Operating device, method for operating an operating device, diaphragm pump having an operating device and a diaphragm pump device, and a blood treatment apparatus having a diaphragm pump

Patent metadata

Field	Value
Publication number	US-11441554-B2
Application number	US-201716470564-A
Country	US
Kind code	B2
Filing date	Dec 18, 2017
Priority date	Dec 21, 2016
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

An actuating device mechanically controls a membrane pump device. The device includes a base body having a mounting face for a membrane pump device and through which a control fluid line passes that extends from a control fluid port to a control fluid opening that opens at the mounting face. A control fluid valve arranged in the control fluid line influences a cross-section of the control fluid line and has an adjustment device that has a fluid actuator arranged on the mounting face. A working fluid valve influences a cross-section of a working fluid line that passes through the base body. The control fluid valve and the working fluid valve are electrically connected to a control device that electrically controls the control fluid valve and the working fluid valve. Moreover, a membrane pump is provided that has an actuating device and a membrane pump device.

First claim

The invention claimed is:

1. An actuating device for mechanically controlling a membrane pump device for conveying fluids, the actuating device comprising a base body that comprises a mounting face for mounting a membrane pump device and through which a control fluid line passes, the control fluid line extending from a control fluid port to a control fluid opening that opens at the mounting face, a control fluid valve arranged in the control fluid line and designed to influence a cross section of the control fluid line, an adjustment device that comprises a fluid actuator arranged on the mounting face for providing an adjustment movement, and a working fluid valve that is designed to influence a cross section of a working fluid line that passes through the base body, wherein
the working fluid valve is fluidically coupled to the adjustment device via the working fluid line,
a working fluid pressure sensor is arranged in the working fluid line and is configured to detect a working fluid pressure in the working fluid line,
the control fluid valve, the working fluid valve, and the working fluid pressure sensor are electrically connected to a control device that is designed to electrically control the control fluid valve and the working fluid valve,
a control fluid pressure sensor is arranged on the base body, and
the control fluid pressure sensor is electrically connected to the control device and is designed to detect a control fluid pressure.

2. The actuating device according to claim 1 , wherein the control device includes an observer algorithm and is configured such that, on the basis of the observer algorithm, a mass flow rate of fluid of the membrane pump device is determined depending on pressure signals from the control fluid pressure sensor.

3. The actuating device according to claim 1 , wherein a concave control chamber is formed on the mounting face as a movement chamber for a pump membrane, and the control fluid opening opens at a surface of the control chamber.

4. The actuating device according to claim 1 , wherein the working fluid line is fluidically connected to the control fluid port.

5. A membrane pump for conveying fluids, comprising the actuating device and the membrane pump device according to claim 1 .

6. The membrane pump according to claim 5 , wherein the membrane pump device has:
a pump chamber body in which there is formed a recess that is closed by a resilient membrane to form a pump chamber,
an inflow path that connects an input port to an inlet opening of the pump chamber,
an outflow path that connects an outlet opening of the pump chamber to an output port,
an inlet valve provided in the inflow path for influencing the flow of liquid in the inflow path, and
an outlet valve provided in the outflow path for influencing the flow of liquid in the outflow path.

7. A blood treatment device having a container for providing a medical liquid, and the membrane pump according to claim 5 for conveying a medical liquid.

8. The blood treatment device of claim 7 , wherein said blood treatment device is a dialysis device.

9. The blood treatment device of claim 7 , wherein said medical liquid is an anticoagulation solution.

10. The membrane pump of claim 5 , wherein said conveying fluids are medical liquids for blood treatment.

11. The actuating device of claim 1 , wherein said conveying fluids are medical liquids for blood treatment.

12. An actuating device for mechanically controlling a membrane pump device for conveying fluids, the actuating device comprising a base body that comprises a mounting face for mounting a membrane pump device and through which a control fluid line passes, the control fluid line extending from a control fluid port to a control fluid opening that opens at the mounting face, a control fluid valve arranged in the control fluid line and designed to influence a cross section of the control fluid line, an adjustment device that comprises a fluid actuator arranged on the mounting face for providing an adjustment movement, and a working fluid valve that is designed to influence a cross section of a working fluid line that passes through the base body, wherein
the control fluid valve and the working fluid valve are electrically connected to a control device that is designed to electrically control the control fluid valve and the working fluid valve,
a vacuum line is formed in the base body,
the vacuum line extends from a vacuum port to a control chamber or to the control fluid line,
a vacuum valve is arranged in the control fluid line and is designed to influence a cross section of the vacuum line,
the vacuum valve is electrically connected to the control device,
a control fluid pressure sensor is arranged on the base body, and
the control fluid pressure sensor is electrically connected to the control device and is designed to detect a control fluid pressure.

13. An actuating device for mechanically controlling a membrane pump device for conveying fluids, the actuating device comprising a base body that comprises a mounting face for mounting a membrane pump device and through which a control fluid line passes, the control fluid line extending from a control fluid port to a control fluid opening that opens at the mounting face, a control fluid valve arranged in the control fluid line and designed to influence a cross section of the control fluid line, a first adjustment device and a second adjustment device each arranged on the base body and each comprising a respective fluid actuator arranged on the mounting face for providing an adjustment movement, the first adjustment device having a first working fluid valve and the second adjustment device having a second working fluid valve, the first working fluid valve and the second working fluid valve are each designed to influence a cross section of at least one working fluid line that passes through the base body, wherein the control fluid valve, the first working fluid valve, and the second working fluid valve are electrically connected to a control device that is designed to electrically control the control fluid valve, the first working fluid valve, and the second working fluid valve, the first working fluid valve is in the form of a switch valve and the second working fluid valve is in the form of a proportional valve.

14. The actuating device according to claim 13 , wherein the control device is configured such that the second working fluid valve is controlled by the control device, the control device determines a mass flow rate of fluid in the membrane pump device, and the control device determines a target pressure value for the second working fluid valve, depending on the determined mass flow rate of fluid, in such a manner that a constant mass flow rate of fluid is generated during a discharge phase of the membrane pump device.

15. The actuating device of claim 13 , wherein the second working fluid valve is in the form of a pressure regulating valve.

16. A method for operating an actuating device for mechanically controlling a membrane pump device, the actuating device comprising a base body that comprises a mounting face for mounting a membrane pump device and through which a control fluid line passes, the control fluid line extending from a control fluid port to a control fluid opening that opens at the mounting face, a control fluid valve arranged in the control fluid line and designed to influence a cross section of the control fluid line, an adjustment device that comprises a fluid actuator arranged on the mounting face for providing an adjustment movement, and a working fluid valve that is designed to

Assignees

• Fresenius Medical Care Deutschland Gmbh

Inventors

• Anderle Jens
• Wirtl Hannes

Classifications

• F04B43/0733 Primary

  with fluid-actuated pump inlet or outlet valves; with two or more pumping chambers in series · CPC title

• F04B2201/12

  Parameters of driving or driven means · CPC title

• F04B43/06

  Pumps having fluid drive · CPC title

• A61M60/268

  the displacement member being flexible, e.g. membranes, diaphragms or bladders · CPC title

• F04B43/073 Primary

  the actuating fluid being controlled by at least one valve · CPC title