CN101071015A - Food management type electric refrigerator utilizing RFID - Google Patents

Food management type electric refrigerator utilizing RFID Download PDF

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Publication number
CN101071015A
CN101071015A CNA2006100136581A CN200610013658A CN101071015A CN 101071015 A CN101071015 A CN 101071015A CN A2006100136581 A CNA2006100136581 A CN A2006100136581A CN 200610013658 A CN200610013658 A CN 200610013658A CN 101071015 A CN101071015 A CN 101071015A
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CN
China
Prior art keywords
food
rfid
information
wireless identification
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2006100136581A
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Chinese (zh)
Inventor
吴承镇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taizhou LG Electronics Refrigeration Co Ltd
Original Assignee
Taizhou LG Electronics Refrigeration Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taizhou LG Electronics Refrigeration Co Ltd filed Critical Taizhou LG Electronics Refrigeration Co Ltd
Priority to CNA2006100136581A priority Critical patent/CN101071015A/en
Publication of CN101071015A publication Critical patent/CN101071015A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2500/00—Problems to be solved
    • F25D2500/06—Stock management
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/08—Sensors using Radio Frequency Identification [RFID]

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  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention discloses a wireless identification tags using wireless identification tags (RFID) management of the food refrigerators, including using for the storage of food, installed in the internal storage containers; installed on the side of the storage containers, contain certain information retention period RFID components; to manage equipment from storage containers put food storage containers from the side of RFID components for the preservation of reading information stored with the corresponding food management information control devices in the control device under the control of the input information, as well as the preservation of the period. Accordingly food management information to users show display devices. The invention is effective in management of food, and in a variety of storage containers in the storage size of the food, improving the utilization of the refrigerator.

Description

Utilize the food management type electric refrigerator of wireless identification label (RFID)
Technical field
The invention belongs to a kind of refrigerator, be specifically related to a kind of the storage various foods tank on wireless identification label (RFID) element is installed, the information of utilizing wireless identification label (RFID) to obtain, management is kept at the food management type electric refrigerator that utilizes wireless identification label of the food in the refrigerator effectively.
Background technology
Some refrigerator preserve in order to keep food freshness, independent antistaling box is set, allow the user use as required with being allowed a choice.Because the user can not all remember the product of suffering from indigestion in the refrigerator, so in order to confirm, can only the opening and closing door of refrigerator.When confirming that by said method thing is suffered from indigestion by institute in the refrigerator, owing to open the problem that door of refrigerator causes power consumption at every turn, and cause expired preservation easily, cause food decay, cause the waste of food.
In order to address the above problem, name in Korea S is called in the patent of " refrigerator is preserved the food display control unit " (No. the 0377741st, special permission accession number), proposed to confirm from the outside refrigerator of the preservation food in the refrigerator, the refrigerator of Here it is Fig. 1.
As shown in Figure 1, existing refrigerator comprises: the oscillation circuit 10 that produces certain frequency; The frequency of oscillation of oscillation circuit output is pressed the set specific frequency signal frequency division, produce the frequency loop 11 of fiducial time; The output signal of input frequency loop, the time time set 12 that carries out timing; Based on the time of time time set 12 timing, the date time set 13 of Date Of Change when reaching certain hour; Store the storage device (RAM) 14 of the thing relevant information of suffering from indigestion in the various casees; Be used for the options button portion 15 that the user imports the various product relevant informations of suffering from indigestion such as product kind, quantity and pot-life of suffering from indigestion; Under the control action of central processing unit (CPU) 19, press the preservation food date display part 16 on certain hour interval update displayed time and date; The expired food display part 17 that shows expired food; By the preservation food order display part 18 of certain hour interval update displayed by the product information of suffering from indigestion of storage device 14 storages; Information with the product of being suffered from indigestion that are stored in storage device 14 is as the criterion, and allows show the central processing unit 19 of preserving food time/date, expired food information and current preservation food successively.
Refrigerator with prior art of structure, the user by key input part 15 directly input the product information of suffering from indigestion, be stored in storage device 14 after, demonstration the product time/date of suffering from indigestion, expired food information and current preservation food.
In the prior art, the user suffer from indigestion in order to obtain product information, need the manually title of a plurality of food of input.In addition, in order to import content, options button portion 15 need have and the similar function of computor-keyboard, so the complex structure of its options button portion 15, increases the manufacturing cost of refrigerator.In addition, this keyboard-type input can consume very long input time.
Summary of the invention
The present invention proposes for the problem that solves prior art and exist, and its purpose is in order to provide a kind of administrative institute effectively the suffer from indigestion product and the refrigerator of the utilization rate of raising refrigerator.Technical scheme of the present invention is, a kind of food management type electric refrigerator that utilizes wireless identification label (RFID) comprises being used to the tank depositing food and be installed in refrigerator inside; Be installed in tank a side, comprise certain information retention period RFID components; In order to manage the food deposited by tank, to read the control device of pot-life information, storage food managing information correspondingly from tank side RFID element; The display unit that under the control of control device, the pot-life information of input and food managing information correspondingly, shows to the user.
The present invention is administrative institute's product of suffering from indigestion effectively, and can in a tank, deposit multiple size food, improved the utilization rate of refrigerator.
Description of drawings
Fig. 1 is the refrigerator control display unit block diagram of prior art:
Fig. 2 is food management type electric refrigerator front view and the part enlarged diagram that the present invention utilizes RFID;
Fig. 3 is the food management type electric refrigerator control display unit block diagram that the present invention utilizes RFID;
Fig. 4 is a RFID label decomposing schematic representation;
Fig. 5 is RFID label and tank connection diagram;
Fig. 6 is an embodiment of food managing information.
Wherein:
21RFID reading device 22 input units
Time set 24 storage devices in the time of 23 days
25 display unit, 30 microprocessors
40RFID label 50 tanks
52 fixed parts, 54 connecting portions
The specific embodiment
Below, be elaborated with reference to the food management type electric refrigerator of drawings and Examples to the RFID of utilization of the present invention:
As Fig. 2, shown in 3, food management type electric refrigerator of the present invention comprises and is pasted with the RFID label 40 of storing pot-life information at least, be used to deposit the tank 50 of food, at least obtain the RFID reading device 21 of pot-life information from RFID label 40, the input unit 22 that is used for user's input command, be used to calculate the date with and/or time set 23 during constantly day, storage is used for the storage device 24 of each frame (user interface etc.) of food control service and food managing information etc., the display unit 25 of demonstration food managing information etc., the control inscape, obtain and storage pot-life information from sticking on the RFID label 40 that the product of suffering from indigestion maybe will be pasted in the case, and it is shown to user's microprocessor 30.
Food management type electric refrigerator can also have carries out master microprocessor (not shown) freezing, the refrigeration control action, is connected with order wire between this master microprocessor and the microprocessor 30, communicates.Perhaps, food management type electric refrigerator can carry out the freezing and refrigeration control action by microprocessor 30.In addition, food management type electric refrigerator comprises power supply device (not shown), to each inscape supply power supply.
In more detail, RFID reading device 21 comprises certain electromagnetic wave generating apparatus, sends recoil simulator and receiving device (not shown), so that obtain to stick on the pot-life information that the RFID label 40 of the food that will put into refrigerator or tank 50 has by the user.Here, RFID reading device 21 obtains the identifying information that the pot-life also obtains RFID label 40 information the time.RFID reading device 21 the user the RFID label near in the certain distance time, it is read.
RFID reading device 21 is installed on the door of refrigerator D, is positioned at user's height (as people's chest level position) of close RFID label at an easy rate.Be located at the RFID integrated package in the container in RFID label 40 comprises, this RFID integrated package comprises pot-life information (as 4 days, 6 days, 8 days etc.) and identifying information (being used for the information with other RFID tag recognition).Identifying information can be made of a succession of numeral, as reading, be made of numerals such as " 1 ", " 2 " in the user for convenience.
Below, with reference to Fig. 4 RFID label 40 is described: the pot-life is that suffering from indigestion product of relevant institute can be kept at the valid expiration date in the case, can be with the corresponding time limit of the term of validity that is printed on actual preservation food or with corresponding time limit in time limit of any setting of user.
Input unit 22 is used for user's input command and (for example reads RFID, append or delete food managing information), corresponding to the frame that shows by display unit 25 etc., constitute by the button of suitable number, owing to need not import food name, therefore, as shown in Figure 2, can constitute by 6 LR-button.
Day the time time set 23 RFID reading device 21 read the pot-life information with and/or during identifying information, be used for determining date and constantly at that time; When having the request of microprocessor 30, the date when microprocessor 30 provides the reception request and the moment.
Storage device 24 is stored at least for frame that food managing information shows to the user and the food managing information that is formed by microprocessor 30 are provided, and these frames are meant the interface images that can allow the user easily operate when the user carries out food control.In addition, food managing information comprise at least stick on the product of suffering from indigestion with and/or 40 pot-life of the RFID label information of container, can also comprise identifying information and preserve beginning day, hour or preservation fate etc.Preserve fate and be meant the fate that is stored in the case with the actual thing RFID label 40 of suffering from indigestion.
Display unit 25 is used to show each frame (user interface) and food managing information, is formed on door of refrigerator D front, is positioned at the height that is comparable to RFID reading device 21.Near this display unit 25, be formed with input unit 22, use more convenient.
All freezing, the cold storage procedure of microprocessor 30 controls also provides the food control service.This microprocessor 30 comprises a central processing unit (not shown) at least, can be the device that comprises storage device 24, also can be the device that includes only processors such as central processing unit.In this specification,, microprocessor 30 and storage device 24 are described as independent structures part mutually for more detailed explanation is stored in data in the storage device 24.
Microprocessor 30 is in order to constitute food managing information, the administrative institute product of suffering from indigestion, and shows the frame that is used for the food control service by storage device 24 storages by display unit 25.When microprocessor 30 is selected the food control service the user, receive this order by input unit 22, allow RFID reading device 21 suffer from indigestion from sticking on product with and/or RFID label 40 tank 50 or that will paste, reading pot-life information with and/or identifying information.
Here, the user allow stick on the product of suffering from indigestion with and/or the RFID label 40 of preserving container be positioned at a certain distance from the distance of RFID reading device 21 less than the position.Microprocessor 30 the pot-life information that obtain with and/or identifying information be stored in the storage device 24 as food managing information, microprocessor 30 also can receive pot-life information that whether storing of being sent by the user read with and/or the order of identifying information after, carry out the operation that is stored in storage device 24.
At this moment, when microprocessor 30 allows day time set 23 provide RFID reading device 21 obtain the pot-life information with and/or moment during identifying information or pot-life information with and/or the moment of identifying information when being stored in storage device 24, the moment that time set 23 provides during day (, date with and/or the moment) with pot-life information with and/or identifying information store as food managing information.This moment that provides means preserves beginning day, hour.In addition, each institute's product of suffering from indigestion is all by valid expiration date, this valid expiration date suffer from indigestion by the sticking on RFID label 40 of product be read.
By said process, food management type electric refrigerator obtains the food managing information of the food of preservation soon, is stored in the storage device 24 to manage.In the future, when the user wants to confirm food items (RFID label) that current food management type electric refrigerator preserves, select to be used to confirm the service of the current product of suffering from indigestion by input unit 22.At this moment, the food managing information that microprocessor 30 is read by storage device 24 storages is presented on the display unit 25.
After the microprocessor 30 reading food management information, time set 23 obtains to calculate the food preservation fate when the day before yesterday, hour (date with and/or constantly) information in the time of can be from day, is presented on the display unit 25.This preservation fate calculates by the mode of " when the day before yesterday-preservation beginning day time ".
In addition, microprocessor 30 is in order to allow the user easily confirm the thing of suffering from indigestion, and can be as the criterion when preserving beginning day to show food managing information or with the demonstration food managing information that is as the criterion of remaining valid expiration date.Particularly, for the food managing information that does not comprise the term of validity, microprocessor 30 can be as the criterion during day with the preservation beginning and show.
Microprocessor 30 utilizes the preservation of the term of validity of storage and calculating during day, when the user selects or automatically provide residue valid expiration date to report service.This reports service is to calculate current residual valid expiration date by microprocessor 30, in the time of in certain time limit, show warning informations (by the expression of literal, by the expression of icon, the alarm tone by loudspeaker etc.), allow the user examine to know by display unit 25.Such as, in the time of can having only 3 days in remaining valid expiration date, microprocessor 30 begins to show warning information.In addition, the warning information of demonstration can show with different warning informations along with the minimizing of valid expiration date, causes user's attention more with this.Warning information is stored in the storage device 24, and microprocessor 30 also can show the expired product warning information of suffering from indigestion by display unit 25.
As mentioned above, suffer from indigestion by sticking on RFID label 40 information of product or tank 50 of user obtain the relevant food control service of preserving.In the future, when the user removes the preservation state of the product of suffering from indigestion, need delete the information of the corresponding product of suffering from indigestion from food managing information.
At this moment, microprocessor 30 shows the food managing information of the thing of suffering from indigestion of current preservation by display unit 25, receive the product of suffering from indigestion that will delete that users select by input unit 22, this institute of deletion relevant information (pot-life information, identifying information, preservation begin day, preservation fate and warning information services selection and whether wait) of product of suffering from indigestion from storage device 23.Perhaps, under user's operation, microprocessor 30 allows the user pass through input unit 22 input preservation states and removes order after reading RFID label 40 information that the food that will remove preservation state pastes (pot-life information with and/or identifying information) by RFID reading device 21.
Afterwards, microprocessor 30 receives preservation state and removes order, and deletion contains the food managing information with the corresponding information of RFID label 40 information.Deletion lags behind, and microprocessor 30 shows the food managing information of the thing of suffering from indigestion of current residual again by display unit 25.
As shown in Figure 4; RFID label 40 by receive radio waves from RFID reading device 21, transmit contain pot-life information with and/or the antenna part 41 of the radio wave of identifying information; when receiving radio wave, utilize this radio wave energy, the pot-life information of having stored with and/or the identifying information RFID integrated circuit 42 that is included in the radio wave, transmits, cover also the last hypodermal layer 43a of portion, the 43b formation of protection antenna part 41 and RFID integrated circuit 42.Here, the 43a of hypodermal layer portion be owing to will stick on the tank outer surface that is used for stored food, therefore is formed with sticking structure (such as bonding agent etc.) at least.
RFID label 40 also comprises the recognition structure that can allow the user confirm by naked eyes, and this recognition structure can be color or numeral (numeral relevant with pot-life information) such as being formed on the 43a of epithelial layer portion.These recognition structures are relevant with the identifying information of RFID integrated circuit 42 storages, are used for distinguishing with other RFID label.When being color such as recognition structure, if the term of validity be two days be decided to be redness, 4 days be decided to be green, 6 days be decided to be yellow, then the user is by observing color cognitive valid expiration date at an easy rate.In addition, the storage device 24 of food management type electric refrigerator is also by these identifying informations, and storage is used to read the database of recognition structure, and microprocessor 30 utilizes identifying information, shows the recognition structure corresponding with identifying information by display unit 25 to the user.
Here, preserve the food that food such as oil product etc., its quality or taste and pot-life are closely related, or the free food of user, these food are applicable to the food control service.
As shown in Figure 5, being used to store suffer from indigestion hollow shape tank 50 outer surfaces of thing A as institutes such as milk boxes, be pasted with RFID label 40, this RFID label 40 can be opened, and is used on other tanks.
Particularly, tank 50 has the open structure of end face, can put into suffering from indigestion product from the top, constitutes by encircling the tabular fixed part 52 more than two of preserving the food periphery and the connecting portion with certain retractility 54 that is connected between each fixed part 52.
Can manage the rotten product A that suffer from indigestion of short, the easy generation of the term of validity such as oil product most effectively, as representational structure, be used to store the tank 50 of milk box, be formed with four fixed parts 52 on its four faces, be that the position, bight is provided with connecting portion 54 between each fixed part 52.
Fixed part 52 is formed by plastic material usually, and connecting portion 54 forms by having certain flexible rubber, is advisable with the structure injection molded that connecting portion 54 is embedded between each fixed part 52.In addition,, other fixed structure can be set, so that inlay ground fixedly connected 54 at the two ends of fixed part 52.
In tank 50, RFID label 40 sticks in each fixed part 52 certain and simultaneously goes up, is exposed at the outside, can allow the user easily close to RFID reading device 21 the RFID that sticks on tank 50.
Because tank 50 can be regulated the size on its width, therefore can deposit the food A of multiple size, shape.
Can by allow the tank 50 of depositing the product A that suffers from indigestion to some extent be positioned at a certain distance from RFID reading device 21 less than the position, receive pot-life information from RFID label 40, perhaps only tank be positioned at a certain distance from RFID reading device 21 less than the position, after RFID label 40 receives the pot-life information, food A is housed in the tank 50.
Afterwards, the tank 50 of store food A is kept in the refrigerator, is as the criterion with the pot-life information of reading from RFID label 40, management is preserved beginning day, is preserved fate, valid expiration date etc.
As shown in Figure 6, the food managing information that shows of display unit 25 comprise RFID label 40 storages of the product of suffering from indigestion by sticking on pot-life information, identifying information (or recognition structure), preserve and begin day, the term of validity.Here, for the preservation food that needs provide warning information to serve, demonstration that can be other, for example, microprocessor 30 as items " 1 ", " 2 ", has also shown expired fate for the expired product of suffering from indigestion.
The invention effect: as mentioned above, the food management type electric refrigerator that utilizes RFID of the present invention, Its tank that is pasted with the RFID label can increase by width, simultaneously can since Be as the criterion, food is managed from the pot-life of RFID label information, deposit at suffering from indigestion product Be placed under the state of tank, automatically according to pot-life information management food, even make The user is the directly title of the input product of suffering from indigestion, also administrative institute's product of suffering from indigestion easily, owing to showing Show fate and valid expiration date etc., the administrative institute's product of suffering from indigestion effectively preserved, owing to can be one Deposit in the individual tank multiple size food, can improve the utilization rate of refrigerator.

Claims (5)

1, a kind of food management type electric refrigerator that utilizes wireless identification label (RFID) is characterized in that: comprise being used to the tank depositing food and be installed in refrigerator inside; Be installed in tank a side, comprise wireless identification label (RFID) element of certain information retention period; In order to manage the food deposited by tank, to read the control device of pot-life information, storage food managing information correspondingly from tank side wireless identification label (RFID) element; The display unit that under the control of control device, the pot-life information of input and food managing information correspondingly, shows to the user.
2, the food management type electric refrigerator that utilizes wireless identification label (RFID) according to claim 1, it is characterized in that: tank has the hollow structure that width can change.
3, the food management type electric refrigerator that utilizes wireless identification label (RFID) according to claim 2, it is characterized in that: tank comprises each fixed part of tabular that is spaced around want store food by certain, and be connected between each fixed part, can be by the flexible connecting portion of width.
4, the food management type electric refrigerator that utilizes wireless identification label (RFID) according to claim 3 is characterized in that: wireless identification label (RFID) element is installed in certain the one side outside in each fixed part.
5, a kind of refrigerator is preserved with wireless identification label (RFID) special container, it is characterized in that: comprise and storing certain information retention period, utilize this electric wave to send wireless identification label (RFID) element of the radio wave that contains pot-life information after receiving radio wave;
When wireless identification label (RFID) element was being pasted in a side, size can change, can put the tank of numerous food by width.
CNA2006100136581A 2006-05-12 2006-05-12 Food management type electric refrigerator utilizing RFID Pending CN101071015A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2302312A1 (en) 2009-09-24 2011-03-30 BSH Electrodomésticos España, S.A. Assembly and method for monitoring at least one household appliance
EP2306129A1 (en) 2009-09-24 2011-04-06 BSH Electrodomésticos España, S.A. Refrigerator and method for operating a refrigerator
CN102016884A (en) * 2008-02-26 2011-04-13 艾利丹尼森公司 RFID tag for direct and indirect food contact
CN101498539B (en) * 2008-01-30 2011-11-16 技嘉科技股份有限公司 Energy-saving electric refrigerator and its energy-saving method
CN102645083A (en) * 2012-05-24 2012-08-22 南京大学 Intelligent refrigerator based on radio frequency recognition technology and working method thereof
CN103148666A (en) * 2013-04-03 2013-06-12 合肥美的荣事达电冰箱有限公司 Refrigerator
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CN101498539B (en) * 2008-01-30 2011-11-16 技嘉科技股份有限公司 Energy-saving electric refrigerator and its energy-saving method
CN102016884A (en) * 2008-02-26 2011-04-13 艾利丹尼森公司 RFID tag for direct and indirect food contact
EP2302312A1 (en) 2009-09-24 2011-03-30 BSH Electrodomésticos España, S.A. Assembly and method for monitoring at least one household appliance
EP2306129A1 (en) 2009-09-24 2011-04-06 BSH Electrodomésticos España, S.A. Refrigerator and method for operating a refrigerator
CN102645083A (en) * 2012-05-24 2012-08-22 南京大学 Intelligent refrigerator based on radio frequency recognition technology and working method thereof
CN103148666A (en) * 2013-04-03 2013-06-12 合肥美的荣事达电冰箱有限公司 Refrigerator
CN104125261A (en) * 2013-04-28 2014-10-29 海尔集团公司 Wine cabinet stored wine information processing method and system and cloud-side server
CN103791687A (en) * 2014-02-25 2014-05-14 四川长虹电器股份有限公司 Food management method and refrigerator
CN103791687B (en) * 2014-02-25 2016-01-13 四川长虹电器股份有限公司 A kind of food management method and refrigerator
CN103940192A (en) * 2014-04-24 2014-07-23 合肥美菱股份有限公司 Refrigerator food health management system
CN105093967A (en) * 2014-04-30 2015-11-25 青岛海尔股份有限公司 Yogurt consumption management method and yogurt refrigerator
CN105093967B (en) * 2014-04-30 2018-10-12 青岛海尔股份有限公司 The edible management method and Yoghourt refrigerator of Yoghourt
CN104197633B (en) * 2014-09-22 2016-10-05 合肥华凌股份有限公司 Food fresh keeping management refrigerator and the fresh-keeping management method of refrigerator food
CN104197633A (en) * 2014-09-22 2014-12-10 合肥华凌股份有限公司 Food preservation management refrigerator and food preservation management method
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CN104880011B (en) * 2015-06-08 2018-05-11 合肥华凌股份有限公司 For refrigeration plant timing prompter and there is its refrigerator
CN104949460B (en) * 2015-06-24 2017-07-11 广西大学 A kind of refrigerator of subsidiary expired prompting
CN104949460A (en) * 2015-06-24 2015-09-30 广西大学 Refrigerator with expired alarm function
CN105202860A (en) * 2015-10-28 2015-12-30 合肥美菱股份有限公司 Intelligent refrigerator system
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CN105444518B (en) * 2015-12-30 2019-01-04 合肥美的智能科技有限公司 Food management system, method and the refrigerator of refrigerator
WO2020211771A1 (en) * 2019-04-15 2020-10-22 胜斗士(上海)科技技术发展有限公司 Management system for restaurant cold store
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CN111860718B (en) * 2020-07-17 2022-07-22 海信视像科技股份有限公司 Refrigerator and food material management method
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