Patent ID: 6766652
Filing Date: 2004-07-27
Classification: F25B,F25D,Y02B

Abstract:
A freezer comprising:a cabinet; a first freezer chamber having insulated peripheral walls including a pair of side walls, a rear wall, a top wall and a bottom wall disposed in a top portion of said cabinet; a second freezer chamber having insulated peripheral walls including a pair of side walls, a rear wall, a top wall and a bottom wall disposed in a bottom portion of said cabinet; an upper insulated door hingedly secured to one of said side walls of said first freezer chamber; a lower insulated door hingedly secured to one of said side walls of said second freezer chamber; and a refrigeration unit connected to said freezer which cools said first and second freezer chambers to a substantially uniform temperature between about âˆ’40Â° C. and âˆ’80Â° C., wherein said first and said second freezer chambers are independently controllable and said cabinet further comprises outer vertical doors hingedly secured along said top and bottom portions, respectively and; wherein refigerants R404a and R508b are used in a dual cascade system connected to said first freezer chamber and said second freezer chamber.