CN207247317U - A kind of range hood - Google Patents

Abstract

The utility model discloses a kind of range hood, including exhaust fume collecting hood, the cabinet being arranged on above exhaust fume collecting hood and the blower fan system being arranged in cabinet, air inlet is offered on the exhaust fume collecting hood, the cabinet is interior formed with air passage, it is characterised in that：The blower fan system includes the first ternary wind turbine and the second ternary wind turbine that are arranged in series, and the bottom, the inlet in air passage in the cabinet are provided with strainer, and the strainer includes the strainer body in up-small and down-big back taper, mesh is densely covered with the strainer body.By the strainer for setting concave back taper upwards, the distance with wind turbine can be shortened, close to strong negative pressuren zone, so that oil smoke is into fashionable, directly by strong suction function, so as to substantially increase air draught effect, flow field upper air inlet is smooth, do not influence the suction of range hood, avoid the occurrence of run oil smoke it is more, leakage suction phenomenon；Strainer is in following peripheral is low, middle height, and such oil smoke is in concentrated when absorbing, it is possible to increase the collection efficiency of greasy dirt；It is deep to collect cigarette, oil smoke is absorbed with not stopping deeply.

Description

A kind of range hood

Technical field

Machine for kitchen use is the utility model is related to, especially a kind of range hood.

Background technology

Range hood becomes 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.

Existing range hood, can be provided with filter screen for the purpose of collecting the oil smoke produced in culinary art, flue dust etc.. A kind of smoke exhaust ventilator as disclosed in the Chinese patent of Application No. 200780027956.9, has duct-ventilated hood, arranged on logical Exhaust fan in air passage, the filter screen in ventilating duct and before exhaust fan, drive division are connected on filter screen, hood Interior air entry is nearby equipped with flat cowling panel；It is and for example a kind of disclosed in the Chinese patent of Application No. 201620110299.0 Tablet smoke exhaust ventilator, including smoke collecting chamber, be arranged on above smoke collecting chamber air passage, be arranged in air passage wind turbine, filtering oil smoke dress Put, lampblack filter includes including the support being connected with fan shaft with the coaxial mounted filter screen disk of wind turbine, filter screen disk Frame and the filter screen being fixed on supporting rack.

Above-mentioned range hood, by installing rotating filter screen, expeditiously can carry out at purification filtering oil smoke Reason and decomposition.However, in the range hood of top suction type, the arrangement of above-mentioned wind turbine, causes oil smoke air-flow can not realize directly Inhale in line, therefore increase windage, reduce smoking efficiency.In addition, the cowling panel for being arranged on the air inlet of range hood is in Flat condition, can not play the role of oil smoke drainage, accelerate, it is difficult to effectively lift smoke absorption effect, and cowling panel is with respect to position Fixation is put, negative pressuren zone cannot be adjusted according to the service condition of hearth.

A kind of and for example rotation net purifier of smoke exhaust ventilator disclosed in the Chinese patent of Application No. 98202073.2, is taking out Swing frame is fixed with the motor shaft of kitchen ventilator wind wheel mouth, purse seine is welded around swing frame, on the inside of swing frame and purse seine, uses snap ring A rotation net is fixed, drives wind wheel, swing frame, rotation net, purse seine to rotate by motor, the rotation net of rotation carries out slag, oil, gas to oil smoke Three separates.Although this pumping smoke extractor, it can realize and directly inhale in line, but similar with above-mentioned vertical or tilting wind turbine, rotation The air inlet of centrifugal blower can only be arranged on by turning strainer, motor or single motor-driven rotation by centrifugal blower, thus Not only result in larger windage, and rotary sieve certain rectified action is played to oil smoke after enter centrifugal blower immediately Interior, path is too short, and rotary sieve makes the effect of airflow smooth not embody farthest.

Utility model content

Technical problem to be solved in the utility model is in view of the above-mentioned problems of the prior art, providing a kind of improve The range hood of fume-exhausting efficiency and oil separation effect.

Technical solution is used by the utility model solves above-mentioned technical problem：A kind of range hood, including exhaust fume collecting hood, The blower fan system for being arranged on cabinet above exhaust fume collecting hood and being arranged in cabinet, offers air inlet on the exhaust fume collecting hood, described Formed with air passage in cabinet, it is characterised in that：The blower fan system includes the first ternary wind turbine and the second ternary being arranged in series Wind turbine, bottom, the inlet in air passage in the cabinet are provided with strainer, and the strainer is included in up-small and down-big back taper Strainer body, is densely covered with mesh on the strainer body.

For ease of collecting the grease of cabinet, wind turbine and strainer itself, the edge of the strainer body stretch out formed with Cricoid oil trap, the outer edge of the oil trap are extended to outside the bottom of cabinet and are folded upward at.

To accelerate oil smoke flow velocity, fume-exhausting efficiency is improved, smoke deflector is provided with below air inlet, the smoke deflector Lower surface at least a portion in be gradually inclined upwardly from centre to edge, thus corresponding to exhaust fume collecting hood wall coordinates and limits The acceleration channels that cross section gradually decreases from the bottom to top.

Preferably, effectively to be accelerated to the oil smoke on smoke deflector periphery, the lower surface of the smoke deflector includes first At least one in inclined-plane, the second inclined-plane and the 3rd inclined-plane, first inclined-plane is tilted upward to the left by centre and exhaust fume collecting hood Left plate between form the first acceleration channels, second inclined-plane by it is middle tilt upward to the right, the right side with exhaust fume collecting hood The second acceleration channels are formed between plate, the 3rd inclined-plane is from centre to front side towards between inclination and the front side board of exhaust fume collecting hood Form the 3rd acceleration channels.

Further, it is respectively arranged with company for ease of the installation of smoke deflector, four corners of the upper surface of the smoke deflector Column is connect, the connecting pole is connected to the outer edge of the air inlet of exhaust fume collecting hood, so that smoke deflector be connected with exhaust fume collecting hood.

To allow smoke deflector according to the big minor adjustment of oil smoke height, preferably to improve smoke absorption effect, while Smoke deflector can be raised to extreme higher position and close air inlet when range hood is closed, and avoid the oil vapor backstreaming of common flue, described Connecting pole is by motor-driven telescopic rod.

On the basis of Cabinet Size is not changed, to increase air quantity, the first ternary wind turbine includes the first 3 d impeller With the first air inlet, the second ternary wind turbine includes the second 3 d impeller and the second air inlet, on oil smoke flow path, institute State the downstream that the second air inlet is located at the first air inlet, first air inlet and the second air inlet are towards identical direction.

To enable the abundant diffusion of exit flow of first order wind turbine so that dynamic pressure switchs to static pressure, into second level wind The diameter of machine, the first 3 d impeller and the second 3 d impeller is identical, the distance between described first air inlet and the second air inlet With the ratio 0.2~1 of the diameter of the first 3 d impeller.

One side according to the present utility model, it is in horizontal cloth downward that first air inlet and the second air inlet, which are, Put, the distance between first air inlet and tunnel inlet of the first ternary wind turbine are the 1~2 of the first 3 d impeller diameter Again, the center of first 3 d impeller and the distance of tunnel inlet are more than the diameter of the first 3 d impeller.

Other side according to the present utility model, first air inlet are to be in downward obliquely with the second air inlet Tilting, the vertical range between the first air inlet center of the first ternary wind turbine and the entrance in air passage is the first 3 d impeller 0.5~2 times of diameter.

To lift the flow field of wind turbine and reducing noise, the first air outlet of the first ternary wind turbine and the second ternary wind turbine The second air inlet between connected by guide duct.

Compared with prior art, the utility model has the advantage of：By setting the strainer of concave back taper upwards, energy Enough distances shortened with wind turbine, close to strong negative pressuren zone so that oil smoke is into fashionable, directly by strong suction function, so as to greatly improve Air draught effect；By setting the smoke deflector with inclined lower surface, oil smoke acceleration channels are collectively formed with exhaust fume collecting hood, can be increased The amount inside range hood is entered in the oil smoke unit interval, lifts smoke absorption effect；Pass through the filter of upward concave back taper Net and the smoke deflector with inclined lower surface, when oil smoke ascending air passes through smoke deflector, can produce separated whirlpool, can subtract It is slow to reduce negative pressure and the loss of corner since fluid velocity caused by sudden expansion declines suddenly, under convex smoke deflector and convex Oil network form small, the broad in the middle runner in a periphery so that collection cigarette is deeper, increase the volume of oil smoke cage cigarette, collect Soot gas, also increase the contact area of oil smoke and oil network, improve filter effect, lift grease separating degree, are also beneficial to The strong suction function of import of ternary wind turbine is given full play to, reduces inner air venturi effect, gas is reduced by reducing turbulent flow Flow noise；By using two ternary wind turbines, blower fan structure is compact, and size is relatively small, and fan efficiency and wind pressure are high, generation Suction gradient is big, smoking efficiency can significantly be lifted, and by the ternary wind turbine of small size, can be so that two ternary wind turbines Still there is less size under the combination of series connection so that range hood need not change existing size, install also not It can be limited be subject to floor floor height；Since negative pressure is larger at ternary fan inlet, the middle section of traditional oil network arrangement Lubricating cup is had, formation and the smoke absorption effect of negative pressure can be disturbed, reversion oil network need not set lubricating cup in middle section, it is only necessary to Oil is connect in neighboring area, is more conducive to the strong suction function for playing ternary wind turbine, and inverted arrangement is conducive to oil smoke acceleration, Smoke absorption effect is good.

Brief description of the drawings

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

Fig. 2 is the front section view (hiding outlet housing) of the range hood of Fig. 1；

Fig. 3 is the side sectional view of the range hood of Fig. 1；

Fig. 4 is the schematic diagram of the smoke deflector of the range hood of Fig. 1；

Fig. 5 is the schematic diagram of the rotary sieve of the range hood of the utility model；

Fig. 6 is the schematic diagram (hiding front side wall) of second embodiment of range hood of the utility model；

Fig. 7 is the sectional view of second embodiment of range hood of the utility model；

Fig. 8 is the schematic diagram (hiding front side wall) of the 3rd embodiment of range hood of the utility model；

Fig. 9 is the sectional view of the 3rd embodiment of range hood of the utility model.

Embodiment

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

Embodiment one

Referring to Fig. 1~Fig. 4, a kind of range hood, including exhaust fume collecting hood 1, the cabinet 2 for being arranged on the top of exhaust fume collecting hood 1, cabinet 2 Inside it is provided with blower fan system 4.Air inlet 11 is offered on exhaust fume collecting hood 1, thus, the blower fan system 4 in cabinet 2 can aspirate oil smoke Common flue is discharged into after entering cabinet 2 by air inlet 11.

Cabinet 2 includes left side wall 21, right side wall 22, front side wall 23 and rear wall 24, the cavity shape between above-mentioned each side wall Into the air passage 25 of oil smoke air-flow, it is preferred that air passage 25 is gradually reduced from the bottom to top.

In the present embodiment, blower fan system 4 is ternary wind turbine, and ternary wind turbine can use the prior art, such as Application No. 201310418009.X Chinese patent disclosed in.Blower fan system 4 can be single ternary wind turbine, two ternarys in parallel Wind turbine or the ternary wind turbines of two series connection, since ternary wind turbine has, compact-sized, size is relatively small, fan efficiency and wind pressure The characteristics of high, the suction gradient that can be produced is big, can be so that smoking efficiency is significantly lifted.The concrete structure of blower fan system 4 will It is described in detail below.The top of cabinet 2 is provided with the outlet housing 5 being connected with the air outlet of blower fan system 4, so as to pass through outlet housing 5, oil smoke can be drained into common flue.

It is located at the top of smoke collecting chamber 12, smoke collecting chamber 12 formed with concave up smoke collecting chamber 12, air inlet 11 in exhaust fume collecting hood 1 Interior, opposite with air inlet 11 position is provided with smoke deflector 8, and first passing through smoke deflector 8 before oil smoke enters range hood carries out Filtration treatment is condensed, carries out first time oil smoke separation.With reference to Fig. 5, the cross section of the shape of smoke deflector 8, size and smoke collecting chamber 12 Essentially coincide.

Lower surface at least a portion of smoke deflector 8 in being gradually inclined upwardly from centre to edge, thus with the phase of exhaust fume collecting hood 1 Wall is answered to coordinate and limit the acceleration channels that cross section from the bottom to top gradually decreases.When oil smoke flows to and lead from the bottom to top cigarette During the lower surface contact of plate 8, using Coanda effect, oil smoke is guided to horizontal direction shunting, then from the edge of smoke deflector 8 It imported into acceleration channels, then up flows between the upper surface of smoke deflector 8 and exhaust fume collecting hood 1 in the chamber formed, finally Entered by air inlet 11 in cabinet 2.

Due to acceleration channels, cross section is gradually reduced from bottom to top, after oil smoke enters acceleration channels, flow velocity can be continuous Ground increases, and the suction of oil smoke is also accordingly increased, is separated so that oil smoke can rapidly enter inside cabinet 2, And then improve the oil suction smoke in the range hood unit interval.

The lower surface of smoke deflector 8 can with all inclined-planes, can also a part be inclined-plane, another part be plane.Inclined-plane Can be inclined plane or arcwall face.In the present embodiment, the lower surface of smoke deflector 8 includes the first inclined-plane 81, the second inclined-plane 82 and the 3rd at least one in inclined-plane 83, wherein, the first inclined-plane 81 is tilted upward to the left by centre, the left side with exhaust fume collecting hood 1 The first acceleration channels 84 are formed between side plate 13, the second inclined-plane 82 is tilted upward to the right by centre, the right plate with exhaust fume collecting hood 1 Form the second acceleration channels 85 between 14, the 3rd inclined-plane 83 from centre to front side towards tilting, with the front side board 15 of exhaust fume collecting hood 1 it Between formed the 3rd acceleration channels 86.Each inclined-plane forms the complete lower surface of smoke deflector 8.In addition, above-mentioned left plate 13, right side The inner surface of plate 14 and front side board 15 (one side towards in smoke collecting chamber 12) can also be in gradually intilted oblique from the bottom to top Face.

Thus, by setting acceleration channels to realize drainage and acceleration work to oil smoke between exhaust fume collecting hood 1 and smoke deflector 8 With so as to improve the smoking oil mass in the range hood unit interval.

Four corners of 8 upper surface of smoke deflector are respectively arranged with connecting pole 87, be connected to exhaust fume collecting hood 1 air inlet 11 it is outer Edge, so that smoke deflector 8 be connected with exhaust fume collecting hood 1, connecting pole 87 can be fixed rod piece, or by motor-driven Telescopic rod, telescopic rod can use the prior art, so that smoke deflector 8 can be according to the big minor adjustment height of oil smoke, with preferably Smoke absorption effect is improved, while smoke deflector 8 can be raised to extreme higher position and close air inlet 11 when range hood is closed, and avoid The oil vapor backstreaming of common flue.

In cabinet 2, strainer 6 is provided with positioned at the lower section of blower fan system 4, and strainer 6 is arranged on above-mentioned each silencing apparatus Lower section, the bottom in cabinet 2.That is, strainer 6 is arranged on the inlet in above-mentioned air passage 25, in air passage 25 to oil Before cigarette accelerates, strainer 6 can come into full contact with oil smoke, realize preferable filter effect.Referring to Fig. 5, strainer 6 include present it is small under The strainer body 61 of big back taper, is densely covered with mesh 62 on strainer body 61, the edge of strainer body 61 stretches out to be formed There is cricoid oil trap 63, the outer edge of oil trap 63 is folded upward at and extends to outside the bottom of cabinet 2.

By setting the strainer 6 of concave back taper upwards, the distance with blower fan system 4 can be shortened, close to strong negative pressure Area so that oil smoke is into fashionable, directly by strong suction function, so as to substantially increase air draught effect.Flow field upper air inlet is smooth, not shadow Ring range hood suction, avoid the occurrence of run oil smoke it is more, leakage suction phenomenon；Strainer 6 is in following peripheral is low, middle height, such oil smoke It is in concentrated during absorption, it is possible to increase the collection efficiency of greasy dirt；In addition, collection cigarette is deep, oil smoke is absorbed with not stopping deeply, and by The following peripheral of strainer 6 carries out oil-collecting, more convenient that fluid is collected easy to the flowing of oil-collecting, avoids the drippage of oil droplet.

The first oil dripping hole 64 (above smoke deflector 8) is offered positioned at 63 part of oil trap of the rear side of strainer body 61, The rear end of smoke deflector 8 offers the second oil dripping hole 88, is provided with lubricating cup 7 below the rear side of exhaust fume collecting hood 1, the second oil dripping hole 88 is located at The top of lubricating cup 5, thus can receive the oil trap 63 in strainer 6 from the grease of 6 themselves capture of cabinet 2, blower fan system 4 and strainer It is interior, and the upper surface of smoke deflector 8 is dropped onto from the first oil dripping hole 64, hereafter dripped from the second oil dripping hole 88 of the rear end of smoke deflector 8 Fall in lubricating cup 7, to avoid pollution hearth or cooker.

Be provided with blower fan system 4 in cabinet 2, blower fan system 4 include two can independent operation 41 He of the first ternary wind turbine Second ternary wind turbine 42, two ternary fans in series are set., can be significantly compared to centrifugal blower by using 3 d impeller Increase flow efficiency, improve air quantity.

First ternary wind turbine 41 includes the first spiral case 411 and the first 3 d impeller 412 being arranged in the first spiral case 411, Second ternary wind turbine 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 Formed with the first air inlet 413 on 411, formed with the second air inlet 423, the top shape of the first spiral case 411 on the second spiral case 421 Into the first air outlet 414, the top of the second spiral case 421 forms the second air outlet 424.

First 3 d impeller 412 and the second 3 d impeller 422 can use the prior art, such as the Application No. of the applicant Structure disclosed in 201620102790.9 patent, two 3 d impellers are each independent, driven respectively with independent first Dynamic motor 431 and second drives motor 432.

First ternary wind turbine 41 (as first order wind turbine) and the second ternary wind turbine 42 (as second level wind turbine) are mutual respectively It is mutually independent, and be in horizontal arrangement, i.e., the air inlet of two ternary wind turbines is downward.Second ternary wind turbine 42 is located at first The top of ternary wind turbine 41, two ternary wind turbine arranged for interval.Oil smoke passes sequentially through the first ternary wind from exhaust fume collecting hood 1 into fashionable Machine 41 (upstream of oil smoke flow path) and the second ternary wind turbine 42 (downstream of oil smoke flow path).First ternary wind turbine 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 wind turbine 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 passage 25, oil smoke is sucked in air passage 25 of second air inlet 423 out of cabinet 2.

In the present embodiment, the first ternary wind turbine 41 and the second ternary wind turbine 42 are arranged in correspondence with each other, the first ternary wind turbine 41 the first air inlet 413 and the second air inlet 423 of the second ternary wind turbine 42, which can correspond to, (coaxially or same to hang down Nogata is upward), the second air outlet 414 of the first ternary wind turbine 41 and the second air outlet 424 of the second ternary wind turbine 42 can also Corresponding (coaxially or in same vertical direction).Kept necessarily between first air inlet 413 and the second air inlet 423 Distance, distance between the two and the first 3 d impeller 412 or the diameter of the second 3 d impeller 422 (two 3 d impellers are identical) Ratio 0.2~1.Suitable spacing is kept between two-stage wind turbine so that the exit flow of first order wind turbine can abundant diffusion, So that dynamic pressure switchs to static pressure, into second level wind turbine；But can not from it is too remote, otherwise lose the meaning of two fans series connection.

First air inlet 413 of the first ternary wind turbine 41 is maintained a certain distance with 25 entrance of air passage, between the two away from From 1~2 times for 412 diameter of the first 3 d impeller, the center of the first 3 d impeller 412 and the distance of 25 entrance of air passage must be big In the diameter of the first 3 d impeller 412, the rotary sieve 6 of such 25 inlet of air passage 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, realizes oil smoke and directly inhales 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, is just not required to per level-one rotation speed of fan It is so high, it can effectively reduce noise.

Embodiment two

Referring to Fig. 6 and Fig. 7, in the present embodiment, it is with the difference of above-described embodiment three, the first ternary wind turbine 41 (as first order wind turbine) and second ternary wind turbine 42 (as second level wind turbine) dislocation arrangement, i.e. the first spiral case 411 and second Spiral case 412 is in reversely, and the first air inlet 413 of the first ternary wind turbine 41 is close to right side, the second inlet air of the second ternary wind turbine 42 Mouth 423 is close to left side, and the second air outlet 414 of the first ternary wind turbine 41 is close to left side, the second outlet air of the second ternary wind turbine 42 Mouthfuls 424 close to right side, at this time the second air inlet of the first air outlet 414 of the first ternary wind turbine 41 and the second ternary wind turbine 42 423 corresponding in vertical direction or close correspondences.The distance between first air inlet 413 and the second air inlet 423 are Vertical Square Upward distance.

Embodiment three

Referring to Fig. 8 and Fig. 9, in the present embodiment, it is with the difference of above-described embodiment three, the first ternary wind turbine 41 Distinguish obliquely upper and lower arranged for interval, i.e. the first air inlet 413 and the level of the first ternary wind turbine 41 with the second ternary wind turbine 42 Inclinedly downward, the second air inlet 423 of the second ternary wind turbine 42 and horizontal direction are inclinedly downward in direction.

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

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

Claims (11)

1. a kind of range hood, including exhaust fume collecting hood (1), the cabinet (2) that is arranged on above exhaust fume collecting hood (1) and it is arranged on cabinet (2) Interior blower fan system (4), offers air inlet (11) on the exhaust fume collecting hood (1), formed with air passage (25) in the cabinet (2), It is characterized in that：The blower fan system (4) includes the first ternary wind turbine (41) and the second ternary wind turbine (42) being arranged in series, institute State the bottom in cabinet (2), the inlet of air passage (25) is provided with strainer (6), the strainer (6) include in it is up-small and down-big fall The strainer body (61) of taper, is densely covered with mesh (62) on the strainer body (61).

2. range hood according to claim 1, it is characterised in that：The edge of the strainer body (61) stretches out shape Into there is cricoid oil trap (63), the outer edge of the oil trap (63) is extended to outside the bottom of cabinet (2) and is bent up Folding.

3. range hood according to claim 1, it is characterised in that：Smoke deflector is provided with below air inlet (11) (8), the smoke deflector (8) lower surface at least a portion in be gradually inclined upwardly from centre to edge, thus with exhaust fume collecting hood (1) Corresponding wall coordinate and limit the acceleration channels that cross section from the bottom to top gradually decreases.

4. range hood according to claim 3, it is characterised in that：It is oblique that the lower surface of the smoke deflector (8) includes first At least one in face (81), the second inclined-plane (82) and the 3rd inclined-plane (83), first inclined-plane (81) is by middle court to the left The first acceleration channels (84) are formed between upper inclination and the left plate (13) of exhaust fume collecting hood (1), second inclined-plane (82) is by centre Tilt upward to the right and form the second acceleration channels (85), the 3rd inclined-plane between the right plate (14) of exhaust fume collecting hood (1) (83) the 3rd acceleration channels (86) are formed to front side towards between inclination and the front side board (15) of exhaust fume collecting hood (1) from centre.

5. range hood according to claim 4, it is characterised in that：Four corners of the upper surface of the smoke deflector (8) Connecting pole (87) is respectively arranged with, the connecting pole (87) is connected to the outer edge of the air inlet (11) of exhaust fume collecting hood (1), so that will Smoke deflector (8) is connected with exhaust fume collecting hood (1).

6. range hood according to claim 5, it is characterised in that：The connecting pole (87) is by motor-driven flexible Bar.

7. range hood according to claim 1, it is characterised in that：The first ternary wind turbine (41) includes the first ternary Impeller (412) and the first air inlet (413), the second ternary wind turbine (42) include the second 3 d impeller (422) and second into Air port (423), on oil smoke flow path, second air inlet (423) is located at the downstream of the first air inlet (413), described First air inlet (413) and the second air inlet (423) are towards identical direction.

8. range hood according to claim 7, it is characterised in that：First 3 d impeller (412) and the second 3 d impeller (422) diameter is identical, the distance between first air inlet (413) and the second air inlet (423) and the first 3 d impeller (412) ratio 0.2~1 of diameter.

9. range hood according to claim 7, it is characterised in that：First air inlet (413) and the second air inlet (423) it is in horizontal arrangement downward to be, the first air inlet (413) and air passage (25) entrance of the first ternary wind turbine (41) it Between distance be 1~2 times of the first 3 d impeller (412) diameter, center and the air passage (25) of first 3 d impeller (412) The distance of entrance is more than the diameter of the first 3 d impeller (412).

10. range hood according to claim 7, it is characterised in that：First air inlet (413) and the second air inlet (423) it is obliquely downward in tilting, the first air inlet (413) center and the air passage (25) of the first ternary wind turbine (41) Entrance between vertical range be 0.5~2 times of diameter of the first 3 d impeller (412).

11. range hood according to claim 10, it is characterised in that：First outlet air of the first ternary wind turbine (41) Pass through guide duct (46) between mouth (414) and the second air inlet (423) of the second ternary wind turbine (42) to connect.