WO2020024965A1

WO2020024965A1 - Heat exchanger and processing method therefor

Info

Publication number: WO2020024965A1
Application number: PCT/CN2019/098521
Authority: WO
Inventors: 张伟伟; 董军启; 高建华
Original assignee: 杭州三花研究院有限公司
Priority date: 2018-08-01
Filing date: 2019-07-31
Publication date: 2020-02-06
Also published as: CN110793353B; CN110793353A

Abstract

A heat exchanger and a processing method therefor, the heat exchanger comprising: a first assembly that comprises at least one first flat tube (1) and first flow collecting tubes (2) disposed at two ends of the first flat tube (1); a second assembly that comprises at least two second flat tubes (3) and second flow collecting tubes (4) disposed at two ends of the second flat tubes (3), wherein the one first flat tube (1) is attached between the two adjacent second flat tubes (3), and the first flow collecting tubes (2) are placed in the second flow collecting tubes (4); the second flow collecting tubes (4) are opened with accommodating portions (41) for accommodating end parts of the first flat tube (1) and the second flat tubes (3), one end of the second flow collecting tubes (4) is opened with mounting holes (42) that communicate with the accommodating portions (41), and the mounting holes (42) may serve as mounting passages for placing portions of the first flat tube (1) in the accommodating portions (41). The first assembly and the second assembly of the heat exchanger may be separately produced and then assembled, the production and fabrication process is simple, and a matching gap may be reduced to facilitate mounting and welding.

Description

Heat exchanger and processing method thereof

This application claims priority from a Chinese patent application with a filing date of August 1, 2018, an application number of 201810860653.5, and an invention name of "a heat exchanger and a processing method thereof", the entire contents of which are incorporated herein by reference. in.

Technical field

The present application relates to the field of heat exchange technology, and in particular, to a heat exchanger and a processing method thereof.

Background technique

Intermediate heat exchangers in related technologies mostly use a sleeve type, that is, inner and outer tubes are provided, and the inner tube and the outer tube are coaxially arranged concentrically and separated from the inside and the outside. The high temperature, high pressure (or low temperature and low pressure) liquid (or gaseous) flows in the inner tube. Refrigerant, low temperature and low pressure (or high temperature and high pressure) gaseous (or liquid) refrigerant flows in the outer tube, and the inner and outer tubes transfer heat to each other.

The above heat exchanger has the problem that the structure is complicated and compact, and it is not convenient to process.

Summary of the invention

The object of the present application is to provide a heat exchanger with a compact structure.

To achieve this, the following technical solutions are used in this application:

A heat exchanger includes:

A first component including at least one first flat tube and first headers disposed at both ends of the first flat tube;

The second component includes at least two second flat tubes and second headers disposed at both ends of the second flat tube, and one of the first flat tubes is attached between two adjacent second flat tubes. The first header is placed in the second header;

The second header is provided with an accommodating portion for accommodating the end portion of the first flat tube and the end of the second flat tube, and one end of the second header is accommodating the communication portion. A mounting hole, part of the first flat tube is placed in the opening through the mounting hole.

Optionally, the heat exchanger further includes an insert plate, and the insert plate is inserted into the installation hole to block the installation hole.

Optionally, the heat exchanger further includes two second pressure plates, wherein one of the second pressure plates is disposed at one end of the second header opening the mounting hole, and the other of the second pressure plates is disposed at the other One end of the second header is not provided with the mounting hole.

Optionally, the heat exchanger further includes two end caps, and the two end caps are sealedly disposed at an end of the second header that is not connected to the second pressure plate, and an end cap is provided on the end cap. The through hole through which the first header is passed is described.

Optionally, the axis of the through-hole is offset from the axis of the second header.

Optionally, the heat exchanger further includes a first pressure plate, and the first pressure plate is disposed at an end of the first header passing through the through hole.

Optionally, one of the second pressure plates and the end cover is provided with a slot for inserting a board, and a part of the insert is inserted into the slot for inserting the board.

Optionally, the insertion plate is fixed in one of the second pressing plates and one of the end caps.

The application also provides a method for processing a heat exchanger, including the following steps:

Assemble and fix the first header tube and at least one first flat tube into a first component;

Providing a second header, and accommodating a portion on a side wall of the second header, and a mounting hole at one end of the accommodating portion;

Placing the assembled first flat tube in the receiving portion through the mounting hole, and placing the first header tube in the second header tube;

Providing a second flat tube, placing the second flat tube on both sides of the first flat tube through the receiving portion, and welding the second flat tube to the receiving portion;

Passing the first current collecting tube through an end cover and installing a first pressure plate;

A second pressure plate is installed on one end of the second header to form a heat exchanger.

Optionally, the assembling and fixing the first component includes:

The two ends of the first flat tube are extended into the first header, and the first flat tube and the first header are welded to form the first component.

Optional, also includes:

After the first header is placed on the second header, a plug-in board is inserted into the mounting hole to block the mounting hole.

Optionally, after the end cover, the first pressure plate, the second pressure plate, and the plug-in plate are installed, welding is performed on various connection parts to form the heat exchanger.

The application also provides a heat exchanger, which includes:

The first component includes a first flat tube and two first headers disposed at both ends of the first flat tube, and one of the first headers is provided with a first inlet for a first refrigerant to flow in, Another said first header is provided with a first outlet for the first refrigerant to flow out;

The second component includes a second flat tube and two second headers disposed at both ends of the second flat tube, and the second flat tube is directly or indirectly in contact with the first flat tube; one of them The second header is provided with a second inlet for the second refrigerant to flow in, and the other second header is provided with a second outlet for the second refrigerant to flow out; the first refrigerant is at the first The flow direction in the flat tube is opposite to the flow direction of the second refrigerant in the second flat tube;

The first header is sleeved with the second header, wherein the axis of the first header does not overlap the axis of the second header.

Optionally, there are at least two first flat tubes and second flat tubes, and the first flat tubes and the second flat tubes are alternately arranged.

Optionally, the second flat tube and the first flat tube are fixed together by brazing.

Optionally, the first header is placed in the second header; the second header is provided with a receiving portion for receiving the first flat tube and the end of the second flat tube An end of the second header is provided with a mounting hole communicating with the receiving portion, and a part of the first flat tube is placed in the receiving portion through the mounting hole.

Optionally, the heat exchanger further includes two end covers and two first pressure plates, and the two end covers are sealedly disposed at an end of the second header that does not communicate with the second pressure plate, and each One end cover is provided with a through hole through which the corresponding first header passes; the two first pressure plates are correspondingly disposed at one end of the first header through the through hole, respectively. . Optionally, a plug-in board slot is provided on the second pressing plate and a corresponding end cover at one end of the mounting hole, and at least a part of the plug-in board is inserted into the plug-in board slot.

In the heat exchanger of the present application, the first header tube and the first flat tube are assembled and fixed to form a first component, the first header tube and the second header tube are sleeved together, and the second header tube is provided with a receiving section. A flat tube and a receiving portion of the second flat tube end have a mounting hole communicating with the receiving portion on one side of the second header, and the first header can be inserted into the second header through the mounting hole. Thus, the assembly of the first component and the second component is realized, and the heat exchanger has a compact structure.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic exploded structure diagram of a heat exchanger according to Embodiment 1 of the present application;

2 is a schematic perspective view of a heat exchanger according to the first embodiment of the present application;

3 is a schematic structural diagram of a heat exchanger hiding a first pressure plate and a second pressure plate according to the first embodiment of the present application;

4 is a schematic structural diagram of a first component according to the first embodiment of the present application;

FIG. 5 is an exploded structure diagram of a second component according to the first embodiment of the present application; FIG.

6 is a schematic structural diagram of a second header according to Embodiment 1 of the present application;

7 is a schematic structural diagram of an end cap according to the first embodiment of the present application;

8 is a schematic structural diagram of a second pressure plate provided with a slot for inserting a plate according to the first embodiment of the present application;

9 is a flowchart of a method for processing a heat exchanger according to Embodiment 1 of the present application;

10 is a schematic structural diagram of an end cap according to Embodiment 2 of the present application;

11 is a flowchart of a method for processing a heat exchanger according to a second embodiment of the present application.

In the picture:

1. First flat tube; 2. First header tube; 3. Second flat tube; 4. Second header tube; 5. Second pressure plate; 6. End cover; 7. First pressure plate; 8. Insert Board; 9, slot for inserting board; 41, receiving part; 42, mounting hole; 61, through hole.

detailed description

The technical solutions of the present application will be further described below with reference to the accompanying drawings and specific embodiments.

Example one

This embodiment provides a heat exchanger. As shown in FIGS. 1-3, the heat exchanger includes a first component, a second component, a second pressure plate 5, an end cover 6, and a first pressure plate 7, wherein:

As shown in FIG. 4, the first component includes a first flat tube 1 and first headers 2 disposed at both ends of the first flat tube 1. A high-pressure refrigerant can flow in the first header 2. Specifically, a first accommodating portion (not shown in the figure) is started on a side wall of the first header tube 2. Both ends of the first flat tube 1 are inserted into the first accommodating portion, and the first flat tube 1 It is welded with the side wall of the first current collecting tube 2 through a brazing process to form a Z-shaped first component, thereby reducing contact thermal resistance and improving heat exchange efficiency. In this embodiment, the number of the above-mentioned first flat tubes 1 is not limited to one, but may be plural. When a plurality of first flat tubes 1 are provided, both ends of the plurality of first flat tubes 1 are inserted into the first set. The flow tube 2 is connected by welding.

As shown in FIG. 3 and FIG. 5, the above-mentioned second component includes two second flat tubes 3, two second headers 4, two end covers 6, and two insert plates 8, wherein:

The two second flat tubes 3 are attached to two sides of the first flat tube 1, that is, the first flat tube 1 is located between the two second flat tubes 3. Two ends of the two second flat tubes 3 are respectively disposed on the two second headers 4, and the low-pressure refrigerant can flow in the second headers 4. The second flat tube 3 is directly or indirectly in contact with the first flat tube 1 for heat exchange; wherein the manner in which the second flat tube 3 is in direct contact with the first flat tube 1 includes, for example, The second flat tube 3 is welded to the first flat tube 1; the manner in which the second flat tube 3 is in indirect contact with the first flat tube 1 includes, for example, finning the second flat tube 3 The tube 3 is welded to the first flat tube 1. The first header 2 and the second header 4 are sleeved together. In the embodiment shown in the present application, the first header 2 is placed in the second header 4. It can be understood that the number of the above-mentioned second flat tubes 3 may be one or more than two. At this time, the corresponding number of the first flat tubes 1 should be more than one, and two adjacent second flat tubes 3 A first flat tube 1 is attached between them, and the first flat tube 1 and the second flat tube 3 are alternately arranged.

In this embodiment, as shown in FIG. 6, the side wall of the second header 4 is provided with a receiving portion 41, and one end of the receiving portion 41 is provided with a mounting hole extending to an end surface of the second header 4. 42. The mounting hole 42 can be used as a mounting channel for placing an end portion of the first flat tube 1 in the receiving portion 41. While the above-mentioned first header tube 2 is fitted in the second header tube 4, the end of the first flat tube 1 of the first component can extend into the receiving portion 41 through the mounting hole 42, that is, through the mounting hole 42 and the receiving portion. The portion 41 can realize the installation and extension of the first header 2 and the first flat tube 1 at both ends of the first component. In this embodiment, the end of the second flat tube 3 extends into the accommodating portion 41 to realize the communication between the second header tube 4 and the second flat tube 3.

Preferably, the width of the accommodating portion 41 is greater than the sum of the thickness of the first flat tube 1 and the thickness of the two second flat tubes 3 by 0.05 mm-0.3 mm, thereby facilitating the first flat tube 1 and the two second flat tubes 3 Entering, the width of the mounting hole 42 is larger than the thickness of the first flat tube 1 by 0.05 mm-0.3 mm to facilitate the assembly of the first component.

The two end caps 6 are provided respectively, and the ends on the different sides of the two second headers 4 are respectively sealed, that is, one of the end caps 6 is provided on the first end of a second header 4 and the other The end cap 6 is provided with a second end (an end corresponding to the first end, as shown in FIG. 5) of another second header 4.

As shown in FIG. 7, a through hole 61 is opened in the end cover 6. The end of the first header 2 can be sealed through the through hole 61, and the first header can be realized through the through hole 61. Positioning and fixing of 2. Further, the axis of the through-hole 61 is disposed offset from the axis of the second header 4, and accordingly, the axis of the first header 2 is disposed from the axis of the second header 4. Please refer to FIG. 3, that is, the axis of the first header 2 and the axis of the second header 4 do not overlap. This structure can facilitate entry of the refrigerant in the second header 4. In this embodiment, the diameter of the through hole 61 is larger than the diameter of the first header 2 by 0.1 mm-0.3 mm.

In this embodiment, after the first component is assembled into the second header 4, the above-mentioned insert plate 8 is inserted into the above-mentioned mounting hole 42 to block the mounting hole 42. Further, the above-mentioned insert plate 8 is an aluminum plate with a double-sided composite layer, which serves the purpose of sealing and positioning the end cover 6, and the thickness of the above-mentioned insert plate 8 is the same as the width of the mounting hole 42 to achieve the purpose of tight fitting.

The above heat exchanger is provided with two second pressure plates 5 and two first pressure plates 7, as shown in FIG. 2. One of the second pressure plates 5 is disposed at one end of the second header 4 where the mounting hole 42 is opened, and the other one The two pressure plates 5 are disposed at one end of the other second header 4 that is not provided with a mounting hole 42. The two first pressure plates 7 are respectively disposed at one ends of the through holes 61 of the two first headers 2 passing through the end cover 6.

In this embodiment, in this embodiment, one of the second pressure plates 5 is provided with an inserting slot 9 (refer to FIG. 8) and one of the end covers 6 is provided with an inserting slot 9 (refer to FIG. 7). When the plug-in board 8 is inserted into the mounting hole 42, the mounting hole 42 will be partially exposed. At this time, a plug-in slot 9 is provided on the second pressure plate 5 and the end cover 6 at one end of the mounting hole 42. The plug-in slot 9 The length of the plug-in board 8 is the same as that of the plug-in board 8 exposing the mounting hole 42. The plug-in board 8 is inserted into the plug-in board slot 9 to achieve sealing.

When the above heat exchanger of this embodiment is in use, the first refrigerant enters the first header 2 from the first pressure plate 7 on the first side and the first inlet of the first header 2, and then flows into the first flat tube 1, It flows out through the first outlet of the first header 2 on the second side. The second refrigerant enters the second header 4 from the second pressure plate 5 and the second inlet of the second header 4 on the second side, and then flows to the two second flat tubes 3 and communicates with the two second flat tubes. The first flat tube 1 between 3 performs heat exchange, and the flow direction of the first refrigerant is opposite to the flow direction of the second refrigerant, thereby achieving convective heat exchange between the two, and the second refrigerant passes through the second header 4 on the first side. The second outlet flows out.

In the heat exchanger of this embodiment, after the first component and the second component are separately produced, the first header 2 of the first component is assembled into the second header 4 of the second component, and then each of the The brazing at the connection position can relatively easily manufacture the heat exchanger, and the heat exchanger of this embodiment has a compact structure, small thermal resistance, and higher heat exchange efficiency. At this time, the second flat tube 3 and the first flat tube 1 are fixed together by brazing to reduce the contact thermal resistance and improve the heat exchange efficiency of the flat tubes on the high and low pressure sides.

The present application also provides a processing method for a heat exchanger, which is applicable to the processing of the above heat exchanger. Specifically, as shown in FIG. 9, the processing method includes the following steps:

S100. Assemble and fix the first header tube 2 and at least one first flat tube 1 into a first component.

Specifically, the first header 2 is processed, and a first receiving portion is opened on the side wall of the first header 2, and then both ends of the first flat tube 1 are inserted into the two first through the first receiving portion. Inside the header tube 2, the first flat tube 1 and the first header tube 2 are then welded together by brazing to form a first component. In this embodiment, there is one first flat tube 1.

S101. A second header 4 is provided, and an accommodating portion 41 is opened on a side wall of the second header 4 and a mounting hole 42 is opened at one end of the accommodating portion 41.

The second header 4 is processed, and a receiving portion 41 is opened on the side wall of the second header 4. At the same time, a mounting hole 42 is opened at one end of the receiving portion 41, and the mounting hole 42 extends to the second header 4. Ends.

S102. The assembled first flat tube 1 is placed in the accommodating portion 41 through the mounting hole 42, and the first header tube 2 is placed in the second header tube 4.

That is, after the second header 4 is processed, the first flat tube 1 of the first component is pushed into the receiving portion 41 from the mounting hole 42, and the first header 2 is placed on the second header 4 at the same time. Inside. After the first header 2 is placed in the second header 4, the inserting plate 8 is inserted into the mounting hole 42 and the mounting hole 42 is blocked.

S103. A second flat tube 3 is provided, and the second flat tube 3 is placed on both sides of the first flat tube 1 through the receiving portion 41, and the second flat tube 3 and the receiving portion 41 are welded.

Process at least two second flat tubes 3 (preferably two in this embodiment), and place two second flat tubes 3 on both sides of the first flat tube 1 while both ends of the second flat tube 3 They are placed in the receiving portions 41 of the two second headers 4, and then the second flat tube 3 and the receiving portions 41 are welded by brazing.

S104. Pass the first header 2 through the end cover 6 and install the first pressure plate.

After step S103, an end cover 6 is first fitted on one end of the second header 4 and one end of the first header 2 passes through the end cover 6, and then a first is installed on the end of the end cover 6. A pressure plate 7. The first pressure plate 7 is in communication with the first header 2 but not in communication with the second header 4.

S105. Install a second pressure plate on one end of the second header to form a heat exchanger.

That is, a second pressure plate 5 is installed at the other end of the second header 4, and the other end of the first header 2 is disposed through the second pressure plate 5, and the second pressure plate 5 is in communication with the second header 4. However, it is not in communication with the first header 2. Subsequently, each connection part is welded to form a heat exchanger.

In the method for processing the above-mentioned heat exchanger of this embodiment, the first component and the second component are separately produced and then assembled, and the production process is simple and easy to manufacture.

Example two

The difference between this embodiment and the first embodiment is that the structure of the end cap 6 and the second pressure plate 5 provided with the mounting hole 42 side in this embodiment are different. Specifically, as shown in FIG. 10, this embodiment is provided with An insert plate 8 is provided on the inner wall of the end cover 6 on the side of the mounting hole 42. The length of the insert plate 8 is the same as the length of the mounting hole 42. When the end cover 6 is installed, the insert plate 8 in the end cover 6 is just inserted into the installation hole. 42, and the mounting hole 42 is blocked. Correspondingly, a second pressure plate 5 on one side of the mounting hole 42 is provided, and an insert plate 8 (not shown in the figure) is provided on one end surface. The length of the insert plate 8 is the same as the length of the installation hole 42. When the cover 6 is inserted, the inserting plate 8 in the second pressure plate 5 is just inserted into the mounting hole 42, and the mounting hole 42 is blocked.

The other structures of the heat exchanger of this embodiment are the same as those of the first embodiment, and details are not described herein again.

This embodiment also provides a method for processing a heat exchanger, which is different from the processing method described in the first embodiment only in the above-mentioned end cover 6 provided with a mounting hole 42 and the second pressure plate 5 during processing. The difference is that during processing, the plug-in board 8 needs to be processed simultaneously. The remaining processing methods and the first embodiment are the same, and will not be described again. Specifically, as shown in FIG. 11, the processing method of the heat exchanger of this embodiment includes the following steps:

S200. Extend both ends of the at least one first flat tube 1 into the first header tube 2 and weld the first flat tube 1 and the first header tube 2 to form a first component.

That is, the first header 2 is processed, and a first receiving portion is opened on the side wall of the first header 2, and then both ends of the first flat tube 1 are inserted into the two first headers through the first receiving portion. 2, then the first flat tube 1 and the first header 2 are welded together by brazing to form a first component. In this embodiment, there is one first flat tube 1.

S201. A second header 4 is provided, and an accommodating portion 41 is opened on a side wall of the second header 4 and a mounting hole 42 is opened at one end of the accommodating portion 41.

That is, the second header 4 is processed, and a receiving portion 41 is opened on the side wall of the second header 4. At the same time, an end of the receiving portion 41 is provided with a mounting hole 42 that extends to the second header 4 Of the end.

S202. The assembled first flat tube 1 is placed in the accommodating portion 41 through the mounting hole 42, and the first header tube 2 is placed in the second header tube 4.

That is, after the second header 4 is processed, the first flat tube 1 of the first component is pushed into the receiving portion 41 from the mounting hole 42, and the first header 2 is placed on the second header 4 at the same time. Inside.

S203. A second flat tube 3 is provided, and the second flat tube 3 is placed on both sides of the first flat tube 1 through the receiving portion 41, and the end of the second flat tube 3 is extended into the receiving portion 41.

Process at least two second flat tubes 3 (preferably two in this embodiment), and place two second flat tubes 3 on both sides of the first flat tube 1, while the two ends of the second flat tube 3 are respectively It extends into the receiving portions 41 of the two second headers 4.

S204. Install the end cover 6 and insert the inserting plate 8 into the mounting hole 42.

After step S203, an end cover 6 is first fitted on one end of the second header 4, and one end of the first header 2 is set through the end cover 6. At the same time, the inserting plate 8 integrally formed with the end cover 6 is inserted into the mounting hole 42 to block the mounting hole 42.

S205. Install a first pressure plate 7 in communication with the first header 2 and a second pressure plate 5 in communication with the second header 4.

That is, a first pressure plate 7 is installed at an end of the end cover 6, and the first pressure plate 7 is in communication with the first header 2 but not in communication with the second header 4. Thereafter, a second pressure plate 5 is installed at the other end of the second header 4, and the other end of the first header 2 is disposed through the second pressure plate 5, and the second pressure plate 5 is in communication with the second header 4. However, it is not in communication with the first header 2.

S206: Weld the connection parts such as the second flat tube, the end cover, the first pressure plate, and the second pressure plate to form a heat exchanger.

That is, after step S205, the installed connection parts such as the second flat tube 3, the end cap 6, the first pressure plate 7, and the second pressure plate 5 are brazed, so that the connection parts are sealed and connected to form a heat exchanger.

Obviously, the foregoing embodiments of the present application are merely for the purpose of clearly illustrating the examples made in the present application, and are not intended to limit the implementation of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. There is no need and cannot be exhaustive for all implementations. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection scope of the claims of this application.

Claims

A heat exchanger comprising:

The first component includes at least one first flat tube (1) and first headers (2) provided at both ends of the first flat tube (1);

The second component includes at least two second flat tubes (3) and second headers (4) provided at both ends of the second flat tubes (3), and adjacent two second flat tubes (3) One of the first flat tubes (1) is affixed to each other, and the first header (2) is placed in the second header (4);

The second header (4) is provided with a receiving portion (41) for receiving an end portion of the first flat tube (1) and an end of the second flat tube (3). One end of the flow tube (4) is provided with a mounting hole (42) communicating with the receiving portion (41), and a portion of the first flat tube (1) is placed in the receiving portion (41) through the mounting hole (42) )Inside.
The heat exchanger according to claim 1, wherein the heat exchanger further comprises an insert plate (8), the insert plate (8) is inserted into the mounting hole (42) to block the installation Hole (42).
The heat exchanger according to claim 2, characterized in that the heat exchanger further comprises two second pressure plates (5), wherein one of the second pressure plates (5) is disposed on a second header ( 4) One end of the mounting hole (42) is opened, and the other second pressure plate (5) is disposed on another end of the second header (4) where the mounting hole (42) is not opened.
The heat exchanger according to claim 3, characterized in that the heat exchanger further comprises two end caps (6), and the two end caps (6) are sealedly disposed on the second header (4) One end of the second pressure plate (5) is not connected, and the end cover (6) is provided with a through hole (61) through which the first current collecting pipe (2) passes.
The heat exchanger according to claim 4, characterized in that the axis of the through hole (61) is offset from the axis of the second header (4).
The heat exchanger according to claim 5, characterized in that the heat exchanger further comprises a first pressure plate (7), and the first pressure plate (7) is disposed on the first header (2). Through one end of the through hole (61).
The heat exchanger according to any one of claims 4 to 6, characterized in that one of the second pressure plate (5) and the end cover (6) is provided with an insert plate slot (9), and the insert A part of the board (8) is inserted into the board insertion slot (9).
The heat exchanger according to any one of claims 4 to 6, characterized in that the insertion plate (8) is fixed in one of the second pressure plates (5) and one of the end covers (6). .
A method for processing a heat exchanger is characterized in that it includes the following steps:

Assemble and fix the first header tube (2) and at least one first flat tube (1) into a first component;

A second header (4) is provided, and a receiving portion (41) is opened on the side wall of the second header (4), and a mounting hole (42) is opened at one end of the receiving portion (41);

The assembled first flat tube (1) is placed in the receiving portion (41) through the mounting hole (42), and the first header tube (2) is placed in the second In the header (4);

A second flat tube (3) is provided, the second flat tube (3) is placed on both sides of the first flat tube (1) through the receiving portion (41), and the second flat tube (3) ) Welded to the receiving portion (41);

Passing the first header (2) through an end cover (6) and installing a first pressure plate (7);

A second pressure plate (5) is installed on one end of the second header (4) to form a heat exchanger.
The processing method according to claim 9, wherein the assembling and fixing the first component comprises:

Extending both ends of the first flat tube (1) into the first header (2), and welding the first flat tube (1) and the first header (2) To form the first component.
The processing method according to claim 10, further comprising:

After the first header (2) is placed on the second header (4), a plug-in plate (8) is inserted into the mounting hole (42), and the mounting hole (42) is blocked .
The processing method according to claim 11, characterized in that the end cover (6), the first pressing plate (7), the second pressing plate (5) and the inserting plate (8) are installed. Then, welding is performed on each connection part to form the heat exchanger.
A heat exchanger comprising:

The first component includes a first flat tube (1) and two first headers (2) provided at both ends of the first flat tube (1), and one of the first headers (2) A first inlet is provided for the first refrigerant to flow in, and the other first header (2) is provided with a first outlet for the first refrigerant to flow out;

The second component includes a second flat tube (3) and two second headers (4) provided at both ends of the second flat tube (3), the second flat tube (3) and the second flat tube (3) The first flat tube (1) is in direct or indirect contact; one of the second headers (4) is provided with a second inlet for the second refrigerant to flow in, and the other of the second headers (4) is provided There is a second outlet for a second refrigerant to flow out; the flow direction of the first refrigerant in the first flat tube (1) and the flow direction of the second refrigerant in the second flat tube (3) in contrast;

The first header (2) and the second header (4) are sleeved together, wherein the axis of the first header (2) and the second header (4) The axes do not overlap.
The heat exchanger according to claim 13, characterized in that each of the first flat tube (1) and the second flat tube (3) is at least two, and the first flat tube (1) and The second flat tubes (3) are arranged alternately.
The heat exchanger according to claim 13, characterized in that the second flat tube (3) and the first flat tube (1) are fixed together by brazing.
The heat exchanger according to claim 13, characterized in that the first header (2) is placed in the second header (4); the second header (4) is opened There is an accommodating part (41) for accommodating the end of the first flat tube (1) and the end of the second flat tube (3). The mounting hole (42) of the receiving portion (41), and a part of the first flat tube (1) is placed in the receiving portion (41) through the mounting hole (42).
The heat exchanger according to claim 16, characterized in that the heat exchanger further comprises a plug-in plate (8), which is inserted into the mounting hole (42) to block the installation Hole (42).
The heat exchanger according to claim 17, wherein the heat exchanger further comprises two second pressure plates (5), wherein one of the second pressure plates (5) is disposed on a second header ( 4) One end of the mounting hole (42) is opened, and the other second pressure plate (5) is disposed on another end of the second header (4) where the mounting hole (42) is not opened.
The heat exchanger according to claim 18, characterized in that the heat exchanger further comprises two end covers (6) and two first pressure plates (7), and the two end covers (6) are hermetically arranged An end of the second header (4) that is not connected to the second pressure plate (5), and each of the end covers (6) is provided with a corresponding first header (2). A through hole (61) passed through; the two first pressure plates (7) are respectively correspondingly disposed at one end of the first header (2) passing through the through hole (61).
The heat exchanger according to claim 19, wherein a plug plate is provided on the second pressure plate (5) and the corresponding end cover (6) at one end of the mounting hole (42). A slot (9), at least a part of the insert plate (8) is inserted into the insert plate slot (9).