Abstract: A cooling system is provided that combines a two-phase refrigerant pumped loop cooling circuit and a vapor compression loop circuit in a complete electronics cooling package for use in high ambient temperature applications. Specific applications may include, but are not limited to, power electronics converter and inverter drives, and hybrid electric vehicles. In hybrid electric vehicle applications, the primary pumped two-phase refrigerant cooling system is used for providing high-temperature cooling to the inverter drive. The secondary vapor compression system is used to provide low-temperature cooling to the battery module (i.e. such as Li-ion cells) or passenger compartment cooling, thereby eliminating the need for a special cooling solution for the battery module which requires lower temperature cooling.

Abstract: A shut-off valve for pressurized fluids in an air cooling/heating apparatus that includes at least one condenser and at least one fluid evaporator communicating with each other by a pipe. The valve includes two ducts each containing a restrictor coaxially formed with a capillary designed to cause rapid expansion of the fluid when it emerges from the capillary, thus allowing expansion of the fluid in either the heating or cooling mode. The valve further includes a duct for sampling the pressurized fluid before expansion during operation in either the heating or cooling mode.

Abstract: A shut-off valve for pressurized fluids in an air cooling/heating apparatus that includes at least one condenser and at least one fluid evaporator communicating with each other by a pipe. The valve includes two ducts each containing a restrictor coaxially formed with a capillary designed to cause rapid expansion of the fluid when it emerges from the capillary, thus allowing expansion of the fluid in either the heating or cooling mode. The valve further includes a duct for sampling the pressurized fluid before expansion during operation in either the heating or cooling mode.