Indoor unit of air conditioner

Abstract

The utility model provides an indoor unit of an air conditioner. The indoor unit comprises a shell and a cross-flow wind wheel. The shell comprises a front shell. The front shell is provided with an air outlet and two air inlets located in the two sides of the air outlet. The cross-flow wind wheel is rotationally connected into the shell. The two cross-flow wind wheels are located on the two sides of the air outlet. The two air inlets are located in the two sides of the middle vertical plane of the connecting line of the axes of the two cross-flow wind wheels respectively. According to the indoor unit of the air conditioner, the air supply distance of the air outlet is increased, and the effect of meeting the air supply requirement of a user is achieved.

Description

Technical Field

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

[0002] For an indoor unit of an air conditioner with the air inlet and the air outlet on the same side, taking an embedded air conditioner as an example, the air inlet is usually arranged in the middle, and the air outlets are arranged on both sides or around the air inlet. In this technical solution, the total air supply is dispersed at multiple air outlets, resulting in a relatively short air supply distance at each air outlet, and it is difficult to meet the air supply requirements of users in a larger room. Summary of the Utility Model

[0003] In view of the above problems, the present utility model is proposed to provide an indoor unit of an air conditioner that overcomes the above problems or at least partially solves the above problems, aiming to solve the problem that the air supply distance of the existing indoor unit of an air conditioner does not meet the user's requirements.

[0004] Specifically, the present utility model provides the following technical solutions:

[0005] An indoor unit of an air conditioner, comprising a housing and a cross-flow fan.

[0006] The housing includes a front shell. An air outlet and two air inlets on both sides of the air outlet are provided on the front shell.

[0007] The cross-flow fan is rotatably connected to the inside of the housing. There are two cross-flow fans on both sides of the air outlet.

[0008] Wherein, the two air inlets are respectively on both sides of the mid-perpendicular plane of the connection line of the axes of the two cross-flow fans.

[0009] Optionally, heat exchangers are arranged between the air inlets and the cross-flow fans on the same side of the mid-perpendicular plane.

[0010] The included angle between any heat exchanger and the mid-perpendicular plane is 55 - 85 degrees.

[0011] Optionally, any heat exchanger includes a first section and a second section connected in sequence, and the first section is in front of the second section.

[0012] The front surface of the first section forms a first air inlet surface, and the included angle between the first air inlet surface and the mid-perpendicular plane is 55 - 85 degrees.

[0013] Optionally, the front surface of the second section forms a second air inlet surface. The included angle between the second air inlet surface and the mid-perpendicular plane is 5 - 40 degrees.

[0014] Optionally, the front surface of the second section forms a second air inlet surface. The included angle between the first air inlet surface and the second air inlet surface of any one of the heat exchangers is 100-130 degrees.

[0015] Optionally, in any cross-section perpendicular to the central vertical plane, the distance from one end of any one of the first sections close to the central vertical plane to the central vertical plane is less than the distance from the axis of the cross-flow impeller on the same side of the central vertical plane to the central vertical plane.

[0016] Optionally, in any cross-section perpendicular to the central vertical plane, the distance from one end of any one of the air outlets close to the central vertical plane to the central vertical plane is greater than the distance from the axis of the cross-flow impeller on the same side of the central vertical plane to the central vertical plane.

[0017] Optionally, the front ends of the volutes of the two cross-flow impellers are joined, and the included angle between the tangent planes of the front ends of the two volutes at the joint is less than or equal to 75 degrees.

[0018] Optionally, the joint of the front ends of the two volutes is located on the front side of the connection line of the axes of the two cross-flow impellers.

[0019] Optionally, the indoor unit is an embedded air conditioner.

[0020] The axes of the two cross-flow impellers both extend in the vertical direction, and the two cross-flow impellers are arranged at intervals in the left-right direction.

[0021] For an indoor unit of an air conditioner according to the present invention, an air outlet is provided on the front shell, two cross-flow impellers are provided on both sides of the air outlet, and two air inlets are provided on both sides of the central vertical plane of the connection line of the axes of the two cross-flow impellers. That is to say, each of the two cross-flow impellers is connected to an air inlet and shares an air outlet, so that the indoor unit has a large air intake volume, and the air flow is first converged at one place and then blown out, realizing the improvement of the air supply distance of the air outlet and achieving the effect of meeting the air supply requirements of users.

[0022] Furthermore, the indoor unit of the air conditioner according to the present invention is an embedded air conditioner, the axes of the two cross-flow impellers both extend in the vertical direction, and the two cross-flow impellers are arranged at intervals in the left-right direction. That is to say, the indoor unit can realize air intake from the left and right sides of the front shell and air outlet in the middle, and there is no need to reserve air intake or air outlet space on the left and right sides of the indoor unit. The indoor unit can be directly embedded and installed between other buildings or furniture, realizing the effective utilization of indoor space and achieving the effect of improving the applicability and practicality of the indoor unit.

[0023] Based on the following detailed description of the specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will more clearly understand the above and other objects, advantages and features of the present invention. Description of the Drawings

[0024] Some specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings in an illustrative rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0025] Figure 1 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model;

[0026] Figure 2 is a schematic front view of an indoor unit according to an embodiment of the present utility model;

[0027] Figure 3 is a schematic structural diagram of an indoor unit according to an embodiment of the present utility model;

[0028] Figure 4 is a schematic structural diagram of an indoor unit according to an embodiment of the present utility model;

[0029] Figure 5 is a schematic cross-sectional cutaway view of an indoor unit according to an embodiment of the present utility model;

[0030] Figure 6 is a schematic cross-sectional cutaway view of an indoor unit according to an embodiment of the present utility model.

[0031] List of reference numerals:

[0032] 100, housing; 110, front housing; 200, cross-flow fan; 300, air outlet; 400, air inlet; 500, heat exchanger; 510, first section; 520, second section; 530, first air inlet surface; 540, second air inlet surface; 600, mid-vertical plane; 700, volute. Detailed implementation manners

[0033] The following will be described with reference to Figures 1 to 6 the indoor unit of the air conditioner according to the embodiments of the present utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, including one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0034] Unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", "linked", "fixed", "coupled", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to specific circumstances.

[0035] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. That is, in the description of this embodiment, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", or "under" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0036] In the description of this embodiment, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0037] Figure 1 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model, as Figure 1 shown, and with reference to Figures 2 - 6 . The embodiment of the present utility model provides an indoor unit of an air conditioner, and the indoor unit of the air conditioner includes a housing 100 and a cross-flow fan 200.

[0038] The housing 100 includes a front housing 110. An air outlet 300 and two air inlets 400 on both sides of the air outlet 300 are provided on the front housing 110.

[0039] The cross-flow fan 200 is rotatably connected inside the housing 100. There are two cross-flow fans 200 on both sides of the air outlet 300.

[0040] Among them, the two air inlets 400 are respectively located on both sides of the mid-perpendicular plane 600 of the connection line of the axes of the two cross-flow fans 200.

[0041] In this embodiment, the housing 100 may include a front housing 110, a rear housing, side housings, etc. The air outlet 300 and the two air inlets 400 are on the same side of the housing 100, that is, on the front housing 110. In some embodiments, the front housing 110 may also be called a panel or a front panel.

[0042] The indoor unit can be vertically arranged, horizontally arranged or obliquely arranged. As Figure 1 and Figure 3 shown, when the indoor unit is vertically arranged, the air outlet 300 can be in the middle of the front housing 110, and the two air inlets 400 can be in the left and right parts of the front housing 110, and can be on the left and right sides of the air outlet 300. As Figure 4 shown, when the indoor unit is horizontally arranged, the air outlet 300 can be in the middle of the front housing 110, and the two air inlets 400 can be in the upper and lower parts of the front housing 110, and can be on the upper and lower sides of the air outlet 300.

[0043] Since both the air outlet 300 and the air inlets 400 are on the front housing 110, there is no need to set up air inlet or air outlet spaces on other sides of the indoor unit. The indoor unit can be directly embedded and installed between other buildings or furniture (for example, embedded between two cabinets, between two wardrobes, between a wardrobe and the roof, etc.), effectively utilizing the indoor space and achieving the effects of improving the applicability and practicality of the indoor unit.

[0044] In this embodiment, two cross-flow fans 200 are arranged on both sides of the air outlet 300, and two air inlets 400 are arranged on both sides of the mid-perpendicular plane 600 of the connection line of the axes of the two cross-flow fans 200. That is to say, each of the two cross-flow fans 200 is connected to an air inlet 400 and shares an air outlet 300. The two cross-flow fans 200 can be symmetrically or asymmetrically arranged with the mid-perpendicular plane 600 as the center. When arranged symmetrically, the indoor unit has a symmetrical structure, which is convenient for production and manufacturing. When the indoor unit is in the middle of the room, the two cross-flow fans 200 can be symmetrically arranged. When the indoor unit is on one side of the room, the two cross-flow fans 200 can be asymmetrically arranged.

[0045] Each of the two cross-flow fans 200 can be drivingly connected to an independent motor, or they can share a motor, which is not limited here.

[0046] The two cross-flow fans 200 can have the same or different specifications. When the two cross-flow fans 200 have the same specifications, the corresponding air inlets 400, volute casings 700, volute tongues, etc. can adopt the same specifications, which is convenient for production and manufacturing.

[0047] For the indoor unit of the present utility model, each of the two cross-flow fans 200 is connected to an air inlet 400, so that the indoor unit has a relatively large air intake volume. The two cross-flow fans 200 share a common air outlet 300, so that the air flow converges at one place before being blown out, achieving the effect of increasing the air supply distance of the air outlet 300 and meeting the air supply requirements of users.

[0048] In some embodiments of the indoor unit of the present utility model, as Figure 5 shown, a heat exchanger 500 is provided between the air inlet 400 and the cross-flow fan 200 on the same side of the mid-vertical plane 600.

[0049] The included angle a between any heat exchanger 500 and the mid-vertical plane 600 is 55 - 85 degrees.

[0050] The heat exchanger 500 is arranged between the air inlet 400 and the cross-flow fan 200, and can perform temperature adjustment, humidity adjustment and other treatments on the incoming air flow.

[0051] In this embodiment, setting the included angle a between the heat exchanger 500 and the mid-vertical plane 600 to 55 - 85 degrees can guide the incoming air flow entering from the air inlet 400 of the inner front shell 110. On the one hand, it reduces the resistance between the incoming air flow and the heat exchanger 500 and improves the air intake efficiency. On the other hand, it makes the incoming air flow on the front side of the front shell 110 form a preset inclination angle with the front shell 110, avoiding or reducing the interference of the incoming air flow on the outgoing air flow and the influence of the incoming air flow on the blowing distance.

[0052] The smaller the included angle a between the heat exchanger 500 and the mid-vertical plane 600, the less likely the incoming air flow is to interfere with the outgoing air flow. However, the resistance between the incoming air flow and the heat exchanger 500 is also greater. The larger the included angle a between the heat exchanger 500 and the mid-vertical plane 600, the smaller the resistance between the incoming air flow and the heat exchanger 500. However, the incoming air flow is more likely to interfere with the outgoing air flow. 55 - 85 degrees is a better value range after comprehensively considering the above factors.

[0053] In some embodiments of the indoor unit of the present utility model, the included angle a between any heat exchanger 500 and the mid-vertical plane 600 is 75 - 85 degrees. In this way, the resistance between the incoming air flow and the heat exchanger 500 can be appropriately reduced, the air intake efficiency and the air intake volume can be improved, thereby increasing the total air output and the air supply distance and meeting the air supply distance requirements of users in large rooms.

[0054] In some embodiments of the indoor unit of the present utility model, the included angle a between any heat exchanger 500 and the mid-vertical plane 600 is 80 - 85 degrees. In this way, the resistance between the incoming air flow and the heat exchanger 500 can be appropriately reduced, the air intake efficiency and the air intake volume can be improved, thereby increasing the total air output and the air supply distance and meeting the air supply distance requirements of users in large rooms.

[0055] In some embodiments of the indoor unit of the present utility model, such as Figure 6 shown, any heat exchanger 500 includes a first section 510 and a second section 520 connected in sequence, and the first section 510 is located on the front side of the second section 520.

[0056] A first air inlet surface 530 is formed on the front surface of the first section 510, and the angle a between the first air inlet surface 530 and the vertical plane 600 is 55 - 85 degrees.

[0057] The heat exchanger 500 is integrally V-shaped, and the first section 510 and the second section 520 can be fixedly connected or rotatably connected. When the first section 510 and the second section 520 are fixedly connected, the angle c between the first section 510 and the second section 520 is a fixed value. When the first section 510 and the second section 520 are rotatably connected, the angle c between the first section 510 and the second section 520 is an adjustable value.

[0058] In this embodiment, the first section 510 can be the heat exchanger body, and the second section 520 can be an additional section. The angle a between the first air inlet surface 530 and the vertical plane 600 is the same as the angle a between the heat exchanger 500 and the vertical plane 600 in the above several embodiments. By adding the second section 520, the heat exchange area of the heat exchanger 500 can be increased, and the temperature and humidity adjustment effects on the incoming air flow can be improved.

[0059] The value range of the angle a between the first air inlet surface 530 and the vertical plane 600 is the same as that in the above several embodiments, and will not be elaborated here.

[0060] In some embodiments of the indoor unit of the present utility model, such as Figure 6 shown, a second air inlet surface 540 is formed on the front surface of the second section 520. The angle b between the second air inlet surface 540 and the vertical plane 600 is 5 - 40 degrees.

[0061] In this embodiment, the second section 520 can guide the incoming air flow entering from the air inlet 400 of the inner front shell 110. The larger the angle b between the second air inlet surface 540 and the vertical plane 600, the smaller the resistance between the incoming air flow and the heat exchanger 500. However, this will increase the distance between the second section 520 and the corresponding cross-flow fan 200, and will increase the lateral dimension of the housing 100. The smaller the angle b between the second air inlet surface 540 and the vertical plane 600, the smaller the distance between the second section 520 and the corresponding cross-flow fan 200, and the smaller the lateral dimension of the housing 100. However, the resistance between the incoming air flow and the heat exchanger 500 will increase. 5 - 40 degrees is a better value range after comprehensively considering the above factors.

[0062] In some embodiments of the indoor unit of the present utility model, the angle b between the second air inlet surface 540 and the central vertical plane 600 is 5 - 20 degrees. In this way, the distance between the second section 520 and the corresponding cross-flow impeller 200 can be appropriately reduced, and the lateral dimension of the housing 100 can be decreased, thereby improving the air inlet efficiency and reducing the space occupied by the indoor unit.

[0063] In some embodiments of the indoor unit of the present utility model, the angle b between the second air inlet surface 540 and the central vertical plane 600 is 5 - 10 degrees. In this way, the distance between the second section 520 and the corresponding cross-flow impeller 200 can be appropriately reduced, and the lateral dimension of the housing 100 can be decreased, thereby improving the air inlet efficiency and reducing the space occupied by the indoor unit.

[0064] In some embodiments of the indoor unit of the present utility model, as Figure 6 shown, the front surface of the second section 520 forms the second air inlet surface 540. The angle c between the first air inlet surface 530 and the second air inlet surface 540 of any heat exchanger 500 is 100 - 130 degrees.

[0065] In this embodiment, the second section 520 can guide the air inlet flow entering from the air inlet 400 of the inner front shell 110. The larger the angle c between the first air inlet surface 530 and the second air inlet surface 540, the smaller the resistance between the air inlet flow and the heat exchanger 500. However, this will increase the distance between the second section 520 and the corresponding cross-flow impeller 200 and increase the lateral dimension of the housing 100. The smaller the angle c between the first air inlet surface 530 and the second air inlet surface 540, the smaller the distance between the second section 520 and the corresponding cross-flow impeller 200 and the smaller the lateral dimension of the housing 100. However, the resistance between the air inlet flow and the heat exchanger 500 will increase. 100 - 130 degrees is a preferred value range after comprehensively considering the above factors.

[0066] In some embodiments of the indoor unit of the present utility model, the angle c between the first air inlet surface 530 and the second air inlet surface 540 is 100 - 110 degrees. In this way, the distance between the second section 520 and the corresponding cross-flow impeller 200 can be appropriately reduced, and the lateral dimension of the housing 100 can be decreased, thereby improving the air inlet efficiency and reducing the space occupied by the indoor unit.

[0067] In some embodiments of the indoor unit of the present utility model, as Figures 5 - 6 shown, in any cross-section perpendicular to the central vertical plane 600, the distance L1 from one end of any first section 510 close to the central vertical plane 600 to the central vertical plane 600 is less than the distance L2 from the axis of the cross-flow impeller 200 on the same side of the central vertical plane 600 to the central vertical plane 600.

[0068] In this embodiment, the distance L1 is less than the distance L2. On the one hand, the limited space inside the housing 100 can be fully utilized to increase the heat exchange area of the heat exchanger 500. On the other hand, it prompts the incoming air flow outside the first air inlet surface 530 to flow towards the direction close to the central vertical plane 600, thereby guiding the incoming air flow outside the front housing 110 and avoiding or reducing the interference with the blowing air flow.

[0069] In some embodiments of the indoor unit of the present utility model, as Figures 5 - 6 shown, on any cross-section perpendicular to the central vertical plane 600, the distance L3 from the end of any air outlet 300 close to the central vertical plane 600 to the central vertical plane 600 is greater than the distance L2 from the axis center of the cross-flow fan 200 on the same side of the central vertical plane 600 to the central vertical plane 600.

[0070] In this embodiment, the distance L3 is greater than the distance L2. On the one hand, it makes the air inlet 400 far away from the central vertical plane 600, or in other words, makes the air inlet 400 far away from the air outlet 300, avoiding or reducing the interference of the incoming air flow with the blowing air flow. On the other hand, by guiding the incoming air flow through the air inlet 400, the incoming air flow inside the air inlet 400 flows towards the direction close to the cross-flow fan 200 and the central vertical plane 600, that is, the incoming air flow forms a preset inclination angle with the front housing 110, avoiding or reducing the interference of the incoming air flow with the blowing air flow.

[0071] In some embodiments of the indoor unit of the present utility model, as Figures 5 - 6 shown, the front ends of the volutes 700 of the two cross-flow fans 200 are connected, and the included angle d between the tangent planes at the front ends of the two volutes 700 at the connection is less than or equal to 75 degrees.

[0072] The volutes 700 of the cross-flow fan 200 are used to guide the outgoing air flow. If the included angle d is too large, it may cause the outgoing air flows of the two cross-flow fans 200 to collide, resulting in a large wind loss. By restricting the included angle d, the outgoing air flows of the two cross-flow fans 200 can converge smoothly, reducing the loss of air volume and air speed during the convergence process, thereby increasing the total blowing volume and the blowing distance.

[0073] In some embodiments of the indoor unit of the present utility model, the included angle d between the tangent planes at the front ends of the two volutes 700 at the connection of the two cross-flow fans 200 is 55 - 65 degrees.

[0074] In some embodiments of the indoor unit of the present utility model, as Figures 5 - 6 shown, the connection of the front ends of the two volutes 700 is located in front of the connection line of the axis centers of the two cross-flow fans 200. In this way, the outgoing air flow can be further guided, avoiding or reducing the loss of air volume and air speed during the convergence process of the outgoing air flows of the two cross-flow fans 200, thereby increasing the total blowing volume and the blowing distance.

[0075] In some embodiments of the indoor unit of the present utility model, the indoor unit is an embedded air conditioner. For example, Figure 1 and Figure 3 as shown, the axes of the two cross-flow fans 200 both extend in the vertical direction, and the two cross-flow fans 200 are arranged at intervals in the left-right direction.

[0076] In this embodiment, the indoor unit is an embedded air conditioner. The axes of the two cross-flow fans 200 both extend in the vertical direction, and the two cross-flow fans are arranged at intervals in the left-right direction. That is to say, the indoor unit can realize air intake from the left and right sides of the front shell 110 and air outlet in the middle. There is no need to reserve air intake or air outlet space on the left and right sides of the indoor unit. The indoor unit can be directly embedded and installed between other buildings or furniture, effectively utilizing the indoor space and achieving the effects of improving the applicability and practicality of the indoor unit.

[0077] At this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present utility model have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present utility model can still be directly determined or derived based on the content disclosed in the present utility model without departing from the spirit and scope of the present utility model. Therefore, the scope of the present utility model should be understood and determined to cover all these other variations or modifications.

Claims

1. An air conditioner indoor unit, characterized in that: include: A housing, the housing comprising a front housing; the front housing is provided with an air outlet and two air inlets on both sides of the air outlet; A crossflow wind wheel, the crossflow wind wheel is rotatably connected in the housing; the crossflow wind wheel is two on both sides of the air outlet; The two air inlets are respectively located on both sides of a perpendicular midplane of a line connecting the axes of the two crossflow wind wheels.

2. The indoor unit according to claim 1, characterized in that: A heat exchanger is provided between the air inlet and the crossflow impeller on the same side of the mid-vertical plane; The included angle between any of the heat exchangers and the mid-vertical plane is 55-85 degrees.

3. The indoor unit according to claim 2, characterized in that: Any of the heat exchangers comprises a first section and a second section connected in sequence, wherein the first section is located in front of the second section; The front surface of the first section forms a first air inlet surface, and the angle between the first air inlet surface and the mid-vertical plane is 55-85 degrees.

4. The indoor unit according to claim 3, characterized in that: The front surface of the second section forms a second air inlet surface; the angle between the second air inlet surface and the mid-vertical plane is 5-40 degrees.

5. The indoor unit according to claim 3, characterized in that: The front surface of the second section forms a second air inlet surface; the angle between the first air inlet surface and the second air inlet surface of any heat exchanger is 100-130 degrees.

6. The indoor unit according to claim 3, characterized in that: On any cross section perpendicular to the mid-vertical plane, the distance between one end of any first section close to the mid-vertical plane and the mid-vertical plane is smaller than the distance between the axis of the cross-flow impeller on the same side of the mid-vertical plane and the mid-vertical plane.

7. The indoor unit according to claim 1, characterized in that: On any cross section perpendicular to the mid-vertical plane, the distance between one end of any air outlet close to the mid-vertical plane and the mid-vertical plane is greater than the distance between the axis of the cross-flow impeller on the same side of the mid-vertical plane and the mid-vertical plane.

8. The indoor unit according to claim 1, characterized in that: The front ends of the volutes of the two crossflow impellers are connected, and the included angle of the tangent planes of the front ends of the two volutes at the connection is less than or equal to 75 degrees.

9. The indoor unit according to claim 8, characterized in that: The connection point of the front ends of the two volutes is located in front of the line connecting the axes of the two crossflow impellers.

10. The indoor unit according to claim 1, characterized in that: The indoor unit is an embedded air conditioner; The axes of the two crossflow wind wheels extend in the vertical direction, and the two crossflow wind wheels are arranged at intervals in the left-right direction.

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