Cooling apparatus with low compression load

Abstract

The object of this invention is to provide a cooling apparatus with low compression load. This cooling apparatus consists of an expansion unit for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulates refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using the phase change of the refrigerant. In an embodiment, the apparatus ( 100 ) is designed such that the refrigerant from the outdoor unit ( 160 ) passes through a heat exchanging and evaporating unit ( 110 ) prior to flowing into the expansion unit ( 120 ), with the refrigerant from the evaporating unit ( 110 ) partially flowing into a sub-expansion unit ( 130 ) to become low temperature, low pressure bypassed refrigerant. The bypassed refrigerant from the sub-expansion unit ( 130 ) passes through the evaporating unit ( 110 ) prior to flowing into the compressor ( 150 ).

1 . A cooling apparatus, comprising an expansion unit used for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor used for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulating the refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using a phase change of the refrigerant, wherein 
 the refrigerant from the outdoor unit passes through a heat exchanging and evaporating unit prior to flowing into said expansion unit, with the refrigerant from said heat exchanging and evaporating unit partially flowing into a sub-expansion unit to become low temperature, low pressure bypassed refrigerant, the bypassed refrigerant flowing from the sub-expansion unit passing through the heat exchanging and evaporating unit prior to flowing into said compressor.    
     
     
         2 . The cooling apparatus according to  claim 1 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units arranged in a parallel arrangement or a series arrangement.  
     
     
         3 . The cooling apparatus according to  claim 1 , wherein said sub-expansion unit comprises two or more sub-expansion units arranged in a parallel arrangement or a series arrangement.  
     
     
         4 . The cooling apparatus according to  claim 1 , wherein said compressor comprises a two-stage compressor.  
     
     
         5 . A cooling apparatus, comprising an expansion unit used for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor used for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulating the refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using a phase change of the refrigerant, wherein 
 the refrigerant from said outdoor unit passes through a heat exchanging and evaporating unit prior to flowing into said expansion unit, with the refrigerant from said heat exchanging and evaporating unit partially flowing into a sub-expansion unit to become low temperature, low pressure bypassed refrigerant, and both the bypassed refrigerant flowing from the sub-expansion unit and the refrigerant flowing from the indoor unit passing through the heat exchanging and evaporating unit prior to flowing into said compressor.    
     
     
         6 . The cooling apparatus according to  claim 5 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units arranged in a parallel arrangement or a series arrangement.  
     
     
         7 . The cooling apparatus according to  claim 5 , wherein said sub-expansion unit comprises two or more sub-expansion units arranged in a parallel arrangement or a series arrangement.  
     
     
         8 . The cooling apparatus according to  claim 5 , wherein said compressor comprises a two-stage compressor.  
     
     
         9 . A cooling apparatus, comprising an expansion unit used for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor used for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulating the refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using a phase change of the refrigerant, wherein 
 the refrigerant from said outdoor unit passes through a heat exchanging and evaporating unit prior to flowing into said expansion unit, with the refrigerant from said heat exchanging and evaporating unit partially flowing into a sub-expansion unit to become low temperature, low pressure bypassed refrigerant, and both the bypassed refrigerant flowing from the sub-expansion unit and passing through the heat exchanging and evaporating unit and the refrigerant flowing from the indoor unit and passing through the expansion unit commonly flowing into the compressor.    
     
     
         10 . The cooling apparatus according to  claim 9 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units arranged in a parallel arrangement or a series arrangement.  
     
     
         11 . The cooling apparatus according to  claim 9 , wherein said sub-expansion unit comprises two or more sub-expansion units arranged in a parallel arrangement or a series arrangement.  
     
     
         12 . The cooling apparatus according to  claim 9 , wherein said compressor comprises a two-stage compressor.  
     
     
         13 . A cooling apparatus, comprising an expansion unit used for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor used for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulating the refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using a phase change of the refrigerant, wherein 
 the refrigerant from said outdoor unit passes through a heat exchanging and evaporating unit prior to flowing into said expansion unit, with the refrigerant from said heat exchanging and evaporating unit partially flowing into a sub-expansion unit to become low temperature, low pressure bypassed refrigerant, and both the bypassed refrigerant flowing from the sub-expansion unit and the refrigerant flowing from the indoor unit and passing through the expansion unit commonly passing through the heat exchanging and evaporating unit prior to flowing into the compressor.    
     
     
         14 . The cooling apparatus according to  claim 13 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units arranged in a parallel arrangement or a series arrangement.  
     
     
         15 . The cooling apparatus according to  claim 13 , wherein said sub-expansion unit comprises two or more sub-expansion units arranged in a parallel arrangement or a series arrangement.  
     
     
         16 . The cooling apparatus according to  claim 13 , wherein said compressor comprises a two-stage compressor.