Compact semi-hermetic compressor for refrigeration circuits

Abstract

A compact reciprocating compressor, specially suitable for refrigeration circuits, wherein the low-pressure cock, the high-pressure cock, and at least one porthole for oil level monitoring purposes are placed on one and the same side.

1 . A reciprocating compressor, comprising a casing, which develops along a horizontal longitudinal axis (X) and is made accessible via at least one cover, internally to which there is coaxially accommodated an electric motor which drives into rotation a crankshaft which drives one or several pistons slidingly coupled with inside respective cylinders, via their respective connecting rods, said cylinders being defined in said casing and being closed above by a hollow head which hermetically faces onto a corresponding opening defined above on the body of said casing; a suction chamber and a delivery chamber being defined inside said head, the outer longitudinal side of the delivery chamber being put in communication with the external world via a high-pressure cock; the following elements being defined inside said casing:
 a low-pressure fluid suction duct, which connects said suction chamber with the external world via a low-pressure cock placed on the outer lateral surface of said casing;   a lubricating oil collection area, in correspondence with which, and specifically on the outer lateral surface of said casing, at least one transparent porthole is present to monitor the oil level,   
       wherein said low-pressure cock, said high-pressure cock, and said at least one transparent porthole are all placed on the same side of said compressor, namely on the same portion of the lateral surface of the latter, identified by a vertical longitudinal median plane going through said horizontal longitudinal axis (X), so that said compressor can be installed, the other side being adjacent to a wall. 
     
     
         2 . The compressor according to  claim 1  wherein said high-pressure cock is directly connected to a lateral wall of said head. 
     
     
         3 . The compressor according to  claim 1  wherein a delivery duct is defined inside said casing and connects said delivery chamber of said head to said high-pressure cock. 
     
     
         4 . The compressor according to  claim 3  wherein said high-pressure cock is directly connected to a lateral wall of said casing via a vertical sealing face. 
     
     
         5 . The compressor according to  claim 3  wherein an end portion of said delivery duct defines a small chamber which presents a horizontal upper interfacing face, which the sealing face of said high-pressure cock is associated with. 
     
     
         6 . The compressor according to  claim 1  wherein said low-pressure cock and said high-pressure cock are placed above a horizontal longitudinal plane going through said horizontal longitudinal axis (X), whereas said at least one transparent porthole is placed below said horizontal longitudinal plane. 
     
     
         7 . The compressor according to  claim 1  wherein it comprises a transparent porthole on each side. 
     
     
         8 . The compressor according to  claim 1  wherein it is a semi-hermetic compressor. 
     
     
         9 . The compressor according to  claim 8  wherein said casing is hermetically closed by two end covers. 
     
     
         10 . The compressor according to  claim 2  wherein it is a semi-hermetic compressor. 
     
     
         11 . The compressor according to  claim 3  wherein it is a semi-hermetic compressor. 
     
     
         12 . The compressor according to  claim 4  wherein it is a semi-hermetic compressor. 
     
     
         13 . The compressor according to  claim 5  wherein it is a semi-hermetic compressor. 
     
     
         14 . The compressor according to  claim 6  wherein it is a semi-hermetic compressor.