Thermostat apparatus

• US 8,186,604 B2
• Filed: 02/22/2007
• Issued: 05/29/2012
• Est. Priority Date: 03/17/2006
• Status: Active Grant

• Current Assignee: Fuji Bellows Co., Ltd.
• Original Assignee: Corea Electronics Corporation, Fuji Bellows Co., Ltd.
• Inventors: Park, Hee Wan
• Primary Examiner(s): Norman, Marc
• Application Number:
  US12/224,825
• Publication Number:
  US 20100012738A1
• Time in Patent Office: 1,923 Days
• Field of Search: 236/34, 236/34.5, 236/93.R, 236/100, 236/99.J, 236/101.C
• US Class Current: 236/34.5
• CPC Class Codes: F01P 2037/02 starting
• CPC Class Codes: F01P 2060/08 Cabin heater
• CPC Class Codes: F01P 7/16 by thermostatic control
• CPC Class Codes: G05D 23/1333 measuring the temperature of incoming fluid

Abstract

An apparatus includes a movable temperature sensing member capable of sensing mainly the temperature of high-temperature coolant flowing in from a high-temperature coolant port and driving toward the side of the high-temperature coolant port in dependence upon the sensed temperature; a main valve fitted integrally to the movable temperature sensing member and constructed so as to render a low-temperature coolant port and a mixing compartment openable in conformity to the driving of the movable temperature sensing member toward the side of the high-temperature coolant port, thereby controlling the inflow rate of low-temperature coolant from the low-temperature coolant port to the mixing compartment; and a high-temperature coolant inducing part communicating with the high-temperature coolant port and adapted to regulate the flow of high-temperature coolant from the high-temperature coolant port toward the surround of the movable temperature sensing member and effect outflow thereof to the mixing compartment.

Claims

1. A thermostat apparatus in a coolant circuit of an engine, said apparatus comprising:

a temperature sensitive movable part including a thermal extension body configured to thermally expand to contract in response to a change in temperature of a coolant, and a piston shaft having one end retained in the temperature sensitive movable part and being configured to slide in response to the thermal expansion or contraction of the thermal extension body, a main valve of the thermostat apparatus being opened or closed when the piston shaft is driven; and

a conduit configured so as to bypass a high-temperature coolant heated by the engine to the thermostat apparatus, the conduit being configured so as to extend until the conduit covers all of or a part of the temperature sensitive movable part and form a high-temperature coolant conduit having an inside diameter commensurate with an outside diameter of the temperature sensitive movable part so as to cause the high-temperature coolant flowing through the conduit to directly contact a periphery of the temperature sensitive movable part without impairing a temperature and a flow rate of the high-temperature coolant, and let the high-temperature coolant flow out of an ejection opening.

2. The thermostat apparatus according to claim 1, wherein the temperature sensitive movable part includes an extension shaft configured to be supported and guided to a support guide part in the high-temperature coolant conduit.

3. The thermostat apparatus according to claim 1, wherein the temperature sensitive movable part is configured and arranged to be inserted and guided to a support guide part in the high-temperature coolant conduit.

4. The thermostat apparatus according to 1, wherein the high-temperature coolant conduit has a small-diameter portion configured so as to inwardly narrow, and

a clearance between the temperature sensitive movable part and the high-temperature coolant conduit is freely restricted according to driving of the temperature sensitive movable part.