JPH0777471B2 - Remote operation device with a display element in the operation section - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention gives an instruction to a control circuit for controlling a device from an operation section provided at a place distant from the control circuit, and displays an operating state of the device. The present invention relates to a remote control device including a display element for operating a control unit.

[Prior Art] An example of a remote operation device having a display element in an operation portion is disclosed in Japanese Patent Publication No. 64-8878.

The remote control device 100 of the present invention, as shown in FIG.
Main unit control circuit 110 connected by two remote control lines X and Y
The remote control circuit 120 includes a series circuit including an operation switch 121, a resistor 122, and a light emitting element 123, and a variable resistance circuit 124 connected in parallel with the resistor 122 and the light emitting element 123. ing.

In the present invention, a constant voltage is constantly supplied from the main body control circuit 110 to the remote control circuit 120, and when the operation switch 121 is closed, the current from the main body control circuit 110 flows to the light emitting element 123. While the light emitting element 123 emits light, a voltage due to the current flowing through the series circuit is detected between the connection terminals 111 and 112 of the main body control circuit 110, and the combustion control circuit 130 drives the burner, fan, or other combustion device. The control of the device 140 is started. At this time, in the temperature setting circuit 113 of the main body control circuit 110, the target temperature is set according to the voltage value between the connection terminals 111 and 112 that drops according to the set resistance value of the variable resistance circuit 124, and the combustion control circuit 130 Controls the combustion device according to the target temperature.

Thereafter, for example, when an abnormality is detected by the combustion control circuit 130, the combustion device is stopped and the DC power supplied to the remote control circuit 120 is interrupted, and the light emitting element 123
Flashes.

[Problems to be Solved by the Invention] As described above, in the above invention, when the operation switch 121 is closed, the light emitting element 12 is irrespective of the operating state of the combustion device.
Since 3 is lit, the user will determine that the combustion device has operated reliably when the light emitting element 123 is lit.

However, in the case of, for example, a gas water heater, combustion must be started simultaneously with water flow, and must be continued while water is being flowed.

In such a gas water heater, when the remote control device of the above invention is used, when the operation switch is operated, it is assumed that the operation of the gas water heater has started due to, for example, the lighting of the light emitting element, and the operator leaves the place. It is easy to lose attention to the gas water heater by getting rid of it or starting other things.

Therefore, when combustion is not normally started and an abnormality is detected after the gas water heater is activated, even if it is displayed by the light emitting element, attention is not often paid to the gas water heater, so the user Has the problem that it is difficult to communicate.

SUMMARY OF THE INVENTION It is an object of the present invention to be able to confirm the operation of a device in a remote control device having a display element in the operation section after turning on the operation switch.

[Means for Solving the Problem] The present invention relates to a light emitting circuit including a light emitting element and a variable resistance circuit connected in parallel to form a parallel circuit, and an operation switch and an operating section in which the parallel circuit is connected in series, A voltage supply unit for applying a voltage to the operation unit and a voltage detection unit for detecting the voltage adjusted by the operation unit, and based on a voltage value within a predetermined voltage range detected by the voltage detection unit. It consists of a control unit that controls the equipment,
In a remote control device in which the operation unit and the control unit are connected by two electric wires, the control unit includes an operation detection unit that detects that the device is operated, and the voltage supply unit to the operation unit. And a voltage changing unit that changes the voltage applied to the voltage control unit, wherein the control unit applies a low voltage that the light emitting element cannot emit light from the voltage supply unit in advance, and the voltage detection unit closes the switch. When the operation detection means detects the operation of the equipment, the voltage changing means changes the voltage applied from the voltage supply portion to the operation portion,
The technical means is to change to a high voltage at which the light emitting element can emit light.

[Operation] In the present invention, the low voltage is applied in advance from the voltage supply unit, and the operation switch is closed in the operation unit because it is connected in series to the parallel circuit including the light emitting circuit and the variable resistance circuit. Then, the voltage indicating that is detected by the voltage detection unit. At this time, since the applied voltage is a low voltage at which the light emitting element cannot emit light, the light emitting element does not light up even when a current flows through the light emitting circuit.

On the other hand, when the closing operation of the operation switch is detected, the controller starts the operation of the device.

When the operation detecting unit detects the operation of the device, the voltage changing unit changes the applied voltage of the voltage supply unit to a high voltage capable of lighting the light emitting element. Therefore, in the light emitting circuit of the operation unit, the light emitting element is turned on. .

[Effects of the Invention] In the present invention, the light emission display is not performed unless the operation of the device is detected even when the operation switch is turned on. Therefore, it is possible to confirm whether or not the device has operated after instructing the operation. Further, since it is not necessary to determine the closing operation of the operation switch and set the target value for controlling the device in separate voltage ranges, it is possible to set a wide voltage range for setting the target value. Further, in the operation unit, since current does not flow until the operation switch is closed, power consumption is small, and energy consumption during standby of the control unit can be reduced.

[Embodiment] Next, a remote control device having a display element in an operation portion of the present invention will be described based on an embodiment shown in the drawings.

In the combustor case 10 of the gas water heater 1 shown in FIG. 2, a burner group 11 including a plurality of burners is provided.
A blower 12 for supplying combustion air to the burner group 11 is provided below the combustor case 10. A water pipe type heat exchanger 13 is provided above the burner group 11 in the combustor case 10, and the water passing through the inside is heated by the combustion heat of the burner group 11. A sparker 14 for igniting the burner group 11 is provided near the burner group 11 in the combustor case 10, and a frame rod 15 for detecting ignition of the burner group 11 for confirming the operation of the gas water heater 1. Is provided. An exhaust port 2 for discharging combustion exhaust gas to the outside is provided above the combustor case 10.

A nozzle pipe 16 for supplying fuel gas is provided below the burner group 11, and the nozzle pipe 16 is provided with a plurality of fuel ejection ports 16a for ejecting fuel gas corresponding to each burner of the burner group 11. It is provided.

The fuel pipe 20 for guiding the fuel gas to the nozzle pipe 16 has two solenoid valves 21 and 22 for passing the fuel gas when energized, and a governor for controlling the supply amount of the fuel gas by controlling the supply pressure according to the energized current. Proportional valves 23 are provided in order from the upstream side.

A water supply pipe that guides water from a water supply source (not shown) to the heat exchanger 13.
17 is an electric water amount control device for adjusting the amount of hot water supplied.
18, water flow switch to detect the amount of water passing through the heat exchanger 13
19 are provided in order from the upstream side, and a hot water supply thermistor 25 for detecting the hot water discharge temperature flowing out of the heat exchanger 13 is provided in the hot water supply pipe 17a for guiding the hot water flowing out of the heat exchanger 13 to a hot water supply port (not shown). It is equipped.

As shown in FIG. 3, the control device 30 is mainly composed of a control circuit 31 by a microcomputer, and has an input circuit 32.
The detection signals of the hot water temperature thermistor 25 and the frame rod 15 are input by the, and the output circuit 33 drives the blower 12, the governor proportional valve 23, and the like.

Further, the control device 30 includes a main controller 50 provided in a kitchen or the like and a sub-controller 60 provided in, for example, a bathroom in order to instruct the start of operation and set the hot water temperature, and these controllers are provided. Five
0, 60, via the remote control interface circuit 40,
It is connected to the control circuit 31.

Remote control interface circuit 40 (hereinafter "remote control circuit"
40 ”), as shown in FIG.
It has switching circuits 80, 80a for switching the voltage of the stabilized power supply 41 in two stages, and respective function units of voltage detection units 42, 43 for detecting the voltages from the controllers 50, 60.

The stabilized power supply 41 constantly generates a predetermined DC voltage Va when the control device 30 is connected to the power line. Here, 12 [V] is set as the predetermined voltage Va.

The switching circuits 80 and 80a have a predetermined voltage V of the stabilized power supply 41.
a is switched according to the signal from the control circuit 31, and the terminal 41
It is applied to each controller 50, 60 via A, 41B.

The switching circuit 80 includes a Zener diode 81, switching transistors 82 and 83, and a resistor 84.

The Zener diode 81 has a cathode on the side of the stabilized power source 41 and an anode on the terminal 41 between the stabilized power source 41 and the terminal 41A.
Zener diode 81 is connected to the A side,
A breakdown voltage Vbd of 10 [V] is used.

Further, the cathode and anode of the Zener diode 81 are connected to the emitter and collector of a PNP type transistor 82, respectively, and between the base of the transistor 82 and the ground, an NPN type transistor 83 is connected to the emitter grounded and the transistor 83 is connected. A resistor 84 is connected to the base of the.

These transistors 82, 83 perform a switching operation according to the control signal from the control circuit 31, and each transistor 82,
When 83 is on, the specified voltage Va is applied to terminal 41A, and when it is off, the breakdown voltage of Zener diode 81.
2 [V] reduced by Vbd is applied.

The switching circuit 80a has a configuration similar to that of the switching circuit 80, and in accordance with the control signal of the control circuit 31, the terminal 41B.
Change the voltage applied to.

The voltage detection unit 42 detects the voltage V ₅₀ of the main controller 50 appearing at both ends of the resistor 44 via the terminal 42A and transmits it to the control circuit 31 as an operation start instruction signal and a temperature setting signal.

The voltage detector 43 detects the voltage V ₆₀ from the sub-controller 60 appearing across the resistor 45 via the terminal 42B, and outputs it as a controller selection signal and a temperature setting signal to the control circuit.
Transmit to 31.

In the main controller 50, the terminals 50A and 50B are connected to the connecting wire 71,
A predetermined voltage Va applied to the terminal 50A when the operation switch 50a is closed is connected to the terminals 41A and 42 of the remote control circuit 40 via the adjustment circuit 51 including a plurality of resistors. It is lowered and sent from the terminal 50B to the remote control circuit 40.

The adjusting circuit 51 is provided between the terminals 50A and 50B via the operation switch 50a, and a variable resistor 52 for temperature adjustment, a fixed resistor 53, and a semi-fixed resistor 54 for fine adjustment are connected in series. It has a simple configuration.

The main controller 50 also includes a resistor connected to the output circuit of the bridge diode 55 connected in parallel with the adjustment circuit 51.
A light emitting circuit 59 including a light emitting diode 57, a light emitting diode 57, and a semi-fixed resistor 58 is provided, and the light emitting diode 57 lights up according to a predetermined voltage Va applied according to the operation of the gas water heater 1 and is in operation. It is a combustion lamp to let you know.

In the sub controller 60, the terminals 60A and 60B are connected to the connecting wires 73 and 74.
Are connected to terminals 41B and 42B of the remote control circuit 40 via the control circuit 61 and the predetermined voltage Va applied to the terminal 60A is reduced by the adjustment circuit 61 composed of a plurality of resistors.
60B is sent to the remote control circuit 40.

Like the main controller 50, the sub-controller 60 has a control circuit 61 in which a variable resistor 62 for temperature adjustment, a fixed resistor 63, and a semi-fixed resistor 64 for fine adjustment are connected in series, and a terminal.
A light emitting circuit 69 including a resistor 66, a light emitting diode 67, and a semi-fixed resistor 68 is provided in an output circuit of a bridge diode 65 connected in parallel between 60A and 60B.

Further, in the sub-controller 60, in order to switch the voltage adjusted by the adjusting circuit 61 out of the predetermined voltage range, the changeover switch which is interlocked between the adjusting circuit 61 and the terminals 60A and 60B.
91 and 92 are connected in series, and the selector switch 92
A fixed resistor 93 is connected between the contacts 92a and 92b.

Here, if it is only to switch the regulated voltage to the outside of the predetermined voltage range, only the changeover switch 92 may be provided to cut off the power supply to the sub-controller 60. Since it is necessary to notify the sub controller 60 that 1 is operating,
The adjustment circuit 61 is disabled by opening the changeover switch 91, while the fixed resistor 93 increases the voltage drop so that a low voltage outside the predetermined voltage range is transmitted from the terminal 60B.

A light emitting diode 57 provided in each controller 50, 60,
67 is, as shown in FIG. 4, when a forward voltage Vf is applied,
The forward current If does not flow below the rising voltage Vtr, and the forward current If flows only after exceeding the rising voltage Vtr. Further, the relative luminance with respect to the forward current If is almost proportional to the forward current If, as shown in FIG.

Therefore, no light emission occurs at the rising voltage Vtr or less.

Here, the light emitting diodes 57 and 67 have a rising voltage.
A Vtr of about 1.0 [V] was used.

The control circuit 31 has a remote control selection function, and the terminal 42
Sub-controller 60 appearing across resistor 45 via B
The controller for obtaining the set temperature signal in the temperature control is selected according to the voltage V ₆₀ from.

Here, as indicated by the diagonal line A in FIG. 6, when the voltage V ₆₀ from the sub-controller 60 is less than 2 [V], the main controller 50 is selected, and when it is in the range of 2 to 4 [V]. , The sub-controller 60 is selected, and the voltages V ₅₀ and V ₆₀ of the respective controllers 50 and ₆₀ are set temperature signals.

As a result, sub controller 60 can prioritize the setting of the outlet heated water temperature.

Next, the operation of the gas water heater 1 of the present embodiment having the above configuration will be described with reference to FIG. 7 centering on the control of the control circuit 31.

The control device 30 is always in an operation standby state, and the stabilized power supply 41 is generating a predetermined voltage Va. At this time, each transistor in each switching circuit 80, 80a is off.

At time t1, when the user closes the operation switch 50a of the main controller 50, a current flows to the adjustment circuit 51 in the main controller 50 via the terminal 41A, the connecting wire 71, and the terminal 50A. At this time, the voltage V1 of the terminal 41A is 2 [V] dropped by the Zener diode 81, and the light emitting circuit 59
Then, since a voltage equal to or lower than the rising voltage Vtr is applied to the light emitting diode 57 and the light emitting diode 57 does not conduct,
The light emitting diode 57 does not emit light.

On the other hand, since a voltage V ₅₀ corresponding to the voltage drop of the adjustment circuit 51 appears at both ends of the resistor 44, the control circuit 31 detects that the operation switch 50a is closed, and performs control as a start standby state. Is started, and the state becomes ready to start according to the water flow signal from the water flow switch 19.

At time t2, when the user opens the hot water tap and water flows into the heat exchanger 13, which is detected by the water flow switch 19,
Ignition control is performed in a predetermined sequence.

As a result of the ignition control, when the flame rod 15 detects ignition in the burner group 11 at time t3, the control circuit 31 sends a switching signal to each of the switching circuits 80 and 80a. Then, in the switching circuits 80, 80a, since the transistors 82, 83 are turned on, the controllers 50,
12 [V] as the predetermined voltage Va is applied to 60.

Therefore, in each controller 50, 60, the rising voltage Vt
A voltage equal to or higher than r is applied to the light emitting diodes 57 and 67, and the light emitting diodes 57 and 67 emit light to notify that combustion has started.

As a result, the user, after operating the operation switch 50a,
It can be confirmed that combustion has started.

When combustion is started, the controller is selected according to the state of the changeover switches 91 and 92 of the sub-controller 60, and the temperature control is performed according to the set temperature based on the setting state of the selected controller, and the combustion amount Is adjusted.

For example, at a time t4 during combustion, as shown by a broken line B, when the flame rod 15 no longer detects a flame due to some cause, the solenoid valves 21 and 22 are closed to supply the fuel gas. Is stopped and each switching circuit 8
A pulse-shaped switching signal that repeatedly turns on and off at regular intervals is sent to 0 and 80a from the terminal 41.
The voltage V1 of A changes as shown by the broken line C. Then,
The light emitting diodes 57 and 67 of each controller 50 and 60 blink according to the applied voltage, as shown by the broken line D, to notify that there is an abnormal state.

At this time, when the user notices the abnormality notification and turns off the operation switch 50a, since no voltage appears at both ends of the resistor 44, the control circuit 31 detects that the operation stop is instructed, and the operation is stopped. Stop.

On the other hand, even if the water supply is started and the ignition control is performed, the fuel gas is not supplied, the spark discharge is not performed, or the ignition is not performed for some reason. As shown in, when flame is not detected by the frame rod 15, each switching circuit 80,
The switching signal to 80a is not sent and the voltage at terminal 41A
As indicated by the alternate long and short dash line F, V1 continues to be 2 [V], so that the light emitting diodes 57 and 67 do not emit light as indicated by the alternate long and short dash line G.

Therefore, the user can know that the combustion is not performed.

In addition, in this embodiment, if the operation switch 50a is not closed, the combustion is not started even if water is supplied, and unheated water can be supplied.

As described above, according to the present embodiment, the light emitting diode for combustion display does not respond to the operation of the operation switch but performs the light emission display according to whether or not the combustion is started. You can check. Therefore, there is no possibility that unheated water is supplied to fill the water by mistake.

In addition, between each controller 50, 60 and the control device 30,
Since it is sufficient to provide only two connecting wires for each, it is possible to reduce the time and effort required for wiring work, and there is no fear of incorrect wiring.

In the above embodiment, the flame rod is used as the ignition detection means, but a thermocouple may be used for combustion detection.

In the above embodiments, the gas water heater is shown, but the invention is not limited to the combustion equipment having a plurality of operating parts, and may be an air conditioner such as cooling and heating or a lighting fixture having a plurality of operating parts.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a connection state between a remote controller circuit and each controller in a gas water heater controller of the present embodiment,
FIG. 2 is a schematic configuration diagram showing an outline of the gas combustion type water heater of the present embodiment, FIG. 3 is a functional block diagram showing a functional configuration of the control device of the present embodiment, and FIG. 4 is a forward direction of the light emitting diode. FIG. 5 is a characteristic diagram showing the relationship between voltage and current, FIG. 5 is a characteristic diagram showing the relationship between forward current and relative luminance of the light emitting diode, and FIG. 6 is a voltage explanation for explaining remote control selection in the control circuit of this embodiment. 7 and 7 are time charts for explaining the operation of this embodiment, and FIG. 8 is a schematic diagram showing a conventional remote control device. In the figure, 1 ... Gas water heater (device), 15 ... Frame rod (operation detection means), 30 ... Control device (remote operation device), 31 ... Control circuit (control unit), 41 ... Stabilization Power supply (voltage supply unit), 42 ... voltage detection unit, 50 ... main controller (operation unit), 50a ... operation switch, 51 ... adjustment circuit (variable resistance circuit), 57 ... light emitting diode (light emitting element) , 59 …… Light emitting circuit, 71, 72 …… Connection wire (electric wire),
80: Switching circuit (voltage change means).

Claims (1)

[Claims] 1. A light emitting circuit having a light emitting element and a variable resistance circuit are connected in parallel to form a parallel circuit, and an operating switch and an operating section in which the parallel circuit is connected in series, and a voltage is applied to the operating section. A voltage supply unit and a voltage detection unit for detecting the voltage adjusted by the operation unit, and a control unit for controlling the device based on a voltage value within a predetermined voltage range detected by the voltage detection unit. In the remote operation device in which the operation unit and the control unit are connected by two electric wires, the control unit includes an operation detection unit that detects that the device has been operated, and the voltage supply unit to detect the operation. A voltage changing unit that changes a voltage applied to the operation unit, and the control unit applies a low voltage that the light emitting element cannot emit light in advance from the voltage supply unit to detect the voltage. When the closing operation of the switch is detected by the unit, the operation of the device is started, and when the operation detecting unit detects the operation of the device, the voltage changing unit is applied from the voltage supply unit to the operation unit. The remote control device is provided with a display element in the operation section, wherein the voltage is changed to a high voltage at which the light emitting element can emit light.