Indoor unit of air conditioner

Abstract

The utility model provides an indoor unit of an air conditioner, which comprises a casing, an indoor air inlet and an indoor air outlet. A centrifugal fan; the indoor heat exchanger is located on the rear side of the centrifugal fan; a plane perpendicular to the length direction of the main body is defined as a first plane; the indoor heat exchanger is one section; the indoor heat exchanger has a width direction, and the width direction of the indoor heat exchanger is parallel to the first plane or located in the first plane; the indoor heat exchanger comprises a heat exchanger first end and a heat exchanger second end which are oppositely arranged in the width direction; in the height direction of the body, the heat exchanger second end is located on one side of the heat exchanger first end close to the bottom of the body. The indoor heat exchanger is in an arc shape or a broken line shape in the width direction of the indoor heat exchanger. The indoor heat exchanger protrudes towards the side away from the centrifugal fan. The heat exchanger area of the indoor heat exchanger can be increased under the condition that the height size of the body is relatively determined, and the heat exchange effect is improved. And the height of the main body can be properly reduced on the premise of ensuring the area of the heat exchanger.

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, and there is a ceiling at the top of the wall. If an air conditioner is to be installed, such a 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 provided on the casing. An indoor heat exchanger is provided inside the casing. The air inlet is provided at the top of the casing, and the air outlet is provided 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 intake will be impossible.

[0004] In order to solve the problem that the air inlet cannot intake air due to being blocked, a bottom-air-intake and front-air-out air conditioner indoor unit is provided, that is, the air inlet is provided at the bottom and the air outlet is provided at the front, and the indoor fan is a centrifugal fan. However, the bottom-air-intake and front-air-out air conditioner indoor unit sets the indoor heat exchanger as one section and the indoor heat exchanger is vertically arranged, 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 art to some 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 the bottom to the top of the main body 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 provided at the bottom of the casing, and an indoor air outlet is provided on the front side of the casing. The indoor air outlet and the indoor air inlet communicate with the first cavity;

[0010] A centrifugal fan, disposed in the first cavity and including a centrifugal fan;

[0011] An indoor heat exchanger, disposed in the first cavity; the indoor heat exchanger is located behind the centrifugal fan;

[0012] Define the plane perpendicular to the length direction of the main body as the first plane;

[0013] The indoor heat exchanger is a section; the indoor heat exchanger has a width direction, and the width direction of the indoor heat exchanger is parallel to or lies in the first plane; the indoor heat exchanger includes a first heat exchanger end and a second heat exchanger end that are oppositely arranged in its width direction;

[0014] In the height direction of the main body, the second heat exchanger end is located on the side of the first heat exchanger end closer to the bottom of the main body;

[0015] Along the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped or zigzag-shaped; the indoor heat exchanger bulges away from the centrifugal fan.

[0016] Defining the indoor heat exchanger as arc-shaped or zigzag-shaped in the width direction of the indoor heat exchanger can increase the heat exchanger area of the indoor heat exchanger and improve the heat exchange effect when the height dimension of the main body is relatively determined. 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 a relatively small height such as door bodies or windows.

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

[0018] The indoor heat exchanger includes a heat exchanger windward surface on the side away from the centrifugal fan;

[0019] The heat exchanger windward surface includes a windward surface contour line extending along the width direction of the indoor heat exchanger; the length of the windward surface contour line is the fourth length W4;

[0020] The windward surface contour line includes a first windward contour line, and the included angle between the tangent of the first windward contour line and the second plane is the ninth included angle α9, α9≥45°;

[0021] The midpoint of the windward surface contour line is located on the first windward contour line;

[0022] The length of the contour line between the vertex of the first windward contour line and the midpoint of the windward surface contour line is the fifth length W5, and the length of the contour line between the lowest point of the first windward contour line and the midpoint of the windward surface contour line is the sixth length W6, 1 / 4≤W5 / W4≤2 / 5, 1 / 4≤W6 / W4≤2 / 5, which can enable the condensed water at the bottom of the indoor heat exchanger to flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger, and conveniently flow into the water receiving tray to avoid the condensed water from flowing out of the indoor air inlet, and can reduce the size of the water receiving tray in the front-to-back direction, reduce the obstruction of the indoor air inlet by the water receiving tray, and increase the air intake volume; and the size of the main body in the height direction is reduced as much as possible, thereby increasing the installation and use range of the air-conditioning indoor unit.

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

[0024] The subject includes:

[0025] A water receiving tray is arranged below the second end of the heat exchanger to receive condensed water flowing down from the indoor heat exchanger;

[0026] The indoor heat exchanger comprises a heat exchanger windward surface located at a side thereof away from the centrifugal fan; the heat exchanger windward surface comprises a windward surface contour line extending along the width direction of the indoor heat exchanger;

[0027] In the front-to-back direction of the main body, the point on the windward surface contour line that is farthest from the front end of the main body is the last point A2 of the windward surface contour line; in the height direction of the main body, the last point of the windward surface contour line is located between the first end of the heat exchanger and the second end of the heat exchanger;

[0028] The portion of the windward surface contour line that is located behind the water receiving pan and not higher than the last point of the windward surface contour line is the second windward contour line, and the angle between the tangent of the second windward contour line and the second plane is the tenth angle α10, α10≥45°, so that the second windward contour line is sufficiently inclined so that the condensed water in the portion of the second windward contour line corresponding to the indoor heat exchanger can flow down quickly, thereby avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger; reducing the size of the water receiving pan in the front-to-back direction of the main body, reducing the obstruction of the indoor air inlet by the water receiving pan, and increasing the air intake volume; the distance of the indoor heat exchanger in the front-to-back direction of the main body can be reduced, the size of the main body in the front-to-back direction can be reduced, and the installation range of the air-conditioning indoor unit can be increased, so that the air-conditioning indoor unit can be installed in small spaces such as kitchens.

[0029] According to an embodiment of the present disclosure, the centrifugal fan comprises:

[0030] Centrifugal volute;

[0031] A centrifugal fan is arranged in the centrifugal volute;

[0032] A centrifugal motor, connected to the centrifugal fan and driving the centrifugal fan to rotate;

[0033] When the centrifugal fan rotates, the maximum diameter of the contour formed by the rotation of the points on the centrifugal fan is the maximum diameter D1 of the 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, and L1 / D1≤1 / 2, which 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, so that the centrifugal fan and the indoor heat exchanger are arranged as directly opposite as possible, which can make the air passing through the indoor heat exchanger more uniform, improve the heat exchange effect of the indoor heat exchanger, and reduce the condensation problem caused by local overcooling or overheating of the indoor heat exchanger.

[0034] According to an embodiment of the present disclosure, the indoor heat exchanger includes a heat exchanger backwind surface, and the heat exchanger backwind surface is located on the side of the indoor heat exchanger close to the centrifugal fan; the centrifugal fan includes a centrifugal volute;

[0035] The minimum distance between the top end of the heat exchanger backwind surface and the centrifugal volute is the seventeenth distance L17, and L17≤30mm, which can avoid the problem that the distance between the top end of the heat exchanger backwind surface and the centrifugal volute is too large, resulting in too large front and back dimensions of the main body and affecting the installation and application range of the air conditioner indoor unit.

[0036] According to an embodiment of the present disclosure, the indoor heat exchanger includes a heat exchanger backwind surface, and the heat exchanger backwind surface is located on the side of the indoor heat exchanger close to the centrifugal fan; the centrifugal fan includes a centrifugal volute;

[0037] The minimum distance between the bottom end of the heat exchanger backwind surface and the centrifugal volute is the eighteenth distance L18, and L18≤30mm, which can avoid the problem that the distance between the top end of the heat exchanger backwind surface and the centrifugal volute is too large, resulting in too large front and back dimensions of the main body and affecting the installation and application range of the air conditioner indoor unit.

[0038] According to an embodiment of the present disclosure, an air conditioner indoor unit is further provided, including:

[0039] 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;

[0040] The main body includes:

[0041] A casing, with an indoor air inlet provided at its bottom, and an indoor air outlet provided at the front side of the casing, and the indoor air outlet and the indoor air inlet are communicated with the first cavity;

[0042] A centrifugal fan, arranged in the first cavity and including a centrifugal fan and a centrifugal volute;

[0043] An indoor heat exchanger, disposed in the first cavity; the indoor heat exchanger is located behind the centrifugal fan;

[0044] Define the plane perpendicular to the height direction of the main body as the second plane;

[0045] 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 a section;

[0046] The included angle between the width direction of the indoor heat exchanger and the second plane is the fifth included angle α5, 45° ≤ α5 ≤ 145°;

[0047] The minimum distance between the indoor heat exchanger and the centrifugal volute is the nineteenth distance L19, L19 ≥ 5 mm.

[0048] 45° ≤ α5 ≤ 145°, making the inclination degree of the indoor heat exchanger relatively large, which is beneficial to the condensation water on the indoor heat exchanger to flow down, reducing the influence of the condensation water on the performance attenuation of the indoor heat exchanger; it is convenient to flow into the water receiving tray, avoiding the condensation water from flowing out of the indoor air inlet, and can reduce the size of the water receiving tray in the front-back direction, reduce the shielding of the water receiving tray on the indoor air inlet, and increase the air inlet volume; and can increase the heat exchanger area of the indoor heat exchanger under the condition that the height dimension of the main body is relatively determined, improving the heat exchange effect. On the premise of ensuring the heat exchanger area, the height dimension of the main body can be appropriately reduced, which can 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 relatively small heights such as door bodies or windows; L19 ≥ 5 mm, avoiding noise caused by the indoor heat exchanger being too close to the centrifugal volute.

[0049] According to an embodiment of the present disclosure, the centrifugal fan includes:

[0050] A centrifugal volute, on which a volute air inlet is formed;

[0051] A centrifugal fan, disposed in the centrifugal volute;

[0052] 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 points on the centrifugal fan is the centrifugal fan outer contour;

[0053] The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan;

[0054] In the radial direction of the centrifugal fan, the centrifugal fan outer contour surrounds the outside of the volute air inlet;

[0055] 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 twentieth distance L20, where 3 mm ≤ L20 ≤ 20 mm. This can improve the air intake efficiency, avoid air return, and minimize the blockage of the centrifugal volute to the centrifugal fan, ensuring the air volume.

[0056] According to an embodiment of the present disclosure, the centrifugal fan includes:

[0057] A centrifugal volute, on which a volute air outlet is formed and inside which a volute air duct is formed, and the volute air duct is communicated with the volute air outlet;

[0058] A centrifugal fan, disposed inside the volute air duct;

[0059] A centrifugal motor, connected to the centrifugal fan and driving the centrifugal fan to rotate;

[0060] The centrifugal volute includes a first side plate, a second side plate and a surrounding plate. The first side plate and the second side plate are oppositely arranged and are respectively disposed on both sides of the axial direction of the centrifugal fan. The surrounding plate is disposed between the first side plate and the second side plate and surrounds the outside of the centrifugal fan;

[0061] The surrounding plate, the first side plate and the second side plate are connected to enclose the volute air duct and the volute air outlet;

[0062] The surrounding plate includes a volute tongue and a first air outlet plate. The first air outlet plate is located above the volute tongue and is spaced from the volute tongue. The volute air outlet is formed at the front ends of the volute tongue and the first air outlet plate;

[0063] The minimum distance between the volute tongue and the first air outlet plate is the fifth distance L5. The first air outlet plate includes a first point A, and the minimum distance between the first point A and the volute tongue is the fifth distance. The first point A is located between the front end and the rear end of the first air outlet plate;

[0064] 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, where 1 / 3 ≤ L5 / D1 ≤ 1 / 2. This can prevent the minimum distance between the volute tongue and the first air outlet plate from being too large or too small relative to the maximum diameter of the centrifugal fan, and can ensure the air outlet volume and air outlet pressure of the centrifugal fan.

[0065] According to an embodiment of the present disclosure, the centrifugal fan includes:

[0066] A centrifugal volute, including a volute tongue;

[0067] A centrifugal fan, disposed inside the centrifugal volute;

[0068] A centrifugal motor is connected to the centrifugal fan and drives the centrifugal fan to rotate. The maximum contour formed by the rotation of points on the centrifugal fan is the outer contour of the centrifugal fan.

[0069] The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the eighth spacing L8, where 4 mm ≤ L8 ≤ 10 mm. This avoids excessive noise caused by too small a distance between the volute tongue and the centrifugal fan and ensures that the distance between the volute tongue and the centrifugal fan is not too large, reducing air volume loss and guaranteeing the air volume of the air outlet. Description of the Drawings

[0070] Figure 1 is a perspective view of an air conditioner indoor unit according to an embodiment of the present application;

[0071] Figure 2 is a perspective view of the air conditioner indoor unit from another perspective according to an embodiment of the present application;

[0072] Figure 3 is a partial structural view of the air conditioner indoor unit according to an embodiment of the present application;

[0073] Figure 4 is a sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0074] Figure 5 is another partial structural view of the air conditioner indoor unit according to an embodiment of the present application;

[0075] Figure 6 is another sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0076] Figure 7 is a sectional view of the indoor heat exchanger according to an embodiment of the present application;

[0077] Figure 8 is another sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0078] Figure 9 is another sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0079] Figure 10 is another partial structural view of the air conditioner indoor unit according to an embodiment of the present application;

[0080] Figure 11 is a partial sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0081] Figure 12 is another sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0082] Figure 13 is another partial sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0083] Figure 14 is a perspective view of another angle of the air conditioner indoor unit according to an embodiment of the present application;

[0084] Figure 15 is a partial structural view of another angle of the air conditioner indoor unit according to an embodiment of the present application;

[0085] Figure 16 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0086] Figure 17 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0087] Figure 18 is another partial cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0088] Figure 19 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0089] Figure 20 is another partial cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0090] Figure 21 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0091] Figure 22 is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application.

[0092] In the above figures: the first cavity 101; the housing 1; the indoor air inlet 11; the first air inlet 111; the second air inlet 112; the indoor air outlet 12; the bottom plate 131; the first installation opening 1311; the air inlet grille 132; the front panel 133; the first air guide plate 134; the second air guide plate 135; the indoor heat exchanger 21; the first end of the heat exchanger 2111; the second end of the heat exchanger 2112; the back wind surface of the heat exchanger 2113; the windward surface of the heat exchanger 2115; the windward surface contour line 21151; the first windward contour line 211511; the second windward contour line 211512; 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 centrifugal fan 22; the centrifugal volute 221; the volute air inlet 2211; the volute air outlet 2212; the volute air duct 2213; the first side plate 2214; the second side plate 2215; the shroud 2216; the volute tongue 22161; the first air outlet plate 22162; the inner contour line of the shroud 22163; the air outlet section of the volute tongue 221631; the air inlet section of the volute tongue 221632; the connecting section of the volute tongue 221633; the first contour line of the shroud 221634; the centrifugal fan 222; the outer contour of the centrifugal fan 2221; the centrifugal motor 223; the water receiving tray 23; the water receiving groove 231; the bottom surface of the water receiving groove 2311; the air outlet housing 34; the air outlet duct 341; the ceiling 903; the first opening of the ceiling 9031; the second opening of the ceiling 9032. Detailed implementation manners

[0093] To make the purpose 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 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 the embodiments.

[0094] It should be noted that the brief description of the terms in this application is only for the convenience of understanding the following described implementation manners, rather than intending to limit the implementation manners of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meanings.

[0095] In this application, the terms "first", "second", "third", etc. in the specification, claims and the above drawings are used to distinguish similar or same-kind 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 can be interchanged under appropriate circumstances.

[0096] The terms "comprising" and "having" and any of their variations 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 that are not clearly listed or are inherent to these products or devices.

[0097] This application proposes an indoor unit of an air conditioner, and the indoor unit of the air conditioner will be described below with reference to the accompanying drawings.

[0098] In this application, the air conditioner may include an indoor unit of the air conditioner. The air conditioner may include an outdoor unit of the air conditioner. The indoor unit of the air conditioner may be installed indoors. The outdoor unit of the air conditioner may be installed outdoors. The indoor unit of the air conditioner and the outdoor unit of the air conditioner may form a split-type air conditioner.

[0099] The indoor unit of the air conditioner may be connected to the outdoor unit of the air conditioner.

[0100] In this application, the indoor unit of the air conditioner may be installed in a small space such as a kitchen. The outdoor unit of the air conditioner may be the outdoor unit corresponding to the indoor unit of the air conditioner in the small space.

[0101] In this application, the indoor unit of the air conditioner may be a wall-mounted indoor unit of the air conditioner hanging on the wall.

[0102] In this application, the indoor unit of the air conditioner may be hung on the cavity wall and may be installed close to the top wall of the room.

[0103] In this application, the indoor unit of the air conditioner may include a main body.

[0104] The main body may have a top and a bottom. The direction from the bottom of the main body to the top of the main body may be the height direction of the main body.

[0105] The main body may have a length direction. The direction from one end of the main body to the other end of the main body may be the length direction of the main body.

[0106] 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 direction from the front side of the main body to the rear side of the main body may be the front-rear direction of the main body.

[0107] The height direction, length direction, and front-rear direction of the main body are perpendicular to each other.

[0108] In this application, the indoor unit of the air conditioner may be vertically arranged. The height direction of the indoor unit of the air conditioner is parallel to the vertical direction.

[0109] 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.

[0110] In this application, referring to Figures 1 - 4 , the main body may include a housing 1.

[0111] 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.

[0112] In the present application, the indoor air inlet can be located at the bottom of the housing.

[0113] In the present application, referring to Figures 1 - 4 , an indoor air outlet 12 can be formed on the housing. The indoor air outlet can be for the air inside the housing to flow out of the housing. The indoor air outlet can communicate with the first chamber.

[0114] In the present application, the indoor air outlet can be located at the front side of the housing.

[0115] Setting the indoor air inlet at the bottom of the housing and the indoor air outlet at the front side of the housing can prevent the air intake and outlet of the indoor unit of the air conditioner from being affected when the indoor unit of the air conditioner is hung on the wall and installed against the ceiling, can save indoor space, and enable a wider installation range for the indoor unit of the air conditioner.

[0116] In the present application, referring to Figures 1 - 4 , the main body can include an indoor heat exchanger 21. The indoor heat exchanger can be arranged in the first chamber. The indoor heat exchanger can be used for heat exchange with the air in the first chamber.

[0117] In the present application, the main body can include an indoor fan. The indoor fan can be arranged in the first chamber. The indoor fan can be used to provide power for the flow of air.

[0118] In the present application, referring to Figures 1 - 4 , the indoor fan can be a centrifugal fan 22.

[0119] In the present application, referring to Figures 4 - 5 , the centrifugal fan 22 can include a centrifugal volute 221. The centrifugal fan can include a centrifugal fan impeller 222. The centrifugal fan impeller can be arranged inside the centrifugal volute. The centrifugal fan can include a centrifugal motor 223. The centrifugal motor can be connected to the centrifugal fan impeller. The centrifugal motor can drive the centrifugal fan impeller to rotate.

[0120] In the present application, referring to Figures 4 - 5 , a volute air inlet 2211 can be formed on the centrifugal volute 221. A volute air outlet 2212 can be formed on the centrifugal volute. A volute air duct 2213 can be formed inside the centrifugal volute 221.

[0121] The volute air duct can communicate with the volute air inlet. The volute air duct can communicate with the volute air outlet.

[0122] In the present application, the volute air outlet can be located at the front end of the volute air duct.

[0123] In the present application, the volute air outlet can be located at the front end of the centrifugal volute.

[0124] In the present application, the volute air inlet can be arranged on both sides of the centrifugal volute in the longitudinal direction of the main body.

[0125] The centrifugal motor drives the centrifugal fan to rotate, so that air enters the volute air duct from the volute air inlet on both sides of the centrifugal volute, and then is blown out from the volute air outlet.

[0126] Setting the indoor fan as a centrifugal fan can make the static pressure capacity of the air conditioner indoor unit strong, the wind resistance capacity strong, and the air supply distance far.

[0127] In this application, the plane perpendicular to the main body length direction is defined as the first plane.

[0128] In this application, the indoor heat exchanger is arranged in the first cavity. The indoor heat exchanger is located at the rear side of the centrifugal fan.

[0129] In this application, the volute air outlet can face the indoor air outlet.

[0130] In this application, the indoor heat exchanger is in one section. The indoor heat exchanger has a width direction. The width direction of the indoor heat exchanger is parallel to or lies in the first plane.

[0131] Reference Figures 4 - 6 , the indoor heat exchanger may include a heat exchanger first end 2111 and a heat exchanger second end 2112 which are oppositely arranged in its width direction. In the height direction of the main body, the heat exchanger second end is located on the side close to the bottom of the main body of the heat exchanger first end.

[0132] Along the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped or zigzag-shaped. The indoor heat exchanger bulges towards the side away from the centrifugal fan.

[0133] Limiting the indoor heat exchanger to be arc-shaped or zigzag-shaped in the width direction of the indoor heat exchanger can increase the heat exchanger area of the indoor heat exchanger and improve the heat exchange effect under the condition that the height dimension of the main body is relatively determined. 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.

[0134] In this application, the plane perpendicular to the height direction of the main body is defined as the second plane.

[0135] In this application, reference Figures 5 - 7 , the indoor heat exchanger includes a heat exchanger windward surface 2115 on the side away from the centrifugal fan.

[0136] Reference Figures 5 - 7 , the heat exchanger windward surface includes a windward surface contour line 21151 extending along the width direction of the indoor heat exchanger. The length of the windward surface contour line is the fourth length W4;

[0137] Reference Figures 5 - 7, the windward profile line includes the first windward profile line 211511. The included angle between the tangent of the first windward profile line and the second plane is the ninth included angle α9.

[0138] In the present application, α9 ≥ the forty-sixth parameter value. The forty-sixth parameter value can be any value between 45° and 55°. The forty-sixth parameter value can be 45°. α9 ≥ 45°. This makes the first windward profile line sufficiently inclined, enabling the condensed water on the part of the first windward profile line corresponding to the indoor heat exchanger to flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger; facilitating the flow to the water receiving tray, preventing the condensed water from flowing out of the indoor air inlet, and being able to reduce the size of the water receiving tray in the front-rear direction of the main body, reducing the blockage of the water receiving tray to the indoor air inlet, and increasing the air intake volume; it can reduce the distance of the indoor heat exchanger in the front-rear direction of the main body, reduce the size of the water receiving tray in the front-rear direction of the main body, reduce the blockage of the water receiving tray to the indoor air inlet, and improve the air intake volume; and reduce the size of the main body in the front-rear direction, expanding the installation range of the air conditioner indoor unit, enabling the air conditioner indoor unit to be installed in small spaces such as kitchens.

[0139] The midpoint of the windward profile line is located on the first windward profile line.

[0140] Reference Figures 5 - 7 , the length of the contour line between the vertex of the first windward profile line and the midpoint of the windward profile line is the fifth length W5. The length of the contour line between the lowest point of the first windward profile line and the midpoint of the windward profile line is the sixth length W6.

[0141] In the present application, W5 / W4 ≥ the forty-seventh parameter value. The forty-seventh parameter value can be any value between 1 / 5 and 3 / 10. The forty-seventh parameter value can be 1 / 4. W5 / W4 ≥ 1 / 4. This makes the area where the indoor heat exchanger is sufficiently inclined larger, which can guarantee the performance of a larger area of the indoor heat exchanger, reduce the size of the water receiving tray in the front-rear direction of the main body, reduce the blockage of the water receiving tray to the indoor air inlet, and increase the air intake volume.

[0142] In the present application, W5 / W4 ≤ the forty-eighth parameter value. The forty-eighth parameter value can be any value between 7 / 20 and 3 / 5. The forty-eighth parameter value can be 2 / 5. W5 / W4 ≤ 2 / 5. This avoids the area where the indoor heat exchanger is overly inclined, minimizing the size of the main body in the height direction and expanding the installation and usage range of the air conditioner indoor unit.

[0143] In the present application, 1 / 4 ≤ W5 / W4 ≤ 2 / 5, which can enable the condensed water on the indoor heat exchanger to flow down quickly, avoid the attenuation effect of the condensed water on the performance of the indoor heat exchanger, and minimize the size of the main body in the height direction, expanding the installation and usage range of the air conditioner indoor unit.

[0144] In the present application, W6 / W4≥49th parameter value. The 49th parameter value may be any value between 1 / 5-3 / 10. The 49th parameter value may be 1 / 4. W6 / W4≥1 / 4. The sufficiently inclined area of ​​the indoor heat exchanger is larger, which can ensure the performance of the indoor heat exchanger in a larger area, reduce the size of the water receiving tray in the front and rear direction of the main body, reduce the shielding of the indoor air inlet by the water receiving tray, and increase the air volume of the air intake.

[0145] In the present application, W6 / W4≤50th parameter value. The 50th parameter value may be any value between 7 / 20-3 / 5. The 50th parameter value may be 2 / 5. W6 / W4≤2 / 5. Avoiding too large an area where the indoor heat exchanger is sufficiently tilted, minimizing the height dimension of the main body, and increasing the installation and use range of the indoor unit of the air conditioner.

[0146] In the present application, 1 / 4≤W6 / W4≤2 / 5, which enables the condensed water on the upper part of the indoor heat exchanger to flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger, and minimizes the height dimension of the main body, thereby increasing the installation and use range of the air conditioner indoor unit.

[0147] In the present application, 1 / 4≤W5 / W4≤2 / 5, 1 / 4≤W6 / W4≤2 / 5, which can enable the condensed water at the bottom of the indoor heat exchanger to flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger, and minimize the height dimension of the main body, thereby increasing the installation and use range of the air conditioner indoor unit.

[0148] In this application, reference is made to Figure 8 The main body may include a water receiving pan 23. The water receiving pan may be arranged below the second end of the heat exchanger to receive condensed water flowing down from the indoor heat exchanger.

[0149] The indoor heat exchanger includes a heat exchanger windward surface 2115 located at a side thereof away from the centrifugal fan. The heat exchanger windward surface includes a windward surface contour line 21151 extending along the width direction of the indoor heat exchanger.

[0150] In the front-to-back direction of the main body, the point on the windward surface contour line that is farthest from the front end of the main body is the last point A2 of the windward surface contour line. In the height direction of the main body, the last point of the windward surface contour line is located between the first end and the second end of the heat exchanger.

[0151] refer to Figure 8 The portion of the windward surface contour line that is located behind the water receiving tray and not higher than the last point of the windward surface contour line is the second windward contour line 211512. The angle between the tangent line of the second windward contour line and the second plane is the tenth angle α10.

[0152] In this application, α10 ≥ the fifty-first parameter value. The fifty-first parameter value can be any value between 45° and 55°. The fifty-first parameter value can be 45°. α10 ≥ 45°. This makes the second windward profile line sufficiently inclined, enabling the condensed water on the part of the second windward profile line corresponding to the indoor heat exchanger to flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger; reducing the size of the water receiving tray in the front-back direction of the main body, reducing the blockage of the indoor air inlet by the water receiving tray, and increasing the air intake volume; reducing the distance between the indoor heat exchanger in the front-back direction of the main body, reducing the size of the main body in the front-back direction, and increasing the installation range of the air conditioner indoor unit, enabling the air conditioner indoor unit to be installed in small spaces such as kitchens.

[0153] In this application, referring to Figure 8 , when the centrifugal fan rotates, the diameter of the largest 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.

[0154] In this application, L1 / D1 ≤ the fifth parameter value. The fifth parameter value can be any value between 1 / 3 and 1 / 2. The fifth parameter value 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 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.

[0155] In this application, referring to Figure 9 , the indoor heat exchanger includes a heat exchanger leeward surface 2113. The heat exchanger leeward surface is located on the side of the indoor heat exchanger close to the centrifugal fan. The centrifugal fan includes a centrifugal volute.

[0156] In this application, referring to Figure 9 , the minimum distance between the top end of the heat exchanger leeward surface and the centrifugal volute is the seventeenth distance L17.

[0157] In this application, L17 ≤ the fifty-second parameter value. The fifty-second parameter value can be any value between 28 mm and 32 mm. The fifty-second parameter value can be 30 mm. This avoids the problem that the distance between the top end of the heat exchanger leeward surface and the centrifugal volute is too large, resulting in an excessive size of the main body in the front-back direction and affecting the installation and application range of the air conditioner indoor unit.

[0158] In this application, referring to Figure 9 , the minimum distance between the bottom end of the heat exchanger leeward surface and the centrifugal volute is the eighteenth distance L18.

[0159] In this application, L18 ≤ the value of the fifty-third parameter. The value of the fifty-third parameter can be any value in the range of 28 mm to 32 mm. The value of the fifty-third parameter can be 30 mm. This is to prevent the distance between the top of the leeward side of the heat exchanger and the centrifugal volute from being too large, which may cause the overall front-back dimension to be too large and affect the installation and application range of the air conditioner indoor unit.

[0160] In this application, referring to Figures 10 - 11 , the centrifugal volute 221 includes a first side plate 2214. The centrifugal volute 221 may include a second side plate 2215. 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 axis of the centrifugal fan.

[0161] In this application, referring to Figures 10 - 11 , the centrifugal fan may include an enclosing plate 2216. The enclosing plate may be disposed between the first side plate and the second side plate. The enclosing plate may surround the outside of the centrifugal fan.

[0162] The enclosing plate, the first side plate, and the second side plate are connected to enclose a volute air duct and a volute air outlet.

[0163] In this application, referring to Figures 10 - 11 , the enclosing plate may include a volute tongue 22161. The volute air outlet may be formed at the front end of the volute tongue.

[0164] In this application, referring to Figures 10 - 11 , the enclosing plate may include a first air outlet plate 22162. The first air outlet plate may be spaced apart from the volute tongue.

[0165] The first air outlet plate may be located above the volute tongue. The volute air outlet may be formed at the front end of the first air outlet plate.

[0166] In this application, the minimum distance between the volute tongue and the first air outlet plate may be the fifth distance L5.

[0167] In this application, referring to Figures 10 - 11 , the first air outlet plate may include a first point A1. The minimum distance between the first point A1 and the volute tongue is the fifth distance L5.

[0168] The first point A may be located between the front end and the rear end of the first air outlet plate.

[0169] In this application, referring to Figures 10 - 11 , 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.

[0170] In this application, L5 / D1 ≥ the eleventh parameter value. The eleventh parameter value can be any value between 1 / 4 and 3 / 8. The eleventh parameter value can be 1 / 3. L5 / D1 ≥ 1 / 3. This can ensure that the minimum distance between the volute tongue and the first air outlet plate is not too small relative to the maximum diameter of the centrifugal fan, and can guarantee the air volume output of the centrifugal fan.

[0171] In this application, L5 / D1 ≤ the twelfth parameter value. The twelfth parameter value can be any value between 5 / 12 and 2 / 3. The twelfth parameter value can be 1 / 2. L5 / D1 ≤ 1 / 2. This can ensure that the minimum distance between the volute tongue and the first air outlet plate is not too large relative to the maximum diameter of the centrifugal fan, and can guarantee the air outlet pressure of the centrifugal fan.

[0172] In this application, 1 / 3 ≤ L5 / D1 ≤ 1 / 2, which can prevent the minimum distance between the volute tongue and the first air outlet plate 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.

[0173] In this application, referring to Figures 10 - 11 , the centrifugal volute includes a volute tongue. The centrifugal fan is disposed inside the centrifugal volute. The centrifugal motor is connected to the centrifugal fan. The centrifugal motor drives the centrifugal fan to rotate. The maximum contour formed by the 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 eighth spacing L8.

[0174] In this application, L8 ≥ the twenty-seventh parameter value. The twenty-seventh parameter value can be any value between 3 mm and 5 mm. The twenty-seventh parameter value can be 4 mm. This can prevent excessive noise caused by too small a distance between the volute tongue and the centrifugal fan.

[0175] In this application, L8 ≤ the twenty-eighth parameter value. The twenty-eighth parameter value can be any value between 8 mm and 12 mm. The twenty-eighth parameter value can 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.

[0176] In this application, 4 mm ≤ L8 ≤ 10 mm, which can prevent excessive noise caused by too small a distance between the volute tongue and the centrifugal fan, and 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.

[0177] In this application, referring to Figure 12 , the centrifugal fan is disposed in the first chamber. The centrifugal fan includes a centrifugal fan.

[0178] The indoor heat exchanger is disposed in the first chamber. The indoor heat exchanger is located behind the centrifugal fan.

[0179] 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 width direction of the indoor heat exchanger is parallel to or lies within the first plane.

[0180] Reference Figure 12 , the indoor heat exchanger is a section. The included angle between the width direction of the indoor heat exchanger and the second plane is the fifth included angle α5.

[0181] In the present application, α5 ≥ the fifty-fourth parameter value. The fifty-fourth parameter value can be any value in the range of 45° - 55°. The fifty-fourth parameter value can be 45°. α5 ≥ 45°. This makes the inclination degree of the indoor heat exchanger relatively large, which is beneficial for the condensed water on the indoor heat exchanger to flow down, reducing the influence of condensed water on the performance attenuation of the indoor heat exchanger; it is convenient to flow into the water receiving tray, avoiding the condensed water from flowing out of the indoor air inlet, and can reduce the size of the water receiving tray in the front-back direction, reducing the blockage of the water receiving tray to the indoor air inlet and increasing the air inlet volume.

[0182] In the present application, α5 ≤ the fifty-fifth parameter value. The fifty-fifth parameter value can be any value in the range of 135° - 145°. The fifty-fifth value can be 145°. α5 ≤ 145°. This makes the inclination degree of the indoor heat exchanger relatively large, which is beneficial for the condensed water on the indoor heat exchanger to flow down, reducing the influence of condensed water on the performance attenuation of the indoor heat exchanger; it is convenient to flow into the water receiving tray, avoiding the condensed water from flowing out of the indoor air inlet, and can reduce the size of the water receiving tray in the front-back direction, reducing the blockage of the water receiving tray to the indoor air inlet and increasing the air inlet volume.

[0183] In the present application, 45° ≤ α5 ≤ 145°, which makes the inclination degree of the indoor heat exchanger relatively large, beneficial for the condensed water on the indoor heat exchanger to flow down, reducing the influence of condensed water on the performance attenuation of the indoor heat exchanger; it is convenient to flow into the water receiving tray, avoiding the condensed water from flowing out of the indoor air inlet, and can reduce the size of the water receiving tray in the front-back direction, reducing the blockage of the water receiving tray to the indoor air inlet and increasing the air inlet volume; and can increase the heat exchanger area of the indoor heat exchanger under the condition that the main body height dimension is relatively determined, improving the heat exchange effect. On the premise of ensuring the heat exchanger area, it can appropriately reduce the height dimension 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 relatively small heights such as door bodies or windows.

[0184] In the present application, reference Figure 12 , the minimum distance between the indoor heat exchanger and the centrifugal volute is the nineteenth distance L19.

[0185] In this application, L19 ≥ the fifty-sixth parameter value. The fifty-sixth parameter value can be any value in the range of 4 mm - 6 mm. The fifty-sixth parameter value can be 5 mm. L19 ≥ 5 mm. This can avoid excessive noise caused by the proximity of the indoor heat exchanger to the centrifugal volute.

[0186] In this application, the centrifugal fan includes a centrifugal volute. A volute air inlet is formed on the centrifugal volute. The centrifugal fan is disposed within 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 points on the centrifugal fan is the outer contour 2221 of the centrifugal fan.

[0187] The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0188] In the radial direction of the centrifugal fan, the outer contour of the centrifugal fan surrounds the outside of the volute air inlet.

[0189] Reference Figure 13 , 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 twentieth distance L20.

[0190] In this application, L20 ≥ the fifty-seventh parameter value. The fifty-seventh parameter value can be any value in the range of 2 mm - 4 mm. The fifty-seventh parameter value can be 3 mm. L20 ≥ 3 mm. This can improve the air intake efficiency and avoid air return.

[0191] In this application, L20 ≤ the fifty-eighth parameter value. The fifty-eighth parameter value can be any value in the range of 18 mm - 22 mm. The fifty-eighth parameter value can be 20 mm. This can minimize the obstruction of the centrifugal volute to the centrifugal fan and ensure the air volume.

[0192] In this application, 3 mm ≤ L20 ≤ 20 mm, which can improve the air intake efficiency, avoid air return, and minimize the obstruction of the centrifugal volute to the centrifugal fan and ensure the air volume.

[0193] In this application, the indoor heat exchanger is disposed in the first chamber. The indoor heat exchanger is located behind the centrifugal fan.

[0194] The water receiving tray can be disposed below the indoor heat exchanger to receive the condensed water flowing down from the indoor heat exchanger. The water receiving tray is located above the indoor air inlet.

[0195] Reference Figure 14 , the indoor air inlet includes a first air inlet 111. The indoor air inlet includes a second air inlet 112. The first air inlet 111 and the second air inlet are arranged front and back. The first air inlet is disposed behind the water receiving tray. The first air inlet is located below the first-stage heat exchanger. The second air inlet is disposed in front of the water receiving tray.

[0196] In this application, referenceFigure 15 , the indoor heat exchanger includes a first-stage heat exchanger 212.

[0197] The first-stage heat exchanger 212 has a width direction. The top and bottom ends of the first-stage heat exchanger 212 are the two ends in the width direction of the first-stage heat exchanger.

[0198] In the front-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.

[0199] The width direction of the first-stage heat exchanger is parallel to or lies within the first plane.

[0200] In this application, referring to Figure 15 , the indoor heat exchanger includes a second-stage heat exchanger 213. The second-stage heat exchanger 213 is located in front of the first-stage heat exchanger.

[0201] The second-stage heat exchanger 213 has a width direction. The top and bottom ends of the second-stage heat exchanger 213 are the two ends in the width direction of the second-stage heat exchanger.

[0202] The width direction of the second-stage heat exchanger is parallel to or lies within the first plane.

[0203] In this application, the water receiving tray is located below the bottom end of the first-stage heat exchanger. The water receiving tray is located below the bottom end of the second-stage heat exchanger.

[0204] In this application, referring to Figure 16 , the included angle between the width direction of the first-stage heat exchanger and the second plane is the second included angle α2.

[0205] In this application, α2 ≥ the fifty-ninth parameter value. The fifty-ninth parameter value can be any value in the range of 45° - 55°. The fifty-fourth parameter value can be 45°. α2 ≥ 45°. This makes the inclination degree of the first-stage heat exchanger larger, which is beneficial for the condensed water on the first-stage heat exchanger to flow down, reducing the influence of condensed water on the performance attenuation of the first-stage heat exchanger.

[0206] In this application, referring to Figure 16 , the included angle between the width direction of the second-stage heat exchanger and the second plane is the third included angle α3.

[0207] In this application, α3 ≥ the sixtieth parameter value. The sixtieth parameter value can be any value in the range of 45° - 55°. The sixtieth parameter value can be 45°. α3 ≥ 45°. This makes the inclination degree of the first-stage heat exchanger larger, which is beneficial for the condensed water on the first-stage heat exchanger to flow down, reducing the influence of condensed water on the performance attenuation of the first-stage heat exchanger.

[0208] A first-stage heat exchanger and a second-stage heat exchanger disposed in front of the first-stage heat exchanger are provided, which can increase the heat exchanger area of the indoor heat exchanger while the overall height dimension of the main body is relatively determined, improving the heat exchange effect; while ensuring the heat exchanger area, the height dimension of the main body can be appropriately reduced, which can expand the installation and usage range of the air conditioner indoor unit, enabling the air conditioner indoor unit to be installed in small spaces such as kitchens and in places with relatively small heights such as door bodies or windows; a first air inlet disposed behind the water receiving tray and below the first-stage heat exchanger and a second air inlet disposed in front of the water receiving tray are provided, so that both the first-stage heat exchanger and the second-stage heat exchanger have their own independent air inlet areas, allowing the air flow to directly, quickly and smoothly enter the corresponding indoor heat exchanger, which can greatly improve the air inlet efficiency of the indoor heat exchanger.

[0209] Set α2≥45° and α3≥45°, so that the inclination degrees of the first-stage heat exchanger and the second-stage heat exchanger are relatively large, which is conducive to the condensation water on the first-stage heat exchanger and the second-stage heat exchanger flowing down, reducing the influence of the condensation water on the performance degradation of the first-stage heat exchanger and the second-stage heat exchanger, facilitating it to flow into the water receiving tray, preventing the condensation water from flowing out of the indoor air inlet, and can reduce the size of the water receiving tray in the front-rear direction, reducing the blockage of the water receiving tray to the indoor air inlet and increasing the air inlet volume.

[0210] In the present application, in the front-rear 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, so that the second-stage heat exchanger is inclined, and when the height of the installation space of the second-stage heat exchanger is limited, the heat exchange area of the second-stage heat exchanger is increased.

[0211] In the present application, the width direction of the second-stage heat exchanger is parallel to the height direction of the main body, which can make the space occupied by the second-stage heat exchanger in the front-rear direction of the main body smaller, reduce the size of the main body in the front-rear direction, and reduce the size of the water receiving tray in the front-rear direction, reducing the blockage of the water receiving tray to the indoor air inlet.

[0212] In the present application, in the height direction of the main body, the rotation axis of the centrifugal fan is located on one side of the second-stage heat exchanger close to the top of the main body, avoiding the second-stage heat exchanger being higher than the rotation axis of the centrifugal fan and preventing the second-stage heat exchanger from blocking the air inlet of the volute too much and affecting the air inlet of the volute air inlet.

[0213] In the present application, refer to Figure 17 , the minimum distance between the plane passing through the rotation axis of the centrifugal fan and parallel to the second plane and the second-stage heat exchanger is the twenty-first distance L21.

[0214] In this application, L21 ≤ the sixty-first parameter value. The sixty-first parameter value can be any value in the range of 18 mm to 22 mm. The sixty-first parameter value can be 20 mm. L21 ≤ 20 mm. This can prevent the second-stage heat exchanger from being too far below the rotation axis of the centrifugal fan, which may affect the length of the second-stage heat exchanger, and ensure the heat exchange area of the second-stage heat exchanger.

[0215] In this application, in the height direction of the main body, the top end of the first-stage heat exchanger is located on the side of the rotation axis of the centrifugal fan closer to the top of the main body. This can increase the height of the first-stage heat exchanger, increase the heat exchange area of the first-stage heat exchanger, and make full use of the height space of the main body to increase the heat exchange area of the first-stage heat exchanger.

[0216] In this application, in the height direction of the main body, the top end of the first-stage heat exchanger is located on the side of the top end of the second-stage heat exchanger closer to the top of the main body. Compared with the second-stage heat exchanger, this can increase the height of the first-stage heat exchanger, increase the heat exchange area of the first-stage heat exchanger, and make full use of the height space of the main body to increase the heat exchange area of the first-stage heat exchanger.

[0217] In this application, the centrifugal fan includes a centrifugal volute. The centrifugal fan is arranged inside the centrifugal volute. The contact sealing between the second-stage heat exchanger and the centrifugal volute can avoid adding seals, reduce the number of parts and save costs, and prevent the addition of a sealing structure between the second-stage heat exchanger and the centrifugal volute from increasing the dimensions of the main body in the height direction or the front-rear direction, minimizing the height dimension and the front-rear dimension of the main body and improving the installation suitability range of the indoor air conditioner.

[0218] In this application, referring to Figure 18 , a water receiving groove 231 is formed on the water receiving tray.

[0219] In this application, referring to Figure 18 , the water receiving groove has a bottom surface 2311 of the water receiving groove located at the bottom of the water receiving groove.

[0220] In this application, the bottom end of the first-stage heat exchanger is inserted into the water receiving groove, which can reduce the dimension of the main body in the height direction.

[0221] In this application, the first-stage heat exchanger is located above the bottom surface of the water receiving groove.

[0222] Referring to Figure 18 , in the height direction of the main body, the minimum distance between the bottom surface of the water receiving groove and the first-stage heat exchanger is the twenty-second distance L22.

[0223] In this application, L22 ≥ the sixty-second parameter value. The sixty-second parameter value can be any value in the range of 3 mm - 5 mm. The sixty-second parameter value can be 3 mm. L22 ≥ 3 mm. This makes the first heat exchanger a certain distance above the bottom surface of the water receiving tank, preventing the water in the water receiving tank from submerging the first heat exchanger too much and affecting the heat exchange effect of the first heat exchanger.

[0224] In this application, the first heat exchanger is in contact with the bottom surface of the water receiving tank, which can reduce the size in the height direction of the main body and enable the water receiving tray to provide better support for the first heat exchanger.

[0225] In this application, the bottom end of the second heat exchanger is inserted into the water receiving tank.

[0226] In this application, referring to Figure 18 , the second heat exchanger is located above the bottom surface of the water receiving tank. In the height direction of the main body, the minimum distance between the bottom surface of the water receiving tank and the second heat exchanger is the twenty-third distance L23.

[0227] In this application, L23 ≥ the sixty-third parameter value. The sixty-third parameter value can be any value in the range of 3 mm - 5 mm. The sixty-third parameter value can be 3 mm. L23 ≥ 3 mm. This makes the second heat exchanger a certain distance above the bottom surface of the water receiving tank, preventing the water in the water receiving tank from submerging the second heat exchanger too much and affecting the heat exchange effect of the second heat exchanger.

[0228] In this application, the second heat exchanger is in contact with the bottom surface of the water receiving tank, which can reduce the size in the height direction of the main body and enable the water receiving tray to provide better support for the second heat exchanger.

[0229] In this application, the indoor heat exchanger is arranged in the first cavity. The indoor heat exchanger is located behind the centrifugal fan.

[0230] In this application, referring to Figure 19 , the indoor heat exchanger may include the first heat exchanger 212. The first heat exchanger has a width direction. The top end and the bottom end of the first heat exchanger are the two ends in the width direction of the first heat exchanger.

[0231] In the front-back direction of the main body, the top end of the first heat exchanger is in front of the bottom end of the first heat exchanger.

[0232] In this application, the width direction of the first heat exchanger is arranged at an angle to the second plane.

[0233] In this application, the width direction of the first heat exchanger is parallel to the first plane or lies within the first plane.

[0234] In this application, referring to Figure 19, 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.

[0235] In the front-rear direction of the main body, the bottom end of the second-stage heat exchanger is located in front of the top end of the second-stage heat exchanger.

[0236] In this application, the width direction of the second-stage heat exchanger is arranged at an angle with the second plane.

[0237] In this application, the width direction of the second-stage heat exchanger is parallel to the first plane or lies within the first plane.

[0238] In this application, refer to Figure 19 , 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 the two ends in the width direction of the third-stage heat exchanger.

[0239] In this application, the top end of the third-stage heat exchanger is connected to the bottom end of the first-stage heat exchanger.

[0240] In this application, the bottom end of the third-stage heat exchanger is connected to the top end of the second-stage heat exchanger.

[0241] In this application, the width direction of the third-stage heat exchanger is parallel to the first plane or lies within the first plane.

[0242] In this application, refer to Figure 19 , the included angle between the width direction of the second-stage heat exchanger and the second plane is the third included angle α3.

[0243] In this application, the second included angle α2 ≥ the sixty-fourth parameter value. The sixty-fourth parameter value may be any value between 45° and 55°. The sixty-fourth parameter value may be 45°. The second included angle α2 ≥ 45°. So that the inclination of the second-stage heat exchanger is large enough, so that the condensed water on the second-stage heat exchanger can flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the second-stage heat exchanger.

[0244] In this application, refer to Figure 19 , the included angle between the width direction of the third-stage heat exchanger and the second plane is the eighth included angle α8.

[0245] In this application, α8 ≥ the forty-fifth parameter value. The forty-fifth parameter value may be any value between 45° and 55°. The forty-fifth parameter value may be 45°. α8 ≥ 45°. It can improve the effect of discharging condensed water of the third-stage heat exchanger, avoiding the influence of condensed water on the performance attenuation of the third-stage heat exchanger.

[0246] The first-stage heat exchanger, the second-stage heat exchanger and the third-stage heat exchanger are provided, which can increase the heat exchanger area of the indoor heat exchanger while the overall height dimension is relatively determined, improving the heat exchange effect; on the premise of ensuring the heat exchanger area, the overall height dimension of the main body can be appropriately reduced, which can 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 relatively small heights such as door bodies or windows. Moreover, the direction of the air flowing through the first-stage heat exchanger, the second-stage heat exchanger and the third-stage heat exchanger is different, which can disperse the direction of the air flow in advance before the air flows out of the indoor air outlet, and then converge at the indoor air outlet, which can improve the rapid diffusion of the air into the indoor air, avoid direct blowing of the air, and improve the comfort of the air sent out from the indoor air outlet; setting α2≥45° and α8≥45° makes the inclination of the second-stage heat exchanger and the third-stage heat exchanger large enough, so that the condensed water on the second-stage heat exchanger and the third-stage heat exchanger can flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the second-stage heat exchanger and the third-stage heat exchanger, facilitating it to flow into the water receiving tray, preventing the condensed water from flowing out of the indoor air inlet, and being able to reduce the size of the water receiving tray in the front-back direction, reducing the blockage of the water receiving tray to the indoor air inlet and increasing the air intake volume.

[0247] In the present application, the rotation axis of the centrifugal fan can be perpendicular to the first plane.

[0248] In the present application, referring to Figure 20 , the shroud has a shroud inner wall surface. The shroud inner wall surface has a shroud inner contour line 22163. The shroud inner contour line includes a volute tongue inner contour line provided on the volute tongue.

[0249] The shroud inner contour line includes a shroud first contour line 221634 connected to the volute tongue inner contour line.

[0250] The shroud inner contour line 22163 is parallel to or lies in the first plane.

[0251] In the present application, referring to Figure 20 , the volute tongue inner contour line includes a volute tongue air outlet section 221631. The volute tongue air outlet section is provided at one end of the volute tongue forming the volute casing air outlet.

[0252] The volute tongue inner contour line further includes a volute tongue air inlet section 226132. The volute tongue air inlet section is provided at one end of the volute tongue away from the volute casing air outlet.

[0253] The volute tongue inner contour line includes a volute tongue connection section 221633. The volute tongue connection section is connected between the volute tongue air inlet section and the volute tongue air outlet section.

[0254] In the present application, referring to Figure 20 , the connection point between the volute tongue connection section and the volute tongue air inlet section is the third point A3.

[0255] In this application, refer to Figure 20 , in the first plane where the inner contour line 22163 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 contour line of the shroud is the fourth point A4.

[0256] In this application, refer to Figure 20 , in the first plane where the inner contour line 22163 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 22163 of the shroud are the fifth point A5 and the sixth point A6 respectively.

[0257] Along the extension direction of the inner contour line 22163 of the shroud, the fifth point A5 is located between the third point A3 and the fourth point A4.

[0258] In this application, refer to Figure 20 , in the first plane where the inner contour line 22163 of the shroud is located, the maximum contour when the centrifugal fan rotates is the first contour of the centrifugal fan.

[0259] The minimum distance between the third point A3 and the first contour of the centrifugal fan is the twenty-fourth distance L24.

[0260] The minimum distance between the fourth point A4 and the first contour of the centrifugal fan is the twenty-fifth distance L25.

[0261] The minimum distance between the fifth point A5 and the first contour of the centrifugal fan is the twenty-sixth distance L26.

[0262] The minimum distance between the sixth point A6 and the first contour of the centrifugal fan is the twenty-seventh distance L27.

[0263] L27≥L24. L24≥L25. L25≥L24. It can make the distance between the first contour of the centrifugal fan and the inner contour line 22163 of the shroud gradually increase, and can increase the air pressure in the centrifugal volute.

[0264] L27 / L24≥the sixty-fifth parameter value. The sixty-fifth parameter value can be any value between 4 and 6. The sixty-fifth parameter value can be 4. L27 / L24≥4. It can increase the air pressure in the centrifugal volute and improve the wind resistance of the centrifugal air duct.

[0265] In this application, the housing can include a bottom plate 131. The bottom plate can be provided at the bottom of the housing.

[0266] In this application, the indoor air inlet can be formed on the bottom plate.

[0267] In this application, refer to Figure 21, a first mounting opening 1311 may be formed on the bottom plate 131. The first mounting opening may penetrate the bottom plate in the thickness direction of the bottom plate.

[0268] In the present application, referring to Figure 21 , the casing 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 1311.

[0269] 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 cavity.

[0270] In the present application, the first filter screen may be installed on the casing. The first filter screen may be installed inside the indoor air inlet.

[0271] In the present application, the first filter screen may be installed on the bottom plate 131.

[0272] In the present application, the first filter screen may be installed on the air inlet grille.

[0273] 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.

[0274] In the present application, the oil fume filter screen may be provided inside the indoor air inlet.

[0275] In the present application, the oil fume filter screen may be connected to the bottom plate.

[0276] In the present application, the oil fume filter screen may be connected to the air inlet grille.

[0277] In the present application, the oil fume filter screen may be connected to the first filter screen.

[0278] In the present application, referring to Figure 21 , the casing may include a front panel 133. The front panel 133 may be provided on the front side of the casing. An indoor air outlet may be formed on the front panel 133.

[0279] In the present application, referring to Figure 21 , the main body may include a first air deflector 134. The first air deflector is rotatably connected to the casing. The first air deflector can partially open the indoor air outlet.

[0280] Referring to Figure 21 , the main body may include a second air deflector 135. The second air deflector is rotatably connected to the casing. The second air deflector can partially open the indoor air outlet.

[0281] In the height direction of the main body, the first air deflector 134 may be located on the side of the second air deflector closer to the top of the main body.

[0282] The first air deflector and the second air deflector jointly close the indoor air outlet.

[0283] In the present application, the first air deflector and the second air deflector can be horizontally arranged simultaneously to blow air forward, avoiding direct blowing of the air onto people.

[0284] In the present application, the first air deflector and the second air deflector can be arranged to slope downwards, so that the air blows forward and downwards, giving the user a sense of air flow.

[0285] In the present application, the indoor unit of the air conditioner can be an embedded indoor unit of the air conditioner. The indoor unit of the air conditioner can be embedded in the ceiling 903.

[0286] In the present application, referring to Figure 22 , a first ceiling opening 9031 can be provided on the ceiling 903. The air below the ceiling 903 enters the first cavity through the first ceiling opening 9031.

[0287] In the present application, referring to Figure 22 , the indoor unit of the air conditioner can include an air outlet housing 34. The air outlet housing can be at least partially located above the ceiling. The air outlet housing can be connected to the housing. The air outlet housing can be located at the indoor air outlet.

[0288] In the present application, referring to Figure 22 , an air outlet duct 341 can be formed inside the air outlet housing. The air outlet duct can communicate with the first cavity through the indoor air outlet.

[0289] In the present application, referring to Figure 22 , a second ceiling opening 9032 can be provided on the ceiling. The air in the first cavity flows into the air outlet duct through the indoor air outlet and then flows to below the ceiling through the second ceiling opening.

[0290] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than 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 recorded 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.

[0291] For the sake of convenience in explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. 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 variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioner indoor unit, characterized in that, Comprising: A main body, the direction from the bottom to the top of the main body being the height direction of the main body, and the main body at least including a first cavity located within the main body; The main body includes: A casing, an indoor air inlet being provided at the bottom of the casing, and an indoor air outlet being provided at the front side of the casing, the indoor air outlet and the indoor air inlet being in communication with the first cavity; A centrifugal fan, provided within the first cavity and including a centrifugal impeller; An indoor heat exchanger, provided within the first cavity; the indoor heat exchanger being located at the rear side of the centrifugal fan; Defining a plane perpendicular to the length direction of the main body as a first plane; The indoor heat exchanger is a section; the indoor heat exchanger has a width direction, and the width direction of the indoor heat exchanger is parallel to or lies within the first plane; the indoor heat exchanger includes a first heat exchanger end and a second heat exchanger end that are oppositely arranged in its width direction; In the height direction of the main body, the second heat exchanger end is located on the side of the first heat exchanger end closer to the bottom of the main body; Along the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped or zigzag-shaped; the indoor heat exchanger bulges towards the side away from the centrifugal fan.

2. The air conditioner indoor unit according to claim 1, wherein Defining a plane perpendicular to the height direction of the main body as a second plane; The indoor heat exchanger includes a heat exchanger windward surface on the side away from the centrifugal fan; The heat exchanger windward surface includes a windward surface contour line extending along the width direction of the indoor heat exchanger; the length of the windward surface contour line is a fourth length W4; The windward surface contour line includes a first windward contour line, and the angle between the tangent of the first windward contour line and the second plane is a ninth angle α9, α9≥45°; The midpoint of the windward surface contour line is located on the first windward contour line; The length of the contour line between the vertex of the first windward contour line and the midpoint of the windward surface contour line is a fifth length W5, and the length of the contour line between the lowest point of the first windward contour line and the midpoint of the windward surface contour line is a sixth length W6, 1 / 4≤W5 / W4≤2 / 5, 1 / 4≤W6 / W4≤2 / 5.

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; The main body includes: A water receiving tray, provided below the second heat exchanger end to receive the condensed water flowing down from the indoor heat exchanger; The indoor heat exchanger includes a heat exchanger windward surface on the side away from the centrifugal fan; the heat exchanger windward surface includes a windward surface contour line extending along the width direction of the indoor heat exchanger; In the front-rear direction of the main body, the point on the windward surface contour line farthest from the front end of the main body is the last point A2 of the windward surface contour line; in the height direction of the main body, the last point A2 of the windward surface contour line is located between the first heat exchanger end and the second heat exchanger end; The part of the windward surface contour line located behind the water receiving tray and not higher than the last point of the windward surface contour line is a second windward contour line, and the angle between the tangent of the second windward contour line and the second plane is a tenth angle α10, α10≥45°.

4. The indoor air conditioner according to claim 1, characterized in that, The centrifugal fan includes: A centrifugal volute; A centrifugal impeller, provided within 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 diameter of the contour formed by the rotation of the points on the centrifugal fan is the maximum diameter D1 of the 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, and L1 / D1 ≤ 1 / 2.

5. The air conditioner indoor unit according to claim 1, characterized in that, The indoor heat exchanger includes a back wind surface of the heat exchanger, and the back wind surface of the heat exchanger is located on the side of the indoor heat exchanger close to the centrifugal fan; the centrifugal fan includes a centrifugal volute. The minimum distance between the top end of the back wind surface of the heat exchanger and the centrifugal volute is the seventeenth distance L17, and L17 ≤ 30 mm.

6. The indoor air conditioner according to claim 1, characterized in that, The indoor heat exchanger includes a back wind surface of the heat exchanger, and the back wind surface of the heat exchanger is located on the side of the indoor heat exchanger close to the centrifugal fan; the centrifugal fan includes a centrifugal volute. The minimum distance between the bottom end of the back wind surface of the heat exchanger and the centrifugal volute is the eighteenth distance L18, and L18 ≤ 30 mm.

7. An air conditioner indoor unit, characterized in that, Including: A main body, with the direction from its bottom to its top being the height direction of the main body, and the main body at least includes a first cavity located inside the main body; The main body includes: A casing, with an indoor air inlet provided at its bottom, and an indoor air outlet provided at the front side of the casing. The indoor air outlet and the indoor air inlet are communicated with the first cavity; A centrifugal fan, provided in the first cavity and including a centrifugal fan and a centrifugal volute; An indoor heat exchanger, provided in the first cavity; the indoor heat exchanger is located behind the centrifugal fan; Define the plane perpendicular to the height direction of the main body as the second plane; 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 a section; The included angle between the width direction of the indoor heat exchanger and the second plane is the fifth included angle α5, and 45° ≤ α5 ≤ 145°; The minimum distance between the indoor heat exchanger and the centrifugal volute is the nineteenth distance L19, and L19 ≥ 5 mm.

8. The air conditioner indoor unit according to claim 1 or 7, characterized in that The centrifugal fan includes: A centrifugal volute, with a volute air inlet formed thereon; A centrifugal fan, provided inside 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 the 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 outside 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 the twentieth distance L20, and 3 mm ≤ L20 ≤ 20 mm.

9. The air conditioner indoor unit according to claim 1 or 7, characterized in that, The centrifugal fan includes: A centrifugal volute, with a volute air outlet formed thereon and a volute air duct formed inside it, and the volute air duct is communicated with the volute air outlet; A centrifugal fan, provided in the volute air duct; A centrifugal motor, connected to the centrifugal fan and driving the centrifugal fan to rotate; The centrifugal volute includes a first side plate, a second side plate and an enclosing plate. The first side plate and the second side plate are oppositely arranged and are respectively disposed on both sides of the axial direction of the centrifugal fan. The enclosing plate is disposed between the first side plate and the second side plate and surrounds the outside of the centrifugal fan; The enclosing plate, the first side plate and the second side plate are connected to form the volute air duct and the volute air outlet; The enclosing plate includes a volute tongue and a first air outlet plate. The first air outlet plate is located above the volute tongue and is spaced from the volute tongue. The volute air outlet is formed at the front ends of the volute tongue and the first air outlet plate; The minimum distance between the volute tongue and the first air outlet plate is the fifth distance L5. The first air outlet plate includes a first point A. The minimum distance between the first point A and the volute tongue is the fifth distance. The first point A is located between the front end and the rear end of the first air outlet plate; 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, and 1 / 3 ≤ L5 / D1 ≤ 1 / 2.

10. The air conditioner indoor unit according to claim 1 or 7, characterized in that, The centrifugal fan includes: A centrifugal volute including a volute tongue; A centrifugal fan disposed inside the centrifugal volute; A centrifugal motor connected to the centrifugal fan and driving 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; The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the eighth spacing L8, and 4 mm ≤ L8 ≤ 10 mm.

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