WO2017141552A1 - 冷蔵庫 - Google Patents
冷蔵庫 Download PDFInfo
- Publication number
- WO2017141552A1 WO2017141552A1 PCT/JP2016/088982 JP2016088982W WO2017141552A1 WO 2017141552 A1 WO2017141552 A1 WO 2017141552A1 JP 2016088982 W JP2016088982 W JP 2016088982W WO 2017141552 A1 WO2017141552 A1 WO 2017141552A1
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- WIPO (PCT)
- Prior art keywords
- light
- light source
- radiation intensity
- wavelength
- refrigerator
- Prior art date
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/26—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D27/00—Lighting arrangements
Definitions
- This invention relates to a refrigerator.
- an irradiation plate in which a plurality of light emitting diode elements of three colors of red, blue, and green are arranged is provided in a vegetable room of the refrigerator, and the irradiation plate is divided into a plurality of areas, and light emission is irradiated for each area.
- a device provided with a selection means for changing the combination of light emission colors of the diode elements is known (see, for example, Patent Document 1).
- Patent Document 1 does not consider the characteristics of light of each color of red, blue, and green in the photosynthesis of plants, that is, the characteristics of each light wavelength. Therefore, light having a light emission energy more than necessary to cause constant photosynthesis is irradiated, or a part of the light emission energy is converted into heat and wasteful energy is consumed.
- the present invention has been made to solve such problems, and efficiently utilizes light radiant energy without consuming extra energy, so that vegetables and fruits such as preserved vegetables (particularly leaf vegetables) can be used.
- a refrigerator capable of promoting photosynthesis is obtained.
- the refrigerator according to the present invention includes a storage room for storing food, and a light emitting unit capable of irradiating visible light inside the storage room, wherein the light emitting part is centered on the first wavelength in the visible light region.
- a first light source that emits light having a wavelength
- a second light source that emits light having a second wavelength in a visible light region shorter than the first wavelength as a central wavelength, and irradiates the light.
- light is emitted from the first light source with a first radiation intensity
- light is emitted from the second light source with a second radiation intensity different from the first radiation intensity.
- the light radiant energy can be efficiently used without consuming extra energy, and the photosynthesis of vegetables and the like (especially leaf vegetables) during storage can be promoted. Play.
- FIG. 1 It is a front view of the refrigerator which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the refrigerator which concerns on Embodiment 1 of this invention. It is the figure which expanded and showed the vegetable compartment part of FIG. It is a figure which shows the structure of the light emission part with which the refrigerator which concerns on Embodiment 1 of this invention is provided. It is a block diagram which shows the structure of the control system of the refrigerator which concerns on Embodiment 1 of this invention. It is a time chart of the light irradiation control of each light source with which the light emission part of the refrigerator which concerns on Embodiment 1 of this invention is provided.
- FIG. 1 to 13 relate to Embodiment 1 of the present invention.
- FIG. 1 is a front view of the refrigerator
- FIG. 2 is a longitudinal sectional view of the refrigerator
- FIG. 3 is an enlarged view of the vegetable compartment portion of FIG.
- FIG. 4 is a diagram showing a configuration of a light emitting unit provided in the refrigerator
- FIG. 5 is a block diagram showing a configuration of a control system of the refrigerator
- FIG. 6 is a time chart of light irradiation control of each light source provided in the light emitting unit of the refrigerator
- FIG. 7 is a flow diagram showing the flow of light irradiation control in the refrigerator
- FIG. 1 is a front view of the refrigerator
- FIG. 2 is a longitudinal sectional view of the refrigerator
- FIG. 3 is an enlarged view of the vegetable compartment portion of FIG.
- FIG. 4 is a diagram showing a configuration of a light emitting unit provided in the refrigerator
- FIG. 5 is a block diagram showing a configuration of a control system
- FIG. 8 is a diagram showing an example of the relationship between photosynthetic photon density and the rate of change in vitamin C when cabbage is stored for 3 days
- FIG. 9 is an equivalent photon flux.
- FIG. 10 is a diagram showing an example of the energy amounts of green light and red light
- FIG. 10 is a diagram showing the relationship between the radiant energy ratio R / G of green light and red light, and the total energy of green light and red light. 11 is when the energy amount ratio of green light and red light is 1: 2.
- FIG. 12 is a diagram showing an example of the amount of energy having a total photon flux density equal to 9
- FIG. 12 is a diagram showing an example of comparison of the amount of vitamin C when cabbage is stored for 3 days under a plurality of light irradiation conditions
- FIG. 13 is a refrigerator. It is a time chart of the light irradiation control of each light source with which the light emission part of this is equipped, and the opening / closing state of a vegetable compartment door.
- each component may differ from the actual one.
- the positional relationship (for example, up-and-down relationship etc.) between each structural member is a thing when installing the refrigerator in a usable state in principle.
- the refrigerator 1 according to Embodiment 1 of the present invention has a heat insulating box 90 as shown in FIG.
- the heat insulation box 90 has a front surface (front) opened and a storage space formed therein.
- the heat insulation box 90 has an outer box, an inner box, and a heat insulating material.
- the outer box is made of steel.
- the inner box is made of resin.
- the inner box is arranged inside the outer box.
- the heat insulating material is, for example, urethane foam and is filled in a space between the outer box and the inner box.
- the storage space formed inside the heat insulation box 90 is partitioned into a plurality of storage chambers for storing and storing food by one or a plurality of partition members.
- the refrigerator 1 includes a refrigerator room 100, a switching room 200, an ice making room 300, a freezer room 400, and a vegetable room 500 as a plurality of storage rooms. These storage chambers are arranged in a four-stage configuration in the vertical direction in the heat insulating box 90.
- the refrigerator compartment 100 is disposed on the uppermost stage of the heat insulation box 90.
- the switching chamber 200 is disposed on one side of the left and right below the refrigerator compartment 100.
- the cold insulation temperature zone of the switching chamber 200 can be switched by selecting one of a plurality of temperature zones.
- the plurality of temperature zones that can be selected as the cooling temperature zone of the switching chamber 200 are, for example, a refrigeration temperature zone (eg, about ⁇ 18 ° C.), a refrigeration temperature zone (eg, about 3 ° C.), a chilled temperature zone (eg, about 0 ° C.), and the like.
- Soft freezing temperature range for example, about -7 ° C.
- the ice making chamber 300 is disposed adjacent to the side of the switching chamber 200 in parallel with the switching chamber 200, that is, on the left and right other sides below the refrigerator compartment 100.
- the freezing room 400 is disposed below the switching room 200 and the ice making room 300.
- the freezer compartment 400 is mainly used when the object to be stored is stored frozen for a relatively long period of time.
- the vegetable room 500 is arranged at the lowermost stage below the freezer room 400.
- the vegetable room 500 is mainly for storing vegetables and large-sized plastic bottles having a large capacity (for example, 2 L).
- the opening formed in the front surface of the refrigerator compartment 100 is provided with a rotary refrigerator compartment door 7 that opens and closes the opening.
- the refrigerator compartment door 7 is a double door type (double door type), and is constituted by a right door 7a and a left door 7b.
- An operation panel 6 is provided on the outer surface of the refrigerator compartment door 7 (for example, the left door 7 b) on the front surface of the refrigerator 1.
- the operation panel 6 includes an operation unit 6a and a display unit 6b.
- the operation unit 6a is an operation switch for setting the cold temperature of each storage room and the operation mode (such as the thawing mode) of the refrigerator 1.
- the display unit 6b is a liquid crystal display that displays various types of information such as the temperature of each storage room.
- the operation panel 6 may include a touch panel that serves as both the operation unit 6a and the display unit 6b.
- Each storage room (the switching room 200, the ice making room 300, the freezing room 400, and the vegetable room 500) other than the refrigerator room 100 is opened and closed by a drawer door.
- These drawer-type doors slide in the depth direction (front-rear direction) of the refrigerator 1 by sliding a frame fixed to the door with respect to rails formed horizontally on the left and right inner wall surfaces of each storage room. It can be opened and closed.
- a switching chamber storage case 201 and a freezer compartment storage case 401 that can store foods and the like are retractably stored inside the switching chamber 200 and inside the freezer compartment 400.
- a switching chamber storage case 201 and a freezer compartment storage case 401 that can store foods and the like are retractably stored inside the switching chamber 200 and inside the freezer compartment 400.
- an upper storage case 11 and a lower storage case 10 that can store food and the like are stored in a freely retractable manner.
- the refrigerator 1 includes a refrigeration cycle circuit that cools the air supplied to each storage room.
- the refrigeration cycle circuit includes a compressor 2, a condenser (not shown), a throttling device (not shown), a cooler 3, and the like.
- the compressor 2 compresses and discharges the refrigerant in the refrigeration cycle circuit.
- the condenser condenses the refrigerant discharged from the compressor 2.
- the expansion device expands the refrigerant that has flowed out of the condenser.
- the cooler 3 cools the air supplied to each storage chamber by the refrigerant expanded by the expansion device.
- the compressor 2 is arrange
- the refrigerator 1 is formed with an air passage 5 for supplying air cooled by the refrigeration cycle circuit to each storage room.
- the air passage 5 is mainly disposed on the back side in the refrigerator 1.
- the cooler 3 of the refrigeration cycle circuit is installed in the air path 5. Further, a blower fan 4 for sending the air cooled by the cooler 3 to each storage chamber is also installed in the air passage 5.
- the air (cold air) cooled by the cooler 3 is sent to the freezing room 400, the switching room 200, the ice making room 300, and the refrigerating room 100 through the air path 5, and these storage rooms are passed through. Cooling.
- the vegetable room 500 is cooled by introducing the return cold air from the refrigerating room 100 into the vegetable room 500 through the return air passage for the refrigerating room.
- the cold air that has cooled the vegetable compartment 500 is returned to the air passage 5 with the cooler 3 through the vegetable compartment return air passage (these return air passages are not shown). And it cools again by the cooler 3, and cold air is circulated through the refrigerator 1.
- a damper (not shown) is provided in the middle of the air passage 5 leading to each storage room.
- Each damper opens and closes a portion of the air passage 5 that leads to each storage chamber.
- the amount of cool air supplied to each storage chamber can be adjusted.
- the temperature of the cold air can be adjusted to control the operation of the compressor 2.
- the refrigeration cycle circuit including the compressor 2 and the cooler 3 provided as described above, the blower fan 4, the air passage 5, and the damper constitute a cooling means for cooling the inside of the storage chamber.
- a control device 8 is accommodated in the upper portion of the refrigerator 1, for example, on the back side.
- the control device 8 is provided with a control circuit and the like for performing various controls necessary for the operation of the refrigerator 1.
- a control circuit with which the control apparatus 8 is provided for example, a circuit for controlling the operation of the compressor 2 and the blower fan 4 and the opening degree of the damper based on the temperature in each storage chamber and information input to the operation panel 6 or the like. Can be mentioned. That is, the control device 8 controls the operation of the refrigerator 1 by controlling the cooling means and the like described above.
- the temperature in each storage chamber can be detected by a thermistor (not shown) or the like installed in each storage chamber.
- FIG. 3 is a cross-sectional view of the vegetable compartment 500 portion included in the refrigerator 1.
- the vegetable room 500 is a storage room for storing food, particularly vegetables.
- the lower storage case 10 is supported by a frame (not shown) of the vegetable compartment door 9.
- An upper storage case 11 is placed on the upper side of the lower storage case 10.
- the lower storage case 10 and the upper storage case 11 are integrated with the vegetable compartment door 9 and pulled forward.
- only the upper storage case 11 is slid rearward with the vegetable compartment door 9 pulled out, only the lower storage case 10 is pulled out. In a state where only the lower storage case 10 is pulled out, food can be taken in and out of the lower storage case 10.
- a door opening / closing detection switch 12 Inside the vegetable compartment 500, a door opening / closing detection switch 12, a thermistor 13, and a light emitting unit 14 are provided.
- the door open / close detection switch 12 is for detecting the open / closed state of the vegetable compartment door 9.
- the door open / close detection switch 12 is provided at a position facing the vegetable compartment door 9 at the edge of the front opening of the vegetable compartment 500.
- the thermistor 13 and the light emitting unit 14 are attached to the back of the vegetable room 500.
- the thermistor 13 detects the temperature in the vegetable compartment 500.
- the light emission part 14 can irradiate the inside of the vegetable compartment 500 which is a storage room with visible light.
- an opening 15 is formed in a portion facing the light emitting unit 14 on the back surface of the lower storage case 10.
- the light emitting unit 14 can irradiate the inside of the lower storage case 10 with visible light through the opening 15.
- a material having a property of transmitting visible light emitted from the light emitting unit 14 may be used in at least a portion corresponding to the opening 15 of the lower storage case 10.
- the light emitting unit 14 includes two types of light sources, a first light source 16a and a second light source 16b. As described above, the light emitting unit 14 can emit visible light. For this reason, the light emission part 14 is provided with the visible light source which irradiates visible light.
- the first light source 16a and the second light source 16b are visible light sources.
- the first light source 16a and the second light source 16b are configured such that each can be turned on and off independently.
- the first light source 16a emits light having the first wavelength as the center wavelength.
- the second light source 16b emits light having the second wavelength as the center wavelength. Both the first wavelength and the second wavelength belong to the visible light region. However, the second wavelength is different from the first wavelength.
- the first wavelength which is the central wavelength of the first light source 16a, is 500 nm to 700 nm, preferably 600 nm to 700 nm. That is, the light emitted from the first light source 16a is red. Specifically, for example, a red LED can be used as the first light source 16a.
- the second wavelength which is the central wavelength of the second light source 16b, is not less than 500 nm and not more than 560 nm. That is, the light emitted from the second light source 16b is green. Specifically, for example, a green LED can be used as the second light source 16b. That is, the second wavelength is a wavelength shorter than the first wavelength in the visible light region.
- the first light source 16a emits light with the first radiation intensity.
- the second light source 16b emits light with the second radiation intensity.
- the second radiation intensity is different from the first radiation intensity.
- the second radiation intensity is lower than the first radiation intensity.
- the ratio between the first radiation intensity and the second radiation intensity is 2: 1.
- the amount of light and the number of elements constituting the first light source 16a and the second light source 16b provided in the light emitting unit 14 satisfy the relationship as described above with respect to the radiation intensity of the first light source 16a and the second light source 16b. It is selected so that it can.
- the light emitting unit 14 is provided with two elements constituting the first light source 16a and one element constituting the second light source 16b.
- FIG. 5 is a block diagram showing a functional configuration of the control system of the refrigerator 1.
- the control device 8 includes a microcomputer, for example, and includes a processor (CPU) 8a and a memory 8b.
- the control device 8 controls the refrigerator 1 by executing a preset process when the processor (CPU) 8a executes a program stored in the memory 8b.
- the controller 8 receives a temperature detection signal from the thermistor 13 in the vegetable compartment 500. Further, an operation signal from the operation unit 6 a of the operation panel 6 is also input to the control device 8. Further, a detection signal from the door open / close detection switch 12 is also input to the control device 8.
- the control device 8 executes processing for controlling the operations of the compressor 2 and the blower fan 4 so that the inside of the vegetable compartment 500 is maintained at the set temperature based on the input signal. In addition, the control device 8 outputs a display signal to the display unit 6 b of the operation panel 6.
- control device 8 controls the light emitting operation of the light emitting unit 14 by outputting a control signal to the light emitting unit 14.
- the light emitting unit 14 includes the first light source 16a and the second light source 16b.
- the control apparatus 8 can control the lighting state of each of the 1st light source 16a with which the light emission part 14 is equipped, and the 2nd light source 16b.
- the control device 8 controls the operation of the light emitting unit 14 so as to alternately repeat the irradiation step of irradiating light including visible light from the light emitting unit 14 and the non-irradiating step of not irradiating light including visible light from the light emitting unit 14. To do. That is, under the control of the control device 8, the light emitting unit 14 alternately repeats the irradiation process of irradiating light and the non-irradiation process of not irradiating light.
- both the first light source 16a and the second light source 16b are turned on.
- neither the first light source 16a nor the second light source 16b is turned on.
- the duration of each process is preset. For these, the duration of the irradiation process is ⁇ T1, and the duration of the non-irradiation process is ⁇ T2.
- control device 8 controls the light emitting unit 14 so as to be executed in the order of the irradiation process and the non-irradiation process. And after completion
- the control device 8 controls the light emitting unit 14 so that the irradiation process and the non-irradiation process are alternately repeated at a cycle of 24 hours or less. That is, ⁇ T is set to be 24 hours or less. And the light emission part 14 repeats an irradiation process and a non-irradiation process alternately with a period of 24 hours or less.
- the duration ⁇ T2 of the non-irradiation process is set to be equal to or shorter than the duration ⁇ T1 of the irradiation process.
- ⁇ T1 is set to 12 hours and ⁇ T2 is set to 12 hours. In this case, ⁇ T is 24 hours.
- step S101 the control device 8 turns on the first light source 16a and the second light source 16b of the light emitting unit 14.
- the control device 8 resets the value of the timer t for measuring the elapsed time to 0, and starts measuring time by the timer.
- step S103 the control device 8 confirms whether or not the elapsed time t of the timer has reached ⁇ T1. If the timer elapsed time t is not equal to ⁇ T1, the confirmation in step S103 is repeated until the timer elapsed time t reaches ⁇ T1. When the elapsed time t of the timer becomes ⁇ T1, the process proceeds to step S104.
- the above steps S101 to S103 are the irradiation process.
- step S104 the control device 8 turns off the first light source 16a and the second light source 16b of the light emitting unit 14. Then, the process proceeds to step S105, where the control device 8 resets the value of the timer t for measuring the elapsed time to 0 and starts measuring time by the timer.
- step S106 the control device 8 checks whether or not the elapsed time t of the timer has reached ⁇ T2. If the elapsed time t of the timer is not ⁇ T2, the confirmation in step S106 is repeated until the elapsed time t of the timer reaches ⁇ T2. When the elapsed time t of the timer becomes ⁇ T2, the process returns to step S101, and the above steps are repeatedly executed.
- the above steps S104 to S106 are non-irradiation processes.
- CO2 is carbon dioxide
- H2O is water
- 688 kcal is light energy
- C6H12O6 is glucose
- the plant By this photosynthesis reaction of the formula (1), the plant generates oxygen and sugar from carbon dioxide in the atmosphere and water of the plant using light energy.
- This reaction is divided into two stages. The first step is to break down water into hydrogen and oxygen using light energy absorbed by pigments such as chlorophyll contained in leaves, and store chemical energy through the action of enzyme proteins.
- the second step synthesizes glucose using electrons, hydrogen ions and carbon dioxide in the atmosphere. Vegetables with increased glucose are better stored and produce vitamin C from glucose.
- the absorption spectrum of chlorophyll has two light absorption peaks in red (near 660 nm) and blue (near 450 nm), and this wavelength is known to be particularly effective for photosynthesis.
- green 500 to 600 nm
- red light and green light as auxiliary light that match the absorption spectrum
- the amount of light that can be used for photosynthesis can be measured by photosynthesis photon flux density (unit: ⁇ mol / (m ⁇ 2 ⁇ s)).
- the photosynthetic photon flux density represents the number of photons per square meter per second in the wavelength region from 400 nm to 700 nm that can be absorbed by chlorophyll.
- FIG. 8 is a graph showing the results of measuring the rate of change in the amount of vitamin C in a vegetable that was stored in a vegetable room for 3 days and photosynthesized with respect to the photosynthetic photon flux density. From the graph of FIG. 8, it can be seen that as the photosynthetic photon flux density increases, photosynthesis is promoted and vitamin C contained in vegetables tends to increase.
- FIG. 9 is an example showing the amount of energy required when green light and red light have the same photon flux density.
- the same photon flux density can be obtained with lower radiant energy for red light than for green light.
- FIG. 10 shows the radiant energy ratio R / G of green light and red light and the total energy of green light and red light when the sum of the photon flux densities of green light and red light is an arbitrary constant value. This shows the relationship. Under the condition that the sum of the photon flux densities is constant, the total energy decreases as the radiant energy ratio R / G of red light to green light increases.
- FIG. 11 what is shown in FIG. 11 is an example of the amount of energy that gives a total photon flux density equal to that in FIG. 9 when the radiant energy ratio of green light and red light is 1: 2.
- the first light source 16a irradiates red light with the first radiation intensity.
- the second light source 16b emits green light with a second radiation intensity.
- the second radiant intensity is different from the first radiant intensity.
- the second radiant intensity is lower than the first radiant intensity, specifically, the first radiant intensity and the second radiant intensity.
- the ratio is 2: 1.
- the light emitting unit 14 irradiates light with the first radiation intensity from the first light source 16a and simultaneously irradiates light with the second radiation intensity from the second light source 16b. . Therefore, a larger photon flux density can be obtained with a smaller total radiant energy, and photosynthesis of vegetables irradiated with light can be efficiently promoted.
- the amount of radiant energy of light emitted from the first light source 16a and the second light source 16b is fixed, and the first light source 16a satisfies the relationship of the amount of radiant energy as described above.
- the case where the elements constituting the second light source 16b are provided in the light emitting unit 14 in advance has been described.
- the first light source 16a and the second light source 16b can change the light amount, and the control device 8 can use the first light source 16a and the second light source. You may make it satisfy
- the circadian rhythm of the plant autonomously continues for about 24 hours even under conditions where time information such as light-dark cycle is not given.
- time information such as light-dark cycle is not given.
- fruits and vegetables such as vegetables are preserved in a dark environment where no light is irradiated, effects such as improved storage and increased nutrients cannot be obtained because photosynthesis is not performed.
- fruits and vegetables are stored in a bright environment that is continuously irradiated with light, photosynthesis is carried out, but there are problems such as insufficient production of nutrients, reduced photosynthesis rate and photosynthesis ability. May trigger.
- the light emitting unit 14 of the vegetable compartment 500 irradiates the inside of the lower storage case 10 of the vegetable compartment 500 with light including visible light and visible light.
- the non-irradiation process which does not irradiate the light containing is performed by repeating alternately.
- the inside of the lower storage case 10 changes with the passage of time from a light period in which a visible light is irradiated to a bright environment and a dark period in which no visible light is irradiated to a dark environment. That is, in the lower storage case 10, an environment simulating a change in the amount of light in nature due to the rising of the sun in the morning and the setting of the sun at night is realized. Therefore, activities such as photosynthesis in accordance with the circadian rhythm can be promoted for plants such as fruits and vegetables put into the lower storage case 10.
- the circadian rhythm of the plant has a cycle of about 24 hours corresponding to the time when it goes from morning to night and again.
- the circadian rhythm of plants has the characteristic that the phase of the rhythm changes under the influence of ambient light. For example, when light is irradiated in a dark environment to create a bright environment, the rhythm phase shifts to the morning side.
- the non-irradiation process time is shorter than the visible light irradiation process, that is, the dark period in which light is not irradiated is shortened than the light period in which light is irradiated, and the light irradiation period is 24 hours.
- FIG. 12 is a graph comparing the amount of vitamin C after cabbage was stored for 3 days under a plurality of different light irradiation conditions.
- the amount of vitamin C is expressed as a rate of change with the initial amount of vitamin C before storage as 100.
- the light intensity is made equal, and the color included in the light to be irradiated and the irradiation time per day are changed.
- the amount of vitamin C after storage decreased from the initial value (the leftmost graph in FIG. 12).
- the amount of vitamin C after storage increased from the initial value under all conditions irradiated with light.
- the central graph in FIG. 12 when the light is not irradiated, that is, the dark period, and the light irradiation corresponding to the circadian rhythm is performed, after storage As a result, the increased amount of vitamin C was increased (the rightmost graph in FIG. 12).
- the vegetable compartment door 9 is a door that can open and close the vegetable compartment 500 that is a storage compartment.
- the door opening / closing detection switch 12 is a detecting means for detecting opening / closing of the vegetable compartment door 9.
- the control device 8 counts the number of times of opening and closing the vegetable compartment door 9 detected by the door opening / closing detection switch 12 per fixed time, that is, per preset reference time.
- the reference time at this time is, for example, the duration ⁇ T2 of the non-irradiation process.
- the control apparatus 8 controls the light emission part 14 so that a non-irradiation process may be implemented in the time slot
- the door of the refrigerator 1 is often opened and closed before meal preparation or before and after shopping, and is not opened or closed while the user is sleeping or going out. Therefore, changes in the number of times the door is opened and closed in daily life can be patterned and predicted during the day. Therefore, the control device 8 counts the number of times the vegetable compartment door 9 is opened and closed, and stores a time zone in which the number of times the door is opened and closed per fixed time is small in a storage unit (not shown). And a non-irradiation process can be implemented in the time slot
- the phase of the circadian rhythm of the stored fruits and vegetables may change due to the influence of light outside the refrigerator 1. Therefore, by performing the non-irradiation process in the time zone when the opening and closing times of the vegetable compartment door 9 are small, it is possible to secure a dark period in which light is not irradiated to the fruits and vegetables in the lower storage case 10, which is in the circadian rhythm. Light irradiation control can be performed efficiently.
- the user by operating the operation part 6a of the operation panel 6 installed in the refrigerator compartment door 7, the user performs the light irradiation control from the light emitting part 14 and stops (the light emitting part 14 is always turned off). You may enable it to switch.
- the light emitting unit 14 By enabling the user to select whether or not to perform control to turn on the light emitting unit 14 by the operation panel 6, the light emitting unit can be selected to stop when the fruits and vegetables are not stored for a long time or not used for a long period of time. 14 can always be turned off to reduce energy consumption and provide the same usability as a normal refrigerator 1.
- a display such as “light irradiation” may be performed on the display unit 6 b of the operation panel 6.
- the display unit 6b may display such as “lighting” during the visible light irradiation process (light period) and “lighting off” during the non-irradiation process (dark period).
- the display unit 6b may be a display in which the state of light in the cabinet (in the vegetable compartment 500) is replaced by one day of natural light.
- the display unit 6b may display “daytime” during the irradiation process, “night” during the non-irradiation process, and the like in accordance with the process being performed in the light irradiation control.
- the operation panel 6 is not limited to being installed outside the refrigerator 1 but may be installed in a warehouse (storage room). Further, a communication means is provided in the refrigerator 1, and a command is transmitted to the control device 8 of the refrigerator 1 by a portable information terminal (a mobile phone including a smartphone, a tablet terminal, etc.) or an information of the refrigerator 1 through an electric communication line or the like. May be received and displayed. That is, the portable information terminal may be provided with one or both of the functions of the operation unit 6a and the display unit 6b of the operation panel 6.
- a communication means is provided in the refrigerator 1, and a command is transmitted to the control device 8 of the refrigerator 1 by a portable information terminal (a mobile phone including a smartphone, a tablet terminal, etc.) or an information of the refrigerator 1 through an electric communication line or the like. May be received and displayed. That is, the portable information terminal may be provided with one or both of the functions of the operation unit 6a and the display unit 6b of the operation panel 6.
- the refrigerator configured as described above includes a vegetable room 500 that is a storage room for storing food, and a light emitting unit 14 that can irradiate visible light inside the storage room.
- the light emitting unit 14 has a first light source 16a that emits light having a first wavelength in the visible light region as a central wavelength, and a second wavelength in a visible light region shorter than the first wavelength as a central wavelength. And a second light source 16b that emits light. Then, in the irradiation step of irradiating light, the light emitting unit 14 irradiates light with the first radiation intensity from the first light source 16a, and at the same time, the second light source 16b differs from the first radiation intensity. Irradiate light with radiant intensity.
- the second radiation intensity is lower than the first radiation intensity, and specifically, the ratio between the first radiation intensity and the second radiation intensity is 2: 1.
- the ratio between the first radiation intensity and the second radiation intensity is 2: 1.
- FIG. FIGS. 14 to 17 relate to Embodiment 2 of the present invention
- FIG. 14 is a diagram showing a configuration of a light emitting unit provided in the refrigerator
- FIG. 15 is a time of light irradiation control of each light source provided in the light emitting unit of the refrigerator
- FIG. 16 is a flowchart showing the flow of light irradiation control of the refrigerator
- FIG. 17 is a diagram showing an example of comparison of vitamin C amounts when cabbage is stored for 3 days under a plurality of light irradiation conditions.
- the light source 14 is provided with a third light source 16c.
- the first irradiation step of turning on all the third light sources 16c from the first light source 16a, and the first light source 16a and the second light source 16b are turned off by turning off the third light source 16c. It includes two steps of the second irradiation step of lighting up.
- the light emitting unit 14 further includes a third light source 16c in addition to the first light source 16a and the second light source 16b.
- the third light source 16c is a visible light source similar to the first light source 16a and the second light source 16b. These three types of light sources can be turned on and off independently.
- the third light source 16c irradiates light having a third wavelength as a central wavelength.
- the third wavelength belongs to the visible light region.
- the third wavelength is different from both the first wavelength and the second wavelength.
- the third wavelength is shorter than the second wavelength (thus naturally shorter than the first wavelength).
- the third wavelength that is the central wavelength of the third light source 16c is not less than 400 nm and not more than 500 nm. That is, the light emitted from the third light source 16c is blue.
- a blue LED can be used as the third light source 16c.
- the third light source 16c emits light with the third radiation intensity.
- the third radiation intensity is different from both the first radiation intensity and the second radiation intensity.
- the third radiation intensity is lower than both the first radiation intensity and the second radiation intensity.
- the ratio between the first radiation intensity and the third radiation intensity is 5: 1.
- the ratio between the first radiation intensity and the second radiation intensity is 2: 1 as in the first embodiment. Therefore, the ratio of the first radiation intensity, the second radiation intensity, and the third radiation intensity is 10: 5: 2.
- the amount of light and the number of elements constituting the first light source 16a, the second light source 16b, and the third light source 16c provided in the light emitting unit 14 are the same as the radiation intensity of the first light source 16a to the third light source 16c. It is selected so that the relationship can be satisfied. Specifically, here, the light emitting unit 14 is provided with two elements constituting the first light source 16a, and one element constituting each of the second light source 16b and the third light source 16c. Yes.
- the control device 8 controls the operation of the light emitting unit 14 so as to alternately repeat the irradiation step of irradiating light including visible light from the light emitting unit 14 and the non-irradiating step of not irradiating light including visible light from the light emitting unit 14. To do. In the irradiation process, at least one of the first light source 16a, the second light source 16b, and the third light source 16c is turned on. In the non-irradiation step, none of the first light source 16a, the second light source 16b, and the third light source 16c is turned on.
- the irradiation process is further divided into two processes. In the irradiation process, first, the first irradiation process is performed, and then the second irradiation process is performed. That is, the control device 8 controls the light emitting unit 14 to perform the first irradiation process and the second irradiation process in the irradiation process. In the first irradiation step, the control device 8 emits light from all of the first light source 16a, the second light source 16b, and the third light source 16c. That is, red light, green light, and blue light are irradiated.
- the control device 8 emits light from the first light source 16a and the second light source 16b, and the third light source 16c is turned off. That is, red light and green light are irradiated, and blue light is not irradiated.
- the duration of each process is preset. For these, the duration of the first irradiation step is ⁇ T1, the duration of the second irradiation step is ⁇ T2, and the duration of the non-irradiation step is ⁇ T3.
- control device 8 controls the light emitting unit 14 so as to be executed in the order of the first irradiation step, the second irradiation step, and the non-irradiation step. And after completion
- the control device 8 controls the light emitting unit 14 so that the visible light irradiation process and the non-irradiation process are alternately repeated at a cycle of 24 hours or less. That is, ⁇ T is set to be 24 hours or less. Further, the duration ⁇ T3 of the non-irradiation process is set to be equal to or shorter than the duration of the visible light irradiation process. That is, the non-irradiation process duration ⁇ T3 is set to be equal to or shorter than the total time of the first irradiation process duration ⁇ T1 and the second irradiation process duration ⁇ T2.
- the duration ⁇ T1 of the first irradiation step is set to be equal to or shorter than the duration ⁇ T2 of the second irradiation step.
- ⁇ T1 is set to 2 hours
- ⁇ T2 is set to 10 hours
- ⁇ T3 is set to 12 hours.
- ⁇ T is 24 hours.
- step S201 the control device 8 turns on the first light source 16a, the second light source 16b, and the third light source 16c of the light emitting unit 14.
- step S202 the control device 8 resets the value of the timer t for measuring the elapsed time to 0, and starts measuring time by the timer.
- step S203 the control device 8 checks whether or not the elapsed time t of the timer has reached ⁇ T1. If the timer elapsed time t is not equal to ⁇ T1, the confirmation in step S203 is repeated until the timer elapsed time t reaches ⁇ T1. When the elapsed time t of the timer becomes ⁇ T1, the process proceeds to step S204.
- the above steps S201 to S203 are the first irradiation process.
- step S204 the control device 8 turns off the third light source 16c of the light emitting unit 14. Therefore, only the first light source 16a and the second light source 16b are turned on.
- step S205 the control device 8 resets the value of the timer t for measuring the elapsed time to 0, and starts measuring time by the timer.
- step S206 the control device 8 confirms whether or not the elapsed time t of the timer has reached ⁇ T2. If the elapsed time t of the timer is not ⁇ T2, the confirmation in step S206 is repeated until the elapsed time t of the timer reaches ⁇ T2. If the elapsed time t of the timer becomes ⁇ T2, the process proceeds to step S207.
- the above steps S204 to S206 are the second irradiation process.
- step S207 the control device 8 turns off the first light source 16a and the second light source 16b of the light emitting unit 14. Accordingly, all of the first light source 16a, the second light source 16b, and the third light source 16c are turned off. Then, the process proceeds to step S208, and the control device 8 resets the value of the timer t for measuring the elapsed time to 0, and starts measuring time by the timer.
- step S209 the control device 8 checks whether or not the elapsed time t of the timer has reached ⁇ T3. If the elapsed time t of the timer is not ⁇ T3, the confirmation in step S209 is repeated until the elapsed time t of the timer reaches ⁇ T3. When the elapsed time t of the timer becomes ⁇ T3, the process returns to step S201, and the above steps are repeatedly executed.
- the above steps S207 to S209 are non-irradiation steps. Other configurations and operations are the same as those in the first embodiment, and detailed description thereof is omitted.
- the first light source 16a emits red light with a first radiation intensity.
- the second light source 16b irradiates the green light with the second radiation intensity.
- the 3rd light source 16c irradiates blue light with the 3rd radiation intensity.
- the third radiation intensity is lower than the first and second radiation intensities, and specifically, the ratio of the first, second and third radiation intensities is 10: 5: 2.
- the light emitting unit 14 irradiates light with the first radiation intensity from the first light source 16a and simultaneously irradiates light with the second radiation intensity from the second light source 16b. At the same time, light is emitted from the third light source 16c with the third radiation intensity.
- the longer the wavelength of the irradiated light the greater the number of photons contained in the light. Therefore, a larger photon flux density can be obtained with a smaller total radiant energy, and photosynthesis of vegetables irradiated with light can be efficiently promoted.
- the absorption spectrum of chlorophyll has a light absorption peak in blue (near 450 nm) in addition to red (near 660 nm), and this wavelength is particularly effective for photosynthesis.
- Blue light also has the effect of opening the pores of plants. Therefore, the pores of fruits and vegetables can be opened by irradiating light containing blue at the initial stage of the light period of irradiating light. Then, by continuing the light period after opening the pores of the fruits and vegetables, the fruits and vegetables can sufficiently take in carbon dioxide in the air and can efficiently perform photosynthesis.
- blue light also has an effect of promoting germination and flowering. For this reason, when aiming at long-term preservation of fruits and vegetables, it is better to shorten the time for irradiating blue light as much as possible.
- the third light source 16c is turned on in the first irradiation process and irradiated with light containing blue, and then the third light source 16c is turned off in the second irradiation process.
- photosynthesis can be performed after opening the pores of the fruits and vegetables in the lower storage case 10, thereby further promoting the photosynthesis of the fruits and vegetables in the lower storage case 10. It is possible.
- the first irradiation step of irradiating light containing blue is made shorter than the second irradiation step of irradiating light not containing blue, thereby promoting germination and flowering as much as possible, and Sufficient pore opening action can be obtained.
- FIG. 17 is a graph comparing the amount of vitamin C after cabbage was stored for 3 days under a plurality of different light irradiation conditions. Since the expression method of the vitamin C amount, the light irradiation conditions, and the non-irradiation results are the same as those in FIG.
- the refrigerator configured as described above, in addition to being able to achieve the same effects as those of the first embodiment, it is possible to obtain sufficient pore opening action without promoting germination and flowering as much as possible. In addition, more efficiently promoting the production of nutrients by photosynthesis and suppressing excessive transpiration, it is possible to preserve vegetables in high quality.
- FIG. FIG. 18 relates to Embodiment 3 of the present invention and is a diagram illustrating a configuration of a light emitting unit provided in the refrigerator.
- the second radiant intensity that is, the radiant intensity of green light is set to be higher than the first radiant intensity, that is, the radiant intensity of red light, in the configuration of the first or second embodiment. It is a high one.
- the refrigerator according to the third embodiment will be described based on the configuration of the second embodiment with a focus on differences from the second embodiment. That is, as shown in FIG. 18, the light emitting unit 14 includes a first light source 16a, a second light source 16b, and a third light source 16c. These three types of light sources are all visible light sources, and can be turned on and off independently.
- the first light source 16a, the second light source 16b, and the third light source 16c irradiate light having a first wavelength, a second wavelength, and a third wavelength as center wavelengths.
- the first wavelength is 500 nm to 700 nm (preferably 600 nm to 700 nm)
- the second wavelength is 500 nm to 560 nm
- the third wavelength is 400 nm to 500 nm. Therefore, the light emitted from the first light source 16a is red, the light emitted from the second light source 16b is green, and the light emitted from the third light source 16c is blue.
- the first light source 16a, the second light source 16b, and the third light source 16c irradiate light with the first radiation intensity, the second radiation intensity, and the third radiation intensity, respectively.
- the second radiation intensity is higher than the first radiation intensity.
- the ratio between the first radiation intensity and the second radiation intensity is 5: 6.
- the third radiation intensity is the same as that of the second embodiment in that the third radiation intensity is lower than both the first radiation intensity and the second radiation intensity.
- the ratio between the first radiation intensity and the third radiation intensity is 5: 1 as in the second embodiment. Therefore, the ratio of the first radiation intensity, the second radiation intensity, and the third radiation intensity is 5: 6: 1.
- the amount of light and the number of elements constituting the first light source 16a, the second light source 16b, and the third light source 16c provided in the light emitting unit 14 are the same as the radiation intensity of the first light source 16a to the third light source 16c. It is selected so that the relationship can be satisfied. Specifically, here, the light emitting unit 14 is provided with two elements constituting the second light source 16b, and one element constituting each of the first light source 16a and the third light source 16c. Yes.
- the light emitting unit 14 emits light with the first radiation intensity from the first light source 16a, and simultaneously irradiates light with the second radiation intensity from the second light source 16b.
- Light is emitted from the third light source 16c with a third radiation intensity.
- Other configurations and operations are the same as those in the first embodiment or the second embodiment, and detailed description thereof is omitted.
- the first light source 16a, the second light source 16b, and the third light source 16c emit high-intensity light.
- the fruits and vegetables (vegetables) that have received light tend to be photosaturated in the chlorophyll on the front side of the leaf, and the chlorophylls on the inner and rear sides are not photosaturated.
- red when the radiant energy of the first light source 16a (red) is increased, red is absorbed by the chlorophyll on the surface side because the absorption rate in the leaves is relatively high.
- photosynthesis is saturated with light on the surface side of the leaf, most of the energy of red light is dissipated as heat.
- the second light source 16b (green LED) has relatively low absorptance in the leaves, can activate chlorophylls inside and on the back side of the leaves that are not light-saturated, and can promote photosynthesis. It is. Therefore, the second radiation intensity is made higher than the first radiation intensity, that is, by increasing the radiation energy of the second light source 16b (green), the radiation energy from the light source can be efficiently used. Can carry out photosynthesis.
- the refrigerator configured as described above also includes a vegetable room 500 that is a storage room for storing food, and a light emitting unit 14 that can irradiate visible light inside the storage room.
- the light emitting unit 14 has a first light source 16a that emits light having a first wavelength in the visible light region as a central wavelength, and a second wavelength in a visible light region shorter than the first wavelength as a central wavelength. And a second light source 16b that emits light. Then, in the irradiation step of irradiating light, the light emitting unit 14 irradiates light with the first radiation intensity from the first light source 16a, and at the same time, the second light source 16b differs from the first radiation intensity. Irradiate light with radiant intensity.
- the second radiation intensity is higher than the first radiation intensity, and specifically, the ratio of the first radiation intensity to the second radiation intensity is 5: 6. For this reason, the amount of useless light radiation energy that is converted into heat is suppressed, and light radiation energy is efficiently utilized without consuming excess energy, so that vegetables and fruits such as vegetables during storage (particularly leaf vegetables) are preserved. It is possible to promote photosynthesis, promote the production of nutrients, and improve storage properties.
- the present invention can be used in a refrigerator that includes a light-emitting unit in a storage room for storing food and that irradiates visible light from the light-emitting unit to the inside of the storage room.
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Abstract
Description
図1から図13は、この発明の実施の形態1に係るもので、図1は冷蔵庫の正面図、図2は冷蔵庫の縦断面図、図3は図2の野菜室部分を拡大して示した図、図4は冷蔵庫が備える発光部の構成を示す図、図5は冷蔵庫の制御系統の構成を示すブロック図、図6は冷蔵庫の発光部が備える各光源の光照射制御のタイムチャート、図7は冷蔵庫の光照射制御の流れを示すフロー図、図8は光合成光量子密度と3日間キャベツを保存した場合のビタミンC量変化率との関係の一例を示す図、図9は等しい光量子束密度となる緑色光と赤色光のエネルギー量の一例を示す図、図10は緑色光と赤色光の放射エネルギー比R/Gと、緑色光と赤色光の合計エネルギーとの関係を示す図、図11は緑色光と赤色光のエネルギー量比を1:2とした場合に図9と等しい合計光量子束密度となるエネルギー量の一例を示す図、図12は複数の光照射条件下で3日間キャベツを保存した場合のビタミンC量の比較の一例を示す図、図13は冷蔵庫の発光部が備える各光源の光照射制御及び野菜室扉の開閉状態のタイムチャートである。
この発明の実施の形態1に係る冷蔵庫1は、図2に示すように断熱箱体90を有している。断熱箱体90は、前面(正面)が開口されて内部に貯蔵空間が形成されている。断熱箱体90は、外箱、内箱及び断熱材を有している。外箱は鋼鉄製である。内箱は樹脂製である。内箱は外箱の内側に配置される。断熱材は、例えば発泡ウレタン等であり、外箱と内箱との間の空間に充填されている。断熱箱体90の内部に形成された貯蔵空間は、1つ又は複数の仕切り部材により、食品を収納保存する複数の貯蔵室に区画されている。
冷蔵庫1は、各貯蔵室へ供給する空気を冷却する冷凍サイクル回路を備えている。冷凍サイクル回路は、圧縮機2、凝縮器(図示せず)、絞り装置(図示せず)及び冷却器3等によって構成されている。圧縮機2は、冷凍サイクル回路内の冷媒を圧縮し吐出する。凝縮器は、圧縮機2から吐出された冷媒を凝縮させる。絞り装置は、凝縮器から流出した冷媒を膨張させる。冷却器3は、絞り装置で膨張した冷媒によって各貯蔵室へ供給する空気を冷却する。圧縮機2は、例えば、冷蔵庫1の背面側の下部に配置される。
図3は、冷蔵庫1が備える野菜室500部分の断面図である。野菜室500は、食品、特に野菜を保存する貯蔵室である。下段収納ケース10は、野菜室扉9のフレーム(図示せず)によって支持されている。下段収納ケース10の上側には、上段収納ケース11が載置されている。野菜室扉9を前方へと引き出すと、下段収納ケース10及び上段収納ケース11が野菜室扉9と一体となって前方へと引き出される。野菜室扉9を引き出した状態で、上段収納ケース11だけを後方へスライドすると、下段収納ケース10だけが引き出された状態となる。下段収納ケース10だけが引き出された状態では、下段収納ケース10に食品を出し入れすることができる。
次に、図4を参照しながら発光部14の構成についてさらに説明する。図4に示すように、発光部14は、第1の光源16a及び第2の光源16bの2種の光源を備えている。前述したように、発光部14は可視光を照射可能である。このため、発光部14は、可視光を照射する可視光源を備えている。第1の光源16a及び第2の光源16bは、可視光源である。これらの第1の光源16a及び第2の光源16bは、それぞれが独立して、点灯及び消灯することができるように構成されている。
図5は、冷蔵庫1の制御系統の機能的な構成を示すブロック図である。この図5には、特に野菜室500の制御に関係する部分が示されている。制御装置8は、例えばマイクロコンピュータを備えており、プロセッサ(CPU)8a及びメモリ8bを備えている。制御装置8は、メモリ8bに記憶されたプログラムをプロセッサ(CPU)8aが実行することにより、予め設定された処理を実行し、冷蔵庫1を制御する。
次に、図6を参照しながら、制御装置8による発光部14の発光動作制御について説明する。制御装置8は、発光部14から可視光を含む光を照射させる照射工程と、発光部14から可視光を含む光を照射させない非照射工程とを交互に繰り返すように発光部14の動作を制御する。すなわち、制御装置8による制御により発光部14は、光を照射する照射工程と、光を照射しない非照射工程とを交互に繰り返す。
次に、以上のような発光部14での光照射により期待される作用について説明する。まず、植物の光合成反応について説明する。光合成反応は次の(1)式で表すことができる。
以上で説明した発光部14の制御では、1日のうちのどの時間帯に照射工程及び非照射工程を実施するのかについては特に言及しなかった。ここでは、発光部14の制御の他の例として、非照射工程を実施する時間帯等の発光部14の制御を野菜室扉9の開閉状態の検知結果に応じて行うようした例について図13を参照しながら説明する。
図14から図17は、この発明の実施の形態2に係るもので、図14は冷蔵庫が備える発光部の構成を示す図、図15は冷蔵庫の発光部が備える各光源の光照射制御のタイムチャート、図16は冷蔵庫の光照射制御の流れを示すフロー図、図17は複数の光照射条件下で3日間キャベツを保存した場合のビタミンC量の比較の一例を示す図である。
すなわち、図14に示すように、発光部14は、第1の光源16a及び第2の光源16bに加えて、第3の光源16cをさらに備えている。第3の光源16cは、第1の光源16a及び第2の光源16bと同じく可視光源である。これら3種の光源は、それぞれ独立して点灯及び消灯することができる。
なお、他の構成及び動作については実施の形態1と同様であって、その詳細説明は省略する。
図18は、この発明の実施の形態3に係るもので、冷蔵庫が備える発光部の構成を示す図である。
ここで説明する実施の形態3は、前述した実施の形態1又は実施の形態2の構成において、第2の放射強度すなわち緑色光の放射強度を、第1の放射強度すなわち赤色光の放射強度より高くしたものである。
すなわち、図18に示すように、発光部14は、第1の光源16a、第2の光源16b及び第3の光源16cを備えている。これら3種の光源は、いずれも可視光源であり、それぞれ独立して点灯及び消灯することができる。
なお、他の構成及び動作については実施の形態1又は実施の形態2と同様であって、その詳細説明は省略する。
2 圧縮機
3 冷却器
4 送風ファン
5 風路
6 操作パネル
7 冷蔵室扉
7a 右扉
7b 左扉
8 制御装置
8a プロセッサ(CPU)
8b メモリ
9 野菜室扉
10 下段収納ケース
11 上段収納ケース
12 扉開閉検知スイッチ
13 サーミスタ
14 発光部
15 開口部
16a 第1の光源
16b 第2の光源
16c 第3の光源
90 断熱箱体
100 冷蔵室
200 切替室
300 製氷室
400 冷凍室
500 野菜室
201 切替室収納ケース
401 冷凍室収納ケース
Claims (13)
- 食品を保存する貯蔵室と、
前記貯蔵室の内部に可視光を照射可能な発光部と、を備え、
前記発光部は、
可視光領域の第1の波長を中心波長とする光を照射する第1の光源と、
前記第1の波長より短い可視光領域の第2の波長を中心波長とする光を照射する第2の光源と、を備え、
光を照射する照射工程において、前記第1の光源から第1の放射強度で光を照射し、同時に、前記第2の光源から前記第1の放射強度と異なる第2の放射強度で光を照射する冷蔵庫。 - 前記第1の波長は、600nm以上700nm以下である請求項1に記載の冷蔵庫。
- 前記第2の波長は、500nm以上560nm以下である請求項1又は請求項2に記載の冷蔵庫。
- 前記第2の放射強度は、前記第1の放射強度より低い請求項1から請求項3のいずれか一項に記載の冷蔵庫。
- 前記第1の放射強度と前記第2の放射強度との比が2:1である請求項4に記載の冷蔵庫。
- 前記第2の放射強度は、前記第1の放射強度より高い請求項1から請求項3のいずれか一項に記載の冷蔵庫。
- 前記第1の放射強度と前記第2の放射強度との比が5:6である請求項6に記載の冷蔵庫。
- 前記発光部は、
前記第2の波長より短い可視光領域の第3の波長を中心波長とする光を照射する第3の光源をさらに備え、
前記照射工程において、前記第1の光源から前記第1の放射強度で光を照射し、同時に、前記第2の光源から前記第2の放射強度で光を照射し、さらに同時に、前記第3の光源から前記第1の放射強度及び前記第2の放射強度のいずれよりも低い第3の放射強度で光を照射する請求項1から請求項7のいずれか一項に記載の冷蔵庫。 - 前記第3の波長は、400nm以上500nm以下である請求項8に記載の冷蔵庫。
- 前記第1の放射強度と前記第3の放射強度との比が5:1である請求項8又は請求項9に記載の冷蔵庫。
- 前記発光部は、前記照射工程と、光を照射しない非照射工程とを交互に繰り返す請求項1から請求項10のいずれか一項に記載の冷蔵庫。
- 前記発光部は、前記照射工程と前記非照射工程とを、24時間以下の周期で交互に繰り返す請求項11に記載の冷蔵庫。
- 前記貯蔵室を開閉可能な扉と、
前記扉の開閉を検知する検知手段と、をさらに備え、
前記発光部は、予め設定された基準時間当たりの前記検知手段により検知された前記扉の開閉回数が予め設定された回数以下である時間帯に、前記非照射工程を実施する請求項11又は請求項12に記載の冷蔵庫。
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JP2017146020A (ja) | 2017-08-24 |
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