US 2021/0340969 A1 · IMPROVED MICROPUMP

Abstract

The micropump including a pump chamber which can be fluidly filled or emptied both by means of a passage opening and an inlet, the pump chamber being covered with a disk-shaped actuator so that the volume of the pump chamber can be changed by deflecting the actuator, the passage opening being arranged in a side of the pumping chamber opposite the actuator, and the inlet has a smaller or similar flow resistance compared to the through opening. An entrance to the passage opening can be closed by means of the deflected actuator, so that a valve is formed in the basic state, or closed by means of the undeflected actuator, so that a valve is formed in the basic state. The micropump can have a second pump chamber with an actuator and inlet, the passage opening of which is connected to that of the first pump chamber.

Claims27

Dependent claims

Micropump having a small housing size, comprising a pump chamber (21), which can be fluidically filled or emptied by means of a passage opening (4) as well as an inlet (51), wherein the pump chamber (21) is covered with a disk-shaped actuator (11;

11′), so that the volume of the pump chamber (21) can be changed by deflecting the actuator (11;
11′), wherein the passage opening (4) is arranged in a side (61) of the pump chamber (21) which is opposing to the actuator (11;
11′), and wherein the inlet (51) has, compared to the passage opening (4), a smaller or similar flow resistance, and wherein one entrance (31), with respect to the passage opening (4),
can be closed by means of the deflected actuator (11), so that a valve is formed which is open in a basic state, or
can be closed by means of the undeflected actuator (11′), so that a valve is formed which is closed in a basic state,
characterized in that the micropump has a second pump chamber (22) with actuator (12;
12′) and inlet (52), the passage opening (4) of which being connected to the one of the first pump chamber (21).

4 more elements

Micropump according to any of the preceding claims, wherein the pump chamber's (21, 22) side (61), 62) which is opposing to the actuator (11, 12;

11′, 12′) and which comprises the passage opening has, at least in the region of the passage opening (4), the negative shape of the undeflected actuator (11′, 12′).

Micropump according to any of the preceding claims, wherein the inlet (51, 52) as well is located in the side (61, 62) which is opposing to the actuator (11, 12;

11′, 12′).

Micropump according to any of the preceding claims, wherein the pump chamber's (21, 22) side (61, 62) which is opposing to the actuator (11, 12;

11′, 12′) and which comprises the passage opening, has entirely the negative shape of the deflected actuator (11, 12) or of the undeflected actuator (11′, 12′).

Micropump according to any of the preceding claims, wherein a housing which comprises the actuators (11, 12;

11′, 12′) is not larger than 5 cm×2 cm×1 cm.

Micropump according to any of the preceding claims, wherein the same has at least on one of the actuators (11, 12;

11′, 12′) a sensor for the detection of impact of its pump chamber (21, 22) facing side.

Valve system for controlling a fluid flow, comprising the components according to any of the preceding claims, wherein the valve system comprises four stages which are formed by the inlet (51) and the first actuator (11;

11′), the first actuator (11;
11′) and the passage opening (4), the passage opening (4) and the second actuator (12;
12′), as well as the second actuator (12;
12′) and the inlet (52).

1 more element

Dependencies are inferred from the claim text.

Improved micropump

Life of this patent

Improved micropump

Life of this patent

Abstract

Claims27