US3138326A - Air conditioning control apparatus - Google Patents

Air conditioning control apparatus Download PDF

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US3138326A
US3138326A US218923A US21892362A US3138326A US 3138326 A US3138326 A US 3138326A US 218923 A US218923 A US 218923A US 21892362 A US21892362 A US 21892362A US 3138326 A US3138326 A US 3138326A
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air
nozzle
turbine
manifold
source
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US218923A
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Alvin J Berger
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Honeywell Inc
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Honeywell Inc
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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
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/81—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the air supply to heat-exchangers or bypass channels

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  • Air conditioning control apparatus for unit ventilators and air distribution units are well recognized and the commonly assigned copending application of Richard C. Mott, Serial No. 189,023, filed April 20, 1962, discloses such a unit utilizing a turbine driven valve operator.
  • the present invention is directed to an improvement over the disclosure in the Mott application in that it provides proportioning control rather than on-ofI or floating type control, and a more simple design of nozzle and turbine assembly and means for controlling the same with improved means for switchover in the operation of the apparatus and in the sensing units.
  • an object of this invention to provide an improved air conditioning control apparatus of the selfcontained turbine drive type. Another object of this invention is to provide an improved proportioning type air conditioning control apparatus. A still further object of this invention is to provide in an improved air conditioning control apparatus, a turbine drive actuator in a control system of the self-contained type with provision for feedback to provide proportioning control operation. Another object of this invention is to provide a system of this type with simplified changeover operation for direct and reverse operation of the actuator from the same primary controller.
  • FIGURE 1 is a schematic disclosure of an air distribution unit utilizing improved control apparatus in the control of a valve to a heat exchanger
  • FIGURE 2 is a diagrammatic disclosure of the improved turbine drive applied to a valve
  • FIGURE 3 is a schematic disclosure of a portion of the turbine
  • FIGURE 4 is a schematic disclosure of the pneumatic control system
  • FIGURE 5 is a schematic disclosure of the second type of unit ventilator of the induction type, utilizing the improved turbine drive valve as a damper operator, and
  • FIGURE 6 is a schematic disclosure of a second em bodiment of the pneumatic control system.
  • FIGURE 1 shows an application of the improved air conditioning control apparatus to a unit ventilator or air distribution unit of the type which receives a supply of circulated air for air circulation purposes.
  • the air distribution is shown schematically as comprising a box 10 having an air inlet conduit or supply conduit 12 connected thereto and a discharge opening indicated generally at 14.
  • the unit is designed to be positioned in or adjacent to a space to be air conditioned such as is indicated in phantom at 20.
  • Circulated air is tempered by means of fiow of the air conditioning medium or tempering medium through a heat exchanger such as indicated at 21 from a supply conduit indicated at 23.
  • Flow of the air conditioning medium through the heat exchanger from the supply conduit is controlled by means of a valve 22 controlled or operated by the improved turbine drive apparatus indicated generally at 30.
  • improved turbine actuator is comprised of a turbine wheel 38 which is pivoted or mounted on a shaft as at 40 and has associated therewith a nozzle manifold 42 positioned adjacent to and fitting around a substantial portion of the turbine wheel.
  • the manifold has an inlet conduit indicated at 44 and a pair of discharge nozzle sections near the extremities of the same indicated at 45, 46 which are effective to discharge air unto opposite surfaces of the turbine wheel.
  • These nozzle sections are shaped to direct air flow substantially normal to the blade surface of the blades of the turbine which are radially positioned so that each nozzle is effective to direct'air impinging directly on the blades adjacent the same in such a manner as to cause rotation of the Wheel in opposite directions.
  • the turbine By proportioning the air being ejected or directed from the nozzle sections on the blades of the turbine wheel, the turbine will assume the resultant rotation in a direction determined by the predominance of air being directed from one or the other of the respective nozzle sections.
  • the blades With this arrangement only a single set of blades is required on the turbine wheel and the blades need not be directionally positioned but are rather directed radially on the periphery of the wheel in a conventional manner, simplifying the structure of the same.
  • FIGURE 4 relates to the diagrammatic disclosure of FIGURE 2.
  • the turbine wheel 38 has associated therewith the manifold 42 with the nozzle sections 46, 45 which receives air through the air inlet 44 which is connected to the sources of air conditioning mediumsuch as is indicated at 12 in FIGURE 1 through a supply conduit 28.
  • a diverting means or valve means indicated by the blade 51 in FIGURE 4 which is pivoted such as at 52 and connected through a linkage 55 to a relay or motive means generally indicated at 56.
  • This motive means includes a diaphragm 58 cooperating with a housing structure 59 to define a pair of chambers 60, 61.
  • the diaphragm 58 has a suitable connecting portion 63 to which the shaft or operating means 55 is connected such that diaphragm movement will be imparted to the shaft to pivot the valve means or blade 51 within the nozzle manifold 42.
  • Chamber 61 may include a return spring (not shown) to bias the diaphragm in a predetermined direction and the shaft 55 is sealed yet movable through the Wall of the casing or housing 59 of the relay or motive means 56.
  • the respective chambers 60, 61 of the pressure responsive motive means or relay receive pressure signals established by the primary controller or thermostat 35 and a feedback valve or flapper nozzle indicated generally at 65, to be more fully described.
  • the air source for the control signals is taken from the supply conduit 28 connected through a conduit indicated at 68. This conduit is connected through a filter indicated generally at 76 and a pair of restrictions '72, 73. The restrictions are located in separate conduits 75, 76 branching off of the filter and extending through a switchover valve 8i) designed to interchange the connections of these conduits to the relay 56, as will be later defined.
  • the conduit extends through the switchover valve 80 and through conduit 32 to the thermostat 35 indicated generally as including a bimetal 83 cooperating with a nozzle 84 terminating at the end of the control conduit 32.
  • the control conduit 76 extending from the switchover valve to a conduit 77 which terminates in a nozzle 88 cooperating with a pivoted flapper 89 of the nozzle flapper 65 which is moved by a cam 90 attached to the output shaft or the output gearing (shown only in FIGURE 2) of the turbine.
  • This output gearing is indicated generally at 95 and the cam is so shaped as to have rise portions indicated at 93, 94 at diametrically opposite positions with dwell portions adjacent thereof, the rise portions corresponding to extremes of movement of the output gearing of the turbine when attached to an associated control device.
  • cam 90 Also included in cam 90 are slots 91, 92 which are designed to limit rotation of the cam and hence the gear train so that the apparatus will properly reverse upon temperature switchover of the system involved.
  • a pivoted lever 96 Associated with the slots 91, 92 is a pivoted lever 96 having pins 97, 99 thereon.
  • This lever is pivoted by a portion 101 of an expansion element for a temperature sensor 98 (to be later defined) so that one or the other of the pins 97, 99 are positioned in their respective slots 91, 92 depending upon which surface the follower 89 is engaging.
  • a temperature sensor 98 to be later defined
  • thermostat 35 will establish a branch line pressure in the conduits 75 and 95 connected from the source and beyond the restriction whenever the switchover valve directly connects the conduits 75 and 32 together. This will establish the branch line pressure in the relay chamber to operate on the diaphragm 58. At the same time the source supply conduit will supply air to the control conduits 76, 77 and 96 and to the chamber 61 of the relay wherein the feedback pressure from the nozzle flapper assembly will be present.
  • Movement of the output gearing will vary this feedback pressure and increase the same as the end of stroke is reached to vary the dilferential pressure between the chambers 60, 61 and tend to return the valve 51 associated therewith in the nozzle manifold to a normal or neutral position wherein both nozzles receive the same amount of air and rotation of turbine wheel 38 is reduced and finally stopped.
  • the switchover valve 80 is conventional and has basically two positions of operation such as is shown by the straight through conduits indicated in phantom in the block 80 and the reversing conduits indicated by the block 80 in phantom connected by a broken line thereto.
  • the valve 80 is operated between these two positions by means of a temperature sensor indicated in block at 98, which as will be seen in FIGURE 2, is designed to be associated with the supply of the air conditioning or tempering medium supplied to the heat exchanger.
  • the turbine operated valve 30 is shown in a diagrammatic form.
  • the turbine wheel 38 is mounted on the shaft 40 which is connected to the output gearing section 95 with the cam 90 therein.
  • This output gearing drives a rotary positioned valve plug (not shown) in a valve 109 which is connected to the supply conduit 23 for the temperature changing medium and leads therefrom through the heat exchanger 21.
  • the nozzle manifold 42 has its inlet passage 44 connected to the supply conduit 28 leading to the circulated air source 12 of the unit ventilator as shown in FIGURE 1.
  • Connected off of the supply conduit 28 is the control conduit 68 leading through a filter section to the relay chamber 56 or motive means. Control passages within this casing lead through the switchover valve indicated in block at to the control conduits 32 and 76 respectively.
  • the changeover temperature sensor 98 is included at the inlet to the valve and includes a thrust section 110 operating through a pivoted linkage 111 to move a valve assembly within the changeover valve 80.
  • the output of the pressure motive means or the shaft 55 leads to the pivoted linkage indicated at 112 which operates the pivoted blade (not shown) in the nozzle manifold 42.
  • thermostat or primary controller 35 will establish a branch line pressure in the conduit 95 and hence the motive chamber 60 of the pressure actuated relay 56 in accordance with the temperature sensed in the space to be air conditioned and cause positioning of the splitter valve or blade 51 within the nozzle manifold 42 to vary the amount of air emanating or being directed from the nozzle 45, 46.
  • This will differentially cause rotation of the turbine wheel 38 in one direction or the other to drive the output gearing and hence the valve associated therewith in an opening direction.
  • the disclosure in FIGURE 4 shows a cam with two high points on the same and dwell portions adjacent thereto such that maximum feedback will be limited to the extremes of travel, here 180 of rotation of the output shaft.
  • the cam configuration for a two-way valve will actually have only one high point and will provide maximum feedback in the maximum opening position and the dwell portion will correspond with the closed position of the valve or the minimum feedback.
  • Limit positioning apparatus is shown in connection with the cam but it will be understood that such apparatus may be included in the controller with which the actuator is associated.
  • the turbine in a two-position valve the turbine may be used which will move from a normal or closed position of the valve at which the cam nozzle flapper arrangement will be in the position of minimum feedback or on the dwell portion of the cam toward the position of rise and maximum feedback as the valve is opened.
  • the remaining portion of the cam will not be used and output movement will be limited by the limits of movement of the valve assembly.
  • the turbine Whenever the temperature changing medium flowing through the heat exchanger 21 is used for heating, the turbine will be caused to rotate in a predetermined direction to cause closing of the valve upon a rise in temperature and drop in control pressure or branch line pressure in the conduit 95 and hence the chamber 60 of relay 56.
  • the same thermostat may be used except that the switchover vlave will interchange the connections between the chambers 60, 61 from the space controller 35 and the feedback assembly 65 as well as the stops on the cam so that the thermostat or branch line pressure will be established in the conduit 96 of chamber 61, causing opposite rotation of the turbine for the same type of thermostat movement to reverse the operation of the controller.
  • FIGURE 5 The disclosure of FIGURE 5 is basically the same turbine operator structure except that the turbine is connected in a damper application rather than a valve application.
  • the air distribution unit in FIGURE 5 schematically depicts an induction type unit ventilator in which the casing 115 is divided into a plurality of chambers, one of whch includes a duct for the source of circulated air. This source is connected through a supply conduit indicated in phantom at to an aspirator section of the induction unit.
  • the casing 115 includes a recirculated air grid or entrance 132 at one surface of the lower extremity. Entrance 132 has a damper associated therewith as at 135 operated through a connecting mechanism 141) leading to a pivoted lever 145.
  • This damper assembly which proportions the amount of return air at the inlet of the unit ventilator casing and may be operated as a part of the turbine actuator or through separate control means such as a pneumatic or electric motive means indicated at 150.
  • the inlet supply pipe for the temperature changing means to the heat exchanger 160 in this embodiment is shown as including a manually operated valve 152 which is connected to the heat exchanger coil assembly 160 positioned within the interior of the casing 115.
  • the turbine operator operates the damper blade 165 which is pivoted on the bottom of the casing and controls the amount of induced air to be directed across the heat exchanger coil or bypassing the same in a conventional induction unit type operation.
  • the turbine operator 30 receives its air supply through the conduit 28 leading to the source 120 and is shown only schematically in FIGURE as it basically includes the same elements shown in FIGURES 2, 3 and 4.
  • the output shaft rather than being connected directly to the valve is connected through a linkage assembly 168 to the pivoted damper for positioning the same.
  • the changeover operation will be obtained from a thermal element associated with the heat exchanger to operate a pivoted linkage and efifecting operation of a changeover valve (not shown).
  • the thermostat control line 32 is shown dotted extending through the casing 115 and up to the space to be air conditioned (not shown) wherein the thermostat 35 is to be located.
  • this apparatus is the same as that disclosed in connection with FIGURE 1 except that the bypass damper will control the amount of induced air directed across the heat exchanger rather than the flow of temperature changing medium through the coil to effect tempering of the air in accordance with the thermostat requirements.
  • the turbine actuator may also, through suitable linkage means, operate the damper to control the amount of recirculated air to the interior of the casing 110 to be induced over the heat exchanger coil or bypassing the same.
  • FIGURE 6 shows a second schematic disclosure of a pneumatic control circuit which may also be used either in control of a damper or as a valve control such as is shown in FIGURE 1.
  • This pneumatic control circuit differs from the embodiment of FIGURE 4 in the use of a different type of changeover circuitry and in a slightly different type of feedback cam as will be hereinafter explained.
  • the apparatus may be applied to the disclosure of FIGURE 5 in the same manner that FIG- URE 4 is applicable thereto. It utilizes the same input supply condut 28 connected to an inlet pipe 68 to the filter 70 as the air source for the control apparatus and the turbine.
  • the turbine as in the previous embodiment, may be directly connected to a high pressure air source 28.
  • the turbine 38 has associated therewith the manifold section 42 to which the air supply conduit 44 from the air source 28 is connected.
  • the filter 70 supplies air for the control portion of the turbine drive apparatus through a slightly different arrangement of parts.
  • the filter has connected thereto a conduit 166 leading to a conduit 167 having a restriction 16S therein.
  • This latter conduit with the restriction 168 therein leads to the chamber 61 of the relay 56 or motive means for the valve or blade 51 in the manifold 42.
  • Blade 51 is pivoted as at 52 within the manifold 42.
  • the casing 519 of the relay has a slight aperture through which the operating shaft 55 of the relay extends.
  • the conduit 166 terminates in a conduit 170 adjacent the point on the relay casing through which shaft 55 extends and the opening through which the shaft extends form a restriction from this supply conduit 170 to the relay chamber 60.
  • a conduit 172 Leading from the relay chamber 60 is a conduit 172 which extends to a changeover valve shown generally at 175, this changeover valve having a pair of outlet conduits 176, 177 associated therewith.
  • the changeover valve shown in section in FIGURE 6 includes basically a shiftable valve closure member 180 which is attached to a motive means or expansion element 181 associated with the temperature sensor 98.
  • the valve closure member 180 is shifted within an opening 182 in the casing 184 of the changeover valve to connect one or the other of the conduits 176, 177 to the inlet conduit 172.
  • the conduits 176, 177 terminate in reverse and direct acting bleed type thermostats included in the general thermostat 35.
  • the thermostat includes separate bimetals and nozzles forming the two thermostats indicated at 185, 186.
  • the thermostat 185 includes a bimetal 188 and a nozzle 189 to which the conduit 177 is connected.
  • the thermostat 186 includes a bimetal 192 and a nozzle 194 to which the control conduit 176 is connected.
  • the thermostat 185 is designated the reverse acting thermostat as used on the cooling cycle for turbine operation while the direct acting thermostat 186 is used in the heating application.
  • the relay'56 has its motive chamber 61 connected by means of a conduit 196 to the feedback flapper nozzle arrangement 65 including the nozzle 88 and the flapper 89.
  • the follower 89 cooperates with a slightly different shaped cam 200 shown positioned on the turbine assembly and adapted to be connected to the same through suitable gear means (not shown).
  • the cam associated with the output shaft also has connected thereto the damper lever 168 and the maximum rotation of this apparatus is limited to 180 rotation.
  • Cam 200 in this embodiment has a single rise portion falling off to a dwell or low point 180 removed therefrom so that maximum pressure at the feedback nozzle will be obtained at one point on the cam and minimum at the other through the entire range of rotation of the cam.
  • the thermostat will control one side of the relay and the feedback pressure the other so that proportional operation may be obtained from the control vane or blade 51 within the nozzle manifold 42 to proportion the flow of air to each side of the turbine and provide a resultant rotation in accordance with the condition sensed.
  • Changeover from one thermostat to the other is effected by the changeover valve which selectively connects one or the other of the bleed nozzles of the thermostats 186, 187 to the chamber 60 in the relay to vary the pressure therein and control the positioning of the control vane or blade within the manifold to provide the desired direction and amount of rotation.
  • This changeover valve is operated by a temperature sensor responding to the temperature of the water or temperature changing medium in the pipe flowing to the heat exchanger (not shown).
  • This arrangement of parts will function basically in the same manner as that described in connection with FIGURE 4.
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of air and to a bleed type thermostat positioned in and responsive to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and to a controller for controlling the flow of conditioned air to be supplied to said space, a cam on the final stage of said output gearing being
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said nozzle manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of air and to a bleed type thermostat positioned in and responsive to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, an actuating relay for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gear
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage to said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pres sure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam mounted on said output gear
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage to said manifold, and a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine Wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gearing
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor Wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine wheel to selectively cause rotation of said turbine Wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium to supply a space to be air conditioned, means Within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine Wheel and including an output shaft connected to a controller for controlling the fiow of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller responsive to a factor affected by said conditioned air and determining the need for operation of said controller controlling the supply of conditioned air to said space to establish a first branch line pressure, means associated with said output shaft to establish a feedback pressure in accordance with the position of operation
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine wheel to selectively cause rotation of said turbine Wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium to supply a space to be air conditioned, means Within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine Wheel and including an output shaft connected to a controller for controlling the flow of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller responsive to a factor affected by said conditioned air and determining the need for operation of said controller controlling the supply of conditioned air to said space to establish a first branch line pressure, means associated with said output shaft to establish a feedback pressure in accordance with the position of operation of
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said nozzle manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responsive to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine Wheel, motive means for operating said diverting valve, means connecting said first named control conduit to said motive means, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam on said output gearing being positioned thereby
  • Air conditioning control apparatus comprising, an
  • air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted Wheel, an air inlet passage in said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine Wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and respond to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, an actuating relay for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gearing and positioned thereby and having rise
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine Wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine Wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam on said output gearing to be
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine Wheel to selectively cause rotation of said turbine wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium to supply a space to be air conditioned, means within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine wheel and including an output shaft connected to a controller for controlling the amount of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller connected to said source and responsive to a factor affected by said conditioned air and determining the need for operation of said controller to establish a first branch line pressure, means associated with said output shaft connected to said source to establish a feedback pressure in accordance with the position of operation of said
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor Wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine Wheel to selectively cause rotation of said turbine wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium which source is adapted to supply a space to be air conditioned, means within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine wheel and including an output shaft connected to a controller for controlling the amount of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller connected to said source and to a factor affected by said conditioned air and determining the need for operation of said controller controlling the supply of conditioned air to said space to establish a first branch line pressure, means associated with said output shaft and connected to said source to
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage to said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion Cir the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and to a controller for controlling the amount of conditioned air to be supplied to said space, a cam mounted on said output gearing to be
  • Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said manifold, and a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine Wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine Wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gearing

Description

June 23, 1964 J. BERGER 3,138,326
AIR CONDITIONING CONTROL APPARATUS Filed Aug. 23, 1962 I 3 Sheets-Sheet l INVENTOR. AZVAVJBEEGE'E I 2 4770P/1/EV June 23, 1964 A. J. BERGER AIR CONDITIONING CONTROL APPARATUS 5 Sheets-Sheet 2 Filed Aug. 25, 1962 TEMPERATURE SENSOR INVENTOR. ALI/YA/J 35562;?
5 AZ, ATTORNEY June 23, 1964 A. J. BERGER AIR CONDITIONING CONTROL APPARATUS 3 Sheets-Sheet 3 Filed Aug. 23, 1962 INVENTOR. A: VIA/cl BERGER 4rroe/va United States Patent "ice 3,138,326 AIR CQNDETEQNING CONTRGL APPARATUS Alvin .I. Berger, Morton Grove, iii, assignor to Minneapolis-Honeyweli Regulator Company, Minneapolis, Minn, a corporation of Delaware Filed Aug. 23, 1962, Ser. No. 218,923 13 Claims. (Cl. 2361) This invention relates to air conditioning control apparatus and more particularly to an improved valving system of the turbine type adapted to control air distribution units such as fan coil or induction type air conditioners.
Air conditioning control apparatus for unit ventilators and air distribution units are well recognized and the commonly assigned copending application of Richard C. Mott, Serial No. 189,023, filed April 20, 1962, discloses such a unit utilizing a turbine driven valve operator. The present invention is directed to an improvement over the disclosure in the Mott application in that it provides proportioning control rather than on-ofI or floating type control, and a more simple design of nozzle and turbine assembly and means for controlling the same with improved means for switchover in the operation of the apparatus and in the sensing units.
Therefore it is an object of this invention to provide an improved air conditioning control apparatus of the selfcontained turbine drive type. Another object of this invention is to provide an improved proportioning type air conditioning control apparatus. A still further object of this invention is to provide in an improved air conditioning control apparatus, a turbine drive actuator in a control system of the self-contained type with provision for feedback to provide proportioning control operation. Another object of this invention is to provide a system of this type with simplified changeover operation for direct and reverse operation of the actuator from the same primary controller. These and other objects of this invention will become apparent from a reading of the attached description together with the drawings wherein:
FIGURE 1 is a schematic disclosure of an air distribution unit utilizing improved control apparatus in the control of a valve to a heat exchanger,
FIGURE 2 is a diagrammatic disclosure of the improved turbine drive applied to a valve,
FIGURE 3 is a schematic disclosure of a portion of the turbine,
FIGURE 4 is a schematic disclosure of the pneumatic control system,
FIGURE 5 is a schematic disclosure of the second type of unit ventilator of the induction type, utilizing the improved turbine drive valve as a damper operator, and
FIGURE 6 is a schematic disclosure of a second em bodiment of the pneumatic control system.
The disclosure of FIGURE 1 shows an application of the improved air conditioning control apparatus to a unit ventilator or air distribution unit of the type which receives a supply of circulated air for air circulation purposes. The air distribution is shown schematically as comprising a box 10 having an air inlet conduit or supply conduit 12 connected thereto and a discharge opening indicated generally at 14. The unit is designed to be positioned in or adjacent to a space to be air conditioned such as is indicated in phantom at 20. Circulated air is tempered by means of fiow of the air conditioning medium or tempering medium through a heat exchanger such as indicated at 21 from a supply conduit indicated at 23. Flow of the air conditioning medium through the heat exchanger from the supply conduit is controlled by means of a valve 22 controlled or operated by the improved turbine drive apparatus indicated generally at 30.
Patented June 23, 1964 Return of the air conditioning medium to the source is through the return conduit 25. The turbine actuator which will be more fully disclosed in FIGURES 2, 3 and 4 receives a supply of air conditioning medium for driving purposes through a conduit indicated at 28. Similarly a control conduit indicated at 32 is connected to a thermostat indicated generally at 35 positioned in the space to be air conditioned.
As will be best seen in FIGURES 2, 3 and 4, improved turbine actuator is comprised of a turbine wheel 38 which is pivoted or mounted on a shaft as at 40 and has associated therewith a nozzle manifold 42 positioned adjacent to and fitting around a substantial portion of the turbine wheel. The manifold has an inlet conduit indicated at 44 and a pair of discharge nozzle sections near the extremities of the same indicated at 45, 46 which are effective to discharge air unto opposite surfaces of the turbine wheel. These nozzle sections are shaped to direct air flow substantially normal to the blade surface of the blades of the turbine which are radially positioned so that each nozzle is effective to direct'air impinging directly on the blades adjacent the same in such a manner as to cause rotation of the Wheel in opposite directions. By proportioning the air being ejected or directed from the nozzle sections on the blades of the turbine wheel, the turbine will assume the resultant rotation in a direction determined by the predominance of air being directed from one or the other of the respective nozzle sections. With this arrangement only a single set of blades is required on the turbine wheel and the blades need not be directionally positioned but are rather directed radially on the periphery of the wheel in a conventional manner, simplifying the structure of the same.
The use of the turbine or its cooperation with the remaining parts of the control apparatus will best be seen in the schematic disclosure of FIGURE 4 which relates to the diagrammatic disclosure of FIGURE 2. Thus, as best seen in FIGURE 4 the turbine wheel 38 has associated therewith the manifold 42 with the nozzle sections 46, 45 which receives air through the air inlet 44 which is connected to the sources of air conditioning mediumsuch as is indicated at 12 in FIGURE 1 through a supply conduit 28. Positioned within the nozzle manifold 42 is a diverting means or valve means indicated by the blade 51 in FIGURE 4 which is pivoted such as at 52 and connected through a linkage 55 to a relay or motive means generally indicated at 56. This motive means includes a diaphragm 58 cooperating with a housing structure 59 to define a pair of chambers 60, 61. The diaphragm 58 has a suitable connecting portion 63 to which the shaft or operating means 55 is connected such that diaphragm movement will be imparted to the shaft to pivot the valve means or blade 51 within the nozzle manifold 42. Chamber 61 may include a return spring (not shown) to bias the diaphragm in a predetermined direction and the shaft 55 is sealed yet movable through the Wall of the casing or housing 59 of the relay or motive means 56. The respective chambers 60, 61 of the pressure responsive motive means or relay receive pressure signals established by the primary controller or thermostat 35 and a feedback valve or flapper nozzle indicated generally at 65, to be more fully described. The air source for the control signals is taken from the supply conduit 28 connected through a conduit indicated at 68. This conduit is connected through a filter indicated generally at 76 and a pair of restrictions '72, 73. The restrictions are located in separate conduits 75, 76 branching off of the filter and extending through a switchover valve 8i) designed to interchange the connections of these conduits to the relay 56, as will be later defined. The conduit extends through the switchover valve 80 and through conduit 32 to the thermostat 35 indicated generally as including a bimetal 83 cooperating with a nozzle 84 terminating at the end of the control conduit 32. Similarly, the control conduit 76 extending from the switchover valve to a conduit 77 which terminates in a nozzle 88 cooperating with a pivoted flapper 89 of the nozzle flapper 65 which is moved by a cam 90 attached to the output shaft or the output gearing (shown only in FIGURE 2) of the turbine. This output gearing is indicated generally at 95 and the cam is so shaped as to have rise portions indicated at 93, 94 at diametrically opposite positions with dwell portions adjacent thereof, the rise portions corresponding to extremes of movement of the output gearing of the turbine when attached to an associated control device. Also included in cam 90 are slots 91, 92 which are designed to limit rotation of the cam and hence the gear train so that the apparatus will properly reverse upon temperature switchover of the system involved. Associated with the slots 91, 92 is a pivoted lever 96 having pins 97, 99 thereon. This lever is pivoted by a portion 101 of an expansion element for a temperature sensor 98 (to be later defined) so that one or the other of the pins 97, 99 are positioned in their respective slots 91, 92 depending upon which surface the follower 89 is engaging. When the cam rise portion moves the follower 89 relative to the nozzle 88, pressure will build up in the conduit 76 as the flapper approaches the nozzle to increase the branch line or feedback pressure in the conduit 76. Connected to the conduit 75, 76 ahead of the switchover valve are conduits 95, 96 respectively which lead to the chambers 60, 61 of the pressure responsive relay or motive means for pivoting the damper or valve in the nozzle manifold 42. Thus, as will be seen in FIGURE 4, thermostat 35 will establish a branch line pressure in the conduits 75 and 95 connected from the source and beyond the restriction whenever the switchover valve directly connects the conduits 75 and 32 together. This will establish the branch line pressure in the relay chamber to operate on the diaphragm 58. At the same time the source supply conduit will supply air to the control conduits 76, 77 and 96 and to the chamber 61 of the relay wherein the feedback pressure from the nozzle flapper assembly will be present. Movement of the output gearing will vary this feedback pressure and increase the same as the end of stroke is reached to vary the dilferential pressure between the chambers 60, 61 and tend to return the valve 51 associated therewith in the nozzle manifold to a normal or neutral position wherein both nozzles receive the same amount of air and rotation of turbine wheel 38 is reduced and finally stopped.
It will be seen in FIGURE 4 that the switchover valve 80 is conventional and has basically two positions of operation such as is shown by the straight through conduits indicated in phantom in the block 80 and the reversing conduits indicated by the block 80 in phantom connected by a broken line thereto. The valve 80 is operated between these two positions by means of a temperature sensor indicated in block at 98, which as will be seen in FIGURE 2, is designed to be associated with the supply of the air conditioning or tempering medium supplied to the heat exchanger.
Referring to FIGURE 2, the turbine operated valve 30 is shown in a diagrammatic form. The turbine wheel 38 is mounted on the shaft 40 which is connected to the output gearing section 95 with the cam 90 therein. This output gearing drives a rotary positioned valve plug (not shown) in a valve 109 which is connected to the supply conduit 23 for the temperature changing medium and leads therefrom through the heat exchanger 21. The nozzle manifold 42 has its inlet passage 44 connected to the supply conduit 28 leading to the circulated air source 12 of the unit ventilator as shown in FIGURE 1. Connected off of the supply conduit 28 is the control conduit 68 leading through a filter section to the relay chamber 56 or motive means. Control passages within this casing lead through the switchover valve indicated in block at to the control conduits 32 and 76 respectively. These conduits are connected to the thermostats or primary controller 35 and into the output gearing and cam section to the nozzle flapper section located within this section (not shown). The changeover temperature sensor 98 is included at the inlet to the valve and includes a thrust section 110 operating through a pivoted linkage 111 to move a valve assembly within the changeover valve 80. The output of the pressure motive means or the shaft 55 leads to the pivoted linkage indicated at 112 which operates the pivoted blade (not shown) in the nozzle manifold 42.
Thus, it will be seen that the thermostat or primary controller 35 will establish a branch line pressure in the conduit 95 and hence the motive chamber 60 of the pressure actuated relay 56 in accordance with the temperature sensed in the space to be air conditioned and cause positioning of the splitter valve or blade 51 within the nozzle manifold 42 to vary the amount of air emanating or being directed from the nozzle 45, 46. This will differentially cause rotation of the turbine wheel 38 in one direction or the other to drive the output gearing and hence the valve associated therewith in an opening direction. The disclosure in FIGURE 4 shows a cam with two high points on the same and dwell portions adjacent thereto such that maximum feedback will be limited to the extremes of travel, here 180 of rotation of the output shaft. The cam configuration for a two-way valve will actually have only one high point and will provide maximum feedback in the maximum opening position and the dwell portion will correspond with the closed position of the valve or the minimum feedback. Limit positioning apparatus is shown in connection with the cam but it will be understood that such apparatus may be included in the controller with which the actuator is associated. Thus, for the purpose of the disclosure of FIG- URE 2, in a two-position valve the turbine may be used which will move from a normal or closed position of the valve at which the cam nozzle flapper arrangement will be in the position of minimum feedback or on the dwell portion of the cam toward the position of rise and maximum feedback as the valve is opened. In the two positioning device, the remaining portion of the cam will not be used and output movement will be limited by the limits of movement of the valve assembly.
Whenever the temperature changing medium flowing through the heat exchanger 21 is used for heating, the turbine will be caused to rotate in a predetermined direction to cause closing of the valve upon a rise in temperature and drop in control pressure or branch line pressure in the conduit 95 and hence the chamber 60 of relay 56. When the temperature changing medium is used for cooling, the same thermostat may be used except that the switchover vlave will interchange the connections between the chambers 60, 61 from the space controller 35 and the feedback assembly 65 as well as the stops on the cam so that the thermostat or branch line pressure will be established in the conduit 96 of chamber 61, causing opposite rotation of the turbine for the same type of thermostat movement to reverse the operation of the controller.
The disclosure of FIGURE 5 is basically the same turbine operator structure except that the turbine is connected in a damper application rather than a valve application. The air distribution unit in FIGURE 5 schematically depicts an induction type unit ventilator in which the casing 115 is divided into a plurality of chambers, one of whch includes a duct for the source of circulated air. This source is connected through a supply conduit indicated in phantom at to an aspirator section of the induction unit. The casing 115 includes a recirculated air grid or entrance 132 at one surface of the lower extremity. Entrance 132 has a damper associated therewith as at 135 operated through a connecting mechanism 141) leading to a pivoted lever 145. This damper assembly which proportions the amount of return air at the inlet of the unit ventilator casing and may be operated as a part of the turbine actuator or through separate control means such as a pneumatic or electric motive means indicated at 150. The inlet supply pipe for the temperature changing means to the heat exchanger 160 in this embodiment is shown as including a manually operated valve 152 which is connected to the heat exchanger coil assembly 160 positioned within the interior of the casing 115. The turbine operator operates the damper blade 165 which is pivoted on the bottom of the casing and controls the amount of induced air to be directed across the heat exchanger coil or bypassing the same in a conventional induction unit type operation. The turbine operator 30 receives its air supply through the conduit 28 leading to the source 120 and is shown only schematically in FIGURE as it basically includes the same elements shown in FIGURES 2, 3 and 4. The output shaft rather than being connected directly to the valve is connected through a linkage assembly 168 to the pivoted damper for positioning the same. Although not shown, however, it will be understood that the changeover operation will be obtained from a thermal element associated with the heat exchanger to operate a pivoted linkage and efifecting operation of a changeover valve (not shown). The thermostat control line 32 is shown dotted extending through the casing 115 and up to the space to be air conditioned (not shown) wherein the thermostat 35 is to be located.
In operation, this apparatus is the same as that disclosed in connection with FIGURE 1 except that the bypass damper will control the amount of induced air directed across the heat exchanger rather than the flow of temperature changing medium through the coil to effect tempering of the air in accordance with the thermostat requirements. It will be understood also that the turbine actuator may also, through suitable linkage means, operate the damper to control the amount of recirculated air to the interior of the casing 110 to be induced over the heat exchanger coil or bypassing the same.
FIGURE 6 shows a second schematic disclosure of a pneumatic control circuit which may also be used either in control of a damper or as a valve control such as is shown in FIGURE 1. This pneumatic control circuit differs from the embodiment of FIGURE 4 in the use of a different type of changeover circuitry and in a slightly different type of feedback cam as will be hereinafter explained. Basically, the apparatus may be applied to the disclosure of FIGURE 5 in the same manner that FIG- URE 4 is applicable thereto. It utilizes the same input supply condut 28 connected to an inlet pipe 68 to the filter 70 as the air source for the control apparatus and the turbine. The turbine, as in the previous embodiment, may be directly connected to a high pressure air source 28. The turbine 38 has associated therewith the manifold section 42 to which the air supply conduit 44 from the air source 28 is connected. Similarly, the filter 70 supplies air for the control portion of the turbine drive apparatus through a slightly different arrangement of parts. Thus, as seen in FIGURE 6, the filter has connected thereto a conduit 166 leading to a conduit 167 having a restriction 16S therein. This latter conduit with the restriction 168 therein leads to the chamber 61 of the relay 56 or motive means for the valve or blade 51 in the manifold 42. Blade 51 is pivoted as at 52 within the manifold 42. The casing 519 of the relay has a slight aperture through which the operating shaft 55 of the relay extends. The conduit 166 terminates in a conduit 170 adjacent the point on the relay casing through which shaft 55 extends and the opening through which the shaft extends form a restriction from this supply conduit 170 to the relay chamber 60. Leading from the relay chamber 60 is a conduit 172 which extends to a changeover valve shown generally at 175, this changeover valve having a pair of outlet conduits 176, 177 associated therewith. The changeover valve shown in section in FIGURE 6 includes basically a shiftable valve closure member 180 which is attached to a motive means or expansion element 181 associated with the temperature sensor 98. The valve closure member 180 is shifted within an opening 182 in the casing 184 of the changeover valve to connect one or the other of the conduits 176, 177 to the inlet conduit 172. The conduits 176, 177 terminate in reverse and direct acting bleed type thermostats included in the general thermostat 35.
Thus, in this embodiment, the thermostat includes separate bimetals and nozzles forming the two thermostats indicated at 185, 186. The thermostat 185 includes a bimetal 188 and a nozzle 189 to which the conduit 177 is connected. Similarly the thermostat 186 includes a bimetal 192 and a nozzle 194 to which the control conduit 176 is connected. The thermostat 185 is designated the reverse acting thermostat as used on the cooling cycle for turbine operation while the direct acting thermostat 186 is used in the heating application. By shifting the changeover valve 175, one or the other of the conduits 176, 177 and hence one or the other of the thermostats 185, 186 will be connected into the control conduit 172 leading to the motive chamber 60 of the relay or motive means shifting the splitter valve means within the turbine manifold 42.
In addition, the relay'56 has its motive chamber 61 connected by means of a conduit 196 to the feedback flapper nozzle arrangement 65 including the nozzle 88 and the flapper 89. In this embodiment the follower 89 cooperates with a slightly different shaped cam 200 shown positioned on the turbine assembly and adapted to be connected to the same through suitable gear means (not shown). The cam associated with the output shaft also has connected thereto the damper lever 168 and the maximum rotation of this apparatus is limited to 180 rotation. Cam 200 in this embodiment has a single rise portion falling off to a dwell or low point 180 removed therefrom so that maximum pressure at the feedback nozzle will be obtained at one point on the cam and minimum at the other through the entire range of rotation of the cam. Thus, as in the embodiment of FIGURE 4, the thermostat will control one side of the relay and the feedback pressure the other so that proportional operation may be obtained from the control vane or blade 51 within the nozzle manifold 42 to proportion the flow of air to each side of the turbine and provide a resultant rotation in accordance with the condition sensed. Changeover from one thermostat to the other is effected by the changeover valve which selectively connects one or the other of the bleed nozzles of the thermostats 186, 187 to the chamber 60 in the relay to vary the pressure therein and control the positioning of the control vane or blade within the manifold to provide the desired direction and amount of rotation. This changeover valve, as in the preceding embodiments, is operated by a temperature sensor responding to the temperature of the water or temperature changing medium in the pipe flowing to the heat exchanger (not shown). This arrangement of parts will function basically in the same manner as that described in connection with FIGURE 4.
In considering this invention it should be remembered that the present disclosure is intended to be illustrative only and the scope of the invention should be determined only by the appended claims.
I claim as my invention:
1. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of air and to a bleed type thermostat positioned in and responsive to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and to a controller for controlling the flow of conditioned air to be supplied to said space, a cam on the final stage of said output gearing being positioned thereby and having a rise portion corresponding to the limit of travel of said gearing and a limiting position of said controller, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle flapper means and including said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the motive means controlling said diverting valve.
2. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said nozzle manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of air and to a bleed type thermostat positioned in and responsive to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, an actuating relay for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gearing and positioned thereby having a rise portion corresponding to the limit of travel of said gearing and a limiting position of said controller, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle flapper means and including said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the actuating relay controlling said diverting valve, said cam on said output gearing being effective to increase the pressure in said nozzle flapper and hence the pressure responsive means of said actuating relay in opposition to the thermostat pressure as the turbine is operated toward said limit position.
3. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage to said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pres sure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam mounted on said output gearing to be positioned thereby and having a rise portion corresponding to the limit of travel of said gearing and a limiting position of said controller, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle flapper means and including said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the motive means controlling said diverting valve, and changeover valve means connected to the control conduits leading to said thermostat and said feedback nozzle and flapper and adapted to reverse the connections between said thermostat, said nozzle flapper and said pressure responsive means of said motive means, said changeover valve means being effective to reverse the operation of said turbine for given temperature changes in said space.
4. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage to said manifold, and a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine Wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gearing to be positioned thereby and having a rise portion corresponding to the limit of travel of said gearing and a limiting position of said controller, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle flapper means and including said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the motive means controlling said diverting valve, changeover valve means connected to the control conduits leading to said thermostat and said feedback nozzle and flapper to reverse the connections between said thermostat, said nozzle flapper and said pressure responsive means of said motive means, said changeover valve means being effective to reverse the operation of said turbine for given temperature changes in said space, and temperature responsive means responsive to a factor controlling the temperature of said air conditioning medium for operating said changeover valve.
5. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor Wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine wheel to selectively cause rotation of said turbine Wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium to supply a space to be air conditioned, means Within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine Wheel and including an output shaft connected to a controller for controlling the fiow of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller responsive to a factor affected by said conditioned air and determining the need for operation of said controller controlling the supply of conditioned air to said space to establish a first branch line pressure, means associated with said output shaft to establish a feedback pressure in accordance with the position of operation of said turbine and controller, said branch line pressure and said feedback pressure differentially controlling the means operating said proportioning means to control the direction of rotation of said turbine.
6. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine wheel to selectively cause rotation of said turbine Wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium to supply a space to be air conditioned, means Within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine Wheel and including an output shaft connected to a controller for controlling the flow of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller responsive to a factor affected by said conditioned air and determining the need for operation of said controller controlling the supply of conditioned air to said space to establish a first branch line pressure, means associated with said output shaft to establish a feedback pressure in accordance with the position of operation of said turbine and controller, said branch line pressure and said feedback pressure differentially controlling the means operating said diverting means to control the direction of rotation of said turbine, and means for reversing the effect of said branch and feedback pressures on said operating means.
7. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said nozzle manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responsive to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine Wheel, motive means for operating said diverting valve, means connecting said first named control conduit to said motive means, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam on said output gearing being positioned thereby and having a rise portion corresponding to the limit of travel of said gearing, pneumatic control means operated by said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle flapper means and including additional conduit means connected to said motive to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the motive means controlling said diverting valve.
8. Air conditioning control apparatus comprising, an
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air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted Wheel, an air inlet passage in said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine Wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and respond to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, an actuating relay for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gearing and positioned thereby and having rise portions corresponding to the limits of travel of said gearing and limiting positions of said controller, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle flapper means and connected to said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the actuating relay controlling said diverting valve, said cam on said output gearing being effective to increase the pressure in said nozzle flapper and hence the pressure responsive means of said actuating relay in opposition to the thermostat pressure as the turbine is operated toward said limit positions.
9. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine Wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine Wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam on said output gearing to be positioned thereby and having rise portions corresponding to the limits of travel of said gearing, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle fiapper means and connected to said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the motive means controlling said diverting valve, and changeover valve means connected to the control conduits leading to sm'd thermostat and said feedback nozzle and flapper to reverse the connections between said thermostat, said nozzle flapper and said pressure responsive means of said motive means, said changeover valve means being effective to reverse the operation of said turbine for given temperature changes in said space.
10. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine Wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine Wheel to selectively cause rotation of said turbine wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium to supply a space to be air conditioned, means within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine wheel and including an output shaft connected to a controller for controlling the amount of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller connected to said source and responsive to a factor affected by said conditioned air and determining the need for operation of said controller to establish a first branch line pressure, means associated with said output shaft connected to said source to establish a feedback pressure in accordance with the position of operation of said turbine and controller, means connecting said primary controller and said means associated with said output shaft to said operating means so that said branch line pressure and said feedback pressure differentially control the means operating said proportioning means to control the direction of rotation of said turbine.
11. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and around a portion of said pivoted rotor Wheel, a pair of discharge nozzles positioned in said manifold on opposite surfaces of said turbine Wheel to selectively cause rotation of said turbine wheel in opposite directions, an inlet passage to said manifold connected to a source of air conditioning medium which source is adapted to supply a space to be air conditioned, means within said manifold for proportioning the flow of air to said nozzles to cause direction of rotation of said turbine wheel, gearing associated with said turbine wheel and including an output shaft connected to a controller for controlling the amount of conditioned air to be supplied to said space, means for operating said last named means to differentially direct flow through said manifold nozzles, a primary controller connected to said source and to a factor affected by said conditioned air and determining the need for operation of said controller controlling the supply of conditioned air to said space to establish a first branch line pressure, means associated with said output shaft and connected to said source to establish a feedback pressure in accordance with the position of operation of said turbine and controller, means connecting said controller and said last named means establishing said branch line pressure and said feedback pressure differentially to the means operating said proportioning means to control the direction of rotation of said turbine, and means for reversing the last named connecting means to reverse the effect of said branch and feedback pressures on said proportioning means.
12. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage to said manifold, a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion Cir the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine wheel and to a controller for controlling the amount of conditioned air to be supplied to said space, a cam mounted on said output gearing to be positioned thereby and having a rise portion corresponding to the limit of travel of said gearing and a limiting position of said controller, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle fiapper means and including said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the motive means controlling said diverting valve, and changeover valve means included in at least one of said conduits from said motive means and operative to reverse the operation of said motive means and said turbine with a given change in temperature in the space to be air conditioned.
13. Air conditioning control apparatus comprising, an air driven turbine including a pivoted turbine wheel and a nozzle manifold positioned adjacent to and fitting around a portion of said pivoted wheel, an air inlet passage in said manifold, and a pair of discharge nozzles positioned in said nozzle manifold adjacent opposite surfaces of said turbine wheel, the inlet passage to said nozzle manifold being connected to a source of temperate air to be supplied to a space to be air conditioned, a first control conduit connected to said source of conditioned air and to a bleed type thermostat positioned in and responding to the temperature of the space to be air conditioned, a diverting valve in said nozzle manifold to proportion the flow of conditioned air from said source to said nozzles to control the direction of rotation of said turbine Wheel, motive means for operating said diverting valve including pressure responsive means, said pressure responsive means being connected to said first named control conduit, output gearing connected to said turbine Wheel and connected to a controller for controlling the amount of conditioned air to be supplied to said space, a cam connected to said output gearing to be positioned thereby and having a rise portion corresponding to the limit of travel of said gearing and a limiting position of said controller, nozzle flapper means associated with said cam on said output gearing, second control conduit means connected from said source of supply to said nozzle flapper means and including said pressure responsive means to provide a pressure in opposition to a pressure established by said thermostat to effect feedback operation on the motive mean controlling said diverting valve, changeover valve means connected to the control conduits leading to said thermostat to reverse the connection between said thermostat and said pressure responsive means of said motive means, said changeover valve means being effective to reverse the operation of said turbine for given temperature changes in said space, and temperature responsive means responsive to a factor controlling the temperature of said air conditioning medium for operating said changeover valve.
References Cited in the file of this patent UNITED STATES PATENTS

Claims (1)

1. AIR CONDITIONING CONTROL APPARATUS COMPRISING, AN AIR DRIVEN TURBINE INCLUDING A PIVOTED TURBINE WHEEL AND A NOZZLE MANIFOLD POSITIONED ADJACENT TO AND FITTING AROUND A PORTION OF SAID PIVOTED WHEEL, AN AIR INLET PASSAGE IN SAID MANIFOLD, A PAIR OF DISCHARGE NOZZLES POSITIONED IN SAID NOZZLE MANIFOLD ADJACENT OPPOSITE SURFACES OF SAID TURBINE WHEEL, THE INLET PASSAGE TO SAID NOZZLE MANIFOLD BEING CONNECTED TO A SOURCE OF TEMPERATE AIR TO BE SUPPLIED TO A SPACE TO BE AIR CONDITIONED, A FIRST CONTROL CONDUIT CONNECTED TO SAID SOURCE OF AIR AND TO A BLEED TYPE THERMOSTAT POSITIONED IN AND RESPONSIVE TO THE TEMPERATURE OF THE SPACE TO BE AIR CONDITIONED, A DIVERTING VALVE IN SAID NOZZLE MANIFOLD TO PROPORTION THE FLOW OF CONDITIONED AIR FROM SAID SOURCE TO SAID NOZZLES TO CONTROL THE DIRECTION OF ROTATION OF SAID TURBINE WHEEL, MOTIVE MEANS FOR OPERATING SAID DIVERTING VALVE INCLUDING PRESSURE RESPONSIVE MEANS, SAID PRESSURE RESPONSIVE MEANS BEING CONNECTED TO SAID FIRST NAMED CONTROL CONDUIT, OUTPUT GEARING CONNECTED TO SAID TURBINE WHEEL AND TO A CONTROLLER FOR CONTROLLING THE FLOW OF CONDITIONED AIR TO BE SUPPLIED TO SAID SPACE, A CAM ON THE FINAL STAGE OF SAID OUTPUT GEARING BEING POSITIONED THEREBY AND HAVING A RISE PORTION CORRESPONDING TO THE LIMIT OF TRAVEL OF SAID GEARING AND A LIMITING POSITION OF SAID CONTROLLER, NOZZLE FLAPPER MEANS ASSOCIATED WITH SAID CAM ON SAID OUTPUT GEARING, SECOND CONTROL CONDUIT MEANS CONNECTED FROM SAID SOURCE OF SUPPLY TO SAID NOZZLE FLAPPER MEANS AND INCLUDING SAID PRESSURE RESPONSIVE MEANS TO PROVIDE A PRESSURE IN OPPOSITION TO A PRESSURE ESTABLISHED BY SAID THERMOSTAT TO EFFECT FEEDBACK OPERATION ON THE MOTIVE MEANS CONTROLLING SAID DIVERTING VALVE.
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US2537367A (en) * 1948-07-02 1951-01-09 Chrysler Corp Drive for air controlling grilles

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US1518127A (en) * 1920-05-05 1924-12-09 Baetz Henry Ventilating apparatus
US2533175A (en) * 1947-01-03 1950-12-05 Chrysler Corp Air controlling grille
US2537367A (en) * 1948-07-02 1951-01-09 Chrysler Corp Drive for air controlling grilles

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060231246A1 (en) * 2005-04-15 2006-10-19 T.K.M. Contracting & Metal Industry Ltd. Fan coil controller
US7131490B1 (en) * 2005-04-15 2006-11-07 T.K.M. Contracting And Metal Industry Ltd. Fan coil controller

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