Provided are an electroosmotic pump, including: a membrane; a first electrode which is provided on one surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support; and a second electrode which is provided on the other surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support, and a fluid-pumping system including the electroosmotic pump.

The present invention provides a microfluidic pump-based infusion anomaly state detection and control system, comprising: a microfluidic pump chip configured to control the vibration of an actuating device to output a liquid; a pressure sensor located in a pipeline behind the outlet of the microfluidic pump chip and configured to sense the change of the pressure of the liquid output by the microfluidic pump chip to output an electric signal; a signal conditioning circuit configured to perform signal conditioning on the electric signal to obtain a conditioned electric signal; a signal acquisition circuit configured to convert the conditioned electric signal from an analog signal into a digital signal; a signal processing unit configured to determine the working state of the microfluidic pump chip and the working state of an infusion pipeline according to the digital signal, and to send a signal to an alarming unit when an anomaly is found; the alarming unit configured to alarm according to the signal; and a control drive unit configured to adjust the output state of the microfluidic pump chip according to the output of the signal processing unit. The present invention can precisely control a microfluidic pump chip and accurately detect the anomaly state of the microfluidic pump chip and alarm in time.

The present invention relates to the technical field of microfluidics, and specifically relates to an electroosmotic micropump apparatus and an electroosmotic micropump apparatus group. The electroosmotic micropump apparatus in the present invention comprises fluid micro channels and a microneedle electrode; each fluid micro channel is used for communicating a micro flow channel inlet with a micro flow channel outlet for pumping a fluid; the microneedle electrode comprises a first microneedle type electrode and a second microneedle type electrode that are respectively provided at the micro flow channel inlet and the micro flow channel outlet; the first microneedle type electrode and the second microneedle type electrode are oppositely arranged; moreover, neither of the first microneedle type electrode and the second microneedle type electrode is in conduction with the fluid micro channel. The electroosmotic micropump apparatus of the present invention can provide a parallel and uniform electric field for the interior of the fluid micro channel and generate a stable electroosmotic driving force, and can solve the hydrolysis problem of the surface of an electrode, thereby greatly improving the stability of the running of a micropump and prolonging the service life of the micropump.

Provided are a membrane-electrode assembly for an electroosmotic pump, the membrane-electrode assembly including a first electrode having a porous structure, containing a first electrochemical reactant, and having applied thereto a (+) or (−) voltage; a first membrane provided on one surface of the first electrode, having a porous structure, and having a (+) or (−) zeta potential; a second electrode provided on one surface of the first membrane opposite to a side of the first electrode, having a porous structure, containing a second electrochemical reactant, and having applied thereto a voltage having a polarity opposite to that of the voltage applied to the first electrode; a second membrane provided on one surface of the second electrode opposite to a side of the first membrane, having a porous structure, and having a zeta potential opposite to that of the zeta potential of the first membrane; and a third electrode provided on one surface of the second membrane opposite to a side of the second electrode, having a porous structure, containing a third electrochemical reactant, and having applied thereto a voltage having a polarity same as that of the voltage applied to the first electrode and a fluid pumping system including the electroosmotic pump.

A micropump implantable in an eye is presented. In some aspects, the micropump includes a ferromagnetic member, a power source, and a motor coil magnetically coupled to the ferromagnetic member and electrically coupled to the power source to receive power from the power source. The motor coil is configured to generate a magnetic field in the ferromagnetic member when power is applied to the motor coil by the power source. In some embodiments, a hermetically sealed housing encloses the motor coil and the power source and partially encloses the ferromagnetic member. The micropump further includes a pump diaphragm and a compression chamber. The micropump further includes an armature configured to move in response to the magnetic field in the ferromagnetic member and a plunger configured to cause fluid to flow through the compression chamber from an inlet to an outlet.

A method of pumping an aqueous fluid through an electroosmotic membrane situated between a cathode and an anode includes oxidizing water to O.sub.2 at the anode and reducing O.sub.2 at the cathode. A potential difference E between the cathode and the anode is 1.4 V or less.

Disclosed is a bi-directional exhalation valve useful for many applications such as in CPAP devices. The exhalation valve includes a valve body having a center chamber, side chambers, and bidirectional ports coupled to the center chamber via passages and a mechanism that provides fluid ingress into the bi-directional valve in a first mode of operation or fluid egress from the bi-directional valve in a second mode of operation. Unidirectional ports are coupled to the plurality of bidirectional ports to provide providing fluid egress from the valve in the second mode of operation, and a unidirectional port provides fluid ingress into the bi-directional valve in the first mode of operation. A mechanism including a center paddle, side paddles, and a shaft are arranged in an elongated compartment of the valve body, such that the shaft is pivots and the central and side paddles open and close corresponding ones of the input and output ports.

Provided are an electroosmotic pump including a membrane; a first electrode disposed on a surface of the membrane and including a first porous support including a first conductor and a first precious metal and a first conductive polymer positioned in or on at least some of pores and surfaces of the first porous support; and a second electrode disposed on another surface of the membrane and including a second porous support including a second conductor and a second precious metal and a second conductive polymer positioned in or on at least some of pores and surfaces of the second porous support, a method of manufacturing the electroosmotic pump, and a fluid pumping system including the electroosmotic pump.

A microfluidic device is provided. In one aspect, the microfluidic device includes a microfluidic channel, and a first actuator including an array of electrodes along the microfluidic channel. The first actuator is configured to generate a a potential wave along the microfluidic channel. Each electrode of the array can see its voltage changing cyclically according to a period multiplied by a natural number, wherein for at least one electrode the natural number equals 1. The cyclically changing voltages of adjacent electrodes can be out of phase. The cyclically changing voltages of every other electrode along the array can be in phase.

An aerosol-generating system may include a liquid storage portion configured to hold liquid aerosol-forming substrate, a vaporizer including a heating element with an internal passage at least partially defined by a surface of the heating element, and a micro pump configured to deliver liquid aerosol-forming substrate from the liquid storage portion to the internal passage of the heating element, such that the vaporizer is configured to heat the delivered liquid aerosol-forming substrate at the internal passage to a temperature sufficient to volatilize at least a part of the delivered liquid aerosol-forming substrate. The micro pump may be configured to deliver a particular amount of liquid aerosol-forming substrate to the internal passage based on the micro pump performing an individual pump cycle.