JPH0424322Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a water heater for both high and low temperatures, which can provide hot water of different temperatures simultaneously or separately from one hot water tank for different purposes where high and low temperature hot water are separately required.

[Conventional technology]

In the hot water supply rooms and kitchens of business establishments and small and medium-sized office buildings, it is common to have separate hot water heaters for drinking and miscellaneous use (for washing food and utensils, etc.) for hot water supply. . For example, for beverages such as coffee and tea, hot water close to the boiling point is required to enhance the aroma and taste. The top of the is open. A kettle-like water heater is used. If you boil water in a closed water tank, in order to obtain hot water efficiently, it is necessary to install the hot water inlet at the top due to the specific gravity, and air bubbles will concentrate at the top and form a steam layer. If this happens, the moment the hot water supply opening is opened, only steam will come out, causing danger and problems. On the other hand, low-temperature hot water (40-45℃) for miscellaneous use requires a large flow rate, so it is preferable that the water heater used for this purpose has a structure that allows some internal pressure to act on the hot water faucet. Even if the distance to the faucet is longer and the temperature drops slightly due to the heat dissipated as the hot water flows through the hot water pipes, it will not interfere with use, so it is best to install it in a location away from the hot water supply station where it will not get in the way. can. Therefore, the current situation is that water heaters for miscellaneous use are of the so-called water heater type, with a sealed hot water tank.

[Problem that the idea aims to solve]

Using two water heaters of two different types for two different uses, one for drinking and one for miscellaneous purposes, is extremely uneconomical in terms of equipment and maintenance costs, and is also limited in terms of the space required for installation. I have a problem when I receive it. In addition, we are aware that although it may be suitable for one purpose, it may cause inconvenience or trouble for the other purpose.
Some usage methods have been adopted in which a single water heater is sufficient, but in any case, a solution is desired.

[Means to solve the problem]

This invention was developed in consideration of steam, and its purpose is to interpose an automatic mixing valve between a water supply pipe and both branch pipes branching from the hot water supply pipe, and to take out high temperature and low temperature hot water simultaneously or separately. An object of the present invention is to provide a water heater for both high and low temperatures that is improved so as to be effective in terms of safety. In order to achieve the above object, the high and low temperature water heater, which is a feature of the present invention, sends hot water to the faucet side through a water supply pipe extending from the water supply side to a hot water tank in which a heating element is housed inside. In a water heater connected to a hot water supply pipe for high temperature, the water supply pipe is connected to a first water supply pipe and a second water supply pipe, and the high temperature water supply pipe is connected to a first water supply pipe and a second water supply pipe. The first water pipe is connected to the sink drain via a relief valve, the second water pipe is connected to the first inlet side of the automatic mixing valve, and the first water pipe is connected to the first inlet side of the automatic mixing valve. The hot water distribution pipe is connected to the faucet via a hot water faucet, and the second hot water distribution pipe is connected to the second inlet side of the automatic mixing valve, and a low temperature hot water supply pipe is connected to the outlet side of the automatic mixing bubble. At the same time, an automatic air release valve is installed on the top of the hot water tank.
The exhaust pipe of this automatic air release valve is connected to the drain port.

[Effect]

When the hot water tap is opened, the boiled water first flows from the distribution pipe to the faucet side, and can be used for drinking purposes. On the other hand, if you need low-temperature hot water for chores such as washing, simply open the faucet on the low-temperature water supply pipe, and the water flowing from the second water supply pipe will mix with the water flowing from the second water supply pipe.
The hot water flowing from the hot water distribution pipe is mixed by an automatic mixing valve, becomes the desired low temperature hot water, and can be taken out from the low temperature supply pipe. In this case, the low-temperature hot water can be taken out at any time regardless of the hot water supply operation taken out from the first branch pipe of the high-temperature hot water supply pipe. During operation of the hot water heater for both high and low temperatures, the steam accumulated in the upper part of the hot water tank flows out to the drain port through the automatic air release valve. In addition, since high-temperature hot water is naturally present in the second branch pipe, the pressure of the high-temperature hot water may rise in some unexpected situation at the automatic mixing valve and the second
If pressure is applied to the water supply pipe side, pressure will be applied to the pressure reducing valve on the water supply pipe side, and at this time, water supply pressure will also be applied from the water supply pipe side, so
There is no place for the pressure to escape, but even in such a situation, the pressure can be released to the drain port side via the relief valve by the first water distribution pipe.

【Example】

An embodiment of the present invention will be described below with reference to the attached drawings. In the case shown, the hot water tank 1 of the water heater is of a closed type, and the bottom 1a of the hot water tank 1 has a wall extending from the water supply side. The tip of the water supply pipe 2 is connected in an open manner, and a hot water supply pipe 3 for high temperature is connected in an open manner to the upper part 1b of the hot water tank 1. 4 is a water supply port, and 5 is a hot water outlet. The hot water tank 1 is equipped with a heating element 6 such as a sheathed heater and a thermostat 7, as in a normal hot water tank.
b is equipped with an automatic air release valve 8 for automatically releasing steam generated during boiling water. An exhaust pipe 9 of this automatic air vent valve 8 is connected to a drain port 11 of a sink 10 shown by a phantom line, and a drain pipe 12 is connected to the drain port 11. A first water distribution pipe 2a branched from the water supply pipe 2 is connected to the drain port 11 with a relief valve 13 interposed in the middle.
In addition, a second water distribution pipe 2b branched from the water supply port 2
are connected to one inlet side of the automatic mixing valve 14, while the first branch pipe 3a branched from the high temperature water supply pipe 3 is connected to the faucet 16 via the hot water faucet 15.
In addition, second hot water distribution pipes 3b branched from the high-temperature water supply pipe 3 are connected to the other inlet side of the automatic mixing valve 14, respectively.
A low-temperature hot water pipe 17 connected to the outlet side of the hot water supply pipe 17 provides low-temperature hot water. In addition,
The automatic mixing valve 14 can be a known hot water mixing valve whose opening degree is adjusted depending on the temperature, and the low-temperature water supply pipe 17 is connected to a faucet (not shown) on a cooking table, a sink for washing, etc. ing. In the figure, 18 is a pressure reducing valve, 19 is a connecting pipe, 20 is a drain valve, 21 and 22 are baffle plates, and 23 is a heater such as a hot plate.

[Effect of the idea]

The present invention is as described above, and there is no need to install two types of water heaters, one for drinking and one for washing, in a water heater room, etc., and a single unit can supply hot water to high and low temperatures simultaneously or separately. If a closed type hot water tank is used as in the illustrated embodiment, it can be installed under the sink or cooking table, which solves the problem of space and allows for economical installation as well as convenience. There are advantages to using it. In addition, as mentioned above (explanation in the section on effects), if the pressure of high-temperature hot water increases due to some unexpected situation and the pressure acts unduly on the second water distribution pipe side, the first water distribution pipe The water pipe allows the pressure to be released to the outlet via the relief valve, and in the case of abnormal pressure in the hot water tank, the pressure can be released from the automatic air release valve to the drain. The existing equipment that is always installed in sinks releases the pressure to the safest outlet, so it is extremely safe in terms of safety. In other words, the water heater for both high and low temperatures according to the present invention can also perform the function of boiling hot water for drinking (around 95 degrees Celsius). It can be automatically excluded. This eliminates the risk of burns caused by splashing of hot water caused by steam or other gases in the tank, and at the same time allows for a stable supply of mixed hot water.Additionally, new piping is required to relieve abnormal pressure. Its practical value lies in the fact that it is safe and convenient to use, such as not needing it, so there is no waste in the piping system, space problems are solved, it can be installed economically, and it is cost-effective. is extremely large.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view, and FIG. 2 is a partially omitted front sectional view. In the figure, 1 is a hot water tank, 2 is a water supply pipe, 2a is a first water distribution pipe, 2b is a second water supply pipe, 3 is a hot water supply pipe for high temperature,
3a is a first hot water pipe, 3b is a second hot water pipe, 6 is a heating element, 8 is an automatic air release valve, 9 is an exhaust pipe, 10 is a sink, 11 is a drain port, 13 is a relief valve, 14 is an automatic mixing valve, 15 is a hot water tap, 16 is
17 is a faucet, and 17 is a low-temperature water supply pipe.

Claims (1)

[Scope of utility model registration request] In a water heater in which a water supply pipe extending from the water supply side and a high-temperature water supply pipe that sends hot water to the faucet side are connected to a hot water tank in which a heating element is housed, the water supply pipe is connected to the first branch. The high-temperature water supply pipe is branched into a first water pipe and a second water pipe, and the first water pipe is connected to the sink via a relief valve. At the drain, also at the second
The water distribution pipes are respectively connected to the first inlet side of the automatic mixing valve, while the first water distribution pipe is connected to the faucet via the hot water faucet, and the second water distribution pipe is connected to the second water distribution pipe of the automatic mixing valve. A low-temperature hot water supply pipe is connected to the inlet side of the automatic mixing bubble, and an automatic air vent valve is installed at the top of the hot water tank, and the exhaust pipe of this automatic air vent valve is connected to the outlet side of the automatic mixing bubble. A water heater for both high and low temperatures, characterized in that it is connected to the above-mentioned drain port.