Delphi Technologies, Inc.

Mahle International Gmbh

Lindsey Lee Leitzel

Prasad Shripad Kadle

Mingyu Wang

Scott Edward Kent

Edward Wolfe, Iv

Wayne Oliver Forrest

Frederick Vincent Oddi

John F O'Brien

Yanping Xia

Lawrence P Scherer

Timothy D Craig

Robert Louis Runk

Scott B Lipa

Robert Michael Runk

Carrie M Kowsky

Nicholas Joseph Alonge, Jr

Dennis Lee Farley

Szymon Walczak

Paul J Bruski

Frank A Krueger

Gary S Vreeland

Frederick V Oddi

A heat exchanger for use in an outdoor environment with a heat pump system is provided. The heat exchanger includes a first set of tubes arranged in a parallel flow manner between a first manifold and a second manifold, wherein central straight portions of adjacent tubes are disposed with a space therebetween along each tube of the first set of tube between the first and second manifolds. A second set of tubes are arranged in a parallel flow manner between a third manifold and a fourth manifold, wherein central straight portions of adjacent tubes within the second set of tubes are at least partially disposed within the space between adjacent tubes of the first set of tubes. A fluid that flows through the first set of tubes additionally flows through the second set of tubes before the fluid returns to again flow through the first set of tubes.

Dual heat exchanger for heat pump system

Disclosed is a unitary heat pump air conditioner (HPAC) system having a refrigerant diversion loop configured to supply sufficient heat to defrost an external heat exchanger while not materially affecting the supply of heat to the passenger compartment of a vehicle. The HPAC system includes a refrigerant loop configured to pump heat from a cold coolant loop that scavenges heat from the external heat exchanger to a hot coolant loop that supplies heat to the passenger compartment. The refrigerant loop includes a condenser in thermal communication with the hot coolant loop, evaporator in thermal communication with the cold coolant loop, and a compressor to cycle the refrigerant through the refrigerant loop. The refrigerant loop further includes means to selectively divert at least a portion of the hot compressed refrigerant exiting the compressor directly to the evaporator to heat the cold coolant loop sufficient to defrost the external heat exchanger.

Unitary heat pump air conditioner having a compressed vapor diversion loop

A heat pump cooling and heating system for an electric vehicle includes a range extending PCM heat exchanger (), with a single acting phase change material with a melt temperature between the two comfort temperatures associated with cooling and heating, respectively. In a charging mode, as the vehicle batteries are charged, the same exterior current source runs the compressor (), charging the PCM exchanger () with heat or 'cold.' During an initial range extending mode, the PCM exchanger/reservoir () serves as the heat source or heat sink. The PCM material does not directly heat or cool the air, as is conventional, allowing a single reservoir material to be used in both heating and cooling modes.

HVAC system for electric vehicle with driving range extension

An improved control method for a vehicle air conditioning system including a refrigerant compressor and a condenser cooling fan adjusts the power consumption of the condenser cooling fan in a manner to minimize the combined power consumption of compressor and the condenser cooling fan while maintaining adequate cooling of the condensed refrigerant. When the air conditioning system is operating at less than full capacity, the combined power consumption of the compressor and the condenser cooling fan is determined for each of a series of operating intervals. The change in the combined power consumption from one operating interval to the next is computed to determine the effect of a prior cooling fan power adjustment, and the power level of the cooling fan is incrementally adjusted in the same direction as the prior adjustment so long as the prior adjustment resulted in at least a specified reduction of the combined power consumption. Otherwise, the power level of the cooling fan is incrementally adjusted in the opposite direction so that the control continually seeks the cooling fan power level that will minimize the combined power consumption of the compressor and condenser cooling fan.

Cooling fan control method for minimizing the power consumption of a vehicle air conditioning system

An assembly is provided to increase the efficiency of a vehicle engine cooling and supplementary, heat pump type cabin heating system. A flexible panel located in front of and below the front end heat exchanger can be moved between open and blocking positions. An engine cooling radiator and fan are located behind the front end heat exchanger. In cold weather heating mode, the flexible panel can be rolled to the blocking position, preventing the direct flow of cold outside ram air through the front end heat exchanger. At the same time, the fan is reversed, flowing heated air from the radiator through the front end heat exchanger, improving its efficiency.

Vehicle front end air control

An improved system and method for suppressing high side pressure transients in a motor vehicle air conditioning system due to engine speed transients during vehicle acceleration through the use of a throttling valve. The throttling valve may be mechanically or electrically activated, and is connected in the low pressure side of the air conditioning system to controllably restrict refrigerant flow in response to one or more parameters that detect or anticipate a high side transient pressure condition. The parameters may include the high side pressure itself, or engine parameters such as engine speed and vehicle speed. In a preferred embodiment, the throttling valve may be controlled to prevent evaporator icing in addition to suppressing high side pressure transients.

Control system and method for suppressing head pressure spikes in a vehicle air conditioning system

Growing community of inventors

Lockport, NY, United States of America

Lindsey Lee Leitzel