Refrigerating device, refrigerator, compressor, and gas-liguid separator

Abstract

An object is to provide a refrigerating device capable of realizing a high-efficiency operation in a case where there is disposed, in a refrigerating cycle, a compressor having: a plurality of heat sinks which function in different temperature zones; and an intermediate-pressure portion. The refrigerating device comprises: the compressor having the intermediate-pressure portion; and a radiator connected to a discharge side of the compressor, a refrigerant pipe on an outlet side of the radiator is branched, one of the branched refrigerant pipes is provided with a first heat absorbing unit including a first pressure reducing section and a first heat sink, and the other refrigerant pipe is provided with a second heat absorbing unit including a second pressure reducing section and a second heat sink. The one refrigerant pipe is connected to the intermediate-pressure portion of the compressor, and the other refrigerant pipe is connected to a suction portion of the compressor on a low-pressure side of the intermediate-pressure portion.

1 . A refrigerating device comprising: a compressor having an intermediate-pressure portion; and a radiator connected to a discharge side of the compressor, 
 the radiator including a refrigerant pipe which is branched on an outlet side of the radiator, one of the branched refrigerant pipes being provided with first heat absorbing means including first pressure reducing means and a first heat sink, the other branched refrigerant pipe being provided with second heat absorbing means including second pressure reducing means and a second heat sink,    wherein the one refrigerant pipe is connected to the intermediate-pressure portion of the compressor, and the other refrigerant pipe is connected to a suction portion of the compressor on a low-pressure side of the intermediate-pressure portion.    
   
   
       2 . The refrigerating device according to  claim 1 , further comprising: 
 a heat exchanger via which heat is exchangeable between a refrigerant discharged from the first heat sink and a refrigerant which is discharged from the radiator and which is to be branched.    
   
   
       3 . The refrigerating device according to  claim 1  or  2 , wherein the first heat absorbing means and the second heat absorbing means function in different temperature zones.  
   
   
       4 . The refrigerating device according to  claim 3 , wherein the second heat absorbing means functions in a temperature zone which is lower than that of the first heat absorbing means.  
   
   
       5 . A refrigerator comprising: 
 the refrigerating device according to  claims 1  to  4 .    
   
   
       6 . The refrigerator according to  claim 5  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.    
   
   
       7 . The refrigerating device according to  claims 1  to  4 , and the refrigerator according to  claim 5  or  6 , wherein carbon dioxide is used as a refrigerant.  
   
   
       8 . A compressor comprising: 
 an electromotive element; and    a compression chamber which is driven by the electromotive element to compress a fluid,    the electromotive element and the compression chamber being disposed in a sealed container,    wherein the compression chamber includes: an introducing port for introducing the fluid into the compression chamber; and first and second discharge ports for discharging the compressed fluid,    the first discharge port is provided with a first discharge valve which is opened in a case where the fluid compressed in the compression chamber reaches a first pressure, and    the second discharge port is provided with a second discharge valve which is opened at a second pressure which is higher than the first pressure.    
   
   
       9 . The compressor according to  claim 8 , wherein the fluid is an oil-containing refrigerant.  
   
   
       10 . The compressor according to any one of claims  8  and  9 , wherein the compression element is constituted of: 
 a front-stage compression element; and a rear-stage compression element which further compresses the refrigerant compressed by the front-stage compression element,    the compression chamber of the front-stage compression element is provided with the introducing port, the first discharge port, the first discharge valve, the second discharge port, and the second discharge valve, and    the second discharge valve is opened at a pressure which is higher than that of the refrigerant discharged from the rear-stage compression element.    
   
   
       11 . The compressor according to  claim 10 , wherein the second discharge valve is brought into contact with the refrigerant in the compression chamber and the refrigerant discharged from the rear-stage compression element.  
   
   
       12 . A refrigerating device comprising: 
 the compressor according to  claim 8;     a radiator connected to a discharge side of the compressor;    first heat absorbing means connected to one of branched refrigerant pipes on an outlet side of the radiator and including first pressure reducing means and a first heat sink; and    second heat absorbing means connected to the other branched refrigerant pipe and including second pressure reducing means and a second heat sink,    the one refrigerant pipe being connected to an intermediate-pressure portion of the compressor, the other refrigerant pipe being connected to a suction port of the compressor on a low-pressure side of the intermediate-pressure portion.    
   
   
       13 . The refrigerating device according to  claim 12 , wherein a high-pressure side of a refrigerating cycle is operated in a supercritical state.  
   
   
       14 . A refrigerator comprising: 
 the refrigerating device according to any one of claims  12  and  13 .    
   
   
       15 . A refrigerating device comprising: 
 compression means including a front-stage compression element and a rear-stage compression element;    a radiator connected to a discharge side of the compression means;    first heat absorbing means connected to one of branched refrigerant pipes on an outlet side of the radiator and including first pressure reducing means and a first heat sink;    second heat absorbing means connected to the other branched refrigerant pipe and including second pressure reducing means and a second heat sink;    changeover means for selecting circulation of a refrigerant to the first heat absorbing means and the second heat absorbing means; and    control means for controlling a compressing operation of the compression means based on information of the changeover means,    the refrigerant pipe on the outlet side of the first heat absorbing means being connected between the discharge side of the front-stage compression element and a suction port of the rear-stage compression element, the refrigerant pipe on the outlet side of the second heat absorbing means being connected to a suction port of the front-stage compression element,    the control means stopping the compressing operation of the front-stage compression element in a case where the refrigerant is circulated in the first heat absorbing means and the circulation of the refrigerant to the second heat absorbing means is interrupted.    
   
   
       16 . The refrigerating device according to  claim 15 , wherein the compression means is constituted of two compressors, one of the two compressors is operated as the front-stage compression element, the other compressor is operated as the rear-stage compression element, and 
 the control means stops the operation of the one compressor in a case where the refrigerant is circulated in the first heat absorbing means and the circulation of the refrigerant to the second heat absorbing means is interrupted.    
   
   
       17 . The refrigerating device according to  claim 15 , wherein the compression means contains the front-stage compression element and the rear-stage compression element in one sealed container, each of the compression elements is constituted of a rotary multistage compressor including a vane and a roller and operating via the same rotation shaft, 
 the multistage compressor includes contact prevention means for preventing the vane of the front-stage compression element from being brought into contact with the roller, and    the control means operates the contact prevention means to prevent the vane of the front-stage compression element from being brought into contact with the roller in a case where the refrigerant is circulated in the first heat absorbing means and the circulation of the refrigerant to the second heat absorbing means is interrupted.    
   
   
       18 . The refrigerating device according to  claim 15 , wherein the compression means contains the front-stage compression element and the rear-stage compression element in one sealed container, 
 the front-stage compression element operates via a first rotation shaft, the rear-stage compression element operates via a second rotation shaft,    the first rotation shaft is attached to driving means, the first rotation shaft is connected to the second rotation shaft via a clutch mechanism, and    the control means disconnects the second rotation shaft from the first rotation shaft via the clutch mechanism in a case where the refrigerant is circulated in the first heat absorbing means and the circulation of the refrigerant to the second heat absorbing means is interrupted.    
   
   
       19 . The refrigerating device according to any one of  claims 15  to  18 , wherein carbon dioxide is used as the refrigerant.  
   
   
       20 . The refrigerating device according to any one of  claims 15  to  19 , wherein a high-pressure side of a refrigerating cycle is operated in a supercritical state.  
   
   
       21 . A refrigerator comprising: 
 the refrigerating device according to any one of  claims 15  to  20 .    
   
   
       22 . A compressor comprising: 
 a vane;    a roller; and    contact prevention means for preventing the vane from being brought into contact with the roller.    
   
   
       23 . The compressor according to  claim 22 , wherein the contact prevention means includes: a magnet attached to the vane; and an electromagnet capable of generating a magnetic force which reacts against the magnet or which attracts the magnet.  
   
   
       24 . The compressor according to  claim 23 , wherein the magnetic force is generated so that the electromagnet reacts against the magnet in a case where a refrigerant compressing operation is performed, and the magnetic force is generated so that the electromagnet attracts the magnet in a case where the refrigerant compressing operation is stopped.  
   
   
       25 . A compressor containing a front-stage compression element and a rear-stage compression element in one sealed container, 
 the front-stage compression element operating via a first rotation shaft, the rear-stage compression element operating via a second rotation shaft,    the first rotation shaft being attached to driving means, the first rotation shaft being connected to the second rotation shaft via a clutch mechanism.    
   
   
       26 . The compressor according to  claim 25 , wherein the clutch mechanism disconnects the second rotation shaft from the first rotation shaft in a case where a compressing operation of the front-stage compression element is stopped, and a compressing operation of the rear-stage compression element is performed.  
   
   
       27 . A refrigerating device comprising a refrigerating cycle including: a compressor; a radiator connected to a discharge side of the compressor; first pressure reducing means connected to an outlet side of the radiator; second pressure reducing means disposed in series to the first pressure reducing means; and a heat sink connected to an outlet side of the second pressure reducing means, 
 wherein adsorbing means for adsorbing a water content from a refrigerant is disposed between the outlet side of the first pressure reducing means and an inlet side of the second pressure reducing means.    
   
   
       28 . A gas-liquid separator comprising: 
 a container into which a mixed refrigerant of a gas and a liquid is introduced and in which the refrigerant is separated into the gas and the liquid;    an introducing tube for introducing the refrigerant into the container;    a first outlet tube out of which the gas refrigerant separated in the container flows; and    a second outlet tube out of which the liquid refrigerant separated in the container flows, the container being provided with an adsorbing section for adsorbing a water content from the refrigerant.    
   
   
       29 . A refrigerating device comprising a refrigerating cycle including: a compressor; a radiator connected to a discharge side of the compressor; first pressure reducing means connected to an outlet side of the radiator; second pressure reducing means disposed in series to the first pressure reducing means; and a heat sink connected to an outlet side of the second pressure reducing means, 
 wherein the gas-liquid separator according to  claim 28  is disposed between an outlet side of the first pressure reducing means and an inlet side of the second pressure reducing means.    
   
   
       30 . The refrigerating device according to  claim 29 , wherein the compressor has an intermediate-pressure portion, and 
 the first outlet tube of the gas-liquid separator is connected to the intermediate-pressure portion.    
   
   
       31 . The refrigerating device according to any one of claims  27 ,  29 , and  30 , wherein a high-pressure part of the refrigerating cycle is operated at a supercritical pressure.  
   
   
       32 . The refrigerating device according to any one of claims  27 ,  29 ,  30 , and  31 , wherein carbon dioxide is used as the refrigerant.  
   
   
       33 . A refrigerator comprising: 
 the refrigerating device according to any one of claims  27 ,  29 ,  30 ,  31 , and  32 .