JPH042853B2 - - Google Patents
Info
- Publication number
- JPH042853B2 JPH042853B2 JP11283984A JP11283984A JPH042853B2 JP H042853 B2 JPH042853 B2 JP H042853B2 JP 11283984 A JP11283984 A JP 11283984A JP 11283984 A JP11283984 A JP 11283984A JP H042853 B2 JPH042853 B2 JP H042853B2
- Authority
- JP
- Japan
- Prior art keywords
- ventilation
- area
- specific
- concentration
- index
- 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
Links
- 238000009423 ventilation Methods 0.000 claims description 140
- 239000003344 environmental pollutant Substances 0.000 claims description 13
- 231100000719 pollutant Toxicity 0.000 claims description 13
- 239000000428 dust Substances 0.000 description 39
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は換気装置に係り、特に室内の汚染物質
の濃度を一定値に維持する換気装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ventilation system, and more particularly to a ventilation system that maintains the concentration of indoor pollutants at a constant value.
工場、オフイス等において、粉塵等の汚染物質
によつて空気が汚染された場合、換気装置を用い
て空気を清浄化することが行われている。この換
気装置を運転するシステムとしては、室内の粉塵
の濃度を検出し、その粉塵濃度が設定値以下に維
持される換気量で換気装置を運転する方法等が採
用されていた。
In factories, offices, etc., when the air is contaminated with pollutants such as dust, ventilation devices are used to purify the air. As a system for operating this ventilation device, a method has been adopted in which the concentration of dust in the room is detected and the ventilation device is operated at a ventilation rate that maintains the dust concentration below a set value.
しかるに、従来のシステムでは、室内の換気領
域を複数の換気装置で分担し、室内の粉塵濃度を
均一にする場合、各換気領域毎に粉塵検出器を配
設し、各粉塵検出器の検出出力に基づいて各換気
装置の運転を制御することがなされていた。この
ため、従来のシステムでは、大空間の換気を行う
のに制御が複雑になるばかりでなく、コストアツ
プになるという不具合があつた。
However, in conventional systems, when the indoor ventilation area is shared between multiple ventilation devices and the dust concentration in the room is made uniform, a dust detector is installed in each ventilation area, and the detection output of each dust detector is The operation of each ventilation system was controlled based on the following. For this reason, conventional systems not only have complicated control when ventilating large spaces, but also have the disadvantage of increasing costs.
そこで、本発明の課題は、室内の換気領域のう
ち特定領域の汚染物質濃度を検出するのみで特定
換気領域以外の換気領域を含めて室内全体の汚染
物質濃度を均一にすることである。 Therefore, an object of the present invention is to make the concentration of pollutants uniform throughout the room, including ventilation areas other than the specific ventilation area, by only detecting the concentration of pollutants in a specific area among the ventilation areas in the room.
本発明は、第５図に示すように、室内の換気領
域を複数域に分割し、各換気領域に設けられた換
気装置でそれぞれ換気を行うものにおいて、
特定の換気領域の空気中に含まれる汚染物質濃
度を検出する検出器と、
この検出器の検出値に基づいて特定換気領域の
汚染物質濃度を一定値にする換気量を求め、その
換気量を達成するように特定換気領域の換気装置
を作動させる特定領域換気量設定手段と、
特定換気領域以外の残りの換気領域の汚染物質
濃度を特定換気領域のそれと等しくするために必
要な換気量を、特定換気領域の換気量を基準とし
た指数として予め求め設定する指数設定手段と、
特定領域換気量設定手段において求められた換
気量と指数設定手段において設定されている指数
とから特定換気領域以外の換気領域の換気量を求
め、その換気量を達成するように特定換気領域以
外の領域の換気装置を作動させる一般領域換気量
設定手段と、
を備えるものである。
As shown in FIG. 5, the present invention divides an indoor ventilation area into a plurality of areas and performs ventilation with a ventilation device installed in each ventilation area. A detector that detects the concentration of pollutants, and a ventilation amount that maintains the concentration of pollutants in a specific ventilation area at a constant value based on the detected value of this detector, and a ventilation system for the specific ventilation area to achieve that ventilation amount. A specific area ventilation rate setting means for activating the specific ventilation area, and a ventilation rate required to equalize the pollutant concentration in the remaining ventilation areas other than the specific ventilation area with that of the specific ventilation area, based on the ventilation rate of the specific ventilation area. The ventilation volume in ventilation areas other than the specific ventilation area is determined from the index setting means that is determined and set in advance as an index, the ventilation volume determined by the specific area ventilation volume setting means, and the index set in the index setting means, and the ventilation and a general area ventilation amount setting means for operating ventilation equipment in areas other than the specific ventilation area so as to achieve the specified ventilation amount.
本発明によれば、特定換気領域の汚染物質濃度
を検出器によつて検出し、その検出値に基づいて
特定換気領域の換気量を求めて換気装置を作動さ
せることによつて特定換気領域の汚染物質濃度を
一定値に換気することができる。一方、特定換気
領域以外の領域の換気量については特定換気領域
の換気量と指数設定手段により設定された指数と
から設定され、その換気量で換気装置を作動させ
ることによつてその領域の汚染物質濃度を特定換
気領域のそれと等しくすることができる。従つ
て、特定換気領域以外の換気領域の換気量につい
ては特定換気領域の換気量を基準とした指数を予
め設定しておくことによつて各換気領域毎に検出
器を設定して汚染物質濃度をそれぞれ検出しなく
ても全ての領域の汚染物質濃度を設定した一定値
に換気することができる。
According to the present invention, the concentration of pollutants in a specific ventilation area is detected by a detector, the ventilation amount in the specific ventilation area is determined based on the detected value, and the ventilation system is operated. It is possible to ventilate the pollutant concentration to a constant value. On the other hand, the ventilation amount in areas other than the specific ventilation area is set from the ventilation amount in the specific ventilation area and the index set by the index setting means, and by operating the ventilation device with that ventilation amount, the area will be contaminated. The substance concentration can be made equal to that of the specified ventilation area. Therefore, for the ventilation volume in ventilation areas other than the specific ventilation area, by setting an index based on the ventilation volume in the specific ventilation area in advance, it is possible to set a detector for each ventilation area and measure the pollutant concentration. It is possible to ventilate the contaminant concentration in all areas to a set constant value without detecting each.
以下、図面に基づいて本発明の好適な実施例を
説明する。
Hereinafter, preferred embodiments of the present invention will be described based on the drawings.
第１図乃至第４図には、本発明の好適な実施例
の構成が示されている。 1 to 4 show the configuration of a preferred embodiment of the present invention.
本実施例は、室１０内の５つに分割された換気
領域を５台の換気装置１２，１４，１６，１８，
２０で分担して換気するように構成されている。
各換気装置１２〜２０は、ダクト２１ａ〜２１
ｅ、除塵用のフイルタを含む排風機２３ａ〜２３
ｅ（２３ｂ，２３ｄは図示省略）、フアン２２ａ〜
２２ｅ等を有し、各ダクトの排気吸込口２４には
吸込面積を任意に設定するボユームダンパ２６が
配設されている（一部のみ図示）。そして、各排
気吸込口２４から室１０内の空気が取り入れら
れ、その流量がボリユームダンパ２６の吸込面積
調整によつて調整される。各ダクトに取り入れら
れた空気は排風機２３ａ〜２３ｅ、フアン２２ａ
〜２２ｅを介して室１０外へ排出されるように構
成されている。 In this embodiment, a ventilation area divided into five parts in a room 10 is divided into five ventilation devices 12, 14, 16, 18,
The ventilation is divided into 20 parts.
Each ventilation device 12-20 has ducts 21a-21
e, exhaust fans 23a to 23 including dust removal filters;
e (23b, 23d not shown), fan 22a~
22e, etc., and a volume damper 26 for arbitrarily setting the suction area is disposed at the exhaust suction port 24 of each duct (only a portion is shown). Air in the chamber 10 is taken in from each exhaust suction port 24, and its flow rate is adjusted by adjusting the suction area of the volume damper 26. The air taken into each duct is supplied by exhaust fans 23a to 23e and fan 22a.
22e to the outside of the chamber 10.
特定換気領域に設置されている換気装置１６の
ダクト２１ｃの管路途中には、第１図に示されて
いるように、分岐管３０が分岐接続されており、
この分岐管３０には粉塵濃度検出器３２が設けら
れている。すなわち、室１０の換気領域のうち換
気装置１６が配設された特定換気領域の粉塵濃度
を粉塵濃度検出器３２によつて検出し、この検出
値に基づいて室１０内の粉塵濃度を一定値にする
ための各換気領域の換気量を制御装置３４内で算
出し、この算出値に従つた換気量で各換気装置１
２〜２０を運転する構成が採用されている。 As shown in FIG. 1, a branch pipe 30 is branched and connected in the middle of the duct 21c of the ventilation device 16 installed in the specific ventilation area.
This branch pipe 30 is provided with a dust concentration detector 32 . That is, the dust concentration in a specific ventilation area where the ventilation device 16 is installed among the ventilation areas of the room 10 is detected by the dust concentration detector 32, and based on this detected value, the dust concentration in the room 10 is set to a constant value. The ventilation volume of each ventilation area is calculated within the control device 34, and each ventilation device 1 is operated with the ventilation volume according to this calculated value.
A configuration in which 2 to 20 units are operated is adopted.
制御装置３４は、第４図に示されているように
Ｖ／Ｉ変換器３６、粉塵濃度−風量演算器３８、
送風機風量設定器４０から構成されており、粉塵
濃度を電圧信号で出力する粉塵濃度検出器３２の
出力信号がＶ／Ｉ変換器３６に供給され、ここで
電流信号に変換された後、Ｖ／Ｉ変換器３６の出
力信号は粉塵濃度−風量演算器３８に供給され
る。粉塵濃度−風量演算器３８においては、Ｖ／
Ｉ変換器３６の出力信号に基づいて特定換気領域
の粉塵濃度を予め決められた一定値とする風量
（換気量）が演算され、送風機風量設定器４０は、
粉塵濃度−風量演算器３８からの演算値および後
述の指数に基づいて各換気領域の換気装置毎の排
気風量に対した値を演算して設定する。そして、
この設定信号は送風機翼角設定器４２ａ〜４２ｅ
に供給される。なお、各換気装置１２〜２０の送
風機翼角設定器４２ａ〜４２ｅは、送風機風量設
定器４０の風量設定信号に基づいてフアン２２ａ
〜２２ｅの翼角を設定するように構成されてい
る。 As shown in FIG. 4, the control device 34 includes a V/I converter 36, a dust concentration/air volume calculator 38,
The output signal of the dust concentration detector 32, which is composed of a blower air volume setting device 40 and outputs the dust concentration as a voltage signal, is supplied to the V/I converter 36, where it is converted into a current signal, and then converted into a V/I converter. The output signal of the I converter 36 is supplied to a dust concentration/air volume calculator 38. In the dust concentration-air volume calculator 38, V/
Based on the output signal of the I converter 36, the air volume (ventilation volume) that makes the dust concentration in the specific ventilation area a predetermined constant value is calculated, and the blower air volume setting device 40:
A value is calculated and set for the exhaust air volume of each ventilation device in each ventilation area based on the calculated value from the dust concentration/air volume calculator 38 and an index described below. and,
This setting signal is transmitted to the blower blade angle setting devices 42a to 42e.
supplied to Note that the blower blade angle setters 42a to 42e of the respective ventilation devices 12 to 20 adjust the fan 22a based on the air volume setting signal of the blower air volume setter 40.
It is configured to set a blade angle of ~22e.
上述のようにフアン２２ａ〜２２ｅの翼角を設
定するに際しては、室１０内の粉塵濃度を一定値
にするために、送風機風量設定器４０において、
換気装置１６が設置された特定換気領域の排気風
量の指数を1.0としたとき、換気装置１２，１４，
１８，２０の各排気風量の指数は室１０内の環境
を考慮して例えば0.4、0.7、0.8、0.5とされてい
る。これは、各換気領域によつて基準濃度になる
ように換気するために必要な換気量が相違するこ
とを予め考慮してしている。 When setting the blade angles of the fans 22a to 22e as described above, in order to keep the dust concentration in the room 10 at a constant value, the blower air volume setting device 40
When the exhaust air volume index of the specific ventilation area where the ventilation device 16 is installed is set to 1.0, the ventilation devices 12, 14,
The exhaust air volume indices 18 and 20 are, for example, 0.4, 0.7, 0.8, and 0.5 in consideration of the environment inside the room 10. This is done in consideration of the fact that the amount of ventilation required to achieve the standard concentration differs depending on the ventilation area.
この指数の設定は、例えば、次のようにして行
われる。勿論この作業は、一度行えば粉塵の発生
条件が変わらないかぎり繰り返し行う必要はな
い。 Setting of this index is performed, for example, as follows. Of course, once this operation is performed, it is not necessary to repeat it unless the dust generation conditions change.
各換気装置１２〜２０を運転した状態で、各換
気装置１２〜２０が設置された各換気領域の粉塵
濃度を粉塵濃度検出器３２とは別の粉塵濃度計
（図示せず）を用いてそれぞれ測定する。この測
定は、室１０内での粉塵濃度の分布状態が判る程
度の点数密度で行われる。そして各測定値を基に
各換気領域の粉塵濃度が予め設定された一定値と
なるように、各ボリユームダンパ２６の吸込面
積、フアン２２ａ〜２２ｅの排気風量を調整し、
このときの排気風量から各換気装置１２〜２０の
指数設定用排気風量を設定する。次に特定換気領
域の換気装置１６の指数設定用排気風量を基準
（指数1.0）として残りの換気装置１２，１４，１
８，２０の排気風量指数を求める。 While each ventilation device 12 to 20 is in operation, the dust concentration in each ventilation area where each ventilation device 12 to 20 is installed is measured using a dust concentration meter (not shown) that is different from the dust concentration detector 32. Measure. This measurement is performed at a point density that allows the distribution of dust concentration within the chamber 10 to be determined. Then, based on each measurement value, the suction area of each volume damper 26 and the exhaust air volume of the fans 22a to 22e are adjusted so that the dust concentration in each ventilation area becomes a preset constant value,
The exhaust air volume for index setting of each ventilation device 12 to 20 is set from the exhaust air volume at this time. Next, using the index setting exhaust air volume of the ventilation device 16 in the specific ventilation area as the standard (index 1.0), the remaining ventilation devices 12, 14, 1
Find the exhaust air volume index of 8,20.
なお、ボリユームダンパ２６の吸込面積を調整
する理由は、通常各排気吸込口２４毎に粉塵濃度
が相違するので、濃度の高い領域の吸込口の吸込
面積は大きく、濃度の低い領域の吸込口の吸込面
積は小さくして、換気量を調整するものである。
換言すれば、第２図の室１０において図面の上下
方向の濃度差は、各フアン２２ａ〜２２ｅの排気
風量の調整によつて調整し、図面の左右方向の濃
度差は、各ボリユームダンパ２６の吸込面積の調
整によつて調整して室１０内の粉塵濃度が均一に
なるようにされている。 The reason for adjusting the suction area of the volume damper 26 is that the dust concentration is usually different for each exhaust suction port 24, so the suction area of the suction port in the high concentration area is large, and the suction area of the suction port in the low concentration area is large. The suction area is made small to adjust the amount of ventilation.
In other words, the concentration difference in the vertical direction in the drawing in the chamber 10 in FIG. The dust concentration within the chamber 10 is made uniform by adjusting the suction area.
以上のようにして一旦指数を設定すれば以後
は、換気装置１６の設置されている特定の換気領
域の粉塵濃度のみを粉塵濃度検出器３２により検
出し、粉塵濃度−風量演算器３８ではこの検出値
から特定換気領域の粉塵濃度を一定値とするため
の換気量を求め、送風機風量設定器４０ではこの
換気量に適合するフアン２２ｃの翼角を設定する
とともに、特定換気領域以外の換気領域の換気装
置の排気風量は、特定換気領域の換気量と上述の
排気風量指数とからそれぞれ求められ、換気装置
１２，１４，１８，２０のフアン２２ａ，２２
ｂ，２２ｄ，２２ｅの翼角も設定される。 Once the index is set as described above, the dust concentration detector 32 detects only the dust concentration in a specific ventilation area where the ventilation system 16 is installed, and the dust concentration-air volume calculator 38 detects this detection. Based on the value, the ventilation amount to keep the dust concentration in the specific ventilation area at a constant value is determined, and the blower air volume setting device 40 sets the blade angle of the fan 22c that matches this ventilation amount, and also sets the blade angle of the fan 22c to match this ventilation amount. The exhaust air volume of the ventilation system is determined from the ventilation volume of the specific ventilation area and the above-mentioned exhaust air volume index, and
The blade angles of b, 22d, and 22e are also set.
このように各フアン２２ａ〜２２ｅの翼角を制
御して各換気装置１２〜２０を運転すると、粉塵
濃度が比較的低い領域（換気装置１２，２０が設
置されている領域）は他の領域（換気装置１４，
１６，１８が設置されている領域）よりも少ない
換気量で換気され、他の領域は低濃度領域よりも
換気風量指数が大きい分だけ多い換気量で換気さ
れる。すなわち、換気装置１２〜２０は、全体で
室１０内の粉塵濃度を一定値にする換気量で運転
される。 When the ventilation devices 12 to 20 are operated by controlling the blade angles of the fans 22a to 22e in this way, the area where the dust concentration is relatively low (the area where the ventilation devices 12 and 20 are installed) is replaced by the other area ( ventilation system 14,
16 and 18)), and other areas are ventilated with a ventilation volume that is higher than the low concentration area by the amount of ventilation air volume index. That is, the ventilation devices 12 to 20 are operated with a ventilation amount that makes the dust concentration in the room 10 a constant value as a whole.
このように本実施例においては、特定の換気領
域のみの粉塵濃度を検出し、この検出値に基づい
て各領域の換気量も制御する。すなわち、特定領
域以外の換気領域については検出器を設置する代
わりに指数を予め電気的に記憶設定しておくこと
で、それぞれ検出器を設置した場合と同等に室内
の粉塵濃度が均一になるように換気を行うことが
できる。従つて、各領域毎の粉塵濃度を検出する
システムよりも構成を簡単にすることができ、し
かもコストも低減することができる。 In this manner, in this embodiment, the dust concentration in only a specific ventilation area is detected, and the ventilation amount in each area is also controlled based on this detected value. In other words, instead of installing detectors in ventilation areas other than specific areas, by storing the index electrically in advance, it is possible to make the dust concentration in the room as uniform as if a detector was installed in each area. Ventilation can be provided. Therefore, the configuration can be simpler than a system that detects the dust concentration in each area, and the cost can be reduced.
なお、フアン２２ａ〜２２ｅは可変翼軸流型の
ものであり、また、分岐管３０に導入された空気
は粉塵濃度検出器３２、フアン４６を介して室１
０内またはダクト２１ｃ内へ排出される。 The fans 22a to 22e are of variable blade axial flow type, and the air introduced into the branch pipe 30 is sent to the chamber 1 via the dust concentration detector 32 and the fan 46.
0 or into the duct 21c.
本発明によれば、検出器は特定換気領域用のみ
で良いため構成が簡単となり、コストも安いもの
とすることができる。
According to the present invention, since the detector is only needed for a specific ventilation area, the configuration can be simplified and the cost can be reduced.
第１図〜第４図は本発明の一実施例を示し、第
１図は制御装置周辺の要部構成図、第２図は全体
構成図、第３図は換気装置の要部構成図、第４図
は制御装置の内部構成説明図である。また、第５
図は本発明の構成を示すブロツク図である。
１０……室、１２，１４，１６，１８，２０…
…換気装置、２１ａ〜２１ｅ……ダクト、２２ａ
〜２２ｅ……フアン、３２……粉塵濃度検出器
（検出器）、３４……制御装置、３８……粉塵濃度
−風量演算器（特定領域換気量設定手段）、４０
……送風機風量設定器（特定領域換気量設定手
段、指数設定手段、一般領域換気量設定手段）、
４２ａ〜４２ｅ……送風機翼角設定器。
1 to 4 show an embodiment of the present invention, FIG. 1 is a configuration diagram of the main parts around the control device, FIG. 2 is an overall configuration diagram, and FIG. 3 is a configuration diagram of the main parts of the ventilation system. FIG. 4 is an explanatory diagram of the internal configuration of the control device. Also, the fifth
The figure is a block diagram showing the configuration of the present invention. 10...room, 12, 14, 16, 18, 20...
...Ventilation system, 21a-21e...Duct, 22a
~22e...Fan, 32...Dust concentration detector (detector), 34...Control device, 38...Dust concentration-air volume calculator (specific area ventilation amount setting means), 40
...Blower air volume setting device (specific area ventilation rate setting means, index setting means, general area ventilation rate setting means),
42a to 42e...Blower blade angle setting device.
Claims (1)
域に設けられた換気装置でそれぞれ換気を行うも
のにおいて、 特定の換気領域の空気中に含まれる汚染物質濃
度を検出する検出器と、 この検出器の検出値に基づいて前記特定換気領
域の汚染物質濃度を一定値にする換気量を求め、
その換気量を達成するように前記特定換気領域の
換気装置を作動させる特定領域換気量設定手段
と、 前記特定換気領域以外の残りの換気領域の汚染
物質濃度を特定換気領域のそれと等しくするため
に必要な換気量を、前記特定換気領域の換気量を
基準とした指数として予め求め設定する指数設定
手段と、 前記特定領域換気量設定手段において求められ
た換気量と前記指数設定手段において設定されて
いる指数とから特定換気領域以外の換気領域の換
気量を求め、その換気量を達成するように特定換
気領域以外の領域の換気装置を作動させる一般領
域換気量設定手段と、 を備える換気装置。[Claims] 1. In a device that divides a ventilation area in a room into multiple areas and performs ventilation with a ventilation device installed in each ventilation area, the concentration of pollutants contained in the air in a specific ventilation area is detected. a detector for determining the ventilation amount to keep the pollutant concentration in the specific ventilation area at a constant value based on the detected value of the detector;
specific area ventilation rate setting means for operating a ventilation device in the specific ventilation area to achieve the ventilation rate; and for making the pollutant concentration in the remaining ventilation area other than the specific ventilation area equal to that in the specific ventilation area. index setting means for predetermining and setting the required ventilation amount as an index based on the ventilation amount of the specific ventilation area; A ventilation system comprising: a general area ventilation setting means for determining the ventilation volume of a ventilation area other than the specific ventilation area from the index and operating the ventilation system of the area other than the specific ventilation area so as to achieve the ventilation volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11283984A JPS60256738A (en) | 1984-06-01 | 1984-06-01 | Ventilation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11283984A JPS60256738A (en) | 1984-06-01 | 1984-06-01 | Ventilation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60256738A JPS60256738A (en) | 1985-12-18 |
| JPH042853B2 true JPH042853B2 (en) | 1992-01-21 |
Family
ID=14596820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11283984A Granted JPS60256738A (en) | 1984-06-01 | 1984-06-01 | Ventilation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60256738A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6200663B2 (en) * | 2013-03-11 | 2017-09-20 | 三菱電機株式会社 | Ventilation system |
-
1984
- 1984-06-01 JP JP11283984A patent/JPS60256738A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60256738A (en) | 1985-12-18 |
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