JPH0260949B2 - - Google Patents

Description

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

Conventional configurations and their problems It is already known that water heaters automatically control the amount of combustion and water to stabilize the temperature of hot water, but in normal conditions, water is supplied at a constant amount for heating. Only a fixed amount of water was supplied at a fixed temperature.

Purpose of the Invention The object of the present invention is not only to keep the water temperature of the water heater constant regardless of the load, but also to change the amount of water over time to provide a pine surge effect when using a shower.

Structure of the Invention To achieve this object, the present invention includes a water flow controller having a drive device, a heat exchanger to which water that has passed through the water flow controller is supplied, and a heat exchanger that controls the flow of water that passes through the water flow controller. a water flow rate detector for detecting water volume, a heating device for heating the heat exchanger, a hot water temperature detector for detecting the temperature of hot water discharged from the heat exchanger, a water volume control unit for sending a signal to the drive device; The signal generating section includes a heating control section that controls a heating controller of the heating device based on a signal from a hot water temperature detector, and a signal generating section that generates a signal whose magnitude continuously changes with the passage of time. The deviation of the signal between the water amount detector and the water amount detector is inputted to the water amount control section.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention is shown in FIGS.
This will be explained using figures. In Fig. 1, reference numeral 1 denotes a water flow controller, which consists of a valve body 2 and a casing 3. Water enters the primary valve chamber 5 from the inlet passage 4, passes through the gap between the water flow control valve 6 and the control hole 7, and passes through the secondary valve chamber. The water flows into the orifice 8, is heated by the heating device 11 in the heat exchanger 10 through the orifice 9, and is supplied to the outside through the outlet pipe 12. The valve shaft 6a of the water flow control valve 6 is screwed to the casing 3, and is connected to the motor 13 and gearbox 14.
The water flow control valve 6 is displaced in the vertical direction in the figure by a driving device 15 consisting of the following. The differential pressure across the orifice 9 is guided to a water flow detector 18 through differential pressure holes 16 and 17, and the water flow detector 18 detects the differential pressure across the water flow orifice 9 and converts it into an electrical signal. Valve body 2 and outlet pipe 1
2 has an inlet water temperature detector 19 and an outlet water temperature detector 20, respectively, the inlet water temperature detector 19 detects the temperature of water before it flows into the heat exchanger 10, and the outlet water temperature detector 20 detects the temperature of water before it flows into the heat exchanger 10. Detects the water temperature. Fuel is supplied from the fuel supply path 21 to the heating controller 22
It is combusted in a heating device 11 regulated by . 23 is a hot water supply controller which inputs signals from the inlet water temperature detector 19 and the outlet water temperature detector 20 and outputs them to the heating controller 22 and the drive device 15.

In the block diagram of Fig. 2, hot water controller 2
3 is composed of a hot water temperature setting section 24, a heating control section 25, a water volume setting section 26, a water volume control section 27, a signal generation section 28, a timer 29, and a differential circuit section 30. The hot water temperature control is performed by calculating signals from a hot water temperature setting section 24 and a hot water temperature detector 20, which are composed of variable resistors, etc., in a heating control section 25, and using a known method.
The heating controller 22 is driven by PID control to adjust the calorific value of the heating device 11 to keep the hot water temperature of the heat exchanger 10 constant. Water amount setting section 26
There is an initial water amount setting section 26a and a re-water amount setting section 26b.
For water flow control, the respective signals from the outlet hot water temperature setting section 24 and the inlet water temperature detector 19 are calculated by the initial water flow setting section 26a, and a drive signal is sent to the drive device 15 via the water flow control section 27, thereby controlling the water flow. The water amount is controlled by the water amount control valve 6 of the vessel 1. The water flow amount controlled by the water amount controller 1 is detected by the water amount detector 18 and fed back to the water amount controller 27. The heating capacity of the heating device 11 (including the capacity of the heat exchanger 10) is set in the initial water amount setting section 26a. In the second control mode of water amount control, the signals from the hot water temperature setting section 24 and the hot water temperature detector 20 are calculated by the rewater amount setting section 26b via the timer 29, and the driving device 15 is driven. The re-water amount setting section 26b compares the signals from the hot water temperature setting section 24 and the hot water temperature detector 20, and drives the drive device 15 to control the water amount. In the third control mode of water volume control, the water volume is controlled over time according to a signal stored in advance in the signal generator 28 that is turned on and off by the switch 31, that is, a signal whose magnitude continuously changes with the passage of time. It changes the

Next, the operation will be explained. When the power is turned on, signals from the outlet water temperature setting section 24 and the incoming water temperature detector 19 are taken in, and calculations are performed in the initial water amount setting section 26a. The initial water amount setting section 26a supplies a proportional signal from a certain reference point to the water amount control section 27 in response to the temperature difference between the hot water setting temperature and the incoming water temperature, and drives the drive device 15 to control the water amount control valve 6 of the water amount controller 1.
Displace the water to initialize the water volume. After that, when the water flow is started by the user, the water flow controller 1
The amount of water flowing through is detected by the water amount detector 18, the signal is compared with the signal from the initial water amount setting section 26a, and the deviation signal is calculated by the water amount control section 27 and the driving device 1
5 to correct the water amount. Combustion in the heating device 11 starts at the same time as the water flows, and after a slight delay, the temperature of the hot water rises. The output hot water temperature deviation with respect to the output hot water temperature setting is calculated by the respective signals of the output hot water temperature setting unit 24 and the output hot water temperature setting device 20 via the timer 29 in the rewater amount setting unit 26b. The timer 29 sets the length of the heating time delay between the heating device 11 and the heat exchanger 10. The re-water amount setting unit 26b activates the drive device 15 to reduce the water amount of the water amount controller 1 if the temperature difference between the set hot water tap temperature and the actual hot water tap temperature is greater than a certain set range.

Due to the small amount of water in the water flow controller 1, the heat exchanger 1
The amount of water flowing to 0 decreases and the temperature of the water increases. In this way, the amount of water is reduced until the tapped water temperature and the set temperature become equal, and the optimum amount of water is obtained, that is, the heating device 11
is the maximum heating amount, and the hot water temperature is controlled to be equal to the set temperature.

If the amount of water is limited by the user, it is necessary to adjust the capacity of the heating device 11 in order to control the temperature of the hot water. In this case, the hot water temperature setting section 24 and the hot water temperature detector 2
The heating controller 25 calculates the deviation of each signal of 0, and the heating controller 22 adjusts the amount of heating so that the hot water temperature is controlled to be equal to the set temperature.

Additionally, if the user changes the hot water temperature setting beyond a certain limit, the water flow control will be reset.
The respective signals of the incoming water temperature detector 19 and the outgoing water temperature setting section 24 are calculated by the initial water amount setting section 26a,
Output to the drive device 15.

After the water temperature has stabilized as described above, when the switch 31 is closed by the user, a signal is generated from the signal generator 28 and transmitted to the drive device 15 via the water flow controller 27. The water flow control valve 6 is rotated forward or reverse. The amount of water is changed by rotating the water amount control valve 6. The amount of water changes one after another depending on the signal sent out by the signal generator 28. Changes in the amount of water are detected by the water amount detector 18 and fed back, so the amount of water changes following the signal from the signal generator 28 regardless of the pressure of the water supply. Since the amount of water changes in this way, 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 preset by the signal generator 28 in accordance with the heating capacity of the heating device 11 so that the amount of change is within a predetermined amount of water.
When the switch 31 is opened, the change in the amount of water stops, and normal hot water supply with a constant amount of water is resumed.

In addition, the signal from the water amount detector 18 is transmitted to the differential circuit section 30 to calculate the rate of change in the amount of water flowing, and the heating control section 25
By adjusting the amount of heat generated by the heating device 11 before a change in hot water temperature occurs, transient changes in hot water temperature can be prevented.

Note that when the heating device 11 is a burner, a fuel control valve is used as the heating controller 22, and when it is an electric heater, a power regulator is used. Water amount detector 18
is not limited to differential pressure detection, and may be any means that can obtain an electrical signal, such as a turbine meter or vortex flow meter. The drive device 15 may be not only a motor but also a solenoid or other device capable of linear drive.

Effects of the Invention As described above, the present invention includes a water flow rate controller having a drive device, a heat exchanger to which the water that has passed through the water flow rate controller is supplied, and a detection of the amount of water passing through the water flow rate controller. a water flow rate detector; a heating device that heats the heat exchanger; a hot water temperature detector that detects the temperature of hot water discharged from the heat exchanger; a water flow control unit that sends a signal to the drive device; A heating control section that controls a heating controller of the heating device based on a signal from a detector, and a signal generation section that generates a signal whose magnitude continuously changes with the passage of time, the signal generation section and the Since the deviation of the signal from the water amount detector is inputted to the water amount control section, it is not only possible to provide a pine surge effect when using a shower, but also effective for washing dishes. Furthermore, transient changes in hot water temperature due to changes in water amount can be prevented by controlling the heating controller based on the rate of change in the signal from the water amount detector, which is of great practical value.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 is a control block diagram showing an embodiment of the invention, and Fig. 3 is a block diagram showing an embodiment of the present invention.
The figure is a graph showing changes in water amount in an example of the present invention. 1...Water flow controller, 10...Heat exchanger, 11...
... Heating device, 15 ... Drive device, 18 ... Water amount detector, 19 ... Incoming water temperature detector, 20 ... Outgoing hot water temperature detector, 22 ... Heating controller, 23 ... Hot water supply controller, 24 ... Hot water temperature setting section, 25... heating control section, 27... water flow control section, 28... signal generation section, 30... differential circuit section.

Claims (1)

[Claims] 1. A water flow controller having a drive device, a heat exchanger to which water that has passed through the water flow controller is supplied, a water flow detector that detects the amount of water that passes through the water flow controller, and the heat exchanger. a heating device for heating, a hot water temperature detector for detecting the temperature of hot water discharged from the heat exchanger, a water flow control section for sending a signal to the driving device, and a heating device for heating the heating device based on the signal from the hot water temperature detector. a heating control section that controls the controller;
A hot water supply control device comprising: a signal generating section that generates a signal whose magnitude continuously changes with the passage of time, and inputting a deviation between a signal between the signal generating section and the water quantity detector to the water quantity controlling section.