JPH0330761Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hot water storage tank used in a water heater or the like.

[Conventional technology]

Figure 4 shows an example of a conventional hot water storage tank.
(See Publication No. 12143). In this hot water storage tank, a hot water storage tank 1 is housed and fixed in a box-shaped exterior body 4 via a heat insulating material 2, and a water supply pipe 7 is arranged on one side of the lower part of the tank, and an electric heater 3 is arranged on the other side. It can be used as a water heater by attaching it and other accessories. The hot water storage tank 1 is directly attached to the bottom plate 5 of the exterior body 4 at its bottom, and the bottom of the hot water storage tank 1 is bulged inward in a mountain shape to create a space between the bottom of the hot water storage tank 1 and the bottom inner surface of the exterior body 4. This space provides insulation.

[Problem that the invention attempts to solve]

In the above-mentioned conventional hot water storage tank, the temperature of the portion 13 below the electric heater 3 is low, and it was thought that there would be little heat loss.

However, the temperature distribution on the wall surface of the hot water storage tank 1 was as shown in FIG. 5, and it was found that the temperature in the lower part 13 was high and the heat loss was large.

However, in the conventional structure described above, the bottom of the hot water storage tank 1 is directly attached to the bottom plate 5 of the exterior body 4, so there is a lot of heat loss, and the bottom of the hot water storage tank 1 and the bottom plate 5 are directly attached.
It was not possible to prevent heat loss only by the space existing between the two, and it was difficult to fill the space with heat insulating material.

Therefore, the present invention aims to make it possible to easily fill the bottom of the hot water storage tank with a heat insulating material and to thoroughly prevent heat radiation at the bottom of the hot water storage tank.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a hot water storage tank in which the hot water storage tank is housed in a casing with a heat insulating material interposed therebetween. A space between the heat insulating supporting member to be attached, the heat insulating packing provided between the fastening means and the protruding part that fixes the protruding part to the bottom plate via the heat insulating supporting member, and the bottom of the tank and the bottom plate of the casing. It is configured to include a heat insulating material filled with the heat insulating material.

[Function] According to the present invention, the bottom of the hot water storage tank is fixed to the bottom of the casing (bottom plate) by the fastening means via the heat insulating support member, and the heat insulation is provided between the fastening means and the protrusion at the bottom of the hot water storage tank. By inserting the gasket, it is possible to cut off the direct heat transfer path between the hot water storage tank and the casing, and because it is fixed by a fastening means, it is possible to cut the direct heat transfer path between the hot water storage tank and the casing. The heat insulating material can be easily filled, and therefore, heat radiation at the bottom of the hot water storage tank can be prevented by the heat insulating support member and the bottom heat insulating material.

〔Example〕

Next, an embodiment of the hot water storage tank according to the present invention will be described based on the drawings.

An embodiment according to the present invention is shown in FIG. 1. In FIG. 1, the same parts as in FIG. 4 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

The main difference from FIG. 4 is that the hot water storage tank 1
, and the space existing between the bottom of the hot water storage tank 1 and the bottom plate 5 is filled with a bottom heat insulating material 12.

FIG. 2 shows details of the bottom support structure of the hot water storage tank 1. A bottom edge of the hot water storage tank 1 projects outward, and a heat insulating support member 6 is interposed between the projecting part 14 and the bottom plate 5. Since the heat insulating support member 6 supports the weight of the hot water storage tank 1, it must have a predetermined rigidity. A fastening bolt 8 is passed integrally between the protrusion 14 and the bottom plate 5 via a heat insulating support member 6, and is fastened with a flat washer 10 and a nut 9. Furthermore, a heat insulating packing 11 is interposed between the flat washer 10 and the protrusion 14, further enhancing the heat insulating effect.

In this way, the direct heat transfer path between the hot water storage tank 1 and the casing 4 that is in contact with the outside air is only a few bolts 8.
and nut 9, the rest is bottom insulation material 1
2. Since it is cut off by the heat insulating packing 11 and the heat insulating supporting member 6, heat radiation from the lower part of the hot water storage tank 1 can be prevented.

Here, FIG. 3 shows the temporal change characteristics of the wall surface temperature of the hot water storage tank 1 at the lower part 13 of the electric heater of the hot water storage tank according to the present invention and the conventional hot water storage tank. This third
As is clear from the figure, the hot water storage tank according to the present invention has a longer heat dissipation time.

[Effect of idea]

As described above, the hot water storage tank according to the present invention has a structure that includes a heat insulating support member and a heat insulating packing between the bottom of the hot water storage tank and the bottom plate, and allows easy filling of a heat insulating material, and also prevents heat dissipation at the bottom of the hot water storage tank. This can be suppressed to the maximum extent and the heat storage effect can be improved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the hot water storage tank according to the present invention, Fig. 2 is a partially enlarged sectional view showing details of the bottom mounting structure of the hot water storage tank, and Fig. 3 is the heat dissipation characteristics of the hot water storage tank below the electric heater. A characteristic diagram showing
FIG. 4 is a longitudinal sectional view showing the structure of a conventional hot water storage tank, and FIG. 5 is a characteristic diagram showing the temperature distribution on the wall surface of the hot water storage tank including the lower part of the electric heater of the conventional hot water storage tank. 1...Hot water storage tank, 2...Insulating material, 3...Electric heater, 4...Casing (exterior body), 5...
...Bottom plate, 6...Insulating support member, 7...Water supply piping, 8...Bolt, 9...Nut, 10...Flat washer, 11...Insulating packing, 12...Bottom insulation material, 14...Protrusion Department.

Claims (1)

[Scope of utility model registration request] In a hot water storage tank in which a hot water storage tank is housed in a casing with a heat insulating material interposed therebetween, a heat insulating supporting member provided between a protrusion projecting from the bottom outer edge of the hot water storage tank and a bottom plate of the casing; A heat insulating packing is inserted between the protrusion and a fastening means that fixes the protrusion to the bottom plate via a support member, and the space between the bottom of the hot water storage tank and the bottom plate of the casing is filled. A hot water storage tank characterized by being equipped with a heat insulating material.