Patent ID: 6397605
Filing Date: 2002-06-04
Classification: F25B

Abstract:
A method of operating a stirling cooler, the stirling cooler comprising a driver, a first cylinder including a piston, a second cylinder in fluid communication with said first cylinder through a conduit, said second cylinder comprising:a displacer adapted for oscillating within said second cylinder; an expansion chamber in communication with said displacer so as to be cooled by said gas at a first extremity of said second cylinder said expansion chamber at said first extremity of said cylinder; the method comprising:driving said piston at a speed such that displacer oscillation is less than 90 degrees out of phase with said piston; and driving said piston at a speed above the resonant frequency of said displacer to cause displacer oscillation to be out of phase with said piston by more than 90 degrees for the generation of heat in said expansion chamber.