Enclosed separator unit for a gas supply of a fuel cell system

1. An enclosed separator unit for separating liquid from a gas supply device of a fuel cell system, said separator unit comprising:

a separator for separating the liquid;

a housing which encloses the separator, with the separator being arranged in a gas space in the housing and/or being in thermal contact with said gas space;

a line system for draining the liquid away from the separator;

at least one fluid dynamically active functional component arranged in the line system, in the gas space; and

a heating device incorporated into the housing;

wherein, the heating device comprises at least one of i) a portion of a cooling water circuit of the fuel cell system and ii) an electrical heating device,

wherein the housing includes an inlet coupled to an outlet of an anode of the fuel cell system, an outlet coupled to an inlet of the anode of the fuel cell system, and a purge outlet,

wherein a line passes from the separator to the housing outlet and a purge line branches off from the line and connects to the purge outlet, and

wherein the purge line is arranged in the housing in such a manner as to introduce thermal energy into the housing.

2. The separator unit according to claim 1 , wherein the functional component comprises at least one of a drain valve and a drain filter.

3. The separator unit according to claim 1 , wherein the heating device comprises a portion of an anode gas supply device of said fuel cell system.

4. The separator unit according to claim 1 , further comprising at least one additional fluid dynamically active functional component, which is incorporated into at least one of the housing and the gas space.

5. The separator unit according to claim 4 , wherein, the additional functional component comprises a constituent part of an anode gas supply device.

6. The separator unit according to claim 4 , wherein the additional functional component comprises at least one of a purge valve and a purge filter.

7. The separator unit according to claim 1 , wherein the heating device is disposed for direct heating of the purge branch line.

8. The separator unit according to claim 4 , wherein at least one of the functional component and the at least one additional functional component is arranged in at least one of the housing and the gas space, whereby wherein, in an installed but idle state, liquid in an intake to the functional components flows back into at least one of the separator and the gas supply device.

9. The separator unit according to claim 8 , wherein liquid-conveying surfaces of the functional components are provided with at least one of a water-repellent and a hydrophobic coating.