Patents by Inventor Prasad S. Kadle

Prasad S. Kadle has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120272679
    Abstract: An evaporator having a manifold and a plurality of refrigerant tubes extending downward in the direction of gravity from the manifold. The evaporator includes at least one PCM housing engaging the upper portion of the refrigerant tube for storing a phase change material. When operating in a first operating mode, heat is transferred from the phase change material to the refrigerant to freeze and cool the phase change material. When operating in a second operating mode, heat is transferred from the refrigerant to the frozen phase change material to condense the refrigerant. The condensed refrigerant falls downwardly through the tubes and receives heat from a flow of air to cool the air and evaporate the refrigerant. The evaporated refrigerant rises upwardly back to the low pressure of the cold manifold.
    Type: Application
    Filed: April 20, 2012
    Publication date: November 1, 2012
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: GARY SCOTT VREELAND, EDWARD WOLFE, IV, SCOTT B. LIPA, PRASAD S. KADLE
  • Publication number: 20120276831
    Abstract: A heating, ventilation, and air conditioning (HVAC) system and a method of controlling a HVAC system that is configured to provide a perceived comfortable ambient environment to an occupant seated in a vehicle cabin. The system includes a nozzle configured to direct an air stream from the HVAC system to the location of a thermally sensitive portion of the body of the occupant. The system also includes a controller configured to determine an air stream temperature and an air stream flow rate necessary to establish the desired heat supply rate for the sensitive portion and provide a comfortable thermal environment by thermally isolating the occupant from the ambient vehicle cabin temperature. The system may include a sensor to determine the location of the sensitive portion. The nozzle may include a thermoelectric device to heat or cool the air stream.
    Type: Application
    Filed: April 10, 2012
    Publication date: November 1, 2012
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: MINGYU WANG, PRASAD S. KADLE, DEBASHIS GHOSH, MARK J. ZIMA, EDWARD WOLFE, IV, TIMOTHY D. CRAIG
  • Publication number: 20120222846
    Abstract: The disclosure relates to a unitary heat pump air conditioner (Unitary HPAC) having a plate type hot-side heat exchanger assembly, a cold-side heat exchanger assembly, and electrically driven compressors and coolant pumps. The plate type hot-side heat exchanger assembly includes a plurality of plates stacked and hermetically sealed between an upstream end plate and a downstream end plate, defining a condenser/chiller portion having a first coolant passageway, a sub-cooler portion having a second coolant passageway, and a refrigerant receiver portion sandwiched between the condenser/chiller portion and the sub-cooler portion. The first coolant passageway and the second coolant passageway are in non-contact thermal communication with the refrigerant passageway.
    Type: Application
    Filed: April 20, 2012
    Publication date: September 6, 2012
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: PRASAD S. KADLE, GARY S. VREELAND, FREDERICK V. ODDI
  • Publication number: 20120216562
    Abstract: The disclosure relates to a unitary heat pump air conditioner (Unitary HPAC) having a plate type exchanger assembly, an electrically driven compressor, and coolant pumps. The plate heat exchanger assembly includes a plurality of plates stacked and hermetically sealed between an upstream end plate and a downstream end plate. The stacked plates define a condenser/chiller portion adjacent the upstream end plate, an accumulator portion adjacent the downstream end plate, and an evaporator/chiller portion sandwiched between the condenser/chiller portion and the accumulator portion. A refrigerant passageway extends through the plate type heat exchanger assembly, a hot coolant passageway extends through the condenser/chiller portion, and a cold coolant passageway extends through the evaporator/chiller portion. The cold coolant passageway and the hot coolant passageway are in non-contact thermal communication with the refrigerant passageway.
    Type: Application
    Filed: April 23, 2012
    Publication date: August 30, 2012
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: PRASAD S. KADLE, GARY S. VREELAND, FREDERICK V. ODDI
  • Patent number: 8196646
    Abstract: A heat exchanger assembly including a first and second heat exchangers disposed in sandwiched relationship with one another. The tubes and air fins of the first and second heat exchangers are aligned with one another in a transverse air flow direction. A plurality of middle connecting portions are integral with and extend in the transverse air flow direction between the aligned first and second air fins of the two heat exchangers. Each of the middle connecting portions has a slot for impeding heat conduction between the first and second air fins, and each of the slots in the middle connecting portions is disposed closer to the first tubes than to the second tubes to maximize the effective length of the second air fin.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: June 12, 2012
    Assignee: Delphi Technologies, Inc.
    Inventors: Lin-Jie Huang, Prasad S. Kadle
  • Publication number: 20120055195
    Abstract: An internal heat exchanger assembly for an air conditioning system, having a substantial cylindrical cavity in which a helical coil tube is coaxially disposed within the cylindrical cavity. A bleed valve assembly is incorporated into the helical coiled tube, in which the bleed valve assembly is adapted to open at a predetermined differential pressure between the high pressure side and low pressure side of the internal heat exchanger. The bleed valve selectively bleeds refrigerant from the high pressure side to the low pressure side, thereby increasing the pressure and mass flow rate of the refrigerant to the suction side of a compressor to reduce or eliminate compressor rattle.
    Type: Application
    Filed: October 29, 2009
    Publication date: March 8, 2012
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Edward Wolfe, IV, Prasad S. Kadle, Carrie M. Kowsky, James A. Bright, Timothy D. Craig, Gregory J. Kowalski, Mark J. Zima, Nick G. Sabha
  • Publication number: 20110284195
    Abstract: An evaporator assembly having a first header, a second header, at least two banks of evaporator tubes extending therebetween and in hydraulic communication with the first and second headers. At least one of the evaporator tube may be folded from a unitary strip clad aluminum folded having a thickness (t). The evaporator tube includes a height (h) which is measured from the bottom exterior surface to the top exterior surface, and a corner radius (rc) defined by the transition radius from the flange segments to the channel walls. The bottom wall includes a width (2w), the corrugated portion includes alternating flange segments abutting the interior surface and channel walls connecting the alternating flange segments, at least one of the alternating adjacent flange segments includes a length (a) cooperating with adjacent the channel walls to define a channel having a width (b). The evaporator tube also includes a number of ports per millimeter width (PPMW) in a range of 0.40 to 1.
    Type: Application
    Filed: May 13, 2011
    Publication date: November 24, 2011
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: SOURAV CHOWDHURY, PRASAD S. KADLE
  • Publication number: 20110277541
    Abstract: A refrigerant leak detection system is provided for a motor vehicle, in which the system includes a heating, ventilating, and air conditioning (HVAC) module having a refrigerant sensor assembly adapted to be fixed within the drain hole of the sump. The refrigerant sensor assembly includes an elongated sensor element extending into the sump, a flange portion having apertures that allows the condensate to drain from sump, a collar portion with self-tapping threads.
    Type: Application
    Filed: November 25, 2009
    Publication date: November 17, 2011
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Prasad S. Kadle, Mahmoud Ghodbane
  • Patent number: 8051906
    Abstract: The assembly includes a pair of heat exchangers, each including an upper and lower manifold, parallel and spaced relative to one another. Tubes extend between each set of upper and lower manifolds with fins disposed between each of the tubes. A valve system controls fluid flow between the upper manifolds and the lower manifolds. The valve system is movable between a maximum cooling mode with fluid flow form the first upper manifold through both of the tubes and to said first lower manifold. A temperate mode allows fluid to flow from the first upper manifold to the first lower manifold and from the second upper manifold to the second lower manifold to prevent flash fogging. A maximum cooling mode allows fluid to flow from the second upper manifold through both of the first and second tubes to the lower manifolds.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: November 8, 2011
    Assignee: Delphi Technologies, Inc.
    Inventors: Edward Wolfe, IV, Gregory J. Kowalski, Prasad S. Kadle, John F. O'Brien
  • Patent number: 7886552
    Abstract: A control methodology for dynamically adjusting the switching limits of a cycled refrigerant compressor in an air conditioning system with the objective of achieving an optimal or specified tradeoff between compressor cycling frequency and discharge air temperature variation under all operating conditions. In a first embodiment, the compressor cycling limits are controlled to maintain a virtually constant discharge air temperature variation for all operating conditions. In a second embodiment, the compressor cycling limits are controlled so that the discharge air temperature variation changes in relation to the discharge air temperature to provide a virtually constant human comfort level for the occupants. And in a third embodiment, the compressor cycling limits are controlled so that the discharge air temperature variation changes in relation to the ambient or outside air temperature to provide a virtually constant human comfort level for the occupants.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: February 15, 2011
    Assignee: Delphi Technologies, Inc.
    Inventors: Mingyu Wang, Prasad S. Kadle, Mark J. Zima
  • Publication number: 20100313587
    Abstract: An air conditioning system including an evaporator having a manifold and a plurality of tubes extending downward in a vertical direction from the manifold. The evaporator defines at least one PCM tank engaging the manifold for storing a phase change material. When operating in a first operating mode, heat is transferred from the phase change material to the refrigerant to freeze and cool the phase change material. When operating in a second operating mode, heat is transferred from the refrigerant to the frozen phase change material to condense the refrigerant. The condensed refrigerant falls downwardly through the tubes and receives heat from a flow of air to cool the air and evaporate the refrigerant. The evaporated refrigerant rises upwardly back to the low pressure of the cold manifold.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 16, 2010
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Edward Wolfe, IV, Ilya Reyzin, Prasad S. Kadle, James A. Bright
  • Publication number: 20100242510
    Abstract: A vehicle air conditioner system having, and method of operating, an externally controlled variable displacement compressor and a compressor clutch. If the system is operating during conditions when the operating displacement is low, the efficiency of the system is increased by duty cycling the clutch. Operating an externally controlled variable displacement compressor in this manner can also prevent overcooling by the air conditioner.
    Type: Application
    Filed: December 9, 2009
    Publication date: September 30, 2010
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Prasad S. Kadle, Mark J. Zima, Joseph M. Bona
  • Publication number: 20100146953
    Abstract: A cylindrical stainless steel housing includes an exhaust inlet collar and exhaust outlet collar allowing exhaust gas to travel therethrough at a mean flow velocity in accordance with a velocity formula. A plurality of stainless steel tubes extend through the housing from a steam inlet manifold to a steam outlet manifold. A number and size of the tubes is determined by formulas and dependent on an Euler number, a Reynolds number, a number of transfer units, a Prandtl number, a porosity factor and a system efficiency. The tubes may comprise an S-shape or a U-shape. The tube walls have a thickness determined according to wall thickness formulas and the walls include a plurality of cavities on an interior surface of each tube wall. The cavities may comprise a conical or semi-spherical shape and have a diameter determined according to formulas.
    Type: Application
    Filed: December 12, 2008
    Publication date: June 17, 2010
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Mohinder S. Bhatti, Mark J. Zima, Prasad S. Kadle
  • Publication number: 20100147498
    Abstract: A heat exchanger assembly including a first and second heat exchangers disposed in sandwiched relationship with one another. The tubes and air fins of the first and second heat exchangers are aligned with one another in a transverse air flow direction. A plurality of middle connecting portions are integral with and extend in the transverse air flow direction between the aligned first and second air fins of the two heat exchangers. Each of the middle connecting portions has a slot for impeding heat conduction between the first and second air fins, and each of the slots in the middle connecting portions is disposed closer to the first tubes than to the second tubes to maximize the effective length of the second air fin.
    Type: Application
    Filed: December 15, 2008
    Publication date: June 17, 2010
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Lin-Jie Huang, Prasad S. Kadle
  • Publication number: 20100122793
    Abstract: The assembly includes a pair of heat exchangers, each including an upper and lower manifold, parallel and spaced relative to one another. Tubes extend between each set of upper and lower manifolds with fins disposed between each of the tubes. A valve system controls fluid flow between the upper manifolds and the lower manifolds. The valve system is movable between a maximum cooling mode with fluid flow form the first upper manifold through both of the tubes and to said first lower manifold. A temperate mode allows fluid to flow from the first upper manifold to the first lower manifold and from the second upper manifold to the second lower manifold to prevent flash fogging. A maximum cooling mode allows fluid to flow from the second upper manifold through both of the first and second tubes to the lower manifolds.
    Type: Application
    Filed: November 20, 2008
    Publication date: May 20, 2010
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Edward Wolfe, IV, Gregory J. Kowalski, Prasad S. Kadle, John F. O'Brien
  • Publication number: 20100001086
    Abstract: A method for heating ambient air for a passenger compartment of a motor vehicle is disclosed herein. The method includes the step of positioning a first heat exchanger proximate to a passenger compartment of a vehicle. The method also includes the step of passing ambient air for the passenger compartment through a first heat exchanger. The method also includes the step of concurrently directing distinct flows of engine coolant and steam to the first heat exchanger to heat the ambient air.
    Type: Application
    Filed: July 7, 2008
    Publication date: January 7, 2010
    Inventors: Mohinder S. Bhatti, Mark J. Zima, Prasad S. Kadle
  • Publication number: 20090260374
    Abstract: A control methodology for dynamically adjusting the switching limits of a cycled refrigerant compressor in an air conditioning system with the objective of achieving an optimal or specified tradeoff between compressor cycling frequency and discharge air temperature variation under all operating conditions. In a first embodiment, the compressor cycling limits are controlled to maintain a virtually constant discharge air temperature variation for all operating conditions. In a second embodiment, the compressor cycling limits are controlled so that the discharge air temperature variation changes in relation to the discharge air temperature to provide a virtually constant human comfort level for the occupants. And in a third embodiment, the compressor cycling limits are controlled so that the discharge air temperature variation changes in relation to the ambient or outside air temperature to provide a virtually constant human comfort level for the occupants.
    Type: Application
    Filed: April 17, 2008
    Publication date: October 22, 2009
    Inventors: Mingyu Wang, Prasad S. Kadle, Mark J. Zima
  • Publication number: 20080289347
    Abstract: A high efficiency air conditioning system includes a pneumatically-controlled variable displacement compressor and a compressor clutch that is selectively cycled on and off to minimize series re-heating of conditioned air. Conditioned air is discharged after passing through an evaporator core, and a target value for the evaporator outlet air temperature is determined based on the desired air discharge temperature. The compressor clutch is cycled off when the evaporator outlet air temperature falls below the target value by at least a calibrated amount, and is thereafter cycled on again when the evaporator outlet air temperature rises above the target value. The target value is preferably biased to prevent compressor operation when the desired air discharge temperature exceeds outside air temperature by at least a calibrated amount and to prevent the relative humidity in the air-conditioned space from rising above a desired level.
    Type: Application
    Filed: May 22, 2007
    Publication date: November 27, 2008
    Inventors: Prasad S. Kadle, Mark J. Zima
  • Publication number: 20070157631
    Abstract: Conditioned air discharged from a vehicle heating, ventilation and air conditioning (HVAC) unit is further conditioned by a thermoelectric (TE) air temperature control module and then directed to air passages in a vehicle seat. Activation of the TE air temperature control module is based on climate control parameters utilized by the HVAC unit, including the set temperature and the cabin air temperature.
    Type: Application
    Filed: January 4, 2007
    Publication date: July 12, 2007
    Inventors: Lin Jie Huang, Edward I. Wolfe, Prasad S. Kadle, Xiaoxia Mu
  • Patent number: 7036329
    Abstract: In order to reduce refrigerant leakage from an automotive air conditioning system, the leakage paths are kept sealed by automatically reducing the output of a variable displacement compressor (12) after initial operation of the engine for a predetermined number of five minutes, and then only for a predetermined number of ten seconds, that is, so long as there has been an air conditioning on signal by the operator. After the reduction in output for ten seconds, the output of the compressor (12) is returned to full output for a predetermined number of two air-conditioning minutes, which is then followed by another ten seconds of reduced output.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: May 2, 2006
    Assignee: Delphi Technologies, Inc.
    Inventors: S. Umair Ahmed, Edward I. Wolfe, IV, Prasad S. Kadle, William J. Kumpf