Cold compartment temperature stabilization in refrigerators and freezers
A selected temperature is stabilized within the interior of a cold compartment of a refrigerator or freezer wherein the selected temperature is effected by a refrigeration system operated in cycles of operation comprised of ON periods and OFF periods. A lining is extended along the perimeter of the interior of the compartment, exposed to the interior, the lining being constructed of a material having a combination of thermal conductivity and thermal mass enabling the conduct of heat into the interior of the compartment during the ON periods and the absorption of heat from the interior of the compartment during the OFF periods, whereby the temperature within the interior of the compartment essentially is stabilized at the selected temperature during cyclical operation of the refrigeration system.
1. An apparatus for stabilizing a selected temperature within the interior of a cold compartment wherein the selected temperature is effected by a refrigeration system operated to remove heat from the interior of the cold compartment in cycles of operation comprised of ON periods, during which heat is removed from the interior of the cold compartment, and OFF periods, during which heat accumulates in the interior of the cold compartment, the cold compartment having a surrounding wall including side walls extending between front and rear walls, the apparatus comprising:
a lining having an extent for juxtaposition with and extending along the surrounding wall, exposed to the interior of the cold compartment, the lining being dimensioned and configured to be juxtaposed with and extend over the side walls of the cold compartment from adjacent one to adjacent the other of the front and rear walls;
the lining being constructed of a first layer of a material comprised of a metal of high thermal conductivity, the first layer having an extent for placement contiguous with the interior of the cold compartment, coextensive with the side walls of the surrounding wall of the cold compartment, and a second layer of a material comprised of a metal of high thermal mass contiguous with the first layer over essentially the entire extent of the first layer and located for placement between the first layer and the surrounding wall of the cold compartment, the first and second layers being coextensive in contiguity with one another throughout the entire extent of the lining, such that during the OFF periods heat will be conducted from the interior of the cold compartment, through the first layer and into the second layer to be absorbed within the second layer, and during the ON periods heat will be conducted from the second layer, through the first layer and into the interior of the cold compartment to be removed by the refrigeration system, whereby the temperature within the interior of the cold compartment essentially will be stabilized at the selected temperature during cyclical operation of the refrigeration system.
2. The apparatus of claim 1 wherein the material of the first layer comprises aluminum.
3. The apparatus of claim 2 wherein the material of the second layer comprises steel.
4. The apparatus of claim 1 wherein the material of the first layer is comprised of aluminum and the material of the second layer is comprised of a metal selected from the group consisting of galvanized steel and stainless steel.
5. A method for stabilizing a selected temperature within the interior of a cold compartment wherein the selected temperature is effected by a refrigeration system operated to remove heat from the interior of the cold compartment in cycles of operation comprised of ON periods, during which heat is removed from the interior of the cold compartment, and OFF periods, during which heat accumulates in the interior of the cold compartment, the cold compartment having a surrounding wall, including side walls extending between front and rear walls, the method comprising:
placing a lining in juxtaposition with the surrounding wall, and extending the lining along the surrounding wall such that the lining is exposed to the interior of the cold compartment; and
constructing the lining of a first layer of a material comprised of a metal of high thermal conductivity and having an extent such that upon placement contiguous with the interior of the cold compartment, the first layer extends coextensive with the side walls of the surrounding wall of the cold compartment, from adjacent one to adjacent the other of the front and rear walls, and a second layer of a material comprised of a metal of high thermal mass contiguous with the first layer over essentially the entire extent of the first layer and located for extending between the first layer, and the surrounding wall of the cold compartment upon placement of the liner contiguous with the interior of the cold compartment, with the first and second layers coextensive in contiguity with one another throughout the entire extent of the lining, such that during the OFF periods heat is conducted from the interior of the cold compartment, through the first layer and into the second layer and absorbed within the second layer, and during the ON periods heat is conducted from the second layer through the first layer and into the interior of the cold compartment and removed by the refrigeration system, whereby the temperature within the interior of the cold compartment essentially is stabilized at the selected temperature during cyclical operation of the refrigeration system.
6. The method of claim 5 including constructing the first layer of a metal comprising aluminum.
7. The method of claim 6 including constructing the second layer of a metal comprising steel.
8. The method of claim 5 including constructing the first layer of a metal comprising aluminum, and constructing the second layer comprised of a metal selected from the group consisting of galvanized steel and stainless steel.