초록 ▼

A liquid flow rate control valve is provided in which since a total area of overlapping sections of a communication hole group (38c, 38d) of a distributor (38) and an outlet opening (37a, 37b) of a sleeve (37) changes when the distributor (38) is rotated by a first electric motor (46), if a rotor (4

A liquid flow rate control valve is provided in which since a total area of overlapping sections of a communication hole group (38c, 38d) of a distributor (38) and an outlet opening (37a, 37b) of a sleeve (37) changes when the distributor (38) is rotated by a first electric motor (46), if a rotor (42) is rotated by means of a second electric motor (47), an input port (31e) communicates with an output port (31f) through an inlet opening (42c, 42d) of the rotor (42), the communication hole group (38c, 38d) of the distributor (38), and the outlet opening (37a, 37b) of the sleeve (37) when the inlet opening (42c, 42d) of the rotor (42) passes through the overlapping sections, thereby making it possible to carry out PWM control of a flow rate of liquid. Since a thrust load in an axis (L) direction does not act on the distributor (38) and the rotor (42), supporting the distributor (38) and the rotor (42) becomes easy, thereby enabling the cost and weight to be cut.

대표청구항 ▼

1. A liquid flow rate control valve comprising: a valve housing having an input port and an output port formed therein;a cylindrical sleeve fixed to an interior of the valve housing and having formed therein an outlet opening communicating with the output port,a cylindrical distributor relatively ro

1. A liquid flow rate control valve comprising: a valve housing having an input port and an output port formed therein;a cylindrical sleeve fixed to an interior of the valve housing and having formed therein an outlet opening communicating with the output port,a cylindrical distributor relatively rotatably fitted into an inner periphery of the sleeve, driven to rotate by a first drive source, and having a communication hole group formed therein, a total area of overlap of the communication hole group with the outlet opening changing according to a rotational position of the cylindrical distributor; anda cylindrical rotor relatively rotatably fitted into an interior of the distributor, driven to rotate by a second drive source, having an interior space thereof connected to the input port, and having an inlet opening formed therein, a position at which the inlet opening communicates with overlapping sections of the outlet opening and the communication hole group changing in response to rotation of the cylindrical rotor;wherein the sleeve comprises first and second outlet openings having a central angle of 180°, having phases displaced from each other by 180°, and being spaced so as not to overlap one another in an axis direction,the distributor comprises first and second communication hole groups having a central angle of 180°, having phases displaced from each other by 180°, and being spaced so as not to overlap one another in the axis direction, andthe rotor comprises two sets of first and second inlet openings having the same phase at positions with a phase difference of 180°. 2. The liquid flow rate control valve according to claim 1, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, an area of opening of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 3. The liquid flow rate control valve according to claim 1, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, a hole diameter of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 4. A liquid flow rate control valve comprising: a valve housing having an input port and an output port formed therein;a cylindrical sleeve fixed to an interior of the valve housing and having formed therein an outlet opening communicating with the output port,a cylindrical distributor relatively rotatably fitted into an inner periphery of the sleeve, driven to rotate by a first drive source, and having a communication hole group formed therein, a total area of overlap of the communication hole group with the outlet opening changing according to a rotational position of the cylindrical distributor; anda cylindrical rotor relatively rotatably fitted into an interior of the distributor, driven to rotate by a second drive source, having an interior space thereof connected to the input port, and having an inlet opening formed therein, a position at which the inlet opening communicates with overlapping sections of the outlet opening and the communication hole group changing in response to rotation of the cylindrical rotor;wherein the sleeve comprises first to third outlet openings having a central angle of 120°, having phases displaced from each other by 120°, and being spaced so as not to overlap one another in the axis direction,the distributor comprises first to third communication hole groups having a central angle of 120°, having phases displaced from each other by 120°, and being spaced so as not to overlap one another in the axis direction, andthe rotor comprises three sets of first to third inlet openings having the same phase at positions with a phase difference of 120°. 5. The liquid flow rate control valve according to claim 4, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, an area of opening of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 6. The liquid flow rate control valve according to claim 4, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, a hole diameter of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 7. A liquid flow rate control valve comprising: a valve housing having an input port and an output port formed therein;a cylindrical sleeve fixed to an interior of the valve housing and having formed therein an outlet opening communicating with the output port,a cylindrical distributor relatively rotatably fitted into an inner periphery of the sleeve, driven to rotate by a first drive source, and having a communication hole group formed therein, a total area of overlap of the communication hole group with the outlet opening changing according to a rotational position of the cylindrical distributor; anda cylindrical rotor relatively rotatably fitted into an interior of the distributor, driven to rotate by a second drive source, having an interior space thereof connected to the input port, and having an inlet opening formed therein, a position at which the inlet opening communicates with overlapping sections of the outlet opening and the communication hole group changing in response to rotation of the cylindrical rotor,wherein the communication hole group of the distributor is disposed so that, when a liquid passes through the communication hole group of the distributor, a load that the liquid exerts on the distributor does not cause a moment that makes the axis of the distributor tilt. 8. The liquid flow rate control valve according to claim 7, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, an area of opening of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 9. The liquid flow rate control valve according to claim 7, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, a hole diameter of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 10. The liquid flow rate control valve according to claim 7, wherein the sleeve comprises first and second outlet openings having a central angle of 90°, having phases displaced from each other by 180°, and being disposed at positions so as to overlap one another in the axis direction, and the distributor comprises first and second communication hole groups having a central angle of 90°, having phases displaced from each other by 180°, and being disposed at positions so as to overlap one another in the axis direction, andthe rotor comprises at a phase difference of 90° two first inlet openings having phases displaced from each other by 180° and two second inlet openings having phases displaced from each other by 180°, the first and second inlet openings being capable of communicating with the first and second communication hole groups. 11. The liquid flow rate control valve according to claim 10, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, an area of opening of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 12. The liquid flow rate control valve according to claim 10, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, a hole diameter of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 13. The liquid flow rate control valve according to claim 7, wherein the sleeve comprises first and third outlet openings and a second outlet opening having a central angle of 180°, having phases displaced from each other by 180°, and being spaced so as not to overlap one another in the axis direction, a width in the axis direction of the second outlet opening positioned in a middle being twice a width in the axis direction of the first and third outlet openings positioned on opposite sides thereof, the distributor comprises first and third communication hole groups and a second communication hole group having a central angle of 180°, having phases displaced from each other by 180°, and being spaced so as not to overlap one another in the axis direction, a width in the axis direction of the second communication hole group positioned in a middle being twice a width in the axis direction of the first and third communication hole groups positioned on opposite sides thereof, andthe rotor comprises two sets of first to third inlet openings having the same phase at positions with a phase difference of 180°, the first to third inlet openings being capable of communicating with the first to third communication hole groups respectively. 14. The liquid flow rate control valve according to claim 13, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, an area of opening of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases. 15. The liquid flow rate control valve according claim 13, wherein when the overlapping sections of the outlet opening of the sleeve and the communication hole group of the distributor are a minimum, a hole diameter of the communication hole group of the distributor communicating with the inlet opening of the rotor decreases.