Refrigerating device and refrigerator

Abstract

An object is to provide a refrigerating device capable of realizing a high-efficiency operation and a refrigerator provided with the refrigerating device in a case where a compressor having an intermediate-pressure portion is applied, the refrigerating device comprises a compressor having an intermediate-pressure portion; a radiator connected to the compressor on a discharge side; and a heat absorbing unit connected to the radiator on an outlet side and including a pressure reducing unit and a heat sink, the heat absorbing unit on the outlet side is connected to a suction portion having a pressure which is lower than that of the intermediate-pressure portion of the compressor, a refrigerant pipe of the radiator on the outlet side is branched, one refrigerant pipe is connected to the heat absorbing unit, the other refrigerant pipe is connected to the intermediate-pressure portion of the compressor, and provided with a pressure reducing mechanism and a heat exchanger, and this heat exchanger is constituted in such a manner that heat is exchangeable between a refrigerant of the one refrigerant pipe and a refrigerant of the other refrigerant pipe.

1 . A refrigerating device comprising: a compressor having an intermediate-pressure portion; a radiator connected to the compressor on a discharge side; and heat absorbing means connected to the radiator on an outlet side and including pressure reducing means and a heat sink, the heat absorbing means on the outlet side being connected to a suction portion having a pressure which is lower than that of the intermediate-pressure portion of the compressor, 
 wherein a refrigerant pipe of the radiator on the outlet side is branched, one refrigerant pipe is connected to the heat absorbing means, the other refrigerant pipe is connected to the intermediate-pressure portion of the compressor, and provided with a pressure reducing mechanism and a heat exchanger, and this heat exchanger is constituted in such a manner that heat is exchangeable between a refrigerant of the one refrigerant pipe and a refrigerant of the other refrigerant pipe.    
   
   
       2 . The refrigerating device according to  claim 1 , further comprising: 
 a first heat exchanger constituted in such a manner that the refrigerant between the heat absorbing means and the suction portion of the compressor is heat-exchangeable with the refrigerant of the one refrigerant pipe extended from the heat exchanger.    
   
   
       3 . The refrigerating device according to  claim 1  or  2 , wherein the heat absorbing means comprises: first heat absorbing means including first pressure reducing means and a first heat sink; and second heat absorbing means including second pressure reducing means disposed in parallel with the first heat absorbing means and a second heat sink, and 
 the first and second heat absorbing means are combined with each other on the outlet side, and connected to the suction portion of the compressor.    
   
   
       4 . The refrigerating device according to  claim 3 , further comprising: 
 a first heat exchanger for exchanging heat between the refrigerant discharged from the first heat sink and the refrigerant of the one refrigerant pipe between the heat exchanger and the first pressure reducing means; and    a second heat exchanger for exchanging heat between the refrigerant discharged from the second heat sink and the refrigerant of the one refrigerant pipe between the heat exchanger and the second pressure reducing means.    
   
   
       5 . The refrigerating device according to  claim 3 , further comprising: 
 a fourth heat exchanger for exchanging heat between the refrigerant of the one refrigerant pipe extended from the heat exchanger and the refrigerant discharged from the first heat sink, the one refrigerant pipe extended from the fourth heat exchanger being connected to the first and second heat absorbing means; and    a fifth heat exchanger for exchanging heat between the refrigerant of the one refrigerant pipe extended from the fourth heat exchanger and that is connected to the second heat absorbing means and the refrigerant discharged from the second heat sink,    the refrigerant pipe extended from the first heat sink and the fourth heat exchanger being combined with the refrigerant pipe extended from the second heat sink and the fifth heat exchanger, the combined refrigerant pipe being connected to the suction portion of the compressor.    
   
   
       6 . The refrigerating device according to  claims 3  to  5 , wherein the first and second heat absorbing means function in selectively different temperature zones.  
   
   
       7 . The refrigerating device according to  claim 6 , wherein the second heat absorbing means functions in a temperature zone which is lower than that of the first heat absorbing means.  
   
   
       8 . A refrigerator comprising: 
 the refrigerating device according to  claims 1  to  7 .    
   
   
       9 . The refrigerator according to  claim 8 , further comprising: a refrigerating room; and a freezing room operated at a temperature which is lower than that of the refrigerating room, 
 the refrigerating room being cooled by the first heat absorbing means, the freezing room being cooled by the second heat absorbing means.    
   
   
       10 . The refrigerator according to  claim 9 , wherein the refrigerant is circulated in the first and second heat absorbing means in a case where the refrigerating room and/or the freezing room is at a temperature which is not less than a predetermined temperature.  
   
   
       11 . The refrigerating device according to  claims 1  to  7  and the refrigerator according to  claims 8  to  10 , wherein carbon dioxide is used as a refrigerant.