JP5840259B2 - Heating bag - Google Patents

Description

  The present invention relates to a heating bag used when food is stored inside and heated with a heating device such as a microwave oven.

  For example, as shown in Patent Documents 1 to 3, it is used when food is stored in a bag body, a zipper provided in the bag body is closed, and the food product is heated with a heating device such as a microwave oven. Plastic heating bags have been put into practical use. The procedure for using the heating bag according to each patent document will be described with reference to the reference numerals in the drawings of each patent document.

  When using the packaging bag according to Patent Document 1, after opening the opening portion 2 of the packaging bag 1 (see FIG. 5 of this document), the food F, seasoning sauce, etc. from the opening 14 formed by this opening Insert A (see FIG. 7 of this document). And the 1st zipper 9 and the 2nd zipper 11 which were provided in the bag body are engaged, the opening part 2 is resealed, and it heats (refer FIG. 8 of this literature). Vapor generated with heating escapes from the packaging bag 1 through the vent 15 and the opening 14 formed in the bag (see FIG. 9 of this document).

  When using the packaging bag according to Patent Document 2, the opening 20 is formed by tearing the first end 4 of the packaging bag 1 (see FIG. 9 of this document), and the food F is put into the packaging bag 1 from this opening. (Refer to FIG. 10 of this document). And the 1st zipper member 6 and the 2nd zipper member 9 are engaged and sealed (refer FIG. 11 of this literature). A stress concentration seal 8A is provided on the first end 4 side (see FIG. 2 of this document). When the internal pressure of the packaging bag 1 is increased by steam accompanying heating and a stress of a predetermined value or more acts on the stress concentration seal 8A, the engagement between the first zipper member 6 and the second zipper member 9 is released, and the internal water vapor Is discharged to the outside (see FIGS. 14 and 15 of this document).

  When using the microwave oven cooking pouch according to Patent Document 3, the zipper is opened and the food is added, and then the zipper is closed and sealed again, and heated in the microwave oven. When the pressure in the pouch 10 rises due to heating, steam is released from the steam release mechanism 17 formed on the surface of the pouch 10.

JP 2009-67446 A JP 2009-166847 A JP 2009-254293 A

  In the packaging bag according to Patent Document 1, the inside and outside of the packaging bag 1 are always in communication with each other through the vent 15 and the opening 14. For this reason, when the food F in the packaging bag 1 is heated, steam always leaks out of the packaging bag 1 and the pressure in the packaging bag 1 does not increase. For this reason, there is a problem that it takes time to heat the food F and the efficiency is low.

  In the packaging bag which concerns on patent document 2, when the pressure in the packaging bag 1 becomes more than predetermined value, the engagement of zipper members will be cancelled | released and water vapor will be discharged | emitted outside, and the explosion of the packaging bag 1 is prevented. On the other hand, once the engagement is released, the pressure in the packaging bag 1 is greatly reduced, and it takes time to heat the food F, resulting in low efficiency.

  The microwave cooking pouch according to Patent Document 3 is kept in a sealed state when heated and the inside of the pouch is pressurized, so that the food F can be heated in a short time, but the size of the steam release mechanism is small. In this case, there is a risk that the pouch may burst without being decompressed smoothly. Conversely, if the size is large, it takes time to heat the food F as in the case of the packaging bag according to Patent Documents 1 and 2, and the efficiency is high. There is a problem that it is low.

  Then, this invention makes it a subject to heat a food efficiently in a short time, preventing that a bag bursts at the time of heating.

  In order to solve the above-described problems, the present invention provides a storage chamber that stores food to be heated, a decompression chamber provided in the storage chamber, and a communication hole that is formed in the decompression chamber and communicates air inside and outside the decompression chamber. And a decompression zipper that freely opens and closes between the storage chamber and the decompression chamber, and when the food is cooked, the decompression zipper is closed, and the steam inside the storage chamber is discharged into the decompression chamber While pressurizing the storage chamber so as not to escape to the side, when the vapor pressure in the storage chamber exceeds a predetermined value, the decompression zipper is opened at that pressure, and a part of the pressure is A heating bag was configured to escape from the communication hole.

  If a decompression chamber is provided in the storage chamber and the decompression zipper is closed and partitioned between the two chambers, steam cannot escape from the storage chamber during heating, so that the pressure in the storage chamber increases. Then, before reaching the bursting pressure at which the bag bursts, the decompression zipper is opened by the pressure so that the pressure in the storage chamber is sufficiently lower than the bursting pressure and sufficiently high for heating the food. Can be quickly lowered to range.

  In addition, a communication hole is formed in the decompression chamber, and vapor is appropriately released from the communication hole, so that the bag body is prevented from rupturing while maintaining a high pressure in the storage chamber even after the decompression zipper is opened. be able to. By maintaining the pressure in this way, the food can be heated in a short time.

  In the above configuration, the internal volume of the decompression chamber when the decompression zipper is opened and the interior of the storage chamber and the decompression chamber is filled with vapor is in the range of 0.1 to 20% of the volume of the storage chamber. It is preferable to adopt a configuration that is within.

  By setting the pressure within the above range, when the decompression zipper is opened, the pressure in the storage chamber can be quickly lowered to a pressure that can avoid the bursting of the bag body. If it is less than 0.1%, sufficient decompression action cannot be obtained when the decompression zipper is opened. Moreover, when larger than 20%, the pressure reduction amount is too large and the pressure required in order to heat food efficiently cannot be maintained.

  In each of the above configurations, the opening area of the communication hole is 0.1 to 10% of the opening area of the storage chamber when the decompression zipper is opened and the interior of the storage chamber and the decompression chamber is filled with steam. It is preferable to set it as the structure which exists in the range.

  By setting the pressure within the above range, the bag body can be prevented from rupturing while maintaining the high pressure necessary to efficiently heat the food after the decompression zipper is opened. If it is smaller than 0.1%, the pressure when the heating is continued after opening the vacuum zipper becomes insufficient, and the bag body may burst. On the other hand, if it is larger than 10%, the escape of steam becomes large, and it takes a long time to heat the food.

  In each of the above configurations, the vacuum chamber further includes an open / close zipper having a sealing force larger than that of the decompression zipper, and the food is stored and taken out by opening / closing the open / close zipper. It is preferable to do this.

  By providing the open / close zipper in this way, there is an advantage that food can be additionally stored in the bag body before heating. The open / close zipper is basically prevented from opening depending on the pressure of the storage chamber and the decompression chamber during heating, but escapes steam from the communication hole due to a large amount of steam generated from the food. However, when the high pressure state continues, the bag can be opened by the high pressure, and the function of preventing the bag body from bursting can be provided.

  In this invention, a storage chamber for storing the food to be heated, a decompression chamber provided in the storage chamber, a communication hole formed in the decompression chamber for communicating air inside and outside the decompression chamber, and the storage chamber A heating bag having a decompression zipper that freely opens and closes the decompression chamber was configured. After the food is stored in the storage chamber, the decompression zipper is closed and the food is heated, and when the pressure in the storage chamber increases due to the steam generated by the heating, the decompression zipper opens at that pressure and the steam in the storage chamber is Escaped to the decompression chamber. This prevents the bag from being ruptured by this pressure. Further, since the vapor is appropriately released from the communication hole formed in the decompression chamber, a high pressure is maintained while preventing the bag body from rupturing, and the food can be heated in a short time.

1 shows a first embodiment of a heating bag according to the present invention, (a) is a front view, (b) is a longitudinal sectional view with a part omitted, and (c) is a side view of a use state. It is a longitudinal cross-sectional view of the principal part which shows the effect | action of the heating bag shown in FIG. 1, Comprising: (a) is the state where the storage chamber was pressurized, (b) is a decompression zipper opening, and vapor | steam escapes from a communicating hole. State The modification of the heating bag which concerns on 1st embodiment is shown, (a) is a front view, (b) is a side view of a use condition. 1 shows a first embodiment of a heating bag according to a reference example (before thermal welding of the upper end), (a) is a front view, (b) is a longitudinal sectional view of the main part, and (c) is a perspective view seen from above. Figure The modification of the heating bag shown in FIG. 4 is shown, (a) is a front view, (b) is a side view of a use state. The 2nd embodiment (before heat welding of a lower end part) of the heating bag concerning a reference example is shown, (a) is a front view, (b) is a perspective view seen from the bottom.

  A first embodiment of a heating bag according to the present invention is shown in FIGS. This heating bag heat-welds the left and right ends of a rectangular front sheet 1 and a back sheet 2 made of a resin material, and a rectangular bottom sheet 3 made of the same material as the front sheet 1 and the back sheet 2. By thermally welding each, the bottom part of the bag body constituted by the front sheet 1 and the back sheet 2 is closed. The bottom sheet 3 is folded between the front sheet 1 and the back sheet 2 when the heating bag is not used (see FIG. 1B).

  The lower side of the bag is a storage chamber 4 for storing food to be heated. A decompression chamber 5 is provided on the upper side of the storage chamber 4, and a decompression zipper 6 is provided between the storage chamber 4 and the decompression chamber 5 to divide the storage chamber 4 and the decompression chamber 5 in an openable and closable manner. It has been. An opening / closing zipper 7 is provided at the upper end of the decompression chamber 5. By opening the opening / closing zipper 7, the decompression chamber 5 is opened, and food can be taken in and out of the storage chamber 4. As the opening / closing zipper 7, one having a sealing force larger than that of the decompression zipper 6 is used. In the decompression chamber 5, one communication hole 8 for communicating the air inside and outside the decompression chamber 5 is formed on each of the front sheet 1 side and the back sheet 2 side.

  When food is stored in the storage chamber 4 and the decompression zipper 6 and the opening / closing zipper 7 are closed, the bottom sheet 3 is developed with the weight of the stored food, and the bag body can be stably made to stand by this bottom sheet 3. (See FIG. 1 (c)). For this reason, even if liquid food is stored in the storage chamber 4, there is no possibility that the food leaks from the opening of the bag.

  When food is stored in the storage chamber 4, the decompression zipper 6 and the opening / closing zipper 7 are closed, and this heating bag is heated in a microwave oven, the pressure in the storage chamber 4 increases due to steam generated from the food, etc. As shown to 2 (a), the storage chamber 4 will be in the state which swelled. Thus, food can be efficiently heated by filling the storage chamber 4 with water vapor and increasing its pressure.

  When this pressure exceeds a predetermined pressure, the decompression zipper 6 opens and the storage chamber 4 and the decompression chamber 5 communicate with each other as shown in FIG. Thereby, the pressure in the storage chamber 4 is quickly reduced, and the bag body is prevented from being ruptured by this pressure. At this time, since the open / close zipper 7 remains closed, the water vapor that has moved to the decompression chamber 5 does not escape from the bag as it is, and there is no sudden drop in pressure, and the food is efficiently heated subsequently. Can do. On the other hand, since a certain amount of water vapor escapes from the communication hole 8 formed in the decompression chamber 5 (see symbol f in the figure), the food is efficiently heated while preventing the bag body from bursting. Some degree of pressure necessary to do so is maintained.

  When heating is completed, the open / close zipper 7 is opened by hand, and the food in the storage chamber 4 is taken out. As the opening / closing zipper 7, one having a sealing force larger than that of the decompression zipper 6 is used, and the opening / closing zipper 7 does not open at a pressure normally applied to the storage chamber 4. When the high pressure state continues even if the steam is released from the communication hole 8 due to a large amount of steam generated from the food, it is opened by the high pressure to prevent the bag body from bursting. The function to perform can also be provided.

  In this embodiment, when the decompression zipper 6 is opened and the interior of the storage chamber 4 and the decompression chamber 5 is filled with steam, the internal volume of the decompression chamber 5 is 0.1 to 20% of the capacity of the storage chamber 4. It is configured to be within the range. By setting it within this range, when the decompression zipper 6 is opened, the effect of quickly reducing the pressure in the storage chamber 4 to a pressure that can avoid the bursting of the bag body is exhibited. By making this range within the range of 0.5 to 5%, the effect can be further enhanced.

  Further, in this embodiment, the opening area of the communication hole 8 (the sum of the areas of the two communication holes 8) is that when the decompression zipper 6 is opened and the interior of the storage chamber 4 and the decompression chamber 5 is filled with steam. It is comprised so that it may become in the range of 0.1 to 10% of the opening area of the storage chamber 4. FIG. By setting it within this range, after opening the decompression zipper 6, the effect of preventing the bursting of the bag body is exhibited while maintaining a high pressure necessary for heating the food. By making this range within the range of 0.5 to 5%, the effect can be further enhanced.

  In the embodiment shown in FIG. 1, the aspect using the rectangular bottom sheet 3 is shown. However, as shown in FIGS. 3A and 3B, the bottom sheet is non-rectangular (hexagonal in this figure). 3 may be used. In this case, as in the case of using the rectangular bottom sheet 3, when food is stored in the storage chamber 4, the bottom sheet 3 is developed by the weight of the food, and the bag is stabilized by the bottom sheet 3. Can be independent.

4A to 4C show a first embodiment of a heating bag according to a reference example . This heating bag heat-welds the left and right end portions and the upper end portions of a rectangular front sheet 1 and a back sheet 2 made of a resin material, and a rectangular bottom sheet 3 made of the same material as the front sheet 1 and the back surface. The bottom part of the bag body constituted by the front sheet 1 and the back sheet 2 is closed by thermal welding with the sheet 2.

  The lower side of the bag is a storage chamber 4 for storing food to be heated. A decompression chamber 5 is provided on the upper side of the storage chamber 4, and a decompression zipper 6 is provided between the storage chamber 4 and the decompression chamber 5 to divide the storage chamber 4 and the decompression chamber 5 in an openable and closable manner. It has been. The decompression chamber 5 is formed with a communication hole 8 through which air inside and outside the decompression chamber 5 communicates. The upper end of the decompression chamber 5 is open, and the food is stored in the storage chamber 4 from the upper end. And after this accommodation, this upper end part is closed by heat welding.

  Thus, since the upper end of the decompression chamber 5 is thermally welded after the food is stored, no opening / closing zipper (see reference numeral 7 in FIG. 1 or the like) is provided, and the opening is opened at the side end of the decompression chamber 5. This is done by tearing the notches 9 formed.

  In the embodiment shown in FIG. 4, the aspect using the rectangular bottom sheet 3 is shown. However, as shown in FIGS. 5A and 5B, the non-rectangular (hexagonal shape in this figure) bottom sheet. 3 may be used. In this case, as in the case of using the rectangular bottom sheet 3, when food is stored in the storage chamber 4, the bottom sheet 3 is developed by the weight of the food, and the bag is stabilized by the bottom sheet 3. Can be independent.

6A and 6B show a second embodiment of the heating bag according to the reference example . This heating bag constitutes a bag body by thermally welding the left and right end portions and the upper end portions of a rectangular front sheet 1 and rear sheet 2 made of a resin material.

  The lower side of the bag is a storage chamber 4 for storing food to be heated. A decompression chamber 5 is provided on the upper side of the storage chamber 4, and a decompression zipper 6 is provided between the storage chamber 4 and the decompression chamber 5 to divide the storage chamber 4 and the decompression chamber 5 in an openable and closable manner. It has been. The decompression chamber 5 is formed with a communication hole 8 through which air inside and outside the decompression chamber 5 communicates. Since the upper end portion of the decompression chamber 5 is thermally welded, the opening / closing zipper 7 is not provided, and the opening is performed by tearing a notch 9 formed in the side end portion of the decompression chamber 5. The lower end of the storage chamber 4 is open, and the food is stored in the storage chamber 4 from this lower end. And after this accommodation, this lower end part is closed by heat welding.

  Each of the above embodiments is merely an example, and as long as the problem of the present invention that efficiently heats food in a short time can be solved while preventing the bag from bursting during heating, the reduced pressure zipper 6 and the configuration of the open / close zipper 7 and the size, shape, number, etc. of the communication holes 8 may be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Front sheet 2 Back sheet 3 Bottom sheet 4 Storage chamber 5 Decompression chamber 6 Decompression zipper 7 Opening / closing zipper 8 Communication hole 9 Notch

Claims (3)

A storage room (4) for storing food to be heated;
A decompression chamber (5) attached to the storage chamber (4);
A communication hole (8) formed in the decompression chamber (5) for communicating air inside and outside the decompression chamber (5);
A decompression zipper (6) for freely opening and closing the storage chamber (4) and the decompression chamber (5);
An opening / closing zipper (7) having a sealing force larger than that of the decompression zipper (6), which allows the decompression chamber (5) to be opened and closed;
When the food is cooked, the storage chamber (4) is closed so that the decompression zipper (6) is closed so that steam inside the storage chamber (4) does not escape to the decompression chamber (5) side. When the vapor pressure in the storage chamber (4) exceeds a predetermined value, the decompression zipper (6) is opened at that pressure, and a part of the pressure is transferred to the communication hole ( 8) is escape from the housing and taking out the food, and performs opening and closing the opening and closing zipper (7), when even escape steam from the communication hole (8) Note that the high pressure state continues, A heating bag that is opened by the high pressure to prevent the bag body from rupturing .   When the decompression zipper (6) is opened and the interior of the storage chamber (4) and the decompression chamber (5) is filled with steam, the internal volume of the decompression chamber (5) is the same as that of the storage chamber (4). The heating bag according to claim 1, wherein the heating bag is in the range of 0.1 to 20% of the volume.   The opening area of the communication hole (8) is such that the decompression zipper (6) is opened, and the interior of the storage chamber (4) and the decompression chamber (5) is filled with steam. The heating bag according to claim 1 or 2, which is within a range of 0.1 to 10% of an opening area.

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