ELECTRONIC EXPANSION VALVE

WIPO Patent Application WO/2024/060983

A1

Disclosed is an electronic expansion valve, comprising a valve seat portion (10), a sealing gasket (20) and a valve head (30). The valve seat portion (10) is provided with a valve cavity (11) and a first flow channel (12). The sealing gasket (20) is located in the valve seat portion (10) and has a sealing fit with the valve seat portion (10). The sealing gasket (20) is disposed surrounding the first flow channel (12), the sealing gasket (20) is provided with a second flow channel (21), and the first flow channel (12) is in communication with the second flow channel (21). The valve head (30) is movably disposed in the valve cavity (11), so as to open and close the second flow channel (21). When the second flow channel (21) is opened, the second flow channel (21) is in communication with the valve cavity (11). The first flow channel (12) and the second flow channel (21) form a variable flow channel, the circulation areas of two ends of the variable flow channel being S1 and S2, respectively, the minimum circulation area in the middle of the variable flow channel being S3, S3