VALVE PUMP UNIT

The invention relates to a valve pump unit (VPE) comprising a single electric motor (EM) for driving at least one pump stage (PS1) and for adjusting a multi-port valve (MWV), a reduction gearbox (RG) that can be driven by the electric motor (EM), at least one first pump stage (PS1) that can be driven by the electric motor (EM) for conveying a heat transfer medium in a first heat transfer medium circuit, a multi-port valve (MWV) that can be adjusted via the reduction gearbox (G) and having heat transfer medium channels (6) for providing at least two switch positions between the first heat transfer medium circuit and a second heat transfer medium circuit of a heat transfer medium system, as well as a common housing section (Gg) for accommodating the electric motor (EM), the multi-port valve (MWV), the reduction gearbox (RG) and the pump stage (PS1). In a pump operation, in a first rotational direction of the electric motor (EM), the reduction gearbox (RG) is decoupled from the electric motor (EM) via a freewheel (FL). In a second rotational direction of the electric motor (EM), opposite the pump operation, the reduction gearbox (RG) can be operated to adjust the multi-port valve (MWV).