Negative-pressure oxygen providing device

Abstract

A negative-pressure oxygen providing device includes a base, a power unit, a first negative-pressure device, a second negative-pressure device, and a water suction member. The power unit is fixed on the base and includes a driving member with a driving shaft and a main shaft which communicates with the driving shaft. The driving member drives the driving shaft and the main shaft. The first negative-pressure device is connected to a lower end of the main shaft and includes multiple blades which are merged in the water. The water suction member is connected to the main shaft and includes multiple paths. Each path has a top portion located above the water and a bottom portion of each path is in the water. The second negative-pressure device is located above the water and fixed to the top of the driving shaft so as to suck air into the driving shaft.

1 . A negative-pressure oxygen providing device comprising:
 a base having frames connected thereon;   a power unit fixed to the frames and including a driving member, a driving shaft and a top cap, the driving member driving the driving shaft which is a hollow shaft, the top cap having orifices in the top thereof and mounted on a top of the driving member;   a main shaft being a hollow shaft and connected to a lower end of the driving shaft and communicating with the driving shaft;   at least one negative-pressure device connected to a lower end of the main shaft and including multiple blades located along a periphery thereof, each blade having a thin first end which becomes gradually thicker until a second end of the blade, a lower end of the main shaft and the negative-pressure device being merged into water;   a water suction member having a passage defined centrally therethrough and the main shaft securely extending through the passage, the water suction member located on the at least one negative-pressure device and having multiple paths spirally defined in a periphery thereof, each path having a top portion located above the water and a bottom portion of each path being in the water;   at least one second negative-pressure device located above the water and fixed to a top of the driving shaft so as to suck air into the driving shaft, the at least one second negative-pressure device having a bottom blade unit, a top blade unit, a bottom cap and a collar, the bottom blade unit including a bottom disk and multiple curved top guide plates and curved bottom guide plates extending radially from top and bottom of the bottom disk respectively, a top guide groove defined between two adjacent top guide plates and a bottom guide groove defined between two adjacent bottom guide plates, the top guide grooves communicating with each other at a center of the bottom disk, the bottom guide grooves communicating to each other at the center of the bottom disk, multiple notches defined in a periphery of the bottom disk and communicating with the top and bottom guide grooves corresponding thereto, the top blade unit having a top disk and an inlet defined centrally therethrough, multiple blades extending radially from a top of the top disk, the top blade unit fixed to a top of the bottom blade unit, the top disk sealing top portions of the top guide grooves, inlet communicating with the top guide grooves, the bottom cap fixed to an underside of the bottom blade unit and sealing bottom portions of the bottom guide grooves, the bottom cap having an outlet defined centrally therethrough which communicates with the bottom guide grooves, the outlet communicating with the driving shaft, the collar enclosing two respectively peripheries of the bottom blade unit and the top blade unit so as to seal the top and bottom guide grooves, the top cap mounted onto the at least one second negative-pressure device, and   a case having a space defined therein and the driving member and the at least one second negative-pressure device being accommodated in the space, the case having at least one suction hole which communicates with the inlet via the orifices of the top cap.   
     
     
         2 . The device as claimed in  claim 1 , wherein the base is a float. 
     
     
         3 . The device as claimed in  claim 1 , wherein the base is a ring-shaped float. 
     
     
         4 . The device as claimed in  claim 1 , wherein the paths each is formed by a tube with a U-shaped cross section. 
     
     
         5 . The device as claimed in  claim 1 , wherein each path is formed on a plate. 
     
     
         6 . The device as claimed in  claim 1 , wherein each path is formed by a hollow tube which is inclined at an angle. 
     
     
         7 . The device as claimed in  claim 1 , wherein the main shaft and the driving shaft are fixed to each other by bolts. 
     
     
         8 . The device as claimed in  claim 1 , wherein the main shaft and the water suction member are connected to each other by bolts. 
     
     
         9 . The device as claimed in  claim 1 , wherein the driving member is a motor or an engine. 
     
     
         10 . The device as claimed in  claim 1 , wherein the driving shaft of the power unit and the main shaft are one-piece.