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

A three-way valve for flow rate control, comprising:

• a valve main body including a valve seat having a columnar space and having a first valve port, a second valve port, and first and second inflow ports, the first valve port having a rectangular cross section and allowing inflow of a first fluid, the second valve port having a rectangular cross section and allowing inflow of a second fluid, the first and second inflow ports being configured to allow an outside and the first and second valve ports to communicate with each other, respectively;
• a valve body having a cylindrical shape and having an opening, which is arranged in a freely rotatable manner in the valve seat of the valve main body, and simultaneously switches the first valve port from a closed state to an opened state and switches the 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 comprising a plurality of sealing means;
• a bearing member configured to rotatably support the end portion of the valve body on the side closer to the drive means is arranged between the plurality of sealing means, wherein the sealing means comprises a spring member made of a metal and having a substantially circular or elliptical cross section and a ring member made of a synthetic resin and having a substantially U-shaped cross section to form a groove, and the spring member is disposed in the groove of the ring member so that the ring member presses the spring member outwardly, and
• the bearing member is arranged to contact with the plurality of sealing means.