KR100609721B1 - Heat exchanger having the structure for keeping up the fixed position of parts and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a heat exchanger used in an air conditioner of a vehicle, comprising: a tube having a hollow portion serving as a passage of a heat exchange medium; A first header and a second header formed with insertion holes into which both ends of the tube can be coupled; A support for supporting the first header and the second header; And a coupling means for coupling the first header and the second header to the support, wherein the coupling means comprises: a guide tool protruding from the support; And a header tab formed on the first header and the second header and having a plurality of header tabs interposed therebetween.

Description

Heat exchanger having the structure for keeping up the fixed position of parts and method for manufacturing the same

1 is a perspective view of the tank separated from the conventional heat exchanger,

2 is a perspective view showing the tank separated from the heat exchanger according to the present invention.

3A is a perspective view in which a header is separated by enlarging part A of FIG. 2;

FIG. 3B is a partial cross-sectional view taken along line II-II of FIG. 3A.

<Brief description of symbols for the main parts of the drawings>

10. Heater Core 13. Tube

15. Heat dissipation 휜 17a, 17b. support

17a '. Guide

19a, 19b. Header 19a ', 19b'. Header tab

The present invention relates to a heat exchanger, and more particularly, to a coupling structure of a supporter and a header in a heat exchanger used in an air conditioner of a vehicle.

The heat exchanger is a device that heat exchanges with the outside by providing a passage through which a heat exchange medium can flow. In such a heat exchanger, in particular, a heat exchanger used in an air conditioner of an automobile is a fin tube type, serpentine type, or drone cup type (drawn according to the type of refrigerant and the shape of the heat exchanger). Cup type), parallel flow type, etc. can be classified into applications, such as evaporator, condenser, radiator, and heater core.

In the manufacture of the heat exchanger used in the air conditioner of such a vehicle, each member is made of a material which is easy to heat exchange such as aluminum, and these members are processed into respective shapes and assembled into the heat exchanger. At this time, as will be described later, each member is brazed (braze) bonding, for this purpose is to use a clad (clad) disc. Here, the "clad disc" refers to two kinds of plates having different melting points, that is, the material forming the outer part of the processed product, and the aluminum having the high melting point and the aluminum having the low melting point as the bonding material for brazing. It is formed by the sheet of sheet.

 The assembled heat exchanger is then brazed to each member in the brazing furnace by a brazing process. Here, the "braze bonding" refers to self-bonding only the material of the bonding portion while maintaining the temperature of the portion forming the appearance by maintaining the temperature of the brazing furnace so that only the material of the bonding portion is welded.

However, in order to obtain good braze bonding, it is important to precisely align the workpiece and maintain the alignment before performing the brazing process. Hereinafter, the heater core of the heat exchanger used in the air conditioner of the automobile will be described as an example. Here, the "heater core" is a kind of heat exchanger that heats air introduced by an external blower or the like, and then discharges it into the interior of a vehicle to perform indoor heating.

1 is a perspective view showing a tank separated from the conventional heater core.

Referring to FIG. 1, the heater core 100 is combined with the first and second headers 119a and 119b and the first and second headers 119a and 119b spaced apart from each other by a predetermined distance. Interposed between the tanks 121a and 121b to which the gas can flow in and out, the tube 113 through which the heat exchange medium is circulated by being coupled to the first and second headers 119a and 119b, and interposed between the tubes 113. A heat radiation fan 115 is provided. In addition, the upper tank 121a is provided with an inlet pipe 223a for supplying a heat exchange medium and an outlet pipe 223b for discharging it, and the first and second headers 119a and 119b support 117a and 117b. ) At this time, both ends of the support (117a, 117b) has a structure such that the edges of both sides of the end portion is bent "b" to become the supporting portion (117a ') of the first header (119a). In addition, one header tab 119a 'and 119b' is formed at both sides of the first and second headers 119a and 119b, respectively, and the support tabs 117a, 117b are combined with each other.

However, in the conventional heater core 100 as described above, when braze bonding in the brazing process, as the cladding layer of the braze joint is melted or softened, gaps are generated, such gaps, external impacts or individual components. Each member is accompanied by a disturbance of alignment due to the interaction of self weight and the like. In addition, the heat dissipation fin 115 has a shape protruding to the outside before assembling the header. When the first and second headers 119a and 119b are assembled in close contact with each other from the top and the bottom, the first and second headers are assembled. The heat dissipation fins 115 are inserted between the 119a and 119b and the header support portion 117a '. In such a case, not only the parts are not aligned correctly, but also the interference between the header and the support is caused by the heat dissipation fan 115, so that the braze is not easily joined and the sag of the header and the support is large after brazing. .

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchanger and a method of manufacturing the same by minimizing the failure rate by maintaining the exact position of each component.

In order to achieve the above object, a heat exchanger according to an embodiment of the present invention includes a tube having a hollow portion serving as a passage of a heat exchange medium; A first header and a second header formed with insertion holes into which both ends of the tube can be coupled; A support for supporting the first header and the second header; And a coupling means for coupling the first header and the second header to the support, wherein the coupling means comprises: a guide tool protruding from the support; And a header tab formed on the first header and the second header, the header tab being disposed in plural through the guide tool. Here, the end of the support is in contact with the bending surface of the header tab. In addition, the header tab is two, and the guide mechanism provides a heat exchanger formed at both ends of the support.

According to another embodiment of the present invention, a method of manufacturing a heat exchanger includes

Forming at least two header tabs spaced at predetermined intervals on each of the left and right sides of the first and second headers having a plurality of insertion holes, and guide holes supported by the header tabs at a predetermined shape of the support;

Mounting the support such that a heat dissipation tube is interposed between a plurality of tubes having a hollow portion through which a heat exchange medium passes, and the guide tool is supported on the header tabs at left and right sides thereof;

Inserting and assembling an upper tank and a lower tank of a predetermined shape into the first header and the second header; And

Guide brackets of the support are caught by the header tabs to provide brazing bonding in a state where the mounting position of the support relative to the header is fixed.

Hereinafter, a heat exchanger according to the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

2 is a perspective view of the upper and lower tanks separated from the heater core as an embodiment according to the present invention.

Referring to FIG. 2, the heater core 10 includes a heat radiation fin 15 for increasing a heat dissipation area between the tubes 13 in which the hollow portion 13b (see FIG. 3A) is formed as a passage through which a heat exchange medium can pass. The first and second headers 19a and 19b and the tanks 21a and 21b are coupled thereto in a state where the supports 17a and 17b are disposed on the left and right sides thereof. Here, the tanks 21a and 21b have an inlet 21a 'through which a heat exchange medium can be introduced, and an outlet 21b' through which heat exchange medium can flow out after heat exchange with air introduced by a blower (not shown). Is attached. The first header 19a is provided with a baffle 23 for restricting the flow of the heat exchange medium between the inlet and the outlet of the heat exchange medium.

3A is a perspective view of the header separated from the portion A of FIG.

Referring to FIG. 3A, a plurality of insertion holes 29 are formed in the first header 19a at predetermined intervals so that the upper end portion 13a of the tube 13 may be inserted and coupled thereto. In addition, two header tabs 19a 'are formed on both sides of the first header 19a at predetermined intervals, and the header tab 19a' is guided at the center of the support 17a and the header tab 19a is provided. Guide sphere 17a 'is formed in contact with the side of') to prevent misalignment.

Referring to FIG. 2, like the first header 19a of FIG. 3A, an insertion hole is formed in the second header 19b of the lower part so that the lower end portion of the tube 13 may be inserted and coupled thereto. In addition, the header tab 19b 'is formed in the second header 19b in the same shape as the first header 19a. Accordingly, the upper end and the lower end of the tube 13 are fitted into the insertion holes 29 of the first and second headers 19a and 19b (see FIG. 3B), and the tube 13 having the heat dissipation fins 15 interposed therebetween. ) Are assembled to align with the first and second headers 19a, 19b. The two header tabs 19a'19b 'formed on the left and right sides of the first and second headers 19a, 19b are guided and assembled by guides formed on the supports 17a, 17b'. After that, an external pressure is applied by a dedicated mechanism, and the first and second headers 19a and 19b and the left and right supports 17a and 17b are fixed and assembled to each other. At this time, since the header tabs 19a 'and 19b' are fitted in the upper and lower portions with the support holes 17a 'of the support interposed therebetween, the supports 17a and 17b and the first and second headers 19a and 19b are provided. ) Can be assembled and assembled correctly. The guide tool may have a shape that protrudes only at both upper and lower ends of the support 17a and 17b within a range of guiding and contacting the header tabs 19a 'and 19b' to prevent misalignment. have.

FIG. 3B is a sectional view taken along the line II-II of FIG. 3A.

2 and 3B, the upper portion of the support 17a is brought into contact with the bent surface 25a of the header tab 19a 'for a more accurate alignment. Here, the "bend face" means a first protrusion 25 in which the header tab extends from the header, and a second protrusion 26 bent in a "c" shape in the first protrusion 25, for example. ) Means the portion of the first protrusion that is in contact with the support. Similarly, the lower portion of the support 17a is also in contact with the bent surface (not shown) of the header tab 19b '. That is, the lengths of the supports 17a and 17b are adjusted to be at least the interval between the bent surfaces of the header tabs 19a 'and 19b' after assembly. In this case, both ends of the supports 17a and 17b are header tabs ( 19a ', 19b'), and are fixed while being in contact with each other. In this way, by adjusting the supports 17a and 17b to a closer contact length, the support and the header can be more precisely aligned, and the alignment state can be more accurately maintained even in the post brazing process.

The upper tank 21a is inserted into the first header 19a and assembled, and the lower tank 21b shown in FIG. 1 is inserted into the second header 19b and assembled.

As an embodiment according to the present invention assembled as described above, each member in the brazing furnace (not shown) by the brazing process is precisely brazed bonding.

Although the above has been described as a heater core as an example, the present invention is not limited thereto, and according to the present invention can be used without limitation for a heat exchanger having a structure in which the alignment of each component can be maintained accurately, and thus, the present invention The technical protection scope of shall be determined according to the matter described in the claims.

As described above, according to the heat exchanger having a support and the header according to the present invention and a manufacturing method thereof, the following effects are generated.

In the first / second header into which the tube is inserted, two header tabs can be guided and inserted into the guide holes of the support, respectively, on the left and right sides thereof, so that the heat exchanger is assembled more stably and accurately. In addition, by setting the length of the support between the bent surfaces of the assembled header tabs, the support is more stably assembled with the header tabs. In the case of brazing a heat exchanger using a support and a header according to the present invention in a brazing furnace having a high temperature of 600 ° C. or higher, even if a cladding layer of the braze joint of each part is melted and softened or a gap occurs, the alignment state Can be maintained stably and accurately, so that the sag failure of the support and the header does not occur even after braze bonding. In addition, since the alignment and maintenance in the exact alignment state, it is easy to realize the full automation, the failure rate is reduced.

Claims (6)

A tube having a hollow portion serving as a passage of the heat exchange medium; A first header and a second header formed with insertion holes into which both ends of the tube can be coupled; A support for supporting the first header and the second header; A heat exchanger comprising: a coupling means for coupling the first header and the second header with the support, The coupling means is: A guide tool protruding from the support; And a plurality of header tabs formed on the first header and the second header, the header tabs being disposed in plural with the guide tool therebetween. The method of claim 1, An end of the support is in contact with a bending surface of the header tab. The method according to claim 1 or 2, And the header tab has two heat exchangers. The method of claim 3, The guide sphere is formed on both ends of the support heat exchanger. The method of claim 3, The support is a heat exchanger, characterized in that two are installed opposite each other. Forming at least two header tabs spaced at predetermined intervals on each of the left and right sides of the first and second headers having a plurality of insertion holes, and guide holes supported by the header tabs at a predetermined shape of the support; Mounting the support such that a heat dissipation tube is interposed between a plurality of tubes having a hollow portion through which a heat exchange medium passes, and the guide tool is supported on the header tabs at left and right sides thereof; Inserting and assembling an upper tank and a lower tank of a predetermined shape into the first header and the second header; And And braze-joining the guide tool of the support to the header tab while the mounting position of the support is fixed with respect to the first and second headers.

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