indoor unit refrigerant concentration, is the third indoor unit refrigerant concentration, is the first indoor unit side pipe temperature, is the third indoor unit side pipe temperature, is the first indoor unit side ring temperature, is the third indoor unit side ring temperature. comparing a first indoor unit refrigerant concentration in the first indoor unit parameter with a second refrigerant concentration threshold value, a third refrigerant concentration threshold value and a fourth refrigerant concentration threshold value; when the first indoor unit refrigerant concentration is greater than or equal to the third refrigerant concentration threshold value and less than the fourth refrigerant concentration threshold value, judging that the air conditioner has refrigerant concentration increase; and / or when the first indoor unit refrigerant concentration is greater than or equal to the fourth refrigerant concentration threshold value, confirming that the air conditioner has refrigerant leakage; wherein the second refrigerant concentration threshold value < the third refrigerant concentration threshold value < the fourth refrigerant concentration threshold value.

5. The refrigerant leakage detection method of claim 1, wherein the steps of obtaining the first indoor unit parameter within a first set time period, and judging whether the air conditioner has refrigerant concentration increase according to the first indoor unit parameter further comprises: within the first set time period, continuously obtaining n indoor unit parameters; screening out a parameter maximum value and a parameter minimum value from the n indoor unit parameters; ​ ​ ​ An average value of the remaining n-2 indoor unit parameters other than the parameter maximum value and the parameter minimum value is calculated, thereby obtaining the first indoor unit parameter.

6. The refrigerant leakage detection method according to claim 1, wherein, after the controlling the air conditioner to perform the third action to reduce the refrigerant concentration in the air in the case where it is confirmed that the air conditioner has refrigerant leakage, the refrigerant leakage detection method further comprises: obtaining a fourth indoor unit parameter within a fourth set time period in the future and a fifth indoor unit parameter within a fifth set time period in the future; determining whether the air conditioner satisfies a first shutdown condition according to the fourth indoor unit parameter and the fifth indoor unit parameter; controlling the air conditioner to turn off the indoor fan when the air conditioner satisfies the first shutdown condition; and / or repeating the controlling the air conditioner to perform the third action to reduce the refrigerant concentration in the air in the case where it is confirmed that the air conditioner has refrigerant leakage when the air conditioner does not satisfy the first shutdown condition; wherein the fourth indoor unit parameter is a value of an indoor unit parameter within the fourth set time period, and the fifth indoor unit parameter is a value of an indoor unit parameter within the fifth set time period; the refrigerant leakage detection device is configured to perform the refrigerant leakage detection method according to any one of claims 1-6, and the refrigerant leakage detection device comprises: The first shutdown condition is: , and , is the fourth indoor unit refrigerant concentration, is the fifth indoor unit refrigerant concentration, is the fourth indoor unit side pipe temperature, is the fourth indoor unit side ring temperature, and the value of A is 5℃.

7. A refrigerant leakage detection device for an air conditioner, characterized in that, a first obtaining module configured to obtain an operation mode of the air conditioner after the air conditioner is powered on; a first determining module configured to obtain a first indoor unit parameter within a first set time period, and determine whether the air conditioner has a refrigerant concentration increase according to the first indoor unit parameter; a first performing module configured to control the air conditioner to perform a first action when it is determined that the air conditioner has a refrigerant concentration increase; a second determining module configured to obtain a third indoor unit parameter within a third set time period in the future, and confirm whether the air conditioner has refrigerant leakage according to the third indoor unit parameter, the first indoor unit parameter, and the operation mode; a second performing module configured to control the air conditioner to perform a third action to reduce the refrigerant concentration in the air in the case where it is confirmed that the air conditioner has refrigerant leakage; wherein the operation mode comprises a cooling mode, a heating mode, a blowing mode, and a standby mode; the first action comprises controlling an air conditioner air deflector to be closed; the first indoor unit parameter is a value of an indoor unit parameter within the first set time period, and the third indoor unit parameter is a value of an indoor unit parameter within the third set time period; and the indoor unit parameter comprises an indoor unit side pipe temperature, an indoor unit side ring temperature, and an indoor unit refrigerant concentration. The air conditioner comprises a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the refrigerant leakage detection method according to any one of claims 1-6.

8. An air conditioner characterized by comprising: ​ 9. A readable storage medium, characterized by, The program or the instruction is stored on the readable storage medium, and when the program or the instruction is executed by the processor, the steps of the refrigerant leakage detection method according to any one of claims 1-6 are implemented.

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