Method and device for operating a uv-radiation source

• US 6,906,337 B2
• Filed: 03/07/2001
• Issued: 06/14/2005
• Est. Priority Date: 03/30/2000
• Status: Expired due to Term

• Current Assignee: Xylem Ip Holdings LLC (Xylem, Inc.)
• Original Assignee: WEDECO AG Water Technology
• Inventors: Wedekamp, Horst
• Primary Examiner(s): Lee, John R.
• Assistant Examiner(s): Smith, II, Johnnie L
• Application Number:
  US10/240,617
• Publication Number:
  US 20040113102A1
• Time in Patent Office: 1,560 Days
• Field of Search: 250/504.R, 250/373, 250/435, 250/436, 210/748, 210/188, 210/199
• US Class Current: 250/504.00R
• CPC Class Codes: A61L 2/10 Ultraviolet radiation
• CPC Class Codes: C02F 1/325 Irradiation devices or lamp constructions
• CPC Class Codes: C02F 2201/326 Lamp control systems
• CPC Class Codes: H01J 61/02 Details
• CPC Class Codes: H05B 41/36 Controlling

Abstract

The invention relates to a method for operating a UV radiation source of the low-pressure gas discharge type. Said method comprises the following steps:—impingement of at least one heating coil with a heating voltage until the temperature of said coil has been increased;—impingement of the heating coil with a starting voltage in order to induce a gas discharge;—maintenance of the gas discharge by the application of a maintaining voltage and the disconnection of the heating voltage after the gas discharge has been started; in addition the following steps are preferably executed at any point in the method;—interrogation of an identification means that is connected to the UV radiation source and—if the response to the interrogation is negative, prevention or interruption of the operation,—if the response to the interrogation is positive, authorization of the operation. The invention also relates to a UV radiation source comprising a base body (20) and at least one connection zone which bears a number of electric connections (24, 25; 26, 27), whereby an identification means (28) that can be interrogated electrically is connected to the base body (20); and to a UV disinfection facility for fluids, in particular for water or waste water, said facility comprising at least one UV radiation source and an electric control and supply circuit that is located at a distance from the radiation source, whereby the control and supply circuit comprises an interrogation means which is suitable for verifying the presence of an identification means which is optionally assigned to the UV radiation source(s).

Claims

1. A method for operating a UV radiation source of the low-pressure gas discharge type, the UV radiation source having a heating coil which, in response to the impingement of selected voltages thereagainst, effects the discharging of gas, the method comprising:

interrogating an identification means, the identification means being associated with the UV radiation source such that a response by the identification means to an interrogation thereof is interpretable as an identifying characteristic of the UV radiation source;

in the event that a response to the interrogation of the identification means positively correlates with information indicating that operation of the respective associated UV radiation source is authorized, permitting the operation of the UV radiation source to proceed as an authorized operation; and

in the event that a response to the interrogation of the identification means does not positively correlate with information indicating that operation of the respective associated UV radiation source is authorized, intervening in connection with the operation of the respective associated UV radiation source such that at least one of a signal indicating the non-authorized status of the respective associated UV radiation source and a disablement of the operation of the respective associated UV radiation source are affected.

2. A method according to claim 1, wherein the operation of the UV radiation source includes impinging the heating coil with a starting voltage to induce a gas discharge and interrogating the identification means is performed before impinging the heating coil with a starting voltage.

3. A method according to claim 1, wherein interrogating the identification means includes interrogating an identification means containing information about at least one of the manufacturer and the type of radiation source.

4. A method according to claim 1, wherein interrogating the identification means includes interrogating an identification means containing information uniquely individually associated with the radiation source in the form of a serial number.

5. A method according to claim 1, wherein interrogating the identification means includes interrogating an identification means having a read/write memory which contains information about the accumulated operating life of the radiation source.

16. A method according to claim 1, wherein the operation of the UV radiation source includes impinging at least one heating coil with a heating voltage to effect the heating thereof up to an increased heating coil temperature, impinging the heating coil with a starting voltage to induce a gas discharge, and maintaining the discharging of gas by applying a maintenance voltage and de-activating the heating voltage after the step of impinging the heating coil with a starting voltage and interrogating an identification means is performed during a selected time before, during, or after impinging the heating coil with a heating voltage, impinging the heating coil with a starting voltage, or maintaining the discharging of the gas by applying a maintenance voltage to the heating coil.

6. A UV radiation source, comprising:

a base body;

at least one connection area which supports a plurality of electrical connections; and

an identification means which can be electrically interrogated connected to the base body.

7. A UV radiation source according to claim 6, wherein the identification means is connected to the base body in a manner such that the identification means is destroyed if it is removed from the base body.

8. A UV radiation source according to claim 6, wherein the identification means is an electronic circuit which is connected by the electrical connections.

9. A UV radiation source according to claim 6, wherein the identification means has two electrical connections and is electrically connected in parallel to a heating coil.

10. A UV radiation source according to claim 6, wherein the identification means has three electrical connections and is electrically connected in parallel to a heating coil and a third connection is provided for data transmission.

11. A UV radiation source according to claim 6, wherein the identification means is a transponder.

12. A UV disinfection facility for fluid disinfecting handling of, in particular, water or effluent, comprising:

at least one UV radiation source;

at least one identification means associated with the at least one UV radiation source; and

an electrical control and supply circuit spaced from the light source, the electrical control and supply circuit including an interrogation means which is configured for verifying the presence of the at least one identification means associated with the at least one UV radiation source.

13. A UV disinfecting facility according to claim 12, and further comprising an electronic start device associated with the identification means.

14. A UV disinfecting facility according to claim 12, wherein the interrogation means is connected with the identification means via a two-wire lead.

15. A UV disinfecting facility according to claim 12, wherein the interrogation means and the identification means exchange unidirectional or bi-directional data in the form of signals, which are modulated to correlate with the voltage of a heating coil.