Ultraviolet radiation lamp and source module and treatment system containing same

• US 8,318,007 B2
• Filed: 08/31/2006
• Issued: 11/27/2012
• Est. Priority Date: 08/31/2005
• Status: Active Grant

• Current Assignee: Trojan Technologies Incorporated (Danaher Corporation)
• Original Assignee: Trojan Technologies Incorporated (Danaher Corporation)
• Inventors: Elku, Joseph, Sasges, Michael, Fraser, Jim
• Primary Examiner(s): DRODGE, JOSEPH W
• Application Number:
  US12/065,501
• Publication Number:
  US 20090090667A1
• Time in Patent Office: 2,280 Days
• Field of Search: 962/24, 964/20, 210/85, 210/143, 210/149, 210/192, 210/748.1, 210/748.11, 210/748.12, 210/87, 210/97, 210/739, 210/746, 315/32, 315/56, 315/326, 250/428, 250/429, 250/432.R, 250/435, 250/436, 250/504.R, 361/93.8, 422/24, 422/121, 422/186.3, 313/10, 313/11, 313/37
• US Class Current: 210/85
• CPC Class Codes: C02F 1/325 Irradiation devices or lamp constructions
• CPC Class Codes: C02F 2201/326 Lamp control systems
• CPC Class Codes: C02F 2209/02 Temperature
• CPC Class Codes: G05D 23/22 the sensing element being a thermocouple
• CPC Class Codes: H01J 61/523 Heating or cooling particular parts of the lamp
• CPC Class Codes: H01J 61/56 One or more circuit elements structurally associated with the lamp

Abstract

The invention relates to an ultraviolet radiation lamp. The lamp comprises a substantially sealed cavity comprising a mercury-containing material; a filament disposed in the sealed cavity; and an electrical control element in contact with the filament, the electrical control element configured to adjust or maintain a temperature of the mercury-containing material with respect to a prescribed temperature. Such a constructions allows the present ultraviolet radiation lamp to be operated at optimal efficiency without the need to use additional components to add heat to and/or remove heat from the mercury-containing material.

Claims

1. An ultraviolet radiation lamp system for treating a fluid, comprising:

a substantially sealed cavity comprising a mercury-containing material;

a filament disposed in the sealed cavity; and

an electrical control element in contact with the filament, the electrical control element configured to maintain a temperature of the mercury-containing material with respect to a predetermined temperature, the electrical control element comprising an integrated circuit containing an algorithm which maintains the temperature of the mercury-containing material by modulating a current through the filament based on (i) at least one predetermined fluid parameter of the fluid to be treated, other than sensed lamp temperature, and (ii) predetermined target temperatures of the mercury-containing material with respect to values of the at least one predetermined fluid parameter.

2. The ultraviolet radiation lamp system defined in claim 1, further comprising an electrical connection unit disposed at one end of the cavity and comprising at least one electrical connector in electrical connection with the filament.

3. The ultraviolet radiation lamp system defined in claim 2, wherein the electrical connection unit comprises a first connection unit disposed at one end of the lamp and a second connection unit releasably engageable with respect to the first connection unit.

4. The ultraviolet radiation lamp system defined in claim 3, wherein the electrical control element is disposed in the first connection unit.

5. The ultraviolet radiation lamp system defined in claim 3, wherein the electrical control element is disposed in the second connection unit.

6. The ultraviolet radiation lamp system defined in claim 3, wherein the first connection unit and the second connection unit have a substantially complementary fit.

7. The ultraviolet radiation lamp system defined in claim 3, wherein the second connection unit comprises a receptacle portion for receiving the at least one electrical connector when the first connection unit and the second connection unit are engaged.

8. The ultraviolet radiation lamp system defined in claim 1, wherein the mercury-containing material is disposed in a first portion in the cavity.

9. The ultraviolet radiation lamp system defined in claim 8, wherein the first portion of the cavity is disposed substantially near the filament.

10. The ultraviolet radiation lamp system defined in claim 8, wherein the first portion of the cavity is disposed adjacent the filament.

11. The ultraviolet radiation lamp system defined in claim 1, wherein the predetermined target temperature is empirically determined with respect to (i) the at least one predetermined fluid parameter, and (ii) at least one other predetermined operational parameter.

12. The ultraviolet radiation lamp system defined in claim 11, wherein the predetermined target temperature is empirically determined with respect to two or more predetermined fluid parameters of the fluid to be treated.

13. The ultraviolet radiation lamp system defined in claim 11, wherein the at least one other predetermined operational parameter is a fixed parameter.

14. The ultraviolet radiation lamp system defined in claim 13, wherein the fixed parameter is selected from the group comprising sleeve diameter, maximum lamp power, lamp power range, lamp orientation, lamp diameter, lamp internal design, lamp base design, dimension of the filament, composition of the filament, configuration of the filament and lamp orientation in the sleeve.

15. The ultraviolet radiation lamp system defined in claim 11, wherein the at least one other predetermined operational parameter is a variable parameter.

16. The ultraviolet radiation lamp system defined in claim 15, wherein the variable parameter is selected from lamp power, and electrode changes that occur during the lamp life cycle of the lamp.

17. A radiation source assembly comprising the ultraviolet radiation lamp system defined in claim 1 and a radiation transparent protective sleeve therefore.

18. A radiation source module comprising a first support element and at least one radiation source assembly as defined in claim 17 connected at a first end thereof to the first support element.

19. The radiation source module defined in claim 18, comprising a plurality of radiation source assemblies connected at respective first ends thereof to the first support element.

20. The radiation source module defined in claim 18, further comprising a second support element to which is connected a second end of the at least one radiation source assembly.

21. A fluid treatment system comprising the radiation source assembly defined in claim 17.

22. A fluid treatment system comprising a plurality of radiation source assemblies as defined in claim 17.

23. A fluid treatment system comprising the radiation source module defined in claim 18.

24. A fluid treatment system comprising a plurality of radiation source modules as defined in claim 18.

25. The ultraviolet radiation lamp system defined in claim 1, wherein the integrated circuit includes a memory storing (i) a plurality of predetermined fluid parameters relating to the fluid being treated, and (ii) a plurality of filament current values corresponding to the plurality of predetermined fluid parameters, and wherein the integrated circuit selects one of said plurality of filament current values corresponding to one of the plurality of predetermined fluid parameters.

26. The ultraviolet radiation lamp system defined in claim 1, wherein the fluid parameter comprises water temperature.

27. The ultraviolet radiation lamp system defined in claim 26, wherein the water temperature is predetermined.

28. The ultraviolet radiation lamp system defined in claim 26, wherein the algorithm maintains the temperature of the mercury-containing material based on detected water temperature.

29. An ultraviolet radiation lamp comprising:

a substantially sealed cavity comprising a mercury-containing material having a predetermined optimum temperature range in which the mercury-containing material is vaporized;

a filament disposed in the sealed cavity;

an electrical control element in contact with the filament, the electrical control element configured to cause the temperature of the mercury-containing material to remain substantially within the predetermined optimum temperature range; and

a thermal sensor in contact with the electrical control element and the mercury-containing material, the thermal sensor configured to detect and respond to a change in temperature of the mercury-containing material.

30. The ultraviolet radiation lamp defined in claim 29, wherein the electrical control element is in electrical contact with the filament and the thermal sensor, the electrical control element configured to change the temperature of the filament in response to a signal received from the thermal sensor to cause the temperature of the mercury-containing material to remain substantially within the predetermined optimum temperature range.

31. The ultraviolet radiation lamp defined in claim 29, wherein the thermal sensor comprises a thermocouple.

32. The ultraviolet radiation lamp defined in claim 29, wherein the thermal sensor comprises a thermal switch or a RTD.

33. The ultraviolet radiation lamp defined in claim 29, wherein a portion of the thermal sensor is disposed in the cavity.

34. The ultraviolet radiation lamp defined in claim 29, wherein the thermal sensor is disposed in an annular element surrounding at least a portion of the cavity.

35. The ultraviolet radiation lamp defined in claim 29, further comprising an electrical connection unit disposed at one end of the cavity and comprising at least one electrical connector in electrical connection with the filament.

36. The ultraviolet radiation lamp defined in claim 35, wherein the electrical connection unit comprises a first connection unit disposed at one end of the lamp and a second connection unit releasably engageable with respect to the first connection unit.

37. The ultraviolet radiation lamp defined in claim 36, wherein the electrical control element is disposed in the first connection unit.

38. The ultraviolet radiation lamp defined in claim 36, wherein the electrical control element is disposed in the second connection unit.

39. The ultraviolet radiation lamp defined in claim 36, wherein the first connection unit and the second connection unit have a substantially complementary fit.

40. The ultraviolet radiation lamp defined in claim 36, wherein the second connection unit comprises a receptacle portion for receiving the at least one electrical connecter when the first connection unit and the second connection unit are engaged.

41. The ultraviolet radiation lamp defined in claim 29, wherein the mercury-containing material is disposed in a first portion in the cavity.

42. The ultraviolet radiation lamp defined in claim 41, wherein the first portion of the cavity is disposed substantially near the filament.

43. The ultraviolet radiation lamp defined in claim 41, wherein the first portion of the cavity is disposed adjacent the filament.

44. An ultraviolet radiation lamp comprising:

a substantially sealed elongate cavity comprising a first filament and a second filament disposed therein near opposite ends thereof;

a reservoir disposed in the cavity;

a mercury-containing material disposed in the reservoir, the mercury-containing material having a predetermined optimum temperature range in which the mercury-containing material is vaporized; and

an electrical control element in contact with the filament, the electrical control element configured to cause the temperature of the mercury-containing material to remain substantially within the predetermined optimum temperature range, the electrical control element (i) comprising structure for measuring filament temperature through indirect monitoring of at least one of filament resistance and filament voltage, and (ii) configured to regulate the temperature of the mercury-containing material based on correlation of the temperature of the mercury-containing material and the temperature of the filament.

45. An ultraviolet radiation lamp for treating a fluid, comprising:

a substantially sealed cavity comprising a mercury-containing material;

a filament disposed in the sealed cavity;

a detector configured to measure ultraviolet radiation from the sealed cavity during operation of the lamp; and

an electrical control element in contact with the detector and the filament, the electrical control element configured to maintain a temperature of the mercury-containing material with respect to a predetermined temperature by modulating a current through the filament based on (i) at least one predetermined fluid parameter of the fluid to be treated, other than sensed lamp temperature and sensed mercury-containing-material temperature, and (ii) predetermined target temperatures of the mercury-containing material with respect to values of the at least one predetermined fluid parameter, and (iii) the measured ultraviolet radiation from the detector.

46. The ultraviolet radiation lamp defined in claim 45, wherein at least a portion of the detector is disposed within the cavity.

47. The ultraviolet radiation lamp defined in claim 45, wherein the detector is disposed outside the cavity.

48. The ultraviolet radiation lamp defined in claim 45, further comprising an electrical connection unit disposed at one end of the cavity and comprising at least one electrical connector in electrical connection with the filament.

49. The ultraviolet radiation lamp defined in claim 48, wherein the electrical connection unit comprises a first connection unit disposed at one end of the lamp and a second connection unit releasably engageable with respect to the first connection unit.

50. The ultraviolet radiation lamp defined in claim 49, wherein the electrical control element is disposed in the first connection unit.

51. The ultraviolet radiation lamp defined in claim 49, wherein the electrical control element is disposed in the second connection unit.

52. The ultraviolet radiation lamp defined in claim 49, wherein the first connection unit and the second connection unit have a substantially complementary fit.

53. The ultraviolet radiation lamp defined in claim 49, wherein the second connection unit comprises a receptacle portion for receiving the at least one electrical connecter when the first connection unit and the second connection unit are engaged.

54. The ultraviolet radiation lamp defined in claim 45, wherein the mercury-containing material is disposed in a first portion in the cavity.

55. The ultraviolet radiation lamp defined in claim 54, wherein the first portion of the cavity is disposed substantially near the filament.

56. The ultraviolet radiation lamp defined in claim 54, wherein the first portion of the cavity is disposed adjacent the filament.

57. The ultraviolet radiation lamp defined in claim 45, wherein the predetermined target temperature is within an range prescribed for optimum operation of the lamp.