Patent ID: 7887307

Claim:
Circulation pump, comprising: an electric motor with a stator, a rotor and a motor circuit; and a housing, in which the electric motor is disposed; wherein: the housing has a first chamber, in which the stator and the rotor are disposed, and a second chamber, which is separate from the first chamber and in which at least one carrier is positioned, on which at least part of the motor circuit is disposed; the first chamber and the second chamber are connected by at least one connection opening, by means of which at least one electrical element of the motor circuit, which is disposed on the at least one carrier, is in thermal contact with the stator in the first chamber; the stator in the first chamber is adapted to be cooled by means of conveyed liquid; the second chamber is adapted to be air-cooled; the at least one carrier has a low-temperature region and a high-temperature region, wherein the low-temperature region is air-cooled and the high-temperature region is cooled by means of the conveyed liquid; an interspace is disposed between the first chamber and the second chamber; said interspace comprising an air gap; and wherein the low temperature region of the least one carrier is directly adjacent the air gap.