JPS5914653Y2 - water heater - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water heater that always provides hot water of a certain temperature or higher when the faucet is opened.

A water heater that brings hot water produced in a boiler to a faucet through a hot water supply pipe will drop the temperature of the hot water remaining in the hot water pipe if the faucet is not opened for a long time, and the water will be cold for a while when the faucet is opened. It will come out.

In order to solve this problem, there is a system in which a return pipe is provided in parallel with the hot water supply pipe, and the low temperature hot water that returns through this pipe is reheated and circulated.

However, this type of system requires a return pipe, which is troublesome, and has the disadvantage that the pump is kept in constant operation, resulting in high maintenance costs.

In addition, some faucets are equipped with solenoid valves, and when the valve is opened, the remaining hot water is discharged to a different location for a certain period of time, and then hot water comes out from the required location, but hot water does not reach the required location. It took a long time to come out, and it was not easy to use.

The purpose of this project is to solve these drawbacks, and the explanation will be explained based on the following diagram. 1 is a cylinder equipped with a water tank, a ball tap, a pump, etc. inside, and the water in the water tank is pumped by the pump to the boiler 2. We are trying to supply it to

3 is a pressure reducing valve connected between the distiller 1 and the boiler 2 so that the pressure inside the boiler 2 does not exceed a specified value.

Reference numeral 4 denotes a hot water supply pipe, which has a check valve 5 and a pump 6 connected in the middle, and a serpentine lower pipe 7.7 connected to the tip side, and a valve 8 consisting of a thermo valve, which is connected to at least the serpentine lower pipe 7.7.
It is placed alongside one of the.

This valve 8 detects the temperature of the hot water in the hot water supply pipe 4, and opens when the temperature is below a certain value.

9 is a pressure tank, 10 is a pressure switch, and hot water pipe 4
When the internal pressure drops, this switch 10 detects it and starts the pump 6.

In the above configuration, when the snake lower is opened, the hot water in the hot water supply pipe 4 is first pushed out by the pressure in the pressure tank 9.

When the pressure inside the hot water supply pipe 4 thereby decreases, the pressure switch 10 detects this and starts the pump 6, thereby supplying hot water within the boiler 2 to the serpentine lower through the hot water supply pipe 4.

When the faucet is closed, the pressure inside the hot water supply pipe 4 increases, and when the pressure exceeds a certain value, the pressure switch 10 detects this and stops the pump 6.

If the lower opening is not opened for a long time, the temperature of the hot water remaining in the hot water supply pipe 4 will become low, but when the temperature drops below a certain level, the valve 8 will open and the hot water remaining in the hot water supply pipe 4 will be discharged from this valve. It will be expelled.

Since the valve 8 is arranged in parallel with one of the lower snakes, there is naturally a washbasin etc. below it, so even if the valve 8 opens and hot water comes out, the surrounding area will not get wet.

When the valve 8 opens and the hot water in the hot water supply pipe 4 is discharged, the pressure in this pipe decreases, and the pressure switch 10 detects this and rotates the pump 6.

As the pump rotates, hot water in the boiler 2 is sent into the hot water supply pipe 4, and when the pressure in the pipe becomes high, the pump 6 is stopped.

At this time, the water temperature detected by the valve 8 is high, so
This valve is closed.

FIG. 2 shows another embodiment, in which the valve 8 and the pump 6 are electrically connected.

When the water temperature detected by the valve 8 becomes low, the pump 6 rotates at the same time as the valve 8 opens, and the high-temperature hot water in the boiler 2 pushes out the low-temperature hot water in the hot water supply pipe 4, making the inside of the hot water pipe 4 hot. Replace with hot water.

When the hot water supply pipe 4 is filled with hot water, the temperature is detected, the valve 8 is closed, and the pump 6 is stopped.

In the above embodiment, the lower snake and the valve 8 are provided separately, but the valve is built into the faucet so that the faucet can be opened and closed manually. It may also be made so that it can be opened and closed.

As described above, in this plan, every time the hot water remaining in the hot water supply pipe 4 cools down, it is drained and replaced with new high temperature hot water, so when the snake lower is opened, high temperature hot water comes out immediately. This has great practical effects.

Further, since a return pipe or the like is not used to replace the remaining hot water in the hot water supply pipe 4, piping work is easy and inexpensive, and there is no need to keep the pump 6 constantly rotating, so maintenance costs are low. There is.

[Brief explanation of the drawing]

FIGS. 1 and 2 are piping diagrams of water heaters in different embodiments, respectively. 6...Pump, 4...Hot water pipe, 7
...Faucet, 8...Valve, 10...
·pressure switch.

Claims (1)

[Scope of utility model registration request] In a device that supplies hot water to a faucet by a hot water pipe with a pump interposed in the middle, a valve that opens when the temperature of hot water in the hot water pipe is below a set value is installed in parallel with the faucet, and this pipe is connected to a part of the hot water pipe. 1. A water heater comprising: a pressure switch that drives the pump when the internal pressure is below a set value.