Air ducting shroud for cooling an air compressor pump and motor

Abstract

A compressor assembly having a sound reduction shroud and a sound level of 75 dBA or less when in a compressing state. The sound reduction shroud can be a cylinder head shroud, a pump cylinder shroud, or a pump assembly shroud. The sound reduction shroud can optionally cover one or more of a compressor pump assembly, a cylinder head and a compressed gas outlet line. A compressor assembly having a sound reduction conduit and a sound level of 75 dBA or less when in a compressing state. The sound reduction conduit provides a cooling air channel directing cooling air to cool one or more portions of the compressor assembly and can direct exhaust cooling air to an exhaust port. A method for compressing a gas at a sound level of 75 dBA or less when the compressor is in a compressing state using a sound reduction shroud or a sound reduction conduit.

We claim: 
     
         1 . A compressor assembly, comprising:
 a fan;   a pump assembly;   a motor;   a sound reduction shroud; and   a sound level having a value of 75 dBA or less when the compressor is in a compressing state.   
     
     
         2 . The compressor assembly according to  claim 1 , wherein the sound reduction shroud is a cylinder head shroud. 
     
     
         3 . The compressor assembly according to  claim 2 , wherein the cylinder head shroud covers at least a portion of a cylinder head. 
     
     
         4 . The compressor assembly according to  claim 2 , wherein the cylinder head shroud covers at least a portion of a cylinder head and at least a portion of a compressed gas outlet line. 
     
     
         5 . The compressor assembly according to  claim 4 , wherein the cylinder head shroud can have a shroud coverage angle which is equal to or less than 45°. 
     
     
         6 . The compressor assembly according to  claim 1 , wherein the sound reduction shroud is a pump cylinder shroud. 
     
     
         7 . The compressor assembly according to  claim 6 , wherein the pump cylinder shroud covers at least a portion of a cylinder head and at least a portion of a pump cylinder. 
     
     
         8 . The compressor assembly according to  claim 6 , wherein the pump cylinder shroud covers at least a portion of a cylinder head, at least a portion of a pump cylinder and at least a portion of a compressed gas outlet line. 
     
     
         9 . The compressor assembly according to  claim 8 , wherein the pump cylinder shroud can have a shroud coverage angle which is in a range of 33° to 75°. 
     
     
         10 . The compressor assembly according to  claim 1 , wherein the sound reduction shroud is a pump assembly shroud. 
     
     
         11 . The compressor assembly according to  claim 10 , wherein the pump assembly shroud covers at least a portion of a cylinder head, at least a portion of a pump cylinder, and at least a portion of the eccentric drive. 
     
     
         12 . The compressor assembly according to  claim 10 , wherein the pump assembly shroud covers at least a portion of a cylinder head, at least a portion of a pump cylinder, at least a portion of the eccentric drive and at least a portion of a compressed gas outlet line. 
     
     
         13 . The compressor assembly according to  claim 12 , wherein the pump assembly shroud can have a shroud coverage angle which is in a range of 45° to 90°. 
     
     
         14 . The compressor assembly according to  claim 10 , wherein the pump assembly shroud, at least in part, provides a fillable space between the pump assembly shroud and a compressor housing into which a sound absorbing material can be placed, said fillable space filled at least in part with the sound absorbing material. 
     
     
         15 . A compressor assembly, comprising:
 a fan;   a pump assembly;   a motor;   a sound reduction conduit; and   a sound level having a value of 75 dBA or less when the compressor is in a compressing state.   
     
     
         16 . The sound reduction conduit according to  claim 15 , which covers at least in part each of the eccentric drive, the pump assembly and the compressed gas outlet line. 
     
     
         17 . The sound reduction conduit according to  claim 15 , wherein the sound reduction conduit provides a cooling air flow path which receives cooling air from the fan and which exhausts cooling air effluent in the direction of an exit port. 
     
     
         18 . The sound reduction conduit according to  claim 15 , wherein the sound reduction conduit provides a cooling air channel which receives a cooling air from the fan and directs the cooling air to the motor, a cylinder head and a compressed gas outlet line. 
     
     
         19 . A method for compressing a gas, comprising the steps of:
 providing a compressor assembly having a motor, a pump assembly, a cylinder head and a compressed gas outlet line;   providing a sound reduction shroud which covers at least a portion of the cylinder head;   using the sound reduction shroud to direct, toward an exhaust port, at least a portion of a cooling air flow across the cylinder head.   
     
     
         20 . A method for compressing a gas according to  claim 19 , further comprising the step of using the sound reduction shroud to direct at least a portion of a cooling air which flows across the motor in a direction toward an exhaust port.