US2962952A - Air conditioning unit - Google Patents

Air conditioning unit Download PDF

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Publication number
US2962952A
US2962952A US643427A US64342757A US2962952A US 2962952 A US2962952 A US 2962952A US 643427 A US643427 A US 643427A US 64342757 A US64342757 A US 64342757A US 2962952 A US2962952 A US 2962952A
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US
United States
Prior art keywords
nozzle
air
unit
heat exchange
slot
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
US643427A
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English (en)
Inventor
William L Mcgrath
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 BE565272D priority Critical patent/BE565272A/xx
Priority to BE565239D priority patent/BE565239A/xx
Application filed by Carrier Corp filed Critical Carrier Corp
Priority to US643427A priority patent/US2962952A/en
Priority to FR1198798D priority patent/FR1198798A/fr
Priority to GB5615/58A priority patent/GB820696A/en
Application granted granted Critical
Publication of US2962952A publication Critical patent/US2962952A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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

Definitions

  • This invention relates to air conditioning units and more particularly to improved air conditioning units containing slot type primary air discharge means and means to act therewith to induce a stream of secondary air from the area being conditioned through a heat exchange member in the unit and to efiiciently and quietly 'mix with the stream of primary air, the mixture of primary air and secondary air being discharged within the area being treated.
  • a stream of conditioned primary air (cold or warm) from the central stationv is discharged into the unit at a velocity such as to induce a stream of secondary air from the room into the unit through the heat exchanger to mix therewith.
  • the mixture of streams is then discharged into the room to cool or heat the same.
  • the system disclosed in the Carrier patent has been acknowledged as the most commercially desirable system available. Owners of buildings such as hotels, office build I ings, etc., have also recognized the superior results obtainable from the Carrier system and insist on the use of such system in their buildings when superior results are desired.
  • the unit should be fabatent' comprises a casing having a plenum member therein, said plenum member being connected to a source of primary air.
  • Air discharge means are connected to the plenum; a heat exchange member adapted to be connected to a source of heat exchange medium is located within the unit, the discharge means of the primary air being of a slot type to induce a stream of secondary air from the area being conditioned through the heat exchange member into heat exchange relation with medium passing therethrough to mix with the primary air being discharged from the slot nozzle and conduit means for passing the air through the primary air stream so that an induction ettectwill take place on both sides of the slot nozzle.
  • Figure l is a perspective view of an air conditioning unit of the invention installed in a room being conditioned;
  • Figure 2 is a sectional view taken from the side of the unit
  • Figure 3 is a sectional view taken from the front of the unit
  • Figure 4 is a fragmentary view of the slot type nozzle utilizing the present invention.
  • Figure 5 is a plan view of a modification of the inven tion shown in Figure 4.
  • Figure 1 an air conditioning unit 1 placed beneath the window of a room being treated.
  • the chief object of the present invention is to provide an improved low cost induction unit for air conditioning systems.
  • An object of the invention is to provide an inexpensive high capacity unit capable of operating at low noise levels.
  • a still further object is to provide a low'noise level induction unit, utilizing high pressure primary air discharged through slot type nozzles located within the unit.
  • This invention relates to an air conditioning unit for usein the air conditioning ofmulti-room buildings which of secondary air is induced into the unit and a mixture of primary and secondary air is discharged from said unit.
  • a heat exchange member 10 is located adjacent the opening 3 a heat exchange member 10 more fully described hereinafter.
  • a plenum 5 is located at the bottom portion of the casing 2 and it consists of an elongated chamber extending the length of the casing, being suitably insulated by material 7 and having an air inlet 6 through which primary air is passed into the plenum.
  • This primary air originates at a central station (not shown); is passed into the plenum from whence it is discharged through the nozzle 8 into' the unit.
  • the nozzle 8 consists of an elongated slot through which air is passed to the chamber above the plenum. As the air passes through the nozzle, secondary air is drawn in from the room through the opening 3 then through the heat exchange member 10. The primary and secondary air streams are then mixed.
  • FIG. 4 illustrates a type of nozzle contemplated for the present unitfor the purpose of controlling the previously mentioned eddies with a resulting decrease in the noise level of the unit.
  • an opening 21 which constitutes the nozzle in nozzle sheet 20; this opening is created by upwardly bent lips 22 and 23 which tend to converge.
  • the edge of the lips may be provided with either a sawtooth edgeor an undulating edge; the tips of the edge may be bent inwardly.
  • FIG. 5 shows a modificationof the nozzle construction illustrated in Figure 4.
  • This figure illustrates a slot type'nozzle formed in a single plane in a nozzle sheet 31.
  • This nozzle is in the shape of an irregular slot formed by the undulating edges 33 and 34. These edges have'high points 36 and 37 which are'dire'ctly opposite on the sides of the nozzle opening.
  • a similar effect is derived as is acquired from the construction shown in Figure 4.
  • the eddies are positively determined by the increase and decrease of the slot opening. By controlling the size and also the location of these eddies substantiallyquiet operation is obtained from the induction unit.
  • a heat exchange member 10 which comprises a plurality of parallel extended fin members having a general trapezoidal shape. At the end of the heat exchange member adjacent to nozzle 8 the heat exchange fin members 11 have their greatest area. However, as the distance from the nozzle increases the surface area of the fin members decreases.
  • a plurality of tubes 12 are shown which are connected into a single circuit through which heat exchange medium is passed. The fins 11 are attached to these tubes and act as an extended surface therefor.
  • the aforementioned heat exchange medium originates from a central station of the air conditioning system and may consist of either hot or cold water.
  • the presentinvention envisions the use of 'a plurality of censure; '13 passing through the primary air stream; thereby putting 'the rear section of the nozzle 8 into communication with the air passing through the opening 3 and the heat"exchang'e member 10.
  • FIG 3 there is shown a sectional view of the unit indicating the fro'rit 'ofthe unit minus the heat exchange member 10.
  • This view illustrates that the plenum extends the entire length of the unit and is substantially covered with insulatingmaterial.
  • The'prim'ary air supply duct' is connected to the centralstation of the air conditioning system from whence primary air is passed to the plenum 5 of the unit.
  • conduits 13, 14 and 15 This particular figure illustrates the nature of conduits 13, 14 and 15; It will benoted thatthese conduits'have a streamlined shape," very similar to a teardrop in crosssection.” This type of construction has been found to offer the least amount of resistance to the primary air flow. As can be seen, the air which is discharged through the nozzle passes upwardly and these conduits are in the dir'ec'tp'ath of the air stream. By suitable sizing and shaping'these conduits, a minimum amount of resistance is provided to'impede the primary air stream. Furthermore, this shape permits conduits of adequate size so as to permit a substantial amount of air to pass through the inlet 3, heat exchanger 10 and through the conduits to the rear section of the nozzle 8 where a substantial induction and mixing effect is acquired.
  • the fin members 11 of the heat exchange member have a general trapezoidal shape as previously mentioned. This provides a path of air through the heat exchange member of decreasing resistwice to said secondary air stream as it passes therethrough.
  • This particular construction is provided to compensate for "the decrease in inductive effect as the distance from the nozzle 8 increases. Adjacent to nozzle 8 the inductive effect is high; however, at the upper part of the heat exchange member 10, this effect reaches a minimum.
  • the trapezoidal fin member preferably is incorporated into this particular plate fin coil.
  • the construction illustrated by being able to make use of the front and rear sections'of the primary air stream issuing from the plenum creates a greater inductive effect than can normally be acquired by the single side of the air stream. This also permits the use of a deeper heat exchange member which is a direct result of the increased inductive effect acquired by the use of the rear portion of the primary air stream.
  • an induction unit capable of makinguse of a slot type nozzle which is an extremely economical item to manufacture compared with similar nozzle constructions requiring the drilling of hundreds of circular holes in a single nozzle sheet, or in some casesthe molding of plastic nozzle clusters having a plurality of nozzle openings oriented in such a manner as to make necessary a diflicult manufacturing process.
  • the slot type nozzle is extremely easy to manufacture and the type herein employed does not require minute clearances normally necessary; The use of serrations or undulations permits variances in manufacturing process which will not result in any subsequent noisy operation of the unit.
  • an air conditioning unit the combination of a casing, a plenum member placed in said casing, means defining an outlet in said casing, means defining an inlet in said casing, said plenum being connected to a source of primary air, a nozzle member having an elongated slot therein associated with said plenum and extending substantially parallel to said inlet whereby the discharge of primary air through said slot induces a stream of secondary air through the inlet to mix with the primary air being discharged from the plenum, and hollow, conduit means placed above the slot in the unit forming passages for secondary air from the front of the unit rearwardly over the slot so that said secondary air may be induced into the primary air stream at the rear por- 'tion of said nozzle member.
  • An air conditioning unit in which the nozzle member forms an elongated slot having edges having a substantial sawtooth configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Air Conditioning (AREA)
  • Duct Arrangements (AREA)
US643427A 1957-03-01 1957-03-01 Air conditioning unit Expired - Lifetime US2962952A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE565272D BE565272A (en)) 1957-03-01
BE565239D BE565239A (en)) 1957-03-01
US643427A US2962952A (en) 1957-03-01 1957-03-01 Air conditioning unit
FR1198798D FR1198798A (fr) 1957-03-01 1958-02-10 Appareil de conditionnement d'air
GB5615/58A GB820696A (en) 1957-03-01 1958-02-20 Improvements in or relating to air conditioning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US643427A US2962952A (en) 1957-03-01 1957-03-01 Air conditioning unit

Publications (1)

Publication Number Publication Date
US2962952A true US2962952A (en) 1960-12-06

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ID=24580772

Family Applications (1)

Application Number Title Priority Date Filing Date
US643427A Expired - Lifetime US2962952A (en) 1957-03-01 1957-03-01 Air conditioning unit

Country Status (4)

Country Link
US (1) US2962952A (en))
BE (2) BE565239A (en))
FR (1) FR1198798A (en))
GB (1) GB820696A (en))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211218A (en) * 1962-06-25 1965-10-12 Carrier Corp Nozzle construction
US3528614A (en) * 1967-05-13 1970-09-15 Ltg Lufttechnische Gmbh Fluid admixing apparatus
FR2696228A1 (fr) * 1992-09-25 1994-04-01 Halton Oy Conditionneur d'air et procédé de conditionnement d'air.
EP2933575A1 (fr) * 2014-04-17 2015-10-21 Compagnie Industrielle D'Applications Thermiques Dispositif de diffusion avec inserts lobes et ventilo-convecteur comprenant un tel dispositif
US20210131676A1 (en) * 2019-11-01 2021-05-06 Jetoptera, Inc. Fluidic turbo heater system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPN164695A0 (en) * 1995-03-10 1995-04-06 Luminis Pty Limited Improved induction nozzle and arrangement

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB705873A (en)) *
US612480A (en) * 1898-10-18 George ii
US2122168A (en) * 1935-10-12 1938-06-28 American Radiator Co Air heating assembly
US2140305A (en) * 1936-06-05 1938-12-13 Carrier Corp Air conditioning apparatus
US2287267A (en) * 1940-05-18 1942-06-23 B F Sturtevant Co Heat exchanger
US2345536A (en) * 1942-05-16 1944-03-28 B F Sturtevant Co Heat exchange unit
US2567758A (en) * 1945-12-01 1951-09-11 Carrier Corp Air-conditioning method
US2778688A (en) * 1953-04-08 1957-01-22 Hanson Equipment Company Spraying apparatus
US2783979A (en) * 1955-03-02 1957-03-05 Borg Warner Induction unit for air conditioning
US2854915A (en) * 1953-09-17 1958-10-07 Clifford H Carr Method and apparatus for air conditioning

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB705873A (en)) *
US612480A (en) * 1898-10-18 George ii
US2122168A (en) * 1935-10-12 1938-06-28 American Radiator Co Air heating assembly
US2140305A (en) * 1936-06-05 1938-12-13 Carrier Corp Air conditioning apparatus
US2287267A (en) * 1940-05-18 1942-06-23 B F Sturtevant Co Heat exchanger
US2345536A (en) * 1942-05-16 1944-03-28 B F Sturtevant Co Heat exchange unit
US2567758A (en) * 1945-12-01 1951-09-11 Carrier Corp Air-conditioning method
US2778688A (en) * 1953-04-08 1957-01-22 Hanson Equipment Company Spraying apparatus
US2854915A (en) * 1953-09-17 1958-10-07 Clifford H Carr Method and apparatus for air conditioning
US2783979A (en) * 1955-03-02 1957-03-05 Borg Warner Induction unit for air conditioning

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211218A (en) * 1962-06-25 1965-10-12 Carrier Corp Nozzle construction
US3528614A (en) * 1967-05-13 1970-09-15 Ltg Lufttechnische Gmbh Fluid admixing apparatus
FR2696228A1 (fr) * 1992-09-25 1994-04-01 Halton Oy Conditionneur d'air et procédé de conditionnement d'air.
EP2933575A1 (fr) * 2014-04-17 2015-10-21 Compagnie Industrielle D'Applications Thermiques Dispositif de diffusion avec inserts lobes et ventilo-convecteur comprenant un tel dispositif
FR3020132A1 (fr) * 2014-04-17 2015-10-23 Ciat Sa Dispositif de diffusion avec inserts lobes et ventilo-convecteur comprenant un tel dispositif
RU2675715C2 (ru) * 2014-04-17 2018-12-24 Компани Эндюстриэль Д'Аппликасьон Термик Диффузионное устройство с гофрированными вставками и конвекционный вентилятор, содержащий такое устройство
US20210131676A1 (en) * 2019-11-01 2021-05-06 Jetoptera, Inc. Fluidic turbo heater system

Also Published As

Publication number Publication date
GB820696A (en) 1959-09-23
BE565272A (en))
BE565239A (en))
FR1198798A (fr) 1959-12-09

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