Bidirectional pump

Abstract

Provided is a bidirectional pump, including a housing comprising a fluid inlet, and first and second fluid outlets that communicate with the fluid inlet and face each other; an impeller disposed in the housing, and rotating in a forward direction or in a reverse direction; a motor configured to impart a rotating force to the impeller; and a diaphragm disposed between the first and second fluid outlets in the housing, and deformed according to pressure exerted by rotation of the impeller, wherein the diaphragm closes either of the first and second fluid outlets according to a rotating direction of the impeller.

What is claimed is: 
     
         1 . A bidirectional pump, comprising:
 a housing comprising a fluid inlet, and first and second fluid outlets that communicate with the fluid inlet and face each other;   an impeller disposed in the housing, and rotating in a forward direction or in a reverse direction;   a motor configured to impart a rotating force to the impeller; and   a diaphragm disposed between the first and second fluid outlets in the housing, and deformed according to pressure exerted by rotation of the impeller,   wherein the diaphragm closes either of the first and second fluid outlets according to a rotating direction of the impeller.   
     
     
         2 . The bidirectional pump of  claim 1 , wherein the diaphragm comprises:
 a fixing part fixed to the housing;   an insert part configured such that a portion thereof is insertable into either of the first and second fluid outlets; and   a deforming part connecting the fixing part and the insert part to each other, and deformable towards either of the first and second fluid outlets.   
     
     
         3 . The bidirectional pump of  claim 2 , wherein the deforming part is an elastic body, is wrinkled before the deformation, and is unwrinkled after the deformation. 
     
     
         4 . The bidirectional pump of  claim 3 , wherein the insert part is formed in a spherical shape, and has a diameter smaller than a diameter of each of the first and second fluid outlets. 
     
     
         5 . The bidirectional pump of  claim 4 , wherein, when the impeller rotates in the forward direction, the deforming part is deformed towards the first fluid outlet so that a portion of the insert part is inserted into the first fluid outlet, and
 when the impeller rotates in the reverse direction, the deforming part is deformed towards the second fluid outlet so that a portion of the insert part is inserted into the second fluid outlet.   
     
     
         6 . The bidirectional pump of  claim 2 , wherein the housing comprises a groove part into which the fixing part is inserted, and
 the fixing part is detachably fixed to the groove part.   
     
     
         7 . The bidirectional pump of  claim 2 , further comprising:
 a partition wall disposed in the housing, and guiding flow of fluid from the fluid inlet to either of the first and second fluid outlets.   
     
     
         8 . The bidirectional pump of  claim 7 , wherein a width of the partition wall is reduced downstream of the fluid flow from the fluid inlet to either of the first and second fluid outlets. 
     
     
         9 . The bidirectional pump of  claim 1 , wherein the housing is integrally formed to prevent the fluid from flowing in and out at positions other than the fluid inlet and the first and second fluid outlets. 
     
     
         10 . The bidirectional pump of  claim 1 , comprising a controller configured to control rotation and a rotating direction of the impeller.