JP2015081721A - Grill type induction outlet - Google Patents

Grill type induction outlet Download PDF

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Publication number
JP2015081721A
JP2015081721A JP2013219718A JP2013219718A JP2015081721A JP 2015081721 A JP2015081721 A JP 2015081721A JP 2013219718 A JP2013219718 A JP 2013219718A JP 2013219718 A JP2013219718 A JP 2013219718A JP 2015081721 A JP2015081721 A JP 2015081721A
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Prior art keywords
air
induction
mixed
outlet
conditioned space
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JP2013219718A
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JP5667270B1 (en
Inventor
木村　恵一
Keiichi Kimura
恵一 木村
浦野　勝博
Katsuhiro Urano
勝博 浦野
晃一 貝塚
Koichi Kaizuka
晃一 貝塚
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Kimura Kohki Co Ltd
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Kimura Kohki Co Ltd
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Priority to JP2013219718A priority Critical patent/JP5667270B1/en
Priority to KR1020140107119A priority patent/KR101607200B1/en
Priority to CN201410526820.4A priority patent/CN104566884A/en
Priority to CN201420580014.0U priority patent/CN204128140U/en
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Publication of JP5667270B1 publication Critical patent/JP5667270B1/en
Publication of JP2015081721A publication Critical patent/JP2015081721A/en
Priority to HK15106556.6A priority patent/HK1206093A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F24F13/084—Grilles, registers or guards with mounting arrangements, e.g. snap fasteners for mounting to the wall or duct
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew

Abstract

PROBLEM TO BE SOLVED: To acquire a grill type induction outlet capable of preventing cold draft and dew condensation.SOLUTION: The grill type induction outlet includes a body 1 which induces and mixes air in an air-conditioned space S by supply air fed from the outside, and blows out the mixture air to the air-conditioned space S. In the body 1, an air jetting port 2 for jetting the supply air, an induction air passage 3 for inducing the induction air from the air-conditioned space S, a mixture blowout air passage 4 for blowing out the mixture air of the supply air and the induction air to the air-conditioned space S, and a plurality of induction ports 5 for communicating with the induction air passage 3 and the mixture blowout air passage 4 and inducing the induction air are provided. The plurality of induction ports 5 are arranged so that the air induced and mixed at an induction port 5a on the windward side is sequentially blown in to an induction port 5b on the leeward side.

Description

本発明はグリル型誘引吹出口に関するものである。   The present invention relates to a grill-type induction outlet.

送風動力削減を目的として、空調機からの供給空気を通常よりも低温、少風量化して室内などの被空調空間に設けた吹出口から給気し、空調を行う低温送風空調システムがある。   For the purpose of reducing blower power, there is a low-temperature blower air-conditioning system that performs air conditioning by supplying air from an air conditioner at a lower temperature and a lower air volume than normal and supplying air from an air outlet provided in an air-conditioned space such as a room.

特開２００１−１５３４４８号公報JP 2001-153448 A

この空調システムに、従来のグリル型吹出口を用いると、供給空気が低温のためにコールドドラフトと結露が発生する問題がある。   When a conventional grill-type outlet is used in this air conditioning system, there is a problem that cold draft and condensation occur due to low temperature of the supply air.

本発明は上記課題を解決するため、外部から送り込まれた供給空気で被空調空間の空気を誘引混合してその混合空気を前記被空調空間へ吹出す本体を、備え、この本体内に、前記供給空気を噴出する空気噴出口と、前記誘引空気を前記被空調空間から引入れる誘引風路と、前記供給空気と前記誘引空気の前記混合空気を前記被空調空間へ吹出す混合吹出風路と、前記誘引風路と前記混合吹出風路に連通し前記誘引空気を誘引する複数の誘引口と、を設け、複数の前記誘引口を、風上側の前記誘引口で誘引混合された空気が風下側の前記誘引口へ順次吹き込まれるように配置したことを最も主要な特徴とする。   In order to solve the above-mentioned problems, the present invention comprises a main body that attracts and mixes air in an air-conditioned space with supply air sent from outside and blows the mixed air to the air-conditioned space. An air outlet for ejecting supply air, an induction air passage for drawing the induction air from the air-conditioned space, and a mixed air supply passage for blowing the mixed air of the supply air and the air to the air-conditioning space A plurality of induction ports that communicate with the induction air passage and the mixed blowout air passage and attract the induction air. The most important feature is that they are arranged so as to be sequentially blown into the induction port on the side.

請求項１の発明によれば、
（１）誘引混合によるレヒートで、混合吹出風路から被空調空間に吹出す空気と、被空調空間空気と、の温度差が少なくなるので、低温の供給空気をそのまま吹出すことで生じるコールドドラフトや被空調空間の温度ムラ、結露などを防止できて、快適性の向上を図れる。
（２）本体内部で低温の供給空気とそれよりも高温の誘引空気を混合して吹出すので空気噴出口より風下での結露発生を防止できる。そのため、誘引口と混合吹出風路の断熱が不要となって断熱処理範囲が少なくて済み、製作が容易となる。
（３）空気噴出口も兼ねた複数の誘引口にて雪だるま式に誘引空気を増やすことができ、供給空気風量に対する誘引空気の風量（混合比）を多く確保できる。そのため、混合空気の吹出風量の増加を図れて、拡散性が良好となり温度ムラがなくなる。
（４）誘引口の数を増減することで誘引風量を任意に変更でき、被空調空間空気の誘引量を増減調整することで、空調に最適な混合空気吹出温度（誘引空気混合比）を選択でき、空調効率の向上を図れる。 According to the invention of claim 1,
(1) The cold draft generated by blowing out low-temperature supply air as it is because the temperature difference between the air blown into the air-conditioned space from the mixed blow-out air passage and the air-conditioned air is reduced by reheat by induction mixing. It is possible to prevent temperature unevenness and condensation in the air-conditioned space and improve comfort.
(2) Since low-temperature supply air and hotter induction air are mixed and blown out inside the main body, it is possible to prevent the occurrence of dew condensation in the lee through the air outlet. For this reason, it is not necessary to insulate the induction port and the mixed blowout air passage, and the heat insulation treatment range is small, and the manufacture is facilitated.
(3) It is possible to increase the attracting air in a snowman manner at a plurality of attracting openings that also serve as air outlets, and to secure a large amount of attracting air (mixing ratio) with respect to the amount of air supplied. Therefore, the amount of air blown out from the mixed air can be increased, the diffusibility is improved, and temperature unevenness is eliminated.
(4) The amount of air flow can be changed arbitrarily by increasing / decreasing the number of air inlets, and by adjusting the amount of air to be air-conditioned space increased / decreased, the optimum mixed air blowing temperature (attracting air mixing ratio) for air conditioning can be selected. It is possible to improve the air conditioning efficiency.

請求項２の発明によれば、
（１）１つの仕切部材で２つの誘引口を形成できるので、構造が簡素化され製作が容易となる。
（２）誘引口を風下へ向かって口径が小さくして風速を上げることができるので誘引性能が低下せず、誘引量を安定確保できる。 According to the invention of claim 2,
(1) Since two attracting openings can be formed by one partition member, the structure is simplified and the manufacture becomes easy.
(2) Since the diameter of the attracting port decreases toward the leeward and the wind speed can be increased, the attracting performance is not lowered and the amount of attracting can be secured stably.

図１〜図３は、本発明のグリル型誘引吹出口の一実施例を示しており、このグリル型誘引吹出口は、外部から送り込まれた供給空気で被空調空間Ｓの空気を誘引混合してその混合空気を被空調空間Ｓへ吹出す本体１を、備えている。被空調空間Ｓは、オフィスビルや病院、ホテルなどの各種建物の室内やホールなどの空間である。この被空調空間Ｓの壁面や天井等にグリル型誘引吹出口を設ける。グリル型誘引吹出口には、図示省略の空調機からダクト等を介して調和用空気等が供給される。なお、各図における点線の太矢印は風向を示す。   1 to 3 show an embodiment of a grill-type induction blower according to the present invention. This grille-type induction blowout draws and mixes the air in the air-conditioned space S with the supplied air sent from the outside. And a main body 1 for blowing the mixed air to the air-conditioned space S. The air-conditioned space S is a space such as a room or a hall of various buildings such as office buildings, hospitals, and hotels. A grill-type induction outlet is provided on the wall surface or ceiling of the air-conditioned space S. Air conditioning air or the like is supplied to the grill-type induction outlet from an air conditioner (not shown) through a duct or the like. In addition, the thick arrow of a dotted line in each figure shows a wind direction.

本体１内には、供給空気を噴出する空気噴出口２と、誘引空気を被空調空間Ｓから引入れる誘引風路３と、供給空気と誘引空気の混合空気を被空調空間Ｓへ吹出す混合吹出風路４と、誘引風路３と混合吹出風路４に連通し誘引空気を誘引する複数の誘引口５…と、を設け、複数の誘引口５…を、風上側の誘引口５ａで誘引混合された空気が風下側の誘引口５ｂへ順次吹き込まれるように配置する。   In the main body 1, an air outlet 2 that ejects supply air, an induction air passage 3 that draws induced air from the air-conditioned space S, and a mixture that blows mixed air of supply air and induced air to the air-conditioned space S There are provided a blow-out air passage 4, a plurality of induction openings 5 that communicate with the induction air passage 3 and the mixed blow-out air passage 4, and draw the induction air. It arrange | positions so that the air by which the attraction | suction mixing was carried out may be sequentially blown in to the induction port 5b of the leeward side.

空気噴出口２は、本体１の細長状吹出開口部１１の対向する長辺に沿ってライン状に形成する。誘引風路３と混合吹出風路４の連通部は１つの仕切部材６で区画して、２つの誘引口５、５を空気噴出口２に沿ってライン状に形成する。空気噴出口２と誘引口５は、通過断面積を減少させ風速を高めるために風下へ向かって口径が小さくなるように形成する。   The air outlet 2 is formed in a line shape along the opposing long sides of the elongated outlet 11 of the main body 1. A communicating portion between the induction air passage 3 and the mixed blow-out air passage 4 is partitioned by one partition member 6, and two induction ports 5 and 5 are formed in a line shape along the air outlet 2. The air outlet 2 and the induction port 5 are formed so that the diameter decreases toward the leeward side in order to reduce the passage cross-sectional area and increase the wind speed.

本体１は、両端部が開口する角筒状の外壁体８及び内壁体９と、仕切部材６と、複数のベーン１０と、を有している。内壁体９は外壁体８の内部に所定間隔を隔てて設ける。この外壁体８の内面と内壁体９の外面にて誘引風路３を形成し、内壁体９の内面にて混合吹出風路４を形成する。なお、混合吹出風路４と誘引風路３の構成、構造の変更は自由であり、図例に限定されるものではない。   The main body 1 includes a rectangular tubular outer wall body 8 and an inner wall body 9 that are open at both ends, a partition member 6, and a plurality of vanes 10. The inner wall body 9 is provided inside the outer wall body 8 at a predetermined interval. The induction air passage 3 is formed by the inner surface of the outer wall body 8 and the outer surface of the inner wall body 9, and the mixed blowing air passage 4 is formed by the inner surface of the inner wall body 9. In addition, the structure of the mixed blowing air path 4 and the induction air path 3 and the change of a structure are free, and are not limited to the example of a figure.

本体１に送り込まれた供給空気は空気噴出口２を通過し、風上側の誘引口５aに向かって噴出する。その際、空気噴出口２と風上側の誘引口５aとの間隙部が負圧となって、被空調空間Ｓの空気を誘引風路３を介して誘引する。誘引空気は供給空気と混合して風量が増加した混合空気となり、誘引口５aの先細口にて風速を上げながら風下側の誘引口５ｂに向かって噴出する。これにより、風上側の誘引口５aと風下側の誘引口５aとの間隙部が負圧となって、被空調空間Ｓの空気を誘引風路３を介して誘引し、さらに風量が増加した混合空気となる。このように、風上側の誘引口５で誘引混合された空気を風下側の誘引口５へ順次吹き込むようにしてあるので、混合空気吹出風量（供給空気風量に対する誘引空気風量の比率）を多くできる。   The supply air sent into the main body 1 passes through the air outlet 2 and is jetted toward the induction port 5a on the windward side. At that time, the gap between the air jet outlet 2 and the windward attracting opening 5 a becomes negative pressure, and the air in the air-conditioned space S is attracted via the attracting air passage 3. The attraction air is mixed with the supply air to become mixed air having an increased air volume, and is jetted toward the leeward induction port 5b while increasing the wind speed at the tapered port of the induction port 5a. As a result, the gap between the windward attracting port 5a and the windward attracting port 5a becomes negative pressure, and the air in the air-conditioned space S is attracted via the attracting air passage 3, and the air volume is further increased. It becomes air. In this way, the air that has been attracted and mixed at the leeward induction port 5 is sequentially blown into the leeward induction port 5, so that the mixed air blowing amount (ratio of the induced air amount to the supplied air amount) can be increased. .

混合空気は、混合吹出風路４を通り被空調空間Ｓに向かって拡散して吹出す。例えば、冷房時、誘引口５および混合吹出風路４では１３℃の低温の供給空気と、それよりも高温の室内２７℃の誘引空気を混合することで再熱（レヒート）されるので結露は生じない。なお、供給空気は誘引混合された時点で被空調空間Ｓの露点温度より高温で絶対湿度が低くなるように設定するが変更は自由である。   The mixed air diffuses and blows out toward the air-conditioned space S through the mixed blowing air passage 4. For example, at the time of cooling, the induction port 5 and the mixed blowout air passage 4 are reheated (reheat) by mixing the low-temperature supply air of 13 ° C. with the induction air of 27 ° C., which is higher in the room, so Does not occur. The supply air is set to be higher than the dew point temperature of the air-conditioned space S when it is attracted and mixed, but it can be changed freely.

なお、本発明は上述の実施例に限定されず、本発明の要旨を逸脱しない範囲で設計変更自由である。例えば誘引口５や誘引風路３の数を増減するも自由である。   In addition, this invention is not limited to the above-mentioned Example, A design change is freely possible in the range which does not deviate from the summary of this invention. For example, it is free to increase / decrease the number of attraction openings 5 and attraction wind paths 3.

グリル型誘引吹出口を吹出開口部側から見た図である。It is the figure which looked at the grill type induction blower outlet from the blower opening part side. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図２のＢ矢視図である。FIG. 3 is a view taken in the direction of arrow B in FIG.

１ 本体
２ 空気噴出口
３ 誘引風路
４ 混合吹出風路
５ 誘引口
６ 仕切部材
１１ 吹出開口部
Ｓ 被空調空間 DESCRIPTION OF SYMBOLS 1 Main body 2 Air outlet 3 Invitation air path 4 Mixed blowing air path 5 Induction port 6 Partition member 11 Outlet opening S Air-conditioned space

請求項１の発明によれば、
（１）誘引混合によるレヒートで、混合吹出風路から被空調空間に吹出す空気と、被空調空間空気と、の温度差が少なくなるので、低温の供給空気をそのまま吹出すことで生じるコールドドラフトや被空調空間の温度ムラ、結露などを防止できて、快適性の向上を図れる。
（２）本体内部で低温の供給空気とそれよりも高温の誘引空気を混合して吹出すので空気噴出口より風下での結露発生を防止できる。そのため、誘引口と混合吹出風路の断熱が不要となって断熱処理範囲が少なくて済み、製作が容易となる。
（３）空気噴出口も兼ねた複数の誘引口にて雪だるま式に誘引空気を増やすことができ、供給空気風量に対する誘引空気の風量（混合比）を多く確保できる。そのため、混合空気の吹出風量の増加を図れて、拡散性が良好となり温度ムラがなくなる。
（４）誘引口の数を増減することで誘引風量を任意に変更でき、被空調空間空気の誘引量を増減調整することで、空調に最適な混合空気吹出温度（誘引空気混合比）を選択でき、空調効率の向上を図れる。
（５）１つの仕切部材で２つの誘引口を形成して空気噴出口と誘引口を兼用させることができるので、構造が簡素化され製作が容易となる。
（６）誘引口を風下へ向かって口径を小さくして風速を上げることができるので誘引性能が低下せず、誘引量を安定確保できる。 According to the invention of claim 1,
(1) The cold draft generated by blowing out low-temperature supply air as it is because the temperature difference between the air blown into the air-conditioned space from the mixed blow-out air passage and the air-conditioned air is reduced by reheat by induction mixing. It is possible to prevent temperature unevenness and condensation in the air-conditioned space and improve comfort.
(2) Since low-temperature supply air and hotter induction air are mixed and blown out inside the main body, it is possible to prevent the occurrence of dew condensation in the lee through the air outlet. For this reason, it is not necessary to insulate the induction port and the mixed blowout air passage, and the heat insulation treatment range is small, and the manufacture is facilitated.
(3) It is possible to increase the attracting air in a snowman manner at a plurality of attracting openings that also serve as air outlets, and to secure a large amount of attracting air (mixing ratio) with respect to the amount of air supplied. Therefore, the amount of air blown out from the mixed air can be increased, the diffusibility is improved, and temperature unevenness is eliminated.
(4) The amount of air flow can be changed arbitrarily by increasing / decreasing the number of air inlets, and by adjusting the amount of air to be air-conditioned space increased / decreased, the optimum mixed air blowing temperature (attracting air mixing ratio) can be selected It is possible to improve the air conditioning efficiency.
(5) Since two inlets can be formed by one partition member and the air outlet and the inlet can be used together, the structure is simplified and the manufacture is facilitated.
(6) Since the wind speed can be increased by reducing the diameter of the attracting opening toward the leeward, the attracting performance is not lowered, and the amount of attracting can be secured stably.

本体１は、両端部が開口する断面が長方形の筒状の外壁体８及び内壁体９と、仕切部材６と、複数のベーン１０と、を有し、内壁体９を外壁体８の内部に所定間隔を隔てて設ける。この外壁体８の内面と内壁体９の外面にて誘引風路３を形成し、内壁体９の内面にて混合吹出風路４を形成すると共に内壁体９の一端部にて混合空気の吹出開口部１１を形成する。なお、混合吹出風路４と誘引風路３の構成、構造の変更は自由であり、図例に限定されるものではない。The main body 1 includes a cylindrical outer wall body 8 and an inner wall body 9 whose both end portions are rectangular, a partition member 6, and a plurality of vanes 10, and the inner wall body 9 is placed inside the outer wall body 8. Provided at a predetermined interval. The induction air passage 3 is formed by the inner surface of the outer wall body 8 and the outer surface of the inner wall body 9, and the mixed blowing air passage 4 is formed by the inner surface of the inner wall body 9 and the mixed air is blown out at one end of the inner wall body 9. Opening 11 is formed. In addition, the structure of the mixed blowing air path 4 and the induction air path 3 and the change of a structure are free, and are not limited to the example of a figure.

空気噴出口２は、細長状の吹出開口部１１の対向する長辺全域に沿ってライン状に連続形成し、２つの誘引口５は、誘引風路３と混合吹出風路４の連通部を１つの仕切部材６で区画して、吹出開口部１１の対向する長辺全域に沿ってライン状に連続形成し、かつ、空気噴出口２と誘引口５は、通過断面積を減少させ風速を高めるために風下へ向かって口径が小さくなるように形成する。The air outlet 2 is continuously formed in a line along the entire opposing long sides of the elongated outlet 11, and the two inlets 5 are connected to the inlet part 3 and the mixed outlet part 4. It is divided by one partition member 6 and is continuously formed in a line shape along the entire long side opposite to the blowout opening 11, and the air outlet 2 and the inlet 5 reduce the passage cross-sectional area and increase the wind speed. In order to raise, it forms so that an aperture may become small toward leeward.

Claims (2)

外部から送り込まれた供給空気で被空調空間（Ｓ）の空気を誘引混合してその混合空気を前記被空調空間（Ｓ）へ吹出す本体（１）を、備え、この本体（１）内に、前記供給空気を噴出する空気噴出口（２）と、前記誘引空気を前記被空調空間（Ｓ）から引入れる誘引風路（３）と、前記供給空気と前記誘引空気の前記混合空気を前記被空調空間（Ｓ）へ吹出す混合吹出風路（４）と、前記誘引風路（３）と前記混合吹出風路（４）に連通し前記誘引空気を誘引する複数の誘引口（５）と、を設け、複数の前記誘引口（５）を、風上側の前記誘引口（５）で誘引混合された空気が風下側の前記誘引口（５）へ順次吹き込まれるように配置したことを特徴とするグリル型誘引吹出口。   A main body (1) for attracting and mixing the air in the air-conditioned space (S) with the supply air sent from the outside and blowing the mixed air to the air-conditioned space (S) is provided in the main body (1). An air outlet (2) for ejecting the supply air, an induction air passage (3) for drawing the induction air from the air-conditioned space (S), and the mixed air of the supply air and the induction air A mixed blowout air passage (4) that blows out to the air-conditioned space (S), and a plurality of induction ports (5) that communicate with the induction air passage (3) and the mixed blowout air passage (4) to attract the attraction air. And the plurality of attracting openings (5) are arranged so that the air attracted and mixed at the attracting opening (5) on the leeward side is sequentially blown into the attracting opening (5) on the leeward side. Features a grill-type induction outlet. 空気噴出口（２）を、本体（１）の細長状吹出開口部（１１）の対向する長辺に沿ってライン状に形成し、誘引風路（３）と混合吹出風路（４）の連通部を仕切部材（６）で区画して、風下へ向かって口径が小さくなるように誘引口（５）を、前記空気噴出口（２）に沿ってライン状に形成した請求項１記載のグリル型誘引吹出口。   The air outlet (2) is formed in a line shape along the opposing long sides of the elongated outlet (11) of the main body (1), and the induction air passage (3) and the mixed air outlet (4) The communication portion is partitioned by a partition member (6), and an induction port (5) is formed in a line shape along the air jet port (2) so that the diameter decreases toward the leeward side. Grill type induction outlet.
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CN201410526820.4A CN104566884A (en) 2013-10-23 2014-10-09 Grille type induction blowout opening
CN201420580014.0U CN204128140U (en) 2013-10-23 2014-10-09 Grid type induced blowing-out port
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