JP3024834B2 - Igniter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniter for igniting a heating agent for heating, for example, a simple heating type food or drink or a heating and transpiration type insecticide / sterilizing smoke agent.

[0002]

2. Description of the Related Art For example, a smoke generating device that heats and burns a fume generating agent and a heat evaporation type insecticide / sterilizing smoke device that decomposes and smokes a chemical are those having a built-in heat generating mechanism. ing. Recently, simple heating-type food and beverage containers incorporating a disposable heat generating mechanism for heating food and drink in the containers have become widespread.

Various methods have been used for the heat generating mechanism, such as a method of heating by an electric heater and a method of utilizing heat generated by a hydration reaction of calcium oxide or aluminum. Recently, in order to increase thermal efficiency, those using a heat generating agent utilizing heat generated by combustion of a metal powder and a metal oxide have been widely used.

A heat generating mechanism using a heat generating agent has a structure in which a heat generating agent housed in a heat generating chamber inside an appliance is heated by an operation from outside the heat generating chamber. Examples of the igniter for the exothermic agent include one utilizing friction of a igniter, energization of a heating resistance wire, and transmission by a squib.

However, when igniting a heating agent in which metal powder and metal oxide are mixed, an ignition device using a igniter or a heating resistance wire has a complicated structure and poor ignition reliability. Due to the high cost, it is not suitable for disposable items.
An igniter using only a squib is simple in structure and inexpensive, but the explosive of the squib is gasified and dissipated when burned, so a hole is formed along its initial shape, and the heating chamber and the outside are separated. I will communicate. In this case, there is a danger that a high-temperature flame or gas due to the combustion of the exothermic agent may blow out through the hole.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to reliably ignite the exothermic agent, maintain its own shape even after combustion, and maintain the closed state of the exothermic chamber. It is another object of the present invention to provide a highly safe igniter that does not emit a combustion flame or a combustion gas of a heating agent to the outside.

[0007]

The igniter according to the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments.

As shown in FIG. 1, a igniter 1 according to a first aspect of the present invention comprises a match pill 3 and a match pill 3 at both ends of a igniter 2 composed of a vegetable fibrous combustible material impregnated with nitrate and water glass. 4 is provided.

The igniter 1 of the second invention is a igniter 2 made of a vegetable fibrous combustible material impregnated with nitrate and water glass.
Is provided with a match head medicine 3 at one end and an igniting agent 4 made of metal oxide and boron at the other end.

A igniter 1 according to a third aspect of the present invention is a igniter 2 made of a vegetable fibrous combustible material impregnated with nitrate and water glass.
Is provided with a match head medicine 3 at one end and an igniting agent 4 made of metal oxide and ferrosilicon at the other end.

The igniter 1 according to a fourth aspect of the present invention is provided with a matchhead 3 at one end of a squib 2 and an igniter 4 made of metal oxide and ferrosilicon at the other end.

The igniter 2 is 10 parts by weight with respect to 100 parts by weight of water.
A vegetable fibrous combustible material is immersed in an aqueous solution in which about 50 parts by weight of nitrate and 5 to 30 parts by weight of water glass are dissolved and dried.

The vegetable fibrous combustible material that is the base material of the igniter 2 is one that burns stably with nitrate. For example, paper, cotton, hemp, and recycled fibers are suitable. The form is not particularly limited, but in the case of paper, a plate-like or rod-like thing is preferable. In the case of cotton, hemp and regenerated fibers, ropes that are readily available are suitable.

As the nitrate, for example, potassium nitrate, sodium nitrate, ammonium nitrate, strontium nitrate and lead nitrate can be used.

The concentration of the aqueous solution of nitrate is preferably 10 to 50 parts by weight based on 100 parts by weight of water. When the amount is less than 10 parts by weight, the flammability is low, and when the amount exceeds 50 parts by weight, the flammability does not change.

The concentration of the aqueous solution of water glass is preferably 5 to 30 parts by weight with respect to 100 parts by weight of water. When the amount is less than 5 parts by weight, the effect of suppressing the combustion of water glass decreases, and when the amount exceeds 30 parts by weight, the effect of suppressing the combustion of water glass increases, and the fibrous fibrous material extinguishes in the middle of combustion. I will.

The metal oxide used for the igniter 4 is, for example, one or more selected from iron oxide, copper oxide and lead oxide. These metal oxides are used, for example, in a mixture with boron, ferrosilicon or metal powder.

In the fourth invention, as the squib 2, for example, a general-purpose squib in which black powder is included in paper can be used. When using the squib 2, it is desirable to use, as the igniting agent 4, a mixture of a metal oxide and ferrosilicon whose remnant after burning maintains the shape before burning.

[0019]

[Effect] The match head medicine 3 is rubbed and ignited by the match rubbing plate. Then, the igniter 2 is burned and propagated, and the match head medicine and the igniting agent 4 at the other end are burned, and the adjacent exothermic agent 5 (see FIG. 2).
Is ignited.

The igniter 2 made of a vegetable fibrous combustible material impregnated with nitrate and water glass, which is used for the igniter 1 of the first, second and third inventions, is vaporized or burned by combustion. Since the shape of the heating chamber 14 is maintained without shrinking, the closed state of the heat generating chamber 14 is maintained, and no flame or high-temperature gas is emitted by the combustion of the heat generating agent 5.

In the case of the igniter 1 of the fourth aspect of the invention, the shape of the squib 2 is lost by the combustion, but the residual combustion of the igniting agent 4 made of metal oxide and ferrosilicon is maintained to maintain the shape before the combustion. The closed state of the chamber 14 is maintained, and the emission of the flame or the hot gas due to the combustion of the exothermic agent 5 is prevented.

[0022]

Embodiments of the present invention will be described below. FIG. 1 is a side view of an embodiment of an ignition device 1 according to the present invention. This igniter 1 is provided with match heads 3 and 4 at both ends of a igniter 2 in which a vegetable fibrous combustible material is impregnated with potassium nitrate and water glass.

The igniter 1 of the present invention is used, for example, by mounting it on a container 10 with a heating function shown in FIG. In the container 10 with a heating function, a metal cylinder 11 is divided by a partition plate 12, and an upper space is used as a storage section 13 for a heated object. The central portion of the partition plate 12 bulges toward the storage portion 13 side, and a heat generating chamber 14 for storing the heat generating agent 5 is formed together with the retaining plate 15. A heat insulating layer 16 made of ceramic fibers is provided below the fastening plate 15, and is supported by a fixing plate 17.

The igniter 1 is mounted so as to penetrate the fixing plate 17, the heat insulating layer 16 and the fastening plate 15. A through-hole is formed in the retaining plate 15 immediately below the exothermic agent 5, and the igniter 1 is arranged close to the exothermic agent 5 with the match head medicine 4 penetrating into the through-hole, and the match head medicine 3 is fixed on the fixing plate. It projects downward through 17 through holes. The heating chamber 14 is closed by the igniter 1 itself and the heat insulating layer 16.

When the match head medicine 3 is frictionally ignited by the rubbing plate of the match, the igniter 2 is propagated by burning and the other end of the ignition agent 4
Are burned, and the exothermic agent 5 starts igniting and burning. The object to be heated in the storage section 13 is heated via the partition plate 12 by the combustion of the exothermic agent 5. Although the combustion temperature of the exothermic agent 5 is as high as 800 to 1200 ° C., since the igniter 2 and the igniting agent 4 maintain their initial shapes without shrinking or vaporizing even after burning, the heat insulating layer 16 is used.
There is no gap between the heat generating agent 14 and the heat generating chamber 14, and the closed state of the heat generating chamber 14 is maintained, so that the flame or the high-temperature gas due to the combustion of the heat generating agent 5 does not blow out.

Example 1 A rod-shaped Japanese paper was immersed in an aqueous solution in which 40 parts by weight of potassium nitrate and 10 parts by weight of water glass were dissolved in 100 parts by weight of water for 20 minutes, and then dried at 60 ° C. for 1 hour for induction. A fire body 2 was prepared, and match head medicines 3 and 4 were provided at both ends of the fire body 2 to prepare an ignition device 1 shown in FIG. The obtained igniter 1
Is mounted on the container with heating function 10 shown in FIG. The container 10 with a heating function contains 80% by weight of iron oxide pressed into a columnar shape having a diameter of 50 mm and a thickness of 15 mm and ferrosilicon 20.
About 60 g of the exothermic agent 5 in% by weight is stored. On the bottom of the exothermic agent 5, iron oxide 80 is added to increase the ignitability.
The igniting agent 6 consisting of 20% by weight and 20% by weight of boron is integrally formed. The container 13 is filled with 200 g of water.

When the match head medicine 3 is frictionally ignited by a match rubbing plate, the igniter 2 is propagated by combustion, the other match head medicine 4 is burned, and the igniting agent 6 and the exothermic agent 5 are ignited and burned. did. One minute after the start of combustion of the exothermic agent 5, the temperature of the water in the container 13 became 100 ° C., and the water continued to boil for about 3 minutes. When this test was repeated 10 times, the exothermic agent 5 could be reliably ignited in all tests. Further, the initial shape of the igniter 1 was maintained even after the combustion, no voids were generated, and no flame or gas ejection due to the combustion of the exothermic agent 5 was observed.

Example 2 A hemp rope having a diameter of 4 mm was impregnated with potassium nitrate and water glass in the same manner as in Example 1 to prepare a igniter 2.
A matchhead 3 was provided at one end, and an igniting agent 4 comprising 70% by weight of copper oxide and 30% by weight of boron was provided at the other end.

As the container 10 with a heating function, the one shown in FIG. 2 is used. This container 10 with a heating function is composed of about 6 wt.% Of iron oxide and 25 wt.
Only 0 g of the exothermic agent 5 is stored. The igniter 1 is mounted with the igniting agent 4 side close to the exothermic agent 5.

When the match pill 3 was ignited by friction with a rubbing plate of the match, the igniter 2 was propagated by combustion, the other match pill 4 was burned, and the exothermic agent 5 was ignited and burned. Housing 1
The water of No. 3 became 100 ° C. one minute after the start of combustion of the exothermic agent 5, and kept boiling for 2 to 3 minutes. When this test was repeated 10 times, the exothermic agent 5 could be reliably ignited in all tests. Further, the initial shape of the igniter 1 was maintained even after the combustion, no voids were generated, and no flame or gas ejection due to the combustion of the exothermic agent 5 was observed.

Example 3 In the same container 10 as in Example 1, a diameter of 20 mm and a thickness of 15 mm
About 10 g of the exothermic agent 5 composed of 30% by weight of lead oxide, 25% by weight of copper oxide, 25% by weight of ferrosilicon and 20% by weight of aluminum powder were mounted.
Example 1 except that a igniter 1 provided with a match head medicine 3 at one end of a 2 mm diameter squib 2 and an igniter 4 comprising 50% by weight of lead oxide, 35% by weight of ferrosilicon and 15% by weight of copper oxide at the other end. An ignition test was performed in the same manner as in Example 1. Container 1
0 contains a lintose 16% by weight, potassium chlorate 31% by weight, an auramine 53% by weight, and a smoke agent composed of a rubber liquid 5% by weight as an outer part, and a lid (not provided) having a smoke emission hole. (Shown) is attached.

The match head medicine 3 was ignited by friction with a rubbing plate of a match, and the test for observing the smoke state was repeated 10 times. As a result, in all the tests, the exothermic agent 5 could be ignited reliably and good smoke was generated. Obtained. In addition, even if the shape of the squib 2 was lost, no flame or gas was ejected due to the combustion of the exothermic agent 5.

Comparative Example 1 An ignition test was performed 10 times in the same manner as in Example 1 except that match heads 3 and 4 were provided at both ends of a stick-shaped Japanese paper to make an ignition device 1. When the match head medicine 3 was ignited by friction with a match rubbing plate, the match head medicine 3 only burned in the ten tests.

Comparative Example 2 A stick-shaped Japanese paper was immersed in a 40% aqueous solution of potassium nitrate, dried at 60 ° C. for 1 hour, and then provided with match head drops 3 at both ends to form an ignition device 1. An ignition test was performed in the same manner as in Example 1. When the match head medicine 3 was ignited by friction using a rubbing plate of the match, the igniter 2 propagated and burned, and the other match head medicine 4 burned, and the igniting agent 6 and the heating agent 5 ignited and burned. The residue of the igniter 2 contracted and the combustion chamber 14 communicated with the outside of the container, and when the exothermic agent 5 was ignited, a flame was blown out. High-temperature gas was ejected from the combustion chamber 14 until the combustion of the exothermic agent 5 was completed.

The following are the experimental results of the igniter 1 alone in which the type of the vegetable fibrous combustible material of the igniter 2 and the composition ratio of the impregnated nitrate and water glass were changed.

A vegetable fibrous combustible material as a base material of the igniter 2 was immersed in an aqueous solution having the composition shown in Table 1 for 20 minutes to impregnate nitrate and water glass, and then dried at 60 ° C. for 1 hour or more. To form the fuse 2. As a vegetable fibrous combustible material, cardboard with a thickness of 1 mm, a width of 10 mm and a length of 40 mm, and an outer diameter of 6 m
Newspaper rolled into a cylinder having a length of m, an inner diameter of 3 mm, and a length of 40 mm was used.

One end of the igniter 2 obtained in each of the examples and the comparative examples was ignited by using a match, and each of the examples and the comparative examples was subjected to 10 combustion tests. The combustion situation was observed. Table 1 shows the nitrate concentration, water glass concentration, burning time and burning situation.

[0038]

[Table 1]

According to the results shown in Table 1, the igniter 1 impregnated only with nitrate caused fire extinguishing on the way and the combustion residue was destroyed without leaving the initial shape. On the other hand, the igniter 1 impregnated with the nitrate and the water glass in the range of the predetermined compounding component has no significant change in the flammability even if the concentration of the nitrate or the water glass slightly changes, and no flame is generated. It can be seen that the combustion residue also maintains the initial shape and has stable combustion propagation performance.

[0040]

As described in detail above, the igniter of the present invention can reliably ignite the exothermic agent, maintains its own shape even after combustion, and closes the combustion chamber. Combustion gas does not erupt to the outside and safety is high. Therefore, it is most suitable as an igniter for a heating agent, especially a heating agent in which a metal powder and a metal oxide are mixed. Further, since the structure is simple and the manufacturing cost is small, it is suitable for disposable use.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of an ignition device to which the present invention is applied.

FIG. 2 is a longitudinal sectional view of a container with a heating function to which the ignition device of the present invention is attached.

FIG. 3 is a longitudinal sectional view of a container with a heating function to which the ignition device of the present invention is attached.

[Explanation of symbols]

1 is an igniter, 2 is a igniter, 3 and 4 are match heads, 5 is a heating agent, 6 is an igniting agent, 10 is a container with a heating function, 11 is a cylinder,
12 is a partition plate, 13 is a housing part, 14 is a heating chamber, 15 is a fastening plate, 16 is a heat insulating layer, and 17 is a fixed plate.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 55-114592 (JP, U) Japanese Utility Model Sho 55-12738 (JP, U) Japanese Utility Model Sho 57-125701 (JP, U) Japanese Utility Model Sho 59- 48472 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23Q 13/00

Claims (6)

(57) [Claims] 1. An ignition device comprising a igniter made of a vegetable fibrous combustible material impregnated with nitrate and water glass, wherein a match head medicine is provided at both ends of the igniter. 2. A igniter comprising a vegetable fibrous combustible material impregnated with nitrate and water glass, wherein one end is provided with a match head medicine and the other end is provided with an igniting agent comprising metal oxide and boron. Characteristic ignition equipment. 3. A igniter made of a vegetable fibrous combustible material impregnated with nitrate and water glass, one end of which is provided with a match head medicine and the other end is provided with an igniting agent comprising metal oxide and ferrosilicon. An ignition device characterized by the following. 4. An igniter comprising: a matchhead at one end of a squib; and an igniter comprising metal oxide and ferrosilicon at the other end. 5. The fusible element is immersed in an aqueous solution in which 10 to 50 parts by weight of nitrate and 5 to 30 parts by weight of water glass are dissolved with respect to 100 parts by weight of water. The igniter according to claim 1, wherein the igniter is dried. 6. The igniter according to claim 2, wherein the metal oxide is one or more compounds selected from iron oxide, copper oxide, and lead oxide. .