Control valve
There is provided a control valve including a cylindrical casing having an inlet port and a first outlet port for a fluid, and a valve accommodated in the casing to be rotatable around an axis extending in an axial direction of the casing and having a flow path communicating with the inlet port to allow the fluid to flow therethrough, wherein a first communication port communicating with the flow path and the first outlet port according to a rotational position of the valve is formed in the valve, and a fail opening configured to be opened and closed by a thermostat is formed in a portion of the casing facing the inlet port in an opening direction of the inlet port.
1. A control valve comprising:
a cylindrical casing having an inlet port and a first outlet port for a fluid, and
a valve accommodated in the casing to be rotatable around an axis extending in an axial direction of the casing and having a flow path communicating with the inlet port to allow the fluid to flow therethrough, wherein
a first communication port communicating with the flow path and the first outlet port according to a rotational position of the valve is formed in the valve, and
a fail opening configured to be opened and closed by a thermostat is formed in a portion of the casing so as to face the inlet port in a radial direction of the casing,
wherein a second outlet port configured to open in a direction intersecting the opening direction of the fail opening is formed in a portion of the casing adjacent to the fail opening.
2. The control valve according to claim 1 , wherein
the casing includes a bottomed cylindrical casing main body and a cover body configured to close an opening of the casing main body,
the fail opening radially passes through a portion of the casing main body located close to the cover body in the axial direction,
the second outlet port passes through the cover body in the axial direction, and
a first joint which connects between a heat exchanger disposed outside the casing and the second outlet port is integrally formed with the cover body.
3. The control valve according to claim 1 , wherein
the valve includes a rotating shaft rotatably supported by the casing and a valve cylinder portion configured to surround a part of the rotating shaft in the axial direction, the valve cylinder portion configured to partition and define the flow path between the valve cylinder portion and the rotating shaft and in which the first communication port is formed,
a connection flow path configured to communicate the inlet port and the flow path with each other is formed at a position in the casing which avoids the valve cylinder portion in the axial direction, and
the second outlet port directly communicates with the connection flow path.
4. The control valve according to of claim 1 , wherein
the valve includes a rotating shaft of which both ends in the axial direction are rotatably supported by the casing via a bearing and a valve cylinder portion configured to surround the rotating shaft, the valve cylinder portion configured to partition and define the flow path between the valve cylinder portion and the rotating shaft and in which the first communication port is formed,
a seal ring is disposed between a portion of the casing positioned inside in the axial direction with respect to the bearing and the rotating shaft, and
an atmospheric opening portion which opens to the atmosphere is formed at a portion of the casing positioned outside in the axial direction with respect to the seal ring.
5. The control valve according to claim 1 , wherein
the first outlet port and the fail opening are formed side by side in the casing, and
an outer surface of the casing has a welding portion which surrounds the first outlet port and the fail opening and on which a second joint collectively communicating with the first outlet port and the fail opening is welded.
6. The control valve according to claim 5 , wherein the second joint is connected to a radiator of a vehicle.