JPH11115459A - Air-conditioning device for vehicle - Google Patents

Air-conditioning device for vehicle

Info

Publication number
JPH11115459A
JPH11115459A JP28816297A JP28816297A JPH11115459A JP H11115459 A JPH11115459 A JP H11115459A JP 28816297 A JP28816297 A JP 28816297A JP 28816297 A JP28816297 A JP 28816297A JP H11115459 A JPH11115459 A JP H11115459A
Authority
JP
Japan
Prior art keywords
differential
air
damper
foot
outlet
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.)
Withdrawn
Application number
JP28816297A
Other languages
Japanese (ja)
Inventor
Masatoshi Mitsui
正俊 三井
Hideto Noyama
英人 野山
Tomoki Hase
知樹 羽瀬
Makoto Fujitani
誠 藤谷
Yuki Izawa
友樹 井澤
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP28816297A priority Critical patent/JPH11115459A/en
Publication of JPH11115459A publication Critical patent/JPH11115459A/en
Withdrawn legal-status Critical Current

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  • Air-Conditioning For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a desirable temperature difference between the differential blow-out temperature and a foot blow-out temperature with a differential/foot mode by arranging a face damper, a differential damper and a foot blow-out port in this order so that the cold air from a bypass passage easily arrives them, and providing a projection inside of a face damper. SOLUTION: A face damper 9, a differential/foot damper 10 and a foot blow- out port are arranged in this order in relation to a flowing direction of the cold air from a bypass passage B. A projection 14 is provided inside of the face damper 9. This projection 14 restrains the excessive flow of the cold air into a differential blow-out port due to the arrangement of the face blow-out port, the differential blow-out port and the foot blow-out port in this order when the differential/foot damper 10 is opened in the condition that the face damper 9 is closed and in the mode of both of the differential/foot. With this structure, direction of the cold air directed to the differential blow-out port is changed so as to promote the mixing of the hot air and the cold air so that the differential temperature comes close to the foot temperature.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は車両用空調装置に関
し、具体的には吹き出し温度特性を要求される特性に近
づけることができる車両用空調装置の構造に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly, to a structure of an air conditioner for a vehicle capable of making blow-off temperature characteristics close to required characteristics.

【0002】[0002]

【従来の技術】現在、多くの自動車には車両用空調装置
(所謂カーエアコン)が装備されている。この車両用空
調装置は、エンジンルーム側に備えられたコンプレッサ
やコンデンサ等からなる部分(所謂室外機)と、車室側
に備えられたエバポレータやヒータコア等からなる部分
(所謂室内機)とを有し、その換気機能や暖房機能や冷
房・除湿機能により、温度、湿度の調節や送風、換気な
どを行って車室内の環境を快適に保つ働きをする。
2. Description of the Related Art At present, many automobiles are equipped with a vehicle air conditioner (so-called car air conditioner). This vehicle air conditioner has a portion (so-called outdoor unit) provided with a compressor and a condenser provided on the engine room side, and a portion (so-called indoor unit) provided with an evaporator and a heater core provided on the vehicle room side. The ventilation, heating, cooling and dehumidification functions control the temperature and humidity, and provide ventilation and ventilation to keep the interior of the vehicle comfortable.

【0003】かかる車両用空調装置にあって、室内機と
しては、例えば図5に示すような一体型の構造のものが
提案されている。
In such an air conditioner for a vehicle, an indoor unit having an integral structure as shown in FIG. 5, for example, has been proposed.

【0004】この図5に示す車両用空調装置(室内機)
の構造は、室内外切換ダンパやブロア(図示省略)と、
その下流側に設けられたエバポレータ1と、このエバポ
レータ1よりも下流側に設けられたヒータ3と、エバポ
レータ1とヒータ3との間にあり往復して開閉するスラ
イド式のエアミックスダンパ2と、ロータリダンパ4
と、ヒータ3を介してモードダンパ4に至る温風通路W
と、ヒータコア3をバイパスして直線ロータリダンパ4
に至るバイパス通路Bと、ロータリダンパ4によって切
り換えられるフェイス、デフ、フットの各吹き出し口
5,6,7とからなる。
A vehicle air conditioner (indoor unit) shown in FIG.
The structure of the indoor and outdoor switching damper and blower (not shown),
An evaporator 1 provided on the downstream side thereof, a heater 3 provided on the downstream side of the evaporator 1, a slide type air mix damper 2 which is located between the evaporator 1 and the heater 3 and reciprocates and opens and closes; Rotary damper 4
And a hot air passage W reaching the mode damper 4 through the heater 3
And a rotary rotary damper 4 bypassing the heater core 3.
, And face, differential, and foot outlets 5, 6, 7, which are switched by the rotary damper 4.

【0005】従って、この車両用空調装置によれば、エ
バポレータ1から出た冷風をエアミックスダンパ2の開
度により温風通路Wとバイパス通路Bとに分流(即ち各
通路B,Wを流れる冷風量と温風量を制御)し、温風通
路Wではヒータ3によって加熱する。そして、ロータリ
ダンパ4の手前で、温風通路Wを流れる温風とバイパス
通路Bを流れる冷風とを混合させ、この混合して温度調
節された空気を、ロータリダンパ4の回動(モード切り
換え)に応じてフェイス吹き出し口5、デフ吹き出し口
6又はフット吹き出し口7の何れか一箇所又は複数箇所
から吹き出す。なお、フェイス吹き出し口5、デフ吹き
出し口6、フット吹き出し口7は、ダクトを介して車室
内のフェイス吹き出し口、デフ吹き出し口、フット吹き
出し口にそれぞれ通じている。
Therefore, according to this vehicle air conditioner, the cold air flowing out of the evaporator 1 is divided into the hot air passage W and the bypass passage B by the opening degree of the air mix damper 2 (that is, the cold air flowing through each passage B, W). The amount and the amount of hot air are controlled), and the heater 3 heats the hot air passage W. Then, just before the rotary damper 4, the hot air flowing through the hot air passage W and the cold air flowing through the bypass passage B are mixed, and the mixed and temperature-adjusted air is rotated by the rotary damper 4 (mode switching). Is blown out from any one or more of the face outlet 5, the differential outlet 6 and the foot outlet 7. The face outlet 5, the differential outlet 6, and the foot outlet 7 are respectively connected to the face outlet, the differential outlet, and the foot outlet in the vehicle cabin through a duct.

【0006】[0006]

【発明が解決しようとする課題】ところが、上述の車両
用空調装置では、温風通路Wを流れる温風とバイパス通
路Bを流れる冷風とがロータリダンパ4内部にて混合さ
れるのであるが、実際上全体に混ざり合うことはむつか
しく、冷風は冷風の流れのままにまた温風は温風の流れ
のままに進む傾向が強い。したがって、フェイス吹き出
し口5、デフ吹き出し口6、フット吹き出し口7(側
面)の順に配置される結果、フェイス通路に冷風が入り
込みやすく、フット吹き出し口7には温風が最も入り込
みやすくなっている。ここにおいて、デフ/フットモー
ドにて例えば風量50%ずつ吹き出す場合、デフ吹き出
し口6へ到る冷風が多くてフット吹き出し口7との温度
差が大き過ぎるという問題が生じている(図2改善前参
照)。
However, in the vehicle air conditioner described above, the warm air flowing through the warm air passage W and the cool air flowing through the bypass passage B are mixed inside the rotary damper 4. It is difficult to mix with the whole upper part, and there is a strong tendency for cold air to proceed with the flow of cold air and for warm air to flow with the flow of warm air. Therefore, as a result of the face outlet 5, the differential outlet 6, and the foot outlet 7 (side surface) being arranged in this order, it is easy for cold air to enter the face passage and hot air is most likely to enter the foot outlet 7. Here, in the differential / foot mode, for example, in the case where the air volume is blown out by 50%, there is a problem that a large amount of cold air reaches the differential outlet 6 and the temperature difference with the foot outlet 7 is too large (before the improvement in FIG. 2). reference).

【0007】そこで、本発明は、デフ/フットモードに
おいてもデフ吹き出し温度とフット吹き出し温度との温
度差を例えば5℃以内として所望の温度差を得る車両用
空調装置の提供を目的とする。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle air conditioner which obtains a desired temperature difference even in a differential / foot mode by setting the temperature difference between the differential blowout temperature and the foot blowout temperature to, for example, 5 ° C. or less.

【0008】[0008]

【課題を解決するための手段】上述の目的を達成するた
め、本発明は次の発明特定事項を有する。 (1)エバポレータとこのエバポレータよりも下流側の
ヒータとの間に位置するエアミックスダンパによって、
前記エバポレータから出た冷風を前記ヒータが介在する
温風通路と前記ヒータをバイパスするバイパス通路とに
分流した後、前記温風通路を流れる温風と前記バイパス
通路を流れる冷風とを混合してフェイス吹き出し口、デ
フ吹き出し口、及びフット吹き出し口の少なくとも一つ
に吹き出す車両用空調装置において、上記バイパス通路
からの冷風がフェイスダンパ、デフダンパ、フット吹き
出し口の順に到達しやすい配置を有し、上記フェイスダ
ンパ内側に突起を設けたことを特徴とする。 (2)エバポレータとこのエバポレータよりも下流側の
ヒータとの間に位置するエアミックスダンパによって、
前記エバポレータから出た冷風を前記ヒータが介在する
温風通路と前記ヒータをバイパスするバイパス通路とに
分流した後、前記温風通路を流れる温風と前記バイパス
通路を流れる冷風とを混合してフェイス吹き出し口、デ
フ吹き出し口、及びフット吹き出し口の少なくとも一つ
に吹き出すロータリ式車両用空調装置において、上記バ
イパス通路からの冷風がフェイス吹き出し口、デフ吹き
出し口、フット吹き出し口の順に到達しやすい配置を有
し、デフ/フットモードにてデフ吹き出し口に冷風が入
りにくい突起をロータリダンパ内側に設けたことを特徴
とする。
Means for Solving the Problems In order to achieve the above object, the present invention has the following matters specifying the invention. (1) The air mix damper located between the evaporator and the heater downstream of the evaporator,
After diverting the cool air flowing out of the evaporator into a warm air passage in which the heater intervenes and a bypass passage bypassing the heater, the warm air flowing in the warm air passage and the cool air flowing in the bypass passage are mixed to form a face. In a vehicle air conditioner that blows air to at least one of a blowout port, a differential blowout port, and a foot blowout port, the airflow device has an arrangement in which cold air from the bypass passage easily reaches a face damper, a differential damper, and a foot blowout port in this order. A projection is provided inside the damper. (2) The air mix damper located between the evaporator and the heater downstream of the evaporator,
After diverting the cool air flowing out of the evaporator into a warm air passage in which the heater is interposed and a bypass passage bypassing the heater, the warm air flowing in the warm air passage and the cool air flowing in the bypass passage are mixed to form a face. In a rotary type air conditioner for a vehicle that blows air to at least one of a blowout port, a differential blowout port, and a foot blowout port, an arrangement in which cool air from the bypass passage easily reaches the face blowout port, the differential blowout port, and the foot blowout port in this order. In the differential / foot mode, a projection is provided on the inner side of the rotary damper, which makes it difficult for cold air to enter the differential outlet.

【0009】[0009]

【発明の実施の形態】ここで、図1ないし図4を参照し
て本発明の実施の形態につき説明する。図1において
は、図5と異なりいわゆるダンパ式の車両用空調装置
(室内機)につき、まず説明する。なお、この図1にて
都合上室外機であるコンプレッサやコンデンサ等につい
ては、図示を省略する。図1に示す車両用空調装置にお
いては、図5と同様一体型のもの、すなわち、ブロア、
エバポレータ、ヒータがダクトで連通することなく一体
に構成されているものである。この一体型車両用空調装
置では横方向にスライドするエアミックスダンパ2が配
置され、このエアミックスダンパ2の下流にはヒータ3
が配置されて導風板8により温風通路Wが形成されると
共に直接バイパス通路Bが形成されている。したがっ
て、エバポレータを出た冷風は、そのままバイパス通路
Bを通り、またヒータ3にて加熱された後導風板8にて
曲げられ、エアミックスダンパ2の開き具合によりモー
ドダンパの手前でミックスされ、また冷風又は温風のみ
がそのまま送風されることになる。そして、各モードに
より開閉制御されるフェイスダンパ9、デフ/フットダ
ンパ10の開閉にて各モードに応じた吹出しが行なわれ
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to FIGS. In FIG. 1, a so-called damper-type vehicle air conditioner (indoor unit) different from FIG. 5 will be described first. In FIG. 1, a compressor, a condenser, and the like, which are outdoor units for convenience, are not shown. In the air conditioner for a vehicle shown in FIG. 1, an integrated type as in FIG.
The evaporator and the heater are configured integrally without communicating with a duct. In this integrated vehicle air conditioner, an air mix damper 2 that slides in a lateral direction is disposed, and a heater 3 is provided downstream of the air mix damper 2.
Are arranged, the hot air passage W is formed by the air guide plate 8, and the direct bypass passage B is formed. Therefore, the cool air that has flowed out of the evaporator passes through the bypass passage B as it is, is bent by the air guide plate 8 after being heated by the heater 3, and is mixed before the mode damper by the opening degree of the air mix damper 2, Further, only the cool air or the warm air is blown as it is. The opening and closing of the face damper 9 and the differential / foot damper 10, which are controlled to open and close in each mode, performs blowing in accordance with each mode.

【0010】更に本例にあっては、バイパス通路Bの冷
風量をエアミックスダンパ2の開度に応じて又は各モー
ドダンパの動きに応じて開閉制御し冷風量を調節するた
めの補助ダンパ11、また、ヒータ3と導風板8との間
についたて状に置かれて気流の捩りに基づく温度差を緩
和する整風板12、及び一定の位置に配置されて冷風と
温風との混合を促進する混合促進板13が配置されて、
各ダンパでの要求される温度特性に近付けるようにして
いる。
Further, in this embodiment, an auxiliary damper 11 for controlling the amount of cool air in the bypass passage B in accordance with the opening of the air mix damper 2 or the movement of each mode damper to adjust the amount of cool air. The air conditioner 12 is disposed in a vertical position between the heater 3 and the air guide plate 8 to reduce a temperature difference based on the torsion of the air flow, and is arranged at a predetermined position to mix the cool air and the hot air. A mixing facilitating plate 13 for promoting is arranged,
The temperature characteristics required for each damper are approximated.

【0011】更に、本例においては、フェイスダンパ9
の内側には、突起14が備えられている。この突起14
は、例えばフェイスダンパ9が閉じている状態でデフ/
フットダンパ10が開いているとき、それもデフとフッ
トの両モードにあるとき、フェイス吹き出し口、デフ吹
き出し口、及びフット吹き出し口の配置上、デフ吹き出
し口に冷風が多く入り込み過ぎるのを抑えるために存在
する。すなわち、図2に示すフット温度に対してデフ温
度を例えば5℃以内に近付けるようデフ温度を上げるた
めに、デフ吹き出し口へ向う冷風の向きを変えて温風と
冷風との混合を促すものである。この場合、フェイスダ
ンパが全開のときには、突起14がじゃまにならない大
きさに備えられる。
Further, in this embodiment, the face damper 9 is used.
Is provided with a projection 14 inside. This projection 14
Is, for example, when the face damper 9 is closed,
When the foot damper 10 is open and also in the differential and foot modes, the arrangement of the face outlet, the differential outlet, and the foot outlet prevents excessive cold air from entering the differential outlet. Exists. That is, in order to increase the differential temperature so that the differential temperature approaches, for example, 5 ° C. or less with respect to the foot temperature shown in FIG. 2, the direction of the cool air toward the differential outlet is changed to promote the mixing of the warm air and the cool air. is there. In this case, when the face damper is fully opened, the projection 14 is provided with a size that does not interfere.

【0012】図3では、ロータリ式車両用空調装置の例
を示しており、図5と同一部分には同符号を付してい
る。なお、この車両用空調装置でも補助ダンパ11を備
えてバイパス通路の冷風の量をエアミックスダンパ開度
やロータリダンパの開度に応じて抑えるようにしてい
る。このロータリダンパ4にあっては、図4の如くアウ
トサイド4aとインサイド4bとが存在する構造を有し
ているので、デフとフットとの両吹き出し口が開く開度
においてデフ吹き出し口の冷風を制御するインサイド4
b内位置に、例えば図4(c)の破線の如く備えられ
る。
FIG. 3 shows an example of a rotary type vehicle air conditioner, and the same parts as those in FIG. 5 are denoted by the same reference numerals. Note that this vehicle air conditioner is also provided with the auxiliary damper 11 so as to suppress the amount of cool air in the bypass passage according to the opening degree of the air mix damper and the opening degree of the rotary damper. The rotary damper 4 has a structure in which the outside 4a and the inside 4b are present as shown in FIG. Inside 4 to control
4B, for example, as shown by the broken line in FIG.

【0013】上述の説明は、フェイスダンパ9の内側や
インサイド4b内に突起14を設けたものであるが、こ
の突起14の形状や位置はバイパス通路Bからの冷風を
少ししゃ断して温風との混合がしやすくすれば良く、種
々のものが考えられる。また、これに先立ち、フェイス
は冷風、フットは温風という要求を前提としてフェイ
ス、デフ、フットの吹き出し順に配置されていることが
前提である。
In the above description, the projections 14 are provided inside the face damper 9 and inside the inside 4b. The shape and position of the projections 14 are such that the cold air from the bypass passage B is cut off a little, and May be easily mixed, and various types are conceivable. Prior to this, it is premised that the face, the differential, and the foot are arranged in the blowing order on the assumption that the face is cold air and the foot is hot air.

【0014】[0014]

【発明の効果】以上説明したように本発明によれば、フ
ェイスダンパやインサイド内にて突起を設けたことによ
り、デフ/フットモードにてデフ温度をフット温度に近
付けることができた。
As described above, according to the present invention, the provision of the projections in the face damper and the inside makes it possible to bring the differential temperature closer to the foot temperature in the differential / foot mode.

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

【図1】本発明の実施の形態の一例の断面構成図。FIG. 1 is a cross-sectional configuration diagram of an example of an embodiment of the present invention.

【図2】デフ/フットモード特性線図。FIG. 2 is a differential / foot mode characteristic diagram.

【図3】ロータリ式の断面構成図。FIG. 3 is a sectional configuration diagram of a rotary type.

【図4】ロータリ式の分解斜視図。FIG. 4 is an exploded perspective view of a rotary type.

【図5】従来例の断面構成図。FIG. 5 is a sectional configuration diagram of a conventional example.

【符号の説明】[Explanation of symbols]

4 ロータリダンパ 5 フェイス吹き出し口 6 デフ吹き出し口 7 フット吹き出し口 9 フェイスダンパ 10 デフ/フットダンパ 14 突起 4 Rotary Damper 5 Face Outlet 6 Differential Outlet 7 Foot Outlet 9 Face Damper 10 Differential / Foot Damper 14 Projection

───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤谷 誠 愛知県名古屋市中村区岩塚町字高道1番地 三菱重工業株式会社名古屋研究所内 (72)発明者 井澤 友樹 愛知県西春日井郡西枇杷島町字旭町3丁目 1番地 三菱重工業株式会社エアコン製作 所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Fujitani 1st place, Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya-shi, Aichi Prefecture Inside of Nagoya Research Laboratory, Mitsubishi Heavy Industries, Ltd. 3-chome, 1-cho Mitsubishi Heavy Industries, Ltd. Air Conditioner Works

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 エバポレータとこのエバポレータよりも
下流側のヒータとの間に位置するエアミックスダンパに
よって、前記エバポレータから出た冷風を前記ヒータが
介在する温風通路と前記ヒータをバイパスするバイパス
通路とに分流した後、前記温風通路を流れる温風と前記
バイパス通路を流れる冷風とを混合してフェイス吹き出
し口、デフ吹き出し口、及びフット吹き出し口の少なく
とも一つに吹き出す車両用空調装置において、 上記バイパス通路からの冷風がフェイスダンパ、デフダ
ンパ、フット吹き出し口の順に到達しやすい配置を有
し、上記フェイスダンパ内側に突起を設けたことを特徴
とする車両用空調装置。
An air mix damper located between an evaporator and a heater downstream of the evaporator allows a cool air flowing out of the evaporator to pass a hot air passage through which the heater intervenes and a bypass passage that bypasses the heater. The air conditioner for a vehicle that mixes the warm air flowing through the warm air passage and the cool air flowing through the bypass passage and blows the mixed air into at least one of a face outlet, a differential outlet, and a foot outlet. An air conditioner for a vehicle, comprising: an arrangement in which cold air from a bypass passage easily reaches a face damper, a differential damper, and a foot outlet in this order, and a projection is provided inside the face damper.
【請求項2】 エバポレータとこのエバポレータよりも
下流側のヒータとの間に位置するエアミックスダンパに
よって、前記エバポレータから出た冷風を前記ヒータが
介在する温風通路と前記ヒータをバイパスするバイパス
通路とに分流した後、前記温風通路を流れる温風と前記
バイパス通路を流れる冷風とを混合してフェイス吹き出
し口、デフ吹き出し口、及びフット吹き出し口の少なく
とも一つに吹き出すロータリ式車両用空調装置におい
て、 上記バイパス通路からの冷風がフェイス吹き出し口、デ
フ吹き出し口、フット吹き出し口の順に到達しやすい配
置を有し、デフ/フットモードにてデフ吹き出し口に冷
風が入りにくい突起をロータリダンパ内側に設けたこと
を特徴とする車両用空調装置。
2. An air mix damper located between an evaporator and a heater downstream of the evaporator, the cool air coming out of the evaporator being provided with a hot air passage interposed by the heater and a bypass passage bypassing the heater. After being diverted to the hot air passage, the hot air flowing through the hot air passage and the cold air flowing through the bypass passage are mixed and blown out to at least one of a face outlet, a differential outlet, and a foot outlet. An arrangement is provided in which the cool air from the bypass passage easily reaches the face outlet, the differential outlet, and the foot outlet in this order, and a projection is provided on the inner side of the rotary damper where it is difficult for the cool air to enter the differential outlet in the differential / foot mode. An air conditioner for a vehicle.
JP28816297A 1997-10-21 1997-10-21 Air-conditioning device for vehicle Withdrawn JPH11115459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28816297A JPH11115459A (en) 1997-10-21 1997-10-21 Air-conditioning device for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28816297A JPH11115459A (en) 1997-10-21 1997-10-21 Air-conditioning device for vehicle

Publications (1)

Publication Number Publication Date
JPH11115459A true JPH11115459A (en) 1999-04-27

Family

ID=17726616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28816297A Withdrawn JPH11115459A (en) 1997-10-21 1997-10-21 Air-conditioning device for vehicle

Country Status (1)

Country Link
JP (1) JPH11115459A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007168522A (en) * 2005-12-20 2007-07-05 Denso Corp Air passage opening and closing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007168522A (en) * 2005-12-20 2007-07-05 Denso Corp Air passage opening and closing device

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