Air pump having an impeller with double-sided blades

Abstract

An air pump having an impeller with double-sided blades is mounted outside an inflatable product, and has a body and a blower. The body has a first air chamber and a second air chamber communicating with each other, a first air inlet and a second air inlet formed at two ends of the first air chamber, and multiple first supplement air inlets formed through the body to communicate with the second air chamber. The blower has a motor and an impeller. The impeller driven by the motor has multiple double-sided blades capable of efficiently inflating air from the multiple first supplement air inlets or deflating air from the first air inlet. The air pump achieves to be more efficient in inflating and deflating the inflatable product, and structurally simplified to facilitate production and assembly of the air pump and cost reduction in production and assembly.

1 . An air pump comprising:
 a body having:
 a wall; 
 a first air chamber formed inside the body; 
 a second air chamber formed inside the body and defined by the wall; 
 a first air inlet formed at one end of the first air chamber; 
 a second air inlet formed at another end of the first air chamber; 
 multiple first supplement air inlets formed through the wall of the body and adapted to communicate with a surrounding environment; and 
 a second supplement air inlet formed between and communicating with the first air chamber and the second air chamber; 
   a blower mounted inside the body and having:
 a motor mounted in the second air chamber; and 
 an impeller mounted in the first air chamber, connected with and driven by the motor to generate air flow, and having:
 multiple blades formed on and protruding from two opposite sides of the impeller; 
 multiple air guide channels respectively communicating with the first air inlet and the second supplement air inlet, each of the air guide channels formed between two corresponding adjacent blades; 
 
   two air valves mounted through the body, and activated and deactivated to respectively close and open the first supplement air inlets; and   a power switch mounted on the body, and electrically connected with the motor.   
     
     
         2 . The air pump as claimed in  claim 1 , wherein
 the impeller further has:
 a disk having two opposite sides; and 
 a rotation shaft centrally and perpendicularly formed through the disk; 
   each of the blades is formed on the rotation shaft and one of the two opposite sides of the disk, and radially extends from the rotation shaft and axially protrudes from the disk; and   each of the air guide channels is radially and outwardly widened from the rotation shaft, and has:
 a radial open side defined between the two blades, and positioned away from the rotation shaft, wherein the radial open side facing the second air inlet communicates with the second air inlet; and 
 an axial open side defined between the two blades, and positioned adjacent to the rotation shaft, wherein the axial open side facing the first air inlet communicates with the first air inlet, and the axial open side facing the second supplement air inlet communicates with the second supplement air inlet. 
   
     
     
         3 . The air pump as claimed in  claim 1 , wherein the body further has a deflation passage formed inside the body and communicating with the first air inlet and the second supplement air inlet. 
     
     
         4 . The air pump as claimed in  claim 2 , wherein the body further has a deflation passage formed inside the body and communicating with the first air inlet and the second supplement air inlet. 
     
     
         5 . The air pump as claimed in  claim 1 , wherein each of the air valves has:
 a sliding board having multiple air vents mounted through the sliding board, corresponding to the first supplement air inlets, being movable to align and misalign the air vents with the first supplement air inlets, and having a top;   a pressing member mounted on the top of the sliding board, and having a top end protruding beyond the body and located beside the first air inlet; and   a spring mounted underneath the top end of the pressing member to keep the top end of the pressing member protruding beyond the body when the pressing member is not pressed.   
     
     
         6 . The air pump as claimed in  claim 2 , wherein each of the air valves has:
 a sliding board having multiple air vents mounted through the sliding board, corresponding to the first supplement air inlets, being movable to align and misalign the air vents with the first supplement air inlets, and having a top;   a pressing member mounted on the top of the sliding board, and having a top end protruding beyond the body and located beside the first air inlet; and   a spring mounted underneath the top end of the pressing member to keep the top end of the pressing member protruding beyond the body when the pressing member is not pressed.   
     
     
         7 . The air pump as claimed in  claim 3 , wherein each of the air valves has:
 a sliding board having multiple air vents mounted through the sliding board, corresponding to the first supplement air inlets, being movable to align and misalign the air vents with the first supplement air inlets, and having a top;   a pressing member mounted on the top of the sliding board, and having a top end protruding beyond the body and located beside the first air inlet; and   a spring mounted underneath the top end of the pressing member to keep the top end of the pressing member protruding beyond the body when the pressing member is not pressed.   
     
     
         8 . The air pump as claimed in  claim 4 , wherein each of the air valves has:
 a sliding board having multiple air vents mounted through the sliding board, corresponding to the first supplement air inlets, being movable to align and misalign the air vents with the first supplement air inlets, and having a top;   a pressing member mounted on the top of the sliding board, and having a top end protruding beyond the body and located beside the first air inlet; and   a spring mounted underneath the top end of the pressing member to keep the top end of the pressing member protruding beyond the body when the pressing member is not pressed.