ZA817088B - Improvements relating to ventilators - Google Patents

Improvements relating to ventilators

Info

Publication number
ZA817088B
ZA817088B ZA817088A ZA817088A ZA817088B ZA 817088 B ZA817088 B ZA 817088B ZA 817088 A ZA817088 A ZA 817088A ZA 817088 A ZA817088 A ZA 817088A ZA 817088 B ZA817088 B ZA 817088B
Authority
ZA
South Africa
Prior art keywords
shutter
fan
wind
windshield
closes
Prior art date
Application number
ZA817088A
Inventor
Raymond Alfred Fran Burtenshaw
Original Assignee
Colt Int 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
Application filed by Colt Int Ltd filed Critical Colt Int Ltd
Publication of ZA817088B publication Critical patent/ZA817088B/en

Links

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
    • F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Air-Flow Control Members (AREA)

Abstract

A powered, direct discharge ventilator comprises a base (B) having an extraction fan duct defined by a cylindrical wall portion (11) enclosing a fan impeller (not shown) of a fan (K) mounted on the base. A shallow windshield (D) shelters a non-return shutter (S) which closes the extraction fan duct when the fan is not operating. The shutter (S) is hinged on a pair of arms (H) to float up on the discharging airstream to take up the position shown chain-dotted in Fig. 1 when the fan is operated. When the fan is stopped, the shutter (S) closes gravitationally. To assist in holding the shutter (S) closed under high wind conditions, a wind deflector (W), carried by a bird-guard (G), directs the wind in a downwardly directed stream onto the top of the shutter (S). Where a much higher windshield is used, the wind deflector acts in a similar manner to prevent any reduction of pressure within the windshield due to the <<wind-over effect>> lifting the non-return shutter.
ZA817088A 1980-10-16 1981-10-14 Improvements relating to ventilators ZA817088B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8033414 1980-10-16

Publications (1)

Publication Number Publication Date
ZA817088B true ZA817088B (en) 1982-09-29

Family

ID=10516715

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA817088A ZA817088B (en) 1980-10-16 1981-10-14 Improvements relating to ventilators

Country Status (6)

Country Link
EP (1) EP0050488B1 (en)
AT (1) ATE7956T1 (en)
AU (1) AU545302B2 (en)
DE (1) DE3164215D1 (en)
NZ (1) NZ198656A (en)
ZA (1) ZA817088B (en)

Families Citing this family (5)

* 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
GB2203232B (en) * 1986-11-13 1991-01-16 Colt Int Ltd Improvements relating to ventilators
CN108426336B (en) * 2018-05-31 2023-09-29 深圳市万居科技股份有限公司 Dual-purpose exhaust cap
CN108626834B (en) * 2018-05-31 2023-09-29 深圳市万居科技股份有限公司 Multipurpose exhaust cap
CN114831028B (en) * 2022-04-22 2023-09-01 扬州大学 Breeding device convenient to ventilate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492242A (en) * 1943-08-28 1949-12-27 James B Shaver Ventilating apparatus
GB1061188A (en) * 1964-04-13 1967-03-08 Colt Ventilation & Heating Ltd Improvements in or relating to ventilators
GB1151191A (en) * 1965-05-19 1969-05-07 Colt Ventilation & Heating Ltd Improvements in or relating to Ventilators

Also Published As

Publication number Publication date
EP0050488B1 (en) 1984-06-13
ATE7956T1 (en) 1984-06-15
EP0050488A2 (en) 1982-04-28
EP0050488A3 (en) 1982-09-08
AU545302B2 (en) 1985-07-11
DE3164215D1 (en) 1984-07-19
AU7638181A (en) 1982-04-22
NZ198656A (en) 1985-01-31

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