摘要 |
A pulse controlled refrigeration expansion valve and method of controlling the valve is disclosed. The valve is preferably an on/off (open/closed) direct controlled solenoid valve. The valve is periodically energized (opened) and de-energized (closed) in response to a refrigeration system parameter (e.g., superheat) such that the ratio of energization time/de-energization time during each period of operation of the valve is varied in response to the system parameter(s) and such that the on/off solenoid valve functions as a modulated refrigerant flow control expansion valve.
|