Regulating device for gas burners

• US 8,668,491 B2
• Filed: 10/05/2010
• Issued: 03/11/2014
• Est. Priority Date: 10/06/2009
• Status: Active Grant

• Current Assignee: Pittway Sarl (Resideo Technologies, Inc.)
• Original Assignee: Honeywell Technologies SARL (Honeywell International Inc.)
• Inventors: Praat, Jos, Vrolijk, Enno
• Primary Examiner(s): Rinehart, Kenneth
• Assistant Examiner(s): Lau, Jason
• Application Number:
  US12/898,478
• Publication Number:
  US 20110081619A1
• Time in Patent Office: 1,253 Days
• Field of Search: 431/89, 431/354, 431/12, 340/605, 236/15.BD
• US Class Current: 431/89
• CPC Class Codes: F23N 1/002 using electronic means F23N1/04 - F23N1/10 take precedence
• CPC Class Codes: F23N 2005/181 using detectors sensitive to rate of flow of air
• CPC Class Codes: F23N 2225/06 for determining flow
• CPC Class Codes: F23N 5/184 using electronic means

Abstract

Regulating device for gas burners for providing a gas/air mixture, with a mixing device for mixing a gas flow with a combustion air flow to provide the gas/air mixture, wherein at least one gas valve is positioned in a gas line which conducts the gas flow, which is adjusted in dependence upon a measurement signal of an electric or electronic sensor, wherein the sensor determines the differential pressure between the gas line and a reference pressure. The mixing device may be formed as a Venturi nozzle, in which the gas flow and the combustion air flow are mixed, wherein the reference pressure for the sensor is a device in which the reference pressure prevails, and the device is connected via a connecting line to the Venturi nozzle downstream of the mixing region of the Venturi nozzle.

Claims

1. A regulating device for providing a desired gas/air mixture to a gas burner, wherein a gas line provides a source of gas to a gas valve, and the gas valve provides a regulated gas flow based at least in part on a signal provided by a sensor, wherein the signal provided by the sensor is related to a gas pressure of the regulated gas flow against a reference pressure at a reference pressure input of the sensor, the regulating device comprising:

a mixing device for mixing the regulated gas flow with a combustion air flow to produce a gas/air mixture to the gas burner, the mixing device includes a venturi nozzle, wherein the regulated gas flow is provided to a mixing region of the venturi nozzle in which the regulated gas flow and the combustion air flow are mixed to form the desired gas/air mixture;

a device having an inner chamber and an outer chamber separated by a filter, wherein the inner chamber is fluidly coupled to the reference pressure input of the sensor, and the outer chamber is fluidly coupled to a region of the mixing device that is downstream of the mixing region of the venturi nozzle via a connecting line; and

a flow guiding element associated with the outer chamber of the device, wherein the flow guiding element helps guide and/or capture an ambient air flow from an ambient atmosphere to the outer chamber, and further helps guide and/or capture a flow from the reference pressure input of the sensor, which has crossed over from the inner chamber and into the outer chamber through the filter.

2. The regulating device of claim 1, wherein the region of the mixing device that is downstream of the mixing region is also in the venture nozzle.

3. The regulating device of claim 1, wherein the sensor is flowmeter.

4. The regulating device of claim 1, wherein the sensor is anemometer.

5. A regulating device for providing a desired gas/air mixture to a gas burner, wherein a gas line provides a source of gas to a gas valve, and the gas valve provides a regulated gas flow based at least in part on a signal provided by a sensor, wherein the signal provided by the sensor is related to a gas pressure of the regulated gas flow against a reference pressure at a reference pressure input of the sensor, the regulating device comprising:

a mixing device for mixing the regulated gas flow with a combustion air flow to produce a gas/air mixture to the gas burner;

the mixing device includes a venturi nozzle, wherein the regulated gas flow is provide to a mixing region of the venturi nozzle in which the regulated gas flow and the combustion air flow are mixed to form the desired gas/air mixture; and

a device fluidly coupled to the reference pressure input of the sensor, wherein the device is connected via a connecting line to a region of the mixing device that is downstream of the mixing region of the venturi nozzle.

6. The regulating device of claim 5,

wherein the device has an inner chamber and an outer chamber, with the inner chamber in fluid communication with but separated from the outer chamber by a filter;

and

wherein the inner chamber is in fluid communication with the reference pressure input of the sensor.

7. The regulating device of claim 6, wherein the outer chamber is in fluid communication with an ambient atmosphere and is further in fluid communication with the connecting line that connects the device to the region of the mixing device that is downstream of the mixing region of the venturi nozzle.

8. The regulating device of claim 7, further comprising a flow guiding element associated with the outer chamber of the device, wherein the flow guiding element helps guide and/or capture an ambient air flow from the ambient atmosphere to the outer chamber, and further helps guide and/or capture a flow from the reference pressure input of the sensor, which has crossed over from the inner chamber and into the outer chamber through the filter.

9. The regulating device of claim 6, wherein the filter is a dust filter which limits crossing over of dust from the outer chamber into the inner chamber and into the reference pressure input of the sensor.

10. The regulating device of claim 5, wherein the sensor is flowmeter, and the signal provided by the sensor represents a flow rate between the regulated gas flow and the reference pressure input of the sensor.

11. A regulating device for providing a desired gas/air mixture to a gas burner, wherein a gas line provides a source of gas to a gas valve, and the gas valve provides a regulated gas flow based at least in part on a signal provided by a sensor, wherein the signal provided by the sensor is related to a differential gas pressure between the regulated gas flow and a reference pressure at a reference pressure input of the sensor, the regulating device comprising:

a mixing device for mixing the regulated gas flow with a combustion air flow to produce a gas/air mixture to the, gas burner, wherein the regulated gas flow is provide to a mixing region of the mixing device in which the regulated gas flow and the combustion air flow are mixed to form the desired gas/air mixture; and

a device having a chamber, wherein the chamber of the device is in fluid communication with;

the reference pressure input of the sensor;

an ambient atmosphere; and

a region of the mixing device that is downstream of the mixing region.

12. The regulating device of claim 11, wherein the region of the mixing device that is downstream of the mixing region is fluidly connected to the chamber of the device via a connecting line.

13. The regulating device of claim 12, wherein the chamber of the device includes an inner chamber and an outer chamber, wherein the inner chamber is separated from the outer chamber by a filter.

14. The regulating device of claim 13, wherein the reference pressure input of the sensor is in fluid communication with the inner chamber, and is in fluid communication with the outer chamber through the inner chamber and the filter.

15. The regulating device of claim 14, wherein the outer chamber is in fluid communication with the ambient atmosphere.

16. The regulating device of claim 15, wherein the outer chamber is in fluid communication with the region of the mixing device that is downstream via the connecting line.

17. The regulating device of claim 16, wherein the inner chamber is in fluid communication with the region of the mixing device that is downstream via the filter and then the connecting line.

18. The regulating device of claim 17, further comprising a flow guiding element associated with the outer chamber of the device, wherein the flow guiding element helps guide and/or capture an ambient air flow from the ambient atmosphere to the outer chamber, and further helps guide and/or capture a flow from the reference pressure input of the sensor, which has crossed over from the inner chamber and into the outer chamber through the filter.

19. The regulating device of claim 11, wherein mixing device includes a venturi nozzle, wherein the mixing region is in the venturi nozzle.

20. The regulating device of claim 19, wherein the region of the mixing device that is downstream of the mixing region is also in the venture nozzle.