A fluidic device is disclosed, comprising an enclosed passage that is adapted to convey a circulating fluid. The enclosed passage comprises a flow unit having a first electrode and a second electrode offset from the first electrode in a downstream direction of a flow of the circulating fluid. The first electrode is formed as a grid structure and arranged to allow the circulating fluid to flow through the first electrode. The fluidic device may be used for controlling or regulating the flow of the fluid circulating in the enclosed passage, and thereby act as a valve opening, reducing or even closing the passage.

A fluidic device is disclosed, comprising an enclosed passage that is adapted to convey a circulating fluid. The enclosed passage comprises a flow unit having a first electrode and a second electrode offset from the first electrode in a downstream direction of a flow of the circulating fluid. The first electrode is formed as a grid structure and arranged to allow the circulating fluid to flow through the first electrode. The fluidic device may be used for controlling or regulating the flow of the fluid circulating in the enclosed passage, and thereby act as a valve opening, reducing or even closing the passage.

A pump assembly and a cooking appliance having a pump assembly are provided. The pump assembly may include a cavity that defines a cooking cavity; a water supplier installed outside of the cavity; a connection pipe connected to the water supplier; and a pump assembly disposed outside of the cavity and connected to the connection pipe. The pump assembly may includes at least one pump; and a support made of a flexible material and coupling the at least one pump to an upper surface of the cavity.

A pump assembly and a cooking appliance having a pump assembly are provided. The pump assembly may include a cavity that defines a cooking cavity; a water supplier installed outside of the cavity; a connection pipe connected to the water supplier; and a pump assembly disposed outside of the cavity and connected to the connection pipe. The pump assembly may includes at least one pump; and a support made of a flexible material and coupling the at least one pump to an upper surface of the cavity.

Some embodiments of the present disclosure relate to a method that includes disposing a vapor pump partially within an enclosure, such that the vapor pump is in fluid communication with the enclosure and an external environment, and where the enclosure comprises at least one vapor. In some embodiments, a portion of the at least one vapor is transferred with the vapor pump from the enclosure to the external environment. In some embodiments, a change in at least one parameter related to a mass of the at least one vapor within the enclosure is measured. In some embodiments, a rate of the portion of the at least one vapor transferred with the vapor pump from the enclosure to the external environment is calculated. In some embodiments, the rate of the portion of the at least one vapor transferred from the enclosure to the external environment with the vapor pump is calculated based on the change in the at least one parameter.

The negative pressure generator includes a chamber body with a suction nozzle; a piston, arranged inside the chamber body; and a driving device configured to drive the piston to reciprocated move inside the chamber body so as to generate negative pressure at the suction nozzle.

A vacuum pump system includes a first vacuum pump and a second vacuum pump connected to an exhaust port of the first vacuum pump. The second vacuum pump has a pump portion and a trap portion. The pump portion has a rotor. The trap portion is configured such that a reaction product generated from gas guided to an internal space from the exhaust port of the first vacuum pump by suction by the pump portion is accumulated thereon.

The present invention relates to a vehicle wheel comprising a hub, a rim and an inflatable tyre, in which the hub is situated around a rotation axle of the wheel, a compressor which is situated substantially inside the hub for compressing outside air, provided with an inlet for taking in air at atmospheric pressure and an outlet for delivering air at an increased pressure; a drive for driving the compressor, in which the drive is movable with respect to the rotation axle, in particular rotatable, more particularly rotatable in a direction opposite to that of the hub; an air reservoir for storing the air at increased pressure, in which the air reservoir is situated inside the rim of the wheel; a connection for connecting the outlet of the compressor to the air reservoir of the inflatable tyre of the wheel.

The present invention relates to a vehicle wheel comprising a hub, a rim and an inflatable tyre, in which the hub is situated around a rotation axle of the wheel, a compressor which is situated substantially inside the hub for compressing outside air, provided with an inlet for taking in air at atmospheric pressure and an outlet for delivering air at an increased pressure; a drive for driving the compressor, in which the drive is movable with respect to the rotation axle, in particular rotatable, more particularly rotatable in a direction opposite to that of the hub; an air reservoir for storing the air at increased pressure, in which the air reservoir is situated inside the rim of the wheel; a connection for connecting the outlet of the compressor to the air reservoir of the inflatable tyre of the wheel.

A piston of an air compressor contains at least one fixing bolt configured to fix a plane of a top of a head of the piston in at least one air stop sheet. A respective one of the at least one air stop sheet includes at least one bending section and at least one acting zone opposite to the at least one bending section and configured to cover at least one air orifice, and a back surface of the at least one acting zone of the respective one air stop sheet turns on relative to the plane of the top of the head at an open angle θ, thus producing an air flowing space. A pressure of a cylinder balances with atmosphere, and the piston is not stopped by a back-pressure resistance to move smoothly in upward and downward moving strokes after the air stop sheet moves again.