JPS6046344B2 - Ventilation fan linked to gas equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gas appliance interlocking ventilation fan that operates a gas appliance and an exchanger fan in conjunction with each other.

2. Description of the Related Art Generally, when gas appliances are used in a cooking room or the like, a ventilation fan is operated to exhaust combustion gas, oil smoke, etc., and it is preferable to operate this ventilation fan at the same time as the gas appliance is started.

For this reason, it has been considered to configure gas appliances and ventilation fans to work together, but some gas appliances have a normally open switch for starting, for example, ignition, and others have a normally closed switch. Some devices have switches, and if there are multiple switches depending on the number of burners or gas appliances, problems arise when connecting them to the interlocking circuit of the ventilation fan.

Examples of such disadvantages will be explained below with reference to FIGS. 1 and 2.

FIG. 1 shows an example in which a gas appliance having two normally open switches 109 and 110 is connected to an interlocking circuit 112. A relay coil 102 that controls opening and closing of a switch 103 and this relay coil 10
2 and a switching transistor 1 connected to the power supply.
13 and the base power supply of the transistor 113 via connection terminals 114 and 115, two normally open switches 109 and 110 of the gas appliance are provided between the relay coil 102 and the transistor 113, and the relay coil A selector switch 108 is provided at 102 to select between a current-carrying circuit through transistors 1 and 13 and a current-carrying circuit through normally open switches 109 and 110.

In addition, 101 in the figure is an AC power supply, 105 is a transistor,
106 is a diode 5 for obtaining a DC power source, 107 is a resistor of a rectifier circuit, and 111 is a bias resistor for a transistor 113.

Here, two normally open switches 109 in the gas equipment,
110 is a connection terminal 114, 11 in parallel relationship with each other.
5, and the selector switch 108 is switched to be energized via the normally open switches 109, 110 as shown in the figure, and the normally open switches 109, 1
When the gas appliance is started by closing both or one of the switches 10, an excitation current flows through the relay coil 102, the switch 103 is closed, and the fan motor 104 is operated.

Although not shown, if the starting switch in the gas appliance is a normally closed switch, the selector switch 108 is switched and connected to the transistor 113 side.

In this case, the base and emitter of the transistor 113 are short-circuited by the normally closed switch, the transistor 113 is turned off, the relay coil 108 does not work, and the switch 103 is turned off, so the fan motor 104 is not operated. When the normally closed switch of the gas appliance is opened and started, the transistor 113 turns on.
Relay coil 102 operates to close switch 103 and operate fan motor 104. Problems to be Solved by the Invention By the way, two normally closed switches in a gas appliance are connected in a parallel relationship as shown in FIG.
5 is inconvenient.

That is, if two normally closed switches are operated at the same time, the above operation can be performed, but even if only one normally closed switch is opened, the other is closed, so the base and emitter of transistor 113 will remain short-circuited, and the above-mentioned required operation will not be possible.

Therefore, it is not possible to connect two normally closed switches in the same way as in FIG. Therefore, when the starting switch for gas appliances is two normally closed switches, normally closed switches 128 and 12 are used as shown in FIG.
After connecting 9 in series, connect this series circuit to the connecting terminal 11.
4,115.

Therefore, two or more switches must be connected in series or in parallel depending on whether the switch is a normally closed type or a normally open type, which is a cumbersome task. In addition, if the connection terminals 114 and 115 are connected to the starting switches of gas appliances incorrectly, even if the starting switch of the gas appliance is operated, the ventilation fan's fan motor 10
4 is not operated. The present invention takes these problems into consideration, and even if the starting switches in gas appliances are normally closed or normally open, it is possible to do so without changing the connection of each switch on the gas appliance side. The object of the present invention is to provide a gas equipment interlocking ventilation fan that can be connected to a connection terminal of an interlocking circuit.

Means for Solving the Problems O To achieve the above object, the present invention provides a fan motor, a switch for controlling energization to the fan motor, a relay coil for controlling opening/closing of the switch, and a power supply for the relay coil and a power source. a switching transistor connected to the transistor; a gas equipment starting switch element connected between the base of the transistor and a power source to control on/off of the transistor; and a switching element inserted into the energizing circuit of the relay coil; a first selector switch for switching between energization through the transistor and energization of the relay coil through the switch element of the gas appliance, the switch element of the gas appliance having at least two normally open or normally closed switches; The ventilation fan is configured to be connected in series and in parallel by a second changeover switch that is connected to the first changeover switch.

Function: In this configuration, the ventilation fan connected to gas equipment has a transistor base in the energizing circuit of the relay coil. The transistors can be selectively switched in series and in parallel by a second selector switch linked to the first selector switch, i.e. in parallel for two normally open switches and in parallel for two normally closed switches. The transistor is switched in series with s so that the switching operation of the transistor can be performed normally, and when the transistor is released, it can be made to function normally as a switch for the relay coil's energizing circuit.

4 Embodiment An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

3 and 4, 1 is an AC power supply, 2 is a relay coil, 3 is a switch, 4 is a fan motor, 5 is a transformer, 6 is a diode, 7 is a resistor, 8 is a first changeover switch, and 11 is a bias resistor, 12 transistor, 1
3 is an interlocking circuit, 14 and 15 are connection terminals, which constitute a circuit similar to that shown in FIGS. 1 and 2 above, and
Since the operation is similar, the details will be omitted.

The characteristic configuration of this embodiment is the first changeover switch 8.
The second selector switch 14', 15'' is provided in conjunction with the second selector switch 14', 15''.

This second changeover switch 8a has two movable contact pieces 8a1 and 8a2, the movable contact piece 8a1 is connected to the connection terminal 14'', and the movable contact piece 8a2 is connected to the connection terminal 15''. In addition, fixed contacts A and b corresponding to the movable contact piece 8a1
and fixed contacts C and d corresponding to the movable contact piece 8a2, the fixed contact a (5c is short-circuited, the fixed contact b is connected to the connection terminal 14, and the fixed contact d is connected to the connection terminal 15. In Fig. 3, one normally open switch 9 in a gas appliance is connected to the connection terminals 14, 15'', and another normally open switch 10 is connected to the connection terminals 15, 14''. One normally closed switch 16 in the gas appliance is connected to the connection terminals 14 and 15'', and another normally closed switch 17 is connected to the connection terminals 15 and 14''.Here, as shown in FIG. The normally open switches 9 and 10 are connected to the connection terminals 14, 15'' and 15, 1'', and the first changeover switch 8 and the second changeover switch 8
When one or both of the normally open switches 9 and 10 of the gas appliance are closed while a is in the position shown in the figure, the relay coil 2 transfers the signal via the first changeover switch 8 and the second changeover switch 8a. An energizing circuit is formed, and when the relay coil 3 is energized, the switch 3 is closed and the fan motor 4 of the ventilation fan is operated.

That is, the fan motor 4 is linked to the starting of the gas appliance. Next, in the case of gas appliances having normally closed switches 16 and 17, one normally closed switch 16 is connected to the connecting terminals 14 and 15'' as shown in FIG.
Connect another normally closed switch 17 to .

Then, the first changeover switch 8 is switched to form a circuit for supplying current to the relay coil 2 through the transistor 12 as shown in the figure, and the normally closed switches 16 and 17 are made to function as control switches for the transistor 12. In this case, the two normally closed switches 16 and 17 are connected in series by the second changeover switch 8a, and when either or both of the normally closed switches 16 and 17 are opened, the transistor is turned on. Continuity is controlled, relay coil 2 works, switch 3 closes, and fan motor 4 of the ventilation fan starts operating. Effects of the Invention As is clear from the description of the embodiments described above, the present invention provides a method for controlling a switching transistor connected in series to a relay coil for controlling a fan motor, and a switching transistor connected in series to the relay coil for controlling energization by switching. In a device that uses a plurality of switches of gas equipment as functional switches, whether the plurality of switches of the gas equipment are normally open type or normally closed type, a second
The changeover switch allows the multiple switches to be connected in parallel or in series, so it can be connected to the ventilation interlock circuit without changing one connection on the gas equipment side, allowing the gas equipment and the ventilation fan to operate normally. It is possible, and its value is great.

[Brief explanation of the drawing]

FIGS. 1 and 2 are circuit diagrams of a conventional gas equipment-linked ventilation fan, and FIGS. 3 and 4 are circuit diagrams of a gas equipment-linked ventilation fan according to an embodiment of the present invention. 2...Relay coil, 3...Switch,
4...Fan motor, 8...First changeover switch, 8a5...Second changeover switch, 9,1
0... Normally open switch for gas appliances, 12...
...Transistor, 16,17... Normally closed switch for gas equipment.

Claims (1)

[Claims] 1 A fan motor, a switch that controls energization to the fan motor, a relay coil that controls opening and closing of the switch, a switching transistor connected to the relay coil and a power source, and a connection between the base of the transistor and the power source. It is connected to a gas appliance starting switch element that controls on/off of the transistor, and is inserted into the energizing circuit of the relay coil, and switches the energization through the transistor and the relay coil energizing circuit through the gas appliance switch element. a first changeover switch, the switch element of the gas appliance is composed of at least two normally open type or normally closed type switches, and a second changeover switch interlocked with the first changeover switch connects the switch element to the gas appliance in series. Ventilation fans connected to gas equipment configured to be switched and connected in parallel.