JPH0645158Y2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a parel flow type heat exchanger in which a header pipe is divided in a longitudinal direction.

(Prior Art) Conventionally, as a parallel flow type heat exchanger such as a radiator, it is known that the front shape is formed into a non-rectangular shape or the like and the header pipe is divided in the longitudinal direction due to the installation space. (For example, Japanese Utility Model Application Sho 63-5859)
No. 6).

In this type of heat exchanger 1, a plurality of flat tubes 2 are laminated in parallel with each other via corrugated fins 3 as shown schematically in FIG. 7, and these flat tubes 2 are arranged on the right end side in the figure. While one middle header pipe 5 is connected, a header pipe divided into two in the longitudinal direction is connected to the inlet header pipe 4 and the outlet header pipe 6 on the left end side in the figure. In addition, the upper and lower ends of the intermediate header pipe 5,
Upper end of inlet header pipe 4 and outlet header pipe 6
Blind caps 7 are provided at the lower end of each of these, and these openings are closed. As shown in FIG. 8, blind caps 8 and 9 are also provided at the split ends of the inlet header pipe 4 and the outlet header pipe 6, respectively, and these openings are closed. Further, the inlet side header pipe 4 has an inlet joint 10
The outlet joint 11 is attached to the outlet header pipe 6, and the refrigerant flows from the inlet joint 10 to the inlet header pipe 4, the intermediate header pipe 5 and the outlet header pipe 6 through the flat tube 2. It has a structure that meanders and flows out from the outlet joint 11.

(Problems to be solved by the invention) However, in the above-mentioned parallel flow type heat exchanger, since the header pipes are divided in the longitudinal direction, the divided header pipes are joined to each other only by the tubes and the fins. It is extremely weak in strength,
There was a risk that it would be easily affected by vibration and the like. Regarding this point, as described in, for example, Japanese Patent Application Laid-Open No. 63-75486, there is known a structure in which reinforcement is performed by interposing a connecting tube, but in this case, cooling water is not used. Since it is limited to the place through which it flows, it was possible to reinforce only a very limited part.

(Means for Solving the Problem) In the heat exchanger of the present invention, header pipes are connected to both ends of a plurality of parallel tubes, and at least one header pipe is divided into at least two members in the longitudinal direction. In parallel flow type heat exchanger,
The blind caps provided at the respective divided ends of the divided header pipe are integrally formed. Here, the wording "integrally formed" means that both blind caps are integrally molded by one member, and both blind caps by separate members are formed by appropriate members, as described in Examples below. It is used to include both joining.

(Operation) Therefore, since the blind caps at the respective divided ends are integrally formed, the strength of the divided header pipe can be improved and the number of parts can be reduced.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. still,
In the present embodiment, the same parts as those in the conventional example are designated by the same reference numerals, and duplicate description will be omitted.

The heat exchanger 21 of the present embodiment is configured as a parallel flow type in which a plurality of flat tubes 2 are arranged in parallel with each other, as shown in a schematic front view of FIG. On the left end side of the drawing in FIG. 2, a header pipe divided into two in the longitudinal direction is connected to an inlet header pipe 4 and an outlet header pipe 6.

Further, as shown in FIGS. 2 and 3, blind caps 8 and 9 which are fitted inside the end openings are provided at the respective divided ends of the inlet header pipe 4 and the outlet header pipe 6. The blind caps 8 and 9 are integrally joined together by a plate-shaped joint portion 22 by integral molding. Further, the joint portion 22 is provided with a plurality of ridge-shaped bulging portions 23 having a triangular cross section shown in FIG. 4 (a) or a semicircular cross section shown in FIG. 4 (b) along the longitudinal direction. And the rigidity of the joint portion 22 is increased.

In such a heat exchanger 21, the blind caps 8 provided at the split ends of the header pipes 4 and 6 which are split.
Since and 9 are integrally joined by the joint portion 22,
Both of the divided header pipes 8 and 9 are integrally connected, the strength of both the header pipes 8 and 9 can be ensured, and the structure can sufficiently withstand the influence of vibration or the like. Further, since both blind caps 8 and 9 are integrally molded, they become one part and the number of parts can be reduced.

Next, another embodiment of the present invention will be described with reference to FIGS.

In the present embodiment, as shown in both figures, the divided end portions of the divided header pipes 4 and 6 are provided with blind caps 24 and 25 which fit outside the end openings. In addition, in one blind cap 24 fitted upward to the divided ends of the header pipes 8 and 9, the lubricating oil should not collect near the opening of the upper tube 2 adjacent to the blind cap 24. A protrusion 24a for preventing oil accumulation is formed. The other blind cap 25 is formed to have a predetermined length so that its head portion 25a can contact the tube 2 located above. Further, both blind caps 24 and 25 are integrally joined by a joint portion 22 having a ridge-shaped bulging portion 23, as in the above embodiment.

Therefore, also in the present embodiment, the strength of the divided header pipes 4 and 6 can be secured, and the number of parts can be reduced. Moreover, since the head portion 25a of the other blind cap 25 abuts on the tube 2, the strength can be further enhanced. Further, since the one blind cap 24 is provided with the projection 24a for preventing oil accumulation, lubrication is provided. Since oil does not collect, it is possible to avoid a shortage of lubricating oil in the refrigeration cycle.

(Effect of the Invention) As described above, according to the present invention, since the blind caps provided at the divided ends of the header pipe are integrally formed, the strength of the divided header pipe can be improved. Also, the number of parts can be reduced.

[Brief description of drawings]

1 to 4 (a) and (b) relate to an embodiment of the present invention. FIG. 1 is a front view of a heat exchanger, and FIG. 2 is a divided end portion of a divided header pipe. Enlarged front view, FIG. 3 is a plan view of the blind cap, FIGS. 4 (a) and 4 (b)
Are sectional views taken along the line IV-IV in FIG.
5 and 6 relate to another embodiment of the present invention.
The figure is an enlarged front view showing the divided end portion of the header pipe, FIG. 6 is a plan view of a blind cap, FIGS. 7 and 8 are related to a conventional example, and FIG. 7 is a front view of a heat exchanger. FIG. 4 is an enlarged front view showing a header pipe divided end portion. 2… Tubes 4, 6… Divided header pipes 8, 9, 24, 25… Blind caps 21… Heat exchanger

Claims (1)

[Scope of utility model registration request] 1. A parallel flow type heat exchanger in which header pipes are connected to both ends of a plurality of parallel tubes, and at least one header pipe is divided into at least two members in the longitudinal direction. A heat exchanger characterized by integrally forming a blind cap provided at each divided end of the formed header pipe.