阅读说明：本技术 换热器 (Heat exchanger ) 是由 不公告发明人 于 2021-08-05 设计创作，主要内容包括：一种换热器,其包括第一集流管、第二集流管以及若干换热管。每一根换热管包括第一端部、第二端部、第一扁平部、第二扁平部、至少一个折弯部、第一扭转部以及第二扭转部。所述第一端部设于所述第一扭转部,所述第二端部设于所述第二扭转部。所述第一端部的宽度方向平行于所述第一集流管的第一轴向,所述第二端部的宽度方向平行于所述第二集流管的第二轴向。所述折弯部与所述第一集流管以及所述第二集流管均不接触,且所述折弯部相对于所述第一集流管以及所述第二集流管呈悬臂状。如此设置,所述换热管具有热胀冷缩空间,能较好地吸收热应力变形,降低了所述换热器开裂失效的风险。(A heat exchanger comprises a first collecting pipe, a second collecting pipe and a plurality of heat exchange pipes. Each heat exchange tube comprises a first end part, a second end part, a first flat part, a second flat part, at least one bending part, a first torsion part and a second torsion part. The first end portion is arranged on the first torsion portion, and the second end portion is arranged on the second torsion portion. The width direction of the first end portion is parallel to a first axial direction of the first collecting pipe, and the width direction of the second end portion is parallel to a second axial direction of the second collecting pipe. The bending portion is not in contact with the first collecting pipe and the second collecting pipe, and the bending portion is in a cantilever shape relative to the first collecting pipe and the second collecting pipe. So set up, the heat exchange tube has expend with heat and contract with cold space, can absorb thermal stress deformation betterly, has reduced the risk that the heat exchanger fracture became invalid.)

1. A heat exchanger (100), comprising:

a first header (1), said first header (1) having a first cavity (10) extending in a first axial direction (L1);

a second header (2), said second header (2) having a second cavity (20) extending in a second axial direction (L2);

a plurality of heat exchange tubes (3), each heat exchange tube (3) comprising a first end (381) and a second end (391), wherein the first end (381) is fixed to the first header (1) and in fluid communication with the first cavity (10), and the second end (391) is fixed to the second header (2) and in fluid communication with the second cavity (20);

the method is characterized in that: each heat exchange tube (3) further comprises a first flat part (31), a second flat part (32), at least one bending part (35) connected between the first flat part (31) and the second flat part (32), a first torsion part (38) connected with the first flat part (31) and a second torsion part (39) connected with the second flat part (32), wherein the first end part (381) is arranged at the first torsion part (38), the second end part (391) is arranged at the second torsion part (39), the width direction (W1-W1) of the first end part (381) is parallel to the first axial direction (L1), and the width direction (W2-W2) of the second end part (391) is parallel to the second axial direction (L2); the bending part (35) is not in contact with the first collecting pipe (1) and the second collecting pipe (2), and the bending part (35) is in a cantilever shape relative to the first collecting pipe (1) and the second collecting pipe (2).

2. The heat exchanger (100) of claim 1, wherein: the plurality of heat exchange tubes (3) are sequentially arranged along the first axial direction (L1) or the second axial direction (L2).

3. The heat exchanger (100) of claim 1, wherein: the first flat part (31) and the second flat part (32) are parallel to each other, and the bent part (35) is U-shaped.

4. The heat exchanger (100) of claim 1, wherein: the first collecting pipe (1) and the second collecting pipe (2) are located on the same side of the heat exchanger (100) and are parallel to each other.

5. The heat exchanger (100) of claim 4, wherein: the heat exchanger (100) comprises an inlet (12) in fluid communication with the first cavity (10) and an outlet (22) in fluid communication with the second cavity (20), the inlet (12) and the outlet (22) being located at opposite ends of the heat exchanger (100), respectively.

6. The heat exchanger (100) of claim 1, wherein: a width direction (W3-W3) of the first flat part (31) is perpendicular to a width direction (W1-W1) of the first end part (381); the width direction (W4-W4) of the second flat part (32) is perpendicular to the width direction (W2-W2) of the second end part (391).

7. The heat exchanger (100) of claim 1, wherein: each heat exchange tube (3) is of a serpentine structure, and each heat exchange tube (3) further comprises a third flat part (33) and a fourth flat part (34), wherein the first flat part (31), the third flat part (33), the fourth flat part (34) and the second flat part (32) are sequentially arranged along the first axial direction (L1) or the second axial direction (L2); the bending portion (35) includes a first bending portion (351) connecting the first flat portion (31) and the third flat portion (33), a second bending portion (352) connecting the third flat portion (33) and the fourth flat portion (34), and a third bending portion (353) connecting the fourth flat portion (34) and the second flat portion (32).

8. The heat exchanger (100) of claim 7, wherein: the first bent portion (351) and the third bent portion (353) are located on the same side of the heat exchanger (100), and the second bent portion (352) is located on the opposite side of the heat exchanger (100).

9. The heat exchanger (100) of claim 7, wherein: the heat exchanger (100) comprises a first fin (41) between the first flattened portion (31) and the third flattened portion (33), a second fin (42) between the third flattened portion (33) and the fourth flattened portion (34), and a third fin (43) between the fourth flattened portion (34) and the second flattened portion (32).

10. The heat exchanger (100) of claim 1, wherein: the first collecting pipe (1) and the second collecting pipe (2) are arranged along the width direction (W3-W3) of the first flat part (31) and the length direction (L3-L3) of the first flat part (31) in a staggered mode.

Technical Field

The invention relates to a heat exchanger, and belongs to the technical field of air conditioning system parts.

Background

Referring to fig. 1 and 2, a conventional heat exchanger 100 'generally includes a first collecting pipe 1', a second collecting pipe 2 ', and a plurality of heat exchange tubes 3' connected between the first collecting pipe 1 'and the second collecting pipe 2'. The heat exchange tube 3 ' includes a main body portion 30 ', a first end 31 ' at one side of the main body portion 30 ', and a second end 32 ' at the other side of the main body portion 30 ', wherein the main body portion 30 ', the first end 31 ' and the second end 32 ' are substantially located in the same plane. As is well known, since the heat exchange tube 3 'itself has a certain width, in order to be able to insert the first end 31' and the second end 32 ', the diameters of the first header 1' and the second header 2 'are required to be designed to be relatively large, which greatly increases the cost of the heat exchanger 100'.

In addition, when the heat exchange capacity of the heat exchange tube 3 ' needs to be increased, one way is to add more layers of heat exchange tubes 3 ', and both ends of each layer of heat exchange tubes 3 ' need to be welded with the collecting pipes on both sides, which greatly increases the number of welding points. As the number of welding points increases, the defective rate of welding also increases greatly, which is not favorable for manufacturing and improving the product quality.

In addition, referring to fig. 1 and fig. 2, two ends of each layer of heat exchange tubes 3 ' are respectively fixed to the first collecting pipe 1 ' and the second collecting pipe 2 '. The heat exchanger 100' of this construction is susceptible to cracking due to thermal stress. Specifically, when the ambient temperature is low in winter, the temperature of the heat exchanger 100 'itself is also low, at this time, if the compressor is started, the temperature of the refrigerant at the outlet of the compressor is high, when the refrigerant enters the heat exchanger 100', the refrigerant with the high temperature firstly passes through the heat exchange tube close to the inlet collecting pipe, and the heat exchange tube at the part far away from the inlet collecting pipe is low in temperature and cannot expand in time due to thermal expansion, so that stress can be generated. Over time, the heat exchange tubes near the inlet header are prone to cracking.

Disclosure of Invention

The invention aims to provide a heat exchanger which is low in cost and high in reliability.

In order to achieve the purpose, the invention adopts the following technical scheme: a heat exchanger, comprising:

a first header having a first cavity extending in a first axial direction;

a second header having a second cavity extending in a second axial direction;

each heat exchange tube comprises a first end and a second end, wherein the first end is fixed to the first collecting pipe and is in fluid communication with the first cavity, and the second end is fixed to the second collecting pipe and is in fluid communication with the second cavity;

each heat exchange tube further comprises a first flat part, a second flat part, at least one bending part connected between the first flat part and the second flat part, a first torsion part connected with the first flat part and a second torsion part connected with the second flat part, wherein the first end part is arranged at the first torsion part, the second end part is arranged at the second torsion part, the width direction of the first end part is parallel to the first axial direction, and the width direction of the second end part is parallel to the second axial direction; the bending portion is not in contact with the first collecting pipe and the second collecting pipe, and the bending portion is in a cantilever shape relative to the first collecting pipe and the second collecting pipe.

As a further improved technical scheme of the invention, the plurality of heat exchange tubes are sequentially arranged along the first axial direction or the second axial direction.

As a further improved technical solution of the present invention, the first flat portion and the second flat portion are parallel to each other, and the bent portion is U-shaped.

As a further improved technical solution of the present invention, the first collecting pipe and the second collecting pipe are located on the same side of the heat exchanger and are parallel to each other.

As a further improved technical solution of the present invention, the heat exchanger includes an inlet in fluid communication with the first cavity and an outlet in fluid communication with the second cavity, and the inlet and the outlet are respectively located at two opposite ends of the heat exchanger.

As a further improved technical solution of the present invention, a width direction of the first flat portion is perpendicular to a width direction of the first end portion; the width direction of the second flat portion is perpendicular to the width direction of the second end portion.

As a further improved technical scheme of the present invention, each heat exchange tube has a serpentine structure, and further includes a third flat portion and a fourth flat portion, wherein the first flat portion, the third flat portion, the fourth flat portion and the second flat portion are sequentially arranged along the first axial direction or the second axial direction; the bending part comprises a first bending part connected with the first flat part and the third flat part, a second bending part connected with the third flat part and the fourth flat part, and a third bending part connected with the fourth flat part and the second flat part.

As a further improved technical solution of the present invention, the first bending portion and the third bending portion are located on the same side of the heat exchanger, and the second bending portion is located on the opposite side of the heat exchanger.

As a further improved aspect of the present invention, the heat exchanger includes a first fin located between the first flat portion and the third flat portion, a second fin located between the third flat portion and the fourth flat portion, and a third fin located between the fourth flat portion and the second flat portion.

As a further improved technical solution of the present invention, the first collecting pipe and the second collecting pipe are arranged in a staggered manner along both the width direction of the first flat portion and the length direction of the first flat portion.

Compared with the prior art, the heat exchange tube has the advantages that the first torsion part and the second torsion part are arranged, so that the width direction of the first end part is parallel to the first axial direction, and the width direction of the second end part is parallel to the second axial direction, the heat exchange tube can be installed by mainly utilizing the axial sizes of the first collecting pipe and the second collecting pipe, the collecting pipes with smaller diameters are favorably adopted, and the cost is saved; in addition, each heat exchange tube still includes at least one portion of bending, just the portion of bending for first pressure manifold and the second pressure manifold is the cantilever form, so sets up, the heat exchange tube has expend with heat and contract with cold space, can absorb thermal stress deformation betterly, has reduced the risk that the heat exchanger fracture became invalid.

Drawings

Fig. 1 is a plan view of a heat exchanger in the related art.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a schematic perspective view of a heat exchanger of the present invention in one embodiment.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a partially enlarged view of a picture frame portion a of fig. 4.

Fig. 6 is a front view of fig. 3.

Fig. 7 is a partially enlarged view of circled portion B in fig. 6.

Fig. 8 is a partially exploded perspective view of fig. 3.

Fig. 9 is a partial exploded perspective view of fig. 8 at another angle.

Fig. 10 is a top view of one of the heat exchange tubes of fig. 8.

Fig. 11 is a front view of one of the heat exchange tubes of fig. 8.

Fig. 12 is a left side view of one of the heat exchange tubes of fig. 8.

Detailed Description

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. If several embodiments exist, the features of these embodiments may be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The statements made in the following exemplary detailed description do not represent all implementations consistent with the present disclosure; rather, they are merely examples of apparatus, products, and/or methods consistent with certain aspects of the invention, as set forth in the claims below.

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention. As used in the specification and claims of this invention, the singular form of "a", "an", or "the" is intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the use of terms such as "first," "second," and the like, in the description and in the claims of the present invention do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the terms "front," "back," "up," "down," and the like in the description of the invention are used for convenience of description and are not limited to a particular position or spatial orientation. The word "comprise" or "comprises", and the like, is an open-ended expression meaning that an element that precedes "includes" or "comprising" includes "that the element that follows" includes "or" comprises "and its equivalents, that do not preclude the element that precedes" includes "or" comprising "from also including other elements. If the invention is referred to as "a plurality", it means two or more.

Referring to fig. 3 to 12, the present invention discloses a heat exchanger 100, which can be used in a refrigeration system as an evaporator or a condenser.

The heat exchanger 100 includes a first collecting pipe 1, a second collecting pipe 2, a plurality of heat exchange tubes 3, and a plurality of fins 4.

The first header 1 has a first cavity 10 extending along a first axial direction L1 and a plurality of first slots 11 spaced along the first axial direction L1 (see fig. 9). The second header 2 has a second cavity 20 extending along a second axial direction L2 and a plurality of second slots 21 (see fig. 8) spaced along the second axial direction L2. In the illustrated embodiment of the present invention, the first header 1 and the second header 2 are located on the same side of the heat exchanger 100 and are parallel to each other. The first and second axial directions L1 and L2 are parallel to each other. Of course, in other embodiments, the first header 1 and the second header 2 may be located on different sides of the heat exchanger 100; and/or the first collecting pipe 1 and the second collecting pipe 2 are not parallel to each other.

The heat exchanger 100 includes an inlet 12 in fluid communication with the first chamber 10 and an outlet 22 in fluid communication with the second chamber 20, the inlet 12 and the outlet 22 being located at opposite ends (e.g., upper and lower ends) of the heat exchanger 100, respectively. Of course, in other embodiments, the inlet 12 and the outlet 22 may be located at the same end of the heat exchanger 100.

The plurality of heat exchange tubes 3 are arranged in sequence along the first axial direction L1 or the second axial direction L2. Each heat exchange tube 3 forms one flow path of the heat exchanger 100. Preferably, the heat exchange tube 3 is a microchannel flat tube. The following description will be made in detail by taking only one heat exchange tube 3 as an example.

Each heat exchange tube 3 comprises a first end 381 and a second end 391, wherein the first end 381 is fixed to the first header 1 and is in fluid communication with the first cavity 10, and the second end 391 is fixed to the second header 2 and is in fluid communication with the second cavity 20. In an embodiment of the present invention, the first end 381 is inserted into the first slot 11 and is fixed to the first header 1 by brazing; the second end 391 is inserted into the second slot 21 and is fixed to the second header 2 by brazing.

Each heat exchange tube 3 further comprises a first flat portion 31, a second flat portion 32, at least one bent portion 35 connected between the first flat portion 31 and the second flat portion 32, a first twisted portion 38 connected to the first flat portion 31, and a second twisted portion 39 connected to the second flat portion 32. The first end 381 is disposed on the first torsion portion 38, and the second end 391 is disposed on the second torsion portion 39. In the illustrated embodiment of the present invention, the first torsion portion 38 and the second torsion portion 39 are both twisted by 90 °. The width directions W1-W1 of the first end portion 381 are parallel to the first axial direction L1, and the width directions W2-W2 of the second end portion 391 are parallel to the second axial direction L2; the bending portion 35 is not in contact with the first collecting pipe 1 and the second collecting pipe 2, and the bending portion 35 is in a cantilever shape relative to the first collecting pipe 1 and the second collecting pipe 2.

Specifically, the first flat portion 31 and the second flat portion 32 are parallel to each other, and the bent portion 35 is U-shaped. The width directions W3-W3 of the first flat portion 31 are perpendicular to the width directions W1-W1 of the first end portion 381; the width directions W4-W4 of the second flat part 32 are perpendicular to the width directions W2-W2 of the second end 391.

In the illustrated embodiment of the present invention, each heat exchange tube 3 has a serpentine structure, and each heat exchange tube 3 further includes a third flat part 33 and a fourth flat part 34, wherein the first flat part 31, the third flat part 33, the fourth flat part 34 and the second flat part 32 are sequentially arranged along the first axial direction L1 or the second axial direction L2. The bent portion 35 includes a first bent portion 351 connecting the first flat portion 31 and the third flat portion 33, a second bent portion 352 connecting the third flat portion 33 and the fourth flat portion 34, and a third bent portion 353 connecting the fourth flat portion 34 and the second flat portion 32. The first bending portion 351 and the third bending portion 353 are located on the same side of the heat exchanger 100, and the second bending portion 352 is located on the opposite side of the heat exchanger 100. In this configuration, the first flat portion 31, the third flat portion 33, the fourth flat portion 34, and the second flat portion 32 are connected by the first bent portion 351, the second bent portion 352, and the third bent portion 353 to allow a refrigerant to flow therethrough. Those skilled in the art will understand that the number of the flat portions and the bending portions 35 can be flexibly adjusted according to the requirement, and the present invention is not limited thereto.

The fins 4 include a first fin 41 between the first flat portion 31 and the third flat portion 33, a second fin 42 between the third flat portion 33 and the fourth flat portion 34, and a third fin 43 between the fourth flat portion 34 and the second flat portion 32. The fins 4 are fixedly connected with the heat exchange tubes 3 through brazing, so that the heat exchange effect is improved.

In the illustrated embodiment of the present invention, the first header 1 and the second header 2 are disposed in a staggered manner along both the width direction W3-W3 of the first flat part 31 and the length direction L3-L3 of the first flat part 31, so that the first header 1 and the second header 2 are disposed advantageously, and interference between the first header 1 and the second header 2 is prevented. Accordingly, the bending angles of the first torsion portion 38 and the second torsion portion 39 are different, for example, the first torsion portion 38 bends upward while twisting, so that the first end portion 381 extends obliquely upward; the second twisted portion 39 is twisted and horizontally bent to horizontally extend the second end 391; this design is advantageous for opening the distance between the first end 381 and the second end 391, so as to reduce the risk of interference when assembling the first end 381 and the second end 391 to the first header 1 and the second header 2.

Compared with the prior art, the heat exchange tube 3 can be installed by mainly utilizing the axial dimensions of the first collecting pipe 1 and the second collecting pipe 2 by arranging the first torsion part 38 and the second torsion part 39 so that the width directions W1-W1 of the first end part 381 are parallel to the first axial direction L1 and the width directions W2-W2 of the second end part 391 are parallel to the second axial direction L2, so that the collecting pipes with smaller diameters can be adopted, and the cost is saved. Especially for large heat exchangers, the design of the invention can greatly reduce the material cost. In addition, the heat exchange tube 3 of each flow is of a serpentine structure, and is matched with the first collecting pipe 1 and the second collecting pipe 2 to form a cantilever structure. Each heat exchange tube 3 still includes at least one portion 35 of bending, just the portion 35 of bending for first pressure manifold 1 and second pressure manifold 2 is the cantilever form, so sets up, heat exchange tube 3 has expend with heat and contract with cold space, can absorb thermal stress deformation better, has reduced the risk of heat exchanger 100 fracture inefficacy. Each heat exchange tube 3 is an independent flow, a refrigerant flows in from the inlet 12, and then is uniformly distributed to the heat exchange tubes 3 of each flow through the first cavity 10, so that the uniformity of refrigerant distribution is improved. Compared with other types of parallel flow heat exchangers, the heat exchange tube 3 adopts a bending scheme, so that the number of welding spots between the heat exchange tube 3 and a collecting pipe is greatly reduced, the welding leakage rate is greatly reduced, and the reliability of the heat exchanger 100 is improved.

The above embodiments are only for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present invention should be based on the technical personnel in the technical field, and although the present invention has been described in detail by referring to the above embodiments, the technical personnel in the technical field should understand that the technical personnel in the technical field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.