EP0075468A1 - Appareil de ventilation pour bâtiments - Google Patents

Appareil de ventilation pour bâtiments Download PDF

Info

Publication number
EP0075468A1
EP0075468A1 EP82304928A EP82304928A EP0075468A1 EP 0075468 A1 EP0075468 A1 EP 0075468A1 EP 82304928 A EP82304928 A EP 82304928A EP 82304928 A EP82304928 A EP 82304928A EP 0075468 A1 EP0075468 A1 EP 0075468A1
Authority
EP
European Patent Office
Prior art keywords
air
guide elements
outlet conduit
opening
region
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Withdrawn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
EP82304928A
Other languages
German (de)
English (en)
Inventor
Bernd Weinert
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.)
Colt International Holdings AG
Colt International Ltd
Original Assignee
Colt International Holdings AG
Colt International 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
Priority claimed from DE19813141268 external-priority patent/DE3141268A1/de
Application filed by Colt International Holdings AG, Colt International Ltd filed Critical Colt International Holdings AG
Publication of EP0075468A1 publication Critical patent/EP0075468A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation
    • 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

Definitions

  • the invention relates to a ventilating apparatus for buildings having an air outlet conduit for exhausting spent air out of the interior of a building, the conduit extending between an inlet opening predetermined by a roof opening and an outlet opening formed by a housing, an air-guide device for the spent air being associated with the inlet opening with guide elements differing in their alignment at least locally from the longitudinal direction of the conduit.
  • the ventilating action of such natural ventilating apparatuses is based on a pressure drop, caused thermally, between the air in the interior of the building and the outside air, which causes a flow of air, the cool outside air flowing into the building through openings situated low down in the building structure generally in the walls of the building, warming up, and flowing out of the building through the ventilating apparatus situated high up and generally disposed on the roof of the building.
  • the aerodynamic efficiency of the known ventilating apparatuses is reduced by losses during the flow through the ventilating apparatus as a result of friction and, in particular, turbulence. These losses occur particularly with inlet openings ol r the air-outlet conduit bounded by sharp edges, because the air flow changes from laminar to turbulent flow at the edge of the inlet opening, so that a turbulence forms in the direction of flow behind the inlet opening of the air-outlet conduit, in its marginal region.
  • the existing cross-sectional area of flow of the air-outlet conduit is reduced by this so that the aerodynamically effective cross-sectional area of flow is less than the actual geometric cross-sectional opening of the air-outlet conduit.
  • an improvement in the efficiency of the ventilating apparatus can be achieved by an air guide device for the spent air flowing out of the interior of the building which device, with its guide elements differing at least locally from the longitudinal direction of the conduit, is associated with the inlet opening of the air-outlet conduit.
  • the air guide device is formed by a mouthing which is disposed in front of the roof opening defining the inlet opening of the air-outlet conduit, with its arcuate guide elements projecting into the interior of the building in an extension of the lateral walls of the air-outlet conduit and there widen out in the form of a funnel.
  • the air guide device is disposed inside the opening cross-section of the air outlet conduit in its marginal region and its guide elements each comprise an inner region which extends substantially parallel to the longitudinal direction of the conduit from the inlet opening towards the outlet opening and an outer region which diverges towards the edge of the air-outlet conduit and which extends,in an extension of its inner region, beyond the inlet opening into the interior of the building.
  • the ventilating apparatus only occupies a small amount of the interior of the building with its air guide device and in particular does not require any alteration or enlargement of the roof opening defining the inlet opening of the air-outlet conduit.
  • the outer region of the guide elements, diverging towards the edge of the air-outlet conduit and projecting into the interior of the building ensures a gentle introduction of the spent air into the air-outlet conduit in its marginal regions into which streams of spent air moving along the ceiling of the interior of the building are .
  • the ventilating apparatus illustrated in Figs. 1, 2 and 3 comprises, in each embodiment, a housing, designated as a whole by 1, with two pairs of opposite vertical walls 2, at the lower end of which an encircling flange 3 is provided for securing the usually rectangular housing 1 to the roof of a building indicated at 4 in the form of a thin roofing, via a roof opening 5.
  • the inner faces of the walls 2 of the housing are disposed in alignment with the edge of the roof opening 5. Instead of this, it is possible to extend the inner faces of the housing walls 2 downwards by means of facing panels which line the roof opening 5 through a thicker roof structure at the edge.
  • the space bounded by the housing walls 2 and the edge of the roof opening 5 forms an air-outlet conduit 6, the inlet opening of which is formed by the roof opening 5.
  • the housing 1 is provided with screening walls 7.
  • the housing 1 forms with its walls 2 an outlet opening 8 through which the spent air flowing in through the roof opening 5 in accordance with the arrows 9, guided through the air-outlet conduit 6 and rising from the interior of the building, flows away into the atmosphere.
  • the housing 1 is provided with a closing device 10 which closes or opens the air-outlet conduit 6 and which, in the example illustrated, is formed by two ventilating flaps 11 which are articulated on two opposite housing walls 2 and which are pivotable between the vertical position illustrated in the drawing and freeing the air-outlet conduit 6, and a horizontal position closing the air-outlet conduit 6, in which they are held on a central U-shaped girder 12 which in turn extends between a pair of the opposite housing walls 2, parallel to the pivotal axis of the ventilating flaps 11.
  • a closing device 10 which closes or opens the air-outlet conduit 6 and which, in the example illustrated, is formed by two ventilating flaps 11 which are articulated on two opposite housing walls 2 and which are pivotable between the vertical position illustrated in the drawing and freeing the air-outlet conduit 6, and a horizontal position closing the air-outlet conduit 6, in which they are held on a central U-shaped girder 12 which in turn extends between a pair of the opposite housing walls 2, parallel to the pivotal axis of
  • the air-outlet conduit 6 is provided, inside its opening cross-section, in its marginal region, with an air guide device 13 which is formed by guide elements 14.
  • the guide elements 14 each have an inner region 15 which extends substantially parallel to the longitudinal direction of the air-outlet conduit 6 and which extends from the inlet or roof opening 5 to the outlet opening 8, and an outer region 16 which diverges towards the edge of the air-outlet conduit 6 and which extends in an extension of the inner region 15 beyond the plane of the roof opening 5 into the interior of the building while maintaining spacing from the lateral walls of the air-outlet conduit 6.
  • the guide elements 14, which themselves have only a slight thickness and may be formed from thin metal sheets or laminations, are secured to the housing walls 2 by means of thin struts (not illustrated) and form, with their inner regions 15, a frame which is disposed with spacing from the lateral walls of the air-outlet conduit 6, which spacing corresponds substantially to 1/2 to 1 times the length dimension of the guide elements 14 in the direction of flow of the spent air.
  • the inner region 15 and the outer region 16 of the guide elements 14 have substantially the same length in the direction of flow of the spent air.
  • the guide elements 14 in the embodiments shown in Figures 1 and 2 occupy about 1/3 to 1/2 of the height of the air-outlet conduit 6.
  • the length of the outer region 16 of the guide elements 14 is selected to be at least substantially equal to the spacing of the inner regions 15 from the housing walls 2 which define the lateral walls of the air-outlet conduit 6.
  • the outer region 16 is inclined at an angle from the inner region 15 of the guide elements 14 along a linear region 17.
  • the guide elements 14 shaped in this manner can be produced in a particularly simple manner by a simple bending operation.
  • the outer region 16' of the guide elements 14 is made arcuate in the form of a channel open towards the edge of the air-outlet conduit 6, in the manner of a concave fillet, which can further improve the inflow movement of the spent air out of the interior of the building.
  • the angle at which the outer region 16 diverges in relation to the inner region 15 of the guide elements 14 may appropriately lie in the range from about 30° to 60° and preferably amounts to about, 4 50 .
  • the embodiment shown in Figure 3 corresponds substantially to the embodiment shown in Figure 1 but as distinct from Figure 1, the roof 4 is formed from a roofing panel 4' which is relatively thick in comparison with the thin roofing of Figure 1.
  • the roof panel 4' is included with the extent of its thickness or height in the air-outlet conduit 6 in such a manner that the edge of the roof opening continues the housing walls 2 downwards.
  • the housing walls 2 may be extended downwards by facing panels which line the roof opening 5 at the edge.
  • the guide elements 14 extend with the top of their inner region 15 substantially up to half the height of the roof panel 4' into the air-outlet conduit 6 and only occupy about 1/5 of the height of the air-outlet conduit 6.
  • a flow of the spent air, free of turbulence, out of the interior of the building into the air-outlet conduit is achieved in its critical marginal regions by an equalization of the air flow at each side of the guide elements 14, as illustrated by the arrows 9'.
  • extension panels 100 form a rectangular sectioned air outlet conduit or ventilator throat 112 corresponding with the air-outlet conduit 6 in the embodiments of Figures 1, 2 and 3 and extending upwardly from a roof opening 50 to an outlet opening 51 of a natural roof ventilator having a housing 114 mounted to the outside of the roof sheeting 116 carried on purlins 117.
  • the panels 100 extend two opposite pairs of vertical housing walls 115 downwardly through the roof structure.
  • the housing 114 carries pivotably adjustable louvre blades 118 pivotably movable on axes 120 to open and close the ventilator. In their closed position, the louvre blades combine together to cover over the ventilator throat 112 to prevent the entry of rain. Rain water drains from the outside surfaces of the blades 118 into drain channels 122 in the housing which lead water outside the housing onto the outside of the sheeting 116.
  • the louvre blades may be replaced by a cowl (not shown) which permanently shelters the ventilator throat against the entry of rain and drains the rain water directly onto the outside of the roof sheeting, outside the housing 114.
  • Brackets 124 mount an air guide device 126 comprised of guide elements 53 in the throat 112, the device 126 projecting into the space 130 inside the roof structure being ventilated by the ventilator.
  • the device 126 has a bell mouthed entry or outer portion or region 126 1 followed by a parallel sided, downstream, inner portion or region 126" spaced from the throat walls formed by the extension panels 100 by 40 to 50 mm.
  • the annular passage 134 formed between the air guide device 126 and the throat has a constant through flow cross-section.
  • this through flow cross-sectional area may decrease from the passage entry to the plane of the ceiling 140, and thereafter remain constant, using an air guide device 126a having a frusto-conical entry portion 126a' as shown in Figure 5, mounted in the ventilator throat at the position indicated for the device 126.
  • the device 126a has a downstream portion 126a" corresponding with the portion 126" and joining therewith along a linear region 54' which lies in the inlet opening 50.
  • the device 126 or 126a smooths the entry of air into the ventilator and air is additionally drawn into the ventilator through the passage 134 from the region immediately below the ceiling level.
  • a circular ventilator having a cylindrical throat 112
  • a circular sectioned air guide. device 126 is used.
  • the invention extends to powered extract ventilators employing a fan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Building Environments (AREA)
EP82304928A 1981-09-21 1982-09-20 Appareil de ventilation pour bâtiments Withdrawn EP0075468A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8128478 1981-09-21
GB8128478 1981-09-21
DE3141268 1981-10-17
DE19813141268 DE3141268A1 (de) 1981-10-17 1981-10-17 Entlueftungsvorrichtung fuer gebaeude

Publications (1)

Publication Number Publication Date
EP0075468A1 true EP0075468A1 (fr) 1983-03-30

Family

ID=25796750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82304928A Withdrawn EP0075468A1 (fr) 1981-09-21 1982-09-20 Appareil de ventilation pour bâtiments

Country Status (2)

Country Link
EP (1) EP0075468A1 (fr)
AU (1) AU8865582A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866372A1 (fr) * 2004-02-12 2005-08-19 Hexadome Sa Exutoire de desenfumage comportant des moyens de canalisation d'une partie de la fumee

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU576778B2 (en) * 1983-08-26 1988-09-08 Michele Young Ventilator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727456A (en) * 1952-02-20 1955-12-20 Davies Charles Adjustable air diffusers
US2735352A (en) * 1956-02-21 Demuth
US3046866A (en) * 1959-09-22 1962-07-31 Titus Mfg Corp Air deflectors or diffusers and throw control devices therefor
US3177795A (en) * 1962-01-12 1965-04-13 Aircoustic Co Inc Airflow and noise controlling plenum diffuser assembly
DE2652838A1 (de) * 1976-11-20 1978-05-24 Colt Int Gmbh Entlueftungsvorrichtung fuer gebaeude
DE2653161A1 (de) * 1976-11-23 1978-05-24 Schako Metallwarenfabrik Luftverteilkasten fuer belueftungs- und klimaanlagen
GB1594964A (en) * 1978-02-08 1981-08-05 Sian Pah Tio Square ceiling diffuser

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735352A (en) * 1956-02-21 Demuth
US2727456A (en) * 1952-02-20 1955-12-20 Davies Charles Adjustable air diffusers
US3046866A (en) * 1959-09-22 1962-07-31 Titus Mfg Corp Air deflectors or diffusers and throw control devices therefor
US3177795A (en) * 1962-01-12 1965-04-13 Aircoustic Co Inc Airflow and noise controlling plenum diffuser assembly
DE2652838A1 (de) * 1976-11-20 1978-05-24 Colt Int Gmbh Entlueftungsvorrichtung fuer gebaeude
DE2653161A1 (de) * 1976-11-23 1978-05-24 Schako Metallwarenfabrik Luftverteilkasten fuer belueftungs- und klimaanlagen
GB1594964A (en) * 1978-02-08 1981-08-05 Sian Pah Tio Square ceiling diffuser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2866372A1 (fr) * 2004-02-12 2005-08-19 Hexadome Sa Exutoire de desenfumage comportant des moyens de canalisation d'une partie de la fumee

Also Published As

Publication number Publication date
AU8865582A (en) 1983-05-12

Similar Documents

Publication Publication Date Title
US4850265A (en) Air intake apparatus
US3771430A (en) Louver assembly
KR100408598B1 (ko) 직교류송풍기
US4572059A (en) Static ventilator construction
CN104174498B (zh) 一种烟气均布器及烟气均布方法
US3426667A (en) Air intake apparatus
EP0075468A1 (fr) Appareil de ventilation pour bâtiments
KR20020079534A (ko) 항공기 엔진회전점검용 격납고
EP2264376B1 (fr) Ventilateur avec filtre et soupape de retenue pour le remplacement de l'air dans une pièce
WO2017137620A1 (fr) Évent actionné par un fluide
GB2211287A (en) Roof ventilator
JPH0311655Y2 (fr)
US2492242A (en) Ventilating apparatus
KR200458718Y1 (ko) 공조장치용 고소형 가변 선회 취출구
US1783406A (en) Ventilator
JPH031746Y2 (fr)
CN207944868U (zh) 一种建筑门窗导水装置
US3498205A (en) Rooftop air intake unit louver
KR101158808B1 (ko) 루프 환기 제어시스템
KR101183561B1 (ko) 루프 환기 제어시스템
US3309979A (en) Ventilating device
JPH0587440U (ja) 防雨型給気口
CN215002078U (zh) 一种实验用通风管道防水回流组件
JP3460006B2 (ja) 吹出口装置及び吹出口の形成方法
US3063358A (en) Roof-type ventilation device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI LU NL SE

17P Request for examination filed

Effective date: 19830905

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840910

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WEINERT, BERND