Water pump assembly

Abstract

A water pump assembly includes a pump provided with a first inlet and a first outlet and a damper mounted on top of the pump and having a second inlet in communication with the first inlet for communication with a water inflow, a second outlet in communication with the first outlet and a cavity communicating with the second outlet for communication with a water outflow. The cavity is filled with a sound-absorbing cotton.

What is claimed is: 
     
         1 . In a water pump assembly having pump provided with a first inlet and a first outlet, wherein the improvements comprise: a damper mounted on top of the pump and having a second inlet in communication with the first inlet for communication with a water inflow, a second outlet in communication with the first outlet and a cavity communicating with the second outlet for communication with a water outflow. 
     
     
         2 . The water pump assembly as claimed in  claim 1 , wherein a ratio between a cross section of the cavity and a cross section of the first outlet is 3:1˜28:1. 
     
     
         3 . The water pump assembly as claimed in  claim 1 , wherein a first circumferential flange is adapted to be formed on an outer periphery of the pump and the damper has a second circumferential flange formed on an outer periphery thereof to correspond to and mate with the first circumferential flange so as to allow a positioning element to extend through the mated first circumferential flange and the second circumferential flange to complete assembly between the pump and the damper. 
     
     
         4 . The water pump assembly as claimed in  claim 2 , wherein the cavity is filled with a sound-absorbing cotton. 
     
     
         5 . The water pump assembly as claimed in  claim 3 , wherein the cavity is filled with a sound-absorbing cotton. 
     
     
         6 . The water pump assembly as claimed in  claim 2 , wherein a cross section ratio between the cavity and the first outlet is 20:1. 
     
     
         7 . The water pump assembly as claimed in  claim 3 , wherein a cross section ratio between the cavity and the first outlet is 20:1. 
     
     
         8 . The water pump assembly as claimed in  claim 4 , wherein a cross section ratio between the cavity and the first outlet is 20:1. 
     
     
         9 . The water pump assembly as claimed in  claim 5 , wherein a cross section ratio between the cavity and the first outlet is 20:1.