JPH07103559A - Damper of duct for air-conditioning - Google Patents

Damper of duct for air-conditioning

Info

Publication number
JPH07103559A
JPH07103559A JP27007393A JP27007393A JPH07103559A JP H07103559 A JPH07103559 A JP H07103559A JP 27007393 A JP27007393 A JP 27007393A JP 27007393 A JP27007393 A JP 27007393A JP H07103559 A JPH07103559 A JP H07103559A
Authority
JP
Japan
Prior art keywords
opening
damper
air
closing
plate
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
Application number
JP27007393A
Other languages
Japanese (ja)
Inventor
Tomio Yanagimoto
東海男 柳本
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP27007393A priority Critical patent/JPH07103559A/en
Publication of JPH07103559A publication Critical patent/JPH07103559A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To simplify equipment work by a method wherein a flexible damper body of the shutter structure is formed by connecting narrow, long plate materials parallel to one another, air passage-openings are formed in the plate materials, opening and closing plates are mounted on them and the damper body and the opening and closing plates are closed with a locking mechanism. CONSTITUTION:A duct body 2 for opening and closing the air passage 11 of an air conditioning duct 1 consists of narrow, long plate materials 21 connected parallel to one another in a manner flexible and similar to a house shutter. Each plate material 21 has a separate air passage opening 22 and a lid-like opening and closing plate 23 is provided above each air passage opening 22 in such a manner that the plate 23 can freely open and close the air passage opening 22. A small hole 233 is formed in the opening and closing end 232 of the opening and closing plate 23 and a wire 6 having an engaging piece 7 is passed through the hole to open and close the plate 23. By winding and unwinding a chain 5 by a driving motor, the raising and lowering operation of the damper body 2 is locked into specific range and, in case of emergency, the locking is released and the wire 6 is dropped to close and lock the air passage opening 22.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、空調用ダクトのダン
パに関する。さらに詳しくは、筒形の空調用ダクトに設
備され、火災等の発生時にダクトの内部の通風路を閉鎖
しダクトを通じて炎、煙が広がるのを阻止するための空
調用ダクトのダンパの製造コスト等に係る改良に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper for an air conditioning duct. More specifically, it is installed in a cylindrical air-conditioning duct, and in the event of a fire, etc., the air-conditioning duct damper is closed to close the ventilation passages inside the duct and prevent flames and smoke from spreading through the duct. Related to improvements.

【0002】[0002]

【従来の技術】従来、空調用ダクトのダンパとしては、
例えば、1枚または複数枚の開閉板をヒンジ、バネ等を
介して取付フレームに取り付け、筒形の空調用ダクトの
内側面に固定してなるものが知られている。
2. Description of the Related Art Conventionally, as a damper for an air conditioning duct,
For example, it is known that one or a plurality of opening / closing plates are attached to an attachment frame via a hinge, a spring or the like and fixed to the inner surface of a tubular air conditioning duct.

【0003】この従来の空調用ダクトのダンパは、平常
時にはロック機構により開閉板を開放保持しておき、火
災等の非常時にはロック機構を解除して開閉板を閉鎖保
持するようになっている。
In this conventional air conditioner duct damper, the opening / closing plate is held open by a locking mechanism in normal times, and the locking mechanism is released to hold the opening / closing plate closed in an emergency such as a fire.

【0004】このような従来の空調用ダクトのダンパで
は、通常施行現場で空調用ダクトの形状、大きさ等に応
じて鋼板等から開閉板を切断形成してひんじ、バネ等に
より取付フレームに組付けることが行われるため、設備
工作に非常に手間がかかり、設備コストがかさんでしま
うという問題点がある。
In such a conventional damper for an air-conditioning duct, an opening / closing plate is cut and formed from a steel plate or the like according to the shape and size of the air-conditioning duct at a normal working site, and a hinge or a spring is used as a mounting frame. Since the assembly is performed, there is a problem that it takes a lot of time and labor for the equipment work and the equipment cost increases.

【0005】[0005]

【発明が解決しょうとする課題】本発明は、前述の問題
点を考慮してなされたもので、設備コストの安価な空調
用ダクトのダンパを提供することを課題とする。
SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a damper for an air-conditioning duct which is inexpensive in equipment cost.

【0006】[0006]

【課題を解決するための手段】前述の課題を解決するた
め、本発明に係る空調用ダクトのダンパは、次のような
手段を採用する。
In order to solve the above-mentioned problems, the damper of the air conditioning duct according to the present invention adopts the following means.

【0007】すなわち請求項1では、筒形の空調用ダク
トの内部の通風路を開閉する空調用ダクトのダンパにお
いて、細長形の板材が並列連結されたフレキシブルなシ
ャッタ構造のダンパ本体と、ダンパ本体の各板材に開口
された通風路と、通風路を開閉する開閉板と、ダンパ本
体および開閉板を閉鎖させるロック機構と、を備えたこ
とを特徴とする。
That is, according to the first aspect of the present invention, in a damper for an air conditioning duct that opens and closes an air passage inside a tubular air conditioning duct, a damper main body having a flexible shutter structure in which elongated plate members are connected in parallel, and a damper main body. And a lock mechanism for closing the damper main body and the opening / closing plate.

【0008】また請求項2では、請求項1の空調用ダク
トのダンパにおいて、ダンパ本体に通風路、開閉板の設
けられていない盲部を設けて通風路を昇降可能にし、盲
部のみで通風路を閉鎖可能にしたことを特徴とする。
According to a second aspect of the present invention, in the damper for an air-conditioning duct according to the first aspect, the damper main body is provided with an air passage and a blind portion without an opening / closing plate so that the air passage can be moved up and down. The feature is that the road can be closed.

【0009】[0009]

【作用】前述の手段によると、請求項1では、ダンパ本
体がシャッタ構造であるため既存のシャッタを利用する
ことができ、しかもそのフレキシブル性を利用して異な
る形状、大きさの空調用ダクトに極めて容易に対応する
ことができる。さらにダンパ本体の各板材に重なる開閉
板自体が同じくシャッタ本体の各板材を利用してダンパ
本体の各板材に開閉自在に取り付けることができる。こ
のため、設備工作に手間がかからなくなり、設備コスト
の安価な空調用ダクトのダンパを提供するという課題が
解決されることになる。
According to the above-mentioned means, according to the first aspect, since the damper main body has the shutter structure, the existing shutter can be used, and the flexibility of the damper allows the air-conditioning ducts of different shapes and sizes to be used. It can be handled very easily. Further, the opening / closing plate itself, which overlaps each plate member of the damper body, can be attached to each plate member of the damper body so as to be openable and closable by utilizing each plate member of the shutter body. For this reason, it is possible to solve the problem of providing a damper for an air conditioning duct that requires less equipment cost and requires less equipment cost.

【0010】また請求項2では、平常時請求項1の作用
を享受しているが、非常時にはロック機構を解除して閉
鎖性の高い盲部まで出して落すことにより、通風路の閉
鎖に万全を期すことができる。
In the second aspect, the operation of the first aspect is normally enjoyed. However, in an emergency, the lock mechanism is released and the blind portion having a high closing property is brought out and dropped to completely close the ventilation passage. Can be expected.

【0011】[0011]

【実施例】以下、本発明に係る空調用ダクトのダンパの
実施例を図面に基いて説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a damper for an air conditioning duct according to the present invention will be described below with reference to the drawings.

【0012】図1〜図4は、本発明に係る空調用ダクト
のダンパの第1実施例を示すものである。
1 to 4 show a first embodiment of a damper for an air conditioning duct according to the present invention.

【0013】この実施例の空調用ダクト1は、金属薄板
等で角筒形に形成され、上壁12、側壁13、下壁14
で囲まれる内部空間が空調用の熱風、冷風が通過する通
風路11となっている。また、この空調用ダクト1の上
壁12、側壁13、下壁14の外側には、グラスウール
等の断熱材3が被せられている。
The air-conditioning duct 1 of this embodiment is formed of a thin metal plate or the like into a rectangular tube shape, and has an upper wall 12, a side wall 13, and a lower wall 14.
An internal space surrounded by is an air passage 11 through which hot and cold air for air conditioning passes. Further, the outer walls of the upper wall 12, the side wall 13, and the lower wall 14 of the air conditioning duct 1 are covered with a heat insulating material 3 such as glass wool.

【0014】空調用ダクト1の通風路11を開閉するダ
ンパ本体2は、主に多数枚の細長形の板材21が並列連
結されてフレキシブルに形成され、家屋のシャッタのよ
うな構造となっている。このダンパ本体2は、空調用ダ
クト1の上壁12、下壁14の間隔(高さ)よりも少し
長いものを用い、空調用ダクト1の上壁12の外側に設
けたドラム4に捲回してあるチェーン5により巻上収納
されるようになっている。
The damper body 2 which opens and closes the ventilation passage 11 of the air conditioning duct 1 is mainly formed by connecting a number of elongated plate members 21 in parallel and formed flexibly, and has a structure like a shutter of a house. . The damper main body 2 is a little longer than the space (height) between the upper wall 12 and the lower wall 14 of the air conditioning duct 1, and is wound around the drum 4 provided outside the upper wall 12 of the air conditioning duct 1. It is adapted to be wound up and stored by the chain 5.

【0015】ダンパ本体2の各板材21各々には通風口
22が開口されている。さらにこれら通風口22には、
図3に示すように、通風口22を開閉できる蓋のような
開閉板23が、通風口22の上方に溶接固着された湾曲
した支持片24を介して開閉可能に支持されている。開
閉板23は、基端231が支持片24の湾曲に噛合うよ
うな湾曲形に形成され、支持片24に開閉可能に支持さ
れている。また、開閉板23の開閉端232には、ワイ
ア6が挿通される小孔233が開孔され、このワイヤ6
の一端は開閉板23を開閉駆動するベビーウインチ、モ
ータ等(図示せず)に連結されている。ワイヤ6には、
図4に示すように、開閉板23の小孔233よりも少し
大きな係止片7が取付けられ、係止片7を小孔233の
周縁に引っ掛けて持ち上げることにより開閉板23を開
放することができるようになっている。このため製造工
作にかかる手間を格段に節約でき、設備コストを安価に
すむませることができる。
A ventilation port 22 is formed in each of the plate members 21 of the damper body 2. Furthermore, in these ventilation ports 22,
As shown in FIG. 3, an opening / closing plate 23 such as a lid that can open and close the ventilation opening 22 is supported so as to be openable and closable via a curved support piece 24 that is welded and fixed above the ventilation opening 22. The opening / closing plate 23 is formed in a curved shape such that the base end 231 meshes with the bending of the support piece 24, and is supported by the support piece 24 so as to be openable and closable. In addition, a small hole 233 through which the wire 6 is inserted is opened at the open / close end 232 of the open / close plate 23.
One end of is connected to a baby winch, a motor or the like (not shown) that drives the opening and closing plate 23 to open and close. Wire 6
As shown in FIG. 4, a locking piece 7 that is slightly larger than the small hole 233 of the opening / closing plate 23 is attached, and the opening / closing plate 23 can be opened by hooking the locking piece 7 on the peripheral edge of the small hole 233 and lifting it. You can do it. Therefore, the labor required for the manufacturing work can be remarkably reduced, and the equipment cost can be reduced.

【0016】ダンパ本体2に接続したチェーン5が捲回
されるドラム4には、ダンパ本体2を昇降させる駆動モ
ータ8が接続され、この駆動モータ8には、平常時、ダ
ンパ本体2の昇降を一定範囲にロックすると共に、火災
等の非常時には該ロックを解除して常にダンパ本体2を
降下させ、かつ、ワイヤ6を落とさせて通風口22を閉
鎖するロック機構を有している。ロック機構は、駆動モ
ータ8の駆動を制御するコントローラ9と、煙、熱、火
等を検出するセンサ10とからなる。このコントローラ
9には、少なくとも、センサ10により火災等の非常が
検出されたとき、駆動モータ8を回転させてダンパ本体
2を繰り出し、また、ワイヤ6の引き上げを解除するこ
とができるように設定されている。あるいはロック機構
は、ダンパ本体2に取り付けた熱に溶けるヒューズとし
ておいてもよい。
A drive motor 8 for raising and lowering the damper body 2 is connected to the drum 4 around which the chain 5 connected to the damper body 2 is wound, and the drive motor 8 is used for raising and lowering the damper body 2 in normal times. It has a lock mechanism that locks within a certain range, releases the lock in an emergency such as a fire, and always lowers the damper main body 2, and drops the wire 6 to close the ventilation port 22. The lock mechanism includes a controller 9 that controls the drive of the drive motor 8 and a sensor 10 that detects smoke, heat, fire, and the like. The controller 9 is set so that at least when an emergency such as a fire is detected by the sensor 10, the drive motor 8 is rotated to extend the damper main body 2 and release of the wire 6 is released. ing. Alternatively, the lock mechanism may be a fuse that is attached to the damper body 2 and melts with heat.

【0017】空調用ダクト1の側壁13、下壁14の内
側には、ダンパ本体2の昇降を案内する昇降ガイド20
が設けられている。この昇降ガイド20は、空調用ダク
ト1の側壁13、下壁14に沿って僅かに突出した溝形
に形成され、上下の上壁12、下壁14付近で湾曲して
ダンパ本体2の昇降を円滑にすると共に、ダンパ本体2
の長さの調整を可能にしている。
Inside the side wall 13 and the lower wall 14 of the air conditioning duct 1, an elevating guide 20 for guiding the elevating and lowering of the damper body 2 is provided.
Is provided. The elevating guide 20 is formed in a groove shape slightly protruding along the side wall 13 and the lower wall 14 of the air conditioning duct 1, and is curved near the upper and lower upper walls 12 and 14 to elevate the damper main body 2. Smooth and the damper body 2
It is possible to adjust the length of.

【0018】このような実施例によると、構造的に極め
て簡素である。ダンパ本体2については、既存のシャッ
タを利用することができ、しかもそのフレキシブル性に
より空調用ダクト1の高さに自在に対応することができ
る。というのは上項0017で述べたように、昇降ガイ
ド20を通風路11の高さより長く設けておき、その長
すぎる余分な部分は昇降ガイド20内に収めておくこと
ができるからである。このため設備工作に手間が係らな
くなり、設備コストが安価にすむ。
According to such an embodiment, the structure is extremely simple. An existing shutter can be used for the damper main body 2, and the flexibility of the damper main body 2 allows the height of the air conditioning duct 1 to be freely adjusted. This is because, as described in the above paragraph 0017, the elevating guide 20 can be provided longer than the height of the ventilation passage 11 and an excessively long portion can be stored in the elevating guide 20. For this reason, the labor for the equipment work is eliminated, and the equipment cost can be reduced.

【0019】そして、設備された状態においては、通常
時には、ダンパ本体2を昇降させるか、あるいはダンパ
本体2は降下させた状態で開閉板22cを開閉すること
により、空調用ダクト1の通風路11を通過する風量を
かなり精密に調整することができる。また、火災等の非
常時には、ダンパ本体2が降下すると共に開閉板23が
通風口22を閉鎖し、空調用ダクト1の通風路11を完
全に閉鎖することができる。従って、設備1箇所におい
て防火と風量調整との両機能を奏することができる。
In the installed state, in normal times, the damper main body 2 is moved up and down, or the damper main body 2 is lowered to open and close the opening / closing plate 22c to open the ventilation passage 11 of the air conditioning duct 1. The amount of air passing through can be adjusted quite precisely. Further, in the event of an emergency such as a fire, the damper main body 2 can be lowered and the opening / closing plate 23 can close the ventilation port 22 to completely close the ventilation passage 11 of the air conditioning duct 1. Therefore, it is possible to perform both the fire prevention function and the air volume adjustment function at one location of the facility.

【0020】図5は、本発明に係る空調用ダクトのダン
パの第2実施例を示すものである。
FIG. 5 shows a second embodiment of a damper for an air conditioning duct according to the present invention.

【0021】この実施例のダンパ本体2は、空調用ダク
ト1の上壁12、下壁14の間隔の2倍よりも少し長く
形成されている。そして、ダンパ本体2のチェーン5側
の略半分長は、通風口22、開閉板23が設けられてい
ない盲部25となっている。
The damper body 2 of this embodiment is formed to be slightly longer than twice the distance between the upper wall 12 and the lower wall 14 of the air conditioning duct 1. A substantially half length of the damper main body 2 on the side of the chain 5 is a blind portion 25 where the ventilation port 22 and the opening / closing plate 23 are not provided.

【0022】このような実施例によると、火災等が激し
く火災等によって開閉板23が煽られてしまうような状
態には、盲部25で空調用ダクト1の通風路11を閉鎖
することにより、火炎、煙等の漏洩をより完全に防止す
ることができる。なお、盲部25で空調用ダクト1の通
風路11を閉鎖するモータ8の駆動は、ロック機構で自
動制御する。
According to such an embodiment, in a situation where a fire or the like is severe and the opening / closing plate 23 is fanned by the fire or the like, by closing the ventilation passage 11 of the air conditioning duct 1 with the blind portion 25, It is possible to more completely prevent the leakage of flames, smoke, and the like. The drive of the motor 8 that closes the ventilation passage 11 of the air conditioning duct 1 by the blind portion 25 is automatically controlled by the lock mechanism.

【0023】以上、図示した実施例の外に、前記コント
ローラ9、センサ10を設けず、駆動モータ8をビル等
の火災等の非常事態制御システムに接続する実施例とす
ることもできる。
In addition to the illustrated embodiment, the controller 9 and the sensor 10 may not be provided, and the drive motor 8 may be connected to an emergency control system such as a fire in a building or the like.

【0024】さらに、駆動モータ8を設けず、前述の制
御をベビーウインチ等による手動ですべて行う実施例と
することも可能である。
Further, it is possible to adopt an embodiment in which the drive motor 8 is not provided and all the above-mentioned controls are manually performed by a baby winch or the like.

【0025】さらに、ダンパ本体2を固定的に設置して
昇降させないようにする実施例とすることも可能であ
る。
Further, it is possible to adopt an embodiment in which the damper main body 2 is fixedly installed so as not to move up and down.

【0026】[0026]

【発明の効果】以上のように本発明に係る空調用ダクト
のダンパは、請求項1、2共通して、既存のシャッタを
利用することでき、したがって異なる横幅、高さの空調
用ダクトに極めて容易に対応することができる。また、
開閉口を蓋する開閉板の取付け工作が既存シャッタの各
板材を利用して極めて容易に行うことができる。これら
により設備工作に手間がかからなく、設備コストが安価
となる効果がある。
As described above, the damper for the air-conditioning duct according to the present invention can utilize the existing shutter in common with claims 1 and 2, and therefore can be applied to the air-conditioning duct having different widths and heights. It can be dealt with easily. Also,
Installation work of the opening / closing plate for covering the opening / closing port can be extremely easily performed by using each plate material of the existing shutter. As a result, there is an effect that the facility work is not troublesome and the facility cost is low.

【0027】さらに請求項1、2に共通して、開閉板に
よって通風路を開閉することによって風量調整を行うこ
とができる効果がある。
Further, in common to the first and second aspects, there is an effect that the air volume can be adjusted by opening and closing the ventilation passage by the opening and closing plate.

【0028】さらに請求項2については、平常時の開閉
板の開閉に加えて非常時にはロック機構が作動して通風
口のある各板材に代わって盲部がダクトの通風路を完全
に閉鎖し、これによって火災拡散をより完全に阻止する
ことができる効果がある。
Further, in addition to the opening and closing of the opening and closing plate in the normal state, the lock mechanism operates in an emergency to replace each plate member with the ventilation port by the blind part to completely close the ventilation path of the duct. This has the effect of preventing the spread of fire more completely.

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

【図1】本発明に係る空調用ダクトのダンパの第1実施
例を示す斜視図である。
FIG. 1 is a perspective view showing a first embodiment of a damper for an air conditioning duct according to the present invention.

【図2】図1の作用状態を示す断面図である。FIG. 2 is a cross-sectional view showing the operating state of FIG.

【図3】図2の要部の拡大断面図である。3 is an enlarged cross-sectional view of a main part of FIG.

【図4】図3の作用状態を示す一部の拡大断面図であ
る。
FIG. 4 is a partial enlarged cross-sectional view showing the operating state of FIG.

【図5】本発明に係る空調用ダクトのダンパの第2実施
例を示す斜視図である。
FIG. 5 is a perspective view showing a second embodiment of the damper of the air conditioning duct according to the present invention.

【符号の説明】[Explanation of symbols]

1 空調用ダクト 11 通風路 2 ダンパ本体 21 板材 22 通風口 23 開閉板 25 盲部 1 Air-conditioning duct 11 Ventilation path 2 Damper main body 21 Plate material 22 Ventilation port 23 Opening / closing plate 25 Blind part

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 筒形の空調用ダクトの内部の通風路を開
閉する空調用ダクトのダンパにおいて、細長形の板材が
並列連結されたフレキシブルなシャッタ構造のダンパ本
体と、ダンパ本体の各板材に開口された通風路と、通風
路を開閉する開閉板と、ダンパ本体および開閉板を閉鎖
させるロック機構と、を備えたことを特徴とする空調用
ダクトのダンパ。
1. A damper body for an air-conditioning duct that opens and closes a ventilation path inside a tubular air-conditioning duct, wherein a damper main body having a flexible shutter structure in which elongated plate materials are connected in parallel and each plate material of the damper body are provided. A damper for an air-conditioning duct, comprising: an open ventilation passage; an opening / closing plate for opening / closing the ventilation passage; and a lock mechanism for closing the damper body and the opening / closing plate.
【請求項2】 請求項1の空調用ダクトのダンパにおい
て、ダンパ本体に通風路、開閉板の設けられていない盲
部を設けて通風路を昇降可能にし、盲部のみで通風路を
閉鎖可能にしたことを特徴とする空調用ダクトのダン
パ。
2. The damper for an air-conditioning duct according to claim 1, wherein the damper body is provided with an air passage and a blind portion not provided with an opening / closing plate so that the air passage can be moved up and down, and the air passage can be closed only by the blind portion. The damper for the air-conditioning duct that is characterized by
JP27007393A 1993-10-01 1993-10-01 Damper of duct for air-conditioning Pending JPH07103559A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27007393A JPH07103559A (en) 1993-10-01 1993-10-01 Damper of duct for air-conditioning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27007393A JPH07103559A (en) 1993-10-01 1993-10-01 Damper of duct for air-conditioning

Publications (1)

Publication Number Publication Date
JPH07103559A true JPH07103559A (en) 1995-04-18

Family

ID=17481152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27007393A Pending JPH07103559A (en) 1993-10-01 1993-10-01 Damper of duct for air-conditioning

Country Status (1)

Country Link
JP (1) JPH07103559A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2846598A1 (en) 2002-10-31 2004-05-07 Sanden Corp Vehicle air conditioning system comprises air duct with several air evacuation orifices opened and closed by plate shaped element able to move longitudinally in duct

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55159091A (en) * 1979-05-25 1980-12-10 Hideo Higashiyama Device for letting light in through venetian shutter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55159091A (en) * 1979-05-25 1980-12-10 Hideo Higashiyama Device for letting light in through venetian shutter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2846598A1 (en) 2002-10-31 2004-05-07 Sanden Corp Vehicle air conditioning system comprises air duct with several air evacuation orifices opened and closed by plate shaped element able to move longitudinally in duct

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