JPH08228936A - Portable heating box - Google Patents

Abstract

PURPOSE: To provide a portable heating box which is free from such danger as heat generation at the time of carrying, is safe without danger of having a burn by steam during use, is reusable by replacing a heating element and is cost effective. CONSTITUTION: The heating element formed by packing an exothermic agent 13 which generates heat when hydrolyzed into a non-woven fabric bag is housed into the inside bottom of a box 1 which consists of a blank having heat resistance and water resistance and is openable and closable in the upper part. In addition, the box 1 is freely openably and closably provided with a water injection port 5 for injecting water in the lower part of its side face. The bag of the heating element is formed of a non-woven fabric of 50 to 55 meshes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable heating box in which foods and drinks are placed in a box and heated by the exothermic reaction of chemical substances.

[0002]

[Prior art and its problems] Quick heating lime is packed in a heating container that heats foods and drinks such as lunch boxes and beverages by using reaction heat of chemical substances stored inside without using electricity or gas. A water-permeable bag and a bag containing water were provided in the lower part of the container, and at the time of heating, the water bag was broken and the quicklime was reacted with water to generate heat, and the bento, beverage, etc. were heated by this reaction heat.

In such a conventional heating container, there is a risk that the water bag may be broken and heated during transportation, and most of the conventional heating containers are integrally formed with a lunch box or a beverage can. Could not be reused.

There is also a heating container of a type in which a heating element filled with quicklime is put in a container with a lid and water is heated during use to generate heat. There was a risk that the user could get burned when pouring water or closing the lid.

The present invention has no risk of heat generation during transportation, is safe without the risk of being burned by steam during use, and is economical because it can be reused by replacing the heating element. The purpose is to provide a portable heating box.

[0006]

In order to achieve the above object, the portable heating box of the present invention is made of a material having heat resistance and water resistance, and heat is generated by adding water to the inner bottom of the box whose upper part can be opened and closed. A heating element filled with a heat-generating agent in a non-woven bag is stored, and a water injection port for injecting water is provided at the lower part of the side surface of the box body so as to be openable and closable.
Further, the heating element bag is made of a non-woven fabric of 50 to 55 mesh.

[0007]

[Function] When the object to be heated is put in the box and placed on the heating element, the upper lid of the box is closed and water is injected from the water inlet, the water penetrates into the heating element from the entire circumference of the heating element, The exothermic agent and water react to generate heat.

A part of the injected water evaporates due to heat generation and becomes steam, which fills the box body and is convected. The object to be heated in the box body is effectively heated from all directions by the heat directly transmitted from the heating element and the steam convection in the box body.

Further, in the heating box of the present invention according to claim 2, since the bag of the heating element is made of non-woven fabric of 50 to 55 mesh, the injected water gradually penetrates into the heating element and is poured into the pouring water. There is no steam coming out of the water outlet, and it can be used safely.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of a portable heating box according to the present invention will be described in detail below with reference to the accompanying drawings. In the figure, reference numeral 1 is a box body which is the body of a heating box, 2 is a water receiving tray laid on the inner bottom of the box body and receives water for exothermic reaction, and 3 is heat generation for heating contained in the water receiving tray. A body, 4 is a tray on which an object to be heated is placed, and 5 is a water injection port for injecting water for exothermic reaction into the box.

The box body 1 is a foldable type made of a material having heat resistance and water resistance, and uses, for example, cardboard mixed with aluminum powder.

An assembling type handle portion 7 is provided on the upper lid portion 6 of the box body 1. The handle portion 7 is a front and rear lid piece 8 of the box body.
The left and right end portions of the handle pieces 8a, 8a formed in 8 are fitted into the long holes 10, 10 of the locking tongue pieces 9a, 9a formed in the left and right lid pieces 9, 9 of the box body to be assembled. The object to be heated is taken in and out by opening the handle 7.

Further, between the left and right lid pieces 9 and 9 of the upper lid 6 and the front and rear lid pieces 8 and 8, the same heat resistance and water resistance as those of the box body 1 are provided so that heat inside the box does not escape from the gaps of the upper lid section. An inner lid 11 made of cardboard is sandwiched.

The water receiving tray 2 laid on the inner bottom of the box 1 is the box 1
The same heat-resistant and water-resistant cardboard is used, and a notch 2a is formed on the upper side of the water injection port 5 side (left side in FIG. 3) surrounding the lower side of the water injection port.

The heating element 3 has a fine mesh of 50 to 55 mes.
In the bag 12 made of the non-woven fabric of h, the exothermic agent 13 that generates heat by water addition is packed, and this exothermic agent 13 contains, for example, 87 to 92% of quick lime that generates heat due to water addition, and suppresses the exothermic reaction and A mixture obtained by adding a trace amount of a catalyst to a mixture of anhydrous magnesium chloride 13 to 8% for increasing the durability and suppressing the expansion of quick lime is used.

The tray 4 on which the article to be heated 14 is placed is made of aluminum, and the outer circumference of the tray is slightly smaller than the inner circumference of the box body 1. Between this tray outer circumference and the box inner circumference. The vapor during the exothermic reaction flows from the bottom of the tray to the top of the tray through the gap.

A water inlet 5 for supplying water for exothermic reaction to the heating element 3 is provided below the left side plate 1a of the box body 1,
This water injection port is provided at the lower part of the left side plate 1a with a door 15 that opens to the lower left with the folding groove 15a as a boundary, and a protective cover 16 with a guide made of a synthetic resin material is attached to this door.
The door 1 is formed between an outer plate 16a having the same size as the door 15 and an inner plate 16b whose upper portion follows the outer plate and is longer than the outer plate.
Water is not soaked from the end of the door by sandwiching 5 and a knob piece 17 for opening and closing the water injection port 5 is provided on the upper part of the cover 16 following the outer plate 16a.

Further, substantially semicircular guide pieces 18, 18 are provided on both sides of the cover 16 toward the inside of the box, and the height and diameter of the door 15 are provided on the guide pieces 18. The same fan-shaped portion 18a and step portion 18b are formed, and the water injection port 5
When is fully opened, the step portion 18b comes into contact with the inner side of the left side plate 1a to serve as a stopper.

The portable heating box of the present invention constructed as described above is used as follows. The upper lid 6 is opened, the object to be heated 14 is placed on the tray 4 in the box body 1, the left and right lid pieces 9, 9 are closed, and the inner lid 11 is covered (in this case, the left and right lid pieces 9,
The locking tongues 9a, 9a of 9 are not closed but are exposed to the outside), the front and rear lid pieces 8, 8 are closed, and the handle pieces 8a, 8a are put up side by side, and the handle pieces 8a, 8a are left and right. The ends are fitted and locked in the long holes 10 and 10 of the locking tongues 9a and 9a.

Next, the knob piece 17 of the water injection port 5 is grasped to open the water injection port, water for exothermic reaction is injected from here, and an amount of water necessary for the reaction is injected and the injection port is closed. The water injected from the water inlet 5 is the inner plate 1 of the cover 16 at the water inlet 5.
6b flows into the water receiving tray 2 and flows around the heating element 3 along the inner wall of the water receiving tray as shown in FIG.

The water that has penetrated into the heating element 3 reacts with the heating agent 13 in the bag 12. This heat is directly conducted from the upper surface of the heating element 3 to the object to be heated 14 via the tray 4, and the steam generated by the heat flows to the upper side of the tray from the gap between the outer circumference of the tray 4 and the inner circumference of the box 1. , The object to be heated 14 is heated by convection in the box.

After a certain period of time has passed, the upper lid 6 is opened to take out the article to be heated 14 from the inside of the box, and the heating element 3 which has finished the reaction is taken out and disposed. The heating box of the present invention is
The heating element 3 after the reaction can be reused by replacing it with a new one.

The graph shown in FIG. 7 shows the difference in temperature change immediately after water injection due to the fineness of the non-woven fabric used for the heating element. In the graph, the solid line indicates the 50 me used in the present invention.
A heating element obtained by filling the sh nonwoven fabric with a heating agent, and a broken line shows the temperature change of a heating element obtained by filling a 40 mesh nonwoven fabric with a heating agent. The composition and amount of the exothermic agent and the amount of water injection were the same in both cases.

In this graph, the conventional heating element reaches a maximum temperature of 80 ° C. about 1 second after pouring water, whereas the heating element used in the present invention reaches a maximum temperature of 110 ° C. about 15 seconds after pouring water.
You can see that it has reached.

This is because not only does it take a long time to reach the maximum temperature because water permeates into the bag little by little when the mesh of the non-woven fabric is fine, but also because water does not permeate immediately, the water becomes a heat generating element. It indicates that the maximum temperature rises because it flows all around and the exothermic reaction effectively occurs from the outer circumference of the heating element.

Therefore, in the heating box of the present invention, it is possible to safely pour water without pouring out high temperature steam from the water spouting port while pouring water, and the heating temperature of the heating element is the same as the conventional one. Since it is higher than that of the object, the object to be heated can be effectively heated.

Although not shown on this graph, the heating element used in the heating box according to the present invention maintains the maximum temperature for about 10 to 15 minutes and returns to room temperature in about 30 to 45 minutes.

In the above embodiment, the box body,
Heat-resistant and water-resistant cardboard is used for the water receiving tray and inner lid, but synthetic resin material may be used as long as it is heat-resistant and water-resistant.

As the tray on which the object to be heated is placed, a sheet formed by laminating aluminum foil may be used depending on the kind of the object to be heated, or may not be used.

[0030]

Since the portable heating box according to the present invention has the above-mentioned structure, the following effects can be obtained.
Since a water injection port is provided on the side of the box and water for exothermic reaction is injected from this water injection port at the time of use,
There is no risk that the water bag will be broken and heated during transportation as in the conventional case, and it can be safely carried.

Further, since the water injection port is of an openable and closable type, steam does not blow out from the water injection port during heating and it can be used safely.

Moreover, the bag of the heating element should be 50 to 55 mesh.
Since it is made of fine mesh non-woven fabric, water gradually penetrates into the heat generating body, and when pouring water, steam does not immediately come out, so it is possible to safely pour water and it is injected. Since the water does not penetrate into the heating element immediately, the water fully spreads around the entire circumference of the heating element, the exothermic reaction in the heating element occurs evenly and the temperature rises effectively, and the maximum temperature rises. The maintenance time will also be longer. Further, it is economical because it can be reused by replacing the heating element.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a portable heating box according to the present invention.

FIG. 2 is a left side view of the above.

FIG. 3 is a vertical sectional front view of the same.

FIG. 4 is a vertical sectional front view showing an enlarged water injection port.

FIG. 5 is a cross-sectional plan view showing the inner bottom surface of the box body.

FIG. 6 is a perspective view showing a state in which an upper lid portion of the heating box according to the present invention is opened.

FIG. 7 is a graph showing a temperature change of a heating element used in a heating box according to the present invention immediately after water injection in comparison with that of a conventional heating element.

[Explanation of symbols]

 1 Box 1a Left side plate 2 Water receiving plate 2a Notch part 3 Heating element 4 Tray 5 Water injection port 6 Top lid part 7 Handle part 8 Front and rear lid part 8a Handle part 9 Left and right lid part 9a Locking tongue 10 Long hole 11 Inner lid 12 Bag 13 Exothermic agent 14 Heated object 15 Door 15a Folding groove 16 Protective cover 17 Knob piece 18 Guide piece 18a Fan-shaped section 18b Step section

Claims (2)

[Claims] 1. A heating element, which is made of a material having heat resistance and water resistance and whose upper part is openable and closable, has an inner bottom that accommodates a heat generating agent that generates heat by adding water in a non-woven bag. Moreover, a portable heating box in which a water injection port for injecting water is provided in the lower part of the side surface of the box body so as to be openable and closable. 2. A heating element, which is made of a material having heat resistance and water resistance and whose upper part can be opened and closed, has an inner bottom, in which a heating agent which heats by heating is packed in a non-woven bag is stored. Moreover, a water injection port for injecting water is provided in the lower part of the side surface of the box body so as to be openable and closable, and the heating element bag is 50 to 55 m
A portable heating box made of esh nonwoven fabric.