DEVICE AND METHOD FOR DISPENSING OR RECEIVING A LIQUID VOLUME
First Claim
1. A device for dispensing or receiving a liquid volume, comprising:
- a liquid container comprising an outlet;
a pressure generator which is implemented to provide a compressible gas volume with a constant amount of substance enclosed in the liquid reservoir with a pressure, wherein the gas volume is in direct or indirect fluidic contact with the liquid in the liquid reservoir;
a doser coupled to the outlet of the liquid reservoir and configured to be operated in order to enable the liquid to pass the outlet;
a pressure sensor for measuring a pressure existing in the gas volume and for outputting an output signal indicating the current pressure in the gas volume; and
a controller coupled to the pressure generator, the doser and the pressure sensor and which is implemented to;
control the pressure generator in order to change the pressure in the gas volume until the output signal of the pressure sensor indicates a first pressure, while the doser is not operated so that it prevents liquid from passing the outlet,operate the doser depending on the output signal of the pressure sensor in order to dispense or receive liquid through the outlet, andwhile dispensing or receiving liquid through the outlet, monitor the output signal of the pressure sensor and, depending on the monitored output signal of the pressure sensor, at least temporarily terminate the operation of the doser.
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Accused Products
Abstract
A device for dispensing or receiving a liquid volume comprises a liquid reservoir having an outlet, a pressure generation means which is implemented to provide a compressible enclosed gas volume of a constant amount of substance with a pressure, wherein the gas volume is in direct or indirect fluidic contact with the liquid in the liquid reservoir, a dosing means coupled to the outlet of the liquid reservoir and operable in order to enable the liquid to pass the outlet, a pressure sensor for measuring a current pressure in the gas volume and for outputting an output signal indicating the current pressure in the gas volume and a controller coupled to the pressure generation means, the dosing means and the pressure sensor. The controller is implemented to control the pressure generation means in order to change the pressure in the gas volume until the output signal of the pressure sensor indicates a first pressure, while the dosing means is not operated so that it prevents liquid from passing the outlet in order to operate the dosing means, depending on the output signal of the pressure sensor, to dispense or receive liquid through the outlet and, during dispensing or receiving liquid through the outlet, to monitor the output signal of the pressure sensor and, depending on the monitored output signal of the pressure sensor, terminate or repeat the operation of the dosing means.
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Citations
23 Claims
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1. A device for dispensing or receiving a liquid volume, comprising:
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a liquid container comprising an outlet; a pressure generator which is implemented to provide a compressible gas volume with a constant amount of substance enclosed in the liquid reservoir with a pressure, wherein the gas volume is in direct or indirect fluidic contact with the liquid in the liquid reservoir; a doser coupled to the outlet of the liquid reservoir and configured to be operated in order to enable the liquid to pass the outlet; a pressure sensor for measuring a pressure existing in the gas volume and for outputting an output signal indicating the current pressure in the gas volume; and a controller coupled to the pressure generator, the doser and the pressure sensor and which is implemented to; control the pressure generator in order to change the pressure in the gas volume until the output signal of the pressure sensor indicates a first pressure, while the doser is not operated so that it prevents liquid from passing the outlet, operate the doser depending on the output signal of the pressure sensor in order to dispense or receive liquid through the outlet, and while dispensing or receiving liquid through the outlet, monitor the output signal of the pressure sensor and, depending on the monitored output signal of the pressure sensor, at least temporarily terminate the operation of the doser. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 23)
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17. A method for dispensing or receiving a liquid volume, comprising:
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providing a liquid in a liquid reservoir comprising an outlet; providing a compressible enclosed gas volume with a constant amount of substance which is in direct or indirect fluidic contact with the liquid in the liquid reservoir; changing the pressure in the gas volume until a pressure sensor indicates that a first pressure exists in the gas volume; operating a doser coupled to the outlet of the liquid reservoir in order to thus dispense liquid through the outlet from the liquid reservoir or receive the same in the liquid reservoir; while dispensing or receiving liquid through the outlet, monitoring the output signal of the pressure sensor; and depending on the monitored output signal of the pressure sensor, at least temporarily terminating the operation of the doser. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification