Air conditioner indoor unit structure, air conditioner and air conditioner leakage judgment method

Abstract

The invention provides an air conditioner indoor unit structure, an air conditioner and an air conditioner leakage judgment method.The air conditioner indoor unit structure comprises a shell, an evaporator and a draught fan, the evaporator and the draught fan are installed in the shell, a refrigerant sensor is arranged in the shell, a baffle assembly is further arranged on the shell, and when a baffle of the baffle assembly descends, an evaporator arrangement area in the shell is divided into a plurality of areas; the refrigerant sensor is located in one area. By arranging the baffle assembly, the arrangement area of the evaporator can be divided into a plurality of areas with the sub-evaporators in an extending mode, and therefore the leakage area can be effectively positioned through multiple times of comparison and judgment, and the judgment precision of the system on refrigerant leakage is improved. And meanwhile, the leaked area can be isolated independently, the sub-evaporators in the leaked area are turned off, and further leakage is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioner refrigerant safety, and in particular to an air-conditioner internal unit structure, an air-conditioner and an air-conditioner leakage judgment method. Background Art

[0002] R32 is a flammable refrigerant with high flammability. Once a refrigerant leak occurs, it may bring a series of serious safety risks. First, after R32 mixes with air, it may form an explosive gas mixture, especially in a closed or poorly ventilated space. Once this mixture encounters an open flame or high temperature source, it may cause an explosion, causing casualties and property losses. In addition, leaked R32 may also cause a fire, especially in hot weather or when the equipment is under a heavy workload. The leaked refrigerant may react with the surrounding heat source, causing the fire to spread and increasing safety hazards.

[0003] Secondly, the leakage of R32 will directly affect the normal operation of the air conditioning system. Once the refrigerant leaks, the cooling effect of the air conditioner will be significantly reduced, the indoor temperature will be difficult to control, and the efficiency of the equipment will be greatly reduced. With the further loss of refrigerant, the air conditioning system may face faults such as overheating and overload. In particular, the compressor may be damaged due to lack of sufficient refrigerant lubrication, or even cause the equipment to shut down completely. This will not only cause inconvenience to users, but may also lead to high maintenance costs and equipment replacement costs.

[0004] In addition, as a greenhouse gas, R32's leakage into the atmosphere will intensify the greenhouse effect and further affect global climate change. Although R32 has a low greenhouse effect potential, long-term or large-scale leakage still causes certain harm to the environment, especially in the context of increasingly severe climate change, its negative impact on the ecological environment cannot be ignored.

[0005] In summary, the leakage of R32 refrigerant will not only cause equipment failure and safety hazards, but also have adverse effects on the environment, so its leakage risk cannot be ignored. The existing conventional treatment method is usually to install a refrigerant leakage sensor in the indoor unit of the air-conditioning system to detect refrigerant leakage and send out an alarm signal. Although this method can promptly remind users of the occurrence of refrigerant leakage, it still has some limitations. First, the refrigerant leakage sensor can only detect the leakage of refrigerant, but cannot effectively locate the specific leakage location, which makes the solution of the problem complicated. Secondly, the sensor alarm alone cannot directly deal with the leaking refrigerant, nor can it prevent the refrigerant from continuing to leak or further safety risks. Therefore, the existing refrigerant leakage treatment solution still has certain blind spots and shortcomings when facing leakage incidents. Summary of the invention

[0006] In order to solve the technical problem in the prior art that the leakage position of refrigerant cannot be further determined, the present invention proposes an air conditioner indoor unit structure, an air conditioner and a refrigerant control method.

[0007] The technical solution adopted by the present invention is:

[0008] The present invention proposes an air conditioner indoor unit structure, comprising: a shell, an evaporator installed in the shell, and a fan. A refrigerant sensor is provided in the shell. A baffle assembly is also provided on the shell. When the baffle of the baffle assembly is lowered, the evaporator setting area in the shell is divided into multiple areas. The refrigerant sensor is located in one of the areas.

[0009] Furthermore, the evaporator includes a plurality of sub-evaporators which are independently switched on and off and installed in different areas, and the inlet and outlet of each sub-evaporator are provided with a stop valve.

[0010] Furthermore, the evaporator includes a first sub-evaporator and a second sub-evaporator, and the refrigerant sensor is arranged in the area where the first sub-evaporator is located.

[0011] The baffle assembly comprises:

[0012] A first rotating shaft is located at the upper part of the evaporator setting area and is driven to rotate by a first motor;

[0013] A second rotating shaft is located at the bottom of the evaporator setting area and is driven to rotate by a second motor;

[0014] A flexible baffle, one end of which is wound around the first rotating shaft, and the other end is connected to the second rotating shaft through a plurality of connecting wires. When the second motor rotates, the connecting wires are wound around the second rotating shaft and drive the baffle to move down to divide the evaporator setting area into a first area for setting the first sub-evaporator and a second area for setting the second sub-evaporator.

[0015] Furthermore, the baffle assembly also includes: a first air inlet baffle arranged at the air inlet of the first area and a second air inlet baffle arranged at the air inlet of the second area.

[0016] An air conditioner, characterized by comprising the air conditioner indoor unit structure according to any one of claims 1 to 5.

[0017] A method for judging refrigerant leakage of an air conditioner, using the above air conditioner, comprises the following steps:

[0018] Determine whether the refrigerant sensor responds;

[0019] If the baffle of the baffle assembly is controlled to descend when the refrigerant sensor responds, and if the refrigerant sensor stops responding, it is determined that refrigerant leakage occurs in the second area, and no refrigerant leakage occurs in the first area.

[0020] Further, after the baffle of the baffle assembly is controlled to descend, the refrigerant sensor continues to respond;

[0021] closing the stop valve of the first sub-evaporator in the first area, controlling the baffle of the baffle assembly to rise, and determining again whether the refrigerant sensor responds;

[0022] If so, it is determined that refrigerant leakage occurs in both the first area and the second area;

[0023] If not, it is determined that refrigerant leakage occurs in the first area, and refrigerant leakage does not occur in the second area.

[0024] Furthermore, when the air conditioner is in operation, when the refrigerant sensor response is detected for the first time, the fan is turned off after a preset time.

[0025] Furthermore, after the response of the refrigerant sensor is detected for the first time, the fan switch is controlled a preset number of times in each subsequent action.

[0026] Furthermore, when it is determined that refrigerant leakage occurs in any area, the baffle of the baffle assembly is controlled to remain in a lowered state, and the air inlet baffle corresponding to the area where the refrigerant leakage occurs is closed.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] By setting up a baffle assembly, the evaporator setting area can be divided into multiple areas with sub-evaporators when extended or retracted. Through multiple comparisons and judgments, the leakage area can be effectively located, and the system's judgment accuracy of refrigerant leakage can be improved. The refrigerant sensor of this method is set in the first area, and there is no need to increase it on the original basis. Combined with the separation of the area by the baffle, the area where the leakage occurs can be accurately judged. Compared with traditional methods, this technical solution can not only determine the refrigerant leakage location more quickly, but also significantly improve the efficiency and accuracy of fault diagnosis and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 is a simplified structural diagram of an embodiment of the present invention;

[0031] Figure 2 is a simplified structural diagram of the evaporator arrangement area in an embodiment of the present invention;

[0032] Figure 3 is a front view of the internal structure of the inner machine in an embodiment of the present invention;

[0033] Figure 4 is a side view of the internal structure of the inner machine in an embodiment of the present invention;

[0034] Figure 5 is a flow chart in an embodiment of the present invention;

[0035] Figure 6 is a flow chart in a specific embodiment of the present invention;

[0036] 11. a first sub-evaporator; 12. a second sub-evaporator;

[0037] 2. Fan;

[0038] 31. First rotating shaft; 32. Second rotating shaft; 33. Baffle; 34. Air inlet baffle;

[0039] 4. Refrigerant sensor;

[0040] 5. Stop valve; DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0043] The leakage of R32 refrigerant will not only cause equipment failure and safety hazards, but also have adverse effects on the environment, so its leakage risk cannot be ignored.

[0044] The existing technology is that the refrigerant leakage sensor installed in the indoor unit of the air conditioning system can only detect the refrigerant leakage, but cannot effectively locate the specific leakage location, which makes the solution of the problem complicated. Secondly, the sensor alarm alone cannot directly deal with the leaking refrigerant, nor can it prevent the refrigerant from continuing to leak or further safety risks. Therefore, the existing refrigerant leakage treatment solution still has certain blind spots and shortcomings when facing leakage incidents.

[0045] In this regard, Figures 1 to 4As shown, the present invention proposes an air conditioner indoor unit structure, specifically including: a shell, an evaporator, a refrigerant sensor 4, a fan 2 and a baffle assembly, the shell contains two adjacent installation areas, and the two installation areas are in a connected state, wherein the fan 2 is installed in the fan 2 installation area, the evaporator is installed in the evaporator setting area, the baffle assembly is installed in the shell, and when the baffle 33 of the baffle assembly is extended (or called descended), the evaporator setting area in the shell can be divided into multiple areas, and the refrigerant sensor 4 is located in one of the areas.

[0046] By setting up a baffle assembly, it can be extended or retracted when the refrigerant sensor 4 detects the refrigerant, and the area where the refrigerant leakage may occur can be divided into multiple areas. Then, through multiple comparisons and judgments, it can be known which specific area has the refrigerant leakage. Taking two areas as an example, after the refrigerant sensor 4 detects the refrigerant leakage, the baffle 33 can be lowered first. If the refrigerant sensor 4 can no longer detect the refrigerant leakage, it can be determined that there is no leakage in the area where the refrigerant sensor 4 is located, and there is a leakage in another area. Taking three areas as an example, after the refrigerant sensor 4 detects the refrigerant leakage, the baffle 33 can be lowered first. If the refrigerant sensor 4 can no longer detect the refrigerant leakage, it can be determined that there is no leakage in the area where the refrigerant sensor 4 is located, and then the baffle 33 between the area where the refrigerant sensor 4 is located and the adjacent area is retracted for judgment, and it can be determined which of the remaining two areas has the refrigerant leakage.

[0047] In a specific embodiment, the evaporator includes a plurality of sub-evaporators which are individually switched on and off and installed in different areas, and the inlet and outlet of each sub-evaporator are respectively provided with a stop valve 5. That is, the plurality of sub-evaporators are in a parallel state, and any sub-evaporator can be disconnected individually, and the indoor unit can still keep running.

[0048] By dividing the evaporator into multiple sub-evaporators, refrigerant leakage is generally caused by leakage of the heat exchange tube of the evaporator. That is, when refrigerant leakage occurs, the leaking sub-evaporator can be shut down alone, while other non-leaking sub-evaporators can continue to work.

[0049] Specifically, the evaporator includes a first sub-evaporator and a second sub-evaporator, and the refrigerant sensor is arranged in the area where the first sub-evaporator is located; the first sub-evaporator and the second sub-evaporator are arranged to be inclined to each other in an inverted V shape. The area between the first sub-evaporator and the second sub-evaporator can pass through the baffle, so that the baffle can be smoothly lowered.

[0050] The inverted V-shaped evaporator is an existing evaporator structure. The present application divides the evaporator into two, which means that there is no need to make major changes to the existing evaporator structure, and at the same time, the baffle can be easily lowered for blocking.

[0051] In a specific embodiment, the baffle assembly includes: a first rotating shaft 31, a second rotating shaft 32, and a flexible baffle 33. The first rotating shaft 31 is rotatably mounted on the top of the evaporator setting area, and the second rotating shaft 32 is rotatably mounted on the bottom of the evaporator setting area. At the same time, the first rotating shaft 31 is also coordinated with the first motor, and the first rotating shaft 31 can be driven to rotate by the first motor. The second rotating shaft 32 is coordinated with the second motor, and the second rotating shaft 32 can be driven to rotate by the second motor. One end of the baffle 33 is wound around the first rotating shaft 31, and the other end is connected to the second rotating shaft 32 through a plurality of connecting wires. When the second motor rotates, the connecting wire is wound around the second rotating shaft 32, and the baffle 33 is driven to move downward to divide the evaporator setting area into a first area where the first sub-evaporator 11 is set and a second area where the second sub-evaporator 12 is set.

[0052] That is, the baffle 33 is in the form of a scroll. By rotating the second rotating shaft 32, the connecting wire is wound around the second rotating shaft 32, so that the baffle 33 gradually unfolds and descends from a curled state, and the evaporator setting area is divided into two areas. Since the baffle 33 is in the form of a scroll, the baffle 33 has a certain flexibility. When the baffle 33 is partially blocked when it descends (because there are many pipes in the evaporator setting area and strict regional setting cannot be performed), the baffle 33 retreats through deformation, so that it can smoothly descend for separation.

[0053] In a specific embodiment, the baffle assembly further includes: a first air inlet baffle disposed at the air inlet of the first area, and a second air inlet baffle disposed at the air inlet of the second area.

[0054] That is, when a refrigerant leakage occurs, the baffle 33 can be lowered and the air inlet baffle 34 in the leakage area can be closed to prevent air from flowing through the area. This prevents the leaked refrigerant from being blown into the room by the fan 2 and causing harm, and the air-conditioning equipment can continue to operate under certain conditions.

[0055] The present invention also provides an air conditioner, comprising the above-mentioned indoor unit structure.

[0056] By setting a baffle assembly inside the indoor unit of the air conditioner, the baffle extends to divide the evaporator setting area into multiple areas with sub-evaporators. Through multiple comparisons and judgments, the leakage area can be effectively located, and the system's judgment accuracy for refrigerant leakage can be improved. At the same time, the leaking area can be isolated separately, and the sub-evaporator in the leaking area can be shut down to prevent further leakage.

[0057] like Figure 5 , 6As shown, the present invention also proposes a method for judging air conditioning refrigerant leakage, using an air conditioner including the above-mentioned air conditioner inner unit structure, the air conditioner except the inner unit structure has other parts consistent with conventional air conditioners, for example, it also has an outer unit, a controller and other parts. Specifically comprising the steps:

[0058] Determine whether the refrigerant sensor responds;

[0059] If the refrigerant sensor responds normally, the baffle of the baffle assembly will automatically drop to separate the evaporator setting area into a first area and a second area. The first area is provided with a first sub-evaporator 11, and the second area is provided with a second sub-evaporator 12. This zoning operation helps to accurately control and monitor the flow of refrigerant;

[0060] The refrigerant sensor is only located in the first area. When the refrigerant sensor stops responding in the first area, it means that there is no refrigerant leakage in this area. The reason why the refrigerant stops responding is that the baffle blocks the refrigerant flow between the first area and the second area, so the refrigerant situation in the second area cannot be detected. When a leak occurs in the second area, due to the obstruction of the baffle, the refrigerant sensor cannot sense the refrigerant changes in the second area, resulting in stopping the response.

[0061] The system determines the specific area of ​​refrigerant leakage by the response state of the refrigerant sensor. If the refrigerant sensor stops responding, it is determined that refrigerant leakage has occurred in the second area, while no leakage has occurred in the first area.

[0062] In this way, the leakage area can be effectively located and the accuracy of the system's judgment on refrigerant leakage can be improved. The refrigerant sensor of this method is set in the first area, and there is no need to add it on the original basis. In combination with the separation of the area by the baffle, the area where the leakage occurs can be accurately determined. Compared with the traditional method, this technical solution can not only determine the refrigerant leakage location more quickly, but also significantly improve the efficiency and accuracy of fault diagnosis and reduce maintenance costs.

[0063] In a specific embodiment, after the baffle of the baffle assembly is controlled to descend, when the refrigerant sensor continues to respond, the system closes the stop valve of the first sub-evaporator of the first area, and controls the baffle of the baffle assembly to rise, thereby releasing the separation between the first area and the second area;

[0064] The system determines again whether the refrigerant sensor continues to respond;

[0065] If the refrigerant sensor still responds normally, it indicates that refrigerant leakage has occurred in both the first and second zones. Since the refrigerant sensor can continue to detect abnormal refrigerant flow after the partition is removed, the system determines that refrigerant leakage exists in both zones.

[0066] If the refrigerant sensor does not continue to respond, the system determines that a refrigerant leak has occurred in the first area, but not in the second area. At this time, the refrigerant sensor fails to respond because the shutoff valve of the first sub-evaporator has been closed, resulting in the refrigerant flow in the first area being blocked, and the refrigerant leak cannot be detected. Since the refrigerant sensor can no longer sense the flow change, the system infers that the leak only occurs in the first area, and there is no leak in the second area.

[0067] By controlling the lifting and lowering status of the stop valve and baffle of the first sub-evaporator, the area of ​​refrigerant leakage can be accurately determined. The system can quickly determine the refrigerant leakage in each area by the response of the refrigerant sensor and the control of the evaporator area, thereby effectively improving the fault diagnosis accuracy and response efficiency of the air conditioning system and reducing unnecessary intervention during the maintenance process.

[0068] In a specific embodiment, when the air conditioner is in operation and the refrigerant sensor response is detected for the first time, the system will shut down the fan after a preset time. At this time, the response of the refrigerant sensor indicates that a refrigerant leak has occurred, rather than the refrigerant flowing normally in the evaporator. The abnormal response of the refrigerant sensor usually indicates a refrigerant leak, and the system determines that protective measures need to be taken immediately based on this signal.

[0069] After detecting a refrigerant leak, the system will shut down the fan to prevent the refrigerant leak from spreading indoors. Shutting down the fan can effectively reduce the amount of leaked refrigerant being brought into the room by air flow, ensure the safety of the indoor environment, and prevent the potential impact of refrigerant on indoor air quality.

[0070] By shutting down the fan, the system can quickly cut off the contact between the leakage source and the indoor air, thereby minimizing the impact of refrigerant leakage on the use environment and ensuring the safety and efficiency of the air-conditioning system when refrigerant leakage occurs.

[0071] In a specific embodiment, after the response of the refrigerant sensor is detected for the first time, the fan is controlled to be turned on and off for a preset number of times before determining whether the refrigerant sensor has responded each time thereafter, for example, twice.

[0072] By controlling the fan to turn it on and off multiple times, the refrigerant sensor can be prevented from misjudging and the accuracy of fault diagnosis can be improved.

[0073] In a specific embodiment, when it is determined that a refrigerant leak occurs in any area, the system controls the baffle of the baffle assembly to remain in a lowered state, thereby maintaining the separation of the first area from the second area. The baffle remaining in a lowered state helps prevent the refrigerant leak from further spreading, while ensuring the isolation of the refrigerant leak area from other areas, reducing the interference of the leak on other parts of the system.

[0074] In addition, the system will close the air inlet damper in the corresponding area according to the location of the refrigerant leak, and at the same time close the stop valves at the inlet and outlet of the sub-evaporator in the area to prevent further leakage. If the leak occurs in the first area, the air inlet damper in the first area will be closed; if it occurs in the second area, the air inlet damper in the second area will be closed. The purpose of this measure is to further reduce the risk of refrigerant leakage into the room by cutting off the air flow into the leaking area, and effectively isolate the leaking area from the external environment.

[0075] By keeping the damper in the down position and closing the air inlet damper, the system can effectively control the airflow in the leakage area, preventing the refrigerant from spreading to other areas or entering the room, ensuring the safety and efficiency of the air conditioning system in the event of a refrigerant leak.

[0076] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0077] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0078] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0079] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0080] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air conditioner internal unit structure, comprising: A shell, an evaporator installed in the shell and a fan, a refrigerant sensor is arranged in the shell, and the shell is characterized in that a baffle assembly is also arranged on the shell, and when the baffle of the baffle assembly is lowered, the evaporator setting area in the shell is divided into multiple areas, and the refrigerant sensor is located in one of the areas.

2. The air conditioner indoor unit structure according to claim 1, characterized in that: The evaporator comprises a plurality of sub-evaporators which are independently switched on and off and installed in different areas, and the inlet and outlet of each sub-evaporator are respectively provided with a stop valve.

3. The air conditioner indoor unit structure according to claim 1, characterized in that: The evaporator includes a first sub-evaporator and a second sub-evaporator, and the refrigerant sensor is arranged in the area where the first sub-evaporator is located.

4. The air conditioner indoor unit structure according to claim 3, characterized in that: The baffle assembly comprises: A first rotating shaft is located at the upper part of the evaporator setting area and is driven to rotate by a first motor; A second rotating shaft is located at the bottom of the evaporator setting area and is driven to rotate by a second motor; A flexible baffle, one end of which is wound around the first rotating shaft, and the other end is connected to the second rotating shaft through a plurality of connecting wires. When the second motor rotates, the connecting wires are wound around the second rotating shaft and drive the baffle to move down to divide the evaporator setting area into a first area for setting the first sub-evaporator and a second area for setting the second sub-evaporator.

5. The air conditioner internal unit structure according to claim 4, characterized in that: The baffle assembly further includes: a first air inlet baffle arranged at the air inlet of the first area and a second air inlet baffle arranged at the air inlet of the second area.

6. An air conditioner, characterized in that: It comprises the air conditioner indoor unit structure as described in any one of claims 1 to 5.

7. A method for judging air conditioning refrigerant leakage, characterized in that: Using the air conditioner as claimed in claim 6 comprises the steps of: Determine whether the refrigerant sensor responds; When the refrigerant sensor responds, the baffle of the baffle assembly is controlled to descend. If the refrigerant sensor stops responding, it is determined that refrigerant leakage occurs in the second area, and no refrigerant leakage occurs in the first area.

8. The air conditioning leakage determination method according to claim 7, characterized in that: After the baffle of the control baffle assembly is lowered, if the refrigerant sensor continues to respond; closing the stop valve of the first sub-evaporator in the first area, controlling the baffle of the baffle assembly to rise, and determining again whether the refrigerant sensor responds; If so, it is determined that refrigerant leakage occurs in both the first area and the second area; If not, it is determined that refrigerant leakage occurs in the first area, and refrigerant leakage does not occur in the second area.

9. The air conditioning leakage determination method according to claim 7, characterized in that: When the air conditioner is in operation and the refrigerant sensor response is detected for the first time, the fan is turned off after a preset time.

10. The air conditioning leakage determination method according to claim 7, characterized in that: After the response of the refrigerant sensor is detected for the first time, the fan switch is controlled a preset number of times before determining whether the refrigerant sensor responds each subsequent time.

11. The air conditioning leakage determination method according to claim 7 or 8, characterized in that: When it is determined that refrigerant leakage occurs in any area, the baffle of the baffle assembly is controlled to remain in a lowered state, and the air inlet baffle corresponding to the area where the refrigerant leakage occurs is closed.

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