ELECTRONIC EXPANSION VALVE

WIPO Patent Application WO/2021/218804

A1

An electronic expansion valve, comprising a seat, a body component, and a spool. The body component comprises a body, and the body is fixedly connected to the seat; the seat comprises port parts, the electronic expansion valve comprises a first chamber and a second chamber, the first chamber is located on the upper side relative to the port parts, and the second chamber is located on the lower side relative to the port parts; the electronic expansion valve is provided with a first interface and a second interface, the nominal diameter of the port is smaller than the nominal diameter of the second interface, and the nominal diameter of the second interface is smaller than the nominal diameter of the second chamber; the port part comprises a transition part, a matching part, and a flared part, the transition part is closer to the first chamber (A) with respect to the matching part, the flared part is closer to the second chamber (B) with respect to the matching part, and the height h1 of the matching part, the height h2 of the flared part, and the height h3 of the transition part satisfy a relation: h3