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

Abstract

The application discloses a kind of refrigerant leakage detection method, device, air conditioner and storage medium.The application relates to air conditioner technical field, wherein, the method includes: if air conditioner is in standby state, whether it meets preset detection condition is detected according to the indoor environment temperature and indoor environment humidity obtained twice;If the preset detection condition is met, open the air deflector, and start the inner fan;The indoor environment humidity is obtained again and the indoor environment humidity obtained again is used as detection environment humidity, whether there is refrigerant leakage is detected according to the detection environment humidity and the indoor environment humidity obtained secondly.The application can effectively solve the problem whether indoor unit exists refrigerant leakage when air conditioner is in standby state, not only improve the use safety of user, and also because no need to increase redundant sensor, reduce detection cost.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more particularly to a refrigerant leakage detection method, device, air conditioner, and storage medium. Background Technology

[0002] During installation, air conditioning pipes are subject to vibration, bending, and drops, leading to stress concentration and the formation of undetectable cracks at joints, bends, or welds. Refrigerant leakage is a common quality problem in residential air conditioning systems. Furthermore, during use, electrochemical corrosion and corrosive substances can also cause refrigerant leaks within the system. Residential air conditioning systems use large amounts of flammable refrigerant to meet environmental requirements; refrigerant leaks can result in a flammable and explosive refrigerant-air mixture. However, for air conditioning systems, refrigerant leakage during standby is the most dangerous situation, significantly impacting user safety.

[0003] The related technology discloses a leak detection method using a refrigerant detection sensor. It utilizes refrigerant sensors such as semiconductor, infrared, or thermoelectric sensors to detect the refrigerant concentration in the air. While this detection method is accurate, it requires the pre-installation of a refrigerant detection sensor, resulting in high costs.

[0004] The related technology discloses a method for detecting refrigerant leakage using a pressure sensor, but ordinary household air conditioners do not have pressure sensors, and the application of this method also requires additional costs, making it unsuitable for large-scale ordinary household air conditioners. Summary of the Invention

[0005] This invention provides a refrigerant leakage detection method, device, air conditioner, and storage medium, aiming to solve the problem of whether there is refrigerant leakage in the indoor unit when the air conditioner is in standby mode, so as to improve the user's safety.

[0006] In a first aspect, embodiments of the present invention provide a refrigerant leakage detection method, comprising:

[0007] If the air conditioner is in standby mode, the indoor ambient temperature and humidity obtained twice will be used to check whether the preset detection conditions are met.

[0008] If the preset detection conditions are met, the air guide plate will be opened and the internal fan will be turned on.

[0009] The indoor ambient humidity is acquired again and used as the detection ambient humidity. Based on the detection ambient humidity and the second acquired indoor ambient humidity, the presence of refrigerant leakage is detected.

[0010] Secondly, embodiments of the present invention also provide a refrigerant leakage detection device, comprising:

[0011] The detection unit is used to detect whether the preset detection conditions are met based on two acquired indoor ambient temperature and indoor ambient humidity values ​​if the air conditioner is in standby mode.

[0012] An opening unit is used to open the air guide plate and turn on the internal fan if the preset detection conditions are met.

[0013] The leak detection unit is used to acquire the indoor ambient humidity again and use the acquired indoor ambient humidity as the detection ambient humidity, and to detect whether there is a refrigerant leak based on the detection ambient humidity and the second acquired indoor ambient humidity.

[0014] Thirdly, embodiments of the present invention also provide an air conditioner, the air conditioner including a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the above-described method.

[0015] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the above-described method.

[0016] This invention provides a refrigerant leak detection method, device, air conditioner, and storage medium. The method includes: if the air conditioner is in standby mode, checking whether preset detection conditions are met based on two acquired indoor ambient temperature and humidity readings; if the preset detection conditions are met, opening the air deflector and turning on the indoor fan; acquiring the indoor ambient humidity again and using this second acquired humidity as the detection humidity; and detecting whether refrigerant leakage exists based on the detection humidity and the second acquired indoor ambient humidity. This invention's technical solution, when the air conditioner is in standby mode, first checks whether preset detection conditions are met based on two acquired indoor ambient temperature and humidity readings; if met, opening the air deflector and turning on the indoor fan; then detecting whether refrigerant leakage exists based on the second acquired indoor ambient humidity reading. This not only improves user safety but also reduces detection costs by eliminating the need for additional sensors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1A schematic flowchart of a refrigerant leak detection method provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of a sub-process of a refrigerant leakage detection method provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of a sub-process of a refrigerant leakage detection method provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of a sub-process of a refrigerant leakage detection method provided in an embodiment of the present invention;

[0022] Figure 5 A flowchart illustrating a refrigerant leak detection method according to another embodiment of the present invention;

[0023] Figure 6 A simplified flowchart of a refrigerant leak detection method provided in an embodiment of the present invention;

[0024] Figure 7 A schematic block diagram of a refrigerant detection device provided in an embodiment of the present invention;

[0025] Figure 8 This is a schematic block diagram of an air conditioner provided in an embodiment of the present invention. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0028] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrases "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0031] Please see Figure 1 , Figure 1 This is a schematic flowchart of the refrigerant leak detection method provided in an embodiment of the present invention. The refrigerant leak detection method will be described in detail below. Figure 1 As shown, the method includes the following steps S110-S130.

[0032] S110. If the air conditioner is in standby mode, check whether the indoor ambient temperature and humidity obtained twice meet the preset detection conditions.

[0033] In embodiments of the present invention, such as Figure 2 As shown, step S110 specifically includes steps S111-S113: S111, taking the indoor ambient temperature and humidity obtained twice as the first indoor ambient temperature, first indoor ambient humidity, second indoor ambient temperature, and second indoor ambient humidity, respectively; S112, calculating the temperature difference between the first indoor ambient temperature and the second indoor ambient temperature; S113, detecting whether the preset detection conditions are met based on the temperature difference, the first indoor ambient temperature, the second indoor ambient temperature, the first indoor ambient humidity, and the second indoor ambient humidity. Specifically, if the air conditioner is in standby mode, the indoor ambient temperature and humidity are obtained twice using its built-in humidity sensor and ambient temperature sensor, and the first indoor ambient temperature and humidity obtained are recorded as the first indoor ambient temperature T. 内环1 The indoor ambient temperature and humidity obtained a second time are denoted as the second indoor ambient temperature T, and the first indoor ambient humidity is RH1. 内环2 Second indoor ambient humidity RH2; calculate T 内环1 and T 内环2 The difference is used to obtain the temperature difference ΔT 内环 That is, calculate ΔT 内环 =T 内环2-T 内环1 According to ΔT 内环 T 内环1 RH1, T 内环2 And whether RH2 detection meets the preset detection conditions. It should be noted that, in this embodiment, the ambient temperature sensor is usually placed at the air inlet of the air conditioner or on the side panel of the air conditioner (for indoor units with openings, the ambient temperature sensor can also be placed at the opening); the humidity sensor is usually placed in the panel area; the interval between the second acquisition of indoor ambient temperature and humidity and the first acquisition of indoor ambient temperature and humidity is 10 to 30 seconds. In other embodiments, the interval between the second acquisition of indoor ambient temperature and humidity and the first acquisition of indoor ambient temperature and humidity can also be set to other values.

[0034] It should also be noted that, in this embodiment, although the air guide plate is closed and the indoor fan is not turned on when the air conditioner is in standby mode, the air inside the indoor unit cavity can still be connected to the indoor air through the filter, allowing for air convection. Furthermore, since the indoor unit panel is not insulated, the air inside the indoor unit cavity and the indoor air can exchange heat effectively through the indoor unit panel. Therefore, changes in the indoor ambient temperature and humidity will cause changes in the temperature and humidity inside the indoor unit cavity, meaning that the temperature and humidity measured by the humidity sensor and the ambient temperature sensor are consistent with the indoor ambient temperature and humidity. When the indoor humidity is low, if the refrigerant leak is directly opposite the air inlet of the indoor unit, the refrigerant will be ejected. The rapid pressure drop near the leak will cause heat to be carried away from the interior of the indoor unit. While the absolute humidity of the air inside the indoor unit remains constant, the temperature decreases, resulting in a higher relative humidity. Here, absolute humidity refers to the moisture content per cubic meter of air, and relative humidity can be obtained by dividing the absolute humidity by the maximum absolute humidity at the current temperature. The indoor humidity read by the humidity sensor is the relative humidity. Conversely, when the indoor humidity is high, if the refrigerant leak is directly opposite the air inlet of the indoor unit, the rapid pressure drop near the leak will cause a sudden drop in temperature, condensing moisture in the air. This will cause the temperature inside the indoor unit to decrease, and the relative humidity will initially decrease. The refrigerant leaks from a small source and then increases in size. If the leak is not directly facing the air inlet of the indoor unit, the leaked refrigerant may remain inside the indoor unit cavity. Because the refrigerant has very low water content and is very dry, the rapidly expanding refrigerant will force the water-containing air out of the indoor unit cavity, causing a change in humidity and thus reducing the reading of the humidity sensor. In summary, regardless of whether the leak is facing the inside of the indoor unit cavity or directly sprayed out of the indoor unit, and regardless of whether the indoor humidity is high or low, when a refrigerant leak occurs, the reading of the humidity sensor will change due to changes in the indoor ambient temperature, the absolute moisture content of the indoor air, and the air composition inside the indoor unit cavity. Therefore, the presence of a refrigerant leak in the indoor unit can be determined by judging the changes in the readings of the ambient temperature sensor and the humidity sensor.

[0035] It should be further explained that in this embodiment, the relative humidity exhibits a trend of first decreasing and then increasing because when the humidity is high, the refrigerant is sprayed out, the temperature drops sharply, condensation occurs, moisture condenses, and the moisture content decreases. However, there is thermal lag; the internal temperature of the indoor unit cavity remains unchanged, the maximum moisture content remains unchanged, and the temperature decreases. As condensation continues to occur, moisture continues to condense, the partial pressure of water in the air continues to decrease, the dew point temperature continues to decrease, and condensation gradually decreases until the temperature at the leak point is higher than the dew point temperature. Condensation no longer occurs, and the absolute moisture content no longer decreases. However, at this point, as the internal temperature of the indoor unit cavity gradually decreases, the maximum moisture content gradually decreases, and the relative humidity increases.

[0036] Furthermore, such as Figure 3 As shown, step S113 specifically includes steps S1131-S1133: S1131, determining whether the temperature difference is a preset temperature difference; S1132, if the temperature difference is not the preset temperature difference, calculating the relative humidity based on the first indoor ambient temperature, the second indoor ambient temperature, and the first indoor ambient humidity; S1133, if the relative humidity is not equal to the second indoor ambient humidity, determining that the preset detection condition is met. Specifically, determining the temperature difference ΔT 内环 Is it the preset temperature difference ΔT? 预设 That is, to determine whether ΔT is satisfied. 内环 =ΔT 预设 If ΔT is not satisfied 内环 =ΔT 预设 Then, based on the first indoor ambient temperature T 内环1 The second indoor ambient temperature T 内环2 And the relative humidity RH(T) is calculated from the first indoor ambient humidity RH1. 内环2 If RH2 = RH(T) is not satisfied 内环2 If RH2 is the second indoor ambient humidity, then the preset detection condition is met; if RH2 = RH(T) is satisfied. 内环2 This indicates that the temperature and humidity inside the indoor unit cavity are the same as the indoor ambient temperature and humidity, thus determining that the indoor unit has not experienced refrigerant leakage. It should be noted that, in this embodiment of the invention, ΔT... 预设The value is 0. It should also be noted that, to avoid detection errors caused by turning on the heater, using other household appliances that can change the indoor ambient temperature, or opening windows, the indoor ambient temperature is first checked for changes. If no change in the indoor ambient temperature is detected, the humidity sensor reading is then checked for changes. If a change in the indoor ambient temperature is detected, the humidity sensor reading will inevitably change due to the change in the indoor ambient temperature. Therefore, by comparing the calculated relative humidity and the second indoor ambient humidity, it can be determined whether the preset detection conditions are met.

[0037] In another embodiment of the invention, such as Figure 3 As shown, the refrigerant leak detection method includes steps S1131-S1133, and after step S1133, it further includes steps S1134-S1135: S1134, if the temperature difference is the preset temperature difference, calculate the difference between the first indoor ambient humidity and the second indoor ambient humidity to obtain the humidity difference; S1135, if the humidity difference is not the preset humidity difference, then it is determined that the preset detection condition is met. Specifically, the temperature difference ΔT is determined. 内环 Is it the preset temperature difference ΔT? 预设 That is, to determine whether ΔT is satisfied. 内环 =ΔT 预设 If ΔT 内环 =ΔT 预设 Then, the difference between the first indoor ambient humidity RH1 and the second indoor ambient humidity RH2 is calculated to obtain the humidity difference ΔRH, that is, ΔRH = RH2 - RH1; if ΔRH is not the preset humidity difference ΔRH 预设 That is, ΔRH = ΔRH is not satisfied. 预设 If the preset detection conditions are met, then it is determined that ΔRH = ΔRH. 预设 If the indoor unit does not leak refrigerant, it is determined that no refrigerant leak has occurred. It should be noted that, in this embodiment of the invention, ΔRH... 预设 The value is 0. Understandably, in other embodiments, the ΔRH 预设 The value can be set according to actual needs.

[0038] S120. If the preset detection conditions are met, open the air guide plate and turn on the internal fan.

[0039] In this embodiment of the invention, if the preset detection condition is met, that is, if ΔRH=ΔRH is satisfied... 预设 Or it satisfies RH2 = RH(T) 内环2 ), where RH2 is the second indoor ambient humidity, then open the air guide plate, turn on the indoor fan, and after turning on the indoor fan, make the indoor fan run at low speed to introduce indoor air into the indoor unit cavity.

[0040] S130. Obtain the indoor ambient humidity again and use the newly obtained indoor ambient humidity as the detection ambient humidity. Detect whether there is a refrigerant leak based on the detection ambient humidity and the indoor ambient humidity obtained the second time.

[0041] In this embodiment of the invention, after indoor air is introduced into the indoor unit cavity, the indoor ambient humidity is acquired again and used as the detection ambient humidity. This is the third acquisition of the indoor ambient humidity RH3. Based on RH3 and RH2, it is detected whether there is refrigerant leakage in the indoor unit.

[0042] Furthermore, such as Figure 4 As shown, step S130 may specifically include steps S131-S133: S131, calculating the absolute value of the difference between the detected ambient humidity and the second indoor ambient humidity to obtain the absolute humidity difference; S132, if the absolute humidity difference is not greater than a preset absolute humidity difference, then it is determined that there is no refrigerant leak; S133, if the absolute humidity difference is greater than the preset absolute humidity difference, then it is determined that there is a refrigerant leak. Specifically, the absolute humidity difference ΔRH is obtained by calculating the absolute value of the difference between the detected ambient humidity RH3 and the second indoor ambient humidity RH2. 绝对 If ΔRH 绝对 Not greater than the preset absolute humidity difference ΔRH 预设绝对 That is, ΔRH is not satisfied. 绝对 >ΔRH 预设绝对 This indicates that the indoor humidity has not changed abruptly, thus determining that there is no refrigerant leak in the indoor unit; if ΔRH is satisfied... 绝对 >ΔRH 预设绝对 This indicates a sudden change in the indoor humidity, thus indicating a refrigerant leak in the indoor unit. It should be noted that, in this embodiment of the invention, ΔRH... 预设绝对 =5ΔRH 绝对 In other embodiments, ΔRH 预设绝对Other values ​​can also be set. It should also be noted that, in this embodiment of the invention, determining whether the indoor humidity has changed abruptly is to avoid detection errors caused by the use of household appliances that can change humidity indoors, such as humidifiers or dehumidifiers. If the change in the humidity sensor reading is due to the use of the household appliance, then since the indoor humidity distribution is continuous, the humidity sensor reading will remain unchanged when the indoor fan is turned on to introduce indoor air into the indoor unit cavity. It should be noted that the indoor humidity distribution is continuous because space is continuous, air is continuous, and the transfer of matter is continuous. For example, the temperature and humidity are different at points A and B. Point A reads 20°C and 80% relative humidity, while point B reads 30°C and 50% relative humidity. The change from 20°C to 30°C is continuous, as is the change from 80% to 50% relative humidity. If the change in the humidity sensor reading is due to refrigerant leakage, then when indoor air is introduced into the indoor unit cavity, the humidity sensor reading will quickly change to match the indoor humidity, resulting in a sudden change. It should also be noted that in this embodiment of the invention, refrigerant leakage refers to a leakage rate not lower than a preset standard rate. This invention does not apply to slow leakage rates below the preset standard rate, and if the refrigerant leaks at a slow rate below the preset standard rate, the harm to the living environment is negligible.

[0043] In yet another embodiment of the invention, as Figure 5As shown, the refrigerant leak detection method includes steps S110-S130, and after step S130, it further includes steps S140-S150: S140, if a refrigerant leak exists, the indoor fan is operated at a preset speed, and the expansion valve opening is adjusted to a preset opening; S150, if no refrigerant leak exists, the indoor fan and the air guide plate are turned off, and when the preset cycle detection time is reached, the process returns to the step of checking whether the preset detection conditions are met based on the indoor ambient temperature and indoor ambient humidity obtained twice if the air conditioner is in standby mode, until the preset stop condition is met. Specifically, if a refrigerant leak is detected in the indoor unit of the air conditioner, the indoor fan is operated at the highest speed to quickly disperse the accumulated refrigerant, eliminate the combustion cloud, and the expansion valve opening is adjusted to the lowest level to reduce the rate at which refrigerant leaks from the outdoor unit to the indoor unit. If no refrigerant leak is detected, the internal fan and the air guide vane are shut down. When the preset cycle detection time is reached, the process returns to step S110 until a preset stop condition is met, where the preset stop condition is shutdown or stoppage. It should be noted that in this embodiment, the preset speed is the maximum speed of the internal fan, and the preset opening degree is the minimum opening degree of the expansion valve. In other embodiments, the preset speed and preset opening degree are set according to actual needs.

[0044] Please see Figure 6 , Figure 6 This is a simplified flowchart of the refrigerant leak detection method provided in this embodiment of the invention. Figure 6 In the process, with the air conditioner in standby mode, the indoor ambient temperature and humidity are detected, wherein the indoor ambient temperature includes the first indoor ambient temperature T detected initially. 内环1 And the second detected indoor ambient temperature T 内环2 The indoor ambient humidity includes the first indoor ambient humidity RH1 detected for the first time and the second indoor ambient humidity RH2 detected for the second time; the temperature difference ΔT is determined. 内环 Is it the preset temperature difference ΔT? 预设 That is, to determine whether ΔT is satisfied. 内环 =ΔT 预设 If the conditions are not met, then calculate the relative humidity RH(T). 内环2 Determine whether RH2 = RH(T) is satisfied. 内环2 If the condition is met, it is determined that there is no refrigerant leak indoors; if not, the air guide plate is opened and the indoor fan is turned on. If ΔT is met... 内环 =ΔT 预设 Then determine whether the humidity difference ΔRH is the preset humidity difference ΔRH. 预设 That is, to determine whether ΔRH = ΔRH 预设If the conditions are met, it is determined that there is no refrigerant leakage in the indoor unit. If not, the air guide plate is opened and the indoor fan is turned on to introduce indoor air into the indoor unit cavity. After introducing indoor air into the indoor unit cavity, it is further determined whether the indoor ambient humidity RH3 has changed abruptly. If abrupt change occurs, the indoor fan is run at its highest speed to quickly disperse the accumulated refrigerant, eliminate the combustion cloud, and the expansion valve opening is adjusted to the lowest level to reduce the rate at which refrigerant leaks from the outdoor unit to the indoor unit. If no abrupt change occurs, the air guide plate is closed, the indoor fan is turned off, and it is determined that there is no refrigerant leakage in the indoor unit.

[0045] In summary, in this embodiment of the invention, the indoor unit of the air conditioner is detected for refrigerant leakage by using the built-in ambient temperature and humidity sensors to detect changes in indoor temperature and humidity while the air conditioner is in standby mode. Specifically, detecting changes in indoor temperature avoids detection errors caused by turning on heaters, using other household appliances that can change the indoor temperature, or opening windows. Detecting changes in indoor humidity avoids detection errors caused by using household appliances that can change humidity. This not only improves user safety but also reduces detection costs by eliminating the need for additional sensors.

[0046] Figure 7 This is a schematic block diagram of a refrigerant detection device 200 provided in an embodiment of the present invention. Figure 7 As shown, corresponding to the above refrigerant leak detection method, the present invention also provides a refrigerant detection device 200. This refrigerant detection device 200 includes components for performing the above-described refrigerant leak detection method, and the device can be configured in an air conditioner. Specifically, please refer to... Figure 7 The refrigerant detection device 200 includes a detection unit 201, an opening unit 202, and a leak detection unit 203.

[0047] The detection unit 201 is used to detect whether the preset detection conditions are met based on the indoor ambient temperature and humidity obtained twice if the air conditioner is in standby mode; the opening unit 202 is used to open the air guide plate and turn on the indoor fan if the preset detection conditions are met; the leakage detection unit 203 is used to obtain the indoor ambient humidity again and use the newly obtained indoor ambient humidity as the detection ambient humidity, and detect whether there is a refrigerant leak based on the detection ambient humidity and the second obtained indoor ambient humidity.

[0048] In some embodiments, such as this embodiment, the detection unit 201 includes a first calculation unit and a first detection subunit.

[0049] The unit is used to take the indoor ambient temperature and indoor ambient humidity obtained twice as the first indoor ambient temperature, the first indoor ambient humidity, the second indoor ambient temperature, and the second indoor ambient humidity, respectively; the first calculation unit is used to calculate the temperature difference between the first indoor ambient temperature and the second indoor ambient temperature; the first detection subunit is used to detect whether the preset detection conditions are met based on the temperature difference, the first indoor ambient temperature, the second indoor ambient temperature, the first indoor ambient humidity, and the second indoor ambient humidity.

[0050] In some embodiments, such as this embodiment, the first detection subunit includes a judgment unit, a second calculation unit, a first determination unit, a third calculation unit, and a second determination unit.

[0051] The first detection subunit is used to determine whether the temperature difference is a preset temperature difference; the second calculation unit is used to calculate the relative humidity based on the first indoor ambient temperature, the second indoor ambient temperature, and the first indoor ambient humidity if the temperature difference is not the preset temperature difference; the first determination unit is used to determine that the preset detection condition is met if the relative humidity is not equal to the second indoor ambient humidity; the third calculation unit is used to calculate the humidity difference by comparing the first indoor ambient humidity and the second indoor ambient humidity if the temperature difference is the preset temperature difference; the second determination unit is used to determine that the preset detection condition is met if the humidity difference is not the preset humidity difference.

[0052] In some embodiments, such as this one, the leakage detection unit 203 includes a third calculation unit, a third determination unit, and a fourth determination unit.

[0053] The third calculation unit is used to calculate the absolute value of the difference between the detected ambient humidity and the second indoor ambient humidity to obtain the absolute humidity difference; the third determination unit is used to determine that there is no refrigerant leak if the absolute humidity difference is not greater than the preset absolute humidity difference; the fourth determination unit is used to determine that there is a refrigerant leak if the absolute humidity difference is greater than the preset absolute humidity difference.

[0054] In some embodiments, such as this one, the refrigerant detection device 200 further includes an adjustment unit and a shutdown unit.

[0055] The regulating unit is used to operate the indoor fan at a preset speed and adjust the opening of the expansion valve to a preset degree if there is a refrigerant leak. The shut-off unit is used to shut off the indoor fan and the air guide plate if there is no refrigerant leak, and when the preset cycle detection time is reached, return to the step of detecting whether the preset detection conditions are met based on the indoor ambient temperature and indoor ambient humidity obtained twice if the air conditioner is in standby mode, until the preset stop condition is met.

[0056] The aforementioned refrigerant detection device can be implemented as a computer program, which can, for example... Figure 8 The air conditioner shown is running.

[0057] Please see Figure 8 , Figure 8 This is a schematic block diagram of an air conditioner provided in an embodiment of the present invention. The air conditioner 300 is a device with refrigerant leakage detection function.

[0058] See Figure 8 The air conditioner 300 includes a processor 302, a memory, and a network interface 305 connected via a system bus 301. The memory may include a non-volatile storage medium 303 and internal memory 304.

[0059] The non-volatile storage medium 303 may store an operating system 3031 and a computer program 3032. When the computer program 3032 is executed, it causes the processor 302 to perform a refrigerant leak detection method.

[0060] The processor 302 is used to provide computing and control capabilities to support the operation of the entire air conditioner 300.

[0061] The internal memory 304 provides an environment for the operation of the computer program 3032 in the non-volatile storage medium 303. When the computer program 3032 is executed by the processor 302, the processor 302 can execute a refrigerant leak detection method.

[0062] This network interface 305 is used for network communication with other devices. Those skilled in the art will understand that... Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the air conditioner 300 to which the present invention is applied. A specific air conditioner 300 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0063] The processor 302 is used to run a computer program 3032 stored in a memory to implement any embodiment of the above-described refrigerant leak detection method.

[0064] It should be understood that, in this embodiment of the invention, the processor 302 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0065] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program may be stored in a storage medium, which is a computer-readable storage medium. The computer program is executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0066] Therefore, the present invention also provides a storage medium. This storage medium can be a computer-readable storage medium. The storage medium stores a computer program. When executed by a processor, the computer program causes the processor to perform any embodiment of the refrigerant leak detection method described above.

[0067] The storage medium can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0068] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0069] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0070] The steps in the method of this invention can be adjusted, merged, or reduced in order according to actual needs. The units in the device of this invention can be merged, divided, or reduced according to actual needs. Furthermore, the functional units in the various embodiments of this invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0071] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause an air conditioner to execute all or part of the steps of the methods described in the various embodiments of the present invention.

[0072] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0073] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for detecting refrigerant leaks, characterized in that, include: If the air conditioner is in standby mode, the indoor ambient temperature and humidity obtained twice will be used to check whether the preset detection conditions are met. If the preset detection conditions are met, the air guide plate will be opened and the internal fan will be turned on. The indoor ambient humidity is acquired again and used as the detection ambient humidity. Based on the detection ambient humidity and the indoor ambient humidity acquired a second time, it is determined whether there is a refrigerant leak. The step of determining whether the indoor ambient temperature and humidity obtained from the two measurements meet the preset detection conditions includes: The indoor ambient temperature and indoor ambient humidity obtained in the two separate measurements are respectively referred to as the first indoor ambient temperature, the first indoor ambient humidity, the second indoor ambient temperature, and the second indoor ambient humidity; The temperature difference is obtained by calculating the difference between the first indoor ambient temperature and the second indoor ambient temperature; Determine whether the temperature difference is a preset temperature difference; If the temperature difference is not the preset temperature difference, then the relative humidity is calculated based on the first indoor ambient temperature, the second indoor ambient temperature, and the first indoor ambient humidity. If the relative humidity is not equal to the humidity of the second indoor environment, then the preset detection conditions are met. If the temperature difference is the preset temperature difference, the humidity difference is obtained by calculating the difference between the first indoor ambient humidity and the second indoor ambient humidity; If the humidity difference is not a preset humidity difference, then the step of determining that the preset detection conditions are met is executed; The step of detecting whether there is a refrigerant leak based on the detected ambient humidity and the second obtained indoor ambient humidity includes: The absolute humidity difference is obtained by calculating the absolute value of the difference between the humidity of the detected environment and the humidity of the second indoor environment; If the absolute humidity difference is not greater than the preset absolute humidity difference, it is determined that there is no refrigerant leak; If the absolute humidity difference is greater than the preset absolute humidity difference, it is determined that there is a refrigerant leak.

2. The method according to claim 1, characterized in that, After acquiring the indoor ambient humidity again and using the acquired indoor ambient humidity as the detection ambient humidity, and after detecting whether there is a refrigerant leak based on the detection ambient humidity and the second acquired indoor ambient humidity, the process further includes: If there is a refrigerant leak, the internal fan will be operated at a preset speed, and the expansion valve opening will be adjusted to a preset opening.

3. The method according to claim 1, characterized in that, After acquiring the indoor ambient humidity again and using the acquired indoor ambient humidity as the detection ambient humidity, and after detecting whether there is a refrigerant leak based on the detection ambient humidity and the second acquired indoor ambient humidity, the process further includes: If there is no refrigerant leak, the indoor fan and the air guide plate are turned off. When the preset cycle detection time is reached, the process returns to the step of checking whether the preset detection conditions are met based on the indoor ambient temperature and indoor ambient humidity obtained twice if the air conditioner is in standby mode, until the preset stop condition is met.

4. A refrigerant leak detection device, applied to the refrigerant leak detection method according to any one of claims 1-3, characterized in that, include: The detection unit is used to detect whether the preset detection conditions are met based on two acquired indoor ambient temperature and indoor ambient humidity values ​​if the air conditioner is in standby mode. An opening unit is used to open the air guide plate and turn on the internal fan if the preset detection conditions are met. The leak detection unit is used to acquire the indoor ambient humidity again and use the acquired indoor ambient humidity as the detection ambient humidity, and to detect whether there is a refrigerant leak based on the detection ambient humidity and the second acquired indoor ambient humidity.

5. An air conditioner, characterized in that, The air conditioner includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method as described in any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The storage medium stores a computer program that, when executed by a processor, can implement the method as described in any one of claims 1-3.

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