US2613587A - Diffuser - Google Patents

Diffuser Download PDF

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Publication number
US2613587A
US2613587A US24537A US2453748A US2613587A US 2613587 A US2613587 A US 2613587A US 24537 A US24537 A US 24537A US 2453748 A US2453748 A US 2453748A US 2613587 A US2613587 A US 2613587A
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US
United States
Prior art keywords
air
diffuser
room
nozzle
hot air
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
US24537A
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English (en)
Inventor
Calvin D Maccracken
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.)
JET HEET Inc
Original Assignee
JET HEET Inc
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
Priority to BE509287D priority Critical patent/BE509287A/xx
Application filed by JET HEET Inc filed Critical JET HEET Inc
Priority to US24537A priority patent/US2613587A/en
Application granted granted Critical
Publication of US2613587A publication Critical patent/US2613587A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/26—Arrangements for air-circulation by means of induction, e.g. by fluid coupling or thermal effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/14—Details or features not otherwise provided for mounted on the ceiling

Definitions

  • This invention relates to a diifuser through which warm air is Asupplied to a room to be heated.
  • the diffuser serves to mix with very hot air, which is supplied at high velocity by a suitable heating apparatus, air drawn from the room, so that the resulting air mixture is at a moderately warm temperature and suitable for heating the room;
  • a suitable heating apparatus air drawn from the room, so that the resulting air mixture is at a moderately warm temperature and suitable for heating the room;
  • a diffuser such a device might be called an air injector or aspirator.
  • the diffuser hereinafter described is particularly intended to be used with a pipe through which the heating apparatus supplies hot air at a temperature which may be high, for example 310 F. which is about 240 F. above a normally ⁇ desired room temperature of 70 F. Since experience has shown that the temperature of the mixture of hot and room air which is supplied to the room by the diffuser should be in the neighborhood of 130 F., the ratio of room air to hot air in the mixture supplied to the room by the diffuser must be about 3 to 1, when the hot air supplied by the heating apparatus has the temperature above mentioned. It is difficult to achieve this ratio in a simple and practical device which may be installed in the wall of a room to be heated.
  • a diffuser embodying the present invention is due particularly to a unique nozzle which is hereinafter described. Having discovered that the amount of aspiration (that is, the ratio of cooler air to the hot air in the mixture supplied by the diffuser) depends largely upon the perimeter-area ratio of the mouth of the nozzle through which the hot air is emitted, the nozzle in the diffuser about to be described is uniquely designed so that this ratio is high, for example 20 inches to 1 square inch.
  • the nozzle has a long and rela-- tively narrow orifice which is 4sinuous or zig-zag in form out of which a long and relatively thin jet of hot air passes.
  • the nozzle is so designed and arranged within the casing of the diffuser that the air drawn from the room, in flowing toward the mouth of the nozzle on both sides thereof, not only meets but little resistance but flows in contact with the wall of the nozzle thereby warming the aspirated room air.
  • Another important feature contributing to the satisfactory operation of the diffuser hereinafter described is a construction which substantially prevents re-circulation within the diffuser of the mixture of hot and cooler air, with the result that sai'd air mixture readily passes into the room K to be heated.
  • Fig. 1 is a front Lelevation of a diffuser embodying the invention
  • Fig. 3 is a plan view of said nozzle element; and Fig. 6 is a perspective view of' said nozzle element.
  • the diffuser about to be described is adapted and intended to be installed in the space between adjacent studs in a wall of a room to be heated, as will be apparent from Figs. l and 2 in which the outside portion of a room wall is indicated at I 0 and the back portion is indicated at'lll.
  • the face-plate I2 of the dilfuser is provided with intake and outlet openings, which may be of any form and shape, such as intake louver openings I4 and outlet louver openings I6.
  • the casing i8 of the diffuser is located within the wall, and the face-plate Iii-is secured to the casing Iii by screws I9, which also serve to secure the casingto the wall Hl, as best shown in Fig. 2.
  • Fig. 1 the face-plate Iii-is secured to the casing Iii by screws I9, which also serve to secure the casingto the wall Hl, as best shown in Fig. 2.
  • the nozzle (shown in Figs. 3 to 6 and hereinafter described) is 'shown at ll.
  • This nozzle I1 is secured to the back of the casingl i8 by brackets 2U and 2l vwhich at one end may be soldered to the edges of the nozzle, and at the other end may be secured to the back of the diffuser casing i8 by means of screws 22.
  • the base of the nozzle is provided with a tube v23 which is adapted to enter an insulated pipe-V24 supplying the hot air, as shown in Fig. 2.
  • the face-plate t2 is provided with an inwardly-extending portion 34 serving as an air-baffling means.
  • Curved baffles 36 and 38 mounted in the casing I8, serve to divide the mixture of hot and room air and direct the divided portions of said mixture toward the outlet louvers IB.
  • the nozzle I'I To permit control of the hot air entering the nozzle I'I through the tube 23, the latter is provided with a damper 30 which is secured to a shaft 32 which is mounted for rotation in the tube 23. As shown in Fig. 2, the shaft 32 extends out through a hole in the face-plate I2 and at its outer end is provided with a button 33 which permits manual rotation of the damper 30 so as to regulate or even cut off the flow of hot air to the nozzle I'I.
  • the damper 30 is retained in any position to which it may be adjusted by the frictional engagement of the ends of springs 35 and 36 surrounding the shaft 32 with washers 31 and 38 carried by the shaft 32 and lying against the outside of the tube 23, and with washers 39 and 45 also carried by the shaft 32 and cooperating with cotter pins 4I and 42 which extend through holes in the shaft 32, as best shown in Fig. 4.
  • Fig. 4 also shows manually adjustable means cooperating with the damper for limiting the extent of the movement of the latter. As shown, this manually adjustable means for limiting the movement of the damper comprises a rod 43 which is rotatably mounted in opposite walls of the nozzle I'I, and is provided with a projecting finger 45 adapted to cooperate with the damper 30 and limit its movement.
  • the rod 43 at one end is provided with a slot 46 adapted to receive a screw-driver, and is threaded so as to receive a nut 4T which may be set up against the outside of the nozzle wall, thereby squeezing the nozzle wall against the shoulder of rod 43 and holding the rod 43 and its finger 45 in any position to which it may be adjusted.
  • a nut 4T which may be set up against the outside of the nozzle wall, thereby squeezing the nozzle wall against the shoulder of rod 43 and holding the rod 43 and its finger 45 in any position to which it may be adjusted.
  • the tube 23 which (as hereinbefore described) is adapted to be attached to the pipe 24 through which the hot air is supplied, is provided at its top with a rectangular plate 50 having a circular opening registering with the opening in' the pipe 23.
  • a rectangular plate 50 having a circular opening registering with the opening in' the pipe 23.
  • To the plate 50 are secured upwardly-extending fan-shaped sheet-metal walls 52 and 54 which converge toward one another as they extend upwardly and cooperate at their upper edges to form a long and narrow orifice which is sinuous vor zig-zag in form, as will be evident from Figs.
  • the walls 52 and 54 are readily formed to the shape illustrated in Figs. 3 to 6 in which the bends in the wall 52 are shown at a, b, c, d, e and j; and the bends in the wall 54 are shown at g, h, i, 7', lc and l.
  • the lower edges of the walls 52 and 54 are soldered, welded or otherwise secured to the plate 50, where they are spaced apart from one another a considerable distance; and along their side edges 56 and 58 said walls are brought together and soldered, welded or otherwise secured to one another.
  • the said walls are spot-welded to one another at their top edges as indicated at 60, 61,'62, 63 and 64. It will be of course understood that instead of forming the bends in the walls 52 and 54 with sharp angles, as illustrated in Figs. 5 and 6, the bends may be rounded.
  • Fig. 2 the various arrows show how the room air enters the diffuser through the intake louvers I4, passes upwardly both in front of and behind the nozzle I1, and is entrained in and mixed with the hot air escaping in a long and relatively thin jet from the sinuous or Zig-zag aperture in the top of the nozzle; and how the mixture of hot and cooler room air in passing upwardly is guided by the back and side walls of the casing I8 and by the baffles 36 and 38 toward the louvers I6 through which the air mixture passes into the room to be heated. It will be obvious that re-circulation of the air mixture is substantially prevented by the baille 34, and that the paths traversed by the room air and by the mixture of hot and room air oier little obstruction to free iiow of the air.
  • a diffuser for supplying to a room hot air mixed with a greater amount of cooler air drawn from the room comprising a casing having an air-intake opening for said cooler air, a nozzle adapted to be connected to a source supplying hot air at high velocity and having a long and relatively narrow sinuous or zig-zag orifice and located in said casing in cooperative relation to said air-intake opening, said casing being provided with an outlet opening through which the mixture of hot air and cooler air passes into said room.
  • a diffuser for supplying to a room hot air mixed with a greater amount of cooler air drawn from the room comprising a casing having a face plate provided with an air-intake opening for said cooler air, a nozzle adapted to be connected to a source supplying hot air at high velocity and having a long and. relatively narrow sinuous or zig-zag tone and located in said casing in cooperative relation to said airintake opening, air baiing means located between said face plate and said nozzle for directing the air entering said casing through said intake opening toward said nozzle and substantially preventing re-circulation of the air mixture within the casing, said casing being provided with an outlet opening through which the mixture of hot air and cooler air passes into said room.
  • a diffuser for supplying to a room hot air mixed with Ya greater amount of cooler air drawn from the room, comprising a casing having a face plate provided with lair-intake and airoutlet openings, a nozzle adapted to be connected to a source supplying hot air at high velocity and having a long and relatively narrow sinuous or zig-zag orifice and located in said casing in cooperative relation to said air-intake opening, and air bailling means projecting from the inside of said face plate between said openings therein vfor directing the air entering said casing toward said nozzle and substantially preventing re-circulation of the air mixture within .the casing.
  • a diffuser for mixing hot air with cool air drawn from a room and redirecting the mixture back into the room, comprising a casing having spaced apart air-intake and outlet openings, said -casing having an air passage between said openings, and a nozzle adapted to be connected to a source of hot air and extending into said. passage and having a long and relatively narrow outlet tone, said orifice following a sinuous or zig-zag path extending from one side of said casing to the other.
  • an air-injector nozzle adapted to be connected to a source of hot air and having a longand relatively narrow sinuous or zig-zag tone for supplying to the diffuser a long and relatively thin jet of hot air.
  • ian air-injector nozzle adapted to be connected to a source of hot air and having fan-shaped Walls arranged in converging relation to one another with their top edges parallel and spaced apart thereby forming between them a long and relatively narrow sinuous or zig-zag orifice for supplying to the diffuser a long and relatively thin jet of hot air.
  • an air-injector nozzle having a hollow base portion adapted to be connected to a source of hot air, and fan-shaped Walls connected to said base portion and arranged in converging relation to one another from said base portion with their top edges parallel to one another and spaced Kapart thereby forming between them a long and relatively narrow sinuous or zig-zag orifice for supplying to the diffuser a long and relatively thin jet of hot air.
  • an air-injector nozzle for supplying to a room hot air mixed with cooler air drawn from the room, an air-injector nozzle having a hollow base portion adapted to be connected to a source of hot air, and fan-shaped Walls spaced 4apart at their lower edges and there secured to said base portion and secured to one another at their side edges, said fan-shaped walls being arranged in converging relation to one another with their topedges parallel to one another and spaced apart thereby forming between them a long and relatively narrow sinuous or zig-zag tone tone forsupplying to the diffuser a long and relatively thin jet of hot air.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Air-Flow Control Members (AREA)
US24537A 1948-05-01 1948-05-01 Diffuser Expired - Lifetime US2613587A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE509287D BE509287A (US20100056889A1-20100304-C00004.png) 1948-05-01
US24537A US2613587A (en) 1948-05-01 1948-05-01 Diffuser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24537A US2613587A (en) 1948-05-01 1948-05-01 Diffuser

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US2613587A true US2613587A (en) 1952-10-14

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US (1) US2613587A (US20100056889A1-20100304-C00004.png)
BE (1) BE509287A (US20100056889A1-20100304-C00004.png)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663244A (en) * 1951-06-09 1953-12-22 John R Macdowell Register outlet for warm air house-heating systems
US2674177A (en) * 1951-08-04 1954-04-06 C A Olson Mfg Company Recirculating entrainment device for forced air heating systems
US2724321A (en) * 1952-09-13 1955-11-22 Kagan William Radiant wall registers
US2734445A (en) * 1956-02-14 whitney
US2737875A (en) * 1951-07-23 1956-03-13 Anemostat Corp America Air outlet device for ventilating apparatus
US2765726A (en) * 1950-12-30 1956-10-09 Donald H Powers Means for re-circulating heating air
US2770445A (en) * 1953-06-22 1956-11-13 Jet Heet Inc Air conditioning apparatus
US2821896A (en) * 1952-06-27 1958-02-04 Coleman Co Air flow devices
US2850959A (en) * 1954-06-28 1958-09-09 Coleman Co Perimeter air blender
US2868103A (en) * 1957-05-24 1959-01-13 Zeno F Molitor Hot and cold air baseboard register
US2898837A (en) * 1954-10-12 1959-08-11 Thomas L Scarselli Ventilated bed enclosure
US3106147A (en) * 1961-06-05 1963-10-08 Cones Ben Jet air circulator
US3186328A (en) * 1963-04-17 1965-06-01 Cones Ben Room air circulating system
US3687054A (en) * 1970-11-24 1972-08-29 Lockheed Aircraft Corp Air outlet apparatus
WO1984000204A1 (en) * 1982-06-23 1984-01-19 Knut Bergdahl A device for supplying air to a room
EP0888965A2 (de) * 1997-07-04 1999-01-07 DaimlerChrysler Aerospace Airbus Gesellschaft mit beschränkter Haftung Injektorluftauslass zur Temperatur- und Rauchgasüberwachung
US20090061754A1 (en) * 2007-08-31 2009-03-05 The Boeing Company Aircraft Cabin Airflow Nozzles and Associated Systems and Methods
US20220176287A1 (en) * 2020-12-09 2022-06-09 Shenzhen Antop Technology Co., Ltd Wall-mounted air purifier
EP4292934A1 (en) * 2022-06-17 2023-12-20 The Boeing Company Air distribution panel for distributing air and sensing environmental conditions

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247657C2 (de) * 1982-12-23 1986-11-27 Fa. Rud. Otto Meyer, 2000 Hamburg Luftauslaß

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB379430A (US20100056889A1-20100304-C00004.png) *
US1090934A (en) * 1912-03-19 1914-03-24 Bradford Dyers Ass Apparatus for drying fabrics.
US1140873A (en) * 1915-05-25 Winthrop L Carter Machine and method for waxing paper.
US1913980A (en) * 1930-06-21 1933-06-13 Ernest F Fisher Heating apparatus
US2000597A (en) * 1934-01-17 1935-05-07 B F Sturtevant Company Inc Air distribution unit
US2119127A (en) * 1938-05-31 Ventilating and conditioning
US2122168A (en) * 1935-10-12 1938-06-28 American Radiator Co Air heating assembly
US2131512A (en) * 1937-06-12 1938-09-27 Pittsburgh Plate Glass Co Apparatus for drying plates
US2162923A (en) * 1938-03-05 1939-06-20 Herbert H Short Refrigerator air circulating and purifying means
GB530178A (en) * 1939-06-20 1940-12-06 Carrier Engineering Co Ltd Improvements in or relating to ventilating systems
US2314569A (en) * 1940-06-15 1943-03-23 Thomas A Baker Fluid system and regulating device therefor
US2345537A (en) * 1942-05-16 1944-03-28 B F Sturtevant Co Heat exchange unit

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB379430A (US20100056889A1-20100304-C00004.png) *
US1140873A (en) * 1915-05-25 Winthrop L Carter Machine and method for waxing paper.
US2119127A (en) * 1938-05-31 Ventilating and conditioning
US1090934A (en) * 1912-03-19 1914-03-24 Bradford Dyers Ass Apparatus for drying fabrics.
US1913980A (en) * 1930-06-21 1933-06-13 Ernest F Fisher Heating apparatus
US2000597A (en) * 1934-01-17 1935-05-07 B F Sturtevant Company Inc Air distribution unit
US2122168A (en) * 1935-10-12 1938-06-28 American Radiator Co Air heating assembly
US2131512A (en) * 1937-06-12 1938-09-27 Pittsburgh Plate Glass Co Apparatus for drying plates
US2162923A (en) * 1938-03-05 1939-06-20 Herbert H Short Refrigerator air circulating and purifying means
GB530178A (en) * 1939-06-20 1940-12-06 Carrier Engineering Co Ltd Improvements in or relating to ventilating systems
US2314569A (en) * 1940-06-15 1943-03-23 Thomas A Baker Fluid system and regulating device therefor
US2345537A (en) * 1942-05-16 1944-03-28 B F Sturtevant Co Heat exchange unit

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734445A (en) * 1956-02-14 whitney
US2765726A (en) * 1950-12-30 1956-10-09 Donald H Powers Means for re-circulating heating air
US2663244A (en) * 1951-06-09 1953-12-22 John R Macdowell Register outlet for warm air house-heating systems
US2737875A (en) * 1951-07-23 1956-03-13 Anemostat Corp America Air outlet device for ventilating apparatus
US2674177A (en) * 1951-08-04 1954-04-06 C A Olson Mfg Company Recirculating entrainment device for forced air heating systems
US2821896A (en) * 1952-06-27 1958-02-04 Coleman Co Air flow devices
US2724321A (en) * 1952-09-13 1955-11-22 Kagan William Radiant wall registers
US2770445A (en) * 1953-06-22 1956-11-13 Jet Heet Inc Air conditioning apparatus
US2850959A (en) * 1954-06-28 1958-09-09 Coleman Co Perimeter air blender
US2898837A (en) * 1954-10-12 1959-08-11 Thomas L Scarselli Ventilated bed enclosure
US2868103A (en) * 1957-05-24 1959-01-13 Zeno F Molitor Hot and cold air baseboard register
US3106147A (en) * 1961-06-05 1963-10-08 Cones Ben Jet air circulator
US3186328A (en) * 1963-04-17 1965-06-01 Cones Ben Room air circulating system
US3687054A (en) * 1970-11-24 1972-08-29 Lockheed Aircraft Corp Air outlet apparatus
WO1984000204A1 (en) * 1982-06-23 1984-01-19 Knut Bergdahl A device for supplying air to a room
EP0888965A2 (de) * 1997-07-04 1999-01-07 DaimlerChrysler Aerospace Airbus Gesellschaft mit beschränkter Haftung Injektorluftauslass zur Temperatur- und Rauchgasüberwachung
EP0888965A3 (de) * 1997-07-04 2000-04-12 DaimlerChrysler Aerospace Airbus Gesellschaft mit beschränkter Haftung Injektorluftauslass zur Temperatur- und Rauchgasüberwachung
US20090061754A1 (en) * 2007-08-31 2009-03-05 The Boeing Company Aircraft Cabin Airflow Nozzles and Associated Systems and Methods
US9505498B2 (en) * 2007-08-31 2016-11-29 The Boeing Company Aircraft cabin airflow nozzles and associated systems and methods
US20220176287A1 (en) * 2020-12-09 2022-06-09 Shenzhen Antop Technology Co., Ltd Wall-mounted air purifier
EP4292934A1 (en) * 2022-06-17 2023-12-20 The Boeing Company Air distribution panel for distributing air and sensing environmental conditions

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Publication number Publication date
BE509287A (US20100056889A1-20100304-C00004.png)

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