JPS6012983Y2 - water heater - Google Patents

Description

[Detailed explanation of the idea] This invention is a dispute regarding water heaters.

Conventionally, as shown in FIG. 1', a water pipe 2 is wound around a heat exchanger 1, and a water supply pipe 3 and a hot water supply pipe 4 are connected to the water pipe 2.
A burner 5 is disposed below the heat exchanger 1, and a water flow switch 6 is provided in the middle of the water supply pipe 3 to ignite the burner 5 by water flow. Even if the cooker is opened, it takes about 3 hours to raise the temperature to about 40°C.

At this time, the user usually opens the hot water supply fully, so in a site where the pipe diameter is normal and the length of the pipe is about 10 m, about 7 e of water is wasted to raise the temperature by 40°C.

Therefore, in order to use only a small amount of hot water, there was a problem in that 71 times of wasted water had to be discharged.

The present invention aims to eliminate such difficulties and provide a water heater that can minimize the amount of water discharged at the initial stage of hot water supply and maintain normal operating conditions after the temperature rises to a certain level. I will explain in detail.

In FIG. 2, 7 is a heat exchanger around which a water pipe 8 is wound, 9 is a water supply pipe, and 10 is a hot water supply pipe.

11 is a burner.

Reference numeral 12 denotes a water flow switch which detects the flow of water and operates to ignite the burner 11, and is provided in the middle of the water supply pipe 9.

13 is a water supply pipe 9 leading from the water inlet 14 to the water flow switch 12
The amount of water flowing through only the amount of water necessary for operating the water flow switch 12 is adjusted and regulated by a water flow regulating valve arranged in the water flow switch 12.

Reference numeral 15 denotes a bypass waterway provided to bypass the water flow regulating valve 13, and a normally closed electromagnetic valve 16 is disposed in the bypass waterway 15 to allow a large amount of water to pass through.

Reference numeral 17 denotes a hot water temperature detection thermometer attached to the heat exchanger 7, which detects the hot water temperature at a constant temperature (for example, 40°C) and activates the electromagnetic valve 16.
The idea is to open up.

The present invention has such a configuration, and its operation will be explained next.

Even if the hot water supply switch is fully opened when hot water is being used, only the amount of water necessary for operating the water flow switch 12 is passed through by the water flow regulating valve 13.

Therefore, at the beginning of hot water supply, only a very small amount of water is discharged, and the burner 11 is ignited and burned to heat and raise the temperature.

When the water temperature rises above a certain temperature, the water temperature detection thermometer 17
detects the water temperature and activates the solenoid valve 1 arranged in the bypass waterway 15.
Open 6.

Thus, a large amount of water is supplied into the wood pipe 8, and a large amount of hot water can be obtained as in a conventional water heater.

As described above, the present invention provides a water flow regulating valve in the water supply pipe, and also provides a bypass waterway having a solenoid valve that bypasses the water flow regulating valve, and opens the solenoid valve when the water temperature sensor reaches a certain temperature. This makes it possible to minimize the amount of water discharged at the beginning of hot water supply and maintain the normal usage state after the temperature rises to a certain level, which is extremely effective in saving resources.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing a conventional example, and FIG. 2 is an overall view showing an embodiment of the present invention. 7... Heat exchanger, 9... Water supply pipe, 11
... Burner, 12 ... Water flow switch, 13 ... Water flow regulation valve, 15 ... Bypass waterway, 16 ... Solenoid valve, 17...
Water temperature detection thermo.

Claims (1)

[Scope of utility model registration request] A water supply pipe leading to a heat exchanger is provided with a water flow switch that ignites a burner by a water flow, and a water flow regulating valve that passes only the amount of water necessary for operating the water flow switch is disposed in the water supply pipe, and the water flow regulating valve is provided. A water heater characterized in that a bypass waterway having a solenoid valve is provided to bypass the water heater, and the solenoid valve is opened when a constant temperature is detected by a hot water temperature sensor.