阅读说明：本技术 一种燃烧器及应用该燃烧器的蒸汽发生系统 (Combustor and steam generation system applying same ) 是由 夏光超 于 2021-07-22 设计创作，主要内容包括：本发明属于蒸汽发生器技术领域,具体涉及一种燃烧器及应用该燃烧器的蒸汽发生系统。该燃烧器包括燃烧室、预混管以及进风管,燃烧室的炉腔、预混管管腔以及进风管的直管段管腔共同配合形成直通式的竖向通道；燃烧室外包覆有用于构成炉膛的炉膛室,所述炉膛室的室壁处开设连通管从而连通至外部环境；其具备结构紧凑、体积小巧、噪音低、节能以及燃烧效率高的优点。本发明的蒸汽发生系统包括燃烧器；以便在降低操作门槛的同时,有效提升蒸汽发生器的点火效率和使用寿命。(The invention belongs to the technical field of steam generators, and particularly relates to a burner and a steam generation system using the same. The combustor comprises a combustion chamber, a premixing pipe and an air inlet pipe, wherein a furnace chamber of the combustion chamber, a pipe cavity of the premixing pipe and a pipe cavity of a straight pipe section of the air inlet pipe are matched together to form a straight-through vertical channel; the combustion chamber is externally covered with a hearth chamber for forming a hearth, and the chamber wall of the hearth chamber is provided with a communicating pipe so as to be communicated to the external environment; it has compact structure, small in size, low noise, energy saving and high combustion efficiency. The steam generating system of the present invention includes a burner; so as to effectively improve the ignition efficiency and the service life of the steam generator while reducing the operation threshold.)

1. A burner, characterized by: the combustion chamber, the premixing pipe (a1) and the air inlet pipe (a2) are sequentially arranged from bottom to top along the vertical direction, the air inlet pipe (a2) is an L-shaped pipe, and the air inlet pipe (a3) penetrates through the bottom end face of the air inlet pipe (a2) from bottom to top and then extends into a straight pipe section cavity of the air inlet pipe (a 2); the furnace chamber of the combustion chamber, the tube cavity of the premixing tube (a1) and the tube cavity of the straight tube section of the air inlet tube (a2) are matched together to form a straight-through vertical channel; the combustion chamber is externally covered with a hearth chamber (a4) for forming a hearth, and the wall of the hearth chamber (a4) is provided with a communicating pipe so as to be communicated to the external environment.

2. A burner as claimed in claim 1, wherein: the combustion chamber comprises an inner mesh enclosure (a5) and an outer mesh enclosure (a6) which are coaxially arranged, the inner mesh enclosure (a5) and the outer mesh enclosure (a6) are both in a barrel-shaped mesh enclosure shape with a downward barrel opening, the cover openings of the two mesh enclosures are fixed on a bottom plate, and a top nozzle of a premixing pipe (a1) penetrates through the bottom plate and is communicated with a cover cavity of the inner mesh enclosure (a 5).

3. A burner as claimed in claim 2, wherein: the inner mesh cover (a5) and the outer mesh cover (a6) are both covered by a layer of metal fiber sintered felt.

4. A steam generating system using the burner of claim 1, 2, 3 or 4, wherein: comprising a burner according to claim 1 or 2 or 3, and the furnace chamber (a4) is located in the chamber of the heat exchange water tank (a7) so as to be covered by water, the bottom wall of the heat exchange water tank (a7) constituting said floor; a heat exchange smoke tube (a8) with a heat exchange function is arranged in the heat exchange water tank (a7), the inlet of the heat exchange smoke tube (a8) is communicated with the hearth chamber (a4), the outlet of the heat exchange smoke tube (a8) is communicated with the external atmospheric environment, and a first-stage steam outlet is formed in the cavity of the heat exchange water tank (a 7); a steam box (a9) is arranged above the heat exchange water box (a7), the steam box (a9) and the heat exchange water box (a7) share a top plate, and a communication hole is formed in the top plate in a penetrating mode so as to form the primary steam outlet; the system also comprises a steam filter cover (a10) which is shaped like a barrel with an upward opening, wherein the barrel wall of the steam filter cover (a10) is provided with a steam hole, and the steam filter cover (a10) is buckled at the communication hole from bottom to top so as to communicate the two; a secondary steam outlet is arranged at the steam box (a9) so as to be connected with an external steam device; a water-vapor separation baffle (a11) is arranged at the top hole end of the communication hole; the water-vapor separation baffle (a11) extends upwards and then transversely extends to the position right above the communication hole; the secondary steam outlet is arranged on the top wall of the steam box (a9) above or behind the water-steam separation baffle (a 11).

5. The steam generation system of claim 4, wherein: the communication pipe lead vertically penetrates through the top wall of the hearth chamber (a4), and the communication pipe forms an explosion-proof pipe (a12) for avoiding the pressure in the hearth chamber (a4) from exceeding; a pressure relief valve (a13) is arranged at the top pipe orifice of the explosion-proof pipe (a 12); the pressure relief valve (a13) comprises a horizontal rotating shaft arranged at one side wall of the top nozzle of the explosion-proof tube (a12), and the horizontal rotating shaft is hinged with a port closing plate, so that the port closing plate can press and close the top nozzle of the explosion-proof tube (a12) from top to bottom under the hinging action of the horizontal rotating shaft.

6. The steam generation system of claim 4, wherein: the system also comprises a water supply tank (a14), the heat exchange smoke tube (a8) extends into the water supply tank (a14) and is coated by water liquid in the water supply tank (a14) for heat exchange, and then extends out of the water supply tank (a14) and is communicated with the external atmosphere; the outer wall of the heat exchange water tank (a7) is in a two-section stepped shaft shape with a thick upper part and a thin lower part, the bottom wall of the small shaft diameter section of the heat exchange water tank (a7) forms the bottom plate, and the outer diameter of the hearth chamber (a4) is smaller than that of the small shaft diameter section; the small shaft diameter section is radially penetrated with a water inlet which is communicated with a water replenishing tank through a water replenishing pipeline (a 15); the hearth chamber (a4) is internally provided with a heat exchange winding, and the water inlet end and the water outlet end of the heat exchange winding penetrate through the outer wall of the hearth chamber so as to be communicated with the heat exchange water tank (a 7).

7. The steam generation system of claim 4, wherein: the system also comprises an air-air assembly for performing air supply and air supply operations on the air inlet pipe (a3) and the air inlet pipe (a 2); the air-air assembly comprises a main air pipe (30) with an air inlet communicated with a fan (21) and an air outlet communicated with an air inlet pipe (a2), branch pipelines are arranged on the side wall of the main air pipe (30) to form a shunt pressure relief pipe, a sealing plate (31) used for sealing the air outlet end is arranged at the air outlet end of the shunt pressure relief pipe, and air relief holes (31a) communicated with the shunt pressure relief pipe and the cavity of the main air pipe (30) are arranged on the sealing plate (31) in a penetrating manner; the device also comprises a flow dividing baffle plate (32) which is attached to the sealing plate (31) in a surface mode, so that the adjustment operation of the wind flux at the wind discharge hole (31a) is realized through the transverse movement or the rotation action of the flow dividing baffle plate (32) relative to the wind discharge hole (31a) at the sealing plate (31).

8. The steam generation system of claim 7, wherein: the seal plate (31), the flow dividing baffle plate (32) and the flow dividing pressure relief pipe are coaxially arranged, and the air adjusting shaft (34) which is coaxial with the flow dividing baffle plate (32) and drives the flow dividing baffle plate (32) to rotate is connected with the air adjusting shaft (41) at the air passage through an eccentric hinged connecting rod (35) or chain transmission or gear transmission, so that the linkage action of the air passage and the air passage is realized; the flow dividing and pressure releasing pipe comprises a main flow dividing and pressure releasing pipe (30a) and an auxiliary flow dividing and pressure releasing pipe (30b) which are parallel to each other in axial line, eccentric shafts (34a) are arranged on the outer walls of flow dividing baffles (32) at the positions of the two groups of flow dividing and pressure releasing pipes, and two ends of a connecting rod (36) extending along the axial direction of the main air pipe (30) are horizontally hinged to the eccentric shafts (34a), so that the linkage action of the flow dividing baffles (32) at the positions of the two groups of flow dividing and pressure releasing pipes is realized.

9. The steam generation system of claim 4, wherein: the system also comprises an air-air assembly for performing air supply and air supply operations on the air inlet pipe (a3) and the air inlet pipe (a 2); the air-air assembly comprises an air path module (10) and an air path module (20); the air path module (10) comprises an air inlet path (11) communicated with an air source, and an electromagnetic proportional valve used for controlling the air inlet amount of the air inlet path (11) is arranged at the air inlet path; the air path module (20) comprises a fan (21), the air outlet end of the fan (21) is communicated with the air inlet path, a damper (23) is arranged on the air inlet path, the damper (23) is driven by an air adjusting shaft (34) to adjust the air inlet amount of the air inlet path, and an angle sensor (24) for monitoring the rotation angle of the air adjusting shaft (34) is arranged beside the air adjusting shaft (34); the signal output end of the angle sensor (24) is electrically connected with the signal input end of the controller, and the signal output end of the controller is electrically connected with the electromagnetic proportional valve.

10. The steam generation system of claim 4, wherein: the air inlet channel (11) is a parallel air channel, the electromagnetic proportional valve comprises a main fire electromagnetic proportional valve (14b) and a normally open fire electromagnetic proportional valve (14a), one group of parallel air channels are communicated to an air inlet of the air inlet pipe through the main fire electromagnetic proportional valve (14b), and the other group of parallel air channels are communicated to a bottom air inlet of a normally open fire combustor positioned beside the combustion chamber through the normally open fire electromagnetic proportional valve (14 a); the air inlet path comprises a first parallel air passage (22a) and a second parallel air passage (22b), the first parallel air passage (22a) is communicated to an air inlet of the combustor, and the second parallel air passage (22b) is communicated to an air inlet of the normally open flame combustor; the damper (23) is arranged on the first parallel air passage (22a) and is used for opening and closing and adjusting the air inlet amount of the first parallel air passage (22 a); the first parallel air passage (22a) is also provided with a front air door (25) for preliminarily adjusting the air inlet amount of the first parallel air passage (22a), and the front air door (25) is arranged at a section of an air inlet pipe (a2) between the adjusting air door (23) and the second parallel air passage (22 b);

the gas circuit module (10) also comprises a main fire electromagnetic switch valve (15b) and a normally open fire electromagnetic switch valve (15 a); the normally open fire electromagnetic proportional valve (14a) and the main fire electromagnetic proportional valve (14b) are connected in parallel to form the main gas control module, and the normally open fire electromagnetic switch valve (15a) and the main fire electromagnetic switch valve (15b) are connected in parallel to form the standby gas control module; the air outlet of the main air passage (13) is divided into four groups of branch air passages which are connected in parallel; the first parallel branch gas path (16a) is communicated with a main gas path (13) at the position of the combustor through a main fire electromagnetic switch valve (15b), and the second parallel branch gas path (16b) is communicated with a normally open fire gas path (12) at the position of the normally open fire combustor through a normally open fire electromagnetic switch valve (15 a); the third parallel branch gas path (16c) is communicated with a normally open flame gas path (12) at a normally open flame burner through a normally open flame electromagnetic proportional valve (14a), and the fourth parallel branch gas path (16d) is communicated with a main gas path (13) at the burner through a main flame electromagnetic proportional valve (14 b); the gas circuit module (10) further comprises a control switch (17) for realizing one conduction of a gas outlet path of the gas inlet circuit (11) between the main gas control module and the standby gas control module, and the control switch (17) is electrically connected with control ends of the four groups of parallel branch gas circuits through a controller.

Technical Field

The invention belongs to the technical field of steam generators, and particularly relates to a burner and a steam generation system using the same.

Background

The small-sized steam generating system is widely applied to hotels, guest houses, restaurants, food processing enterprises, washing industries and the like. The existing steam generators in the market generally have the defects of high energy consumption, low heat efficiency, high working noise and the like, so that carbon emission and waste heat emission are increased while a large amount of fuel gas energy is wasted in China every year, and urgent solution is needed.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned deficiencies of the prior art, and to provide a burner which provides stable heat output and has the advantages of compact structure, small size, low noise, energy saving and high combustion efficiency. Another object of the present invention is to provide a steam generating system using the burner, so as to effectively improve the ignition efficiency and the lifespan of the steam generator while lowering the operation threshold.

In order to achieve the purpose, the invention adopts the following technical scheme:

a burner, characterized by: the air inlet pipe penetrates through the bottom end surface of the air inlet pipe from bottom to top and extends into a straight pipe section cavity of the air inlet pipe; the furnace chamber of the combustion chamber, the tube cavity of the premixing tube and the tube cavity of the straight tube section of the air inlet tube are matched together to form a straight-through vertical channel; the combustion chamber is externally covered with a hearth chamber for forming a hearth, and the chamber wall of the hearth chamber is provided with a communicating pipe so as to be communicated to the external environment.

Preferably, the combustion chamber comprises an inner mesh enclosure and an outer mesh enclosure which are coaxially arranged, the inner mesh enclosure and the outer mesh enclosure are both in a barrel-shaped mesh enclosure shape with a downward barrel opening, the cover openings of the two mesh enclosures are fixed on the bottom plate, and a top pipe opening of the premixing pipe penetrates through the bottom plate and is communicated with a cover cavity of the inner mesh enclosure.

Preferably, a layer of metal fiber sintered felt is covered on both the inner mesh cover and the outer mesh cover.

Preferably, a steam generation system using the burner is characterized in that: the burner is included, the hearth chamber is positioned in the chamber of the heat exchange water tank and is coated by water liquid, and the bottom tank wall of the heat exchange water tank forms the bottom plate; a heat exchange smoke pipe with a heat exchange function is arranged in the heat exchange water tank, the inlet of the heat exchange smoke pipe is communicated with the hearth chamber, the outlet of the heat exchange smoke pipe is communicated with the external atmospheric environment, and a primary steam outlet is formed in the tank cavity of the heat exchange water tank; a steam box is arranged above the heat exchange water tank, the steam box and the heat exchange water tank share a top plate, and a communication hole is formed in the top plate in a penetrating mode so as to form the primary steam outlet; the system also comprises a steam filter cover which is shaped like a barrel with an upward opening, wherein the barrel wall of the steam filter cover is provided with a steam hole, and the steam filter cover is buckled at the communication hole from bottom to top so as to communicate the steam filter cover and the communication hole; a secondary steam outlet is arranged at the steam box so as to be connected with an external steam device; a water-vapor separation baffle is arranged at the top hole end of the communicating hole; the water-vapor separation baffle extends upwards and then transversely extends to the position right above the communicating hole; and the secondary steam outlet is arranged on the top wall of the steam box above or behind the water-steam separation baffle.

Preferably, the lead of the communicating pipe vertically penetrates through the top wall of the hearth chamber, and the communicating pipe forms an explosion-proof pipe for avoiding the pressure in the hearth chamber from exceeding the limit; a pressure relief valve is arranged at the top pipe orifice of the explosion-proof pipe; the pressure release valve comprises a horizontal rotating shaft arranged on one side wall of the top pipe orifice of the explosion-proof pipe, and the horizontal rotating shaft is hinged with a port sealing plate, so that the port sealing plate can be pressed and sealed from top to bottom under the hinging action of the horizontal rotating shaft.

Preferably, the system also comprises a water replenishing tank, the heat exchange smoke pipe extends into the water replenishing tank and is coated by water liquid in the water replenishing tank for heat exchange, and then the heat exchange smoke pipe extends out of the water replenishing tank and is communicated with the external atmospheric environment; the outer wall of the heat exchange water tank is in a two-section stepped shaft shape with a thick upper part and a thin lower part, the bottom wall of a small shaft diameter section of the heat exchange water tank forms the bottom plate, and the outer diameter of the hearth chamber is smaller than the outer diameter of the small shaft diameter section; the small-shaft-diameter section is radially penetrated with a water inlet which is communicated with a water replenishing tank through a water replenishing pipeline; the hearth chamber is internally provided with a heat exchange winding, and the water inlet end and the water outlet end of the heat exchange winding penetrate through the outer wall of the hearth chamber so as to be communicated with the heat exchange water tank.

Preferably, the system also comprises an air-air assembly for performing air supply and air supply operations on the air inlet pipe and the air inlet pipe; the air-air assembly comprises a main air pipe, wherein an air inlet is communicated with the fan, an air outlet is communicated with the air inlet pipe, a branch pipeline is arranged on the side wall of the main air pipe so as to form a shunting pressure relief pipe, a sealing plate used for sealing the air outlet end is arranged at the air outlet end of the shunting pressure relief pipe, and air relief holes communicated with the shunting pressure relief pipe and the cavity of the main air pipe are arranged on the sealing plate in a penetrating manner; the device also comprises a shunting baffle plate which is attached to the sealing plate in a surface mode, so that the adjustment operation of the wind flux at the wind discharge hole is realized through the transverse movement or the rotation action of the shunting baffle plate relative to the wind discharge hole at the sealing plate.

Preferably, the seal plate, the flow dividing baffle plate and the flow dividing pressure relief pipe are coaxially arranged, and the air adjusting shaft which is coaxial with the flow dividing baffle plate and drives the flow dividing baffle plate to rotate is connected with the air adjusting shaft at the air passage through an eccentric hinged connecting rod or chain transmission or gear transmission, so that the linkage action of the air passage and the air passage is realized; the shunting pressure relief pipe comprises a main shunting pressure relief pipe and an auxiliary shunting pressure relief pipe which are parallel to each other in axial line, eccentric shafts are uniformly arranged on the outer walls of the shunting baffles at the two groups of shunting pressure relief pipes, and two ends of a connecting rod extending along the axial direction of the main air pipe are horizontally hinged on the eccentric shafts, so that the linkage action of the shunting baffles at the two groups of shunting pressure relief pipes is realized; the extending end of the air adjusting shaft at the main branch flow pressure relief pipe radially penetrates through the main air pipe, and a small connecting rod is arranged at the extending end so as to be hinged with the eccentric hinged connecting rod; the length direction of the eccentric hinged connecting rod is parallel to the radial direction of the main air pipe and perpendicular to the extending direction of the extending end of the air adjusting shaft; the extending end of the air adjusting shaft at the auxiliary shunting pressure relief pipe radially penetrates through the main air pipe in the same way; the extension end of two sets of wind adjustment shafts all overlaps and is equipped with the pressure spring, and pressure spring one end is supported tightly in main tuber pipe outer wall department, and the other end of pressure spring is along extending the extending direction of end and with the spacing nut of fastening on the wind adjustment shaft or spacing inter-plate formation support tight fit to the interior terminal surface that makes the reposition of redundant personnel baffle can pass through the elastic restoring force of pressure spring and paste tightly in the outer terminal surface department of shrouding.

Preferably, the system also comprises an air-air assembly for performing air supply and air supply operations on the air inlet pipe and the air inlet pipe; the air-air assembly comprises an air path module and an air path module; the air path module comprises an air inlet path communicated with an air source, and an electromagnetic proportional valve used for controlling the air inlet amount of the air path module is arranged at the air inlet path; the air path module comprises a fan, an air outlet end of the fan is communicated with an air inlet path, a damper is arranged on the air inlet path, the damper is driven by an air adjusting shaft to adjust the air input of the air inlet path, and an angle sensor for monitoring the rotation angle of the air adjusting shaft is arranged beside the air adjusting shaft; the signal output end of the angle sensor is electrically connected with the signal input end of the controller, and the signal output end of the controller is electrically connected with the electromagnetic proportional valve.

Preferably, the air inlet channels are parallel air channels, the electromagnetic proportional valve comprises a main fire electromagnetic proportional valve and a normally open fire electromagnetic proportional valve, one group of parallel air channels are communicated to the air inlet of the air inlet pipe through the main fire electromagnetic proportional valve, and the other group of parallel air channels are communicated to the bottom air inlet of the normally open fire combustor located beside the combustion chamber through the normally open fire electromagnetic proportional valve; the air inlet path comprises a first parallel air path and a second parallel air path, the first parallel air path is communicated to an air inlet of the combustor, and the second parallel air path is communicated to an air inlet of the normally open flame combustor; the regulating air door is arranged on the first parallel air passage and is used for opening and closing and adjusting the air inlet volume of the first parallel air passage; the first parallel air passage is also provided with a front air door for preliminarily adjusting the air inlet amount of the first parallel air passage, and the front air door is arranged at a section of air inlet pipeline between the air door and the second parallel air passage;

the gas circuit module also comprises a main fire electromagnetic switch valve and a normally open fire electromagnetic switch valve; the normally open fire electromagnetic proportional valve and the main fire electromagnetic proportional valve are connected in parallel to form the main fuel gas control module, and the normally open fire electromagnetic switch valve and the main fire electromagnetic switch valve are connected in parallel to form the standby fuel gas control module; the air outlet of the main air passage is divided into four groups of branch air passages in parallel; the first parallel branch gas circuit is communicated with a main gas circuit at the position of the burner through a main fire electromagnetic switch valve, and the second parallel branch gas circuit is communicated with a normally open fire gas circuit at the position of the normally open fire burner through a normally open fire electromagnetic switch valve; the third parallel branch gas path is communicated with a normally open fire gas path at the normally open fire burner through a normally open fire electromagnetic proportional valve, and the fourth parallel branch gas path is communicated with a main gas path at the burner through a main fire electromagnetic proportional valve; the gas circuit module also comprises a control switch for realizing that one of the gas outlet paths of the gas inlet circuit is switched on between the main gas control module and the standby gas control module, and the control switch is electrically connected with the control ends of the four groups of parallel branch gas circuits through a controller.

The invention has the beneficial effects that:

1) by the scheme, the sealed hearth chamber is used, so that the effective constraint effect on heat energy is realized; meanwhile, a unique layout mode of vertically arranged combustion chambers, premixing pipes and air inlet pipes is adopted, so that a straight-through vertical channel is formed. On the one hand, the straight-through structure of the vertical channel ensures that the distance between wind and gas is shortest and no extra obstruction exists when the wind and the gas enter the hearth chamber through the vertical channel, thereby greatly reducing the whole working noise and synchronously ensuring the compactness in volume. On the other hand, when necessary, through directly pouring into the washing liquid in to the communicating pipe, the washing liquid can be directly followed above-mentioned vertical passageway and is discharged sealed furnace outdoor to realized the convenient clean function to the sealed furnace room that can't clean at ordinary times, kill many birds with one stone.

2) Furthermore, the invention adopts a double-layer mesh enclosure structure, ensures the straight-through performance of the air, the gas and the cleaning solution through meshes, and simultaneously realizes the secondary deep mixing effect of the air-gas mixture in the premixing pipe by utilizing the meshes and even the space between the two layers of mesh enclosures, thereby effectively improving the actual combustion efficiency. Correspondingly, the heat resistance and compact pore paths of the metal fiber sintered felt can also effectively improve the mixing effect, and the metal fiber sintered felt can be used independently or in combination.

3) On the basis of the structure, the invention also provides a steam generation system; on one hand, on the internal structure, the steam generation system realizes effective discharge of steam and efficient utilization of high-heat smoke through the design of the heat exchange water tank, the heat exchange smoke pipe and the steam box; on the other hand, on the external air supply, the invention also provides an air-air assembly, so that the requirement of accurate air-fuel ratio adjustment under different firepower is met. Specifically, the method comprises the following steps:

for a mechanical wind-air assembly: different from the traditional in-pipe control mode which causes inaccurate control of the air-fuel ratio of the stove due to the existence of nonlinear adjustment defects, the invention creatively provides a unique concept of 'flow distribution outside the pipe', and the invention arranges branch pipes beside the original main air pipe and arranges a flow distribution baffle plate which is provided with an air leakage hole of a sealing plate and can open and close the air leakage hole at the air outlet ends of the branch pipes. At this time, under the condition that the rotating speed and the air output of the fan are not changed, the theoretical air output Q0 is equal to the air output Q required by the burner₁+ bypass split air flowQ₂(ii) a In other words, when the shunting baffle is started and the large enough air leakage hole is exposed, the bypass shunting air quantity of the branch pipeline is increased, so that the air quantity required by the combustor communicated with the air outlet of the main air pipe is reduced, and the on-line convenient adjustment function of the air-fuel ratio of the stove is ingeniously realized on the premise that the fan keeps the current rotating speed. It should be noted that, because the diversion baffle and the seal plate are independent of the main pipe body, on one hand, the installation space of the main air pipe is not occupied, and even the additional installation can be directly carried out on the original stove, the updating cost of the stove is lower; meanwhile, the fan does not need to frequently adjust the rotating speed, and the service life can be obviously prolonged. On the other hand, the relative shrouding of reposition of redundant personnel baffle is the laminating formula action, and the opening and closing increase and decrease of letting out the wind hole is also the linearization adjustment, more does benefit to and carries out the accurate regulation to the kitchen range air-fuel ratio under the different firepowers.

For a sensor-controlled wind-air assembly: the invention abandons a plurality of defects brought by the traditional air-air independent control or air control mode; by breaking through thinking of the shackle and adopting a unique design idea of controlling air by wind, the actual operation threshold of the invention is effectively reduced, and the invention has the advantage of high ignition reliability. In actual design, the air-gas linkage control system utilizes a controllable fire valve structure, the air path is controlled, the opening and closing amplitude of the air damper is sensed through the angle sensor, then a signal is transmitted to a controller such as a PLC, the controller carries out follow-up linkage control on the main fire electromagnetic proportional valve and the normally open fire electromagnetic proportional valve, and finally the air-gas linkage function is achieved. In addition, on the one hand, through the gas circuit switching function of control switch for whole device has satisfied flame-out protection valve's inherent function at first, also promptly: the main gas control module breaks down, and the gas circuit cannot be smooth, so that each electronic module for controlling the main gas control module is automatically closed, and the main gas control module is closed at the moment, and flameout protection is realized. On the other hand, when the main gas control module is flameout for protection, the kitchen is still in a peak use state or at least in a use state, and at the moment, maintenance personnel cannot enter the kitchen with a hot fire facing the sky immediately for field maintenance. Therefore, only the control switch needs to be turned over, the gas inlet circuit is enabled to be communicated with the standby gas control module, the aim of firing the stove can be achieved through the standby gas control module under the flameout protection state, and the maintenance time points are staggered. When the kitchen is in an idle state, the kitchen can be maintained again, so that the actual economic benefit of a user is guaranteed on the premise of guaranteeing the use safety. It is worth noting that in the use process, the wind-gas linkage control is only the accurate linkage control of the main gas control module, and the standby gas control module only needs to realize the controllable opening and closing. In other words, the invention utilizes the precise controlled linkage function of the electromagnetic proportional valve, thereby realizing the purpose of regulating and controlling the fine proportion of the fuel gas at the main gas path very precisely and perfectly realizing the final effect of 'the gas moves along with the wind'. The normally open fire electromagnetic switch valve and the main fire electromagnetic switch valve are only responsible for opening and closing but not for precise adjustment, so that the simplification, the reliability and the low cost of the whole structure are ensured. Under a normal use state, the main gas control module comprises a normally open fire electromagnetic proportional valve and a main fire electromagnetic proportional valve; therefore, the opening and closing states of the normally open fire electromagnetic proportional valve and the main fire electromagnetic proportional valve can be accurately controlled through the controller or the single chip microcomputer, and therefore the function of timely adjusting the air inflow of the main air path and the normally open fire air path is achieved. Even if necessary, the function of nonlinear control of air inflow by the air intake can be realized by utilizing the precise action characteristic that the electromagnetic proportional valve is different from other valve bodies in an air control mode, so that the flame is always in the optimal combustion state when the stove is used. As for reserve gas control module group, it plays reserve control function occasionally after all, consequently need not to design precision assembly, only need can realize the break-make function of reserve gas circuit through control switch can to guarantee the price/performance ratio of global design, succinct mechanical structure also brings very high use reliability simultaneously, thereby satisfies the function that the homoenergetic reliably opened and close at any time.

Drawings

FIG. 1 is a schematic view of a burner configuration;

FIG. 2 is a diagram showing the state of the burner in cooperation with a heat exchange water tank;

FIG. 3 is a diagram showing the state of the burner, the heat exchange water tank, the steam tank and the water replenishing tank;

FIG. 4 is a schematic structural view of a refill tank;

FIG. 5 is a schematic structural view of one of the wind-air assemblies;

FIG. 6 is a schematic view of the linkage of two sets of shunt pressure relief pipes at the air-air assembly shown in FIG. 5;

FIG. 7 is an assembled state view of the wind/air assembly of FIG. 5;

FIGS. 8 and 9 are views illustrating another use of the wind-air assembly;

FIG. 10 is an electrical schematic diagram of the wind/air assembly of FIG. 8;

fig. 11 and 12 are general assembly views of the main gas control module and the standby gas control module;

FIG. 13 is a side view of the structure shown in FIG. 11;

FIGS. 14 and 15 are perspective views showing the arrangement positions of the front damper and the damper;

FIG. 16 is a cross-sectional view of a damper.

The actual correspondence between each label and the part name of the invention is as follows:

a-gas path B-wind path

a-burner a 1-premix tube a 2-air inlet tube a 3-air inlet tube a 4-furnace chamber

a 5-inner mesh enclosure a 6-outer mesh enclosure a 7-heat exchange water tank a 8-heat exchange smoke tube a 9-steam box

a 10-steam filtration cover a 11-water vapor separation baffle

a 12-explosion-proof tube a 13-pressure relief valve

a 14-water replenishing tank a 15-water replenishing pipeline b-normally open fire burner c-controller

10-gas circuit module 11-gas inlet circuit 12-normally open fire gas circuit 13-main gas circuit

14 a-normally open fire electromagnetic proportional valve 14 b-main fire electromagnetic proportional valve

15 a-normally open fire electromagnetic switch valve 15 b-main fire electromagnetic switch valve

16 a-a first parallel branch gas path 16 b-a second parallel branch gas path

16 c-a third parallel branch gas path 16 d-a fourth parallel branch gas path

17-control switch 18-one-way ball valve

19 a-main fire regulating valve 19 b-normally open fire regulating valve

19 c-gas pressure stabilizing valve 19 d-throttle valve

20-air path module 21-fan 22 a-first parallel air path 22 b-second parallel air path

23-damper 24-angle sensor 25-front damper

25 a-observation plate 25 b-waist-shaped adjusting hole 25 c-anchor column

30-main air duct 30 a-main shunt pressure relief pipe 30 b-auxiliary shunt pressure relief pipe

31-closing plate 31 a-air leakage hole 32-flow dividing baffle 33-fixed air door

34-wind adjusting shaft 34 a-eccentric shaft 34 b-radial rod 35-eccentric articulated connecting rod

36-connecting rod 37-dial

41-air adjusting shaft 42-adjusting handle

Detailed Description

For ease of understanding, the specific construction and operation of the present invention is further described herein with reference to FIGS. 1-16:

the specific structure of the present invention is shown in fig. 1-16, and the main structure thereof includes a steam generator with a burner a and an air-air assembly for supplying air to the steam generator, wherein:

the steam generator of the invention has a cylindrical structure, and the fuel is liquefied petroleum gas, natural gas, methane or blast furnace gas. During actual design, a gas pressure stabilizing valve 19c is needed to ensure that the gas input pressure of the equipment does not exceed the upper limit value of the gas pressure; the corresponding gas pressure switch is arranged at the outlet of the gas pressure stabilizing valve and used for ensuring that the pressure of the gas is within a certain pressure range and exceeds the range, and the gas pressure switch closes the gas channel. The fuel is sequentially input into the air inlet pipe a3 and the premixing pipe a1 through a fuel gas pressure stabilizing valve and a fuel gas pressure switch, fully premixed with the air conveyed by the air inlet pipe a1 in the premixing pipe a1 and then input into the combustion chamber. As shown in fig. 1, the combustion chamber is columnar, and has a structure of a double-cylinder nested structure formed by matching an inner mesh cover a5 and an outer mesh cover a6, wherein the inner mesh cover a5 and the outer mesh cover a6 are both honeycomb structures with open surfaces and are covered by special high-temperature-resistant metal fiber sintered felts. The premixed gas in the premixing pipe a1 is delivered to the combustion chamber for further mixing. Meanwhile, the metal fiber sintered felt can also promote the deep mixing of fuel gas and air. The combustion chamber is externally provided with a cylindrical hearth, namely a hearth chamber. As shown in fig. 2-3, a normally open flame burner b is also arranged beside the combustion chamber, and the normally open flame burner b is composed of a high-pressure ignition needle, a loop needle, a flame detection needle, a normally open flame nozzle and the like.

As shown in fig. 3, the entire hearth chamber a4 is divided into upper and lower portions which are directly connected, and the flame of the combustion chamber directly heats the lower portion of the hearth chamber. The whole hearth chamber a4 is soaked in water, the outer wall of the hearth chamber can be additionally provided with metal heat exchange fins to improve the heat exchange efficiency, and hot flue gas and after flame go upwards to enter the upper part of the hearth chamber to heat the upper hearth wall and a heat exchange winding which is wound by a thin-wall metal tube inside the upper hearth chamber and is internally provided with water. The central axis of the heat exchange winding is vertical, and the upper and lower ports of the heat exchange winding are communicated with water outside the hearth chamber a 4. The hot smoke gas for further temperature reduction enters a heat exchange smoke pipe a8 outside the hearth chamber a4 from the upper hearth, and the heat exchange smoke pipe a8 is composed of a smoke gas chamber with a lower boss, a metal coil pipe and a smoke gathering box. The lower boss smoke gas cavity is a convex cavity which extends outwards from the lower position of the upper hearth and is communicated with the upper hearth; the metal coil is a spiral metal tube winding wound by a thin-wall hollow metal tube; the cigarette gathering box is positioned above the upper hearth and is of a flat cavity structure. The low-level smoke inlet and the high-level smoke outlet of the plurality of metal coil pipes are respectively arranged on the smoke air cavity of the lower boss and the side wall of the smoke gathering box from inside to outside along the trend of the winding metal pipe in sequence; the hot flue gas enters the heat exchange smoke pipe a8 from the hearth chamber a4 and further exchanges heat with water outside the heat exchange smoke pipe a 8. After the smoke flows out of the cigarette collection box, the smoke passes through the upper side wall of the heat exchange water tank a7 through the metal coil and enters a water replenishing tank a14 arranged outside the heat exchange water tank a 7. The heat exchange water tank a7 is a container with a hearth chamber a4 and a heat exchange smoke tube a8 inside, and is filled with water. The refill tank a14 includes a metal float and valve assembly that controls the water level and inlet water to control the final water level of the device. After the tail end of the heat exchange smoke pipe a8 enters the water replenishing tank a14, the heat exchange smoke pipe exchanges heat with low-temperature tap water in the water replenishing tank a14, and finally the low-temperature tap water is discharged to the external atmospheric environment.

The water inlet of the water supplementing tank a14 is connected with municipal tap water, the water outlet is connected with the lower part of the heat exchange water tank a7 through a water supplementing pipeline a15, and the water level of the heat exchange water tank a7 is slightly higher than the upper surface of the cigarette gathering box. When the device is operated, steam-water mixture flows upwards into the steam filter cover a10 from the upper area of the hearth chamber a4, namely the upper hearth, and the annular gap between the heat exchange water tank a7 and the heat exchange flue. The steam filter cover a10 is a circular ring or a barrel-shaped coaming which is arranged in the middle area below the top plate of the heat exchange water tank a7, the steam filter cover a10 is positioned right above the upper hearth, the diameter of the steam filter cover a is smaller than that of the upper hearth, and a plurality of steam holes which are permeable to steam are arranged on the periphery of the steam filter cover a 10. After the steam-water mixture with certain kinetic energy upwards gushes to the top plate of the heat exchange water tank a7 along the annular gap, hot water can bounce and fall off after being blocked by the steam filter cover a10, and separated steam enters the primary steam outlet through the steam hole. In practical design, a primary water return pipe which is communicated with the low position of the heat exchange water tank a7 and is slightly higher than the water replenishing cut-off high position of the steam tank a9 can be arranged, so that a large amount of hot water separated from the steam filter cover a10 flows through the primary water return pipe from the high position of the heat exchange water tank a7 and flows back to the lower part of the heat exchange water tank a7 from the outside of the heat exchange water tank a7, and a large amount of hot water is prevented from entering the steam tank a9 through a primary steam outlet. The steam box a9 is positioned above the heat exchange water tank a7, and the middle partition plate is the top plate of the heat exchange water tank a 7; the primary steam outlet is positioned in the middle of the steam filter cover a10 and penetrates through the top plate of the heat exchange water tank a 7.

A water-vapor separation baffle plate a11 is arranged above the primary steam outlet, the water-vapor separation baffle plate a11 is positioned in the steam box a9 and is in an inverted L shape, the baffle plate of the upper transverse section of the water-vapor separation baffle plate is positioned right above the primary steam outlet, and the projection size of the water-vapor separation baffle plate is larger than that of the primary steam outlet. After the steam-water mixture impacts the baffle, the kinetic energy of water is reduced and rebounded to fall down and converge to a secondary water return pipe which is arranged at a steam box a9 and is far away from a secondary steam outlet. The secondary water return pipe communicates the bottoms of the heat exchange water tank a7 and the steam tank a9 from the outside of the heat exchange water tank a 7. The top of the steam box a9 is provided with a secondary steam outlet and a safety and instrument special pipe, and a pressure release valve a13, a thermometer, a pressure gauge and the like are connected to the safety and instrument special pipe. The side wall of the steam box a9 is provided with an inward-communicated check valve body which is inclined downwards at a small angle and plays a role of balancing the atmospheric pressure when the steam generator discharges water outwards. The upper part of the water replenishing tank a14 is communicated with the heat exchange water tank a7 and the steam tank a9 through metal pipes, and the pressure balance function is achieved. The invention can also be provided with a drain outlet, and sewage is discharged from the drain outlet after scale is removed by the scale remover. The equipment is provided with a fire observation hole consisting of high-temperature-resistant glass and a temperature-resistant stainless steel pipe, and a pipe fitting of the fire observation hole sequentially penetrates through a shell of the heat exchange water tank a7 and the wall of the lower hearth and is close to an ignition needle to observe the combustion conditions of normally open fire and main fire.

For the safety consideration of equipment and operators, the equipment is provided with a plurality of safety protection designs: when the steam exceeds a certain pressure (e.g. 80kPa), the apparatus is vented through a pressure relief valve a13 located at the explosion proof tube a12 as shown in fig. 2. When the water level of the heat exchange water tank a7 is lower than the top surface of the hearth chamber, the anti-dry device arranged on the side wall of the middle lower part of the heat exchange water tank a7 through the water level communicating pipe cuts off the power supply of the gas proportional valve to close the gas supply, and the ignition controller gives an alarm in sound. In order to prevent electric shock, the power supply supplies power to the circuit board through the isolation transformer, and the front end of the transformer is provided with a leakage protection switch.

Obviously, the invention has the characteristics of compact structure, small volume, low noise, high combustion efficiency, convenient manufacture and multipurpose application of the whole equipment through ingenious scientific design. Such as: the steam generator is used, and the volume of water in the whole box body is controlled within 30L, so that the device is not used as a pressure container and does not need to be brought into the management scope of pressure containers of boilers. The national standard can comply with the standard of a steam generator in the GB35848-2018 standard; secondly, the device can be conveniently combined with a rice steaming vehicle and a steaming cavity of a steaming cabinet, and the like, namely, the gas-type rice steaming vehicle, the gas-type steaming cabinet and the like with high efficiency and low noise are obtained. In practical use, the invention has ultrahigh combustion heat efficiency and ultralow waste heat emission. The combustion heat efficiency reaches 95 percent (under the condition of high calorific value), and the smoke discharge temperature of the smoke outlet is only about 60 ℃ under the general condition. Compared with the traditional equipment, the product of the invention not only has the advantage of very high energy saving, but also has the advantage of certain cost price, and the effect is very obvious.

Furthermore, as a mechanical air-air assembly of one embodiment of the present invention, the specific structure thereof is shown in fig. 5-6, when assembling, the present invention realizes accurate control of air-fuel ratio by performing bypass flow-dividing pressure relief on the air volume of the fan; the principle is that under the condition that the rotating speed and the air output of the fan are not changed, the theoretical air output Q is₀Required air quantity Q of burner₁+ bypass split air quantity Q₂. When in work: the fan is positioned at the front end of the invention so as to be communicated with the air inlet, and the burner is positioned at the rear end of the invention and is communicated with the air outlet. The gas regulating shaft 41 at the gas valve of the burner and the air regulating shaft 34 at the main air duct 30a are synchronously driven by a coaxial or chain wheel connection or an eccentric hinged connecting rod 35 in a hinged mode. The eccentric hinge connecting rod 35 and the small connecting rod are hinged in the same way as the radial rod 34b and the eccentric shaft 34 aa.

In fig. 7, the air passage is a and the air passage is B for illustration.

In practical operation, the fixed ends of the main duct 30a and the auxiliary shunt pressure relief pipes 30B of the present invention are fixed on the main duct 30 at the air path B and communicated with the tube cavity of the main duct 30, the pipe orifices of the cantilever ends of the two shunt pressure relief pipes are sealed by the sealing plate 31, and then the coaxial shunt baffle 32 is rotatably fitted on the sealing plate 31, and the shunt baffle 32 further depends on the air adjusting shaft 34 shown in fig. 5 to realize the rotation adjusting function, thereby realizing the purpose of complete shielding or partial shielding based on the air relief holes 31a at the sealing plate 31. The two groups of flow dividing baffles 32 at the main air duct 30a and the auxiliary flow dividing pressure relief duct 30b are connected through a connecting rod 36 or a meshing gear, as shown in detail with reference to fig. 6. For the splitter baffle 32, which is a flap structure with a fan-shaped flat surface mounted perpendicularly to the wind adjustment shaft 34, it is generally recommended that its area be not less than half of the entire area of the closure plate 31; in the process of rotation of the air adjusting shaft 34, the air adjusting shaft 34 will drive the diversion baffle 32 to rotate around the axis on the outer end face of the sealing plate 31, and when the area of the diversion baffle covering the air leakage hole 31a is small, the bypass air quantity Q is small₂Increase the required air quantity Q of the burner₁Decrease; otherwise, Q₂Decrease, Q₁And is increased. And the handle 4 is adjusted at the position passing through the air passage AThe ratio of the gas flow rate to the rotation angle of the air adjusting shaft 41 is changed during the rotation of the air adjusting shaft 41 controlled by 2, so that, in practical applications, the ratio of the air supply rate to the rotation angle of the air adjusting shaft 41 and thus the air adjusting shaft 34 is also changed in association with the optimal air-fuel ratio for the corresponding fire position.

Of course, in actual operation, even if the air-fuel ratio is appropriate, when both the gas supply amount and the air supply amount of the burner are small, it is very easy to be tempered. The maximum value of the gas input power range easy to backfire is defined as 'upper limit power for backfire', the opening degree of the gas valve corresponding to the corresponding adjusting handle 42 is 'backfire angle', and the backfire characteristics of the burners with different structural designs are different. Therefore, the invention can also realize that when the rotation angle of the adjusting handle 42 is larger than the tempering angle, the dial plate 37 triggers the position switch through the adjusting handle 42, the dial plate 37 synchronously rotating with the adjusting handle, the position switch is communicated with a main gas electromagnetic valve power supply communicated with a main gas pipeline, and thus, a main fire is turned on.

As another sensing type air/gas assembly, an embodiment structure thereof can be shown in fig. 8 to 16, and a main structure thereof includes two major components, namely, an air path module 10 and an air path module 20. Wherein: the gas circuit module 10 comprises a gas inlet circuit 11 communicated with a gas source, a main gas control module, a standby gas control module, a control switch 17, a one-way ball valve 18, a main fire regulating valve 19a, a normally open fire regulating valve 19b, a gas pressure stabilizing valve 19c and a throttle valve 19 d. The air path module 20 mainly includes a wind pressure sampling tube, a normally open fire air intake opening, i.e., an air inlet of the second parallel air path 22b, a front air door 25, and a damper 23 sequentially arranged from front to back.

For the duct module 20, the front damper 25 functions as a pre-adjustment and a rough adjustment, and the damper 23 directly realizes the precise air-air linkage adjustment on line, which are responsible for each of the first parallel ducts 22 a. The front air door 25 is constructed as shown in fig. 8-9, and the aim of visually regulating and controlling the opening and closing amplitude of the front air door 25 is fulfilled by observing the matching of the waist-shaped adjusting hole 25b at the plate 25a and the anchor column 25 c. The air inlet side of the front air door 25 is provided with a normally open fire air inlet, namely an air inlet of the second parallel air passage 22b, so that the action of the air door can not interfere with the normal operation of the normally open fire burner all the time. And a wind pressure sampling pipe is arranged in front of the normally open fire air intake so as to timely monitor the air outlet effect of the fan 21.

The damper 23 is one of the design core points of the present invention. The damper 23, as shown in fig. 7-9 and 14-16, includes a damper plate that is driven by a wind adjusting shaft to rotate. One end of the wind adjusting shaft penetrates through and extends out of one side wall of the first parallel wind path 22a to form a driving end; the other end of the wind adjusting shaft extends out of the other side wall of the first parallel wind path 22a in the opposite direction, and then is connected with a signal input shaft of the angle sensor 24 through a coupler. Thus, each time the air adjusting shaft rotates, the air adjusting shaft can drive the air door panel to generate a controllable adjusting function for the air intake of the first parallel air passage 22 a. Once the wind adjusting shaft rotates, the angle sensor 24 captures the rotation angle of the wind adjusting shaft, and then transmits a signal to the controller c shown in fig. 10, so that the controller c can control the main fire electromagnetic proportional valve 14b and the normally open fire electromagnetic proportional valve 14a to generate corresponding actions, and finally, an accurate control effect is achieved.

In practical use, the fan 21 is usually installed at a lower position, and the operation and the driving end of the fan 21 at the same height realize wind-air linkage, which is obviously not friendly to the waist damage or the elderly cooks. Therefore, the chain transmission structure shown in fig. 8-9 can be considered to be designed, so that the gear at the driving end is linked to the driving wheel at the higher position of the stove in a chain transmission manner, and the aim of quickly operating the air damper 23 and even the whole air-air linkage system can be conveniently achieved on the premise of not bending over. Furthermore, the angle sensor 24 should be covered with a protective casing to minimize or even avoid the influence of the complex working environment of the kitchen on the relatively fragile and sensitive angle sensor 24.

Further, as is apparent from fig. 13, the main gas control module and the standby gas control module are parallel electrical circuits. Namely, the first parallel branch gas path 16a is communicated with the main gas path 13 at the burner a through the main fire electromagnetic switch valve 15b, and the second parallel branch gas path 16b is communicated with the normally open fire gas path 12 at the normally open fire burner b through the normally open fire electromagnetic switch valve 15 a; the third parallel branch gas passage 16c communicates with the normally open flame gas passage 12 at the normally open flame burner b via the normally open flame electromagnetic proportional valve 14a, and the fourth parallel branch gas passage 16d communicates with the main gas passage 13 at the burner a via the main flame electromagnetic proportional valve 14 b.

In actual use, because the main gas control module and the standby gas control module both adopt an electrically controllable solenoid valve structure, they can be controlled by an ignition controller, i.e., a controller c, and their operating states form a logical or relationship with each other, and are switched by a three-position power switch, i.e., a control switch 17, as shown in fig. 10. The control switch 17 has three operation states of a stop mode, an operation mode, and a standby mode. Under the operating mode, main gas control module group intercommunication electric circuit is in operating condition, thereby the electric circuit of reserve gas control module group is not communicated and is in the stop condition. Under the standby mode, the main gas control module is not communicated with the electric circuit and is in a stop state, and the standby gas control module is communicated with the electric circuit and is in a working state. Under the stop mode, reserve gas control module group, main gas control module group all are in the stall state, and the machine is out of work. The standby gas control module can only provide the on-off function of gas, the on-off time is usually millisecond level, and the main fire electromagnetic proportional valve of the main gas control module can accurately control the opening and closing drift diameter and the required time of main gas. The standby gas control module plays a standby control role in the system, and under the standby mode, the normal open fire and the main fire can still normally operate, so that the practicability of the product is greatly improved, and the gas control system can be used in harsh working occasions with short fault clearing time of a gas control part of a stove.

In the case of the check ball valve 18, which is vertically installed at the outlet side of the main gas control module as shown in fig. 10 to 13, the purpose of the vertical installation is to allow the ball inside the check ball valve 18 to be pressed down at the inlet valve of the check ball valve 18 by its own weight. The check ball valve 18 is in an open state in the direction of the gas flow path and in a closed state. When the main fire electromagnetic proportional valve 14b or the main fire electromagnetic switch valve 15b is instantly opened to enable the gas to be directly communicated with the combustor a, or when the main gas path 13 has a long-handle gas ball valve, the main fire electromagnetic proportional valve 14b or the main fire electromagnetic switch valve 15b is opened in advance, so that when the gas is directly communicated with the combustor a, the long-handle gas ball valve at the main gas path 13 is instantly opened and communicated with the combustor a, the one-way ball valve 18 is vertically installed, when the gas passes through the one-way ball valve 18, the valve core inside can delay the opening speed and the opening angle under the action of self weight, and therefore the effect of preventing the pressure in the main gas path 13 shared by normal open fire and main fire from suddenly dropping is achieved, and the air inlet pressure is ensured. Of course, the check ball valve 18 may be replaced by a check damper valve, because the function of delaying the gas due to the momentary impact may be ensured by an elastic member such as a compression spring in the check damper valve without setting the valve in a vertical state, and therefore, the valve may be installed in a vertical state without limitation.

In actual use, as a further preferable scheme, various sensors can be arranged at each manual air intake adjusting part of the combustor a and the normally open flame combustor b, and a controller c and a control program are matched with the sensors. For the main fire, the sensor can sensitively sense the operation action of the cook on the main fire, and the set program is combined, the opening and closing speed of the main gas can be delayed through the program of the controller c, so that the functional defect that the normally open fire is easy to extinguish due to the instant opening and closing of the main fire is overcome from the angle of electrical control, and the normally open fire is protected from the influence of the opening and closing of the main gas together with the mechanical damping action of the one-way ball valve 18. For the normal open fire, the sensor can sharply judge whether the air supply amount of the normal open fire is proper or not according to the strength of the signal of the normal open fire ion probe, and make corresponding signal prompt, and judge the service life and the adverse trend of the ion probe according to the strength of the best measurable electric signal, so as to prompt a user to timely maintain and replace the ion probe and eliminate potential faults, thereby ensuring the long-term stable work of the machine. Even the burner a can be matched with a flame ion probe and a controller c and an ion probe sampling judgment and control program, whether the main fire air supply quantity is proper or not can be sharply judged according to the strength of the main fire ion probe signal, corresponding signal reminding is made, and a user is reminded to properly adjust the opening degree of the main air valve and combine the actual main fire flame combustion condition, so that the main fire is in the optimal combustion state. Meanwhile, the flame ion probe can also be arranged on a normally open flame burner b, and the purpose is to match a controller c and an ion probe sampling judgment and control program to judge whether the main flame air supply quantity is proper or not according to the strength of the main flame ion probe signal, and adjust the opening and closing of the corresponding main gas control module according to the program instruction of the controller c under the specific main flame power, so that the automatic closing and accurate negative feedback control of the main flame is realized.

In actual operation, the air door handle for controlling the rotation of the air adjusting shaft shown in fig. 8-9 corresponds to different air volume supply positions, so that the air door handle is positioned at any corresponding position in the corresponding fire power range, and the excitation voltage of the corresponding electromagnetic proportional valve can be adjusted through the voltage output at the controller c, and finally the optimal air-fuel ratio matching value is achieved. Therefore, the mapping relation between the angle value of the position point of the air door handle and the excitation voltage value of the corresponding electromagnetic proportional valve needs to be obtained, and an angle-voltage mapping curve can be obtained through an experimental point tracing method; the single chip microcomputer records the curve and executes the curve in application, and accurate air-fuel ratio adjustment open-loop control can be achieved. After the stove equipment is designed and shaped, the overall gas resistance, the conduction capability and the air resistance and the conduction capability of a wind path are fixed; therefore, as long as the pressure of the fuel gas input into the equipment is kept constant by the fuel gas pressure stabilizing valve, the air-fuel ratio curve corresponding to any fuel gas with any heat value can be determined by an angle-voltage mapping curve; the specific working logic is as follows: firstly, electrifying equipment, starting a fan and pre-purging a hearth; secondly, the ignition controller ignites normally-the high level at the position of the angle sensor 24 is uploaded to the controller c-the system is in a standby state; thirdly, when the air door handle is pulled to a certain position, the angle sensor 24 uploads the angle value to the singlechip serving as the controller c. The single chip microcomputer outputs corresponding excitation voltage to the corresponding electromagnetic proportional valve according to a corresponding curve/numerical value mapping table of angle-voltage prestored, so that the corresponding opening degree of the gas valve is kept according to the excitation voltage; therefore, the aim of accurately adjusting and controlling the air-fuel ratio of the stove in the full-firepower application range can be fulfilled.

It will, of course, be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.