Central compressor variable refrigerant flow air conditioning sysytem

Abstract

An oil-free central compressor variable refrigerant flow air conditioning system structure and method is set out. The system may be a new installation, or retrofit. Refrigerant piping spans are not limited by considerations of entrained oil flow.

1  . A central compressor station multipoint vapor compression air-conditioning system, comprising:
 a physically centralized compressor station having at least one magnetic levitation bearing type compressor requiring no entrained oil in refrigerant fluid compressed by said compressor, 
 a physically centralized condenser package for removal of heat from said refrigerant fluid, 
 a refrigerant fluid piping system having a refrigerated fluid piping system, 
 At least one space to be conditioned, 
 At least one expansion valve located upstream of said evaporators, at least one said evaporator located over 500 feet from said compressor, 
 Wherein refrigerated fluid is delivered from said centralized condenser to said evaporator. 
 
     
     
         2 . A retrofitted central compressor station multipoint vapor compression air-conditioning system, comprising:
 Hey physically centralized compressor station having at least one magnetic levitation bearing type compressor requiring no Entrained oil in refrigerant fluid compressed by said compressor,   a physically centralized condenser package for removal of heat from said refrigerant fluid,   a refrigerant fluid piping system having a refrigerated fluid piping system,   At least one space to be conditioned, said space being previously serviced by a separate dedicated compressor and dedicated condenser, so I dedicated compressor and condenser and being disconnected from said fluid piping system,   At least one evaporator serving said space,   At least one expansion valve located upstream Of said evaporator,   At least one I′ve said evaporators located at least 500 feet from said compressor,   Wherein the refrigerated fluid is delivered from said centralized condenser to said evaporator.   
     
     
         3 . Hey retrofitted central compressor station multipoint vapor compression air-conditioning system, comprising:
 Hey physically centralized compressor station having at least one magnetic levitation bearing type compressor requiring no Entrained oil in refrigerant fluid compressed by said compressor,   Hey refrigerant fluid piping system Having a refrigerated fluid piping system,   At least one space to be conditioned, subspace being previously served by a separate dedicated compressor and dedicated condenser,   Said dedicated compressor being disconnected from said piping system,   At least one evaporator serving said space, at least one expansion valve located upstream Of said evaporator,   At least one of said evaporators being located at least 500 feet from said compressor,   Wherein refrigerant fluid is delivered from said centralized compressor to said condenser.