| 摘要 |
The present invention relates to a heating device (10, 10') comprising a housing (12) and a rotatably mounted rotor (14) having a rotation axis (t), the housing (12) having a fluid inlet (18) and a fluid outlet (20), a clearance space (16) being provided between the rotor (14) and the housing (12) for allowing fluid communication, the surface of the rotor (14) being provided with recesses for generating cavitation, wherein the recesses are formed with varying size along a spiral path (44), in particular with periodically increasing and decreasing size. The invention further relates to fluid circulation type heating apparatus (60) having a primary circuit (62) and a secondary circuit (64), and having a heat exchanger (66) between the primary circuit (62) and the secondary circuit (64), wherein the primary circuit (62) comprises a heating device (10, 10') according to any of claims 1 to 10. |
