JPH04340092A - Laminated type heat exchanger - Google Patents

Abstract

PURPOSE:To improve productivity, to reduce a cost, and to enhance a connecting strength of a side plate to a plate header by maintaining a temporarily assembled state without using a jig. CONSTITUTION:Through holes 4b are formed at both ends of a plate header 4, and a protruding piece 3a to be inserted into the hole 4b and a contact piece 3b abutting on the outer periphery of the header 4 in a state that the piece 3a is inserted into the hole 4b, are provided at both ends of the plate 3. The piece 3a is inserted into the hole 4b, and the end protruding from the hole 4b is caulked in a state that the outer periphery of the header 4 is made to abut on the piece 3b to secure the header 4.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked heat exchanger in which tubes forming fluid passages and heat radiation fins are alternately stacked.

0002

2. Description of the Related Art As shown in FIG. 7, this stacked heat exchanger has tubes 100 and fins 101 stacked alternately, and side plates 102 support both outer sides in the stacking direction. Both ends of the header 103 are connected to the header 103. The side plate 102 is, for example,
As disclosed in Japanese Patent No. 4-54688, it is brazed to the header 103 with both bent ends in contact with the outer peripheral surface of the header 103.

0003

However, a laminated heat exchanger manufactured by integral brazing requires a jig to maintain the temporarily assembled core shape until the brazing is completed. For example, in the heat exchanger disclosed in the above publication, the side plate 10 is
2 can constrain the header 103, but (
It does not have any restraining force in the directions (a) and (c), and a jig is required to restrain it in the directions (a) and (c).

As a result, the conventional laminated heat exchanger requires a jig until the brazing is completed, resulting in poor workability and reduced productivity due to an increase in the number of work steps. In addition, the cost increases due to the jig costs.

[0005] Furthermore, when this laminated heat exchanger is used as a refrigerant condenser in a refrigeration cycle, the side plate 1
02 may support a bracket or fix an electric fan. For this reason, the side plate 102
It is necessary to increase the bonding strength between the header 103 and the header 103 to improve reliability in terms of strength.

The present invention has been made based on the above circumstances, and its purpose is to improve productivity and reduce costs by maintaining the temporarily assembled state without using jigs. The object of the present invention is to provide a laminated heat exchanger with improved bonding strength between side plates and plate headers.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a structure in which tubes forming fluid passages and heat radiation fins are alternately stacked, and side plates are disposed on both outer sides in the stacking direction. and a header is connected to both ends of each tube, and this header is divided into two in the passage direction of the tube, with a plate header forming the inside thereof and a tank header forming the outside thereof, and the plate header and the tank header forming the plate header. and a cap that closes both end openings of a cylindrical body formed by combining the plate header with through holes formed at both ends of the plate header, and a through hole formed at both ends of the side plate with the plate A protruding piece is provided to be inserted into the through hole when assembled with the header, and a contact piece is provided which comes into contact with the outer peripheral surface of the plate header when the protruding piece is inserted into the through hole. After the protruding piece is inserted into the through hole, the tip portion protruding from the through hole is plastically deformed to fix the plate header while the outer peripheral surface of the plate header is in contact with the contact piece. technical means to do so.

[0008]

[Operation] The laminated heat exchanger of the present invention having the above structure has the following features:
The plate header is positioned in the longitudinal direction by inserting the projecting piece of the side plate into the through hole provided in the plate header. In addition, when the protruding piece is inserted into the through hole and the outer circumferential surface of the plate header is in contact with the contact piece of the side plate, the tip of the protruding piece protruding from the through hole is plastically deformed, so that the side The plate header is positioned in the longitudinal direction of the plate, the plate header is fixed to the side plate, and the temporarily assembled state is maintained.

[0009]

[Embodiment] Next, an embodiment in which the laminated heat exchanger of the present invention is used as a refrigerant condenser will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing how the side plate and plate header are assembled, and FIG. 2 is a cross-sectional view showing where the side plate and plate header are assembled.

In the refrigerant condenser of this embodiment, tubes 1 and corrugated fins 2 are alternately stacked, side plates 3 are arranged on both outer sides of the tubes 1, and headers (described later) are installed at both ends of each tube 1. Manufactured by connecting and brazing together.

The tube 1 may be formed by extruding aluminum or by inserting inner fins into the tube 1.
They are each integrally brazed and each has a plurality of refrigerant passages (not shown) formed inside. The corrugated fin 2 is a roller-molded product made by processing a thin aluminum plate into a corrugated shape, and has a louver (not shown) formed on its surface to increase heat exchange efficiency.

The header is divided into two parts in the passage direction of the tube 1, with a plate header 4 forming the inner side and a tank header 5 forming the outer side, and a cylindrical body formed by combining the plate header 4 and the tank header 5. It is comprised of a cap 6 (see FIG. 2) that closes openings at both ends.

The plate header 4 is provided with elongated holes 4a (see FIG. 2) into which the ends of the tubes 1 are inserted, which are continuous at the same pitch in the longitudinal direction of the plate header 4. In addition, long holes 4a located at both ends of the plate header 4
A through hole 4 formed in the process of forming the elongated hole 4a is provided on the outside of the hole 4a.
b is provided.

The tank header 5 has a semicircular cross section,
A stepped portion 5a is formed at both ends in the circumferential direction, and the end portions of the plate header 4 are assembled inside the stepped portion 5a to form a cylinder. The inner circumferential surface of this cylindrical body is constituted by a smooth curved surface with no step at the joint between the plate header 4 and the tank header 5.

The cap 6 has a lid portion 6a formed at a constant depth, and is provided so that the lid portion 6a is fitted into the inner circumferential side of the cylindrical body and closes the opening of the cylindrical body without any gaps. It is being Therefore, the lid portion 6a has an outer shape that corresponds to the inner peripheral shape of the cylinder, and its outer peripheral surface is constituted by a smooth curved surface similar to the inner peripheral surface of the cylinder.

[0016] The side plate 3 has a thickness of 1.5 to 2.0 mm.
The corrugated fin 2 is press-molded to have a U-shaped cross section and is located at the outermost part of the core part (not shown).
is placed outside. At both ends of the side plate 3, a protruding piece 3a is inserted into a through hole 4b provided in the plate header 4, and when the protruding piece 3a is inserted into the through hole 4b, the outer peripheral surface of the plate header 4 is inserted into the through hole 4b. Two contact pieces 3b that come into contact with are provided.

The protruding piece 3a and the contact piece 3b are formed by providing two notches at the end of the side plate 3, and as shown in FIG. The middle part sandwiched between the notches is used as a protruding piece 3a,
The bent side portions are referred to as contact pieces 3b. Note that the bent length L1 of the contact piece 3b is the same as that of the side plate 3.
(See FIG. 3).

Next, the procedure for assembling the core of the refrigerant condenser will be briefly explained. Fins 2 and tubes 1 are alternately stacked on one side plate 3, and the other side plate 3 is stacked on top of the top fin 2 to form a core part.

Plate headers 4 are assembled on both sides of this core portion, and the fins 2, tubes 1, and side plates 3 are assembled.
to be fixed. Here, in the plate header 4, the projecting pieces 3a of each side plate 3 located at both ends of the plate header 4 are inserted into the respective through holes 4b provided at both ends of the plate header 4, and the plate header 4 is With the outer peripheral surface in contact with the contact piece 3b of the side plate 3, the tip of the protruding piece 3a protruding from the through hole 4b is caulked (
(see Fig. 2), and is assembled to the core part.

In this state, wire (not shown) is attached to the core part.
Wrap it around to hold the core shape. Thereafter, the tank header 5 is assembled to the plate header 4, and the stepped portion 5a of the tank header 5 is caulked to fix the tank header 5 to the plate header 4. After the cap 6, piping (not shown), etc. are assembled to the cylinder formed by the plate header 4 and the tank header 5, the respective brazing points are joined by integral brazing.

As described above, in this embodiment, when assembling the plate header 4 to the core part, the projecting piece 3a of the side plate 3 is inserted into the through hole 4b of the plate header 4, so that the plate header 4 will be restricted in its longitudinal movement. In addition, with the movement of the plate header 4 in the longitudinal direction restricted, the side plate 3
The movement of the plate header 4 in the longitudinal direction is restricted, and the plate header 4 is fixed to the side plate 3.

[0022] As a result, there is no need to use a jig until the brazing is complete during integral brazing, and compared to the conventional case where a jig was used, the number of man-hours involved in handling the jig is reduced. Since it can be omitted, workability is improved and productivity can be increased. Additionally, costs can be reduced by eliminating the need for jig costs.

[0023] By caulking and fixing the plate header 4 to the side plate 3, the bonding strength between the two can be improved.

Although the present embodiment shows the side plate 3 having a U-shaped cross section, the side plate 3 may have other cross-sectional shapes as shown in FIGS. 4 to 6. As shown in these modified examples, the cross-sectional shape of the side plate 3 is not restricted, so the degree of freedom in design is improved. In addition, although the refrigerant condenser was illustrated as an example of a laminated heat exchanger, it may be applied to a refrigerant evaporator, a radiator, a heater core, or the like.

[0025]

[Effects of the Invention] The laminated heat exchanger of the present invention has a self-jig function between the side plate and the plate header, so there is no need to use a jig until the brazing is completed. Therefore, it is possible to improve productivity and reduce costs. Moreover, the bonding strength between the side plate and the plate header after brazing can be improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an assembled state of a side plate and a plate header.

FIG. 2 is a cross-sectional view showing a location where a side plate and a plate header are assembled.

FIG. 3 is a perspective view of the end of the side plate.

FIG. 4 is a perspective view of an end of a side plate showing a modification of this embodiment.

FIG. 5 is a perspective view of an end of a side plate showing a modification of this embodiment.

FIG. 6 is a perspective view of an end of a side plate showing a modification of this embodiment.

FIG. 7 is an overall view of a conventional stacked heat exchanger.

[Explanation of symbols]

1 Tube 2 Fin 3 Side plate 3a　Protruding piece 3b Contact piece 4 Plate header 4b Through hole 5 Tank header 6 Cap

Claims (1)

[Claims] 1. Tubes forming fluid passages and heat radiation fins are alternately stacked, side plates are disposed on both outer sides in the stacking direction, and headers are connected to both ends of each tube, This header is divided into two parts in the passage direction of the tube, including a plate header on the inside and a tank header on the outside, and a cap that closes openings at both ends of a cylinder formed by combining the plate header and the tank header. In a laminated heat exchanger consisting of
Through-holes are formed at both ends of the plate header, and protruding pieces are formed at both ends of the side plate to be inserted into the through-holes when assembled with the plate header, and the protruding pieces are inserted into the through-holes when assembled with the plate header. A contact piece is provided that comes into contact with the outer peripheral surface of the plate header when inserted into the hole, and the protruding piece is arranged so that the outer peripheral surface of the plate header comes into contact with the contact piece after being inserted into the through hole. A laminated heat exchanger characterized in that, in a state in which the plate header is in contact with the plate header, a tip portion protruding from the through hole is plastically deformed to fix the plate header.