CN108457881A - Smoke eliminator and its double turbofans - Google Patents

Abstract

The present invention discloses smoke eliminator and its double turbofans, double turbofans, including spiral case and two counter-rotational centrifugal impellers under motor driving.Smoke eliminator, including smoke eliminator ontology and exhaust pipe, fixed seat for fixing smoke eliminator ontology, smoke eliminator ontology include shell and the wind turbine that is arranged in shell, and the wind turbine is double turbofans.Two centrifugal impeller synchronous backward rotations in double turbofans of the present invention can effective increasing exhaust amount by two duct exhaust airs.

Description

Smoke eliminator and its twin-turbine fan

technical field

The invention relates to the field of air purification equipment, in particular to a smoke eliminator and a double-turbine blower used in a chess and card room.

Background technique

In the chess and card room, there are generally several fully automatic mahjong machines arranged. In order to meet the light requirements of the users of the fully automatic mahjong machines, lighting equipment such as chandeliers or dome lights is preferably provided above each mahjong machine. At the same time, considering the use environment in the chess and card room, it is necessary to install smoke exhaust and dust removal equipment directly above each mahjong machine. Existing lighting equipment and smoke and dust removal equipment exist as independent products.

The patent document with the publication number CN206637447U discloses a chandelier with air extraction and exhaust function, including a lampshade, a duct fan, a boom and an exhaust pipe. There is an air passage connected between the air inlet and the upper opening. Duct fan, whose air inlet end communicates with the upper opening; the boom, whose interior is hollow for air to pass through, and whose lower end communicates with the wind end of the duct fan; and an exhaust pipe, whose one end is connected to the boom The upper end is connected, and the other end is connected to the outside.

The above-mentioned chandelier with air extraction and exhaust function is integrated with lighting function and smoke exhaust and dust removal function, but because its purpose is to eliminate harmful gases (benzene, toluene, formaldehyde, etc.) generated by interior decoration, the concentration of these gases in the room is relatively high Small, so the requirements for the exhaust air volume of the chandelier are small. The environment in the chess and card room requires that the fan in the smoke eliminator be a large-displacement fan. In this way, on the one hand, it is necessary to increase the air intake and air output inside and outside the smoke eliminator shell. On the other hand, the volume and volume of the large-displacement fan The increase in weight has high requirements on the strength of the hoisting structure. And the public number is the chandelier disclosed in the document of CN206637447U, due to the limitation of its place of use and function, the volume of chandelier can also realize its function less, if it is used under the chandelier of large volume and heavy weight, on the one hand, its hoisting strength It cannot be guaranteed. On the other hand, the expansion and contraction of the boom is controlled by the motor, which requires high power and high cost of the motor.

Therefore, it is necessary to provide an all-in-one device that integrates lighting functions and smoke exhaust and dust removal functions and is especially suitable for chess and card rooms.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a double-turbine fan for a smoke eliminator with good smoke exhaust effect and a smoke eliminator with the fan.

In order to achieve the above object, the present invention adopts the following technical solutions:

A twin-turbine blower for a smoke eliminator, including a volute (21) and two centrifugal impellers (22) that rotate in opposite directions driven by a motor. The volute (21) includes two half-shells that are symmetrical front and back and fixed as one , each half shell includes a panel (211) and a side panel (212) for forming two left-right symmetrical air ducts, the side panel (212) is provided with a gap for forming an air outlet, and the panel corresponds to two air ducts There are two air inlets (213), and the two air ducts are separated by a partition A (214); after the two half-shells are fixedly connected, the side plates (212) on the two half-shells are matched with the volute ( 21) A complete air duct is formed on the top, and the gaps on the two side plates form a complete air outlet. The air duct shares one air outlet; two centrifugal impellers (22) which rotate oppositely under the drive of the motor are arranged and installed in the volute (21) left and right, and the blades of the two centrifugal impellers (22) are respectively facing the two blades in the volute. Air duct (215) is set.

As an optimal technical solution, a connection edge (216) is respectively provided at the joint of the two half shells, and screw holes are provided on the connection edge (216), and the two half shells are connected by bolts; at the joint of the two half shells and the two The joints of the two partitions A (214) are provided with grooves and protrusions that cooperate with each other.

As a preferred technical solution, protective nets are formed at the two air inlets on the volute (21).

The smoke eliminator includes a smoke eliminator body, an exhaust pipe (4) for fixing the smoke eliminator body, and a fixing seat (5). The smoke eliminator body includes a casing (1) and a fan (2) arranged in the casing ), the fan is the twin-turbine fan described in any one of claims 1-3.

As a preferred technical solution, the air outlet of the fan (2) is provided with an exhaust fairing (6), and the exhaust fairing (6) has a reduced transition from its air inlet to its air outlet; the exhaust rectification A partition B (61) is arranged corresponding to the partition A (214) in the cover (6).

As a preferred technical solution, the housing (1) includes an upper housing (11) and a lower housing (12), the overall width of the upper housing (11) is greater than the overall width of the lower housing (12), and a There are a first-stage air inlet (121), a second-stage air inlet (122) and a third-stage air inlet (113). The third-stage air inlet connects the outside of the casing with the fan installation cavity, and the third-stage air inlet Up and down dislocation and internal and external dislocation; the inner cavity of the upper shell (11) and the inner cavity of the lower shell (12) jointly form a fan installation cavity.

As a preferred technical solution, the other end of the exhaust pipe (4) communicates with the waste gas treatment device, and the waste gas treatment device includes air extraction equipment and purification equipment.

In the above-mentioned twin-turbine blower used for the smoke eliminator, the air sucked from the air inlet passes through the action of the centrifugal impeller and then enters the air duct in a direction changed, and moves along the air duct at high speed to be discharged from the air outlet. The two centrifugal impellers rotate in opposite directions synchronously, and the air is exhausted through two air ducts, which can effectively increase the exhaust air volume.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a structural schematic view of another angle of the embodiment of the present invention (hidden cover).

Fig. 3 is a schematic structural diagram of the upper casing.

Fig. 4 is a structural schematic diagram of another angle of the upper casing.

Fig. 5 is a structural schematic diagram of the lower casing.

Fig. 6 is a structural schematic diagram of another angle of the lower shell.

Fig. 7 is a schematic structural diagram of the second lighting assembly.

Figure 8 is a schematic structural view of the exhaust fairing.

Fig. 9 is a structural schematic diagram of the locking device.

Fig. 10 is a schematic structural diagram of a twin-turbine fan.

FIG. 11 is a schematic cross-sectional structure diagram of FIG. 10 .

1. Housing, 11. Upper housing, 111. Peripheral injection molded parts, 1111. Mounting groove, 1112. First connection part, 1113. Second connection part, 1114. Air vent, 112. Metal plate part, 1121. Opening connected to the air outlet of the fan, 113, the third air inlet, 12, the lower shell, 121, the first air inlet, 122, the second air inlet, 13, the cover plate, 2, the fan, 21, the worm Shell, 211, panel, 212, side plate, 213, air inlet, 214, partition A, 215, air duct, 216, connecting edge, 22, centrifugal impeller, 3, lighting assembly, 31, first-stage lighting assembly, 32. Second-level lighting assembly, 4. Exhaust pipe, 41. Inner pipe, 42. Outer pipe, 421. Card slot, 5. Fixing seat, 6. Exhaust fairing, 61. Partition B, 7. Lock Device, 71, connector A, 711, pipe connection part, 7111, clamping block, 7112, gap, 712, locking part, 7121, locking piece, 72, connector B.

Detailed ways

The preferred embodiments of this patent will be described in further detail below in conjunction with the accompanying drawings.

A smoke eliminator as shown in FIG. 1 and FIG. 2 includes a smoke eliminator body, an exhaust pipe 4 and a fixing seat 5 for fixing the smoke eliminator body. The smoke eliminator body includes a housing 1, a fan 2 arranged in the housing 1 and a lighting assembly 3 installed outside the housing. The smoke eliminator in this application can realize the functions of lighting and smoke exhaust and dust removal.

The housing of the smoke eliminator body is divided into upper and lower layers and includes an upper housing 11 and a lower housing 12 . The overall width of the upper housing 11 is greater than that of the lower housing 12 . In order to realize the lighting function, a first-level lighting assembly 31 and a second-level lighting assembly 32 are arranged on the lower surfaces of the upper shell 11 and the lower shell 12 respectively, so that there is a height misalignment and an internal and external misalignment between the two-stage lighting assemblies. When used with a mahjong machine, the second-level lighting assembly 32 can be as close as possible to the mahjong machine desktop to improve the light effect on the mahjong machine desktop; the first-level lighting assembly 31 can expand the lighting range of the lighting assembly on the smoke eliminator. The maximum radial dimension distributed on the shell of the first-level lighting assembly is between 80cm-100cm. The size of the desktop width of mahjong machines on the market is generally about 85cm. The radial dimension of the first lighting assembly is set as above, which can Provide good lighting effects for users sitting around the mahjong machine. At the same time, the upper and lower layers of the housing 1 can avoid collisions between the user of the mahjong machine and the smoke eliminator.

Based on the consideration of lighting effect and smoke exhaust effect, the whole smoke eliminator is set as a hoisting structure in this embodiment. However, the overall volume of the smoke eliminator is relatively large, and the body of the smoke eliminator is fixed through the exhaust pipe. In order to ensure the stability of the hoisting structure, on the one hand, it is necessary to reduce the weight of the The strength of the connecting structure between the trachea 4. In order to achieve the above two objectives, in this embodiment, the smoke eliminator housing 1 is mainly an injection molded part, and the exhaust pipe 4 is a hollow metal pipe. In order to reduce the difficulty of production, as shown in Fig. 3-6, in this embodiment, the upper shell 11 and the lower shell 12 are set as independent structures, and the upper shell 11 and the lower shell 12 are connected after injection molding respectively. In this embodiment, the upper end of the lower housing 12 is connected to the lower surface of the upper housing 11 , and the inner cavity of the upper housing 11 communicates with the inner cavity of the lower housing 12 to form a fan installation cavity.

In this embodiment, the exhaust pipe 4 is connected to the smoke eliminator body by connecting the upper shell 11, and the fan 2 in the smoke eliminator body is also fixed on the upper shell 11. High expectations. Due to the large width of the upper shell 11 in the smoke eliminator body, it is difficult to form in processing, and it is difficult to meet the requirements for the strength of large-area injection molded parts. Therefore, as shown in FIG. 3 and FIG. 4 , in this embodiment, the upper casing is set to include two parts: the outer injection molded part 111 and the middle metal plate part 112 . The inner end of the peripheral injection molded part 111 is fixed to the outer end of the sheet metal part 112 . The strength requirement of the upper shell 11 is met by setting the metal plate 112 to connect the blower fan 2 and the exhaust pipe 4. The upper shell 11 only adopts a metal plate in the middle part for connecting the blower fan 2 and the exhaust pipe 4, and the remaining parts are still The use of injection molded parts can ensure that the overall weight of the upper housing 11 will not be too large, and ensure the stability of the hoisting structure. Moreover, the upper housing 11 needs to be provided with the installation groove 1121 of the first-level lighting assembly 31. Adopting a metal structure will greatly increase processing difficulty and processing cost. At the same time, under the same width requirement, it is easier to process the peripheral injection molded part 111 than the large-area injection molded part of the whole board. Therefore, arranging the upper shell to include two parts, the peripheral injection molded part and the middle metal plate part, can reduce the processing difficulty of the upper shell and ensure sufficient hoisting strength.

The outer end of the metal plate 112 arranged in the middle is provided with a ring of connecting structures for connecting with the peripheral injection molded parts. The middle part of the middle metal plate is provided with an opening 1121 for communicating with the air outlet of the fan, and the fan volute 21 is fixed on the bottom of the metal plate 112 . In order to ensure the exhaust effect, it is preferable that the size of the opening matches the air outlet of the fan.

The lower surface of the peripheral injection molding part 111 has an upward protrusion to form a mounting groove 1111 for installing the first lighting assembly. The positions of the structures on the lower surface of the second connecting portion 1113 connecting the metal plates are as follows: the first connecting portion 1112 is located inside the installation groove 1111 , and the second connecting portion 1113 is located at the inner end of the first connecting portion 1112 . Between the first connecting portion 1112 and the second connecting portion 1113 on the peripheral injection molded part, a vent 1114 communicating with the inner cavity of the lower housing 12 is provided. The installation groove 1111 is arranged near the outer end of the peripheral injection molded part, so that the first lighting assembly 31 installed in the installation groove has a large enough illumination coverage; the first connection part 1112 is located at the second connection for connecting the middle metal plate The outer end of the portion 1113, so that after the upper shell 11 and the lower shell are connected, it can ensure that the inner chambers of the upper shell 11 and the lower shell 12 are communicated through the vent 1114. The upper end of the upper shell is closed by a cover plate 13, so that an air pressure difference can be formed outside the shell.

In order to realize the smoke exhaust and dust removal function of the smoke eliminator, and to make the smoke eliminator achieve better results, three-stage air inlets are provided on the housing 1: the first-stage air inlet 121, the second-stage air inlet 122 and the second-stage air inlet. The three-stage air inlets 113 are all connected to the fan installation cavity inside the casing, and the three-stage air inlets are dislocated up and down and inside and out.

As shown in FIG. 5 and FIG. 6 , the first-stage air inlet 121 is disposed on the lower surface of the lower casing 12 . In order to isolate the second-level lighting assembly 32 and the smoke exhaust structure, and reduce the volume of the smoke eliminator as much as possible, the lower surface of the lower housing 12 is set as a hollow structure, and the top of the second-level lighting assembly 122 is connected to the bottom of the lower housing 12. There is an installation gap between the surfaces, and the installation gap is the first-stage air inlet 121 . In order to increase the air intake efficiency of the first-stage air inlet, the lower surface is set as a hollow structure in the middle, and on the premise of ensuring the installation strength, the area of the hollow part is increased as much as possible. In order to simplify the installation, in this embodiment, the lower end of the lower housing 12 is set to be turned inwardly to form a circle of turned edges, and at least 4 studs are formed on the turned edges. The structure of the second lighting assembly is shown in Figure 7, and the upper surface of the second lighting assembly 32 is provided with the connecting hole corresponding to the stud, so that the second-level lighting assembly 32 after the installation is completed and the lower layer of the lower housing 12. There is an installation gap communicating with the fan installation cavity between the surfaces.

The second-stage air inlet 122 is arranged on the outer peripheral surface of the lower shell 12, and the second-stage air inlet 122 occupies a relatively large height on the lower shell. Preferably, the second-stage air inlet 122 is arranged on the lower half of the lower shell. Part, this way, can inhale as much smoke as possible.

The third-level air inlet 113 is arranged on the lower surface of the upper shell 11, and the setting positions of the third-level air inlet are distributed on the lower surface of the upper shell where the remaining part of the first-level lighting assembly is installed, preferably, the third-level air inlet 113 is disposed near the outer edge of the lower surface of the upper casing 11 .

The setting positions of the above-mentioned three-stage air inlets are distributed according to the characteristics of the upward smoke exhaust of the smoke eliminator, and there are height dislocations and internal and external dislocations between the three-stage air inlets. In this way, when the fan is working, the first-stage air inlet 121 sucks in a large amount of air from the lower part. The smog that escapes from the first-stage air inlet 121 and diffuses upward is inhaled by the second-stage air inlet 122 in turn, and the smog that escapes from the second-stage air inlet 122 and diffuses upward is inhaled by the third-stage air inlet 113. The air entering the inner cavity of the upper shell through the air inlet 113 enters the installation cavity of the lower shell 12 through the vent 1114 on the lower surface of the upper shell 11, so that the air inlet on the shell has a good smoking effect and a large enough coverage .

As shown in FIG. 10 and FIG. 11 , the fan 2 in this embodiment is a twin-turbine fan, including a volute 21 and two centrifugal impellers 22 that rotate in opposite directions driven by a motor. The volute 21 includes two half-shells that are front and back symmetrical and fixed as a whole. The half-shells include a panel 211 and a side plate 212 for forming two left-right symmetrical air passages. The side plate 212 is provided with a gap for forming an air outlet. The panel is provided with two air inlets 213 corresponding to the two air ducts, and protective nets are formed at the two air inlets, and the two air ducts are separated by a partition A214. After the two half-shells are fixedly connected, the side plates 212 on the two half-shells cooperate with the volute 21 to form a complete air duct, the gaps on the two side plates form a complete air outlet, and the two partitions A fit together to form a complete air duct. The inner cavity of the volute is divided into two left and right air ducts 215, and the two air ducts share one air outlet.

Two centrifugal impellers 22 rotating in opposite directions driven by the motor are installed in left and right in the volute 21 , and the blades of the two centrifugal impellers 22 are respectively arranged towards the two air ducts 215 in the volute. The air inhaled from the air inlet 213 passes through the action of the centrifugal impeller 22 and then enters the air channel in a reverse direction, moves at high speed along the air channel and is discharged from the air outlet. The two centrifugal impellers rotate in opposite directions synchronously, and the air is exhausted through two air ducts, which can effectively increase the exhaust air volume.

In order to facilitate the installation of the two volutes, connecting edges (216) are respectively provided at the junction of the two half-shells, screw holes are provided on the connecting edges (216), and the two half-shells are connected by bolts; The joints of the two partitions A (214) and the joints of the two partitions A (214) are provided with grooves and protrusions that cooperate with each other, and the grooves and protrusions are provided to facilitate the alignment of the connecting holes on the two half shells.

In this embodiment, the exhaust pipe 4 has functions of hoisting and smoke exhaust, and the exhaust pipe is a hollow pipe structure with relatively high strength. The air outlet of blower fan 2 communicates with exhaust pipe 4 inside, preferably, as shown in Figure 2, the air outlet place of blower fan 2 is provided with exhaust fairing 6, and exhaust pipe 4 is connected on the air outlet of exhaust fairing 6 , The gas discharged from fan 2 is discharged into the exhaust pipe after passing through the exhaust fairing. As shown in FIG. 8 (exhaust fairing), in order to play a rectifying role, the exhaust fairing 6 has a transition that decreases in radial size from bottom to top. The lower end of the exhaust fairing 6 is fixed to the upper surface of the upper metal plate 112 of the upper casing, and the interior of the exhaust fairing 6 is provided with a partition B61 corresponding to the partition A214 in the fan volute. The reason for setting the partition B is that the power of the two centrifugal impellers in the volute cannot be exactly the same in the actual use of the twin-turbine fan used in this embodiment. If the partition B is not provided, the exhaust cowl may appear The gas in the blower pours back into the blower fan volute 21 and damages the blower blower.

When the fan 2 is working, the air outside the smoke eliminator enters the fan installation chamber inside the smoke eliminator housing 1 from the three-stage air inlet, and then enters the air duct 215 from the air inlet of the fan, and is driven by the centrifugal impeller 22 from The air outlet of the fan is discharged into the exhaust pipe 4, and the other end of the exhaust pipe 4 is connected with the exhaust gas treatment device. The air extraction equipment in the exhaust gas treatment device extracts the air in the exhaust pipe, and then the exhaust gas is processed by the purification equipment. Thereby realizing the smoke exhaust function of the smoke eliminator.

In this embodiment, it can be seen from the combination of the fixing method of the fan and the positional relationship between the upper casing and the lower casing that most of the fan 2 is located in the lower casing. The overall height of the smoke eliminator body is limited by the total height of the upper shell and the lower shell, because the height occupied by the fan in the shell of the smoke eliminator body cannot be changed basically. In order to reduce the overall height of the smoke eliminator as much as possible, it is preferable that the parts from the first connection part 1112 to the second connection part 1113 on the lower surface of the peripheral injection molding part 111 have an upwardly rising slope, so that the fan can be raised as high as possible in the casing The installation height reduces the height of the lower shell to reduce the overall height of the smoke eliminator body.

As a preference, in order to make the smoke eliminator have different installation heights to adapt to different installation places, the height of the metal smoke exhaust pipe 4 is adjustable. Therefore, the exhaust pipe 4 is set to include two parts, the inner pipe 41 and the outer pipe 42, the outer pipe 42 is sleeved on the outer periphery of the inner pipe 41, the exhaust fairing 6 is fixed on the lower end of the inner pipe 41, and the upper end of the outer pipe 42 is fixed. On the fixing seat 5 , the outer pipe 42 can slide up and down relative to the inner pipe 41 and a locking device 7 is provided at its lower end to lock the relative position between the outer pipe 42 and the inner pipe 41 .

As shown in FIG. 9 , the locking device 7 includes a connecting piece A71 and a connecting piece B72 , the connecting piece A71 is fixed at the lower end of the outer pipe 42 , and the connecting piece 72B is sleeved on the outer periphery of the inner pipe 41 . The connecting piece A71 is fixed on the lower end of the outer pipe 42. The connecting piece A71 has several locking pieces 7121. The connecting piece B72 is set on the locking piece 7121 and is used to compress the locking piece 7121 to deform and lock the inner pipe 41, so as to realize the inner pipe 41 and the locking between the outer pipe 42.

The connector A71 includes a pipe connection part 711 and a locking part 712. The pipe connection part 711 is located above the locking part 712. The pipe connection part 711 is provided with several outwardly protruding blocks 7111 on its outer surface. Slits 7112 are respectively provided on both sides of the clamping block, so that the position where the clamping block 7111 is disposed on the pipe connection portion 711 can be deformed within a certain range along the gap 7112 toward the inner and outer ends. The locking part 712 is provided with an external thread and a locking piece 7121. The locking piece 7121 is located at the lower end of the locking part and arranged along the circumference of the locking part. The gap or notch extending upward from the lower end of 711 reduces the mutual interference of adjacent locking pieces 7121 during locking the inner pipe, and increases the elastic deformation of the locking pieces 7121, making the locking pieces easier to lock.

The connector B72 is ring-shaped, and the inner wall of the connector B72 is provided with an internal thread that matches the thread on the connector A. When the connector B72 and the connector A71 are threaded and locked, the inner wall of the connector B71 presses the connector Locking piece 7121 on A71.

In order to make the locking more firm, the outer wall of the locking piece on the connecting piece A71 has a tapered surface with a thick top and a thin bottom, and the inner wall of the connecting piece B72 is set as a taper sleeve matching the tapered surface.

The lower end of the outer pipe 41 is provided with a slot for matching with the upper block of the connector A71. The connection process between the outer pipe 41 and the connector A71 is as follows: insert the pipe connection part 711 of the connector A71 into the lower end of the outer pipe 42 from the lower end, and then insert During the process, due to the extrusion of the inner wall of the outer pipe 42, the plate near the block 7111 will be deformed inward to avoid it. After loading, adjust the relative angle between the connecting piece A71 and the outer pipe 42 to make the block 7111 and the groove 421 is aligned, and the plate near the clamping block 7111 clamps the clamping block 7111 into the clamping groove 421 under the action of its restoring force to realize the connection between the outer pipe 42 and the connector A71.

The locking process of the connecting piece A71 and the connecting piece B72 is as follows: the connecting piece A71 and the connecting piece B72 are connected by threads, and during the thread feeding process, the tapered sleeve on the inner wall of the connecting piece B72 gradually presses the tapered surface of the connecting piece A71, so that the lock The tight piece 7121 is deformed so that the locking part 712 locks the inner pipe.

As a preference, in order to prevent the relative rotation of the outer pipe 42 and the inner pipe 41 in the process of sliding up and down, a guide block and a slide rail are arranged between the outer wall of the inner pipe 41 and the inner wall of the outer pipe 42 to cooperate with the guide, and the guide block can be It is integrally formed on the outer wall of the inner pipe or the inner wall of the outer pipe, or fixed to the inner wall of the inner pipe or the inner wall of the outer pipe as an independent structure; similarly, the slide rail can also be directly formed on the outer wall of the inner pipe or the inner wall of the outer pipe , can also be arranged on an independent component connected to the outer wall of the inner pipe or the inner wall of the outer pipe, any structure that can realize the cooperation between the guide block and the slide rail is all right.

Claims (7)

1. the double turbofans for smoke eliminator, which is characterized in that including spiral case（21）And two motor driving under reversely turn Dynamic centrifugal impeller（22）, spiral case（21）Including two half-shells that are front and back symmetrical and being fixed as one, each half-shell includes panel （211）With the side plate for being used to form two symmetrical air ducts（212）, side plate（212）It is equipped with and is used to form air outlet Notch, corresponding two air ducts set that there are two air inlets on panel（213）, pass through partition board A between two air ducts（214）It separates；Two After a half-shell is fixedly connected, the side plate in two half-shells（212）Cooperation is in spiral case（21）It is upper to form complete air duct, two side plates On notch formed a complete air outlet, two partition board A（214）Spiral case inner cavity is separated into two air ducts in left and right by cooperation （215）, two air ducts share an air outlet；Two reversely rotated centrifugal impellers under motor driving（22）Left and right arrangement peace Mounted in spiral case（21）It is interior, two centrifugal impellers（22）Blade be respectively facing two air ducts in spiral case（215）Setting.

2. the double turbofans according to claim 1 for smoke eliminator, which is characterized in that the split punishment of two half-shells Side She You not connected（216）, connect side（216）It is equipped with screw hole, two half-shells are bolted；In the splicing of two half-shells Place and two partition board A（214）Stitching portion mutually matched groove and bulge-structure are set.

3. the double turbofans according to claim 1 for smoke eliminator, which is characterized in that in spiral case（21）Upper two into Protection network is formed at air port.

4. smoke eliminator, including smoke eliminator ontology and the exhaust pipe for fixing smoke eliminator ontology（4）, fixed seat（5）, smoke eliminator sheet Body includes shell（1）With the wind turbine being arranged in shell（2）, which is characterized in that the wind turbine is any one in claim 1-3 Double turbofans described in.

5. smoke eliminator according to claim 4, which is characterized in that wind turbine（2）Air outlet be equipped with exhaust fairing（6）, The exhaust fairing（6）The transition dimensionally reduced is deposited from its air inlet to its air outlet；Exhaust fairing（6）Interior correspondence Partition board A（214）Equipped with partition board B（61）.

6. smoke eliminator according to claim 4, which is characterized in that shell（1）Including layer shell（11）With lower layer's shell （12）, layer shell（11）Overall width be more than lower layer's shell（12）Overall width, on shell be equipped with the first order enter the wind Mouthful（121）, second level air inlet（122）With third level air inlet（113）, three-level air inlet conducting hull outside and wind turbine Installation cavity, the three-level air inlet misplaces up and down and inside and outside dislocation；Layer shell（11）Inner cavity and lower layer's shell（12）Inner cavity is total Similar shape is at wind turbine installation cavity.

7. smoke eliminator according to claim 4, which is characterized in that exhaust pipe（4）The other end and emission-control equipment connect Logical, emission-control equipment includes air-extractor and cleaning equipment.