VISCOUS HEATER

摘要

A viscous heater which can increase the amount of generated heat without any special means of enlarging the heat generating effective region. A heater housing is made up of an intermediate housing (1), a cylindrical stator member (2), a front housing (5) and a rear housing (6). The heater housing defines therein a heat generating chamber (7) and a heat radiating chamber (water jacket) (8) around the heat generating chamber. Front and rear drive shafts (12A), (12B) and a rotor (20) are disposed in the heat generating chamber (7) to be rotatable together, while silicone oil as a viscous fluid is also sealed in the heat generating chamber (7). A plurality of grooves (31, 32) extending in the axial direction of the rotor are formed respectively on an outer circumferential surface of the rotor (20) and an inner circumferential surface of the stator member (2), the grooves serving as shearing force increasing means.