JPH04353396A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger, prominent in the workability of mounting between a header and a bracket and having no possibility of danger of damaging a tube or the like upon mounting a bracket. CONSTITUTION:The hollow header of a heat exchanger main body A, having at least one piece of hollow headers 3, 4, is provided with a screw retaining member. Female screw members 24, provided so as to penetrate the wall surfaces of the headers 3, 4 and recessed inwardly, or male screw member 30, provided so as to penetrate the headers 3, 4 radially, are employed as the screw retaining member. A bracket 20 for mounting the main body of heat exchanger or the like is fixed to the headers 3, 4 through screw retaining by the screw retaining members.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a heat exchanger used in a car cooler condenser or the like.

0002

BACKGROUND OF THE INVENTION Brackets are used for heat exchangers used in the above-mentioned applications, etc., to attach them to vehicle bodies, etc., or for other purposes. Conventionally, such a bracket has been used as a plate-shaped bracket formed by press working, and this bracket is attached to the heat exchanger main body. In so-called multi-flow type heat exchangers in which tubes are connected in communication with a hollow header, brackets are attached to the header by spot welding or the like.

However, when attaching a plate-shaped bracket to a header by spot welding or the like, positioning and temporary fixing of the bracket during welding and fixing are troublesome.

As shown in FIGS. 11 and 12, a bracket (100) is attached to a holding piece (101) having an inverted C-shaped cross section that fits around the outer periphery of the header, and tubes (102) extending from both ends of the holding piece. A pair of holding pieces (103) (103) extending parallel to the ) direction, and a holding piece (101)
The holding piece (101) is externally fitted to the header (105), and the core part of the heat exchanger body (106) is attached to both sides. The clamping pieces (103) (103) are used to hold the clamping pieces (103) (103), and the clamping pieces (103) (103) are held together by screws (107) such as bolts passing through these clamping pieces and the core part.
) to the clamping pressure state, and then attach the bracket (100
) has also been proposed to be attached to the heat exchanger body (106) (for example, Utility Model Application No. 38481/1981).

However, in this case, since the screw (107) is inserted through the heat exchanger core, there is a risk that the tube (102) etc. may be damaged due to contact with the screw.

The present invention has been made in view of the above technical background, and an object of the present invention is to provide a heat exchanger which has excellent workability in attaching a header and a bracket, and which is free from the risk of damage to tubes, etc. when attaching the brackets. purpose.

[0007]

[Means for Solving the Problems] According to the present invention, the hollow header of a heat exchanger body having at least one hollow header is provided with a screwing member, and the screwing member is provided with a screwing member. This is achieved by a heat exchanger characterized in that a bracket for attaching the heat exchanger body is fixed to the header with screws. Here, examples of the screwing member include a female screw member provided in an inwardly convex shape passing through the wall surface of the header, and a screw insertion member provided passing through the header in the diametrical direction.

[0008]

[Operation] Since the bracket is fixed to the header with screws, the bracket can be easily attached to the heat exchanger body without the need for positioning or temporary fixing. Furthermore, since the bracket can be directly attached to the header, there is no need to insert screws through the heat exchanger core to attach the bracket.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a heat exchanger made of aluminum (including alloys thereof) for a car cooler according to an embodiment of the present invention. In these figures, (A) is the heat exchanger main body, and the main body includes a plurality of tubes (1) arranged vertically in a horizontal state, and adjacent tubes (1).
(1) has corrugated fins (2) interposed between them. The tube (1) is made of a flat extruded aluminum member. This tube (1) may be of a porous type, so-called a harmonica tube. Moreover, an electric resistance welded tube may be used instead of the extruded shape. The corrugated fin (2) has approximately the same width as the tube (1), and is attached to the tube (1) by brazing.
is joined to. The corrugated fins (2) are also made of aluminum, preferably with louvers cut and raised.

(3) and (4) are left and right headers. These headers (3) and (4) are each formed from one aluminum electric resistance welded tube having a circular cross section. In each header (3) (4), tube insertion holes are bored at intervals along the length direction, and both ends of each tube (1) are inserted into the holes, and firmly secured by brazing. Connected by joints. Further, a refrigerant inlet pipe (6) is connected to the upper end of the left header (3), and a refrigerant outlet pipe (7) is connected to the lower end of the right header (4). Also, the bottom end of the left header (3) and the top end of the right header (4) have lid pieces (8
) and (9) are attached respectively. Furthermore, the position above the center of the left header (3) and the right header (4)
A partition plate (10) is provided at a position below the center of each header, and each header is partitioned into two chambers. By installing such a partition plate (10), the refrigerant inlet pipe (6)
The refrigerant flowing into the left header (3) flows in a meandering manner around the entire passage constituted by the tube group, and flows out from the refrigerant outlet pipe (7). Note that (11) and (12) shown in FIG. 2 are upper and lower side plates arranged outside the outermost corrugated fin (2).

Aluminum brackets (20) (20) for mounting the heat exchanger main body (A) are attached to the upper end of the right header (4) and the lower end of the left header (3). These brackets (20) (20) are shown in FIG.
As shown in the example of the bracket on the right side, the longitudinal main body (21) has an arcuate cross-section along the outer periphery of the header (4).
and an outwardly projecting mounting piece (22) integrally formed on the upper and lower ends of the main body (21), and a mounting hole (23) is formed in the mounting piece (21). The bracket (20) is attached to the header (4) in the following manner. That is, as shown in FIGS. 1 and 4, at the planned mounting position of the bracket, the header (4) has two cap nut-shaped screws that penetrate the peripheral wall of the header and are spaced apart in the length direction. An aluminum internal threaded member (24) is attached to the header so as to protrude inside the header. This female thread member (24) is connected to the header (4
) After fitting into the through hole drilled in the wall surface and temporarily fixed by caulking etc., the tube (1), fin (2),
The headers (3) and (4) are brazed together with the headers (3) and (4) at the same time. Such brazing can be easily achieved by using a brazing sheet as the headers (3) and (4). After brazing, the externally threaded members (25) such as screws are inserted into the internally threaded member (25) by passing through the bracket (20).
4) and screw together, the bracket (20
) is fixed to the header (4) with screws.

[0013] Note that the left header (3) of the left bracket
) was also installed in the same manner as above, and its explanation will be omitted.

[0014] As described above, since the bracket (20) is screwed onto the headers (3) and (4) using the internal thread members (24), the inside of the tubes (1) and (1) There is no need to insert screws or bolts into the fin intervening space, and the risk of their contact with the tube or fin is eliminated.

[0015] In this embodiment, the female thread member (24)
Although we used a cap nut shape as a cap nut, by applying a sealant etc. to the threaded part without using a cap nut shape, the male threaded part (
25) and the female screw member (24) can be sufficiently airtight to ensure this, and no leakage of the heat exchange medium will occur. However, by using a bag-like shape with a bottom, the risk of leakage of the heat exchange medium is further reduced.

FIGS. 5 and 6 show a modification of the manner in which the female thread member (24) is attached to the header. In this example, the female screw member insertion hole (26) provided in the header (4) is
) is formed with a conical recess (26a). The flange portion (24a) of the female threaded member (24) is housed in the recess (26a), so that the outer peripheral surface of the header and the end surface of the female threaded member (24) are flush with each other. By doing this, the back surface of the bracket (20) along the header (4) comes into contact with the outer surface of the header (4), so the bracket (20) and header (4) are brazed on that contact surface.
This makes it possible to further improve the mounting strength of the bracket (20) to the header (4), and furthermore, when the heat exchanger is mounted on a vehicle body, etc., it is possible to create a heat exchanger with excellent durability that will not easily come off due to vibrations, etc. It can be used as an exchanger.

FIGS. 7 and 8 show other embodiments. In this embodiment, female thread members (2
4) (24) are provided, and these internally threaded members (24)
(24) is a channel-shaped bracket (2) with a U-shaped cross section.
0) are screwed together. In this way, by providing the female thread members (24) on both sides of the header (4) in the diametrical direction, the mounting strength of the bracket (20) is improved compared to the case where the female thread members (24) are provided only on one side in the radial direction. It has the advantage that it can be attached reliably and firmly even if it is present.

In the above embodiments, the female screw member (24) was provided on the peripheral wall of the header (4), but a cover piece (8) closing the end of the header (4) was shown.
) (9) may be provided in a penetrating manner. In addition, although a structure has been shown in which a female thread member (24) is provided as a screwing member on the header and a male thread member is screwed into this female thread member to screw the bracket (20), a male thread member is provided on the header and this A structure in which a female thread member is screwed onto a male thread member from the outside may be adopted.

FIGS. 9 and 10 show still another embodiment of the present invention. In this embodiment, a cylindrical screw insertion member (30) is provided as a screw fixing member that diametrically penetrates the header (4) in the thickness direction of the heat exchanger main body (A). This screw insertion member (30)
is made of aluminum, and is brazed to the header (4) to maintain the airtightness of the contact portion of the insertion member (30) to the header (4). This insertion member (3
A pair of clamping pieces (20a) (20a) of a channel-shaped bracket (20) with a U-shaped cross section are placed on both sides of the bracket (20a).
The bracket (20) is attached to the header (4). In such a configuration, since the screw insertion member (30) is provided so as to pass through the header, even if a large load is applied to the bracket, the screw insertion member (30) can sufficiently withstand this load, thereby making it easier to install the bracket. This has the effect of improving strength and durability.

In the embodiment shown in FIGS. 5 to 10, parts with the same names as those in the embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and the explanation thereof will be omitted.

[0021]

Effects of the Invention According to the present invention, a screw-fastening member is provided on the hollow header of a heat exchanger main body having at least one hollow header, and the heat exchanger body is provided with a screw-fastening member. Since the bracket for mounting the heat exchanger body is fixed to the header with screws, the bracket can be easily attached to the heat exchanger body without the need for positioning or temporary fixing, making the installation process easier. can improve sexual performance. Moreover,
Since the brackets can be attached directly to the header, there is no need to insert screws through the heat exchanger core to attach the brackets, avoiding the risk of damage to tubes etc. due to contact with the screws, and increasing durability. Get an excellent high quality heat exchanger.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of the bracket before it is attached to the heat exchanger main body.

FIG. 2 is a front view of a heat exchanger according to an embodiment of the present invention.

FIG. 3 is a plan view as well.

FIG. 4 is a cross-sectional view of the female screw member attached to the header.

FIG. 5 is a sectional view of a main part showing a modification of the manner in which the screw member is attached to the header.

FIG. 6 is a cross-sectional view of a main part of the bracket attached using the female thread member of FIG. 5;

FIG. 7 shows another embodiment of the present invention, and is a front view of main parts showing a state in which the bracket is attached.

FIG. 8 is a plan view as well.

FIG. 9 shows still another embodiment of the present invention, and is a sectional view of a main part in a state where a screw insertion member as a screw fixing member is attached to a header.

FIG. 10 is a sectional view of a main part with a bracket attached.

FIG. 11 is a perspective view of main parts of a conventional heat exchanger.

FIG. 12 is a plan view thereof as well.

[Explanation of symbols]

A..., heat exchanger body 3, 4...Header 20...Bracket 24...Female thread member (screw fixing member)

Claims (3)

[Claims] [Claim 1] At least one hollow header (3)
A screw-fastening member is provided on the hollow header of the heat exchanger main body (A) having (4), and the bracket (20) for attaching the heat exchanger main body is attached to the header (3) by this screw-fastening member. )(4) A heat exchanger characterized by being fixed to (4) with screws. [Claim 2] The screwing members are headers (3) (4).
) is an internally threaded member (
24) The heat exchanger according to claim 1. [Claim 3] The screwing members are headers (3) (4).
) is provided through the screw insertion member (30
) The heat exchanger according to claim 1.