JPH0221919A - Air cleaner - Google Patents
Air cleanerInfo
- Publication number
- JPH0221919A JPH0221919A JP17214888A JP17214888A JPH0221919A JP H0221919 A JPH0221919 A JP H0221919A JP 17214888 A JP17214888 A JP 17214888A JP 17214888 A JP17214888 A JP 17214888A JP H0221919 A JPH0221919 A JP H0221919A
- Authority
- JP
- Japan
- Prior art keywords
- thermistor
- air path
- self
- dust collecting
- dust collection
- 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.)
- Pending
Links
- 239000000428 dust Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 230000007423 decrease Effects 0.000 claims description 10
- 238000007664 blowing Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は空気清浄装置の集塵部の交換（洗浄）２
・
時期の表示機能に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to the replacement (cleaning) of the dust collection section of an air purifying device 2
- This is related to the time display function.
従来の技術
集塵部の目づｔｂによる風速の低下を自己加熱型サーミ
スターによシ検知し、集塵部の交換（洗浄）時期を表示
する機能を有する空気清浄装置において、処理風量の切
換えに対応する手段として、風量切換に連動する切換ス
イッチを設け、前記自己加熱型サーミスターの電流値、
または、風速検知信号（前記サーミスターの抵抗値に比
例した電圧）と比較する基準電圧値を切換える方式が提
案されている。以下従来の技術について図面を参照しな
がら説明する。Conventional technology A self-heating thermistor detects a decrease in wind speed due to the dust collection part and indicates when it is time to replace (clean) the dust collection part. As a means to cope with this, a changeover switch is provided that is linked to the air volume changeover, and the current value of the self-heating thermistor,
Alternatively, a method has been proposed in which a reference voltage value to be compared with a wind speed detection signal (voltage proportional to the resistance value of the thermistor) is switched. The conventional technology will be explained below with reference to the drawings.
第２図に従来の技術による空気清浄装置の構成を示す。FIG. 2 shows the configuration of a conventional air cleaning device.
第２図において、１は集塵部、２は送風用ファン、３は
箱体で風路を形成している。４は自己加熱型サーミスタ
ー、５は温度補償用サーミスター、６はコンパレータ、
７はト：ｙンジスタ、８は発光ダイオード、９は電源、
１０は処理風量の切換〔強・弱〕に連動して動作する切
換スイッチ、Ｒ１はサーミスター４に定電流を流す抵抗
、３ ／、 ２
Ｒ２，Ｒ２１は温度補償用サーミスター５に微少電流を
流すための抵抗で、処理風量に応じて切換スイッチ１０
によシ、いずれか一方を選択して電流値を切換えている
。Ｒ３はコンパレータ６の出力トランジスタＴにベース
電流を流すだめの抵抗、Ｒ４は発光ダイオード８の電流
を設定する抵抗である。In FIG. 2, 1 is a dust collection part, 2 is a fan for blowing air, and 3 is a box body forming an air path. 4 is a self-heating thermistor, 5 is a temperature compensation thermistor, 6 is a comparator,
7 is a transistor, 8 is a light emitting diode, 9 is a power supply,
10 is a changeover switch that operates in conjunction with switching the processing air volume [strong/weak], R1 is a resistor that causes a constant current to flow through the thermistor 4, 3/, 2 R2 and R21 apply a small current to the thermistor 5 for temperature compensation. Resistance for flow, changeover switch 10 depending on the processing air volume
Depending on the situation, the current value is switched by selecting one of the two. R3 is a resistor for allowing the base current to flow through the output transistor T of the comparator 6, and R4 is a resistor for setting the current of the light emitting diode 8.
第４図は、第２図のサーミスター４の特性を示す図で、
横軸に温度（”ｃ） 、縦軸に抵抗値（Ｄ）を夫々対数
目盛で表すと、抵抗−温度特性の傾向は実線のようにな
る。FIG. 4 is a diagram showing the characteristics of the thermistor 4 shown in FIG.
When temperature ("c) is plotted on the horizontal axis and resistance value (D) is plotted on the vertical axis on a logarithmic scale, the tendency of the resistance-temperature characteristic is shown as a solid line.
抵抗Ｒ１により定電流■を流すとサーミスタ４は自己加
熱により温度が上昇する。周囲温度Ｔａの時の抵抗値が
ＲａＱで、自己加熱による温度上昇がＴｂとすると、そ
の時の抵抗値は無風状態ではＴａ＋Ｔｂの時の抵抗値Ｒ
６（，１２）となるが、この自己加熱状態のサーミスタ
ー４の周囲温度に対する無風状態での抵抗−温度特性は
点線のようになる。When a constant current (2) is applied through the resistor R1, the temperature of the thermistor 4 rises due to self-heating. If the resistance value when the ambient temperature is Ta is RaQ, and the temperature rise due to self-heating is Tb, then the resistance value at that time is the resistance value R when Ta + Tb in a windless state.
6 (, 12), and the resistance-temperature characteristic of the thermistor 4 in this self-heating state with respect to the ambient temperature in a windless state is as shown by a dotted line.
以上のように構成された空気清浄装置について、以下、
第２図〜第４図を用いてその動作を説明する。Regarding the air purifying device configured as above, the following is as follows.
The operation will be explained using FIGS. 2 to 4.
風量〔強〕で運転時、切換スイッチ１０は接点Ａ−Ｃ間
がＯＮ（第２図に示す状態）で温度補償用サーミスター
５には抵抗Ｒ２にょ９微小電流が流れ基準電圧ＥＳを設
定している。風量が〔弱〕に切換ると、切換スイッチ１
０は連動して切換り、第３図に示すように接点Ｂ−Ｃ間
がＱＮになり、サーミスター５との直列抵抗はＲ２′に
切換り、基準電圧ばＥＳｌとなる。風量〔弱〕の場合、
自己加熱型サーミスター４の風速による冷却効果は減少
し、抵抗値は低下し、サーミスター両端の電圧Ｅｘは低
下する。When operating at high airflow, the changeover switch 10 is turned on between contacts A and C (state shown in Figure 2), and a small current flows through the temperature compensation thermistor 5 through the resistor R2 to set the reference voltage ES. ing. When the air volume is changed to [low], selector switch 1
0 are switched in conjunction with each other, and as shown in FIG. 3, the connection between contacts B and C becomes QN, the series resistance with the thermistor 5 is switched to R2', and the reference voltage becomes ESL. If the air volume is [weak],
The cooling effect of the self-heating thermistor 4 due to the wind speed decreases, the resistance value decreases, and the voltage Ex across the thermistor decreases.
従って基準電圧もＲ８〉Ｒ８１とする必要がある。Therefore, the reference voltage must also be set such that R8>R81.
Ｅ、の電圧値は、風量〔弱〕で集塵部の目づ壕り状態が
規定の風量（例えば初期値の７５係）に達した時の風量
で得られるサーミスター４の両端電圧値をＥｘｌとすれ
ば、Ｅｓっ−Ｅｘ４となるようにＲ２′の抵抗値を定め
れば、Ｅｘｌ＜Ｅｓ１の時コンパレーター６の出力はＨ
に反転し、トランジスタ７のＣ−６間はＯＮとなり、発
光ダイオード８が慨灯し、風量〔弱〕運転においても、
集塵部１の適切な交換時期を表示することができる。The voltage value of E is the voltage value across the thermistor 4 obtained at the air flow rate when the air flow rate is [weak] and the engraving condition of the dust collecting part reaches the specified air flow rate (for example, the initial value of 75). If Exl is set, then if the resistance value of R2' is determined so that Es-Ex4, the output of comparator 6 will be H when Exl<Es1.
, the transistor 7 between C and 6 becomes ON, the light emitting diode 8 lights up, and even in low air volume operation,
Appropriate replacement timing for the dust collecting section 1 can be displayed.
発明が解決しようとする課題
しかし々から、処理風量の切換は一般にファン用モータ
ーの極数切換や、モーター巻線の巻数切換えによって行
われるため、前記切換スイッチ１０との機械的な連動は
困難で、切換スイッチ１０をリレー接点とし、リレーコ
イルの通電を処理風量切換スイッチで行う方式となシコ
スト高になると云う問題点を有していた。Problems to be Solved by the Invention However, since the processing air volume is generally changed by changing the number of poles of the fan motor or the number of turns of the motor winding, mechanical interlocking with the changeover switch 10 is difficult. , the changeover switch 10 is a relay contact, and the relay coil is energized by the processing air volume changeover switch, which has the problem of high cost.
本発明は上記問題点を解決し、低コストの切換方式を提
供するものである。The present invention solves the above problems and provides a low cost switching system.
課題を解決するだめの手段
上記問題点を解決するために、本発明の空気清浄装置は
集塵部を通過する空気流のメイン風路と、集塵部の圧力
損失に影響されないバイパス風路を設け、メイン風路の
集塵部下流側とバイパス風路内に、夫々定電流を流した
自己加熱型サーミスタを設置し、各サーミスター両端の
電圧を比較するよう構成したものである。Means for Solving the Problems In order to solve the above problems, the air cleaning device of the present invention has a main air passage for airflow passing through the dust collection section and a bypass air passage that is not affected by the pressure loss of the dust collection section. A self-heating thermistor with a constant current flowing therein is installed downstream of the dust collecting section in the main air path and in the bypass air path, respectively, and the voltages across the two ends of each thermistor are compared.
６ベーノ
作 用
本発明は上記した構成により、処理風量の切換に影響々
く、バイパス風路内の風速を基準とし、集塵部下流側の
風速の低下を検知し、風速の低下が設定値に達した時、
集塵部の交換（洗浄）時期を表示する。6 Vane effect The present invention has the above-mentioned configuration, which affects the switching of the processing air volume, detects a decrease in the wind speed on the downstream side of the dust collection part based on the wind speed in the bypass air passage, and detects the decrease in the wind speed at the set value. When it reaches
Displays when to replace (clean) the dust collection section.
実施例
以下本発明の一実施例の空気清浄装置にっ因て図面を参
照しながら説明する。EXAMPLE Hereinafter, an air cleaning device according to an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の実施例における空気清浄装置の構成を
示すものである。第１図において、１１はバイパス風路
、１２はバイパス風路内に設置した自己加熱型サーミス
ター、Ｒ２１はサーミスター１２に定電流を流すための
抵抗、４はメイン風路内の集塵部下流側に設置した自己
加熱型サーミスター、その他従来例と同一内容について
は説明を省略する。なお、バイパス風路の面積は集塵部
の窓面債の１％以下にすることができるのでバイパス回
路を設けたことによる集塵効率の低下は無視できる。FIG. 1 shows the configuration of an air cleaning device in an embodiment of the present invention. In Fig. 1, 11 is a bypass air path, 12 is a self-heating thermistor installed in the bypass air path, R21 is a resistor for passing a constant current to the thermistor 12, and 4 is a dust collection part in the main air path. A description of the self-heating thermistor installed on the downstream side and other contents that are the same as in the conventional example will be omitted. Incidentally, since the area of the bypass air passage can be set to 1% or less of the window surface area of the dust collection section, the reduction in dust collection efficiency due to the provision of the bypass circuit can be ignored.
以上のように構成された空気清浄装置について、その動
作を説明する。The operation of the air cleaning device configured as above will be explained.
運転前、バイパス風路内の自己加熱型サーミスター１２
．メイン風路内の自己加熱型サーミスター４は夫々の風
路内の風速により冷却され、無風状態より抵抗値が上昇
する。サーミスター１２の抵抗値に比例して発生する重
ＥＥを基準電圧Ｅ６とする。丑だ、サーミスター４の抵
抗値に比例して発生ずる電圧をＥｘとする。、集塵部の
Ｌｌづ寸りにより、メイン風路の風速は低下し、サーミ
スタ４の冷却は弱まり、抵抗値は−１−眉しＥｘは増加
する。Before operation, self-heating thermistor 12 in the bypass air path
．． The self-heating thermistor 4 in the main air passages is cooled by the wind speed in each air passage, and its resistance value increases from that in a no-wind state. The heavy EE generated in proportion to the resistance value of the thermistor 12 is defined as a reference voltage E6. Let Ex be the voltage generated in proportion to the resistance value of the thermistor 4. By increasing the size of the dust collection part by Ll, the wind speed in the main air passage decreases, the cooling of the thermistor 4 weakens, and the resistance value increases by -1 - Ex.
メイン風路の風速を■Ｍ、バイパス風路の風速をＶＢと
すると、常にＶＢ〉７Ｍの関係にあり、ＶＢ ： ＶＭ
は初期ば１：０．９８〜０．９５（ＶＢを１とせる）程
度であるが、集塵部の目づ１りが進行すると、ＶＢと７
Ｍの比が大きくなるが、１：０．７５報度が限度と考え
られる（空調装置と組合ぜた場合、初期値からの冷暖房
能力の低下は約２６％となる）。If the wind speed in the main air path is ■M and the wind speed in the bypass air path is VB, the relationship is always VB>7M, and VB : VM
Initially, the value is about 1:0.98 to 0.95 (setting VB as 1), but as the dust collection part becomes clogged, VB and 7
Although the ratio of M increases, the limit is considered to be 1:0.75 (when combined with an air conditioner, the cooling/heating capacity decreases from the initial value by about 26%).
になるよう設定する必要があるが、サーミスタ４、サー
ミスター５は風速の検知と共に周囲温度の影響を打消す
ために、各サーミスターの抵抗潅１度粕性、熱放敗常数
（ｍｗ ／ ”Ｃ） 、無風状態での消費’ｒｌｉ、力
も舌しくすることが望せしい。従って、同種のザルミス
タ−で抵抗値のみサーミスター４か高く選定すればよい
。Thermistor 4 and thermistor 5 must be set to detect the wind speed and to cancel the influence of ambient temperature. C) It is desirable that the consumption 'rli and force in a calm state should be moderate.Therefore, it is only necessary to select a thermistor with a resistance value of 4 or higher among the same type of thermister.
以上の設定により、集塵部が初期の状態ではＥｘ＞Ｅｓ
であり、コンパレータ６の出力はＬ（ＬＯＷ）トランジ
スタ７のＣ−０間はＯＦＦであり、発光ダイオード８は
消灯している。集塵部のｌづ寸りか進？−１するとＥｘ
−！−Ｅｓとなり、コンパレーター６の出力はＨ（ＨＩ
ＧＨ）に反転し、トランジスタ７のＣ−９間ＯＮ９発光
ダイオード８は点灯し、集塵部の交換（洗顔）前期を表
示する。風量が切換った場合もＶＢとｖＭの比率はは＼
゛一定であるため、ＥｘとＥｓの比率は変らす、前記と
同じ動作となる５、発明の効果
以上のように本発明は、バイパス風路を設け、バイパス
風路内にも自己加熱型サーミスターが設置することによ
り、バイパス風路の風速を基環に、集塵部の目づまりに
よる風速の低下を検知するため、処理風量が切換った場
合も支障なく集塵部の交換（洗浄）時期を表示すること
ができる。徒だ、電子回路内に切換スイッチを必要とせ
ず、構造の簡略化とコスト低減を可能とするものである
。With the above settings, when the dust collection part is in the initial state, Ex>E
The output of the comparator 6 is L (LOW), and between C and 0 of the transistor 7 is OFF, and the light emitting diode 8 is off. Is the dust collection part l-sized? -1 then Ex
-! -Es, and the output of comparator 6 is H (HI
GH), and the ON9 light-emitting diode 8 between C-9 of the transistor 7 lights up, indicating that the dust collecting section is to be replaced (face washing) in the first half. Even when the air volume is changed, the ratio of VB and vM remains the same.
Since the ratio of Ex and Es is constant, the operation is the same as above. By installing a mister, it detects a decrease in wind speed due to clogging of the dust collection section based on the wind speed of the bypass air path, so even if the processing air volume is changed, the dust collection section can be replaced (cleaned) without any problem. The time can be displayed. No need for a changeover switch in the electronic circuit, which simplifies the structure and reduces costs.
第１図は本発明の実施例の空気清浄装置の構成を示す図
、第２図は従来の空気Ｒ浮装置の１イ４成を示す図、第
３図は第２図の切換動作を説明する部分図、第４図はサ
ーミスターの特性図である。
１１ ・バイパス風路、１２・・ 自己加熱型ザミスタ
−１Ｒ２１・・・抵抗。Fig. 1 is a diagram showing the configuration of an air purifying device according to an embodiment of the present invention, Fig. 2 is a diagram showing the 1-4 configuration of a conventional air R floating device, and Fig. 3 explains the switching operation of Fig. 2. The partial diagram shown in FIG. 4 is a characteristic diagram of the thermistor. 11 ・Bypass air path, 12... Self-heating type Zamister-1R21... Resistor.
Claims (1)
損失に影響されないバイパス風路と、メイン風路の集塵
部下流側とバイパス風路内に夫々設置され定電流を流し
た自己加熱型サーミスターと、バイパス風路内に設けた
サーミスターの抵抗値に比例するサーミスター両端の電
圧を設定電圧とし、メイン風路側サーミスターの抵抗値
の変化を電圧変化として検知し、風速の変化として捉え
、初期値からの集塵部の目づまりによるメイン風路の風
速の低下を風速の設定値に相当する設定電圧と比較し、
前記電圧が設定電圧に達した時、集塵部の交換（または
洗浄）時期を表示する表示器とを設けたことを特徴とす
る空気清浄装置。A main air path for airflow passing through the dust collection section, a bypass air path that is not affected by pressure loss in the dust collection section, and a constant current flowing through the main air path downstream of the dust collection section and inside the bypass air path. The set voltage is the voltage across the thermistor that is proportional to the resistance value of the self-heating thermistor installed in the bypass air path and the thermistor installed in the bypass air path, and changes in the resistance value of the thermistor on the main air path side are detected as voltage changes, Considering this as a change in wind speed, the decrease in wind speed in the main wind path due to clogging of the dust collecting section from the initial value is compared with the set voltage corresponding to the set value of wind speed.
An air purifying device comprising: an indicator that indicates when to replace (or clean) the dust collecting section when the voltage reaches a set voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17214888A JPH0221919A (en) | 1988-07-11 | 1988-07-11 | Air cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17214888A JPH0221919A (en) | 1988-07-11 | 1988-07-11 | Air cleaner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0221919A true JPH0221919A (en) | 1990-01-24 |
Family
ID=15936455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17214888A Pending JPH0221919A (en) | 1988-07-11 | 1988-07-11 | Air cleaner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0221919A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003071225A (en) * | 2001-08-17 | 2003-03-11 | Carl Freudenberg Kg | Method and apparatus for monitoring life of filter |
| JP2007278538A (en) * | 2006-04-03 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Ventilation device and ventilation system |
-
1988
- 1988-07-11 JP JP17214888A patent/JPH0221919A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003071225A (en) * | 2001-08-17 | 2003-03-11 | Carl Freudenberg Kg | Method and apparatus for monitoring life of filter |
| JP2007278538A (en) * | 2006-04-03 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Ventilation device and ventilation system |
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