Valve device and fluid circulation circuit

A valve device comprising:

• a flow path formation member defining a flow path hole through which a fluid passes, the flow path formation member having an opening surface in which the flow path hole is opened;
• a drive part configured to output a rotational force;
• a shaft configured to be rotatable about a predetermined axis by the rotational force output from the drive part;
• a rotor having a sliding surface that is slidable while facing the opening surface of the flow path formation member, the rotor being configured to increase or decrease an opening degree of the flow path hole with rotation of the shaft;
• and
• an energization member configured to energize the rotor toward the flow path formation member, wherein
• the shaft is tiltably coupled to the rotor, to hold a contact state between the sliding surface of the rotor and the opening surface of the flow path formation member regardless of a position of the shaft,
• the shaft has a fitting part fitted into a fitting hole provided in the rotor, and
• the fitting hole of the rotor has a size in which a gap is formed between the fitting hole and the shaft, and the shaft is tiltable in a state where the fitting part is fitted.

A fluid circulation circuit comprising:

• a plurality of devices through which a fluid passes;
• and
• a valve device configured to regulate a flow rate of the fluid passing through the plurality of devices, wherein
• the valve device includes
• a flow path formation member provided with at least one flow path hole through which the fluid passes,
• a drive part configured to output a rotational force,
• a shaft configured to be rotatable about a predetermined axis by the rotational force output from the drive part,
• a rotor having a sliding surface that slides while facing an opening surface of the flow path formation member where the flow path hole is opened, the rotor being configured to increase or decrease an opening degree of the flow path hole with rotation of the shaft,
• an energization member configured to energize and bias the rotor toward the flow path formation member, and
• a coupling structure configured to tiltably couple the shaft to the rotor, and to hold a contact state between the sliding surface and the opening surface regardless of a position of the shaft.