Abstract:
In order to improve heat transfer in freezing processes, goods that are to be refrigerated (12) and a pre-refrigerated body (3, 4) with a high heat capacity are pressed against each other. Heat transfer is improved by means of a device (11) comprising a holding device allowing the goods that are to be refrigerated (12) to be held in such a way that they remain substantially deformation-free and enabling direct contact between the cooling liquid and the goods to be refrigerated (12). Preferably, vertically running channels (17) for the cooling liquid are arranged in between the holding device and the items that are to be refrigerated (12).
Abstract:
A long rectangular slotted-sheath construct (10) generally referred to as a "cassette", functions both in the positioning of and the treating of the individual, cell-containing primary units (1) held therein. The invention also embraces a cooling and thawing system (30) within which primary containers of cells, with or without a surrounding cassette, may be cooled, stored and rewarmed.
Abstract:
A device for cryoprotecting thermolabile products. A container (20) receives an annular rack (40) which is sealed by an enclosure (60). The enclosure (60) includes an outer stationary toroid (70) and a rotatable core (90). A robotic arm (160) is adapted to move and is supported by the core (90). The robotic arm (160) accesses an interior of the enclosure (60). An access portal (80) allows removal and placement of thermolabile products constrained by a holder (150). The robotic arm (160) accesses product and holder (150) and embarks upon controlled freezing of the product and its location in the rack (40) until subsequent retrieval. A computer controls the rate of freezing and stores in memory the location of all of the stored products. The robotic arm (160) reads the product in storage to assure the correct product is being accessed.
Abstract:
A chamber for freeze-drying by cryosorption with liquid nitrogen cooling in a Dewar vessel (1), in which the chamber (8-10, 18, 19) is largely in the Dewar vessel (1), preferably in its neck, and its preferably cylindrical outer wall (9) is of metal, the lower edge of which is vacuumtightly secured to lower edge of a metal and preferably symmetrical in rotation component (8). The plane underside of the metal component (8) has a contact surface (25) which corresponds to the equally plane complementary surface (7) on the top of a body around which flows liquid nitrogen and is cooled by this component, the component (8) having a chamber (30) to accept the dessiccant (31) for cryosorption, e.g. a molecular sieve, and a connection (45) with the drying chamber (34). The upper edge of the metal wall (9) or a ring (10) vacuumtightly secured thereto is outside the Dewar vessel (1) and is therefore at approximately room temperature and has a vacuum connector (14) for the connection of commercially available vacuum components, and the aperture on the upper side of the ring (10) can be vacuumtightly sealed preferably by a commercially available O-ring together with a cover (19).
Abstract:
A method and a device are provided to cool an oxide superconductor material using liquid nitrogen to a temperature lower than its boiling point. There are two kinds of cooling, i.e., cooling under reduced pressure and cooling under ordinary pressure. The reduced-pressure cooling device has a coil-accommodating chamber which is a reduced-pressure vessel. The pressure in the coil-accommodating chamber is reduced by a pressure-reducing pump, whereby the liquid nitrogen assumes a temperature of the triple point. The ordinary-pressure cooling device has a cooling portion of the refrigerator in the coil-accommodating chamber, and in which the liquid nitrogen is cooled down to its melting point.
Abstract:
Workpieces (e.g. valve seats, valve guides, or cylinder liners for an internal combustion engine) are chilled as they are supplied to a station on an assembly line (50) using a feeder/chiller that includes a passage (32) to convey workpieces downwardly from a location at the top of the passage to an assembly line station (50). The chiller/feeder is fed cryogen from a reservoir of liquid cryogen. Because cryogen fluid (chilled nitrogen vapor) entering the passage (32) is denser than air, downward flow of cryogen fluid must be restricted. For example, the passage (32) includes a constriction (34) below the position at which cryogen is fed to the passage (32). The constriction (34) is configured and sized to allow workpieces to move through the constriction (34), yet the constriction (34) is small enough to restrict the downward flow of cryogenic fluid when a workpiece is positioned in the constriction (34).
Abstract:
The inventive device (10) comprises a channel defined by a bottom (12) and side walls (14) and having an inlet end (16) and an outlet end (18) for the flow of a refrigerant. Underneath the bottom (12), there is provided transversely between the side walls (14) an elongate first space (20). Substantially underneath the bottom (12) and in association with the inlet end (16) of the channel, an elongate second space (22) is provided parallel to the first space (20). Between the first and the second space, at least one opening is so provided that a component of a flow rotating in the first space is guided substantially tangentially out of the first space (20) and into the second space (22). The refrigerant therein is caused to rotate about the longitudinal axis of the second space, the second space being so connected to the inlet end (16) of the channel that a component of the flow rotating in the second space is guided substantially tangentially out of the second space (22) and in over the bottom (12) so as to form a homogeneous flow of refrigerant in the channel.
Abstract:
A refrigerated chamber comprises, inside its metal wall (24/24') and a foam insulating layer (39), a sheet metal tank (38'/40'), in which, depending on the level of filling with liquid nitrogen, the various compartments of the tank divided by separations (72a/72a', 81/81') of different height are filled with LN2, so that different cooling powers are available for the varying temperature ranges between the ambient temperature and the temperature of the liquid nitrogen; in this way one avoids an excessive consumption of nitrogen. The filling with LN2 is effected from a separating tank (38'/40'/75/75') by means of a horizontal small-diameter pipe (73), which during operation of the chamber, is always exposed to and cooled by liquid nitrogen. The nitrogen in the form of a sweeping gas emerging in a boiling state from the tank (38'/40') and guided through the cutting space (41') can be heated up by a heating plate (67'/69') fixed to the sheet metal deflectors (48/48'). Arrangements relate inter alia to a cooled receiving surface (85) and a simplified chamber assembly having a high degree of stability (89 to 98).
Abstract:
Provided is a degassing apparatus having a fluid flow surface positioned within a tank and configured for decreasing the velocity of the fluid flowing through the tank; a cryogen fluid cooling system including the degassing apparatus positioned in fluid communication with a cryogen injector of the system; and a direct cryogen fluid cooling method including flowing fluid containing cryogen into a degassing apparatus for decreasing a velocity of and for removing cryogen gas from the flowing fluid.
Abstract:
An instant freezer apparatus able to freeze consumable fluids and food having a freezing point lower than water is disclosed. The apparatus and method of the present invention is directed to a freezer typically able to instantly freeze consumable fluids and food without altering their chemical compositions. The instant freezer apparatus generally comprises a main frame and a removable freezing module. The apparatus may further comprise a freezing fluid injection system such as a liquid carbon dioxide tank or a liquid nitrogen tank fluidly connected to the main frame.