JPH0372901B2 - - Google Patents

Description

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

Structure of the conventional example and its problems The water flow rate control of the conventional hot water supply device was to guarantee the hot water temperature, and during normal use, only a constant amount of water was supplied at a constant temperature. Therefore, if a certain amount of stimulation, such as a shower, is preferred, the person will quickly become accustomed to the constant stimulation. In particular, when trying to obtain a pine surge effect by showering, the effect wears off quickly.

OBJECTS OF THE INVENTION The present invention changes the amount of water in a water heater over time to create a pine surge effect when using a shower.

Structure of the Invention To achieve this object, the present invention includes a temperature detector that detects the temperature of hot water, a temperature controller that controls the temperature of hot water according to a signal from the temperature sensor, and a water flow controller that controls the amount of hot water supplied. a driving device for the water flow controller; a signal generator that generates a signal whose magnitude changes continuously over time; a fluctuation control that sends the signal of the signal generator to the driving device; The hot water supply controller is configured to switch between constant control that stops the delivery and constant operation of the drive device at a predetermined time. With this configuration, the flow rate of hot water fluctuates over time and becomes a constant flow rate that is set only during a certain time period.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, reference numeral 1 denotes a water flow controller, in which water enters a valve chamber 3 through an inflow path 2, and flows into a primary chamber 6 through a gap between a control valve 4 and a control hole 5. 7 is control valve 4
A diaphragm that works together with the other side is the secondary chamber 8.
A control spring 9 is placed in the secondary chamber 8 and biased 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 then supplied to a hot water outlet pipe 13 having a temperature sensor 12. The downstream side of the water flow control valve 10 is led to the secondary chamber 8 through a communication hole 14 .
The water flow control valve 10 is driven by a drive device 17 consisting of a gear 15 and a motor 16. Water flow control valve 1
0 changes the position of the valve hole 10a, 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. The rotation angle of the water flow control valve 10 is detected by the position detector 17a.

On the other hand, gas is supplied from the gas supply path 18 to the temperature controller 19.
The heat exchanger 11 is heated by being combusted in the heating device 20 through the heat exchanger 11. 21 is a hot water supply controller which inputs the signals of the temperature detector 12 and the position detector 17a, and which is connected to the drive device 1.
7 and is output to the temperature controller 19.

In the block diagram of FIG.
is composed of a hot water temperature setting section 22, a temperature control section 23, a signal generation section 24, and a holding section 25. The holding section 25 includes a timer section 26, a drive device setting section 27, and a position detector 17a changeover switch 28. To control the hot water temperature, the respective signals from the hot water temperature setting section 22 and the temperature detector 12, which are composed of variable resistors, etc., are calculated by the temperature control section 23, and the well-known method is used.
The temperature controller 19 is driven by PID control to adjust the calorific value of the heating device 20 to keep the hot water temperature of the heat exchanger 11 constant. Signal generator 24
generates a signal whose magnitude continuously changes with time, and in response to this signal, the drive device 17 rotates the water volume control valve 10 of the water volume controller 1 to change the water volume. The changeover switch 28 switches the signal from the signal generation section 24 to the drive device 17 when the timer section 26 operates.
The drive device setting unit 27 and the drive device 17 are connected by cutting off the signal to the drive device setting section 27 and the drive device 17. The drive device setting section 27 sets the drive device 17 according to the magnitude of the deviation signal between the signal from the position detector 17a and the preset state.
to drive.

Next, the operation will be explained. When the power is turned on and water flow starts, combustion of the heating device 20 starts,
After a slight delay, the water temperature will rise. The deviation of the hot water temperature with respect to the hot water temperature setting is determined by the hot water temperature setting section 22.
The signals from the temperature detector 12 and the temperature detector 12 are calculated by the temperature control unit 23, and the temperature controller 19 is controlled to make the hot water temperature equal to the set temperature.

If the operation setting of the timer section 26 is set from the start of hot water supply to a predetermined time, when water flow starts, a signal from the drive device setting section 27 is transmitted to the drive device 17, and the water flow control valve 10 is adjusted to the set position. Rotate. The rotation of the water flow 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, so that the water flow becomes the set value. When a predetermined time has elapsed, the operation of the timer section 26 ends, and the change signal from the signal generation section 24 is transmitted to the drive device 17 by the changeover switch 28, thereby causing the water flow control valve 10 to rotate forward or reverse. Therefore, the amount of water starts to fluctuate as shown in FIG.

Effects of the Invention As described above, the water heater of the present invention includes a temperature detector that detects the temperature of hot water, a temperature controller that controls the temperature of hot water in response to a signal from the temperature detector, and a water volume that controls the amount of hot water supplied. a controller, a drive device for the water flow rate controller, a signal generator that generates a signal whose magnitude changes continuously over time, a fluctuation control that sends the signal of the signal generator to the drive device, and the signal. Since the hot water supply controller is provided with a hot water supply controller that switches over a predetermined period of time between stopping the delivery of water and constant control that keeps the operation of the drive device constant, the following effects can be obtained.

(1) When using a shower, it is possible to give a pine surge effect by changing the amount of water.

(2) It is also possible to stop the water flow rate from changing for a certain period of time and maintain the set water flow rate, so when you want to quickly warm up your body when you start using the shower, or when you want to wash off soap, the water flow rate remains constant without changing. You can take a long shower, and get a comfortable, easy-to-use, and efficient shower.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the water heater of the present invention, FIG. 2 is a control block diagram of the same device, and FIG.
The figure is a characteristic diagram showing changes in water volume of the same device. 1...Water flow controller, 12...Temperature detector, 17
...Drive device, 17a...Position detector, 19...
Temperature controller, 20...Heating device, 21...Hot water supply controller, 22...Hot water temperature setting section, 23...Heating control section, 24...Signal generation section, 25...Holding section, 2
6... Timer section, 27... Drive device setting section, 2
8... Changeover switch.

Claims (1)

[Claims] 1. A temperature detector that detects the hot water temperature, a temperature controller that controls the hot water temperature in response to a signal from the temperature detector, a water flow controller that controls the amount of hot water supplied, a drive device for the water flow controller, and a time controller. a signal generator that generates a signal whose magnitude continuously changes;
a hot water supply controller that switches at a predetermined time between a variable control that sends a signal from the signal generator to the drive device and a constant control that stops sending the signal from the signal generator and keeps the operation of the drive device constant; Equipped with a water heater.