EP1389288A1 - Ventilateur d'evacuation d'air - Google Patents
Ventilateur d'evacuation d'airInfo
- Publication number
- EP1389288A1 EP1389288A1 EP02745463A EP02745463A EP1389288A1 EP 1389288 A1 EP1389288 A1 EP 1389288A1 EP 02745463 A EP02745463 A EP 02745463A EP 02745463 A EP02745463 A EP 02745463A EP 1389288 A1 EP1389288 A1 EP 1389288A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ferrule
- blade
- axis
- air
- upstream
- 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.)
- Granted
Links
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 air exhaust duct from at least one room, to ensure the renewal of air inside thereof.
- premises whether premises for residential use or for office use include devices ensuring air renewal, on the one hand for reasons of keeping the premises in good condition, those -this needing to be ventilated so that the constituent materials retain their properties, and on the other hand for reasons of comfort of the occupants.
- Modern premises are generally equipped with controlled mechanical ventilation installations, these installations comprising a suction group which will extract a certain volume of air in technical rooms, such as kitchen, bathroom, WC, a volume of air equivalent to that extracted being admitted into living rooms, such as living room or bedroom by air intake vents provided in these rooms, for example in window frames.
- technical rooms such as kitchen, bathroom, WC
- a volume of air equivalent to that extracted being admitted into living rooms such as living room or bedroom by air intake vents provided in these rooms, for example in window frames.
- Another solution implemented in particular in older buildings, consists in producing an air outlet in the technical rooms towards a wide section duct opening into the roof, the air outlet being by natural draft when the driving pressures due to wind and thermal draft are sufficient, for example when these driving pressures are higher than those generated by the joint action of a temperature difference of 10 ° C between the interior and exterior of the premises and a wind of 3m / s. Natural draft can be satisfactory in winter, when the outside temperature is significantly higher than the temperature inside the room. However, in summer, there may be a temperature inversion causing air circulation in the opposite direction, that is to say an admission of air through the duct normally intended for extraction.
- a fan ensuring additional driving pressure when the natural draft is insufficient, in particular in summer, by the use of an axial fan, comprising a plurality of blades extending from the fan shaft outward, these blades having an inclination ensuring air movement.
- the motorization required for driving the fan is important, and when the fan is stopped, to allow air renewal by natural draft, the blades create significant pressure drops which greatly limit the flow of extract air.
- the object of the invention is to provide a fan intended to be associated with an air exhaust duct, the structure of which is such that the fan creates only negligible pressure losses when it is stopped, thus allowing an evacuation of the air by natural draft, and which, in operation ensures an air flow comparable to that obtained with a current natural draft corresponding, for example, to a temperature difference of 15 ° C between the inside and outside and a wind speed of 4 m / s, while consuming a very small amount of electricity, thus allowing, if necessary, its power using a solar panel placed on the roof next to it of the fan.
- the object of the invention is therefore to provide an installation which operates permanently with natural energy, that is to say driving pressures due to wind and thermal draft, in particular in winter and during the intermediate seasons, and using solar energy that powers the fan motor in summer.
- the fan it relates to includes:
- an electric motor mounted axially in the ferrule, of small diameter compared to that of the ferrule, and on the shaft of which is fixed a wheel composed of blades, each of a shape such that all the sections of a blade by planes parallel to the axis of the shell are parallel to said axis, the maximum diameter of the blades being between that of the shell and that of the entry into the shell, and decreasing from upstream to downstream, that is to say say from the entrance side towards the other end, and
- Air flow guide vanes integral with the inner face of the ferrule, distributed around the periphery of the ferrule and each comprising at least one curved part which, located on the side of the inlet of the ferrule, is housed in the annular space between the shell and the virtual cylindrical surface extending the air intake. Given the shape of the fan wheel blades, they only offer very little resistance to air flow and only generate reduced pressure drops when the engine is stopped. .
- their curved part is located in an area which is situated outside the flow of the air flow, taking into account the fact that the surface of the inlet of the ferrule is smaller than the surface of the ferrule.
- the fan according to the invention enjoys excellent efficiency when the electric motor drives the propeller, the air driven by the propeller striking the guide vanes which channel the air from upstream to downstream.
- the efficiency of this fan is very good and its consumption reduced, which allows the motor to be powered with solar energy.
- each blade is planar and contained in a longitudinal plane including the axis of the ferrule.
- each blade has an entry edge perpendicular to the axis of the ferrule and which extends from the point of the exit edge of the blade most upstream.
- each blade is at a maximum distance from the axis of the ferrule at its junction with the input edge, then it follows a curve which, from upstream to downstream, gradually approaches of the axis of said ferrule.
- each blade decreases from upstream to downstream.
- each blade has an entry edge perpendicular to the axis of the ferrule, which extends from the point of the exit edge of the blade most upstream over a part of the radius of the ferrule, this edge being extended by an edge oriented from upstream to downstream and from outside to inside, thus delimiting a blade in the general shape of a semi-crescent. It is then possible to have a blade whose width increases from upstream to downstream.
- each guide blade is located near the path of the upstream parts of the outlet edges of the blades, each blade having a curved part, that is to say does not not extending axially to the shell, and having an angle of attack having an orientation close to that of air streams coming out of the impeller blades, and being outside the main flow of the flow in natural draft when the fan is stopped and extending, for example, over a length substantially equal to the diameter of l entry of the ferrule, each curved part being extended downstream by a flat part parallel to the axis of the ferrule.
- Figure 1 is a very schematic view of a building equipped with a ventilation duct provided with this fan;
- Figure 1 shows a building designated by the general reference 2 in which are arranged several superimposed rooms 3, each room having at least one mouth 4 communicating with a vertical ventilation duct 5 opening at the level of the roof 1 1 of the building.
- the upper part of the duct 5 is connected to a cylindrical ferrule 6 of greater outside diameter, the inner part of the ferrule being connected to the duct by a radial shoulder 7.
- the inlet 8 of the ferrule, of section corresponding to that of the duct is less than that of the ferrule 6.
- a wheel 1 3 comprising a plurality of blades 14.
- Each blade is constituted by a flat plate whose input edge 1 5 is perpendicular to the axis of the ferrule and whose output edge 1 6 gradually approaches the axis of the ferrule from upstream to downstream. It should be noted that the outer end 1 7 of the inlet edge 1 5 of each blade 14 is located opposite the radial shoulder 1.
- each blade has an input edge 1 5 with an external part perpendicular to the axis of the shell which is extended by another part following downstream the curved line 1 8 shown in Figures 2 and 3, thus providing a blade in the general shape of a half crescent, the width of which can increase from upstream to downstream.
- Each blade 1 9 has a first part 1 9a, extending to a distance from the inlet 8 substantially equal to the diameter of the latter.
- This part 1 9a of the blade 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 has an angle of attack having an orientation close to that of the air streams coming out of the wheel blades.
- This part 1 9a is extended downstream by a flat part 1 9b parallel to the axis of the ferrule.
- the speed Vs of the air flow is close to the result of the inlet speed Ve and the speed of rotation of the wheel Vr at level of its exit point.
- the wheel can supply the air in this flow with a dynamic pressure, kinetic energy equal to 0.5 xpx Vr 2 , where p is the density of the air.
- the straightening vanes 1 9a channel the fastest peripheral air streams leaving the wheel 1 3, to gradually transform their rotational movement into a longitudinal movement which increases the useful flow and pressure supplied by the fan.
- These rectified flows which have the strongest dynamic pressures share a part of their energy with the flows leaving the parts of the wheel closer to its axis and entrain them, by induction, to occupy in a more homogeneous way all the passage surface of the ferrule.
- the diameter of the wheel 1 3 decreases from upstream to downstream to promote the circulation of air in the desired direction.
- the larger diameter upstream portion provides more air pressure than its downstream portion. This arrangement also makes it possible to gradually increase the passage formed between the wheel 1 3 and the ferrule 6 to adapt it to the increasing amount of air leaving the wheel when one moves away from its inlet 8.
- the invention brings a great improvement to the existing technique by providing a ventilator of simple structure, the blades of which induce only a small pressure drop and the curved parts of the guide vanes of which are out of the air flow when it is stopped. It is therefore possible to use air extraction by natural draft when the temperature and wind conditions allow it. When the temperature and wind conditions do not provide sufficient natural draft, the fan can ensure the extraction of air with very low electrical consumption, making it possible to supply the electric motor with solar energy.
- the invention is not limited to the sole embodiment of this fan described above by way of example, on the contrary it embraces all variants. It is thus in particular that the shape of the blades could be different, and in particular that each blade could not be flat without departing from the scope of the invention.
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)
- Gas Separation By Absorption (AREA)
- Jet Pumps And Other Pumps (AREA)
- Percussion Or Vibration Massage (AREA)
- Ventilation (AREA)
- Catching Or Destruction (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Duct Arrangements (AREA)
- Chimneys And Flues (AREA)
Description
Claims
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 true EP1389288A1 (fr) | 2004-02-18 |
EP1389288B1 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 (fr) |
EP (1) | EP1389288B1 (fr) |
JP (1) | JP3962692B2 (fr) |
AT (1) | ATE295951T1 (fr) |
CA (1) | CA2447421C (fr) |
DE (1) | DE60204223T2 (fr) |
DK (1) | DK1389288T3 (fr) |
ES (1) | ES2242040T3 (fr) |
FR (1) | FR2825142B1 (fr) |
LT (1) | LT5171B (fr) |
MA (1) | MA26113A1 (fr) |
PL (1) | PL204058B1 (fr) |
RU (1) | RU2287088C2 (fr) |
TN (1) | TNSN03115A1 (fr) |
WO (1) | WO2002095298A1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100529002B1 (ko) * | 2003-12-31 | 2005-11-15 | 학교법인 포항공과대학교 | 덮개가 구비된 스월러를 이용하는 국소배기장치 |
US7320636B2 (en) * | 2004-01-20 | 2008-01-22 | Greenheck Fan Corporation | Exhaust fan assembly having flexible coupling |
US7682231B2 (en) | 2004-01-20 | 2010-03-23 | Greenheck Fan Corporation | Exhaust fan assembly |
ES2433716T3 (es) | 2004-09-23 | 2013-12-12 | Csr Building Products Limited | Ventilador híbrido |
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)
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 |
-
2001
- 2001-05-22 FR FR0106738A patent/FR2825142B1/fr not_active Expired - Lifetime
-
2002
- 2002-05-21 AT AT02745463T patent/ATE295951T1/de not_active IP Right Cessation
- 2002-05-21 PL PL363833A patent/PL204058B1/pl unknown
- 2002-05-21 DE DE60204223T patent/DE60204223T2/de not_active Expired - Lifetime
- 2002-05-21 WO PCT/FR2002/001706 patent/WO2002095298A1/fr active IP Right Grant
- 2002-05-21 EP EP02745463A patent/EP1389288B1/fr not_active Expired - Lifetime
- 2002-05-21 RU RU2003134011/06A patent/RU2287088C2/ru active
- 2002-05-21 CA CA002447421A patent/CA2447421C/fr not_active Expired - Fee Related
- 2002-05-21 US US10/477,184 patent/US6814661B2/en not_active Expired - Fee Related
- 2002-05-21 ES ES02745463T patent/ES2242040T3/es not_active Expired - Lifetime
- 2002-05-21 JP JP2002591730A patent/JP3962692B2/ja not_active Expired - Fee Related
- 2002-05-21 DK DK02745463T patent/DK1389288T3/da active
- 2002-05-22 TN TNPCT/FR2002/001706A patent/TNSN03115A1/fr unknown
-
2003
- 2003-11-12 LT LT2003097A patent/LT5171B/lt not_active IP Right Cessation
- 2003-11-21 MA MA27412A patent/MA26113A1/fr unknown
Non-Patent Citations (1)
Title |
---|
See references of WO02095298A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2447421A1 (fr) | 2002-11-28 |
DK1389288T3 (da) | 2005-09-19 |
DE60204223T2 (de) | 2006-01-26 |
JP3962692B2 (ja) | 2007-08-22 |
PL204058B1 (pl) | 2009-12-31 |
US6814661B2 (en) | 2004-11-09 |
US20040132400A1 (en) | 2004-07-08 |
RU2003134011A (ru) | 2005-05-10 |
DE60204223D1 (de) | 2005-06-23 |
ES2242040T3 (es) | 2005-11-01 |
JP2004525338A (ja) | 2004-08-19 |
LT2003097A (en) | 2004-06-25 |
ATE295951T1 (de) | 2005-06-15 |
EP1389288B1 (fr) | 2005-05-18 |
WO2002095298A1 (fr) | 2002-11-28 |
CA2447421C (fr) | 2008-12-30 |
LT5171B (lt) | 2004-10-25 |
MA26113A1 (fr) | 2004-04-01 |
PL363833A1 (en) | 2004-11-29 |
RU2287088C2 (ru) | 2006-11-10 |
TNSN03115A1 (fr) | 2005-04-08 |
FR2825142A1 (fr) | 2002-11-29 |
FR2825142B1 (fr) | 2003-08-29 |
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