Vaned spool type directional control valve and four-way reversible valve for cooling cycle system using the same
AssigneeAser Tech Co., Ltd.
InventorYun Boon Lee
Life of this patent
Estimating the term…
Abstract
A vaned spool type directional control valve used to change a direction of motion of an actuator in an air pressure or oil hydraulic circuit includes a vaned spool having a valve portion and a vane portion integrally formed on a spool shaft. A chamber including a shaft support portion, a valve room, and a vane room is formed corresponding to the vaned spool. Main ports connected to the valve room in the chamber and two vane ports penetrating the opposed sides of the vane room are formed in the directional control valve. The directional control valve is of a pilot operated type so that flow of fluid in a main circuit can be changed by rotating the vane spool using the pressure of a pilot fluid.
Claims17
A vaned spool type directional control valve comprising:
- a vaned spool including a spool shaft, a valve portion extending from one side of the spool shaft, and a vane portion extending from the other side of the spool shaft;
- and
- a valve main body including:
- a chamber including a shaft support portion rotatably supporting the spool shaft, a valve room extending from one side of the shaft support portion and accommodating the valve portion of the vaned spool so that the valve portion rotates and moves in a sealed state, and a vane room extending from the other side of the shaft support portion and accommodating the vane portion of the vaned spool so that the vane portion rotates and moves in a sealed state;
- a plurality of main ports through which fluid passes via the valve room of the chamber;
- and
- two vane ports through which pilot fluid passes formed at the opposed sides of the vane room of the chamber,
- wherein the vaned spool is rotated by pressure of the pilot fluid passing through the vane port.
A vaned spool type directional control valve comprising:
- a vaned spool including a spool shaft, a valve portion extending from one side of the spool shaft, and a vane portion extending from the other side of the spool shaft;
- a valve main body including:
- a chamber including a shaft support portion rotatably supporting the spool shaft, a valve room extending from one side of the shaft support portion and accommodating the valve portion of the vaned spool so that the valve portion rotate and move in a sealed state, and a vane room extending from the other side of the shaft support portion and accommodating the vane portion of the vaned spool so that the vane portion rotate and move in a sealed state;
- a plurality of main ports through which fluid passes via the valve room of the chamber;
- and
- two vane ports through which pilot fluid passes formed at the opposed sides of the vane room of the chamber;
- and
- a pilot valve unit taking some of fluid supplied from one of the main ports and changing flow of the fluid with respect to the vane port.
A vaned spool type directional control valve comprising:
- a vaned spool including a spool shaft, a valve portion extending from one side of the spool shaft, and a vane portion extending from the other side of the spool shaft;
- a valve main body including:
- a chamber including a shaft support portion rotatably supporting the spool shaft, a valve room extending from one side of the shaft support portion and accommodating the valve portion of the vaned spool so that the valve portion rotate and move in a sealed state, and a vane room extending from the other side of the shaft support portion and accommodating the vane portion of the vaned spool so that the vane portion rotate and move in a sealed state;
- a plurality of main ports connection holes through which fluid passes via the valve room of the chamber;
- and
- two vane ports through which pilot fluid passes formed at the opposed sides of the vane room of the chamber;
- a valve casing accommodating the valve main body in a fixed state, forming a seal, and having a plurality of main ports connected to the main port connection holes and a plurality of refrigerant connection pipes for the connection of refrigerant pipes corresponding to the main ports;
- and
- a pilot valve unit taking some of the refrigerant supplied from one of the main ports and changing flow of the refrigerant with respect to the vane port.
Dependencies are inferred from the claim text.