US 11,654,747 B2
System and method for controlling fluid temperature in a thermal system
Michael A. Smith, Clarkston, MI (US); Eugene V. Gonze, Pinckney, MI (US); and Richard J. Lopez, Bloomfield, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Feb. 7, 2020, as Appl. No. 16/784,799.
Prior Publication US 2021/0245576 A1, Aug. 12, 2021
Int. Cl. B60H 1/00 (2006.01); F01P 3/20 (2006.01); B60H 1/14 (2006.01); B60H 1/03 (2006.01); F01P 7/16 (2006.01); B60H 1/32 (2006.01)
CPC B60H 1/00885 (2013.01) [B60H 1/03 (2013.01); B60H 1/14 (2013.01); F01P 3/20 (2013.01); F01P 7/165 (2013.01); B60H 2001/3267 (2013.01); F01P 2060/04 (2013.01); F01P 2060/045 (2013.01); F01P 2060/08 (2013.01); F01P 2060/12 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A system for controlling fluid temperature in a thermal system, comprising:
a heat source;
a heat sink coupled to the heat source such that a flow of coolant passes between the heat source and the heat sink;
a first heat exchanger coupled to the heat source;
a second heat exchanger coupled to the heat source;
a first expansion valve coupled to the heat source and the first heat exchanger, the first expansion valve configured to regulate the flow of coolant between the heat source and the first heat exchanger;
a second expansion valve coupled to the heat source and the second heat exchanger, the second expansion valve configured to regulate the flow of coolant between the heat source and the second heat exchanger; and
a controller in electronic communication with the heat source, the first expansion valve, and the second expansion valve, the controller configured to determine an operating condition of the thermal system and generate a first control signal to control the first expansion valve to direct the flow of coolant to the first heat exchanger and a second control signal to control the second expansion valve to direct the flow of coolant to the second heat exchanger;
wherein the first and second expansion valves are arranged in parallel to recover heat rejected from the coolant and distribute the recovered heat to the first and second heat exchangers.