Patent ID: 7669432
Filing Date: 2010-03-02
Classification: F25B,F25D

Abstract:
1. A method comprising: cycling an electronic evaporator pressure regulator valve fluidly coupled to a refrigeration circuit to regulate flow through said electronic evaporator pressure regulator valve; sensing a current drawn by said electronic evaporator pressure regulator valve during cycling of said electronic evaporator pressure regulator valve between a fully open position and a fully closed position to determine a baseline number of steps of valve movement between said fully open position and said fully closed position; sensing current drawn by said electronic evaporator pressure regulator valve during normal use to determine a number of steps of valve movement between said fully open position and said fully closed position; comparing said determined number of steps of valve movement during normal use to said baseline number of steps; and determining a valve condition of said electronic evaporator pressure regulator valve based on said comparison.