Electric heating – Inductive heating – With heat exchange
Reexamination Certificate
1999-04-09
2001-10-02
Hoang, Tu Ba (Department: 3742)
Electric heating
Inductive heating
With heat exchange
C219S628000
Reexamination Certificate
active
06297484
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a magnetic heater for use as auxiliary heating means of heat transferring fluid such as engine cooling water used for improving the starting performance of various vehicular engines of cars in particular whose power source is a diesel engine or a gasoline engine and for heating a cabin of various vehicles including electric cars and ships when the weather is cold or is extremely cold and for use in a generator driven by an engine, a welding machine, a compressor, a unit for preheating or quickly heating engine cooling water of construction machines (to shorten warming up time), a unit for forced-feeding hot water while heating, a heater of an air conditioner and a dryer such as a hair dryer.
2. Description of the Related Art
There has been known a viscous type heater as a vehicular auxiliary heating source of a car and the like used for heating engine cooling water in starting the car in a cold district (see JP-A-2-246823, JP-A-4-11716U, JP-A-9-254637, JP-A-966729, JP-A-9-323530 and others).
The viscous type heater is a system which causes viscous fluid such as silicon oil to generate heat by shearing and utilizes the heat as a heating source by heat-exchanging it with circulating water circulating within a water jacket. It comprises an exothermic chamber within a housing, the water jacket formed on the outside of the exothermic chamber, a driving shaft rotably supported by the housing via a bearing and a rotor which is turnable within the exothermic chamber and which is fixed to the driving shaft. The viscous fluid such as the silicon oil is filled in a gap between the wall face of the exothermic chamber and the rotor. The circulating water circulates within the water jacket so that it is taken in from a water inlet port and is sent out to an external heating circuit from a water outlet port.
When the driving shaft is driven by an engine, the rotor rotates within the exothermic chamber in the viscous type heater incorporated in a heating system of a vehicle. Then, the viscous fluid generates heat by being sheared at the gap between the wall face of the exothermic chamber and the outer face of the rotor. This heat is heat-exchanged with the circulating water within the water jacket and the heated circulating water is utilized to heat the vehicle such as the engine cooling water.
However, although the viscous type heater described above has had advantages that its simple structure allows the miniaturization and the low cost to be realized, its non-wearing and non-contact mechanism allows high reliability and safety to be maintained and it uses no wasteful energy because its operation stops automatically by temperature control when the water temperature rises and the auxiliary heater is not required, it has had problems that the temperature of the silicon oil used as the viscous fluid cannot be so high because the heat resistance of the silicon oil is around 240° C., it takes time until when the silicon oil generates high temperature heat after being agitated at the start and the heating effect cannot be obtained quickly when the engine is cold because its heating value per unit time tends to decrease gradually because the viscosity drops and the shearing resistance drops when the temperature of the silicon oil increases. Therefore, such viscous type heater has not been fully effective in case of a vehicle specific for a cold district and carrying a diesel engine in particular and an auxiliary heater capable of heating the heat transferring fluid efficiently in a shorter time has been requested.
The present invention has been devised in view of such problems of the viscous type heater and its object is to provide a magnetic heater which is capable of heating the heat transferring fluid to high temperature in a short time and is excels in the heat resistance as compared to the viscous type heater.
SUMMARY OF THE INVENTION
An inventive magnetic heater is of the type in which a slip heat generated in the conductor side by shearing a magnetic path created between a magnet and a conductor is heat-exchanged to heat transferring fluid. Its gist is that the magnet and the conductor are disposed so as to face each other leaving a slight gap and the heat transferring fluid is heated by the slip heat which is generated in the conductor by relatively rotating the magnet and the conductor.
Its first aspect is characterized in that a magnet and a conductor are disposed facing each other while leaving a slight gap and heat transferring fluid is heated by slip heat which is generated in the conductor by relatively rotating the magnet and the conductor.
A second aspect thereof is characterized in that in the magnetic heater of the type in which a magnet and a conductor are disposed so as to face to each other leaving a slight gap and heat transferring fluid is heated by slip heat which is generated in the conductor by relatively rotating the magnet and the conductor, the magnetic heater comprises the permanent magnet fixed to a housing supported to a driving shaft via a bearing; and a disc-like conductor facing to the permanent magnet while leaving a slight gap provided rotably by a driving shaft within a housing; and the heat transferring fluid introduced to the inside of the housing is heated by the slip heat generated in the conductor as the disc-like conductor rotates.
A third aspect is characterized in that in the magnetic heater of the type in which a magnet and a conductor are disposed so as to face to each other leaving a slight gap and heat transferring fluid is heated by slip heat which is generated in the conductor by relatively rotating the magnet and the conductor, the magnetic heater comprises a permanent magnet and a heat transferring fluid jacket having the conductor disposed so as to face to the permanent magnet leaving a slight gap rotably provided by a driving shaft within a housing supported by the driving shaft via a bearing; and the heat transferring fluid introduced to the inside of the housing is heated by the slip heat generated in the conductor as the heat transferring fluid jacket rotates.
A fourth aspect is characterized in that in the magnetic heater of the type in which a magnet and a conductor are disposed so as to face each other leaving a slight gap and heat transferring fluid is heated by slip heat which is generated in the conductor by relatively rotating the magnet and the conductor, the magnetic heater comprises a pair of right and left permanent magnets disposed so as to face leaving a gap; and a heat transferring fluid jacket having a pair of right and left conductors interposed between the permanent magnets and disposed so as to face to the respective permanent magnets leaving a slight gap and are provided with heat transferring fluid passages therein are provided rotably by a driving shaft within the housing supported by the driving shaft via a bearing; and the heat transferring fluid introduced to the inside of the housing is heated by the slip heat generated in the conductors as the heat transferring fluid jacket rotates.
A fifth aspect is characterized in that a permanent magnet rotor disposed so as to face to a conductor while leaving a slight gap is fixed around a driving shaft rotably supported via a bearing in a cylindrical housing provided with a heat transferring fluid jacket for circulating heat transferring fluid at the outer periphery thereof and the conductor is fixed on the inner peripheral surface thereof and the heat transferring fluid within the heat transferring fluid jacket is heated by slip heat generated in the conductor as the permanent magnet rotor rotates.
A sixth aspect is characterized in that in the magnetic heater of the type in which a magnet and a conductor are disposed so as to face each other leaving a slight gap and heat transferring fluid is heated by slip heat which is generated in the conductor by relatively rotating the magnet and the conductor, the magnetic heater comprises the conductor non-rotably supported to a driving shaft as
Inoue Hiroshi
Takikawa Kazunori
Usui Masayoshi
Yamada Masato
Casella Anthony J.
Hespos Gerald E.
Hoang Tu Ba
Usui Kokusai Sanyo Kaisha LTD
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