JPH0384398A - Heat exchanger - Google Patents

Abstract

PURPOSE:To eliminate troublesomeness involved in the attaching operation of metal fittings by a method wherein a plurality of tubes and corrugated fins are alternately arranged and both ends of each tube are interconnected to a pair of hollow headers and at the outer circumferential parts of the headers attaching parts projecting outside are installed. CONSTITUTION:A brazing sheet 8 is shaped into a semi-finished product with a projecting part 15 which forms a bracket part 5at one side edge 12. Into the insertion holes for tubes in headers 3, 4 both ends of a tube 1 are inserted and corrugated fins 2 made of brazing sheets are arranged between adjacent tubes and at the outside of the most outside tubes and further at the outside of the most outside corrugated fins top and bottom side plates 22, 23 are arranged and in this condition soldering in a furnace is carried out to join mutually constituting components and both side edges 12 13 of the headers 3, 4 into one body. The bracket parts 5 for attaching an exchanger to a car body are installed at the headers 3, 4 by integral shaping and attaching operation of metal fittings is, therefore, unnecessary and its troublesomeness is completely eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a heat exchanger used in a car cooler condenser or the like, and particularly to a so-called header type heat exchanger.

Conventional technology For example, a so-called serpentine type condenser for car horns has been commonly used, in which a multi-hole flat tube called a harmonica tube is bent into a serpentine shape and fins are arranged between the parallel parts to form a core. A heat exchanger is used.

However, this serpentine heat exchanger has drawbacks such as the inability to ensure a large cross-sectional area of the passage because the heat exchange medium passage is formed by a single flat extruded tube.

Therefore, recently, as an alternative type of heat exchanger, a so-called header is constructed by alternately arranging a plurality of flat tubes and corrugated fins, and connecting both ends of each tube to a pair of hollow headers in a communicating state. This type of heat exchanger is now in the spotlight.

By the way, on the outer periphery of the header of this header type heat exchanger, there are various mounting brackets that can be used to attach the heat exchanger to the car body as a car rack condenser, or to attach accessory parts to the heat exchanger. It will be done. Considering that the header is simply a cylindrical tube, in order to be able to attach the metal fittings described above to the outer periphery of such a header, the metal fittings are attached to the base end of the bracket part of the header. It has a C-shaped holding part that holds the outer periphery of the holding part, and a pair of screw-fastening protrusions protruding from the tip of the drawing of this holding part. By fitting the fitting onto the outer circumference of the header from one side to the other and tightening the protruding pieces for both screw fixing with screws, the inner surface of the holding part is brought into pressure contact with the outer circumference of the header, thereby fixing the metal fittings to the outer circumference of the header. It was designed to be attached to the
(Refer to Publication No.-38481).

Problem to be Solved by the Invention However, since a large number of tubes are connected to one side of the outer periphery of the header, and the ends of the corrugated fins are located close to each other, the tubes and the corrugated fins are However, there is a problem in that the installation of the above-mentioned metal fittings becomes a considerable hindrance to the work, making it impossible to carry out the work smoothly.

An object of the present invention is to provide a heat exchanger that can eliminate the trouble associated with the conventional fitting work.

Means for Solving the Problems To achieve the above objects, the present invention provides a heat exchanger in which a plurality of tubes and corrugated fins are arranged alternately, and both ends of each tube are connected to a pair of hollow headers. The heat exchanger is characterized in that an outwardly protruding mounting section is integrally formed on the outer periphery of the header.

Function In the heat exchanger having the above configuration, the heat exchanger can be attached to the vehicle body etc. by using the mounting part integrally molded on the header.
Attach accessory parts, or attach metal fittings for mounting the vehicle body or accessory parts. Therefore, the troublesome work of attaching metal fittings as in the conventional method is eliminated.

EXAMPLES The following describes examples in which the heat exchanger of the present invention is applied to a condenser made of aluminum or its alloy for a car cooler.

In one embodiment shown in FIGS. 1 to 3, (1
)... are a plurality of tubes arranged vertically in a horizontal state, (2)... are the adjacent tubes (1) (1
) corrugated fins interposed between (3)
(4) is a pair of left and right hollow headers (17) connected to both ends of each tube, is an inlet pipe for the heat exchange medium, (18) is the same outlet pipe, (7)... is tube (1)... This is a partition plate that partitions the inside of the header (3) and (4) so that the heat exchange medium flows in a meandering manner through the flow path formed by the above. And (5)... is a bracket part for attaching the condenser to the vehicle body, and the mounting part constitutes the part.

The tubes (1) are constructed of flat extruded aluminum materials, and a porous type such as a so-called harmonica tube is preferably used. Note that as the tube (1)..., an electric resistance welded tube may be used instead of the extruded material.

The corrugated fins (2) are made of aluminum, have approximately the same width as the tubes (1), and preferably have louvers cut and raised on the wall surface.

For the headers (3) and (4), for example, a plating sheet (8) as shown in FIG. 4 is used, in which a core material made of aluminum is coated with a layer having an St content of about 6 13 on both sides. , this praising sheet (8
) is formed by molding and processing. That is, first, as shown in FIG.
) is bulged in a semi-circular cross-sectional shape by pressing along the length direction to form a bulge (9), and a shape that matches the shape of this bulge (9) is formed. As shown in FIG. 6, insert the tube insertion hole (1
0)... are arranged at intervals in the length direction using a press. This connects the tube insertion hole (10) to the header (3) (
4) To prevent crushing or deformation of the header when drilling the tube insertion hole (
10). Next, after performing surface punching as necessary, the bulging part (9) of the blazing sea (8) is
), the horizontal parts (11) and (11) on both sides are bent and formed into a U-shaped cross section as shown in Fig. 7 using a press. Form it into a round pipe shape while applying external force using a press so that it becomes . In addition, the above praising sheet (8
), in the state shown in Fig. 4, both edges in the width direction (1
2) Hit (1B) in the wall thickness direction with a hammer or press to form an inclined surface that gradually becomes thinner from the lower edge to the upper edge on one side edge and an upper edge on the other side edge. A sloped surface that gradually becomes thinner from the bottom edge toward the lower edge is formed, a brazing material layer is present on each sloped surface, and a large bonding area between both ends is ensured.

The bracket portion (5)..., as shown in FIG.
12) has a protrusion (15) constituting the bracket part (5), and this is molded into a plating sheet (8).
) is bent outward during the process of forming it into a cylindrical shape, so that it is integrally formed with the headers (3) and (4).

The heat exchanger is constructed by pushing both ends of the tubes (1) into the tube insertion holes (lO) of the headers (3) and (4), and by inserting a plate between adjacent tubes and on the outside of the outermost tube. Corrugated fins (2
)..., and then place upper and lower side plays (22) and (23) on the outside of the outermost corrugated fin, and in this state, furnace brazing is performed to bond each component to each other, and Both side edges (12) of header (3) (4)
(13) Completed by integrally joining them.

As mentioned above, the bracket part (5) for mounting on the car body...
By providing the headers (3) and (4) by integral molding, the conventional work of attaching metal fittings is completely unnecessary, and the troublesomeness thereof can be completely eliminated.

Furthermore, as mentioned above, in the past, metal fittings were attached to the outer periphery of the cylindrical header, so the metal fittings tended to shift when tightening with screws, so it was necessary to place the metal fittings in accurate positions. Although it was not always easy to do so, as in this example, the bracket part (5)... was connected to the header (3).
) (4) by integral molding, it becomes possible to reliably arrange the bracket parts (5) at accurate positions. In addition, when fitting metal fittings to the outer periphery of a cylindrical header as in the past, the metal fittings must have a complicated structure with holding parts, etc., and there is a concern that the cost will increase. However, in this embodiment, such a problem does not occur at all. Furthermore, since mounting as a separate component does not require any metal fittings, the number of heat exchanger components can be reduced, contributing to improved productivity.

In addition, in the above embodiment, the mounting part is explained as a bracket (5) for mounting the heat exchanger on the vehicle body, but other accessory parts are attached to the heat exchanger. It is also possible to use a bracket, etc. for mounting parts for mounting on the machine.

In the embodiment shown in FIG. 8, the mounting section is the header (3
0) is constituted by a rib (31) provided on the outer circumferential portion thereof over the entire length thereof. This rib (
31) uses a praising sheet that has extensions of a predetermined length on both sides as the praising sheet constituting the headers (3) and (4), and in the process of forming this praising sheet into a pipe shape, both of the above The extension part is bent outward, the palms are brought together, and the two parts are joined by brazing to be integrally formed with the header (3) and (4).

This rib (31) is provided with holes (32) for installation as appropriate, and for installation, the heat exchanger can be attached to the vehicle body using screws etc. using the holes (82) etc. It is possible to attach metal fittings to attach it to the vehicle body, or to attach fittings for attaching accessory parts. According to this embodiment, a tube (33) is used for mounting the vehicle body or for attaching accessories.
... is connected and the corrugated fin (34)...
can be attached to the rib (31) rather than to the adjacent header (30), so the attachment of the metal fittings can be done on the tube (33)... or corrugated fin (34)... This allows for smooth execution by avoiding interference with Furthermore, metal fittings that were conventionally considered difficult to attach to headers can be replaced with ribs (
31), installation is possible. In addition, since there is no need to form the metal fittings with a holding part for holding the header as in the past, the structure of the metal fittings can be simplified and the manufacturing cost thereof can be reduced. be able to.

Effects of the Invention As described above, in the heat exchanger of the present invention, the outwardly protruding mounting section is provided on the outer periphery of the header by integral molding. By using it for attaching to the vehicle body etc. and for attaching accessory parts, the work of attaching metal fittings as in the past becomes completely unnecessary, and the troublesomeness thereof can be completely eliminated. In addition, by using this mounting section to attach metal fittings such as those used for car body mounting or accessory parts mounting, it is possible to directly attach metal fittings to the outer periphery of a header where many tubes are connected as in the past. Compared to this, the installation of metal fittings can be carried out more easily.

[Brief explanation of drawings]

1 to 7 show an embodiment of the heat exchanger of the present invention, FIG. 1 is a perspective view showing the header, tubes, etc. in a separated state, FIG. 2 is a front view of the heat exchanger, Fig. 3 is a plan view of the heat exchanger, Fig. 4 is a cross-sectional perspective view of the plating sheet used for manufacturing the header, and Fig. 5 is a cross-section after forming the bulge on the plating sheet. A perspective view, FIG. 6 is a cross-sectional perspective view after drilling a tube insertion hole, and FIG. 7 is a cross-sectional perspective view after forming into a U-shaped cross section. FIG. 8 shows another embodiment of the present invention, and is a perspective view showing the header, tubes, etc. in two separated states. (1)...Tube, (2)...Corrugated fin, (3)(4)...Header (5)...Bracket part (installation part), (3()...Rib ( Installation is part) above 3 Konoshi Genitofin? Figure 1 JP-A-3-84398 (6)

Claims (1)

[Claims] In a heat exchanger in which a plurality of tubes and corrugated fins are arranged alternately and both ends of each tube are connected to a pair of hollow headers, an outwardly protruding attachment part is integrally molded on the outer periphery of the header. A heat exchanger characterized by being provided with.