JP2002156181A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the rate of a foodstuff in a refrigerator, which is wasted without being utilized due to the expire of a sell-by date, and permit the confirmation of commodities in the refrigerator without opening the same. SOLUTION: The refrigerator comprises a reader writer 2 for writing information into a non-contact type memory medium 20 and read out the information from the non-contact type memory medium 20, an information retaining means 22 for storing the information read out by the reader writer and an information indicating means 2 for indicating the information stored in the information retaining means 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a refrigerator.
More particularly, the present invention relates to a refrigerator provided with a product display device in a refrigerator using a non-contact type storage medium such as a non-contact type label tag IC.

[0002]

2. Description of the Related Art At present, electric refrigerators equipped with a recording device and a reproducing device are on the market. When the user notices, the regenerator of the electric refrigerator blows a message such as, for example, "Drink the milk by its expiration date, so let's drink it today". It is used as a memorandum for drinking.

Conventionally, the ratio of commodities such as foods discarded without being used due to expiration of the expiration date in a refrigerator is high. In particular, when a large amount of food is stored, the user often does not sufficiently recognize the type, amount, expiration date, and the like of the stored food. For this reason, it is necessary to check the refrigerator when going shopping, determine the menu of the day according to the type of food stored, and take measures such as purchasing missing food, but this is not enough. Not enforced. In particular, a user who goes shopping from a workplace directly to a retail store such as a supermarket or a specialty store in a home where two people work together cannot often check the contents of the refrigerator before shopping. For this reason, the same product that is still in stock in the refrigerator may be purchased more than once, or the food may be discarded because the expiration date is forgotten and cannot be consumed before the expiration date. .

[0004] Further, when the refrigerator door is opened to check the inventory of commodities in the refrigerator, the temperature in the refrigerator rises, which causes a decrease in the storage capacity of the refrigerator and an increase in electricity consumption. In order to avoid such a problem, there is a need for a means for checking products such as foods stored in a refrigerator without opening a door.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to reduce the ratio of commodities such as foods that are discarded without being used due to expiration of the expiration date in a refrigerator. With the goal. Another object of the present invention is to make it possible to check products in a refrigerator without opening the refrigerator.

[0006]

According to the present invention, there is provided a reader / writer for writing information to a non-contact type storage medium and reading information from the non-contact type storage medium.
There is provided a refrigerator comprising: an information holding unit for storing information read by the reader / writer; and an information display unit for displaying information stored in the information holding unit. It is preferable that the refrigerator according to the present invention further includes an input operation means for inputting information manually or by voice. It is preferable that the refrigerator further includes a refrigerator according to the present invention, a camera for photographing the inside of the refrigerator, and image display means for displaying an image of the inside of the refrigerator photographed by the camera. The refrigerator according to the present invention is preferably characterized in that the information display means and the image display means are the same display means. The refrigerator according to the present invention is preferably characterized in that when the expiration date falls within a predetermined number of days before, the expiration date is displayed on the display means. In the refrigerator according to the present invention, the information holding unit holds a recipe of the dish, and based on the information held by the information holding unit, a product lacking in the recipe of the dish can be displayed on the information display unit. Preferably, it is a feature.

[0007] The refrigerator according to the present invention preferably further includes communication means for downloading or uploading various kinds of information that may include a recipe for cooking via an electric communication line. The information, the image in the refrigerator taken by the camera, a cooking recipe, and one or more pieces of information selected from a group consisting of a product lacking in the cooking recipe, the refrigerator via the telecommunication line. It is preferable that the information is displayed by the communication means on the display means of the connected user terminal.

[0008] In the refrigerator according to the present invention, the information includes a product identification code, a product name, a manufacturer's desired retail price,
Sales price, date of manufacture, expiration date, date of purchase, date of opening, predetermined number of days to notify the expiration date, information on the ingredients used in the product,
It is preferable to include information of one or more items selected from information items of a group consisting of a manufacturer name, a manufacturing factory name, a product remaining rate, and presence or absence in the refrigerator.
Also, the information includes the product name and the selling price, and the information is used and recorded in the information holding means, and the lowest selling price in the past and / or the past selling price change for each product. Is preferably displayed on the information display means.

In the present invention, the non-contact type storage medium is
A medium that includes an IC chip or the like as an information storage medium and updates information in a contactless manner by an external information reading and writing device (reader / writer). As long as information can be transmitted and received in a non-contact manner, the wavelength of a radio wave or light does not matter, and the length of a communication distance does not matter. The non-contact storage medium of the present invention obtains operating power by electromagnetic induction by radio waves received from a reader / writer used to read information from the non-contact storage medium, and communicates with the reader / writer using radio waves. Includes those that exchange data. That is,
The non-contact type storage medium of the present invention also includes a storage medium having an antenna coil built therein, which is called an on-chip coil method because of a demand for downsizing and multifunctional components. Further, the non-contact type storage medium of the present invention also includes a non-contact type storage medium including an antenna (for example, an antenna coil) for transmitting and receiving radio waves as a separate member. The non-contact type storage medium of the present invention also includes an IC chip also called a non-contact type label tag IC (integrated circuit). In addition, when the product is not a product such as food purchased from a specific store, there is a case where a non-contact type storage medium is not attached.For such a product, a user operates an operation unit provided in a refrigerator. Necessary items may be input to the database held by the information holding means. In this case, the user may attach a non-contact type storage medium to such a product and input information from a reader / writer, and the database may be managed using the non-contact type storage medium. The user may input necessary items to the database each time the product is used.

[0010] The reader / writer is an information reading and writing device. It is a device that reads and writes information such as product information recorded on a non-contact storage medium. This reader / writer can be installed outside the refrigerator, or it can be installed inside the refrigerator to automatically detect food that enters or leaves the refrigerator by constantly monitoring the label tag IC in the refrigerator. You can also do so. In the present invention, the information holding means refers to information such as product information stored in a non-contact type storage medium read by a reader / writer, or information such as product information manually or voice input by a user through an operation means. RA to save
This is a computer-readable recording medium including an M, a flash memory, a hard disk, and the like. The display means is a liquid crystal display device for displaying information such as product information or displaying an image in the refrigerator.

Here, the refrigerator is a box that keeps the inside at a low temperature and that can cool and store foods and the like,
This is a general term for rooms. In the present invention, the refrigerator also includes a freezer for freezing and storing food. The refrigerator of the present invention widely includes a home refrigerator, a commercial large refrigerator, and a refrigerator. The input operation means in the present invention is a keyboard or a number for inputting numbers and characters for inputting information such as product information stored in the information holding means, and a number and characters such as a microphone for voice input. And means for operating the refrigerator by inputting a password. The operation means may display a command key on a liquid crystal or the like of the display means to allow the user to input.

The telecommunications line broadly includes a mobile telephone, a radio line network such as PHS, a telephone line network, a digital line network, an analog line network, and the Internet connected by a TCP / IP protocol. A user terminal is a computer, a mobile phone, a PHS, or a personal digital assistant (PDA).
is a terminal that transmits and receives information and images to and from a refrigerator computer via a telecommunication line. The display unit of the user terminal refers to a unit that displays information or an image formed by a liquid crystal or a cathode ray tube of the user terminal. Communication means means means for transmitting and receiving information and images via a telecommunication line with a user terminal in the refrigerator,
Including communication modems.

The product identification code is information for identifying a product, including characters and symbols such as numbers and alphabets. The expiration date is the date on which the manufacturer guarantees the quality characteristics of the product if consumed by eating or the like before the expiration date. For products such as foods whose expiration date after opening is shorter than before opening, processing such as changing the expiration date in the database after a preset period has elapsed after entering the usage amount in the database. May go.

The predetermined number of days for notifying the expiration date is a number of days for setting how many days before the expiration date the user is notified by display means such as a refrigerator or a user terminal. The number of days can be set differently for each product such as food. For example, foods with a relatively short shelf life, such as fresh foods and milk, are displayed one or two days before the shelf life, and foods with a relatively long shelf life, such as soy sauce and miso, are displayed 10 days before the shelf life. Or 3
It may be displayed from day 0.

The information relating to the used raw materials includes not only the raw material names but also the characteristics of the raw materials in the product, such as the country of origin, the place of origin, and the names of additives such as synthetic colorants used. Can widely include information on raw materials. The manufacturer name is the name of the manufacturer that manufactured the product.
It includes manufacturers of final processing and manufacturers of various raw materials. The manufacturing factory name is the name of the factory of the manufacturer that manufactured the product, and includes a manufacturer of final processing, a manufacturer of various raw materials, and the like. The product remaining amount ratio is a ratio of the remaining amount after the user has consumed the product to the purchased amount.
The display of the remaining amount ratio is not limited to a numerical value representing a percentage or the like, or a display of a visually recognizable bar graph or pie graph.

In the present invention, the camera is used as a means for taking an image of the state of product stock in the refrigerator so that the user can check the inside of the refrigerator without opening and closing the door of the refrigerator. The camera is a CCD (Charg) that can store images electronically as digital data.
e Coupled Device) or CMOS (Complementary Meta)
l Oxide semiconductor) A digital camera including an image sensor is preferable, but a camera of another model may be used as long as the gist of the present invention can be achieved. The camera may be one in the refrigerator,
Multiple units may be installed to check the inside of the refrigerator in detail. In addition, a camera can be mounted on a movable base so that its direction can be remotely controlled from outside the refrigerator. In addition, a camera may be installed not only in a refrigerator but also in a freezer. Such a camera preferably operates in conjunction with a lighting device in the refrigerator. The lowest past selling price is the lowest past selling price stored in information storage means such as a refrigerator database. In other words, it is the cheapest and purchased price. The transition of the past selling price is a change of the past selling price held in the information holding means such as a refrigerator database. By displaying the lowest price and the transition, which are the bottom prices of past sales prices for each product, on the information display means, the past sales prices can be confirmed and used as reference data when purchasing the products.

According to the present invention, the user can be notified of the expiration date in advance by the display unit of the refrigerator before the expiration date. The ratio of products can be reduced. Further, according to the present invention, it is possible to use the camera in the refrigerator to check the products in the refrigerator on the display unit provided outside the refrigerator without opening the refrigerator. By the information processing means of the refrigerator of the present invention,
By comparing the cooking recipe with the database of foods in the warehouse, information on products such as foods that can be made with stored foods and foods that are missing when making specific dishes is output to the information display unit. be able to.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a refrigerator according to the present invention is a label tag attached to a product such as food.
A reader / writer that can read or change the product information of the IC-type non-contact storage medium, an information holding unit including a computer recording medium that stores the product information read by the reader / writer, and an information holding unit. A refrigerator comprising a display means such as a liquid crystal screen for displaying the product information of the stored product. If the product does not have a non-contact type storage medium attached to it, the user attaches the label tag IC type non-contact type storage medium when entering the refrigerator, enters product information in the operation unit of the refrigerator, and uses a reader / writer. The product information of the non-contact storage medium may be rewritten.

More preferably, a refrigerator further includes an operation means such as a touch panel for manually inputting the product information or a microphone for voice input. Preferably, the refrigerator further includes a camera for photographing the inside of the refrigerator, and displays an image in the refrigerator photographed by the camera on a display means such as a liquid crystal screen. By checking the inside of the refrigerator with a camera, it is possible to prevent temperature rise due to opening and closing of the door of the refrigerator and achieve energy saving.
Further, the refrigerator is preferably characterized in that the expiration date of the expiration date is displayed by the display means when a date that is a predetermined number of days before the expiration date is notified from the expiration date. If the expiration date is advanced by opening the product, the product information in the non-contact type storage medium may be rewritten by a reader / writer. Further, a refrigerator is preferably characterized in that a recipe of a dish is stored by an information holding unit, and products lacking in the recipe of the dish are displayed on the display unit based on the product information stored by the information holding unit. As a result, the user can purchase only the minimum deficient ingredients necessary for the recipe, and the user can effectively use the products in the refrigerator to cook. Further, a refrigerator that further includes a communication unit that downloads a recipe of a dish provided by a refrigerator manufacturer or the like via an electric communication line and updates the recipe with the latest one is preferable.

In the present invention, a portable information terminal connected to a refrigerator via a telecommunication line is provided with merchandise information, an image in the refrigerator photographed by a camera inside the refrigerator, a cooking recipe, and a product lacking in the cooking recipe. Refrigerators, which are displayed on a display means of a user terminal by a communication means, are more suitable. This allows the user to check the products in the refrigerator at the user's terminal at the supermarket on the way home from the company, thereby preventing duplicate shopping. Also,
It is possible to purchase in advance the refrigerator products whose expiration date is almost expired, or the products that are almost exhausted because they have only a small remaining amount. In addition, by purchasing cooking recipes made with products in the refrigerator and missing products, the price of new products to purchase can be minimized, and products such as food in the refrigerator can be used effectively without wasting it can.

Examples of the merchandise information stored in the refrigerator database include a merchandise ID, a merchandise name, a manufacturer's desired retail price, a selling price, a manufacturing date, a expiration date, and a purchased date. The date, the date of opening, the number of days to inform the expiration date, the information on the used ingredients, the manufacturer name, the name of the manufacturing factory, the product remaining rate indicating the remaining amount after consumption, in the refrigerator Is preferred. Furthermore, it is preferable that the lowest price of the selling price is displayed on the information display means for each type of the product by using the product name and the selling price. Using the product name and the selling price in the product information, a past change in the selling price is made into a table or a graph, and the lowest selling price in the past is made into a bottom price table. It is also possible to confirm the selling price of the product by referring to the table of the transition of the selling price or the display of the lowest price, and to provide it as reference data when purchasing the product. Here, the bottom price is the lowest price among the prices purchased so far. This price is a reference price indicating that the price is lower than the normal selling price. Also,
The household account book for each product and each genre (meat, cereals, etc.) may be automatically calculated using the product name and the selling price in the product information.

Embodiment [Configuration of Refrigerator] FIG. 1 is a schematic diagram of a refrigerator 1 according to the present invention. An operation display unit 2 for a user to perform various operations and display various information, a computer 3, a CCD camera 4, and an electric communication line 5 are illustrated. FIG. 2 is a schematic diagram of the operation display means 2 which is one of the embodiments according to the present invention. A reader / writer 10 for reading and writing product information in a non-contact storage medium affixed to the product, a display unit 13 made of a liquid crystal screen, an input operation unit 16 for manually inputting information, a voice input And a speaker 15 for notifying a user of information by voice. In addition to the display unit 13 and the speaker 15, a notification lamp 11 made of an LED or the like can be provided in addition to the display unit 13 and the speaker 15 in order to recognize information such as the expiration date.
In addition, communication with the user terminal and cooking recipes are stored in the server 2.
The communication lamp 12 may be turned on during communication to indicate to the user that communication is being performed for downloading from the communication device 6. FIG. 3 is a diagram showing a relation between the computer 3 in the refrigerator according to the present invention and various devices. Computer 3
The operation unit 16 including the operation unit 16 and the display unit 13, the processing unit 21, the information holding unit 22, the database 23 including product information, the computer terminal 27, and the portable information terminal 28
And the like, a communication means 24 for communicating with a server 26 for downloading a cooking recipe, and a camera control means 25 for controlling a CCD camera in the refrigerator.

[Product Information Database] FIG. 4 is an example of a database including product information. The database 30 in the computer stores a product I for identifying the product.
D, manufacturer name, expiration date, a predetermined number of days to notify the expiration date of the expiration date in advance, the remaining rate indicating the rate of the remaining quantity of the product after opening, the selling price that the user actually bought the product, the current refrigerator Includes whether there is stock to indicate whether there is. Refrigerators according to the present invention, such as storing goods in the refrigerator, leaving the goods, notifying of the expiration date, confirming the stock of the goods via a telecommunication line at a remote user terminal, and displaying the goods lacking in the recipe based on the cooking recipe. This database 30
It is performed based on.

FIG. 5 is a flowchart showing a procedure for storing a product in a refrigerator.
When the user enters the product into the refrigerator, the user brings the non-contact storage medium 20 attached to the product close to the reader / writer 10 in the operation display unit 2 of the refrigerator 1. The reader / writer 10 reads the product information stored in the non-contact type storage medium 20 (Step 40). Next, by checking the contents of the databases 23 and 30 by the processing means 21 of the refrigerator 1,
It is confirmed whether it is the goods to be received for the first time (Step 4)
1). The data of the goods to be stocked is database 2
When it is not in the storage areas 3 and 30, it is automatically registered in the databases 23 and 30 at a remaining rate of 100% together with the product information such as the product name. In the case of a product that has been stored once and is to be stored again, since the data is in the databases 23 and 30, the user inputs only the remaining rate from the input operation unit 16. The processing means 21 stores the updated remaining rate in the database 2
3. Reflect on 30.

FIG. 6 is a flowchart showing a procedure for taking out a product from the refrigerator. When the user takes out the product from the refrigerator, the user brings the non-contact storage medium 20 attached to the product close to the reader / writer 10 in the operation display unit 2 of the refrigerator 1. When disposing,
After pressing a discard button (not shown) displayed on the display unit 13 in the vicinity of the reader / writer 10, discard the disc (step 5).
2). Conversely, when not discarded, the merchandise is brought close to the reader / writer 10 and is depressed by pressing a retrieval button (not shown) displayed on the display unit 13 (step 53). When the goods are delivered, the processing means 21 updates the databases 23 and 30.

[Notification of Expiration Date] FIG. 7 is a flowchart showing a procedure for notifying the expiration date of the product. After midnight every day (Step 6
0), the processing means 21 in the refrigerator 1 confirms the product in the database 30 which is "predetermined number of days" before "expiration date" (step 61). If there is no product that is "predetermined number of days" before the "expiration date", nothing functions until the next day. However, when there is such a product, the notification lamp 11 is lit, and the product name or the like whose expiration date has expired is displayed to alert the user to consume the product quickly (steps 62 and 63).

[Confirmation of Commodities: Operation Display Means of Refrigerator] FIG. 8 is a flowchart showing a procedure for confirming the commodities without the user opening the refrigerator door. A confirmation button (not shown) on the display unit 13 is pressed (step 70). The inside of the refrigerator is photographed by the CCD camera 4 inside the refrigerator controlled by the camera control means 25 (step 71). The photographed image in the refrigerator starts to be displayed on the display unit 13 (step 72). Further, the product information of the product such as food in the refrigerator stored in the database is displayed on the display unit 13 (step 73).

[Confirmation of Product: User Terminal Connected to Refrigerator via Telecommunication Line] FIG. 9 shows a procedure for confirming a product in the refrigerator from the user terminal connected to the refrigerator via the telecommunication line. It is a flowchart. The user terminals are a computer terminal 27, a mobile phone 28, a P
HS28, portable information terminal 28, and the like. The user clicks the confirmation button in the software (not shown) that accesses the refrigerator pre-registered in the user terminal from the outside or uses website browsing software such as Microsoft Explorer or Netscape Netscape. Communication means 24 of the refrigerator via an electric communication line.
(Steps 80 to 81). The inside of the refrigerator is photographed by the CCD camera 4 inside the refrigerator controlled by the camera control means 25 (step 8).
2). The image in the refrigerator photographed on the display unit of the user terminal and the data on the remaining amount of the product such as food in the database are transmitted via the communication means 24 (step 83). Further, the transmitted image of the refrigerator and the remaining amount data in the product information data such as food are received by the user terminal and displayed on the display unit of the user terminal (steps 84 and 85).

[Cooking Recipe] FIG. 10 is a flowchart showing a procedure for downloading a cooking recipe to a refrigerator and notifying a user of a shortage of foods necessary for cooking a certain dish. First, the user presses a cooking recipe download button (not shown) on the display unit 13 in the refrigerator (step 90). The user accesses a website through which a recipe provided by a refrigerator manufacturer or the like can be obtained via an electric communication line (step 91). The download of the cooking recipe is started and stored in the information holding unit 22 (step 9).
2). The user presses a cooking recipe confirmation button (not shown) on the display unit 13 of the refrigerator (step 93). The processing unit 21 refers to the databases 23 and 30 and selects a recommended recipe based on the current product remaining amount (step 9).
4). Next, the recommended recipe is displayed on the display unit 13, and the products to be purchased are displayed at the same time (step 9).
5).

[0030]

According to the display of the refrigerator according to the present invention,
The user can be notified of the expiration date in advance of the expiration date, and the ratio of commodities such as food that are discarded without being used due to the expiration of the expiration date in the refrigerator can be reduced. In addition, the camera in the refrigerator according to the present invention allows the user to check the products in the refrigerator on the display unit of the refrigerator or the user terminal at a remote place without opening the refrigerator. For example, the user can acquire the contents of the database and the video in the storage from the outside. As a result, in the case of going shopping directly from the office, after checking the contents of the refrigerator, it is possible to purchase products such as missing foods. The processing means of the refrigerator of the present invention compares the recipe with the database, and displays information of products such as foods that can be made with stored products such as foods and foods that are insufficient when making a specific food. Can be output to

[Brief description of the drawings]

FIG. 1 is a schematic view of a refrigerator 1 according to one embodiment of the present invention.

FIG. 2 is a schematic diagram of an operation display unit 2 which is one of the embodiments according to the present invention.

FIG. 3 is a diagram showing a relationship between a computer 3 in the refrigerator according to the present invention and various devices.

FIG. 4 is an example of a database including product information in a refrigerator according to the present invention.

FIG. 5 is a flowchart illustrating a procedure for storing a product into a refrigerator according to the present invention.

FIG. 6 is a flowchart showing a procedure for taking out a product from a refrigerator according to the present invention.

FIG. 7 is a flowchart showing a procedure for notifying the expiration date of a product according to the present invention.

FIG. 8 is a flowchart showing a procedure for confirming a product without a user opening a refrigerator door according to the present invention.

FIG. 9 is a flowchart showing a procedure for confirming a product in a refrigerator from a user terminal connected to the refrigerator via a telecommunication line according to the present invention.

FIG. 10 is a flowchart showing a procedure for downloading a cooking recipe according to the present invention to a refrigerator and notifying a user of a shortage of products in the refrigerator when cooking a certain dish.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Operation display means 3 Computer 4 CCD camera 5 Telecommunication line 10 Reader / writer 11 Notification lamp 12 Communication lamp 13 Information display part 14 Microphone 15 Speaker 16 Operation part 20 Non-contact type storage medium 21 Processing means 22 Information holding means 23 Database 24 communication means 25 camera control means 26 server 27 computer terminal 28 portable information terminal 30 database

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G06F 17/60 176 G06F 17/60 176A G06K 17/00 G06K 17/00 L

Claims (10)

[Claims] 1. A reader / writer for writing information to a non-contact type storage medium and reading information from the non-contact type storage medium; an information holding unit for storing information read by the reader / writer; Information display means for displaying the stored information. 2. The refrigerator according to claim 1, further comprising input operation means for inputting the information manually or by voice. 3. The refrigerator according to claim 1, further comprising a camera for photographing the inside of the refrigerator, and image display means for displaying an image in the refrigerator photographed by the camera. 4. The refrigerator according to claim 3, wherein the information display means and the image display means are the same display means. Claim 5: Within a predetermined number of days before the expiration date,
The refrigerator according to any one of claims 1 to 4, wherein the display means indicates that the expiration date is imminent. 6. The information holding means holds a recipe of a dish, and based on the information held by the information holding means, a product lacking in the recipe of the dish can be displayed on the information display means. The refrigerator according to any one of claims 1 to 5. 7. The refrigerator according to claim 6, further comprising communication means for downloading or uploading various kinds of information that can include a recipe for cooking via an electric communication line. 8. The telecommunication circuit according to claim 1, wherein said information, an image in a refrigerator taken by said camera, a cooking recipe, and one or more pieces of information selected from a group consisting of a product lacking in the cooking recipe. 8. The refrigerator according to claim 7, wherein the display is performed by a communication unit on a display unit of the user terminal connected to the refrigerator via the communication unit. 9. The information includes a product identification code, a product name, a manufacturer's desired retail price, a selling price, a production date, a expiration date, a purchase date, and a year when the product was opened. From the date, a predetermined number of days to notify the expiration date, information on the ingredients used in the product, the manufacturer name, the manufacturing factory name, the remaining product rate, and the presence or absence in the refrigerator The refrigerator according to any one of claims 1 to 8, further comprising information of one or more items selected from a group of information items. 10. The information includes a product name and a selling price, and the information is used to display the lowest price of past selling prices and / or the transition of past selling prices for each product using the information. The refrigerator according to claim 9, wherein the information is displayed on a means.