JP3210034B2 - Heat source ignition element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat source ignition element which is disposed close to a heat source which heats an object to be heated by burning itself, and which is used for igniting the heat source. And an enclosure for the combustion caused by the firing operation of the ignition member provided in the enclosure due to the discharge operation between the pair of discharge electrodes disposed at both ends of the enclosure and the destruction of the enclosure due to the combustion. The present invention relates to a heat source ignition element which is realized by using outside supply, is small, inexpensive, and excellent in moisture resistance and ignition stability.

[0002]

2. Description of the Related Art Conventionally, in the field of a so-called container with a heating device provided with a heat source for heating and cooking a heating object such as sake, instant noodles, curry, coffee, etc. First, a self-burning type heating agent that heats the above-mentioned heating target by burning itself is well known and is useful because of its high energy density. On the other hand, the method of igniting the self-burning exothermic agent as described above is also disclosed in the above-mentioned publication, for example, an electric heater connected to the exothermic agent, a squib, and the like. Alternatively, a method of heating the exothermic agent for a while with a lighter or the like is well-known,
Regarding the ignition operation itself, an igniter or a heat source ignition element, such as a battery, a match, a metal that generates a spark by friction, or a piezoelectric element that generates a spark, is required.

[0003]

However, the above-described method using an electric heater requires a structure for keeping the electric heater in an operating state for a certain period of time because the amount of heat generated by the electric heater itself is not so large. It had disadvantages such as a complicated ignition structure, an increase in the size of the device, and an increase in cost.

In the method using a squib, as described above, it is necessary to prepare a squib, for example, which is a match, and the squib itself is easily affected by humidity. There is an inconvenience that the preparation is forgotten or the heating agent as a heat source cannot be easily ignited depending on the environment of the ignition place.

Further, in the method using a lighter, the state of the spark generated by the friction of the metal greatly varies depending on the above-mentioned state of friction, and it is necessary to perform several frictional operations to ignite the exothermic agent which is a heat source. Had disadvantages.

[0006] The method of using spark by a piezoelectric element also has a disadvantage that the piezoelectric element itself is susceptible to humidity and temperature shocks, and malfunctions due to the shocks, or a drop in output due to idling. Was.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described disadvantages, and has as its object to provide a low-cost, small-sized, and lightweight heat source ignition element having excellent moisture resistance and temperature resistance.

[0008]

A heat source ignition element according to the present invention is provided on a pair of discharge electrodes which are hermetically sealed to opposite ends of an envelope and one of the pair of discharge electrodes. An ignition member having a high ignitability and an enclosed gas which is enclosed in the envelope and promotes the ignition operation of the ignition member at the time of discharging between the pair of discharge electrodes.

[0009]

Since the heat source ignition element according to the present invention is configured as described above, when a discharge operation is performed between the discharge electrodes,
The ignition member instantly ignites and burns, and the envelope is thermally destroyed by the rapid heat generated by the combustion.

[0010] When the envelope is thermally destroyed, abrupt heat generated by the combustion of the ignition member is supplied to the outside of the envelope, and therefore, the book including the envelope in close proximity to the heat source. By arranging the heat source ignition element according to the present invention, the ignition of the heat source can be reliably realized at the time of thermal destruction of the envelope.

[0011]

FIG. 1 is a front view showing the structure of an embodiment of a heat source ignition element according to the present invention.

At both ends of the envelope 1, a pair of discharge electrodes 2,
3 are hermetically sealed to face each other. In addition, as the envelope 1, a glass bulb made of soda glass or lead glass that easily undergoes thermal destruction by rapid heat application is preferable.

One of the pair of discharge electrodes 2 and 3 has one discharge electrode 2
Is a single metal such as copper, nickel, iron, manganese, or a plurality of alloys, and has an encapsulation metal 4 having a coefficient of thermal expansion substantially equal to the coefficient of thermal expansion of lead glass or the like constituting the envelope 1 described above; The tip of the encapsulating metal 4 is made up of a tungsten wire 5 shaped like a needle, the tip of which is fixed by welding, for example.

The other discharge electrode 3 is made of copper, nickel, iron,
Consisting of a single metal such as manganese, or multiple alloys,
The envelope 1 is made of an encapsulating metal 4 having a coefficient of thermal expansion substantially equal to the coefficient of thermal expansion of lead glass or the like constituting the envelope 1.

A plate-shaped holding portion 6 is formed at the tip of the discharge electrode 3 by forming a part of the discharge electrode 3 or attaching an independent flat metal plate by welding. The part 6 is provided with a highly ignitable ignition member 7 that is easily ignited by the discharge operation between the pair of discharge electrodes 2 and 3. The ignition member 7 is formed of a metal mixture such as zirconium, potassium perchlorate, and phosphorus.

A gas mixture of nitrogen and oxygen or a single gas of oxygen is sealed in the envelope 1 as a sealing gas 8 for promoting the ignition of the ignition member 7 described above.

The configuration of the embodiment of the heat source ignition element according to the present invention has been described above. However, basically, it has a well-known discharge tube structure, and its structure is simple and its shape can be reduced in size. it is obvious.

Now, in the heat source ignition element according to the present invention having the above-described structure, a power source not shown in FIG. When a voltage that enables discharge is applied, a discharge operation occurs between the pair of discharge electrodes 2 and 3.

When a discharge operation occurs between the pair of discharge electrodes 2, 3, the ignition member 7 having high ignitability instantaneously ignites and burns to generate a high temperature, and supplies it to the envelope 1.

The envelope 1 is thermally destroyed by receiving the high temperature generated by the ignition member 7, that is, by rapid application of heat. As a result, the high temperature continues to flow out of the envelope 1. Will be supplied.

Therefore, if any heat source that emits a high temperature by burning itself is disposed in the vicinity of the envelope 1, the heat source is activated by the ignition member 7 when the envelope 1 is thermally destroyed. , And is easily and reliably ignited.

Here, the ignition operation will be described.
It is realized through an operation that easily manages the operation timing of the discharge between the pair of discharge electrodes 2 and 3 in the heat source ignition element, and it is clear that the stability of the operation is enhanced.

Also, the ignition configuration is basically formed by a miniaturized heat source ignition element, a power source, and a control means for controlling the timing of supplying the power source to the heat source ignition element, thereby simplifying and simplifying the operation. Obviously, it can be downsized.

Finally, a specific example of a use state of the heat source ignition element according to the present invention having the above-described configuration will be briefly described.

FIG. 2 is an electric circuit diagram showing a specific use example of the heat source ignition element T according to the present invention. In the figure, elements having the same reference numerals as those in FIG. 1 indicate the same functional elements.

The heat source ignition element T according to the present invention is connected to both ends of a power supply 9 capable of performing a discharge operation between the pair of discharge electrodes 2 and 3 via a starting means 10 and an operation control means 11. I have.

The heat source 12 is arranged close to the heat source ignition element T according to the present invention. The activation unit 10 is a unit for determining when to ignite the heat source 12, operates when ignition is necessary, and supplies the power source 9 to the heat source ignition element T in cooperation with the operation control unit 11 described later. Is made possible.

The operation control means 11 is a means for detecting whether or not the ignition condition for the heat source 12 is satisfied. Supply will be possible.
For example, in the field of containers with a heating device described at the beginning, whether or not food is ready to be cooked or cooked, specifically, water is present in the container in an amount required for cooking. It is detected whether or not the power supply 9 is present. If the power supply 9 is present, the supply of the power supply 9 is enabled according to the operation of the activation means 10. Means that operates to

With the above-described configuration, for example, when the heat source 12 is to be ignited, the starting means 10 is operated. If the detection result by the operation control means 11 satisfies the ignition condition, the power supply 9 is activated. Is applied to the heat source ignition element T via both the means 10 and 11.

Therefore, the heat source ignition element T discharges between the pair of discharge electrodes 2 and 3, and as described above, the ignition member 7 is ignited and burns by the above-described discharge operation to generate a high temperature. Will do.

When the ignition member 7 generates a high temperature, the envelope 1 is thermally destroyed as described above, so that the high temperature is supplied to the heat source 12 disposed close to the envelope 1. As a result, the ignition operation to the heat source 12 is performed.

[0032]

The heat source ignition element according to the present invention has a structure in which the ignition member for igniting the heat source is sealed in the glass bulb until the time of ignition. It has an effect that is not affected by environmental conditions such as.

Further, since the ignition and combustion of the ignition member are performed through a discharge operation in which the operation timing can be easily controlled, high heat generated by the ignition member can be supplied to the heat source at a desired time. Has an effect that the ignition operation can be surely and stably realized.

Further, the heat source ignition element according to the present invention basically has a well-known discharge tube structure, and its structure is simple, and can be miniaturized and mass-produced. Since the material can be used, there is also an effect that it can be manufactured at an extremely low price.

[Brief description of the drawings]

FIG. 1 is a front view showing the structure of an embodiment of a heat source ignition element according to the present invention.

FIG. 2 is an electric circuit diagram showing a specific usage example of the heat source ignition element according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Enclosure 2 Discharge electrode 3 Discharge electrode 4 Enclosed metal 5 Tungsten wire 6 Holder 7 Firing member 8 Enclosed gas 9 Power supply 10 Startup means 11 Operation control means 12 Heat source

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23Q 3/00 F23Q 13/00

Claims (5)

(57) [Claims] 1. A pair of discharge electrodes hermetically sealed to opposite ends of an envelope, a highly ignitable ignition member provided on one of the pair of discharge electrodes, and the envelope. And a sealing gas for accelerating the ignition operation of the ignition member at the time of electric discharge between the pair of discharge electrodes, wherein the combustion of the ignition element by the electric discharge thermally destroys the envelope, A heat source ignition element that ignites a heat source arranged around the enclosure. 2. The heat source ignition element according to claim 1, wherein the envelope is made of soda glass or lead glass. 3. The heat source ignition element according to claim 1, wherein the ignition member is made of a metal mixture such as zirconium, potassium perchlorate, and phosphorus. 4. The heat source ignition element according to claim 1, wherein the filling gas is a mixed gas of nitrogen and oxygen or a single gas of oxygen. 5. A pair of discharge electrodes, one of which is a single metal such as copper, nickel, iron, manganese, or the like, or an encapsulation metal made of a plurality of alloys, and the tip fixed to the encapsulation metal has a needle shape. It is made of a molded tungsten wire, and the other is made of a single metal such as copper, nickel, iron, or manganese, or an encapsulated metal made of a plurality of alloys, and has a holding portion for holding a firing element at its tip. 2. The heat source ignition element according to 1.