JPH04366397A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger having an excellent mounting operability of a bracket by easily conducting positioning or temporary fastening of the bracket without using a jig. CONSTITUTION:A heat exchanger in which a bracket 20 for mounting a heat exchanger body A, etc., is provided on the body A having at least one tube 1, is an object. A cutout tube engaging part 24 is formed on the bracket 20. The bracket 20 is mounted in a state that the part 24 is engaged with the tube 1.

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 brackets have been attached to the heat exchanger body by welding, brazing, etc., but the welding requires positioning and temporary fixing using a jig, making the work complicated. Moreover, the increase in man-hours caused an increase in costs. .

[0003] The present invention has been made in order to eliminate such drawbacks, and provides a heat exchanger that allows for easy positioning and temporary fixing of brackets without the use of jigs, and is excellent in workability for attaching brackets. The purpose is to provide.

0004

[Means for Solving the Problems] The above object is a heat exchanger according to the present invention, in which a heat exchanger body having at least one tube is provided with a bracket for attaching the body, etc., in which a cut is made in the bracket. This is achieved by a heat exchanger characterized in that a tube fitting part is formed in the shape of a shape, and a bracket is attached with the tube fitting part fitted into the tube.

[0005]

[Operation] The bracket can be temporarily fixed and positioned by fitting the notch of the bracket into the tube, thus eliminating the need for temporary fixing and positioning jigs.

[0006]

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

FIGS. 1 to 5 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. Note that an electric resistance welded tube may be used instead of the extruded shape. In this embodiment, the tube (1) is a porous tube such as a so-called harmonica tube, that is, a tube (1) as shown in FIG.
) is partitioned in the width direction by partition walls (1a) to form a plurality of refrigerant flow passages (1b) within the tube. The refrigerant flowing through the refrigerant flow path (1b) flows through the fins (2) formed between adjacent tubes.
) is used to exchange heat with the air flowing in the direction of arrow ing. This is due to the following reason. That is, tube (1)
Since the inside is divided into a plurality of refrigerant flow passages (1b),
The amount of refrigerant flowing through each flow path is small. Therefore, when the cross-sectional area of each flow passage is set to be the same, the refrigerant flowing through the flow passage on the windward side exchanges heat with fresh air and condenses quickly. The refrigerant flowing through the flow path is difficult to condense. This causes a difference in the degree of condensation in the width direction of the tube, resulting in non-uniform temperature distribution, which in turn causes a problem of reduced heat dissipation performance. Therefore, the passage cross-sectional area of the refrigerant flow passage (1b') on the windward side where condensation is more likely to occur is relatively increased to allow a large amount of refrigerant to flow, and the passage cross-sectional area is gradually reduced toward the leeward side where condensation is less likely to occur. By reducing the flow rate of the refrigerant and thereby uniformly condensing it throughout the width direction of the tube, the heat dissipation performance is improved. Note that the same result can be achieved even if only the passage cross-sectional area of the windward side refrigerant passage (1b') is set to be large, as shown in Fig. 6, without gradually decreasing the passage cross-sectional area of the refrigerant passage in the width direction of the tube. Effects can be obtained. In addition, in Figure 6, Figure 5
The same reference numerals are used for parts with the same names as those shown in
The explanation will be omitted.

[0008] The corrugated fin (2) is a tube (
It has approximately the same width as tube (1) and is joined to tube (1) by brazing. 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) are made of extruded aluminum profiles and are shown in Figure 1 as the upper brackets (20).
0), a holding piece (21) having a C-shaped cross section and an opening (21a);
) a flange piece (22) extending toward the tube at one end of the inner side; and a cross section extending protrudingly from the middle part of the holding piece (21) toward the front side in the width direction of the tube. L
A shaped mounting piece (23) is provided. In addition, the tsuba piece (
A cut-shaped tube fitting part (24) having a predetermined depth is provided on the edge of the tube 22) at the central part in the height direction. The tube fitting part (24) is provided for the purpose of temporarily assembling and positioning the bracket (20) by fitting the tube fitting part (24) into engagement with the tube (1). In this embodiment, the tube insertion part (2
The width (W) of the tube fitting part (24) is set to be slightly smaller than the thickness of the tube so that the tube (24) is forcibly inserted into the tube (1) and maintained in an immovable state. In addition,(
25) is a mounting hole provided in the mounting piece (23) for mounting on a vehicle body or the like.

[0011] The bracket (20) is attached to the heat exchanger main body (A) in the following manner. That is, the opening (21a) of the holding piece (21) is externally fitted into the right header (4), and the bracket (
20) in the width direction of the tube (1), as shown in Figure 5.
As shown in the figure, the inner part of the tube insertion part (24) is the tube (1).
) until it abuts and locks the tube fitting part (24).
) into the tube (1). In this way, by forcibly fitting the tube fitting part (24) into the tube until the inner part of the tube fitting part (24) abuts and locks with the end edge of the tube (1), the tube fitting part (24) is forcibly fitted to the tube (20). Further rotation is prevented, and the bracket is temporarily fixed at an appropriate position. After the bracket (20) is positioned and temporarily fixed in this way and assembled to the heat exchanger main body (A), bulk brazing is performed. The bracket (20) has a tube insertion part (
24) is fitted into the tube (1) and temporarily fixed, so there is no inconvenience that the bracket may move and cause dimensional deviations before brazing. Through this brazing, the header (3) that constitutes the heat exchanger body (A)
(4), the tube (1), the corrugated fin (2), etc. are joined, and at the same time, the bracket (20), the right header (4), and the tube (1) are joined. Incidentally, bulk brazing can be easily realized by using a brazing sheet as the header (3), (4) or further the tube (1).

[0012] The structure and mounting method of the lower bracket are also the same as those of the upper bracket, and their explanation will be omitted.

FIGS. 7 to 9 show other embodiments of the present invention. In this embodiment, a detent piece (26) protrudes outward in a direction perpendicular to the mounting piece (23) from the connecting part between the holding piece (21) and the collar piece (22) of the bracket (20).
is provided. When assembling the bracket, this anti-rotation piece (26) is locked to at least one tube (1) as shown in FIG.
) is working to further prevent rotation. Moreover, in this embodiment, the bifurcated collar piece (22) is formed long and thin, and after the tube fitting part (24) is fitted into the tube (1), the tip of the collar piece (22) is By caulking, the bracket (20) is attached to the outer circumferential surface of the header (4) as shown in FIG. 8, thereby completely preventing the bracket (20) from falling off from the heat exchanger body (A) in the temporarily assembled state. being done.

FIGS. 10 and 11 show still another embodiment. In this embodiment, when the bracket (20) is assembled, the collar piece (22) is arranged so that the tip of the bifurcated collar piece (22) protrudes beyond the width of the tube (1).
is formed into a slightly elongated shape. After fitting the tube fitting part (24) into the tube (1), the tube (1) is inserted into the tube (1).
), insert the tip of the collar piece (22) that protrudes beyond the tube (
It is fixed to the tube (1) by crimping it in the mutually approaching direction so as to wrap it around the tube (1). The height of the collar piece (22) is set small so that this caulking can be easily performed. In this way, by caulking the tip of the collar piece (22) to the tube (1), the bracket (20) is firmly fixed to the tube (1), and the bracket (20) is prevented from falling off until it is brazed. It also has a preventive effect.

In the embodiment shown in FIGS. 7 to 11, parts with the same names as those in the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the explanation thereof will be omitted.

[0016]

Effects of the Invention As described above, the present invention provides a heat exchanger in which a heat exchanger body having at least one tube is provided with a bracket for attaching the body, wherein the bracket has a notch for inserting the tube. is formed, and
This is characterized in that the bracket is attached with this notch fitted into the tube. Therefore, by fitting the notch of the bracket into the tube, the bracket can be temporarily fixed and positioned without the need for a jig, which simplifies the work of attaching the bracket to the heat exchanger body, and also Productivity can be improved by reducing the number of man-hours required to assemble the device.

[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 perspective view of the main parts after the bracket is attached.

5 is a sectional view taken along line V-V in FIG. 4. FIG.

FIG. 6 is a sectional view showing a modified example of the tube.

FIG. 7 shows another embodiment of the present invention, and is a perspective view of essential parts showing a state before the bracket is attached.

FIG. 8 is a perspective view of the main part after the bracket is attached.

9 is a sectional view taken along the line IX-IX in FIG. 8. FIG.

FIG. 10 shows still another embodiment of the present invention, and is a sectional view of a main part in a state before the bracket is attached.

[Figure 11] XI-XI in Figure 10 with the bracket attached
FIG.

[Explanation of symbols]

A..., heat exchanger body 3, 4...Header 1...Tube 20...Bracket 24...Tube insertion part

Claims (1)

[Claims] 1. A heat exchanger in which a heat exchanger body (A) having at least one tube (1) is provided with a bracket (20) for attaching the body, etc., in which a cut is made in the bracket (20). A heat exchanger characterized in that a tube fitting part (24) having a shape is formed, and a bracket (20) is attached with the tube fitting part (24) fitted into the tube (1). .