JPH0227328Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a safety device for a combustor used in a gas stove or a gas water heater.

(b) Prior Art Safety devices using thermocouples require several seconds or more for the electromotive force to rise, and so-called instantaneous adsorption circuits that use battery power during this time are often used. On the other hand, there are publications such as Utility Model Application No. 56-10157 that use the above-mentioned battery in an igniter, but in this case, even if the ignition operation time is shortened with an instantaneous adsorption circuit, it is necessary to operate the igniter until the burner ignites. There is.

(c) Purpose of the invention The purpose of the invention is to shorten the ignition operation time in igniters that use batteries for instant adsorption.

(d) Structure of the invention The structure of the invention is to connect a solenoid valve coil in series to a thermocouple heated by a burner, connect a capacitor to this coil via a changeover switch, and connect the coil to this coil via a changeover switch. A battery is connected, the capacitor is charged by the battery before ignition operation, and when the ignition operation is performed, the capacitor and battery are disconnected and the capacitor is connected to the coil.In addition, an igniter is connected in parallel to the coil, and the igniter is operated to ignite. It is equipped with an ignition switch that is sometimes connected to a battery and then switched to a capacitor after ignition. By operating the igniter using the power from the capacitor, the ignition time can be shortened. Also, during ignition operation, the igniter is operated by the battery, which can compensate for insufficient charging of the capacitor.

(e) Embodiment An embodiment of the present invention will first be explained based on FIG.
A sub-outflow hole 6 connected to the pilot burner 7, a pilot outflow hole 8 connected to the pilot burner 7, and a main outflow hole 10 connected to the main burner 9 are provided respectively, and the lower part of the closure 2 is opened and closed by the valve body 12 of the solenoid valve 11. Passage 13
a solenoid valve chamber 14 that accommodates the solenoid valve 11 via the solenoid valve chamber 14;
are communicating.

Further, the peripheral wall 14' of the electromagnetic valve chamber 14 is provided with a gas inlet hole 15 connected to a gas source, and the closure 2 has a passage 13 connected to each outlet hole 6, 8, 10 at a predetermined rotational position described later. Communicating passages 16, 17, 1
8, and a pilot valve 19 is provided in the middle of the communication path 16.

The closure 2 is rotated by an operating shaft 20 connected to its upper portion, and the pilot valve 19 is opened and closed by pushing down the operating shaft 20.

A thermocouple 21 is disposed in the flame hole 7' of the pilot burner 7, and this thermocouple and solenoid valve 11 are connected to the second
Connect as shown in the figure. In other words, the operating shaft 20
A changeover switch 2 linked to a cam plate 22 attached to the
A large capacity capacitor 24 is connected to the movable contact 23' of No. 3, a battery 25 is connected to the normally closed contact 23'', and the normally open contact 23 is connected to the coil 11' of the electromagnetic valve 11 through a resistor 26. 21 parallel circuits are connected, and the normally open contact 23 is connected to the capacitor 24, and the normally closed contact 28'' of the ignition switch 28 is connected to the capacitor 24.
A well-known igniter 27 connected in parallel is connected via a movable contact 28'. The plug 27' of this igniter is provided in the flame hole of the auxiliary pilot burner 5, and the ignition switch 28 is linked to the depression operation of the operating shaft 27, and its normally open contact 28 is connected to the battery 25. is connected to.

Before the ignition operation by pushing and turning the operating shaft 20, the capacitor 24 is charged with the battery 25, and the passage 13 is opened by the ignition operation, and the communication passages 16, 1
At 7 and 18, the passage 13 is communicated with each outlet hole 6, 8, and 10 to supply gas to each burner 5, 7, and 9, and at the same time, the movable contact 23' of the changeover switch 23 is switched and connected to the normally open contact 23. together with the ignition switch 28
The movable contact 28' is switched and connected to the normally open contact 28 to discharge the capacitor 24 to the coil 11', momentarily hold the valve body 12 of the solenoid valve 11 in the open state, and simultaneously activate the igniter 27. Further, the plug 27' discharges electricity to ignite the auxiliary pilot burner 5, and the auxiliary pilot burner ignites and burns the pilot burner 7 and the main burner 9. Also, when the operating shaft 20 is released from the depression, the movable contact 2 of the ignition switch 28 is released.
8' is switched to the normally closed contact 28'', and the igniter 27 continues discharging at the capacitor 24. Thereby, the igniter 27 operates reliably even if the capacitor 24 is not fully charged.

(f) Effects of the invention With the configuration according to the invention described above, by operating the igniter with battery power at the start of the ignition operation, the capacitor is fully charged, for example during a re-ignition operation within a short period of time. Even if the igniter is not activated, the igniter can be operated reliably and the ignition performance can be improved.
By operating the igniter using a capacitor,
The igniter can be automatically operated for a predetermined period of time without providing a complicated timer circuit, and the burner ignition operation can be further simplified.

[Brief explanation of drawings]

Figure 1 is a schematic explanatory diagram of a combustor using the present invention;
FIG. 2 is also an electrical circuit diagram. 11... Solenoid valve, 11'... Coil, 21...
Thermocouple, 23...Switch, 24...Capacitor, 25...Battery, 27...Igniter, 28 Ignition...Switch.

Claims (1)

[Scope of utility model registration request] A solenoid valve coil is connected in series to a thermocouple heated by a burner, a capacitor is connected to this coil via a changeover switch, and a battery is connected to this capacitor via the above changeover switch. An ignition switch that connects the igniter to the coil in parallel with the battery and disconnects the battery and connects the capacitor to the coil, connects the igniter to the battery during the ignition operation, and switches the ignition switch to the capacitor after the ignition operation. A safety device for a combustor that is characterized by being equipped with.