JPH05256511A - Hot water feeder - Google Patents

Abstract

PURPOSE:To obtain a hot water feeder for which a user can recognize accurately the occurrence of trouble with the aid of an alarm means by a method wherein the detection of water stream flowing through a water feed path or the checking of ignition of a burner for heating feed water is advantageously related to the supply of power to the alarm means. CONSTITUTION:A hot water feeder has a water feed path 1, a water stop valve 2 and a water stream switch 14, a heating source 3, an operating means 4 for instructing the starting or stopping of hot water feed, and a controller 7. Further, a buzzer 6 is additionally provided which issues alarm according to an instruction of starting hot water feed, or an instruction of stopping hot water feed, from the operating means 4 and stops alarm according to the ON/ OFF operation of the water stream switch 14, or the igniting/extinguishing operation of a burner 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving the usability of a water heater such as a gas instantaneous water heater.

[0002]

2. Description of the Related Art In a water heater, a heat exchange type water supply passage having a water supply pipe, a heat exchanger and a hot water supply pipe connected in series, a motor driven water shutoff valve and a water flow switch for opening and closing the water supply passage, A burner for heating the heat exchanger, operating means for instructing start and stop of hot water supply, energizing the motor based on the instruction of the operating means, and a solenoid valve according to the ON output of the water flow switch. Some include a controller that opens the valve and performs an ignition operation. Further, there has been proposed a device that sounds a buzzer in conjunction with a pressing operation of a switch when a hot water supply start or stop instruction is given by an operating means.

[0003]

However, when the motor for driving the water shutoff valve or its control circuit is out of order, when the main plug of the water supply pipe is forgotten to be opened, or when a battery is used as the power source, the battery is used. Even if the user operates the operating means to instruct the start of hot water supply and notifies the start of hot water supply (turns on the operation switch) with the buzzer when the motor voltage cannot be driven because the voltage of the However, no matter how much time is waited, the water is not supplied, and the user feels annoyed, and the usability is poor.

The object of the invention described in claim 1 is to advantageously relate the detection output of the water flow switch provided in the water supply channel and the energization to the notification means, and the user can accurately recognize the occurrence of trouble by the notification means. There is a water heater available. It is an object of the invention as set forth in claim 2 to provide a water heater in which ignition of a burner for heating water supply is electrically related to energization of an alarm means so that a user can recognize the occurrence of a trouble by the alarm means.

[0005]

A water heater according to a first aspect of the present invention comprises a water supply passage formed by connecting a water supply pipe, a heat exchanger and a hot water outlet pipe in series, and an electric water shutoff valve arranged in the water supply passage. And a water flow switch, a heating source for heating the heat exchanger, operating means for instructing start and stop of hot water supply, and opening or closing of the water stop valve based on a hot water supply start instruction or a hot water supply stop instruction by the operating means. A water heater provided with a controller for operating the heating source in response to the output of the water flow switch, which starts notification in response to a hot water supply start instruction or a hot water supply stop instruction of the operating means, and the water flow switch It is characterized in that a notification means for stopping the notification in accordance with the output of turning on or off is attached.

According to a second aspect of the present invention, there is provided a water heater having a water supply pipe, a heat exchanger, and a hot water discharge pipe connected in series, an electric water shutoff valve and a water flow switch arranged in the water supply passage, A burner for heating the heat exchanger, a combustion detection circuit for detecting an ignition state of the burner, a solenoid valve arranged in a fuel supply path to the burner, an operating means for instructing start and stop of hot water supply, A water heater comprising: a controller including the combustion detection circuit that opens or closes the water shutoff valve based on a hot water supply start instruction or a hot water supply stop instruction from the operating means, and detects ignition and extinction of the burner. A buzzer is attached to start notification in response to a hot water supply start instruction or a hot water supply stop instruction from the operating means, and stop the notification in response to an output of ignition or extinction of the burner by the combustion detection circuit.

[0007]

In the water heater according to the first aspect of the present invention, when the operating means is operated, the operation of the notifying means and the opening of the water shutoff valve are started. When it is detected by the water flow switch that water flows in the water supply channel, the operation of the notification means is stopped and the heating source is operated. In the water heater according to the second aspect, when the operation means is operated, the operation of the notification means is started and the opening of the water shutoff valve is started. When the water flow switch detects that water flows through the water supply passage, the solenoid valve provided in the fuel supply passage is opened to ignite the burner. When the combustion detection means detects ignition of the burner, the operation of the notification means is stopped.

[0008]

According to the first aspect of the present invention, since the informing means starts its operation by operating the operating means, the user can easily confirm that he has instructed the start of hot water supply when operating the operating means. , It becomes unnecessary to keep pressing the operation switch until the water supply starts. Also, for example, if the water stop valve locks for some reason and water supply does not start, the alarm means continues to operate, so the user can confirm that the water circuit of the water heater is abnormal and immediately turn on the main plug of the water supply passage. You can check or request repairs. Therefore, since it is possible to confirm the operation of the operating means and the presence / absence of abnormal operation by a single notification, the usability is excellent, and in the case of an abnormality, it is possible to immediately deal with it.

According to the second aspect of the present invention, when the burner, which is the heating source, is not ignited due to the main gas valve being closed, the solenoid valve or its control circuit being defective, etc. (that is, the discharge from the tap pipe). The operation of the notification means continues even when the water to be heated does not become hot water, so that the user can recognize the abnormality of the water circuit or the abnormality of the heating source.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas water heater 100 according to an embodiment of the water supply apparatus according to claim 1 will be described with reference to FIGS. The gas water heater 100 includes a water supply passage 1 formed by connecting a water supply pipe 11, a heat exchanger 12 and a hot water discharge pipe 13 in series, and a water shutoff valve 2 that is driven by a motor 21 to open and close the water supply passage 1. A heat source 3 including a gas burner 31 is installed below the heat exchanger 12. The hot water of the gas water heater 100 is
It is operated by the operation means 4 for instructing start or stop of hot water supply. As shown in FIG. 4, the water shutoff valve 2 is provided with a valve position switch 43 for detecting a valve open state and a valve closed state,
The valve position switch 43 is a rotor 51 that works with the motor 21.
When it fits into the notches 52 and 53 provided in the, it opens. Further, the water shutoff valve 2 is a valve that is opened by operating the pilot valve 24 when the spindle 23 is pressed, and is pressed and opened when the thick portion 511 of the rotor 51 reaches the position of the spindle 23. Further, the gas water heater 100 is provided with a hot water switch 5 and a buzzer 6.

In the water supply passage 1, the water supply pipe 11 connected to the water supply is provided with the water stop valve 2 which is driven by the motor 21 to open and close the water supply passage 1, and also serves as a water pressure responsive member downstream thereof. A water governor valve 22 is attached, and further, a water amount adjusting valve 15 whose opening degree is adjusted by a hot water outlet temperature setting knob 10 is inserted downstream thereof. Also, the tap pipe 1
The tip of 3 is a shower head 16 having a built-in shower / straight switching mechanism.

The heating source 3 has the gas burner 31 and a gas pipe 32 connected to the burner 31, and the gas pipe 32 is connected to an electromagnetic safety valve 33 and the water governor valve 22 from upstream. A water pressure responsive valve 34, a governor valve 35, and a gas supply amount adjusting valve 36 whose opening is adjusted by the knob 10 are provided. The burner 31 includes a sparker 37 for ignition and a frame rod 3 for detecting misfire.
8 and a thermocouple 39 for detecting oxygen deficiency. The water flow switch 14 is connected to the water governor valve 22 and the water pressure responsive valve 34, and when the water governor valve 22 detects running water in the water supply passage 1, the electrical contact is made conductive.

Operating means 4 as shown in FIG. 1 or FIG.
A self-returning normally open type (unlock type switch) operation switch 42 whose operation surface is covered with a waterproof film 41 is used. When the operation switch 42 is turned on, the motor 21 is energized to drive the water stop valve 2, and the valve is opened to closed or closed to open.

The gas water heater 100 is controlled by a controller 7 which operates the heating source 3 in accordance with the output of the water flow switch 14.
Made by. As shown in FIG. 3, the controller 7 includes a battery 70 as a power source, a water supply channel control unit 7A, and a heating source control unit 7
It consists of B and. The water supply channel control unit 7A includes a buzzer operation circuit 7 that operates the buzzer 6 connected to the battery 70.
1 and a valve control circuit 72 for controlling the motor 21. The buzzer operation circuit 71 receives the signals of the operation switch 42 and the water flow switch 14 as input, and receives the valve control circuit 72.
Inputs signals from the operation switch 42 and the valve position switch 43. The heating source controller 7B uses the battery 70
Is connected via a water flow switch 14 and a hot water switch 5 to the safety valve drive circuit 73 for operating the electromagnetic safety valve 33, the frame rod 38 and the output of the thermocouple 39, and controls the safety valve drive circuit 73. It comprises a combustion detection circuit 74 and an ignition control circuit 75 for operating the sparker 37.

The operation of the water heater 100 will be described with reference to the time chart shown in FIG. When the operation switch 42 is operated, the buzzer operating circuit 71 sounds the buzzer 6 and the valve control circuit 72 operates the motor 21, so that the motor 21
The water shutoff valve 2 is driven in the valve opening direction. When the water flow switch 14 detects that water is flowing in the water supply passage 1, the buzzer 6 stops the alarm, the electromagnetic safety valve 33 is opened, and the sparker 37 is operated for a predetermined time, whereby the burner 31 is ignited. ..

The motor 21 is energized until the water shutoff valve 2 is opened. When the valve opening position is reached, the motor 21 is deenergized.

Since the buzzer 6 starts to sound by operating the operation switch 42, when the user operates the operation means 4,
It can be easily confirmed that the instruction to start the hot water supply has been given, and it becomes unnecessary to continue to press the operation switch 42 until the water supply starts. Further, when the water shutoff valve 2 cannot be driven due to a decrease in electromotive force of the battery 70, a failure of the motor 21, a short circuit of the valve control circuit 72, or the valve itself is locked and water supply does not start, the buzzer sounds. 6 continues to ring (the buzzer operates at a voltage well below the motor). Therefore, the user can understand that the water supply passage 1 of the water heater 100 is abnormal or the electromotive force of the battery 70 is lowered, and immediately checks the main plug of the water supply passage 1 or replaces the battery. You can request repairs. Therefore, it is possible to confirm the operation of the operating means 4 and the presence / absence of an abnormality in the water supply system by a single notification, which is convenient, and in the case of an abnormality, it is possible to immediately deal with it.

Next, in order to stop the hot water supply, when the operation switch 42 is pressed, the buzzer 6 starts to operate and the motor 21 is energized to start the closing operation of the water shutoff valve 2. When the water flow switch 14 is turned off, the buzzer 6 is stopped, the electromagnetic safety valve 33 is closed, and the combustion of the burner 31 is stopped. Checking the operation and malfunction of the water shutoff valve 2
As described above, the buzzer 6 can be used for accurate recognition.

FIG. 6 is a controller 7 of the water heater according to claim 2.
Indicates. In this embodiment, the combustion detection circuit 74 uses the burner 3
When ignition or extinguishing of No. 1 is detected, the relay 8 is operated and the relay contact 81 is turned on. Meanwhile, the buzzer operating circuit 7
1 starts the operation of the buzzer 6 when the output of the operation switch 42 is input, and stops the operation of the buzzer 6 when the output of the relay contact 81 changes. That is, the buzzer operating circuit 7
1 starts the notification of the buzzer 6 in response to a hot water supply start instruction or a hot water supply stop instruction of the operating means 4, and stops the notification by the buzzer 6 in response to the ignition or extinguishing detection output from the combustion detection circuit 74. When the hot water switch 5 is on the water side, the buzzer operating circuit 71 operates the operation switch 42.
When the output of is input, the operation of the buzzer 6 is started, and after a predetermined time, the operation of the buzzer 6 is stopped.

FIG. 7 shows a time chart for explaining the operation of the controller 7. When the operation switch 42 is turned on, the buzzer 6 starts to ring and the water stop valve 2 starts opening. When the water flow switch 14 detects that water flows into the heat exchanger 12, the electromagnetic safety valve 33 is opened and the sparker 37 is operated for a predetermined time to ignite the burner 31.
When the combustion detection circuit 74 detects the ignition of the burner 31, the notification by the buzzer 6 is stopped.

Since the buzzer 6 starts to ring by the operation of the operating means 4, the user can easily confirm that when the operating means 4 is operated, an instruction to start hot water supply is given, and the operation switch 42 is pushed until hot water supply starts. It becomes unnecessary to continue.
Further, when the burner 31 is not ignited due to a trouble of the water shutoff valve 2, an abnormality of the ignition system, a failure of the fuel gas supply system, or the like, the buzzer 6 continues to ring.

That is, when the burner 31 which is the heating source 3 is not ignited due to the closure of the gas main valve or the malfunction of the electromagnetic safety valve 33 (when the water discharged from the hot water discharge pipe 13 does not become hot water). Since the buzzer 6 continues to ring, it is possible to notify not only the abnormality of the water supply channel 1 but also the abnormality of the fuel system, and the user can immediately check the main plug or request repair.

As in the above-described embodiment, as the operating means 4, a self-reset type normally open type (unlock type switch) operating switch 42 whose operating surface is covered with a waterproof film 41, or a non-contact type switch such as an infrared sensor. If you use a remote control such as a remote control, it is difficult to get the feeling of "operated".
It is highly effective to use a buzzer that operates in conjunction with the operation of the above operating means. Although a buzzer is shown as the notification means in the above embodiment, it may be a light emitting diode or the like.

[Brief description of drawings]

FIG. 1 is a schematic front sectional view of a water heater according to an embodiment of the present invention.

FIG. 2 is a front view of the water heater shown in FIG.

FIG. 3 is a block diagram of a controller of the water heater shown in FIG.

FIG. 4 is a schematic view of a water shutoff valve.

FIG. 5 is a time chart for explaining the operation of the water heater.

FIG. 6 is a block diagram of a controller of a water heater according to another embodiment of the present invention.

FIG. 7 is a time chart for explaining the operation of the controller.

[Explanation of symbols]

 1 Water Supply Channel 2 Water Stop Valve 3 Heating Source 4 Operating Means 5 Hot Water Switching Switch 6 Buzzer (Notification Means) 7 Controller 14 Water Flow Switch 21 Motor 31 Gas Burner 71 Buzzer Operation Circuit 72 Valve Control Circuit 74 Combustion Detection Circuit

Claims (2)

[Claims] 1. A water supply passage formed by connecting a water supply pipe, a heat exchanger and a hot water outlet pipe in series, an electric water shutoff valve and a water flow switch arranged in the water supply passage, and a heating source for heating the heat exchanger. An operation means for instructing start and stop of hot water supply, and a water shutoff valve being opened or closed based on a hot water supply start instruction or a hot water supply stop instruction by the operation means, and the heating according to the output of the water flow switch. In a water heater having a controller for operating a water source, a notification is started in response to a hot water supply start instruction or a hot water supply stop instruction from the operating means, and the notification is stopped in accordance with an ON or OFF output of the water flow switch. A water heater equipped with means. 2. A water supply passage formed by connecting a water supply pipe, a heat exchanger and a hot water outlet pipe in series, an electric water shutoff valve and a water flow switch arranged in the water supply passage, and a burner for heating the heat exchanger. A combustion detection circuit for detecting the ignition state of the burner, a solenoid valve provided in a fuel supply path to the burner, an operating means for instructing start and stop of hot water supply, and a hot water supply start instruction or hot water supply by the operating means. A hot water supply device including a controller including the combustion detection circuit that detects ignition and extinguishing of the burner while opening or closing the water shutoff valve based on a stop instruction, wherein a hot water supply start instruction of the operating means is provided. Alternatively, the water heater is provided with an informing means for starting an alarm in response to an instruction to stop hot water supply and stopping an alarm in response to an output of ignition or extinguishing of the burner by the combustion detection circuit.