Patent ID: 9386729
Filing Date: 2016-07-05
CPC Classification: E21B,H05K

Claim Text:
1. An energy conversion device for an electric driving system of an underwater compression and pumping station, comprising a power module, a cooling system for cooling the power module, and a sealed enclosure housing the power module and at least part of the cooling system and partially filled with a gas or a liquid, the cooling system including: a cooling circuit, in which coolant circulates, a first heat exchanger configured to exchange heat with the power module, through which the coolant passes, and at least one pump configured to circulate the coolant in the cooling circuit, wherein the cooling circuit comprises a pressure regulating valve, extending between a first branch line connected to an outlet of the at least one pump and an inlet branch of the first heat exchanger, and a second branch line connected to an inlet of the at least one pump, the pressure regulating valve is configured to open only when the pressure at the outlet of the at least one pump is greater than the pressure at the inlet of the at least one pump, and to receive a portion of the coolant from the outlet of the at least one pump to vary the coolant flow to the first heat exchanger.