Trays, refrigerators, and tray systems

Abstract

To provide a tray, a refrigerator, and a tray system with which, when an article is newly placed on the tray, it is possible to install reset means for resetting the initial load, without adding new hardware.SOLUTION: A milk tray 11 has a milk carton 90 placed on it. The milk tray 11 comprises an article sensor 16, a storage unit 14, a determination unit 18, and a setting unit 19. The article sensor 16 detects the weight of the milk carton 90. The storage unit 14 stores the weight of the milk carton 90. The determination unit 18 compares the first weight of the milk carton 90 that is detected by the article sensor 16 and stored in the storage unit 14 with the second weight of the milk carton 90 that is detected by the article sensor 16 after the first weight is detected, and thereby determines whether the second weight is heavier than the first weight. When it is determined by the determination unit 18 that the second weight is heavier than the first weight, the setting unit 19 sets the second weight as the initial weight of the milk carton 90.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tray, a refrigerator, and a tray system. [Background technology]

[0002] For example, Patent Document 1 discloses a food storage facility for storing food, which is equipped with multiple chambers for storing food by type, a detection means for detecting the type of food being stored in the chambers, and a measurement means for measuring the amount of food being stored in the chambers or information correlated to the amount. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-185327 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in an inventory management system such as that shown in Patent Document 1, which measures the weight of food using a measuring means and displays the degree of consumption of that food as a ratio to the initial weight, a reset means for resetting the initial weight when new food is placed on the tray needs to be formed by a button provided on the device or hardware such as a camera or scanner.

[0005] Therefore, an object of the present invention is to provide a tray, refrigerator, and tray system that can be installed with a reset means for resetting the initial weight when a new item is placed on the tray without adding new hardware. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a tray that is placed in a storage facility and on which an item is placed. The tray includes a detection unit, a memory unit, a determination unit, and a setting unit. The detection unit detects the weight of the item. The memory unit stores the weight of the item detected by the detection unit. The determination unit compares a first weight of the item detected by the detection unit and stored in the memory unit with a second weight of the item detected by the detection unit after the first weight is detected, thereby determining whether the second weight is heavier than the first weight. If the determination unit determines that the second weight is heavier than the first weight, the setting unit sets the second weight as the initial weight of the item. [Effects of the Invention]

[0007] As described above, according to the present invention, a resetting means for resetting the initial weight of an article when a new article is placed on the tray can be installed without adding any new hardware to the tray. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing an example of a tray system according to a first embodiment of the present invention. [Figure 2] 1 is a diagram showing a milk tray according to an embodiment of the present invention; [Figure 3] 2 is a diagram showing an example of the functional configuration of a control unit in the milk tray shown in FIG. 1. FIG. [Figure 4] 2 is a diagram illustrating an example of a functional configuration of a control unit in the communication terminal illustrated in FIG. 1. [Figure 5] 10 is a diagram showing the change in weight of a milk carton when the weight of the milk carton decreases over time in a milk tray according to an embodiment of the present invention. FIG. [Figure 6] 10 is a flow chart showing how to obtain the initial weight of a milk carton in accordance with a change in the weight of the milk carton in a milk tray according to an embodiment of the present invention. FIG. [Figure 7] 10 is a diagram showing a change in weight of a milk carton when the milk carton is pushed into a holder in the milk tray of the second embodiment of the present invention. FIG. [Figure 8]FIG. 10 is a diagram showing the change in weight of a milk carton when the milk carton is not placed on the holder for a certain period of time or more in the milk tray of the third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] [First embodiment] A first embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a block diagram showing an example of a tray system 10 according to the embodiment of the present invention. Fig. 2 is a diagram showing a milk tray 11 according to the embodiment of the present invention.

[0010] As shown in Fig. 1, the tray system 10 includes a milk tray 11 (an example of a "tray"), a network 20, and a communication terminal 30. The milk tray 11 and the communication terminal 30 are connected via the network 20. Communication between the milk tray 11 and the communication terminal 30 may be wired or wireless.

[0011] Milk cartons 90 (an example of an "item") are placed on the milk tray 11. The milk tray 11 is a tray that holds the milk cartons 90. The milk tray 11 is placed in a refrigerator (an example of a "storage cabinet") not shown. In other words, the tray 11 is stored in a refrigerator (an example of a "storage cabinet") not shown. The milk tray 11 is identified by, for example, an ID (identifier). The milk tray 11 is recognized as being held on the milk tray 11 by the user of the refrigerator registering in advance that he or she holds a milk carton 90.

[0012] As shown in Figures 1 and 2, the milk tray 11 includes a holder 12 (an example of a "placing unit"), a control unit 13, a memory unit 14, a communication unit 15, an item sensor 16, a power supply unit 17, etc.

[0013] A milk carton 90 is placed on the holder 12. Specifically, the holder 12 holds the milk carton 90. The holder 12 has, for example, a rectangular shape with ribs around the periphery in order to hold the milk carton 90.

[0014] The control unit 13 is a central processing unit (CPU), a micro-processing unit (MPU), or the like, and executes various information processes according to programs stored in the storage unit 14 .

[0015] The memory unit 14 is a flash memory, a RAM (Random Access Memory), or the like, and stores programs executed by the control unit 13 or various data. The memory unit 14 also operates as a work memory for the control unit 13. The memory unit 14 stores the weight of the milk carton 90 detected by the item sensor 16.

[0016] The communication unit 15 is an interface or the like, and communicates with the communication terminal 30 via the network 20.

[0017] The item sensor 16 (an example of a "detection unit") detects whether or not a milk carton 90 is held in the holder 12. Examples of the item sensor 16 include a weight sensor and a pressure sensor. The item sensor 16 detects the weight of the milk carton 90 placed on the holder 12. More specifically, the item sensor 16 detects the weight of the milk carton 90 placed on the holder 12 when the milk carton 90 is placed on the holder 12. The item sensor 16 detects the weight of the milk carton 90 each time the milk carton 90 is placed on the holder 12, and transmits the detection result to the memory unit 14.

[0018] The power supply unit 17 supplies power to each part of the milk tray 11. Examples of the power supply unit 17 include a battery and a storage battery.

[0019] The network 20 is, for example, the Internet or Bluetooth (registered trademark).

[0020] The communication terminal 30 is a terminal capable of communicating with the milk tray 11, such as a smartphone, tablet, or wearable device. The communication terminal 30 is identified by, for example, an ID. The communication terminal 30 stores application software for receiving information from the milk tray 11 and displaying it. The communication terminal 30 includes a control unit 31, a memory unit 32, a communication unit 33, a display unit 34, and the like. The main components of the control unit 31, the memory unit 32, and the communication unit 33 are similar to those of the control unit 13, the memory unit 14, and the communication unit 15 of the milk tray 11, and therefore a description thereof will be omitted. The display unit 34 displays various information. More specifically, the display unit 34 displays the percentage (%) of milk relative to the total amount of milk cartons 90 currently held in the milk tray 11, or the amount of milk remaining in each milk carton 90, etc.

[0021] Next, the control unit 13 will be described in detail with reference to Fig. 3. Fig. 3 is a diagram showing an example of the functional configuration of the control unit 13 in the milk tray 11 shown in Fig. 1. As shown in Fig. 3, the control unit 13 includes a determination unit 18 and a setting unit 19.

[0022] The determination unit 18 determines whether the weight of the milk carton 90 currently held in the holder 12 is heavier than the weight of the milk carton 90 previously held in the holder 12. More specifically, the determination unit 18 compares a first weight (past weight value) of the milk carton 90 detected by the item sensor 16 and stored in the memory unit 14 with a second weight (current weight value) of the milk carton 90 detected by the item sensor 16 after the first weight is detected, and determines whether the second weight is heavier than the first weight. That is, the determination unit 18 determines whether the milk carton 90 currently held in the holder 12 is an opened (used) carton or a new (unopened) carton based on the weight of the milk carton 90. Here, the first weight is the weight of the milk carton 90 detected by the item sensor 16 at a predetermined time and stored in the memory unit 14. The second weight is the weight of the milk carton 90 detected by the item sensor 16 at a time after the time the first weight is detected, and is the weight of the milk carton 90 held in the holder 12 at the time of judgment by the judgment unit 18.

[0023] When the determination unit 18 determines that the weight of the milk carton 90 currently held in the holder 12 is heavier than the weight of the milk carton 90 previously held in the holder 12, the setting unit 19 sets the weight of the milk carton 90 currently held in the holder 12 as the initial weight of the milk carton 90. In other words, the setting unit 19 sets the weight of the milk carton 90 by assuming that the milk carton 90 currently held in the holder 12 is a new, unopened milk carton 90 (or a milk carton 90 different from the milk carton 90 previously held in the holder 12). More specifically, when the determination unit 18 determines that the second weight (current weight value) of the milk carton 90 is heavier than the first weight (past weight value) of the milk carton 90, the setting unit 19 sets the second weight as the initial weight (initial weight value) of the milk carton 90. Here, the initial weight of the milk carton 90 is the initial weight value of the milk carton 90 when managing the weight of the milk carton 90 in the milk tray 11, and is the weight of a new milk carton 90 before opening, or the weight of a milk carton 90 that is different from and heavier than the milk carton 90 previously held in the holder 12.

[0024] Next, the control unit 31 of the communication terminal 30 will be described in detail with reference to Fig. 4. Fig. 4 is a diagram showing an example of the functional configuration of the control unit 31 in the communication terminal 30 shown in Fig. 1. As shown in Fig. 4, the control unit 31 in this embodiment includes an item information acquisition unit 35, an item information processing unit 36, and a notification unit 37.

[0025] The item information acquisition unit 35 acquires information about the milk cartons 90 transmitted from the milk tray 11. More specifically, the item information acquisition unit 35 acquires the weights (first weight, second weight, initial weight) of the milk cartons 90 transmitted from the milk tray 11. The information about the milk cartons 90 acquired by the item information acquisition unit 35 is stored in the memory unit 32.

[0026] The item information processing unit 36 ​​updates the information on the milk cartons 90 stored in the memory unit 32 based on the information on the milk cartons 90 acquired by the item information acquisition unit 35. More specifically, the item information processing unit 36 ​​updates, for example, the first weight of the milk carton 90 stored in the memory unit 32 to the second weight of the milk carton 90 acquired by the item information acquisition unit 35. The item information processing unit 36 ​​compares, for example, the first weight of the milk carton 90 stored in the memory unit 32 with the second weight of the milk carton 90 acquired by the item information acquisition unit 35, and calculates the percentage (%) of milk in all the milk cartons 90 currently held in the milk tray 11, the amount of milk remaining in the milk carton 90, etc.

[0027] The notification unit 37 notifies the user of the refrigerator based on the information about the milk cartons 90 updated by the item information processing unit 36. The notification unit 37 notifies by displaying the information on the display unit 34. The notification unit 37 displays the percentage (%) of milk in the entire milk carton 90 calculated by the item information processing unit 36 ​​on the display unit 34. By displaying the percentage (%) of milk in the entire milk carton 90 on the display unit 34, the notification unit 37 can notify the user of the refrigerator of the amount of milk remaining in the milk carton 90.

[0028] Next, with reference to Figures 5 and 6, we will explain how to obtain the initial weight of the milk carton 90 based on changes in the weight of the milk carton 90 in the milk tray 11 of this embodiment. Figure 5 is a diagram showing changes in the weight of the milk carton 90 when the weight of the milk carton 90 decreases over time in the milk tray 11 of this embodiment of the present invention. Figure 6 is a flow diagram showing how to obtain the initial weight of the milk carton 90 based on changes in the weight of the milk carton 90 in the milk tray 11 of this embodiment of the present invention.

[0029] In the milk tray 11, the weight of the same milk carton 90 decreases unilaterally as it is consumed, so when the weight of the milk carton 90 increases, it is determined that it has been replaced with a new milk carton 90. Therefore, the weight of the milk carton 90 when it has increased is stored as the new initial weight of the milk carton 90.

[0030] As shown in FIG. 5, in the milk tray 11, when a milk carton 90 is placed on the holder 12 (FIG. 5(1)) of the milk tray 11 in a state where no milk carton 90 is placed thereon (initial state), the weight of the milk carton 90 is detected. Furthermore, the detected weight of the milk carton 90 is set as the initial weight of the milk carton 90 (FIG. 5(2)). Thereafter, when a user of the refrigerator uses milk from the milk carton 90 (FIG. 5(3)), the weight of the milk carton 90 is detected each time the milk carton 90 is placed on the holder 12 of the milk tray 11, and the detected weight of the milk carton 90 is stored in the memory unit 14 as the first weight (FIG. 5(4)). Meanwhile, the first weight of the milk carton 90 stored in the memory unit 14 is compared with the weight of the milk carton 90 (second weight) detected by the item sensor 16, and a new initial weight of the milk carton 90 is obtained based on the comparison result (FIG. 5(5)).

[0031] More specifically, as shown in FIG. 6, when the item sensor 16 changes from "0" or when it determines that a milk carton 90 has been placed on the holder 12 of the milk tray 11, and the item sensor 16 detects the weight (second weight) of the milk carton 90 (S1), the judgment unit 18 of the control unit 13 compares the first weight of the milk carton 90 stored in the memory unit 14 with the weight (second weight) of the milk carton 90 detected by the item sensor 16, and determines whether the weight (second weight) of the milk carton 90 detected by the item sensor 16 is heavier than the first weight of the milk carton 90 stored in the memory unit 14 (S2).

[0032] If it is determined that the weight (second weight) of the milk carton 90 detected by the item sensor 16 is heavier than the first weight of the milk carton 90 stored in the memory unit 14 (S2-Yes), the setting unit 19 of the control unit 13 sets the weight (second weight) of the milk carton 90 detected by the item sensor 16 as the initial weight of the milk carton 90 (S3). Furthermore, the set initial weight of the milk carton 90 is stored in the memory unit 14 (S4). The initial weight of the milk carton 90 stored in the memory unit 14 is transmitted to the communication terminal 30 via the communication unit 15 (S5) and is displayed on the display unit 34, for example, as the ratio (100%) of milk to the entire milk carton 90.

[0033] On the other hand, if it is determined that the weight (second weight) of the milk carton 90 detected by the item sensor 16 is not heavier than the first weight of the milk carton 90 stored in the memory unit 14 (S2-No), the setting unit 19 of the control unit 13 updates the weight (second weight) of the milk carton 90 detected by the item sensor 16 as the first weight (S6). Then, the updated weight (first weight) of the milk carton 90 is transmitted to the communication terminal 30 via the communication unit 15 (S7) and is displayed on the display unit 34, for example, as a percentage (%) of milk to the entire milk carton 90.

[0034] In this way, the initial weight of the milk carton 90 is obtained by detecting the change in weight of the milk carton 90, so a reset means for resetting the initial weight of the milk carton 90 can be installed without adding any new hardware.

[0035] [Second embodiment] Next, a milk tray 11 according to a second embodiment will be described with reference to Fig. 7. The milk tray 11 according to the second embodiment differs from the first embodiment in that the initial weight of the milk carton 90 is obtained by weighting. In the second embodiment, differences from the first embodiment will be mainly described below. Fig. 7 is a diagram showing the change in weight of the milk carton 90 when the milk carton 90 is pushed into the holder 12 in the milk tray 11 according to the embodiment of the present invention.

[0036] When a weight equal to or greater than a specified value is pressed against the holder 12 for a specified time, the setting unit 19 of the milk tray 11 in this embodiment sets the second weight, which subsequently falls within the specified value, as the initial weight of the milk carton 90. In other words, when placing a milk carton 90 on the holder 12, the milk tray 11 presses the milk carton 90 toward the placing surface of the holder 12, and when the weight value of the milk carton 90 detected by the item sensor 16 becomes equal to or greater than a specified value, it determines that the milk carton 90 has been replaced with a new milk carton 90. After a specified time has passed, the refrigerator user removes their hand from the milk carton 90 on the holder 12, which triggers the detection of the weight of the milk carton 90 again, and the detected weight of the milk carton 90 is newly stored as the initial weight of the milk carton 90.

[0037] In the milk tray 11, the user of the refrigerator presses the holder 12 with a milk carton 90 for a predetermined time (for example, 1 to 3 seconds), and then when the user releases his / her hand from the milk carton 90, the weight (second weight) of the milk carton 90 detected by the item sensor 16 is set as the initial weight of the milk carton 90.

[0038] Furthermore, when the second weight detected by the item sensor 16 returns to a weight equal to or less than the rated weight of the item sensor 16 after a predetermined time from a weight heavier than the rated weight of the item sensor 16, the setting unit 19 sets the second weight, which has returned to a weight equal to or less than the rated weight, as the initial weight of the milk carton 90. Specifically, as shown in FIG. 7, in the milk tray 11, when a milk carton 90 is placed on the holder 12 (FIG. 7(1)) of the milk tray 11 in a state where no milk carton 90 is placed thereon (initial state), the weight of the milk carton 90 is detected. At this time, when a user of the refrigerator pushes the milk carton 90 into the holder 12, the weight detected by the item sensor 16 becomes a weight heavier than the rated weight of the item sensor 16 (FIG. 7(5)). Here, the rated weight of the item sensor 16 is a weight corresponding to the maximum weighing capacity of the item sensor 16, and is a load that can be applied to the item sensor 16. Then, when the user releases the milk carton 90, the weight detected by the item sensor 16 becomes a weight equal to or less than the rated weight of the item sensor 16, and finally becomes the weight of the milk carton 90 (second weight) (FIG. 7(2)). Therefore, when the user places a new milk carton 90 or the like into the milk carton 90, the milk carton 90 presses the holder 12, causing the weight detected by the item sensor 16 to become heavier than the rated weight of the item sensor 16, thereby recognizing that a new milk carton 90 or the like has been placed in the milk tray 11. Note that although the specified weight has been described as the rated weight of the item sensor 16, it is not limited to this, and may be set appropriately within the rated weight of the item sensor 16. For example, when placing a beverage such as a milk carton, a specified weight of 2.5 kg would enable the management of a 2-liter PET bottled beverage. The specified weight may also be set by the user.

[0039] In this way, the initial weight of the milk carton 90 is obtained by pressing the holder 12 with the milk carton 90 for a predetermined time, so a reset means for resetting the initial weight of the milk carton 90 can be installed without adding any new hardware.

[0040] [Third embodiment] Next, a milk tray 11 of a third embodiment will be described with reference to Fig. 8. The milk tray 11 of the third embodiment differs from the first embodiment in that the initial weight of the milk carton 90 is obtained when the milk carton 90 is not placed on the holder 12 for a certain period of time or more. In the third embodiment, the differences from the first embodiment will be mainly described below. Fig. 8 is a diagram showing the change in weight of the milk carton 90 when the milk carton 90 is not placed on the holder 12 for a certain period of time or more in the milk tray 11 of the embodiment of the present invention.

[0041] In this embodiment, when the item sensor 16 detects the second weight after a certain period of time has elapsed since the first weight was detected, the setting unit 19 sets the second weight as the initial weight of the milk carton 90. Specifically, in the milk tray 11, milk cartons 90 of different volumes, such as a 1 L milk carton 90 and a 500 mL milk carton 90, may be swapped and placed in the holder 12. For example, as shown in FIG. 8, after a 1 L milk carton 90 is placed on the holder 12 (FIG. 8(2)), if a 500 mL milk carton 90 is placed on the holder 12 (FIG. 8(2')), normally, if the second weight (FIG. 8(2')) of the milk carton 90 detected by the item sensor 16 is lighter than the first weight (FIG. 8(4)) of the milk carton 90 stored in the memory unit 14, the detected second weight (FIG. 8(2')) of the milk carton 90 will be The detected second weight (FIG. 8(2')) of the milk carton 90 is updated as the first weight and stored in the memory unit 14. However, since the milk carton 90 (500 mL milk carton 90) actually placed on the holder 12 is different from the previous milk carton 90 (1 L milk carton 90), if the detected second weight (FIG. 8(2')) of the milk carton 90 is stored as the weight (first weight) of the previous milk carton 90 (1 L milk carton 90), the milk carton 90 cannot be managed adequately.

[0042] Therefore, in the setting unit 19 of the milk tray 11, if the item sensor 16 detects a second weight of the milk carton 90 after a certain period of time (FIG. 8(1')) has elapsed since detecting the first weight of the milk carton 90 (FIG. 8(4)), it determines that the previous milk carton 90 has been replaced with a new milk carton 90, and sets the detected second weight of the milk carton 90 as the initial weight of the milk carton 90 (FIG. 8(2')). Here, the certain period is, for example, a period of 5 days to 1 week, and is a time that is set taking into consideration the expiration date of the milk carton 90 placed on the holder 12 (the expiration date of the item placed on the tray), etc. Note that when setting the detected second weight of the milk carton 90 as the initial weight of the milk carton 90, the display unit 34 of the communication terminal 30 displays a message confirming that a new milk carton 90 has been placed on the holder 12, and sets the initial weight of the milk carton 90 after receiving a confirmation signal from the communication terminal 30.

[0043] As described above, according to the embodiment of the present invention, the initial weight of the milk carton 90 can be set based on the weight value of the item sensor 16 mounted on the milk tray 11, so that when a new milk carton 90 is placed on the milk tray 11, a reset means for resetting the initial weight of the milk carton 90 can be installed without adding new hardware to the milk tray 11. Therefore, the milk tray 11 can be manufactured at low cost.

[0044] In the embodiment of the present invention, a milk carton 90 is cited as an example of the item, but the item is not limited to this and may be, for example, a bottle, can, or paper carton of juice, beer, or other beverage, or food such as eggs.

[0045] Furthermore, in the embodiment of the present invention, the milk tray 11 is given as an example of a tray, but the tray is not limited to this, and may be, for example, an egg tray for holding eggs.

[0046] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments and can be embodied in various forms without departing from the spirit and scope of the present invention. The drawings mainly show each component in a schematic manner for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. Furthermore, the materials, shapes, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited, and various modifications are possible within a scope that does not substantially deviate from the configuration of the present invention. [Explanation of symbols]

[0047] 11 Milk tray (tray) 14 Storage section 16 Item sensor (detection part) 18 Judgment section 19 Setting section 90 Milk carton (item)

Claims

1. A tray that is placed in a storage cabinet and on which an item is placed, a detection unit that detects the weight of the item; a storage unit that stores the weight of the item detected by the detection unit; a determination unit that determines whether a first weight of the object detected by the detection unit and stored in the memory unit is greater than a second weight of the object detected by the detection unit after the first weight is detected; and a setting unit that sets the second weight as an initial weight of the item when the determining unit determines that the second weight is heavier than the first weight; a placement section on which the article is placed; Equipped with The setting unit sets the second weight as the initial weight of the item when the placement unit is pressed for a predetermined period of time by the item whose second weight is detected by the detection unit.

2. A tray that is placed in a storage facility and on which an item is placed, a detection unit that detects the weight of the item; a storage unit that stores the weight of the item detected by the detection unit; a determination unit that determines whether a first weight of the object detected by the detection unit and stored in the memory unit is greater than a second weight of the object detected by the detection unit after the first weight is detected; and a setting unit that sets the second weight as an initial weight of the item when the determining unit determines that the second weight is heavier than the first weight; Equipped with A tray in which, when the second weight detected by the detection unit returns from a weight heavier than the rated weight of the detection unit to a weight less than the rated weight after a predetermined time, the setting unit sets the second weight that has returned to a weight less than the rated weight as the initial weight of the item.

3. The tray according to claim 1 or claim 2, wherein the setting unit sets the second weight as the initial weight of the item when the detection unit detects the second weight a certain period of time or more after detecting the first weight.

4. The tray according to claim 1 , further comprising a communication unit that transmits information relating to the weight of the article detected by the detection unit.

5. A refrigerator having a tray on which items are placed, The tray is a detection unit that detects the weight of the item; a storage unit that stores the weight of the item detected by the detection unit; a determination unit that determines whether a first weight of the object detected by the detection unit and stored in the memory unit is greater than a second weight of the object detected by the detection unit after the first weight is detected; and a setting unit that sets the second weight as an initial weight of the item when the determining unit determines that the second weight is heavier than the first weight; a placement section on which the article is placed; Equipped with The setting unit sets the second weight as the initial weight of the item when the storage unit is pressed for a predetermined period of time by the item whose second weight is detected by the detection unit.

6. A refrigerator having a tray on which items are placed, The tray is a detection unit that detects the weight of the item; a storage unit that stores the weight of the item detected by the detection unit; a determination unit that determines whether a first weight of the object detected by the detection unit and stored in the memory unit is greater than a second weight of the object detected by the detection unit after the first weight is detected; and a setting unit that sets the second weight as an initial weight of the item when the determining unit determines that the second weight is heavier than the first weight; Equipped with When the second weight detected by the detection unit returns from a weight heavier than the rated weight of the detection unit to a weight equal to or less than the rated weight after a predetermined time, the setting unit sets the second weight that has returned to a weight equal to or less than the rated weight as the initial weight of the item.

7. The tray according to claim 4; a storage unit that stores the information transmitted from the tray; a notification unit that notifies the information; A tray system comprising:

Images