Air handling unit

Abstract

An air handling unit (10), comprising a heat exchanger (100), a first drain pan (200), a second drain pan (300) and a sensor (400). The first drain pan (200) is arranged on the side of the heat exchanger (100) in a first direction (X), and is located below the heat exchanger (100) when the air handling unit (10) is vertically placed in the first direction (X), so as to contain condensate water dripping from the heat exchanger (100). The second drain pan (300) is arranged on the side of the heat exchanger (100) in a second direction (Y), and is located below the heat exchanger (100) when the air handling unit (10) is vertically placed in the second direction (Y), so as to contain condensate water dripping from the heat exchanger (100), the first direction (X) being perpendicular to the second direction (Y). The sensor (400) is configured to detect a refrigerant leaking from the heat exchanger (100).

Description

Air handling units

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311452109.4 filed on November 2, 2023, entitled “Air Handling Unit”, and application number 202322967641.1 filed on November 2, 2023, entitled “Air Handling Unit”. The entire contents of the above patent applications are incorporated into this application by reference. Technical Field

[0003] The present application relates to the technical field of air conditioning, and in particular to an air handling unit. Background Art

[0004] When an air conditioner is operating or in standby mode, refrigerant may leak from the heat exchanger due to poor sealing. This can reduce heat exchange efficiency and pose a safety hazard. Therefore, refrigerant sensors are required to monitor leaks so that personnel can promptly address them, ensuring continued normal operation and eliminating safety hazards. These air conditioners include both vertical and horizontal models.

[0005] In related technologies, due to the uncertainty of the exact location of refrigerant leaks and the diversity of air conditioner installation methods, the placement of refrigerant sensors varies depending on the air conditioner's internal component layout. Consequently, refrigerant sensors are unable to promptly and accurately detect and provide feedback on refrigerant leaks at various locations within the heat exchanger, resulting in poor refrigerant monitoring reliability.

[0006] Summary of the Invention

[0007] In order to at least partially solve one of the above technical problems, the present application proposes an air handling unit.

[0008] The air handling unit proposed according to the embodiment of the present application includes:

[0009] heat exchangers;

[0010] a first water receiving tray, provided on one side of the heat exchanger along the first direction and located below the heat exchanger when the air handling unit is placed vertically along the first direction, for receiving condensed water dripping from the heat exchanger;

[0011] a second water receiving tray, provided on one side of the heat exchanger along the second direction and located below the heat exchanger when the air handling unit is placed vertically along the second direction, for receiving condensed water dripping from the heat exchanger, the first direction being perpendicular to the second direction; and

[0012] a sensor for detecting refrigerant leakage from the heat exchanger;

[0013] Wherein, along the first direction, the sensor is located on a side of the heat exchanger adjacent to the first water receiving tray, and along the second direction, the sensor is located on a side of the heat exchanger adjacent to the second water receiving tray.

[0014] In some embodiments, the heat exchanger includes a coil assembly for conducting refrigerant, one end of the coil assembly along a third direction is an interface end, and the third direction is perpendicular to the first direction and the second direction; along the third direction, the sensor is adjacent to one side of the interface end of the heat exchanger.

[0015] In some embodiments, the sensor is connected to the heat exchanger, and along the first direction, the sensor is located between the heat exchanger and the first water receiving pan.

[0016] In some embodiments, the heat exchanger includes a guard plate facing the first water receiving tray, a connecting plate is connected to a side of the guard plate adjacent to the interface end, and the sensor is connected to a wall of the connecting plate facing away from the guard plate.

[0017] In some embodiments, a side plate of the first water receiving tray along a third direction is a first side plate, the third direction is perpendicular to the first direction and the second direction, and the first side plate is provided with a first drain outlet; along the third direction, the sensor is adjacent to a side of the first side plate of the first water receiving tray.

[0018] In some embodiments, the heat exchanger includes a coil assembly for conducting refrigerant, and one end of the coil assembly along the third direction is an interface end; the first side panel and the interface end are located on the same side along the third direction in the air handling unit.

[0019] In some embodiments, along the second direction, the first drain port is provided on a side of the first side plate adjacent to the second water receiving tray.

[0020] In some embodiments, a side plate of the second water receiving tray along the third direction is a second side plate, and the second side plate is provided with a second drain port.

[0021] In some embodiments, along the first direction, the second drain port is provided on a side of the second side plate adjacent to the first side plate.

[0022] In some embodiments, the plane perpendicular to the first direction is a first projection plane, the first drain outlet forms a first orthographic projection on the first projection plane, the sensor forms a second orthographic projection on the first projection plane, and along the third direction, the first orthographic projection and the second orthographic projection at least partially overlap.

[0023] In some embodiments, a side panel of the second water receiving tray along the third direction is a second side panel, the second side panel is provided with a second drain outlet, the plane perpendicular to the second direction is a second projection plane, the second drain outlet forms a third orthographic projection on the second projection plane, the sensor forms a fourth orthographic projection on the second projection plane, and along the third direction, the third orthographic projection and the fourth orthographic projection at least partially overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] FIG1 is a simplified schematic diagram of an air handling unit according to an embodiment of the present application; wherein the sensor is not shown;

[0026] FIG2 is a simplified schematic diagram of a heat exchanger according to an embodiment of the present application, showing the interface end of the coil assembly;

[0027] FIG3 is a schematic diagram of the area division of an air handling unit in one embodiment of the present application, wherein a first plane, a second plane, and a third plane are shown;

[0028] FIG4 is a schematic diagram of an air handling unit along a first direction in one embodiment of the present application; wherein the sensor and the first drain port are located on the same side of the air handling unit along the first direction;

[0029] FIG5 is a schematic diagram of an air handling unit along a first direction in one embodiment of the present application; wherein the sensor and the first drain port are located on the same side of the air handling unit along a second direction;

[0030] FIG6 is a schematic diagram of an air handling unit along a first direction in one embodiment of the present application; wherein the sensor and the first drain port are located on the same side of the air handling unit along a third direction;

[0031] FIG7 is a schematic structural diagram of an air handling unit along a first direction in one embodiment of the present application; wherein the air handling unit is arranged vertically along a second direction, i.e., arranged in a vertical manner;

[0032] FIG8 is a partial enlarged schematic diagram of point A in FIG7;

[0033] FIG9 is a schematic structural diagram of an air handling unit along a first direction in one embodiment of the present application; wherein the air handling unit is arranged vertically along a third direction, that is, arranged horizontally;

[0034] FIG10 is a schematic structural diagram of an air handling unit according to an embodiment of the present application;

[0035] FIG11 is a partial enlarged schematic diagram of point B in FIG10;

[0036] FIG12 is a schematic diagram of the structure of a sensor and a water retaining portion in one embodiment of the present application; wherein the sensor is sheathed in the water retaining portion;

[0037] FIG13 is a schematic structural diagram of a sensor according to an embodiment of the present application;

[0038] FIG14 is a schematic structural diagram of a water retaining portion in one embodiment of the present application;

[0039] FIG15 is a schematic diagram of an air handling unit according to another embodiment of the present application viewed along a third direction; wherein, along the first direction, the sensor is located on a side of the heat exchanger adjacent to the first water receiving pan;

[0040] FIG16 is a schematic diagram of an air handling unit according to another embodiment of the present application viewed along the third direction; wherein, along the second direction, the sensor is located on a side of the heat exchanger adjacent to the second water receiving pan;

[0041] FIG17 is a schematic structural diagram of an air handling unit in another embodiment of the present application;

[0042] FIG18 is a partial enlarged view of point C in FIG17;

[0043] FIG19 is a schematic structural diagram of an air handling unit viewed along a third direction in another embodiment of the present application; wherein the air handling unit is arranged vertically along a second direction;

[0044] FIG20 is a schematic structural diagram of an air handling unit viewed along a first direction in another embodiment of the present application;

[0045] FIG21 is a partial enlarged view of point D in FIG20;

[0046] FIG22 is a schematic diagram of a heat exchanger and a sensor in another embodiment of the present application;

[0047] FIG23 is a partial enlarged view of point E in FIG22;

[0048] FIG24 is a schematic structural diagram of an air handling unit viewed along a third direction in another embodiment of the present application; wherein the air handling unit is arranged vertically along a first direction;

[0049] FIG25 is a schematic diagram of a coil assembly viewed along a second direction in another embodiment of the present application;

[0050] FIG26 is a schematic structural diagram of a water receiving tray assembly in yet another embodiment of the present application;

[0051] FIG27 is a schematic diagram of a water receiving tray assembly viewed along a first direction in yet another embodiment of the present application;

[0052] FIG28 is a schematic structural diagram of an air handling unit in yet another embodiment of the present application;

[0053] FIG29 is a cross-sectional schematic diagram of an air handling unit viewed along a second direction in yet another embodiment of the present application;

[0054] FIG30 is a partial enlarged view of point F in FIG29;

[0055] FIG31 is a schematic diagram of an air handling unit viewed along the second direction in yet another embodiment of the present application; wherein the air handling unit is arranged vertically along the first direction; and

[0056] Figure 32 is a schematic diagram of an air handling unit observed along the second direction in yet another embodiment of the present application; wherein, the air handling unit is vertically arranged along the fourth direction.

[0057] Description of Figure Numbers:

[0058] Air handling unit 10;

[0059] Water tray assembly 101;

[0060] Heat exchanger 100; coil assembly 110; interface end 111; diverter pipe 112; first diverter assembly 1121; second diverter assembly 1122; guard plate 120; connecting plate 130;

[0061] First water receiving tray 200; first side plate 210; first drain port 211; water receiving chamber 220; water receiving port 230; bottom wall 240; air duct 250; inner wall 260; third side plate 270; fourth side plate 280;

[0062] Second water receiving tray 300; second side plate 310; second drain port 311;

[0063] Sensor 400; opening 410; thermal insulation portion 420;

[0064] Housing 500;

[0065] Water retaining portion 600; water guiding end 610;

[0066] Control component 700;

[0067] Wiring harness 800; first connecting section 810; second connecting section 820; junction portion 830;

[0068] First direction X; second direction Y; third direction Z; fourth direction V;

[0069] First plane a; second plane b; third plane c.

[0070] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0072] In related technologies, due to the uncertainty of the exact location of refrigerant leaks and the diversity of air conditioner installation methods, the placement of refrigerant sensors varies depending on the air conditioner's internal component layout. Consequently, refrigerant sensors are unable to promptly and accurately detect and provide feedback on refrigerant leaks at various locations within the heat exchanger, resulting in poor refrigerant monitoring reliability.

[0073] In view of this, the embodiments of the present application propose an air handling unit 10 that can ensure the reliability of refrigerant monitoring. It is understandable that the air handling unit 10 can be an indoor unit of an air conditioner or an outdoor unit of an air conditioner. The specific details may depend on the actual situation. The embodiments of the present application are described by taking the air handling unit 10 as an indoor unit of an air conditioner as an example. It should be noted that the refrigerant in the embodiments of the present application can be a flammable refrigerant or a non-flammable refrigerant. Some embodiments of the present application are described by taking the refrigerant as a flammable refrigerant as an example. The flammable refrigerant can be R32 or R454B, etc. The specific setting of the refrigerant can refer to the relevant known technology. The air handling unit 10 of the embodiment of the present application is introduced below with reference to Figures 15 to 25. Specifically, the air handling unit 10 includes a heat exchanger 100, a first water receiving tray 200, a second water receiving tray 300 and a sensor 400.

[0074] The heat exchanger 100 is used to exchange heat with the outside air. Referring to Figure 25, the heat exchanger 100 includes a coil assembly 110, which is used to conduct refrigerant. The refrigerant circulates inside the coil assembly 110 and adaptively evaporates or condenses to cool or heat the air. Specifically, when the air conditioner is cooling, the refrigerant evaporates in the coil assembly 110 of the indoor unit and absorbs heat, thereby absorbing indoor heat and lowering the indoor temperature. When the air conditioner is heating, the refrigerant condenses in the coil assembly 110 of the indoor unit and releases heat, thereby releasing heat indoors and raising the indoor temperature. The specific configuration of the heat exchanger 100 can refer to relevant known technologies.

[0075] The first water receiving tray 200 is used to hold condensed water to prevent it from overflowing and flowing into the circuit components inside the air handling unit 10, causing malfunctions. To facilitate description and understanding of the relative positional relationship between the first water receiving tray 200 and the heat exchanger 100, a first direction X is defined. The first water receiving tray 200 is disposed on one side of the heat exchanger 100 along the first direction X. The specific orientation of the first direction X is described below, with the orientation of Figure 15 as a reference. In some embodiments, the first direction X can be an up-down direction, and the first water receiving tray 200 can be disposed on the upper or lower side of the heat exchanger 100 along the up-down direction. In other embodiments, the first direction X can also be a left-right direction, and the first water receiving tray 200 can be disposed on the left or right side of the heat exchanger 100 along the left-right direction. In other embodiments, the first direction X can also be a front-to-back direction, and the first water receiving tray 200 can be disposed on the front or rear side of the heat exchanger 100 along the front-to-back direction. The specific location of the first water receiving tray 200 may be determined according to actual conditions. In some embodiments of the present application, the first water receiving tray 200 is located on the left side of the heat exchanger 100 along the left-right direction as an example for description.

[0076] It should be noted that no matter where the first water receiving tray 200 is specifically located on the heat exchanger 100, when the air handling unit 10 is arranged vertically along the first direction X and operates, the first water receiving tray 200 should be located vertically below the heat exchanger 100 along the first direction X, so that the first water receiving tray 200 can vertically hold condensed water dripping from the heat exchanger 100 along the first direction X.

[0077] The second water tray 300 serves the same purpose as the first water tray 200: it holds condensed water to prevent it from overflowing and flowing into the circuitry within the air handling unit 10, potentially causing malfunctions. It is understood that the second water tray 300 and the first water tray 200 are positioned differently to accommodate the water storage requirements of the air handling unit 10 when it is installed in different scenarios and configurations.

[0078] The specific arrangement of the second water receiving tray 300 is described below. To facilitate description and understanding of the relative positional relationship between the second water receiving tray 300 and the heat exchanger 100, a second direction Y is defined. The second water receiving tray 300 is located on one side of the heat exchanger 100 along the second direction Y. The second direction Y is perpendicular to the first direction X. With reference to the orientation of Figure 15 , in some embodiments, when the first direction X is the up-down direction, the second direction Y can be the left-right direction, that is, the second water receiving tray 300 can be located on the left or right side of the heat exchanger 100 along the left-right direction. The second direction Y can also be the front-to-back direction, that is, the second water receiving tray 300 can be located on the front or rear side of the heat exchanger 100 along the front-to-back direction. In other embodiments, when the first direction X is the left-to-right direction, the second direction Y can be the up-down direction, that is, the second water receiving tray 300 can be located on the upper or lower side of the heat exchanger 100 along the up-down direction. In some embodiments of the present application, the second direction Y points to the up-down direction, and the second water receiving tray 300 is disposed on the lower side of the heat exchanger 100 along the up-down direction.

[0079] It can be understood that no matter where the second water receiving tray 300 is specifically located on the heat exchanger 100, when the air handling unit 10 is placed along the second direction Y and is working, the second water receiving tray 300 should be located vertically below the heat exchanger 100 so that the second water receiving tray 300 can hold the condensed water dripping vertically from the heat exchanger 100.

[0080] It should be noted that the air handling unit 10 of the embodiment of the present application can be installed vertically (see FIG. 19 , arranged vertically along the second direction Y) or horizontally (see FIG. 24 , arranged along the first direction X), thus being adaptable to a variety of application scenarios. The provision of the first water receiving tray 200 and the second water receiving tray 300 can meet the water storage requirements of the heat exchanger 100 under different installation methods.

[0081] Referring to Figure 15 , the air handling unit 10 also includes a sensor 400 , which is used to detect refrigerant leakage from the heat exchanger 100 . Specifically, when refrigerant leaks from the heat exchanger 100 , the sensor 400 detects this abnormality and provides feedback to the controller and relevant personnel, enabling them to promptly address the leak, ensuring the heat exchange efficiency of the heat exchanger 100 and eliminating related safety hazards. The specific configuration of the sensor 400 can be referenced to relevant known technologies.

[0082] With reference to Figure 15 , the following definition defines "along the first direction X, the sensor 400 is located on the side of the heat exchanger 100 adjacent to the first water receiving tray 200": a plane perpendicular to the first direction X is defined as a first plane a. The two opposite outermost endpoints of the heat exchanger 100 along the first direction X are equidistant from the first plane a. Along the first direction X, the sensor 400 is located on the side of the first plane a facing the first water receiving tray 200.

[0083] From the above definition, when the sensor 400 is located on the side of the first plane a away from the first water receiving tray 200 , then along the first direction X, the sensor 400 is disposed on the side of the heat exchanger 100 away from the first water receiving tray 200 .

[0084] With reference to Figure 16 , the following definition defines "along the second direction Y, the sensor 400 is located on the side of the heat exchanger 100 adjacent to the second water receiving tray 300": a plane perpendicular to the second direction Y is defined as the second plane b. The two opposite outermost endpoints of the heat exchanger 100 along the second direction Y are equidistant from the second plane b. Along the second direction Y, the sensor 400 is located on the side of the second plane b facing the second water receiving tray 300.

[0085] From the above definition, when the sensor 400 is located on the side of the second plane b away from the second water receiving tray 300 , then along the second direction Y, the sensor 400 is disposed on the side of the heat exchanger 100 away from the second water receiving tray 300 .

[0086] In the technical solution of the present application, the air handling unit 10 includes a heat exchanger 100, a first water receiving pan 200, a second water receiving pan 300, and a sensor 400. Along the first direction X, the sensor 400 is arranged on the side of the heat exchanger 100 adjacent to the first water receiving pan 200. Along the second direction Y, the sensor 400 is arranged on the side of the heat exchanger 100 adjacent to the second water receiving pan 300. Because the refrigerant is heavier than air, after a refrigerant leak occurs, the leaked refrigerant will be affected by gravity and deposited downward on the first water receiving pan 200 or the second water receiving pan 300. Therefore, the refrigerant concentration in the first water receiving pan 200 or the second water receiving pan 300 is significantly higher than that in other areas within the air handling unit 10. The sensor 400 of this solution is arranged adjacent to both the first water receiving pan 200 and the second water receiving pan 300, which can ensure the accuracy of refrigerant monitoring. Furthermore, regardless of whether the air handling unit 10 is installed vertically or horizontally, the first water tray 200 or the second water tray 300 can be used to collect condensed water, ensuring the air handling unit 10 is waterproof. The placement of the sensor 400 adjacent to both the first water tray 200 and the second water tray 300 can meet the refrigerant monitoring requirements of the air handling unit 10 under different installation configurations. Therefore, the air handling unit 10 of this solution can effectively improve the reliability of refrigerant monitoring, allowing relevant personnel to promptly address refrigerant leaks and ensure the continued normal operation of the air handling unit 10.

[0087] Referring to Figures 17 and 25 , in some embodiments, a heat exchanger 100 includes a coil assembly 110. Coil assembly 110 is used to conduct refrigerant. To facilitate description and understanding of the specific structure of coil assembly 110, a third direction Z is defined. Third direction Z is perpendicular to first direction X and second direction Y. With reference to the orientation in Figure 15 , first direction X can be a left-right direction, second direction Y can be a top-bottom direction, and third direction Z can be a front-back direction.

[0088] One end of the coil assembly 110 along the third direction Z is the interface end 111. When the third direction Z is the front-to-back direction, in some embodiments, the front end of the coil assembly 110 along the front-to-back direction is the interface end 111. In other embodiments, the rear end of the coil assembly 110 along the front-to-back direction is the interface end 111. Some embodiments of the present application are described using the front end of the coil assembly 110 along the front-to-back direction as the interface end 111.

[0089] Referring to Figure 17 , the following describes the specific positional relationship between the sensor 400 and the heat exchanger 100. Specifically, "along the third direction Z, the side of the sensor 400 adjacent to the interface end 111 of the heat exchanger 100" is defined as follows: a plane perpendicular to the third direction Z is defined as the third plane c. The two opposite outermost endpoints of the heat exchanger 100 along the third direction Z are equidistant from the third plane c. Along the third direction Z, the sensor 400 is located on the side of the third plane c facing the interface end 111.

[0090] It should be noted that the first plane a, the second plane b, and the third plane c divide the interior space of the air handling unit 10 into eight small spaces. Referring to Figure 3 , the sensor 400 can be located in a specific small space. For example, in some embodiments, along the first direction X, the sensor 400 is located near the interface end 111 of the heat exchanger 100; along the second direction Y, the sensor 400 is located near the side of the heat exchanger 100 facing the first water tray 200; and along the third direction Z, the sensor 400 is located near the interface end 111 of the heat exchanger 100. In other words, the sensor can be considered to be located in the small space located forward, downward, and to the right of the orientation reference shown in Figure 3 .

[0091] The applicant found that the refrigerant mainly leaked from the interface end 111 of the coil assembly 110. Compared with the prior art solution in which the sensor is directly arranged on the wall of the air-conditioning shell, the sensor 400 in this solution is arranged close to the interface end 111, that is, the distance from the sensor 400 to the interface end 111 is shorter, so the sensor 400 can detect the refrigerant leakage more quickly, thereby ensuring the timeliness of the refrigerant monitoring.

[0092] When a refrigerant leak occurs in the heat exchanger 100, due to the influence of gravity, the refrigerant will be deposited from the coil assembly 110 in the heat exchanger 100 to the first water receiving tray 200 located below the heat exchanger 100. In some embodiments, the sensor 400 is connected to the heat exchanger 100. It can be understood that the sensor 400 can be fixedly connected to the heat exchanger 100 or detachably connected to the heat exchanger 100. Depending on the actual situation, some embodiments of the present application are described by taking the detachable connection between the sensor 400 and the heat exchanger 100 as an example. The sensor 400 is detachably connected to the heat exchanger 100, which facilitates the regular replacement of the sensor 400 and ensures the reliability of the refrigerant monitoring of the sensor 400.

[0093] Referring to Figure 15, further, along the first direction X, the sensor 400 is located between the heat exchanger 100 and the first water receiving tray 200, that is, the leaked refrigerant can first contact the sensor 400 before flowing from the heat exchanger 100 and depositing on the first water receiving tray 200. Therefore, this solution can effectively shorten the distance from the leaked refrigerant to the sensor 400, and further improve the reliability of the refrigerant monitoring of the sensor 400.

[0094] Referring to Figures 17 and 18 , in some embodiments, the heat exchanger 100 includes a protective plate 120 facing the first water receiving tray 200. The protective plate 120 protects the fins within the heat exchanger 100. It is understood that in addition to the protective plate 120 facing the first water receiving tray 200, other protective plates 120 may also be provided. Multiple protective plates 120 together form a cavity capable of accommodating the fins.

[0095] 22 and 23 , a connecting plate 130 is connected to one side of the guard plate 120 adjacent to the interface end 111. The sensor 400 is connected to the wall of the connecting plate 130 facing away from the guard plate 120. The specific connection position of the sensor 400 can be determined according to the actual situation. It can be understood that since the refrigerant mainly leaks from the interface end 111, the sensor 400 is connected to the connecting plate 130 adjacent to the interface end 111. On the one hand, the sensor 400 is kept at a smaller distance from the interface end 111, thereby ensuring the timeliness of monitoring the leaked refrigerant. On the other hand, the connecting plate 130 can also act as a water barrier, that is, it can prevent condensed water from flowing from the heat exchanger 100 to the sensor 400, thereby preventing water from entering the sensor 400 and extending the service life of the sensor 400.

[0096] The first water receiving tray 200 is provided with a first drain outlet 211, and the first drain outlet 211 can discharge the condensed water collected by the first water receiving tray 200 out of the air handling unit 10. The specific setting position of the first drain outlet 211 on the first water receiving tray 200 is introduced below, and the first water receiving tray 200 is defined as having a first side panel 210. The first side panel 210 is a side panel of the first water receiving tray 200 along the third direction Z. With reference to the orientation in Figure 19, when the third direction Z points to the front-to-back direction, the first side panel 210 can be the side panel of the front side of the first water receiving tray 200 along the front-to-back direction, or it can be the side panel of the rear side of the first water receiving tray 200 along the front-to-back direction. Some embodiments of the present application are described by taking the side panel of the front side of the first water receiving tray 200 as the first side panel 210 as an example.

[0097] Referring to Figure 19, the first side panel 210 is provided with a first drain port 211. The first drain port 211 can be set to a variety of shapes. Specifically, the first drain port 211 can be set to a circular, square, trapezoidal or triangular shape, etc., depending on the actual situation. Some embodiments of the present application are described by taking the first drain port 211 as a circular shape as an example. It can be understood that the first drain port 211 can be provided on the lower side of the first side panel 210 along the water receiving depth direction of the first water receiving tray 200 to ensure the removal effect of the condensed water in the first water receiving tray 200, and to avoid excessive condensed water remaining in the first water receiving tray 200 and the condensed water evaporating into the internal circuit of the air handling unit 10. It should be noted that the first drain port 211 can be provided as a single one or as a plurality of ones. Some embodiments of the present application are described by taking the provision of two first drain ports 211 as an example.

[0098] It should be noted that in some embodiments, when two first drain ports 211 are provided, one of the first drain ports 211 may be an overflow port, and the other first drain port 211 may be an outlet port. It is understood that the outlet port is closer to the bottom wall of the first water receiving tray 200 than the overflow port.

[0099] Since the refrigerant is heavier than air, after the refrigerant leaks, the leaked refrigerant will be affected by gravity and deposited on the lower side of the first water receiving pan 200. Therefore, the refrigerant will converge and flow to the first drain port 211, that is, the refrigerant concentration at the first drain port 211 is higher than the refrigerant concentration at other positions of the first water receiving pan 200. No matter where the refrigerant leaks in the heat exchanger 100, the leaked refrigerant will be deposited and flow to the first drain port 211. In this solution, because the sensor 400 is arranged near the first side plate 210, the first side plate 210 is provided with the first drain port 211, that is, the sensor 400 is arranged near the first drain port 211. The sensor 400 of this solution can realize the monitoring of multiple positions of the air handling unit, further improving the reliability of refrigerant monitoring.

[0100] In some embodiments, the heat exchanger 100 includes a coil assembly 110. The coil assembly 110 is used to conduct refrigerant. One end of the coil assembly 110 along the third direction Z is an interface end 111. It should be noted that the third direction Z is perpendicular to the first direction X and the second direction Y. With reference to the orientation of Figure 25, the first direction X can be the left-right direction, the second direction Y can be the up-down direction, and the third direction Z can be the front-to-back direction. When the third direction Z points to the front-to-back direction, in some embodiments, the front end of the coil assembly 110 along the front-to-back direction can be the interface end 111. In other embodiments, the rear end of the coil assembly 110 along the front-to-back direction can be the interface end 111. Some embodiments of the present application are described by taking the front end of the coil assembly 110 along the front-to-back direction as the interface end 111 as an example.

[0101] The following describes the relative positional relationship between the first side panel 210 and the interface end 111 of the coil assembly 110. The first side panel 210 and the interface end 111 are located on the same side of the air handling unit 10 along the third direction Z. Specifically, referring to the orientation of FIG. 19 , the interface end 111 and the first side panel 210 can be located together on the front side of the air handling unit 10.

[0102] In this solution, the sensor 400 is arranged near the first drain outlet 211 of the first side plate 210. Since the first side plate 210 and the interface end 111 are located on the same side, the sensor 400 is also arranged near the interface end 111. Since the refrigerant mainly leaks from the interface end 111, this solution can effectively improve the accuracy of refrigerant monitoring by the sensor 400.

[0103] The following describes the relative positional relationship between the first drain port 211 and the second water receiving pan 300. It will be understood that, with reference to FIG19 , when the air handling unit 10 is installed vertically along the second direction Y (vertical installation), the leaked refrigerant is deposited and gathered in the second water receiving pan 300. With reference to FIG24 , when the air handling unit 10 is installed vertically along the first direction X (horizontal installation), the leaked refrigerant is deposited and gathered in the first water receiving pan 200. In some embodiments, along the second direction Y, with reference to the orientation of FIG22 , that is, along the up-down direction, the first drain port 211 is provided on a side of the first side panel 210 adjacent to the second water receiving pan 300. Since the first drain port 211 is provided on a side of the first side panel 210 adjacent to the first water receiving pan 200, the first drain port 211 is arranged adjacent to both the first water receiving pan 200 and the second water receiving pan 300. Therefore, no matter whether the air handling unit 10 is installed vertically or horizontally, the sensor 400 can timely and accurately monitor the leaking refrigerant, thereby ensuring the reliability of the sensor 400 in monitoring the refrigerant.

[0104] The second water receiving tray 300 is provided with a second drain outlet 311, and the second drain outlet 311 can discharge the condensed water collected by the second water receiving tray 300 out of the air handling unit 10. The specific setting position of the second drain outlet 311 on the second water receiving tray 300 is introduced below, and the second water receiving tray 300 is defined as having a second side panel 310. The second side panel 310 is a side panel of the second water receiving tray 300 along the third direction Z. With reference to the orientation in Figure 19, when the third direction Z points to the front-to-back direction, the second side panel 310 can be the side panel of the front side of the second water receiving tray 300 along the front-to-back direction, or it can be the side panel of the rear side of the second water receiving tray 300 along the front-to-back direction. Some embodiments of the present application are described by taking the side panel of the front side of the second water receiving tray 300 as the second side panel 310 as an example.

[0105] Referring to Figure 19, the second side panel 310 is provided with a second drain outlet 311. The second drain outlet 311 may be the same as the relevant settings of the first drain outlet 211, or may be different. The second drain outlet 311 may be set to a variety of shapes. Specifically, the second drain outlet 311 may also be set to a circular, square, trapezoidal or triangular shape, etc., depending on the actual situation. Some embodiments of the present application are described by taking the second drain outlet 311 as a circular shape as an example. It can be understood that the second drain outlet 311 can be provided on the lower side of the second side panel 310 along the water receiving depth direction of the second water receiving tray 300. It should be noted that the second drain outlet 311 can be provided individually or in multiples. Some embodiments of the present application are described by taking the setting of two second drain outlets 311 as an example.

[0106] This solution provides a second drain port 311 on the second side panel 310 to facilitate timely discharge of condensed water in the second water receiving tray 300, preventing the condensed water from overflowing the water receiving chamber 220 of the second water receiving tray 300 and entering the internal circuit components of the air handling unit 10, thereby ensuring that the air handling unit 10 can continue to operate normally.

[0107] The specific location of the second drain port 311 on the second water receiving pan 300 is described below. In some embodiments, the second drain port 311 is located on the side of the second side plate 310 adjacent to the first water receiving pan 200 along the first direction X. With reference to the orientation in FIG19 , the first direction X is the left-right direction, that is, the second drain port 311 is located on the side of the second side plate 310 adjacent to the first water receiving pan 200 along the left-right direction. Since the first drain port 211 is located on the side of the first side plate 210 adjacent to the second water receiving pan 300, it can be understood that the sensor 400 is arranged adjacent to the first drain port 211 and the second drain port 311, that is, no matter what installation method the air handling unit 10 adopts, the sensor 400 can timely and accurately monitor the refrigerant deposited and gathered in the first drain port 211 or the second drain port 311, thereby ensuring the reliability of refrigerant monitoring.

[0108] The following uses projection to specifically describe the relative placement of sensor 400 and first drain outlet 211. A first projection plane is defined as perpendicular to first direction X. With reference to the orientation in Figure 15 , first direction X can refer to the left-right direction. It will be appreciated that in some embodiments, the first projection plane can be a plane on the air handling unit 10. In other embodiments, the first projection plane can also be a plane outside the air handling unit 10.

[0109] The first drain port 211 forms a first orthographic projection on the first projection plane, and the first orthographic projection forms a closed geometric figure. The sensor 400 forms a second orthographic projection on the first projection plane, and the second orthographic projection forms a closed geometric figure.

[0110] Along the third direction Z, the first orthographic projection and the second orthographic projection at least partially overlap. It should be noted that in some embodiments, the first orthographic projection may partially overlap with the second orthographic projection. In other embodiments, the first orthographic projection may completely overlap with the second orthographic projection. In this solution, the first orthographic projection and the second orthographic projection overlap along the third direction Z, that is, when observed along the third direction Z, the first drain outlet 211 and the sensor 400 are at least partially overlapped. In other words, the sensor 400 is arranged near the first drain outlet 211, that is, the distance from the sensor 400 to the first drain outlet 211 is shorter, and since the leaked refrigerant will be deposited and gathered at the first drain outlet 211, the sensor 400 can directly monitor the leaked refrigerant, thereby further improving the timeliness and accuracy of refrigerant detection.

[0111] In some embodiments, a side panel of the second water receiving tray 300 along the third direction Z is a second side panel 310. Referring to the orientation in FIG. 19 , the front side panel of the second water receiving tray 300 can be the second side panel 310. The second side panel 310 is provided with a second drain port 311. The specific arrangement of the second drain port 311 can be the same as described above and will not be further described here.

[0112] The following uses projection to specifically describe the relative position of the sensor 400 and the second drain outlet 311. The second projection plane is defined as being perpendicular to the third direction Z. With reference to the orientation in FIG19 , the third direction Z may refer to the front-back direction.

[0113] The second drain port 311 forms a third orthographic projection on the second projection plane, and the third orthographic projection forms a closed geometric figure. The sensor 400 forms a fourth orthographic projection on the second projection plane, and the fourth orthographic projection forms a closed geometric figure.

[0114] Along the third direction Z, the third orthographic projection at least partially overlaps with the fourth orthographic projection. In some embodiments, the third orthographic projection may partially overlap with the fourth orthographic projection. In other embodiments, the third orthographic projection may completely overlap with the fourth orthographic projection. In this solution, the third orthographic projection overlaps with the fourth orthographic projection along the third direction Z, that is, when observed along the third direction Z, the second drain outlet 311 and the sensor 400 are at least partially overlapped. That is, the distance from the sensor 400 to the second drain outlet 311 is shorter, and since the leaked refrigerant will be deposited and gathered at the second drain outlet 311, the sensor 400 can monitor the leaked refrigerant faster and more accurately, thereby ensuring the reliability of the refrigerant detection of the sensor 400.

[0115] 1 to 14 , another embodiment of the present application proposes an air handling unit 10 that can ensure the reliability of refrigerant monitoring. It is understandable that the air handling unit 10 can be an indoor unit of an air conditioner or an outdoor unit of an air conditioner. The specific details can be determined based on the actual situation. The embodiment of the present application is described by taking the air handling unit 10 as an indoor unit of an air conditioner as an example. It should be noted that the refrigerant in the embodiment of the present application can be a flammable refrigerant or a non-flammable refrigerant. Some embodiments of the present application are described by taking the refrigerant as a flammable refrigerant as an example. The flammable refrigerant can be R32 or R454B, etc. The specific setting of the refrigerant can refer to the relevant known technology. The air handling unit 10 of the embodiment of the present application is described in detail below. Specifically, the air handling unit 10 includes a heat exchanger 100, a first water receiving tray 200 and a sensor 400.

[0116] 1 and 2 , the heat exchanger 100 is used to exchange heat with the outside air. The heat exchanger 100 includes a coil assembly 110, which is used to conduct refrigerant. The refrigerant circulates inside the coil assembly 110 and adaptively evaporates or condenses to cool or heat the air. Specifically, when the air conditioner is cooling, the refrigerant evaporates in the coil assembly 110 of the indoor unit and absorbs heat, thereby absorbing indoor heat and lowering the indoor temperature. When the air conditioner is heating, the refrigerant condenses in the coil assembly 110 of the indoor unit and releases heat, thereby releasing heat indoors and raising the indoor temperature. The specific configuration of the heat exchanger 100 can refer to relevant known technologies.

[0117] 2 , in order to facilitate the description and understanding of the specific structure of the coil assembly 110, a first direction X is defined. One end of the coil assembly 110 along the first direction X is an interface end 111, and the interface end 111 is used to communicate with the connecting pipe to connect the multiple base pipes in the coil assembly 110 into a whole, thereby realizing the evaporation and cooling of the refrigerant. It can be understood that the connecting pipe can be a U-shaped connecting pipe. The specific direction of the first direction X is introduced below, with reference to the orientation of FIG1 . In some embodiments, the first direction X can be a front-to-back direction, that is, the first direction X can be a direction from front to back, or a direction from back to front. In other embodiments, the first direction X can also be a left-to-right direction, that is, the first direction X can be a direction from left to right, or a direction from right to left. The specific direction of the first direction X may depend on the actual situation. Some embodiments of the present application are described by taking the first direction X as a direction from front to back as an example.

[0118] Referring to Figure 1, in order to facilitate the description and understanding of the arrangement position of the first water receiving tray 200 relative to the heat exchanger 100, a second direction Y is defined. The second direction Y is perpendicular to the first direction X. In some embodiments, when the first direction X is the front-to-back direction, the second direction Y can be the up-and-down direction, and can also be the left-to-right direction. In other embodiments, when the first direction X is the left-to-right direction, the second direction Y can be the front-to-back direction, and can also be the up-and-down direction. Some embodiments of the present application are described by taking the first direction X as the front-to-back direction and the second direction Y as the up-and-down direction as an example. The first water receiving tray 200 is used to hold the condensed water generated by the operation of the heat exchanger 100 when the air handling unit 10 is arranged vertically along the second direction Y.

[0119] Specifically, the first water receiving pan 200 is located on one side of the heat exchanger 100 along the second direction Y. For ease of understanding, the orientation in Figure 1 is used as a reference. In some embodiments, when the second direction Y is the up-down direction, the first water receiving pan 200 can be located on the lower side of the heat exchanger 100 along the up-down direction, or on the upper side of the heat exchanger 100 along the up-down direction. In other embodiments, when the second direction Y is the left-right direction, the first water receiving pan 200 can also be located on the left side of the heat exchanger 100 along the left-right direction, or on the right side of the heat exchanger 100 along the left-right direction. The specific position of the first water receiving pan 200 depends on the actual situation. Some embodiments of the present application are described as follows: the second direction Y points to the up-down direction, and the first water receiving pan 200 is located on the lower side of the heat exchanger 100 along the up-down direction.

[0120] The first drain port 211 can discharge the condensed water collected by the first water receiving tray 200 out of the air handling unit 10. The specific setting position of the first drain port 211 on the first water receiving tray 200 is introduced below, and the first water receiving tray 200 is defined as having a first side panel 210. The first side panel 210 is a side panel of the first water receiving tray 200 along the first direction X. With reference to the orientation in FIG3 , the first side panel 210 can be a side panel on the front side of the first water receiving tray 200 along the front-to-back direction, or it can be a side panel on the rear side of the first water receiving tray 200 along the front-to-back direction. Some embodiments of the present application are described by taking the side panel on the front side of the first water receiving tray 200 as the first side panel 210 as an example. Referring to FIG3 and FIG4 , it should be noted that the first side panel 210 and the interface end 111 are located on the same side along the first direction X in the air handling unit 10, that is, the interface end 111 can be located together with the first side panel 210 on the front side of the air handling unit 10.

[0121] The first side panel 210 is provided with a first drain outlet 211. The first drain outlet 211 can be set to a variety of shapes. Specifically, the first drain outlet 211 can be set to a circular, square, trapezoidal or triangular shape, etc., depending on the actual situation. Some embodiments of the present application are described by taking the first drain outlet 211 as an example of being circular, with reference to FIG9 . It can be understood that the first drain outlet 211 can be provided on the lower side of the first side panel 210 along the second direction Y to ensure the drainage effect of the condensed water in the first water receiving tray 200, to avoid excessive condensed water remaining in the first water receiving tray 200 and the condensed water evaporating into the internal circuit components of the air handling unit 10.

[0122] Referring to Figure 3 , the air handling unit 10 also includes a sensor 400 , which is used to detect refrigerant leakage from the heat exchanger 100 . Specifically, when refrigerant leaks from the heat exchanger 100 , the sensor 400 detects this abnormality and provides feedback to the controller and relevant personnel, enabling them to promptly address the leak, ensuring the heat exchange efficiency of the heat exchanger 100 and eliminating related safety hazards. The specific configuration of the sensor 400 can be referenced to relevant known technologies.

[0123] With reference to Figure 3 , the following definition defines "the sensor 400 is positioned on one side of the interface end 111 of the heat exchanger 100 along the first direction X": a plane perpendicular to the first direction X is defined as a first plane a. The two opposite outermost endpoints of the heat exchanger 100 along the first direction X are equidistant from the first plane a. Along the first direction X, the sensor 400 is positioned on the side of the first plane a facing the interface end 111.

[0124] As can be seen from the above definition, when the sensor 400 is located on the side of the first plane a away from the interface end 111 , then along the first direction X, the sensor 400 is disposed on the side of the heat exchanger 100 away from the interface end 111 .

[0125] With reference to Figures 3 and 4 , the following definition defines "along the second direction Y, the sensor 400 is located on the side of the heat exchanger 100 closest to the first water receiving tray 200": a plane perpendicular to the second direction Y is defined as the second plane b. The distances from the two opposite outermost endpoints of the heat exchanger 100 along the second direction Y to the second plane b are equal. Along the second direction Y, the sensor 400 is located on the side of the second plane b facing the first water receiving tray 200.

[0126] From the above definition, when the sensor 400 is located on the side of the second plane b away from the first water receiving tray 200 , then along the second direction Y, the sensor 400 is disposed on the side of the heat exchanger 100 away from the first water receiving tray 200 .

[0127] In the technical solution of the present application, one end of the coil assembly 110 in the heat exchanger 100 along the first direction X is the interface end 111. The first water receiving pan 200 is located on one side of the heat exchanger 100 along the second direction Y. The first side panel 210 of the first water receiving pan 200 along the first direction X is provided with a first drain outlet 211. The first side panel 210 and the interface end 111 are located on the same side of the air handling unit 10 along the first direction X. The sensor 400 is located on one side of the interface end 111 of the heat exchanger 100 along the first direction X, and on the side of the heat exchanger 100 near the first water receiving pan 200 along the second direction Y. In other words, the sensor 400 is arranged adjacent to both the interface end 111 and the first water receiving pan 200. Compared to the prior art solution in which the sensor is directly arranged on the wall of the air-conditioning housing, the distance from the sensor 400 to the interface end 111 in this solution is shorter. Since the refrigerant mainly leaks from the interface end 111, the arrangement of the sensor 400 near the interface end 111 in this solution can detect the refrigerant leakage more quickly, thereby ensuring the timeliness of the refrigerant monitoring. In addition, since the refrigerant is heavier than air, after the refrigerant leaks, the leaked refrigerant will be affected by gravity and deposited on the lower side at the first water receiving tray 200. Therefore, the refrigerant concentration at the first water receiving tray 200 is relatively high. The arrangement of the sensor 400 near the first water receiving tray 200 in this solution can ensure the accuracy of the refrigerant monitoring. Therefore, the air handling unit 10 of this solution can effectively improve the reliability of refrigerant monitoring, facilitate relevant personnel to deal with refrigerant leakage in a timely manner, and ensure the continued normal operation of the air handling unit 10.

[0128] In some embodiments, to further describe and understand the specific location of the first drain outlet 211, a third direction Z is defined. The third direction Z is perpendicular to the first direction X and the second direction Y. With reference to the orientation of FIG. 3 , when the first direction X is the front-to-back direction, the second direction Y can be the up-down direction, and the third direction Z can be the left-to-right direction.

[0129] 4 and 5 , the first drain port 211 is located on one side of the first side panel 210 along the third direction Z. It is understood that when the third direction Z is the left-right direction, the first drain port 211 can be located on the left side of the first side panel 210 along the left-right direction, or on the right side of the first side panel 210 along the left-right direction. Some embodiments of the present application are described using the example of the first drain port 211 being located on the right side of the first side panel 210 along the left-right direction.

[0130] The applicant discovered that since the refrigerant is heavier than air, after the refrigerant leaks, the leaked refrigerant will be affected by gravity and deposited on the lower side of the first water receiving pan 200. Therefore, the refrigerant will converge and flow to the first drain port 211, that is, the refrigerant concentration at the first drain port 211 is higher than the refrigerant concentration at other positions of the first water receiving pan 200. Regardless of where the refrigerant leaks in the heat exchanger 100, the leaked refrigerant will be deposited and flow to the first drain port 211. In this solution, the Z sensor 400 is arranged on the side of the first drain port 211 adjacent to the first water receiving pan 200 along the third direction, that is, the distance from the sensor 400 to the first drain port 211 is shorter. Therefore, the arrangement of the sensor 400 at this location in this solution can improve the timeliness and accuracy of refrigerant monitoring and realize monitoring of multiple positions of the air handling unit.

[0131] 6 , the relative positions of the sensor 400 and the first drain outlet 211 are described in detail below using projection. A first projection plane is defined as being perpendicular to the first direction X. It will be appreciated that in some embodiments, the first projection plane may be a plane on the air handling unit 10. In other embodiments, the first projection plane may also be a plane outside the air handling unit 10.

[0132] The first drain port 211 forms a first orthographic projection on the first projection plane, and the first orthographic projection forms a closed geometric figure. The sensor 400 forms a second orthographic projection on the first projection plane, and the second orthographic projection forms a closed geometric figure.

[0133] Along the third direction Z, the first orthographic projection and the second orthographic projection at least partially overlap. It should be noted that in some embodiments, the first orthographic projection may partially overlap with the second orthographic projection. In other embodiments, the first orthographic projection may completely overlap with the second orthographic projection. In this solution, the first orthographic projection and the second orthographic projection overlap along the third direction Z, that is, when observed along the third direction Z, the first drain outlet 211 and the sensor 400 are at least partially overlapped. In other words, the sensor 400 is arranged close to the first drain outlet 211, that is, the distance from the sensor 400 to the first drain outlet 211 is shorter, and since the leaked refrigerant will be deposited and gathered at the first drain outlet 211, it is convenient for the sensor 400 to directly monitor the leaked refrigerant, thereby further improving the timeliness and accuracy of refrigerant detection.

[0134] Referring to Figures 7 and 8, in some embodiments, the sensor 400 is connected to the first side plate 210. The sensor 400 can be snap-fitted to the first side plate 210 or bolted to the first side plate 210. The specific connection method and connection position between the sensor 400 and the first side plate 210 can be determined according to actual conditions. In this embodiment, the sensor 400 is provided on the first side plate 210. Since the first side plate 210 is provided with the first drain port 211, the distance between the sensor 400 and the first drain port 211 can be further shortened, thereby ensuring the timeliness and accuracy of refrigerant detection.

[0135] Referring to Figure 7 , in some embodiments, the air handling unit 10 further includes a housing 500 , which prevents foreign matter such as moisture and dust from entering the air handling unit 10, thereby preventing circuit failures. The heat exchanger 100 and the first water tray 200 are both located within the housing 500 . In this embodiment, the sensor 400 is connected to the inner wall of the housing 500 , preventing foreign matter from affecting the normal operation of the sensor 400 and ensuring its continued normal operation.

[0136] 10 , in some embodiments, the first water receiving tray 200 defines a water receiving chamber 220. It will be appreciated that the bottom wall surface of the water receiving chamber 220 on the side away from the first drain port 211 may be higher than the bottom wall surface on the side adjacent to the first drain port 211, meaning that condensed water can flow and gather in the water receiving chamber 220 and be discharged through the first water receiving port 230 of the first water receiving tray 200.

[0137] The sensor 400 is connected to the side wall of the first side plate 210 facing away from the water receiving chamber 220. The sensor 400 can be located at the upper, middle, or lower portion of the side wall along the second direction Y. The specific location of the sensor 400 depends on the actual situation. It is understood that since condensed water may remain in the water receiving chamber 220, the present solution of locating the sensor 400 on the side wall of the first side plate 210 facing away from the water receiving chamber 220 can prevent water from directly entering the sensor 400, prevent sensor 400 from malfunctioning, and ensure that the sensor 400 can continuously and stably monitor refrigerant leakage.

[0138] Referring to Figure 12 , in some embodiments, the sensor 400 is provided with an opening 410 for receiving the refrigerant. Specifically, the refrigerant can come into contact with the identification module of the sensor 400 through the opening 410 to monitor and identify the refrigerant. The opening 410 of the sensor 400 can be circular, square, or other polygonal in shape, and the specific shape and size of the opening 410 depends on the actual situation.

[0139] The specific arrangement of the opening 410 of the sensor 400 is described below. It should be noted that the first direction X and the second direction Y mentioned below have the same meaning as the directions above and will not be repeated here. In some embodiments, along the second direction Y, the opening 410 may extend beyond the edge of the first side plate 210 adjacent to the heat exchanger 100. In other words, the opening 410 of the sensor 400 may be arranged to protrude from the edge of the first side plate 210, that is, the refrigerant may contact the opening 410 before the first side plate 210 when flowing. Therefore, the sensor 400 can detect the leaking refrigerant in a shorter time, which can further improve the timeliness of the refrigerant detection. In other embodiments, along the second direction Y, the opening 410 may be flush with the edge of the first side plate 210 adjacent to the heat exchanger 100. In other embodiments, along the second direction Y, the edge of the first side plate 210 adjacent to the heat exchanger 100 may extend beyond the opening 410. The specific situation may depend on the actual situation. In some embodiments of the present application, an example is given in which the opening 410 extends beyond the edge of the first side plate 210 adjacent to the heat exchanger 100 along the second direction Y.

[0140] Along the first direction X, the opening 410 of the sensor 400 is arranged toward the water receiving chamber 220. Compared to arrangements where the opening 410 of the sensor 400 is arranged away from the water receiving chamber 220, leaked refrigerant can enter the opening 410 along a shorter path. This means that the sensor 400 can detect and identify leaked refrigerant in a shorter time, further improving the timeliness of refrigerant monitoring.

[0141] 7 , in some embodiments, the coil assembly 110 includes a diverter pipe 112 , which is located at the interface end 111 of the coil assembly 110 , i.e., the diverter pipe 112 is located on one side of the coil assembly 110 along the first direction X. The diverter pipe 112 is used to divert the refrigerant within the coil assembly 110 , so that the refrigerant at multiple locations within the coil assembly 110 can be evaporated and cooled simultaneously, thereby improving heat exchange efficiency and ensuring heat exchange effects.

[0142] The specific arrangement of the diverter pipe 112 is described below. The diverter pipe 112 includes a first diverter assembly 1121 located on the side of the sensor 400 facing away from the water receiving tray. Observed along the second direction Y, with reference to the orientation of FIG. 7 , and observed from bottom to top, the first diverter assembly 1121 at least partially overlaps with the sensor 400. Specifically, in some embodiments, the sensor 400 may partially overlap with the first diverter assembly 1121. In other embodiments, the sensor 400 may also completely overlap with the first diverter assembly 1121. It is understood that the first diverter assembly 1121 may be spaced apart from the sensor 400 along the second direction Y.

[0143] 10 to 14 , the air handling unit 10 further includes a water retaining portion 600, which can retain water for the sensor 400. Specifically, the water retaining portion 600 is disposed between the first diverter assembly 1121 and the sensor 400, and the specific location of the water retaining portion 600 depends on the structure of the sensor 400. The water retaining portion 600 can capture condensed water dripping from the first diverter assembly 1121 toward the sensor 400. By disposing the water retaining portion 600 between the first diverter assembly 1121 and the sensor 400, this solution can effectively inhibit condensed water from contacting the sensor 400, prevent condensed water from entering the sensor 400 and causing equipment failure, and extend the service life of the sensor 400.

[0144] With reference to Figures 10 to 12, the relative arrangement relationship between the water retaining portion 600 and the sensor 400 is described below. In some embodiments, the water retaining portion 600 can be sleeved on the end of the sensor 400 facing the first diverter assembly 1121. It can be understood that an accommodating cavity can be provided inside the water retaining portion 600, and the end of the first diverter assembly facing the sensor 400 can be accommodated in the accommodating cavity to achieve assembly connection. In other embodiments, the water retaining portion 600 can also be detachably connected to the end of the sensor 400 facing the first diverter assembly 1121. Some embodiments of the present application are described by taking the end of the sensor 400 facing the first diverter assembly 1121 as an example in which the water retaining portion 600 is sleeved.

[0145] It can be understood that along the relative arrangement direction of the first diversion component 1121 and the sensor 400, the water retaining portion 600 can completely cover the entire sensor 400, or it can only cover the end of the sensor 400 facing the first diversion component 1121. Some embodiments of the present application take the water retaining portion 600 completely covering the sensor 400 as an example.

[0146] In this solution, the sensor 400 is installed in the water retaining part 600, that is, the condensed water generated by heat exchange can flow to the water retaining part 600 along the first diversion component 1121 and converge at the water retaining part 600, thereby preventing the condensed water from flowing along the first diversion component 1121 to the sensor 400, thereby improving the waterproof performance, and the water retaining part 600 and the sensor 400 are easy to install and disassemble, which can ensure assembly efficiency.

[0147] 12 to 14 , in some embodiments, the water retaining portion 600 includes a water guiding end 610, which is used to guide the condensed water in the water retaining portion 600. That is, after the water retaining portion 600 receives the condensed water dripping from the first diversion component 1121 toward the sensor 400, this part of the condensed water can be guided out by the water guiding end 610 to prevent the condensed water from overflowing the water retaining portion 600 and flowing toward the sensor 400 and other circuit components.

[0148] The first water receiving tray 200 defines a water receiving chamber 220, which collects and discharges condensed water generated by heat exchange through the first drain port 211. It will be appreciated that the opening of the water receiving chamber 220 faces the heat exchanger 100. When viewed along the second direction Y, the water guide end 610 overlaps with the water receiving chamber 220. In other words, the water guide end 610 and the water receiving chamber 220 overlap along the second direction Y. This means that condensed water received by the water retaining portion 600 can flow from the water guide end 610 to the water receiving chamber 220 along the second direction Y.

[0149] By setting a water guide end 610, this solution can guide the condensed water collected by the water retaining part 600 to the first water receiving tray 200 and then discharge it, thereby preventing excessive accumulation of condensed water in the water retaining part 600 and overflowing into the sensor 400 or other circuit components, improving the waterproof performance, and ensuring that the sensor 400 can continue to operate normally.

[0150] Referring to Figures 7 and 8, in some embodiments, the sensor 400 is connected to the first water receiving tray 200, and an insulating portion 420 is provided between the sensor 400 and the first water receiving tray 200. The insulating portion 420 may be a sponge, for example. One side of the insulating portion 420 is connected to the first water receiving tray 200, and the other side is connected to the sensor 400. It is understood that in some embodiments, the insulating portion 420 may be bonded or snapped onto the first water receiving tray 200. In other embodiments, the insulating portion 420 may be bonded or snapped onto the sensor 400, depending on the actual situation. It should be noted that the specific coverage area and thickness of the insulating portion 420 may be determined based on the actual situation. By providing the insulating portion 420, this solution can effectively suppress the transfer of heat from the sensor 400 to the first water receiving tray 200, prevent the sensor 400 from transferring cold and generating condensation, improve the waterproof performance of the sensor 400, and further enhance the reliability of the refrigerant monitoring by the sensor 400.

[0151] Referring to Figure 10 , in some embodiments, the air handling unit 10 includes a control assembly 700 . It will be appreciated that the control assembly 700 may include, for example, a control panel and a control unit. The control panel is the user interface for interacting with the air conditioner. Through the control panel, parameters such as temperature, humidity, or wind speed can be adjusted, and different operating modes can be selected. The control unit receives data from the various sensors 400 and performs control based on the set parameters.

[0152] 10 and 11 , the air handling unit 10 further includes a wiring harness 800 , which is used to power the control assembly 700 and the sensor 400 . Specifically, the wiring harness 800 is electrically connected to the control assembly 700 and the sensor 400 .

[0153] Along the second direction Y, the control assembly 700 is located on the side of the sensor 400 facing away from the first water receiving pan 200. In other words, the sensor 400 is located between the first water receiving pan 200 and the control assembly 700. Therefore, condensed water generated by the heat exchanger 100 can flow unimpeded to the first water receiving pan 200. This means that the condensed water does not come into contact with the control assembly 700, eliminating the risk of water intrusion into the control assembly 700 and ensuring the continued normal operation of the air handling unit 10.

[0154] The wiring harness 800 includes a first connecting segment 810, which is connected to the sensor 400. Specifically, one end of the first connecting segment 810 is electrically connected to the sensor 400, while the other end extends away from the control assembly 700 and away from the sensor 400. The specific extension length of the first connecting segment 810 can be determined based on actual conditions. Referring to the orientation shown in Figure 11, the end of the first connecting segment 810 facing away from the sensor 400 is arranged diagonally downward. In other words, the end of the first connecting section 810 facing away from the sensor 400 is lower than the arrangement position of the sensor 400. Therefore, when the condensed water flows downward along the wiring harness 800 due to gravity, a breakpoint will be formed at the end of the first connecting section 810 facing away from the sensor 400. The condensed water can flow along the breakpoint to the first water receiving tray 200, which can prevent the condensed water from flowing along the first connecting section 810 of the wiring harness 800 to the heat exchanger 100, further reducing the risk of water ingress into the sensor 400, improving the waterproof performance, and ensuring that the sensor 400 can continuously and normally monitor the refrigerant.

[0155] 11 , in some embodiments, the wiring harness 800 further includes a second connecting segment 820, which is connected to the control assembly 700. The extension length of the second connecting segment 820 can be equal to or different from the extension length of the first connecting segment 810, depending on the actual situation. Some embodiments of the present application are described using the example where the second connecting segment 820 is longer than the first connecting segment 810.

[0156] One end of the second connecting segment 820 is electrically connected to the control assembly 700. Specifically, the second connecting segment 820 can be plugged into the control assembly 700. The other end of the second connecting segment 820 is electrically connected to the first connecting segment 810. It is understood that the second connecting segment 820 can be arranged integrally with the first connecting segment 810 or separately. In some embodiments of the present application, the first connecting segment 810 and the second connecting segment 820 are arranged integrally as an example.

[0157] The air handling unit 10 also includes a hook, which is used to fix the wire harness 800 to prevent the wire harness 800 from shaking significantly inside the air handling unit 10, and to ensure the stability of the connection between the wire harness 800, the control component 700 and the sensor 400. The specific structure of the hook depends on the actual situation. The hook is connected to the heat exchanger 100. It can be understood that the hook can be detachably connected to the heat exchanger 100. When the clamping part of the hook is loose, making the stability of the connection between the hook and the wire harness 800 worse, the hook can be replaced in time. When multiple wire harnesses 800 need to be tightened at the same time, a large-sized hook can also be replaced to ensure the tightness of the clamping of the multiple wire harnesses 800. It should be noted that a single hook can be provided, or multiple hooks can be provided.

[0158] Referring to Figure 11 , the following describes the specific arrangement of the wiring harness 800 and the hook. The hook engages the interface 830 between the first connecting section 810 and the second connecting section 820, allowing the first connecting section 810 and the second connecting section 820 to be routed at a specific location. This optimizes the internal layout of the air handling unit 10 and forms a stable water flow breakpoint at the end of the first connecting section 810 facing away from the sensor 400, preventing condensed water from flowing along the first connecting section 810 of the wiring harness 800 to the sensor 400, improving waterproof performance and ensuring the reliability of the monitoring by the sensor 400.

[0159] 7 and 9 , the air handling unit 10 of the embodiment of the present application can be installed vertically (vertically arranged along the second direction Y) or horizontally (vertically arranged along the third direction Z), and can be adapted to a variety of application scenarios. Due to the different installation methods of the air handling unit 10, there will also be differences in the position setting of the water receiving tray of the air handling unit 10. In some embodiments, the air handling unit 10 is equipped with a second water receiving tray 300 to cope with the different installation methods of the air handling unit 10. It can be understood that the second water receiving tray 300 has the same function as the first water receiving tray 200.

[0160] Referring to Figure 7 , it should be noted that in some embodiments, when the air handling unit 10 is installed vertically, condensed water can be collected via the first water receiving tray 200. Referring to Figure 9 , in other embodiments, when the air handling unit 10 is installed horizontally, condensed water can be collected via the second water receiving tray 300. It will be understood that both the first water receiving tray 200 and the second water receiving tray 300 must be located at the lower vertical portion of the air handling unit 10 during water collection.

[0161] To facilitate description and understanding of the placement of the second drain pan 300 relative to the heat exchanger 100, a third direction Z is defined. This third direction Z is identical to the third direction Z described above and will not be further described here. The third direction Z is perpendicular to the first direction X and the second direction Y. Using the orientation of Figure 7 as a reference, the first direction X can be the front-to-back direction, the second direction Y can be the up-down direction, and the third direction Z can be the left-to-right direction.

[0162] The specific location of the second water receiving tray 300 is described below. The second water receiving tray 300 is located on one side of the heat exchanger 100 along the third direction Z. With reference to the orientation of FIG7 (the air handling unit 10 is installed vertically), the second water receiving tray 300 can be located on the left side of the heat exchanger 100 along the left-right direction, or on the right side of the heat exchanger 100 along the left-right direction. Some embodiments of the present application are described using the example of the second water receiving tray 300 being located on the right side of the heat exchanger 100 along the left-right direction. It can be understood that when the air handling unit 10 is installed horizontally, the second water receiving tray 300 is located on the lower side of the air handling unit 10 in the vertical direction.

[0163] This solution provides a second water receiving tray 300, that is, no matter whether the air handling unit 10 is installed vertically along the second direction Y or the third direction Z, there is a water receiving tray to hold condensed water, which can ensure the waterproof performance of the air handling unit 10 and expand the application range of the air handling unit 10.

[0164] Referring to Figure 7, when the air handling unit 10 is installed vertically along the second direction Y, the leaked refrigerant is deposited and gathered in the first water receiving pan 200. Referring to Figure 9, when the air handling unit 10 is installed vertically along the third direction Z, the leaked refrigerant is deposited and gathered in the second water receiving pan 300. In some embodiments, the first drain port 211 is provided on the side of the first side plate 210 adjacent to the second water receiving pan 300, and since the first drain port 211 is provided on the side of the first side plate 210 adjacent to the first water receiving pan 200, the first drain port 211 is arranged adjacent to both the first water receiving pan 200 and the second water receiving pan 300. Therefore, regardless of whether the air handling unit 10 is installed vertically or horizontally, the sensor 400 can promptly and accurately detect the leaked refrigerant, thereby ensuring the reliability of the sensor 400 in monitoring the refrigerant.

[0165] In some embodiments, the second water receiving tray 300 includes a second side panel 310, and the second side panel 310 and the first side panel 210 are located on the same side of the air handling unit 10 along the first direction X. With reference to the orientation in FIG10 , when the first side panel 210 is the front side panel of the first water receiving tray 200 along the front-to-back direction, the second side panel 310 may be the side panel of the second water receiving tray 300 closer to the front side along the front-to-back direction. When the first side panel 210 is the rear side panel of the first water receiving tray 200 along the front-to-back direction, the second side panel 310 may be the side panel of the second water receiving tray 300 closer to the rear side along the front-to-back direction. Some embodiments of the present application are described using the former (the first side panel 210 is the front side panel of the first water receiving tray 200, and the second side panel 310 is the front side panel of the second water receiving tray 300) as an example.

[0166] Referring to Figure 11, the second side panel 310 is provided with a second drain outlet 311. The setting of the second drain outlet 311 may be the same as or different from the first drain outlet 211. The second drain outlet 311 may be provided singly or in plurality. Some embodiments of the present application are described by taking the example that the first drain outlet 211 and the second drain outlet 311 are provided in the same manner and two are provided for each. It can be understood that the second drain outlet 311 may be provided on the lower side of the second side panel 310 along the depth direction of its water receiving chamber 220 to ensure the removal effect of the condensed water in the second water receiving tray 300.

[0167] This solution provides a second drain port 311 on the second side panel 310 to facilitate timely discharge of condensed water in the second water receiving tray 300, preventing the condensed water from overflowing the water receiving chamber 220 of the second water receiving tray 300 and entering the internal circuit of the air handling unit 10, thereby ensuring that the air handling unit 10 can continue to operate normally.

[0168] The specific location of the second drain port 311 on the second water receiving pan 300 is described below. In some embodiments, the second drain port 311 is located on the side of the second side plate 310 adjacent to the first water receiving pan 200 along the second direction Y. With reference to the orientation in FIG10 , the second direction Y is the up-down direction, that is, the second drain port 311 is located on the side of the second side plate 310 adjacent to the first water receiving pan 200 along the up-down direction. Since the first drain port 211 is located on the side of the first side plate 210 adjacent to the second water receiving pan 300. Therefore, it can be understood that the sensor 400 is arranged adjacent to the first drain port 211 and the second drain port 311, that is, no matter what installation method the air handling unit 10 adopts, the sensor 400 can timely and accurately monitor the refrigerant deposited and gathered in the first drain port 211 or the second drain port 311, thereby ensuring the reliability of refrigerant monitoring.

[0169] The following uses projection to specifically illustrate the relative position of sensor 400 and second drain outlet 311. The second projection plane is defined as perpendicular to the third direction Z. With reference to the orientation in Figure 10, the third direction Z can refer to the left and right directions. It will be appreciated that in some embodiments, the second projection plane can be a plane on the air handling unit 10. In other embodiments, the second projection plane can also be a plane outside the air handling unit 10.

[0170] The second drain port 311 forms a third orthographic projection on the second projection plane, and the third orthographic projection forms a closed geometric figure. The sensor 400 forms a fourth orthographic projection on the second projection plane, and the fourth orthographic projection forms a closed geometric figure.

[0171] Along the first direction X, the third orthographic projection at least partially overlaps with the fourth orthographic projection. In some embodiments, the third orthographic projection may partially overlap with the fourth orthographic projection. In other embodiments, the third orthographic projection may completely overlap with the fourth orthographic projection. In this solution, the third orthographic projection overlaps with the fourth orthographic projection along the first direction X, that is, when observed along the first direction X, the second drain outlet 311 and the sensor 400 are arranged to overlap at least partially. That is, the distance from the sensor 400 to the second drain outlet 311 is shorter, and since the leaked refrigerant will be deposited and gathered at the second drain outlet 311, the sensor 400 can detect the leaked refrigerant faster and more accurately, thereby ensuring the reliability of the refrigerant detection of the sensor 400.

[0172] 7 , in some embodiments, the coil assembly 110 includes a diverter pipe 112 located at the interface end 111 of the coil assembly 110. The diverter pipe 112 is used to divert the refrigerant within the coil assembly 110 so that the refrigerant at multiple locations within the coil assembly 110 evaporates and cools simultaneously, thereby improving heat exchange efficiency and ensuring heat exchange effects.

[0173] The diverter pipe 112 includes a first diverter assembly 1121, which is located on the side of the sensor 400 facing away from the water tray. When viewed along the second direction Y, as viewed from top to bottom with reference to FIG. 7 , the first diverter assembly 1121 at least partially overlaps with the sensor 400. It should be noted that the sensor 400 may partially or completely overlap with the first diverter assembly 1121. It is understood that the first diverter assembly 1121 may be spaced apart from the sensor 400 along the second direction Y.

[0174] The diverter pipe 112 also includes a second diverter assembly 1122. Along the third direction Z, the second diverter assembly 1122 is located on the side of the sensor 400 facing away from the second water receiving tray 300. When the third direction Z refers to the left-right direction, that is, when viewed from left to right, the sensor 400 is located between the second diverter assembly 1122 and the second water receiving tray 300. It will be appreciated that the addition of the second diverter assembly 1122 can further enhance the diverter effect.

[0175] The following describes the spatial arrangement of the sensor 400, the first flow diversion assembly 1121, and the second flow diversion assembly 1122. When viewed along the third direction Z, the sensor 400 and the second flow diversion assembly 1122 do not overlap. When the third direction Z refers to the left-to-right direction, that is, when viewed from left to right, the sensor 400 and the second flow diversion assembly 1122 do not overlap.

[0176] In this solution, when observed along the second direction Y, the first diverter component 1121 overlaps with the sensor 400, and when observed along the third direction Z, the sensor 400 does not overlap with the second diverter component 1122, that is, the first diverter component 1121, the second diverter component 1122 and the sensor 400 are spatially staggered. This can effectively prevent condensed water from dripping from the first diverter component 1121 to the second diverter component 1122 and then flowing from the second diverter component 1122 to the sensor 400, eliminate the risk of water ingress into the sensor 400, ensure that the sensor 400 can continuously and normally monitor the refrigerant, and further improve the reliability of the monitoring by the sensor 400.

[0177] Referring to Figures 26 to 32 , another embodiment of the present application provides a water tray assembly 101. The water tray assembly 101 can be used in an air handling unit 10. It should be noted that the air handling unit 10 can be an indoor or outdoor air conditioner. The specific configuration depends on the actual situation. The embodiments of the present application illustrate the air handling unit 10 as an indoor air conditioner. It will be understood that the air handling unit 10 includes a heat exchanger 100. Heat exchanger 100 is used to exchange heat with the outside air. Referring to Figure 28 , heat exchanger 100 includes a coil assembly 110, which is used to conduct refrigerant. The refrigerant circulates within the coil assembly 110 and adaptively evaporates or condenses to cool or heat the air. Specifically, during cooling, the refrigerant evaporates in the coil assembly 110 of the indoor unit, absorbing heat and lowering the indoor temperature. During heating, the refrigerant condenses in the coil assembly 110 of the indoor unit, releasing heat and raising the indoor temperature. The specific configuration of the heat exchanger 100 may refer to relevant known technologies.

[0178] It should be noted that the refrigerant in the embodiments of the present application can be either a flammable or non-flammable refrigerant. Some embodiments of the present application are described using a flammable refrigerant as an example. The flammable refrigerant can be R32 or R454B, for example. The specific configuration of the refrigerant can refer to relevant known technologies. The following is a detailed description of the water tray assembly 101 of the embodiments of the present application. Specifically, the water tray assembly 101 includes a first water tray 200 and a sensor 400.

[0179] 26 to 28 , the first water receiving tray 200 is used to hold condensed water generated by the heat exchanger 100 when the air handling unit 10 is operating. The outer contour of the first water receiving tray 200 can be annular, depending on the actual structure of the heat exchanger 100. The first water receiving tray 200 has a water receiving chamber 220, which can be single or multiple. Some embodiments of the present application are described using two water receiving chambers 220 as an example. It is understood that the condensed water generated by the heat exchange of the heat exchanger 100 can flow and converge into the water receiving chamber 220, preventing moisture from entering the circuit within the air handling unit 10 and causing malfunctions.

[0180] Referring to Figure 26 , the first water receiving tray 200 further includes a water inlet 230. The water inlet 230 can be annular, elliptical, or elongated, depending on the structure of the heat exchanger 100. Some embodiments of this application illustrate an annular water inlet 230 as an example. It will be understood that the water inlet 230 is in communication with the water receiving chamber 220, meaning that condensed water generated by heat exchange in the heat exchanger 100 can flow from the water inlet 230 into the water receiving chamber 220.

[0181] The positional relationship between the water inlet 230 and the first water receiving tray 200 is described in detail below. The water inlet 230 is located on one side of the first water receiving tray 200 along the first direction X. With reference to the orientation of FIG. 26 , in some embodiments, the first direction X may be an up-down direction, and the water inlet 230 is located on the upper or lower side of the first water receiving tray 200 along the up-down direction. In other embodiments, the first direction X may be a left-right direction, and the water inlet 230 is located on the left or right side of the first water receiving tray 200 along the left-right direction. In other embodiments, the first direction X may be a front-to-back direction, and the water inlet 230 is located on the front or rear side of the first water receiving tray 200 along the front-to-back direction. Some embodiments of the present application are described using the example where the first direction X points in the up-down direction and the water inlet 230 is located on the lower side of the first water receiving tray 200 along the up-down direction.

[0182] The first water receiving tray 200 is provided with a first drain port 211, that is, condensed water collected in the first water receiving tray 200 can be discharged from the air handling unit 10 through the first drain port 211. The specific location of the first drain port 211 on the first water receiving tray 200 is described below. The first water receiving tray 200 is defined as having a first side panel 210. The first side panel 210 is a side panel of the first water receiving tray 200 along the second direction Y, where the second direction Y is perpendicular to the first direction X. With reference to the orientation in FIG. 26 , in some embodiments, when the first direction X is the up-down direction, the second direction Y can be the left-right direction, that is, the first side panel 210 can be the left side panel of the first water receiving tray 200 along the left-right direction, or the right side panel of the first water receiving tray 200 along the left-right direction. In other embodiments, when the first direction X is the up-down direction, the second direction Y may also be the front-to-back direction, that is, the first side panel 210 may be the side panel on the front side of the first water receiving tray 200 along the front-to-back direction, or may be the side panel on the rear side of the first water receiving tray 200 along the front-to-back direction. Some embodiments of the present application are described by taking the example that the first direction X indicates the up-down direction and the second direction Y indicates the left-to-right direction.

[0183] Referring to Figure 28, the first side panel 210 is provided with a first drain port 211 connected to the water receiving chamber 220. The first drain port 211 can be set to a variety of shapes. Specifically, the first drain port 211 can be set to a circular, square, trapezoidal or triangular shape, etc., which can be determined according to the actual situation. Some embodiments of the present application are described by taking the first drain port 211 as a circular shape as an example. In some embodiments, the first drain port 211 can be set to a single one. In other embodiments, the first drain port 211 can be multiple. Some embodiments of the present application are described by taking the setting of two first drain ports 211 as an example. It can be understood that the first drain port 211 can be provided on the lower side of the first side panel 210 along the first direction X to ensure the removal effect of the condensed water in the first water receiving tray 200, to avoid the situation where too much condensed water remains in the first water receiving tray 200 and the condensed water evaporates and enters the internal circuit of the air handling unit 10.

[0184] Referring to Figure 26 , the drain pan assembly 101 also includes a sensor 400 , which is used to detect refrigerant leaks from the heat exchanger 100 . Specifically, when refrigerant leaks from the heat exchanger 100 , the sensor 400 detects this abnormality and provides feedback to the controller and relevant personnel, enabling them to promptly address the leak, ensuring the heat exchange efficiency of the heat exchanger 100 and eliminating related safety hazards. The specific configuration of the sensor 400 can be referenced to relevant known technologies.

[0185] The sensor 400 is connected to the wall of the first water receiving tray 200 facing away from the water receiving chamber 220. This prevents condensed water in the water receiving chamber 220 from contacting the sensor 400, ensuring the sensor 400's waterproofing. It should be noted that the outer wall of the first water receiving tray 200 facing away from the water receiving chamber 220 can be the wall of the first side plate 210 facing away from the water receiving chamber 220 and the walls connected to it along the outer circumference of the first water receiving tray 200 (see Figure 26 , there are four such outer walls); or the wall of the third side plate 270 facing away from the water receiving chamber 220 and the walls connected to it along the inner circumference of the first water receiving tray 200 (see Figure 26 , there are four such outer walls); or the bottom walls of the two troughs of the first water receiving tray 200 facing away from the water receiving chamber 220. The specific orientation of the outer wall depends on the actual situation.

[0186] With reference to the orientation in FIG. 26 , in some embodiments, the sensor 400 can be disposed on the outer wall of the first water receiving tray 200 that faces away from the water receiving chamber 220. In other embodiments, the sensor 400 can be disposed on the inner wall of the first water receiving tray 200 that faces away from the water receiving chamber 220. Some embodiments of the present application are described using the example of the sensor 400 being disposed on the inner wall of the first water receiving tray 200 that faces away from the water receiving chamber 220.

[0187] The following defines "the sensor 400 is located on one side of the first side plate 210 of the first water receiving tray 200 along the second direction Y": a plane perpendicular to the second direction Y is defined as a first plane a. The two opposite outermost endpoints of the first water receiving tray 200 along the second direction Y are equidistant from the first plane a. Along the second direction Y, the sensor 400 is located on the side of the first plane a facing the first side plate 210.

[0188] From the above definition, when the sensor 400 is located on the side of the first plane a away from the first side plate 210 , then along the first direction X, the sensor 400 is disposed on the side of the first water receiving tray 200 away from the first side plate 210 .

[0189] In the technical solution of the present application, the water receiving tray assembly 101 includes a first water receiving tray 200 and a sensor 400. The first water receiving tray 200 includes a water receiving chamber 220 and a water receiving port 230. The sensor 400 is connected to the wall of the first water receiving tray 200 facing away from the water receiving chamber 220, which can prevent the condensed water in the water receiving chamber 220 from contacting the sensor 400 and prevent the risk of water intrusion into the sensor 400. Compared with the solution in the prior art in which the sensor is directly arranged on the wall of the air-conditioning housing, in this solution, along the second direction Y, the sensor 400 is located on one side of the first side plate 210 of the first water receiving tray 200, that is, the sensor 400 is arranged adjacent to the first side plate 210, and the first side plate 210 is provided with a first drain port 211 connected to the water receiving chamber 220, that is, the sensor 400 of this solution is arranged adjacent to the first drain port 211. Because refrigerant is heavier than air, if a refrigerant leak occurs, the leaked refrigerant will be affected by gravity and deposited downward on the first water receiving pan 200, where it will converge and flow to the first drain outlet 211. Therefore, the sensor 400 of this solution can effectively improve the reliability of refrigerant monitoring, facilitate relevant personnel to promptly handle refrigerant leaks, and ensure the continued normal operation of the air handling unit 10.

[0190] The following describes in detail the location of the sensor 400 on the first water receiving tray 200. In some embodiments, the first water receiving tray 200 is provided with a bottom wall 240 opposite the water receiving port 230 along the first direction X. With reference to the orientation of FIG. 26 , the first water receiving tray 200 is provided with a bottom wall 240 opposite the water receiving port 230 along the vertical direction. Specifically, when the water receiving port 230 is located on the upper side of the first water receiving tray 200 along the vertical direction, the bottom wall 240 can be located on the lower side of the first water receiving tray 200 along the vertical direction. It is understood that the bottom wall 240 can be the outer wall of the first water receiving tray 200 opposite the water receiving port 230, or the inner wall of the first water receiving tray 200 opposite the water receiving port 230. Some embodiments of the present application are described using the example of the bottom wall 240 being the outer wall of the first water receiving tray 200 opposite the water receiving port 230.

[0191] The meaning of “along the first direction X, the sensor 400 is located between the water inlet 230 and the bottom wall 240 ” is explained below, that is, when observed in a direction perpendicular to the first direction X, the water inlet 230 is located on one side of the sensor 400 , and the bottom wall 240 is located on the other side of the sensor 400 away from the water inlet 230 .

[0192] In some embodiments, the sensor 400 can be located on the side of the first water receiving tray 200 near the bottom wall 240. In other embodiments, the sensor 400 can also be located on the side of the first water receiving tray 200 away from the bottom wall 240. In other embodiments, the sensor 400 can also be located directly between the bottom wall 240 and the water receiving port 230 of the first water receiving tray 200. Some embodiments of the present application are described using the example of the sensor 400 being located on the side of the first water receiving tray 200 near the bottom wall 240.

[0193] In this solution, along the first direction X, the sensor 400 is located between the water inlet 230 and the bottom wall 240, which can avoid interference between the sensor 400 and other components in the air handling unit 10, optimize the spatial layout of the air handling unit 10, and prevent condensed water from entering the sensor 400.

[0194] 26 and 27 , in some embodiments, the first water tray 200 further defines an air duct 250, which serves as an airflow channel for the air handling unit 10 to exchange air with the outside air. It is understood that the air duct 250 may be provided with multiple air outlets to ensure effective airflow exchange within the air handling unit 10. It should be noted that the air duct 250 may be provided with a filter assembly, which can prevent large external impurities from entering the air handling unit 10, thereby extending the service life of the air handling unit 10 and ensuring continued normal operation of the air handling unit 10.

[0195] The relative positional relationship between the water receiving chamber 220 and the air duct 250 is introduced below. Specifically, the water receiving chamber 220 is arranged around the air duct 250. It can be understood that the water receiving chamber 220 can be arranged partially around the air duct 250, or it can be arranged completely around the air duct 250. Some embodiments of the present application are described by taking the arrangement of the water receiving chamber 220 completely around the air duct 250 as an example. The first water receiving tray 200 also includes an inner peripheral wall surface 260, which is the wall surface of the first water receiving tray 200 close to the water receiving chamber 220. The inner peripheral wall surface 260 can be connected to the bottom wall 240 of the first water receiving tray 200. It should be noted that the inner peripheral wall surface 260 can define the air duct 250.

[0196] In this solution, the sensor 400 is connected to the inner wall 260 of the air duct 250, that is, the sensor 400 is arranged near the air duct 250. Compared with the solution in which the sensor is arranged inside the air duct, on the one hand, the sensor 400 of this solution will not hinder the circulation of gas, and can ensure the normal gas exchange inside the air handling unit 10. On the other hand, this solution can also prevent the circulating gas from disturbing the refrigerant and leaking, thereby ensuring the reliability of the sensor 400 in monitoring the leaked refrigerant.

[0197] The following describes in detail the placement of the sensor 400 on the first water receiving tray 200. In some embodiments, the first water receiving tray 200 further includes a third side panel 270. The third side panel 270 and the first side panel 210 are arranged opposite and spaced apart along the second direction Y. With reference to the orientation in Figure 26, when the first direction X points in the up-down direction and the second direction Y points in the left-right direction, the third side panel 270 and the first side panel 210 are arranged opposite and spaced apart along the left-right direction. Specifically, the first side panel 210 can be the side panel on the left side of one end of the first water receiving tray 200 along the left-right direction, and the third side panel 270 can be the side panel on the right side of one end of the first water receiving tray 200 along the left-right direction. It should be noted that the air duct 250 can be located between the first side panel 210 and the third side panel 270. That is, the specific spacing between the first side panel 210 and the third side panel 270 can determine the spatial volume of the air duct 250.

[0198] The first water receiving tray 200 also includes a fourth side panel 280. To facilitate description and understanding of the positional relationship between the fourth side panel 280 and the third side panel 270, a third direction Z is defined. The fourth side panel 280 is located on one side of the third side panel 270 along the third direction Z, and the third direction Z is perpendicular to the first direction X and the second direction Y. With reference to the orientation in Figure 26, in some embodiments, when the first direction X points to the up-down direction, the second direction Y can point to the left-right direction, and the third direction Z can point to the front-back direction, that is, the fourth side panel 280 can be a side panel located near the front side of the third side panel 270 along the front-back direction, or it can be a side panel located near the rear side of the third side panel 270 along the front-back direction. Some embodiments of the present application are described using the example of the fourth side panel 280 being a side panel located near the rear side of the third side panel 270 along the front-back direction.

[0199] One end of the fourth side panel 280 along the second direction Y is connected to one end of the third side panel 270 along the third direction Z. With reference to the orientation in FIG. 26 , the left end of the fourth side panel 280 along the left-right direction can be connected to the rear end of the third side panel 270 along the front-back direction.

[0200] The sensor 400 is connected to the wall of the fourth side plate 280 facing away from the water receiving chamber 220. It can be understood that the sensor 400 can be arranged on the wall of the fourth side plate 280 facing away from the water receiving chamber 220 close to the outside, or can be arranged on the wall of the fourth side plate 280 facing away from the water receiving chamber 220 close to the inside. Some embodiments of the present application are described by taking the example of the sensor 400 being arranged on the wall of the fourth side plate 280 facing away from the water receiving chamber 220 close to the outside.

[0201] In this solution, the sensor 400 is connected to the wall of the fourth side plate 280 facing away from the water receiving chamber 220. On the one hand, it can prevent the condensed water in the water receiving chamber 220 from entering the sensor 400 and causing malfunctions, thereby extending the service life of the sensor 400. On the other hand, it can enable the sensor 400 to be located inside the first water receiving tray 200 perpendicular to the first direction X, thereby optimizing the overall spatial layout of the air handling unit 10.

[0202] The following defines the meaning of "along the third direction Z, the first drain outlet 211 is located on the side of the first side panel 210 adjacent to the fourth side panel 280": a plane perpendicular to the third direction Z is defined as the second plane b, and the two opposite outermost endpoints of the first side panel 210 along the third direction Z are equidistant from the second plane b. Along the third direction Z, the first drain outlet 211 is located on the side of the second plane b facing the fourth side panel 280.

[0203] As can be seen from the above definition, when the first drain outlet 211 is located on the side of the second plane b facing away from the fourth side panel 280, along the third direction Z, the first drain outlet 211 is located on the side of the first side panel 210 facing away from the fourth side panel 280. It should be noted that, with reference to the orientation in Figure 26, when the third direction Z points in the front-to-back direction, that is, along the front-to-back direction, the first drain outlet 211 is located on the side of the first side panel 210 adjacent to the fourth side panel 280.

[0204] In this solution, since the fourth side plate 280 is connected to the third side plate 270, the third side plate 270 is opposite to the first side plate 210, and the first drain outlet 211 is provided on the first side plate 210, along the third direction Z, the first drain outlet 211 is located on the side of the first side plate 210 adjacent to the fourth side plate 280. That is, it can be understood that the sensor 400 of this solution is arranged adjacent to the first drain outlet 211, so that the sensor 400 can timely monitor the leaked refrigerant deposited and gathered at the first drain outlet 211, thereby further improving the reliability of refrigerant monitoring.

[0205] The specific arrangement of the water receiving chamber 220 is described below. In some embodiments, along a first direction X, the first water receiving tray 200 is provided with a bottom wall 240 opposite the water receiving port 230. With reference to the orientation in Figure 29 , when the first direction X indicates a vertical direction, the water receiving port 230 is located on the upper side of the first water receiving tray 200 in the vertical direction, and the bottom wall 240 is located on the lower side of the first water receiving tray 200 in the vertical direction. Specifically, the bottom wall 240 can be the lower side of the first water receiving tray 200, closer to the outer side in the vertical direction.

[0206] Taking the orientation in Figure 30 as a reference, the cross-sectional area of ​​the water receiving chamber 220 perpendicular to the first direction X gradually increases in the direction from the bottom wall 240 toward the water receiving port 230, that is, from bottom to top. It can be understood that the cross-sectional area of ​​the water receiving chamber 220 on the water receiving port 230 side is larger than the cross-sectional area on the bottom wall 240 side, thereby improving the water receiving rate of the first water receiving tray 200 and reducing the flow of condensed water into the outside of the water receiving chamber 220. It should be noted that the cross-sectional area of ​​the water receiving chamber 220 perpendicular to the first direction X can increase uniformly or non-uniformly. Some embodiments of the present application are described using the example of a uniform increase in the cross-sectional area of ​​the water receiving chamber 220 perpendicular to the first direction X.

[0207] The specific configuration of the inner peripheral wall 260 is described below. The inner peripheral wall 260 can define the air duct 250, and the inner peripheral wall 260 has a central axis parallel to the first direction X. With reference to the orientation in FIG. 30 , the inner peripheral wall 260 has a central axis parallel to the vertical direction. The distance between the inner peripheral wall 260 and the central axis gradually decreases along the direction from the bottom wall 240 toward the water inlet 230. In other words, the inner peripheral wall 260 of this embodiment is arranged at an angle. The inclined arrangement of the inner peripheral wall 260 provides space for the sensor 400, preventing the sensor 400 from occupying excessive horizontal space and optimizing the spatial layout of the air handling unit 10.

[0208] 30 , in some embodiments, a heat insulating portion 420 is further provided between the sensor 400 and the first water receiving tray 200, and the heat insulating portion 420 may be a sponge or the like. One side of the heat insulating portion 420 is connected to the first water receiving tray 200, and the other side is connected to the sensor 400. It is understood that in some embodiments, the heat insulating portion 420 may be bonded or snapped to the first water receiving tray 200. In other embodiments, the heat insulating portion 420 may be bonded or snapped to the sensor 400, and the specific details may depend on the actual situation. It should be noted that the specific coverage area and coverage thickness of the heat insulating portion 420 may be determined according to the actual situation. By providing the heat insulating portion 420, this solution can effectively suppress the heat transfer from the sensor 400 to the first water receiving tray 200, prevent the sensor 400 from transmitting cold to produce condensed water, improve the waterproof performance of the sensor 400, and further improve the reliability of the refrigerant monitoring of the sensor 400.

[0209] Referring to Figures 29 and 30 , an embodiment of the present application provides an air handling unit 10, comprising a water tray assembly 101 as described in the above embodiment, and a heat exchanger 100. Specifically, the heat exchanger 100 is disposed on one side of a first water tray 200 along a first direction X. Referring to the orientation in Figure 29 , in some embodiments, when the first direction X is vertical, the heat exchanger 100 may be disposed on the upper side or the lower side of the first water tray 200 along the vertical direction. In other embodiments, when the first direction X is horizontal, the heat exchanger 100 may be disposed on the left side or the right side of the first water tray 200 along the horizontal direction. In other embodiments, when the first direction X is front-to-back, the heat exchanger 100 may be disposed on the front side or the rear side of the first water tray 200 along the front-to-back direction. In some embodiments of the present application, the first direction X is used as the vertical direction, and the heat exchanger 100 is disposed on the upper side of the first water receiving pan 200 along the vertical direction. It should be noted that, to facilitate the first water receiving pan 200 to directly receive the condensed water from the heat exchanger 100, when the heat exchanger 100 is not disposed on the upper side of the first water receiving pan 200 along the vertical direction, the air handling unit 10 should be positioned so that the heat exchanger 100 is located on the upper side of the first water receiving pan 200 along the vertical direction during installation. This allows the first water receiving pan 200 to effectively receive the condensed water dripping along the vertical direction.

[0210] It should be noted that the air handling unit 10 of the embodiments of the present application can be installed vertically (arranged vertically along the first direction X) or horizontally (arranged vertically along the second direction Y), allowing the air handling unit 10 to adapt to a variety of application scenarios. Due to the different installation methods of the air handling unit 10, the position of the water receiving tray of the air handling unit 10 may also vary. In some embodiments, the air handling unit 10 is equipped with a second water receiving tray 300 to cope with the different installation methods of the air handling unit 10. It can be understood that the second water receiving tray 300 has the same function as the first water receiving tray 200.

[0211] Referring to Figure 31 , it should be noted that in some embodiments, when the air handling unit 10 is installed vertically, condensed water can be collected by the first water receiving tray 200. Referring to Figure 32 , in other embodiments, when the air handling unit 10 is installed horizontally, condensed water can be collected by the second water receiving tray 300. It will be understood that during the water collection operation, both the first water receiving tray 200 and the second water receiving tray 300 must be located at the lower vertical portion of the air handling unit 10 to collect condensed water dripping from the heat exchanger 100.

[0212] To facilitate description and understanding of the arrangement position of the second water receiving tray 300 relative to the heat exchanger 100, a fourth direction V is defined, and the second water receiving tray 300 is arranged on one side of the first water receiving tray 200 along the fourth direction V, and the fourth direction V is perpendicular to the first direction X. It should be noted that the fourth direction V can be any direction perpendicular to the first direction X, that is, the direction of the fourth direction V can be the same as the direction of the second direction Y or the third direction Z mentioned in other embodiments. Some embodiments of the present application are described by taking the direction of the fourth direction V being the same as the direction of the third direction Z as an example. With reference to the orientation in Figure 28, in some embodiments, when the first direction X indicates the up and down direction, the fourth direction V can indicate the front and back direction, that is, the second water receiving tray 300 is arranged on the front side of the first water receiving tray 200 along the front and back direction, and can also be arranged on the rear side of the first water receiving tray 200 along the front and back direction. In other embodiments, when the first direction X represents the vertical direction, the fourth direction V may also represent the horizontal direction, i.e., the second water receiving tray 300 is located on the left side of the first water receiving tray 200 in the horizontal direction, or it may be located on the right side of the first water receiving tray 200 in the horizontal direction. In some embodiments of the present application, the first direction X represents the vertical direction, and the second water receiving tray 300 is located on the right side of the first water receiving tray 200 in the horizontal direction. It is understood that when the air handling unit 10 is installed horizontally, the second water receiving tray 300 should be located on the lower side of the air handling unit 10 in the vertical direction.

[0213] This solution provides a second water receiving tray 300, that is, regardless of whether the air handling unit 10 is installed vertically in the first direction X (vertical installation) or vertically in the second direction Y (horizontal installation), there is a water receiving tray for holding condensed water, which can ensure the waterproof performance of the air handling unit 10 and adapt to various application scenarios of the air handling unit 10.

[0214] 28 , in some embodiments, the second water receiving tray 300 is provided with a second drain outlet 311. The setting of the second drain outlet 311 may be the same as or different from the first drain outlet 211. The second drain outlet 311 may be provided as a single one or as a plurality of them. Some embodiments of the present application are described by taking the first drain outlet 211 and the second drain outlet 311 as having the same setting, and both having two as an example. It can be understood that the second drain outlet 311 may be provided on the lower side of the second water receiving tray 300 along the depth direction of its water receiving chamber 220 to ensure the removal effect of the condensed water in the second water receiving tray 300. By providing the second drain outlet 311, this solution facilitates the timely discharge of the condensed water in the second water receiving tray 300, prevents the condensed water from overflowing the water receiving chamber 220 of the second water receiving tray 300 and entering the internal circuit components of the air handling unit 10, and ensures that the air handling unit 10 can continue to operate normally.

[0215] The following describes the specific location of the second drain outlet 311 on the second water receiving tray 300. Specifically, along the second direction Y, the second drain outlet 311 and the first drain outlet 211 are located on the same side within the air handling unit 10. This allows the sensor 400 to be positioned adjacent to both the first drain outlet 211 and the second drain outlet 311. This allows the sensor 400 to be positioned adjacent to both the first drain outlet 211 and the second drain outlet 311. This allows the sensor 400 to promptly and accurately detect refrigerant deposited in either the first drain outlet 211 or the second drain outlet 311 when the air handling unit 10 is installed vertically along the first direction X or along the fourth direction V, ensuring reliable refrigerant monitoring.

[0216] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0217] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0218] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application description and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An air handling unit, comprising: Heat exchanger; A first water receiving tray, disposed on one side of the heat exchanger along the first direction, and located below the heat exchanger when the air handling unit is placed vertically along the first direction, for containing condensed water dripping from the heat exchanger; a second water receiving tray, disposed on one side of the heat exchanger along a second direction and located below the heat exchanger when the air handling unit is placed vertically along the second direction, for receiving condensed water dripping from the heat exchanger, the first direction being perpendicular to the second direction; as well as A sensor for detecting refrigerant leakage from the heat exchanger; Wherein, along the first direction, the sensor is located on a side of the heat exchanger adjacent to the first water receiving tray, and along the second direction, the sensor is located on a side of the heat exchanger adjacent to the second water receiving tray.

2. The air handling unit according to claim 1, wherein: The heat exchanger includes a coil assembly for conducting refrigerant, one end of the coil assembly along a third direction is an interface end, and the third direction is perpendicular to the first direction and the second direction; along the third direction, the sensor is adjacent to one side of the interface end of the heat exchanger.

3. The air handling unit according to claim 2, wherein: The sensor is connected to the heat exchanger, and along the first direction, the sensor is located between the heat exchanger and the first water receiving pan.

4. The air handling unit according to claim 3, wherein: The heat exchanger comprises a guard plate facing the first water receiving tray, a connecting plate is connected to a side of the guard plate adjacent to the interface end, and the sensor is connected to a wall surface of the connecting plate facing away from the guard plate.

5. The air handling unit according to any one of claims 1 to 4, wherein: A side plate of the first water receiving tray along a third direction is a first side plate, the third direction is perpendicular to the first direction and the second direction, and the first side plate is provided with a first drain port; along the third direction, the sensor is adjacent to one side of the first side plate of the first water receiving tray.

6. The air handling unit according to claim 5, wherein: The heat exchanger includes a coil assembly for conducting refrigerant, and one end of the coil assembly along the third direction is an interface end; the first side plate and the interface end are located on the same side of the air handling unit along the third direction.

7. The air handling unit according to claim 5 or 6, wherein: Along the second direction, the first drain port is arranged on a side of the first side plate adjacent to the second water receiving tray.

8. The air handling unit according to any one of claims 5 to 7, wherein: A side plate of the second water receiving tray along the third direction is a second side plate, and the second side plate is provided with a second drain port.

9. The air handling unit according to claim 8, wherein: Along the first direction, the second drain port is arranged on a side of the second side plate adjacent to the first side plate.

10. The air handling unit according to any one of claims 5 to 9, wherein: A plane perpendicular to the first direction is a first projection plane, the first drain port forms a first orthographic projection on the first projection plane, the sensor forms a second orthographic projection on the first projection plane, and along the third direction, the first orthographic projection and the second orthographic projection at least partially overlap; and / or, A side plate of the second water receiving tray along the third direction is a second side plate, the second side plate is provided with a second drain outlet, the plane perpendicular to the second direction is a second projection plane, the second drain outlet forms a third orthographic projection on the second projection plane, the sensor forms a fourth orthographic projection on the second projection plane, and along the third direction, the third orthographic projection at least partially overlaps with the fourth orthographic projection.

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