JP4607844B2 - refrigerator - Google Patents

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JP4607844B2
JP4607844B2 JP2006277254A JP2006277254A JP4607844B2 JP 4607844 B2 JP4607844 B2 JP 4607844B2 JP 2006277254 A JP2006277254 A JP 2006277254A JP 2006277254 A JP2006277254 A JP 2006277254A JP 4607844 B2 JP4607844 B2 JP 4607844B2
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ozone
air
refrigerator
deodorizing device
blowing
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JP2008096017A (en
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功一 古賀
巧 及川
隆賀 岩井
郁夫 石橋
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Toshiba Corp
Toshiba Lifestyle Products and Services Corp
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Toshiba Corp
Toshiba Consumer Electronics Holdings Corp
Toshiba Home Appliances Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/068Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
    • F25D2317/0681Details thereof

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  • Catalysts (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Description

本発明は、可燃性冷媒を使用した冷蔵庫に係り、特に脱臭装置として高電圧回路を有するオゾン発生器を採用している冷蔵庫の構成に関する。   The present invention relates to a refrigerator using a flammable refrigerant, and more particularly to a configuration of a refrigerator that employs an ozone generator having a high voltage circuit as a deodorizing device.

近年、食文化への関心の高まりとともに冷蔵庫内には多様な食品が貯蔵されることから、庫内の臭いを強力に、且つ、メンテナンスフリーで除去する技術の開発が要望されている。このユーザーニーズに対する具体的な方法のひとつとして、例えば、特許文献1に示されているように、高電圧放電によってオゾンや紫外線を発生させる手段と、光触媒作用で空気中に含まれている臭気成分や有害物質などの分解をおこなう光触媒モジュールと、高電圧放電手段により発生させたオゾンを分解するオゾン分解手段とからなる脱臭装置を備えた冷蔵庫が商品化されている。   In recent years, with the growing interest in food culture, various foods are stored in the refrigerator, and therefore, there is a demand for the development of a technique that removes the odors in the cabinet powerfully and maintenance-free. As one specific method for this user need, for example, as shown in Patent Document 1, means for generating ozone and ultraviolet rays by high voltage discharge, and odor components contained in the air by photocatalysis Refrigerators equipped with a deodorizing device comprising a photocatalyst module for decomposing organic substances and harmful substances and ozone decomposing means for decomposing ozone generated by high-voltage discharge means have been commercialized.

オゾンによる脱臭装置は、オゾン発生手段とオゾン分解手段とから構成されており、オゾン発生手段としては、上記のような高電圧放電式の発生器や紫外線ランプによるものなどがあり、オゾン分解手段の触媒としては、二酸化マンガンなどの金属酸化物や活性炭などが用いられている。   The ozone deodorizing apparatus is composed of ozone generating means and ozone decomposing means. Examples of ozone generating means include the high voltage discharge generator and the ultraviolet lamp as described above. As the catalyst, metal oxides such as manganese dioxide, activated carbon, and the like are used.

前記脱臭装置の構成は、図4に示すように、通常、オゾン分解手段(56)は、光触媒フィルタ(57)や放電電極(58)、対極(59)によって構成された光触媒モジュールからなるオゾン発生手段(55)の風下側に配置されており、送風手段(62)によって送風経路(52)内に流入するとともに、オゾン分解手段(56)の触媒に吸着した貯蔵室内の臭気物質は、オゾン発生手段(55)で発生させたオゾンにより分解、脱臭される。そして、余剰オゾンは、オゾン分解手段(56)により分解されるものであり、余剰のオゾンが貯蔵室内に流入してオゾン臭で不快感を覚えたり、人体に悪影響を与えることを防ぐようにしている。そのため、脱臭装置(53)の性能は風量に大きく依存することになり、風量が大きいほど脱臭性能は向上する。   As shown in FIG. 4, the deodorization apparatus is generally configured to generate ozone by the ozone decomposition means (56) comprising a photocatalytic module comprising a photocatalytic filter (57), a discharge electrode (58), and a counter electrode (59). The odorous substance in the storage chamber, which is arranged on the leeward side of the means (55) and flows into the air passage (52) by the air blowing means (62) and adsorbed to the catalyst of the ozone decomposition means (56), generates ozone. Decomposed and deodorized by ozone generated by means (55). The surplus ozone is decomposed by the ozone decomposing means (56) so as to prevent the surplus ozone from flowing into the storage chamber and feeling uncomfortable with the ozone odor or adversely affecting the human body. Yes. Therefore, the performance of the deodorizing device (53) greatly depends on the air volume, and the larger the air volume, the better the deodorizing performance.

一方、フロンガスによるオゾン層破壊や地球温暖化などに対する環境保護の観点から、冷蔵庫の冷凍サイクルに使用する冷媒は、これまでのHFC(ハイドロフルオロカーボン)から、オゾン層の破壊がなく地球温暖化係数の低いイソブタンなどの炭化水素系冷媒(HC冷媒)へ切り替えられているが、炭化水素系冷媒は可燃性であることから、冷媒漏れを生じてスパークなどで引火した場合には火災に発展する可能性がある。   On the other hand, from the viewpoint of environmental protection against ozone layer destruction and global warming caused by chlorofluorocarbon gas, the refrigerant used in the refrigerator refrigeration cycle has a global warming potential of HFC (hydrofluorocarbon) with no ozone layer destruction. Although it has been switched to hydrocarbon refrigerants (HC refrigerants) such as low isobutane, hydrocarbon refrigerants are flammable, so if a refrigerant leaks and ignites by sparks etc., it may develop into a fire There is.

通常、冷蔵庫では、前記のような可燃性冷媒が漏洩しないような設計がなされているが、最悪の状況を考慮し、冷蔵庫の製造時の不具合や搬送時における衝撃によって、たとえ冷蔵庫使用時に冷媒漏れが発生したとしても冷蔵庫内に拡散するようにし、また、スパークしている電子部品に漏洩した冷媒が侵入しても、火災を発生させないような安全設計が施されている。   Normally, refrigerators are designed not to leak flammable refrigerant as described above. However, in consideration of the worst situation, refrigerant leaks even when the refrigerator is used due to problems during manufacture of the refrigerator or impact during transportation. Even if this occurs, it is allowed to diffuse into the refrigerator, and a safety design is provided so that a fire does not occur even if a leaked refrigerant enters the sparking electronic component.

上記のように可燃性冷媒が漏れ出た場合には、前述した脱臭装置(53)におけるオゾン発生手段(55)も発火源となる可能性があるものであり、これを冷蔵庫に搭載するには、同様に安全設計を施す必要がある。そして、前記オゾン発生手段(55)の安全設計としては、a.周辺部品の材料を燃え難いものに代替する方法。b.温度ヒューズなどの温度検知手段を設け、オゾン発生手段に引火しても、発火による温度上昇を検知することでオゾン発生手段への電力供給を断ち、火が周囲に移る前に脱臭装置内で燃焼を完結させる方法。また、c.オゾン発生手段への送風量(可燃性冷媒の供給量)を抑え、燃焼を抑制するとともに周辺部品への燃え移り(熱の拡散)を防ぐ方法。などがある。
特開2003−339839号公報
If the flammable refrigerant leaks as described above, the ozone generating means (55) in the deodorizing device (53) described above may also become an ignition source. It is necessary to apply safety design as well. And as a safe design of the ozone generating means (55), a. A method to replace peripheral materials with nonflammable materials. b. Even if the ozone generation means is ignited by providing a temperature detection means such as a thermal fuse, the power supply to the ozone generation means is cut off by detecting the temperature rise due to ignition, and it is burned in the deodorizing device before the fire moves to the surroundings How to complete. C. A method that suppresses the amount of air blown to the ozone generating means (the amount of flammable refrigerant supplied), suppresses combustion, and prevents burning (spreading of heat) to surrounding parts. and so on.
JP 2003-339839 A

前述したように、脱臭装置の性能は、風量に大きく依存して風量が大きいほど脱臭性能は向上するものであり、前記bの方法のように、送風量が大きくなれば発火による熱を温度検知手段に伝え易くなり、より迅速に発火による温度上昇を検知できるようになるが、反面、風量が大きいと熱拡散が大きくなり、cの方法に対しては不適切なものになる。   As described above, the performance of the deodorizing device greatly depends on the air volume, and the larger the air volume, the better the deodorizing performance. As in the method b, the temperature of the heat generated by ignition is detected when the air volume increases. It becomes easy to convey to the means, and it becomes possible to detect the temperature rise due to ignition more quickly, but on the other hand, if the air volume is large, the thermal diffusion becomes large and becomes inappropriate for the method c.

それゆえ、脱臭装置には一定風量を送風するとともに、オゾン発生手段には、bとcの方法を考慮した最適風量を送風する設計が必要となり、従来は、図5に示すように、送風経路(72)内に、脱臭装置(73)のオゾン発生手段(75)をバイパスする別の送風経路(85)を設けるようにしていた。しかしながら、この構成では、脱臭性能を向上させるために大量の風を送風しようとする場合、矢印のように、オゾン発生手段(75)に対してもオゾン発生手段(75)とバイパス風路(85)との圧力損失比に対応した風量が分配されるので、cの方法に基づく防爆作用が不確実なものとなっていた。   Therefore, it is necessary to design the deodorizing device to blow a constant amount of air and the ozone generating means to design an optimum amount of air in consideration of the methods b and c. Conventionally, as shown in FIG. In (72), another air blowing path (85) that bypasses the ozone generating means (75) of the deodorizing device (73) was provided. However, in this configuration, when a large amount of wind is to be blown in order to improve the deodorizing performance, the ozone generating means (75) and the bypass air path (85 ) And the air volume corresponding to the pressure loss ratio are distributed, so that the explosion-proof action based on the method c is uncertain.

本発明は上記の事情を考慮してなされたものであり、送風経路内における脱臭装置の脱臭性能と防爆性能の双方の両立を容易にはかることができる冷蔵庫を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigerator that can easily achieve both the deodorizing performance and the explosion-proof performance of the deodorizing device in the air blowing path.

上記課題を解決するために本発明の冷蔵庫は、冷凍サイクルの冷媒として可燃性冷媒を用いた冷蔵庫内に設けられ、高電圧放電によってオゾンを発生させる手段と発生させたオゾンを分解するオゾン分解手段とからなる脱臭装置を送風手段によって送風される送風経路内に配置したものにおいて、前記送風経路内には、前記オゾン発生手段をバイパスするバイパス風路を前記オゾン発生手段に開放して形成するとともにオゾン発生手段への風量を抑制する防風壁を設けて前記オゾン発生手段への風量より前記バイパス風路への風量を多くしたことを特徴とするものである。 In order to solve the above problems, the refrigerator of the present invention is provided in a refrigerator using a flammable refrigerant as a refrigerant of a refrigeration cycle, and generates ozone by high voltage discharge and ozone decomposition means for decomposing generated ozone. The deodorizing device consisting of the above is arranged in a ventilation path that is blown by the blowing means, and in the blowing path, a bypass air passage that bypasses the ozone generating means is opened to the ozone generating means and formed. A windbreak wall that suppresses the air volume to the ozone generating means is provided to increase the air volume to the bypass air passage from the air volume to the ozone generating means .

本発明の構成によれば、脱臭装置への充分な送風量を確保して脱臭性能に優れた効果を得るとともに、オゾン発生手段への送風量を抑制して熱拡散を防ぐことができ、送風経路内における脱臭装置の脱臭性能と防爆性能の双方の両立を容易にはかることができる。   According to the configuration of the present invention, it is possible to secure a sufficient amount of blowing air to the deodorizing device and obtain an effect excellent in deodorizing performance, and to suppress the amount of blowing air to the ozone generating means and prevent thermal diffusion, Both deodorizing performance and explosion-proof performance of the deodorizing device in the route can be easily achieved.

以下、図面に基づき本発明の1実施形態について説明する。図1は本発明に係る冷蔵庫の縦断面図であり、断熱箱体からなる冷蔵庫本体(1)内部の貯蔵空間の最上部には冷蔵室(2)を配置し、その下方には断熱仕切壁を介して、製氷室(3)と図示しない温度切替室を左右に併置している。さらにその下方には、冷蔵室(2)よりやや高温で高湿度に保持された野菜室(4)を設け、最下部には冷凍室(5)をそれぞれ独立して配置している。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a refrigerator according to the present invention, in which a refrigerator compartment (2) is arranged at the top of a storage space inside a refrigerator main body (1) comprising a heat insulating box, and a heat insulating partition wall is provided below the refrigerator compartment (2). The ice making chamber (3) and a temperature switching chamber (not shown) are juxtaposed on the left and right. Furthermore, a vegetable room (4) maintained at a slightly higher temperature and higher humidity than the refrigerator compartment (2) is provided below, and a freezing room (5) is independently arranged at the lowermost part.

各貯蔵室は、その前面開口部に各々専用の開閉扉を設けて閉塞するとともに、冷蔵貯蔵空間および冷凍貯蔵空間のそれぞれの背面に設置した冷蔵用冷却器(6)と冷凍用冷却器(7)および各冷却器の近傍に設けたファン(8)(9)とダクトによって冷気を循環させ、各貯蔵室毎に設定した温度に冷却制御される。   Each storage chamber is closed by providing a dedicated opening / closing door at the front opening thereof, and a refrigeration cooler (6) and a refrigeration cooler (7) installed on the back of each of the refrigeration storage space and the refrigeration storage space. ) And fans (8), (9) and ducts provided in the vicinity of each cooler circulate cool air, and the cooling is controlled to a temperature set for each storage room.

冷蔵庫本体(1)の外部下方に形成した機械室には冷媒圧縮機(10)を設置しており、圧縮機(10)は、前記各冷却器(6)(7)などとともに冷凍サイクルの一環をなし、冷媒としては、イソブタンなどの炭化水素系冷媒(HC冷媒)を封入しており、吐出した高温高圧の冷媒を、断熱箱体を構成する外箱の背面や底面に配設した図示しない凝縮器および絞り装置などを経由して、冷蔵および冷凍用冷却器(6)(7)に導入し、生成された冷気を冷却ファン(8)(9)によって各貯蔵室内に供給し冷却作用をおこなうものであり、冷却器(6)(7)の周囲には、冷却運転の積算などにより発熱させて冷却器の霜取りをおこなう除霜ヒータを配置している。   A refrigerant compressor (10) is installed in the machine room formed below the refrigerator body (1), and the compressor (10) is part of the refrigeration cycle together with the coolers (6) and (7). As a refrigerant, hydrocarbon refrigerant (HC refrigerant) such as isobutane is sealed, and the discharged high-temperature and high-pressure refrigerant is disposed on the back and bottom surfaces of the outer box constituting the heat insulation box (not shown) The refrigerant is introduced into the refrigeration and freezing coolers (6) and (7) via a condenser and a throttle device, etc., and the generated cold air is supplied to the respective storage chambers by the cooling fans (8) and (9) to effect cooling. Around the coolers (6) and (7), a defrost heater is installed around the coolers (6) and (7) to generate heat by integrating the cooling operation to defrost the cooler.

そして、前記冷蔵室(2)の下方に設けた低温ケース(11)の底壁外面における下方の野菜室(4)へ連通する冷気の送風経路(12)内には、脱臭装置(13)を配設している。この脱臭装置(13)は、概略構成を図2に示すように、光触媒モジュール(15)とオゾン分解触媒(16)とを備え、送風経路(12)内を流通する冷気に含まれる臭い分子や有機物質を吸着し脱臭するものである。   And in the ventilation path (12) of the cold air which communicates with the vegetable room (4) below in the bottom wall outer surface of the low temperature case (11) provided below the refrigerator compartment (2), a deodorizing device (13) is installed. It is arranged. As shown in FIG. 2, the deodorization device (13) includes a photocatalyst module (15) and an ozone decomposition catalyst (16), and contains odor molecules contained in the cold air flowing through the air passage (12). It adsorbs and deodorizes organic substances.

光触媒モジュール(15)は、アルミナやシリカ等の多孔質セラミックからなる基体の表面に、酸化チタンに代表される光触媒粒子を固定した光触媒フィルタ(17)を2枚隣接し、この光触媒フィルタ間には、放電部として、ステンレス等の薄板をエッチングして網目状に形成した放電電極(18)を立設するとともに、前記2枚の光触媒フィルタ(17)(17)の風上と風下側には前記放電電極と同様に形成した対極(19)(19)をそれぞれ配置することで構成されている。   The photocatalyst module (15) has two photocatalyst filters (17) on which photocatalyst particles typified by titanium oxide are fixed on the surface of a substrate made of a porous ceramic such as alumina or silica, and between these photocatalyst filters. In addition, the discharge electrode (18) formed in a mesh shape by etching a thin plate of stainless steel or the like as a discharge portion is erected, and on the upwind and leeward sides of the two photocatalytic filters (17) (17) The counter electrodes (19) and (19) formed in the same manner as the discharge electrodes are arranged respectively.

(20)は高圧電源部であり、高電圧発生トランス(21)により前記放電電極(18)と各対極(19)(19)との間に高電圧を印加することにより、電極間に放電を起こす。   (20) is a high-voltage power supply unit, and a high voltage is applied between the discharge electrode (18) and each counter electrode (19) (19) by a high-voltage generating transformer (21) to discharge between the electrodes. Wake up.

上記のように、脱臭装置(13)は、電源回路(20)に通電して放電電極(18)と対極(19)との間に電圧を与えることで電極間に放電が起き、この空間放電機構で発生した紫外線が光触媒フィルタ(17)(17)に照射されることで光触媒を活性化させ、発生した活性酸素の水酸化ラジカル(遊離基)の強い酸化作用で光触媒フィルタ(17)(17)の表面に付着した臭気ガス成分や有機化合物の結合を分解し、無臭化若しくは低臭気化することで脱臭するものである。   As described above, the deodorizing device (13) is energized to the power circuit (20) to apply a voltage between the discharge electrode (18) and the counter electrode (19). The photocatalyst filter (17) (17) is activated by irradiating the photocatalyst filter (17) (17) with the mechanism, and the photocatalyst filter (17) (17) is activated by the strong oxidizing action of hydroxyl radicals (free radicals) of the generated active oxygen. ) Is deodorized by decomposing bonds of odorous gas components and organic compounds adhering to the surface and making them odorless or reducing odor.

そして、菌細胞膜を脆化させ抗菌をおこなうとともに、酸化分解作用によって光触媒フィルタ(17)(17)表面の微生物の繁殖を抑制して、脱臭装置(13)や貯蔵室壁表面の汚れを分解除去する。また、上記光触媒による脱臭装置(13)は、臭気物質の酸化分解による脱臭作用のみでなく、果実等から発生して食品を熟成、すなわち老化させるホルモンであるエチレンを分解する作用を有しており、このエチレン分解作用による食品鮮度の保持効果を得ることができるものである。   In addition to embrittlement of the bacterial cell membrane and antibacterial action, the oxidative decomposition action suppresses the growth of microorganisms on the surface of the photocatalytic filter (17) (17), thereby decomposing and removing dirt on the deodorizing device (13) and storage chamber wall surface. To do. The photocatalyst deodorization apparatus (13) has not only a deodorizing action by oxidative decomposition of odorous substances, but also an action of decomposing ethylene, which is a hormone that is generated from fruits and matures, that is, aged. The effect of maintaining the freshness of food by this ethylene decomposition action can be obtained.

そしてまた、前記放電電極(18)と対極(19)が放電すると、紫外線とともにオゾンが発生するものであり、前記光触媒モジュール(15)は、紫外線による活性酸素の発生で有機物質を分解させる機能と同時に、オゾン発生手段として機能し、臭気成分を含んだ冷気を発生させたオゾンと混合し反応させることで、臭気成分を酸化分解して脱臭するものである。   Further, when the discharge electrode (18) and the counter electrode (19) are discharged, ozone is generated together with ultraviolet rays, and the photocatalyst module (15) has a function of decomposing organic substances by generation of active oxygen by ultraviolet rays. At the same time, it functions as an ozone generating means and mixes and reacts with ozone that has generated cold air containing an odor component, thereby deoxidizing and deodorizing the odor component.

この光触媒モジュール(15)から風下側の送風経路(12)内には、所定距離を空けて、2酸化マンガンを主体にしたハニカム形状の焼結体を触媒としたオゾン分解手段(16)を設置しており、送風経路(12)に流入した臭気物質を触媒の表面に吸着しオゾンで分解するとともに、臭気物質と反応しないでそのまま流下する余剰オゾンを分解するようにしている。   Ozone decomposing means (16) using a honeycomb-shaped sintered body mainly composed of manganese dioxide as a catalyst is installed in the ventilation path (12) on the leeward side from this photocatalyst module (15). The odorous substance that has flowed into the ventilation path (12) is adsorbed on the surface of the catalyst and decomposed by ozone, and the excess ozone that flows down without reacting with the odorous substance is decomposed.

しかして、前記送風経路(12)におけるオゾン発生手段である光触媒モジュール(15)の風上側には風下側へ冷蔵室(2)内冷気を送る専用の送風装置であるファン(22)を設けている。さらに、光触媒モジュール(15)の風上側の対極(19)に沿って光触媒モジュールへの風量を抑制する防風壁(23)を設けるとともに、送風経路(12)における光触媒モジュール(15)の上方を開放して前記光触媒モジュール(15)部分をバイパスするバイパス風路(25)を形成している。   Therefore, a fan (22), which is a dedicated air blower for sending cold air in the refrigerator compartment (2) to the leeward side, is provided on the windward side of the photocatalyst module (15) which is an ozone generating means in the air blowing path (12). Yes. In addition, a windbreak wall (23) is provided along the counter-winding electrode (19) on the windward side of the photocatalyst module (15) to suppress the air volume to the photocatalyst module, and the top of the photocatalyst module (15) is opened in the ventilation path (12) Thus, a bypass air passage (25) that bypasses the photocatalyst module (15) portion is formed.

また、前記防風壁(23)の表面には、風の流れ方向に沿って数カ所の透孔(24)を穿設し、ファン(22)からの空気がこの透孔(24)を通過して光触媒モジュール(15)内に少量流れるようにしており、さらに、光触媒モジュール(15)の下流側には、温度ヒューズ(26)を近接して取り付けている。   The surface of the windbreak wall (23) is provided with several through holes (24) along the wind flow direction, and air from the fan (22) passes through the through holes (24). A small amount flows in the photocatalyst module (15), and a thermal fuse (26) is attached in the vicinity of the downstream side of the photocatalyst module (15).

したがって、脱臭装置(13)における光触媒モジュール(15)の放電電極(18)や対極(19)に高圧電源(20)からの高電圧を供給することで、空間放電によってオゾンが発生するが、光触媒モジュール(15)の風上側には防風壁(23)を配設しており、防風壁(23)の上方における送風経路(12)にはバイパス風路(25)を形成しているので、ファン(22)からの庫内冷気は、矢印のように、バイパス風路(25)と防風壁(23)に数カ所設けた透孔(24)によって脱臭のために必要な所定の風量を確保して流通させることができ、発生するオゾンにより、送風経路(12)内および下流のオゾン分解手段(16)に吸着した臭気を分解して確実に脱臭することができる。そして、余剰のオゾンはオゾン分解手段(16)によって、冷蔵室(2)や野菜室(4)内に漏れ出ることなく分解する。   Therefore, ozone is generated by spatial discharge by supplying high voltage from the high-voltage power supply (20) to the discharge electrode (18) and counter electrode (19) of the photocatalyst module (15) in the deodorization device (13). A windbreak wall (23) is arranged on the windward side of the module (15), and a bypass airflow path (25) is formed in the ventilation path (12) above the windbreak wall (23). As shown by the arrow, the cool air in the cabinet from (22) has a predetermined air volume necessary for deodorization by the through holes (24) provided in several places in the bypass air passage (25) and the windbreak wall (23). The odor adsorbed by the ozone decomposing means (16) in the air flow path (12) and in the downstream can be decomposed and reliably deodorized by the generated ozone. And surplus ozone is decomposed by the ozone decomposition means (16) without leaking into the refrigerator compartment (2) and the vegetable compartment (4).

このとき、送風経路(12)内を流下する冷気は、前記防風壁(23)によって遮蔽されるため、その多くはバイパス風路(25)を流れるが、冷気の一部は、防風壁面に数カ所に設けた前記透孔(24)によって、風速を0.25m/s程度の抑制された風量として光触媒モジュール(15)に至ることになる。   At this time, since the cool air flowing down in the air flow path (12) is shielded by the windbreak wall (23), most of it flows through the bypass airflow path (25). The through-hole (24) provided in the photocatalyst module (15) reaches the photocatalyst module (15) with the air velocity suppressed to about 0.25 m / s.

そのため、万一冷媒配管の破損などによって、可燃性冷媒が冷凍サイクル中より漏れ出て前記オゾン発生部である光触媒モジュール(15)の部位に至っても、防風壁(23)により風量が抑制されることから火災に至る冷媒供給量とはならないものである。そして、たとえ高電圧の発生で引火し燃焼し始めたとしても、透孔(24)によって光触媒モジュール(15)への可燃性冷媒を含んだ空気の供給は透孔(24)を通過した少量のみであり、燃焼を抑制するとともに他の周辺部品への燃え移りを未然に防止することができる。   Therefore, even if flammable refrigerant leaks out of the refrigeration cycle and reaches the part of the photocatalyst module (15), which is the ozone generation unit, due to breakage of the refrigerant piping, the air volume is suppressed by the windbreak wall (23). Therefore, it does not become the refrigerant supply amount that leads to a fire. And even if it begins to ignite and burn due to the generation of high voltage, the supply of air containing a flammable refrigerant to the photocatalyst module (15) through the through hole (24) is only a small amount that has passed through the through hole (24). Thus, it is possible to suppress combustion and prevent the transfer to other peripheral parts.

さらにこのとき、透孔(24)を通過する風は、光触媒モジュール(15)近傍の温度ヒューズ(26)の部分を流下することになり、燃焼による温度上昇を迅速に検知して温度ヒューズ(26)を断電し、光触媒モジュール(15)への電力供給を遮断するものである。   Further, at this time, the wind passing through the through hole (24) flows down the portion of the temperature fuse (26) in the vicinity of the photocatalyst module (15). ) To cut off the power supply to the photocatalyst module (15).

また、送風手段としてのファン(22)は、脱臭装置(13)の風上側に配置しているので、ファンを風下側に配置した場合に比して、万一、オゾン分解手段(16)で分解し切れなかったオゾンが流下してファンを腐食させるようなことを未然に防止することができる。   Moreover, since the fan (22) as a ventilation means is arrange | positioned on the windward side of a deodorizing apparatus (13), compared with the case where a fan is arrange | positioned on the leeward side, by an ozone decomposition | disassembly means (16) It is possible to prevent the ozone that has not been completely decomposed from flowing down and corrode the fan.

なお、ファン(22)は、特に図示しないが、前記とは逆に、脱臭装置(13)の風下側に配置するようにしてもよい。この場合は、冷蔵室(2)内に存在するアンモニアなどの腐食性ガスをファン(22)に至る前に脱臭装置(13)で吸着し分解することができるため、ファンにおける電子部品などの腐食を防ぐことができる。また、ファン(22)の下流側においては乱流を生じることから、ファン(22)は脱臭装置(13)の風下側に配置する方が、設置スペースの削減のためには有利であり、脱臭装置(13)に対してより均一な送風をおこなうことができる。   The fan (22) is not particularly shown, but may be disposed on the leeward side of the deodorizing device (13), contrary to the above. In this case, corrosive gases such as ammonia present in the refrigerator compartment (2) can be adsorbed and decomposed by the deodorizing device (13) before reaching the fan (22). Can be prevented. In addition, since turbulent flow is generated downstream of the fan (22), it is more advantageous for the fan (22) to be arranged on the leeward side of the deodorizing device (13) in order to reduce the installation space. More uniform air can be sent to the device (13).

また、脱臭装置(13)への送風手段としては、冷気循環のための冷蔵用ファン(8)の送風力を流用するのではなく、上記のように、冷蔵庫における脱臭装置(13)の送風経路(12)内に脱臭専用のファン(22)を設けるようにした方がよい。このようにすれば、圧力損失が大きい脱臭装置(13)による冷蔵庫全体の冷気循環送風量の低下を引き起こすことなく、冷却性能の劣化を防ぐことができ、脱臭装置(13)への送風を独立して制御することができる。   Moreover, as a blowing means to the deodorizing device (13), the air blowing path of the deodorizing device (13) in the refrigerator is used instead of diverting the blowing force of the refrigeration fan (8) for circulating cold air as described above. (12) It is better to have a dedicated fan (22) for deodorization. In this way, deterioration of the cooling performance can be prevented without causing a decrease in the amount of cool air circulation in the entire refrigerator due to the deodorizing device (13) with a large pressure loss, and blowing to the deodorizing device (13) is independent. Can be controlled.

なお、上記実施例においては、脱臭装置(13)を冷蔵室(2)の下方の冷気通路(12)に配置した構成で説明したが、冷凍室(5)、あるいは他の貯蔵空間に配置しても同様の効果を得られることは言うまでもない。   In the above embodiment, the deodorizing device (13) is described as being arranged in the cold air passage (12) below the refrigerator compartment (2). However, the deodorizing device (13) is arranged in the freezer compartment (5) or other storage space. However, it goes without saying that the same effect can be obtained.

また、上記実施例におけるオゾン発生手段は、光触媒フィルタ(17)および放電電極(18)と対極(19)とからなる光触媒モジュール(15)で構成した空間放電機構としたが、これに限らず、オゾン発生電極と、昇圧トランスからなる沿面放電式のオゾン発生器から構成したものでもよい。   In addition, the ozone generation means in the above embodiment is a space discharge mechanism configured by a photocatalyst module (15) including a photocatalyst filter (17) and a discharge electrode (18) and a counter electrode (19), but is not limited thereto. It may be composed of an ozone generating electrode and a creeping discharge type ozone generator composed of a step-up transformer.

例えば、図3に示すように、直冷式冷蔵庫(1′)における冷蔵室(2′)の天井部位に、ポリカーボネート樹脂からなるスペーサ(17′)を間に介した放電電極(18′)と対極(19′)を設けるとともに、その上部にバイパス風路(25′)を形成し、下流側に温度ヒューズ(26′)、およびオゾン分解手段(16′)を配置した脱臭装置(13′)を設け、その上流側の前面を前記実施例と同様に図示しない透孔を穿設した防風壁(23′)で覆い、さらに、風上側に専用ファン(22′)や庫内灯(27)を配して脱臭装置(13)とともに専用ファン(22)を駆動し、矢印の方向に室内冷気を循環する脱臭運転をおこなうような冷蔵庫構成にも展開できるものである。   For example, as shown in FIG. 3, a discharge electrode (18 ') with a spacer (17') made of polycarbonate resin interposed in a ceiling part of a refrigerator compartment (2 ') in a direct cooling refrigerator (1'). A deodorizing device (13 ') provided with a counter electrode (19'), a bypass air passage (25 ') formed in the upper part thereof, and a thermal fuse (26') and ozone decomposing means (16 ') arranged on the downstream side The front surface on the upstream side is covered with a windbreak wall (23 ') having a through hole (not shown) in the same manner as in the previous embodiment, and a dedicated fan (22') and an interior lamp (27) are installed on the windward side. It can also be deployed in a refrigerator configuration in which a dedicated fan (22) is driven together with a deodorizing device (13) to perform a deodorizing operation in which indoor cold air is circulated in the direction of the arrow.

このように構成することで、万一、可燃冷媒の漏洩時に金属片など異物の侵入により異常放電を起こして発火しても、燃焼を抑制するとともに他の周辺部品への燃え移りを未然に防止することができる。   By configuring in this way, even if a flammable refrigerant leaks, even if an abnormal discharge occurs due to the intrusion of a foreign object such as a metal piece, it suppresses combustion and prevents burning to other peripheral parts in advance. be able to.

本発明の1実施形態を示す冷蔵庫の縦断面図である。It is a longitudinal cross-sectional view of the refrigerator which shows one Embodiment of this invention. 図1における脱臭装置の概略構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows schematic structure of the deodorizing apparatus in FIG. 本発明の他の実施例の脱臭装置部分を示す縦断面図である。It is a longitudinal cross-sectional view which shows the deodorizing apparatus part of the other Example of this invention. 図1の脱臭装置の従来例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the prior art example of the deodorizing apparatus of FIG. 図1の脱臭装置の他の従来例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the other conventional example of the deodorizing apparatus of FIG.

符号の説明Explanation of symbols

1 冷蔵庫本体
2 冷蔵室
12 送風経路
13、13′ 脱臭装置
15 光触媒モジュール
16、16′ オゾン分解手段
17 光触媒フィルタ
17′ スペーサ
18、18′ 放電電極
19、19′ 対極
20 電源回路
21 高電圧トランス
22、22′ ファン
23、23′ 防風壁
24 透孔
25、25′ バイパス風路
26、26′ 温度ヒューズ
1 Refrigerator body 2 Refrigerated room
12 Air flow path
13, 13 'deodorization device
15 Photocatalyst module
16, 16 'ozonolysis means
17 Photocatalytic filter
17 ′ spacer
18, 18 ′ discharge electrode
19, 19 ′ counter electrode
20 Power circuit
21 high voltage transformer
22, 22 ′ fans
23, 23 ′ Windbreak
24 through hole
25, 25 ′ bypass air passage
26, 26 ′ thermal fuse

Claims (6)

冷凍サイクルの冷媒として可燃性冷媒を用いた冷蔵庫内に設けられ、高電圧放電によってオゾンを発生させる手段と発生させたオゾンを分解するオゾン分解手段とからなる脱臭装置を送風手段によって送風される送風経路内に配置したものにおいて、前記送風経路内には、前記オゾン発生手段をバイパスするバイパス風路を前記オゾン発生手段に開放して形成するとともにオゾン発生手段への風量を抑制する防風壁を設けて前記オゾン発生手段への風量より前記バイパス風路への風量を多くしたことを特徴とする冷蔵庫。 Blower that is provided in a refrigerator that uses a flammable refrigerant as a refrigerant for a refrigeration cycle and that is blown by a blowing means through a deodorizing device that includes means for generating ozone by high-voltage discharge and ozone decomposing means for decomposing the generated ozone. In the air passage, a bypass air passage that bypasses the ozone generating means is formed open to the ozone generating means, and a windbreak wall that suppresses the air volume to the ozone generating means is provided in the air blowing path. The refrigerator is characterized in that the air flow to the bypass air passage is made larger than the air flow to the ozone generating means . 防風壁をオゾン発生手段の風上側に配置し、この防風壁にオゾン発生手段へ少量の風を供給する透孔を穿設したことを特徴とする請求項1記載の冷蔵庫。 2. The refrigerator according to claim 1, wherein the windbreak wall is disposed on the windward side of the ozone generating means, and a through hole is provided in the windbreak wall for supplying a small amount of wind to the ozone generating means. 送風手段を脱臭装置の風上側に配置したことを特徴とする請求項1または2記載の冷蔵庫。 The refrigerator according to claim 1 or 2, wherein the blowing means is arranged on the windward side of the deodorizing device. 送風手段を脱臭装置の風下側に配置したことを特徴とする請求項1または2記載の冷蔵庫。 The refrigerator according to claim 1 or 2, wherein the blowing means is arranged on the leeward side of the deodorizing device. 脱臭装置への送風を専用におこなう送風手段を設けたことを特徴とする請求項3または4記載の冷蔵庫。 The refrigerator according to claim 3 or 4, further comprising a blowing means for exclusively blowing air to the deodorizing device. オゾンを発生させる高電圧放電手段が、放電電極と光触媒モジュールとから構成されていることを特徴とする請求項1記載の冷蔵庫。 2. The refrigerator according to claim 1, wherein the high-voltage discharge means for generating ozone comprises a discharge electrode and a photocatalyst module.
JP2006277254A 2006-10-11 2006-10-11 refrigerator Expired - Fee Related JP4607844B2 (en)

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JP5248275B2 (en) * 2008-11-18 2013-07-31 株式会社東芝 refrigerator
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WO2017209434A1 (en) 2016-06-02 2017-12-07 서울바이오시스주식회사 Deodorization module and storage device including deodorization module

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JP2002277152A (en) * 2001-03-14 2002-09-25 Toshiba Corp Refrigerator
JP2003106753A (en) * 2001-09-28 2003-04-09 Toshiba Corp Refrigerator
JP2003235952A (en) * 2002-02-18 2003-08-26 Daitoo Kk Sterilizing and deodorizing device
JP2003339839A (en) * 2002-05-30 2003-12-02 Toshiba Corp Deodorizing device
JP2005106298A (en) * 2003-09-26 2005-04-21 Toshiba Corp Refrigerator

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2002277152A (en) * 2001-03-14 2002-09-25 Toshiba Corp Refrigerator
JP2003106753A (en) * 2001-09-28 2003-04-09 Toshiba Corp Refrigerator
JP2003235952A (en) * 2002-02-18 2003-08-26 Daitoo Kk Sterilizing and deodorizing device
JP2003339839A (en) * 2002-05-30 2003-12-02 Toshiba Corp Deodorizing device
JP2005106298A (en) * 2003-09-26 2005-04-21 Toshiba Corp Refrigerator

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