JPS58179797A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve the workability and the strength of the heat exchanger by a method wherein in case an aluminum core plate of a hot water radiator for a car heater and a resin tank are connected together, an electrolytic corrosion preventive member is interposed between the resin tank and the core plate and both of the core plate and the resin tank are fixedly connected with a supporting iron plate. CONSTITUTION:The supporting iron plate 8 having an aluminum plated layer 8a is fitted on the outer edge 5b of the core plate 5 and the outer side of the shoulder 7 on the end surface of the resin tank 3 and a tooth-like projection 8b is formed in the direction shown by the arrow. As a result, the resin tank 3 is connected airtight to the outer edge 5b of the core plate 5 through a resilient sealing member 6. With the above structure, it is made possible to protect the heat exchanger against the electrolytic corrosion and to improve the strength and the workability of the heat exchanger since the aluminum plated layer 8a is inpterposed between the core plate 5 and the supporting plate 8.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement in a heat exchanger that combines a resin tank and a resin tank, and is suitable for use in automobile engine radiators, hot water radiator ships for car heaters, and the like.

Conventionally, in this type of heat exchanger, as shown in FIG.
A structure in which the resin tank 3 is connected to one end shoulder 7 of the resin tank 3 by plating through the fi is normally used.

In such a structure, since the far plate 5 is made of aluminum, the thickness of the far plate 5 must be increased in order to ensure the tightening strength.
If the plate thickness is increased, a problem arises in that the plating workability deteriorates. Therefore, it has been extremely difficult to simultaneously ensure shark strength and improve saponification processability.

In view of the above points, the present invention uses an auxiliary plate made of iron, which has excellent strength, in addition to the core 1-plate made of aluminum,
By plating and joining the core plate and the atni tank with this auxiliary plate, it is possible to improve both the strength and the pleat workability, and in addition, an anti-electrolytic corrosion material is used between the auxiliary plate and the far plate. It is an object of the present invention to provide a heat exchanger that can prevent electrolytic corrosion caused by contact between aluminum and iron by interposing the aluminum and iron.

The present invention will be described below with reference to embodiments shown in the drawings.

Figures 2 to 4 show an example in which the present invention is applied to a radiator for an automobile engine, in which 1 is a tube with a flat cross section made of aluminum, 8 is a corrugated fin made of aluminum, and 3 is a corrugated fin made of aluminum. An inlet vibrator 3a is a resin tank in the L section made of a molded product of resin such as nylon resin containing glass fiber as a reinforcing material.

The water injection lever 3b and the like are integrally reed-shaped. 4 is a lower resin tank made of the same material, and the outlet vibrator 4a and the like are integrally made of FliJ cedar. Reference numeral 6 denotes an aluminum core plate, which has a collared hole 5a for fixing the tube end. This core plate 5 is arranged at the lower E end of the tube 1. In addition, tube 1. Fin 2. The material of the far plate 5 is made of aluminum, and the material of the far plate 5 is Muro 951 aluminum as the core material, and aluminum is used for the outer air side.
゜An aluminum clad material in which the outer surface of the daffodil is clad with A7072 is suitable, and an elastic sealing material that seals between the outer edge s5h of these cranes 5, such as an elastic material with excellent heat resistance and swelling resistance, is suitable. two)! It has a circular cross section and is similar to tank 3.
, 4 are connected in a rectangular shape along the shape of the end portions. A wide end shoulder 7 facing the outer edge 5b of the far plate 5 is formed at the end of the tank 3.4. Further, the outer edge portion 5b of the far plate δ is formed into a flat shape without a bent portion at the tip.

Reference numeral 8 denotes an auxiliary plate made of iron (for example, 8PCC), which has a cross-sectional shape (groove shape) that can be fitted to the outside of the joint between the outer edge 5b of the fur plate 5 and the end shoulder portions of the resin tanks 3 and 4. An aluminum oxide layer 8a is formed on the surface thereof. This auxiliary plate 8 is divided into two parts at the line part of the second Wi, and is fitted on the outside of the above-mentioned joint part, and a tooth-shaped central piece is formed at the upper end of the outer part of the auxiliary plate 8. By plating 8b in the direction of arrow B in FIG. 4, the outer edge portion 5b of the core plate 5 and the III fat tanks 3 and 4 are hermetically connected via the elastic sealing material 6.

In this example, the thickness of the far plate 5 is 1.
The thickness of the auxiliary plate 8 is 0.6 to 1 at the cliff IIj of 0 to 2.0.
．． The thickness of the aluminum layer 8a is preferably 45 to 60 g/j1g on each side.
.

A problem occurs in which the aluminum core plate 5 and the single-plate supplementary plate 5 are unilaterally accelerated in corrosion, but in the present invention, since the aluminum plating layer 8a is formed on the surface of the supplementary plate 8, the far plate 5 is eliminated, and as a result, corrosion of the far plate b due to electrolytic corrosion is reduced.

The present invention j'i,, l: The present invention is not limited to the one embodiment described above, but can be modified in various ways, and other embodiments will be explained below.

In FIG. 5, the tip of the outer edge portion 5b of the fur plate 5 is extended to provide a folded portion 5c in the example shown in FIG. 4, and the tank 3 is
The ease of assembly has been improved.

In Fig. 6, a steel plate having a normal koji protective plating layer 8C such as zinc plating or i-tin plating is used as the auxiliary plate 8, and the auxiliary plate 8 and the far plate are used to prevent corrosion due to contact potential difference. A thin resin film 9 is interposed between the base plate 5 and the base plate 5, and the electrical insulation effect of this resin film 9 prevents corrosion.

In the example shown in FIG. 6, the resin film 9 may be fixed to the preliminary core plate 5 or the auxiliary plate 8 by adhesive or the like, or a coating may be used instead of the resin film. .

Furthermore, in the example shown in FIG. 4, five layers of resin fill or a resin coating film may be formed instead of the aluminum plating layer 8a.

In addition, if the material has the same electrical insulation as resin,
Materials other than resin can also be used.

As explained above, according to the present invention, the iron auxiliary plate 8f
By using t, it is possible to secure the saponifying strength and improve the scissoring workability, and also to prevent electrolytic corrosion by using an electrical insulating material such as aluminum plating or * fat.
By providing m, 9), there is an effect that corrosion of the aluminum fur-free plate 5 can also be prevented.

[Brief explanation of the drawing]

Fig. 1 is a view of main parts of a conventional heat exchanger in the Wk direction, Fig. 2 is a front view of a heat exchanger according to an embodiment of the present invention, Fig. 113 is a sectional view taken along arrow 1-I in Fig. 2, 4blJ is an enlargement of part A in Figure 3'
#Detailed drawing, FIG. 5 shows another embodiment of the present invention? FIG. l...tube, 3.4...resin tank, S...
Core plate, 8... Auxiliary plate, aa-- Aluminum plating layer forming an electrolytic corrosion preventive material, 9... Resin film forming an electrolytic corrosion preventive material. Attorney Okabe 1 Written amendment (formality) August 3, 1980 Commissioner of the Japan Patent Office 1 Display of case 1982 Patent Application No. 62689 2 Name of invention Heat exchanger 3 Case of person making amendment Relationship: Patent applicant 1-1 Showa-cho (426), Kariya-shi, Aichi Prefecture Representative: Kengo Toda 4th Director 1-5 Showa-cho, Kariya-shi, Aichi Prefecture 448 Date of amendment order 1982 July 9th (Delivery date: July 27, 1982) 6. Brief explanation of the drawings in the specification subject to amendment 7. Contents of the amendment (11. "Figure 5 is" on page 47, line 8 of the specification) [Figures 5 and 6 are corrected respectively].

Claims (1)

[Claims] An aluminum tube, an aluminum core plate F that holds and fixes the end of this tube, a resin tank disposed on the outer edge of this core plate via an elastic sealant, and the core plate and resin tank. 1. A heat exchanger comprising an auxiliary plate made of iron for fixation, and an anti-electrolytic corrosion material interposed between the auxiliary plate and the core plate.