EP1389288B1 - Ventilateur d'evacuation d'air - Google Patents

Ventilateur d'evacuation d'air Download PDF

Info

Publication number
EP1389288B1
EP1389288B1 EP02745463A EP02745463A EP1389288B1 EP 1389288 B1 EP1389288 B1 EP 1389288B1 EP 02745463 A EP02745463 A EP 02745463A EP 02745463 A EP02745463 A EP 02745463A EP 1389288 B1 EP1389288 B1 EP 1389288B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
axis
blade
air
inlet
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 - Lifetime
Application number
EP02745463A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1389288A1 (fr
Inventor
Pierre Jardinier
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.)
Conseils Etudes et Recherches en Gestion de lAir CERGA
Original Assignee
Conseils Etudes et Recherches en Gestion de lAir CERGA
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 Conseils Etudes et Recherches en Gestion de lAir CERGA filed Critical Conseils Etudes et Recherches en Gestion de lAir CERGA
Publication of EP1389288A1 publication Critical patent/EP1389288A1/fr
Application granted granted Critical
Publication of EP1389288B1 publication Critical patent/EP1389288B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/165—Axial entry and discharge
    • 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
    • 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
    • F24F2007/001—Ventilation with exhausting air ducts

Definitions

  • the present invention relates to a fan intended to be associated with an exhaust duct out of at least one room, for ensure the renewal of air inside it.
  • Modern premises are usually equipped with facilities controlled mechanical ventilation, these installations comprising a group suction that will extract a certain volume of air into the rooms technical, such as kitchen, bathroom, toilet, an equivalent volume of air to that extract being admitted in the living rooms, such as living room or bedroom by air inlet vents provided in these parts, for example in window frames.
  • An example of a ventilation installation is shown in GB-1 160 136.
  • Another solution implemented in particular in older buildings, consists of making an air outlet in the rooms techniques to a wide section duct opening into the roof, the exit of air by natural draft when the driving pressures due to the wind and thermal draw are sufficient, for example when motor pressures are greater than those generated by the action temperature difference of 10 ° C between the inside and the outside premises and a wind of 3m / s.
  • Natural draft can be satisfactory in winter, when the outside temperature is noticeable higher than the temperature inside the room.
  • there may be a temperature inversion causing a air circulation in the opposite direction, that is to say an air intake by the normally leads to extraction.
  • a fan providing additional driving pressure when the draft lack of natural resources, especially during the summer months, through the use of axial fan, comprising a plurality of blades extending from the fan shaft outwards, these blades having an inclination ensuring a displacement of air.
  • the motorization necessary for the drive of the fan is important, and when the fan is at stop, to allow a renewal of air by natural draft, the blades create significant pressure drops that strongly limit the flow of extracted air.
  • the object of the invention is to provide a fan intended to be associated with an exhaust duct, the structure of which is such that the fan only creates negligible losses when it is shutdown, thus allowing for the evacuation of the air by natural draft, and which, in operation ensures an air flow comparable to that obtained with a natural current draw corresponding, for example, to a difference of temperature of 15 ° C between inside and outside and a wind speed 4 m / s, while consuming a very small amount of electricity, thus allowing, if necessary, its feeding by means of a panel solar placed in roof next to the fan.
  • the object of the invention is therefore to provide a facility that runs continuously with energy natural, that is to say, wind and draft driven pressures thermal, especially in winter and during the seasons intermediates, and using solar energy that powers the motor of the fan in summer time.
  • the blades of the fan wheel offer only a very low resistance to the flow of air and generate reduced pressure losses when the engine is stopped.
  • their curved portion is in an area which is located outside the flow of the airflow, given the fact that the surface of the entrance of the shell is smaller than the surface of the ferrule.
  • the fan according to the invention enjoys an excellent efficiency when the electric motor drives the propeller, the air driven by the propeller hitting the guide vanes that channel the air upstream downstream. The efficiency of this fan is very good and its reduced consumption which allows to power the engine with the help of solar energy.
  • each blade is flat and contained in a longitudinal plane including the axis of the ferrule.
  • each blade has an entrance edge perpendicular to the axis of the ferrule and extending from the point of the edge of outlet of the most upstream blade.
  • each blade is at a maximum distance of the axis of the shell at its junction with the edge of entry, then it follows a curve which, from the upstream to the downstream, is gradually approaching of the axis of said ferrule.
  • each blade decreases from upstream downstream.
  • each blade has an edge perpendicular to the axis of the ferrule, which extends from the point of edge of output of the most upstream blade on a part of the radius of the ferrule, this edge being extended by an edge oriented from upstream to downstream and from the outside to the inside, thus delimiting a blade in the general shape of half-crescent.
  • each directional dawn is located near the route of upstream portions of the blade outlet edges, each blade having a curved portion, that is to say not extending axially to the ferrule, and angle of attack with an orientation close to that of the air streams coming out of the blades of the wheel, and lying outside the main flow flow in natural draft when the fan is stopped and extending, for example, over a length substantially equal to the diameter the entrance of the ferrule, each curved portion being extended downstream by a flat part parallel to the axis of the ferrule.
  • the airflow in natural draft, which occupies at the level of the entrance the section of the latter widens only slightly, in downstream, over a distance equal to the diameter of the inlet. So, the airflow is hardly disturbed by the curved blade parts guidelines. Beyond this distance the air flow is in contact with parts of blades which are parallel to it and which oppose negligible resistance. At this level, the blades can also be wider width and protrude from the inner side, the virtual cylinder located in the extension of the entrance of the shell.
  • Figure 1 shows a building designated by the reference 2 in which are provided several superposed rooms 3, each room having at least one mouth 4 communicating with a vertical ventilation duct 5 opening at the roof 11 of the building.
  • the upper part of the duct 5 is connected to a ferrule cylindrical 6 outer diameter, the inner part of the ferrule being connected to the duct by a radial shoulder 7.
  • the entrance 8 of the ferrule, of section corresponding to that of the conduit is less than that of ferrule 6.
  • each blade is constituted by a flat plate whose edge 15 is perpendicular to the axis of the shell and whose output edge 16 is getting closer to the axis of the ferrule going from upstream downstream. It should be noted that the outer end 17 of the entrance edge 15 of each blade 14 is located opposite the radial shoulder 7. The game between the edge 15 and the shoulder 7 is as small as possible.
  • each blade has an input edge 15 with an external part perpendicular to the axis of the ferrule which is extended by another part following downstream the curved line 18 shown on the FIGS. 2 and 3, thus providing a blade in the general shape of a half-croissant, whose width may increase from upstream to downstream.
  • Every dawn 19 comprises a first portion 19a, extending to a distance of the inlet 8 substantially equal to the diameter thereof.
  • This part 19a of the dawn which is contained in the space delimited by the cylindrical shell 6 and a virtual cylinder extending the inlet 8 of the shell, is curved and angle of attack having an orientation close to that of the air streams coming out of the blades of the wheel.
  • This part 19a is extended towards downstream by a flat portion 19b parallel to the axis of the ferrule.
  • the wheel can provide the air with this flow a dynamic pressure, kinetic energy equal to 0.5 x ⁇ x Vr 2 , where ⁇ is the density of the air.
  • the straightening vanes 19a channel the air streams fastest peripherals coming out of wheel 13, to transform progressively their rotational movement into a displacement which increases the flow and the useful pressure provided by the fan.
  • the diameter of the wheel 13 decreases from upstream downstream to promote air circulation in the desired direction.
  • the larger diameter upstream portion provides more air pressure than its downstream part. This provision also makes it possible to gradually increase the passage formed between the wheel 13 and the ferrule 6 to adapt it to the quantity increasing air out of the wheel when one moves away from the entrance 8.
  • the invention provides a great improvement to the existing technique by providing a fan simple structure, the blades of which induce only a small loss of load and whose curved portions of the guide vanes are out of the flow when it is stopped. It is therefore possible to implement a extracting air by natural draft when the temperature conditions and of wind permit. When the temperature and wind conditions do not provide sufficient natural draft, the fan can ensure the extraction of air with a very low power consumption, making possible the power of the electric motor by solar energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Gas Separation By Absorption (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Duct Arrangements (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Chimneys And Flues (AREA)
  • Catching Or Destruction (AREA)
  • Ventilation (AREA)
EP02745463A 2001-05-22 2002-05-21 Ventilateur d'evacuation d'air Expired - Lifetime EP1389288B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0106738A FR2825142B1 (fr) 2001-05-22 2001-05-22 Ventilateur destine a etre associe a un conduit d'evacuation d'air hors d'au moins un local
FR0106738 2001-05-22
PCT/FR2002/001706 WO2002095298A1 (fr) 2001-05-22 2002-05-21 Ventilateur d'evacuation d'air

Publications (2)

Publication Number Publication Date
EP1389288A1 EP1389288A1 (fr) 2004-02-18
EP1389288B1 true EP1389288B1 (fr) 2005-05-18

Family

ID=8863550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02745463A Expired - Lifetime EP1389288B1 (fr) 2001-05-22 2002-05-21 Ventilateur d'evacuation d'air

Country Status (15)

Country Link
US (1) US6814661B2 (lt)
EP (1) EP1389288B1 (lt)
JP (1) JP3962692B2 (lt)
AT (1) ATE295951T1 (lt)
CA (1) CA2447421C (lt)
DE (1) DE60204223T2 (lt)
DK (1) DK1389288T3 (lt)
ES (1) ES2242040T3 (lt)
FR (1) FR2825142B1 (lt)
LT (1) LT5171B (lt)
MA (1) MA26113A1 (lt)
PL (1) PL204058B1 (lt)
RU (1) RU2287088C2 (lt)
TN (1) TNSN03115A1 (lt)
WO (1) WO2002095298A1 (lt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100529002B1 (ko) * 2003-12-31 2005-11-15 학교법인 포항공과대학교 덮개가 구비된 스월러를 이용하는 국소배기장치
US7682231B2 (en) 2004-01-20 2010-03-23 Greenheck Fan Corporation Exhaust fan assembly
US7320636B2 (en) * 2004-01-20 2008-01-22 Greenheck Fan Corporation Exhaust fan assembly having flexible coupling
AU2005287891C1 (en) * 2004-09-23 2009-07-16 Csr Building Products Limited Hybrid ventilator
US7455582B2 (en) * 2005-11-30 2008-11-25 Barrett Cory G Solar powered fan for portable enclosure
DE102007055507A1 (de) * 2007-11-21 2009-06-04 Georg Emanuel Koppenwallner Schräglippenspirale
CZ2012180A3 (cs) * 2012-03-14 2013-10-23 Morávek@Petr Vzduchotechnické zarízení s volným obezným kolem vestaveným do kruhového potrubí
RU183910U1 (ru) * 2018-05-31 2018-10-08 федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный технический университет" Устройство для вентиляции помещений
KR102611669B1 (ko) * 2022-03-24 2023-12-07 박태업 건물 덕트용 환기장치

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1958145A (en) * 1932-05-23 1934-05-08 Jones William Anthony Fan
US2397171A (en) * 1943-12-06 1946-03-26 Del Conveyor & Mfg Company Fan and motor mounting
CH399698A (de) * 1963-04-11 1965-09-30 Rimann Kurt Dachventilator
US3329415A (en) * 1964-12-21 1967-07-04 Chicago Eastern Corp Blower cooler
DK118475B (da) * 1965-08-02 1970-08-24 Nordisk Ventilator Radialventilator med axial udstrømning.
US5246339A (en) * 1988-06-08 1993-09-21 Abb Flakt Ab Guide vane for an axial fan
DE19510811A1 (de) * 1995-03-24 1996-09-26 Klein Schanzlin & Becker Ag Faser abweisende Wandflächengestaltung
FR2782781B1 (fr) * 1998-09-02 2000-09-29 Andre Amphoux Dispositif de securite pour systemes d'evacuation de fluides gazeux
US6733240B2 (en) * 2001-07-18 2004-05-11 General Electric Company Serrated fan blade

Also Published As

Publication number Publication date
DE60204223T2 (de) 2006-01-26
ES2242040T3 (es) 2005-11-01
ATE295951T1 (de) 2005-06-15
EP1389288A1 (fr) 2004-02-18
US20040132400A1 (en) 2004-07-08
CA2447421A1 (fr) 2002-11-28
JP2004525338A (ja) 2004-08-19
FR2825142A1 (fr) 2002-11-29
LT5171B (lt) 2004-10-25
PL204058B1 (pl) 2009-12-31
LT2003097A (lt) 2004-06-25
DK1389288T3 (da) 2005-09-19
US6814661B2 (en) 2004-11-09
FR2825142B1 (fr) 2003-08-29
CA2447421C (fr) 2008-12-30
PL363833A1 (en) 2004-11-29
RU2287088C2 (ru) 2006-11-10
TNSN03115A1 (fr) 2005-04-08
WO2002095298A1 (fr) 2002-11-28
DE60204223D1 (de) 2005-06-23
RU2003134011A (ru) 2005-05-10
JP3962692B2 (ja) 2007-08-22
MA26113A1 (fr) 2004-04-01

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