JPH0264359A - hot water tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hot water storage tank widely used in water heaters and the like, which prevents deformation of the tank that occurs when the tank is under negative pressure.

(Prior Art) Conventionally, cylindrical hot water storage tanks have been widely used as hot water storage tanks used in water heaters and the like.

An example of the above-mentioned conventional hot water storage tank will be described below with reference to the drawings.

FIG. 3 shows a conventional hot water storage tank and a sectional view of the tank. In FIG. 3, 1 is a cylindrical body plate, 2 is an upper head plate, 3 is a lower head plate, 4 is a water supply port, 5 is a hot water supply port, and a six-port heater. Figure 2 is a system diagram using a hot water storage tank. 7 is a water supply pipe, 8 is a hot water supply pipe, 9 is a bypass valve, 10 is a pressure pump, 11 is a pressure reducing valve, and 12 is a safety valve.

The operation of the hot water storage tank configured as described above will be described below.

First, when the valve 9 is opened, water is supplied into the hot water storage tank from the water supply port 4 due to water pressure, and water flows out from the hot water supply port 5 through the valve 9, so that the water storage tank is filled with water. Become. When the pump 8 is operated, water is automatically supplied from the water supply port to the hot water storage tank by the water supply pressure, and pressurized water is pushed out from the pressure pump 10 through the hot water supply port. A second conventional stainless steel hot water storage tank is shown in FIG.

Reference numeral 13 designates a plurality of L-shaped rings welded to the circumference of the inner surface of the body plate 1. The operation as a hot water storage tank is similar to that of the first conventional example, but the ring 13 is provided to improve the negative pressure strength of the tank body.

(Problems to be Solved by the Invention) However, in the first conventional example, when the discharge amount of the pressure pump 10 on the outlet side is greater than the water supply amount on the inlet side, negative pressure is applied to the inner surface of the hot water storage tank. The hot water storage tank had the disadvantage that the inner surface of the body plate 1 was deformed as shown in FIG. In addition, in the second conventional example, as shown in FIG. 6, a slight gap is formed near the welded part 14 between the body plate 1 and the ring 13, and crevice corrosion peculiar to stainless steel occurs, causing holes to form from the inner surface of the body plate. The problem was that 15 holes were generated.

In view of the above-mentioned problems, the present invention provides a hot water storage tank that prevents deformation occurring on the inner surface of the body of the hot water storage tank, and at the same time prevents crevice corrosion occurring on the inner surface of the tank.

(Means for Solving the Problems) In order to solve the above problems, the hot water storage tank of the present invention has a cylindrical can body with a plurality of annular ribs formed integrally with the body along the circumferential direction. This is what I did.

(Function) With the above configuration, the plurality of ribs improves the strength of the can body, and can withstand negative pressure applied to the inner surface of the hot water storage tank when the amount of discharged water on the hot water supply side is greater than the amount of water supplied on the water supply side.

(Example) Hereinafter, a hot water storage tank according to an example of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a cross section of the hot water storage tank of this embodiment. Note that the same parts as in the conventional example shown in FIG. 2 are denoted by the same reference numerals, and the explanation thereof will be omitted. 1st
In the figure, a plurality of annular ribs 1 are integrally formed in the circumferential direction of a cylindrical body plate 1 of a can body.

Regarding the hot water storage tank configured as above, the following is the first part.
The operation will be explained using FIG.

First, when hot water is supplied from a full hot water storage tank using the pressurizing pump 10, if the discharge amount of the pressurizing pump 10 becomes greater than the amount of water supplied from the water supply pipe 1, the inner surface of the body plate l Negative pressure is generated. However, the body plate 1 has a plurality of annular ribs 1 formed in a cylindrical shape, increasing the strength of the body plate, so that plastic deformation does not occur.

Further, unlike the second conventional example, there is no welded part where a gap is formed, so there is no possibility of crevice corrosion occurring.

As mentioned above, it is composed of a water inlet, a hot water inlet, an upper end plate, a lower end plate, and a cylindrical body plate, and by applying multiple annular ribs to the circumference of the body plate, it is possible to prevent the occurrence of negative pressure in the hot water storage tank. This prevents deformation of the inner surface of the shell plate and completely prevents crevice corrosion.

(Effects of the Invention) As described above, the present invention has a body plate composed of a water inlet, a hot water inlet, an upper end plate, a lower end plate, and a cylindrical shape, and a plurality of annular ribs are processed on the circumference of the body plate. By doing so, deformation of the inner surface of the shell plate that occurs when the hot water storage tank is under negative pressure can be prevented, and crevice corrosion on the inner surface of the shell plate can be completely prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the hot water storage tank of the present invention, Fig. 2 is a system diagram of a system using the hot water storage tank, Fig. 3 is a sectional view of the first conventional hot water storage tank, and Fig. 4 is a diagram of the same hot water storage tank. FIG. 5 is a sectional view showing a deformed state, FIG. 5 is a sectional view of a second conventional hot water storage tank, and FIG. 6 is an enlarged sectional view of a main part of the hot water storage tank. 1... Body plate, 1a... Annular rib, 2...
...Upper mirror plate, 3...Lower mirror plate. L-・Ba leap version chart chart, da chart chart

Claims (1)

[Claims] A hot water storage tank in which a plurality of annular ribs are formed integrally with the body of a cylindrical can body along the circumferential direction.