Electronic expansion valve
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United States of America Patent
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Jul 5, 2016
Grant Date -
Apr 17, 2014
app pub date -
Jun 26, 2012
filing date -
Jun 27, 2011
priority date (Note) -
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Abstract
Disclosed in the present invention is an electronic expansion valve, which comprises a valve seat assembly (7) and a valve housing assembly (5) connected to the valve seat assembly (7). A valve stem assembly (6) and a valve port (121) are disposed in the chamber of the valve seat assembly (7), and an electrical motor (51) is situated in the chamber of the valve housing assembly (5). The electrical motor (51) drives the valve stem assembly (6) to move along an axial direction through a gear system (52) so as to adjust the flow rate of the fluid flowing through the valve port (121). The valve seat assembly (7) has a split structure, which comprises a valve seat (1) and a cover (9) connected to the valve seat (1) and to the valve housing assembly (5). A mounting surface (13) is formed on the outer side of the valve seat (1) and a sight glass (8) is connected thereon. The structure of the expansion valve enables the sight glass (8) to be easily attached to the valve seat assembly (7).
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