| 摘要 |
<p>A thermostat in which machinability and assembling performance are enhanced while reducing the cost with a minimum necessary number of components, and the entirety of thermostat can be made compact. The thermostat comprises a first valve element (22) for opening/closing a first fluid passage (3b) and a second valve element (23) for opening/closing a second fluid passage (3d), wherein the operation of these valve elements is interlocked with the motion of a working body (21) caused by temperature variation of fluid to open one of the first and second fluid passages and to close the other. The working body is encapsulating a thermal expansion body (32) expanding/contracting in accordance with temperature variation on one end side, and having a case (31) for holding a piston (33) to advance/retract freely from an opening on the other end side. An outward flange part (36) provided at the opening part on the other end side of the case serves as the first valve element.</p> |
