JPS6023624Y2 - Water heater - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a water heater.

(Prior Art and Problems) In a water heater, in order to keep the hot water output temperature constant to some extent due to the hot water supply capacity, the hot water temperature must be adjusted by adjusting the amount of hot water supplied according to the water supply temperature.

Conventionally, the Utility Model Act was developed in 1973 as a means to correct changes in hot water temperature.
There is a system shown in Publication No. 758, which has an overflow prevention valve connected to the piping at the rear of the heat exchanger, which senses changes in the hot water temperature and regulates the flow rate to match the hot water supply capacity. Bunching occurs repeatedly when the inlet water temperature and water pressure change.

In other words, when the hot water temperature is low, the flow rate is throttled, and when the temperature rises to the set temperature in the throttled state, it is fully opened, and when it is fully opened, the capacity is insufficient and the hot water temperature drops again, so the flow rate is throttled down, which is repeated, and the flow rate is controlled and set. This is to obtain a hot water temperature close to that of the hot water.

Therefore, this method does not allow for comfortable hot water supply.

On the other hand, the water supply temperature changes greatly depending on the season, but changes little on a daily basis, and it is practically difficult to adjust the amount of hot water supply according to this water temperature.

Therefore, there was a problem in use due to hot water being discharged in excess of the hot water supply capacity.

The object of the present invention is to solve the above-mentioned problems and provide a water heater that automatically adjusts the amount of hot water to be drawn according to the hot water output capacity of the water heater even if the water temperature and water pressure change.

(Means for solving the problem) In order to achieve this objective, the present invention has the following configuration.

In other words, a pressure reducing valve is installed in the water supply pipe, and an overflow prevention valve is installed between the pressure reducing valve and the heat exchanger that uses a heat sensitive part that senses the temperature of the supplied water to reduce the flow to the minimum flow when the water temperature is low and fully open to the maximum flow when the water temperature is high. It is set up.

(Function) The water supplied to the water supply pipe is maintained at a constant water pressure by the pressure reducing valve.

Next, an overflow prevention valve controls the flow rate according to the water temperature to match the hot water supply capacity.

In other words, when the water supply temperature is low, the flow rate is set to a low flow rate, and when the water supply temperature is high, the flow rate is set to a high flow rate.

The hot water is then heated to the required tap temperature using a heat exchanger, and then the hot water is tapped.

(Example) To explain this example in detail with reference to the drawings, 1 is a water heater equipped with a heat exchanger 2 and a burner 3.

4 is a water supply pipe, 5 is a hot water supply pipe, 6 is a hot water outlet switching valve, 7 is a shower, 8 is a mixing valve, 9 is a bypass pipe that communicates the water supply pipe 4 and hot water supply pipe 5, 10 is a water supply faucet, 11 is a water supply pipe 4 12 is a pressure reducing valve that adjusts the supply water pressure to a constant pressure, and 12 is an overflow prevention valve that is arranged downstream of the pressure reducing valve 11. The valve port 15 is controlled by a valve body 14 connected to a heat sensitive part 13 that senses the water temperature. Open and close to adjust flow rate.

This overflow prevention valve 12 opens and closes the valve body 14 by the expansion and contraction of a heat-sensitive material sealed in the heat-sensitive part 13. For example, when the water temperature is between 1°C and 40°C, the valve port 15 is set to the minimum value corresponding to the hot water supply capacity. The flow rate can be adjusted from the maximum flow rate to 1'C.
When the temperature is 40°C, the valve port 15 is throttled down to the minimum flow rate, and when the temperature is 40°C, it is fully opened to allow the maximum flow rate to flow.

The present embodiment has the above-described configuration, and when the tap 6 is opened, ice is supplied at a constant pressure by the pressure reducing valve 11, and hot water is supplied by heating the heat exchanger 2 through combustion in the burner 3.

When the water temperature is high, such as in summer, the overflow prevention valve 12 is fully opened to supply hot water at the maximum flow rate.

As the water temperature decreases, the flow rate gradually decreases and becomes a flow rate that corresponds to the hot water supply capacity, so the hot water temperature does not drop.

When the water temperature is at its lowest, such as in winter, the flow rate is also at its lowest, and hot water does not come out at a low temperature.

Therefore, the hot water supply temperature used for baths, showers, etc. is required to be above a certain temperature, but according to the present invention, the required hot water temperature can always be obtained, and the problem of low temperature hot water supply due to a drop in water temperature does not occur. .

(Effects of the invention) As described above, this invention provides a pressure reducing valve in the water supply channel to supply water at a constant pressure, and an overflow prevention valve that senses the water temperature and adjusts the flow rate. The flow is set to the minimum flow rate and fully opened to the maximum flow rate when the water temperature is high to ensure that the amount of hot water never exceeds the hot water supply capacity of the appliance, so there is no low temperature hot water output and comfortable hot water use with extremely stable temperature. This is possible.

Further, there is no need to perform any operations for this purpose, and the amount of hot water dispensed is automatically adjusted to suit the season, so there is no need to operate the appliances at all, which has great practical effects.

[Brief explanation of the drawing]

The drawing is an explanatory view of the overall configuration of an embodiment of the present invention. 4... Water supply pipe, 11... Pressure reducing valve, 12
・Song/overflow prevention valve, 13...Heat sensitive part, 14.
... Valve body.

Claims (1)

[Scope of utility model registration request] A pressure reducing valve is installed in the water supply pipe, and an overflow prevention valve is installed between the pressure reducing valve and the heat exchanger that uses a heat-sensitive part that senses the temperature of the supplied water to reduce the flow to the minimum flow when the water temperature is low and fully open to the maximum flow when the water temperature is high. A water heater that is characterized by: