Energy efficient insulation system for refrigerator/freezer

A refrigeration appliance comprising:

• an external cabinet;
• an interior liner, spaced inwardly of said external cabinet to form at least two cubical refrigeration compartments, each compartment having its own access door through said external cabinet;
• vacuum insulation panels being positioned in a space between said cabinet and said liner to surround said first compartment on all five external sides thereof;
• a first evaporator for said first compartment, said first evaporator operating at a first pressure level;
• a second evaporator for said second compartment, said second evaporator operating at a pressure level higher than said first pressure level;
• and
• control means operative to sequentially operate said evaporators, such that only one evaporator provides cooling at any given time.

A refrigeration appliance comprising:

• an external cabinet;
• an interior liner, spaced inwardly of said external cabinet to form at least two refrigeration compartments, each compartment having its own access door;
• thermal insulation being positioned in a space between said cabinet and said liner surrounding said compartments;
• said insulation surrounding said first compartment having a first level of thermal resistance and said insulation surrounding said second compartment having a second, lower level of thermal resistance;
• a first evaporator for said first compartment, said first evaporator operating at a first pressure level;
• a second evaporator operating at a pressure level higher than said first pressure level;
• and
• control means operative to sequentially operate said evaporators, such that only one evaporator provides cooling at any given time.