Heating apparatus with low compression load

Abstract

The object of this invention is to provide a heating apparatus with low compression load. This heating 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, indoor unit, expansion unit, and outdoor unit to heat a target area using the phase change of the refrigerant. In an embodiment, the apparatus ( 100 ) is designed such that the refrigerant from the indoor unit ( 140 ) 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 heating 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, indoor unit, expansion unit, and outdoor unit to heat a target area using a phase change of the refrigerant, wherein 
 the refrigerant from the indoor 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 heating apparatus according to  claim 1 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units.  
     
     
         3 . The heating apparatus according to  claim 1 , wherein said expansion unit comprises two or more expansion units.  
     
     
         4 . The heating apparatus according to  claim 1 , wherein said compressor comprises a two-stage compressor.  
     
     
         5 . A heating 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, indoor unit, expansion unit, and outdoor unit to heat a target area using a phase change of the refrigerant, wherein 
 the refrigerant from said indoor 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 outdoor unit passing through the heat exchanging and evaporating unit prior to flowing into said compressor.    
     
     
         6 . The heating apparatus according to  claim 5 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units.  
     
     
         7 . The heating apparatus according to  claim 5 , wherein said expansion unit comprises two or more expansion units.  
     
     
         8 . The heating apparatus according to  claim 5 , wherein said compressor comprises a two-stage compressor.  
     
     
         9 . A heating 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, indoor unit, expansion unit, and outdoor unit to heat a target area using a phase change of the refrigerant, wherein 
 the refrigerant from said indoor 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 outdoor unit and passing through the expansion unit commonly flowing into the compressor.    
     
     
         10 . The heating apparatus according to  claim 9 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units.  
     
     
         11 . The heating apparatus according to  claim 9 , wherein said expansion unit comprises two or more expansion units.  
     
     
         12 . The heating apparatus according to  claim 9 , wherein said compressor comprises a two-stage compressor.  
     
     
         13 . A heating 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, indoor unit, expansion unit, and outdoor unit to heat a target area using a phase change of the refrigerant, wherein 
 the refrigerant from said indoor 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 outdoor unit and passing through the expansion unit commonly passing through the heat exchanging and evaporating unit prior to flowing into the compressor.    
     
     
         14 . The heating apparatus according to  claim 13 , wherein said heat exchanging and evaporating unit comprises two or more heat exchanging and evaporating units.  
     
     
         15 . The heating apparatus according to  claim 13 , wherein said expansion unit comprises two or more expansion units.  
     
     
         16 . The heating apparatus according to  claim 13 , wherein said compressor comprises a two-stage compressor.