JPH04288488A - Metallic heat exchanger - Google Patents

Abstract

PURPOSE:To avoid a tube from damage due to a clamping member by eliminating the penetration of the clamping member through the gap between the tubes to mount a bracket. CONSTITUTION:A pedestal member 9 made of an aluminum brazing sheet is brazed integrally to the core of a heat exchanger while a bracket 10 for attaching to a car body is attached to said pedestal member 9 through a clamping member 20.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger made of metal such as aluminum and used as a condenser for a car cooler, a heat exchanger for a room air conditioner, and the like.

0002

[Prior Art] In recent years, there has been a tendency for aluminum heat exchangers, so-called multi-flow type, to be used favorably as condensers for car coolers, for example, because they can achieve high heat exchange performance and low pressure loss. be. This multi-flow heat exchanger generally has a pair of hollow headers connected to both ends of multiple tubes arranged in parallel at predetermined intervals, with fins interposed between the tubes. being done. In the heat exchanger, various mounting fittings such as brackets used for mounting on the vehicle body side and brackets for supporting piping are generally attached to the heat exchanger core made of tubes and fins. There is.

[0003] Conventionally, when attaching the fitting to the heat exchanger core, a pair of metal plates disposed at the front and rear of the heat exchanger core are attached through the gap between the tubes. This was done by fastening with a fastening member such as a threaded bolt.

0004

However, with the above-described mounting structure, there is a risk that the fastening member may hit the tube and cause damage such as scratches to the tube. especially,
In the multi-flow type heat exchanger as mentioned above, the tube pitch tends to be designed to be very narrow, for example, 10 mm, and as the tubes become thinner, there is a risk of damage to the tubes due to fastening members. Sexuality was becoming increasingly high.

[0005] An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a heat exchanger having a structure in which mounting fittings are attached to the heat exchanger core in a manner that does not damage the tubes. .

[0006]

[Means for Solving the Problems] To achieve the above object, the present invention provides a heat exchanger core in which heat exchange tube portions and fins are alternately arranged, and a mounting bracket is integrally joined by brazing. The gist is a metal heat exchanger that is characterized by:

[0007] The term "mounting fittings" refers to a bracket for attaching the heat exchanger body to the mounting side of a vehicle body, a bracket for supporting the intermediate part of the heat exchange medium inlet pipe, the outlet pipe, etc. Alternatively, the term "bracket" is used to include a pedestal member for attaching these brackets to the heat exchanger body.

[0008]

[Operation] In the above configuration, the mounting bracket is integrally joined to the heat exchanger core by brazing, so that
There is no risk of damaging the heat exchange tubes, unlike when using fastening members.

[0009]

[Embodiment] Next, an embodiment in which the heat exchanger of the present invention is applied to a multi-flow heat exchanger for a car cooler condenser will be described. In addition, the present invention relates to a heat exchanger for a room air conditioner,
It goes without saying that it can be widely applied to various types of heat exchangers with headers, such as oil coolers, and so-called serpentine-type heat exchangers, in which the core is formed by bending a tube into a meandering shape. Nor.

In the heat exchanger shown in FIGS. 2(a) and 2(b), (1) is a flat tube, and (2) is a corrugated fin, which are arranged in parallel and alternately in the vertical direction. (3) is an aluminum side plate,
It is placed on the outside of the outermost corrugated fin (2) to protect the fin. (4) (4) is a pair of left and right headers, which are connected to the tube (1) in a communicating state. (6) is a refrigerant inlet pipe located on the outer surface of the upper end of the left header (4), and (7) is the right header (4).
This is the outlet pipe located on the outer surface of the lower end of the (8)
is an aluminum partition plate that partitions the inside of the header (4) so that the refrigerant flows in a meandering manner through the group of tubes (1). And (9) is a pedestal member as a mounting metal fitting, and as shown in Fig. 1, a bracket (10) for attaching the heat exchanger main body to the vehicle body is attached to the pedestal member (9). It is said that

The flat tube (1) is made of an extruded aluminum material, and is a so-called harmonica tube whose interior is divided into a plurality of chambers by partition walls and whose heat transfer performance is improved. Note that an electric resistance welded tube may be used instead of the extruded material.

[0012] The corrugated fin (2) has a tube (1
It is manufactured by molding a sheet material with approximately the same width as the width of the brazing material into a corrugated shape, and this sheet material is an aluminum brazing sheet clad with a brazing material layer.

The header (4) is a cylindrical header pipe formed by molding an aluminum brazing sheet clad with a brazing material layer on one or both sides so that both edges butt each other to form a pipe shape.The end opening of the header pipe is made of aluminum. It is closed with a header cap. Note that an extruded material, an electric resistance welded tube, or the like may be used as the header. Although not shown, tube insertion holes in the form of circumferential slits are arranged in rows at predetermined intervals in the length direction on the inner surface of the header (4).

The pedestal member (9) is manufactured by press-forming an aluminum brazing sheet clad with a brazing metal layer on one side with the brazing metal layer facing inside, as shown in Fig. 1 (A). As shown in (b), a downward U-shaped fitting part (11) and an upwardly protruding mounting part (12) formed by folding back on the upper surface of the fitting part (11).
It is considered to have the following. A pair of left and right mounting holes (13) (13) for mounting the bracket (10) are formed in the mounting portion (12). These mounting holes (13) (13) are connected to the bracket (10
The mounting hole (14) is formed larger than the mounting hole (14) on the ) side, so that the degree of freedom in the mounting position of the bracket (14) is ensured. In addition, both sides (1) of the fitting part (11)
1a), openings (15) (15) are formed corresponding to the positions of the fins (2).

[0015] The bracket (10) for mounting on the vehicle body is
It has a downward U-shaped fitting part (17) and an upwardly projecting mounting part (18), and is formed by press forming a metal plate. The metal used for this is iron or aluminum.

Each of the heat exchanger components except for the bracket (10) has a plurality of tubes (1) arranged in parallel at predetermined intervals in the thickness direction, and headers (4) are arranged at both ends of the tubes (1). ) (4) by inserting the tube (1) into the tube insertion hole, inserting the corrugated fin (2) between the tubes (1), arranging the side plate (3), etc., and attaching the pedestal member. By fitting and arranging the fitting part (11) of (9) on the heat exchanger core from the side plate (3) side, it is assembled into a heat exchanger assembly, and this assembly is placed in a brazing furnace. By passing the base member (9) through the heat exchanger core, the entire body including the joint between the pedestal member (9) and the heat exchanger core is integrated by brazing, and the heat exchanger is manufactured.

As mentioned above, the fitting portion (
11) is provided with an opening (15) in the side part (11a), so that heat during brazing is well conducted to the inside of the fitting part (11) through the opening (15). , brazing is well achieved.

Then, as shown in FIG. 1(b), a bracket (10) for attachment to the vehicle body is attached to the base member (9) of the heat exchanger using a fastening member (20).

[0019] With the above structure, it is not necessary to insert the fastening member through the gap between the tubes (1), so it is possible to avoid a situation where the tube (1) is damaged by the fastening member.

Moreover, the pedestal member (9) is brazed to the heat exchanger core, and the bracket (10) is attached to this pedestal member (9).
By having a structure for attaching the bracket (
10) It is very advantageous in terms of strength retention.

The embodiment shown in FIGS. 3(a) and 3(b) is as follows:
A pedestal member (9) to be brazed to the heat exchanger core is formed to have only a downward U-shaped fitting portion (11). In this case, the bracket (10) for mounting on the vehicle body is attached to the bent side (10) as shown in the figure.
0a) is attached to the upper surface of the fitting portion (11) of the base member (9) using the fastening member (20). If the length of the fastening member (20) is regulated, there is no need to worry about the tip of the fastening member (20) hitting the tube (1) as shown in the figure.

In the embodiment shown in FIG. 4, the pedestal member (9) to be brazed to the heat exchanger core has a U-shaped fitting portion (
A rising mounting portion (12) is integrally molded adjacent to one side portion of 11).

Further, in the embodiment shown in FIGS. 5(a) and 5(b), a recess (22) of a predetermined length is formed in the middle part of the side plate (3) by bending. A U-shaped pedestal member (9) having a mounting hole (13) on the side portion is fitted to the core side and brazed to the core side corresponding to the position of the base member (9). With this configuration, the height position at which the bracket for mounting on the vehicle body is attached to the pedestal member (9) can be lowered, and the core can be expanded accordingly, contributing to improved performance of the heat exchanger.

The embodiment shown in FIGS. 6(a) and 6(b) is as follows:
A pedestal member (9) to be brazed to the heat exchanger core is formed to have a structure in which an L-shaped core attachment part (11) and an upwardly protruding bracket attachment part (12) are connected. Attach the fitting hexagonal part of the refrigerant outlet or inlet piping (6) (7) to the bracket mounting part (12).
A mounting bracket (23) made of an aluminum brazing sheet that supports the heat exchanger core (25) is attached with a fastening member (20), and the pedestal member (9), the heat exchanger core, and the pedestal member (
9) and the bracket (23), and the bracket (23) and the fitting hexagonal part (25) are brazed to each other. Note that the fitting hexagonal part (25
), each corner on the proximal end side is machined into a rounded shape by cutting leaving a flat part to form an abutting part (25a) facing toward the proximal end, while the bracket The concave fitting part (24) of the pipe attachment part (24) of (23)
The bottom shape of the fitting hexagonal part (25) matches the outer peripheral shape of the cut part (25b) of the fitting hexagonal part (25). Therefore, when brazing, as shown in the figure,
The cut part (25b) of the hexagonal part (25) of the fitting is placed in the concave fitting part (24a) of the bracket (23), and the tip of the fitting and the bracket (23) are held together with the jig (27). By making the state
The pipes (6) and (7) can be held in a positioned and non-rotating state, and brazing can be performed in a properly arranged state.

The embodiment shown in FIG. 7 is a modification of the embodiment shown in FIG. 6, in which the pipe mounting bracket (30) is
The mounting hardware in the present invention is directly brazed to the heat exchanger core.

[0026]

Effects of the Invention As described above, in the metal heat exchanger of the present invention, the mounting fittings are integrally joined by brazing to the heat exchanger core in which the heat exchange tube portions and the fins are arranged alternately. 2, it is possible to eliminate the risk of damage to the heat exchange tube portion as in the case of the conventional mounting structure of the mounting fittings using fastening members.

[Brief explanation of the drawing]

[Fig. 1] Shows one embodiment; Figure (A) is a front view showing a state in which a pedestal member is placed in a heat exchanger core, and Figure (B) is a cross-sectional view taken along the line I-I in Figure (A). It is a diagram.

FIG. 2: Figure (A) is an overall front view of the heat exchanger, and Figure (B) is an overall plan view.

[Fig. 3] Fig. 3 shows another embodiment, in which Fig. (a) is a front view showing the state in which the pedestal member is arranged in the heat exchanger core, and Fig. (b)
is a cross-sectional view taken along the line III-III in Figure (A).

FIG. 4 shows still another embodiment, and is a perspective view showing a state in which a pedestal member is placed in a heat exchanger core.

FIG. 5 shows still another embodiment, and FIG.
B) is a cross-sectional view taken along the line V-V in Figure (A).

[Fig. 6] This shows still another embodiment, in which Figure (A) is a sectional view showing the state in which the pedestal member to which the pipe mounting bracket is fastened is placed in the heat exchanger core, and Figure (B) is a cross-sectional view showing the state in which the pedestal member to which the pipe mounting bracket is fastened is arranged in the heat exchanger core. FIG. 3 is a front view of the bracket in a supported state.

FIG. 7 shows still another embodiment, and is a sectional view showing a state in which a pipe mounting bracket is arranged on a heat exchanger core.

[Explanation of symbols]

1...Flat tube (heat exchange tube part) 2...Fin 9...Pedestal member (mounting metal fittings) 30...Bracket (mounting metal fittings)

Claims (1)

[Claims] 1. A metal heat exchanger characterized in that a mounting bracket is integrally joined by brazing to a heat exchanger core in which heat exchange tube portions and fins are arranged alternately.