Fluid transportation device

Abstract

A fluid transportation device includes a valve seat, a valve cap, a valve membrane, multiple buffer chambers, a vibration film and an actuator. The valve membrane is arranged between the valve seat and the valve cap, and includes several hollow-types valve switches, which includes at least a first valve switch and a second valve switch. The multiple buffer chambers include a first buffer chamber between the valve membrane and the valve cap and a second buffer chamber between the valve membrane and the valve seat. The vibration film is separated from the valve cap when the fluid transportation device is in a non-actuation status, thereby defining a pressure cavity. The actuator is connected to the vibration film. When the actuator is driven to be subject to deformation, the vibration film connected to the actuator is transmitted to render a volume change of the pressure cavity and result in a pressure difference for moving the fluid.

1 . A fluid transportation device for transporting a fluid, said fluid transportation device comprising:
 a valve seat having an inlet channel and an outlet channel;   a valve cap disposed on said valve seat;   a valve membrane having substantially uniform thickness, arranged between said valve seat and said valve cap, and comprising several hollow-types valve switches, which includes at least a first valve switch and a second valve switch;   multiple buffer chambers including a first buffer chamber between said valve membrane and said valve cap and a second buffer chamber between said valve membrane and said valve seat;   a vibration film having a periphery fixed on said valve cap, wherein said vibration film is separated from said valve cap when said fluid transportation device is in a non-actuation status, thereby defining a pressure cavity; and   an actuator connected to said vibration film, wherein when said actuator is driven to be subject to deformation, said vibration film connected to said actuator is transmitted to render a volume change of said pressure cavity and result in a pressure difference for moving said fluid to be introduced from said inlet channel, flowed through said first valve switch, said first buffer chamber, said pressure cavity, said second buffer chamber and said second valve switch, and exhausted from said outlet channel.   
   
   
       2 . The fluid transportation device according to  claim 1  wherein said valve seat and said valve cap have several recess structures, and said fluid transportation device further comprises several sealing rings received in corresponding recess structures but partially protruded from said recess structures so as to provide a pre-force on said valve membrane. 
   
   
       3 . The fluid transportation device according to  claim 1  wherein said valve membrane has a thickness of 10 μm to 50 μm. 
   
   
       4 . The fluid transportation device according to  claim 1  wherein said valve membrane has a thickness of 21 μm to 40 μm. 
   
   
       5 . The fluid transportation device according to  claim 1  wherein said valve membrane is made of polymeric material having an elastic modulus of 2 to 20 GPa. 
   
   
       6 . The fluid transportation device according to  claim 1  wherein said valve membrane is made of metallic material having an elastic modulus of 2 to 240 GPa. 
   
   
       7 . The fluid transportation device according to  claim 1  wherein said actuator is a piezoelectric strip having a thickness of 100 μm to 500 μm. 
   
   
       8 . The fluid transportation device according to  claim 1  wherein said actuator is a piezoelectric strip having a thickness of 150 μm to 250 μm. 
   
   
       9 . The fluid transportation device according to  claim 1  wherein said vibration film is a single-layered metallic structure. 
   
   
       10 . The fluid transportation device according to  claim 1  wherein said vibration film is a two-layered structure, which includes a metallic layer and a biochemical-resistant polymeric sheet attached on said metallic layer. 
   
   
       11 . The fluid transportation device according to  claim 1  wherein said vibration film has a thickness of 10 μm to 300 μm. 
   
   
       12 . The fluid transportation device according to  claim 1  wherein said vibration film has a thickness of 100 μm to 250 μm. 
   
   
       13 . The fluid transportation device according to  claim 1  wherein said pressure cavity has a depth of 100 μm to 300 μm and a diameter of 10 mm to 30 mm. 
   
   
       14 . A fluid transportation device for transporting a fluid, said fluid transportation device comprising:
 a valve seat having an inlet channel, an outlet channel and at least one recess structure;   a valve cap disposed on said valve seat and comprising at least one recess structure;   a valve membrane having substantially uniform thickness of 10 μm to 50 μm, arranged between said valve seat and said valve cap, and comprising several hollow-types valve switches, which includes at least a first valve switch and a second valve switch;   multiple buffer chambers including a first buffer chamber between said valve membrane and said valve cap and a second buffer chamber between said valve membrane and said valve seat;   a vibration film having a periphery fixed on said valve cap, wherein said vibration film is separated from said valve cap when said fluid transportation device is in a non-actuation status, thereby defining a pressure cavity;   several sealing rings received in corresponding recess structures of said valve seat and said valve cap but partially protruded from said recess structures so as to provide a pre-force on said valve membrane; and   an actuator connected to said vibration film, wherein when said actuator is driven to be subject to deformation, said vibration film connected to said actuator is transmitted to render a volume change of said pressure cavity and result in a pressure difference for moving said fluid to be introduced from said inlet channel, flowed through said first valve switch, said first buffer chamber, said pressure cavity, said second buffer chamber and said second valve switch, and exhausted from said outlet channel.   
   
   
       15 . A fluid transportation device for transporting a fluid, said fluid transportation device comprising:
 a valve seat having an inlet channel, an outlet channel and at least one recess restructure;   a valve cap disposed on said valve seat and comprising at least one recess restructure;   a valve membrane having substantially uniform thickness of 10 μm to 50 μm, arranged between said valve seat and said valve cap, and comprising several hollow-types valve switches, which includes at least a first valve switch and a second valve switch;   multiple buffer chambers including a first buffer chamber between said valve membrane and said valve cap and a second buffer chamber between said valve membrane and said valve seat;   a vibration film having a periphery fixed on said valve cap, wherein said vibration film is separated from said valve cap by a gap of 100 μm to 300 μm when said fluid transportation device is in a non-actuation status, thereby defining a pressure cavity;   several sealing rings received in corresponding recess structures of said valve seat and said valve cap but partially protruded from said recess structures so as to provide a pre-force on said valve membrane; and   an actuator connected to said vibration film, wherein when said actuator is driven to be subject to deformation, said vibration film connected to said actuator is transmitted to render a volume change of said pressure cavity and result in a pressure difference for moving said fluid to be introduced from said inlet channel, flowed through said first valve switch, said first buffer chamber, said pressure cavity, said second buffer chamber and said second valve switch, and exhausted from said outlet channel.