JPS60242A - Ventilating fan cooperating with gas equipment - Google Patents

Abstract

PURPOSE:To improve the stability and safety of the operation of the fan by utilizing a triode AC switch for switching a fan motor for the ventilating fan. CONSTITUTION:A transformer 2, consisting of a core, a primary winding P1, secondary winding S1 and third winding S2 including a voltage by the short- circuit of the secondary winding, which are made of insulating wires and arranged in parallel around an iron core, and electric contact 5, for short-circuiting the secondary winding S1 and a two-way control rectifying element (referred to the triode AC switch hereinafter), connecting a rectifying diode 6 connected in reverse-parallel to the third winding S2 in series to a gate, are provided. The triode AC switch 7 is operated by the electric contact 5 to operate the fan motor connected to the switch 7. The circuit may be constituted in contactless by using the triode AC switch without using the opening and closing contact of a solenoid relay, therefore, generation of arc spark and danger of introduction of gas explosion may be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gas equipment interlocking ventilation fan for automatically interlocking and ventilating exhaust gas when the gas equipment is in use.

Conventional configurations and their problems In recent years, with the spread of gas appliances, cooking and hot water supply facilities have become extremely convenient. However, open-type gas appliances used indoors, such as gas water heaters, emit combustion gases generated during use into the room, resulting in oxygen deficiency accidents due to lack of ventilation. state. In order to correct this lack of ventilation, gas equipment-linked ventilation fans are used, which operate the ventilation fan in conjunction with the gas equipment when the equipment is in use.

A conventional gas equipment interlocking ventilation fan will be described below with reference to FIG.

In FIG. 1, 1oo is a power source, 101 is a transformer, and the secondary side is at a low voltage in order to connect the electrical contact 102 of the gas appliance to the secondary side. 103 is a diode for converting the secondary side of the transformer 101 into direct current, and is connected to a smoothing capacitor 104.

Reference numeral 105 is a DC electromagnetic relay that operates a fan motor 107f of a ventilation fan by opening/closing contacts 106.

The operation of the gas equipment interlocking ventilation fan configured as above will be described below.

First, when the gas appliance is used, the electric contact 102 operates, and the secondary side of the transformer 101 forms a current circuit, thereby operating the electromagnetic relay 106.

The fan motor 10 of the ventilation fan is operated by operating the opening/closing contact 106 of the electromagnetic relay 106, which is relatively convenient in that ventilation is automatically carried out.

However, even though there is no operational problem in opening and closing the fan motor 107 of the ventilation fan using the switching contacts 106 of the electromagnetic relay 105 as described above, arc sparks generated during opening and closing may cause a gas explosion in the event of a gas leak. This poses the risk of inducing

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a ventilation fan linked to gas appliances, which uses a non-contact switch system using a semiconductor, instead of the conventional one-way electromagnetic relay type with a contact switch system, and which has improved safety compared to the past. It provides:

Structure of the Invention In order to achieve this object, the gas equipment interlocking ventilation fan of the present invention uses a bidirectional control rectifying element (hereinafter referred to as TRIAC) for switching the fan motor, and by making it non-contact, there is no arc during switching. This is to prevent the generation of sparks.

DESCRIPTION OF EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 2 to 4.

In Figures 2 to 4, 1 is a power source, 2 is a transformer with secondary and tertiary windings, and as shown in Figure 3, the primary winding (Pl
), a secondary winding (Sl), and a tertiary si (S2). As shown in 3.4, the voltage waveform of the transformer 2 is such that a voltage is induced in the tertiary winding S2 by short-circuiting the secondary winding S1f and flowing current.

Reference numeral 5 denotes an electrical contact point of the gas appliance, which is connected to the secondary winding S1 of the transformer 2 and short-circuits the secondary winding 81 when the gas appliance is used.

A rectifier diode 6 is connected to the tertiary winding S2 of the transformer 2, and is connected antiparallel to the gate of the triac 7. 8 is a resistor connected to the gate of the triac 7. 9 is a fan motor of a ventilation fan; 10 is a part of the control unit of the present invention built into the ventilation fan; a signal line 12 connected to gas equipment 11 constitutes a system.

The operation of the gas equipment interlocking ventilation fan configured as described above will be described below.

First, when the gas appliance 11 is used, the electrical contact 5 operates to short-circuit the secondary winding Sl of the transformer.

If the secondary winding 81 is short-circuited, 3
A voltage is induced in the secondary winding S2, and current flows through the rectifier diode 6 to the gate of the triac 7 connected to the tertiary winding S2, causing the triac 7 to operate. Therefore, the fan motor 9 of the ventilation fan operates, and the ventilation fan can be automatically operated in accordance with the use of the gas appliance 11.

As described above, the present invention uses the triac 7 instead of the switching contacts of the electromagnetic relay, making it contactless, eliminating the generation of arc sparks and eliminating the risk of inducing a gas explosion. It is.

Effects of the Invention As described above, by using a triac for switching the fan motor of a ventilation fan, the present invention can stabilize the operation and prevent the induction of gas explosions, and the effectiveness of the ventilation fan in conjunction with gas equipment is greatly increased. There is.

[Brief explanation of the drawing]

Figure 1 is an electric circuit diagram of a conventional ventilation fan linked to gas equipment, Figure 2
The figure is an electric circuit diagram of a ventilation fan linked to gas equipment according to an embodiment of the present invention, Figure 3 is a side view of the transformer, and Figures 4a and b are transformers that form the switching operation of the ventilation fan linked to gas equipment of the present invention. FIG. 6 is a diagram showing the configuration of the ventilation system of the ventilation fan linked to gas equipment according to the present invention. 2...Transformer, P...Primary winding, S
l...Secondary winding, S2...Tertiary winding,
6... Electric contact, 6... Rectifier diode, 7... Triac, 9... Fan motor.

Claims (1)

[Claims] A primary winding in which three insulated windings are arranged on one iron core. A transformer consists of a secondary winding, a tertiary winding that induces voltage when the secondary winding is shorted, an electrical contact for shorting the secondary winding, and a reverse winding for the tertiary winding. and a bidirectional control rectifier element in which rectifier diodes connected in parallel are connected to a gate in series, a triac is operated by operation of an electric contact connected to the secondary winding, and a fan motor connected to the triac. Ventilation fan linked to gas equipment.