JPS6046343B2 - Ventilation fan interlocking device - Google Patents

Description

Detailed Description of the Invention The present invention relates to a ventilation fan interlocking device for interlocking a gas appliance and a ventilation fan, and when the ventilation fan has an air volume selector switch and a light switch, when the gas appliance is used, the ventilation fan is The purpose is to warn of insufficient ventilation by sounding an alarm buzzer if the system is not operated at maximum air volume.

Conventionally, as shown in Fig. 1, a switch 100 with a built-in gas equipment
By operating the transformer relay 101 and opening and closing the contacts 102, the power source 103 is turned on and off to the output outlet 104.

When the ventilation fan power plug 105 is inserted into the output outlet 104 and one of the lighting switch 106, low operation switch 107, and strong operation switch 108 is turned on when using the ventilation fan, the current from the ventilation fan flows through the current detection diode 109. , a minute voltage corresponding to the voltage drop is generated across both ends, the transistor 110 operates, and the thyristor 111
Since no gate current flows through the gate, the alarm buzzer 112 does not sound. When using gas appliances, if the ventilation fan is running at low speed or the lights are only turned on, combustion gas cannot be effectively exhausted. At this time, the alarm buzzer does not sound because current is flowing, which is a disadvantage in terms of safety. The present invention solves the above-mentioned conventional drawbacks, and an embodiment thereof will be described below based on FIG. 2.

In the figure, 1 is a switch that opens when the gas appliance is used, and is connected to the secondary side of a transformer relay 2. The primary side of the transformer relay 2 is connected to a power source 3, and the secondary side is always short-circuited when the gas appliance is not in use, so the contacts 4 are open. Reference numeral 5 denotes an output outlet through which the power supply 3 is opened and closed by a contact 4, and 6 an alarm buzzer, which is connected in parallel to the power supply 3 through the anode of the thyristor 7.

8 is a gate resistor of the thyristor 7, and 9 is a voltage dividing resistor, which is connected to the collector of the transistor 10 and the rectifying diode 11.

12 is a base resistance of the transistor 10.

13 is the power plug for the ventilation fan, 14 is the switch for the lighting equipment 15, 16 is the low operation switch for the fan motor 17, 1
8 is a strong operation switch for the fan motor 17; 19 is a current detection diode connected between the strong operation switch 18 and the strong operation terminal of the fan motor; both terminals are connected to the emitter and base resistor 12 of the transistor 10; .

In the above configuration, when the gas appliance is not in use, switch 1 is closed, so the secondary side of transformer relay 2 is short-circuited, current flows, and the relay part operates.
The contact 4 remains open and the power 3 is not output to the output outlet 5.

When the gas appliance is used, the switch 1 is opened and the secondary side of the transformer relay 2 is opened, so the contact 4 is closed and the power source 3 is outputted to the output outlet 5.

Connect the power plug 13 of the ventilation fan to the output outlet 5,
The ventilation fan is in the operating state, but if the light switch 14 and the low operation switch 16 are turned on, or if neither switch is turned on, the current detection diode 1
Since no current flows through transistor 9, no voltage is generated across it, and no current flows through the base of transistor 10.
0 does not work.

Therefore, current flows through the rectifier diode 11, the voltage dividing resistor 9, and the gate resistor 8, and the current also flows through the gate of the thyristor 7, causing the thyristor 7 to operate and the alarm buzzer 6 to sound.
It warns gas appliance users of insufficient ventilation. The alarm buzzer 6 sounds when a gas appliance is used and the ventilation fan switch is set to a position other than the strong operation position.

To stop the alarm buzzer 6 from sounding, press the strong operation switch 1.
This is not possible unless you include 8. Strong operation switch 18
When the current detecting diode 19 is turned on, a current flows through the current detection diode 19, a voltage is generated between both ends, a current flows through the base of the transistor 10, the transistor 10 operates, no current flows through the gate of the thyristor 7, and the alarm buzzer 6 stops. . In this way, according to the present invention, when gas appliances and ventilation fans are used in conjunction with each other, if there are many selector switches for the ventilation fans, combustion gas from the gas appliances can be effectively discharged by interlocking them only when the air volume is at maximum. However, in other cases, safety can be improved by warning the user of insufficient ventilation with an alarm buzzer, and it can be effective in preventing accidents such as oxygen deficiency when using gas appliances.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of a conventional ventilation fan interlocking device, and FIG. 2 is an electric circuit diagram of a ventilation fan interlocking device of the present invention. 2...Transformer relay, 3...Power supply,
4...Contact, 5...Output outlet,
6... Alarm buzzer, 7... Thyristor,
10...transistor, 11...diode.

Claims (1)

[Claims] 1. A transformer relay with a gas appliance switch connected to the secondary winding and a power source connected to the primary winding, and an output outlet provided in the ventilation fan operating electric circuit with a contact that operates in conjunction with the gas appliance switch connected in series to the power source. an alarm circuit connected in parallel to the ventilation fan operating electric circuit having an alarm buzzer detected and activated by a transistor; a current detection diode connected between the emitter and the base of the transistor of this alarm circuit; a ventilation fan strong operation switch connected to both ends of the ventilation fan diode and provided via the output outlet, a ventilation fan weak operation switch connected in series with the output outlet, and a lighting connected in parallel to the weak operation switch. A ventilation fan interlocking device that has an appliance switch and that sounds an alarm buzzer when electricity is turned on other than in strong operation.