Electro-osmotic pump using reversible electrode reaction and fluid pumping system using same

Patent metadata

Field	Value
Publication number	US-10156227-B2
Application number	US-201314761063-A
Country	US
Kind code	B2
Filing date	Dec 18, 2013
Priority date	Jan 15, 2013
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

An electro-osmotic pump using a reversible electrode reaction is provided, the electro-osmotic pump using a reversible electrode reaction comprising: a membrane that allows movement of a fluid; and first and second electrodes that are arranged on both sides of the membrane, respectively, and composed of a porous material or structure to allow the movement of the fluid, and a material to cause a reversible electrochemical reaction, wherein the first and second electrodes are alternately and reversely supplied with a voltage to make the electrochemical reaction repeat alternately forward and backward, and as a result, the alternate change of the movement direction of the fluid generates a pumping force to repair the first and second electrodes.

First claim

I claim:

1. A fluid pumping system, comprising:
an electro-osmotic pump comprising: a membrane that allows movement of a fluid; first and second electrodes that are arranged on both sides of the membrane, respectively, and composed of a porous material or structure to allow the movement of the fluid and a material to cause a reversible electrochemical reaction; and a power supply that alternately and reversely supplies a voltage to the first and second electrodes, to provide a pumping force to a transfer target fluid;
a separator that is provided in at least one end of the electro-osmotic pump to separate the fluid and the transfer target fluid from each other;
a first valve provided near a first end of a transfer line that is connected to a transfer target fluid source;
a second valve provided near a second end of the transfer line that is connected to the outside of the fluid pumping system; and
a pumping line that is branched from the transfer line between the first and second valves to be connected to the electro-osmotic pump and delivers the pumping force to the transfer line,
wherein the first and second electrodes are alternately and reversely supplied with a voltage to make the electrochemical reaction repeat alternately forward and backward, and as a result, a suction force and a discharge force are repeatedly delivered to the transfer target fluid through the separator due to the repeated forward and backward movement of the fluid, and
wherein the first and second valves are opened and closed to allow or restrict the flow of the transfer target fluid.

2. The fluid pumping system of claim 1 ,
wherein the electrochemical reaction is repeated alternately in the forward direction and the backward direction to repeat consumption and restore the capacity of each of the first and second electrodes, and maintain the original state of the electrodes.

3. The fluid pumping system of claim 1 ,
wherein the power supply comprises:
a DC supply device that supplies a DC voltage to each of the first and second electrodes; and
a voltage direction switching device that alternately and reversely switches the DC voltage supplied to each of the first and second electrodes every set time.

4. The fluid pumping system of claim 1 ,
wherein the opening and the closing of the first and second valves are operated reversely.

5. The fluid pumping system of claim 1 ,
wherein the first and second valves are check valves,
wherein when the suction force is delivered to the transfer target fluid, the first valve is opened, and the second valve is closed,
wherein when the discharge force is delivered to the transfer target fluid, the first valve is closed, and the second valve is opened.

6. The fluid pumping system of claim 1 , further comprising
a first stopper and a second stopper that are provided to restrict a movement distance of the separator, when the separator moves due to the movement of the fluid,
wherein the first stopper is provided at one side of the separator and the second stopper is provided at the other side of the separator.

7. The fluid pumping system of claim 1 ,
wherein the separator comprises one of a diaphragm, a polymer film, and a slider.

Assignees

• Univ Sogang Res Foundation

Inventors

• Shin Woonsup

Classifications

• F04B43/067 Primary

  the fluid being actuated directly by a piston · CPC title

• F04B19/006

  Micropumps (F04B43/043 and F04B43/095 take precedence) · CPC title

• Y10T137/2218

  Means [e.g., valve] in control input · CPC title

• F04B17/003 Primary

  driven by piezoelectric means (F04B43/046 and F04B43/095 take precedence) · CPC title

• A61K9/0004

  Osmotic delivery systems; Sustained release driven by osmosis, thermal energy or gas · CPC title