EP0131198B1 - Ventilation par le toit - Google Patents

Ventilation par le toit Download PDF

Info

Publication number
EP0131198B1
EP0131198B1 EP84107334A EP84107334A EP0131198B1 EP 0131198 B1 EP0131198 B1 EP 0131198B1 EP 84107334 A EP84107334 A EP 84107334A EP 84107334 A EP84107334 A EP 84107334A EP 0131198 B1 EP0131198 B1 EP 0131198B1
Authority
EP
European Patent Office
Prior art keywords
roof
tubular body
rotor
shell
exhauster according
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.)
Expired
Application number
EP84107334A
Other languages
German (de)
English (en)
Other versions
EP0131198A2 (fr
EP0131198A3 (en
Inventor
Wilhelm Fritz Morschheuser
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.)
Rogal Gesellschaft fur Angewandte Lufttechnik Mbh
Original Assignee
ROBERTSON GAL GmbH
Rogal Gesellschaft fur Angewandte Lufttechnik Mbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ROBERTSON GAL GmbH, Rogal Gesellschaft fur Angewandte Lufttechnik Mbh filed Critical ROBERTSON GAL GmbH
Publication of EP0131198A2 publication Critical patent/EP0131198A2/fr
Publication of EP0131198A3 publication Critical patent/EP0131198A3/de
Application granted granted Critical
Publication of EP0131198B1 publication Critical patent/EP0131198B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F24F13/24—Means for preventing or suppressing noise
    • 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
    • F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator

Definitions

  • the invention relates to a roof vent with an inlet diffuser that can be placed on a roof opening and an adjoining cylindrical pipe attachment, for which there is a covering cone at a vertical distance, forming an axial gap, the latter being covered at a radial distance by a cylindrical jacket, the lower one Section of the tubular attachment, a motor is arranged with a rotor carrying the blades of an axial fan, and with a substantially cylindrical tubular body which ends immediately above the rotor with a gap existing only for its rotation and is of the same diameter as the rotor.
  • a fan is known from DE-A-2 318 885.
  • the roof fan described is very well suited for forced ventilation of industrial buildings and halls when the axial blower is switched on, since the axial blower lies in the air flow in a flow-favorable manner.
  • these roof ventilators enable less natural ventilation that is still effective for many purposes. For this it is important on the one hand that a roof elevation is achieved by the pipe attachment, so that the buoyancy of the heated air to be discharged is increased accordingly.
  • the outer, cylindrical jacket at the height of the outlet gap regardless of the direction of the wind, deflects it in the area of the roof vent such that a negative pressure is created in the area of the outlet gap, which leads to the suction of the air.
  • the roof vent works when the engine is switched off on the one hand on the basis of the chimney effect as a lift vent and on the other hand on the basis of the wind deflection as a wind deflector.
  • a roof vent of a similar type is shown in US-A-3,012,495.
  • a cover cone with a downward-pointing tip is provided, which normally rests with its peripheral edge on the upper edge of the tube attachment. This overlap cone is raised only when the axial fan motor is switched on, so that the air can then flow out through the annular gap which forms. Accordingly, a combination effect with natural ventilation according to the chimney principle or the wind deflector principle is not achieved despite the sufficient height of the pipe attachment.
  • cover cones tapering downward for the purpose of flow deflection are also known according to GB-A-321 808.
  • the overlap cones begin immediately above the rotor carrying the blades.
  • the object of the invention is to further increase the ventilation performance when the axial fan is switched on and at the same time to continue to reduce the noise level caused by the operation of the axial fan without the function of the natural ventilation being impaired.
  • the cylindrical tubular body fills out that central part of the cross section of the tubular attachment in which there is a vortex formation which is typical of axial fans and reduces the output. Since the tubular body extends to the cover cone and is designed with a continuously increasing diameter in the upper section, it simultaneously initiates the flow deflection in a loss-free manner, which is continued by the cover cone. The otherwise existing impact effect associated with high pressure loss is thus avoided.
  • the tubular body develops its sound-absorbing effect on the one hand due to its cylindrical section and on the other hand due to the section with increasing diameter, the latter of which adjoins the covering cone.
  • the damping effect of the new tubular body thus goes beyond the preferably low frequency range of the noise. Particularly in the embodiment of the tubular body which ends at the bottom, excellent sound absorption occurs because the acoustic energy in the tubular body itself is destroyed by the latter acting as a resonator.
  • drawing shows the side view of the new roof vent, with the right half in longitudinal section and the left half partially is broken.
  • the roof 11 has an opening 12, the short shaft 13 of which is covered by a box 14.
  • the latter is expediently a sheet metal construction which is connected to the inlet diffuser 1.
  • the pipe attachment 2 connects to the inlet diffuser 1.
  • the required overall height is achieved by placing a lower ring section 2 'and an upper ring section 2 "on top of each other. Both the inlet diffuser 1 and the two ring sections 2' and 2" are double-skinned.
  • the inner shell of the inlet diffuser 1 and the upper ring section 2 is also made of perforated sheet metal.
  • the inner shell of the ring section 2 ' is made of non-perforated sheet metal, since it must have greater strength in order to hold the struts 15 for the motor 5 .
  • the covering cone 3 can be seen, which is shown in the exemplary embodiment with the tip pointing upwards. In this way, an annular gap 16 remains free.
  • the cylindrical jacket 4 is arranged at a radial distance from this ring gap. which serves to deflect the wind in the manner already described. Further wind deflectors are provided above and below the annular gap 16 by the annular plates 17 and 18.
  • the motor 5 arranged centrally in the flow path carries the rotor 10, on the circumference of which the vanes 6 are provided.
  • the arrangement is such that the wing 6 still ends below the upper edge of the ring section 2 ', so that the ring section 2' still partially and the ring section 2 "remain completely free.
  • the cylindrical tubular body 7 now projects into this free space.
  • the drawing shows that a cavity 19 is created by the cylindrical tubular body in connection with the covering cone, which has the function of a sound-absorbing resonator in the manner described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

1. Ventilateur de toit équipé d'un diffuseur d'entrée (1) démontable, implantable sur une ouverture de toit et et d'une garniture tubulaire y faisant suite (2) pour lequel existe un cône de recouvrement (3) à un écartement vertical en formant une fente axiale, et recouvert à une distance axiale d'un manteau cylindrique (4), un moteur (5) avec un rotor (10) supportant les ailettes d'un ventilateur axial étant implanté dans la section inférieure de la garniture et avec un corps tubulaire en prépondérance cylindrique (7) s'achevant directement au-dessus du rotor avec la fente déterminée uniquement pour sa rotation et de même diamètre que le rotor (10), caractérisé en ce que le corps tubulaire (7) s'allonge jusqu'au cône de recouvrement (3), en s'élargissant de par un diamètre en croissance constante au-dessus de la garniture tubulaire (2) jusqu'à un endroit situé à l'intérieur du cône de recouvrement.
2. Ventilateur de toit selon la revendication 1, caractérisé en ce que le corps tubulaire (7) est exécuté en coquille double, une structure cellulaire existant entre sa coque extérieure (8) et sa coque intérieure (9).
3. Ventilateur de toit selon la revendication 2, caractérisé en ce que la structure cellulaire est à pores fermés.
4. Ventilateur de toit selon les revendications 2 et 3, caractérisé en ce que la coque extérieure (8) est réalisée par une feuille de matière plastique souple.
5. Ventilateur selon les revendications 2 à 4, caractérisé en ce que la coque extérieure (8) est percée.
6. Ventilateur de toit selon les revendications 1 à 5, caractérisé en ce que le corps tubulaire (7) à une extrémité ouverte vers le bas.
EP84107334A 1983-07-06 1984-06-26 Ventilation par le toit Expired EP0131198B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833324369 DE3324369A1 (de) 1983-07-06 1983-07-06 Dachentluefter
DE3324369 1983-07-06

Publications (3)

Publication Number Publication Date
EP0131198A2 EP0131198A2 (fr) 1985-01-16
EP0131198A3 EP0131198A3 (en) 1986-07-30
EP0131198B1 true EP0131198B1 (fr) 1988-11-02

Family

ID=6203307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107334A Expired EP0131198B1 (fr) 1983-07-06 1984-06-26 Ventilation par le toit

Country Status (2)

Country Link
EP (1) EP0131198B1 (fr)
DE (2) DE3324369A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2001219C2 (nl) * 2008-01-25 2009-07-30 Ubbink Bv Dakdoorvoer met axiaalventilator.
RU198629U1 (ru) * 2020-01-30 2020-07-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Пензенский государственный университет архитектуры и строительства" Дефлектор

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL262265A (fr) * 1960-03-11 1900-01-01
FR2128939A5 (fr) * 1971-03-09 1972-10-27 Dassault Aeronautique
DE2318885A1 (de) * 1973-04-14 1974-10-24 Gal Ges Fuer Angewandte Luftte Dachentluefter

Also Published As

Publication number Publication date
EP0131198A2 (fr) 1985-01-16
EP0131198A3 (en) 1986-07-30
DE3474995D1 (en) 1988-12-08
DE3324369A1 (de) 1985-01-17

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