Indoor unit of air conditioner

Abstract

According to the air conditioner indoor unit, an indoor air inlet is formed in the front side of a machine shell, and an indoor air outlet is formed in the bottom of the machine shell; the indoor heat exchanger is located on the front side of the centrifugal fan and located on the rear side of the indoor air inlet. The indoor heat exchanger comprises at least three sections of sectional heat exchangers which are sequentially arranged in the height direction of the main body; in the height direction of the main body, the top end of one sectional heat exchanger is located in front of the bottom end of the sectional heat exchanger, the top end of the other sectional heat exchanger is located behind the bottom end of the sectional heat exchanger, and the top end of one sectional heat exchanger is connected with the bottom end of the other sectional heat exchanger; the included angle between the width directions of every two adjacent sectional heat exchangers is a tenth included angle alpha 10, and alpha 10 is larger than or equal to 30 degrees. The heat exchange area of the indoor heat exchanger can be greatly increased under the existing main body height size and front-back size, the heat exchange performance of the indoor heat exchanger is improved, and the condensation problem is reduced.

Description

Technical Field

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

[0002] In small space scenarios such as kitchens, bathrooms, small bedrooms, storage rooms, convenience stores, etc., the indoor wall space is very limited. For example, there are range hoods, cabinets, windows, doors connecting to the living room, refrigerators placed, etc. around the walls of the kitchen. There is a ceiling at the top of the wall. If an air conditioner is to be installed, this small space scenario will limit the size of the air conditioner as well as the air intake and outlet.

[0003] A conventional wall-mounted air conditioner indoor unit includes a casing. An air inlet and an air outlet are arranged on the casing. An indoor heat exchanger is arranged inside the casing. The air inlet is arranged at the top of the casing, and the air outlet is arranged at the front lower part of the casing. When the air conditioner indoor unit works, air enters the casing from the indoor air inlet and then flows out from the indoor air outlet. This requires a certain height of air intake space to be left at the top of the casing. However, in the kitchen scenario, since there is a ceiling at the top of the kitchen and the height space of the kitchen is insufficient, it is required that the wall-mounted air conditioner indoor unit can be installed close to the ceiling to save space. However, after the conventional wall-mounted unit is installed close to the ceiling, the air inlet of the wall-mounted air conditioner indoor unit will be blocked and air cannot enter.

[0004] In order to solve the problem that the air inlet cannot intake air due to being blocked, a forward air intake and bottom air outlet type air conditioner indoor unit is provided, that is, the air inlet is arranged at the front and the air outlet is arranged at the bottom, and the indoor fan is a centrifugal fan. However, the forward air intake and bottom air outlet type air conditioner indoor unit arranges the indoor heat exchanger in one section and the indoor heat exchanger is arranged vertically, which will result in a limited heat exchange area. In order to increase the heat exchange area, only the height of the indoor heat exchanger can be increased, which is not suitable for installation in small spaces such as kitchens, and is not suitable for installation in the space above doors and windows. Therefore, this application proposes an air conditioner indoor unit. Summary of the Invention

[0005] The utility model aims to solve at least one of the technical problems in the related technologies to a certain extent.

[0006] To this end, according to an embodiment of the present disclosure, an air conditioner indoor unit is proposed, including:

[0007] A main body, the direction from its bottom to its top is the height direction of the main body, and the main body at least includes a first cavity located inside the main body;

[0008] The main body includes:

[0009] A casing, an indoor air inlet is arranged on the front side of the casing, an indoor air outlet is arranged at the bottom of the casing, and the indoor air outlet and the indoor air inlet communicate with the first cavity;

[0010] A centrifugal fan, which is disposed in the first chamber and includes a centrifugal fan;

[0011] An indoor heat exchanger, which is disposed in the first chamber; the indoor heat exchanger is located in front of the centrifugal fan and behind the indoor air inlet;

[0012] The indoor heat exchanger includes at least three segmented heat exchangers, and at least three of the segmented heat exchangers are arranged in sequence along the height direction of the main body;

[0013] The top end and the bottom end of the segmented heat exchanger are the two ends in the width direction of the segmented heat exchanger;

[0014] Along the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one of the segmented heat exchangers is located in front of its bottom end, the top end of the other segmented heat exchanger is located behind its bottom end, and the top end of one of the segmented heat exchangers is connected to the bottom end of the other segmented heat exchanger;

[0015] The included angle in the width direction between two adjacent segmented heat exchangers is the tenth included angle α10, and α10≥30°.

[0016] Setting the segmented heat exchanger to have at least three segments, and at least three segmented heat exchangers are arranged in sequence along the height direction of the main body. Along the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one of the segmented heat exchangers is located in front of its bottom end, the top end of the other segmented heat exchanger is located behind its bottom end, and the top end of one of the segmented heat exchangers is connected to the bottom end of the other segmented heat exchanger, so that the indoor heat exchanger is alternately bent back and forth. It can greatly increase the heat exchange area of the indoor heat exchanger and improve the heat exchange performance of the indoor heat exchanger under the existing height dimension and front-back dimension of the main body; and it can make the air passing through the indoor heat exchanger more uniform, improve the heat exchange effect of the indoor heat exchanger, reduce the temperature difference between different refrigerant pipes of the indoor heat exchanger, and greatly reduce the condensation problem.

[0017] According to an embodiment of the present disclosure, a plane perpendicular to the height direction of the main body is defined as the second plane;

[0018] Along the height direction of the main body, a segmented heat exchanger of the indoor heat exchanger close to the top of the main body is the first segmented heat exchanger;

[0019] Along the front-back direction of the main body, the top end of the first segmented heat exchanger is located behind the bottom end of the first segmented heat exchanger; the included angle between the width direction of the first segmented heat exchanger and the second plane is the second included angle α2, and α2≥40°, so that the inclination angle of the first segmented heat exchanger is large enough to enable the condensed water on the first segmented heat exchanger to flow down smoothly and avoid the attenuation effect of the condensed water on the first segmented heat exchanger.

[0020] According to an embodiment of the present disclosure, a plane perpendicular to the height direction of the main body is defined as the second plane;

[0021] Along the height direction of the main body, a section of the segmented heat exchanger of the indoor heat exchanger close to the bottom of the main body is the second-section heat exchanger;

[0022] Along the front-back direction of the main body, the top end of the second-section heat exchanger is in front of the bottom end of the second-section heat exchanger; the included angle between the width direction of the second-section heat exchanger and the second plane is the third included angle α3, 40° ≤ α3 ≤ 70°, such that the inclination angle of the second-section heat exchanger is large enough to enable the condensed water on the second-section heat exchanger to flow down smoothly, avoiding the attenuation effect of the condensed water on the second-section heat exchanger, and avoiding too large a third included angle, which can, when the heat exchanger area is certain, reduce the occupation of the height space of the main body by the second-section heat exchanger, improve the adaptability of the installation environment of the air-conditioning indoor unit, be conducive to installing the air-conditioning indoor unit in small spaces such as kitchens, and be conducive to installing the air-conditioning indoor unit in the upper space of a door body or a window.

[0023] According to an embodiment of the present disclosure, a plane perpendicular to the height direction of the main body is defined as the second plane;

[0024] Along the height direction of the main body, a section of the segmented heat exchanger of the indoor heat exchanger close to the top of the main body is the first-section heat exchanger, a section of the segmented heat exchanger of the indoor heat exchanger close to the bottom of the main body is the second-section heat exchanger, and the segmented heat exchanger between the first-section heat exchanger and the second-section heat exchanger is the middle heat exchanger;

[0025] The included angle between the width directions of two adjacent middle heat exchangers is the tenth included angle α10, 30° ≤ α10 ≤ 80°, such that the included angle between two adjacent segmented heat exchangers is not too small, which can facilitate the passage of air and ensure a certain air intake; and can avoid too large an included angle between two adjacent segmented heat exchangers, which can, when the heat exchange area of two adjacent segmented heat exchangers is certain, reduce the occupation of the height space of the main body by two adjacent segmented heat exchangers, improve the adaptability of the installation environment of the air-conditioning indoor unit, be conducive to installing the air-conditioning indoor unit in small spaces such as kitchens, and be conducive to installing the air-conditioning indoor unit in the upper space of a door body or a window.

[0026] According to an embodiment of the present disclosure, the centrifugal fan includes a centrifugal volute, a volute air inlet is formed on the centrifugal volute, a volute air duct is formed inside the centrifugal volute, the volute air inlet is communicated with the volute air duct, and the centrifugal fan is arranged in the volute air duct;

[0027] The volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan;

[0028] In the height direction of the main body, a section of the segmented heat exchanger of the indoor heat exchanger close to the top of the main body is the first-section heat exchanger, and a section of the segmented heat exchanger of the indoor heat exchanger close to the bottom of the main body is the second-section heat exchanger;

[0029] The minimum distance between the first-section heat exchanger and the volute air inlet is the fourth distance L4, and 8mm ≤ L4 ≤ 30mm;

[0030] The minimum distance between the second-section heat exchanger and the volute air inlet is the fifth distance L5, and 8mm ≤ L5 ≤ 30mm.

[0031] It can prevent the distances between the first-section heat exchanger and the second-section heat exchanger and the volute air inlet from being too small to avoid generating noise, and can also prevent the distances between the first-section heat exchanger and the second-section heat exchanger and the volute air inlet from being too large to avoid reducing the air volume and heat exchange efficiency and avoid causing the size of the main body in the front-back direction to be too large, which is convenient for installing the air-conditioning indoor unit and saves costs.

[0032] According to an embodiment of the present disclosure, a plane passing through the rotation axis of the centrifugal fan and perpendicular to the front-back direction of the main body is defined as the third plane;

[0033] In the height direction of the main body, a section of the segmented heat exchanger of the indoor heat exchanger close to the bottom of the main body is the second-section heat exchanger;

[0034] The second-section heat exchanger is located on the side of the third plane close to the indoor air inlet;

[0035] The minimum distance between the second-section heat exchanger and the third plane is the sixth distance L6, and L6 ≤ 20mm, which can prevent the distance between the second-section heat exchanger and the third plane from being too large, avoid causing the size of the main body in the front-back direction to be too large, be convenient for installing the air-conditioning indoor unit, and save costs.

[0036] According to an embodiment of the present disclosure, the main body includes a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct, and a circumferential wall of the centrifugal air duct;

[0037] The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axis of the centrifugal fan, and the circumferential wall of the centrifugal air duct is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outside of the centrifugal fan;

[0038] The volute air inlet is formed on the first side wall and the second side wall of the centrifugal air duct; the first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the circumferential wall of the centrifugal air duct enclose the centrifugal air duct; the circumferential wall of the centrifugal air duct defines an air outlet of the centrifugal air duct between two ends oppositely arranged along the circumferential direction of the centrifugal fan; the air outlet of the centrifugal air duct and the volute air inlet communicate with the centrifugal air duct; the air outlet of the centrifugal air duct is located at the bottom end of the centrifugal air duct;

[0039] The centrifugal fan includes a centrifugal volute, the volute air inlet is formed on the centrifugal volute, a volute air duct is formed inside the centrifugal volute, the centrifugal air duct includes the volute air duct, and the centrifugal fan is arranged inside the volute air duct;

[0040] The circumferential wall of the centrifugal air duct includes a volute tongue, the air outlet of the centrifugal air duct is located at the bottom end of the volute tongue, and the bottom end of the volute tongue is located at the front end of the air outlet of the centrifugal air duct;

[0041] Along the height direction of the main body, a section of the segmented heat exchanger near the bottom of the main body of the indoor heat exchanger is the second-stage heat exchanger;

[0042] The point on the second-stage heat exchanger closest to the rear end of the main body is the last point of the second-stage heat exchanger;

[0043] In the front-back direction of the main body, the last point of the second-stage heat exchanger is located behind the bottom end of the volute tongue;

[0044] In the front-back direction of the main body, the distance between the last point of the second-stage heat exchanger and the bottom end of the volute tongue is the seventh distance L7, 5mm ≤ L7 ≤ 10mm. This can prevent the second-stage heat exchanger from being too close to the centrifugal fan, avoid noise, make the front-back dimension of the main body smaller, facilitate the installation of the air conditioner indoor unit, and save costs.

[0045] According to an embodiment of the present disclosure, the main body includes a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct and a circumferential wall of the centrifugal air duct;

[0046] The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axis of the centrifugal fan; the circumferential wall of the centrifugal air duct is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outside of the centrifugal fan;

[0047] The volute air inlet is formed on the first side wall and the second side wall of the centrifugal air duct; the first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the circumferential wall of the centrifugal air duct enclose the centrifugal air duct; the circumferential wall of the centrifugal air duct defines an air outlet of the centrifugal air duct between two ends oppositely arranged along the circumferential direction of the centrifugal fan; the air outlet of the centrifugal air duct and the volute air inlet communicate with the centrifugal air duct; the air outlet of the centrifugal air duct is located at the bottom end of the centrifugal air duct;

[0048] The circumferential wall of the centrifugal air duct includes a volute tongue;

[0049] The centrifugal fan includes a centrifugal motor, the centrifugal motor is connected to the centrifugal fan and drives the centrifugal fan to rotate, and the maximum contour formed by the rotation of the points on the centrifugal fan is the outer contour of the centrifugal fan;

[0050] The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the tenth distance L10, 4mm ≤ L10 ≤ 10mm, which can avoid excessive noise caused by too small a distance between the volute tongue and the centrifugal fan, and prevent the distance between the volute tongue and the centrifugal fan from being too large, reducing the air volume loss and ensuring the air volume of the outlet air.

[0051] According to an embodiment of the present disclosure, the centrifugal fan includes:

[0052] A centrifugal volute;

[0053] The centrifugal fan is arranged inside the centrifugal volute;

[0054] A centrifugal motor, connected to the centrifugal fan and driving the centrifugal fan to rotate; when the centrifugal fan rotates, the maximum contour formed by the rotation of the points on the centrifugal fan is the outer contour of the centrifugal fan;

[0055] The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan;

[0056] In the radial direction of the centrifugal fan, the outer contour of the centrifugal fan surrounds the outside of the volute air inlet;

[0057] The distance between the volute air inlet and the outer contour of the centrifugal fan in the radial direction of the centrifugal fan is the eleventh distance L11, 3mm ≤ L11 ≤ 20mm, which can make the centrifugal volute block both ends of the centrifugal fan as much as possible to ensure the air volume.

[0058] According to an embodiment of the present disclosure, an air conditioner indoor unit includes:

[0059] A main body, the direction from the bottom to the top of which is the height direction of the main body, and the main body at least includes a first cavity located inside the main body;

[0060] The main body includes:

[0061] A casing, an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet are communicated with the first cavity;

[0062] A centrifugal fan, arranged in the first cavity and including a centrifugal fan;

[0063] The indoor heat exchanger is disposed in the first chamber; the indoor heat exchanger is located in front of the centrifugal fan and behind the indoor air inlet;

[0064] Define the plane perpendicular to the height direction of the main body as the second plane;

[0065] The indoor heat exchanger includes at least three segmented heat exchangers, and at least three of the segmented heat exchangers are arranged in sequence along the height direction of the main body;

[0066] The top and bottom ends of the segmented heat exchanger are the two ends in the width direction of the segmented heat exchanger;

[0067] Along the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one of the segmented heat exchangers is in front of its bottom end, the top end of the other segmented heat exchanger is behind its bottom end, and the top end of one of the segmented heat exchangers is connected to the bottom end of the other segmented heat exchanger;

[0068] Along the height direction of the main body, the segmented heat exchanger located near the top of the main body of the indoor heat exchanger is the first-stage heat exchanger, the segmented heat exchanger located near the bottom of the main body of the indoor heat exchanger is the second-stage heat exchanger, and the segmented heat exchangers located between the first-stage heat exchanger and the second-stage heat exchanger are intermediate heat exchangers, and there are at least two of the intermediate heat exchangers;

[0069] Along the front-back direction of the main body, the top end of the second-stage heat exchanger is in front of its bottom end, and the top end of the second-stage heat exchanger is in front of its bottom end;

[0070] The included angle in the width direction between two adjacent segmented heat exchangers is the tenth included angle α10, and α10 ≥ 30°. Description of the Drawings

[0071] Figure 1 is a perspective view of an air conditioner indoor unit according to an embodiment of the present application;

[0072] Figure 2 is a perspective view of another angle of the air conditioner indoor unit according to an embodiment of the present application;

[0073] Figure 3 is a partial structural view of the air conditioner indoor unit according to an embodiment of the present application;

[0074] Figure 4 is a cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0075] Figure 5 is another partial structural view of the air conditioner indoor unit according to an embodiment of the present application;

[0076] Figure 6 is a cross-sectional view of an indoor heat exchanger according to an embodiment of the present application;

[0077] Figure 7 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0078] Figure 8 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0079] Figure 9 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0080] Figure 10 is another partial structural view of an air conditioner indoor unit according to an embodiment of the present application;

[0081] Figure 11 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0082] Figure 12 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0083] Figure 13 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0084] Figure 14 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0085] Figure 15 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0086] Figure 16 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0087] Figure 17 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0088] Figure 18 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0089] Figure 19 is another partial cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0090] Figure 20 is another partial cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0091] Figure 21 is another cross-sectional view of an air conditioner indoor unit according to an embodiment of the present application;

[0092] Figure 22 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0093] Figure 23 is a perspective view of the air conditioner indoor unit from another angle according to an embodiment of the present application;

[0094] Figure 24 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0095] Figure 25 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0096] Figure 26 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0097] Figure 27 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application.

[0098] In each of the above figures: the first cavity 101; the housing 1; the indoor air inlet 11; the indoor air outlet 12; the bottom plate 131; the air inlet grille 132; the front panel 133; the first air deflector 134; the second air deflector 135; the indoor heat exchanger 21; the segmented heat exchanger 210; the first end 2111 of the heat exchanger; the second end 2112 of the heat exchanger; the windward surface 2113 of the heat exchanger; the windward surface contour line 21131; the first sub-windward surface contour line 211311; the first section of the heat exchanger 212; the second section of the heat exchanger 213; the third section of the heat exchanger 214; the intermediate heat exchanger 215; the centrifugal fan 22; the centrifugal volute 221; the volute air inlet 2211; the volute air duct 2213; the centrifugal fan 222; the outer contour 2221 of the centrifugal fan; the centrifugal motor 223; the first side plate 2214; the second side plate 2215; the shroud 2216; the inner wall surface 22161 of the shroud; the inner contour line 221611 of the shroud; the first contour line 2216111 of the shroud; the water receiving tray 23; the air inlet housing 34; the air inlet duct 341; the centrifugal duct 410; the first side wall 411 of the centrifugal duct; the second side wall 412 of the centrifugal duct; the circumferential wall 413 of the centrifugal duct; the volute tongue 4131; the volute tongue air inlet section 41311; the volute tongue air outlet section 41312; the first volute tongue air outlet section 413121; the second volute tongue air outlet section 413122; the third volute tongue air outlet section 413123; the volute tongue connection section 41313; the volute tongue contour line 41314; the volute tongue air inlet section contour line 413141; the volute tongue air outlet section contour line 413142; the volute tongue connection section contour line 413143; the centrifugal duct air outlet plate 4132; the first air outlet plate 41321; the second air outlet plate 41322; the centrifugal duct air outlet surface 41323; the centrifugal duct air outlet contour line 413231; the centrifugal duct air outlet 414; the ceiling 903; the first ceiling opening 9031; the second ceiling opening 9032. Detailed Embodiments

[0099] To make the objectives and implementation manners of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application with reference to the accompanying drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0100] It should be noted that the brief description of the terms in this application is only for facilitating the understanding of the subsequent described implementation manners, rather than intending to limit the implementation manners of this application. Unless otherwise specified, these terms should be understood according to their ordinary and common meanings.

[0101] The terms "first", "second", "third", etc. in the description, claims and the above-mentioned accompanying drawings of this application are used to distinguish similar or homogeneous objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms used can be interchanged under appropriate circumstances.

[0102] The terms "comprising" and "having" and any variations thereof are intended to cover but not exclusively include. For example, a product or device comprising a series of components does not necessarily have to be limited to all the clearly listed components, but may include other components not clearly listed or inherent to these products or devices.

[0103] This application provides an indoor air conditioner, which will be described below with reference to the accompanying drawings.

[0104] In this application, the air conditioner may include an indoor air conditioner. The air conditioner may include an outdoor air conditioner. The indoor air conditioner may be installed indoors. The outdoor air conditioner may be installed outdoors. The indoor air conditioner and the outdoor air conditioner may form a split-type air conditioner.

[0105] The indoor air conditioner may be connected to the outdoor air conditioner.

[0106] In this application, the indoor air conditioner may be installed in a small space such as a kitchen. The outdoor air conditioner may be the corresponding outdoor air conditioner for the indoor air conditioner in the small space.

[0107] In this application, the indoor air conditioner may be a wall-mounted indoor air conditioner hung on the wall.

[0108] In this application, the indoor air conditioner may be hung on the cavity wall and may be installed close to the ceiling of the room.

[0109] In this application, the indoor air conditioner may include a main body.

[0110] The main body may have a top and a bottom. The direction from the bottom to the top of the main body may be the height direction of the main body.

[0111] The main body may have a length direction. The length direction of the main body may be from one end of the main body to the other end of the main body.

[0112] The main body may have a front side and a rear side that are oppositely arranged. The side of the main body facing the user may be the front side of the main body. The front-back direction of the main body may be from the front side of the main body to the rear side of the main body.

[0113] The height direction, length direction, and front-back direction of the main body are perpendicular to each other.

[0114] In this application, the air conditioner indoor unit may be vertically arranged. The height direction of the air conditioner indoor unit is parallel to the vertical direction.

[0115] In this application, referring to Figures 1-4 , the main body may at least include a first cavity 101. The first cavity may be located inside the main body.

[0116] In this application, the main body may include a housing 1.

[0117] In this application, referring to Figures 1-4 , an indoor air inlet 11 may be formed on the housing. The indoor air inlet may be an entrance for air to enter the housing. The indoor air inlet may communicate with the first cavity.

[0118] In this application, the indoor air inlet may be located on the front side of the housing.

[0119] In this application, referring to Figures 1-4 , an indoor air outlet 12 may be formed on the housing. The indoor air outlet may be for the air inside the housing to flow out of the housing. The indoor air outlet may communicate with the first cavity.

[0120] In this application, the indoor air outlet may be located at the bottom of the housing.

[0121] In this application, setting the indoor air inlet on the front side of the housing and the indoor air outlet at the bottom of the housing can prevent the air intake and outlet of the air conditioner indoor unit from being affected when the air conditioner indoor unit is hung on the wall and installed against the ceiling, can save indoor space, and enable a wider installation range for the air conditioner indoor unit.

[0122] In this application, referring to Figures 1-4 , the main body may include an indoor heat exchanger 21. The indoor heat exchanger may be arranged in the first cavity. The indoor heat exchanger may be used for heat exchange with the air in the first cavity.

[0123] In this application, the main body may include an indoor fan. The indoor fan may be arranged in the first cavity. The indoor fan may be used to provide power for the flow of air.

[0124] In this application, referring to Figures 1-4, the indoor fan can be a centrifugal fan 22. Setting the indoor fan as a centrifugal fan can enable the air conditioner indoor unit to have strong static pressure capacity, strong wind resistance capacity, and a long air supply distance.

[0125] In the present application, referring to Figures 4-5 , the centrifugal fan 22 can include a centrifugal volute 221.

[0126] In the present application, referring to Figures 4-5 , the centrifugal fan can include a centrifugal fan 222. The centrifugal fan can be disposed inside the centrifugal volute.

[0127] In the present application, referring to Figures 4-5 , the centrifugal fan can include a centrifugal motor 223. The centrifugal motor can be connected to the centrifugal fan. The centrifugal motor can drive the centrifugal fan to rotate.

[0128] In the present application, the indoor heat exchanger can be located on the front side of the centrifugal fan. The indoor heat exchanger can be located on the rear side of the indoor air inlet.

[0129] In the present application, the centrifugal motor drives the centrifugal fan to rotate so that air enters the first chamber from the indoor air inlet to exchange heat with the indoor heat exchanger, and the air after exchanging heat with the indoor heat exchanger flows into the centrifugal volute and then flows out of the centrifugal volute and out of the casing through the indoor air outlet.

[0130] In the present application, a plane perpendicular to the main body length direction is defined as the first plane.

[0131] In the present application, the indoor heat exchanger can be one section. The indoor heat exchanger can have a width direction.

[0132] In the present application, the width direction of the indoor heat exchanger is parallel to the first plane or lies within the first plane.

[0133] Referring to Figures 4-5 , the indoor heat exchanger can include a heat exchanger first end 2111 and a heat exchanger second end 2112 that are oppositely arranged in its width direction.

[0134] In the height direction of the main body, the heat exchanger second end can be located on the side of the heat exchanger first end close to the bottom of the main body.

[0135] Along the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped or zigzag, and the indoor heat exchanger bulges toward the side close to the indoor air inlet.

[0136] In the width direction of the indoor heat exchanger, defining the indoor heat exchanger as an arc or a broken line can increase the heat exchanger area of the indoor heat exchanger under the condition that the main body height dimension is relatively determined, improve the heat exchange effect; on the premise of ensuring the heat exchanger area, the height dimension of the main body can be appropriately reduced, the installation and use range of the air conditioner indoor unit can be improved, the air conditioner indoor unit can be installed in small spaces such as kitchens, and can be installed in places with relatively small heights such as door bodies or windows.

[0137] In this application, a plane perpendicular to the height direction of the main body is defined as the second plane.

[0138] In this application, referring to Figures 4-6 , the indoor heat exchanger includes a heat exchanger windward surface 2113 on the side away from the centrifugal fan.

[0139] The heat exchanger windward surface includes a windward surface contour line 21131 extending in the width direction of the indoor heat exchanger. The length of the windward surface contour line is the first length W1.

[0140] The windward surface contour line includes a first sub-windward surface contour line 211311. The angle between the tangent of the first sub-windward surface contour line and the second plane is the first angle α1.

[0141] In this application, α1 ≥ the first parameter value. The first parameter value can be any value between 40° - 50°. The first parameter value can be 45°. α1 ≥ 45°. This makes the first sub-windward surface contour line inclined enough so that the condensed water on the part of the first sub-windward surface contour line corresponding to the indoor heat exchanger can flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger; the distance of the indoor heat exchanger in the front-back direction of the main body can be reduced, the size in the front-back direction of the main body can be reduced, the installation range of the air conditioner indoor unit can be improved, and the air conditioner indoor unit can be installed in small spaces such as kitchens.

[0142] In this application, the midpoint of the windward surface contour line is located on the first sub-windward surface contour line.

[0143] The length of the contour line between the vertex of the first sub-windward surface contour line and the midpoint of the windward surface contour line is the second length W2. The length of the contour line between the lowest point of the first sub-windward surface contour line and the midpoint of the windward surface contour line is the third length W3.

[0144] In this application, W2 / W1 ≥ the second parameter value. The second parameter value can be any value between 1 / 5 - 3 / 10. The second parameter value can be 1 / 4. W2 / W1 ≥ 1 / 4. This makes the area where the indoor heat exchanger is inclined enough larger, and can ensure the performance of a larger area of the indoor heat exchanger.

[0145] In this application, W2 / W1 ≤ the third parameter value. The third parameter value can be any value between 7 / 20 and 3 / 5. The third parameter value can be 2 / 5. W2 / W1 ≤ 2 / 5. Avoiding an overly large area where the indoor heat exchanger is sufficiently inclined, minimizing the dimension of the main body in the height direction, and improving the installation and usage range of the air conditioner indoor unit.

[0146] In this application, 1 / 4 ≤ W2 / W1 ≤ 2 / 5, making the area where the indoor heat exchanger is sufficiently inclined appropriate, minimizing the dimension of the main body in the height direction, improving the installation and usage range of the air conditioner indoor unit, and ensuring the performance of this part of the indoor heat exchanger.

[0147] In this application, W3 / W1 ≥ the fourth parameter value. The fourth parameter value can be any value between 1 / 5 and 3 / 10. The fourth parameter value can be 1 / 4. W3 / W1 ≥ 1 / 4. Making the area where the indoor heat exchanger is sufficiently inclined larger, and being able to guarantee the performance of a larger area of the indoor heat exchanger.

[0148] In this application, W3 / W1 ≤ the fifth parameter value. The fifth parameter value can be any value between 7 / 20 and 3 / 5. The fifth parameter value can be 2 / 5. W3 / W1 ≤ 2 / 5. Avoiding an overly large area where the indoor heat exchanger is sufficiently inclined, minimizing the dimension of the main body in the height direction, and improving the installation and usage range of the air conditioner indoor unit.

[0149] In this application, 1 / 4 ≤ W3 / W1 ≤ 2 / 5, making the area where the indoor heat exchanger is sufficiently inclined appropriate, minimizing the dimension of the main body in the height direction, improving the installation and usage range of the air conditioner indoor unit, and ensuring the performance of this part of the indoor heat exchanger.

[0150] In this application, when the centrifugal fan rotates, the diameter of the maximum contour formed by the points on the centrifugal fan is the maximum diameter D1 of the centrifugal fan. In the height direction of the main body, the height difference between the rotation axis of the centrifugal fan and the center of the indoor heat exchanger is the first distance L1.

[0151] In this application, referring to Figure 7 , L1 / D1 ≤ the sixth parameter value. The sixth parameter value can be any value between 1 / 3 and 1 / 2. The sixth parameter value can be 1 / 2. L1 / D1 ≤ 1 / 2. It can make the distance between the rotation axis of the centrifugal fan and the center of the indoor heat exchanger in the height direction of the main body smaller, making the centrifugal fan and the indoor heat exchanger as directly opposed as possible, enabling the air passing through the indoor heat exchanger to be more uniform, improving the heat exchange effect of the indoor heat exchanger, and reducing the condensation problem caused by local overcooling or overheating of the indoor heat exchanger.

[0152] In this application, referring to Figure 7 , the minimum distance between the first end of the heat exchanger and the centrifugal volute is the second distance L2.

[0153] In this application, L2 ≤ the seventh parameter value. The seventh parameter value can be any value in the range of 28 mm to 30 mm. The seventh parameter value can be 30 mm. L2 ≤ 30 mm. This can avoid the problem that the overall front-back dimension of the main body is too large due to the excessive distance between the first end of the heat exchanger and the centrifugal volute, improve the applicability of the indoor air conditioner, enable it to be installed in small spaces such as kitchens, and can be installed in the space above a door or a window.

[0154] In this application, L2 ≥ 0 mm, so that the indoor heat exchanger is located in front of the centrifugal fan.

[0155] In this application, referring to Figure 7 , the minimum distance between the second end of the heat exchanger and the centrifugal volute is the third distance L3.

[0156] In this application, L3 ≤ the eighth parameter value. The eighth parameter value can be any value in the range of 28 mm to 30 mm. The eighth parameter value can be 30 mm. L3 ≤ 30 mm. This can avoid the problem that the overall front-back dimension of the main body is too large due to the excessive distance between the second end of the heat exchanger and the centrifugal volute, improve the applicability of the indoor air conditioner, enable it to be installed in small spaces such as kitchens, and can be installed in the space above a door or a window.

[0157] In this application, L3 ≥ 0 mm, so that the indoor heat exchanger is located in front of the centrifugal fan.

[0158] In this application, referring to Figure 8 , the indoor heat exchanger may include a first-section heat exchanger 212. The first-section heat exchanger has a width direction. The top end and the bottom end of the first-section heat exchanger are the two ends in the width direction of the first-section heat exchanger.

[0159] In the front-back direction of the main body, the bottom end of the first-section heat exchanger is in front of the top end of the first-section heat exchanger.

[0160] In this application, the width direction of the first-section heat exchanger is parallel to or lies in the first plane.

[0161] In this application, referring to Figure 8 , the indoor heat exchanger may include a second-section heat exchanger 213. The second-section heat exchanger may have a width direction. The top end and the bottom end of the second-section heat exchanger may be the two ends in the width direction of the second-section heat exchanger.

[0162] In the front-back direction of the main body, the top end of the second-section heat exchanger is in front of the bottom end of the second-section heat exchanger.

[0163] In this application, the width direction of the second-section heat exchanger is parallel to or lies in the first plane.

[0164] In this application, with reference to Figure 8 , the indoor heat exchanger may include a third-stage heat exchanger 214. The third-stage heat exchanger may have a width direction. The top end and the bottom end of the third-stage heat exchanger may be two ends in the width direction of the third-stage heat exchanger.

[0165] In this application, the top end of the third-stage heat exchanger is connected to the bottom end of the first-stage heat exchanger.

[0166] In this application, the bottom end of the third-stage heat exchanger is connected to the top end of the second-stage heat exchanger.

[0167] In this application, the width direction of the third-stage heat exchanger is parallel to or lies within the first plane.

[0168] In this application, the width direction of the first-stage heat exchanger is arranged at an angle with the second plane. The angle between the width direction of the first-stage heat exchanger and the second plane is the second angle α2.

[0169] In this application, α2≥the ninth parameter value. The ninth parameter value may be any value between 35° and 45°. The ninth parameter value may be 40°. α2≥40°. It can reduce the front and back dimensions of the main body while the first-stage heat exchanger has a certain heat exchange area. At the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0170] In this application, with reference to Figure 8 , the width direction of the second-stage heat exchanger is arranged at an angle with the second plane. The angle between the width direction of the second-stage heat exchanger and the second plane is the third angle α3.

[0171] In this application, α3≥the tenth parameter value. The tenth parameter value may be any value in the range of 35° - 45°. The tenth parameter value may be 40°. α3≥40°. It can reduce the front and back dimensions of the main body while the second-stage heat exchanger has a certain heat exchange area; at the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0172] In this application, α3≤the eleventh parameter value. The eleventh parameter value may be any value in the range of 65° - 75°. The eleventh parameter value may be 70°. α3≤70°. It can reduce the height dimension of the main body while the second-stage heat exchanger has a certain heat exchange area, and can be installed in small spaces such as kitchens and can be installed above doors or windows.

[0173] In this application, with reference to Figure 8 , the width direction of the third-stage heat exchanger is arranged at an angle with the second plane. The angle between the width direction of the third-stage heat exchanger and the second plane is the fourth angle α4.

[0174] In this application, α4 ≥ the twelfth parameter value. The twelfth parameter value can be any value in the range of 65° - 75°. The twelfth parameter value can be 70°. α4 ≥ 70°. This can reduce the front - rear dimension of the main body while the third - stage heat exchanger has a certain heat - exchange area; at the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0175] In this application, α4 ≤ the thirteenth parameter value. The thirteenth parameter value can be any value in the range of 105° - 115°. The thirteenth parameter value can be 110°. α4 ≤ 110°. This can reduce the front - rear dimension of the main body while the third - stage heat exchanger has a certain heat - exchange area; at the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0176] In this application, it is set that α2 ≥ 40°, 70° ≤ α4 ≤ 110°, 40° ≤ α3 ≤ 70°. This can, while keeping the height dimension of the main body unchanged, increase the heat - exchange area as much as possible and greatly reduce the front - rear dimension of the main body, reduce costs, make the installation environment of the main body more flexible, and can be installed in small - space areas such as kitchens and can be installed above doors or windows; at the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0177] In this application, referring to Figure 9 , the included angle between the width direction of the first - stage heat exchanger and the width direction of the third - stage heat exchanger is the fifth included angle α5.

[0178] In this application, α5 < the fourteenth parameter value. The fourteenth parameter value can be any value between 160° - 180°. The fourteenth parameter value can be 180°. α5 < 180°. This makes the included angle between the first - stage heat exchanger and the third - stage heat exchanger face the centrifugal fan, and can reduce the dimension of the main body in the front - rear direction, improving the installation application range of the air - conditioner indoor unit.

[0179] In this application, α5 ≥ the fifteenth parameter value. The fifteenth parameter value can be any value between 90° - 110°. The fifteenth parameter value can be 90°. α5 > 90°. This avoids the opening between the width direction of the first - stage heat exchanger and the width direction of the third - stage heat exchanger from being too small, avoiding affecting the amount of air passing through the first - stage heat exchanger and the third - stage heat exchanger, and can reduce the dimension of the main body in the front - rear direction, improving the installation application range of the air - conditioner indoor unit.

[0180] In this application, referring to Figure 9 , the included angle between the width direction of the third - stage heat exchanger and the width direction of the second - stage heat exchanger is the sixth included angle α6.

[0181] In this application, α6 < the sixteenth parameter value. The sixteenth parameter value can be any value between 160° and 180°. The sixteenth parameter value can be 180°. α6 < 180°. This forms an angle between the second heat exchanger and the third heat exchanger facing the centrifugal fan, and can reduce the size of the main body in the front-back direction, improving the installation applicable range of the air-conditioning indoor unit.

[0182] In this application, α6 ≥ the seventeenth parameter value. The seventeenth parameter value can be any value between 90° and 110°. The seventeenth parameter value can be 90°. α6 > 90°. This avoids the openings in the width directions of the second heat exchanger and the third heat exchanger from being too small, preventing the amount of air passing through the second heat exchanger and the third heat exchanger from being affected, and can reduce the size of the main body in the front-back direction, improving the installation applicable range of the air-conditioning indoor unit.

[0183] In this application, 90° < α5 < 180°, 90° < α6 < 180°. This can make the opening of the indoor heat exchanger face the centrifugal fan, avoid the opening of the indoor heat exchanger from being too small, prevent the amount of air passing through the indoor heat exchanger from being affected, and can reduce the size of the main body in the front-back direction, improving the installation applicable range of the air-conditioning indoor unit.

[0184] In this application, it is set that the indoor heat exchanger includes a first heat exchanger, a second heat exchanger and a third heat exchanger, 90° < α5 < 180°, 90° < α6 < 180°. This can increase the heat exchanger area of the indoor heat exchanger under the condition that the height dimension and the front-back dimension of the main body are relatively determined, improving the heat exchange effect; on the premise of ensuring the heat exchanger area, it can appropriately reduce the height dimension and the front-back dimension of the main body, improve the installation and use range of the air-conditioning indoor unit, enable the air-conditioning indoor unit to be installed in small spaces such as kitchens, and can be installed in places with a relatively small height such as door bodies or windows.

[0185] In this application, referring to Figure 10 , the centrifugal fan includes a centrifugal volute 221. A volute air inlet 2211 is formed on the centrifugal volute. A volute air duct 2213 is formed inside the centrifugal volute. The volute air inlet is communicated with the volute air duct. The centrifugal fan is arranged in the volute air duct.

[0186] In this application, the volute air inlet 2211 can be arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0187] In this application, referring to Figure 11 , the minimum distance between the first heat exchanger and the volute air inlet is the fourth distance L4.

[0188] In this application, L4 ≥ the eighteenth parameter value. The eighteenth parameter value can be any value between 6 mm and 10 mm. The eighteenth parameter value can be 8 mm. L4 ≥ 8 mm. This can avoid the distance between the first-stage heat exchanger and the air inlet of the volute from being too small and prevent noise generation.

[0189] In this application, L4 ≤ the nineteenth parameter value. The nineteenth parameter value can be any value between 28 mm and 32 mm. The nineteenth parameter value can be 30 mm. L4 ≤ 30 mm. This can avoid the distance between the first-stage heat exchanger and the air inlet of the volute from being too large, prevent the reduction of air volume and heat transfer efficiency, and avoid the excessive size of the main body in the front-back direction, facilitating the installation of the air conditioner indoor unit and saving costs.

[0190] In this application, 8 mm ≤ L4 ≤ 30 mm. This can avoid the distance between the first-stage heat exchanger and the air inlet of the volute from being too small and prevent noise generation, and can also avoid the distance between the first-stage heat exchanger and the air inlet of the volute from being too large, prevent the reduction of air volume and heat transfer efficiency, avoid the excessive size of the main body in the front-back direction, facilitate the installation of the air conditioner indoor unit and save costs.

[0191] In this application, referring to Figure 11 , the minimum distance between the second-stage heat exchanger and the air inlet of the volute is the fifth distance L5.

[0192] In this application, L5 ≥ the twentieth parameter value. The twentieth parameter value can be any value between 6 mm and 10 mm. The twentieth parameter value can be 8 mm. L5 ≥ 8 mm. This can avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too small and prevent noise generation.

[0193] In this application, L5 ≤ the twenty-first parameter value. The twenty-first parameter value can be any value between 28 mm and 32 mm. The twenty-first parameter value can be 30 mm. L5 ≤ 30 mm. This can avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too large, prevent the reduction of air volume and heat transfer efficiency, and avoid the excessive size of the main body in the front-back direction, facilitating the installation of the air conditioner indoor unit and saving costs.

[0194] In this application, 8 mm ≤ L5 ≤ 30 mm. This can avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too small and prevent noise generation, and can also avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too large, prevent the reduction of air volume and heat transfer efficiency, avoid the excessive size of the main body in the front-back direction, facilitate the installation of the air conditioner indoor unit and save costs.

[0195] In this application, the plane passing through the rotation axis of the centrifugal fan and perpendicular to the front-back direction of the main body is defined as the third plane.

[0196] In the present application, the second-stage heat exchanger is located on one side of the third plane close to the indoor air inlet.

[0197] In the present application, the minimum distance between the second-stage heat exchanger and the third plane is the sixth distance L6.

[0198] In the present application, L6 ≤ the twenty-second parameter value. The twenty-second parameter value can be any value between 18 mm and 22 mm. The twenty-second parameter value can be 20 mm. L6 ≤ 20 mm. This can prevent the distance between the second-stage heat exchanger and the third plane from being too large, avoid excessive dimensions in the front-back direction of the main body, facilitate the installation of the air conditioner indoor unit, and save costs.

[0199] In the present application, the centrifugal fan may include a centrifugal volute 221.

[0200] In the present application, a volute air inlet 2211 may be formed on the centrifugal volute.

[0201] In the present application, the volute air inlet may be provided on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0202] In the present application, a volute air duct may be formed inside the centrifugal volute. The volute air duct may communicate with the volute air inlet. The centrifugal fan may be disposed inside the volute air duct.

[0203] In the present application, the centrifugal volute 221 may include a first side plate 2214. The centrifugal volute 221 may include a second side plate 2215.

[0204] The first side plate and the second side plate may be disposed opposite to each other. The first side plate and the second side plate may be located on both sides of the centrifugal fan in the axial direction.

[0205] In the present application, the volute air inlet may be located on the first side plate and the second side plate.

[0206] In the present application, the centrifugal fan may include a shroud 2216. The shroud may be disposed between the first side plate and the second side plate. The shroud may surround the outside of the centrifugal fan.

[0207] In the present application, the shroud, the first side plate, and the second side plate are connected to enclose the volute air duct.

[0208] In the present application, a centrifugal air duct 410 is formed inside the main body. The centrifugal fan may be disposed inside the centrifugal air duct.

[0209] In the present application, the centrifugal air duct may include a volute air duct 2213. The centrifugal fan may be disposed inside the volute air duct.

[0210] In the present application, a volute air inlet 2211 may be formed on the main body. The volute air inlet may communicate with the centrifugal air duct. The volute air inlet is formed on the centrifugal volute.

[0211] In the present application, a centrifugal air duct outlet 414 may be formed on the main body. The centrifugal air duct outlet 414 may communicate with the centrifugal air duct. The centrifugal air duct outlet 414 may be located at the bottom end of the centrifugal air duct.

[0212] In the present application, referring to Figure 12 , the main body may include a first side wall 411 of the centrifugal air duct. The main body may include a second side wall 412 of the centrifugal air duct. The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct may be located on both sides of the axial direction of the centrifugal fan.

[0213] In the present application, the first side wall of the centrifugal air duct may include a first side plate 2214. The second side wall of the centrifugal air duct may include a second side plate 2215.

[0214] In the present application, a volute air inlet may be formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct.

[0215] In the present application, the main body may include a circumferential wall 413 of the centrifugal air duct. The circumferential wall 413 of the centrifugal air duct may be provided between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct.

[0216] The circumferential wall 413 of the centrifugal air duct may surround the outside of the centrifugal fan.

[0217] In the present application, the circumferential wall 413 of the centrifugal air duct may include an enclosing plate 2216.

[0218] In the present application, the first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the circumferential wall 413 of the centrifugal air duct enclose the centrifugal air duct 410.

[0219] In the present application, a centrifugal air duct outlet is defined between two ends of the circumferential wall of the centrifugal air duct that are oppositely arranged along the circumferential direction of the centrifugal fan.

[0220] In the present application, the centrifugal air duct outlet may be located at the bottom end of the centrifugal air duct.

[0221] In the present application, the circumferential wall 413 of the centrifugal air duct may include a volute tongue 4131. The centrifugal air duct outlet may be located at the bottom end of the volute tongue. The bottom end of the volute tongue may be located at the front end of the centrifugal air duct outlet.

[0222] In the present application, the point on the second-stage heat exchanger closest to the rear end of the main body is the last point of the second-stage heat exchanger.

[0223] In the front-rear direction of the main body, the last point of the second-stage heat exchanger is located behind the bottom end of the volute tongue.

[0224] Referring to Figure 13 , in the front-rear direction of the main body, the distance between the last point of the second-stage heat exchanger and the bottom end of the volute tongue is the seventh distance L7.

[0225] In this application, L7 ≥ the value of the twenty-eighth parameter. The value of the twenty-eighth parameter can be any value between 4 mm and 5 mm. The value of the twenty-eighth parameter can be 5 mm. L7 ≥ 5 mm. This can make the front-to-back dimension of the main body smaller, facilitate the installation of the air conditioner indoor unit, and save costs.

[0226] In this application, L7 ≤ the value of the twenty-ninth parameter. The value of the twenty-ninth parameter can be any value between 8 mm and 12 mm. The value of the twenty-ninth parameter can be 10 mm. L7 ≤ 10 mm. This can prevent the seventh distance from being too large, avoid the second-stage heat exchanger being too close to the centrifugal fan, avoid noise, or avoid the air outlet duct of the centrifugal air duct from being too long.

[0227] In this application, 5 mm ≤ L7 ≤ 10 mm, which can avoid the second-stage heat exchanger being too close to the centrifugal fan, avoid noise, make the front-to-back dimension of the main body smaller, facilitate the installation of the air conditioner indoor unit, and save costs.

[0228] In this application, referring to Figure 14 , the indoor heat exchanger may include a first-stage heat exchanger 212. The first-stage heat exchanger has a width direction. The top end and the bottom end of the first-stage heat exchanger are the two ends in the width direction of the first-stage heat exchanger.

[0229] In this application, the width direction of the first-stage heat exchanger is parallel to or lies within the first plane.

[0230] In this application, in the front-to-back direction of the main body, the bottom end of the first-stage heat exchanger is in front of the top end of the first-stage heat exchanger.

[0231] In this application, referring to Figure 14 , the indoor heat exchanger may include a second-stage heat exchanger 213. The second-stage heat exchanger may have a width direction. The top end and the bottom end of the second-stage heat exchanger may be the two ends in the width direction of the second-stage heat exchanger.

[0232] In this application, the width direction of the second-stage heat exchanger is parallel to or lies within the first plane.

[0233] In this application, in the front-to-back direction of the main body, the top end of the second-stage heat exchanger is in front of the bottom end of the second-stage heat exchanger. The top end of the second-stage heat exchanger is connected to the bottom end of the first-stage heat exchanger.

[0234] In this application, referring to Figure 14 , the included angle between the width direction of the first-stage heat exchanger and the second plane is the second included angle α2.

[0235] In this application, α2 < the value of the twenty-third parameter. The value of the twenty-third parameter can be any value within 30° - 45°. The value of the twenty-third parameter can be 45°. α2 < 45°. It can increase the heat exchange area of the indoor heat exchanger while reducing the height dimension of the main body, and can be installed within a small space such as a kitchen, and can be installed above a door or a window.

[0236] In this application, referring to Figure 14 , the included angle between the width direction of the second-stage heat exchanger and the second plane is the third included angle α3.

[0237] In this application, α3 < the value of the twenty-fourth parameter. The value of the twenty-fourth parameter can be any value within 30° - 45°. The value of the twenty-fourth parameter can be 45°. α3 < 45°. It can increase the heat exchange area of the indoor heat exchanger while reducing the height dimension of the main body, and can be installed within a small space such as a kitchen, and can be installed above a door or a window.

[0238] In this application, α3 < 45° and α2 < 45°. It can increase the heat exchange area of the indoor heat exchanger while reducing the height dimension of the main body, and can be installed within a small space such as a kitchen, and can be installed above a door or a window.

[0239] In this application, referring to Figure 14 , the minimum distance between the first-stage heat exchanger and the air inlet of the volute is the fourth distance L4.

[0240] In this application, L4 ≥ the value of the eighteenth parameter. The value of the eighteenth parameter can be any value between 6 mm - 10 mm. The value of the eighteenth parameter can be 8 mm. L4 ≥ 8 mm. It can avoid the distance between the first-stage heat exchanger and the air inlet of the volute being too small and avoid generating noise.

[0241] In this application, L4 ≤ the value of the nineteenth parameter. The value of the nineteenth parameter can be any value between 28 mm - 32 mm. The value of the nineteenth parameter can be 30 mm. L4 ≤ 30 mm. It can avoid the distance between the first-stage heat exchanger and the air inlet of the volute being too large, avoid reducing the air volume and heat exchange efficiency, and avoid causing the dimension of the main body in the front-rear direction to be too large, which is convenient for installing the air conditioner indoor unit and saves costs.

[0242] In this application, 8 mm ≤ L4 ≤ 30 mm. It can avoid the distance between the first-stage heat exchanger and the air inlet of the volute being too small and avoid generating noise, and can also avoid the distance between the first-stage heat exchanger and the air inlet of the volute being too large, avoid reducing the air volume and heat exchange efficiency, avoid causing the dimension of the main body in the front-rear direction to be too large, which is convenient for installing the air conditioner indoor unit and saves costs.

[0243] In this application, referring to Figure 14, the minimum distance between the second-stage heat exchanger and the volute air inlet is the fifth distance L5.

[0244] In the present application, L5 ≥ the twentieth parameter value. The twentieth parameter value can be any value between 6 mm and 10 mm. The twentieth parameter value can be 8 mm. L5 ≥ 8 mm. This can avoid the distance between the second-stage heat exchanger and the volute air inlet from being too small and avoid generating noise.

[0245] In the present application, L5 ≤ the twenty-first parameter value. The twenty-first parameter value can be any value between 28 mm and 32 mm. The twenty-first parameter value can be 30 mm. L5 ≤ 30 mm. This can avoid the distance between the second-stage heat exchanger and the volute air inlet from being too large, avoid reducing the air volume and heat exchange efficiency, and avoid causing the size of the main body in the front-back direction to be too large, facilitating the installation of the air-conditioning indoor unit and saving costs.

[0246] In the present application, 8 mm ≤ L5 ≤ 30 mm, which can avoid the distance between the second-stage heat exchanger and the volute air inlet from being too small and avoid generating noise, and can also avoid the distance between the second-stage heat exchanger and the volute air inlet from being too large, avoid reducing the air volume and heat exchange efficiency, avoid causing the size of the main body in the front-back direction to be too large, facilitate the installation of the air-conditioning indoor unit, and save costs.

[0247] In the present application, referring to Figure 15 , the indoor heat exchanger may include a first-stage heat exchanger 212. The first-stage heat exchanger has a width direction. The top end and the bottom end of the first-stage heat exchanger are the two ends in the width direction of the first-stage heat exchanger.

[0248] In the present application, the width direction of the first-stage heat exchanger is parallel to or lies within the first plane.

[0249] In the present application, referring to Figure 15 , the indoor heat exchanger may include a second-stage heat exchanger 213. The second-stage heat exchanger may have a width direction. The top end and the bottom end of the second-stage heat exchanger may be the two ends in the width direction of the second-stage heat exchanger.

[0250] In the present application, the width direction of the second-stage heat exchanger is parallel to or lies within the first plane.

[0251] In the present application, in the front-back direction of the main body, the top end of the second-stage heat exchanger is in front of the bottom end of the second-stage heat exchanger. The top end of the second-stage heat exchanger is connected to the bottom end of the first-stage heat exchanger.

[0252] In the present application, referring to Figure 15 , the included angle between the width direction of the first-stage heat exchanger and the second plane may be the second included angle α2.

[0253] In this application, the second included angle α2 ≥ the twenty-fifth parameter value. The twenty-fifth numerical value can be any value between 45° and 70°. The twenty-fifth parameter value can be 45°. The second included angle α2 ≥ 45°. This makes the inclination of the first heat exchanger large enough so that the condensed water on the first heat exchanger can flow down quickly, avoiding the attenuation of the performance of the first heat exchanger caused by the condensed water.

[0254] In this application, referring to Figure 15 , the included angle between the width direction of the second heat exchanger and the second plane is the third included angle α3.

[0255] In this application, the third included angle α3 ≥ the twenty-sixth parameter value. The twenty-sixth numerical value can be any value between 45° and 50°. The twenty-sixth parameter value can be 45°. The third included angle α3 ≥ 45°. This makes the inclination of the second heat exchanger large enough so that the condensed water on the second heat exchanger can flow down quickly, avoiding the attenuation of the performance of the second heat exchanger caused by the condensed water.

[0256] In this application, the second included angle α2 ≥ 45° and the third included angle α3 ≥ 45°, making the inclination of the first heat exchanger large enough so that the condensed water on the first heat exchanger can flow down quickly, avoiding the attenuation of the performance of the first heat exchanger caused by the condensed water, making the inclination of the second heat exchanger large enough so that the condensed water on the second heat exchanger can flow down quickly, avoiding the attenuation of the performance of the second heat exchanger caused by the condensed water; and it can increase the heat exchange area of the indoor heat exchanger when the main body height range is certain, improve the heat exchange effect, and can reduce the front and rear dimensions of the main body when the heat exchange area is certain, can improve the applicability of the air conditioner indoor unit, can be installed in small spaces such as kitchens, and can be installed in the space at the top of doors or windows.

[0257] In this application, referring to Figure 15 , the included angle between the width direction of the first heat exchanger and the width direction of the second heat exchanger is the seventh included angle α7. The opening direction of the fourth included angle faces the centrifugal fan.

[0258] In this application, α7 < the twenty-seventh parameter value. The twenty-seventh numerical value can be any value between 150° and 180°. The twenty-seventh parameter value can be 180°. α7 < 180°. This can avoid the top of the second heat exchanger being too close to the indoor air outlet due to the seventh included angle being too large, can reduce the space occupied by the indoor heat exchanger in the front and rear directions of the main body, can reduce the front and rear dimensions of the main body, improve the applicability of the air conditioner indoor unit, and can be installed in small spaces such as kitchens.

[0259] The indoor heat exchanger is provided with a first-stage heat exchanger and a second-stage heat exchanger. α2≥45°, α3≥45°, α7<180°. It can increase the heat exchanger area of the indoor heat exchanger and improve the heat exchange effect under the condition that the main body height dimension is relatively determined. On the premise of ensuring the heat exchanger area, it can appropriately reduce the front and rear dimensions of the main body, improve the installation and use range of the air conditioner indoor unit, enable the air conditioner indoor unit to be installed in small spaces such as kitchens, and can be installed in places with a relatively small height such as door bodies or windows. It makes the inclination of the first-stage heat exchanger and the second-stage heat exchanger large enough, so that the condensed water on the indoor heat exchanger can flow down quickly, avoiding the attenuation of the performance of the indoor heat exchanger caused by the condensed water.

[0260] In the present application, referring to Figure 16 , the indoor heat exchanger has a width direction. The two ends in the width direction of the indoor heat exchanger are the top end and the bottom end of the indoor heat exchanger. The indoor heat exchanger is in one section.

[0261] In the present application, the width direction of the indoor heat exchanger is parallel to or lies within the first plane.

[0262] In the present application, referring to Figure 16 , in the front and rear direction of the main body, the top end of the indoor heat exchanger is in front of the bottom end of the indoor heat exchanger. The included angle between the width direction of the indoor heat exchanger and the second plane is the eighth included angle α8.

[0263] In the present application, α8≥the thirtieth parameter value. The thirtieth parameter value can be any value between 45° and 55°. The thirtieth parameter value can be 45°. α8≥45°. It can avoid the inclination angle of the indoor heat exchanger being too small, make the air conditioner indoor unit have a sufficient inclination angle, facilitate the condensed water on the indoor heat exchanger to flow down, and avoid the attenuation of the performance of the air conditioner indoor unit caused by the condensed water.

[0264] In the present application, the centrifugal fan includes a centrifugal volute. The centrifugal fan is arranged inside the centrifugal volute. A volute air inlet is formed on the centrifugal volute. The volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0265] In the present application, referring to Figure 16 , the minimum distance between the indoor heat exchanger and the volute air inlet is the eighth distance L8.

[0266] In the present application, L8≥the thirty-first parameter value. The thirty-first parameter value can be any value between 6mm and 10mm. The thirtieth parameter value can be 8mm. L8≥8mm. It can avoid the distance between the indoor heat exchanger and the volute air inlet being too small and avoid generating noise.

[0267] In this application, L8 ≤ the value of the thirty-second parameter. The value of the thirty-second parameter can be any value between 28 mm and 32 mm. The value of the thirty-second parameter can be 30 mm. L8 ≤ 30 mm. This can avoid too large a distance between the indoor heat exchanger and the air inlet of the volute, prevent the reduction of air volume and heat exchange efficiency, and avoid too large a size in the front-back direction of the main body, facilitating the installation of the air conditioner indoor unit and saving costs.

[0268] In this application, 8 mm ≤ L8 ≤ 30 mm, which can avoid abnormal noise caused by a relatively short distance between the indoor heat exchanger and the air inlet of the volute, and avoid a relatively large size in the front-back direction of the main body due to a relatively large distance between the indoor heat exchanger and the air inlet of the volute, which affects the installation and application range of the indoor heat exchanger.

[0269] In this application, referring to Figure 16 , a centrifugal fan is arranged in a centrifugal volute. A centrifugal motor is connected to the centrifugal fan. The centrifugal motor drives the centrifugal fan to rotate. When the centrifugal fan rotates, the diameter of the maximum contour formed by the points on the centrifugal fan is the maximum diameter D1 of the centrifugal fan. In the height direction of the main body, the height difference between the rotation axis of the centrifugal fan and the center of the indoor heat exchanger is the first distance L1.

[0270] In this application, L1 / D1 ≤ the value of the fifth parameter. The value of the fifth parameter can be any value between 1 / 3 and 1 / 2. The value of the fifth parameter can be 1 / 2. L1 / D1 ≤ 1 / 2. This can make the distance between the rotation axis of the centrifugal fan and the center of the indoor heat exchanger in the height direction of the main body relatively small, making the centrifugal fan and the indoor heat exchanger as directly opposed as possible, enabling the air passing through the indoor heat exchanger to be more uniform, improving the heat exchange effect of the indoor heat exchanger, and reducing the condensation problem caused by local overcooling or overheating of the indoor heat exchanger.

[0271] In this application, the peripheral wall 413 of the centrifugal air duct may include an air outlet plate 4132 of the centrifugal air duct. The air outlet plate 4132 of the centrifugal air duct may be arranged at an interval from the volute tongue.

[0272] The air outlet plate 4132 of the centrifugal air duct may be located behind the volute tongue. The air outlet of the centrifugal air duct may be formed at the bottom end of the air outlet plate of the centrifugal air duct.

[0273] The bottom end of the volute tongue and the bottom end of the air outlet plate of the centrifugal air duct define an air outlet of the centrifugal air duct located between the volute tongue and the air outlet plate of the centrifugal air duct.

[0274] In this application, the bottom end of the air outlet plate of the centrifugal air duct is located at the rear end of the air outlet of the centrifugal air duct.

[0275] In this application, referring to Figure 17 , the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct may be the ninth distance L9.

[0276] In the present application, the air outlet plate of the centrifugal air duct may include a first point A1. The minimum distance between the first point A1 and the volute tongue is the ninth distance L9.

[0277] The first point A may be located between the top end and the bottom end of the air outlet plate of the centrifugal air duct.

[0278] In the present application, when the centrifugal fan rotates, the diameter of the maximum contour formed by the rotation of the points on the centrifugal fan is the maximum diameter D1 of the centrifugal fan.

[0279] In the present application, L9 / D1 ≥ the thirty-third parameter value. The thirty-third parameter value may be any value between 1 / 4 and 3 / 8. The thirty-third parameter value may be 1 / 3. L9 / D1 ≥ 1 / 3. This can ensure that the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct is not too small relative to the maximum diameter of the centrifugal fan, and can guarantee the air volume output of the centrifugal fan.

[0280] In the present application, L9 / D1 ≤ the thirty-fourth parameter value. The thirty-fourth parameter value may be any value between 5 / 12 and 2 / 3. The thirty-fourth parameter value may be 1 / 2. L9 / D1 ≤ 1 / 2. This can ensure that the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct is not too large relative to the maximum diameter of the centrifugal fan, and can guarantee the air outlet pressure of the centrifugal fan.

[0281] In the present application, 1 / 3 ≤ L9 / D1 ≤ 1 / 2, which can prevent the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct from being too large or too small relative to the maximum diameter of the centrifugal fan, and can guarantee the air volume output and air outlet pressure of the centrifugal fan.

[0282] In the present application, the peripheral wall of the centrifugal air duct includes a volute tongue 4131.

[0283] In the present application, the centrifugal fan includes a centrifugal motor. The centrifugal motor is connected to the centrifugal fan. The centrifugal motor drives the centrifugal fan to rotate. The maximum contour formed by the rotation of the points on the centrifugal fan is the outer contour of the centrifugal fan.

[0284] The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the tenth distance L10.

[0285] In the present application, L10 ≥ the thirty-fifth parameter value. The thirty-fifth parameter value may be any value between 3 mm and 5 mm. The thirty-fifth parameter value may be 4 mm. This can prevent the distance between the volute tongue and the centrifugal fan from being too small and generating noise.

[0286] In the present application, L10 ≤ the thirty-sixth parameter value. The thirty-sixth parameter value may be any value between 8 mm and 12 mm. The thirty-sixth parameter value may be 10 mm. This can ensure that the distance between the volute tongue and the centrifugal fan is not too large, can reduce the air volume loss, and guarantee the air volume output.

[0287] In this application, 4 mm ≤ L10 ≤ 10 mm, which can avoid generating noise due to too small a distance between the volute tongue and the centrifugal fan, and prevent the distance between the volute tongue and the centrifugal fan from being too large, thereby reducing the air volume loss and ensuring the air volume of the air outlet.

[0288] In this application, the main body may include a water receiving tray 23. The water receiving tray 23 may be disposed in the first cavity. The water receiving tray may be disposed below the indoor heat exchanger to receive the condensed water flowing down from the indoor heat exchanger.

[0289] In this application, referring to Figure 18 , the volute tongue may include a volute tongue air inlet section 41311. The volute tongue may include a volute tongue air outlet section 41312. The volute tongue may include a volute tongue connection section 41313.

[0290] The volute tongue air outlet section may be located at the bottom end of the volute tongue. The air outlet of the centrifugal air duct may be located at the bottom end of the volute tongue air outlet section.

[0291] The volute tongue connection section may be connected between the volute tongue air inlet section and the volute tongue air outlet section.

[0292] In this application, the centrifugal volute may include a volute tongue air inlet section. The shroud may include a volute tongue air inlet section.

[0293] In this application, the centrifugal volute may include a volute tongue connection section. The shroud may include a volute tongue connection section.

[0294] In this application, the centrifugal volute may include a volute tongue air outlet section. The shroud may include a volute tongue air outlet section.

[0295] In this application, the volute tongue air outlet section may include a first volute tongue air outlet section 413121. The centrifugal volute may include a first volute tongue air outlet section. The shroud may include a first volute tongue air outlet section.

[0296] In this application, the volute tongue air outlet section may include a second volute tongue air outlet section 413122. The second volute tongue air outlet section may be located below the first volute tongue air outlet section.

[0297] In this application, the top end of the second volute tongue air outlet section is connected to the bottom end of the first volute tongue air outlet section.

[0298] In this application, the second volute tongue air outlet section may be formed on the water receiving tray.

[0299] In this application, the second volute tongue air outlet section may be formed on the casing.

[0300] In this application, the volute tongue air outlet section may include a third volute tongue air outlet section 413123. The third volute tongue air outlet section may be located below the second volute tongue air outlet section.

[0301] In the present application, the top end of the third volute tongue air outlet section can be connected to the top end of the second volute tongue air outlet section.

[0302] In the present application, the third volute tongue air outlet section can be formed on the housing.

[0303] In the present application, the circumferential wall of the centrifugal air duct can include the centrifugal air duct air outlet plate 4132.

[0304] In the present application, with reference to Figure 19 , the centrifugal air duct air outlet plate 4132 can include the first air outlet plate 41321.

[0305] In the present application, the centrifugal volute can include the first air outlet plate.

[0306] In the present application, the shroud includes the first air outlet plate.

[0307] In the present application, the centrifugal air duct air outlet plate can include the second air outlet plate 41322. The second air outlet plate can be located below the first air outlet plate.

[0308] In the present application, the top end of the second air outlet plate can be connected to the bottom end of the first air outlet plate.

[0309] In the present application, the second air outlet plate can be formed on the housing.

[0310] In the present application, the centrifugal air duct air outlet plate can include the centrifugal air duct air outlet surface 41323. The centrifugal air duct air outlet surface has a centrifugal air duct air outlet contour line 413231. The centrifugal air duct air outlet contour line is located in or parallel to the first plane.

[0311] In the present application, with reference to Figure 20 , the bottom end of the centrifugal air duct air outlet contour line is the front end of the centrifugal air duct air outlet contour line. The included angle between the centrifugal air duct air outlet contour line and the second plane is the ninth included angle α9.

[0312] In the present application, α9 ≥ the thirty-seventh parameter value. The thirty-seventh parameter value can be any value in the range of 25° - 35°. The thirty-seventh parameter value can be 30°. α9 ≥ 30°. This enables air to be guided forward and downward, preventing the ninth angle from being too small and resulting in poor downward air guiding effect.

[0313] In the present application, the centrifugal fan includes a centrifugal volute. A volute air inlet is formed on the centrifugal volute. The centrifugal fan is disposed inside the centrifugal volute. The centrifugal motor is connected to the centrifugal fan and drives the centrifugal fan to rotate. When the centrifugal fan rotates, the maximum contour formed by the rotation of the points on the centrifugal fan is the centrifugal fan outer contour 2221.

[0314] The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0315] In the radial direction of the centrifugal fan, the outer contour of the centrifugal fan surrounds the outside of the air inlet of the volute.

[0316] Reference Figure 21 , the distance between the air inlet of the volute and the outer contour of the centrifugal fan in the radial direction of the centrifugal fan is the eleventh distance L11.

[0317] In this application, L11 ≥ the thirty-eighth parameter value. The thirty-eighth parameter value can be any value in the range of 2 mm - 4 mm. The thirty-eighth parameter value can be 3 mm. L11 ≥ 3 mm. This can improve the air intake efficiency and avoid air return.

[0318] In this application, L11 ≤ the thirty-ninth parameter value. The thirty-ninth parameter value can be any value in the range of 18 mm - 22 mm. The thirty-ninth parameter value can be 20 mm. This can make the centrifugal volute block the two ends of the centrifugal fan as much as possible to ensure the air volume.

[0319] In this application, 3 mm ≤ L11 ≤ 20 mm, which can improve the air intake efficiency, avoid air return, and can make the centrifugal volute block the two ends of the centrifugal fan as much as possible to ensure the air volume.

[0320] In this application, the rotation axis of the centrifugal fan can be perpendicular to the first plane.

[0321] In this application, the shroud has a shroud inner wall surface 22161. The shroud inner wall surface has a shroud inner contour line 221611. The shroud inner contour line 221611 is parallel to or lies in the first plane.

[0322] In this application, the inner surface of the volute tongue includes a volute tongue contour line 41314. The volute tongue contour line is parallel to or lies in the first plane.

[0323] In this application, the volute tongue contour line includes a volute tongue air intake section contour line 413141. The volute tongue air intake section contour line is located at the end of the volute tongue away from the air outlet of the centrifugal air duct.

[0324] In this application, the volute tongue contour line includes a volute tongue connection section contour line 413143.

[0325] In this application, the volute tongue contour line includes a volute tongue air outlet section contour line 413142. The volute tongue air outlet section contour line is located at the end of the volute tongue close to the air outlet of the centrifugal air duct.

[0326] In this application, the volute tongue connection section contour line connects between the volute tongue air intake section contour line and the volute tongue air outlet section contour line.

[0327] In this application, the shroud inner contour line includes the volute tongue air intake section contour line.

[0328] In the present application, the inner contour line of the shroud includes the contour line of the tongue connection section.

[0329] In the present application, referring to Figure 22 , the connection point between the air inlet section contour line of the tongue and the contour line of the tongue connection section is the third point A3.

[0330] In the present application, the inner contour line of the shroud includes the first shroud contour line 2216111 connected to the air inlet section contour line of the tongue.

[0331] In the present application, in the first plane where the inner contour line of the shroud is located, the straight line on which the third point A3 and the rotation center of the centrifugal fan are simultaneously located is the first straight line. The intersection point of the first straight line and the first shroud contour line is the fourth point A4.

[0332] In the present application, in the first plane where the inner contour line of the shroud is located, the straight line perpendicular to the first straight line is the second straight line. The two intersection points of the second straight line and the inner contour line of the shroud are the fifth point A5 and the sixth point A6 respectively.

[0333] Along the extension direction of the inner contour line of the shroud, the fifth point A5 is located between the third point A3 and the fourth point A4.

[0334] In the present application, referring to Figure 22 , in the first plane where the inner contour line of the shroud is located, the maximum contour during the rotation of the centrifugal fan is the first centrifugal fan contour.

[0335] The minimum distance between the third point A3 and the first centrifugal fan contour is the twelfth distance L12.

[0336] The minimum distance between the fourth point A4 and the first centrifugal fan contour is the thirteenth distance L13.

[0337] The minimum distance between the fifth point A5 and the first centrifugal fan contour is the fourteenth distance L14.

[0338] The minimum distance between the sixth point A6 and the first centrifugal fan contour is the fifteenth distance L15.

[0339] L15≥L13. L13≥L14. L14≥L12. This can make the distance between the first centrifugal fan contour and the inner contour line of the shroud gradually increase, and can increase the air pressure in the centrifugal volute.

[0340] L15 / L12≥the fortieth parameter value. The fortieth parameter value can be any value between 4 and 6. The fortieth parameter value can be 4. L15 / L12≥4. This can increase the air pressure in the centrifugal volute and improve the wind resistance of the centrifugal air duct.

[0341] In the present application, referring to Figure 17, the housing may include a front panel 133. The front panel 133 may be provided at the front of the housing.

[0342] In the present application, an indoor air inlet may be formed on the front panel.

[0343] In the present application, a first mounting opening may be formed on the front panel. The first mounting opening may penetrate the bottom plate in the thickness direction of the front panel.

[0344] In the present application, referring to Figure 17 , the housing may include an air inlet grille 132. An indoor air inlet may be formed on the air inlet grille. The air inlet grille may be installed in the first mounting opening.

[0345] In the present application, the main body may include a first filter screen. The first filter screen is used to filter the air entering the first chamber.

[0346] In the present application, the first filter screen may be installed on the housing. The first filter screen may be installed inside the indoor air inlet.

[0347] In the present application, the first filter screen may be installed on the front panel.

[0348] In the present application, the first filter screen may be installed on the air inlet grille.

[0349] In the present application, the main body may include an oil fume filter screen. The oil fume filter screen is used to filter oil fume.

[0350] In the present application, the oil fume filter screen may be provided inside the indoor air inlet.

[0351] In the present application, referring to Figure 17 , the housing may include a bottom plate 131. The bottom plate 131 may be provided at the bottom of the housing. An indoor air outlet may be formed on the bottom plate 131.

[0352] In the present application, referring to Figure 17 , the main body may include a first air deflector 134. The first air deflector is rotatably connected to the housing. The first air deflector can partially open the indoor air outlet.

[0353] Referring to Figure 17 , the main body may include a second air deflector 135. The second air deflector is rotatably connected to the housing. The second air deflector can partially open the indoor air outlet.

[0354] In the height direction of the main body, the first air deflector may be located on the side of the second air deflector closer to the rear of the main body.

[0355] The first air deflector and the second air deflector jointly close the indoor air outlet.

[0356] In the present application, the first air deflector and the second air deflector can be vertically arranged simultaneously so that air is blown downward.

[0357] In the present application, the first air deflector and the second air deflector can be arranged to incline downward so that the wind blows forward and downward, giving a sense of wind to the user.

[0358] In the present application, the first air deflector is rotatably connected to the housing. The first air deflector opens or closes the indoor air outlet.

[0359] In the present application, when the first air deflector closes the indoor air outlet, the second air deflector is located inside the first air deflector.

[0360] In the present application, the air conditioner indoor unit can be an embedded air conditioner indoor unit. The air conditioner indoor unit can be embedded in the ceiling 903.

[0361] In the present application, refer to Figure 23 - With reference to 24, the air conditioner indoor unit can include an air inlet housing 34. The air inlet housing can be at least partially arranged above the ceiling. The air inlet housing can be connected to the housing. The air inlet housing can be located at the indoor air inlet.

[0362] In the present application, refer to Figure 23 - With reference to 24, an air inlet duct 341 can be formed in the air outlet housing. The air inlet duct can communicate with the first cavity.

[0363] In the present application, refer to Figure 23 - With reference to 24, a first ceiling opening 9031 can be provided on the ceiling 903. The air below the ceiling 903 enters the air inlet duct 341 through the first ceiling opening 9031 and then enters the first cavity.

[0364] In the present application, refer to Figure 23 - With reference to 24, a second ceiling opening 9032 can be provided on the ceiling. The air in the first cavity flows to below the ceiling through the indoor air outlet and the second ceiling opening.

[0365] In the present application, refer to Figure 25 , the indoor heat exchanger can include a segmented heat exchanger 210. The segmented heat exchanger 210 can have at least three segments. At least three segments of the segmented heat exchanger can be arranged in sequence along the height direction of the main body.

[0366] The segmented heat exchanger can have a width direction. The width direction of the segmented heat exchanger can be parallel to or located within the first plane.

[0367] The top and bottom ends of the segmented heat exchanger can be the two ends in the width direction of the segmented heat exchanger.

[0368] In the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one segmented heat exchanger is located in front of its bottom end, the top end of the other segmented heat exchanger is located behind its bottom end, and the top end of one segmented heat exchanger is connected to the bottom end of the other segmented heat exchanger.

[0369] Reference Figure 25 , the included angle in the width direction between two adjacent segmented heat exchangers is the tenth included angle α10.

[0370] In this application, α10 ≥ the forty-first parameter value. The forty-first parameter value can be any value between 30° and 40°. The forty-first parameter value can be 30°. α10 ≥ 30°. This makes the included angle between two adjacent segmented heat exchangers not too small, which is conducive to air passing through and ensures a certain air intake volume.

[0371] In this application, it is set that the segmented heat exchanger has at least three segments, and at least three segmented heat exchangers are arranged in sequence in the height direction of the main body. In the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one segmented heat exchanger is located in front of its bottom end, the top end of the other segmented heat exchanger is located behind its bottom end, and the top end of one segmented heat exchanger is connected to the bottom end of the other segmented heat exchanger, so that the indoor heat exchanger is alternately bent back and forth. This can greatly increase the heat exchange area of the indoor heat exchanger under the existing main body height dimension and front-back dimension, and improve the heat exchange performance of the indoor heat exchanger; and it can make the air passing through the indoor heat exchanger more uniform, improve the heat exchange effect of the indoor heat exchanger, reduce the temperature difference between different refrigerant pipes of the indoor heat exchanger, and greatly reduce the condensation problem.

[0372] In this application, reference Figure 26 , in the height direction of the main body, a segmented heat exchanger near the top of the main body of the indoor heat exchanger is the first-stage heat exchanger 212.

[0373] In the front-back direction of the main body, the top end of the first-stage heat exchanger is located behind the bottom end of the first-stage heat exchanger.

[0374] Reference Figure 26 , the included angle between the width direction of the first-stage heat exchanger and the second plane is the second included angle α2.

[0375] In this application, α2 ≥ the forty-second parameter value. The forty-second parameter value can be any value between 30° and 50°. The forty-second parameter value can be 40°. α2 ≥ 40°. This makes the inclination angle of the first-stage heat exchanger large enough to enable the condensed water on the first-stage heat exchanger to flow down smoothly, avoiding the attenuation effect of the condensed water on the first-stage heat exchanger.

[0376] In this application, reference Figure 26, along the height direction of the main body, a section of the segmented heat exchanger of the indoor heat exchanger close to the bottom of the main body is the second-stage heat exchanger 213.

[0377] Reference Figure 26 , along the front-back direction of the main body, the top end of the second-stage heat exchanger is in front of the bottom end of the second-stage heat exchanger. The included angle between the width direction of the second-stage heat exchanger and the second plane is the third included angle α3.

[0378] In this application, α3 ≥ the forty-third parameter value. The forty-third parameter value can be any value between 35° and 45°. The forty-third parameter value can be 40°. α3 ≥ 40°. This makes the inclination angle of the second-stage heat exchanger large enough to enable the condensed water on the second-stage heat exchanger to flow down smoothly, avoiding the attenuation effect of the condensed water on the second-stage heat exchanger.

[0379] In this application, α3 ≤ the forty-fourth parameter value. The forty-fourth parameter value can be any value between 65° and 75°. The forty-fourth parameter value can be 70°. α3 ≤ 70°. Avoiding too large a third included angle can, when the heat exchanger area is certain, reduce the occupation of the height space of the main body by the second-stage heat exchanger, improve the adaptability of the installation environment of the air-conditioning indoor unit, facilitate the installation of the air-conditioning indoor unit in small spaces such as kitchens, and facilitate the installation of the air-conditioning indoor unit in the upper space of doors or windows.

[0380] In this application, 40° ≤ α3 ≤ 70°, which makes the inclination angle of the second-stage heat exchanger large enough to enable the condensed water on the second-stage heat exchanger to flow down smoothly, avoiding the attenuation effect of the condensed water on the second-stage heat exchanger. Avoiding too large a third included angle can, when the heat exchanger area is certain, reduce the occupation of the height space of the main body by the second-stage heat exchanger, improve the adaptability of the installation environment of the air-conditioning indoor unit, facilitate the installation of the air-conditioning indoor unit in small spaces such as kitchens, and facilitate the installation of the air-conditioning indoor unit in the upper space of doors or windows.

[0381] In this application, reference Figure 26 , along the height direction of the main body, a section of the segmented heat exchanger of the indoor heat exchanger close to the top of the main body is the first-stage heat exchanger, a section of the segmented heat exchanger of the indoor heat exchanger close to the bottom of the main body is the second-stage heat exchanger, and the segmented heat exchanger between the first-stage heat exchanger and the second-stage heat exchanger is the intermediate heat exchanger 215.

[0382] The included angle between the width directions of two adjacent intermediate heat exchangers is the tenth included angle α10.

[0383] In this application, α10 ≥ the forty-first parameter value. The forty-first parameter value can be any value between 30° and 40°. The forty-first parameter value can be 30°. α10 ≥ 30°. This ensures that the angle between two adjacent segmented heat exchangers is not too small, facilitating the passage of air and guaranteeing a certain air intake volume.

[0384] In this application, α10 ≤ the forty-fifth parameter value. The forty-fifth parameter value can be any value between 70° and 90°. The forty-fifth parameter value can be 80°. α10 ≤ 80°. This can prevent the angle between two adjacent segmented heat exchangers from being too large. When the heat exchange area of two adjacent segmented heat exchangers is constant, it can reduce the occupation of the main body height space by the two adjacent segmented heat exchangers, improve the adaptability of the installation environment of the air conditioner indoor unit, facilitate the installation of the air conditioner indoor unit in small spaces such as kitchens, and facilitate the installation of the air conditioner indoor unit in the upper space of doors or windows.

[0385] In this application, 30° ≤ α10 ≤ 80°, which ensures that the angle between two adjacent segmented heat exchangers is not too small, facilitating the passage of air and guaranteeing a certain air intake volume; it can prevent the angle between two adjacent segmented heat exchangers from being too large. When the heat exchange area of two adjacent segmented heat exchangers is constant, it can reduce the occupation of the main body height space by the two adjacent segmented heat exchangers, improve the adaptability of the installation environment of the air conditioner indoor unit, facilitate the installation of the air conditioner indoor unit in small spaces such as kitchens, and facilitate the installation of the air conditioner indoor unit in the upper space of doors or windows.

[0386] In this application, α2 ≥ 40°, 40° ≤ α3 ≤ 70°, 30° ≤ α10 ≤ 80°. This can enable the condensed water on the indoor heat exchanger to flow down smoothly from the indoor heat exchanger, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger; it can significantly increase the heat exchange area of the indoor heat exchanger under the existing main body height and front-back dimensions, improving the heat exchange performance of the indoor heat exchanger; it can make the air passing through the indoor heat exchanger more uniform, improving the heat exchange effect of the indoor heat exchanger, reducing the temperature difference between different refrigerant pipes of the indoor heat exchanger, and greatly reducing the condensation problem; and when the heat exchange area is constant, it can reduce the main body height dimension and ensure a certain air intake volume, improving the adaptability of the installation environment of the air conditioner indoor unit, facilitating the installation of the air conditioner indoor unit in small spaces such as kitchens, and facilitating the installation of the air conditioner indoor unit in the upper space of doors or windows.

[0387] In this application, the indoor heat exchanger has four segmented heat exchangers. The indoor heat exchanger includes a first-stage heat exchanger, a second-stage heat exchanger, and an intermediate heat exchanger. The intermediate heat exchanger can have two segments.

[0388] The indoor heat exchanger is provided with four segmented heat exchangers. Compared with the indoor heat exchanger including a first-stage heat exchanger, a second-stage heat exchanger, and a third-stage heat exchanger, the front and rear dimensions of the main body are reduced under the same heat exchange area.

[0389] The indoor heat exchanger is provided with four segmented heat exchangers. Compared with the indoor heat exchanger including a first-stage heat exchanger and a second-stage heat exchanger, the included angle between the width direction of the first-stage heat exchanger and the width direction of the second-stage heat exchanger is less than 90°. Under the same heat exchange area, the front and rear dimensions of the main body are reduced.

[0390] In the present application, the centrifugal fan includes a centrifugal volute. A volute air inlet is formed on the centrifugal volute. A volute air duct is formed inside the centrifugal volute. The volute air inlet is communicated with the volute air duct. The centrifugal fan is arranged inside the volute air duct.

[0391] The volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0392] In the present application, referring to Figure 26 , the minimum distance between the first-stage heat exchanger and the volute air inlet is the fourth distance L4.

[0393] In the present application, L4 ≥ the eighteenth parameter value. The eighteenth parameter value can be any value between 6 mm and 10 mm. The eighteenth parameter value can be 8 mm. L4 ≥ 8 mm. It can avoid the distance between the first-stage heat exchanger and the volute air inlet from being too small and avoid generating noise.

[0394] In the present application, L4 ≤ the nineteenth parameter value. The nineteenth parameter value can be any value between 28 mm and 32 mm. The nineteenth parameter value can be 30 mm. L4 ≤ 30 mm. It can avoid the distance between the first-stage heat exchanger and the volute air inlet from being too large, avoid reducing the air volume and heat exchange efficiency, and avoid causing the dimensions of the main body in the front and rear directions to be too large, which is convenient for installing the air-conditioning indoor unit and saves costs.

[0395] In the present application, 8 mm ≤ L4 ≤ 30 mm. It can avoid the distance between the first-stage heat exchanger and the volute air inlet from being too small and avoid generating noise, and can also avoid the distance between the first-stage heat exchanger and the volute air inlet from being too large, avoid reducing the air volume and heat exchange efficiency, avoid causing the dimensions of the main body in the front and rear directions to be too large, which is convenient for installing the air-conditioning indoor unit and saves costs.

[0396] In the present application, referring to Figure 26 , the minimum distance between the second-stage heat exchanger and the volute air inlet is the fifth distance L5.

[0397] In this application, L5 ≥ the twentieth parameter value. The twentieth parameter value can be any value between 6 mm and 10 mm. The twentieth parameter value can be 8 mm. L5 ≥ 8 mm. This can avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too small, thus avoiding noise generation.

[0398] In this application, L5 ≤ the twenty-first parameter value. The twenty-first parameter value can be any value between 28 mm and 32 mm. The twenty-first parameter value can be 30 mm. L5 ≤ 30 mm. This can avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too large, thus avoiding a reduction in air volume and heat exchange efficiency, and also avoiding the overall dimensions of the main body in the front-back direction from being too large, facilitating the installation of the air conditioner indoor unit and saving costs.

[0399] In this application, 8 mm ≤ L5 ≤ 30 mm. This can avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too small, thus avoiding noise generation, and can also avoid the distance between the second-stage heat exchanger and the air inlet of the volute from being too large, thus avoiding a reduction in air volume and heat exchange efficiency, and avoiding the overall dimensions of the main body in the front-back direction from being too large, facilitating the installation of the air conditioner indoor unit and saving costs.

[0400] In this application, the second-stage heat exchanger is located on the side of the third plane closer to the indoor air inlet.

[0401] In this application, referring to Figure 26 , the minimum distance between the second-stage heat exchanger and the third plane is the sixth distance L6.

[0402] In this application, L6 ≤ the twenty-second parameter value. The twenty-second parameter value can be any value between 18 mm and 22 mm. The twenty-second parameter value can be 20 mm. L6 ≤ 20 mm. This can avoid the distance between the second-stage heat exchanger and the third plane from being too large, thus avoiding the overall dimensions of the main body in the front-back direction from being too large, facilitating the installation of the air conditioner indoor unit and saving costs.

[0403] In this application, the peripheral wall 413 of the centrifugal air duct can include a volute tongue 4131. The air outlet of the centrifugal air duct can be located at the bottom end of the volute tongue. The bottom end of the volute tongue can be located at the front end of the air outlet of the centrifugal air duct.

[0404] In this application, the point on the second-stage heat exchanger closest to the rear end of the main body is the last point of the second-stage heat exchanger.

[0405] In the front-back direction of the main body, the last point of the second-stage heat exchanger is located behind the bottom end of the volute tongue.

[0406] Referring to Figure 26 , in the front-back direction of the main body, the distance between the last point of the second-stage heat exchanger and the bottom end of the volute tongue is the seventh distance L7.

[0407] In this application, L7 ≥ the value of the twenty-eighth parameter. The value of the twenty-eighth parameter can be any value between 4 mm and 5 mm. The value of the twenty-eighth parameter can be 5 mm. L7 ≥ 5 mm. This can make the front-back dimension of the main body smaller, facilitating the installation of the air conditioner indoor unit and saving costs.

[0408] In this application, L7 ≤ the value of the twenty-ninth parameter. The value of the twenty-ninth parameter can be any value between 8 mm and 12 mm. The value of the twenty-ninth parameter can be 10 mm. L7 ≤ 10 mm. This can prevent the seventh distance from being too large, avoid the second-stage heat exchanger being too close to the centrifugal fan, avoid noise, or avoid the air outlet duct of the centrifugal air duct from being too long.

[0409] In this application, 5 mm ≤ L7 ≤ 10 mm, which can avoid the second-stage heat exchanger being too close to the centrifugal fan, avoid noise, make the front-back dimension of the main body smaller, facilitate the installation of the air conditioner indoor unit, and save costs.

[0410] In this application, the indoor heat exchanger includes at least three sections of segmented heat exchangers. The at least three sections of segmented heat exchangers are arranged in sequence along the height direction of the main body.

[0411] The top end and the bottom end of the segmented heat exchanger are the two ends in the width direction of the segmented heat exchanger.

[0412] Along the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one segmented heat exchanger is in front of its bottom end, the top end of the other segmented heat exchanger is behind its bottom end, and the top end of one segmented heat exchanger is connected to the bottom end of the other segmented heat exchanger.

[0413] Along the height direction of the main body, the section of the segmented heat exchanger close to the top of the main body in the indoor heat exchanger is the first-stage heat exchanger, the section of the segmented heat exchanger close to the bottom of the main body is the second-stage heat exchanger, and the segmented heat exchangers between the first-stage heat exchanger and the second-stage heat exchanger are intermediate heat exchangers, and there are at least two intermediate heat exchangers.

[0414] Along the front-back direction of the main body, the top end of the second-stage heat exchanger is in front of its bottom end, and the top end of the second-stage heat exchanger is in front of its bottom end.

[0415] The included angle in the width direction between two adjacent intermediate heat exchangers is the tenth included angle α10.

[0416] In this application, α10 ≥ the value of the forty-first parameter. The value of the forty-first parameter can be any value between 30° and 40°. The value of the forty-first parameter can be 30°. α10 ≥ 30°. This can prevent the included angle between two adjacent segmented heat exchangers from being too small, facilitate the air to pass through, and ensure a certain air intake volume.

[0417] In this application, refer toFigure 27 The centrifugal fan includes a centrifugal volute. The minimum distance between the rear end of the first-stage heat exchanger and the centrifugal volute is the sixteenth distance L16.

[0418] In this application, L16 ≤ the forty-seventh parameter value. The forty-seventh parameter value is any value between 28 mm and 32 mm. The forty-seventh parameter value can be 30 mm. L16 ≤ 30 mm. This avoids the sixteenth distance being too large, resulting in a larger front-to-back dimension of the main body.

[0419] In this application, the indoor heat exchanger has four segmented heat exchangers. The intermediate heat exchanger can have two segments.

[0420] Reference Figure 27 The rear ends of the two intermediate heat exchangers are connected. The minimum distance between the rear ends of the two intermediate heat exchangers and the centrifugal volute is the seventeenth distance L17.

[0421] In this application, L17 ≤ the forty-eighth parameter value. The forty-eighth parameter value is any value between 28 mm and 32 mm. The forty-eighth parameter value can be 30 mm. L17 ≤ 30 mm. This avoids the seventeenth distance being too large, resulting in a larger front-to-back dimension of the main body.

[0422] In this application, a water receiving cavity is formed in the water receiving tray. A water receiving surface is provided at the bottom of the water receiving cavity. The water receiving surface includes a first water receiving surface provided at its bottom end.

[0423] In this application, reference Figure 27 The vertical distance between the bottom end of the second-stage heat exchanger and the first water receiving surface is the eighteenth distance L18.

[0424] In this application, L18 ≤ the forty-ninth parameter value. The forty-ninth parameter value is any value between 28 mm and 32 mm. The forty-ninth parameter value can be 30 mm. L18 ≤ 30 mm. This avoids the eighteenth distance being too large, resulting in a larger height dimension of the main body.

[0425] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0426] For the sake of convenience in explanation, the above description has been made in connection with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. An air conditioner indoor unit, characterized in that: include: A main body, wherein the height direction of the main body is from the bottom to the top, and the main body at least comprises a first cavity located in the main body; The subject includes: A casing, wherein an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet are in communication with the first cavity; a centrifugal blower, disposed in the first chamber and comprising a centrifugal fan; An indoor heat exchanger is disposed in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and in the rear of the indoor air inlet; The indoor heat exchanger comprises at least three segmented heat exchangers, and the at least three segmented heat exchangers are arranged in sequence along the height direction of the main body; The top end and the bottom end of the segmented heat exchanger are two ends in the width direction of the segmented heat exchanger; Along the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one segmented heat exchanger is located in front of the bottom end thereof, the top end of the other segmented heat exchanger is located behind the bottom end thereof, and the top end of one segmented heat exchanger is connected to the bottom end of the other segmented heat exchanger; The included angle between two adjacent segmented heat exchangers in the width direction is the tenth included angle α10, and α10≥30°.

2. The air conditioner indoor unit according to claim 1, characterized in that: defining a plane perpendicular to the height direction of the main body as a second plane; Along the height direction of the main body, a section of the segmented heat exchanger located at the indoor heat exchanger close to the top of the main body is the first section of the heat exchanger; Along the front-to-back direction of the main body, the top end of the first heat exchanger is located behind the bottom end of the first heat exchanger; the angle between the width direction of the first heat exchanger and the second plane is a second angle α2, α2≥40°.

3. The air conditioner indoor unit according to claim 1, characterized in that: defining a plane perpendicular to the height direction of the main body as a second plane; Along the height direction of the main body, a section of the segmented heat exchanger located at the indoor heat exchanger close to the bottom of the main body is the second section heat exchanger; Along the front-to-back direction of the main body, the top end of the second heat exchanger is located in front of the bottom end of the second heat exchanger; the angle between the width direction of the second heat exchanger and the second plane is a third angle α3, 40°≤α3≤70°.

4. The air conditioner indoor unit according to claim 1, characterized in that: defining a plane perpendicular to the height direction of the main body as a second plane; Along the height direction of the main body, a section of the segmented heat exchanger located near the top of the main body of the indoor heat exchanger is a first section of the heat exchanger, a section of the segmented heat exchanger located near the bottom of the main body of the indoor heat exchanger is a second section of the heat exchanger, and the segmented heat exchanger located between the first section of the heat exchanger and the second section of the heat exchanger is an intermediate heat exchanger; The included angle between two adjacent intermediate heat exchangers in the width direction is a tenth included angle α10, and 30°≤α10≤80°.

5. The air conditioner indoor unit according to claim 1, characterized in that: The centrifugal fan comprises a centrifugal volute, a volute air inlet is formed on the centrifugal volute, a volute air duct is formed in the centrifugal volute, the volute air inlet is connected to the volute air duct, and the centrifugal fan is arranged in the volute air duct; The volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan; Along the height direction of the main body, a section of the segmented heat exchanger located near the top of the main body is a first section of the heat exchanger, and a section of the segmented heat exchanger located near the bottom of the main body is a second section of the heat exchanger; The minimum distance between the first heat exchanger and the volute air inlet is a fourth distance L4, 8mm≤L4≤30mm; The minimum distance between the second-stage heat exchanger and the volute air inlet is a fifth distance L5, 8mm≤L5≤30mm.

6. The air conditioner indoor unit according to claim 1, characterized in that: A plane passing through the rotation axis of the centrifugal fan and perpendicular to the front-to-back direction of the main body is defined as a third plane; Along the height direction of the main body, a section of the segmented heat exchanger located at the indoor heat exchanger close to the bottom of the main body is the second section heat exchanger; The second section heat exchanger is located on a side of the third plane close to the indoor air inlet; The minimum distance between the second-stage heat exchanger and the third plane is a sixth distance L6, where L6≤20 mm.

7. The air conditioner indoor unit according to claim 5, characterized in that: The main body comprises a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct and a peripheral wall of the centrifugal air duct; The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axial direction of the centrifugal fan, and the peripheral wall of the centrifugal air duct is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outer side of the centrifugal fan; The volute air inlet is formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct; the first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the peripheral wall of the centrifugal air duct form a centrifugal air duct; the centrifugal air duct air outlet is defined between two ends of the peripheral wall of the centrifugal air duct that are arranged opposite to each other along the circumference of the centrifugal fan; the centrifugal air duct air outlet and the volute air inlet are connected to the centrifugal air duct; the centrifugal air duct air outlet is located at the bottom end of the centrifugal air duct; The centrifugal fan comprises a centrifugal volute, the volute air inlet is formed on the centrifugal volute, a volute air duct is formed in the centrifugal volute, the centrifugal air duct comprises the volute air duct, and the centrifugal fan is arranged in the volute air duct; The peripheral wall of the centrifugal air duct includes a volute tongue, the air outlet of the centrifugal air duct is located at the bottom end of the volute tongue, and the bottom end of the volute tongue is located at the front end of the air outlet of the centrifugal air duct; Along the height direction of the main body, a section of the segmented heat exchanger located at the indoor heat exchanger close to the bottom of the main body is the second section heat exchanger; The point of the second section heat exchanger closest to the rear end of the main body is the rearmost point of the second section heat exchanger; In the front-to-rear direction of the main body, the rearmost point of the second heat exchanger is located behind the bottom end of the volute tongue; In the front-to-back direction of the main body, the distance between the rearmost point of the second-stage heat exchanger and the bottom end of the volute tongue is a seventh distance L7, 5mm≤L7≤10mm.

8. The air conditioner indoor unit according to claim 5, characterized in that: The main body comprises a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct and a peripheral wall of the centrifugal air duct; The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axial direction of the centrifugal fan; the peripheral wall of the centrifugal air duct is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outer side of the centrifugal fan; The volute air inlet is formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct; the first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the peripheral wall of the centrifugal air duct form a centrifugal air duct; the centrifugal air duct air outlet is defined between two ends of the peripheral wall of the centrifugal air duct that are arranged opposite to each other along the circumference of the centrifugal fan; the centrifugal air duct air outlet and the volute air inlet are connected to the centrifugal air duct; the centrifugal air duct air outlet is located at the bottom end of the centrifugal air duct; The peripheral wall of the centrifugal air duct includes a volute tongue; The centrifugal fan comprises a centrifugal motor, which is connected to the centrifugal fan and drives the centrifugal fan to rotate, and the maximum contour formed by the rotation of points on the centrifugal fan is the outer contour of the centrifugal fan; The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the tenth distance L10, 4mm≤L10≤10mm.

9. The air conditioner indoor unit according to claim 5, characterized in that: The centrifugal fan comprises: Centrifugal volute; The centrifugal fan is arranged in the centrifugal volute; a centrifugal motor connected to the centrifugal fan and driving the centrifugal fan to rotate; when the centrifugal fan rotates, the maximum contour formed by the rotation of points on the centrifugal fan is the outer contour of the centrifugal fan; The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan; In the radial direction of the centrifugal fan, the outer contour of the centrifugal fan surrounds the outer side of the volute air inlet; The distance between the volute air inlet and the outer contour of the centrifugal fan in the radial direction of the centrifugal fan is an eleventh distance L11, 3mm≤L11≤20mm.

10. An air conditioner indoor unit, characterized in that: include: A main body, wherein the height direction of the main body is from the bottom to the top, and the main body at least comprises a first cavity located in the main body; The subject includes: A casing, wherein an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet are in communication with the first cavity; a centrifugal blower, disposed in the first chamber and comprising a centrifugal fan; An indoor heat exchanger is disposed in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and in the rear of the indoor air inlet; defining a plane perpendicular to the height direction of the main body as a second plane; The indoor heat exchanger comprises at least three segmented heat exchangers, and the at least three segmented heat exchangers are arranged in sequence along the height direction of the main body; The top end and the bottom end of the segmented heat exchanger are two ends in the width direction of the segmented heat exchanger; Along the height direction of the main body, among two adjacent segmented heat exchangers, the top end of one segmented heat exchanger is located in front of the bottom end thereof, the top end of the other segmented heat exchanger is located behind the bottom end thereof, and the top end of one segmented heat exchanger is connected to the bottom end of the other segmented heat exchanger; Along the height direction of the main body, a section of the segmented heat exchanger located near the top of the main body of the indoor heat exchanger is a first section of the heat exchanger, a section of the segmented heat exchanger located near the bottom of the main body of the indoor heat exchanger is a second section of the heat exchanger, and the segmented heat exchanger located between the first section of the heat exchanger and the second section of the heat exchanger is an intermediate heat exchanger, and the intermediate heat exchanger has at least two; Along the front-to-back direction of the main body, the top end of the second-stage heat exchanger is located in front of the bottom end of the second-stage heat exchanger, and the top end of the second-stage heat exchanger is located in front of the bottom end of the second-stage heat exchanger; The included angle between two adjacent segmented heat exchangers in the width direction is the tenth included angle α10, and α10≥30°.

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