JP2005052714A - Deodorization device and refrigerator loaded therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorization device using an ozone lamp and not causing fear such that ozone is discharged to the outside in high concentration if the output of an ultraviolet lamp is raised to become unsafe to a user. <P>SOLUTION: This deodorization device 1 is equipped with the ultraviolet lamp 11, which emits at least ultraviolet rays with a wavelength region of 200 nm or below and is obtained by forming a film, which absorbs a part of ultraviolet rays with the wavelength region of 200 nm or below, on the surface of a glass pipe, and a catalyst filter 12 having a metal or a metal oxide and characterized in that a material of the film comprises at least one of ZrO<SB>2</SB>, CeO<SB>2</SB>and MgO. By this constitution, a part of ultraviolet rays with a short wavelength of 200 nm or below are absorbed by the surface of the glass pipe and ultraviolet rays with a wavelength of 200 nm or above are emitted to the outside without being absorbed to prevent ozone from being discharged in high concentration to become unsafe. Therefore, the deodorization device using ozone and ultraviolet rays and effectively performing deodorization and the removal of bacteria can be provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a deodorizing apparatus corresponding to household appliances such as business facilities or refrigerators.

  In recent years, deodorization equipment using various methods has been developed for the purpose of deodorizing air quality environments such as air purifiers, sterilization and deodorization of odors generated from foods stored in the refrigerator like refrigerators. There is a lot of development. For example, there is a technique for deodorizing and sterilizing by generating ozone by an ozone generating means and utilizing its strong oxidizing action together with deodorization by adsorption and decomposition action by a catalyst filter.

  In a conventional deodorizing device using ozone generating means, there is an air cleaning device equipped with a cold cathode or hot cathode type ultraviolet lamp (see, for example, Patent Document 1).

  FIG. 4 shows a side sectional view of a conventional deodorizing apparatus described in Patent Document 1. As shown in FIG. As shown in FIG. 4, the deodorizing apparatus 1 includes a casing 4 provided with an intake port 2 and an exhaust port 3, and a straight tube type cold cathode tube type that irradiates ultraviolet rays including a wavelength of 200 nm or less built in the casing 4. UV lamps 5, 6, a photocatalyst member 7 arranged in a rectangular parallelepiped cylinder so as to surround each of the two ultraviolet lamps 5, 6, a photocatalyst member 8 having air permeability, 8 is composed of a blower 9 comprising a cross flow fan provided on the leeward side and an adsorption deodorizing member 10 carrying activated carbon provided on the windward side of the photocatalyst members 7 and 8.

About the deodorizing apparatus comprised as mentioned above, the operation | movement is demonstrated below. By the operation of the blower 9, air containing an odor component flows from the intake port 2. A part of the odor component is adsorbed and removed by the adsorption / deodorization member 9 supporting activated carbon. And the air from which some odors were removed passes the photocatalyst members 7 and 8. At this time, the photocatalyst members 7 and 8 are excited by ultraviolet light emitted from the ultraviolet lamps 5 and 6 to generate O ₂ ⁻ or OH radicals, and these active species oxidize and decompose odor components. Moreover, since the ultraviolet lamps 5 and 6 irradiate ultraviolet light with a wavelength of 200 nm or less, ozone is generated. For this reason, the oxidative decomposition action of ozone is added to the action of the photocatalyst, and the decomposition of the odor component is promoted. Since the generated ozone is decomposed by the reducing action of the photocatalytic members 7 and 8, clean air from which the odor components are decomposed and removed from the exhaust port 3 is exhausted.
JP-A-11-276563

  However, in the configuration of the conventional deodorization apparatus, the glass tube material of the ultraviolet lamps 5 and 6 is formed of quartz glass. Therefore, when the ultraviolet output is increased in order to improve the deodorization performance, the wavelength range of 200 nm or more is obtained. Along with the ultraviolet rays, the intensity of ultraviolet rays of 200 nm or less increases and the amount of ozone generated increases. For this reason, even if a photocatalyst member is provided on the lee of the ultraviolet lamp, increasing the UV intensity to improve the deodorizing performance increases the ozone concentration discharged from the deodorizing device depending on the air volume and temperature conditions, which is a safety risk. There was a drawback that there was a possibility.

  The present invention solves the above-described conventional problems, and in order to improve the deodorization and sterilization performance, even if the output of the ultraviolet lamp is increased, high-concentration ozone is not exhausted to the outside of the deodorization apparatus. An object of the present invention is to provide a deodorizing apparatus that is safe for the user and can effectively perform deodorization and sterilization using ozone and ultraviolet rays.

  Another object of the present invention is to effectively regenerate the catalyst filter and maintain the deodorizing speed performance for a long period of time.

  Furthermore, another object of the present invention is to ensure deodorization performance for a long period of time without lowering the ultraviolet intensity even during long-term use.

  Furthermore, another object of the present invention is to deodorize odors generated from stored foods, and to effectively remove stray bacteria, bacteria attached to the inner wall surface, cooling air passages, and odors, and feel an ozone odor. The purpose is to provide a refrigerator without any.

In order to solve the above-mentioned conventional problems, the deodorizing apparatus of the present invention irradiates at least ultraviolet light having a wavelength range of 200 nm or less and a film that absorbs part of the ultraviolet light having a wavelength range of 200 nm or less on the surface of the glass tube. An ultraviolet lamp formed and a catalyst filter having a metal or a metal oxide are provided, and the material of the film is made of at least one of ZrO ₂ , CeO ₂ , and MgO.

As a result, since inorganic metal oxides such as ZrO ₂ , CeO ₂ , and MgO are formed on the lamp surface of the ultraviolet lamp, a part of the ultraviolet rays having a short wavelength of 200 nm or less are generated in the lamp tube. It is absorbed on the surface, and ultraviolet rays of 200 nm or more are irradiated outside the lamp tube without being absorbed. Accordingly, even if the output of the ultraviolet lamp is increased, ozone due to ultraviolet rays having a short wavelength of 200 nm or less is not released at a high concentration outside the lamp tube, and the ultraviolet intensity of 200 nm or more is increased.

In addition, the deodorizing apparatus of the present invention irradiates at least ultraviolet light having a wavelength range of 200 nm or less, and an ultraviolet lamp in which a film that absorbs part of ultraviolet light having a wavelength range of 200 nm or less is formed on the glass tube surface, a metal or And a catalyst filter having a metal oxide, wherein the material of the film is made of TiO ₂ .

As a result, a part of the ultraviolet light having a short wavelength of 200 nm or less is absorbed by the surface of the lamp tube, and O ₂ ⁻ or OH radicals are generated in the film portion by the ultraviolet light irradiated in the lamp tube, and the odor component and the floating are generated. Oxidative degradation of bacteria. Therefore, the deodorization and sterilization performance can be further improved.

  In order to improve the deodorizing and sterilizing performance, the deodorizing apparatus of the present invention does not exhaust high-concentration ozone to the outside of the deodorizing apparatus even when the output of the ultraviolet lamp is increased. Thus, deodorization and sterilization using ozone and ultraviolet rays can be effectively performed.

According to a first aspect of the present invention, there is provided an ultraviolet lamp in which a film that absorbs at least a part of ultraviolet rays having a wavelength range of 200 nm or less is formed on the glass tube surface, and a metal or metal oxide. and a catalyst filter having, among the material of the coating is ZrO _2, CeO _2, MgO, by a deodorizing apparatus characterized by comprising at least one, ZrO _2, CeO _2, MgO on the ramp surface Among the ultraviolet rays generated in the lamp tube, part of the ultraviolet rays having a short wavelength of 200 nm or less are absorbed on the surface of the lamp tube, and the ultraviolet rays of 200 nm or more are not absorbed. Irradiated outside the tube.

  As a result, even if the output of the ultraviolet lamp is increased, ozone due to ultraviolet rays having a short wavelength of 200 nm or less is not emitted to the outside of the lamp tube at a high concentration, and the ultraviolet intensity of 200 nm or more is increased. Therefore, high-concentration ozone is not exhausted to the outside, it is safe for the user, and deodorization and sterilization using ozone and ultraviolet rays can be performed effectively.

In addition, ZrO ₂ , CeO ₂ , and MgO can easily form a thin film on quartz glass in the manufacturing process, so that it is possible to control the absorption rate of short-wavelength ultraviolet light of 200 nm or shorter and the transmittance of long-wavelength ultraviolet light of 200 nm or longer. It becomes. Therefore, it is possible to efficiently produce a deodorizing apparatus according to the application with respect to ozone concentration and ultraviolet intensity.

According to a second aspect of the present invention, there is provided an ultraviolet lamp in which a film that absorbs at least part of ultraviolet light having a wavelength region of 200 nm or less and that absorbs part of ultraviolet light having a wavelength region of 200 nm or less is formed on the glass tube surface, and a metal or metal oxide And a part of the ultraviolet light having a short wavelength of 200 nm or less is absorbed by the surface of the lamp tube, and the deodorizing apparatus is characterized in that the material of the film is made of TiO ₂ . O ₂ ⁻ or OH radicals are generated in the film portion by ultraviolet rays irradiated in the lamp tube, and odor components and airborne bacteria are oxidatively decomposed. Therefore, the deodorization and sterilization performance can be further improved.

  In particular, the third aspect of the present invention suppresses a decrease in UV intensity of a long wavelength of 200 nm or more and a short wavelength of 200 nm or less by setting the film thickness of the first or second invention to 0.05 to 5 μm. Part of the ultraviolet light is absorbed, and the ozone concentration outside the deodorizing apparatus can be controlled to about 0.02 ppm. Therefore, it is safe for the user outside the deodorizing apparatus and the influence of the ozone odor is small, and deodorization and sterilization can be efficiently performed without impairing the effect of the long wavelength ultraviolet rays.

  In the fourth invention, in particular, the ultraviolet lamp of any one of the first to third inventions is an electrodeless type, and since there is no electrode in the lamp tube, the electrode material is applied to the arc tube wall. There is no scattering, there is no reaction between the inclusions in the lamp tube and the electrodes, and the durability of the ultraviolet lamp can be improved. Therefore, the deodorizing performance can be ensured for a long time without lowering the ultraviolet intensity even when used for a long time.

  In the fifth invention, in particular, the catalyst filter according to any one of the first to fourth inventions includes at least one metal oxide of Mn, Cu, Co, or at least one metal of Pd, Pt. It absorbs the odor components of sulfur-based gases such as methyl mercaptan and dimethyl disulfide, and amine-based gases such as trimethylamine, and decomposes ozone generated from ultraviolet lamps. can do. Therefore, the deodorizing speed can be ensured with respect to a general odor, and the ozone concentration outside the deodorizing apparatus can be maintained at a low concentration.

  In the sixth invention, in particular, the catalyst filter according to any one of the first to fifth inventions is installed in the lee of an ultraviolet lamp, and ozone generated by ultraviolet rays of 200 nm or less irradiated from the ultraviolet lamp is generated. It is possible to regenerate the catalyst filter by decomposing the odor component adsorbed without being decomposed by the catalyst filter. Therefore, since the adsorption capacity of the catalyst filter can be maintained, the deodorization speed can be maintained for a long time.

  In the seventh aspect of the invention, in particular, the distance between the catalyst filter of the sixth aspect of the invention and the ultraviolet lamp is within 20 mm, and the odor adsorbed because the ozone generated from the ultraviolet lamp reaches the catalytic filter before being decomposed. Can be decomposed more effectively. Therefore, the catalyst filter can be efficiently regenerated even when the ultraviolet lamp is energized for a short time.

In an eighth aspect of the invention, in particular, in any one of the first to seventh aspects, a photocatalytic member is formed on the windward or leeward side of the ultraviolet lamp or the inner surface of the deodorizing apparatus, and the ultraviolet lamp is irradiated with the photocatalyst member. The photocatalyst member is excited by ultraviolet rays to generate O ₂ ⁻ or OH radicals, and further oxidatively decompose odor components and airborne bacteria. Therefore, the deodorization and sterilization performance can be further improved.

  The ninth invention is particularly characterized by a refrigerator equipped with the deodorizing apparatus according to any one of the first to eighth inventions, and sulfur-based gas and amine-based gas generated from food stored in the refrigerator. The odor components of the water are deodorized by adsorption with a catalytic filter, oxidative decomposition with ozone or photocatalyst, and the low concentration of ozone diffuses to the cooling air channel of the refrigerator and the wall surface of each room, so that the adsorbed odor components and bacteria can be decomposed. it can. At this time, the ozone concentration is about 0.02 ppm, so that the user is not uncomfortable. Therefore, it is safe for the user, and cleanliness is achieved by effectively deodorizing and sterilizing odors and airborne bacteria generated from food stored in the refrigerator using ozone and ultraviolet rays, and odors and bacteria adsorbed on the wall. High refrigerator can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a sectional view of a deodorizing apparatus according to the first embodiment of the present invention, and FIG. 2 is a sectional view of an ultraviolet lamp installed in the deodorizing apparatus according to the first embodiment of the present invention. It is.

In FIG. 1, an ultraviolet lamp 11 is installed in the deodorizing apparatus 1. As shown in FIG. 2, the glass tube 13 of the ultraviolet lamp 11 is made of high-purity quartz glass, and a low-pressure mercury vapor and an inert gas such as argon or xenon are enclosed in the glass tube 13. On the surface of the glass tube 13, a film 14 made of ZrO ₂ and having a thickness of 0.1 μm is formed. A high frequency high voltage is applied to both ends outside the ultraviolet lamp 11 through an inverter circuit (not shown). A catalytic filter 12 for removing odors is installed on the lee of the ultraviolet lamp 11, and a honeycomb-shaped ceramic base material is made of a physical adsorbent such as activated carbon or zeolite and a composite inorganic oxide of MnO ₂ and CuO. The catalyst material of the chemical adsorbent consisting of is supported.

Here, the distance between the catalyst filter 12 and the ultraviolet lamp 11 is set to 20 mm. A photocatalyst member 7 is provided on the inner surface of the deodorizing apparatus 1 facing the ultraviolet lamp 11. The photocatalyst member 7 uses a sheet-like silica fiber as a base material, and TiO ₂ is formed on the surface thereof.

  About the deodorizing apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when a high voltage of several tens kHz and several hundreds V to several kV is applied to both ends of the ultraviolet lamp 11 through the inverter circuit, electrons are discharged from the electrodes in the glass tube 13 and collide with mercury vapor, thereby causing ultraviolet rays. Will occur. Since the glass tube 13 is made of high-purity quartz glass, the generated ultraviolet light transmits ultraviolet light having a short wavelength of 175 nm for generating ozone together with ultraviolet light having a long wavelength region of 254 nm or 365 nm. Then, the ultraviolet rays transmitted through the glass tube 13 reach the coating 14.

At this time, since the coating 14 is a thin film having a film thickness of 0.1 μm made of ZrO ₂ , a part of the short wavelength ultraviolet light of 175 nm is absorbed and the long wavelengths of 254 nm and 365 nm ultraviolet light are almost transmitted. Therefore, unlike the ultraviolet lamp of the conventional configuration, the ozone concentration can be secured as low as about 5 ppm in the vicinity of the ultraviolet lamp 11 (distance of 20 mm from the lamp), and the ultraviolet rays at 254 nm and 365 nm can be reduced to 1 mW / Ultraviolet intensity of cm ² or more can be ensured.

As a result, the photocatalyst member 7 provided on the inner surface of the deodorizing apparatus 1 is highly active because it receives very strong ultraviolet energy, and generates O ₂ ⁻ or OH radicals to efficiently remove odor components flowing into the deodorizing apparatus 1. In particular, it can be oxidatively decomposed by photocatalysis.

  Further, odorous components that are difficult to be decomposed by the photocatalyst member 7 can also be decomposed by ozone near the ultraviolet lamp 11. Furthermore, in the vicinity of the ultraviolet lamp 11, 254 nm ultraviolet rays having high ultraviolet energy and penetrability are irradiated, so that the floating bacteria in the deodorizing apparatus 1 can be effectively decomposed.

Then, the air and ozone containing odor components that have passed through the photocatalyst member 7 reach the catalyst filter 12. The catalyst filter 12 carries a physical adsorbent such as activated carbon and zeolite and a catalyst material of a chemical adsorbent composed of a composite inorganic oxide of MnO ₂ and CuO on a honeycomb-shaped ceramic base material. Is quickly and physically adsorbed and chemically adsorbed and decomposed. Further, since ozone in the air is also decomposed on the catalyst filter 12, it can be further reduced in concentration when discharged outside the deodorizing apparatus 1. For example, when the deodorizing apparatus 1 is installed in a device of about 250 L, the average ozone concentration in the device is about 0.02 ppm, and a sufficiently safe concentration for the user can be realized.

  Further, since the catalyst filter 12 is installed in the vicinity of 20 mm with respect to the ultraviolet lamp 11, ozone is hardly decomposed when ozone reaches the catalyst filter 12, and cannot be completely decomposed on the catalyst filter 12. The odor adsorbed on the catalyst can also be decomposed by ozone to regenerate the catalyst filter 12.

  As described above, in the present embodiment, an ultraviolet lamp having a film that irradiates at least 200 nm or less of ultraviolet rays and absorbs part of ultraviolet rays having a wavelength range of 200 nm or less and a metal or metal oxide are formed. By forming the deodorizing apparatus having the catalyst filter, an inorganic metal oxide is formed on the surface of the glass tube. Therefore, among the ultraviolet rays generated in the lamp tube, a part of the ultraviolet ray having a short wavelength of 200 nm or less is a lamp tube. It is absorbed on the surface, and ultraviolet rays of 200 nm or more are irradiated outside the lamp tube without being absorbed. As a result, even if the output of the ultraviolet lamp is increased, ozone due to ultraviolet rays having a short wavelength of 200 nm or less is not emitted out of the lamp at a high concentration, and the ultraviolet intensity of 200 nm or more is increased. Therefore, high-concentration ozone is not exhausted to the outside, and it is safe for the user. Deodorization and sterilization using ozone and ultraviolet rays can be effectively performed for a long period of time.

In addition, the material of the coating film 14 of the present embodiment can form a similar thin film even if it is CeO ₂ or MgO, and emits short-wavelength ultraviolet rays of 200 nm or less without lowering the ultraviolet intensity of long wavelengths of 200 nm or more. The same effect can be obtained.

Further, when the material of the coating 14 is TiO ₂ , O ₂ ⁻ or OH radicals are generated on the surface of the coating 14, and oxidative decomposition of the odor proceeds by these, so that the deodorizing performance can be further improved.

  In the present embodiment, the case where the film thickness of the coating film 14 is 0.1 μm has been described. However, the present invention is not limited to this. The same safety and deodorizing performance can be realized by arbitrarily setting the thickness in the range of 0.05 to 0.5 μm.

  In the present embodiment, the ultraviolet lamp 11 has been described as a cold cathode tube type having an electrode inside the glass tube 13, but by using an electrodeless type having no electrode inside the glass tube 13, light emission of the electrode material can be achieved. Since there is no scattering on the tube wall and there is no reaction between the inclusions in the glass tube 13 and the electrodes, the deodorizing performance can be ensured for a long time without lowering the ultraviolet intensity even in long-term use. The long-term reliability of the deodorizing device can be improved.

  In the present embodiment, the blower for sending the odor to the deodorizing device is not particularly described, but the deodorizing device itself may be provided with a blower or the like, or a device equipped with the deodorizing device. Even if it is prepared for, there is no problem.

  In the present embodiment, an ultraviolet lamp having a film that absorbs part of ultraviolet rays having a wavelength range of 200 nm or less has been described. However, the degree of absorption varies depending on the size of the ultraviolet lamp and the like. For example, it suffices to absorb about 10% to 90% of the ultraviolet light with an irradiation wavelength range of 200 nm or less, preferably about 80%.

(Embodiment 2)
FIG. 3 is a cross-sectional view of the refrigerator compartment of the refrigerator according to the second embodiment of the present invention.

  In FIG. 3, a cooling air passage 17 through which cold air flows is provided with the back and top walls of the refrigerator compartment 16 as partitions. An evaporator 18 for cooling the refrigerator compartment 16 is installed in the cooling air passage 17, and a cooling fan 19 is installed downstream of the evaporator 18.

  In the cooling air passage 17, a blow-out port 20 through which the cool air cooled by the evaporator 18 is sent to the refrigerating chamber 16 is installed on the downstream side of the evaporator 18, and a suction port 21 for sucking the cool air in the refrigerating chamber 16 is provided on the upstream side. It has been. And the deodorizing apparatus 1 comprised from the ultraviolet lamp 12, the catalyst filter 13, and the photocatalyst member 7 is installed in the vicinity of the blower outlet 20. FIG.

  About the refrigerator provided with the deodorizing apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the compressor (not shown) of the refrigerator is operated, the cooling fan 18 is activated and the cold air cooled by the evaporator 17 flows into the refrigerator compartment 15 from the outlet 19 through the cooling air passage 16. And the foodstuff preserve | saved in the refrigerator compartment 15 is cooled, the cold air in the refrigerator compartment 15 is suck | inhaled from the suction inlet 20, and it returns to the evaporator 17. FIG. In this way, cold air circulates and stores the indoor foods in a refrigerator.

  From the food stored in the refrigerator, sulfur-based gases such as methyl mercaptan, methyl disulfide, and methyl sulfide, which are odors such as garlic and onions, and amine-based gas such as trimethylamine, which is a rot odor of fish, are generated.

  When cold air containing such odorous components flows into the deodorizing device 1 from the suction port 20 through the cooling air passage 16 in accordance with the operation of the cooling fan 18, methyl mercaptan, methyl disulfide, and trimethylamine are mainly adsorbed on the catalyst filter 12. . The methyl sulfide that is difficult to remove by the catalyst filter 12 is removed by ozone generated from the ultraviolet lamp 11 and oxidative decomposition by the photocatalyst member 7. In addition, airborne bacteria that have flowed into the deodorizing apparatus 1 are also decomposed by the 254 nm ultraviolet light emitted from the ultraviolet lamp 11.

  Since the ozone concentration flowing into the refrigerator compartment 15 from the deodorizer 1 through the outlet 19 is as low as 0.02 ppm, it is safe for the user and does not give unpleasant feeling. Moreover, this low concentration of ozone diffuses to the wall surface of the refrigerator compartment 15 and the inner wall of the cooling air passage 16, so that the odor components and adhering bacteria adsorbed on those parts can be decomposed.

  As mentioned above, in this Embodiment, it is a refrigerator provided with the deodorizing apparatus in the cooling air path or any room | chamber interior of a refrigerator compartment, a vegetable compartment, and a freezer compartment, and sulfur generated from the food stored in a refrigerator Oxidized gas and amine gas odor components are adsorbed by a catalytic filter and deoxidized by oxidative decomposition with ozone or photocatalyst, and low concentration of ozone diffuses to the cooling air channel and the walls of each room. Can be disassembled. At this time, the ozone concentration is about 0.02 ppm, so that the user is not uncomfortable. Therefore, it is safe for the user, and cleanliness is achieved by effectively deodorizing and sterilizing odors and airborne bacteria generated from food stored in the refrigerator using ozone and ultraviolet rays, and odors and bacteria adsorbed on the wall. High refrigerator can be provided.

  Moreover, although this Embodiment demonstrated the case where the deodorizing apparatus 1 was installed in the cooling air path 16, if it installs in the refrigerator compartment 15, deodorizing operation can be controlled without depending on the driving | operation of the cooling fan 18. FIG. Stable deodorization and sterilization performance can be obtained without being affected by the load in the refrigerator and the temperature of the installation environment.

  Further, in the present embodiment, the case where the deodorizing apparatus 1 is installed in the vicinity of the blowout port 19 has been described. However, if the deodorizing device 1 is installed in the vicinity of the suction port, the cold air from the evaporator 17 does not directly hit the ultraviolet lamp 11, so Durability can be improved.

  Moreover, although the case where this deodorizing apparatus 1 was installed in a refrigerator compartment was demonstrated in this Embodiment, even if it installs in a vegetable compartment or a freezer compartment, the same effect is acquired.

  As described above, the deodorizing apparatus according to the present invention and the refrigerator equipped with the deodorizing apparatus exhaust high-concentration ozone outside the deodorizing apparatus even if the output of the ultraviolet lamp is increased in order to improve the deodorizing and sterilizing performance. It is safe for the user and can be effectively deodorized and sterilized using ozone and ultraviolet rays, so commercial refrigerators, air cleaners, air conditioners, garbage disposal machines, etc. It can be applied to other uses.

Sectional drawing of the deodorizing apparatus in Embodiment 1 of this invention Sectional drawing of the ultraviolet lamp installed in the deodorizing apparatus in Embodiment 1 of this invention Sectional drawing of the refrigerator compartment of the refrigerator in Embodiment 2 of this invention Cross-sectional view of a conventional deodorizing device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Deodorizing device 7 Photocatalyst member 11 Ultraviolet lamp 12 Catalytic filter 13 Glass tube 14 Coating 15 Cold room 16 Cooling air path

Claims (9)

An ultraviolet lamp in which a film that absorbs at least part of ultraviolet light having a wavelength region of 200 nm or less and that absorbs part of ultraviolet light having a wavelength region of 200 nm or less is formed on the glass tube surface, and a catalyst filter having a metal or metal oxide The deodorizing apparatus is characterized in that the coating material is made of at least one of ZrO ₂ , CeO ₂ , and MgO. An ultraviolet lamp in which a film that absorbs at least part of ultraviolet light having a wavelength region of 200 nm or less and that absorbs part of ultraviolet light having a wavelength region of 200 nm or less is formed on the glass tube surface, and a catalyst filter having a metal or metal oxide A deodorizing apparatus, wherein the film material is made of TiO ₂ . The deodorizing apparatus according to claim 1 or 2, wherein the film has a thickness of 0.05 to 5 µm. The deodorizing apparatus according to any one of claims 1 to 3, wherein the ultraviolet lamp is an electrodeless type. The catalyst filter has a metal oxide composed of at least one of Mn, Cu and Co or a metal composed of at least one of Pd and Pt. Deodorizing apparatus according to item. The deodorizing apparatus according to any one of claims 1 to 5, wherein the catalyst filter is installed in the lee of the ultraviolet lamp. The deodorizing apparatus according to claim 6, wherein a distance between the catalyst filter and the ultraviolet lamp is set to 20 mm or less. The deodorizing apparatus according to any one of claims 1 to 7, wherein a photocatalyst member is formed on the windward or leeward side of the ultraviolet lamp or on the inner surface of the deodorizing apparatus facing the ultraviolet lamp. A refrigerator equipped with the deodorizing apparatus according to any one of claims 1 to 8.

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