Patent ID: 7340918
Filing Date: 2008-03-11
Classification: F25B

Abstract:
1. In combination with a refrigeration system having a heat exchanger and a fluid media disposed therein, electrical powering means operatively connected to the heat exchanger for selectively controlled heating of the fluid media; and actuator means operatively connected to said electrical powering means for selectively controlled compression and expansion of the fluid media said actuator means including: a casing; a body of magnetostrictive material enclosed within said casing; electromagnetic coil means operatively connected to the electrical powering means for establishment of a magnetic field within the casing to which the body of magnetostrictive material is exposed; a diaphragm attached to the casing; and piston means within the casing between the diaphragm and said body of magnetostrictive material for selectively controlled deformation of the diaphragm to thereby effect said compression and expansion of the fluid media within the refrigeration system.