JPH02280499A - Remote controlling device having display element at its operating section - Google Patents

Abstract

PURPOSE:To confirm whether or not a device is in operation after the command of operation by changing an applied voltage into a light enable voltage of a light emitting diode when an operating detection means detects the device operation. CONSTITUTION:An operating section 50 in which an operating switch 50a and a vari able resistor circuit 51 are connected in series and a light emission circuit 59 is con nected in parallel with the variable resistor circuit 51 and a control section 30 in which a voltage detection section 41 is provided and a voltage detection section 42 detects a voltage regulated by the operating section 50, its operation is started when the detected voltage is within a prescribed voltage and the operating state is controlled, are provided to the remote controller. In this case, the control section 30 is provided with an operation detection section and a voltage change means. Thus, when the operation switch 50a is closed and a voltage is detected by the voltage detection section 42, the operation is started, the device is operated, and when it is detected by the operation detection means, the voltage applied from the voltage supply section to the operation section is changed into a light emission enable voltage. Thus, the operation of the device is confirmed after the operation switch is applied.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides instructions to a control circuit that controls a device from an operation section located away from the control circuit, and also displays the operating status of the device. The present invention relates to a remote control device including a display element in an operation section.

[Prior Art] An example of a remote control device having a display element in its control section is the invention disclosed in Japanese Patent Publication No. 8878/1988.

As shown in FIG. 8, the remote control device aioo of the present invention has a main body control circuit 1 connected by two remote control wires X and Y.
10 and a remote control circuit 120, the remote control circuit 1
20 is an operation switch 121, a resistor 122, and a light emitting element 1
23, a resistor 122 and a light emitting element 1
23 and a variable resistance circuit 124 connected in parallel to the variable resistance circuit 23.

In this invention, from the main body control circuit 110 to the remote control circuit 1
20 is always supplied with a constant voltage from a DC power supply, and when the operation switch 121 is closed, the main body control circuit 11
The current from 0 flows to the light emitting element 123 and the light emitting element 123
emits light, and the connection terminal 1 of the main body control circuit 110
Between 11 and 112, a voltage due to the current flowing through the series circuit is detected, and the combustion control circuit 130 starts controlling the drive device 140 that drives a combustion device such as a burner or a fan. At this time, the temperature setting circuit 113 of the main body control circuit 110
In this case, the target temperature is set according to the voltage value between the connection terminals 111 and 112, which decreases 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. do.

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

[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 123 lights up regardless of the operating state of the combustion device. Element 12
When 3 lights up, it is determined that the combustion device is definitely working.

However, in the case of a gas water heater, for example, combustion starts simultaneously with water flow, and combustion needs to be continued while water flow is performed.

In such a gas water heater, when the remote control device of the invention described in item 1 is used, when the operation switch is operated, the operator assumes that the gas water heater has started operating due to, for example, a light-emitting element lighting up, and leaves the area unattended. It's easy for people to move away or start doing other things, and less attention is paid to the gas water heater.

Therefore, if the gas water heater does not start combustion normally after it has been activated, and an abnormality is detected, even if this is displayed on the light emitting element, the user's attention is less likely to be directed to the gas water heater. The problem is that it is difficult to convey the message sufficiently.

An object of the present invention is to be able to check the operation of a device after turning on an operation switch in a remote control device including a display element in the operation section.

[Means for Solving the Problems] The present invention includes an operating section in which an operation switch and a variable resistance circuit are connected in series, and a light emitting circuit including a light emitting element is connected in parallel with the variable resistance circuit, and a voltage is applied to the operating section. and a voltage supply unit for applying a voltage, and starts operation based on a voltage value within a predetermined voltage range detected by a voltage detection unit for detecting the voltage adjusted by the operation unit, and determines the operating state. ``A remote control device in which the operation section and the control section are connected by two electric wires.'' a detection means and a voltage changing means for changing the voltage applied from the voltage supply section to the operation section, the voltage supply section applying in advance to the operation section a voltage that disables light emission of the light emitting element;
When the operation detecting means detects the operation of the device, the voltage changing means changes the voltage applied from the voltage supply section to the operation section to a voltage that enables the light emitting element to emit light. do.

[Operation] In the present invention, when the operation switch is closed and the voltage is detected by the voltage detection section, operation is started.

At this time, the light emitting element does not emit light because a voltage that disables the light emitting element from emitting light is applied from the voltage supply section to the operation section.

When the device is activated and detected by the activation detection means, the voltage applied from the voltage supply section to the operating section is changed to a voltage that enables light emission. Therefore, the light emitting element emits light.

[Effects of the Invention] In the present invention, even if the operation switch is turned on, the light emission display is not performed unless the operation of the device is detected.

Therefore, it is possible to check whether the device has operated after instructing the device to operate.

[Embodiment] Next, a remote manipulation device according to the present invention having a display element in the operating section will be described based on an embodiment shown in the drawings.

Inside the combustor case 10 of the gas water heater 1 shown in FIG.
A burner group 11 including a plurality of burners is provided. A blower 12 is provided below the combustor case 10 for supplying combustion air to the burner group 11.

A water tube type heat exchanger 13 is provided above the burner group 11 in the combustor case 10, and water passing through the interior is heated by combustion heat from the burner group 11. Combustor case 10
A sparker 14 for igniting the burner group 11 is provided in the vicinity of the burner group 11, and a flame rod 15 for detecting ignition of the burner group 11 is provided to confirm the operation of the gas water heater 1. There is. 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.
A plurality of fuel injection ports 16a for ejecting fuel gas are provided corresponding to each burner.

The fuel pipe 20 that guides the fuel gas to the nozzle pipe 16 includes two electromagnetic valves 21 and 22 that allow the fuel gas to pass when energized, and a governor that adjusts the amount of fuel gas supplied 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 17 that leads water from a water supply source (not shown) to the heat exchanger 13 is equipped with an electric water flow control device 18 for adjusting the amount of hot water supply, and a water flow switch 19 for detecting the amount of water passing through the heat exchanger 13. A hot water supply pipe 17a which is provided sequentially from the upstream side and which guides hot water flowing out from the heat exchanger 13 to a hot water supply port (not shown) is equipped with a hot water outlet temperature thermistor 25 that detects the outlet temperature of hot water flowing out from the heat exchanger 13. ing.

The control device 30, as shown in FIG. , drives the governor proportional valve 23, etc.

Further, the control device 30 instructs to start operation, and
In order to set the hot water temperature, the main controller 50 is provided in the kitchen or the like, and the sub-controller 60 is provided in the bathroom, for example.
It is connected to the control circuit 31 via.

The remote control interface circuit 40 (hereinafter referred to as the "remote control circuit 40"), as shown in FIG. 6
It has each functional part of voltage detection part 42,43 which detects the voltage from 0.

The stabilized power supply 41 always 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 circuit 80.80a switches the predetermined voltage Va of the stabilized power supply 41 according to the signal from the control circuit 31, and connects each controller 50.
60.

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

Zener diode 81 connects stabilized power supply 41 and terminal 41
A, the cathode is connected to the stabilized power supply 41 side, and the anode is connected to the terminal 41AR, and the Zener diode 81 has a breakdown voltage Vbd of 10 [V].

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

These transistors 82, 83 perform a switching operation according to a control signal from the control circuit 31, and when each transistor 82, 83 is on, a predetermined voltage Va is applied to the terminal 41A, and when it is off, a predetermined voltage Va is applied to the terminal 41A. , 2 [V] is applied without decreasing by the breakdown voltage Vbd of the Zener diode 81.

The switching circuit 80a has the same configuration as the switching circuit 80, and changes the voltage applied to the terminal 41B according to the control signal of the W control circuit 31.

The voltage detection unit 42 detects a voltage V from the main controller 50 appearing across the resistor 44 via the terminal 42A. is detected and transmitted to the control circuit 31 as an operation start instruction signal and a temperature setting signal.

The voltage detection unit 43 detects the voltage 6° from the sub-controller 60 appearing across the resistor 45 via the terminal 42B, and transmits it to the control circuit 31 as a controller selection signal and a temperature setting signal.

The main controller 50 has terminals 50A and 50B connected to the terminal 41A of the remote control circuit 40 via connection lines 71 and 72.
, 42A, respectively, and the operation switch 50
A predetermined voltage Va applied to the terminal 50A when the terminal 50A is closed is lowered by an adjustment circuit 51 made up of a plurality of resistors, and sent to the remote control circuit 40 from the terminal 50B.

The yA node circuit 51 is provided between terminals 50A and 50B via an operation switch 50a, and includes a variable resistor 52 for temperature adjustment, a fixed resistor 53, and a semi-fixed resistor 5 for fine adjustment.
4 are connected in series.

The main controller 50 also has an output circuit of a bridge diode 55 connected in parallel to the adjustment circuit 51.
Five light-emitting circuits each consisting of a resistor 56, a light-emitting diode 57, and a semi-fixed resistor 58 are provided, and the light-emitting diode 57 lights up in response to a predetermined voltage Va applied in response to the operation of the gas water heater 1, indicating that the gas water heater 1 is in operation. It is a combustion lamp to let you know that it is.

The sub-controller 60 has terminals 60A and 60B connected to the terminal 41B of the remote control circuit 40 via connection lines 73 and 74.
The predetermined voltage Va applied to the terminal 60A is lowered by C by an adjustment circuit 61 made up of a plurality of resistors and sent to the remote control circuit 40 from the C1 terminal 60B.

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

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

Here, if the purpose is simply to switch the voltage to be regulated to outside the predetermined voltage range, only the changeover switch 92 is provided,
It is sufficient to cut off the power supply to the sub-controller 60, but since the sub-controller 60 also needs to be informed by the light-emitting diode 67 that the gas water heater 1 is operating, the adjustment circuit 61 can be turned off by opening the changeover switch 91. On the other hand, the fixed resistor 93 increases the voltage drop so that a low voltage outside the predetermined voltage range is sent from the terminal 60B.

As shown in FIG. 4, the light emitting diodes 57.67 provided in each controller 50.60 produce a forward current If below a rising voltage Vtr when a forward voltage Vf is applied.
does not flow, and only when the rising voltage Vtr is exceeded does the forward current If flow. Further, the relative brightness with respect to the forward current If is approximately proportional to the forward current If, as shown in FIG.

Therefore, no light is emitted below the rising voltage Vtr.

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

The control circuit 31 has a remote control selection function and selects a voltage V (, 6) from the sub-controller 60 appearing across the resistor 45 via the terminal 42B in order to obtain a set temperature signal in the C1 temperature control. Select the controller.

Here, as shown by the diagonal line A in FIG. 6, if the voltage V6 from the sub-controller 60 is less than 2 [71], the main controller 50 is selected, and if it is in the range of 2 to 4 [V], the main controller 50 is selected. selects the sub-controller 60, and sets the voltages 5o and 6° of the respective controllers 50 and 60 as set temperature signals.

As a result, the sub-controller 60 can prioritize the setting of the hot water temperature.

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

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

At time t1, when the user presses the operation switch 50a of the main controller 50, current flows to the adjustment circuit 51 in the main controller 50 via the terminal 41A, the connection line 71, and the terminal 50A. At this time, the voltage of terminal 41A ■1
is the voltage drop caused by the Zener diode 81.
[2] In the light emitting circuit 59, a voltage lower than the rising voltage Vtr is applied to the light emitting diode 57, and the light emitting diode 57 is not conductive, so the light emitting diode 57 does not emit light.

On the other hand, a voltage V, which corresponds to the voltage drop of the adjustment circuit 51, is applied across the resistor 44. appears in the control circuit 31,
When it is detected that the operation switch 50a has been closed, control for a startup standby state is started, and in response to a water flow signal from the water flow switch 19, a startable state is achieved.

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

As a result of the ignition control, when ignition in the burner group 11 is detected by the flame rod 15 at time 3, the control circuit 31
A switching signal is sent from the switching circuit 80, 80a to each switching circuit 80, 80a. Then, the switching circuit 80.80
At a, each transistor 82.83 is turned on, so
1 as a predetermined voltage Va to each controller 50.60.
2[Vco is applied.

Therefore, in each controller 50.60, a voltage equal to or higher than the rising voltage Vtr is applied to the light emitting diode 57.67, and the light emitting diode 57.67 emits light to notify that combustion has started.

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

When combustion starts, a controller is selected according to the state of the changeover switch 91, 92 of the sub-controller 60, temperature control is performed according to the set temperature based on the setting state of the selected controller, and combustion and is adjusted.

For example, at time t4 during combustion, if a misfire occurs for some reason and the flame is no longer detected by the flame rod 15, as shown by the broken line B, each electromagnetic valve 21, 22 is tapped and the fuel gas is At the same time as the supply is stopped, a pulsed switching signal that repeats on and off at regular intervals is sent from the control circuit 31 to each switching circuit 80.80a, and the voltage V1 of the terminal 41A changes as shown by the broken line C. do. Then, the light emitting diodes 57, 67 of each controller 50, 60 blink in response to the applied voltage, as shown by the broken lines, to notify that it is in an abnormal state.

At this time, when the user notices the abnormality alarm and turns off the operation switch 50a, no voltage appears across the resistor 44, so the control circuit 28 indicates that the instruction to stop operation has been issued.
31, and the operation is stopped.

On the other hand, even if water supply is started and ignition control is performed, ignition is not performed for some reason such as fuel gas not being supplied or spark discharge not being performed, and the - point ff11 ! As shown in F, frame rod 1
If no flame is detected by 5, no switching signal is sent to each switching circuit 80.80a;
The voltage of terminal 41A ■1 is 2 [
■], each light emitting diode 57.6
No. 7 does not emit light as shown by the dashed line G.

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

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

As described above, according to this embodiment, the light emitting diode for combustion indication displays light emission not in response to the operation of the operation switch, but in response to whether combustion has started, making it easy to start combustion. It can be confirmed. Therefore, there is no possibility of filling the hot water by supplying unheated water by mistake.

Furthermore, since it is only necessary to provide two connection lines between each controller 50, 60 and the control device 30,
It is possible to reduce the number of requests for wiring work, and there is no need to worry about incorrect wiring.

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

In the above embodiments, a gas water heater is shown, but the present invention is not limited to a combustion appliance having a plurality of operation parts, and may also be an air conditioner such as a cold room or a lighting fixture having a plurality of operation parts.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing the connection state between the remote control circuit and each controller in the gas water heater control device of this embodiment;
Fig. 2 is a schematic elliptical diagram showing the outline of the gas combustion water heater of this embodiment, Fig. 3 is a functional block diagram showing the functional configuration of the control device of this embodiment, and Fig. 4 is a forward direction of the light emitting diode. FIG. 5 is a characteristic diagram showing the relationship between forward current and relative brightness of the light emitting diode, and FIG. 6 is a characteristic diagram showing the relationship between the voltage and current of the light emitting diode. FIG. 7 is a time chart 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 (equipment), 15... Frame rod (operation detection means), 30... Control device (remote operation device) 31... Control circuit (control unit), 41...・・・
Stabilized power supply (voltage supply section), 42... Voltage detection section, 5
0... 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 changing means).

Claims (1)

[Scope of Claims] 1) An operating section in which an operation switch and a variable resistance circuit are connected in series, and a light emitting circuit including a light emitting element is connected in parallel with the variable resistance circuit, and an operating section for applying a voltage to the operating section. a control unit that includes a voltage supply unit and starts operation based on a voltage value within a predetermined voltage range detected by a voltage detection unit for detecting the voltage adjusted by the operation unit, and controls an operating state; In a remote control device in which the operation section and the control section are connected by two electric wires, the control section includes an operation detection means for detecting that the device is operated, and a voltage supply section that connects the operation section to the control section. voltage changing means for changing the voltage applied to the operating section, the voltage supply section applying in advance a voltage that disables the light emitting element to emit light to the operating section, and the operation detecting section changing the voltage applied to the operating section. When detecting this, the voltage changing means changes the voltage applied from the voltage supply section to the operating section to a voltage that enables the light emitting element to emit light. Device.