A tubephragm pump includes a tubephragm that has a pump head portion that forms a pump chamber, a driving head that holds the tubephragm and expands and contracts the pump chamber by directly pressing and pulling the pump head portion in a direction intersecting with a transfer direction of a transfer fluid, a driving unit that drives the driving head back and forth in a driving direction to expand and contract the pump chamber, and a control unit that controls the driving unit. The tubephragm is in a flat shape with a cross-sectional shape intersecting with the transfer direction of the transfer fluid of the pump chamber having a length in a direction intersecting with the driving direction longer than a length in the driving direction. A pair of liquid contacting surfaces opposing in the driving direction of the pump chamber move while maintaining a parallel state.

A fluid control apparatus includes a first major plate, a piezoelectric device, a second major plate, a peripheral plate, a first film, and a second film. The first film is provided on a side of the first major plate that faces a pump chamber. The first film is provided on a first major surface in such a manner as to have a movable portion one end of which serves as a movable end. The second film is provided on a side of the second major plate that faces the pump chamber. The second film is provided on a third major surface in such a manner as to have a movable portion one end of which serves as a movable end. The first film and the second film are positioned between a first opening provided in the first major plate and a second opening provided in the second major plate.

A miniature pump including a first chamber, a second chamber, a deformable membrane provided within the second chamber that divides the second chamber into first and second sub-chambers, the second sub-chamber defining a reservoir configured to contain liquid to be dispensed, a passage that connects the first chamber to the first sub-chamber, and an outlet in fluid communication with the reservoir, wherein pressurized fluid within the first internal chamber flows through the passage and into the first sub-chamber to compress the deformable membrane and cause liquid contained within the reservoir to flow out from the reservoir through the outlet and wherein the deformable membrane does not generate significant restoring forces when it is deformed and, therefore, will not return to its initial undeformed shape unless the reservoir is refilled.

A diaphragm for use in a pump includes a cover configured to contact fluid to pump the fluid and a backing disposed at least partially within the cover. The backing includes a flexible plate that extends outward relative to a core of the backing, the flexible plate configured to flex during reciprocation of the diaphragm. The cover is formed from a first polymer and the flexible plate is formed from a second polymer.

An air quality notification device is disclosed. The air quality notification device includes an actuating and sensing module, a microprocessor, a first communication module and a power source. The actuating and sensing module includes a sensor and an actuating device. The actuating device is disposed near the sensor. The sensor senses air transmitted by the actuating device to generate air quality information. The microprocessor is electrically connected to the actuating and sensing module. The first communication module is electrically connected to the actuating and sensing module to receive and transmit the air quality information. The power source is electrically connected to the microprocessor.

An air quality notification device is disclosed. The air quality notification device includes an actuating and sensing module, a microprocessor, a first communication module and a power source. The actuating and sensing module includes a sensor and an actuating device. The actuating device is disposed near the sensor. The sensor senses air transmitted by the actuating device to generate air quality information. The microprocessor is electrically connected to the actuating and sensing module. The first communication module is electrically connected to the actuating and sensing module to receive and transmit the air quality information. The power source is electrically connected to the microprocessor.

In one general aspect, the present application relates to a leak detection device that includes a body, a liquid separator, and a liquid level detector. The body includes an airflow inlet, an airflow outlet, and a liquid reservoir. The airflow outlet is arranged to substantially align with the airflow inlet. The liquid reservoir is formed in a bottom portion of the body. The liquid separator is positioned directly between the airflow inlet and the airflow outlet. The liquid separator divides an airflow path from the airflow inlet to the airflow outlet into at least two separate flow paths around the liquid separator. The liquid level detector is at least partially contained within a channel defined within a lower portion of the liquid separator, where the channel is in liquid communication with the liquid reservoir.

Disclosed is a valve-less micro pump configuration that includes plural micro pump elements, each including a pump body having a compartmentalized pump chamber, with plural unobstructed inlet ports and outlet ports and a plurality of membranes disposed in the pump chamber to provide compartments. The membranes are anchored between opposing walls of the pump body and carry electrodes disposed on opposing surfaces of the membranes and walls of the pump body.

A diaphragm pump is revealed. The diaphragm pump includes a pump device, a pump body, a top cover, and an air release valve head. The pump body includes at least two air inlet passages, at least one air outlet passage and at least one leak-proof/sealing passage, all selectively communicating with one cavity. The top cover includes a valve port, an air vent and an air outlet duct. Air pressure in the leak-proof passage acts on the air release valve head so that the valve port is closed by the air release valve head while the pump device is pumping air. The air release valve head and the valve port are separated from each other and then the valve port is communicating with the air outlet duct when the pump device stops pumping air. The pump performance is improved and no air release valve is required.

A fluid pump for pumping a fluid from an inlet toward an outlet comprises a pump body, a pump diaphragm, and a valve seat. The pump body has a first opening and a second opening. The pump diaphragm is attached to the pump body and forms a pump chamber between the pump body and the pump diaphragm. The pump chamber is fluidly connected to the inlet by the first opening and to the outlet by the second opening. The valve seat is disposed inside the pump chamber and around the second opening. The valve seat protrudes with an undeformed height from the second opening into the pump chamber in a direction toward the pump diaphragm. The valve seat has an elastic body and a gasket with a sealing surface. The pump diaphragm is deflectable and is adapted to open and close a fluidic pathway of the outlet by moving into and out of contact with the valve seat.