JP5260434B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator.

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

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

  Conventionally, incandescent bulbs have been used for refrigerator lighting devices. However, incandescent bulbs generate a large amount of heat during light emission, and cooling efficiency deteriorates. Therefore, light emitting diodes are used as interior lighting to replace incandescent bulbs. The light emitting diode has a small amount of heat generation and high energy saving. Patent Document 2 describes a configuration in which a photocatalyst is applied to a lamp cover or the like in a refrigerator, and the antifouling property and antibacterial property in the cabinet are enhanced by light irradiation with a light emitting diode.

JP 2003-322460 A JP 2008-75887 A

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

  Moreover, when a deodorizing device is installed in the cold passage and an ultraviolet light emitting diode is used, it is not possible to directly visually confirm the state of deodorizing and sterilizing. Therefore, there was a problem that it was not possible to recognize that the cells were sterilized.

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

In order to solve the above-mentioned problems, the present invention is provided on the left and right sides of the storage room provided in the refrigerator main body, the door for opening and closing the storage room, the door pocket provided in the door, and the back of the storage room. A cold air passage , a discharge port for sending the cold air passing through the cold air passage to the storage chamber , a visible light emitting diode that is provided forward from the center in the depth direction of the upper portion of the storage chamber and irradiates the back A translucent cover that covers the diode and has a photocatalyst, and a shelf that partitions the storage chamber and has a photocatalyst, and the cover has a flow direction of the cold air discharged from the discharge port. After the opening has an opening at an opposing position, the diode irradiates the cover and the shelf, and a part of the cold air discharged from the discharge port to the storage chamber passes through the cover and is deodorized. Toward the door pocket It is, another part of the cool air and said flow isosamples along the shelf.

Further, a storage room provided in the refrigerator body, a door for opening and closing the storage room, a door pocket provided in the door, a cold air passage provided on the left and right of the back of the storage room, and the cold air passage. A discharge port that sends the cool air to the storage chamber, a visible light emitting diode that does not contain ultraviolet light provided in the upper portion of the storage chamber, a translucent cover that covers the diode, and a compartment in the storage chamber And a photocatalyst excited by light is provided on at least one of the resin parts of the cover, the shelf, or the wall surface of the storage chamber on which the diode is irradiated , and the cover is discharged from the discharge port. The diode has an opening at a position opposite to the flow direction of the cool air, the diode irradiates the cover, the shelf or the wall surface of the storage chamber, and a part of the cool air discharged from the discharge port to the storage chamber is In the cover After being deodorized by passing, it flows toward the door pocket, another part of the cool air, characterized in that flow along the shelf.

  Further, the diode is a surface emitting light emitting diode.

  Further, the diode is irradiated when a door for opening and closing the storage chamber is opened.

  Further, the photocatalyst is characterized in that nano-titanium oxide particles having an average particle diameter of 1 to 100 nanometers are dispersed and coated transparently or translucently.

  The present invention can provide a refrigerator with improved deodorization and sterilization performance.

It is a front view of the refrigerator of the state which removed the door in one Embodiment of this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a figure which shows the result of the deodorizing experiment of the photocatalyst in one Embodiment of this invention. It is a figure which shows the test result of photocatalytic reaction confirmation in one Embodiment of this invention. It is a figure which shows the experimental result regarding the residual rate of ammonia.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, an overall configuration of a refrigerator according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, and 4. FIG. 1 is a front view of a refrigerator with a door removed in one embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along the line BB in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line CC in FIG.

  The refrigerator includes a refrigerator main body 1 having an opening at the front, and doors 7, 9, 10, and 11 that are provided so that the front opening of the refrigerator main body 1 can be freely opened and closed. The refrigerator body 1 includes a urethane foam heat insulating material 1c and a vacuum heat insulating material (not shown) between a steel plate outer box 1a and a resin inner box 1b. Moreover, it has several storage rooms in order of the refrigerator compartment 2, the 2nd freezer compartment 4 arrange | positioned from right to left, the ice making room 3, the 1st freezer compartment 5, and the vegetable compartment 6. In other words, the refrigerator compartment 2 is arranged at the top and the vegetable compartment 6 is divided at the bottom, and the refrigerator compartment 2 and the vegetable compartment 6 are separated from both the compartments in an adiabatic manner. A second freezer compartment 4 and a first freezer compartment 5 are arranged. The refrigerated room 2 and the vegetable room 6 are storage rooms in a refrigerated temperature zone (a temperature range of 0 ° C. or higher, and about 2 ° C. to 10 ° C. as an example). The 2nd freezer compartment 4 and the 1st freezer compartment 6 are storage rooms of a freezing temperature zone (it is 0 ° C or less, and a temperature zone of about -20 ° C--18 ° C as an example). These storage chambers 2 to 6 are partitioned by partition walls 1d, 1e, and 1f.

  A partition wall 1 e that partitions the second freezer compartment 4 and the first freezer compartment 5 is provided in the vicinity of the opening of the refrigerator main body 1, that is, in the front portion of the refrigerator main body 1. Therefore, the second freezer compartment 4 and the first freezer compartment 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 about the same setting.

  On the front surface of the refrigerator body 1, doors 7, 9, 10, and 11 that can freely open and close the front opening of each storage room are provided. The door 7 of the refrigerator compartment 2 is a so-called French door type revolving door provided with two pieces of a left door and a right door. Specifically, the left door is rotatably provided by left and upper hinges (not shown) of the refrigerator body 1, and the right door is rotatably provided by right and left hinges (not shown) of the refrigerator body 1. The front opening of the refrigerator compartment 2 is opened and closed.

  The ice making chamber door (not shown) is a door that opens and closes the front opening of the ice making chamber 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 compartment 6 is a door that opens and closes the front opening of the vegetable compartment 6.

  Note that the ice making room door (not shown) and the doors 9, 10, and 11 are constituted by drawer-type doors, and the respective containers in the respective storage chambers are drawn out together with the drawer doors.

  In the ice making chamber 3, an automatic ice making device 23a and an ice storage container 23b are provided. The ice storage container 23b is configured to be pulled out together with the ice making chamber door by pulling out the ice making chamber door. The second freezer compartment 4 is provided with a container 12 for the second freezer compartment. The container 12 is configured to be pulled out by pulling out the second freezer compartment door 9.

  A plurality of containers are provided in the first freezer compartment 5 in the vertical direction. Specifically, the first container 14 is disposed in the lower part of the first freezer compartment 5, the third container 16 is disposed in the upper part of the first freezer compartment 5, and the second container 15 is disposed between the first container 14 and the third container 16. Is provided. The depth of each container becomes a structure which becomes shallow in order of the 1st container 14, the 2nd container 15, and the 3rd container 16. Thereby, it can accommodate according to the magnitude | size of stored foodstuffs, and storage efficiency can be improved. The first container 14 is placed on a drawer frame (not shown) of the first freezer compartment door 10. Thus, the first container 14 enters and exits the first freezer compartment 5 in conjunction with the opening and closing of the first freezer compartment door 10.

  A rail (not shown) is provided on the side wall of the inner box 1b of the second freezer compartment 4. The door 9 is opened and closed by sliding a sliding portion (not shown) provided with the rail on the door 9. Further, as the door 9 is opened and closed, the container 12 moves back and forth.

  In the refrigerator compartment 2, a plurality of storage shelves 2a, 2b, 2c, and 2d made of transparent resin plates are detachably installed in the vertical direction. The lowermost storage shelf 2d is installed in contact with the back surface and both side surfaces of the inner box 1b, and the lowermost space 2e is partitioned from the upper space between the partition wall 1d and the storage shelf 2d. . A plurality of door pockets 33 are installed inside the refrigerator compartment door 7, and these door pockets 33 are provided so as to protrude into the refrigerator compartment 2 when the door 7 is closed. The internal parts including the door pockets 33 are subjected to photocatalytic processing. Details will be described later.

  In the lowermost space 2e, an ice making water tank 24 for supplying ice making water to the ice making device 23a and a chilled room 8 in a chilled temperature zone suitable for storing meat fish are provided in order from the left. Instead of the chilled room 8, a configuration may be adopted in which a decompression storage chamber is provided for maintaining the freshness of food and storing it for a long time by decompressing the room.

  In the vegetable compartment 6, a plurality of containers 6a and 6b are provided. The container 6a has a deeper structure than the container 6b. The container 6a is provided below the container 6b. That is, it has a two-stage storage structure. Thereby, it is possible to classify and store according to the size and type of the stored items, thereby improving the storage efficiency. Specifically, the container 6b stores relatively small vegetables, soft and easily crushed vegetables, and the like. The container 6a stores relatively large vegetables, hard and hard-to-crush vegetables, and the like.

  Moreover, it has the structure where containers 6a and 6b are pulled out by pulling out the door 11 of the vegetable compartment 6. Further, a machine room is provided behind the vegetable room 6, and a compressor 41 constituting a refrigeration cycle is disposed in the machine room.

  Next, the cooling structure of each storage chamber will be described. The refrigerator body 1 is provided with a refrigeration cycle. This 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 at the lower back of the refrigerator body 1. The cooler 18 is installed in a cooler chamber 17 provided behind the ice making chamber 3, the second freezer chamber 4, and the first freezer chamber 5, and the blower fan 20 is disposed above the cooler 18 in the cooler chamber 17. Is installed.

  The cold air cooled by the cooler 18 is sent by the blower fan 20 to the storage rooms of the refrigerator compartment 2, the second freezer compartment 4, the ice making compartment 3, the first freezer compartment 5, and the vegetable compartment 6. Specifically, a part of the cool air sent by the blower fan 20 is sent to a storage room in the refrigerator temperature zone of the refrigerator compartment 2 and the vegetable compartment 6 via the damper device 19 that can be opened and closed. The part is sent to the second freezing room 4, the ice making room 3, and the storage room in the freezing temperature zone of the first freezing room 5. Note that the opening and closing of the damper device 19 is controlled by a control device (not shown), and is opened when it is necessary to supply cold air to the refrigerator compartment 2 and the vegetable compartment 6.

  The cool air sent to the storage rooms of the refrigerator compartment 2, the second freezer compartment 4, the ice making chamber 3, the first freezer compartment 5, and the vegetable compartment 6 by the blower fan 20 is cooled after each storage compartment is cooled. It returns to the cooler chamber 17 through a cold air return passage (not shown). Thus, the refrigerator of this embodiment has a cold air circulation structure, and maintains each storage room at an appropriate temperature.

  A back panel (not shown) that forms a passage through which cool air supplied from the blower fan 20 passes is provided on the back of the refrigerator compartment 2. This back panel is made of a material having high thermal conductivity, and is made of a metal such as aluminum as an example. Thereby, the temperature change of the refrigerator compartment 2 can be suppressed and the load by the temperature change given to the stored foodstuff can be reduced. Moreover, when there is little supply of cold air, such as during a defrost operation, it can suppress that the temperature in the refrigerator compartment 2 raises by the radiant heat from a back panel.

  Thus, the ice making room 3, the second freezing room 4, and the first freezing room 5 are cooled to about -20 to -18 ° C, the refrigerator room 2 is about 1 to 3 ° C, and the vegetable room 6 is cooled to 1 to 5 ° C. Is done. If a large amount of frost adheres to the cooler 17 during this cooling operation, the heat exchange area decreases and the cooling efficiency decreases. Therefore, the cooling operation is temporarily stopped by a control means (not shown), the defrost heater 100 is energized, and the defrost operation of the cooler 18 is performed.

  As shown in FIGS. 3 and 4, the cold air that has passed through the cold air passages 30 provided on the left and right sides of the refrigerating chamber 2 is discharged from the discharge port 30 a to the refrigerating chamber 2. The discharged cool air passes through the translucent lamp cover 32 and then flows toward the door pocket 33. When the door 7 is opened, the open state of the door 7 is detected by a sensor (not shown), and the light emitting diode 31 installed on the ceiling of the refrigerator compartment 2 irradiates the inside of the cabinet. Further, the light emitting diode 31 irradiates the lamp cover 32 in which the photocatalyst is processed, and deodorizes and disinfects the cold air that has passed through the lamp cover 32.

  The light diffused from the lamp cover 32 irradiates a plurality of storage shelves 2a, 2b, 2c, 2d, which are transparent resin plates and provided with a photocatalyst, walls, and the like.

  Further, it is desirable that the lamp cover 32 and the light emitting diode 31 are installed not on the ceiling center in the refrigerator compartment 2 but on the near side in the depth direction near the door 7 and irradiate light toward the back of the refrigerator compartment 2. That is, by installing the lighting device in the vicinity of the door 7, even if food is stored at the uppermost stage, light can be kept without being blocked by the food.

  In addition, by irradiating light toward the back of the refrigerator compartment 2, not only the visibility of food stored in the back is increased, but also the amount of light that is directly visible to the user when the door 7 is opened and closed is reduced. And the freshness can be accurately determined from the original color of the food (such as the color of tuna or meat).

  In the present embodiment, the above-described resin parts such as the lamp cover 32, the shelf, and the wall surface are subjected to a photocatalyst treatment so as to have a sterilizing / deodorizing action. The cool air sent to the refrigerating chamber 2 has a smaller amount of cool air than the cool air sent to the first freezer compartment 5, and the wind flow is gentle overall. However, since the lamp cover 32, the shelf, and the wall surface are processed with a photocatalyst, the sterilization / deodorization action in the refrigerator compartment 2 can be expected. In addition, when a catalyst is applied to the lamp cover 32, the lamp cover 32 itself is less likely to become dirty due to a photocatalytic reaction, so that a decrease in illuminance due to the dirt on the lamp cover 32 can be suppressed.

  The resin component is preferably made of a transparent or translucent resin, so that the light of the light emitting diode 31 can be efficiently diffused from the lamp cover 32, and the catalytic action of nano titanium oxide is exhibited. At the same time, nano titanium oxide is regenerated.

  Next, the light emitting diode 31 of the present embodiment will be described. As the light emitting diode 31 of this embodiment, it is desirable to use a surface-mount type white light emitting diode 31 in which a frame is directly soldered to the surface of a substrate as a light source. Since the light emitting diode 31 uses a thick ribbon-like metal wire, it can have a connection strength and a large current can flow. Therefore, it is not necessary to use a sealing material that protects the connection portion and absorbs light from the chip. .

  In addition, heat dissipation is improved by using a chip and a metal base with good heat dissipation. In addition, since the package light distribution angle is as wide as 100 degrees, by obtaining about 10 times as much light as the bullet-type light distribution angle (10 degrees to 60 degrees) that has been generally used in the past, It becomes possible to realize soft light with high illuminance.

  That is, when irradiating the same area, the number of light emitting diodes to be used can be reduced as compared with the shell type, and accordingly, the thermal effect can be suppressed and the cost can be reduced. In addition, since the illuminance is high and the light is soft, the conditions are suitable for interior lighting.

  Moreover, the light emitting diode 31 of the present embodiment can directly confirm the light with the eyes by using a visible light emitting diode that does not contain ultraviolet light and is gentle on the eyes.

  Further, the light emitting diode 31 of the present embodiment is controlled so as to be lit when the refrigerator door 7 is opened. That is, when the door 7 of the refrigerator compartment 2 is opened, light can be seen from the lamp cover 32 located on the ceiling of the refrigerator compartment 2, so that the sterilization state can be confirmed, giving the user a sense of security and cleanliness. It becomes possible.

  In addition, the light emitting diode can be lit for a predetermined time by setting the lighting mode even when the door 7 is closed by a control device (for example, installed on the door 7 of the refrigerator compartment 2). That is, when the interior of the refrigerator is intensively cleaned, the light emitting diode 31 is lit for a predetermined time even when the refrigerator compartment door 7 is closed by using a control device (not shown) in the refrigerator compartment door 7. Bacteria and deodorization can be performed. The state can be confirmed by the control device of the door 7.

  Next, the coating conditions for the photocatalyst used in this example will be described. The photocatalyst used in this example is a product in which titanium oxide particles having a uniform average particle diameter of 1 to 100 nanometers (hereinafter referred to as “nano titanium oxide”) are coated on the inner surface of a transparent or translucent resin component. .

  The resin for dispersing the nano titanium oxide particles needs to have a good affinity for the nano titanium oxide dispersion. Since nano-titanium oxide is a product dispersed in an aqueous dispersion medium, a product obtained by solubilizing a water-soluble resin is preferable. For example, polymethyl methacrylate resin (PMMA) is desirable.

  Moreover, the thing by which some titanium atoms of nano titanium oxide are substituted with the metal ion zinc, silver, iron, etc. or added to the nano titanium oxide particle is preferable. Particularly preferred are those in which iron atoms are substituted or added. By separating the oxidation and reduction reaction fields on the nanoparticle surface from the presence of metal ions, the oxidation-reduction reaction becomes active, and the deodorization and sterilization efficiency can be improved.

  Furthermore, the content of the nano-titanium oxide particles in the coating film is preferably 5 to 15%, particularly preferably 10%. When the content of the nano-titanium oxide particles in the coating film is 5% or less, the amount required for the photocatalytic reaction cannot be satisfied. When the content is 15% or more, the coating film is formed even when the resin to be dispersed is transparent. It becomes opaque or almost opaque, and the catalyst cannot fully perform its function.

  Even when light is not irradiated, deodorization and sterilization can be performed by physical adsorption. Therefore, a deodorization and sterilization effect can be obtained even when light is not irradiated, such as when the power is not turned on for a long time. The resin is safe without deteriorating.

  Next, the result of the deodorizing experiment of nano titanium oxide using the lamp cover 32 of the present invention will be described. FIG. 5 shows the results of a deodorization experiment of nano-titanium oxide used in the present invention.

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

  The experimental condition is that the lamp cover 32 is placed in a BOX having a capacity of 40 L and is shielded from light from the outside. Further, ammonia was charged as an odor component, brought into contact with nano-titanium oxide and allowed to stand for 24 hours, and then the ammonia concentration in the BOX was measured with a detector tube. FIG. 5 shows three experimental conditions: natural attenuation (reference numeral 34), no light irradiation on the lamp cover 32 (reference numeral 35), and irradiation of the light emitting diode 31 on the lamp cover 32 (reference numeral 36). The ammonia residual rate in BOX is shown.

  From the experimental results shown in FIG. 5, the residual rate of ammonia at natural decay is 33 [%] (reference numeral 34), and the residual ratio of ammonia when light is not irradiated on the lamp cover 32 is 17 [%] (reference numeral 35). When the lamp cover 32 was irradiated with the light emitting diode 31, the residual ratio of ammonia was 3 [%] (reference numeral 36).

  As described above, when the residual rate of ammonia in natural decay (reference numeral 34) is compared with the residual ratio of ammonia when the lamp cover 32 is not irradiated with light (reference numeral 35), there is a difference of 1.9 times in deodorizing ability. It can be said. That is, when the lamp cover 32 is not irradiated with light (reference numeral 35), the ammonia remaining rate is lower than in the case of natural attenuation (reference numeral 34). From this, it is understood that the deodorizing effect is exhibited even in a state where no light is applied. From this, it can be said that the deodorizing effect is exhibited even when the door is not opened and closed for a long time.

  Further, comparing the case of natural decay (reference numeral 34) and the case of irradiating the light emitting diode 31 to the lamp cover 32 (reference numeral 36), it can be said that there is a difference in 11-fold deodorizing ability depending on the presence or absence of catalyst and light. This is because it adsorbs to the deodorizing film and further decomposes by a photocatalytic reaction. That is, it can be said that the deodorization was performed by irradiating light and promoting the oxidation-reduction reaction of the photocatalyst.

  Next, it was decided whether or not the harmful substance was decomposed into water and carbon dioxide by the photocatalytic reaction. FIG. 6 shows the results of a nanocatalyst photocatalytic reaction confirmation test using the lamp cover 32 of the present invention.

Acetaldehyde (CH ₃ CHO) was used as a test gas. When acetaldehyde is decomposed by a photocatalytic reaction, carbon dioxide is generated as a decomposition product by an oxidation-reduction reaction. Therefore, it is confirmed whether a photocatalytic reaction is performed by measuring a decrease in acetaldehyde concentration and an increase in carbon dioxide concentration due to decomposition.

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

  The experimental condition is that the lamp cover 32 and the light emitting diode 31 are placed in a 5 L Tedlar back having a high gas barrier property, the light emitting diode 31 is positioned on the upper surface of the lamp cover 32, and light is irradiated. “Tedlar” is a registered trademark of DuPont.

  The 5L Tedlar bag is shielded from light from the outside, filled with acetaldehyde as an odor component, and brought into contact with nano-titanium oxide to detect the carbon dioxide concentration and acetaldehyde concentration in the 5L Tedlar bag over time. Measured with a tube. FIG. 6 shows the residual rate 37 of carbon dioxide and the residual rate 38 of acetaldehyde measured over time.

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

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

  Next, studies were made to improve the light irradiation efficiency. Even when light is irradiated using the light emitting diode 31, the light irradiated to the lamp cover 32 is slightly uneven depending on the location. Thereby, photocatalytic reaction may not fully be performed.

  Therefore, by providing a light reflecting means (not shown), it is considered that a portion that is not irradiated with light by the lamp cover 32 is also irradiated by light reflection. That is, the effect of the photocatalytic reaction by improving the light irradiation efficiency was confirmed. Here, the light reflecting means is preferably a mirror surface material, and examples thereof include a mirror, a metal plate, and a sheet such as a mirror mat.

  Below, the deodorization test result of nano titanium oxide when the light reflecting means is used on the upper surface of the lamp cover 32 of the present embodiment is shown. In this embodiment, an aluminum plate processed into a wave shape is used as the light reflecting means, and is used outside and inside the lamp cover 32. FIG. 7 shows a test result for confirming the deodorizing performance of ammonia when the light of the light emitting diode 31 is reflected using the nano-titanium oxide used in this example. As a sample, a lamp cover 32 molded with a transparent polystyrene resin was coated with titanium oxide particles having an average particle diameter of 1 to 100 nanometers.

  The experimental condition was that the lamp cover 32 was placed in a BOX having a capacity of 40 L, and light reflecting means was used on the upper and lower surfaces of the lamp cover 32. By using the light reflecting means, the light from the light emitting diode 31 can be diffusely reflected to efficiently irradiate the lamp cover 32 with light, and an improvement in deodorizing ability is expected.

  The BOX with a capacity of 40 L is shielded from light from the outside, filled with ammonia as an odor component, brought into contact with nano-titanium oxide, and allowed to stand for 24 hours, and then the ammonia concentration in the BOX is detected. Measured with a tube.

  FIG. 7 shows the remaining rate of ammonia (symbol 39) in natural decay, the remaining rate 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 light emitting diode in the lamp cover 32. 31 shows the ammonia residual ratio in the BOX under three conditions of the residual ratio of ammonia (reference numeral 41) when 31 is used and a reflector is used.

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

  As described above, when the light emitting diode 31 is irradiated onto the lamp cover 32 coated with nano-titanium oxide, the light reflecting means is used to irradiate light such as an end portion of the lamp cover 32 where light is difficult to reach. As a result, the photocatalytic reaction works efficiently and the deodorizing ability can be improved.

  The above embodiment has the following effects. In other words, by applying photocatalytic processing to resin parts and irradiating light, it is possible to sterilize and deodorize the cold air in the refrigerator compartment, and the state can be easily visually confirmed, so that the user feels clean. Can be given.

  In addition, by using a surface emitting type light emitting diode, it is possible to reduce the amount of the light emitting diode used compared to the conventional one, so that the thermal effect can be suppressed, the cost can be reduced, and the photocatalytic reaction can be performed efficiently. .

  Further, since the transparent resin component is coated with titanium oxide particles having an average particle diameter of 1 to 100 nanometers, a deodorizing function can be added without impairing the transparency, and the deodorizing ability is maintained by the photocatalytic reaction.

DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Refrigerating room 2a, 2b, 2c, 2d Shelf 30 Cold air passage 31 Light emitting diode 32 Lamp cover 33 Door pocket

Claims (5)

A storage room provided in the refrigerator body;
A door for opening and closing the storage room;
A door pocket provided in the door;
Cold air passages provided on the left and right of the back of the storage room ;
A discharge port for sending cold air passing through the cold air passage to the storage chamber ;
A visible light emitting diode which is provided forward from the center in the depth direction of the upper part of the storage chamber and irradiates toward the back; and
A translucent cover covering the diode and having a photocatalyst;
A shelf that partitions the storage chamber and has a photocatalyst,
The cover has an opening at a position facing the flow direction of the cold air discharged from the discharge port,
The diode is irradiated with the cover and the shelf, said portion from a discharge port of cool air discharged into the storage chamber, after being deodorized by passing through the inside cover, will flow towards the door pocket , another part of the cool air refrigerator characterized by flow isosamples along the shelf. A storage room provided in the refrigerator body;
A door for opening and closing the storage room;
A door pocket provided in the door;
Cold air passages provided on the left and right of the back of the storage room;
A discharge port for sending cold air passing through the cold air passage to the storage chamber;
A visible light emitting diode that does not contain ultraviolet light and is provided at the top of the storage chamber;
A transparent cover covering the diode;
A shelf that divides the storage chamber,
A photocatalyst excited by light is provided on at least one of the resin parts of the cover, the shelf, or the wall surface of the storage chamber on which the diode is irradiated ;
The cover has an opening at a position facing the flow direction of the cold air discharged from the discharge port,
The diode irradiates the cover, the shelf or the wall surface of the storage chamber, and a part of the cold air discharged from the discharge port to the storage chamber passes through the cover and is deodorized, and then the door pocket. The other part of the cold air flows along the shelf .   3. The refrigerator according to claim 1, wherein the diode is a surface emitting light emitting diode.   3. The refrigerator according to claim 1, wherein the diode is irradiated when a door that opens and closes the storage chamber is opened.   The refrigerator according to claim 1 or 2, wherein the photocatalyst is coated transparently or translucently with nano-titanium oxide particles having an average particle diameter of 1 to 100 nanometers dispersed therein.

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