Refrigerating Apparatus

Abstract

A refrigerating apparatus ( 10 ) includes a refrigerant circuit ( 11 ) in which a compressor ( 20 ), a radiator ( 14 ), an expander ( 30 ), and a cooler ( 15 ) are connected to each other in order through refrigerant pipes, in which a rotating shaft ( 22 ) of a motor is connected to a compression mechanism ( 21 ) included in the compressor ( 20 ) while a rotating shaft ( 32 ) of a generator ( 33 ) is connected to an expansion mechanism ( 31 ) included in the expander ( 30 ). The refrigerating apparatus ( 10 ) further includes an electric power input mechanism ( 41, 43 ) for allowing the generator ( 33 ) to function as a motor. This secures the operation of the expander ( 30 ) at a start of the apparatus to secure the start of a system, thereby attaining reliable control of the start-up performance at the start.

1 . A refrigerating apparatus comprising: a refrigerant circuit ( 11 ) in which a compressor ( 20 ), a radiator ( 14 ), an expander ( 30 ), and a cooler ( 15 ) are connected to each other in order through refrigerant pipes, in which a rotating shaft ( 22 ) of a motor ( 23 ) is connected to a compression mechanism ( 21 ), which the compressor ( 20 ) includes, while a rotating shaft ( 32 ) of a generator ( 33 ) is connected to an expansion mechanism ( 31 ), which the expander ( 30 ) includes, the refrigerating apparatus further comprising:
 an electric power input mechanism ( 41 ,  43 ) for allowing the generator ( 33 ) to function as a motor ( 23 ).   
   
   
       2 . The refrigerating apparatus of  claim 1 , further comprising:
 a control mechanism ( 45 ) for allowing the electric power input mechanism ( 41 ,  43 ) for the generator ( 33 ) to operate at a start of the expander ( 30 ).   
   
   
       3 . The refrigerating apparatus of  claim 1 , wherein
 the refrigerant circuit ( 11 ) uses carbon dioxide as a refrigerant.