JPS6346342A - Automatic hot water supplier - Google Patents

Abstract

PURPOSE:To make it possible to automatically shift to other control sequence when a fault in a circulating water channel system by providing timer means in which a measuring time is cleared by a signal from comparison means, and discrimination means for outputting a signal for stopping a hot water supplying sequence by a time-up signal from the timer means. CONSTITUTION:When a water channel changeover valve 20, a circulating pump 24 and the like of a circulating water channel system are in fault, water stored in a hopper 30 cannot be introduced into a bathtub 14. Therefore, the water level in the hopper is raised and a water quantity adjustor 34 acts to stop the water supply to the hopper 30. In accordance therewith, a timer setting signal is outputted from a comparison means 46, and a predetermined measuring time is set at a timer means 48. As long as a time clearing signal is not afforded from a comparison means 46 within the measured time, the timer means 48 outputs a time-up signal and outputs a signal after the lapse of the set time. A discrimination means 52 responds to the time-up signal and outputs a signal for stopping the hot water supply sequence and to shift the hot water supplier to other control sequence.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention comprises a hot water supply waterway system that heats incoming water, and a circulation waterway system that circulates and heats the water supplied from the hot water supply waterway system to the bathtub. In particular, when an abnormality occurs in the circulation waterway system, the hot water supply sequence for supplying hot water from the hot water supply waterway system to the bathtub via the circulation waterway system can be automatically stopped. Regarding automatic hot water supply equipment.

(b) Prior art and its problems Conventional automatic water heaters include a hot water supply channel system that heats incoming water, and a system that guides the supplied water from this hot water supply channel system to the bathtub.
The circulation waterway system is equipped with a circulation waterway system that circulates and heats the water supplied to the bathtub, and the hot water supply waterway system is equipped with a hot water supply heat exchanger and a water flow sensor that detects the amount of water entering the bathtub, while the circulation waterway system is equipped with a waterway switching valve,
A circulation pump and a bath pot heat exchanger are each installed, and a hopper that stores water supplied from the hot water supply waterway system at the connection between the hot water supply waterway system and the circulation waterway system, and a ball tap type water volume that adjusts the amount of water stored in this hopper. In addition, a sequence controller was installed to execute various sequences including a sequence for guiding the water supplied from the hot water supply waterway system to the bathtub via the circulation waterway system (hereinafter referred to as the "supply 71s sequence"). There is something.

In this conventional device, when executing the hot water supply sequence described above to supply hot water to the bathtub, the hot water supply heat exchanger is controlled to adjust the hot water supply temperature, while the supplied water heated by the hot water supply heat exchanger is temporarily stored in the hopper. When the amount of water stored in the hopper reaches a certain value, the waterway switching valve is switched from the circulation side to the hot water supply side, and the circulation pump is operated to route the supplied water from the hot water supply waterway system to the hopper and then through the circulation waterway system. and send it out to the bathtub.

By the way, in such a conventional device, if the waterway switching valve, circulation pump, etc. that make up the circulation waterway system are out of order, the water level in the hopper will rise because the water stored in the hopper cannot be guided to the bathtub. Then, in order to prevent overflow, the water fflff moderator operates and the water supply to the hopper is stopped. In this case, is the athlete's foot sensor exclusively supplied? For feedforward control of n9L degrees.

Moreover, since the water flow regulator's water supply stop operation described above is performed purely mechanically, separated from the signal control system, the sequence controller could not recognize the water supply stop. . As a result, the sequence controller continues to output drive signals to the circulation pump despite the failure, resulting in the hot water supply sequence being maintained, and it is not possible to shift to the pond sequence unless the power is reset. There was a problem.

The present invention has been made in view of the above circumstances, and is designed to stop the hot water supply sequence and automatically shift to another control sequence when an abnormality occurs in the circulation waterway system. The purpose is to

(C) Means for Solving the Problems In order to achieve the above-mentioned objects, the present invention provides a hot water supply channel system for heating incoming water, a system for guiding water supplied from the hot water supply channel system to a bathtub, and supplying hot water to the bathtub. It is equipped with a circulation waterway system that circulates and heats water, and a sequence controller that executes a hot water supply sequence that supplies water supplied from the hot water supply waterway system to the bathtub via the circulation waterway system. In an automatic water heater equipped with an athlete's foot sensor that detects and outputs a water amount detection signal corresponding to the amount of water entering, the sequence controller compares the athlete's foot detection signal output from the water sensor with a reference value and outputs a water amount detection signal. a comparison means that outputs a timer set signal when is less than the reference value and a timer clear signal when it is greater than the reference value; In addition, the timer means whose measured time is cleared by the timer clear signal from the comparison means and the presence or absence of a time-up signal from this timer means are determined, and if a time-up signal is detected, the hot water supply sequence is stopped. a determining means for outputting a signal;
It has a configuration with the addition of .

(D) Function In the automatic hot water supply device of the present invention, when executing the hot water supply sequence, if the water channel switching valve, circulation pump, etc. that make up the circulation waterway system are out of order, the flow in the hot water supply waterway system will stop. This is detected by the water flow sensor. The comparison means compares the water amount detection signal output from the water amount sensor with a reference value, and when the water amount detection signal is less than the base Q value, a timer set signal is set.
If the value is greater than or equal to the base value, a timer clear signal is output. If the circulation waterway system is out of order, the water amount detection signal will be below the reference value, so the comparison means will output a timer set signal. As a result, the timer means has a predetermined total of 41
Unless one hour is set and it is time to measure, the timer means outputs a time-up signal after the set time elapses. When the determination means receives a time-up signal from the timer means, it outputs a signal for stopping the hot water supply sequence in response to the time-up signal. This allows the sequence controller to recognize that an abnormality has occurred in the circulation waterway system, and to stop this hot water supply sequence and move on to another sequence.

(e) Examples Hereinafter, the present invention will be explained in detail based on examples shown in the drawings.

FIG. 1 is an overall configuration diagram of an automatic water heater according to an embodiment of the present invention. In the figure, reference numeral 1 indicates the entire automatic hot water supply system, and 2 indicates a hot water supply channel system that heats incoming water. This hot water supply waterway system 2 has a hot water supply pipe 4 installed therein, and
It is configured by providing a hot water supply heat exchanger 6, a burner 8 of the hot water supply heat exchanger 6, and a water amount sensor IO that detects the amount of water entering. In this example, a so-called turbine-type water meter is applied to the above-mentioned water amount sensor 1O, which outputs a water amount detection signal with six pulse periods corresponding to the amount of incoming water by rotating an impeller with the water flow.

Reference numeral 12 denotes a circulation waterway system that guides the water supplied from the hot water supply waterway system 2 to the bathtub [4, and circulates and heats the water supplied to the bathtub 14. This circulation waterway system 12 has a circulation pipe 16 and a circulation return pipe 18 connected to the bath PR 14, a waterway switching valve 20, a driving means 22 for this waterway switching valve 20, a circulation pump 24, and a bath pot heat exchanger. 26 and the burner 28 of this bath kettle heat exchanger 26, respectively. In this example, a three-way valve is applied to the waterway switching valve 20 described above.

On the other hand, at the connection between the hot water supply waterway system 2 and the circulation waterway system 12, there is a hopper 30 open to the atmosphere that temporarily stores the water supplied from the hot water supply waterway system 2, a solenoid valve 32, and a pole that adjusts the amount of water stored in the hopper 30. A tap type water flow regulator 34 is arranged.

Further, 36 is a bathtub water level sensor that detects the water level of the bath WI14, 38 is a temperature sensor that detects the temperature of hot water circulated in the circulation channel system I2, 40 is a hopper water level sensor that detects the water level stored in the hopper 30, and 42 is an automatic This is a setting switch for setting hot water supply conditions.

44 is a sequence controller that executes various control sequences including a hot water supply sequence.

As shown in FIG. 2, the sequence controller 44 of this embodiment uses a pulse cycle of a reference signal that gives a reference value (corresponding to the minimum operating water amount in this example) to the pulse cycle of the water amount detection signal output from the water amount sensor IO. Comparing means 46 which compares the pulse period of the water amount detection signal with the reference pulse and outputs a timer set signal when it is longer than that of the reference pulse, and outputs a timer clear signal when it is shorter;
A timer means 48 whose measurement time is set by the timer set signal from the timer set signal from the comparator means 46, outputs a time-up signal after the set time elapses, and clears the measurement time by the timer clear signal from the comparison means 46.
and determining means for determining the presence or absence of the time-up signal from the timer means 48 and the water level detection signal from the bathtub water level sensor 36, and outputting a signal to stop the hot water supply sequence if the time-up signal or the water level detection signal is output. 52. Note that the above comparison means 46 is F/
By the combination of the V converter and the comparator, and by the timer means 48 by a presettable counter,
Further, the determining means 52 can each be configured by a digital switch, but a microcomputer can also be applied.

Next, the control operation when executing the hot water supply sequence in the automatic hot water supply apparatus 1 of the present invention will be described with reference to the flowchart in FIG. 3.

(1) When the circulation waterway system 12 is in a normal operating state In this case, first, operate the setting switch 42 to set the hot water supply sequence, and in response, the sequence controller 44 controls the burner of the hot water heat exchanger 6. At the same time, the solenoid valve 32 is opened (step ■). As a result, hot water heated by the hot water heat exchanger 6 is dropped into the hopper 30 from the hot water supply vibrator 4 via the solenoid valve 32 and the water fl1 moderator 34. When the stored water in the hopper 30 reaches a predetermined water level, a hopper water level detection signal is output from the hopper water level sensor 40 to the sequence controller 44 (step (2)).

In response to this detection signal □, the sequence controller 44 applies drive signals to the drive means 22 and the circulation pump 24, respectively, to switch the waterway switching valve 20 from the circulation side to the hot water supply side, and connect the hopper 30 and the circulation pipe 16. At the same time, the circulation pump 24 is started (step 2). As a result, the hot water stored in the hopper 30 is transferred to the channel switching valve 2.
0, hot water is supplied to the bathtub I4 via the circulation pump 24 in sequence.

On the other hand, the water amount detection signal from the water amount sensor 10 is input to the comparing means 46 of the sequence controller 44. The comparison means 46 compares the pulse period of the water level detection signal from the water amount sensor 10 with the pulse period of a reference signal that provides a reference value (step (2)). In the normal operating state, the pulse period of the water amount detection signal is shorter than the pulse period of the reference signal, so the comparison means 46 outputs a timer clear signal. Therefore, the timer means 48 does not output a time-up signal. Therefore, the sequence controller 44
While the detection signal is not output from the bathtub water level sensor 36, the process returns to step (2) and continues the hot water supply sequence. Bathtub 14
When hot water is stored in the tub and reaches a predetermined amount, a water level detection signal is output from the bathtub water level sensor 36, and this detection signal is input to the determining means 52 of the sequence controller 44.

The determining means 52 outputs a sequence stop signal in response to this water level detection signal (step 2). As a result, the hot water supply sequence is stopped (step ■).

Note that when proceeding to the reheating sequence following the hot water supply sequence described above, a drive signal is given from the sequence controller 44 to the drive means 22 to switch the waterway switching valve 2.
0 is switched to the circulation side, the circulation going pipe 16 and the circulation return pipe 18 are communicated, and the solenoid valve 32 is closed. If the water temperature in the bathtub 14 detected by the temperature sensor 38 is below the set value, the circulation pump 24 continues to be driven, and the burner 28 of the bathtub heat exchanger 26 is ignited to heat the circulating water. .

(ii) If the circulation waterway system is out of order If the waterway switching valve 20, circulation pump 24, etc. that make up the circulation waterway system are out of order, the water stored in the hopper 30 cannot be guided to the bathtub I4, so the hopper The water level rises, and in order to prevent overflow, the water flow regulator 34 operates and water supply to the hopper 30 is stopped. In response to this, the solenoid valve 32 remains open and the flow of the hot water supply channel system 2 is stopped. Then, in step Since the pulse period is longer than the pulse period of the reference signal, the comparison means 46 outputs a timer set signal.

As a result, a predetermined measurement time is set in the timer means 48 (step 2). The timer means 48 outputs a time-up signal after the set time has elapsed, unless a timer clear signal is given from the comparison means 46 within the set measurement time. This time-up signal is given to the discriminating means 52 at the next stage, so that the discriminating means 52 outputs a signal to stop the line-up sequence in response to this time-up signal. This allows it to be recognized that an abnormality has occurred in the circulation waterway system, so the hot water supply sequence is stopped and a transition is made to another control sequence.

(f) Effects As described above, according to the present invention, when an abnormality occurs in the circulation waterway system, the sequence of supplying hot water from the hot water supply waterway system to the bathtub via the circulation waterway system is stopped, and other controls are activated. Automatically transition to sequence. Therefore, effects such as being able to smoothly execute each control sequence for automatic hot water supply are exhibited.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall configuration diagram of an automatic water heater, Fig. 2 is a block diagram showing details of the sequence controller, and Fig. 3 is a flowchart for explaining the operation of the sequence controller. be. l...Automatic hot water supply device, 2...Hot water supply waterway system, lO...
-Water m sensor, 12... Circulation waterway system, 14... Bathtub, 44... Sequence controller, 46... Comparison means, 48... Timer means, 52... Discrimination means.

Claims (1)

[Claims] (1) A hot water supply channel system that heats incoming water, a circulation channel system that guides the water supplied from this hot water channel system to the bathtub, and circulates and heats the water supplied to the bathtub, and a circulation channel system that heats the water supplied from the hot water supply channel system. The hot water supply system includes a sequence controller that executes a water supply sequence that leads hot water to the bathtub via a circulation waterway system, and the hot water supply waterway system is provided with a water flow sensor that detects the amount of water entering the water supply waterway system and outputs a water amount detection signal corresponding to the amount of water that enters the water supply waterway system. In the automatic water heater, the sequence controller compares the water amount detection signal output from the water amount sensor with a reference value, and sets a timer signal when the water amount detection signal is less than the reference value, and when it is greater than the reference value. is a comparison means that outputs a timer clear signal, and a measurement time is set by the timer set signal from the comparison means, and after the set time elapses, a time-up signal is output, and the timer clear signal from the comparison means is set. a timer means for clearing the measured time by a signal; a determining means for determining the presence or absence of a time-up signal from the timer means and outputting a signal to stop the hot water supply sequence when the time-up signal is detected; An automatic water heater characterized by the addition of.