Viscous fluid type heat generator with heat-generation performance changing ability

摘要

A viscous fluid type heat generator having a heat generating chamber in which heat generation by the viscous fluid is carried out in response to the rotation of a rotor element applying a shearing action to the viscous fluid, a heat generation control chamber for containing the viscous fluid to be supplied into the heat generating chamber and receiving the viscous fluid withdrawn from the heat generating chamber so that an ability of quickly increasing and decreasing the heat generating performance of the heat generator is achieved in response to a requirement for a change in the supply of heat to be exchanged with a heat exchanging liquid of a heating system. The heat generator has a fluid supplying passage, a fluid withdrawing passage, a fluid supplying recessed groove in the heat generating chamber, and a subsidiary fluid supplying passageway which are arranged so as to provide a fluid communication between the heat generating chamber and the heat generation control chamber. The heat generating performance is quickly reduced by withdrawing the viscous fluid from the heat generating chamber into the heat generation control chamber via the fluid withdrawing passage, and the heat generating performance is quickly increased by supplying the viscous fluid from the heat generation control chamber into the heat generating chamber via the fluid supplying and subsidiary fluid supplying passages.