JP2005024183A

JP2005024183A - Air-conditioning system

Info

Publication number: JP2005024183A
Application number: JP2003190628A
Authority: JP
Inventors: Takuji Nakamura; 卓司中村; Minoru Kawashima; 実川島; Yoshihisa Takebayashi; 芳久竹林
Original assignee: Shimizu Construction Co Ltd; Shimizu Corp
Current assignee: Shimizu Construction Co Ltd; Shimizu Corp
Priority date: 2003-07-02
Filing date: 2003-07-02
Publication date: 2005-01-27

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning system capable of efficiently and surely obtain a purifying effect by a photocatalyst. <P>SOLUTION: This air conditioning system wherein the air treated by an air conditioner 5 is supplied to a room as a supply air SA, the air in the room is sucked from a suction port 10 as a return air RA and returned to the air conditioner to be circulated, and the circulated air is purified by the photocatalyst on the way of the circulation passage, is constituted so that the air conditioner is provided with a purification module 21 by the photocatalyst, and a light source 22 for applying the light to the purifying module, and the suction port 10 is assembled in a lighting apparatus 9 mounted on a ceiling face 2, and the photocatalyst is held on a surface of the lighting apparatus. The system is constituted so that a window blind 15 is mounted to the glass 4, the photocatalyst is held on the surface of at least one of the window glass and the window blind, and further, a floor material 32 having air permeability is applied, so that the supply air SA is supplied from the floor face through the floor material itself, and the photocatalyst is held on the floor material. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は建物における空調システム、特に光触媒により空気を清浄化しつつ循環させる構成の空調システムに関する。
【０００２】
【従来の技術】
従来の空調システムは室内温湿度の調整と浮遊粉塵の低減が主目的であったが、最近においてはそれに加えて臭気やＶＯＣ（揮発性有機化合物）、細菌等を除去し得るより高度の空気清浄化機能が要求され、そのため光触媒による酸化分解作用を利用して循環空気を清浄化することも行われている。
【０００３】
たとえば特許文献１には、床から空調エアを吹き出すとともに、吸込スリットを有する照明器具を天井に配設した床吹き出し空調システムにおいて、照明器具のカサ部の表面や、蛍光灯の外面、天井ボードの表面に光触媒を担持させ、循環空気を光触媒に接触させることで汚染物質を除去するものが提案されている。
【０００４】
【特許文献１】
特開２０００−６５３９６号公報
【０００５】
【発明が解決しようとする課題】
しかし、上記従来の空調システムでは循環空気が光触媒に対して効率的に接触するとはいえないので、必ずしも充分な浄化効果を期待できるものではなく、そのため、より効率的かつ確実に浄化効果が得られる空調システムの開発が望まれていた。
【０００６】
【課題を解決するための手段】
上記事情に鑑み、請求項１の発明は、空調機により処理した空気を給気として室内に供給し、室内の空気を還気として吸込口から吸い込んで空調機に戻して循環させるとともに、その循環経路の途中で光触媒により循環空気を清浄化する構成の空調システムであって、空調機内に光触媒による浄化モジュールと、その浄化モジュールに光を照射する光源とを設け、天井面に設けた照明器具に吸込口を組み込み、その照明器具の表面に光触媒を担持させたことを特徴とする。
【０００７】
請求項２の発明は、請求項１の発明の空調システムにおいて、窓ガラスに面してブラインドを設け、窓ガラスとブラインドの少なくともいずれかの表面に光触媒を担持させたことを特徴とする。
【０００８】
請求項３の発明は、請求項１または２の発明の空調システムにおいて、通気性を有する床材を採用してその床材自体を通過させて床面から給気を供給し、その床材に光触媒を担持させたことを特徴とする。
【０００９】
【発明の実施の形態】
本発明の一実施形態を図１を参照して説明する。図中符号１は空調対象室、２はその天井面、３は還気チャンバーとしての天井チャンバー、４は窓ガラスであり、５は空調機である。
【００１０】
空調機５は、内蔵している冷却器、加熱器、加湿器、フィルタ（いずれも図示略）により温湿度調整と粉塵除去を行い、送風機６により給気ダクト７、吹出口８を通して室内に給気ＳＡを供給し、天井面２に設けた照明器具９に組み込んでいる吸込口１０から還気ＲＡを天井チャンバー３に吸い込み、主還気口１１から還気ダクト１２を通して空調機５に戻して循環させるようになっている。なお、還気ＲＡの一部は排気ＥＡとして排気ダクト１３により外部に排気し、それに見合う量の外気ＯＡを外気ダクト１４から取り入れるようになっている。
【００１１】
また、窓ガラス４の前面にはブラインド１５が設けられていて、それら窓ガラス４とブラインド１５との間は日射ＳＳにより周囲よりも温度が上昇することからここでは自ずと上昇気流が生じるようになっており、そこを上昇した還気ＲＡは天井面２に設けたスリット１６から天井チャンバー３に吸い込まれるようになっている。
【００１２】
本実施形態の空調システムは、上記のようにして循環する循環空気（すなわち給気ＳＡおよび還気ＲＡ）の循環経路の途中において、光触媒による酸化分解作用によって循環空気を効率的に清浄化し得るものとなっている。
【００１３】
すなわち、上記の空調機５には、光触媒による浄化モジュール２１と、その浄化モジュール２１に光を照射する光源２２が内蔵されており、この空調機５では温湿度調整および粉塵除去に加えて浄化モジュール２１による清浄化処理がなされ、還気ＲＡや外気ＯＡに含まれる臭気やＶＯＣ、細菌等の汚染物質が浄化モジュール２１によって効率的に分解除去され、給気ＳＡの全量が充分に清浄化されたうえで室内に給気されるようになっている。浄化モジュール２１における光触媒としてはアナターゼ型二酸化チタン等の紫外光反応型光触媒が好適に採用可能であり、その光源２２としてはブラックライト（紫外光源）を採用すれば良い。
【００１４】
それに加え、本実施形態の空調システムでは、吸込口１０を組み込んでいる照明器具９の表面に光触媒を担持させており、室内からの還気ＲＡが吸込口１０に吸い込まれる際には自ずと照明器具９の表面に接触してそこで浄化がなされるようになっている。照明器具９は常時点灯されていることが通常であるし、仮に消灯されていても室内には窓ガラス４からの適度の日射があるので光触媒反応は支障なく生じるが、ここでの光触媒としては窒素等をドーピングしたアナターゼ型二酸化チタン等の可視光反応型の光触媒を採用することが好ましい。
【００１５】
さらに、本実施形態の空調システムでは、窓ガラス４およびブラインド１５の表面にも光触媒を担持させており、それらの間を上昇する還気ＲＡは自ずと窓ガラス４の内面およびブラインド１５に接してそこで浄化がなされるようになっている。窓ガラス４には充分な日射が期待できるので少なくとも昼間においては充分な光触媒効果が期待でき、ここでの光触媒は可視光反応型のもの採用すれば良い。なお、窓ガラス４の外表面にも光触媒を担持させれば防汚効果や水滴付着防止効果が得られる。
【００１６】
以上のように、本実施形態の空調システムにあっては、空調機５の内部に光触媒による浄化モジュール２１とその光源２２を設けるとともに、吸込口１０を組み込んだ照明器具９の表面と、窓ガラス４とブラインド１５の表面に光触媒を担持させ、それにより循環空気がそれらの光触媒に確実に接触し、したがって循環空気中の汚染物質を光触媒により効率的に浄化することができ、室内で汚染物質が発生したり、あるいは室外から汚染物質が入り込んだとしても、室内を常に清浄で健康的かつ快適な空間として維持することができる。
【００１７】
図２は他の実施形態を示す。これは、給気チャンバーとしての床チャンバー３１を設けるとともに、床材３２として通気性を有する素材を採用し、その床材３２自体を通過させて床全面から給気ＳＡを室内に上向きに吹き出すようにしたこと以外は、上記実施形態と同様に構成されているものである。そして、本実施形態では床材３２に光触媒を担持させており、室内空気がその床材３２に直接的に接触することによる浄化効果を期待でき、かつ、空調機５からの給気ＳＡ中に汚染物質が僅かに含まれている場合にも床材３２を通過する際に確実に浄化することができるので、上記実施形態の場合よりも優れた浄化効果が得られる。
【００１８】
以上で本発明の実施形態を説明したが、本発明は上記実施形態に限定されることなく、少なくとも空調機５と照明器具９に光触媒による浄化機能を備える限りにおいては適宜の設計的変更が可能である。たとえば、上記実施形態では空調機５内に浄化モジュール２１とその光源２２を設けるとともに、吸込口１０を組み込んだ照明器具９の表面と、窓ガラス４とブラインド１５の双方の表面、さらに床面吹き出し方式の場合には床材３２に対して光触媒を担持させるようにしたが、必ずしもその全てを具備することはなく、建物の用途や規模、要求される清浄化性能等の条件に応じてそれらの一部を適宜選択して採用することでも良い。あるいは、上記に加えてさらに他の建材や器具にも光触媒による浄化機能を持たせることが考えられ、たとえば室内壁面全体や天井面全体にも光触媒を担持させることも考えられる。勿論、ブラインド１５としては図示例のようなベネシャンブラインドのみならず、適宜の形式のブラインドが採用可能である。
【００１９】
また、空調システムとしての基本的な構成も適宜の変更が可能であり、たとえば、空調機５としてはエアハンドリングユニット、ファンコイルユニット、パッケージエアコン等、適宜の形式のものが採用可能であるし、その設置の形態も床置型や天井埋込型、壁掛型等の如何を問わない。勿論、上記実施形態のように天井チャンバー３を還気チャンバーとして設けることに代えて、天井内に還気ダクトを設けて吸込口１０に直接的に接続する構成としたり、その場合には天井チャンバー３を給気チャンバーとして給気ダクトを省略することも考えられる。
【００２０】
【発明の効果】
請求項１の発明によれば、空調機内に光触媒による浄化モジュールと、その浄化モジュールに光を照射する光源とを設けたので、還気や外気に含まれる臭気やＶＯＣ、細菌等の汚染物質が空調機内において浄化モジュールによって効率的に分解除去でき、また、天井面に設けた照明器具に吸込口を組み込んでその照明器具の表面に光触媒を担持させたので、室内からの還気が吸込口に吸い込まれる際に自ずと照明器具の表面に接触してそこで浄化がなされ、以上により室内を常に清浄で健康的かつ快適な空間として維持することができる。
【００２１】
請求項２の発明は、上記に加え、窓ガラスとブラインドの少なくともいずれかの表面に光触媒を担持させたので、それらの間を還気が上昇する際に光触媒に接触することで自ずと浄化され、より効果的である。
【００２２】
請求項３の発明は、上記に加え、通気性を有する床材自体を通過させて床面から給気を吹き出し、その床材に光触媒を担持させたので、室内空気が床材に直接接触することで浄化効果が期待でき、かつ、空調機からの給気中に汚染物質が僅かに含まれていたとしても給気が床材を通過する際に確実に浄化することができる。
【図面の簡単な説明】
【図１】本発明の空調システムの一実施形態を示す図である。
【図２】同、他の実施形態を示す図である。
【符号の説明】
１空調対象室
２天井面
３天井チャンバー
４窓ガラス
５空調機
８吹出口
９照明器具
１０吸込口
１５ブラインド
２１浄化モジュール
２２光源
３１床チャンバー
３２床材
ＳＡ給気
ＲＡ還気[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioning system in a building, and more particularly, to an air conditioning system configured to circulate while cleaning air with a photocatalyst.
[0002]
[Prior art]
Conventional air conditioning systems were mainly aimed at adjusting indoor temperature and humidity and reducing suspended dust. Recently, however, in addition to this, a more sophisticated air cleaner that can remove odors, VOCs (volatile organic compounds), bacteria, etc. Therefore, the circulating air is also purified by utilizing the oxidative decomposition action by the photocatalyst.
[0003]
For example, in Patent Document 1, in a floor blowing air conditioning system in which air-conditioning air is blown from the floor and a lighting fixture having a suction slit is arranged on the ceiling, the surface of the lamp portion of the lighting fixture, the outer surface of the fluorescent lamp, the ceiling board There has been proposed a method in which a photocatalyst is supported on the surface and contaminants are removed by bringing circulating air into contact with the photocatalyst.
[0004]
[Patent Document 1]
JP 2000-65396 A
[Problems to be solved by the invention]
However, in the conventional air conditioning system, it cannot be said that the circulating air efficiently contacts the photocatalyst. Therefore, it is not always possible to expect a sufficient purification effect. Therefore, the purification effect can be obtained more efficiently and reliably. The development of an air conditioning system was desired.
[0006]
[Means for Solving the Problems]
In view of the above circumstances, the invention of claim 1 supplies the air processed by the air conditioner to the room as supply air, sucks the room air from the suction port as return air, circulates it back to the air conditioner, and circulates the air. An air conditioning system configured to purify circulating air with a photocatalyst in the middle of a route, provided with a photocatalyst purification module in the air conditioner and a light source for irradiating the purification module with light, and provided on a lighting fixture provided on the ceiling surface A suction port is incorporated, and a photocatalyst is supported on the surface of the lighting fixture.
[0007]
According to a second aspect of the present invention, in the air conditioning system of the first aspect, a blind is provided facing the window glass, and a photocatalyst is supported on at least one of the window glass and the blind.
[0008]
According to a third aspect of the present invention, in the air conditioning system of the first or second aspect of the present invention, an air-permeable flooring is adopted, the flooring itself is passed through and air is supplied from the floor, and the flooring is supplied to the flooring. It is characterized by supporting a photocatalyst.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIG. In the figure, reference numeral 1 denotes an air-conditioning target room, 2 a ceiling surface thereof, 3 a ceiling chamber as a return air chamber, 4 a window glass, and 5 an air conditioner.
[0010]
The air conditioner 5 adjusts the temperature and humidity and removes dust with a built-in cooler, heater, humidifier, and filter (all not shown), and supplies air to the room through the air supply duct 7 and air outlet 8 with the blower 6. The air SA is supplied, the return air RA is sucked into the ceiling chamber 3 from the suction port 10 incorporated in the lighting fixture 9 provided on the ceiling surface 2, and is returned from the main return air port 11 to the air conditioner 5 through the return air duct 12. It is designed to circulate. A part of the return air RA is exhausted to the outside by the exhaust duct 13 as the exhaust EA, and a corresponding amount of the outside air OA is taken in from the outside air duct 14.
[0011]
Further, a blind 15 is provided on the front surface of the window glass 4 and the temperature between the window glass 4 and the blind 15 rises more than the surroundings due to the solar radiation SS. The return air RA rising there is sucked into the ceiling chamber 3 from the slit 16 provided on the ceiling surface 2.
[0012]
The air conditioning system of the present embodiment can efficiently clean the circulating air by the oxidative decomposition action by the photocatalyst in the middle of the circulating path of the circulating air (that is, the supply air SA and the return air RA) that circulates as described above. It has become.
[0013]
That is, the air conditioner 5 includes a purification module 21 using a photocatalyst and a light source 22 that irradiates the purification module 21 with light. In this air conditioner 5, in addition to temperature and humidity adjustment and dust removal, the purification module. 21. The odor, VOC, bacteria and other contaminants contained in the return air RA and outside air OA were efficiently decomposed and removed by the purification module 21, and the entire amount of the supply air SA was sufficiently cleaned. In addition, it is designed to be supplied indoors. As the photocatalyst in the purification module 21, an ultraviolet light reaction type photocatalyst such as anatase type titanium dioxide can be suitably employed, and a black light (ultraviolet light source) may be employed as the light source 22.
[0014]
In addition, in the air conditioning system of this embodiment, a photocatalyst is supported on the surface of the lighting fixture 9 incorporating the suction port 10, and when the return air RA from the room is sucked into the suction port 10, the lighting fixture is naturally 9 is brought into contact with the surface and purification is carried out there. The lighting fixture 9 is normally lit up, and even if it is turned off, there is moderate solar radiation from the window glass 4 in the room, so the photocatalytic reaction occurs without any problem, but the photocatalyst here is It is preferable to employ a visible light reaction type photocatalyst such as anatase type titanium dioxide doped with nitrogen or the like.
[0015]
Further, in the air conditioning system of the present embodiment, the photocatalyst is also carried on the surfaces of the window glass 4 and the blind 15, and the return air RA rising between them naturally contacts the inner surface of the window glass 4 and the blind 15 there. Purification has been made. Since sufficient solar radiation can be expected on the window glass 4, a sufficient photocatalytic effect can be expected at least during the daytime. The photocatalyst here may be a visible light reaction type. In addition, if a photocatalyst is carried also on the outer surface of the window glass 4, an antifouling effect and a water droplet adhesion preventing effect can be obtained.
[0016]
As described above, in the air conditioning system of the present embodiment, the purification module 21 using the photocatalyst and the light source 22 are provided inside the air conditioner 5, the surface of the lighting fixture 9 incorporating the suction port 10, and the window glass. 4 and the surface of the blind 15 are loaded with photocatalysts, so that the circulating air reliably contacts the photocatalysts, and therefore, pollutants in the circulating air can be efficiently purified by the photocatalyst, Even if it is generated or a contaminant enters from outside the room, the room can always be maintained as a clean, healthy and comfortable space.
[0017]
FIG. 2 shows another embodiment. This is provided with a floor chamber 31 as an air supply chamber and adopts a material having air permeability as the floor material 32 so that the air supply SA is blown upward from the entire floor through the floor material 32 itself. Except for the above, the configuration is the same as in the above embodiment. In this embodiment, the photocatalyst is supported on the flooring 32, and a purification effect can be expected by the indoor air coming into direct contact with the flooring 32, and in the supply air SA from the air conditioner 5. Even when the contaminant is slightly contained, it can be surely purified when passing through the flooring 32, so that a purification effect superior to that in the above embodiment can be obtained.
[0018]
Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and appropriate design changes are possible as long as at least the air conditioner 5 and the lighting fixture 9 have a purification function using a photocatalyst. It is. For example, in the above-described embodiment, the purification module 21 and its light source 22 are provided in the air conditioner 5, the surface of the lighting fixture 9 incorporating the suction port 10, the surfaces of both the window glass 4 and the blind 15, and the floor surface blowing. In the case of the system, the photocatalyst is supported on the flooring 32, but not all of them are provided, depending on conditions such as the use and scale of the building, and the required cleaning performance. It is also possible to select and employ a part appropriately. Alternatively, in addition to the above, it is conceivable that other building materials and instruments also have a function of purifying with a photocatalyst. For example, the photocatalyst may be supported on the entire indoor wall surface or the entire ceiling surface. Of course, as the blind 15, not only a Venetian blind as shown in the figure but also an appropriate type of blind can be employed.
[0019]
In addition, the basic configuration of the air conditioning system can be changed as appropriate. For example, as the air conditioner 5, an air handling unit, a fan coil unit, a packaged air conditioner, or the like can be used. The installation form may be any of a floor-mounted type, a ceiling-embedded type, a wall-mounted type, and the like. Of course, instead of providing the ceiling chamber 3 as a return air chamber as in the above-described embodiment, a configuration is provided in which a return air duct is provided in the ceiling and directly connected to the suction port 10. It is also conceivable to omit the air supply duct with 3 as the air supply chamber.
[0020]
【The invention's effect】
According to the invention of claim 1, since the purification module by the photocatalyst and the light source for irradiating the purification module with light are provided in the air conditioner, the odor, VOC, bacteria, and other contaminants contained in the return air and outside air are present. It can be efficiently decomposed and removed by the purification module in the air conditioner, and the suction port is built in the lighting fixture provided on the ceiling surface and the photocatalyst is supported on the surface of the lighting fixture, so that the return air from the room is at the suction port. When it is inhaled, it naturally contacts the surface of the luminaire and is cleaned there, so that the room can always be maintained as a clean, healthy and comfortable space.
[0021]
In addition to the above, the invention of claim 2 carries the photocatalyst on the surface of at least one of the window glass and the blind, and thus is naturally purified by contacting the photocatalyst when the return air rises between them. More effective.
[0022]
According to the invention of claim 3, in addition to the above, since the air-permeable floor material itself is passed through and the supply air is blown out from the floor surface, and the photocatalyst is supported on the floor material, the indoor air is in direct contact with the floor material. Thus, a purification effect can be expected, and even when the air supply from the air conditioner contains a slight amount of contaminants, the supply air can be reliably purified when passing through the flooring.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of an air conditioning system of the present invention.
FIG. 2 is a diagram showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air-conditioning object room 2 Ceiling surface 3 Ceiling chamber 4 Window glass 5 Air conditioner 8 Air outlet 9 Lighting fixture 10 Suction port 15 Blind 21 Purification module 22 Light source 31 Floor chamber 32 Floor material SA Supply air RA Return air

Claims

The air treated by the air conditioner is supplied to the room as supply air, and the indoor air is sucked in as return air from the suction port and returned to the air conditioner for circulation, and the circulating air is purified by a photocatalyst in the middle of the circulation path. An air conditioning system having a configuration, wherein a purification module using a photocatalyst and a light source for irradiating light to the purification module are provided in the air conditioner, and a suction port is incorporated in a lighting fixture provided on the ceiling surface, and the photocatalyst is provided on the surface of the lighting fixture. An air conditioning system characterized by carrying

2. The air conditioning system according to claim 1, wherein a blind is provided facing the window glass, and a photocatalyst is supported on at least one surface of the window glass and the blind.

The air conditioning system according to claim 1 or 2, wherein a floor material having air permeability is adopted, air is supplied from the floor surface through the floor material itself, and a photocatalyst is supported on the floor material. .