A portable refrigerated food packaging bag

Abstract

The present invention belongs to the technical field of food packaging, and specifically is a portable refrigerated food packaging bag, comprising an inner bag and an outer bag, wherein the inner bag is located inside the outer bag, and the bag opening of the inner bag is fixedly connected to the bag opening of the outer bag, and the space between the outer wall of the inner bag and the inner wall of the outer bag is set as a cavity, and the cavity is evenly divided into a plurality of refrigeration chambers, and the refrigeration chambers are evenly distributed in the cavity along the vertical direction, and any two adjacent refrigeration chambers in the bag body are not connected to each other, and a refrigerant bag and a reactant bag are fixedly installed in the refrigeration chamber, and the refrigerant bag and the reactant bag are in contact with each other but not connected to each other, and a refrigerant is contained in the refrigerant bag, and water as a reactant is contained in the reactant bag; the present invention has a simple structure and can realize uniform refrigeration to store and transport refrigerated and frozen foods, and can also avoid the phenomenon that the refrigerant flows out after the refrigeration chamber is broken, resulting in failure of refrigeration.

Description

Technical Field

[0001] The invention belongs to the technical field of food packaging, in particular to a portable refrigerated food packaging bag. Background Art

[0002] Food packaging bags refer to film containers that are in direct contact with food and are used to hold and protect food. Food packaging bags can be divided into ordinary food packaging bags, vacuum food packaging bags, inflated food packaging bags, boiled food packaging bags, steamed food packaging bags and functional food packaging bags according to their scope of application. Most of the existing food packaging bags are single-layer bag designs, and the existing food packaging bags often cannot preserve the quality of frozen and refrigerated foods such as seafood when they are used to hold frozen and refrigerated foods. They rely heavily on cold chain transportation to ensure the quality of these foods.

[0003] There are also some technical solutions for portable refrigerated food packaging bags in the prior art. For example, Chinese patent application No. 202011614539.8 discloses a food packaging bag with a self-cooling function, including a packaging bag body, the packaging bag body is an open structure, and is sealed by a tear strip at the top. The packaging bag body is respectively provided with a packaging cavity and a refrigeration cavity, the packaging cavity is used to hold frozen food, the refrigeration cavity is located below the packaging cavity, and side cavities are provided on both sides of the content cavity, the side cavities are also an open structure, and the bottom of the side cavity is connected to the The refrigeration chambers are connected by a connecting pipe, an ice bag is provided in the side cavity, an opening is provided at the bottom end of the ice bag, and a refrigerant is contained in the refrigeration chamber. In this solution, water formed by melting ice in the ice bag flows into the refrigeration chamber to react with the refrigerant for an endothermic reaction, thereby causing the packaging bag to start cooling, thereby ensuring that the frozen and refrigerated food in the bag will not deteriorate during non-cold chain transportation. However, this solution also has the problem that the packaging bag will not be able to be refrigerated when the refrigeration chamber or the ice bag is accidentally damaged during transportation or the refrigerant in the refrigeration chamber fails. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art and solve the problem that the food packaging bag will not be able to refrigerate when the refrigeration cavity or ice bag is accidentally damaged during transportation or the refrigerant in the refrigeration cavity fails, the present invention proposes a portable refrigerated food packaging bag.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a portable refrigerated food packaging bag described in the present invention comprises an inner bag and an outer bag, the inner bag is located inside the outer bag, and the bag opening of the inner bag is fixedly connected to the bag opening of the outer bag, the space between the outer wall of the inner bag and the inner wall of the outer bag is set as a cavity, the cavity is evenly divided into a plurality of refrigeration chambers, the refrigeration chambers are evenly distributed in the cavity along the vertical direction, any two adjacent refrigeration chambers in the bag body are not connected to each other, a refrigerant bag and a reactant bag are fixedly installed in the refrigeration chamber, the refrigerant bag and the reactant bag are in contact with each other but not connected to each other, the refrigerant bag contains a refrigerant, and the reactant bag contains water as a reactant.

[0006] When working, since the space between the inner bag and the outer bag is evenly divided into multiple refrigeration chambers when the portable refrigeration food packaging bag is made, multiple refrigerant bags and reagent bags are placed in corresponding refrigeration chambers during production and processing, and the refrigeration food packaging bag is sealed, and only the bag opening is used to put in the food. For example, when buying seafood in a supermarket and taking it home or giving it to others as a gift, when it is necessary to transport high-value food such as fresh seafood that needs to be refrigerated for short distances at high temperature for tens of minutes to several hours, the high-value food is placed in a disposable portable refrigeration bag. In the cold food packaging bag, the bag mouth is sealed to ensure that the high-value food in the bag is kept in a refrigerated state at a relatively low temperature, thereby ensuring the freshness of the food. At the same time, before the food is put into the packaging bag, the portable refrigerated food packaging bag is squeezed. At this time, the reactant bag and the refrigerant bag in the refrigeration chamber are squeezed by the external pressure at the same time, and the reactant bag and the refrigerant bag are ruptured. The water in the reactant bag and the refrigerant in the refrigerant bag flow into the refrigeration chamber at the same time, and the two react in the refrigeration chamber. At the same time, since the reactant is water and the components of the refrigerant are sodium bicarbonate and biuret And dimethyl diurea, so the refrigerant dissolves in water in the refrigeration chamber to produce an endothermic reaction, thereby absorbing the surrounding heat to produce a refrigeration effect. At the same time, since the cavity is evenly divided into multiple refrigeration chambers in the vertical direction, the refrigerant and the reactant are evenly stored in the refrigerant bag and the reactant bag in each refrigeration chamber respectively. Therefore, the portable refrigeration food packaging bag can evenly cool the food in the bag when working, thereby improving the refrigeration effect of the portable refrigeration food packaging bag, avoiding excessively high temperature in a certain part, thereby affecting the freshness and quality of the food in the packaging bag. At the same time, since there are multiple refrigeration chambers and they are evenly distributed, When a refrigeration chamber is damaged due to an accident, resulting in the loss of refrigerant and reactant in the refrigeration chamber, the refrigerant and reactant in other refrigeration chambers are still stored intact in the refrigerant bags and reactant bags, thereby ensuring that the portable refrigeration food packaging bags can still be used, and the high-value food ingredients in the sealed packaging bags can still be preserved during non-cold chain transportation, avoiding the problem of refrigeration food packaging bags being unusable and needing to be remade due to the refrigerant leaking out after the refrigeration chamber is broken, thereby improving the refrigeration stability of portable refrigeration food packaging bags and saving the cost of transporting frozen and chilled foods.

[0007] Preferably, the outer bag is made of a metal film material, and air cavities are provided inside the outer bag, and the air cavities are evenly spaced along the circumference of the outer bag.

[0008] During operation, since the metal film has a certain reflective effect on external heat, during the short-distance non-cold chain transportation of the food in the packaging bag, the outer bag made of the metal film material can reduce the external heat entering the refrigerated food packaging bag, thereby improving the thermal insulation effect of the refrigerated food packaging bag, thereby improving the refrigeration effect of the refrigerated food packaging bag and extending the continuous refrigeration time of the refrigerated food packaging bag. At the same time, since an air cavity is opened inside the outer bag, and since air is a poor conductor of heat, the air cavity forms an insulating layer inside the outer bag, reducing the heat conducted from the outside to the refrigeration chamber, thereby ensuring the refrigeration effect of the refrigerated food packaging bag. At the same time, due to the existence of the air cavity, micro-striped protrusions are generated on the outer surface of the outer bag, so that the direct contact range between the refrigerated food packaging bag and the palm is converted from the outer surface of the entire outer bag to a micro-striped protrusion surface, thereby increasing the friction between the outer surface of the refrigerated food packaging bag and the palm, improving the gripping effect of the refrigerated food packaging bag, and avoiding accidental falling during transportation to cause damage to the food in the bag.

[0009] Preferably, the air cavity is filled with foamed polyurethane material.

[0010] During operation, the air cavity is filled with foamed polyurethane material. Since the foamed polyurethane material has better thermal insulation performance than air, the thermal insulation effect of the outer bag is further improved, and the heat conducted into the refrigeration chamber from the outside is further reduced, so that the refrigeration effect of the refrigerated food packaging bag is better. At the same time, since the foamed polyurethane material has excellent thermal insulation and certain elasticity, the foamed polyurethane material forms micro-striped protrusions on the outer surface of the outer bag after filling the air cavity. Therefore, when the food packaging bag accidentally falls, the elastic cushioning of the foamed polyurethane has a certain protection effect on the food in the bag, and the structural stability of the micro-striped protrusions formed on the surface of the packaging bag is improved by the filled foamed polyurethane material, thereby further improving the stability of the user when grasping the packaging bag, avoiding deformation of the air cavity and causing the user to slip when grasping the packaging bag.

[0011] Preferably, a plastic heat pipe is fixedly installed in the cavity, the refrigeration chamber is separated by the plastic heat pipe, the two ends of the plastic heat pipe are not connected, the plastic heat pipe is connected into a ring through a rubber block between the two ends, the plastic heat pipe is wrapped in a ring shape on the outer wall of the inner bag, and the plastic heat pipe is evenly distributed in the cavity along the vertical direction.

[0012] During operation, since the plastic heat pipe is installed in the cavity and the refrigeration chamber is separated by the plastic heat pipe, there are slight differences in temperature at different positions in the refrigeration chamber. At the same time, the plastic heat pipe is located between the two refrigeration chambers. At this time, since the plastic heat pipe has the characteristic of high heat conductivity, the plastic heat pipe transfers the heat from the relatively high temperature in the refrigeration chamber to the low temperature. Since the refrigerant and the reactant undergo an endothermic reaction and refrigeration produces a refrigeration effect, the heat transferred by the plastic heat pipe is absorbed by the refrigerant, thereby achieving a uniform refrigeration effect, ensuring that the temperature in the refrigeration chamber is balanced and low, and avoiding affecting the preservation effect of the food in the bag due to uneven refrigeration effect. Moreover, since the plastic heat pipe is wrapped in a ring shape on the outer wall of the inner bag and the plastic heat pipe is evenly distributed in the vertical direction, a cross-shaped grid is relatively formed between the plastic heat pipe and the air cavity, which further improves the strength of the food packaging bag and reduces damage to the food packaging bag during use.

[0013] Preferably, a drawstring hole is provided on the rubber block, a drawstring is provided in the cavity, and the drawstring passes through the drawstring hole and penetrates the refrigerant bag and the reactant bag.

[0014] During operation, when the food packaging bag needs to be refrigerated, the drawstring is pulled upward. Since the drawstring passes through the drawstring hole and penetrates the refrigerant bag and the reagent bag, when the drawstring moves upward, the refrigerant bag and the reagent bag penetrated by the drawstring move upward together with the upward movement of the drawstring, and then contact the upper surface of the refrigeration chamber, causing the refrigerant bag and the reagent bag to be squeezed and ruptured by the upper surface of the refrigeration chamber, thereby causing some of the refrigerant bags and reagent bags that have not been ruptured after the squeezing of the packaging bag to rupture, causing the refrigerant and the reagent to react in the refrigeration chamber, thereby ensuring that all the refrigerant bags and the reagent bags are completely ruptured, causing all the refrigerant and the reagent to react, and avoiding that some of the refrigerant bags and the reagent bags are not ruptured. Some of them are squeezed and cracked, and no reaction occurs, thus affecting the refrigeration effect and refrigeration uniformity of the refrigerated food packaging bag. At the same time, because the drawstring passes through the drawstring hole, when the drawstring is pulled upward, due to the elastic force of the rubber block itself, the inner wall of the drawstring hole is always close to the drawstring, thereby ensuring that the refrigeration chamber is always in a closed state, avoiding the refrigerant in each refrigeration chamber flowing out through the drawstring hole when the drawstring moves upward, thereby causing all the refrigerants to mix, resulting in uneven refrigeration effect, and at the same time avoiding the situation where when some refrigeration chambers are broken, all the refrigerants are mixed and flow out of the packaging bag from the broken refrigeration chamber, resulting in the food packaging bag being unable to refrigerate, thereby making the food packaging bag unable to be used normally.

[0015] Preferably, a plurality of card blocks are fixedly mounted on the pull rope, and the card blocks are all located in the reactant bag; in any refrigeration chamber in the cavity, the distance between the reactant bag and the bag opening is greater than the distance between the refrigerant bag and the bag opening.

[0016] During operation, when the pull rope moves upward, the block on the pull rope starts to move upward synchronously. During the upward movement, the block contacts the refrigerant bag and the reactant bag respectively, thereby causing the refrigerator bag and the reactant bag to rupture, so that the refrigerant and the reactant mix and react in the refrigeration chamber, further avoiding the refrigerant bag and the reactant bag in a certain refrigeration chamber from reacting without rupture, thereby causing the refrigeration effect to be reduced and the refrigeration unevenness to occur.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The portable refrigerated food packaging bag described in the present invention has multiple refrigeration chambers and multiple refrigerant bags and reactant bags are respectively installed in the refrigeration chambers, thereby avoiding the damage of the bag surface of the refrigerated food packaging bag with only a single refrigerant and a reactant during transportation, storage and use, resulting in the loss of refrigerant and thus affecting the refrigeration effect of the refrigerated food packaging bag, causing the food in the bag to deteriorate or the freshness to be affected, thereby improving the refrigeration stability and refrigeration uniformity of the refrigerated food packaging bag. At the same time, the provision of the drawstring and the card block avoids the problem of reduced refrigeration effect and uneven refrigeration due to the failure of the refrigerant bag and the reactant bag in a certain refrigeration chamber to rupture.

[0019] 2. The portable refrigerated food packaging bag described in the present invention uses an aluminum-plated metal film material to make an outer bag, and an air cavity is opened in the outer bag. The poor heat conduction property of air is used to reduce the transmission of external heat, forming a certain heat insulation effect, reducing the loss of cold air in the bag, and improving the refrigeration time of the portable refrigerated food packaging bag. At the same time, the air cavity is filled with foamed polyurethane material, which further improves the heat insulation effect. At the same time, the elasticity of the foamed polyurethane material can avoid the portable refrigerated food packaging bag from causing loss to the food in the bag when it is accidentally dropped. At the same time, the foamed polyurethane material is filled in the air cavity to form a micro-striped protrusion on the surface of the outer bag, which can provide a certain protection for the food in the bag when the food packaging bag is accidentally dropped, and the micro-striped protrusion also improves the gripping effect of the food packaging bag to prevent the food packaging bag from accidentally falling out of the hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle part;

[0023] In the figure: inner bag 1, outer bag 2, air cavity 21, cavity 3, refrigeration chamber 4, reactant bag 41, refrigerant bag 42, plastic heat pipe 5, heat-resistant rubber block 51, drawstring 6, and clamping block 61. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] like Figure 1 to Figure 2 As shown, a portable refrigerated food packaging bag described in the present invention comprises an inner bag 1 and an outer bag 2, wherein the inner bag 1 is located inside the outer bag 2, and the bag opening of the inner bag 1 is fixedly connected to the bag opening of the outer bag 2, and the space between the outer wall of the inner bag 1 and the inner wall of the outer bag 2 is set as a cavity 3, and the cavity 3 is evenly divided into a plurality of refrigeration chambers 4, and the refrigeration chambers 4 are evenly distributed in the cavity 3 along the vertical direction, and any two adjacent refrigeration chambers 4 in the bag body are not connected to each other, and a refrigerant bag 42 and a reactant bag 41 are fixedly installed in the refrigeration chamber 4, and the refrigerant bag 42 and the reactant bag 41 are in contact with each other but not connected to each other, and the refrigerant bag 42 contains a refrigerant, and the reactant bag 41 contains water as a reactant.

[0026] During operation, since the space between the inner bag 1 and the outer bag 2 is evenly divided into a plurality of refrigeration chambers 4 when the portable refrigeration food packaging bag is made, a plurality of refrigerant bags 42 and a reagent bag 41 are placed in the corresponding refrigeration chambers 4 during the manufacturing process, and the refrigeration food packaging bag is sealed, and only the bag opening is used to put in the food. For example, when buying seafood in a supermarket and taking it home or giving it as a gift to others, when high-value food such as fresh seafood that needs to be refrigerated needs to be transported for a short distance at high temperature for tens of minutes to several hours, the high-value food is placed in the refrigeration chamber 4. The portable refrigerated food packaging bag is put into the disposable portable refrigerated food packaging bag, and the bag mouth is sealed to ensure that the high-value food in the bag is kept in a refrigerated state at a relatively low temperature, thereby ensuring the freshness of the food. At the same time, before the food is put into the packaging bag, the portable refrigerated food packaging bag is squeezed. At this time, the reactant bag 41 and the refrigerant bag 42 in the refrigerating chamber 4 are squeezed by the external pressure at the same time, and the reactant bag 41 and the refrigerant bag 42 are ruptured. The water in the reactant bag 41 and the refrigerant in the refrigerant bag 42 flow into the refrigerating chamber 4 at the same time, and the two react in the refrigerating chamber 4. At the same time, due to the reaction The reactant is water, and the components of the refrigerant are sodium bicarbonate, biuret and dimethyl diurea. Therefore, the refrigerant dissolves in water in the refrigeration chamber 4 to produce an endothermic reaction, thereby absorbing the surrounding heat to produce a refrigeration effect. At the same time, since the cavity 3 is evenly divided into a plurality of refrigeration chambers 4 in the vertical direction, the refrigerant and the reactant are evenly stored in the refrigerant bag 42 and the reactant bag 41 in each refrigeration chamber, respectively. Therefore, the portable refrigeration food packaging bag can evenly refrigerate the food in the bag when working, thereby improving the refrigeration effect of the portable refrigeration food packaging bag. At the same time, since there are a plurality of refrigeration chambers 4 and they are evenly distributed, Therefore, when a refrigeration chamber 4 is damaged due to an accident, resulting in the loss of refrigerant and reactants in the refrigeration chamber 4, the refrigerants and reactants in other refrigeration chambers 4 are still stored intact in the refrigerant bag 42 and the reactant bag 41, thereby ensuring that the portable refrigeration food packaging bag can still be used, and has a fresh-keeping effect on frozen and refrigerated foods during non-cold chain transportation, avoiding the problem of the refrigeration food packaging bag being unusable and needing to be remade due to the refrigerant flowing out after the refrigeration chamber 4 is broken, thereby improving the refrigeration stability of the portable refrigeration food packaging bag, and saving the cost of transporting frozen and refrigerated foods.

[0027] As an embodiment of the present invention, the outer bag 2 is made of a metal film material, and an air cavity 21 is opened inside the outer bag 2 . The air cavities 21 are evenly spaced along the circumference of the outer bag 2 .

[0028] During operation, since the metal film has a certain reflective effect on external heat, during the short-distance non-cold chain transportation of the food in the packaging bag, the outer bag 2 made of the metal film material can reduce the external heat entering the refrigeration chamber 4, thereby improving the heat insulation effect of the refrigerated food packaging bag, thereby improving the refrigeration effect of the refrigerated food packaging bag and extending the continuous refrigeration time of the refrigerated food packaging bag. At the same time, since an air cavity 21 is opened inside the outer bag 2, and since air is a poor conductor of heat, the air cavity 21 forms a heat insulation layer inside the outer bag 2, reducing the heat conducted from the outside to the refrigeration chamber 4, thereby ensuring the refrigeration effect of the refrigerated food packaging bag. At the same time, due to the existence of the air cavity 21, micro-striped protrusions are generated on the outer surface of the outer bag 2, so that the direct contact range between the refrigerated food packaging bag and the palm is converted from the outer surface of the entire outer bag 2 to a micro-striped protrusion surface, thereby increasing the friction between the outer surface of the refrigerated food packaging bag and the palm, improving the gripping effect of the refrigerated food packaging bag, and avoiding accidental falling during transportation to cause damage to the food in the bag.

[0029] As an embodiment of the present invention, the air cavity 21 is filled with foamed polyurethane material.

[0030] During operation, the air cavity 21 is filled with a foamed polyurethane material. Since the foamed polyurethane material has better heat insulation performance than air, the heat insulation effect of the outer bag 2 is further improved, and the heat conducted from the outside to the refrigeration chamber 4 is further reduced, so that the refrigeration effect of the refrigerated food packaging bag is better. At the same time, since the foamed polyurethane material has excellent heat insulation and a certain elasticity, the foamed polyurethane material forms micro-striped protrusions on the outer surface of the outer bag 2 after filling the air cavity 21. As a result, when the food packaging bag accidentally falls, the elastic buffering of the foamed polyurethane has a certain protective effect on the food in the bag, and the structural stability of the micro-striped protrusions formed on the surface of the packaging bag is improved by the filled foamed polyurethane material, which further improves the stability of the user when grasping the packaging bag, and avoids deformation of the air cavity 21, which causes the user to slip when grasping the packaging bag.

[0031] As an embodiment of the present invention, a plastic heat pipe 5 is fixedly installed in the cavity 3, and the refrigeration chamber 4 is separated by the plastic heat pipe 5. The two ends of the plastic heat pipe 5 are not connected. The plastic heat pipe 5 is connected into a ring through a rubber block 51 between the two ends. The plastic heat pipe 5 is wrapped in a ring shape on the outer wall of the inner bag 1, and the plastic heat pipe 5 is evenly distributed in the cavity 3 along the vertical direction.

[0032] During operation, since the plastic heat pipe 5 is installed in the cavity 3 and the refrigeration chamber 4 is separated by the plastic heat pipe 5, there are slight differences in temperature at different positions in the refrigeration chamber 4. At the same time, the plastic heat pipe 5 is located between the two refrigeration chambers 4. At this time, since the plastic heat pipe 4 has the characteristic of high heat conductivity, the plastic heat pipe 5 transfers the heat from the relatively high temperature in the refrigeration chamber 4 to the low temperature. Since the refrigerant and the reactant undergo an endothermic reaction and refrigeration produces a refrigeration effect, the heat transferred by the plastic heat pipe 5 is absorbed by the refrigerant, thereby achieving a uniform refrigeration effect, ensuring that the temperature in the refrigeration chamber 4 is balanced and low, and avoiding the preservation effect of the food in the bag being affected by the uneven refrigeration effect. Moreover, since the plastic heat pipe 5 is wrapped in a ring shape on the outer wall of the inner bag 1, and the plastic heat pipe 5 is evenly distributed in the vertical direction, a cross-shaped grid is relatively formed between the plastic heat pipe 5 and the air cavity 21, which further improves the strength of the food packaging bag and reduces the damage of the food packaging bag during use.

[0033] As an embodiment of the present invention, a drawstring hole is provided on the rubber block 51 , a drawstring 6 is provided in the cavity 3 , and the drawstring 6 passes through the drawstring hole and penetrates the refrigerant bag 42 and the reactant bag 41 .

[0034] During operation, when the food packaging bag needs to be refrigerated, the drawstring 6 is pulled upward. Since the drawstring 6 passes through the drawstring hole and penetrates the refrigerant bag 42 and the reactant bag 41, when the drawstring 6 moves upward, the refrigerant bag 42 and the reactant bag 41 penetrated by the drawstring 6 move upward together with the upward movement of the drawstring 6, and then contact the upper surface of the refrigeration chamber 4, causing the refrigerant bag 42 and the reactant bag 41 to be squeezed and ruptured by the upper surface of the refrigeration chamber 4, thereby causing the refrigerant bag 42 and the reactant bag 41 that have not been ruptured after the partial squeezing of the packaging bag to rupture, causing the refrigerant and the reactant to react in the refrigeration chamber 4, thereby ensuring that all the refrigerant bags 42 and the reactant bags 41 are completely ruptured, causing all the refrigerants and the reactants to react, and avoiding partial refrigerant Bag 42 and reactant bag 41 are not squeezed and cracked, and no reaction occurs, which affects the refrigeration effect and refrigeration uniformity of the refrigerated food packaging bag. At the same time, since the drawstring 6 passes through the drawstring hole, when the drawstring 6 is pulled upward, due to the elastic force of the rubber block 51 itself, the inner wall of the drawstring hole is always close to the drawstring 6, thereby ensuring that the refrigeration chamber 4 is always in a closed state, avoiding the refrigerant in each refrigeration chamber 4 to flow out through the drawstring hole when the drawstring 6 moves upward, thereby causing all the refrigerants to mix, resulting in uneven refrigeration effect, and at the same time avoiding the situation when some refrigeration chambers 4 are broken due to the mixing of all the refrigerants and the flow out of the packaging bag from the broken refrigeration chamber 4, resulting in the inability of the food packaging bag to refrigerate, thereby making the food packaging bag unable to be used normally.

[0035] As an embodiment of the present invention, a plurality of blocks 61 are fixedly mounted on the pull rope 6, and the blocks 61 are all located in the reactant bag 41; in any refrigeration chamber 4 in the cavity 3, the distance between the reactant bag 41 and the bag opening is greater than the distance between the refrigerant bag 42 and the bag opening.

[0036] During operation, when the pull rope 6 moves upward, the block 61 on the pull rope 6 starts to move upward synchronously. During the upward movement, the block 61 contacts the refrigerant bag 42 and the reactant bag 41 respectively, thereby causing the refrigerator bag and the reactant bag 41 to rupture, so that the refrigerant and the reactant are mixed and reacted in the refrigeration chamber 4, further avoiding the refrigerant bag 42 and the reactant bag 41 in a certain refrigeration chamber 4 from reacting without rupture, thereby causing the refrigeration effect to be reduced and the refrigeration unevenness to occur.

[0037] The specific workflow is as follows:

[0038] During operation, since the space between the inner bag 1 and the outer bag 2 is evenly divided into a plurality of refrigeration chambers 4 when the portable refrigeration food packaging bag is made, a plurality of refrigerant bags 42 and a reagent bag 41 are placed in the corresponding refrigeration chambers 4 during the manufacturing process, and the refrigeration food packaging bag is sealed, and only the bag opening is used to put in the food. For example, when buying seafood in a supermarket and taking it home or giving it to others as a gift, when it is necessary to transport high-value food such as fresh seafood that needs to be refrigerated for short distances at high temperatures for tens of minutes to several hours, the high-value food is placed in a disposable portable refrigeration food packaging bag, and the bag opening is sealed to ensure that the high-value food in the bag is in a refrigerated state at a relatively low temperature. To ensure the freshness of the food, before putting the food into the packaging bag, the portable refrigerated food packaging bag is squeezed. At this time, the reactant bag 41 and the refrigerant bag 42 in the refrigerating chamber 4 are squeezed by the external pressure at the same time, and the reactant bag 41 and the refrigerant bag 42 are broken. The water in the reactant bag 41 and the refrigerant in the refrigerant bag 42 flow into the refrigerating chamber 4 at the same time, and the two react in the refrigerating chamber 4. At the same time, since the reactant is water, and the components of the refrigerant are sodium bicarbonate, biuret and dimethyl diurea, the refrigerant dissolves in water in the refrigerating chamber 4 to produce an endothermic reaction, thereby absorbing the surrounding heat to produce a refrigeration effect. The outer bag 2 is made of a metal film material, and an air cavity 21 is opened inside the outer bag 2. The existence of the air cavity 21 causes micro-striped protrusions to be generated on the outer surface of the outer bag 2. The air cavity 21 is filled with a foamed polyurethane material. After the foamed polyurethane material is filled with the air cavity 21, micro-striped protrusions are formed on the outer surface of the outer bag 2. The plastic heat pipe 5 is installed in the cavity 3, and the refrigeration chamber 4 is separated and formed by the plastic heat pipe 5. The plastic heat pipe 5 is annularly wrapped around the outer wall of the inner bag 1, and the plastic heat pipe 5 is evenly distributed in the vertical direction. A cross-shaped grid is formed between the plastic heat pipe 5 and the air cavity 21. The pull rope 6 is pulled upward. Since the pull rope 6 passes through the pull rope hole and penetrates the refrigerant bag 42 and the reactant bag 41, when the pull rope 6 moves upward, the refrigerant bag 42 and the reactant bag 41 penetrated by the pull rope 6 move upward with the pull rope 6. The drawstring 6 moves upward, and then contacts the upper surface of the refrigeration chamber 4, causing the refrigerant bag 42 and the reactant bag 41 to be squeezed and ruptured by the upper surface of the refrigeration chamber 4, thereby causing the refrigerant bag 42 and the reactant bag 41 that have not been ruptured after the partial squeezing of the packaging bag to rupture, so that the refrigerant and the reactant react in the refrigeration chamber 4, and the drawstring 6 passes through the drawstring hole. When the drawstring 6 is pulled upward, due to the elastic force of the rubber block 51 itself, the inner wall of the drawstring hole is always tightly attached to the drawstring 6, thereby ensuring that the refrigeration chamber 4 is always in a closed state. When the drawstring 6 moves upward, the block 61 located on the drawstring 6 starts to move upward synchronously. In the process of moving upward, the block 61 contacts the refrigerant bag 42 and the reactant bag 41 respectively, thereby causing the refrigeration bag and the reactant bag 41 to rupture.The refrigerant and the reactant are mixed and reacted in the refrigeration chamber 4.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A portable refrigerated food packaging bag, characterized in that: The invention comprises an inner bag (1) and an outer bag (2), wherein the inner bag (1) is located inside the outer bag (2), and the bag opening of the inner bag (1) is fixedly connected to the bag opening of the outer bag (2), the space between the outer wall of the inner bag (1) and the inner wall of the outer bag (2) is set as a cavity (3), the cavity (3) is evenly divided into a plurality of refrigeration chambers (4), the refrigeration chambers (4) are evenly distributed in the cavity (3) along the vertical direction, any two adjacent refrigeration chambers (4) in the bag body are not connected to each other, a refrigerant bag (42) and a reactant bag (41) are fixedly installed in the refrigeration chamber (4), the refrigerant bag (42) and the reactant bag (41) are in contact with each other but are not connected to each other, the refrigerant bag (42) contains a refrigerant, and the reactant bag (41) contains water as a reactant; The outer bag (2) is made of a metal film material, and an air cavity (21) is provided inside the outer bag (2), and the air cavities (21) are evenly spaced and distributed along the circumference of the outer bag (2); The air cavity (21) is filled with foamed polyurethane material; A plastic heat pipe (5) is fixedly installed in the cavity (3), the refrigeration chamber (4) is separated by the plastic heat pipe (5), the two ends of the plastic heat pipe (5) are not connected, the plastic heat pipe (5) is connected to form a ring through a rubber block (51) between the two ends, the plastic heat pipe (5) is wrapped in a ring shape on the outer wall of the inner bag (1), and the plastic heat pipe (5) is evenly distributed in the cavity (3) along the vertical direction; A drawstring hole is provided on the rubber block (51), a drawstring (6) is provided in the cavity (3), and the drawstring (6) passes through the drawstring hole and penetrates the refrigerant bag (42) and the reactant bag (41); A plurality of card blocks (61) are fixedly mounted on the pull rope (6), and the card blocks (61) are all located in the reactant bag (41); in any refrigeration chamber (4) in the cavity (3), the distance between the reactant bag (41) and the bag opening is greater than the distance between the refrigerant bag (42) and the bag opening.

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