Fruit and vegetable fresh-keeping storage device capable of realizing humidity adjustment

Abstract

The utility model relates to the technical field of fresh-keeping devices, and discloses a fruit and vegetable fresh-keeping storage device capable of realizing humidity adjustment, which comprises a first thin film, a moisturizing interlayer and a second thin film which are sequentially arranged from inside to outside, the first thin film is a biodegradable breathable film, and the second thin film is a water-blocking film; a plurality of water absorption membranes are arranged in the moisturizing interlayer; the second film is a PE film and prevents water vapor from passing through; the first film is an oxygen barrier film, prevents oxygen from passing through and allows carbon dioxide gas and water vapor to pass through. A composite film structure is adopted, the first film on the inner layer is a biodegradable breathable film, oxygen can be effectively blocked, after water of fruits and vegetables is lost, the water enters the moisturizing interlayer through the first film, certain humidity is kept in the moisturizing interlayer, the humidity in the device is adjusted, water loss of the fruits and the vegetables is reduced, and the moisture content of the fruits and the vegetables is improved. Therefore, the shelf life of fruits and vegetables is prolonged, and the preservation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of preservation device technology, specifically to a fruit and vegetable preservation and storage device that can adjust humidity. Background Technology

[0002] During cold chain transportation and storage, fruits and vegetables need to be preserved and stored. Preservation and storage devices play an important role in maintaining the quality of fruits and vegetables and extending their storage time. Among them, the humidity environment inside the preservation and storage device has a key impact on the quality of the fruit.

[0003] In the prior art, such as utility model patent CN213863513U, a composite preservation film is disclosed, including a roll, a preservation film body, and a handy label. The preservation film body is tightly wound around the outer wall of the roll, and the handy label is evenly adhered to the surface of the center of the preservation film body. The preservation film body is a component composed of a first PE layer, a composite layer, and a second PE layer, with the composite layer sandwiched between the first and second PE layers. This preservation film uses PE film to adhere to the surface of fruits and vegetables to prevent moisture loss, thus achieving a preservation effect. However, in actual use, moisture easily accumulates inside the PE film, breeding a large number of bacteria and causing the fruits and vegetables to rot.

[0004] Therefore, it is necessary to propose a fruit and vegetable preservation and storage device that can adjust humidity, so as to at least partially solve the problems existing in the prior art. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To address the aforementioned problems, this utility model discloses a fruit and vegetable preservation and storage device capable of humidity adjustment; it includes:

[0007] The first film, the moisturizing interlayer, and the second film are arranged sequentially from the inside out. The first film is a biodegradable breathable film, and the second film is a water-resistant film. Multiple water-absorbing membranes are arranged inside the moisturizing interlayer.

[0008] Preferably, the second film is a PE film, which prevents water vapor from passing through.

[0009] Preferably, the first film is configured as an oxygen barrier film, which prevents oxygen from passing through but allows carbon dioxide gas and water vapor to pass through.

[0010] Preferably, the thickness of the first and second films is set to 5–8 μm.

[0011] Preferably, the thickness of the moisturizing interlayer is set to 5–9 μm.

[0012] Preferably, the absorbent membrane is connected to both sides of the first and second films simultaneously, and the area of ​​the absorbent membrane covering the first film does not exceed 1 / 4.

[0013] Preferably, an antistatic layer is provided on the inner side of the second film.

[0014] Preferably, the absorbent membrane is a superabsorbent polymer membrane.

[0015] Preferably, a first conical hole is provided on the second film, and a second conical hole is provided on the absorbent film, with the first conical hole and the second conical hole connected to form an absorbent channel.

[0016] Preferably, the outer diameters of both the first and second conical holes are larger than their inner diameters.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] This invention provides a fruit and vegetable preservation and storage device with adjustable humidity. The device adopts a composite film structure. The inner first film is a biodegradable breathable film, which improves the barrier to oxygen and creates a low-oxygen environment inside the film, significantly reducing the respiration of fruits and vegetables and putting them into a dormant state. The second film has a very high barrier to water mist or droplets, allowing moisture to remain in the moisturizing interlayer and maintaining a certain humidity level inside the interlayer. This allows for the adjustment of the humidity inside the device, reducing moisture loss from fruits and vegetables, thereby extending the shelf life of fruits and vegetables and improving the preservation effect. Multiple water-absorbing membranes are set in the moisturizing interlayer. Under the water absorption of the water-absorbing membranes, moisture from fruits and vegetables can more easily enter and accumulate in the moisturizing interlayer, reducing water accumulation inside the first film.

[0019] The present invention provides a fruit and vegetable preservation and storage device capable of humidity adjustment. Other advantages, objectives and features of the present invention will be partly apparent from the following description, and partly understood by those skilled in the art through research and practice of the present invention. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the first cross-sectional structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the second cross-sectional structure of the present invention.

[0024] In the figure: 1. First film; 2. Second film; 3. Moisturizing interlayer; 4. Water-absorbing membrane; 5. First conical hole; 6. Second conical hole. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Example

[0027] The present invention will now be further described with reference to the accompanying drawings.

[0028] like Figures 1-3 As shown in the figure, this embodiment provides a fruit and vegetable preservation and storage device capable of humidity adjustment, comprising:

[0029] The first film 1, the moisturizing interlayer 3, and the second film 2 are arranged sequentially from the inside to the outside. The first film 1 is a biodegradable breathable film, and the second film 2 is a water-resistant film. Multiple water-absorbing membranes 4 are arranged inside the moisturizing interlayer 3.

[0030] The second film 2 is a PE film, which prevents water vapor from passing through.

[0031] The first membrane 1 is configured as an oxygen barrier membrane, which prevents oxygen from passing through but allows carbon dioxide gas and water vapor to pass through.

[0032] The working principle and beneficial effects of this utility model are as follows:

[0033] This embodiment provides a fruit and vegetable preservation and storage device capable of humidity adjustment. The device adopts a composite film structure. In use, the fruits and vegetables are sealed inside the first film 1. The first film 1 effectively ensures water permeation while providing a strong barrier against oxygen. During the respiration process of the fruits and vegetables, the remaining oxygen in the first film 1 is converted into carbon dioxide, creating a low-oxygen environment within the film. This significantly reduces the respiration of the fruits and vegetables, putting them in a dormant state and extending their shelf life. After the fruits and vegetables lose moisture, it passes through the first film 1 into the moisturizing interlayer 3. The second film 2 has a very high barrier against water mist or droplets, keeping the moisture within the moisturizing interlayer 3 and maintaining a certain humidity level, thus reducing moisture loss and extending the shelf life of the fruits and vegetables. Multiple water-absorbing membranes 4 are installed inside the moisturizing interlayer 3. Under the water-absorbing effect of the water-absorbing membranes 4, moisture from the fruits and vegetables can more easily enter and accumulate in the moisturizing interlayer 3, reducing moisture inside the first film 1.

[0034] Among them, the first film 1 is a biodegradable breathable membrane. The biodegradable breathable membrane can be, for example, the biodegradable breathable membrane disclosed in the patent document with publication number CN114573963B, which has the characteristics of high permeability of carbon dioxide and water vapor and low permeability of oxygen. It is biodegradable and has good safety and environmental protection performance.

[0035] In one embodiment, the thickness of the first film 1 and the second film 2 is set to 5 to 8 μm.

[0036] In one embodiment, the thickness of the moisturizing interlayer 3 is set to 5–9 μm.

[0037] The working principle and beneficial effects of the above technical solution are as follows:

[0038] A moisturizing interlayer 3 of a certain thickness is formed between the first film 1 and the second film 2, so that it has enough space to accommodate water mist or water droplets, better store the moisture lost by fruits and vegetables, and thus ensure the humidity inside the moisturizing interlayer 3.

[0039] In one embodiment, the absorbent membrane 4 is configured as a superabsorbent polymer membrane.

[0040] The working principle and beneficial effects of the above technical solution are as follows:

[0041] Superabsorbent polymer (SAP) is a typical functional polymer material; it can absorb hundreds or even thousands of times its own weight in water and has a strong water retention capacity.

[0042] In one embodiment, the absorbent membrane 4 is connected to both sides of the first film 1 and the second film 2 simultaneously, and the area of ​​the absorbent membrane 4 covering the first film 1 does not exceed 1 / 4.

[0043] The working principle and beneficial effects of the above technical solution are as follows:

[0044] Under the water-absorbing action of the absorbent membrane 4, some of the water in the fruits and vegetables enters the gap between the first membrane 1 and the second membrane 2, while some enters and accumulates within the absorbent membrane 4. The area of ​​the absorbent membrane 4 is controlled within a preset range, which helps water from the fruits and vegetables enter the moisturizing interlayer 3 without excessive absorption, allowing water to be preferentially distributed within the gap between the inner and outer membranes, thus improving the uniformity of water distribution within the moisturizing interlayer 3. The absorbent membrane 4 provides support between the second membrane 2 and the first membrane 1, facilitating the formation of the moisturizing interlayer 3; and forms multiple connection points to ensure the relative flatness of the inner and outer membranes.

[0045] In one embodiment, an antistatic layer is provided on the inner side of the second film 2.

[0046] The working principle and beneficial effects of the above technical solution are as follows:

[0047] An antistatic layer is provided on the inner side of the second film 2. The antistatic layer is made of polyimide material to reduce the static electricity between the first film 1 and the second film 2. This prevents the first film 1 and the second film 2 from sticking together due to static adsorption, which would compress the space of the moisturizing interlayer 3, resulting in a smaller amount of water mist or water droplets that can be contained, or excessive local water accumulation, thus ensuring the moisturizing effect of the device.

[0048] In one embodiment, a first conical hole 5 is provided on the second film 2, and a second conical hole 6 is provided on the absorbent film 4. The first conical hole 5 and the second conical hole 6 are connected to form an absorbent channel.

[0049] The outer diameters of both the first conical hole 5 and the second conical hole 6 are larger than their inner diameters.

[0050] The working principle and beneficial effects of the above technical solution are as follows:

[0051] The absorbent membrane 4 is equipped with a conical absorbent channel with a large outer diameter, allowing moisture from the external environment to enter the absorbent membrane 4 through the absorbent channel and replenish the moisture-retaining layer 3. Meanwhile, water on the moisture-retaining layer 3 and the absorbent membrane 4 does not easily flow out through the absorbent channel. When the moisture in the moisture-retaining layer 3 is low, it replenishes moisture by absorbing moisture from the environment, thereby adjusting the humidity in the moisture-retaining layer 3, reducing moisture loss from fruits and vegetables, and extending the shelf life of fruits and vegetables.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A fruit and vegetable preservation and storage device capable of humidity adjustment, characterized in that, include: The first film (1), the moisturizing interlayer (3), and the second film (2) are arranged sequentially from the inside to the outside. The first film (1) is a biodegradable breathable film, and the second film (2) is a water-resistant film. Multiple water-absorbing membranes (4) are arranged inside the moisturizing interlayer (3).

2. The fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, The second film (2) is a PE film, which prevents water vapor from passing through.

3. The fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, The first membrane (1) is configured as an oxygen barrier membrane, which prevents oxygen from passing through and allows carbon dioxide gas and water vapor to pass through.

4. The fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, The thicknesses of the first film (1) and the second film (2) are set to 5–8 μm.

5. A fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, The thickness of the moisturizing interlayer (3) is set to 5–9 μm.

6. The fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, The absorbent membrane (4) is connected to the first film (1) and the second film (2) on both sides, and the area of ​​the absorbent membrane (4) covering the first film (1) does not exceed 1 / 4.

7. A fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, An antistatic layer is provided on the inner side of the second film (2).

8. A fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, The absorbent membrane (4) is set as a superabsorbent polymer membrane.

9. A fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 1, characterized in that, The second membrane (2) has a first conical hole (5) and the absorbent membrane (4) has a second conical hole (6). The first conical hole (5) and the second conical hole (6) are connected to form an absorbent channel.

10. A fruit and vegetable preservation and storage device capable of humidity adjustment according to claim 9, characterized in that, The outer diameters of both the first conical hole (5) and the second conical hole (6) are larger than their inner diameters.

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