초록 ▼

A self-contained cooler/freezer apparatus for carrying items in a frozen or refrigerated environment. The apparatus comprises a first insulated container which is divided into two portions: a first storage portion where items that are incompatible with a carbon dioxide environment are stored; and, a

A self-contained cooler/freezer apparatus for carrying items in a frozen or refrigerated environment. The apparatus comprises a first insulated container which is divided into two portions: a first storage portion where items that are incompatible with a carbon dioxide environment are stored; and, a second portion for storing a solid coolant, namely, solid carbon dioxide or dry ice. The items are placed within a second nitrogen enriched container and this second container is placed within the first storage portion of the first insulated container. Within a short period of time, the dry ice starts to sublimate, thereby forming cold gaseous carbon dioxide which fills the volume of the apparatus. A fan is used to circulate the gaseous carbon dioxide throughout the insulated container thereby removing heat from the first portion and the heat conducted out of the nitrogen enriched container and rejecting it to the dry ice in the coolant compartment, thereby cooling the first portion of the insulated container and the nitrogen enriched container stowed therein. The cold gaseous carbon dioxide is circulated throughout the insulated container via gas ducts located within the walls of the insulated container. A thermostatic controller actuates the fan based upon temperature readings from thermocouples located within the nitrogen enriched container.

대표청구항 ▼

A self-contained cooler/freezer apparatus for holding and preserving items which need to be stored at refrigerated or frozen temperatures, said apparatus comprising: (a) a first insulated container having a first storage compartment and a second coolanat compartment insulated from said first storage

A self-contained cooler/freezer apparatus for holding and preserving items which need to be stored at refrigerated or frozen temperatures, said apparatus comprising: (a) a first insulated container having a first storage compartment and a second coolanat compartment insulated from said first storage compartment for holding cargon dioxide in solid form, a first gas passageway connecting said second coolant compartment to said first storage compartment, a second gas passageway connecting said first storage compartment to said second coolant compartment; (b) a second container having an enclosed environment for storing said items therin, said second container placed in said first storage compartment of said first insulated container; (c) at least one temperature sensing device mounted within said apparatus for sensing current temperatures within said second container; (d) means of circulating gaseous carbon dioxide fromed by the sublimation or said solid carbon dioxide to said first storage compartment from said second coolant compartment, and (e) control means for maintaing the temperture within said first storage compartment and said second container at a predetermined value, said control means including means for determining the difference between a courrent sensed temperature of said apparatus with said predetermined temperature value and enabling said circulating means to circulate an amount of said gaseous carbon dioxide in accordance with said temperature difference.