JPH0412369Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a heat exchanger for a vehicle used as a radiator for engine cooling water or a condenser for an air conditioner.

<Prior Art> For example, a conventional heat exchanger mounted on a vehicle as a condenser for an air conditioner has a configuration as shown in FIG. That is, the tubes 1 through which the refrigerant flows are formed by folding back in a meandering shape, and the cooling fins 2 are disposed between the tubes 1.
The folded portions are held and connected by a channel material 3 (reinforcing material) having a U-shaped cross section to provide longitudinal rigidity as a whole.

<Problems to be solved by the invention> In the conventional heat exchanger as mentioned above,
In a heat exchanger with a size of about 365 mm or 345 mm, the front and rear surfaces of the folded part of tube 1 were covered with channel material 3, which has a width of about 20 mm at the folded part. This has caused a problem in that the effective front area of the heat exchanger that contributes to heat exchange has been significantly reduced, making it impossible to obtain the desired heat exchange efficiency.

The present invention was devised in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a heat exchanger for a vehicle with excellent heat exchange efficiency.

<Means for Solving the Problems> In the vehicle heat exchanger of the present invention, the folded portions of the tubes formed in a meandering shape are held and connected by reinforcing materials, and the tubes are connected between adjacent straight pipe portions. A heat exchanger for a vehicle provided with cooling fins is characterized in that a folded portion of the tube is exposed and cooling fins are also provided on the inner and outer circumferential surfaces of the folded portion.

<Function> The folded part of the tube, which was conventionally covered by channel material, is also exposed, and cooling fins are also provided on the folded part, increasing the effective frontal area of the heat exchanger and reducing the flow resistance of cooling air. Achieve uniform heat exchange efficiency over the entire surface of the vessel.

<Example> An embodiment of the present invention will be described based on the drawings.

Fig. 1 is a perspective view showing a part of the capacitor of this example, Fig. 2 is an enlarged view of part A, and Fig. 3 is an enlarged view of part B.
It is an enlarged view of the part. The tube 12, which is formed by extrusion molding of aluminum and has a plurality of passages 11 through which the refrigerant flows, is folded back many times in a meandering manner, and the folded portions of the tube 12 located on both sides of the condenser 10 are The capacitor 10 is held and connected by a reinforcing material 13, and the capacitor 10 as a whole is given rigidity in the vertical direction. This reinforcing material 13 has a shape in which both bent portions of a conventional channel material are cut out, leaving only a portion, and the folded portion of the tube 12 is exposed from this notched portion, leaving a portion.
Then, the reinforcing material 13 corresponding to the remaining portion is
The bracket portion 13a is fixed to the folded portion of the remaining tube 12 through a grommet (not shown). It is preferable that the reinforcing material 13 is a plate-like material having a width comparable to the width of the tube 12 and also serves as a baffle plate to prevent cooling air from escaping to the sides of the capacitor 10. If a separate baffle plate is provided, the width may be smaller than the above width. Further, in this embodiment, a part of the reinforcing material 13 was left as the flange portion 13a, but the reinforcing material 13
If this flange part 13a is also removed by brazing, etc. to the side surface of the folded part of the tube 12,
The entire folded part can be exposed.

Corrugated cooling fins 14 made of aluminum are disposed between the tubes 12, and these cooling fins 14 are brazed to the tubes 12. Further, as shown in detail in FIGS. 2 and 3, cooling fins 15 are also disposed and brazed on the inner and outer peripheral surfaces of the folded portion of the tube 12 exposed as described above. These cooling fins 15 are lower in height than the cooling fins 14 disposed on the straight part of the tube 12 (other than the folded part), and cover the whole surface of the folded part and the straight part of the tube 12, that is, the core of the capacitor 10. The flow resistance of the cooling air is uniform. Note that if the cooling fins 15 are not provided at the folded portion of the tube 12, not only will the heat exchange efficiency of this folded portion be extremely reduced, but also the flow resistance of the cooling air at this folded portion will increase the flow resistance of the core. Since it is extremely small compared to other parts of the core, the amount of cooling air flowing to other parts of the core (the straight part of the tube) decreases, which deteriorates the heat exchange efficiency of the condenser 10 as a whole.

According to the capacitor 10 having the above configuration, the folded portion of the tube 12, which was conventionally covered with a channel material and did not contribute to heat exchange, can be made to effectively contribute to heat exchange. With this, for example, the height and width are 365mm,
Compared to the conventional capacitor 10, which is approximately 345 mm in size and uses a channel material with a bent part width of approximately 20 mm, the inventive one has an effective frontal area increased by approximately 13%, resulting in high heat exchange efficiency. can be obtained.

In the above embodiment, a corrugated type cooling fin was used as an example, but there is no limitation to the type of cooling fin, such as a plate fin type or a honeycomb fin type. The fins may be bent radially or the plate fans may be arranged radially.

Further, although the above embodiment has been described with respect to a condenser of an air conditioner, the same applies to a radiator of engine cooling water.

<Effects of the Invention> According to the vehicle heat exchanger of the present invention, the front effective area contributing to heat exchange can be expanded compared to the conventional one, and the heat exchange efficiency can be significantly improved. Therefore, if the heat exchange efficiency is the same, the size of the heat exchanger can be reduced, and in a vehicle where a wide variety of devices are mounted in a limited space, the arrangement of these devices can be facilitated. In particular, in the case of tandemly arranged condensers, since there is no U-shaped channel, there is no dead space in the front area for the flow, reducing pressure drop and increasing the air volume to the radiator at the rear of the flow, improving cooling performance. The negative effects of can also be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a capacitor as an embodiment of the present invention, Fig. 2 is an enlarged view of part A, Fig. 3 is an enlarged view of part B, and Fig. 4 is a perspective view of a conventional capacitor. . In the drawing, 10 is a capacitor, 12 is a tube,
13 is a reinforcing material, and 14 and 15 are cooling fins.

Claims (1)

[Scope of utility model registration request] In a heat exchanger for a vehicle, in which the folded portions of tubes formed in a meandering shape are held and connected by reinforcing materials, and cooling fins are arranged between adjacent straight pipe portions of the tubes, the folded portions of the tubes are exposed. 1. A heat exchanger for a vehicle, characterized in that cooling fins are provided on the inner peripheral surface and the outer peripheral surface of the folded portion.