JPH0293218A - Hot water supply apparatus for bath - Google Patents

Abstract

PURPOSE:To halt the hot water feed to a bath when hot water supply to an another place is carried out while the hot water feed to the bath is under way, by a method wherein a bypass pipe with a bypass on-off valve is divided from the inlet side of a flow control valve installed at the inlet of a hot water supply heat exchanger, and connected to the middle of a hot water supply pipe on which a check valve is furnished upstream the junction. CONSTITUTION:At the outlet of a hot water supply heat exchanger 7, a flow control valve 22 is furnished. A bypass pipe 24 with a bypass on-off valve 25 is furnished between the inlet side of the flow control valve 22 and a hot water supply pipe 8 which is provided with a check valve 26 upstream the junction with the bypass pipe 24. When an automatic hot water feed operation switch is turned on, a hot water supply on-off valve 10 and the bypass on-off valve 25 are opened, and water is supplied through the flow control valve 22 and the hot water supply on-off valve 10 to a tank 12 after heated by the heat exchanger 7. When a hot water faucet 1 is opened while the hot water feeding to the tank 12 is under way, the hot water flows along the bypass pipe 24, causing the flow switch 23 to be turned on and the hot water supply valve 10 and the bypass on-off valve 25 to be closed, so that the hot water feeding to the bath is halted, and the hot water is supplied through the flow control valve 22 only to the hot water faucet 1. When the hot water faucet 1 is closed, the flow switch 23 is turned off and the hot water supply on-off valve 10 is opened to supply the hot water to the tank 12. And the bypass on-off valve 25 returns to the open position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bath water supply 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 water heater has a structure as shown in FIG. In other words, during hot water supply operation, the hot water tap 1 is
When set to ``Open'', water flows in from the water supply connection port 2 and is detected by the flow rate sensor 3, after which the gas solenoid valve 4 and the gas control valve 5 open and the hot water supply burner 6 is ignited. Here, the hot water heated by the hot water supply heat exchanger 7 passes through a hot water supply path 8 and a hot water supply connection port 9 to a hot water tap.
hot water is supplied.

Next, during the automatic hot water supply operation, when the automatic hot water supply operation switch (not shown) is turned on, the automatic hot water supply on/off valve 10 is opened, and the water flowing in from the water supply connection port 2 is heated to heat for hot water supply as in the hot water supply operation described above. It is heated in exchanger 7. This heated hot water is supplied to the tank 12 via the automatic hot water supply path 11 and the automatic hot water supply opening/closing valve IO. Here, the three-way valve 13 is connected to the tank 1.
2 side, the pump 14 operates, and the tank 12
For the hot water inside, there is a bath water flow switch 15, and a heat exchanger 1 for reheating.
6. Hot water is poured into the bathtub 19 via the outgoing pipe 17 and the bathtub adapter 18. Furthermore, in order to keep the water level in the tank 12 almost constant, the water level is detected by the float part 21a1 and the float part 21b of the liquid level detector 21, and the opening/closing degree of the water flow control valve 22 is adjusted in conjunction with the signal from the flow rate sensor 3. Ru.

Next, while hot water is being filled into the bathtub, when the hot water tap 1 is turned ``open'', the hot water flows through the automatic hot water supply path 11 and the hot water supply path 8.
However, if hot water is also supplied to the tank 12 side in this way, the flow rate flowing to the hot water supply path 8 is reduced by almost half, and as a result, a sufficient amount of hot water cannot be obtained from the hot water tap 1. In order to prevent this, the hot water supply water amount switch 23 provided in the hot water supply path 8 detects the amount of hot water and turns "ON", and at the same time the automatic hot water supply on/off valve 10 becomes "closed", and the hot water is poured into the tank 12 by the control means. Since the system is temporarily on standby, a sufficient amount of hot water is supplied from the hot water faucet l. Next, when the hot water tap 1 is closed, the hot water supply water flow switch 23 is turned off, and the automatic hot water on-off valve 10 is turned off to release the temporary standby state for pouring hot water into the tank 12 by the control means. ”, and hot water continues to be poured into the bathtub 20.

Problems to be Solved by the Invention However, with the configuration as described above, even if the hot water tap l is opened while hot water is being poured into the bathtub 19, that is, while hot water is being poured into the tank 12, Under the conditions described below, if the amount of water passing through the hot water supply switch 23 is too small, this switch 23 will
N, and as a result, the automatic hot water supply on-off valve 10 may not be closed.

(11 When the water volume control valve 22 is in a throttle state to maintain the water level in the tank 12 at a constant level, and the water volume is low.

(2) The hot water tap 1 is placed in a higher position due to the appliance body (for example, a shower tap in a bathroom or a hot water tap installed on the second floor)
When there is.

Under the above conditions, since hot water is also being poured into the tank 12, a problem has arisen in that a sufficient amount of hot water cannot be dispensed from the hot water tap l.

The present invention solves the above-mentioned problems of the prior art, and is designed to ensure that when hot water is being supplied elsewhere while filling a bathtub with hot water, the hot water filling operation is reliably placed on temporary standby in order to ensure the amount of hot water being supplied. purpose.

Means for Solving the Problems In order to solve the above problems, the bath water heater of the present invention includes a flow rate sensor for detecting the flow of water provided on the inlet side of the hot water heat exchanger, and a flow rate sensor for detecting the flow of water provided on the inlet side of the hot water heat exchanger. Installed on the exit side,
A water flow control valve that controls the amount of water entering the appliance body, a hot water supply path that branches off from the outlet of this water flow control valve and supplies water to the hot water faucet on one side, and an automatic hot water supply on/off valve that supplies hot water to the bathtub on the other. Farewell to the automatic hot water supply route. A bypass path is provided that branches from the inlet side of the water flow control valve and leads to the hot water supply path, and a bypass opening/closing valve is provided in this bypass path, and a reverse hot water path is provided in the hot water supply path upstream from the confluence of the bypass path with the hot water supply path. A stop valve is provided, and a water flow switch for hot water supply is provided downstream from the confluence point, and when the automatic hot water supply switch is set to rONJ, the automatic hot water supply on/off valve and the bypass on/off valve are in the open state, and in this state, the hot water tap is opened. When the hot water supply water flow switch is turned on, the automatic hot water supply on-off valve and the bypass on-off valve are put in the closed state, and the automatic hot water supply is put on standby, thereby giving priority to hot water supply use. .

Effects According to the present invention, with the above-described configuration, when the hot water tap is opened during the hot water supply operation, the hot water supply operation is put into a temporary standby state, hot water supply is prioritized, and a sufficient amount of hot water can be obtained.

EXAMPLE Hereinafter, a bath water heater according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a bath water supply device in an embodiment of the present invention. 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, a water flow control valve 22 is located on the outlet side of the hot water supply heat exchanger 7, and a bypass path 24 branches from the inlet side of the water flow control valve 22 and connects the other end to the hot water supply path 8. are doing. 25 is a bypass opening/closing valve provided in the bypass path 24, and 26 is a check valve for preventing backflow provided in a portion 8a of the hot water supply path 8 before the portion to which the bypass path 24 is connected.

Next, the operation of the configuration of this embodiment will be explained. In FIG. 1, when the automatic hot water supply operation switch (not shown) is turned on, the automatic hot water supply on-off valve 10 and the bypass on-off valve 25 are opened, and the water flowing in from the water supply connection port 2 is heated by the hot water supply heat exchanger 7. , water flow control valve 22, automatic hot water supply path 1
Hot water is supplied to the tank 12 through the hot water supply valve 1 and the automatic hot water supply on/off valve 10. At this time, the bypass on-off valve 25 is in the "open" state, but since the hot water supply path 8 is provided with a check valve 26, the hot water from the bypass path 24 does not pass through the water flow control valve 22 and enters the tank. It will not flow back to 12.

Next, when the hot water tap l is opened during the hot water filling operation state, hot water flows into the bypass passage 24 on the inlet side of the water flow control valve 22. Since the water flow control valve 22 is not throttled, a sufficient amount of hot water flows into the hot water supply path 8, turning the hot water supply water flow switch 23 on. "On" like this
When the automatic hot water supply on/off valve 10 is turned on by the control means 27,
is closed, and in conjunction with the automatic hot water filling operation entering a temporary standby state, the bypass on-off valve 25 also becomes "closed".

Therefore, the amount of hot water controlled by the water flow control valve 22 is supplied only from the hot water tap 1.

In addition, when the hot water tap l is turned "closed", the water flow switch 23 for hot water supply
In order to restart the automatic hot water filling operation that was in standby mode at -, the automatic hot water supply on/off valve 10 is turned "open" and hot water is supplied to the tank 12, and in conjunction with this, the bypass is activated. The on-off valve 25 also returns to the "open" state.

Effects of the Invention As described above, the present invention provides a bypass passage branched from the inlet side of a water flow control valve provided on the outlet passage side of a hot water supply heat exchanger and connected in the middle of the hot water supply passage, and a bypass opening/closing valve installed in this bypass passage. A check valve is installed in the hot water supply path before the bypass path is connected, so if the hot water tap is opened during hot water supply operation, the hot water tap will be located at a higher position than the main body of the appliance, such as a bathtub. Even when you are in the shower, on the second floor, or when the water flow control valve is in the throttle state, a sufficient amount of hot water flows through the bypass path, so the automatic hot water filling operation goes into a temporary standby state and the hot water tap is turned off. A more sufficient amount of hot water can be obtained.

Furthermore, since the bypass path is provided on the outlet side of the heat exchanger for hot water supply, there is no problem such as instantaneous flow of cold water from the hot water tap.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a bath water supply apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional bath water supply apparatus. 3...Flow rate sensor, 8...Hot water supply path,
10...Automatic hot water supply on/off valve, 11...Automatic hot water supply path, 23.Old...Water flow switch for hot water supply, 24...
...Bypass path, 25...Bypass opening/closing valve, 2
6...Check valve. 7-Ring thirst-cross 1 bloom Δ 8- Hot water supply path 8a, --partial? 4°-by-lzu-path z7-・-controlling child

Claims (1)

[Claims] A flow sensor installed on the inlet side of the hot water supply heat exchanger to detect the flow of water, a water flow control valve installed on the outlet side of the hot water supply heat exchanger to control the amount of water entering the appliance body, and this water flow control valve. Branching from the outlet of the valve, one is a hot water supply path that supplies hot water to the hot water faucet, and the other is an automatic hot water supply path that supplies hot water to a bathtub, etc. and is equipped with an automatic hot water supply on/off valve, and branches from the inlet side of the water flow control valve. A bypass passage leading to the hot water supply passage and a bypass opening/closing valve are provided in this bypass passage, and a check valve is provided in a portion of the hot water supply passage upstream from the point where the bypass passage is connected, and a hot water supply passage downstream from the said portion is provided. Equipped with a water flow switch for hot water supply,
When the automatic hot water supply switch is turned on, the automatic hot water on-off valve and the bypass on-off valve are opened, and when the hot water faucet is opened in this state, the water flow switch for hot water supply is turned on, and the water flow switch is turned on. This bath water heater is equipped with a control means that gives priority to hot water supply use by closing the automatic hot water supply on-off valve and the bypass on-off valve and placing automatic hot water supply on standby.