KR930005207B1 - Controller with plural indicating elements at operating part - Google Patents

Abstract

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Description

Control method of the remote control operation unit having a plurality of display elements on the operation unit

1 is a block diagram showing the functional configuration of the gas water heater control device according to the present embodiment.

2 is a schematic configuration diagram showing a gas water heater according to the present embodiment.

3 is a circuit diagram showing a main remote control of the present embodiment.

4 is a circuit diagram showing a sub-remote control according to the present embodiment.

5 is a voltage explanatory diagram showing a discrimination voltage relating to the main remote control in the control device of the present embodiment.

6 is a voltage explanatory diagram showing a discriminating voltage for the sub-remote controller in the control device of the present embodiment.

7 to 11 are voltage waveform diagrams for turning on lamps of the remote controllers.

12 is a flowchart showing the operation of the gas water heater of this embodiment.

* Explanation of symbols for main parts of the drawings

1: gas water heater 30: controller

40A, 40B: Electric wire 50: Main remote control

51 variable resistance circuit 56 combustion lamp circuit (first display circuit)

D8, D9: diode (rectifier circuit) C2: capacitor (first capacitor)

Q3: transistor (first switching element) C3: capacitor (second capacitor)

L1: combustion lamp (first display element) 57: driving lamp circuit (second display circuit)

R8: Resistor D10: Diode (Charge / Discharge Circuit)

L2: driving lamp (second display element) Q4: transistor (second switching element)

The present invention relates to a control device for controlling a gas water heater and a control method of a gas water heater remote control unit provided with a plurality of display elements such as a display lamp and the like connected to two wires.

Background Art Conventionally, for example, a combustion hot water heater is provided with a remote controller (hereinafter referred to as a remote control unit) for setting a tapping temperature in a place such as a bathroom away from a hot water heater. Some have only two wires to connect.

In this case, since the circuit of the remote control unit is simplified, in order to set the temperature, only a variable resistance circuit whose resistance value is changed in accordance with the operation state is provided, and a constant voltage is applied from the control body, and the operation state of the variable resistance circuit is applied. The voltage lowered by the resistance according to the present invention is detected by a voltage detecting resistor provided on the main body of the controller, and the set temperature is read by the detected voltage.

In addition, a combustion lamp for indicating that the combustor is in combustion is provided in the remote control unit, and the combustion lamp is connected in parallel with a variable resistance circuit. The flow of water is detected by a water flow switch or the like, and combustion starts. The lamp is turned on at the same time when a constant voltage for reading is supplied and the set temperature is read.

In the combustion type hot water heater equipped with such a display element, in particular, in order to increase the display function in the remote control operation section, for example, whether the control device is operating as an operation standby state before combustion starts, or if there is an abnormality such as a misfire. It is required to display the display in more detail according to the operation state such as whether it has occurred or not. However, in the conventional case, since the display device does not light up at the same time as the reading of the set temperature, the display device turns on or flashes independently of each other. There is a problem that it is not possible to increase the number of.

The present invention increases the number of display elements provided in the control unit and the remote control unit connected by two wires, and simultaneously lights up each display element independently by a simple driving circuit that does not require a complicated circuit configuration such as a microcomputer. Or it aims at being possible to drive so that it may flash.

The present invention provides a remote control operation unit having a variable resistance circuit for setting the operation state of the gas water heater, the control unit connected to the control unit for controlling the gas water heater and two wires, wherein the remote control operation unit is supplied with a constant voltage direction A rectifier circuit for rectifying an AC component in a voltage, a first capacitor charged by the output of the rectifier circuit, and a first switching element for driving the first display element when the charging voltage of the first capacitor is equal to or higher than a predetermined voltage. A first display circuit; A charge / discharge circuit for charging a second capacitor through a resistor by the supply voltage and discharging the charge of the second capacitor through a diode; and a second display element when the charge voltage of the second capacitor is equal to or higher than a predetermined voltage. And a second display circuit comprising a second switching element for driving the controller to apply a constant voltage for detecting a structure state of the variable resistance circuit to the remote controller operation unit to control the gas water heater according to the operation state of the variable resistance circuit. At the same time, according to an operation state of the gas water heater, a voltage for independently operating the first display circuit and the second display circuit is supplied, and at least the first display element and the second display element blink each independently. By means.

In the present invention, the gas water heater is controlled in accordance with the operation state of the variable resistance circuit.

The first display circuit and the second display circuit are connected in parallel with the variable resistance circuit. These display circuits light up each display element by different voltage components, and when the supply voltage having a constant voltage direction supplied by the two wires from the control device has an effective value of more than a predetermined voltage, the first display element lights up. .

In addition, when the effective value of the supply voltage is periodically changed, the first display element blinks.

According to the present invention, since each display element is independently lighted by a predetermined voltage component of the supply voltage in the control device, each display element can be individually lit or flashed.

Therefore, various displays can be made according to the operation state of the gas water heater.

In addition, the gas water heater can be controlled in accordance with the operation state of the variable resistance circuit by supplying only a constant voltage for detecting the operation state of the variable resistance circuit by stopping them for a small time while supplying the predetermined voltage component.

Therefore, many displays can be made by a simple circuit configuration without providing a complicated driving circuit using a microcomputer or the like in the remote control unit.

EXAMPLE

Next, this invention is demonstrated based on the Example shown by drawing.

The burner group 11 formed by arranging several burners is installed in the combustor case 10 of the gas water heater 1 shown in FIG. 2, and the blower 12 for supplying combustion air to the burner group 11 is installed below the combustor case 10, have.

A water pipe heat exchanger 13 is provided above burner group 11 in combustor case 10, and water passing through the inside is heated by the heat of combustion by burner group 11.

In the vicinity of the burner group 11 in the combustor case 10, a sparker 14 for igniting the burner group 11 is provided, and a frame rod 15 for detecting the ignition of the burner group 11 for the operation check of the gas water heater 1 is provided.

Above the combustor case 10, an exhaust port 2 for discharging combustion exhaust gas to the outside is provided.

Below the burner group 11, a nozzle tube 16 for supplying fuel gas is provided, and the nozzle tube 16 is provided with a plurality of fuel ejection openings 16 for ejecting fuel gas corresponding to each burner of the burner group 11, respectively.

The fuel pipe 20 for inducing fuel gas to the nozzle pipe 16 includes two solenoid valves 21 and 22 for passing the fuel gas at the time of energization, and a positive pressure for controlling the supply amount of fuel gas by controlling the supply pressure in response to the energizing current. Proportional valves 23 are provided in turn from the upstream side.

In the water supply pipe 17 which guides the water to the heat exchanger 13 from an unshown water supply source, an electric water flow control device 18 for adjusting the amount of hot water supply and a water flow switching 19 for detecting the water passing through the heat exchanger 13 are provided from the upstream side. A hot water temperature thermistor 25 which detects the tapping temperature of the hot water flowing out of the heat exchanger 13 in a hot water pipe 17 which is provided as a book and guides the hot water flowing out of the heat exchanger 13 into a hot water inlet not shown. Is provided.

The gas water heater 1 having the above configuration is controlled by the controller 30 shown in FIG.

The control device 30 is based on a microcomputer having the functional units of the sequence control unit 31, the temperature control unit 32, the combustion control unit 33, the water quantity control unit 34, and the display control unit 35 by a predetermined control program stored in the ROM. The operation control is performed in accordance with the operation states of the main remote controller (hereinafter referred to as the [main remote controller]) 50 and the sub remote controller (hereinafter referred to as the [sub remote controller]) 60 respectively driven by the remote control drive circuits 40 and 40a.

The control device 30 is provided with terminals 36, 37 for connecting the main remote control 50 and terminals 38, 39 for connecting the sub remote control 60.

Since the main remote control 50 is connected between terminals 36 and 37 of the control device 30, terminals 50A and 50B are provided, and two wires 40A and 40B are connected between the control device 30 and each terminal of the main remote control 50.

In this case, since the polarity is not particularly determined, the terminals 50A and 50B of the main remote control 50 may be reversely connected to the terminals, 36 and 37 of the control device 30.

First, the configuration of the main remote control 50 will be described.

As shown in Fig. 3, the main remote controller 50 is provided with the variable resistance circuit 51, the operation switch circuit 52, and the display circuit 53 in parallel between the terminals 50A and 50B.

In the variable resistor circuit 51, the variable resistor VR1 and the resistor R1 connected in parallel are connected in series with the resistor R2. The set temperature is determined in accordance with the resistance value of the variable resistor circuit 51 which is changed by the user operating the variable resistor VR1.

The operation switch circuit 52 is composed of an operation switch SW1 for instructing operation start and stop of the gas water heater 1 and a resistor R3 connected in series with the operation switch SW1. The operation switch SW1 has an open upper push button switch which is always open. The circuit is closed only during operation.

The display circuit 53 is provided with a bridge circuit 54 made of six diodes D1-D6 in which a full-wave rectification circuit is formed so that terminals 50A and 50B may be connected to terminals 36 and 37 of the control device 30 in reverse. Combustion lamp circuit 56 and operation lamp circuit 57 provided in parallel through the switching circuit 55 are comprised.

The bridge circuit 54 ensures that the voltage applied between the terminals 50A and 50B is in a constant direction with respect to the switching circuit 55, the combustion lamp circuit 56, and the operation lamp circuit 57, and at the same time the diode D3 and diode D4, and the diode D5 and diode D6, respectively. By connecting in series, the operating voltage of the display circuit 53 is set high and the current flowing through the display circuit 53 is reduced when the driving voltage to the display circuit 53 is not supplied.

The switch circuit 55 is a circuit for supplying the lamp lighting power to the combustion lamp circuit 56 and the driving lamp circuit 57 when the voltage supplied from the bridge circuit 54 is equal to or higher than a predetermined voltage, and is connected to the base of the transistor Q1 through the resistor R4. When the applied voltage to the Zener diode ZD1 exceeds the breakdown voltage of the Zener diode ZD1, the transistors Q1 and Q2 are turned on together and power is supplied to the respective lamp circuits 56 and 57.

The combustion lamp circuit 56 is supplied with electric power for lamp lighting from the switching circuit 55, wherein an AC component is included in the DC voltage applied to the resistor R5 through the diode D7, and the LED is applied when the AC component is above a predetermined voltage. The combustion lamp L1 of LED) lights up.

Here, the AC component of the DC voltage applied to the resistor R5 passes through the capacitor C1, is double-voltage current by the diodes D8 and D9, and then charged to the capacitor C2 through the resistor R6.

When the charging voltage of the capacitor C2 is equal to or higher than a predetermined pressure, the charge of the capacitor C2 flows through the resistor R7 to the transistor Q3 as a base current, and at this time, the transistor Q3 is turned on, and the combustion lamp L1 connected to the collector of the transistor Q3 lights up.

The driving lamp circuit 57 supplies the lamp lighting power from the switching circuit 55, and turns on the driving lamp L2 made of the light emitting diode when the effective value of the DC voltage at this time is equal to or higher than the predetermined voltage.

Here, the base current is supplied to the transistor Q4 through the resistor R9 when the potential of the capacitor C3 charged by the supply voltage in the switching circuit 55 through the resistor R8 and discharged by the diode D10 when the supply voltage is lower than the charge voltage is greater than or equal to the predetermined voltage. Flows, transistor Q4 is turned on, and operation lamp L2 connected to the collector of transistor Q4 lights up.

Subsequently, the sub remote control 60 will be described.

As shown in FIG. 4, the variable resistance circuit 61 and the display circuit 63 are provided in parallel in the sub-remote control 60 between terminals 60A and 60B.

In the variable resistor circuit 61, the variable resistor VR2 and the resistor R11 connected in parallel as in the variable resistor circuit 51 are connected in series with the resistor 12, and the rotary priority switch SW2 is connected in series.

The priority switch SW2 is a switch for performing the temperature control in the control device 30 based on the set temperature of the sub-remote control 60. In the control device 30, the sub-remote control 60 is selected when the priority switch SW2 is in the on-state. When the main remote control 50 is selected.

The display circuit 63 includes a bridge circuit 64 having the same configuration as that of the display circuit 53 of the main remote controller 50, and a combustion lamp circuit 66 having a combustion lamp L3 provided in parallel through the switch circuit 65 on the output side of the bridge circuit 64; It consists of an operation lamp circuit 67 with an operation lamp L4, and a priority display circuit 68 is provided in parallel with the bridge circuit 65.

The priority display circuit 68 lights the priority lamp L5 which becomes the display switch SW3, the resistor R13, and the light emitting diode.

The main remote control 50 and the sub remote control 60 are provided in the control device 30 according to the user's needs. As a basic use state, when the main remote control 50 and the sub remote control 60 are provided together, the main remote control 50 includes only the remote controller. Three cases are not provided.

In addition, the sub-remote control 60 can be connected to the terminals 36 and 37 as it is instead of the main remote control 50 by replacing a dip switch not shown in the drawing. In this case, the sub-remote control 60 can be used alone or two sub-remote control 60 can be used. It can be connected directly to terminals 36 and 37, and it can be used by only the sub-remote control 60 or two sub-remote control 60, and in this case, the priority switch SW2 of the sub-remote control 60 connected to the terminals 36 and 37 is used as an operation switch. In the following description, the main remote control 50 is connected to the terminals 36 and 37.

Next, each functional part in the control apparatus 30 and the control apparatus 30 is demonstrated, respectively.

In the control apparatus 30, when the control apparatus 30 is connected to a light line, the 5V power supply which is not shown in figure is always operating, and the microcomputer is operating in a standby state.

In the sequence control section 31, when the control device 30 is connected to the electric wire, the terminal voltage V50, V60 between the terminals 36, 37 and 38, 39 respectively detected in the starting standby state and detected through the resistors 41, 41a, respectively. As shown in Figs. 5 and 6, respectively, 0.5 to 2.5 V is read as a set temperature voltage, 3.5 to 5 V is read as a disconnection detection voltage, and 0.05 V or less is used for terminals 36 and 37. Is read as a short-circuit detection voltage between terminals 38 and 39.

The terminal voltage V50 on the 50 side of the main remote controller is read as the operation switch operating voltage, which is lower than the minimum voltage of 0.5V read as the set temperature voltage and higher than 0.05V as the short circuit detection voltage.

On the other hand, with respect to the terminal voltage V60 on the sub remote control 60 side, 0.5 to 2.5 V as the set temperature voltage is detected only when the priority switch SW2 is closed. do.

On the contrary, when the priority switch SW2 is in the open state, the terminal voltage V60 becomes higher than the set temperature voltage of 0.5 to 2.5 V. Therefore, 3.5 to 5 V is detected when the main remote controller 50 is used.

In this way, when a voltage of 3.5 to 5 V is detected with respect to the terminal voltage V60, it is not determined whether it is due to disconnection or the priority switch SW2, but in any case, the setting state of the variable resistance circuit 61 of the sub-remote control 60 is determined. Since the control is irrelevant, there is almost no problem in practical use.

The operation mode is determined by determining each connection state or conduction state on the basis of either the disconnection detection voltage or the set temperature voltage of each terminal voltage V50, V60 set as described above.

As the operation mode, there are a multi-mode in which the main remote control 50 and the sub-remote control 60 are connected together in accordance with the use mode, an automatic mode in which neither the remote control is connected nor a single mode in which only the main remote control 50 is connected.

The sequence control unit 31 enters the operation standby state when the operation signal of the operation switch SW1 is detected except in the automatic mode, and always in the operation standby state in the automatic mode.

In the case of the multi-mode, when the operation signal of the operation switch SW1 is detected and the operation standby state, which remote control is controlled based on the set temperature information of which remote controller based on the terminal voltage V60 on the 60 side of the sub-remote control with the switch SW2. And transmit the set temperature from the selected remote controller to the temperature controller 32.

Further, in the driving standby state, the display controller 35 transmits the selected control information of the remote controller and the selected remote controller.

In the operation standby state, when the power supply of the blower 12 of the gas water heater 1 or the drive circuit for driving each valve is generated and the water flow to the heat exchanger 13 is detected by the water flow switch 19, a predetermined ignition sequence control is performed to start combustion. When the water flow stop is detected, combustion is stopped by the digestion sequence control.

The temperature controller 32 reads the set temperature voltage from the selected remote controller before the start of water flow and determines the amount of heating from the detected temperature information by the tapping thermistor 25 when the temperature is set to the operation standby state and the operation state. To transmit.

The combustion control unit 33 controls the combustion amount of the burner group 11 by controlling the blower 12 and the constant pressure proportionality valve 23 according to the heating amount determined by the temperature control unit 32.

In the automatic mode, the unit is always in operation standby state, and when water flow is detected, it is operated at a set temperature (for example, 60 ° C or 75 ° C) at a set temperature, and in stand-alone mode, it is in the start standby state. As in the case of the priority of the main remote control, it operates only in response to the operation status of the main remote control 50.

The display control unit 35 is controlled by the information of the selected remote controller and the combustion information detected by the frame rod 15. The display controller 35 controls three lamps of each of the remote controllers 50 and 60 to light, turn off, and flash in response to the respective driving conditions. Control signals to be sent to the remote controller driving circuits 40 and 40a, respectively.

Prior to the description of the control contents of the display control unit 35, the configuration of the remote control drive circuits 40, 40a controlled by the display control unit 35 will be described.

In the remote controller driving circuits 40 and 40a, the supply voltage from the 5V power supply is applied to the terminals 36 and 38 through the resistors 42 and 42a, respectively, and the detection voltage Vrem is applied to each of the remote controllers 50 and 60 connected to the terminals 36 and 38, respectively. It is always supplied.

In the remote control drive circuits 40 and 40a, a direct current voltage from a 5V power source is directly applied to each of the terminals 36 and 38 in addition to the detection voltage Vrem, so that the switching transistors 43 and 43a are directly connected to the diodes 44, It is connected to each terminal 36 and 38 via 44a.

In front of the transistors 45 and 45a, switching transistors 46 and 46a are provided, and each of the transistors 43, 43a, 46 and 46a is controlled by the display control unit 35, respectively.

In the remote control drive circuit 40, the respective switching transistors 43 and 45 apply the respective voltages to the terminal 36 only when they are turned on by the control signal, and only when the transistors 43 and 45 are off together, only the voltage at the 5V power supply. The detection voltage Vrem is applied to the terminal 36 via a resistor 42.

When the transistor 43 for directly supplying power from the 5V power supply and the transistor 45 for directly supplying power from the 12V power supply are turned off together, the detection voltage Vrem for the 5V power supply is a variable resistance circuit in the main remote controller 50. It is applied to the parallel circuit of 51 and the operation switch circuit 52 and the series circuit which becomes the resistor 42, and the terminal 36 shows the voltage division according to the combined resistance as terminal voltage V50 according to the operation state of the variable resistance circuit 51 in the main remote control 50. .

Also in the remote control drive circuit 40a, respective voltages are applied together with the remote control drive circuit 40, and when the transistors 43a and 45a are turned off together, the terminal 38 shows the voltage according to the operation state of the remote control 60 as the terminal voltage V60.

The display controller 35 controls each remote controller 50, 60 according to the control state of the sequence controller 31 through the remote controller drive circuits 40, 40a having the above configuration.

The control of lighting, blinking and extinguishing of each lamp is the operation state of gas water heater 1 as the operation standby state, whether it is burning or when there is an abnormality, and whether or not the remote control is a priority state. The display is performed separately for every 60.

The combustion lamps L1 and L3 are lit continuously during combustion when the flame is detected by the frame rod 15 irrespective of the priority of the remote control, and flicker as an abnormal detection state in the case of ignition failure or misfire during combustion.

The operation lamps L2 and L4 are turned on in the remote control that is in the priority side during operation standby and combustion, and flicker in the case of the main remote control 50 in the remote control that is in the non-priority side, and in the case of the sub remote control 60.

When an abnormality occurs, first, the lamp is turned off without turning on regardless of non-priority.

The priority lamp L5 in the sub-remote control 60 lights or blinks in response to the lighting of the operation lamp L4 or the flashing of the combustion lamp L3 only when the sub-remote control 60 in which the priority switch SW2 and the display switch SW3 are closed has priority.

Table 1 shows the relationship between the display state in each of the remote controllers 50 and 60 and the operation state of the gas water heater 1.

TABLE 1

The control of the remote control drive circuit 40 by the display control unit 35 will now be described.

That is, the remote control driver 40a is described in parentheses ().

(1) When only the operation lamp L2 (L4) is turned on without the combustion lamp L1 (L3) turned on, the transistor 45 (45a) is turned on and the power from the 12V power supply is almost continuous as shown in FIG. Supply by In this case, since the set temperature signal may be read from the remote control under this control, the time for supplying only the detection voltage Vrem from the 5V power supply is 30mS for 3mS by stopping the power supply from the 12V power supply for a small time. The interval is set.

(2) When only the operation lamp L2 (L4) flashes without turning on the combustion lamp L1 (L3), the transistor 45 (45a) is turned on and off in accordance with the flashing cycle, as shown in FIG. To intercept and supply power. The flashing cycle at this time is, for example, 2.7 sec on and 2.7 sec off.

(3) When the combustion lamp L1 (L3) and the operation lamp L2 (L4) are turned on together, the transistor 43 (43a) is turned on to continuously supply the power from the 5V power supply and simultaneously control the transistor 45 (45a). For example, by repeating a constant pulse of 10 mS pulse period, 5 mS on and 5 mS off are repeated, and the power from the 12 V power source converted into pulse as shown in FIG. 9 overlaps with the power from the 5 V power source. To feed. Also in this case, the time when the power from the 5V power supply and the power from the 12V power supply are stopped together and only the detection voltage Vrem is supplied is provided at intervals of 30mS for each 3mS.

(4) When only the combustion lamp L1 (L3) is turned on continuously and the operation lamp L2 (L4) is blinking, for example, as described in (3) above, for example, from a 12 V power source converted into a continuous pulse of 10 mS pulse period. The power is continuously supplied, and the transistor 43 (43a) is turned on and off in response to the period of incidence to control the power from the 5V power supply to change in response to the flashing cycle as shown in FIG.

(5) When only the combustion lamp L1 (L3) flashes without turning on the operation lamp L2 (L4), the transistor 43 (43a) is fixed to off to stop the power from the 5V power supply. As shown in the figure, the power from the 12V power source converted into a continuous pulse of 10mS pulse period is intermittently supplied according to the flashing cycle which repeats on and off of 1 sec. The transistor 43 (43a) for directly supplying power from the 5 V power supply and the transistor 45 (45a) for directly supplying power from the 12 V power supply are turned off at the same time, and only the detection voltage Vrem from the 5 V power supply is continuously supplied. At this time, combustion lamp L1 (L3) and operation lamp L2 (L4) do not light together.

In each of the above cases (2) to (4), it is possible to read the operation state of the remote controller 50 (60) even when each lamp is on or flashing, so as in the case of (1), 5V The time for supplying only the detection voltage Vrem from the power supply is provided at intervals of 30 mS in steps of 3 mS.

In this case, since only the detection voltage Vrem is supplied for a very short time of 3 mS, it is possible to display the lighting and blinking of each lamp without visual problems.

In the sequence control section 31 described above, when 0.05 or less as the short-circuit detection voltage between the terminals 36 and 37 is detected, the respective transistors 43 and 45 in order to protect the transistors 43 and 45 in the remote control drive circuit 40 from damage or the like are not included. Power supply is stopped by controlling 45 to not turn on.

When 0.05 V or less as the short-circuit detection voltage between the terminals 38 and 39 is detected, the power supply by the transistors 43a and 45a in the remote control drive circuit 40a is stopped.

The water quantity control part 34 controls the electric-powered water quantity control apparatus 18 from the detected temperature information by the tapping temperature thermistor 25, and restrict | limits the flow volume more than a heating capability through the heat exchanger 13. As shown in FIG.

Next, the operation of the gas water heater 1 of the present embodiment having the above configuration will be described with reference to FIG.

When the control device 30 is connected to the electric wire and is in the start standby state, when the operation switch SW1 of the main remote control 50 is operated and detected (YES in step 1), the control unit 30 is set to the operation standby state and selected according to the setting state of the priority switch SW2. The operation lamp of the remote controller lights up and the operation lamp of the non-priority remote control lights up or flashes (step 2). At this time, if the sub remote control 60 is selected, the priority lamp L5 lights together with the operation lamp L4.

At this time, only the detection voltage Vrem is applied to the selected remote controller at a predetermined cycle as shown in FIG. 7, and the user sets the tapping temperature by the variable resistance circuit of the selected remote controller while each lamp is lit or flashing. The terminal voltage corresponding to the resistance value of the variable resistance circuit is read out as the set temperature signal (step 3).

At this time, the detection temperature signal is also read and read for the tapping-on thermistor 25, and the combustion amount is determined using these as heating information.

Subsequently, when the hot water supply (not shown) is detected and the water flow in the heat exchanger 13 is detected (YES in step 4), ignition control is performed in a predetermined sequence (step 5), and combustion starts.

At this time, the blower 12 and the constant pressure proportionality valve 23 are controlled based on the predetermined combustion amount, and combustion starts with the combustion amount according to a set temperature.

When ignition is detected (YES in step 6), the combustion lamps of the respective remote controllers light up together (step 7).

At this time, if ignition is not detected within a predetermined time (No in step 6), the operation lamp is turned off and the combustion lamp is turned on (step 8).

Here, in the remote control driver circuits 40 and 40a, the transistors 43 and 43a are fixed off to stop the power supply from the 5V power supply, and the transistors 45 and 45a are turned on for 1 sec on and 1 sec with a continuous pulse of 10 mS in pulse period. By repeatedly controlling the off, as shown in FIG. 11, the power from the 12V power source converted into pulses is interrupted according to the flashing cycle and supplied to the main remote controller 50 and the sub remote controller 60.

As a result, only the combustion lamps L1 and L3 flash without turning on the operation lamps L2 and L4 so that it is known that an abnormal state is present.

Thereafter, the flashing of the combustion lamp continues while the OFF signal is not given by the operation switch SW1 (No in step 9), and when the operation switch SW1 is operated to give an off signal (YES in step 9), the combustion lamp goes out. (Step 10).

When combustion is being performed, even if misfire is detected (YES in step 11), step 8 and later are executed.

If the misfire is not detected after the ignition detection (No at step 11) and the flow of water does not stop (No at step 12), the process is repeated after step 7 and thereafter, the set temperature and the tapping temperature are continuously read at predetermined intervals. The amount of combustion that it meets is determined.

When the flow of water stops (YES in step 12), combustion stops and the combustion lamp goes out (step 13).

After that, when the OFF signal by the operation switch SW1 is not given (No in step 14), the processing shifts to step 2, and the operation standby state is returned.

If a signal is given by the operation switch SW1 after the combustion is stopped (YES in step 14), the operation lamp goes out (step 15) and the control ends.

In addition, if the instruction to start operation by the operation switch SW1 is not given, combustion does not start even if there is water flow.

As described above, in the present embodiment, since each lamp having a remote controller can be turned on or blinked independently, the display function can be expanded, for example, the abnormal detection state can be effectively displayed in the abnormal detection state.

In the present embodiment, although the flow of water is detected by the water flow switch, the flow of water may be detected by the flow rate detection signal of the flow sensor.

In the above embodiment, the gas hot water heater is described, but the present invention is not limited to the combustion device of the hot water heater, but may be an air conditioner or lighting device such as an air conditioner or the like having a notification element on the operation unit.

Claims (1)

A rectifying circuit for rectifying an AC component in a supply voltage having a constant voltage direction, a first capacitor charged by the output of the rectifying circuit, and a first driving element for driving the first display element when the charging voltage of the first capacitor is equal to or higher than a predetermined voltage. A first display circuit comprising one switching element; A charge / discharge circuit which charges the second capacitor through the resistor by the supply voltage and discharges the charge reduction of the second capacitor through the diode; and when the charging voltage of the second capacitor is equal to or higher than a predetermined voltage. A second display circuit comprising a second switching element for driving is provided in the remote control unit, connected in parallel to a variable resistance circuit for setting an operation state of the gas water heater, and the control unit connected through the remote control unit and two wires is connected to the variable resistor. A constant voltage for detecting an operation state of the circuit is applied to the remote controller operation unit to control the gas water heater in accordance with the operation state of the variable resistance circuit, and at the same time, according to the operation state of the gas water heater. In the control device of the gas water heater for supplying a voltage for operating the second display circuit independently, wherein When the abnormal state of the ignition misfire and misfire detection in the fisherman the first display device and a control method of the second display a remote control panel having a multiple of a display device a device for the control panel, characterized in that for at least each independently flashing.

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