JP3301158B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly to an improvement in a support structure thereof.

[0002]

2. Description of the Related Art Due to advantages such as excellent heat exchange efficiency, a multi-flow type heat exchanger is being widely used, which is formed by laminating corrugated fins between a number of flat tubes. By allowing the heat exchange fluid to flow from the header into the tube, efficient heat exchange is possible with a compact size.

FIG. 2 shows an example in which such a heat exchanger is used as a condenser. A condenser having a rectangular shape has a number of horizontally extending aluminum flat tubes 3 provided at equal intervals in the vertical direction. The tube 3 is, for example, a known perforated harmonica tube.
Each tube 3 has an aluminum cylindrical header 1
2 and is connected to the inside of the header.

A corrugated fin 4 formed by corrugating an aluminum brazing sheet between the upper and lower tubes 3 is provided.
The uppermost and lowermost fins 4 are provided at the curved top portions by brazing and joined, and the upper and lower fins 4 are side plates 51,
52.

A heat exchange fluid such as a refrigerant supplied to one header 1 radiates heat through the fins 4 while flowing through the tube 3, and is discharged from the other header 2.

The left and right positions of the lower surface of the lower side plate 52 are mounted on a known anti-vibration mount 53, and the left and right positions of the upper side plate 51 are held and fixed by the support bracket 6. Referring to FIG. 3, the support bracket 6 is composed of a long metal plate having a fixed width, the base end of which is fixed to the vehicle body B, the front end extending obliquely downward therefrom and an auxiliary plate 61 provided behind the front end. A U-shaped cross section is formed, and the upper side plate 51 is held and fixed by bolts 63 via spacers 62.

[0007]

In the above mounting structure, the center of the capacitor is separated from the surface of the vehicle body B by a dimension L due to reasons such as mounting of the capacitor, and the support bracket 6 overhangs by the dimension L. ing. Therefore, when the capacitor moves up and down due to vehicle vibration or the like, a torsional moment M shown in the figure is generated in the fixed portion of the support bracket 6, and the relatively thin fin 4 may be broken at this portion.

An object of the present invention is to provide a heat exchanger capable of preventing breakage of a fin at a support bracket fixing portion with a simple structure.

[0009]

The structure of the present invention will be described. A plurality of tubes 3 for passing a heat exchange fluid are provided between headers 1 and 2 arranged on the left and right at intervals vertically. In a heat exchanger in which corrugated fins 4 are joined and arranged between tubes 3 and the uppermost and lowermost fins 4 are joined to side plates 51 and 52 laid between the headers 1 and 2. the tip of the support bracket 6 for supporting the heat exchanger is fixed to at least one of the side plates 51 and 52, the uppermost and lowermost are joined to the side plates 51 and 52 the fins 4, Range along the support bracket fixing part
4a, the waveform pitch P1 is along the support bracket non-fixed portion.
Range 4b as compared with the waveform pitch P2 of is obtained by <br/> so reduced.

[0010]

[Action] In the above configuration, the vertical movement of the heat exchanger,
While supporting lifting bracket 6 results in a moment fixed side plate 51 portion, since the fin 4 of this part are reducing the waveform pitch P1, the junction points of the side plate 51 and the fins 4 per unit length increases, It has sufficient strength. Therefore, even if a large moment acts, no problem such as breakage of the fins 4 occurs.

[0011]

FIG. 1 is an enlarged view of a portion for fixing a support bracket to an upper side plate 51 and corresponds to a portion A in FIG. The distal end of the long plate-like support bracket 6 reaching the diagonally upper portion forms a holding portion having a U-shaped cross section that opens downward together with the auxiliary plate 61 behind, and the side plate 51 having the U-shaped cross section is formed by the holding portion. Hold the left and right bolts 6
3 fixed.

Then, the uppermost corrugated fin 4 whose one top is brazed to the side plate 51 is joined.
Is a range 4a slightly wider than the plate width of the support bracket 6.
Therefore, the waveform pitch P1 is smaller than the waveform pitch P2 of 4b outside this range. Therefore, the number of brazing joints between the fins 4 and the side plates 51 per unit length is large in the above range.

The thickness d1 of the fin 4 is also in the range 4
In a, the thickness d2 is larger than the thickness d2 of 4b outside this range.

In such a structure, when the capacitor moves up and down due to vehicle vibration or the like, a large torsional moment M is generated at the fixed portion of the support bracket 6. put it here,
The fin 4 joined to the side plate 51 at this fixing portion
Is that the waveform pitch P1 is reduced to increase the number of joining points and the plate thickness d1 is increased.
Is dispersed, and each portion of the fin 4 also exhibits sufficient strength and is not damaged.

In the above embodiment, the support bracket 6
Although both the pitch and the plate thickness of the fins 4 are changed in the range 4a along the fixing portion, only the pitch may be changed.
Also, if there is difficulty in manufacturing may be thicker one stage all the thickness of the uppermost fin.

Increasing the plate thickness is effective not only for improving the rigidity but also for improving the heat radiation characteristics of the uppermost fin 4 which is in contact with one of the side plates 51.

In the above embodiment, the case where the support bracket is fixed to the upper side plate has been described, but the present invention can be similarly applied to the case where the lower side plate is supported by the support bracket.

[0018]

As described above, according to the heat exchanger of the present invention, it is possible to effectively prevent the breakage of the fin at the support portion with a simple structure.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a heat exchanger supporting portion showing one embodiment of the present invention, and is an enlarged view of a portion A in FIG.

FIG. 2 is an overall perspective view of a conventional heat exchanger.

FIG. 3 is an enlarged sectional view of a heat exchanger supporting portion.

[Explanation of symbols]

 1, 2 Header 3 Tube 4 Fin 51, 52 Side plate 6 Support bracket B Body (base)

Claims (1)

(57) [Claims] 1. A plurality of tubes through which a heat exchange fluid flows are provided between headers disposed on the left and right at intervals above and below, and fins formed in a corrugated shape are joined and disposed between the tubes. In a heat exchanger in which the upper and lower fins are joined to a side plate laid between the headers, a tip of a support bracket for supporting the heat exchanger is fixed to at least one of the side plates. The uppermost or lowermost fins, which are joined to the side plate,
Range waveform pitch is along the support bracket unfixed portion
A heat exchanger characterized in that the pitch is smaller than a range of waveform pitches.