JPS593258Y2 - hot water storage device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a hot water storage device in pursuit of economical efficiency.

Conventionally, for example, an electric water heater is constructed of a single cylindrical hot water storage tank, and an electric heater is placed inside the hot water storage tank.

Also, like a hot water boiler, a chimney passes through the center of the case, and a heat exchange coil is attached around the chimney.

In hot water storage systems with this type of structure, even if the outside of the case is insulated, there is heat loss due to heat transfer from the entire surface of the case, and if the unnecessary amount is not heated, the heat source will The input could not be cut off, making it impossible to save energy.

In addition, general hot water storage tanks have a structure very similar to the one described above for electric water heaters and hot water boilers, and because they store an unnecessary amount of hot water, there is heat loss due to natural heat radiation, which makes it impossible to save energy. There wasn't.

The present invention provides a hot water storage device that solves the above-mentioned conventional problems, and embodiments thereof will be described below with reference to the accompanying drawings.

In the figure, 1 is a hot water storage device, with a small hot water tank 2 with a relatively small capacity at the top and a large hot water tank 3 with a larger capacity at the bottom.
The upper and lower parts are separated by a partition wall 4 that allows water to flow but has little heat transfer.

5 and 6 are coil-shaped fluid-to-fluid heat exchangers disposed in the respective hot water storage tanks 2 and 3; 7 is a heat insulating material integrally covering the exteriors of each type 2 and 3; 9 is an outlet provided at the top of the small water tank 5, from which the water returns to a heat source (not shown) such as a boiler.

10.11 is the outlet provided below the water tanks 2 and 3,
Hot water from the heat source branches at a branch point 12 to each inlet 10.1.
It is designed to be placed in 1.

A water supply pipe 13 from the city water branches in the middle (branch point 14) and is connected from a branch water supply pipe 15 to the inlet of the heat exchanger 6.

After branching, the water supply pipe 13 is further branched (branch point 16) and connected to the outlet of the heat exchanger 6 and the inlet of the heat exchanger 5.

17 is connected to the outlet of the heat exchanger 5, and is connected to the required hot water tap (
(not shown).

Switching valves 18 and 19 are provided between the branch points 14 and 16 of the water supply pipes and between the branch water supply pipes 15, and are controlled so that when one is open, the other is closed.

In addition, it branches at a branch point 12, and the inlet 1 of both top water tanks 2 and 3
There are also switching valves 20.21 on the piping 22 leading to 0.11.
are provided, and are controlled so that when one is open, the other is closed, and further interlocked with the switching valves 18 and 19,
When the switching valve 18 is open, the switching valve 20 is also opened.

Therefore, if you need a small amount of hot water such as washing your face in the morning, the switching valve 18
．． 20, the water supply passes only through the heat exchanger 5- of the small water tank 2, and the heat from the heat source enters only the small water tank 2 for heat exchange.

Furthermore, when hot water is to be supplied to a bath, by opening the switching valves 19 and 21, the water tank and the heat exchanger can all be used, making it possible to exchange a large amount of heat as a whole.

As described above, according to the present invention, the user can use the necessary amount of hot water when necessary, and also reduce the natural heat radiation from the hot water storage tank. System efficiency can be improved and energy savings can be expected.

[Brief explanation of drawings]

The figure is a sectional view of a hot water storage device according to an embodiment of the present invention. 2...Small water tank, 3...Large water tank, 4
......Partition wall, 5゜6...Heat exchanger, 9
... Outlet, 10, 11... Inlet,
14... Water supply pipe, 15... Branch water supply pipe, 17... Hot water supply pipe, 18.19, 20.21.
...Switching valve, 22...Piping.

Claims (1)

[Scope of utility model registration request] Heat transfer from the top to the bottom is achieved by reducing the flow cross-sectional area between the small water tank located above with a relatively small capacity, the large water tank located below with a relatively large capacity, and the two top water tanks. a fluid-to-fluid heat exchanger disposed in each of the water tanks, an outlet provided above the small water tank for returning hot water to the heat source, and a fluid-to-fluid heat exchanger disposed in each of the water tanks; The outlet of the heat exchanger of the large water tank is connected to the inlet of the heat exchanger of the small water tank and the water supply pipe from the water source. The population is a branch water supply pipe branched in the middle of the water supply pipe, - the outlet of the heat exchanger of the Kichiji water tank is a hot water supply pipe to the hot water faucet, and the two inlets are pipes branched from the heat source, At the same time, the heat exchanger and water supply pipes are connected to each other, and two
A switching valve is installed at the branch point leading to the inlet of the water supply pipe, allowing the hot water from the water supply pipe to bypass and flow only to the heat exchanger of the small water tank without passing through the heat exchanger of the large water tank. ,
At the same time, the hot water storage device is characterized in that in this state, the hot water supply from the heat source is switched only to the small water storage tank.