Electronic expansion valve and refrigeration system having the same

摘要

An electronic expansion valve and a refrigeration system having the same are disclosed. An electronic expansion valve includes: a valve body (10) having a first valve port (11); A valve needle 20 having a closed position and an open position is provided with a second valve port 221 at the lowermost portion of the valve needle 20 and a valve needle 20 is provided in the receiving space 23, 211, and a second overflow channel (222), the first overflow channel (211) communicating with the outside world and the second overflow channel (222) communicating with the second valve port (221); A valve rod (30) at least partly passing through the receiving space (23); A first noise reduction section 40 provided in the accommodation space 23; A first sealing portion 50 provided in the receiving space 23 and positioned between the first sound absorbing portion 40 and the second air extinguishing channel 222 such that the third air extinguishing channel 51 communicates with the first sealing portion 50), and the accommodation space (23) communicates with the second overflow channel (222) by a third overflow channel (51); And a driving unit for driving the valve rod 30 to move up and down. The electronic expansion valve can effectively solve the problems of the prior art that the noise of the electronic expansion valve is large.