JP2004239536A - Air purification system - Google Patents

Air purification system Download PDF

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JP2004239536A
JP2004239536A JP2003030164A JP2003030164A JP2004239536A JP 2004239536 A JP2004239536 A JP 2004239536A JP 2003030164 A JP2003030164 A JP 2003030164A JP 2003030164 A JP2003030164 A JP 2003030164A JP 2004239536 A JP2004239536 A JP 2004239536A
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holder
air
hole
detection holder
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JP4114496B2 (en
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Kentaro Nagayoshi
健太郎 永吉
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Fujitsu General Ltd
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Fujitsu General Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air purification system in which an inexpensive and easy-to-use formaldehyde detecting device is loaded. <P>SOLUTION: A gas detecting device 20 is composed of a detecting part 21 formed by attaching a detection paper 21b impregnated with a reagent, to a frame body 21a, and a casing having an air inlet 22a formed by opening its front face, and a ventilating hole 22b formed on its lower face corresponding to a discharge hole 13a of a second partition 13. The gas detecting device 20 comprises a detecting holder 22 longitudinally sliding in an upper compartment 15, a locking part 23 for locking the detecting holder 22 to a specific position in the upper compartment 15, a spring 24 for pressing the detecting holder 22 from a rear part toward a front part in the upper compartment 15, and a plate-shaped pressing plate 25 mounted between a back face of the detecting holder 22 and the spring 24, longitudinally slid, and opening the discharge hole 13a by moving the lower face closing the discharge hole 13a backward, when the detecting holder 22 is mounted on the predetermined position of the upper compartment 15. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ホルムアルデヒド検出器に係わり、より詳細には、室内のホルムアルデヒドを試薬により検出する検出構造を備えた空気清浄機に関する。
【０００２】
【従来の技術】
従来、空気清浄機は、例えば図４（Ａ）の外観斜視図に示す外観をしており、図４（Ｂ）はその断面図を示している。
この空気清浄機は、縦長状に形成された本体の前面に吸込口８１を、本体の上面に風向変更板を備えた吹出口８２を夫々設け、前面上部に、強弱運転等の運転状態と、室内の汚れ状態等を表示する表示部８３を設けている。本体は、図４（Ｂ）の断面図で示すように、吸込口８１の裏面に、吸込まれた空気に含まれる塵埃あるいは臭気を吸着する複数のフィルタ８４を設け、その背面に、清浄化された空気を吹出口８２から再び室内に送出する、ファンモータ８６により駆動される送風ファン８５を設けている。
ところで、室内には埃や花粉などの他に、家具や床、壁紙などから発せられる有害なガスが存在し、所謂シックハウスが近年問題化している。中でもホルムアルデヒドは人体に有害であり、これを簡単に検出する一つの方法として、以下の方法がある。
多孔質の検出紙に硫酸ヒドロキシルアミンと、硫酸に対して反応するメチルイエロを含浸させ、この検出紙にホルムアルデヒドを含む空気を通過させる。このとき化学反応が発生し、硫酸ヒドロキシルアミンが硫酸に変化する。この硫酸がメチルイエロと反応し、結果的にホルムアルデヒドの濃度が反応痕として表される。そして、この反応痕に発光ダイオードの光を照射し、反射光をフォトダイオードで読み取ることにより、濃度を電気的に検出する（特許文献１参照。）。
【０００３】
しかしながら、このような検出方法や装置は、主として検査装置として用いられており、安価で取り扱いが簡単なホルムアルデヒド検出装置を搭載した、一般家庭用の脱臭器や空気清浄器が望まれていた。
【０００４】
【特許文献１】
特開平７−２２９８８９号公報 （第２−３頁、第１図）
【０００５】
【発明が解決しようとする課題】
本発明は以上述べた問題点を解決し、安価で取り扱いが簡単なホルムアルデヒド検出装置を搭載した空気清浄機を提供することを目的としている。
【０００６】
【課題を解決するための手段】
本発明は、上記問題点を解決するため、本体の前面に吸込口を、上面に吹出口を設け、同本体内を吸入孔を穿設した仕切板により前後に区画するとともに、後部区画に前記吸入孔に臨むように送風ファンを設けると共に、前部区画を排出孔を穿設した第二仕切板により上下に区画し、下部区画に前記吸込口から流入する空気中の塵埃あるいは臭気を吸着する集塵フィルターを配設する一方、
上部区画に、本体前面に設けた取入口と前記第二仕切板に設けた排出孔とを結ぶ空気通路を設け、同空気通路中に、化学反応による色の変化で空気中の有害ガスを検出するガス検出装置を設ける。
【０００７】
また、前記ガス検出装置は、枠体に有害ガスを検出する試薬を含浸させた検知紙を貼着した検出部と、前面を開放して前記取入口を形成し、下面に前記第二仕切板の排出孔と対応する通風孔を備えた箱体からなり、前記上部区画内を前後に摺動する検出ホルダと、同検出ホルダを前記上部区画内の所定の位置に係止するための係止部と、前記上部区画内の後方より前方に向かって前記検出ホルダを押圧するバネと、前記検出ホルダの背面と前記バネとの間に配設されて前後に摺動し、前記検出ホルダが前記上部区画に装着された時に、前記排出孔を塞いでいた下面が後方に移動して前記排出孔を開放する板状の押圧板とからなる構造とする。
【０００８】
また、前記検出ホルダは、前記検出ホルダの上下面または側面に前記検出部を挿入するための挿通孔を備え、前記検出部が前記検出ホルダに着脱自在にしてなる構造とする。
【０００９】
また、前記係止部は、前記検出ホルダの上下面または側面に設けた係合穴と、前記上部区画に設けられて前記係合穴と対応し、ソレノイドの通電により前記係合穴との係止が解除される係止爪とからなる構造とする。
【００１０】
また、前記検出部は、検出紙の反応色と対応し、概略の前記ガス濃度を示す色見本を備えてなる構造とする。
【００１１】
【発明の実施の形態】
以下、図面に基づいて本発明による空気清浄機を詳細に説明する。
図１（Ａ）は本発明による空気清浄機の一実施例を示す外観斜視図であり、図１（Ｂ）はその断面図を示している。
この空気清浄機は、縦長状に形成された本体の前面に吸込口１を、本体の上面に風向変更板を備えた吹出口２を夫々設け、前面上部に、強弱運転等の運転状態と、室内の汚れ状態等を表示する表示部３を設けている。
本体は、図１（Ｂ）の断面図で示すように、本体内を吸入孔１０ａを穿設した仕切板１０により前後に区画するとともに、後部区画１１に吸入孔１０ａに臨むように送風ファン５と、これを駆動するファンモータ６とを備えている。
さらに、前部区画１２を第二仕切板１３により上下に区画し、下部区画１４の吸込口１の裏面に、吸込まれた空気に含まれる塵埃あるいは臭気を吸着する集塵フィルター４を配設する。また、上部区画１５には、化学反応による色の変化で空気中の有害ガスを検出するガス検出装置（図示せず）を設けている。
室内の空気は図１（Ｂ）の矢印で示すように、吸込口１から集塵フィルター４を通過し、清浄化された空気が吹出口２から再び室内に送出される。
【００１２】
本願の特徴であるホルムアルデヒドを検出するガス検出装置は、空気清浄機の上部区画１５に備えられている。この上部区画１５の詳細な要部断面図を図２に示す。
このガス検出装置２０は、枠体２１ａに有害ガスを検出する試薬を含浸させた検知紙２１ｂを貼着した検出部２１と、前面を開放して空気の取入口２２ａを形成し、下面に第二仕切板１３の排出孔１３ａと対応する通風孔２２ｂを備えた箱体からなり、上部区画１５内を前後に摺動する検出ホルダ２２と、同検出ホルダ２２を上部区画１５内の所定の位置に係止するための係止部２３と、上部区画１５内の後方より前方に向かって検出ホルダ２２を押圧するバネ２４と、検出ホルダ２２の背面とバネ２４との間に配設されて前後に摺動し、検出ホルダ２２が上部区画１５の所定の位置に装着された時、排出孔１３ａを塞いでいた下面が後方に移動して排出孔１３ａを開放する板状の押圧板２５とから構成されている。
この押圧板２５の下面と対向する面には、光センサ２６が埋設されており、検出ホルダ２２が所定の位置に摺動した時に、押圧板２５が光センサ２６の上方に位置することが検出される。
【００１３】
図３の斜視図に示すように検出ホルダ２２は、検出ホルダ２２の上面に検出部２１を挿入するための挿通孔２２ｃを備えており、検出部２１が検出ホルダ２２に着脱自在となる構造になっている。このため、挿通孔２２ｃと対応する検出ホルダ２２の内面には、検出部２１がスライドして挿入される溝２２ｄが設けられている。
【００１４】
検出部２１は、枠体２１ａに有害ガスであるホルムアルデヒドを検出する試薬を含浸させた検知紙２１ｂを貼着した構造となっている。
検知紙２１ｂは、多孔質の紙に硫酸ヒドロキシルアミンと、硫酸に対して反応するメチルイエロとを含浸させて作成されており、検知紙２１ｂを通過する空気内に含まれるホルムアルデヒドにより化学反応が発生し、硫酸ヒドロキシルアミンが硫酸に変化する。この硫酸がメチルイエロと反応し、ホルムアルデヒドの濃度が反応痕として表われる。
保存状態の検出部２１は、この反応を発生させないため、枠体２１ａの表および裏面に空気を遮断するフイルム２１ｃが張り付けられている。従って測定開始直前にこのフイルム２１ｃを剥がしてから、検出部２１を検出ホルダ２２の挿通孔２２ｃに挿入して装着する。
また、検出部２１は、検知紙２１ｂの反応色と対応して、ホルムアルデヒドのガス濃度を示す印刷された色見本２１ｄを検出部２１の前面脇に備えている。この例では、０〜０．０２５ｐｐｍ、０．０２５〜０．０５ｐｐｍ、０．０５〜０．０７５ｐｐｍ、０．０７５〜０．１ｐｐｍの４段階のガス濃度が印刷された色見本２１ｄと、測定後の検知紙２１ｂの反応色とを目視により比較することにより、概略の濃度を知ることができる。なお、印刷された色見本２１ｄには、上記４段階のガス濃度と対応して、２５、５０、７５、１００と表示している。
【００１５】
図２に示すように係止部２３は、検出ホルダ２２の下面に設けた係合穴２２ｅと、係合穴２２ｅと対応した係止爪２３ｂと、第二仕切板１３の上面に固定されたソレノイド２３ａと、ソレノイド２３ａと係止爪２３ｂとの間に配設されたスプリング２３ｃとで構成されている。
係止爪２３ｂの一端は軸支されており、他端はソレノイド２３ａの先端に軸支されている。従って係止爪２３ｂは、ソレノイド２３ａが非通電状態の時にスプリング２３ｃの押圧により、上方へ回動して係合穴２２ｅと嵌合し、ソレノイド２３ａが通電状態の時に下方に回動して係合穴２２ｅとの係止が解除される構造となっている。
【００１６】
以上の構成において、つぎにその動作を説明する。
図３に示すように、まず検出部２１のフイルム２１ｃを剥がし、検出ホルダ２２に装着する。そして図２に示すように、上部区画１５の前方から検出ホルダ２２を差し入れる。検出ホルダ２２が所定の位置に達すると、検出ホルダ２２が差し込まれる以前には点線に位置にあった押圧板２５が、検出ホルダ２２の背面に押されて図の位置まで後退する。同時に係止部２３の係止爪２３ｂと係合穴２２ｅとが係止状態となり、検出ホルダ２２は上部区画１５の内部に固定された状態となる。
【００１７】
押圧板２５が後退すると、押圧板２５が光センサ２６の上方に位置することが制御部（図示せず）で検出され、ホルムアルデヒドが検知紙２１ｂの試薬と十分に反応する所定時間、例えば５分間の間、送風ファン５を回転させる。なお、この時間は検出対象の空気の容量に反比例するため、送風ファン５の回転数を考慮して制御部が決定する。
検出ホルダ２２が上部区画１５の内部に固定された状態になると、前述のように押圧板２５が、図の位置まで後退している。従って、検出ホルダ２２の取入口２２ａから検出部２１の検知紙２１ｂ、検出ホルダ２２の通風孔２２ｂ、第二仕切板１３の排出孔１３ａまで、図２の矢印で示す検出対象空気の流れができる。検出済の空気は、矢印で示す清浄対象の空気の流れと合流し、吹出口２から再び室内に送出される。
【００１８】
所定時間が経過すると制御部は、ソレノイド２３ａを通電状態とし、係止部２３の係止を外す。すると、押圧板２５が検出ホルダ２２の背面を前方に押し出し、検出ホルダ２２を図２の点線で示す位置まで押し戻す。すると押圧板２５が第二仕切板１３の排出孔１３ａを塞いだ状態となり、検出対象空気の流れが遮断される。
また、この状態は検出ホルダ２２の上面の挿通孔２２ｃが上部区画１５から露出した状態であり、再度検査を行なう場合に、検出ホルダ２２を取り外すことなく、検出部２１を交換することができる。
このような構造により、検出ホルダを押し込む動作とガス検出用の空気通路の切換とを１つの動作で行なうことができる。また、検出ホルダの係止が解除された時に、検出ホルダの前面が所定の寸法だけ突出するため、検査の終了を目視で確認することができる。
また、検出ホルダの所定位置への固定と制御部が決定する所定時間での解除が簡単な構造で実現できる。
【００１９】
取り出した検出部２１は、測定後の検知紙２１ｂの反応色と色見本２１ｄとを目視により比較することにより、概略のホルムアルデヒドのガス濃度を簡単に知ることができる。
以上のような構造により、安価で取り扱いが簡単なホルムアルデヒド検出装置を搭載した空気清浄機とすることができる。
【００２０】
【発明の効果】
以上説明したように、本発明による空気清浄機によれば、請求項１に係わる発明は、上部区画に、前面より空気を吸入する取入口と空気を下部区画に排出する排出孔との空気通路中に、化学反応による色の変化で空気中の有害ガスを検出するガス検出装置を設けることにより、安価で取り扱いが簡単なホルムアルデヒド検出装置を搭載した空気清浄機とすることができる。
【００２１】
請求項２に係わる発明は、ガス検出装置を、枠体に有害ガスを検出する試薬を含浸させた検知紙を貼着した検出部と、前面を開放して取入口を形成し、下面に第二仕切板の排出孔と対応する通風孔を備えた箱体からなり、上部区画内を前後に摺動する検出ホルダと、同検出ホルダを上部区画内の所定の位置に係止するための係止部と、上部区画内の後方より前方に向かって検出ホルダを押圧するバネと、検出ホルダの背面とバネとの間に配設されて前後に摺動し、検出ホルダが上部区画に装着された時に、排出孔を塞いでいた下面が後方に移動して排出孔を開放する板状の押圧板とからなる構造とすることにより、
検出ホルダを押し込む動作とガス検出用の空気通路の切換とを１つの動作で行なうことができる。また、検出ホルダの係止が解除された時に、検出ホルダの前面が所定の寸法だけ突出するため、検査の終了を目視で確認することができる。
【００２２】
請求項３に係わる発明は、検出ホルダに、検出ホルダの上下面または側面に検出部を挿入するための挿通孔を備え、検出部が検出ホルダに着脱自在にしてなる構造により、検出ホルダを取り外すことなく、検出部を交換することができる。
【００２３】
請求項４に係わる発明は、係止部を、検出ホルダの上下面または側面に設けた係合穴と、上部区画に設けられて係合穴と対応し、ソレノイドの通電により係合穴との係止が解除される係止爪とで構成することにより、検出ホルダの所定位置への固定と制御部が決定する所定時間での解除が簡単な構造で実現できる。
【００２４】
請求項５に係わる発明は、検出部に、検出紙の反応色と対応し、概略のガス濃度を示す色見本を備えることにより、ホルムアルデヒドのガス濃度を簡単に知ることができる。
【００２５】
【図面の簡単な説明】
【図１】本発明による空気清浄機の一実施例を示す（Ａ）は外観斜視図であり、（Ｂ）はその断面図である。
【図２】本発明による空気清浄機の一実施例を示す要部断面図である。
【図３】本発明による検出部と検出ホルダを示す斜視図である。
【図４】従来の空気清浄機を示す（Ａ）は外観斜視図であり、（Ｂ）はその断面図である。
【符号の説明】
１ 吸込口
２ 吹出口
３ 表示部
４ 集塵フィルター
５ 送風ファン
６ ファンモータ
１０ 仕切板
１０ａ 吸入孔
１１ 後部区画
１２ 前部区画
１３ 第二仕切板
１３ａ 排出孔
１４ 下部区画
１５ 上部区画
２０ ガス検出装置
２１ 検出部
２１ａ 枠体
２１ｂ 検知紙
２１ｃ フイルム
２１ｄ 色見本
２２ 検出ホルダ
２２ａ 取入口
２２ｂ 通風孔
２２ｃ 挿通孔
２２ｄ 溝
２２ｅ 係合穴
２３ 係止部
２３ａ ソレノイド
２３ｂ 係止爪
２３ｃ スプリング
２４ バネ
２５ 押圧板
２６ 光センサ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a formaldehyde detector, and more particularly, to an air purifier having a detection structure for detecting indoor formaldehyde with a reagent.
[0002]
[Prior art]
Conventionally, an air purifier has an appearance shown in, for example, an external perspective view of FIG. 4A, and FIG. 4B shows a cross-sectional view thereof.
In this air purifier, a suction port 81 is provided on a front surface of a vertically elongated main body, and an outlet 82 having a wind direction changing plate is provided on an upper surface of the main body. A display unit 83 for displaying the state of dirt in the room is provided. As shown in the sectional view of FIG. 4B, the main body is provided with a plurality of filters 84 for adsorbing dust or odor contained in the sucked air on the back surface of the suction port 81, and the back surface is cleaned. A blower fan 85 driven by a fan motor 86 is provided for sending out the blown air from the outlet 82 into the room again.
By the way, besides dust and pollen, harmful gas emitted from furniture, floors, wallpaper, etc. exists in the room, and so-called sick houses have recently become a problem. Among them, formaldehyde is harmful to the human body, and one method for easily detecting this is as follows.
The porous detection paper is impregnated with hydroxylamine sulfate and methyl yellow which reacts with sulfuric acid, and air containing formaldehyde is passed through the detection paper. At this time, a chemical reaction occurs, and hydroxylamine sulfate is changed to sulfuric acid. This sulfuric acid reacts with the methyl yellow, and as a result, the concentration of formaldehyde is expressed as a reaction mark. Then, the light of a light emitting diode is applied to the reaction mark, and the reflected light is read by a photodiode to electrically detect the concentration (see Patent Document 1).
[0003]
However, such detection methods and devices are mainly used as inspection devices, and there has been a demand for general household deodorizers and air purifiers equipped with inexpensive and easy-to-handle formaldehyde detection devices.
[0004]
[Patent Document 1]
JP-A-7-229889 (page 2-3, FIG. 1)
[0005]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-mentioned problems and to provide an air purifier equipped with a formaldehyde detector that is inexpensive and easy to handle.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a suction port on the front face of the main body, an outlet on the top face, and partitions the inside of the main body forward and backward by a partition plate having a suction hole, and the rear section. A blower fan is provided so as to face the suction hole, and the front section is vertically divided by a second partition plate having a discharge hole, and the lower section adsorbs dust or odor in the air flowing from the suction port. While installing a dust collection filter,
The upper section is provided with an air passage connecting the inlet provided in the front of the main body and the discharge hole provided in the second partition plate, and in the same air passage, a harmful gas in the air is detected by a color change due to a chemical reaction. A gas detection device is provided.
[0007]
Further, the gas detection device has a detection unit in which a detection paper impregnated with a reagent for detecting a harmful gas is adhered to a frame, and a front surface is opened to form the inlet, and the second partition plate is formed on a lower surface. A detection holder, which is formed of a box having ventilation holes corresponding to the discharge holes, and which slides back and forth in the upper section, and a lock for locking the detection holder at a predetermined position in the upper section. Part, a spring that presses the detection holder forward from the rear in the upper section, and is disposed between the back surface of the detection holder and the spring and slides back and forth, and the detection holder is When mounted on the upper section, the lower surface closing the discharge hole moves rearward to have a plate-shaped pressing plate that opens the discharge hole.
[0008]
Further, the detection holder has a structure in which insertion holes for inserting the detection unit are provided on upper and lower surfaces or side surfaces of the detection holder, and the detection unit is detachable from the detection holder.
[0009]
Further, the engaging portion corresponds to the engaging hole provided on the upper or lower surface or the side surface of the detection holder, and the engaging hole provided in the upper section, and is engaged with the engaging hole by energizing a solenoid. The locking pawl is released from the stop.
[0010]
Further, the detection section has a structure including a color sample corresponding to the reaction color of the detection paper and indicating the approximate gas concentration.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an air purifier according to the present invention will be described in detail with reference to the drawings.
FIG. 1A is an external perspective view showing an embodiment of an air purifier according to the present invention, and FIG. 1B is a sectional view thereof.
In this air purifier, a suction port 1 is provided on a front surface of a vertically long main body, and an air outlet 2 provided with a wind direction changing plate is provided on an upper surface of the main body. A display unit 3 for displaying the state of dirt in the room and the like is provided.
As shown in the cross-sectional view of FIG. 1B, the main body is divided into front and rear by a partition plate 10 having a suction hole 10a formed therein, and a blower fan 5 is formed in a rear section 11 so as to face the suction hole 10a. And a fan motor 6 for driving the same.
Further, the front section 12 is vertically divided by a second partition plate 13, and a dust collection filter 4 for adsorbing dust or odor contained in the sucked air is disposed on the back surface of the suction port 1 of the lower section 14. . Further, the upper section 15 is provided with a gas detection device (not shown) for detecting a harmful gas in the air by a color change due to a chemical reaction.
As shown by the arrow in FIG. 1B, the air in the room passes through the dust collection filter 4 from the suction port 1 and the purified air is sent out again from the air outlet 2 into the room.
[0012]
The gas detector for detecting formaldehyde, which is a feature of the present invention, is provided in the upper section 15 of the air purifier. FIG. 2 is a detailed cross-sectional view of a main part of the upper section 15.
The gas detection device 20 has a detection unit 21 in which a detection paper 21b impregnated with a reagent for detecting a harmful gas is adhered to a frame 21a, an air inlet 22a is formed by opening a front surface, and a second surface is formed on a lower surface. It consists of a box provided with a vent hole 22b corresponding to the discharge hole 13a of the two partition plate 13, and a detection holder 22 that slides back and forth in the upper section 15, and the detection holder 22 is positioned at a predetermined position in the upper section 15. Locking portion 23, a spring 24 for pressing the detection holder 22 forward from the rear in the upper section 15, and a spring 24 disposed between the back surface of the detection holder 22 and the spring 24. When the detection holder 22 is mounted at a predetermined position of the upper section 15, the lower surface that has closed the discharge hole 13 a moves rearward to release the discharge hole 13 a from the plate-shaped pressing plate 25. It is configured.
An optical sensor 26 is buried in a surface facing the lower surface of the pressing plate 25. When the detection holder 22 slides to a predetermined position, it is detected that the pressing plate 25 is located above the optical sensor 26. Is done.
[0013]
As shown in the perspective view of FIG. 3, the detection holder 22 has an insertion hole 22 c for inserting the detection unit 21 on the upper surface of the detection holder 22, so that the detection unit 21 can be attached to and detached from the detection holder 22. Has become. Therefore, a groove 22d into which the detection unit 21 is slid and inserted is provided on the inner surface of the detection holder 22 corresponding to the insertion hole 22c.
[0014]
The detection unit 21 has a structure in which a detection paper 21b impregnated with a reagent for detecting formaldehyde, which is a harmful gas, is adhered to a frame 21a.
The detection paper 21b is made by impregnating a porous paper with hydroxylamine sulfate and methyl yellow which reacts with sulfuric acid, and a chemical reaction occurs due to formaldehyde contained in the air passing through the detection paper 21b. Then, hydroxylamine sulfate is converted to sulfuric acid. This sulfuric acid reacts with methyl yellow, and the concentration of formaldehyde appears as a reaction mark.
In order to prevent this reaction from occurring in the storage unit 21 in the stored state, a film 21c for blocking air is attached to the front and back surfaces of the frame 21a. Therefore, immediately before the measurement is started, the film 21c is peeled off, and then the detection unit 21 is inserted into the insertion hole 22c of the detection holder 22 and mounted.
In addition, the detection unit 21 includes a printed color sample 21d indicating the formaldehyde gas concentration corresponding to the reaction color of the detection paper 21b on the front side of the detection unit 21. In this example, a color sample 21d on which four levels of gas concentrations of 0 to 0.025 ppm, 0.025 to 0.05 ppm, 0.05 to 0.075 ppm, and 0.075 to 0.1 ppm are printed, and By visually comparing the reaction color of the detection paper 21b with the color of the detection paper 21b, an approximate density can be obtained. It should be noted that the printed color sample 21d is displayed as 25, 50, 75, and 100 corresponding to the four levels of gas concentrations.
[0015]
As shown in FIG. 2, the locking portion 23 is fixed to an engagement hole 22 e provided on the lower surface of the detection holder 22, a locking claw 23 b corresponding to the engagement hole 22 e, and an upper surface of the second partition plate 13. It comprises a solenoid 23a, and a spring 23c disposed between the solenoid 23a and the locking claw 23b.
One end of the locking claw 23b is pivotally supported, and the other end is pivotally supported by the tip of the solenoid 23a. Therefore, when the solenoid 23a is in the non-energized state, the locking claw 23b is rotated upward by the pressing of the spring 23c and fitted into the engagement hole 22e, and is rotated downward when the solenoid 23a is in the energized state. The engagement with the mating hole 22e is released.
[0016]
Next, the operation of the above configuration will be described.
As shown in FIG. 3, first, the film 21 c of the detection unit 21 is peeled off, and the film 21 c is mounted on the detection holder 22. Then, as shown in FIG. 2, the detection holder 22 is inserted from the front of the upper section 15. When the detection holder 22 reaches a predetermined position, the pressing plate 25 located at the dotted line before the detection holder 22 is inserted is pushed by the back surface of the detection holder 22 and retreats to the position shown in the drawing. At the same time, the locking claw 23b of the locking portion 23 and the engagement hole 22e are locked, and the detection holder 22 is fixed inside the upper section 15.
[0017]
When the pressing plate 25 retreats, the control unit (not shown) detects that the pressing plate 25 is located above the optical sensor 26, and a predetermined time, for example, 5 minutes, at which the formaldehyde sufficiently reacts with the reagent of the detection paper 21b. During this time, the blower fan 5 is rotated. Since this time is inversely proportional to the capacity of the air to be detected, the control unit determines the rotation speed of the blower fan 5 in consideration.
When the detection holder 22 is fixed inside the upper section 15, the pressing plate 25 is retracted to the position shown in the drawing as described above. Accordingly, the air to be detected indicated by the arrow in FIG. 2 can flow from the inlet 22a of the detection holder 22 to the detection paper 21b of the detection unit 21, the ventilation hole 22b of the detection holder 22, and the discharge hole 13a of the second partition plate 13. . The detected air merges with the flow of the air to be cleaned indicated by the arrow, and is sent out again from the outlet 2 into the room.
[0018]
After a lapse of a predetermined time, the control unit turns on the solenoid 23a and releases the locking of the locking unit 23. Then, the pressing plate 25 pushes the back surface of the detection holder 22 forward, and pushes the detection holder 22 back to the position shown by the dotted line in FIG. Then, the pressing plate 25 is in a state of closing the discharge hole 13a of the second partition plate 13, and the flow of the air to be detected is cut off.
In this state, the insertion hole 22c on the upper surface of the detection holder 22 is exposed from the upper section 15. When the inspection is performed again, the detection unit 21 can be replaced without removing the detection holder 22.
With such a structure, the operation of pushing the detection holder and the switching of the gas detection air passage can be performed by one operation. In addition, when the engagement of the detection holder is released, the front surface of the detection holder projects by a predetermined size, so that the end of the inspection can be visually confirmed.
Further, the detection holder can be fixed to a predetermined position and released in a predetermined time determined by the control unit with a simple structure.
[0019]
The removed detection unit 21 can easily know the approximate gas concentration of formaldehyde by visually comparing the reaction color of the detection paper 21b after measurement with the color sample 21d.
With the above structure, it is possible to provide an air purifier equipped with a formaldehyde detector that is inexpensive and easy to handle.
[0020]
【The invention's effect】
As described above, according to the air purifier of the present invention, the invention according to claim 1 is directed to an air passage between an intake for sucking air from a front surface and an exhaust hole for discharging air to a lower compartment in an upper compartment. By providing a gas detector for detecting harmful gas in the air based on a change in color due to a chemical reaction, an air purifier equipped with a formaldehyde detector that is inexpensive and easy to handle can be provided.
[0021]
The invention according to claim 2 is a gas detection device, comprising: a detection unit in which a detection paper impregnated with a reagent for detecting a harmful gas is adhered to a frame; a front surface opened to form an intake; A detection holder, which is formed of a box body having ventilation holes corresponding to the discharge holes of the two partition plates, and slides back and forth in the upper compartment, and a member for locking the detection holder at a predetermined position in the upper compartment. A stop portion, a spring that presses the detection holder forward from the rear in the upper compartment, and a spring disposed between the rear surface of the detection holder and the spring and slid back and forth, and the detection holder is attached to the upper compartment. At the time, by having a structure consisting of a plate-shaped pressing plate that opens the discharge hole by moving the lower surface that closed the discharge hole backwards,
The operation of pushing the detection holder and the switching of the gas detection air passage can be performed by one operation. In addition, when the engagement of the detection holder is released, the front surface of the detection holder projects by a predetermined size, so that the end of the inspection can be visually confirmed.
[0022]
According to a third aspect of the present invention, the detection holder is provided with insertion holes for inserting the detection unit on the upper and lower surfaces or side surfaces of the detection holder, and the detection unit is detached from the detection holder by a structure in which the detection unit is detachable from the detection holder. The detector can be replaced without the need.
[0023]
According to a fourth aspect of the present invention, the engaging portion corresponds to an engaging hole provided on the upper or lower surface or a side surface of the detection holder and an engaging hole provided in the upper section, and the engaging portion is connected to the engaging hole by energizing the solenoid. By using the locking claw for releasing the locking, the detection holder can be fixed to a predetermined position and released in a predetermined time determined by the control unit with a simple structure.
[0024]
According to the fifth aspect of the present invention, by providing the detection unit with a color sample corresponding to the reaction color of the detection paper and indicating the approximate gas concentration, the gas concentration of formaldehyde can be easily known.
[0025]
[Brief description of the drawings]
FIG. 1A is an external perspective view showing an embodiment of an air purifier according to the present invention, and FIG. 1B is a sectional view thereof.
FIG. 2 is a sectional view of a main part showing an embodiment of the air purifier according to the present invention.
FIG. 3 is a perspective view showing a detection unit and a detection holder according to the present invention.
4A is an external perspective view showing a conventional air purifier, and FIG. 4B is a cross-sectional view thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Display part 4 Dust collection filter 5 Blower fan 6 Fan motor 10 Partition plate 10a Suction hole 11 Rear section 12 Front section 13 Second partition 13a Exhaust hole 14 Lower section 15 Upper section 20 Gas detector Reference Signs List 21 Detecting portion 21a Frame 21b Detecting paper 21c Film 21d Color sample 22 Detection holder 22a Inlet 22b Vent hole 22c Insertion hole 22d Groove 22e Engagement hole 23 Locking portion 23a Solenoid 23b Locking claw 23c Spring 24 Spring 25 Press plate 26 Optical sensor

Claims (5)

本体の前面に吸込口を、上面に吹出口を設け、同本体内を吸入孔を穿設した仕切板により前後に区画するとともに、後部区画に前記吸入孔に臨むように送風ファンを設けると共に、前部区画を排出孔を穿設した第二仕切板により上下に区画し、下部区画に前記吸込口から流入する空気中の塵埃あるいは臭気を吸着する集塵フィルターを配設する一方、
上部区画に、本体前面に設けた取入口と前記第二仕切板に設けた排出孔とを結ぶ空気通路を設け、同空気通路中に、化学反応による色の変化で空気中の有害ガスを検出するガス検出装置を設けてなることを特徴とする空気清浄機。A suction port is provided on the front surface of the main body, an air outlet is provided on the upper surface, the inside of the main body is divided into front and rear by a partition plate having a suction hole, and a blower fan is provided in the rear section so as to face the suction hole, The front section is vertically divided by a second partition plate having a discharge hole, and a dust collection filter for adsorbing dust or odor in the air flowing from the suction port is disposed in the lower section,
The upper section is provided with an air passage connecting the inlet provided in the front of the main body and the discharge hole provided in the second partition plate, and in the same air passage, a harmful gas in the air is detected by a color change due to a chemical reaction. An air purifier characterized by comprising a gas detector that performs the following. 前記ガス検出装置は、枠体に有害ガスを検出する試薬を含浸させた検知紙を貼着した検出部と、前面を開放して前記取入口を形成し、下面に前記第二仕切板の排出孔と対応する通風孔を備えた箱体からなり、前記上部区画内を前後に摺動する検出ホルダと、同検出ホルダを前記上部区画内の所定の位置に係止するための係止部と、前記上部区画内の後方より前方に向かって前記検出ホルダを押圧するバネと、前記検出ホルダの背面と前記バネとの間に配設されて前後に摺動し、前記検出ホルダが前記上部区画に装着された時に、前記排出孔を塞いでいた下面が後方に移動して前記排出孔を開放する板状の押圧板とからなることを特徴とする請求項１記載の空気清浄機。The gas detection device has a detection unit in which a detection paper impregnated with a reagent for detecting a harmful gas is adhered to a frame, and a front surface is opened to form the inlet, and a discharge surface of the second partition plate is formed on a lower surface. A detection holder, which is formed of a box having ventilation holes corresponding to the holes and slides back and forth in the upper section, and a locking portion for locking the detection holder at a predetermined position in the upper section. A spring that presses the detection holder forward from rear in the upper section, and is disposed between the back of the detection holder and the spring and slides back and forth, and the detection holder is moved in the upper section. 2. The air purifier according to claim 1, wherein the lower surface of the air purifier comprises a plate-like pressing plate which moves rearward to open the discharge hole when the air purifier is mounted on the air purifier. 前記検出ホルダは、前記検出ホルダの上下面または側面に前記検出部を挿入するための挿通孔を備え、前記検出部が前記検出ホルダに着脱自在にしてなることを特徴とする請求項２記載の空気清浄機。The said detection holder is provided with the insertion hole for inserting the said detection part in the upper and lower surfaces or the side surface of the said detection holder, The said detection part becomes detachable with respect to the said detection holder, The characterized by the above-mentioned. Air cleaner. 前記係止部は、前記検出ホルダの上下面または側面に設けた係合穴と、前記上部区画に設けられて前記係合穴と対応し、ソレノイドの通電により前記係合穴との係止が解除される係止爪とからなることを特徴とする請求項１記載の空気清浄機。The engagement portion is provided with an engagement hole provided on an upper or lower surface or a side surface of the detection holder, and is provided in the upper section and corresponds to the engagement hole, and the engagement with the engagement hole is performed by energizing a solenoid. The air purifier according to claim 1, comprising a locking claw to be released. 前記検出部は、検出紙の反応色と対応し、概略の前記ガス濃度を示す色見本を備えてなることを特徴とする請求項１記載の空気清浄機。The air purifier according to claim 1, wherein the detection unit includes a color sample corresponding to a reaction color of the detection paper and indicating the approximate gas concentration.
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JP2010091470A (en) * 2008-10-09 2010-04-22 Nippon Telegr & Teleph Corp <Ntt> System and method of measuring gas concentration by electronic image colorimetric method
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JP2009281911A (en) * 2008-05-23 2009-12-03 Nippon Telegr & Teleph Corp <Ntt> Analyzing apparatus
JP2010091470A (en) * 2008-10-09 2010-04-22 Nippon Telegr & Teleph Corp <Ntt> System and method of measuring gas concentration by electronic image colorimetric method
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