CN109958997B - Constant pressure burner - Google Patents
Constant pressure burner Download PDFInfo
- Publication number
- CN109958997B CN109958997B CN201711434016.3A CN201711434016A CN109958997B CN 109958997 B CN109958997 B CN 109958997B CN 201711434016 A CN201711434016 A CN 201711434016A CN 109958997 B CN109958997 B CN 109958997B
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- CN
- China
- Prior art keywords
- valve
- cavity
- port
- gas
- fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 35
- 238000007664 blowing Methods 0.000 claims abstract description 5
- 238000010992 reflux Methods 0.000 claims abstract description 4
- 230000005389 magnetism Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000002737 fuel gas Substances 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/34—Excess-flow valves in which the flow-energy of the flowing medium actuates the closing mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/007—Regulating fuel supply using mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The present invention relates to a constant pressure burner and, comprises a combustion unit and a fan which are arranged in a shell; the gas unit is connected with a gas pipeline; the air outlet of the fan is connected with the bottom of the shell and faces the combustion unit, and is used for blowing air from the bottom to the combustion unit; the combustion unit comprises a fire grate and a gas distribution system for supplying gas to the fire grate; the pressure stabilizing valve comprises a valve body, wherein the valve body is provided with a valve cavity, a backflow cavity, an air inlet, an air outlet and a backflow port; the valve rod, the valve plug, the first elastic component for providing valve plug reset are arranged in the valve cavity, the flexible valve is arranged on the second port of the valve cavity in a sealing manner, the driving device is used for driving the valve rod to move, and the magnet of the driving device is provided with an accommodating cavity and an air port; the air inlet is connected with the gas pipeline, the air outlet is connected with the inlet of the gas distribution system, the reflux port is connected with the air outlet of the gas distribution system, and the air port is communicated with the air outlet of the fan.
Description
Technical Field
The invention relates to a burner, in particular to a constant pressure burner for a water heater or a dual-purpose furnace.
Background
The existing gas water heater or gas dual-purpose furnace generally comprises a combustion unit, a forced exhaust fan, a combustion unit, a combustion heat exchange system, a waterway pipeline and other parts; the combustion heat exchange system is arranged above the combustion unit and is used for transferring heat of high-temperature flue gas generated by combustion of the combustion unit into water flow in the water pipe; the strong exhaust fan is arranged above the combustion heat exchange system and is used for strongly exhausting the combustion waste gas; the bath water enters the terminal after exchanging heat with hot water in the heat exchanger, and the fan always works at high temperature, so that carbon deposition is easy to generate to influence the combustion working condition.
However, if the fan is simply arranged below the combustion unit, when the dual-purpose furnace works, the air pressure can interfere with the constant gas pressure due to the fact that the fan is arranged at the upstream of the combustion unit, so that the accuracy of the outlet water temperature is affected.
Disclosure of Invention
The invention aims to solve the technical problem of providing a constant pressure burner which can accurately and constantly supply gas pressure and has good air supplementing effect to a combustion unit.
The technical scheme adopted for solving the technical problems is as follows: the constant pressure burner includes: a combustion unit and a fan arranged in the shell; the gas unit is connected with a gas pipeline;
the method is characterized in that:
the fan is arranged below the shell, and an air outlet of the fan is connected with the bottom of the shell and faces the combustion unit and is used for blowing air from the bottom to the combustion unit;
the combustion unit comprises a fire grate and a gas distribution system for supplying gas to the fire grate;
a pressure regulating valve for maintaining a constant pressure of gas entering the combustion unit, comprising:
the inside of the valve body is provided with a valve cavity communicated with an air inlet on the valve body, an air outlet cavity communicated with an air outlet on the valve body and a backflow cavity; the valve body is also provided with a backflow port communicated with the backflow cavity;
the valve rod is movably arranged in the valve cavity;
a valve plug facing the first port of the valve cavity and movably arranged in the backflow cavity, connected with the first end of the valve rod, and used for switching on and off the valve cavity and the air outlet cavity through the movement of the valve plug;
a first elastic component, which is arranged between the valve plug and the inner wall of the valve body and is used for providing the driving force for resetting the valve plug;
a flexible valve sealingly disposed at a second port of the valve cavity and drivingly connected to a second end of the valve stem;
the driving device is in driving connection with the second end of the valve rod and comprises a magnet, an accommodating cavity is formed in the magnet, an electromagnet is movably accommodated in the accommodating cavity, and the electromagnet is in driving connection with the second end of the valve rod;
the magnetism generated when the electromagnet is electrified is repulsive to the magnetism of the magnet; the magnet is provided with an air port communicated with the accommodating cavity;
the gas inlet is connected with the gas pipeline, the gas outlet is connected with the inlet of the gas distribution system, the backflow port is connected with the gas outlet of the gas distribution system, and the gas outlet is communicated with the gas outlet of the fan.
Preferably, a groove may be formed in the valve plug, the second elastic component is accommodated in the groove, and an inlet of the groove is communicated with the backflow cavity. The design of recess on the one hand provides the accommodation chamber of elastic component, has still reduced the weight of valve plug simultaneously, has further improved the sensitivity that the valve plug removed.
Preferably, the groove 31 has an inverted "U" shape, which facilitates pushing the valve plug. The first elastic component comprises a spring seat and a spring which are arranged on the inner wall of the valve body;
the spring is sleeved on the spring seat, and two ends of the spring respectively abut against the bottom surface of the spring seat and the bottom surface of the groove;
the first end of the valve rod is in driving connection with the bottom wall of the groove.
Preferably, the end surface area of the first port of the valve cavity is equal to the port area of the second port of the valve cavity.
Preferably, the fan is a direct current variable frequency fan.
Compared with the prior art, the design of the constant-pressure combustor and the pressure stabilizing valve provided by the invention has the advantages that the pressure feedback is arranged at the gas outlet, the real outlet pressure is used for closed-loop feedback, the control on the gas outlet pressure is more accurate, the pressure stabilizing performance is obviously improved, and the pressure stabilizing effect is better; the communication between the fan outlet and the pressure stabilizing valve port makes the combustor maintain the set valve port opening constantly and further maintain the gas pressure accurately.
Drawings
FIG. 1 is a schematic diagram of an internal structure of an embodiment of the present invention;
fig. 2 is a longitudinal sectional view of a pressure stabilizing valve in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 and 2, the constant pressure burner includes:
the case 7 is a protective cover for mounting each component.
A combustion unit 8 disposed in the housing 7 and including a fire row 81 and a gas distribution system 82 for supplying gas to the fire row 81; the gas distribution system in this embodiment is a multi-stage gas distribution system, and can supply gas to the nozzles of each stage as needed.
The fan 9 is arranged below the shell 7 and can blow air into the shell 7 from the bottom, and an air outlet of the fan 9 faces the combustion distribution system 82 and is used for supplementing secondary air to the combustion unit 8 and forcibly pushing exhaust gas generated by combustion of the combustion unit to the outside through the blowing of the fan 9. The fan in this embodiment is a direct current variable frequency fan.
The fan 9 is arranged below the shell 7, is connected with the bottom of the shell and is used for blowing air from the bottom to the combustion unit 8;
a pressure regulator valve a for maintaining a constant pressure of the fuel gas entering the fuel gas distribution system 82, comprising:
the valve body 1 is internally provided with a valve cavity 15 communicated with an air inlet 11 on the valve body 1, an air outlet cavity 14 communicated with an air outlet 13 on the valve body 1 and a reflux cavity 17; the valve body 1 is also provided with a return port 12 which is communicated with a return cavity 17.
The air inlet 11 and the air outlet 13 in this embodiment are provided on opposite side walls of the valve chamber 15.
The valve rod 2 is movably disposed in the valve chamber 15.
The valve plug 3 is accommodated in the backflow cavity 17 and can reciprocate relative to the backflow cavity 17, is arranged opposite to the first port of the valve cavity 15 and is connected with the first end of the valve rod 2, and the valve cavity 15 and the air outlet cavity 14 are opened and closed through the movement of the valve plug 3.
In this embodiment, the valve plug 3 is provided with a groove 31 with an inverted "U" structure, the second elastic component 6 is accommodated in the groove 31, and an inlet of the groove 31 is communicated with the backflow cavity 17.
The valve plug 3 is arranged at the first port 151 of the valve cavity 15 and the inlet position of the air outlet cavity 14; the upper end surface of the valve plug 3 may block or open the first port 151 of the valve chamber 15, and the sidewall of the valve plug may block or open the inlet of the outlet chamber 14.
A first elastic assembly 5 disposed between the valve plug 3 and the inner wall of the valve body 1 for providing a driving force for resetting the valve plug 3; comprising a spring seat 61 and a spring 62 provided on the inner wall of the valve body 1;
the spring 62 is sleeved on the spring seat 61, and two ends of the spring 62 respectively abut against the bottom surface of the spring seat 61 and the bottom surface of the groove 31;
the first end of the valve stem 2 drives the bottom wall of the connecting groove 31.
The flexible valve 6 is sealingly disposed over the second port 152 of the valve chamber 15 and drivingly connected to the second end of the valve stem 2. The outer periphery of the flexible valve clack is arranged on the magnet 41 and the end face of the valve body 1.
The driving device 4 is in driving connection with the second end of the valve rod 2 and comprises a magnet 41, an accommodating cavity 43 is formed in the magnet 41, an electromagnet 42 is movably accommodated in the accommodating cavity 43, and the electromagnet 42 is in driving connection with the second end of the valve rod 2;
the magnetism generated when the electromagnet 42 is energized is repulsive to the magnetism of the magnet 41; the magnet 41 is provided with an air port 44 communicated with the accommodating cavity 43;
the air inlet 11 is connected with a gas pipeline, the air outlet 13 is connected with an inlet of the gas distribution system 12, the backflow port 12 is connected with an air outlet of the gas distribution system 12, and the air port 44 is communicated with an air outlet of the fan 2.
In this embodiment, the end surface area of the first port 151 of the valve chamber is equal to the port area of the second port 152 of the valve chamber.
The air inlet 11 of the pressure stabilizing valve is connected with the gas pipeline 83, the air outlet 13 is connected with the inlet of the gas distribution system 12, the reflux port 12 is connected with the air outlet of the gas distribution system 12, and the air port 44 is communicated with the air outlet of the fan 2.
The gas distribution system, the electromagnet and the fan are all electrically connected with a control circuit (not shown in the figure).
The working principle of the pressure stabilizing burner in the invention is illustrated by taking a water heater as an example.
According to the water temperature requirement set by a user, the control circuit supplies corresponding current to the electromagnet, and simultaneously starts the fan at an adaptive rotating speed.
The electromagnet is electrified to generate magnetism and repel the magnet, the electromagnet drives the valve rod to move downwards, the valve rod drives the valve plug to move downwards, and the spring is extruded; the valve plug moves downwards to open a first port of the valve cavity, and simultaneously opens an inlet of the air outlet cavity, so that the valve cavity is communicated with the air outlet cavity, and fuel gas in the fuel gas pipeline enters an air inlet of the pressure stabilizing valve, enters the air outlet cavity through the valve cavity, and is discharged from the air outlet to enter a fuel gas distribution system; the combustion of the fuel gas in the fire row generates heat to heat the water flow.
The distance the valve plug moves down, i.e. the opening of the inlet of the air outlet chamber, is controlled by the current applied to the coil.
When the gas pressure fluctuates, the pressure P1 in the valve cavity of the pressure stabilizing valve is increased, the outlet pressure P2 of the gas distribution system is fed back into the pressure stabilizing valve, enters the backflow cavity from the backflow port and then enters the groove of the valve plug, the groove is pushed upwards, the force applied to the spring is reduced, the piston moves upwards under the action of the spring force, the opening of the inlet of the gas outlet cavity is reduced, and therefore the gas pressure constantly entering the inlet of the gas distribution system is achieved.
Normally, the displacement of the valve stem is controlled by the current of the solenoid valve. When the water heater is continuously used for a long time, the coil on the electromagnet continuously heats, the resistance of the coil changes, the force applied to the valve rod changes, at the moment, the outlet pressure of the fan is fed back into the accommodating cavity through the air port and acts on the valve, the valve rod displacement caused by the change of the resistance of the coil is compensated, and therefore the displacement of the valve rod, namely the opening of the air outlet, is accurately and constantly controlled.
Claims (6)
1. A constant pressure burner comprising: a combustion unit (8) and a fan (9) arranged in the housing (7); the combustion unit (8) is connected with a gas pipeline (83);
the method is characterized in that:
the fan (9) is arranged below the shell (7), and an air outlet of the fan (9) is connected with the bottom of the shell and faces the combustion unit (8) and is used for blowing air from the bottom to the combustion unit (8);
the combustion unit (8) comprises a fire row (81) and a gas distribution system (82) for supplying gas to the fire row (81);
a pressure regulating valve for constant gas pressure into the combustion unit (8), comprising:
the valve body (1) is internally provided with a valve cavity (15) communicated with an air inlet (11) on the valve body (1), an air outlet cavity (14) communicated with an air outlet (13) on the valve body (1) and a reflux cavity (17); the valve body (1) is also provided with a backflow port (12) communicated with the backflow cavity (17);
a valve rod (2) movably arranged in the valve cavity (15);
the valve plug (3) is arranged in the backflow cavity (17) in a manner of being capable of moving towards the first port of the valve cavity (15), is connected with the first end of the valve rod (2), and is used for switching on and off the valve cavity (15) and the air outlet cavity (14) through movement of the valve plug (3);
a first elastic component (5) arranged between the valve plug (3) and the inner wall of the valve body (1) and used for providing a driving force for resetting the valve plug (3);
a flexible valve (6) sealingly arranged at a second port of the valve chamber (15) and drivingly connected to a second end of the valve stem (2);
the driving device (4) is in driving connection with the second end of the valve rod (2) and comprises a magnet (41), a containing cavity (43) is formed in the magnet (41), an electromagnet (42) is movably contained in the containing cavity (43), and the electromagnet (42) is in driving connection with the second end of the valve rod (2);
the magnetism generated when the electromagnet (42) is electrified is repulsive to the magnetism of the magnet (41); the magnet (41) is provided with an air port (44) communicated with the accommodating cavity (43);
the gas inlet (11) is connected with the gas pipeline, the gas outlet (13) is connected with the inlet of the gas distribution system (82), the backflow port (12) is connected with the gas outlet of the gas distribution system (82), and the gas port (44) is communicated with the gas outlet of the fan (9).
2. The constant pressure burner of claim 1, wherein: the valve plug (3) is provided with a groove (31), the first elastic component (5) is accommodated in the groove (31), and an inlet of the groove (31) is communicated with the backflow cavity (17).
3. The constant pressure burner according to claim 2, characterized in that said recess (31) is of inverted "U" configuration.
4. The constant pressure burner of claim 2, wherein: the first elastic component (5) comprises a spring seat (61) and a spring (62) which are arranged on the inner wall of the valve body (1);
the spring (62) is sleeved on the spring seat (61), and two ends of the spring (62) are respectively abutted against the bottom surface of the spring seat (61) and the bottom surface of the groove (31);
the first end of the valve rod (2) is in driving connection with the bottom wall of the groove (31).
5. The constant pressure burner according to any one of claims 1 to 4, characterized in that the end surface area of the first port (151) of the valve chamber is equal to the port area of the second port (152) of the valve chamber.
6. The constant pressure burner according to claim 5, characterized in that said fan (9) is a direct current variable frequency fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434016.3A CN109958997B (en) | 2017-12-26 | 2017-12-26 | Constant pressure burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434016.3A CN109958997B (en) | 2017-12-26 | 2017-12-26 | Constant pressure burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109958997A CN109958997A (en) | 2019-07-02 |
| CN109958997B true CN109958997B (en) | 2024-04-16 |
Family
ID=67022128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711434016.3A Active CN109958997B (en) | 2017-12-26 | 2017-12-26 | Constant pressure burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109958997B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2276245A1 (en) * | 1996-08-06 | 1998-01-22 | Clyde C. Bryant | Improved internal combustion engine and working cycle |
| CA2282032A1 (en) * | 1999-02-04 | 2000-08-04 | Class 1, Inc. | Aerial work platform boom having ground and platform controls linked by a controller area network |
| CN101922578A (en) * | 2010-09-06 | 2010-12-22 | 周智宇 | Water backflow preventing valve and water backflow preventing and gas leakage preventing automatic self-closing gas valve |
| CN204805563U (en) * | 2015-05-26 | 2015-11-25 | 保登科技股份有限公司 | Electromagnetism proportional valve of valve is sealed by chamber of always admitting air |
| CN205877312U (en) * | 2016-06-20 | 2017-01-11 | 广东铃木智能科技有限公司 | Surge damping valve for gas heater |
| CN207880829U (en) * | 2017-12-26 | 2018-09-18 | 宁波方太厨具有限公司 | A kind of constant pressure combustion device |
-
2017
- 2017-12-26 CN CN201711434016.3A patent/CN109958997B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2276245A1 (en) * | 1996-08-06 | 1998-01-22 | Clyde C. Bryant | Improved internal combustion engine and working cycle |
| CA2282032A1 (en) * | 1999-02-04 | 2000-08-04 | Class 1, Inc. | Aerial work platform boom having ground and platform controls linked by a controller area network |
| CN101922578A (en) * | 2010-09-06 | 2010-12-22 | 周智宇 | Water backflow preventing valve and water backflow preventing and gas leakage preventing automatic self-closing gas valve |
| CN204805563U (en) * | 2015-05-26 | 2015-11-25 | 保登科技股份有限公司 | Electromagnetism proportional valve of valve is sealed by chamber of always admitting air |
| CN205877312U (en) * | 2016-06-20 | 2017-01-11 | 广东铃木智能科技有限公司 | Surge damping valve for gas heater |
| CN207880829U (en) * | 2017-12-26 | 2018-09-18 | 宁波方太厨具有限公司 | A kind of constant pressure combustion device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109958997A (en) | 2019-07-02 |
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