JP4375112B2 - Deodorizing device and refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with a deodorizing device including an ultraviolet lamp and a photocatalyst.

  Conventionally, a deodorizing apparatus using this type of ultraviolet lamp irradiates the duct with ultraviolet rays using an ultraviolet lamp, and a reflective agent for preventing deformation of the resin is attached to the ultraviolet irradiation area in the duct ( For example, see Patent Document 1).

  FIG. 5 shows a refrigerator compartment portion of a refrigerator equipped with the conventional deodorizing apparatus described in Patent Document 1. As shown in FIG. 5, the inner box 3 of the refrigerator, the back plate 6 that forms the cool air duct, the cool air duct 13 formed between the inner box 3 and the back plate 6, and the cool air duct 13 are disposed. This is an ultraviolet discharge lamp 14 for irradiating with ultraviolet light, and here has a planar shape. And here, ultraviolet rays are irradiated to the inside of the duct, and visible light is irradiated to the refrigerator compartment side.

In addition, a reflective agent such as aluminum for preventing deformation of the resin is attached to the ultraviolet irradiation range in the duct.
JP 2002-333264 A

  However, in the above-described conventional configuration, in order to prevent deformation of the resin due to ultraviolet rays emitted from the flat ultraviolet lamp into the cold air duct, it is necessary to apply a reflective agent such as aluminum in the cold air duct over a wide range. Had problems.

  The present invention solves the above-described conventional problems, and provides a refrigerator provided with a deodorizing device that is provided with a cylindrical light-shielding body so as to cover an ultraviolet lamp and can prevent deformation of resin in a cold air duct. The purpose is to do.

  Furthermore, the above-described conventional configuration has a problem that the contact rate between the ultraviolet light emitted from the flat-type ultraviolet lamp and the cold air is low, and the deodorization and sterilization performance is limited.

  The present invention solves the above-mentioned conventional problems, and has a high performance by increasing the contact rate between ultraviolet rays and cold air by meandering an air passage formed between a cylindrical light shield and an ultraviolet lamp. It aims at providing the refrigerator provided with the apparatus.

  Further, the conventional configuration has a problem that the deodorizing performance is limited because the periodic components in the cold air are decomposed by the effect of only the ultraviolet rays emitted from the flat ultraviolet lamp.

  This invention solves the said conventional subject, and it aims at providing the refrigerator provided with the deodorizing apparatus which has high performance by comprising a cylindrical light-shielding body with a sheet-like photocatalyst.

  In order to solve the above-described conventional problems, a deodorizing apparatus of the present invention includes an ultraviolet lamp, a cylindrical light shielding body that surrounds the ultraviolet lamp, and an air passage formed between the ultraviolet lamp and the light shielding body. And an opening formed in the body portion of the light shielding body for inflow and outflow of air, and a light shielding member is formed in the ultraviolet lamp direction of the opening.

  As a result, the amount of ultraviolet light that passes through the opening from the ultraviolet lamp and leaks to the outside of the light shield is greatly reduced.

  In the deodorizing apparatus of the present invention, by using a light shielding body, it is not necessary to apply a reflecting material such as aluminum over a wide range in the cold air duct, and the cost can be reduced.

The invention according to claim 1 is a cooler for cooling air in a storage room provided in a refrigerator body, an ultraviolet lamp, a cylindrical light shielding body surrounding the ultraviolet lamp, the ultraviolet lamp, and the light shielding body. and air passage formed between, and a said opening formed in the body portion of the shielding body for air inflow and outflow, the ultraviolet lamp direction shielding member of the opening is formed The ultraviolet lamp is disposed horizontally and an opening of an air outlet is formed above the ultraviolet lamp in the opening, and the cooler is disposed above the opening of the air outlet. By being positioned, the amount of ultraviolet light that leaks from the ultraviolet lamp through the opening and leaks to the outside of the light shield is greatly reduced, and it is not necessary to apply a reflective material such as aluminum over a wide range in the cold air duct, thereby reducing the cost. This Can. Moreover, the ozone concentration of the air flowing out from the opening to the cooler can be reduced.

  According to a second aspect of the present invention, in the first aspect of the present invention, the light shielding member is configured so as to block the ultraviolet light that travels straight from the ultraviolet lamp with respect to the opening. The amount of ultraviolet light that passes through the light and leaks to the outside of the light shield becomes substantially zero, and it is not necessary to attach a reflective material such as aluminum in the cold air duct, thereby reducing the cost.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the openings formed in the body portion of the light shield for air inflow and outflow are arranged diagonally with the ultraviolet lamp as the center. As a result, the cold air that has flowed into the light shield from the opening for inflowing air snakes around the ultraviolet lamp and flows out of the light shield from the opening for air in / out. The rate increases and high deodorizing performance is obtained.

  According to a fourth aspect of the present invention, in the first to third aspects of the invention, the opening formed in the body portion of the light shielding body for air inflow and outflow is symmetric with respect to the longitudinal center of the light shielding body. In the vicinity of the opening, a flow of cool air in the direction of the radiation of the ultraviolet lamp and a flow of cool air in the vicinity of the center of the ultraviolet lamp are formed in the vicinity of the opening. The contact rate between ozone and cold is increased and high deodorizing performance is obtained.

  In the invention of claim 5, in the invention of claim 4, the ultraviolet lamp forms a film that absorbs ultraviolet rays of at least 200 nm or less on the surface of the lamp tube near the opening for air outflow, Since ozone decomposition is promoted by ultraviolet rays having a wavelength of 254 nm in the vicinity of the film forming portion, the ozone concentration at the opening for air outflow can be reduced.

  In the invention according to claim 6, in the light shielding body according to claims 1 to 5, the sheet-like photocatalyst is in a radical state by the ultraviolet ray irradiated from the ultraviolet lamp by arranging the sheet-like photocatalyst in a cylindrical shape. Therefore, a high deodorizing performance can be obtained by the photocatalyst in a radical state.

  According to a seventh aspect of the present invention, in the first to sixth aspects of the invention, the deodorizing device is provided in any one of the refrigeration room, the vegetable room, the switching room, the freezing room, or in the air passage, thereby each storage room. On the other hand, since the action of ultraviolet rays and a photocatalyst can be used, high deodorizing performance can be obtained.

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

(Embodiment 1)
1 is a front view of a refrigerator compartment of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is an AA cross-sectional view of the refrigerator in the first embodiment of the present invention. FIG. 3 is a configuration diagram of the deodorizing apparatus according to Embodiment 1 of the present invention. FIG. 4 is a BB cross-sectional view of the deodorizing apparatus according to Embodiment 1 of the present invention.

  1, 2, 3, and 4, the refrigerator compartment 102 located at the top of the refrigerator main body 1 includes a heat insulating wall 103 and a back cover 104 formed on the back surface. It is divided into the section 106 of.

  The air passage 110 is a suction air passage formed in the back cover 104, and is connected to the plurality of compartments 106 by a plurality of suction ports 111, and from the plurality of compartments 106 at the lower portion 112 of the cooling chamber 120. It is configured so that cold air gathers.

  The cooling chamber 120 includes a cooler 121 that is a cross fin coil, and a heat insulating member 122 is disposed between the front surface of the cooler 121 and the back cover 104. The cooler 121 cools the air from the refrigerating chamber 102 in which the refrigerant flows inside the pipe and the air flows outside the pipe and flows in from the lower part.

  The refrigerating room fan 130 that is an axial flow type is disposed above the cooling chamber 120, and is attached so as to suck air from the cooling chamber 120 and blow it to the air passage 140.

  The air passage 140 is an air passage for blowing cold air to the refrigerator compartment 102 through the plurality of outlets 141.

  The deodorizing device 150 is installed in the lower portion 112 of the cooling chamber 120 and mainly includes an ultraviolet lamp 160, a light shielding body 170, and an air passage 151 formed between the ultraviolet lamp 160 and the light shielding body 170. .

The ultraviolet lamp 160 is disposed substantially horizontally with respect to the refrigerator body 1. The ultraviolet lamp 160 has a light emitting part 161, electrodes 162a and 162b and ceramic holders 163a and 163b arranged at both ends of the light emitting part 161, and is fixed to the heat insulating member 122 by a mounting member 152 that supports the ceramic holders 163a and 163b from both ends. Has been. The mounting member 152 is preferably a resin material having high electrical insulation, and ABS is used in this embodiment. The light emitting unit 161 uses a lamp tube made of quartz glass with high purity, and a low-pressure mercury vapor and an inert gas such as argon or xenon are enclosed in the lamp tube. The electrodes 162a and 162b are located at both ends outside the lamp tube, and a high frequency high voltage is applied through an inverter circuit (not shown). Here, when the ultraviolet lamp 160 is turned on, since the lamp tube of the ultraviolet lamp 160 is made of high-purity quartz glass, the low-wavelength ultraviolet rays generated by the discharge under mercury vapor in the lamp tube are not shielded. There is an action of transmitting through the tube wall, ultraviolet light having a wavelength of 185 nm and ultraviolet light having a wavelength of 254 nm are irradiated to the outside of the lamp tube, and oxygen in the air reacts with energy of the ultraviolet light having a wavelength of 185 nm to generate ozone. Further, radical oxygen is generated from ozone by energy of ultraviolet light having a wavelength of 254 nm. Further, a film 164 having a film thickness of 0.05 to 0.5 μm made of an inorganic metal oxide such as ZrO ₂ is formed on the surface of the lamp tube of the light emitting portion 161 on the electrode 162b side and the surface of the electrode 162b.

The light shielding body 170 forms a cylindrical shape that surrounds the ultraviolet lamp 160, and includes a body portion 171 and flange portions 172 that close both ends. Here, the length L in the body direction of the light shielding body 170 is arranged to be longer than the distance length l between the electrodes 162a and 162b of the ultraviolet lamp 160. As the material of the light shielding member 170, the surface of the sheet-like silica principal component substrate, it forms a TiO _2, a surface forming the TiO ₂ is facing the UV lamp 160.

  An opening 180 serving as an air inflow port is formed in the vicinity of the electrode 162 a of the body portion 171.

  A light shielding member 172 and a light shielding member 173 are formed on the ultraviolet lamp 160 side of the opening 180, that is, in the inner direction of the cylindrical light shielding body 170. Here, the light shielding member 172 is formed substantially horizontally with respect to the opening 180, and the light shielding member 173 is formed substantially perpendicular to the opening 180 at both ends of the light shielding member 172. In addition, the light shielding members 172 and 173 block ultraviolet rays that travel straight from the ultraviolet lamp 160 with respect to the opening 180.

  The opening 190 that is an air outlet is formed in the vicinity of the electrode 162b of the body 171 and is formed diagonally with the opening 180 around the ultraviolet lamp, and the opening 190 and the opening 180 are The light shields 170 are arranged symmetrically with respect to the central portion in the longitudinal direction.

  A light shielding member 174 and a light shielding member 175 are formed on the ultraviolet lamp 160 side of the opening 190, that is, in the inner direction of the cylindrical light shielding body 170. Here, the light shielding member 174 is formed substantially horizontally with respect to the opening 190, and the light shielding member 175 is formed substantially perpendicular to the opening 190 at both ends of the light shielding member 174. In addition, the light shielding members 172 and 173 block ultraviolet rays that travel straight from the ultraviolet lamp 160 with respect to the opening 190.

  At this time, the opening 180 that is an air inflow port is formed on the leeward side, in the present embodiment, on the lower side (on the anti-cooler side), and the opening 190 that is an air outflow port is on the leeward side, this embodiment. In the example, it is formed on the upper side (cooler side).

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

  First, in the case of a deodorizing operation while the refrigerator compartment fan 130 is operating, in an actual refrigerator, the cooling operation or the initial stage of the defrosting operation corresponds to this, and the air in the refrigerator compartment 102 flows into the air passage 110 from the plurality of suction ports 111. And gather at the lower part 112 of the cooling chamber 120. The collected air is cooled when passing through the cooler 121, blown into the air passage 140 by the cold room fan 130, and blown into the cold room 102 from the plurality of outlets 141.

  Here, in the deodorizing device 150 disposed in the lower portion 112 of the cooling chamber 120, the air flowing in from the opening 180 is a short wavelength ultraviolet ray emitted from the ultraviolet lamp 160 and the short wavelength ultraviolet ray. It is deodorized and sterilized by the effect of ozone generated at a wavelength of 185 nm, and flows out from the opening 190 into the cooling chamber. Furthermore, a deodorizing and disinfecting effect can also be obtained when the photocatalyst formed on the inner surface of the projectile body is brought into a radical state by this short wavelength ultraviolet ray.

  At this time, the short wavelength ultraviolet light emitted from the ultraviolet lamp is exposed to a material exposed on the surface of the lower portion 112 of the cooling chamber 120 where the deodorizing device 150 is installed, particularly a resin material such as ABS widely used in refrigerators. Adversely affected.

  Therefore, the light shielding members 172 and 173 are shaped so as to protrude toward the inside of the light shielding body 170 and are configured to cover the ultraviolet lamp 160 with respect to the opening 180.

  Further, the light shielding members 174 and 175 are shaped so as to protrude toward the inside of the light shielding body 170 and are configured to cover the ultraviolet lamp 160 with respect to the opening 190.

  Therefore, short-wave ultraviolet rays are not directly irradiated from the light emitting portion 161 of the ultraviolet lamp 160 through the opening 180 and the opening 190 into the cooling chamber.

  Further, since the opening 180 for inflow of air and the opening 190 for outflow of air are arranged diagonally with respect to the ultraviolet lamp, a meandering air passage is formed in the light shielding body 170, and the opening The air sucked from the portion 180 has a very high contact rate with ozone generated by the ultraviolet lamp 160 and the light-shielding body 170 having a photocatalytic action.

Further, the opening 180 and the opening 190 are arranged symmetrically with respect to the central portion in the longitudinal direction of the light shielding body 170, and in the vicinity of the opening 190, the ultraviolet lamp opening 180 toward the opening 190. Thus, a substantially horizontal air flow is formed with respect to the body direction of the ultraviolet lamp 160. At this time, a film 164 having a thickness of 0.05 to 0.5 μm made of an inorganic metal oxide such as ZrO ₂ is formed on the surface of the lamp tube of the light emitting unit 161 on the opening 190 side and the surface of the electrode 162b. Therefore, a large amount of ozone generated on the opening 180 side is decomposed on the opening 190 side, so that the ozone concentration of the air flowing out from the opening 190 to the cooler 121 can be reduced.

  As described above, the deodorizing apparatus 150 according to the present embodiment includes the substantially cylindrical ultraviolet lamp 160 in which the discharge medium containing rare gas and mercury is sealed, the cylindrical light shielding body 170 surrounding the ultraviolet lamp 160, and the ultraviolet light. An air passage formed between the lamp 160 and the light shielding body 170, and a body portion 171 of the light shielding body for inflow and outflow of air, and openings 180 and 190 formed toward the ultraviolet lamp 160 are configured. Since the light shielding bodies 172 and 174 connected to the opening ends 181 and 191 of the openings 180 and 190 close to the ultraviolet lamp 160 are positioned on the ultraviolet lamp 160 side of the openings 180 and 190, the light passing through the openings 180 and 190. The amount of ultraviolet rays leaking to the outside is greatly reduced, and it is not necessary to apply a reflective material such as aluminum to the lower portion 112 of the cooling chamber 120 over a wide range. It is possible to bet of.

  Further, the opening portion 180 is inclined in the direction away from the ultraviolet lamp 160 with respect to the tangent line connecting the body portion 171 side opening end 182 and the outer tube of the light emitting portion 161, thereby opening the opening portion. Ultraviolet rays do not leak to the outside through 180 and 190, and it is not necessary to attach a reflective material such as aluminum to the lower portion 112 of the cooling chamber 120, so that the cost can be reduced.

  In addition, since the opening 180 for air inflow and the opening 190 for air outflow are arranged diagonally with the ultraviolet lamp 160 as the center, a meandering air passage is formed in the light blocking body 170. As a result, the contact ratio between ultraviolet rays and air increases, and high deodorization and sterilization performance can be obtained.

  Further, the opening 190 and the opening 180 are arranged symmetrically with respect to the central portion in the longitudinal direction of the light shielding body 170, so that in the vicinity of the opening for air inflow and outflow, in the ray releasing direction of the ultraviolet lamp. In the vicinity of the center of the UV lamp and the center of the UV lamp, a cool air flow is formed that is parallel to the axial direction of the UV lamp, increasing the contact ratio between UV light, ozone, and cool air, resulting in high deodorization and sterilization performance. It is done.

Further, a film 164 having a film thickness of 0.05 to 0.5 μm made of an inorganic metal oxide such as ZrO ₂ is formed on the surface of the lamp tube of the light emitting portion 161 on the electrode 162b side and the surface of the electrode 162b. As a result, a large amount of ozone generated on the opening 180 side is decomposed on the opening 190 side, so that the ozone concentration of the air flowing out from the opening 190 to the cooler 121 can be reduced.

  Further, since the inner surface of the light shielding body 170 is made of a photocatalyst, the photocatalyst is brought into a radical state by the short wavelength ultraviolet rays emitted from the ultraviolet lamp 160, so that high deodorization and sterilization performance can be obtained.

  As described above, the deodorizing apparatus according to the present invention is configured so that the ultraviolet lamp is surrounded by the cylindrical photocatalyst member, and ultraviolet rays of the ultraviolet lamp are not directly emitted to the outside from the air inlet and outlet. Since it is not necessary to apply a special reflective material to a part over a wide range, and the cost can be greatly reduced, it can be applied to an air conditioner, an air purifier, and a commercial refrigerator.

The front view of the refrigerator of Embodiment 1 by this invention AA line sectional view of FIG. Sectional drawing of the deodorizing apparatus of the refrigerator of Embodiment 1 by this invention BB sectional view of FIG. Cross section of the main part of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 102 Cold room 150 Deodorizing device 151 Air path 160 Ultraviolet lamp 164 Film | membrane 170 Light-shielding body 171 Body part of a light-shielding body 172, 173, 174, 175 Light-shielding member 180 Opening part for air inflow 190 Opening part for air outflow

Claims (7)

A cooler for cooling air in a storage room provided in the refrigerator main body, an ultraviolet lamp, a cylindrical light shielding body surrounding the ultraviolet lamp, and an air passage formed between the ultraviolet lamp and the light shielding body; An opening formed in the body portion of the light shielding body for inflow and outflow of air, a light shielding member is formed in the ultraviolet lamp direction of the opening, and the ultraviolet lamp is disposed horizontally The refrigerator is characterized in that an opening of an air outlet is formed above the ultraviolet lamp in the opening, and the cooler is located above the opening of the air outlet. deodorizing device of use.   The deodorizing apparatus according to claim 1, wherein a light shielding member is formed so as to block the ultraviolet light traveling straight from the ultraviolet lamp with respect to the opening.   The deodorizing apparatus according to claim 1 or 2, wherein openings formed in a body portion of the light shielding body for air inflow and outflow are arranged diagonally with an ultraviolet lamp as a center.   The deodorization as described in any one of Claim 1 to 3 with which the opening part formed in the trunk | drum of a light-shielding body for air inflow or outflow is arrange | positioned symmetrically with respect to the center of the longitudinal direction of a light-shielding body. apparatus.   The deodorizing apparatus according to claim 4, wherein the ultraviolet lamp has a film that absorbs ultraviolet rays of at least 200 nm or less formed on the surface of the lamp tube in the vicinity of the opening.   The deodorizing apparatus according to any one of claims 1 to 5, wherein the light shielding body has a sheet-like photocatalyst arranged in a cylindrical shape.   A refrigerator comprising the deodorizing device according to any one of claims 1 to 6 in any one of a refrigeration room, a vegetable room, a switching room, and a freezing room or an air passage.

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