Patent DE-102009050979-A1 (DE)
Title: Device for controlling a fluid flow, comprises a substrate having fluid providing area that branches itself into first and second fluid channels, where a first fluid chamber is fluidically coupled with the fluid providing area
Inventor: DANIEL MARK
IPC: F15C3/00
Filed: 2009-10-28
Abstract: The device for controlling a fluid flow, comprises a substrate having a fluid provision area (50) that branches itself into a first fluid channel (60) and a second fluid channel (62), where a first fluid chamber (52) is fluidically coupled with the fluid provision area over the first fluid channel, and a drive unit that is arranged in order to cause a first rotation of the substrate with a rotation speed to drive a fluid centrifugal out from the fluid provision area through the first fluid channel in the first fluid chamber. The device for controlling a fluid flow, comprises a substrate having a fluid provision area (50) that branches itself into a first fluid channel (60) and a second fluid channel (62), where a first fluid chamber (52) is fluidically coupled with the fluid provision area over the first fluid channel, and a drive unit that is arranged in order to cause a first rotation of the substrate with a rotation speed to drive a fluid centrifugal out from the fluid provision area through the first fluid channel in the first fluid chamber, where an aeration of the first fluid chamber is carried out through the first fluid channel or other aeration channel, and a residual gas volume remains in the first fluid chamber, and in order to cause a second rotation of the substrate to drive a fluid centrifugal out from the fluid provision area through the second fluid channel in the second fluid chamber. The aeration is carried out through the first fluid chamber during the first rotation and the second rotation is carried out subsequently with another rotation speed in which the aeration of the first fluid chamber is carried out through the first fluid channel so that the residual gas volume remaining in the first fluid chamber exerts a counter pressure on the fluid, which flows through the second fluid channel, or during the first rotation, the aeration is carried out through another aeration channel based on the centrifugal power of another aeration channel lifting during the second rotation is closed, and the aeration of the first fluid chamber is carried out through the first fluid channel so that the residual gas volume remaining in the first fluid chamber exerts the counter pressure on the fluid, which flows through the second fluid channel. The first and the second fluid channel are arranged in such away that energy in order to drive the fluid centrifugal through the first fluid channel is greater than energy in order to drive the fluid centrifugal through the second fluid channel. The second fluid channel has a section extending radially towards inside from an area in which the fluid provision area branches in to first and second fluid channel. The second fluid channel flows in a first fluid chamber. The fluid provision area has a fluid channel extending radially towards outside from an inlet chamber, where the fluid channel branches itself in the first and second fluid channel. The first fluid chamber is fluidically connected with reception of the first fluid channel. An aeration channel fluidically connects the first fluid chamber with an aeration opening. The centrifugal force appearing during the second rotation contributes so that a switching fluid is provided in the aeration channel between the first fluid chamber and the aeration opening in order to connect the aeration channel. The aeration channel has a first section that extends itself from the first fluid chamber to a branching, and a second section that extends itself from the branching to the aeration opening. The aeration opening branches itself at the branching in the second section and a switching channel. The switching channel extends between the branching and a switching chamber. The first rotation is carried out with a rotation speed in which the switching fluid is completely driven from the aeration channel into the switching channel so that the aeration channel is open. The second rotation is carried out with a rotation speed so that a part of the switching fluid is provided in the second section of the aeration channel and locks the ventilation channel. The first and second rotations have same rotation direction. The first rotation speed is greater than the second rotation speed. Independent claims are included for: (1) a method for controlling a fluid flow; and (2) a device for locking an aeration channel.