Double-acting refrigeration compressor

Abstract

A double-acting refrigerant compressor includes a piston freely guided in a fixed mounted cylinder. The cylinder includes an inlet valve plate having an inlet valve. The piston includes a flow channel extending internally through the piston. The flow channel of the piston includes at least one back-check valve being arranged with a unidirectional flow. The piston includes a second cylinder portion within which is guided over a fixed mounted inverse piston. The inverse piston includes an inverse piston flow channel with an outlet valve in fluid communication with a volume within the second cylinder portion. Alternative embodiments include a piston with interior cylinders where the piston is guided over the two inverse pistons.

What is claimed is: 
     
         1 . A double-acting refrigerant compressor comprises a piston freely guided in a fixed mounted cylinder, said cylinder comprises an inlet valve plate having an inlet valve, said piston comprises a flow channel extending internally through said piston, said flow channel of said piston comprises at least one back-check valve being arranged with a unidirectional flow, said piston comprises a second cylinder portion which is guided over a fixed mounted inverse piston, said inverse piston comprises an inverse piston flow channel with an outlet valve in fluid communication with a volume within said second cylinder portion. 
     
     
         2 . The double-acting refrigerant compressor of  claim 1 , wherein said fixed mounted cylinder and said fixed mounted inverse piston are mechanically coupled to a common support rack. 
     
     
         3 . A double-acting refrigerant compressor comprises a piston comprising a first interior cylinder portion and a second interior cylinder portion arranged opposite to each other, said first interior cylinder portion is guided over a first inverse piston, and said second interior cylinder portion is guided over a second inverse piston, said piston driven without a connection to a piston rod, said first inverse piston comprising a first inverse piston flow channel extending internally through said first inverse piston and a first inverse piston back-check valve, and said second inverse piston comprising a second inverse piston flow channel extending internally through said second inverse piston and comprising a back-check valve, said first inverse piston flow channel in fluid communication with a low pressure working volume via an inlet valve, and said second inverse piston flow channel in fluid communication with an inverse compression chamber via an outlet valve, said first cylinder portion separated from said second cylinder portion of said cylinder by an intermediate interior wall of said piston which comprises an intermediate valve. 
     
     
         4 . A double-acting refrigerant compressor comprising a piston freely guided on two cylinder portions arranged opposite to each other, said piston comprising a flow channel extending internally through the piston, each cylinder portion and the piston comprising, along the flow channel, respectively at least one back-check valve, the back-check valves being arranged such that their flow directions are unidirectional, and wherein at least one cylinder portion is guided as an inverse piston. 
     
     
         5 . The double-acting refrigerant compressor of  claim 4 , wherein said two cylinder portions are immobile relative to each other.