JPS6277597A - Heat exchanger with resin tank - Google Patents

Abstract

PURPOSE:To simplify the sealing material fitting operation by applying a heat curing resin to a sealing portion, and thereafter irradiating ultraviolet rays thereto for a predetermined period of time to thereby form a sealing material, in a heat exchanger wherein a resin made tank is mounted through the sealing material. CONSTITUTION:An acrylic ultraviolet ray curing resin is applied to the inner surface of an annular groove of a seat plate 1 of a heat exchange element 10. When ultraviolet rays are irradiated to the resin, the surface of the resin is cured, with its viscosity held, like an O-ring having an elasticity. Thereafter, the flange part 8 of a resin tank 6 is compressed in a state where the flange part 8 is in contact with the ultraviolet rays curing layer 5, and a projection 7 is engaged with a window hole 3 of the seat plate 1 thereby to integrally form the seat plat 1 having a core with the resin tank 6. The ultraviolet ray curing resin layer 5 satisfies the physical, properties required for the O-ring and the sealing material is fabricated in the assembling process so that it is easier and more convenient as compared with a system of separately manufacturing the O-ring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a sealing part in a heat exchanger using a resin tank.

[Conventional technology]

Conventionally, heat exchangers using resin tanks such as automobile radiators, condensers, heater cores, etc.
As disclosed in Japanese Patent No. 0-27287 and the like, a resin tank is attached to an annular groove provided at the peripheral edge of a seat plate to which a core is attached, via a sealing material.

However, since this type of heat exchanger uses O-rings as sealing materials, it is necessary to insert each O-ring into the annular groove provided at the periphery of the seat plate to which the core is attached. Additionally, this work is labor intensive as it is mainly done by hand. However, since O-rings are usually molded, there is a parting line in the longitudinal direction, and if this parting line comes to the bottom of the resin tank during insertion, it will not be possible to form a sufficient water-stopping structure. There is a possibility.

Therefore, as a measure to solve this problem, for example, Japanese Utility Model Application Publication No. 59-37987 proposes a technique of applying a silicone rubber adhesive instead of the O-ring.

According to this method, the sealing material is formed by applying a silicone rubber adhesive, which is much simpler than inserting an O-ring.

[Problem that the invention seeks to solve]

However, since silicone rubber adhesives are sticky,
The coating process is time-consuming and difficult to apply to heat exchanger production lines that require mass production.

[Purpose of the invention]

The present invention has been made to solve these conventional problems, and its purpose is to provide a heat exchanger with a resin tank in which a sealing material can be easily formed.

[Problem that the invention seeks to solve]

In order to achieve such an object, the heat exchanger with a resin tank according to the present invention is a heat exchanger in which a resin tank is attached via a sealing material to an annular groove provided at the peripheral edge of a seat plate to which a core is attached. After applying photocurable resin to the annular groove,
A sealing material is formed by irradiating a predetermined light.

[Effect]

In the present invention, the sealing material can be formed on the heat exchanger assembly line.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a heat exchanger according to this embodiment, in which reference numeral 1 is a seat plate to which a core 4 is attached, and an annular ring 2 is provided around the seat plate. The annular groove 2 is provided with a window hole 3 for locking the protrusion 7 of the resin tank 6. 5 is a photocurable resin layer formed on the inner surface of the annular groove 2, and functions as a sealing material.

Next, the operation of this embodiment will be explained.

First, a heat exchanger element 10 is prepared in which the seat plate 1 and the core 4 are temporarily assembled in a core assembly process and then integrated in a brazing process according to a conventional method.

Next, an acrylic ultraviolet curing resin is applied to the inner surface of the annular groove 2 of the seat plate 1 of the heat exchanger element 10. This ultraviolet curable resin has a viscosity of about 4,500 cps (rotational viscometer at 25°C) and a specific gravity of about 1.02 (specific gravity cup at 25°C).
), it is a pale yellow transparent liquid and is easier to apply than adhesives. Therefore, this coating operation can be applied in place of the conventional O-ring assembly line.

The ultraviolet curable resin coated as described above is sent to an ultraviolet irradiation process provided after the coating process.

Here, the 300 to 40 O emitted from the ultraviolet lamp
Ultraviolet light having a wavelength of nm is irradiated for about 30 seconds.

By this ultraviolet irradiation, the surface of the ultraviolet curable resin is cured in a viscous form like an elastic O-ring.

Heat exchanger element 10 with ultraviolet curing resin layer 5 formed in this way
is sent to the resin tank 6 assembly process.

Here, according to a conventional method, the resin tank 6 compresses the flange portion 8 provided on its outer periphery while in contact with the ultraviolet curing resin layer 5, and the protrusion 7 is attached to the seat plate 1 while maintaining a predetermined compression ratio. Locked in the window hole 3, seat plate l with core and resin tank 6
and bring them together.

According to the above embodiment, the ultraviolet curable resin layer 5 has physical properties 1 required for a ring, for example, a flatness of 70±5 (JIS H
s), maximum tensile strength of 1 t) Okg/cA, and maximum elongation of 200χ.

Furthermore, the ultraviolet curable resin layer 5 has resistance to LLC, so it can withstand use for a long period of time.

Furthermore, according to this embodiment, the sealing material can be made in the assembly process, which is simpler than a method in which the O-ring is manufactured separately. Moreover, the application work is easier than in a method using adhesive as a sealant. Furthermore, the surface accuracy of the sealing surfaces of the resin tank and seat plate is such that the UV-curable resin blends in easily, making it difficult for solder to adhere to the surface.
Dust adhesion, scratches, etc. can be ignored. Therefore, small water leaks due to adhesion of dust and the like can be prevented. The seal portion can be designed to be small, and there is no need to consider the volume ratio of the caulked portion. Since the entire sealing surface is filled with elastic material, there are advantages such as prevention of internal bypass. In the above embodiment, the present invention is applied to a heater core, but any type of heat exchanger that requires a resin tank and a sealing material may be used, and there is no particular limitation. . Further, the means for assembling the resin tank and the seat plate may be caulking, and is not particularly limited. Further, in the above embodiments, an ultraviolet curable resin is used as the photocurable resin, but the invention is not limited to this, and any resin may be used as long as it has the same effect.

〔Effect of the invention〕

As explained above, in the present invention, a sealing material is formed by applying ultraviolet rays for a predetermined period of time after applying a photocurable resin, so that the work of attaching the sealing material is simplified.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a heat exchanger element after coating with a photocurable resin in an embodiment of the present invention, and Fig. 2 is a sectional view of the main parts of the heat exchanger showing a state in which a resin tank is assembled. . 1... Seat plate, 2... Annular groove, 3... Window hole, 4...
・Core, 5... Photocurable resin layer (ultraviolet curable resin layer)
, 6... Resin tank, 7... Projection, 8... Flange portion. Figure 1 Figure 2

Claims (1)

[Claims] In a heat exchanger in which a resin tank is attached via a sealant to an annular groove provided on the peripheral edge of a seat plate to which a core is attached, a photocurable resin is applied to the annular groove, and then a prescribed light is applied. A heat exchanger with a resin tank characterized in that a sealing material is formed by irradiation.