KR101564271B1 - The heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger.

The heat exchanger of the present invention includes: a header tank positioned corresponding to the upper, lower, left, and right sides of the heat exchanger and flowing the heat exchange medium; a plurality of tubes each having an end connected to the header tank and through which the heat exchange medium flows, The header tank is formed with a tube insertion hole into which a tube is inserted and connected, and a protrusion is formed so as to increase a joining surface with the inserted tube. The heat exchanger includes a plurality of fins, Clad sheet; And a heat exchange medium flowing space formed in the heat exchange medium, the heat exchange medium being connected to the clad sheet and not exposed to the outside, the heat exchange medium being flowed into the tube connected to the clad sheet, wherein the projections of the clad sheet and the tubes inserted into the clad sheet A protrusion insertion groove and a tube insertion groove to be inserted are formed, and the protrusion insertion groove and the tube insertion groove consist of a header pipe for supporting the tube inserted into the clad sheet.

The header tank provided in the heat exchanger of the present invention has a structure including a header pipe and a clad sheet. Since the clad sheet into which the tube is inserted is provided with a protrusion capable of increasing the bonding surface with the tube, the header tank can be made compact, lightweight, Is excellent.

Heat exchanger, Clad sheet, Header pipe, Withstand pressure, Header tank

Description

{HEAT EXCHANGER}

The present invention relates to a heat exchanger comprising a header tank, a tube, and a fin.

Various heat exchangers are used for the purpose of reusing heat energy or for using the temperature lower or higher according to the application, and various heat exchangers are also provided in automobiles.

In the automobile industry, the compact and lightweight design of various components leads to the improvement of the fuel efficiency, and it enables the design of the body that can meet the needs of the consumers. It is being studied.

In the field of automotive air conditioning systems, which have difficulty in securing space in the engine room, researches for miniaturization and light weight have been continuing, and as a result, heat exchanging tubes, which are components of automotive air conditioning systems, are being pursued to be compact, lightweight, highly efficient and highly functional .

Although there are various types of heat exchangers, plate heat exchangers and tubular heat exchangers are mainly used.

Most of the plate heat exchangers are formed by stacking a plurality of plates so that a first medium flow space and a second medium flow space are formed with a plate therebetween, a first heat exchange medium passes through a first medium flow space, 2 medium flow space and heat exchange is performed between the first heat exchange medium and the second heat exchange medium.

As shown in FIG. 1, the tube-type heat exchanger has a header tank 100 at upper and lower ends, left and right sides, and a plurality of tubes 200 therebetween to circulate the heat exchange medium. 300, and the flow of the heat exchange medium in the inside thereof is basically as follows.

First, when a heat exchange medium is introduced into one header tank, the heat exchange medium flows along a plurality of thin tubes opened to one side of the header tank.

Since the tube has a very thin flat tube shape and is usually made of a metal material, the heat exchange medium flowing through the tube can achieve very smooth heat exchange with the outside.

Further, in order to facilitate such heat exchange, a fin is provided between the tubes to widen the heat transfer area.

The heat exchange medium flowing through the tube flows into the other header tank.

FIG. 1 shows a very simple structure in which only one header tank is provided on the left and right in order to show the flow of a simple heat exchange medium.

The heat exchange medium corresponds to a liquid or a gas, and freon gas has been mainly used when it serves as a refrigerant for an automotive cooling system.

This is because the freon gas is chemically stable, non-explosive and nonflammable, non-toxic refrigerant.

However, when the chlorofluorocarbon gas is released into the atmosphere, it is not destroyed and reaches the stratosphere. In the stratosphere, chlorine atoms are decomposed by the ultraviolet rays of the sun to block the ultraviolet rays that enter the earth, which eventually destroys the ozone layer. Was.

This led to the adoption of the Montreal Protocol in 1987, which agreed to regulate the production and consumption of Freon and gradually replace it with other refrigerants. The refrigerant used in place of Freon is less harmful, has higher extrusion efficiency, Carbon dioxide having excellent characteristics and excellent volume cooling ability is used as an alternative refrigerant.

However, in order to use carbon dioxide as a refrigerant, a heat exchanger which is resistant to internal pressure is required because high pressure is required.

There has been found a technique of using an extruded material to manufacture a header pipe which is resistant to internal pressure and a method of superimposing a clad sheet to reinforce the medium and the pressure resistance for joining the extruded material and the tube.

However, when the curved portion having a constant inner diameter between the tube insertion holes adjacent to the header pipe is in line contact with the clad sheet, there is a problem that the pressure resistance of the heat exchanger is reduced due to the formation of voids on the left and right sides of the curved portion.

In order to solve such a problem, in order to improve the pressure resistance in a heat exchanger in which a header pipe and a clad sheet are combined as in Korean Patent Application No. 10-2006-0085079, which is selected by the applicant of the present invention, a tube insertion hole of a header pipe is cut And a technique for punching the sheet so that the area between the header pipe and the clad sheet is reduced (see Figs. 2 to 3).

However, the conventional art has a problem in that a portion where the tube is inserted is fragile and a phenomenon that the tube ruptures due to the opening of the tube occurs.

In order to solve such a problem, it is possible to increase the thickness of the material forming the header tank by increasing the thickness of the partition wall of the tube, but in such a case, it is not only small and lightweight, but also raises the manufacturing cost of the heat exchanger.

There is a method of increasing the rigidity of the material in order not to increase the thickness of the materials, but this method also has a limitation in solving the problem and raises the manufacturing cost of the heat exchanger.

As another method, it is possible to apply a technique of changing the channel pitch of the tube as in Japanese Patent Laid-Open No. 2000-266484, but the thickness of the partition wall is increased to increase the channel pitch.

It is an object of the present invention to provide a heat exchanger having a header tank which is small and light in weight and excellent in pressure resistance and does not generate a rupture phenomenon.

Another object of the present invention is to provide an inexpensive heat exchanger by lowering the manufacturing cost of the header tank.

In the present invention, the header tank is implemented in a form having a header pipe and a clad sheet. The clad sheet into which the tube is inserted is formed with a protruding portion capable of increasing the bonding surface with the tube. Make it a tank.

The header pipe is provided with a protrusion insertion groove and a tube insertion groove into which the protrusion of the clad sheet and the tube inserted into the clad sheet are respectively inserted and the tube inserted into the clad sheet is supported by the header pipe so that the pressure resistance is further improved .

The heat exchanger of the present invention has header tanks positioned corresponding to the upper, lower, left, and right sides and to which the heat exchange medium flows.
The header tank 100 includes a tube insertion hole 12 through which the tube 200 is inserted and connected and a predetermined region on both sides of the tube insertion hole in the length direction in contact with the inserted tube 200, A clad sheet 10 formed to include a protruding portion 11 protruding from the clad sheet 10; And a heat exchange medium flow space (30) coupled with the clad sheet (10) and not exposed to the outside, wherein the heat exchange medium flowing into the tube (200) connected to the clad sheet (10) A protrusion insertion groove 21 into which the protrusion 11 of the clad sheet 10 is inserted and a tube insertion groove 22 into which the tube 200 inserted into the clad sheet 10 are inserted are formed, 21 and the tube insertion groove 22 are formed of a header pipe 20 for supporting the tube 200 inserted in the clad sheet 10. [

In addition, each of the header tanks has a plurality of tubes each having an end portion connected thereto and through which a heat exchange medium flows.

Further, it has a plurality of fins interposed between the respective tubes.

The header tank has a clad sheet in which a tube insertion hole is formed through which a tube is inserted and connected, and a protruding portion is formed so as to increase a joining surface with the inserted tube.

In addition, a header pipe is formed to form a heat exchange medium flow space coupled with the clad sheet and not exposed to the outside, and to allow the heat exchange medium to flow into the tube connected to the clad sheet.

The header pipe is formed with a protrusion insertion groove and a tube insertion groove into which the protrusion of the clad sheet and the tube inserted into the clad sheet respectively are inserted and the protrusion insertion groove and the tube insertion groove support the tube inserted into the clad sheet .

The protrusions 11 of the clad sheet may protrude while forming a curvature, and the protrusions may overlap.

The header pipe 20 may be formed to form a plurality of heat exchange medium flow spaces 30 or the clad sheet 10 may have protrusions 11 inserted into the plurality of header pipes 20 .

The header tank provided in the heat exchanger of the present invention has a structure including a header pipe and a clad sheet. Since the clad sheet into which the tube is inserted is provided with a protrusion capable of increasing the bonding surface with the tube, the header tank can be made compact, lightweight, Is excellent.

In addition, when the projecting portion insertion groove and the tube insertion groove into which the projecting portion of the clad sheet and the tube inserted into the clad sheet are respectively inserted are formed in the header pipe and the tube inserted into the clad sheet is supported by the header pipe, Do.

Hereinafter, the technical idea of the present invention will be described in more detail with reference to the accompanying drawings.

It is to be understood, however, that the appended drawings illustrate only typical embodiments of the present invention and are not to be considered as limiting the scope of the invention.

The present invention relates to a heat exchanger having a header tank, a tube, and a fin.

Therefore, the heat exchanger of the present invention has header tank 100 in which the heat exchanger medium is positioned so as to correspond to the upper, lower, left, and right sides.

In addition, the header tank 100 has a plurality of tubes 200 connected at their ends to each other and through which the heat exchange medium flows.

Further, each of the tubes 200 has a plurality of fins 300 interposed therebetween.

However, the present invention has an object to provide a heat exchanger having a solid header tank.

That is, unlike the prior art, it is intended to provide a heat exchanger equipped with a header tank which is small and lightweight and has excellent pressure resistance and does not cause a rupture phenomenon.

Particularly, the object of the present invention is to solve the problem that the tube 2 ruptures at the portion where the tube 2 is inserted and ruptures.

For this purpose, the present invention is embodied in the form of having a clad sheet 10 and a header pipe 20 in implementing a header tank.

However, if the thickness of the material forming the header tank is increased, for example, the thickness of the partition wall of the tube 2 is increased to increase the pressure resistance, there is a problem that the manufacturing cost of the heat exchanger is increased as well as meeting the trend of miniaturization and weight reduction .

The method of increasing the stiffness of the material also has a limitation in increasing the pressure resistance and raises the manufacturing cost of the heat exchanger.

For this reason, in the present invention, a protruding portion 11 capable of increasing the bonding surface with the tube 2 is formed on the clad sheet 10 into which the tube is inserted.

That is, the reason why the header tank is ruptured is varied, but the reason is that the header pipe 20 and the clad sheet 10 are realized as a thin and light material in order to reduce the size and weight.

Particularly, the reason for frequent rupture in the portion where the tube 2 is inserted or the like is because the clad sheet 10 is thin and the bonding surface between the clad sheet 10 and the tube 2 is not large.

Therefore, in the present invention, the protruding portion 11 is formed on the clad sheet 10 so that the bonding surface between the tube 2 and the clad sheet 10 is increased.

The protruding portion 11 is characterized in that the pressure resistance can be improved without increasing the overall thickness of the clad sheet 10.

The protrusions 11 may be embodied in various shapes. The protrusions 11 may be formed as protrusions as shown in FIG. 5, or may be formed by bending a part of the cladding sheet 10 as shown in FIG.

That is, the clad sheet 10 of the present invention can be obtained through molding, but may be obtained by press working such as cutting, vane, or the like.

When the protrusions 11 of the clad sheet 10 are formed in a bent shape, the protrusions 11 may be formed in a superimposed manner as shown in FIG.

On the other hand, a tube insertion hole 12 through which the tube 200 is inserted is connected to the clad sheet 10.

The header pipe 20 as a component of the present invention is formed by forming a heat exchange medium flow space 30 coupled with the clad sheet 10 and not exposed to the outside, 2). ≪ / RTI >

The header pipe 20 may support the tube 2 or the like inserted into the clad sheet 10 to further enhance the pressure resistance of the header tank.

The tube insertion hole 12 into which the tube 2 inserted into the tube insertion hole 12 of the clad sheet 10 is inserted when the closure sheet 10 is combined with the tube insertion groove 12 22).

Since the header pipe 20 supports the tube 2 in the above structure, the connection state of the tube 2 is firm and the pressure resistance can be further improved.

It is possible to secure more excellent pressure resistance by embodying a protrusion insertion groove 21 into which the protrusion 11 formed in the clad sheet 10 is inserted rather than a shape having only the tube insertion groove 22 as described above .

The structure having the projecting portion insertion groove 21 and the tube insertion groove 22 as described above is a structure for more firmly supporting the tube 2 inserted into the clad sheet 10. [

That is, the stress that the inserted tube 2 tries to spread in the axial direction of the header tank can be reduced without any additional member.

Of course, in order to stably support the tube 2 inserted into the clad sheet 10, the protrusion insertion groove 21 and the tube insertion groove 22 may be integrated by a method such as brazing with a tube, .

When the tube insertion hole 12 or the tube insertion groove 22 is integrated with the tube 2 by a method such as brazing or the like, the inserted tube 2 is structured to improve the durability, .

The header pipe (20) of the present invention can be manufactured by a molding method or by press working.

In the structure having the protruding portion insertion groove 21 described above, there is a feature that the manufacturing cost such as the processing cost can be reduced and the time required for the manufacturing can be shortened even if any of the molding method and the press method is used.

In other words, not only can the machining time be shortened by reducing the machining area, but also the consumption of the machining tool by using the machining tool can be reduced and the weight of the header pipe 20 itself can be reduced.

The header pipe 20 of the present invention can be implemented with a structure having a heat exchange medium filling space 40 connected to the heat exchange medium flow space 30 as shown in FIG.

At this time, the heat exchange medium introduced from the outside flows into the heat exchange medium flow space 30 via the heat exchange medium filling space 40 or the heat exchange medium of the heat exchange medium flow space 30 flows through the heat exchange medium filling space 40 Respectively.

The technical idea of the present invention is applicable to various types of header tank structures.

As a concrete example, a plurality of tubes 2 are positioned in the lateral direction of the header pipe 20 among the structures of the header tank.

When the present invention is applied to such a structure, a plurality of tube insertion grooves 22 are formed in the lateral direction of the clad sheet 10 as shown in Fig. 6, and the projections 11 correspond to the respective tube insertion grooves 22 So that it can be applied.

The technical idea of the present invention is also applicable to a case where a plurality of heat exchange medium flow spaces 30 are formed in one header tank.

To this end, the header pipe 20 may be implemented to form a plurality of heat exchange medium flow spaces 30 (see Figure 6).

In a case where a plurality of header pipes 20 are provided in one header tank, one clad sheet 10 may be implemented in a form having protrusions 11 inserted into a plurality of header pipes 20, respectively.

In the present invention, the structure for allowing the heat exchange medium to flow into or out of the header tank can be realized in the same manner as in the prior art.

Also, the structure of the baffle and the end cap can be realized in the same manner as in the prior art.

Since such a structure is already known, a detailed description thereof will be omitted.

1 is a schematic view for explaining a conventional tubular heat exchanger structure;

2 is a schematic view for explaining the structure of a header tank made up of a header pipe and a clad sheet

3 is an exploded perspective view illustrating a conventional header tank structure.

4 is a schematic view for explaining a header tank provided in the heat exchanger of the present invention

A: Cross section of header tank

B: Exploded view of header tank

5 is a schematic cross-sectional view of a header tank for explaining a structure in which protrusions formed in the clad sheet of the present invention are in the form of protrusions

6 is a schematic cross-sectional view for explaining a header tank structure of the present invention in which a plurality of tubes are coupled in a lateral direction

7 is a schematic cross-sectional view for explaining the structure of a header tank having a heat exchange medium flow space and a heat exchange medium fill space

Description of the Related Art

10. Clad sheet 11. Protrusion

12. Tube insertion hole 20. Header pipe

21. Projection insertion groove 22. Tube insertion hole

30. Heat exchange medium flow space 40. Heat exchange medium fill space

100. Header tank 200. Tube

300. Pin

Claims (3)

A plurality of tubes 200 connected to the respective header tanks 100 and to which the heat exchange medium flows, respectively, the header tubes 100 corresponding to the upper, lower, left, and right sides of the header tank 100, And a plurality of fins (300) interposed between the tubes (200), the heat exchanger The header tank (100) A tube insertion hole 12 into which the tube 200 is inserted and a protrusion 11 protruding in a direction in which the tube is inserted in a predetermined region of both sides of the tube insertion hole in a longitudinal direction so as to be in contact with the inserted tube 200 , A clad sheet (10) formed on the substrate (10); And But it is coupled to the cladding sheet 10 to form a heat medium flow is not exposed to the external space 30, and formed so that the flowing heat exchange medium can be introduced into the tube 200 connected to the cladding sheet 10 and cladding A protruding portion insertion groove 21 into which the protrusion 11 of the sheet 10 is inserted and a tube insertion groove 22 into which the tube 200 inserted into the clad sheet 10 are inserted are formed, ) And the tube insertion groove (22) comprise a header pipe (20) for supporting the tube (200) inserted in the clad sheet (10). The method according to claim 1, Characterized in that the protruding portion (11) protrudes while forming a curvature, and the protruding portion is overlapped. 3. The method according to claim 1 or 2, Characterized in that the header pipe (20) forms a plurality of heat exchanging medium flow spaces (30), and the clad sheet (10) has protrusions (11) for inserting into the plurality of header pipes , heat transmitter.

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