CN114279133A - Refrigerator with a door - Google Patents
Refrigerator with a door Download PDFInfo
- Publication number
- CN114279133A CN114279133A CN202111629601.5A CN202111629601A CN114279133A CN 114279133 A CN114279133 A CN 114279133A CN 202111629601 A CN202111629601 A CN 202111629601A CN 114279133 A CN114279133 A CN 114279133A
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- Prior art keywords
- freshness
- meat
- magnetic field
- refrigerator
- color
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- 235000013372 meat Nutrition 0.000 claims abstract description 68
- 235000013622 meat product Nutrition 0.000 claims abstract description 55
- 230000001954 sterilising effect Effects 0.000 claims abstract description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 5
- 150000001412 amines Chemical class 0.000 claims description 13
- 230000000035 biogenic effect Effects 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 11
- 239000004410 anthocyanin Substances 0.000 claims description 9
- 229930002877 anthocyanin Natural products 0.000 claims description 9
- 235000010208 anthocyanin Nutrition 0.000 claims description 9
- 150000004636 anthocyanins Chemical class 0.000 claims description 9
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 235000012424 soybean oil Nutrition 0.000 claims description 4
- 239000003549 soybean oil Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229920000223 polyglycerol Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- WBHHMMIMDMUBKC-QJWNTBNXSA-M ricinoleate Chemical compound CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O WBHHMMIMDMUBKC-QJWNTBNXSA-M 0.000 claims description 3
- 229940066675 ricinoleate Drugs 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 235000013305 food Nutrition 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 241000220317 Rosa Species 0.000 description 2
- 229930014669 anthocyanidin Natural products 0.000 description 2
- 150000001453 anthocyanidins Chemical class 0.000 description 2
- 235000008758 anthocyanidins Nutrition 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 235000015241 bacon Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002189 fluorescence spectrum Methods 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 nitrogen-containing low-molecular-weight compounds Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000021067 refined food Nutrition 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The embodiment of the application provides a refrigerator. The refrigerator comprises a meat storage chamber, wherein a freshness indication label and a magnetic field generating device are arranged in the meat storage chamber; the freshness indication label is used for detecting the freshness of the meat products in the meat storage chamber, and when the freshness of the meat products in the meat storage chamber changes, the color of the freshness indication label changes; the magnetic field generating device can generate a magnetic field for sterilization. The refrigerator that this application embodiment provided, through set up new freshness instruction label and magnetic field generating device in refrigerator inside, make the user can judge the new freshness of the meat product of storage in the refrigerator according to the colour change of new freshness instruction label, avoid the user to eat the meat product that has rotten by mistake and lead to appearing food safety problem, in addition, the magnetic field generating device that sets up in the refrigerator can produce magnetic field and carry out the degerming to extension meat product's fresh-keeping time.
Description
Technical Field
The application relates to the technical field of food preservation, in particular to a refrigerator.
Background
The existing refrigerator cannot realize long-term fresh keeping of meat products (such as fresh meat), and cannot prompt a user whether the meat products stored in the refrigerator are fresh or not.
Disclosure of Invention
The embodiment of the application provides a refrigerator, can utilize freshness indicator label to indicate the freshness of the meat product of storing in the refrigerator, can utilize the magnetic field that magnetic field generating device produced to disinfect simultaneously to the fresh-keeping time of extension meat product.
In a first aspect, an embodiment of the present application provides a refrigerator, including a meat storage compartment, in which a freshness indication tag and a magnetic field generation device are disposed;
the freshness indication label is used for detecting the freshness of the meat products in the meat storage chamber, and when the freshness of the meat products in the meat storage chamber changes, the color of the freshness indication label changes;
the magnetic field generating device can generate a magnetic field for sterilization.
In some embodiments, a color difference sensor is further disposed in the meat storage chamber, and the refrigerator further comprises a control device;
the freshness indication label, the color difference sensor and the magnetic field generating device are respectively connected with the control device;
the color difference sensor is used for monitoring the color change of the freshness indication label and transmitting the color of the freshness indication label to the control device;
the control device can judge the freshness of the meat products in the meat storage chamber based on the color of the freshness indication label, and can regulate and control the magnetic field intensity generated by the magnetic field generation device based on the freshness of the meat products in the meat storage chamber.
In some embodiments, the control device controls the magnetic field generating device to increase the intensity of the magnetic field generated by the magnetic field generating device when the freshness of the meat product in the meat storage compartment decreases.
In some embodiments, the control device controls the magnetic field generating device to stop operating when the control device determines that the meat product in the meat storage compartment has deteriorated based on the color of the freshness indication label.
In some embodiments, the refrigerator further comprises an alarm device connected to the control device, and the control device controls the alarm device to give an alarm signal when the control device determines that the meat food in the meat storage compartment has deteriorated based on the color of the freshness indication label.
In some embodiments, the freshness-indication label is configured to detect a concentration of biogenic amine in air within the meat storage compartment, and the color of the freshness-indication label changes when the concentration of biogenic amine changes.
In some embodiments, the freshness-indicating label includes a substrate and anthocyanins dispersed in the substrate.
In some embodiments, the freshness-indicating label is made by applying an indicating solution to a substrate, the indicating solution comprising anthocyanins, a solvent and an emulsifier.
In some embodiments, the solvent is soybean oil, the emulsifier is polyglycerol ricinoleate, and the substrate comprises at least one of starch and polyvinyl alcohol.
In a second aspect, an embodiment of the present application provides a refrigerator, including a meat storage compartment, in which a freshness indication label is disposed, where the freshness indication label includes a base material and anthocyanidin dispersed in the base material.
The refrigerator that this application embodiment provided, through set up new freshness instruction label and magnetic field generating device in refrigerator inside, make the user can judge the new freshness of the meat product of storage in the refrigerator according to the colour change of new freshness instruction label, avoid the user to eat the meat product that has rotten by mistake and lead to appearing food safety problem, in addition, the magnetic field generating device that sets up in the refrigerator can produce magnetic field and carry out the degerming to extension meat product's fresh-keeping time.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic view of a first partial structure of a refrigerator according to an embodiment of the present application.
Fig. 2 is a schematic view of a second partial structure of a refrigerator according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a third part of a refrigerator provided in an embodiment of the present application.
FIG. 4 is a schematic diagram of the color change of the freshness indicator label according to the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic view of a first partial structure of a refrigerator according to an embodiment of the present application. The embodiment of the application provides a refrigerator 100, including the meat storeroom, be equipped with freshness indicator tag 10 in the meat storeroom, freshness indicator tag 10 is used for detecting the freshness of the meat product in the meat storeroom, and when the freshness of the meat product in the meat storeroom changes, freshness indicator tag 10's colour changes. That is, the color of the freshness indication label 10 can be changed according to the change of the freshness of the meat product, and therefore, when the user opens the refrigerator 100 to see the color of the freshness indication label 10, it can be determined whether the freshness of the meat product in the meat storage compartment is high or low or whether deterioration has occurred according to the correspondence between the color of the freshness indication label 10 and the freshness of the meat product.
Illustratively, the meat product may be fresh meat or a meat processed food (e.g., ham, sausage, bacon, meat cans, etc.).
Illustratively, the meat storage compartment may be a separate compartment in the refrigerator 100.
It should be noted that the meat storage room can be used not only for storing meat products but also for storing other food products (e.g., vegetables) or non-food items, but it is understood that the freshness of the non-meat food products and/or non-food items stored in the meat storage room cannot be determined by the freshness indication label 10.
The meat storage chamber may further include a magnetic field generator 20, and the magnetic field generator 20 may generate a magnetic field for sterilization. That is, by providing the magnetic field generating device 20, bacteria in the meat storage compartment can be reduced or completely removed, thereby prolonging the freshness keeping time of the meat products.
The refrigerator 100 provided by the above embodiment, through setting up the freshness indicator tag 10 and the magnetic field generator 20 in the refrigerator 100, make the user can judge the freshness of the meat food stored in the refrigerator 100 according to the color change of the freshness indicator tag 10, avoid the food safety problem caused by the fact that the user eats the deteriorated meat food by mistake, in addition, the magnetic field generator 20 arranged in the refrigerator 100 can generate the magnetic field for degerming, thereby prolonging the fresh-keeping time of the meat food.
Referring to fig. 2, fig. 2 is a schematic view of a second partial structure of a refrigerator according to an embodiment of the present application. A color difference sensor 40 can be arranged in the meat storage chamber, and the refrigerator 100 can also comprise a control device 30; the freshness indication label 10, the color difference sensor 40 and the magnetic field generating device 20 may be connected to the control device 30, respectively; the color difference sensor 40 is used for monitoring the color change of the freshness indication label 10 and transmitting the color of the freshness indication label 10 to the control device 30; the control device 30 can judge the freshness of the meat product in the meat storage compartment based on the color of the freshness indication label 10, and can regulate and control the intensity of the magnetic field generated by the magnetic field generating device 20 based on the freshness of the meat product in the meat storage compartment.
It is understood that the control device 30 may be disposed inside or outside the meat storage chamber.
In some embodiments, the control device 30 controls the magnetic field generating device 20 to increase the intensity of the magnetic field generated by the magnetic field generating device 20 when the freshness of the meat product in the meat storage compartment decreases. It can be understood that when the intensity of the magnetic field is increased, the sterilization capability of the magnetic field is also enhanced, so that the deterioration speed of the meat products can be delayed, and the preservation time of the meat products can be prolonged.
For example, an application program for controlling the intensity of the magnetic field emitted by the magnetic field generating device 20 may be provided in the control device 30, and the application program may determine the freshness of the meat product based on a function B ═ f (Y), where Y is the freshness of the meat product, and B is the intensity of the magnetic field emitted by the magnetic field generating device 20, and the intensity of the magnetic field B gradually increases as the freshness Y gradually decreases.
For example, an application program for recording the correspondence between the color of the freshness indication label 10 and the freshness of the meat product may be further provided in the control device 30, and the application program may determine the freshness of the meat product based on a function Y ═ f (X), where X is the color value of the color of the freshness indication label 10, and Y is the freshness of the meat product, and as the color value X changes, the freshness Y corresponding thereto also changes continuously.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a third portion of a refrigerator according to an embodiment of the present application. The refrigerator 100 may further include an alarm device 50, the alarm device 50 being connected to the control device 30, the control device 30 controlling the alarm device 50 to emit an alarm signal when the control device 30 determines that the meat item in the meat storage compartment has deteriorated based on the color of the freshness indication label 10. It can be understood that, since the color difference sensor 40 can monitor the color of the freshness indication label 10 and transmit the color signal to the control device 30, and meanwhile, an application program for recording the correspondence between the color of the freshness indication label 10 and the freshness of the meat product is provided in the control device 30, when the control device 30 determines that the meat product in the meat storage compartment has deteriorated based on the color of the freshness indication label 10, the alarm device 50 can be controlled to send out an alarm signal to prompt the user to timely process the deteriorated meat product, thereby ensuring the sanitary condition inside the refrigerator 100, and meanwhile, preventing the occurrence of food safety problems. That is, a user using the refrigerator 100 of the embodiment of the present application can determine whether the meat-based food in the refrigerator 100 is fresh by observing the color of the freshness indication label 10 with naked eyes, and also can determine whether the meat-based food in the refrigerator 100 has deteriorated by determining whether the refrigerator 100 emits an alarm signal.
Illustratively, the alarm signal may comprise a color and/or sound signal.
Illustratively, when the control device 30 determines that the freshness Y of the meat product is less than the threshold Y based on the color of the freshness indication label 10 monitored by the color difference sensor 40minWhen the meat is deteriorated, the control device 30 may control the alarm device 50 to send an alarm signal to remind the user that the meat is deteriorated and inedible, and at this time, the control device 30 may control the magnetic field generating device 20 to stop working, so that the magnetic field is not generated any more, thereby avoiding the waste of energy and reducing the power consumption of the refrigerator 100.
Illustratively, the meat storage chamber may have an upper cover plate and a bottom plate disposed opposite to each other, and the magnetic field generating device 20 is mounted on the upper cover plate. It will be appreciated that the meat product may be placed on the floor of the meat storage compartment for storage.
Illustratively, the magnetic field generating device 20 may include a coil, and the material of the coil may include at least one of copper and aluminum.
The magnetic field generating device 20 may generate a magnetic field using an ac power source or a dc power source.
In some embodiments, the freshness-indication label 10 can be used to detect the concentration of biogenic amine in the air within the meat storage compartment, and as the concentration of biogenic amine changes, the color of the freshness-indication label 10 changes. That is, the freshness indicator 10 is a biogenic amine sensitive indicator, and the operation principle of the biogenic amine sensitive indicator is as follows: in the process of meat product spoilage, proteins, esters and the like in the meat product are gradually decomposed under the action of bacteria and enzymes, and volatile substances such as nitrogen-containing low-molecular-weight compounds are further generated, most of the volatile substances are biogenic amines, and the biogenic amines change the color of pigments in the indicator label, so that the freshness of the meat product is indicated according to the color change.
Illustratively, freshness-indicating label 10 includes a substrate and anthocyanins dispersed in the substrate. Illustratively, the substrate may include at least one of starch and polyvinyl alcohol.
It should be noted that the anthocyanidin is sensitive to pH change, and may present different molecular structures and colors under different pH conditions, and biogenic amine may volatilize along with putrefaction of the meat product during the storage process of the meat product, and biogenic amine is an alkaline substance, and the higher the concentration of biogenic amine in the meat storage chamber, the higher the pH value is, and along with the increase of the pH of the air in the meat storage chamber, the color of the freshness indication label 10 gradually changes from rose red to blue, and the freshness of the meat product gradually changes from fresh to stale, so that a user may judge the freshness of the meat product according to the color of the freshness indication label 10 to determine whether the meat product in the refrigerator 100 can be eaten or not.
Illustratively, freshness indicator label 10 can be made by applying an indicating solution to a substrate, the indicating solution comprising anthocyanins, a solvent, and an emulsifier. Wherein the solvent can be soybean oil, the emulsifier can be polyglycerol ricinoleate, and the emulsifier can mix anthocyanin and soybean oil to form stable emulsion. The "application" may be by coating, dipping, spraying, printing, and the like. The freshness indication label 10 manufactured in this way can be kept relatively stable in the internal environment of the refrigerator 100, and anthocyanins do not bleed out from the freshness indication label 10 even under a high humidity environment.
Referring to fig. 4, fig. 4 is a schematic view illustrating a color change of a freshness indicator label according to an embodiment of the present application. It can be seen that the color of the freshness indicator label 10 changes with the freshness of the meat product, and the color of the freshness indicator label 10 gradually changes from rose red to blue as the freshness of the meat product gradually changes from fresh to stale.
The existing meat freshness nondestructive detection method generally comprises a computer vision technology, a visible/infrared spectrum technology, a hyperspectral technology, a Raman spectrum technology, a fluorescence spectrum technology, an electrochemical method, an odor visualization technology and the like, and the technologies have the following problems in application: most of the detection technologies need professional equipment and instruments, are high in cost and cannot be used for civilization, and even cannot be applied to the refrigerator 100.
The freshness indicator label 10 adopted in the embodiment of the present application has high feasibility in application in the refrigerator 100 due to its advantages of small size, low cost, etc.
The refrigerator provided by the embodiment of the application is described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The refrigerator is characterized by comprising a meat storage chamber, wherein a freshness indication label and a magnetic field generating device are arranged in the meat storage chamber;
the freshness indication label is used for detecting the freshness of the meat products in the meat storage chamber, and when the freshness of the meat products in the meat storage chamber changes, the color of the freshness indication label changes;
the magnetic field generating device can generate a magnetic field for sterilization.
2. The refrigerator of claim 1, wherein a color difference sensor is further disposed in the meat storage compartment, the refrigerator further comprising a control device;
the freshness indication label, the color difference sensor and the magnetic field generating device are respectively connected with the control device;
the color difference sensor is used for monitoring the color change of the freshness indication label and transmitting the color of the freshness indication label to the control device;
the control device can judge the freshness of the meat products in the meat storage chamber based on the color of the freshness indication label, and can regulate and control the magnetic field intensity generated by the magnetic field generation device based on the freshness of the meat products in the meat storage chamber.
3. The refrigerator according to claim 2, wherein the control means controls the magnetic field generating means to increase the intensity of the magnetic field generated by the magnetic field generating means when the freshness of the meat item in the meat storage compartment is decreased.
4. The refrigerator according to claim 2, wherein the control means controls the magnetic field generating means to stop operating when the control means determines that the meat item in the meat storage compartment has deteriorated based on the color of the freshness indication label.
5. The refrigerator according to claim 2, further comprising an alarm device connected to the control device, wherein the control device controls the alarm device to give an alarm signal when the control device determines that the meat item in the meat storage compartment has deteriorated based on the color of the freshness indication label.
6. The refrigerator of claim 1, wherein the freshness indication label is configured to detect a concentration of biogenic amine in air in the meat storage compartment, and wherein a color of the freshness indication label changes when the concentration of biogenic amine changes.
7. The refrigerator of claim 1, wherein the freshness indicator label comprises a substrate and anthocyanins dispersed in the substrate.
8. The refrigerator of claim 7, wherein the freshness indicating label is prepared by applying an indicating solution to the substrate, the indicating solution comprising anthocyanins, a solvent and an emulsifier.
9. The refrigerator of claim 8, wherein the solvent is soybean oil, the emulsifier is polyglycerol ricinoleate, and the base material comprises at least one of starch and polyvinyl alcohol.
10. The refrigerator is characterized by comprising a meat storage chamber, wherein a freshness indication label is arranged in the meat storage chamber, and the freshness indication label comprises a base material and anthocyanin dispersed in the base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111629601.5A CN114279133A (en) | 2021-12-28 | 2021-12-28 | Refrigerator with a door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111629601.5A CN114279133A (en) | 2021-12-28 | 2021-12-28 | Refrigerator with a door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114279133A true CN114279133A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111629601.5A Pending CN114279133A (en) | 2021-12-28 | 2021-12-28 | Refrigerator with a door |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872218A (en) * | 2018-06-21 | 2018-11-23 | 京东方科技集团股份有限公司 | fresh food freshness monitoring method and device |
| CN110513938A (en) * | 2019-08-14 | 2019-11-29 | 长虹美菱股份有限公司 | A kind of fresh-keeping refrigerator and control method |
| CN110618116A (en) * | 2019-08-28 | 2019-12-27 | 江苏大学 | Preparation method and application of intelligent indication label for visually detecting freshness of meat |
| CN111896694A (en) * | 2020-07-06 | 2020-11-06 | 珠海格力电器股份有限公司 | Food storage equipment and food fresh state judging method, device and medium thereof |
| WO2021002399A1 (en) * | 2019-07-02 | 2021-01-07 | ダイキン工業株式会社 | Electrical field generator and cold storage equipped with same |
| CN213020476U (en) * | 2020-09-16 | 2021-04-20 | 合肥华凌股份有限公司 | Freshness retaining container and refrigeration equipment with same |
-
2021
- 2021-12-28 CN CN202111629601.5A patent/CN114279133A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872218A (en) * | 2018-06-21 | 2018-11-23 | 京东方科技集团股份有限公司 | fresh food freshness monitoring method and device |
| WO2021002399A1 (en) * | 2019-07-02 | 2021-01-07 | ダイキン工業株式会社 | Electrical field generator and cold storage equipped with same |
| CN110513938A (en) * | 2019-08-14 | 2019-11-29 | 长虹美菱股份有限公司 | A kind of fresh-keeping refrigerator and control method |
| CN110618116A (en) * | 2019-08-28 | 2019-12-27 | 江苏大学 | Preparation method and application of intelligent indication label for visually detecting freshness of meat |
| CN111896694A (en) * | 2020-07-06 | 2020-11-06 | 珠海格力电器股份有限公司 | Food storage equipment and food fresh state judging method, device and medium thereof |
| CN213020476U (en) * | 2020-09-16 | 2021-04-20 | 合肥华凌股份有限公司 | Freshness retaining container and refrigeration equipment with same |
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