CN111721149A

CN111721149A - Heat exchanger

Info

Publication number: CN111721149A
Application number: CN201910211458.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Sanhua Holding Group Co Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-09-29

Abstract

The application relates to the heat exchange field, especially relates to a heat exchanger, includes: a housing including a first end and a second end, the housing having an interior cavity extending through the first end and the second end; a first current collector connected to the first end and a second current collector connected to the second end; the heat exchange pieces are arranged at intervals and in parallel, at least part of the heat exchange pieces are positioned in the inner cavity of the shell, the inner cavity of the shell is divided into a plurality of first channels by the heat exchange pieces, and the first current collecting piece is communicated with the second current collecting piece through the heat exchange pieces; the heat exchange piece comprises a first heat exchange tube, a second heat exchange tube and a connecting part connected between the first heat exchange tube and the second heat exchange tube. The problem of between the layer of heat transfer spare between the layer intercommunication, join when the fluid of different laminar flows through the clearance, cause the fluid to flow in series flow is solved.

Description

Heat exchanger

Technical Field

The application relates to the field of heat exchange, in particular to a heat exchanger.

Background

The related heat exchanger is characterized in that a plurality of layers of heat exchange pieces are arranged in parallel at intervals in the inner cavity of the related heat exchanger, so that the inner cavity of the related heat exchanger is divided into a plurality of channels, and each layer of heat exchange piece consists of at least two rows of heat exchange tubes arranged in parallel at intervals in order to increase the flow path of refrigerant. However, after fluid is introduced into the inner cavity of the heat exchanger, because gaps exist among the heat exchange tubes of each layer of heat exchange member, the channels between the layers are communicated, and the fluid flowing in each channel is converged when flowing through the gaps, so that the series flow of the fluid is caused, and the heat exchange effect is influenced.

Disclosure of Invention

In view of the above-identified problems with the prior art, the present application provides an improved heat exchanger.

In order to achieve the purpose, the following technical scheme is adopted in the application:

a heat exchanger, comprising: a housing including first and second oppositely disposed ends, the housing having an interior cavity extending through the first and second ends; a first current collector connected to the first end and a second current collector connected to the second end; the heat exchange pieces are arranged at intervals and in parallel, at least part of the heat exchange pieces are positioned in the inner cavity of the shell, the inner cavity of the shell is divided into a plurality of first channels by the heat exchange pieces, and the first current collecting piece is communicated with the second current collecting piece through the heat exchange pieces; the heat exchange piece comprises a first heat exchange tube, a second heat exchange tube and a connecting part connected between the first heat exchange tube and the second heat exchange tube.

Optionally, the first heat exchange tube, the second heat exchange tube and the connecting portion are integrally formed.

Optionally, the first heat exchange tube and the second heat exchange tube each include two joint sections and a main body section located between the two joint sections, the connection portion is aligned with the main body section, and the two joint sections are respectively led into the first collecting piece and the second collecting piece.

Optionally, the first heat exchange tube and the second heat exchange tube each include two joint sections and a main body section located between the two joint sections, the two joint sections are respectively introduced into the first current collecting piece and the second current collecting piece, and two ends of the connecting portion are respectively introduced into the first current collecting piece and the second current collecting piece.

Optionally, the width of the joint segment is smaller than that of the main body segment, a step portion is formed between the main body segment and the joint segment, and the step portion abuts against the first current collecting piece and the second current collecting piece.

Optionally, the heat exchanging element includes a first sidewall and a second sidewall on opposite sides, and both the first sidewall and the second sidewall are connected to the inner wall of the casing.

Optionally, at least one of the first side wall and the second side wall has an arc-shaped or square-shaped cross section.

Optionally, the first collecting piece includes a first collecting chamber and a second collecting chamber that are independent of each other, the second collecting piece includes a third collecting chamber and a fourth collecting chamber, the first collecting chamber and the third collecting chamber are communicated through the tube cavity of the heat exchange tube, and the second collecting chamber and the fourth collecting chamber are communicated through the tube cavity of the heat exchange tube.

Optionally, the heat exchanger includes an input connector and an output connector for connecting to an external pipeline, the input connector and the output connector are both connected to the first manifold, the input connector and the output connector are arranged along a direction perpendicular to the arrangement direction of the heat exchange member, the input connector and the output connector are respectively provided with a second channel and a third channel, the second channel is communicated with the first manifold, and the third channel is communicated with the second manifold.

Optionally, the second channel is opposite to the lumen of at least one of the first heat exchange tubes, and the third channel is opposite to the lumen of at least one of the second heat exchange tubes.

According to the technical scheme, the heat exchange piece of the heat exchanger adopts at least two rows of heat exchange tubes, and the heat exchange tubes are connected through the connecting parts, so that a plurality of first channels are formed between layers of the heat exchange piece in a separated mode, streaming of fluid is reduced, and heat exchange efficiency is improved.

Drawings

FIG. 1 is a schematic perspective view of the structure of an embodiment of the present application;

FIG. 2 is a perspective view of a heat exchange core structure of an embodiment of the present application;

fig. 3 is a structural perspective view of an embodiment of the present application with the heat sink removed;

FIG. 4 is an enlarged view of the structure of the dashed area of FIG. 3;

FIG. 5 is a side view of a heat exchanger of an embodiment of the present application;

FIG. 6 is a perspective view of a front water plate and heat exchange tube assembly of an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a front water plate according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a heat exchange tube according to an embodiment of the present application;

FIG. 9 is an enlarged view of the structure of the dashed area of FIG. 8;

FIG. 10 is a schematic view of another embodiment of the heat exchange tube of the present application;

fig. 11 is a structural enlarged view of a dotted line region of fig. 10.

In the figure: the heat exchanger comprises a shell 1, a first end 11, a second end 12, a first channel 13, a front water plate 14, a rear water plate 15, a first concave portion 141, a heat sink 2, a first collecting piece 3, a pipe 31, a first pipe portion 311, a second pipe portion 312, a mounting plate 32, a second collecting piece 4, a heat exchange piece 5, a first heat exchange pipe 51, a second heat exchange pipe 52, a connecting portion 53, a first side wall 54, a second side wall 55, a joint section 511, a main body section 512, a step portion 513, an input connecting piece 6, an output connecting piece 7, an output pipe 8, an input pipe 9 and a cover 10.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, 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; "plurality" means two or more than two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

The heat exchanger according to the exemplary embodiment of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

As shown in fig. 1 to 6, a heat exchanger of the present embodiment includes: the radiator comprises a shell 1, a plurality of radiating pieces 2, a plurality of heat exchange pieces 5, a first current collecting piece 3 and a second current collecting piece 4, wherein the first current collecting piece and the second current collecting piece are respectively arranged at two ends of the shell 1.

In this embodiment, casing 1 is the cuboid shape, and casing 1 includes that the cross-section is preceding water board 14 and the back water board 15 of L shape, and preceding water board 14 and the 15 concatenation of back water board constitute casing 1, and during the concatenation, the both sides wall of preceding water board 14 and the 15 concatenation of back water board department both sides has the part of coincidence to guarantee welding area, increase casing 1's intensity.

Alternatively, the housing 1 may be integrally formed.

In the present embodiment, the housing 1 has a first end 11 and a second end 12 disposed opposite to each other, the housing 1 has no side wall at the first end 11 and the second end 12, the housing 1 has an inner cavity through which the first end 11 and the second end 12 penetrate, and the first collecting member 3 and the second collecting member 4 are respectively mounted at the first end 11 and the second end 12 of the housing 1.

In the present embodiment, the front water plate 14 and the rear water plate 15 are respectively provided with an output pipe 8 and an input pipe 9, and the input pipe 8 and the output pipe 9 are arranged diagonally. Furthermore, a first concave portion 141 formed by sinking towards the outside of the heat exchanger is arranged on the front water plate 14, the first concave portion 141 is used for outputting the heat exchange medium in the shell 1 after converging, an output port is arranged on the first concave portion 141, and the output pipe 8 is inserted into the output port and welded. The rear water plate 15 is also provided with a second concave portion (not shown) formed by being concave towards the outer side of the heat exchanger, and an input port for inserting the input pipe 9, and the second heat exchange medium flows into the shell through the input pipe 8 and is divided by the second concave portion. The flow direction of the second heat exchange medium is shown by the arrows in fig. 2. The second heat exchange medium may be liquid water or a mixture of ethylene glycol and water.

Further, a heat exchange core body composed of a plurality of heat exchange pieces 5 and a plurality of heat dissipation pieces 2 is installed in the inner cavity of the shell 1, the plurality of heat exchange pieces 5 are arranged in parallel at intervals, and the heat exchange pieces 5 and the heat dissipation pieces 2 are alternately stacked in the inner cavity of the shell 1 one by one. The heat exchange piece 5 is internally provided with a plurality of first medium channels which are arranged in parallel, two ends of the heat exchange piece 5 are respectively communicated with the first current collecting piece 3 and the second current collecting piece 4, and a first heat exchange medium flows between a current collecting cavity of the first current collecting piece 3 and a current collecting cavity of the second current collecting piece 4 through the first medium channels of the heat exchange piece 5. The heat exchange core body formed by the heat exchange piece 5 and the heat dissipation piece 2 is used for exchanging heat with a second heat exchange medium introduced into the inner cavity of the shell 1.

Specifically, the heat exchanging element 5 includes a first heat exchanging tube 51 and a second heat exchanging tube 52 which are arranged side by side, two ends of the first heat exchanging tube 51 and the second heat exchanging tube 52 are respectively connected with the first collecting element 3 and the second collecting element 4, the first heat exchanging tube 51 and the second heat exchanging tube 52 may be aluminum tubes or aluminum alloy tubes, a plurality of first medium channels are arranged in the first heat exchanging tube 51 and the second heat exchanging tube 52 in parallel along the length direction thereof, and the first heat exchanging tube 51 and the second heat exchanging tube 52 communicate the inner cavity of the first collecting element 3 with the inner cavity of the second collecting element 4 through the first medium channels.

In the present embodiment, the heat sink 2 is a fin, such as a zigzag heat exchange fin, a straight fin, a corrugated heat exchange fin, a porous fin, or the like. The heat sink 2 may be welded to the first and second

heat exchange tubes

51 and 52 by brazing, or may be welded to the first and second headers 3 and 4 by welding the ends thereof.

Optionally, the first heat exchange tube 51 and the second heat exchange tube 52 are flat, and are aluminum and aluminum alloy porous microchannel flat tube profiles (hereinafter referred to as flat tubes) with cross sections not greater than 3.5mm in height and planar wall thicknesses not greater than 0.45mm, and the cross sections of microchannels in the flat tubes may be square, circular, trapezoidal or other shapes.

Further, the heat exchange member 5 of the present embodiment further includes a connecting portion 53 between the first heat exchange tube 51 and the second heat exchange tube 52, the connecting portion 53 is disposed along the length direction of the first heat exchange tube 51 and the second heat exchange tube 52, the first heat exchange tube 51 and the second heat exchange tube 52 are connected by the connecting portion 53, the first heat exchange tube 51, the second heat exchange tube 52 and the connecting portion 53 are integrally formed, the assembly of the heat exchanger is facilitated, the plurality of heat exchange members 5 partition the inner cavity of the casing 1 to form a plurality of first channels 13, and the second heat exchange medium flows into the casing through the input tube 8 and is divided by the plurality of first channels 13 at the second concave portion. The second heat exchange medium flows in the first channels 13 of each layer, so that series flow is reduced, and the heat exchange efficiency is improved.

The heat exchanging element 5 of the present embodiment is processed by an extrusion die. The extrusion die is changed from a single-row micro-channel flat tube extrusion die into two rows of novel flat tube extrusion dies with ribs in the middle, and the processing and forming of the heat exchange part 5 can be realized.

In other embodiments, the extrusion die of the heat exchange member 5 may be adjusted to enable the heat exchange member 5 to include three or more than three flat micro-channel tubes, and the flat micro-channel tubes may be arranged side by side along the flow direction of the second heat exchange medium, or may be arranged in a wavy or V-shaped manner along the flow direction of the second heat exchange medium.

As shown in fig. 1, 6, 7, 8 and 9, the first and second

heat exchange tubes

51 and 52 of the present embodiment have the same structure, and both the first and second

heat exchange tubes

51 and 52 are inserted into the first and second collecting members 3 and 4.

Specifically, the first heat exchange pipe 51 includes two joint sections 511 and a main body section 512 located between the two joint sections 511. The two connection segments 511 open into the collector chambers of the first collector part 3 and the second collector part 4, respectively. The joint of the two joint segments 511 with the first collecting piece 3 and the second collecting piece 4 is fixed and sealed by brazing.

In the present embodiment, the width of the joint segment 511 is smaller than that of the main body segment 512, and a step 513 for abutting against the first collecting member 3 and the second collecting member 4 is formed at the transition of the joint segment 511 and the main body segment 512. The step part 513 is used for positioning when the two ends of the first heat exchange tube 51 and the second heat exchange tube 52 are respectively inserted into the first collecting piece 3 and the second collecting piece 4, so that the assembly is convenient.

Alternatively, both ends of the connection portion 53 may not abut against the first and second current collectors 3 and 4. That is, the two ends of the connecting portion 53 are not aligned with the two ends of the main body section 512, and the two ends of the connecting portion 53 leave small gaps with the first current collecting member 3 and the second current collecting member 4, so that the influence of series flow is reduced.

Optionally, two ends of the connecting portion 53 and the main body segment 512 may be aligned in the width direction of the heat exchanging element 5, two ends of the connecting portion 53 are respectively abutted to the first current collecting element 3 and the second current collecting element 4, and the abutted portions are fixed and sealed by brazing, so that the first channels 13 are independent from each other.

Optionally, two ends of the connecting portion 53 are not aligned with two ends of the main body segment 512, the length of the connecting portion 53 is greater than that of the main body segment 512, and two ends of the connecting portion 53 respectively open into the first collecting member 3 and the second collecting member 4. The joint portion 53 is fixed and sealed by brazing to the first and second current collecting members 3 and 4.

Further, the heat exchanging element 5 includes a first side wall 54 and a second side wall 55 at two opposite sides, and the first side wall 54 and the second side wall 55 abut against the inner wall of the housing 1. Namely, the side walls of the main body sections 512 of the first heat exchange tube 51 and the second heat exchange tube 52 close to the outermost sides of the heat exchangers are tightly attached to the inner wall of the shell 1 and fixed by brazing. The first side wall 54 and the second side wall 55 are arc-shaped in cross section, so that the welding area between the first side wall 54 and the inner walls of the front water plate 14, the second side wall 55 and the rear water plate 15 of the shell 1 can be increased.

Alternatively, as shown in fig. 10 and 11, the first side wall 54 and the second side wall 55 may have a square cross section.

Alternatively, the first side wall 54 has an arc-shaped cross section, and the second side wall 55 has a square cross section.

In this embodiment, the first collecting member 3 is formed by fastening an M-shaped pipe 31 and a square mounting plate 32, the mounting plate 32 and the pipe 31 are assembled to form a collecting chamber, the upper and lower ends of the pipe 31 are both provided with a sealing cap 10 for sealing, and the sealing cap 10 is inserted into the pipe 31 and then soldered and fixed to the joint of the pipe 31 to seal the pipe. The second current collecting piece 4 is composed of a corresponding mounting plate and an M-shaped pipe fitting, and mounting holes are formed in the mounting plates of the first current collecting piece 3 and the second current collecting piece 4. Both ends of the first heat exchange tube 51 and the second heat exchange tube 52 are respectively inserted into the mounting hole of the first collecting piece 3 and the mounting hole (not shown) of the second collecting piece 4.

Further, the first collecting piece 3 comprises a first collecting cavity and a second collecting cavity which are independent of each other, the second collecting piece 4 comprises a third collecting cavity and a fourth collecting cavity which are communicated with each other, and the first heat exchange tube 51 and the second heat exchange tube 52 are communicated with the first collecting cavity and the third collecting cavity, the second collecting cavity and the fourth collecting cavity respectively through a first medium channel.

Specifically, the pipe member 31 includes a first pipe portion 311 and a second pipe portion 312 which are C-shaped. Wherein the first pipe portion 311 and the second pipe portion 312 are adjacently disposed. Of course, in other embodiments, the first tube portion 311 and the second tube portion 312 may not be disposed adjacent to each other.

The first pipe portion 311 and the second pipe portion 312 are open on the side adjacent to the mounting plate 32. First tube portion 311 is connected to mounting plate 32 with the first or third manifold formed therebetween. The second pipe portion 312 is connected to the mounting plate 32 and forms the second or fourth manifold therebetween.

Further, the first current collector 3 includes a splicing portion 313, the splicing portion 313 is formed by splicing two adjacent side walls of the first pipe portion 311 and the second pipe portion 312, an end surface of the splicing portion 313 abuts against the mounting plate 32, and the abutting position is welded, fixed and sealed.

Of course, in other embodiments, when the pipe 31 is formed by profile machining, the first pipe portion 311, the second pipe portion 312 and the splicing portion 313 may be an integral structure.

In other embodiments, the first and second

tubular portions

311, 312 are a unitary structure, and the joint 313 is a separate component from the first and second

tubular portions

311, 312, and may be welded or otherwise coupled to the first and second

tubular portions

311, 312. This is not limited in this application.

The second collecting piece 4 has substantially the same structure as the first collecting piece 3, except that a channel for communicating the third and fourth manifolds is provided on the joint of the second collecting piece 4.

Further, the heat exchanger further comprises an input connecting piece 6 and an output connecting piece 7 which are used for connecting external pipelines, the input connecting piece 6 and the output connecting piece 7 are both connected with the first collecting piece 3, the input connecting piece 6 and the output connecting piece 7 are arranged along the arrangement direction perpendicular to the heat exchange piece 5, the input connecting piece 6 and the output connecting piece 7 are respectively provided with a second channel 61 and a third channel 71, the second channel 61 is communicated with the first collecting cavity, and the third channel 71 is communicated with the second collecting cavity.

Further, the second channel 61 is opposite to the first medium channels of the three first heat exchange tubes 51, and the third channel 71 is opposite to the first medium channels of the three second heat exchange tubes 52.

In this embodiment, the first heat exchange medium input through the input connector 6 firstly enters the first collecting chamber, then is distributed to each layer of first medium channels communicated with the first collecting chamber, flows into the third collecting chamber through the first medium channels, and because the third collecting chamber is communicated with the fourth collecting chamber, the first heat exchange medium flows into the fourth collecting chamber, then is distributed to each layer of first medium channels communicated with the fourth collecting chamber, and finally flows into the second collecting chamber, and flows out of the heat exchanger from the fluid outlet of the output connector 7.

In the flowing process of the first heat exchange medium, because the input connecting piece 6 and the output connecting piece 7 are arranged side by side, the inlet of the input connecting piece 6 is opposite to the first medium channel of the at least one first heat exchange tube 51, and the outlet of the output connecting piece 7 is opposite to the at least one second heat exchange tube 52, the height difference of the position where the first medium enters the heat exchanger is small compared with the position where the first medium exits the heat exchanger. In this embodiment the flow resistance of the first heat exchange medium in the layers of heat exchange elements 5 is small compared to the diagonal arrangement of the inlet connection 6 and said outlet connection 7. Namely, the first heat exchange media of each layer flow in the same layer of space as much as possible, and are uniformly distributed, so that the heat exchange efficiency is improved.

Optionally, the first collecting member 3 and the second collecting member 4 may have other structures, for example, the first collecting member 3 and the second collecting member 4 are formed by splicing two straight cylindrical collecting pipes, and the pipe cavities of the two collecting pipes of the first collecting member 3 are independent and not communicated with each other. The tube cavities of the two collecting pipes of the second collecting piece 4 are communicated with each other.

Optionally, the first collecting piece 3 and the second collecting piece 4 may have more than two collecting chambers, or may have a plurality of collecting chambers, or may adopt a plurality of rows (more than two rows) of heat exchange tubes, the heat exchange tubes are connected by the connecting portion 53, and the heat exchange tubes are communicated with the respective corresponding collecting chambers. Or, only one manifold is arranged inside each of the first manifold 3 and the second manifold 4, the first manifold 3 has an input manifold, the second manifold 4 has an output manifold, one inlet and one outlet are arranged, and the heat exchange piece 52 communicated with the two manifolds adopts a plurality of rows (at least two rows) of heat exchange tubes.

The heat exchange piece 5 of the heat exchanger of this application adopts the multirow heat exchange tube to link to each other the multirow heat exchange tube through connecting portion 53, make between the heat exchange piece 5 layer and layer separate and form a plurality of first passageways that are used for circulating second heat transfer medium, reduce the phenomenon of fluid series flow, improved heat exchange efficiency.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A heat exchanger, comprising:

the shell comprises a shell body (1), wherein the shell body (1) comprises a first end (11) and a second end (12) which are arranged oppositely, and the shell body (1) is provided with an inner cavity penetrating through the first end (11) and the second end (12);

a first collector piece (3) and a second collector piece (4), the first collector piece (3) being connected to the first end (11) and the second collector piece (4) being connected to the second end (12);

the heat exchange pieces (5) are arranged at intervals and in parallel, at least part of the heat exchange pieces (5) are positioned in the inner cavity of the shell (1), the inner cavity of the shell (1) is divided by the heat exchange pieces (5) to form a plurality of first channels (13), and the inner cavity of the first current collecting piece (3) is communicated with the inner cavity of the second current collecting piece (4) through the heat exchange pieces (5);

the heat exchange member (5) includes a first heat exchange pipe (51), a second heat exchange pipe (52), and a connection portion (53) connected between the first heat exchange pipe (51) and the second heat exchange pipe (52).

2. A heat exchanger according to claim 1, wherein the first heat exchanging tube (51), the second heat exchanging tube (52) and the connecting portion (53) are integrally formed.

3. A heat exchanger according to claim 1, wherein the first heat exchange tube (51) and the second heat exchange tube (52) each comprise two joint segments (511) and a body segment (512) between the two joint segments (511), the connecting portion (53) and the body segment (512) are arranged in alignment in the width direction of the heat exchange member (5), and the two joint segments (511) open into the first collecting member (3) and the second collecting member (4), respectively.

4. A heat exchanger according to claim 1, characterised in that the first heat exchanger tube (51) and the second heat exchanger tube (52) are of the same construction, the first heat exchanger tube comprising two connector segments (511) and a body segment (512) located between the two connector segments (511), the two connector segments (511) opening into the first collector member (3) and the second collector member (4), respectively, and the connection portion (53) opening into the first collector member (3) and the second collector member (4), respectively, at both ends.

5. The heat exchanger according to claim 3 or 4, wherein the width of the joint segment (511) is smaller than the width of the main body segment (512), and a step portion (513) is formed between the main body segment (512) and the joint segment (511), respectively, and the step portion (513) abuts against the first collecting member (3) and the second collecting member (4).

6. The heat exchanger according to any of claims 1 to 4, characterized in that the heat exchange element (5) comprises a first side wall (54) and a second side wall (55) on opposite sides, the first side wall (54) and the second side wall (55) being connected to the inner wall of the housing (1).

7. The heat exchanger according to claim 6, characterized in that at least one of the first side wall (54) and the second side wall (55) is curved or square in cross-section.

8. A heat exchanger according to any one of claims 1 to 4, characterised in that the first manifold (3) comprises a first and a second manifold independent of each other, the second manifold (4) comprises a third and a fourth manifold, the first and third manifolds communicating through the lumen of the first heat exchange tube (51), the second and fourth manifolds communicating through the lumen of the second heat exchange tube (52).

9. The heat exchanger according to claim 8, characterized by comprising an input connector (6) and an output connector (7) for connecting external pipes, wherein the input connector (6) and the output connector (7) are both connected with the first collecting member (3), the input connector (6) and the output connector (7) are arranged along a direction perpendicular to the arrangement direction of the heat exchanging members (5), the input connector (6) and the output connector (7) are respectively provided with a second channel (61) and a third channel (71), the second channel (61) is communicated with the first collecting chamber, and the third channel (71) is communicated with the second collecting chamber.

10. A heat exchanger according to claim 9, wherein the second channel (61) is opposite to the lumen of at least one of the first heat exchange tubes (51) and the third channel (71) is opposite to the lumen of at least one of the second heat exchange tubes (52).