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(11) | EP 1 762 793 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Closed type air cycle refrigerator and cooling method using the same |
| (57) A closed type refrigerator includes a compressor (3) and an expansion turbine (4)
coupled to ends of a rotation shaft of a motor (2), respectively; a refrigerant circulating
pipe; a first heat exchanger (5) provided in a portion of the refrigerant circulating
pipe from an outlet of the compressor to an inlet of the expansion turbine; and a
second heat exchanger (6) provided in a portion of the refrigerant circulating pipe
from the first heat exchanger to the inlet of the expansion turbine. The compressor
compresses the refrigerant, and the first heat exchanger carries out heat exchange
between the compressed refrigerant and atmosphere to generate a first cooled refrigerant.
The second heat exchanger carries out heat exchange between the first cooled refrigerant
and a second cooled refrigerant to generate a third cooled refrigerant, and the expansion
turbine adiabatically expands the third cooled refrigerant to generate the second
cooled refrigerant, which is used to cool a refrigeration storage (7) and supplied
to the inlet of the compressor. The refrigerant is dehumidified.
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