Indoor unit and air treatment unit

Abstract

The utility model provides an indoor unit and an air processing unit. The indoor unit comprises a shell assembly, a heat exchanger, a first conversion pipe, a sensor and a flow guide assembly. A first cavity is defined by the shell assembly, the shell assembly comprises a first plate body, and the first plate body is provided with a first through hole and a second through hole which are communicated with the first cavity. The heat exchanger is arranged in the first cavity and comprises a first external connector, and the first external connector is arranged in the first through hole in a penetrating mode. The sensor is arranged in the shell assembly. The flow guide assembly is suitable for being connected with the side wall, away from the first cavity, of the first plate body and arranged outside the first external connector, the first conversion pipe and the first internal connector in a sleeving mode. The flow guide assembly is suitable for forming a first flow guide cavity communicating with the second through hole together with the first plate body, the first external connector, the first conversion pipe and the first internal connector. The internal and external leakage phenomena can be detected while the cost is saved, and the detection effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an indoor unit and an air processing unit. Background Art

[0002] Air conditioner indoor units utilize refrigerant to achieve cooling. Refrigerant leaks can affect the air conditioner's normal operation, pose health risks, create safety hazards, and pollute the environment. Therefore, refrigerant sensors are required to detect refrigerant leaks in air conditioner indoor units. Related technologies typically focus on using refrigerant sensors to detect refrigerant leaks inside the air conditioner indoor unit. However, detecting leaks outside the air conditioner requires a separate refrigerant sensor, which is costly. Utility Model Content

[0003] The main purpose of the utility model is to provide an indoor unit and an air handling unit, which can detect internal and external leakage while saving costs, and the detection effect is better.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions:

[0005] Indoor unit, including:

[0006] A housing assembly defines a first chamber, the housing assembly comprising a first plate, the first plate having a first through hole and a second through hole respectively communicating with the first chamber;

[0007] a heat exchanger disposed in the first chamber, the heat exchanger comprising a first external connector, the first external connector being disposed through the first through hole;

[0008] a first conversion tube, one end of which is adapted to be connected to the first external connector and the other end of which is adapted to be connected to the first internal connector of the outdoor unit;

[0009] A sensor for detecting the concentration of the heat exchange medium around itself, wherein the sensor is arranged in the housing assembly;

[0010] A flow guide assembly is adapted to connect to the side wall of the first plate body facing away from the first chamber and to be sleeved outside the first external joint, the first conversion tube, and the first internal joint. The flow guide assembly is adapted to form a first flow guide cavity connected to the second through hole together with the first plate body, the first external joint, the first conversion tube, and the first internal joint.

[0011] In some embodiments, the flow guide assembly includes a fixing block and a first sleeve;

[0012] The fixing block is adapted to be connected to a wall surface of the first plate facing away from the first chamber, the fixing block is provided with a third through hole connected to the first through hole and the second through hole respectively, the first external connector is passed through the third through hole and is in clearance fit with the third through hole;

[0013] One end of the first sleeve is suitable for connecting to the fixing block, and the first sleeve is suitable for being sleeved outside the first external joint, the first conversion tube and the first internal joint and connected to the outer peripheral wall of the first internal joint.

[0014] In some embodiments, the fixing block includes a base and a boss protruding from the base, the third through hole passes through the base and the boss, and the first sleeve is suitable for being sleeved on the outer periphery of the boss.

[0015] In some embodiments, the guide assembly also includes a first binding member and a second binding member, the first binding member is suitable for being sleeved on one end outside the first sleeve and connecting the first sleeve and the boss, and the second binding member is suitable for being sleeved on the other end outside the first sleeve and connecting the first sleeve and the first internal joint.

[0016] In some embodiments, along a direction perpendicular to the hole axis of the first through hole, one side of the first through hole is connected to the second through hole.

[0017] In some embodiments, the first plate body includes a plate body and an assembly block, the plate body is provided with an assembly port, the assembly port includes a first area and a second area, the assembly block is detachably connected to the plate body and covers the first area, and the second area includes the first through hole and the second through hole.

[0018] In some embodiments, the second region further includes a fourth through hole and a fifth through hole, the fourth through hole being connected to the second through hole, and the fourth through hole being spaced apart from the first through hole;

[0019] The heat exchanger further includes a second external connector, the second external connector being provided through the fourth through hole to exit the first chamber;

[0020] The indoor unit further comprises a second conversion tube, one end of the second conversion tube being adapted to be connected to the second external connector and the other end being adapted to be connected to the second internal connector of the outdoor unit;

[0021] The fixing block is provided with a sixth through hole which is in communication with the fourth through hole and the fifth through hole respectively, and the second external connector is passed through the sixth through hole and is in clearance fit with the sixth through hole;

[0022] The flow guide assembly also includes a second sleeve, one end of which is suitable for connecting to the fixed block, and the second sleeve is suitable for being sleeved outside the second external joint, the second conversion tube and the second internal joint and connected to the outer peripheral wall of the second internal joint, so as to jointly define a second flow guide cavity connected to the fifth through hole with the second external joint, the second conversion tube and the second internal joint.

[0023] In some embodiments, the elastic modulus of the material of the first sleeve is smaller than the elastic modulus of the material of the first converter tube;

[0024] and / or,

[0025] The elastic modulus of the material of the base is smaller than the elastic modulus of the material of the first external connector.

[0026] In some embodiments, the first conversion tube is adapted to be threadedly connected to the first external connector;

[0027] and / or,

[0028] The first conversion tube is suitable for being welded to the first inner joint.

[0029] In some embodiments, the sensor is connected to the first plate;

[0030] and / or,

[0031] The sensor is located below the second through hole.

[0032] The embodiment of the second aspect of the present utility model further provides an air handling unit, comprising the indoor unit and the outdoor unit of any one of the above embodiments; the outdoor unit comprises the first internal connection joint;

[0033] One end of the first conversion tube is connected to the first external joint, and the other end is connected to the first internal joint; the flow guide component is connected to the side wall of the first plate body facing away from the first chamber and is sleeved outside the first external joint, the first conversion tube and the first internal joint. The flow guide component, the first plate body, the first external joint, the first conversion tube and the first internal joint together form a first flow guide cavity connected to the second through hole.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] In the solution of the present invention, on the basis of the sensor being arranged inside the shell assembly, a flow guide assembly is also placed outside the shell assembly by placing it outside the first external connector, the first conversion tube, and the first internal connector to form a first flow guide cavity of the flow guide assembly, and the first flow guide cavity of the flow guide assembly is connected to the first chamber of the shell assembly through a second through hole, so that the sensor can detect leakage phenomena occurring inside the shell assembly and leakage phenomena outside the shell assembly at the position where the flow guide assembly is placed. In order to detect internal and external leakage phenomena at the same time, compared with the detection method of the related art in which sensors are set both inside and outside the shell assembly, the detection method of the present invention can be completed using at least one sensor, thereby reducing costs. Furthermore, because the flow guide assembly is placed simultaneously on the part of the first external connector that extends outward relative to the shell assembly and the conversion interface part (i.e., the part where the first external connector, the first conversion tube, and the first internal connector are connected to each other), the sensor can at least detect leakage at the above two locations. Furthermore, because the present invention utilizes a sleeved design to connect the first flow guide cavity of the flow guide assembly with the first chamber of the housing assembly, the volume of the first flow guide cavity is reduced, resulting in a faster sensor detection response. Furthermore, the flow guide assembly can be sleeved only over the first external connector and its connection portion. In this case, the sensor can more accurately identify the specific connector corresponding to the leak, resulting in improved detection accuracy. Therefore, the indoor unit of the present invention can detect both internal and external leaks while reducing costs, achieving improved detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0037] Figure 1 This is a first side perspective diagram of an indoor unit provided in one embodiment of the present utility model;

[0038] Figure 2 This is a front view schematic diagram of an indoor unit provided in one embodiment of the present utility model, wherein a portion of the housing body is removed and some parts obscured by the first plate are shown;

[0039] Figure 3 This is a second side perspective diagram of an indoor unit provided in one embodiment of the present utility model, wherein the second plate is removed;

[0040] Figure 4This is a three-dimensional schematic diagram of the combination of the first plate, the sensor and the first water receiving tray provided in one embodiment of the present invention;

[0041] Figure 5 for Figure 4 A partial enlarged schematic diagram of point A in the middle;

[0042] Figure 6 This is an exploded schematic diagram of the first plate, the second plate, the first connecting member, and the third connecting member provided in one embodiment of the present invention after being assembled;

[0043] Figure 7 This is a schematic top view of an indoor unit provided in one embodiment of the present utility model;

[0044] Figure 8 for Figure 7 Schematic cross-section in the middle BB direction;

[0045] Figure 9 for Figure 8 A partial enlarged schematic diagram of point C in the middle;

[0046] Figure 10 This is an exploded schematic diagram of the assembly of the flow guide assembly, the external connector, the first conversion tube, and the first internal connector provided in one embodiment of the present invention;

[0047] Figure 11 This is an exploded schematic diagram of the assembly of the flow guide assembly, the external connector, and the first plate provided in one embodiment of the present invention;

[0048] Figure 12 This is an exploded schematic diagram of the combination of the first plate body, the second plate body, the first connecting member and the second connecting member provided in another embodiment of the present invention.

[0049] Description of Figure Numbers:

[0050] Indoor unit 100;

[0051] 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 region 1128; second region 1129; second plate 113; first side 1131; fourth side 1132; second connecting side 1133; avoidance groove 11331; first chamber 114; fourth through hole 115; fifth through hole 116;

[0052] Heat exchanger 120; heat exchange pipeline 121; external connector 122; first external connector 122A; second external connector 122B;

[0053] Sensor 130; sensor body 131; detection port 1311; terminal 1312; fixing bracket 132; step portion 1321; first step surface 13211; second step surface 13212; water retaining portion 1322;

[0054] First water receiving tray 140; side plate 141;

[0055] Second water receiving tray 150;

[0056] a first connecting member 160;

[0057] a third connecting member 170;

[0058] First conversion tube 180;

[0059] first internal joint 190;

[0060] The guide assembly 200; the fixing block 210; the base 211; the boss 212; the first sleeve 220; the third through hole 230; the second sleeve 240; the first tying member 250; the second tying member 260; the sixth through hole 270;

[0061] A first flow guide cavity 300;

[0062] Second conversion tube 400;

[0063] Overflow hole 500;

[0064] A second connecting member 600;

[0065] Axis direction L;

[0066] First direction X;

[0067] The second direction Y.

[0068] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0070] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0071] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, 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 solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. 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 the present invention.

[0072] In the related art, the refrigerant sensor is connected to the air conditioner heat exchanger or to the air conditioner water pan. The location of the refrigerant sensor is affected by the location of the air conditioner heat exchanger, which makes the installation and maintenance of the refrigerant sensor difficult. The flexibility is poor, and it is difficult to take into account different air conditioner heat exchanger locations or various installation scenarios of the air conditioner indoor unit. More specifically, the inventor found that, on the one hand, the air conditioner indoor unit can be modular in design, that is, the heat exchanger can be installed or modified at any suitable location in the air conditioner indoor unit cavity according to needs; on the other hand, the air conditioner indoor unit can have a variety of installation methods. For example, the air conditioner indoor unit can be installed vertically or horizontally, and the above two installation methods can be reversed 180 degrees and further divided into two installation methods. Therefore, under different air conditioner indoor unit installation methods, the setting of connecting the refrigerant sensor to the heat exchanger or to the water pan cannot guarantee good detection results, and cannot guarantee the convenience of installation and maintenance.

[0073] In view of this, see Figures 1-12 In an embodiment of the first aspect of the present invention, an indoor unit 100 is provided, comprising a housing assembly 110, a heat exchanger 120, a first conversion tube 180, and a sensor 130. The indoor unit 100 can be used in any suitable type of air handling unit, and can be installed in various ways, such as wall-mounted, vertical, or ceiling-mounted. Alternatively, the indoor unit 100 can be installed in one of a variety of ways according to needs.

[0074] See also Figure 1-Figure 3 The housing assembly 110 defines a first chamber 114 . The housing assembly 110 includes a first plate 112 . The first plate 112 is provided with a first through hole 1124 and a second through hole 1125 , which are respectively connected to the first chamber 114 .

[0075] See also Figure 1-Figure 3 The housing assembly 110 includes a housing body 111, a first plate 112, and a second plate 113. The housing body 111 defines a first opening 1111. The first plate 112 and the second plate 113 are both connected to the housing body 111 and together cover the first opening 1111. The first plate 112 and the second plate 113 can both serve as panels on one side of the housing assembly 110 (which can be any suitable side). In some embodiments, the panel on one side of the housing assembly 110 can be formed by the first and second plates 112, 113 together. In other embodiments, the panel on one side of the housing assembly 110 can be formed only partially by the first and second plates 112, 113. Furthermore, the housing body 111 can include other panel portions of the housing assembly 110 besides the first and second plates 112, 113, so that the housing body 111, the first and second plates 112, 113 together form the outer shell of the indoor unit 100. The following definition defines both the first plate 112 and the second plate 113 as being detachably connected to the housing body 111: Taking the detachable connection of the second plate 113 to the housing body 111 as an example, the connection between the second plate 113 and the housing body 111 is detachable, and the detachment of the second plate 113 and the housing body 111 does not affect the installation and fixation of other structures (including the housing body 111 and the first plate 112). In other words, the second plate 113 can be detached independently. Furthermore, in some embodiments, the first plate 112 and the second plate 113 can also be detachably connected.

[0076] See also Figure 1-Figure 3 The main function of the heat exchanger 120 is to regulate the indoor temperature through heat exchange. The heat exchanger 120 is arranged in the shell assembly 110, that is, the shell assembly 110 itself defines a receiving cavity, and the heat exchanger 120 is arranged in the receiving cavity. The heat exchanger 120 includes a heat exchange pipeline 121 for transporting a heat exchange medium. The heat exchange pipeline 121 is provided with an external connector 122 on the side facing the first opening 1111. The external connector 122 is passed through the first plate body 112 and can be connected to the first plate body 112. The heat exchange medium can specifically be a refrigerant (or cold medium), and the heat exchange medium can be flammable. In different embodiments, the heat exchange medium can be in liquid, gaseous, or mixed state.

[0077] See also Figure 1-Figure 3The sensor 130 is used to detect the concentration of the heat exchange medium around it. The sensor is arranged in the shell assembly 110 and is connected to the first plate 112 and / or the second plate 113. It should be noted that in different embodiments, the detection function of the sensor 130 described in the present invention can be either intermittent detection at intervals or continuous monitoring. Depending on the type of heat exchange medium and the detection requirements, the sensor 130 can detect the concentration of the heat exchange medium in any appropriate manner. For example, the sensor 130 can be a gas sensor 130 and can sense the gas concentration or gas composition around it; or the sensor 130 can be a temperature sensor 130 and can sense the temperature around it, and then determine whether there is a leak of heat exchange medium around it based on the temperature sensing data, and further detect the concentration of the leaked heat exchange medium; or the sensor 130 can be an ultrasonic sensor 130 and can use ultrasonic signals to sense the gas flow around it, and then determine whether there is a leak of heat exchange medium around it based on the gas flow sensing data, and further detect the concentration of the leaked heat exchange medium.

[0078] See also Figure 1-Figure 3 as well as Figure 10-11 The heat exchanger 120 is disposed within the first chamber 114 and includes a first external connector 122A, which extends through the first through-hole 1124 and out of the first chamber 114. A first conversion tube 180 has one end adapted to connect to the first external connector 122A and the other end adapted to connect to the first internal connector 190 of the outdoor unit. It will be appreciated that the first external connector 122A extends outward from the housing assembly 110 to form an external pipe for the heat exchanger 120. The first conversion tube 180 is used to connect the piping of the heat exchanger 120 with the piping of the outdoor unit.

[0079] As can be seen, in the solution of the present invention, the sensor 130 is mounted on 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, installation and maintenance of the sensor 130 are more convenient and are not restricted by the location of the heat exchanger 120. Furthermore, the different locations of the heat exchanger 120 and the various installation and placement arrangements of the indoor unit 100 do not affect the installation, maintenance, or functionality of the sensor 130. Therefore, the indoor unit 100 of the present invention makes installation and maintenance of the sensor 130 more convenient.

[0080] See also Figure 7-11The indoor unit 100 may further include a flow guide assembly 200, which is suitable for connecting to the side wall of the first plate body 112 away from the first chamber 114 and being sleeved outside the first external joint 122A, the first conversion tube 180 and the first internal joint 190. The flow guide assembly 200 is suitable for jointly defining a first flow guide cavity 300 communicating with the second through hole 1125 with the first plate body 112, the first external joint 122A, the first conversion tube 180 and the first internal joint 190. It can be understood that the guide component 200 can be mounted on the outside of the first external joint 122A, the first conversion tube 180 and the first internal joint 190 to form the first guide cavity 300 of the guide component 200. Based on this, the second through hole 1125 can connect the first guide cavity 300 formed by the guide component 200 and the first chamber 114 of the shell component 110. Since the sensor 130 is arranged in the shell component 110, the sensor 130 can detect whether there is a leakage in the shell component 110, and can also detect whether there is a leakage outside the shell component 110 at the position where the guide component 200 is mounted.

[0081] See also Figure 7-11 In some embodiments, the flow guide 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 facing away from the first chamber 114. The fixing block 210 is provided with a third through hole 230 that is connected to the first through hole 1124 and the second through hole 1125, respectively. It should be noted that in some embodiments, the same portion of the third through hole 230 can be connected to both the first through hole 1124 and the second through hole 1125; in other embodiments, two different portions of the third through hole 230 can be connected to the first through hole 1124 and the second through hole 1125, respectively. Furthermore, in different embodiments, the first through hole 1124 and the second through hole 1125 can be spaced apart from each other or connected to each other. In some embodiments, along a direction perpendicular to the axis of the first through hole 1124, one side of the first through hole 1124 is connected to the second through hole 1125. The first external connector 122A is disposed through the third through hole 230 and is loosely fitted therewith. One end of the first sleeve 220 is adapted to be connected to the fixing block 210 . The first sleeve 220 is adapted to be sleeved outside the first external joint 122A, the first conversion tube 180 and the first internal joint 190 and connected to the outer peripheral wall of the first internal joint 190 .

[0082] Further, based on the fixing block 210 and the first sleeve 220 defined in the above embodiment, see Figure 7-11In some embodiments, the fixing block 210 includes a base 211 and a boss 212 protruding from the base 211. The third through hole 230 passes through the base 211 and the boss 212. The first sleeve 220 is adapted to be sleeved around the outer periphery of the boss 212. This arrangement provides a more stable connection between the first sleeve 220 and the fixing block 210 and facilitates disassembly.

[0083] Furthermore, based on the boss 212 and the first sleeve 220 provided in the above embodiment, see Figure 7-11 In some embodiments, the flow guide assembly 200 further includes a first binding member 250 and a second binding member 260, see Figure 8 The first binding member 250 is suitable for being mounted on one end of the first sleeve 220 and tightening the connection between the first sleeve 220 and the boss 212. The second binding member 260 is suitable for being mounted on the other end of the first sleeve 220 and tightening the connection between the first conversion tube 180 and the first internal joint 190. Through the above arrangement, the first binding member 250 and the second binding member 260 can achieve a better 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 internal joint 190. For details, see Figure 10 , the first binding member 250 and the second binding member 260 can both be throat clamps.

[0084] In addition, see Figure 7-11 In some embodiments, the first through hole 1124 and the second through hole 1125 are connected to each other. This arrangement can make the processing of the first plate 112 more convenient and reduce the processing cost. In other embodiments, the first through hole 1124 and the second through hole 1125 can be spaced apart as needed.

[0085] Furthermore, the first through hole 1124 and the second through hole 1125 are connected to each other based on the above embodiment. Figure 7-11In some embodiments, first plate 112 includes a plate body 1126 and an assembly block 1127. Plate body 1126 has an assembly opening, which includes a first region 1128 and a second region 1129. Assembly block 1127 is detachably connected to plate body 1126 and covers first region 1128. Second region 1129 includes a first through-hole 1124 and a second through-hole 1125. With this arrangement, when installing or removing first external connector 122A, the user can first detach assembly block 1127 from plate body 1126 and then reattach assembly block 1127 to plate body 1126. Therefore, the detachable assembly block 1127 facilitates installation and removal of first external connector 122A. In addition, by installing the assembly block 1127 on the plate body 1126, the first area 1128 is blocked and the second area 1129 (the first through hole 1124 and the second through hole 1125) is exposed, so that the size and shape of the blocked first area 1128 depend on the assembly block 1127, thereby making the first through hole 1124 and the second through hole 1125 easier to design and easier to adjust through the assembly block 1127.

[0086] Further, based on the plate body 1126 and the assembly block 1127 provided in the above embodiment, see Figure 7-11In some embodiments, the second region 1129 further includes a fourth through hole 115 and a fifth through hole 116. The fourth through hole 115 is connected to the second through hole 1125. The fourth through hole 115 is spaced apart from the first through hole 1124 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 first chamber 114 at the fourth through hole 115. The indoor unit 100 further includes a second conversion tube 400. One end of the second conversion tube 400 is suitable for connecting to the second external connector 122B, and the other end is suitable for connecting to the second internal connector of the outdoor unit. The fixing block 210 is provided with a sixth through hole 270 which is respectively connected to the fourth through hole 115 and the fifth through hole 116. The second external connector 122B is connected to the second internal connector of the outdoor unit. B is passed through the sixth through hole 270 and is loosely fitted with the sixth through hole 270; the flow guide assembly 200 also includes a second sleeve 240, one end of which is suitable for connecting to the fixed block 210, and the second sleeve 240 is suitable for being sleeved on the outside of the second external joint 122B, the second conversion tube 400 and the second internal joint and connected to the outer peripheral wall of the second internal joint, so as to jointly define a second flow guide cavity connected to the fifth through hole 116 with the second external joint 122B, the second conversion tube 400 and the second internal joint. It can be understood that the above-mentioned second external connector 122B and second sleeve 240 are similar to the settings of the first external connector 122A and the first sleeve 220 in the aforementioned embodiment (and the settings of the second external connector 122B and the second sleeve 240 can refer to the relevant settings of the first external connector 122A and the first sleeve 220), the difference is that the second external connector 122B can serve as another connector extending outward relative to the shell assembly 110 (its function can be the same as or different from 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, and the second external connector 122B can be an output connector for discharging refrigerant).

[0087] Furthermore, in some embodiments, the elastic modulus of the material of the first sleeve 220 is lower than that of the material of the first conversion tube 180. This arrangement allows the first sleeve 220 to deform more easily than the first conversion tube 180. Therefore, when the first conversion tube 180 bends (or when the first conversion tube 180 requires resizing), the first sleeve 220 can be deformed to conform to the structure of the first conversion tube 180, allowing it to be fitted over the first conversion tube 180. This arrangement allows for greater flexibility in the placement of the first sleeve 220 and facilitates installation. Specifically, the material of the first sleeve 220 can be PE cotton or any other suitable soft material. Furthermore, in some embodiments, the elastic modulus of the material of the base 211 is lower than that of the material of the first external connector 122A. This arrangement makes base 211 more easily deformable than first external connector 122A. Therefore, when the structure of first external connector 122A is complex (or when the specifications of first external connector 122A need to be changed), base 211 can be directly deformed to adapt to the structure of first external connector 122A, allowing base 211 to be fitted over first external connector 122A. This arrangement facilitates installation and connection of base 211 and reduces vibration caused by the rigid connection between base 211 and first external connector 122A. Specifically, base 211 can be made of rubber or any other suitable soft material.

[0088] Furthermore, in some embodiments, the first conversion tube 180 is adapted to be threadedly connected to the first external connector 122A. This arrangement facilitates assembly and disassembly of the connection between the first conversion tube 180 and the first external connector 122A, and facilitates sealing. Furthermore, in some embodiments, the first conversion tube 180 is adapted to be welded to the first internal connector 190. This arrangement provides a more secure connection between the first conversion tube 180 and the first internal connector 190, and facilitates sealing.

[0089] Combined with the previous housing assembly 110, see Figure 1-Figure 3, the sensor 130 is arranged in the shell assembly 110 and is 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 a fixed connection or a detachable connection. At the same time, the connection of the sensor 130 to the first plate 112 and / or the second plate 113 means that the sensor 130 can be connected to either the first plate 112 and the second plate 113, or the sensor 130 can be connected to the first plate 112 and the second plate 113 at the same time. The above arrangement allows the sensor 130 to be installed by relying on the first plate 112 and / or the second plate 113, and since both the first plate 112 and the second plate 113 can be detachably connected to the shell body 111, it is more convenient to install or repair the sensor 130, and is not limited to the setting position of the heat exchanger 120. For example, taking the case where the sensor 130 is only connected to the first plate 112, when the sensor 130 needs to be installed or repaired, one way to handle it is to remove the second plate 113 alone, and the first plate 112 and the sensor 130 can be installed in the original position, so that the operator can put his hands or tools into the shell assembly 110 to install or repair the sensor 130, and there is a larger operating space; in addition, another way to handle it is to remove the first plate 112 alone, and the sensor 130 is also removed at the same time, and the second plate 113 can be installed in the original position, which makes it easier for the operator to further handle the sensor 130.

[0090] Combined with the previous heat exchanger 120, the different setting positions of the heat exchanger 120 and various installation and placement methods of the air-conditioning 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 changes in the setting position of the heat exchanger 120 or the changes in the installation method of the air-conditioning indoor unit 100, which cause other structures to block the heat exchange medium and cause the detection accuracy of the sensor 130 to deteriorate, or cause the sensor 130 to hinder the installation of other structures.

[0091] In addition, while the sensor 130 can detect the concentration of the heat exchange medium around the heat exchanger 120, since the external joint 122 is arranged 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 joint 122, thereby making the detection function of the sensor 130 more comprehensive and helping to reduce costs.

[0092] In order to ensure that the sensor 130 has a better detection effect on the concentration of the heat exchange medium around the heat exchanger 120, see Figure 2 and Figure 3In some embodiments, a plane perpendicular to the axial direction L of the first opening 1111 is a 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 orthographic projection and the second orthographic projection 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 may 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. Therefore, the at least partial overlap of the first orthographic projection and the second orthographic projection can bring the sensor 130 closer to the heat exchanger 120 and improve detection effectiveness.

[0093] Regarding the specific connection method of the sensor 130, in the first connection method, the sensor 130 is connected to the first plate 112 and is located on the side of the first plate 112 close to the second plate 113. The side of the first plate 112 close to the second plate 113 is the side adjacent to the first plate 112 and the second plate 113. If there are multiple adjacent sides, the sensor 130 can be installed on any of the sides, or on the side close to the heat exchanger 120 and the external connector 122. It can be 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 is provided through the first plate 112 and connected to the first plate 112, the first plate 112 in some embodiments is not easy to disassemble. Therefore, the sensor 130 can be set on the side of the first plate 112 close to the second plate 113. After the second plate 113 is removed, the sensor 130 is closer to the first opening 1111 exposed due to the removal of the second plate 113, and the user can more conveniently install and repair the sensor 130 through the exposed first opening 1111.

[0094] In the second connection mode, the sensor 130 is connected to the second plate 113, and the sensor 130 is located on the side of the second plate 113 near the external connector 122. It is understandable that the sensor 130 can be connected to the second plate 113 without being connected to the first plate 112. Based on this, in some embodiments, because the external connector 122 passes through the first plate 112 and is connected to the first plate 112, the first plate 112 is not easy to remove. Therefore, the sensor 130 can be set on the second plate 113, so that the sensor 130 can be removed together with the second plate 113, thereby making it easier to install and repair the sensor 130. In addition, the location of the sensor 130 on the side of the second plate 113 near the external connector 122 also allows the sensor 130 to better detect the concentration of the heat exchange medium around the external connector 122.

[0095] See also Figure 2 and Figure 6 In the third connection mode, the sensor 130 is connected to the first plate 112 and the second plate 113, respectively. When viewed along the axis L of the first opening 1111, the sensor 130 at least partially overlaps with the first plate 112, and the sensor 130 at least partially overlaps with the second plate 113. It is understood that connecting the sensor 130 to both the first plate 112 and the second plate 113 can improve the connection stability of the sensor 130.

[0096] It should be noted that, in the three aforementioned connection methods, the connection between the sensor 130 and the first plate 112 and / or the second plate 113 can be direct (e.g., connecting to the first plate 112 and / or the second plate 113 through an opening or other structure provided by the sensor 130) or indirect (e.g., connecting the sensor 130 to the fixing bracket 132, and the fixing bracket 132 to the first plate 112 and / or the second plate 113). The definition of the sensor 130 being located at the side and at the intersection is determined by projection. For example, the definition of the sensor 130 being located at the side of the first plate 112 near the second plate 113 is defined as an overlap between 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 along the axis L of the first opening 1111.

[0097] See also Figure 3-Figure 5 In some embodiments, the indoor unit 100 further includes a first water receiving pan 140, which is used to collect and drain condensed water. The first water receiving pan 140 can have any suitable structural shape as needed, and can be connected to the heat exchanger 120 or the housing body 111. Therefore, in some embodiments, the first water receiving pan 140 is disposed within the housing assembly 110 and is located on one side of the heat exchanger 120 along a first direction X, which is perpendicular to the axial direction L of the first opening 1111. The first water receiving pan 140 is used to collect condensed water that falls from the outer wall of the heat exchanger 120 along the first direction X. Along the first direction X, the sensor 130 can be located on the side of the first water receiving pan 140 near the external connector 122. This arrangement enables the sensor 130 to effectively detect the concentration of the heat exchange medium around both the external connector 122 and the first water receiving pan 140.

[0098] For a more comprehensive water collection effect, see Figure 3-Figure 5In some embodiments, the indoor unit 100 further includes a second water receiving pan 150. The second water receiving pan 150 is disposed within the housing assembly 110 and is located on one side of the heat exchanger 120 along a 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 receiving pan 150 is used to collect condensed water that falls from the outer wall of the heat exchanger 120 along the second direction Y. It is understood that the second water receiving pan 150 and the first water receiving pan 140 both serve the same function of collecting condensed water. The difference lies in the different locations of the second water receiving pan 150 and the first water receiving pan 140, thereby accommodating condensed water that falls from different directions. Therefore, 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 receiving pan 140 is located below the heat exchanger 120. In the second installation state, the second water receiving pan 150 is located below the heat exchanger 120. In actual use and installation scenarios of the indoor unit 100, the indoor unit 100 can have various orientation angles (or can be installed in various manners). The above configuration allows the indoor unit 100 to have various orientation angles while at least one of the first water receiving tray 140 and the second water receiving tray 150 can effectively collect condensed water. 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. Thus, the indoor unit 100 can effectively collect condensed water whether installed vertically or horizontally.

[0099] Furthermore, based on the above embodiment, the first water receiving tray 140 and the second water receiving tray 150 are arranged. In order to enable the sensor 130 to 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 close to the second water receiving tray 150. Alternatively, see Figure 4-Figure 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 a side of the external connector 122 close to the first side 1131 (along the axial direction L of the first opening 1111, it may overlap with the first side 1131 or may not overlap with it).

[0100] In addition, see Figure 1-Figure 3 In some embodiments, the first water receiving tray 140 and / or the second water receiving tray 150 may be provided with an overflow hole 500. The overflow hole 500 may 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 may be a pipe connecting the exterior of the housing assembly 110) to facilitate the discharge of condensed water. There may be multiple overflow holes 500, see Figure 1-Figure 3In the illustrated embodiment, the first water receiving tray 140 and the second water receiving tray 150 are each provided with two overflow holes 500 .

[0101] In order to make the installation of sensor 130 more stable, see Figure 4-Figure 5 In some embodiments, the first water receiving tray 140 includes a side plate 141 proximate to the first opening 1111, and the sensor 130 is located on the side of the side plate 141 facing the external connector 122. This allows the sensor 130 to be closer to the first water receiving tray 140 and the external connector 122. Furthermore, one end of the sensor 130 can abut against the side wall of the side plate 141 facing away from the first opening 1111. This arrangement allows the sensor 130 to be further positioned or supported by the abutment against the side plate 141, in addition to being connected to the first plate 112 and / or the second plate 113.

[0102] Based on the positioning or supporting function provided by the above-mentioned side walls, further, see Figure 4-Figure 5In some embodiments, the sensor 130 includes a sensor body 131 and a fixing bracket 132. The fixing bracket 132 is connected to the first plate 112 and / or the second plate 113, and the sensor body 131 is connected to the fixing bracket 132. Thus, the fixing bracket 132 can serve to position and install the sensor body 131. The connection between the fixing bracket 132 and the first plate 112 and / or the second plate 113, as well as the connection with the sensor body 131, can be determined according to needs, for example, a bolt connection can be used. Therefore, in some embodiments, a step portion 1321 is provided at one end of the fixing bracket 132 facing the side plate 141. The step portion 1321 includes a first step surface 13211 that abuts the first plate body 112 and / or the second plate body 113, and a second step surface 13212 that abuts the side wall of the side plate 141 facing away from the first opening 1111 (the abutment described in the present invention may be complete or partial). The second step surface 13212 is located on the side of the first step 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 disposed closer to the first plate body 112 and / or the second plate body 113. If the fixing bracket 132 needs to be connected to the first plate body 112 and / or the second plate body 113, the fixing bracket 132 can also be connected to the side plate 141 to ensure a more stable installation of the fixing bracket 132. To ensure that the fixing bracket 132 is simultaneously mated with the first plate 112 and / or the second plate 113, as well as the side plate 141, the first step surface 13211 of the step portion 1321 abuts the first plate 112 and / or the second plate 113. Furthermore, because the second step surface 13212 is connected to the first step surface 13211 and extends away from the first opening 1111 (i.e., toward the heat exchanger 120), the second step surface 13212 bends and extends to face the side wall of the side plate 141 away from the first opening 1111, thereby abutting the side plate 141. This arrangement enhances the installation stability of the fixing bracket 132 and prevents it from becoming loose. In addition, the step portion 1321 can also have a pressing or limiting function. Specifically, the first plate body 112 and / or the second plate body 113 and / or the side plate 141 can be provided with a matching structure that can be mutually engaged with the step portion 1321, or be provided with a limiting structure that can abut the step portion 1321 and limit the displacement of the step portion 1321 (the step portion 1321 can be disengaged from the limit under the action of an external force), so that the fixing bracket 132 is easier to install and position, and the installation is more stable.

[0103] Further, based on the sensor body 131 and the fixing bracket 132 defined in the above embodiment, see Figure 4-Figure 5, there can be various settings for the setting position of the sensor body 131. On the one hand, in some embodiments, the sensor body 131 is connected to the side of the fixed bracket 132 facing the heat exchanger 120. The above-mentioned setting can make the sensor 130 body have a better detection effect on the heat exchanger 120. On the second hand, in some embodiments, the sensor body 131 includes a detection port 1311 suitable for conducting a heat exchange medium, and the detection port 1311 is set away from the fixed bracket 132. With the above-mentioned setting, the detection port 1311 can be set to extend outward relative to the fixed bracket 132 to achieve a better detection effect. On the third hand, in some embodiments, the fixed bracket 132 includes a water retaining portion 1322, and the water retaining portion 1322 is provided on one side of the sensor body 131 along the axial direction L perpendicular to the first opening 1111. Specifically, the water retaining portion 1322 serves to shield the sensor body 131 from liquid. Therefore, the water retaining portion 1322 can be positioned between the sensor body 131 and a location on the heat exchanger 120 (or indoor unit 100) prone to leaks or drips. To prevent liquid from accumulating in the water retaining portion 1322, the water retaining portion 1322 can be plate-shaped and tilted relative to the horizontal, allowing liquid to slide off the retaining portion 1322. 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. Because the first and second plates 112 and 113 are detachable, the fixing bracket 132 and sensor body 131 can be removed to facilitate installation or maintenance. Furthermore, the sensor body 131 includes a terminal 1312, which can be located on the side of the sensor body 131 facing away from the second plate 113. By placing the connection terminal 1312 away from the first plate 112 , the connection arrangement of the sensor body 131 and the maintenance operation of the sensor body 131 (disassembly and assembly of the second plate 113 ) can be respectively located on both sides of the sensor body 131 , thereby preventing interference between the two.

[0104] See also Figure 2 and Figure 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. 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, and the first connecting side 1123 is located on the side of the second connecting side 1133 facing the heat exchanger 120, or the second connecting side 1133 is 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 via the stacked portion of the first connecting side 1123 and the second connecting side 1133, making the connection between the two more reliable.

[0105] Further, based on the configuration of the above embodiment, see Figure 2 and Figure 6 In some embodiments, the sensor 130 is connected to the first connecting side 1123. The indoor unit 100 further includes a first connecting member 160, which passes through the first connecting side 1123 and connects to the sensor 130. The second connecting side 1133 defines a clearance groove 11331 for circumventing the first connecting member 160. It is understood that the first connecting member 160, by passing through the first connecting side 1123, can connect the first plate 112 and the sensor 130. The clearance groove 11331 separates the first connecting member 160 from the second plate 113, so that the installation and removal of the second plate 113 does not affect the connection between the first plate 112 and the sensor 130. Furthermore, in some embodiments, the indoor unit 100 further includes a third connecting member 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 connecting member 170 can be passed through the first connecting side 1123 and the second connecting side 1133 to connect the first plate 112 and the sensor 130. In combination with the above-mentioned arrangement of the first connecting member 160 and the third connecting member 170, in order to inspect the sensor 130 (or other components inside the indoor unit 100), on the one hand, the operator can remove the second plate 113 by removing the third connecting member 170. At this time, the first connecting member 160 passes through the first connecting side 1123 and connects to the sensor 130, so that the sensor 130 is still connected to the first plate 112. Therefore, the operation of removing the second plate 113 does not affect the installation and positioning of the sensor 130. On the other hand, When the sensor 130 needs to be removed, it is necessary to support the sensor 130 in some installation methods to stably remove the sensor 130. Therefore, the above arrangement allows the operator to first remove the second plate 113 by removing the third connecting member 170, thereby revealing a portion of the first opening 1111. At this time, the sensor 130 is still connected to the first plate 112. The operator can then insert a hand or a tool into the first opening 1111 to stabilize the sensor 130, so that the sensor 130 can be removed by removing the first connecting member 160. In addition, the third connecting member 170 can also connect the first plate 112 and the second plate 113, thereby simplifying the connection structure. The third connecting member 170 can not only stabilize the connection of the sensor 130, but also connect the first plate 112 and the second plate 113, without the need for an additional connecting member to connect the first plate 112 and the second plate 113.

[0106] In addition, see Figure 12In 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 connecting member 600, the second connecting member 600 passes through the second connecting side 1133 and is connected to the sensor 130, and the first connecting side 1123 is provided with an avoidance groove 11331 for avoiding the second connecting member 600.

[0107] For the structural arrangement of the first plate 112 and the second plate 113, see Figure 2 and Figure 6 , defining the first direction X to be perpendicular to the axial direction L of the first opening 1111, and the second direction Y to be perpendicular to the first direction X and the axial direction L. Based on this, in some embodiments, the first plate 112 is located at the intersection of one side of the first opening 1111 along the first direction X and one side of the first opening 1111 along the second direction Y. The side of the first plate 112 in the opposite direction of the first direction X is the second side 1121, and the side in the opposite direction of the second direction Y is 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 connected to the third side 1122 and a fourth side 1132 connected to the second side 1121. It is understandable that the first plate 112 can be set at the edge of the first opening 1111, see Figure 2 and Figure 6 In the illustrated embodiment, the edges of the first opening 1111 are rectangular, and the first plate 112 is located at the top corner of the rectangle and is also rectangular. Thus, the second plate 113 can have a fourth side 1132 opposite the first plate 112 along the first direction X and a first side 1131 opposite the first plate 112 along the second direction Y. The fourth side 1132 is connected to the second side 1121, and the first side 1131 is connected to the third side 1122. Combined with the rectangular first opening 1111 and first plate 112 of the above embodiment, the second plate 113 can be L-shaped, with the two folded edges of the L corresponding to the first side 1131 and the fourth side 1132. The above-described arrangement of the first and second plates 112, 113, allows for a more compatible shape between the first and second plates 112, more stable installation, and easier positioning. In addition, in combination with the first connecting side 1123 and the second connecting side 1133 in the aforementioned embodiment, when the first side 1131 is connected to the third side 1122 , the first side 1131 becomes the second connecting side 1133 , and the third side 1122 becomes the first connecting side 1123 .

[0108] The second embodiment of the present invention further provides an air handling unit, comprising the indoor unit 100 of any of the above embodiments, an outdoor unit, and a duct assembly, wherein the duct assembly connects the indoor unit 100 and the outdoor unit.

[0109] For various configurations of the air handling unit, reference can be made to the relevant descriptions and related technologies of the aforementioned embodiments, and will not be repeated here. Thanks to the improvements to the indoor unit 100 in the aforementioned embodiments, the air handling unit of the second embodiment of the present invention has the same technical effects as the indoor unit 100 in the aforementioned embodiments. Detailed description will not be repeated here.

[0110] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, within the application concept of the present invention, are included in the patent protection scope of the present invention.

Claims

1. Indoor unit, characterized in that: include: A housing assembly defines a first chamber, the housing assembly comprising a first plate, the first plate having a first through hole and a second through hole communicating with the first chamber; a heat exchanger disposed in the first chamber, the heat exchanger comprising a first external connector, the first external connector being disposed through the first through hole; a first conversion tube, one end of which is adapted to be connected to the first external connector and the other end of which is adapted to be connected to the first internal connector of the outdoor unit; A sensor for detecting the concentration of the heat exchange medium around itself, wherein the sensor is arranged in the housing assembly; A flow guide assembly is adapted to connect to the side wall of the first plate body facing away from the first chamber and to be sleeved outside the first external joint, the first conversion tube, and the first internal joint. The flow guide assembly is adapted to form a first flow guide cavity connected to the second through hole together with the first plate body, the first external joint, the first conversion tube, and the first internal joint.

2. The indoor unit according to claim 1, wherein: The flow guide assembly includes a fixing block and a first sleeve; The fixing block is adapted to be connected to a wall surface of the first plate facing away from the first chamber, the fixing block is provided with a third through hole connected to the first through hole and the second through hole respectively, the first external connector is passed through the third through hole and is in clearance fit with the third through hole; One end of the first sleeve is suitable for connecting to the fixing block, and the first sleeve is suitable for being sleeved outside the first external joint, the first conversion tube and the first internal joint and connected to the outer peripheral wall of the first internal joint.

3. The indoor unit according to claim 2, wherein: The fixing block includes a base and a boss protruding from the base, the third through hole passes through the base and the boss, and the first sleeve is suitable for being sleeved on the outer periphery of the boss.

4. The indoor unit according to claim 3, wherein: The guide assembly also includes a first binding member and a second binding member. The first binding member is suitable for being mounted on one end outside the first sleeve and connecting the first sleeve and the boss. The second binding member is suitable for being mounted on the other end outside the first sleeve and connecting the first sleeve and the first internal joint.

5. The indoor unit according to claim 2, wherein: Along a direction perpendicular to the hole axis of the first through hole, one side of the first through hole is connected to the second through hole.

6. The indoor unit according to claim 5, wherein: The first plate body includes a plate body and an assembly block. The plate body is provided with an assembly opening. The assembly opening includes a first area and a second area. The assembly block is detachably connected to the plate body and covers the first area. The second area includes the first through hole and the second through hole.

7. The indoor unit according to claim 6, wherein: The second region further includes a fourth through hole and a fifth through hole, the fourth through hole is connected to the second through hole, and the fourth through hole is spaced apart from the first through hole; The heat exchanger further includes a second external connector, the second external connector being provided through the fourth through hole to exit the first chamber; The indoor unit further comprises a second conversion tube, one end of the second conversion tube being adapted to be connected to the second external connector and the other end being adapted to be connected to the second internal connector of the outdoor unit; The fixing block is provided with a sixth through hole which is in communication with the fourth through hole and the fifth through hole respectively, and the second external connector is passed through the sixth through hole and is in clearance fit with the sixth through hole; The flow guide assembly also includes a second sleeve, one end of which is suitable for connecting to the fixed block, and the second sleeve is suitable for being sleeved outside the second external joint, the second conversion tube and the second internal joint and connected to the outer peripheral wall of the second internal joint, so as to jointly define a second flow guide cavity connected to the fifth through hole with the second external joint, the second conversion tube and the second internal joint.

8. The indoor unit according to claim 3, wherein: The elastic modulus of the material of the first sleeve is smaller than the elastic modulus of the material of the first conversion tube; and / or, The elastic modulus of the material of the base is smaller than the elastic modulus of the material of the first external connector.

9. The indoor unit according to claim 1, wherein: The first conversion tube is suitable for being threadedly connected to the first external connector; and / or, The first conversion tube is suitable for being welded to the first internal joint.

10. The indoor unit according to claim 1, wherein The sensor is connected to the first plate; and / or, The sensor is located below the second through hole.

11. Air handling unit, characterized in that include: The indoor unit according to any one of claims 1 to 10; an outdoor unit, comprising said first internal connector; One end of the first conversion tube is connected to the first external joint, and the other end is connected to the first internal joint; the flow guide component is connected to the side wall of the first plate body facing away from the first chamber and is sleeved outside the first external joint, the first conversion tube and the first internal joint. The flow guide component, the first plate body, the first external joint, the first conversion tube and the first internal joint together form a first flow guide cavity connected to the second through hole.

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