AUTONOMOUS FILTER ELEMENT

• US 20100237013A1
• Filed: 02/04/2010
• Published: 09/23/2010
• Est. Priority Date: 02/13/2009
• Status: Abandoned Application

• Current Assignee: EMD Millipore Corporation (Merck & Co., Inc.)
• Original Assignee: Millipore Corporation
• Inventors: O'Brien, Timothy, DiLeo, Anthony, Burke, Aaron
• Application Number:
  US12/699,996
• Publication Number:
  US 20100237013A1
• Time in Patent Office: Days
• US Class Current: 210/637
• CPC Class Codes: B01D 2311/103 Heating
• CPC Class Codes: B01D 2311/1031 Heat integration, heat recovery or reuse within an apparatus
• CPC Class Codes: B01D 2311/16 Flow or flux control
• CPC Class Codes: B01D 2313/22 Cooling or heating elements
• CPC Class Codes: B01D 2321/40 Automatic control of cleaning processes
• CPC Class Codes: B01D 53/22 by diffusion manufacturing semi-permeable membranes B01D67/00; form, structure or properties of semi-permeable membranes B01D69/00; material for semi-permeable membranes B01D71/00
• CPC Class Codes: B01D 61/22 Controlling or regulating
• CPC Class Codes: B01D 63/08 Flat membrane modules
• CPC Class Codes: B01D 65/02 Membrane cleaning or sterilisation ; Membrane regeneration
• CPC Class Codes: B01D 65/08 Prevention of membrane fouling or of concentration polarisation
• CPC Class Codes: G01F 1/6888 Thermoelectric elements, e.g. thermocouples, thermopiles
• CPC Class Codes: G01F 1/69 of resistive type
• CPC Class Codes: G01F 15/125 Filters

Abstract

An autonomous filter device and a method for improving the filter life and performance is disclosed. The filter element is equipped with one or more sensors, adapted to measure one or more characteristics or parameters of the fluid, such as temperature, pressure, or flow rate. In response to the measured characteristic or parameter, the control logic within the filter element is able to determine an appropriate response. For example, the control logic may determine that a sudden, but temporary, blockage has occurred in the filter membrane. In response to this, the control logic may initiate a specific response designed to alleviate the blockage. This response may be a temperature change, a vibration, a change in fluid flow path, or some other action. The control logic will then determine the success of the response, based monitoring any change in the fluid characteristics. Based thereon, the control logic may alert the operator that the filter element must be replaced. Alternatively, if the response was successful in correcting the blockage, the control logic need not notify the operator, as the filter element is back to normal operating operation.

Claims

1. An autonomous filtering device, comprising:

a. A filter element having a membrane through which said fluids can pass and a housing to support said membrane; and

b. At least one sensor located within said filter element adapted to monitor at least one parameter associated with said filtering device;

c. A mechanism to indicate an alert to an operator; and

d. A processing unit in communication with said sensor and said mechanism, and adapted to control an actuator, wherein said processing unit is adapted to operate in each of three modes, wherein a first mode is used during normal operation, a second mode is used to control said actuator, and a third mode is used to activate said alert mechanism.

2. The element of claim 1, wherein said actuator is selected from the group consisting of a piezo electric device, an electromotive force device, a heating element, a valve, and a pump.

3. The element of claim 1, wherein said processing unit transitions between said mode based on the output of said sensor.

4. The element of claim 3, wherein said processing unit transitions from said first mode to said second mode if said sensor output is outside an acceptable range.

5. The element of claim 4, wherein said processing element controls said actuator, said actuator adapted to affect said parameter monitored by said sensor.

6. The element of claim 5, wherein said processing unit transitions from said second mode to said first mode, if said sensor output reverts to an acceptable range.

7. The element of claim 5, wherein said processing unit transitions from said second mode to said third mode is said sensor output does not return to an acceptable range.

8. A device for venting fluids, comprising:

a. A filter element having a membrane through which said fluids can pass and a housing to support said membrane; and

b. A heating element located within said filter element adapted to heat said membrane.

9. The device of claim 8, wherein said device is adapted to vent fluids from a container.

10. The device of claim 9, wherein said fluids comprise gases.

11. The device of claim 8, further comprising an induction loop adapted to convert electromagnetic field energy into electrical power.

12. The device of claim 8, further comprising a first temperature sensor, adapted to measure the temperature of said filter element.

13. The device of claim 12, further comprising a processing unit, adapted to regulate the temperature of said filter element.

14. The device of claim 13, wherein said processing unit regulates the temperature of said filter element, based on data from said first temperature sensor.

15. The device of claim 14, wherein said regulation comprises varying the current passing through said heating element.

16. The device of claim 13, further comprising a pressure sensor, wherein said processing unit regulates the temperature of said filter element based on data from said first temperature sensor and said pressure sensor.

17. The device of claim 16, wherein said processing unit compares said data to a predetermined set of values to regulate the temperature of said filtering element.

18. The device of claim 17, further comprising a storage element, wherein said predetermined set of values are stored in said storage element and said predetermined set of values comprises a phase diagram.

19. The device of claim 13, further comprising a second temperature sensor.

20. The device of claim 19, wherein said heating element and said filter element is positioned between said first temperature sensor and said second temperature sensor, so as to comprise a flow rate sensor.

21. The device of claim 20, wherein said processing unit determines flow rate based on data from said first and second temperature sensors.

22. The device of claim 20, wherein said device comprises a plurality of flow rate sensors, adapted to measure fluid flow at various points within said filter element.

23. The device of claim 13, further comprising an anemometer to measure the flow rate of said fluid.

24. The device of claim 23, wherein said device comprises a plurality of anemometers, adapted to measure fluid flow at various points within said filter element

25. The device of claim 13, further comprising an alert mechanism in communication with said processing unit, wherein said processing unit is adapted to inform an operator of an error condition.

26. The device of claim 13, wherein said first temperature sensor communicates with said processing unit wirelessly.

27. A method of preventing clogging of a filter element, comprising the steps of:

a. supplying a filter element having a membrane through which said fluids can pass and a housing to support said membrane, and a heating element located within said filter element adapted to heat said membrane;

b. regulating the temperature of said heating element within said filter element to minimize condensation on said membrane.

28. The method of claim 27, further comprising supplying a temperature sensor proximate to said filter element, and a processing unit in communication with said sensor and said heating element, adapted to receive data from said sensor.

29. The method of claim 28, wherein said heating element comprises a resistance element through which current is passed, and said processing unit regulates the temperature of said filter by varying the current through said heating element.

30. The method of claim 28, further comprising supplying a pressure sensor proximate to said filter element and in communication with said processing unit.

31. The method of claim 30, wherein said processing unit compares readings from said pressure and temperature sensors to a predetermined set of values, and based on said comparison, regulates the current through said heating element.

32. The method of claim 31, wherein said predetermined set of values comprises a phase diagram.

33. A method of providing status of a filter element, comprising the steps of:

a. supplying a filter element having a membrane through which said fluids can pass and a housing to support said membrane, a heating element located within said filter element adapted to heat said membrane and first and second temperature sensors located on either side of said membrane and said heating element, and a processing unit in communication with said sensors and said heating element;

b. monitoring the flow rate through said membrane based on the temperature difference between said first and second temperature sensor; and

c. alerting an operator if said flow rate decreases below a predetermined level, said decrease indicating that said membrane is clogged.

34. The method of claim 33, further comprising alerting an operator if said flow rate increase above a predetermined level, said increase indicative of a filter integrity problem.