Valve device and fluid circulation circuit

A valve device comprising:

• a housing integrally or separately having a flow path formation part where at least one flow path hole through which a fluid passes is formed;
• a drive part that outputs a rotational force;
• and
• a rotation part that rotates about a predetermined axis by the rotational force output from the drive part,
• the rotation part includes
• a shaft and a rotor that increases or decreases an opening degree of the flow path hole with rotation of the shaft,
• at least a part of the rotation part is rotatably held by the housing,
• the shaft has a one-end-side portion to which the rotational force is transmitted from the drive part and an other-end-side portion opposite to the one-end-side portion in an axial direction of the shaft,
• at least a part of the other-end-side portion is rotatably held by the housing,
• the rotation part includes an intermediate element that couples the rotor to the shaft such that a gap is formed between the other-end-side portion and the rotor, and
• the housing has an end reception part that receives at least a part of the other-end-side portion.

A fluid circulation circuit comprising:

• a plurality of devices in which a fluid passes;
• and
• a valve device that regulates a flow rate of the fluid passing in the plurality of devices, wherein
• the valve device includes
• a housing integrally or separately having a flow path formation part where at least one flow path hole in which the fluid passes is formed;
• a drive part that outputs a rotational force;
• and
• a rotation part that rotates about a predetermined axis by the rotational force output from the drive part,
• the rotation part includes a shaft and a rotor having a sliding surface that slides while facing an opening surface of the flow path formation part where the flow path hole is opened, the rotor increasing or decreasing an opening degree of the flow path hole with rotation of the shaft,
• at least a part of the rotation part is rotatably held by the housing,
• the shaft has a one-end-side portion to which the rotational force is transmitted from the drive part and an other-end-side portion opposite to the one-end-side portion in an axial direction of the shaft,
• at least a part of the other-end-side portion is rotatably held by the housing,
• the rotation part includes an intermediate element that couples the rotor to the shaft such that a gap is formed between the other-end-side portion and the rotor, and
• the housing has an end reception part that receives at least a part of the other-end-side portion.