The utility model relates to a
contact type heat dissipation device and a
motor system.The
contact type heat dissipation device comprises a gasification jacket, an exhaust chamber, a
vacuum pump, a liquid pump, a
liquid storage chamber, a
nozzle, a temperature sensor, a controller and a plurality of connecting pipelines, the gasification jacket is arranged on the
peripheral side of a
stator winding shell in a sleeving mode, and the
nozzle is arranged on the side wall of the gasification jacket; the temperature sensor is arranged on the surface of the
stator winding shell; when the temperature sensor detects that the temperature of the
stator winding shell is greater than or equal to a first preset temperature value, the controller controls the liquid pump to pump a
refrigerant into the
nozzle from the
liquid storage chamber, and the
refrigerant is sprayed on the surface of the stator winding shell through the nozzle; the
vacuum pump communicates with the gasification jacket through the exhaust chamber, and the controller controls the
vacuum pump to
discharge the gaseous
refrigerant in the exhaust chamber to the external space. According to the
contact type heat dissipation device and the
motor system provided by the invention, the problem of low heat dissipation efficiency of a liquid cooling plate contact type heat dissipation or
air cooling heat dissipation mode is solved.