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AssigneeFresenius Medical Care Deutschland GmbH
InventorsJens Anderle, Hannes Wirtl
Estimating the term…
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.
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
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
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.
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 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, wherein on the basis of an observer algorithm, the control device determines a mass flow rate of fluid in the membrane pump device depending on pressure signals of a control fluid pressure sensor, and the control device determines a target pressure value for the working fluid valve depending on the determined mass flow rate of fluid, in order to ensure a constant mass flow rate of fluid during a discharge phase of the membrane pump device.
Dependencies are inferred from the claim text.