Compressor and vacuum machine

Abstract

A compressor includes: a cylinder; a piston arranged within in the cylinder; an outer rotor type motor causing the piston to reciprocate within the cylinder; an air pipe communicated with the cylinder such that air flows into the air pipe in response to reciprocation of the piston; and a fan secured to a rotor of the outer rotor type motor and facing at least a part of the air pipe.

What is claimed is: 
     
         1 . A compressor comprising:
 a cylinder;   a piston arranged within in the cylinder;   an outer rotor type motor causing the piston to reciprocate within the cylinder;   an air pipe communicated with the cylinder such that air flows into the air pipe in response to reciprocation of the piston; and   a fan secured to a rotor of the outer rotor type motor and facing at least a part of the air pipe.   
     
     
         2 . The compressor of  claim 1 , wherein
 the cylinder includes adjacent first and second cylinders, and   the air pipe includes:
 a first air portion communicated within the first cylinder sandwiched between the first air portion and the fan; 
 a second air portion communicated within the second cylinder and sandwiched between the fan and the second cylinder; and 
 a communication portion extending between the first and second cylinders and communicating the first and second cylinders with each other. 
   
     
     
         3 . The compressor of  claim 2 , wherein
 the first cylinder is close to the fan, and   the second cylinder is distant from the fan.   
     
     
         4 . The compressor of  claim 1 , wherein the air pipe is provided between the cylinder and the fan, and has a substantially ring shape along an outer circumference of the fan when viewed in an axial direction of rotation of the fan. 
     
     
         5 . The compressor of  claim 1 , wherein
 the cylinder includes adjacent first and second cylinders, and   the air pipe communicates the first and second cylinders within each other.   
     
     
         6 . The compressor of  claim 1 , wherein the fan is arranged in a radial direction of the rotor. 
     
     
         7 . A vacuum machine comprising:
 a cylinder;   a piston arranged within in the cylinder;   an outer rotor type motor causing the piston to reciprocate within the cylinder;   an air pipe communicated with the cylinder such that air flows into the air pipe in response to reciprocation of the piston; and   a fan secured to a rotor of the outer rotor type motor and facing at least a part of the air pipe.   
     
     
         8 . The vacuum machine of  claim 7 , wherein
 the cylinder includes adjacent first and second cylinders, and   the air pipe includes:
 a first air portion communicated within the first cylinder sandwiched between the first air portion and the fan; 
 a second air portion communicated within the second cylinder and sandwiched between the fan and the second cylinder; and 
 a communication portion extending between the first and second cylinders and communicating the first and second cylinders with each other. 
   
     
     
         9 . The vacuum machine of  claim 8 , wherein
 the first cylinder is close to the fan, and   the second cylinder is distant from the fan.   
     
     
         10 . The vacuum machine of  claim 7 , wherein the air pipe is provided between the cylinder and the fan, and has a substantially ring shape along an outer circumference of the fan when viewed in an axial direction of rotation of the fan. 
     
     
         11 . The vacuum machine of  claim 7 , wherein
 the cylinder includes adjacent first and second cylinders, and   the air pipe communicates the first and second cylinders within each other.   
     
     
         12 . The vacuum machine of  claim 7 , wherein the fan is arranged in a radial direction of the rotor.