Indoor unit and air conditioner

Abstract

The invention relates to the technical field of air conditioning, and discloses an indoor unit and an air conditioner. The indoor unit comprises a shell, the shell comprises an air duct piece and two side plates, the two side plates are arranged at the two opposite ends of the air duct piece, the outer wall face of the bottom wall of the air duct piece and the side plates form a pipe passing space, pipe outlets are formed in the side plates, and the two ends of the pipe passing space communicate with the two pipe outlets correspondingly; the pipeline assembly is located in the pipe laying space, and the pipeline assembly can extend out of the pipe laying space through any one of the two pipe outlets; the pipeline assembly is adjacent to the bottom wall of the air duct piece. In addition, the pipeline assembly is adjacent to the bottom wall of the air duct piece, so that no other part is arranged between the pipeline assembly and the bottom wall of the air duct piece, other parts do not need to be moved or dismantled during pipe connecting operation, and the pipe connecting convenience is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, for example, to an indoor unit and an air conditioner. Background Art

[0002] At present, air conditioners include indoor units and outdoor units, which need to be connected through refrigerant pipes. Due to the symmetrical apartment types, the refrigerant pipes will have different connection directions when the indoor units are installed. The current solution to this problem is to develop two mirror products for different apartment types, and users can choose according to their needs, or to install the refrigerant pipes connected to the outdoor unit from the outside of the indoor unit.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] In the related art, mirror-image products result in poor product versatility, or the refrigerant pipes are laid outside the indoor unit, which makes the pipe routing complicated and the operation cumbersome.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The disclosed embodiments provide an indoor unit and an air conditioner to reduce the complexity of piping, achieve simple and convenient piping operation, and improve the product versatility of the indoor unit.

[0008] The disclosed embodiment provides an indoor unit, which includes: a shell, the shell includes a duct member and two side panels, the two side panels are arranged at opposite ends of the duct member, the outer wall surface of the bottom wall of the duct member and the side panels construct a duct space, the side panels are provided with pipe outlets, and the two ends of the duct space are respectively connected to the two pipe outlets; a pipeline assembly is located in the duct space, and the pipeline assembly can extend to the outside of the duct space through any one of the two pipe outlets; wherein the pipeline assembly is arranged adjacent to the bottom wall of the duct member.

[0009] The disclosed embodiment further provides an air conditioner, comprising an indoor unit as described in any one of the above embodiments.

[0010] The indoor unit and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0011] In the indoor unit of the disclosed embodiment, the pipe assembly can be installed in the pipe running space, and pipe outlets are provided on both sides of the pipe running space, so that the pipe running space can not only accommodate part of the pipe assembly, but also enable the pipe assembly to select any one of the pipe outlets for pipe discharge, so that the pipe assembly can discharge pipes from both sides of the indoor unit and connect the pipes. In this way, there is no need to produce two mirror-image models, which improves the product versatility of the indoor unit. Moreover, there is no need to lay pipes outside the indoor unit, which can reduce the complexity of the pipe running and improve the convenience of operation. The pipe assembly of the disclosed embodiment is arranged adjacent to the bottom wall of the air duct component, so that there are no other components between the pipe assembly and the bottom wall of the air duct component, so that when performing the connecting operation, there is no need to move or remove other components, further improving the convenience of connecting the pipes.

[0012] In addition, the above general description and the following description are merely exemplary and explanatory and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0014] Figure 1 is a structural schematic diagram of an indoor unit provided by an embodiment of the present disclosure from a perspective;

[0015] Figure 2 is a structural schematic diagram of an indoor unit provided by an embodiment of the present disclosure from another perspective;

[0016] Figure 3 is a partial structural diagram of an indoor unit provided by an embodiment of the present disclosure;

[0017] Figure 4 is a partial structural diagram of another indoor unit provided by an embodiment of the present disclosure;

[0018] Figure 5 is a structural schematic diagram of an indoor unit provided by an embodiment of the present disclosure from another perspective;

[0019] Figure 6 is a schematic structural diagram of an air duct member provided in an embodiment of the present disclosure;

[0020] Figure 7 is a structural schematic diagram of another indoor unit provided by an embodiment of the present disclosure from a perspective;

[0021] Figure 8 is a structural schematic diagram of another indoor unit provided by an embodiment of the present disclosure from another perspective;

[0022] Fig. 9 is a partial structural diagram of another indoor unit provided by an embodiment of the present disclosure;

[0023] Fig.10 is a schematic cross-sectional structure diagram of an indoor unit provided by an embodiment of the present disclosure;

[0024] Fig.11 is a schematic cross-sectional structure diagram of another indoor unit provided by an embodiment of the present disclosure;

[0025] Fig.12 is a schematic cross-sectional structure diagram of another indoor unit provided by an embodiment of the present disclosure;

[0026] Fig.13 is a structural schematic diagram of another indoor unit provided by an embodiment of the present disclosure;

[0027] Fig.14 is a schematic cross-sectional structure diagram of another indoor unit provided by an embodiment of the present disclosure;

[0028] Fig.15 is a structural schematic diagram of another indoor unit provided by an embodiment of the present disclosure;

[0029] Fig.16 is a schematic structural diagram of another air duct member provided in an embodiment of the present disclosure;

[0030] Fig.17 is a schematic cross-sectional structure diagram of another indoor unit provided by an embodiment of the present disclosure;

[0031] Fig.18 is a partial structural diagram of another indoor unit provided by an embodiment of the present disclosure;

[0032] Fig.19 is a schematic cross-sectional structure diagram of another air duct component provided by an embodiment of the present disclosure;

[0033] Fig. 20 is a schematic structural diagram of another air duct member provided in an embodiment of the present disclosure;

[0034] Fig.21 is a schematic structural diagram of a snail tongue provided by an embodiment of the present disclosure;

[0035] Figure 22-1 is a schematic diagram of a simulation structure of an indoor unit provided by an embodiment of the present disclosure;

[0036] Figure 22-2 is a schematic diagram of a simulation structure of another indoor unit provided by an embodiment of the present disclosure;

[0037] Figure 23-1 is a schematic diagram of a simulation structure of another indoor unit provided by an embodiment of the present disclosure;

[0038] Figure 23-2 It is a schematic diagram of a simulation structure of another indoor unit provided in an embodiment of the present disclosure.

[0039] Reference numerals:

[0040] 10. housing; 11. air inlet; 12. air outlet; 13. accommodating chamber; 14. side panel; 141. outlet; 20. air duct member; 21. air duct; 211. fan chamber; 212. pressure diffuser chamber; 2121. upper wall of the pressure diffuser chamber; 2122. lower wall of the pressure diffuser chamber; 213. heat exchange chamber; 22. air suction duct; 23. step structure; 231. first step; 232. second step; 2 33, third step; 24, exhaust channel; 241, exhaust grille; 25, pipe space; 251, groove; 26, top wall of air duct member; 263, lower air duct plate; 27, volute tongue; 271, pressure relief hole; 272, pressure relief channel; 273, first section; 274, second section; 275, hook; 276, silencer chamber; 28, reinforcing rib; 29, air duct side plate; 291, curved air duct plate; 29 2. First return air channel; 293. Second return air channel; 30. Crossflow fan; 31. Impeller; 32. Motor; 33. Base; 34. Motor gland; 35. Buckle; 351. First clamping plate; 352. Second clamping plate; 36. Clamping hole; 40. Heat exchanger; 41. First heat exchange section; 42. Second heat exchange section; 43. Windward surface; 50. Pipeline assembly; 51. First pipeline; 52. Second pipeline ; 53. Conversion joint; 54. Refrigerant pipe; 60. Water pump; 61. Water pump water tray; 62. Water pump body; 63. Float; 64. Cover plate; 641. Discharge pipe; 65. Two-way joint pipe; 66. Mounting plate; 67. Water tray; 68. Pipe outlet; 69. Drain outlet; 70. Electric control box; 71. Clamp plate; 72. Clamp hole; 80. Guide rib; 81. First guide rib; 82. Second guide rib. DETAILED DESCRIPTION

[0041] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0042] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0044] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0045] Unless otherwise stated, the term "plurality" means two or more.

[0046] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0048] For ease of description, the up, down, left, right, front, and back directions in the embodiments of the present disclosure are as follows: Figure 2 As shown, the length direction of the indoor unit refers to the left-right direction of the indoor unit, the width direction of the indoor unit refers to the front-back direction of the indoor unit, and the height direction of the indoor unit refers to the up-down direction. It should be noted that the height direction of the indoor unit also refers to the thickness direction of the indoor unit.

[0049] Combination Figures 1 to 21 As shown, the embodiment of the present disclosure provides an indoor unit, such as Fig.10 As shown, the indoor unit includes a shell, the shell is provided with an air inlet 11 and an air outlet 12, and an air duct 21 is formed in the shell, the air duct 21 connects the air inlet 11 and the air outlet 12, and the indoor unit also includes a cross-flow fan 30 and a heat exchanger 40, the cross-flow fan 30 includes an impeller 31, and the impeller 31 is rotatably located in the air duct 21, and the cross-flow fan 30 can drive the airflow of the air inlet 11 to flow into the air duct 21 and flow out from the air outlet 12 after heat exchange with the heat exchanger, and the airflow after heat exchange is cold air or hot air, thereby adjusting the indoor temperature. The heat exchanger 40 and the impeller 31 are arranged side by side and spaced in the air duct 21 along the flow direction of the airflow in the air duct 21.

[0050] In the disclosed embodiment, the crossflow fan 30 and the impeller 31 are arranged along the direction from the air inlet 11 to the air outlet 12, which reduces the distance between the crossflow fan 30 and the air inlet 11 and reduces the air inlet resistance. In addition, the heat exchanger 40 is located on the air outlet side of the crossflow fan 30, and the length of the air duct on the air outlet side of the crossflow fan 30 is increased, which increases the air outlet area on the air outlet side, and can appropriately reduce the height of the air duct 21 on the air outlet side of the crossflow fan, thereby reducing the thickness of the entire indoor unit. This facilitates the installation of the indoor unit, reduces the thickness of the ceiling, and improves the user experience.

[0051] Optionally, the axial length of the heat exchanger 40 extends along the length direction of the indoor unit; and / or the axial length of the impeller 31 extends along the length direction of the indoor unit.

[0052] Optionally, the axial direction of the heat exchanger 40 is parallel to the axial direction of the impeller 31, or the axial direction of the heat exchanger 40 is parallel to the axial direction of the impeller 31, and there is an angle between them, which is less than or equal to 5°. This can reduce the space occupied by the heat exchanger and the crossflow fan, and can ensure the air volume and air uniformity in the length direction of the indoor unit, thereby improving the temperature control effect of the indoor unit.

[0053] Optionally, the indoor unit is installed in the ceiling, and the ceiling is provided with a return air port and an exhaust air port, the return air port corresponds to and is connected with the air inlet, and the exhaust air port corresponds to and is connected with the air outlet. In this way, the indoor airflow flows into the air duct through the return air port and the air inlet, and is discharged into the room through the air outlet and the exhaust air port in turn after the heat exchanger in the air duct.

[0054] Optionally, the bottom wall of the housing is provided with an air inlet 11, and the crossflow fan 30 corresponds to the air inlet 11, wherein the opening area of ​​the air inlet 11 is greater than or equal to the size of the crossflow fan 30. In this way, the air inlet 11 is on the bottom wall of the housing, and when the indoor unit is installed on a suspended ceiling or a ceiling, the air inlet 11 is downward, and the crossflow fan 30 is located above the air inlet 11. The crossflow fan 30 can be directly inspected through the air inlet 11, and the crossflow fan 30 can also be disassembled through the air inlet 11, which improves the convenience of inspection of the crossflow fan 30 and the convenience of inspection of the indoor unit.

[0055] Optionally, the heat exchanger 40 is a fin heat exchanger, and the heat exchanger 40 includes a plurality of fins and heat exchange tubes arranged side by side. The heat exchange tubes are reciprocatingly bent and passed through the plurality of fins, and the heat exchange tubes are filled with refrigerant.

[0056] Alternatively, if Figure 1 and Figure 2 As shown, the air inlet 11 is arranged on the front side of the bottom wall of the shell, and the air outlet 12 is arranged on the rear side wall of the shell, and the air outlet 12 corresponds to the heat exchanger 40, so that the air flow after passing through the heat exchanger 40 can directly flow out from the air outlet 12.

[0057] Alternatively, if Fig.10 As shown, the heat exchanger 40 includes a first heat exchange section 41 , which is in a straight plate shape and tilted upward or downward along the flow direction of the airflow in the air duct 21 .

[0058] In the disclosed embodiment, the heat exchanger 40 includes a straight plate-shaped first heat exchange section 41, and the first heat exchange section 41 is tilted upward or downward along the flow direction of the airflow in the air duct 21, so that the heat exchanger 40 can meet the demand for heat exchange area by adjusting the tilt angle, and can also adjust the height so that it will not be too high, thereby reducing the thickness of the indoor unit. The indoor unit of the disclosed embodiment can ensure the heat exchange area and heat exchange effect and reduce the thickness of the indoor unit through the arrangement of the cross-flow fan 30 and the heat exchanger 40 and the tilted straight plate-shaped first heat exchange section 41, so that the thickness of the ceiling can also be reduced, thereby releasing more indoor space, reducing the sense of oppression in the room, and improving the user experience.

[0059] Alternatively, if Fig.17 As shown, the angle between the windward surface 43 of the first heat exchange section 41 and the lower wall surface of the air duct 21 is 60°≤γ≤120°.

[0060] In the disclosed embodiment, when the angle between the windward surface 43 of the first heat exchange section 41 and the lower wall of the air duct 21 is less than 60°, the windward surface 43 of the first heat exchange section 41 is too close to the lower wall of the air duct 21, which increases the air flow resistance flowing through the first heat exchange section 41, resulting in a large loss of air volume, affecting the air outlet of the indoor unit. When the angle between the windward surface 43 of the first heat exchange section 41 and the lower wall of the air duct 21 is greater than 120°, the length of the first heat exchange section 41 will increase, thereby increasing the width or length of the indoor unit, which will increase the width or length of the indoor unit and is not conducive to the popularization of the indoor unit. Therefore, the inclination angle of the first heat exchange section 41 is within the above range, which can ensure that the air flow resistance at the heat exchanger 40 is not too large and will not affect the width or length of the indoor unit.

[0061] Optionally, 60°≤γ≤90°, or 60°≤γ≤80°.

[0062] For example, γ is 60°, 65°, 70°, 75°, 80°, 85°, 90°, 100°, 110° or 120°, etc.

[0063] Optionally, the air duct 21 includes a fan chamber 211 and an air outlet chamber connected in sequence along the flow direction of the airflow, the crossflow fan 30 is located in the fan chamber 211, the heat exchanger 40 is located in the air outlet chamber, and along the flow direction of the airflow in the air duct 21, the flow area of ​​the air outlet chamber gradually increases.

[0064] In the disclosed embodiment, the air outlet cavity is located on the air outlet side of the cross-flow fan 30, and the flow area of ​​the air outlet cavity gradually increases with the flow direction of the air flow. This can reduce the air flow velocity in the center of the air outlet cavity, reduce the flow velocity difference between the center of the air duct 21 and the periphery of the air duct 21, reduce noise, and reduce the flow velocity, which can improve the heat exchange efficiency between the air flow and the heat exchanger 40.

[0065] Optionally, the height of the air outlet cavity gradually increases along the flow direction of the airflow in the air duct 21, that is, the distance between the top wall of the air outlet cavity and the bottom wall of the air outlet cavity gradually increases along the flow direction of the airflow in the air duct 21. In this way, the airflow in the air outlet cavity can be decelerated, the difference between the airflow velocity at the periphery of the air outlet cavity and the airflow velocity at the center of the air outlet cavity is reduced, the noise is reduced, and the airflow velocity is slowed down, so that the airflow can more fully exchange heat with the heat exchanger 40 to ensure the heat exchange area.

[0066] Optionally, the heat exchanger is arranged at the outlet end of the air outlet cavity to ensure the air outlet distance of the air outlet cavity.

[0067] Optionally, the air duct 21 includes a fan chamber 211, a pressure diffuser chamber 212 and a heat exchange chamber 213, the air outlet chamber includes the pressure diffuser chamber 212 and the heat exchange chamber 213, the crossflow fan 30 is located in the fan chamber 211, the heat exchanger 40 is located in the heat exchange chamber 213, and along the flow direction of the airflow in the pressure diffuser chamber 212, the distance between the upper wall surface 2121 of the pressure diffuser chamber and the lower wall surface 2122 of the pressure diffuser chamber gradually increases, that is, the height of the pressure diffuser chamber 212 gradually increases along the flow direction of the airflow in the air duct 21. In this way, the airflow in the air duct 21 can be decelerated in the pressure diffuser chamber 212, the difference between the airflow velocity at the periphery of the air duct 21 and the airflow velocity at the center is reduced, the noise is reduced, and the airflow velocity is slowed down, and the airflow can more fully exchange heat with the heat exchanger 40 to ensure the heat exchange area.

[0068] Optionally, the height of the heat exchange cavity 213 is greater than the height of the pressure diffusion cavity 212. In this way, the air duct 21 can be matched and connected with the heat exchanger 40, so that the airflow in the air duct 21 can completely flow through the heat exchanger 40. Moreover, the closer to the heat exchanger 40, the airflow flow area in the heat exchange cavity is further increased, which can avoid the formation of more vortices due to large airflow resistance, reduce the number of vortices, reduce the amount of airflow reflux, reduce noise, and reduce the airflow velocity so that the airflow in the heat exchange cavity can fully exchange heat with the heat exchanger.

[0069] Optionally, the upper wall surface 2121 of the pressure diffuser cavity is inclined downward along the flow direction of the airflow in the air duct 21, and the angle between the upper wall surface 2121 of the pressure diffuser cavity and the horizontal direction is 5°≤α≤15°.

[0070] In the disclosed embodiment, the upper wall surface 2121 of the pressure diffuser cavity is tilted downward along the flow direction of the airflow in the air duct 21, so that the airflow out of the crossflow fan 30 can be guided to flow into the heat exchanger 40 better. Moreover, since the airflow is tilted downward, it also has a tendency to move downward under its own gravity, thereby reducing the energy consumption of the crossflow fan and the resistance of the airflow in the air duct. When the angle between the upper wall surface 2121 of the pressure diffuser cavity and the horizontal direction is less than 5°, the inclination angle of the upper wall surface 2121 of the pressure diffuser cavity is too small, and the guiding effect on the airflow is small. When the angle between the upper wall surface 2121 of the pressure diffuser cavity and the horizontal direction is greater than 15°, the inclination angle of the upper wall surface 2121 of the pressure diffuser cavity is too large, which will cause the upper wall surface of the air duct 21 to be steeper and part of the airflow to flow faster, affecting the flow of airflow in the air duct 21 and causing airflow loss. Furthermore, if the angle between the upper wall surface 2121 of the pressure diffuser and the horizontal direction is greater than 15°, in order to ensure the flow area of ​​the air duct 21, the height of the air duct 21 will also increase, which will increase the thickness of the indoor unit. Therefore, the upper wall surface 2121 of the pressure diffuser can ensure the guiding effect on the airflow within the above-mentioned inclination angle, reduce the loss of the airflow, and reduce the thickness of the indoor unit.

[0071] Optionally, the angle between the upper wall surface 2121 of the diffuser cavity and the horizontal direction is 7°≤α≤13°, or 8°≤α≤12°, or 6°≤α≤11°.

[0072] For example, the angle α between the upper wall 2121 of the diffuser cavity and the horizontal direction is 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc.

[0073] Optionally, the lower wall surface 2122 of the pressure diffuser cavity is inclined downward along the flow direction of the airflow in the air duct 21, and the angle between the lower wall surface 2122 of the pressure diffuser cavity and the horizontal direction is 25°≤β≤35°.

[0074] In the disclosed embodiment, the lower wall surface 2122 of the pressure diffuser chamber is tilted downward along the flow direction of the airflow in the air duct 21, so that the lower wall surface 2122 of the pressure diffuser chamber can guide the airflow to the heat exchanger 40. When the angle between the lower wall surface 2122 of the pressure diffuser chamber and the horizontal direction is less than 25°, the height change of the pressure diffuser chamber 212 is small, resulting in an unobvious effect of the pressure diffuser chamber 212. When the angle between the lower wall surface 2122 of the pressure diffuser chamber and the horizontal direction is greater than 35°, the inclination angle of the lower wall surface 2122 of the pressure diffuser chamber is too large, which will cause the airflow velocity to be turbulent, generate noise or affect the air volume, and increase the height of the air duct 21, thereby increasing the thickness of the indoor unit. Therefore, when the lower wall surface 2122 of the pressure diffuser chamber is within the above range, it can not only ensure the pressure diffusion effect, but also ensure the smoothness of the airflow and the size of the indoor unit.

[0075] Optionally, the angle between the lower wall surface 2122 of the diffuser cavity and the horizontal direction is 27°≤β≤33°, or 28°≤β≤32°, or 29°≤β≤31°.

[0076] For example, the angle β between the upper wall 2121 of the diffuser cavity and the horizontal direction is 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, etc.

[0077] Optionally, the center of the starting end of the pressure diffuser chamber 212 is located above the center line of the indoor unit in the height direction.

[0078] In the disclosed embodiment, the pressure diffuser 212 is close to the top of the indoor unit, so that there is enough extension space below the pressure diffuser 212. This can not only ensure the length and air output of the pressure diffuser 212, but also ensure that the components in the shell are more compact, thereby avoiding an increase in the thickness of the indoor unit.

[0079] Optionally, the center of the starting end of the pressure diffusion chamber 212 is located above a dividing line at three quarters of the height in the height direction of the indoor unit.

[0080] In the disclosed embodiment, the pressure diffuser 212 is arranged as high as possible, so as to ensure that there is no extra space above the indoor unit, minimize the size of the indoor unit, and ensure the length of the air duct 21 extending downward, thereby ensuring the air outlet effect and reducing the thickness of the indoor unit.

[0081] Optionally, the minimum distance from the starting end of the pressure diffusion chamber 212 to the windward surface 43 of the first heat exchange section 41 is greater than the length of the air suction duct 22 on the air suction side of the crossflow fan 30. In this way, the length of the air duct 21 on the air outlet side of the crossflow fan 30 can be increased to ensure the air volume, and because the air inlet 11 is located on the bottom wall of the shell, the length of the air suction duct 22 is short, which does not increase the thickness of the indoor unit, thereby ensuring the "ultra-thin" size of the indoor unit.

[0082] Optionally, the indoor unit further includes a volute tongue 27, which is located in the air duct. The volute tongue 27 is arranged on the lower wall surface of the air duct 21 and corresponds to the cross-flow fan 30; wherein the highest point of the volute tongue 27 is located above the center line of the indoor unit in the height direction.

[0083] In the disclosed embodiment, the volute tongue 27 corresponds to the crossflow fan 30, and the volute tongue 27 is used to adjust the aerodynamic performance of the crossflow fan 30, so that the crossflow fan 30 can discharge air. The highest point of the volute tongue 27 is located at the upper half of the indoor unit, so that the bottom wall of the starting end of the pressure diffuser chamber 212 is also located above the center line of the indoor unit, so that the pressure diffuser chamber 212 can have a sufficient downward extension direction and a sufficient inclination angle, thereby ensuring the smoothness of the air discharge and the air volume in the air duct 21.

[0084] In some optional embodiments, the heat exchanger 40 is in a straight plate shape as a whole.

[0085] In the disclosed embodiment, the heat exchanger 40 is a straight plate as a whole, so that the production of the heat exchanger 40 is simple, the cost is low, and it is easy to process.

[0086] In some other optional embodiments, Fig.11 and Fig.12 As shown, the heat exchanger 40 further includes a second heat exchange section 42 , which is connected to the first heat exchange section 41 , and an angle is formed at the connection between the second heat exchange section 42 and the first heat exchange section 41 .

[0087] In the disclosed embodiment, the heat exchanger 40 may also be in other shapes, which can increase the area of ​​the heat exchanger 40 and improve the heat exchange capacity.

[0088] Optionally, the opening direction of the included angle between the first heat exchange section 41 and the second heat exchange section 42 is toward the cross-flow fan 30, which can further increase the heat exchange area and improve the heat exchange amount.

[0089] Optionally, the second heat exchange section 42 and the first heat exchange section 41 are arranged in the vertical direction, so that the area of ​​the heat exchanger 40 can be flexibly adjusted to ensure the heat exchange area and heat exchange amount. Fig.11 As shown, the heat exchanger is V-shaped. Fig.12 As shown, the heat exchanger is L-shaped.

[0090] Optionally, the first heat exchange section 41 and the second heat exchange section 42 are arranged in sequence along the flow direction of the airflow, which can also increase the heat exchange area and improve the heat exchange effect.

[0091] Alternatively, if Fig.17As shown, the ratio of the distance H1 between the center of the impeller 31 of the crossflow fan 30 and the bottom of the indoor unit to the height M of the entire indoor unit is H1 / M≤0.45. The center of the impeller 31 of the crossflow fan 30 is arranged lower, which can reduce the length of the air suction duct 22 and further reduce the thickness of the indoor unit.

[0092] Optionally, H1 / M≤0.4, or, H1 / M≤0.35, or, H1 / M≤0.3.

[0093] For example, H1 / M is 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, etc.

[0094] Optionally, H1-R≥10 mm, where H1 is the distance between the center of the impeller 31 of the crossflow fan 30 and the bottom wall of the housing, and R is the radius of the impeller 31 of the crossflow fan 30. This can prevent the length of the air suction duct 22 from being too short, thereby ensuring the air intake volume and air intake effect of the indoor unit.

[0095] Alternatively, if Figure 1 , Figures 7 to 9 As shown, the housing includes an air duct member 20 and two side panels 14, the two side panels 14 are arranged at opposite ends of the air duct member 20, the outer wall surface of the bottom wall of the air duct member and the side panels 14 form a pipe running space 25, the side panels 14 are provided with pipe outlets 141, and the two ends of the pipe running space 25 are respectively connected to the two pipe outlets 141. The indoor unit also includes a pipe assembly 50, the pipe assembly 50 is located in the pipe running space 25, and the pipe assembly 50 can extend to the outside of the pipe running space 25 through any one of the two pipe outlets 141; wherein the pipe assembly 50 is arranged adjacent to the bottom wall of the air duct member.

[0096] In the disclosed embodiment, the outer wall surface of the bottom wall of the air duct member and the side panel 14 form a pipe space 25, and the pipe assembly 50 can be stored in the pipe space 25. Both ends of the pipe space 25 have pipe openings 68, so that the pipe assembly 50 can extend from any one of the pipe openings 68 on both sides, which improves the convenience of connecting the pipes. There is no need to produce two mirror-image models, which improves versatility. There is no need to wind a connecting pipe around the outside of the indoor unit, and the pipe will not be bent, which makes the operation simple and the connecting pipes convenient. In addition, the pipe assembly 50 is arranged adjacent to the bottom wall of the air duct member, so that there are no other components between the pipe assembly 50 and the bottom wall of the air duct member, which facilitates the movement and arrangement of the pipe assembly 50, and the pipe assembly 50 will not interfere with other components, nor will it affect the disassembly and assembly of other components.

[0097] Optionally, the outer wall surface of the bottom wall of the air duct member is configured with a clamping member, and the clamping member is configured with a clamping groove, and the outer wall surface of the pipeline assembly 50 can be clamped in the clamping groove, so that the pipeline assembly 50 can be fixed.

[0098] Optionally, the outer wall of the pipe assembly 50 is close to the bottom wall of the air duct member 20, so that the pipe assembly 50 is as close as possible to the air duct member 20, so as to avoid the pipe assembly 50 increasing the thickness of the indoor unit, and also to avoid the pipe assembly 50 protruding too much from the indoor unit, being damaged or affecting the air flow.

[0099] Alternatively, if Fig.10 As shown, the housing includes a casing 10 and a duct member 20. The casing 10 defines a housing chamber 13 having an air inlet 11 and an air outlet 12. The crossflow fan 30 and the heat exchanger 40 are sequentially arranged in the housing chamber along the direction from the air inlet 11 to the air outlet 12. The duct member 20 is located in the housing chamber 13. The duct member 20 defines an outlet duct 21, which is connected between the crossflow fan 30 and the heat exchanger 40. Here, the casing 10 is sleeved on the outside of the duct member 20. The duct member 20 defines an outlet duct 21 inside. The inlet of the duct 21 is located in the housing chamber and connected to the air inlet 11. The outlet of the duct 21 is located in the housing chamber and connected to the air outlet 12. In this way, the casing can be used to place other components besides the duct member 20. In addition, the casing can protect the duct member 20 and prevent the duct member 20 from being damaged by the external environment, resulting in air leakage and the like.

[0100] Optionally, the casing includes two side panels, the pipe space extends along the length direction of the indoor unit, and the two side panels are connected to both sides of the length direction of the indoor unit, that is, the left and right ends of the indoor unit, thereby realizing left and right pipe connections of the indoor unit.

[0101] Optionally, the casing is completely sleeved on the outside of the outer wall of the air duct member 20 , so that the air duct member 20 can be completely protected.

[0102] Alternatively, if Fig.10 As shown, the top wall of the housing is located outside the top wall 26 of the duct member to protect the top wall 26 of the duct member, and / or the bottom wall of the housing is located outside the bottom wall of the duct member to protect the bottom wall of the duct member.

[0103] Optionally, the left and right side walls of the casing (ie, the two side panels 14 ) are respectively located outside the left and right side walls of the air duct member 20 to protect the left and right side walls of the air duct member 20 .

[0104] Optionally, the top wall of the housing is close to (fitted with or close to) the top wall 26 of the air duct member. In this way, the housing can increase the strength of the air duct member 20 and the top wall of the housing to prevent the air duct member 20 from being damaged.

[0105] Optionally, the two side panels of the casing include a left panel and a right panel, the right panel is connected between the right end portion of the top wall of the casing and the right end portion of the bottom wall of the casing, the left panel is connected between the left end portion of the top wall of the casing and the left end portion of the bottom wall of the casing, the rear side wall of the casing is connected between the rear end portion of the top wall of the casing, the rear end portion of the bottom wall of the casing, the rear end portion of the left panel and the rear end portion of the right panel, and the rear side wall of the casing is provided with an air outlet 12, and the bottom wall of the casing is provided with an air inlet 11.

[0106] Optionally, the casing further includes a front side wall of the casing, and the front side wall of the casing is connected between the front end of the top wall of the casing, the front end of the bottom wall of the casing, the front end of the left side plate and the front end of the right side plate.

[0107] Alternatively, if Fig.10 As shown, the indoor unit further includes a water receiving pan 67, which is located below the heat exchanger 40 and is used to receive condensed water from the heat exchanger 40. One end of the water receiving pan 67 is connected to one end of the bottom wall of the air duct member, and the other end of the bottom wall of the air duct member is provided with a volute 27, and the other end of the bottom wall of the air duct member corresponds to the impeller 31.

[0108] Optionally, the bottom wall of the casing is located below the water receiving tray 67 , one end of the bottom wall of the casing is connected to one end of the bottom wall of the air duct member, and the other end of the bottom wall of the casing forms an air outlet 12 .

[0109] Optionally, the bottom wall of the air duct member is detachably connected to the bottom wall of the casing, which facilitates the removal and installation of the air duct member 20 and the casing.

[0110] Optionally, the bottom wall of the air duct member is connected to the bottom wall of the housing by means of screws or buckles 35 .

[0111] Optionally, one end of the bottom wall of the air duct member is detachably connected to the water receiving tray 67 , which also facilitates the removal and installation of the water receiving tray 67 .

[0112] Optionally, one end of the bottom wall of the air duct member is snap-fitted to the water receiving tray 67 .

[0113] Optionally, a slot is provided at one end of the bottom wall of the air duct member, and the slot matches one end of the water receiving tray 67, so that one end of the water receiving tray 67 can be engaged with the slot.

[0114] Optionally, the housing is a sheet metal part. Optionally, the air duct part 20 is a plastic part, which can reduce the cost of the indoor unit.

[0115] Alternatively, if Figure 1 , Figure 2 and Figure 8As shown, when the housing includes two spaced and oppositely disposed side panels 14, the side panels 14 are provided with a pipe outlet 141. Optionally, the two side panels 14 are respectively located on the left and right sides of the indoor unit, so that the pipe assembly 50 can extend from the left or right side of the indoor unit, and the side panels are part of the housing and can protect the duct member from the outside of the duct member.

[0116] Alternatively, if Figure 1 As shown, the bottom wall of the duct member protrudes toward the inside of the duct 21 to form a groove 251, and the pipe assembly 50 is located in the groove 251. In the embodiment of the present disclosure, the bottom wall of the duct member forms a groove 251, and the setting of the groove 251 avoids more space for installing the pipe assembly 50, reducing the protruding height of the pipe assembly 50, so that the pipe assembly 50 does not increase the thickness of the indoor unit.

[0117] Optionally, the pipe space 25 is located between the diffuser chamber 212 and the fan chamber 211 .

[0118] In the disclosed embodiment, the height of the pressure diffuser chamber 212 is greater than the height of the fan chamber 211, so that a groove 251 is present at the connection between the pressure diffuser chamber 212 and the fan chamber 211. The groove 251 formed at the connection between the pressure diffuser chamber 212 and the fan chamber 211 can be used to place the pipeline assembly 50, which facilitates the arrangement of the pipeline assembly 50 and the formation of the pressure diffuser chamber 212.

[0119] Alternatively, if Fig. 9 and Fig.14 As shown, the pipeline assembly 50 includes a refrigerant pipe 54, and the refrigerant pipe 54 includes a first pipeline 51, a second pipeline 52 and a conversion joint 53. One end of the first pipeline 51 is connected to the heat exchanger 40; one end of the second pipeline 52 is connected to the other end of the first pipeline 51, and at least part of the second pipeline 52 is located in the pipe space 25; the conversion joint 53 is connected between the other end of the first pipeline 51 and one end of the second pipeline 52 to adjust the angle between the first pipeline 51 and the second pipeline 52 so that the second pipeline 52 can extend to the outside of the pipe space 25 through any one of the two outlets 141.

[0120] In the disclosed embodiment, the refrigerant pipe is used to realize the inlet and outlet of the heat exchanger 40. The second pipeline 52 is connected to the first pipeline 51 through a conversion joint 53. The conversion joint 53 can be rotated, so that the second pipeline 52 can be rotated through the conversion joint 53 to adjust the relative position of the second pipeline 52 and the first pipeline 51, so that the second pipeline 52 can extend from any one of the outlets 141 on both sides of the pipe space 25, so that the other end of the second pipeline 52 is connected to the outdoor unit.

[0121] Optionally, the side plate 14 and the end of the heat exchanger 40 enclose an installation space, wherein at least part of the first pipeline 51 is located in the installation space, and the first pipeline 51 extends along the width direction of the indoor unit, and the second pipeline 52 extends along the length direction of the indoor unit. In this way, the second pipeline 52 can extend from the outlet 141 on the left side of the indoor unit or from the outlet 141 on the right side of the indoor unit through the conversion joint 53.

[0122] For example, when the second pipeline 52 extends from the left outlet 141, the second pipeline is located on the left side of the first pipeline. When the first pipeline 51 extends from the right outlet 141, the second pipeline is located on the right side of the first pipeline.

[0123] Optionally, the conversion joint 53 is L-shaped.

[0124] Optionally, the other end of the second pipeline 52 is suitable for communicating with one end of a connecting pipe, and the other end of the connecting pipe is connected to a compressor of an outdoor unit and / or an outdoor heat exchanger to form a refrigerant circulation loop.

[0125] Optionally, the number of refrigerant pipes 54 is two to realize the inlet and outlet of the heat exchanger 40. Specifically, the number of first pipelines 51 is two, one first pipeline 51 is connected to the liquid inlet of the heat exchanger 40, and the other first pipeline 51 is connected to the liquid outlet of the heat exchanger 40, so that the heat exchanger 40 inlets and outlets liquid from the same side, which is convenient for the arrangement and connection of the pipelines. The number of second pipelines 52 is the same as the number of first pipelines 51 and corresponds one to one, so that one second pipeline 52 is connected to one first pipeline 51 to form an inlet pipe, and another second pipeline 52 is connected to another first pipeline 51 to form an outlet pipe, so that the inlet and outlet of the heat exchanger 40 and the connection with the outdoor unit can be realized.

[0126] Optionally, the two first pipelines 51 are arranged side by side and spaced apart along the length direction of the indoor unit.

[0127] Optionally, the two second pipelines 52 are arranged side by side in the pipe running space 25 along the width direction of the indoor unit, or the two second pipelines 52 are arranged in the pipe running space 25 along the height direction. In actual use, the arrangement direction of the two second pipelines 52 can be set according to the size of the pipe running space 25 and the size of the second pipeline 52.

[0128] Optionally, the pipeline assembly 50 further includes a heat-insulating pipe, which is sleeved on the outside of the first pipeline 51 and the second pipeline 52 .

[0129] Optionally, a notch is provided at the lower end of the pipe outlet 141. In this way, the lower end of the pipe outlet 141 is not closed, which facilitates the removal of the pipeline from the pipe outlet 141 or the insertion of the pipeline into the pipe outlet 141, further improving the convenience of disassembly and assembly of the pipeline assembly 50.

[0130] Optionally, the water receiving pan 67 is provided with a drain port 69, the water receiving pan 67 is in contact with the side plate 14, the side plate 14 is provided with a drain notch, and the drain port 69 is connected to the outside through the drain notch. In this way, the water receiving pan 67 can better receive water, and prevent the water in the water receiving pan 67 from leaking into the indoor unit. The side plate 14 is provided with a drain notch, and the drain port 69 of the water receiving pan 67 discharges the water to the outside through the drain notch, so that the water in the water receiving pan 67 can be discharged to the outside of the indoor unit.

[0131] In some optional embodiments, both left and right ends of the water receiving tray 67 are provided with drain ports 69, and the drain ports 69 are adapted to be connected to the first drain pipe. In the disclosed embodiment, the indoor unit can be selectively connected to the first drain pipe from the left side of the water receiving tray 67 or the right side of the water receiving tray 67 according to the installation position, and the other end of the first drain pipe is connected to the outside, so that the water in the water receiving tray 67 is discharged to the outside through the first drain pipe.

[0132] Optionally, the indoor unit also includes a water pump 60, which is connected to the water receiving tray 67. The water pump 60 is used to pump water out of the water receiving tray 67. The pipeline assembly 50 also includes a second drain pipe, which is connected to the water outlet of the water pump 60; wherein, at least part of the second drain pipe can be located in the pipe space 25, and the second drain pipe can extend to the outside of the pipe space 25 through any one of the two pipe outlets 141.

[0133] In the disclosed embodiment, the water in the water receiving pan 67 is pumped out by the water pump 60, which can improve the drainage efficiency so that the water in the water receiving pan 67 can be completely drained. The second drain pipe is connected to the water outlet of the water pump 60, so that the second drain pipe can drain the water pumped out by the water pump 60. The second drain pipe can also be located in the pipe space 25, so that the drain pipe can also extend from the left or right side through the pipe space 25 to achieve left and right connection of the drain pipe. In this way, the drain pipe does not need to be arranged outside the indoor unit, which reduces the complexity of the pipe setting and improves the convenience of connection.

[0134] Alternatively, if Figures 1 to 5 As shown, the water pump 60 is arranged outside the accommodating chamber 13, or, as shown in Figures 7 to 9 As shown, the water pump 60 is located in the accommodating chamber 13 and on one side of the heat exchanger 40 .

[0135] In the disclosed embodiment, the water pump 60 can be located outside the accommodating chamber 13, so that the water pump 60 can be disassembled and installed without opening the casing, and the water pump 60 can be disassembled and installed from the outside of the casing. The water pump 60 can also be located inside the accommodating chamber 13 and on one side of the length direction of the heat exchanger 40, so that the water pump 60 can be disassembled and installed from one side of the heat exchanger 40, and the water pump 60 will not be close to the crossflow fan 30, nor will it interfere with the motor 32 and other components of the crossflow fan 30, so that the water pump 60 can be disassembled and installed independently, which improves the maintenance convenience of the water pump 60, and also improves the disassembly and maintenance convenience of the crossflow fan 30.

[0136] Optionally, the water pump 60 is disposed on a side of the side plate 14 away from the accommodating chamber 13. In this way, the water pump 60 can be connected to the side plate 14, and the water pump 60 can be fixed outside the indoor unit.

[0137] Alternatively, if Figure 4 As shown, the water receiving pan 67 includes a bottom plate and a side, the side being connected to the side of the bottom plate facing the pipe space 25 and extending along the height direction of the indoor unit; wherein, a pipe outlet 68 is provided on the side, and the first pipeline 51 extends into the pipe space 25 through the pipe outlet 68. In the disclosed embodiment, the side of the water receiving pan 67 can block the water in the water receiving pan 67 from flowing out from the side of the bottom plate facing the pipe space 25. The side is provided with a pipe outlet 68, and the pipe outlet 68 facilitates the pipe outlet 68 of the first pipeline 51 to pass through and extend into the pipe space 25, so that the water capacity of the water receiving pan 67 can be ensured.

[0138] Alternatively, if Figure 3 and Figure 4 As shown, when the water pump 60 is located outside the accommodating chamber 13, the water pump 60 is connected to the drain port 69 through the drainage gap. The water pump 60 includes a water pump water receiving tray 61 and a water pump body 62. The water pump body 62 is located in the water pump water receiving tray 61. The water pump body 62 is used to discharge the water in the water pump water receiving tray 61; the indoor unit also includes a two-way joint pipe 65, which is connected between the drain port 69 and the water pump water receiving tray 61 so that the water in the water receiving tray 67 can be discharged into the water pump water receiving tray 61 through the two-way joint pipe 65.

[0139] In the disclosed embodiment, the water pump water receiving pan 61 is connected to the water receiving port of the water receiving pan 67 through a two-way joint pipe 65, so that under the drive of the water pump body 62, the water pump body 62 can pump the water in the water receiving pan 67 into the water pump water receiving pan 61, and then the water pump body 62 discharges the water in the water pump water receiving pan 61. The two-way joint pipe 65 is connected between the water receiving pan 67 and the water pump water receiving pan 61 to achieve the connection between the water pump 60 and the water pan.

[0140] Optionally, the two-way joint pipe 65 is a hose, which is convenient for adjusting the setting of the two-way joint pipe 65 and improving installation flexibility.

[0141] Optionally, the water pump 60 also includes a float 63, a cover plate and a discharge pipe 641, the float 63 is arranged in the water pump water receiving tray 61; the cover plate is arranged above the water pump water receiving tray 61, and the cover plate is provided with a through hole; the discharge pipe 641 is connected to the water outlet of the water pump 60, and extends through the through hole to the outside of the cover body, and the discharge pipe 641 is suitable for connecting with the second drain pipe.

[0142] In the disclosed embodiment, the float 63 is in the water pump water receiving pan 61, and the float 63 is used to detect the water level in the water pump water receiving pan 61. The cover plate can cover the water pump water receiving pan 61, and can prevent the water in the water pump water receiving pan 61 from overflowing. The cover plate is also provided with a through hole, and the discharge pipe 641 extends from the through hole and can be connected to the second drain pipe, so that the water pump body 62 can drive the water in the water pump water receiving pan 61 to be discharged from the discharge pipe 641 to the inside of the water pump 60, and then discharged from the discharge pipe 641 through the second drain pipe.

[0143] Alternatively, if Fig. 9 As shown, when the water pump 60 is located outside the accommodating chamber 13, the water pump 60 is located on one of the left and right sides of the indoor unit. When the indoor unit needs to drain water from one of the left and right sides of the indoor unit, the second drain pipe is directly connected to the discharge pipe of the water pump, and the second drain pipe is located outside the accommodating chamber 13. When the indoor unit needs to drain water from the other of the left and right sides of the indoor unit, the second drain pipe can be moved into the pipe space 25, and then extend from the pipe outlet 141 on the other of the left and right sides of the pipe space 25, so as to realize the left and right pipe connection of the drain pipe when the water pump 60 is externally placed.

[0144] Optionally, when the water pump 60 is located in the accommodating cavity 13 and on one side in the length direction of the heat exchanger 40, the side panel 14 and the end in the length direction of the heat exchanger 40 enclose an installation space, the water receiving pan 67 covers the heat exchanger 40 and the bottom of the installation space, the water pump 60 is located in the installation space, the water inlet of the water pump 60 is connected to the water receiving pan 67, and the water outlet of the water pump 60 is connected to the drain port 69.

[0145] In the disclosed embodiment, the water pump 60 may also be disposed in the accommodating cavity 13 and located between the heat exchanger 40 and the side plate 14, so that the water pump 60 may be directly located in the water receiving tray 67, and the water pump 60 may pump the water in the water receiving tray 67 to the drain port 69 to discharge it outside the indoor unit, and the second drain pipe is connected to the water outlet of the water pump 60.

[0146] Optionally, when the water pump 60 is located on one side of the length direction of the heat exchanger 40, when it is necessary to drain water from one side of the length direction of the heat exchanger 40, the second drain pipe is located outside the accommodating chamber 13, and the second drain pipe is connected to the water pump 60 to directly drain the water in the water receiving pan 67. When it is necessary to drain water from the other side of the length direction of the heat exchanger 40 (that is, the side away from the water pump 60), after the second drain pipe is connected to the water outlet of the water pump 60, the second drain pipe is moved into the pipe space 25, and the pipe is discharged from the pipe outlet 141 at the end of the pipe space 25 away from the water pump 60 to drain water.

[0147] Optionally, the air duct member 20 is provided with a fixing hole, and when the second drain pipe is located in the pipe space 25, the second drain pipe is fixed to the bottom wall of the air duct member through the fixing hole by a fixing device, so that the second drain pipe can be fixed.

[0148] Optionally, the fixing device is a binding fixing device such as a cable tie.

[0149] Optionally, at least part of the pipe routing space corresponds to the air inlet, that is, the pipe components in the pipe routing space can be operated through the air inlet, further improving the convenience of connecting the pipes.

[0150] Optionally, the water pump 60 is detachably connected to the casing. In this way, the water pump 60 can be installed and fixed on the casing, and can also be removed from the casing, thereby facilitating the inspection and disassembly of the water pump.

[0151] Optionally, the indoor unit further includes a mounting plate 66, which is connected between the water pump 60 and the side plate 14; wherein, when the water pump 60 is located outside the accommodating chamber 13, the mounting plate 66 is connected between the wall of the side plate 14 away from the accommodating chamber 13 and the water pump 60; or, when the water pump 60 is located in the accommodating chamber 13, one end of the mounting plate 66 is connected to the side plate 14, and the other end of the mounting plate 66 is connected above the water pump 60. The water pump 60 is connected to the side plate 14 through the mounting plate 66, which is convenient for disassembly and assembly of the water pump 60 and convenient for operation.

[0152] Optionally, when the water pump 60 is installed outside the accommodating cavity 13 , the mounting plate 66 is in the shape of a straight plate, and the side plate 14 and the water pump 60 are respectively connected to two sides of the mounting plate 66 .

[0153] Optionally, when the water pump 60 is installed in the accommodating cavity 13 , the mounting plate is L-shaped, so that the mounting plate 66 can be connected to the top of the water pump 60 to improve the connection stability with the water pump 60 , and can also be abutted against and connected to the side plate 14 .

[0154] Optionally, the mounting plate 66 is detachably connected to the side plate 14. The water pump 60 can be removed from the casing by removing the mounting plate 66.

[0155] Optionally, the mounting plate 66 is connected to the side plate 14 by screws. The screw connection makes it easier to disassemble the mounting plate 66 from the side plate 14, and the cost is lower.

[0156] Optionally, the mounting plate 66 is provided with a first screw hole, and the side plate 14 is provided with a second screw hole, the first screw hole and the second screw hole correspond to each other, and screws or bolts pass through the first screw hole and the second screw hole to achieve the connection between the mounting plate 66 and the side plate 14.

[0157] Optionally, there are multiple first screw holes, which are arranged at circumferential intervals along the mounting plate 66, and the number of second screw holes is the same as the number of first screw holes and corresponds one to one, which can improve the connection stability between the mounting plate 66 and the side plate 14.

[0158] Alternatively, if Figures 1 to 3 , Figures 7 to 9 As shown, the indoor unit further includes an electric control box 70, and the length directions of the crossflow fan 30 and the heat exchanger 40 are extended along the length direction of the indoor unit. The electric control box 70 is arranged on one side of the length direction of the indoor unit, and the electric control box 70 is located in the accommodating cavity 13 or outside the accommodating cavity 13. The electric control box is electrically connected to the motor, the water pump, etc., and is used to control the operation of the crossflow fan and the water pump.

[0159] In the disclosed embodiment, the length directions of the crossflow fan 30 and the heat exchanger 40 are extended along the length direction of the indoor unit. The electric control box 70 is arranged on one side of the length direction of the indoor unit and is located inside the accommodating chamber 13 or outside the accommodating chamber 13. In this way, the electric control box 70 is independently arranged and will not interfere with the pipeline assembly 50, thereby improving the convenience of disassembly and assembly of the electric control box 70. In the disclosed embodiment, when the electric control box 70 is located inside the accommodating chamber 13, the internal structure of the indoor unit is more compact, and the electric control box 70 is prevented from being damaged by the external environment. When the electric control box 70 is located outside the accommodating chamber 13, the installation and disassembly of the electric control box 70 is more convenient.

[0160] Optionally, the electric control box 70 is disposed on one side of the length direction of the cross flow fan 30. In this way, the electric control box 70 is conveniently connected to the motor 32 of the cross flow fan 30, so as to reduce the distance between the electric control box 70 and the motor 32 of the cross flow fan 30, and facilitate the wiring of the electric control box 70.

[0161] Optionally, the electric control box 70 is detachably connected to the side panel 14 .

[0162] In the disclosed embodiment, the electric control box 70 is fixed to the side plate 14, so that the electric control box 70 is arranged on the left or right side of the accommodating cavity 13, so that the electric control box 70 does not increase the thickness of the indoor unit.

[0163] Optionally, the electric control box 70 is screwed to the side plate 14. The electric control box 70 and the side plate 14 are screwed, which also makes the disassembly and installation of the electric control box 70 more convenient and reduces the production cost.

[0164] In the disclosed embodiment, the electric control box 70 can be connected to the side panel 14 by screws regardless of whether it is located outside the accommodating cavity 13 or inside the accommodating cavity 13. This facilitates the connection between the electric control box 70 and the side panel 14, and the use of screw connection has low cost and is easy to produce and process.

[0165] Alternatively, if Fig.18 As shown, when the electric control box 70 is located outside the accommodating chamber 13, a clamping plate 71 is provided on the side of the electric control box 70 facing the side plate 14, and a clamping hole 72 is provided on the side plate 14. The clamping plate 71 extends along the height direction of the indoor unit. When the clamping plate 71 is located in the clamping hole 72, the electric control box 70 is connected to the side plate 14. In this way, the clamping plate extends along the height direction of the indoor unit, and the clamping plate can be inserted into or removed from the clamping hole in the vertical direction. Moreover, the structure of the clamping plate and the clamping hole makes it easy to remove the electric control box 70 from the ceiling space.

[0166] Optionally, the card plate extends in a direction from bottom to top, so that the card plate can be inserted into the card hole from bottom to top, and the card plate can also be detached from the card hole in a direction from top to bottom to achieve connection and disassembly of the electric control box 70 and the side panel 14.

[0167] It is understood that the electric control box 70 can also be installed in other positions, such as the electric control box 70 can be installed on one side of the air duct member 20, or on one side of the heat exchanger 40. In actual use, the position of the electric control box 70 can be set according to the size of the indoor unit.

[0168] Alternatively, if Figure 1 and Figure 7 As shown, the crossflow fan 30 includes an impeller 31 and a motor 32. The motor 32 is located on the side of the impeller 31 facing the electric control box 70 and between the impeller 31 and the electric control box 70. The motor 32 is connected to the impeller 31 to drive the impeller 31 to rotate. The motor 32 and the electric control box 70 are arranged on the same side of the impeller 31, which facilitates the electrical connection between the electric control box 70 and the motor 32 and reduces the wiring distance of the circuit.

[0169] Alternatively, if Figure 5 and Figure 6 As shown, the indoor unit also includes a base 33 and a motor cover 34, the base 33 is configured with a mounting groove; the motor cover 34 is arranged below the mounting groove, the motor cover 34 and the mounting groove enclose a motor cavity, and the motor 32 is located in the motor cavity; wherein the motor cover 34 and the base 33 are detachably connected.

[0170] In the disclosed embodiment, the base 33 is configured with a mounting groove, and the mounting groove is used to mount and fix the motor 32. The motor gland 34 can cover the mounting groove, so that the motor gland 34 can fix the motor 32 to prevent the motor 32 from shaking and being damaged. The motor gland 34 is detachably connected to the base 33, so that the motor gland 34 can be removed from the base 33 to facilitate the removal of the motor 32. After the motor is removed, it is also convenient to remove and overhaul the impeller, thereby improving the convenience of overhauling and disassembling the crossflow fan.

[0171] Optionally, the motor gland 34 is configured with a snap-fit ​​hole 36, and the end surface of the base 33 facing the motor gland 34 is configured with a snap 35, and when the snap 35 is located in the snap-fit ​​hole 36, the motor gland 34 is snap-fitted with the base 33. The convenience of disassembly and installation of the motor gland 34 and the base 33 is improved.

[0172] Optionally, when the motor cover 34 is snapped into engagement with the base 33, the buckle 35 includes a first clamping plate 351 and a second clamping plate 352, and the second clamping plate 352 is spaced apart from and arranged side by side with the first clamping plate 351; wherein the first clamping plate 351 and the second clamping plate 352 are made of elastic materials, and the first clamping plate 351 and the second clamping plate 352 can move toward or away from each other, and when the first clamping plate 351 and the second clamping plate 352 move toward each other, the first clamping plate 351 and the second clamping plate 352 undergo elastic deformation and can detach from the snapping hole 36.

[0173] In the embodiment of the present disclosure, the first clamping plate 351 and the second clamping plate 352 can move toward each other or away from each other, so that when the first clamping plate 351 and the second clamping plate 352 are in the original state, the first clamping plate 351 and the second clamping plate 352 can be clamped with the clamping hole 36 to prevent the buckle 35 from being separated from the clamping hole 36. When the first clamping plate 351 and the second clamping plate 352 are pinched and moved toward each other, the area of ​​the buckle 35 formed by the first clamping plate 351 and the second clamping plate 352 is reduced, and the first clamping plate 351 and the second clamping plate 352 can be separated from the clamping hole 36, so that the buckle 35 is separated from the clamping hole 36. In this way, when it is necessary to disassemble the motor gland 34, by pinching the first clamping plate 351 and the second clamping plate 352 and moving them toward each other, the buckle 35 can be separated from the clamping hole 36, so that the motor gland 34 and the base 33 are separated.

[0174] Optionally, the buckle 35 extends toward the air inlet 11, so that when the cross-flow fan 30 is removed from the air inlet 11, the buckle 35 directly faces the air inlet 11, and the connection and removal of the buckle 35 and the snap-on hole 36 can be achieved by moving the first clip 351 and the second clip 352.

[0175] Optionally, the motor cover 34 and the base 33 are arranged in sequence along the direction from the air inlet 11 to the cross-flow fan 30 , so that the motor cover 34 faces the air inlet 11 , which facilitates the removal and installation of the motor cover 34 .

[0176] Optionally, the motor gland 34 is screwed to the base 33. This can also improve the convenience of connecting the motor gland 34 and the base 33, and the operation is simple and the cost is low.

[0177] Optionally, when the motor cover 34 and the base 33 are connected by screws, both the motor cover 34 and the base 33 are provided with screw holes, and the screw holes extend from the direction from the cross-flow fan 30 to the air inlet 11, so that the screws connecting the cover and the base 33 can be moved in and out from the air inlet 11.

[0178] Alternatively, if Figure 6 As shown, the air duct member 20 is an integrated structure. Compared with the split air duct member 20, the integrated air duct member 20 has lower assembly requirements, which is convenient for the installation of the air duct member 20 in the indoor unit. In addition, there will be no gaps in the air duct member 20, and there will be no problems such as air volume loss and abnormal noise, which can further reduce noise and ensure the air outlet effect.

[0179] Optionally, the air duct member 20 and the base 33 are an integrated structure.

[0180] In the disclosed embodiment, the duct member 20 and the base 33 are also an integrated structure, which facilitates the production and processing of the duct member 20 and eliminates the need to assemble the base 33 separately, thereby avoiding the situation where the split duct member 20 and base 33 are inaccurately assembled or deformed and cannot be installed.

[0181] In some optional embodiments, such as Figure 3 As shown, the top wall of the indoor unit includes the top wall of the casing and at least part of the upper side wall of the duct member 20. At least part of the upper side wall of the duct member 20 can be directly used as the top wall of the indoor unit, so compared with completely using the top wall of the casing as the top wall of the duct member 20, using at least part of the upper side wall of the duct member 20 as the top wall of the indoor unit can further reduce the product cost of the indoor unit, and can also further reduce the thickness of the indoor unit.

[0182] Optionally, the top wall 26 of the air duct member is arc-shaped, and the arc-shaped opening faces the air duct 21. This makes the air flow in the air duct 21 smoother, reduces air flow loss, and ensures air volume.

[0183] Optionally, the outer wall surface of the top wall 26 of the duct member is provided with a reinforcing rib 28, and the upper wall surface of the reinforcing rib 28 includes a first wall surface, which extends in a horizontal direction. The first wall surface and the outer wall surface of the top wall of the casing form the outer wall surface of the upper side wall of the indoor unit, and the first wall surface is flush with the outer wall surface of the top wall of the casing, so that the upper wall surface of the indoor unit can be in the same plane, which facilitates the horizontal placement of the indoor unit.

[0184] Optionally, the upper wall surface of the reinforcing rib 28 also includes a second wall surface, which is connected to the first wall surface and is located below the top wall of the casing, so that the reinforcing rib 28 can support the top wall of the casing and improve the setting stability and strength of the top wall of the casing.

[0185] Optionally, the reinforcing rib 28 extends along the flow direction of the airflow in the air duct 21, the lower end of the reinforcing rib 28 is connected to the outer wall surface of the top wall 26 of the air duct member, and the wall surface of the upper end of the reinforcing rib 28 includes the first wall surface. In this way, the upper end of the reinforcing rib 28 extends in the horizontal direction so that the top wall of the indoor unit can be in the same horizontal plane. Moreover, the reinforcing rib 28 can improve the structural strength of the air duct member 20.

[0186] Optionally, the reinforcing ribs 28 extend along the width direction of the indoor unit, and the number of the reinforcing ribs 28 is multiple, and the multiple reinforcing ribs 28 are sequentially spaced along the width direction of the air duct member 20 (that is, the width direction of the indoor unit). In this way, the multiple reinforcing ribs 28 make the top wall of the indoor unit located in the same plane.

[0187] Optionally, the outer wall surface of the upper top wall of the air duct member 20 is further provided with connecting ribs, which extend along the length direction of the indoor unit and are connected between a plurality of reinforcing ribs 28. This can ensure the stability of the setting of the connecting ribs and prevent the deformation of the reinforcing ribs 28.

[0188] Optionally, there are multiple connecting ribs, and the multiple connecting ribs are arranged in sequence and at intervals along the air flow direction in the air duct 21 (that is, the width direction of the indoor unit), so as to improve the strength of the top wall 26 of the air duct component.

[0189] In some other optional embodiments, the top wall of the casing is the top wall of the indoor unit, that is, the top wall of the casing completely covers the top wall of the duct member.

[0190] Optionally, the top wall and / or the bottom wall of the housing extends in a horizontal direction.

[0191] In the disclosed embodiment, the duct member 20 is located inside the casing, and the top wall and / or bottom wall of the casing can extend in the horizontal direction, so that the top and bottom walls of the indoor unit are both extended in the horizontal direction, which facilitates the arrangement and installation of the indoor unit, so that the indoor unit can be installed more closely on the ceiling, reducing the space occupied by the indoor unit in the suspended ceiling.

[0192] Alternatively, if Figure 5 and Fig.16 As shown, the axial length of the heat exchanger 40 is greater than the axial length of the impeller 31 .

[0193] In the disclosed embodiment, the axial length of the impeller of the cross-flow fan is less than the axial length of the heat exchanger, and the heat exchanger and the impeller are both located in the air duct, which can increase the heat exchange area of ​​the airflow flowing through the impeller and the heat exchanger in the length direction, without increasing the height of the heat exchanger, thereby improving the heat exchange efficiency of the indoor unit. In this way, the length of the heat exchanger is greater than the length of the impeller, which can ensure the heat exchange capacity of the heat exchanger without increasing the height of the heat exchanger, and thus will not increase the height of the indoor unit, thereby reducing the thickness of the ceiling, freeing up more indoor space, and improving the user experience. When the airflow at the impeller 31 flows along the air duct 21 to the heat exchanger 40, due to the long length of the heat exchanger 40, the airflow flow area from the impeller 31 to the heat exchanger 40 can be increased, which can reduce the wind pressure in the center of the air duct 21 and disperse the wind speed to reduce the wind speed difference between the center and both sides of the air duct 21, thereby playing a flow balancing role and making the airflow in the air duct 21 flow more evenly. In this way, the airflow in the air duct 21 can fully exchange heat with the heat exchanger 40 in the length direction, thereby improving the heat exchange efficiency with the heat exchanger 40 to a certain extent and reducing noise.

[0194] Optionally, along the flow direction of the air flow in the air duct 21 , the length of the air duct member 20 gradually increases, so as to ensure that the air outlet of the impeller 31 can flow to the heat exchanger 40 .

[0195] Optionally, along the flow direction of the airflow in the air outlet cavity, the length and height of at least part of the air outlet cavity are gradually increased. Here, the fan cavity 211 is used to place the fan, and the length and height of at least part of the air outlet cavity are gradually increased, so that the flow area of ​​the air duct 21 can be increased from the length direction and the height direction, so that the airflow can be decelerated, the airflow velocity at the periphery of the air duct 21 and the airflow velocity at the center are reduced, the noise is reduced, and the airflow velocity is slowed down, and the airflow can more fully exchange heat with the heat exchanger 40 to ensure the heat exchange area.

[0196] Optionally, the motor 32 is arranged at the first end of the impeller 31 in the length direction; wherein the second end of the impeller 31 in the length direction is flush with the second end of the heat exchanger 40 in the length direction, and the first end of the heat exchanger 40 in the length direction protrudes from the first end of the impeller 31 in the length direction.

[0197] In the disclosed embodiment, the impeller 31 is flush with one end of the heat exchanger 40, and the second end of the heat exchanger 40 protrudes from the second end of the heat exchanger 40, which facilitates the installation of the heat exchanger 40 and the crossflow fan 30, and also facilitates the production and processing of the air duct 21 in the shell. In addition, only one end of the heat exchanger 40 is protruded from the impeller 31, which can ensure that the space outside one side of the air duct 21 is larger, and the components can be placed in a centralized manner, thereby improving the compactness of the overall structure.

[0198] Optionally, the duct member 20 includes a side duct plate, which is located on the left side and / or the right side of the duct, and a side duct plate includes a first side duct plate and a second side duct plate connected in sequence along the airflow direction in the duct, the first side duct plate is located on one side of the fan cavity, and the second side duct plate is located on one side of the air outlet cavity; wherein the second side duct plate includes a curved duct plate 291 with a smooth transition.

[0199] In the disclosed embodiment, the second side air duct plate includes a smoothly transitioned arc-shaped air duct plate 291, which makes the inner wall of the air duct smoother and reduces the flow loss of the air flow in the air duct, so that the air flow of the cross-flow fan can flow smoothly to the heat exchanger.

[0200] Optionally, the opening of the arc-shaped air duct plate 291 is away from the air duct, so that the length of the air duct along the air flow direction can be gradually increased.

[0201] Optionally, the number of the side duct plates is one or two. When the number of the side duct plates is two, the two side duct plates are respectively located on the left and right sides of the duct, wherein at least one side duct plate includes an arc-shaped duct plate 291. Here, the structure of the side duct plate is adjusted according to the length setting of the heat exchanger and the impeller.

[0202] Optionally, the duct member 20 includes a lower duct plate and an upper duct plate, the lower duct plate is constructed with a volute tongue 27, and the volute tongue 27 cooperates with the impeller 31; the upper duct plate is located above the lower duct plate, and encloses the air outlet 21 together with the lower duct plate, wherein along the flow direction of the airflow in the duct 21, the distance between the upper duct plate and the lower duct plate gradually increases, here, the top wall 26 of the duct member includes the upper duct plate, and the bottom wall of the duct member includes the lower duct plate.

[0203] In the disclosed embodiment, the upper duct plate and the lower duct plate enclose the air outlet duct 21 from the top and bottom directions, and the distance between the upper duct plate and the lower duct plate gradually increases along the flow direction of the airflow in the air duct 21, so that a diffusion chamber 212 can be formed, and the airflow in the diffusion chamber can be decelerated, and the difference between the airflow velocity at the periphery of the air duct 21 and the airflow velocity at the center is reduced, thereby reducing noise, and the airflow velocity is slowed down, so that the airflow can more fully exchange heat with the heat exchanger 40 to ensure the heat exchange area.

[0204] Alternatively, if Fig.10 , Figure 13 to Figure 14 As shown, a noise reduction structure is constructed in the air duct 21. The noise reduction structure is constructed in the air duct 21, which can reduce the noise in the air duct 21, thereby reducing the noise when the indoor unit is working and improving the user experience.

[0205] Alternatively, if Fig.10 and Fig.17As shown, part of the wall surface of the air duct 21 protrudes toward the inside of the air duct 21 to form a step structure 23 . The step structure 23 is used to prevent the airflow in the air duct 21 from flowing back. The noise reduction structure includes the step structure 23 .

[0206] In the disclosed embodiment, the step structure 23 can prevent the airflow in the air duct 21 from flowing back. Since the heat exchanger 40 is located on the air outlet side of the cross-flow fan 30, the airflow resistance at the heat exchanger 40 is relatively large. The airflow at the end of the air duct 21 near the heat exchanger 40 will partially flow back along the boundary of the air duct 21 after encountering the resistance. This will cause the air flow inside the air duct 21 to be turbulent and the noise level to be relatively high. A step structure 23 is provided in the air duct 21, and the step structure 23 protrudes toward the inside of the air duct 21. In this way, the step structure 23 can prevent the airflow in the air duct 21 from flowing back, thereby forcing the airflow in the air duct 21 to flow smoothly. This can reduce the noise in the air duct 21 and thereby reduce the noise of the indoor unit. In addition, the step structure 23 prevents the airflow from flowing back, and can also avoid airflow turbulence in the air duct, stabilize the internal flow field of the airflow, and thereby ensure the air output of the indoor unit. When the step structure is not provided in the air duct, such as Figure 22-1 As shown in Figure 1, the airflow backflow in the air duct is obvious. When a step structure is set in the air duct, such as Figure 22-2 As shown, the airflow backflow is blocked and the noise is significantly reduced. Such a noise reduction structure is simple and easy to operate, low cost, simple mechanism and high reliability.

[0207] Optionally, the step structure 23 includes one or more steps. When the step structure 23 includes a plurality of steps, the protruding heights of the plurality of steps gradually increase along the direction from the heat exchanger 40 to the cross-flow blower 30 .

[0208] In the embodiment of the present disclosure, the step structure 23 can be provided with one step or multiple steps. When multiple steps are provided, the protruding height of the step gradually increases in the direction away from the heat exchanger 40, so that the multiple steps can gradually guide the airflow to form an airflow vortex, thereby avoiding the formation of fierce airflow collisions in the air duct 21, thereby effectively reducing noise, avoiding surging noise caused by airflow backflow, and ensuring the smoothness of the airflow in the air duct 21 to ensure the air outlet effect.

[0209] Optionally, the multiple steps include a first step 231, a second step 232 and a third step 233, the second step 232 is located on the side of the first step 231 facing the cross-flow fan 30; the third step 233 is located on the side of the second step 232 facing the cross-flow fan 30; wherein the height difference between the second step 232 and the first step 231 is smaller than the height difference between the third step 233 and the second step 232.

[0210] In the embodiment of the present disclosure, when multiple steps are provided, the height of the protruding steps gradually increases in the direction away from the heat exchanger 40, and the height difference between two adjacent steps gradually increases. This can gradually guide the airflow to form a vortex, avoid airflow collision in the air duct 21, and thereby improve the noise reduction effect of the step structure and the effect of stabilizing the internal flow field of the airflow.

[0211] Optionally, when there are multiple steps, the multiple steps extend in a stepped shape, and the multiple steps include a fourth step and a fifth step, the fifth step is arranged adjacent to the fourth step, and the fifth step is located on the side of the fourth step facing the cross-flow fan 30; wherein, h4 / L4≤h5 / L5, wherein h4 is the protruding height of the fourth step, L4 is the horizontal distance from the end of the fourth step away from the center of the air duct to the heat exchanger or the horizontal distance from the end of the fourth step away from the center of the air duct to the end of the step adjacent to the side of the fourth step facing the heat exchanger away from the center of the air duct, and h5 is the protruding height of the fifth step, and L5 is the horizontal distance from the end of the fourth step away from the center of the air duct to the end of the fifth step away from the center of the air duct.

[0212] In the disclosed embodiment, the fifth step is located on the side of the fourth step close to the cross-flow fan 30, the protruding height of the fifth step is greater than the height of the fourth step, and / or the distance between the fifth step and the fourth step is less than the distance between the fourth step and the adjacent step on the side of the fourth step facing the heat exchanger 40 or the distance between the fourth step and the heat exchanger 40, so that the height of the step gradually increases in the direction away from the heat exchanger 40 to improve the blocking effect on the return airflow, or the density of the steps increases in the direction away from the heat exchanger 40, so that the blocking effect on the return airflow can be gradually improved, thereby avoiding the formation of fierce airflow collisions in the air duct 21 and reducing noise. It should be noted that the fourth step can be any one of the first step, the second step and the third step, and the fifth step is an adjacent step on the side of any one of the first step, the second step and the third step facing the cross-flow fan.

[0213] Optionally, when the first step, the second step and the third step are arranged adjacent to each other, h1 / L1≤h2 / L2≤h3 / L3. h1, h2, and h3 are the protruding heights of the first step, the second step, and the third step, respectively; L1 is the horizontal distance from the end of the first step at the center of the air duct to the heat exchanger or the horizontal distance from the end of the first step away from the center of the air duct to the end of the step adjacent to the side of the first step facing the heat exchanger away from the center of the air duct; L2 is the horizontal distance from the end of the first step away from the center of the air duct to the end of the second step away from the center of the air duct; and L3 is the horizontal distance from the end of the second step away from the center of the air duct to the end of the third step away from the center of the air duct.

[0214] Optionally, H / W≤1 / 3, wherein H is the sum of the heights of the protrusions of the multiple steps, and W is the height of the orthographic projection of the windward surface 43 of the heat exchanger 40 along the direction from the cross-flow fan 30 to the heat exchanger 40 .

[0215] In the disclosed embodiment, the sum of the heights of the protruding steps is less than 1 / 3 of the height of the direct projection of the windward surface 43 of the heat exchanger 40 along the direction from the cross-flow fan 30 to the heat exchanger 40. This ensures the flow area of ​​the air duct 21 and avoids the flow area of ​​the air duct 21 corresponding to the steps being too small, thereby increasing the airflow resistance and affecting the air volume.

[0216] Optionally, H / W is positively correlated with W / D, where H is the sum of the heights of multiple steps, W is the height of the direct projection of the windward surface 43 of the heat exchanger 40 along the direction from the cross-flow fan 30 to the heat exchanger 40, and D is the height of the air duct 21 corresponding to the step of the closest cross-flow fan 30.

[0217] In the disclosed embodiment, the greater the height of the windward surface 43 of the heat exchanger 40, the greater the resistance of the heat exchanger 40, the more the return airflow, and the higher the height of the step, the greater the blocking effect on the return airflow, and the noise reduction effect. When the size of the indoor unit is fixed or changes slightly, the height of the air duct 21 changes slightly, and the heat exchange amount is adjusted by adjusting the shape or size of the heat exchanger. When the windward surface of the heat exchanger increases, the height of the step also increases accordingly to improve the noise reduction effect and the effect of stabilizing the airflow field.

[0218] Optionally, along the flow direction of the airflow in the air duct, the step is inclined in a direction away from the center of the air duct, so as to buffer the contact surface between the airflow and the step and avoid a fierce airflow collision between the step and the airflow.

[0219] Optionally, the upper air duct plate includes a first connecting plate and a second connecting plate, the first connecting plate is located above the impeller 31 and extends toward the heat exchanger 40, and the second connecting plate is connected between the end of the first connecting plate facing the heat exchanger 40 and the upper end of the heat exchanger 40. The second connecting plate is configured with a noise reduction structure, the noise reduction structure includes a step structure 23; and / or, along the flow direction of the airflow in the air duct 21, the first connecting plate is inclined downward.

[0220] In the disclosed embodiment, the upper air duct plate includes a first connecting plate and a second connecting plate. The first connecting plate is close to the cross-flow fan 30, and the second connecting plate is close to the heat exchanger 40. The first connecting plate is inclined downward along the flow direction of the airflow in the air duct 21. This can avoid the height of the second connecting plate connected to the first connecting plate being too high. This makes it convenient to set a noise reduction structure on the second connecting plate. The second connecting plate is located downstream of the air duct 21, where the airflow is easily accumulated to generate noise. Setting a noise reduction structure on the second connecting plate can reduce the noise of the entire air duct 21.

[0221] Optionally, the first connecting plate and the second connecting plate are detachably connected, which not only facilitates the disassembly of the air duct member 20, but also, since the second connecting plate is provided with a step structure 23, the second connecting plate can be replaced as required to adapt to different indoor units, thereby improving the noise reduction effect.

[0222] Optionally, the air duct member 20 includes an air duct portion and a noise reduction portion, the noise reduction portion includes a second connecting plate, the air duct portion includes a first connecting plate, the air duct portion encloses the blower cavity 211 and the pressure diffuser cavity 212, the second connecting plate encloses the blower cavity 211, and the air duct portion is an integrated structure. This facilitates the installation of the air duct member 20, and there will be no gap in the air duct portion, no air volume loss and abnormal sound problems, and the noise can be further reduced to ensure the air outlet effect.

[0223] Optionally, the step structure 23 corresponds to the windward surface 43 of the first heat exchange section 41 , and along the height direction of the indoor unit, at least a portion of the projection of the step structure 23 is located within the projection of the first heat exchange section 41 .

[0224] In the disclosed embodiment, since the first heat exchange section 41 is arranged at an angle, the length of the air duct 21 at the end of the first heat exchange section 41 close to the air outlet 12 is greater than the length of the air duct 21 at the end of the first heat exchange section 41 away from the air outlet 12. The step structure 23 corresponds to the windward surface 43 of the first heat exchange section 41. The step structure 23 can be closer to the heat exchanger 40, thereby improving the blocking effect on the return airflow and improving the noise reduction effect.

[0225] Optionally, when the noise reduction structure includes a step structure 23, the horizontal distance between the end of the step structure 23 close to the heat exchanger 40 and the windward surface 43 of the heat exchanger 40 is smaller than the shortest horizontal distance between the end of the step structure 23 close to the heat exchanger 40 and the outer peripheral wall of the cross-flow fan 30.

[0226] In the disclosed embodiment, the step structure 23 is closer to the heat exchanger 40. Since the heat exchanger 40 is located at the end of the air duct 21, the airflow is easily accumulated at the end of the air duct 21, and the airflow is easy to flow back. Therefore, the end of the step structure 23 facing the heat exchanger 40 should be close to the heat exchanger 40. This can improve the blocking effect on the return airflow, force the airflow inside the air duct 21 to be smooth, reduce noise and stabilize the airflow field.

[0227] Optionally, the step structure 23 is disposed adjacent to the heat exchanger 40 at one end facing the heat exchanger, which can prevent the airflow backflow to the greatest extent and reduce the noise in the air duct 21 .

[0228] Alternatively, if Fig.10 , Fig.13 and Fig.14 As shown, an exhaust passage 24 is opened on the side wall of the air duct 21 , and the exhaust passage 24 connects the outside of the air duct 21 and the inside of the air duct 21 . The noise reduction structure includes the exhaust passage 24 .

[0229] In the disclosed embodiment, since the resistance of the heat exchanger 40 is relatively large, after the airflow encounters resistance at the end of the air duct 21, a vortex phenomenon will be formed at the air outlet 12 of the air duct 21, causing internal flow disorder, affecting the air volume and also affecting the noise value. An exhaust duct 24 is provided on the side wall of the air duct 21. The exhaust duct 24 can discharge the airflow in the air duct 21, eliminate the airflow vortex, and force the internal airflow to be smooth, which can also reduce the noise in the air duct 21. In addition, the exhaust duct 24 can discharge the airflow vortex in the air duct, stabilize the internal flow field of the airflow, and thus ensure the air output of the indoor unit. Combined with Figure 23-1 and Figure 23-2 As shown, when there is no exhaust channel in the air duct, Figure 23-1 As shown in the figure, there is obvious swirling airflow in the air duct, which can cause abnormal sound in the air duct, air volume loss and other problems. Figure 23-2 As shown in the figure, the air vortex in the air duct disappears and is discharged outside the air duct, making the air flow in the air duct smoother, the air volume increased, and the noise reduced or even eliminated. In this way, there is no need to add new parts for noise reduction, the cost investment is low, simple, and the reliability is high.

[0230] Optionally, at least one of the left and right walls of the air duct 21 is provided with an exhaust channel 24 , and the distance between the center of the exhaust channel 24 and the heat exchanger 40 is smaller than the distance between the center of the exhaust channel 24 and the cross-flow fan 30 .

[0231] In the disclosed embodiment, the heat exchanger 40 is located at the end of the air duct 21. Therefore, the air flow resistance at a position close to the heat exchanger 40 in the air duct 21 is larger, and more vortices are formed. The exhaust passage 24 is located closer to the heat exchanger 40, which can better discharge the vortices in the air duct 21, forcing the air flow in the air duct 21 to be smooth, reducing the noise in the air duct 21 and stabilizing the air flow field.

[0232] Optionally, the exhaust passage 24 includes an exhaust grille 241 , which is in a long strip shape, and two ends of the exhaust grille 241 in a height direction are respectively located at the upper and lower sides of a center line of the air duct 21 .

[0233] In the disclosed embodiment, the exhaust passage 24 is in a grille shape, and the opening area of ​​the grille is larger than the opening area of ​​the hole shape, so that the airflow resistance of the exhaust grille 241 can be reduced, the exhaust effect and exhaust volume can be improved, and the vortex in the air duct 21 can be effectively reduced to reduce noise. The exhaust grille 241 extends along the height direction of the air duct 21, and the two ends of the exhaust grille 241 are respectively located at the upper and lower sides of the center line of the air duct 21, so that the exhaust area in the height direction of the air duct 21 is increased, and the noise reduction effect and the effect of stabilizing the flow field are improved.

[0234] Optionally, the exhaust passage 24 includes one exhaust grille 241 or a plurality of exhaust grilles 241 arranged side by side, and the exhaust grilles 241 are arranged obliquely and have an angle with the horizontal direction.

[0235] In the disclosed embodiment, the number of exhaust grilles 241 can be different according to the different settings of the air duct 21. The exhaust grilles 241 are tilted, which can further increase the exhaust area of ​​the exhaust grilles 241, improve the exhaust effect and exhaust speed, and improve the noise reduction effect and the effect of stabilizing the flow field. Moreover, the exhaust grilles 241 can be tilted along the flow direction of the airflow in the air duct 21, which can also improve the exhaust effect of the airflow. Optionally, in actual applications, the exhaust grilles 241 can be tilted upward or downward along the flow direction of the airflow in the air duct. In actual use, the tilt direction of the exhaust grilles 241 can be adjusted according to the setting of the heat exchanger. Preferably, along the flow direction of the airflow in the air duct, the tilt directions of the first heat exchange section and the exhaust grille are the same.

[0236] Alternatively, if Fig.17 As shown, when the exhaust grille 241 is tilted, the angle between the exhaust grille 241 and the horizontal direction is in the range of 50°≤a≤90°. When the angle between the exhaust grille 241 and the horizontal direction is less than 50°, the area of ​​the exhaust grille 241 along the airflow direction in the air duct 21 is large, which will cause serious air leakage in the air duct 21 and affect the air output. For example, the angle between the exhaust grille 241 and the horizontal direction is 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc.

[0237] Preferably, the exhaust grille is arranged in parallel with the heat exchanger, so that the vortex formed by the airflow in the air duct flowing to the heat exchanger corresponds to the structure of the heat exchanger, and the exhaust grille is arranged in parallel with the heat exchanger, so that more vortices in the air duct can be discharged.

[0238] Alternatively, if Fig.14 As shown, a first return air channel 292 is defined between the casing and the air duct member 20, and the first return air channel 292 is connected between the exhaust channel 24 and the air inlet 11, so that the airflow of the exhaust channel 24 can flow to the air inlet 11 through the first return air channel; and / or, the air duct member 20 defines a second return air channel 293, and the second return air channel 293 is connected between the exhaust channel 24 and the air inlet 11, so that the airflow of the exhaust channel 24 can flow to the air inlet 11 through the second return air channel. Fig.14 The middle arrows indicate the flow directions of the airflow in the first return air channel and the second return air channel.

[0239] In the disclosed embodiment, the airflow discharged from the exhaust channel 24 flows back to the air inlet 11 through the first return air channel and / or the second return air channel. Here, the first return air channel and the second return air channel are both located in the housing, that is, the airflow in the air duct 21 flowing out of the exhaust channel 24 will not flow into the environment outside the housing, but will return to the air inlet inside the housing for another cycle. Since the indoor unit is located in the suspended ceiling, the space inside the suspended ceiling is relatively closed, and the airflow from the exhaust channel 24 will not be discharged to the outside of the indoor unit, that is, it will not enter the suspended ceiling, will not affect the pressure inside the suspended ceiling, and will not cause the airflow in the suspended ceiling to be turbulent and cause dust to fly. The dust in the suspended ceiling will not enter the air duct 21 through the exhaust channel 24, so as to avoid dust entering the air duct 21 and affecting the operation of the fan, thereby ensuring the normal operation of the indoor unit.

[0240] Optionally, when a first return air channel is defined between the casing and the air duct member 20, the casing includes a side panel 14, and the side panel 14 is located on the outside of the left side wall of the air duct 21 and / or the right side wall of the air duct 21, and the side panel 14 and the left side wall of the air duct 21 and / or the right side wall of the air duct 21 enclose the first return air channel.

[0241] In the disclosed embodiment, the side panel 14 and the left side wall of the air duct member 20 and / or the right side wall of the air duct 21 can directly enclose a first return air channel, so that the side panel 14 can prevent the airflow out of the exhaust channel 24 from flowing to the outside of the casing.

[0242] Optionally, when the duct member 20 defines a second return air channel, the duct member 20 includes a duct member body and a duct side plate 29, and the duct member body defines the air duct 21; the duct side plate 29 is connected to the duct member body and is located on the outside of the exhaust channel 24, and the duct side plate 29 and the duct member body enclose a second return air channel.

[0243] In the disclosed embodiment, the duct member 20 itself can also define a second return air channel, and the duct side panel 29 is located on the outside of the exhaust channel 24. In this way, when there are other components between the duct member 20 and the side panel 14, the duct side panel 29 can prevent the airflow of the exhaust channel 24 from flowing to other components, and can ensure that the airflow discharged from the exhaust channel 24 can flow to the air inlet 11 through the second return air channel.

[0244] Optionally, the refrigerant pipe 54 connected to the heat exchanger 40 is located on the side of the duct side plate 29 away from the duct component body, so that the duct side plate 29 can prevent the airflow flowing out of the exhaust channel 24 from exchanging heat with the refrigerant pipe 54, thereby avoiding changes in the refrigerant medium temperature of the refrigerant pipe 54 and affecting the normal operation of the indoor unit.

[0245] Optionally, the area of ​​the exhaust channel 24 corresponding to the heat exchange cavity 213 is greater than the area of ​​the exhaust channel 24 corresponding to the pressure diffusion cavity 212 .

[0246] In the disclosed embodiment, the heat exchange chamber 213 is located at the end of the air duct 21, and the area of ​​the exhaust channel 24 of the heat exchange chamber 213 is larger than the area of ​​the exhaust channel 24 of the diffusion chamber 212. This can improve the exhaust effect of the heat exchange chamber 213 and thus ensure the noise reduction effect.

[0247] Optionally, the duct member 20 includes side duct plates, and the two side duct plates are located on the left and right sides of the duct 21. The left side wall of the duct includes the left duct plate, and the right side wall of the duct includes the right duct plate, wherein the side duct plate is constructed with a noise reduction structure, and the noise reduction structure includes an exhaust channel 24.

[0248] Alternatively, if Figure 6 As shown, guide ribs 80 are also provided in the air duct 21. The guide ribs 80 are provided on the inner wall of the air duct 21. The guide ribs 80 include first guide ribs 81. The number of first guide ribs 81 is one or more, and at least one first guide rib 81 is located in the middle of the length direction of the air duct. In this way, when the air in the air duct 21 flows to the first guide rib 81, the first guide rib 81 can rectify the air, so that the airflow in the air duct 21 is roughly evenly distributed along the length direction of the air duct, so that the position of the eccentric vortex is relatively stable, the eccentric vortex is prevented from swaying, and backflow is avoided, thereby reducing noise. Moreover, the method of setting the first guide rib 81 is low-cost and easy to implement. Among them, Fig.19 The middle arrow indicates the length direction of the air duct 21 .

[0249] Optionally, there are multiple first guide ribs 81, and multiple first guide ribs 81 are arranged in sequence along the length direction of the air duct 21, so that the more evenly the first guide ribs 81 are distributed along the length direction of the air duct 21, the better the rectification effect. Among them, multiple first guide ribs 81 are respectively located on the opposite sides of the at least one first guide rib 81 and / or the distance between two adjacent first guide ribs 81 is greater than or equal to 30mm and less than or equal to 120mm. Here, if the distance between two adjacent first guide ribs 81 is less than 30, it will be too dense, increasing the air flow resistance, and if the distance between two adjacent first guide ribs 81 is greater than 120mm, the rectification effect will be poor.

[0250] Optionally, the guide ribs 80 extend along the flow direction of the airflow in the air duct 21, so as to facilitate the air flow and achieve rectification.

[0251] Optionally, the guide rib 80 includes a first end and a second end sequentially arranged along the flow direction of the airflow, and along the flow direction of the airflow in the air duct 21, the first end is inclined toward a direction close to the center of the air duct 21 and / or the second end is inclined toward a direction away from the center of the air duct 21, so as to reduce the resistance of the end of the guide rib 80 to the airflow.

[0252] Optionally, the inner wall surface of the upper air duct plate and / or the inner wall surface of the lower air duct plate 263 is provided with a first guide rib 81. In this way, the air duct 21 can rectify the airflow in both the upper and lower directions.

[0253] Optionally, the first guide ribs 81 on the inner wall surface of the upper air duct plate and the first guide ribs 81 on the inner wall surface of the lower air duct plate 263 are staggered to further improve the rectification effect.

[0254] Optionally, the guide rib 80 further includes a second guide rib 82, and the inner wall surface of the left wall of the air duct 21 and / or the inner wall surface of the right wall of the air duct 21 is provided with the second guide rib 82. In this way, the airflow can also be rectified in the left and right directions of the air duct 21.

[0255] Optionally, the second guide rib 82 is arranged on the wall of the exhaust grille 241 facing the air duct 21, and the second guide rib 82 is connected between multiple exhaust grilles 241, so that the second guide rib 82 can not only play a rectifying role, but also improve the strength of the exhaust grille 241, thereby ensuring the strength of the air duct component 20.

[0256] Alternatively, if Figures 19 to 21 As shown, the volute tongue 27 includes a first section 273 and a second section 274, which are arranged in sequence along the flow direction of the airflow in the air duct 21, and the connection between the first section 273 and the second section 274 forms a bend toward the axis of the air duct 21, wherein the volute tongue 27 is detachably connected to the air duct member 20. This facilitates the production and processing of the air duct member 20 and reduces costs.

[0257] Optionally, the volute tongue 27 is snap-fitted to the air duct member for easy operation.

[0258] Optionally, the second section 274 of the volute tongue 27 is provided with a pressure relief hole 271. The pressure relief hole 271 is provided in the second section 274, and the vortex with higher pressure in the air duct 21 can be discharged through the pressure relief hole 271 to achieve pressure relief, so that the airflow in the entire air duct 21 becomes relatively smooth, and the position of the eccentric vortex becomes relatively stable, reducing turbulence, thereby reducing noise. The first section 273 is not provided with a pressure relief hole 271, and the pressure relief hole 271 is provided in the second section 274, which can not only achieve pressure relief, but also prevent the air in the air duct 21 from being discharged through the first section 273 and affecting the air output of the indoor unit.

[0259] Optionally, the distance between the pressure relief hole 271 and the bend is greater than or equal to 5 mm and less than or equal to 15 mm. Here, the distance between the pressure relief hole 271 and the bend is less than 5 mm, which is too far from the heat exchanger 40, and the pressure relief effect is not obvious. If the distance between the pressure relief hole 271 and the bend is greater than 15 mm, when the size of the volute tongue 27 is constant, the area where the pressure relief hole 271 can be set on the second section 274 will be limited, and the total opening area of ​​the pressure relief hole 271 cannot meet the requirements.

[0260] Optionally, the second section 274 includes a pressure relief area and a non-pressure relief area, and the pressure relief area and the non-pressure relief area are arranged in sequence along the length direction of the volute tongue 27, wherein the pressure relief hole 271 is arranged in the pressure relief area. When the airflow in the air duct 21 hits the volute tongue 27, the time when the airflow reaches the pressure relief area and the non-pressure relief area is inconsistent, which effectively avoids the resonance peak caused by the superposition of pulsations in the same frequency band, thereby reducing the noise value.

[0261] Optionally, a plurality of pressure relief holes 271 are provided in each pressure relief area, at least two pressure relief holes 271 are arranged in sequence along the length direction of the volute tongue 27 and / or at least two pressure relief holes 271 are arranged in sequence along the flow direction of the airflow in the air duct 21 .

[0262] Optionally, the volute tongue 27 is arranged on the upper wall surface of the lower air duct plate 263, and the lower air duct plate 263 is provided with a pressure relief channel 272 connected to the pressure relief hole 271. In this way, the airflow in the air duct 21 can flow out more smoothly.

[0263] Optionally, the volute tongue 27 is provided with a hook 275, and the hook 275 is engaged with the pressure relief channel 272. In this way, the pressure relief channel 272 can not only realize the detachability of the volute tongue 27, but also facilitate pressure relief.

[0264] Optionally, the volute tongue 27 and the lower air duct plate 263 define a silencer chamber 276 , and the silencer chamber 276 is connected to the pressure relief hole 271 , so that the pressure relief hole 271 can not only relieve pressure, but the pressure relief hole 271 and the silencer chamber 276 can also form a Helmholtz resonance silencer chamber 276 .

[0265] Here, the silencer chamber 276 is a closed structure. When the frequency of the incident sound wave in the silencer chamber 276 is close to the natural frequency of the resonator formed by the silencer chamber 276 and the pressure relief hole 271, the air column at the pressure relief hole 271 vibrates strongly. During the vibration process, the sound energy is consumed by overcoming the friction resistance, thereby achieving sound absorption.

[0266] An embodiment of the present disclosure further provides an air conditioner, comprising an indoor unit as described in any one of the above embodiments.

[0267] The air conditioner provided in the embodiment of the present disclosure includes the indoor unit of any one of the above embodiments, and thus has the beneficial effects of any one of the above embodiments, which will not be described in detail here.

[0268] The air conditioner also includes an outdoor unit, and the outdoor unit is connected to the indoor unit through a refrigerant pipe to form a refrigerant circulation loop. Optionally, the indoor unit can be a duct unit or other forms of air conditioners.

[0269] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An indoor unit, characterized in that: include: The shell includes an air duct member and two side plates, the two side plates are arranged at opposite ends of the air duct member, the outer wall surface of the bottom wall of the air duct member and the side plates form a pipe running space, the side plates are provided with pipe outlets, and the two ends of the pipe running space are respectively connected to the two pipe outlets; The pipeline assembly is located in the pipeline space, and the pipeline assembly can extend to the outside of the pipeline space through any one of the two pipe outlets; Wherein, the pipeline assembly is arranged adjacent to the bottom wall of the air duct member.

2. The indoor unit according to claim 1, characterized in that: The bottom wall of the air duct member protrudes into the air duct to form a groove, and the pipeline assembly is located in the groove; and / or, The outer wall surface of the bottom wall of the air duct component is configured with a clamping component, and the clamping component is configured with a clamping groove, and the clamping groove is clamped with the outer wall surface of the pipeline component.

3. The indoor unit according to claim 1, characterized in that: The air duct includes a fan chamber, a pressure diffusion chamber and a heat exchange chamber which are sequentially connected along the air flow direction, and the indoor unit also includes: A crossflow fan is located in the fan cavity; A heat exchanger is located in the heat exchange cavity; Wherein, the pipe space is located between the fan cavity and the diffuser cavity; and / or, An air inlet is provided on the bottom wall of the shell, and at least the pipe space corresponds to the air inlet.

4. The indoor unit according to claim 3, characterized in that: The piping assembly includes: A first pipeline, one end of which is connected to the heat exchanger; A second pipeline, one end of which is connected to the other end of the first pipeline, and at least a portion of the second pipeline is located in the pipeline space; The conversion joint is connected between the other end of the first pipeline and one end of the second pipeline, and is used to adjust the angle between the first pipeline and the second pipeline so that the second pipeline can extend to the outside of the pipe space through any one of the two outlets.

5. The indoor unit according to claim 4, characterized in that: The side plate and the end of the heat exchanger in the length direction enclose an installation space; At least part of the first pipeline is located in the installation space, and the first pipeline extends along the width direction of the indoor unit, and the second pipeline extends along the length direction of the indoor unit.

6. The indoor unit according to claim 5, characterized in that: It also includes a water receiving pan, which is located below the heat exchanger; Wherein, both left and right ends of the water receiving tray are provided with drainage ports, and the drainage ports are suitable for being connected to the first drainage pipe; or, the indoor unit further includes: a water pump, connected to the water receiving pan; The piping assembly also includes: A second drainage pipe is connected to the water outlet of the water pump; Wherein, at least a portion of the second drain pipe can be located in the pipe routing space, and the second drain pipe can extend to the outside of the pipe routing space through any one of the two pipe outlets.

7. The indoor unit according to claim 6, characterized in that: When the indoor unit includes a water pump, The water pump is arranged on a side of the side plate away from the installation space, or the water pump is located in the installation space and on one side in the length direction of the heat exchanger.

8. The indoor unit according to claim 6, characterized in that: The drip tray includes: Base plate; The side edge is connected to the side of the bottom plate facing the pipe space and extends along the height direction of the indoor unit; A pipe outlet is provided on the side, and the first pipeline passes through the pipe outlet and extends into the pipe outlet space.

9. The indoor unit according to any one of claims 3 to 8, characterized in that: Also includes: An electric control box is arranged on one side of the crossflow fan in the length direction; and / or, The axial length of the heat exchanger is greater than the axial length of the impeller of the crossflow fan.

10. An air conditioner, characterized in that: The indoor unit comprises the indoor unit as claimed in any one of claims 1 to 9.

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