JPH0544926A - Heat source firing element - Google Patents

Abstract

PURPOSE:To obtain a small-sized, light-weight and inexpensive heat source firing element prominent in humidity resistance and firing stability which fires a heat source, by arranging the element near the heat source for heating a heating object by burning itself, and making fire and combustion by the use of discharge of a pair of discharging electrodes which are arranged on both ends of an enclosure. CONSTITUTION:A heat source firing element is provided with a pair of discharging electrodes 2 and 3 which are sealed airtightly on both ends of an enclosure 1, an ignition member 7 of a high ignitability which is provided on one of the discharging electrodes 3, and sealed gas 8 which is sealed in the surrounding container 1 to promote igniation of the ignition member 7 at a time of discharge between the pair of discharging electrodes 2 and 3.

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 used for igniting a heat source, which is disposed in the vicinity of a heat source for heating an object to be heated by burning the heat source, and in particular, to ignite the heat source. An enclosure for combustion that accompanies combustion of an ignition member provided in the envelope due to a discharge operation between a pair of discharge electrodes arranged at both ends of the envelope and destruction of the envelope due to the combustion. The present invention relates to a heat source ignition element realized by utilizing external supply, which is small in size, low in price, excellent in moisture resistance, and excellent in 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 an object to be heated, which is food such as sake, instant noodles, curry, coffee, etc. As an example, a self-combustion type exothermic 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, a method for igniting the above self-combustion type exothermic agent is also disclosed in the above-mentioned publication, for example, an electric heater connected to the exothermic agent, a squib Alternatively, a method of heating the above exothermic agent for a while with a lighter or the like is well known, and
Regarding the ignition operation itself, an ignition tool or a heat source ignition element such as a battery, a metal that causes a spark by a match or friction, or a piezoelectric element that generates a spark is required.

[0003]

However, the method using the above 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. However, the ignition structure is complicated, the device shape is large, and the cost is increased.

Further, in the method using a squib, it is necessary to prepare a igniter which is, for example, a match as described above, and the squib itself is easily affected by humidity, so that the igniter of a match, a lighter, etc. There is a disadvantage that the preparation may be forgotten or the heat source, which is the heat source, may not be easily ignited depending on the environment of the ignition site.

Further, in the method using a lighter, the state of sparks generated by friction of metal greatly varies depending on the state of friction, and if the frictional operation is performed several times in order to ignite the heat generating agent as a heat source. It had an inconvenience.

Further, the method of utilizing the spark by the piezoelectric element also has the disadvantage that the piezoelectric element itself is easily affected by the impact of humidity and temperature, and the impact causes malfunction or a reduction in output due to blank driving. It was

The present invention has been made in consideration of the above disadvantages, and an object of the present invention is 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 facing each other at both ends of an envelope and hermetically sealed, and on one electrode of the pair of discharge electrodes. It is configured to include a highly ignitable ignition member, and an enclosed gas that is enclosed in the envelope and that promotes the ignition operation of the ignition member during discharge 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 heat generated by this combustion causes thermal destruction of the envelope.

When the envelope is thermally destroyed, rapid heat generation due to the combustion of the ignition member is supplied to the outside of the envelope, and thus the book including the envelope is provided in the vicinity of the heat source. By arranging the heat source ignition element according to the invention, ignition of the heat source can be surely realized at the time of thermal destruction of the envelope.

[0011]

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 opposed to each other and are hermetically sealed. As the envelope 1, a glass bulb made of soda glass or lead glass, which is easily destroyed by heat by abrupt application of heat, is preferable.

One discharge electrode 2 of the pair of discharge electrodes 2 and 3
Is a single metal such as copper, nickel, iron, or manganese, or an alloy of a plurality of types, and an enclosed metal 4 having a thermal expansion coefficient substantially equal to the thermal expansion coefficient of the lead glass or the like forming the envelope 1. The end of the metal seal 4 is fixed to the end of the metal 4 by welding, for example, and is composed of a tungsten wire 5 formed in a needle shape.

The other discharge electrode 3 is made of copper, nickel, iron,
Made of a single metal such as manganese, or multiple types of alloys,
It is composed of an enclosed metal 4 having a coefficient of thermal expansion substantially equal to that of the lead glass or the like forming the envelope 1.

A plate-shaped holding portion 6 is formed at the tip of the discharge electrode 3 by molding a part of the discharge electrode 3 or attaching an independent metal flat plate by welding, and this holding portion 6 is formed. 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 of zirconium, potassium perchlorate, phosphorus and the like.

Inside the envelope 1, a mixed gas of nitrogen and oxygen or a single gas of oxygen is enclosed as an enclosed gas 8 for promoting the ignition of the ignition member 7 described above.

The structure of one embodiment of the heat source ignition element according to the present invention has been described above. Basically, it has a known discharge tube structure, and its structure is simple and its shape can be downsized. it is obvious.

Now, in the heat source ignition element according to the present invention having the above-mentioned structure, the power source (not shown in FIG. 1) is placed between the pair of discharge electrodes 2 and 3, and between the discharge electrodes 2 and 3. 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 and 3, the igniting member 7 having high ignitability instantly ignites and burns to generate a high temperature, which is supplied to the envelope 1.

The envelope 1 is thermally destroyed by being supplied with the high temperature generated by the ignition member 7, that is, by the rapid application of heat, and as a result, the high temperature continues to be outside the envelope 1. Will be supplied.

Therefore, if any heat source that emits a high temperature due to its own combustion is arranged in the vicinity of the envelope 1, this heat source will ignite at the time when the envelope 1 is thermally destroyed. It will be supplied with the high temperature generated by, and will be ignited easily and surely.

Here, as for the ignition operation,
It is obvious that the stability of the operation is improved because it is realized through the operation of easily managing the operation time of the discharge between the pair of discharge electrodes 2 and 3 in the heat source ignition element.

Also, the ignition structure is basically formed by a miniaturized heat source ignition element, a power source, and control means for controlling the supply timing of this power source to the heat source ignition element, which simplifies It is also clear that it can be miniaturized.

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

FIG. 2 is an electric circuit diagram showing a specific example of use 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 source 9 capable of performing a discharge operation between the pair of discharge electrodes 2 and 3 through a starting means 10 and an operation control means 11. There is.

Further, the heat source 12 is arranged close to the heat source ignition element T according to the present invention. The starting means 10 is a means for determining the time when the heat source 12 is ignited, operates when ignition is necessary, and cooperates with the operation control means 11 described later to supply the power source 9 to the heat source ignition element T. Will be possible.

The operation control means 11 is a means for detecting whether or not the ignition condition for the heat source 12 is satisfied. The operation control means 11 operates when the ignition condition is satisfied, and the heat source ignition element T of the power source 9 is operated. It will be ready for supply.
For example, in the field of the container with a heating device mentioned at the beginning, whether or not the food is in a condition in which it can be heated and cooked, specifically, water is present in the container in an amount necessary for cooking. It is possible to supply the power supply 9 according to the operation of the starting means 10 if it exists, and if it does not exist, the supply of the power supply 9 is blocked regardless of the state of the starting means 10. It is a means that operates to

With the above configuration, for example, when it is desired to ignite the heat source 12, the starting means 10 is operated, and if the detection result by the operation control means 11 at this time satisfies the ignition condition, the power source 9 Will be applied to the heat source ignition element T via both the means 10 and 11.

Therefore, the heat source ignition element T is discharged between the pair of discharge electrodes 2 and 3, and as described above, the ignition operation causes the ignition member 7 to ignite and burn to generate a high temperature. Will be done.

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 arranged in the vicinity of the envelope 1. As a result, the ignition operation for the heat source 12 is performed.

[0032]

Since the heat source ignition element according to the present invention has a structure in which the ignition member for igniting the heat source is enclosed in the glass bulb until the time of ignition, the environment conditions in which it is used, that is, humidity and temperature are used. It has the effect of not being affected by environmental conditions such as.

Further, since the ignition member is ignited and burned through the discharge operation whose operation timing is easy to manage, the high heat generated by the ignition member can be supplied to the heat source at a desired time. As a result, the heat source can be supplied to the heat source. This has the effect that the ignition operation can be realized reliably and stably.

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

[Brief description of 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 example of use of the heat source ignition element according to the present invention.

[Explanation of symbols]

 1 Enclosure 2 Discharge Electrode 3 Discharge Electrode 4 Enclosed Metal 5 Tungsten Wire 6 Holding Part 7 Ignition Member 8 Enclosed Gas 9 Power Supply 10 Starting Means 11 Operation Control Means 12 Heat Source

Claims (5)

[Claims] 1. A pair of discharge electrodes, which are opposed to each other at both ends of an envelope and are hermetically sealed, an ignition member having a high ignitability provided on one of the pair of discharge electrodes, and the envelope. A sealed gas that is sealed inside and that accelerates the ignition operation of the ignition member at the time of discharge between the pair of discharge electrodes, thermally destroys the envelope by combustion of the ignition element by the discharge, and 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 of zirconium, potassium perchlorate, phosphorus and the like. 4. The heat source ignition element according to claim 1, wherein the enclosed 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 sealed metal made of a single metal such as copper, nickel, iron, manganese, or an alloy of a plurality of types, and a tip fixed to the sealed metal is needle-shaped. A formed tungsten wire, the other is made of a single metal such as copper, nickel, iron, manganese, etc., or a sealed metal made of a plurality of alloys, and has a holding portion for holding the ignition element at its tip. 1. The heat source ignition element according to 1.