JPH02282671A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve an assembling characteristics by a method wherein a first guiding part and a second guiding part located within an opening end into which a tube is inserted and inclined toward an inner side of a first header and a second header are formed and the tube is easily inserted into a header tank while an anti-pressure strength is being kept. CONSTITUTION:A guide part 113 is formed at an opening end 115 of a bottom part 111 and inclined from an outer surface of the bottom part 111 toward an inner side of an insertion hole 112 and further toward an inner surface of the bottom part 111. Since a guide part 13 having a shape of R is formed at an interface between a projection 114 of a bar link and the bottom part 111, a tube 200 can easily be inserted along the guide part 113. Since a connection surface between the tube 200 and an inner wall surface of the projection 114 is relatively long, a brazing operation is improved and a sufficient connecting strength can be assured. Further, since the bottom part 111 of the first header cover 110 and a bottom part 121 of the first header pipe 120 are connected by a brazing, it is possible to assure a large brazing area and further a sufficient pressure proof strength can be assured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a heat exchanger, and is particularly effective for use in a condenser of an automobile air conditioner.

[Conventional technology]

A conventional condenser will be explained based on FIGS. 10 and 11.

In the figure, numeral 10 is a soldering tank, considering pressure resistance,
A round tube is used. The header tank 10 has a compressor (
An introduction pipe 11 through which the refrigerant compressed and discharged (not shown) and at a high temperature and pressure is introduced into the header tank 10.
The soldering is joined. Furthermore, one end of a plurality of flat tubes 20 is connected to the insertion hole 12 formed in the header tank 10 . Fins 30 are joined by brazing between the tubes 20 to improve heat exchange between the air passing between the tubes 20 and the heat exchange fluid flowing inside the tubes 20.

The other end of the tube 20 is connected to an insertion hole (not shown) of a header tank 40. Further, a lead-out vibe 41 for leading out the heat-exchanged refrigerant from inside the header tank 40 is connected to the header tank 40 by brazing.

In the figure, reference numeral 50 is a separator that partitions the inside of each header tank, and is inserted into the insertion hole 12 (header tank 10) formed in each header tank (header tank 40).
The insertion hole is not shown). Therefore, the refrigerant introduced from the introduction pipe 11 snakes inside the tube 20 and reaches the outlet vibe 41.
Derived from

(Problem to be Solved by the Invention) However, since the header tank 10.40 uses an extruded round tube, the insertion hole 12 is usually formed by press punching. The punched shear surface of the punched insertion hole 12 is formed approximately perpendicular to the axis of the header tank.

Here, since the tube 20 and the header tank 10.40 are brazed together, the outer periphery of the insertion end of the tube 20 into the insertion hole 12 is approximately equal to the inner diameter of the insertion hole 12. Therefore, if the tube 20 is displaced, the tube 20 cannot be easily assembled. Therefore, tube 20
When inserting the tube into the insertion hole 12, the tube must be aligned reliably, resulting in poor assembly.

Therefore, it is conceivable to bend the open end of the insertion hole 12 on the outer surface side of the header tank 10.40 toward the inside of the header tank 10.40 to form a guide part for inserting the tube 20, but in the case of press punching Since this is done by inserting a press mold into each header tank, there is a problem that if the opening end of the insertion hole 12 is bent, this bent part becomes an obstacle and the press mold cannot be removed.

It is also possible to chamfer the opening end of the outer surface of the header tank 10.40 of the insertion hole 12 by cutting or the like to form a guide section for tube insertion, but since the wall thickness of each header tank is thin, Cutting that would reduce the compressive strength is not allowed.

Therefore, it is difficult to form a guide portion for inserting the tube 20 at the open end of the insertion hole 12, either by press punching or cutting. Therefore, tube 2
0 cannot be easily inserted into the insertion hole 12,
There was a problem with poor assembly.

An object of the present invention is to improve ease of assembly by easily inserting a tube into a header tank while ensuring pressure resistance.

[Means to solve the problem]

First and second header covers having first and second insertion portions into which tubes are inserted into the first and second hender tanks, and portions of the first and second header covers that face the first and second insertion portions. an open end into which the tubes of the first and second insertion parts are inserted; A technical measure is adopted in which first and second guide portions are formed on the peripheral wall, respectively, and are located inside the opening end and are inclined toward the inside of the first and second header tanks.

It is also effective to form first and second protrusions on the first and second insertion parts that protrude into the first and second header tanks, respectively, and are continuous with the first and second guide parts. It is.

[Action and effect]

A tube is inserted along the first and second guide portions of each opening end circumferential wall of the eleventh second insertion portion. And after being inserted,
The tube is held by the inner wall surfaces of the first and second protrusions.

Therefore, the tube can be properly inserted into each insertion section. In addition, when inserting a tube, the tube can be inserted along the guide section even if the tube deviates from the opening end of the insertion section or the axis of the tube is not parallel to the axis of the insertion section. can be smoothly and reliably inserted into the insertion section.

Therefore, since the tubes can be assembled satisfactorily, workability can be improved.

Further, after the tube is inserted, the tube can be held on the inner wall surface of the protrusion, so that a sufficient length can be secured for brazing the tube.

Therefore, the tube can be reliably joined to the insertion section.

〔Example〕

An embodiment of the heat exchanger of the present invention will be described based on the drawings.

As shown in FIGS. 7 and 8, a first header tank 100 (first header cover 1
10 and a first hender pipe 120. ) is joined by brazing to an inlet pipe 101 for introducing high temperature and high pressure refrigerant compressed and discharged by a compressor (not shown). Further, a discharge pipe 102 is connected by brazing to conduct heat exchange with air and conduct condensed refrigerant toward a liquid receiver (not shown).

In addition, the first header tank 100 has a plurality of flat tubes 20 made of aluminum clad material through which a refrigerant passes.
0 (thickness: about 0.4 mm, width: about 15 to 2.0 strokes)
One end 201 of the two is connected to each other by brazing.

The tube 200 is a perforated extruded tube or a tube into which corrugated fins made of aluminum are inserted. Corrugated fins 300 (thickness: about 0.1 mm) made of aluminum are joined by brazing between each tube 200. The fins 300 can promote heat exchange between the refrigerant passing through the tubes 200 and the air passing between the tubes 300.

The other end 202 of the tube 200 is attached to a second hender tank 400 made of aluminum clamp material.
10 and a second header pipe 420. ) are connected to each other by brazing.

Here, the first soda tank 100 and the second header tank 400 are provided with temporary partitions 500 that divide the insides of the first header tank 100 and the second header tank 400, respectively. This temporary partition 500 allows the first hender tank 1 to be
00 is divided into four parts, and the second hender tank 400 is divided into three parts.

The partition plates 500 (the first header tank 100 will be explained) have a disk shape as shown in FIGS.
The open end 123 of the header pipe 120 is joined by brazing. In addition, the partition plate 5000 circular plate portion 5
02 is inserted into the opening 124 of the first header pipe 120, and the joint is brazed. And each partition plate 50
The inside of the first header tank 100 is divided by joining the two headers facing each other.

Here, since the first header cover 110 and the first hender pipe 120 are assembled after the partition plate 500 is assembled to the open end of the first header pipe 120, the assembly can be easily performed. Further, since the partition plate 500 closes the entire circumference of the open end of the first header vibe, it is possible to reliably prevent refrigerant leakage and divide the header tank.

Next, the first header tank 100 (first header tank 40
0 is the same as the first header tank 100 and will therefore be omitted. ) will be explained in detail.

First, as shown in FIGS. 1 and 2, the first header cover 11O (thickness: about 1.6 mm) is formed by press working, and has a substantially U-shaped cross section. The bottom part 111 has an insertion hole 112 (width: 1.5 to 2.0I11
ff1) is formed.

This insertion hole 112 is connected to the first guide part 113 and the first protrusion part 11.
4. The guide part 113 is the bottom part 11
It is formed at the open end 115 of the bottom part 111 and faces inward of the insertion hole 112 from the outer surface side of the bottom part 111.
slopes toward the inner surface of the And the protrusion 114
protrudes upward in the figure and is formed continuously from the guide portion 113. The insertion hole 112, the inclined portion 113, and the protruding portion 114 constitute an insertion portion (burring). In this burring, the inclined part 113 and the protruding part 114 are continuously formed by press working, so the guide part 1
13 has an R shape.

The tube 200 is inserted into the insertion hole 112 of the burring. The pitch between the insertion holes 112 is 1iA, which is the tube 200.
The ventilation resistance of the air passing between the air and the tube 200
Considering the heat exchange efficiency between the refrigerant and air passing through the
It is said to be about a group.

Next, as shown in Figs. 3 and 4, the first Radavibe 120 (thickness: approximately 1.6M) is applied to the high temperature and high pressure (pressure crab approximately 100 kg/c111) refrigerant compressed and discharged from the compressor. In order to ensure pressure resistance, a tube having a cylindrical shape and formed by extrusion is used.

An insertion hole 122 is formed in the bottom part 121 by press working (the bottom part 121 and the insertion hole 122 constitute a third insertion part).

Note that the insertion hole may be formed by cutting.

Then, the above-mentioned bur ring is inserted into the insertion hole 122 and joined by brazing. Further, the bottom surface portion 12I includes each protruding portion 114 of the burring of the first hender cover 110 described above.
The bottom surface portion 111 located in between is engaged and joined by brazing.

As described above, since the first hender tank 100 is divided into two parts, the first helder cover 110 and the first header vibe 120, the first helder cover 110 can be formed by press working. Therefore, the first header cover 11
0 can be provided with a burring having a guide part 113.

Therefore, when inserting the tube 200 into the insertion hole 112, since the guide portion 113 having an R shape is formed at the boundary between the protruding portion 114 of the bar ring and the bottom surface portion 111, the tube 200 is inserted into the insertion hole 112. will be inserted.

Therefore, the tube 200 can be easily inserted into the insertion hole 112. That is, the tube 200 can be easily inserted into the insertion hole 112 even if the tube 200 is not accurately positioned in the insertion holes 1 and 2 or even if the axis of the tube 200 is misaligned with the axis of the insertion section. I can do it.

Furthermore, when the tube 200 is inserted into the insertion hole 112,
Since the joint surface between the tube 200 and the inner wall surface of the protrusion 114 is relatively long, brazing performance is improved and sufficient joint strength can be ensured.

Further, since the bottom surface portion 111 of the first header cover 110 and the bottom surface portion 121 of the first radar vibe 120 are joined by brazing, a large area can be secured by brazing. Therefore, sufficient pressure resistance can be ensured.

Note that the first ladder cover 110 may have a U-shaped cross section instead of a U-shape, and the first ladder cover 120 may have a square cross section.

Furthermore, as shown in FIG.
Two burrings of the first header cover 110 (FIGS. 1 and 2) may be inserted into 22.

[Brief explanation of drawings]

Figures 1 to 8 are diagrams showing one embodiment of the present invention.
The figure is a sectional view of the first header cover, Figure 2 is a side view of the first header cover, Figure 3 is a side view of the main part of Figure 7, and Figure 9 is a modification of the first header cover. 10 and 11 are diagrams showing one conventional embodiment, and the first
Figure 0 is a front view showing the joined state, and Figure 11 is a perspective view of the main parts. DESCRIPTION OF SYMBOLS 100... 1st header tank, 110... 1st header cover, 112, 113 (1st guide part), 114...
... Burring (first insertion part), 115... Opening end 2
0...1st header vibe. 12 l. ■ ・Third insertion part. O...Tube 00...2nd header pipe 0...1st header pipe 20...1st header pipe.

Claims (2)

[Claims] 1. A first header tank into which the fluid to be heat exchanged is introduced; a tube whose one end is connected to the first header tank and through which the fluid to be heat exchanged introduced into the first header tank passes; and the other end of the tube a second header tank that is connected to the tube and collects the fluid to be heat exchanged that has passed through the tube; and the first and second header tanks are connected to the first and second header tanks into which the tubes are inserted, respectively. first and second header covers having insertion portions; third and fourth insertion portions at portions of the first and second header covers facing the first and second insertion portions, respectively; It consists of first and second header pipes joined to a second header cover, and each of the first and second insertion portions has an opening end peripheral wall into which the tube is inserted, and is located inside the opening end, and Said first
. A heat exchanger comprising first and second guide portions that are inclined inwardly in a second header tank. 2. The first and second insertion portions may have first and second protrusion portions that protrude into the first and second header tanks, respectively, and are formed continuously with the first and second guide portions. The heat exchanger according to claim 1, characterized in that: