CN116981884A - Partially premixed gas burner apparatus - Google Patents
Partially premixed gas burner apparatus Download PDFInfo
- Publication number
- CN116981884A CN116981884A CN202180095188.0A CN202180095188A CN116981884A CN 116981884 A CN116981884 A CN 116981884A CN 202180095188 A CN202180095188 A CN 202180095188A CN 116981884 A CN116981884 A CN 116981884A
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- Prior art keywords
- gas
- chamber
- air
- outlet pressure
- valve
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 64
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
- F23N2225/06—Measuring pressure for determining flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/18—Groups of two or more valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/20—Membrane valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/24—Valve details
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
A partially premixed gas burner appliance (10) comprises a combustion chamber (11), a fan (17) and a gas regulator (20). The fan (17) is configured to provide an air flow to the combustion chamber (11) and is assigned to an air inlet (11A) of the combustion chamber or to an air duct (18) configured to provide air to the air inlet. An air flow restriction element (19) is assigned to the air inlet (11A) or the air duct (18). The air flow restriction element (19) is configured to provide a pressure drop such that the pressure downstream of the air flow restriction element (19) is lower than the pressure upstream thereof. The gas regulator (20) is configured to provide a flow of gas to the combustion chamber (11), wherein a first portion of the air provided by the fan (17) is premixed with the flow of gas prior to combustion of the gas, and wherein a second portion of the air provided by the fan (17) is mixed with the gas as the gas is combusted. The gas regulator (20) is a pneumatic gas control valve having a main gas valve (22), a safety gas valve (23), a servo gas valve (24) and a gas outlet pressure regulator (25). A gas outlet pressure regulator (25), i.e. a first chamber (33) thereof, in which there is a pressure affecting the nominal value of the gas outlet pressure of the pneumatic gas control valve, is connected to the air inlet (11A) or to the air conduit (18) upstream of the air flow restriction element (19) such that the gas outlet pressure provided by the pneumatic gas control valve depends on the air pressure upstream of the air flow restriction element (19).
Description
Technical Field
The present invention relates to a partially premixed gas burner appliance.
Background
In the technical field of gas burner appliances, there are in principle two different types of gas burner appliances, namely fully premixed gas burner appliances and partially premixed gas burner appliances. In both types of gas burner apparatuses, a mixture of gas and air is combusted in the combustion chamber of the respective gas burner apparatus. The present invention relates to a partially premixed gas burner appliance.
EP 0 390 964 B2 and US 2009/0197 212 A1 disclose fully premixed gas burner appliances. In a fully premixed gas burner appliance, the air flow provided by the fan is fully premixed with the gas flow provided by the gas regulator before the resulting gas/air mixture is combusted.
EP 0,103,303 A2 discloses a partially premixed gas burner appliance comprising a combustion chamber in which gas is combusted. The fan provides an air flow to the combustion chamber. The fan is distributed to the exhaust gas outlet of the combustion chamber. When the fan assigned to the exhaust gas outlet is operated, air is sucked into the combustion chamber, wherein the air enters the combustion chamber through the air inlet. An air flow restriction element is assigned to the air inlet of the combustion chamber. The gas regulator provides a flow of gas to the combustion chamber, i.e. to a gas burner stem positioned within the combustion chamber. In a partially premixed gas burner appliance, only a first portion of the air flow provided by the fan is premixed with the gas flow before combustion takes place. In a partially premixed gas burner appliance, when combustion of the gas occurs, a second portion of the air flow provided by the fan is mixed with the gas.
Other prior art is disclosed in DE 196 992 B4, DE 198 21 853 C1 and EP 2 123 979 B1.
Disclosure of Invention
Against this background, a novel partially premixed gas burner appliance according to claim 1 is provided.
The novel partially premixed gas burner appliance comprises a combustion chamber.
The novel partially premixed gas burner further comprises a fan configured to provide air or air flow to the combustion chamber. The fan is assigned to an air inlet of the combustion chamber or an air duct providing air to the air inlet.
The novel partially premixed gas burner appliance further comprises an air inlet assigned to the combustion chamber or an air flow restriction element assigned to the air duct. The air flow restriction element is configured to cause a pressure drop such that an air pressure downstream of the air flow restriction element is lower than an air pressure of an air flow provided by a fan upstream of the air flow restriction element.
The novel partially premixed gas burner appliance further comprises a gas regulator configured to provide a gas flow to the combustion chamber.
A first portion of the air or air flow provided by the fan is premixed with the gas or gas flow prior to combustion of the gas. When the gas is combusted, a second portion of the air or gas flow provided by the fan is mixed with the gas.
The gas regulator of the novel partially premixed gas burner appliance is a pneumatic gas control valve. The pneumatic gas control valve has a main gas valve, a safety gas valve, a servo gas valve and a gas outlet pressure regulator. Such pneumatic gas control valves are configured for use in fully premixed gas burner appliances.
The gas outlet pressure regulator of the pneumatic gas control valve, i.e. the first chamber of the gas outlet pressure regulator, in which there is a pressure affecting the nominal value of the gas outlet pressure, is connected to the air inlet of the combustion chamber or to the air conduit upstream of the air flow restriction element, such that the gas outlet pressure provided by the pneumatic gas control valve depends on the air pressure provided by the fan upstream of the air flow restriction element.
The present invention proposes to utilize a pneumatic gas control valve configured for use in a fully premixed gas burner appliance within a partially premixed gas burner appliance. The fan is assigned to an air inlet of the combustion chamber or an air duct providing air to the air inlet. The gas outlet pressure regulator of the pneumatic gas control valve, i.e. the first chamber of the pneumatic gas control valve, in which there is a pressure affecting the nominal value of the gas outlet pressure, is connected to the air inlet of the combustion chamber or to the air conduit, i.e. upstream of the air flow restriction element. This makes it possible to provide, without the need for an electronic gas regulator, an air pressure upstream of the air flow restriction element and a gas outlet pressure of the pneumatic gas control valve of 1:1 ratio. The invention allows a very simple and reliable 1:1 gas-air control.
According to a preferred embodiment, a gas burner bar having at least two segments is positioned within the combustion chamber, wherein the combustion chamber comprises a separate gas inlet for each segment of the gas burner bar. A pneumatic gas control valve provides a flow of gas to each individual gas inlet of the combustion chamber. A shut-off valve may be assigned to at least one of the individual gas inlets to selectively open or close the respective gas inlet to selectively operate the respective section of the gas burner bar. Such a multi-segment construction of the burner bar enables a high turndown ratio to be achieved while reducing the power input to the burner. Very efficient operation of the partially pre-mixed gas burner appliance can be provided.
Alternatively, the gas burner bar may not be segmented. The unsegmented gas burner bar does not require a shut-off valve assigned to the gas inlet.
According to a preferred embodiment, the first chamber of the gas outlet pressure regulator of the pneumatic gas control valve is connected to the air inlet of the combustion chamber by a pipe or conduit. This provides a very simple and reliable way to balance the air pressure drop with the gas pressure drop.
According to a preferred embodiment, the gas outlet pressure regulator of the pneumatic gas control valve comprises a diaphragm. The first chamber of the gas outlet pressure regulator of the pneumatic gas control valve is positioned on the first side of the diaphragm such that the air pressure present in the first chamber acts on the first side of the diaphragm. A second chamber of the gas outlet pressure regulator of the pneumatic gas control valve is positioned on the second side of the diaphragm, wherein the second chamber of the gas outlet pressure regulator is connected to the gas outlet chamber of the pneumatic gas control valve such that the gas outlet pressure present in the second chamber acts on the second side of the diaphragm. The gas outlet pressure regulator further comprises a first spring and a second spring, wherein the spring force provided by the first spring acts on the first side of the diaphragm and the spring force provided by the second spring acts on the second side of the diaphragm. The gas outlet pressure regulator of the pneumatic gas control valve further comprises a preset unit acting on the first spring to modify the spring force acting on the first side of the diaphragm, thereby modifying the nominal value of the gas outlet pressure. A very simple and reliable 1 can be provided for a partially premixed gas burner appliance: 1 gas-air control without the need for electronic gas regulators.
Drawings
Preferred developments of the invention are provided by the description of the dependent claims and the accompanying drawings. Exemplary embodiments are explained in more detail based on the drawings, in which:
FIG. 1 shows a preferred embodiment of a partially premixed gas burner appliance according to the invention;
FIG. 2 shows a cross section of a pneumatic gas control valve of the partially pre-mixed gas burner apparatus of FIG. 1.
Detailed Description
The present invention relates to a partially premixed gas burner appliance 10.
The partially premixed gas burner 10 comprises a combustion chamber 11, in which combustion chamber 11 the gas G is combusted. In the embodiment shown, a gas burner bar 12 having at least two segments 12a,12b is positioned within the combustion chamber 11. The gas G is provided to the gas burner stem 12 for combustion. The combustion of the gas G takes place in the presence of air a. The combustion of the gas G produces a flame 13 and an exhaust gas E. Alternatively, the gas burner stem 12 may not be divided into a plurality of segments.
In the embodiment shown, the heat exchanger 14 is positioned within the combustion chamber 11. The heat exchanger 14 is used to heat, for example, sanitary water or central heating water W for a user.
The water W to be heated in the heat exchanger 14 is supplied to the heat exchanger 14 through a supply pipe 15. The water W that has been heated in the heat exchanger 14 flows to the corresponding water consumer through the return pipe 16.
The partially premixed gas burner 10 comprises a fan 17.
The fan 17 supplies an air flow a to the combustion chamber 11. The fan 17 is assigned to the air inlet 11A of the combustion chamber 11 or an air duct 18 that supplies air a to the air inlet 11A.
The novel partially premixed gas burner appliance 10 further comprises an air inlet 11A assigned to the combustion chamber 11 or an air flow restriction element 19 assigned to the air duct.
The air flow restriction element 19 causes a pressure drop such that the pressure downstream of the air flow restriction element 19 in the combustion chamber 11 is lower than the pressure of the air flow provided by the fan 17 upstream of the air flow restriction element 19. The air flow restriction element 19 may be provided by an orifice plate or a venturi nozzle.
The novel partially premixed gas burner appliance 10 further comprises a gas regulator 20, which gas regulator 20 provides a gas flow G to the combustion chamber 11, i.e. through at least one gas inlet 11G of the combustion chamber 11. The combustion chamber 11 may have a separate gas inlet 11G for each segment 12a,12b of the gas burner bar 12. The combustion chamber 11 may have a plurality of gas inlets 11G for the gas burner bar 12 that is not segmented or for each segment 12a,12b of the gas burner bar 12.
A gas flow rate limiting element 40 is assigned to each gas inlet 11G. Such a gas flow restriction element 40 causes a pressure drop such that the gas pressure upstream of the gas flow restriction element 40 is greater than the pressure downstream of the gas flow restriction element 40 in the combustion chamber 11. The gas flow restriction element 40 may be provided by an orifice plate or a venturi nozzle.
In the embodiment of fig. 1, a shut-off valve 41 is assigned to the gas inlet 11G to supply gas G to the section 12b of the gas burner bar 12. This makes it possible to selectively open or close the gas inlet 11G, thereby selectively operating the segment 12b of the gas burner stem 12.
Such a shut-off valve 41 can also be assigned to the gas inlet 11G to supply gas G to the section 12a of the gas burner bar 12.
The exhaust gas E flows out of the combustion chamber 11 through an exhaust gas outlet 11E of the combustion chamber 11.
A first portion A1 of the air flow or air a provided by the fan 17 enters the combustion chamber 11 through the air inlet 11A, premixed with the gas G provided by the gas regulator 20 before the gas G burns.
A second portion A2 of the air a provided by the fan 17 enters the combustion chamber 11 through the air inlet 11A and mixes with the gas G as it burns.
The gas regulator 20 is provided by a pneumatic gas control valve. The pneumatic gas control valve 20 is configured for use in a fully premixed gas burner appliance.
The pneumatic gas control valve 20 includes a housing 21, the housing 21 providing an inlet gas chamber 21a, an outlet gas chamber 21b, and an intermediate gas chamber 21c coupled between the inlet gas chamber 21a and the outlet gas chamber 21 b.
The pneumatic gas control valve 20 further comprises a main gas valve 22, a safety gas valve 23, a servo gas valve 24 and a gas outlet pressure regulator 25.
When the safety gas valve 23 is closed, the inlet gas chamber 21a and the intermediate gas chamber 21c are fluidly separated from each other. When the safety gas valve 23 is opened, the inlet gas chamber 21a and the intermediate gas chamber 21c are fluidly connected to each other.
The safety gas valve 12 is opened by the actuator 26 against the closing force provided by the spring 36. When the safety gas valve 23 is opened, the servo gas valve 24 is also opened. Both the safety gas valve 23 and the servo gas valve 24 are opened by an actuator 26.
When the main gas valve 22 is closed, the intermediate gas chamber 21c and the outlet gas chamber 21b are fluidly separated from each other.
When the main gas valve 22 is opened, the intermediate gas chamber 21c and the outlet gas chamber 21c are fluidly connected to each other.
The main gas valve 22 includes a diaphragm 27 and a spring 28. The diaphragm 27 separates the outlet gas chamber 21b from the servo pressure chamber 29. The servo pressure chamber 29 is fluidly connected to the servo gas valve 24.
The gas outlet pressure present in the outlet gas chamber 21b and the spring force provided by the spring 28 of the main gas valve 22 act on the first side of the diaphragm 27 of the main gas valve 22 tending to close the main gas valve 22.
The servo gas pressure present in the servo gas chamber 29 acts on the second side of the diaphragm 27 of the main gas valve 22 tending to open the main gas valve 22.
The servo gas chamber 29 is also fluidly connected to the gas outlet pressure regulator 25 of the pneumatic gas control valve 20 by a pressure relief valve 38.
The gas outlet pressure regulator 25 of the pneumatic gas control valve 20 comprises a diaphragm 30 and two springs 31, 32. The diaphragm 30 of the gas outlet pressure regulator 25 separates a first chamber 33 of the gas outlet pressure regulator 25 from a second chamber 34 thereof.
The pressure present in the first chamber 33 of the gas outlet pressure regulator 25 affects the nominal value of the gas outlet pressure in the outlet gas chamber 21b of the pneumatic gas control valve 20. The pressure present in the first chamber 33 of the gas outlet pressure regulator 25 acts on the first side of the diaphragm 30 of the gas outlet pressure regulator 25. Further, the spring force provided by the spring 31 acts on the first side of the diaphragm 30.
The second chamber 34 of the gas outlet pressure regulator 25 is positioned on the second side of said diaphragm 30, wherein the second chamber 34 of the gas outlet pressure regulator 25 is fluidly connected to the gas outlet chamber 11b of the pneumatic gas control valve 20 such that the gas outlet pressure present in the gas outlet chamber 21b and in the second chamber 34 of the gas outlet pressure regulator 25 acts on the second side of the diaphragm 30 of the gas outlet pressure regulator 25. Further, the spring force provided by the spring 32 acts on the second side of the diaphragm 30.
The gas outlet pressure regulator 25 of the pneumatic gas control valve 20 further comprises a preset unit 35 acting on the first spring 31 to modify the spring force acting on the first side of said diaphragm 30. The nominal value of the gas outlet pressure of the pneumatic gas control valve 20 can be modified by the preset unit 35. The preset unit 35 may be used to provide an offset or delta between the pressures on either side of the diaphragm 30 of the gas outlet pressure regulator 25 and thus an offset or delta between the generated air pressure and the gas outlet pressure.
A relief valve 38 is integrated into the diaphragm 30 of the gas outlet pressure regulator 25, the servo gas chamber 29 being fluidly connected to the gas outlet pressure regulator 25 of the pneumatic gas control valve 20 through the relief valve 38.
According to the invention, the gas outlet pressure regulator 25 of the pneumatic gas control valve 20, i.e. the first chamber 33 of the gas outlet pressure regulator 25, in which there is a pressure affecting the nominal value of the gas outlet pressure, is permanently fluidly connected to the air inlet 11A of the combustion chamber 11 or to an air duct providing air a to the air inlet 11A upstream of the air flow restriction element 18, such that the gas outlet pressure provided by the pneumatic gas control valve 20 depends on the air pressure provided by the fan 17 upstream of the air flow restriction element 18.
As shown, the first chamber 33 of the gas outlet pressure regulator 25 of the pneumatic gas control valve is connected to the air inlet 11A or air conduit 18 of the combustion chamber 11 by a tube or conduit 37.
The pneumatic gas control valve 20 features a positive servo system. The main gas valve 22 is closed by the spring 28 in the normally closed position and can only be opened when the pressure in the servo gas chamber 29 is sufficient to overcome the spring force of the spring 28. This ensures that the main gas valve 22 will close automatically in the event of a power or gas supply failure.
The element of the pneumatic gas control valve 20 is a gas outlet pressure regulator 25, which includes a pressure relief valve 38 integrated in the diaphragm 30 controlling the main gas valve 22.
When both the safety gas valve 22 and the servo gas valve 24 are opened by the actuator 26, then gas flows through the servo gas valve 24 into the servo pressure chamber 29 and to the relief valve 38. This gas pressure in the servo pressure chamber 29 moves the main valve diaphragm 27 upwards enough to open the main gas valve 22. Once the main gas valve 22 is open, the outlet gas pressure will be sensed by the regulator diaphragm 20 by connecting the second chamber 34 of the gas outlet pressure regulator 25 to the feedback passage 39 of the gas outlet chamber 21b of the pneumatic gas control valve 20.
When the force provided by the pressure in the second chamber 34 of the gas outlet pressure regulator 25 is greater than the force provided by the pressure in the first chamber 33 and the preset unit 35, the relief valve 38 opens, relieving some of the working pressure in the servo pressure chamber 29. This reduces the force against the main valve spring 28, allowing the main gas valve 22 to close proportionally. Thus, the main gas valve 22 limits the gas outlet pressure. As a result, the gas outlet pressure is continuously maintained by comparing the gas outlet pressure present in the second chamber 34 of the gas outlet pressure regulator 25 with the pressure present in the first chamber 33 of the gas outlet pressure regulator 25 and adjusting the position of the main gas valve 22 accordingly.
A fan 17 is located at the air inlet of the combustion chamber 11. The air pressure generated by the fan 17 is transferred to the first chamber 33 of the gas outlet pressure regulator 25 to generate an outlet gas pressure. This allows to provide a very simple and reliable 1 for a partially premixed gas burner appliance: 1 gas-air control.
The gas outlet pressure, and thus the gas flow provided by the pneumatic gas control valve 20, is a function of the air pressure generated by the fan 17. The offset or delta between the pressures on either side of the diaphragm 30 of the gas outlet pressure regulator 25 may be provided by a preset unit 35. At any speed of the fan 17, the pressure drop across the air flow restriction element 19 is equal to the pressure drop across the or each gas flow restriction element 40. Accordingly, the air flow rate and the gas flow rate are proportionally controlled. With the preset unit 35, the gas flow rate can be influenced to adjust to a desired gas and air ratio setting.
List of reference numerals
10. Partially premixed gas burner apparatus
11. Combustion chamber
11A air inlet
11G gas inlet
11E exhaust gas outlet
12. Gas burner rod
12a section
12b section
13. Flame
14. Heat exchanger
15. Supply pipe
16. Return pipe
17. Fan with fan body
18. Air duct
19. Air flow rate limiting element
20. Gas regulator/pneumatic gas control valve
21. Shell body
21a inlet gas chamber
21b outlet gas chamber
21c middle gas chamber
22. Main gas valve
23. Safety gas valve
24. Servo gas valve
25. Gas outlet pressure regulator
26. Actuator with a spring
27. Diaphragm
28. Spring
29. Servo pressure chamber
30. Diaphragm
31. Spring
32. Spring
33. Chamber
34. Chamber
35. Preset unit
36. Spring
37. Pipeline
38. Pressure relief valve
39. Feedback channel
40. Gas flow limiting element
41. And a stop valve.
Claims (10)
1. A partially premixed gas burner appliance (10), comprising:
a combustion chamber (11),
a fan (17) configured to provide an air flow to the combustion chamber (11),
wherein the fan (17) is assigned to an air inlet (11A) of the combustion chamber (11) or to an air duct (18) configured to supply air to the air inlet (11A),
an air flow restriction element (19) assigned to an air inlet (11A) or an air duct (18) of the combustion chamber (11) and configured to provide a pressure drop such that a pressure downstream of the air flow restriction element (19) is lower than a pressure upstream of the air flow restriction element (19),
a gas regulator (20) configured to provide a flow of gas to the combustion chamber (11),
wherein a first portion of the air provided by the fan (17) is premixed with the gas flow before the combustion of the gas,
wherein a second portion of the air provided by the fan (17) is mixed with the gas upon combustion of the gas,
wherein the gas regulator (20) is a pneumatic gas control valve having a main gas valve (22), a safety gas valve (23), a servo gas valve (24) and a gas outlet pressure regulator (25),
wherein the gas outlet pressure regulator (25), i.e. the first chamber (33) of the gas outlet pressure regulator (25), wherein there is a pressure affecting the nominal value of the gas outlet pressure of the pneumatic gas control valve, is connected to the air inlet (11A) or to the air duct (18) upstream of the air flow restriction element (19) such that the gas outlet pressure provided by the pneumatic gas control valve depends on the air pressure provided by the fan (17) upstream of the air flow restriction element (19).
2. The partially premixed gas burner apparatus according to claim 1, wherein:
the first chamber (33) of the gas outlet pressure regulator (25) of the pneumatic gas control valve is connected to the air inlet (11A) or air duct (18) of the combustion chamber (11) by a pipe or duct (37).
3. The partially premixed gas burner apparatus according to claim 1 or 2, wherein:
the gas outlet pressure regulator (25) of the pneumatic gas control valve comprises a diaphragm (30),
a first chamber (33) of the gas outlet pressure regulator (25) is positioned on a first side of the diaphragm (30) such that a pressure present within the first chamber (33) acts on the first side of the diaphragm (30),
a second chamber (34) of the gas outlet pressure regulator (25) is positioned on the second side of the diaphragm (30), wherein the second chamber (34) of the gas outlet pressure regulator (25) is connected to the gas outlet chamber (21 b) of the pneumatic gas control valve such that a gas outlet pressure present within the second chamber (34) acts on the second side of the diaphragm (30).
4. A partially premixed gas burner apparatus according to claim 3, wherein:
the gas outlet pressure regulator (25) comprises a first spring (31), wherein a spring force provided by the first spring (31) acts on a first side of the diaphragm (30),
the gas outlet pressure regulator (25) comprises a second spring (32), wherein a spring force provided by the second spring (32) acts on a second side of the diaphragm (30),
the gas outlet pressure regulator (25) comprises a preset unit (35) configured to act on the first spring (31) and to modify a respective spring force acting on a first side of said diaphragm (30).
5. The partially premixed gas burner apparatus according to claim 4, wherein:
the preset unit (35) is configured to modify a nominal value of the gas outlet pressure of the pneumatic gas control valve.
6. The partially premixed gas burner apparatus according to claim 3, 4 or 5, wherein:
the main gas valve (22) of the pneumatic gas control valve comprises a diaphragm (27) and a spring (28),
wherein the gas outlet pressure provided by the pneumatic gas control valve and the spring force provided by the spring (28) of the main gas valve (22) act on a first side of the diaphragm (27) of the main gas valve (22) tending to close the main gas valve (22),
wherein the servo gas chamber (29) is located on a second side of the diaphragm (28) of the main gas valve (22), wherein a servo gas pressure present in the servo gas chamber (28) acts on the second side of the diaphragm (27) of the main gas valve (22), tending to open the main gas valve (22),
wherein the servo gas chamber (29) is connected with a servo gas valve (24) of the pneumatic gas control valve and is connected with a gas outlet pressure regulator (25) of the pneumatic gas control valve.
7. The partially premixed gas burner apparatus according to claim 6, wherein:
the servo gas chamber (29) is connected to the gas outlet pressure regulator (25) by means of a pressure relief valve (38) integrated in the diaphragm (30) of the gas outlet pressure regulator (25).
8. The partially premixed gas burner apparatus according to one of claims 1 to 7, wherein:
a gas burner stem (12) having at least two segments (12 a,12 b) is positioned within the combustion chamber (11),
the combustion chamber (11) comprises at least one separate gas inlet (11G) for each section (12 a,12 b) of the gas burner rod (12),
a pneumatic gas control valve provides a flow of gas to each individual gas inlet (11G) of the combustion chamber (11).
9. The partially premixed gas burner apparatus according to claim 8, wherein:
a shut-off valve (41) is assigned to at least one of the individual gas inlets (11G) for selectively opening or closing the respective gas inlet (11G) for selectively operating the respective section (12 a,12 b) of the gas burner bar (12).
10. The partially premixed gas burner according to one of the claims 1 to 9, wherein:
the pneumatic gas control valve is configured for use in a fully premixed gas burner appliance.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2021/079048 WO2022183429A1 (en) | 2021-03-04 | 2021-03-04 | Partially-premixed gas burner appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116981884A true CN116981884A (en) | 2023-10-31 |
Family
ID=74884771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180095188.0A Pending CN116981884A (en) | 2021-03-04 | 2021-03-04 | Partially premixed gas burner apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240142103A1 (en) |
| EP (1) | EP4302015A1 (en) |
| CN (1) | CN116981884A (en) |
| WO (1) | WO2022183429A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024053871A (en) * | 2022-10-04 | 2024-04-16 | 株式会社ノーリツ | Combustion device and hot water device equipped with the same |
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| CH680749A5 (en) * | 1990-04-04 | 1992-10-30 | Landis & Gyr Betriebs Ag | |
| DE4317981A1 (en) * | 1993-05-28 | 1994-12-01 | Ranco Inc | Gas-air ratio control device for a temperature control loop for gas appliances |
| EP0644377B1 (en) * | 1993-09-16 | 1996-10-23 | Honeywell B.V. | Control device for gas burners |
| DE19639992B4 (en) | 1995-09-23 | 2007-09-13 | Vaillant Gmbh | Method for controlling the gas flow rate |
| DE19821853C1 (en) | 1998-05-15 | 1999-07-29 | Honeywell Bv | Regulator for gas burner |
| US20090197212A1 (en) | 2008-02-04 | 2009-08-06 | Maxitrol Company | Premix Burner Control System and Method |
| DE102008024843A1 (en) | 2008-05-23 | 2009-11-26 | Honeywell Technologies S.A.R.L. | Gas Regulator |
| DE102010044762A1 (en) * | 2010-09-08 | 2012-03-08 | Honeywell Technologies S.A.R.L. | Device for calibrating a gas burner control |
-
2021
- 2021-03-04 US US18/548,666 patent/US20240142103A1/en active Pending
- 2021-03-04 EP EP21707602.5A patent/EP4302015A1/en active Pending
- 2021-03-04 WO PCT/CN2021/079048 patent/WO2022183429A1/en active Application Filing
- 2021-03-04 CN CN202180095188.0A patent/CN116981884A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4302015A1 (en) | 2024-01-10 |
| US20240142103A1 (en) | 2024-05-02 |
| WO2022183429A1 (en) | 2022-09-09 |
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