US3921413A - Air conditioning unit with reheat - Google Patents
Air conditioning unit with reheat Download PDFInfo
- Publication number
- US3921413A US3921413A US523478A US52347874A US3921413A US 3921413 A US3921413 A US 3921413A US 523478 A US523478 A US 523478A US 52347874 A US52347874 A US 52347874A US 3921413 A US3921413 A US 3921413A
- Authority
- US
- United States
- Prior art keywords
- air
- served
- zone
- served zone
- deck portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F3/12—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 characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—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 characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/153—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 characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
-
- 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
-
- 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
- F24F3/0525—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 the air treated in the central station is reheated
Definitions
- An air-conditioning unit of the reheat-type particularly well suited for supplying conditioned air to a plurality of remotely located served zones has two condensers connected by parallel conduits to a reheat coil located in a hot deck of the unit and a refrigerant flow regulating valve responsive to served zone air parameters disposed in one of the parallel conduits for regulating the flow of refrigerant from one of the condens ers to the reheat coil.
- the present invention relates to air conditioning units and more particularly to an air conditioning unit having a reheat coil to reheat air which has been previously cooled and dehumidified.
- Airconditioning units having a reheat coil utilizing hot refrigerant as the reheating media are known.
- One such heretofore known unit shown in U.S. Pat. NO. 3,631,686 issued on Jan. 4, 1972 to Franz P. Kautz, has two refrigerant condensers piped in parallel to a reheat coil located in a hot deck of the unit and a control valve in one of the pipes, which valve is responsive to the temperature of an air stream in heat exchange relationship with the reheat coil so that as the air stream temperature leaving the reheat coil goes below a predetermined temperature, the control valve closes causing one of the condensers to flood with liquid refrigerant, thus, decreasing the effectiveness of the other condenser.
- the other condenser is not capable of condensing the entire volume of gaseous refrigerant it now receives from the compressor, it discharges a mixture of liquid and gaseous refrigerant to the reheat thereby forcing the reheat coil to function as a condenser.
- a reheat event should bbe initiated or controlled by the actual air conditions or parameters prevailing within the zones served by the air conditioning unit.
- zone air parameters comprise solar heat gain or loss through windows, roofs, ceilings and doors; internal heat gain from people and euipment within the served zone; and heat gain or loss from infiltration of outside air; another air parameter is, of course, humidity.
- Additional factors which effect the amount of heat to be supplied by a heating source to a zone include a compensating amount of heat for the heat lost from the heating air stream as it is transmitted through the ducts to the zone and for any ventilating air introduced into the served zone.
- the above-described prior art air-conditioning unit ignores these prefailing conditions within the served zone and instead controls or initiates the reheat event in response to an arbitrary predetermined temperature setting at the reheat coil which is located in a hot deck of the unit remote from the served zones.
- the present invention recognizes the need for initiating and controlling a reheat event by the actual prevailing air conditions within the served zones and provides an air-conditioning unit of the reheat-type which has a refrigerant regulating valve responsive to the conditions of the air within the served zones for controlling the flow of refrigerant from a condenser to a reheat coil. More particularly, the present invention provides an air-conditioning unit of the reheat-type for supplying conditioned air to at least one remotely located served space, the air-conditioning unit comprising:
- a reheat coil in the hot deck portion for selectively reheating the air stream flowing through the hot deck portion
- At least one compressor having its pressure side in refrigerant flow communication with the condensers;
- an evaporator disposed upstream of the reheat coil for selectively cooling an air stream to be routed into the hot deck portion and the cold deck portion, the evaporator being in refrigerant flow communication with the reheat coil and with the suction side of the compressor;
- a refrigerant flow regulating valve for controlling the flow of refrigerant between at least one of the condensers and the reheat coil
- a served zone air condition sensor disposed within each of the served zones, the sensor being immediately responsive to the conditions of the air within the served zones for actuating the regulating valve to restrict the flow of refrigerant from one of the condensers to the reheat coil when the served zone air conditions deviate from a desired condition.
- FIG. I is a schematic representation of an air conditioning unit utilizing the present invention.
- FIG. 2 illustrates one operating mode of the air conditioning unit of FIG. 1
- FIG. 3 illustrates another operating mode of the air conditioning unit of FIG. 1;
- FIG. 4 illustrates yet another operating mode of the air conditioning unit of FIG. 1
- air conditioning includes heating as well as cooling the air to be treated.
- an air conditioning unit generally denoted as the numeral 10, which is particularly well suited for supplying conditioned air to a plurality of remotely located served spaces or zones (not shown).
- an air conditioning unit of the type illustrated is mounted on the roof of a building and is, therefore, referred to in industry as a roof-mounted multi-zone unit.
- the multi-zone air-conditioning unit 10 comprises a housing 12; a refrigeration system, generally denoted as the numeral 14, disposed within the housing 12; and a refrigerant control system, generally denoted as the numeral 16.
- the housing 12 comprises a hot deck portion 20 through which heated air flows, and a cold deck portion 22 through which cooled air flows. Furthermore, a plurality of hot deck zone dampers 24 are disposed at the outlet from the hot deck 20 and a plurality of cold deck zone dampers 26 are disposed at the outlet from the cold deck 22 to selectively route an air stream through the decks.
- the number of hot deck dampers 24 and number of cold deck dampers 26 are dictated by, and are equal in number to the number of zones served by the unit 10.
- the hot deck and cold deck dampers are constructed in sets so that each served zone has its own set of hot and cold deck dampers for selectively controlling the amounts of treated air to be received from the hot and cold decks to satisfy the demands of that zone. In addition.
- the dampers 24 and 26 are coordinated so that as the hot deck dampers 24 ofa set move toward an open position the cold deck dampers 26 of that set move toward a closed position. and visa versa.
- the hot deck dampers of a set are completely open.
- the cold deck dampers of that set are completely closed. and likewise. when the cold deck dampers are completely open the hot deck dampers are completely closed.
- both the hot deck and cold deck dampers are partially open to a varying extent to allow a coordinated air flow from both the hot deck and cold deck.
- the refrigerant system 14 comprises at least two condensers 28 and 30, a compressor 32, a reheat coil 34 disposed in the hot deck portion 20, and an evaporator coil 36 disposed to cool an air stream flowing to both the hot deck and cold deck 22.
- the refrigerant system 14 further includes parallel refrigerant conduits 38 and 40 connecting the condensers 28 and 30, respectively, to the pressure side of the compressor 32; parallel refrigerant conduits 42 and 44 connecting the con densers 28 and 30, respectively, via a conduit 45 to the reheat coil 34; a refrigerant conduit 46 interconnecting the reheat coil 34 and the evaporator 36; an expansion valve 49 in the conduit 46 between the reheat coil 34 and evaporator 36; and a refrigeration conduit 50 interconnecting the evaporator 36 and suction side of the compressor 32 forming a closed loop refrigeration circuit.
- a re frigerant flow regulating valve 52 may be disposed in either one of the parallel refrigerant conduits 38 or 40. but for the sake of clarity of discussion. it will be assumed to be installed in the conduit 40.
- the valve 52 is actuated by a solenoid 54 to restrict the flow of refrigerant from the condenser 30. While the valve 52 is illustrated as being a two-way valve which is either open to allow unrestricted refrigerant flow or closed to completely block the refrigerant flow through the refrigerant circuit. it instead could be a metering-type valve for modulating the volume rate of flow of refrigerant.
- the refrigerant control system 16 comprises a regulating valve control means. such as a served zone air condition sensor 56 located in each of the served zones.
- Each sensor 56 is operatively connected through. for
- an outdoor air temperature sensor 60 is operatively connected to the system controller 58 to allow a served zone sensor 56 to actuate the valve 52 only when the outdoor air temperature is below a predetermined temperature. ln pratice. this temperature has been determined to be approximately Fahreheit. If the valve 52 where actuated to a flow restricting position when the outdoor air temperature is above 70Fahrenheit, thus, reducing the effective condensing area. the compressor head pressure would increase to a level which could damage the compressor.
- a separate damper actuator 62 is operatively connected to each set of hot and cold deck dampers 24 and 26, and each served zone sensor 56 is operatively connected. through the system controller 58, to the zone 4 actuator 62 operating the dampers controlling the air flow into the zone in which it is disposed.
- FIG. 2 best illustrates the conditions prevailing within the air-conditioning unit 10 when all of the served zone sensors 56 are calling for percent cool air from the unit 10.
- the refrigerant flow regulating valve 52 is open allowing unrestricted refrigerant flow through the refrigerant system 14 under the influence of the compressor 14: all of the hot deck dampers 24 are closed and all of the cold deck dampers 26 are open.
- Refrigerant vapor is conveyed through conduits 38 and 40 from the compressor 32 to the condensers 28 and 30 (see arrows A).
- the refrigerant vapor is essentially completely condensed in the condensers.
- the condensed refrigerant exits the condensers 28 and 30 through conduits 42 and 44 and is conveyed to the reheat coil 34 through conduit 45 (see arrows B).
- the condensed refrigerant exits the reheat coil 34 through the conduit 46 (see arrows C to the evaporator 36 and from the evaporator through conduit 50 back to the compressor 32.
- An air stream to be treated passes in heat exchange relationship through the evaporator 36 whereat it is cooled (see arrow D"). Because in the cooling mode the hot deck dampers 24 are fully closed and the cold deck dampers 26 are fully open. the entire air stream cooled by the evaporator 36 is routed through the cold deck portion 22 (see arrow E") and exits through the open cold deck dampers 26 (see arrow F). to be distributed to the served zones. Because virtually all of the refrigerant has been condensed in the condensers 20 and 22 prior to being conveyed to the reheat coil 34 and because virtually no air is routed through the hot deck portion 20, the reheat coil 34 is redundant in the full cooling mode.
- FIG. 3 illustrates the prevailing conditions within the air-conditioning unit 10 when at least one of the served zone sensors 56 is calling for some amount of heat less than 100 percent of the heat capable of being supplied by the reheat coil 34.
- the served zone sensor 56 calling for the most heat closes the regulating valve 52 restricting refrigerant flow from the condenser 30 to the reheat coil thus, causing the entire volume of refrigerant vapor to flow into the condenser 28 from the compressor 32 (see arrows G).
- the condenser 28 does not have sufficient capacity to condense this amount of vapor refrigerant and, therefore, discharges a mixture of refrigerant vapor and hot refrigerant fluid through conduits 38 and 45 (see arrows H) to the reheat coil 34.
- the re heat coil 34 is forced to function as a condenser to condense the vapor portion of the refrigerant to heat an air stream flowing through the hot deck.
- the now condensed refrigerant passes from the reheat coil 34 through conduit 46 to the evaporator 36 (see arrow l") and from the evaporator through the conduit 50 back to the compressor 32 (see arrow .l). Concurrently.
- the served zone air condition sensor 56 causes the hot deck dampers 24 to partially open and the cold deck dampers 26 to partially close to route a portion of the air stream cooled by evaporator 36 (see arrows K") to flow through the hot deck portion 20 and into heat exchange relationship with the reheat coil (see arrows L") where the air stream is reheated and another portion of the air stream through the cold deck portion 22 (see arrow M).
- the reheated air stream from the hot deck portion and cool air stream from the cold deck exit through the hot and cold deck dampers, respectively, to be mixed downstream of the unit 10 and distributed to the served zone calling for heat.
- the hot deck dampers controlling the air flow from the unit to the served zones which are not calling for heat remain closed and the cold deck dampers remain open.
- FIG. 4 best illustrates the prevailing conditions within the air-conditioning unit 10 when 100 percent reheated air is demanded by at least one of the served zone air condition sensors.
- the flow regulation valve 52 is closed by means of the sensor 56 actuating the solenoid 54, thus, causing all of the refrigerant vapor to flow into the condenser 28 (see arrows N).
- the condenser 28 is incapable of condensing all of the refrigerant vapor and, therefore, discharges a mixture of refrigerant vapor and liquid refrigerant through the conduits 38 and to the reheat coil 34 (see arrows 0) thereby forcing the reheat coil 34 to function as a condenser in place of the blocked condenser 30.
- the now completely condensed refrigerant passes from the reheat coil 34 through the conduit 46 to the evaporator 36 (see arrow P") and from the evaporator through the conduit 50 back to the compressor (see arrow Q).
- the hot deck dampers 24 controlling the air flow to the zones calling for 100 percent reheat are completely opened and the cold deck dampers comletely closed to route all of the air cooled by the evaporator 36 (see arrows R) through the hot deck portion 20 and into heat exchange relationship with the reheat coil 34 (see arrows S).
- the reheated air stream exits the hot deck through the hot deck dampers 24 to be distributed to the served Zone calling for 100 percent reheat.
- the hot deck dampers controlling the air flow from the unit 10 to the served zones which may concurrently be calling for some heat less than 100 percent reheat are partially open and the cold deck dampers are also partially open to route a mixture of hot and cold air to those served zones.
- the hot deck dampers controlling the air flow from the unit 10 to any served zones which are not calling for any heat remain closed and the cold deck deampers remain open.
- the served zone air condition sensor 56 of the present invention which may be either a thermostat or humidistat, is both immediately responsive to the actual air conditions existing within a served zone and is adjustable so that the set point at which the regulator valve 52 is closed can be varied to compensate for varying air conditions actually existing with the served zone at any particular point in time.
- An air-conditioning unit of the reheat-type for supplying conditioned air to at least one served zone.
- said air conditioning unit comprising:
- a reheat coil disposed in said hot deck for selectively reheating the air stream flowing through said hot deck portion
- At least two condensers having their outlets in parallel refrigerant flow communication with the inlet of said reheat coil;
- At least one compressor having its pressure side in refrigerant flow communication with the inlet of said condensers;
- an evaporator disposed upstream of said reheat coil for selectively cooling an air stream flowing into said hot deck portion and said cold deck portion, the inlet of said evaporator being in refrigerant flow communication with the outlet of said reheat coil and the outlet of said evaporator being in refrigerant flow communication with the suction side of said compressor;
- a refrigerant flow regulating valve for controlling the flow of refrigerant between at least one of said condensers and said reheat coil;
- each of said sensors being immediately responsive to the conditions of the air within the served zone for actuating said regulating valve to restrict the flow of refrigerant from one of said condensers to said reheat coil when the served zone air conditions within a served zone deviate from a desired condition.
- said served zone air condition is the served zone air temperature
- said served zone air condition sensor is a thermostat.
- said served zone air condition is the served zone air humidity
- said served zone air condition sensor is a humidistat.
- said hot deck portion routing means comprise movable dampers for selectively controlling the flow of air through said hot deck portion to each served zone;
- said cold deck portion routing means comprise movable dampers for selectively controlling the flow of air through said cold deck portion to each served zone.
- said served zone air condition sensor in each served zone causes said hot deck portion dampers controlling the air flow to that served zone to move between open and closed positions in response to trolling the air flow to that served zone to move beserved zone air conditions; and. tween open and closed positions in response to said served zone air condition sensor in each served served zone air conditions.
Abstract
Description
Claims (7)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US523478A US3921413A (en) | 1974-11-13 | 1974-11-13 | Air conditioning unit with reheat |
CA231,422A CA1016748A (en) | 1974-11-13 | 1975-07-11 | Air conditioning unit with reheat |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US523478A US3921413A (en) | 1974-11-13 | 1974-11-13 | Air conditioning unit with reheat |
Publications (1)
Publication Number | Publication Date |
---|---|
US3921413A true US3921413A (en) | 1975-11-25 |
Family
ID=24085195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US523478A Expired - Lifetime US3921413A (en) | 1974-11-13 | 1974-11-13 | Air conditioning unit with reheat |
Country Status (2)
Country | Link |
---|---|
US (1) | US3921413A (en) |
CA (1) | CA1016748A (en) |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4060913A (en) * | 1976-08-02 | 1977-12-06 | Takasago Thermal Engineering Co., Ltd | Assembly for dehydrating air to be supplied to blast furnace |
US4176525A (en) * | 1977-12-21 | 1979-12-04 | Wylain, Inc. | Combined environmental and refrigeration system |
US5108475A (en) * | 1991-01-28 | 1992-04-28 | Venturedyne, Ltd. | Solvent recovery system with means for reducing input energy |
US5329782A (en) * | 1991-03-08 | 1994-07-19 | Hyde Robert E | Process for dehumidifying air in an air-conditioned environment |
US5509272A (en) * | 1991-03-08 | 1996-04-23 | Hyde; Robert E. | Apparatus for dehumidifying air in an air-conditioned environment with climate control system |
US5689962A (en) * | 1996-05-24 | 1997-11-25 | Store Heat And Produce Energy, Inc. | Heat pump systems and methods incorporating subcoolers for conditioning air |
US6185958B1 (en) | 1999-11-02 | 2001-02-13 | Xdx, Llc | Vapor compression system and method |
US6314747B1 (en) | 1999-01-12 | 2001-11-13 | Xdx, Llc | Vapor compression system and method |
US6393851B1 (en) | 2000-09-14 | 2002-05-28 | Xdx, Llc | Vapor compression system |
US6401471B1 (en) | 2000-09-14 | 2002-06-11 | Xdx, Llc | Expansion device for vapor compression system |
US6581398B2 (en) | 1999-01-12 | 2003-06-24 | Xdx Inc. | Vapor compression system and method |
US6751970B2 (en) | 1999-01-12 | 2004-06-22 | Xdx, Inc. | Vapor compression system and method |
US6857281B2 (en) | 2000-09-14 | 2005-02-22 | Xdx, Llc | Expansion device for vapor compression system |
US6915648B2 (en) | 2000-09-14 | 2005-07-12 | Xdx Inc. | Vapor compression systems, expansion devices, flow-regulating members, and vehicles, and methods for using vapor compression systems |
US20060048529A1 (en) * | 2003-12-22 | 2006-03-09 | Shin Jong M | Refrigerating system for refrigerator |
US7168258B2 (en) * | 2004-01-08 | 2007-01-30 | Al-Khateeb Osama Othman Mostae | Real temperature output air conditioner |
US7225627B2 (en) | 1999-11-02 | 2007-06-05 | Xdx Technology, Llc | Vapor compression system and method for controlling conditions in ambient surroundings |
US7559207B2 (en) | 2005-06-23 | 2009-07-14 | York International Corporation | Method for refrigerant pressure control in refrigeration systems |
US20100229579A1 (en) * | 2004-12-29 | 2010-09-16 | John Terry Knight | Method and apparatus for dehumidification |
US20110126560A1 (en) * | 2008-05-15 | 2011-06-02 | Xdx Innovative Refrigeration, Llc | Surged Vapor Compression Heat Transfer Systems with Reduced Defrost Requirements |
US20110167846A1 (en) * | 2005-06-23 | 2011-07-14 | York International Corporation | Method and system for dehumidification and refrigerant pressure control |
US20110259041A1 (en) * | 2010-04-21 | 2011-10-27 | Whirlpool Corporation | High efficiency condenser |
US10088241B1 (en) * | 2012-05-16 | 2018-10-02 | Engendren Corporation | Multi-mode heat exchange system for sensible and/or latent thermal management |
WO2019173046A1 (en) * | 2018-03-09 | 2019-09-12 | Duncan Scot Matthew | High efficiency dehumidification system (heds) |
FR3082288A1 (en) * | 2018-06-11 | 2019-12-13 | Ventilairsec | VENTILATION DEVICE FOR VENTILATION AND HEATING OR AIR CONDITIONING OF THE INTERIOR SPACE OF A CONSTRUCTION |
EP3581856A1 (en) * | 2018-06-11 | 2019-12-18 | Ventilairsec | Ventilation device for ventilation and heating or air conditioning of the inside space of a building |
US11313600B2 (en) * | 2019-10-07 | 2022-04-26 | Johnson Controls Tyco IP Holdings LLP | Modulating reheat operation of HVAC system with multiple condenser coils |
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US2266029A (en) * | 1935-11-11 | 1941-12-16 | Honeywell Regulator Co | Zone air conditioning system |
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US3631686A (en) * | 1970-07-23 | 1972-01-04 | Itt | Multizone air-conditioning system with reheat |
-
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US2266029A (en) * | 1935-11-11 | 1941-12-16 | Honeywell Regulator Co | Zone air conditioning system |
US2702456A (en) * | 1953-08-31 | 1955-02-22 | Trane Co | Air conditioning system |
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Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4060913A (en) * | 1976-08-02 | 1977-12-06 | Takasago Thermal Engineering Co., Ltd | Assembly for dehydrating air to be supplied to blast furnace |
US4176525A (en) * | 1977-12-21 | 1979-12-04 | Wylain, Inc. | Combined environmental and refrigeration system |
US5108475A (en) * | 1991-01-28 | 1992-04-28 | Venturedyne, Ltd. | Solvent recovery system with means for reducing input energy |
US5329782A (en) * | 1991-03-08 | 1994-07-19 | Hyde Robert E | Process for dehumidifying air in an air-conditioned environment |
US5509272A (en) * | 1991-03-08 | 1996-04-23 | Hyde; Robert E. | Apparatus for dehumidifying air in an air-conditioned environment with climate control system |
US5664425A (en) * | 1991-03-08 | 1997-09-09 | Hyde; Robert E. | Process for dehumidifying air in an air-conditioned environment with climate control system |
US5689962A (en) * | 1996-05-24 | 1997-11-25 | Store Heat And Produce Energy, Inc. | Heat pump systems and methods incorporating subcoolers for conditioning air |
WO1997044625A1 (en) * | 1996-05-24 | 1997-11-27 | Store Heat And Produce Energy, Inc. | Heat pump systems and methods incorporating subcoolers for conditioning air |
US6581398B2 (en) | 1999-01-12 | 2003-06-24 | Xdx Inc. | Vapor compression system and method |
US6314747B1 (en) | 1999-01-12 | 2001-11-13 | Xdx, Llc | Vapor compression system and method |
US6951117B1 (en) | 1999-01-12 | 2005-10-04 | Xdx, Inc. | Vapor compression system and method for controlling conditions in ambient surroundings |
US6397629B2 (en) | 1999-01-12 | 2002-06-04 | Xdx, Llc | Vapor compression system and method |
US6751970B2 (en) | 1999-01-12 | 2004-06-22 | Xdx, Inc. | Vapor compression system and method |
US6644052B1 (en) | 1999-01-12 | 2003-11-11 | Xdx, Llc | Vapor compression system and method |
US7225627B2 (en) | 1999-11-02 | 2007-06-05 | Xdx Technology, Llc | Vapor compression system and method for controlling conditions in ambient surroundings |
US6185958B1 (en) | 1999-11-02 | 2001-02-13 | Xdx, Llc | Vapor compression system and method |
US6401471B1 (en) | 2000-09-14 | 2002-06-11 | Xdx, Llc | Expansion device for vapor compression system |
US6857281B2 (en) | 2000-09-14 | 2005-02-22 | Xdx, Llc | Expansion device for vapor compression system |
US6915648B2 (en) | 2000-09-14 | 2005-07-12 | Xdx Inc. | Vapor compression systems, expansion devices, flow-regulating members, and vehicles, and methods for using vapor compression systems |
US6393851B1 (en) | 2000-09-14 | 2002-05-28 | Xdx, Llc | Vapor compression system |
US6401470B1 (en) | 2000-09-14 | 2002-06-11 | Xdx, Llc | Expansion device for vapor compression system |
US7263849B2 (en) * | 2003-12-22 | 2007-09-04 | Lg Electronics Inc. | Refrigerating system for refrigerator |
US20060048529A1 (en) * | 2003-12-22 | 2006-03-09 | Shin Jong M | Refrigerating system for refrigerator |
US7168258B2 (en) * | 2004-01-08 | 2007-01-30 | Al-Khateeb Osama Othman Mostae | Real temperature output air conditioner |
US20100229579A1 (en) * | 2004-12-29 | 2010-09-16 | John Terry Knight | Method and apparatus for dehumidification |
US7845185B2 (en) | 2004-12-29 | 2010-12-07 | York International Corporation | Method and apparatus for dehumidification |
US7559207B2 (en) | 2005-06-23 | 2009-07-14 | York International Corporation | Method for refrigerant pressure control in refrigeration systems |
US20110167846A1 (en) * | 2005-06-23 | 2011-07-14 | York International Corporation | Method and system for dehumidification and refrigerant pressure control |
US10288334B2 (en) | 2008-05-15 | 2019-05-14 | XDX Global, LLC | Surged vapor compression heat transfer systems with reduced defrost phase separator |
US20110126560A1 (en) * | 2008-05-15 | 2011-06-02 | Xdx Innovative Refrigeration, Llc | Surged Vapor Compression Heat Transfer Systems with Reduced Defrost Requirements |
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