Medium installation of a vehicle, emptying device for a medium line, and vehicle with the medium installation

A medium installation for a vehicle, the medium installation comprising:

• a medium tank, a medium line fluidically connected to said medium tank, and a feed pump for supplying a medium from the medium tank through said medium line;
• an emptying device for emptying said medium line, said emptying device being connected between said medium tank and said medium line;
• said emptying device having a first connecting line between said medium tank and said medium line to be emptied, and a first non-return valve in said first connecting line to permit a flow of a medium from said medium tank via said emptying device into said medium line and to block a reverse flow;
• said emptying device having a second connecting line which, viewed in a direction of flow of the medium from said medium tank towards said medium line, is fluidically connected to open into said first connecting line downstream of said first non-return valve;
• and
• a pressure medium source being a compressor to be connected to said second connecting line and to pressurize said second connecting line with a gaseous pressure medium and to empty said medium line by the pressure medium;
• said feed pump and said compressor being electrically connected to a DC circuit of the vehicle via a positive pole connection and a ground connection, and a changeover switch being connected in said ground connection of said feed pump and said pressure medium source, said changeover switch being configured to alternately interrupt the ground connection of said feed pump and connect said pressure medium source to said ground connection of the DC circuit or to connect the ground connection of said feed pump and interrupt the ground connection of said pressure medium source to the DC circuit.