Compressor with suction valves in piston and crankcase

Abstract

One or more techniques and/or systems are disclosed for a compressor assembly that may comprise a crankcase with a suction pipe connected to the crankcase, wherein the crankcase suction pipe is configured to be in fluid communication with the crankcase. A crankcase suction valve may be located between the crankcase suction pipe and the crankcase, wherein the crankcase suction valve is configured to prevent backflow from the crankcase into the suction pipe. A first piston may include a suction valve which allows fluid to flow from the crankcase through the first piston and into a first cylinder. A discharge valve may be connected to a head of the first cylinder, facilitating the expulsion of compressed fluid out of the first cylinder.

What is claimed is: 
     
         1 . A compressor assembly, comprising:
 a crankcase comprising an internal crankcase chamber;   a first suction port fluidly coupling a suction line with the crankcase chamber;   a suction port valve disposed at the suction port between the suction line and the crankcase chamber, wherein the suction port valve merely allows flow from the suction line to the crankcase chamber;   a first piston disposed inside a first cylinder, the first piston comprising a first transfer port fluidly coupling the crankcase chamber with the inside of the first cylinder, the first transfer port comprising a piston valve that merely allows flow from the crankcase chamber to inside of the first cylinder; and   a first discharge port fluidly coupling the inside of the first cylinder with a first cylinder head the first discharge port comprising a discharge valve that merely allows flow from the inside of the first cylinder to the cylinder head.   
     
     
         2 . The compressor assembly of  claim 1 , further comprising a discharge line fluidly coupled with the first cylinder head and operably receiving fluid discharged from the first cylinder head. 
     
     
         3 . The compressor assembly of  claim 1 , further comprising a second cylinder and a second piston disposed inside the second cylinder, the second piston operating in conjunction with the first piston. 
     
     
         4 . The compressor assembly of  claim 3 , the second piston comprising a second transfer port fluidly coupling the crankcase chamber with the inside of the second cylinder, the second transfer port comprising a piston valve that merely allows flow from the crankcase chamber to inside of the second cylinder. 
     
     
         5 . The compressor assembly of  claim 4 , comprising a second discharge port fluidly coupling the inside of the second cylinder with a second cylinder head the second discharge port comprising a discharge valve that merely allows flow from the inside of the second cylinder to the second cylinder head. 
     
     
         6 . The compressor assembly of  claim 3 , comprising a second discharge port fluidly coupling the inside of the second cylinder with a second discharge line. 
     
     
         7 . The compressor assembly of  claim 3 , comprising a first discharge line that is fluidly coupled with the first cylinder head, and a second suction port that fluidly couples the first discharge line with the second cylinder. 
     
     
         8 . The compressor assembly of  claim 7 , the second suction port comprising a discharge valve that merely allows flow from the first discharge line to the second cylinder. 
     
     
         9 . The compressor assembly of  claim 8 , comprising a second discharge port fluidly coupling the inside of the second cylinder with a second discharge line, the second discharge port comprising a discharge valve that merely allows flow from the inside of the second cylinder to the second discharge line. 
     
     
         10 . The compressor assembly of  claim 3 , comprising a second discharge port fluidly coupling the inside of the second cylinder with a second discharge line. 
     
     
         11 . The compressor assembly of  claim 3 , wherein fluid is drawn in through the suction port when the first and second pistons are respectively extended in the first and second cylinders. 
     
     
         12 . The compressor assembly of  claim 3 , wherein fluid is expelled through the first and second piston ports respectively when the first and second pistons are respectively retracted from the first and second cylinders. 
     
     
         13 . A compressor assembly, comprising:
 a crankcase comprising an interior chamber;   an inlet suction line;   an inlet suction port fluidly coupling the inlet suction line with the interior chamber;   an inlet suction valve disposed at the inlet suction port, the inlet suction valve configured to merely allow fluid flow from the inlet suction line to the interior chamber;   a first piston reciprocally mounted inside a first cylinder, wherein the first cylinder is fluidly coupled with the interior chamber through a first piston port disposed in the first piston;   a first piston valve that is configured to merely allow fluid to flow from the crankcase chamber through the first piston into the first cylinder during a suction stroke;   a first cylinder head fluidly coupled with the first cylinder,   a first cylinder port fluidly coupling the first cylinder with the first cylinder head;   a first discharge port in the first cylinder head, fluidly coupling the first cylinder to the first cylinder head; and   a first discharge valve at the first discharge port, and configured to merely allow fluid flow from the first cylinder to the first cylinder head during a discharge stroke; and   a first discharge line fluidly coupled with, and downstream from, the first cylinder head.   
     
     
         14 . The compressor assembly of  claim 13 , comprising a second piston reciprocally mounted inside a second cylinder, wherein the second cylinder is fluidly coupled with the interior chamber through a second piston port disposed in the second piston, and a one-way, second piston valve that is configured to merely allow fluid to flow from the crankcase chamber through the second piston into the second cylinder during a suction stroke. 
     
     
         15 . The compressor assembly of  claim 14 , comprising a second cylinder head fluidly coupled with the second cylinder, and second discharge port in the second cylinder head, the second discharge port fluidly coupling the second cylinder head with the second cylinder, and a second discharge valve at the second discharge port, and configured to merely allow fluid flow from the second cylinder to the second cylinder head during a discharge stroke. 
     
     
         16 . The compressor assembly of  claim 13 , comprising a second piston reciprocally mounted inside a second cylinder, the second cylinder fluidly coupled with a second suction line that is fluidly coupled with the first discharge line, and comprising a second suction port valve that merely allows flow from the second suction line into the second cylinder. 
     
     
         17 . The compressor assembly of  claim 16 , comprising a second discharge line fluidly coupled with the second cylinder head, and comprising a second discharge port valve that merely allows flow from the second cylinder to the second discharge line. 
     
     
         18 . The compressor assembly of  claim 13 , comprising a second piston reciprocally mounted inside a second cylinder, the second cylinder fluidly coupled with a second suction line that is fluidly coupled with the first suction line. 
     
     
         19 . The compressor assembly of  claim 16 , wherein the first piston and first cylinder have a different displacement than the second piston and second cylinder. 
     
     
         20 . A compressor assembly comprising:
 a crankcase comprising an internal crankcase chamber;   a first suction port fluidly coupling a suction line with the crankcase chamber;   a suction port valve disposed at the suction port between the suction line and the crankcase chamber, wherein the suction port valve merely allows flow from the suction line to the crankcase chamber;   a first piston disposed inside a first cylinder, the first piston comprising a first transfer port fluidly coupling the crankcase chamber with the inside of the first cylinder, the first transfer port comprising a piston valve that merely allows flow from the crankcase chamber to inside of the first cylinder;   a first discharge port fluidly coupling the inside of the first cylinder with a first cylinder head the first discharge port comprising a discharge valve that merely allows flow from the inside of the first cylinder to the cylinder head;   a discharge line fluidly coupled with the first cylinder head and operably receiving fluid discharged from the first cylinder head; and   a second cylinder and a second piston disposed inside the second cylinder, the second piston operating in conjunction with the first piston; and   a second discharge line fluidly coupled with the second cylinder.