JPH06300476A - Heat exchanger - Google Patents

Abstract

PURPOSE:To prevent damage to fin at its supporting bracket fixing part with a simple structure. CONSTITUTION:The end of a supporting bracket 6 projecting sideways from a base body is fixed to an upper side plate 51 of a heat exchanger. At a fixing part 4a, a pitch P1 between the corrugations of fins 4 in the uppermost tier joined to the side plate 51 is made smaller than a pitch P2 between those of the remaining fins 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to heat exchangers, and more particularly to improvements in their support structure.

[0002]

2. Description of the Related Art A multi-flow type heat exchanger is being widely used because of its excellent heat exchange efficiency. It is formed by laminating corrugated fins between a large number of flat tubes. By circulating the heat exchange fluid from the header to the tube, efficient heat exchange is possible with a compact size.

An example in which such a heat exchanger is used as a condenser is shown in FIG. 2, and the condenser having a rectangular shape has a large number of horizontally extending flat tubes 3 made of aluminum (aluminum) provided at equal intervals in the vertical direction. The tube 3 is, for example, a well-known porous harmonica tube.
Each tube 3 is made up of left and right aluminum tubular headers 1,
It is inserted into the side surface of No. 2 and communicates with the inside of the header.

A corrugated fin 4 formed by corrugating an aluminum brazing sheet is provided between the upper and lower tubes 3.
The upper and lower fins 4 are brazed and joined to each curved top portion, and the upper and lower fins 4 have a U-shaped cross-section side plate 51 whose upper or lower surface is bridged between the headers 1 and 2.
It is joined to 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.

In the condenser, the lower left and right positions of the lower side plate 52 are placed on a known vibration proof mount 53, and the left and right positions of the upper side plate 51 are held and fixed by a support bracket 6. This will be described with reference to FIG. 3. The support bracket 6 is composed of a long metal plate having a constant width, the base end of which is fixed to the vehicle body B, and a front end extending obliquely downward from this and an auxiliary plate 61 provided behind it. A U-shaped cross section is formed by, and the upper side plate 51 is held and fixed by a bolt 63 via a spacer 62.

[0007]

By the way, in the above mounting structure, the center of the capacitor is separated from the surface of the vehicle body by the 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 damaged at this portion.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchanger capable of preventing the fins from being damaged at the support bracket fixing portion with a simple structure.

[0009]

The structure of the present invention will be described. A plurality of tubes 3 are provided between the headers 1 and 2 arranged on the left and right at upper and lower intervals to allow a heat exchange fluid to flow therethrough. In a heat exchanger in which the corrugated fins 4 are jointly arranged between the tubes 3, and the uppermost and lowermost fins 4 are joined to the side plates 51 and 52 which are horizontally mounted between the headers 1 and 2. The front end of the support bracket 6 protruding laterally from the base B is fixed to at least one of the side plates 51 and 52, and is joined to the side plates 51 and 52 of this part at least at the support bracket fixing portion. The waveform pitch P1 of the fins 4 on the uppermost and lowermost stages is made smaller than the waveform pitch P2 of the remaining portion.

[0010]

In the above structure, the vertical movement of the heat exchanger causes
A moment is generated in the side plate 51 portion to which the projecting support bracket 6 is fixed.
Since the corrugated pitch P1 is made small, the number of joint points of the side plate 51 and the fin 4 per unit length is large, and has sufficient strength. Therefore, even if a large moment acts, there is no problem such as damage to the fin 4.

[0011]

1 is an enlarged view of a support bracket fixing portion to an upper side plate 51, which corresponds to the portion A in FIG. The front end of the long plate-shaped support bracket 6 having a constant width extending obliquely from above forms a holding portion having a U-shaped cross section that opens downward together with the auxiliary plate 61 on the back side, and the side plate 51 having a U-shaped cross section is formed by the holding portion. Hold and hold left and right bolts 6
It is fixed by 3.

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

Further, the plate thickness d1 of the fin 4 is also in the above range 4
In the case of "a", it is thicker than the plate thickness d2 outside this range 4b.

In such a structure, when the capacitor moves up and down due to vehicle vibration or the like, a large torsion moment M is generated in the fixed portion of the support bracket 6. put it here,
The fin 4 joined to the side plate 51 at this fixing portion
Indicates that the waveform pitch P1 is made small to increase the number of joints and the plate thickness d1 is made thick.
The load is dispersed, and each part of the fin 4 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 fixed portion of 1, the pitch may be changed.
Further, if there is a manufacturing difficulty, all of the uppermost fins may have a small pitch, or the plate thickness may be increased.

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

In the above embodiment, the case where the support bracket is fixed to the upper side plate has been described, but the same applies 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, with a simple structure, it is possible to effectively prevent the fins from being damaged at their supporting portions.

[Brief description of drawings]

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

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

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

[Explanation of symbols]

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

Claims (1)

[Claims] 1. A plurality of tubes for allowing a heat exchange fluid to flow therethrough are vertically provided between headers arranged on the left and right sides, and corrugated fins are jointly arranged between these tubes. In a heat exchanger formed by joining the upper and lowermost fins to a side plate extending horizontally between the headers, while fixing the tip of a support bracket projecting laterally from the base body to at least one of the side plates, A heat exchanger characterized in that, at least in the support bracket fixing portion, the corrugated pitch of the uppermost or lowermost fin joined to the side plate of this portion is made smaller than the corrugated pitch of other portions.