JPH0436540A - Control device for hot water device - Google Patents

Abstract

PURPOSE:To enable a resetting to be carried out from a hot water supplying location and at the same time to enable a cause of stopping of combustion to be conformed while a hot water supplying plug being closed by a method wherein in the event that an abnormal state is detected to terminate the combustion, a water supplying stop signal is once outputted from a water amount switch, thereafter a water supplying sensing signal for restarting the supplying of water is outputted and thereafter a safety device is reset. CONSTITUTION:When abnormal states such as a diminishing of fire or an over-heating in a device or the like occur, an error discriminating part 3 discriminates an occurrence of abnormal state in reference to a sensing signal of each of sensor groups 5 to output an error signal. When a data signal indicating an abnormal state is outputted at an error data making part 4, an operation stop signal is outputted from a control signal output part 23 through an error processing part 22 and all loads 6 are stopped. As a hot water supplying plug is closed, it is judged by a sensing signal of a water amount sensor 51 whether or not the hot water supplying plug is released. As the hot water supplying plug is released, a control part 1 of a main body, sensor groups 5 and a remote operating part 7 or the like are reset and then an operation is returned to its normal initial state. For this state, it is possible to restart the hot water supplying operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a water heating device that safely shuts down the water heating device when an abnormality is detected in the water heating device.

[Prior art]

In general, a method of controlling a hot water supply equipment is to install a water flow switch that detects the opening and closing of the hot water tap based on the presence or absence of water flow, or a water flow sensor that detects the opening and closing of the hot water faucet based on the presence or absence of water flow, in the water heating equipment, and to control the water flow switch or the water flow. The detection signal of the sensor is input to the control circuit of the water heating equipment, and the combustion or heating operation of the water heating equipment is started or stopped based on the detection signal, and an abnormality such as a malfunction of the water heating equipment is detected. It has a function to safely stop the hot water supply equipment in case of emergency.

In the above control method, when an abnormality is detected and the water heater is safely stopped, the water heating equipment is not automatically reset, but can be reset by turning off the power switch, operation switch, or reset switch. It has become.

However, the power switch, operation switch, and reset switch are usually installed together on the control panel, etc., and when the water heater is stopped and you are in a remote location such as in front of the hot water faucet, the power switch, operation switch, and reset switch There was a problem in that it was necessary to go to the location where the switch or reset switch was installed.

In order to solve this problem, we have a safety device that stops the gas supply when an abnormality occurs, and a water flow switch that detects the water flow in the water supply pipe, and automatically ignites and extinguishes the fire according to the detection signal of the water flow switch. In automatic combustion control devices for water heaters, the safety device is reset when the water flow switch outputs a water flow stop signal, and when the safety device is activated and combustion automatically stops, It is known that by temporarily closing the hot water tap at the place of use, a water flow switch in the water supply pipe outputs a water flow stop signal and resets the safety device (see Japanese Patent Publication No. 3112/1998).

[Problem to be solved by the invention]

However, in the above-mentioned conventional automatic combustion control device, the safety device is reset by once closing the hot water tap, so the error display indicating the abnormality is erased, and the abnormality that caused the combustion to stop is removed. There was a problem that it could not be confirmed.

In order to confirm the cause of an abnormality, the hot water tap must be left open, and if water is not run unnecessarily, the cause of the abnormality cannot be confirmed, leading to the problem of wasting water resources. Ta.

If the abnormal condition that caused the combustion to stop is unknown,
Even if the operation is restarted during repair, the abnormality may not necessarily be reproduced, so there is a risk that the cause will be unknown, making it difficult to repair reliably.

Further, even if an attempt is made to restart the combustion operation to confirm an abnormality, it becomes impossible to perform the combustion operation, making it difficult to investigate the cause of the abnormality, and making repair work difficult.

The purpose of the present invention is to solve the above-mentioned problems, to make it possible to reset the safety device that stops combustion in the event of an abnormality from the hot water supply location, and to fix the cause of stopping combustion when the hot water tap is closed. An object of the present invention is to provide a control device for water heating equipment that can be checked.

[Means to solve the problem]

In order to achieve the above object, the control device for a hot water supply equipment of the present invention includes a hot water tap provided in a hot water supply path, a water flow switch provided in the water supply path to detect water flow, and a control device for stopping combustion when an abnormality occurs. In water heater equipment that has a safety device and a control unit that automatically turns on and off the fire in response to a water flow detection signal from a water flow switch, when an abnormality is detected and combustion is stopped, the water flow After a water flow stop signal is once output from the switch, the safety device is reset when a water flow detection signal indicating that water flow is resumed is output.

[Effect]

The control device for a hot water supply device of the present invention configured as described above performs hot water supply operation by automatically igniting and extinguishing the water in response to a water flow detection signal from the water flow switch during normal operation.

When a safety device stops combustion when an abnormality occurs, if the hot water tap is once closed and then opened again, the safety device is reset and the hot water supply operation can be restarted.

This allows the user to reset the water supply at the hot water supply location, and also allows the user to confirm an abnormality through an error display when the hot water tap is closed and water flow is stopped, thereby preventing wastage of water resources. .

〔Example〕

Embodiments of the present invention will be described based on the drawings.

In FIG. 1, a main body control section I consisting of a CPU, etc. has a load control section 2, an error discrimination section 3, and an error data creation section 4, and the load control section 2 has a normal processing section 21 and an error processing section. 22 and a control signal output section 23.

Water amount sensor 51, flame detection sensor 5 such as flame rond
2. In a normal combustion state, the detection signal output from the sensor group 5 consisting of an overheat detection sensor 53 such as a high limit switch, a fan rotation speed detection sensor 54, a hot water temperature sensor 55, etc. Processed by the processing section 21, an operation control signal is outputted from the control signal output section 23, and the load 6 consisting of the gas tM1 valve 61, fan motor 62, igniter 63, etc. is controlled.

As a safety device, the detection signal output from the sensor group 5 is manually input to the error discrimination section 3, and in the event of an abnormal order such as flame loss or equipment overheating, the error discrimination section 3 detects the detection signal output from the sensor group 5. Determining the occurrence of an abnormality from the signal and outputting an error signal, creating error data indicating the abnormal state in the error data creation section 4 and outputting the data signal,
The signal is input to and processed by the error processing section 22, and the error processing section 22 outputs a processed signal, and an operation stop signal is output from the control signal output section, and all the loads 6 are stopped.

Further, a remote control unit 7 is provided, and a control unit 71 and an error display unit 72 for displaying abnormal conditions are built-in.
The output of the operation unit 71 is inputted as an operation signal to the normal processing unit 21 of the load control unit 2 and the error determination unit 3, and is sent to the sensor group 5.
It is processed in the same way as the detection signal output from.

The error display section 72 displays error data output from the error data creation section 4 and indicating an abnormal state.

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

When the combustion operation is started, the sensor group 5 is in a state where it can normally detect the operating status of the hot water supply equipment, the error determination unit 3 is in a standby state, and the error display unit 72 is in a standby state where no abnormal state is displayed. Confirm that the main body control unit 1, sensor group 5, remote control unit 7, etc. are in a normal initial operating state.

The error determination unit 3 determines whether there is a failure, flame loss, overheating, or other abnormal condition based on the detection signal from the sensor group 5, and if there is no abnormality, normal combustion operation is performed.

When the error determination unit 3 confirms that an abnormality has occurred, the control signal output unit 23 outputs an operation stop signal for the hot water supply equipment via the error data creation unit 4 and the error processing unit 22 to stop the water heating equipment, while also outputting the error data. An error is displayed on the error display section 72 based on the output from the creation section 4.

When a reset operation is performed by turning off the operation switch, power switch, or reset switch, the main body control section 1, sensor group 5, remote control section 7, etc. are reset and returned to normal operating conditions.

When the above-mentioned switches are not reset, whether or not the hot water tap is closed is determined based on the detection signal of the water amount sensor 51, and when the hot water tap is not closed, the water heating equipment is kept stopped.

When the hot water tap is closed, whether or not the hot water tap is subsequently opened is determined based on the detection signal of the water flow sensor 51, and when the hot water tap is not opened, the water heating equipment is kept stopped.

When the hot water tap is opened, the main body control section 1, the sensor group 5, the remote control section 7, etc. are reset to return to the normal initial operating state.

From this state, hot water supply operation can be restarted.

With this configuration, it is possible to perform a reset operation using the operation switch, power switch, or cent switch.
The user can reset the system at the hot water supply location, and also can confirm an abnormality through an error display with the hot water faucet closed, allowing the user to stop water flow and determine the cause of the abnormality.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

When the operation of the hot water supply equipment is stopped when an abnormality occurs.

Since the safety device is reset when the hot water tap is closed and then opened again, the user can reset the safety device at the hot water supply location, and the system also prevents errors even when the hot water tap is closed and the water supply is stopped. Abnormalities can be confirmed through the display, and wasteful use of water resources can be prevented.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a control block diagram of a hot water supply device, and Fig. 2 is a flowchart of the control operation. DESCRIPTION OF SYMBOLS 1... Main body control part, 2... Load control part, 3... Error determination part, 5... Sensor group, 6... Load, 7...
・Remote control unit.

Claims (1)

[Claims] (1) It has a hot water tap installed in the hot water outlet path, a water flow switch installed in the water supply channel to detect water flow, and a safety device that stops combustion in the event of an abnormality, and a water flow detection signal from the water flow switch. In water heater equipment that has a control unit that automatically turns ignition and extinguishment in response to A control device for a hot water supply device, characterized in that the safety device is reset when a water flow detection signal is output.