Liquid flow rate control valve
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United States of America Patent
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Sep 2, 2014
Grant Date -
Sep 20, 2012
app pub date -
Sep 30, 2010
filing date -
Oct 1, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A liquid flow rate control valve is provided in which since a distributor (38) is rotated relative to a sleeve (37) by a first drive source (46) only through a predetermined angle, the total area of overlapping sections of a first opening (37a) of the sleeve (37) and the second opening (38c) of the distributor (38) changes, and a rotor (42) having a third opening (42c 42d) is rotated by a second drive source (47), it is possible to carry out PWM control of the liquid input from an input port (61e) and output it from an output port (61f). In this process, one end in an axis (L) direction of the rotor (42) disposed on an inside in a radial direction is coaxially connected to the second drive source (47), and one end in the axis (L) direction of the distributor (38) disposed on an outside in a radial direction is connected to the first drive source (46) via a gear train (66, 73, 70), and therefore, it is possible to individually rotate the distributor (38) and the rotor (42) while achieving a compact size by arranging the first and second drive sources (46, 47) in a concentrated manner at one end in the axis (L) direction of a liquid flow rate control valve (23).
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