US2894728A - Multi-zone air conditioning unit - Google Patents

Multi-zone air conditioning unit Download PDF

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Publication number
US2894728A
US2894728A US638497A US63849757A US2894728A US 2894728 A US2894728 A US 2894728A US 638497 A US638497 A US 638497A US 63849757 A US63849757 A US 63849757A US 2894728 A US2894728 A US 2894728A
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Prior art keywords
casing
fan wheel
air
fan
cross
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Expired - Lifetime
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US638497A
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James R Davis
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Trane Co
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Trane Co
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    • 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
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
    • F24F3/048—Systems in which all treatment is given in the central station, i.e. all-air systems with temperature control at constant rate of air-flow
    • F24F3/052—Multiple duct systems, e.g. systems in which hot and cold air are supplied by separate circuits from the central station to mixing chambers in the spaces to be conditioned
    • F24F3/0527—Multiple duct systems, e.g. systems in which hot and cold air are supplied by separate circuits from the central station to mixing chambers in the spaces to be conditioned in which treated air having differing temperatures is conducted through independent conduits from the central station to various spaces to be treated, i.e. so-called "multi-Zone" systems

Definitions

  • This invention relates vto air conditioning units and more particularly to air conditioning units having a heating coil, a cooling coil, dampers for varying the amount of heated and cooled air passing through each of a plurality of outlet openings and a fan for moving air through the unit.
  • Fig. 1 is a view in elevation of the outlet side of the unit of this invention
  • Fig. 2 is an end elevational view of the unit with portions of the casing broken away to show the interior construction
  • Fig. 3 is a perspective view with portions of the casing broken away to show the interior construction.
  • the unit has a damper section 10, a coil section 12, and a fan section 14.
  • the sections 10, 12, and 14 fastened together in any suitable manner as by bolts not shown.
  • a cross-how fan wheel 22 having forwardly curved blades 24 is secured to a shaft 26 which is suitably supported in bearings at the ends of the unit and rotatably driven from a motor 28 through a motor pulley 30 and a belt 32.
  • the fan wheels 22 have a plurality of spaced hub plates 33 for supporting the fan wheel 22 on the shaft 26 along its length. Air enters the fan wheel 22 through an opening 35 in the fan section 14. The air is discharged from the fan wheel 22 between the block-Otis 34 and 36. Block-offs 34 and 36 define the discharge area and prevent reverse flow of air from the discharge side to the inlet side of the fan wheel 22.
  • a divider 38 extends from end to end of the fan section 14 and from the coil section 12 to close proximity with respect to the fan wheel 22 to divide the air discharged from the fan Wheel 22 into two separate streams one of which Hows through the heating coil 40 and the other of which flows through the cooling coil 42.
  • the damper section has a wall 46 for separating the two air streams.
  • a pair of spaced channels 48 and 50 extend from end to end of the damper section 10 and nitcd States Patent F 2,894,728 Patented July 14, 1959 ICC channels 52 and 54 extend across the ends of channels 48 and 50 to form therewith a rectangular opening.
  • a plurality of zone partitions 56 divide the opening dened by channels 4 8, 50, 52 and 54 into a plurality of zone open ⁇ ings.
  • Shafts S8 are pivotally mounted in channels 48.
  • the rst two zone'I openings have their dampers arranged for connection ofv one zone duct, and the next three zone openings have their dampers arranged for connection of a second zone duct.
  • the dampers which serve each zone duct areconnected in a common and well known manner by suitable cranks and links to one of damper motors 64 as is clearly shown in Figure 1.
  • each end of the unit Secured to each end of the unit is a condensate shield 66 which has its lower end extending into a condensate drain cup 68.
  • the condensate vwhich drips from theends of the cooling coil 42 is conducted by the condensate shield 66 into the condensate drain cup 68.
  • Eachl drain cup 68 has a trap drain pipe 70 which conductsV con-
  • An air conditioning unit comprising a rectangular casing, one end of said casing having a longitudinal rectangular inlet opening extending substantially the entire length of said one end of said casing, a cross-How fan wheel in said casing, means rotatably mounting said cross-ow fan wheel on said casing, said cross-ow fan wheel having its length greater than its diameter and being positioned adjacent the inlet opening in said one end of said casing and having its major axis extending substantially the entire length of the inlet opening, a first block-oit member secured to said casing and extending inwardly from one side of Said inlet opening and surrounding a portion only of the periphery of said crossow fan Wheel along substantially its entire length, a second block-cti member secured to said casing and extending inwardly from the other side of the inlet opening and surrounding a second portion of the periphery of said cross-flow fan wheel along substantially its entire length, a partition secured to said casing and extending between the sides of said casing to form with said casing two air passage
  • An air conditioning unit comprising a rectangular casing, one end of said casing having a longitudinal rectangular inlet opening, a cross-How fan 'wheel in said casing, means rotatably mounting said cross-How fan lwheel on said casing, said cross-How fan wheel having its length greater than its diameter and being positioned adjacent the longitudinal rectangular inlet opening in said one end of said casing with the major axis of said crossflow fan wheel substantially parallel to the major axis of the longitudinal rectangular inlet opening, a first blockoff member Secured to said casing and extending inwardly from one side of said inlet opening and surrounding a portion only of the periphery of said cross-ow'fan wheel along substantially its entire length, a second block-oit member secured to said casing and extending inwardly from the other Side of the inlet opening and surrounding a.
  • a partition secured to said casing and extending between the sides of said casing to form With said casing'two air passageways, said partition extending between the sides of said casing to form with said casing two air passageways, said partition extending substantially to the periphery of said crossow fan wheel at a portion of the periphery between and spaced from said first and said second block-off members to divide the air delivered trorn said crossilow fan into tWo streams, a heating coil secured to said casing and being positioned in one of said passageways, a cooling coil secured to said casing and being positioned in the other of said passageways, and dampers adjustably mounted in said casing in both of said passageways, and means for adjustably positioning said dampers to vary the volume rates of air tlow through each of said passageways.
  • An air Conditioning unit comprising a rectangular casing, one end of said casing having a longitudinal rectangular inlet opening, a cross-flow fan wheel in said casing, means rotatably mounting said cross-flow fan wheel on said casing, said cross-flow fan Wheel being positioned adjacent the inlet opening with its axis of rotation parallel to the plane of said inlet opening, a

Description

July 14, 1959 J, R, DAvls 2,894,728
MULTI-ZONE AIR CONDITIONING UNIT @MY my July 14, 1959 J. R. DAVIS 2,894,728
MULTI-ZONE AIR CONDITIONING UNIT Filed Feb. 6, 1957 2 Sheets-Sheet 2 o I 00 l0 0 I* l 000 Il l 42 0o li l 0 Il I 36 24 35 /2 22 24|| i /4 -3+|| F' 3. 72 l S JNVENToR.
JAMES R. DAVIS Bil/Mv ATTORNEYS Muur-ZONE AIR CONDITIONING .lames Davis, La Crosse, Wis., assigner to The Trane Company, La Crosse, Wis., a corporation of Wisconsin Application February 6, 1957, Serial No. 638,497 s claims. (C1. 257-.-9)
This invention relates vto air conditioning units and more particularly to air conditioning units having a heating coil, a cooling coil, dampers for varying the amount of heated and cooled air passing through each of a plurality of outlet openings and a fan for moving air through the unit.
It is an object of this invention to provide an arrangement of the fan, coils, and passageways which will eiectively divide the air into two separate streams so that the mixing of air from 'one stream to another is substantially eliminated regardless of the position of the dampers. Mixing of the two streams of air with a resulting loss in capacity and control has been a problem with prior umts of this type. In prior units when the dampers were positioned for 100% cold air the effect of the heating coil -would reduce the cooling capacity as much as to l0 percent.
It is another object of the invention to provide a fan Iwhich is easily manufactured and assembled in the unit and which is particularly adapted to cooperate with the other elements of the unit in accomplishing the function 'of the unit.
Other objects and advantages of the invention will become apparent as the specilication proceeds to describe the invention with reference to the accompanying drawings in which:
Fig. 1 is a view in elevation of the outlet side of the unit of this invention;
Fig. 2 is an end elevational view of the unit with portions of the casing broken away to show the interior construction;
Fig. 3 is a perspective view with portions of the casing broken away to show the interior construction.
Referring now to the drawings, the unit has a damper section 10, a coil section 12, and a fan section 14. The sections 10, 12, and 14 fastened together in any suitable manner as by bolts not shown.
A cross-how fan wheel 22 having forwardly curved blades 24 is secured to a shaft 26 which is suitably supported in bearings at the ends of the unit and rotatably driven from a motor 28 through a motor pulley 30 and a belt 32. The fan wheels 22 have a plurality of spaced hub plates 33 for supporting the fan wheel 22 on the shaft 26 along its length. Air enters the fan wheel 22 through an opening 35 in the fan section 14. The air is discharged from the fan wheel 22 between the block-Otis 34 and 36. Block- offs 34 and 36 define the discharge area and prevent reverse flow of air from the discharge side to the inlet side of the fan wheel 22. A divider 38 extends from end to end of the fan section 14 and from the coil section 12 to close proximity with respect to the fan wheel 22 to divide the air discharged from the fan Wheel 22 into two separate streams one of which Hows through the heating coil 40 and the other of which flows through the cooling coil 42.
The damper section has a wall 46 for separating the two air streams. A pair of spaced channels 48 and 50 extend from end to end of the damper section 10 and nitcd States Patent F 2,894,728 Patented July 14, 1959 ICC channels 52 and 54 extend across the ends of channels 48 and 50 to form therewith a rectangular opening. A plurality of zone partitions 56 divide the opening dened by channels 4 8, 50, 52 and 54 into a plurality of zone open` ings. Shafts S8 are pivotally mounted in channels 48.
stance starting at the left in Figure 1, the rst two zone'I openings have their dampers arranged for connection ofv one zone duct, and the next three zone openings have their dampers arranged for connection of a second zone duct. The dampers which serve each zone duct areconnected in a common and well known manner by suitable cranks and links to one of damper motors 64 as is clearly shown in Figure 1.
Secured to each end of the unit is a condensate shield 66 which has its lower end extending into a condensate drain cup 68. The condensate vwhich drips from theends of the cooling coil 42 is conducted by the condensate shield 66 into the condensate drain cup 68. Eachl drain cup 68 has a trap drain pipe 70 which conductsV con- Although a unit having one fan has been shown'gtanddescribed, it should be understood that units having more than one fan are contemplated. While we have described preferred embodiments of our invention, we contemplate that many changes may be made without departing from the scope or spirit of our invention and we desire to be limited only by the claims.
I claim:
l. An air conditioning unit comprising a rectangular casing, one end of said casing having a longitudinal rectangular inlet opening extending substantially the entire length of said one end of said casing, a cross-How fan wheel in said casing, means rotatably mounting said cross-ow fan wheel on said casing, said cross-ow fan wheel having its length greater than its diameter and being positioned adjacent the inlet opening in said one end of said casing and having its major axis extending substantially the entire length of the inlet opening, a first block-oit member secured to said casing and extending inwardly from one side of Said inlet opening and surrounding a portion only of the periphery of said crossow fan Wheel along substantially its entire length, a second block-cti member secured to said casing and extending inwardly from the other side of the inlet opening and surrounding a second portion of the periphery of said cross-flow fan wheel along substantially its entire length, a partition secured to said casing and extending between the sides of said casing to form with said casing two air passageways, said partition extending substantially to the periphery of said cross-dow fan wheel at a portion of the periphery between and spaced from said first and said second block-ott members to divide the air delivered from said cross-How fan into two streams, a heating coil Secured to said casing and being positioned in one of said passageways and a cooling coil secured to said casing and being positioned in the other of said passageways.
2. An air conditioning unit comprising a rectangular casing, one end of said casing having a longitudinal rectangular inlet opening, a cross-How fan 'wheel in said casing, means rotatably mounting said cross-How fan lwheel on said casing, said cross-How fan wheel having its length greater than its diameter and being positioned adjacent the longitudinal rectangular inlet opening in said one end of said casing with the major axis of said crossflow fan wheel substantially parallel to the major axis of the longitudinal rectangular inlet opening, a first blockoff member Secured to said casing and extending inwardly from one side of said inlet opening and surrounding a portion only of the periphery of said cross-ow'fan wheel along substantially its entire length, a second block-oit member secured to said casing and extending inwardly from the other Side of the inlet opening and surrounding a. second portion of the periphery of said cross-dow fan wheel along Substantially its entire length, a partition secured to said casing and extending between the sides of said casing to form With said casing'two air passageways, said partition extending between the sides of said casing to form with said casing two air passageways, said partition extending substantially to the periphery of said crossow fan wheel at a portion of the periphery between and spaced from said first and said second block-off members to divide the air delivered trorn said crossilow fan into tWo streams, a heating coil secured to said casing and being positioned in one of said passageways, a cooling coil secured to said casing and being positioned in the other of said passageways, and dampers adjustably mounted in said casing in both of said passageways, and means for adjustably positioning said dampers to vary the volume rates of air tlow through each of said passageways.
3. An air Conditioning unit comprising a rectangular casing, one end of said casing having a longitudinal rectangular inlet opening, a cross-flow fan wheel in said casing, means rotatably mounting said cross-flow fan wheel on said casing, said cross-flow fan Wheel being positioned adjacent the inlet opening with its axis of rotation parallel to the plane of said inlet opening, a
first blocko member secured to said casing and extending inwardly from one longitudinal side of said inlet opening and surrounding a portion only of the periphery of said cross-ow fan wheel along substantially its entire length, a second block-oft member secured to said casing and extending inwardly from the other longitudinal side of said inlet opening and surrounding a second portion of the periphery of said cross-flow fan Iwheel along substantially its entire length, said rst block-oi member and said Second block-oit member each having a vane portion extending outwardly with respect to the `crossow fan wheel to guide the air discharged from said cross-W fan wheel, a partition secured to said casing and extending between the sides of said casing to farm with said casing two air passageways, said partition extending substantially to the periphery of said cross-flow fan wheel, said partition being between and spaced from the vane portions of said first and second block-erts, said partition being inclined with respect to the vane portions of said iirst and second block-ofic members to provide diverging discharge ducts, a heating :coil secured to said casing and being positioned in one of said passageways and a cooling coil secured to said casing and being positioned in lthe other of said passageways.
References Cited in the le of this patent UNITED STATES PATENTS 2,001,834 Carson May 21, 1935 2,093,306 Carson Sept. 14, 1937 2,238,688 Guler Apr. 15, 1941 2,292,335 Durbin Aug. 4, 1942 FOREIGN PATENTS 394,589 France Ian, 27, 1909
US638497A 1957-02-06 1957-02-06 Multi-zone air conditioning unit Expired - Lifetime US2894728A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141454A (en) * 1960-02-11 1964-07-21 Laing Nikolaus Heat storage apparatus
US3177794A (en) * 1960-04-14 1965-04-13 Laing Nikolaus Automobile-windshield defroster
US3387647A (en) * 1966-08-15 1968-06-11 Heskestad Gunnar Air treating means including an air flow directing system
US3394754A (en) * 1966-08-08 1968-07-30 Mammtoth Ind Inc Method and apparatus for controlling air flow
US3592260A (en) * 1969-12-05 1971-07-13 Espey Mfg & Electronics Corp Heat exchanger with inner guide strip
US3708011A (en) * 1969-12-24 1973-01-02 A Serratto Local air conditioning apparatus
US3940215A (en) * 1972-12-28 1976-02-24 Matsushita Electric Industrial Co., Ltd. Blower
US4002109A (en) * 1972-12-28 1977-01-11 Matsushita Electric Industrial Co., Ltd. Blower
US4821796A (en) * 1985-01-17 1989-04-18 Aurora Konrad G. Schulz Gmbh & Co. Device for heating compartments
US4854726A (en) * 1986-05-29 1989-08-08 Hughes Aircraft Company Thermal stress screening system
US20050189430A1 (en) * 2004-02-26 2005-09-01 Mestek, Inc. Multi-zone integral face bypass coil system
US20050286222A1 (en) * 2004-06-24 2005-12-29 Lucero Christopher D Reconfigurable airflow director for modular blade chassis

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR394589A (en) *
US2001834A (en) * 1930-05-31 1935-05-21 Clifford C Carson Vertical unit heater
US2093306A (en) * 1928-09-27 1937-09-14 Clifford C Carson Heater
US2238688A (en) * 1938-06-16 1941-04-15 Honeywell Regulator Co Air conditioning system
US2292335A (en) * 1941-08-27 1942-08-04 Stephen A Durbin Air conditioning apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR394589A (en) *
US2093306A (en) * 1928-09-27 1937-09-14 Clifford C Carson Heater
US2001834A (en) * 1930-05-31 1935-05-21 Clifford C Carson Vertical unit heater
US2238688A (en) * 1938-06-16 1941-04-15 Honeywell Regulator Co Air conditioning system
US2292335A (en) * 1941-08-27 1942-08-04 Stephen A Durbin Air conditioning apparatus

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141454A (en) * 1960-02-11 1964-07-21 Laing Nikolaus Heat storage apparatus
US3177794A (en) * 1960-04-14 1965-04-13 Laing Nikolaus Automobile-windshield defroster
US3394754A (en) * 1966-08-08 1968-07-30 Mammtoth Ind Inc Method and apparatus for controlling air flow
US3387647A (en) * 1966-08-15 1968-06-11 Heskestad Gunnar Air treating means including an air flow directing system
US3592260A (en) * 1969-12-05 1971-07-13 Espey Mfg & Electronics Corp Heat exchanger with inner guide strip
US3708011A (en) * 1969-12-24 1973-01-02 A Serratto Local air conditioning apparatus
US3940215A (en) * 1972-12-28 1976-02-24 Matsushita Electric Industrial Co., Ltd. Blower
US4002109A (en) * 1972-12-28 1977-01-11 Matsushita Electric Industrial Co., Ltd. Blower
US4821796A (en) * 1985-01-17 1989-04-18 Aurora Konrad G. Schulz Gmbh & Co. Device for heating compartments
US4854726A (en) * 1986-05-29 1989-08-08 Hughes Aircraft Company Thermal stress screening system
US20050189430A1 (en) * 2004-02-26 2005-09-01 Mestek, Inc. Multi-zone integral face bypass coil system
US20050286222A1 (en) * 2004-06-24 2005-12-29 Lucero Christopher D Reconfigurable airflow director for modular blade chassis
US7259961B2 (en) * 2004-06-24 2007-08-21 Intel Corporation Reconfigurable airflow director for modular blade chassis

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