JPH0759431B2 - Container with heating function equipped with ignition avoidance mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a container with a heating function, and particularly to a container with a heating function provided with an ignition avoidance (safety) mechanism.

(Prior Art and Problems to be Solved by the Invention) Conventionally, as a heating container utilizing heat generated by a self-combustion reaction of an exothermic agent composed of a mixture of an oxygen supplying agent and a combustible agent, for example, Japanese Utility Model Publication No. 62-146427 No. and Jitsukai 63-4208
There are 9 and so on. In these heating containers, as a method of igniting the heat generating agent, a structure is used in which a squib or a filament type electric heater connected to the heat generating agent is used for ignition.

However, with these heating vessels, when igniting,
It requires a separate igniter such as electricity to operate a match, a lighter, or a filament type electric heater to ignite the squib, which is very inconvenient to use.
In particular, in the structure in which the squib is ignited, when the heating container is used outdoors, there is a problem that it is difficult to use it in rainy weather or strong wind.

In order to solve the above problems in the prior art and to improve the ignition performance, the calorific efficiency, and the heating rate, the present applicant has already arranged the heating element in contact with the heating agent and the heating agent. Various heating containers have been proposed which are composed of an igniting agent which is easier to ignite than a heat generating agent and an igniting section which is arranged near the igniting agent.

For example, as disclosed in JP-A-2-7918 and JP-A-1-288218, a mixture of red phosphorus, potassium chlorate, etc. is ignited by frictional heat, or a flint is rubbed to generate a spark. Accordingly, there is a heating container that ignites the igniting agent to self-burn the exothermic agent. Furthermore, in order to prevent ignition due to erroneous operation in the heating container,
As a structure in which a part of an igniter for igniting an igniting agent is installed at a location apart from the igniting agent in a container and is inserted at the time of ignition operation, Japanese Patent Laid-Open No. 2-49162 and Japanese Utility Model Laid-Open No. 2
9622 and Japanese Utility Model Sho 63-156177.

The present invention, in the heating container, for the purpose of preventing ignition by erroneous operation, if the contents are not filled in the heating container, if only dry material is filled,
Furthermore, it does not easily ignite or generate heat when it is not filled with a predetermined amount of contents, and sufficiently absorbs the heat of the heating element consisting of water or a fluid containing water as a main component or a mixture of these and solids. It is an object of the present invention to provide a container with a heating function capable of igniting and generating heat only when a predetermined amount of a substance to be heated is filled.

(Means for Solving the Problems) The present invention has been made in view of the above problems and objects, and is a substance to be heated which is composed of water or a fluid containing water as a main component or a mixture of these and solids. Heating element for heating
And a heating function container having an ignition mechanism for causing the heating element to generate heat, wherein the ignition mechanism generates electricity by a pressure such as a striking force, and a pressure application for applying pressure to the piezoelectric element. A device, a sensing device for sensing whether a predetermined amount of the substance to be heated is filled in the container, and the sensing device sensing that the container has been filled with the substance to be heated in a predetermined amount. An ignition discharge device that discharges electricity generated by the piezoelectric element to ignite and heat the heating element; and the sensing device does not sense that a predetermined amount of the substance to be heated is filled in the container. In this case, the avoidance discharge device discharges electricity generated by the piezoelectric element at a position separated from the heating element, and a container with a heating function.

More specifically, in a container with a heating function, a piezoelectric element that generates electricity by a pressure such as impact, a hammer member for impacting the piezoelectric element, and water in the container or a fluid containing water as a main component. There are provided a sensing electrode for sensing that the battery is filled, an ignition discharge electrode for discharging electricity, and an avoidance discharge electrode.

In the circuit connecting each electrode and the piezoelectric element, the ignition discharge electrode and the sensing electrode are connected in series, and this and the avoidance discharge electrode are connected in parallel, and connected to the positive electrode and the negative electrode of the piezoelectric element.

Further, the size of the gap between the electrodes (that is, the size of the insulation resistance) is smallest in the ignition discharge electrode, and then increases in the order of the avoidance discharge electrode and the sensing electrode.

(Operation) Here, by hitting the piezoelectric element with the hammer member provided in the container with heating function, a high voltage of tens of thousands of volts is generated at both ends of the piezoelectric element, and the contents in the container with heating function are When not filled, the gap between the sensing electrodes is large and it is difficult to discharge.Therefore, a spark is generated in the gap between the avoiding discharge electrodes, which are located farther from the heating element and are more easily discharged, and Ignition is avoided.

On the other hand, when a container with a heating function is filled with a substance to be heated which is inferior in insulating property to water or a fluid containing water as a main component or air composed of a mixture of these and solids, the gap between the sensing electrodes is increased. Through the liquid contents that exist between
Since electricity is conducted and the gap between the ignition discharge electrodes is smaller than the gap between the avoidance discharge electrodes (that is, because the electric resistance of the ignition discharge electrodes is smaller), a spark is generated between the ignition discharge electrodes. The heating element is ignited, the heating element generates heat, and the contents can be heated.

Therefore, in the present invention, the container with the heating function is not filled with the contents, or when the predetermined amount of the contents is not present, or when only the dry material is filled, the ignition is carelessly performed. Even if the operation is performed, the heating element does not generate heat, and the heating is performed only when the appropriate amount of the content is filled in a predetermined amount.

(Example) Hereinafter, the heating functional container of the present invention will be described in more detail based on an example of the accompanying drawings.

As shown in FIG. 1 and FIG. 5, a metallic heating element container 3, which is also made of metal, is provided in the lower part of a substantially cylindrical container body 1 made of metal, preferably steel. 5 are accommodated. An ignition unit 6 made of a material that is easier to ignite than the heating element is attached to the lower central portion of the heating element 5.

Further, a heat insulator 4 is attached below the ignition part 6, a concave portion 4a for accommodating ignition discharge electrodes 9, 9 described later is provided in an upper central portion thereof, and an ignition discharge electrode 9, 9 is provided in a central portion thereof. Through holes 4b into which support members 9a for supporting 9 are fitted are formed respectively.

Further, a power generation substrate 14 is disposed below the heat insulating body 4, and the ignition discharge electrode 9, through the through hole 14a formed in the central portion of the power generation substrate 14 and the through hole 4b of the heat insulating body 4, Support member 9a for supporting 9 is inserted and fitted, and ignition discharge electrodes 9, 9
Are housed in the recess 4 a of the heat insulating body 4.

Further, as shown in FIGS. 1 and 2, on the power generation substrate 14 so as to be parallel to the line D passing through the center thereof,
The piezoelectric element 7 is supported via the support member 7a. Further, in order to strike the one end 7b of the piezoelectric element 7, the hammer member 8 is perpendicular to the line D passing through the center by the support member 13a via the leaf spring 13 so as to be perpendicular to the line D. Sticked on.

On the other hand, the avoidance discharge electrode 10 is provided on the power generation substrate 14 near one outer end on the line D passing through the center thereof, and the sensing electrode 11 is provided at the other end as described later.

Then, so as to form an electric circuit as shown in FIG. 3, the ignition discharge electrodes 9 and 9 and the sensing electrode 11 are connected in series via the conductor 15 and the avoidance discharge electrode 10 is connected in parallel, These are connected to the positive electrode and the negative electrode of the piezoelectric element 7. In addition,
The ground shown in FIG. 3 is connected at an appropriate point on the container body 1 so that the container body 1 itself serves as the other ends (other electrodes) of the avoidance discharge electrode 10 and the sensing electrode 11.

Further, as shown in FIG. 1 and FIG. 5, a bottom cover 16 is rotatably mounted on the bottom of the container body 1, and the center of the bottom cover 16 is toothed toward the inner circumference in one direction. The ratchet gear 21 on which 21a is formed is fixed to the bottom cover 16 by a fixing member 21b. A ratchet pawl 20 is mounted inside the ratchet gear 21 so as to be rotatable about the center of the bottom lid 16 as a shaft 16a. The ratchet claw 20 includes a plurality of claw portions 20a.
Are provided so as to project, and the claws 20a mesh with the teeth 21a formed on the inner circumference of the ratchet gear 21 (see FIG. 4).

A trigger member 12 is fixed to the center of the upper portion of the ratchet pawl 20. A plurality of protruding portions 12a are radially formed on the trigger member 12, and when the trigger member 12 rotates, the protruding portions 12a engage with one end 13b of the leaf spring 13 of the hammer member 8. (See FIG. 2). Note that these members are molded from an insulating material such as synthetic resin so that electricity from the piezoelectric element 7 is not conducted.

With this configuration, when igniting, FIG. 2 and FIG.
When the bottom lid 16 is rotated counterclockwise as shown by arrow E in the figure, the ratchet gear 21 rotates in the E direction together with the bottom lid 16, and the teeth 21a formed on the inner circumference of the ratchet gear 21.
Engage with a plurality of claw portions 20a provided on the ratchet claw 20 (see FIG. 4). As a result, the ratchet claw 20 is also E
The trigger member 12 fixed to the ratchet pawl 20 also rotates in the same direction. Further, as the trigger member 12 rotates, one of the projecting portions 12a of the trigger member 1 has one end 13b of the leaf spring 13 to which the hammer member 8 is attached.
, Which causes the leaf spring 13 to bend in a direction away from the piezoelectric element 7. When the bottom lid 16 is further rotated, the engagement between the protruding portion 12a of the trigger member 12 and the one end 13b of the leaf spring 13 is released, and the elastic force of the leaf spring 13 causes the hammer member 8 to move.
Applies a striking force to one end 7b of the piezoelectric element 7 to generate a high voltage across the piezoelectric element 7 (see FIG. 2). Therefore, when igniting, the ignition operation can be easily performed by simply turning the bottom lid.

On the other hand, when the bottom cover 16 is rotated in the direction opposite to the arrow E in FIG. 2, that is, in the clockwise direction in FIG.
One of the projecting portions 12a of the above is engaged with one end 13b of the leaf spring 13 to bias the hammer member 8 toward the piezoelectric element 7,
Is fixed to the power generation board 14, so that the trigger member 12 cannot rotate any more. Therefore, by the force of further rotating the bottom cover 16 in the clockwise direction, the claw portion 20a of the ratchet claw 20 is bent, and the engagement with the tooth 21a of the ratchet gear 21 engaged with the ratchet claw 20 is released, causing the wheel to idle.
The rotation of the bottom lid 16 is not transmitted to the trigger member 12 (see FIG. 4). Therefore, even if the bottom cover 16 is accidentally rotated in the opposite direction, an excessive force is not applied to the trigger member 12, the hammer member 8, the piezoelectric element 7 or the like, or the mounting portions thereof, and the like when transporting the container. Ignition due to vibration can be avoided and damage due to misuse is prevented.

In addition, the sensing electrode 11 is covered with a coating having high insulation strength, preferably a synthetic resin insulation coating 22, and the power generation substrate
Around the inside of the container body 1 from between 14 and the container body 1 substantially vertically up to a predetermined water level line 18. The tip portion of the sensing electrode 11, that is, the exposed portion 17 of the sensing electrode, is formed shorter than the insulating coating 22, and the concave portion of the tip portion formed by this is a hydrophilic member 19 such as hydrophilic felt having a capillary action. Has been blocked.

Therefore, even if the tip portion of the sensing electrode 11 contacts the inner wall surface of the container body 1, the exposed portion 17 of the sensing electrode 11 and the container body 1 are insulated by the insulating coating 22, and the exposed portion 17 causes the container body 1 to contact. The distance to the container body 1, that is, the distance from the exposed portion 17 to the container body 1 via the hydrophilic member 19 is sufficiently large. In other words, the insulation resistance between the exposed portion 17 of the sensing electrode 11 and the container body 1 is sufficiently larger than the insulation resistance between the avoidance discharge electrode 10 provided on the power generation substrate 14 and the container body 1. It is configured. That is, the distance from the exposed portion 17 of the sensing electrode 11 to the container body 1 via the hydrophilic member 19 is
It is configured to be sufficiently larger than the distance between the avoidance discharge electrode 10 and the container body 1.

Therefore, when the content 2 is not filled inside the container body 1, or when the predetermined amount of the content 2 does not exist (that is, when the content 2 is not filled up to the water level line 18),
Alternatively, when only the dry material is filled, if an ignition operation is performed, a discharge spark is generated between the avoidance discharge electrode 10 having a small insulation resistance and the container body 1, and the ignition discharge electrodes 9 and 9 are energized. Therefore, the heating element 5 is not ignited.

On the other hand, since the gap between the ignition discharge electrodes 9, 9 is smaller than the gap between the avoidance discharge electrode 10 and the container body 1, water or a fluid containing water as a main component or solids with these in the container body 1. When the contents 2 made of a material having a sufficiently poor insulating property as compared with air is filled up to the water level line 18 like a mixture with, a hydrophilic member 19 filled at the tip of the sensing electrode 11 A part of the content 2 penetrates to the exposed portion 17 due to the capillary action. As a result, the exposed portion 17 of the sensing electrode 11 and the container body 1 are short-circuited via the contents 2, and when the ignition operation is performed, the ignition discharge electrodes 9 and 9 having a small insulation resistance.
Discharge sparks are generated in the gap. As a result, the ignition part 6 and the heating element 5 are sequentially ignited, and heat generation is started.

Incidentally, at the tip of the ignition discharge electrode 9,9, iron, cobalt, nickel, metal powders of these such as zirconium or alloy powders thereof, so-called ignition alloys (for example, Misch metal, iron,
Alloys with nickel or copper added, lanthanum with magnesium, lead, tin, etc. alloys, vanadium-iron alloys, etc.)
If powders such as the above are applied in advance, when the discharge sparks of the ignition discharge electrodes 9 and 9 occur, the tips of the ignition discharge electrodes 9 and 9 are ignited, and the ignition part 6 and the heating element 5 are sequentially ignited. It becomes easier and more reliable.

Further, as in the conventional case, the conductive wire 15 provided on the power generation substrate 14
Also, the avoidance discharge electrode 10 may be a conductor wire coated with polyvinyl chloride, polyethylene, polypropylene, polyamide, fluororesin, or the like, or an electrode formed by press-molding phosphor bronze or the like, but carbon, aluminum, etc. Power generation board by mixing the conductive material of
It is possible to make the structure cheaper and simpler by directly applying it to the power generation substrate 14 or by directly attaching a conductive material such as a metal foil to the power generation substrate 14.

Further, as disclosed in JP-A-2-7918 and JP-A-1-288218, as the heating element 5, iron oxide, copper oxide,
Prepared by appropriately selecting from an oxidant composed of a metal oxide such as lead oxide and a combustible agent composed of a metal such as titanium or iron having a larger heat of oxidation than the metal forming the oxidizer or a semimetal such as silicon. In addition, if the ignition part 6 is appropriately selected and prepared from an oxidizing agent such as barium peroxide, copper oxide, or strontium peroxide and a combustible agent such as magnesium, aluminum, calcium, or boron, the ignition performance and the calorific efficiency can be improved. , It is possible to improve the heating rate.

Furthermore, as the heat insulating body 4, any heat insulating material having an excellent adsorption of odor and gas, which is slightly generated at the time of ignition and heat generation, may be used, and zeolite is preferably used as an example.

The above-described embodiment is merely a description of a preferred embodiment of the present invention, and those skilled in the art can easily make changes and modifications. The scope should be limited only by the scope of the claims.

(Effect) According to the present invention, when the contents are not filled in the heating container, only the dry material is filled, and further, the predetermined amount of contents is not filled, it is easy. Ignition / ignition occurs only when a predetermined amount of a substance to be heated, which does not ignite / generate heat and absorbs heat of water or a fluid consisting mainly of water or a mixture of these and solids, is sufficiently absorbed. A container with a heating function capable of generating heat can be provided.

Therefore, similar to the conventional technology, it is possible to reliably ignite and generate heat with a simple operation, and to provide an extremely safe and convenient container with a heating function that does not ignite due to misuse or vibration during transportation. It is an excellent invention that has many effects such as being possible.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a container with a heating function of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. FIG. 4 is a sectional view taken along the line BB in FIG. 1, and FIG. 5 is a vertical sectional view taken along the line CC in FIG. 1 ... container body, 2 ... contents, 3 ... heating element container, 4
...... Heat insulator, 5 ...... Heating element, 6 ...... Ignition part, 7 ...... Piezoelectric element, 8 ...... Hammer member, 9 ...... Ignition discharge electrode, 10 ...
… Avoiding discharge electrode, 11 …… Sensing electrode, 12 …… Trigger member, 13 …… Leaf spring, 14 …… Power generation board, 15 …… Conducting wire, 16…
… Bottom lid, 17 …… Exposed part, 18 …… Water line, 19 …… Hydrophilic member, 20 …… Ratchet claw, 21 …… Ratchet gear, 22
…… Insulation coating.

Claims (14)

[Claims] 1. A heating element for heating a substance to be heated composed of water or a fluid containing water as a main component or a mixture of these and a solid, and heating provided with an ignition mechanism for causing the heating element to generate heat. A container with a function, wherein the ignition mechanism includes: a piezoelectric element that generates electricity by a pressure such as a striking force; a pressure applying device that applies pressure to the piezoelectric element; and a predetermined amount of the substance to be heated filled inside the container. A sensing device that senses whether or not the heating is performed, and when the sensing device senses that a predetermined amount of the substance to be heated is filled in the container, discharges electricity generated by the piezoelectric element to generate the heat. An ignition discharge device for igniting and heating the body, and, when the sensing device does not sense that a predetermined amount of the substance to be heated is filled in the container, separates electricity generated by the piezoelectric element from the heating element. Heating function with container, characterized in that position and a avoidance discharge device for discharging, at that. 2. A piezoelectric device, a sensing device, an ignition discharge device,
The container with a heating function according to claim 1, wherein the avoidance discharge device and the avoidance discharge device are electrically connected to each other. 3. The piezoelectric element, sensing device, ignition discharge device,
3. The heating function according to claim 2, wherein the avoidance discharge device is electrically connected to each other by providing a conductive material on a substrate formed of an insulating material. container. 4. The electric discharge device and the sensing device are connected in series, and the avoiding discharge device is connected in parallel to form an electric circuit connected to the positive electrode and the negative electrode of the piezoelectric element. The container with a heating function according to claim 2 or 3. 5. The container with a heating function according to claim 1, wherein the ignition discharge device, the avoidance discharge device, and the sensing device are configured to be difficult to discharge in this order. . 6. The sensor according to claim 1, wherein the sensing device comprises a sensing electrode, the ignition discharge device comprises an ignition discharge electrode, and the avoidance discharge device comprises an avoidance discharge electrode. The container with a heating function according to claim 5. 7. The container with a heating function according to claim 6, wherein the distance between the electrodes is configured to increase in the order of the ignition discharge electrode, the avoidance discharge electrode, and the sensing electrode. 8. The heating according to claim 6, wherein the ignition discharge electrode is coated with an ignition material that is relatively easy to ignite, and the ignition discharge electrode itself has an ignition function. Functional container. 9. A container body of a container with a heating function and / or a container for accommodating a heating element is formed of a conductive material, and the container for accommodating the container body and / or a heating element is provided with a sensing electrode and / or a bypass. The container with a heating function according to any one of claims 6 to 8, wherein the container has one electrode of a discharge electrode. 10. The sensing electrode is coated with an insulating coating,
10. The container with a heating function according to claim 6, wherein the sensing electrode is configured to communicate with the outside of the insulating coating through a material having a capillary action. 11. The container with a heating function according to claim 1, wherein the pressure applying device is configured to apply a striking pressure to the piezoelectric element by a hammer member. . 12. The hammer member engages with the projecting portion by the rotation of a trigger member having a plurality of projecting portions projecting radially with respect to a rotating shaft, and the hammer member strikes the piezoelectric element. 12. The container with heating function according to claim 11, wherein the container with heating function is configured to apply pressure. 13. A ratchet pawl that is rotatably supported is provided at substantially the center of a bottom lid that fits into the bottom of the container body, the trigger is fixed to the ratchet pawl, and the ratchet pawl is meshed with the ratchet pawl. The ratchet gear having a one-directional tooth portion on the inner circumference is fixed to the bottom lid, so that when the bottom lid is reversely rotated, the ratchet pawl idles and the trigger member does not rotate. Claims characterized in that
The container with a heating function described in 12. 14. The heating element comprises a heating agent and an ignition agent which is disposed in contact with the heating agent and which is easier to ignite than the heating agent which is disposed near the ignition discharge device. The container with a heating function according to any one of claims 1 to 13, characterized in that