JP2003004395A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger that can prevent the falling, etc., of an outside attaching member due to expanded air produced when the member is heated at brazing time. SOLUTION: This heat exchanger has an air communicating section which makes a space surrounded by the end sections of tanks 41 and 42, a blocking member 5, and the outside attaching member 7 to communicate with the outside air. Particularly, a side plate inserting hole 422 into which the end section 82 of a side plate 8 is inserted is made through the wall of the tank 42, and a clearance C2 formed between the side plate 8 and the hole 422 is used as the air communicating section.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a heat exchanger.

[0002]

2. Description of the Related Art A so-called parallel flow type heat exchanger is used as a heat exchanger for an automobile air conditioner.
This is composed of a plurality of tubes and a cylindrical tank which is connected to the ends of the tubes so that the medium is distributed from the tank to the tubes, and the media flowing through the tubes gather in the tank.

A partition plate is provided inside the tank so that the medium flows in a meandering manner from tank to tank.

It has been proposed to use this partition plate as a closing member for the end opening of a cylindrical tank from the viewpoint of common parts. When a partition plate is used, it will be provided at a position slightly behind the edge of the tank.

Further, for example, a lid-shaped external mounting member having a locking pin is brazed to the end of the tank, and the locking pin is locked in a corresponding locking hole provided in the frame of the vehicle body. Therefore, it has been proposed to attach the heat exchanger to the vehicle body.

The above-mentioned constituent members are assembled as a heat exchanger, temporarily fixed, and then collectively brazed in a furnace to be joined.

[0007]

In the above heat exchanger, the space between the closing member and the external mounting member is formed at the end of the tank.

If this space is airtight, there is a problem in that, for example, the external mounting member may fall off or tilt due to expansion of the internal air during brazing and heating.

The present invention has been made in view of the above points, and an object of the present invention is to provide a heat exchanger capable of preventing the external mounting member from falling off during brazing heating.

[0010]

The invention according to claim 1 is
A tube that circulates a medium, a cylindrical tank that is connected to the end of the tube for communication, a closing member that is brazed at a position that is recessed a predetermined length from the edge of the tank, and an end of the tank An external mounting member that is brazed to the outer surface of the tank, the heat exchanger having a space surrounded by the end of the tank, the closing member, and the external mounting member. A heat exchanger having an air communication portion communicating with the heat exchanger.

According to the present invention, the air communicating portion communicating with the outside air is provided so as to allow the air to escape, so that the heat exchanger capable of preventing the external mounting member from falling off during brazing heating. Can be provided.

A second aspect of the present invention is the heat exchanger according to the first aspect of the invention, wherein the air communicating portion is an air vent hole or a notch provided in the external mounting member. .

According to the present invention, an air vent hole or a notch is provided in the external mounting member to allow air to escape, so that it is possible to prevent the external mounting member from falling off during brazing heating. A heat exchanger can be provided.

A third aspect of the present invention is the heat exchanger according to the first aspect, wherein the air communication portion is an air vent hole or a notch provided in the tank.

According to the present invention, the tank is provided with the air vent hole or the notch so that the air is released. Therefore, the heat exchanger capable of preventing the external mounting member from falling off during brazing heating. Can be provided.

According to a fourth aspect of the present invention, in the third aspect of the invention, the tank is provided with a side plate, and a side plate insertion hole for inserting an end portion of the side plate is integrally formed with the air vent hole or the notch. It is a heat exchanger characterized by being provided in.

According to the present invention, since the side plate insertion hole is provided integrally with the air vent hole, it is not necessary to separately form the air vent hole, and it is possible to efficiently prevent the external mounting member from falling off during brazing heating. It is possible to provide a heat exchanger that can do so.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a side plate is provided, a side plate insertion hole for inserting an end portion of the side plate is provided in the tank, and the air communicating portion is It is a heat exchanger characterized by a clearance provided between an end of the side plate and the side plate insertion hole.

According to the present invention, a clearance is provided between the end portion of the side plate and the side plate insertion hole to allow air to escape, so that the external mounting member may fall off during brazing heating. It is possible to provide a heat exchanger capable of preventing the above.

A sixth aspect of the present invention is the heat exchanger according to the first aspect, wherein the air communication portion is a clearance provided between the external mounting member and the tank. Is.

According to the present invention, a clearance is provided between the external mounting member and the tank to allow air to escape, so that the external mounting member is prevented from falling off during brazing and heating. It is possible to provide a heat exchanger capable of

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings.

First, the structure common to each specific example will be described with reference to FIGS.

FIG. 1 is a front view showing a heat exchanger.

The heat exchanger 1 is constructed by alternately stacking a plurality of tubes 2 and a plurality of fins 3, and connecting the ends of each tube 2 to a pair of tanks 4, respectively.

The inside of the tank 4 is partitioned by a partition plate 5 so that the medium flows in a meandering manner from the tank 4 to the tank 4. Further, the end opening of the tank 4 is also closed by the partition plate 5. That is, the outermost partition plate 5 serves as a closing member.

The medium is an inlet portion 61 provided in the tank 4.
Is taken into the inside of the tube 2 and is heat-exchanged by the heat transmitted to the tube 2 and the fins 3, and is circulated in a meandering shape through the tube 2, and then discharged to the outside from an outlet portion 62 provided in the tank 4.

A lid-shaped external mounting member 7 is externally fitted to the end of the tank 4. The external mounting member 7 is processed by cold forging.

The external mounting member 7 is provided with a locking pin 71, and the locking pin 71 is locked in a corresponding locking hole provided in the frame of the vehicle body so that the heat exchanger 1 can be mounted on the vehicle body. It has become.

Side plates 8 serving as reinforcing members are provided above and below the layer composed of the tubes 2 and the fins 3, and the end portions of the side plates 8 are supported by the tank 4.

Each of the above-mentioned constituent members is assembled as a heat exchanger and temporarily fixed, then carried into a brazing furnace and integrally brazed by a brazing material clad to a predetermined portion of a predetermined member in advance.

FIG. 2 is an exploded perspective view showing the tank, FIG. 3 is a partially enlarged plan view of the heat exchanger, and FIG. 4 is a transverse sectional view showing the tank.

As shown in the figure, the tank 4 of this embodiment is formed by combining a tank plate 41 having a substantially U-shaped cross section and an end plate 42 into a substantially cylindrical shape, and a partition plate 5 is provided therein. ing.

A partition plate insertion hole 411 is provided in the tank plate 41, and the partition plate 5 is positioned and temporarily fixed by inserting the projecting piece portion 51 of the partition plate 5 into the partition plate insertion hole 411.

The end plate 42 is provided with a plurality of tube insertion holes 421 for inserting the ends of the tubes 2 in the longitudinal direction, and side plate insertion holes 422 for inserting the ends of the side plates 8.

The end plate 42 is positioned by bringing the end plate 42 into contact with the partition plate 5, and the caulking claws 412 provided on the tank plate 41.
It is temporarily fixed by caulking.

The side plate 8 is provided with rising pieces 81 along both side edges, and has a U-shaped cross section to increase strength.

The rising piece 81 is not provided in the insertion portion 82, and the rising piece 81 is not included in the side plate insertion hole 4.
By abutting on the edge of 21, the insertion amount is regulated and positioned.

Each specific example will be described below. In addition,
The upper end of the tank will be described as an example, but the lower end also
It is the same except that it is turned upside down.

Next, a first specific example will be described with reference to FIG.

FIG. 5 is a vertical sectional view showing the tank of the first embodiment. Arrows indicate the flow of air.

In this example, the air vent hole 7 is formed in the external mounting member 7.
2 is provided to allow air to escape from the air vent hole 72.

Next, a second specific example will be described with reference to FIG.

FIG. 6 is a vertical sectional view showing a tank of the second specific example. Arrows indicate the flow of air.

In this example, the external attachment member 7 is provided with a notch 73, and air is allowed to escape from the notch 73.

The notch 73 can be efficiently formed by cold forging without cutting.

Next, a third specific example will be described with reference to FIG.

FIG. 7 is a sectional view showing a side plate and a side plate insertion hole of the third embodiment.

In this example, the side plate insertion hole 422 is provided in the tank 4 integrally with the air vent hole 423.

Next, a fourth specific example will be described with reference to FIG.

FIG. 8 is a sectional view showing a side plate and a side plate insertion hole of the fourth embodiment.

In this example, the side plate insertion hole 422 is provided in the tank 4 integrally with the notch 424. Notch 42
The upper part of 4 is closed by an external mounting member 7, and the remaining part becomes an air communication part.

Next, fifth to seventh specific examples will be described with reference to FIGS.
It will be described based on.

FIG. 9 shows a fifth embodiment, FIG. 10 shows a sixth embodiment, and FIGS. 12 and 13 show sectional views showing side plates and side plate insertion holes of a seventh embodiment. FIG. 11 is a vertical cross-sectional view showing the tank of the sixth example.

In these specific examples, a clearance is provided between the end of the side plate 8 inserted into the side plate insertion hole 422 and the side plate insertion hole 422, and air is allowed to escape from this clearance.

The applicant of the present application has previously installed a heat exchanger in which the tube insertion holes and the side plate insertion holes have the same shape, the same size, and the same distance so that tank plates having different lengths can be manufactured by one mold. is suggesting.

These specific examples can be suitably applied to the above heat exchanger because the side plate insertion holes are substantially rectangular.

In the fifth specific example shown in FIG. 9, the height of the side plate insertion hole 422 is equal to the thickness of the side plate 8, and the side plate 8 is provided with a recess 83.
Due to the concave portion 83, a clearance C1 is formed between the side plate 8 and the upper edge of the side plate insertion hole 422.

In the sixth specific example shown in FIGS. 10 and 11 and the seventh specific example shown in FIGS. 12 and 13, the thickness of the side plate 8 is set smaller than the height of the side plate insertion hole 422. As a result, a clearance C2 is formed between the side plate 8 and the upper edge of the side plate insertion hole 422. According to these specific examples, since the side plate is thin, the material cost can be reduced.

In the seventh example shown in FIGS. 12 and 13, the side plate 8 is provided with a convex portion 84. The sum of the height of the convex portion 84 and the thickness of the side plate 8 is equal to the height of the side plate insertion hole. The convex portion 84 prevents the side plate 8 from being displaced in the upward direction in the drawing without using a jig during brazing.
Can be brazed well.

As shown in FIG. 13, it is efficient to form the convex portion 84 by pressing. In this case, a concave portion 85 is formed on the opposite side of the convex portion 84, and the concave portion 85 forms the side plate 8 and the side plate insertion hole 422.
A clearance C3 is formed between the lower edge and the lower edge.

Next, an eighth specific example will be described with reference to FIG.

FIG. 14 shows the tank of the eighth embodiment, and FIG.
2 is a cross-sectional view taken along line I-I of FIG. Arrows indicate the flow of air.

As shown in FIGS. 4 and 14, the external mounting member 7 has a shape having a clearance C4 between itself and the outer peripheral surface of the tank. Further, a notch 425 is provided at the end edge of the end plate 42, and by this notch 425,
A clearance C5 is also formed between the external mounting member 7 and the edge of the end plate 42. The clearances C4 and C5 form an air communication portion.

An air vent hole may be provided instead of the notch 425.

Next, a ninth specific example will be described with reference to FIG.

FIG. 15 shows a tank of the ninth embodiment, and FIG.
2 is a cross-sectional view taken along line I-I of FIG. Arrows indicate the flow of air.

As shown in FIGS. 4 and 15, the external mounting member 7 has a shape having a clearance C4 between itself and the outer peripheral surface of the tank. Further, the external mounting member 7 has a recess 7
4 is provided, and by this recess 74, the external mounting member 7
And the clearance C between the edge of the end plate 42 and
6 is formed. The clearances C4 and C6 form an air communication portion.

The clearance C4 between the external mounting member 7 and the outer peripheral surface of the tank in the eighth and ninth specific examples.
As for the external mounting member 7 and the end plate 42, the brazing material is not clad on the outer surface of the end plate 42.
It can also be formed by not brazing the outer surface of the. Moreover, in this case, since there is no concern about the erosion of the fin 3 due to the brazing material, the clearance between the fin 3 and the end plate 42 can be reduced, which leads to an improvement in performance.

Although the tank 4 composed of the tank plate 41 and the end plate 42 has been described above as an example, the present invention is not limited to this, and the tank 4 composed of a single member may be used.

[0071]

As described above, according to the first aspect of the present invention, the tube through which the medium flows, the cylindrical tank that is connected to the end of the tube for communication, and the predetermined edge from the edge of the tank are provided. A closing member that is brazed to a position that is recessed in length,
An external mounting member brazed to an end portion of the tank, the heat exchanger being surrounded by the end portion of the tank, the closing member, and the external mounting member. It is a heat exchanger characterized by having an air communication part which communicates the open space with the open air.

According to the present invention, the air communicating portion communicating with the outside air is provided so as to allow the air to escape, so that the heat exchanger capable of preventing the external mounting member from falling off during brazing heating. Can be provided.

A second aspect of the present invention is the heat exchanger according to the first aspect, wherein the air communicating portion is an air vent hole or a notch provided in the external mounting member. .

According to the present invention, an air vent hole or a notch is provided in the external mounting member to allow air to escape, so that it is possible to prevent the external mounting member from falling off during brazing and heating. A heat exchanger can be provided.

A third aspect of the present invention is the heat exchanger according to the first aspect, wherein the air communicating portion is an air vent hole or a notch provided in the tank.

According to the present invention, the tank is provided with the air vent hole or the notch to allow the air to escape, so that it is possible to prevent the external mounting member from falling off during brazing heating. Can be provided.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a side plate is provided, and a side plate insertion hole for inserting an end portion of the side plate is integrally formed with the air vent hole or the notch. It is a heat exchanger characterized by being provided in.

According to the present invention, since the side plate insertion hole is provided integrally with the air vent hole, it is not necessary to separately form the air vent hole, and the external mounting member is effectively prevented from falling off during brazing heating. It is possible to provide a heat exchanger that can do so.

According to a fifth aspect of the present invention, in addition to the first aspect of the present invention, a side plate is provided, a side plate insertion hole for inserting an end portion of the side plate is provided in the tank, and the air communicating portion is It is a heat exchanger characterized by a clearance provided between an end of the side plate and the side plate insertion hole.

According to the present invention, a clearance is provided between the end portion of the side plate and the side plate insertion hole to allow air to escape, so that the external mounting member may fall off during brazing heating. It is possible to provide a heat exchanger capable of preventing the above.

According to a sixth aspect of the invention, in the first aspect of the invention, the air communicating portion is a clearance provided between the external mounting member and the tank. Is.

According to the present invention, a clearance is provided between the external mounting member and the tank to allow air to escape, so that the external mounting member is prevented from falling off during brazing heating. It is possible to provide a heat exchanger capable of

[Brief description of drawings]

FIG. 1 is a front view showing a heat exchanger according to a specific example of the present invention.

FIG. 2 is an exploded perspective view showing a tank according to a specific example of the present invention.

FIG. 3 is a partially enlarged plan view showing a heat exchanger according to a specific example of the present invention.

FIG. 4 is a cross-sectional view showing a tank according to a specific example of the present invention.

FIG. 5 is a vertical cross-sectional view showing a tank according to the first example of the present invention.

FIG. 6 is a vertical cross-sectional view showing a tank according to a second example of the present invention.

FIG. 7 is a cross-sectional view showing a side plate and a side plate insertion hole according to a third example of the present invention.

FIG. 8 is a cross-sectional view showing a side plate and a side plate insertion hole according to a fourth example of the present invention.

FIG. 9 is a sectional view showing a side plate and a side plate insertion hole according to a fifth example of the present invention.

FIG. 10 is a cross-sectional view showing a side plate and a side plate insertion hole according to a sixth example of the present invention.

FIG. 11 is a vertical cross-sectional view showing a tank according to a sixth example of the present invention.

FIG. 12 is a cross-sectional view showing a side plate and a side plate insertion hole according to a seventh example of the present invention.

FIG. 13 is a cross-sectional view showing a side plate and a side plate insertion hole according to the seventh example of the present invention.

FIG. 14 relates to an eighth example of the present invention and is II in FIG.
It is a line sectional view.

FIG. 15 relates to a ninth example of the present invention and is taken along the line II of FIG.
It is a line sectional view.

[Explanation of symbols]

1 heat exchanger 2 tubes Three fins 4 tanks 41 tank plate 411 Partition plate insertion hole 412 Caulking Claw 42 End plate 421 tube insertion hole 422 Side plate insertion hole 423 Air vent hole 424 Notch 425 Notch 5 Partition plate (the outermost one is a closing member) 51 Projection part 61 Entrance 62 Exit 7 External mounting members 71 Locking pin 72 Air vent hole 73 Notch 74 recess 8 side plates 81 rising piece 82 Insert 83 recess 84 convex 85 recess C1 clearance C2 clearance C3 clearance C4 clearance C5 clearance C6 clearance

Claims (6)

[Claims] 1. A tube through which a medium flows, a tubular tank which is connected to the end of the tube for communication, and a closing member which is brazed at a position recessed by a predetermined length from the edge of the tank. An external mounting member brazed to an end of the tank, wherein the heat exchanger is surrounded by the end of the tank, the closing member, and the external mounting member. A heat exchanger having an air communication portion that communicates the space with the outside air. 2. The heat exchanger according to claim 1, wherein the air communication portion is formed by an air vent hole or a notch provided in the external mounting member. 3. The heat exchanger according to claim 1, wherein the air communication portion is formed by an air vent hole or a notch provided in the tank. 4. The tank according to claim 3, further comprising a side plate, wherein a side plate insertion hole for inserting an end portion of the side plate is provided in the tank integrally with the air vent hole or the notch. Heat exchanger. 5. A side plate is provided, and a side plate insertion hole for inserting an end portion of the side plate is provided in the tank, and the air communicating portion is provided between the end portion of the side plate and the side plate insertion hole. The heat exchanger according to claim 1, wherein the heat exchanger is a clearance provided therebetween. 6. The heat exchanger according to claim 1, wherein the air communication portion is a clearance provided between the external mounting member and the tank.