JPH0689944B2 - Hot water storage system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hot water storage type hot water supply device.

2. Description of the Related Art In a conventional hot water storage type hot water supply device, water that has passed through a water shutoff valve is supplied from the lower part of a hot water storage tank through a water supply pipe and a water supply / drainage pipe. On the other hand, at the time of drainage, the water in the hot water storage tank was drained through the water supply pipe by opening the drainage valve as in the case of water supply.

An example of a conventional hot water storage type hot water supply device will be described below with reference to the drawings.

FIG. 4 is a configuration of a conventional hot water storage type hot water supply apparatus, FIG. 5 and FIG.
The figure shows the structure of a conventional drainage valve section.

In FIGS. 4, 5, and 6, 1 is a hot water storage tank, 2
Is a heating device fixed to the hot water storage tank 1 for heating the water in the hot water storage tank 1, 3 is a water shutoff valve for controlling water shutoff into the hot water storage tank 1, and 4 is water passing through the water shutoff valve 3. A mixing valve that distributes the secondary water supply and the water supply to the hot water storage tank 1, 7 connects the mixing valve 4 and the hot water storage tank 1, and a water supply pipe that guides the water supply to the hot water storage tank 1, 5 shows the water in the hot water storage tank 1. Drain valve to drain,
Reference numeral 6'denotes a water supply / drainage pipe connecting the hot water storage tank 1, the water shutoff valve 3 and the drainage valve 5, and 9 a hot water supply pipe.

The operation of the hot water storage type hot water supply device configured as described above will be described below.

First, at the time of water supply, the water supplied by opening the water shutoff valve 3 is distributed by the mixing valve 4 to the secondary water supply and the water supply into the hot water storage tank 1, and as shown in FIG. Water is supplied to the hot water storage tank 1 through the water supply / drainage pipe 6 '. When the hot water storage tank 1 is full, excess water flows out through the hot water supply pipe 9. Then, by closing the water shutoff valve 3, the water supply to the hot water storage tank 1 is stopped, and the inside of the hot water storage tank 1 is kept constant with full water. The water in which the hot water storage tank 1 is kept full is heated by the heating device 2 and boiled up to the set temperature. The boiling water is supplied from the lower part of the hot water storage tank 1 by opening the water shutoff valve 3 again. As a result, the hot water in the hot water storage tank 1 is pushed up and the hot water supply pipe 9
It leaks together with the secondary water supply.

On the other hand, at the time of cleaning or draining the hot water storage tank 1, the water shutoff valve 3
When the drain valve 5'is opened as shown in FIG. 6 in a state in which the water is closed, that is, the water is not supplied to the hot water storage tank 1, the water in the hot water storage tank 1 is in the same pipe as that at the time of the water supply, that is, the water supply and drain pipe 6 '. Drained through.

Problems to be Solved by the Invention However, in the above-described configuration, water is always supplied and drained through the same pipe, that is, inside the water supply / drainage pipe 6 ′, regardless of whether water is being supplied to the hot water storage tank 1 or when it is being drained. And the drainage pipe 6 through which the deposits etc. in the hot water storage tank 1 passed during drainage.
Therefore, the water supply to the hot water storage tank 1 also flows during the water supply. Therefore, there is a possibility that precipitates and the like are mixed in the water supplied into the hot water storage tank 1,
There was a problem that the inside could not be kept clean.

The present invention addresses the above-mentioned problems, and prevents the water supplied to the hot water storage tank from being mixed with the precipitates contained in the drainage during the drainage and being supplied to the hot water storage tank. It proposes a hot water storage type hot water supply device that can always keep the hot water in the tank clean.

Means for Solving the Problems In order to solve the above problems, the hot water storage type hot water supply apparatus of the present invention has a water supply pipe and a drain pipe independently connected to the bottom of the hot water storage tank, and the drain pipe is thicker than the water supply pipe. Then, the drain valve is opened to simultaneously provide a connecting portion for connecting the water supply pipe and the drain valve.

Operation According to the present invention, when the water in the hot water storage tank is drained, the drainage is guided to the drain pipe with less resistance without draining the water in the hot water storage tank, and the precipitates in the hot water storage tank do not pass through the water supply pipe. Since it can be drained, dirty water will not be supplied even when resupplying water, and clean water will always be supplied. Therefore, the water in the hot water storage tank can always be kept clean.

Embodiment Hereinafter, a hot water storage type hot water supply apparatus according to an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1, 2, and 3, 1 is a hot water storage tank, 2
Is a heating device fixed to the hot water storage tank 1 for heating the water in the hot water storage tank 1, 3 is a water supply / stop valve for supplying / stopping water to / from the hot water storage tank 1, 4 is hot water storage for adjusting the hot water temperature A mixing valve that adjusts the amount of water supply to the tank 1 and the amount of secondary water supply,
Reference numeral 5 is a drain valve for draining the water in the hot water storage tank 1. 6 is a hot water storage tank 1 in which the drain valve 5 and the hot water storage tank 1 are connected.
A drain pipe for guiding the water inside to the drain valve 5, 7 is a water pipe for connecting the mixing valve 4 and the hot water storage tank 1 and guiding the water supply into the hot water storage tank 1, and 8 is for opening the drain valve 5. , Water supply pipe 7
A hot water supply pipe 9 and a drainage pipe 6 have a diameter larger than that of the water supply pipe 7.

The operation of the hot water storage type hot water supply device configured as described above will be described below.

First, by opening the water shutoff valve 3, water is supplied to the hot water storage tank 1 through the water supply pipe 7 to fill the hot water storage tank 1 with water.
On the other hand, when the water in the hot water storage tank 1 is drained, the state shown in FIG. 3 is established by opening the drain valve 5, and the water in the hot water storage tank 1 is drained, and the water supply pipe 7 and the drain pipe 6 are connected. Connected via the section 8. Therefore, the dirty water in the hot water storage tank 1 can be drained without passing through the water supply pipe 7, and at the same time, the water in the water supply pipe 7 can be drained.

With the above-described configuration, when the water in the hot water storage tank 1 is drained, the drainage is guided to the drain pipe 6 having a low resistance without passing through the water supply pipe 7 having a high resistance, so that the hot water storage is performed. The deposits in the tank 1 will not be mixed in the water supply pipe 7, and even when the water is re-supplied, sewage and sediments will not enter the hot water storage tank 1 again, so that clean water can always be supplied. it can.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) The drain pipe and the water supply pipe are separated from each other, and the residual water in the water supply pipe can be drained by operating only one drain valve.

(2) Precipitates in the hot water storage tank can be prevented from flowing into the water supply pipe during drainage.

(3) Since the residual water in the water supply pipe can be drained, it is possible to prevent the water supply pipe from being blocked due to freezing.

(4) Since the sediment and dirty water are not mixed in the water supply, the water in the hot water storage tank can be kept clean.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hot water storage type hot water supply apparatus according to an embodiment of the present invention,
2 is a detailed view of the drain valve closed state of the same embodiment, FIG. 3 is a detailed view of the drain valve open state of the same embodiment, FIG. 4 is a configuration diagram of a conventional hot water storage type hot water supply apparatus, and FIG. FIG. 6 is a detailed view of the drainage valve portion closed state of the conventional example, and FIG. 6 is a detailed view of the drainage valve portion opened state of the conventional example. 1 ... Hot water storage tank, 2 ... Heating device, 3 ... Water stop valve,
5 ... Drain valve, 6 ... Drain pipe, 7 ... Water supply pipe, 8 ... Connection part.

Claims (1)

[Claims] 1. A hot water storage tank having a heating device, a water shutoff valve for controlling water shutoff into the hot water storage tank at a lower portion of the hot water storage tank, and water feed connecting the hot water shutoff valve and the hot water storage tank. A pipe and a drain valve for draining the water in the hot water storage tank,
A hot water storage type hot water supply apparatus comprising: a drain pipe that connects the drain valve and the hot water storage tank and is thicker than the water supply pipe; and a connecting portion that connects the water supply pipe and the drain pipe by opening the drain valve. .