CN220249977U - Biomass gasification combustion furnace - Google Patents

Abstract

The utility model discloses a biomass gasification combustion furnace, which comprises a furnace seat, a furnace body and a fire grate, wherein the furnace seat is in a groove shape, the furnace body is arranged above the furnace seat and is in butt joint with the upper end of the furnace seat, the fire grate is arranged at the butt joint position of the furnace seat and the furnace body, the furnace body and the fire grate enclose to form a combustion chamber, the fire grate and the furnace seat enclose to form an ash receiving chamber, an ash removing opening and an ash removing door are arranged on the side wall of the furnace seat, the upper end of the furnace body is closed to form a feeding opening, an outlet pipe communicated with the combustion chamber is arranged in the middle of the side wall of the furnace body, the furnace wall of the furnace body is in an interlayer cavity structure, an air inlet communicated with the interlayer cavity structure is arranged at the position, close to the feeding opening, of the upper end of the furnace body is provided with a primary air outlet communicated with the interlayer cavity structure and the ash receiving chamber, a secondary air interface communicated with the inside the interlayer cavity structure is arranged at the position, corresponding to the lower part of the fire outlet pipe, and the furnace body is simple in structure, long in service life and small in heat loss.

Description

Biomass gasification combustion furnace

Technical Field

The utility model belongs to the field of combustion furnaces, and particularly relates to a biomass gasification combustion furnace.

Background

Biomass particles are well known and widely applied in terms of use convenience and fuel economy, a biomass gasification burner is simple in structure and low in cost, a fire outlet of a combustion chamber of the biomass gasification burner can extend into equipment for combustion, the existing burner is easy to deform and damage due to high combustion environment temperature, the service life is short, and the burner is easy to produce coking in combustion due to the working characteristics of the burner, so that the fuel requirement is high, the fuel cost is improved intangibly, and the performance of the burner is superior to that of the burner. In order to prevent heat loss of a combustion chamber, the existing combustion furnace is wrapped by adopting heat-insulating materials such as rock wool, but the temperature of the furnace body is too high to shorten the service life or cause faults such as deformation and cracking.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a biomass gasification combustion furnace, wherein the inner wall of the furnace wall is of a sandwich cavity structure, primary air and secondary air are introduced into the sandwich cavity structure for preheating, and the furnace body is cooled so as not to be provided with an insulating layer.

In order to achieve the above object, the technical scheme of the present utility model is as follows: the utility model provides a living beings gasification fires burning furnace, includes stove seat, furnace body and grate, the stove seat is cell body shape and its notch up, the furnace body sets up the top of stove seat, just the lower extreme of furnace body is uncovered, and with the upper end butt joint of stove seat, and the two butt joint department is provided with the grate, the furnace body with the grate encloses and closes and form the combustion chamber, the grate with the stove seat encloses and closes and form the ash chamber, be provided with the deashing mouth on the lateral wall of stove seat, just ash removal mouth department is provided with the ash removal door, the upper end of furnace body is loudspeaker-shaped binding off in order to constitute the feed inlet, the middle part of furnace body lateral wall be equipped with the play firetube of intercommunication in the combustion chamber, the furnace body is the intermediate layer cavity structure, the furnace body upper end be close to the feed inlet department be provided with the air intake of intercommunication in the intermediate layer cavity structure, the lower extreme of furnace body is provided with the intermediate layer cavity structure with the air outlet of receiving the ash chamber intercommunication, and the primary air outlet of air chamber, just be provided with the ash chamber on the lateral wall is provided with the air outlet mouth of air duct, the secondary air duct is provided with down the intermediate layer cavity structure and the secondary air duct down.

The beneficial effects of the technical scheme are that: through setting up the oven of furnace body into the intermediate layer cavity structure, air is blown into to the intermediate layer cavity structure through the air intake so, the air of drum income in the intermediate layer cavity structure can absorb the heat of furnace body oven and cool down the furnace body so and make the furnace body need not to set up the heat preservation and carry out heat preservation processing to the furnace body, hot air after absorbing the heat in the intermediate layer cavity structure is as a part in the stove seat through the primary air export, and from bottom to top goes up to the combustion chamber because the grate has biomass fuel on, the primary air helps biomass fuel slow oxidation and gasification to combustible gas this moment, combustible gas and primary air go up to the combustion chamber top and burn and appear open flame, and the flame is derived through the firetube, and the overgrate air of firetube department can further help burning combustible gas fully burns.

Still include the feeding auger among the above-mentioned technical scheme, the feed end slope of feeding auger is down, and its feed inlet is up, the discharge gate of feeding auger is down and is provided with first flange ring, the upper end of dog-house is provided with the second flange ring, first flange ring and second flange ring bolt are in order to with the feeding auger is installed the furnace body upper end, the feeding auger be used for to send into biomass pellet fuel in the furnace body.

The beneficial effects of the technical scheme are that: so can be by the feeding auger will the dog-house is plugged up, and send into biomass fuel in the furnace body by the feeding auger, its convenient to use, and set up the feeding auger slope downwards can avoid the biomass fuel in the feeding auger to be led to fire and lead to the burning bin as far as possible.

In the technical scheme, the downward inclination angle of the feeding auger is 40-60 degrees.

The beneficial effects of the technical scheme are that: the biomass fuel feeding device is favorable for feeding biomass fuel into the feeding port of the feeding auger, and in addition, the biomass fuel in the feeding auger is prevented from being ignited.

In the above technical scheme, a plurality of tertiary air outlets communicated with the interlayer cavity structure are further formed in the inner wall of the feed port, and the tertiary air outlets are used for feeding air to the feed port.

The beneficial effects of the technical scheme are that: the air temperature at the feeding port is close to the room temperature because the feeding port is closest to the air inlet, the air fed to the feeding port from the tertiary air outlet firstly can cool the biomass fuel at the feeding port, and in addition, the combustible gas with lighter density such as carbon monoxide enriched at the feeding port in the furnace body can be purged downwards to be fully combusted in the combustion chamber, so that the combustible gas is prevented from leaking out through the feeding port.

In the above technical scheme, the middle part of the side wall of the furnace body is also provided with a firewood throwing port communicated with the combustion chamber, and the firewood throwing port is provided with an opening and closing door.

The beneficial effects of the technical scheme are that: so that the biomass gasification combustion furnace can also directly use straw or firewood for combustion, and has better adaptability.

According to the technical scheme, the fire outlet pipe is outwards in a horn-shaped closing-in mode, an annular cavity is formed in the pipe wall of the fire outlet pipe, the upper end of the air pipe is communicated with the annular cavity, and a plurality of secondary air outlets communicated with the annular cavity are formed in the inner wall of the fire outlet pipe.

The beneficial effects of the technical scheme are that: the device has a simple structure, and can enable the combustible gas to burn more fully in the fire outlet pipe, and has higher fuel utilization effect.

In the above technical scheme, a plurality of guide plates are arranged on the inner wall of the fire outlet pipe at intervals in the circumferential direction, and a plurality of guide plates are arranged along the length direction of the fire outlet pipe, and a secondary air outlet is arranged between every two adjacent guide plates.

The beneficial effects of the technical scheme are that: therefore, the flame can be prevented from generating vortex, so that the flame can be better in linear injection effect along the flame outlet pipe, and the combustion is more sufficient.

According to the technical scheme, the inner side of the furnace body protrudes out of the inner side of the furnace seat, one side, close to each other, of the furnace body and the furnace seat is annular, the furnace body and the furnace seat are in coaxial butt joint, and the primary air outlet is arranged at the position, protruding out of the furnace seat, of the lower end of the furnace body.

The beneficial effects of the technical scheme are that: the structure is simple.

In the above technical scheme, the primary air regulating valve comprises a circular ring-shaped movable plate, the primary air outlets are provided with a plurality of arc-shaped holes, the primary air outlets are uniformly arranged at annular intervals, the lower end of the furnace body protrudes out of the position in the furnace seat, the primary air outlets are coaxially distributed with the lower end of the furnace body, the movable plate is coaxially rotatably arranged at the lower end of the furnace body, a plurality of valve holes which penetrate up and down and are arc-shaped are arranged at annular intervals on the movable plate, the valve holes are coaxially distributed with the movable plate, the primary air outlets are in one-to-one correspondence with the valve holes, and the movable plate is rotated to each valve hole and the corresponding primary air outlet are aligned or misplaced so as to regulate the air outlet quantity of primary air.

The beneficial effects of the technical scheme are that: the structure is simple, and the air quantity of primary air is more convenient to adjust.

In the above technical scheme, the primary air regulating valve further comprises a handle rod, the handle rod is vertically arranged in the furnace seat and is close to the ash removing opening, the upper end of the handle rod is fixedly connected with one end of the corresponding valve hole and penetrates into the corresponding primary air outlet, and the handle rod is shifted to drive the movable plate to rotate along the corresponding primary air outlet so as to regulate and regulate the primary air outlet quantity.

The beneficial effects of the technical scheme are that: the structure is simple, and the air quantity of primary air can be directly regulated at the position close to the ash cleaning opening in the furnace seat through the handle rod.

Drawings

FIG. 1 is a cross-sectional view of a biomass gasification burner according to an embodiment of the utility model;

FIG. 2 is an enlarged view at B in FIG. 1;

FIG. 3 is an enlarged view of FIG. 1 at A;

FIG. 4 is an external view of a biomass gasification burner according to an embodiment of the utility model;

FIG. 5 is an end view of the fire tube according to the embodiment of the present utility model;

FIG. 6 is a bottom view of the junction of the furnace base and the furnace body according to an embodiment of the present utility model;

FIG. 7 is a top view of the movable plate according to the embodiment of the present utility model;

FIG. 8 is a state diagram of the primary air outlet with maximum opening in the embodiment of the present utility model;

FIG. 9 is a state diagram of the primary air outlet with minimum opening in the embodiment of the present utility model;

fig. 10 is a schematic structural view of a feeding auger according to an embodiment of the present utility model.

In the figure: 1 furnace seat, 11 ash removal mouth, 12 ash removal door, 2 furnace body, 21 feed inlet, 211 second flange ring, 22 air intake, 23 primary air outlet, 24 secondary air interface, 25 tuber pipe, 26 tertiary air outlet, 27 intermediate layer cavity structure, 28 open and close door, 29 firewood mouth, 3 grate, 4 fire tube, 41 secondary air outlet, 42 guide plate, 43 annular cavity, 5 primary air regulating valve, 51 fly leaf, 511 valve hole, 52 handle bar, 6 secondary air regulating valve, 7 feeding auger, 71 first flange ring, 72 inspection lid.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model. The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

As shown in fig. 1-4, this embodiment provides a biomass gasification combustion furnace, which comprises a furnace seat 1, a furnace body 2 and a fire grate 3, wherein the furnace seat 1 is in a tank shape and has an upward notch, the furnace body 2 is arranged above the furnace seat 1, and the lower end of the furnace body 2 is open and is in butt joint with the upper end of the furnace seat 1 (the butt joint mode can be welding or flange ring connection, which belongs to the prior art, so that the butt joint is not repeated), the fire grate 3 is arranged at the butt joint position of the furnace body 2 and the fire grate 3 enclose to form a combustion chamber, the fire grate 3 and the furnace seat 1 enclose to form an ash receiving chamber, the side wall of the furnace seat 1 is provided with an ash removing opening 11, the ash removing opening 11 is provided with an ash removing door 12, the upper end of the furnace body 2 is in a horn shape to form a material throwing opening 21, the middle part of the side wall of the furnace body 2 is provided with an air outlet pipe 4 communicated with the combustion chamber, the furnace wall of the furnace body 2 is in a sandwich cavity structure 27, the upper end of the furnace body 2 is close to the air inlet 2 is provided with an air inlet opening 25, the air inlet 24 is communicated with the air outlet 24 of the air inlet 2, the air outlet 25 is communicated with the air outlet 25 of the air inlet 2 by the air inlet 25, the air outlet 25 is communicated with the air outlet 25 of the air inlet 2, the air outlet 25 is communicated with the air outlet 25 is arranged at the air inlet 25, and the air outlet 25 is communicated with the air outlet 2 is communicated with the air outlet 25, through setting up the oven of furnace body into intermediate layer cavity structure 27, so accessible air intake is to the air-blast in the intermediate layer cavity structure 27, the air of the interior drum of intermediate layer cavity structure 27 can absorb the heat of furnace body oven and cool down the furnace body so and make the furnace body need not to set up the heat preservation and carry out heat preservation treatment, hot air after the heat absorption in the intermediate layer cavity structure 27 is as a part in the stove seat through the primary air export, and from bottom to top goes up to the combustion chamber because the grate is piled up to have biomass fuel, the primary air helps biomass fuel slow oxidation and gasifies into combustible gas this moment, combustible gas and primary air go up to the combustion chamber top and burn and appear open flame, and the flame is derived through the firetube, and the overgrate air of firetube department can further help burning combustible gas fully burns. The grate is a grating plate which is arranged at the lower end in the furnace body.

The technical scheme includes that the furnace further comprises a feeding auger 7, the feeding end of the feeding auger 7 is inclined downwards, the feeding inlet of the feeding auger is upward, the discharging outlet of the feeding auger 7 is downward and is provided with a first flange ring 71, the upper end of the feeding port 21 is provided with a second flange ring 211, the first flange ring 71 and the second flange ring 211 are bolted so as to mount the feeding auger 7 at the upper end of the furnace body 2, the feeding auger 7 is used for feeding biomass granular fuel into the furnace body 2, the feeding port can be blocked by the feeding auger, and the biomass fuel is fed into the furnace body by the feeding auger, the furnace is convenient to use, and the feeding auger is inclined downwards so as to avoid the biomass fuel in the feeding auger from being ignited to cause a combustion bin.

In the above technical scheme, the downward inclination angle of the feeding auger 7 is 40-60 degrees, which is helpful for feeding biomass fuel to the feeding port of the feeding auger (the feeding port of the feeding auger is low in height and convenient for feeding), and in addition, the effect of preventing the biomass fuel in the feeding auger from being ignited is better.

In the above technical scheme, a plurality of tertiary air outlets 26 communicated with the interlayer cavity structure 27 are further arranged on the inner wall of the feed port 21, the tertiary air outlets 26 are used for supplying air to the feed port 21, the air temperature at the feed port is close to the room temperature because the feed port is closest to the air inlet, the tertiary air outlets feed air to the feed port to cool the biomass fuel at the feed port, and in addition, the biomass fuel at the feed port can be purged downwards to fully burn in the combustion chamber due to the fact that the carbon monoxide and other low-density combustible gases enriched in the feed port in the furnace body are fully burnt, and the combustible gases are prevented from leaking out through the feed port.

In the above technical scheme, the middle part of the side wall of the furnace body 2 is also provided with a firewood throwing port 29 communicated with the combustion chamber, and the firewood throwing port 29 is provided with an opening and closing door 28, so that the biomass gasification combustion furnace can also directly use straw or firewood for combustion, and has better adaptability.

In the above technical scheme, the fire outlet pipe 4 is outwards in a horn-shaped closing-in manner, and the inside of the pipe wall of the fire outlet pipe 4 is provided with an annular cavity 43, the upper end of the air pipe 25 is communicated with the annular cavity 43, and the inner wall of the fire outlet pipe 4 is provided with a plurality of secondary air outlets 41 communicated with the annular cavity 43.

As shown in fig. 5, in the above technical solution, a plurality of guide plates 42 are circumferentially arranged on the inner wall of the fire tube 4 at intervals, and a plurality of guide plates 42 are all arranged along the length direction of the fire tube 4, and two secondary air outlets 41 are arranged between two adjacent guide plates 42, so that the flame can be prevented from generating vortex, so that the flame has better linear injection effect along the fire tube, and the combustion is more sufficient.

As shown in fig. 6-9, in the above technical solution, the inner side of the furnace body 2 protrudes from the inner side of the furnace seat 1, the side of the furnace body 2 and the side of the furnace seat 1, which are close to each other, are both circular, and are coaxially butted, and the primary air outlet 23 is disposed at a position where the lower end of the furnace body 2 protrudes from the furnace seat 1, so that the structure is simple.

In the above technical scheme, the primary air regulating valve 5 includes a circular ring-shaped movable plate 51, the primary air outlet 23 is provided with a plurality of arc-shaped holes, a plurality of the primary air outlets 23 are uniformly arranged at annular intervals at positions where the lower end of the furnace body 2 protrudes out of the furnace seat 1, and the primary air outlets 23 and the lower end of the furnace body 2 are coaxially distributed, the movable plate 51 is coaxially rotatably arranged at the lower end of the furnace body 2, a plurality of valve holes 511 penetrating up and down and being arc-shaped are formed in the movable plate 51 at annular intervals, the valve holes 511 and the movable plate 51 are coaxially distributed, a plurality of the primary air outlets 23 are in one-to-one correspondence with the valve holes 511, the movable plate 51 is rotated to align or dislocate with the corresponding primary air outlets 23 so as to regulate the air outlet of primary air, the structure is simple, and the air quantity regulation of the primary air is more convenient.

In the above technical solution, the primary air adjusting valve 5 further includes a handle rod 52, where the handle rod 52 is vertically disposed in the furnace seat 1 and is close to the ash removing opening 11, the upper end of the handle rod 52 is fixedly connected with one end of the valve hole 511 corresponding to the position and penetrates into the primary air outlet 23 corresponding to the position, and the handle rod 52 is stirred to drive the movable plate 51 to rotate along the corresponding primary air outlet 23 to adjust the primary air outlet.

The arc diameters and the arc core angles of the primary air outlet and the valve holes are consistent, and the corresponding arc core angle at the interval between two adjacent valve holes is larger than the arc core angle of the valve hole, so that when the primary air outlet is opened to be minimum, the valve holes are aligned with the side primary air outlets.

In this embodiment, except the air introduced from the air inlet is discharged into the furnace body through the three air outlets, the rest flows from top to bottom along the interlayer cavity structure, and the whole heat in the furnace body flows from bottom to top, so that the air or the heat forms convection, and the air can sufficiently take away the heat of the furnace wall (so that the temperature of the furnace wall of the furnace body is not very high when the biomass fuel in the furnace body is combusted, the heat loss of the furnace wall is also relatively low under the precondition that the heat insulation layer is not arranged on the side wall of the furnace body, and the furnace wall is always at a relatively low temperature, so that the service life is long).

Preferably, as shown in fig. 10, the discharge hole of the feeding auger is vertically downward, and the opening of the discharge hole is provided with an inspection cover 72, the inspection cover can be opened to directly downward pass through the discharge hole and the feeding hole of the feeding auger to view the situation in the furnace body, the inspection cover can be a slot cover, the inner side wall of the inspection cover is provided with an inner thread, the opening of the upper end of the feeding auger is provided with an outer thread, and the inspection cover can be installed at the upper end of the discharge hole of the feeding auger in a threaded manner.

The inner diameter of the movable plate is equal to the inner diameter of the lower end of the furnace body, and the outer diameter of the movable plate is slightly smaller than the inner diameter of the notch of the furnace seat (the difference value can be 1-5 mm).

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way; those skilled in the art will readily appreciate that the present utility model may be implemented as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present utility model are possible in light of the above teachings without departing from the scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the present utility model.

Claims (10)

1. The utility model provides a biomass gasification combustion furnace, its characterized in that, including stove seat (1), furnace body (2) and grate (3), stove seat (1) is cell body shape and its notch up, furnace body (2) set up the top of stove seat (1), just the lower extreme of furnace body (2) is uncovered, and with the upper end butt joint of stove seat (1), and the two butt joint department is provided with grate (3), furnace body (2) with grate (3) enclose and close and form the combustion chamber, grate (3) with stove seat (1) enclose and close and form and connect the ash chamber, be provided with ash removal mouth (11) on the lateral wall of stove seat (1), just ash removal mouth (11) are provided with ash removal door (12), the upper end of furnace body (2) is the horn-shaped binding off in order to constitute feed through (21), the middle part of furnace body (2) lateral wall be equipped with in the combustion chamber intercommunication's air outlet (4), the furnace body (2) the oven is intermediate layer cavity structure (27), upper end (2) with the intermediate layer structure (27) are close to form and connect ash removal mouth (27) with air intake (27) and air intake (23) are used for connecting in the intermediate layer structure (22) and are provided with air intake (23), and primary air outlet (23) department is provided with primary air governing valve (5), furnace body (2) lateral wall's lower extreme corresponds the below department of play firetube (4) be provided with overgrate air interface (24) of the inside intercommunication of intermediate layer cavity structure (27), overgrate air interface (24) are through setting up tuber pipe (25) on furnace body (2) outer wall to go out firetube (4) department and let in overgrate air, just be provided with overgrate air governing valve (6) on tuber pipe (25).

2. The biomass gasification combustion furnace according to claim 1, further comprising a feeding auger (7), wherein a feeding end of the feeding auger (7) is inclined downwards, a feeding inlet of the feeding auger is upward, a discharging outlet of the feeding auger (7) is downward and is provided with a first flange ring (71), an upper end of the feeding inlet (21) is provided with a second flange ring (211), the first flange ring (71) and the second flange ring (211) are bolted to install the feeding auger (7) at an upper end of the furnace body (2), and the feeding auger (7) is used for feeding biomass pellet fuel into the furnace body (2).

3. A biomass gasification burner according to claim 2, wherein said feed auger (7) is inclined downwardly at an angle of 40-60 °.

4. The biomass gasification combustion furnace according to claim 1, wherein a plurality of tertiary air outlets (26) communicated with the inside of the interlayer cavity structure (27) are further arranged on the inner wall of the feeding hole (21), and the tertiary air outlets (26) are used for feeding air into the feeding hole (21).

5. The biomass gasification combustion furnace according to claim 1, wherein a firewood throwing port (29) communicated with the combustion chamber is further arranged in the middle of the side wall of the furnace body (2), and an opening and closing door (28) is arranged at the firewood throwing port (29).

6. The biomass gasification combustion furnace according to claim 1, wherein the fire outlet pipe (4) is outwards in a horn shape, an annular cavity (43) is formed in the pipe wall of the fire outlet pipe (4), the upper end of the air pipe (25) is communicated with the annular cavity (43), and a plurality of secondary air outlets (41) communicated with the annular cavity (43) are formed in the inner wall of the fire outlet pipe (4).

7. The biomass gasification combustion furnace according to claim 6, wherein a plurality of guide plates (42) are circumferentially arranged on the inner wall of the fire outlet pipe (4) at intervals, the guide plates (42) are all arranged along the length direction of the fire outlet pipe (4), and the secondary air outlet (41) is arranged between two adjacent guide plates (42).

8. The biomass gasification combustion furnace according to claim 1, wherein the inner side of the furnace body (2) protrudes from the inner side of the furnace seat (1), the side, close to each other, of the furnace body (2) and the furnace seat (1) is annular, the furnace body and the furnace seat (1) are coaxially butted, and the primary air outlet (23) is arranged at a position, protruding from the inner side of the furnace seat (1), of the lower end of the furnace body (2).

9. The biomass gasification combustion furnace according to claim 8, wherein the primary air regulating valve (5) comprises a circular movable plate (51), the primary air outlets (23) are provided with a plurality of arc-shaped holes, the primary air outlets (23) are uniformly arranged at positions, protruding out of the furnace seat (1), of the lower end of the furnace body (2), the primary air outlets (23) and the lower end of the furnace body (2) are coaxially distributed, the movable plate (51) is coaxially rotatably arranged at the lower end of the furnace body (2), a plurality of valve holes (511) penetrating up and down and being arc-shaped are formed in the movable plate (51) at intervals in an annular mode, the valve holes (511) and the movable plate (51) are coaxially distributed, the primary air outlets (23) and the valve holes (511) are in one-to-one correspondence, and the movable plate (51) is rotated to each valve hole (511) and the corresponding primary air outlet (23) are aligned or the air outlet quantity of the primary air is misplaced.

10. The biomass gasification combustion furnace according to claim 9, wherein the primary air regulating valve (5) further comprises a handle rod (52), the handle rod (52) is vertically arranged in the furnace seat (1) and is close to the ash cleaning opening (11), the upper end of the handle rod (52) is fixedly connected with one end of the valve hole (511) at the corresponding position and penetrates into the primary air outlet (23) at the corresponding position, and the handle rod (52) is shifted to drive the movable plate (51) to rotate along the corresponding primary air outlet (23) so as to regulate and regulate the primary air output.