Fluid compressor

Abstract

A fluid compressor that ensures the discharge of water from a discharge port when water is drawn into or condensed in a pump chamber. The compressor includes a pump chamber for drawing in fluid. The pump chamber includes a bottom part located in a lower portion of the pump chamber. Two rotors arranged in the pump chamber are rotated to compress the fluid in the pump chamber. A discharge port located in the bottom part discharges the compressed fluid out of the pump chamber. The bottom part defines a guide surface formed continuously from the discharge port. The guide surface is sloped downward so that water on the guide surface moves downward to the discharge port due to gravitational force.

1 . A compressor for compressing a fluid, the compressor comprising: 
 a pump chamber for drawing in fluid, the pump chamber including a bottom part located in a lower portion of the pump chamber with respect to the gravitational direction in a normal installation state of the compressor;    two parallel rotation shafts arranged in the pump chamber;    two rotors respectively fixed to the two rotary shafts, the rotors being rotated to compress the fluid in the pump chamber; and    a discharge port for discharging the compressed fluid out of the pump chamber, the discharge port located at a lowermost position in the pump chamber when a plane including the axes of the two rotary shafts is substantially lies along a horizontal plane or is inclined by a predetermined angle relative to the horizontal plane;    wherein the bottom part partially or entirely defines a guide surface formed continuously from the discharge port, the guide surface being sloped downward so that water on the guide surface moves downward to the discharge port due to gravitational force when the discharge port is located at the lowermost portion in the bottom part of the pump chamber.    
   
   
       2 . The compressor according to  claim 1 , wherein the guide surface is generally funnel-shaped so that the discharge port is located at the bottom of the guide surface.  
   
   
       3 . The compressor according to  claim 1 , wherein the rotors rotate along a rotation path, and the guide surface is shaped differently from the rotation path.  
   
   
       4 . The compressor according to  claim 1 , wherein the guide surface has a cross-section generally shaped in correspondence with part of an ellipse, and the discharge port is located at a position where the minor axis and circumference of the ellipse intersect or in the vicinity of the position where the minor axis and circumference of the ellipse intersect.  
   
   
       5 . The compressor according to  claim 1 , wherein the guide surface has a cross-section generally shaped in correspondence with part of an ellipsoid, and the discharge port is located at a position along the direction of the minor axis that extends from the center of the ellipsoid or in the vicinity of the position along the direction of the minor axis that extends from the center of the ellipsoid.  
   
   
       6 . A compressor for compressing a fluid, the compressor comprising: 
 a pump chamber for drawing in fluid, the pump chamber including a bottom part located in a lower portion of the pump chamber;    a rotor arranged in the pump chamber, the rotor being rotated to compress the fluid in the pump chamber; and    a discharge port, located in the bottom part, for discharging the compressed fluid out of the pump chamber;    wherein the bottom part partially or entirely defines a guide surface formed continuously from the discharge port, the guide surface being sloped downward so that water on the guide surface moves downward to the discharge port due to gravitational force.    
   
   
       7 . The compressor according to  claim 6 , wherein the guide surface is generally funnel-shaped so that the discharge port is located at the bottom of the guide surface.  
   
   
       8 . The compressor according to  claim 6 , wherein the rotors rotate along a rotation path, and the guide surface is shaped differently from the rotation path.  
   
   
       9 . The compressor according to  claim 6 , wherein the guide surface has a cross-section generally shaped in correspondence with part of an ellipse, and the discharge port is located at a position where the minor axis and circumference of the ellipse intersect or in the vicinity of the position where the minor axis and circumference of the ellipse intersect.  
   
   
       10 . The compressor according to  claim 6 , wherein the guide surface has a cross-section generally shaped in correspondence with part of an ellipsoid, and the discharge port is located at a position along the direction of the minor axis that extends from the center of the ellipsoid or in the vicinity of the position along the direction of the minor axis that extends from the center of the ellipsoid.