JP2003279051A - Portable gas burning device with automatic extinguishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable gas burning device automatically extinguishable when a predetermined time has passed after the start of burning while the mechanism remains relatively simple. <P>SOLUTION: The portable gas burning device equipped with an automatic extinguishing device is composed of: a burning starting means installed in a gas passage between a gas supplying source and a burning part, supplying the burning gas and shutting off, and putting the gas in the burning condition when it is supplied to a burner part; a thermoelectromotive force generating means installed near the burner part and generating the thermoelectromotive force with the heat of gas burning; a solenoid valve to keep the gas passage in the released condition upon receiving the thermoelectromotive force from the thermoelectromotive force generating means after the start of burning; a timer to set the maximum burning time; and a solenoid valve controlling means to shut off the supply of the thermoelectromotive force to the solenoid valve immediately after the elapse of the set time on the timer and transfer the solenoid valve to the closed condition. It is preferable that further an at- tumbling gas shutoff means is provided to shut the gas passage in the event of tumbling. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable combustor equipped with a removable gas cylinder, such as a portable gas stove or portable gas heater, and in particular, means for automatically extinguishing a fire after a lapse of a predetermined time. A portable gas combustion device with an automatic fire extinguisher.

[0002]

2. Description of the Related Art A portable gas stove is an inexpensive heating and cooking means having a lightweight and simple structure which is used under various usage environments. The portable gas heater is a temporary heating tool used for heating a bathroom, for example. Although these combustion appliances are widely used in various environments, it is strongly required to ensure safety due to their character, and in particular, ensure that they are extinguished after use and that no fire will occur. It is strongly required to

[0003] In general, a gas stove for city gas is known, which shuts off the gas flow passage by counting with a timer, but it is not suitable for an inexpensive portable gas stove because of its complicated mechanism. The gas stove also has a combustion control mechanism with a timer and a temperature control function as a set, but this is also not suitable for an inexpensive portable gas stove because the mechanism is complicated.

As a means for solving such a problem, for example, in Japanese Patent Laid-Open No. 9-296934, a dial type timer is provided as a timer fire extinguishing device in a portable gas stove, and a rotary shaft of the timer and a gas cylinder mounting means are provided. There has been proposed a portable gas stove that has a mechanical link mechanism and has means for automatically extinguishing a fire after a lapse of a predetermined time.

[0005]

However, in the above proposal, after the timer fire extinguisher is activated, the gas cylinder is detached from the portable gas stove. Therefore, when the gas stove is used again, the gas cylinder must be reloaded again. It has to be used, and there is an inconvenience to use. An object of the present invention is to solve the above problems in the prior art, and it is an object of the present invention to propose a portable gas combustion device that automatically extinguishes a fire after a lapse of a predetermined time after the start of combustion with a relatively simple mechanism. It is another object of the present invention to further improve the safety of the portable gas combustion device by adding a gas shut-off means for a fall to the portable gas combustion device with an automatic fire extinguisher. A further object of the present invention is to propose a portable gas combustion device which can further improve the safety of the combustion device and which can be used for continuous combustion as required.

[0006]

A portable gas combustion apparatus with an automatic fire extinguishing apparatus according to the present invention is installed in a gas passage between a gas supply source and a combustion section and controls the supply and interruption of combustion gas and the gas is burner section. Combustion starting means for placing the gas in a combustion state when supplied to the burner, a thermoelectromotive force generating means for generating a thermoelectromotive force by the combustion heat of the gas, which is arranged in the vicinity of the burner section, and the thermoelectromotive force after the start of combustion An electromagnetic valve that receives the thermoelectromotive force from the generating means and maintains the gas passage open.
It has a timer for setting the maximum combustion time, and an electromagnetic valve control means for shutting off the supply of thermoelectromotive force to the electromagnetic valve and shifting the electromagnetic valve to the closed state immediately after the set time of the timer has elapsed. In this case, it is preferable to additionally provide a gas shutoff means for shutting down which shuts off the gas flow passage at the time of fall.

In consideration of the fact that depending on the situation of use, combustion may be interrupted by the timer, so that a timer / continuous changeover switch capable of selecting the timer direct connection circuit or the timer bypass circuit is provided. .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the configuration of a portable gas heater with an automatic fire extinguisher according to the present invention.
Is a circuit diagram thereof, and FIG. 3 is an electric wiring diagram thereof.

As shown in FIG. 1, in a portable gas heater to which the present invention is applied, a removable gas cylinder 2 is attached to a main body 1 and a pressure regulator 3 (also referred to as a governor) is attached to the portable gas heater to which the present invention is applied. The fuel gas is connected and is fed to the burner unit 4 through the gas flow path. An ignition and fire extinguishing knob 5 is integrally provided in the gas flow path so that the electromagnetic valve unit 6 is integrally provided, and the gas passage can be arbitrarily opened and closed for ignition and extinction. As is well known, the ignition and extinguishing knob 5 is provided with a piezoelectric element so that ignition sparks can be generated by the ignition plug 7 on the burner unit 4 side by the ignition side operation.

In the present invention, a thermoelectromotive force generating means 8 (generally called a thermocouple), which is arranged in the vicinity of the burner unit 4 and generates thermoelectromotive force by the combustion heat of gas, is installed in the burner unit 4. The electromagnetic valve unit 4 is kept open by the thermoelectromotive force generated by the combustion heat of the gas.

In the present invention, the timer switch 10 is also installed so that the maximum allowable combustion time can be set. The input of the thermoelectromotive force to the electromagnetic valve unit 6 can be shut off by the operation thereof, that is, the lapse signal of the maximum allowable combustion time.

Therefore, when the timer switch 10 is first set for the combustion allowable time and the ignition and fire extinguishing knob 5 is operated to the ignition side in use, the electromagnetic valve unit 6 is set.
Is operated to the open side, the combustion gas adjusted to a predetermined secondary pressure is supplied from the gas cylinder 2 via the pressure regulator 3 to the burner unit 4, and at the same time, by the action of the piezoelectric element, the ignition plug 7 causes the burner unit 4 to move. Combustion begins. Further, the electromagnetic valve unit 6 is maintained in the open state by the thermoelectromotive force generated by the thermoelectromotive force generating means (thermocouple) 8 due to the combustion heat, and the combustion is continued.

However, when the predetermined allowable combustion time elapses, the timer switch 10 operates and the electric circuit is opened. As a result, the input of thermoelectromotive force is cut off, the solenoid valve built in the electromagnetic valve unit 6 operates to the closing side, the electromagnetic valve unit 6 operates to the closing side, and the gas supply is cut off, so that the combustion device It will be extinguished.

In the above, the timer switch 10 is
The form does not matter. It suffices that the required maximum combustion allowable time can be set and that a delay operation circuit that operates after the set time is provided so that the input of thermoelectromotive force to the electromagnetic valve unit 6 can be shut off. .

According to the present invention, the portable gas combustion apparatus can be put into a fire extinguishing state by operating the timer having the simple mechanism as described above. Also, when the so-called extinguishing occurs, the supply of thermoelectromotive force from the thermocouple 8 is cut off, so the solenoid valve automatically operates on the closing side, and the electromagnetic valve unit 6 operates on the closing side, and the gas is closed. Is cut off and the combustion device is extinguished.

However, even in the above apparatus, it is desirable to completely avoid the accident such as gas explosion by shutting off the gas supply when the heater falls. For this reason, in the present invention, as shown in FIG. 1, gas-shutdown means 11 for overturning is provided to shut off the gas passage when the burner falls over. The overturning gas cutoff means 11 may be provided with a vibrator attached to, for example, an oil fan heater, and detect the vibration to cut off the gas flow path. In this case, the means for cutting off the input of the thermoelectromotive force to the electromagnetic valve may be used as a means for shutting off the gas flow path,
Alternatively, a means of directly blocking the gas flow path by operating a valve may be used.

Further, depending on the situation of use, inconvenience may occur if the combustion is interrupted by the timer. Therefore, it can be used regardless of the timer, and is desirable in the sense that it can be used over a wide range without limiting the conventional range of use. Therefore, as shown in FIG. 4, a timer / continuous changeover switch 12 capable of selecting a timer direct connection circuit or a timer bypass circuit is provided in series with a circuit forming the electromagnetic valve 6 and the thermoelectromotive force generating means 8. . For normal use, set it to the timer direct connection circuit switch, and for continuous use, select the timer bypass circuit switch.

[0018]

According to the present invention, the operability of a portable gas combustion apparatus with an automatic fire extinguisher can be improved, and the safety and reliability of its use can be enhanced without limiting the conventional range of use.

[Brief description of drawings]

FIG. 1 is an overall structural diagram of an embodiment of a portable combustion device according to the present invention.

FIG. 2 is a circuit diagram of the above.

FIG. 3 is an electric wiring diagram of the above.

FIG. 4 is an electrical wiring diagram of another embodiment according to the present invention.

[Explanation of symbols]

1: Main body 2: Gas cylinder 3: Pressure regulator (also called governor) 4: Burner unit 5: Knob for ignition and fire extinguishing 6: Electromagnetic valve unit 7: Spark plug 8: Thermoelectromotive force generating means 10: Timer switch 11: Gas shutoff means at the time of fall 12: Timer / continuous switch

Claims (3)

[Claims] 1. An electromagnetic valve unit installed in a gas passage between a gas supply source and a burner unit for controlling the supply / cutoff of combustion gas, and a thermoelectromotive force which is arranged in the vicinity of the burner unit by the combustion heat of the gas. Having a thermoelectromotive force generating means and a timer for setting the maximum combustion time,
A portable gas combustion apparatus with an automatic fire extinguisher, wherein the electromagnetic valve unit is controlled to be opened and closed by the thermoelectromotive force generating means and the timer. 2. The portable gas combustion device with an automatic fire extinguisher according to claim 1, further comprising a gas shutoff means for shutting down the gas passage when the gas falls. 3. A timer / continuous changeover switch capable of selecting a timer direct connection circuit or a timer bypass circuit is provided in series with a circuit constituting the electromagnetic valve and the thermoelectromotive force generating means. 2. Portable gas combustion device with automatic fire extinguishing device.