KR100647717B1 - Header tank of radiator made by aluminum - Google Patents

Abstract

The present invention relates to a header tank of an aluminum radiator, which aims to provide a header tank of an aluminum radiator that is excellent in the strength of the joint between the header and the tank, the brazing property and the liquid-tightness, and also the radiator productivity is excellent.

The header tank of the aluminum radiator of the present invention, the insertion slits 112 into which the ends of the heat exchange tubes 3 are inserted extend upward from the bottom portion 111 and the edge of the bottom portion formed at predetermined intervals along the longitudinal direction. A header 11 having a header skirt portion 113 and a tank 13 having a ceiling 131 and a tank skirt portion 133 extending downward from the edge of the ceiling and joined to the header skirt portion; Is done. The header is opened by a connecting rib 15 whose upper end is opened so that the end of the tank skirt 133 is inserted into and joined to the outer side of the header skirt 113. It is formed integrally with the skirt portion 113. The tank skirt portion 133 is recessed to form a support rail 136 in close contact with the upper surface of the connecting rib 15 from the outside of the tank skirt portion 133.

Heat exchanger, radiator, radiator, condenser, heater core, header, tank, header tank

Description

Header tank of radiator made of aluminum {HEADER TANK OF RADIATOR MADE BY ALUMINUM}

1 is a front view showing an example of a radiator to which a header tank according to Embodiment 1 of the present invention is applied.

2 is an exploded perspective view showing a state in which the header tank is assembled.

3 is a partially enlarged cross-sectional view showing a state in which the header tank is assembled and joined.

4 is a partially enlarged sectional view showing a state in which a mounting bracket is installed as an example of use of the header tank.

5 is a partially enlarged cross-sectional view showing a state in which the header tank according to the second embodiment of the present invention is assembled and joined.

6 is a partially enlarged cross-sectional view showing a state in which the header tank according to the third embodiment of the present invention is assembled and joined.

7 is a perspective view showing a conventional general radiator.

8 is a view showing a state in which a header tank constituting a conventional general radiator is assembled.

9 is a view for explaining a problem appearing in the process of bonding the header tank constituting a conventional general radiator.

10 is a partially cut-away perspective view showing a state in which a header tank of another conventional radiator is joined.

11 is a partially exploded perspective view showing a state in which a header tank of another conventional radiator is joined.

<Explanation of symbols for main parts of the drawings>

1: header tank, 3: heat exchange tube,

11: header, 13: tank,

15: connecting rib, 16: insertion rail,

17: angle type coupling rib, 111: bottom portion,

112: insertion slit, 113: header skirt portion,

131: ceiling, 133: tank skirt,

136: support rail, 171: insertion hole

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a header tank of an aluminum radiator, and more particularly, to a header tank of an aluminum radiator that is excellent in the strength of the joint between the header and the tank, the brazing property, and the liquid-tightness, and also excellent in the productivity of the radiator.

An aluminum radiator having a header tank in which a header and a tank are joined to each other typically includes two header tanks 7 and 7 arranged side by side at predetermined intervals, respectively, as shown in FIG. Multiple heat exchange tubes (73) for distributing heat exchange media between two header tanks (7,7) by placing a plurality of parallel arrangements at predetermined intervals between the tanks (7,7) to interconnect the header tanks (7). And a plurality of heat transfer fins 74 stacked between the heat exchange tubes 73 to form a radiator core 70 together with the heat exchange tubes 73. Both sides of the writer core 70 are each reinforced by a support plate 75. Although not shown, either the header tank 7 or the two header tanks 7, 7 are provided with inlets and outlets of the heat exchange medium. Each aluminum part constituting such a radiator is typically formed of a brazing sheet formed by coating a surface with a brazing material having a lower melting point than that of aluminum (ie, a base material), and these aluminum parts are sequentially assembled by a jig and then assembled. Heating the radiator assembly in a furnace such as a vacuum furnace to a temperature between the melting point of aluminum and the melting point of the brazing material, the molten brazing material diffuses and flows toward the parts in contact with the aluminum parts, thereby joining the aluminum parts together. Radiators are manufactured. In the header 71 constituting the header tank 7 of the aluminum radiator, insertion slits (not shown) into which the end of the heat exchange tube 73 is inserted are generally spaced apart at predetermined intervals (ie, heat transfer fins). A bottom portion 711 formed at a distance that can be inserted between the heat exchange tubes 73, and a header skirt portion 712 extending upward from the edge of the bottom portion 711, and the header 71. ), The header skirt portion 712 extends upward from both long sides of the bottom portion 711. The tank 72 coupled to the header 71 to form the header tank 7 extends downward from the edge of the ceiling 721 and the ceiling 721 to be joined to the header skirt 712. The tank skirt 722 extends downwards from both long sides of the ceiling 721 when the tank 72 is extruded.

In the aluminum radiator as described above, since the header 71 and the tank 72 are joined to each other by brazing to form the header tank 7, the assembly and brazing of the header 71 and the tank 72 is performed. And the leaktightness of the joint is most important, but in the conventional general aluminum radiator, as shown in FIG. 8, the header (the header of the tank skirt 722 is in contact with the inside of the end of the header skirt 712). It is difficult to accurately assemble the header 71 and the tank 72 because it is inserted into the blade 71 and brazed. Therefore, as a separate jig for assembling the header 71 and the tank 72 causes an increase in assembly labor and an increase in manufacturing cost. In addition, since the tank 72 may be inclined with respect to the header 71 as shown in FIG. 9 due to the influence of the fluidized bed of the brazing material or the like during brazing, a large amount of brazing failure occurs. In addition, when the brazing failure occurs, the joint between the header 71 and the tank 72 is weak in strength, and there is a possibility that the heat exchange medium leaks from the joint due to cracks or the like.

In consideration of these problems, techniques for increasing the strength of the header tank and increasing the productivity have been proposed. Representative of such prior arts is the header tank for aluminum radiators of Japanese Patent Application Laid-Open No. 6-22785. In this prior art, as shown in FIG. 10, the engaging pieces 821 are formed at predetermined intervals along the longitudinal direction at the opening end of the tank 82, and the engaging pieces 821 are plate-shaped headers 81. As shown in FIG. A technique is disclosed in which the header tank 80 can be formed by joining the header 81 and the tank 82 by brazing in a state in which the header 81 and the tank 82 are joined by bending toward the bottom of the bottom surface. Reference numeral 83 is a heat exchange tube. In addition, Japanese Unexamined Patent Application Publication No. 6-22786, as shown in Fig. 11, is formed on both sides of the tank 92, the rail 921 is formed in which both long sides of the header 91 can be slidingly coupled to the header 91 And a technique in which the header tank 90 can be formed by joining the header 91 and the tank 92 by brazing in a state in which the tank 92 is coupled to each other. Reference numeral 93 is a heat exchange tube, 94 is an end cap for closing the opening of the header tank 90.

However, in the above-described two prior arts, both the long sides of the tank surround both ends of the header so that the header and the tank can be coupled and bonded to each other, so that the header and the tank cannot be precisely coupled to each other. That is, when the header is coupled to both long sides of the tank, both long sides of the tank are subjected to external force from the inside to the outside, so that the deformation of the tank is easy to occur, and both the long sides of the tank combined with the header are lifted from the header and the header and the tank. Contact is not made uniformly. If the brazing is performed in this state, the bonding quality of the brazing joint is inevitably deteriorated, so that the bonding strength between the header and the tank is not very good. That is, the problem in the conventional general radiator cannot be completely solved.

The present invention has been made in consideration of the above-described conventional problems, and relates to a header tank of an aluminum radiator having excellent joint strength, brazing and liquid tightness between the header and the tank, and excellent productivity of the radiator.

In order to achieve the above object, the present invention provides a header having a bottom portion in which insertion slits into which end portions of heat exchange tubes are inserted are formed at predetermined intervals along a length direction, and a header skirt portion extending upward from an edge of the bottom portion, and a ceiling portion and A header tank of an aluminum radiator comprising a tank having a tank skirt portion extending downward from an edge of the ceiling and joined to the header skirt portion, the insertion rail having an upper portion open to insert and join the end portion of the tank skirt portion. An outer portion of the header skirt portion, integrally formed with the header skirt portion by connecting ribs extending outward from the upper end thereof; The tank skirt portion is characterized in that the support rail which is in close contact with the upper surface of the connecting ribs is recessed inward from the outside of the tank skirt portion.

According to this header tank, not only the inner and outer surfaces of the tank skirt portion are joined to both inner surfaces of the insertion rail, but also one side of the support rail of the tank skirt portion is joined to the upper surface of the connecting rib so that the brazing joint area is increased. The bonding strength of can be improved.

In addition, according to the present invention, the free end of the insertion rail can be further extended to be bent and inserted into the support rail to be joined. In the case of the header tank, the brazing joint area is further increased because the free end bend of the insertion rail is joined to the support rail, and the bond strength of the brazing joint is further increased because the free end bend of the insertion rail grips the tank skirt. Can be improved.

Further, the present invention provides a header having a bottom portion in which insertion slits into which an end portion of a heat exchange tube is inserted are formed at predetermined intervals along a length direction, and a header skirt portion extending upward from an edge of the bottom portion, and from an edge of a ceiling and the ceiling portion. A header tank of an aluminum radiator comprising a tank having a tank skirt portion extending downward and joined to the header skirt portion, wherein the angle type coupling rib is formed by a connecting rib extending outward from an upper end of the header skirt portion. Integrally formed with the header skirt; An insertion hole is formed in the angle coupling rib in a longitudinal direction thereof such that a lower end of the tank skirt is inserted and joined; The tank skirt portion is characterized in that the support rail which is in close contact with the upper surface of the connecting ribs is recessed inward from the outside of the tank skirt portion.

Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings.

<Example 1>

The header tank of the aluminum radiator which concerns on Example 1 of this invention is demonstrated, referring FIGS.

1 shows an example of a radiator to which a header tank according to the present invention is applied. The radiator illustrated includes two header tanks (1,1) made according to Embodiment 1 of the present invention and arranged side by side at predetermined intervals, respectively; A plurality of heat exchangers are arranged in parallel at a predetermined interval between the two header tanks (1,1) to circulate the heat exchange medium between the two header tanks (1,1) by mutually communicating the header tanks (1) A tube 3; In addition, a plurality of heat transfer fins 4 are laminated between the heat exchange tubes 3 to form a radiator core 2 together with the heat exchange tubes 3. Both sides of the radiator core 2 are each reinforced by the support plate 5, and the illustration of the inlet and outlet of the heat exchange medium is omitted here.

The header 11 constituting the header tank 1 according to the first embodiment (here, only the upper header tank 1 will be described since the structures of the upper and lower header tanks 1 and 1 are the same), the heat exchange tube ( Insertion slits 112 into which the ends of 3) are inserted have a bottom portion 111 formed at predetermined intervals along the length direction, and a header skirt portion 113 extending upward from an edge of the bottom portion 111 ( For the extrusion of the header 11, it is preferable that the header skirt portion 113 extends upward from both long sides of the bottom portion 111). In addition, the tank 13, which is joined to the header 11 to form the header tank 1, extends downward from the edge of the ceiling 131 and the ceiling 131 to be joined to the header skirt portion 113. It has the tank skirt part 133 (In the case of the tank 13, it is preferable for the extrusion molding to extend the tank skirt part 133 downward from both long sides of the ceiling part 131).

According to the first embodiment, the joint structure of the tank skirt portion 133 and the header skirt portion 113 is as follows. That is, the insertion rail 16 is integrally formed with the header skirt portion 113 by the connecting rib 15 extending outward from the upper end of the header skirt portion 113. The insertion rail 16 is open so that the lower end of the tank skirt portion 133 can be properly inserted.

Therefore, when the lower end portion of the tank skirt portion 133 is inserted into the insertion rail 16, the tank 13 is arranged in the header 11 because the outermost bent portion of the insertion rail 16 supports the outer surface of the tank skirt portion 133. There is no need to assemble the header 11 and the tank 13 using a jig separately because it is not lifted or released. If the brazing is performed with the lower end of the tank skirt 133 inserted into the insertion rail 16, the inner and outer surfaces of the tank skirt 133 are joined to both inner sides of the insertion rail 16. Excellent aging bond strength.

Meanwhile, according to the first embodiment, in order to further increase the brazing property and the bonding strength between the tank 13 and the header 11, the tank skirt 133 is in close contact with the upper surface of the connecting rib 15. The support rails 136 to be joined are recessed inward from the outside of the tank skirt 133. Therefore, when the tank 13 is coupled to the header 11, the inner and outer surfaces of the tank skirt portion 133 not only make surface contact with both inner surfaces of the insertion rail 16, but also the support rail 136 of the tank skirt portion 133. Since one side (i.e., the lower surface of the support rail 136) is in surface contact with the upper surface of the connecting rib 15, the contact area between the header 11 and the tank 13 is increased, and thus the brazing property and Bonding strength of the brazing joint can be further increased.

In Example 1, when the header 11 and the tank 13 are manufactured by extrusion molding and joined together to form the header tank 1, the header tank 1 is open at both ends in the form of a pipe, so that FIG. As shown, both openings of the header tank 1 can be blocked by an end cap 14 that is properly inserted and brazed to the opening.

In addition, according to Embodiment 1, as shown in FIG. 4, a mounting bracket 6 is mounted on the support rail 136 for mounting the radiator to the vehicle body or for mounting other components such as a fan shroud assembly to the radiator. It is convenient because it can be combined easily.

<Example 2>

The header tank of the aluminum radiator which concerns on FIG. 5 with reference to FIG. 5 is demonstrated.

In the header tank 1 according to the second embodiment, the free end of the insertion rail 16 further extends upward in the above-described first embodiment, and is bent and inserted into the support rail 136 formed in the tank skirt 133. Except for being bonded, the rest of the configuration and operation are the same as in Example 1.

When the free end of the insertion rail 16 is bent and inserted into the support rail 136, the contact area between the header 11 and the tank 13 increases by that much, and the header 11 in the state in which the contact area is increased in this way. In the case of brazing bonding the tank 13 with the brazing property, the bonding strength of the brazing joint may be further improved. Furthermore, since the free end bent portion 161 of the insertion rail 16 is bent into the support rail 136 to be gripped by the tank skirt portion 133, when the tank 13 is assembled to the header 11, The use of the jig can be further excluded.                     

<Example 3>

6, the header tank of the aluminum radiator which concerns on Example 3 of this invention is demonstrated.

In the header tank 1 according to the third embodiment, the rest of the configuration and operation are different from the above-described embodiments except that the header 11 is somewhat different from the header 11 in the above-described embodiments. same.

That is, the header 11 constituting the header tank 1 according to the third embodiment has a connecting rib extending outward from the upper end to the outside of the header skirt 113 extending upward from the edge of the bottom 111 ( An angle coupling rib 17 is integrally formed with the header skirt portion 113 by 15). In addition, an insertion hole 171 is formed in the longitudinal coupling rib 17 in the longitudinal direction thereof so that the lower end of the tank skirt 133 may be inserted and joined. Therefore, when the tank 13 is coupled to the header 11, the lower end of the tank skirt portion 133 is inserted into the insertion hole 171 of the header 11, so that the tank skirt portion 133 receives the force from the inside to the outside. Not only does it deform, but also the tank 13 does not escape from the header 11. In addition, the insertion length of the tank skirt portion 133 with respect to the insertion hole 171 is limited because the bottom surface of the support rail 136 is in contact with the upper surface of the connecting rib 15 so that the tank 13 is uniform in the header 11. Can be combined to one height.

In addition, according to the third embodiment, when assembling the tank 13 to the header 11, the lower end of the tank skirt 133 inserted into the insertion hole 171 and protruding below the insertion hole 171 is separated upward. In order to prevent the lower end of the tank skirt portion 133 is preferably bent to the bottom of the angle-type coupling rib 17.

In the header tank of the aluminum radiator according to the present invention configured as described above, when the tank 13 is coupled to the header 11 to constitute the header tank 1, the use of a separate jig can be excluded. In addition to excellent properties, it is possible to reduce the number of assembly operations, thereby improving the productivity of the radiator.

In addition, as the contact area between the header 11 and the tank 13 increases, the brazing property and the bonding strength of the brazing joint are excellent, so the radiator is excellent in durability and the leakage of the heat exchange medium can be prevented, thereby improving the quality of the radiator. It can increase.

In addition, it is convenient to mount the mounting bracket 6 to the support rail 136 for mounting the radiator to the vehicle body or for mounting other components such as a fan shroud assembly to the radiator.

Claims (4)

The header 11 having a bottom portion 111 formed at predetermined intervals along the longitudinal direction of the insertion slits 112 into which the end of the heat exchange tube 3 is inserted, and a header skirt portion 113 extending upward from the edge of the bottom portion. ), A tank 13 having a ceiling 131 and a tank skirt 133 extending downward from the edge of the ceiling and joined to the header skirt, and an end cap 14 blocking both openings. In the header tank of the aluminum radiator made of, The header is opened by a connecting rib 15 whose upper end is opened so that the end of the tank skirt 133 is inserted into and joined to the outer side of the header skirt 113. Integrally formed with the skirt portion 113; The tank skirt 133 of the aluminum radiator, characterized in that the support rail 136 in close contact with the upper surface of the connecting rib 15 is formed in the concave inward from the outside of the tank skirt 133. Heather tank. The method of claim 1, The free end of the insertion rail (16) further extends upwardly, the header tank of the aluminum radiator, characterized in that the bending is inserted into the support rail (136) and joined. The header 11 having a bottom portion 111 formed at predetermined intervals along the longitudinal direction of the insertion slits 112 into which the end of the heat exchange tube 3 is inserted, and a header skirt portion 113 extending upward from the edge of the bottom portion. ), A tank 13 having a ceiling 131 and a tank skirt 133 extending downward from the edge of the ceiling and joined to the header skirt, and an end cap 14 blocking both openings. In the header tank of the aluminum radiator made of, An angled coupling rib 17 is integrally formed with the header skirt portion 113 by a connecting rib 15 extending outward from an upper end of the header skirt portion 113; An insertion hole 171 is formed along the longitudinal direction of the angle coupling rib 17 so that the lower end of the tank skirt 133 is inserted and joined; The tank skirt 133 of the aluminum radiator, characterized in that the support rail 136 in close contact with the upper surface of the connecting rib 15 is formed in the concave inward from the outside of the tank skirt 133. Heather tank. The method of claim 3, wherein The lower end of the tank skirt portion 133 inserted into the insertion hole 171 of the angle coupling rib 17 and protrudes below is bent and joined to the bottom surface of the angle coupling rib 17 and made of aluminum. The header tank of the radiator.

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