JPH02103320A - Bath device - Google Patents

Abstract

PURPOSE:To ensure stable automatic hot water supply operation by allowing the device to branch from the outlet of a heat exchanger for hot water supply, on one hand, providing a hot water supply flow part for supplying to hot water piping and on the other hand, setting an automatic hot water supply flow part for supplying to a bath to provide a means such as a check valve in the hot water supply flow part. CONSTITUTION:At the operation of automatic hot water supply, an automatic hot water supply closing valve 10 is opened and the hot water heated up to the set temperature in a heat exchanger 7 for hot water supply is supplied in a tank 12 through an automatic hot water supply flow part 11. Because at the time of automatic hot water supply operation, the inside of the tank 12 is in a condition to be open and water flow resistance becomes minimum, the tank 12 is connected to hot water piping of a hot water supply flow part 8, water tends to flow reversely from other hot water supplier 24 whose water feed valve is in a condition to be opened and from a mixture water valve 27 which is in a condition that a water feed part 28 communicates with hot water supply piping 22, but its flow is stopped by a check valve 29. Accordingly, only hot water is supplied from the heat exchanger 7 for hot water supply to the tank 12 to continue normal operation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bath device having an automatic hot water supply function for automatically supplying hot water to a bathtub.

2. Description of the Related Art Conventionally, this type of bath equipment has a structure as shown in FIG. In other words, during hot water supply operation, the hot water tap 1 is
When this happens, water flows in from the water supply connection port 2 and is detected by the water supply detector 3. In response to this signal, the gas solenoid valve 4 and the gas control valve 5 open and the hot water supply burner 6 is ignited.

The hot water heated by the hot water supply heat exchanger 7 is supplied from the hot water faucet l via the hot water supply passage section 8 and the hot water supply connection port 9. Next, during automatic hot water supply operation, the automatic hot water on-off valve l
O becomes "open" and water flowing in from the water supply connection port 2 is heated by the hot water supply heat exchanger 7 in the same manner as during the hot water supply operation.

The heated hot water is supplied into the tank 12 from the automatic hot water supply passage section 11 via the automatic hot water supply on/off valve 1o.

Here, the three-way valve 13 is switched to the tank 12 side, and the pump 14 is operated, and the water flow detector 15 and the reheating heat exchanger 1 are operated.
6. Hot water is supplied into the bathtub 19 via the inlet pipe 17 and bathtub adapter 18. The amount of hot water supplied to the tank 12 is controlled by detecting the water level in the tank 12 with a water level detector 20 and keeping the water level at a certain level with a water flow control valve 21.

That is, the water level detector 20 includes a switch 20a that detects a "low" water level and a switch 21 that detects a "high" water level.
b, and a limit switch 20c that detects an abnormal water level and closes the automatic hot water supply on-off valve 10, each of which outputs an ON signal when the water level rises and an OFF signal when the water level falls.

Here, the amount of hot water supplied to the tank 12 is determined by the switch 21a.

It is controlled by the water flow control valve 21 according to the signal from 21b.
When the "low" switch 21a is turned off, the water flow control valve 21
increases the flow rate, and when the "high" switch 21b is turned on, the flow rate is decreased to maintain a constant water level between the switches 21a and 2Ib.

Problems to be Solved by the Invention However, with the above configuration, the hot water supply pipe 2
2, a hot water supply section 25 such as another water heater 24 in addition to the bath device 23
is connected and its water supply valve 26 is open, or the water supply part 28 of the mixing faucet 27 and the hot water supply piping 22 are in communication, the inside of the tank 12 is open to the atmosphere during automatic hot water supply operation, and there is no water flow resistance. The water that flows backward from the hot water pipe 22 because it becomes the smallest is the water that flows backward from the hot water supply pipe 22 to the hot water supply water supply section 8, the automatic hot water supply water supply section 11,
Hot water flows into the tank 12 through the automatic hot water supply on-off valve 10. As a result, the water level in the tank 12 rises abnormally and the limit switch 20c turns on, causing the automatic hot water supply on-off valve 10 to turn on.
is closed, the hot water in the tank 12 is discharged by the operation of the pump 14, and the "low" switch 20a is turned off, the automatic hot water supply opening/closing valve lO is opened again and the automatic hot water supply operation is restarted, but the above operation is repeated due to the backflow again. Become.

Additionally, the water temperature of the automatic hot water supply also changes depending on the inflow of water, so there was a problem in that the set water temperature could not be maintained.

In view of the above-mentioned problems, the present invention provides a check valve in a part of the hot water supply section of a bath device to prevent backflow from the hot water supply piping into the tank, thereby improving safety and reliability.

Means for Solving the Problems Therefore, the technical means of the present invention for solving the above-mentioned problems consists of a hot water supply heat exchanger, and a hot water supply system that is branched from the outlet of the hot water supply heat exchanger and one of which is supplied to the hot water supply piping. one water passage part, and the other is an automatic hot water supply part that supplies water to the bathtub, and the automatic hot water supply part has an automatic hot water supply opening/closing valve that opens and closes the water passage part, and a tank for separating the water supply part from the bathtub. However, means such as a check valve is provided in a part of the hot water supply water passage section to prevent backflow from the hot water supply piping into the tank.

action The effect of this technical means is as follows.

In other words, by installing a check valve in a part of the hot water supply pipe, it is possible to prevent backflow from other water heaters connected to the same hot water supply piping or from the mixing faucet, thereby preventing water from flowing into the tank. This will prevent this.

As a result, the water level in the tank and the automatic hot water temperature can be maintained in a normal state.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. Note that the same parts as in the conventional example are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained.

In FIG. 1, reference numeral 29 denotes a check valve provided in a part of the hot water supply passage section 8, which is opened for water passage from the hot water supply passage section 8 to the hot water supply pipe 22, and is opened for water passage from the hot water supply pipe 22 to the hot water supply pipe 22. The structure is such that it is closed off to allow water to flow into the sun.

Next, the operation of the configuration of this embodiment will be explained.

In Figure 1, during automatic hot water supply operation, automatic hot water supply on/off valve 1
0 is "open", and the hot water heated to the set temperature by the hot water heat exchanger 7 is passed through the automatic hot water supply passage section 11 and the automatic hot water supply opening/closing valve 1.
Hot water is supplied into the tank 12 through 0.

The amount of hot water supplied to the tank 12 is determined by the switch 21 of the water level detector 2o.
The water flow control valve 21 is controlled by the signals a and 21b, and when the "low" switch 20a is turned off, the water flow control valve 21 increases the flow rate, and when the "high" switch 20b is turned on, the flow rate is decreased and the water flow is controlled by the water flow control valve 21. , 21b to maintain a constant water level. Also limit switch 2
0c controls ONL and automatic hot water supply on-off valve IO to close when the water level rises abnormally.

During automatic hot water supply operation, the inside of the tank 12 is open to the atmosphere and the water flow resistance is the lowest, so the same hot water supply piping 22
Water flows back from another water heater 24 connected to the main water heater 24 with its water supply tap 26 open, or from a mixing faucet 27 in which the water supply section 28 and the hot water supply piping 22 are in communication. However, the check valve 29 stops the flow.

Therefore, only hot water heated to the set temperature by the hot water supply heat exchanger 7 is supplied into the tank 12, and the water level in the tank 12 is also controlled to be kept constant between the switches 21a and 21b, so that it is normal. This will result in continued operation.

As a result, as in the conventional case, water flowing backward from the hot water supply pipe 22 flows into the tank 12 and the water level rises abnormally.
0 is closed and the water level and automatic hot water supply temperature cannot be kept constant.

Effects of the Invention As described above, the present invention prevents backflow from the hot water supply piping into the tank by using a check valve provided in a part of the hot water supply water supply section, thereby ensuring stable automatic hot water supply operation and improving safety. This has the effect of improving reliability.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a bath device according to an embodiment of the present invention,
FIG. 2 is a block diagram of a conventional bath device. 7... Heat exchanger for hot water supply, 8... Hot water supply water passage section, 10... Automatic hot water supply opening/closing valve, 12...
... Tank, 14 ... Pump, 20 ...
・Water level detector, 21...Water flow control valve, 22...
...Hot water piping, 29...Check valve.

Claims (1)

[Claims] A heat exchanger for hot water supply, and one branched from the outlet of the heat exchanger for hot water supply, one of which is a hot water supply passage section that is supplied to the hot water supply piping, and the other is an automatic hot water supply passage section that is supplied to the bathtub, and the automatic hot water supply The water supply section has an automatic hot water supply on/off valve that opens and closes the water supply section, and a tank for separating the water supply from the bathtub, and is provided in a part of the hot water supply section to prevent backflow from the hot water supply piping into the tank. Bath equipment equipped with a check valve or other means to prevent