KR20100094871A - Refrigerator and control method thereof - Google Patents

Abstract

PURPOSE: A refrigerator and a control method thereof are provided to restrict the breathing of the fruits or the vegetables in a vegetable room and to sterilize the bacteria in the vegetable room with a blue LED. CONSTITUTION: A refrigerator comprises a main body, a vegetable room(200), a visible-ray irradiating apparatus(230), a sensor, and a controller. A storage space shielded by a door is formed in the main body. The vegetable room is formed in the main body. The visible-ray irradiating apparatus irradiates at least two colors of light into the vegetable room. The sensor is installed in the main body or the door and senses the opening and the closing of the door. The controller receives the opening/closing signal of the door from the sensor. If the door is closed, the light of color suitable for sterilizing the vegetable room is irradiated and after a predetermined time, the light of color suitable for encouraging the photosynthesis of the vegetables or the fruits in the vegetable room is irradiated.

Description

Refrigerator and control method thereof

The present invention relates to a refrigerator and a refrigerator control method.

In general, a refrigerator is a home appliance that allows food to be stored at a low temperature in an interior storage space shielded by a door, and is stored by cooling the inside of the storage space using cold air generated through heat exchange with a refrigerant circulating in a refrigeration cycle. It is configured to keep foods in optimal condition.

Such refrigerators are becoming larger and more versatile as the dietary changes and user's preferences are diversified.

Various foods for refrigeration or freezing storage are appropriately stored in shelves, drawers, baskets, etc. provided in the refrigerator, and the drawers, shelves, baskets, etc. partition the interior of the refrigerator to store food having various sizes and storage conditions at low temperature. Make it possible.

On the other hand, in the space partitioned by the storage member provided in the interior, there is provided a vegetable compartment suitable for storing vegetables or fruits. In general, the vegetable chamber is configured in the form of a drawer for easy control of temperature and humidity independently, and various configurations are known in which temperature and humidity can be controlled.

In addition, Korean Patent No. 10-0761355 discloses a refrigerator provided with a photosynthesis unit to which light is irradiated to enable photosynthesis of vegetables stored inside the vegetable compartment, and Korean Patent Application Publication No. 10-2007-0123055 Disclosed is a refrigerator provided with a light emitting unit for maintaining photosynthetic action of vegetables or vegetables stored in the container.

As such, various developments have been made to improve the storage of foods such as vegetables or vegetables stored in the vegetable compartment.

SUMMARY OF THE INVENTION An object of the present invention is to provide a refrigerator that suppresses the respiration of vegetables or fruits and promotes photosynthesis by irradiating a plurality of colors of light simultaneously after irradiating light of a specific color into the inside of the vegetable chamber when the door is shielded.

Another object of the present invention is to provide a refrigerator control method of suppressing the respiration of vegetables or fruits and promoting photosynthesis by irradiating a plurality of colors of light simultaneously after irradiating light of a specific color to the inside of the vegetable chamber when the door is shielded. will be.

A refrigerator according to an embodiment of the present invention includes a main body in which a storage space shielded by a door is formed; A vegetable compartment provided in the main body; A visible light irradiation device for irradiating light of at least two or more colors into the vegetable chamber; An opening / closing detection means provided in the main body or the door and detecting opening / closing of the door; Upon receiving the opening / closing signal of the door from the opening / closing detecting means, when the door is shielded, the light of the color for sterilizing the inside of the vegetable room is first irradiated, and after a set time, It is configured to include a control unit for controlling the light to be irradiated.

And, a refrigerator control method according to an embodiment of the present invention in another aspect, the step of detecting the opening and closing of the door; Lighting a blue LED in a visible light irradiation device for irradiating visible light to the vegetable chamber provided inside the main body when the door is shielded; And after the blue LED is turned on for a predetermined time, the blue LED, the green LED and the white LED are turned on at the same time in the visible light irradiation apparatus.

In addition, the refrigerator control method according to an embodiment of the present invention in another aspect, in the refrigerator control method provided with a visible light irradiation device for irradiating visible light to the vegetable compartment provided in the main body, when the door is shielded the visible light Light of a specific color from the irradiation device is irradiated to the vegetable chamber for a predetermined time, and after a certain time elapses a plurality of colors of light from the visible light irradiation device is characterized in that irradiated to the vegetable chamber at the same time.

According to the refrigerator and the method of controlling the same according to the embodiment of the present invention, the blue LED is turned on for a predetermined time when the refrigerator door is shielded to sterilize bacteria in the vegetable compartment, and at the same time, vegetables or fruits in the vegetable compartment. It is possible to suppress the breathing. After a certain period of time, blue, white, and green LEDs are turned on to maintain photosynthesis of vegetables or fruits in the vegetable compartment.

Therefore, the storage state of the vegetables or fruits in the vegetable room is improved, as well as long-term storage in an excellent state can have an effect of improving the storage performance of food, especially vegetables or fruits.

In addition, when the refrigerator door is opened, the blue, green, and white LEDs are sequentially turned on, so that the operation state of the LEDs can be checked, thereby visually recognizing the storage function.

Therefore, it is possible to increase the confidence in the storage of the food stored in the vegetable compartment, it is possible to check the operating situation by the sequential lighting, there is an effect that can easily take action in case of abnormality.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily added by adding, changing, or deleting other elements. I can suggest.

1 is a front view of a refrigerator according to an embodiment of the present invention, Figure 2 is a front view of the door of the refrigerator is opened according to an embodiment of the present invention.

Referring to these drawings, the refrigerator 1 is formed in a substantially rectangular parallelepiped shape, and is externally formed by a main body 10 having a storage space therein and a door 40 that selectively shields the opened front surface of the main body 10. Is formed.

The interior of the main body 10 is divided into left and right sides by the barrier 12 to form the freezing chamber 20 and the refrigerating chamber 30, respectively. The door 40 includes a refrigerator compartment door 50 that shields the refrigerator compartment 30 and a freezer compartment door 60 that shields the freezer compartment 20. The door 40 is configured to be opened and closed by rotating to both left and right sides, respectively.

The upper side of the main body 10 is provided with an opening and closing detection means 100 for selectively contacting when opening and closing the door 40 to detect the opening and closing of the door 40. The opening and closing detection means 100 is electrically connected to the control unit 400 to transmit the opening and closing signal to the control unit 400 to be described below.

In addition, the refrigerating compartment door 50 may be provided with a home bar 52 for taking out or inserting frequently accessed food items without opening and closing the refrigerating compartment door 50 from the outside, and the freezing compartment door 60 may be ice-making. A dispenser 62 may be provided to withdraw ice or purified water from the device 22.

On the other hand, the dispenser 62 is provided with a display 64 showing an operating state of the refrigerator and operation means 66 for adjusting the operation of the refrigerator 1, and the display 64 and the operation means 66. Through it is configured to enable the display and operation of the state of the visible light irradiation apparatus 230 to be described below.

In the refrigerating compartment 30 and the freezing compartment 20, a plurality of shelves 14, a drawer 16, and the like for storing food are provided, including an ice maker 22, and these shelves 14 and a drawer ( 16) the inner space of the refrigerating compartment and the freezing compartment is partitioned to form a space in which food can be stored. In addition, a plurality of baskets 18 are mounted on the rear surface of the door 40 to accommodate food.

In particular, one side of the refrigerating chamber 30 is provided with a vegetable chamber 200 to form an independent space suitable for storage of vegetables or fruits. The vegetable chamber 200 is configured in a drawer type to provide a storage space, and is provided independently of other storage spaces in the refrigerating chamber 30.

Figure 3 is a partial front view showing the vegetable compartment drawer of the refrigerator according to the embodiment of the present invention in a separated state, Figure 4 is an exploded perspective view showing the configuration of the vegetable compartment according to the embodiment of the present invention. And, Figure 5 is a block diagram showing a signal flow for the composition of the visible light irradiation apparatus according to an embodiment of the present invention.

With reference to these drawings in more detail with respect to the vegetable chamber 200, the vegetable chamber 200 is a vegetable chamber case 210 that provides a space that is opened forward and withdrawable in and out of the vegetable chamber case 210 And a visible light irradiation device 230 for irradiating visible light to the vegetable room 200.

In detail, the vegetable compartment case 210 is mounted inside the refrigerating compartment 30 to form an outer shape of the vegetable compartment 200, and is formed in a rectangular parallelepiped shape having an approximately front surface opening. The vegetable compartment case 210 is in contact with the drawer 16 below the vegetable compartment 200 and the shelf 14 above the vegetable compartment 200, and is in contact with the left and right wall surfaces of the refrigerating compartment 30.

Drawer in and out guides 212 are formed on the left and right sides of the vegetable compartment case 210 to guide the withdrawal of the vegetable compartment drawer 220, and the visible light irradiation device 230 is formed on the rear side of the vegetable compartment case 210. Transmissive portion 214 is formed to allow the visible light irradiated from to flow into the inside of the vegetable chamber (200).

The transmission part 214 is formed on at least a part of the rear surface of the vegetable compartment case 210, is formed to be open, or formed transparent or translucent so that the light emitted from the outside can be transmitted to the inside of the vegetable chamber 200 do.

In addition, the transmission part 214 may be formed in the form of a convex or concave lens, if necessary, according to the shape of the lens to transmit light evenly to the entire interior of the vegetable chamber 200 or to intensively irradiate light to the area. It can be configured to be.

The magic crisper 216 is provided on an upper surface of the vegetable chamber case 210. The magic crisper 216 is a lattice-shaped groove is formed continuously on the entire surface, the moisture generated in the vegetable chamber 200 is formed on the magic crisper 216 by the surface tension is the vegetable chamber ( 200) is configured to maintain a constant humidity inside.

The vegetable compartment drawer 220 is formed in the same shape as a general drawer, at least the rear and left and right sides are formed of a transparent or semi-transparent material so that the light irradiated from the visible light irradiation device 230 can be irradiated to the storage space. Is formed. Of course, when the entire vegetable compartment drawer 220 is formed of an opaque material, the vegetable chamber drawer 220 may be opened in a shape corresponding to the transmission part 214 so that visible light may be irradiated into the storage space.

In addition, left and right sides of the vegetable compartment drawer 220 are provided with guide rails 222 corresponding to the draw-out guide 212. The guide rail 222 may protrude outward and move forward and backward from the inside of the draw in and out guides 212, and the vegetable chamber may be located at one side of the draw in and out guides 212 and / or the guide rails 222. A roller 224 may be further provided to facilitate the sliding of the drawer 220.

Meanwhile, a gasket (226 in FIG. 6) for sealing the inside of the vegetable compartment case 210 is provided at the front of the vegetable compartment case 210 or at the rear of the vegetable compartment drawer 220, which is in contact with each other when the vegetable compartment drawer 220 is brought in. It may be further provided, when the gasket 226 is compressed is configured so that a part of the internal air of the vegetable compartment case 210 can be degassed.

The visible light irradiation apparatus 230 is provided at one side of the rear of the vegetable chamber 200 corresponding to the transmission unit 214 to irradiate visible light into the vegetable chamber 200. Of course, the visible light irradiation device 230 may be installed on the rear wall surface of the main body 10, may be formed inside the vegetable chamber case 210 as necessary. In addition, the visible light irradiation device 230 is any position that can irradiate the visible light to the inside of the vegetable chamber 200, such as the left and right sides or the upper and lower surfaces of the vegetable chamber case 210, not the rear of the vegetable chamber case 210. Can also be mounted.

The visible light irradiation device 230 is formed on the front of the case 232, the case 232 is mounted, the LED 300 for irradiating light of a plurality of colors and the LED 300 to the LED 300 It is configured to include an LED cover 234 to protect.

The LED 300 may be configured in plural or number corresponding to each color so as to irradiate light of various colors. The plurality of LEDs 300 may be mounted on one PCB 310 or may be configured as a light emitting diode.

In detail, the LED 300 of the visible light irradiation apparatus 230 includes a blue LED 320 for irradiating blue light, a green LED 330 for irradiating green light, and a white LED 340 for irradiating white light. It is composed.

Each of the blue LEDs 320, the green LEDs 330, and the white LEDs 340 is provided with at least one, and each of the LEDs 300 may be arranged in the same color in succession, and different colors may be adjacent to each other. It may be arranged.

The wavelength of light emitted from the plurality of LEDs 300 is 375 nm to 675 nm, and the wavelength of light emitted from the blue LEDs 320 may be 375 nm to 475 nm, and may include a portion of light of adjacent colors including blue. It is desirable to have.

In addition, the blue LED 320 is operated when the door (hereinafter, the refrigerator compartment door 50) is shielded and is turned on, the light irradiated by the blue LED 320 is a microorganism inside the vegetable chamber 200 It can be sterilized, not only to suppress the respiration of vegetables or fruits stored in the vegetable compartment 200, but also to promote photosynthesis to create an environment for the storage of food at the beginning of the storage of vegetables or fruits stored in the vegetable compartment It becomes possible.

The blue LEDs 320, the green LEDs 330, and the white LEDs 340 are simultaneously turned on after a predetermined time after the blue LEDs 320 are turned on, and the plurality of colors are combined into the vegetable chamber 200. Irradiate light to maintain photosynthesis.

As such, the plurality of LEDs 300 provided in the visible light irradiation apparatus 230 are controlled by the control unit 400, and the opening and closing of the door 50 detected by the opening / closing detecting means 100. Depending on the signal, lighting and turning off can be adjusted.

The case 232 is configured to be mounted to the LED 300, a plurality of perforations 236 are formed on the front surface so that the plurality of LED 300 is penetrated to irradiate light forward do. A reflector 238 reflecting light emitted from the LED 300 may be further formed on the front surface of the case 232 through which the LED 300 penetrates.

The LED cover 234 is mounted to the case 232, is formed to be transparent or translucent so that the light can be transmitted, it may be formed in a lens shape so that the transmitted light can be dispersed.

Hereinafter, the operation of the refrigerator according to the embodiment of the present invention having the configuration as described above will be described.

6 is a state diagram showing an operating state of a visible light irradiation apparatus according to an embodiment of the present invention, Figure 7 is a flow chart of a refrigerator control method according to an embodiment of the present invention. And, Figure 8 is a graph showing the operating state of the visible light irradiation when opening and closing the door according to an embodiment of the present invention.

Referring to these drawings, while the refrigerator 1 is in operation, the door 50 is rotated to be opened to store vegetables or fruits in the vegetable chamber 200. Simultaneously with the opening of the door 50, the opening and closing of the door 50 is detected by the opening and closing detecting means 100 provided in the main body 10.

The opening / closing detection means 100 transmits an open signal of the door 50 detected by the control unit 400. Then, when the open signal of the door 50 is transmitted to the control unit 400, the control unit 400 drives the visible light irradiation device 230. [Door opening detection step (S100)]

At this time, the visible light irradiation device 230 is sequentially turned on and off the blue LED 320, the green LED 330 and the white LED 340. In this case, each of the LEDs 300 is turned on and off at approximately 2 second intervals, and after each of the LEDs 300, all of the LEDs 300 may be turned off or on.

Through the sequential operations of the blue LEDs 320, the green LEDs 330, and the white LEDs 340, the user may check whether each of the LEDs 300 operates normally. Visualization is possible to recognize the color of the entire LED 300 to be irradiated.

If necessary, the blue LED 320, the green LED 330, and the white LED 340 may be sequentially turned on and off continuously until the door 50 is closed. Step (S100)]

On the other hand, the withdrawal of the vegetable compartment drawer 220 after the withdrawal of the vegetable compartment drawer 220 in the door 50 is opened. When the vegetable chamber drawer 220 is drawn in, as the gasket 226 is compressed, a portion of the air inside the vegetable chamber 200 is discharged to the outside, and the vegetable chamber 200 is sealed.

After the vegetable chamber drawer 220 is completely drawn in, the user closes the door 50. When closing the door 50, the opening and closing detection means 100 and the door 50 is in contact with each other to detect the shielding of the door 50, [door shielding detection step (S200)]

The shielding signal of the door 50 sensed by the open / close detection means 100 is transmitted to the controller 400, and the controller 400 drives the blue LED 320 of the visible light irradiation apparatus 230. Let's go.

The blue LED 320 is operated for a predetermined time after the door 50 is shielded to irradiate the light of the blue LED 320 into the inside of the vegetable chamber 200. In this case, the set time may be set to about 15 minutes, so that the set time can be continuously driven until the temperature in the refrigerator is lowered to the set temperature.

The blue LED 320 sterilizes bacteria and bacteria in the vegetable chamber 200 that can be activated by elevated internal temperature due to the inflow of outside air by the opening of the door 50, and photosynthesis of vegetables and fruits Open the pores of the vegetable or fruit to be made smoothly. [1st irradiation step (S300)]

On the other hand, after the blue LED 320 is operated for a predetermined time while the door 50 is closed, the blue LED 320 and the green LED 330 of the visible light irradiation device 230 in the control unit 400 And all the white LEDs 340 are turned on at the same time. Accordingly, light of various colors irradiated from the visible light irradiation device 230 may be combined to be irradiated into the vegetable chamber 200.

That is, all the LEDs 300 of the visible light irradiation apparatus 230 are turned on, and the temperature in the refrigerator is in a stable state of maintaining the set temperature. The visible light irradiation apparatus 230 maintains a state in which both the blue LED 320, the green LED 330, and the white LED 340 are turned on until the door 50 is opened again. Investigation step (S400)]

On the other hand, when food is not stored in the vegetable chamber 200 and the operation of the visible light irradiation apparatus 230 is not necessary, the operation of the visible light irradiation apparatus 230 is operated by the operation of the operation means 66. You can also turn it off.

In addition, the manipulation means 66 may be any operation of the visible light irradiation device 230, the display of the state of the vegetable chamber 200 by the driving of the visible light irradiation device 230 64 may also be possible.

9 is a graph showing a state change of the stored vegetables or fruits according to the irradiation form of the visible light irradiation apparatus according to an embodiment of the present invention.

Referring to the drawings, if the blue LED 320, the green LED 330 and the white LED 340 after irradiating the blue LED 320 to the inside of the vegetable chamber for a predetermined time, the emission of CO ₂ It can be seen that the combination of these different colors of light is less. Therefore, it can be seen that the respiratory volume of the vegetables or fruits stored in the vegetable chamber 200 is the least.

In addition, when the blue LED 320, the green LED 330 and the white LED 340 after irradiating the inside of the vegetable chamber 200 for a predetermined time, chlorophyll (Chlorophyll, Chlorophyll) It can be seen that the emission of is higher than when combined with different colors of light. Therefore, it can be seen that the photosynthesis of vegetables or fruits stored in the vegetable chamber 200 can be promoted more.

As such, after irradiating the blue LED 320 to the inside of the vegetable chamber 200 by the visible light irradiation device 230 for a predetermined time, the blue LED 320, the green LED 330, and the white LED 340 are disposed. When irradiated, the respiratory volume of the vegetables or fruits in the vegetable chamber 200 may be reduced while promoting photosynthesis, thereby preventing aging of the vegetables or fruits.

10 is a graph showing the weight change of each vegetable or fruit stored in the vegetable compartment according to an embodiment of the present invention, after putting the bok choy in the vegetable compartment according to the embodiment of the present invention, the change in weight according to the date is visible It shows in comparison with the case where a light beam is irradiated to a vegetable chamber.

Referring to the drawing, when only visible light is continuously irradiated to the vegetable chamber 200, the weight decreases to a certain level until about 3 days, and after about 4 days, it exceeds the allowable threshold of weight loss 8%, and 3 days Since the weight change proceeds more rapidly, the weight change of about 40% occurs after 14 days.

On the other hand, when the blue LED 320, the green LED 330 and the white LED 340 are irradiated at a time after a predetermined time irradiation of the blue LED 320, the change in weight is relatively very small, only after about 14 days The allowable threshold of weight loss is reached, 8%.

As such, when the blue LED 320, the green LED 330, and the white LED 340 are irradiated at the same time after the predetermined time irradiation of the blue LED 320, the storage performance of the vegetable room becomes even more excellent.

1 is a front view of a refrigerator according to an embodiment of the present invention.

2 is a front view of an open door of a refrigerator according to an embodiment of the present invention.

Figure 3 is a partial front view showing the vegetable compartment drawer of the refrigerator according to the embodiment of the present invention separated.

Figure 4 is an exploded perspective view showing the configuration of the vegetable compartment according to an embodiment of the present invention.

5 is a block diagram showing a signal flow for the composition of the visible light irradiation apparatus according to an embodiment of the present invention.

6 is a state diagram showing an operating state of a visible light irradiation apparatus according to an embodiment of the present invention.

7 is a flowchart illustrating a refrigerator control method according to an embodiment of the present invention.

8 is a graph showing an operating state of the visible light irradiation device when opening and closing the door according to an embodiment of the present invention.

9 is a graph showing a state change of the stored vegetables or fruits according to the irradiation form of the visible light irradiation apparatus according to an embodiment of the present invention.

10 is a graph showing the weight change of each vegetable or fruit stored in the vegetable compartment according to an embodiment of the present invention.

Claims (22)

A main body in which a storage space shielded by the door is formed; A vegetable compartment provided in the main body; A visible light irradiation device for irradiating light of at least two or more colors into the vegetable chamber; An opening / closing detection means provided in the main body or the door and detecting opening / closing of the door; Upon receiving the opening / closing signal of the door from the opening / closing detecting means, when the door is shielded, light of color for sterilizing the inside of the vegetable room is first irradiated, and after a set time, the color of the color for promoting photosynthesis of the vegetable or fruit inside the vegetable room Refrigerator comprising a control unit for controlling the light to be irradiated. The method of claim 1, The vegetable compartment is provided in the drawer, characterized in that the drawer in the vegetable compartment. The method of claim 2, The vegetable compartment is characterized in that the inside air is degassed when the drawer of the vegetable compartment drawer is sealed. The method of claim 1, The visible light irradiation device is a refrigerator, characterized in that provided in the body behind the vegetable chamber. The method of claim 4, wherein One side of the vegetable chamber corresponding to the visible light irradiation device is a refrigerator, characterized in that the transmission unit for transmitting the visible light to be irradiated to the inside of the vegetable chamber is further provided. The method of claim 1, The refrigerator of the plurality of colors of the visible light irradiation device is irradiated by combining a predetermined time after the shielding of the door. The method of claim 1, The visible light irradiation device, characterized in that the refrigerator comprises a number of LEDs (LED) corresponding to the number of colors of light to be irradiated. The method of claim 1, The visible light irradiation device, A blue LED operated for a set time when the door is shielded, And a green LED and a white LED operating together with the blue LED after a set time has elapsed. The method of claim 1, The visible light irradiation device, It consists of the blue LED, white LED, green LED, When the door is opened, the blue LED, the white LED, and the green LED are sequentially turned on. The blue LED is turned on for a predetermined time when the door is shielded, And a blue LED, a white LED, and a green LED are turned on at the same time after a set time elapses. 10. The method according to claim 8 or 9, The wavelength of the light irradiated from the blue LED is characterized in that the refrigerator is 375nm ~ 475nm. 10. The method according to claim 8 or 9, The LED is a refrigerator, characterized in that provided with a plurality of each color. The method of claim 1, And a wavelength of light emitted from the visible light irradiation device is 375 nm to 675 nm. Detecting opening and closing of the door; Lighting a blue LED in a visible light irradiation device for irradiating visible light to the vegetable chamber provided inside the main body when the door is shielded; And lighting the blue LED, the green LED, and the white LED at the same time in the visible light irradiation apparatus after the blue LED is turned on for a predetermined time. The method of claim 13, And lighting the blue LED, the green LED, and the white LED sequentially into the inside of the vegetable chamber by the visible light irradiation device when the door is opened. The method of claim 14, And after the blue LED, the green LED, and the white LED are sequentially turned on, all of them are turned off. The method of claim 14, And after the blue LED, the green LED, and the white LED are sequentially turned on, all of them are turned on and maintained until the door is shielded. The method of claim 13, The blue LED when the door is shielded, the refrigerator control method characterized in that the lighting for a set time. The method of claim 13, The blue LED when the door is shielded, the refrigerator control method characterized in that the lighting until the internal temperature reaches a set temperature. The method of claim 13, The wavelength of the light irradiated from the blue LED is a refrigerator control method, characterized in that 375nm ~ 475nm. In the refrigerator control method provided with a visible light irradiation device for irradiating visible light to the vegetable chamber provided in the main body, When the door is shielded, light of a specific color is emitted from the visible light irradiation device to the vegetable chamber for a predetermined time, and after a predetermined time, a plurality of colors of light are simultaneously irradiated to the vegetable room from the visible light irradiation apparatus. How to control the refrigerator. The method of claim 20, When opening the door, the refrigerator control method characterized in that the light of the plurality of colors of the visible light irradiation apparatus is sequentially turned on and off so that the operation state can be confirmed. The method of claim 20, The visible light irradiation apparatus, the refrigerator control method characterized in that the blue, green and white light is selectively irradiated.

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