JPH04181B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water flow control device for a water heater.

Conventional configuration and its problems In the field of water heaters, methods for detecting the temperature of hot water and adjusting the temperature and amount of water are already known.

As shown in FIG. 1, it has a burner A, a fuel control valve B, and a heat exchanger C, a temperature detector D that detects the hot water temperature, a comparator E that compares the output of the temperature setting device, and this comparator E. The control valve F and the fuel control valve B of the flow passage are controlled according to the output of the flow channel.

In this conventional example, the amount of water is constant during normal operation, and the amount of water is not changed over time.

OBJECTS OF THE INVENTION An object of the present invention is to change the amount of water from moment to moment when using a water heater, and to provide a pine surge effect particularly when using a shower.

Structure of the Invention In order to achieve this object, the present invention provides a temperature controller that controls the hot water temperature in response to a signal from a heat-sensitive element that detects the hot water temperature, a water flow controller that controls the amount of hot water supplied, and a water flow controller that controls the hot water flow. The motor-operated valve includes motor-operated valves arranged in parallel, and a signal generator that sends a signal whose magnitude changes over time to the motor-operated valve.

DESCRIPTION OF EMBODIMENTS A case in which an embodiment of the present invention is applied to a gas water heater will be described with reference to FIGS. 2 and 3.

In FIG. 2, 1 is a water flow controller, water enters the valve chamber 3 from the inflow path 2, and the flow rate between the control valve 4 and the control hole 5 is 1.
It flows into the primary chamber 6 through the gap. Reference numeral 7 denotes a diaphragm that operates together with the control valve 4, and the other side forms a secondary chamber, and a control spring 9 is attached to the secondary chamber 8 and biases it toward the primary chamber 6. The water that has flowed into the primary chamber 6 is supplied to the heat exchanger 11 through the valve hole 10a of the water flow control valve 10. The downstream side of the water flow control valve 10 is led to the secondary chamber 8 through a communication hole 12 . The water flow control valve is driven by a drive section 15 consisting of a gear 13 and a motor 14. By rotating the water flow control valve 10,
The position of the valve hole 10a changes, the relationship between the differential pressure and the amount of water passing through the valve hole 10a changes, and the differential pressure acts on the diaphragm 7 to drive the control valve 4.
Reference numeral 16 denotes an electric valve having a valve 17, a valve seat 18, and a solenoid 19. When the solenoid 19 is not energized, the valve 17 is closed by a spring 20. It is the signal generator 21 that sends control signals to the water flow controller 1 and the electric valve 16. Further, the signal generator 21 detects the temperature of hot water exiting with a heat-sensitive element 22, and controls a temperature amount regulator 23 such as a gas proportional valve.
A heating device 24 such as a burner that heats the heat exchanger 11
The amount of heating is controlled, and the temperature of hot water discharged from the hot water outlet pipe 25 is adjusted to a set temperature. The electric valve 16 is the water volume regulator 1
are connected in parallel to each other, and the amount of water to the heat exchanger 11 is changed by opening and closing a valve based on a signal from a fluctuation signal generator 21a built in the signal generator 21. The maximum flow rate through the motor-operated valve 16 can be adjusted by the throttle 26.

Next, the operation will be explained. When the water flow is started in FIG. 2, the water that has flowed into the water flow controller 1 passes through the water flow control valve 10, flows into the heat exchanger 11, is heated, and is supplied to the outside from the hot water outlet pipe 25. As the water flows, a flow switch (not shown) is activated, combustion in the heating device 24 begins, and the temperature of the water begins to rise.

The hot water temperature is set according to the user's preference,
The temperature of the water is detected by the heat-sensitive element 22, and the temperature controller 23
The signal generator 21 adjusts the water temperature to stabilize the water temperature.
However, if the set temperature exceeds the heating capacity of the heating device 24, the signal generator 21
A signal is sent to rotate the water flow control valve 10 in the forward or reverse direction. The rotation of the water volume control valve 10 changes the restriction of the valve hole 10a, and the differential pressure across the valve hole 10a acts on the diaphragm 7 to drive the control valve 4, changing the set water volume and adjusting the hot water temperature to the set temperature. Adjust to
Thereafter, when the user turns on a switch (not shown), the electric valve 16 opens and closes in response to a signal sent from the fluctuation signal generator 21a.

Figure 3 shows the temporal changes in water volume. Since the amount of water changes from moment to moment, when used in a shower, it provides a pleasant stimulation and has a pine surge effect. The degree of change in the amount of water is arbitrarily set by signals from the signal generator 21 to the water amount controller 1 and the electric valve 16.
The broken line in FIG. 3 shows the amount of water flowing through the water amount controller 1, and the solid line shows the amount of water flowing into the heat exchanger 11. In this way, the electric valve 1 is connected in parallel with the water flow controller 1.
6, there is an effect that a large change in water amount can be obtained even when the supply water pressure is low. Since the amount of water passing through the electric valve 16 changes depending on the supply water pressure, the amount of water passing through the electric valve 16 is adjusted to an arbitrary maximum amount using the throttle 26.
The minimum water amount is set by adjusting the set water amount of the water amount controller 1 using a signal from the signal generator 21.

Effects of the Invention As described above, the present invention provides a temperature controller that controls the hot water temperature in response to a signal from a heat-sensitive element that detects the hot water temperature, a water flow controller that controls the amount of hot water supplied, and a water flow controller that is connected in parallel with the water flow controller. Since it has an electric valve installed in the electric valve and a signal generator that sends a signal whose magnitude changes over time to the electric valve, the amount of water can be changed moment by moment over time. . Therefore, if you use it in the shower,
A jet of strength similar to that of a shower can be obtained, providing a pleasant stimulation to the skin of the bather, and can be expected to have a pine surge effect.

Furthermore, since an electric valve is provided in parallel with the water flow controller, a larger change in water flow can be obtained even when the supply water pressure is low. Therefore, the skin of the bather is constantly stimulated and a pine surge effect can be expected, resulting in a comfortable shower. By combining it with a water amount controller, arbitrary changes in water amount can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional water heater, FIG. 2 is a block diagram of an embodiment of the water heater of the present invention, and FIG. 3 is a characteristic diagram showing changes in the amount of water in the water heater. 1...Water flow controller, 16...Electric valve, 21...
Signal generator, 22...thermal element, 23...temperature controller.

Claims (1)

[Claims] 1. A heat-sensitive element that detects the hot water temperature, a temperature controller that controls the hot water temperature in response to a signal from the heat-sensitive element, a water flow controller that controls the amount of hot water supplied, and an electric valve that is installed in parallel with the water flow controller. and a signal generator that sends a signal whose magnitude changes over time to the electric valve.