JPH0441262B2 - - Google Patents
Info
- Publication number
- JPH0441262B2 JPH0441262B2 JP61055572A JP5557286A JPH0441262B2 JP H0441262 B2 JPH0441262 B2 JP H0441262B2 JP 61055572 A JP61055572 A JP 61055572A JP 5557286 A JP5557286 A JP 5557286A JP H0441262 B2 JPH0441262 B2 JP H0441262B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- detecting
- fan motor
- difference
- range hood
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 19
- 230000007423 decrease Effects 0.000 claims description 12
- 238000009529 body temperature measurement Methods 0.000 claims description 11
- 230000000630 rising effect Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Ventilation (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は台所の換気に使用するレンジフード
フアンの自動運転装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an automatic operating device for a range hood fan used for ventilation in a kitchen.
従来のレンジフードフアンの自動運転装置とし
ては、例えば実公昭59−37613号公報に示されて
いるように、ガスレンジ上部レンジフード内など
熱源近くと、レンジフード外部の室内とにそれぞ
れサーミスタ等の感温素子を設け、これら両感温
素子で温度差を比較検出し、この温度差が一定値
以上の間フアンを自動的に駆動する方法が使用さ
れてきた。
As shown in Japanese Utility Model Publication No. 59-37613, conventional automatic operation devices for range hood fans include thermistors and the like installed near the heat source, such as inside the range hood above the gas range, and inside the room outside the range hood. A method has been used in which a temperature sensing element is provided, a temperature difference is comparatively detected by these two temperature sensing elements, and the fan is automatically driven as long as this temperature difference is above a certain value.
この方式は、ガスレンジの点火によりレンジフ
ード内の温度と室温との温度差が大となり、ガス
レンジが消火されレンジフード内の換気が充分行
われるとその温度差が小さくなることを利用した
もので、夏期及び冬期の気温変化に対し安定な動
作が行われる。 This method takes advantage of the fact that when the gas range is ignited, there is a large temperature difference between the temperature inside the range hood and the room temperature, and when the gas range is extinguished and the range hood is sufficiently ventilated, this temperature difference becomes smaller. This ensures stable operation against temperature changes in summer and winter.
従来のレンジフードフアンの自動運転装置は以
上のように構成され、熱源の近くと、熱源と離れ
た位置の二個所に感温素子を配置し、これらをケ
ーブルで接続する必要があるため、感温素子、ケ
ーブル等の部品数が増加すると共にケーブル配線
の工事を必要とし、又、ケーブルの断線感温素子
設置場所の不適当等により所定の動作が実現でき
なくなる恐れもあり、さらにケーブルの配線によ
る外観上の問題がある等の問題点があつた。
Conventional automatic operation devices for range hood fans are configured as described above, and it is necessary to place temperature sensing elements in two places, one near the heat source and one away from the heat source, and connect them with a cable. As the number of components such as temperature sensing elements and cables increases, cable wiring work is required, and there is a risk that the desired operation may not be achieved due to cable breakage or inappropriate placement of the temperature sensing element. There were problems such as problems with the appearance.
この発明は以上の問題点を解消するためになさ
れたもので、感温素子が１個ですみ、遠くの感温
素子へのケーブル配線を必要とせずに安定な動作
が期待できるレンジフードフアンの自動運転装置
を得ることを目的としている。 This invention was made to solve the above problems, and is a range hood fan that requires only one temperature sensing element and can be expected to operate stably without the need for cable wiring to a distant temperature sensing element. The aim is to obtain self-driving devices.
この発明にかかるレンジフードフアンの自動運
転装置は、レンジ上部のレンジフード内部に、こ
のレンジの加熱状態を検出する感温素子を１個だ
け設け、この感温素子の検出温度を連続してある
いは所定時間毎に測定する温度測定手段、この手
段により現温度測定値と所定時間前の温度測定値
とを比較し温度上昇か下降かを判断し、その温度
差を計測する温度上昇下降温度差計測手段と、こ
の手段により計測された上昇温度差が所定温度差
以上であることを検出する温度上昇率増加検出手
段及び上記手段により計測された減少温度差が所
定温度以下であることを検出する温度下降率減少
検出手段とからなる温度変化率計測手段及び上記
温度上昇率増加検出手段による検出に応じ上記フ
アンモータを運転開始するフアンモータ運転開始
手段と、上記温度測定手段による現温度測定値が
所定温度以下の時の上記温度下降率減少検出手段
による検出に応じ上記フアンモータを停止させる
フアンモータ停止手段とからなるフアンモータ制
御手段を設けたものである。
The automatic operation device for a range hood fan according to the present invention is provided with only one temperature sensing element for detecting the heating state of the range inside the range hood at the top of the range, and continuously or continuously detects the temperature detected by this temperature sensing element. Temperature measuring means that measures at predetermined time intervals; temperature rise/fall temperature difference measurement that uses this means to compare the current temperature measurement value with the temperature measurement value from a predetermined time ago to determine whether the temperature is rising or falling, and measuring the temperature difference; means, a temperature increase rate increase detection means for detecting that the temperature rise difference measured by the means is equal to or higher than a predetermined temperature difference, and a temperature increase detection means for detecting that the decrease temperature difference measured by the means is equal to or lower than the predetermined temperature. a temperature change rate measuring means comprising a rate of fall decrease detecting means; a fan motor operation start means for starting the fan motor in response to detection by the temperature increase rate increase detecting means; and a current temperature measurement value by the temperature measuring means is set to a predetermined value. A fan motor control means is provided, which comprises a fan motor stop means for stopping the fan motor in response to detection by the temperature drop rate reduction detection means when the temperature is below the temperature.
この発明はレンジ近傍の温度上昇率が所定値以
上の時フアンモータの運転を開始し、温度減少率
が所定値以下でしかも所定温度以下の時フアンモ
ータを停止する等の制御を行なうことによつて、
１個の感温素子によつて夏冬の気温変化に対して
安定なレンジフードフアンの運転が可能となつ
た。
This invention starts operating the fan motor when the temperature increase rate near the range is above a predetermined value, and stops the fan motor when the temperature decrease rate is below a predetermined value and also below the predetermined temperature. Then,
A single temperature sensing element enables stable operation of the range hood fan against temperature changes in summer and winter.
以下この発明の一実施例を図について説明す
る。第１図はこの発明の一実施例の全体構成図で
ある。この実施例は第１図から明らかなように、
ガスレンジ（図示されていない）上部のレンジフ
ード内部感温部に、フアンモータ１に近傍して設
けられたサーミスタ等の感温素子２からの信号に
より、感温部の温度を連続して測定し記憶する温
度測定手段３、この手段３による現測定値とそれ
に記憶されている所定の単位時間前の測定値とを
比較し、温度上昇か下降かを判断して、その温度
差を計測する温度上昇下降温度差計測手段４、こ
の手段４により計測された上昇温度差が所定温度
差以上であることを検出する温度上昇率増加検出
手段５、上記手段４により計測された下降温度差
が所定温度差以下であることを検出する温度下降
率減少検出手段６、上記手段５による検出に応じ
フアンモータ１の運転を開始するフアンモータ運
転開始手段７、及び上記手段３からの現測定値が
所定温度以下の時の上記手段６による検出に応じ
フアンモータ１の運転を停止するフアンモータ停
止手段８から構成されている。なお、上記手段
４，５及び６により温度変化率計測手段９が、上
記手段７及び８によりフアンモータ制御手段１０
が構成されている。
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an embodiment of the present invention. As is clear from FIG. 1, this embodiment has the following features:
The temperature of the temperature sensing part inside the range hood at the top of the gas range (not shown) is continuously measured by a signal from a temperature sensing element 2 such as a thermistor installed near the fan motor 1. A temperature measuring means 3 for storing, compares the current measured value by this means 3 with the measured value stored therein a predetermined unit time ago, determines whether the temperature is rising or falling, and measures the temperature difference. Temperature rise/fall temperature difference measuring means 4; temperature rise rate increase detection means 5 for detecting that the rise temperature difference measured by this means 4 is equal to or higher than a predetermined temperature difference; A temperature drop rate decrease detection means 6 detects that the temperature is below the temperature difference, a fan motor operation start means 7 starts the operation of the fan motor 1 in response to the detection by the means 5, and the current measured value from the means 3 is set to a predetermined value. The fan motor stop means 8 is configured to stop the operation of the fan motor 1 in response to the detection by the means 6 when the temperature is below the temperature. The temperature change rate measuring means 9 is controlled by the means 4, 5 and 6, and the fan motor control means 10 is controlled by the means 7 and 8.
is configured.
第２図は第１図の実施例の電気接続を示す回路
図で、図において１はフアンモータ、２は感温素
子、１１は商用電源、１２は制御直流電源端子、
１３は分圧抵抗、１４は感温素子２の特性補償用
抵抗、１５は、第１図の各手段３〜８を実行する
マイクロコンピユータ（以下マイコンという）、
１６はこのマイコン１５のクロツク発生回路、１
７はトライアツク等のスイツチング素子、１８は
スイツチング素子１７のトリガ用トランジスタ、
１９，２０は抵抗である。 FIG. 2 is a circuit diagram showing the electrical connections of the embodiment shown in FIG.
13 is a voltage dividing resistor; 14 is a resistor for compensating the characteristics of the temperature sensing element 2; 15 is a microcomputer (hereinafter referred to as microcomputer) that executes each means 3 to 8 in FIG.
16 is a clock generation circuit of this microcomputer 15;
7 is a switching element such as a triax; 18 is a trigger transistor for the switching element 17;
19 and 20 are resistances.
以下その動作を第３図、第４図及び第５図によ
つて説明する。第３図はマイコン１５によつて実
行される各手段のフローチヤート、第４図はレン
ジの点火、消火によるレンジフード内の温度変化
を示すタイムチヤート、第５図はこの実施例の動
作を説明するタイムチヤートである。 The operation will be explained below with reference to FIGS. 3, 4, and 5. Fig. 3 is a flowchart of each means executed by the microcomputer 15, Fig. 4 is a time chart showing temperature changes in the range hood due to ignition and extinguishing of the range, and Fig. 5 explains the operation of this embodiment. This is a time chart.
まず第４図によつて温度検出手段３及び温度上
昇下降温度差計測手段４の動作を説明する。レン
ジ（図示されない）の点火によりレンジフード内
の温度が第４図に示すように上昇していくと、こ
の温度変化を感温素子２が感知しその抵抗が変化
しそれが分圧抵抗１３、補償抵抗１４とによつて
電圧変化となつてマイコン１５に入力される。マ
イコン１５ではクロツク発生回路１６からのクロ
ツクによつて計時される所定時間ΔT毎の温度ｔ
を読み込み記憶していき（温度検出手段）、そし
て現時点の温度とΔT前の温度との温度差Δtを計
測していく（温度上昇下降温度差計測手段）。即
ちガスレンジ点火時は温度上昇するので上昇温度
差＋Δtが、消火後は温度が下降するので下降温
度差−Δtが検出される。 First, the operations of the temperature detection means 3 and the temperature rise/fall temperature difference measuring means 4 will be explained with reference to FIG. When the temperature inside the range hood rises as shown in FIG. 4 by igniting a range (not shown), the temperature sensing element 2 senses this temperature change and its resistance changes, causing the voltage dividing resistor 13, The voltage changes through the compensation resistor 14 and is input to the microcomputer 15. In the microcomputer 15, the temperature t is measured every predetermined time ΔT by the clock from the clock generation circuit 16.
(temperature detection means), and then measures the temperature difference Δt between the current temperature and the temperature before ΔT (temperature rise/fall temperature difference measurement means). That is, when the gas range is ignited, the temperature rises, so a rising temperature difference +Δt is detected, and after the fire is extinguished, the temperature falls, so a falling temperature difference -Δt is detected.
次に第３図、第５図によつてフアンモータ制御
動作を説明する。制御電源端子１２にDC電源が
投入されると、マイコン１５は動作を開始し、ス
テツプ２１でRAMクリア等のマイコン１５に必
要な初期設定を行ない、ステツプ２２で制御に必
要な初期値、即ち上限上昇率＋Δt1、下限下降率
−Δt2、タイムスロツトΔT及び下限設定温度TA
等を設定する。次にステツプ２３でタイマーを
ΔTにセツトし、ステツプ２４でタイマーがクロ
ツク発生回路１６からのクロツクを計時し、ステ
ツプ２５でタイマーのΔTのカウントアツプを検
出して、ステツプ２６でその時点における温度
（現温度測定値）をメモリに取込み記憶する。次
にステツプ２７でマイコンのメモリに記憶されて
いる前回、即ちΔT前の時点における温度データ
（ΔT前温度測定値）と現温度測定値と比較し、
ステツプ２８で温度上昇中か下降中かを判断す
る。スタート時は当然上昇であるので、ステツプ
２９でその温度差＋Δt1以上かどうか判定され、
換気扇を動作させるに必要な温度上昇率＋Δt1以
下ならば再びステツプ２３に戻り以上の動作を繰
り返す。温度上昇率が＋Δt1を越えるとステツプ
３０で換気扇をオンとする信号をマイコン１５が
出力しトリガートランジスタ１８をオンとしスイ
ツチング素子１７を導通させ、フアンモータ１の
動作を開始させる。この状態を第５図に示す。同
図ａはレンジフード感温部の温度を、ｂはレンジ
の点火、消火状態を、ｃはレンジフードフアンの
オン、オフ状態を、ｄは温度測定タイミングのタ
イムスロツトをそれぞれ示している。フアンモー
タ１の動作が開始するとフアンが廻るり始め、当
然感温部の温度上昇率は低下し何れはその温度も
下がるが、下よりレンジで加熱されるためある程
度以下には下がらない。そこでレンジを消火する
と加熱源がなくなり、温度が低下し始め所定の温
度TA以下となると、ステツプ３１からステツプ
３２に進み、温度下降率−Δtがあらかじめ設定
された値Δt2より小さくなるとステツプ３３に進
み、マイコン１５からトランジスタ１８へのスイ
ツチング素子１７をトリガーするための信号がな
くなり、スイツチング素子１７をオフとし、フア
ンモータ１を停止する。 Next, the fan motor control operation will be explained with reference to FIGS. 3 and 5. When DC power is applied to the control power supply terminal 12, the microcomputer 15 starts operating, and in step 21, performs necessary initial settings for the microcomputer 15, such as clearing the RAM, and in step 22, sets the initial value necessary for control, that is, the upper limit. Rising rate + Δt 1 , lower limit lowering rate - Δt 2 , time slot ΔT and lower limit set temperature TA
etc. Next, in step 23, the timer is set to ΔT, in step 24, the timer measures the clock from the clock generation circuit 16, in step 25, the timer's count-up of ΔT is detected, and in step 26, the temperature at that point ( The current temperature measurement value) is taken into memory and stored. Next, in step 27, the temperature data stored in the memory of the microcomputer at the previous time, that is, before ΔT (temperature measurement value before ΔT) is compared with the current temperature measurement value.
In step 28, it is determined whether the temperature is rising or falling. At the start, the temperature naturally rises, so in step 29 it is determined whether the temperature difference +Δt 1 or more,
If the temperature rise rate required to operate the ventilation fan is less than + Δt1 , the process returns to step 23 and the above operations are repeated. When the temperature increase rate exceeds + Δt1 , the microcomputer 15 outputs a signal to turn on the ventilation fan in step 30, turning on the trigger transistor 18, making the switching element 17 conductive, and starting the operation of the fan motor 1. This state is shown in FIG. In the figure, a shows the temperature of the range hood temperature sensing part, b shows the ignition/extinguishing state of the range, c shows the on/off state of the range hood fan, and d shows the time slot of the temperature measurement timing. When the operation of the fan motor 1 starts, the fan begins to rotate, and naturally the temperature increase rate of the temperature sensing part decreases, and the temperature will eventually drop, but it will not drop below a certain level because it is heated from below by the microwave. When the microwave is extinguished, the heating source disappears, and the temperature begins to drop below the predetermined temperature TA, the process proceeds from step 31 to step 32, and when the temperature decrease rate -Δt becomes less than the preset value Δt2 , the process proceeds to step 33. Then, the signal from the microcomputer 15 to the transistor 18 for triggering the switching element 17 disappears, the switching element 17 is turned off, and the fan motor 1 is stopped.
以上のようにこの発明によれば、レンジ及びレ
ンジフードフアン近傍の感温部の温度上昇率が所
定値以上の時フアンモータの運転を開始し、温度
減少値が所定値以下でしかも所定温度以下の時モ
ータを停止するようにしたので、夏期及び冬期の
気温変化に対しても安定した制御が行なえると共
に感温素子も１個ですむため部品点数が少なくな
り、レンジフードと離れた位置への配線工事も不
要となり装置が安価になり外観上の問題もなくな
る等の効果を有している。
As described above, according to the present invention, the fan motor starts operating when the temperature increase rate of the temperature sensing part near the range and range hood fan is equal to or higher than a predetermined value, and when the temperature decrease value is equal to or lower than the predetermined value and is lower than the predetermined temperature. Since the motor is stopped when the motor is turned off, stable control can be performed even when the temperature changes in summer and winter, and only one temperature sensing element is required, reducing the number of parts and allowing the motor to be placed away from the range hood. This has advantages such as eliminating the need for wiring work, making the device less expensive, and eliminating problems with its appearance.
第１図はこの発明の一実施例を示す全体構成
図、第２図はそれの電気接続を示す回路図、第３
図はその動作を示すフローチヤート、第４図、第
５図はその動作説明用のタイムチヤートである。
図において１はレンジフードフアン、２は感温
素子、３は温度測定手段、４は温度上昇下降温度
差計測手段、５は温度上昇率増加検出手段、６は
温度下降率減少検出手段、７はフアンモータ運転
開始手段、８はフアンモータ停止手段、９は温度
変化率計測手段、１０はフアンモータ制御手段、
１５はマイクロコンピユータである。図中同一符
号は同一或は相当部分を示す。
Fig. 1 is an overall configuration diagram showing one embodiment of the present invention, Fig. 2 is a circuit diagram showing its electrical connections, and Fig. 3 is a diagram showing the overall configuration of an embodiment of the invention.
The figure is a flowchart showing the operation, and FIGS. 4 and 5 are time charts for explaining the operation. In the figure, 1 is a range hood fan, 2 is a temperature sensing element, 3 is a temperature measuring means, 4 is a temperature rise/fall temperature difference measuring means, 5 is a temperature rise rate increase detection means, 6 is a temperature fall rate decrease detection means, and 7 is a temperature detection means. Fan motor operation start means; 8, fan motor stop means; 9, temperature change rate measuring means; 10, fan motor control means;
15 is a microcomputer. The same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
このレンジの加熱状態を検出する温度検出用感温
素子を備え、この感温素子の検出温度に応じフア
ンモータの運転を制御するようにしたレンジフー
ドフアンの自動運転装置において、上記感温素子
の検出温度を連続してあるいは所定時間毎に測定
する温度測定手段、この手段により現温度測定値
と所定時間前の温度測定値とを比較し温度上昇か
下降かを判断し、その温度差を計測する温度上昇
下降温度差計測手段と、この手段により計測され
た上昇温度差が所定温度差以上であることを検出
する温度上昇率増加検出手段及び上記手段により
計測された減少温度差が所定温度以下であること
を検出する温度下降率減少検出手段とからなる温
度変化率計測手段及び上記温度上昇率増加検出手
段による検出に応じ上記フアンモータを運転開始
するフアンモータ運転開始手段と、上記温度測定
手段による現温度測定値が所定温度以下の時の上
記温度下降率減少検出手段による検出に応じ上記
フアンモータを停止させるフアンモータ停止手段
とからなるフアンモータ制御手段を備えたことを
特徴とするレンジフードフアンの自動運転装置。1 Located inside the range hood at the top of the range,
In an automatic operation device for a range hood fan, which is equipped with a temperature sensing element for detecting the heating state of the microwave, and which controls the operation of a fan motor according to the temperature detected by the temperature sensing element, the temperature sensing element is Temperature measurement means that measures the detected temperature continuously or at predetermined time intervals; this means compares the current temperature measurement value with the temperature measurement value from a predetermined time ago, determines whether the temperature is rising or falling, and measures the temperature difference. a temperature increase/decrease temperature difference measuring means for detecting a temperature rise/fall temperature difference, a temperature increase rate increase detection means for detecting that a temperature rise difference measured by the means is a predetermined temperature difference or more, and a temperature rise rate increase detection means for detecting that a temperature decrease difference measured by the means is a predetermined temperature or less. a temperature change rate measuring means comprising a temperature decreasing rate decrease detecting means for detecting that the temperature is decreasing, a fan motor operation start means for starting the operation of the fan motor in response to the detection by the temperature rising rate increase detecting means, and the temperature measuring means A range hood comprising a fan motor control means for stopping the fan motor in response to detection by the temperature drop rate decrease detection means when the current temperature measurement value is below a predetermined temperature. Juan's self-driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5557286A JPS62213628A (en) | 1986-03-13 | 1986-03-13 | Automatic operating device for range hood fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5557286A JPS62213628A (en) | 1986-03-13 | 1986-03-13 | Automatic operating device for range hood fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62213628A JPS62213628A (en) | 1987-09-19 |
| JPH0441262B2 true JPH0441262B2 (en) | 1992-07-07 |
Family
ID=13002433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5557286A Granted JPS62213628A (en) | 1986-03-13 | 1986-03-13 | Automatic operating device for range hood fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62213628A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05746Y2 (en) * | 1986-06-06 | 1993-01-11 | ||
| JPS6314023A (en) * | 1986-06-27 | 1988-01-21 | Matsushita Seiko Co Ltd | Automatic operation device for ventilating fan for air conditioning |
| US5232152A (en) * | 1991-10-30 | 1993-08-03 | Tsang Richard W B | Range hood fan with atmospheric humidity sensor |
| JP4670377B2 (en) * | 2005-02-04 | 2011-04-13 | パナソニック株式会社 | Ventilation equipment |
| JP4511444B2 (en) * | 2005-10-26 | 2010-07-28 | レノボ・シンガポール・プライベート・リミテッド | Electronic device casing internal cooling system, cooling method, and electronic device |
| JP4952838B2 (en) * | 2010-11-18 | 2012-06-13 | パナソニック株式会社 | Ventilator and ventilation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6241543A (en) * | 1985-08-20 | 1987-02-23 | Matsushita Seiko Co Ltd | Automatic operation device for range hood |
| JPS6256725A (en) * | 1985-09-02 | 1987-03-12 | Matsushita Seiko Co Ltd | Ventilation fan driving device |
-
1986
- 1986-03-13 JP JP5557286A patent/JPS62213628A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6241543A (en) * | 1985-08-20 | 1987-02-23 | Matsushita Seiko Co Ltd | Automatic operation device for range hood |
| JPS6256725A (en) * | 1985-09-02 | 1987-03-12 | Matsushita Seiko Co Ltd | Ventilation fan driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62213628A (en) | 1987-09-19 |
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