CN112555993B

CN112555993B - Air conditioner

Info

Publication number: CN112555993B
Application number: CN202011435915.7A
Authority: CN
Inventors: 李涛; 张明军; 赵继斌
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-09-06
Anticipated expiration: 2040-12-07
Also published as: CN112555993A

Abstract

The present invention relates to an air conditioner. This air conditioner includes: the air duct is positioned between an upper air duct framework and a lower air duct framework of the air conditioner, the upper air duct framework is provided with a first curved front edge, and the lower air duct framework is provided with a second curved front edge; and an outlet located at the outlet of the air duct and defined by the first and second front edges fitted to each other to form a solid outlet. The first front edge and the second front edge have substantially the same curved shape and are substantially parallel to each other and spaced apart from each other by a predetermined distance in a vertical direction, so that a three-dimensional air outlet can be formed. Can blow to the different levels in the room that is adjusted from this three-dimensional air outlet, the wind that blows out and then can carry out the flash mixed with the air on the different levels, finally can improve the cooling or the programming rate of temperature of air.

Description

Air conditioner

Technical Field

The present invention relates to air conditioning systems, and in particular to air conditioners.

Background

An existing air conditioner or its indoor unit (hereinafter, simply referred to as "air conditioner") disposed in a room to be conditioned is generally disposed with a heat exchanger and a fan inside thereof, and is provided with an air outlet duct (hereinafter, simply referred to as "duct") downstream of the fan and an air outlet at an outlet of the duct, the air outlet being generally located at a lower side of a front panel of the air conditioner. In addition, an air intake is generally provided on the top side or upper side of the air conditioner. When the air conditioner is operated, the heat exchanger can be used as an evaporator or a condenser to realize the functions of cooling or heating. Fans, such as cross-flow fans, draw air from the conditioned room (which is commonly referred to as "return air") or fresh air from the outside into the air conditioner through an air intake on the air conditioner. The air is cooled or heated by passing over a heat exchanger in the air conditioner. The cooled or heated air flows through the duct and is blown from the outlet into the conditioned room.

Most of air ducts of the existing air conditioner adopt a transversely-stretched volute type, so that air outlets of the air conditioner generally present a straight shape, and horizontal air outlet can be generated. For example, chinese utility model patent CN203571893U discloses a vertical air conditioner indoor unit. The vertical air conditioner indoor unit uses a cylindrical cross-flow fan and an air channel matched with the cylindrical cross-flow fan. The air duct is a transversely-stretched volute type and mainly formed by a volute and a volute tongue in a surrounding mode, therefore, when viewed from the front side of the air conditioner, the air outlet at the outlet of the air duct is approximately in a straight line shape, and air in the air duct is blown out of the air outlet along the same horizontal height. The consequence of this horizontal outlet is that the air is blown out from the outlet at approximately the same level and therefore cannot mix immediately with air at other different levels in the room, thereby affecting the rate of cooling or heating of the surrounding air.

Accordingly, there is a need in the art for a new solution to the above problems.

Disclosure of Invention

In order to solve the above problem of slow air mixing caused by horizontal air outlet of an air conditioner in the prior art, the present invention provides an air conditioner, comprising: the air duct is positioned between an upper air duct framework and a lower air duct framework of the air conditioner, the upper air duct framework is provided with a first curved front edge, and the lower air duct framework is provided with a second curved front edge; and an outlet located at the outlet of the wind tunnel and defined by the first and second front edges fitted to each other to form a solid outlet.

It will be understood by those skilled in the art that in the air conditioner of the present invention, the duct is defined by an upper duct skeleton having a first front edge of a curved shape and a lower duct skeleton having a second front edge of a curved shape. The first front edge and the second front edge have substantially the same curved shape, are substantially parallel to each other, and are spaced apart from each other by a predetermined distance in the vertical direction, so that a three-dimensional air outlet can be formed. The three-dimensional air outlet means that different parts of the same air outlet are at different horizontal heights in the vertical direction, so that air can be blown to different horizontal heights in a room to be adjusted from the three-dimensional air outlet, the blown air can be rapidly mixed with air at different horizontal heights, and finally the cooling or heating speed of the air can be improved.

In a preferable embodiment of the air conditioner, each of the first front edge and the second front edge is formed by a curve composed of a horizontal line segment and straight line segments extending from two ends of the horizontal line segment to the outside and obliquely upward, so that the outlet is formed as a V-shaped three-dimensional outlet. The air blown out from the substantially V-shaped outlet port can be mixed with the air in the room to be conditioned more quickly, and the cooling or heating rate of the air conditioner can be increased.

In a preferred technical solution of the above air conditioner, the air duct includes a front air duct extending rearward from the air outlet and a rear air duct extending rearward from the front air duct, and the front air duct is defined by an upper curved surface formed on the upper air duct skeleton and a front curved surface formed on the lower air duct skeleton, so that a cross section of the front air duct parallel to the air outlet has a shape identical to that of the air outlet. The cross section of the front air duct is consistent with the shape of the air outlet, so that the air leaving the front air duct can be blown out through the air outlet without being blocked.

In a preferred embodiment of the air conditioner, the upper curved surface has a first middle plane, a first left plane, and a first right plane extending from the first front edge backward by the length of the front duct, the first left plane extends from left to right obliquely downward to the first middle plane, and the first right plane extends from right to left obliquely downward to the first middle plane; the front curve has a second mid-plane, a second left plane, and a second right plane, the second left plane extending diagonally downward from left to right to the second mid-plane, and the second right plane extending diagonally downward from right to left to the second mid-plane; and the upper curved surface is fitted with the front curved surface, so that the front air duct has a V-shaped cross section. The upper curved surface constituted by the first middle plane, the first left plane, and the first right plane and the front curved surface constituted by the second middle plane, the second left plane, and the second right plane are substantially identical in shape to each other, and are spaced apart by a predetermined distance (which forms the height of the front duct in the vertical direction) in the vertical direction and are substantially parallel, thereby forming a substantially V-shaped cross section. The V-shaped front air duct can further enhance the three-dimensional air outlet effect.

In a preferred embodiment of the above air conditioner, the first left plane and the first right plane are symmetrical to each other with respect to the first mid-plane, and the second left plane and the second right plane are symmetrical to each other with respect to the second mid-plane. Thus, a front air duct with bilateral symmetry can be formed. The symmetrical front air duct can ensure the balance and stable operation of the air conditioner.

In a preferred technical solution of the above air conditioner, the rear air duct is defined by a rear curved surface formed on the lower air duct framework, and the rear curved surface includes a third middle arc curved surface, a third left conical curved surface, and a third right conical curved surface, wherein the third middle arc curved surface is tangent to the second middle plane and extends from the second middle plane to the rear upper side; the third left conical curved surface is tangent to the second left plane and extends from the second left plane to the back and the top, and the third left conical curved surface extends to the third middle arc curved surface from left to right in a radial gradually expanding manner; and the third right conical curved surface is tangent to the second right plane and extends from the second right plane to the rear upper part, and the third right conical curved surface extends to the third middle arc curved surface from right to left in a radial gradually expanding manner. The rear air duct defined by the rear curved surface may be matched with a cross-flow fan having two corresponding tapered fan blade portions, for example, a third left tapered curved surface and a third right tapered curved surface are respectively parallel to the tapered outer surfaces of the corresponding tapered fan blade portions, so as to increase the total air supply amount of the air conditioner by extending the actual lengths of the inclined fan blades of the tapered fan blade portions without changing the longitudinal total length of the air conditioner.

In a preferred embodiment of the above air conditioner, the third left conical curved surface and the third right conical curved surface are symmetrical to each other with respect to the third middle arc curved surface. Thus, the left and right symmetrical rear air duct can be formed. The symmetrical rear air duct further ensures the balance and stable operation of the air conditioner.

In a preferred embodiment of the above air conditioner, a cross-flow fan is provided in the air conditioner, and a dividing plane perpendicular to a tangential plane between the front curved surface and the rear curved surface may extend through a rotation center of the cross-flow fan and extend obliquely downward from the rotation center rearward so that the dividing plane forms a predetermined acute angle with a vertical plane extending through the rotation center. This configuration of the interface of the front curved surface and the rear curved surface ensures that the flow direction of the wind discharged from the cross flow fan is aligned with the front duct, avoiding unnecessary windage loss and noise.

In the preferable technical scheme of the air conditioner, the acute included angle ranges from 35 degrees to 45 degrees.

In a preferred technical scheme of the air conditioner, the air conditioner is a wall-mounted air conditioner.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic front view of an embodiment of a frame assembly of the air conditioner of the present invention;

FIG. 2 is a schematic perspective view of an embodiment of an air duct skeleton of an air conditioner of the present invention;

FIG. 3 is a schematic perspective view of an embodiment of an upper duct skeleton of an air conditioner of the present invention;

FIG. 4 is a schematic plan view of an embodiment of a lower duct skeleton of an air conditioner of the present invention;

FIG. 5 is a schematic right view of an embodiment of a frame assembly with a cross flow fan of an air conditioner of the present invention.

List of reference numerals:

1. a framework assembly of an air conditioner; 2. a cross-flow fan; 11. an air duct; 111. a front air duct; 112. a rear air duct; 12. an air outlet; 13. an upper airway skeleton; 131. a first front edge; 132. an upper curved surface; 14. a lower air duct framework; 141. a second front edge; 142. a front curve; 143. a rear curve; 311. a first straight line segment; 312. a first left straight line segment; 313. a first right straight segment; 321. a first midplane; 322. a first left plane; 323. a first right plane; 411. a second straight line segment; 412. a second left straight line segment; 413. a second right straight line segment; 421. a second midplane; 422. a second left plane; 423. a second right plane; 431. a third middle arc curved surface; 432. a third left conical curved surface; 433. a third right conical curved surface.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be directly connected or indirectly connected through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to solve the technical problem of slow air mixing caused by horizontal air outlet of an air conditioner in the prior art, the invention provides an air conditioner, which comprises: an air duct 11, the air duct 11 being positioned between an upper duct skeleton 13 and a lower duct skeleton 14 of the air conditioner, the upper duct skeleton 13 having a curved first front edge 131, and the lower duct skeleton 14 having a curved second front edge 141; and an outlet 12, the outlet 12 being located at the outlet of the air duct 11 and being defined by a first front edge 131 and a second front edge 141 fitted to each other to form a solid outlet 12. Through such single three-dimensional air outlet, the air outlet of the air conditioner and the air in the room to be conditioned can be promoted to be mixed more quickly, and then the temperature is raised or lowered more quickly.

The term "fit" as referred to herein, unless expressly stated to the contrary, means that two associated elements or objects are congruent in shape with each other and are spaced apart from each other by a predetermined distance and are substantially parallel. The term "framework" as referred to herein refers to different structural members constituting the air conditioner, and the term "framework assembly" as referred to herein refers to a structural member assembly formed by assembling all the structural members of the air conditioner together. The terms "front" and "rear" referred to herein are based on an orientation in which the air conditioner is horizontally placed and extends from the front side (side where the outlet vent is located) of the air conditioner to the back of the air conditioner, such as the orientation shown in fig. 1.

Fig. 1 is a front schematic view of an embodiment of a frame assembly of an air conditioner of the present invention, and fig. 2 is a perspective schematic view of an embodiment of a duct frame of an air conditioner of the present invention. As shown in fig. 1, in one or more embodiments, the air conditioner of the present invention is a wall-mounted air conditioner that may be mounted on a vertical wall (e.g., a wall of a conditioned room). Alternatively, the air conditioner of the present invention may be a stereo air conditioner or other suitable type of air conditioner. As shown in fig. 1, the framework assembly 1 of the air conditioner can be used to mount and support various components of the air conditioner, including but not limited to a heat exchanger, a fan, a motor for driving the fan, a control panel (not shown) for controlling the air conditioner, etc. As shown in fig. 1, an air duct 11 and an air outlet 12 located at an outlet of the air duct 11 are formed on a frame assembly 1 of the air conditioner. As shown in fig. 1 and 2, the duct 11 is located between the upper duct frame 13 and the lower duct frame 14.

As shown in fig. 1 and 2, the upper duct skeleton 13 has a curved first front edge 131 and the lower duct skeleton 14 has a curved second front edge 141, based on the orientation shown in fig. 1. As shown in fig. 1 and 2, in one or more embodiments, the first front edge 131 is formed from a curve that includes a first straight line segment 311, a first left straight line segment 312, and a first right straight line segment 313. Based on the orientation shown in FIG. 1, the first straight line segment 311 is a horizontal straight line segment; the first left straight line segment 312 extends leftward and obliquely upward from the left end of the first straight line segment 311; the first right linear segment 313 extends rightward and obliquely upward from the right end of the first linear segment 311. In one or more embodiments, the first left linear segment 312 and the first right linear segment 313 are bilaterally symmetric with respect to the first linear segment 311. As shown in fig. 1 and 2, in one or more embodiments, the second front edge 141 is formed from a curve comprising a second straight line segment 411, a second left straight line segment 412, and a second right straight line segment 413. Based on the orientation shown in FIG. 1, the second straight line segment 411 is a horizontal straight line segment; a second left straight line segment 412 extends to the left and obliquely upward from the left end of the second straight line segment 411; the second right straight line segment 413 extends from the right end of the second straight line segment 411 to the right and diagonally upward. In one or more embodiments, the second left straight line segment 412 and the second right straight line segment 413 are bilaterally symmetric with respect to the second straight line segment 411. It follows that first front edge 131 is substantially identical in configuration in shape to second front edge 141, and is arranged substantially parallel to each other and spaced apart by a predetermined distance in the vertical direction. Therefore, the first front edge 131 and the second front edge 141 can be regarded as fitting to each other, and together enclose the three-dimensional substantially V-shaped or inverted trapezoidal outlet 12. Through the V-shaped or inverted trapezoidal outlet 12, the air conditioner can blow air outwards from different levels, so that the temperature in the room to be conditioned can be lowered or raised more quickly. Alternatively, the first front edge 131 and the second front edge 141 may adopt a curve of other shapes that are fitted, for example, a curve composed of arc-shaped line segments, as long as the outlet vent is formed to allow the air conditioner to blow out from different levels.

As shown in fig. 1 and 2, the duct 11 may be divided into a front duct 111 and a rear duct 112 communicating with each other. The rear duct 112 extends rearward from the front duct 111. A fan of an air conditioner, such as a cross flow fan 2 (see fig. 5), may be disposed in the rear duct 112. Therefore, the air discharged from the fan flows through the rear air path 112, flows into the front air path 111, and is discharged from the outlet 12.

Fig. 3 is a perspective view illustrating an embodiment of an upper duct skeleton of an air conditioner of the present invention, and fig. 4 is a plan view illustrating an embodiment of a lower duct skeleton of an air conditioner of the present invention. As shown in fig. 3 and 4, the front air path 111 is defined by an upper curved surface 132 formed on the upper air path frame 13 and a front curved surface 142 formed on the lower air path frame 14. As shown in FIG. 3, in one or more embodiments, the upper curved surface 132 is formed by a first mid-plane 321, a first left-plane 322, and a first right-plane 323. As shown in fig. 2 and 3, the first middle plane 321 extends backward from the first straight line segment 311 by substantially the length (along the wind outlet direction) of the front wind tunnel 111. Based on the orientation shown in fig. 2 and 3, the first left plane 322 extends from the first left straight section 312 rearward by substantially the length of the front wind tunnel 111 and diagonally downward from left to right to the first mid-plane 321; the first right plane 323 extends rearward from the first right straight section 313 for substantially the length of the front wind tunnel 111 and extends diagonally downward from right to left to the first mid-plane 321. In one or more embodiments, the first left plane 322 and the first right plane 323 are bilaterally symmetric with respect to the first mid-plane 321. As shown in fig. 4, the front curved surface 142 has a second middle plane 421, a second left plane 422, and a second right plane 423. As shown in fig. 4, a second midplane 421 extends rearward from the second straight section 411. A second left plane 422 extends rearwardly from the second left straight line segment 412 and diagonally downwardly from left to right to a second mid-plane 421. The second right plane 423 extends rearward from the second right straight line segment 413 and diagonally downward from right to left to the second midplane 421. In one or more embodiments, the second left plane 422 and the second right plane 423 are bilaterally symmetric with respect to the second midplane 421. As can be seen, the upper curved surfaces 132 are substantially identical in shape to the front curved surfaces 142 and are arranged substantially parallel to each other and spaced apart from each other by a predetermined distance in the vertical direction. Therefore, the upper curved surface 132 and the front curved surface 142 can be regarded as fitting portions of each other, and together enclose the front air duct 111. The cross section of the front air duct 111 perpendicular to the air outlet direction is substantially V-shaped or inverted trapezoid, and is consistent with the shape of the air outlet 12, so that the three-dimensional air outlet effect can be further enhanced, and the air outlet resistance is reduced. Alternatively, the upper curved surface 132 and the front curved surface 142 may adopt other shapes of curved surfaces which are fitted, for example, curved surfaces composed of arc-shaped curved surfaces.

As shown in fig. 2 and 4, the rear duct 112 is defined by a rear curved surface 143 formed on the lower duct skeleton 14. As shown in fig. 2 and 4, in one or more embodiments, the rear curved surface 143 includes a third middle arc curved surface 431, a third left tapered curved surface 432, and a third right tapered curved surface 433. As shown in fig. 2 and 4, the third middle arc 431 is tangent to the second middle plane 421 and extends upward and rearward from the second middle plane 421. In addition, the third middle curved surface 431 gradually expands to both the left and right. The third middle curved surface 431 may be a portion of a cylindrical surface having the same diameter. The center line of the cylindrical surface extends in the horizontal direction (i.e., the longitudinal direction of the air conditioner) based on the orientation shown in fig. 1. The centre line of the cylindrical surface may coincide with the centre axis C (see fig. 5) of the crossflow fan 2. As shown in fig. 2 and 4, the third left conical curved surface 432 is tangent to the second left flat surface 422 and extends upward and rearward from the second left flat surface 422. Meanwhile, the third left conical curved surface 432 is extended to the third middle arc curved surface 431 with gradually expanding radially from left to right. As shown in fig. 4, the third right conical curved surface 433 is tangent to the second right plane 423 and extends upward and rearward from the second right plane 423. Meanwhile, the third right tapered curved surface 433 also extends radially from right to left to gradually expand to the third middle curved surface 431. In one or more embodiments, the third left conical curved surface 432 and the third right conical curved surface 433 may be left-right symmetrical with respect to the third middle arc curved surface 431. With the rear curved surface 143 configured as described above, the rear duct 112 has two portions whose cross sections are gradually increased perpendicular to the longitudinal direction of the air conditioner along the longitudinal direction from both ends of the air conditioner toward the center of the air conditioner. Such a rear duct 112 may be matched with a cross-flow fan having corresponding tapered blade portions on the left and right sides, for example, a part of the tapered outer surface of each tapered blade portion may be parallel to a corresponding one of the third left tapered curved surface 432 and the third right tapered curved surface 433. The design of the conical fan blade part aims to increase the actual length of the fan blades under the condition of not changing the total axial length of the cross flow fan, and further increase the total air supply quantity. Therefore, the air duct and the matched cross flow fan can increase the total air supply quantity of the air conditioner without changing the total size of the air conditioner.

FIG. 5 is a schematic right view of an embodiment of a frame assembly with a cross flow fan of an air conditioner of the present invention. As shown in fig. 5, the rear duct 112 is substantially volute-shaped as viewed in a cross section perpendicular to the longitudinal direction of the air conditioner, and the front duct 111 forms a volute tongue of the volute. The rear curved surface 143 is tangent to the front curved surface 142 so that there is an imaginary tangent plane therebetween. An imaginary dividing plane C1 between the rear curved surface 143 and the front curved surface 142 is perpendicular to a tangential plane between the rear curved surface 143 and the front curved surface 142. As shown in fig. 5, the dividing plane C extends through the center axis C of the crossflow blower 2 in the air conditioner. Based on the orientation shown in FIG. 5, the dividing plane C1 extends diagonally downward and rightward from the central axis C. Further, the dividing surface C1 forms a predetermined acute included angle β with a vertical plane V extending through the central axis C. Acute included angle β may be in the range of 35 ° to 45 °, such as 40 ° or other suitable angle. Such an angle is designed to ensure that the flow direction of the wind discharged from the cross flow fan is aligned with the front wind tunnel 111, thereby preventing unnecessary windage loss and noise.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art may combine technical features of different embodiments, and may make equivalent changes or substitutions for related technical features, and such changes or substitutions will fall within the scope of the present invention.

Claims

1. An air conditioner, characterized in that the air conditioner comprises:

the air duct is positioned between an upper air duct framework and a lower air duct framework of the air conditioner, the upper air duct framework is provided with a first curved front edge, and the lower air duct framework is provided with a second curved front edge; and

an outlet opening located at the outlet of the air duct and defined by the first and second front edges fitting to each other to form a solid outlet opening,

wherein the air duct includes a front air duct extending rearward from the air outlet and a rear air duct extending rearward from the front air duct,

the front air duct is defined by an upper curved surface formed on the upper air duct framework and a front curved surface formed on the lower air duct framework, so that the shape of the cross section of the front air duct parallel to the air outlet is the same as that of the air outlet; wherein the upper curved surface has a first mid-plane extending rearwardly from the first front edge for the length of the front duct, a first left-plane extending diagonally downwardly from left to right to the first mid-plane, and a first right-plane extending diagonally downwardly from right to left to the first mid-plane; the front curve has a second mid-plane, a second left plane, and a second right plane, the second left plane extending diagonally downward from left to right to the second mid-plane, and the second right plane extending diagonally downward from right to left to the second mid-plane; the upper curved surface is fitted with the front curved surface, so that the front air duct has a V-shaped cross section;

wherein the rear air duct is defined by a rear curved surface formed on the lower air duct framework, the rear curved surface including a third middle arc curved surface, a third left conical curved surface, and a third right conical curved surface, wherein the third middle arc curved surface is tangent to the second middle plane and extends from the second middle plane upwards and backwards; the third left conical curved surface is tangent to the second left plane and extends from the second left plane to the back and the top, and the third left conical curved surface extends to the third middle arc curved surface from left to right in a radial gradually expanding manner; and the third right conical curved surface is tangent to the second right plane and extends from the second right plane to the rear upper part, and the third right conical curved surface extends to the third middle arc curved surface from right to left in a radial gradually expanding manner; and

wherein a cross flow fan is provided in the air conditioner, and a dividing surface perpendicular to a tangential plane between the front curved surface and the rear curved surface may extend through a rotation center of the cross flow fan and extend obliquely downward rearward from the rotation center such that the dividing surface forms a predetermined acute included angle with a vertical plane extending through the rotation center.

2. The air conditioner according to claim 1, wherein the first front edge and the second front edge are each constituted by a curve composed of a horizontal line segment and straight line segments extending outward and obliquely upward from both ends of the horizontal line segment, respectively, so that the outlet port is formed as a V-shaped outlet port.

3. The air conditioner of claim 1, wherein the first left plane and the first right plane are symmetrical to each other with respect to the first mid-plane, and the second left plane and the second right plane are symmetrical to each other with respect to the second mid-plane.

4. The air conditioner according to claim 1, wherein the third left and right tapered curved surfaces are symmetrical to each other with respect to the third middle curved surface.

5. The air conditioner of claim 1, wherein said acute included angle is in the range of 35 ° -45 °.

6. The air conditioner according to claim 1 or 2, wherein the air conditioner is a wall-mounted air conditioner.