WO2016023466A1

WO2016023466A1 - Heat exchanger, and method for manufacturing heat exchanger

Info

Publication number: WO2016023466A1
Application number: PCT/CN2015/086634
Authority: WO
Inventors: 蒋建龙; 陈红兵
Original assignee: 丹佛斯微通道换热器（嘉兴）有限公司
Priority date: 2014-08-13
Filing date: 2015-08-11
Publication date: 2016-02-18
Also published as: CN104154778B; CN104154778A

Abstract

Provided are a heat exchanger (100), and a method for manufacturing said heat exchanger (100), the heat exchanger (100) comprising: a heat exchange tube (10) and a fin (20); the fin (20) comprises: a fin body (21), a fin hole (22) formed on the fin body (21) and used for arranging the heat exchange tube (10); a ring-shaped fin hole flange (23) extending from the edge of the fin hole (22) to one side of the fin body (21); and welding material, used for welding together the fin hole flange (23) of the fin body (21) and the heat exchange tube (10). The heat exchanger (100) and method for manufacturing same solve the problem of a small-pipe-diameter heat exchanger being unable to expand and impossible to produce; at the same time, since welding is used for the fin (20) and the heat exchange tube (10), heat transfer performance is very good.

Description

Heat exchanger and method of manufacturing heat exchanger

Technical field

Embodiments of the present invention relate to a heat exchanger and a method of manufacturing the heat exchanger.

Background technique

The same heat exchanger size, the smaller the hydraulic diameter of the heat exchange tube, the higher the heat transfer performance and the lower the material cost. However, the mechanical expansion tube technology is greatly affected by the diameter of the heat exchange tube, and can only be applied to copper tubes larger than a certain diameter (for example, greater than 7 mm), and the aluminum tube is not suitable for this technology.

Summary of the invention

An object of an embodiment of the present invention is to provide a method of manufacturing a heat exchanger and a heat exchanger, whereby, for example, not only the heat exchange performance of brazing but also a small-diameter heat exchanger can be manufactured.

According to an embodiment of the present invention, there is provided a heat exchanger comprising: a heat exchange tube; a fin, the fin comprising: a fin body formed in the fin body for setting up a change a fin hole of the heat pipe, and an annular fin hole flange extending from an edge of the fin hole toward one side of the fin body; and a welding material for flanging and heat exchange of the fin hole of the fin body The tubes are welded together.

According to an embodiment of the invention, the heat exchange tubes are round tubes or flat tubes.

According to an embodiment of the present invention, the welding material is formed as a ring member and disposed between the heat transfer tube and the fin hole flange of the fin body to turn the fin hole of the fin body by heating The side is welded to the heat exchange tube.

According to an embodiment of the present invention, the heat exchanger further includes: a ring member disposed between the heat transfer tube and the fin hole flange of the fin body, and an inner side surface of the ring member Both the outer surface and the outer surface have a welded composite layer as a welding material.

According to an embodiment of the present invention, the size of the fin hole flange of the front fin body is smaller than the size of the heat exchange tube, so that the fin hole of the fin main body is formed with the heat exchange tube. Fit.

According to an embodiment of the invention, the fin body further includes a slit formed in the fin hole flange.

According to an embodiment of the invention, the heat exchange tubes are round tubes and have a diameter of less than 7 mm.

According to an embodiment of the invention, the outer surface of the ring member is a tapered surface, and the inner surface of the fin hole flange of the fin body is a tapered surface.

According to an embodiment of the invention, the heat exchanger further includes: a ring member disposed between the heat exchange tube and the fin hole flange of the fin body.

According to an embodiment of the invention, the fins, the heat exchange tubes and the ring members are made of an aluminum alloy.

According to an embodiment of the present invention, there is provided a method of manufacturing a heat exchanger, the method of manufacturing the heat exchanger comprising: providing a heat exchange tube; forming a fin, the fin comprising: a fin body formed on the fin body a fin hole for setting a heat exchange tube, and an annular fin hole flange extending from an edge of the fin hole toward one side of the fin body; by placing the heat exchange tube into the fin hole The heat exchange tube and the fin are assembled together; the fin hole of the fin body is flanged and welded to the heat exchange tube by using a welding material.

According to an embodiment of the present invention, in the step of assembling the heat exchange tube and the fin by placing the heat exchange tube into the fin hole, the ring member is placed in the ring of the heat exchange tube and the fin body The fin holes are turned between the flanges, and the inner side surface and the outer side surface of the ring member are provided with a welded composite layer as a welding material.

According to an embodiment of the invention, the size of the fin hole flange of the assembled front fin body is smaller than the size of the heat exchange tube, so that the fin hole flange of the fin body forms an interference fit with the heat exchange tube.

According to an embodiment of the present invention, the heat exchange tube is pre-coated with a solder paste before the heat exchange tube is assembled with the fins by placing the heat exchange tube into the fin hole.

According to an embodiment of the invention, the outer surface of the ring member is a tapered surface and the fin main The inner surface of the flange of the fin hole of the body is a tapered surface.

According to an embodiment of the present invention, the inner surface of the fin hole flange or the outer surface of the heat exchange tube is provided as a step of assembling the heat exchange tube and the fin together by placing the heat exchange tube into the fin hole. A welded composite layer of solder material.

The technical solution of the embodiment of the invention can not only solve the problem that the current small pipe diameter (<7mm) heat exchanger can not expand and cannot be produced, and at the same time, because the fin and the heat exchange tube adopt welding technology, the heat transfer performance is very good. .

DRAWINGS

1A and 1B are respectively a schematic side view and a cross-sectional view of a heat exchanger according to an embodiment of the present invention;

2 is a partial enlarged cross-sectional view of a heat exchanger according to an embodiment of the present invention;

Figure 3 is a front elevational view of a fin of a heat exchanger in accordance with an embodiment of the present invention;

4 is a cross-sectional view of a fin of a heat exchanger taken along a line passing through a fin hole, in accordance with an embodiment of the present invention;

5 is a schematic view of a heat exchange tube of a heat exchanger, a fin hole flange of a fin, and a ring member, wherein the ring member is not mounted to a final position, according to another embodiment of the present invention;

6 is a schematic view of a heat exchange tube of a heat exchanger, a fin hole flange of a fin, and a ring member, wherein the ring member is mounted to a final position, in accordance with another embodiment of the present invention.

detailed description

The invention will be further described below in conjunction with the drawings and specific embodiments.

1A and 1B illustrate a heat exchanger 100 in accordance with an embodiment of the present invention. As shown in FIGS. 1A and 1B, the heat exchanger 100 includes a heat exchange tube 10 and fins 20. The heat exchange tube 10 can have any cross-sectional shape, and can be a circular tube or a flat tube, or a non-circular tube of other shapes. The heat transfer tube 10 may have a diameter of less than 7 mm. The heat exchanger 100 can be used in the fields of HVAC, automotive, refrigeration and transportation, and can be used for heat exchangers such as evaporators, condensers, heat pump heat exchangers and water tanks. The heat exchange tubes are connected to the fins by brazing. The heat exchange tubes and fins may be aluminum alloy materials or other alloy materials.

As shown in FIGS. 2 to 4, the fin 20 includes a fin main body 21, fin holes 22 formed in the fin main body 21 for arranging the heat exchange tubes 10, and from the edge of the fin holes 22 An annular fin hole flange 23 extending on one side of the fin body 21. The heat exchanger 100 further includes a welding material for welding the fin hole flange 23 of the fin main body 21 with the heat exchange tube 10.

As shown in FIGS. 2 to 4, in some examples of the present invention, the size of the fin hole flange 23 of the pre-assembled fin main body 21 is smaller than the size of the heat exchange tube 10, thereby making the fin main body 21 after assembly. The fin hole flange 23 forms an interference fit with the heat exchange tube 10. The fin body 21 may further include a slit formed in the fin hole flange 23.

As shown in FIGS. 5 and 6, the welding material is formed as a ring member 30, and is disposed between the heat exchange tube 10 and the fin hole flange 23 of the fin body 21 to heat the fin body. The fin hole flange 23 of 21 is welded to the heat exchange tube 10. The ring member 30 as a welding ring may be a high thermal conductive material having a melting point lower than that of the fin and the heat exchange tube. After heating, the welding ring is melted to weld the fin and the heat exchange tube together.

Alternatively, as shown in FIGS. 5 and 6, the heat exchanger 100 further includes a ring member 30 disposed between the heat exchange tube 10 and the fin hole flange 23 of the fin body 21. And both the inner side surface and the outer side surface of the ring member 30 are provided with a welded composite layer as a welding material. The ring member 30 may be the same alloy as the fins and heat exchange tubes.

As shown in FIGS. 5 and 6, the outer surface of the ring member 30 is a tapered surface, and the inner surface of the fin hole flange 23 of the fin main body 21 is a tapered surface. The tapered surface of the ring member 30 and the tapered surface of the fin hole flange 23 of the fin main body 21 are fitted to each other, and the tapered surface of the ring member 30 is fixed to the cone of the fin hole flange 23 of the fin main body 21. Shaped.

A method of manufacturing a heat exchanger according to an embodiment of the present invention is described below.

Referring to FIGS. 1 to 4, the heat exchanger manufacturing method includes: providing a heat exchange tube 10; and forming a fin 20 including: a fin main body 21 formed in the fin main body 21 for setting The fin hole 22 of the heat exchange tube 10 and the annular fin hole flange 23 extending from the edge of the fin hole 22 toward one side of the fin main body 21. The method of manufacturing the heat exchanger further includes: assembling the heat exchange tube 10 and the fin 20 by placing the heat exchange tube 10 in the fin hole 22; and finping the fin body 21 with a solder material Flange 23 It is welded to the heat exchange tube 10.

According to an example of the present invention, the size of the fin hole flange 23 of the pre-assembled fin main body 21 is smaller than the size of the heat exchange tube 10, so that the fin hole flange 23 of the fin main body 21 is formed with the heat exchange tube 10. Interference fit. Before the step of assembling the heat exchange tubes and the fins by placing the heat exchange tubes into the fin holes, the inner surface of the fin hole flanges or the outer surface of the heat exchange tubes is provided with a welded composite layer as a welding material. That is, the surface of the fin or the heat exchange tube is welded with a composite layer, and the fin hole size is smaller than the diameter of the heat exchange tube. When installed, the heat exchange tube is forcibly pulled into the fin hole, and the fin hole can be cut with a slit to allow the wing The sheet hole and the fin hole flange 23 are expanded and contracted. The assembly is completed for welding.

The heat transfer tube 10 is pre-coated with solder paste by placing the heat exchange tubes 10 in the fin holes 22 to assemble the heat exchange tubes 10 and the fins 20. That is, there is no welded composite layer on the surface of the fins and the heat exchange tubes. Before assembly, the heat transfer tubes are pre-coated with solder paste, and then assembled for welding.

According to an example of the present invention, the welding material is formed as a ring member 30 and is disposed between the heat exchange tube 10 and the fin hole flange 23 of the fin body 21 to heat the fin body 21 by heating. The fin hole flange 23 is welded to the heat exchange tube 10. Alternatively, in the step of assembling the heat exchange tubes 10 and the fins 20 by placing the heat exchange tubes 10 into the fin holes 22, the ring members 30 are placed in the heat exchange tubes 10 and the fin bodies. Between the annular fin hole flanges 23 of 21, the inner side surface and the outer side surface of the ring member 30 are provided with a welded composite layer as a welding material.

By adopting the technical solution in the embodiment of the present invention, the manufacture of the small-diameter heat exchanger can be realized, and the technical problem that the small-diameter (for example, <7 mm) heat exchanger cannot be processed by the tube can be solved. The heat exchanger can have higher heat exchange performance and lower cost.

At present, most of the heat exchangers of large round pipes (for example, diameter > 7 mm) adopt the riser technology. Compared with direct welding, the contact thermal resistance of the riser connection is greater than that of the weld, so the heat transfer performance is not as good as the welded joint.

By using the connection method of the fins and the heat exchange tubes in the embodiment of the present invention, not only the heat exchange performance of the brazing can be ensured, but also a small diameter (for example, <7 mm) heat exchanger is manufactured, because the current expansion technology Can only be used on heat exchangers with a pipe diameter greater than, for example, 7 mm.

The technical solution in the embodiment of the present invention can not only solve the current small pipe diameter (For example, <7mm) The heat exchanger cannot expand the tube and cannot be produced. At the same time, because the fin and the heat exchange tube adopt welding technology, it has very good heat transfer performance.

By adopting the technical solution in the embodiment of the present invention, the ring member 30 is adopted, and since the fin hole and the heat exchange tube are gap-fitted, the heat exchange tube can be inserted into the fin hole very smoothly, thereby greatly reducing the process difficulty. And cost, improve product quality.

It is to be noted that all the technical features or some of the technical features in the above-described embodiments of the present invention may be combined in any suitable manner to form a new embodiment.

Claims

A heat exchanger comprising:

Heat exchange tube

a fin comprising: a fin body, a fin hole formed in the fin body for arranging the heat exchange tube, and a ring-shaped fin extending from an edge of the fin hole toward one side of the fin body a hole in the hole; and

A welding material for welding the fin holes of the fin body to the heat exchange tubes.
The heat exchanger of claim 1 wherein:

The heat exchange tube is a round tube or a flat tube.
The heat exchanger of claim 1 wherein:

The welding material is formed as a ring member, and is disposed between the heat exchange tube and the fin hole flange of the fin body to weld the fin hole of the fin body to the heat exchange tube by heating together.
The heat exchanger according to claim 1, further comprising:

a ring member disposed between the heat transfer tube and the fin hole flange of the fin body, and both the inner side surface and the outer side surface of the ring member are provided with a welded composite layer as a welding material.
The heat exchanger of claim 1 wherein:

The size of the fin hole flange of the front fin body is smaller than the size of the heat exchange tube, so that the fin hole flange of the fin main body forms an interference fit with the heat exchange tube.
The heat exchanger according to claim 5, wherein:

The fin body further includes a slit formed in the flange hole flange.
The heat exchanger of claim 1 wherein:

The heat exchange tube is a round tube and has a diameter of less than 7 mm.
A heat exchanger according to claim 3 or 4, wherein:

The outer surface of the ring member is a tapered surface, and the inner surface of the fin hole of the fin body is a tapered surface.
The heat exchanger according to claim 1, further comprising:

a ring member disposed between the heat exchange tube and the fin hole flange of the fin body.
The heat exchanger of claim 9 wherein:

The fins, heat exchange tubes and ring members are made of an aluminum alloy.
A method of manufacturing a heat exchanger, comprising:

Providing a heat exchange tube;

Forming a fin, the fin comprising: a fin body, a fin hole formed in the fin body for arranging the heat exchange tube, and an annular shape extending from an edge of the fin hole toward one side of the fin body Fin hole flanging;

The heat exchange tube and the fin are assembled by placing the heat exchange tube into the fin hole;

The fin hole of the fin body is flanged and welded to the heat exchange tube by using a welding material.
A method of manufacturing a heat exchanger according to claim 11, wherein:

The welding material is formed as a ring member, and is disposed between the heat exchange tube and the fin hole flange of the fin body to weld the fin hole of the fin body to the heat exchange tube by heating together.
A method of manufacturing a heat exchanger according to claim 11, wherein:

Step of assembling the heat exchange tube and the fin by placing the heat exchange tube into the fin hole In the step, a ring member is placed between the heat transfer tube and the annular fin hole flange of the fin body, and both the inner side surface and the outer side surface of the ring member are provided with a welded composite layer as a welding material.
A method of manufacturing a heat exchanger according to claim 11, wherein:

The size of the fin hole flange of the front fin body is smaller than the size of the heat exchange tube, so that the fin hole flange of the fin main body forms an interference fit with the heat exchange tube.
A method of manufacturing a heat exchanger according to claim 11, wherein:

The heat transfer tube is pre-coated with solder paste by placing the heat exchange tube into the fin hole to assemble the heat exchange tube and the fin.
A method of manufacturing a heat exchanger according to claim 11, wherein:

The heat exchange tube is a round tube and has a diameter of less than 7 mm.
A method of manufacturing a heat exchanger according to claim 12 or 13, wherein:

The outer surface of the ring member is a tapered surface, and the inner surface of the fin hole of the fin body is a tapered surface.
A method of manufacturing a heat exchanger according to claim 14, wherein:

Before the step of assembling the heat exchange tubes and the fins by placing the heat exchange tubes into the fin holes, the inner surface of the fin hole flanges or the outer surface of the heat exchange tubes is provided with a welded composite layer as a welding material.