JPH0640477A - Heating can - Google Patents

Abstract

PURPOSE:To mix together different contents in a can by a method wherein the different contents are separately contained therein and kept separated even upon heating in the sterilization process and, when the can is heated for use, the contents are released from their separated condition and mixed together. CONSTITUTION:Liquid contents 20 and a capsule 5 are sealingly contained in a heat resisting can 6c having an opening part 6a formed on its top part. The capsule consists of a case 5a containing therein the other contents and a content closing member 5b adapted to open when the difference between the inner and outer pressures becomes at least a predetermined value and, when the can is opened and heated, the closing member is released from its closing condition by the expansion of gas inside the capsule.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating canned product which directly heats the contents together with the can body during use.

[0002]

2. Description of the Related Art Conventionally, canned foods have been used for preserved foods, and when the contents are cooked by heating, the lid of the canned food is opened to take out the contents. Further, the contents are contained in a mixed state without being divided.

[0003]

However, since the contents are mixed in advance in the above-mentioned canned food, the commercial value can be improved by mixing the mixture at the time of heating as compared with the case of simply heating the mixture. In some cases, conventional canned food cannot meet the above requirements.

Further, the inside of the can is partitioned by a partition member that melts when the temperature rises, the contents are separated and accommodated, and the partition member is melted to release the partition when heated. Although canned can be considered, the contents are sealed and then heat-treated at a temperature and time according to the contents for sterilization. Depending on the type of contents, the compartment is released during heat sterilization. There is a risk that

In view of the above circumstances, it is an object of the present invention to provide a canned food for heating, in which the contents of the canned food are separated and stored even after the sterilization step, and the separated state can be released during heating and use. It is a thing.

[0006]

A heating can according to the present invention which solves the above-mentioned problems contains a liquid content such as water inside a heat resistant can body having an opening at the top thereof, and A capsule body is formed by sealing a case containing other contents with a closing member that opens when the pressure difference between the inside and the outside exceeds a predetermined value. According to the expansion of the gas inside the capsule body, the closing member is opened to release the sealing.

Further, it is preferable that the capsule body is constructed by slidably fitting a lid-like closing member in a cylindrical case via a seal member.

Further, a mesh member may be arranged inside or outside the capsule body.

[0009]

As described above, in the canned food for heating according to the present invention, the heat-resistant can body contains the liquid content such as water, and the case containing the other content is sealed with the closing member. By encapsulating the capsule body, the contents are contained in a separated state, and when the content is sealed and heat sterilization is performed in an unopened state, the heating causes the internal pressure of the capsule body to rise. The increased internal pressure of the can body acts on this capsule body to pressurize it, so that the pressure difference between the inside and outside is small and the closing member maintains the sealed state of the case without opening operation. Even in the case, the contents are stored in a state where the separation is secured.

On the other hand, when the can is heated in an opened state during use, the internal pressure of the can body does not rise even if the temperature rises to the atmosphere and the temperature rises, while the capsule body responds to the temperature rise. When the internal gas expands to increase the internal pressure and the internal / external pressure difference is heated to a predetermined value or more, that is, a predetermined temperature, the closing member is opened to release the sealed state of the capsule body, and the contents and the liquid contents are Are mixed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a canned food for heating according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the basic structure of a canister with a burner using a canned food for heating according to one embodiment, and FIG. 2 is a partially cutaway perspective view showing an example of its appearance.

[0012] In the canned product with a burner, a cylindrical outer case 2 which is basically open at least at the upper end thereof, and a gap 4 in which combustion gas rises are formed between the outer case 2 and the outer case 2 inside the upper case. 6a, which is accommodated and fixed in the upper end surface.
A heating can 6 composed of a cylindrical heat-resistant can body 6c having a lid 6b having (a tab for opening the lid), and an ignition means housed and fixed inside the lower part of the outer case 2 so as to heat the can 6. And a fuel tank 12 fixed inside the lower part of the outer case 2 so as to supply fuel to the burner 10. The outer case 2 includes the burner 10.
The vent 10 is provided with a vent 2a for supplying external air, and an opening 2b for operating the ignition means 8 from the outside.

Further, the ignition means 8 in the outer case 2
The opening 2b for operating the burner 10 from the outside is further provided with a scale for confirming the amount of residual fuel in the window 14 and the fuel tank 12 so that it is possible to confirm from outside whether the flame of the burner 10 is burning. It has a window 16 (see FIG. 2).

The heating can 6 has a heat-resistant can body 6c in which a liquid content 20 (for example, water, drinking liquid, etc.) and a capsule body 5 are contained. In addition, as shown in FIG. 4, powdery or solid contents 21 (for example, instant coffee, soup stock, tea bags, tea leaves, noodles, etc.) are contained and sealed inside the capsule body 5. There is.

The capsule body 5 is constructed such that a closing member 5b made of a tubular cap is slidably fitted in a sealed state on the outer periphery of an opening of a tubular case 5a forming a housing portion for the contents 21. 21 and a predetermined amount of gas (air, etc.) are sealed. The closing member 5b is set to open when the pressure difference between the inside and the outside becomes a predetermined value or more due to expansion of the gas sealed inside.

That is, a seal member 5c (for example, an O-ring) is interposed between the case 5a and the closing member 5b to ensure the airtightness between them, and the fitting strength and fitting thereof. The amount sets the temperature during the opening operation. In other words, the fitting length of the closing member 5b in the capsule body 5 is such that the capsule body 5 is at a predetermined temperature (eg
When heated to 90 ° C., the occluding member 5b slides due to the expansion of the gas inside the capsule body 5 to separate from the case 5a and release the seal.

A ring-shaped rubber packing 5d is provided at the bottom of the closing member 5b with which the tip of the case 5a can come into contact.

On the other hand, there is formed a gap 4 between the outer peripheral surface of the outer case 2 and the can body 6c of the can 6 with which the combustion gas rises.
And a means for fixing the can body 6c are also provided. That is, as shown in a horizontal cross section in FIG. 3, a vertically extending corrugated partition plate 9 is provided between the outer case 2 and the can body 6c. The corrugated partition plate 9 is shown in FIGS. As shown, it is formed so as to extend below the lower end of the can body 6c. At this time, the partition plate 9 has a function of fixing the both, and the space 9a inside the corrugated shape of the partition plate 9 becomes the gap 4 in which the combustion gas rises. The partition plate 9 may have a corrugated shape including a curved surface portion as shown in the figure, or may have a triangular wave shape bent in a planar shape.

As the ignition means 8 of the burner, it is practically preferable to employ a piezo type automatic ignition device because of its simplicity. Further, it is desirable for safety that the burner 10 is equipped with a safety device that automatically shuts off the fuel supply to the burner 10 when the flame is extinguished.

To explain the operation of the above embodiment, the canned product 6 immediately after the liquid content 20 and the capsule body 5 are enclosed is shown in FIG.
As shown in (A), the internal pressure of the can body 6c and the internal pressure of the capsule body 5 are about 1 atm, the closing member 5b of the capsule body 5 is in the initial state of sealing, and the liquid content 20 and the solid content are twenty one
And are separated.

FIG. 5 (B) shows a heating state in the sterilization process, in which the can body 6c of the canned product 6 is in an unopened and sealed state, and the internal pressure of the can body 6c increases in accordance with the temperature rise and the vapor pressure of the internal gas increases. Due to the increase, for example, at a sterilization temperature of 110 ° C, the internal pressure becomes about
It rises to 2.7 bar. Similarly, in the capsule body 5, the internal gas expands due to the temperature rise, but the closing member 5b slides toward the compression side so as to receive the internal pressure of the can body 6c and conversely reduce the internal volume. The internal pressure of the capsule body 5 is about 1.3 atm. The heating temperature in the sterilization step is the content 2
Depending on 0 and 21, when the heating temperature is high, the movement amount of the closing member 5b in the contracting direction becomes large, and the opening end thereof is pressed against the rubber packing 5d.

FIG. 5 (C) shows a storage state in which it is cooled to room temperature after being heated in the above sterilization step, and is in the same state as in FIG. 5 (A). The closing member 5b of the capsule body 5 slides in the expanding direction in accordance with the decrease,
The sealed state of the capsule body 5 is maintained, the internal pressure of both is lowered to about 1 atm at room temperature, and both contents 20 and 21 are stored in a separated state.

On the other hand, when the canned product 6 is used, as shown in FIG. 5 (D), first, the unsealing portion 6a is operated before heating to open the can body 6c of the canned product 6 and the upper space thereof is opened. Open to the atmosphere. Then, the flame is ignited and ejected from the burner 10 to directly heat from the bottom of the can body 6c, but since the lower end of the partition plate 9 is formed lower than the bottom of the can body 6c, The hot air generated by the flame of the burner 10 is located inside the partition plate 9 and faces the peripheral wall of the can body 6c.
The temperature of the outer case 2 is suppressed while the can 6 is efficiently heated by raising only the temperature (see FIG. 3).

The liquid contents 20 are heated by the above burner 10.
When the temperature of the capsule body 5 rises, the temperature of the capsule body 5 also rises, and the gas sealed in the capsule body 5 thermally expands to raise the internal pressure to about 1.3 at 90 ° C. However, since the increased internal pressure of the can body 6c does not act like during sterilization heating, the closing member 5b of the capsule body 5 slides toward the expansion side as the internal pressure rises and is heated to about 90 ° C. In this state, the closing member 5b is disengaged from the case 5a and the sealed state of the content 21 is released, and the liquid content 20 flows into the case 5a for mixing.

6 to 9 show modified examples of the capsule body. First, the capsule body 25 shown in FIG.
The case 25a for accommodating the contents 21 has a cylindrical shape, and a closing member 25b formed of a disc-shaped plug body is provided on the inner circumference of the opening of the case 25a and a seal member 25c (for example, an O-ring) is provided on the outer circumference thereof. It is provided in such a structure that it is slidably fitted in a state where airtightness is secured and the content 21 and a predetermined amount of gas (air or the like) are sealed. The closing member 25c slides due to the expansion of the gas sealed inside when the closing strength of the closing member 25c is heated to a predetermined temperature due to the fitting strength and the fitting amount and the pressure difference between the inside and outside becomes a predetermined value or more. Is set to open.

In the capsule body 26 shown in FIG. 7, a case 26a for accommodating the contents 21 is cylindrical, and a mesh member 26d is provided at its opening to prevent the contents 21 from diffusing to the outside. Suitable for storing tea leaves, etc. Also, the above case
A cylindrical cap-shaped closing member 26b is fitted to the outer peripheral portion of 26a via a sealing member 26c to seal the contents 21 and a predetermined amount of gas (air, etc.) while ensuring airtightness. It is provided in the structure. Then, the closing member 26
b is set to slide and open due to the expansion of the gas sealed inside when the internal pressure and the external pressure difference exceed a predetermined value due to the fitting strength and the fitting amount. Has been done.

The case 26a and the closing member in this example
26b are all formed in a container shape and slide relative to each other, either of which may be referred to as a case, and the contents 21 are accommodated in the bottom of the closing member 26b. It may be provided so as to be covered with a mesh member.

In the capsule body 27 shown in FIG. 8, a case 27a for accommodating the contents 21 has a cylindrical shape, and a closing member formed on the inner periphery of the opening of the case body 27a is a ball-shaped stopper made of an elastic member such as rubber. 27b is fitted with airtightness and contents 21
And a predetermined amount of gas (air or the like) is sealed. The closing member 27b slides due to the expansion of the gas sealed inside when it is heated to a predetermined temperature by the fitting strength and the fitting amount and the pressure difference between the inside and the outside becomes a predetermined value or more. Is set to open.

Further, in the capsule body 28 shown in FIG. 9, the case 28a for accommodating the contents 21 has a cylindrical shape, and the closing member formed on the inner periphery of the opening portion by a resilient member such as rubber into a plug body.
28b is fitted in a state where airtightness is ensured, but this closing member 28b has a concave portion formed in the middle part to further store other contents 22, and the upper and lower edges Is in contact with the inner surface of the case 28a to maintain an airtight state, and is provided with a structure in which the two kinds of contents 21 and 22 and a predetermined amount of gas (air or the like) are sealed. And, the closing member 28b,
Depending on the fitting strength and the fitting amount, it is set to slide and open due to the expansion of the gas sealed inside when heated to a predetermined temperature and the pressure difference between the inside and the outside exceeds a predetermined value. .

The shape and size of each capsule body may be appropriately changed in design depending on the amount and shape of the contents 21.

Next, FIGS. 10 to 13 show an example of storing the capsule body in the can body 6c, which is a mesh member for preventing the contents 21 (mainly tea leaves etc.) stored in the capsule body from spreading or flowing out. Has been installed.

In the example of FIG. 10, a holding member 31 for accommodating and holding the capsule body 5 (other capsule bodies other than the example of FIG. 7) is provided on the upper portion of the can body 6c, and the holding members 31 above and below the holding member 31 are provided. The surface is formed by the mesh members 31a and 31b. Then, when the can body 6c is opened and heated, the closing member 5b of the capsule body 5 is opened due to the temperature rise, the liquid content 20 flows into the capsule body 5, and the content 21 such as tea leaves becomes a capsule body. 5 tries to diffuse out to the entire liquid content 20 but is blocked by the lower mesh member 31b, and when pouring the liquid content 20 from the can body 6c, the upper mesh member 31c
31a prevents the contents 21 such as tea leaves from flowing out.

In the example shown in FIG. 11, a holding member 32 for accommodating and holding the capsule body 5 (other capsule bodies other than the example shown in FIG. 7) is provided at the bottom of the can body 6c. The surface is formed by the mesh members 32a and 32b, and its action is the same as that of the example of FIG.

In the example of FIG. 12, the capsule body 5 (other capsule bodies other than the example of FIG. 7 may be stored in the liquid content 20 in a standing state, and the mesh is formed by covering the upper opening of the can body 6c. A member 33 is provided, and contents 21 such as tea leaves are ejected from the opened capsule body 5 and diffused throughout the liquid content 20, and when pouring the liquid content 20 from the can body 6c. The mesh member 33 prevents the contents 21 such as tea leaves from flowing out.

In the example of FIG. 13, the capsule body 26 having the mesh member 26d therein is housed as shown in FIG. 7, and the can body 6c has the closing member 26b of the capsule body 26 on the upper part thereof. A holder 34 for holding the case is provided, and when the capsule body 26 is opened in response to heating, a case is opened.
The liquid content 220 flows into the case 26a by dropping the 26a, and the content 21 in the case 26a is prevented from diffusing by the mesh member 26d.

The case and the closing member in each of the above-mentioned embodiments are molded from a metal such as aluminum or a heat-resistant plastic, and the timing of the opening operation depends on the difference in the thermal conductivity of the materials. It is different.

That is, even if the temperature setting during the opening operation is the same, when the capsule body is made of a metal such as aluminum, it has high thermal conductivity, so that the capsule body is linked to the temperature rise of the liquid content. The temperature of the internal gas also rises at an early stage, and the closing member opens with a small delay after the liquid content reaches the set temperature, and the sealed state is canceled before the liquid content boils, for example. On the other hand, in a capsule body formed of plastics or the like having low heat conductivity, the temperature rise of the internal gas is delayed with respect to the temperature rise of the liquid content, and even if the liquid content reaches the set temperature, a certain delay time is reached after that. The opening operation is performed after a lapse of time, and the closed state is released after the liquid content is boiled, for example. Based on this characteristic, it is possible to select the material of the capsule body according to the type of contents and the like to obtain the desired unsealing characteristic.

The canned food for heating according to the present invention has a wide range of applications, and as described above, the size and material of the capsule body are changed so that the contents can be other beverages such as coffee, tea and milk. , Noodles such as cup ramen, miso soup,
It can also be applied to foods such as soups.

[0039]

EFFECTS OF THE INVENTION In the canned food for heating according to the present invention, in the unopened storage state until heating, even after the sterilization process, the contents are contained in a separated state by the capsule body including the case and the closing member, and the can body is opened. In this heating state, the capsule body is released from the closed state by the opening operation of the closing member due to the increase of the internal pressure so that the contents are mixed, so that the storage state and the heating state suitable for the contents can be easily obtained. It is a thing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the basic structure of a can with a burner using a can for heating according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing an example of the external appearance of the canister with a burner shown in FIG.

FIG. 3 is a schematic horizontal cross-sectional view showing a structural example between the outer case and the can of the can with burner in FIG.

FIG. 4 is a sectional view of the capsule body in FIG.

FIG. 5 is an explanatory view showing each operating state of the heating can.

6 to 9 are sectional views showing modified examples of the capsule body, respectively.

10 to 13 are explanatory views showing an example of storing the capsule body in the can body.

[Explanation of symbols]

 5,25 ~ 28 Capsule 5a, 25a ~ 28a Case 5b, 25b ~ 28b Closing member 6 Heating canned product 6a Opening part 6c Can body 20,21,22 Contents

Claims (3)

[Claims] 1. A case in which a liquid content such as water is accommodated in a heat-resistant can body having an unsealed portion formed in the upper portion thereof, and a case in which another content is accommodated therein has a difference in internal and external pressures of a predetermined value or more. A capsule body that is closed by a closing member that opens when the temperature rises is enclosed in the can body, and the closing member opens according to the expansion of the internal gas of the capsule body when the can body is heated in the opened state. Canned food for heating, which is characterized by releasing the airtightness. 2. The heating can according to claim 1, wherein the capsule body is formed by fitting a lid-like closing member slidably into a cylindrical case via a seal member. 3. The canned food for heating according to claim 1, wherein a mesh member is provided inside or outside the capsule body.