Electronic expansion valve and refrigeration system including the same

摘要

An electronic expansion valve and a refrigeration system including the same are disclosed. The electronic expansion valve is a valve body (10) having a first valve opening (11) and a valve needle (20) having a closed position and an open position and a second valve opening (221) at the bottom. A valve needle (20) having a storage space (23), a first fluid passage (211) communicating with the outside world, and a second fluid passage (222) communicating with the second valve opening (221). A valve rod (30) at least partially bored in the accommodation space (23), a first muffling section (40) installed in the accommodation space (23), and a valve rod installed in the accommodation space (23). A first seal part (50) located between the first silencing part (40) and the second fluid passageway (222), in which a third fluid passageway (51) is installed, and a storage space ( 23) and the second fluid passageway (222) and the first seal portion (50) communicating with the third fluid passageway (51) and the valve rod (30) are driven to move up and down. And part. The electronic expansion valve can effectively solve the problem of large noise in the conventional electronic expansion valve.