Electronic expansion valve

摘要

An electronic expansion valve is provided, a sleeve is fixed in a main valve cavity of the electronic expansion valve, and a valve core seat is axially movably provided in the sleeve; a circumferential side wall of the sleeve is provided with a sleeve flow passage, and a circumferential side wall of the valve core seat is provided with a valve core seat side hole; and when the refrigerant flows forward, the valve core seat closes the main valve port to disconnect a communication between the sleeve flow passage and the valve core seat side hole, and the refrigerant flows to the valve core valve port through the sleeve flow passage; and when the refrigerant flows reversely, the valve core seat moves upward to open the main valve port to communicate the valve core seat side hole with the sleeve flow passage.

主权项

1. An electronic expansion valve, comprising a valve seat, a vertical connecting pipe and a transverse connecting pipe, the valve seat being provided with a main valve cavity; wherein the electronic expansion valve further comprises a main valve port in communication with the vertical connecting pipe and a valve core seat configured to open and close the main valve port, the valve core seat is provided with a valve core valve port which allows a communication with the vertical connecting pipe; and the electronic expansion valve further comprises a valve needle component configured to open and close the valve core valve port; and the electronic expansion valve further comprises a drive component for driving the valve needle component to move axially, and the drive component comprises a screw rod and a nut which cooperates with the screw rod by screw threads; and
in a case that refrigerant flows forwards, the valve core seat closes the main valve port, the refrigerant flows to the vertical connecting pipe through the valve core valve port, and the valve needle component is driven by the drive component to regulate an opening of the valve core valve port; and in a case that the refrigerant flows reversely, the valve core seat moves upward to open the main valve port, and the refrigerant flows to the transverse connecting pipe through the main valve port, wherein a sleeve is fixed in the main valve cavity, the valve core seat is axially movably provided in the sleeve, and a lower portion of the valve needle component extends into the sleeve to open and close the valve core valve port; and a circumferential side wall of the sleeve is provided with a sleeve flow passage which allows a communication between an inner cavity of the sleeve and the main valve cavity; the valve core seat is provided with a valve core seat through hole in communication with the vertical connecting pipe, and an aperture at an upper end of the valve core seat through hole forms the valve core valve port, and a circumferential side wall of the valve core seat is provided with a valve core seat side hole in communication with the valve core seat through hole; and in a case that the refrigerant flows forward, the valve core seat closes the main valve port to disconnect a communication between the sleeve flow passage and the valve core seat side hole, and the refrigerant flows to the valve core valve port through the sleeve flow passage; and in a case that the refrigerant flows reversely, the valve core seat moves upward to open the main valve port to communicate the valve core seat side hole with the sleeve flow passage.