JPS589076Y2 - Ventilation fan interlocking device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ventilation fan interlocking device for gas appliances, which opens and closes relay contacts by sensing main combustion and short-circuiting the secondary coil, thereby automatically operating the ventilation fan.
By installing a tertiary coil as a power source that detects electricity to the ventilation fan, and configuring a combustion safety device that cuts off the gas supply to gas appliances when electricity is cut off, it is possible to cut off the gas in the event of a power outage, and also to prevent gas from flowing to gas appliances. Control is performed by supplying low voltage to prevent the risk of electric shock.

Conventionally, in devices that open and close ventilation fans using transformer relays, a detector that detects the energization of the ventilation fan is installed in the 1oov power supply, and when the energization of the ventilation fan is cut off, the gas supply is cut off by the operation of the detector. Although it has been devised recently, since the contact point of the detector is provided in the combustion safety device circuit, it is difficult to maintain a large distance between the detector and the combustion safety device, and if the detector is built into a gas appliance, there is a risk of electric shock due to the 1oov. there were.

In order to eliminate the risk of electric shock, this invention does not provide a low voltage transformer separately from the transformer relay, but instead configures a transformer relay that can obtain low voltage integrally with the transformer relay, making it possible to incorporate a detector into gas appliances. This is what I am trying to do.

The present invention will be explained below based on examples and drawings.

In the figure, 1 has a commercial power supply, 2 has a primary coil 3, a secondary coil 4 for step-down voltage, and a tertiary coil 5. By short-circuiting the secondary coil 4, the magnetic circuit of the secondary coil 4 can be changed. The relay contacts 6 are configured to open and close, and the tertiary coil 5 is a transformer relay configured to obtain 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 a mailer combustion detection element 8 of a gas appliance (for example, a gas pressure responsive switch, a horizontal 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 contact 13, which turns on when energized, is connected to a combustion sensor consisting of a thermocouple 16 installed in the gas appliance and a safety valve 17 that opens and closes the gas passage. Connect in series to safety device.

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 1 is turned on.
4 lights up and displays the linked display.

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

Thereafter, by starting the main gas combustion, the main combustion detection element 8 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 I 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.

However, here, the interlocking switch 10 and the manual switch 9
and can be turned on at the same time.

Next, when the power to the ventilation fan 7 is cut off due to a power outage, etc., the power to the detector 11 is also cut off at the same time, so the contact 13 turns on.
The combustion safety circuit of the thermocouple 16 and safety valve 17 is opened, cutting off the gas supply.

As described above, according to the present invention, ■ it is possible to automatically operate the ventilation fan in conjunction with the main combustion of an open gas appliance, and ■ it is possible to cut off the gas supply to the gas appliance when the electricity to the ventilation fan is cut off due to a power outage, etc. ■ By using a transformer relay with a tertiary coil, a separate transformer is not required and the cost is reduced.■ Since the power supply for the detector is low voltage, the detector can be built into the gas appliance and the transformer relay can be used. It is expected to have excellent effects, such as being able to separate the gas appliance from the gas appliance, allowing remote control operation, and eliminating the risk of electric shock from the appliance.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of the present invention. 2... Transformer relay, 7... Ventilation fan, 8... Combustion detection element, 9... Manual switch, 10... Interlocking Switch for 11・
...Detector, 16...Thermocouple, 17...
····safety valve.

Claims (1)

[Scope of utility model registration request] It has a primary coil that is connected to a commercial power supply, and a secondary coil and a tertiary coil that are stepped down to a low voltage. By shorting the secondary coil, the relay contact, which is made up of the magnetic circuit of the secondary coil, opens and closes. The tertiary coil is a transformer relay configured to obtain a low-voltage power source, a ventilation fan is connected through the relay contact, and a combustion detection element of the gas appliance and a manual switch are connected to the secondary coil. A detector is connected to the tertiary coil to detect when power to the ventilation fan, which operates using the tertiary coil as a power supply, is unexpectedly cut off, and the gas appliance is activated based on the detection result of the detector. A ventilation fan interlocking device that is equipped with a combustion safety device consisting of a thermocouple and a safety valve to cut off the gas supply.