JPS5938489B2 - Ventilation fan linked to gas appliances - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ventilation fan, particularly to a ventilation fan operated in conjunction with gas appliances.

In recent years, as houses have become more airtight, accidents such as gas poisoning, gas explosions, and oxygen deficiency in kitchens where many gas appliances are used are increasing.

These accidents can be prevented by operating the ventilation fan installed in the kitchen, but since ventilation fans are generally operated separately from gas appliances, it is recommended not to operate gas appliances without operating the ventilation fan. May be used.

To solve this drawback, ventilation fans that are connected to gas appliances have been developed.

This general ventilation fan linked to gas odor changes is shown in Figures 1 and 2.
2 is the main body of a ventilation fan with a hood that is attached to the top; 2 is a duct for exhausting air from the main body 1 to the outside; and 3 is a switch for operating the ventilation fan provided on the front of the main body 1.

4 is a gas range installed in parallel to the sink, and 1 is the main body of the ventilation fan.
It is located below.

5 is a ventilation fan blade which is directly connected to the motor 6VC.

A ventilation fan operation switch 3 is arranged between the power source and the motor 6, and is configured so that when the switch 3 is manually closed, the ventilation fan is operated, and when it is opened, the ventilation fan is stopped.

Reference numeral 7 denotes a gas passage opening/closing valve provided in the middle of piping 8 for supplying gas to gas range 4 .

The gas passage opening/closing valve 7 has one end of a lead wire connected between the switch 3 and the motor 6, and the other lead wire connected to a power source.
It consists of a solenoid valve that opens only when the ventilation fan operation switch 3 is closed.

With this configuration, the ventilation fan should be automatically operated by closing the switch 3, making it safer than the conventional system.

However, if the ventilation fan is connected to a power source, the ventilation fan will not exhaust or intake air unconditionally.

In other words, even if the switch 3 is closed, if the winding of the motor 6 is disconnected or the bearing is seized, or if the blade 5 does not rotate even if the motor 6 rotates normally, the blade 5 will not rotate further. If the shutter does not open even if the exhaust or intake is performed, the force ζ is insufficient or the exhaust or intake is not performed at all.

Therefore, the ventilation fan linked to the ventilation fan operation switch is also insufficient to prevent the above-mentioned accident.

The present invention has been made with attention to the above-mentioned points, and an object of the present invention is to provide a gas appliance-linked ventilation fan that can sufficiently prevent accidents in the kitchen.

An embodiment of the present invention will be described below based on FIGS. 3 and 4.

In this drawing, the same reference numerals as in FIGS. 1 and 2 indicate the same parts.

In FIG. 3, reference numeral 101 denotes a main body case constituting the main body 1, and an exhaust hole 102 is provided in the upper side surface of the main body case.

Reference numeral 9 denotes an exhaust joint pipe connected to the duct 2 in FIG. 1, which is fixed around the exhaust hole 102 by a known method such as welding or screwing.

Reference numeral 10 denotes a shutter shaft horizontally attached to the upper part of the exhaust joint pipe 9, on which a shaft plate 11 is rotatably attached.

This shutter plate 11 has a size that opens and closes almost all of the exhaust passage of the exhaust joint pipe 9, and is a wind pressure shutter that automatically opens according to the exhaust pressure flowing inside the exhaust joint pipe 9 when the ventilation fan is operated.

12 is a magnet attached to the lower end of the shirt shirt plate 11, and 13 is a ventilation detection element that changes internal electrical resistance by sensing magnetic force, or a reed switch that opens and closes using magnetic force.

14 is a lead wire drawn out from the ventilation detection element 13.

The electric circuit is constructed as shown in FIG.
One end of 3-1 is connected to the ventilation fan operating switch 3 and motor 6.
In between, the other end is connected to a control component of the gas passage opening/closing valve 7, such as a solenoid valve.

When the ventilation fan is stopped, that is, when the ventilation fan operation switch 3 and the ventilation detection switch 13-1 are open, or even if this switch 13 is closed, the inside of the exhaust joint pipe 9 may be damaged due to some accident. When pressurized air is not flowing, the ventilation detection switch 13-1 is open, and the passage opening/closing valve 1 is closed, so the gas appliance cannot be used.

In this state, when the ventilation fan operation switch 3 is manually closed, the blade 5 is rotated by the motor 6, and the air given speed and pressure by the blade 5 is delivered from the exhaust hole 102 to the exhaust joint pipe 9 to the side duct 2. is discharged.

At this time, the shirt flap plate 12, which opens due to wind pressure, opens as shown by the dotted line in FIG.

When the shutter 4 plate 12 moves, the magnet 12 moves away from the ventilation detection switch 13, so the ventilation detection switch 1
3 is closed.

Therefore, when the draft detection switch 13-1 is closed, the multi-passage on-off valve 7 is opened, and gas is supplied to the gas appliances 4, such as a gas range, a gas instantaneous water heater, etc., and these gas appliances 4 are used for the first time. become possible.

Gas appliances can be used by operating the ignition knob, etc. attached to the gas appliance.

At this time, normal exhaust is being carried out from the exhaust joint pipe 9 by operating the ventilation fan, so accidents such as oxygen deficiency will not occur.

Furthermore, even if the ventilation fan is stopped first, the use of only the gas appliance 4 can be prevented because the passage opening/closing valve 7 is closed.

FIGS. 5 and 6 show another embodiment, which is the same as the previous embodiment except for the configuration of the ventilation detection switch 13. FIG.

In this embodiment, a shield plate 17 is formed above the shirt shaft 10 of the shirt flap plate 11, a light emitting element 18 is provided on one side and a light receiving element 19 is provided on the other side so as to sandwich the shield plate 17, and ventilation is generated by an electric signal from the light receiving element 19. It opens and closes the detection switch 13-1.

When the ventilation fan is operated with this configuration, the shutter plate 11 rotates, so the ventilation detection switch 13-1 is closed, and the gas appliance 4 can be used in the same manner as described above.

Since the above two examples have the disadvantage of being electrically complicated,
A simpler example is shown in FIG.

In this example, the microswitch 20 is directly opened and closed at one end 25 of the shirt shirt plate 11.

In this figure, 22 is a box-shaped exhaust chamber in which the exhaust joint pipe 2 can be attached in any direction as shown by the broken line.
23 is a fan casing, and 24 is a partition plate.

FIG. 8 shows an electric circuit that allows the rotational speed of the blade 5 to be changed.

In this figure, reference numeral 3 denotes a speed adjustment switch, which is configured so that when either 3a or 3b is closed, a contact 3c is closed.

The ventilation detection switch of the above embodiment may be, for example, one that detects passage pressure, or one that detects temperature changes due to wind using a thermocouple.

As explained above, according to the present invention, gas appliances can only be used when the ventilation fan operating switch is closed and exhaust is being exhausted by the ventilation fan. Since operation of the appliance alone is prevented, accidents caused by the use of gas appliances can be prevented.

Note that the present invention naturally includes other configurations that can be considered without departing from the scope of the claims.

[Brief explanation of the drawing]

Fig. 1 is an installation state diagram of a ventilation fan and gas appliance to which the present invention is applied, Fig. 2 is an electrical circuit diagram of an improved ventilation fan linked to gas appliances, and Fig. 3 is a diagram showing the main part configuration of an embodiment of the present invention. FIG. 4 is a vertical sectional view, FIG. 4 is an electric circuit diagram thereof, FIG. 5 is a vertical m-plane view of the main part showing the first other embodiment, and FIG. 6 is a VI-VI sectional view thereof.
FIG. 7 is a schematic front view showing a second other embodiment, and FIG. 8 is an electric circuit diagram showing another example. 3...Switch for ventilation fan operation, 13...
・Ventil detection switch, 7... Passage opening/closing valve.

Claims (1)

[Scope of Claims] 1. A ventilation fan operating switch and a gas passage opening/closing valve provided in the middle of a gas pipe connected to a gas appliance are provided, and the passage opening/closing valve is opened only when the ventilation fan operation switch is closed. In the device configured to open the passage opening/closing valve, a ventilation detection switch is provided to detect ventilation due to operation of the ventilation fan, and the passage opening/closing valve is opened only when both the ventilation fan operation switch and the ventilation detection switch are closed. A ventilation fan linked to a gas appliance, characterized in that it is configured as follows. 2. A ventilation fan linked to a gas appliance as described in the patent, characterized in that the ventilation detection switch is configured to be linked to a shutter plate that opens and closes depending on the wind pressure when the ventilation fan is in operation.