JPH0431270A - Container provided with heating function having ignition avoiding mechanism - Google Patents

Abstract

PURPOSE:To make ignition and heating possible only when the contents to be heated is filled in a predetermined amount by making up an ignition mechanism for the heating body to heat the contents of a piezoelectric element, of a pressure applicating device, a sensing device, an ignition discharge device and an adoidance discharge device. CONSTITUTION:An ignition mechanism is of such structure that, to effect an ignition, the one end of a piezoelectric element 7 is struck by a hammer member 8 through the elastic force of a plate spring 13 to produce a high voltage at both the ends of the piezoelectric element 7. A distance from the exposed part 17 of a sensing electrode 11 to a container body 1 via a hydrophilic part 19 is made fully greater than that between an avoidance discharge electrode 10 and the container body 1. For this reason, if an ignition operation is effected when the container body 1 is not filled with its contents 2, the contents 2 are not filled up to a water level line or only dry material is filled therein, a discharge spark is produced between the avoidance discharge electrode 10 small in insulation resistance and the container body 1 and ignition discharge electrodes 9 are not energized and, therefore, a heat producing body will not be fired.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a container with a heating function, and more 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 that utilizes heat generated by a self-combustion reaction of a heat generating agent consisting of a mixture of an oxygen supply agent and a combustible agent, for example, No. and Utsukai Showa 63-4
In these heating containers, such as No. 2089, the exothermic agent is ignited using a fuse or filament type electric heater connected to the exothermic agent.

However, in these heating containers, upon ignition,
In order to ignite the fuse, a separate igniter such as a match, a lighter, or a battery to operate a filament-type electric heater is required, which is very inconvenient to use.
In particular, with a configuration in which the fuse is ignited, there are problems such as difficulty in using the heating container outdoors in rainy weather or strong winds.

The present applicant has already proposed a method in which a heating element is disposed in contact with a heat-generating agent in order to solve the above-mentioned problems in the conventional technology and to improve ignition performance, caloric efficiency, and heating rate. We have proposed various heating containers that are composed of an ignition agent that is easier to ignite than a heat-generating agent, and an igniter disposed near the ignition agent.

For example, JP-A-2-7918 and JP-A-1-288
As seen in No. 218, a mixture of red phosphorus, potassium chlorate, etc. is ignited by frictional heat, or by rubbing a flint stone to generate sparks, the igniter is ignited and the exothermic agent self-combusts. There is a heating container for heating.

Furthermore, in order to prevent ignition due to incorrect operation in the heating container, a part of the igniter for igniting the ignition agent was removed.
Japanese Patent Laid-Open No. 2-49162 discloses a structure that is installed in a location away from the ignition agent in the container and inserted during ignition operation.
No., Utility Model Application No. 2-29622 and Utility Application No. 1983-156
There are issues such as No. 177.

The purpose of the present invention is to prevent ignition caused by erroneous operation in a heating container.
In addition, it does not easily ignite or generate heat if it is not filled with a predetermined amount of content, and it sufficiently absorbs the heat of a heating element made of water, a fluid mainly composed of water, or a mixture of these and solids. The purpose of the present invention is to provide a container with a heating function that can ignite and generate 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-mentioned problems and objects, and includes the following: A substance to be heated consisting of water, a fluid containing water as a main component, or a mixture of these and a solid. heating element for heating,
and a container with a heating function, comprising an ignition mechanism for causing the heating body to generate heat, wherein the ignition mechanism includes: a piezoelectric element that generates electricity by pressure such as a striking force; and a pressure application that applies pressure to the piezoelectric element. an apparatus, a sensing device for sensing whether a predetermined amount of the substance to be heated is filled inside the container, and a case where the sensing device senses that the predetermined amount of the substance to be heated is filled inside the container; To,
an ignition/discharge device that discharges electricity generated from the piezoelectric element to ignite and generate heat in the heating element; and an avoidance discharge device that discharges electricity generated from the piezoelectric element at a position separated from the heating element.

More specifically, a container with a heating function includes a piezoelectric element that generates electricity by pressure such as a blow, a hammer member for applying a blow to the piezoelectric element, and water or a fluid mainly composed of water inside the container. A sensing electrode for sensing that the battery is filled, an ignition discharge electrode for discharging electricity, and an avoidance discharge electrode are provided.

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

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

(Function) Here, by striking the piezoelectric element with the hammer member provided in the container with a heating function, a high voltage called volt is generated at both ends of the piezoelectric element, and the contents are released into the container with a heating function. If the sensing electrode is not filled, the gap between the sensing electrodes is large and does not allow discharge to occur. Therefore, discharge sparks are generated in the gap between the avoidance discharge electrodes, which are located away from the heating element and are more prone to discharge, and the sparks reach the heating element. ignition is avoided.

On the other hand, when a container with a heating function is filled with a material to be heated, which is made of water, a fluid mainly composed of water, or a mixture of these and a solid, and has a sufficiently inferior insulating property compared to air, the gap between the sensing electrodes Through the liquid contents that exist between
Electricity conducts, and since the gap between the ignition discharge electrodes is smaller than the gap between the avoidance discharge electrodes (that is, the ignition discharge electrodes have lower electrical resistance), a spark is generated by a discharge 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, if the container with a heating function is not filled with contents, does not have a predetermined amount of contents, or is filled only with dry materials, it is possible to prevent the container from igniting inadvertently. Even when the operation is performed, the heating element does not generate heat, and is configured so that heating is performed only when a predetermined amount of an appropriate amount of contents is filled.

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

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

Further, a heat insulating body 4 is provided below the ignition part 6, and a recess 4a for accommodating ignition discharge electrodes 9, 9, which will be described later, is provided at the upper central part of the heat insulating body 4, and a recess 4a for accommodating ignition discharge electrodes 9, 9, which will be described later, is provided in the central part. ,
Through hole 4b into which support member 9a that supports poles 9, 9 is fitted
are each formed.

Furthermore, a power generation board 14 is disposed below this heat insulator 4, and a through hole 1 formed in the center of this power generation board 14 is provided.
A support member 9a that supports an ignition discharge electrode 9.9 is inserted and fitted through the through hole 4b of the heat insulator 4 and the ignition discharge electrode 9.9, and the ignition discharge electrode 9.9 is accommodated in the recess 4a of the heat insulator 4. .

In addition, as shown in FIGS. 1 and 2, the power generation board 14
A piezoelectric element 7 is supported above via a support member 7a so as to be parallel to a line passing through the center thereof.

Furthermore, in order to give a blow to one end 7b of the piezoelectric element 7, the hammer member 8 is inserted into the supporting member 1 via the leaf spring 13.
3a, it is fixed on the power generation board 14 so as to be perpendicular to the line passing through the center.

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

Then, the ignition discharge electrode 9.9 and the sensing electrode 11 are connected in series and the avoidance discharge electrode 10 is connected in parallel via the conductive wire 15 so as to constitute an electric circuit as shown in FIG. These are connected to the positive and negative electrodes of the piezoelectric element 7. Note that the ground shown in FIG. 3 is connected at an appropriate location on the container body 1, and the container body 1 itself is
and the other end (other pole) of the sensing electrode 11.

Further, as shown in FIGS. 1 and 5, a bottom 1'16 is rotatably attached to the bottom of the container body 1,
At the center of E16, a ratchet gear 21 having teeth 21a formed in one direction on its inner periphery is fixed to the bottom cover 16 by a fixing member 21b. A ratchet pawl 20 is mounted inside this ratchet gear 21 so as to be rotatable about the center of the bottom cover 16 about an axis 16a. The ratchet pawl 20 has a plurality of protruding pawls 20a, and the pawls 20a are the teeth 2 formed on the inner periphery of the ratchet gear 21.
1a (see Figure 4).

Further, a trigger member 12 is fixed to the upper center portion of the ratchet pawl 20. The trigger member 12 has a plurality of protrusions 12a formed radially, and when the trigger member 12 rotates, the protrusions 12a engage with one end 13b of the leaf spring 13 of the hammer member 8. It is constructed as follows (see Figure 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, the
When the bottom cover 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 116, and the teeth 21a formed on the inner periphery of the ratchet gear 21 rotate. It engages with a plurality of pawls 20a protruding from the ratchet pawl 20 (see FIG. 4). As a result, the ratchet pawl 20 also rotates in the E direction, and the trigger member 12 fixed to the ratchet pawl 20 also rotates in the same direction.

Furthermore, as the trigger member 12 rotates, one of the protrusions 12a of the trigger member 12 engages with one end 13b of the leaf spring 13 to which the hammer member 8 is attached, and as a result,
The leaf spring 13 is bent in a direction separating it from the piezoelectric element 7. When the bottom cover 16 is further rotated, the engagement between the protruding portion 12a of the trigger member 12 and the one end 13b of the plate spring 13 is released, and the elastic force of the plate spring 13 causes the hammer member 8 to close to the one end 7b of the piezoelectric element 7. The piezoelectric element 7 is configured to apply a striking force to generate a high voltage across both ends of the piezoelectric element 7 (see FIG. 2). Therefore, when igniting, it is possible to easily ignite by simply turning the bottom cover lightly.

On the other hand, when the bottom cover 16 is rotated in the opposite direction to the arrow E in FIG. 2, that is, clockwise in FIG. When engaged, the hammer member 8 is urged in the direction of the piezoelectric element 7, but since the piezoelectric element 7 is fixed to the power generation board 14, the trigger member 12 cannot rotate any further. Therefore, the force of further rotating the bottom 116 in the clockwise direction causes the pawl portion 20 of the ratchet pawl 20 to
The teeth 21a of the ratchet gear 21 are bent and engaged.
The bottom cover 16 is disengaged from the trigger member 12 and rotates idly, so that the rotation of the bottom cover 16 is not transmitted to the trigger member 12 (see FIG. 4). Therefore, even if the bottom cover 16 is rotated in the opposite direction by mistake, excessive force will not be applied to the trigger member 12, hammer member 8, piezoelectric element 7, etc. or their attachment parts, and when transporting the container, etc. This prevents ignition caused by vibrations, etc., and prevents damage due to misuse.

In addition, the sensing electrode 11 is covered with a high insulation strength coating, preferably an insulation coating 22 made of synthetic resin, and is inserted almost vertically from between the power generation board 14 and the container body 1 near the inside of the container body l. , is erected up to the vicinity of a predetermined water level line 18. The tip of the sensing electrode 11, that is, the exposed portion 17 of the sensing electrode is formed to be shorter than the insulating coating 22, and the concave portion of the tip formed thereby is filled with a hydrophilic member 19 having a capillary action such as hydrophilic felt. is filled.

Therefore, even if the tip 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 is insulated from the container body 1. The distance from the exposed portion 17 to the container body 1 via the hydrophilic member 19 is sufficiently large. In other words, the exposed portion of the sensing electrode 11 The insulation resistance between the sensing electrode 17 and the container body 1 is configured to be sufficiently larger than the insulation resistance between the avoidance discharge electrode 10 provided on the power generation board 14 and the container body 1. In other words, the sensing electrode 11 The distance from the exposed portion 17 to the container body 1 via the hydrophilic member 19 is configured to be sufficiently larger than the distance between the avoidance discharge electrode 10 and the container body 1.

Therefore, if the content 2 is not filled inside the container body 1, or if a predetermined amount of the content 2 does not exist (i.e., if the content 2 is not filled up to the water level line 18)
, or when only dry material is filled and the ignition operation is performed, discharge sparks are generated between the avoidance discharge electrode 10, which has low insulation resistance, and the container body 1, and the ignition discharge electrode 9.
Since no electricity is applied to the heating element 9, the heating element 5 will not be ignited.

On the other hand, the gap between the ignition discharge electrodes 9 and 9 is the avoidance discharge electrode 10.
Since the gap between the container body 1 and the container body 1 is smaller than the gap between When the content 2 made of a material with poor quality is filled up to the water level line 18, the hydrophilic member 1 filled at the tip of the sensing electrode 11
Through capillary action, a portion of the contents 2 penetrates through 9 to the exposed portion 17 . 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, discharge sparks occur in the gap between the ignition discharge electrodes 9, which have low insulation resistance. occurs. As a result, the ignition section 6 and the heating element 5 are ignited in sequence, and heat generation begins.

In addition, the tip of the ignition discharge electrode 9.9 is coated with metal powder such as iron, cobalt, nickel, or zirconium, or an alloy powder thereof, or a so-called ignition alloy (for example, an alloy in which iron, nickel, or copper is added to Mitsushmetal, etc.). If a powder of lanthanum, alloys of magnesium, lead, tin, etc., vanadium-iron alloys, etc.) is applied in advance, the ignition discharge electrode 9.
When the discharge spark 9 is generated, the tips of the ignition discharge electrodes 9, 9 are ignited, and it becomes possible to ignite the ignition part 6 and the heating element 5 in sequence more easily and reliably.

In addition, as in the past, the conductive wire 15 and the avoidance discharge electrode lO provided on the power generation base trIi 14 can be press-molded with conductive wire covered with polyvinyl chloride, polyethylene, polypropylene, polyamide, fluororesin, etc., or phosphor bronze, etc. Of course, it is also possible to use a conductive material such as carbon or aluminum with an adhesive and apply it directly to the power generation board 14, or a conductive material such as metal foil to the power generation board 14. By pasting it directly on
It is possible to construct it more cheaply and easily.

Furthermore, JP-A-2-7918 and JP-A-1-288
As disclosed in No. 218, the heating element 5 includes an oxidizing agent made of a metal oxide such as iron oxide, copper oxide, or lead oxide;
The oxidizing agent is appropriately selected and prepared from a combustible agent consisting of a metal such as titanium or iron, or a semimetal such as silicon, which has a higher oxidation heat than the metal forming the oxidizing agent, and the ignition part 6 is prepared using barium peroxide, oxidized If prepared by appropriately selecting an oxidizing agent such as copper or strontium peroxide and a combustible agent such as magnesium, aluminum, calcium, or boron,
It is possible to improve ignition performance, caloric efficiency, and heating rate.

Furthermore, the heat insulator 4 may be any heat insulating material that has excellent adsorption properties for odors, gases, etc. that are slightly generated during ignition and heat generation, and zeolite is a suitable example.

The above-mentioned embodiment merely describes a preferred embodiment of the present invention, and those skilled in the art can easily make changes and modifications, so unnecessary limitations should not be attached to the present invention. The scope should be limited only by the following claims.

(Effects) According to the present invention, if the heating container is not filled with any content, if only dry material is filled, or even if the predetermined amount of content is not filled, Ignition and heat generation are possible only when a predetermined amount of the heated substance is filled, which does not ignite or generate heat and can sufficiently absorb the heat of a heat generating element made of water, a fluid containing water as a main component, or a mixture of these and a solid. A container with a heating function that can generate heat can be provided.

Therefore, as with conventional technology, we provide an extremely safe and convenient container with a heating function that can reliably ignite and generate heat with simple operations, and will not ignite due to misuse or vibration during transportation. This is an excellent invention that has many functions and effects.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the heating function container of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. 4 is a sectional view taken along line B-B in FIG. 1, and FIG. 5 is a sectional view taken along line C in FIG. 1.
- It is a longitudinal cross-sectional view along the C line. DESCRIPTION OF SYMBOLS 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... Avoidance discharge electrode, 11... Sensing electrode, 12... Trigger member, 13... Leaf spring,
14... Power generation board, 15... Conductor, 16... Bottom cover, 17... Exposed part, 18... Water level line, 19...
Hydrophilic member, 20... Ratchet pawl, 21... Ratchet gear, 22... Insulating coating.

Claims (14)

[Claims] (1) Equipped with a heating function that is equipped with a heating element for heating a substance to be heated consisting of water, a fluid mainly composed of water, or a mixture of these and a solid, and an ignition mechanism for causing the heating element to generate heat. A container, wherein the ignition mechanism includes a piezoelectric element that generates electricity by 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 inside the container. a sensing device that senses whether or not the heating element is present, and when the sensing device senses that a predetermined amount of the substance to be heated is filled inside the container, the electricity generated by the piezoelectric element is discharged to dissipate the heating element; an ignition discharge device that generates heat by ignition, and a position separated from the heating element to which the electricity generated by the piezoelectric element is transmitted when the sensing device does not detect that a predetermined amount of the substance to be heated is filled inside the container. A container with a heating function, comprising: an avoidance discharge device that causes a discharge to occur; and a container with a heating function. (2) The container with a heating function according to claim 1, wherein the piezoelectric element, the sensing device, the ignition discharge device, and the avoidance discharge device are electrically connected to each other. (3) The piezoelectric element, sensing device, ignition discharge device, and avoidance discharge device are electrically connected to each other by attaching a conductive material to a substrate made of an insulating material. The heating function container according to claim 2. (4) the ignition discharge device and the sensing device are connected in series;
The heating function according to claim 2 or 3, characterized in that an electric circuit connected to the positive electrode and the negative electrode of the piezoelectric element is constructed by connecting these and the avoidance discharge device in parallel. container. (5) The container with a heating function according to any one of claims 1 to 4, wherein the ignition discharge device, the avoidance discharge device, and the sensing device are configured so that discharge becomes difficult to occur in this order. (6) The sensing device is composed of a sensing electrode, the ignition discharge device is composed of an ignition discharge electrode, and the avoidance discharge device is composed of a avoidance discharge electrode. 5. The container with a heating function according to any one of 5. (7) The container with a heating function according to claim 6, wherein the distance between the gaps between the electrodes increases in the order of the ignition discharge electrode, the avoidance discharge electrode, and the sensing electrode. (8) The heating function according to claim 6 or 7, wherein the ignition discharge electrode is coated with an ignitable substance that is relatively easy to ignite, and the ignition discharge electrode itself has an ignition function. container. (9) The container main body and/or the container accommodating the heating element of the container with a heating function is formed of a conductive material, and the container body and/or the container accommodating the heating element is connected to the sensing electrode and/or the avoidance discharge electrode. The container with a heating function according to any one of claims 6 to 8, characterized in that the container has one pole. (10) The sensing electrode is covered with an insulating coating, and the sensing electrode is configured to communicate with the outside of the insulating coating through a material having capillary action. 9. The container with a heating function according to any one of 9. (11) The container with a heating function according to any one of claims 1 to 10, wherein the pressure applying device is configured to apply impact pressure to the piezoelectric element using a hammer member. (12) The hammer member engages with the protrusions by rotation of the trigger member, which has a plurality of protrusions protruding radially from the rotating shaft, and the hammer member applies impact pressure to the piezoelectric element. The container with a heating function according to claim 11, wherein the container is configured to provide a heating function. (13) A rotatably supported ratchet pawl is disposed approximately at the center of the bottom cover that fits into the bottom of the container body, and the trigger is fixed to the ratchet pawl, and a ratchet pawl that engages with the pawl of the ratchet pawl is provided. A ratchet gear having teeth in one direction on the circumference is fixed to the bottom cover, so that when the bottom cover is rotated in the opposite direction, the ratchet pawl will idle and the trigger member will not rotate. The heating function container according to claim 12. (14) The heating element is composed of a heating agent and an ignition agent that is arranged in contact with the heating agent and is easier to ignite than the heating agent that is arranged near the ignition discharge device. A container with a heating function according to any one of claims 1 to 13.