CN207751033U - A kind of range hood - Google Patents

Abstract

The utility model discloses a kind of range hoods, including exhaust fume collecting hood, the cabinet and lampblack filter that are arranged above exhaust fume collecting hood, it is formed with air inlet on the exhaust fume collecting hood, it is formed with air duct in the cabinet, the lampblack filter includes the oil network being arranged in the air inlet, the oil network is in integrally taper that is up big and down small, being extended downwardly by air inlet, and blower fan system is provided in the cabinet, it is characterised in that：The blower fan system includes the first ternary wind turbine and the second ternary wind turbine being arranged in series, the lampblack filter further include be arranged in the cabinet, the rotary sieve of the inlet in air duct.By the way that oil network and rotary sieve is arranged, oil network can be to air-flow rectification and guiding, rotary sieve is conducive to air-flow and is evenly distributed in air inlet, therefore both combine can effectively rectification with guiding air-flow, reduce the turbulent flow and sinuous flow in air-flow, smooth-going air-flow is formed, the whirlpool that air-flow is formed before entering blower fan system is reduced.

Description

A kind of range hood

Technical field

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

Background technology

Range hood has become 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 generated 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, and it is in an increasingly wide range of applications.

Lampblack filter is an important component of range hood, and the technological improvement about lampblack filter is always One hot technology in range hood field.Existing range hood, meeting be to collect the oil smoke generated in cooking, flue dust etc. Purpose and filter screen is installed, a kind of smoke exhaust ventilator as disclosed in the Chinese patent application No. is 201310359754.1, including Oil cleaner screen, swab case and fan assembly are with swab case is arranged below oil cleaner screen, and oil smoke first passes around oil cleaner screen and carries out machinery Formula oil strain, the bulky grain grease filtered out can be fallen into swab case due to gravity；For another example application number 201610642513.1 Chinese patent disclosed in a kind of bionical filter screen on range hood, the cage cigarette in the host lower end of range hood is set At cover, and positioned at the air inlet of lubricating cup upper end, bionical filter screen is up big and down small or up-small and down-big cone or rectangular vertebra Body or the metal thin shell of square centrum.

In recent years, oil network multiple stratification, oil smoke gas channel are meandering has become a kind of technological trend.Such as application No. is A kind of oil guide structure of novel European type cooker hood disclosed in 201410013980.9 Chinese patent, including outer oil network and positioning The rack being set on the inside of the outer oil network, offer respectively in the outer oil network and rack several perforative first ventilation holes and Third venting hole, and it is all formed with Oil Guide groove on the periphery of several first ventilation holes, the opening of several Oil Guide grooves is all Towards inside range hood, and several Oil Guide grooves also connect to form the dynamic path of a fuel feeding drip, and in outer oil network and Also positioning is provided with the flat interior oil network of polylith between rack；For another example application No. is the Chinese patent of 201621013691.X public affairs The compound guard of a kind of kitchen ventilator opened, including guard ontology, guard ontology include side and bottom, and side is integrally formed with a circle The boss of interval setting and ecto-entad protrusion, boss are arranged in strip structure and one end in side upper end-face edge, the other end Setting constituted oil groove between side lower edge, adjacent two boss of lateral interior surfaces, and gather several mesh at the top of boss.

The vent area of the oil network of these existing multilayers, average each layer of oil network accounts for the ratio of this layer of oil network gross area Maximum does not exceed 50%.And vent area accounts for the ratio of the oil network gross area, will have a direct impact on the smoke evacuation effect of range hood Rate and noise level.And multilayer oil network is only leaned on, enough filtering and rectification can not be played the role of.Therefore, it need It is further improved.

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 raising Fume-exhausting efficiency, the range hood for reducing noise.

Technical solution is used by the utility model solves above-mentioned technical problem：A kind of range hood, including exhaust fume collecting hood, The cabinet and lampblack filter being arranged above exhaust fume collecting hood are formed with air inlet on the exhaust fume collecting hood, are formed in the cabinet Have an air duct, the lampblack filter includes the oil network being arranged in the air inlet, the oil network be in integrally it is up big and down small, by The taper that air inlet extends downwardly is provided with blower fan system in the cabinet, it is characterised in that：The blower fan system includes string Join the first ternary wind turbine and the second ternary wind turbine of setting, the lampblack filter further includes being arranged in the cabinet, wind The rotary sieve of the inlet in road.

For ease of carrying out water conservancy diversion to oil smoke so that soot gas smoothly enters range hood, utmostly reinforces The fume-exhausting ability of range hood, and ensure enough incoming air areas, and it is avoided that oil droplet directly drops onto on hearth, it is described Oil network includes internal layer oil network and the outer layer oil network in internal layer oil network periphery is arranged, and the internal layer oil network includes inner layer net ontology and opens The first ventilation hole being located on inner layer net ontology, the outer layer oil network include outer layer net ontology and are opened on outer layer net ontology Second ventilation hole, first ventilation hole are less than the second ventilation hole, and first ventilation hole and the second ventilation hole interlaced arrangement make The orthographic projection obtained in same level is partly overlapped.

For reduce oil smoke by noise, ensure enough incoming air areas, and can ensure that preferable filter effect, described the One ventilation hole assumes diamond in shape, and the length of first ventilation hole is 1.0~2.0mm, width is 1.0mm~2.0mm, arbitrary neighborhood two Most short side between a first ventilation hole is away from for 0.3~0.6mm.

Preferably, for ease of the setting of rotary sieve, the rotary sieve includes for the Dropbox of filtering fume excessively and being used for The motor of Dropbox rotation, the output shaft of the motor is driven to be inserted into the center of Dropbox and be connected and fixed, the motor passes through electricity Machine support is connected and fixed with cabinet.

To promote the rigidity of Dropbox, filter effect is promoted as much as possible, is offered along center pair on the surface of the Dropbox The slot of arc for claiming and being arranged in array, each slot is radially extended along Dropbox, and the slot at least divides along the radial direction of Dropbox It is furnished with two layers.

To make oil smoke with minimum flow velocity by rotary sieve, the time to contact with each other between the two is longer, to reach To preferable filter effect, the air duct is in diminishing shape from the bottom to top.

To avoid the grease of cabinet and wind turbine from dropping onto below range hood, in the cabinet, it is located at below rotary sieve It is provided with oil drain pan.

For ease of accepting the grease thrown away along case side wall drippage, wind turbine, the oil drain pan includes disk ontology, the disk The shape of ontology, the cross-section adaptation of size and cabinet, and the edge of disk ontology is located at the lower section of cabinet and extends cabinet Bottom edge and be supported below the air inlet edge of exhaust fume collecting hood.

For ease of guiding oil smoke air-flow, the intermediate of the disk ontology to form opening, the disk ontology prolongs upwards in opening It stretches certain distance and forms diversion division, the diversion division is opposite with rotary sieve, and the edge of the rotary sieve exceeds diversion division.

On the basis of not changing Cabinet Size, 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 The downstream that the second air inlet is located at the first air inlet, first air inlet and the second air inlet are stated towards identical direction.

To enable the abundant diffusion of the 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 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, first air inlet and the second air inlet are downward in horizontal cloth It sets, 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 Times, the center of first 3 d impeller is more than the diameter of the first 3 d impeller at a distance from tunnel inlet.

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 duct is the first 3 d impeller 0.5~2 times of diameter.

To promote 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：It can be right by the way that oil network and rotary sieve, oil network is arranged Air-flow rectification and guiding, rotary sieve is conducive to air-flow and is evenly distributed in air inlet, therefore the two combination can be effectively whole Stream and guiding air-flow, reduce the turbulent flow and sinuous flow in air-flow, form smooth-going air-flow, reduce air-flow and formed before entering blower fan system Whirlpool；By the way that double-deck oil network is arranged, since the ventilation hole of two layers of oil network shifts to install, the oil of intracavitary drippage can be blocked Drop so that oil droplet will not be dropped onto directly on hearth, by limiting the arrangement mode of internal layer mesh and size, the mesh of mesh Between spacing, ensure that the incoming air area of oil network, outer layer oil network play guide functions for soot gas so that soot gas is more Swimmingly enter range hood；Rotary sieve is arranged at the tunnel inlet in cabinet, oil smoke can be made with lower stream For speed by rotary sieve, the time to contact with each other between the two is longer, and oil smoke can be made fully to be collided with rotary sieve, from And reach preferable filter effect.

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 oil network of the range hood of the utility model embodiment；

Fig. 5 is the decomposition texture schematic diagram of the oil network of Fig. 4；

Fig. 6 is the schematic diagram of the rotary sieve of the range hood of the utility model embodiment；

Fig. 7 is the schematic diagram of the oil drain pan of the range hood of the utility model embodiment.

Fig. 8 is the schematic diagram of second embodiment of range hood of the utility model；

Fig. 9 is the sectional view of second embodiment of range hood of the utility model；

Figure 10 is the schematic diagram of the range hood third embodiment of the utility model；

Figure 11 is the sectional view of the range hood third embodiment of the utility model.

Specific implementation mode

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

Embodiment one

Referring to Fig. 1~Fig. 3, a kind of range hood, including exhaust fume collecting hood 1, the cabinet 2 that is arranged above 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, the blower fan system 4 in cabinet 2 can aspirate oil smoke as a result, It is discharged into common flue after entering cabinet 2 by air inlet 11.

Air duct 25 is formed in cabinet, air duct 25 is preferably gradually reduced from the bottom to top.

Blower fan system 4 in cabinet 2 uses ternary wind turbine, and the prior art can be used, as the applicant application No. is The air outlet of blower fan structure disclosed in 201620102790.9 patent, blower fan system 4 is provided with outlet housing 5, and being used for will The oil smoke discharge that blower fan system 4 is discharged is to wind pipe.The concrete structure of blower fan system 4 will be explained below.

Range hood further includes lampblack filter, in the present embodiment, is filtered using twice, includes the oil positioned at upstream Net 8 and rotary sieve 6 positioned at downstream.Wherein, rotary sieve 6 is arranged in cabinet 2, positioned at the lower section of blower fan system 4, is located at Bottom in cabinet 2.That is, rotary sieve 6 is arranged in the inlet in above-mentioned air duct 25, and air duct 25 is gradual from the bottom to top It reduces, is then also accelerated without air duct 25 by the oil smoke of rotary sieve 6, at this point, oil smoke is filtered with minimum flow velocity by rotating Net 6, the time to contact with each other between the two is longer, and oil smoke can be made fully to be collided with rotary sieve 6, preferable to reach Filter effect.

The needs of rotary sieve 6 are maintained a certain distance with blower fan system 4, to ensure that oil smoke passes through rotation with lower flow velocity Strainer 6, to fully be filtered, after rotary sieve 6 carries out brokenly whirlpool to oil smoke so that the flowing that oil smoke passes through certain distance Path side reaches blower fan system 4, to ensure that it is smooth that oil smoke sufficiently achieves；It between the two again cannot be apart from too far, otherwise rotation filter Net 6 is by the greatest limit of the negative pressuren zone beyond blower fan system 4.Structure about rotary sieve 6 will be explained below.

Oil network 8 is then arranged to be set at air inlet 11, and the bottom of oil network 8 is provided with lubricating cup 9.Oil network 8 is whole in up big and down small Taper, extended downwardly by air inlet 11.Referring to Fig. 2, Fig. 4 and Fig. 5, oil network 8 includes internal layer oil network 81 and is arranged in internal layer The outer layer oil network 82 of 81 periphery of oil network, internal layer oil network 81 and outer layer oil network 82 are in up big and down small taper.

Internal layer oil network 81 includes inner layer net ontology 811 and the first ventilation hole 812 being opened on inner layer net ontology 811, In the present embodiment, the first ventilation hole 812 assumes diamond in shape, the noise generated when reducing oil smoke across internal layer oil network 81, not by size Uniform grease molecules water conservancy diversion is at grease molecules of uniform size, in order to the preferably oil removing of rotary sieve 6 of rear end.Inner layer net The thickness of ontology 81 is preferably 0.3~1mm, the length of the first ventilation hole 812 is 1.0~2.0mm, width (in diagonal line compared with Short one length) be 1.0mm~2.0mm, the most short side between two the first ventilation holes 812 of arbitrary neighborhood away from for 0.3~ Thus 0.6mm both ensure that the incoming air area of internal layer oil network 81, also ensure that preferable filter effect.

Outer layer oil network 82 includes outer layer net ontology 821 and the second ventilation hole 822 being opened on outer layer net ontology 821.Outside Layer net ontology 821 has there are four side wall, is to be in tilted layout, and the water conservancy diversion of four direction can be carried out to oil smoke so that cooking fume Body smoothly enters range hood, utmostly reinforces the fume-exhausting ability of range hood.Second ventilation hole 822 be it is upper, The rectangle or ellipse of lower extension, width is 6mm~10mm, most short between two the second ventilation holes 822 of arbitrary neighborhood Back gauge is 2mm~5mm.

821 interlaced arrangement of first ventilation hole 811 and the second ventilation hole, i.e. the first ventilation hole 811 and the second ventilation hole 821 exist Orthographic projection in same level is partly overlapped, and forms overlapping portion, and two kinds of ventilation holes is of different sizes, and be staggered part increase Oil smoke traps area, and lap can then block the oil droplet dripped inside range hood so that oil droplet will not directly drip It falls on hearth.

The oil smoke in negative suction area is first contacted with oil network 8 before entering air intake passage, so that bulky grain grease is attached to interior In layer oil network 81, prevent bulky grain grease from entering range hood.Oil network 8 is under high-speed flow, superposition and two layers of oil network staggeredly The separating for several times elaioleucites such as condensation, rectification, shock are formed, oil smoke absorbs cleaner.

Rotary sieve 6 includes the Dropbox 61 for crossing filtering fume and the motor 62 for driving Dropbox 61 to rotate.Referring to Fig. 2 And Fig. 6, the slot 611 of the arc along central symmetry and array arrangement is offered on the surface of Dropbox 61, slot 611 is perforation Dropbox 61 Straight slot, at least two layers of 611 array of slot can be radially set on the surface of Dropbox 61, since oil smoke is into draught fan impeller Flue gas is influenced in the concentration distribution of circumference by the rotating speed of wind turbine, the type of impeller and inlet and outlet angular dimensions before, and layering is set After meter, the rigidity of Dropbox 61 is on the one hand improved, it on the other hand, can be dense according to practical flue gas after specific selected blower fan system Distribution character is spent, every layer of slot 611 can be more freely distributed and arrive best width dimensions, without the shadow by other layer of slot 611 It rings, promotes filter effect as much as possible.

611 array of slot is arranged to centrosymmetric annular shape, and each slot 611 radially extends, bending direction and arc Degree is preferably consistent.The slot 611 for radially extending and having certain radian by setting, after grease and the contact of Dropbox 61, It can compare and successfully flow from inside to outside, and realize that the grease of higher efficiency centrifuges after obtaining the centrifugal force of bigger.

Motor 62 is arranged in the top of Dropbox 61, and the output shaft 621 of motor 62 is inserted into the center of Dropbox 61 and company Fixation is connect, thus motor 62 can drive Dropbox 61 to rotate.The arranged on left and right sides of motor 62 passes through electric machine support 622 and cabinet 2 respectively Left side wall and right side wall be connected and fixed, as a result, complete rotary sieve 6 installation.

The bottom end of cabinet 2 extends at the air inlet 11 of exhaust fume collecting hood 1, and is set in cabinet 2, positioned at 6 lower section of rotary sieve It is equipped with oil drain pan 7, referring to Fig. 7, oil drain pan 7 includes disk ontology 71 and diversion division 72, shape, size and the cabinet 2 of disk ontology 71 Cross-section adaptation, be arranged in cabinet 2 to horizontal or almost horizontal, and the edge of disk ontology 71 be located at cabinet 2 lower section, And bottom edge beyond cabinet 2 and be supported below 11 edge of air inlet of exhaust fume collecting hood 1.The oil dripped in cabinet 2 as a result, The grease that fat, blower fan system 4 are thrown away can drop on disk ontology 71.Each side in the air duct 25 of cabinet 2 is inclined, contributes to Oil under blower fan system 4 is got rid of is imported on disk ontology 71.

The intermediate of disk ontology 71 forms opening 711, and disk ontology 71 extends a distance up to form water conservancy diversion at opening 711 Portion 72, diversion division 72 is opposite with the Dropbox 61 of rotary sieve 6, and the cross section of opening 711 and diversion division 72 may be circle, and And the edge of Dropbox 61 can exceed diversion division 72 so that the grease that rotary sieve 6 is thrown away can also drop on disk ontology 71, simultaneously Diversion division 72 also can play the role of water conservancy diversion to the oil smoke entered from exhaust fume collecting hood 1.

Referring back to Fig. 2 and Fig. 3, in the present embodiment, blower fan system 4 include two can independent operation the first ternary wind turbine 41 and the second ternary wind turbine 42, two ternary fans in series settings.It, can be with compared to centrifugal blower by using 3 d impeller Flow efficiency is significantly increased, improves air quantity.

The first 3 d impeller 412 that first ternary wind turbine 41 spiral case 411 and be arranged in the first spiral case 411 including first, The second 3 d impeller 422 that second ternary wind turbine 42 spiral case 421 and be arranged in the second spiral case 421 including second.First spiral case It is formed with the first air inlet 413 on 411, the second air inlet 423, the top shape of the first spiral case 411 are formed on the second spiral case 421 At the first air outlet 414, the top of the second spiral case 421 forms the second air outlet 424.

The prior art can be used in first 3 d impeller 412 and the second 3 d impeller 422, as the applicant application No. is Structure disclosed in 201620102790.9 patent, two 3 d impellers are respectively independent, are respectively provided with independent first and drive 431 and second driving motor 432 of dynamic motor.

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 duct 25, oil smoke is sucked in air duct 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 Histogram 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 the same vertical direction).It is kept centainly 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 far, otherwise lose the concatenated meaning of two fans.

First air inlet 413 of the first ternary wind turbine 41 is maintained a certain distance with 25 entrance of air duct, 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 must be big at a distance from 25 entrance of air duct It can just be played a role in the rotary sieve 6 of the diameter of the first 3 d impeller 412,25 inlet of such air duct, but 2 can not be more than Times diameter, otherwise apart from negative pressure region apart from too far.

The mode of this arranged in series realizes oil smoke and directly inhales in line, improves static pressure, promote range hood effect；Two Grade blower fan filtering, increases 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.

By the way that oil network 8 and rotary sieve 6 is arranged, oil network 8 can be conducive to gas to air-flow rectification and guiding, rotary sieve 6 Stream is evenly distributed in air inlet, thus the two combine can effectively rectification and guiding air-flow, reduce turbulent flow in air-flow and Sinuous flow forms smooth-going air-flow, reduces the whirlpool that air-flow is formed before entering blower fan system 4.

Embodiment two

Referring to Fig. 8 and Fig. 9, in the present embodiment, with above-described embodiment three the difference is that, 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 air inlet 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 and the second ternary wind turbine 42 of the first ternary wind turbine 41 423 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 Figure 10 and Figure 11, in the present embodiment, with above-described embodiment three the difference is that, the first ternary wind turbine 41 and the second obliquely upper and lower arranged for interval respectively of ternary wind turbine 42, i.e. the first air inlet 413 and water of the first ternary wind turbine 41 Square to inclined downward, the second air inlet 423 of the second ternary wind turbine 42 and horizontal direction be inclinedly downward.

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 duct 25 is 0.5~2 times of the diameter of first 3 d impeller 412.

The wind turbine whole height of this tilting series system, 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 (14)

1. a kind of range hood includes the cabinet (2) and lampblack filter of exhaust fume collecting hood (1), setting above exhaust fume collecting hood (1), It is formed with air inlet (11) on the exhaust fume collecting hood (1), air duct (25), the lampblack filter are formed in the cabinet (2) Including the oil network (8) being arranged at the air inlet (11), the oil network (8) is in integrally up big and down small, by air inlet (11) The taper extended downwardly, the cabinet (2) is interior to be provided with blower fan system (4), it is characterised in that：The blower fan system (4) includes The the first ternary wind turbine (41) and the second ternary wind turbine (42) being arranged in series, the lampblack filter further include being arranged described The rotary sieve (6) of interior, air duct (25) the inlet of cabinet (2).

2. range hood according to claim 1, it is characterised in that：The oil network (8) includes internal layer oil network (81) and sets The outer layer oil network (82) in internal layer oil network (81) periphery is set, the internal layer oil network (81) includes inner layer net ontology (811) and opens up The first ventilation hole (812) on inner layer net ontology (811), the outer layer oil network (82) include outer layer net ontology (821) and open The second ventilation hole (822) being located on outer layer net ontology (821), first ventilation hole (812) are less than the second ventilation hole (822), first ventilation hole (812) and the second ventilation hole (822) interlaced arrangement make the orthographic projection in same level Partly it is overlapped.

3. range hood according to claim 2, it is characterised in that：First ventilation hole (812) assumes diamond in shape, and described The length of one ventilation hole (812) is 1.0~2.0mm, width is 1.0mm~2.0mm, two the first ventilation holes of arbitrary neighborhood (812) most short side between is away from for 0.3~0.6mm.

4. range hood according to claim 1, it is characterised in that：The rotary sieve (6) includes being used for filtering fume Dropbox (61) and motor (62) for driving Dropbox (61) to rotate, the output shaft (621) of the motor (62) is inserted into net The center of disk (61) and be connected and fixed, the motor (62) is connected and fixed by electric machine support (622) and cabinet (2).

5. range hood according to claim 4, it is characterised in that：It is offered along center on the surface of the Dropbox (61) The slot (611) of arc that is symmetrical and being arranged in array, each slot (611) radially extending along Dropbox, and the slot (611) edge The radial direction of Dropbox (61) is at least distributed with two layers.

6. range hood according to claim 4, it is characterised in that：The air duct (25) is in diminishing from the bottom to top Shape.

7. range hood described in any one of claim 1 to 3, it is characterised in that：In the cabinet (2), it is located at rotation Turn to be provided with oil drain pan (7) below strainer (6).

8. range hood according to claim 7, it is characterised in that：The oil drain pan (7) includes disk ontology (71), described The shape of disk ontology (71), the cross-section adaptation of size and cabinet (2), and the edge of disk ontology (71) is located at cabinet (2) Simultaneously extend the bottom edge of cabinet (2) and be supported below air inlet (11) edge of exhaust fume collecting hood (1) in lower section.

9. range hood according to claim 8, it is characterised in that：The intermediate of the disk ontology (71) forms opening (711), the disk ontology (71) extends a distance up to form diversion division (72), the diversion division at opening (711) (72) relatively with rotary sieve (6), the edge of the rotary sieve (6) exceeds diversion division (72).

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

11. range hood according to claim 10, it is characterised in that：First 3 d impeller (412) and the second ternary leaf The diameter for taking turns (422) is identical, the distance between first air inlet (413) and the second air inlet (423) and the first ternary leaf Take turns the ratio 0.2~1 of the diameter of (412).

12. range hood according to claim 10, it is characterised in that：First air inlet (413) and the second air inlet Mouth (423) is downward in horizontal arrangement, the first air inlet (413) and air duct (25) entrance of the first ternary wind turbine (41) The distance between be 1~2 times of the first 3 d impeller (412) diameter, the center and air duct of first 3 d impeller (412) (25) distance of entrance is more than the diameter of the first 3 d impeller (412).

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

14. range hood according to claim 13, 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.