Compressor unit, heat source unit, and air conditioner

Abstract

A compressor unit for an air conditioner includes a compressor disposed in a first casing, and first and second heat source heat exchanger unit ports configured to connect the compressor unit to a heat source heat exchanger of a heat source heat exchanger unit of the air conditioner, the heat source heat exchanger being disposed in a second casing separate from the first casing and being configured to exchange heat with a heat source, first and second indoor unit ports configured to connect the compressor unit to an indoor heat exchanger of at least one indoor unit of the air conditioner, a first refrigerant piping fluidly connecting the first heat source heat exchanger unit port and the first indoor unit port, and a sub-cooling heat exchanger disposed inside the first casing and fluidly connected to the first refrigerant piping for heat transfer with the refrigerant to be flown through the first refrigerant piping.

1 . A compressor unit for an air conditioner comprising:
 a compressor disposed in a first casing; and   first and second heat source heat exchanger unit ports configured to connect the compressor unit to a heat source heat exchanger of at least one heat source heat exchanger unit of the air conditioner, the heat source heat exchanger being disposed in a second casing separate from the first casing and being configured to exchange heat with a heat source;   first and second indoor unit ports configured to connect the compressor unit to an indoor heat exchanger of at least one indoor unit of the air conditioner;   a first refrigerant piping fluidly connecting the first heat source heat exchanger unit port and the first indoor unit port; and   a sub-cooling heat exchanger disposed inside the first casing and fluidly connected to the first refrigerant piping for heat transfer with the refrigerant to be flown through the first refrigerant piping.   
     
     
         2 . The compressor unit according to  claim 1 , further comprising:
 a second refrigerant piping fluidly connecting the second heat source heat exchanger unit port and the second indoor unit port, the compressor and a 4-way valve being interposed between the second heat source heat exchanger unit port and the second indoor unit port in the second refrigerant piping; and   a bypass passage connected to the second refrigerant piping at a suction side of the compressor between the compressor and the 4-way valve, the sub-cooling heat exchanger being fluidly connected to the bypass passage for heat transfer between refrigerant flowing in the bypass passage and refrigerant flowing in the first refrigerant piping.   
     
     
         3 . The compressor unit according to  claim 1 , wherein the compressor unit does not comprise a main expansion valve of the air conditioner. 
     
     
         4 . The compressor unit according to  claim 1 , further comprising an oil separator located at a discharge side of the compressor between the compressor and a 4-way valve. 
     
     
         5 . A heat source unit for an air conditioner, comprising:
 a compressor unit according to  claim 1 ; and   a heat source heat exchanger unit having a heat source heat exchanger, the heat source heat exchanger being disposed in a second casing separate from the first casing and being configured to exchange heat with a heat source, wherein the heat source heat exchanger unit is fluidly connected to the compressor unit via the first and second heat source heat exchanger unit ports.   
     
     
         6 . The heat source unit according to  claim 5 , wherein a main expansion valve of the air conditioner is disposed in the second casing. 
     
     
         7 . An air conditioner having a heat source unit according to  claim 5 , wherein at least one indoor unit is fluidly connected to the compressor unit via the first and second indoor unit ports. 
     
     
         8 . The compressor unit according to  claim 2 , wherein the compressor unit does not comprise a main expansion valve of the air conditioner. 
     
     
         9 . The compressor unit according to  claim 2 , further comprising an oil separator located at a discharge side of the compressor between the compressor and a 4-way valve. 
     
     
         10 . The compressor unit according to  claim 3 , further comprising an oil separator located at a discharge side of the compressor between the compressor and a 4-way valve. 
     
     
         11 . A heat source unit for an air conditioner, comprising:
 a compressor unit according to  claim 2 ; and   a heat source heat exchanger unit having a heat source heat exchanger, the heat source heat exchanger being disposed in a second casing separate from the first casing and being configured to exchange heat with a heat source, wherein the heat source heat exchanger unit is fluidly connected to the compressor unit via the first and second heat source heat exchanger unit ports.   
     
     
         12 . A heat source unit for an air conditioner, comprising:
 a compressor unit according to  claim 3 ; and   a heat source heat exchanger unit having a heat source heat exchanger, the heat source heat exchanger being disposed in a second casing separate from the first casing and being configured to exchange heat with a heat source, wherein the heat source heat exchanger unit is fluidly connected to the compressor unit via the first and second heat source heat exchanger unit ports.   
     
     
         13 . A heat source unit for an air conditioner, comprising:
 a compressor unit according to  claim 4 ; and   a heat source heat exchanger unit having a heat source heat exchanger, the heat source heat exchanger being disposed in a second casing separate from the first casing and being configured to exchange heat with a heat source, wherein the heat source heat exchanger unit is fluidly connected to the compressor unit via the first and second heat source heat exchanger unit ports.   
     
     
         14 . The heat source unit according to  claim 11 , wherein a main expansion valve of the air conditioner is disposed in the second casing. 
     
     
         15 . The heat source unit according to  claim 12 , wherein a main expansion valve of the air conditioner is disposed in the second casing. 
     
     
         16 . The heat source unit according to  claim 13 , wherein a main expansion valve of the air conditioner is disposed in the second casing. 
     
     
         17 . An air conditioner having a heat source unit according to  claim 11 , wherein at least one indoor unit is fluidly connected to the compressor unit via the first and second indoor unit ports. 
     
     
         18 . An air conditioner having a heat source unit according to  claim 12 , wherein at least one indoor unit is fluidly connected to the compressor unit via the first and second indoor unit ports. 
     
     
         19 . An air conditioner having a heat source unit according to  claim 13 , wherein at least one indoor unit is fluidly connected to the compressor unit via the first and second indoor unit ports. 
     
     
         20 . An air conditioner having a heat source unit according to  claim 6 , wherein at least one indoor unit is fluidly connected to the compressor unit via the first and second indoor unit ports.