Refrigerator

Abstract

To provide a refrigerator capable of improving convenience.SOLUTION: A refrigerator according to an embodiment includes a housing, a first door, a first detecting unit, a second detecting unit, a door opening device, and a control unit. The housing includes a first storage chamber. The first door can close an opening of the first storage chamber. The first detecting unit can detect a prescribed motion of a user with respect to the first door. The second detecting unit can detect a proximity state of the user with respect to the first door. The door opening device can operate to open the first door. The control unit controls the door opening device. The control unit operates the door opening device on the basis of a change in a detection result of the second detecting unit after the prescribed motion is detected by the first detecting unit.SELECTED DRAWING: Figure 20

Description

Technical Field

[0001] Embodiments of the present invention relate to a refrigerator.

Background Art

[0002] There has been proposed a refrigerator including a contact detection unit provided on a door of the refrigerator and a door opening device that opens the door when the user's contact is detected by the contact detection unit. By the way, further improvement in convenience is expected for the refrigerator.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide a refrigerator capable of improving convenience.

Means for Solving the Problems

[0005] The refrigerator according to the embodiment includes a housing, a first door, a first detection unit, a second detection unit, a door opening device, and a control unit. The housing includes a first storage chamber. The first door can close the opening of the first storage chamber. The first detection unit can detect a predetermined operation of the user with respect to the first door. The second detection unit can detect the proximity state of the user with respect to the first door. The door opening device is operable to open the first door. The control unit controls the door opening device. After the predetermined operation is detected by the first detection unit, the control unit operates the door opening device based on a change in the detection result of the second detection unit.

Brief Description of the Drawings

[0006]

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Embodiments for Carrying Out the Invention

[0007] Hereinafter, the refrigerator according to the embodiment will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. And the overlapping description of those configurations may be omitted. In the present application, “based on XX” means “based on at least XX”, and may include cases based on another element in addition to XX. Also, “based on XX” is not limited to the case where XX is directly used, and may include cases based on those obtained by performing arithmetic or processing on XX. In the present application, “XX or YY” is not limited to either one of XX and YY, and may include both cases of XX and YY. This is the same even when there are three or more selectable elements. XX and YY are arbitrary elements (for example, arbitrary information). In the present application, the up, down, left, and right are defined based on the direction in which the user standing in front of the refrigerator views the refrigerator. Also, in the present application, when viewed from the refrigerator, the side closer to the user standing in front of the refrigerator is defined as “front”, and the side farther from the user standing in front of the refrigerator is defined as “rear”.

[0008] <A. First Embodiment> <1. Overall Configuration of Home Appliance System> FIG. 1 is a diagram showing the overall configuration of the home appliance system 1 according to the first embodiment. The home appliance system 1 includes, for example, a refrigerator 100, a server 200, and a terminal device 300. The network NW described later may be, for example, the Internet, a cellular network, a Wi-Fi network, LPWA (Low Power Wide Area), WAN (Wide Area Network), LAN (Local Area Network), or other public lines or dedicated lines, which may be used according to the situation.

[0009] (Refrigerator) The refrigerator 100 is a home appliance used by the user U and is placed within the user U's residence. The refrigerator 100 is connected to the network NW via, for example, a wireless router WR and a modem M installed within the user U's residence. The refrigerator 100 can communicate with the server 200 or the terminal device 300 via the network NW. The refrigerator 100 may also be able to communicate directly with the terminal device 300 using short-range wireless communication such as Bluetooth (registered trademark). Note that the refrigerator 100 may not have the above-described communication function. That is, the refrigerator 100 may be used independently without being related to the server 200 or the terminal device 300.

[0010] (Server) The server 200 is a management server that manages the refrigerator 100. The server 200 is composed of one or more server devices (for example, a cloud server). The server 200 can communicate with the refrigerator 100 or the terminal device 300 via the network NW. The server 200 may include an information processing unit that performs edge computing or fog computing, such as an information processing unit included in a router in the network NW. The server 200 is not limited to a cloud server and may be a computer in the user U's residence or a home router, etc.

[0011] (Terminal Device) The terminal device 300 is an electronic device that can be used by the user U independently of the refrigerator 100. The terminal device 300 is, for example, a portable terminal device such as a smartphone or a tablet terminal device. However, the terminal device 300 is not limited to a portable terminal device and may be a personal computer or the like.

[0012] The terminal device 300 includes, for example, a display device 301, an input device 302, and a communication unit 303. The display device 301 is, for example, a liquid crystal display or an organic EL (Electro Luminescence) display, and has a display screen 301a capable of displaying various information. The input device 302 can receive the input of the user U. The input device 302 is, for example, a touch panel provided overlapping the display screen 301a. The input device 302 may include a camera, a microphone, etc. provided in the terminal device 300. The communication unit 303 is, for example, a communication module capable of wireless communication. The communication unit 303 is connected to the network NW via a wireless router WR and a modem M or directly. The communication unit 303 can communicate with the refrigerator 100 or the server 200 via the network NW. The communication unit 303 may be able to communicate directly with the refrigerator 100 using short-range wireless communication such as Bluetooth (registered trademark).

[0013] An application program P is installed in the terminal device 300, and the functions described below are supported. The application program P is, for example, an application program for managing the refrigerator 100. Hereinafter, the application software started by executing the application program P is referred to as "home appliance management app AP".

[0014] <2. Configuration of the Refrigerator> <2.1 Exterior Configuration of the Refrigerator> Next, the configuration of the refrigerator 100 will be described in detail. FIG. 2 is a front view showing the refrigerator 100. The refrigerator 100 includes, for example, a housing 10 and a plurality of doors 20.

[0015] The housing 10 is a box-shaped member that forms the outer shell of the refrigerator 100. The housing 10 contains a foamed heat insulating material such as urethane foam and has heat insulating properties. Inside the housing 10, a plurality of storage chambers 11 are provided. The plurality of storage chambers 11 include, for example, a refrigerating chamber 11A, a chilled chamber 11Aa, a vegetable chamber 11B, an ice-making chamber 11C, a small freezing chamber 11D, and a main freezing chamber 11E. The refrigerating chamber 11A is cooled to a refrigerating chamber temperature range with an average temperature of about 2°C to 6°C, for example. The chilled chamber 11Aa is cooled to a chilled temperature range with an average temperature of about -1°C to +1°C, for example. The vegetable chamber 11B is cooled to a vegetable chamber temperature range with an average temperature of about 3°C to 7°C, for example. The ice-making chamber 11C, the small freezing chamber 11D, and the main freezing chamber 11E are cooled to a freezing chamber temperature range with an average temperature of about -20°C to -18°C, for example. Note that the refrigerator 100 may have a temperature switching chamber with a variable temperature range instead of the small freezing chamber 11D.

[0016] In the present embodiment, the refrigerating chamber 11A is arranged at the uppermost part, the vegetable chamber 11B is arranged below the refrigerating chamber 11A, the ice-making chamber 11C and the small freezing chamber 11D are arranged below the vegetable chamber 11B, and the main freezing chamber 11E is arranged below the ice-making chamber 11C and the small freezing chamber 11D. However, the arrangement of the storage chambers 11 is not limited to the above example. For example, the ice-making chamber 11C and the small freezing chamber 11D may be arranged below the refrigerating chamber 11A, the vegetable chamber 11B may be arranged below the ice-making chamber 11C and the small freezing chamber 11D, and the main freezing chamber 11E may be arranged below the vegetable chamber 11B. The housing 10 has an opening on the front side of each storage chamber 11 that enables the loading and unloading of food into and out of each storage chamber 11.

[0017] The housing 10 has a first partition wall 15 and a second partition wall 16 as partition walls that partition the plurality of storage chambers 11 (see FIG. 3). Each of the first partition wall 15 and the second partition wall 16 is a partition wall along a substantially horizontal direction. The first partition wall 15 is located between the refrigerating chamber 11A and the chilled chamber 11Aa and the vegetable chamber 11B, and partitions between the refrigerating chamber 11A and the chilled chamber 11Aa and the vegetable chamber 11B. The second partition wall 16 is located between the vegetable chamber 11B and the ice-making chamber 11C and the small freezing chamber 11D, and partitions between the vegetable chamber 11B and the ice-making chamber 11C and the small freezing chamber 11D.

[0018] The plurality of storage chambers 11 are closably closed by a plurality of doors 20. The plurality of doors 20 include, for example, left and right refrigerator doors 20Aa and 20Ab, a vegetable compartment door 20B, an ice-making compartment door 20C, a small freezer door 20D, and a main freezer door 20E. The refrigerator doors 20Aa and 20Ab are disposed in front of the opening of the refrigerator compartment 11A and can close the opening of the refrigerator compartment 11A. The refrigerator doors 20Aa and 20Ab are, for example, French doors (butterfly doors). In the present embodiment, the dimensions (for example, the lateral width dimension Wb) of the right refrigerator door 20Ab are larger than the dimensions (for example, the lateral width dimension Wa) of the left refrigerator door 20Aa. Hereinafter, when the left refrigerator door 20Aa and the right refrigerator door 20Ab are not distinguished from each other, they are simply referred to as "refrigerator door 20A". In the present application, "capable of closing the opening" means capable of closing at least a part of the opening. That is, "capable of closing the opening" is not limited to being capable of closing the entire opening, and may also apply to the case where only a part of the opening can be closed.

[0019] The vegetable compartment door 20B is disposed in front of the vegetable compartment 11B and can close the opening of the vegetable compartment 11B. The ice-making compartment door 20C is disposed in front of the ice-making compartment 11C and can close the opening of the ice-making compartment 11C. The small freezer door 20D is disposed in front of the small freezer compartment 11D and closes the opening of the small freezer compartment 11D. The main freezer door 20E is disposed in front of the main freezer compartment 11E and closes the opening of the main freezer compartment 11E. Each of the vegetable compartment door 20B, the ice-making compartment door 20C, the small freezer door 20D, and the main freezer door 20E is, for example, a drawer door that can be pulled out in front of the refrigerator 100.

[0020] <2.2 Internal Structure of Refrigerator> Next, the internal structure of the refrigerator 100 will be described. FIG. 3 is a cross-sectional view taken along line F3-F3 of the refrigerator 100 shown in FIG. 2. The refrigerator 100 includes, for example, an air duct forming component 30 and a cooling unit 40.

[0021] (Air Duct Forming Component) The air passage forming component 30 includes a refrigerating air passage component 31 and a freezing air passage component 32. The refrigerating air passage component 31 is provided inside the housing 10 and extends vertically along the rear wall of the housing 10. The refrigerating air passage component 31 forms an air passage G1, which is a passage through which cold air (air) flows, near the rear wall of the housing 10.

[0022] The refrigerating air passage component 31 has cold air outlets 31a, 31b and a cold air return port 31c. The cold air outlet 31a opens into the refrigerating chamber 11A and supplies the cold air cooled by a refrigerating cooler 41 described later to the refrigerating chamber 11A. The cold air outlet 31b opens into the chilled chamber 11Aa and supplies the cold air cooled by the refrigerating cooler 41 to the chilled chamber 11Aa. The cold air return port 31c opens into the vegetable chamber 11B and guides the cold air that has passed through the refrigerating chamber 11A, the chilled chamber 11Aa, or the vegetable chamber 11B to the air passage G1.

[0023] The freezing air passage component 32 is provided inside the housing 10 and extends vertically along the rear wall of the housing 10. The freezing air passage component 32 forms an air passage G2, which is a passage through which cold air (air) flows, near the rear wall of the housing 10. The freezing air passage component 32 has a cold air outlet 32a and a cold air return port 32b. The cold air outlet 32a supplies the cold air cooled by a freezing cooler 43 described later to the ice making chamber 11C, the small freezing chamber 11D, and the main freezing chamber 11E. The cold air return port 32b opens at the lower part of the main freezing chamber 11E and guides the cold air that has passed through one or more of the ice making chamber 11C, the small freezing chamber 11D, and the main freezing chamber 11E to the air passage G2.

[0024] (Cooling section) The cooling unit 40 includes, for example, a refrigerator cooler 41, a refrigerator blower 42, a freezer cooler 43, a freezer blower 44, and a compressor 45. The refrigerator cooler 41 and the refrigerator blower 42 are arranged in the air duct G1. The refrigerator cooler 41 is supplied with the refrigerant compressed by the compressor 45 and cools the cold air flowing through the air duct G1. When the refrigerator blower 42 is driven, the cold air cooled by the refrigerator cooler 41 is supplied from the cold air outlets 31a and 31b to the refrigerator compartment 11A and the chilled compartment 11Aa. Then, the cold air warmed in the refrigerator compartment 11A, the chilled compartment 11Aa, or the vegetable compartment 11B returns to the air duct G1 from the cold air return port 31c.

[0025] The freezer cooler 43 and the freezer blower 44 are arranged in the air duct G2. The freezer cooler 43 is supplied with the refrigerant compressed by the compressor 45 and cools the cold air flowing through the air duct G2. When the freezer blower 44 is driven, the cold air cooled by the freezer cooler 43 is supplied from the cold air outlet 32a to the ice making compartment 11C, the small freezer compartment 11D, or the main freezer compartment 11E. Then, the cold air warmed in the ice making compartment 11C, the small freezer compartment 11D, or the main freezer compartment 11E returns to the air duct G2 from the cold air return port 32b.

[0026] <2.3 Operation Detection Unit and Door Opening Device> Next, the operation detection unit 50 and the door opening device 60 will be described. As shown in FIGS. 2 and 3, the refrigerator 100 includes a left door operation detection unit 50A, a right door operation detection unit 50B, a left door opening device 60A, and a right door opening device 60B.

[0027] The left door operation detection unit 50A is provided on the left refrigerator door 20Aa. The left door operation detection unit 50A can detect a predetermined operation (e.g., a touch operation) of the user U for opening the left refrigerator door 20Aa by the left door opening device 60A. On the other hand, the right door operation detection unit 50B is provided on the right refrigerator door 20Ab. The right door operation detection unit 50B can detect a predetermined operation (e.g., a touch operation) of the user U for opening the right refrigerator door 20Ab by the right door opening device 60B. Hereinafter, when the left door operation detection unit 50A and the right door operation detection unit 50B are not distinguished, they are simply referred to as the "operation detection unit 50". The operation detection unit 50 will be described in detail later.

[0028] The left door opening device 60A is a door opening device that can be operated to open the left refrigerator door 20Aa based on the control of the control unit 82 described later. The left door opening device 60A is provided, for example, on the upper wall of the housing 10 and is arranged behind the upper end of the left refrigerator door 20Aa. On the other hand, the right door opening device 60B is a door opening device that can be operated to open the right refrigerator door 20Ab based on the control of the control unit 82 described later. The right door opening device 60B is provided, for example, on the upper wall of the housing 10 and is arranged behind the upper end of the right refrigerator door 20Ab. Hereinafter, when the left door opening device 60A and the right door opening device 60B are not distinguished, they are simply referred to as the "door opening device 60". The door opening device 60 is an example of a "device capable of executing a predetermined function".

[0029] The door opening device 60 has, for example, a solenoid 61 that pushes the refrigerator door 20A forward. The solenoid 61 includes, for example, an electromagnet 61a and a plunger (movable iron core) 61b that is pushed forward by the electromagnet 61a when the electromagnet 61a is excited (see FIG. 3). The door opening device 60 can change the opening strength (opening speed of the refrigerator door 20A) of the refrigerator door 20A by changing the duty ratio of the power supplied to the electromagnet 61a by, for example, PWM (Pulse Width Modulation). Note that the door opening device 60 is not limited to a device having a solenoid 61. The door opening device 60 may be a device that can be operated to open the door 20 using an elastic body such as a spring, or a drive mechanism including gears or engaging pieces instead of the solenoid 61.

[0030] <2.4 Operation Unit> Next, the operation unit 70 will be described. As shown in FIG. 3, the refrigerator 100 includes an operation unit 70. The operation unit 70 receives setting operations of the user U related to the refrigerator 100. The operation unit 70 may be a physical operation unit including one or more buttons, switches, or dials, or may be an operation unit including a display and a touch sensor disposed on the display. The operation unit 70 is provided, for example, on the inner surface of the side wall of the housing 10. Instead of / In addition to this, the operation unit 70 may be provided on the surface of the refrigerator door 20A. In the present embodiment, the operation unit 70 can receive the setting operations of the user U for changing the setting contents related to the operation detection unit 50 and / or the door opening device 60.

[0031] <2.5 Control Device> Next, the control device 80 will be described. As shown in FIG. 3, the refrigerator 100 includes a control device 80. The control device 80 is a device that controls the refrigerator 100. The control device 80 includes, for example, a circuit board and electronic components mounted on the circuit board.

[0032] FIG. 4 is a block diagram showing the configuration related to the control device 80. The control device 80 includes, for example, an information acquisition unit 81 and a control unit 82. These functional units are realized by one or more hardware processors such as a CPU (Central Processing Unit) mounted on the refrigerator 100 executing a program. However, some or all of these functional units may be realized by hardware such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array), or may be realized by the cooperation of software and hardware.

[0033] The information acquisition unit 81 acquires various types of information from the server 200 or the terminal device 300. For example, the information acquisition unit 81 acquires a control request for controlling the refrigerator 100 from the server 200 or the terminal device 300. In the present embodiment, when the terminal device 300 receives a setting operation of the user U for changing the setting content related to the operation detection unit 50 and / or the door opening device 60, the information acquisition unit 81 acquires a setting change request for changing the above setting content from the server 200 or the terminal device 300.

[0034] The control unit 82 comprehensively controls the entire refrigerator 100. For example, the control unit 82 controls the refrigeration blower 42, the freezing blower 44, and the compressor 45 based on the detection results of various sensors described later and the control information 191 stored in the storage unit 190. Further, the control unit 82 controls the refrigerator 100 based on the control request acquired by the information acquisition unit 81. Further, the control unit 82 changes the setting content of the refrigerator 100 based on the setting change request acquired by the information acquisition unit 81. Note that the functions of the control unit 82 will be described in detail later.

[0035] <2.6 Other configurations> In addition to the above-described configuration, the refrigerator 100 includes a door opening sensor 110, a temperature sensor 120, a communication unit 130, and a storage unit 190.

[0036] (Door opening sensor) The door opening sensor 110 is a sensor capable of detecting the opening and closing of the door 20. The door opening sensor 110 includes, for example, a left refrigerator compartment door opening sensor 111A capable of detecting the opening and closing of the left refrigerator compartment door 20Aa, a right refrigerator compartment door opening sensor 111B capable of detecting the opening and closing of the right refrigerator compartment door 20Ab, a vegetable compartment door opening sensor 112 capable of detecting the opening and closing of the vegetable compartment door 20B, an ice making compartment door opening sensor 113 capable of detecting the opening and closing of the ice making compartment door 20C, a small freezer compartment door opening sensor 114 capable of detecting the opening and closing of the small freezer compartment door 20D, and a main freezer compartment door opening sensor 115 capable of detecting the opening and closing of the main freezer compartment door 20E. Hereinafter, when the left refrigerator compartment door opening sensor 111A and the right refrigerator compartment door opening sensor 111B are not distinguished, they are simply referred to as the "refrigerator compartment door opening sensor 111".

[0037] (Temperature sensor) The temperature sensor 120 is a sensor capable of detecting the temperature of the storage chamber 11. The temperature sensor 120 includes, for example, a refrigerator temperature sensor 121 capable of detecting the temperature of the refrigerator compartment 11A and a freezer temperature sensor 122 capable of detecting the temperature of the main freezer compartment 11E.

[0038] (Communication unit) The communication unit 130 is, for example, a wireless communication module connectable to the wireless router WR. The control device 80 can communicate with the server 200 or the terminal device 300 via the communication unit 130. As described above, the communication unit 130 may have a short-range wireless communication function such as Bluetooth.

[0039] (Memory unit) The memory unit 190 is realized by, for example, a combination of a RAM (Random Access Memory), a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or an SSD (Solid State Drive). The memory unit 190 stores various information. The memory unit 190 stores, for example, control information 191. The control information 191 includes information defining the contents of various control modes of the refrigerator 100, as well as set values and threshold values used for various controls.

[0040] <3. Configuration of the server> Next, the configuration of the server 200 will be described. FIG. 5 is a block diagram showing the functional configuration of server 200. Server 200 includes, for example, an information acquisition unit 210, a refrigerator management unit 220, and an information transmission unit 230. The information acquisition unit 210, the refrigerator management unit 220, and the information transmission unit 230 are realized, for example, by one or more hardware processors such as a CPU mounted on server 200 executing a program. However, some or all of these functional units may be realized by hardware such as an ASIC, a PLD, or an FPGA, or may be realized by cooperation between software and hardware. Note that these functional units may be provided separately in a plurality of server devices.

[0041] <3.1 Information Acquisition Unit> The information acquisition unit 210 acquires various information from the refrigerator 100 or the terminal device 300 by communicating with the refrigerator 100 or the terminal device 300. For example, the information acquisition unit 210 acquires information indicating the state or setting content of the refrigerator 100 from the refrigerator 100. Further, the information acquisition unit 210 acquires an instruction regarding control or change of the setting content of the refrigerator 100 from the terminal device 300.

[0042] <3.2 Refrigerator Management Unit> The refrigerator management unit 220 manages the refrigerator 100 based on the information acquired by the information acquisition unit 210. For example, the refrigerator management unit 220 generates a control command regarding control or change of the setting content of the refrigerator 100 based on the information acquired from the terminal device 300 by the information acquisition unit 210.

[0043] <3.3 Information Transmission Unit> The information transmission unit 230 transmits the information acquired from the refrigerator 100 by the information acquisition unit 210 to the terminal device 300. Further, the information transmission unit 230 transmits the control command generated by the refrigerator management unit 220 to the refrigerator 100.

[0044] <4. Terminal Device> Next, the terminal device 300 will be described. FIG. 6 is a block diagram showing the functional configuration of the terminal device 300. The terminal device 300 includes, for example, an information acquisition unit 310, a display control unit 320, an operation reception unit 330, an information transmission unit 340, and a storage unit 390. The information acquisition unit 310, the display control unit 320, the operation reception unit 330, and the information transmission unit 340 are realized by one or more hardware processors such as a CPU mounted on the terminal device 300 executing an application program P. In other words, the information acquisition unit 310, the display control unit 320, the operation reception unit 330, and the information transmission unit 340 are software functional units included in the home appliance management application AP.

[0045] <4.1 Information Acquisition Unit> The information acquisition unit 310 acquires various information from the refrigerator 100 or the server 200 by communicating with the refrigerator 100 or the server 200.

[0046] <4.2 Display Control Unit> The display control unit 320 controls the content displayed on the display screen 301a of the display device 301 by controlling the display device 301 of the terminal device 300. The content displayed on the display screen 301a described below is displayed under the control of the display control unit 320. For example, the display control unit 320 causes the display screen 301a to display a setting screen for receiving a setting operation of the user U for changing the setting content related to the operation detection unit 50 and / or the door opening device 60.

[0047] <4.3 Operation Reception Unit> The operation reception unit 330 receives the operation of the user U performed on the input device 302 in relation to the screen (for example, the setting screen described later) displayed by the display control unit 320. For example, the operation reception unit 330 receives the operation of the user U pressing (for example, tapping) various operation units displayed on the above screen.

[0048] <4.4 Information Transmission Unit> When the operation reception unit 330 receives the operation of the user U, the information transmission unit 340 generates information corresponding to the received operation. Then, the information transmission unit 340 transmits the generated information to the refrigerator 100 or the server 200.

[0049] <4.5 Memory unit> The memory unit 390 is realized by a combination of, for example, RAM, ROM, EEPROM, or SSD. The memory unit 390 stores various information. For example, the memory unit 390 stores the application program P.

[0050] <5. Configuration of the operation detection unit of the refrigerator> Next, the operation detection unit 50 of the refrigerator 100 will be described in detail. FIG. 7 is a front view showing the operation detection unit 50 of the refrigerator 100. The operation detection unit 50 includes, for example, a capacitive sensor provided inside the refrigerator door 20A. The operation detection unit 50 can detect a touch operation (contact operation) of the user U on the surface of the refrigerator door 20A and / or a proximity operation of the user U on the surface of the refrigerator door 20A.

[0051] In the present embodiment, the operation detection unit 50 includes a central detection area 51, an intermediate detection area 52, a peripheral detection area 53, a light emitting unit 54, a sensor control unit 55 (see FIG. 8), and a memory unit 56 (see FIG. 8). Each of the central detection area 51, the intermediate detection area 52, and the peripheral detection area 53 is an independent planar capacitive sensor (pad-type capacitive sensor). Note that the names "central detection area", "intermediate detection area", and "peripheral detection area" are for convenience of explanation and do not limit the shape, position, or function of each detection area.

[0052] (Central detection area) The central detection area 51 is provided, for example, at the center of the operation detection unit 50 when the refrigerator 100 is viewed from the front. The central detection area 51 is, for example, an elongated rectangular detection area extending in the vertical direction.

[0053] (Intermediate detection area) When the refrigerator 100 is viewed from the front, for example, the intermediate detection area 52 is arranged around the central detection area 51. The intermediate detection area 52 is arranged between the central detection area 51 and the peripheral detection area 53.

[0054] In this embodiment, the intermediate detection area 52 includes a first portion 52a, a second portion 52b, and a third portion 52c. The first portion 52a is arranged on the left side of the central detection area 51. The first portion 52a extends in the vertical direction along the left end of the central detection area 51. The second portion 52b is arranged on the right side of the central detection area 51. The second portion 52b extends in the vertical direction along the right end of the central detection area 51. The third portion 52c is arranged above the central detection area 51. The third portion 52c extends in the horizontal direction along the upper end of the central detection area 51. The third portion 52c connects the upper end of the first portion 52a and the upper end of the second portion 52b.

[0055] (Peripheral detection area) When the refrigerator 100 is viewed from the front, for example, the peripheral detection area 53 is arranged around the intermediate detection area 52. The peripheral detection area 53 is arranged on the outermost peripheral side among the three detection areas (the central detection area 51, the intermediate detection area 52, and the peripheral detection area 53).

[0056] In this embodiment, the peripheral detection area 53 includes a first portion 53a, a second portion 53b, a third portion 53c, and a fourth portion 53d. The first portion 53a is disposed on the left side of the first portion 52a of the intermediate detection area 52. The first portion 53a extends in the vertical direction along the first portion 52a of the intermediate detection area 52. The second portion 53b is disposed on the right side of the second portion 52b of the intermediate detection area 52. The second portion 53b extends in the vertical direction along the second portion 52b of the intermediate detection area 52. The third portion 53c is disposed above the third portion 52c of the intermediate detection area 52. The third portion 53c extends in the horizontal direction along the third portion 52c of the intermediate detection area 52. The third portion 53c connects the upper end portion of the first portion 53a and the upper end portion of the second portion 53b. The fourth portion 53d is disposed below the central detection area 51. The fourth portion 52d extends in the horizontal direction. The fourth portion 53d connects the lower end portion of the first portion 53a and the lower end portion of the second portion 53b.

[0057] (Function assignment for each detection area) In this embodiment, in the basic setting (initial setting) of the refrigerator 100, the following functions are assigned to the central detection area 51, the intermediate detection area 52, and the peripheral detection area 53.

[0058] The function of the touch detection area R1 for detecting a touch operation (contact operation) of the user U on the surface of the refrigerator door 20A is assigned to the central detection area 51. The function of the touch detection area R1 is, for example, the function as a door opening switch. The touch detection area R1 transmits a predetermined signal (for example, "door opening notification" described later) to the control unit 82 when a change in the detected physical quantity (for example, a change in capacitance) satisfies a predetermined condition for touch detection. In this embodiment, the touch detection area R1 is set such that when the user U performs a touch operation (contact operation) on the surface of the refrigerator door 20A overlapping the touch detection area R1, the detected value of the capacitance exceeds a threshold value (ON state is detected). The touch operation of the user U on the surface of the refrigerator door 20A is an example of each of "a predetermined operation of the user" and "a predetermined action of the user".

[0059] In addition, by reducing the capacitance threshold corresponding to the touch ON threshold Th1 described above, it is also possible to accept an operation of the user U for performing an opening operation by a proximity operation (an operation to enter a proximity state) of the user U with respect to the refrigerator door 20A without a touch operation. In this case, the proximity operation of the user U with respect to the surface of the refrigerator door 20A corresponds to an example of "a predetermined operation of the user". In other words, in the content of the present embodiment described below, "a predetermined operation of the user" or "a touch operation" may be appropriately read as "a proximity operation".

[0060] The intermediate detection region 52 is assigned the function of the proximity detection region R2 that detects the proximity state of the user U with respect to the surface of the refrigerator door 20A. In the present application, the "proximity state" is, for example, a state of holding a hand. In the present application, the "proximity state" is, for example, a case where a part of the body of the user U exists within 10 cm with respect to the surface of the refrigerator door 20A, but the specific distance is not limited to the above example. The proximity detection region R2 transmits a predetermined signal (for example, "proximity notification" described later) to the control unit 82 when a change in the detected physical quantity (for example, a change in capacitance) satisfies a predetermined condition for proximity detection. In the present embodiment, the proximity detection region R2 is set such that the detected capacitance value exceeds the threshold value (an ON state is detected) when the user U is in a proximity state with respect to the surface of the refrigerator door 20A that overlaps with the proximity detection region R2.

[0061] In the present embodiment, by arranging the proximity detection region R2 around the touch detection region R1, a state in which it is easier to detect the proximity state of the user U is realized. In addition, the proximity detection region R2 is adjusted to be more sensitive than, for example, the touch detection region R1. Instead of / In addition to this, the proximity detection region R2 (intermediate detection region 52) may be arranged closer to the surface of the refrigerator door 20A than the touch detection region R1 (central detection region 51) so that it is easier to detect the proximity state of the user U.

[0062] In this embodiment, in the basic settings (initial settings) of the refrigerator 100, the contact operations of the user U with respect to the surface of the refrigerator door 20A are detected by the central detection area 51 and the peripheral detection area 53, respectively. That is, the intermediate detection area 52 is not used for detecting the contact operation of the user U with respect to the surface of the refrigerator door 20A. From one perspective, the intermediate detection area 52 functions as a buffer zone between the central detection area 51 (touch detection area R1) and the peripheral detection area 53 (protection detection area R3 described later).

[0063] The function of the protection detection area R3 for detecting an unintended contact operation of the user U with respect to the surface of the refrigerator door 20A is assigned to the peripheral detection area 53. The function of the protection detection area R3 is, for example, a function of suppressing an unintended door opening operation. When the change in the detected physical quantity (for example, the change in capacitance) of the protection detection area R3 satisfies a predetermined protection condition, the protection detection area R3 transmits a predetermined signal (for example, "protection notification" described later) to the control unit 82. The capacitance threshold value of the protection detection area R3 is set so that when the user U performs a contact operation on the surface of the refrigerator door 20A that overlaps with the protection detection area R3, the detected capacitance value exceeds the threshold value (the ON state is detected).

[0064] In this embodiment, by arranging the protection detection area R3 around the touch detection area R1, operations of the user U that are different in purpose from the touch operation (for example, operations of leaning the body against the refrigerator door 20A or touching it with the hand) are detected. For example, the protection detection area R3 is adjusted to be less sensitive than the touch detection area R1, for example. Instead of / In addition to this, the protection detection area R3 (peripheral detection area 53) may be arranged deeper inside the refrigerator door 20A than the touch detection area R1 (central detection area 51), and may be less likely to detect the contact operation of the user U than the touch detection area R1.

[0065] (Light emitting unit) The plurality of light emitting units 54 are arranged between the central detection region 51 and the intermediate detection region 52. For example, a plurality of openings 50h are provided between the central detection region 51 and the intermediate detection region 52. The plurality of openings 50h are arranged side by side along the outer edge of the central detection region 51 so as to surround the central detection region 51. The plurality of light emitting units 54 are arranged in a one-to-one correspondence with the plurality of openings 50h. That is, the plurality of light emitting units 54 are arranged side by side along the outer edge of the central detection region 51 so as to surround the central detection region 51. Each light emitting unit 54 can emit light forward of the refrigerator door 20A through the opening 50h. When the plurality of light emitting units 54 emit light, it becomes easier for the user U to recognize the position of the central detection region 51.

[0066] (Sensor control unit) Next, the sensor control unit 55 will be described. FIG. 8 is a block diagram showing a functional configuration related to the operation detection unit 50. The sensor control unit 55 controls the detection content and detection state of the touch detection region R1, the proximity detection region R2, and the protection detection region R3. Further, the sensor control unit 55 controls the light emission state of the light emitting unit 54. Note that part or all of the functions of the sensor control unit 55 described below may be provided in the control unit 82 instead of the operation detection unit 50.

[0067] (Detection process using the touch detection region) FIG. 9 is a diagram for explaining the detection process using the touch detection region R1. FIG. 9 shows the change in capacitance detected by the touch detection region R1 during a series of operations in which the contact area between the user U and the refrigerator door 20A gradually increases as a part of the user U's body (for example, a finger) touches the touch detection region R1, and then the contact area between the user U and the refrigerator door 20A gradually decreases as a part of the user U's body (for example, a finger) leaves the touch detection region R1.

[0068] In this embodiment, the sensor control unit 55 detects the touch operation of the user U using two threshold values (touch ON threshold value Th1 and touch OFF threshold value Th2). These two threshold values are an example of threshold values of a physical quantity (e.g., capacitance) for detecting a predetermined operation (e.g., touch operation) of the user U.

[0069] The sensor control unit 55 determines that a transition to the touch ON state has occurred when the capacitance detected by the touch detection area R1 increases and the detected value of the capacitance exceeds the touch ON threshold value Th1 (time t11). In this case, the sensor control unit 55 starts counting the touch ON time T1. The touch ON time T1 is the time during which the touch ON state is continuously detected by the touch detection area R1, and is an example of "the time during which a predetermined operation of the user U is detected". The touch ON threshold value Th1 is adjusted, for example, to be the capacitance at the time when a part (e.g., finger) of the body of the user U performing the touch operation sufficiently contacts the surface of the refrigerator door 20A. The touch ON threshold value Th1 is set to a high value having a sufficient difference from the touch OFF threshold value Th2, for example.

[0070] Thereafter, the sensor control unit 55 determines that a transition to the touch OFF state has occurred when the capacitance detected by the touch detection area R1 decreases and the detected value of the capacitance falls below the touch OFF threshold value Th2 (time t12). In this case, the sensor control unit 55 stops counting the touch ON time T1. The touch OFF threshold value Th2 is adjusted, for example, to be the capacitance immediately before a part (e.g., finger) of the body of the user U performing the touch operation leaves the refrigerator door 20A.

[0071] In this embodiment, the sensor control unit 55 determines whether the touch ON time T1 (i.e., time t12 - time t11) exceeds the minimum touch ON time Tm1. When the touch ON time T1 exceeds the minimum touch ON time Tm1, the sensor control unit 55 determines that a predetermined operation (e.g., a touch operation) of the user U has been performed on the premise that the detected change in capacitance satisfies the predetermined conditions for touch detection. In this case, the sensor control unit 55 outputs a predetermined signal (hereinafter referred to as "door opening notification") for operating the door opening device 60 to the control unit 82.

[0072] On the other hand, when the touch ON time T1 is less than or equal to the minimum touch ON time Tm1, the sensor control unit 55 determines that no predetermined operation (e.g., a touch operation) of the user U has been performed. In this case, the sensor control unit 55 does not output a door opening notification.

[0073] In the example described above, the touch OFF threshold Th2 is set to a value lower than the touch ON threshold Th1. However, the touch OFF threshold Th2 may be the same as the touch ON threshold Th1, or may be set to a value higher than the touch ON threshold Th1. The touch ON threshold Th1, the touch OFF threshold Th2, and the minimum touch ON time Tm1 are stored in the storage unit 56, for example, as part of the threshold setting information 56a. The minimum touch ON time Tm1 is an example of a "threshold time".

[0074] (Detection process by proximity detection area) FIG. 10 is a diagram for comparing the detection process using the touch detection area R1, the detection process using the proximity detection area R2, and the detection process using the protection detection area R3. In this embodiment, the sensor control unit 55 detects the proximity state of the user U using two thresholds (proximity ON threshold Th3 and proximity OFF threshold Th4) related to the proximity detection area R2. The two thresholds are an example of thresholds for a physical quantity (e.g., capacitance) for detecting the proximity state of the user U.

[0075] When the capacitance detected by the proximity detection area R2 increases and the detected value of the capacitance exceeds the proximity ON threshold Th3 (time t21), the sensor control unit 55 determines that the state has transitioned to the proximity ON state. In this case, the sensor control unit 55 starts outputting a predetermined signal (hereinafter referred to as "proximity notification") indicating that the user U is in the proximity state to the control unit 82. Further, when the sensor control unit 55 determines that the state has transitioned to the proximity ON state, it causes the light emitting unit 54 to emit light to inform the user U of the position of the touch detection area R1. Thereafter, when the capacitance detected by the proximity detection area R2 decreases and the detected value of the capacitance falls below the proximity OFF threshold Th4 (time t22), the sensor control unit 55 determines that the state has transitioned to the proximity OFF state. In this case, the sensor control unit 55 stops outputting the proximity notification. Further, when the sensor control unit 55 determines that the state has transitioned to the proximity OFF state, it stops the light emission of the light emitting unit 54. Hereinafter, for convenience of explanation, the "proximity ON state" may be simply referred to as the "proximity state".

[0076] Note that the proximity ON threshold Th3 and the proximity OFF threshold Th4 may be the same or different. The proximity ON threshold Th3 and the proximity OFF threshold Th4 are stored in the storage unit 56, for example, as part of the threshold setting information 56a.

[0077] (Detection process by the protection detection area) In the present embodiment, the sensor control unit 55 detects a specific operation of the user U using two thresholds (protection ON threshold Th5 and protection OFF threshold Th6) related to the protection detection area R3. The specific operation is, for example, an operation in which the user U does not have a specific intention (for example, does not have an intention to operate the door opening device 60) and the user U touches the refrigerator door 20A. The specific operation is an operation such as leaning on the refrigerator 100 or touching with a hand. The two thresholds are an example of thresholds of a physical quantity (for example, capacitance) for detecting a specific operation of the user U.

[0078] When the capacitance detected by the protection detection area R3 increases and the detected value of the capacitance exceeds the protection ON threshold Th5 (time t31), the sensor control unit 55 determines that a transition has occurred to the protection ON state. In this case, the sensor control unit 55 starts outputting a predetermined signal (hereinafter referred to as "protection notification") for suppressing the door opening operation to the control unit 82. Thereafter, when the capacitance detected by the protection detection area R3 decreases and the detected value of the capacitance falls below the protection OFF threshold Th6 (time t32), the sensor control unit 55 determines that a transition has occurred to the protection OFF state. In this case, the sensor control unit 55 stops the output of the protection notification.

[0079] Note that the protection ON threshold Th5 and the protection OFF threshold Th6 may be the same or different. The protection ON threshold Th5 and the protection OFF threshold Th6 are stored in the storage unit 56, for example, as part of the threshold setting information 56a.

[0080] (Storage unit) The storage unit 56 is realized by a rewritable memory such as a RAM or an EEPROM, for example. The storage unit 56 stores, for example, the threshold setting information 56a and the area setting information 56b described later.

[0081] <6. Control Example of Door Opening Operation> <6.1 Basic Control> Based on the detection result of the operation detection unit 50, the control unit 82 controls the door opening device 60. For example, when the control unit 82 receives a door opening notification from the operation detection unit 50, the control unit 82 operates the door opening device 60 and executes an operation to open the refrigerator door 20A by the door opening device 60. In the present embodiment, when the control unit 82 receives a door opening notification from the left door operation detection unit 50A, the control unit 82 operates the left door opening device 60A and executes an operation to open the left refrigerator door 20Aa. On the other hand, when the control unit 82 receives a door opening notification from the right door operation detection unit 50B, the control unit 82 operates the right door opening device 60B and executes an operation to open the right refrigerator door 20Ab.

[0082] <6.2 Flow of Basic Control> FIG. 11 is a flowchart showing the basic control flow of the door opening operation. First, the control unit 82 determines whether or not it has received a door opening notification (S101). If it has not received a door opening notification (S101: NO), the control unit 82 returns to the process of S101 and continues monitoring.

[0083] On the other hand, if it has received a door opening notification (S101: YES), the control unit 82 determines whether or not it has received a protection notification (S102). If it has received a protection notification (S102: YES), the control unit 82 does not operate the door opening device 60. In this case, the control unit 82 returns to the process of S101 and continues monitoring.

[0084] On the other hand, if it has not received a protection notification (S102: NO), the control unit 82 operates the door opening device 60 and executes an operation to open the refrigerator door 20A (S103). Specifically, the control unit 82 determines whether or not the refrigerator door 20A is in a closed state based on the detection result of the refrigerator door opening sensor 111. When the refrigerator door 20A is in a closed state, the control unit 82 supplies power to the door opening device 60 and executes an operation to open the refrigerator door 20A by the solenoid 61.

[0085] Note that when the control unit 82 receives a proximity notification from the sensor control unit 55, it may enable a user interface such as an operation panel or a voice dialogue function, or perform controls such as noise countermeasures, optimization of cooling control, sterilization processing, or safety countermeasures. Noise countermeasures are, for example, controls that reduce the driving amount of the refrigerator blower 42, the freezer blower 44, or the compressor 45. Safety countermeasures are, for example, controls that stop the ultraviolet irradiation of the ultraviolet light emitting unit for the refrigerator compartment 11A.

[0086] <7. Change of Minimum Touch ON Time and Touch ON Threshold> Next, the changes to the minimum touch ON time Tm1 and the touch ON threshold Th1 will be described. In the present embodiment, based on the setting operation of the user U, the minimum touch ON time Tm1 and / or the touch ON threshold Th1 can be changed. In the present application, the "setting operation of the user U" is, for example, the operation of the user U obtained through the operation unit 70 provided in the refrigerator 100. Instead of / In addition to this, the "setting operation of the user U" may be the operation of the user U obtained through the terminal device 300.

[0087] <7.1 Change of the minimum touch ON time> In the present embodiment, the control unit 82 can change the minimum touch ON time Tm1. For example, based on the setting operation of the user U, the control unit 82 changes the content of the threshold setting information 56a stored in the storage unit 56 of the operation detection unit 50, thereby changing the minimum touch ON time Tm1. When the minimum touch ON time Tm1 is shortened, the touch operation of the user U can be detected with a short operation time (for example, a short contact time), so the operability is improved, but the possibility of false detection increases. On the other hand, when the minimum touch ON time Tm1 is lengthened, although the operability may decrease, false detection is less likely to occur. In the present embodiment, the user U can change the minimum touch ON time Tm1 according to his / her own preferences or the family situation.

[0088] FIG. 12 is a diagram showing an example of the change table TA1 of the minimum touch ON time Tm1. In the present embodiment, as one aspect of changing the minimum touch ON time Tm1, the control unit 82 can selectively set the sensitivity level applied to the operation detection unit 50 from a plurality of levels (for example, five levels). In the present application, the "sensitivity level" means the ease of detecting the operation of the user U. The higher the sensitivity level, the easier it is to detect the operation of the user U.

[0089] In this embodiment, the control unit 82 accepts the selection (change of the sensitivity level) of the sensitivity level to be applied based on the setting operation of the user U. The control unit 82 sets the length of the minimum touch ON time Tm1 based on the selected sensitivity level. For example, the higher the sensitivity level selected by the control unit 82, the shorter the minimum touch ON time Tm1 is set.

[0090] In a specific example, the above-described change table TA1 is stored in the storage unit 190 as a part of the control information 191. The control unit 82 acquires the length of the minimum touch ON time Tm1 corresponding to the sensitivity level selected by the user U based on the change table TA1. The control unit 82 changes the content registered in the threshold setting information 56a of the operation detection unit 50 using the information indicating the length of the acquired minimum touch ON time Tm1. Thereby, the sensor control unit 55 makes a determination regarding the output of the door opening notification based on the changed minimum touch ON time Tm1.

[0091] <7.2 Change of Touch ON Threshold> In this embodiment, the control unit 82 can change the touch ON threshold Th1. For example, the control unit 82 changes the touch ON threshold Th1 by changing the content of the threshold setting information 56a stored in the storage unit 56 of the operation detection unit 50 based on the setting operation of the user U. When the touch ON threshold Th1 is lowered, touch operations are more likely to be detected even in operations in a dry season such as winter or operations of a user U with a low moisture content in the hand such as an elderly person, but the possibility of false detection increases. On the other hand, when the touch ON threshold Th1 is set high, operations in a specific season or of a specific user U may be less likely to be detected, but false detection is less likely to occur. In this embodiment, the user U can change the touch ON threshold Th1 according to their preference or the family situation.

[0092] In this embodiment, the control unit 82 can execute a "normal mode" and an "ON threshold reduction mode". The ON threshold reduction mode is a mode in which the touch ON threshold Th1 is reduced by a predetermined amount compared to the normal mode. For example, the ON threshold reduction mode is a mode in which the difference between the touch ON threshold Th1 and the touch OFF threshold Th2 is half that of the normal mode. The control unit 82 receives a selection between the normal mode and the ON threshold reduction mode based on, for example, a setting operation of the user U. Alternatively / In addition, the control unit 82 may switch between the normal mode and the ON threshold reduction mode based on information indicating the season acquired from the outside (e.g., the server 200) and / or information indicating the attributes of the user U. The normal mode is an example of the "first mode". The ON threshold reduction mode is an example of the "second mode".

[0093] <7.3 Change in minimum touch ON time according to change in touch ON threshold> In this embodiment, when the control unit 82 changes the touch ON threshold Th1, it changes the minimum touch ON time Tm1 according to the change in the touch ON threshold Th1. For example, when the control unit 82 changes the touch ON threshold Th1 to be reduced, it changes the minimum touch ON time Tm1 to be longer. Note that "when the touch ON threshold Th1 is changed" means, for example, when a setting operation of the user U for switching between the "normal mode" and the "ON threshold reduction mode" is performed.

[0094] In this embodiment, when a setting operation of the user U for reducing the touch ON threshold Th1 (for example, a setting operation of the user U for changing the "normal mode" to the "ON threshold reduction mode") is received, the control unit 82 reduces the touch ON threshold Th1 and changes the minimum ON time Tm1 to be longer. On the other hand, when a setting operation of the user U for increasing the touch ON threshold Th1 (for example, a setting operation of the user U for changing the "ON threshold reduction mode" to the "normal mode") is received, the control unit 82 increases the touch ON threshold Th1 and changes the minimum ON time Tm1 to be shorter.

[0095] FIG. 13 is a diagram for explaining the case of changing the touch ON threshold Th1. FIG. 13 shows the change of the touch ON threshold Th1 when, for example, "sensitivity level 4" is set. When the control unit 82 receives a setting operation of the user U to lower the touch ON threshold Th1, the control unit 82 lowers the touch ON threshold Th1 and changes it so as to increase the minimum touch ON time Tm1.

[0096] FIG. 14 is another diagram for explaining the case of changing the touch ON threshold Th1. FIG. 14 shows the change of the touch ON threshold Th1 when, for example, "sensitivity level 2" is set. When the control unit 82 receives a setting operation of the user U to lower the touch ON threshold Th1, the control unit 82 lowers the touch ON threshold Th1 and changes it so as to increase the minimum touch ON time Tm1.

[0097] (Specific first example) Here, in one example, in the five-level sensitivity level, the value of the touch ON threshold Th1 is the same. And the operation detection unit 50 can be set to at least a first mode and a second mode. In the first mode (for example, "sensitivity level 4" in the normal mode), the first threshold time (for example, 200 ms) is applied as the minimum touch ON time Tm1. In the second mode (for example, "sensitivity level 2" in the normal mode), a second threshold time (for example, 700 ms) longer than the first threshold time is applied as the minimum touch ON time Tm1.

[0098] In the above example, when the control unit 82 changes to lower the threshold of the physical quantity by the same degree (for example, when changing from the "normal mode" to the "ON threshold lowering mode"), in the first mode (sensitivity level 4), the first threshold time is changed to be longer at the first degree (for example, 200 ms → 400 ms), and in the second mode (sensitivity level 2), the second threshold time is changed to be longer at a second degree smaller than the first degree (700 ms → 800 ms).

[0099] (Specific second example) In another example, in the five - level sensitivity level, the lower the sensitivity level (for example, the longer the minimum touch - ON time Tm1), the lower the value of the touch - ON threshold Th1 is set. And the operation detection unit 50 can be set to at least a first mode and a second mode. In the first mode (for example, "sensitivity level 4" in the normal mode), a first threshold (for example, the touch - ON threshold Th1 in "sensitivity level 4" of the normal mode) is applied as the touch - ON threshold Th1, and a first threshold time (for example, 200 ms) is applied as the threshold time (minimum touch - ON time Tm1). In the second mode (for example, "sensitivity level 2" in the normal mode), a second threshold lower than the first threshold (for example, the touch - ON threshold Th1 in "sensitivity level 2" of the normal mode) is applied as the touch - ON threshold Th1, and a second threshold time longer than the first threshold time (for example, 700 ms) is applied as the threshold time.

[0100] In the above example, when the control unit 82 changes to lower the threshold of the physical quantity at the same degree (for example, when changing from the "normal mode" to the "ON - threshold - decrease mode"), in the first mode (sensitivity level 4), the first threshold time is changed to be longer at a first degree (for example, 200 ms → 400 ms), and in the second mode (sensitivity level 2), the second threshold time is changed to be longer at a second degree smaller than the first degree (700 ms → 800 ms).

[0101] <8. Changes in function assignment for each detection area> Next, the change in function assignment for each detection area of the operation detection unit 50 will be described.

[0102] <8.1 Changes in function assignment based on user's setting operation> In this embodiment, the control unit 82 can change the function assignment for a plurality of detection regions (for example, the central detection region 51, the intermediate detection region 52, and the peripheral detection region 53) of the operation detection unit 50 for each region. For example, the control unit 82 can change the function assignment for each detection region of the operation detection unit 50 based on a setting operation of the user U. For example, in the region setting information 56b stored in the storage unit 56, combinations of the correspondence between each detection region and the function assigned to each detection region are registered. The control unit 82 can change the function assignment for each detection region, for example, by changing the content of the region setting information 56b based on a setting operation of the user U.

[0103] In this embodiment, the control unit 82 can change a region (for example, the region where the touch detection region R1 functions) that is used as a region capable of detecting a predetermined operation of the user U among a plurality of detection regions (for example, the central detection region 51, the intermediate detection region 52, and the peripheral detection region 53) of the operation detection unit 50. For example, instead of assigning the function of the touch detection region R1 only to the central detection region 51, the control unit 82 can assign the function of the touch detection region R1 to the intermediate detection region 52 or the peripheral detection region 53 in addition to the central detection region 51.

[0104] FIG. 15 is a diagram for explaining the change of the function assignment for the detection region. For example, as a change in the content of the region setting information 56b, the control unit 82 changes the correspondence between the condition used for determining the detected value of the capacitance and the type of notification (for example, door opening notification, proximity notification, or protection notification) output according to the determination result. For example, when the peripheral detection region 53 is registered in the region setting information 56b as the protection detection region R3, the sensor control unit 55 starts outputting a protection notification when a capacitance exceeding the protection ON threshold Th5 is detected. On the other hand, when the peripheral detection region 53 is registered in the region setting information 56b as the touch detection region R1, the sensor control unit 55 outputs a door opening notification when a capacitance exceeding the touch ON threshold Th1 continues to be detected for a minimum touch ON time Tm1.

[0105] Note that the ON threshold value / OFF threshold value set corresponding to the same type of detection area (touch detection area R1, proximity detection area R2, or protection detection area R3) may be the same or different in a plurality of detection areas (for example, the central detection area 51, the intermediate detection area 52, and the peripheral detection area 53) of the operation detection unit 50. For example, the touch ON threshold value Th1 set for the central detection area 51, the touch ON threshold value Th1 set for the intermediate detection area 52, and the touch ON threshold value Th1 set for the peripheral detection area 53 may be the same or different.

[0106] In the present embodiment, the control unit 82 can change the number of detection areas used as areas where a predetermined operation (for example, a touch operation) of the user U can be detected in a plurality of detection areas of the operation detection unit 50. In other words, the control unit 82 can change the size of the area where a predetermined operation (for example, a touch operation) of the user U can be detected in the operation detection unit 50.

[0107] For example, the plurality of detection areas of the operation detection unit 50 include a first detection area and a second detection area. The control unit 82 can change the state of the operation detection unit 50 at least between a first detection state and a second detection state. In the first detection state, the first detection area is used as an area where a predetermined operation (for example, a touch operation) of the user U can be detected, and the second detection area is used as an area where content different from the predetermined operation (for example, a touch operation) can be detected. In the second detection state, the first detection area and the second detection area are used as areas where the predetermined operation (for example, a touch operation) can be detected. The central detection area 51 is an example of the "first detection area". The intermediate detection area 52 or the peripheral detection area 53 is an example of the "second detection area".

[0108] The "content different from the predetermined operation" detected by the second detection area is, for example, the proximity state of the user U to the refrigerator door 20A. The "content different from the predetermined operation" detected by the second detection area is, for example, at least content related to the distance between a part of the user U's body and the refrigerator door 20A that is different from the predetermined operation.

[0109] In a specific example, in the first detection state, the function of the touch detection area R1 is assigned to the central detection area 51, the function of the proximity detection area R2 is assigned to the intermediate detection area 52, and the function of the protection detection area R3 is assigned to the peripheral detection area 53. On the other hand, in the second detection state, the function of the touch detection area R1 is assigned to the central detection area 51 and the intermediate detection area 52, and the function of the protection detection area R3 is assigned to the peripheral detection area 53.

[0110] Note that the "content different from the predetermined operation" detected by the second detection area is not limited to the above example, and may also be a specific operation of the user U who does not intend to operate the door opening device 60 (such as an operation of leaning against the refrigerator 100 or an operation of touching with the hand).

[0111] In a specific example, in the first detection state, the function of the touch detection area R1 is assigned to the central detection area 51, the function of the proximity detection area R2 is assigned to the intermediate detection area 52, and the function of the protection detection area R3 is assigned to the peripheral detection area 53. On the other hand, in the second detection state, the function of the touch detection area R1 is assigned to the central detection area 51 and the peripheral detection area 53, and the function of the proximity detection area R2 is assigned to the intermediate detection area 52.

[0112] In this embodiment, a reception function (for example, a function for outputting a door opening notification) for the door opening device 60 to execute a predetermined function (for example, an operation of opening the door 20) when detecting the predetermined operation (for example, a touch operation) can be assigned to the first detection area. On the other hand, a suppression function (for example, a function for outputting a protection notification) for suppressing the execution of the predetermined function (for example, an operation of opening the refrigerator door 20A) by the control unit 82 based on the detection result of the second detection area can be selectively assigned to the second detection area in addition to the reception function.

[0113] In this embodiment, when the reception function is assigned, the second detection area is set to a state in which it is more difficult to detect the predetermined operation (for example, a touch operation) than the first detection area. "More difficult to detect the predetermined operation" means, for example, a state in which the touch ON threshold Th1 set for the second detection area is larger than the touch ON threshold Th1 set for the first detection area, and / or a state in which the minimum touch ON time Tm1 set for the second detection area is longer than the minimum touch ON time Tm1 set for the first detection area.

[0114] Note that, instead of the above example, the second detection area may be arranged on the back side inside the refrigerator door 20A (a position away from the surface of the refrigerator door 20A) compared to the first detection area, so that it is more difficult to detect the predetermined operation than the first detection area. For example, when the second detection area is arranged on the back side inside the refrigerator door 20A (a position away from the surface of the refrigerator door 20A) compared to the first detection area, even if the ON thresholds of both detection areas are the same, since the second detection area is at a position far from the hand of the user U, the detected value of the capacitance becomes smaller than that of the first detection area, and it becomes a state in which it is more difficult to detect the predetermined operation than the first detection area.

[0115] In this embodiment, when the suppression function is assigned, the second detection area is set to a state in which it is easier to detect the predetermined operation than when the reception function is assigned. The reception function is, for example, the function of the touch detection area R1. The suppression function is, for example, the function of the protection detection area R3. "Easier to detect the predetermined operation" means, for example, a state in which the protection ON threshold Th5 is smaller than the touch ON threshold Th1, and / or a state in which the minimum ON time (minimum touch ON time Tm1) related to the touch detection area R1 is shorter than the minimum ON time (for example, 0 seconds) related to the protection detection area R3.

[0116] Incidentally, instead of the above example, the second detection area may be set in a state where the predetermined operation can be detected more easily when the suppression function is assigned than when the reception function is assigned by having a drive mechanism that can be displaced in the front-rear direction inside the refrigerator door 20A. For example, when the suppression function is assigned, the second detection area may be moved to the front side (a position close to the surface of the refrigerator door 20A) inside the refrigerator door 20A by the drive mechanism, so that the predetermined operation can be detected more easily than when the reception function is assigned.

[0117] (First Example of Function Assignment Change) FIG. 16 is a diagram showing an example of a function assignment change table TA2 for a detection area. In the example shown in FIG. 16, as one aspect of changing the function assignment of the detection area, the control unit 82 can selectively set a plurality (for example, three) of setting modes to the operation detection unit 50. In the present application, the "setting mode" means a combination of functions assigned to a plurality of detection areas (for example, the central detection area 51, the intermediate detection area 52, and the peripheral detection area 53). Here, for convenience of explanation, the setting mode may be referred to as the "area level".

[0118] The change table TA2 is stored in the storage unit 190, for example, as a part of the control information 191. Based on the change table TA2, the control unit 82 acquires the function assignment of each detection area corresponding to the setting mode selected by the user U. The control unit 82 changes the content registered in the area setting information 56b of the operation detection unit 50 using the information indicating the function assignment of each acquired detection area. Thereby, the sensor control unit 55 can output various notifications based on the changed function assignment.

[0119] As shown in FIG. 16, in the first setting mode (area level 1), the function of the touch detection area R1 is assigned to the central detection area 51, the function of the proximity detection area R2 is assigned to the intermediate detection area 52, and the function of the protection detection area R3 is assigned to the peripheral detection area 53. In the second setting mode (area level 2), the function of the touch detection area R1 is assigned to the central detection area 51, the function of the proximity detection area R2 is assigned to the intermediate detection area 52, and the peripheral detection area 53 is set to an invalid state. The "invalid state" means that it is not used as a detection area and none of the functions of the touch detection area R1, the proximity detection area R2, and the protection detection area R3 are assigned. In the third setting mode (area level 3), the function of the touch detection area R1 is assigned to the central detection area 51, the function of the proximity detection area R2 is assigned to the intermediate detection area 52, and the function of the touch detection area R1 is assigned to the peripheral detection area 53.

[0120] (Second Example of Function Assignment Change) FIG. 17 is a diagram showing another example of the function assignment change table TA2 of the detection area. In the example shown in FIG. 17, as another aspect of changing the function assignment of the detection area, the control unit 82 can selectively set a plurality (for example, four) of setting modes to the operation detection unit 50.

[0121] In the first setting mode (area level 1), the function of the touch detection area R1 is assigned to the central detection area 51, the intermediate detection area 52 is set to the "invalid state", and the function of the protection detection area R3 is assigned to the peripheral detection area 53. In the second setting mode (area level 2), the function of the touch detection area R1 is assigned to the central detection area 51 and the intermediate detection area 52, and the function of the protection detection area R3 is assigned to the peripheral detection area 53. In the third setting mode (area level 3), the touch detection area R1 is assigned to the central detection area 51 and the intermediate detection area 52, and the "invalid state" is set for the peripheral detection area 53. In the fourth setting mode (area level 4), the function of the touch detection area R1 is assigned to the central detection area 51, the intermediate detection area 52, and the peripheral detection area 53.

[0122] <8.2 Function Assignment Change Based on ON Time Duration> In this embodiment, instead of or in addition to the user U's setting operation, the control unit 82 may change the function assignment of the detection area according to the length of time (ON time) during which the ON state is continuously detected by the detection area.

[0123] For example, when the first detection area detects the above-described predetermined operation (e.g., a touch operation), a reception function for the opening device 60 to execute the above-described predetermined function (e.g., the operation of opening the refrigerator door 20A) can be assigned. For the second detection area, a reception function for the control unit 82 to execute the above-described predetermined function (e.g., the operation of opening the refrigerator door 20A) based on the detection result of the second detection area can be assigned. When the detection result for executing the above-described predetermined function is detected for a certain period of time or longer, the control unit 82 suppresses the execution of the above-described predetermined function.

[0124] In this embodiment, the second detection area can selectively assign a predetermined first function and a second function. When the first function is assigned to the second detection area and the above-described predetermined operation is detected by the first detection area for a certain period of time or longer, the control unit 82 changes the function assigned to the second detection area to the second function.

[0125] For example, the second function is a suppression function (e.g., the function of the protection detection area R3) for the control unit 82 to suppress the execution of the above-described predetermined function based on the detection result of the second detection area. For example, when the first function (e.g., the function of the touch detection area R1 or the proximity detection area R2), which is a function different from the suppression function, is assigned to the second detection area and the above-described predetermined operation is detected by the first detection area for a certain period of time or longer, the control unit 82 changes the function assigned to the second detection area to the suppression function.

[0126] The above-described first function and the second function differ in at least one of the type of operation or state of the user U to be detected and the control that the refrigerator 100 performs when the operation or state to be detected is detected. For example, the first function is a function that detects a touch operation to cause an opening operation, and the second function is a function that detects a touch operation to suppress the opening operation. In another example, it is a function that detects a touch operation to cause an opening operation, and it is a function that detects a proximity state to suppress the opening operation.

[0127] FIG. 18 is a diagram showing an example of a change table TA3 for function allocation of a detection area. In the example shown in FIG. 18, the control unit 82 changes the function assigned to the peripheral detection area 53 according to the length of time during which the ON time is continuously detected by the peripheral detection area 53. Note that FIG. 18 is an example corresponding to the second example (see FIG. 17) described above, and describes the case of the sensitivity level 3 (normal). When corresponding to the first example (see FIG. 16) described above, in the following description, "area level 3" may be read as "area level 2", and "area level 4" may be read as "area level 3".

[0128] The change table TA3 is stored in the storage unit 190, for example, as a part of the control information 191. The control unit 82 acquires the function allocation corresponding to the setting mode (area level) selected by the user U based on the change table TA3. The control unit 82 changes the content registered in the area setting information 56b of the operation detection unit 50 using the information indicating the acquired function allocation. Thereby, the sensor control unit 55 can output various notifications based on the changed function allocation.

[0129] In the example shown in FIG. 18, when the setting modes corresponding to "area level 1" and "area level 2" are applied, the control unit 82 assigns the function of the protection detection area R3 to the peripheral detection area 53 regardless of the length of the ON time. By limiting the level of expanding the area in this way, safety is prioritized. When the setting mode corresponding to "area level 3" is applied, the control unit 82 sets the "invalid state" in the peripheral detection area 53 when the length of the ON time is less than 2000 ms, and assigns the function of the protection detection area R3 when the length of the ON time is 2000 ms or more. When the setting mode corresponding to "area level 4" is applied, the control unit 82 sets the "invalid state" in the peripheral detection area 53 when the length of the ON time is less than 500 ms, sets the function of the touch detection area R1 in the peripheral detection area 53 when the length of the ON time is 500 ms or more and less than 2000 ms, and assigns the function of the protection detection area R3 when the length of the ON time is 2000 ms or more.

[0130] Note that by increasing the area level, while the range in which the user U can detect a touch operation becomes wider, there is a case where an erroneous operation is likely to occur. Therefore, in the present embodiment, the peripheral detection area 53 maintains high safety by, for example, assigning the function of the protection detection area R3 when a certain time has elapsed (for example, when exceeding 2000 ms), regardless of the area level.

[0131] In this embodiment, when the setting mode corresponding to "area level 4" is applied, the function of the touch detection area R1 is set in the peripheral detection area 53. Note that the sensitivity of the peripheral detection area 53 functioning as a sub-touch sensor may be set lower than the sensitivity of the central detection area 51 functioning as a main touch sensor. For example, the peripheral detection area 53 functioning as a sub-touch sensor may be configured such that a touch operation is not detected unless it contacts an area wider than the central detection area 51 functioning as a main touch sensor. For example, while the central detection area 51 has a sensitivity such that it exceeds the ON threshold just by a fingertip touching it, the peripheral detection area 53 may be set to a sensitivity such that it does not exceed the ON threshold unless a touch operation is performed with, for example, two or more fingers. Also, the minimum touch ON time Tm1 set for the peripheral detection area 53 may be set longer than the minimum touch ON time Tm1 set for the central detection area 51.

[0132] <8.3 Variations related to function changes in the detection area> Next, common variations in (8.1 Change in function assignment based on the user's setting operation) and (8.2 Change in function assignment based on the length of the ON time) will be described. For example, when the function of the touch detection area R1 is set in two or more detection areas, it may be determined whether the touch ON threshold is exceeded based on the capacitance individually detected in each detection area, and the touch ON time T1 may be counted, or it may be determined whether the touch ON threshold is exceeded based on the added value (total value) of the capacitances detected in a plurality of detection areas, and the touch ON time T1 may be counted.

[0133] Alternatively, in the intermediate detection region 52 with high-sensitivity settings that is used as the proximity detection region R2 in the basic settings, the detection value may saturate (reach the sensor upper limit) immediately before touching the refrigerator door 20A. Therefore, when the function of the touch detection region R1 is also assigned to the intermediate detection region 52, for example, it may be regarded as transitioning to the touch ON state when "the intermediate detection region 52 is saturated" and "the detected value of the capacitance of the central detection region 51 is half of the touch ON threshold Th1 in the basic settings", or it may be regarded as transitioning to the touch OFF state when "the intermediate detection region 52 is less than saturated".

[0134] <8.4 Example of a setting screen related to function change of the detection region> FIG. 19 is a diagram showing an example of a setting screen D1 related to function change of the detection region. The setting screen D1 includes, for example, a switching operation unit TB1 for displaying an operation region AR corresponding to the left refrigerator door 20Aa and a switching operation unit TB2 for displaying an operation region AR corresponding to the right refrigerator door 20Ab. The operation region AR corresponding to the left refrigerator door 20Aa is an operation region for performing a setting operation of the user U related to the left door operation detection unit 50A. The operation region AR corresponding to the right refrigerator door 20Ab is an operation region for performing a setting operation of the user U related to the right door operation detection unit 50B. Each operation region AR includes, for example, operation units B1 to B5.

[0135] The operation unit B1 is an operation unit for switching the validity / invalidity of the door opening function of the refrigerator door 20A by the door opening device 60. The operation unit B2 is an operation unit for changing the door opening strength (door opening speed of the refrigerator door 20A) of the refrigerator door 20A by the door opening device 60.

[0136] The operation unit B3 is an operation unit for changing the sensitivity level of the operation detection unit 50. The operation unit B4 is an operation unit for changing the setting mode of the operation detection unit 50 (for example, the above-described area levels 1 to 4). The operation unit B5 is an operation unit for switching the validity of the drying countermeasure. When the drying countermeasure is set to the invalid state, the control unit 82 performs control in the normal mode (see FIG. 12). On the other hand, when the drying countermeasure is set to the valid state, the control unit 82 performs control in the ON threshold value reduction mode (see FIG. 12) in which the touch ON threshold value is reduced. Instead of / In addition to this, when the drying countermeasure is set to the valid state, the control unit 82 may reduce the proximity ON threshold value Th3 or the protection ON threshold value Th5.

[0137] <9. Setting of Door Opening Timing> Next, the setting of the door opening timing by the door opening device 60 will be described. In the present embodiment, after a predetermined operation (for example, a touch operation) of the user U is detected by the touch detection area R1, the control unit 82 can operate the door opening device 60 based on a change in the detection result of the proximity detection area R2. The refrigerator compartment 11A is an example of the "first storage compartment". The refrigerator compartment door 20A is an example of the "first door". The touch detection area R1 (for example, the central detection area 51) is an example of the "first detection unit". The proximity detection area R2 (for example, the intermediate detection area 52) is an example of the "second detection unit".

[0138] The control unit 82 operates the door opening device 60, for example, when the detection result of the second detection unit changes to a predetermined state after the predetermined operation is detected by the first detection unit. In the present application, the "predetermined state" is, for example, a predetermined state indicating that the user U has left the first door. In the present application, "leaving" means, for example, the disappearance of the proximity state with respect to the first door. The "predetermined state" is, for example, that the detected value of the capacitance by the proximity detection area R2 is lower than the proximity OFF threshold value Th4.

[0139] In the following, several control examples for making the waiting time for the door opening operation longer / shorter when a predetermined condition is satisfied will be described. In these control examples, instead of / in addition to making the waiting time for the door opening operation longer / shorter, the door opening device 60 may be operated so that the door opening speed of the door 20 becomes slower / faster when the predetermined condition is satisfied. For example, in the following description, "making the waiting time longer" may be read as "making the door opening speed slower". Also, in the following description, "making the waiting time shorter" may be read as "making the door opening speed faster".

[0140] <9.1 Control Examples of Door Opening Timing> FIG. 20 is a diagram for explaining the door opening timing by the door opening device 60. The sensor control unit 55 determines that a transition to the proximity ON state has occurred at the time (time t51) when a part of the body of the user U approaches the refrigerator 100 and the detected value of the capacitance by the proximity detection region R2 exceeds the proximity ON threshold Th3. In this case, the sensor control unit 55 starts outputting a signal (proximity notification) indicating that the user U is in the proximity state to the control unit 82.

[0141] Next, the sensor control unit 55 determines that a transition to the touch ON state has occurred at the time (time t52) when the detected value of the capacitance by the touch detection region R1 exceeds the touch ON threshold Th1. In this case, the sensor control unit 55 starts counting the duration of the touch ON state (touch ON time T1). Next, the sensor control unit 55 determines that a transition to the touch OFF state has occurred at the time (time t53) when the detected value of the capacitance by the touch detection region R1 falls below the touch OFF threshold Th2. Then, when the touch ON time T1 is longer than the minimum touch ON time Tm1, the sensor control unit 55 outputs a door opening notification (from time t53 to time t54).

[0142] Thereafter, the sensor control unit 55 determines that a transition to the proximity OFF state has occurred at the time (time t55) when the detected value of the capacitance by the proximity detection region R2 falls below the proximity OFF threshold Th4. In this case, the sensor control unit 55 stops outputting the proximity notification to the control unit 82.

[0143] In this embodiment, the control unit 82 can selectively set, as the door opening timing by the door opening device 60, a first door opening operation mode (normal mode) and a second door opening operation mode (post proximity release mode). For example, the control unit 82 can selectively set the first door opening operation mode and the second door opening operation mode based on the setting operation of the user U. In the first door opening operation mode, in response to the output of the door opening notification being stopped at time t54, the control unit 82 operates the door opening device 60 at time t54, and the door opening device 60 performs a door opening operation of the refrigerator door 20A. On the other hand, in the second door opening operation mode, the control unit 82 does not perform a door opening operation of the refrigerator door 20A by the door opening device 60 immediately after the output of the door opening notification is stopped at time t54. Thereafter, in the second door opening operation mode, in response to transitioning to the proximity OFF state at time t55, the control unit 82 operates the door opening device 60 at time t55, and the door opening device 60 performs a door opening operation of the refrigerator door 20A.

[0144] <9.2 Basic setting of standby time> Next, the basic setting when a standby time is provided will be described. In this embodiment, after a predetermined operation (for example, a touch operation) of the user U is detected by the central detection area 51, when the detection result of the intermediate detection area 52 changes to a predetermined state, the control unit 82 waits for a predetermined time after the change to the predetermined state and then operates the door opening device 60.

[0145] FIG. 21 is another diagram for explaining the door opening timing by the door opening device 60. In this embodiment, as the door opening timing by the door opening device 60, in addition to / replacing the above-described first door opening operation mode and second door opening operation mode, the control unit 82 can execute a third door opening operation mode having a standby time.

[0146] In the third door-opening operation mode, immediately after the control unit 82 transitions to the proximity OFF state near time t55, the door-opening device 60 does not perform the door-opening operation of the refrigerator door 20A. In the third door-opening operation mode, the control unit 82 waits for a standby time Tw from the point in time when it transitions to the proximity OFF state near time t55, and after waiting for the standby time Tw, the control unit 82 operates the door-opening device 60 to perform the door-opening operation of the refrigerator door 20A by the door-opening device 60. In the present embodiment, the length of the standby time Tw is, for example, 1.0 second. Note that the length of the standby time Tw may be changeable based on a setting operation by the user U. Note that instead of being counted starting from the transition to the proximity OFF state near time t55, the standby time Tw may be counted, for example, starting from the stop of the output of the door-opening notification at time t54, or may be counted starting from the transition to the touch OFF state at time t53.

[0147] FIG. 22 is a diagram for explaining the operation due to the difference in door-opening timing. (a) in FIG. 22 shows a case where the door-opening operation of the refrigerator door 20A is performed in the first door-opening operation mode. In this case, since the refrigerator door 20A is opened immediately after the touch operation, the operability of the door-opening device 60 is high, but the user U needs to pay attention to the door-opening operation of the refrigerator door 20A.

[0148] (b) in FIG. 22 shows a case where the door-opening operation of the refrigerator door 20A is performed in the second door-opening operation mode. In this case, the refrigerator door 20A is opened after the user U moves away from the refrigerator 100 a little (for example, after moving away by 10 cm or more). Therefore, the user U does not need to pay as much attention to the door-opening operation of the refrigerator door 20A as in the case of (a) above.

[0149] (c) in FIG. 22 shows a case where the door-opening operation of the refrigerator door 20A is performed in the third door-opening operation mode. In this case, the refrigerator door 20A is opened after the user U moves away from the refrigerator 100 with a margin corresponding to the standby time (for example, after moving away by 10 cm or more and then moving away for an additional 1.0 second of standby time). Therefore, the user U even less needs to pay attention to the door-opening operation of the refrigerator door 20A compared to the case of (b) above.

[0150] <9.3 Change in the Length of the Waiting Time According to the Elapsed Time until the Proximity State is Released> In this embodiment, the control unit 82 can change the length of the waiting time Tw based on the length of the elapsed time Tp from when the predetermined operation (e.g., touch operation) is detected by the touch detection area R1 until the detection result of the proximity detection area R2 changes to a predetermined state (e.g., until the proximity ON state is released). For example, when the elapsed time Tp is long, the control unit 82 changes the length of the waiting time Tw so that the waiting time Tw becomes long. Hereinafter, for convenience of explanation, the elapsed time Tp may be referred to as the "proximity release time". Note that instead of being counted starting from the time when the output of the door opening notification stops at time t54, the elapsed time Tp may be counted starting from, for example, the time when the transition to the touch OFF state occurs at time t53, or may be counted starting from the time when the transition to the touch ON state occurs at time t52, or may be counted starting from the time when the transition to the proximity ON state occurs at time t51.

[0151] FIG. 23 is a diagram for explaining the change in the length of the waiting time Tw. FIG. 23 shows an example when the elapsed time Tp is a relatively short first time (e.g., 0.5 seconds). In this case, the control unit 82 waits for a relatively short first waiting time (e.g., 0.8 seconds) as the waiting time Tw and operates the door opening device 60.

[0152] FIG. 24 is another diagram for explaining the change in the length of the waiting time Tw. FIG. 24 shows an example when the elapsed time Tp is a second time (e.g., 1.0 seconds) longer than the first time. In this case, the control unit 82 waits for a second waiting time (e.g., 2.0 seconds) longer than the first waiting time as the waiting time Tw and operates the door opening device 60.

[0153] FIG. 25 is a diagram showing a change table TA4 for the standby time Tw and the door opening strength. The change table TA4 is stored in the storage unit 190 as part of, for example, the control information 191. In the change table TA4, the correspondence between the elapsed time Tp, the standby time Tw, and the door opening strength is registered. The control unit 82 changes the length of the standby time Tw according to the length of the elapsed time Tp based on the change table TA4. The "reference value" may be, for example, 1.0 second, 0 second, or is not particularly limited.

[0154] In the present embodiment, when the elapsed time Tp exceeds a predetermined threshold time (in the example shown in FIG. 25, when it is 3.0 seconds or more), the control unit 82 suppresses the operation of the door opening device 60. For example, when the elapsed time Tp exceeds a predetermined threshold time, the control unit 82 aborts the door opening operation. Note that "suppressing the operation of the door opening device 60" is not limited to aborting the door opening operation, and may include performing the door opening operation with a weaker force than normal, or asking the user U in advance for permission to operate the door opening device 60 by voice guidance or the like.

[0155] <9.4 Change in Door Opening Strength According to Elapsed Time until Proximity State Release> In the present embodiment, the control unit 82 operates the door opening device 60 so that the door opening strength (door opening speed) of the refrigerator door 20A is different based on the length of the elapsed time Tp from when the above-described predetermined operation (for example, a touch operation) is detected by the touch detection area R1 until the detection result of the proximity detection area R2 changes to a predetermined state (for example, until the proximity ON state is released). For example, the control unit 82 changes the door opening strength so that the longer the elapsed time Tp, the slower the door opening strength (door opening speed) of the refrigerator door 20A (see FIG. 25).

[0156] <9.5 Standby Time When Another Door Is Opened First> Next, the standby time Tw when another door 20 is opened first will be described. In this embodiment, the refrigerator 100 has a first door and a second door different from the first door. When a predetermined operation of the user U (for example, a touch operation on the operation detection unit 50) for opening the first door is detected by the control unit 82 using the door opening device 60, the control content related to the door opening device 60 for opening the first door is varied based on the open / closed state of the second door. "Varying the control content" means, for example, changing the standby time Tw related to the first door or changing the door opening strength (door opening speed) related to the first door, but is not limited thereto.

[0157] In this embodiment, when a predetermined operation of the user U (for example, a touch operation) for opening the first door is detected by the touch detection area R1 and the detection result of the proximity detection area R2 changes to a predetermined state (for example, after the proximity ON state is released), the control unit 82 waits for a predetermined time (standby time Tw) and then operates the door opening device 60. Then, the control unit 82 changes the length of the standby time Tw based on the open / closed state of the second door. For example, the control unit 82 applies the first standby time Tw1 as the standby time Tw when the second door is in the closed state. On the other hand, the control unit 82 applies a second standby time Tw2 different from the first standby time Tw1 as the standby time Tw when the second door is in the open state.

[0158] Here, one of the left refrigerator door 20Aa and the right refrigerator door 20Ab is an example of the "first door". In this embodiment, the other of the left refrigerator door 20Aa and the right refrigerator door 20Ab, the vegetable compartment door 20B, the ice making compartment door 20C, the small freezer door 20D, or the main freezer door 20E is an example of the "second door". The first standby time Tw1 is an example of the "first predetermined time". The second standby time Tw2 is an example of the "second predetermined time". Note that one of the first standby time Tw1 and the second standby time Tw2 may be 0 seconds. Also, the examples of the first door and the second door are not limited to the above examples. For example, the ice making compartment door 20C, the small freezer door 20D, or the main freezer door 20E may correspond to an example of the "first door".

[0159] FIG. 26 is a diagram showing a change table TA5 of the standby time Tw when another door 20 is open. The change table TA5 is stored in the storage unit 190 as part of, for example, the control information 191. In the change table TA5 shown in FIG. 26, the length of the standby time Tw when opening the refrigerator door 20A, and the length of the standby time Tw when another door 20A (vegetable compartment door 20B, ice making compartment door 20C, small freezer compartment door 20D, or main freezer compartment door 20E) has been opened previously are registered. The control unit 82 changes the length of the standby time Tw according to the type of the door 20 that has been opened previously based on the change table TA5.

[0160] Further, the control unit 82 can selectively set the length of the standby time Tw from among a “medium setting” which is a standard setting, a “fast setting” which is shorter than the standard setting, and a “slow setting” which is longer than the standard setting, based on the setting operation of the user U. Hereinafter, examples in the case where the “medium setting” is set and when each door 20 has been opened previously will be described.

[0161] <9.5.1 When the door of an adjacent storage compartment has been opened previously> First, the case where the refrigerator door 20A is opened by the door opening device 60 with the door of an adjacent storage compartment (for example, the vegetable compartment door 20B) opened previously will be described. The refrigerator compartment 11A is an example of a “first storage compartment”. The vegetable compartment 11B is an example of a “second storage compartment”. The vegetable compartment 11B is a storage compartment adjacent to the refrigerator compartment 11A in the refrigerator 100. The refrigerator door 20A is an example of a “first door”. The vegetable compartment door 20B is an example of a “second door”.

[0162] FIG. 27 is a diagram showing the standby time Tw when opening the refrigerator door 20A when the vegetable compartment door 20B has been opened previously. When a predetermined operation (for example, a touch operation) of the user U for opening the refrigerator door 20A is detected by the operation detection unit 50, the control unit 82 applies a first standby time Tw1 (for example, 1.0 second, see FIG. 21) as the standby time Tw when the vegetable compartment door 20B is closed, and applies a second standby time Tw2 (for example, 0.5 second, see FIG. 27) which is shorter than the first standby time Tw1 as the standby time Tw when the vegetable compartment door 20B is open.

[0163] FIG. 28 is a diagram for explaining the operation when the vegetable compartment door 20B is opened first. When the vegetable compartment door 20B is opened first, the user U is farther away from the refrigerator compartment door 20A by the amount that the vegetable compartment door 20B protrudes forward compared to when the vegetable compartment door 20B is closed. For this reason, even if the waiting time Tw for opening the refrigerator compartment door 20A is shortened, there is little need for the user U to increase attention, and since the waiting time Tw is short, the waiting time of the user U is shortened.

[0164] (Modification example) In another modification example, the second waiting time Tw2 may be 0 seconds. In other words, when a predetermined operation (for example, a touch operation) of the user U for opening the refrigerator compartment door 20A is detected by the operation detection unit 50, the control unit 82 waits for a predetermined time (waiting time Tw) in a state where the vegetable compartment door 20B is closed and then opens the refrigerator compartment door 20A, and may open the refrigerator compartment door 20A without providing a waiting time in a state where the vegetable compartment door 20B is open.

[0165] <9.5.2 When the door of a remote storage compartment is opened first> Next, a case where the refrigerator compartment door 20A is opened by the door opening device 60 in a state where the door of a remote storage compartment (for example, the ice making compartment door 20C, the small freezer compartment door 20D, or the main freezer compartment door 20E) is opened first will be described. The refrigerator compartment 11A is an example of the "first storage compartment". The ice making compartment 11C, the small freezer compartment 11D, or the main freezer compartment 11E is an example of the "second storage compartment". The ice making compartment 11C, the small freezer compartment 11D, or the main freezer compartment 11E is a storage compartment remote from the refrigerator compartment 11A in the refrigerator 100. The refrigerator compartment door 20A is an example of the "first door". The ice making compartment door 20C, the small freezer compartment door 20D, or the main freezer compartment door 20E is an example of the "second door".

[0166] FIG. 29 is a diagram showing a waiting time Tw when opening the refrigerator door 20A when the main freezer door 20E is already open. When a predetermined operation (for example, a touch operation) of the user U for opening the refrigerator door 20A is detected by the operation detection unit 50, the control unit 82 applies a first waiting time Tw1 (for example, 1.0 second, see FIG. 21) as the waiting time Tw when the main freezer door 20E is closed, and applies a second waiting time Tw2 (for example, 2.0 seconds, see FIG. 29), which is longer than the first waiting time Tw1, as the waiting time Tw when the main freezer door 20E is open.

[0167] FIG. 30 is a diagram for explaining the operation when the main freezer door 20E is already open. When the main freezer door 20E is already open, the user U may be closer to the refrigerator door 20A than when the main freezer door 20E is closed. Also, for example, when the main freezer door 20E is open, it is assumed that an opening door notification may be output when the head touches the operation detection unit 50 when the body is bent. Therefore, by lengthening the waiting time Tw for opening the refrigerator door 20A, the user U can be given some leeway. Note that when the main freezer door 20E is already open, the refrigerator 100 may give a warning by a buzzer sound or the like before opening the refrigerator door 20A. The same applies to the ice making chamber door 20C or the small freezer door 20D instead of the main freezer door 20E.

[0168] (Modification example) In one modification example, the first waiting time Tw1 may be 0 second. In other words, when a predetermined operation (for example, a touch operation) of the user U for opening the refrigerator door 20A is detected by the operation detection unit 50, the control unit 82 opens the refrigerator door 20A without providing a predetermined time (waiting time Tw) when the main freezer door 20E is closed, and may open the refrigerator door 20A after waiting for a predetermined time (waiting time Tw) when the main freezer door 20E is open. The same applies to the ice making chamber door 20C or the small freezer door 20D, not limited to the main freezer door 20E.

[0169] (Door opening timing from another perspective) Stating <9.5.1> and <9.5.2> described above from another perspective, the refrigerator 100 has a first storage compartment, a second storage compartment, and a third storage compartment disposed on the side opposite to the first storage compartment with respect to the second storage compartment. The refrigerator 100 has a first door capable of closing the first storage compartment, a second door capable of closing the opening of the second storage compartment, and a third door capable of closing the opening of the third storage compartment. The control unit 82 applies a fourth standby time Tw4 (for example, 0.5 seconds, see FIG. 27) as the standby time Tw in a state where the second door is opened, and applies a fifth standby time Tw5 (for example, 2.0 seconds, see FIG. 29), which is longer than the fourth standby time Tw4, as the standby time Tw in a state where the third door is opened.

[0170] The refrigerating compartment 11A is an example of the "first storage compartment". The vegetable compartment 11B is an example of the "second storage compartment". The ice-making compartment 11C, the small freezing compartment 11D, or the main freezing compartment 11E is an example of the "third storage compartment". The refrigerating compartment door 20A is an example of the "first door". The vegetable compartment door 20B is an example of the "second door". The ice-making compartment door 20C, the small freezing compartment door 20D, or the main freezing compartment door 20E is an example of the "third door". The fourth standby time Tw4 is an example of the "fourth predetermined time". The fourth standby time Tw4 may be 0 seconds. The fifth standby time Tw5 is an example of the "fifth predetermined time".

[0171] <9.5.3 When opening the left refrigerating compartment door with the right refrigerating compartment door already opened first> Next, a case where the left refrigerating compartment door 20Aa is opened by the door opening device 60 in a state where the right refrigerating compartment door 20Ab has been opened first will be described. The left refrigerating compartment door 20Aa is an example of the "first door". The right refrigerating compartment door 20Ab is an example of the "second door". The right refrigerating compartment door 20Ab can close the opening of the refrigerating compartment 11A together with the left refrigerating compartment door 20Aa. The right refrigerating compartment door 20Ab is a door having a larger dimension (for example, a horizontal dimension) than the left refrigerating compartment door 20Aa.

[0172] When the operation detection unit 50 of the left refrigerator door 20Aa is operated while the right refrigerator door 20Ab is closed, the control unit 82 applies the first standby time Tw1 as the standby time Tw. On the other hand, when the operation detection unit 50 of the left refrigerator door 20Aa is operated while the right refrigerator door 20Ab is open, the control unit 82 applies a second standby time Tw2 shorter than the first standby time Tw1 as the standby time Tw.

[0173] This is because when the large right refrigerator door 20Ab is opened first, the user U is assumed to be near the end of the large right refrigerator door 20Ab. For this reason, the user U is away from the opening range of the small left refrigerator door 20Aa, and even if the standby time Tw for opening the small left refrigerator door 20Aa is shortened, there is little need for the user U to increase attention.

[0174] Also, in the present embodiment, when the operation detection unit 50 of the left refrigerator door 20Aa is operated while the vegetable compartment door 20B is opened first, the control unit 82 applies the third standby time Tw3 as the standby time Tw. The refrigerator compartment 11A is an example of the "first storage compartment". The vegetable compartment 11B is an example of the "second storage compartment". The vegetable compartment door 20B is an example of the "third door". The third standby time Tw3 is an example of the "third predetermined time". In this example, the relationship of "third standby time Tw3 ≤ second standby time Tw2 < first standby time Tw1" holds.

[0175] <9.5.4 When the right refrigerator door is opened with the left refrigerator door opened first> Next, the case where the right refrigerator door 20Ab is opened by the door opening device 60 with the left refrigerator door 20Aa opened first will be described. The right refrigerator door 20Ab is an example of the "first door". The left refrigerator door 20Aa is an example of the "second door". The left refrigerator door 20Aa can close the opening of the refrigerator compartment 11A together with the right refrigerator door 20Ab. The left refrigerator door 20Aa is a door with a smaller dimension (for example, a horizontal width dimension) compared to the right refrigerator door 20Ab.

[0176] When the operation detection unit 50 of the right refrigerator door 20Ab is operated with the left refrigerator door 20Aa closed, the control unit 82 applies the first standby time Tw1 as the standby time Tw. On the other hand, when the operation detection unit 50 of the right refrigerator door 20Ab is operated with the left refrigerator door 20Aa open, the control unit 82 applies a second standby time Tw2 that is longer than the first standby time Tw1 as the standby time Tw.

[0177] When the small left refrigerator door 20Aa is opened first, it is assumed that the user U is near the end of the small left refrigerator door 20Aa. At this time, it is highly likely that a part of the user U's body is still within the opening range of the large right refrigerator door 20Ab. For this reason, it is preferable to increase the standby time Tw for opening the large right refrigerator door 20Ab.

[0178] Also, in this embodiment, when the operation detection unit 50 of the left refrigerator door 20Aa is operated with the vegetable compartment door 20B opened first, the control unit 82 applies a third standby time Tw3 as the standby time Tw. The refrigerator compartment 11A is an example of the "first storage compartment". The vegetable compartment 11B is an example of the "second storage compartment". The vegetable compartment door 20B is an example of the "third door". The third standby time Tw3 is an example of the "third predetermined time". In this example, the relationship of "third standby time Tw3 ≤ first standby time Tw1 < second standby time Tw2" holds.

[0179] <9.5.5 Variations related to door opening timing> The lengths of the respective standby times Tw described above (for example, the lengths of the first to fifth standby times Tw1, Tw2, Tw3, Tw4, Tw5 described in <9.5.1> to <9.5.4>) may be individually changed. For example, the control unit 82 can individually change the registered content of each standby time Tw (for example, the content registered in the change table TA5) based on the setting operation of the user U.

[0180] <10. Control examples related to suppression of door opening operation> <10.1 Control example when multiple touch operations are detected> In this embodiment, after a predetermined operation (e.g., a touch operation) of the user U is detected by the touch detection area R1 and before the detection result of the proximity detection area R2 changes to a predetermined state (e.g., before the proximity ON state is released), if a predetermined operation (e.g., a touch operation) of the user U is detected again by the touch detection area R1, the control unit 82 suppresses the operation of the door opening device 60 even if the detection result of the proximity detection area R2 changes to a predetermined state (e.g., even if the proximity ON state is released). This control example is not limited to the third door opening operation mode described above and may be applied to the second door opening operation mode.

[0181] FIG. 31 is a diagram showing a control example when a plurality of predetermined operations are detected during one proximity state. In the example shown in FIG. 31, before the proximity ON state is released at time t55, a second touch operation is detected at time t61, and a second door opening notification is output at time t62.

[0182] FIG. 32 is a diagram for explaining the case where a plurality of predetermined operations are detected. Here, according to the normal operation of the user U, one touch operation is performed in relation to one proximity state. In this embodiment, when a plurality of touch operations are detected during one proximity state, it is regarded as a contact different from the normal touch operation, and the door opening operation is suppressed. As an example where a plurality of touch operations are detected in relation to one proximity state, a state where a child leans against the refrigerator door 20A and the back of the head contacts the operation detection unit 50 several times is assumed.

[0183] <10.2 Control Example When a Plurality of Proximity States are Detected> FIG. 33 is a diagram showing a control example when a proximity state is detected multiple times. In the example shown in FIG. 33, the proximity state is detected again at time t71 before time t56 when the door opening operation is performed. In this control example, after a predetermined operation (for example, a touch operation) of the user U is detected by the touch detection area R1, when the detection result of the proximity detection area R2 changes to a predetermined state (for example, when the proximity ON state is released), the control unit 82 waits for a predetermined time (waiting time Tw) after the change to the predetermined state and then operates the door opening device 60. However, if it is detected by the proximity detection area R2 that the user U approaches the refrigerator door 20A again during the predetermined time (waiting time Tw), the control unit 82 suppresses the operation of the door opening device 60.

[0184] This is because when the proximity state is detected again, it is assumed that the user U continues to be near the refrigerator door 20A. Note that the process of suppressing the door opening operation when the proximity state is detected again may seem to the user U that the door opening device 60 has malfunctioned. Therefore, the control unit 82 may use a buzzer provided in the refrigerator 100 (for example), a voice dialogue device provided in the refrigerator 100, or an external voice dialogue device to notify the user of the cancellation of the door opening operation by a buzzer sound or voice guidance.

[0185] (Modification example) FIG. 34 is a diagram showing another control example when a plurality of proximity states are detected. In this control example, when it is detected by the proximity detection area R2 that the user U approaches the refrigerator door 20A again during the above-mentioned predetermined time (standby time Tw), the control unit 82 suppresses the operation of the door opening device 60. In this control example, when the control unit 82 suppresses the operation of the door opening device 60, when the second proximity ON state is released (for example, when the second proximity ON state is released within a predetermined time (threshold time Tth)), after waiting for a predetermined time (standby time Tw) from the time t72 when the second proximity ON state is released, an operation of opening the refrigerator door 20A is performed at the time t73 after waiting for the predetermined time (standby time Tw). In this control example, when the second proximity ON state is not released within a predetermined time (threshold time Tth), the control unit 82 suppresses the operation of the door opening device 60 even after the second proximity ON state is released.

[0186] <10.3 Control Example When the Elapsed Time until the Proximity State is Released after the Touch Operation is Long> FIG. 35 is a diagram showing a control example when the elapsed time until the proximity state is released after the touch operation is long. In the example shown in FIG. 35, a touch operation is detected from time t52 to time t53, and the first elapsed time TsA after the door opening notification is output from time t53 to time t54 is longer than the first threshold time TthA.

[0187] In this control example, when the elapsed time TsA (for example, 3.5 seconds) from when a predetermined operation (for example, a touch operation) of the user U is detected by the touch detection area R1 until the detection result of the proximity detection area R2 changes to a predetermined state (for example, until the proximity ON state is released) (for example, 3.5 seconds) exceeds the threshold time TthA (for example, 3.0 seconds), the control unit 82 suppresses the operation of the door opening device 60. Note that the starting points of the elapsed time TsA and the threshold time TthA are not limited to, for example, the time point (time t54) when the output of the door opening notification stops, and may be the time (time t53) when the transition to the touch OFF state occurs, or the time (time t52) when the transition to the touch ON state occurs.

[0188] <10.4 Control Example When Returning after the Door Opening Operation is Suppressed> As shown in FIG. 35, when the control unit 82 suppresses the operation of the door opening device 60, for example, it determines whether or not the elapsed time TsB (e.g., 2.0 seconds) from the release of the proximity ON state (time t55) to the detection of the next proximity ON state (time t91) is less than the threshold time TthB (e.g., 5.0 seconds). When the elapsed time TsB is greater than or equal to the threshold time TthB, the control unit 82 returns to the normal door opening operation mode (e.g., the third door opening operation mode). On the other hand, when the elapsed time TsB is less than the threshold time TthB, the control unit 82 continues to suppress the operation of the door opening device 60 regardless of the operation content in the second proximity state (e.g., even when the first elapsed time TsA is shorter than the first threshold time TthA).

[0189] FIG. 36 is a diagram for explaining the case where the elapsed time from the detection of the touch operation to the release of the proximity state is long. Examples of the case where the elapsed time from the detection of the touch operation to the release of the proximity state is long include a state where the user U is slouching due to poor physical condition or the like.

[0190] <11. Setting of Door Opening Strength (Door Opening Speed)> Next, the setting of the door opening strength (door opening speed) by the door opening device 60 will be described. In the present embodiment, when the control unit 82 performs an operation of opening the refrigerator door 20A by the door opening device 60 based on a predetermined operation (predetermined movement) of the user U, the control unit 82 changes the door opening strength (door opening speed) of the refrigerator door 20A based on the presence or absence of the previously opened door 20 and the type of the previously opened door 20.

[0191] FIG. 37 is a diagram showing a change table TA6 of the opening strength (opening speed) of the refrigerator door 20A when another door 20 is opened first. The numerical values in FIG. 37 indicate the ratio to the opening strength when all the doors 20 are closed. Also, this embodiment takes into account the change in the negative pressure inside the cabinet. In the refrigerator 100 of this embodiment, the refrigerator compartment 11A and the vegetable compartment 11B can be regarded as a single space communicating with each other via an air duct G1 or the like. When the refrigerator door 20A or the vegetable compartment door 20B is closed, air is pushed out of this space to the outside of the refrigerator 100, and the inside of the cabinet becomes a negative pressure state with respect to the outside of the cabinet. Since this negative pressure can make it difficult to open the door, a structure is provided in the gasket provided between the door 20 and the housing 10 to allow a small amount of air to enter the cabinet from the outside of the cabinet. Also, when performing a defrosting process to melt the frost adhering to the refrigeration cooler 41, air may enter the cabinet through a drain pipe for discharging the defrosting water to the outside of the cabinet. Therefore, after the refrigerator door 20A and the vegetable compartment door 20B are closed, the negative pressure inside the cabinet decreases over time. "High negative pressure" in FIG. 37 means a case where the negative pressure in the refrigerator compartment 11A is high and less than a predetermined time (for example, 20 seconds) after the refrigerator door 20A and the vegetable compartment door 20B are closed. "Low negative pressure" in FIG. 37 means a case where the negative pressure in the refrigerator compartment 11A is low and more than a predetermined time (for example, 20 seconds) has elapsed after the refrigerator door 20A and the vegetable compartment door 20B are closed. The change table TA6 is stored in the storage unit 190, for example, as part of the control information 191.

[0192] The control unit 82 changes the opening strength (opening speed) of the refrigerator door 20A according to the presence and type of the door 20 that has been opened first based on the change table TA6. Also, the control unit 82 can selectively set the opening strength among "medium setting" which is the standard setting, "strong setting" which is stronger than the standard setting, and "weak setting" which is weaker than the standard setting based on the setting operation of the user U.

[0193] <12. Example of a setting screen related to the opening timing and opening strength> FIG. 38 is a diagram showing an example of a setting screen D2 related to door opening timing and door opening strength. The setting screen D2 includes, for example, a switching operation unit TB1 for displaying an operation area AR corresponding to the left refrigerator door 20Aa, and a switching operation unit TB2 for displaying an operation area AR corresponding to the right refrigerator door 20Ab. Each operation area AR includes, for example, an operation unit B1 and operation units B11 to B14.

[0194] The operation unit B11 is an operation unit for changing the door opening strength of the refrigerator door 20A by the door opening device 60. For example, the operation unit B11 is an operation unit for selecting "weak setting", "medium setting", or "strong setting" described with reference to FIG. 37. The operation unit B12 is an operation unit for changing whether to change the length of the standby time Tw according to the length of the elapsed time Tp until the proximity state is released. For example, the operation unit B12 is an operation unit for selecting whether to perform the control described with reference to FIGS. 23, 24, 25, etc.

[0195] The operation unit B13 is an operation unit for selecting whether to operate the door opening device 60 when the hand leaves the touch detection area R1 (for example, operate in the first door opening operation mode), or to operate the door opening device 60 after the proximity ON state is released (for example, operate in the second door opening operation mode or the third door opening operation mode). The operation unit B14 is an operation unit for changing the length of the standby time Tw. For example, the operation unit B14 is an operation unit for selecting "slow setting", "medium setting", or "fast setting" described with reference to FIG. 26.

[0196] <13. Control Flow> <13.1 Basic Processing Flow> FIG. 39 is a flowchart showing the control flow related to the door opening device 60. First, the control unit 82 determines whether it has received a proximity notification from the operation detection unit 50 (S111). If the control unit 82 does not receive a proximity notification from the operation detection unit 50 (S111: NO), it returns to the process of S111 and continues monitoring.

[0197] When the control unit 82 receives a proximity notification from the operation detection unit 50 (S111: YES), it determines whether it has received a door opening notification from the operation detection unit 50 (S112). When the control unit 82 does not receive a door opening notification from the operation detection unit 50 (S112: NO), it returns to the process of S111 and continues monitoring.

[0198] When the control unit 82 receives a door opening notification from the operation detection unit 50 (S112: YES), it determines whether the door opening notification has subsequently transitioned to the OFF state (S113). When the door opening notification does not transition to the OFF state (S113: NO), the control unit 82 returns to the process of S113 and continues monitoring.

[0199] When the door opening notification has transitioned to the OFF state (S113: YES), the control unit 82 starts measuring the proximity release time (elapsed time Tp) (S114). After starting the measurement of the proximity release time (elapsed time Tp) and before the proximity notification transitions to the OFF state (i.e., during one proximity state), the control unit 82 determines whether it has received the door opening notification again (S115). When the control unit 82 receives the door opening notification again (S115: YES), it aborts the door opening operation (S124).

[0200] When the control unit 82 does not receive the door opening notification again (S115: NO), it determines whether the proximity notification has transitioned to the OFF state (S116). When the proximity notification does not transition to the OFF state (S116: NO), the control unit 82 returns to the process of S115 and continues monitoring. When the proximity notification has transitioned to the OFF state (S116: YES), the control unit 82 ends the measurement of the proximity release time (elapsed time Tp) (S117).

[0201] The control unit 82 determines whether the measured proximity release time (elapsed time Tp) is within a predetermined threshold time TthA (S118). When the measured proximity release time (elapsed time Tp) exceeds the predetermined threshold time TthA (S118: NO), the control unit 82 aborts the door opening operation (S124). On the other hand, when the measured proximity release time (elapsed time Tp) is within the predetermined threshold time TthA (S118: YES), the control unit 82 sets a predetermined standby time Tw and starts waiting until the standby time Tw elapses (S119). The details of the process of setting the standby time Tw will be described later with reference to FIG. 40.

[0202] While waiting for the standby time Tw to elapse, the control unit 82 determines whether the refrigerator door 20A is in the closed state based on the detection result of the refrigerator door open sensor 111 (S120). When the refrigerator door 20A is in the open state (S120: NO), the control unit 82 aborts the door opening operation (S124). On the other hand, when the refrigerator door 20A is in the closed state (S120: YES), the control unit 82 determines whether a proximity notification has been received again (S121). When the control unit 82 receives a proximity notification again (S121: YES), the control unit 82 aborts the door opening operation (S124).

[0203] When the control unit 82 has not received a proximity notification again (S121: NO), the control unit 82 determines whether the standby time Tw has elapsed (S122). When the standby time Tw has not elapsed (S122: NO), the control unit 82 returns to the process of S120 and continues monitoring. When the standby time Tw has elapsed (S122: YES), the control unit 82 operates the door opening device 60 to perform the door opening operation of the refrigerator door 20A (S123). Thereby, a series of processes are completed.

[0204] <13.2 Process of setting standby time> FIG. 40 is a flowchart showing the flow of the process of setting the standby time Tw. First, the control unit 82 determines whether the main refrigerator door 20E is open (S131). When the main refrigerator door 20E is open (S131: YES), the control unit 82 sets a standby time Tw having a length corresponding to the case where the main refrigerator door 20E is open (S141).

[0205] When the main freezer door 20E is closed (S131: NO), the control unit 82 determines whether the small freezer door 20D is open (S132). When the small freezer door 20D is open (S132: YES), the control unit 82 sets a standby time Tw of a length corresponding to the case where the small freezer door 20D is open (S142).

[0206] When the small freezer door 20D is closed (S132: NO), the control unit 82 determines whether the ice-making chamber door 20C is open (S133). When the ice-making chamber door 20C is open (S133: YES), the control unit 82 sets a standby time Tw of a length corresponding to the case where the ice-making chamber door 20C is open (S143).

[0207] When the ice-making chamber door 20C is closed (S133: NO), the control unit 82 determines whether the vegetable chamber door 20B is open (S134). When the vegetable chamber door 20B is open (S134: YES), the control unit 82 sets a standby time Tw of a length corresponding to the case where the vegetable chamber door 20B is open (S144).

[0208] When the vegetable chamber door 20B is closed (S134: NO), the control unit 82 sets a standby time Tw of a length corresponding to the case where all the doors 20 are closed (S135). Note that in the processes of S141, S142, S143, S144, or S135, the control unit 82 changes the length of the standby time Tw based on the setting content ("early setting", "medium setting", "late setting") selected by the user U.

[0209] Also, when the proximity ON state is released, the control unit 82 changes the length of the standby time Tw based on the elapsed time Tp until the proximity ON state is released (S136). Thereby, a series of processes for setting the standby time Tw is completed.

[0210] <B. Second Embodiment> Next, referring to FIGS. 41 to 43, the second embodiment will be described. The second embodiment is different from the first embodiment in that the operation detection unit 50 has an infrared sensor. The configuration other than that described below is the same as that of the first embodiment.

[0211] (Operation detection unit) FIG. 41 is a front view showing the operation detection unit 50 of the second embodiment. FIG. 42 is a block diagram of the functional configuration related to the operation detection unit 50. As shown in FIGS. 41 and 42, the operation detection unit 50 of the second embodiment includes a first central detection region 51A, a second central detection region 51B, a peripheral detection region 53, a first light emitting unit 54A, a second light emitting unit 54B, a sensor control unit 55, a storage unit 56, and an infrared sensor 57. Each of the first central detection region 51A, the second central detection region 51B, and the peripheral detection region 53 is an independent planar capacitive sensor (pad-type capacitive sensor).

[0212] (First central detection region) The first central detection region 51A is provided, for example, on the left part of the central region of the operation detection unit 50 when the refrigerator 100 is viewed from the front. The first central detection region 51A is, for example, an elongated rectangular detection region extending in the vertical direction. The function of the touch detection region R1 is assigned to the first central detection region 51A, for example. Also, when the function assignment in the operation detection unit 50 is changed based on the setting operation of the user U (for example, when the area (number) of the detection region for detecting a touch operation is changed), the first central detection region 51A can be changed to an "invalid state" or a "protective detection region R3".

[0213] (Second central detection region) When, for example, the refrigerator 100 is viewed from the front, the second central detection area 51B is provided in the right part of the central area of the operation detection unit 50. The second central detection area 51B is, for example, an elongated rectangular detection area extending in the vertical direction. A gap is provided between the first central detection area 51A and the second central detection area 51B. For example, the function of the touch detection area R1 is assigned to the second central detection area 51B. Further, when the function assignment in the operation detection unit 50 is changed based on the setting operation of the user U (for example, when the area (number) of the detection area for detecting a touch operation is changed), the second central detection area 51B can be changed to an "invalid state" or a "protective detection area R3".

[0214] Note that the functions assigned to the first central detection area 51A and the second central detection area 51B are not limited to the above example. For example, instead of functioning as the same immediately operating touch sensors (sensors that output an open door notification immediately after a touch operation) for the first central detection area 51A and the second central detection area 51B, they may function as touch sensors with different output timings for the open door notification. For example, a function as a sensor that outputs an open door notification immediately after a touch operation may be assigned to the first central detection area 51A, and a function as a sensor that waits for a predetermined time (for example, 1.0 second) after a touch operation and then outputs an open door notification may be assigned to the second central detection area 51B. Also, a function that causes an open door operation with a strong open door strength may be assigned to the first central detection area 51A, and a function that causes an open door operation with a weak open door strength may be assigned to the second central detection area 51B. In the above description, the functions assigned to the first central detection area 51A and the second central detection area 51B may be reversed.

[0215] (Peripheral detection area) When viewing the refrigerator 100 from the front, for example, the peripheral detection area 53 is arranged to surround the first central detection area 51A and the second central detection area 51B integrally. In the present embodiment, the peripheral detection area 53 includes a first portion 53a, a second portion 53b, a third portion 53c, and a fourth portion 53d. The first portion 53a is arranged on the left side of the first central detection area 51A. The first portion 53a extends in the vertical direction along the first central detection area 51A. The second portion 53b is arranged on the right side of the second central detection area 51B. The second portion 53b extends in the vertical direction along the second central detection area 51B. The third portion 53c extends in the horizontal direction and connects the upper end portion of the first portion 53a and the upper end portion of the second portion 53b. The fourth portion 53d extends in the horizontal direction and connects the lower end portion of the first portion 53a and the lower end portion of the second portion 53b. For example, the function of the protection detection area R3 is assigned to the peripheral detection area 53.

[0216] (First light-emitting unit) A plurality of first light-emitting units 54A are arranged to surround the first central detection area 51A. For example, when the function of the touch detection area R1 is assigned to the first central detection area 51A and the proximity state of the user U is detected by the infrared sensor 57 described later, the sensor control unit 55 causes the plurality of first light-emitting units 54A to emit light and notifies the user U of the position of the first central detection area 51A.

[0217] (Second light-emitting unit) A plurality of second light-emitting units 54B are arranged to surround the second central detection area 51B. For example, when the function of the touch detection area R1 is assigned to the second central detection area 51B and the proximity state of the user U is detected by the infrared sensor 57 described later, the sensor control unit 55 causes the plurality of second light-emitting units 54B to emit light and notifies the user U of the position of the second central detection area 51B.

[0218] (Infrared sensor) The infrared sensor 57 is disposed at the center of the operation detection unit 50. For example, the infrared sensor 57 is disposed between the first central detection area 51A and the second central detection area 51B. By detecting infrared rays, the infrared sensor 57 detects the proximity state of the user U to the refrigerator door 20A. The infrared sensor 57 is assigned, for example, the same function as the proximity detection area R2.

[0219] In the present embodiment, the control unit 82 can change the proximity state and the detected distance (proximity distance) by communicating with the sensor control unit 55. For example, the control unit 82 can change the proximity distance by changing the value of the proximity ON threshold included in the threshold setting information 56a.

[0220] FIG. 43 is a diagram showing an example of the setting screen D2 of the second embodiment. The setting screen D2 of the second embodiment includes an operation unit B15. The operation unit B15 is an operation unit for changing the proximity distance. In the example shown in FIG. 43, based on the setting operation of the user U, "5 cm", "10 cm", or "15 cm" can be selected as the proximity distance.

[0221] According to such a configuration, the detection accuracy of the proximity state can be improved as compared with the first embodiment. For example, in the case of a capacitive proximity sensor, the capacitance area is different when the user U brings only the fingertips close and when the user U brings the palm close, and the detection result of the proximity state may be different. Further, since the amount of moisture in the human body changes depending on the season and age, the detection result of the proximity state may be different. On the other hand, when an infrared sensor is used as the proximity sensor, the detection accuracy can be improved even when there are changes in the capacitance area and the amount of moisture. Therefore, the opening device 60 can perform a more stable operation.

[0222] For example, when the setting of the proximity distance can be changed, it becomes easier to change the opening timing by the opening device 60 according to the installation situation of the refrigerator 100 (for example, when the space in front of the refrigerator 100 is narrow) or the personality of the user U (for example, an impatient personality).

[0223] <C. Advantages> Next, the advantages of the first and second embodiments will be described.

[0224] (Advantages related to the change of the threshold time) In the embodiment, the control unit 82 operates the device when the time when the predetermined operation of the user U is detected by the operation detection unit 50 exceeds the threshold time. The above threshold time is changeable. According to such a configuration, for example, the threshold time can be changed according to the request of the user U (or the change of the threshold of another physical quantity, seasons, surrounding situations, etc.), so that the malfunction of the above device can be suppressed.

[0225] In the embodiment, the above threshold time can be changed based on the setting operation of the user U. According to such a configuration, for example, by setting the above threshold time short, it is possible to meet the wish of the user U of "want to open the door immediately". Also, by setting the above threshold time long, for example, the possibility of erroneously detecting that a part of the user U's clothing touches the operation detection unit can be reduced, and it becomes easier to suppress unintended door opening. Also, for example, according to the family composition of the user U (elderly people or children), the installation position of the refrigerator 100 (the space in front of the refrigerator 100 is wide / narrow, the positional relationship with the gas stove, sink, dining table, etc.), the personality and habits of the user U, hobbies (impatient / leisurely, walking closely to the refrigerator 100, or wearing loose clothes), etc., the above threshold time can be changed.

[0226] In the embodiment, the threshold of the physical quantity for detecting the above predetermined operation is changeable. The control unit 82 changes the above threshold time when the threshold of the above physical quantity is changed. According to such a configuration, in response to performing an operation of changing the threshold of the physical quantity, the above threshold time is changed without performing a special additional operation. Thereby, further improvement in the convenience of the user U can be achieved.

[0227] In the embodiment, when the control unit 82 changes the threshold value of the physical quantity so as to decrease it, the control unit 82 changes the threshold time so as to increase it. According to such a configuration, for example, when the threshold value of the physical quantity is decreased in order to make it easier to determine the ON state (for example, so that a capacitance-type sensor reacts even in a dry state in winter), the threshold time is changed so as to increase. Therefore, it is possible to suppress an increase in the possibility that false detection occurs in response to a decrease in the threshold value of the physical quantity.

[0228] In the embodiment, it is possible to set to a first mode in which a first threshold value is applied as the threshold value of the physical quantity and a first threshold time is applied as the threshold time, and a second mode in which a second threshold value lower than the first threshold value is applied as the threshold value of the physical quantity and a second threshold time longer than the first threshold time is applied as the threshold time. When the control unit 82 changes the threshold value of the physical quantity so as to decrease it, in the first mode, the control unit 82 changes the first threshold time so as to increase it by a first degree, and in the second mode, the control unit 82 changes the second threshold time so as to increase it by a second degree smaller than the first degree. According to such a configuration, it becomes easier to suppress the originally long second threshold time from becoming even longer.

[0229] (Advantages regarding change in function assignment to detection area) In the embodiment, the operation detection unit 50 includes a plurality of detection areas. And the area used as the area capable of detecting the predetermined operation in the plurality of detection areas can be changed. According to such a configuration, the area capable of detecting the predetermined operation can be changed. Thereby, further improvement in convenience can be achieved.

[0230] For example, even for a user U who has difficulty operating only a specific detection area due to, for example, "the user U has poor eyesight such as being unable to grasp the sense of distance", "low height / high height", "hands shaking due to high blood pressure", etc., by changing the area used as the area capable of detecting the predetermined operation, it becomes easy to detect the predetermined operation.

[0231] For example, in the case of elderly users U or in winter, due to dryness, the moisture content of the fingertips changes, and the detection ability of the touch detection area R1 may be dulled to a level where touch operations are difficult to recognize. Here, in the case of a capacitive sensor, the capacitance can be increased by increasing the contact area. For example, the contact area can be increased as "fingertip < finger pad < two fingers < palm". In this case, if the area used as the area where the operation detection unit 50 can detect the above-described predetermined operation can be changed, it is easier for the user U to perform an operation by increasing the contact area.

[0232] In the embodiment, the plurality of detection areas include a first detection area and a second detection area. The first detection area is used as an area where the predetermined operation can be detected, and the second detection area is used as an area where content different from the predetermined operation can be detected, in a first detection state. And a second detection state in which the first detection area and the second detection area are used as areas where the predetermined operation can be detected. According to such a configuration, by setting the first detection state, the plurality of detection areas can be used for a plurality of purposes. On the other hand, by setting the second detection state, the area where the predetermined operation can be detected can be increased. Thereby, further improvement in the convenience of the user U can be achieved.

[0233] In the embodiment, the first detection area can be assigned a reception function for the apparatus to execute a predetermined function when the predetermined operation is detected. The second detection area can be assigned a reception function for the control unit 82 to execute the predetermined function based on the detection result of the second detection area. The control unit 82 suppresses the execution of the predetermined function when the detection result for executing the predetermined function is detected for a certain period of time or more. According to such a configuration, when the detection result for executing the predetermined function is detected for a certain period of time or more, it can be determined that it is different from a normal operation (normal operation), and the execution of the predetermined function can be suppressed. Thereby, further improvement in the convenience of the user U can be achieved.

[0234] In the embodiment, when the above-described first detection area detects the above-described predetermined operation, a reception function for the apparatus to execute a predetermined function can be assigned. In the above-described second detection area, a predetermined first function and a second function can be selectively assigned. When the first function is assigned to the second detection area and the above-described predetermined operation is detected by the first detection area for a certain period of time or longer, the control unit 82 changes the function assigned to the second detection area to the second function. According to such a configuration, when a detection result for executing the above-described predetermined function is detected for a certain period of time or longer, it is determined that it is different from a normal operation (normal operation), and the function of the second detection area can be changed. Thereby, further improvement in the convenience of the user U can be achieved.

[0235] In the embodiment, the above-described second function is a suppression function for the control unit 82 to suppress the execution of the above-described predetermined function based on the detection result of the second detection area. According to such a configuration, when a detection result for executing the above-described predetermined function is detected for a certain period of time or longer, the function of the second detection area can be changed to a suppression function for suppressing the execution of the above-described predetermined function. Thereby, further improvement in the convenience of the user U can be achieved.

[0236] In the embodiment, when the reception function is assigned to the second detection area, it is more difficult to detect the above-described predetermined operation than in the first detection area. According to such a configuration, a first detection area mainly for receiving the above-described predetermined operation and a second detection area for receiving the above-described predetermined operation supplementarily can be provided, and false detection by the second detection area can be suppressed. Thereby, further improvement in the convenience of the user U can be achieved.

[0237] In the embodiment, when the suppression function is assigned to the second detection area, it is easier to detect the above-described predetermined operation than when the reception function is assigned. According to such a configuration, false detection by the second detection area can be suppressed. Thereby, further improvement in the convenience of the user U can be achieved.

[0238] (Advantages related to door opening timing) In the embodiment, the refrigerator 100 includes a first detection unit capable of detecting a predetermined operation of the user U with respect to the first door, a second detection unit capable of detecting the proximity state of the user U with respect to the first door, a door opening device 60 operable to open the first door, and a control unit 82 for controlling the door opening device 60. After the predetermined operation is detected by the first detection unit, the control unit 82 operates the door opening device 60 based on the change in the detection result of the second detection unit. According to such a configuration, it is possible to avoid performing the door opening operation immediately after a predetermined operation (for example, a touch operation) of the user U with respect to the first door. Thereby, further improvement in the convenience of the user U can be achieved.

[0239] In the embodiment, the control unit 82 operates the door opening device 60 when the detection result of the second detection unit changes to a predetermined state after the predetermined operation is detected by the first detection unit. According to such a configuration, it is possible to perform the door opening operation after waiting for the detection result of the second detection unit to change to a predetermined state. This makes it easier to realize that the user U performs the door opening operation while being separated by a certain distance or more.

[0240] In the embodiment, the control unit 82 operates the door opening device 60 so that the door opening speed of the first door is different based on the length of the elapsed time from when the predetermined operation is detected by the first detection unit until the detection result of the second detection unit changes to a predetermined state. According to such a configuration, the door opening speed can be made slower for the user U with slow movements and faster for the user U with fast movements. From another perspective, the user U can change the opening speed each time without performing a special setting operation by changing the elapsed time until the detection result of the second detection unit changes to a predetermined state by the operation of the user U (for example, deliberately moving away from the refrigerator 100 slowly). This makes it easier to realize that the user U performs the door opening operation while being separated by a certain distance or more.

[0241] In the embodiment, after the predetermined operation is detected by the first detection unit, when the detection result of the second detection unit changes to a predetermined state, the control unit 82 waits for a predetermined time after the change to the predetermined state and then operates the door opening device 60. According to such a configuration, it is possible to perform the door opening operation after securing a greater distance between the refrigerator 100 and the user U. As a result, it becomes easier to realize that the user U performs the door opening operation while being separated by a certain distance or more.

[0242] As a comparative example, consider a configuration in which the proximity sensor measures the distance and invalidates the door opening operation when the user U is within 20 cm to ensure safety. In this case, when a person of short stature wants to open the door or when a person carrying luggage wants to touch the door opening switch with their elbow to open the door, there may be a case where they want to open the door but the invalidation is overly effective and they cannot open the door. From one perspective, in the embodiment, for example, by setting the determination of the proximity state to be smaller than the above distance and providing a waiting time, it is possible to suppress the excessive operation of the invalidation state by the proximity sensor while ensuring safety.

[0243] As described above, several embodiments have been explained. However, the embodiments are not limited to the above examples. For example, the door 20 (the door 20 opened by the door opening device 60) provided with the operation detection unit 50 is not limited to the refrigerator compartment door 20A, and may be the vegetable compartment door 20B, the ice making compartment door 20C, the small freezer compartment door 20D, or the main freezer compartment door 20E. That is, "the refrigerator compartment door 20A" in the description of the above-described embodiment may be read as one or more of the vegetable compartment door 20B, the ice making compartment door 20C, the small freezer compartment door 20D, or the main freezer compartment door 20E.

[0244] In the above-described embodiment, the case where the waiting time Tw is set after the release of the proximity ON state has been explained. Note that the waiting time Tw may be set after the release of the touch ON state (time t53 in FIG. 23), or after the output of the door opening notification (time t54 in FIG. 23), instead of being set after the release of the proximity ON state (time t55 in FIG. 23). Also in these cases, the length of the waiting time Tw may be variously changed as in the above-described embodiment.

[0245] According to at least one embodiment described above, the refrigerator includes a first detection unit capable of detecting a predetermined operation of a user with respect to the first door, a second detection unit capable of detecting the proximity state of the user with respect to the first door, a door opening device operable to open the first door, and a control unit for controlling the door opening device. After the predetermined operation is detected by the first detection unit, the control unit operates the door opening device based on a change in the detection result of the second detection unit. With such a configuration, the convenience can be improved.

[0246] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

Explanation of Reference Numerals

[0247] 10... housing, 11... storage chamber, 11A... refrigerating chamber, 11B... vegetable chamber, 11C... ice making chamber, 11D... small freezing chamber, 11E... main freezing chamber, 20... door, 20A... refrigerating chamber door, 20Aa... left refrigerating chamber door, 20Ab... right refrigerating chamber door, 20B... vegetable chamber door, 20C... ice making chamber door, 20D... small freezing chamber door, 20E... main freezing chamber door, 50... operation detection unit, 50A... left door operation detection unit, 50B... right door operation detection unit, 51... central detection area, 52... intermediate detection area, 53... peripheral detection area, 54... light emitting unit, 55... sensor control unit, 57... infrared sensor, 60... door opening device, 60A... left door opening device, 60B... right door opening device, 80... control device, 82... control unit.

Claims

1. A housing including a first storage chamber, a first door capable of closing the opening of the first storage chamber, a first detection unit capable of detecting a predetermined operation of a user on the first door, a second detection unit capable of detecting the proximity state of the user to the first door, a door opening device operable to open the first door, a control unit for controlling the door opening device, and comprising after the predetermined operation is detected by the first detection unit, the control unit operates the door opening device based on a change in the detection result of the second detection unit. A refrigerator.

2. After the predetermined operation is detected by the first detection unit, the control unit operates the door opening device when the detection result of the second detection unit changes to a predetermined state. The refrigerator according to Claim 1.

3. Based on the length of the elapsed time from when the predetermined operation is detected by the first detection unit until the detection result of the second detection unit changes to a predetermined state, the control unit operates the door opening device so that the door opening speed of the first door is different. The refrigerator according to Claim 1 or Claim 2.

4. After the predetermined operation is detected by the first detection unit, when the detection result of the second detection unit changes to a predetermined state, the control unit waits for a predetermined time after the change to the predetermined state and then operates the door opening device. The refrigerator according to Claim 1 or Claim 2.

5. Based on the length of the elapsed time from when the predetermined operation is detected by the first detection unit until the detection result of the second detection unit changes to the predetermined state, the control unit changes the length of the predetermined time. The refrigerator according to Claim 4.

6. The refrigerator has a second door different from the first door, when the second door is in a closed state, the control unit applies a first predetermined time as the predetermined time, and when the second door is in an open state, the control unit applies a second predetermined time different from the first predetermined time as the predetermined time. The refrigerator according to Claim 4.

7. The second door is a door capable of closing the opening of the first storage chamber together with the first door, the dimension of the second door is larger than the dimension of the first door, the second predetermined time is shorter than the first predetermined time. The refrigerator according to Claim 6.

8. The second door is a door capable of closing the opening of the first storage chamber together with the first door, the dimension of the second door is smaller than the dimension of the first door, the second predetermined time is longer than the first predetermined time. The refrigerator according to Claim 6.

9. The second door is a door that can close the opening of the first storage chamber together with the first door. The housing has a second storage chamber. The refrigerator has a third door that can close the opening of the second storage chamber. When the third door is open, the control unit applies a third predetermined time as the predetermined time. The refrigerator according to claim 6.

10. The housing has a second storage chamber. The second door can close the opening of the second storage chamber. The second predetermined time is shorter than the first predetermined time. The refrigerator according to claim 6.

11. The housing has a second storage chamber and a third storage chamber disposed on the side opposite to the first storage chamber with respect to the second storage chamber. The refrigerator has a second door that can close the opening of the second storage chamber and a third door that can close the opening of the third storage chamber. When the second door is open, the control unit applies a fourth predetermined time as the predetermined time, and when the third door is open, the control unit applies a fifth predetermined time that is longer than the fourth predetermined time as the predetermined time. The refrigerator according to claim 4.

12. The housing has a second storage chamber and a third storage chamber disposed on the side opposite to the first storage chamber with respect to the second storage chamber. The refrigerator has a second door that can close the opening of the second storage chamber and a third door that can close the opening of the third storage chamber. When the second door is open, the control unit applies a fourth predetermined time as the predetermined time, and when the third door is open, the control unit applies a fifth predetermined time as the predetermined time. The lengths of the fourth predetermined time and the fifth predetermined time can be changed based on a user's setting operation. The refrigerator according to claim 4.

13. The housing has a second storage chamber. The refrigerator has a second door that can close the opening of the second storage chamber. The control unit When the second door is closed, after the predetermined operation is detected by the first detection unit, when the detection result of the second detection unit changes to a predetermined state, the door opening device is operated. When the second door is open, after the predetermined operation is detected by the first detection unit, when the detection result of the second detection unit changes to the predetermined state, the door opening device is operated after waiting for a predetermined time after the change to the predetermined state. The refrigerator according to claim 1 or claim 2.

14. After the control unit detects the predetermined operation by the first detection unit, if the first detection unit detects the predetermined operation again before the detection result of the second detection unit changes to a predetermined state, the control unit suppresses the operation of the door opening device even if the detection result of the second detection unit changes to the predetermined state. The refrigerator according to claim 1 or claim 2.

15. The control unit After the predetermined operation is detected by the first detection unit, when the detection result of the second detection unit changes to a predetermined state, the control unit waits for a predetermined time after the change to the predetermined state and then operates the door opening device. If it is detected by the second detection unit that the user approaches the first door again during the predetermined time, the control unit suppresses the operation of the door opening device. The refrigerator according to claim 1 or claim 2.

16. If the elapsed time from when the first detection unit detects the predetermined operation until the detection result of the second detection unit changes to a predetermined state exceeds a threshold time, the control unit suppresses the operation of the door opening device. The refrigerator according to claim 1 or claim 2.

17. A housing including a first storage chamber, A first door capable of closing the opening of the first storage chamber, A second door different from the first door, A detection unit capable of detecting a predetermined operation of the user with respect to the first door, A door opening device operable to open the first door, A control unit for controlling the door opening device, Comprising When the detection unit detects the predetermined operation, the control unit operates the door opening device based on the opening / closing state of the second door. Refrigerator

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