KR20110013120A - Refrigerator - Google Patents

Abstract

PURPOSE: A refrigerator is provided to improve deodorization and bacteria removal properties by using a diode for emitting visible rays and a permeable cover with a photocatalyst. CONSTITUTION: A refrigerator comprises a storage room, an outlet, a diode(31) for emitting visible rays, a permeable cover, and shelves(2a,2b,2c). The storage room is installed in a main body of the refrigerator. Cold air is supplied to the storage room through the outlet. The diode is installed on the inner top of the storage room and deodorizes the supplied cold air by radiating light to the shelves. The permeable cover covers the diode and has a photocatalyst. The shelves are installed inside the storage room.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator.

In recent years, with the increase in the capacity of refrigerators, various foods have been stored, and interest in hygiene, decontamination and deodorization in refrigerators has increased. As a structure which disinfects and deodorizes the refrigerator, a structure in which a deodorizing filter or the like is disposed in a cold air passage to remove odors in cold air circulating is known.

Patent Document 1 describes a configuration in which an ultraviolet light emitting diode and a light deodorization catalyst are disposed in a cold air passage. In this configuration, the odor component in the cold air is adsorbed to the photocatalyst, and the photocatalyst is activated by the ultraviolet light emitted from the ultraviolet light emitting diode. The odor adsorbed on the catalyst surface is oxidatively decomposed and deodorized.

In addition, incandescent bulbs and the like have been conventionally used for lighting devices of refrigerators. However, incandescent bulbs have a large amount of heat during light emission, and thus the cooling efficiency is deteriorated. Therefore, light emitting diodes have been used as interior lightings to replace incandescent bulbs. The light emitting diode has a low heat generation and high energy saving. Patent Literature 2 discloses a constitution in which a photocatalyst is coated on a lamp cover in a refrigerator or the like to improve antifouling resistance and antibacterial property in a refrigerator by irradiation with light by a light emitting diode.

Prior art literature

Patent Document 1: Japanese Patent Application Laid-open No. 2003-322460

Patent Document 2: Japanese Patent Application Publication No. 2008-75887

However, in the configurations described in Patent Documents 1 and 2, the light emitting diode has a high directivity and has a characteristic of emitting light directly. Therefore, in order to irradiate light to the whole coating surface of a photocatalyst, it is necessary to use multiple light emitting diodes. Thereby, there existed a subject that heat influence became large or became expensive.

In addition, when a deodorization apparatus is installed in a cold air passage and an ultraviolet light emitting diode is used, the state which deodorizes and disinfects is not visually confirmed directly. Therefore, there existed a subject that it cannot recognize that it was disinfected.

In view of the above problems, an object of the present invention is to obtain a refrigerator having improved deodorization and sterilization performance.

In order to solve the above problems, the present invention provides a storage compartment provided in the refrigerator main body, a discharge port for sending cold air to the storage compartment, and a visible light emitting diode which is installed in front of the center of the depth direction of the upper portion of the storage compartment and irradiates inward. And a translucent cover covering the diode and having a photocatalyst, and a shelf partitioning the inside of the storage compartment and having a photocatalyst, wherein the diode irradiates the cover and the shelf to discharge cold air discharged from the discharge port to the storage compartment. It is characterized by being deodorized.

In addition, a storage compartment provided in the refrigerator main body, a visible light emitting diode that does not include ultraviolet light provided above the storage compartment, a transparent cover covering the diode,

And a shelf partitioning the inside of the storage compartment, wherein the diode is irradiated with a photocatalyst to be excited by light, and is provided on at least one of the resin parts of the shelf or the wall surface of the storage compartment.

In addition, the diode is characterized in that the surface-emitting light emitting diode.

In addition, the diode is characterized in that the irradiation when the door for opening and closing the storage compartment is open.

In addition, the photocatalyst is characterized in that the nano-titanium oxide particles having an average particle diameter of 1 to 100 nanometers are dispersed and coated with transparent or translucent.

Moreover, the said nano titanium oxide particle is 5 to 20 weight% in the said resin component, It is characterized by the above-mentioned.

This invention can obtain the refrigerator which improved the deodorization and disinfection performance.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described, referring drawings. First, with reference to FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the whole structure of the refrigerator of one Embodiment of this invention is demonstrated. 1 is a front view of a refrigerator in a state where a door is removed in an embodiment of the present invention. 2 is a cross-sectional view taken along line A-A of FIG. 1, FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1, and FIG. 4 is a cross-sectional view taken along line C-C of FIG. 3, illustrating a flow of cold air.

The refrigerator comprises the refrigerator main body 1 which has an opening in the front, and the doors 7, 9, 10, and 11 which provided the front opening of the refrigerator main body so that opening and closing was possible. The refrigerator main body 1 is comprised with the urethane foam heat insulating material 1c and the vacuum heat insulating material (not shown) between the outer case 1a made of steel plate, and the inner case 1b made of resin. In addition, the storage chamber 2 includes a plurality of storage chambers in the order of the refrigerating chamber 2, the second freezing chamber 4 arranged side to side and the ice making chamber 3, the first freezing chamber 5, and the vegetable chamber 6. In other words, the refrigerating chamber 2 and the vegetable chamber 6 are partitioned and arranged in the uppermost part, respectively, and between the refrigerating chamber 2 and the vegetable room 6, the 2nd freezer compartment 4 which was partitioned with these two chambers, and a heat insulation. The 1st freezer compartment 5 is arrange | positioned. The refrigerator compartment 2 and the vegetable compartment 6 are storage compartments of a refrigeration temperature range (0 degreeC or more, for example, a temperature range of about 2 degreeC-10 degreeC). The 2nd freezer compartment 4 and the 1st freezer compartment 5 are storage chambers of a freezing temperature range (0 degrees C or less, for example, about -20 degreeC--18 degreeC). These storage chambers 2 to 6 are partitioned by partition walls 1d, 1e, and 1f.

In addition, the partition wall 1e which divides the 2nd freezer compartment 4 and the 1st freezer compartment 5 is provided in the vicinity of the opening of the refrigerator main body 1, ie, in front of the refrigerator main body 1. Accordingly, the second freezing chamber 4 and the first freezing chamber 5 communicate with each other behind the partition wall 1e. Thereby, the temperature of the 2nd freezer compartment 4 and the 1st freezer compartment 5 is set substantially the same.

The front surface of the refrigerator main body 1 is provided with the doors 7, 9, 10 and 11 which can open and close the front opening of each storage compartment. The door 7 of the refrigerating chamber 2 is a revolving door of a so-called French door type in which two sheets of a left door and a right door are provided. Specifically, the left door is rotatably installed by the left and right hinges (not shown) of the refrigerator main body 1, and the right door is rotatable by the upper and lower right hinges (not shown) of the refrigerator main body 1. It is provided and opens and closes the front opening of the refrigerating chamber 2.

An ice making room door (not shown) is a door which opens and closes the front opening of the ice making room 3. The door 9 of the second freezer compartment 4 is a door that opens and closes the front opening of the second freezer compartment 4. The door 10 of the first freezer compartment 5 is a door that opens and closes the front opening of the first freezer compartment 5. The door 11 of the vegetable chamber 6 is a door which opens and closes the front opening of the vegetable chamber 6.

In addition, the ice-making chamber door (not shown) and the doors 9, 10, and 11 are comprised by the drawer-type door, and each container in each storage chamber is taken out with a drawer door.

In the ice-making chamber 3, an automatic ice-making device 23a and a storage container 23b are provided. The storage container 23b is configured to be taken out together with the ice-making chamber door by taking out the ice-making chamber door. In addition, the second freezer compartment 4 is provided with a container 12 for a second freezer compartment. This container 12 is taken out by drawing out the 2nd freezer compartment door 9.

In the first freezing chamber 5, a plurality of containers are provided in the vertical direction. Specifically, between the first container 14 at the lower part in the first freezing chamber 5, the third container 16 at the upper part in the first freezing chamber 5, and between the first container 14 and the third container 16. The second container 15 is provided. Each container depth is the structure which becomes shallow in order of the 1st container 14, the 2nd container 15, and the 3rd container 16. As shown in FIG. Thereby, it can accommodate according to the magnitude | size of the stored food, and can store storage efficiency. The 1st container 14 is mounted in the drawing frame (not shown) of the 1st freezer compartment door 10. As shown in FIG. As a result, the first container 14 enters and exits the inside of the first freezing compartment 5 in association with opening and closing of the first freezing compartment door 10.

A rail (not shown) is provided on the side wall of the inner case 1b of the second freezer compartment 4. When the sliding part (not shown) which installed this rail in the door 9 slides, the door 9 opens and closes. In addition, with the opening and closing of the door 9, the container 12 moves back and forth.

In the refrigerating chamber 2, the multi-stage storage shelves 2a, 2b, 2c, and 2d which consist of a transparent resin plate are provided in the up-down direction so that removal is possible. The lowermost storage shelf 2d is provided in contact with the back and both sides of the inner case 1b, and is formed by partitioning the lowermost space 2e from the upper space between the partition wall 1d and the storage shelf 2d. . In addition, inside the refrigerating compartment door 7, a plurality of stage door pockets 33 are provided, and these door pockets 33 are provided to protrude into the refrigerating compartment 2 when the door 7 is closed. The photocatalytic process is given to the internal components containing these door pockets 33. As shown in FIG. Details will be described later.

In the lowermost space 2e, the ice-making tank 24 for supplying the ice-making water to the ice-making apparatus 23a in order from the left side, and the chilled room 8 of the chilled temperature zone suitable for meat and fish storage are provided. . Instead of the chilled room 8, a structure may be provided in which a reduced pressure storage room is provided to maintain the freshness of food and to preserve the food for a long time.

In the vegetable chamber 6, the some container 6a, 6b is provided. The container 6a is deeper than the container 6b. In addition, the container 6a is provided below the container 6b. That is, it has a two-stage storage structure. As a result, the storage can be classified and stored in the size and type of objects, thereby improving the storage efficiency. Specifically, the container 6b houses relatively small vegetables, vegetables that are tender and crushed. The container 6a accommodates a relatively large vegetable, a hard, hard-to-crush vegetable, and the like.

Moreover, the container 6a, 6b is taken out by taking out the door 11 of the vegetable chamber 6, and it is taken out. In the rear of the vegetable chamber 6, a machine chamber is provided, and a compressor 41 constituting a refrigeration cycle is arranged in the machine chamber.

Next, the cooling structure of each storage chamber is demonstrated. The refrigeration cycle is set in the refrigerator main body 1. The refrigeration cycle is configured by connecting a compressor 41, a condenser (not shown), a capillary tube (not shown), a cooler 18, and a compressor 41 in this order.

The compressor 41 and the condenser are installed in a machine room (not shown) provided in the lower rear side of the refrigerator main body 1. The cooler 18 is installed in the cooler chamber 17 provided behind the ice making chamber 3, the 2nd freezing chamber 4, and the 1st freezing chamber 5, and the cooler 18 in this cooler chamber 17 is carried out. Blower fan 20 is provided above ().

The cold air cooled by the cooler 18 is stored in the refrigerating chamber 2, the second freezing chamber 4, the ice making chamber 3, the first freezing chamber 5, and the vegetable chamber 6 by the blowing fan 20. Is sent to. Specifically, the cold air sent by the blower fan 20 passes through the damper device 19 which can be opened and closed, and a part of the cold air is sent to the storage compartment of the refrigerating temperature zone of the refrigerating compartment 2 and the vegetable compartment 6, and the other part 2 It is sent to the storage chamber of the freezing temperature of the freezing chamber 4, the ice-making chamber 3, and the 1st freezing chamber 5. In addition, opening / closing of the damper apparatus 19 is controlled by the control apparatus which is not shown in figure, and is opened when the cold air is supplied to the refrigerating chamber 2 and the vegetable chamber 6.

The cold air sent to the refrigerating chamber 2, the second freezing chamber 4, the ice making chamber 3, the first freezing chamber 5 and the vegetable chamber 6 by the blowing fan 20 cools each storage chamber, It passes through each cold air return passage (not shown), and returns to the cooler chamber 17. As shown in FIG. Thus, the refrigerator of this embodiment has the circulation structure of cold air, and maintains each storage compartment at appropriate temperature.

The rear panel (not shown) which forms the passage | pass which passes the cold air supplied from the blowing fan 20 is provided in the back surface of the refrigerating chamber 2. This back panel is formed of the material of high thermal conductivity, and is formed from metals, such as aluminum, as an example. Thereby, the load according to the temperature change which affects the stored food by suppressing the temperature change of the refrigerating chamber 2 can be reduced. In addition, when there is little supply of cold air, such as during defrost operation, it can suppress that the temperature in the refrigerating chamber 2 rises by the radiant heat from a back panel.

As a result, the ice making chamber 3, the second freezing chamber 4, and the first freezing chamber 5 are about -20 to -18 deg. C, the refrigerating chamber 2 is about 1 to 3 deg. Each is cooled to 5 ° C. During this cooling operation, if a large amount of frost adheres to the cooler 18, the heat exchange area is reduced and cooling efficiency is lowered. Therefore, the cooling operation is temporarily stopped by the control means (not shown), and the defrost heater 100 is energized to perform the defrosting operation of the cooler 18.

In addition, as shown in FIGS. 3 and 4, the cold air passing through the cold air passage 30 provided on the rear surface of the refrigerating chamber 2 from side to side is discharged from the discharge port 30a to the refrigerating chamber 2. The discharged cold air flows toward the door pocket 33 after passing through the transparent lamp cover 32. When the door 7 is opened, the open state of the door 7 is detected by the sensor which is not shown in figure, and the light emitting diode 31 provided in the ceiling of the refrigerating chamber 2 irradiates the inside of a refrigerator. In addition, the light emitting diode 31 irradiates the lamp cover 32 processed with the photocatalyst to deodorize and sterilize cold air that has passed through the lamp cover 32.

In addition, the light diffused from the lamp cover 32 irradiates a plurality of stages of storage shelves 2a, 2b, 2c, 2d, walls, and the like which are subjected to a photocatalyst as a transparent resin plate.

In addition, the lamp cover 32 and the light emitting diode 31 are provided not in the center of the ceiling in the refrigerating chamber 2 but on the front side in the depth direction close to the door 7, and irradiate light toward the rear surface of the refrigerating chamber 2. It is desirable to. That is, by providing a lighting apparatus near the door 7, even if food is preserved at the top, it is possible to maintain a constant brightness without blocking light by the food.

In addition, by irradiating the light toward the rear surface of the refrigerating chamber 2, not only the visibility of the food stored inside can be improved, but also the amount of light directly entering the eyes of the user when the door 7 is opened and closed can be reduced. It is possible to judge the freshness accurately from the color (hue of tuna, meat, etc.).

In this embodiment, the photocatalyst is treated to the resin parts such as the lamp cover 32, the shelf, the wall surface, and the like to have a bactericidal and deodorizing effect. The cold air sent to the refrigerating chamber 2 has a smaller amount of cold air than the cold air sent to the first freezing chamber 5, and the wind flows moderately. However, since the photocatalyst is processed to the lamp cover 32, the shelf, and the wall surface, the bactericidal and deodorizing action in the refrigerating chamber 2 can be expected. In addition, when the catalyst is coated on the lamp cover 32, since the lamp cover 32 itself is less likely to be contaminated by the photocatalytic reaction, it is possible to suppress a decrease in illuminance due to contamination of the lamp cover 32.

In particular, the resin component is preferably formed of a transparent or translucent resin, whereby the light of the light emitting diode 31 can be efficiently diffused from the lamp cover 32, thereby exhibiting the catalytic action of the nano titanium oxide. , Nano titanium oxide is regenerated.

Next, the light emitting diode 31 of the present embodiment will be described. In the light emitting diode 31 of the present embodiment, it is preferable to use the surface mount type white light emitting diode 31 in which the frame is directly soldered to the surface of the substrate as a light source. Since the light emitting diode 31 uses a thick ribbon-shaped metal wire, it is possible to flow a large current by providing a connection strength, so that it is not necessary to use a sealing material that protects the connection portion and absorbs the light of the chip.

In addition, heat dissipation is improved by using a chip and a metal base having good heat dissipation. In addition, since the package light distribution angle is 100 degrees wide, the light intensity of 10 times higher than that of the shell type light distribution angle (10 degrees to 60 degrees) generally used in the past can be obtained, thereby achieving high illuminance and smooth light. .

That is, when irradiating the same area, the number of light emitting diodes used compared with the shell type can be reduced, and heat influence can be suppressed and cost can be reduced by that much. Moreover, since illumination is high and it is soft light, it is a suitable condition as lighting inside.

In addition, the light emitting diode 31 of the present embodiment can directly check the light by using an eye-friendly visible light emitting diode that does not contain ultraviolet light.

In addition, the light emitting diode 31 of this embodiment is controlled to light up when the refrigerating compartment door 7 is opened. That is, when the door 7 of the refrigerating compartment 2 is opened, light is seen from the lamp cover 32 located at the ceiling of the refrigerating compartment 2, so that the disinfection state can be confirmed, thereby providing a sense of security or cleanliness to the user. It becomes possible.

In addition, the light emitting diode is turned on in the lighting mode even when the door 7 is closed by a control device (for example, installed in the door 7 of the refrigerating chamber 2). In other words, when the interior of the refrigerator is intensively cleaned, a control device (not shown) in the refrigerating compartment door 7 is used to turn on the light emitting diode 31 for a predetermined time even when the refrigerating compartment door 7 is closed for sterilization and deodorization. I can do it. In addition, the state can be confirmed with the control apparatus of the door 7. As shown in FIG.

Next, the coating conditions of the photocatalyst used in a present Example are demonstrated. The photocatalyst used in the present example is coated with uniform titanium oxide particles (hereinafter referred to as "nano titanium oxide") having an average particle diameter of 1 to 100 nanometers on the inner surface of the transparent or translucent resin component.

As resin which disperse | distributes a nano titanium oxide particle, it is necessary to have affinity with a nano titanium oxide dispersion. Since nano titanium oxide is disperse | distributed to the aqueous dispersion medium, it is preferable to water-soluble resin. For example, polymethyl methacrylate resin (PMMA) and the like are preferable.

Moreover, it is preferable that some titanium atoms of nano titanium oxide are substituted or added to nano titanium oxide particles by zinc, silver, iron, etc. which are metal ions. In particular, it is preferable that an iron atom is substituted or added. By separating the reaction and reaction sites of oxidation and reduction on the surface of the nanoparticles in the presence of metal ions, the redox reaction becomes active, thereby improving the deodorization and sterilization efficiency.

Moreover, as for content in the coating film of nano titanium oxide particle, 5 to 15% is especially preferable. When the content in the coating film of the nano-titanium oxide particles is 5% or less, the amount required for the photocatalytic reaction cannot be satisfied, and when the content is 15% or more, the coating film becomes opaque or almost opaque even when the resin to be dispersed is transparent. Could not fully function.

Even if light is not irradiated, deodorization and disinfection are possible by physical adsorption, so that deodorization and disinfection effect can be obtained even when light is not irradiated, such as when the power is not turned on for a long time. In addition, the resins are safe from deterioration.

Next, the result of the deodorization experiment of nano titanium oxide using the lamp cover 32 of this invention is demonstrated. 5 shows the results of a deodorization experiment of nano titanium oxide used in the present invention.

As the sample, a lamp cover 32 formed of a transparent polystyrene resin was coated with titanium oxide particles having an average particle diameter of 1 to 100 nanometers.

In the test conditions, the lamp cover 32 is put in a BOX of 40 L capacity, and the light is shielded so that light from the outside does not enter. In addition, ammonia was charged as a malodorous component, left in contact with nano titanium oxide and allowed to stand for 24 hours, and then the ammonia concentration in the BOX was measured by a detection tube. As an experimental condition, 3 in the case of natural attenuation (symbol 34), when the lamp cover 32 is not irradiated with light (symbol 35), and the lamp cover 32 is irradiated with the light emitting diode 31 (symbol 36). As a condition, the ammonia residual ratio in BOX is shown in FIG.

From the experimental results shown in FIG. 5, the residual ratio of ammonia due to natural attenuation is 33 [%] (symbol 34), and the residual ratio of ammonia when no light is irradiated to the lamp cover 32 is 17 [%] ( Reference numeral 35) and the residual ratio of ammonia in the case of irradiating the lamp cover 32 with the light emitting diode 31 were 3 [%] (reference 36).

As mentioned above, when the residual ratio of ammonia by the natural attenuation (symbol 34) is compared with the residual ratio of ammonia when the lamp cover 32 is not irradiated with light (symbol 35), there is a difference of 1.9 times the deodorizing ability. can do. That is, in the case where the lamp cover 32 is not irradiated with light (symbol 35), the ammonia residual ratio is lower than in the case of natural attenuation (symbol 34). From this, it turns out that the deodorizing effect is exhibited even in the state which does not irradiate light. Thereby, it can be said that the deodorizing effect is exhibited even when there is no door opening and closing for a long time.

In addition, comparing the case of natural attenuation (symbol 34) and the case where the lamp cover 32 is irradiated with the light emitting diode 31 (symbol 36), it can be said that there is a difference in the deodorizing ability 11 times with or without a catalyst and light. This is because it is adsorbed on the deodorizing film and decomposed by the photocatalytic reaction. That is, it can be said that the redox reaction of the photocatalyst was accelerated | stimulated by light irradiation and deodorization was performed.

Next, the photocatalytic reaction was used to confirm whether or not harmful substances were decomposed into water and carbon dioxide. The result of the photocatalytic reaction confirmation test of nano titanium oxide using the lamp cover 32 of this invention is shown in FIG.

Test gas used acetaldehyde (CH ₃ CHO). Acetaldehyde, when decomposed by a photocatalytic reaction, generates carbon dioxide as a decomposition product by a redox reaction. Therefore, it is confirmed whether the photocatalytic reaction is performed by measuring the decrease of acetaldehyde concentration and the increase of carbon dioxide concentration by decomposition.

As a sample, what covered the titanium oxide particle whose average particle diameter is 1-100 nanometers was used for the lamp cover 32 shape | molded with the transparent polystyrene resin.

In the experimental condition, the lamp cover 32 and the light emitting diode 31 were placed in a 5 L Tedra bag having a high gas barrier property, and the light emitting diode 31 was placed on the upper surface of the lamp cover 32 to irradiate light. do. "Tedra" is a registered trademark of DuPont.

The 5L Tedra Bag is shielded from light from outside and filled with acetaldehyde as an odor component, and it is contacted with nano titanium oxide to detect carbon dioxide concentration and acetaldehyde concentration in 5L Tedra Bag over time. Measured. 6 shows the residual ratio 37 of carbon dioxide and the residual ratio 38 of acetaldehyde measured over time.

From the experimental results shown in FIG. 6, it was confirmed that after 7 hours, the residual ratio 37 of carbon dioxide increased and the residual ratio 38 of acetaldehyde decreased.

As mentioned above, it can be said that carbon dioxide increases and acetaldehyde decreases by irradiating the light emitting diode 31 to the lamp cover 32 coated with the nano titanium oxide of a present Example. That is, it can be said that acetaldehyde was decomposed by a photocatalytic reaction.

Next, the examination which improves light irradiation efficiency was performed. Even when light is irradiated using the light emitting diode 31, the light irradiated to the lamp cover 32 slightly varies depending on the location. As a result, the photocatalytic reaction may not be sufficiently performed.

Therefore, by providing the light reflecting means (not shown), it is considered that the portion where the light is not irradiated from the lamp cover 32 is also irradiated by the reflection of the light. That is, the effect of photocatalytic reaction by improving light irradiation efficiency was confirmed. Here, as for the light reflection means, a mirror-like material is preferable, and a sheet such as a mirror or a metal plate or a mirror mat can be mentioned.

Below, the deodorization test result of nano titanium oxide at the time of using light reflection means on the upper surface of the lamp cover 32 of a present Example is shown. In this embodiment, the aluminum plate was processed into a wave shape and used as the light reflecting means on the outside and the inside of the lamp cover 32. Fig. 7 shows test results for confirming deodorization performance of ammonia when the light of the light emitting diode 31 is reflected by using the nano titanium oxide used in the present embodiment. As a sample, what coated the titanium oxide particle whose average particle diameter is 1-100 nanometers was used for the lamp cover 32 shape | molded with the transparent polystyrene resin.

In the test conditions, the lamp cover 32 was placed in a BOX with a capacity of 40 L, and light reflection means was used for the upper and lower surfaces of the lamp cover 32. By using the light reflecting means, it is possible to diffuse the light from the light emitting diode 31 and irradiate the light to the lamp cover 32 efficiently, thereby improving the deodorizing ability.

The 40-liter BOX was shaded to prevent light from entering the outside, filled with ammonia as a malodorous component, left in contact with nano titanium oxide for 24 hours, and the ammonia concentration in the BOX was measured by a detection tube.

7 shows the residual ratio of ammonia (symbol 39) due to natural attenuation, the residual ratio of ammonia (symbol 40) when the light emitting diode 31 is irradiated to the lamp cover 32 and no light reflecting means is used, and the lamp cover. The ammonia residual ratio in BOX under 3 conditions of the residual ratio (symbol 41) of ammonia at the time of irradiating the light emitting diode 31 to (32) using a reflecting plate is shown.

From the experimental results shown in FIG. 7, after 7 hours, the residual ratio of ammonia (symbol 39) due to natural attenuation was 33 [%], the lamp cover 32 was irradiated with the light emitting diode 31 and light reflecting means was used. The remaining ratio (symbol 40) of ammonia when not used is 3 [%], and the remaining ratio (symbol 41) of ammonia when the light emitting diode 31 is irradiated to the lamp cover 32 and the reflector is used is 1 [%]. It became.

As described above, when irradiating the light emitting diode 31 to the lamp cover 32 coated with nano titanium oxide, light is also applied to a location where light such as an end portion of the lamp cover 32 is hard to reach by using light reflecting means. By irradiating, a photocatalytic reaction can act efficiently and can improve a deodorizing ability.

According to the above embodiment, the following effects are obtained. That is, by performing photocatalyst processing on a resin component and irradiating light, cold air in a refrigerating chamber can be disinfected and deodorized, and since the state can be confirmed visually easily, the user can be provided with the feeling of being clean.

In addition, by using the surface-emitting type light emitting diode, the amount of use of the light emitting diode can be reduced more than before, so that the thermal effect can be suppressed and the cost can be reduced, thereby making it possible to efficiently perform the photocatalytic reaction.

In addition, by coating the titanium oxide particles having an average particle diameter of 1 to 100 nanometers, the transparent resin component can be added to the deodorizing function without impairing the transparency.

BRIEF DESCRIPTION OF THE DRAWINGS The front view of the refrigerator in the state which removed the door in one Embodiment of this invention.

2 is a sectional view taken along the line A-A in FIG.

3 is a cross-sectional view taken along line B-B in FIG.

4 is a cross-sectional view taken along line C-C in FIG.

FIG. 5 is a diagram showing a result of a deodorization experiment of a photocatalyst in one embodiment of the present invention. FIG.

FIG. 6 is a diagram showing a test result of confirming photocatalytic reaction in one embodiment of the present invention. FIG.

7 is a graph showing experimental results regarding the residual ratio of ammonia.

<Description of the code>

1: refrigerator body

2: cold storage room

2a, 2b, 2c, 2d: shelf

30: cold passage

31: light emitting diode

32: lamp cover

33: door

Claims (6)

A storage compartment installed in the refrigerator body, A discharge port for sending cold air to the storage chamber, A visible light emitting diode which is installed in front of the center of the upper portion in the storage chamber and irradiates inwardly; A translucent cover covering the diode and having a photocatalyst; Has a shelf partitioning inside the storage compartment and also having a photocatalyst, And the diode irradiates the cover and the shelf so that cold air discharged from the discharge port to the storage compartment is deodorized. A storage compartment installed in the refrigerator body, A visible light emitting diode which does not include ultraviolet light provided above the storage compartment; A transparent cover covering the diode; A shelf partitioning the inside of the storage compartment, A photocatalyst excited by light is provided on at least one of the resin parts of the cover, the shelf, or the wall of the storage compartment where the diode is irradiated. The refrigerator according to claim 1 or 2, wherein the diode is a surface emitting light emitting diode. The refrigerator according to claim 1 or 2, wherein the diode is irradiated when a door for opening and closing the storage compartment is opened. The refrigerator according to claim 1 or 2, wherein the photocatalyst is coated with transparent or translucent nano titanium oxide particles having an average particle diameter of 1 to 100 nanometers dispersed therein. The refrigerator according to claim 5, wherein the nano titanium oxide particles are contained in the resin component in an amount of 5 to 20% by weight.

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