CN207214196U - Blower fan system and application have the range hood of the blower fan system - Google Patents

Abstract

The utility model discloses a kind of blower fan system, including two blower fans, it is characterised in that：Two blower fans are respectively the first ternary blower fan and the second ternary blower fan, the first ternary blower fan has the first air inlet, the second ternary blower fan blower fan has the second air inlet, on oil smoke flow path, second air inlet is located at the downstream of the first air inlet or is equal with the first air inlet position.Also disclosing a kind of application has the range hood of above-mentioned blower fan system.By using two ternary blower fans, blower fan structure is compact, size is relatively small, fan efficiency and blast are high, and caused suction gradient is big, smoking efficiency can significantly be lifted, and the ternary blower fan for passing through small size, it can cause two ternary blower fans that still there is less size under combination in parallel or series so that range hood need not change existing size, and installation will not also be limited by floor floor height.

Description

Blower fan system and application have the range hood of the blower fan system

Technical field

Machine for kitchen use, especially blower fan system are the utility model is related to, and application has the range hood of the blower fan system.

Background technology

Range hood turns into one of machine for kitchen use equipment indispensable in Modern Family.Usual range hood includes top Suction and near-absorption type, the range hood of top suction type utilize the principle that hot gas rises, and suction is caused when cooking to be risen naturally Oil smoke, additionally due to it is clean and tidy light and handy, occupy little space the advantages that, it is and in an increasingly wide range of applications, but because it is dynamic Power source from the kitchen range top farther out, makes the suction effect of power source reduce, and oil smoke can not exhaust completely；The range hood of near-absorption type utilizes whirlpool It is remote to flow blast, the major part oil smoke nearer apart from the kitchen range top is absorbed with form of arcs, the bad shadow to health can be reduced Ring, and power source is nearer from the kitchen range top, will not substantially reduce the suction effect of power source, but due to the oil smoke rate of climb compared with It hurry up, or it is helpless to the oil smoke of a small number of upward escapes.

Existing range hood, a kind of range hood as disclosed in the Chinese patent of Application No. 201420665919.8, Including casing, exhaust fume collecting hood, centrifugal blower, panel, oil network, deflector and oil-containing groove, exhaust fume collecting hood is arranged on the top of casing, centrifugation Blower fan is arranged in exhaust fume collecting hood, and the air inlet of centrifugal blower is facing forward.

The blower fan system of range hood is discharged fume poor, the large effect adaptation of range hood to high-drag pipe network at present Property influence User Status under smoke absorption effect.And it is current, due in city larger a part of range hood in use state, Oil smoke is except needing the smoke exhaust pipe by itself, after check (non-return) valve and discharge flue, it is also necessary to connect firebreak device and public cigarette Road could discharge oil smoke, and for the higher residential building of some floors, common flue is often longer, and common flue Outlet is arranged on the top of floor, and so for the resident family positioned at lowrise layer, the back pressure of its range hood will be very big, this The use of more drag devices, the flow that range hood is carved when in use can be greatly lowered, smoke absorption effect is deteriorated, simultaneously Noise is larger.

Therefore, there is now two fans combination structure, this blower fan structure have two can independent operation blower fan, energy It is enough to obtain bigger stronger wind-force.One of which is two fans parallel-connection structure, such as Application No. 201720109507.X China A kind of double volute blower fan disclosed in patent, including housing, two blower fans are provided with housing, and two blower fans share an air-out Mouthful, air outlet has a cylindrical passageway, is provided with mobilizable deep bead in the middle part of cylindrical passageway, and deep bead is along cylindricality The length direction of passage extends to air outlet, cylindrical passageway is divided into two single air-out passages, each air-out passage is equal Be connected with a blower fan, and rotate deep bead optionally one of air-out passage can be closed, while by another Air-out passage is opened；A kind of and for example range hood disclosed in the Chinese patent of Application No. 201610650071.5, including it is multiple Fan assembly and deflector, multiple air inlets are provided with deflector, multiple air inlets are corresponding with multiple fan assemblies.

When above-mentioned two fans in parallel are applied into the range hood of top suction type, because volume is excessive, and can not be applicable In existing blower fan cabinet.And the mode of this fan parallel-connection, because the flow losses of impeller are by internal fluid pressure, stream Speed, flow to it is inconsistent caused by molecular collision, shearing friction and produce, this partial loss is occupied in the mechanical loss of blower fan Significant proportion, thus gas enter spiral case after, under the driving of impeller, motion of being spinned from impeller central to edge, direction is not Disconnected to change, pressure and speed improve constantly from inside to outside, and finally from impeller edge, tangential direction leaves impeller and enters inlet/outlet, due to The constantly increase of volute cross section of fluid channel product, pressure constantly increases fluid under the action of the centrifugal force, the linear velocity under impeller blade promotion Improving constantly, the difference of flow velocity and pressure is also increasing in the same radial section of volute runner, in diffuser pipe, flow velocity The gases different with pressure mutually mix, and produce strong friction and shock, enter layer in the form of violent turbulent flow, vortex Stream, a big chunk speed kinetic energy of gas and pressure potential are converted into heat and lost in the process, form flowing damage The pith of mistake；In addition, usually used blower fan is multi-wing centrifugal fan, air draught is inconsistent after parallel connection, operation is unstable, operation It is less efficient.

In addition, another kind is then two fans cascaded structure, as the applicant Application No. 201310248436.8 in A kind of lampblack absorber disclosed in state's patent, including casing, casing lower section are provided with oil smoke import, and being provided with oil smoke above casing goes out Mouthful, the blower fan system of air intake vent and oil smoke inlet communication, air outlet and oil smoke outlet, blower fan system bag are provided with casing Include：First centrifugal blower, air intake vent and the oil smoke inlet communication of the first centrifugal blower；Second centrifugal blower, the second centrifugal blower Air intake vent and the air outlet of the first centrifugal blower between by one bending connecting pipe connect, the air-out of the second centrifugal blower Mouth and oil smoke outlet.Because centrifugal blower volume is larger, connected in the manner cloth when by two centrifugal blowers Postpone, the height for causing casing is limited more than floor, so that can not normal use.

Utility model content

First technical problem to be solved in the utility model is in view of the above-mentioned problems of the prior art, providing one Kind ensures air quantity and need not change the blower fan system of Cabinet Size.

Second technical problem to be solved in the utility model is to provide the oil suction that a kind of application has above-mentioned blower fan system Cigarette machine.

Technical scheme is used by the utility model solves above-mentioned first technical problem：A kind of blower fan system, including Two blower fans, it is characterised in that：Two blower fans are respectively the first ternary blower fan and the second ternary blower fan, the first ternary blower fan With the first air inlet, the second ternary blower fan blower fan has the second air inlet, and on oil smoke flow path, described second enters Air port is located at the downstream of the first air inlet or is equal with the first air inlet position.

According to one side of the present utility model, on oil smoke flow path, second air inlet and the first air inlet Position is equal, and first air inlet is set up in parallel with the second air inlet and is respectively facing opposite both direction.

Preferably, for ease of driving draught fan impeller, the first ternary blower fan includes the first 3 d impeller, and the described 2nd 3 First blower fan includes the second 3 d impeller, and first 3 d impeller and the second 3 d impeller pass through the driving electricity with double output shaft Machine is driven.

According to other side of the present utility model, on oil smoke flow path, second air inlet enters positioned at first The downstream in air port, first air inlet and the second air inlet are towards identical direction.

Preferably, the first 3 d impeller, second ternary are included for ease of the arrangement of blower fan, the first ternary blower fan Blower fan includes the second 3 d impeller, and first 3 d impeller and the second 3 d impeller are independent mutually.

First technical scheme is used by the utility model solves above-mentioned second technical problem：One kind application just like The range hood of upper described blower fan system, including exhaust fume collecting hood and the cabinet above exhaust fume collecting hood, the blower fan system are set In cabinet, first air inlet and the second air inlet are respectively facing the arranged on left and right sides of cabinet.

Preferably, to reduce windage on the premise of Cabinet Size is not increased, smoke absorption effect, first ternary are improved First 3 d impeller of blower fan, the second 3 d impeller of the second ternary blower fan respectively from the horizontal by 60 °~90 °, and And two 3 d impellers tilt in the opposite direction.

Second technical scheme is used by the utility model solves above-mentioned second technical problem：One kind application just like The range hood of upper described blower fan system, including exhaust fume collecting hood and the cabinet above exhaust fume collecting hood, the blower fan system are set In cabinet, first air inlet and the second air inlet are down.

The 3rd technical scheme is used by the utility model solves above-mentioned second technical problem：One kind application just like The range hood of upper described blower fan system, including exhaust fume collecting hood and the cabinet above exhaust fume collecting hood, the blower fan system are set In cabinet, first air inlet and the second air inlet are obliquely down.

Compared with prior art, the utility model has the advantage of：It is tight by using two ternary blower fans, blower fan structure To gather, size is relatively small, and fan efficiency and blast are high, and caused suction gradient is big, smoking efficiency can significantly be lifted, and By the ternary blower fan of small size, it can cause two ternary blower fans that still there is less chi under combination in parallel or series It is very little so that range hood need not change existing size, and installation will not also be limited by floor floor height.

Brief description of the drawings

Fig. 1 is the schematic diagram of range hood one embodiment of the present utility model；

Fig. 2 is that Fig. 1 range hood hides the schematic diagram of cabinet front side wall；

Fig. 3 is Fig. 1 blower fan system of range hood and the sectional view of outlet housing；

Fig. 4 is the schematic diagram of the outlet housing of Fig. 1 range hood；

Fig. 5 is the schematic diagram of second embodiment of range hood of the present utility model；

Fig. 6 is Fig. 5 blower fan system of range hood and the sectional view of outlet housing；

Fig. 7 is the schematic diagram of 3rd embodiment of range hood of the present utility model；

Fig. 8 is the sectional view of Fig. 7 range hood；

Fig. 9 is the schematic diagram of 4th embodiment of range hood of the present utility model；

Figure 10 is the sectional view of Fig. 9 range hood；

Figure 11 is the schematic diagram of 5th embodiment of range hood of the present utility model；

Figure 12 is the sectional view of Figure 11 range hood.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing embodiment.

Embodiment one

Referring to Fig. 1~Fig. 4, a kind of range hood, including exhaust fume collecting hood 1, the cabinet 2 above exhaust fume collecting hood 1, for ease of retouching State, hereinafter, "front", "rear", "left", "right", " on ", " under " each mean user when using range hood, fume-exhausting Machine and is not limited structure relative to the orientation of user.

In the present embodiment, cabinet 2 include front side wall 21, respectively positioned at the left and right sides left side wall 22 and right side wall 23, And rear wall 24, a cavity, the cavity are surrounded between above-mentioned front side wall 21, left side wall 22, right side wall 23 and rear wall 24 Air channel 25 as in cabinet 2, the entrance of air channel 25 (bottom of cabinet 2) and the air inlet (not shown) pair opened up on exhaust fume collecting hood 1 Should, the porch of air channel 25 is provided with screens 26.Blower fan system 4 is provided with cabinet 2, blower fan system 4 can use such as background Two fans parallel-connection structure described in technology.And in the present embodiment, it is preferred that blower fan system 4 can independent operation including two The first ternary blower fan 41 and the second ternary blower fan 42, two ternary fan parallel-connections set.By using 3 d impeller, compared to Centrifugal blower, flow efficiency can be significantly increased, improve air quantity.

First ternary blower fan 41 includes the first spiral case 411 and the first 3 d impeller 412 being arranged in the first spiral case 411, Second ternary blower fan 42 includes the second spiral case 421 and the second 3 d impeller 422 being arranged in the second spiral case 421.First spiral case 411 and second spiral case 421 side by side, compartment of terrain arrangement, formed with the first air inlet 413, the second spiral case 421 on the first spiral case 411 On formed with the second air inlet 423, away from each other, i.e. the air inlet 313 of the first spiral case 411 is formed the air inlet of two spiral cases Side away from the second spiral case 421, two back-to-back settings of spiral case so that two ternary blower fans are arranged side by side in left and right, and First air inlet 413 is towards the left side of cabinet 2, the second air inlet 423 towards the right side of cabinet 2.Oil smoke enters from exhaust fume collecting hood 1 When, entered respectively from arranged on left and right sides in blower fan system 4.The top of first spiral case 411 forms the first air outlet 414, the second snail The top of shell 421 forms the second air outlet 424, the first air outlet 414 and the second air outlet 424 side by side, compartment of terrain arrangement.

First 3 d impeller 412 and the second 3 d impeller 422 can use prior art, such as the Application No. of the applicant 201620102790.9 patent disclosed in structure.First 3 d impeller 412 and the second 3 d impeller 422 share same Motor 43, motor 43 are arranged between the first spiral case 411 and the second spiral case 421, and motor 43 has dual output Axle, the output shaft 431 thus extended to the left can be connected with the first 3 d impeller 412 and drive the first 3 d impeller 412 to operate, to The output shaft 431 of right extension can be connected with the second 3 d impeller 422 and drive the second 3 d impeller 422 to operate.Thus may be such that Two ternary blower fans have preferable synchronism, while and can saves the energy.

First 3 d impeller 412 and the second 3 d impeller 422 can be respectively from the horizontal by 60 °~90 °, two impellers (the first 3 d impeller 412 is tilted to the left, and the second 3 d impeller 422 is tilted to the right) is tilted in the opposite direction, it is possible thereby to Reduce windage, improve smoke absorption effect.The center of first 3 d impeller 412 and the entrance of air channel 25 of range hood keep certain Distance, the distance are 1~2 times of diameter of the first 3 d impeller 412, the center of the second 3 d impeller 422 and range hood The entrance of air channel 25 maintains a certain distance, and the distance is 1~2 times of the diameter of the second 3 d impeller 422, impeller central and air channel The distance of 25 entrances have to be larger than impeller diameter, and the screens 26 of such porch of air channel 25 can just play a role, but can not More than 2 times diameters, otherwise apart from negative pressure region away from too far away.

Above-mentioned two ternary blower fan, same structure, and this arrangement, blower fan system overall volume can be used It is smaller, 2 original size of cabinet can not changed, and can make it that air quantity is double in the case where keeping higher blast, improves and inhales Oil smoke efficiency.Two air inlets are respectively facing arranged on left and right sides so that the negative pressure region area increase of two side peripheries, suitable for two Individual kitchen range, reach the effect for not running cigarette；Noise transmission path makes towards arranged on left and right sides rather than direction in the prior art User, thus reduce noise.

The top of blower fan system 4 is provided with outlet housing 5, and the cover body 51 of outlet housing 5 covers the first of the first ternary blower fan 41 First air outlet 414 of spiral case 411, the second spiral case 421 of the second ternary blower fan 42 the second air outlet 424 and connect. In the present embodiment, outlet housing 5 includes cover body 51, the deflector being arranged in cover body 51.Cover body 51 is in hollow tubular, and Relative first end 511 (lower end) and the second end 512 (upper end) opening, the bore of first end 511 are more than the mouth at the second end 512 Footpath, that is, it is open and is gradually reduced from close to the position of blower fan system 4 to away from the position of blower fan system 4, oil smoke air-flow is from first end 511 enter in cover body 51, and leave cover body 51 into the external pipe being connected with outlet housing 5 from the second end 512.

Deflector includes the first deflector 521 and the second deflector 522, first end of first deflector 521 from cover body 51 511 extend to the second end 512, and the first deflector 521 is at the first end 511 of cover body 51, with the first ternary blower fan 41 First edge of the second air outlet 424 close to the second ternary blower fan 42 at the first air outlet 414 be 415 (the first air outlet Right edge) corresponding, second air outlet of second deflector 522 at the first end 511 of cover body 51, with the second ternary blower fan 42 Second edge 425 (left side edge of the second air outlet) of the first air outlet 414 close to the first ternary blower fan 41 at 424 is right Should.Each deflector has the width extended in front and rear direction.First deflector 521 by the end of first end 511 to the second 512, The second deflector 522 (to the right) is increasingly towards to tilt, the second deflector 522 by the end of first end 511 to the second 512, be increasingly towards First deflector 521 tilts (to the left), i.e., each deflector deviates middle position into the top of cover body 51 from the bottom of cover body 51 Between position extension.First deflector 521 is mutually connected with the top of the second deflector 522 (close to the second end 512 of cover body 51) Connect, it is preferred that the junction of two deflectors is in rounding off, so as to guide air-flow smooth transition.

5211,5212 madial wall all the time with cover body 51 of front and rear sides side of first deflector 521 is connected, the second water conservancy diversion 5221,5222 madial wall all the time with cover body 51 of front and rear sides side of plate 522 is connected.Thus cover body 51 is divided into cover body 51 Between the first diffusion runner 531, the madial wall of cover body 51 and the second deflector 522 between madial wall and the first deflector 521 Second diffusion runner 532, the first diffusion runner 531 and the second diffusion runner 532 are independent mutually.First diffusion runner 531 is in cover It is corresponding with the first air outlet 414 of the first ternary blower fan 41 at the first end 511 of body 51, that is, the first air outlet 414 is completely covered, Second diffusion runner 532 is corresponding with the second air outlet 424 of the second ternary blower fan 42 at the first end 511 of cover body 51, i.e., complete The second air outlet of all standing 424.The sectional area of first diffusion runner 531 is gradually reduced by the end of first end 511 to the second 512, the The end 512 of sectional area first end 511 to the second of two diffusion runners 532 is gradually reduced, thus, the top of the first diffusion runner 531 Muzzle velocity is more than the muzzle velocity of the bottom of the first diffusion runner 531, and the muzzle velocity at the top of the second diffusion runner 532 is more than the The muzzle velocity of the bottom of two diffusion runner 532.

By setting above-mentioned deflector so that first connected with the first air outlet 414 of the first ternary blower fan 41 is expanded Pressure runner 531, the air velocity of the second diffusion runner 42 connected with the second air outlet 424 of the second ternary blower fan 42 connect each other Closely.This guide functions of outlet housing 5 are advantageous to exit gas and form laminar flow, enter external pipe after forming laminar flow, avoid The defects of air-flow is directly entered external pipe after being come out from spiral case with turbulent condition, it also avoid the air outlet of two ternary blower fans Strong friction and shock when air-flow mixes, so as to which flow losses be greatly lowered, improve efficiency.

Sound-absorbing hole 54 is densely covered with first deflector 521 and/or the second deflector 522, advantageously reduces outlet noise.For Noise is further reduced, space that can also be between the first deflector 521 and the second deflector 522 sets dividing plate 55 so that Space between first deflector 521 and the second deflector 522 is divided at least two resonant cavities 551.Or can also be Space between first deflector 521 and the second deflector 522 sets acoustical cotton.Or dividing plate can also be replaced with reinforcement 55, to strengthen the intensity of deflector.

Embodiment two

Referring to Fig. 5 and Fig. 6, in the present embodiment, it is with the difference of above-described embodiment one, the first ternary blower fan 41 Same spiral case 44, i.e. the first 3 d impeller 412 and the second ternary of the first ternary blower fan 41 are shared with the second ternary blower fan 42 Second 3 d impeller 422 of blower fan 42 is co-located in same spiral case 44.

Installing plate 45 is provided between two 3 d impellers, so as to which two 3 d impellers be separated the two of installing plate 45 Side, installing plate 45 extend to the top of spiral case 44, so as to be separated into two independent oil smoke passages 441 in spiral case 44.Driving Motor 43 is passed through from installing plate 45 and is connected with installing plate 45.

In the present embodiment, outlet housing 5 only includes cover body 51 and the deflector 56 being arranged in cover body 51, deflector 56 Extend on the flow direction of oil smoke, in the present embodiment, to extend in the vertical, position and the phase of installing plate 45 of deflector 56 It is corresponding, so as to which cover body 51 is divided into the independent first diffusion runner 531 corresponding with the oil smoke passage in spiral case 44 and the Two diffusion runners 532.

Alternatively, outlet housing 5 can also use the structure of embodiment one.

Embodiment three

Referring to Fig. 7 and Fig. 8, in the present embodiment, it is with the difference of above-described embodiment one, two ternary blower fans are adopted Arranged with the mode of series connection, and it is each independent, there is independent motor 43.

First ternary blower fan 41 (as first order blower fan) and the second ternary blower fan 42 (as second level blower fan) are mutual respectively It is mutually independent, and be in horizontal arrangement, i.e., the air inlet of two ternary blower fans is down.Second ternary blower fan 42 is located at first The top of ternary blower fan 41, two ternary blower fan arranged for interval.Oil smoke enters fashionable from exhaust fume collecting hood 1, passes sequentially through the first ternary wind Machine 41 (upstream of oil smoke flow path) and the second ternary blower fan 42 (downstream of oil smoke flow path).First ternary blower fan 41 It is in the first open, i.e., above-mentioned air outlet between first air outlet 414 and the second air inlet 423 of the second ternary blower fan 42 414 and second are not connected by guide duct between air inlet 423, and oil smoke is directly discharged in cabinet 2 by the first air outlet 414 In air channel 25, oil smoke is sucked in air channel 25 of second air inlet 423 out of cabinet 2.

In the present embodiment, the first ternary blower fan 41 and the second ternary blower fan 42 are arranged in correspondence with each other, the first ternary blower fan 41 the first air inlet 413 and the second air inlet 423 of the second ternary blower fan 42 can correspond to (coaxial), the first ternary blower fan 41 The second air outlet 414 and the second ternary blower fan 42 the second air outlet 424 can also correspond to (coaxial).First air inlet 413 And second maintain a certain distance between air inlet 423, distance between the two and the first 3 d impeller 412 or the second ternary leaf Take turns the ratio 0.2~1 of the diameter of 422 (two 3 d impellers are identical).Suitable spacing is kept between two-stage blower fan so that first The exit flow of level blower fan being capable of abundant diffusion so that dynamic pressure switchs to static pressure, into second level blower fan；But can not be from too Far, the meaning of two fans series connection is otherwise lost.

First air inlet 413 of the first ternary blower fan 41 maintains a certain distance with the entrance of air channel 25, between the two away from From 1~2 times for the diameter of the first 3 d impeller 412, the center of the first 3 d impeller 412 and the distance of the entrance of air channel 25 must be big In the diameter of the first 3 d impeller 412, the screens 26 of such porch of air channel 25 can just play a role, but can not be more than 2 Times diameter, otherwise apart from negative pressure region away from too far away.

The mode of this arranged in series, realize oil smoke and directly inhale in line, improve static pressure, lift range hood effect；Two Level blower fan filtering, adds filter effect, improves grease separating degree；Two-stage fans in series, just it is not required to per one-level rotation speed of fan It is so high, it can effectively reduce noise.

Example IV

Referring to Fig. 9 and Figure 10, in the present embodiment, it is with the difference of above-described embodiment three, the first ternary blower fan 41 (as first order blower fans) and second ternary blower fan 42 (as second level blower fan) dislocation arrangement, i.e. the first ternary blower fan 41 First air inlet 413 close to right side, the second air inlet 423 of the second ternary blower fan 42 close to left side, the first ternary blower fan 41 Second air outlet 414 is close to left side, and the second air outlet 424 of the second ternary blower fan 42 is close to right side, now the first ternary blower fan 41 the first air outlet 414 is corresponding in vertical direction or close corresponding with the second air inlet 423 of the second ternary blower fan 42.The The distance between one air inlet 413 and the second air inlet 423 are the distance in vertical direction.

Embodiment five

Referring to Figure 11 and Figure 12, in the present embodiment, it is with the difference of above-described embodiment three, the first ternary blower fan 41 and the second obliquely upper and lower arranged for interval respectively of ternary blower fan 42, i.e. the first air inlet 413 and water of the first ternary blower fan 41 Square to inclined down, the second air inlet 423 of the second ternary blower fan 42 and horizontal direction be inclinedly down.

Pass through between first air outlet 414 of the first ternary blower fan 41 and the second air inlet 423 of the second ternary blower fan 42 Guide duct 46 connects.Vertical range between the center of the first air inlet 413 of first ternary blower fan 41 and the entrance in air channel 25 is 0.5~2 times of the diameter of first 3 d impeller 412.

This tilting series system, the blower fan whole height of composition is relatively low, and fan outlet static pressure is larger, is advantageous to overcome The high-rise resistance of ducting, further, since the small size of ternary blower fan, Wind Volume, solve the problems, such as that floor floor height is limited.

Claims (9)

1. a kind of blower fan system, including two blower fans, it is characterised in that：Two blower fans are respectively the first ternary blower fan (41) and Two ternary blower fans (42), the first ternary blower fan (41) have the first air inlet (413), the second ternary blower fan (42) tool There is the second air inlet (423), on oil smoke flow path, second air inlet (413) is located under the first air inlet (413) Swim or be equal with the first air inlet (413) position.

2. blower fan system according to claim 1, it is characterised in that：On oil smoke flow path, second air inlet (413) it is equal with the first air inlet (413) position, first air inlet (413) and the second air inlet (413) be set up in parallel, And it is respectively facing opposite both direction.

3. blower fan system according to claim 2, it is characterised in that：The first ternary blower fan (41) includes the first ternary Impeller (412), the second ternary blower fan (42) include the second 3 d impeller (422), first 3 d impeller (412) and Two 3 d impellers (422) are driven by the motor (33) with double output shaft.

4. blower fan system according to claim 1, it is characterised in that：On oil smoke flow path, second air inlet (413) it is located at the downstream of the first air inlet (413), first air inlet (413) and the second air inlet (413) towards identical Direction.

5. blower fan system according to claim 4, it is characterised in that：The first ternary blower fan (41) includes the first ternary Impeller (412), the second ternary blower fan (42) include the second 3 d impeller (422), first 3 d impeller (412) and Two 3 d impellers (422) are independent mutually.

6. a kind of application has a range hood of blower fan system as claimed in claim 2 or claim 3, including exhaust fume collecting hood (1) and positioned at collection Cabinet (2) above petticoat pipe (1), the blower fan system are arranged in cabinet (2), and first air inlet (413) is entered with second Air port (413) is respectively facing the arranged on left and right sides of cabinet (2).

7. range hood according to claim 6, it is characterised in that：First ternary leaf of the first ternary blower fan (41) (412), the second 3 d impeller (422) of the second ternary blower fan (42) are taken turns respectively from the horizontal by 60 °~90 °, and Two 3 d impellers tilt in the opposite direction.

8. a kind of range hood applied just like the blower fan system described in claim 4 or 5, including exhaust fume collecting hood (1) and positioned at collection Cabinet (2) above petticoat pipe (1), the blower fan system are arranged in cabinet (2), and first air inlet (413) is entered with second Air port (413) is down.

9. a kind of range hood applied just like the blower fan system described in claim 4 or 5, including exhaust fume collecting hood (1) and positioned at collection Cabinet (2) above petticoat pipe (1), the blower fan system are arranged in cabinet (2), and first air inlet (413) is entered with second Air port (413) is obliquely down.