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A CRYOGENIC SCIENTIFIC REFRIGERATION SYSTEM WITH VARIOUS POTENTIAL APPLICATIONS, BUT TYPICALLY USED WITH X-RAY DIFFRACTION APPARATUS FOR THE INVESTIGATION OF MATERIALS/MOLECULAR STRUCTURE. THE SYSTEM CONTAINS NO X-RAY COMPONENTS. A GAS PUMP PROVIDES GAS FLOW FROM AN UNPRESSURISED DEWAR, THROUGH A FLEXIBLE VACUUM INSULATED TRANSFER LINE INTO THE COLDHEAD. ONCE INSIDE THE COLDHEAD, THE LIQUID NITROGEN PASSES THROUGH A HEATER, WHICH EVAPORATES MOST OF THE LIQUID INTO GAS. THE GAS THEN FLOWS OUTWARD ALONG ONE PATH OF THE HEAT EXCHANGER, THROUGH THE TEMPERATURE CONTROLLER, TO ARRIVE AT THE PUMP APPROX 10 KELVIN BELOW ROOM TEMPERATURE. THE GAS THEN FLOWS BACK INTO THE COLDHEAD WHERE IT IS RE-COOLED ALONG THE SECOND PATH OF THE HEAT EXCHANGER. THE GAS TEMPERATURE IS REGULATED BY A HEATER AND A SENSOR BEFORE ENTERING THE ISOTHERMAL NOZZLE AND OUT OVER THE SAMPLE.

A DRY AIR DESKTOP REFRIGERATION UNIT. COOLS COMPRESSED DRY AIR (OR NITROGEN GAS) TO A TEMPERATURE RANGE OF BETWEEN 170 TO 290 KELVIN. THE COOL GAS IS DELIVERED TO THE SAMPLE VIA A VACUUM INSULATED TRANSFER LINE AND DELIVERY NOZZLE. A SECOND STREAM OF DRY AIR (OR NITROGEN GAS) IS DELIVERED AT ROOM TEMPERATURE ACTING AS A SHIELD GAS TO PREVENT ICING OF THE SAMPLE.

VEHICLE POWERED TRUCK REFRIGERATION SYSTEMS. COMPRESSION – TYPE UNIT WHOSE CONDENSERS ARE HEAT EXCHANGERS. UNITS CONSIST OF A COMPRESSOR, A CONDENSER AND AN EVAPORATOR.

VEHICLE MOUNTED REFRIGERATION UNITS FOR USE ON TRUCKS AND TRAILERS. COMPRESSION – TYPE UNIT WHOSE CONDENSERS ARE HEAT EXCHANGERS. UNITS CONSIST OF A COMPRESSOR, A CONSENSER AND AN EVAPORATOR.

PORTABLE FRIDGE FREEZER FOR USE IN VEHICLES SUCH AS CARS, MOTORHOMES, BOATS ETC. RUNS ON 12V/24V DC AND 220V/240V AC AND HAS A TEMPERATE RANGE OF -30°C +10°C. HAS DIGITAL TEMPERATURE PRE-SETTING AND LCD DISPLAY WITH FAILURE PREDICTION SHOW. HAS A HEAVY DUTY ALLOY BODY, LATCHES AND HANDLES WITH ANTI VIBRATION DESIGN FOR HARSH CONDITIONS.