Methods and devices for modulation of the operating point of liquid pumps in medical treatment devices
First Claim
Patent Images
1. A device for controlling a pump, said device comprising:
- a centrifugal pump;
a medication dosing device; and
a control unit,said medication dosing device being actuated by the centrifugal pump, andsaid control unit controlling the centrifugal pump to create, in a controlled manner, pressure pulses which effect a controlled dispensing of the medication from the medication dosing device, with the control unit controlling the centrifugal pump by changing an operating point of the centrifugal pump according to a profile,said profile including a first change from a first operating point to a second operating point, and a second change from the second operating point to the first operating point or to a third operating point,the second operating point being associated with an operating parameter which is greater than or less than the operating parameter is when associated with the first operating point and the third operating point.
1 Assignment
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Accused Products
Abstract
Fluid pumps and medical treatment devices, in particular dialysis machines, include devices configured such that operating pressures and flow rates of the fluid pumps assume desired characteristics, in particular constant values or controlled profiles. The operating point of a peristaltic hose roller pump is adjusted based on an angle of rotation of a pump rotor, or by adjusting the operating point of a centrifugal pump in accordance with a profile.
13 Citations
14 Claims
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1. A device for controlling a pump, said device comprising:
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a centrifugal pump; a medication dosing device; and a control unit, said medication dosing device being actuated by the centrifugal pump, and said control unit controlling the centrifugal pump to create, in a controlled manner, pressure pulses which effect a controlled dispensing of the medication from the medication dosing device, with the control unit controlling the centrifugal pump by changing an operating point of the centrifugal pump according to a profile, said profile including a first change from a first operating point to a second operating point, and a second change from the second operating point to the first operating point or to a third operating point, the second operating point being associated with an operating parameter which is greater than or less than the operating parameter is when associated with the first operating point and the third operating point. - View Dependent Claims (2, 3, 4)
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5. A medical machine comprising:
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a device for controlling a pump, said device including a centrifugal pump; a medication dosing device; and a control unit, said medication dosing device being actuated by the centrifugal pump, and said control unit controlling the centrifugal pump to create, in a controlled manner, pressure pulses which effect a controlled dispensing of the medication from the medication dosing device, with the control unit controlling the centrifugal pump by changing an operating point of the centrifugal pump according to a profile, said profile including a first change from a first operating point to a second operating point, and a second change from the second operating point to the first operating point or to a third operating point, the second operating point being associated with an operating parameter which is greater than or less than the operating parameter is when associated with the first operating point and the third operating point. - View Dependent Claims (6, 14)
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7. A method of controlling a pump, said method comprising:
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a step of changing an operating point of a centrifugal pump which actuates a medication dosing device, to create, in a controlled manner, pressure pulses which effect a controlled dispensing of the medication from the medication dosing device, with the step of changing conforming to a profile which includes a first change from a first operating point to a second operating point, and a second change from the second operating point to the first operating point or to a third operating point, the second operating point being associated with an operating parameter which is greater than or less than the operating parameter is when associated with the first operating point and the third operating point. - View Dependent Claims (8, 9, 10, 11)
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12. A method of controlling a medical machine having a control unit, said method comprising:
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changing an operating point of a centrifugal pump which actuates a medication dosing device, to create, in a controlled manner, pressure pulses which effect a controlled dispensing of the medication from the medication dosing device, with the change conforming to a profile which includes a first change from a first operating point to a second operating point, and a second change from the second operating point to the first operating point or to a third operating point, the second operating point being associated with an operating parameter which is greater than or less than the operating parameter is when associated with the first operating point and the third operating point. - View Dependent Claims (13)
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Specification