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US20060110272A1 - Venturi fan - Google Patents

Venturi fan Download PDF

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Publication number
US20060110272A1
US20060110272A1 US11/237,299 US23729905A US2006110272A1 US 20060110272 A1 US20060110272 A1 US 20060110272A1 US 23729905 A US23729905 A US 23729905A US 2006110272 A1 US2006110272 A1 US 2006110272A1
Authority
US
United States
Prior art keywords
fan
recited
motor
air
blade assembly
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.)
Abandoned
Application number
US11/237,299
Other languages
English (en)
Inventor
Mark Moore
Vance Patterson
Thomas Salisbury
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.)
Patterson Fan Co
Original Assignee
Patterson Fan Co
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 Patterson Fan Co filed Critical Patterson Fan Co
Priority to US11/237,299 priority Critical patent/US20060110272A1/en
Priority to EP05852085A priority patent/EP1815141A2/en
Priority to MX2007006008A priority patent/MX2007006008A/es
Priority to CA002587859A priority patent/CA2587859A1/en
Priority to AU2005309642A priority patent/AU2005309642A1/en
Priority to PCT/US2005/042508 priority patent/WO2006058100A2/en
Assigned to PATTERSON FAN COMPANY reassignment PATTERSON FAN COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOORE, MARK, PATTERSON, VANCE M., SALISBURY, THOMAS
Publication of US20060110272A1 publication Critical patent/US20060110272A1/en
Abandoned 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps

Definitions

  • the present invention relates to fans generally, and to fans used in industrial and commercial settings in particular.
  • a fan The purpose of a fan is move air in order to ventilate and cool an area.
  • air conditioning may be impractical, fans are vital to employees' health and comfort.
  • fans used in commercial and industrial environments.
  • One type includes a fan blade enclosed within a wire frame housing or “cage”, sometimes mounted on a pedestal.
  • the shaft of a motor outside the housing may project into the housing to turn the blades.
  • These fans work fine in smaller quarters. Increasing the speed of the motor and the pitch of the blade allows this type of fan to throw more air, but increases noise.
  • Another type of fan is a venturi fan that has a metal, venturi-shaped housing with a motor and a set of blades mounted therein. The set of blades is rotated by the motor and thus accelerates air through the housing.
  • These fans move a large volume of air and project it over large distances, which fact is especially important in large industrial buildings such as distribution centers, but they are relatively noisy.
  • the present invention is a venturi fan capable of producing a significant, directed flow of air but with significantly reduced noise compared to prior art venturi fans.
  • the present fan has a body comprised of a generally cylindrical wire basket for carrying a motor and fan blade assembly, and a flared intake carried at the rear of the wire basket.
  • the front of the basket carries an exit channel, which may also have a flare but is otherwise preferably substantially cylindrical in shape.
  • the rear-flared intake allows for a smooth feed of air into the basket and past the motor and the air-accelerating fan blade assembly.
  • the wire basket in a preferred embodiment, acts as a conduit for the flow-path air but also admits additional air into the flow path and channels the flow of air produced by the fan while allowing fan noise to dissipate through the sides.
  • the basket also avoids generation of some fan noise and is a safety feature, preventing injury in its role as both the side and rear finger guard.
  • An important feature of the present invention is the relatively open sides of the present fan, compared to prior art venturi fans.
  • the relatively open sides contribute significantly and in a number of ways to noise reduction, chiefly by allowing noise to escape, while not significantly degrading the flow of air. Indeed, the openness of the sides increases the amount of air available to the fan.
  • the combination of the rear flare intake and the wire basket is a significant feature of the present invention. This combination allows the flow of air generated by the fan blade assembly to be created and directed significant distances with little diffusion.
  • wire basket to support the motor and fan blade assembly is yet another important feature of the present invention. This arrangement reduces material, weight and obstructions to air flow while providing a sufficiently sturdy securement for the motor and fan blade assembly.
  • FIG. 1 is a perspective view of a fan, according to a preferred embodiment of the present invention.
  • FIG. 2 is a side view of the fan of FIG. 1 , according to a preferred embodiment of the present invention
  • FIG. 3 is a front view of the fan of FIG. 1 ;
  • FIG. 4 is a rear view of the Fan of FIG. 1 ;
  • FIG. 5 is a perspective view of the Fan of FIG. 1 with the front finger guard and fan blade assembly removed to show the mounting of the motor;
  • FIG. 6 is a detailed view of the interior of the fan of FIG. 2 showing the manner in which the motor is mounted, according to a preferred embodiment of the present invention.
  • the present invention is an improvement in venturi-style fans. Venturi fans direct a significant quantity of air in a forward direction and are suitable for large buildings such as warehouses. Unfortunately, prior art venturi fans are relatively noisy.
  • FIG. 1 illustrates in perspective the present venturi fan 10 .
  • Fan 10 has a housing 12 that is flared on both the front 14 and the rear 16 , and has a front finger guard 18 .
  • Inside housing 12 is a motor 22 and a fan blade assembly 24 .
  • venturi fan 10 is rotationally symmetric so it appears the same from all sides.
  • venturi fan 10 shown in FIGS. 1-6 in its preferred embodiment, has an opening formed in the side wall 28 , preferably a multiplicity of openings such as perforations or an array of slots, but, most preferably, a multiplicity of openings formed by spacing wires 34 , either by constructing a cage or basket 32 , as shown.
  • Basket 32 is illustrated as made from circular wires 34 secured at the desired intervals with cross supports 36 , also made of wire, or, alternatively, by forming a single helical wire secured with cross supports to maintain the desired spacing of each turn of the helical wire. Spacing between adjacent wires is in part dictated by safety requirements imposed by authorities, by the requisite strength required for fan 10 , by the function of fan 10 to serve as an airflow conduit but otherwise fan 10 is preferably open on side 26 to the greatest extent possible.
  • Safety requirements relate to the size of the openings between wires 34 that, when properly set, the likelihood that someone will inadvertently stick fingers into the interior of basket 32 in the vicinity of fan blade assembly 40 is minimized. Consequently, the spacing will take into account the age of those likely to come into contact with fan 10 and the proximity of fan blade assembly 24 to basket 32 . Thus, the spacing will be wider if wires 34 are farther from fan blade assembly 24 and narrower closer to fan blade assembly 24 , and can include both spacings in the same basket 32 , as best seen in FIG. 2 .
  • Basket 32 must also be rigid enough to support fan blade assembly 24 , a motor 22 and a rear flare 16 .
  • Rear flare 16 is the solid portion of housing 12 .
  • the term “flare” simply means that the cross sectional area taken at right angles with respect to the direction of air flow increases toward the end of housing 12 , as in the flare of a trumpet.
  • front flare 14 is added to fan 10 to give the present fan 10 a symmetric, finished look.
  • Front flare 14 includes an optional front finger guard 18 , best seen in FIG. 3 .
  • Basket 32 is made to be basket-shaped so that it's rear portion 50 contiguous with side wall 28 and best seen in FIG. 5 , acts as a finger guard for the rear of fan 10 .
  • Rear flare 16 helps to control the flow of air into fan 10 is because it minimizes turbulence and increases laminar flow. Rear flare 16 is significant from an airflow standpoint; front flare 14 is much less so and is essentially an optional feature of the invention, provided essentially for appearances.
  • rear portion 50 provides a surface on which motor 22 can be mounted.
  • Rear portion 50 has a central opening through which motor 22 is partially inserted.
  • Brackets 54 that run along the side of basket 32 across rear portion 50 and thence into the interior of basket 32 where they form loops 58 and then return, are used to support motor 22 .
  • Threaded posts 60 on the front of motor 22 extend through loops 58 .
  • Nuts 62 are then threaded to posts 60 to secure motor 22 to brackets 54 .
  • Motor 42 has a central shaft 68 to which fan blade assembly 40 is attached.
  • Blade assembly may have three or more paddle blades 70 .
  • the present fan 10 is much quieter than prior art venturi fans. While not wishing to be bound by theory, it is believed that this result has been achieved by a number of different factors working in combination.
  • fan 10 controls and directs airflow in much the same way as a prior art venturi fan, sound now can disperse over a greater angle because side wall 28 of fan 10 is open and is not channeled with the airflow.
  • the tips of its blade assembly normally pass closer to the housing than in the present fan 10 and the turbulence that arises sets up vibrations in the solid housing. Those vibrations are reflected throughout the housing and may resonate. Turbulence is reduced in the present fan 10 .
  • the tips of fan blade assembly 24 are farther from wires 34 at least for safety reasons alone, and are no longer as starved for air, as air is admitted freely through side wall 28 between wires 34 . Furthermore, vibrations created by the movement of fan blade assembly 24 in the vicinity of wires 34 are weaker and less easily reflected by wires 34 .
  • the prior art side wall mounted bracket has been removed in favor of mounting motor 22 directly onto rear portion 50 , thus eliminating a structure on the interior of the fan that causes additional turbulence and noise. It is believed that these changes result in less noise and “whiter” noise, that is, noise spread more evenly over the audible frequency spectrum.
  • front and rear flares 14 , 16 may be the same and may be symmetrical with respect to each other, but may alternatively be different if desired for packaging efficiency.
  • rear flare 16 may have a smaller diameter where it fits onto basket 32 than front flare 14 in order that basket 32 may have a slightly frustoconical shape, as shown best in FIG. 2 , so that it nests better with other baskets 32 in shipping or storing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/237,299 2004-11-22 2005-09-28 Venturi fan Abandoned US20060110272A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US11/237,299 US20060110272A1 (en) 2004-11-22 2005-09-28 Venturi fan
EP05852085A EP1815141A2 (en) 2004-11-22 2005-11-22 Venturi fan
MX2007006008A MX2007006008A (es) 2004-11-22 2005-11-22 Ventilador tipo venturi.
CA002587859A CA2587859A1 (en) 2004-11-22 2005-11-22 Venturi fan
AU2005309642A AU2005309642A1 (en) 2004-11-22 2005-11-22 Venturi fan
PCT/US2005/042508 WO2006058100A2 (en) 2004-11-22 2005-11-22 Venturi fan

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63011304P 2004-11-22 2004-11-22
US11/237,299 US20060110272A1 (en) 2004-11-22 2005-09-28 Venturi fan

Publications (1)

Publication Number Publication Date
US20060110272A1 true US20060110272A1 (en) 2006-05-25

Family

ID=36461101

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/237,299 Abandoned US20060110272A1 (en) 2004-11-22 2005-09-28 Venturi fan

Country Status (6)

Country Link
US (1) US20060110272A1 (es)
EP (1) EP1815141A2 (es)
AU (1) AU2005309642A1 (es)
CA (1) CA2587859A1 (es)
MX (1) MX2007006008A (es)
WO (1) WO2006058100A2 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150231543A1 (en) * 2014-02-18 2015-08-20 Blueair Ab Air purifier device with fan duct
US20150323177A1 (en) * 2014-05-06 2015-11-12 Steffes Corporation Air-assist flare
US9694369B2 (en) 2014-02-18 2017-07-04 Blueair Ab Air purifier device with ionizing means
US9919252B2 (en) 2014-02-18 2018-03-20 Blueair Ab Air purifier device with coupling mechanism
USD879280S1 (en) 2018-06-29 2020-03-24 Patterson Fan Company Venturi fan

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US442615A (en) * 1890-12-16 Marine propulsion
US521862A (en) * 1894-06-26 Ventilating-fan
US2191341A (en) * 1937-02-26 1940-02-20 Jeffrey Mfg Co Ventilator
US2252256A (en) * 1939-01-11 1941-08-12 Harris Eliot Huntington Sound attenuator for air impellers
US2420209A (en) * 1944-07-10 1947-05-06 Clifford M Strom Electric fan
US2441737A (en) * 1944-01-03 1948-05-18 William W Weich Plastic ventilator fan
US2618435A (en) * 1950-02-25 1952-11-18 Westinghouse Electric Corp Air translating apparatus
US3903960A (en) * 1973-12-26 1975-09-09 Int Harvester Co Fan shroud entrance structure
US4818183A (en) * 1987-12-03 1989-04-04 Schaefer Ronald E Low impedance fan safety guard
US6027307A (en) * 1997-06-05 2000-02-22 Halla Climate Control Corporation Fan and shroud assembly adopting the fan
USD444222S1 (en) * 2000-08-14 2001-06-26 Lasko Holdings, Inc. Pivot fan
US6347922B1 (en) * 2000-03-09 2002-02-19 Pierce Wang Portable cooling fan with indented blades
US6710486B1 (en) * 2003-01-13 2004-03-23 Sunonwealth Electric Machine Industry Co., Ltd. Housing structure for a heat-dissipation fan
USD557398S1 (en) * 2005-09-28 2007-12-11 Patterson Fan Company Venturi fan

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US442615A (en) * 1890-12-16 Marine propulsion
US521862A (en) * 1894-06-26 Ventilating-fan
US2191341A (en) * 1937-02-26 1940-02-20 Jeffrey Mfg Co Ventilator
US2252256A (en) * 1939-01-11 1941-08-12 Harris Eliot Huntington Sound attenuator for air impellers
US2441737A (en) * 1944-01-03 1948-05-18 William W Weich Plastic ventilator fan
US2420209A (en) * 1944-07-10 1947-05-06 Clifford M Strom Electric fan
US2618435A (en) * 1950-02-25 1952-11-18 Westinghouse Electric Corp Air translating apparatus
US3903960A (en) * 1973-12-26 1975-09-09 Int Harvester Co Fan shroud entrance structure
US4818183A (en) * 1987-12-03 1989-04-04 Schaefer Ronald E Low impedance fan safety guard
US6027307A (en) * 1997-06-05 2000-02-22 Halla Climate Control Corporation Fan and shroud assembly adopting the fan
US6347922B1 (en) * 2000-03-09 2002-02-19 Pierce Wang Portable cooling fan with indented blades
USD444222S1 (en) * 2000-08-14 2001-06-26 Lasko Holdings, Inc. Pivot fan
US6710486B1 (en) * 2003-01-13 2004-03-23 Sunonwealth Electric Machine Industry Co., Ltd. Housing structure for a heat-dissipation fan
USD557398S1 (en) * 2005-09-28 2007-12-11 Patterson Fan Company Venturi fan

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150231543A1 (en) * 2014-02-18 2015-08-20 Blueair Ab Air purifier device with fan duct
US9636617B2 (en) * 2014-02-18 2017-05-02 Blueair Ab Air purifier device with fan duct
US9694369B2 (en) 2014-02-18 2017-07-04 Blueair Ab Air purifier device with ionizing means
US9919252B2 (en) 2014-02-18 2018-03-20 Blueair Ab Air purifier device with coupling mechanism
US20150323177A1 (en) * 2014-05-06 2015-11-12 Steffes Corporation Air-assist flare
USD833900S1 (en) 2014-05-06 2018-11-20 Steffes Corporation Air-assist flare
USD879280S1 (en) 2018-06-29 2020-03-24 Patterson Fan Company Venturi fan

Also Published As

Publication number Publication date
CA2587859A1 (en) 2006-06-01
WO2006058100A2 (en) 2006-06-01
EP1815141A2 (en) 2007-08-08
MX2007006008A (es) 2007-07-20
WO2006058100A3 (en) 2007-02-01
AU2005309642A1 (en) 2006-06-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: PATTERSON FAN COMPANY, SOUTH CAROLINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MOORE, MARK;PATTERSON, VANCE M.;SALISBURY, THOMAS;REEL/FRAME:016966/0970

Effective date: 20041110

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION