JPH0431488Y2 - - Google Patents

Description

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

(Prior art) As shown in Fig. 2, a conventional water heater with reheating function is equipped with a water flow sensor 1 and a fixed water governor 2 in the inlet water passage a, and a heat exchanger in the inlet water passage a. A hot water tap thermistor 4 is provided in the hot water tap side water passage b connected via the vessel 3. Further, downstream of the hot water tap thermistor 4, a bathtub water passage c and another faucet water passage d are branched off, and this bathtub water passage c is provided with a water quantity proportional valve 5.

For example, to control the amount of hot water supplied during automatic bath hot water supply,
A water amount integrating device that adds up the amount of hot water dispensed, a timer that measures the amount of hot water dispensed, and the like are used.

(Problem that the invention aims to solve) In hot water supply amount control devices that use water amount integration devices, timers, etc., water is replenished in response to the remaining water from the previous day in the bathtub or the amount of hot water that has been used. In such cases, the level of remaining water fluctuates greatly, and the setting of the amount of make-up water is left to the user's intuition. As a result, the amount of hot water supplied may be too little or too much, causing the bathtub to overflow.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a water heater with a reheating function that can replenish an appropriate amount of water regardless of the amount of remaining water.

(Means for Solving the Problems) In order to achieve the above-mentioned purpose, the hot water supply device with reheating function according to the present invention connects the lower waterway branched from the middle of the bath water supply waterway connected to the bathtub. It is characterized by being equipped with a water level sensor.

(Example) Hereinafter, a detailed explanation will be given based on an example of a diagram.

FIG. 1 is a water circuit diagram showing an embodiment of the present invention. In Fig. 1, 1 is a water flow sensor, 2 is a fixed water governor, 3 is a heat exchanger, 4 is a hot water tap thermistor,
6 is a water inlet thermistor, 7 is a bypass, 8 is a thermomixing valve, 9 and 10 are three-way valves, 11 is a water level sensor using a semiconductor or the like, and 12 is a bathtub.
Moreover, a is a water passage on the inlet side, and b is a water passage on the outlet side. g is a general hot water supply water passage connected to a hot water tap.

The first three-way valve 9 is a reheating passage c branched from the upstream side of the thermomixing valve 8 of the hot water outlet side water passage b.
and a hot water filling passage d branched from the downstream side, and a function of selecting either one and connecting it to the bathtub side;
It has a function (closing function) of blocking the bathtub 12 from both.

A second three-way valve 10 is interposed between the first three-way valve 9 and the bathtub 12.
The remaining two valve ports of the second three-way valve 10 are connected to the upper water channel e and the lower water channel f, respectively.
It is connected to the bathtub 12 via. This second
A water level sensor 11 that detects the water level in the bathtub 12 is connected to the lower water channel f that connects the three-way valve 10 and the bottom of the bathtub.
will be provided.

At the beginning of automatic hot water supply, the circuit switching of the three-way valves 9 and 10 causes the water to flow in the direction A, passing through the hot water filling passage d and the lower water channel f, and flowing into the bathtub 12.
Hot water is supplied to the bathtub 12 while removing air from the water level sensor 11 side. Then, after a certain period of time has passed, the second three-way valve 10 is switched to change the flow of water to the hot water filling passage d.
and B passing through the upper waterway e, and hot water is supplied to the bathtub 12 while constantly detecting the water level in the bathtub 12 with the water level sensor 11. Thereafter, when the set water level is reached, the water level sensor 11 detects this and stops the water.

(Effects of the invention) As described above, according to the invention, by providing a water level sensor, it is possible to detect the water level in the bathtub and stop the water supply above a predetermined water level. It is possible to keep the water level constant since it is not left up to the user.

In addition, since the water level in the bathtub can be constantly monitored by a water level sensor, it is possible to perform automatic refilling, which starts refilling when the water level falls below a predetermined low value and stops refilling when it reaches the upper limit.

Furthermore, in the initial stage of automatic hot water supply, hot water is supplied to the bathtub via the lower water channel provided with the water level sensor, so that the air in the piping provided with the water level sensor can be completely vented. After the air has been completely removed, the water flow is switched to the upper water channel, making it possible to constantly and accurately detect the water level in the bathtub.

Furthermore, since parts and the like of conventional machines can be used, it is advantageous in terms of mold investment.

[Brief explanation of drawings]

FIG. 1 is a water circuit diagram of an embodiment of the present invention, and FIG. 2 is a water circuit diagram of a conventional example. a...Water inlet side water passage, b...Water outlet side water passage, c
... Passage for reheating, d... Passage for filling hot water, g...
General water supply water passage, 11... Water level sensor, 12...
...bathtub.

Claims (1)

[Scope of utility model registration request] In a water heater that has an additional heating function, the hot water outlet side water passage is branched, and one side is a water passage for bath hot water supply connected to the bathtub, and the other side is a water passage for general hot water supply connected to a hot water tap. It is connected to the bathtub by branching into an upper waterway and a lower waterway, and the lower waterway is equipped with a water level sensor to detect the water level in the bathtub.
Furthermore, the hot water supply device with a reheating function is characterized in that it is provided with a three-way valve that switches the flow of water to the upper waterway after removing air from the lower waterway.