JP2020134002A - Ventilation port cover - Google Patents
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- JP2020134002A JP2020134002A JP2019027485A JP2019027485A JP2020134002A JP 2020134002 A JP2020134002 A JP 2020134002A JP 2019027485 A JP2019027485 A JP 2019027485A JP 2019027485 A JP2019027485 A JP 2019027485A JP 2020134002 A JP2020134002 A JP 2020134002A
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Abstract
Description
本発明は、室外から室内に通じる換気口の室内側に取付ける換気口カバーに関する。 The present invention relates to a ventilation port cover attached to the indoor side of a ventilation port leading from the outside to the room.
近年、住宅の高気密化が進んでいる。高気密化された住宅では、壁材などに用いられている揮発性有機化合物(VOC)が原因のシックハウス症候群対策および室内の二酸化炭素濃度の抑制のために、排気ファンを設けるとともに室内の壁に給気口が形成される。給気口の室内側には、換気口カバーが取り付けられている。 In recent years, the airtightness of houses has been increasing. In highly airtight houses, exhaust fans are installed on the walls of the room to prevent sick building syndrome caused by volatile organic compounds (VOCs) used in wall materials and to control the concentration of carbon dioxide in the room. An air supply port is formed. A ventilation port cover is attached to the indoor side of the air supply port.
換気口カバーには、給気口の開口に対向するとともに給気口の中心軸方向に移動可能とされて給気口を開閉可能な板部が設けられている。板部は、通常は開状態で使用されるが、給気口を通じて室内に流入する給気流を必要に応じて遮断するために閉状態にすることが可能となっている。例えば、冬季に給気口を通じて流入する冷たい給気流が身体にあたり居住者が不快に感じた場合または台風時に屋外から強風が室内に吹きこむおそれがある場合等に、板部によって給気口が閉じられる。 The ventilation port cover is provided with a plate portion that faces the opening of the air supply port and is movable in the direction of the central axis of the air supply port so that the air supply port can be opened and closed. The plate portion is normally used in the open state, but can be closed in order to block the air supply air flowing into the room through the air supply port as needed. For example, when the cold airflow flowing through the air supply port hits the body in winter and the resident feels uncomfortable, or when there is a risk of strong wind blowing into the room from the outside during a typhoon, the air supply port is closed by the plate. Be done.
給気口の開口に対向する板部には、給気流が接触する。冬季に流入する冷たい給気流が板部に接触すると、室内温度との差によって板部の室内を向く面が結露し、結露水が滴下し室内を汚してしまう場合がある。特許文献1には、板部の給気口側を向く面の全体に断熱材であるパッキンを貼り付けて、結露を抑制する構成が開示されている。 The air supply comes into contact with the plate facing the opening of the air supply port. When the cold air supply flowing in in winter comes into contact with the plate portion, the surface of the plate portion facing the room may condense due to the difference from the room temperature, and the condensed water may drip and pollute the room. Patent Document 1 discloses a configuration in which a packing, which is a heat insulating material, is attached to the entire surface of the plate portion facing the air supply port side to suppress dew condensation.
しかしながら、断熱材を貼り付ける場合には、位置合わせ等の面倒な作業が発生するため、作業性の低下を招く。また、断熱材の粘着力が経時的に低下して、断熱材が剥がれてしまうおそれがある。 However, when the heat insulating material is attached, troublesome work such as alignment is required, which causes a decrease in workability. In addition, the adhesive strength of the heat insulating material may decrease with time, and the heat insulating material may be peeled off.
本発明は、上述した問題点を解決するためになされたものであり、断熱材を用いず板部の結露を防止できる換気口カバーを得ることを目的とする。 The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a ventilation port cover capable of preventing dew condensation on a plate portion without using a heat insulating material.
上述した課題を解決し、目的を達成するために、換気口カバーは、筒状の筒状部と、筒状部の一端側の開口縁に設けられて開口縁から外側に広がるフランジ部と、筒状部の一端側の開口と対向し、筒状部の中心軸方向に移動可能とされた板部と、を備える。板部は、開口に対向する第1の板部と、第1の板部を挟んで開口の反対側に設けられた第2の板部と、を有し、第1の板部と第2の板部とは互いの外縁同士が当接され、第1の板部と第2の板部との間には空気層が設けられていることを特徴とする。 In order to solve the above-mentioned problems and achieve the purpose, the ventilation port cover includes a tubular portion, a flange portion provided at the opening edge on one end side of the tubular portion, and a flange portion extending outward from the opening edge. It is provided with a plate portion that faces the opening on one end side of the tubular portion and is movable in the central axis direction of the tubular portion. The plate portion has a first plate portion facing the opening and a second plate portion provided on the opposite side of the opening with the first plate portion interposed therebetween, and has a first plate portion and a second plate portion. The outer edges of the plate are in contact with each other, and an air layer is provided between the first plate and the second plate.
本発明によれば、断熱材を用いず板部の結露を防止できる換気口カバーを得ることができるという効果を奏する。 According to the present invention, it is possible to obtain a ventilation port cover that can prevent dew condensation on the plate portion without using a heat insulating material.
以下に、本発明の実施の形態にかかる換気口カバーを図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 The ventilation port cover according to the embodiment of the present invention will be described in detail below with reference to the drawings. The present invention is not limited to this embodiment.
実施の形態1.
図1は、本発明の実施の形態1にかかる換気口カバーの据付状態を示す縦断面図であって、給気量調整板が開状態となっている図である。図2は、実施の形態1にかかる換気口カバーの据付状態を示す縦断面図であって、給気量調整板が閉状態となっている図である。図3は、実施の形態1にかかる換気口カバーの分解斜視図である。
Embodiment 1.
FIG. 1 is a vertical cross-sectional view showing an installed state of the ventilation port cover according to the first embodiment of the present invention, in which the air supply amount adjusting plate is in an open state. FIG. 2 is a vertical cross-sectional view showing an installed state of the ventilation port cover according to the first embodiment, and is a view in which the air supply amount adjusting plate is in a closed state. FIG. 3 is an exploded perspective view of the ventilation port cover according to the first embodiment.
換気口カバー30は、建物の壁または天井に形成された通風口に取り付けられて用いられる。本実施の形態1では、建物の壁11を貫通して形成された通風口7に取り付けられた例を用いて換気口カバー30の詳細な構成について説明する。 The ventilation port cover 30 is used by being attached to a ventilation port formed on a wall or ceiling of a building. In the first embodiment, the detailed configuration of the ventilation port cover 30 will be described with reference to an example attached to the ventilation port 7 formed through the wall 11 of the building.
換気口カバー30は、ベース本体2、給気量調整板1、ユニット3、フィルター4、フィルター抑え5、パッキン6を備える。 The ventilation port cover 30 includes a base body 2, an air supply amount adjusting plate 1, a unit 3, a filter 4, a filter restraint 5, and a packing 6.
ベース本体2は、筒状の筒状部2bと、筒状部2bの一端側の開口2eの縁である開口縁に設けられて開口縁から外側に広がるフランジ部2aとを有する。筒状部2bは円筒形状である。フランジ部2aは、筒状部2bの中心軸方向に沿って見た場合に四角形状である。なお、以下の説明において、筒状部2bの中心軸方向に沿って見た状態を正面視と称する。また、筒状部2bの中心軸と垂直な方向に沿って見た状態を側面視と称する。 The base main body 2 has a tubular tubular portion 2b and a flange portion 2a provided at the opening edge which is the edge of the opening 2e on one end side of the tubular portion 2b and extends outward from the opening edge. The tubular portion 2b has a cylindrical shape. The flange portion 2a has a quadrangular shape when viewed along the central axis direction of the tubular portion 2b. In the following description, the state of the tubular portion 2b viewed along the central axis direction is referred to as front view. Further, the state of being viewed along the direction perpendicular to the central axis of the tubular portion 2b is referred to as side view.
筒状部2bは、建物の壁11に形成された通風口7に差し込まれる。正面視におけるフランジ部2aは、通風口7の開口面積より大きい。フランジ部2aは、側面視において厚みを有する。フランジ部2aのうち壁11と反対側を向く面には、給気量調整板1が嵌まる凹みである収納部2dが形成されている。収納部2dは正面視において四角形形状である。壁11を挟んでフランジ部2aがある側が室内であり、その反対側が室外である。 The tubular portion 2b is inserted into the ventilation port 7 formed on the wall 11 of the building. The flange portion 2a in the front view is larger than the opening area of the ventilation port 7. The flange portion 2a has a thickness in a side view. A storage portion 2d, which is a recess into which the air supply amount adjusting plate 1 is fitted, is formed on the surface of the flange portion 2a facing the side opposite to the wall 11. The storage portion 2d has a quadrangular shape when viewed from the front. The side where the flange portion 2a is located across the wall 11 is indoors, and the opposite side is outdoor.
ユニット3は、筒状部2bの内側に固定される。ユニット3の固定の方法は特に限定されない。例えば、筒状部2bの内側に回転させながら差し込むことで、ユニット3が筒状部2bの内壁に係合するようにしてもよい。ユニット3は、機構部3bが有する軸3aが筒状部2bの中心軸方向に沿って伸縮する構造となっている。 The unit 3 is fixed inside the tubular portion 2b. The method of fixing the unit 3 is not particularly limited. For example, the unit 3 may be engaged with the inner wall of the tubular portion 2b by inserting it while rotating it inside the tubular portion 2b. The unit 3 has a structure in which the shaft 3a of the mechanical portion 3b expands and contracts along the central axis direction of the tubular portion 2b.
ユニット3の室外側には、フィルター抑え5によってフィルター4が固定される。フィルター4によって、室外から粉塵および虫等が室内へ侵入するのが防がれる。フィルター4は、交換可能とするために着脱可能とされている。 The filter 4 is fixed to the outdoor side of the unit 3 by the filter restraint 5. The filter 4 prevents dust, insects, and the like from entering the room from the outside. The filter 4 is removable so that it can be replaced.
給気量調整板1は、筒状部2bの一端側の開口2eと対向する板部である。給気量調整板1は、後述する柱部がユニット3の軸3aに形成された凹部3dに固定される。給気量調整板1は、軸3aの伸縮に伴って、筒状部2bの中心軸に沿った方向に移動可能とされている。 The air supply amount adjusting plate 1 is a plate portion facing the opening 2e on one end side of the tubular portion 2b. In the air supply amount adjusting plate 1, a pillar portion described later is fixed to a recess 3d formed in a shaft 3a of the unit 3. The air supply amount adjusting plate 1 is movable in a direction along the central axis of the tubular portion 2b as the shaft 3a expands and contracts.
給気量調整板1は、筒状部2bの中心軸に沿って室内側に移動することで、図1に示すようにフランジ部2aとの間に隙間が形成された開状態となる。給気量調整板1の開状態では、給気量調整板1とフランジ部2aとの隙間を通って、室外の空気が室内に流入可能となる。 The air supply amount adjusting plate 1 moves to the indoor side along the central axis of the tubular portion 2b, so that a gap is formed between the air supply amount adjusting plate 1 and the flange portion 2a as shown in FIG. When the air supply amount adjusting plate 1 is open, outdoor air can flow into the room through the gap between the air supply amount adjusting plate 1 and the flange portion 2a.
給気量調整板1は、筒状部2bの中心軸に沿って室外側に移動することで、図2に示すようにフランジ部2aとの隙間が小さくなった閉状態となる。給気量調整板1の閉状態では、給気量調整板1とフランジ部2aとの間の隙間が小さく、室外の空気がほとんど室内に流入できない。 By moving the air supply amount adjusting plate 1 to the outdoor side along the central axis of the tubular portion 2b, the air supply amount adjusting plate 1 is in a closed state in which the gap with the flange portion 2a is reduced as shown in FIG. When the air supply amount adjusting plate 1 is closed, the gap between the air supply amount adjusting plate 1 and the flange portion 2a is small, and almost no outdoor air can flow into the room.
パッキン6は、給気量調整板1のうちフランジ部2aと対向する面に取り付けられている。パッキン6は、閉状態においてフランジ部2aに押し当てられて当接し、室外の空気の室内への流入をより確実に防ぐ。給気量調整板1は、通常は開状態とされている。給気量調整板1は、冬季に給気口を通じて流入する冷たい外気が身体にあたり居住者が不快に感じた場合または台風時に屋外から強風が室内に吹きこむおそれがある場合等に、閉状態とされて外気の流入が防がれる。 The packing 6 is attached to the surface of the air supply amount adjusting plate 1 facing the flange portion 2a. The packing 6 is pressed against the flange portion 2a in the closed state and comes into contact with the packing 6 to more reliably prevent the inflow of outdoor air into the room. The air supply amount adjusting plate 1 is normally in an open state. The air supply amount adjusting plate 1 is closed when the cold outside air flowing in through the air supply port hits the body in winter and the resident feels uncomfortable, or when a strong wind may blow into the room from the outside during a typhoon. The inflow of outside air is prevented.
図4は、実施の形態1における給気量調整板の縦断面図である。給気量調整板1は、第1の板部である気流制御板1bと、第2の板部である意匠板1aとを有する。気流制御板1bは、筒状部2bの一端側の開口2eに対向する。意匠板1aは、気流制御板1bを挟んで開口2eの反対側に設けられる。気流制御板1bには、柱状の柱部1dが形成されている。この柱部1dが、ユニット3の軸3aの凹部3dに固定される。 FIG. 4 is a vertical cross-sectional view of the air supply amount adjusting plate according to the first embodiment. The air supply amount adjusting plate 1 has an air flow control plate 1b, which is a first plate portion, and a design plate 1a, which is a second plate portion. The airflow control plate 1b faces the opening 2e on one end side of the tubular portion 2b. The design plate 1a is provided on the opposite side of the opening 2e with the airflow control plate 1b interposed therebetween. A columnar pillar portion 1d is formed on the airflow control plate 1b. The pillar portion 1d is fixed to the recess 3d of the shaft 3a of the unit 3.
意匠板1aと気流制御板1bとは互いの外縁同士が当接されている。外縁の内側である意匠板1aと気流制御板1bとの間は、隙間が形成されて空気層1cとなっている。図5は、実施の形態1にかかる給気量調整板を気流制御板側から見た図である。図6は、実施の形態1における意匠板と気流制御板の外縁部分を拡大した部分拡大断面図である。図7は、実施の形態1にかかる給気量調整板の分解斜視図である。意匠板1aと気流制御板1bとは、四角形形状の4つの角部と4つの辺のそれぞれの中央部に、互いに係合する係合部1e,1fを有する。 The outer edges of the design plate 1a and the airflow control plate 1b are in contact with each other. A gap is formed between the design plate 1a and the airflow control plate 1b, which are inside the outer edge, to form an air layer 1c. FIG. 5 is a view of the air supply amount adjusting plate according to the first embodiment as viewed from the airflow control plate side. FIG. 6 is a partially enlarged cross-sectional view of the outer edge portions of the design plate and the airflow control plate according to the first embodiment. FIG. 7 is an exploded perspective view of the air supply amount adjusting plate according to the first embodiment. The design plate 1a and the airflow control plate 1b have engaging portions 1e and 1f that engage with each other at the four corner portions and the central portions of the four sides of the quadrangular shape.
意匠板1aの係合部1eは、外縁に形成されて気流制御板1b側に突出する断面が三角形状の三角リブの根本に外縁側に向けて凹む凹形状で形成される。気流制御板1bの係合部1fは三角リブの凹部に向かって突き出す突部で形成される。係合部1e,1fによって意匠板1aと気流制御板1bとを係合させることで、意匠板1aと気流制御板1bに孔を設けずに互いを係合させることが可能となる。これにより、空気層1cへの外気の侵入を防止することが可能となる。 The engaging portion 1e of the design plate 1a is formed in a concave shape having a cross section formed on the outer edge and protruding toward the airflow control plate 1b, which is recessed toward the outer edge side at the base of the triangular rib. The engaging portion 1f of the airflow control plate 1b is formed by a protruding portion protruding toward the recess of the triangular rib. By engaging the design plate 1a and the airflow control plate 1b with the engaging portions 1e and 1f, it is possible to engage the design plate 1a and the airflow control plate 1b with each other without providing holes. This makes it possible to prevent the intrusion of outside air into the air layer 1c.
気流制御板1bは、筒状部2bの開口2eの縁を含む平面と平行な平板部1gと、平板部1gの外縁から外側に向うにしたがって意匠板1aに近づくテーパ部1hとを有する。 The airflow control plate 1b has a flat plate portion 1g parallel to a flat surface including the edge of the opening 2e of the tubular portion 2b, and a tapered portion 1h that approaches the design plate 1a from the outer edge of the flat plate portion 1g toward the outside.
図1および図2に戻って、フランジ部2aの収納部2dの内側面には、リブであるガイドリブ2cが形成されている。ガイドリブ2cは、筒状部2bの中心軸方向に沿って延びるとともに、テーパ部1hと平行な平行縁2fを有している。平行縁2fは、閉状態の給気量調整板1をさらに室外側に押し込んだ際に当接する位置に設けられている。 Returning to FIGS. 1 and 2, guide ribs 2c, which are ribs, are formed on the inner surface of the storage portion 2d of the flange portion 2a. The guide rib 2c extends along the central axis direction of the tubular portion 2b and has a parallel edge 2f parallel to the tapered portion 1h. The parallel edge 2f is provided at a position where the closed air supply amount adjusting plate 1 comes into contact with the closed air supply amount adjusting plate 1 when it is further pushed outward.
以上説明した換気口カバー30によれば、冷たい外気が気流制御板1bに当たり気流制御板1bの温度が低下しても、空気層1cによって意匠板1aに伝導する熱を低減することができる。気流制御板1bの温度が低下しても、意匠板1aの温度の低下を抑制することができる。これにより、室内空気の温度と意匠板1aの表面の温度との差を低減することができ、室内の環境条件において意匠板1aが露点温度まで到達しにくくなり、結露の発生を抑制し、結露水の滴下による室内汚染を防止することができる。 According to the ventilation port cover 30 described above, even if the cold outside air hits the airflow control plate 1b and the temperature of the airflow control plate 1b drops, the heat conducted to the design plate 1a by the air layer 1c can be reduced. Even if the temperature of the airflow control plate 1b decreases, the decrease in the temperature of the design plate 1a can be suppressed. As a result, the difference between the temperature of the indoor air and the temperature of the surface of the design plate 1a can be reduced, and it becomes difficult for the design plate 1a to reach the dew point temperature under the indoor environmental conditions, the occurrence of dew condensation is suppressed, and dew condensation occurs. It is possible to prevent indoor pollution due to dripping of water.
また、気流制御板1bに形成されたテーパ部1hによって、気流制御板1bに当たる空気が意匠板1a側に誘引されるため、フランジ部2aの収納部2dの内側面に当たる外気を低減することができる。これにより、フランジ部2aの収納部2dの内側面の温度低下を抑制し、結露の発生を抑制し、結露水の滴下による室内汚染を防止することができる。 Further, since the air that hits the airflow control plate 1b is attracted to the design plate 1a side by the tapered portion 1h formed on the airflow control plate 1b, the outside air that hits the inner side surface of the storage portion 2d of the flange portion 2a can be reduced. .. As a result, it is possible to suppress a temperature drop on the inner surface of the storage portion 2d of the flange portion 2a, suppress the occurrence of dew condensation, and prevent indoor pollution due to dripping of dew condensation water.
また、給気量調整板1は、室外側に押し込むことで開状態と閉状態とを切り替える操作が可能であるが、意匠板1aの中央部から外れた場所を押し込んだ場合、給気量調整板1が傾き操作しづらくなる。本実施の形態1では、フランジ部2aに設けたガイドリブ2cによって給気量調整板1の傾きを抑制することができるため、給気量調整板1の操作性の向上を図ることができる。 Further, the air supply amount adjusting plate 1 can be operated to switch between the open state and the closed state by pushing it to the outdoor side, but when a place outside the central portion of the design plate 1a is pushed in, the air supply amount adjusting plate 1 is adjusted. The plate 1 is tilted and difficult to operate. In the first embodiment, since the inclination of the air supply amount adjusting plate 1 can be suppressed by the guide rib 2c provided on the flange portion 2a, the operability of the air supply amount adjusting plate 1 can be improved.
図8は、実施の形態1にかかる換気口カバーにおいて、実使用条件を想定して結露試験を実施し、時間経過による温度変化を記録した図である。図8に示すとおり、本実施の形態1にかかる換気口カバー30において、意匠板1a表面および収納部2dの内壁面の温度は露点温度を上回っており、結露の発生がないことが確認された。 FIG. 8 is a diagram in which a dew condensation test was carried out on the ventilation port cover according to the first embodiment assuming actual use conditions, and a temperature change with the passage of time was recorded. As shown in FIG. 8, in the ventilation port cover 30 according to the first embodiment, the temperatures of the surface of the design plate 1a and the inner wall surface of the storage portion 2d were higher than the dew point temperature, and it was confirmed that no dew condensation occurred. ..
以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
1 給気量調整板、1a 意匠板、1b 気流制御板、1c 空気層、1d 柱部、1e,1f 係合部、1g 平板部、1h テーパ部、2 ベース本体、2a フランジ部、2b 筒状部、2c ガイドリブ、2d 収納部、2e 開口、2f 平行縁、3 ユニット、3a 軸、3b 機構部、3d 凹部、4 フィルター、5 フィルター抑え、6 パッキン、7 通風口、11 壁、30 換気口カバー。 1 Air supply amount adjustment plate, 1a design plate, 1b air flow control plate, 1c air layer, 1d pillar part, 1e, 1f engagement part, 1g flat plate part, 1h taper part, 2 base body, 2a flange part, 2b tubular shape Part, 2c guide rib, 2d storage part, 2e opening, 2f parallel edge, 3 unit, 3a axis, 3b mechanism part, 3d recess, 4 filter, 5 filter restraint, 6 packing, 7 ventilation port, 11 wall, 30 ventilation port cover ..
Claims (5)
前記筒状部の一端側の開口縁に設けられて前記開口縁から外側に広がるフランジ部と、
前記筒状部の一端側の開口と対向し、前記筒状部の中心軸方向に移動可能とされた板部と、を備え、
前記板部は、前記開口に対向する第1の板部と、前記第1の板部を挟んで前記開口の反対側に設けられた第2の板部と、を有し、
前記第1の板部と前記第2の板部とは互いの外縁同士が当接され、前記第1の板部と前記第2の板部との間には空気層が設けられていることを特徴とする換気口カバー。 Cylindrical tubular part and
A flange portion provided on the opening edge on one end side of the tubular portion and extending outward from the opening edge,
A plate portion that faces the opening on one end side of the tubular portion and is movable in the central axis direction of the tubular portion is provided.
The plate portion has a first plate portion facing the opening and a second plate portion provided on the opposite side of the opening with the first plate portion interposed therebetween.
The outer edges of the first plate portion and the second plate portion are in contact with each other, and an air layer is provided between the first plate portion and the second plate portion. Ventilation port cover featuring.
前記第1の板部と前記第2の板部とは、前記四角形形状の4つの角部と、前記四角形形状の4つの辺のそれぞれの中央部で互いに係合する係合部を有することを特徴とする請求項1に記載の換気口カバー。 The plate portion has a quadrangular shape when viewed along the central axis direction.
The first plate portion and the second plate portion have an engaging portion that engages with each other at the four corner portions of the quadrangular shape and the central portions of the four sides of the quadrangular shape. The ventilation port cover according to claim 1.
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JP2009007912A (en) * | 2007-06-26 | 2009-01-15 | Town System:Kk | Indoor ventilating opening |
JP2013213633A (en) * | 2012-04-03 | 2013-10-17 | Panasonic Corp | Ventilating opening |
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JP3059356U (en) | 1998-11-25 | 1999-07-09 | 株式会社キョーワナスタ | Push register |
JP5404146B2 (en) | 2009-04-14 | 2014-01-29 | 東芝キヤリア株式会社 | Air supply shutter |
JP6473843B1 (en) | 2018-06-26 | 2019-02-20 | 株式会社ユニックス | Ventilation cover |
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JPS56112289U (en) * | 1980-01-31 | 1981-08-29 | ||
JP3015959U (en) * | 1995-03-20 | 1995-09-19 | 株式会社キョーワナスタ | Ventilation port for air supply |
JP2007139223A (en) * | 2005-11-15 | 2007-06-07 | Haseko Corp | Air supply register |
JP2007192428A (en) * | 2006-01-17 | 2007-08-02 | Haseko Corp | Ventilation register |
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JP2013213633A (en) * | 2012-04-03 | 2013-10-17 | Panasonic Corp | Ventilating opening |
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