JPS6311503Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a heat exchanger using a resin tank, and particularly to an improvement in the connecting portion between the resin tank and the seat plate.

[Conventional technology]

As illustrated in FIG. 1, in the case of a heat exchanger b using a resin tank a, the resin tank a has a connecting wall c formed on its outer periphery and a seat fixed to the end of the core d. It is connected to the core d by fitting into the coupling groove f formed on the outer peripheral edge of the plate e, but conventionally, when this is fitted, the lower surface g of the coupling wall c and the coupling groove f There is an O-ring i between the bottom surface h of
interveningly installed, and the connecting wall c portion and the connecting groove f
By fastening the O-ring i with the fixing j so that the O-ring i is compressed, the resin tank a and the seat plate e are sealed to prevent liquid leakage. (See Publication No. 54-28158).

However, before being assembled as described above,
Since each component is handled as a single unit, scratches or foreign matter are likely to be formed on the lower surface g of the joint wall c of the resin tank a and the bottom surface h of the joint groove f of the seat plate e, especially during transportation. Also, for the seat plate e, the liquid passage pipe k
When soldering, solder tends to adhere to the bottom surface h of the coupling groove f. From this, how much O-ring i
Even if a seal is applied, it is difficult to ensure complete watertightness due to the formation of minute gaps due to the scratches and foreign matter, and liquid leakage may occur. In addition, when fixing j is attached, O-ring i is often twisted or misaligned, which also causes liquid leakage in the same way as described above. These liquid leaks occur particularly due to changes in temperature and vibration pressure during use.

Therefore, instead of an O-ring, a sealing material that transforms from a liquid state to a solid state is filled into the coupling groove formed around the seat plate, and this sealing material is used to connect the tank and the seat plate. A device has been proposed (see Utility Model Application Publication No. 52-152927).

[Problem that the invention attempts to solve]

However, in this known example, when the tank and the seat plate are joined, since the sealing material is not hardened, the sealing material must be joined to prevent the sealing material from escaping. If the sealing material escapes, the sealing material layer becomes thin and has poor elasticity, which may cause leakage of the coolant.
Therefore, a large force is required to connect the tank and the seat plate.

Furthermore, the sealing material has poor elasticity because it hardens while the tank and seat plate are connected. Furthermore, in the above-mentioned known example, if the sealing material is caulked after being cured, there is a problem in that unevenness is formed on the surface of the cured material, that is, the joint surface with the tank, and sufficient sealing performance cannot be maintained.

[Purpose of invention]

The present invention was devised to solve such conventional problems, and its purpose is to make it possible to assemble a tank and a seat plate while forming an elastic sealing member layer, and to The present invention provides a heat exchanger using a resin tank that can provide reliable sealing performance.

[Means for solving problems]

The heat exchanger using the resin tank according to the present invention is
Between the lower surface of the joint wall formed on the outer periphery of the resin tank and the bottom surface of the joint groove formed on the outer periphery of the seat plate, there are provided a pair of grooves located on the lower surface side and the bottom surface side, respectively, which are hardened after fastening. upper and lower gel-like layers of a room-temperature or heated elastic adhesive, and a cured layer of an elastic body interposed between the upper and lower gel-like layers; It is designed to be fastened using fixing that compresses the hardened layer.

[Effect of invention]

In the present invention, first, a lower gel-like layer of room-temperature or heated elastic adhesive, which is cured after fastening, is provided on the bottom surface of the coupling groove of the seat plate. Next, a hardened layer of elastic material is provided on this lower gel. Thereafter, an upper gel-like layer of room-temperature or heated elastic adhesive, which is cured after fastening, is provided on this cured layer. Then, the joint wall of the resin tank is fitted onto this upper gel-like layer, and the joint wall and the joint groove portion are fastened by fixing so as to compress the hardened layer.

[Example of idea]

Hereinafter, an embodiment in which the present invention is applied to an automobile radiator will be described based on FIG. 2.
It should be noted that the structure of the automobile radiator shown here is the same as that of the conventional structure except for the connecting portion between the resin tank and the seat plate, which is the main part of the invention. Also, although the upper tank side will be explained here, the lower tank side is also configured in the same way.

A lower gel-like layer 4 made of room temperature or heat elastic adhesive that is cured after fastening is provided on the bottom surface 3 of the joint groove 2 of the seat plate 1 (see Fig. 3), and a lower gel-like layer 4 is provided on the lower gel-like layer 4 in advance. A hardened layer 5 consisting of a gasket formed in the shape of the coupling groove 2 of the seat plate 1 is provided using a room temperature or heated elastic adhesive that is hardened into a plate shape (see Fig. 4), and fastened onto this hardened layer 5. providing an upper gel-like layer 6 of room temperature or heated elastic adhesive which is post-cured (see Figure 5);
The connecting wall 8 of the Atsupa tank 7 is fitted onto this upper gel-like layer 6 (see FIG. 6), and the connecting wall 8 portion and the connecting groove 2 portion are attached to the fixing 9 so as to compress the hardened layer 5. The agreement has been concluded.

As the room temperature or heated elastic adhesive, for example, silicone rubber or the like is used. Further, the cured layer 5 may be made of a synthetic resin material or a rubber material, and the lower gel layer 4 and the upper gel layer 6
are formed over the entire width of the coupling groove 2 by coating, and both gel layers 4 and 6 are thinner than the hardened layer 5.

This embodiment has such a structure, so that between the bottom surface 3 of the joint groove 2 of the seat plate 1 and the bottom surface 10 of the joint wall 8 of the Atsupa tank 7, there is a hardened layer 5 and both gel-like layers. Sealed by layers 4 and 6. At this time, the bottom surface 3 of the joint groove 2 of the seat plate 1 and the hardened layer 5 are adhered by the lower gel layer 4, and the lower surface 10 of the joint wall 8 of the hardened layer 5 and the atsupa tank 7 is bonded to the upper gel layer 5. Fixing 9 while being glued by layer 6
The hardened layer 5 is compressed by the action of , and the sealing performance is maximized.

Therefore, in this example, Utility Model Application No. 152927
Unlike the technology disclosed in the above publication, the tank and seat plate are not bonded together before the gel-like sealing material hardens; instead, a hardened layer constituting the sealing member exists separately, and this hardened layer Since the tank and seat plate are bonded from the top and bottom through a gel-like layer, there are problems such as the hardened layer that makes up the sealing member escaping during fixing and becoming thinner, or the elasticity becoming poor. It will be resolved.

In addition, since the hardened layer is pre-formed, it can be handled in the same way as a normal O-ring, which is easier to handle than when using a gel-like layer, and there is no need to wait for the gel-like layer to harden. disappears.

Furthermore, in the present invention, for example, as shown in FIG. 7, if a small protrusion 11 is provided at the center of the lower surface 10 of the joint wall 8, the compressive force of the hardened layer 5 can be increased. Incidentally, the same effect can be achieved even if the small protrusion 11 is provided on the bottom surface 3 of the coupling groove 2.

In the figure, reference numeral 12 indicates a water tube of the radiator core 13, which is fixed to the seat plate 1 by brazing. Further, in the above embodiment, the water tube 12 is fixed to the seat plate 1 by brazing, but the water tube may be press-fitted into a burring hole provided in the seat plate through a sealing material.

Furthermore, in the above embodiment, the fixing 9 was used to caulk the seat plate 1, the upper tank 7, and the lower tank.
The kunk and lower tank may be fixed. Furthermore, when assembling the seat plate 1, the Atsupa tank 7, and the lower tank, a window hole for locking is provided in the seat board 1, such as a heater core, and the Atsupa tank 7 and the lower tank are assembled. Protrusions are provided,
It is also possible to use a method in which the protrusion is locked to the window hole.

[Effect of the invention]

In summary, in the heat exchanger using the resin tank according to the present invention, there is a gap between the lower surface of the coupling wall formed on the outer periphery of the resin tank and the bottom surface of the coupling groove formed on the outer periphery of the seat plate. upper and lower gel-like layers of room-temperature or heated elastic adhesive located on the lower and bottom sides, respectively, and cured after fastening; and an elastic body interposed between the upper and lower gel-like layers. A hardened layer is provided, and the connecting wall portion and the connecting groove are fastened together by a fixing that compresses the hardened layer.
Unlike the invention in Japanese Patent No. 152927, there are no problems such as having to make the hardened layer thin during assembly or having poor elasticity, and it can be formed by tightening using normal fixing. In addition, since the hardened layer constituting the seal member is prepared separately and formed by placing it on the gel layer, the assembly work can be carried out after waiting for the gel layer etc. constituting the hardened layer to harden. This eliminates the problem of having to do this. Furthermore, a hardened layer is formed between the bottom surface of the joint wall of the resin tank and the bottom surface of the joint groove of the seat plate.
sealed by a lower gel-like layer that adheres the hardened layer and the bottom surface of the coupling groove, and an upper gel-like layer that adheres the hardened layer and the lower surface of the joint wall;
However, since the hardened layer is compressed by fixing, even if there are scratches or foreign matter on the bottom surface of the joint groove or the bottom surface of the joint wall, the above-mentioned upper and lower gel layers will not adhere properly. As a result, minute gaps are filled, creating a highly watertight seal and completely eliminating liquid leaks. Furthermore, since both gel layers are formed by coating and do not cause twisting or positional displacement unlike O-rings, the joining process is simple and easy, and the sealing portion is bonded and compressed. Because of this, it has extremely high pressure resistance. In addition, the sealing part can be implemented at a lower cost than conventional O-ring sealing, and even when the gel layer is moved or conveyed before it is cured, it can be compressed and cured. This layer has practical benefits such as being able to maintain a stable bonding state.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of the main parts of a heat exchanger using a conventional resin tank structure, Fig. 2 is a longitudinal cross-sectional view of the main parts of the present invention, and Figs. 3 to 6 are the formation of the same seal, respectively. FIG. 7 is a vertical cross-sectional view for explaining the process, and FIG. 7 is a vertical cross-sectional view of the main part of the same modification. In the figure, 1... seat plate, 2... joint groove, 3...
... Bottom surface, 4 ... Lower gel layer, 5 ... Hardened layer, 6
... Upper gel-like layer, 7 ... Atsupa tank, 8 ...
...Joining wall, 9...Fixing, 10...Bottom surface,
11...Small protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) Between the lower surface of the coupling wall formed on the outer periphery of the resin tank and the bottom surface of the coupling groove formed on the outer periphery of the seat plate, Upper and lower gel-like layers of room-temperature or heated elastic adhesive are located on the bottom side and cured after fastening, and a cured layer of an elastic body is provided between the upper and lower gel-like layers. A heat exchanger using a resin tank, characterized in that the connecting wall portion and the connecting groove portion are fastened together by fixing that compresses the hardened layer. (2) A heat exchanger using a resin tank according to claim 1, wherein the cured layer is made of room temperature or heated elastic adhesive that has been cured into a plate shape in advance. (3) A heat exchanger using a resin tank according to claim 1, wherein the hardening layer is made of a synthetic resin material. (4) A heat exchanger using a resin tank according to claim 1, wherein the hardening layer is made of a rubber material. (5) A heat exchanger using a resin tank as set forth in claim 1 of the utility model registration claim, wherein a small projection for pressurization is provided on the lower surface of the connecting wall and/or the bottom surface of the connecting groove.