Stoves and furnaces – Heaters – Frictional
Patent
1997-04-23
2000-07-18
Price, Carl D.
Stoves and furnaces
Heaters
Frictional
122 26, F24C 900
Patent
active
060892226
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a viscous heater in which a viscous fluid is caused to generate heat by shearing. The resulting heat is utilized as a thermal source for heating by carrying out heat exchange with a circulating fluid which circulates in a radiator chamber.
BACKGROUND ART
Conventionally, in Japanese Unexamined Patent Publication (KOKAI) No. 2-246,823, a viscous heater is disclosed which is utilized as a heating apparatus for a vehicle. In this viscous heater, a front housing and a rear housing are disposed so as to face with each other, and are fastened by through bolts, thereby forming a heat-generating chamber and a water jacket therein. The water jacket is disposed around an outer region of the heat-generating chamber. In the water jacket, circulating water is circulated so that it is taken in through a water inlet port, and that it is delivered out to an external heating circuit through a water outlet port. In the front housing, a driving shaft is held rotatably via a bearing apparatus. To the driving shaft, a rotor is fixed so that it can rotate in the heat-generating chamber. A wall surface of the heat-generating chamber and an outer surface of the rotor constitute labyrinth grooves which approach to each other. In a space between the wall surface of the heat-generating chamber and the outer surface of the rotor, a viscous fluid, such as a silicone oil, is interposed.
In the viscous heater built into a vehicle heating apparatus, the rotor rotates in the heat-generating chamber when the driving shaft is driven by an engine. Accordingly, the viscous fluid is caused to generate heat by shearing in the space between the wall surface of the heat-generating chamber and the outer surface of the rotor. The thus generated heat is heat-exchanged to the circulating water in the water jacket. The heated circulating water is used at the heating circuit to heat a vehicle.
Moreover, in Japanese Unexamined Utility Model Publication (KOKAI) No. 4-11,716, a viscous heater is disclosed in which fins are projected into a water jacket. In this viscous heater, heat exchange can be carried out with a relatively high efficiency, because the fins enlarge a surface area of a wall surface constituting the water jacket.
However, in the viscous heater set forth in Japanese Unexamined Patent Publication (KOKAI) No. 2-246,823, heat exchange cannot necessarily be carried out fully, because the surface area of the wall surface constituting the water jacket is relatively small, and because there is a fear of short-circuiting or retaining the circulating water in the water jacket.
Likewise, in the viscous heater set forth in Japanese Unexamined Utility Model Publication (KOKAI) No. 4-11,716, heat exchange cannot necessarily be carried out fully, because there is a fear of short-circuiting or retaining the circulating water in the water jacket.
It is therefore an assignment to the present invention to provide a viscous heater which can carry out full heat exchange securely.
Measures for Solving the Assignment
A viscous heater in accordance with the invention comprises: formed, the radiator chamber neighboring the heat-generating chamber and circulating a circulating fluid therein; apparatus; shaft; and heat-generating chamber and an outer surface of the rotor, and caused to generate heat by the rotating rotor; chamber to enlarge a surface area of a wall surface constituting the radiator chamber and to circulate the circulating fluid, taken in through a first port and delivered out to an external heating circuit through a second port, along a specific route.
In the viscous heater set forth in claim 1, the fin projects into the radiator chamber not only to enlarge a surface area of a wall surface constituting the radiator chamber, but also to circulate the circulating fluid, taken in through a first port, along a specific route in the radiator chamber and to deliver the circulating fluid out to an external heating circuit through a second port. Thus, there is no fear of short-circuiting or retaining
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Ban Takashi
Mori Hidefumi
Yagi Kiyoshi
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Price Carl D.
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