JPH0372902B2 - - Google Patents

Description

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

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

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

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 The present invention allows the amount of water to be varied over time when a water heater is used, and provides a pine surge effect particularly when using a shower. Then, the amount of water before the operation of changing the amount of water over time (hereinafter referred to as water amount fluctuation operation), that is, the initial set water amount, is stored, and after the completion of the water amount fluctuation operation, the water amount is returned to the initial set amount, and the water amount is returned to the initial setting. The purpose is to prevent the temperature from getting too hot or too cold.

Composition of the Invention In order to achieve this object, the present invention provides a temperature controller that controls the temperature of hot water, a water flow controller that controls the amount of hot water supplied, a drive device for the water flow controller, and a device whose size continues to increase over time. and a switch that starts and stops the signal of this signal generator, and makes the amount of hot water supplied before and after sending the signal from the signal generator approximately equal. be.

DESCRIPTION OF EMBODIMENTS A case where an embodiment of the present invention is applied to a gas water heater will be described with reference to FIGS. 2 to 5.

In FIG. 2, reference numeral 1 denotes a water flow controller, and water enters a valve chamber 3 from an inflow path 2, and flows into a primary chamber 6 through a gap between a control valve 4 and a control hole 5. Reference numeral 7 denotes a diaphragm that operates together with the control valve 4, and the other side forms a secondary chamber, and the secondary chamber 8 has a control spring 9 that urges it toward the primary chamber 6.

The water that has flowed into the primary chamber 6 is supplied to a heat exchanger 11 through a valve hole 10a of a water flow control valve 10, heated, and supplied to a hot water outlet pipe 12. The downstream side of the water flow control valve 10 is led to the secondary chamber through a communication hole 13. The water flow control valve 10 is driven by a drive device 16 consisting of a gear 14 and a motor 15. The position of the valve hole 10a changes with the rotation of the water flow control valve 10, and the position of the valve hole 10a changes.
The relationship between the differential pressure and the amount of water passing through 0a changes, and the differential pressure acts on the diaphragm 7, causing the control valve 4
to drive. Reference numeral 17 denotes a signal generator that generates a signal that changes in magnitude over time to drive the drive device 1.
Drive 6.

Reference numeral 18 denotes a set water volume storage unit that stores a signal immediately before the signal generator 17 operates, and supplies a signal to the signal generator 17 in order to return to the initial set water volume after the signal generator 17 completes its operation. do. 19 is a signal generator switch.

On the other hand, gas is supplied from the gas supply path 20 to the temperature controller 2
1, is combusted in a heating device 22, and is heated in a heat exchanger 1.
Heat 1.

Next, the operation will be explained. When water flow is started in FIG. 2, 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 12. As the water flows, a flow switch (not shown) is activated, the heating device 22 starts to burn, and the temperature of the water rises.

Then, the user adjusts the desired amount of water using a faucet or the like (not shown), and sets the temperature of the water to an appropriate temperature using the temperature controller 21. The amount of water at this time is the initial setting amount of water. Afterwards, switch 19 manually or
When the valve is automatically closed, a signal is sent from the signal generator 17 and transmitted to the drive motor 15, causing the water flow regulating valve 10 to rotate forward or reverse. Water volume adjustment valve 10
The rotation of the valve hole 10a changes the restriction of the valve hole 10a.
The differential pressure of 0a acts on the diaphragm 7, drives the control valve 4, and changes the amount of water. The amount of water changes every moment depending on the signal sent by the signal generator 17. At this time, the set water volume storage section 18 stores the water volume immediately before the signal generator 17 operates, that is, the initial set water volume.

Figure 3 shows the temporal changes in water volume. In this way, the amount of water changes from moment to moment, so when used in a shower, it provides a pleasant stimulation and has a pine surge effect. The signal generator 17 controls the degree of change in water amount within a predetermined water amount range according to the capacity of the heating device 22.
It has been set in advance. Further, the set value of the signal generator 17 can be varied so that the user can adjust the predetermined water amount range according to his/her preference.

If the water volume stops changing when the switch 19 is opened, but the set water volume storage unit 18 does not work, the water volume will change from the initial set water volume as shown in A and C in Figure 3 depending on the timing at which the switch 19 is opened. There is a possibility that it will happen. In this case, since the combustion amount of the heating device 22 is constant, if the hot water temperature is stopped at the water flow rate A, which is higher than the initial set water flow rate, as shown in the graph of the hot water outlet temperature change in Figure 5, the hot water temperature will drop and become colder. Become. Additionally, if the water is stopped with a smaller amount of water than the initial setting, the water temperature may increase and become hot.

FIG. 4 shows changes in water volume in the embodiment of the water heater of the present invention. Since the initial set water volume before the water volume fluctuation operation of the signal generator 17 is stored in the set water volume storage unit 18, the switch 19 can be Even if it is opened at the right timing, the water volume will return to the water volume B, which is the same as the initial setting water volume, after the water volume fluctuation operation is completed. Therefore, as shown in the graph B of the hot water outlet temperature change graph in FIG. 5, there is no change in the hot water temperature, and a stable hot water temperature is maintained forever, returning to normal hot water supply with a constant amount of water.

In the embodiment of the present invention, the set water amount storage unit 1
8, the position signal of the water volume control valve 10 is generated by a potentiometer (not shown) and stored. It is also possible to have a configuration in which the information is stored as .

Effects of the Invention As described above, the present invention includes a temperature controller that controls the temperature of hot water, a water flow controller that controls the amount of hot water supplied, a drive device for the water flow controller, and a device whose size continues to increase over time. A signal generator that sends a signal that changes depending on the signal to the drive device, and a switch that starts and stops the signal of this signal generator, and the amount of hot water supplied before and after sending the signal from the signal generator is approximately equal. This not only gives a pine surge effect by stimulating the amount of water when using the shower, but also allows you to maintain a stable water temperature without getting too hot or too cold depending on when you turn off the switch.

Furthermore, since the set amount of hot water does not change, there is no need to adjust the amount of hot water again, making it easy to use.

[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 graph showing changes in water volume when the set water volume storage section is not activated. FIG. 4 is a graph showing the change in the amount of water, and FIG. 5 is a graph showing the change in the hot water temperature. 1...Water flow controller, 16...Drive device, 17...
...Signal generator, 18...Setting water amount storage section, 19...
...Switch, 21...Temperature controller.

Claims (1)

[Scope of Claims] 1. A temperature controller that controls the temperature of hot water, a water flow controller that controls the amount of hot water supplied, a drive device for the water flow controller, and a signal whose magnitude continuously changes over time. A water heating device comprising: a signal generator that sends a signal to the driving device; and a switch that starts and stops the signal from the signal generator, and makes the amount of hot water supplied before and after sending the signal from the signal generator substantially equal. 2. Claim 1, wherein the signal generator has a set water amount storage unit that stores the signal before sending out the change signal.
Water heater as described in section.