JP2002062084A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger in which a sealing member is eliminated in the case of placement of the heat exchanger in a case by eliminating difference in level in the outermost part of the heat exchanger. SOLUTION: In a core part 2 of the heat exchanger 1, fins 21, and tubes 22 are stacked, and inserts 23 are provided to both outermost parts of the stack. Each sheet metal 3 is joined in the longitudinal direction of the tube of the core 2. A capsule 4 is provided to the heat exchanger 1. An end 23a in the longitudinal direction of the inserts 23 is fit to a bottom 31 of the sheet metal 3. The outside surface in which short-side walls 35, 41 of the capsule 4 are jointed to each other is made flush with end parts 23d or 23e on the sides opposite to the tube. Short sides of the sheet metal 3 and the capsule 4 are opened to form openings 340, 341. Communication members 5 fitted to the openings 340, 341 and fitting parts 51 and 61 are made flush with a ceiling 47 of the capsule 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger provided in a case of an air conditioner for a vehicle, for example, which improves the sealing property between the case and the heat exchanger.

[0002]

2. Description of the Related Art A conventional heat exchanger is disclosed in JP-A-10-122.
As shown in Japanese Patent Publication No. 784, a device as shown in FIG. 14 is known. That is, the capsule 4 is fitted inside the sheet metal 3 communicating with the tube 22, and the insert 23 is inserted into the claw portion 39 provided on the short side wall portion 34 of the sheet metal 3.

[0003]

In this heat exchanger, between the short side wall portion 34 of the sheet metal 3 and the claw portion 39, and between the short side wall portion 34 of the sheet metal 3 and the short side wall of the capsule 4. A step portion will be formed between the portion 40 and, for example, when disposed in the case of the air conditioner, a gap is generated between the step portion and the inner surface of the case,
In order to prevent the air flow from leaking from the gap, an elastic sealing member 8 such as urethane material is bonded to the stepped portion. For this reason, cost is required for the seal member 8 itself, assembling thereof, and the like, and since the heat exchanger is provided with the seal member 8 made of a different material, the recyclability at the time of disposal is deteriorated.

An object of the present invention is to provide a heat exchanger that eliminates the need for a sealing member when mounted in a case by eliminating the steps of the outermost portion of the heat exchanger in view of the above problems. It is in.

[0005]

The present invention employs the following technical means to achieve the above object.

According to the first aspect of the present invention, the fins (2
1) and a tube (22) are alternately laminated, and a core portion (2) in which inserts (23) are disposed on both outermost portions, and tubes (2) disposed on both side surfaces of the core portion (2). 22)
A heat exchanger having a tank portion (9) that communicates with the at least one short side wall portion (3) of the tank portion (9).
5, 41) are substantially flush with the position of the end (23d, 23e) of the insert (23) on the side opposite to the tube.

[0007] With this, the end (23d, 23e) on the side opposite to the tube of the insert (23) and the tank (9) can be formed on the same surface without any level difference. When the air conditioner is disposed in the case (7) forming the air flow path of the air conditioner, no gap is formed between the case and the inner wall surface of the case, so that the conventional sealing member can be eliminated.

According to the second aspect of the present invention, the opening side of the sheet metal (3) and the capsule (4), each of which has an open end and a U-shaped cross section, are joined to the tank portion (9). The heat exchanger is a heat exchanger in which a longitudinal end (23a) of the insert (23) is fitted into a fitting hole (33) provided in a bottom (31) of the sheet metal (3), and at least one of the capsules (23) is fitted. The outer side surface where the short side wall portion (41) of (4) is joined to the short side wall portion (35) of the sheet metal (3) is connected to the end (23) opposite to the tube side of the insert (23).
d, 23e) are substantially flush with the position.

More specifically, the opening side of the capsule (4) is made of sheet metal (3).
And at least a portion of the short side wall (35) of the sheet metal (3) is extended to the ceiling (47) on the side opposite to the opening of the capsule (4).

According to a fourth aspect of the present invention, a stepped portion (indented inward) substantially equal to the thickness of the sheet metal (3) is formed on the opening side of the short side wall (41) of the capsule (4). 44) is provided so that the opening side of the capsule (4) is fitted inside the opening side of the sheet metal (3).

Thus, the end (23d, 23e) of the insert (23) on the side opposite to the tube and the short side wall (35) of the sheet metal (3) or the insert (2)
The end (23d, 23e) on the side opposite to the tube (3), the short side wall (35) of the sheet metal (3), and the short side wall (41) of the capsule (4) are formed on the same surface without any step. Therefore, similarly to the first aspect of the present invention, no gap is formed between the case inner wall surface and the conventional seal member can be eliminated.

According to the fifth aspect of the present invention, the fins (2
1) and a tube (22) are alternately laminated, and a core portion (2) in which inserts (23) are disposed on both outermost portions, and tubes (2) disposed on both side surfaces of the core portion (2). 22)
Having a tank part (9) communicating with the tank part (9), and a communicating member (5) joined to the opening part (340) opening on the short side of the tank part (9) and communicating with the tank part (9). In the exchanger, the ceiling (4) on the side opposite to the core (2) of the tank (9) where the opening (340) and the communication member (5) are joined.
7) is characterized in that the surfaces are substantially the same.

More specifically, as in the sixth aspect of the present invention, the connecting member (5) is provided on the joint side with the opening (340).
A fitting portion (51) that fits on the outer peripheral surface of the opening (340) is provided, and the ceiling (47) side of the opening (340) is recessed inward to a depth substantially equal to the thickness of the communication member (5). Department (48)
Is provided.

Thus, for example, when the communication member (5) having a large flow path area is set in order to reduce the flow resistance of the fluid flowing inside, the fitting portion (51) of the communication member (5) is used. There is no step in the ceiling part (47) of the tank part (9) and there is no gap between it and the inner wall surface of the case, and the conventional sealing member can be eliminated.

According to the invention described in claim 7, the fins (2
1) and a tube (22) are alternately laminated, and a core portion (2) in which inserts (23) are disposed on both outermost portions, and tubes (2) disposed on both side surfaces of the core portion (2). 22)
And a closing member (6) joined to an opening (341) opened on the short side of the tank (9) to close the opening (341). In the heat exchanger, the ceiling (47) on the side opposite to the core (2) of the tank (9) where the opening (341) and the closing member (6) are joined is made to be substantially flush with each other. It is characterized by.

More specifically, as in the invention according to claim 8, on the side of the closing member (6) joined to the opening (341),
A fitting portion (61) that fits on the outer peripheral surface of the opening (341) is provided, and the ceiling (47) side of the opening (341) is indented inward to a depth substantially equal to the plate thickness of the closing member (6). Department (49)
Is provided.

Thus, even when the short side of the tank (9) is opened and joined by the closing member (6), the fitting part (61) and the ceiling part (47) of the tank part (9). There is no step, and there is no gap between the inner wall of the case and the conventional sealing member can be eliminated.

Note that the reference numerals in parentheses of the above-mentioned means indicate the correspondence with specific means described in the embodiment described later.

[0019]

(First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention. The heat exchanger of the present invention is applied to a heater core for heating air in a vehicle air conditioner.

FIG. 1 is an external view of the heater core 1, FIG. 2 is an exploded perspective view, and FIGS. 3 and 4 are sectional views. Core part 2
Are a plurality of tubes 22 through which the engine cooling water flows.
And corrugated fins (hereinafter, fins) 21 for improving heat exchange performance are alternately stacked. And
Inserts 23 are provided on both side surfaces of both outermost fins 21 to form the core portion 2.

The insert 23 has a substantially U-shaped cross section and has a flange 23b extending toward the opposite side of the tube. Further, a rectangular rib 23c extending in the longitudinal direction is provided at the center in the width direction of the insert 23, and the height of the rib 23c and the flange 23b in the laminating direction of the tube 22 is set to the same dimension h. I am trying to become. And the claw 23 is provided at the longitudinal end of the insert 23.
a is provided.

The core 2 in the longitudinal direction of the tube 22
A tank 9 is provided on both side surfaces of the sheet metal. The tank 9 includes the sheet metal 3 and the capsule 4. The sheet metal 3 has a box shape with one end opened and a U-shaped cross section, and a communication hole 32 formed in the bottom 31 on the other end side.
And a fitting hole 33 are provided. The tube end 22 a fits into the communication hole 32 and communicates with the sheet metal 3, and the claw 23 a of the insert 23 fits into the fitting hole 33. In a state where the claw 23a is fitted in the fitting hole 33, the short side walls 34 and 35 of the sheet metal 3 and the flange end 23d and the rib end 23e of the insert 23 are fitted so that they are located on the same plane. The position of the hole 33 is set. Then, as shown in FIG. 2 and FIG.
In the center of the lower short side wall 35 on the lower side, the extension wall 3 extending to the position of the ceiling 47 on the side opposite to the opening of the capsule 4 described later.
5a is provided integrally.

The capsule 4 has a box shape having an open end and a U-shaped cross section. The upper short side wall 40 is provided with a circular pipe hole 40a. 3 is fitted inside the opening side. A pipe 53 into which cooling water from an engine (not shown) flows and flows out is fitted into the pipe hole 40a. Also,
The extended wall 35a of the sheet metal 3 is joined to the lower short side wall 41.

The fin 21, tube 22, insert 23, sheet metal 3, capsule 4, pipe 53
Is made of an aluminum alloy material, and after being formed into an assembly of the heater core 1, the tube 22, the insert 23,
The sheet metal 3 and the capsule 4 are integrally brazed by an aluminum brazing material clad on the surface.

Engine cooling water flows in from one of the pipes 53, flows through the tube 22, and flows out of the other pipe 53. During this time, the heater core 1 heats the air passing through the core portion 2.

With the above configuration, the claw 2 of the insert 23
3a is fitted and fixed in the fitting hole 33 of the bottom portion 31 of the sheet metal 3, so that there is no step in the short side wall portions 34 and 35 of the sheet metal 3 unlike the conventional heater core. Further, the extension wall portion 35a of the sheet metal 3
Is extended to the ceiling portion 47 of the capsule 4, so that no step is formed in the fitting portion (joining portion) between the sheet metal 3 and the capsule 4, and in addition, the extension end 35a and the flange end 23d of the insert 23 are provided. , And the rib end 23e are formed on the same plane.
Is formed on the same surface without a step. Therefore, as shown in FIG. 3, the case 7 forming the air flow path of the air conditioner
In the case where it is disposed inside, there is no gap between the inner wall surface of the case 7 and the lower side as well as the left and right sides. In addition, the sealing member can be eliminated.

As shown in FIGS. 4A and 4B, the case 7 is provided with a seal rib 7a,
a, If the heater core 1 is arranged so as to press the rib end 23e, reliable sealing can be achieved without impairing the moldability of the case 7.

Here, the flange 2 of the insert 23 is used.
3b and the height h of the rib 23c have been described as being the same, but since the rib end 23e and the sealing rib 7a of the case 7 are sealed as shown in FIG. 4B, the height of the flange 23b is You may make it smaller than the height of the rib 23c.

(Second Embodiment) FIGS. 5 and 6 show a second embodiment of the present invention. The second embodiment is different from the first embodiment in that the fitting (joining) shape of the sheet metal 3 and the capsule 4 is changed.

The basic structure is the same as that of the first embodiment, and different parts will be described in detail. The sheet metal 3 has a simple box shape. But,
On the opening side of the short side wall portion 41 of the capsule 4, a side wall step portion (step portion) 44 substantially equal in thickness to the sheet metal 3 is provided so as to be recessed inward. The opening side of the capsule 4 is fitted inside the opening side of the sheet metal 3.

As a result, as shown in FIG. 6, the short side wall portions 35 of the sheet metal 3 and the short side wall portions 4 of the capsule 4 are formed.
1 can be formed on the same surface by the side wall step portion 44, and no step occurs. Further, since the sheet metal 3 and the flange end 23d and the rib end 23e of the insert 23 are formed on the same plane as in the first embodiment, the same effects as in the first embodiment are obtained. can get.

The flange end 23d and the rib end 23e
May be formed on the same plane as the short side wall portions 35 and 41, and the other may be formed so as to be shifted toward the tube 22 side.

(Third Embodiment) FIGS. 7 to 9 show a third embodiment of the present invention. In the third embodiment, a pipe 53 is changed from the first embodiment.

The pipe 53 of the first embodiment cannot secure a sufficient inner diameter if the width H of the capsule 4 in the longitudinal direction of the tube is restricted, and causes an increase in the resistance of cooling water flowing through the inside. For this reason, the joint pipe 5 is used as a communication member that opens larger than the width dimension H of the capsule 4.

An opening 340 is formed without a wall on the upper short side of the sheet metal 3 and the capsule 4 constituting the tank portion 9. A ceiling step portion (step portion) 48 substantially equal to the plate thickness of the joint pipe 5 is provided on the ceiling portion 47 on the opening 340 side of the capsule 4 so as to be recessed inward.

On the other hand, the joint pipe 5 includes a flange portion (fitting portion) 51 having one end opened and a pipe portion 52 having a large opening toward the other end, and is integrally formed. The flange 51 is fitted to the outer peripheral surface of the opening 340 so as to communicate with the sheet metal 3 and the capsule 4.

Accordingly, as shown in FIG. 9, even when the flange portion 51 is fitted to the outer peripheral portion of the opening 340 like the joint pipe 5, the ceiling step portion 48 is provided, so that the flange portion 51 There is no step on the ceiling 47 of the capsule 4. Further, no gap is formed between the case 7 and the lateral inner wall surface, and the conventional sealing member can be eliminated.

(Fourth Embodiment) FIGS. 10 and 11 show a fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment in that the short side walls 35 and 41 on the lower side of the sheet metal 3 and the capsule 4 are opened and closed by a cap 6 as a closing member.

An opening 341 is formed without providing a wall on the lower short side of the sheet metal 3 and the capsule 4. Further, a ceiling step portion (step portion) 49 substantially equal to the plate thickness of the cap 6 is provided in the ceiling portion 47 on the opening 341 side of the capsule 4 so as to be recessed inward.

On the other hand, the cap 6 comprises a flange portion 61 and a closing wall portion 62, and is integrally formed. Then, the flange portion 61 is fitted with the outer peripheral surface of the opening 341,
The sheet metal 3 and the capsule 4 are closed.

The outer surface of the closing wall 62 after the cap 6 is fitted into the opening 341 is flush with the flange end 23d and the rib end 23e of the insert 23.

Thus, as shown in FIG. 11, even when the flange portion 61 is fitted to the outer peripheral portion of the opening 341 as in the case of the cap 6, since the ceiling step 49 is provided, the flange portion 61 and the capsule There is no step in the ceiling 47 of the fourth. Further, since the outer surface of the closing wall portion 62 of the cap 6 is made to be flush with the flange end portion 23d and the rib end portion 23e of the insert 23, the outer surface of the closing wall portion 62 is in contact with the lateral inner wall surface and the lower inner wall surface of the case 7. There is no gap between them, and the conventional sealing member can be eliminated.

The flange end 23d and the rib end 23e
As in the second embodiment, any one may be formed on the same plane as the closing wall portion 62, and the other may be formed so as to be shifted toward the tube 22 side.

(Other Embodiments) In comparison with the first and second embodiments, the joining shape of the short side wall portions of the sheet metal 3 and the capsule 4 is as shown in FIGS. 12 (a) and 12 (b). Even if the extended wall portion 35a of the sheet metal 3 and the side wall step portion 44 of the capsule 4 are not provided, the capsule 4 can be fitted to the outside of the sheet metal 3 or the sheet metal 3 and the capsule 4 can be abutted with each other. The effect of can be obtained.

Further, in comparison with the fourth embodiment, the flange portions 51 and 61 of the joint pipe 5 and the cap 6 are provided.
As shown in FIGS. 13 (a) and 13 (b), the flange portion 51,
A similar effect can be obtained by fitting 61 inside openings 340 and 341 or by abutting openings 61 and 341.

Further, in the above embodiment, the heat exchanger is described as a heater core used in an air conditioner for a vehicle. However, the heat exchanger can be provided so as to eliminate a step in the outline of the heat exchanger. 4
4. Since the sheet metal 3, the joint pipe 5, and the cap 6 can be reduced in size by forming the ceiling steps 48, 49, the mountability to the vehicle can be improved, and the invention is not limited to the arrangement in the case. It may be applied to other heat exchangers such as radiators and condensers.

[Brief description of the drawings]

FIG. 1 is an external view of an entire heater core according to a first embodiment.

FIG. 2 is an exploded perspective view of a heater core according to the first embodiment.

FIG. 3 is a sectional view of a heater core according to the first embodiment.

4A is a cross-sectional view along AA, and FIG. 3B is a cross-sectional view along BB in FIG.

FIG. 5 is an exploded perspective view of a heater core according to a second embodiment.

FIG. 6 is a cross-sectional view of a heater core according to a second embodiment.

FIG. 7 is an external view of a heater core according to a third embodiment.

FIG. 8 is an exploded perspective view of a heater core according to a third embodiment.

FIG. 9 is a cross-sectional view of a heater core according to a third embodiment.

FIG. 10 is an exploded perspective view of a heater core according to a fourth embodiment.

FIG. 11 is a sectional view of a heater core according to a fourth embodiment.

12A is a cross-sectional view of a first modification, and FIG. 12B is a cross-sectional view of a second modification.

13A is a cross-sectional view of a third modification, and FIG. 13B is a cross-sectional view of a fourth modification in another embodiment.

FIG. 14 is an external view showing a conventional heater core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heater core (heat exchanger) 2 Core part 21 Fin 22 Tube 22a Tube end (tube longitudinal end) 23 Insert 23a Claw (insert longitudinal end) 23d Flange end (opposite tube end) 23e Rib end Part (end opposite to tube side) 3 Sheet metal 31 Bottom part 32 Communication hole 33 Fitting hole 35 Short side wall part 4 Capsule 41 Short side wall part 44 Side wall step part (step part) 47 Ceiling part 48, 49 Ceiling step part ( Step part) 5 Joint pipe (communication member) 51 Flange part (fitting part) 6 Cap (blocking member) 61 Flange part (fitting part) 340, 341 Opening part 9 Tank part

Claims (8)

[Claims] 1. A core portion (2) in which fins (21) and tubes (22) are alternately stacked, and inserts (23) are provided on both outermost portions, and both side surfaces of the core portion (2). And a tank portion (9) communicating with the tube (22), wherein at least one short side wall portion (3) of the tank portion (9) is provided.
5, 41) The heat exchanger wherein the insert (23) is substantially flush with the end (23d, 23e) of the insert (23) on the side opposite to the tube. 2. A core portion (2) in which fins (21) and tubes (22) are alternately stacked, and an insert (23) is provided on both outermost portions, and a bottom portion on one end side and open on the other end side. The longitudinal end (22) of the tube (22) is inserted into the communication hole (32) provided in the (31).
a) communicates with each other, and a sheet metal (3) having a U-shaped cross section and a box-shaped cross section having a U-shaped opening at one end, and the opening side is formed of the sheet metal (3). A heat exchanger having a capsule (4) joined to an opening side of the insert (23), wherein a longitudinal end (23a) of the insert (23) is:
A fitting hole (33) provided in a bottom portion (31) of the sheet metal (3) is fitted, and a short side wall portion (41) of at least one of the capsules (4) and the sheet metal (3) are Short side wall (3
5) The heat exchanger characterized in that the outer surface joined with the above (5) is substantially flush with the end (23d, 23e) of the insert (23) on the side opposite to the tube. 3. The opening side of the capsule (4) is fitted inside the opening side of the sheet metal (3), and at least a part of the short side wall (35) of the sheet metal (3) is formed. Heat exchanger according to claim 2, characterized in that it extends to the ceiling (47) opposite the opening of the capsule (4). 4. A short side wall portion (4) of the capsule (4).
The opening side of 1) has a stepped portion (44) that is recessed inward substantially equal to the thickness of the sheet metal (3), and the opening side of the capsule (4) is the opening side of the sheet metal (3). The heat exchanger according to claim 2, wherein the heat exchanger is fitted inside the heat exchanger. 5. A core part (2) in which fins (21) and tubes (22) are alternately laminated, and inserts (23) are provided on both outermost sides, and both side surfaces of the core part (2). And a tank portion (9) communicating with the tube (22), and an opening (34) opening on the short side of the tank portion (9).
0) and a communication member (5) that communicates with the tank portion (9), wherein the tank portion (340) in which the opening (340) and the communication member (5) are joined. 9) The ceiling (4) on the side opposite to the core (2)
7) is a heat exchanger characterized in that they are substantially flush with each other. 6. The opening (34) of the communication member (5).
0) has a fitting portion (51) fitted to the outer peripheral surface of the opening (340), and the ceiling (47) side of the opening (340) is the communication member. The heat exchanger according to claim 5, characterized in that it has a stepped portion (48) that is recessed inward substantially equal to the plate thickness of (5). 7. A core part (2) in which fins (21) and tubes (22) are alternately stacked, and inserts (23) are provided on both outermost sides, and both side surfaces of the core part (2). And a tank portion (9) communicating with the tube (22), and an opening (34) opening on the short side of the tank portion (9).
1) a heat exchanger having a closing member (6) joined to the opening (341) and closing the opening (341), wherein the tank portion (341) where the opening (341) and the closing member (6) are joined. 9) The ceiling (4) on the side opposite to the core (2)
7) is a heat exchanger characterized in that they are substantially flush with each other. 8. The opening (34) of the closing member (6).
1) has a fitting portion (61) fitted to the outer peripheral surface of the opening (341), and the ceiling (47) side of the opening (341) is the closing member. 8. The heat exchanger according to claim 7, further comprising a stepped portion (49) that is recessed inward substantially equal to the plate thickness of (6). 9.