Fruit freshness indicating box

Abstract

The utility model discloses a fruit freshness indicating box which comprises a box body used for storing fruits, a transparent plate body is arranged on the front side of the box body, a movable groove is formed in the lower side of the transparent plate body, a detection part is movably arranged in the movable groove, and a color changing piece used for detecting the PH value in the box body is arranged at the rear end of the detection part. The front side of the box body is provided with a contrast part used for conducting color contrast with the color changing piece. The color changing part detects the PH value in the box body and generates color changing reaction, the freshness can be visually displayed by comparing the color change of the color changing part with the contrast part, the color changing box is simple in structure, low in cost and suitable for shopping mall and supermarket and family scenes, real-time shelf life monitoring is achieved, and the food safety management efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of fruit freshness detection, and in particular to a freshness detection method. Background Technology

[0002] With increasing global awareness of food safety, consumers are demanding higher and higher standards of freshness for fruits and other perishable products. However, existing methods for detecting and monitoring fruit freshness have significant limitations.

[0003] Traditional freshness assessments primarily rely on laboratory physicochemical analyses, such as gas chromatography or high-performance liquid chromatography to detect the concentration of volatile gases like ethylene and carbon dioxide released from fruit, or mass spectrometry to analyze changes in fruit pulp composition. While these methods are highly accurate, they require specialized equipment and technicians, and the testing cycle can take several hours or even days. Furthermore, they are only suitable for sampling tests before shipment and cannot provide real-time monitoring of fruit during its shelf life or in home storage. Utility Model Content

[0004] The purpose of this invention is to provide a fruit freshness indicator box to solve the above-mentioned problems.

[0005] According to one aspect of the present invention, a fruit freshness indicator box is provided, comprising: a box body for storing fruit, a transparent plate provided on the front side of the box body, a movable groove provided on the lower side of the transparent plate, a detection part movably disposed in the movable groove, a color-changing element provided at the rear end of the detection part for detecting the pH value inside the box body, and a comparison part provided on the front side of the box body for color comparison with the color-changing element.

[0006] In some embodiments, the top of the box is covered with a lid.

[0007] In some embodiments, the detection unit further includes a slider and a connector, the connector being movably disposed within the movable groove, the slider being fixed to the outer end of the connector, and the color-changing component being fixed to the inner end of the connector.

[0008] In some embodiments, the slider and connector are transparent structures.

[0009] In some embodiments, the color-changing element includes a substrate on which a color-changing functional material is chelated to the surface.

[0010] In some embodiments, the substrate is a polyvinyl alcohol film, and the color-changing functional material is anthocyanin.

[0011] In some embodiments, the reference section is disposed below the movable groove, and the reference section includes a plurality of color reference cards arranged along the moving direction of the detection section, the colors of the color reference cards corresponding to the colors of each stage in the color-changing cycle of the color-changing component.

[0012] In some embodiments, rubber sealing strips are provided on both the upper and lower sides of the movable groove, and the connector moves between the rubber sealing strips on the upper and lower sides.

[0013] Compared with the prior art, the beneficial effects of this application are as follows:

[0014] Fruit loses moisture when stored in a box. With the box kept basically sealed, moisture can keep the color-changing component moist. Gas molecules come into contact with the color-changing component and undergo a color change. The color-changing component of this application detects the pH value inside the box and undergoes a color change reaction. By comparing the color change of the color-changing component with the control part, the freshness can be displayed intuitively. This application has a simple structure and low cost, and is suitable for supermarkets and home scenarios, realizing real-time monitoring of shelf life and improving the efficiency of food safety management. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the box lid after it is opened according to this utility model;

[0017] Figure 3 This is a schematic diagram of the detection unit of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] refer to Figures 1 to 3 This application provides a fruit freshness indicator box, including: a box body 1 for storing fruit, a transparent plate 2 provided on the front side of the box body 1, a movable groove 3 provided on the lower side of the transparent plate 2, a detection part 4 movably disposed in the movable groove 3, a color-changing element 5 for detecting the internal pH value of the box body 1 provided at the rear end of the detection part 4, and a comparison part 6 for color comparison with the color-changing element 5 provided on the front side of the box body 1.

[0020] In some embodiments, the top of the box body 1 is covered with a box cover 7.

[0021] In some embodiments, the detection unit 4 further includes a slider 8 and a connector 9. The connector 9 is movably disposed in the movable groove 3, the slider 8 is fixed to the outer end of the connector 9, and the color-changing component 5 is fixed to the inner end of the connector 9. The user can manually slide the slider 8 to move the detection unit 4 in the movable groove 3, so that the color-changing component 5 can be compared with the control unit 6.

[0022] In some implementations, the slider 8 and the connector 9 are transparent, allowing for a more direct observation of the color-changing element 5.

[0023] In some embodiments, the color-changing component 5 includes a substrate, the surface of which is chelated with a color-changing functional material.

[0024] In some embodiments, the substrate is a polyvinyl alcohol film, and the color-changing functional material is anthocyanin.

[0025] In some embodiments, the reference section 6 is disposed below the movable groove 3. The reference section 6 includes a plurality of color reference cards arranged along the moving direction of the detection section 4. The color of the color reference cards corresponds to the color of each stage in the color-changing cycle of the color-changing component 5.

[0026] In some embodiments, rubber sealing strips are provided on both the upper and lower sides of the movable groove 3, and the connector 9 moves between the rubber sealing strips on the upper and lower sides to improve the sealing performance of the box 1.

[0027] Ethylene released by fruits indirectly causes anthocyanin discoloration by promoting fruit respiration, leading to carbon dioxide accumulation and a decrease in pH.

[0028] The polyvinyl alcohol film of this application has a certain water content, and fruits and vegetables will lose moisture during storage. With the box 1 kept basically sealed, water vapor can keep the polyvinyl alcohol film moist. Gas molecules come into contact with the water-anthocyanin-substrate system on the polyvinyl alcohol film and complete the color change phenomenon thereon.

[0029] The usage process of this application is as follows: replace or reset the color-changing component 5, place the fruit to be tested in the box 1 and close the box lid 7. The color-changing component 5 monitors the concentration change of a specific gas in the box 1 in real time and changes color. At this time, the consumer can operate the sliding component 8 to make the detection unit 4 move horizontally on the movable groove 3. By observing the color-changing component 5 and the control unit 6, the freshness of the fruit can be intuitively understood.

[0030] When fruit is stored in box 1, it loses moisture. While keeping box 1 basically sealed, the moisture can keep the color-changing element 5 moist. Gas molecules come into contact with the color-changing element 5 and undergo a color change. The color-changing element 5 of this application detects the pH value inside box 1 and undergoes a color change reaction. The freshness can be intuitively displayed by comparing the color change of the color-changing element 5 with the control part 6. This application has a simple structure and low cost, and is suitable for supermarkets and home scenarios. It can realize real-time monitoring of shelf life and improve the efficiency of food safety management.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fruit freshness indicator box, characterized in that, include: A box for storing fruit has a transparent panel on the front side and a movable groove on the lower side of the transparent panel. A detection part is movably disposed in the movable groove. A color-changing component for detecting the pH value inside the box is disposed at the rear end of the detection part. A contrast part for color comparison with the color-changing component is disposed on the front side of the box.

2. The fruit freshness indicator box according to claim 1, characterized in that, The top of the box is covered with a lid.

3. The fruit freshness indicator box according to claim 1, characterized in that, The detection unit also includes a slider and a connector. The connector is movably disposed in the movable groove, the slider is fixed to the outer end of the connector, and the color-changing component is fixed to the inner end of the connector.

4. The fruit freshness indicator box according to claim 3, characterized in that, The sliding member and the connecting member are transparent.

5. The fruit freshness indicator box according to claim 1, characterized in that, The color-changing component includes a substrate, and the surface of the substrate is chelated with a color-changing functional material.

6. The fruit freshness indicator box according to claim 5, characterized in that, The substrate is a polyvinyl alcohol film, and the color-changing functional material is anthocyanin.

7. The fruit freshness indicator box according to claim 6, characterized in that, The reference section is located below the movable slot. The reference section includes a plurality of color reference cards arranged along the moving direction of the detection section. The color of the color reference cards corresponds to the color of each stage in the color-changing cycle of the color-changing component.

8. The fruit freshness indicator box according to claim 3, characterized in that, Rubber sealing strips are provided on both the upper and lower sides of the movable groove, and the connector moves between the rubber sealing strips on the upper and lower sides.

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