JP2006145161A - Ventilating opening cover - Google Patents

Ventilating opening cover Download PDF

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JP2006145161A
JP2006145161A JP2004338763A JP2004338763A JP2006145161A JP 2006145161 A JP2006145161 A JP 2006145161A JP 2004338763 A JP2004338763 A JP 2004338763A JP 2004338763 A JP2004338763 A JP 2004338763A JP 2006145161 A JP2006145161 A JP 2006145161A
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opening
ventilation
hood
back plate
end opening
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Takashi Akaboshi
孝 赤星
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Unix Co Ltd
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Unix Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To remedy a pressure loss while providing wind resistant performance that is needed as a wind resisting specification, and to enhance even rainwater intrusion preventing performance in a ventilating opening cover. <P>SOLUTION: A bellmouth 7 having a base end opening 7d having a smaller opening area than a tip opening 7c and communicated with a spigot tube 3b is provided in an interior of a hood 6. By straightening action of the bellmouth 7, a pressure loss of the ventilating opening cover 5 itself is lowered, and an exhaust air capacity and a supply air capacity in a windless state are improved. The bellmouth 7 functions as a screen with respect to the spigot tube 3b. By this, even when wind blows into the interior of the hood 6, an exhaust air capacity and a supply air capacity needed as wind resisting specifications can be provided, and intrusion of rainwater into the spigot tube 3b is reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、建物の外壁に取付ける換気口カバーに関する。   The present invention relates to a vent cover that is attached to an outer wall of a building.

建物のダクトの屋外側端末に取付ける換気口カバーには、一連の換気経路でなる換気システムに適用した場合に、圧損が少ないこと、つまり排気風量や給気風量の大きいことが求められる。この他にも、換気口カバーには、使用環境等に応じて様々な技術的特徴をもつものがあり、例えば外風の影響を考慮しなければならない場合には、無風状態での排気風量や給気風量と比較して、外風を受けてもある程度の排気風量や給気風量を確保できることが求められる。この性能は、例えば“耐外風性能”などと呼ばれている。   The vent cover attached to the outdoor terminal of the duct of the building is required to have a small pressure loss, that is, a large exhaust air flow rate and a large supply air flow amount when applied to a ventilation system consisting of a series of ventilation paths. In addition to this, vent cover has various technical features depending on the environment of use.For example, when the influence of outside wind must be considered, Compared with the supply air volume, it is required that a certain amount of exhaust air volume and supply air volume can be secured even when external air is received. This performance is called, for example, “outside wind resistance performance”.

図４は、一従来例による耐外風仕様の換気口カバー１である。この換気口カバー１は、フード２と背面板３とを備えており、フード２は、正面、左右側面、上面、底面のあるボックス状となっている。このうち左右の各側面には、通気開口２ａが形成されており、風向制御用の縦ガラリ２ｂが架け渡すように形成されている。一方、背面板３には、フード２の後端内側に差し込ませて固定する取付枠３ａが前方に突出して形成されており、またダクトの屋外側端末に差し込んで接続する差込筒３ｂが、円筒状に成形され後方に突出するように形成されている。このような換気口カバー１は、フード２の左右各側面の通気開口２ａを、背面板３から離れた前方位置に設定し、差込筒３ｂの屋外側開口端との間に距離を置くことで、強い外風が吹き付けても、例えば差込筒３ｂからフード２の内部へ吹き出す排気風量をある程度確保できるようにしている。   FIG. 4 shows a ventilation port cover 1 having an external wind resistance specification according to a conventional example. The ventilation port cover 1 includes a hood 2 and a back plate 3, and the hood 2 has a box shape having a front surface, left and right side surfaces, an upper surface, and a bottom surface. A ventilation opening 2a is formed on each of the left and right side surfaces, and a vertical gallery 2b for wind direction control is formed so as to be bridged. On the other hand, the back plate 3 is formed with a mounting frame 3a that is inserted and fixed inside the rear end of the hood 2 so as to protrude forward, and an insertion tube 3b that is inserted and connected to the outdoor terminal of the duct. It is formed in a cylindrical shape so as to protrude rearward. In such a vent cover 1, the ventilation openings 2 a on the left and right sides of the hood 2 are set at a front position away from the back plate 3, and a distance is set between the outdoor opening end of the plug-in cylinder 3 b. Thus, even if a strong outside wind is blown, for example, the amount of exhaust air blown from the insertion tube 3b to the inside of the hood 2 can be secured to some extent.

ところが、このような換気口カバー１は、建物の外壁に取付けられるものであり、製品の外寸がある程度の大きさに制約されることもあって、圧損を改善するのが難しいという問題がある。すなわち、換気口カバー１のような構造では、フード２の通気開口２ａと差込筒３ｂの屋外側開口端との間に距離を置いているが、圧損を改善すべくその距離を短くすると、外風の影響をより強く受けて排気風量や給気風量が低下してしまう。逆に、排気風量や給気風量を高めるべく、外寸上許容できる範囲でその距離を長くとると、逆に圧損が悪化してしまう。耐外風性能を技術的特徴とする従来の換気口カバー１は、所定の耐外風性能を確保するために、ある程度の圧損の高さを容認せざるを得ない構造となっているのが実際である。   However, such a vent cover 1 is attached to the outer wall of a building, and there is a problem that it is difficult to improve the pressure loss because the outer dimension of the product is limited to a certain size. . That is, in the structure like the vent cover 1, a distance is placed between the vent opening 2a of the hood 2 and the outdoor side opening end of the insertion tube 3b, but if the distance is shortened to improve the pressure loss, Exhaust air volume and supply air volume will decrease under the influence of outside wind. On the other hand, if the distance is increased within an allowable range in terms of outer dimensions in order to increase the exhaust air volume and the supply air volume, the pressure loss will worsen. The conventional vent cover 1 having technical characteristics of outside wind resistance has a structure in which a certain degree of pressure loss must be accepted in order to ensure a predetermined outside wind performance. Is true.

また、換気口カバー１は、前述のようにある程度の圧損の高さを容認せざるを得ないため、フード２の通気開口２ａには、圧損をできるだけ悪化させない縦ガラリ２ｂが使用されている。しかしながら、換気口カバー１の取付位置の近くに建物の天井があると、縦ガラリ２ｂから吹き出した排気によって天井を汚損するおそれがある。こうした場合、本来は排気の吹出し方向を、外壁から離間する斜め下向きに偏向して、できるだけ排気が天井と接触しないような斜め下向き吹出しの斜めガラリを使用すべきではあるが、斜めガラリは縦ガラリよりも圧損が高くなるため、これをそのまま換気口カバー１に使用することは、圧損上の制約から困難である。   In addition, since the vent cover 1 has to accept a certain level of pressure loss as described above, the vertical opening 2a of the hood 2 is used for the vent opening 2a of the hood 2 which does not deteriorate pressure loss as much as possible. However, if there is a ceiling of the building near the mounting position of the vent cover 1, the ceiling may be soiled by the exhaust gas blown out from the vertical gallery 2b. In such a case, the slanted louver should be used with the slanted downward blown out so that the exhaust does not come into contact with the ceiling as much as possible by deflecting the blown out direction of the exhaust gas obliquely downward away from the outer wall. Since the pressure loss becomes higher than that, it is difficult to use it as it is for the vent cover 1 because of restrictions on pressure loss.

さらに、換気口カバー１では、外風に乗って雨水が吹き付けると、差込筒３の内部への雨水の浸入を阻害するものがなく雨水がダクト内に浸入しやすいという耐雨水浸入性能における課題もある。   Furthermore, in the ventilation opening cover 1, when rainwater blows on the outside wind, there is nothing that impedes the intrusion of rainwater into the insertion tube 3, and the rainwater entry performance problem is that rainwater tends to enter the duct. There is also.

以上のような従来技術を背景になされたのが本発明であり、その目的は、従来の換気口カバーについて、耐外風仕様として必要な耐外風性能を備えつつ圧損を改善することにあり、またこれと合わせて耐雨水浸入性能をも高めることにある。   The present invention is based on the background of the above-described conventional technology, and its purpose is to improve the pressure loss of the conventional ventilation port cover while providing the outside wind resistance required as the outside wind resistant specification. Together with this, it is to improve the rainwater infiltration performance.

上記目的を達成すべく本発明は、下記構成の換気口カバーを提供するものである。   In order to achieve the above object, the present invention provides a vent cover having the following configuration.

すなわち、請求項１の発明は、建物の外壁に沿わせる背面板と、背面板の後方に突出して外壁に開口するダクトの屋外側端末に差し込ませて接続する差込筒と、背面板の前方を覆い外気への通気開口を形成したフードと、を備える換気口カバーについて、フードの内部で背面板の前方に突出する先端開口と、先端開口よりも開口面積が小さく差込筒と連通する基端開口とを有する通気内筒を、背面板に設けたことを特徴とする。   That is, the invention of claim 1 includes a back plate that runs along the outer wall of the building, an insertion tube that is inserted into and connected to an outdoor side terminal of a duct that projects rearward of the back plate and opens to the outer wall, and a front of the back plate. A vent opening cover having a vent opening to the outside air, and a vent opening cover that projects in front of the back plate inside the hood, and a base that communicates with the insertion tube with a smaller opening area than the tip opening. A vent inner cylinder having an end opening is provided on the back plate.

請求項１記載の発明によれば、フードの内部で背面板の前方に突出する先端開口と、先端開口よりも開口面積が小さく差込筒と連通する基端開口とを有する通気内筒を、背面板に設けたため、基端開口よりも先端開口が大きい通気内筒の整流作用によって、圧損を低下させることができ、無風状態での排気風量と給気風量とを向上することができる。また、通気内筒が全長にわたって差込筒に対する衝立として機能するため、外風の吹き込みを受けても、耐外風仕様として必要な排気風量や給気風量を得ることができる。さらに、通気内筒が衝立として機能するため、差込筒への雨水の浸入を少なくすることができる。そして、前述のように圧損を低下させることができるため、縦ガラリよりも圧損が高くなる斜め下向き吹出しの斜めガラリを使用することができ、排気によって近くの天井の汚損を少なくできる。   According to the first aspect of the present invention, there is provided a vent inner cylinder having a front end opening that protrudes forward of the back plate inside the hood, and a base end opening that has a smaller opening area than the front end opening and communicates with the insertion cylinder. Since it is provided on the back plate, the pressure loss can be reduced by the rectifying action of the vented inner cylinder having a tip opening larger than the base end opening, and the exhaust air flow and the supply air flow can be improved in a no-wind state. Moreover, since the ventilation inner cylinder functions as a partition for the insertion cylinder over the entire length, it is possible to obtain the exhaust air volume and the supply air volume required for the external wind resistance specification even when the external wind is blown. Furthermore, since the ventilation inner cylinder functions as a partition, the intrusion of rainwater into the insertion cylinder can be reduced. Since the pressure loss can be reduced as described above, an oblique gusset of obliquely downward blowing that has a pressure loss higher than that of the vertical louver can be used, and the contamination of the nearby ceiling can be reduced by exhaust.

このような通気内筒は、差込筒と一連一体としても、また差込筒と別部材としても、何れによっても構成することが可能であり、その素材は金属又は合成樹脂にて構成することができる。また、通気内筒は、既存する換気口カバーの背面板に対して後付けするアタッチメントとしても構成することができる。   Such a vented inner cylinder can be constructed either as a single unit with the plug-in cylinder or as a separate member from the plug-in cylinder, and the material can be composed of metal or synthetic resin. Can do. Further, the ventilation inner cylinder can be configured as an attachment retrofitted to the rear plate of the existing ventilation port cover.

請求項２の発明は、通気内筒を、基端開口から先端開口にかけて次第に開口面積が大きくなるベルマウス形状としたものである。   The invention of claim 2 is such that the ventilation inner cylinder has a bell mouth shape in which the opening area gradually increases from the proximal end opening to the distal end opening.

前記通気内筒は、先端開口の端部側で開口面積が拡大するものとして、また先端開口と基端開口の間から開口面積が拡大するものとして構成することができる。また、請求項２記載の発明のように、基端開口から先端開口にかけて次第に開口面積が大きくなるベルマウス形状とすることもできる。この請求項２の発明のように、徐々に開口面積を大きくすることで、例えば排気が徐々に外向きに拡散される整流作用によって、圧損を低くし排気風量の減少を抑えることができる。   The vent inner cylinder can be configured such that the opening area is enlarged on the end side of the distal end opening, and the opening area is enlarged from between the distal end opening and the proximal end opening. Further, as in the invention described in claim 2, a bell mouth shape in which the opening area gradually increases from the base end opening to the tip opening can also be used. As in the second aspect of the present invention, by gradually increasing the opening area, for example, the pressure loss can be reduced and the decrease in the exhaust air volume can be suppressed by the rectifying action in which the exhaust gas is gradually diffused outward.

このようなベルマウス形状は、正円・楕円を含む円錐状の形態でも、すべての内角が等角の角錐状の形態、あるいは一部の内角が他の内角と異なる異形の角錐状の形態でもよい。   Such a bell mouth shape may be a conical shape including a perfect circle or an ellipse, a pyramid shape in which all internal angles are equiangular, or an irregular pyramid shape in which some internal angles are different from other internal angles. Good.

請求項３の発明は、通気内筒を、先端開口がフードの側面部に形成した通気開口における背面板側の開口縁と略等位置に突出する長さとして形成したものである。   According to a third aspect of the present invention, the vent inner cylinder is formed to have a length that protrudes at substantially the same position as the opening edge on the back plate side in the vent opening whose tip opening is formed in the side surface portion of the hood.

請求項３記載の発明によれば、通気内筒を、先端開口がフードの側面部に形成した通気開口における背面板側の開口縁と略等位置に突出する長さとして形成したので、製品の外寸がある程度の大きさに制限されるという設計上の制約条件を前提としながらも、圧損を小さくしつつ耐外風仕様として必要な耐外風性能を発揮することができる。   According to the invention described in claim 3, since the vent inner cylinder is formed with a length that protrudes at substantially the same position as the opening edge on the back plate side in the vent opening formed in the side surface portion of the hood, While assuming the design constraint that the outer dimensions are limited to a certain size, it is possible to exhibit the external wind resistance required as the external wind resistance specification while reducing the pressure loss.

請求項４の発明は、通気内筒に、先端開口に向けて傾斜する排水溝を設けたものである。   According to a fourth aspect of the present invention, a drainage groove that is inclined toward the tip opening is provided in the vent inner cylinder.

請求項４記載の発明によれば、通気内筒に先端開口に向けて傾斜する排水溝を設けたため、通気内筒の内周面に付着する雨水が排水溝に集めて流すことができ、耐雨水浸入性能が高まる。   According to the invention described in claim 4, since the drainage groove inclined toward the tip opening is provided in the ventilation inner cylinder, rainwater adhering to the inner peripheral surface of the ventilation inner cylinder can be collected and flowed in the drainage groove. Increases rainwater infiltration performance.

請求項５の発明は、フードの前面部に、先端開口からの排気を通気開口に受け流す傾斜面を設けたものである。   According to the invention of claim 5, an inclined surface is provided on the front surface of the hood to receive the exhaust gas from the front end opening to the ventilation opening.

請求項５記載の発明によれば、フードの前面部に、先端開口からの排気を通気開口に受け流す傾斜面を設けたため、傾斜面の整流作用により排気風量の減少を抑えることができる。   According to the fifth aspect of the present invention, since the inclined surface for receiving the exhaust from the front end opening to the ventilation opening is provided on the front surface portion of the hood, it is possible to suppress the reduction of the exhaust air volume by the rectifying action of the inclined surface.

請求項６の発明は、通気内筒の先端開口に外向きフランジを設けたものである。   In the invention of claim 6, an outward flange is provided at the front end opening of the ventilation inner cylinder.

請求項６記載の発明によれば、通気内筒の先端開口に外向きフランジを設けたため、この外向きフランジによって、外風に乗って吹き付ける雨水に対する水返しとして機能するため、耐雨水浸入性能が高まる。   According to the sixth aspect of the present invention, since the outward flange is provided at the distal end opening of the ventilation inner cylinder, the outward flange functions as a water return for rainwater sprayed on the outside wind, so that rainwater infiltration performance is achieved. Rise.

本発明の換気口カバーは、耐外風仕様として必要な耐外風性能を備えつつ圧損を改善することができるので、強い外風が吹き付ける場所での使用に好適であり、例えばダクトの室内側端部に取付けた、レンジフードファンのような排気量のある機械式の排気装置の性能を活かした換気を行うことができる。また、耐雨水浸入性能をも高めることができるので、ダクト内への雨水の浸入を阻止して、建物内への水漏れも回避できる。   The vent cover according to the present invention can improve the pressure loss while providing the outside wind resistance required as the outside wind resistance specification, and is therefore suitable for use in a place where strong outside wind blows. Ventilation can be performed taking advantage of the performance of a mechanical exhaust device with a displacement such as a range hood fan attached to the end. Moreover, since the rainwater permeation performance can be enhanced, the intrusion of rainwater into the duct can be prevented, and water leakage into the building can be avoided.

以下、本発明の実施形態の一例について、図面を参照しつつ説明する。なお、前述の従来例と同じ部分については重複説明を省略する。   Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. In addition, duplication description is abbreviate | omitted about the same part as the above-mentioned conventional example.

本形態の換気口カバー５が、前述の従来例による換気口カバー１と相違する点は、フード６の側面部６ａの通気開口６ｂに、斜め下向き吹出しの斜めガラリ６ｃを形成した点と、フード６の前面部６ｄを中央谷折り状として、排気を通気開口６ｂに受け流す「傾斜面」としての傾斜内面６ｅを形成した点と、背面板３に「通気内筒」としてのベルマウス７を設けた点である。   The vent hole cover 5 of this embodiment is different from the vent hole cover 1 according to the above-described conventional example in that an oblique louver 6c is formed in the vent opening 6b of the side surface portion 6a of the hood 6 and the hood 6 is inclined downward. 6 has a front face portion 6d in a central valley fold shape, and an inclined inner surface 6e is formed as an “inclined surface” through which exhaust air is passed to the ventilation opening 6b, and a bell mouth 7 as an “ventilated inner cylinder” is provided on the back plate 3. It is a point.

本形態のベルマウス７は、正八角形の角筒状の全体形状としたものであり、基端側の取付フランジ７ａが背面板３に対し溶接・ビス止め等されることによって、背面板３に固定してある。   The bell mouth 7 of the present embodiment has a regular octagonal rectangular tube-like overall shape, and the base plate side mounting flange 7a is welded and screwed to the back plate 3, so that the back plate 3 It is fixed.

ベルマウス７の基端開口７ｂから先端開口７ｃに至る筒軸方向に沿う長さは、本形態では図２で示すように、先端開口７ｃがフード６の側面部６ａに形成した通気開口６ｂにおける背面板側の開口縁６ｅと等位置まで突出する長さＬ１となっており、その長さＬ１にわたる基端開口７ｂから先端開口７ｃにかけて次第に開口面積が大きくなる形状となっている。そして、このようにしてフード６の内部に突出する先端開口７ｃには、外向きフランジ７ｄが形成されており、雨水の浸入を抑える水返しとして機能するようになっている。   In the present embodiment, the length along the cylinder axis direction from the base end opening 7b of the bell mouth 7 to the front end opening 7c is such that the front end opening 7c is in the ventilation opening 6b formed in the side surface portion 6a of the hood 6 as shown in FIG. The length L1 protrudes to the same position as the opening edge 6e on the back plate side, and the opening area gradually increases from the base end opening 7b to the tip opening 7c over the length L1. And the outward flange 7d is formed in the front-end | tip opening 7c which protrudes in the inside of the food | hood 6 in this way, It functions as a water return which suppresses invasion of rainwater.

次に、以上のような本形態の換気口カバー５の作用・効果を説明する。   Next, the operation and effect of the vent cover 5 of the present embodiment as described above will be described.

換気口カバー５に、フード６の内部で背面板３の前方に突出する先端開口７ｃと、先端開口７ｃよりも開口面積が小さく差込筒３と連通する基端開口７ｂとを有するベルマウス７を、背面板３に設けたため、基端開口７ｂよりも先端開口７ｃが大きいベルマウス７の整流作用によって、圧損を低下させることができ、無風状態での排気風量と給気風量とを向上することができる。また、ベルマウス７は、その全長にわたって差込筒３に対する衝立として機能するため、外風の吹き込みを受けても、耐外風仕様として必要な排気風量や給気風量を得ることができる。   A bell mouth 7 having a vent opening 5 having a front end opening 7c protruding forward of the back plate 3 inside the hood 6 and a base end opening 7b having a smaller opening area than the front end opening 7c and communicating with the insertion tube 3. Is provided on the back plate 3, the pressure loss can be reduced by the rectifying action of the bell mouth 7 having the tip opening 7c larger than the base end opening 7b, and the exhaust air flow and the supply air flow are improved in the no-wind state. be able to. Further, since the bell mouth 7 functions as a partition for the insertion tube 3 over its entire length, it can obtain the exhaust air volume and the supply air volume necessary for the external wind resistance specification even when the external wind is blown.

また、ベルマウス７は、先端開口７ｃがフード６の側面部６ａに形成した通気開口６ｂにおける背面板側開口縁６ｆと略等位置に突出する長さとして形成したので、圧損係数が小さくなり排気風量や給気風量を高めることができる。すなわち、本発明者の実験によれば、差込筒３を１５０φ、フード６の高さ寸法を２１０ｍｍ一定、フード６の横幅寸法を２１０ｍｍ一定、背面板３におけるベルマウス７の取付面とフード６の前面部６ｄの裏面との間の奥行き寸法を最大で１２０ｍｍ（側面部６ａ側部分）、最小で１１０ｍｍ（中央谷折り状部分）とし、更にベルマウス７の長さＬ１を３０ｍｍ（背面板側開口縁６ｆと完全に等位置）とした換気口カバー５を作製し、圧損係数を求めたところ、０．９７を得ることができたものである。そして、ベルマウス７が無い場合、Ｌ１が５０ｍｍの場合、Ｌ１が７０ｍｍの場合と変えたことを除き、換気口カバー５の構造・寸法および実験条件をすべて同一とした実験により圧損係数を求めたところ、それぞれ１．７９、１．７９、３．３５との結果が得られている。したがって、先端開口７ｃが背面板側開口縁６ｆと等位置とすれば、製品の外寸がある程度の大きさに制限されるという設計上の制約条件を前提としながらも、圧損を低く抑えつつ耐外風仕様として必要な耐外風性能を得ることができるが、必ずしも完全に等位置とする必要はなく、ベルマウス７の長さＬ１をそれより短く又は長くした「略」等位置とした場合であっても、ベルマウス７が無い場合と比較して、圧損を小さくしつつ耐外風仕様として必要な耐外風性能を発揮することができる。   Further, the bell mouth 7 is formed so that the front end opening 7c protrudes at substantially the same position as the back plate side opening edge 6f in the ventilation opening 6b formed in the side surface portion 6a of the hood 6, so that the pressure loss coefficient is reduced and the exhaust gas is exhausted. Air volume and supply air volume can be increased. That is, according to the experiment by the present inventor, the insertion tube 3 is 150φ, the height of the hood 6 is constant 210 mm, the horizontal width of the hood 6 is constant 210 mm, the mounting surface of the bell mouth 7 on the back plate 3 and the hood 6. The depth between the front surface portion 6d and the back surface is 120 mm at the maximum (side portion 6a side), 110 mm at the minimum (folded at the central valley), and the bell mouth 7 has a length L1 of 30 mm (on the back plate side). The ventilation port cover 5 having the same position as the opening edge 6f was produced, and the pressure loss coefficient was obtained. As a result, 0.97 was obtained. And when there was no bellmouth 7, when L1 was 50 mm, except for having changed with the case where L1 was 70 mm, the pressure loss coefficient was calculated | required by the experiment which made all the structure and the dimension of the vent cover 5 and the experiment conditions the same. However, the results of 1.79, 1.79, and 3.35 are obtained, respectively. Therefore, if the front end opening 7c is positioned at the same position as the back plate side opening edge 6f, it is assumed that the outer dimension of the product is limited to a certain size, but the pressure loss is kept low while maintaining the design constraint. Although it is possible to obtain the resistance to outside wind required for the outside wind specification, it is not always necessary to be completely equidistant, and when the length L1 of the bell mouth 7 is made shorter or longer than the “substantially” equiposition. Even so, as compared with the case where the bell mouth 7 is not provided, it is possible to exhibit the external wind resistance required as the external wind resistance specification while reducing the pressure loss.

ベルマウス７は、背面板３から前方に突出しているため、先端開口７ｃに対する雨水の浸入を少なくできる。すなわち、図４の一従来例の換気口カバー１と本形態の換気口カバー５とを比較すると、換気口カバー１では通気開口２ａから見たときの差込筒３の見掛け上の開口形状が正円形に近い楕円形であり、換気口カバー５ではベルマウス７の先端開口７ｃの見掛け上の開口形状は細長の楕円形に近く正円形とは程遠い。このため、換気口カバー１の方が見掛け上の開口面積が換気口カバー５よりも大きく、飛来する雨水が浸入しやすくなる。したがって、本形態の換気口カバー５では、ベルマウス７への雨水の浸入を抑えることができ、耐雨水浸入性能を高めることができる。   Since the bell mouth 7 protrudes forward from the back plate 3, the intrusion of rainwater into the tip opening 7c can be reduced. That is, when the vent cover 1 of the conventional example of FIG. 4 and the vent cover 5 of this embodiment are compared, in the vent cover 1, the apparent opening shape of the insertion tube 3 when viewed from the vent opening 2a is shown. In the ventilation port cover 5, the apparent opening shape of the tip opening 7c of the bell mouth 7 is close to an elongated ellipse and is far from a regular circle. For this reason, the ventilation opening cover 1 has an apparent opening area larger than that of the ventilation opening cover 5, so that rainwater that comes in can easily enter. Therefore, in the ventilation port cover 5 of this embodiment, the intrusion of rainwater into the bell mouth 7 can be suppressed, and the rainwater infiltration performance can be enhanced.

ベルマウス７は、その長さＬ１にわたる基端開口７ｂから先端開口７ｃにかけて次第に開口面積を大きくした形状であるため、排気が徐々に外向きに拡散する整流作用によって、圧損を低くし排気風量の減少を抑えることができる。また、ベルマウス７の内部に、雨水が付着しても、傾斜する先端開口７ｃに向けて排水することができるため、耐雨水浸入性能を高めることができる。   Since the bell mouth 7 has a shape in which the opening area gradually increases from the base end opening 7b to the tip opening 7c over the length L1, the pressure loss is reduced by the rectifying action in which the exhaust gradually diffuses outward, and the exhaust air volume is reduced. Reduction can be suppressed. Further, even if rainwater adheres to the inside of the bell mouth 7, it can be drained toward the inclined tip opening 7c, so that it is possible to improve rainwater infiltration performance.

ベルマウス７は、角部が下端に位置する角筒状であるため、この最下端の角部７ｅを「排水溝」として内周面に付着した雨水を集めて排水できることから、耐雨水浸入性能を高めることができる。   Since the bell mouth 7 has a rectangular tube shape with the corner portion positioned at the lower end, the rain portion attached to the inner peripheral surface can be collected and drained by using the corner portion 7e at the lower end as a “drainage groove”. Can be increased.

ベルマウス７は、先端開口７ｃに設けた外向きフランジ７ｄが外風に乗って吹き付ける雨水に対する水返しとして機能するため、耐雨水浸入性能が高まる。   The bell mouth 7 functions as a water return for rainwater that the outward flange 7d provided at the tip opening 7c rides on the outside wind, so that the rainwater infiltration performance is enhanced.

前述のようにベルマウス７によって圧損を低下できるため、従来の縦ガラリよりも圧損が高くなる斜め下向き吹出しの斜めガラリ６ｃを通気開口６ｂに形成することが可能となり、換気口カバー５の取付位置の近くに天井等の構造物があっても、排気による汚損を少なくできる。   Since the pressure loss can be reduced by the bell mouth 7 as described above, it is possible to form the diagonal louver 6c of the obliquely downward blowing that has a higher pressure loss than the conventional vertical louver in the ventilation opening 6b. Even if there is a ceiling or other structure near the door, the pollution caused by exhaust can be reduced.

フード６の前面部６ｄに、先端開口７ｃからの排気を通気開口６ｂに受け流す「傾斜面」としての傾斜内面６ｅを設けたため、傾斜内面６ｅの整流作用によって排気風量の減少を抑えて耐外風性能を高めることができる。   The front surface portion 6d of the hood 6 is provided with an inclined inner surface 6e as an “inclined surface” for receiving the exhaust from the tip opening 7c to the ventilation opening 6b. Performance can be increased.

次に、前記換気口カバー５の変形例を説明する。   Next, a modified example of the vent cover 5 will be described.

前記形態のベルマウス７は、差込筒３ｂと別部材として構成したが、一連一体としてもよい。この場合には、例えば背面板に貫通形成した取付孔に、ベルマウス７と差込筒３ｂとを一連一体とした通気筒を挿通して固定することができる。また、ベルマウス７と差込筒３ｂとを一連一体とした通気筒は、金属を板金加工した成形体であっても合成樹脂による成形体としても構成できる。   Although the bell mouth 7 of the said form was comprised as a separate member from the insertion cylinder 3b, it is good also as a series integral. In this case, for example, a cylinder through which the bell mouth 7 and the insertion cylinder 3b are integrated in series can be inserted and fixed in an attachment hole formed through the back plate. Further, the through-cylinder in which the bell mouth 7 and the insertion cylinder 3b are integrated integrally can be formed as a molded body made of a synthetic resin, even if it is a molded body made of a metal sheet.

前記形態のベルマウス７は、溶接・ビス止め等により背面板３にダクトへの取付前に予め取付けてあるものを例示したが、既存する換気口カバー（例えば図４の換気口カバー１）の背面板３に対して後付けするアタッチメントとして構成することもできる。   Although the bell mouth 7 of the said form illustrated what was previously attached to the backplate 3 before attachment to a duct by welding, screwing, etc., the existing ventilation port cover (For example, the ventilation port cover 1 of FIG. 4) is illustrated. It can also be configured as an attachment that is retrofitted to the back plate 3.

前記形態のベルマウス７は、基端開口７ｂから先端開口７ｃにかけて、徐々に開口面積が大きくなる形態を例示したが、基端開口７ｂと先端開口７ｃの中間部分から先端開口７ｃにかけて、開口面積が大きくなる形態とすることもできる。   The bell mouth 7 having the above-described configuration has an example in which the opening area gradually increases from the proximal end opening 7b to the distal end opening 7c, but the opening area from the intermediate portion between the proximal end opening 7b and the distal end opening 7c to the distal end opening 7c. It can also be set as the form which becomes large.

前記形態のベルマウス７の形状は、正八角形の角筒状を例示したが、例えば図３で示すベルマウス８のように、内周面下端部分を長さＬ２について引き下げたような異形の八角形として構成することもできる。そして、この図３のようにすることで、下向きの傾斜角が急峻となるため、排水性の向上により、耐雨水浸入性能を更に高めることができる。なお、以上のような角筒状とせずに、例えば円筒状とすることもできる。   Although the shape of the bell mouth 7 of the above-described form is an example of a regular octagonal rectangular tube, for example, as shown in the bell mouth 8 shown in FIG. It can also be configured as a square. And by making it like this FIG. 3, since a downward inclination angle becomes steep, the rainwater permeation performance can be further improved by improving drainage. In addition, it can also be set as a cylindrical shape, for example, without setting it as the above square tube shapes.

前記形態では、斜めガラリ６ｃの形成例としたが、圧損性能を高めるには従来例のような縦ガラリ２ｂとしてもよい。   In the said form, although it was set as the example of formation of the diagonal gallery 6c, in order to improve pressure loss performance, it is good also as the vertical gallery 2b like a prior art example.

前記形態のフード６は、側面部６ａに通気開口６ｂを有するものを例示したが、場合によっては他の面に通気開口を有するものとして構成することもできる。   Although the hood 6 having the above-described form is exemplified as having the ventilation opening 6b in the side surface portion 6a, the hood 6 may be configured to have the ventilation opening in another surface depending on circumstances.

一実施形態による換気口カバーの分解斜視図。The disassembled perspective view of the ventilation port cover by one Embodiment. 図１の換気口カバーの使用状態を示す中央断面図。FIG. 2 is a central cross-sectional view showing a use state of the vent cover of FIG. 1. 図１のベルマウスの変形例を示す図で、分図（ａ）は正面図、分図（ｂ）は分図（ａ）のＳＡ−ＳＡ線断面図。It is a figure which shows the modification of the bellmouth of FIG. 1, a division figure (a) is a front view, and a division figure (b) is the SA-SA sectional view taken on the line of the division figure (a). 一従来例による換気口カバーの分解斜視図。The disassembled perspective view of the ventilation port cover by a prior art example.

符号の説明Explanation of symbols

１ 換気口カバー
２ フード
２ａ 通気開口
２ｂ 縦ガラリ
３ 背面板
３ａ 取付枠
３ｂ 差込筒
５ 換気口カバー（実施形態）
６ フード
６ａ 側面部
６ｂ 通気開口
６ｃ 斜めガラリ
６ｄ 前面部
６ｅ 傾斜内面
６ｆ 背面板側開口縁
７ ベルマウス
７ａ 取付フランジ
７ｂ 基端開口
７ｃ 先端開口
７ｄ 外向きフランジ
７ｅ 角部（排水溝）
８ ベルマウス DESCRIPTION OF SYMBOLS 1 Ventilation port cover 2 Hood 2a Ventilation opening 2b Vertical louver 3 Back plate 3a Mounting frame 3b Insertion tube 5 Ventilation port cover (embodiment)
6 Hood 6a Side surface part 6b Ventilation opening 6c Diagonal louver 6d Front surface part 6e Inclined inner surface 6f Rear plate side opening edge 7 Bell mouth 7a Mounting flange 7b Base end opening 7c Front end opening 7d Outward flange 7e Corner (drainage groove)
8 Bellmouth

Claims (6)

建物の外壁に沿わせる背面板と、背面板の後方に突出して外壁に開口するダクトの屋外側端末に差し込ませて接続する差込筒と、背面板の前方を覆い外気への通気開口を形成したフードと、を備える換気口カバーにおいて、
フードの内部で背面板の前方に突出する先端開口と、先端開口よりも開口面積が小さく差込筒と連通する基端開口とを有する通気内筒を、背面板に設けたことを特徴とする換気口カバー。 A back plate that runs along the outer wall of the building, an insertion tube that connects to the outdoor side terminal of a duct that protrudes rearward of the back plate and opens to the outer wall, and forms a vent opening to the outside that covers the front of the back plate And a vent cover with a hood,
The back plate is provided with a ventilation inner cylinder having a front end opening protruding forward of the back plate inside the hood and a base end opening having a smaller opening area than the front end opening and communicating with the insertion tube. Ventilation cover. 通気内筒を、基端開口から先端開口にかけて次第に開口面積が大きくなるベルマウス形状とした請求項１記載の換気口カバー。   The ventilation opening cover according to claim 1, wherein the ventilation inner cylinder has a bell mouth shape in which an opening area gradually increases from a proximal end opening to a distal end opening. 通気内筒を、先端開口がフードの側面部に形成した通気開口における背面板側の開口縁と略等位置に突出する長さとして形成した請求項１又は請求項２記載の換気口カバー。   The ventilation port cover according to claim 1 or 2, wherein the ventilation inner cylinder is formed with a length that protrudes at substantially the same position as an opening edge on the back plate side in the ventilation opening formed at the side surface portion of the hood. 通気内筒に、先端開口に向けて傾斜する排水溝を設けた請求項１〜請求項３何れか１項記載の換気口カバー。   The ventilation port cover according to any one of claims 1 to 3, wherein a drainage groove that is inclined toward the tip opening is provided in the ventilation inner cylinder. フードの前面部に、先端開口からの排気を通気開口に受け流す傾斜面を設けた請求項１〜請求項４何れか１項記載の換気口カバー。   The ventilation port cover according to any one of claims 1 to 4, wherein an inclined surface is provided on the front surface portion of the hood to receive the exhaust from the front end opening into the ventilation opening. 通気内筒の先端開口に外向きフランジを設けた請求項１〜請求項５何れか１項記載の換気口カバー。   The ventilation port cover according to any one of claims 1 to 5, wherein an outward flange is provided at a front end opening of the ventilation inner cylinder.
JP2004338763A 2004-11-24 2004-11-24 Ventilating opening cover Pending JP2006145161A (en)

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
JP2013152077A (en) * 2013-04-12 2013-08-08 Mitsubishi Electric Corp Ventilation hood
JP2013174434A (en) * 2013-04-12 2013-09-05 Mitsubishi Electric Corp Ventilation hood
JP2013174433A (en) * 2013-04-12 2013-09-05 Mitsubishi Electric Corp Ventilation hood
KR101528028B1 (en) * 2013-07-11 2015-06-12 주식회사 에코텍코리아 External hood cap for ventilation
JP2019174081A (en) * 2018-03-29 2019-10-10 株式会社ガスター Outside air introduction unit and outside air introduction system
KR20210069465A (en) * 2019-12-03 2021-06-11 인하대학교 산학협력단 Glazing-Exchange Type ERV Air Vent Connecting Module
JP7052125B1 (en) 2021-06-28 2022-04-11 株式会社ユニックス Vent cap
JP7488563B2 (en) 2020-10-05 2024-05-22 バクマ工業株式会社 Ventilation hood, ventilation hood unit, and method for assembling the ventilation hood unit

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013152077A (en) * 2013-04-12 2013-08-08 Mitsubishi Electric Corp Ventilation hood
JP2013174434A (en) * 2013-04-12 2013-09-05 Mitsubishi Electric Corp Ventilation hood
JP2013174433A (en) * 2013-04-12 2013-09-05 Mitsubishi Electric Corp Ventilation hood
KR101528028B1 (en) * 2013-07-11 2015-06-12 주식회사 에코텍코리아 External hood cap for ventilation
JP2019174081A (en) * 2018-03-29 2019-10-10 株式会社ガスター Outside air introduction unit and outside air introduction system
JP7112822B2 (en) 2018-03-29 2022-08-04 株式会社ガスター Outside air introduction unit and outside air introduction system
KR20210069465A (en) * 2019-12-03 2021-06-11 인하대학교 산학협력단 Glazing-Exchange Type ERV Air Vent Connecting Module
KR102280520B1 (en) * 2019-12-03 2021-07-22 인하대학교 산학협력단 Glazing-Exchange Type ERV Air Vent Connecting Module
JP7488563B2 (en) 2020-10-05 2024-05-22 バクマ工業株式会社 Ventilation hood, ventilation hood unit, and method for assembling the ventilation hood unit
JP7052125B1 (en) 2021-06-28 2022-04-11 株式会社ユニックス Vent cap
JP2023005132A (en) * 2021-06-28 2023-01-18 株式会社ユニックス vent cap

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