Air conditioner indoor unit and heat exchanger thereof

Abstract

The heat exchanger comprises a first heat exchange part, a second heat exchange part and a third heat exchange part, the first heat exchange part comprises a first assembly end face assembled with the second heat exchange part, and the second heat exchange part comprises a second assembly end face assembled with the first heat exchange part. The first assembly end surface of the first heat exchange part is in contact with the second assembly surface of the second heat exchange part through two surfaces; the second heat exchange part comprises a first assembling end face assembled with the third heat exchange part, the third heat exchange part comprises a second assembling end face assembled with the second heat exchange part, and the first assembling end face of the second heat exchange part is in contact with the second assembling end face of the third heat exchange part through two faces. Every two adjacent heat exchange parts are achieved through contact of two faces, better self-sealing lap joint can be achieved, air leakage at the lap joint position is prevented, the air supply uniformity is improved, and the risks of condensation, water dripping, water condensation and storage, poor flow division and low heat exchange efficiency are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of air-conditioning equipment, and specifically relates to an air-conditioning indoor unit and a heat exchanger thereof. Background Art

[0002] The air conditioner indoor unit is equipped with a heat exchanger, which is connected to the refrigerant circulation system to release heat or cold to adjust the temperature, humidity, etc. of the space where the indoor unit is located.

[0003] The heat exchanger in a wall-mounted air conditioner indoor unit typically features a three-fold structure, connected by splicing. However, due to the lack of custom-cut components or improperly designed custom-cut components, the three folds of the heat exchanger are connected at point contact. This results in poor airflow uniformity, indirectly leading to condensation, dripping, condensate accumulation, poor flow diversion, and low heat exchange efficiency.

[0004] In addition, before the three-fold heat exchanger in the industry is cut into pieces, the middle and end special-shaped cuts of the special-shaped cutting design are inconsistent, which means that two special-shaped cutting dies must be installed on the mold to achieve punching production, resulting in higher mold costs.

[0005] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0006] The utility model provides an air-conditioning indoor unit and a heat exchanger thereof, so as to solve the technical problem that two adjacent folds of the heat exchanger of the existing air-conditioning indoor unit are in point contact, resulting in poor air supply uniformity.

[0007] In order to achieve the above-mentioned utility model / design purpose, this utility model adopts the following technical solutions:

[0008] A heat exchanger for an air conditioner indoor unit includes a first heat exchange part, a second heat exchange part and a third heat exchange part.

[0009] The first heat exchange portion includes a first assembly end surface assembled with the second heat exchange portion, the second heat exchange portion includes a second assembly end surface assembled with the first heat exchange portion, the first assembly end surface includes a first arcuate contact surface and a first plane contact surface, the second assembly end surface includes a second arcuate contact surface and a second plane contact surface, and when the first heat exchange portion and the second heat exchange portion are assembled, the first arcuate contact surface of the first heat exchange portion contacts the second arcuate contact surface of the second heat exchange portion, and the first plane contact surface of the first heat exchange portion contacts the second plane contact surface of the second heat exchange portion;

[0010] The second heat exchange part includes a first assembly end surface assembled with the third heat exchange part, and the third heat exchange part includes a second assembly end surface assembled with the second heat exchange part; the first assembly end surface includes a plane, and the second assembly end surface includes a second plane contact surface and a connecting side surface. When the second heat exchange part is assembled with the third heat exchange part, the second plane contact surface of the third heat exchange part contacts the inner side surface of the second heat exchange part, and the connecting side surface of the third heat exchange part contacts the plane of the second heat exchange part.

[0011] In the heat exchanger of the air-conditioning indoor unit as described above, the first plane contact surface and the first arc contact surface are continuously arranged, the second plane contact surface and the second arc contact surface are continuously arranged; the plane and the inner side surface are continuously arranged, and the connecting side surface and the second plane contact surface are continuously arranged.

[0012] As described above, the heat exchanger of the air-conditioning indoor unit, the second assembly end face has an outer end face connected to the outer side face of the heat exchange portion in which it is located, an obtuse angle is formed between the outer end face and the outer side face, and the projection of the second assembly end face in the vertical direction is located on the first assembly end face.

[0013] In the heat exchanger of the air conditioner indoor unit as described above, the first heat exchange portion includes an outer side surface, and a distance between a projection of the second assembly end surface on the first assembly end surface and the outer side surface is 5-10 mm.

[0014] As described above, in the heat exchanger of the air conditioner indoor unit, the first heat exchange part has a first free end surface, the third heat exchange part has a second free end surface, the first free end surface is adapted to the shape of the second assembly end surface, and the second free end surface is adapted to the shape of the first assembly end surface.

[0015] In the heat exchanger of the air-conditioning indoor unit as described above, an avoidance notch is provided on the first plane contact surface of the first assembly end surface.

[0016] In the heat exchanger of the air conditioner indoor unit as described above, the first heat exchange portion and the second heat exchange portion include a line contact portion, and the line contact portion shields the avoidance gap.

[0017] In the heat exchanger of the air-conditioning indoor unit as described above, adjacent heat exchange parts are connected by a connecting part and the connecting part is cut by a cutter. The connecting part has a connecting side surface between adjacent heat exchange parts. After cutting the connecting part, a first connecting surface and a second connecting surface are formed. The first arc surface contact surface, the first plane contact surface and the first connecting surface on the first assembly end surface are connected in sequence, and the second arc surface contact surface, the second plane contact surface, the connecting side surface and the second connecting surface on the second assembly end surface are connected in sequence.

[0018] In the heat exchanger of the air-conditioning indoor unit as described above, the angle between the second heat exchange part and the vertical direction and the angle between the third heat exchange part and the vertical direction are both less than 40 degrees, and a seal is provided between the first arc contact surface of the second heat exchange part and the second connection surface of the third heat exchange part.

[0019] An air-conditioning indoor unit comprises the above-mentioned heat exchanger.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are:

[0021] The heat exchanger of the air-conditioning indoor unit of the present invention includes a first heat exchange part, a second heat exchange part and a third heat exchange part. The first heat exchange part includes a first assembly end surface assembled with the second heat exchange part, the second heat exchange part includes a second assembly end surface assembled with the first heat exchange part, the first assembly end surface includes a first arc surface contact surface and a first plane contact surface, the second assembly end surface includes a second arc surface contact surface and a second plane contact surface, the first arc surface contact surface of the first heat exchange part contacts the second arc surface contact surface of the second heat exchange part, and the first plane contact surface of the first heat exchange part contacts the second plane contact surface of the second heat exchange part; the second heat exchange part includes a first assembly end surface assembled with the third heat exchange part, and the third heat exchange part includes a second assembly end surface assembled with the second heat exchange part; the first assembly end surface includes a plane, the second assembly end surface includes a connecting side surface, the second plane contact surface of the third heat exchange part contacts the inner side surface of the second heat exchange part, and the connecting side surface of the third heat exchange part contacts the plane of the second heat exchange part. The utility model realizes contact between two adjacent heat exchange parts through two surfaces, which can achieve better self-sealing overlap, prevent air leakage at the overlap, improve air supply uniformity, and reduce the risks of condensation, dripping, condensation water storage, poor diversion, and low heat exchange efficiency.

[0022] The air conditioner indoor unit of the present invention adopts the above-mentioned heat exchanger. The two adjacent heat exchange parts of the heat exchanger are connected by two surfaces, which can achieve better self-sealing overlap, prevent air leakage at the overlap, improve the uniformity of air supply, and reduce the risks of condensation, dripping, condensation water storage, poor diversion, and low heat exchange efficiency.

[0023] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1It is a schematic diagram of a heat exchanger according to a specific embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the contact area between the first heat exchange part and the second heat exchange part of the heat exchanger in a specific embodiment of the present utility model.

[0027] Figure 3 It is a schematic diagram of the contact area between the second heat exchange part and the third heat exchange part of the heat exchanger in a specific embodiment of the present utility model.

[0028] Figure 4 It is a schematic diagram of the heat exchanger in a specific embodiment of the present invention before the three heat exchange parts are cut off.

[0029] Figure 5 This is a specific embodiment of the utility model Figure 4 Schematic diagram of the cut-off location.

[0030] Figure 6 This is a layout diagram of punching multiple heat exchangers on a mold in a specific embodiment of the present utility model.

[0031] Figure 7 It is a schematic diagram of a heat exchanger according to another specific embodiment of the present invention.

[0032] Figure 8 It is a schematic diagram of the contact area between the first heat exchange part and the second heat exchange part of a heat exchanger in another specific embodiment of the present invention.

[0033] Figure 9 It is a schematic diagram of the contact area between the second heat exchange part and the third heat exchange part of the heat exchanger in another specific embodiment of the present invention.

[0034] Figure 10 This is a schematic diagram of another specific embodiment of the heat exchanger of the present invention before the three heat exchange parts are cut off.

[0035] Figure 11 Another specific embodiment of the utility model Figure 9 Schematic diagram of the cut-off location.

[0036] Figure 12 This is another specific embodiment of the present invention, showing the layout of multiple heat exchangers punched on a mold.

[0037] In the figure,

[0038] 1. First heat exchange portion; 11. First free end surface;

[0039] 2. Second heat exchange portion; 23. Line contact portion;

[0040] 3. Third heat exchange portion; 31. Second free end surface;

[0041] 41. First arc contact surface; 42. First plane contact surface; 421. Avoidance gap; 43. Plane;

[0042] 51. Second arcuate contact surface; 52. Second planar contact surface; 53. Connecting side surface; 54. Outer end surface;

[0043] 6. Medial side;

[0044] 7. Lateral surface;

[0045] 8. Connecting portion; 81. First connecting surface; 82. Second connecting surface;

[0046] 9. Seals. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention in specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0051] In the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0052] The heat exchanger of the air-conditioning indoor unit includes a first heat exchange part, a second heat exchange part and a third heat exchange part. The first heat exchange part overlaps with the second heat exchange part and forms a surface contact. The second heat exchange part overlaps with the third heat exchange part and forms a surface contact. The two adjacent heat exchange parts are connected by two surface contacts, which can achieve better self-sealing overlap, prevent air leakage at the overlap, improve the uniformity of air supply, and reduce the risks of condensation, dripping, condensation water storage, poor diversion, and low heat exchange efficiency.

[0053] The following describes the implementation of the heat exchanger through two specific embodiments: Specific embodiments

[0054] like Figure 1-Figure 3 As shown, the heat exchanger includes a first heat exchange part 1 , a second heat exchange part 2 and a third heat exchange part 3 .

[0055] The first heat exchange part 1 is in contact with the second heat exchange part 2 , and the first heat exchange part 1 and the second heat exchange part 2 are arranged at a certain angle.

[0056] The second heat exchange part 2 is in contact with the third heat exchange part 3 , and the second heat exchange part 2 and the third heat exchange part 3 are arranged at a certain angle.

[0057] The first heat exchange part 1 includes a first assembly end surface ( Figure 1 The first assembly end surface includes a first arcuate contact surface 41 and a first plane contact surface 42.

[0058] The second heat exchange portion 2 includes a second assembly end surface ( Figure 1 The second assembly end surface includes a second arcuate contact surface 51 and a second plane contact surface 52.

[0059] When the first heat exchange part 1 and the second heat exchange part 2 are assembled, the first arcuate contact surface 41 of the first heat exchange part 1 contacts the second arcuate contact surface 51 of the second heat exchange part 2, and the first plane contact surface 42 of the first heat exchange part 1 contacts the second plane contact surface 52 of the second heat exchange part 2.

[0060] The second heat exchange portion 2 includes a first assembly end surface ( Figure 1 The first assembly end surface includes a plane 43.

[0061] The third heat exchange portion 3 includes a second assembly end surface ( Figure 1 The left end face of the third heat exchange part 3 in the middle), the second assembly end face includes a connecting side face 53.

[0062] When the second heat exchange part 2 and the third heat exchange part 3 are assembled, the second plane contact surface 52 of the third heat exchange part 3 contacts the inner side surface 6 of the second heat exchange part 2, and the connecting side surface 53 of the third heat exchange part 3 contacts the plane 43 of the second heat exchange part.

[0063] The first assembly end surfaces of all the heat exchange parts have the same shape, and the second assembly end surfaces of all the heat exchange parts have the same shape.

[0064] Therefore, the contact between two adjacent heat exchange parts is achieved through two surfaces, which can achieve better self-sealing overlap, prevent air leakage at the overlap, improve air supply uniformity, and reduce the risks of condensation, dripping, condensation water storage, poor diversion, and low heat exchange efficiency.

[0065] On the first assembly end face, the first planar contact surface 42 and the first arcuate contact surface 41 are continuously arranged, and the plane 43 and the inner side surface 6 are continuously arranged to form a self-enclosed contact surface to improve the sealing effect and the air leakage prevention effect.

[0066] On the second assembly end face, the second planar contact surface 52 and the second arcuate contact surface 51 are continuously arranged; the connecting side surface 53 and the second planar contact surface 52 are continuously arranged to form a self-enclosed contact surface to improve the sealing effect and the air leakage prevention effect.

[0067] An L-shaped contact surface is formed by overlapping the second heat exchange part 2 and the third heat exchange part 3.

[0068] The L-shaped contact surface has the following two functions:

[0069] One is to play a limiting role, which facilitates the overlap of the second heat exchange part 2 and the third heat exchange part 3;

[0070] Another is that the L-shaped contact surface has a better effect in preventing air leakage, thereby avoiding the problem of poor sealing performance of the overlap between the third heat exchange part 3 and the second heat exchange part 2 due to poor assembly consistency.

[0071] The second assembly surface has an outer end surface 54 connected to the outer side surface 7 of the heat exchange part where it is located. Taking the second heat exchange part 2 as an example, the second assembly end surface has an outer end surface 54 connected to the outer side surface 7 of the second heat exchange part 2. An obtuse angle is formed between the outer end surface 54 and the outer side surface 7. The projection of the second assembly end surface in the vertical direction is located on the first assembly end surface.

[0072] The first heat exchange portion 1 includes an outer side surface 7 , and a distance d between a projection of the second assembly end surface on the first assembly end surface and the outer side surface 7 is 5-10 mm.

[0073] The first heat exchange part 1 and the second heat exchange part 2 are arranged in such a manner that the condensed water formed on the second heat exchange part 2 can slide down to the first heat exchange part 1, thereby preventing the condensed water from dripping outside the water receiving tray.

[0074] The first heat exchange section 1 has a first free end surface 11 that matches the shape of the second assembly end surface. The third heat exchange section 3 has a second free end surface 31 that matches the shape of the first assembly end surface. This allows for a unified design for the center and end profile cuts, enabling the industry to use a single set of profile cutting sub-dies for fin molds, saving mold costs.

[0075] like Figure 4-Figure 6 As shown, adjacent heat exchange parts are connected by a connecting part 8 and the connecting part 8 is cut by a cutter to form three independent heat exchange parts. After the three independent heat exchange parts are overlapped and assembled, a heat exchanger as shown in 1 is obtained.

[0076] The connecting portion 8 has a connecting side surface 53 between adjacent heat exchange portions, and the bottom side surface of the connecting portion 8 is the connecting side surface 53. After the connecting portion 8 is cut, a first connecting surface 81 and a second connecting surface 82 are formed.

[0077] The cutting angle θ of the cutting connection portion 8 is any value between 80 and 85 degrees. This embodiment is suitable for automated cutting and requires high control accuracy.

[0078] like Figure 6 As shown in the figure, it can be seen that the end cut special-shaped cut and the middle cut special-shaped cut are consistent (vertical view). The mold can be punched with a set of special-shaped cutting sub-dies, which greatly reduces the mold cost.

[0079] On the first assembly end surface, the plane 43, the first arcuate contact surface 41, the first plane contact surface 42 and the first connecting surface 81 are connected in sequence, and on the second assembly end surface, the second arcuate contact surface 51, the second plane contact surface 52, the connecting side surface 53 and the second connecting surface 82 are connected in sequence.

[0080] The angle β1 between the second heat exchange part 2 and the vertical direction and the angle β2 between the third heat exchange part 3 and the vertical direction are both less than 40 degrees, so that the condensed water formed by the cooling of the heat exchanger will not drip from the middle of the heat exchanger to the air duct and fan due to excessive angles, thereby avoiding the formation of water blowing.

[0081] The overlap between the second heat exchange part 2 and the third heat exchange part 3 is close to the top of the heat exchanger, where the air supply volume is large. A seal 9 is provided between the first arc contact surface 41 of the second heat exchange part 2 and the second connection surface 82 of the third heat exchange part 3.

[0082] The sealing member 9 is generally a rubberized adhesive, forming a second barrier to prevent air leakage.

[0083] This embodiment also provides an air-conditioning indoor unit, which includes the above-mentioned heat exchanger.

[0084] The air conditioner indoor unit is generally a wall-mounted air conditioner indoor unit. Specific embodiments

[0085] In some cases where cutting control accuracy is low, for example, when using manual tooling or cutting devices with low cutting control accuracy, in order to increase the cutting margin and avoid producing defective products, such as Figure 7-12 As shown, an avoidance notch 421 is provided on the first planar contact surface 42 of the first assembly end surface.

[0086] Cutting knife angle see Figure 11 The angle α is any value between 60-70 degrees, and the lower knife size margin is increased to facilitate manual cutting.

[0087] The first heat exchange portion 1 and the second heat exchange portion 2 include a line contact portion 23 , and the line contact portion 23 shields the avoidance gap 421 .

[0088] The line contact portion 23 is formed by the top end of the first connection surface 81 of the first heat exchange portion 1 and the bottom end of the second connection surface 82 of the second heat exchange portion 2 , and the two contact to form the line contact portion 23 .

[0089] like Figure 8 As shown, it is a schematic diagram of the first heat exchange part 1 and the second heat exchange part 2 after overlapping. The overlapping contact position includes an arc surface formed by the contact of the first arc surface contact surface 41 and the second arc surface contact surface 51, a plane formed by the first plane contact surface 42 and the second plane contact surface 52, and a line contact formed by the line contact part 23, thereby increasing the self-sealing effect.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A heat exchanger for an air conditioner indoor unit, comprising a first heat exchange portion, a second heat exchange portion and a third heat exchange portion, characterized in that: The first heat exchange portion includes a first assembly end surface assembled with the second heat exchange portion, the second heat exchange portion includes a second assembly end surface assembled with the first heat exchange portion, the first assembly end surface includes a first arcuate contact surface and a first plane contact surface, the second assembly end surface includes a second arcuate contact surface and a second plane contact surface, and when the first heat exchange portion and the second heat exchange portion are assembled, the first arcuate contact surface of the first heat exchange portion contacts the second arcuate contact surface of the second heat exchange portion, and the first plane contact surface of the first heat exchange portion contacts the second plane contact surface of the second heat exchange portion; The second heat exchange part includes a first assembly end surface assembled with the third heat exchange part, and the third heat exchange part includes a second assembly end surface assembled with the second heat exchange part; the first assembly end surface includes a plane, and the second assembly end surface includes a second plane contact surface and a connecting side surface. When the second heat exchange part is assembled with the third heat exchange part, the second plane contact surface of the third heat exchange part contacts the inner side surface of the second heat exchange part, and the connecting side surface of the third heat exchange part contacts the plane of the second heat exchange part.

2. The heat exchanger for an air conditioner indoor unit according to claim 1, wherein: The first plane contact surface and the first arcuate contact surface are continuously arranged, and the second plane contact surface and the second arcuate contact surface are continuously arranged; the plane and the inner side surface are continuously arranged, and the connecting side surface and the second plane contact surface are continuously arranged.

3. The heat exchanger for an air conditioner indoor unit according to claim 1, wherein: The second assembly end surface has an outer end surface connected to the outer side surface of the heat exchange portion where it is located, an obtuse angle is formed between the outer end surface and the outer side surface, and a vertical projection of the second assembly end surface is located on the first assembly end surface.

4. The heat exchanger for an air conditioner indoor unit according to claim 3, characterized in that: The first heat exchange portion includes an outer side surface, and a distance between a projection of the second assembly end surface on the first assembly end surface and the outer side surface is 5-10 mm.

5. The heat exchanger for an air conditioner indoor unit according to claim 1, wherein: The first heat exchange portion has a first free end surface, and the third heat exchange portion has a second free end surface. The first free end surface is adapted to the shape of the second assembly end surface, and the second free end surface is adapted to the shape of the first assembly end surface.

6. The heat exchanger for an air conditioner indoor unit according to claim 1, wherein: An avoidance notch is provided on the first plane contact surface of the first assembly end face.

7. The heat exchanger for an air conditioner indoor unit according to claim 6, wherein: The first heat exchange portion and the second heat exchange portion include a line contact portion, and the line contact portion covers the avoidance gap.

8. The heat exchanger for an air conditioner indoor unit according to any one of claims 1 to 7, characterized in that: Adjacent heat exchange parts are connected by a connecting part and the connecting part is cut by a cutter. The connecting part has a connecting side surface between adjacent heat exchange parts. After cutting the connecting part, a first connecting surface and a second connecting surface are formed. The first arc surface contact surface, the first plane contact surface and the first connecting surface on the first assembly end surface are connected in sequence. The second arc surface contact surface, the second plane contact surface, the connecting side surface and the second connecting surface on the second assembly end surface are connected in sequence.

9. The heat exchanger for an air conditioner indoor unit according to claim 8, characterized in that: An angle between the second heat exchange part and the vertical direction and an angle between the third heat exchange part and the vertical direction are both less than 40 degrees, and a seal is provided between the first arcuate contact surface of the second heat exchange part and the second connection surface of the third heat exchange part.

10. An air conditioner indoor unit, characterized in that: The air conditioner indoor unit includes the heat exchanger according to any one of claims 1 to 9.

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