Compressor

Abstract

In the case of a compressed air compressor, intake openings located in the cylinder covers are connected to intake pipes made from elastomeric material, the length of which pipes amounts to a multiple of the clear cross-section. The intake pipes have a semicircular pipe portion at the cylinder end and a straight free pipe portion, which extends over the outer surface of the associated cylinder at a slight distance therefrom.

1 . A compressor having at least one compression unit, which comprises a cylinder and a piston extending therein, and having a drive motor acting on the compression units, the cylinder in each case comprising an intake opening for decompressed gas and an intake opening for compressed gas, wherein at least one of the intake openings is connected to a bent intake pipe, the length of which amounts to a multiple of the clear diameter of the intake pipe.  
   
   
       2 . The compressor of  claim 1 , wherein the length of the intake pipe amounts to 10 to 30 times the clear diameter.  
   
   
       3 . The compressor of  claim 1 , wherein a cylinder-side end of the intake pipe is provided with coupling means, which cooperate with mating coupling means of the cylinder.  
   
   
       4 . The compressor of  claim 3 , wherein the coupling means is latching means which cooperate with the mating latching means of the cylinder.  
   
   
       5 . The compressor of  claim 3 , wherein the mating coupling means are located at the inlet of a filter chamber, in which an air filter is accommodated.  
   
   
       6 . The compressor of  claim 1 , wherein the free end of the intake pipe remote from the cylinder comprises a rounded portion, via which the end face of the intake pipe is connected smoothly with the intake channel extending in the intake pipe.  
   
   
       7 . The compressor of  claim 6 , wherein a radius of the rounded portion amounts to approximately 0.2 to 0.7 times the radius of the intake channel.  
   
   
       8 . The compressor of  claim 7 , wherein the free end of the intake pipe remote from the cylinder takes the form of a toroidal bead extending over an angle of approximately 270°.  
   
   
       9 . The compressor of  claim 7 , wherein the radius of the intake channel ranges from approximately 3 to approximately 8 mm.  
   
   
       10 . The compressor of  claim 1 , wherein the intake pipe comprises a bent pipe portion on the cylinder side and a substantially straight pipe portion borne thereby.  
   
   
       11 . The compressor of  claim 10 , wherein the bent pipe portion extends over an angle of approximately 180°.  
   
   
       12 . The compressor of  claim 11 , wherein the straight pipe portion extends over approx. 80 to 95% of the height of the cylinder.  
   
   
       13 . The compressor of  claim 12 , wherein the free end of the intake pipes ends at a distance above the outer surface of a crankcase, in which crank drives acting on the piston are accommodated, which are moved by the drive motor.  
   
   
       14 . The compressor of  claim 13 , wherein the outer surface of the crankcase is sound-absorbent at least in areas adjacent the ends of the intake pipes.  
   
   
       15 . The compressor of  claim 1 , wherein the inner surface of the intake pipes is at least partially sound-absorbent.  
   
   
       16 . The compressor of  claim 1 , wherein the intake pipes are made from an elastomeric material, which exhibits a Shore A hardness of from 50 to 70.  
   
   
       17 . The compressor of  claim 1 , including two compression units driven by a common drive motor, wherein the intake openings of the two cylinders are staggered relative to one another in the axial direction of the shaft of the drive motor, preferably being located at corners of the cylinders having square edge contours.  
   
   
       18 . The compressor of  claim 1 , wherein the ends of the intake pipes end at points where cool air is present.  
   
   
       19 . The compressor of  claim 18 , wherein the ends of the intake pipes end at a casing portion that is cooled by cooling air.