초록 ▼

Apparatus for cooling and deep freezing samples of biological material. The cooling zone, containing the closed plastic vessels with the samples, is enclosed between two parallel, plate-like layered cooling elements. The latter are made of at least two cooling layers containing blocks of Peltier ele

Apparatus for cooling and deep freezing samples of biological material. The cooling zone, containing the closed plastic vessels with the samples, is enclosed between two parallel, plate-like layered cooling elements. The latter are made of at least two cooling layers containing blocks of Peltier elements, alternating with plates of a heat-conducting metal, preferably aluminium. The disposition with several layers of Peltier elements increases the temperature difference between the inner space and environment. The innermost layer of the cooling elements is a metal plate as well; the outermost layer is a metal plate with means for external cooling, such as channels for circulating water or cooling ribs. The cooling zone is either a metal block with cavities to receive the sample vessels or simply the free space between the two innermost plates of the cooling elements, into which the vessels can be inserted. In one special design the metal block is an exchangeable module or cassette to be inserted into the cooling space. All parts, except the plates cooled externally, are thermally insulated; the cooling space is sealed against humidity by an insulated lid. The apparatus is controlled by a programmable electronic unit, by which a temperature program for the freezing process can be followed. The signals are given by temperature sensors in the cooling zone. In a preferred design, the freezing apparatus, the electronic control unit and the power supply are combined together in portable housing box.

대표청구항 ▼

Apparatus for cooling and deep freezing samples of biological material enclosed in vessels, consisting of two parallel plate-like cooling elements which between them confine a cooling zone, characterized in that each of said cooling elements is a layered structure of at least two cooling layers stac

Apparatus for cooling and deep freezing samples of biological material enclosed in vessels, consisting of two parallel plate-like cooling elements which between them confine a cooling zone, characterized in that each of said cooling elements is a layered structure of at least two cooling layers stacked onto one another alternatingly with metal plates of high thermal conductivity, each of said cooling layers consisting of one or more blocks of Peltier elements arranged thermally in parallel, whereby the metal plates, which constitute the outer boundaries of the arrangement, are equipped with means for external cooling.