A natural air conditioning carton for fruit

Abstract

The utility model relates to a kind of fruit natural air conditioning carton, including box and upper cover, more than one fruit placing kit is provided in box, fruit placing kit includes the tray for supporting fruit and the barrier piece being set on tray, tray is box-like body with hollow cavity, barrier piece separates more than one independent accommodating cavity for placing fruit in the above of tray, tray is equipped with the air hole being communicated with hollow cavity, air hole includes the upper air hole being opened in tray top wall and the side air hole being opened in tray side wall, upper air hole is evenly dispersed below each independent accommodating cavity, support frame is provided between fruit placing kit and the inner wall of box, support frame is equipped with air passage and the through-hole for communicating air passage and side air hole, the opening of air passage is towards the inner wall of box, the inner wall of box is equipped with the selective gas-permeable membrane of the permeability to carbon dioxide being higher than the permeability to oxygen.The utility model can significantly prolong the fruit preservation period.

Description

Technical Field

[0001] This utility model relates to a modified atmosphere cardboard box for fruit products, belonging to the technical field of fruit packaging devices. Background Technology

[0002] Modified atmosphere packaging (MAP) boxes for fruits are made using special materials and packaging techniques. They can automatically regulate the air composition inside the box, creating a microenvironment conducive to preserving the fruit and thus extending its shelf life.

[0003] Chinese Patent Application No. 200710019004.4 discloses a method for preserving apples using a modified atmosphere packaging box. The method involves placing apples in a cardboard box with a bottom cardboard pad inside. Cardboard dividers separate the interior of the box, and apples are placed within these dividers. A top cardboard pad is then placed on top of the apples. The method is characterized by applying a coating to the inner surface of the cardboard box, attaching a selectively permeable film to the inner surface of the coating, and evenly laying packaging bags containing O2 absorbent, CO2 absorbent, ethylene absorbent, and moisture absorbent on the top cardboard pad. This cardboard box preservation method significantly improves the preservation quality and extends the shelf life of apples, maintaining a taste essentially the same as harvested apples. It is non-polluting, non-toxic, and fully meets hygienic food requirements, offering advantages such as convenient storage and transportation, low cost, high efficiency, and energy saving.

[0004] However, due to the obstruction of the cardboard divider and the top cardboard padding, the gas inside the carton does not circulate. Since the packaging bags for O2 absorbent, CO2 absorbent, ethylene absorbent, and moisture absorbent are placed on the top cardboard padding, the O2, CO2, ethylene, and moisture inside the carton cannot reach the packaging bags containing these absorbents in a short time. As a result, O2, CO2, ethylene, and moisture remain around the apples for a long time, and the effect of extending the shelf life is poor. Utility Model Content

[0005] The purpose of this invention is to provide a modified atmosphere packaging box for fruits, so as to solve the problem that the lack of gas circulation inside the modified atmosphere packaging box in the prior art leads to a poor effect in extending the shelf life.

[0006] To solve the above problems, the modified atmosphere packaging box for fruits involved in this utility model adopts the following technical solution: A modified atmosphere packaging box for fruits includes a box body and a top cover. The box body is provided with one or more fruit placement kits. The fruit placement kit includes a tray for supporting the fruit and a partition on the tray. The tray is a box-shaped body with a hollow cavity. The partition divides the upper part of the tray into one or more independent accommodating cavities for placing fruit. The tray is provided with ventilation holes communicating with the hollow cavities. The ventilation holes include upper ventilation holes opened on the top wall of the tray and side ventilation holes opened on the side wall of the tray. The upper ventilation holes are evenly distributed below each independent accommodating cavity. A support frame is provided between the fruit placement kit and the inner wall of the box body. The support frame is provided with air channels and through holes for communicating the air channels and the side ventilation holes. The opening of the air channels faces the inner wall of the box body. The inner wall of the box body is provided with a selectively permeable membrane with a higher permeability to carbon dioxide than to oxygen.

[0007] There is a gap between the support frame and the side edge of the box, and a connecting hole is provided on the support frame to connect the gap and the air passage.

[0008] An ethylene adsorption element and a moisture adsorption element are provided in the gap.

[0009] The ethylene adsorption element is a breathable bag encapsulating a potassium permanganate support, wherein the potassium permanganate support comprises a zeolite carrier and potassium permanganate; the moisture adsorption element is a breathable bag encapsulating calcium chloride.

[0010] The support frame is provided with several air passages, and the side walls of the air passages are provided with connecting holes that connect adjacent air passages.

[0011] The tray has one or more tray holes, which are located at the center of the independent receiving cavity.

[0012] The side wall of the box has one or more ventilation holes.

[0013] A breathable mesh is provided in the vent holes.

[0014] The inner top surface of the cover is also provided with a selectively breathable membrane.

[0015] A support plate is provided between the top and bottom walls of the tray, and ventilation holes are provided on the support plate.

[0016] The present invention discloses a box body containing one or more fruit placement kits. Each fruit placement kit includes a tray for supporting fruit and a partition on the tray. The tray is a box-shaped body with a hollow cavity. The partition divides the upper part of the tray into one or more independent accommodating cavities for placing fruit. The tray has ventilation holes communicating with the hollow cavities. The ventilation holes include upper ventilation holes on the top wall of the tray and side ventilation holes on the side wall of the tray. The upper ventilation holes are evenly distributed below each independent accommodating cavity. A support frame is provided between the fruit placement kit and the inner wall of the box body. The support frame has air channels and through holes for communicating the air channels and the side ventilation holes. The openings of the air channels face the inner wall of the box body. The inner wall of the box body is provided with a selectively permeable membrane with a higher permeability to carbon dioxide than to oxygen. Carbon dioxide and other gases produced by the fruit, placed in an independent containment chamber, flow into the hollow cavity of the tray through the top ventilation hole, and then sequentially into the air duct through the side ventilation holes on the tray and the through-holes on the support frame. The air then flows through the openings of the air duct towards the selectively permeable membrane. Similarly, external oxygen can also flow back towards the fruit through the selectively permeable membrane. The selectively permeable membrane allows carbon dioxide to escape rapidly from the chamber while limiting the rate at which external oxygen enters, creating and maintaining a high-carbon dioxide, low-oxygen environment inside the chamber. This effectively inhibits fruit respiration and ethylene production, thus significantly delaying the ripening and senescence process of the fruit and extending its shelf life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 for Figure 1 The main view; Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure; Figure 4 for Figure 1 A three-dimensional structural diagram with the box body and top cover removed; Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure of the middle tray; Figure 6 for Figure 5 The main view; Figure 7 for Figure 6 A schematic diagram of the BB cross-sectional structure; Figure 8 for Figure 1 A three-dimensional structural diagram of the central support frame.

[0018] In the diagram: 1. Box body; 2. Top cover; 3. Tray; 4. Partition; 5. Top ventilation port; 6. Side ventilation port; 7. Support frame; 8. Air duct; 9. Through hole; 10. Selective breathable membrane; 11. Gap; 12. Connection hole; 13. Ethylene adsorption component; 14. Moisture adsorption component; 15. Connecting hole; 16. Support hole; 17. Ventilation hole; 18. Breathable mesh; 19. Support plate; 20. Ventilation hole. Detailed Implementation

[0019] To make the technical objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model; that is, the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0021] Specific embodiments of the modified atmosphere packaging cardboard boxes for fruits involved in this utility model are described below. Figures 1-8The container has a body 1 and a top cover 2. The body 1 contains two fruit placement kits, one stacked on top of the other. Each fruit placement kit consists of a tray 3 for supporting the fruit and a partition 4 on the tray 3. The tray 3 is a box-shaped body with a hollow cavity. The partition 4 divides the top of the tray 3 into one or more independent cavities for placing fruit. Both the box-shaped tray 3 and the partition 4 act as cushioning elements, protecting the fruit and preventing bumps. The tray 3 has ventilation holes connecting to its hollow cavity. These ventilation holes are divided into an upper ventilation hole 5 on the top wall of the tray 3 and a side ventilation hole 6 on the side wall of the tray 3. Ventilation vents 5 are evenly distributed below each independent accommodating cavity. A support frame 7 is provided between the fruit placement kit and the inner wall of the box 1. The support frame 7 is used to protect the fruit placement kit, ensuring that it is stably placed in the box 1 and preventing it from shaking during handling or stacking. The support frame 7 is provided with air ducts 8 and through holes 9 for connecting the air ducts 8 and the side ventilation vents 6. The opening of the air ducts 8 faces the inner wall of the box 1. The inner wall of the box 1 is provided with a selectively permeable membrane 10, which has a higher permeability to carbon dioxide than to oxygen. The selectively permeable membrane 10 is made of polyethylene film filled with a large amount of calcium carbonate. The box 1 is made of corrugated cardboard, which is also breathable. In this way, a breathable channel is formed around the fruit and to the outer wall of the box 1, which allows gas to escape from the box 1 and allows outside gas to flow around the fruit. Carbon dioxide produced by the respiration of the fruit inside the chamber 1 escapes through this venting channel. Simultaneously, oxygen from the outside flows to the area around the fruit through the same channel, replenishing the oxygen consumed by the fruit's respiration. Because the selectively permeable membrane 10 has a higher permeability to carbon dioxide than to oxygen, it allows carbon dioxide to escape rapidly from the chamber 1 while limiting the rate at which oxygen enters. This creates and maintains a high-carbon dioxide, low-oxygen environment inside the chamber 1, effectively inhibiting the fruit's respiration and ethylene production. This significantly delays the ripening and senescence process of the fruit, extending its shelf life.

[0022] Working principle: The fruit inside the box 1 consumes oxygen and generates carbon dioxide through respiration. The carbon dioxide and other gases generated by the fruit's respiration are allowed to enter the hollow cavity of the tray 3 through the upper ventilation hole 5. Then, the carbon dioxide in the gas escapes from the hollow cavity of the tray 3 through the side ventilation hole 6. The carbon dioxide escaping through the side ventilation hole 6 enters the air passage 8 through the through hole 9 on the support frame 7 and flows to the selectively breathable membrane 10 through the opening of the air passage 8. Then, the carbon dioxide escapes from the box 1 relatively quickly through the selectively breathable membrane 10 and the outer wall of the box 1. At the same time, the oxygen from the outside slowly enters the air passage 8 on the support frame 7 through the outer wall of the box 1 and the selectively breathable membrane 10. Then, it enters the hollow cavity of the tray 3 through the through hole 9 and the side ventilation hole 6 in sequence, and finally flows to the area around the fruit through the upper ventilation hole 5. This creates and maintains a high carbon dioxide, low oxygen environment inside the box 1, which not only prevents the fruit inside the box 1 from rotting due to anaerobic respiration caused by excessively high carbon dioxide concentration and excessively low oxygen concentration, but also effectively inhibits the respiration of the fruit by creating and maintaining a high carbon dioxide, low oxygen environment inside the box 1.

[0023] Specifically, there are four support frames 7, which are distributed around the fruit placement kit. A gap 11 exists between the support frame 7 and the side edge of the box 1. A connecting hole 12 is provided on the support frame 7, connecting the gap 11 to the air duct 8. The gap 11 between the support frame 7 and the side edge of the box 1 is small, so it will not affect the stability of the support frame 7 and the fruit placement kit inside the box 1. The connecting hole 12 allows carbon dioxide produced by the fruit's respiration to enter the gap 11 between the support frame 7 and the side edge of the box 1 through the air duct 8.

[0024] Specifically, an ethylene adsorbent 13 and a moisture adsorbent 14 are provided in the gap 11. The ethylene adsorbent 13 is used to adsorb the ethylene released by the fruit, thereby inhibiting the ripening speed of the fruit and extending its shelf life; the moisture adsorbent 14 is used to adsorb the moisture in the box 1, reduce the humidity in the box 1, and prevent the growth of mold.

[0025] Specifically, the ethylene adsorption element 13 is a breathable bag encapsulating a potassium permanganate support, which includes a zeolite carrier and potassium permanganate; the moisture adsorption element 14 is a breathable bag encapsulating calcium chloride.

[0026] Specifically, the support frame 7 is provided with several air passages 8. The side walls of the air passages 8 provide support and prevent the support frame 7 from deforming due to compression. The side walls of the air passages 8 are provided with connecting holes 15 that connect adjacent air passages 8. The connecting holes 15 can connect each air passage 8, so that the ethylene gas and moisture in each air passage 8 can be easily absorbed by the ethylene adsorbent and the moisture adsorbent.

[0027] Specifically, the top wall of the tray 3 has one or more tray holes 16, which are respectively located in the center of the independent receiving cavity. The inner diameter of the tray hole 16 is smaller than the diameter of the fruit. The tray hole 16 is used to place the fruit, so that the fruit is placed more stably on the tray 3. At the same time, the carbon dioxide exhaled by the fruit and the ethylene released can also enter the hollow cavity of the tray 3 through the tray hole 16, and then escape from the selectively breathable membrane 10 or be adsorbed by the ethylene adsorbent.

[0028] Specifically, ventilation holes 17 are provided on both opposite side walls of the box 1. The ventilation holes 17 can quickly expel the heat generated by the respiration of the fruit from the box 1, preventing heat from accumulating inside the box 1 and accelerating the spoilage of the fruit; at the same time, they can also quickly expel the ethylene gas released by the fruit from the box 1, working in synergy with the ethylene adsorption element inside the box 1 to further extend the shelf life of the fruit.

[0029] Specifically, a breathable mesh 18 is provided in the vent 17, and the breathable mesh 18 is fixedly installed on the wall of the vent 17. The breathable mesh 18 does not affect the breathability of the vent 17, and also prevents insects and other small animals from entering the box 1 through the vent 17.

[0030] Specifically, a selectively breathable membrane 10 is also provided on the inner top surface of the top cover 2.

[0031] Specifically, a support plate 19 is provided between the top and bottom walls of the tray 3. A vent 20 is provided on the support plate 19. The vent 20 ensures that the hollow cavity is not blocked by the support plate 19, thus not interfering with the flow of gas in the hollow cavity. The support plate 19 is supported in the hollow cavity of the tray 3, which can prevent the tray 3 from being squeezed and deformed.

[0032] In the above embodiments, the box is provided with two fruit placement kits. In other embodiments, the box may also be provided with one fruit placement kit or three or more fruit placement kits.

[0033] In the above embodiments, there is a gap between the support frame and the side edge of the box, which is an optimized technical solution. In other embodiments, there may be no gap between the support frame and the side edge of the box.

[0034] In the above embodiments, an ethylene adsorbent and a moisture adsorbent are provided in the gap. In other embodiments, the ethylene adsorbent and the moisture adsorbent can also be provided in the air passage of the support frame.

[0035] In the above embodiments, one or more tray holes are provided on the top wall of the tray, which is an optimized technical solution. In other embodiments, tray holes may not be provided or the tray holes may be replaced with fruit holders provided on the tray.

[0036] In the above embodiments, ventilation holes are provided on the two opposite side walls of the box. In other embodiments, ventilation holes may be provided on all four side walls of the box.

[0037] In the above embodiments, a selectively breathable membrane is also provided on the inner top surface of the top cover. In other embodiments, a selectively breathable membrane may not be provided on the inner top surface of the top cover.

Claims

1. A modified atmosphere packaging carton for fruit, comprising a carton body and a lid, characterized in that, The box contains one or more fruit placement kits, each including a tray for supporting fruit and partitions on the tray. The tray is a box-shaped body with a hollow cavity. The partitions divide the upper part of the tray into one or more independent accommodating cavities for placing fruit. The tray has ventilation holes communicating with the hollow cavities. The ventilation holes include upper ventilation holes on the top wall of the tray and side ventilation holes on the side wall of the tray. The upper ventilation holes are evenly distributed below each independent accommodating cavity. A support frame is provided between the fruit placement kit and the inner wall of the box. The support frame has air channels and through holes for connecting the air channels and the side ventilation holes. The openings of the air channels face the inner wall of the box. The inner wall of the box is provided with a selectively permeable membrane with a higher permeability to carbon dioxide than to oxygen.

2. The modified atmosphere packaging box for fruits according to claim 1, characterized in that, There is a gap between the support frame and the side edge of the box, and a connecting hole is provided on the support frame to connect the gap and the air passage.

3. The modified atmosphere packaging box for fruits according to claim 2, characterized in that, An ethylene adsorption element and a moisture adsorption element are provided in the gap.

4. The modified atmosphere packaging box for fruits according to claim 3, characterized in that, The ethylene adsorption element is a breathable bag encapsulating a potassium permanganate support, wherein the potassium permanganate support comprises a zeolite carrier and potassium permanganate; the moisture adsorption element is a breathable bag encapsulating calcium chloride.

5. The modified atmosphere packaging box for fruits according to claim 4, characterized in that, The support frame is provided with several air passages, and the side walls of the air passages are provided with connecting holes that connect adjacent air passages.

6. The modified atmosphere packaging box for fruits according to claim 5, characterized in that, The tray has one or more tray holes, which are located at the center of the independent receiving cavity.

7. The modified atmosphere packaging carton for fruits according to any one of claims 1-6, characterized in that, The side wall of the box has one or more ventilation holes.

8. The modified atmosphere packaging box for fruits according to claim 7, characterized in that, A breathable mesh is provided in the vent holes.

9. The modified atmosphere packaging box for fruits according to claim 8, characterized in that, The inner top surface of the cover is also provided with a selectively breathable membrane.

10. The modified atmosphere packaging box for fruits according to claim 9, characterized in that, A support plate is provided between the top and bottom walls of the tray, and ventilation holes are provided on the support plate.

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