JPS6318098Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a load operating device that turns on and off different loads using one switch.

Conventionally, this type of device has been used to switch on a load A, such as a lighting fixture, using a single switch as shown in FIG.
When load B, which is a ventilation fan, is turned on and turned off after it has been used, only load B, which is a ventilation fan, is turned off after a certain period of time T using, for example, an oil dump pot. As shown in Figure 2, two switches must be used to turn on load B after load A is turned off, and then turn off load B after a certain period of time T, making the wiring work complicated. be.

This idea was made with attention to the above circumstances, and its purpose is to create a load that operates load B for a certain period of time T after load A is turned off by switching one three-way switch. Provide operating equipment.

This invention will be described below in Figures 3 to 6, which are examples of this invention.
This will be explained based on the diagram. Reference numeral 1 denotes a detection circuit, which consists of a primary coil 2a of a current transformer 2. 3a,
3b is a terminal of this detection circuit 1. 5 is a main circuit, which includes a capacitor 7 that charges the voltage induced in the secondary coil 2b of the current transformer 2 by full-wave rectification by a diode bridge 6, a variable discharge resistor 8, and this capacitor. The thyristor 9 is turned on by the discharge current of 7, and the triax 10 is driven for a certain period of time T, which is the discharge time. 11a and 11b are terminals of this main circuit 5. A is a load in the form of a lighting fixture, and one end is connected to the terminal 3a of the detection circuit 1. B is a load as a ventilation fan, and one end is connected to terminal 1 of the main circuit 5.
Connected to 1a. Reference numeral 12 denotes a three-way switch, and a common terminal 12a is connected to load A and load B via a power source 13, and switches between the detection circuit 1 and the main circuit 5.

When used in a tray as shown in FIG. 6, the three-way switch 12 is first turned over to the terminal 3b side. Then, only the load A, which is a lighting fixture, is turned on. In this state, the secondary coil 2b of the current transformer 2
The capacitor 7 is also charged with the voltage induced by the voltage. At this time, the thyristor 9 is in an off state. Next, after using the toilet, connect the three-way switch 12 to terminal 1.
When reversed to the 1b side, the load A is turned off and the triax 10 is driven for a certain period of time T determined by the discharge time of the capacitor 7, and the load B becomes a ventilation fan. After that, load B can be automatically stopped. C is the main unit.

FIG. 7 shows another embodiment of this invention, in which the resistor 1
Series circuit 17 consisting of 4, 15 and FET 16
and a positive feedback circuit 19 of FET 16 consisting of Tr 18.
By providing a fixed time T that becomes a delay time
This is to prevent variations in the Then, when the thyristor 9 is off and the FET 16 is on, the sum of the resistance values of the resistors 14 and 15 is determined by the triax 1 through the FET 16 and the diode bridge 20.
The resistor 21 has a large resistance value to suppress the current flowing to the gate 10G of the triax 10 when the thyristor 9 is turned on.
A small resistance value is used so that the current flowing through the triac 10 is large enough to turn on the triac 10.

First, the three-way switch 12 is reversed to the terminal 3b side to turn on the load A, charging the capacitor 7, and then the three-way switch 12 is reversed to the terminal 11b side, the FET 16 is turned off and the thyristor 9 is turned on. Triac 10 is driven and load B is turned on. Then, the charge stored in the capacitor 7 starts discharging, the gate voltage of the FET 16 gradually approaches zero, and the drain current of the FET 16 gradually increases. In response to this increase in drain current, the voltage between the base and emitter of Tr18 increases and base current begins to flow. Then
The collector current of Tr18 flows, the gate voltage of FET16 approaches zero, the drain current of FET16 further increases, FET16 instantaneously becomes zero, FET16 is turned on, thyristor 9 is turned off, and triac 10 is turned on. Stops and load B is turned off. In this way, the timing at which the collector current of Tr18 starts to flow is determined by the resistor 15, so by selecting the resistance value of the resistor 15, it is possible to arbitrarily and stably determine the fixed time T that is the delay time. I can do it. Note that it is possible to employ arbitrary loads A and B.

As explained above, this device consists of a detection circuit 1 consisting of the primary coil 2a of the current transformer 2, and a triax 10 which charges the voltage induced in the secondary coil 2b of the current transformer 2 and is driven only during this discharge time. circuit 5, load A connected to detection circuit 1, and main circuit 5
A load B connected to the load B, a power supply 13 connected to the load A and the load B, and a common terminal 12a to the power supply 13.
As shown in FIG. 4, by switching one of the three-way switches 12, after the load A is turned off, a certain period of time T is established. For example, when using the toilet, connect the three-way switch 12 to terminal 1 after using the toilet.
A load operating device is obtained in which the load A, which is a lighting fixture, is turned off by reversing it to the 1b side, and then the load B, which is a ventilation fan, is operated for a certain period of time T, and the load B is automatically turned off.

[Brief explanation of drawings]

1 and 2 are time charts of a conventional example. Figs. 3 to 6 show an embodiment of this invention. Fig. 3 is a circuit diagram, Fig. 4 is a time chart,
Fig. 5 is a circuit diagram, Fig. 6 is a partially cutaway perspective view, and Fig. 7 is a circuit diagram showing another embodiment of the present invention. 1: detection circuit, 2: current transformer, 2a: primary coil, 2b: secondary coil, 3a, 3b: terminals, 5: main circuit, 6: diode bridge,
7: Capacitor, 8: Resistor, 9: Thyristor, 10: Triac, 11a, 11b...
Terminal, 12... three-way switch, 12a... common terminal, 13... power supply, 14, 15... resistors, 16...
...FET, 17...series circuit, 18...Tr, 19
……Positive feedback circuit, 20……Diode bridge,
21...resistance, A, B...load, C...main unit, T...fixed time.

Claims (1)

[Scope of utility model registration request] A detection circuit consisting of the primary coil of the current transformer, a main circuit consisting of a triac that charges the voltage induced in the secondary coil of the current transformer and operates only during this discharge period, a load A connected to the detection circuit, and the main circuit. A load operating device comprising a load B connected to the load A and the load B, a power source connected to the load A and the load B, and a three-way switch that connects a common terminal to the power source and switches between a detection circuit and a main circuit.