WO2012117724A1 - 冷蔵庫 - Google Patents
冷蔵庫 Download PDFInfo
- Publication number
- WO2012117724A1 WO2012117724A1 PCT/JP2012/001375 JP2012001375W WO2012117724A1 WO 2012117724 A1 WO2012117724 A1 WO 2012117724A1 JP 2012001375 W JP2012001375 W JP 2012001375W WO 2012117724 A1 WO2012117724 A1 WO 2012117724A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- storage
- refrigerator
- optical sensor
- light
- door
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D27/00—Lighting arrangements
- F25D27/005—Lighting arrangements combined with control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/06—Sensors detecting the presence of a product
Definitions
- This invention relates to the refrigerator provided with the means to detect the storage state of the storage thing in a store
- a refrigerator provided with a movable cold air discharge device is known as a refrigerator that keeps the inside temperature uniform (see, for example, Patent Document 1).
- FIG. 26 is a front view showing the internal structure of the refrigerator compartment 101 of the conventional refrigerator 500.
- the movable cold air discharge device 102 provided in the refrigerator compartment 101 supplies cold air to the left and right. Thereby, the inside temperature is made uniform.
- the temperature is estimated by a thermistor in the cabinet.
- the present invention has been made in view of the above-described conventional problems, and provides a refrigerator capable of cooling according to the storage state of the stored items inside the refrigerator.
- the refrigerator according to the present invention is partitioned by a heat insulating wall and a heat insulating door, and stores a storage room, a light source installed inside the storage room, a light sensor that detects irradiation light emitted from the light source, a light An arithmetic control unit that performs arithmetic processing based on the detection result of the sensor.
- the calculation control unit calculates an attenuation rate from the reference storage room illuminance in the state in which the stored item is stored based on the reference storage room illuminance in a state in which there is no storage in the storage room and the detected illuminance of the optical sensor.
- a storage state estimation unit that estimates the storage amount of the storage item based on the calculation result of the attenuation rate calculation unit.
- FIG. 1 is a front view of the refrigerator in the first embodiment of the present invention.
- FIG. 2 is a control block diagram of the refrigerator in the first embodiment of the present invention.
- 3A is a cross-sectional view of the refrigerator 3A-3A in FIG. 1 according to the first embodiment of the present invention.
- FIG. 3B is a front view when the refrigerator compartment door of the refrigerator compartment of the refrigerator according to the first embodiment of the present invention is opened.
- FIG. 4 is a diagram showing the characteristics of illuminance and output current of the optical sensor which is the storage state detection unit of the refrigerator in the first embodiment of the present invention.
- FIG. 5 is a characteristic diagram showing the relationship between the storage rate of the refrigerator and the illuminance at the optical sensor in the first embodiment of the present invention for each reflectance of the inner wall surface.
- FIG. 6 is a characteristic diagram showing the relationship between the storage rate of the refrigerator and the illuminance at the optical sensor in the first embodiment of the present invention for each transmittance of the storage shelf in the cabinet.
- FIG. 7A is a flowchart showing a control flow of an operation for detecting the storage state of the refrigerator in the first embodiment of the present invention.
- FIG. 7B is a flowchart showing a control flow of an operation for detecting the storage state of the refrigerator in the first embodiment of the present invention.
- FIG. 8 is a diagram for explaining an operation of detecting the storage state using the top LED of the refrigerator in the first embodiment of the present invention.
- FIG. 9 is a diagram showing characteristics when the storage state is detected using the top LED of the refrigerator in the first embodiment of the present invention.
- FIG. 10 is a diagram for explaining an operation of detecting the storage state using the lower side LED of the refrigerator according to the first embodiment of the present invention.
- FIG. 11 is a diagram illustrating characteristics when the storage state is detected using the lower side LED of the refrigerator according to the first embodiment of the present invention.
- FIG. 12 is a diagram showing characteristics obtained by averaging the values of the characteristics shown in FIGS. 9 and 11 in the refrigerator according to the first embodiment of the present invention.
- FIG. 13 is a diagram for explaining an example of storage in the vicinity of the main light sensor of the refrigerator in the first embodiment of the present invention.
- FIG. 14 is a diagram for explaining an example of the occurrence of an error due to the stored items in the vicinity of the main light sensor of the refrigerator in the first embodiment of the present invention.
- FIG. 15 is a diagram illustrating a storage state detection characteristic in the vicinity of the main light sensor in the refrigerator according to the first embodiment of the present invention.
- FIG. 16 is a diagram for explaining an example of storing the reflecting object in the vicinity of the main light sensor of the refrigerator in the first embodiment of the present invention.
- FIG. 17 is a diagram for explaining an error generation example due to a reflector near the main light sensor of the refrigerator according to the first embodiment of the present invention.
- FIG. 18A is a diagram showing a relationship between the wavelength of light and the reflectance in the refrigerator according to the first embodiment of the present invention.
- FIG. 18B is a diagram showing a relationship between the wavelength of light and the reflectance in the refrigerator according to the first embodiment of the present invention.
- FIG. 18C is a diagram showing a relationship between the wavelength of light and the reflectance in the refrigerator according to the first embodiment of the present invention.
- FIG. 19 is a diagram illustrating the reflection object detection characteristics near the main light sensor of the refrigerator in the first embodiment of the present invention.
- FIG. 20 is a storage state detection characteristic diagram after the correction calculation according to the first embodiment of the present invention.
- FIG. 21 is a cross-sectional view seen from the side of the refrigerator in the second embodiment of the present invention.
- FIG. 22 is a diagram for explaining a state in which stored items are stored in the back of the refrigerator compartment of the refrigerator according to the second embodiment of the present invention.
- FIG. 23A is a cross-sectional view seen from above showing an optical sensor arrangement example of the refrigerator in the second embodiment of the present invention.
- FIG. 23B is a cross-sectional view seen from above showing an example of optical sensor arrangement in the refrigerator according to the second embodiment of the present invention.
- FIG. 24A is a cross-sectional view seen from the side showing an arrangement example of the photosensors of the refrigerator in the second embodiment of the present invention.
- FIG. 24B is a cross-sectional view seen from the side showing an arrangement example of the photosensors of the refrigerator according to the second embodiment of the present invention.
- FIG. 25 is a cross-sectional view seen from above showing an arrangement example of optical sensors in the air passage in the refrigerator according to the second embodiment of the present invention.
- FIG. 26 is a front view showing the internal structure of the refrigerator compartment of a conventional refrigerator.
- FIG. 1 is a front view of the refrigerator 100 according to the first embodiment of the present invention.
- FIG. 2 is a control block diagram of the refrigerator 100.
- 3A is a cross-sectional view of the refrigerator 100 taken along 3A-3A in FIG. 3B is a front view when the refrigerator compartment door 12a of the refrigerator compartment 12 of the refrigerator 100 is opened.
- the refrigerator 100 includes a refrigerator body 11.
- the refrigerator body 11 is a heat insulating box, and is mainly composed of an outer box using a steel plate, an inner box formed of a resin such as ABS, and a heat insulating material injected between the outer box and the inner box. Yes.
- the refrigerator body 11 is partitioned into a plurality of storage rooms by a heat insulating wall and a heat insulating door.
- a refrigerator compartment 12 is disposed at the top of the refrigerator body 11.
- an ice making chamber 13 and a switching chamber 14 are provided side by side in the lower portion of the refrigerator compartment 12.
- a freezing room 15 is provided below the ice making room 13 and the switching room 14.
- a vegetable compartment 16 is disposed at the bottom of the refrigerator body 11 and below the freezer compartment 15.
- a heat insulating door for partitioning from the outside air is formed in the front opening of the refrigerator main body 11 at the front of each storage room.
- the refrigerator compartment door 12 a is a heat insulating door of the refrigerator compartment 12. In the vicinity of the center of the refrigerator compartment door 12a, it is possible to make settings such as internal temperature setting, ice making, and rapid cooling of each storage room, and display the detection result of the storage state, the operation status of the refrigerator 100, and the like.
- a display unit 17 is arranged.
- the refrigerator 100 includes an interior lighting 20 that is a light source installed inside the refrigerator compartment 12, an optical sensor 21 that detects irradiation light emitted from the light source, and detection of the optical sensor 21. And an arithmetic control unit 1 that performs arithmetic processing based on the result.
- the refrigerator 100 further includes blue LEDs 22a and 22b.
- the calculation control unit 1 calculates an attenuation rate from the reference storage room illuminance in the state in which the stored items are stored based on the reference storage room illuminance in the state where there is no stored item in the refrigerator compartment 12 and the detected illuminance of the optical sensor 21. And a storage state estimation unit 82 that estimates the storage amount of the stored items based on the calculation result of the attenuation rate calculation unit 81.
- the refrigerator 100 further includes a door opening / closing detection sensor 3 that is a door opening / closing detection unit that detects opening / closing of the refrigerator compartment door 12a.
- the interior lighting 20 has top LEDs 20a and 20b, lighting LEDs 20c to 20f, and side lower LEDs 20g and 20h.
- the arithmetic control unit 1 further includes a memory 2 and a timer 4.
- the optical sensor 21 includes main optical sensors 21a and 21c and a sub optical sensor 21b.
- the refrigerator 100 includes a cooling system 35.
- the cooling system 35 includes a compressor 30, a cooling fan 31, and an air volume adjustment damper 32.
- a plurality of storage shelves 18 are provided in the refrigerator compartment 12 so that foods that are stored items can be organized and stored.
- the door storage shelf 19 is provided in the surface inside the refrigerator compartment door 12a.
- the internal storage shelf 18 and the door storage shelf 19 are made of a material having high light transmittance such as glass or transparent resin.
- the surfaces of the interior storage shelf 18 and the door storage shelf 19 are processed so that light diffuses while maintaining a certain transmittance. Thereby, it is possible to adjust the brightness distribution in the refrigerator compartment 12.
- the transmittance at this time is desirably 50% or more, and when the transmittance is lower than 50%, there is a place where it is difficult for light to reach the inside of the cabinet, so that the detection accuracy of the storage state may be lowered.
- the transmittance of the storage shelf 18 and the door storage shelf 19 is 70% or more. The reason for this will be described later.
- FIG. 3A and FIG. 3B inside the refrigerator compartment 12 is provided with interior lighting 20 in order to illuminate the interior of the storage room. Thereby, the visibility of the foodstuff etc. which are the stored goods is improved.
- the interior lighting 20 is disposed on the door side (front side) rather than 1/2 (center) of the interior depth when viewed from the front (front) on the door opening side in the refrigerator 100. ing.
- the interior lighting 20 is arranged on the top surface, the left wall surface, and the right wall surface, respectively, as shown in FIG. 3B.
- a plurality of LEDs are used such as the top LEDs 20a and 20b on the top surface, the lighting LEDs 20c to 20f on the right and left wall surfaces, and the lower side LEDs 20g and 20h, respectively.
- high-luminance light enters the optical sensor 21, so that the detection sensitivity of the storage state by the optical sensor 21 can be increased.
- the detection value of the optical sensor 21 changes depending on the housed state and the LED to be lit, so that the housed state can be estimated in more detail.
- the LED of the interior lighting 20 is disposed above the optical sensor 21 in the refrigerator compartment 12.
- the lighting LEDs 20c to 20f and the side lower LED 20g are arranged in the vertical direction as shown in FIGS. 3A and 3B. Thereby, the whole refrigerator compartment 12 longer in the height direction than the width direction can be irradiated uniformly.
- the main light sensors 21a and 21c and the sub light sensor 21b, which are the light sensors 21, are located below the interior of the chamber and at a position closer to the refrigerator compartment door 12a than 1/2 (center) in the depth direction in the chamber. is set up. Thereby, it is possible to accurately detect the storage state of storage items such as food near the entrance that is easily affected by the inflow of outside air due to the opening and closing of the door, and control the interior to be kept at an appropriate temperature.
- an illuminance sensor specifically, a sensor with a peak wavelength of 500 to 600 nm that provides the highest sensitivity is used in the present embodiment. It should be noted that the peak wavelength that provides the highest sensitivity of these optical sensors may be in other wavelength bands, and detects the emission wavelengths of the light sources of the top LED 20a and 20b, the side LED 20g and 20h, and the blue LEDs 22a and 22b. Determined to be able to.
- the top LED 20a and the main light sensor 21c are arranged in the right section. Further, the top LED 20b, the main light sensor 21a, and the sub light sensor 21b are arranged in the left section toward the left. Further, assuming that the refrigerator compartment 12 is divided into two sections in the vertical direction, the top LEDs 20a and 20b are arranged in the upper section. Further, the lower side LEDs 20g and 20h, the main light sensors 21a and 21c, and the sub light sensor 21b are arranged in the lower section. As described above, the LEDs and the optical sensors 21 constituting the storage state detection unit are arranged in a plurality of sections. The detected illuminance by the optical sensor 21 is illuminance obtained by detecting indirect irradiation light including reflected light from the wall surface and stored items in the refrigerator compartment 12.
- the light emitted from the top LEDs 20a and 20b or the lower side LEDs 20g and 20h repeatedly reflects on the wall surface of the refrigerator compartment 12 and is reflected and attenuated by the stored items. Measure the illuminance when the distribution of is saturated.
- the arithmetic control unit 1 performs arithmetic processing using the measured values of the main light sensors 21a and 21c to estimate the storage state of the storage items.
- the LED and the optical sensor 21 are arranged in the plurality of sections, so that the storage state can be detected with high accuracy regardless of the arrangement of the storage items.
- the reflectance of the wall surface of the refrigerator compartment 12 be 0.5 or more.
- the transmittances of the internal storage shelf 18 and the door storage shelf 19 are 70% or more, respectively.
- FIG. 4 is a diagram showing the characteristics of illuminance and output current of the optical sensor 21 constituting the storage state detection unit of the refrigerator 100 according to the first embodiment of the present invention.
- FIG. 5 is a characteristic diagram showing the relationship between the storage rate of the refrigerator 100 and the illuminance at the optical sensor 21 for each reflectance of the inner wall surface.
- FIG. 6 is a characteristic diagram showing the relationship between the storage rate of the refrigerator 100 and the illuminance at the optical sensor 21 for each transmittance of the storage shelf 18.
- the illuminance of the optical sensor 21 can be output as a current value or a voltage value (hereinafter described as a current value, but can be replaced with a voltage value).
- the inner box constituting the inner wall of the refrigerator compartment 12 of the refrigerator 100 is formed by vacuum forming white ABS resin, and the reflectance R of the inner wall surface is 0.5 or more.
- the reflectance R is defined by the ratio of the light beam reflected on this surface to the light beam incident on a certain surface, and it can be said that the larger the numerical value, the easier it is to reflect. Measurement is possible with a commercially available spectrophotometer. Some devices can measure the transmittance T simultaneously with the reflectance R. In addition, in the Japanese Industrial Standard, the measurement and test method of the reflectance R is defined by JIS-K3106 and the like. The reflectance R can also be estimated from the luminance of a sample (gray scale) with a known reflectance measured using a luminance meter.
- the transmittance T is a ratio of incident light having a specific wavelength passing through the sample, and it can be said that the larger the numerical value, the easier the light is transmitted.
- the measurement and test methods are defined in JIS-K7361-1.
- the internal storage shelf 18 disposed inside the refrigerator compartment 12 of the refrigerator 100 is made of polystyrene or glass, and the door storage shelf 19 is made of polystyrene.
- permeability T of the storage shelf 18 and the door storage shelf 19 is 70% or more, respectively. Note that the material is not limited to these examples as long as the transmittance satisfies the above relationship.
- the illuminance at the main light sensors 21a and 21c and the output current value at that time have a linear relationship, and the higher the illuminance, the larger the output current value.
- the output current value also decreases.
- the output current value at this time is 0.1 ⁇ A in the storage state detection unit of the present embodiment, but the relationship between the illuminance and the output current value differs depending on the specification of the storage state detection unit.
- the accuracy of the sensor for detecting the illuminance is reduced below 1 lux, but in the present embodiment, the minimum required illuminance is set to 0.5 lux or more assuming the optical sensor 21 having relatively good performance.
- the calculation control unit 1 estimates the storage rate of the storage object at a predetermined value (0.5 lux) or more having a linear relationship between the illuminance at the optical sensor 21 and the output current value, thereby storing the storage rate.
- the estimation accuracy can be improved.
- the optical sensor 21 has a predetermined output value. In the case of (0.5 lux) or less, it can also be used for failure diagnosis.
- the minimum illuminance is 0.1 ⁇ A when converted into the output current value. That is, in the present embodiment, the minimum output current of the main light sensors 21a and 21c is set to 0.1 ⁇ A or more. Thereby, from the viewpoint of the minimum output current, it is possible to improve the estimation accuracy of the storage state of the stored item based on the illuminance attenuation amount in the main light sensors 21a and 21c.
- the amount of light reaching the main light sensors 21a and 21c depends on the reflectance R of the inner wall surface having a large area.
- the minimum illuminance of the main light sensors 21a and 21c is required to be 0.5 lux or more, it can be seen from the relationship shown in FIG. 5 that the reflectance R of the inner wall surface needs to be 0.5 or more.
- the light source has the lowest illuminance on the storage shelf 18 when the illuminance is measured in a dark room with the interior of the compartment empty and with the refrigerator compartment door 12a opened.
- the LED is adjusted to be 100 lux or less at the place.
- the illuminance of 100 lux or less at this time is the brightness as viewed from the user side.
- the axis with the highest sensitivity in the sensing unit of a general illuminometer is placed horizontally with the storage shelf 18 in the cabinet. And it installed and measured toward the refrigerator compartment door 12a side.
- an LED having a luminous intensity per unit of 20 candela or less is used as the light source of the interior lighting 20 in consideration of the thermal effect on the interior.
- the LED as the storage state detection unit is configured by using a dedicated light source without using the illumination function of the interior lighting 20 together, the case where the light intensity of the LED of the storage state detection unit is relatively low.
- the transmittances of the storage shelf 18 and the door storage shelf 19 to 70% or more, respectively, the estimation accuracy of the storage state of the stored items based on the illuminance attenuation amount by the optical sensor 21 is ensured. be able to.
- a method of detecting an object using the optical sensor 21 a method using a phenomenon in which the intensity of light is extremely attenuated by shielding, such as a photo interrupter, is generally used. According to this method, the presence of a single object can be detected digitally using a single optical sensor 21, and the presence of a plurality of objects can be detected using a large number of optical sensors.
- a configuration it is only possible to detect the presence or absence of stored items in a limited place in the storage chamber, and it is difficult to grasp the storage state of the entire storage chamber.
- the entire storage state in the space called the refrigerator compartment 12 is analog, that is, not only the presence or absence of storage items, The amount can also be grasped quantitatively. That is, the configuration of the refrigerator 100 according to the present embodiment is suitable for detecting the entire amount of stored items in the closed space.
- the level of light that can be detected decreases extremely, and the light intensity The rate of change of decreases. For this reason, it is considered that complicated processing is required for detection of the storage state.
- the top LEDs 20a and 20b, the lighting LEDs 20c to 20f, the side lower LEDs 20g and 20h, and the main light sensors 21a and 21c are connected to the inside storage shelf 18. It is attached to a space ⁇ between the door storage shelf 19. For this reason, even if the inside of the refrigerator compartment 12 is filled with stored items, the possibility that the vicinity of the optical sensor 21 is blocked with food is low. As a result, the upper and lower spaces between the heat insulating door and the front end of the storage shelf 18 are unlikely to be blocked by the storage items, and a stable light path from the light source is secured, while the door storage shelf 19 and the interior of the storage shelf 18 are stored. It is possible to accurately estimate the storage state of the stored item based on the illuminance attenuation amount by the optical sensor 21 due to the presence of the stored item in the storage shelf 18.
- the main light sensors 21a and 21b are located on the front side of the vertical surface including the front end portion of the storage cabinet 18 and on the vertical side including the rear end portion of the refrigerator compartment door 12a which is a heat insulating door. It is installed between the surfaces. More preferably, the main light sensors 21a and 21b are provided on the front side of the vertical surface including the front side end of the storage cabinet 18 and the rear side end of the refrigerator compartment door 12a which is a heat insulating door. It is installed in the part (alpha) which is between the containing vertical surfaces and does not cover the door storage shelf 19. FIG. Thereby, since there is a space between the storage shelf 18 and the door storage shelf 19, it is possible to prevent the main light sensors 21a and 21c constituting the storage state detection unit from being blocked by the storage items.
- the machine room formed in the uppermost rear region in the refrigerator compartment 12 contains the components of the refrigeration cycle including the compressor 30 such as a dryer for removing moisture.
- a cooling chamber for generating cool air is provided on the back of the freezing chamber 15.
- a cooling device 31 and a cooling fan 31 for blowing cold air, which is cooling means cooled by the cooling device, to the refrigerating chamber 12, the switching chamber 14, the ice making chamber 13, the vegetable chamber 16, and the freezing chamber 15 )
- an air volume adjustment damper 32 for adjusting the air volume from the cooling fan 31 is installed in the air path.
- a radiant heater, a drain pan, a drain tube evaporating dish, and the like are arranged to defrost frost and ice adhering to the cooler and its surroundings.
- the calculation control unit 1 performs temperature control (usually 1 ° C. to 5 ° C.) with the lower limit of the temperature at which the refrigeration room 12 is not frozen for refrigerated storage.
- the arithmetic control unit 1 controls the temperature of the vegetable compartment 16 to a temperature setting (for example, 2 ° C. to 7 ° C.) that is the same as or slightly higher than that of the refrigerator compartment 12.
- the arithmetic control unit 1 sets the freezing room 15 in a freezing temperature zone (usually ⁇ 22 ° C. to ⁇ 15 ° C.). However, in order to improve the frozen storage state, for example, a low temperature of ⁇ 30 ° C. or ⁇ 25 ° C. It may be set to.
- the ice making room 13 creates ice using an automatic ice maker provided in the upper part of the room with water sent from a water storage tank in the refrigerator compartment 12, and stores the ice in an ice storage container disposed in the lower part of the room.
- the switching chamber 14 has a temperature range of 1 ° C. to 5 ° C. (refrigerated), a temperature range of 2 ° C. to 7 ° C. (vegetable), and a temperature range of ⁇ 22 ° C. to ⁇ 15 ° C. (frozen). Can be switched to a preset temperature range from the freezing temperature range to the freezing temperature range.
- the switching chamber 14 is a storage chamber provided with an independent door, which is provided in parallel with the ice making chamber 13, and includes, for example, a drawer-type door.
- the switching chamber 14 is a storage chamber that can be adjusted in a temperature range from a refrigeration temperature range to a freezing temperature range.
- the switching chamber 14 is not limited to this configuration, and the refrigeration chamber 12 or the vegetable chamber 16 is refrigerated and the refrigeration chamber 15 is refrigerated. It can also be a storage room. Further, the switching chamber 14 may be a storage chamber fixed to a freezing setting in accordance with a recent increase in demand for frozen food, for example, in a specific temperature range.
- the storage state of the storage items is detected using the top surface LEDs 20a and 20b and the side surface lower LEDs 20g and 20h in the interior lighting 20. Moreover, in this Embodiment, the storage state is detected using the main optical sensor 21a and the sub optical sensor 21b among the optical sensors 21. FIG.
- the number of LED light sources to be used may be increased, such as using the lighting LEDs 20c to 20f as the stored state detecting unit.
- the detection accuracy can be increased by increasing the number of optical sensors 21 to be used, such as using the main optical sensor 21c as the storage state detection unit.
- FIG. 7A and 7B are flowcharts showing a control flow of an operation for detecting the storage state of the refrigerator 100 in the first embodiment of the present invention.
- FIG. 8 is a diagram for explaining an operation of detecting the storage state using the top LEDs 20a and 20b of the refrigerator 100.
- FIG. 9 is a diagram illustrating characteristics when the storage state is detected using the top LEDs 20a and 20b of the refrigerator 100.
- FIG. 10 is a diagram for explaining an operation of detecting the storage state using the side surface lower LED 20 g of the refrigerator 100.
- FIG. 11 is a diagram illustrating characteristics when the storage state is detected using the LED 20g on the lower side surface of the refrigerator 100.
- FIG. 12 is a diagram showing characteristics obtained by averaging the values of the characteristics shown in FIGS. 9 and 11 in the refrigerator 100.
- the refrigerator compartment 12 is generally longer in the height direction than the width direction (vertically long shape). For this reason, the example which divides the refrigerator compartment 12 into two upper and lower divisions and detects a storage state is demonstrated.
- opening / closing of the refrigerator compartment door 12a is detected by the door opening / closing detection sensor 3 (S101).
- the arithmetic control unit 1 determines that there is a possibility that a stored item has been taken in and out, and starts arithmetic processing.
- the arithmetic control unit 1 can also start the storage state detection operation (basic data acquisition operation) after measuring the predetermined time with the timer 4 after the refrigerator compartment door 12a is closed (S102). In this case, the arithmetic control unit 1 starts control after the door open / close detection sensor 3 detects the closed state of the heat insulating door and a predetermined time has elapsed.
- step S102 the reason why the timer 4 measures the predetermined time (reason for waiting for the predetermined time) in step S102 will be described.
- One is to prevent the storage state detection from being affected by minute condensation on the surfaces of the storage shelf 18 and the door storage shelf 19 that are at a low temperature, and the transmittance changing. That is, it is for detecting the storage state after the condensation is eliminated after a predetermined time.
- the other is to turn on the interior lighting 20 as lighting when the refrigerator door 12a is open, but to prevent the detection of the storage state from being affected by the decrease in the luminous intensity of the LED due to the heat generation. That is, when the door is closed, the LED is turned off, and after the temperature rise of the LED is resolved after a predetermined time, the LED is turned on again to detect the storage state.
- the system waits for a predetermined time in order to stabilize the illuminance in the storage room.
- the LED is lit for a while after the refrigerator compartment door 12a is closed to generate heat, and after a predetermined time, the temperature rise of the LED is saturated and becomes constant. There is also a method for starting the detection after this. Also by this method, the luminous intensity of the LED can be stabilized.
- the calculation control part 1 will light the light source of top
- the light 24a output from the top LED 20a (the light component is indicated by an arrow in FIG. 8; the dotted line indicates that the light intensity is attenuated) is reflected by the stored object 23a and attenuated, and the light It diffuses in another direction like 24b and 24c.
- light 24b, 24c repeats reflection in the wall surface of the refrigerator compartment 12, another foodstuff, etc. further.
- the light 24d reflected by the stored item 23b of the door storage shelf 19 is also attenuated, diffuses in another direction like the light 24e, and is repeatedly reflected on the wall surface of the refrigerator compartment 12 and other stored items such as food. After repeating reflection in this way, the distribution of brightness in the refrigerator compartment 12 is saturated and stabilized.
- the irradiation light of the LED emits light at a predetermined irradiation angle.
- the lights 24a and 24d indicated by arrows in FIG. 8 are part of the light components emitted by the LEDs. The same applies to the description of light.
- the optical axes of the top LEDs 20a and 20b are directed vertically downward, the detection directions of the main light sensors 21a and 21c are directed horizontally, and are not opposed to each other. For this reason, most of the light components generated from the top LEDs 20a and 20b do not directly enter the main light sensors 21a and 21c, but light reflected by the wall surfaces and the stored items enter the main light sensors 21a and 21c. It is configured.
- the main light sensors 21a and 21c may be arranged at positions shifted from the optical axes of the top LEDs 20a and 20b serving as light sources. That is, since the LED has high directivity, it is desirable to arrange the main light sensors 21a and 21c at positions where the light from the top LEDs 20a and 20b does not enter directly or so as not to enter.
- FIG. 9 shows an example of the storage state detection characteristic detected by the main light sensor 21a at this time.
- the illuminance decreases as the storage amount increases.
- the maximum value when the stored item is biased downward
- the minimum value when the stored item is biased downward
- An error CEA occurs with MICA (when the object is biased upward). For this reason, it is necessary to correct this error CEA. The correction method will be described later.
- the arithmetic control unit 1 records the measured illuminance information as detection data A in the memory 2 (S104).
- the vertical axis of the graph is “illuminance”, but relative values such as “relative illuminance” or “illuminance attenuation rate” with reference to the standard storage room illuminance when there is no storage can be used. it can.
- the attenuation rate calculation unit 81 of the calculation control unit 1 determines the reference storage room illuminance in the state in which the stored item is stored based on the reference storage room illuminance in the state in which there is no storage in the storage room and the detected illuminance of the optical sensor 21. Calculate the decay rate from. In this case, it is easy to deal with variations in luminous intensity and the like that the LED has as initial characteristics.
- the vertical axis may be an “illuminance attenuation amount” based on the reference storage room illuminance when there is no stored item.
- the concept regarding “illuminance” is the same.
- the top LEDs 20a and 20b can be adjusted by the arithmetic control unit 1 so that the detected illuminance of the optical sensor 21 in a state where there is no stored item in the storage room becomes a predetermined value.
- the illuminance adjustment of the top LEDs 20a and 20b is executed before the refrigerator 100 is used by the user. Thereby, each illumination intensity dispersion
- the output value based on the detected illuminance of the optical sensor 21 is a current value or a voltage value, and the attenuation rate (%) is calculated by comparing the output values.
- the correlation data between the illuminance attenuation rate and the storage amount is obtained experimentally in advance for each of different forms such as the capacity, width, and height of the refrigerator 100 and is built in the arithmetic control unit 1.
- a plurality of correlation data is held corresponding to each of the plurality of light sources.
- the detected illuminance of the optical sensor 21 is a value read after a predetermined time (for example, 2 seconds) after the top LEDs 20a and 20b are turned on. In addition, it is good also considering the average value of the time when top LED20a, 20b is lighting as detection illumination intensity.
- the arithmetic control unit 1 turns on the side lower LED 20g disposed on the side lower wall of the refrigerator 100 (S105).
- the side lower LED 20g disposed on the side lower wall of the refrigerator 100
- stored items 23c and 23d for example, food
- the light 24f output from the LED 20g is reflected by the storage 23c and attenuated, and the light 24g To spread in another direction.
- the light 24g further repeats reflection on the wall surface of the refrigerator compartment 12 and other stored items.
- the light 24h reflected by the stored item 23d is also attenuated, diffused in another direction like the light 24i and 24j, and further reflected by the wall surface of the refrigerator compartment 12 and other stored items. After repeating reflection in this way, the distribution of brightness in the refrigerator compartment 12 is saturated and stabilized.
- At least one of the side lower LEDs 20g and 20h may be turned on in accordance with the required detection accuracy.
- the side lower LED 20g When the side lower LED 20g is turned on, detection is performed by the main light sensor 21a.
- the side lower LED 20g and the main light sensor 21a are attached to the same wall surface (FIGS. 3A and 3B), and thus do not face each other. Since detection is performed in such a combination, most of the light components from the side lower LED 20g do not directly enter the main light sensor 21a, but enter through the reflection on the wall surface or the stored item. Thereby, indirect irradiation light including the reflected light in the stored item in the storage chamber can be detected.
- FIG. 11 shows an example of the storage state detection characteristic by the main light sensor 21a at this time.
- the illuminance decreases as the storage amount increases.
- the maximum value when the storage item is biased upward
- the minimum value when the storage amount is the same.
- There is an error CEB with MICB when the object is biased downward. Therefore, it is necessary to correct this error CEB.
- the correction method will be described later. As a result, it is possible to reduce the variation factor due to the bias of the storage items in the storage chamber, and it is possible to improve the estimation accuracy of the storage amount due to the storage state of the storage items.
- the arithmetic control unit 1 records the measured illuminance information as detection data B in the memory 2 (S106).
- the illumination attenuation due to the increase in the storage amount is large when the top LEDs 20a and 20b are turned on (FIG. 9), and the increase in the storage amount when the side lower LED 20g is turned on. Illuminance attenuation is small (FIG. 11).
- the illumination attenuation due to the increase in the storage amount is small when the top LEDs 20a and 20b are turned on (FIG. 9), and the illumination attenuation due to the increase in the storage amount is large when the LED 20g below the side surface is turned on. (FIG. 11).
- the storage state of the stored item is detected by combining the measurement results obtained by sequentially lighting the top LED 20a, 20b in the upper section and the lower side LED 20g in the lower section.
- the arithmetic control unit 1 calculates, for example, a value obtained by averaging the detection data A (characteristic shown in FIG. 9) and the detection data B (characteristic shown in FIG. 11) as the detection data C (S107).
- FIG. 12 shows the storage state detection characteristics of the detection data C, that is, the maximum value MACC after averaging and the minimum value MICC after averaging. Comparing FIG. 12 with FIG. 9 and FIG.
- the calculation control unit 1 functions as an attenuation rate calculation correction unit that corrects the reference data of the attenuation rate calculation unit 81 based on the storage state of the storage items in the vertical direction in the storage chamber. Accordingly, it is possible to reliably increase the estimation accuracy of the storage amount due to the vertical deviation of the storage items.
- the refrigerator compartment 12 is divided into two sections in each direction based on the same idea as described above, and the LED or the optical sensor 21 is provided for each. What is necessary is just to provide. Although the number of LEDs and optical sensors 21 increases, it is possible to detect the storage state with higher accuracy.
- the arithmetic control unit 1 executes a step of correcting an error (obstacle correction step) that occurs when there is an obstacle in the light incident path to the main light sensor 21a.
- the calculation control unit 1 includes an attenuation rate calculation unit 81 that calculates the attenuation rate of the detected illuminance based on the detected illuminance of the optical sensor 21 and the reference data.
- the calculation control unit 1 functions as an attenuation factor calculation correction unit in the obstacle correction step and a reflection correction step described later.
- the storage state estimation unit 82 estimates the storage amount of the stored item based on the calculation result of the attenuation rate calculation unit 81 and the calculation result of the attenuation rate calculation correction unit.
- FIG. 13 is a diagram for explaining an example of storage in the vicinity of the main light sensor 21a of the refrigerator 100 according to the first embodiment of the present invention.
- FIG. 14 is a diagram for explaining an example of the occurrence of an error due to the stored items in the vicinity of the main light sensor 21a of the refrigerator 100.
- FIG. 15 is a diagram illustrating a storage state detection characteristic in the vicinity of the main light sensor 21 a in the refrigerator 100.
- a stored item 23e (hereinafter also referred to as an obstacle) is placed on the lower door storage shelf 19.
- the stored item 23e since the stored item 23e exists in the vicinity of the main light sensor 21a, the stored item 23e may become an obstacle that narrows the light incident path of the main light sensor 21a.
- FIG. 14 shows an example of a storage state detection characteristic by the main light sensor 21a when such an obstacle exists.
- the maximum value (a) of the discrimination characteristic F solid line
- the maximum value (b) of the discrimination characteristic G dotted line
- an error DE occurs depending on the presence or absence of an obstacle.
- the minimum value (c) of the discrimination characteristic F when there is no obstacle is attenuated to the minimum value (d) of the discrimination characteristic F when there is an obstacle, and an error DE occurs.
- the lower side LED 20h provided on the wall surface opposite to the lower side LED 20g and the door side position of the same wall surface as the main light sensor 21a are shifted.
- the stored state of the stored item 23e is detected using the sub light sensor 21b.
- the arithmetic control unit 1 turns off the side lower LED 20g, turns on the side lower LED 20h (S108), and acquires the detection data D of the sub light sensor 21b (S109).
- the characteristics of the detection data D are shown in FIG. If the stored item 23e has a size that narrows the light incident path to the main light sensor 21a, the light path connecting the side lower LED 20h and the sub light sensor 21b is blocked. For this reason, the detection data D of the sub optical sensor 21b is extremely reduced (see FIG. 15).
- the arithmetic control unit 1 compares the detection data D with a predetermined threshold E (S110) to determine whether there is an obstacle. When the detection data D is larger than the predetermined threshold E, it is determined that there is no obstacle (area (a) in FIG. 15), and when the detection data D is smaller than the predetermined threshold E, it is determined that there is an obstacle. (Area (b) in FIG. 15). When it is determined that there is an obstacle, the arithmetic control unit 1 determines the storage state using the determination characteristic F when there is no obstacle shown in FIG. 14 (S111), and when it is determined that there is no obstacle, The storage state is determined using the determination characteristic G when there is an obstacle shown in FIG. 14 (S112).
- the arithmetic control unit 1 holds in advance two types of reference data (discriminant characteristic F and discriminant characteristic G) when there are obstacles and when there are no obstacles, and selects either one in the obstacle correction process to determine the storage state. To do.
- this step may be a step of detecting the stored state of the stored items 23e at the heat insulating door.
- the main light sensor 21a may be disposed at a position that becomes a shadow when the stored item 23e is disposed on the door storage shelf 19.
- the calculation control unit 1 functions as an attenuation rate calculation correction unit that corrects the reference data of the attenuation rate calculation unit 81 based on the storage state of the stored items in the heat insulating doors in the storage chamber.
- the calculation control unit 1 functions as an attenuation rate calculation correction unit that corrects the reference data of the attenuation rate calculation unit 81 based on the storage state of the storage object in the vicinity of the optical sensor 21. Accordingly, it is possible to reliably increase the estimation accuracy of the storage amount due to the bias of the stored items at the heat insulating door.
- the refrigerator 100 according to the present embodiment can also correct an error that occurs when there is an article 23f with high reflectivity (hereinafter also referred to as a reflector) around the main light sensor 21a.
- This correction method (reflecting object correction step) will be described.
- FIG. 16 is a diagram for explaining an example of storing the reflecting object in the vicinity of the main light sensor 21a of the refrigerator 100 according to the first embodiment of the present invention.
- FIG. 17 is a diagram for explaining an example of an error caused by a reflecting object in the vicinity of the main light sensor 21a of the refrigerator 100.
- 18A to 18C are diagrams showing the relationship between the wavelength of light and the reflectance in the refrigerator 100.
- FIG. FIG. 19 is a diagram showing the reflected object detection characteristics in the vicinity of the main light sensor 21 a of the refrigerator 100.
- a storage object (reflecting object) having a high reflectance is an object having a white color or a color close to white.
- An object having a low light diffusibility on the surface, such as a metal container, and having a light collecting property is also defined as a reflector.
- the stored item 23f arranged in the vicinity of the main light sensor 21a is a reflecting object.
- the reflectance of the stored item 23f is high, the attenuation of light due to reflection is small, and the light may be condensed without being diffused. For this reason, the illuminance around the stored item 23f tends to increase. Accordingly, the illuminance around the main light sensor 21a in the vicinity also increases.
- an error occurs due to the difference in reflectance of the storage object 23f.
- an error J occurs in the characteristic (b) when there is a somewhat high reflectance storing thing shown by a dotted line, and the high reflectance shown by a one-dot chain line
- An error H occurs in the characteristic (c) when there is a stored item.
- the blue LED 22a and the main light sensor 21a are used to detect the reflection effect of the stored item 23f. Since a white object generally has a high reflectance, an example of identifying a white object will be described here.
- the reason for using the blue LED 22a will be described.
- FIG. 18A reflectance characteristics with a red object
- light in the blue wavelength band BW having a peak at 400 to 500 nm low reflectivity.
- FIG. 18B reflectance characteristics at a blue object
- the light in the peak wavelength band BW of the blue LED 22a also has a low reflectivity at 50% or less at the blue object.
- FIG. 18C reflectance characteristics of a white object
- a white object has a characteristic of strongly reflecting light in the entire wavelength band, and therefore, with respect to light in the peak wavelength band BW of the blue LED 22a.
- the reflectance becomes high. That is, the blue wavelength is less likely to be reflected by objects other than white, and thus is suitable for distinguishing white objects. Therefore, in the present embodiment, a white object is identified using the blue LED 22a.
- red wavelength band RW having a peak around 650 nm has a high reflectance at the red object, which is equivalent to the reflectance at the white object shown in FIG. 18C. That is, red light is reflected at a constant level even with an object of the same color having a low reflectance, so it is difficult to distinguish between a white object and a red object, and it is better to use the blue LED 22a in order to distinguish the reflected object. .
- the reflectance is affected by the color of the object, for example, if the reflected object is detected using a chromaticity sensor using RGB wavelengths, it can be determined with higher accuracy.
- the arithmetic control unit 1 turns off the interior lighting 20, turns on the blue LED 22a (S113), and records the detection data K by the main light sensor 21a in the memory 2 (S114).
- FIG. 19 is a diagram illustrating the relationship between the error effect due to the reflecting object when the blue LED is lit and the illuminance (detection data K).
- detection data K As a result of the comparison in step S115, if the detection data K is smaller, it is determined that the influence of the reflecting object is minute ES and correction is not performed (S116).
- the detection data K is larger, it is determined that the EL has a reflection effect, and the value of the error J or the error H is estimated based on the error discriminating characteristic M by the reflection object, and the detection data shown in FIG. Correction of C is performed (S117).
- the detection data C is corrected by subtracting the value of the error J or the error H.
- the arithmetic control unit 1 calculates the corrected storage amount detection characteristic.
- the calculation control unit 1 functions as an attenuation rate calculation correction unit that corrects the reference data of the attenuation rate calculation unit 81 based on the reflectance of the stored items in the storage room. Thereby, the estimation accuracy of the storage amount due to the reflectance of the storage object can be reliably increased.
- FIG. 20 is a storage state detection characteristic diagram after correction calculation according to the first embodiment of the present invention.
- FIG. 20 shows storage capacity detection characteristics (after correction) after basic data acquisition, obstacle correction, and reflection object correction are performed by the arithmetic control unit 1 by the steps shown in FIGS. 7A and 7B. Yes. It can be seen that the error between the corrected maximum value (a) and the corrected minimum value (b) is extremely small, and the storage state can be estimated in an analog manner with high accuracy. Using this corrected characteristic, the arithmetic control unit 1 performs storage amount detection. Specifically, the storage state estimation unit 82 estimates the storage amount of the stored item based on the calculation result of the attenuation rate calculation unit 81 (step 118). The storage state estimation unit 82 estimates the storage state of the stored item based on the output value based on the irradiation light from the optical sensor 21.
- the storage state estimation unit 82 of the arithmetic control unit 1 stores the level 1 storage amount when the threshold value P is greater than or equal to the threshold value P, the level 2 storage amount when the threshold values P to Q, and the threshold value Q to R level.
- the storage amount is 3
- the threshold R to S it is determined that the storage amount is level 4
- the storage amount is level 5. That is, when the attenuation rate calculated by the attenuation rate calculation unit 81 is large, the storage state estimation unit 82 estimates that the storage amount is large.
- the storage state estimation unit 82 estimates the storage amount of the storage item based on the value of the attenuation rate calculated by the attenuation rate calculation unit 81, that is, the estimation of the storage amount based on the absolute value of illuminance. did.
- the storage state estimation unit 82 is configured to estimate the storage amount based on the calculation result of the attenuation rate calculation unit 81.
- the attenuation rate calculation unit may calculate the previous calculation result (the previous calculation result may be used). Further, the attenuation rate from the reference storage room illuminance may be calculated using the previous calculation result as a reference storage room illuminance.
- the memory 2 only needs to store data up to the previous time, and the control by the arithmetic control unit 1 becomes easy.
- the arithmetic control unit 1 normally estimates the relative change of the storage amount based on the relative value of the illuminance change, and periodically estimates the absolute value of the storage amount based on the absolute value of the illuminance. It is good. By adopting such a configuration, even when the change in the storage amount with time is very small and the determination level of the storage amount does not change, by periodically estimating the absolute value, The correct storage amount can be determined.
- the storage state estimation unit 82 of the arithmetic control unit 1 uses the detection result of the door opening / closing detection sensor 3 based on the output value of the optical sensor 21 before opening and the output value of the optical sensor 21 after closing. It is also possible to estimate the storage state (increase / decrease) of the storage items in the storage chamber.
- the storage state estimation unit 82 stores the stored items in the storage room when the output value from the optical sensor 21 before opening the door and the output value from the optical sensor 21 after closing the door are smaller than a predetermined value. It is also possible to estimate that the quantity has not changed.
- the output value based on the detected illuminance of the optical sensor 21 is a current value or a voltage value, and the attenuation rate (%) is calculated by comparing the output values.
- the memory 2 stores the attenuation rate (%). What is necessary is that control by the arithmetic control unit 1 is easy.
- the relative change in the storage amount is estimated based on the relative value of the illuminance change ( 7A and 7B, the basic flow is the same, but in the obstacle correction process, there are two types of thresholds with different amounts of change depending on the presence or absence of obstacles. Either one may be selected as the obstacle correction.
- the reflecting object correction step when there is a reflecting object, a certain value may be subtracted to correct the reflecting object so as to determine a larger storage amount.
- the interval between the threshold values P to S is set wide when the storage amount is small and narrow when it is large. This is because the storage amount detection characteristics (after correction) take into account that the inclination becomes larger as the storage amount is smaller, and the inclination becomes smaller as the storage amount is larger.
- the intervals between the storage levels 1 to 5 are uniform. It is set to become.
- the storage amount is estimated based on the absolute value of the illuminance based on the completely analog determination (that is, based on the characteristic diagram of FIG. 20) without performing the step division using the plurality of thresholds as described above.
- the absolute value of the storage amount to be calculated may be calculated).
- the arithmetic control unit 1 controls the cooling system 35 such as the compressor 30, the cooling fan 31, and the air volume adjustment damper 32 according to the storage amount or a change in the storage amount or the storage position. The conditions to change the cooling operation.
- the arithmetic control unit 1 can also notify the user by sequentially turning on the LEDs and blinking the lamp of the display unit 17 while detecting the storage state of the storage items. . Furthermore, after detecting the storage state, the arithmetic control unit 1 can display the detection result on the display unit 17 to notify the user.
- the door opening / closing detection sensor 3 detects the open state of the heat insulating door before the series of control operations in the arithmetic control unit 1 is completed. Assume a case. In such a case, a series of control operations in the calculation control unit 1 are forcibly terminated, and a series of control operations in the calculation control unit 1 are started after the closed state of the heat insulating door is detected again. Thereby, even when the heat insulation door is opened halfway, a more accurate storage state detection is possible by performing a series of control operations again.
- FIG. 7A and FIG. 7B it demonstrated using the example which performs all of a basic data acquisition process, an obstruction correction process, and a reflector correction process.
- the present invention is not limited to this example.
- the order of lighting the top LED 20a, 20b and the side lower LED 20g may be either.
- the refrigerator 100 includes the top LED 20a, 20b and the side lower LEDs 20g, 20h installed in the refrigerator compartment 12, and the main light that is the optical sensor 21 that detects the irradiation light. What is necessary is just the structure which has the sensors 21a and 21c.
- the refrigerator 100 can estimate the storage state of the stored items based on the illuminance attenuation amount in the main light sensors 21a and 21c. Thereby, it is possible to cope with variations in initial characteristics and the like of the LED that is the light source, and it is possible to estimate the entire storage state in the refrigerator compartment 12 with high accuracy.
- steps S105 to S107 are not essential, and acquisition of data A may be used as the basic data acquisition step. .
- the obstacle correction process and the reflector construction process are not essential, and the storage state of the storage object can be estimated only by the basic data acquisition process.
- the storage state of the stored item can be estimated by combining the basic data obtaining step and the obstacle correcting step.
- the storage state of the stored item can be estimated by combining the basic data acquisition step and the reflection correction step.
- the storage state detection operation (basic data acquisition operation) is started.
- the calculation control unit 1 confirms that the output value of the optical sensor 21 is equal to or less than a predetermined value (the state in which there is no irradiation light), and then the basic data acquisition process. You can also move to. Thereby, the influence of the light from the outside of a warehouse can be excluded reliably. Moreover, abnormality, such as a failure of the optical sensor 21, can be detected, and the reliability of the refrigerator 100 can be improved.
- the light emitted from the light source is repeatedly reflected in the storage room, and then travels throughout the entire chamber to enter the optical sensor 21.
- the number of components is small, and the storage state can be detected with a simple configuration. Only one of the main light sensors 21a and 21c may be arranged. Thereby, further cost reduction can be achieved.
- the arithmetic control unit 1 estimates the storage state of the storage items from the storage state of each light source based on the light received by a plurality of light sources and a single optical sensor 21 provided in the storage chamber.
- the storage chamber is divided into a plurality of sections (divided into two sections in the height direction, the depth direction, and the width direction, etc.), at least one of the plurality of light sources is disposed in the section where the optical sensor 21 is disposed, Based on the result of detecting the light emitted from the light source in each section by the optical sensor 21, the storage state of the storage object is estimated.
- the attenuation amount of the illuminance detected by the main light sensors 21a and 21c can be set as the attenuation amount of the illuminance in the actual storage state with respect to the reference storage room illuminance in the state where there is no storage in the storage chamber, Using this, the storage state of the stored item is estimated. Thereby, it is possible to cope with not only the variation of the LED as the light source but also the individual variation within the storage room of the refrigerator 100, and the estimation accuracy of the stored state of the stored items can be further increased.
- the attenuation amount of illuminance detected by the main light sensors 21a and 21c is calculated by detecting indirect irradiation light including reflected light from the stored items in the storage chamber. Thereby, the storage state of the stored item can be estimated easily and accurately.
- the main light sensors 21a and 21c are arranged so as to be shifted from the optical axis of the light source. Thereby, since the main light sensors 21a and 21c do not receive the direct light from the light source, it is possible to easily and accurately estimate the storage state of the storage items in the entire warehouse.
- the main light sensors 21a and 21c and the light source are arranged on surfaces that do not face each other in the storage chamber, or are arranged so as not to face each other. Thereby, the main light sensors 21a and 21c can reliably prevent the reception of direct light from the light source, and can easily and accurately estimate the storage state of the storage items in the entire storage.
- an attenuation rate calculation correction unit that corrects the illuminance attenuation amount in the main light sensors 21a and 21c according to the storage state, it is possible to absorb the variation factor due to the bias of the storage items in the storage chamber, and to store the storage items. The estimation accuracy of the storage amount resulting from the state can be improved.
- an attenuation rate calculation correction unit that corrects the illuminance attenuation amount in the main light sensors 21a and 21c depending on the storage state
- a unit for correcting the storage state in the vertical direction of the storage item in the storage chamber is provided. It is possible to reliably increase the estimation accuracy of the storage amount due to the vertical deviation.
- an attenuation factor calculation correction unit that corrects the illuminance attenuation amount in the main light sensors 21a and 21c depending on the storage state
- a means for correcting the storage state of the storage item in the heat insulating door in the storage chamber is provided. It is possible to reliably increase the estimation accuracy of the storage amount caused by the bias in the heat insulating door.
- an attenuation rate calculation correction unit that corrects the illuminance attenuation amount in the main light sensors 21a and 21c depending on the storage state
- a unit for correcting the storage state of the storage object in the vicinity of the optical sensor 21 in the storage room is provided. It is possible to reliably increase the estimation accuracy of the storage amount resulting from the generation of shadows by the storage object with respect to the optical sensor 21.
- an attenuation rate calculation correction unit that corrects the illuminance attenuation amount in the main light sensors 21a and 21c according to the storage state
- a means for correcting the reflectance of the storage item in the storage chamber is provided, thereby improving the reflectance of the storage item. It is possible to reliably improve the estimation accuracy of the resulting storage amount.
- the optical sensor 21 can reduce the influence of dew condensation due to the inflow of outside air when the door is opened and closed.
- the storage state can be estimated with high accuracy.
- the interior lighting 20 and the optical sensor 21 are provided closer to the refrigerator compartment door 12a than the center of the refrigerator compartment 12 in the depth direction. Therefore, the storage state of the storage thing near the entrance which is easy to be influenced by the outside air inflow by opening and closing the door can be reliably detected.
- the interior lighting 20 and the optical sensor 21 are provided between the front end of the interior storage shelf 18 provided in the refrigerator compartment 12 and the refrigerator compartment door 12a. There is a low possibility that the upper and lower spaces between the refrigerator compartment door 12a and the front end of the storage shelf 18 are blocked by stored items. Thereby, while ensuring a stable optical path from the light source, the stored state of the stored item is accurately estimated based on the illuminance attenuation amount in the optical sensor 21 due to the presence of the stored item in the heat insulating door or the storage cabinet 18. be able to.
- the refrigerator compartment 12 is divided into a plurality of sections, it is possible to detect the storage state with high accuracy regardless of the bias of the storage items.
- the light source used for the storage state detection is also used as the interior lighting 20, it is possible to detect the storage state with a simple configuration without providing a new light source.
- the interior lighting 20 and at least a part of the light source used for the storage state detection are combined, the brightness for the illumination when the door is opened and the brightness of the illumination necessary for the storage state detection are changed. By doing so, the accuracy of the storage state detection can be further improved.
- the detection is performed with a combination in which the LED and the optical sensor 21 are not opposed to each other, the light component directly incident on the optical sensor 21 from the LED can be suppressed, and the attenuation factor of light by the stored item is increased. Detection accuracy can be improved.
- FIG. 21 is a cross-sectional view seen from the side of the refrigerator 200 in the second embodiment of the present invention.
- FIG. 22 is a diagram for explaining a state in which the stored item 23h is stored in the back of the refrigerator compartment of the refrigerator 200.
- FIG. 23A is a cross-sectional view seen from above showing an arrangement example of the optical sensor 21 of the refrigerator 201 in the same embodiment.
- FIG. 23B is a cross-sectional view seen from above showing an arrangement example of the photosensors 21 of the refrigerator 202 in the same embodiment.
- FIG. 24A is a cross-sectional view seen from the side showing an arrangement example of the optical sensors 21 of the refrigerator 203 in the same embodiment.
- FIG. 24B is a cross-sectional view seen from the side showing an arrangement example of the photosensors 21 of the refrigerator 204 in the same embodiment.
- FIG. 25 is a cross-sectional view seen from above showing an arrangement example of the optical sensor 21 in the air passage in the refrigerator 205 according to the embodiment.
- main light sensors 21d and 21e are arranged on the top surface.
- Light from the lighting LEDs 20c to 20f and the lower side LED 20g irradiated in the back direction from the refrigerator door 12a side is reflected by the inner wall of the cabinet or food and spread to the whole chamber, and then the main light sensor 21d, 21e.
- the luminous intensity of the main LEDs 21c to 20f and the side lower LED 20g is 50% or more so that the light from the lighting LEDs 20c to 20f and the side lower LED 20g does not directly enter the main light sensor 21d. Is disposed outside the irradiation angle ⁇ .
- the top light sensor 21d is provided at a position closer to the refrigerator compartment door 12a than 1/2 (center) of the interior depth.
- the main light sensor 21e is installed in a role of complementing the main light sensor 21d in order to more accurately detect the stored state on the inner side of the interior. For this reason, the main light sensor 21e is disposed on the inner side of the interior and within the incident angle ⁇ of the illumination LED 20c.
- the housing state can be detected by the other main light sensor 21d.
- the main light sensor 21d is arranged on the top surface closer to the refrigerator compartment door 12a than 1/2 (center) in the depth direction of the storage room. Further, the main light sensor 21e is provided on the top surface on the back side with respect to 1/2 (center) in the depth direction.
- the present invention is not limited to this example.
- the main light sensor 21f is arranged on the door side to the left of 1/2 (center) in the horizontal width direction of the storage room, and the main light sensor 21g is 1 / of the horizontal width of the interior. You may install in the right door side rather than 2 (center).
- the main light sensor 21h is disposed in the refrigerator compartment door 12a, and the main light sensor 21i is installed on the back side to the right of 1/2 (center) of the horizontal width of the interior. May be. With this configuration, it is possible to detect not only the left and right food storage states but also the back and front food storage states in detail. Further, by providing the main light sensor 21h on the refrigerator compartment door 12a, the main light sensor 21h is arranged so as to look over the entire interior in the back direction, and the storage amount of the entire interior can be easily detected. In order to obtain the same effect, the main light sensor can be provided on the inner wall surface by installing the main light sensor toward the back.
- the main light sensor 21j is installed at the upper part of the storage room and on the refrigerator compartment door 12a side, and the main light sensor 21k is installed at the lower part of the storage room and on the refrigerator compartment door 12a side. May be.
- the main light sensor 21j detects the amount of light in the storage space above 1 ⁇ 2 (center) of the interior height, and the main light sensor 21k is below 1 ⁇ 2 (center) of the interior height. It is possible to detect the amount of light in the storage space on the side.
- the main light sensors 21j and 21k are provided above and below the refrigerator compartment 12 having the highest height compared to other storage rooms, the food storage state can be detected in detail.
- a main light sensor 21m is provided on the upper side of the storage room and on the refrigerator door 12a side, and the main light sensor 21n is installed on the lower side and the back side of the storage room. Also good.
- the storage space on the front and upper side of the storage space can be detected by the main light sensor 21m, and the storage space on the rear and lower side of the storage space can be detected by the main light sensor 21n.
- the main optical sensors 21p and 21q are used to blow cool air into the refrigerator compartment 12. You may provide in the cooling air path 25 provided in this. At this time, the light passes through the discharge port 26 and enters the sub-light sensor 21b. However, since the discharge port 26 into the storage chamber of the cooling air passage 25 is reliably opened, the main light sensors 21p and 21q are stored. A light incident path can be secured without being blocked by an object. In the unlikely event that the discharge port 26 is blocked by a stored item such as food, the luminous intensity of the light decreases, so that it can be detected that the efficiency of cooling air blowing into the refrigerator compartment 12 decreases.
- optical sensor 21 not only in the discharge port 26 of an air path but in the suction inlet vicinity.
- the mode in which two main light sensors 21a to 21q are used has been described.
- the number of light sensors 21 used is not limited to this, and is set to one to suppress the amount of material used. Alternatively, a large number may be provided in order to easily improve the detection accuracy.
- the arrangement of the plurality of optical sensors 21 is not limited to the above-described pattern, and when the refrigerator 200 is divided into two sections, the light sources or the optical sensors 21 may be disposed in both sections.
- the optical sensor 21 or the LED may be driven by a motor actuator or the like so that the angle can be freely changed.
- the lighting LEDs 20c to 20f and the side lower LEDs 20g and 20h are connected to the main compartment of the refrigerator compartment 12 partitioned by the heat insulating walls and the heat insulating doors as storage state detection units for determining the storage state.
- Optical sensors 21a to 21q are provided. Further, at least one of the optical sensors 21 is provided on the door side with respect to the depth center of the refrigerator compartment 12. Accordingly, since the food temperature affected by the storage state can be controlled to be an appropriate temperature, the freshness can be improved and the power consumption can be suppressed by preventing “too cold”.
- the optical sensor 21 constituting the storage state detection unit closer to the refrigerator compartment door 12a than the center of the depth of the storage room, the storage state of the food near the entrance that is easily affected by outside air inflow due to opening and closing of the door can be achieved. It can be detected accurately and kept at an appropriate temperature. Further, for example, in the case of the refrigerator compartment 12, since there is a space between the storage shelf 18 and the door storage shelf 19, by arranging the optical sensor 21 here, the storage state detection unit is blocked by the stored food. Can be prevented.
- the optical sensor 21 when the optical sensor 21 is provided in the refrigerator compartment door 12a, the optical sensor 21 can be provided so as to look over the entire interior from the door side toward the interior of the interior.
- the refrigerator compartment 12 is divided into two front and rear sections at the center of the depth, if the optical sensor 21 is provided in each section, it is possible to accurately detect the storage state of the stored item on the inner side of the refrigerator.
- the refrigerator compartment 12 is divided into two left and right sections at the center of the width, if the optical sensor 21 is provided in each section, it is possible to determine the left and right deviation of the stored food.
- the optical sensor 21 can be provided in each section.
- the optical sensor 21 is arrange
- chamber can be detected correctly.
- the optical sensor 21 outside the irradiation range where the luminous intensity of the LED is 50% or more, the irradiation light of the LED does not directly enter the optical sensor 21, but is reflected or shielded by the stored items. Since the light is incident on the optical sensor 21, the storage state can be easily detected.
- the optical sensor 21 can be provided in the cooling air passage 25 for sending cold air into the storage room.
- the discharge port 26 to the storage chamber of the cooling air passage 25 is reliably opened, the light incident path can be secured without the optical sensor 21 being blocked by food.
- the luminous intensity of the light is reduced, so that it can be detected that the efficiency of cooling air blowing into the refrigerator compartment 12 is reduced.
- the storage state can be confirmed in every corner of the cabinet even in a large storage room.
- the above-described configuration of the refrigerators 100 and 200 to 205 can be applied to a household or commercial refrigerator.
- the storage amount detection function of the refrigerators 100 and 200 to 205 can be used and applied to control for switching the operation mode to power saving operation or the like.
- the refrigerators 100, 200 to 205 described in the embodiments can not only determine the position of the stored items in the storage chamber but also estimate the total storage amount. By performing temperature control according to the state, it is possible to improve usefulness such as improving the freshness and suppressing power consumption by preventing excessive cooling.
- the description has been given using an example in which the storage state of the stored items in the refrigerator compartment 12 is detected as the storage chamber.
- the present invention is not limited to this example, and can be applied to other storage rooms such as the ice making room 13, the switching room 14, the freezing room 15, and the vegetable room 16.
- the present invention since it is possible to achieve a special effect that cooling according to the storage state of the stored item in the refrigerator is possible, the stored state of the stored item in the warehouse is detected. It is useful as a refrigerator provided with means.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Description
以下、本発明の第1の実施の形態を図1から図20までの図面に基づいて説明する。
以下、本発明の第2の実施の形態における冷蔵庫200~205の構成について、図21から図25までの図面に基づいて説明する。
2 メモリ
3 扉開閉検知センサ
4 タイマ
11 冷蔵庫本体
12 冷蔵室
12a 冷蔵室扉
13 製氷室
14 切換室
15 冷凍室
16 野菜室
17 表示部
18 庫内収納棚
19 扉収納棚
20 庫内照明
20a,20b 天面LED
20c~20f 照明用LED
20g,20h 側面下方LED
21 光センサ
21a,21c~21q メイン光センサ
21b サブ光センサ
22a,22b 青色LED
23a~23h 収納物
24a~24j 光
25 冷却風路
26 吐出口
30 コンプレッサ
31 冷却ファン
32 風量調節ダンパー
35 冷却システム
81 減衰率演算部
82 収納状態推定部
100,200~205 冷蔵庫
Claims (7)
- 断熱壁および断熱扉によって区画され、収納物を収納する収納室と、
前記収納室の内部に設置された光源と、
前記光源から照射された照射光を検知する光センサと、
前記光センサの検知結果に基づいて演算処理する演算制御部とを備え、
前記演算制御部は、前記収納室内に前記収納物がない状態における基準収納室照度と前記光センサの検知照度とに基づいて、前記収納物を収納した状態における前記基準収納室照度からの減衰率を演算する減衰率演算部と、
前記減衰率演算部の演算結果に基づいて前記収納物の収納量を推定する収納状態推定部と、を有する
冷蔵庫。 - 前記減衰率演算部により演算された前記減衰率が大きい場合には、前記収納状態推定部は前記収納量が多いと推定する
請求項1に記載の冷蔵庫。 - 前記断熱扉の開閉を検知する扉開閉検知部をさらに備え、
前記扉開閉検知部が閉状態を検知した場合に、前記演算制御部は前記演算処理を開始する
請求項1または請求項2に記載の冷蔵庫。 - 前記光センサは、前記収納室の奥行き方向における中心よりも前記断熱扉側に配置され、前記照射光が前記収納室の壁面または前記収納物に反射した反射光を検知する
請求項1に記載の冷蔵庫。 - 前記光センサは、前記収納室に備えられた庫内収納棚の前方側の端部を含む鉛直面と、前記断熱扉の後方側の端部を含む鉛直面との間に設けられる
請求項4に記載の冷蔵庫。 - 前記収納室の内部において、前記光源は、前記光センサよりも上方に配置される請求項4または請求項5に記載の冷蔵庫。
- 前記収納室の内部において、前記光センサは、前記光源の光軸からずらした位置に配置される
請求項4または請求項5に記載の冷蔵庫。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112013022140-2A BR112013022140B1 (pt) | 2011-03-02 | 2012-02-29 | refrigerador |
EP12752642.4A EP2682694B1 (en) | 2011-03-02 | 2012-02-29 | Refrigerator |
CN201280011278.8A CN103443566B (zh) | 2011-03-02 | 2012-02-29 | 冷藏库 |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-044631 | 2011-03-02 | ||
JP2011044631 | 2011-03-02 | ||
JP2011-147011 | 2011-07-01 | ||
JP2011147011 | 2011-07-01 | ||
JP2011-222481 | 2011-10-07 | ||
JP2011222481 | 2011-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012117724A1 true WO2012117724A1 (ja) | 2012-09-07 |
Family
ID=46757667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/001375 WO2012117724A1 (ja) | 2011-03-02 | 2012-02-29 | 冷蔵庫 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2682694B1 (ja) |
JP (18) | JP2013092350A (ja) |
BR (1) | BR112013022140B1 (ja) |
WO (1) | WO2012117724A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014156051A1 (ja) * | 2013-03-29 | 2014-10-02 | パナソニック株式会社 | 冷蔵庫、および冷蔵庫システム |
WO2020196467A1 (ja) * | 2019-03-28 | 2020-10-01 | 三菱電機株式会社 | 冷蔵庫 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6478083B2 (ja) * | 2014-02-20 | 2019-03-06 | パナソニックIpマネジメント株式会社 | 冷蔵庫 |
CN103940191B (zh) * | 2014-04-18 | 2016-04-13 | 河南新飞家电有限公司 | 一种基于传感技术的冰箱感应控制系统及感应控制方法 |
CN105592347A (zh) * | 2015-12-15 | 2016-05-18 | 天脉聚源(北京)传媒科技有限公司 | 一种材料贮存状态的确定方法及装置 |
CN110864478B (zh) * | 2018-08-28 | 2021-04-23 | 海尔智家股份有限公司 | 冰箱冷藏室的制冷控制方法和冰箱 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08247608A (ja) | 1994-11-30 | 1996-09-27 | Samsung Electronics Co Ltd | 冷蔵庫用冷気吐出し制御装置及びその制御方法 |
JPH08303922A (ja) * | 1995-05-11 | 1996-11-22 | Matsushita Refrig Co Ltd | 冷蔵庫 |
JP2006336963A (ja) * | 2005-06-03 | 2006-12-14 | Matsushita Electric Ind Co Ltd | 冷蔵庫 |
JP2008070000A (ja) * | 2006-09-12 | 2008-03-27 | Matsushita Electric Ind Co Ltd | 貯蔵庫 |
JP2010151367A (ja) * | 2008-12-25 | 2010-07-08 | Panasonic Corp | 冷蔵庫 |
JP2010196697A (ja) * | 2008-12-24 | 2010-09-09 | Panasonic Corp | 冷蔵庫用の圧縮機 |
JP2010255877A (ja) * | 2009-04-22 | 2010-11-11 | Panasonic Corp | 冷蔵庫 |
JP2011043263A (ja) * | 2009-08-19 | 2011-03-03 | Mitsubishi Electric Corp | 冷蔵庫 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4082764B2 (ja) * | 1997-09-11 | 2008-04-30 | 株式会社東芝 | 冷蔵庫 |
JPH11264642A (ja) * | 1998-03-19 | 1999-09-28 | Sanyo Electric Co Ltd | 冷蔵庫 |
JP2005345904A (ja) * | 2004-06-04 | 2005-12-15 | Sony Corp | 画像生成装置 |
JP2006162211A (ja) * | 2004-12-10 | 2006-06-22 | Toshiba Corp | 冷蔵庫 |
JP2007046833A (ja) * | 2005-08-09 | 2007-02-22 | Funai Electric Co Ltd | 物品保存庫、物品保存庫監視システム及び冷蔵庫監視システム |
JP4745790B2 (ja) * | 2005-10-21 | 2011-08-10 | Hoya株式会社 | 電子内視鏡装置 |
CN101198233A (zh) * | 2006-12-08 | 2008-06-11 | 奥斯兰姆奥普托半导体有限责任公司 | 电器 |
JP5082778B2 (ja) * | 2007-11-06 | 2012-11-28 | パナソニック株式会社 | 冷蔵庫 |
CN102472567B (zh) * | 2009-07-10 | 2014-06-04 | 松下电器产业株式会社 | 冰箱 |
-
2012
- 2012-02-29 JP JP2012042952A patent/JP2013092350A/ja not_active Ceased
- 2012-02-29 WO PCT/JP2012/001375 patent/WO2012117724A1/ja unknown
- 2012-02-29 JP JP2012042950A patent/JP2013092348A/ja not_active Ceased
- 2012-02-29 JP JP2012042948A patent/JP2013092346A/ja not_active Ceased
- 2012-02-29 JP JP2012042949A patent/JP2013092347A/ja not_active Ceased
- 2012-02-29 JP JP2012042947A patent/JP2013092345A/ja not_active Ceased
- 2012-02-29 JP JP2012042951A patent/JP2013092349A/ja not_active Ceased
- 2012-02-29 JP JP2012042946A patent/JP2013092344A/ja not_active Ceased
- 2012-02-29 EP EP12752642.4A patent/EP2682694B1/en active Active
- 2012-02-29 JP JP2012042945A patent/JP2013092343A/ja not_active Ceased
- 2012-02-29 BR BR112013022140-2A patent/BR112013022140B1/pt active IP Right Grant
-
2013
- 2013-01-08 JP JP2013000825A patent/JP5903586B2/ja active Active
- 2013-01-08 JP JP2013000826A patent/JP5903587B2/ja active Active
- 2013-05-14 JP JP2013101812A patent/JP5360325B2/ja active Active
- 2013-05-14 JP JP2013101813A patent/JP5348347B2/ja active Active
- 2013-05-14 JP JP2013101811A patent/JP5348346B2/ja active Active
- 2013-05-14 JP JP2013101815A patent/JP5348349B2/ja active Active
- 2013-05-14 JP JP2013101809A patent/JP5348344B2/ja active Active
- 2013-05-14 JP JP2013101816A patent/JP5348350B2/ja active Active
- 2013-05-14 JP JP2013101814A patent/JP5348348B2/ja active Active
- 2013-05-14 JP JP2013101810A patent/JP5348345B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08247608A (ja) | 1994-11-30 | 1996-09-27 | Samsung Electronics Co Ltd | 冷蔵庫用冷気吐出し制御装置及びその制御方法 |
JPH08303922A (ja) * | 1995-05-11 | 1996-11-22 | Matsushita Refrig Co Ltd | 冷蔵庫 |
JP2006336963A (ja) * | 2005-06-03 | 2006-12-14 | Matsushita Electric Ind Co Ltd | 冷蔵庫 |
JP2008070000A (ja) * | 2006-09-12 | 2008-03-27 | Matsushita Electric Ind Co Ltd | 貯蔵庫 |
JP2010196697A (ja) * | 2008-12-24 | 2010-09-09 | Panasonic Corp | 冷蔵庫用の圧縮機 |
JP2010151367A (ja) * | 2008-12-25 | 2010-07-08 | Panasonic Corp | 冷蔵庫 |
JP2010255877A (ja) * | 2009-04-22 | 2010-11-11 | Panasonic Corp | 冷蔵庫 |
JP2011043263A (ja) * | 2009-08-19 | 2011-03-03 | Mitsubishi Electric Corp | 冷蔵庫 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2682694A4 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014156051A1 (ja) * | 2013-03-29 | 2014-10-02 | パナソニック株式会社 | 冷蔵庫、および冷蔵庫システム |
JP2021073421A (ja) * | 2013-03-29 | 2021-05-13 | パナソニックIpマネジメント株式会社 | システム |
WO2020196467A1 (ja) * | 2019-03-28 | 2020-10-01 | 三菱電機株式会社 | 冷蔵庫 |
WO2020194682A1 (ja) * | 2019-03-28 | 2020-10-01 | 三菱電機株式会社 | 冷蔵庫 |
JPWO2020196467A1 (ja) * | 2019-03-28 | 2021-10-14 | 三菱電機株式会社 | 冷蔵庫 |
JP7138774B2 (ja) | 2019-03-28 | 2022-09-16 | 三菱電機株式会社 | 冷蔵庫 |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5348346B2 (ja) | 冷蔵庫 | |
EP2767786B1 (en) | Refrigerator | |
WO2013125186A1 (ja) | 冷蔵庫 | |
JP5895117B2 (ja) | 冷蔵庫 | |
TWI589823B (zh) | refrigerator | |
JP5970653B2 (ja) | 冷蔵庫 | |
JP5870248B2 (ja) | 冷蔵庫 | |
JP2014035084A (ja) | 冷蔵庫 | |
JP2013204894A (ja) | 冷蔵庫 | |
JP5870249B2 (ja) | 冷蔵庫 | |
JP5895118B2 (ja) | 冷蔵庫 | |
JP2013170727A (ja) | 冷蔵庫 | |
JP2014035083A (ja) | 冷蔵庫 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12752642 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112013022140 Country of ref document: BR |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
ENP | Entry into the national phase |
Ref document number: 112013022140 Country of ref document: BR Kind code of ref document: A2 Effective date: 20130829 |