US3367566A - Fan arrangement - Google Patents

Fan arrangement Download PDF

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Publication number
US3367566A
US3367566A US510831A US51083165A US3367566A US 3367566 A US3367566 A US 3367566A US 510831 A US510831 A US 510831A US 51083165 A US51083165 A US 51083165A US 3367566 A US3367566 A US 3367566A
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United States
Prior art keywords
air
fan
inlet
chamber
baille
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Expired - Lifetime
Application number
US510831A
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English (en)
Inventor
James L Schulze
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to US510831A priority Critical patent/US3367566A/en
Priority to JP7894266A priority patent/JPS4325798B1/ja
Application granted granted Critical
Publication of US3367566A publication Critical patent/US3367566A/en
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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips

Definitions

  • FIGLI FIGB United States Patent Office 3,367,566 FAN ARRANGEMENT James L. Schulze, Middletown, Ky., assigner to General Electric Company, a corporation of New York Filed Dec. 1, 1965, Ser. No. 510,831 4 Claims. (Cl. 230-120) ABSTRACT F THE DISCLOSURE
  • a fan arrangement compising an axial flow propeller fan and a generally rectangular inlet chamber including a front wall having a fan orifice surrounding the fan.
  • the chamber includes an air inlet at one end so that air flows into the fan in a direction parallel to the blades.
  • a baille extending from one side wall of the chamber to a point overlapping the ends of the blades prevents reverse ow of air through the inlet.
  • the present invention relates to propeller fans and is more particularly concerned with an improved air flow arrangement including a propeller fan as the air moving means.
  • the conventional axial ow propeller fan delivers the maximum volume of air when no appreciable static pressure condition is involved, that is, whenit is operating as a free air fan with the principal air flow to and from the fan along an unrestricted path generally parallel to the axis of rotation of the fan.
  • space limitations necessitate an air flow arrangement such that the inlet air iiows to the fan along a radial path, that is, along a path normal to, rather than parallel to the fan axis. Under such conditions, the volume of air circulated by a given'fan is less than its rated capacity as a free air fan.
  • the present invention is concerned with and has as its principal -object the provision of an improved propeller fan air flow arrangement including an air-inlet to one sfide of the fan and'm'eans for preventing the rotating air current set up by the fan from interfering with or opposing the ow of incoming air whereby there is obtained a significant increase inthe volume of air circulated by the fan.
  • an air flow arrangement comprising an axial flow propeller fan and walls dening an air inlet chamber for the fan including an air inlet to one side of the fan such that at least a major portion of the incoming air flows along a path which is at a right angle to the axis of rotation of the fan or parallel to the plane of the fan blades.
  • means are provided on the side wall of the chamber along which most of the opposing -or reverse air ilow takes place, for deecting this interfering air ow into and through the fan.
  • FIGURE 1 is a plan view, partly in section, of a room 3,367,566 Patented Feb. 6, 1968 air conditioner incorporating the air flow arrangement of the present invention
  • FIGURE 2 is a sectional View taken generally along line 2 2 of FIGURE 1;
  • FIGURE 3 is a sectional View taken line 3 3 of FIGURE 1.
  • FIGURE 1 of the drawing there is shown therein the application of the present invention to a room air conditioner which comprises a casing 1 divided by a partition 2 into an indoor compartment 3 and an outdoor compartment 4.
  • the air conditioner also includes a refrigeration system comprising a compressor 5 and a condenser 6 positioned in the outdoor compartment 4 and an evaporator 7 positioned in the indoor compartment 3.
  • a refrigeration system comprising a compressor 5 and a condenser 6 positioned in the outdoor compartment 4 and an evaporator 7 positioned in the indoor compartment 3.
  • air moving means in the form of a blower 9 within the indoor compartment and a multiple blade propeller type fan 10 in the outdoor compartment both of which are driven by means of a motor 11 positioned in the outdoor compartment 4.
  • the air flow path for the circulation of outdoor air through the outdoor compartment is formed by means including a second partition or housing 12 spaced from partition 2 and having a fan orifice 14 therein in which the fan 10 is positioned. Outdoor air is drawn into the compartment 4 through an inlet grille 15 and after flowing in heat exchange relationship with the compressor 5, motor 11 and condenser 6 is discharged through outlet grille 17.
  • the portion 19 of the partition 12 including the fan orifice 14 forms the front wall of a generally rectangular inlet chamber 20 behind or upstream from the fan 10.
  • This chamber 20 is further dened by the adjacent portion of the partition 2 which forms the back wall thereof and by portions of the casing which form the top side wall 22, the vertical end wall 23 Vand the bottom side wall 24 of the chamber 20.
  • means are provided for shearing the rotating air from the blade tips and deecting it into and through the fan orifice at a point such that there is at the most a neglible counterow of air towards inlet 25.
  • a baffle 28 extending upwardly from the wall 24 forming the side of the chamber 20 along which the objectionable counterflow takes place.
  • this baffle 28 is directly in the tangential path of that portion of the air generally along which would otherwise reverse ilow towards the inlet 25.
  • the baille 28 operates best when it is positioned immediately below the axis of rotation of the fan as represented by the shaft 26.
  • the baille 28 and fan axis 26 should preferably be in substantially the same plane, which plane is generally perpendicular to the ilow path of the air entering through the inlet 25 with the baille 28 positioned within the chamber 20 at a point offset approximately 90 in a direction opposite to the direction of rotation of the fan 10 from the line of ilow of the air stream entering the inlet 25.
  • some improvement in air ilow may be obtained by positioning the baille a few degrees, as for example about up to 10 to 15, to one side or the other of the illustrated position.
  • the baille 28 should be in contact with the wall 24 and should extend outwardly therefrom or, in other words, in the direction of the fan 10 to a point where it overlaps at least the extreme of the blade length.
  • wider baffles which provide a greater overlapping of the blade area may be used as they do not appear to significantly affect the improved results obtained by a baille overlapping about 5% of the blade length.
  • the baille 28 should also be curved or positioned at an angle between the wall 2 and the wall 19 in order to facilitate deflection of the rotating air stream into and through the fan orifice 21.
  • An angle of about 45 is preferred.
  • Another test involved a construction in which about one-third of the incoming air entered the chamber 20 through leakage paths around the housing 12 specifically above the chamber and in the side opposite inlet as indicated by numerals 31 and 32 respectively, and the remaining twothirds through inlet 25. Significant improvements were also obtained in this construction by use of the baille 28. Speciilcally, the presence of the baille increased the air ilow rate from about 450 c.f.m. to 490 cfm., or, in other words, by about 10 percent.
  • An air ilow arrangement comprising an axial ilow propeller fan having a plurality of blades
  • a generally rectangular inlet chamber including a front wall having an annular orifice therein surrounding said fan, a rear wall spaced from said front wall and opposed side walls spaced from the periphery of said fan,
  • one end of said chamber being open to provide an air inlet to said chamber whereby most of the incoming air ilows to said fan in a direction generally parallel to the plane of said blades and whereby a portion of the incoming air tends to rotate with the blades and' to be tangentially discharged therefrom and reverse ilow along one of said side walls in the direction of said air inlet,
  • means for substantially preventing such reverse ilow comprising a baille extending from said side wall to a point overlapping the outer ends of said blades and from said front wall to said back wall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
US510831A 1965-12-01 1965-12-01 Fan arrangement Expired - Lifetime US3367566A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US510831A US3367566A (en) 1965-12-01 1965-12-01 Fan arrangement
JP7894266A JPS4325798B1 (enrdf_load_stackoverflow) 1965-12-01 1966-12-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US510831A US3367566A (en) 1965-12-01 1965-12-01 Fan arrangement

Publications (1)

Publication Number Publication Date
US3367566A true US3367566A (en) 1968-02-06

Family

ID=24032379

Family Applications (1)

Application Number Title Priority Date Filing Date
US510831A Expired - Lifetime US3367566A (en) 1965-12-01 1965-12-01 Fan arrangement

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US (1) US3367566A (enrdf_load_stackoverflow)
JP (1) JPS4325798B1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091590A (ja) * 1984-06-07 1985-05-22 松下電器産業株式会社 高周波加熱装置
US4966524A (en) * 1987-06-18 1990-10-30 Matsushita Electric Industrial Co., Ltd. Blower

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693352A (en) * 1922-12-06 1928-11-27 Westinghouse Electric & Mfg Co Dredger pump
US2325154A (en) * 1937-05-27 1943-07-27 American Blower Corp Vortex eliminator in air handling apparatus
US2737897A (en) * 1951-01-05 1956-03-13 Borg Warner High altitude fuel system
DE1052624B (de) * 1956-06-28 1959-03-12 Paul Pollrich & Comp Stroemungsgleichrichter fuer Ventilatoren
FR1283759A (fr) * 1961-03-16 1962-02-02 Voith Gmbh J M Dispositif pour stabiliser la caractéristique de machines tournantes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693352A (en) * 1922-12-06 1928-11-27 Westinghouse Electric & Mfg Co Dredger pump
US2325154A (en) * 1937-05-27 1943-07-27 American Blower Corp Vortex eliminator in air handling apparatus
US2737897A (en) * 1951-01-05 1956-03-13 Borg Warner High altitude fuel system
DE1052624B (de) * 1956-06-28 1959-03-12 Paul Pollrich & Comp Stroemungsgleichrichter fuer Ventilatoren
FR1283759A (fr) * 1961-03-16 1962-02-02 Voith Gmbh J M Dispositif pour stabiliser la caractéristique de machines tournantes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6091590A (ja) * 1984-06-07 1985-05-22 松下電器産業株式会社 高周波加熱装置
US4966524A (en) * 1987-06-18 1990-10-30 Matsushita Electric Industrial Co., Ltd. Blower

Also Published As

Publication number Publication date
JPS4325798B1 (enrdf_load_stackoverflow) 1968-11-06

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