JPH02146434A - Hot water feeding method - 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 the Invention The present invention relates to a hot water supply method for supplying hot water to a sink or the like in a general household.

Conventional technology Conventional hot water supply methods include the first method, in which hot water is drawn from a faucet via a hot water supply pipe from a water heater installed outdoors that uses gas as a heat source, and the second method, as shown in Figure 2. (
As shown in Japanese Unexamined Patent Publication No. 61-114048, there is a hot water supply method in which a container for keeping hot water warm is placed between a water heater and a faucet.

In FIG. 2, hot water heated by a water heater 1 is discharged from a faucet 3 via a heat retention unit 2.

A tank 4 is disposed in the heat retention unit 2, and the hot water 5 inside the tank 4 is heated by a heater 6 and a power plug 7 to maintain the hot water at a constant temperature.

On the other hand, the tank 4 is connected to the water heater 1 through a hot water supply pipe 8, and is configured so that hot water can flow into the tank 4.

The tank 4 is connected to the faucet 3 via a mixing valve 10 and a hot water supply t11, and the mixing valve 10 is also connected to a water supply pipe 12 to introduce tap water.

Similarly, the water heater 1 is also configured so that water can be introduced from the water supply pipe 13.

The mixing valve lO detects the temperature of hot water 5 and supplies hot water to the set temperature! 711 and water supply pipe 12 can be adjusted.

The operation will be described below. When the faucet 3 is turned, hot water 5 and water from the water supply pipe 12 are mixed at a constant ratio via a mixing valve 10, and hot water at an appropriate temperature is dispensed from the faucet 3.

As a result, the water heater 1 responds and sends hot water through the hot water supply pipe 8.

At this time, the hot water in the hot water supply pipe 8 is cooled by the outdoor temperature, and the cold hot water is sent into the tank 4.

In the tank 4, the water is mixed with hot water 5 maintained at a high temperature, and hot water at an appropriate temperature is dispensed from the faucet 3.

As time passes, the hot water heated by the water heater 1 comes to be directly supplied from the faucet 3 via the tank 4.

When the user finishes using the hot water and closes the faucet 3, the water heater 1 stops operating and the hot water 5 in the tank 4 is heated and kept at a constant temperature by the heater 6.

The hot water in the hot water supply pipe 8 is cooled by the outdoor temperature, and remains at a low temperature in a standby state for reuse, and this process is repeated thereafter.

Problems to be Solved by the Invention In the hot water supply method of the conventional water heater described above, in the first method, hot water does not come out immediately even when the faucet is turned on, and it takes time for the water to become warm.

The second method uses a first stop method and ensures safety by installing devices to prevent overheating caused by heating water, overpressure prevention devices, overpressure relief valves, dry-burn prevention devices, earth leakage breakers, etc. There is a need to.

Means for Solving the Problems The hot water supply method of the present invention utilizes a vacuum container as a means for keeping hot water warm.

Hot water from the working water heater is stored in a vacuum container and then dispensed through the faucet. Therefore, no heating means is required,
There is no need to add a temperature overheat prevention device, a dry firing prevention device, or an earth leakage breaker, and furthermore, there is no need to install an overpressure prevention device or overpressure relief valve caused by heating and expansion of water.

EXAMPLE An example of the present invention will be described below with reference to FIG. 1 is a water heater that uses gas etc. as fuel, 2 is a heat retention unit,
3 is a faucet. A tank 15 made of a vacuum container for storing water 5 is arranged in the heat retention unit 2. The tank 15 is composed of an outer container 15a and an inner container 15b made of stainless steel or the like, and defines a vacuum space 15c. The lower part of the tank 15 is connected to the hot water supply pipe 8 through a hole 16, and the upper part is connected to the hot water supply pipe 11 through a hole 17. Further, the hot water supply pipe 11 is connected to the faucet 3 via a mixing valve 10, and the hot water supply pipe 8 is connected to the water heater 1, and one of the mixing valves 10 is connected to the water supply pipe 12. The water heater 1 is configured to supply water through a water supply pipe 13.

The operation will be explained below. When the faucet 3 is turned on, the water heater 1 operates, introducing water from the water supply pipe 13, passing through the hot water pipe 8, tank 15, and hot water pipe 11 as hot water, and mixing it with the water in the water supply pipe 12 at the mixing valve 10.
Hot water comes out from faucet 3.

Normally, until the faucet 3 is opened, the hot water stored in the hot water supply pipe 8 is cooled by the outside air and becomes cold water since it is located outdoors. Further, the hot water 5 in the tank 15, which is normally installed inside a washbasin, is kept warm at a high temperature due to the high heat insulation performance of the vacuum space 15c.

Therefore, when the faucet 3 is opened, the low temperature hot water mixes with the hot water 5 and is discharged from the faucet 3. The hot water supply pipe 11 is long, and the amount of low temperature hot water is small, so that hot water 5 comes out immediately when the faucet 3 is opened.

The amount of hot water in the hot water supply piping 8 is determined by the length of the piping, and the tank 15 has a capacity sufficient to accommodate this amount.
This is the setting. Moreover, once the hot water is dispensed, hot water is supplied from the water heater 1, so there is no need to run out of hot water.

Furthermore, new hot water is always supplied to the tank 15 by the water heater 1. Therefore, it is possible to construct a water heater that can dispense hot water even without heating by a heat source.

Effects of the Invention The present invention is an easy-to-implement hot water supply method in which hot water can be dispensed as soon as the faucet is turned on, and there is no need for a heat-retaining device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. 1... Water heater, 3... Faucet, 5... Hot water, 11... Hot water pipe. 15... Tank (vacuum container), 15b... Inner container.

Claims (1)

[Claims] The hot water from the water heater (1) that heats water and supplies it to the vacuum container (
15) A hot water supply method characterized in that hot water is supplied from a faucet (3) via a hot water supply method.