JPS609575Y2 - remote control circuit - Google Patents

Description

[Detailed Description of the Invention] This invention relates to, for example, a remote control circuit for a combustion machine.

Traditionally, the remote control circuits of combustion machines have been designed so that even amateurs without special qualifications can work on them, and in the case of outdoor combustion machines in particular, there is no risk of electric shock because the control section is exposed to rainwater during operation. For this reason, a weak current/low voltage circuit was required.

Also, the number of leads had to be kept as small as possible to reduce the probability of miswiring.

This idea was made in view of the above-mentioned circumstances.
The present invention aims to provide a remote control circuit that can satisfy conventional requirements with a simple circuit configuration.

Hereinafter, one embodiment of this invention will be explained according to the circuit.

In the figure, 1 is a DC power supply, 2 is a switching circuit,
It has a Darlington connection circuit made up of transistors 3 and 4 and resistors 5, 6, and 7 inside.

8 is a combustion control circuit, ie, a first load circuit, which controls the load of the combustion machine body (for example, a blower that supplies combustion air, etc.); 9 is a double-pole, double-throw switch; one normally open switch 9;
The combustor main body is operated and stopped by the button a, and the hot water circulation pump is stopped by the other normally closed switch 9b.

Reference numeral 10 denotes an operation indicator light composed of a light emitting diode, 11 a diode, 12 a control circuit for the hot water circulation pump, that is, a second load circuit, 13 a current limiting resistor for the operation indicator lamp 10, and 14 a circulation pump control circuit. 12 is a current-limiting resistor, 15 and 16 are resistors, and 17 is a remote control box, which is composed of a single-pole double-throw switch 18 that has a normally open contact 18a, a normally closed contact 18b, and a switching contact 18c, that is, an operation switch and a light emitting diode. Built-in operation indicator light 19,
By using the switch 18, the combustion control circuit 8 and the hot water circulation pump control circuit 12 can be started and stopped at the same time.

Reference numeral 20 is a terminal for connecting the remote control box 17, and 21 is a jumper wire, which can be removed when the remote control box 17 is connected.

Next, the operation of the above embodiment will be explained.

That is, when the remote control box 17 is connected, the operation switch 9 on the main body and the operation switch 18 inside the remote control box are connected.
When both are OFF (the state shown in the figure), one switching circuit 2 is connected from the DC power supply 1 through the resistor 15.
A current flows through the switching circuit 2a, turning on the switching circuit 2a, stopping the operation of the combustion control circuit 8, and turning off the indicator lights 10 and 19 on the main body side and the remote control side because no current flows therein.

In addition, the other switching circuit 2b is turned off because its base and emitter are shorted by the switch 9b.
[, and the operation of the hot water circulation pump control circuit 12 is also stopped.

Next, when the operation switch 9a of the main body is turned on, the switch 9b is always open, but the connection between the base and emitter of the other switching circuit 2b is established via the operation switch 18 in the remote control box and the operation switch 9a of the main body. Due to the short circuit, the operation of the hot water circulation pump control circuit 12 remains stopped.

Since the other circuit operations are the same as described above, the operation of the combustion control circuit 8 also remains stopped.

Then, turn on the operation switch 18 in the remote control box.
When it is set to N, a current flows from the DC power source 1 through the resistor 13, the main unit operation indicator 10, the remote control operation indicator 19, the operation switch 18 in the remote control box, and the main unit's operation switch 9a, and the main unit side and remote control side Operation indicator light 10.
19 lights up.

Then, since the same current as described above flows through the resistor 15 and the diode 11, one of the switching circuits 2a is turned off and the combustion control circuit 8 starts operating.

On the other hand, since current flows from the DC power source to the other switching circuit 2b via the resistor 16, the switching circuit 2b
ONL, the hot water circulation pump control circuit 12 also begins to operate.

In this way, the combustion machine and hot water circulation pump will not operate unless both the operation switch on the main unit and the operation switch on the remote control are turned on.
It has the same function as the conventional one, in that the combustion engine can be stopped by switching to FF.

As described above, according to this invention, the remote control circuit can
The low-voltage circuit allows wiring to be done even by amateurs, simplifying construction work, and since a single remote control switch is used to start/stop each load and display the operation, wiring connections are easy. The number of required lead wires can be omitted by one, and this has various advantages as a remote control circuit.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of this invention. In the figure, 1 is a DC power supply, 2a and 2b are switching circuits,
8 is a combustion control circuit, that is, a first load circuit, 9 is a double-pole double-throw switch, 10.19 is an indicator light, 11 is a diode, 12
17 is a remote control box, and IB is a single-pole double-throw switch.

Claims (1)

[Scope of utility model registration request] The impedance element and the first and second
a first series circuit consisting of a light emitting diode, a second series circuit connected in parallel to this series circuit and consisting of an impedance element and a diode, and a second series circuit connected to the anode side of the diode via a first switching circuit. 1 load circuit, a single-pole double-throw for remote control, having a normally open contact connected to the cathode side, a normally closed contact opposite this contact, and a switching contact connected to both of the contacts. a switch, a second load circuit connected to the normally closed contact of the switch via a second switching circuit, a normally open switch connected between the changeover contact of the switch and ground, and interlocked with the switch; A remote control circuit comprising a double-pole, double-throw switch having a normally-closed switch that connects a normally-open contact of the switch and a second switching circuit to ground.