Indoor unit of air conditioner

Abstract

The utility model provides an air conditioner indoor unit which comprises a machine shell, an indoor air inlet is formed in the front side of the machine shell, and an indoor air outlet is formed in the bottom of the machine shell. The indoor heat exchanger is located on the front side of the centrifugal fan; in the front-back direction of the main body, the bottom end of the first-section heat exchanger is located in front of the top end of the first-section heat exchanger; in the front-back direction of the main body, the top end of the second-section heat exchanger is located in front of the bottom end of the second-section heat exchanger; the top end of the third-section heat exchanger is connected with the bottom end of the first-section heat exchanger; the bottom end is connected with the top end of the second-section heat exchanger; the included angle between the width direction of the first-section heat exchanger and the width direction of the third-section heat exchanger is a fifth included angle alpha 5, and alpha 5 is larger than 90 degrees and smaller than 180 degrees; the included angle between the width direction of the third-section heat exchanger and the width direction of the second-section heat exchanger is a sixth included angle alpha6 which is larger than 90 degrees and smaller than 180 degrees, the heat exchanger area of the indoor heat exchanger can be increased under the condition that the height size and the front-back size of the main body are relatively determined, and the heat exchange effect is improved.

Description

Technical Field

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

[0002] In small space scenarios such as kitchens, bathrooms, small bedrooms, storage rooms, convenience stores, etc., the indoor wall space is very limited. For example, there are range hoods, cabinets, windows, doors connecting to the living room, refrigerators placed, etc. around the walls of the kitchen. There is a ceiling at the top of the wall. If an air conditioner is to be installed, 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 lower front 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. But after the conventional wall-mounted unit is installed close to the ceiling, the air inlet of the wall-mounted air conditioner indoor unit will be blocked and air cannot enter.

[0004] In order to solve the problem that the air inlet cannot intake air due to being blocked, a forward air intake and bottom air outlet type air conditioner indoor unit is provided, that is, the air inlet is provided at the front part and the air outlet is provided at the bottom, and the indoor fan is a centrifugal fan. However, the forward air intake and bottom air outlet type air conditioner indoor unit 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 a certain extent.

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

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

[0008] The main body includes:

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

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

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

[0012] The indoor heat exchanger includes:

[0013] The first-stage heat exchanger, the top end and the bottom end of which are the two ends in the width direction of the first-stage heat exchanger; in the front-back direction of the main body, the bottom end of the first-stage heat exchanger is located in front of the top end of the first-stage heat exchanger;

[0014] The second-stage heat exchanger, the top end and the bottom end of which are the two ends in the width direction of the second-stage heat exchanger; in the front-back direction of the main body, the top end of the second-stage heat exchanger is located in front of the bottom end of the second-stage heat exchanger;

[0015] The third-stage heat exchanger, the top end and the bottom end of which are the two ends in the width direction of the third-stage heat exchanger; the top end of the third-stage heat exchanger is connected to the bottom end of the first-stage heat exchanger; the bottom end of the third-stage heat exchanger is connected to the top end of the second-stage heat exchanger;

[0016] The included angle between the width direction of the first-stage heat exchanger and the width direction of the third-stage heat exchanger is the fifth included angle α5, 90° < α5 < 180°;

[0017] The included angle between the width direction of the third-stage heat exchanger and the width direction of the second-stage heat exchanger is the sixth included angle α6, 90° < α6 < 180°.

[0018] Setting the indoor heat exchanger to include the first-stage heat exchanger, the second-stage heat exchanger and the third-stage heat exchanger, 90° < α5 < 180°, 90° < α6 < 180°, can increase the heat exchanger area of the indoor heat exchanger and improve the heat exchange effect when the height dimension and the front-back dimension of the main body are relatively determined; on the premise of ensuring the heat exchanger area, the height dimension and the front-back 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.

[0019] According to an embodiment of the present disclosure, a plane perpendicular to the height direction of the main body is defined as the second plane;

[0020] The included angle between the width direction of the first-stage heat exchanger and the second plane is the second included angle α2, α2 ≥ 40°;

[0021] The included angle between the width direction of the second-stage heat exchanger and the second plane is the third included angle α3, 40° ≤ α3 ≤ 70°;

[0022] The included angle between the width direction of the third-stage heat exchanger and the second plane is the fourth included angle α5, and 70° ≤ α4 ≤ 110°.

[0023] By setting α2 ≥ 40°, 70° ≤ α4 ≤ 110°, and 40° ≤ α3 ≤ 70°, it is possible to increase the heat exchange area as much as possible and significantly reduce the front and rear dimensions of the main body while keeping the main body height dimension unchanged, which can reduce costs, make the installation environment of the main body more flexible, be installed in small spaces such as kitchens, and can be installed above doors or windows; at the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0024] According to an embodiment of the present disclosure, the centrifugal fan includes a centrifugal volute, a volute air inlet is formed on the centrifugal volute, a volute air duct is formed inside the centrifugal volute, the volute air inlet and the volute air duct are communicated, and the centrifugal fan is arranged inside the volute air duct;

[0025] The volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan;

[0026] The minimum distance between the first-stage heat exchanger and the volute air inlet is the fourth distance L4, and 8 mm ≤ L4 ≤ 30 mm;

[0027] The minimum distance between the second-stage heat exchanger and the volute air inlet is the fifth distance L5, and 8 mm ≤ L5 ≤ 30 mm.

[0028] It can avoid the distance between the first-stage heat exchanger and the volute air inlet and the distance between the second-stage heat exchanger and the volute air inlet from being too small to avoid generating noise, and can also avoid the distance between the second-stage heat exchanger and the volute air inlet from being too large to avoid reducing the air volume and heat exchange efficiency, and avoid causing the size of the main body in the front and rear directions to be too large, which is convenient for installing the air conditioner indoor unit and saves costs.

[0029] According to an embodiment of the present disclosure, a plane passing through the rotation axis of the centrifugal fan and perpendicular to the front and rear direction of the main body is defined as the third plane;

[0030] The second-stage heat exchanger is located on the side of the third plane close to the indoor air inlet;

[0031] The minimum distance between the second-stage heat exchanger and the third plane is the sixth distance L6, and L6 ≤ 20 mm; it can avoid the distance between the second-stage heat exchanger and the third plane from being too large, avoid causing the size of the main body in the front and rear directions to be too large, be convenient for installing the air conditioner indoor unit, and save costs.

[0032] According to an embodiment of the present disclosure, the main body includes a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct, and a circumferential wall of the centrifugal air duct;

[0033] The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axis of the centrifugal fan, and a volute air inlet is formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct;

[0034] The circumferential wall of the centrifugal air duct is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outside of the centrifugal fan;

[0035] The first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct, and the circumferential wall of the centrifugal air duct enclose a centrifugal air duct. An air outlet of the centrifugal air duct is defined between two opposite ends of the circumferential wall of the centrifugal air duct along the circumferential direction of the centrifugal fan. The air outlet of the centrifugal air duct is located at the bottom end of the centrifugal air duct; the air outlet of the centrifugal air duct and the volute air inlet are communicated with the centrifugal air duct;

[0036] The centrifugal fan includes a centrifugal volute. The volute air inlet is formed on the centrifugal volute. A volute air duct is formed inside the centrifugal volute. The centrifugal air duct includes the volute air duct. The centrifugal fan is arranged inside the volute air duct;

[0037] The circumferential wall of the centrifugal air duct includes a volute tongue. The air outlet of the centrifugal air duct is located at the bottom end of the volute tongue. The bottom end of the volute tongue is located in front of the air outlet of the centrifugal air duct.

[0038] The point on the second-stage heat exchanger closest to the rear end of the main body is the last point of the second-stage heat exchanger;

[0039] In the front-rear direction of the main body, the last point of the second-stage heat exchanger is located behind the bottom end of the volute tongue;

[0040] In the front-rear direction of the main body, the distance between the last point of the second-stage heat exchanger and the bottom end of the volute tongue is a seventh distance L7, and 5 mm ≤ L7 ≤ 10 mm. This can avoid the second-stage heat exchanger being too close to the centrifugal fan, avoid noise, enable the front-rear dimension of the main body to be smaller, facilitate the installation of the air-conditioning indoor unit, and save costs.

[0041] According to an embodiment of the present disclosure, an air-conditioning indoor unit is further provided, including:

[0042] 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;

[0043] The main body includes:

[0044] A casing, an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet communicate with the first chamber;

[0045] A centrifugal fan, which is arranged in the first chamber and includes a centrifugal fan;

[0046] An indoor heat exchanger, which is arranged in the first chamber; the indoor heat exchanger is located in front of the centrifugal fan and behind the indoor air inlet;

[0047] Define the plane perpendicular to the length direction of the main body as the first plane;

[0048] 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 located 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;

[0049] In the height direction of the main body, the second heat exchanger end is located on the side of the first heat exchanger end close to the bottom of the main body;

[0050] Along the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped or zigzag; the indoor heat exchanger bulges toward the side close to the indoor air outlet.

[0051] Limiting the indoor heat exchanger to be arc-shaped or zigzag 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 relatively small heights such as door bodies or windows.

[0052] According to an embodiment of the present disclosure, define the plane perpendicular to the height direction of the main body as the second plane;

[0053] The indoor heat exchanger includes a heat exchanger windward surface on the side away from the centrifugal fan;

[0054] 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 first length W1;

[0055] The windward surface contour line includes a first sub-windward surface contour line, and the included angle between the tangent of the first sub-windward surface contour line and the second plane is the first included angle α1, α1≥45°;

[0056] The midpoint of the windward surface contour line is located on the first sub-windward surface contour line;

[0057] The length of the contour line between the vertex of the first sub-windward surface contour line and the midpoint of the windward surface contour line is the second length W2, and the length of the contour line between the lowest point of the first sub-windward surface contour line and the midpoint of the windward surface contour line is the third length W3, where 1 / 4 ≤ W2 / W1 ≤ 2 / 5 and 1 / 4 ≤ W3 / W1 ≤ 2 / 5.

[0058] This makes the first sub-windward surface contour line inclined enough so that the condensate water on the part of the first sub-windward surface contour line corresponding to the indoor heat exchanger can flow down quickly, avoiding the attenuation effect of the condensate water on the performance of the indoor heat exchanger; it can reduce the distance of the indoor heat exchanger in the front-back direction of the main body, reduce the size in the front-back direction of the main body, improve the installation range of the air-conditioning indoor unit, and enable the air-conditioning indoor unit to be installed in small spaces such as kitchens.

[0059] According to an embodiment of the present disclosure, the centrifugal fan includes a centrifugal volute; the minimum distance between the first end of the heat exchanger and the centrifugal volute is the second distance L2, and L2 ≤ 30 mm. This can avoid the excessive size of the main body in the front-back direction caused by the too large distance between the first end of the heat exchanger and the centrifugal volute, improve the applicability of the air-conditioning indoor unit, enable it to be installed in small spaces such as kitchens, and can be installed in the space at the top of a door or a window.

[0060] According to an embodiment of the present disclosure, the centrifugal fan includes a centrifugal volute; the minimum distance between the second end of the heat exchanger and the centrifugal volute is the third distance L3, and L2 ≤ 30 mm. This can avoid the excessive size of the main body in the front-back direction caused by the too large distance between the second end of the heat exchanger and the centrifugal volute, improve the applicability of the air-conditioning indoor unit, enable it to be installed in small spaces such as kitchens, and can be installed in the space at the top of a door or a window.

[0061] According to an embodiment of the present disclosure, an air-conditioning indoor unit is further provided, including:

[0062] 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;

[0063] The main body includes:

[0064] A housing, an indoor air inlet is provided on the front side of the housing, an indoor air outlet is provided on the bottom of the housing, and the indoor air outlet and the indoor air inlet are communicated with the first cavity;

[0065] A centrifugal fan, which is arranged in the first cavity and includes a centrifugal fan;

[0066] An indoor heat exchanger, which is arranged in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and behind the indoor air inlet;

[0067] Define the plane perpendicular to the height direction of the main body as the second plane;

[0068] The indoor heat exchanger includes:

[0069] The first-stage heat exchanger, the top end and the bottom end of which are the two ends in the width direction of the first-stage heat exchanger; 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;

[0070] The second-stage heat exchanger, the top end and the bottom end of which are the two ends in the width direction of the second-stage heat exchanger; in the front-back direction of the main body, the top end of the second-stage heat exchanger is in front of the bottom end of the second-stage heat exchanger; the top end of the second-stage heat exchanger is connected to the bottom end of the first-stage heat exchanger;

[0071] The included angle between the width direction of the first-stage heat exchanger and the second plane is the second included angle α2, α2 < 45°; the included angle between the width direction of the second-stage heat exchanger and the second plane is the third included angle α3, α3 < 45°;

[0072] It can increase the heat exchange area of the indoor heat exchanger while reducing the height dimension of the main body, can be installed in a small space such as a kitchen, and can be installed above a door or a window.

[0073] According to an embodiment of the present disclosure, the centrifugal fan includes a centrifugal volute, a volute air inlet is formed on the centrifugal volute, a volute air duct is formed in the centrifugal volute, and the centrifugal fan is arranged in the volute air duct;

[0074] The minimum distance between the first-stage heat exchanger and the volute air inlet is the fourth distance L4, 8 mm ≤ L4 ≤ 30 mm; it can avoid the distance between the first-stage heat exchanger and the volute air inlet being too small to generate noise, and can avoid the distance between the first-stage heat exchanger and the volute air inlet being too large to reduce the air volume and heat exchange efficiency, and avoid causing the size of the main body in the front-back direction to be too large, which is convenient for installing the air conditioner indoor unit and saves costs;

[0075] The minimum distance between the second-stage heat exchanger and the volute air inlet is the fifth distance L5, 8 mm ≤ L5 ≤ 30 mm; it can avoid the distance between the second-stage heat exchanger and the volute air inlet being too small to generate noise, and can avoid the distance between the second-stage heat exchanger and the volute air inlet being too large to reduce the air volume and heat exchange efficiency, and avoid causing the size of the main body in the front-back direction to be too large, which is convenient for installing the air conditioner indoor unit and saves costs.

[0076] According to an embodiment of the present disclosure, an air conditioner indoor unit is further proposed, including:

[0077] 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 within the main body;

[0078] The main body includes:

[0079] A housing, with an indoor air inlet provided on the front side of the housing, and an indoor air outlet provided on the bottom of the housing. The indoor air outlet and the indoor air inlet are in communication with the first cavity;

[0080] A centrifugal fan, disposed within the first cavity and including a centrifugal fan;

[0081] An indoor heat exchanger, disposed within the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and behind the indoor air inlet;

[0082] Define the plane perpendicular to the height direction of the main body as the second plane;

[0083] The indoor heat exchanger includes:

[0084] A first-section heat exchanger, with its top end and its bottom end being the two ends in the width direction of the first-section heat exchanger;

[0085] A second-section heat exchanger, with its top end and its bottom end being the two ends in the width direction of the second-section heat exchanger; in the front-back direction of the main body, the top end of the second-section heat exchanger is located in front of the bottom end of the second-section heat exchanger; the top end of the second-section heat exchanger is connected to the bottom end of the first-section heat exchanger;

[0086] The included angle between the width direction of the first-section heat exchanger and the second plane is a second angle α2, α2≥45°;

[0087] The included angle between the width direction of the second-section heat exchanger and the second plane is a third angle α3, α3≥45°;

[0088] The included angle between the width direction of the first-section heat exchanger and the width direction of the second-section heat exchanger is a fourth angle α4, α4<180°, and the opening direction of the fourth angle faces the centrifugal fan.

[0089] The indoor heat exchanger is provided with a first-stage heat exchanger and a second-stage heat exchanger. α2≥45°, α3≥45°, α7<180°. It can increase the heat exchanger area of the indoor heat exchanger under the condition that the main body height dimension is relatively determined, improve the heat exchange effect; it can appropriately reduce the front and rear dimensions of the main body on the premise of ensuring the heat exchanger area, improve the installation and use range of the air conditioner indoor unit, enable the air conditioner indoor unit to be installed in small spaces such as kitchens, and can be installed in places with a relatively small height such as door bodies or windows; make the inclination of the first-stage heat exchanger and the second-stage heat exchanger large enough so that the condensed water on the indoor heat exchanger can flow down quickly, avoiding the attenuation of the performance of the indoor heat exchanger caused by the condensed water.

[0090] According to an embodiment of the present disclosure, an air conditioner indoor unit is further proposed, including:

[0091] 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;

[0092] The main body includes:

[0093] A casing, an indoor air inlet is provided at its bottom, and an indoor air outlet is provided at the front side of the casing. The indoor air outlet and the indoor air inlet are communicated with the first cavity;

[0094] A centrifugal fan is arranged in the first cavity. The centrifugal fan includes a centrifugal volute and a centrifugal fan, and the centrifugal fan is arranged inside the centrifugal volute;

[0095] An indoor heat exchanger is arranged in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and behind the indoor air outlet;

[0096] Define the plane perpendicular to the height direction of the main body as the second plane;

[0097] The indoor heat exchanger has a width direction; the two ends in the width direction of the indoor heat exchanger are the top end and the bottom end of the indoor heat exchanger; the indoor heat exchanger is in one section;

[0098] In the front and rear direction of the main body, the top end of the indoor heat exchanger is located in front of the bottom end of the indoor heat exchanger, and the included angle between the width direction of the indoor heat exchanger and the second plane is the eighth included angle α8, α8≥45°;

[0099] A volute air inlet is formed on the centrifugal volute, and the volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan;

[0100] The minimum distance between the indoor heat exchanger and the volute air inlet is the eighth distance L8, 8mm≤L8≤30mm.

[0101] α8≥45°, which can avoid too small inclination angle of the indoor heat exchanger, enabling the air conditioner indoor unit to have a sufficient inclination angle, facilitating the condensation water on the indoor heat exchanger to flow down, and avoiding the attenuation of the performance of the air conditioner indoor unit caused by the condensation water; 8mm≤L8≤30mm, which can avoid abnormal noise caused by the close distance between the indoor heat exchanger and the air inlet of the volute, and avoid the large front-back dimension of the main body caused by the large distance between the indoor heat exchanger and the air inlet of the volute, affecting the installation and application range of the indoor heat exchanger.

[0102] According to an embodiment of the present disclosure, the centrifugal fan includes:

[0103] A centrifugal volute;

[0104] The centrifugal fan is arranged inside the centrifugal volute;

[0105] A centrifugal motor, connected to the centrifugal fan and driving the centrifugal fan to rotate;

[0106] When the centrifugal fan rotates, the diameter of the maximum contour formed by the points on the centrifugal fan during rotation 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, and 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, enabling the centrifugal fan and the indoor heat exchanger to be arranged as directly opposite as possible, making the air passing through the indoor heat exchanger 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.

[0107] According to an embodiment of the present disclosure, the main body includes a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct, and a peripheral wall of the centrifugal air duct;

[0108] The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axis of the centrifugal fan, and the air inlet of the volute is formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct;

[0109] The peripheral wall of the centrifugal air duct is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outside of the centrifugal fan;

[0110] The first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct, and the peripheral wall of the centrifugal air duct enclose a centrifugal air duct, and the centrifugal air outlet is defined between the two opposite ends of the peripheral wall of the centrifugal air duct along the circumferential direction of the centrifugal fan; the centrifugal air outlet and the air inlet of the volute are communicated with the centrifugal air duct; the centrifugal air outlet is located at the bottom end of the centrifugal air duct;

[0111] The circumferential wall of the centrifugal air duct includes a volute tongue; the circumferential wall of the centrifugal air duct includes an air outlet plate of the centrifugal air duct, and the air outlet plate of the centrifugal air duct is arranged at an interval from the volute tongue and is located behind the volute tongue;

[0112] The air outlet of the centrifugal air duct is formed at the bottom ends of the volute tongue and the air outlet plate of the centrifugal air duct;

[0113] The minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct is the ninth distance L9;

[0114] The air outlet plate of the centrifugal air duct includes a first point A1, and the minimum distance between the first point A1 and the volute tongue is the ninth distance L9; the first point A is located between the top end and the bottom end of the air outlet plate of the centrifugal air duct;

[0115] 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 ≤ L9 / D1 ≤ 1 / 2, which can avoid the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct 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.

[0116] According to an embodiment of the present disclosure, the main body includes a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct, and a circumferential wall of the centrifugal air duct;

[0117] The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axis of the centrifugal fan, and the volute air inlets are formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct;

[0118] The circumferential wall of the centrifugal air duct is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outside of the centrifugal fan;

[0119] The first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct, and the circumferential wall of the centrifugal air duct enclose a centrifugal air duct. The circumferential wall of the centrifugal air duct defines an air outlet of the centrifugal air duct between the two opposite ends along the circumferential direction of the centrifugal fan; the air outlet of the centrifugal air duct and the volute air inlet are communicated with the centrifugal air duct; the air outlet of the centrifugal air duct is located at the bottom end of the centrifugal air duct;

[0120] The circumferential wall of the centrifugal air duct includes a volute tongue;

[0121] The centrifugal fan includes a centrifugal motor, the centrifugal motor is connected to the centrifugal fan and drives the centrifugal fan to rotate, and the maximum contour formed by the rotation of the points on the centrifugal fan is the outer contour of the centrifugal fan;

[0122] The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the tenth distance L10, where 4 mm ≤ L10 ≤ 10 mm. This avoids excessive noise caused by too small a distance between the volute tongue and the centrifugal fan, and also 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.

[0123] According to an embodiment of the present disclosure, the centrifugal fan includes:

[0124] A centrifugal volute;

[0125] The centrifugal fan is disposed inside the centrifugal volute;

[0126] 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;

[0127] The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan;

[0128] In the radial direction of the centrifugal fan, the outer contour of the centrifugal fan surrounds the outside of the volute air inlet;

[0129] The distance between the volute air inlet and the outer contour of the centrifugal fan in the radial direction of the centrifugal fan is the eleventh distance L11, where 3 mm ≤ L11 ≤ 20 mm. This can improve the air inlet efficiency, avoid air return, and also ensure that the centrifugal volute shields both ends of the centrifugal fan as much as possible to guarantee the air volume. Description of the Drawings

[0130] Figure 1 is a perspective view of an air conditioner indoor unit according to an embodiment of the present application;

[0131] Figure 2 is a perspective view of the air conditioner indoor unit from another perspective according to an embodiment of the present application;

[0132] Figure 3 is a partial structural diagram of the air conditioner indoor unit according to an embodiment of the present application;

[0133] Figure 4 is a sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0134] Figure 5 is another partial structural diagram of the air conditioner indoor unit according to an embodiment of the present application;

[0135] Figure 6 is a sectional view of the indoor heat exchanger according to an embodiment of the present application;

[0136] Figure 7 is another sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0137] Figure 8 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0138] Figure 9 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0139] Figure 10 It is another partial structure diagram of the air conditioner indoor unit according to an embodiment of the present application;

[0140] Figure 11 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0141] Figure 12 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0142] Figure 13 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0143] Figure 14 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0144] Figure 15 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0145] Figure 16 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0146] Figure 17 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0147] Figure 18 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0148] Figure 19 It is another partial cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0149] Figure 20 It is another partial cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0150] Figure 21 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0151] Figure 22 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application;

[0152] Figure 23 It is a perspective view of the air conditioner indoor unit from another perspective according to an embodiment of the present application;

[0153] Figure 24 It is another cross-sectional view of the air conditioner indoor unit according to an embodiment of the present application.

[0154] In the above figures: the first chamber 101; the housing 1; the indoor air inlet 11; the indoor air outlet 12; the bottom plate 131; the air inlet grille 132; the front panel 133; the first air deflector 134; the second air deflector 135; the indoor heat exchanger 21; the first end of the heat exchanger 2111; the second end of the heat exchanger 2112; the windward surface of the heat exchanger 2113; the contour line of the windward surface 21131; the first sub-windward surface contour line 211311; the first section of the heat exchanger 212; the second section of the heat exchanger 213; the third section of the heat exchanger 214; the centrifugal fan 22; the centrifugal volute 221; the volute air inlet 2211; the volute air duct 2213; the centrifugal fan 222; the outer contour of the centrifugal fan 2221; the centrifugal motor 223; the first side plate 2214; the second side plate 2215; the shroud 2216; the inner wall surface of the shroud 22161; the inner contour line of the shroud 221611; the first contour line of the shroud 2216111; the water receiving tray 23; the air inlet housing 34; the air inlet duct 341; the centrifugal duct 410; the first side wall of the centrifugal duct 411; the second side wall of the centrifugal duct 412; the circumferential wall of the centrifugal duct 413; the volute tongue 4131; the air inlet section of the volute tongue 41311; the air outlet section of the volute tongue 41312; the first air outlet section of the volute tongue 413121; the second air outlet section of the volute tongue 413122; the third air outlet section of the volute tongue 413123; the connecting section of the volute tongue 41313; the contour line of the volute tongue 41314; the contour line of the air inlet section of the volute tongue 413141; the contour line of the air outlet section of the volute tongue 413142; the contour line of the connecting section of the volute tongue 413143; the air outlet plate of the centrifugal duct 4132; the first air outlet plate 41321; the second air outlet plate 41322; the air outlet surface of the centrifugal duct 41323; the contour line of the air outlet surface of the centrifugal duct 413231; the air outlet of the centrifugal duct 414; the ceiling 903; the first opening of the ceiling 9031; the second opening of the ceiling 9032. Detailed Embodiments

[0155] To make the purpose and embodiments of the present application clearer, the following will clearly and completely describe the exemplary embodiments of the present application in conjunction with the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0156] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, rather than intending to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0157] In this application, terms such as "first", "second", "third", etc. in the description, claims and the above-mentioned drawings are used to distinguish similar or like 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.

[0158] The terms "comprising", "having" and any variations thereof are intended to cover but not exclusively include. For example, a product or device comprising a series of components does not necessarily have to be limited to all the components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0159] This application provides an indoor air conditioner, which will be described below with reference to the accompanying drawings.

[0160] In this application, an 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.

[0161] The indoor unit of the air conditioner may be connected to the outdoor unit of the air conditioner.

[0162] 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 corresponding outdoor unit of the indoor unit of the air conditioner in the small space.

[0163] In this application, the indoor unit of the air conditioner may be a wall-mounted indoor unit of the air conditioner.

[0164] In this application, the indoor unit of the air conditioner may be hung on the cavity wall and may be installed against the top wall of the room.

[0165] In this application, the indoor unit of the air conditioner may include a main body.

[0166] 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.

[0167] 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.

[0168] The main body may have a front side and a rear side which 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.

[0169] The height direction, length direction and front-rear direction of the main body are perpendicular to each other.

[0170] 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.

[0171] In the present application, referring to Figures 1 - 4 , the main body may at least include a first chamber 101. The first chamber may be located inside the main body.

[0172] In the present application, the main body may include a housing 1.

[0173] In the present 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 chamber.

[0174] In the present application, the indoor air inlet may be located on the front side of the housing.

[0175] In the present application, referring to Figures 1 - 4 , an indoor air outlet 12 may be formed on the housing. The indoor air outlet may be for the air inside the housing to flow out of the housing. The indoor air outlet may communicate with the first chamber.

[0176] In the present application, the indoor air outlet may be located at the bottom of the housing.

[0177] In the present application, setting the indoor air inlet on the front side of the housing and the indoor air outlet at the bottom of the housing can prevent the air intake and outlet of the indoor air conditioner from being affected when the indoor air conditioner is hung on the wall and installed close to the ceiling, can save indoor space, and enable a wider installation range for the indoor air conditioner.

[0178] In the present application, referring to Figures 1 - 4 , the main body may include an indoor heat exchanger 21. The indoor heat exchanger may be disposed in the first chamber. The indoor heat exchanger may be used for heat exchange with the air in the first chamber.

[0179] In the present application, the main body may include an indoor fan. The indoor fan may be disposed in the first chamber. The indoor fan may be used to provide power for the flow of air.

[0180] In the present application, referring to Figures 1 - 4 , the indoor fan may be a centrifugal fan 22. Setting the indoor fan as a centrifugal fan can enable the indoor air conditioner to have strong static pressure capacity, strong wind resistance capacity, and a long air supply distance.

[0181] In the present application, referring to Figures 4 - 5 , the centrifugal fan 22 may include a centrifugal volute 221.

[0182] In the present application, referring to Figures 4 - 5 , the centrifugal fan may include a centrifugal fan impeller 222. The centrifugal fan impeller may be disposed inside the centrifugal volute.

[0183] In the present application, referring to Figures 4 - 5, the centrifugal fan may include a centrifugal motor 223. The centrifugal motor may be connected to the centrifugal fan. The centrifugal motor may drive the centrifugal fan to rotate.

[0184] In the present application, the indoor heat exchanger may be located on the front side of the centrifugal fan. The indoor heat exchanger may be located on the rear side of the indoor air inlet.

[0185] In the present application, the centrifugal motor drives the centrifugal fan to rotate so that air enters the first chamber from the indoor air inlet to exchange heat with the indoor heat exchanger, and the air after exchanging heat with the indoor heat exchanger flows into the centrifugal volute and then flows out of the centrifugal volute and out of the casing through the indoor air outlet.

[0186] In the present application, a plane perpendicular to the longitudinal direction of the main body is defined as the first plane.

[0187] In the present application, the indoor heat exchanger may be in one section. The indoor heat exchanger may have a width direction.

[0188] In the present application, the width direction of the indoor heat exchanger is parallel to or lies in the first plane.

[0189] Reference Figures 4 - 5 , the indoor heat exchanger may include a first heat exchanger end 2111 and a second heat exchanger end 2112 which are oppositely arranged in its width direction.

[0190] In the height direction of the main body, the second heat exchanger end may be located on the side of the first heat exchanger end close to the bottom of the main body.

[0191] Along the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped or zigzag-shaped, and the indoor heat exchanger bulges toward the side close to the indoor air inlet.

[0192] In the width direction of the indoor heat exchanger, defining the indoor heat exchanger as arc-shaped or zigzag-shaped can increase the heat exchange 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 exchange 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.

[0193] In the present application, a plane perpendicular to the height direction of the main body is defined as the second plane.

[0194] In the present application, reference Figures 4 - 6 , the indoor heat exchanger includes a heat exchanger windward surface 2113 on the side away from the centrifugal fan.

[0195] The heat exchanger windward surface includes a windward surface contour line 21131 extending along the width direction of the indoor heat exchanger. The length of the windward surface contour line is the first length W1.

[0196] The windward profile line includes a first sub - windward profile line 211311. The angle between the tangent of the first sub - windward profile line and the second plane is the first angle α1.

[0197] In this application, α1 ≥ the first parameter value. The first parameter value can be any value between 40° and 50°. The first parameter value can be 45°. α1 ≥ 45°. This makes the first sub - windward profile line inclined enough so that the condensed water on the part of the first sub - windward profile line corresponding to the indoor heat exchanger can flow down quickly, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger; it can reduce the distance of the indoor heat exchanger in the front - rear direction of the main body, reduce the size in the front - rear direction of the main body, increase the installation range of the air - conditioner indoor unit, and enable the air - conditioner indoor unit to be installed in small spaces such as kitchens.

[0198] In this application, the mid - point of the windward profile line is located on the first sub - windward profile line.

[0199] The length of the contour line between the vertex of the first sub - windward profile line and the mid - point of the windward profile line is the second length W2. The length of the contour line between the lowest point of the first sub - windward profile line and the mid - point of the windward profile line is the third length W3.

[0200] In this application, W2 / W1 ≥ the second parameter value. The second parameter value can be any value between 1 / 5 and 3 / 10. The second parameter value can be 1 / 4. W2 / W1 ≥ 1 / 4. This makes the area where the indoor heat exchanger is inclined enough larger, ensuring the performance of a larger area of the indoor heat exchanger.

[0201] In this application, W2 / W1 ≤ the third parameter value. The third parameter value can be any value between 7 / 20 and 3 / 5. The third parameter value can be 2 / 5. W2 / W1 ≤ 2 / 5. Avoiding the area where the indoor heat exchanger is inclined enough from being too large, minimizing the size of the main body in the height direction and increasing the installation and use range of the air - conditioner indoor unit.

[0202] In this application, 1 / 4 ≤ W2 / W1 ≤ 2 / 5, making the area where the indoor heat exchanger is inclined enough appropriate, minimizing the size of the main body in the height direction, increasing the installation and use range of the air - conditioner indoor unit, and ensuring the performance of this part of the indoor heat exchanger.

[0203] In this application, W3 / W1 ≥ the fourth parameter value. The fourth parameter value can be any value between 1 / 5 and 3 / 10. The fourth parameter value can be 1 / 4. W3 / W1 ≥ 1 / 4. This makes the area where the indoor heat exchanger is inclined enough larger, ensuring the performance of a larger area of the indoor heat exchanger.

[0204] In this application, W3 / W1 ≤ the fifth parameter value. The fifth parameter value can be any value between 7 / 20 - 3 / 5. The fifth parameter value can be 2 / 5. W3 / W1 ≤ 2 / 5. Avoiding an overly large area where the indoor heat exchanger is sufficiently inclined, minimizing the size of the main body in the height direction, and improving the installation and usage range of the air conditioner indoor unit.

[0205] In this application, 1 / 4 ≤ W3 / W1 ≤ 2 / 5, making the area where the indoor heat exchanger is sufficiently inclined appropriate, minimizing the size of the main body in the height direction, improving the installation and usage range of the air conditioner indoor unit, and ensuring the performance of this part of the indoor heat exchanger.

[0206] In this application, when the centrifugal fan rotates, the diameter of the maximum contour formed by the points on the centrifugal fan is the maximum diameter D1 of the centrifugal fan. In the height direction of the main body, the height difference between the rotation axis of the centrifugal fan and the center of the indoor heat exchanger is the first distance L1.

[0207] In this application, referring to Figure 7 , L1 / D1 ≤ the sixth parameter value. The sixth parameter value can be any value between 1 / 3 - 1 / 2. The sixth parameter value can be 1 / 2. L1 / D1 ≤ 1 / 2. It can make the distance between the rotation axis of the centrifugal fan and the center of the indoor heat exchanger in the height direction of the main body smaller, making the centrifugal fan and the indoor heat exchanger as directly opposed as possible, enabling the air passing through the indoor heat exchanger to be more uniform, improving the heat exchange effect of the indoor heat exchanger, and reducing the condensation problem caused by local overcooling or overheating of the indoor heat exchanger.

[0208] In this application, referring to Figure 7 , the minimum distance between the first end of the heat exchanger and the centrifugal volute is the second distance L2.

[0209] In this application, L2 ≤ the seventh parameter value. The seventh parameter value can be any value between 28 mm - 30 mm. The seventh parameter value can be 30 mm. L2 ≤ 30 mm. It can avoid the main body having an overly large front - rear dimension caused by an overly large distance between the first end of the heat exchanger and the centrifugal volute, improve the applicability of the air conditioner indoor unit, be able to be installed in small spaces such as kitchens, and be able to be installed in the space at the top of a door or window.

[0210] In this application, L2 ≥ 0 mm, so that the indoor heat exchanger is located in front of the centrifugal fan.

[0211] In this application, referring to Figure 7 , the minimum distance between the second end of the heat exchanger and the centrifugal volute is the third distance L3.

[0212] In this application, L3 ≤ the eighth parameter value. The eighth parameter value can be any value in the range of 28 mm - 30 mm. The eighth parameter value can be 30 mm. L3 ≤ 30 mm. This can avoid the problem of excessive overall front-back dimensions caused by an overly large distance between the second end of the heat exchanger and the centrifugal volute, improve the applicability of the air conditioner indoor unit, enable it to be installed in small spaces such as kitchens, and can be installed in the space above a door or window.

[0213] In this application, L3 ≥ 0 mm, such that the indoor heat exchanger is located in front of the centrifugal fan.

[0214] In this application, referring to Figure 8 , the indoor heat exchanger may include a first-section heat exchanger 212. The first-section heat exchanger has a width direction. The top end and the bottom end of the first-section heat exchanger are the two ends in the width direction of the first-section heat exchanger.

[0215] In the front-back direction of the main body, the bottom end of the first-section heat exchanger is located in front of the top end of the first-section heat exchanger.

[0216] In this application, the width direction of the first-section heat exchanger is parallel to or lies within the first plane.

[0217] In this application, referring to Figure 8 , the indoor heat exchanger may include a second-section heat exchanger 213. The second-section heat exchanger may have a width direction. The top end and the bottom end of the second-section heat exchanger may be the two ends in the width direction of the second-section heat exchanger.

[0218] In the front-back direction of the main body, the top end of the second-section heat exchanger is located in front of the bottom end of the second-section heat exchanger.

[0219] In this application, the width direction of the second-section heat exchanger is parallel to or lies within the first plane.

[0220] In this application, referring to Figure 8 , the indoor heat exchanger may include a third-section heat exchanger 214. The third-section heat exchanger may have a width direction. The top end and the bottom end of the third-section heat exchanger may be the two ends in the width direction of the third-section heat exchanger.

[0221] In this application, the top end of the third-section heat exchanger is connected to the bottom end of the first-section heat exchanger.

[0222] In this application, the bottom end of the third-section heat exchanger is connected to the top end of the second-section heat exchanger.

[0223] In this application, the width direction of the third-section heat exchanger is parallel to or lies within the first plane.

[0224] In this application, the width direction of the first-stage heat exchanger is arranged at an angle with the second plane. The angle between the width direction of the first-stage heat exchanger and the second plane is the second angle α2.

[0225] In this application, α2 ≥ the ninth parameter value. The ninth parameter value can be any value between 35° and 45°. The ninth parameter value can be 40°. α2 ≥ 40°. This can reduce the front-back size of the main body while the first-stage heat exchanger has a certain heat exchange area. At the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0226] In this application, referring to Figure 8 , the width direction of the second-stage heat exchanger is arranged at an angle with the second plane. The angle between the width direction of the second-stage heat exchanger and the second plane is the third angle α3.

[0227] In this application, α3 ≥ the tenth parameter value. The tenth parameter value can be any value in the range of 35° - 45°. The tenth parameter value can be 40°. α3 ≥ 40°. This can reduce the front-back size of the main body while the second-stage heat exchanger has a certain heat exchange area. At the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0228] In this application, α3 ≤ the eleventh parameter value. The eleventh parameter value can be any value in the range of 65° - 75°. The eleventh parameter value can be 70°. α3 ≤ 70°. This can reduce the height size of the main body while the second-stage heat exchanger has a certain heat exchange area, and it can be installed in small spaces such as kitchens and can be installed above doors or windows.

[0229] In this application, referring to Figure 8 , the width direction of the third-stage heat exchanger is arranged at an angle with the second plane. The angle between the width direction of the third-stage heat exchanger and the second plane is the fourth angle α4.

[0230] In this application, α4 ≥ the twelfth parameter value. The twelfth parameter value can be any value in the range of 65° - 75°. The twelfth parameter value can be 70°. α4 ≥ 70°. This can reduce the front-back size of the main body while the third-stage heat exchanger has a certain heat exchange area. At the same time, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0231] In this application, α4 ≤ the value of the thirteenth parameter. The value of the thirteenth parameter can be any value in the range of 105° - 115°. The value of the thirteenth parameter can be 110°. α4 ≤ 110°. This can reduce the front - rear size of the main body while the third - stage heat exchanger has a certain heat - exchange area; meanwhile, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0232] In this application, it is set that α2 ≥ 40°, 70° ≤ α4 ≤ 110°, and 40° ≤ α3 ≤ 70°. This can, while keeping the height dimension of the main body unchanged, increase the heat - exchange area as much as possible and significantly reduce the front - rear size of the main body. It can reduce costs, make the installation environment of the main body more flexible, and can be installed in small spaces such as kitchens and can be installed above doors or windows; meanwhile, it is beneficial for the condensed water on the indoor heat exchanger to flow down, avoiding the attenuation effect of the condensed water on the performance of the indoor heat exchanger.

[0233] In this application, referring to Figure 9 , the included angle between the width direction of the first - stage heat exchanger and the width direction of the third - stage heat exchanger is the fifth included angle α5.

[0234] In this application, α5 < the value of the fourteenth parameter. The value of the fourteenth parameter can be any value between 160° - 180°. The value of the fourteenth parameter can be 180°. α5 < 180°. This makes the included angle between the first - stage heat exchanger and the third - stage heat exchanger face the centrifugal fan, and can reduce the size of the main body in the front - rear direction, improving the installation application range of the air - conditioner indoor unit.

[0235] In this application, α5 ≥ the value of the fifteenth parameter. The value of the fifteenth parameter can be any value between 90° - 110°. The value of the fifteenth parameter can be 90°. α5 > 90°. This avoids the opening between the width direction of the first - stage heat exchanger and the width direction of the third - stage heat exchanger from being too small, avoiding affecting the amount of air passing through the first - stage heat exchanger and the third - stage heat exchanger, and can reduce the size of the main body in the front - rear direction, improving the installation application range of the air - conditioner indoor unit.

[0236] In this application, referring to Figure 9 , the included angle between the width direction of the third - stage heat exchanger and the width direction of the second - stage heat exchanger is the sixth included angle α6.

[0237] In this application, α6 < the value of the sixteenth parameter. The value of the sixteenth parameter can be any value between 160° - 180°. The value of the sixteenth parameter can be 180°. α6 < 180°. This makes the included angle between the second - stage heat exchanger and the third - stage heat exchanger face the centrifugal fan, and can reduce the size of the main body in the front - rear direction, improving the installation application range of the air - conditioner indoor unit.

[0238] In this application, α6 ≥ the seventeenth parameter value. The seventeenth parameter value can be any value between 90° and 110°. The seventeenth parameter value can be 90°. α6 > 90°. This can prevent the openings in the width directions of the second heat exchanger and the third heat exchanger from being too small, avoid affecting the amount of air passing through the second heat exchanger and the third heat exchanger, and can reduce the size of the main body in the front-rear direction, improving the installation applicability range of the air conditioner indoor unit.

[0239] In this application, 90° < α5 < 180°, 90° < α6 < 180°. This can make the opening of the indoor heat exchanger face the centrifugal fan, avoid the opening of the indoor heat exchanger from being too small, avoid affecting the amount of air passing through the indoor heat exchanger, and can reduce the size of the main body in the front-rear direction, improving the installation applicability range of the air conditioner indoor unit.

[0240] In this application, it is provided that the indoor heat exchanger includes a first heat exchanger, a second heat exchanger, and a third heat exchanger, 90° < α5 < 180°, 90° < α6 < 180°. This can increase the heat exchanger area of the indoor heat exchanger under the condition that the height dimension and the front-rear dimension of the main body are relatively determined, improving the heat exchange effect; on the premise of ensuring the heat exchanger area, it can appropriately reduce the height dimension and the front-rear dimension of the main body, can improve the installation and use range of the air conditioner indoor unit, can enable the air conditioner indoor unit to be installed in small spaces such as kitchens, and can be installed in places with a relatively small height such as door bodies or windows.

[0241] In this application, refer to Figure 10 , the centrifugal fan includes a centrifugal volute 221. A volute air inlet 2211 is formed on the centrifugal volute. A volute air duct 2213 is formed inside the centrifugal volute. The volute air inlet is communicated with the volute air duct. The centrifugal fan is arranged in the volute air duct.

[0242] In this application, the volute air inlet 2211 can be arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0243] In this application, refer to Figure 11 , the minimum distance between the first heat exchanger and the volute air inlet is the fourth distance L4.

[0244] In this application, L4 ≥ the eighteenth parameter value. The eighteenth parameter value can be any value between 6 mm and 10 mm. The eighteenth parameter value can be 8 mm. L4 ≥ 8 mm. This can prevent the distance between the first heat exchanger and the volute air inlet from being too small and avoid generating noise.

[0245] In this application, L4 ≤ the value of the nineteenth parameter. The value of the nineteenth parameter can be any value between 28 mm and 32 mm. The value of the nineteenth parameter can be 30 mm. L4 ≤ 30 mm. This can avoid too large a distance between the first-stage heat exchanger and the air inlet of the volute, prevent the reduction of air volume and heat exchange efficiency, and avoid too large a size in the front-back direction of the main body, facilitating the installation of the air conditioner indoor unit and saving costs.

[0246] In this application, 8 mm ≤ L4 ≤ 30 mm, which can avoid too small a distance between the first-stage heat exchanger and the air inlet of the volute, prevent noise generation, and can also avoid too large a distance between the first-stage heat exchanger and the air inlet of the volute, prevent the reduction of air volume and heat exchange efficiency, avoid too large a size in the front-back direction of the main body, facilitate the installation of the air conditioner indoor unit and save costs.

[0247] In this application, referring to Figure 11 , the minimum distance between the second-stage heat exchanger and the air inlet of the volute is the fifth distance L5.

[0248] In this application, L5 ≥ the value of the twentieth parameter. The value of the twentieth parameter can be any value between 6 mm and 10 mm. The value of the twentieth parameter can be 8 mm. L5 ≥ 8 mm. This can avoid too small a distance between the second-stage heat exchanger and the air inlet of the volute, preventing noise generation.

[0249] In this application, L5 ≤ the value of the twenty-first parameter. The value of the twenty-first parameter can be any value between 28 mm and 32 mm. The value of the twenty-first parameter can be 30 mm. L5 ≤ 30 mm. This can avoid too large a distance between the second-stage heat exchanger and the air inlet of the volute, prevent the reduction of air volume and heat exchange efficiency, and avoid too large a size in the front-back direction of the main body, facilitating the installation of the air conditioner indoor unit and saving costs.

[0250] In this application, 8 mm ≤ L5 ≤ 30 mm, which can avoid too small a distance between the second-stage heat exchanger and the air inlet of the volute, prevent noise generation, and can also avoid too large a distance between the second-stage heat exchanger and the air inlet of the volute, prevent the reduction of air volume and heat exchange efficiency, avoid too large a size in the front-back direction of the main body, facilitate the installation of the air conditioner indoor unit and save costs.

[0251] In this application, the plane passing through the rotation axis of the centrifugal fan and perpendicular to the front-back direction of the main body is defined as the third plane.

[0252] In this application, the second-stage heat exchanger is located on the side of the third plane close to the indoor air inlet.

[0253] In this application, the minimum distance between the second-stage heat exchanger and the third plane is the sixth distance L6.

[0254] In this application, L6 ≤ the value of the twenty-second parameter. The value of the twenty-second parameter can be any value between 18 mm and 22 mm. The value of the twenty-second parameter can be 20 mm. L6 ≤ 20 mm. This can prevent the distance between the second heat exchanger and the third plane from being too large, avoid excessive dimensions in the front-back direction of the main body, facilitate the installation of the air conditioner indoor unit, and save costs.

[0255] In this application, the centrifugal fan may include a centrifugal volute 221.

[0256] In this application, a volute air inlet 2211 may be formed on the centrifugal volute.

[0257] In this application, the volute air inlet may be provided on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0258] In this application, a volute air duct may be formed inside the centrifugal volute. The volute air duct may communicate with the volute air inlet. The centrifugal fan may be disposed inside the volute air duct.

[0259] In this application, the centrifugal volute 221 may include a first side plate 2214. The centrifugal volute 221 may include a second side plate 2215.

[0260] The first side plate and the second side plate may be disposed opposite to each other. The first side plate and the second side plate may be located on both sides of the centrifugal fan in the axial direction.

[0261] In this application, the volute air inlet may be located on the first side plate and the second side plate.

[0262] In this application, the centrifugal fan may include a shroud 2216. The shroud may be disposed between the first side plate and the second side plate. The shroud may surround the outside of the centrifugal fan.

[0263] In this application, the shroud, the first side plate, and the second side plate are connected to enclose the volute air duct.

[0264] In this application, a centrifugal air duct 410 is formed inside the main body. The centrifugal fan may be disposed inside the centrifugal air duct.

[0265] In this application, the centrifugal air duct may include a volute air duct 2213. The centrifugal fan may be disposed inside the volute air duct.

[0266] In this application, a volute air inlet 2211 may be formed on the main body. The volute air inlet may communicate with the centrifugal air duct. The volute air inlet is formed on the centrifugal volute.

[0267] In this application, a centrifugal air duct outlet 414 may be formed on the main body. The centrifugal air duct outlet 414 may communicate with the centrifugal air duct. The centrifugal air duct outlet 414 may be located at the bottom end of the centrifugal air duct.

[0268] In this application, with reference to Figure 12 , the main body may include the first side wall 411 of the centrifugal air duct. The main body may include the second side wall 412 of the centrifugal air duct. The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct may be located on both sides of the axis of the centrifugal fan.

[0269] In this application, the first side wall of the centrifugal air duct may include the first side plate 2214. The second side wall of the centrifugal air duct may include the second side plate 2215.

[0270] In this application, a volute air inlet may be formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct.

[0271] In this application, the main body may include the circumferential wall 413 of the centrifugal air duct. The circumferential wall 413 of the centrifugal air duct may be provided between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct.

[0272] The circumferential wall 413 of the centrifugal air duct may surround the outside of the centrifugal fan.

[0273] In this application, the circumferential wall 413 of the centrifugal air duct may include the shroud 2216.

[0274] In this application, the first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct, and the circumferential wall 413 of the centrifugal air duct enclose the centrifugal air duct 410.

[0275] In this application, an outlet of the centrifugal air duct is defined between two opposite ends of the circumferential wall of the centrifugal air duct along the circumferential direction of the centrifugal fan.

[0276] In this application, the outlet of the centrifugal air duct may be located at the bottom end of the centrifugal air duct.

[0277] In this application, the circumferential wall 413 of the centrifugal air duct may include the volute tongue 4131. The outlet of the centrifugal air duct may be located at the bottom end of the volute tongue. The bottom end of the volute tongue may be located at the front end of the outlet of the centrifugal air duct.

[0278] In this application, the point on the second-stage heat exchanger closest to the rear end of the main body is the last point of the second-stage heat exchanger.

[0279] In the front-rear direction of the main body, the last point of the second-stage heat exchanger is located behind the bottom end of the volute tongue.

[0280] With reference to Figure 13 , in the front-rear direction of the main body, the distance between the last point of the second-stage heat exchanger and the bottom end of the volute tongue is the seventh distance L7.

[0281] In this application, L7 ≥ the twenty-eighth parameter value. The twenty-eighth parameter value may be any value between 4 mm and 5 mm. The twenty-eighth parameter value may be 5 mm. L7 ≥ 5 mm. This can make the front-rear dimension of the main body smaller, facilitate the installation of the air-conditioning indoor unit, and save costs.

[0282] In the present application, L7 ≤ the value of the twenty-ninth parameter. The value of the twenty-ninth parameter can be any value between 8 mm and 12 mm. The value of the twenty-ninth parameter can be 10 mm. L7 ≤ 10 mm. This can avoid an excessive seventh distance, prevent the second-stage heat exchanger from being too close to the centrifugal fan, avoid noise, or prevent the air outlet duct of the centrifugal air duct from being too long.

[0283] In the present application, 5 mm ≤ L7 ≤ 10 mm, which can prevent the second-stage heat exchanger from being too close to the centrifugal fan, avoid noise, and can make the front and rear dimensions of the main body smaller, facilitating the installation of the air conditioner indoor unit and saving costs.

[0284] In the present application, referring to Figure 14 , the indoor heat exchanger may include a first-stage heat exchanger 212. The first-stage heat exchanger has a width direction. The top end and the bottom end of the first-stage heat exchanger are the two ends in the width direction of the first-stage heat exchanger.

[0285] In the present application, the width direction of the first-stage heat exchanger is parallel to or lies within the first plane.

[0286] In the present application, in the front-rear 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.

[0287] In the present application, referring to Figure 14 , the indoor heat exchanger may include a second-stage heat exchanger 213. The second-stage heat exchanger may have a width direction. The top end and the bottom end of the second-stage heat exchanger may be the two ends in the width direction of the second-stage heat exchanger.

[0288] In the present application, the width direction of the second-stage heat exchanger is parallel to or lies within the first plane.

[0289] In the present application, in the front-rear direction of the main body, the top end of the second-stage heat exchanger is in front of the bottom end of the second-stage heat exchanger. The top end of the second-stage heat exchanger is connected to the bottom end of the first-stage heat exchanger.

[0290] In the present application, referring to Figure 14 , the included angle between the width direction of the first-stage heat exchanger and the second plane is the second included angle α2.

[0291] In the present application, α2 < the value of the twenty-third parameter. The value of the twenty-third parameter can be any value between 30° and 45°. The value of the twenty-third parameter can be 45°. α2 < 45°. This can increase the heat exchange area of the indoor heat exchanger while reducing the height dimension of the main body, enabling installation in small spaces such as kitchens and can be installed above doors or windows.

[0292] In the present application, referring to Figure 14, the included angle between the width direction of the second heat exchanger and the second plane is the third included angle α3.

[0293] In the present application, α3 < the twenty-fourth parameter value. The twenty-fourth parameter value can be any value within 30° - 45°. The twenty-fourth parameter value can be 45°. α3 < 45°. It can increase the heat exchange area of the indoor heat exchanger while reducing the overall height dimension, and can be installed in small spaces such as kitchens, and can be installed above doors or windows.

[0294] In the present application, α3 < 45° and α2 < 45°. It can increase the heat exchange area of the indoor heat exchanger while reducing the overall height dimension, and can be installed in small spaces such as kitchens, and can be installed above doors or windows.

[0295] In the present application, refer to Figure 14 , the minimum distance between the first heat exchanger and the volute air inlet is the fourth distance L4.

[0296] In the present application, L4 ≥ the eighteenth parameter value. The eighteenth parameter value can be any value within 6 mm - 10 mm. The eighteenth parameter value can be 8 mm. L4 ≥ 8 mm. It can avoid the distance between the first heat exchanger and the volute air inlet being too small, thus avoiding noise generation.

[0297] In the present application, L4 ≤ the nineteenth parameter value. The nineteenth parameter value can be any value within 28 mm - 32 mm. The nineteenth parameter value can be 30 mm. L4 ≤ 30 mm. It can avoid the distance between the first heat exchanger and the volute air inlet being too large, thus avoiding a reduction in air volume and heat exchange efficiency, and avoiding an excessive size in the front-back direction of the main body, facilitating the installation of the air conditioner indoor unit and saving costs.

[0298] In the present application, 8 mm ≤ L4 ≤ 30 mm. It can avoid the distance between the first heat exchanger and the volute air inlet being too small, thus avoiding noise generation, and can avoid the distance between the first heat exchanger and the volute air inlet being too large, thus avoiding a reduction in air volume and heat exchange efficiency, avoiding an excessive size in the front-back direction of the main body, facilitating the installation of the air conditioner indoor unit and saving costs.

[0299] In the present application, refer to Figure 14 , the minimum distance between the second heat exchanger and the volute air inlet is the fifth distance L5.

[0300] In the present application, L5 ≥ the twentieth parameter value. The twentieth parameter value can be any value within 6 mm - 10 mm. The twentieth parameter value can be 8 mm. L5 ≥ 8 mm. It can avoid the distance between the second heat exchanger and the volute air inlet being too small, thus avoiding noise generation.

[0301] In this application, L5 ≤ the value of the twenty - first parameter. The value of the twenty - first parameter can be any value between 28 mm and 32 mm. The value of the twenty - first parameter can be 30 mm. L5 ≤ 30 mm. This can avoid too large a distance between the second - stage heat exchanger and the air inlet of the volute, prevent the reduction of air volume and heat exchange efficiency, and avoid too large a size of the main body in the front - rear direction, which is convenient for installing the air - conditioner indoor unit and saves costs.

[0302] In this application, 8 mm ≤ L5 ≤ 30 mm. This can avoid too small a distance between the second - stage heat exchanger and the air inlet of the volute, prevent the generation of noise, and can also avoid too large a distance between the second - stage heat exchanger and the air inlet of the volute, prevent the reduction of air volume and heat exchange efficiency, avoid too large a size of the main body in the front - rear direction, which is convenient for installing the air - conditioner indoor unit and saves costs.

[0303] In this application, referring to Figure 15 , the indoor heat exchanger may include a first - stage heat exchanger 212. The first - stage heat exchanger has a width direction. The top end and the bottom end of the first - stage heat exchanger are the two ends in the width direction of the first - stage heat exchanger.

[0304] In this application, the width direction of the first - stage heat exchanger is parallel to or lies within the first plane.

[0305] In this application, referring to Figure 15 , the indoor heat exchanger may include a second - stage heat exchanger 213. The second - stage heat exchanger may have a width direction. The top end and the bottom end of the second - stage heat exchanger may be the two ends in the width direction of the second - stage heat exchanger.

[0306] In this application, the width direction of the second - stage heat exchanger is parallel to or lies within the first plane.

[0307] In this application, in the front - rear direction of the main body, the top end of the second - stage heat exchanger is in front of the bottom end of the second - stage heat exchanger. The top end of the second - stage heat exchanger is connected to the bottom end of the first - stage heat exchanger.

[0308] In this application, referring to Figure 15 , the included angle between the width direction of the first - stage heat exchanger and the second plane may be the second included angle α2.

[0309] In this application, the second included angle α2 ≥ the value of the twenty - fifth parameter. The twenty - fifth value can be any value between 45° and 70°. The value of the twenty - fifth parameter can be 45°. The second included angle α2 ≥ 45°. This makes the inclination of the first - stage heat exchanger large enough so that the condensed water on the first - stage heat exchanger can flow down quickly, avoiding the attenuation of the performance of the first - stage heat exchanger caused by the condensed water.

[0310] In this application, referring to Figure 15, the included angle between the width direction of the second-stage heat exchanger and the second plane is the third included angle α3.

[0311] In the present application, the third included angle α3 ≥ the twenty-sixth parameter value. The twenty-sixth parameter value can be any value between 45° and 50°. The twenty-sixth parameter value can be 45°. The third included angle α3 ≥ 45°. This makes the inclination of the second-stage heat exchanger large enough so that the condensed water on the second-stage heat exchanger can flow down quickly, avoiding the attenuation of the performance of the second-stage heat exchanger caused by the condensed water.

[0312] In the present application, the second included angle α2 ≥ 45° and the third included angle α3 ≥ 45°, making the inclination of the first-stage heat exchanger large enough so that the condensed water on the first-stage heat exchanger can flow down quickly, avoiding the attenuation of the performance of the first-stage heat exchanger caused by the condensed water, making the inclination of the second-stage heat exchanger large enough so that the condensed water on the second-stage heat exchanger can flow down quickly, avoiding the attenuation of the performance of the second-stage heat exchanger caused by the condensed water; and it can increase the heat exchange area of the indoor heat exchanger within a certain range of the main body height, improve the heat exchange effect, and can reduce the front and rear dimensions of the main body when the heat exchange area is certain, can improve the applicability of the air conditioner indoor unit, can be installed in small spaces such as kitchens, and can be installed in the space at the top of a door or window.

[0313] In the present application, refer to Figure 15 , the included angle between the width direction of the first-stage heat exchanger and the width direction of the second-stage heat exchanger is the seventh included angle α7. The opening direction of the fourth included angle faces the centrifugal fan.

[0314] In the present application, α7 < the twenty-seventh parameter value. The twenty-seventh parameter value can be any value between 150° and 180°. The twenty-seventh parameter value can be 180°. α7 < 180°. This can avoid the top end of the second-stage heat exchanger being too close to the indoor air outlet due to the excessive seventh included angle, can reduce the space occupied by the indoor heat exchanger in the front and rear directions of the main body, can reduce the front and rear dimensions of the main body, improve the applicability of the air conditioner indoor unit, and can be installed in small spaces such as kitchens.

[0315] Setting the indoor heat exchanger to include the first-stage heat exchanger and the second-stage heat exchanger, with α2 ≥ 45°, α3 ≥ 45°, and α7 < 180°, can increase the heat exchanger area of the indoor heat exchanger when the main body height dimension is relatively determined, improve the heat exchange effect; can appropriately reduce the front and rear dimensions of the main body on the premise of ensuring the heat exchanger area, can improve the installation and use range of the air conditioner indoor unit, can enable the air conditioner indoor unit to be installed in small spaces such as kitchens, and can be installed in places with a relatively small height such as door bodies or windows; making the inclination of the first-stage heat exchanger and the second-stage heat exchanger large enough so that the condensed water on the indoor heat exchanger can flow down quickly, avoiding the attenuation of the performance of the indoor heat exchanger caused by the condensed water.

[0316] In this application, referring to Figure 16 , the indoor heat exchanger has a width direction. The two ends in the width direction of the indoor heat exchanger are the top end and the bottom end of the indoor heat exchanger. The indoor heat exchanger is a single section.

[0317] In this application, the width direction of the indoor heat exchanger is parallel to or lies within the first plane.

[0318] In this application, referring to Figure 16 , in the front - rear direction of the main body, the top end of the indoor heat exchanger is in front of the bottom end of the indoor heat exchanger. The included angle between the width direction of the indoor heat exchanger and the second plane is the eighth included angle α8.

[0319] In this application, α8≥the thirtieth parameter value. The thirtieth parameter value can be any value between 45° and 55°. The thirtieth parameter value can be 45°. α8≥45°. This can avoid the inclination angle of the indoor heat exchanger being too small, enabling the air conditioner indoor unit to have a sufficient inclination angle, facilitating the drainage of condensed water on the indoor heat exchanger, and avoiding the attenuation of the performance of the air conditioner indoor unit caused by condensed water.

[0320] In this application, the centrifugal fan includes a centrifugal volute. The centrifugal fan is arranged inside the centrifugal volute. A volute air inlet is formed on the centrifugal volute. The volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0321] In this application, referring to Figure 16 , the minimum distance between the indoor heat exchanger and the volute air inlet is the eighth distance L8.

[0322] In this application, L8≥the thirty - first parameter value. The thirty - first parameter value can be any value between 6 mm and 10 mm. The thirtieth parameter value can be 8 mm. L8≥8 mm. This can avoid the distance between the indoor heat exchanger and the volute air inlet being too small and avoid generating noise.

[0323] In this application, L8≤the thirty - second parameter value. The thirty - second parameter value can be any value between 28 mm and 32 mm. The thirty - second parameter value can be 30 mm. L8≤30 mm. This can avoid the distance between the indoor heat exchanger and the volute air inlet being too large, avoid reducing the air volume and heat exchange efficiency, and avoid causing the size of the main body in the front - rear direction to be too large, facilitating the installation of the air conditioner indoor unit and saving costs.

[0324] In this application, 8 mm≤L8≤30 mm, which can avoid abnormal noise caused by the close distance between the indoor heat exchanger and the volute air inlet, and avoid the large size of the main body in the front - rear direction caused by the large distance between the indoor heat exchanger and the volute air inlet, affecting the installation and application range of the indoor heat exchanger.

[0325] In this application, referring to Figure 16, a centrifugal fan is disposed within a centrifugal volute. A centrifugal motor is connected to the centrifugal fan. The centrifugal motor drives the centrifugal fan to rotate. When the centrifugal fan rotates, the diameter of the maximum contour formed by the rotation of 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.

[0326] In the present application, L1 / D1 ≤ the fifth parameter value. The fifth parameter value can be any value between 1 / 3 - 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, enabling the centrifugal fan and the indoor heat exchanger to be as directly opposed as possible, making the air passing through the indoor heat exchanger more uniform, improving the heat exchange effect of the indoor heat exchanger, and alleviating the condensation problem caused by local overcooling or overheating of the indoor heat exchanger.

[0327] In the present application, the peripheral wall 413 of the centrifugal air duct may include an air outlet plate 4132 of the centrifugal air duct. The air outlet plate 4132 of the centrifugal air duct may be spaced apart from the volute tongue.

[0328] The air outlet plate 4132 of the centrifugal air duct may be located behind the volute tongue. The air outlet of the centrifugal air duct may be formed at the bottom end of the air outlet plate of the centrifugal air duct.

[0329] The bottom end of the volute tongue and the bottom end of the air outlet plate of the centrifugal air duct define an air outlet of the centrifugal air duct located between the volute tongue and the air outlet plate of the centrifugal air duct.

[0330] In the present application, the bottom end of the air outlet plate of the centrifugal air duct is located at the rear end of the air outlet of the centrifugal air duct.

[0331] In the present application, refer to Figure 17 , the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct may be the ninth distance L9.

[0332] In the present application, the air outlet plate of the centrifugal air duct may include a first point A1. The minimum distance between the first point A1 and the volute tongue is the ninth distance L9.

[0333] The first point A may be located between the top end and the bottom end of the air outlet plate of the centrifugal air duct.

[0334] In the present application, when the centrifugal fan rotates, the diameter of the maximum contour formed by the rotation of the points on the centrifugal fan is the maximum diameter D1 of the centrifugal fan.

[0335] In this application, L9 / D1 ≥ the thirty-third parameter value. The thirty-third parameter value can be any value between 1 / 4 and 3 / 8. The thirty-third parameter value can be 1 / 3. L9 / D1 ≥ 1 / 3. This can ensure that the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct is not too small relative to the maximum diameter of the centrifugal fan, and can guarantee the air volume output of the centrifugal fan.

[0336] In this application, L9 / D1 ≤ the thirty-fourth parameter value. The thirty-fourth parameter value can be any value between 5 / 12 and 2 / 3. The thirty-fourth parameter value can be 1 / 2. L9 / D1 ≤ 1 / 2. This can ensure that the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct is not too large relative to the maximum diameter of the centrifugal fan, and can guarantee the air outlet pressure of the centrifugal fan.

[0337] In this application, 1 / 3 ≤ L9 / D1 ≤ 1 / 2, which can prevent the minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct from being too large or too small relative to the maximum diameter of the centrifugal fan, and can guarantee the air volume output and air outlet pressure of the centrifugal fan.

[0338] In this application, the peripheral wall of the centrifugal air duct includes a volute tongue 4131.

[0339] In this application, the centrifugal fan includes a centrifugal motor. The centrifugal motor is connected to the centrifugal fan. The centrifugal motor drives the centrifugal fan to rotate. The maximum contour formed by the points on the centrifugal fan during rotation is the outer contour of the centrifugal fan.

[0340] The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the tenth distance L10.

[0341] In this application, L10 ≥ the thirty-fifth parameter value. The thirty-fifth parameter value can be any value between 3 mm and 5 mm. The thirty-fifth 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.

[0342] In this application, L10 ≤ the thirty-sixth parameter value. The thirty-sixth parameter value can be any value between 8 mm and 12 mm. The thirty-sixth 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 can guarantee the air volume output.

[0343] In this application, 4 mm ≤ L10 ≤ 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 can guarantee the air volume output.

[0344] In this application, the main body may include a water receiving tray 23. The water receiving tray 23 can be arranged in the first cavity. The water receiving tray can be arranged below the indoor heat exchanger to receive the condensed water flowing down from the indoor heat exchanger.

[0345] In the present application, with reference to Figure 18 , the volute tongue may include a volute tongue air inlet section 41311. The volute tongue may include a volute tongue air outlet section 41312. The volute tongue may include a volute tongue connection section 41313.

[0346] The volute tongue air outlet section may be located at the bottom end of the volute tongue. The centrifugal air duct air outlet may be located at the bottom end of the volute tongue air outlet section.

[0347] The volute tongue connection section may be connected between the volute tongue air inlet section and the volute tongue air outlet section.

[0348] In the present application, the centrifugal volute may include a volute tongue air inlet section. The shroud may include a volute tongue air inlet section.

[0349] In the present application, the centrifugal volute may include a volute tongue connection section. The shroud may include a volute tongue connection section.

[0350] In the present application, the centrifugal volute may include a volute tongue air outlet section. The shroud may include a volute tongue air outlet section.

[0351] In the present application, the volute tongue air outlet section may include a first volute tongue air outlet section 413121. The centrifugal volute may include the first volute tongue air outlet section. The shroud may include the first volute tongue air outlet section.

[0352] In the present application, the volute tongue air outlet section may include a second volute tongue air outlet section 413122. The second volute tongue air outlet section may be located below the first volute tongue air outlet section.

[0353] In the present application, the top end of the second volute tongue air outlet section is connected to the bottom end of the first volute tongue air outlet section.

[0354] In the present application, the second volute tongue air outlet section may be formed on the water receiving tray.

[0355] In the present application, the second volute tongue air outlet section may be formed on the housing.

[0356] In the present application, the volute tongue air outlet section may include a third volute tongue air outlet section 413123. The third volute tongue air outlet section may be located below the second volute tongue air outlet section.

[0357] In the present application, the top end of the third volute tongue air outlet section may be connected to the top end of the second volute tongue air outlet section.

[0358] In the present application, the third volute tongue air outlet section may be formed on the housing.

[0359] In the present application, the peripheral wall of the centrifugal air duct may include a centrifugal air duct air outlet plate 4132.

[0360] In the present application, with reference to Figure 19 , the centrifugal air duct air outlet plate 4132 may include a first air outlet plate 41321.

[0361] In the present application, the centrifugal volute may include a first air outlet plate.

[0362] In the present application, the shroud includes a first air outlet plate.

[0363] In the present application, the centrifugal air duct outlet plate may include a second air outlet plate 41322. The second air outlet plate may be located below the first air outlet plate.

[0364] In the present application, the top end of the second air outlet plate may be connected to the bottom end of the first air outlet plate.

[0365] In the present application, the second air outlet plate may be formed on the housing.

[0366] In the present application, the centrifugal air duct outlet plate may include a centrifugal air duct outlet surface 41323. The centrifugal air duct outlet surface has a centrifugal air duct outlet contour line 413231. The centrifugal air duct outlet contour line is located in or parallel to a first plane.

[0367] In the present application, referring to Figure 20 , the bottom end of the centrifugal air duct outlet contour line is the front end of the centrifugal air duct outlet contour line. The included angle between the centrifugal air duct outlet contour line and a second plane is a ninth included angle α9.

[0368] In the present application, α9 ≥ a thirty-seventh parameter value. The thirty-seventh parameter value may be any value in the range of 25° - 35°. The thirty-seventh parameter value may be 30°. α9 ≥ 30°. This enables air to be guided forward and downward, avoiding a situation where the ninth angle is too small, which would result in poor downward air guiding effect.

[0369] In the present application, the centrifugal fan includes a centrifugal volute. A volute air inlet is formed on the centrifugal volute. The centrifugal fan is disposed 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 rotation of points on the centrifugal fan is the centrifugal fan outer contour 2221.

[0370] The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan.

[0371] In the radial direction of the centrifugal fan, the centrifugal fan outer contour surrounds the outside of the volute air inlet.

[0372] Referring to Figure 21 , the distance between the volute air inlet and the centrifugal fan outer contour in the radial direction of the centrifugal fan is an eleventh distance L11.

[0373] In the present application, L11 ≥ a thirty-eighth parameter value. The thirty-eighth parameter value may be any value in the range of 2 mm - 4 mm. The thirty-eighth parameter value may be 3 mm. L11 ≥ 3 mm. This can improve the air intake efficiency and avoid air recirculation.

[0374] In this application, L11 ≤ the value of the thirty-ninth parameter. The value of the thirty-ninth parameter can be any value in the range of 18 mm to 22 mm. The value of the thirty-ninth parameter can be 20 mm. This can minimize the shielding of both ends of the centrifugal fan by the centrifugal volute, ensuring the air volume.

[0375] In this application, 3 mm ≤ L11 ≤ 20 mm, which can improve the air intake efficiency, avoid air return, and can minimize the shielding of both ends of the centrifugal fan by the centrifugal volute, ensuring the air volume.

[0376] In this application, the rotation axis of the centrifugal fan can be perpendicular to the first plane.

[0377] In this application, the shroud has a shroud inner wall surface 22161. The shroud inner wall surface has a shroud inner contour line 221611. The shroud inner contour line 221611 is parallel to or lies in the first plane.

[0378] In this application, the inner surface of the volute tongue includes a volute tongue contour line 41314. The volute tongue contour line is parallel to or lies in the first plane.

[0379] In this application, the volute tongue contour line includes a volute tongue air intake section contour line 413141. The volute tongue air intake section contour line is located at the end of the volute tongue away from the air outlet of the centrifugal air duct.

[0380] In this application, the volute tongue contour line includes a volute tongue connection section contour line 413143.

[0381] In this application, the volute tongue contour line includes a volute tongue air outlet section contour line 413142. The volute tongue air outlet section contour line is located at the end of the volute tongue close to the air outlet of the centrifugal air duct.

[0382] In this application, the volute tongue connection section contour line is connected between the volute tongue air intake section contour line and the volute tongue air outlet section contour line.

[0383] In this application, the shroud inner contour line includes the volute tongue air intake section contour line.

[0384] In this application, the shroud inner contour line includes the volute tongue connection section contour line.

[0385] In this application, referring to Figure 22 , the connection point between the volute tongue air intake section contour line and the volute tongue connection section contour line is the third point A3.

[0386] In this application, the shroud inner contour line includes a shroud first contour line 2216111 connected to the volute tongue air intake section contour line.

[0387] In this application, in the first plane where the inner contour line of the shroud is located, the straight line on which the third point A3 and the rotation center of the centrifugal fan are located simultaneously 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.

[0388] In this application, in the first plane where the inner contour line of the shroud is located, the straight line perpendicular to the first straight line is the second straight line. The two intersection points of the second straight line and the inner contour line of the shroud are the fifth point A5 and the sixth point A6 respectively.

[0389] Along the extension direction of the inner contour line of the shroud, the fifth point A5 is located between the third point A3 and the fourth point A4.

[0390] In this application, referring to Figure 22 , in the first plane where the inner contour line of the shroud is located, the maximum contour when the centrifugal fan rotates is the first contour of the centrifugal fan.

[0391] The minimum distance between the third point A3 and the first contour of the centrifugal fan is the twelfth distance L12.

[0392] The minimum distance between the fourth point A4 and the first contour of the centrifugal fan is the thirteenth distance L13.

[0393] The minimum distance between the fifth point A5 and the first contour of the centrifugal fan is the fourteenth distance L14.

[0394] The minimum distance between the sixth point A6 and the first contour of the centrifugal fan is the fifteenth distance L15.

[0395] L15≥L13. L13≥L14. L14≥L12. It can make the distance between the first contour of the centrifugal fan and the inner contour line of the shroud increase gradually, and can increase the air pressure in the centrifugal volute.

[0396] L15 / L12≥the fortieth parameter value. The fortieth parameter value can be any value between 4 and 6. The fortieth parameter value can be 4. L15 / L12≥4. It can increase the air pressure in the centrifugal volute and improve the wind resistance of the centrifugal air duct.

[0397] In this application, referring to Figure 17 , the housing can include a front panel 133. The front panel 133 can be provided at the front of the housing.

[0398] In this application, an indoor air inlet can be formed on the front panel.

[0399] In this application, a first mounting opening can be formed on the front panel. The first mounting opening can penetrate the bottom plate in the thickness direction of the front panel.

[0400] In this application, referring to Figure 17, the housing may include an air inlet grille 132. An indoor air inlet may be formed on the air inlet grille. The air inlet grille may be installed in the first installation opening.

[0401] In this application, the main body may include a first filter screen. The first filter screen is used to filter the air entering the first cavity.

[0402] In this application, the first filter screen may be installed on the housing. The first filter screen may be installed inside the indoor air inlet.

[0403] In this application, the first filter screen may be installed on the front panel.

[0404] In this application, the first filter screen may be installed on the air inlet grille.

[0405] In this application, the main body may include an oil fume filter screen. The oil fume filter screen is used to filter oil fume.

[0406] In this application, the oil fume filter screen may be arranged inside the indoor air inlet.

[0407] In this application, refer to Figure 17 , the housing may include a bottom plate 131. The bottom plate 131 may be arranged at the bottom of the housing. An indoor air outlet may be formed on the bottom plate 131.

[0408] In this application, refer to Figure 17 , the main body may include a first air deflector 134. The first air deflector is rotatably connected to the housing. The first air deflector can partially open the indoor air outlet.

[0409] Refer to Figure 17 , the main body may include a second air deflector 135. The second air deflector is rotatably connected to the housing. The second air deflector can partially open the indoor air outlet.

[0410] In the height direction of the main body, the first air deflector may be located on the side of the second air deflector closer to the rear of the main body.

[0411] The first air deflector and the second air deflector jointly close the indoor air outlet.

[0412] In this application, the first air deflector and the second air deflector can be vertically arranged simultaneously to blow air downward.

[0413] In this application, the first air deflector and the second air deflector can be inclined downward so that the wind blows forward and downward to give the user a sense of wind.

[0414] In this application, the first air deflector is rotatably connected to the housing. The first air deflector opens or closes the indoor air outlet.

[0415] In this application, when the first air deflector closes the indoor air outlet, the second air deflector is located inside the first air deflector.

[0416] In this application, the air conditioner indoor unit can be an embedded air conditioner indoor unit. The air conditioner indoor unit can be embedded in the ceiling 903.

[0417] In this application, refer to Figure 23 - With reference to 24, the air intake housing 34 can be included in the air conditioner indoor unit. The air intake housing can be at least partially disposed above the ceiling. The air intake housing can be connected to the housing. The air intake housing can be located at the indoor air inlet.

[0418] In this application, refer to Figure 23 - With reference to 24, an air intake duct 341 can be formed inside the air outlet housing. The air intake duct can communicate with the first chamber.

[0419] In this application, refer to Figure 23 - With reference to 24, a first ceiling opening 9031 can be provided on the ceiling 903. The air below the ceiling 903 enters the air intake duct 341 through the first ceiling opening 9031 and then enters the first chamber.

[0420] In this application, refer to Figure 23 - With reference to 24, a second ceiling opening 9032 can be provided on the ceiling. The air in the first chamber flows to below the ceiling through the indoor air outlet and the second ceiling opening.

[0421] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although the above embodiments have been described in detail with reference to this application, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

[0422] For the sake of convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. 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 modified embodiments suitable for specific use considerations.

Claims

1. An air conditioner indoor unit, characterized in that: include: A main body, wherein the height direction of the main body is from the bottom to the top, and the main body at least comprises a first cavity located in the main body; The subject includes: A casing, wherein an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet are in communication with the first cavity; a centrifugal blower, disposed in the first chamber and comprising a centrifugal fan; An indoor heat exchanger is disposed in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and in the rear of the indoor air inlet; The indoor heat exchanger comprises: The first section heat exchanger has a top end and a bottom end as two ends in the width direction of the first section heat exchanger; in the front-rear direction of the main body, the bottom end of the first section heat exchanger is located in front of the top end of the first section heat exchanger; The second section heat exchanger has a top end and a bottom end as two ends in the width direction of the second section heat exchanger; in the front-rear direction of the main body, the top end of the second section heat exchanger is located in front of the bottom end of the second section heat exchanger; The third section heat exchanger, whose top and bottom are two ends in the width direction of the third section heat exchanger; the top of the third section heat exchanger is connected to the bottom of the first section heat exchanger; the bottom of the third section heat exchanger is connected to the top of the second section heat exchanger; The angle between the width direction of the first section heat exchanger and the width direction of the third section heat exchanger is a fifth angle α5, 90°<α5<180°; An angle between the width direction of the third section heat exchanger and the width direction of the second section heat exchanger is a sixth angle α6, 90°<α6<180°.

2. The air conditioner indoor unit according to claim 1, characterized in that: defining a plane perpendicular to the height direction of the main body as a second plane; The angle between the width direction of the first section heat exchanger and the second plane is a second angle α2, α2 ≥ 40°; The angle between the width direction of the second section heat exchanger and the second plane is a third angle α3, 40°≤α3≤70°; The angle between the width direction of the third section heat exchanger and the second plane is a fourth angle α5, 70°≤α4≤110°.

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

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

5. The air conditioner indoor unit according to claim 1, characterized in that: The main body comprises a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct and a peripheral wall of the centrifugal air duct; The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axial direction of the centrifugal fan, and a volute air inlet is formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct; The centrifugal air duct peripheral wall is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outer side of the centrifugal fan; The first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the peripheral wall of the centrifugal air duct form a centrifugal air duct, and the centrifugal air duct peripheral wall defines a centrifugal air duct outlet between two ends of the centrifugal air duct peripheral wall that are arranged opposite to each other along the circumference of the centrifugal fan, and the centrifugal air duct outlet is located at the bottom end of the centrifugal air duct; the centrifugal air duct outlet and the volute air inlet are connected to the centrifugal air duct; The centrifugal fan comprises a centrifugal volute, the volute air inlet is formed on the centrifugal volute, a volute air duct is formed in the centrifugal volute, the centrifugal air duct comprises the volute air duct, and the centrifugal fan is arranged in the volute air duct; The peripheral wall of the centrifugal air duct includes a volute tongue, the air outlet of the centrifugal air duct is located at the bottom end of the volute tongue, and the bottom end of the volute tongue is located at the front end of the air outlet of the centrifugal air duct; The point of the second heat exchanger closest to the rear end of the main body is the rearmost point of the second heat exchanger; In the front-to-rear direction of the main body, the rearmost point of the second heat exchanger is located behind the bottom end of the volute tongue; In the front-to-back direction of the main body, the distance between the rearmost point of the second-stage heat exchanger and the bottom end of the volute tongue is a seventh distance L7, 5mm≤L7≤10mm.

6. An air conditioner indoor unit, characterized in that: include: A main body, wherein the height direction of the main body is from the bottom to the top, and the main body at least comprises a first cavity located in the main body; The subject includes: A casing, wherein an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet are in communication with the first cavity; a centrifugal fan, disposed in the first chamber and comprising a centrifugal fan; An indoor heat exchanger is disposed in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and in the rear of the indoor air inlet; defining a plane perpendicular to the 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 the first plane or located in the first plane; the indoor heat exchanger includes a first end and a second end of the heat exchanger that are arranged opposite to each other in the width direction; In the height direction of the main body, the second end of the heat exchanger is located on a side of the first end of the heat exchanger close to the bottom of the main body; Along the width direction of the indoor heat exchanger, the indoor heat exchanger is arc-shaped or folded-line-shaped; the indoor heat exchanger bulges toward a side close to the indoor air outlet.

7. The air conditioner indoor unit according to claim 6, characterized in that: defining a plane perpendicular to the height direction of the main body as a second plane; The indoor heat exchanger comprises a heat exchanger windward surface located on a side thereof away from the centrifugal fan; The windward surface of the heat exchanger 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 first length W1; The windward surface contour line includes a first sub-windward surface contour line, and the angle between the tangent line of the first sub-windward surface contour line and the second plane is a first angle α1, α1≥45°; The midpoint of the windward surface contour line is located on the first sub-windward surface contour line; The length of the contour line between the vertex of the first sub-windward surface contour line and the midpoint of the windward surface contour line is a second length W2, and the length of the contour line between the lowest point of the first sub-windward surface contour line and the midpoint of the windward surface contour line is a third length W3, 1 / 4≤W2 / W1≤2 / 5, 1 / 4≤≤W3 / W1≤2 / 5.

8. The air conditioner indoor unit according to claim 6, characterized in that: The centrifugal fan includes a centrifugal volute; the minimum distance between the first end of the heat exchanger and the centrifugal volute is a second distance L2, L2≤30mm.

9. The air conditioner indoor unit according to claim 6, characterized in that: The centrifugal fan includes a centrifugal volute; the minimum distance between the second end of the heat exchanger and the centrifugal volute is a third distance L3, L2≤30mm.

10. An air conditioner indoor unit, characterized in that: include: A main body, wherein the height direction of the main body is from the bottom to the top, and the main body at least comprises a first cavity located in the main body; The subject includes: A casing, wherein an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet are in communication with the first cavity; a centrifugal fan, disposed in the first chamber and comprising a centrifugal fan; An indoor heat exchanger is disposed in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and in the rear of the indoor air inlet; defining a plane perpendicular to the height direction of the main body as a second plane; The indoor heat exchanger comprises: The first section heat exchanger has a top end and a bottom end as two ends in the width direction of the first section heat exchanger; in the front-rear direction of the main body, the bottom end of the first section heat exchanger is located in front of the top end of the first section heat exchanger; The second section heat exchanger has a top end and a bottom end as two ends in the width direction of the second section heat exchanger; in the front-rear direction of the main body, the top end of the second section heat exchanger is located in front of the bottom end of the second section heat exchanger; the top end of the second section heat exchanger is connected to the bottom end of the first section heat exchanger; The angle between the width direction of the first section heat exchanger and the second plane is a second angle α2, α2<45°; the angle between the width direction of the second section heat exchanger and the second plane is a third angle α3, α3<45°.

11. The air conditioner indoor unit according to claim 10, characterized in that: The centrifugal fan comprises a centrifugal volute, a volute air inlet is formed on the centrifugal volute, a volute air duct is formed in the centrifugal volute, and the centrifugal fan is arranged in the volute air duct; The minimum distance between the first section heat exchanger and the volute air inlet is a fourth distance L4, 8mm≤≤L4≤≤30mm; The minimum distance between the second-stage heat exchanger and the volute air inlet is the fifth distance L5, 8mm≤≤L5≤≤30mm.

12. An air conditioner indoor unit, characterized in that: include: A main body, wherein the height direction of the main body is from the bottom to the top, and the main body at least comprises a first cavity located in the main body; The subject includes: A casing, wherein an indoor air inlet is provided on the front side of the casing, an indoor air outlet is provided on the bottom of the casing, and the indoor air outlet and the indoor air inlet are in communication with the first cavity; a centrifugal blower, disposed in the first chamber and comprising a centrifugal fan; An indoor heat exchanger is disposed in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and in the rear of the indoor air inlet; defining a plane perpendicular to the height direction of the main body as a second plane; The indoor heat exchanger comprises: The first section heat exchanger, the top end and the bottom end of which are the two ends in the width direction of the first section heat exchanger; The second section heat exchanger has a top end and a bottom end as two ends in the width direction of the second section heat exchanger; in the front-rear direction of the main body, the top end of the second section heat exchanger is located in front of the bottom end of the second section heat exchanger; the top end of the second section heat exchanger is connected to the bottom end of the first section heat exchanger; The angle between the width direction of the first section heat exchanger and the second plane is a second angle α2, α2 ≥ 45°; The angle between the width direction of the second section heat exchanger and the second plane is a third angle α3, α3 ≥ 45°; An angle between the width direction of the first section heat exchanger and the width direction of the second section heat exchanger is a fourth angle α4, α4<180°, and an opening direction of the fourth angle is toward the centrifugal fan.

13. An air conditioner indoor unit, characterized in that: include: A main body, wherein the height direction of the main body is from the bottom to the top, and the main body at least comprises a first cavity located in the main body; The subject includes: A casing, wherein an indoor air inlet is provided at the bottom thereof, an indoor air outlet is provided at the front side of the casing, and the indoor air outlet and the indoor air inlet are in communication with the first cavity; a centrifugal fan, disposed in the first chamber, the centrifugal fan comprising a centrifugal volute and a centrifugal fan, the centrifugal fan being disposed in the centrifugal volute; An indoor heat exchanger is disposed in the first cavity; the indoor heat exchanger is located in front of the centrifugal fan and in the rear of the indoor air outlet; defining a plane perpendicular to the height direction of the main body as a second plane; The indoor heat exchanger has a width direction; the two ends of the indoor heat exchanger in the width direction are the top end and the bottom end of the indoor heat exchanger; the indoor heat exchanger is a section; In the front-to-back direction of the main body, the top end of the indoor heat exchanger is located in front of the bottom end of the indoor heat exchanger, and the angle between the width direction of the indoor heat exchanger and the second plane is an eighth angle α8, α8≥45°; The centrifugal volute is formed with a volute air inlet, and the volute air inlet is arranged on both sides of the centrifugal volute in the axial direction of the centrifugal fan; The minimum distance between the indoor heat exchanger and the volute air inlet is the eighth distance L8, 8mm≤L8≤30mm.

14. The air conditioner indoor unit according to claim 6 or 13, characterized in that: The centrifugal fan comprises: Centrifugal volute; The centrifugal fan is arranged in the centrifugal volute; A centrifugal motor connected to the centrifugal fan and driving the centrifugal fan to rotate; When the centrifugal fan rotates, the 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; in the height direction of the main body, the height difference between the rotating axis of the centrifugal fan and the center of the indoor heat exchanger is a first distance L1, L1 / D1≤1 / 2.

15. The air conditioner indoor unit according to claim 1 or 6 or 10 or 12 or 13, characterized in that: The main body comprises a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct and a peripheral wall of the centrifugal air duct; The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axial direction of the centrifugal fan, and a volute air inlet is formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct; The centrifugal air duct peripheral wall is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outer side of the centrifugal fan; The first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the peripheral wall of the centrifugal air duct form a centrifugal air duct, and the centrifugal air duct peripheral wall defines a centrifugal air duct air outlet between two ends of the centrifugal air duct peripheral wall that are arranged opposite to each other along the circumference of the centrifugal fan; the centrifugal air duct air outlet and the volute air inlet are connected to the centrifugal air duct; the centrifugal air duct air outlet is located at the bottom end of the centrifugal air duct; The peripheral wall of the centrifugal air duct includes a volute tongue; the peripheral wall of the centrifugal air duct includes a centrifugal air duct air outlet plate, and the centrifugal air duct air outlet plate is spaced apart from the volute tongue and is located behind the volute tongue; The centrifugal air duct air outlet is formed at the bottom end of the volute tongue and the centrifugal air duct air outlet plate; The minimum distance between the volute tongue and the air outlet plate of the centrifugal air duct is a ninth distance L9; The centrifugal air duct air outlet plate includes a first point A1, and the minimum distance between the first point A1 and the volute tongue is a ninth distance L9; the first point A is located between the top and bottom ends of the centrifugal air duct 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≤L9 / D1≤1 / 2.

16. The air conditioner indoor unit according to claim 1 or 6 or 10 or 12 or 13, characterized in that: The main body comprises a first side wall of the centrifugal air duct, a second side wall of the centrifugal air duct and a peripheral wall of the centrifugal air duct; The first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct are located on both sides of the axial direction of the centrifugal fan, and a volute air inlet is formed on the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct; The centrifugal air duct peripheral wall is arranged between the first side wall of the centrifugal air duct and the second side wall of the centrifugal air duct and surrounds the outer side of the centrifugal fan; The first side wall of the centrifugal air duct, the second side wall of the centrifugal air duct and the peripheral wall of the centrifugal air duct form a centrifugal air duct, and the centrifugal air duct peripheral wall defines a centrifugal air duct air outlet between two ends of the centrifugal air duct peripheral wall that are arranged opposite to each other along the circumference of the centrifugal fan; the centrifugal air duct air outlet and the volute air inlet are connected to the centrifugal air duct; the centrifugal air duct air outlet is located at the bottom end of the centrifugal air duct; The peripheral wall of the centrifugal air duct includes a volute tongue; The centrifugal fan comprises a centrifugal motor, which is connected to the centrifugal fan and drives the centrifugal fan to rotate, and the maximum contour formed by the rotation of points on the centrifugal fan is the outer contour of the centrifugal fan; The minimum distance between the outer contour of the centrifugal fan and the volute tongue is the tenth distance L10, 4mm≤L10≤10mm.

17. The air conditioner indoor unit according to claim 1 or 6 or 10 or 12 or 13, characterized in that: The centrifugal fan comprises: Centrifugal volute; The centrifugal fan is arranged in the centrifugal volute; a centrifugal motor connected to the centrifugal fan and driving the centrifugal fan to rotate; when the centrifugal fan rotates, the maximum contour formed by the rotation of points on the centrifugal fan is the outer contour of the centrifugal fan; The volute air inlet is located on both sides of the centrifugal volute in the axial direction of the centrifugal fan; In the radial direction of the centrifugal fan, the outer contour of the centrifugal fan surrounds the outer side of the volute air inlet; The distance between the volute air inlet and the outer contour of the centrifugal fan in the radial direction of the centrifugal fan is an eleventh distance L11, 3mm≤L11≤20mm.

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