JPS5842762Y2 - Ventilation fan interlocking device - Google Patents

Description

[Detailed description of the invention] This invention relates to a ventilation fan interlocking device for gas appliances.
By sensing the main combustion and short-circuiting the secondary coil, the relay contacts are opened and closed, and the ventilation fan is automatically operated.
A detector for detecting the supply of electricity to the ventilation fan is installed using the tertiary coil as a power source, a combustion safety device is configured to cut off the gas supply to the gas appliance when the electricity is cut off, and a rotation stop detector is installed in the air passage of the ventilation fan. By providing this, the gas supply to gas appliances is cut off during power outages and when the ventilation fan does not rotate.

Conventionally, a transformer relay was used to automatically operate the ventilation fan, but recently a detector has been devised to detect the energization of the ventilation fan and cut off the gas supply when the ventilation fan is not energized due to a power outage. It is not possible to detect whether current is flowing through the ventilation fan depending on whether power is applied to the ventilation fan.

Furthermore, if the ventilation fan does not rotate even when current flows through it, the original purpose of the ventilation fan is lost and gas appliances can be used as is, which is extremely unsafe.

Therefore, in this invention, a rotation stop detector is installed in the ventilation path of the ventilation fan to cut off the gas supply to the gas appliance when rotation is not detected, and a tertiary coil is installed in the transformer relay to obtain low voltage power. The aim is to provide something inexpensive.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In FIG. 1, 1 has a commercial power source, 2 has a primary coil 3, a secondary coil 4 and a tertiary coil 5 whose voltage has been stepped down to a low voltage, and by short-circuiting the secondary coil 4, the secondary coil 4 The relay contact 6 is configured to open and close, and the tertiary coil 5 is configured to provide a low voltage power source.

A ventilation fan 7 is connected via the relay contact 6.

The secondary coil 4 of the transformer relay 2 is connected in parallel with an element 8 for detecting non-combustion of a gas appliance (for example, a gas pressure responsive switch, a water pressure responsive switch, an exhaust heat responsive switch, etc.) and a manual switch 9.

Further, a detector 11 and a pilot lamp 14 are connected to the tertiary coil 5 via an interlocking switch 10.

The low voltage power source of the tertiary coil 5 is applied to the coil 12 of the detector 11, and the coil 12 is turned on when energized.

The contact 13 of the detector 11 is connected to the thermocouple 1 installed in the gas appliance.
6 and a safety valve 17 for opening and closing a gas passage.

Further, a rotation stop detector 18 is provided in the air passage of the ventilation fan 7, which is composed of a switch part (reed switch, etc.) 21, a temperature-sensitive magnetic material (thermo ferrite, etc.) 20 using Curie temperature, and a heater 19.

The heater 19 of the rotation stop detector 18 is connected in parallel with the ventilation fan 7, and the switch section 21 is connected to the transformer relay 2.
Provided in the circuit of the detector 11 provided in the tertiary coil 5 of
When the rotation stop detector 18 detects that the ventilation fan 7 has stopped,
It is provided so as to cut off the power supply to the detector 11.

FIG. 2 shows details of the rotation stop detector 18.

19 is a heater; 20 is a temperature-sensitive magnetic material (thermo ferrite) using Curie temperature; 21 is a switch section (reed switch).

To explain the operation, when the commercial power supply 1 is applied and the interlocking switch 10 is turned on, the coil 12 of the detector 11 is energized, and at the same time when the contact 13 is turned on, the pilot lamp 14 is turned on.
lights up and displays the linked display.

Next, by igniting the gas appliance, the flame is ignited, causing the thermocouple 16 to generate a starting force, which attracts and holds the safety valve 17 provided in the gas passage, thereby opening the gas passage.

Thereafter, by starting main gas combustion, the detection element 8 for non-combustion is turned on, and the secondary coil 4 of the transformer relay 2 is short-circuited.

By short-circuiting, the relay contact 6 is turned on, and the ventilation fan 7 is energized and starts operating.

Further, when the main combustion is extinguished, the main combustion detection element 8 is turned off and the ventilation fan 7 is stopped.

Further, by turning on the manual switch 9, the ventilation fan 7 can be operated arbitrarily regardless of whether the gas appliance is used.

Next, when the ventilation fan 7 is rotating, main combustion is sensed and the ventilation fan 7 is energized, and at the same time, the heater 19 is energized and heated, as shown in FIG.

However, when the ventilation fan 7 rotates, the heat generation of the heater 19 is suppressed, and the temperature of the temperature-sensitive magnetic body 20 is not reached, and the switch section (reed switch) 21 remains on due to its magnetism.

Therefore, the power supply to the detector 11 is maintained.

However, as shown in FIG. 3, when the ventilation fan 7 does not rotate even when the ventilation fan 7 is energized, the heater 19 is energized and when the temperature of the temperature-sensitive magnetic material 20 reaches the Curie temperature, the magnetism disappears and the switch section 21 is turned off from the on state.

When the switch unit 21 is turned off, the power to the detector 11 is cut off, and the gas supply is cut off.

Therefore, when the ventilation fan 7 does not rotate, there is a delay time after the heater 19 is energized until the temperature of the temperature-sensitive magnetic body 20 reaches the Curie temperature.

As described above, according to this embodiment, the following excellent effects can be expected.

(1) The ventilation fan can be operated automatically in conjunction with the main combustion of an open-type gas appliance, and the gas supply to the gas appliance can be cut off when the electricity to the ventilation fan is cut off due to a power outage or the like.

(2) By providing the rotation stop detector 21 in the air passage of the ventilation fan, it is possible to cut off the gas supply to the gas appliance.

(3) The detectors 12 and 21 can be interlocked to shut off the gas based on the detection results of the detector 12 and the rotation stop detector 21 and to activate an alarm powered by a dry cell battery.

(4) By using a transformer relay with a tertiary coil, a separate transformer is not required and the cost is reduced.

(5) A shutoff function can be added without affecting the adsorption/removal characteristics of the thermocouple 16 and safety valve 17.

As described above, according to the present invention, since there is no need to use a separate transformer, the entire device can be made compact, and it does not take up unnecessary space even when installed in a narrow place such as a kitchen.

Additionally, the system is designed to cut off the gas supply even if the ventilation fan is unexpectedly cut off due to an accident or power outage, making it extremely safe and always operating on the safe side.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, and Fig. 2 is a configuration diagram of a rotation stop detector, which shows when the ventilation fan is rotating.
FIG. 3 is a configuration diagram showing when the ventilation fan does not rotate. 2... Transformer relay, 7... Ventilation fan, 8... Combustion detection element, 9... Manual switch, 10... Interlocking Switch for 11・
...Detector, 16...Thermocouple, 17...
... Safety valve, 18 ... Rotation stop detector, 1
9...Heater, 20...Temperature-sensitive magnetic material,
21...Switch section.

Claims (1)

[Scope of utility model registration request] It has a transformer relay consisting of a primary coil, a secondary coil, a tertiary coil, and a relay contact, both ends of the primary coil of the transformer relay are connected to a commercial power supply, and both ends of the secondary coil are connected to a combustion detection element of a gas appliance. It is connected to a manual switch, and a relay contact of the transformer relay and a ventilation fan are connected in series between both ends of the commercial power supply, and a switch part, a temperature-sensitive magnetic material using Curi-temperature, and a heater are installed in the ventilation passage of the ventilation fan. A rotation stop detector is provided, the heater part of the rotation stop detector is connected in parallel with the ventilation fan, and an interlocking switch and a switch of the rotation stop detector are provided at both ends of the tertiary coil of the transformer relay. A detector is connected in series to detect when the power supply to the ventilation fan is unexpectedly cut off, and a contact point of the detector is connected to a safety device consisting of a thermocouple and a safety valve of the gas appliance. A ventilation fan interlocking device configured to cut off the gas supply to the gas appliance when the power to the appliance is cut off.