JPS62284143A - Hot water supplying apparatus - Google Patents

Abstract

PURPOSE:To increase convenience in the use of a hot water supplying apparatus, by providing a critical flow comparator which compares a signal from a total flow accumulator with a signal from a critical flow setter, and by providing an alarm buzzer which sounds an alarm by a signal from the critical flow comparator. CONSTITUTION:If some refuse flowing in a hot water clogs in a flow controlling valve 11, or the sealing ability of a valve is deteriorated, the valve 11 is not completely closed and water leaks out of the valve, so that feeding of water to a bathtub 12 is continued, notwithstanding that feeding of hot water is completed and the valve 11 is controlled to be closed. In such a case total flow accumulator 22 continues accumulating signals from a flow detector 8 by the intermediary of a flow adder 21, and is outputs signals to a critical flow comparator 25. When the value of signals from the total accumulator 22 reaches a predetermined value set by a critical flow setter 24, the critical flow comparator 25 outputs a signal to an alarm buzzer 20. The alarm buzzer 20 is actuated to be sounded to inform the extraordinary state of a flow controlling valve 11. An alarm is sounded also when a water leaks and the amount of leak reaches a value set by the cricical flow setter 24.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to the control of pumped water supply devices such as water heaters and electric water heaters.

2. Description of the Related Art Conventionally, this type of water pumping and supplying device, as shown in FIG. 2 and
A comparator 3 that generates an output when the value of the signal from the integrator 2 reaches a value A predetermined as the value at which the water supply should be stopped, a water supply temperature sensor 4 that detects the temperature of the water supply, and a water supply amount control unit 5 , a control section 6, and a water heater that burns fuel F to supply hot water HW.

To explain the operation of the conventional example configured in this way, for example, when supplying a certain amount of hot water to a bathtub or the like, the water heater 7
When water supply starts, the flow rate sensor 1 supplies a flow rate signal to the integrator 2 at the same time as water supply starts. The integrator 2 integrates this flow rate signal and supplies the integrated signal to the comparator 3.

Comparator 3 generates an output when the value of the integrated signal reaches a predetermined value A. As a result, the control section 6 receives the signal from the comparator 3 and controls the water supply amount control section 5 to stop the water supply. Therefore, hot water supply can be stopped when the integrated signal reaches a predetermined value A, and by changing this value A, the total amount of hot water supplied by the hot water supply HW can be arbitrarily set.

(For example, Japanese Unexamined Patent Publication No. 57-127741) Problems to be Solved by the Invention However, in the above configuration, the flow path closing unit used in the water supply amount control unit 5 when supplying a certain amount of hot water to the bathtub If the valve is clogged with foreign matter such as dust flowing in the fluid, there is a problem in that the flow path shutoff valve remains open even when the integrated signal reaches a predetermined value A. A similar problem of hot water supply being left unattended also occurs when the sealing performance of the flow control valve deteriorates.

The present invention solves this conventional problem, and uses an alarm generator to notify you of the abnormality when the flow path on-off valve is clogged with foreign matter or when the sealing performance of the flow path on-off valve deteriorates and hot water supply is not stopped. The purpose is to improve usability.

Means for Solving the Problems In order to solve the above problems, the roaring water supply device of the present invention has the following features:
It consists of a limit cumulative flow rate setting device, a limit cumulative flow rate comparator, a cumulative flow rate calculator, and an alarm generator.

Operation The present invention compares the signal of the integrated flow calculator with the setting value of the limit integrated flow setting device when the flow rate on-off valve is not completely closed and hot water supply continues due to the above configuration, and the signal from the integrated flow calculator is calculated. This solves the conventional problem by activating an alarm generator with the signal from the limit integrated flow rate comparator to notify an abnormality when the signal reaches the set value of the limit integrated flow rate setting device.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a diagram of the hot water supply system. In FIG. 1, 8 is a flow rate detector that detects the flow of water and outputs a pulse signal proportional to the flow rate, and 9 is a heat exchanger that heats the supplied water. The hot water coming out of the heat exchanger 9 is sent to the vacuum breaker valve 1o.
and is piped to the bathtub 12 via the flow rate control valve 11. On the other hand, a pipe is also connected to a faucet 13 of the bathtub from the middle of the pipe. 14 is a burner whose gas amount is controlled by a gas control valve 15. 16 is a temperature sensor provided on the outlet side of the heat exchanger 9, and 17 is an integrated flow rate setting device provided in the bathroom to arbitrarily set the amount of hot water to be supplied to the bathtub.

18 is a general controller which controls the heat exchanger 9, burner 14,
It is comprised of a controller (not shown) that controls a heat source 19 consisting of a gas control valve 15 and a remote controller that controls hot water supply. 20 is an alarm generator.

FIG. 2 is a block diagram for controlling the hot water supply system.

In FIG. 2, numeral 21 is a flow rate calculator that calculates the signal from the flow rate detector 8 into a flow rate, and 22 is an integrated flow rate calculator that integrates the signal from the flow rate calculator. 23 is an integrating unit that compares the signals of the integrated flow rate setting device 17 and the integrated flow rate calculator 22 and generates an output when the value of the signal of the integrated flow rate calculator 22 reaches a preset value of the integrated flow rate setting device 17. It is a flow rate comparator. Reference numeral 24 denotes a limit cumulative flow rate setter for setting the maximum amount of hot water supply, and 25 denotes a limit cumulative flow rate comparator that compares the signal from the limit cumulative flow rate setter 24 and the signal from the cumulative flow calculator 22.

Reference numeral 26 denotes a water supply amount control section that includes a flow rate calculator 21, an integrated flow rate calculator 22, an integrated flow rate comparator 23, a limit integrated flow rate setter 24, and a limit integrated flow rate comparator 2S.

Next, the operation of the above configuration will be explained with reference to FIGS. 1 and 2. For example, when supplying hot water 1504 to the bathtub 12 with the heat source 19, the integrated flow rate setter 17 is first set to 1504. In this state, water passes through the flow rate detector 8, becomes hot water in the heat exchanger 9, and passes through the open flow rate control valve 11 to the bathtub 12.
Hot water is supplied from below. At this time, a pulse signal outputted from the flow rate detector 8 and proportional to the flow rate of the waste water is subjected to a flow rate calculation by a flow rate calculator 21, and the signal is sent to an integrated flow rate calculator 22, where it is integrated. The signal from the integrated flow rate calculator 22 is constantly sent to the integrated flow rate comparator 23 and compared with the value of the integrated flow rate setter 17. When the amount of hot water to be supplied approaches 15 (l) and the value of the signal from the integrated flow rate calculator 22 reaches a preset value of the integrated flow rate setting device 17, a signal is output from the integrated flow rate comparator 23 to the flow rate control valve 11. As a result, the flow rate control valve is closed and the supply of 15 (liters) of hot water is completed.A motor-driven electric valve or a solenoid valve is used as the flow rate control valve 11.The flow rate control valve 11 is closed when the hot water supply is completed. At this time, if the valve part is clogged with debris flowing in the fluid, or if the sealing performance of the valve part deteriorates, the flow control valve 11 will not be completely closed and the flow rate control valve 11 will leak, preventing hot water from continuing to be supplied to the bathtub 12. In such a state, the signal from the flow rate detector 8 is passed through the flow rate calculator 21 to the integrated flow calculator 22, which performs integration calculation, and then generates a signal to the limit integrated flow comparator 25. Flow rate calculator 2
When the value of the signal No. 2 reaches the preset value of the limit integrated flow rate setting W24, a signal is output from the limit integrated flow rate comparator 25 to the alarm generator 20, and the alarm generator 20 is activated to detect an abnormality in the flow rate control valve 11. Let me know.

In this embodiment, an abnormality occurs in the flow control valve 11,
Even if water leaks after the flow rate control valve 11 performs a closing operation, an alarm will be generated when the set value of the limit integrated flow rate setting device 24 is reached to notify of an abnormality, thereby preventing overflow from the bathtub. It has an effect.

Next, a second embodiment of the present invention will be described with reference to FIG.

FIG. 3 is a block diagram for controlling the hot water supply system. 27 is a flow rate detector, and the signal of the flow rate detector 27 is sent to the flow rate calculator 2.
8 to the integrated flow rate calculator 29. The signal from the integrated flow rate calculator 29 is sent to the integrated flow rate comparator 3o and the limit integrated flow rate comparator 31. 32 is a limit integrated flow rate setter, and this signal is sent to the limit integrated flow rate comparator 31.

Reference numeral 33 denotes a flow rate control valve, which is installed in the hot water supply pipe and is activated by signals from the cumulative flow rate comparator 30 and the limit cumulative flow rate comparator 31. 34 is a heat source, and 35 is a hot water supply amount controller. 36 is an integrated flow rate setting device.

Next, the operation in the above configuration will be explained.

The operation during normal supply of a certain amount of hot water is the same as that of the previous embodiment, and its explanation will be omitted. Now that a certain amount of hot water has been supplied, the flow control valve 3
3 is closed, if the flow control valve 33 is not completely sealed due to debris clogging and hot water continues to be supplied, the flow rate control valve 33 is closed.
7 detects the flow rate, and the cumulative flow rate calculator 29 continues the cumulative calculation. When the value of the signal from the integrated flow rate calculator 29 reaches the preset value of the limit integrated flow rate setting device 32, a signal is output from the limit integrated flow rate comparator 31 to the flow rate control valve 33, and the flow rate control valve 33 is restarted. Perform the action.

That is, if a solenoid valve or an electric valve is used as the flow rate control valve 33, it is opened again and then closed.

In this embodiment, when the flow rate control valve 33 is clogged with dust, etc., the flow rate control valve 33 is opened again to allow the dust to flow out and then closed, making it possible to improve the reliability regarding stopping the hot water supply. becomes.

Next, a third embodiment of the present invention will be described using FIG. 4.

FIG. 4 is a block diagram for controlling the hot water supply system. 37 is a flow rate detector, and the signal of the flow rate detector 37 is sent to the flow rate calculator 3.
8 to the integrated flow rate calculator 39. The signal from the integrated flow rate calculator 39 is sent to an integrated flow rate comparator 40 and a limit integrated flow rate comparator 41. 42 is a limit integrated flow rate setter, and this signal is sent to the limit integrated flow rate comparator 41.

Reference numeral 43 denotes a first flow rate control valve, which is operated by a signal from the integrated flow rate comparator 40. Reference numeral 44 denotes a second flow rate control valve, which is operated by a signal from the limit integrated flow rate comparator 41. 45 is an integrated flow rate setting device, 46 is a hot water supply amount controller, and 47 is a heat source.

Next, the operation in the above configuration will be explained. When hot water is being supplied, the first flow control valve 43 and the second flow control valve 44 are in an open state. Here, when the value of the signal from the integrated flow rate calculator 39 reaches the preset value of the integrated flow rate setting device 45, a signal is sent from the integrated flow rate comparator 40 to the first control valve 43.
The first flow rate control well 43 is closed and hot water supply is stopped.

When the first flow rate control valve 43 is closed, if it is not completely sealed due to dirt clogging or poor sealing performance and hot water supply continues, the flow I detector 37 detects the flow rate and the integrated flow rate calculator 39 Continue the integration calculation.

When the value of the signal from the integrated flow rate calculator 39 reaches the preset value of the limit integrated flow rate setter 42, a signal is output from the limit integrated flow rate comparator 41 to the second flow rate control valve 44. 44 operates to close the flow path.

In this embodiment, even if an abnormality occurs in the first flow rate control valve 43, the flow path is closed when the second flow rate control valve 44 reaches the set value of the limit integrated flow rate setter 42, so the reliability regarding stopping the hot water supply is reduced. It has a further improved effect.

The limit integrated flow rate setter of the present invention may be provided with a means for arbitrarily setting the set value, or may be set to a fixed value, or may be automatically set to a set value that is increased by a certain amount from the set value of the integrated flow rate setter. It is conceivable to use a means to set the

Effects of the Invention As described above, the pumping and supplying device of the present invention includes an integrated flow rate setting device that sets an integrated flow rate, a flow rate calculator that calculates a signal from a flow rate detector, and an integrated flow calculation unit that calculates an integrated flow rate of the signal from the flow rate calculator. an integrated flow rate calculator, an integrated flow rate comparator that compares a signal of the integrated flow rate setter with a signal of the integrated flow rate calculator, and a flow control box that controls the flow rate based on the signal of the integrated flow rate comparator;
A limit cumulative flow rate setting device that sets a limit cumulative flow rate; a limit cumulative flow rate comparator that compares the signal of the cumulative flow rate calculator with the signal of the limit cumulative flow rate setting device; and an alarm based on the signal of the limit cumulative flow rate comparator. and an alarm generator that generates an alarm, and by activating the alarm generator when the value of the integrated flow rate calculator reaches the set value of the limit integrated flow rate setting device, the following effects are achieved.

(1) If the flow rate control valve is clogged with dust after hot water supply is completed and hot water supply is continued, this abnormality can be notified and overflow from the bathtub can be prevented.

(2) Even when the sealing performance for flow rate control deteriorates after long-term use, the abnormality can be detected. It is difficult to detect small leaks from the flow control valve, especially when the hot water is supplied directly from the hot water supply point or from below the bathtub.

(3) Since the hot water supply is stopped at the critical flow rate, there is no overflow from the bathtub, which makes the bathtub easy to use and has the effect of saving energy.

[Brief explanation of drawings]

Fig. 1 is a diagram of a hot water supply system using a hot water supply device showing a first embodiment of the present invention, Fig. 2 is a block diagram showing the control operation of the same device, and Fig. 3 is a diagram of a hot water supply system using a hot water supply device according to a first embodiment of the present invention. FIG. 4 is a block diagram showing the control operation of the third embodiment of the present invention, and FIG. 5 is a block diagram of a pumped water supply device in a conventional example. 8...Flow rate detector, 11...Flow rate control valve, 17...Accumulated flow rate setting device, 20...Alarm generator, 21...Flow rate Arithmetic unit, 22...
Integrated flow rate calculator, 23... Integrated flow rate comparator, 2
4... Limit integrated flow rate setter, 25... Limit integrated flow rate comparator. Figure 3 Figure 5

Claims (3)

[Claims] (1) An integrated flow rate setter that sets the integrated flow rate, a flow rate calculator that calculates the signal from the flow rate detector, an integrated flow calculator that integrates the signal of the flow rate calculator, and a signal from the integrated flow rate setter. a flow rate control valve that controls the flow rate based on the signal of the cumulative flow rate comparator, a limit cumulative flow setting device that sets a limit cumulative flow rate, and a cumulative flow rate setting device that sets a limit cumulative flow rate; It consists of a limit cumulative flow rate comparator that compares the signal of the calculating unit with the signal of the limit cumulative flow rate setting device, and an alarm generator that generates an alarm based on the signal of the limit cumulative flow rate comparator, and the value of the cumulative flow rate setting device. A hot water supply device that activates the alarm generator when the cumulative flow rate reaches a set value of the limit integrated flow rate setting device. (2) The hot water supply device according to claim 1, wherein the opening and closing of the flow rate control valve is controlled by the signal from the limit integrated flow rate comparator. (3) A second device that controls the flow rate using the signal from the limit integrated flow rate comparator.
The hot water supply device according to claim 2, comprising a flow rate control valve.