Patent ID: 6761321
Filing Date: 2004-07-13
Classification: A61B,A61M,F01P,G05B,G05D,G16H

Abstract:
A thermostat device comprising:a thermo-element including a temperature sensing section which is disposed so as to sense a temperature of cooling water flowing in a cooling water path by contacting the temperature sensing section only with cooling water from an engine outlet side without directly contacting cooling water from a radiator outlet side; a first valve body and a second valve body; a shaft connecting said temperature sensing section and said first and second valve bodies, said temperature sensing section being configured to move said first and second valve bodies to open and close according to the temperature of the cooling water; a heat-generating element attached to said temperature sensing section and configured to control movements of the first and second valve bodies to open and close; an upper housing including a first influx sleeve through which cooling water enters from the engine outlet and a second influx sleeve through which cooling water enters from the radiator, said first valve body being disposed in the upper housing such that said thermo-element opens and closes said second sleeve by sensing the temperature of the cooling water from said first influx sleeve; and a lower housing in which a mixing chamber is formed to mix the cooling water from the engine outlet, or the cooling water from the engine outlet and the cooling water from the radiator, a main channel being formed in the lower housing to discharge the cooling water from said mixing chamber to an interior of the engine, wherein a third influx sleeve is formed in said lower housing so that the cooling water from a heater for heating the interior of a vehicle and cooling water which circulates through various internal combustion engine control devices are controlled to flow into the mixing chamber by means of the opening and closing of said second valve body.