JPH02126030A - Hot water feeder - Google Patents

Abstract

PURPOSE:To supply water from a bypass water passage when a fed-out hot water temperature exceeds a certain temperature and then enable discharge of a not water to be prevented with a less-expensive simple configuration by a method wherein a water solenoid valve controlled by a temperature sensor signal and a bypass water passage bypassing a heat exchanger are provided. CONSTITUTION:When a hot water feeding plug 3 is opened, a water flow switch 7 is closed. This signal is received and outputted to each of a solenoid valve 8 and igniter 10, respectively. Fuel is supplied to a burner 11 to perform a spark discharging and then combustion is carried out. This combustion flame is detected by a flame detector 12, a signal is sent from the flame sensor 12 to a controller 15 and then the spark discharging is stopped from the igniter 10. Water supplied by opening of the hot water feeding plug 3 with combustion flame of a burner 11 is converted into hot water through a heat exchanger 5, it passes through a hot water feeding pipe 4 and then is supplied to the hot water feeding plug 3. At this time, as the temperature of fed hot water becomes more than a certain temperature through a temperature sensor 14, the water solenoid valve 6a is opened with a signal from a controller device 13, it passes through a bypass water passage 6b, the water is supplied to the hot water feeding plug 3 and so hot water hotter than a certain degree may not be fed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater that uses gas combustion or the like as a heat source.

2. Description of the Related Art A schematic configuration diagram of a conventional water heater is shown in FIG. 2. In FIG. 2, 1 is a shower head, 3 is a hot water tap, 4 is a hot water supply pipe, 5 is a heat exchanger, 7 is a water flow switch, 8 is a solenoid valve, 9 is a proportional valve, 10 is an igniter, 11 is a burner, 12 is a flame detector, and X3 is a control device.

When a shower is required, a signal is output from the water flow switch 7 by opening the hot water tap 3, and upon receiving this signal,
The control device 13 outputs signals to the electromagnetic valve 8, the proportional valve 9, and the igniter 10, respectively, and the burner 11 performs combustion. The combustion flame of the burner 11 is detected by the flame detector 12, and a signal is sent from the flame detector 12 to the control device 13.
3 sends a stop signal to the igniter 10. Due to the combustion flame of the burner 11, the water that flows into the water heater when the hot water tap 3 is opened is converted from water to hot water by the heat exchanger 5, and the temperature sensor 14 provided in the hot water supply piping 4 and the control device 13 The water comes out from the shower head 1 at a temperature determined by the proportional valve 9.

Problems to be Solved by the Invention However, in the conventional configuration described above, the amount of gas combustion is varied by feed-hacking the temperature sensor, so when the hot water tap is turned down, hot water comes out at a high temperature, which is extremely dangerous. Ta.

The present invention solves these problems and provides a hot water supply device that is inexpensive and has a simple configuration and can prevent hot water from flowing out at a high temperature.

Means for Solving the Problems To solve the above problems, the water heater of the present invention includes a hot water tap, a hot water pipe, a water flow switch that closes when the hot water tap is opened, and a valve that opens when the water flow switch is opened. a solenoid valve for supplying fuel; an igniter for igniting the fuel;
A burner and a flame detector for combustion, a heat exchanger for exchanging heat generated by combustion of the burner to supplied water, a temperature sensor provided in the hot water supply pipe, and a temperature sensor signal. The system is composed of a water electromagnetic valve controlled by a water solenoid valve, a bypass waterway that bypasses the heat exchanger, and a control device that controls each of the components.

Function According to the water heater with the above configuration, even when the hot water tap is throttled and the water volume decreases, the bypass solenoid valve is opened by the signal from the temperature sensor without the need for a proportional valve or a complicated control device, and high temperature is emitted from the hot water tap. It is possible to provide a water heater that does not produce hot water at a low cost.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. FIG. 1 shows a schematic configuration diagram of a water heater according to an embodiment of the present invention.

In Figure 1, 3 is a hot water tap, 4 is a hot water supply pipe, 5 is a heat exchanger, 6a is a water solenoid valve, 6b is a bypass waterway, 7 is a water flow switch, 8 is a solenoid valve, 10 is an igniter, and 11 is a burner. ,
12 is a flame detector, 13 is a control device, and 14 is a temperature sensor.

When the hot water tap 3 is opened, the water flow switch 7 is closed, and in response to this signal, the control device 13 controls the solenoid valve 8 and the igniter 10.
Signals are output to the burner 11, fuel is supplied to the burner 11, spark discharge occurs, and combustion occurs. This combustion flame is detected by the flame detector 12, and a signal is sent from the flame detector 12 to the control device 13, and as a result, spark discharge from the ignition 10 is stopped. The water supplied by the opening of the hot water tap 3 due to the combustion flame of the burner 11 is converted from water to hot water by the heat exchanger 5, and is supplied to the hot water tap 3 via the hot water piping 4. At this time, when the hot water supply temperature exceeds a certain temperature according to the temperature sensor 14 provided with the hot water supply pipe 4, the water solenoid valve 6a is opened in response to a signal from the control device 13, and the bypass water pipe 6b is opened.
After that, water is supplied to the hot water tap 3, and the hot water is not heated above the above-mentioned temperature.

Effects of the Invention As described above, according to the hot water supply device of the present invention, when the hot water temperature exceeds a certain temperature, water is supplied from the bypass waterway, and hot water is not supplied above the above-mentioned certain temperature.

Therefore, it is possible to prevent burns caused by hot water being poured out, which is extremely advantageous in practice.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a water heater using gas combustion as a heat source, which is an application example of the present invention, and FIG. 2 is a configuration diagram of a conventional water heater using gas combustion as a heat source. 1...Shower head, 3...Hot water tap, 4...Hot water supply piping, 5...Heat exchanger,
6a...Water solenoid valve, 6b...Bypass waterway, 7...Water flow switch, 8...Solenoid valve, 10...Igniter , 11... Burner, 12... Flame detector, 13... Control device, 14... Temperature sensor. Name of agent: Patent attorney Shigetaka Awano Haka 1 person 7 - Ki Fumi Sui 5. f 8-Electromagnetic box 10-one size/J--Piece-Six temperature immersion dump b Fig.

Claims (1)

[Claims] A hot water supply tap, a hot water supply pipe, a water flow switch that is closed when the hot water supply tap is opened, a solenoid valve for fuel supply that is opened when the water flow switch is closed and closed, and an igniter for igniting the fuel; A burner for combustion, a flame detector, a heat exchanger for exchanging heat generated by combustion of the burner to supplied water, a temperature sensor provided in the hot water supply pipe, and the temperature sensor. A water heater comprising a water solenoid valve controlled by a signal, a bypass waterway that bypasses the heat exchanger, and a control device that controls each of the components.