CN113940526A - Automatic air curtain cabinet that opens door based on face feature recognition - Google Patents
Automatic air curtain cabinet that opens door based on face feature recognition Download PDFInfo
- Publication number
- CN113940526A CN113940526A CN202110952201.1A CN202110952201A CN113940526A CN 113940526 A CN113940526 A CN 113940526A CN 202110952201 A CN202110952201 A CN 202110952201A CN 113940526 A CN113940526 A CN 113940526A
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- Prior art keywords
- door
- transmission worm
- air curtain
- cabinet
- servo motor
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- 230000005540 biological transmission Effects 0.000 claims abstract description 73
- 230000000007 visual effect Effects 0.000 claims abstract description 19
- 230000001815 facial effect Effects 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- A47F3/00—Show cases or show cabinets
- A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
- A47F3/0404—Cases or cabinets of the closed type
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- A47F3/00—Show cases or show cabinets
- A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
- A47F3/0404—Cases or cabinets of the closed type
- A47F3/0426—Details
- A47F3/043—Doors, covers
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/73—Power-operated mechanisms for wings with automatic actuation responsive to movement or presence of persons or objects
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/79—Power-operated mechanisms for wings with automatic actuation using time control
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F17/00—Special devices for shifting a plurality of wings operated simultaneously
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/20—Application of doors, windows, wings or fittings thereof for furniture, e.g. cabinets
- E05Y2900/204—Application of doors, windows, wings or fittings thereof for furniture, e.g. cabinets for display counters, e.g. for refrigerated counters
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The invention discloses an air curtain cabinet capable of automatically opening a door based on human face feature recognition, which comprises a cabinet body, a cabinet door and a lamp box frame arranged at the top of the cabinet body, wherein the cabinet door comprises a plurality of segmented door plates which are sequentially arranged, the upper end and the lower end of each segmented door plate are respectively hinged with the cabinet body through a door shaft, and a visual recognition automatic door opening structure is arranged in the lamp box frame; the visual identification automatic door opening structure comprises a controller, a servo motor, a plurality of transmission worm gears, a first transmission worm and a second transmission worm which are transversely arranged, wherein power input ends of the first transmission worm and the second transmission worm are oppositely arranged; a plurality of transmission worm wheels are sequentially arranged, one transmission worm wheel corresponds to one segmented door plate, each transmission worm wheel is in transmission connection with a door shaft at the upper end of the segmented door plate through a gear set, and each transmission worm wheel is in meshing connection with a position corresponding to a transmission worm; a visual camera is arranged above the door frame. The invention realizes all-weather energy saving through the automatic door opening structure, and the energy consumption is reduced by 60 percent.
Description
Technical Field
The invention relates to the technical field of energy conservation of air curtain cabinets, in particular to an air curtain cabinet capable of automatically opening a door based on human face feature recognition.
Background
Air curtain cabinet product generally is used for convenience store and merchant to surpass, be used for the show to sell cold-stored goods, mainly include the beverage, drinks, milk product, bean products, vacuum packaging's meat and food, delicately, fruit and vegetable etc. for giving the better commodity show of customer, the air curtain cabinet product on the existing market is open-ended, just accessible manual work pulls down the night curtain when nobody shops at night, realize reducing power consumption, then owing to the possibility that has customer's shopping daytime, the night curtain then can't use. Therefore, the air curtain cabinet has large heat exchange with the external environment, and the air curtain cabinet consumes a large amount of electric energy for ensuring that the refrigerating temperature in the cabinet reaches the standard, and the loss of cold air can also cause the quality protection problem of commodities or food.
Due to the reasons, the invention design of the air curtain cabinet with the automatic door opening function is promoted, and the transparent acrylic door is added at the opening of the air curtain cabinet and the visual identification automatic door opening electric control system is arranged, so that the door body of the air curtain cabinet is automatically opened when someone shops, and the energy is saved by 60% under the condition that the display effect of the air curtain cabinet is not sacrificed; meanwhile, the top of the lamp box is designed to be 300mm high, and the visual identification automatic door opening electric control system is installed in the lamp box frame, so that the work of decoration and capping of an installer is omitted, and the lamp box can provide a ready-made medium for advertisement display and propaganda of customers.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the air curtain cabinet capable of automatically opening the door based on the face feature recognition, so that all-weather energy conservation of the air curtain cabinet is realized under the condition of not influencing the shopping experience of customers, the operation cost of the air curtain cabinet is reduced, the design is reasonable, the defects in the prior art are overcome, and the air curtain cabinet has a good effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
an energy-saving air curtain cabinet with a face characteristic visual identification automatic door opening function comprises a cabinet body, a cabinet door and a lamp box frame arranged at the top of the cabinet body, wherein the cabinet door comprises a plurality of sequentially arranged segmented door plates, the upper end and the lower end of each segmented door plate are respectively hinged with the cabinet body through a door shaft, and a visual identification automatic door opening structure is arranged in the lamp box frame;
the visual identification automatic door opening structure comprises a controller, a servo motor, a plurality of transmission worm gears, a first transmission worm and a second transmission worm which are transversely arranged, wherein power input ends of the first transmission worm and the second transmission worm are oppositely arranged; a plurality of transmission worm wheels are sequentially arranged, one transmission worm wheel corresponds to one segmented door plate, each transmission worm wheel is in transmission connection with a door shaft at the upper end of the segmented door plate through a gear set, and each transmission worm wheel is in meshing connection with a position corresponding to a transmission worm; a visual camera is arranged above the door frame and is used for capturing images in front of the cabinet body.
Furthermore, a driving bevel gear is fixedly connected to an output shaft of the servo motor, driven bevel gears are arranged at power input ends of the first transmission worm and the second transmission worm, and the driving bevel gear is in meshed connection with the two driven bevel gears.
Further, the gear train includes driving gear and driven gear, and the driving gear sets up with the transmission worm wheel is coaxial, and driven gear sets up with the door-hinge is coaxial, and driving gear and driven gear meshing are connected.
Further, the lamp box frame includes dull and stereotyped lamp house, and dull and stereotyped lamp house is fixed with both sides end plate through magnetism, and dull and stereotyped lamp house embeds the light guide plate.
Furthermore, an electric control box is arranged in the lamp box frame, the controller is arranged in the electric control box, and the controller is electrically connected with the vision camera and the servo motor respectively.
Further, the sectional door panel is an inward opening type transparent acrylic door.
Further, when the time for the vision camera to continuously recognize the facial features exceeds 3 seconds, the controller sends a forward rotation signal to the servo motor, the servo motor rotates forwards, the bevel gear drives the first transmission worm and the second transmission worm to rotate, and the first transmission worm and the second transmission worm drive the transmission worm gear to rotate, so that the door spindle is driven to rotate, and the multiple segmented door panels are opened; when the vision camera does not detect the facial features within 5 seconds continuously, the controller sends a reverse signal to the servo motor at the moment, and the servo motor reverses to close the segmented door plates.
The invention has the following beneficial effects:
the invention can realize all-weather energy saving through the automatic door opening structure, and the energy consumption is reduced by 60 percent; the installed transparent acrylic glass door realizes energy conservation and does not influence the display effect of the air curtain cabinet; the display lamp box frame is designed at the top, and the visual identification automatic door opening electric control system is installed in the lamp box frame, so that the internal space of the original cabinet body is not occupied; the lamp box also saves the work of installing, decorating and capping, and simultaneously, the lamp box can provide ready media for advertisement display and propaganda of customers.
Drawings
Fig. 1 is a schematic overall structure diagram of an air curtain cabinet according to an embodiment of the present invention;
FIG. 2 is a schematic view of an overall structure of an air curtain cabinet with a light box frame removed according to an embodiment of the present invention;
FIG. 3 is a schematic view of a visual identification automatic door opening structure according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
wherein, 1-cabinet body; 2-lamp box frame; 3-a first door panel; 4-a second door panel; 5-a third door panel; 6-a fourth door panel; 7-a fifth door panel; 8-door shaft; 9-a visual camera; 10-a servo motor; 11-a first drive worm; 12-a second drive worm; 13-a drive worm gear; 14-drive bevel gear; 15-driven bevel gear; 16-a drive gear; 17-a driven gear; 18-electric control box
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1-4, an energy-saving air curtain cabinet with a visual recognition automatic door opening function for human face features comprises a cabinet body 1, a cabinet door and a lamp box frame 2 arranged at the top of the cabinet body, wherein the cabinet door comprises a first door plate 3, a second door plate 4, a third door plate 5, a fourth door plate 6 and a fifth door plate 7 which are sequentially arranged, the upper end and the lower end of each sectional door plate are respectively hinged with the cabinet body 1 through a door shaft 8, and a visual recognition automatic door opening structure is arranged in the lamp box frame 2;
specifically, the visual identification automatic door opening structure comprises a controller, a servo motor 10, five transmission worm wheels 13, a first transmission worm 11 and a second transmission worm 12 which are transversely arranged, wherein power input ends of the first transmission worm 11 and the second transmission worm 12 are oppositely arranged. A driving bevel gear 14 is fixedly connected to an output shaft of the servo motor 10, driven bevel gears 15 are respectively arranged at power input ends of the first transmission worm 11 and the second transmission worm 12, the driving bevel gear 14 is meshed with the two driven bevel gears 15, and the driving bevel gears are driven by the servo motor 10 to drive the transmission worms to rotate; the five transmission worm gears 13 are sequentially arranged, one transmission worm gear 13 corresponds to one sectional door plate, each transmission worm gear 13 is in transmission connection with a door shaft at the upper end of the sectional door plate through a gear set, the gear set comprises a driving gear 16 and a driven gear 17, the driving gear 16 and the transmission worm gear 13 are coaxially arranged, the driven gear 17 and the door shaft 8 are coaxially arranged, and the driving gear 16 and the driven gear 17 are in meshed connection; the corresponding positions of the transmission worm wheels 13 and the transmission worm are meshed and connected, and a vision camera 9 is arranged above the door frame and used for capturing images in front of the cabinet body.
Specifically, when the time for the vision camera 9 to continuously recognize facial features exceeds 3 seconds, the controller sends a forward rotation signal to the servo motor 10, the servo motor 10 rotates forward, the first transmission worm 11 and the second transmission worm 12 are driven to rotate through the drive bevel gear 14, the first transmission worm 11 and the second transmission worm 12 drive the transmission worm wheel 13 to rotate, so that the door spindle 8 is driven to rotate, and the multiple segmented door panels are opened; when the vision camera 9 does not detect the facial features within 5 seconds continuously, the controller sends a reverse signal to the servo motor 10 at the moment, and the servo motor 10 reverses, so that the plurality of sectional door panels are closed.
Specifically, lamp box frame 2 includes dull and stereotyped lamp house, is equipped with the LOGO sign on the dull and stereotyped lamp house, for "AUCMA" word, and dull and stereotyped lamp house is fixed with both sides end plate through magnetism, the built-in light guide plate of dull and stereotyped lamp house.
Specifically, an electronic control box 18 is arranged in the lamp box frame 2, a controller is arranged in the electronic control box 18, and the controller is electrically connected with the vision camera 9 and the servo motor 10 respectively.
Specifically, the five sectional door panels are all inward-opening transparent acrylic doors, the first transmission worm 11 controls the first door panel 3, the second door panel 4, the third door panel 5 and the fourth door panel 6 to rotate, the second transmission worm 12 controls the fifth door panel 7 to rotate, and the fourth door panel 6 and the fifth door panel 7 are split doors because the rotation directions of the first transmission worm 11 and the second transmission worm 12 are opposite.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. The air curtain cabinet capable of automatically opening the door based on the face feature recognition is characterized by comprising a cabinet body, a cabinet door and a lamp box frame arranged at the top of the cabinet body, wherein the cabinet door comprises a plurality of segmented door plates which are sequentially arranged, the upper end and the lower end of each segmented door plate are respectively hinged with the cabinet body through a door shaft, and a visual recognition automatic door opening structure is arranged in the lamp box frame;
the visual identification automatic door opening structure comprises a controller, a servo motor, a plurality of transmission worm wheels, a first transmission worm and a second transmission worm which are transversely arranged, wherein power input ends of the first transmission worm and the second transmission worm are oppositely arranged; a plurality of transmission worm wheels are sequentially arranged, one transmission worm wheel corresponds to one segmented door plate, each transmission worm wheel is in transmission connection with a door shaft at the upper end of the segmented door plate through a gear set, and each transmission worm wheel is in meshing connection with a position corresponding to a transmission worm; a visual camera is arranged above the door frame and is used for capturing images in front of the cabinet body.
2. The air curtain cabinet capable of automatically opening the door based on the human face feature recognition is characterized in that when the time for the visual camera to continuously recognize the facial features exceeds 3 seconds, the controller sends a forward rotation signal to the servo motor, the servo motor rotates forward to drive the first transmission worm and the second transmission worm to rotate, and the first transmission worm and the second transmission worm drive the transmission worm wheel to rotate so as to drive the door shaft to rotate and open the multiple segmented door panels; when the vision camera does not detect the facial features within 5 seconds continuously, the controller sends a reverse signal to the servo motor at the moment, and the servo motor reverses to close the segmented door plates.
3. The air curtain cabinet capable of automatically opening door based on human face feature recognition as claimed in claim 1, wherein a driving bevel gear is fixedly connected to an output shaft of the servo motor, driven bevel gears are respectively arranged at power input ends of the first transmission worm and the second transmission worm, and the driving bevel gear is meshed with the two driven bevel gears.
4. The air curtain cabinet capable of automatically opening the door based on the human face feature recognition is characterized in that the gear set comprises a driving gear and a driven gear, the driving gear is coaxially arranged with the transmission worm gear, the driven gear is coaxially arranged with the door shaft, and the driving gear is meshed with the driven gear.
5. The air curtain cabinet capable of automatically opening the door based on the face feature recognition as claimed in claim 1, wherein the light box frame comprises a flat light box, the flat light box is fixed with the two side end plates through magnetic attraction, and the flat light box is internally provided with a light guide plate.
6. The air curtain cabinet capable of automatically opening the door based on the human face feature recognition is characterized in that an electric control box is arranged in the lamp box frame, the controller is arranged in the electric control box, and the controller is electrically connected with the vision camera and the servo motor respectively.
7. The air curtain cabinet capable of being opened automatically based on human face feature recognition is characterized in that the sectional door panel is an inward opening type transparent acrylic door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110952201.1A CN113940526A (en) | 2021-08-19 | 2021-08-19 | Automatic air curtain cabinet that opens door based on face feature recognition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110952201.1A CN113940526A (en) | 2021-08-19 | 2021-08-19 | Automatic air curtain cabinet that opens door based on face feature recognition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113940526A true CN113940526A (en) | 2022-01-18 |
Family
ID=79327757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110952201.1A Pending CN113940526A (en) | 2021-08-19 | 2021-08-19 | Automatic air curtain cabinet that opens door based on face feature recognition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113940526A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2856877Y (en) * | 2004-08-03 | 2007-01-10 | 潘进 | Air curtain freezer with automatic open/close door leaf |
| JP2013169320A (en) * | 2012-02-21 | 2013-09-02 | Takakura:Kk | Cover device for showcase |
| CN209807543U (en) * | 2018-12-07 | 2019-12-20 | 成都金臣仕家具有限公司 | Wardrobe with foldable cabinet door |
| CN210832678U (en) * | 2019-11-13 | 2020-06-23 | 青岛大上电器有限公司 | Refrigerator with door capable of being automatically opened and closed |
| CN111765707A (en) * | 2020-07-10 | 2020-10-13 | 马鞍山学院 | Automatic double-door refrigerator and double-door device thereof |
| CN112056874A (en) * | 2020-10-17 | 2020-12-11 | 广东海容冷链科技有限公司 | Refrigerated cabinet with non-contact door opening function |
| CN215776903U (en) * | 2021-08-19 | 2022-02-11 | 青岛澳柯玛冷链集成有限公司 | Automatic air curtain cabinet that opens door based on face feature recognition |
-
2021
- 2021-08-19 CN CN202110952201.1A patent/CN113940526A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2856877Y (en) * | 2004-08-03 | 2007-01-10 | 潘进 | Air curtain freezer with automatic open/close door leaf |
| JP2013169320A (en) * | 2012-02-21 | 2013-09-02 | Takakura:Kk | Cover device for showcase |
| CN209807543U (en) * | 2018-12-07 | 2019-12-20 | 成都金臣仕家具有限公司 | Wardrobe with foldable cabinet door |
| CN210832678U (en) * | 2019-11-13 | 2020-06-23 | 青岛大上电器有限公司 | Refrigerator with door capable of being automatically opened and closed |
| CN111765707A (en) * | 2020-07-10 | 2020-10-13 | 马鞍山学院 | Automatic double-door refrigerator and double-door device thereof |
| CN112056874A (en) * | 2020-10-17 | 2020-12-11 | 广东海容冷链科技有限公司 | Refrigerated cabinet with non-contact door opening function |
| CN215776903U (en) * | 2021-08-19 | 2022-02-11 | 青岛澳柯玛冷链集成有限公司 | Automatic air curtain cabinet that opens door based on face feature recognition |
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