Three-way valve for flow rate control and temperature control device

Abstract

Provided are a three-way valve for flow rate control and a temperature control device, which have improved sealing performance at a sealed portion at which a valve body is rotatably sealed against a fluid having a low temperature of about −85° C. as compared to a case without sealing means for sealing an end portion of the valve body on a side closer to drive means so that the end portion is rotatable with respect to a valve main body, the sealing means having a substantially U-shaped cross section and being made of a synthetic resin, and being urged in an opening direction by a spring member made of a metal. The three-way valve for flow rate control includes: a valve body having a cylindrical shape and having an opening, which is arranged in a freely rotatable manner in a valve seat of a valve main body, and simultaneously switches a first valve port from a closed state to an opened state and switches a second valve port from an opened state to a closed state; drive means for driving the valve body to rotate; and sealing means for sealing an end portion of the valve body on a side closer to the drive means so that the end portion is rotatable with respect to the valve main body, the sealing means having a substantially U-shaped cross section and being made of a synthetic resin, and being urged in an opening direction by a spring member made of a metal.