Air conditioner

Abstract

The present invention discloses an air conditioner, which includes a housing, a heat exchanger and a centrifugal fan. The heat exchanger and the centrifugal fan are arranged inside the housing. An air conditioner air return opening and an air conditioner air outlet are provided on the housing, and both the air conditioner air return opening and the air conditioner air outlet are located on the first panel of the housing; the heat exchanger is inclinedly arranged at the air conditioner air return opening, and there is a first included angle h between the plane where the length of the heat exchanger is located and the first panel, and the first included angle h is less than 90°; there is a second included angle i between the air outlet direction plane of the centrifugal fan and the plane where the length of the heat exchanger is located, and the value range of the second included angle i is 10°-20°, and the included angle between the air outlet direction plane of the centrifugal fan and the first panel is less than 90°. The air conditioner of the present invention can increase the heat exchange area of the heat exchanger, improve the fan efficiency and air volume through the layout inside the air conditioner within the same housing size.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and more particularly, to an air conditioner. Background Art

[0002] In the prior art, an air conditioner (especially a duct type air conditioner) generally includes a heat exchanger and a blower. According to the user's usage habits and for the convenience of installing the air duct, the air return opening 101 and the air outlet 102 of the air conditioner are generally designed on the same side panel 103 and are adjacent to each other left and right, as Figure 1 shown. At present, air conditioners are developing towards miniaturization design to reduce material and transportation costs. However, in the air conditioner in the prior art as Figure 1 shown, within the same housing size, the layout inside the air conditioner results in a small heat exchange area of the heat exchanger 104, low efficiency of the blower 105, and small air volume. When the unit needs to increase the heat exchange area and improve the air volume, it can only increase the housing size to meet the requirements, and the corresponding air conditioner material cost and transportation cost will increase accordingly. Summary of the Invention

[0003] An air conditioner is provided in an embodiment of the present invention to solve the problem that in the prior art, within the same housing size of the air conditioner, the layout inside the air conditioner results in a small heat exchange area of the heat exchanger, low efficiency of the blower, and small air volume.

[0004] To achieve the above object, the present invention provides an air conditioner, including a housing, a heat exchanger, and a centrifugal blower. The heat exchanger and the centrifugal blower are arranged inside the housing. An air return opening and an air outlet of the air conditioner are arranged on the housing. Both the air return opening and the air outlet are located on a first panel of the housing. The heat exchanger is inclinedly arranged at the air return opening. There is a first angle h between the plane where the length of the heat exchanger is located and the first panel, and the first angle h is less than 90°. There is a second angle i between the air outlet direction plane of the centrifugal blower and the plane where the length of the heat exchanger is located. The value range of the second angle i is 10° - 20°, and the angle between the air outlet direction plane of the centrifugal blower and the first panel is less than 90°.

[0005] Further, the centrifugal blower includes a first air inlet, and the first air inlet is located on the side close to the heat exchanger in the axial direction of the centrifugal blower. The distance between the first air inlet and the heat exchange surface of the heat exchanger is n, and n≥250mm.

[0006] Further, the centrifugal blower further includes a second air inlet, and the second air inlet is symmetrically arranged with the first air inlet. The second air inlet is located on the side close to the inner wall of the housing in the axial direction of the centrifugal blower. The distance between the second air inlet and the corresponding inner wall of the housing is d, and d≥200mm.

[0007] Further, the housing further includes a rear wall panel disposed opposite to the first panel. The heat exchanger and the centrifugal fan are located between the first panel and the rear wall panel. The shortest distance between the outer casing of the centrifugal fan and the rear wall panel is r, and r≥130mm.

[0008] Further, the heat exchanger has a length, a width, and a thickness, wherein the length is greater than the width and the length is greater than the thickness.

[0009] Further, there is a first included angle h between the plane where the length of the heat exchanger is located and the first panel, satisfying the following formula: (f - 300mm) / k < cos(B) < f / k, B ≤ h ≤ B + 15°; where f is the width of the air return opening of the air conditioner, and k is the length of the heat exchanger.

[0010] Further, the length of the first panel is a, the width of the air return opening of the air conditioner is f, the width of the air outlet of the air conditioner is g, and the distance between the air return opening and the air outlet of the air conditioner in the width direction of the first panel is e. The distance relationship satisfies the following formula: a = g + f + e + A, where A is a structural assembly design margin parameter.

[0011] Further, the value range of A is between 100mm and 200mm.

[0012] Further, the width of the air outlet of the centrifugal fan is equal to the width of the air outlet of the air conditioner.

[0013] According to another aspect of the present invention, there is provided an air conditioner, including a housing and a heat exchanger. The heat exchanger is disposed inside the housing. An air return opening of the air conditioner is provided on the housing, and the air return opening is located on the first panel of the housing; the heat exchanger is disposed obliquely at the air return opening, and there is a first included angle h between the plane where the length of the heat exchanger is located and the first panel, and the first included angle h is less than 90°; the first included angle h satisfies the following formula: (f - 300mm) / k < cos(B) < f / k, B ≤ h ≤ B + 15°; where f is the width of the air return opening of the air conditioner, and k is the length of the heat exchanger.

[0014] Further, the heat exchanger has a length, a width, and a thickness, wherein the length is greater than the width and the length is greater than the thickness.

[0015] Further, an air outlet of the air conditioner is further provided on the housing. The air return opening and the air outlet of the air conditioner are both located on the first panel of the housing; the length of the first panel is a, the width of the air return opening of the air conditioner is f, the width of the air outlet of the air conditioner is g, and the distance between the air return opening and the air outlet of the air conditioner in the width direction of the first panel is e. The distance relationship satisfies the following formula: a = g + f + e + A, where A is a structural assembly design margin parameter.

[0016] Further, the value range of A is between 100mm and 200mm.

[0017] Furthermore, the air conditioner further includes a centrifugal fan, which is disposed inside the housing. There is a second included angle i between the air outlet direction surface of the centrifugal fan and the plane where the length of the heat exchanger is located. The value range of the second included angle i is 10°-20°, and the included angle between the air outlet direction surface of the centrifugal fan and the first panel is less than 90°.

[0018] Furthermore, the centrifugal fan includes a first air inlet, which is located on the side close to the heat exchanger in the axial direction of the centrifugal fan; the distance between the first air inlet and the heat transfer surface of the heat exchanger is n, and n≥250mm.

[0019] Furthermore, the centrifugal fan further includes a second air inlet, which is symmetrically arranged with the first air inlet. The second air inlet is located on the side close to the inner wall of the housing in the axial direction of the centrifugal fan. The distance between the second air inlet and the corresponding inner wall of the housing is d, and d≥200mm.

[0020] Furthermore, the housing further includes a rear wall panel disposed opposite to the first panel. The heat exchanger and the centrifugal fan are located between the first panel and the rear wall panel. The shortest distance between the outer shell of the centrifugal fan and the rear wall panel is r, and r≥130mm.

[0021] Furthermore, the width of the air outlet of the centrifugal fan is equal to the width of the air outlet of the air conditioner.

[0022] In the present invention, the heat exchanger is inclinedly disposed at the air return opening of the air conditioner, which can maximize the heat transfer area of the heat exchanger. Moreover, the position of the centrifugal fan is adjusted so that the position of the centrifugal fan is inclinedly matched with the heat exchanger. The position setting of the centrifugal fan can make the air flow smoother, and the overall air field uniformity is better. This not only improves the efficiency of the fan but also increases the air volume. The air conditioner of the present invention can layout and increase the heat exchanger area and enhance the air volume within the fixed and limited housing size of the air conditioner, without increasing the size of the air conditioner housing, without increasing the material cost and transportation cost, and can better exert the capacity of the fan, with good overall air field uniformity and high air field efficiency. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the internal structure of an air conditioner in the prior art;

[0024] Figure 2 is a schematic diagram of the internal structure of the air conditioner according to the first embodiment of the present invention;

[0025] Figure 3 is a streamline diagram of air flow simulation of the first solution of the air conditioner according to the first embodiment of the present invention;

[0026] Figure 4 is a velocity cloud diagram of the heat exchanger surface of the first solution of the air conditioner according to the first embodiment of the present invention;

[0027] Figure 5 It is the air flow simulation streamline diagram of the second solution of the air conditioner in the first embodiment of the present invention;

[0028] Figure 6 It is the surface velocity contour map of the heat exchanger of the second solution of the air conditioner in the first embodiment of the present invention;

[0029] Figure 7 It is the air flow simulation streamline diagram of the air conditioner in the prior art;

[0030] Figure 8 It is the surface velocity contour map of the heat exchanger of the air conditioner in the prior art. Detailed implementation manners

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation to the present invention.

[0032] Refer to Figure 2 As shown, according to the first embodiment of the present invention, an air conditioner (preferably a duct machine) is provided. The air conditioner includes a housing, a heat exchanger 10, and a centrifugal fan 20. The heat exchanger 10 and the centrifugal fan 20 are arranged inside the housing. An air conditioner return air inlet 31 and an air conditioner air outlet 32 are provided on the housing, and both the air conditioner return air inlet 31 and the air conditioner air outlet 32 are located on the first panel 33 of the housing. The heat exchanger 10 is inclinedly arranged at the air conditioner return air inlet 31. There is a first included angle h between the plane where the length of the heat exchanger 10 is located and the first panel 33, and the first included angle h is less than 90°.

[0033] There is a second included angle i between the air outlet direction plane of the centrifugal fan 20 and the plane where the length of the heat exchanger 10 is located. The value range of the second included angle i is 10° - 20°, and the included angle between the air outlet direction plane of the centrifugal fan 20 and the first panel 33 is less than 90°.

[0034] In the present invention, the heat exchanger is inclinedly arranged at the air conditioner return air inlet, which can maximize the heat exchange area of the heat exchanger. Moreover, the position of the centrifugal fan is adjusted to make the position of the centrifugal fan match the inclination of the heat exchanger. The position setting of the centrifugal fan can make the air flow smoother, and the overall air field uniformity is better. It not only improves the efficiency of the fan but also increases the air volume. The air conditioner of the present invention can layout and increase the heat exchanger area and lift the air volume within the fixed and limited size of the housing of the air conditioner without increasing the size of the air conditioner housing and without increasing the material cost and transportation cost, better exert the ability of the fan, with good overall air field uniformity and high air field efficiency.

[0035] It needs to be specifically stated Figure 2 For the structure shown, the air outlet direction plane of the centrifugal fan 20, that is, the direction of the air flow at the air outlet of the centrifugal fan 20, is generally perpendicular to the fan shaft of the centrifugal fan 20, and Figure 2The blower housing of the medium centrifugal blower 20 has a housing side surface, on which a first air inlet 21 and a second air inlet 22 are respectively arranged. The plane where the housing side surface is located is parallel to the air outlet direction plane of the centrifugal blower 20. The plane where the length of the heat exchanger is located refers to the plane where the longest part of the heat exchanger is located and the relevant parallel outer surfaces. Moreover, the structure of the heat exchanger 10 has a length, a width and a thickness, and the length of its structure is greater than the width and the length is greater than the thickness. If the heat exchanger is Figure 2 as shown in the rectangle, then the plane where the length of the heat exchanger is located is the plane where the length k is marked, and the plane where the length of the heat exchanger is located can also be the plane where the outer surface with the largest area in the heat exchanger is located. Generally speaking, the plane where the length of the heat exchanger is located represents the heat transfer surface with the largest heat transfer area of the heat exchanger.

[0036] Combined with Figure 1 the internal structure of the air conditioner in the prior art shown and Figure 7 、 8 the air volume simulation diagrams shown, it can be clearly seen that the heat transfer area of the air conditioner in the prior art is lower and the non-uniformity of the air volume distribution is higher. Combined with Figure 2 the internal structure of the air conditioner of the present invention shown and Figure 3 、 4 the air volume simulation diagrams shown, compared with the prior art, the heat transfer area of the air conditioner is higher and the non-uniformity of the air volume distribution is lower.

[0037] Refer to Figure 2 the internal structure diagram of the air conditioner in the top view direction shown. Further preferably, the centrifugal blower 20 includes a first air inlet 21, and the first air inlet 21 is located on one side of the centrifugal blower 20 close to the heat exchanger 10 in the axial direction; the distance between the first air inlet 21 and the heat transfer surface of the heat exchanger 10 is n, and n≥250mm. It should be particularly noted that n is the minimum distance between the first air inlet 21 and the heat transfer surface of the heat exchanger 10 (which can be the perpendicular distance between the center point of the first air inlet 21 and the heat transfer surface). Combined with Figure 2 it is further explained that the heat transfer surface of the heat exchanger 10 is the heat transfer surface that can be formed by the structure of the heat exchanger itself, generally referring to the outer surface with the largest area in the heat exchanger 10, Figure 2 the annotation n in shows the specific relationship, and n can also be understood as the distance between the air inlet surface of the first air inlet 21 and the heat transfer surface of the heat exchanger 10 (i.e., the above-mentioned minimum distance). By setting the positional relationship between the centrifugal blower 20 and the heat exchanger 10, the air volume can be effectively increased, and the ability of the blower can be better exerted. For data parameters, etc., refer to Table 1.

[0038] Preferably, the centrifugal fan 20 further includes a second air inlet 22, which is symmetrically arranged with the first air inlet 21. The second air inlet 22 is located on one side close to the inner wall of the housing in the axial direction of the centrifugal fan 20, and the distance between the second air inlet 22 and the corresponding inner wall of the housing is d, where d≥200mm. In this embodiment, the housing of the air conditioner includes two side plates arranged oppositely, and the two side plates are connected to both sides of the first panel 33. d is the distance between the second air inlet 22 and the closest side plate. Of course, in other embodiments, the housing of the air conditioner may have other shapes, and then the inner wall of the housing corresponding to the second air inlet 22 is: along the axial direction of the centrifugal fan, the inner wall portion pointed outward from the second air inlet 22 towards the centrifugal fan.

[0039] By adjusting the distance between the centrifugal fan 20 and the inner wall of the housing, the air flow can effectively enter the centrifugal fan through the second air inlet 22, thereby increasing the air volume. Refer to Figure 3 and Figure 5 , and it can be clearly seen that the air flow entering from the second air inlet 22 has increased.

[0040] Combined with Figure 2 , the housing of the air conditioner further includes a rear wall panel arranged opposite to the first panel 33. The heat exchanger 10 and the centrifugal fan 20 are located between the first panel 33 and the rear wall panel. The shortest distance between the outer shell of the centrifugal fan 20 and the rear wall panel is r, where r≥130mm. By adjusting the position of the centrifugal fan 10 and the rear wall panel, it can be seen from Figure 3 and Figure 5 that this adjustment effectively increases the air volume, can better exert the capacity of the fan, the overall air field uniformity is better, and the air field efficiency is higher. For data parameters, etc., refer to Table 1.

[0041] Now, according to the above-mentioned preferred improvements, the air volume inside the air conditioner is simulated. Among them, in the embodiments of the present invention, the simulations of Scheme 1 and Scheme 2 are given. The main difference between the schemes is that the numerical values of the parameters are adjusted, and specific data are simulated. Among them, Figure 7 and Figure 8 are the simulation diagrams of the air conditioner in the prior art, Figures 3 to 6 is the simulation diagram of the embodiment of the present invention. For details, refer to Table 1:

[0042]

[0043] The results in Table 1 show that:

[0044] Assume that the air volume ratio is the percentage of the air volume corresponding to each copper tube in the total ventilation air volume of the heat exchanger, and the air volume non-uniformity is the ratio of the maximum to the minimum percentage. The air volume difference between Scheme 1 and Scheme 2 is 1.6%, and the air volumes are basically the same. The heat transfer areas of Scheme 1 and Scheme 2 are the same, and the difference in the air volume distribution non-uniformity is very small, so the air volume distribution uniformity is relatively close. In the present invention, the distance r between Scheme 1 and Scheme 2 is all ≥ 130 mm. If the r distance is too small, it will cause obvious unilateral air suction of the fan, and the work capacity of the fan will be severely attenuated. On the contrary, for Scheme 3 of the prior art, the air volume distribution uniformity on the surface of the heat exchanger decreases significantly. And the heat exchanger area of this layout is relatively small, reduced by 12.9%, seriously affecting the heat transfer effect.

[0045] In this embodiment, the structure of the heat exchanger 10 has a length, a width, and a thickness. Among them, the length is greater than the width and the length is greater than the thickness. Preferably, there is a first included angle h between the plane where the length of the heat exchanger 10 is located and the first panel 33. See Figure 2 Structure, the first included angle h satisfies the following formula:

[0046] (f - 300 mm) / k < cos(B) < f / k, B ≤ h ≤ B + 15°; where f is the width of the air return opening 31 of the air conditioner, and k is the length of the heat exchanger 10.

[0047] Since air conditioners are currently developing towards miniaturization to reduce material and transportation costs, in a limited shell space with a fixed height, it is necessary to maximize the heat transfer area of the heat exchanger according to the area of the air return opening. Therefore, the present invention adjusts the first included angle h between the plane where the length of the heat exchanger 10 is located and the first panel 33 to increase the heat transfer area of the heat exchanger. In the present invention, the angle of the first included angle h is adjusted according to the width of the air return opening 31 of the air conditioner, so that the heat transfer surface of the heat exchanger can correspond to the air return opening of the air conditioner, and the heat transfer area of the heat exchanger can be adjusted to the maximum. The width of the air return opening 31 of the air conditioner refers to the maximum width value of the air return opening 31 of the air conditioner.

[0048] The length of the first panel 33 is a, the width of the air return opening 31 of the air conditioner is f, the width of the air outlet 32 of the air conditioner is g, and the distance between the air return opening 31 and the air outlet 32 of the air conditioner in the width direction of the first panel 33 is e. The distance relationship satisfies the following formula: a = g + f + e + A, where A is a structural assembly design margin parameter. Without changing the external dimensions of the air conditioner, the width of the air return opening 31 of the air conditioner is adjusted to be the same as the width of the air outlet, thereby increasing the width of the air return opening and the area of the air return opening in the layout design. Preferably, the value range of A is between 100 mm and 200 mm.

[0049] See Figure 2, the width of the air outlet 23 of the centrifugal fan 20 is equal to that of the air outlet 32 of the air conditioner. The air outlet 23 of the centrifugal fan 20 is arranged facing the air outlet 32 of the air conditioner. Generally, a duct structure is arranged between the air outlet 23 of the centrifugal fan 20 and the air outlet 32 of the air conditioner to guide the air flow.

[0050] See Figure 2 As shown, according to the second embodiment of the present invention, an air conditioner is provided, which includes a housing and a heat exchanger 10. The heat exchanger 10 is arranged inside the housing. An air return opening 31 of the air conditioner is arranged on the housing, and the air return opening 31 is located on the first panel 33 of the housing; the heat exchanger 10 is arranged obliquely at the air return opening 31, and there is a first included angle h between the plane where the length of the heat exchanger 10 is located and the first panel 33, and the first included angle h is less than 90°; the first included angle h satisfies the following formula: (f - 300 mm) / k < cos(B) < f / k, B ≤ h ≤ B + 15°; where f is the width of the air return opening 31 of the air conditioner, and k is the length of the heat exchanger 10. The width of the air return opening 31 refers to the maximum width value of the air return opening 31.

[0051] Since air conditioners are currently developing towards miniaturization to reduce material and transportation costs, within the limited housing space of a fixed height, it is necessary to maximize the heat exchange area of the heat exchanger according to the area of the air return opening. Therefore, in this embodiment, the first included angle h between the plane where the length of the heat exchanger 10 is located and the first panel 33 is adjusted to increase the heat exchange area of the heat exchanger. In the present invention, the angle of the first included angle h is adjusted according to the width of the air return opening 31 of the air conditioner, so that the heat exchange surface of the heat exchanger can correspond to the air return opening of the air conditioner, and the heat exchange area of the heat exchanger can be adjusted to the maximum. Arranging the heat exchanger obliquely at the air return opening of the air conditioner can maximize the heat exchange area of the heat exchanger. Moreover, for the centrifugal fan associated with the position of the heat exchanger, its position can be further adjusted so that the position of the centrifugal fan matches the inclination of the heat exchanger. Because there is space for adjustment, the centrifugal fan has enough space for adjustment to make the air flow smoother, and thus the overall air field uniformity is better, which not only improves the efficiency of the fan but also increases the air volume.

[0052] It should be noted that the structure of the heat exchanger 10 has a length, a width, and a thickness, where the length is greater than the width and the length is greater than the thickness. The plane where the length of the heat exchanger is located refers to the plane where the longest part of the heat exchanger is located and the related parallel outer surfaces. If the heat exchanger is Figure 2 a rectangle as shown, then the plane where the length of the heat exchanger is located is the plane marked with the length k. The plane where the length of the heat exchanger is located can also be the plane where the outer surface with the largest area of the heat exchanger is located. Generally speaking, the plane where the length of the heat exchanger is located represents the heat exchange surface with the largest heat exchange area of the heat exchanger.

[0053] Preferably, an air-conditioning air outlet 32 is further provided on the housing. Both the air-conditioning air return inlet 31 and the air-conditioning air outlet 32 are located on the first panel 33 of the housing. The length of the first panel 33 is a, the width of the air-conditioning air return inlet 31 is f, the width of the air-conditioning air outlet 32 is g, and the distance between the air-conditioning air return inlet 31 and the air-conditioning air outlet 32 in the width direction of the first panel 33 is e. The distance relationship satisfies the following formula: a = g + f + e + A, where A is a structural assembly design margin parameter. Without changing the external dimensions of the air conditioner, the width of the air-conditioning air return inlet 31 is adjusted to be the same as the width of the air-conditioning air outlet, thereby increasing the width of the air return inlet and the area of the air return inlet in the layout design. Preferably, the value range of A is between 100 mm and 200 mm.

[0054] The air conditioner further includes a centrifugal fan 20. The centrifugal fan 20 is disposed inside the housing. There is a second included angle i between the air outlet direction surface of the centrifugal fan 20 and the plane where the length of the heat exchanger 10 is located. The value range of the second included angle i is 10° - 20°, and the included angle between the air outlet direction surface of the centrifugal fan 20 and the first panel 33 is less than 90°. The heat exchanger is inclinedly disposed at the air-conditioning air return inlet, which can maximize the heat exchange area of the heat exchanger. Moreover, the position of the centrifugal fan is adjusted so that the position of the centrifugal fan is inclinedly matched with the heat exchanger. The position setting of the centrifugal fan can make the air flow smoother and the overall air field uniformity better, not only improving the efficiency of the fan but also increasing the air volume.

[0055] The centrifugal fan 20 includes a first air inlet 21. The first air inlet 21 is located on one side of the centrifugal fan 20 in the axial direction close to the heat exchanger 10. The distance between the first air inlet 21 and the heat exchange surface of the heat exchanger 10 is n, and n ≥ 250 mm. It should be particularly noted that n is the minimum distance between the first air inlet 21 and the heat exchange surface of the heat exchanger 10 (which can be the perpendicular distance between the center point of the first air inlet 21 and the heat exchange surface). Figure 2 Furthermore, the heat exchange surface of the heat exchanger 10 is the heat exchange surface formed by the structure of the heat exchanger itself, generally referring to the outer surface with the largest area in the heat exchanger 10. Figure 2 The annotation n in [reference] shows the specific relationship, and n can also be understood as the distance between the air inlet surface of the first air inlet 21 and the heat exchange surface of the heat exchanger 10 (i.e., the above-mentioned minimum distance). By setting the positional relationship between the centrifugal fan 20 and the heat exchanger 10, the air volume can be effectively increased and the ability of the fan can be better exerted.

[0056] The centrifugal fan 20 further includes a second air inlet 22, which is symmetrically arranged with the first air inlet 21. The second air inlet 22 is located on one side of the centrifugal fan 20 close to the inner wall of the housing in the axial direction. The distance between the second air inlet 22 and the corresponding inner wall of the housing is d, and d≥200mm. In this embodiment, the housing of the air conditioner includes two side plates arranged oppositely, and the two side plates are connected to both sides of the first panel 33. d is the distance between the second air inlet 22 and the closest side plate. Of course, in other embodiments, the housing of the air conditioner may have other shapes, then the inner wall of the housing corresponding to the second air inlet 22 is: along the axial direction of the centrifugal fan, the inner wall part pointed outward from the second air inlet 22 towards the centrifugal fan.

[0057] By adjusting the distance between the centrifugal fan 20 and the inner wall of the housing, the air flow can effectively enter the centrifugal fan through the second air inlet 22, thereby increasing the air volume. Refer to Figure 3 and Figure 5 , it can be clearly seen that the air flow entering from the second air inlet 22 has increased.

[0058] The housing further includes a rear wall panel arranged opposite to the first panel 33. The heat exchanger 10 and the centrifugal fan 20 are located between the first panel 33 and the rear wall panel. The shortest distance between the outer shell of the centrifugal fan 20 and the rear wall panel is r, and r≥130mm. By adjusting the position between the centrifugal fan 10 and the rear wall panel, it can be seen from Figure 3 and Figure 5 that this adjustment effectively increases the air volume, can better exert the capacity of the fan, the overall air field uniformity is better, and the air field efficiency is higher.

[0059] Preferably, the width of the air outlet of the centrifugal fan 20 is equal to that of the air outlet 32 of the air conditioner. The air outlet 23 of the centrifugal fan 20 is arranged towards the air outlet 32 of the air conditioner. Generally, there is a duct structure between the air outlet 23 of the centrifugal fan 20 and the air outlet 32 of the air conditioner to guide the outgoing air flow.

[0060] In the air conditioner of the present invention, within the fixed and limited size of the housing, without increasing the size of the air conditioner housing and without increasing the material cost and transportation cost, the heat exchanger area can be increased in layout, the air volume can be increased, the capacity of the fan can be better exerted, the overall air field uniformity is good, and the air field efficiency is high. It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0061] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0062] Of course, the above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the basic principles of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. An air conditioner, comprising a housing, a heat exchanger (10) and a centrifugal fan (20), wherein the heat exchanger (10) and the centrifugal fan (20) are arranged inside the housing, and is characterized in that, an air conditioner return air inlet (31) and an air conditioner air outlet (32) are arranged on the housing, and both the air conditioner return air inlet (31) and the air conditioner air outlet (32) are located on a first panel (33) of the housing; the heat exchanger (10) is inclinedly arranged at the air conditioner return air inlet (31), and there is a first included angle h between the plane where the length of the heat exchanger (10) is located and the first panel (33), and the first included angle h is less than 90°; there is a second included angle i between the air outlet direction plane of the centrifugal fan (20) and the plane where the length of the heat exchanger (10) is located, the value range of the second included angle i is 10° - 20°, and the included angle between the air outlet direction plane of the centrifugal fan (20) and the first panel (33) is less than 90°; the centrifugal fan (20) includes a first air inlet (21), and the first air inlet (21) is located on one side close to the heat exchanger (10) in the axial direction of the centrifugal fan (20); the centrifugal fan (20) further includes a second air inlet (22), and the second air inlet (22) is symmetrically arranged with the first air inlet (21), and the second air inlet (22) is located on one side close to the inner wall of the housing in the axial direction of the centrifugal fan (20).

2. The air conditioner according to claim 1, characterized in that, the distance between the first air inlet (21) and the heat exchange surface of the heat exchanger (10) is n, and n≥250mm.

3. The air conditioner according to claim 2, wherein, the distance between the second air inlet (22) and the corresponding inner wall of the housing is d, and d≥200mm.

4. The air conditioner according to claim 1, characterized in that, the housing further includes a rear wall panel oppositely arranged with the first panel (33), the heat exchanger (10) and the centrifugal fan (20) are located between the first panel (33) and the rear wall panel, and the shortest distance between the outer shell of the centrifugal fan (20) and the rear wall panel is r, and r≥130mm.

5. The air conditioner according to claim 1, characterized in that, the structure of the heat exchanger (10) has a length, a width and a thickness, wherein the length is greater than the width and the length is greater than the thickness.

6. The air conditioner according to claim 1, characterized in that, There is a first included angle h between the plane where the length of the heat exchanger (10) is located and the first panel (33), and it satisfies the following formula: (f - 300mm) / k < cos(B) < f / k, B ≤ h ≤ B + 15°; wherein, f is the width of the air conditioner return air inlet (31), and k is the length of the heat exchanger (10).

7. The air conditioner according to claim 1, characterized in that, The length of the first panel (33) is a, the width of the air conditioner return air inlet (31) is f, the width of the air conditioner air outlet (32) is g, and the distance between the air conditioner return air inlet (31) and the air conditioner air outlet (32) in the width direction of the first panel (33) is e. The distance relationship satisfies the following formula: a = g + f + e + A, where A is a structural assembly design margin parameter.

8. The air conditioner according to claim 7, characterized in that, The value range of A is between 100mm and 200mm.

9. The air conditioner according to claim 1, characterized in that, The width of the air outlet (23) of the centrifugal fan (20) is equal to the width of the air outlet (32) of the air conditioner.

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