Air conditioning system and detection method

Abstract

The invention provides an air conditioning system and a detection method, and the air conditioning system comprises a heat exchange pipeline arranged in a heat exchange space; the heat exchange pipeline is used for conveying a refrigerant; the refrigerant leakage sensor is arranged in the heat exchange space; the air supply structure is arranged in the heat exchange space; the air supply structure is used for blowing air in the heat exchange space to the refrigerant leakage sensor; according to the air conditioning system, the problem that when the indoor unit is shut down or a draught fan of the indoor unit breaks down, the refrigerant leakage sensor cannot detect whether refrigerant leakage exists in the external environment of the indoor unit or not is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioning system and a detection method. Background Art

[0002] When existing air-conditioning systems use flammable and toxic refrigerants such as R32, in order to protect user safety, a refrigerant leakage sensor is generally installed inside the indoor unit to detect whether there is refrigerant leakage in the air-conditioning unit. The detection method is that when the refrigerant concentration inside the indoor unit reaches a certain value, the refrigerant leakage sensor will alarm, thereby starting the corresponding protection operation of the air-conditioning system. The disadvantage of this detection method is that it can only be detected inside the indoor unit. When the indoor unit is turned off or the internal fan fails to operate, the air inside the indoor unit is not circulated, and it is impossible to detect whether there is refrigerant leakage in the external environment of the indoor unit. The detection accuracy of the refrigerant leakage sensor will be greatly reduced.

[0003] For large air conditioning systems such as modular multi-split units, the connecting pipes used for installation are hundreds or even thousands of meters long. Most of these connecting pipes are in indoor spaces, and the connecting pipes are connected by welding. Long-term use of these welding points may cause refrigerant leakage. If the welding point where the leak occurs is not in the room, the refrigerant leakage sensor installed inside the indoor unit cannot detect it; if the welding point where the leak occurs is in the room, when the indoor unit is turned off or the indoor fan fails to operate, the refrigerant leakage sensor cannot detect the refrigerant leakage. In either case, there are major safety hazards; Some central air conditioning systems that use chilled water or other refrigerants for cooling have air conditioner mainframes installed in the basement, such as the central air conditioners used in some libraries. Since the indoor space uses chilled water for cooling, there is no refrigerant leakage sensor installed on the indoor side. If the refrigerant of the mainframe installed in the basement leaks, the refrigerant will gradually float to the ground space. When the concentration accumulates to a certain level, there will be a fire hazard, which is very dangerous.

[0004] Therefore, there is a problem in the prior art that the refrigerant leakage sensor cannot detect whether there is a refrigerant leakage in the external environment of the indoor unit when the indoor unit is shut down or the indoor unit fan fails. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide an air-conditioning system and a detection method to solve the problem in the related art that the refrigerant leakage sensor cannot detect whether there is a refrigerant leakage in the external environment of the indoor unit when the indoor unit is shut down or the indoor unit fan fails.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: providing an air-conditioning system, comprising: a heat exchange pipeline; the heat exchange pipeline is used to transport refrigerant; a refrigerant leakage sensor, the refrigerant leakage sensor is arranged in the heat exchange space; an air supply structure, arranged in the heat exchange space; the air supply structure is used to blow the air in the heat exchange space to the refrigerant leakage sensor; a control module, the control module is used to control the opening and closing of the air supply structure.

[0007] Furthermore, the heat exchange space includes: an indoor unit; a room, the indoor unit is arranged in the room, the refrigerant leakage sensor includes a first sensor arranged inside the indoor unit, and the air supply structure includes a first fan component arranged at the air inlet of the indoor unit.

[0008] Furthermore, the indoor unit is provided with an air valve, and the air valve is used to control the opening and closing of the air inlet; the heat exchange pipeline includes a first heat exchange pipeline arranged in the room.

[0009] Further, the first fan component is arranged above the air inlet; or, the first fan component is arranged on the indoor unit.

[0010] Furthermore, the heat exchange space includes: a corridor, the heat exchange pipeline includes a second heat exchange pipeline arranged in the corridor; the refrigerant leakage sensor includes a second sensor arranged at the top of the corridor; the air supply structure includes a second fan component arranged in the corridor, and the second fan component is used to blow air to the second sensor.

[0011] Furthermore, there are multiple rooms; there are multiple indoor units; and the multiple indoor units are arranged in a one-to-one correspondence with the multiple rooms.

[0012] Furthermore, the heat exchange space includes: a basement, a main unit; the main unit is arranged in the basement, the refrigerant leakage sensor includes a third sensor arranged in the basement, and the third sensor is arranged on the top of the basement; the air supply structure includes a third fan component arranged in the basement.

[0013] Furthermore, the heat exchange space includes: a floor, located above the basement; the heat exchange pipeline includes a third heat exchange pipeline arranged in the floor, and the third heat exchange pipeline is connected to the main unit in the basement; the refrigerant leakage sensor includes a fourth sensor arranged on the floor, and the fourth sensor is arranged at the top of the floor; the air supply structure includes a fourth fan component arranged on the floor.

[0014] Furthermore, there are a plurality of floors, and the plurality of floors are arranged in sequence along the vertical direction; the third sensor and the fourth fan component are arranged in the lowest floor.

[0015] Furthermore, there are multiple refrigerant leakage sensors, and the multiple refrigerant leakage sensors are arranged at intervals.

[0016] A detection method is applicable to the above-mentioned air-conditioning system, and the detection method comprises: setting a refrigerant leakage sensor in a heat exchange space where an air conditioner is set; blowing the air in the heat exchange space to the refrigerant leakage sensor to detect whether the refrigerant is leaking; and controlling the opening frequency of the air supply structure according to the refrigerant state of the air conditioner; wherein the refrigerant state of the air conditioner includes the type of the refrigerant of the air conditioner and the refrigerant filling amount of the air conditioner.

[0017] Furthermore, when the refrigerant of the air conditioner is only cooled by refrigerant, the control module controls the opening frequency of the fan of the air supply structure according to the filling amount of the refrigerant of the air conditioner; wherein, the greater the filling amount of the refrigerant, the higher the opening frequency of the fan.

[0018] Furthermore, when the refrigerant of the air conditioner adopts refrigerant and coolant, the control module controls the opening frequency of the fan of the air supply structure according to the danger level of the refrigerant in the internal circulation of the air conditioner; wherein, the higher the danger level, the greater the opening frequency of the fan; the danger level of the refrigerant includes the flammability of the refrigerant and the toxicity of the refrigerant.

[0019] Furthermore, the detection method includes: setting an air valve at the air inlet of the indoor unit, using the air valve to suck air outside the indoor unit into the indoor unit, and detecting whether the refrigerant in the heat exchange pipeline in the heat exchange space where the indoor unit is located is leaking by using a refrigerant leakage sensor set inside the indoor unit.

[0020] Furthermore, the detection method includes: arranging the refrigerant leakage sensor and the air supply structure at the upper part of the heat exchange space without the indoor unit to detect whether the refrigerant in the heat exchange pipeline in the heat exchange space is leaking.

[0021] Beneficial effects: 1. When the indoor unit of the air conditioning system of this embodiment is turned off or the indoor fan fails, the fan on the top of the indoor unit casing regularly blows the air from the top of the room to the refrigerant leakage sensor, thereby improving the accuracy of refrigerant leakage detection; 2. When a leak occurs at the welding point of the air-conditioning connecting pipe of the air-conditioning system of this embodiment, a refrigerant leakage sensor is added above the indoor space where the connecting pipe passes. The fan is turned on regularly to blow the air from the top of the room to the refrigerant leakage sensor to realize refrigerant leakage detection and avoid the safety risks caused by refrigerant leakage from the connecting pipe.

[0022] 3. The air-conditioning system of this embodiment adds a refrigerant leakage sensor at the top of the basement or the top of the first floor of a high-rise building. The fan is turned on regularly to blow air to the refrigerant leakage sensor to realize refrigerant leakage detection and avoid the safety risk caused by the refrigerant leakage of the basement air-conditioning host gathering at the top. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an embodiment of an air conditioning system used in an embodiment of the present invention; Figure 2 is a structural schematic diagram of another embodiment of the air conditioning system used in the embodiment of the present invention; Figure 3 is a flow chart of an embodiment of a detection method adopted in an embodiment of the present invention; Figure 4 It is a flow chart of another embodiment of the detection method adopted in the embodiment of the present invention.

[0024] The above drawings include the following reference numerals: 1. Indoor unit; 11. Air valve; 2. Outdoor unit; 201. Host; 3. Heat exchange pipeline; 31. First heat exchange pipeline; 32. Second heat exchange pipeline; 33. Third heat exchange pipeline; 4. Refrigerant leakage sensor; 41. First sensor; 42. Second sensor; 43. Third sensor; 44. Fourth sensor; 5. Air supply structure; 51. First fan component; 52. Second fan component; 53. Third fan component; 54. Fourth fan component; 10. heat exchange space; 101. room; 102. corridor; 103. basement; 104. floor. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] See also Figures 1 to 4According to an embodiment of the present invention, an air conditioning system is provided, including: a heat exchange pipeline 3, arranged in a heat exchange space 10; the heat exchange pipeline 3 is used to transport refrigerant; a refrigerant leakage sensor 4, the refrigerant leakage sensor 4 is arranged in the heat exchange space 10; an air supply structure 5, arranged in the heat exchange space 10; the air supply structure 5 is used to blow the air in the heat exchange space 10 to the refrigerant leakage sensor 4; a control module, the control module is used to control the opening and closing of the air supply structure 5.

[0027] With the above arrangement, an air supply structure 5 is provided in the heat exchange space 10, and the leaked refrigerant is blown to the refrigerant leakage sensor 4 through the air supply structure 5. The refrigerant leakage sensor 4 determines whether there is a leakage by the concentration of the refrigerant in the air, and the control module controls the air supply structure 5 to open from time to time, thereby ensuring the safe operation of the air-conditioning system and solving the problem that the refrigerant leakage sensor cannot detect whether there is a refrigerant leakage in the external environment of the indoor unit when the indoor unit is shut down or the indoor unit fan fails.

[0028] In the air-conditioning system of this embodiment, the heat exchange space 10 includes: an indoor unit 1; a room 101, the indoor unit 1 is arranged in the room 101, the refrigerant leakage sensor 4 includes a first sensor 41 arranged inside the indoor unit 1, and the air supply structure 5 includes a first fan component 51 arranged at the air inlet of the indoor unit 1.

[0029] For ease of description, Figure 1 There are two welding points for the heat exchange pipe 3, one is welding point A at the top of room 101, and the other is welding point B at the top of the corridor. In the actual installation process, the welding point of the heat exchange pipe 3 may be anywhere in the room. The figure is only an example.

[0030] For ease of description, see Figure 1 The fan is drawn above the indoor unit 1, but it may actually be embedded in the top shell of the indoor unit, that is, the fan can be on the indoor unit or added separately outside the indoor unit.

[0031] See also Figure 1 In the air conditioning system of this embodiment, the indoor unit 1 is provided with a wind valve 11, and the wind valve 11 is used to control the opening and closing of the air inlet; the heat exchange pipeline 3 includes a first heat exchange pipeline 31 arranged in the room 101.

[0032] Specifically, during normal operation of the indoor unit 1 , the air valve shown in the figure remains closed to prevent air leakage, and the refrigerant leakage sensor 4 only detects whether there is refrigerant leakage in the air circulating inside the indoor unit 1 .

[0033] See also Figure 1In the air conditioning system of this embodiment, the first fan component 51 is arranged above the air inlet; or, the first fan component 51 is arranged on the indoor unit 1.

[0034] In this way, when the indoor unit 1 is turned on, the fan can suck the air from the top of the room around the indoor unit 1 into the indoor unit 1. If the external copper pipe leaks refrigerant, the refrigerant will float to the top of the room and then be sucked into the indoor unit 1 by the fan that is turned on at this time, and the internal refrigerant leakage sensor will detect whether there is refrigerant leakage.

[0035] See also Figure 1 In the air-conditioning system of this embodiment, the heat exchange space 10 includes: a corridor 102, the heat exchange pipeline 3 includes a second heat exchange pipeline 32 arranged in the corridor 102; the refrigerant leakage sensor 4 includes a second sensor 42 arranged at the top of the corridor 102; the air supply structure 5 includes a second fan component 52 arranged in the corridor 102, and the second fan component 52 is used to blow air to the second sensor 42.

[0036] In the current air-conditioning indoor unit 1 products on the market, the refrigerant leakage sensor 4 is installed inside the indoor unit 1. The refrigerant leakage is only checked to see if the copper pipe inside the indoor unit 1 is broken and leaking refrigerant. However, there is not only a copper pipe inside the indoor unit 1 in the room, but also a section of copper pipe on the wall (connected to the outdoor unit). The refrigerant leakage sensor 4 installed inside the indoor unit 1 cannot detect whether this part of the copper pipe on the external wall is worn or broken or the welding point is desoldering, etc., which may cause refrigerant leakage.

[0037] When the indoor unit 1 is turned on, the fan can operate to draw air from the top of the room around the indoor unit 1 into the indoor unit 1. If the external copper pipe leaks refrigerant, the refrigerant will float to the top of the room and then be sucked into the indoor unit 1 by the fan that is turned on at this time, and the internal refrigerant leakage sensor 4 will detect whether there is refrigerant leakage.

[0038] If the indoor unit 1 is turned off or the fan fails, the fan will not run. At this time, the refrigerant leakage sensor 4 installed inside the indoor unit 1 cannot detect whether there is refrigerant leakage in the section of copper pipe installed on the wall. At this time, the fan on the top of the indoor unit 1 can be turned on regularly to blow the air near the top of the indoor unit 1 to the refrigerant leakage sensor 4 for detection.

[0039] In the air conditioning system of this embodiment, see Figure 1 There are multiple rooms 101; there are multiple indoor units 1; and multiple indoor units 1 are arranged one-to-one correspondingly to multiple rooms 101. In this way, it can be applied to the scene of multiple rooms to ensure the normal operation of the air conditioning system.

[0040] In the air conditioning system of this embodiment, see Figure 2 The heat exchange space 10 includes: a host 201; a basement 103, the host 201 is arranged in the basement 103, the refrigerant leakage sensor 4 includes a third sensor 43 arranged in the basement 103, and the third sensor 43 is arranged on the top of the basement 103; the air supply structure 5 includes a third fan component 53 arranged in the basement 103.

[0041] Since the refrigerant system and the secondary coolant system are different, and the places of application are also different, the air conditioning system with secondary coolant is generally suitable for places with basements. The above settings can meet the application of the air conditioning system with secondary coolant.

[0042] In the air conditioning system of this embodiment, see Figure 2 The heat exchange space 10 includes: a floor 104, located above the basement 103; the heat exchange pipeline 3 includes a third heat exchange pipeline 33 arranged in the floor 104, and the third heat exchange pipeline 33 is connected to the main unit 201 of the basement 103; the refrigerant leakage sensor 4 includes a fourth sensor 44 arranged on the floor 104, and the fourth sensor 44 is arranged on the top of the floor 104; the air supply structure 5 includes a fourth fan component 54 arranged on the floor 104.

[0043] With the above arrangement, refrigerant leaking onto the floor can be detected.

[0044] In the air conditioning system of this embodiment, see Figure 2 There are multiple floors 104, and the multiple floors 104 are arranged in sequence along the vertical direction; the third sensor 43 and the fourth fan component 54 are arranged in the lowest floor 104.

[0045] Since the leakage of refrigerant generally only spreads to one floor, the third sensor 43 and the fourth fan component 54 are arranged on the lowest floor, so that the effect of accurate detection can be achieved, thereby reducing the cost.

[0046] In the air conditioning system of this embodiment, see Figure 2 There are multiple refrigerant leakage sensors 4, and the multiple refrigerant leakage sensors 4 are arranged at intervals. In this way, the detection range of the refrigerant can be increased to ensure the normal operation of the air conditioning system.

[0047] See also Figure 3 , Figure 4The detection method of this embodiment is applicable to the above-mentioned air-conditioning system, and the detection method includes: setting a refrigerant leakage sensor 4 in a heat exchange space 10 where an air conditioner is set; blowing the air in the heat exchange space 10 to the refrigerant leakage sensor 4 to detect whether the refrigerant is leaking; according to the refrigerant state of the air conditioner, controlling the opening frequency of the air supply structure 5; wherein the refrigerant state of the air conditioner includes the type of the refrigerant of the air conditioner and the refrigerant filling amount of the air conditioner.

[0048] By adopting the above arrangement, the opening frequency of the air supply structure 5 can be effectively regulated, thereby reducing costs while ensuring timely detection of leakage.

[0049] See also Figure 3 When the refrigerant of the air conditioner is only refrigerated by refrigerant, the control module controls the opening frequency of the fan of the air supply structure according to the filling amount of the refrigerant of the air conditioner; wherein, the greater the filling amount of the refrigerant, the higher the opening frequency of the fan.

[0050] With the above arrangement, the fan on the top of the indoor unit 1 does not run (because there is a time interval). During the time interval, the refrigerant leakage sensor 4 still alarms, which indicates that the alarm is not caused by the air in the external space on the top of the indoor unit 1, but by the rupture of the copper tube inside the indoor unit 1. The refrigerant leaks inside the indoor unit 1, causing the internal refrigerant concentration to increase, thereby triggering the alarm.

[0051] See also Figure 4 When the refrigerant of the air conditioner adopts refrigerant and coolant, the control module controls the opening frequency of the fan of the air supply structure according to the danger level of the refrigerant in the internal circulation of the air conditioner; wherein, the higher the danger level, the greater the opening frequency of the fan; the danger level of the refrigerant includes the flammability of the refrigerant and the toxicity of the refrigerant.

[0052] By adopting the above arrangement, the opening frequency of the air supply structure 5 can be effectively regulated, thereby reducing costs while ensuring timely detection of leakage.

[0053] In the detection method of this embodiment, see Figure 4 The detection method includes: setting an air valve 11 at the air inlet of the indoor unit 1, using the air valve 11 to suck the air outside the indoor unit 1 into the indoor unit 1, and detecting whether the refrigerant in the heat exchange pipeline 3 in the heat exchange space 10 where the indoor unit 1 is located is leaking through a refrigerant leakage sensor 4 set inside the indoor unit 1.

[0054] With the above arrangement, the refrigerant leakage sensor 4 inside the indoor unit 1 can be used to detect the refrigerant leakage in the space where the indoor unit 1 is located, thereby reducing the cost.

[0055] In the detection method of this embodiment, the detection method includes: arranging the refrigerant leakage sensor 4 and the air supply structure 5 in the upper part of the heat exchange space 10 without the indoor unit 1 to detect whether the refrigerant in the heat exchange pipeline 3 in the heat exchange space 10 is leaking. In this way, the refrigerant leakage of the heat exchange pipeline 3 at various positions can be detected.

[0056] Embodiment 1: When the indoor unit 1 is turned off or the fan fails to operate, perform refrigerant leakage detection in the indoor space in the following manner: Table 1: Method 1 Before the fan is turned on, the air valve 11 on the top of the indoor unit 1 is opened by default.

[0057] exist Figure 1 In the figure, there are welding points A and B on the heat exchange pipeline 3, welding point A is in the room, and welding point B is in the corridor.

[0058] For welding point A, since there is an indoor unit 1 in the room, when the indoor unit 1 is turned off or the fan fails to operate, the refrigerant leakage detection of welding point A can be performed with reference to the above method 1. During the execution of method 1, that is, when the fan is not turned on, the refrigerant leakage sensor 4 alarms, indicating that there is a refrigerant leakage inside the indoor unit 1. No matter which case, once the refrigerant leakage is detected, the same protection control of the system is executed.

[0059] When the indoor unit 1 is turned on, the refrigerant leakage sensor 4 only detects whether there is refrigerant leakage in the air circulating inside the indoor unit 1, and the air valve at the top of the indoor unit 1 is closed.

[0060] For welding point B, since indoor unit 1 is not installed in the corridor, it is assumed that indoor unit 1 is always turned off or the fan is faulty, and refrigerant leakage detection is always performed in accordance with the above method 1.

[0061] Embodiment 2: For air conditioning systems using refrigerant, some air conditioning systems are installed in the following ways: Figure 2 shown.

[0062] exist Figure 2 In the case of a refrigerant cooling system, the indoor space is cooled by a refrigerant. The main unit of the air conditioning system is installed in the basement 103. The refrigerant and the refrigerant complete the heat exchange in the basement 103. The refrigerant completes the refrigerant circulation only in the main unit in the basement 103. If the main unit leaks refrigerant at this time, the refrigerant will gradually gather at the top of the basement 103 and may even float to the top of the first floor. In this case, the refrigerant detection can be carried out according to the following method 2: Table 2: Method 2 It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0063] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0064] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0065] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0066] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An air conditioning system, characterized in that: include: A heat exchange pipeline (3) is arranged in the heat exchange space (10); the heat exchange pipeline (3) is used to transport refrigerant; A refrigerant leakage sensor (4), the refrigerant leakage sensor (4) being arranged in the heat exchange space (10); An air supply structure (5) is arranged in the heat exchange space (10); the air supply structure (5) is used to blow the air in the heat exchange space (10) to the refrigerant leakage sensor (4); A control module, the control module is used to control the opening and closing of the air supply structure (5).

2. The air conditioning system according to claim 1, characterized in that: The heat exchange space (10) comprises: Indoor unit (1); A room (101), the indoor unit (1) being arranged in the room (101), the refrigerant leakage sensor (4) comprising a first sensor (41) arranged inside the indoor unit (1), and the air supply structure (5) comprising a first fan component (51) arranged at an air inlet of the indoor unit (1).

3. The air conditioning system according to claim 2, characterized in that: The indoor unit (1) is provided with an air valve (11), and the air valve (11) is used to control the opening and closing of the air inlet; the heat exchange pipeline (3) comprises a first heat exchange pipeline (31) arranged in the room (101).

4. The air conditioning system according to claim 3, characterized in that: The first fan component (51) is arranged above the air inlet; or the first fan component (51) is arranged on the indoor unit (1).

5. The air conditioning system according to claim 2, characterized in that: The heat exchange space (10) comprises: The corridor (102) is provided with a heat exchange pipeline (3) comprising a second heat exchange pipeline (32) arranged in the corridor (102); the refrigerant leakage sensor (4) comprises a second sensor (42) arranged at the top of the corridor (102); and the air supply structure (5) comprises a second fan component (52) arranged in the corridor (102), and the second fan component (52) is used to blow air toward the second sensor (42).

6. The air conditioning system according to claim 2, characterized in that: There are a plurality of rooms (101); there are a plurality of indoor units (1); and the plurality of indoor units (1) are arranged in a one-to-one correspondence with the plurality of rooms (101).

7. The air conditioning system according to claim 1, characterized in that: The heat exchange space (10) comprises: Host (201); A basement (103), the main unit (201) is arranged in the basement (103), the refrigerant leakage sensor (4) includes a third sensor (43) arranged in the basement (103), and the third sensor (43) is arranged on the top of the basement (103); the air supply structure (5) includes a third fan component (53) arranged in the basement (103).

8. The air conditioning system according to claim 7, characterized in that: The heat exchange space (10) comprises: The floor (104) is located above the basement (103); the heat exchange pipeline (3) includes a third heat exchange pipeline (33) arranged in the floor (104), and the third heat exchange pipeline (33) is connected to the main unit (201) of the basement (103); the refrigerant leakage sensor (4) includes a fourth sensor (44) arranged on the floor (104), and the fourth sensor (44) is arranged on the top of the floor (104); the air supply structure (5) includes a fourth fan component (54) arranged on the floor (104).

9. The air conditioning system according to claim 8, characterized in that: There are a plurality of floors (104), and the plurality of floors (104) are arranged in sequence along a vertical direction; the third sensor (43) and the fourth fan component (54) are arranged in the lowest floor (104).

10. The air conditioning system according to claim 1, characterized in that: There are a plurality of refrigerant leakage sensors (4), and the plurality of refrigerant leakage sensors (4) are arranged at intervals.

11. A detection method, applicable to the air conditioning system according to any one of claims 1 to 10, characterized in that: The detection method comprises: A refrigerant leakage sensor (4) is provided in a heat exchange space (10) where an air conditioner is provided; Blowing the air in the heat exchange space (10) to the refrigerant leakage sensor (4) to detect whether the refrigerant is leaking; The opening frequency of the air supply structure (5) is controlled according to the refrigerant state of the air conditioner; wherein the refrigerant state of the air conditioner includes the type of the refrigerant of the air conditioner and the refrigerant filling amount of the air conditioner.

12. The detection method according to claim 11, characterized in that: When the refrigerant of the air conditioner is only refrigerated by refrigerant, the control module controls the opening frequency of the fan of the air supply structure according to the filling amount of the refrigerant of the air conditioner; wherein, the greater the filling amount of the refrigerant, the higher the opening frequency of the fan.

13. The detection method according to claim 11, characterized in that: When the refrigerant of the air conditioner uses refrigerant and coolant as the refrigerant, the control module controls the opening frequency of the fan of the air supply structure according to the danger level of the refrigerant in the internal circulation of the air conditioner; wherein, the higher the danger level, the greater the opening frequency of the fan; the danger level of the refrigerant includes the flammability of the refrigerant and the toxicity of the refrigerant.

14. The detection method according to claim 11, characterized in that: The detection method comprises: An air valve (11) is provided at the air inlet of the indoor unit (1), and air outside the indoor unit (1) is sucked into the indoor unit (1) by means of the air valve (11). A refrigerant leakage sensor (4) provided inside the indoor unit (1) is used to detect whether refrigerant in a heat exchange pipeline (3) in a heat exchange space (10) where the indoor unit (1) is located is leaked.

15. The detection method according to claim 14, characterized in that: The detection method comprises: The refrigerant leakage sensor (4) and the air supply structure (5) are arranged at the upper part of the heat exchange space (10) without the indoor unit (1) to detect whether the refrigerant in the heat exchange pipeline (3) in the heat exchange space (10) is leaking.

Images