Wet and dry pump

Abstract

Disclosed is a wet and dry pump, comprising: a housing having an inlet and an outlet of fluid; an impeller rotatably set in the housing; and a motor including a rotating shaft connected to the impeller, a stator fixed to an inner circumferential surface of the housing and having a damp-proof-processed winding coil therein, and a rotor fixed to an outer circumference of the rotating shaft with maintaining a certain gap with an inner circumference of the stator. Therefore, it can be advantageous to improve characteristics of power consumption and noise by making wet air or liquid pass through a passage between the stator and the rotor.

1 . A wet and dry pump, comprising: 
 a housing having an inlet and an outlet of fluid;    an impeller rotatably set in the housing; and    a motor including a rotating shaft connected to the impeller, a stator fixed to an inner circumferential surface of the housing and having a damp-proof-processed winding coil therein, and a rotor fixed to an outer circumference of the rotating shaft with maintaining a certain gap with an inner circumference of the stator.    
   
   
       2 . The pump of  claim 1 , wherein the stator comprises: 
 a plurality of bobbins arranged as a ring shape and each bobbin having a coil wound therein, wherein an entire outer portion of the each bobbin is molded; and    a plurality of conductors connected to the plurality of bobbins, respectively, and exposed to the outside of the molding portion at a certain interval along an inner circumference of the stator.    
   
   
       3 . The pump of  claim 2 , wherein the housing comprises: 
 a cylindrical impeller cover having the inlet at a central upper portion thereof and in which an impeller is arranged; and    a motor cover to which the impeller cover is coupled, at which a plurality of outlets are formed along an outer circumference thereof, and which the stator is fixed to an inner circumference thereof.    
   
   
       4 . The pump of  claim 3 , wherein a guide member for guiding fluid sucked by the impeller toward the motor cover is installed between the impeller cover and the motor cover.  
   
   
       5 . The pump of  claim 4 , wherein the guide member has a flat-type ring shape forming a curved surface toward the impeller.  
   
   
       6 . The pump of  claim 4 , wherein the plurality of outlets are respectively formed at upper and lower sides of the stator.  
   
   
       7 . The pump of  claim 3 , wherein a cooling passage through which fluid sucked by the impeller passes is formed between an outer circumference of the stator and an inner circumference of the motor cover.  
   
   
       8 . The pump of  claim 4 , wherein the molding portion comprises a protruded portion protruding on an outer circumference of the molding portion to be fixed to an inner circumference of the motor cover, and a recessed portion recessed in the outer circumference of the molding portion to form the cooling passage with the inner circumference of the motor cover.  
   
   
       9 . The pump of  claim 1 , wherein the motor is installed on a passage of the fluid flowed from the inlet to the outlet.