Patent ID: 8528590

Claim:
A one-way refrigeration valve assembly comprising: a valve body having spaced inlet and outlet passageways separated by an intermediate valve seat in open communication with the inlet and outlet passageways; a piston reciprocable within a bore in the valve body and forming a chamber with a portion of the bore above the piston, the piston including a valve member being adapted to sealingly mate with the valve seat; an adapter body secured to an open end of the bore in the valve body; a first conduit connecting the chamber above the piston to the outlet passageway, a solenoid assembly operable to open and close the first conduit; a second conduit connecting the chamber above the piston to the outlet passageway independently of the inlet passageway, the second conduit bypassing the solenoid assembly; a first check valve positioned in the second conduit and oriented to allow fluid flow from the outlet passageway to the chamber above the piston independently of the inlet passageway when pressure in the outlet passageway is greater than the pressure in the chamber above the piston, the first check valve preventing flow from the chamber above the piston to the outlet passageway when the pressure in the chamber above the piston is greater than the pressure in the outlet passageway; and a second check valve positioned through a portion of the piston and oriented to allow fluid flow from the inlet passageway to the chamber above the piston when pressure in the inlet passageway is greater than the pressure in the chamber above the piston, the second check valve preventing flow from the chamber above the piston to the inlet passageway when the pressure in the chamber above the piston is greater than the pressure at the inlet passageway, wherein when the solenoid assembly is open, flow from the chamber to the inlet passageway is precluded.