초록 ▼

A sublimation refrigerator employs a thermally insulated outer housing having a pivotable top. A smaller insulated dry ice chamber is adapted to be supported centrally within the container as is a separate insulated freezer compartment having a removable top. A first set of serpentine cooling coils

A sublimation refrigerator employs a thermally insulated outer housing having a pivotable top. A smaller insulated dry ice chamber is adapted to be supported centrally within the container as is a separate insulated freezer compartment having a removable top. A first set of serpentine cooling coils are supported in the interior side walls of the main insulated container and in the side walls of the freezer compartment. One end of each of these coils connects to the dry ice chamber. A bubble type visual flow indicator having a transparent window is supported on the exterior of the main container. The output ends of both the freezer coil and the cooler coil connect to the visual indicator through manually adjustable flow control valves. The output of the visual indicator vents to atmosphere. In normal use the valve at the output of the freezer coil is opened allowing free flow of gas sublimating from the dry ice through the freezer coil so that a very low temperature is attained within the freezer. The valve at the output of the cooler coil is then used to control the flow to attain a desired cooler temperature and the freezer valve may be temporarily closed allowing the visual indicator to be used for adjustment of the cooler coil. Since both freezer and cooler coils are fed simultaneously control of each area is by the valves, and closing either one will allow all gases to go through a desired area.

대표청구항 ▼

A sublimation refrigerator, comprising: an insulated outer container including a cover movable between an open position and a closed position; an inner container for a sublimating solid adapted to be disposed within the outer container, the inner container having a removable cover; a freezer compart

A sublimation refrigerator, comprising: an insulated outer container including a cover movable between an open position and a closed position; an inner container for a sublimating solid adapted to be disposed within the outer container, the inner container having a removable cover; a freezer compartment supported within the outer container and having a movable cover; a first elongated cooling coil extending along the interior side walls of the outer container and having one of its ends connected to the interior of the container for the sublimating solid; a second elongated cooling coil disposed within said freezer compartment and having its input ends connected to the interior of the container for the sublimating solid and its output end vented to the atmosphere; and manually adjustable restricting valve means connecting the output end of the first coil to the exterior of the outer container whereby a sublimating solid may be disposed within the inner container, the valve adjusted so as to control the relative flow of gas generated by sublimation of the solid through said first and second coils, and the temperature within the freezer compartment may be maintained at a lower value than the temperature within the outer container exteriorly of the freezer compartment.