CN214398127U - Self-heating heat preservation bag for packaging fried Chinese chestnuts - Google Patents

Abstract

The application relates to a self-heating thermal insulation bag for packaging fried Chinese chestnuts, which at least comprises an outer bag, an inner bag and a heating bag, the outer bag is provided with air permeability or air holes, the material with air permeability is adopted or the air holes are arranged on the material to provide sufficient air intake amount for heating the heating bag, the inner bag is air-permeable or hygroscopic, and is made of air-permeable or hygroscopic material, or the materials are perforated with air holes, so that the water vapor generated by the hot chestnut filled in the inner bag can be absorbed or exhausted, the outer bag, the inner bag and the heating bag are independent units, the self-heating thermal insulation bag is assembled by a bag sleeving structure that the interlayer part between the inner bag and the outer bag of the outer bag is provided with the heating bag, the heat preservation bag comprises a self-heating heat preservation bag assembled by adopting a bag-shaped structure of an inner bag and an outer bag, and also comprises a self-heating heat preservation cup assembled by adopting a cup-shaped structure of an inner cup and an outer cup.

Description

Self-heating heat preservation bag for packaging fried Chinese chestnuts

Technical Field

The utility model belongs to the technical field of food package and specifically relates to a spontaneous heating heat preservation wrapping bag for packing stir-fry chinese chestnut.

Background

The sugar-fried Chinese chestnut is a delicious food which is suitable for both south and north, and both the old and the young, and the sugar-fried Chinese chestnut is almost eaten in the same way from September every year, almost all the places in China regardless of south and north, every city is almost sold with the current fried Chinese chestnut, the chestnut which is just fried is delicious and easy to be shelled, but the taste of the Chinese chestnut is also changed after the Chinese chestnut is cooled, the Chinese chestnut is obviously not delicious without hot chestnuts, and is not easy to shell, so that the fried Chinese chestnut is covered by a small quilt for heat preservation in the process of frying the Chinese chestnut, after the customers buy the Chinese chestnut, the merchants basically contain the Chinese chestnut by a common single-layer portable paper bag, thus the paper bag has no heat preservation effect, the Chinese chestnut can be cooled quickly, a customer only eats one jin of Chinese chestnut and one jin of Chinese chestnut, the Chinese chestnut is completely cooled, the problem is not solved by people all the time, and the roasted chestnuts are considered to be the same by all people, so that the chestnut roasting method is common.

The prior patent applications of self-heating products and related self-heating packages have already been provided, but the self-heating packages are developed for instant food, such as self-heating fast food boxes, chafing dish boxes, beverage cups and other self-heating packaging containers, and the food to be heated is also food containing much moisture, so the inner and outer layer structures of the packaging containers are required to be plastic boxes, laminated paper boxes or even metal materials without water leakage.

Obviously, if the water-tight self-heating packaging container originally used for containing the ready-to-eat product with more water is simply adopted to contain the fried hot chestnut, the packaging is not feasible, because the cooked chestnut can uninterruptedly release water vapor under the continuous heating and heat preservation state, particularly when the container is used for take-out packaging, the packaging generally needs to be sealed for food safety, if the water vapor can not be discharged or discharged in time, the water vapor can be condensed into water beads to soften the shell of the chestnut, the softened shell of the chestnut is not easy to peel off, if the container is a sugar fried chestnut, when a customer peels off the soaked shell of the chestnut, the handle is dirtied, the sticky paste is not sanitary, and if the shell of the chestnut is soaked for too long time, the chestnut can reversely permeate into the kernel of the chestnut, so that the taste and the fragrance of the hot chestnut flour are influenced, therefore, the existing self-heating packing box and packing bag can not be used for packing the fried Chinese chestnut.

In order to solve the problems, the application provides a solution specially for a relatively simple self-heating heat preservation container for frying Chinese chestnuts, and aims to prolong the optimal eating temperature and time of the fried Chinese chestnuts as far as possible after customers buy the fried Chinese chestnuts, especially to keep the optimal taste and flavor of the fried Chinese chestnuts as far as possible in a take-out scene, so that each Chinese chestnut is easier to be peeled, the user experience is increased, and the user value is improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not only simple but also easy equipment be used for packing the self-heating insulation packaging bag (hereinafter be referred to as insulated bag) of frying chinese chestnut now solution, strive for in extension heat preservation time, keep under the target of the fragrant smell taste of ripe chinese chestnut, accomplish as far as possible simple, practical, low cost, this application will adopt the double-deck bagging scheme of the outer bag of cover outside the inner bag simple relatively, big bag endotheca pouch promptly, or the scheme of outer bag cover inner bag.

According to the optimum temperature for frying the Chinese chestnut and the characteristic attribute that the Chinese chestnut can continuously generate water vapor in a heating state, the heat preservation bag must preserve heat and can discharge or absorb the water vapor released by the Chinese chestnut in time so as to continuously keep the inside of the heat preservation bag dry, therefore, the inner bag of the heat preservation bag must at least have air permeability or moisture absorption function, or simultaneously have air permeability and moisture absorption function.

And simultaneously, still have the intermediate layer space that can lay the package that generates heat between the inner bag of insulated bag and the outer bag, the package that generates heat that can generate heat has in the intermediate layer space, the package that generates heat is for the raw materials package that can generate heat through chemical reaction, the raw materials package that generates heat includes the package that generates heat that mainly generates heat the ingredient is the iron powder at least, or the principal component is the package that generates heat of lime, if adopt the watered package that generates heat of lime, need be to this application such package that generates heat the scheme carries out individual suitability design, and this application will only explain to the package that generates heat that adopts the iron powder to be main heating material.

Fig. 1 shows the schematic diagram of a basic example of the insulated bag of this application, and insulated bag a0 shown in the figure includes outer bag a1, the inner bag a2 of inlayer, outer bag a1 is independent bag body structure with inner bag a2, inner bag a2 struts and can directly put into outer bag a1 after strutting, and this example outer bag a1 is higher than inner bag a2, and has the space that can place the heating package between inner bag a2 and the outer bag a1, and after placing the heating package in middle both sides of the outer bag that struts and bottom promptly, can also put the inner bag that struts in the middle of the heating package on both sides.

Outer bag a1 both sides upper portion has handle a19, certainly, the handle also includes direct hand-type handle of plagiarizing on the bag body, the inboard at outer bag a1 sack border has adhesive tape a11, if not timely edible, can glue outer bag sack after tearing adhesive tape top layer plastic film to play heat retaining function more, especially when being used for the takeaway scene, both can keep warm, can ensure food safety again, prevent that the takeaway from direct contact bag interior food, certainly, seal the mode and also can adopt snap-fastener, magic subsides to seal, the disposable adhesive tape of preferred not repeatedly usable, this application will all explain for sealing the mode with the adhesive tape, this application will all represent similar function of sealing with the adhesive tape promptly.

Fig. 2 shows a partial schematic view of the bottom portion of the vertical cross section of the insulating bag a0 along the middle dividing line, a heating bag f1 is arranged between an outer bag a1 and an inner bag a2, when in use, the outer bag a1 is firstly opened, then the sealing bag of the heating bag f1 is unsealed and then placed in an outer bag a1, the heating bag f1 is placed in the outer bag in a U-shaped manner, then the inner bag a2 is opened, the inner bag a2 is placed in the middle of the U-shaped heating bag f1, and the simple, practical and easy-to-assemble frying chestnut insulating bag can be formed.

In this example, the outer bag a1 is made of non-woven fabric without a film to ensure sufficient air permeability to allow the heat pack f1 to continuously and stably generate heat, while the inner bag a2 is also made of non-woven fabric without a film and having a certain hygroscopicity, i.e., hydrophilic non-woven fabric, preferably hydrophobic non-woven fabric is not used, so that water vapor generated by hot chestnut can permeate the non-woven fabric inner bag a2, the chemical reaction process of the heat pack f1 requires participation of part of water, and part of the water vapor can be absorbed by the heat pack f1 and partially permeate out of the heat pack to ensure drying in the bag.

Of course, the inner bag a2 can be made of paper, such as kraft paper, white cardboard or even cotton paper, preferably paper having both air permeability and moisture absorption. That is, the inner bag a2 is preferably a paper bag or a nonwoven cloth bag having a certain moisture absorption and air permeability and no coating film or film (hereinafter, collectively referred to as a film) to ensure that water vapor generated from the continuously heated hot chestnut is absorbed or removed.

It should be noted that, paper bags for containing cooked chestnuts at present, such as common kraft paper bags and white cardboard paper bags, are generally paper bags without a film, have certain hygroscopicity and certain air permeability, but the air permeability is only very weak air permeability which is existed for a long time, so that the weak air permeability obviously cannot meet the air permeability requirement of the heat preservation bag in the application and cannot meet the requirement of the air inflow required by the heat-generating bag, and the air permeability is only relative to completely airtight film-coated paper bags, film-coated non-woven fabrics and plastic bags, and in order to distinguish the air permeability which is required to be fast from the air permeability in the application, the application understands the weak air permeability as micro air permeability.

And the required gas permeability that has certain air input or ventilative volume of this application understands the gas permeability, because the required oxygen of package that generates heat needs to be obtained outside outer bag, consequently the gas permeability of outer bag or bleeder vent need satisfy the air intake volume of the bag that generates heat, especially when the insulated bag is used for the takeaway, the sack needs to be sealed, consequently outer bag must have the gas permeability of certain air input, for example adopt the non-woven fabrics material that does not drench the membrane, because the non-woven fabrics has a lot of even micropores, can satisfy the requirement of air input, if adopt ventilative material or ventilative not drench membrane paper a little, then need open the bleeder vent specially on these materials to satisfy a certain amount of air input.

In the partial cross-sectional view of the bottom part of the thermal insulation bag a0 shown in fig. 3, if the outer bag a1 is a paper bag, such as kraft paper, white cardboard, or even a laminated non-woven fabric or a plastic bag, air holes a100 may be formed in the lower part, bottom part or all of the outer bag a1 to ensure the air input of the outer bag.

Further, if the inner bag a2 is made of a paper bag with small air permeability, such as kraft paper or white cardboard, the air holes a200 may be perforated at the lower part, bottom or all of the outer bag a2 to increase the air permeability of the inner bag.

Furthermore, in order to enhance the heat preservation performance of the heat preservation bag, a heat preservation layer can be added on the inner side of the outer bag.

Fig. 4 is a schematic cross-sectional view of the bottom portion of the thermal insulation bag a0, a thermal insulation layer a13 is added on the inner side of the outer bag a1, the thermal insulation layer a13 can be thermal insulation cotton or spunlace fabric, for example, acrylic cotton polyester cotton with a thickness of about 5mm is pressed or glued on the inner side of the non-woven fabric outer bag a1 through an ultrasonic dot matrix to increase the thermal insulation effect, and the material and thickness of the thermal insulation cotton are designed and customized according to actual conditions, for example, designed independently according to different seasons, climates and geographical positions.

Furthermore, besides selecting a paper bag with relatively strong hygroscopicity and air permeability as the inner bag, a material with relatively weak hygroscopicity and air permeability can be used as the inner bag material, and a layer of water-absorbing material with strong hygroscopicity is attached to the inner layer or the outer layer of the inner bag a2 to serve as the moisture-absorbing layer.

As shown in fig. 5, which is a schematic cross-sectional view of a middle section of the thermal insulation bag a0, a moisture absorption layer a28 with relatively strong moisture absorption is attached to an outer side of an upper portion of the inner bag a2, and air holes a201 may be formed in the inner bag a2, so that the moisture absorption layer a28 can absorb water vapor better. The water absorbing layer can be cotton paper with strong hygroscopicity, hydrophilic non-woven fabric or other materials with strong hygroscopicity.

If the inner bag a2 is made of a material with strong hygroscopicity and air permeability, the outer bag and the heat-insulating layer can be made of a film-coated aluminum foil foaming material with heat-insulating property, and air inflow can be kept only by uniformly punching air holes, so that the material selection scheme is also possible.

In a word, the air-permeable material and the method for ensuring that the outer bag has certain air inflow ensure that the inner bag has certain moisture absorption and air permeability, and the requirement that the inner bag can be kept dry while heating and heat preservation are met, namely the requirement of the solution scheme in the application is met.

Further, since the thermal conductivity of the chestnuts is not high and there are gaps between the chestnuts, especially, the larger the gaps between the chestnuts, the worse the thermal conductivity, the chestnuts loaded in the inner bag may be heated unevenly, and the closer to the inner wall of the inner bag having the heat generating pack, the higher the temperature of the chestnuts, especially the fried chestnuts whose temperature has been reduced after being taken out of the pot, the lower the temperature of the chestnuts in the middle.

Therefore, a medium which is beneficial to heat conduction and heat preservation can be added into the Chinese chestnuts to fill gaps among the Chinese chestnuts, so that the heat conduction efficiency can be increased, the heat preservation time can be prolonged, the temperature fluctuation can be reduced, the temperature stability can be maintained as far as possible, and if the ceramic particles with micropores are adopted, the ceramic particles also have certain hygroscopicity.

Fig. 6 is a schematic cross-sectional view of adding heat-conducting and heat-insulating medium into an inner bag, wherein a medium j0 is added into a Chinese chestnut b1 in the inner bag a2, and the medium is small non-toxic, harmless and low-cost granular material, such as common roasted Chinese chestnut sand, for example, quartz sand and ceramic granules, and preferably the granular material is about 2-8mm according to the size of the Chinese chestnut.

If chestnuts fried at one time are not sold, even if the chestnuts which are not sold are covered with cotton quilts for heat preservation, the temperature of the chestnuts can be slowly reduced, when the temperature is lower than a certain temperature, such as 30 ℃, even lower to be close to the ambient temperature, after the chestnuts are filled into the heat preservation bag, if the medium j0 is not added, even if the heating bag f1 starts to continuously and stably heat, the chestnuts in the middle of the inner bag are not easy to uniformly heat, a customer can also be turned when eating the chestnuts, and if the heat preservation bag is in a closed state, the chestnuts can not be uniformly heated by being stirred and turned, so that the medium j0 is added, the heat conductivity can be increased, the chestnuts in the middle are heated more uniformly, and the internal and external temperature difference is smaller.

Further, because the uncertainty of frying the chinese chestnut and selling, the chinese chestnut is fried ripe the back and is not fit for continuing to heat preservation for a long time in the boiler, because can make the moisture of frying the chinese chestnut lose like this for the chestnut benevolence is dried and is hardened, influences the taste then, consequently, based on this application medium j0, this application still provides a extension heat preservation time simultaneously, reduces the temperature volatility, maintains the method of temperature stability.

During the chestnut frying, one special medium heating container is used to heat and preserve the chestnut sand, ceramic grains and other medium to certain temperature, such as 35-65 deg.c, preferably 40-50 deg.c, preferably to the temperature of hand contact but not too hot, and the heating and preserving temperature of the medium heating container is set to 47 deg.c to maintain the medium j0 at 47 deg.c. The medium heating container can be a closed heating and heat-preserving container, a switch or a valve is pressed when the medium needs to be taken, a certain set amount of medium falls out, standard taking is achieved, and energy consumption can be reduced.

When a customer buys chestnuts, the folded outer bag a1 is unfolded, the heating bag f1 is unsealed and then placed into the outer bag a1, the inner bag a2 is opened, the heating bag f1 is placed between the outer bag a1 and the heating bag f, the chestnuts are weighed for the customer, the weighed chestnuts are poured into the inner bag a2, a certain amount of preheated medium j0 is poured into the inner bag a2, the heat preservation bag is slightly shaken, and the medium j0 is mixed with the fried chestnuts, so that the heat preservation time of the chestnuts can be prolonged, heat generated by the heating bag can be conducted more uniformly, and the temperature of the chestnuts in the inner bag a2 is more uniform and durable. Of course, the medium is preferably made of low-cost clean materials, such as ceramic ball roasted sand, and can also be recycled as a marketing means, so that the two purposes are achieved.

The utility model relates to a spontaneous heating insulated bag for packing stir-fry chinese chestnut, its characterized in that, the insulated bag includes outer bag, inner bag, the package that generates heat at least, the outer bag has gas permeability or bleeder vent, adopts the material that has the gas permeability or beat the bleeder vent on the material do it the package that generates heat provides the air input that enough generates heat, the inner bag has gas permeability or and hygroscopicity, adopts the material that has gas permeability or and hygroscopicity, perhaps beats the bleeder vent on the material, can absorb or with the produced vapor of the hot plate chinese chestnut in the dress inner bag and get rid of, outer bag, inner bag, the package that generates heat are independent unit separately, according to outer bag cover inner bag, the bagging construction assembly of the package of generating heat is put to the intermediate layer portion between the inner bag outer bag of inner bag.

The heat preservation bag comprises a self-heating heat preservation bag assembled by adopting a bag-shaped structure of an inner bag and an outer bag, and also comprises a self-heating heat preservation cup assembled by adopting a cup-shaped structure of an inner cup and an outer cup.

The heat-insulating layer is attached to the inner side of the outer bag, or the outer bag is provided with a heat-insulating structure or a heat-insulating layer.

The outer wall of the inner bag is attached with a moisture absorption layer, or the inner bag is provided with a moisture absorption layer or a moisture absorption layer,

the outer bag of the heat-insulating bag is provided with a sealing structure or a sealing adhesive tape, and the opening of the heat-insulating bag can be sealed.

The inner bag is filled with a medium with thermal conductivity, the medium is used as a part of the heat preservation bag to be mixed with the fried Chinese chestnut to play roles of heat preservation and heat conduction, and the medium at least comprises one or more of the fried Chinese chestnut sand, quartz sand and ceramic balls.

When the inner bag is made of non-air-permeable materials, air holes are punched in the inner bag, so that water vapor in the inner bag can be absorbed or discharged conveniently.

The inner wall of the outer cup or the outer bag is provided with an air guide structure and air holes, so that air can conveniently enter an interlayer between the inner bag and the outer bag or between the inner cup and the outer cup, and the heating bag can normally heat.

The thermos cup has the bowl cover, the bowl cover is double-deck bowl cover, has heat preservation and hygroscopic layer, perhaps is the individual layer bowl cover, has heat insulating ability and hygroscopicity, the bowl cover has the gas permeability or the bleeder vent that provide air cycle for the package that generates heat.

This application is right the heat preservation method of frying chinese chestnut in the heat preservation bag includes, including pack into after frying the chinese chestnut in the bag, again to pack into a certain amount of medium after the heating in the heat preservation bag to make chinese chestnut and medium mix through rocking, will pass through the temperature of medium itself and pass through the temperature of package will heat conducts more evenly sooner, makes the temperature of chinese chestnut in the heat preservation bag is more even more lasting.

The medium is heated and insulated by a medium heating container, and the medium heating container is an independent heating and insulating device with temperature control heating and insulating functions.

Based on this application spontaneous heating insulated bag, be convenient for transportation storage, the equipment of being convenient for is used for packing specially and fries the chinese chestnut, especially take-away scene, can maintain the taste better, promotes user experience, simple and practical.

Drawings

Fig. 1 is a schematic view of a basic example of the thermal bag.

Fig. 2 is a partial schematic view of the bottom portion of a vertical cross-section of insulated bag a0 along a midline.

Fig. 3 is a partial schematic view of the lower half cross section of the thermal bag a 0.

Fig. 4 is a schematic cross-sectional view of the bottom portion of the thermal bag a 0.

Fig. 5 is a schematic cross-sectional view of a middle section of the thermal bag a 0.

FIG. 6 is a schematic cross-sectional view of the addition of a thermally conductive insulating medium in the inner bag.

Fig. 7 is a schematic view of an embodiment of an insulated bag d 0.

FIG. 8 is a schematic view of the vertical cross section of the lower half of the thermal bag d 0.

Fig. 9 is a schematic longitudinal cross-section of an embodiment of a two-layer sleeve for an insulated bag.

Fig. 10 is a schematic cross-sectional view of the outer cup c 1.

Detailed Description

Further embodiments of the self-heating heat-preserving packing bag for packing the roasted chestnuts according to the present application will be described below by way of examples.

First embodiment, fig. 7 is a schematic view of an embodiment of the thermal insulation bag of the present application, which includes an outer bag d1 and an inner bag d2, wherein the outer bag d1 of the thermal insulation bag d0 of the present embodiment is made of kraft paper, the lower half portions of both sides are pressed with vent holes d100 having a diameter of about 1-2mm, the opening side of the outer bag d1 is provided with a sealing edge d17, the sealing edge d17 is a natural extension part of one side of the outer bag d1, of course, it is also possible to separately attach the outer bag d1 on the open side, and the edge of the sealing edge d17 has an adhesive tape d11, when the inner bag d2 is filled with chestnuts, the thermal bag d0 can be sealed by folding the sealing edge d17 towards the other side of the outer bag d1 and sticking the adhesive tape d11, the middle part of the sealing edge d17 is provided with a breaking point line d171, when the thermal bag d0 with the seal needs to be opened, the thermal bag can be directly torn from the breaking point line d 171.

The inner wall of the outer bag d1 is attached with a heat-insulating layer d13, and the heat-insulating layer can be made of 3-8mm thick acrylic cotton, polyester cotton, needle-punched cloth, spunlaced cloth and the like and is attached to the inner wall of the outer bag d 1. The pasting process and the process of punching the air holes d100 can be completely finished on one production line at one time from front to back, the outer bag d1 paper is firstly punctured through a vertebral body, and then the heat preservation layer d13 is pasted through dispensing and pressing.

In the embodiment, the inner bag d2 is made of 40-120g of wood pulp PP spunlace nonwoven fabric with certain hygroscopicity and air permeability.

Fig. 8 is a schematic view of the vertical cross section of the lower half part of the thermal insulation bag d0, which is an outer bag d1, a heating bag f2 and an inner bag d2 from outside to inside.

If necessary, Chinese chestnuts can be filled in the inner bag d2, and then a medium, such as ceramic balls and quartz sand, is added.

Of course, the package for containing the fried Chinese chestnut can be completely changed into a cup shape from a bag, such as a disposable paper cup shape, and the bagging solution of the insulated bag can also be used in a cup-shaped structure.

Fig. 9 is a schematic longitudinal cross-sectional view of an embodiment of a two-layer sleeve cup solution of the thermal bag of the present application, and this embodiment will be described only with a schematic cross-sectional view.

The heat preservation sleeve cup c0 is respectively an outer cup c1, a heating bag f3 and an inner cup c2 from outside to inside, and the cup mouth is provided with a cup cover c 3.

Bowl cover c3 has double-deck material structure, and bowl cover shell c31 is the plastics lid shell, has bleeder vent c310, perhaps adopts the gas permeability material, does generate heat the package and provide air cycle, bowl cover c3 inboard is ventilative moisture absorption layer c32 for absorb the steam of hot chinese chestnut evaporation condensation, certainly, also can adopt the material suppression that has the heat insulating ability the bowl cover to the laminating moisture absorption layer, or adopt the material preparation that the individual layer has heat insulating ability or hygroscopicity.

The inner cup c2 is made of non-laminated paper cup or non-woven fabric, if a kraft paper cup is used, the small air holes c200 can be pressed on the paper cup, and certainly, if the cup-shaped structure is made of non-woven fabric or cotton paper with good air permeability, the holes do not need to be opened.

Furthermore, the outer wall of the inner cup c2 can be attached to a moisture absorption layer c28 which is air-permeable and water-absorbing at the upper part close to the cup opening, the moisture absorption layer can be made of a material with a certain thickness, when the inner cup is placed into the outer cup to complete the heat-insulating sleeve cup, the effects of air permeability, heat insulation and protection on the heating bag f3 can be achieved, and the moisture absorption layer c28 can be made of needle-punched spunlace nonwoven strips, thick cotton paper tapes or other fluffy moisture absorption materials.

Further, the heating bag f3 can be a multi-piece combined structure, the cup bottom can be an independent round heating bag, the side surface can be a multi-section subsection conjoined heating bag, and an annular structure is formed by enclosing the inner wall of the outer cup, so that the inner cup c2 can be placed conveniently.

Fig. 10 is a schematic cross-sectional view of the outer cup c1, the outer cup c1 of this embodiment is formed by foaming, for example, EPS is foamed to form a foamed outer cup, the bottom of the outer cup c1 has a vent hole c100, and the vent hole may also be arranged on the side surface of the cup body.

Further, the inner side of the outer cup c1 is also provided with a convex or concave air guide structure c101, which is beneficial to air entering when the heating bag is placed in the outer cup.

Furthermore, the outer edge of the cup mouth of the outer cup is provided with a buckling structure c102 for tightly covering the cup cover c 3.

Certainly, the bowl cover also can need not gas permeability or bleeder vent, also can will for the generate heat the package provides the gas permeability or bleeder vent design of air cycle in outer cup c 1's upper portion, similar for the generate heat the package provides the gas permeability or bleeder vent of air cycle no matter on the bowl cover or outer cup, all belong to similar the same function, this application will be with gas permeability or bleeder vent on the bowl cover replace and explain.

This application cover bag or retainer cup structure mainly adopts independent part structure, both is convenient for transport, also is convenient for simply assemble fast, also need not to be the more complicated structure of unsealing of package design for generating heat.

The cost of the whole heat-preservation sleeve bag or the heat-preservation sleeve cup can possibly account for about 3% -7% of the price of one to two jin of chestnuts, compared with the cost that a traditional single layer of kraft paper bags or white cardboard paper bags of about 70-120 g only account for about 0.5% -1% of the price of one to two jin of chestnuts, the best temperature of the fried chestnuts can be kept, the best taste is maintained, especially, the heat-preservation sleeve bag or the heat-preservation sleeve cup is used for selling, user experience can be improved, the currently-fried chestnuts with high net profits do not need to be transferred to consumers, the same price is kept, the quality and the experience are improved, the overall net profits can be improved by increasing the sales volume, obviously, the increased packaging cost is very worthy, the whole heat-preservation bag can adopt conventional degradable materials, and the heat-preservation sleeve cup is friendly to the environment.

The specific data, materials used, forms and proportions of the figures described in all the examples and illustrations of this application are set forth merely for the purpose of illustration and are not intended to limit the invention to the particular forms or proportions disclosed. One skilled in the relevant art may recognize, however, that one or more of the specific details, embodiments, or materials may be omitted, or other methods, components, or materials may be used, in which some embodiments are not described or are not described in detail. Furthermore, the described features, implementations, or characteristics may be combined in any suitable manner in one or more embodiments and should not be construed as limiting the present invention.

Claims (9)

1. A spontaneous heating insulated bag for packaging fried Chinese chestnut is characterized in that:

the heat-insulating bag at least comprises an outer bag, an inner bag and a heating bag,

the outer bag is provided with air permeability or air holes, the material with air permeability is adopted or the air holes are arranged on the material to provide sufficient air intake amount for heating the heating bag,

the inner bag has air permeability or hygroscopicity, adopts air permeability or hygroscopicity material, or has air holes, and can absorb or eliminate water vapor generated by hot chestnut loaded in the inner bag,

the outer bag, the inner bag and the heating bag are independent units, and the self-heating thermal insulation bag is assembled according to a bag sleeving structure that the inner bag is sleeved by the outer bag and the heating bag is placed in the interlayer part between the inner bag and the outer bag.

2. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 1, wherein:

the heat preservation bag comprises a self-heating heat preservation bag assembled by adopting a bag-shaped structure of an inner bag and an outer bag, and also comprises a self-heating heat preservation cup assembled by adopting a cup-shaped structure of an inner cup and an outer cup.

3. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 2, wherein:

when the inner bag is made of non-air-permeable materials, air holes are punched in the inner bag, so that water vapor in the inner bag can be absorbed or discharged conveniently.

4. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 2, wherein:

the inner wall of the outer cup or the outer bag is provided with an air guide structure and air holes, so that air can conveniently enter an interlayer between the inner bag and the outer bag or between the inner cup and the outer cup, and the heating bag can normally heat.

5. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 2, wherein:

the thermos cup has the bowl cover, the bowl cover is double-deck bowl cover, has heat preservation and hygroscopic layer, perhaps is the individual layer bowl cover, has heat insulating ability and hygroscopicity, the bowl cover has the gas permeability or the bleeder vent that provide air cycle for the package that generates heat.

6. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 1, wherein:

the heat-insulating layer is attached to the inner side of the outer bag, or the outer bag is provided with a heat-insulating structure or a heat-insulating layer.

7. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 1, wherein:

the outer wall of the inner bag is attached with a moisture absorption layer, or the inner bag is provided with a moisture absorption layer or a moisture absorption layer.

8. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 1, wherein:

the outer bag of the heat-insulating bag is provided with a sealing structure or a sealing adhesive tape, and the opening of the heat-insulating bag can be sealed.

9. The self-heating thermal insulation bag for packaging the fried chestnuts according to claim 1, wherein:

the inner bag is filled with a medium with thermal conductivity, the medium is used as a part of the heat preservation bag to be mixed with the fried Chinese chestnut to play roles of heat preservation and heat conduction, and the medium at least comprises one or more of the fried Chinese chestnut sand, quartz sand and ceramic balls.

Images