JPH0426595B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device used, for example, to remotely control a water heater. A display signal output means is connected to a controller by a two-wire transmission/reception cable, and the controller is connected to a display signal output means for outputting a display signal to the transmission/reception cable when the actuating device is operating, and a voltage value or a current value of the transmission/reception cable is controlled. A receiving means for receiving signals is provided, and the remote controller is provided with an operating circuit for changing the voltage value or current value of the transmitting/receiving cable, a display circuit that operates in response to a display signal from the transmitting/receiving cable, and the operating circuit. This invention relates to a remote control device that is equipped with a switch that turns ON/OFF the connection to the transmitting/receiving cable.

[Conventional technology]

In conventional remote control devices of this type, the third
As shown in the figure, the remote controller RB
A switch 11B was installed at the connection between the display circuit 14B and the transmission/reception cable CB, and at the connection between the operation circuit 10B (variable resistor) and the display circuit 14B. In other words, the switch 11B, the operation circuit 11B,
Display circuits 14B were connected in series (documents cannot be shown).

[Problem that the invention seeks to solve]

Therefore, when using the conventional device described above, when a switch is turned OFF to stop remote control using a remote controller, the switch is turned OFF.
As a result, the connection of the operating circuit to the transmitting/receiving cable is cut off, and not only the transmission from the operating circuit to the controller side via the transmitting/receiving cable is stopped, but also the connection of the display circuit to the transmitting/receiving cable is cut off at the same time.

However, remote control devices do not necessarily have one remote controller; for example, in the case of a remote control device for a water heater, it is common to install a remote controller in each of multiple hot water outlets, such as the kitchen, washroom, and bathroom. However, it is also possible to operate the actuator using a controller on the actuator side instead of by remote control.

As a result, the switch on the remote controller
If it is turned OFF, even if the actuating device is operated by the controller or by remote control using another remote controller, this cannot be confirmed using the display circuit of the remote controller, which is inconvenient.

An object of the present invention is to enable the remote controller to confirm that the operating device is operating even if the switch of the remote controller is turned off.

[Means for solving problems]

A characteristic configuration of the remote control device according to the present invention is that the remote controller is provided with an energization guarantee circuit connected in parallel to the operation circuit, and the switch is configured to select between the operation circuit and the energization guarantee circuit with respect to the transmitting/receiving cable. The point is that it is formed into a changeover switch that connects the The effects and effects thereof are as follows.

[Effect]

The switch is a changeover switch, and when the changeover switch is operated to disconnect the operation circuit from the transmission/reception cable, a energization guarantee circuit connected in parallel to the operation circuit in place of the operation circuit is connected to the transmission/reception cable. , it is possible to guarantee that the transmission and reception cable is energized while cutting off transmission from the operation circuit, thereby ensuring that the display signal is input to the display circuit via the transmission and reception cable.

〔Effect of the invention〕

Therefore, according to the present invention, whether the actuating device is operating and the display signal output is being operated by the remote controller, the actuating device controller, or another remote controller. When the display signal is output from the means, the display circuit is reliably operated, and it is possible to know whether or not the actuating device is operated using the remote controller.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

The remote control device for the water heater consists of a controller C installed on the appliance body, multiple remote controllers RA installed in the kitchen, washroom, bathtub, etc.
Connect each of the RBs to a two-wire transmitting/receiving cable CA,
In addition to connecting with a CB, constant current DC power supplies 1A and 1B for transmitting and receiving, and a constant current full-wave rectifying power supply 2 as a second power supply for transmitting and receiving are provided. The type of power source is used as a control signal.

The controller C includes the DC power supply 1 described above.
In addition to A, 1B and the full-wave rectified power supply 2, an energization detection circuit 3 and first and second temperature adjustment signal detection circuits 4
A, 4B, priority detection circuit 5, and combustion detection circuit 6
and a control circuit 7.

The energization detection circuit 3 detects the presence or absence of energization of one transmitting/receiving cable CA connected to one DC power supply 1A, and outputs an operation signal to the control circuit 7 when energization is detected, and an operation stop signal when no detection is detected. It is.

The first temperature adjustment signal detection circuit 4A detects the voltage value of one transmission/reception cable CA as a temperature adjustment signal and outputs it to the control circuit 7.

The second temperature adjustment signal detection circuit 4B is an example of receiving means, and detects the voltage value of the other transmission/reception cable CB as a temperature adjustment signal and outputs it to the control circuit 7.

The priority detection circuit 5 detects whether the voltage value of the other transmission/reception cable CB connected to the other DC power supply 1B is outside the range for temperature adjustment, and when it is within the range, reversibly outputs the priority signal to the It is output to the control circuit 7.

The combustion detection circuit 6 is an example of display signal output means, and detects the presence or absence of combustion in the burner, and when detected, sets the polarity changeover switches 8A and 8B for switching the polarity of the transmitting and receiving cables CA and CB to a second state. In other words, the state is switched to the first state when no detection is detected.

The control circuit 7: [1] puts the water heater into a combustible operating state according to the operation signal from the energization detection circuit 3 and puts it into an operation stop state according to the operation stop signal, [2] the priority detection circuit 5 Due to the input of the priority signal from
Power supply switching that reversibly switches to a temperature control state based on the temperature adjustment signal from the temperature adjustment signal detection circuit 4B, and connects the one transmission/reception cable CA to the DC power supply 1A and the full-wave rectification power supply 2 alternatively. The switch 9 is reversibly switched to the full-wave rectified power supply 2 side. In other words, the control circuit 7 and the power supply changeover switch 9 form a power supply switching means that selectively connects one transmission/reception cable CA to the full-wave rectified power supply 2 or the DC power supply 1A.

One of the remote controllers RA is the main remote controller and has a transmission/reception cable.
A variable resistor 10A for temperature adjustment that changes the voltage value of CA, a connection of this variable resistor 10A to the transmitting/receiving cable CA, that is, an operation switch 11A that turns ON/OFF the current to the variable resistor 10A, and An operation indicator 12 and a priority indicator 13A that use LEDs turn on when the switch 11A is ON and turn off when the switch 11A is OFF, and a combustion indicator 14 that uses LEDs when the polarity selector switch 8A is in the first state.
a combustion indicator circuit 14A (an example of an actuating device) using a diode bridge that turns on the combustion indicator 14a and the combustion indicator 14a when the polarity is in the second state;
An alternating current detection circuit 15 is provided which energizes a transistor Tr connected in parallel to the priority indicator 13A to reversibly turn off the priority indicator 13A when the current is full-wave rectified.

The other remote controller RB is a sub-remote controller and includes a variable resistor 10B for temperature adjustment, a switch 11B, and a priority indicator 13B similar to the main remote controller RA.
, a combustion display circuit 14B, and an energization guarantee circuit 16.

To explain in detail the combustion display circuits 14A and 14B of the remote controllers RA and RB, when the polarity changeover switches 8A and 8B are in the first state, the first diodes DA ₁ and DB ₁ and the variable resistor 10
A, 10B, the second diodes DA ₂ , DB ₂ are energized, and when the polarity selector switches 8A, 8B are in the second state, the third diodes DA ₃ , DB ₃ , the combustion indicators 14a, 14b, and the variable resistor 16A , 16B, and fourth diodes DA ₄ and DB ₄ .

The switch 11B is connected to the variable resistor 10B.
This is a priority switch that also serves as an operation switch, which turns on and off the power supply to the controller C, and when turned on, transfers control of the controller C from the main remote controller RA to the sub remote controller RB. Specifically, this priority switch 11B includes a first switch _S1 interposed in the connection line of the first diode _DB1 of the combustion display circuit 14B to the variable resistor 10B;
a third diode DB ₃ of the combustion display circuit 14B;
The combustion indicator 14b is constructed in conjunction with a second switch _S2 interposed in the connection line to the variable resistor 10B. In addition, the energization guarantee circuit 16 includes a resistor R having a larger resistance value than the variable resistor 10B.
and a first diode DB ₁ and a fourth diode DB 1 at one end.
It is connected to the diode DB ₄ and the other end is connected to the combustion indicator 14b via the second switch S ₂ which is turned off. That is, the energization guarantee circuit 16 is connected in parallel to the variable resistor 10B, and the priority switch 11B is configured as a changeover switch that selectively connects the variable resistor 10B and the energization guarantee circuit 16 to the transmission/reception cable CB. ing.

Next, the operation will be explained.

Main remote controller RA operation switch 1
By turning on 1A, the main remote controller
The variable resistor 10A, the operation indicator 12, and the priority indicator 13A of the RA are energized without passing through the combustion indicator 14a, and the operation indicator 12 and the priority indicator 13A are turned on, and the energization detection circuit 3 of the controller C is turned on.
The operating signal from the first temperature adjustment signal detection circuit 4A
Temperature adjustment signals corresponding to the resistance value of the variable resistor 10A are outputted to the control circuit 7, respectively, and a state in which combustion is possible is achieved.

At this time, in the sub remote controller RB, if the priority switch 11B is OFF, the power to the variable resistor 10B and the priority display 13B is cut off, and the energization guarantee circuit 16 connects the ends of the transmitting and receiving cable CB. is connected, but
Transmission and reception cable CB by third diode DB ₃
The power is cut off. As a result, in the controller C, the priority detection circuit 5 detects that the voltage value is the maximum, that is, it is outside the range for temperature adjustment, and the temperature is determined based on the temperature adjustment signal from the first temperature adjustment signal detection circuit 10A. It becomes a system for controlling.

In this state, when combustion is started by opening a faucet or the like, the combustion detection circuit 6 is activated and the polarities of the transmission and reception cables CA and CB are switched. In the main remote controller RA, variable resistor 1
0A, the energization state to the operation indicator 12 and priority indicator 13A is switched to the state through the combustion indicator 14a, and the transmission/reception cable is connected to the variable resistor 10A.
The control signal for temperature adjustment via CA is maintained, and the combustion indicator 14a lights up. On the other hand, in the sub remote controller RB, the direction of current flow in the third diode DB ₃ is the forward direction, and the combustion indicator 14b is energized through the energization guarantee circuit 16, so that the combustion indicator 14b lights up. At this time, although a temperature adjustment signal is output from the second temperature adjustment detection signal output circuit 4B to the control circuit 7 according to the voltage value of the transmission/reception cable CB, due to the presence of the resistor R of the energization guarantee circuit 16, the voltage Since the value is held outside the range for temperature adjustment and the priority signal is not output from the priority detection circuit 5, the temperature adjustment by the variable resistor 10A of the main remote controller RA is maintained. In other words, for both main and sub-remote controllers RA and RB,
Combustion can be confirmed by lighting the combustion indicators 14a and 14b.

Then, when the priority switch 11B of the sub remote controller RB is turned on while no combustion is occurring,
priority indicator 13B without passing through the combustion indicator 14b;
The variable resistor 10B is energized, the priority detection circuit 5 of the controller C detects a voltage value within the range for temperature adjustment, and a priority signal is output to the control circuit 7. As a result, a system is established to perform temperature control based on the temperature adjustment signal from the second temperature adjustment signal detection circuit 4B, and at the same time, the power supply selector switch 9 is activated and one transmission/reception cable CA is connected to the full-wave rectified power supply 2. .
As a result, in the main remote controller RA, this is detected by the AC detection circuit 15, the transistor Tr is turned on, the power to the priority display 13A is cut off, and the priority display 13A is turned off.

When combustion starts in this state, the combustion detection circuit 6 detects the transmitting and receiving cable CA, as described above.
The polarity of CB is switched, and in the sub remote controller RB, the energization state to the variable resistor 10B and the priority indicator 13B is switched to the state through the combustion indicator 14b, and the temperature is controlled by the variable resistor 10B via the transmission/reception cable CB. The transmission of the control signal for regulation is maintained and the combustion indicator 14b is illuminated. On the other hand, in the main remote controller RA as well, full-wave rectification is indicated by the combustion indicator 14a.
The combustion indicator 14a lights up, and the energization detection circuit 3 is guaranteed to detect energization.
The output of the driving signal is held.

Furthermore, during combustion, even if the priority switch 11B of the sub remote controller RB is turned on, the priority indicator 13B and variable resistor 10B are energized through the combustion indicator 14b.
The priority indicator 13B lights up and a priority signal is output from the priority detection circuit 5, and as described above,
The system switches to a temperature control system based on the temperature adjustment signal from the second temperature adjustment signal detection circuit 4B, and the priority display 1 of the main remote controller RA
3A goes out.

[Another example]

Another example of the present invention will be shown below.

[1] In the above embodiment, the energization guarantee circuit 16 is incorporated in the display circuit 14B.
As shown in the figure, an energization guarantee circuit 16 and a switch 11B may be provided.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a remote control device according to the present invention, and FIG. 2 is a circuit diagram showing another embodiment of the present invention. FIG. 3 is a circuit diagram showing a conventional example. 1B...Power supply, C...Controller, RB...
Remote controller, CB...transmission/reception cable,
6... Display signal output means, 4B... Receiving means, 1
0B...Operation circuit, 14B...Display circuit, 11B
...Switch, 16...Electricity guarantee circuit.

Claims (1)

[Claims] 1 Controller C on the actuating device side equipped with power source 1B for transmission and reception and remote controller RB are connected to 2
A display signal output means 6 is connected to the transmission/reception cable CB of a wire type and outputs a display signal to the transmission/reception cable CB when the actuating device is operating, and the voltage value or current value of the transmission/reception cable CB is transmitted to the controller C. Receiving means 4 receiving as a control signal
B, and the remote controller RB,
An operating circuit 10B for changing the voltage value or current value of the transmitting/receiving cable CB, a display circuit 14B that operates in response to a display signal from the transmitting/receiving cable CB, and a connection of the operating circuit 10B to the transmitting/receiving cable CB are turned ON/OFF. Switch 11 to turn off
B, the remote controller RB is provided with the operating circuit 10B.
An energization guarantee circuit 16 is provided which is connected in parallel to the transmitting/receiving cable.
Operation circuit 10B and energization guarantee circuit 16 for CB
A remote control device formed on a changeover switch that selectively connects the