Indoor unit and air handling unit

Abstract

The present application provides an indoor unit and an air handling unit, wherein the indoor unit (100) comprises a housing assembly (110), a heat exchanger (120), a first transition pipe (180), a sensor (130) and a flow guide assembly (200). The housing assembly (110) defines a first chamber (114), and the housing assembly (110) comprises a first plate (112), the first plate body (112) being provided with a first through hole (1124) and a second through hole (1125) which communicate with the first chamber (114); the heat exchanger (120) is arranged in the first chamber (114), and the heat exchanger (120) comprises a first external connector (122A), the first external connector (122A) passing through the first through hole (1124); the sensor (130) is arranged in the housing assembly (110); the flow guide assembly (200) is adapted to be connected to the side wall of the first plate (112) facing away from the first chamber (114) and sleeved outside the first external connector (122A), the first transition pipe (180) and a first internal connector (190); and the flow guide assembly (200) is adapted to form, together with the first plate (112), the first external connector (122A), the first transition pipe (180) and the first internal connector (190), a first flow guide cavity (300) communicating with the second through hole (1125).

Description

Indoor unit and air handling unit

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent applications filed on October 31, 2024, with application number 202411546724.6 entitled "Indoor Unit and Air Handling Unit" and application number 202422658162.6 entitled "Indoor Unit and Air Handling Unit", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air conditioning technology, and in particular to an indoor unit and an air handling unit. Background Technology

[0004] Air conditioner indoor units use refrigerant to achieve their cooling function. Refrigerant leaks can affect the normal operation of the air conditioner, pose health risks, create safety hazards, and pollute the environment. Therefore, refrigerant sensors need to be installed on the indoor unit to detect refrigerant leaks. Related technologies focus on using refrigerant sensors to detect refrigerant leaks inside the indoor unit. However, detecting leaks outside the indoor unit requires a separate refrigerant sensor, which increases costs. Summary of the Invention

[0005] The main objective of this application is to provide an indoor unit and air handling unit that can at least partially solve one of the above-mentioned technical problems.

[0006] The indoor unit according to the first aspect of this application includes:

[0007] A housing assembly defining a first chamber, the housing assembly including a first plate having a first through hole and a second through hole respectively communicating with the first chamber;

[0008] A heat exchanger is disposed in the first chamber, and the heat exchanger includes a first external connector, which passes through the first through hole;

[0009] The first conversion tube has one end adapted to connect to the first external connector and the other end adapted to connect to the first internal connector of the outdoor unit.

[0010] A sensor for detecting the concentration of the heat exchange medium in its surroundings, the sensor being disposed within the housing assembly; and

[0011] A flow guiding assembly is adapted to connect to the side wall of the first plate away from the first chamber and sleeved on the outside of the first external connector, the first conversion tube and the first internal connector. The flow guiding assembly is adapted to form a first flow guiding cavity communicating with the second through hole and / or the first through hole together with the first plate, the first external connector, the first conversion tube and the first internal connector.

[0012] In some embodiments, the flow guiding assembly includes a fixing block and a first sleeve; the fixing block is adapted to be connected to the wall of the first plate away from the first chamber, the fixing block is provided with a third through hole communicating with the first through hole and the second through hole respectively, the first external connector is inserted through the third through hole and is clearance-fitted with the third through hole; and one end of the first sleeve is adapted to be connected to the fixing block, and the first sleeve is adapted to be sleeved on the outside of the first external connector, the first conversion tube and the first internal connector and connected to the outer peripheral wall of the first internal connector.

[0013] In some embodiments, the fixing block includes a base and a boss protruding from the base, the third through hole penetrates the base and the boss, and the first sleeve is adapted to be fitted around the outer periphery of the boss.

[0014] In some embodiments, the flow guiding assembly further includes a first binding member and a second binding member, wherein the first binding member is adapted to be sleeved on one end of the first sleeve and connect the first sleeve to the boss, and the second binding member is adapted to be sleeved on the other end of the first sleeve and connect the first sleeve to the first inner connector.

[0015] In some embodiments, one side of the first through hole connects to the second through hole along a direction perpendicular to the hole axis of the first through hole.

[0016] In some embodiments, the first plate body includes a plate body and an assembly block. The plate body is provided with an assembly opening, which includes a first region and a second region. The assembly block is detachably connected to the plate body and covers the first region. The second region includes a first through hole and a second through hole.

[0017] In some embodiments, the second region further includes a fourth through hole and a fifth through hole, the fourth through hole communicating with the second through hole and spaced apart from the first through hole; the heat exchanger further includes a second external connector, the second external connector passing through the fourth through hole out of the first chamber; the indoor unit further includes a second conversion pipe, one end of the second conversion pipe being adapted to connect to the second external connector, and the other end being adapted to connect to the second internal connector of the outdoor unit; the fixing block is provided with a sixth through hole communicating with the fourth through hole and the fifth through hole respectively, the second external connector passing through the sixth through hole and having a clearance fit with the sixth through hole; and the flow guiding assembly further includes a second sleeve, one end of the second sleeve being adapted to connect to the fixing block, and the second sleeve being adapted to be sleeved outside the second external connector, the second conversion pipe and the second internal connector and connected to the outer peripheral wall of the second internal connector, so as to define a second flow guiding cavity communicating with the fifth through hole and / or the fourth through hole together with the second external connector, the second conversion pipe and the second internal connector.

[0018] In some embodiments, the elastic modulus of the material of the first sleeve is less than the elastic modulus of the material of the first conversion tube.

[0019] In some embodiments, the elastic modulus of the base material is less than that of the elastic modulus of the material of the first external connector.

[0020] In some embodiments, the first conversion tube is adapted to be threadedly connected to the first external connector.

[0021] In some embodiments, the first conversion tube is adapted to be welded to the first internal connector.

[0022] In some embodiments, the sensor is connected to the first plate.

[0023] In some embodiments, the sensor is located below the second through-hole.

[0024] An embodiment of the second aspect of this application also provides an air handling unit, including an indoor unit and an outdoor unit of any of the above embodiments; the outdoor unit includes the first internal connector.

[0025] Wherein, one end of the first conversion tube is connected to the first external connector, and the other end is connected to the first internal connector; the flow guiding component is connected to the side wall of the first plate away from the first chamber and is sleeved on the outside of the first external connector, the first conversion tube and the first internal connector, and the flow guiding component together with the first plate, the first external connector, the first conversion tube and the first internal connector to form a first flow guiding cavity that communicates with the second through hole. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 is a perspective view of the first side of the indoor unit provided in one embodiment of this application;

[0028] Figure 2 is a front view of an indoor unit provided in one embodiment of this application; wherein, part of the shell body has been removed, and some parts covered by the first plate are shown.

[0029] Figure 3 is a perspective view of the second side of the indoor unit provided in one embodiment of this application; wherein the second plate has been removed.

[0030] Figure 4 is a three-dimensional schematic diagram of the first plate, sensor and first water receiving tray combined in one embodiment of this application;

[0031] Figure 5 is a magnified view of part A in Figure 4;

[0032] Figure 6 is an exploded view of the first plate, second plate, first connector and third connector combined in one embodiment of this application;

[0033] Figure 7 is a top view of an indoor unit provided in one embodiment of this application;

[0034] Figure 8 is a cross-sectional view along the BB direction in Figure 7;

[0035] Figure 9 is a magnified view of part C in Figure 8;

[0036] Figure 10 is an exploded view of the combination of the flow guiding component, external connector, first conversion tube and first internal connector provided in one embodiment of this application.

[0037] Figure 11 is an exploded view of the flow guiding component, external connector, and first plate assembly provided in one embodiment of this application; and

[0038] Figure 12 is an exploded view of the first plate, the second plate, the first connector, and the second connector combined in another embodiment of this application.

[0039] Reference numerals: Indoor unit 100; Housing assembly 110; Housing body 111; First opening 1111; First plate 112; Second side 1121; Third side 1122; First connecting side 1123; First through hole 1124; Second through hole 1125; Plate body 1126; Assembly block 1127; First area 1128; Second area 1129; Second plate 113; First side 1131; Fourth side 1132; Second connecting side 1133; Clearance groove 11331; First chamber 114; Fourth through hole 115; Fifth through hole 116; Heat exchanger 120; Heat exchange pipeline 121; External connector 122; First external connector 122A; Second external connector 122B; Sensor 130; Sensor body 131; Detection port 1311; Wiring terminal 1312; Fixing bracket 132; Step portion 1321; First step surface 13211; Second step surface 13212; Water blocking portion 1322; First water receiving tray 140; Side plate 141; Second water receiving tray 150; First connector 160; Third connector 170; First conversion pipe 180; First internal connector 190; Flow guiding assembly 200; Fixing block 210; Base 211; Boss 212; First sleeve 220; Third through hole 230; Second sleeve 240; First binding piece 250; Second binding piece 260; Sixth through hole 270; First flow guiding cavity 300; Second conversion pipe 400; Overflow hole 500; Second connector 600; Axial direction L; First direction X; Second direction Y.

[0040] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0044] In related technologies, refrigerant sensors are connected to the air conditioner heat exchanger or the air conditioner drip tray. The placement of the refrigerant sensor is affected by the placement of the heat exchanger, leading to difficulties in installation and maintenance, poor flexibility, and an inability to accommodate different heat exchanger placements or various installation scenarios for the indoor unit. More specifically, the inventors discovered that, on the one hand, the indoor unit can be modularly designed, meaning the heat exchanger can be installed or modified in any suitable location within the indoor unit cavity as needed; on the other hand, the indoor unit can have multiple installation methods, such as vertical or horizontal installation, and each of these methods can be further divided into two installation methods by rotating 180°. Therefore, under different indoor unit installation methods, connecting the refrigerant sensor to the heat exchanger or the drip tray cannot guarantee good detection results, nor can it guarantee ease of installation and maintenance.

[0045] Therefore, referring to Figures 1-12, an indoor unit 100 is provided in the first aspect of this application, including a housing assembly 110, a heat exchanger 120, a first conversion tube 180, and a sensor 130. The indoor unit 100 can be used for any suitable type of air handling unit, and the installation method of the indoor unit 100 can be wall-mounted, floor-standing, ceiling-mounted, or other similar forms, or the indoor unit 100 can be installed using one of several installation methods as needed.

[0046] Referring to Figures 1-3, the housing assembly 110 defines a first chamber 114. The housing assembly 110 includes a first plate 112, which has a first through hole 1124 and a second through hole 1125 that communicate with the first chamber 114.

[0047] Referring to Figures 1-3, the housing assembly 110 includes a housing body 111, a first plate 112, and a second plate 113. The housing body 111 has a first opening 1111. The first plate 112 and the second plate 113 are both connected to the housing body 111, and the first plate 112 and the second plate 113 together cover the first opening 1111. The first plate 112 and the second plate 113 can both serve as a panel on one side of the housing assembly 110 (it can be any suitable side). In some embodiments, the panel on one side of the housing assembly 110 can be formed by both the first plate 112 and the second plate 113. In other embodiments, the panel on one side of the housing assembly 110 can be partially formed by only the first plate 112 and the second plate 113. Furthermore, the shell body 111 may include other plate parts of the shell assembly 110 besides the first plate 112 and the second plate 113, so that the shell body 111, the first plate 112, and the second plate 113 can together constitute the outer shell of the indoor unit 100. The following defines the detachable connection of the first plate 112 and the second plate 113 to the shell body 111 as follows: Taking the detachable connection of the second plate 113 to the shell body 111 as an example, the connection between the second plate 113 and the shell body 111 is detachable, and the separation of the two does not affect the installation and fixation of other structures (including the shell body 111 and the first plate 112). That is, the second plate 113 can be separated independently. In addition, in some embodiments, the first plate 112 and the second plate 113 can also be detachably connected.

[0048] Referring to Figures 1-3, the main function of heat exchanger 120 is to regulate indoor temperature through heat exchange. Heat exchanger 120 is located within housing assembly 110; that is, housing assembly 110 itself defines a receiving cavity, and heat exchanger 120 is disposed within this cavity. Heat exchanger 120 includes a heat exchange pipe 121 for transporting the heat exchange medium. An external connector 122 is provided on the side of heat exchange pipe 121 facing the first opening 1111. The external connector 122 passes through and can connect to the first plate 112. Specifically, the heat exchange medium can be a refrigerant (or cooling medium), and the heat exchange medium can be flammable. In different embodiments, the heat exchange medium can be in a liquid, gaseous, or mixed state.

[0049] Referring to Figures 1-3, sensor 130 is used to detect the concentration of the heat exchange medium in its surroundings. The sensor is disposed within the housing assembly 110 and connected to the first plate 112 and / or the second plate 113. It should be noted that, in different embodiments, the detection function of sensor 130 described in this application can be either intermittent detection operating at intervals or continuous monitoring. Depending on the type of heat exchange medium and the detection requirements, sensor 130 can detect the concentration of the heat exchange medium in any suitable manner. For example, sensor 130 can be a gas sensor 130, capable of sensing the gas concentration or gas composition in its surroundings; or sensor 130 can be a temperature sensor 130, capable of sensing the temperature in its surroundings, and then using the temperature sensing data to determine whether there is a leak of heat exchange medium in its surroundings, while also further detecting the concentration of the leaked heat exchange medium; or sensor 130 can be an ultrasonic sensor 130, capable of using ultrasonic signals to sense the gas flow in its surroundings, and then using the gas flow sensing data to determine whether there is a leak of heat exchange medium in its surroundings, while also further detecting the concentration of the leaked heat exchange medium.

[0050] Referring to Figures 1-3 and 10-11, the heat exchanger 120 is disposed in the first chamber 114. The heat exchanger 120 includes a first external connector 122A, which extends out of the first chamber 114 through a first through hole 1124. One end of the first conversion pipe 180 is adapted to connect to the first external connector 122A, and the other end is adapted to connect to the first internal connector 190 of the outdoor unit. It can be understood that the first external connector 122A extends outward relative to the housing assembly 110 to form the external pipeline of the heat exchanger 120, and the first conversion pipe 180 is used to connect the pipeline of the heat exchanger 120 to the pipeline of the outdoor unit.

[0051] As can be seen, in the solution of this application, the sensor 130 is installed using the first plate 112 and / or the second plate 113. Since both the first plate 112 and the second plate 113 are detachably connected to the main body 111, the installation or maintenance of the sensor 130 is more convenient and not limited by the location of the heat exchanger 120. Furthermore, different locations of the heat exchanger 120 and various installation arrangements of the indoor unit 100 do not affect the installation, maintenance, or function of the sensor 130. Therefore, the indoor unit 100 of this application allows for more convenient installation or maintenance of the sensor 130.

[0052] Referring to Figures 7-11, the indoor unit 100 may further include a flow guiding assembly 200. The flow guiding assembly 200 is adapted to connect to the side wall of the first plate 112 away from the first chamber 114 and is sleeved on the outside of the first external connector 122A, the first conversion pipe 180 and the first internal connector 190. The flow guiding assembly 200, together with the first plate 112, the first external connector 122A, the first conversion pipe 180 and the first internal connector 190, defines a first flow guiding cavity 300 that communicates with the second through hole 1125. It is understood that the flow guiding component 200 can be sleeved on the first external connector 122A, the first conversion tube 180 and the first internal connector 190 to form the first flow guiding cavity 300 of the flow guiding component 200. Based on this, the second through hole 1125 can connect the first flow guiding cavity 300 formed by the flow guiding component 200 and the first chamber 114 of the housing component 110. Since the sensor 130 is set inside the housing component 110, the sensor 130 can detect whether there is a leakage inside the housing component 110, and can also detect whether there is a leakage at the location outside the housing component 110 where the flow guiding component 200 is sleeved.

[0053] Referring to Figures 7-11, in some embodiments, the flow guiding assembly 200 includes a fixing block 210 and a first sleeve 220. The fixing block 210 is adapted to be connected to the wall of the first plate 112 opposite to the first chamber 114. The fixing block 210 is provided with a third through hole 230 that communicates with the first through hole 1124 and the second through hole 1125 respectively. It should be noted that in some embodiments, the same part of the third through hole 230 can simultaneously communicate with the first through hole 1124 and the second through hole 1125; in other embodiments, two different parts of the third through hole 230 can respectively communicate with the first through hole 1124 and the second through hole 1125; furthermore, in different embodiments, the first through hole 1124 and the second through hole 1125 can be spaced apart from each other or communicate with each other. In some embodiments, along a direction perpendicular to the hole axis of the first through hole 1124, one side of the first through hole 1124 communicates with the second through hole 1125. The first external connector 122A passes through the third through hole 230 and is clearance-fitted with the third through hole 230. One end of the first sleeve 220 is adapted to connect to the fixing block 210, and the first sleeve 220 is adapted to be sleeved on the outside of the first external connector 122A, the first conversion tube 180 and the first internal connector 190 and connected to the outer peripheral wall of the first internal connector 190.

[0054] Furthermore, based on the fixing block 210 and the first sleeve 220 defined in the above embodiments, referring to Figures 7-11, in some embodiments, the fixing block 210 includes a base 211 and a boss 212 protruding from the base 211, a third through hole 230 penetrating the base 211 and the boss 212, and the first sleeve 220 is adapted to be fitted onto the outer periphery of the boss 212. Through the above arrangement, the connection between the first sleeve 220 and the fixing block 210 is more stable and easier to disassemble.

[0055] Furthermore, based on the boss 212 and the first sleeve 220 configured in the above embodiments, referring to Figures 7-11, in some embodiments, the flow guiding assembly 200 further includes a first binding member 250 and a second binding member 260, referring to Figure 8. The first binding member 250 is adapted to be fitted onto one end of the first sleeve 220 and tighten the connection between the first sleeve 220 and the boss 212. The second binding member 260 is adapted to be fitted onto the other end of the first sleeve 220 and tighten the connection between the first conversion tube 180 and the first inner connector 190. Through the above configuration, the first binding member 250 and the second binding member 260 can improve the sealing effect at the connection between the first sleeve 220 and the boss 212, and at the connection between the first conversion tube 180 and the first inner connector 190. Specifically, referring to Figure 10, both the first binding member 250 and the second binding member 260 can be hose clamps.

[0056] Furthermore, referring to Figures 7-11, in some embodiments, the first through hole 1124 and the second through hole 1125 are interconnected. This arrangement makes the processing of the first plate 112 more convenient and reduces processing costs. Depending on requirements, in other embodiments, the first through hole 1124 and the second through hole 1125 may also be spaced apart.

[0057] Furthermore, based on the above embodiments, the first through hole 1124 and the second through hole 1125 are interconnected. Referring to Figures 7-11, in some embodiments, the first plate 112 includes a plate body 1126 and an assembly block 1127. The plate body 1126 is provided with an assembly opening, which includes a first region 1128 and a second region 1129. The assembly block 1127 is detachably connected to the plate body 1126 and covers the first region 1128. The second region 1129 includes the first through hole 1124 and the second through hole 1125. With the above configuration, when the user needs to install or remove the first external connector 122A, the assembly block 1127 can first be separated from the plate body 1126, and after completing the disassembly and assembly operation, the assembly block 1127 can be installed back onto the plate body 1126. Therefore, the detachable assembly block 1127 facilitates the disassembly and assembly operation of the first external connector 122A. Furthermore, by mounting the assembly block 1127 onto the main body 1126, the first region 1128 is covered, while the second region 1129 (the first through hole 1124 and the second through hole 1125) is exposed. Thus, the size and shape of the covered first region 1128 depend on the assembly block 1127, which makes the first through hole 1124 and the second through hole 1125 easier to design and easier to adjust via the assembly block 1127.

[0058] Furthermore, based on the plate body 1126 and assembly block 1127 configured in the above embodiments, referring to Figures 7-11, in some embodiments, the second region 1129 further includes a fourth through hole 115 and a fifth through hole 116. The fourth through hole 115 communicates with the second through hole 1125, and the fourth through hole 115 and the first through hole 1124 are spaced apart in a direction perpendicular to the axial direction L. Based on this, in some embodiments, the heat exchanger 120 further includes a second external connector 122B, which passes through the fourth through hole 115 and exits the first chamber 114; the indoor unit 100 further includes a second conversion pipe 400, one end of which is adapted to connect to the second external connector 122B, and the other end is adapted to connect to the second internal connector of the outdoor unit; the fixing block 210 is provided with a sixth through hole 270 that communicates with the fourth through hole 115 and the fifth through hole 116 respectively, and the second external connector 112B... B is inserted through the sixth through hole 270 and is clearance-fitted with the sixth through hole 270; the flow guiding assembly 200 also includes a second sleeve 240, one end of which is adapted to connect to the fixing block 210, and the second sleeve 240 is adapted to be sleeved on the outside of the second external connector 122B, the second conversion tube 400 and the second internal connector and connected to the outer peripheral wall of the second internal connector, so as to define the second flow guiding cavity communicating with the fifth through hole 116 together with the second external connector 122B, the second conversion tube 400 and the second internal connector. It is understood that the second external connector 122B and the second sleeve 240 configured above are similar to the configuration of the first external connector 122A and the first sleeve 220 in the aforementioned embodiment (and the configuration of the second external connector 122B and the second sleeve 240 can refer to the relevant configuration of the first external connector 122A and the first sleeve 220). The difference is that the second external connector 122B can be another connector extending outward relative to the housing assembly 110 (its function can be the same as or different from that of the first external connector 122A. For example, the first external connector 122A and the second external connector 122B can both be input connectors for providing refrigerant, or the first external connector 122A can be an input connector for providing refrigerant, while the second external connector 122B can be an output connector for discharging refrigerant).

[0059] Furthermore, in some embodiments, the elastic modulus of the material of the first sleeve 220 is less than that of the material of the first conversion tube 180. This arrangement makes the first sleeve 220 more easily deformable than the first conversion tube 180. Therefore, when the first conversion tube 180 is bent (or requires a change in specifications), the deformation of the first sleeve 220 can directly adapt it to the structure of the first conversion tube 180, making it suitable for being fitted over the first conversion tube 180. Thus, this arrangement allows for more flexible placement and easier installation of the first sleeve 220. Specifically, the material of the first sleeve 220 can be PE cotton or any suitable soft material. On the other hand, in some embodiments, the elastic modulus of the material of the base 211 is less than that of the material of the first external connector 122A. The aforementioned design makes the base 211 more easily deformable than the first external connector 122A. Therefore, when the structure of the first external connector 122A is complex (or when there is a need to change the specifications of the first external connector 122A), the base 211 can be directly deformed to fit the structure of the first external connector 122A, allowing the base 211 to be fitted over the first external connector 122A. Thus, this design makes the connection and installation at the base 211 more convenient and reduces vibration caused by the rigid connection between the base 211 and the first external connector 122A. Specifically, the material of the base 211 can be rubber or any suitable soft material.

[0060] Furthermore, in some embodiments, the first conversion tube 180 is adapted to be threadedly connected to the first external connector 122A. This arrangement facilitates easier assembly and disassembly of the connection between the first conversion tube 180 and the first external connector 122A, and also facilitates sealing. In other embodiments, the first conversion tube 180 is adapted to be welded to the first internal connector 190. This arrangement also makes the connection between the first conversion tube 180 and the first internal connector 190 more secure and facilitates sealing.

[0061] Referring to the previously mentioned housing assembly 110 (see Figures 1-3), the sensor 130 is housed within the housing assembly 110 and connected to the first plate 112 and / or the second plate 113. The connection between the sensor 130 and the first plate 112 and / or the second plate 113 can be fixed or detachable. Furthermore, the connection of the sensor 130 to the first plate 112 and / or the second plate 113 indicates that the sensor 130 can be connected to either the first plate 112 or the second plate 113, or simultaneously to both. This configuration allows the sensor 130 to be mounted using the first plate 112 and / or the second plate 113. Since both the first plate 112 and the second plate 113 are detachably connected to the housing body 111, the installation and maintenance of the sensor 130 are more convenient and not limited by the location of the heat exchanger 120. For example, taking the case where sensor 130 is only connected to the first plate 112, when it is necessary to install or repair sensor 130, one approach is to remove the second plate 113 separately, while the first plate 112 and sensor 130 can be installed in their original positions. This allows the operator to reach into the housing assembly 110 with their hands or tools to install or repair sensor 130, and provides a large operating space. Alternatively, another approach is to remove the first plate 112 separately, and sensor 130 is also removed at the same time. The second plate 113 can then be installed in its original position, which facilitates further processing of sensor 130 by the operator.

[0062] In conjunction with the previous heat exchanger 120, the different settings of the heat exchanger 120 and the various installation and placement methods of the air conditioner indoor unit 100 will not affect the installation, maintenance and function of the sensor 130. More specifically, since the sensor 130 is connected to the first plate 112 and / or the second plate 113, it can avoid the sensor 130's detection accuracy from deteriorating due to other structures blocking the heat exchange medium caused by changes in the setting of the heat exchanger 120 or the installation method of the air conditioner indoor unit 100, or the sensor 130 hindering the installation of other structures.

[0063] Furthermore, while the sensor 130 can detect the concentration of the heat exchange medium around the heat exchanger 120, since the external connector 122 is located on the side close to the first opening 1111, the sensor 130 can also detect the concentration of the heat exchange medium around the external connector 122. This makes the detection function of the sensor 130 more comprehensive and helps to reduce costs.

[0064] To ensure that the sensor 130 has a better detection effect on the concentration of the heat exchange medium around the heat exchanger 120, referring to Figures 2 and 3, in some embodiments, the plane perpendicular to the axial direction L of the first opening 1111 is the projection plane. The heat exchanger 120 forms a first orthographic projection on the projection plane, and the sensor 130 forms a second orthographic projection on the projection plane. The first and second orthographic projections at least partially overlap. In other words, when viewed along the axial direction L of the first opening 1111, the heat exchanger 120 and the sensor 130 can at least partially overlap. It is understood that the side of the sensor 130 facing the heat exchanger 120 along the axial direction L of the first opening 1111 can be used for detection, so that the first and second orthographic projections at least partially overlap allows the sensor 130 to be closer to the heat exchanger 120, and the detection effect is better.

[0065] Regarding the specific connection method of sensor 130, in the first type of connection method, sensor 130 is connected to the first plate 112, and sensor 130 is located on the side of the first plate 112 near the second plate 113. The aforementioned side of the first plate 112 near the second plate 113 refers to the side of the first plate 112 and the second plate 113 that are adjacent to each other. When there are multiple adjacent sides, sensor 130 can be installed on any one of them, or on the side near the heat exchanger 120 and the external connector 122. It is understood that the sensor 130 can be connected to the first plate 112 without being connected to the second plate 113. Based on this, in some embodiments, since the external connector 122 passes through and is connected to the first plate 112, the first plate 112 is not easy to disassemble in some embodiments. Therefore, the sensor 130 can be set on the side of the first plate 112 near the second plate 113 so that after the second plate 113 is removed, the sensor 130 is closer to the first opening 1111 exposed by the removal of the second plate 113. Thus, the user can more conveniently install and repair the sensor 130 through the exposed first opening 1111.

[0066] In the second connection method, sensor 130 is connected to the second plate 113, and sensor 130 is located on the side of the second plate 113 near the external connector 122. It is understood that sensor 130 can be connected to the second plate 113 without connecting to the first plate 112. Based on this, in some embodiments, since the external connector 122 passes through and connects to the first plate 112, the first plate 112 is not easily disassembled. Therefore, sensor 130 can be placed on the second plate 113, so that sensor 130 can be removed together with the second plate 113, thereby facilitating the installation and maintenance of sensor 130. Furthermore, the location of sensor 130 on the side of the second plate 113 near the external connector 122 also gives sensor 130 a better detection effect on the concentration of the heat exchange medium around the external connector 122.

[0067] Referring to Figures 2 and 6, in the third type of connection, sensor 130 is connected to both the first plate 112 and the second plate 113. Viewed along the axial direction L of the first opening 1111, sensor 130 at least partially overlaps with both the first plate 112 and the second plate 113. It is understood that connecting sensor 130 to both the first plate 112 and the second plate 113 simultaneously can improve the connection stability of sensor 130.

[0068] It should be noted that, among the three connection methods described above, the connection between the sensor 130 and the first plate 112 and / or the second plate 113 can be a direct connection (e.g., connecting the first plate 112 and / or the second plate 113 through an opening on the sensor 130 or other structures), or an indirect connection (e.g., connecting the sensor 130 to the fixed bracket 132, and connecting the fixed bracket 132 to the first plate 112 and / or the second plate 113). The limitations of the sensor 130 being located on the side or at the junction are determined by projection. Taking the limitation of the sensor 130 being located on the side of the first plate 112 near the second plate 113 as an example, it is defined as the projection of the sensor 130 on the projection plane and the projection of the side of the first plate 112 near the second plate 113 on the projection plane having an overlapping portion along the axial direction L of the first opening 1111.

[0069] Referring to Figures 3-5, in some embodiments, the indoor unit 100 further includes a first drip tray 140, which can be used to collect and drain condensate. The first drip tray 140 can have any suitable structural shape as needed, and can be connected to the heat exchanger 120 or the housing body 111. Thus, in some embodiments, the first drip tray 140 is disposed within the housing assembly 110 and located on one side of the heat exchanger 120 along a first direction X, where the first direction X is perpendicular to the axial direction L of the first opening 1111. The first drip tray 140 is used to collect condensate falling along the first direction X from the outer wall of the heat exchanger 120. Along the first direction X, the sensor 130 can be located on the side of the first drip tray 140 near the external connector 122. This arrangement allows the sensor 130 to have better detection performance for the concentration of the heat exchange medium around the external connector 122 and around the first drip tray 140.

[0070] To achieve a more comprehensive water collection function, referring to Figures 3-5, in some embodiments, the indoor unit 100 further includes a second water collection tray 150. The second water collection tray 150 is disposed within the housing assembly 110 and located on one side of the heat exchanger 120 along the second direction Y. The second direction Y is perpendicular to both the first direction X and the axial direction L of the first opening 1111. The second water collection tray 150 is used to collect condensate falling along the second direction Y from the outer wall of the heat exchanger 120. It can be understood that the second water collection tray 150 has the same function as the first water collection tray 140, both serving to collect condensate. The difference lies in their different positions, allowing them to collect condensate falling in different directions. Therefore, more specifically, in some embodiments, the indoor unit 100 has a first installation state and a second installation state. In the first installation state, the first water collection tray 140 is located below the heat exchanger 120; in the second installation state, the second water collection tray 150 is located below the heat exchanger 120. In actual use and installation scenarios, the indoor unit 100 can have multiple orientation angles (or multiple installation methods). Through the above-described settings, at least one of the first drip tray 140 and the second drip tray 150 can effectively collect condensate while the indoor unit 100 has various orientation angles. For example, in some embodiments, the first direction X can be the direction of gravity, and the second direction Y can be a horizontal direction perpendicular to the direction of gravity. Therefore, the indoor unit 100 can effectively collect condensate whether it is installed vertically or horizontally.

[0071] Furthermore, based on the above embodiments regarding the arrangement of the first water receiving tray 140 and the second water receiving tray 150, in order to enable the sensor 130 to also have a better detection effect on the concentration of the heat exchange medium around the second water receiving tray 150, in some embodiments, along the second direction Y, the sensor 130 is located on the side of the external connector 122 near the second water receiving tray 150. Alternatively, referring to Figures 4-5, in other embodiments, the second plate 113 has a first side 1131 arranged opposite to the external connector 122 along the second direction Y, and the sensor 130 is located on the side of the external connector 122 near the first side 1131 (along the axial direction L of the first opening 1111, it may or may not overlap with the first side 1131).

[0072] Furthermore, referring to Figures 1-3, in some embodiments, the first drip tray 140 and / or the second drip tray 150 may be provided with overflow holes 500. The overflow holes 500 can pass through the first plate 112 to connect the interior of the housing assembly 110 with the exterior of the housing assembly 110 (specifically, it can be a pipe connecting the exterior of the housing assembly 110) to facilitate the drainage of condensate. There may be multiple overflow holes 500. Referring to Figures 1-3, in the illustrated embodiments, both the first drip tray 140 and the second drip tray 150 are provided with two overflow holes 500.

[0073] To make the installation of sensor 130 more stable, referring to Figures 4-5, in some embodiments, the first water receiving tray 140 includes a side plate 141 near the first opening 1111, and sensor 130 is located on the side of side plate 141 facing the external connector 122. This allows sensor 130 to be closer to the first water receiving tray 140 and the external connector 122. Furthermore, one end of sensor 130 can abut against the side wall of side plate 141 away from the first opening 1111. This arrangement allows sensor 130 to receive further positioning or support by abutting against side plate 141, in addition to connecting to the first plate 112 and / or the second plate 113.

[0074] Based on the positioning or support provided by the sidewalls, further referring to Figures 4-5, in some embodiments, the sensor 130 includes a sensing body 131 and a fixing bracket 132. The fixing bracket 132 connects the first plate 112 and / or the second plate 113, and the sensing body 131 is connected to the fixing bracket 132. Thus, the fixing bracket 132 can serve to position and install the sensing body 131, and the connection method between the fixing bracket 132 and the first plate 112 and / or the second plate 113, as well as the connection method with the sensing body 131, can be determined according to requirements; for example, a bolt connection can be used. Therefore, in some embodiments, the end of the fixing bracket 132 facing the side plate 141 is provided with a stepped portion 1321. The stepped portion 1321 has a first stepped surface 13211 that fits against the first plate 112 and / or the second plate 113, and a second stepped surface 13212 that fits against the side wall of the side plate 141 away from the first opening 1111 (the fitting described in this application can be a complete fitting or a partial fitting). The second stepped surface 13212 is located on the side of the first stepped surface 13211 that is closer to the heat exchanger 120. It is understood that the side plate 141 of the first water receiving tray 140 can be set close to the first plate 112 and / or the second plate 113. If the fixing bracket 132 needs to connect the first plate 112 and / or the second plate 113, the fixing bracket 132 can also be connected to the side plate 141 to make the installation of the fixing bracket 132 more stable. To enable the fixed bracket 132 to simultaneously engage with the first plate 112 and / or the second plate 113, as well as the side plate 141, the first stepped surface 13211 of the stepped portion 1321 adheres to the first plate 112 and / or the second plate 113. Furthermore, since the second stepped surface 13212 connects to the first stepped surface 13211 and extends away from the first opening 1111 (i.e., towards the heat exchanger 120), the second stepped surface 13212 bends and extends to the side wall facing the side plate 141 away from the first opening 1111, thus adhering to the side plate 141. This arrangement enhances the installation stability of the fixed bracket 132, making it less prone to loosening. In addition, the step portion 1321 can also have a pressing or limiting function. Specifically, the first plate 112 and / or the second plate 113 and / or the side plate 141 can be provided with a mating structure that can interlock with the step portion 1321, or a limiting structure that can abut against the step portion 1321 and limit the displacement of the step portion 1321 (which can cause the step portion 1321 to disengage under external force). This makes it easier to install and position the fixed bracket 132, and the installation is more stable.

[0075] Furthermore, based on the sensor body 131 and the fixed bracket 132 defined in the above embodiments, referring to Figures 4-5, the placement of the sensor body 131 can be configured in various ways. Firstly, in some embodiments, the sensor body 131 is connected to the side of the fixed bracket 132 facing the heat exchanger 120. This configuration improves the detection effect of the sensor body 130 on the heat exchanger 120. Secondly, in some embodiments, the sensor body 131 includes a detection port 1311 suitable for conducting the heat exchange medium, and the detection port 1311 is disposed away from the fixed bracket 132. This configuration allows the detection port 1311 to extend outward relative to the fixed bracket 132, resulting in better detection performance. Thirdly, in some embodiments, the fixed bracket 132 includes a water-blocking portion 1322, which is disposed on the side of the sensor body 131 along the axial direction L perpendicular to the first opening 1111. Specifically, the water-blocking part 1322 serves to shield the sensor body 131 from liquid. Therefore, the water-blocking part 1322 can be positioned between the sensor body 131 and a location on the heat exchanger 120 (or indoor unit 100) prone to leakage or dripping. To prevent liquid accumulation on the water-blocking part 1322, it can be plate-shaped and inclined relative to the horizontal direction, allowing liquid to slide off. Fourthly, in some embodiments, the fixing bracket 132 is connected to the first plate 112 and located on the side of the first plate 112 near the second plate 113. Since the first plate 112 and the second plate 113 are separable, the fixing bracket 132 and the sensor body 131 can be more easily installed or maintained by removing the second plate 113. Furthermore, the sensor body 131 includes a terminal 1312, which can be located on the side of the sensor body 131 opposite to the second plate 113. By moving the terminal 1312 away from the first plate 112, the wiring arrangement of the sensor body 131 and the maintenance operations (disassembly and assembly operations of the second plate 113) can be located on both sides of the sensor body 131, so that the two are less likely to interfere with each other.

[0076] Referring to Figures 2 and 6, in some embodiments, the second plate 113 is detachably connected to the first plate 112. The first plate 112 includes a first connecting side 1123 connected to the second plate 113, and the second plate 113 includes a second connecting side 1133 connected to the first plate 112. The first connecting side 1123 and the second connecting side 1133 are stacked, with the first connecting side 1123 located on the side of the second connecting side 1133 facing the heat exchanger 120, or the second connecting side 1133 located on the side of the first connecting side 1123 facing the heat exchanger 120. This arrangement allows the first plate 112 and the second plate 113 to be connected through the overlapping portion of the first connecting side 1123 and the second connecting side 1133, making the connection between the two more reliable.

[0077] Furthermore, based on the above embodiments, referring to Figures 2 and 6, in some embodiments, the sensor 130 is connected to the first connecting side 1123, and the indoor unit 100 further includes a first connector 160, which passes through the first connecting side 1123 and connects to the sensor 130. The second connecting side 1133 is provided with a clearance groove 11331 for avoiding the first connector 160. It is understood that the first connector 160 can connect the first plate 112 and the sensor 130 by passing through the first connecting side 1123, and the clearance groove 11331 keeps the first connector 160 and the second plate 113 apart, meaning that the assembly and disassembly of the second plate 113 does not affect the connection between the first plate 112 and the sensor 130. In addition, in some embodiments, the indoor unit 100 further includes a third connector 170, which passes through the second connecting side 1133 and the first connecting side 1123 and connects to the sensor 130. It is understandable that the third connector 170 can pass through the first connecting side 1123 and the second connecting side 1133 to connect the first plate 112 and the sensor 130. Considering the above-described configuration of the first connector 160 and the third connector 170, for the need to inspect the sensor 130 (or other components inside the indoor unit 100), on the one hand, the operator can remove the third connector 170 to remove the second plate 113. At this time, the first connector 160 passes through the first connecting side 1123 and connects to the sensor 130, so the sensor 130 remains connected to the first plate 112. Therefore, removing the second plate 113 does not affect the installation and positioning of the sensor 130; on the other hand... When it is necessary to remove sensor 130, in some installation methods, sensor 130 needs to be supported to stably remove it. Therefore, the above-mentioned design allows the operator to first remove the second plate 113 by removing the third connector 170, thereby exposing part of the first opening 1111. At this time, sensor 130 is still connected to the first plate 112. The operator can then insert their hand or a tool into the first opening 1111 to stabilize sensor 130, so as to remove sensor 130 by removing the first connector 160. In addition, the third connector 170 can also connect the first plate 112 and the second plate 113, thereby simplifying the connection structure. The third connector 170 can not only stabilize the connection of sensor 130, but also connect the first plate 112 and the second plate 113, without the need for an additional connector to connect the first plate 112 and the second plate 113.

[0078] Furthermore, referring to Figure 12, in some other embodiments, the second connecting side 1133 is located on the side of the first connecting side 1123 facing the heat exchanger 120, the sensor 130 is connected to the second connecting side 1133, the indoor unit 100 also includes a second connector 600, the second connector 600 passes through the second connecting side 1133 and connects to the sensor 130, and the first connecting side 1123 is provided with a relief groove 11331 for avoiding the second connector 600.

[0079] Referring to Figures 2 and 6, the structural arrangement of the first plate 112 and the second plate 113 is defined as follows: the first direction X is perpendicular to the axial direction L of the first opening 1111, and the second direction Y is perpendicular to both the first direction X and the axial direction L. Based on this, in some embodiments, the first plate 112 is located at the boundary between one side of the first opening 1111 along the first direction X and the other side of the first opening 1111 along the second direction Y. The side of the first plate 112 opposite to the first direction X is designated as the second side 1121, and the side opposite to the second direction Y is designated as the third side 1122. The second side 1121 and the third side 1122 are arranged adjacent to each other. The second plate 113 has a first side 1131 connecting the third side 1122 and a fourth side 1132 connecting the second side 1121. It is understood that the first plate 112 can be located at the edge of the first opening 1111. Referring to Figures 2 and 6, in the illustrated embodiment, the edge of the first opening 1111 is rectangular, and the first plate 112 is located at the apex of this rectangle and is also rectangular. Therefore, the second plate 113 can have a fourth side 1132 opposite to the first plate 112 along the first direction X and a first side 1131 opposite to the first plate 112 along the second direction Y. The fourth side 1132 connects to the second side 1121, and the first side 1131 connects to the third side 1122. Combining the rectangular first opening 1111 and the first plate 112 in the above embodiment, the second plate 113 can be L-shaped, and the two folded edges of the L-shape correspond to the first side 1131 and the fourth side 1132. By configuring the first plate 112 and the second plate 113 as described above, the shapes of the first plate 112 and the second plate 113 can be better matched, and the installation is more stable and the positioning is more convenient. In addition, in conjunction with the aforementioned embodiment regarding the first connecting side 1123 and the second connecting side 1133, when the first side 1131 is connected to the third side 1122, the first side 1131 is the second connecting side 1133, and the third side 1122 is the first connecting side 1123.

[0080] An embodiment of the second aspect of this application also provides an air handling unit, including an indoor unit 100, an outdoor unit, and a duct assembly of any of the above embodiments, the duct assembly connecting the indoor unit 100 and the outdoor unit. The outdoor unit includes a first internal connector 190.

[0081] For details regarding the various configurations of the air handling unit, please refer to the relevant descriptions and technologies of the foregoing embodiments; further details will not be repeated here. Thanks to the improvements made to the indoor unit 100 in the foregoing embodiments, the air handling unit of the second aspect of this application has the same technical effects as the indoor unit 100 in the foregoing embodiments. Further details will not be repeated here.

[0082] The above are merely some embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made based on the content of the specification and drawings of this application under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. Indoor unit, including: A housing assembly defining a first chamber, the housing assembly including a first plate having a first through hole and a second through hole communicating with the first chamber; A heat exchanger is disposed in the first chamber, and the heat exchanger includes a first external connector, which passes through the first through hole; The first conversion tube has one end adapted to connect to the first external connector and the other end adapted to connect to the first internal connector of the outdoor unit. A sensor for detecting the concentration of the heat exchange medium in its surroundings, the sensor being disposed within the housing assembly; as well as A flow guiding assembly is adapted to connect to the side wall of the first plate away from the first chamber and sleeved on the outside of the first external connector, the first conversion tube and the first internal connector. The flow guiding assembly is adapted to form a first flow guiding cavity communicating with the second through hole and / or the first through hole together with the first plate, the first external connector, the first conversion tube and the first internal connector.

2. The indoor unit as described in claim 1, wherein, The flow guiding assembly includes a fixing block and a first sleeve; The fixing block is adapted to be connected to the wall surface of the first plate away from the first chamber. The fixing block has a third through hole that communicates with the first through hole and the second through hole respectively. The first external connector passes through the third through hole and is clearance-fitted with the third through hole. One end of the first sleeve is adapted to be connected to the fixing block, and the first sleeve is adapted to be sleeved on the outside of the first external connector, the first conversion tube and the first internal connector and connected to the outer peripheral wall of the first internal connector.

3. The indoor unit as described in claim 2, wherein, The fixing block includes a base and a boss protruding from the base. The third through hole penetrates the base and the boss, and the first sleeve is adapted to be fitted around the outer periphery of the boss.

4. The indoor unit as described in claim 3, wherein, The flow guiding assembly further includes a first binding member and a second binding member. The first binding member is adapted to be sleeved on one end of the first sleeve and connect the first sleeve to the boss. The second binding member is adapted to be sleeved on the other end of the first sleeve and connect the first sleeve to the first inner connector.

5. The indoor unit as described in any one of claims 2 to 4, wherein, Along a direction perpendicular to the axis of the first through hole, one side of the first through hole connects to the second through hole.

6. The indoor unit as described in claim 5, wherein, The first plate body includes a plate body and an assembly block. The plate body is provided with an assembly opening, which includes a first region and a second region. The assembly block is detachably connected to the plate body and covers the first region. The second region includes a first through hole and a second through hole.

7. The indoor unit as described in claim 6, wherein, The second region also includes a fourth through hole and a fifth through hole, wherein the fourth through hole is connected to the second through hole and is spaced apart from the first through hole; The heat exchanger also includes a second external connector, which extends out of the first chamber through the fourth through hole; The indoor unit also includes a second conversion pipe, one end of which is adapted to connect to the second external connector, and the other end of which is adapted to connect to the second internal connector of the outdoor unit; The fixing block is provided with a sixth through hole that communicates with the fourth through hole and the fifth through hole respectively; the second external connector passes through the sixth through hole and is clearance-fitted with the sixth through hole; and The flow guiding assembly further includes a second sleeve, one end of which is adapted to connect to the fixing block, and the second sleeve is adapted to be sleeved outside the second external connector, the second conversion tube and the second internal connector and connected to the outer peripheral wall of the second internal connector, so as to define a second flow guiding cavity communicating with the fifth through hole and / or the fourth through hole together with the second external connector, the second conversion tube and the second internal connector.

8. The indoor unit as described in any one of claims 2 to 7, wherein, The elastic modulus of the material of the first sleeve is less than that of the material of the first conversion tube; and / or The elastic modulus of the base material is less than that of the material of the first external connector.

9. The indoor unit as described in any one of claims 1 to 8, wherein, The first conversion tube is adapted to be threadedly connected to the first external connector; and / or The first conversion tube is adapted to be welded to the first internal connector.

10. The indoor unit as described in any one of claims 1 to 9, wherein, The sensor is connected to the first plate; and / or The sensor is located below the second through hole.

11. An air handling unit, comprising: The indoor unit according to any one of claims 1-10; as well as Outdoor unit, including the first internal connector; Wherein, one end of the first conversion tube is connected to the first external connector, and the other end is connected to the first internal connector; the flow guiding component is connected to the side wall of the first plate away from the first chamber and is sleeved on the outside of the first external connector, the first conversion tube and the first internal connector, and the flow guiding component together with the first plate, the first external connector, the first conversion tube and the first internal connector to form a first flow guiding cavity that communicates with the second through hole.

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