JPH0371050A - Odor detector - Google Patents

Odor detector

Info

Publication number
JPH0371050A
JPH0371050A JP1205818A JP20581889A JPH0371050A JP H0371050 A JPH0371050 A JP H0371050A JP 1205818 A JP1205818 A JP 1205818A JP 20581889 A JP20581889 A JP 20581889A JP H0371050 A JPH0371050 A JP H0371050A
Authority
JP
Japan
Prior art keywords
ozone
air
value
odor
output value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1205818A
Other languages
Japanese (ja)
Other versions
JP2818869B2 (en
Inventor
Yoshiaki Okayama
義昭 岡山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nohmi Bosai Ltd
Original Assignee
Nohmi Bosai Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nohmi Bosai Ltd filed Critical Nohmi Bosai Ltd
Priority to JP1205818A priority Critical patent/JP2818869B2/en
Publication of JPH0371050A publication Critical patent/JPH0371050A/en
Application granted granted Critical
Publication of JP2818869B2 publication Critical patent/JP2818869B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

PURPOSE:To easily make the element part odorless and to surely discriminate abnormality by setting a threshold value with the output of the element part in the ozone current from an ozone supply part as a reference and discriminating abnormality. CONSTITUTION:The air to be monitored is sucked into an air pipe 2 by a suction device 1, and the amt. of an odor in the circulating air is detected by the element part 3. If the element part 3 is exposed in the odorous air current, the odorous molecule is deposited, and the output value is deviated from zero. Accordingly, the output value has to be periodically calibrated to the zero value. For the calibration, and ozone supply part 4 provided in the air pipe 2 on the primary side of the element part 3 is started to mix ozone into the air current. Consequently, the air current coming to the element part 3 is made odorless by the action of ozone, and further the surface of the element is also cleaned by the ozone in the air current. Consequently, the output value from the element part 3 is precisely set at the zero value when the air is odorless. The control part 5 controls these action with microcomputer, sets the prescribed threshold value and discriminates the abnormalities.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、監視区域の空気をサンプリングして臭いを検
出する臭い検出装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an odor detection device that samples air in a monitoring area to detect odor.

〔従来技術〕[Prior art]

従来、空気中の臭いを検出するための装置は、使用して
いる間に、検出素子の零値の出力、すなわち臭いが全く
ない状態での出力が変化して、正確な臭いの量による出
力が得られなくなる。
Conventionally, devices for detecting odors in the air change the zero-value output of the detection element, that is, the output when there is no odor, while in use, and the output changes depending on the exact amount of odor. will not be obtained.

従って定期的に臭いが全くない状態、例えば活性炭によ
り臭いを取り除いたり、ボンベ等がら清浄な空気を導入
したりして、検出素子の零値の出力を較正していた。
Therefore, the zero value output of the detection element has been calibrated periodically by removing the odor using activated carbon or by introducing clean air from a cylinder or the like.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の零値の出力較正のための状態を作るには、所定の
検出素子較正用の箱に入れるなどの場所を必要とし、活
性炭を使用する場合は、脱臭力の低下時に交換する必要
があり、また、空気ボンベを使用する場合は、ボンベの
空気が乾燥しているので、素子の出力が安定するまで時
間がかかるという欠点がある。
To create the conditions for conventional zero value output calibration, a place such as placing it in a predetermined detection element calibration box is required, and if activated carbon is used, it must be replaced when the deodorizing power decreases. Furthermore, when using an air cylinder, there is a drawback that it takes time until the output of the element becomes stable because the air in the cylinder is dry.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は、オゾンに臭いを分解する作用があることに着
目し、オゾンを用いて臭いの量を正確に検出することを
目的として、監視区域の空気をサンプリングして異常な
臭いを検出する臭い検出装置において、空気中の臭いを
検出する素子部と、オゾンを供給するオゾン供給部と、
素子部に空気を送る吸引部と、前記各部を制御する制御
部を有し、制御部は、マイクロコンピュータを備え、素
子部からの出力値から異常な臭いを判別する異常判別手
段を有するものであり、異常判別手段は、オゾン供給部
からのオゾン気流中での素子部の出力を基準として、所
定の閾値を設定し、素子部の空気中での出力が閾値を超
えるときに異常と判別するものである。
The present invention focuses on the fact that ozone has the effect of decomposing odors, and aims to accurately detect the amount of odors using ozone. The detection device includes an element section that detects odor in the air, an ozone supply section that supplies ozone,
It has a suction section that sends air to the element section, and a control section that controls each of the above-mentioned sections, and the control section is equipped with a microcomputer and has abnormality discrimination means for discriminating an abnormal odor from the output value from the element section. Yes, the abnormality determination means sets a predetermined threshold value based on the output of the element part in the ozone airflow from the ozone supply part, and determines that there is an abnormality when the output of the element part in the air exceeds the threshold value. It is something.

また、異常判別手段は、オゾン供給部の定期的な作動に
より、サンプリングされた空気中にオゾンが定期的に混
入され、素子部のオゾンなしでの出力とオゾン有りでの
出力との差が所定の値を超えるときに異常と判別するも
のである。
In addition, the abnormality determination means is such that ozone is periodically mixed into the sampled air due to the regular operation of the ozone supply section, and the difference between the output of the element section without ozone and the output with ozone is determined by a predetermined difference. It is determined that there is an abnormality when the value exceeds the value.

〔作 用〕[For production]

臭いの全くない状態をオゾンを使って作成するので、活
性炭を用いる場合のように特別な室を必要とせず、また
交換する必要がない。清浄な空気のボンベを使用する場
合に比べても、オゾンを使う場合は、測定気流中にオゾ
ンを混入させるので、臭い監視状態と同じ条件で零値較
正が行える。
Since ozone is used to create a completely odor-free state, there is no need for a special chamber or replacement, unlike when activated carbon is used. Compared to using a clean air cylinder, when using ozone, ozone is mixed into the measured airflow, so zero value calibration can be performed under the same conditions as the odor monitoring state.

〔実施例〕〔Example〕

以下に本発明による一実施例を図面により説明する。第
1図は、本発明を実施するための構成を示す一実施例で
あり、1は、ポンプ等の吸引装置、2は、通気管、3は
、臭いを検出する素子部、4は、通気管2内の気流にオ
ゾンを混入させるオゾン供給部、5は、素子部3および
オゾン供給部4等を制御するマイクロコンピュータを有
する制御部である。素子部3は、例えば白金線を用いる
熱線抵抗式等の臭い検出素子であり、臭いの濃度により
、抵抗値が変化する。
An embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a configuration for carrying out the present invention, in which 1 is a suction device such as a pump, 2 is a ventilation pipe, 3 is an element for detecting odor, and 4 is a ventilation device. The ozone supply unit 5 that mixes ozone into the airflow in the trachea 2 is a control unit that includes a microcomputer that controls the element unit 3, the ozone supply unit 4, and the like. The element part 3 is an odor detection element such as a hot wire resistance type using a platinum wire, and its resistance value changes depending on the odor concentration.

オゾン供給部4は、例えば無声放電オゾン発生器と同様
のものであるが、他にボンベ等を利用したオゾン導入装
置、または外部からオゾンを吹き込んでもよい。制御部
5は、臭いの異常を判断し、図示しない警報部に信号を
送り、また臭いの状態を表示するような図示しない表示
部も制御する。
The ozone supply unit 4 is, for example, similar to a silent discharge ozone generator, but it may also be an ozone introducing device using a cylinder or the like, or ozone may be blown in from the outside. The control unit 5 determines whether the odor is abnormal, sends a signal to an alarm unit (not shown), and also controls a display unit (not shown) that displays the state of the odor.

上記構成の動作について説明すると、監視される各区域
において、または各区域からの空気が吸引装置1により
、通気管2へ吸い込まれている。その途中に素子部3が
備えられてlJ)で、流通する空気中の臭いの量を検出
している。素子部3を臭いのある気流中に晒しておくと
、検出素子表面に臭い分子が付着して、零値の出力値、
すなわち臭いのない状態での出力値が変化するので、正
確な臭いによる出力が得られなくなる。従って定期的に
零値の出力値を較正する必要がある。零値の出力値を較
正する場合は、通気管2内の素子部3の一次側に設けら
れているオゾン供給部4を起動させて、通気管2を通る
気流中にオゾンを混入させる。すると素子部3へ来る気
流は、オゾンの作用により臭いのない状態となり、更に
気流中に混在するオゾンが素子表面に付着している臭い
分子まで分解し、素子表面の浄化まで行う。従って素子
部3からの出力は、臭いがない状態であるとともに、清
浄な表面での出力が得られ、正確に零値の出力値が設定
される。以上の動作は、制御部5により自動的に行うこ
とも可能で零値の出力値の記憶や臭いによる出力の算出
等を制御部5が行っている。
To explain the operation of the above configuration, air in or from each area to be monitored is sucked into the ventilation pipe 2 by the suction device 1. An element section 3 is provided in the middle of the flow, and detects the amount of odor in the circulating air. If the element part 3 is exposed to a smelly airflow, odor molecules will adhere to the surface of the detection element, resulting in a zero output value,
In other words, since the output value in the absence of odor changes, accurate odor output cannot be obtained. Therefore, it is necessary to periodically calibrate the zero value output value. When calibrating the zero output value, the ozone supply unit 4 provided on the primary side of the element section 3 in the ventilation pipe 2 is activated to mix ozone into the airflow passing through the ventilation pipe 2. Then, the airflow coming to the element section 3 becomes odorless due to the action of ozone, and furthermore, the ozone mixed in the airflow decomposes odor molecules attached to the element surface, purifying the element surface. Therefore, the output from the element section 3 is odorless, and the output is obtained from a clean surface, and an output value of zero is accurately set. The above operations can also be performed automatically by the control section 5, and the control section 5 stores the zero output value and calculates the output based on odor.

制御部5の構成と動作を示すフローチャートとブロック
回路図を第2図と第3図から説明すると、MPUは、マ
イクロプロセッサ、ROM1ば、制御部5の動作に関す
るプT1グラム記憶領域、ROM2は、後述する各種の
定数の記憶領域、RAM1は、作業用領域、RAM2は
、後述する各数値の記憶領域、IFI、  丁F2IF
5およびIF4は、インターフェース、(:Sは、素子
部3、OPは、オゾン供給部4、CLは、時計、DPは
、CRT等の表示部である。
A flowchart and a block circuit diagram showing the configuration and operation of the control unit 5 will be explained with reference to FIGS. RAM1 is a storage area for various constants, which will be described later, is a work area, and RAM2 is a storage area for each numerical value, which will be described later.
5 and IF4 are an interface, (:S is an element section 3, OP is an ozone supply section 4, CL is a clock, and DP is a display section such as a CRT.

制御部5は、通常、素子部3からのセンザ出力SLVを
、例えば、閾値Bと比較して異常を表示したり、臭いの
強さS L、 V −S L、 V oを表示させたり
している(ステップ202.204.、205゜206
)。読み込んだ時刻が較正時刻であると(ステップ20
1.203のY)、また、そのときに所定量の出力値へ
を検出していない場合は(ステップ207のNL零値の
出力値S L V 、の較正を開始する。その場合、制
御部5は、まずオゾン供給部4を始動させて臭いのない
環境を作り出す(ステップ208.209)。充分零値
の出力が落ちついてからセンザ出力を読み込み、零値の
出力値5LVOとしてそこへ所定値り、Kを加え、所定
量の出力値Aど閾値Bを設定してオゾン供給部4を停止
させる(ステップ2OL 211.、21.2)。
The control unit 5 usually compares the sensor output SLV from the element unit 3 with, for example, a threshold value B and displays an abnormality, or displays the odor strength S L, V - S L, Vo. (Steps 202, 204, 205, 206
). If the read time is the calibration time (step 20
1. Y in 203), and if the predetermined output value is not detected at that time (step 207, start calibration of the output value S L V of the NL zero value). In that case, the control unit Step 5 first starts the ozone supply unit 4 to create an odor-free environment (steps 208 and 209).After the zero value output has settled down sufficiently, the sensor output is read and a predetermined value is set there as the zero value output value 5LVO. , K is added, a predetermined amount of output value A and threshold value B are set, and the ozone supply section 4 is stopped (step 2OL 211., 21.2).

所定量の出力値Aは、オゾンで零値の出力値S I= 
V oを設定しにくい量の臭いが発生している場合であ
り、従って所定量の出力値A以」二のセンサ出力SLV
が得られている場合は、零値の出力値SLV、の較正を
行わずに監視状態を続ける(ステップ207のY)。こ
こで所定量の出力値へを閾値Bより小さくしておくこと
により、閾値を超えている場合は零値の出力値SLV。
The output value A of the predetermined amount is the zero value output value S I=
This is a case where an amount of odor is generated that makes it difficult to set Vo, and therefore the sensor output SLV is less than the predetermined output value A.
If the zero value output value SLV is obtained, the monitoring state is continued without calibrating the zero value output value SLV (Y in step 207). Here, by setting the output value to a predetermined amount smaller than the threshold value B, the output value SLV becomes zero when the threshold value is exceeded.

の較正を行わずに監視状態を続けることが可能となる。It becomes possible to continue the monitoring state without performing calibration.

上記の動作は、素子部3の出力値が閾値を超えたときに
異常と判別する場合であり、以下にその他の異常判別手
段を用いる場合の動作について第4図に示すフローチャ
ートにより説明する。制御部5は、通常、空気中でのセ
ンザ出力SLV、を読み込んだ後(ステップ403)、
オゾン供給部4を始動させてオゾン混入気流をしばらく
発生させて(ステップ404.405)、オゾン混入気
流中でのセンサ出力s t、 v 2を読み込む(ステ
ップ406)。両出力を比較して所定の閾値Xよりも差
が大きい場合に異常と判別する(ステップ408のY、
 409)。オゾン供給部4を停止してしばらくしてか
ら(ステップ4.0?、 4.1.OL始めに戻ってセ
ンザ出力S L V 、を読み込む。通常はこれを繰り
返して監視状態を続けるが、読み込んだ時刻Tが較正時
刻になると(ステップ4.01.4.02のY)、素子
部3の浄化状態に入り (ステップ41.2.413.
414.41.5Lオゾン供給部4の動作により、素子
表面を浄化する。すなわち監視状態でのオゾン供給部4
の動作では、常に素子表面を完全に浄化していないので
、定期的に浄化を行う。従って浄化状態でのオゾン供給
時の待ち時間T2は、監視状態でのオゾン供給時の待ち
時間T、よりも充分長くしておく。また、この動作での
オゾン供給時の待ち時間は(ステップ410.415)
、監視状態でのオゾン供給時の待ち時間T1と同じであ
るが、オゾン供給時間の方を長くするなど異なる時間で
もよい。両センサ出力の差が閾値Xを超えない場合(ス
テップ408のNLセンサ出力5LV2を所定値Yと比
較して超える場合には異常を表示しくステップ416の
Y、 417)、超えない場合は異常の表示を解除する
(ステップ416のN、 4.18)。すなわち異常が
表示されていると、素子部3が汚染されているような不
具合が生じているので、洗浄したり、取り換えたりする
必要がある。
The above operation is for determining an abnormality when the output value of the element section 3 exceeds a threshold value, and the operation when using other abnormality determining means will be described below with reference to the flowchart shown in FIG. 4. The control unit 5 normally reads the sensor output SLV in air (step 403), and then
The ozone supply unit 4 is started to generate an ozone-containing airflow for a while (steps 404 and 405), and the sensor outputs s t, v 2 in the ozone-containing airflow are read (step 406). Both outputs are compared, and if the difference is larger than a predetermined threshold value X, it is determined that there is an abnormality (Y in step 408,
409). After a while after stopping the ozone supply unit 4 (Step 4.0?, 4.1.OL, return to the beginning and read the sensor output S L V. Normally, this is repeated to continue monitoring, but the reading When time T reaches the calibration time (Y in step 4.01.4.02), the element section 3 enters the cleaning state (step 41.2.413.
The element surface is purified by the operation of the 414.41.5L ozone supply section 4. That is, the ozone supply section 4 in the monitoring state
In this operation, the element surface is not completely cleaned at all times, so cleaning is performed periodically. Therefore, the waiting time T2 when ozone is supplied in the purification state is made sufficiently longer than the waiting time T when ozone is supplied in the monitoring state. Also, the waiting time when supplying ozone in this operation is (steps 410 and 415)
, is the same as the waiting time T1 during ozone supply in the monitoring state, but may be a different time, such as making the ozone supply time longer. If the difference between the two sensor outputs does not exceed the threshold value X (comparing the NL sensor output 5LV2 with the predetermined value Y in step 408, and if it exceeds the predetermined value Y, display an abnormality. Y in steps 416, 417); The display is canceled (N in step 416, 4.18). In other words, if an abnormality is displayed, a problem such as contamination of the element section 3 has occurred, and therefore it is necessary to clean it or replace it.

本実施例の構成を備える場合、通気管2の図示しない排
気口部分には、オゾンを分解する触媒等を設け、オゾン
を完全に分解してから排気することが好ましい。
When the configuration of this embodiment is provided, it is preferable that a catalyst or the like for decomposing ozone is provided at the exhaust port (not shown) of the vent pipe 2, and the ozone is completely decomposed before being exhausted.

〔発明の効果〕〔Effect of the invention〕

本発明による臭い検出装置では、測定気流中にオゾンを
混入させるので、素子部を簡便に臭いのない状態にする
ことができ、正確な零値の出力値を設定できるので確実
な異常判別が行える。
In the odor detection device according to the present invention, since ozone is mixed into the measured airflow, the element part can be easily made odor-free, and an accurate zero output value can be set, allowing reliable abnormality determination. .

また、監視区域の空気に定期的にオゾンを混入させ、オ
ゾン発生時とオゾンのない時での出力差から臭いの異常
を判別することにより、素子部の出力が安定するまで待
つ必要がなく、継続的に監視することが可能である。
In addition, by periodically mixing ozone into the air in the monitoring area and determining odor abnormalities from the difference in output between when ozone is generated and when there is no ozone, there is no need to wait until the output of the element section stabilizes. Continuous monitoring is possible.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、本発明による一実施例の構成を示す概略図、
第2図は、第1図の動作を示すフローチャート、第3図
は、制御部を示すブロック回路図、第4図は、第1図の
他の動作を示すフローチャートである。 3・・・素子部、4・・・オゾン供給部、5・・・制御
部。
FIG. 1 is a schematic diagram showing the configuration of an embodiment according to the present invention;
2 is a flowchart showing the operation of FIG. 1, FIG. 3 is a block circuit diagram showing the control section, and FIG. 4 is a flowchart showing another operation of FIG. 1. 3... Element section, 4... Ozone supply section, 5... Control section.

Claims (3)

【特許請求の範囲】[Claims] (1)監視区域の空気をサンプリングして異常な臭いを
検出する臭い検出装置において、空気中の臭いを検出す
る素子部と、オゾンを供給するオゾン供給部と、前記素
子部に空気を送る吸引部と、前記各部を制御する制御部
とを有し、前記制御部は、マイクロコンピュータを備え
、前記素子部からの出力値から異常な臭いを判別する異
常判別手段を有していることを特徴とする臭い検出装置
(1) An odor detection device that samples the air in a monitoring area to detect abnormal odors, which includes an element section that detects odor in the air, an ozone supply section that supplies ozone, and a suction device that sends air to the element section. and a control unit that controls each of the units, and the control unit includes a microcomputer and abnormality determining means for determining an abnormal odor from the output value from the element unit. odor detection device.
(2)異常判別手段は、オゾン供給部からのオゾン混入
気流中での素子部の出力値を基準として、所定の閾値を
設定し、前記素子部の空気中での出力値が前記閾値を超
えるときに異常と判別することを特徴とする請求項第1
記載の臭い検出装置。
(2) The abnormality determination means sets a predetermined threshold value based on the output value of the element part in the ozone-containing airflow from the ozone supply part, and the output value of the element part in air exceeds the threshold value. Claim 1 characterized in that it is sometimes determined to be abnormal.
The odor detection device described.
(3)異常判別手段は、オゾン供給部の定期的な作動に
より、サンプリングされた空気中にオゾンが定期的に混
入され、素子部のオゾンなしでの出力値とオゾン有りで
の出力値との差が所定の値を超えるときに異常と判別す
ることを特徴とする請求項第1記載の臭い検出装置。
(3) The abnormality determination means is such that ozone is periodically mixed into the sampled air by the regular operation of the ozone supply section, and the output value of the element section without ozone and the output value with ozone is different. The odor detection device according to claim 1, wherein the odor detection device is determined to be abnormal when the difference exceeds a predetermined value.
JP1205818A 1989-08-10 1989-08-10 Odor detector Expired - Fee Related JP2818869B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000155107A (en) * 1998-11-20 2000-06-06 Shimadzu Corp Gas measuring apparatus
JP2010509599A (en) * 2006-11-14 2010-03-25 イーエイーディーエス、ドイチュラント、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング Detectors for detecting chemical warfare agents, manufacturing methods, and use of substrates as warfare agent detectors
CN103654988A (en) * 2012-08-30 2014-03-26 财团法人工业技术研究院 Hand-held device for ozone disinfection, cover cap, ozone concentration sensing module and method
CN105842301A (en) * 2015-01-30 2016-08-10 Toto株式会社 Biological information measurement system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5639450A (en) * 1979-06-16 1981-04-15 Bayer Ag Method and device for monitoring exposure of person to harmful gas
JPS6434557U (en) * 1987-08-20 1989-03-02
JPH01131444A (en) * 1987-11-17 1989-05-24 Katsuo Ebara Smell discrimination device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5639450A (en) * 1979-06-16 1981-04-15 Bayer Ag Method and device for monitoring exposure of person to harmful gas
JPS6434557U (en) * 1987-08-20 1989-03-02
JPH01131444A (en) * 1987-11-17 1989-05-24 Katsuo Ebara Smell discrimination device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000155107A (en) * 1998-11-20 2000-06-06 Shimadzu Corp Gas measuring apparatus
JP2010509599A (en) * 2006-11-14 2010-03-25 イーエイーディーエス、ドイチュラント、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング Detectors for detecting chemical warfare agents, manufacturing methods, and use of substrates as warfare agent detectors
CN103654988A (en) * 2012-08-30 2014-03-26 财团法人工业技术研究院 Hand-held device for ozone disinfection, cover cap, ozone concentration sensing module and method
CN105842301A (en) * 2015-01-30 2016-08-10 Toto株式会社 Biological information measurement system

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