Patent ID: 6047666
Filing Date: 2000-04-11
Classification: F24V

Abstract:
A heat generator comprising:a heating chamber, which includes an inner wall and accommodates viscous fluid;a rotor located in the heating chamber, wherein the rotor has a working surface facing the inner wall of the heating chamber and is rotated for shearing the viscous fluid in a clearance between the inner wall and the working surface thereby generating heat, and wherein the inner wall includes a center region, which is located in the vicinity of the axis of the rotor, and a peripheral region, which surrounds the center region;a heat exchange chamber located adjacent to the heating chamber, wherein heat generated in the heating chamber is transferred to the heat exchange chamber and heats circulating fluid in the heat exchange chamber; anda plurality of grooves formed in the inner wall, wherein the grooves extend from the peripheral region to the center region, and wherein the cross-section of each groove is U-shaped without sharp corners.