Device for separating oil drops in a mixture of gas and oil and a separation method implementing such a separator device

A separator device, for separating oil drops from a mixture comprising gas and oil drops and coming from an internal combustion engine, the separator device comprising at least:

• a separation chamber having i) an inlet configured for the entry of the mixture into the separation chamber, and ii) an outlet arranged for the exit of the gas out of the separation chamber,
• an oil recovery chamber coupled to the separation chamber via at least one bleed port, so that the liquid oil can flow from the separation chamber to the oil recovery chamber through said at least one bleed port,
• at least one emitter electrode extending at least partially into the separation chamber configured to generate at least one electric field suitable to negatively charge oil drops,
• at least one collector electrode extending at least partially into the separation chamber configured to collect negatively-charged oil drops, and
• an electronic unit connected to said at least one emitter electrode and to said at least one collector electrode, in order to:
• at least during a charging phase
• bring said at least one emitter electrode to a negative potential by its connection to the said at least one emitter electrode and,
• bring said at least one collector electrode to a zero or positive potential by its connection to the said at least one collector electrode, so that said at least one collector electrode collects negatively-charged oil drops,
• wherein the separator device further comprises at least one pressure-drop generating member disposed in the separation chamber so as to delimit therein an upstream portion and a downstream portion, the pressure-drop generating member being configured so as to generate pressure drops between the upstream portion and the downstream portion when gas flows between the inlet and the outlet, and the oil recovery chamber is coupled to the downstream portion via at least one vacuuming port, so that pressure into the oil recovery chamber is lower than pressure into the upstream portion.