JPS60240944A - Hot water supplier - Google Patents

Abstract

PURPOSE:To avoid the wasteful use of hot water with disregarding of time when supplying hot water into a bath for example by setting the integral flow amounts of hot water from a hot water supplier by a method in which actual flow rate of hot water is known by signals from a flow rate detector for the hot water supplier and integrated with the lapse of time, and a valve is operated. CONSTITUTION:Water is passed through a flow rate detector 23 and supplied through a heat exchanger 3 and a valve 23 from a hot water supply tube 5 to the outside. A lowest ingnition flow rate to be obtained from flow rate signals of the detector 23 and the heating capacity of a heater 8 is calculated in a heating controller 26. When water flows at more than the calculated flow rate, an operation startup signal is sent from the controller 26 to a heating controller 27, and the heat exchanger 3 is heated by the heater 8 to supply hot water. Singnals from the detector 23 are calculated with the lapse of time in an integral flow rate arithmetic unit 28, and when an integral flow rate set by an integral flow rate setter 27 is reached, a stop signal is sent to a valve driver 28 to close the valve 24 to stop the supply of hot water.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater such as a gas instantaneous water heater, and is intended to capture and control the amount of water over time.

Conventional configurations and their problems Traditionally, gas instantaneous water heaters have adopted a method of controlling the hot water temperature that is commonly known as the proportional control method, and it is possible to control the hot water temperature almost completely. It has become to. Conventional examples are shown in FIGS. 1, 2, and 3.

In FIG. 1, water enters a heat exchanger 3 through an inflow path 1) via a hydraulic response device 2, and is supplied to the outside from a hot water outlet pipe 5. The operation of the hydraulic response device 2 will be explained with reference to FIG. Water enters the valve chamber 10 from the inflow path 1, passes through the gap between the control valve 11 and the control hole 12, and flows into the fire chamber 13. 14 is the control valve 11
a diaphragm cooperating with the diaphragm, the back side of which forms a secondary chamber 15, in which there is a control spring 16;
- It is biased toward the firebox 13 side. - The water flowing into the firebox 13 passes through a differential pressure generating body 19 formed by a differential pressure hole 16, a differential pressure valve 17 and a differential pressure spring 18, and is connected to the heat exchanger 3. At this time, a pressure difference (differential pressure) is created between the primary fire chamber 13 and the secondary chamber 15 by the differential pressure communication hole 20, and the receiver is connected to the plate 21 and the rod 2.
2 is used to send signals to the outside. As is well known, the valve configuration shown in the figure also has a governor effect that keeps the water volume approximately constant even if the water pressure increases by 1 level.

Next, the operation of the conventional example will be explained with reference to FIG.

When a certain flow rate or more flows through the water pressure response device 2, an operation start signal is sent to the hot water controller 9, and the heating control unit 11) The exchanger 3 is heated and hot water is discharged. The hot water temperature is determined by the hot water temperature setting section 10.
The heating controller 11 calculates the temperature signal set by the temperature signal and the signal detected by the outlet hot water temperature detector 4, and sends a control signal to the heating controller 7 with feedback so that the two become equal. , which has a configuration commonly called a proportional control system. In actual use, this conventional configuration has made it possible to control the hot water temperature almost perfectly. For example, although a configuration example is omitted, a configuration has also been proposed in which the water volume is automatically reduced to equal the set temperature in order to resolve the temperature drop caused by overflowing water. However, since the amount of water changes due to changes in water pressure, variations in the water pressure response device and water flow controller, and the resistance of the water heater, it is difficult to know the flow rate over time.
It was difficult to control.

OBJECTS OF THE INVENTION The present invention solves these drawbacks, and aims to improve the quality of hot water supply and the ease of use by knowing the actual flow rate and controlling it by integrating it over time.

Structure of the Invention The present invention has a structure in which the actual flow rate is known from the signal of the flow rate detection device of the water heater, and the calculation is performed along with the passage of time, and the on-off valve is operated.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4, 5, and 6. Figure 4 is a configuration diagram of this embodiment, in which water flows through the inflow channel 1.
Flow rate detection device 23? : The water is supplied to the outside from the outlet pipe section 5 via the heat exchanger 3 and the on-off valve 24. FIG. 5 shows the configuration of the flow rate detection device 23.

It is already known that when the permanent magnetic body 23b installed on the impeller 23a is rotated by the flow of water, the magnetoresistive element 23c can capture the magnetic change and detect the rotation speed as a pulse signal. The number has a linear characteristic with respect to the flow rate. Therefore, the flow rate can be determined by measuring the number of pulses.

Next, the operation will be explained using the block diagram shown in FIG.

Based on the flow rate signal from the flow rate detection device 23, the heating control unit 26 determines the minimum ignition flow rate obtained from the heating capacity of the heating device 8.
When the flow rate exceeds the calculated flow rate, the heating control section 2
6 sends an operation start signal to the heating controller 7, and the heating device 8 heats the heat exchanger 3 and taps hot water. The hot water temperature is determined by calculating the temperature signal set by the hot water temperature setting unit 25 and the signal detected by the hot water temperature detector 4 in the heating control unit 26, and sending a control signal to the heating controller 7 so that the two become equal. This is the same configuration as the conventional example. On the other hand, the integrated flow rate calculating section 28 calculates the signal from the flow rate detection device 23, including the elapsed time, and when the integrated flow rate set in the integrated flow rate setting section 27 is reached, a stop signal is sent to the on-off valve drive section 28. Then, the on-off valve 24 is closed to stop tapping the hot water. The integrated flow rate setting unit 27 is equipped with an integrated flow rate release unit in case the integrated flow rate is not specified.
4 is in the open state and a normal hot water supply state can be obtained. Furthermore, when the temperature of the hot water does not reach the set temperature, the opening/closing valve 24 is closed by the timer 30 after a certain period of time has elapsed.

Effects of the Invention According to the present invention, it is possible to set the cumulative flow rate of water dispensed from the water heater, so that, for example, when pouring water into a bathtub, there is no need to forget the time and waste it, thereby saving energy. , and the usability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a conventional example, Fig. 2 is a block diagram showing a hydraulic response part of a conventional example, Fig. 3 is a 10-step diagram showing the operation of the conventional example, and Fig. 4 is an embodiment of the present invention. FIG. 5 is a configuration diagram of the same flow rate detection device, and FIG. 6 is a block diagram showing the same operation. 2: Hydraulic response device, 3. Heat exchanger, 4: Hot water temperature detector, 6: Fuel introduction path, 7: Heating controller, 8: Heating device, 9
．． Hot water supply controller, 10: Hot water outlet temperature setting section, 11: Heating control section, 23: Flow rate detection device, 24/Opening/closing valve, 25: Hot water outlet temperature setting section, 26: Heating control section, 27: Integrated flow rate setting section,
28: Integrated flow rate calculation unit, 29: Opening/closing valve drive unit, 30: Timing device, 31: Hot water supply controller. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure, 9

Claims (3)

[Claims] (1) a flow rate detection device provided on the inlet side of a water passage, a heat exchanger connected to the flow rate detection device, a heating device for the heat exchanger, and a heating controller that controls the heating device;
a hot water temperature detector provided on the outlet side of the heat exchanger;
An on-off valve provided behind the outlet hot water temperature detector, an outlet temperature setting unit, an integrated flow rate setting unit, an integrated flow rate calculation unit, an on-off valve drive unit that controls the on-off valve, and a heating control that controls the heating controller. The controller includes a hot water supply controller consisting of a flow rate detection device, a signal from the hot water output temperature setting unit, and a signal from the hot water temperature detector to start and stop combustion and control the hot water temperature, and to set the cumulative flow rate. The integrated flow rate calculation unit calculates the integrated flow rate based on the signal from the unit and the signal from the flow rate detection device, and the integrated flow rate calculation unit transmits a signal to the opening/closing valve drive unit when the set integrated flow rate is reached, and controls the opening/closing. A water heater. (2) The water heater according to claim 1, wherein the cumulative flow setting section includes a cumulative flow canceling section. (3) The water heater according to claim 1, wherein the on-off valve is closed via a timer when the set temperature is not reached.