CN207230685U - 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 exhaust fume collecting hood, smoke deflector is provided with below air inlet, blower fan system includes the first ternary wind turbine and the second ternary wind turbine that are arranged in parallel, lower surface at least a portion of smoke deflector in be gradually inclined upwardly from centre to edge, thus wall corresponding to exhaust fume collecting hood coordinates and limits the acceleration channels that cross section from the bottom to top gradually decreases.It can increase the amount entered in the oil smoke unit interval inside range hood by acceleration channels, lift smoke absorption effect, pass through the rotary sieve set at tunnel inlet, so that oil smoke with without air passage accelerate before rotary sieve is passed through with relatively low flow velocity, the time to contact with each other between the two is longer, and oil smoke can be caused fully to be collided with rotary sieve.

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, is located at Smoke deflector is provided with below air inlet, it is characterised in that：The blower fan system includes the first ternary wind turbine for being arranged in parallel and the Two ternary wind turbines, lower surface at least a portion of the smoke deflector are in gradually to be inclined upwardly from centre to edge, thus with collecting cigarette The corresponding wall of cover coordinates and limits the acceleration channels that cross section from the bottom to top gradually decreases.

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.

Preferably, to further improve the acceleration of acceleration channels, the interior table of the left plate, right plate and front side board Face is also in gradual intilted inclined-plane from the bottom to top.

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.

Preferably, for ease of filtering, the cabinet is interior formed with air passage, and the cabinet is interior, the inlet in air passage is provided with Rotary sieve, the rotary sieve include being used for the Dropbox of filtering fume and for driving the rotating motor of Dropbox, the motor Output shaft be inserted into the center of Dropbox and connect fixation, the motor is connected fixation with cabinet by electric machine support.

To lift the rigidity of Dropbox, filter effect is lifted as much as possible, is offered on the surface of the Dropbox along center pair Claim and be in array arrangement arc groove, each groove is radially extended along Dropbox, and the groove at least divides along the radial direction of Dropbox It is furnished with two layers.

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 second air inlet with the first air inlet position to be equal, first air inlet and the second air inlet are set up in parallel and difference Towards 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 wind turbine, the second 3 d impeller of the second ternary wind turbine respectively from the horizontal by 60 °~90 °, and And two 3 d impellers tilt in the opposite direction.

One side according to the present utility model, the first ternary wind turbine further include the first spiral case, first ternary Impeller is arranged in the first spiral case, and the second ternary wind turbine further includes the second spiral case, and second 3 d impeller is arranged on In two spiral cases, first spiral case and the second spiral case interval, be arranged side by side, and first air inlet is formed in the first spiral case On, second air inlet is formed on the second spiral case, formed with the first oil smoke passage, first oil in first spiral case The top of cigarette channel forms the first air outlet, and second spiral case is interior formed with the second oil smoke passage, the second oil smoke passage Top formed the second air outlet.

Between other side according to the present utility model, the first 3 d impeller and the second 3 d impeller are in same spiral case Every, be arranged side by side, the first air inlet corresponding with the first 3 d impeller, with corresponding second inlet air of the second 3 d impeller Mouth is respectively formed at the opposite both sides of spiral case, is provided with installing plate between first 3 d impeller and the second 3 d impeller, institute The top that installing plate extends to spiral case is stated, is led to so that two independent the first oil smoke passages and the second oil smoke will be separated into spiral case Road, the top of the first oil smoke passage form the first air outlet, and the top of the second oil smoke passage forms the second air outlet.

For ease of driving two impellers at the same time, the drive being arranged between the first 3 d impeller and the second 3 d impeller is further included Dynamic motor, the driving motor have the double output shaft for being respectively used to the first 3 d impeller of driving and the second 3 d impeller.

Gas accordingly to be exported to two ternary wind turbines plays guide functions, is conducive to exit gas and forms laminar flow, from And flow losses are greatly lowered, efficiency is improved, outlet housing, the outlet housing bag are provided with the air outlet of the blower fan system The cover body in hollow tube-shape is included, the cover body has the first end and second end of opposite opening, and the bore of the first end is big In the bore of second end, it is characterised in that：Be provided with the first deflector and the second deflector in the cover body, each deflector from The first end of cover body extends to second end, and the first diffusion runner, institute are formed between the madial wall of first deflector and cover body State and the second diffusion runner is formed between the second deflector and the madial wall of cover body, the first diffusion runner and the second diffusion runner Sectional area be gradually reduced respectively by first end to the second end of cover body, the first diffusion runner at the first end of cover body with First air outlet of the first ternary wind turbine corresponds to, the second diffusion runner at the first end of cover body with the second ternary wind turbine Second air outlet corresponds to.

Noise is exported to reduce, sound-absorbing hole is densely covered with first deflector and/or the second deflector.

Compared with prior art, the utility model has the advantage of：By setting the smoke deflector with inclined lower surface, with Exhaust fume collecting hood collectively forms oil smoke acceleration channels, can increase the amount entered in the oil smoke unit interval inside range hood, and lifting is inhaled Oil smoke effect；By setting rotary sieve at the tunnel inlet in cabinet, oil smoke can be caused with before accelerating without air passage With relatively low flow velocity by rotary sieve, the time to contact with each other between the two is longer, oil smoke can be filled with rotary sieve Divide ground collision, while rectified action is played to the oil smoke of process, and rectification is completed by longer air passage, so as to reach preferable Filter effect；By using two ternary wind turbines, blower fan structure is compact, and size is relatively small, and fan efficiency and wind pressure are high, produce Suction gradient it is big, can so that smoking efficiency significantly lifted；This mode being arranged in juxtaposition is particularly suitable for top suction type oil suction Smoke machine, the wind turbine overall volume formed after in parallel are smaller, it is not necessary to change the original size of cabinet, keeping the situation of higher wind pressure It is lower to cause that air quantity is double, improves fume-exhausting efficiency again；Two air inlets are respectively facing arranged on left and right sides so that two side peripheries Negative pressure region area increases, and suitable for two kitchen ranges, reaches the effect for not running cigarette, noise transmission path subtracts not towards user Small noise.

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 of the range hood of Fig. 1；

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

Fig. 4 is that the cabinet of the range hood of Fig. 1 hides the schematic diagram of front side wall；

Fig. 5 is the schematic diagram of the smoke deflector of the range hood of Fig. 1；

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

Fig. 7 is the sectional view of the blower fan system of the range hood of Fig. 1；

Fig. 8 is the schematic diagram of the outlet housing of the range hood of Fig. 1；

Fig. 9 is the schematic diagram of second embodiment of blower fan system of the range hood of the utility model；

Figure 10 is the sectional view of second embodiment of blower fan system of the 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, be provided with rotary sieve 6 positioned at the lower section of blower fan system 4, and rotary sieve 6 be arranged on it is above-mentioned each The lower section of silencing apparatus, the bottom in cabinet 2.That is, rotary sieve 6 is arranged on the inlet in above-mentioned air passage 25, And air passage 25 is gradually reduced from the bottom to top, then also accelerated by the oil smoke of rotary sieve 6 without air passage 25, at this time, oil smoke with For minimum flow velocity by rotary sieve 6, the time to contact with each other between the two is longer, and oil smoke can be caused to be filled with rotary sieve 6 Divide ground collision, so as to reach preferable filter effect.

Rotary sieve 6 needs to maintain a certain distance with blower fan system 4, with ensure oil smoke with relatively low flow velocity (relative to Oil smoke after air passage 25 accelerates, oil smoke flow velocity at this time are relatively low) by rotary sieve 6, so as to fully be filtered, revolve After turning strainer 6 to oil smoke progress rectification so that oil smoke reaches blower fan system 4 by the flow path side of certain distance, to ensure Oil smoke sufficiently achieves smooth；Between the two again cannot be away from too far away, otherwise rotary sieve 6 is by beyond the negative pressuren zone of blower fan system 4 Greatest limit.

Rotary sieve 6 includes being used for the Dropbox 61 of filtering fume and for driving the rotating motor 62 of Dropbox 61.Referring to figure 5, the groove 611 of the arc along central symmetry and array arrangement is offered on the surface of Dropbox 61, referring to Fig. 6, groove 611 is perforation net The straight slot of disk 61, at least two layers of 611 array of groove can be radially set on the surface of Dropbox 61, since oil smoke is into wind turbine Flue gas is influenced in the concentration distribution of circumference be subject to the rotating speed of wind turbine, the species of impeller and inlet and outlet angular dimensions before impeller, point After layer design, the rigidity of Dropbox 61 is on the one hand improved, on the other hand, can be after specific selected blower fan system according to actual cigarette Gas concentration distribution character, can more freely be distributed every layer of groove 611 and arrive optimal width dimensions, without by other layer of groove 611 Influence, lift filter effect as much as possible.

611 array of groove is arranged to centrosymmetric annular shape, and each groove 611 radially extends, its bending direction and arc Degree is preferably consistent.By setting the groove 611 radially extended and with certain radian, after grease is contacted with 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 on 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 21, right side wall 22 connection fix, thus, complete rotary sieve 6 installation.

The rear end of smoke deflector 8 offers oil dripping hole 88, is provided with lubricating cup 7 below the rear side of exhaust fume collecting hood 1, oil dripping hole 88 is located at The top of lubricating cup 7, thus can receive the upper table in smoke deflector 8 from the grease of cabinet 2, blower fan system 4 and rotary sieve 6 drippage Face, and dropped onto from the oil dripping hole 88 of the rear end of smoke deflector 8 in lubricating cup 7, to avoid pollution hearth or cooker.

Referring to Fig. 7 and Fig. 8, in the present embodiment, blower fan system 4 include two can independent operation the first ternary wind turbine system 41 and second ternary blower fan system 42 of system, two ternary fan parallel-connections are set.By using 3 d impeller, compared to centrifugation wind Machine, can be significantly increased flow efficiency, improve air quantity.

First ternary blower fan system 41 includes the first spiral case 411 and the first 3 d impeller being arranged in the first spiral case 411 412, the second ternary blower fan system 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 the second spiral case 421 side by side, compartment of terrain arrangement, formed with the first air inlet 413 on the first spiral case 411, second Formed with the second air inlet 423 on spiral case 421, the air inlet of two spiral cases away from each other, i.e. the air inlet of the first spiral case 411 313 are formed in the side away from the second spiral case 421, two back-to-back settings of spiral case so that two ternary wind turbines in it is left and right side by side Arrangement, and the 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 from collection cigarette Cover 1 is entered in blower fan system 4 from arranged on left and right sides into fashionable respectively.The first oil smoke passage 441 is formed in first spiral case 411, The first air outlet 414 of top formation of first oil smoke passage 441,421 the second oil smoke passage 442 of interior formation of the second spiral case, second 442 top of oil smoke passage 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 the 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 is driven, driving motor 43 is arranged between the first spiral case 411 and the second spiral case 421, and driving motor 43 has dual output Axis, 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 wind turbines have preferable synchronism, while can save the energy again.

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 25 entrance of air passage 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 25 entrance of air passage maintains a certain distance, which is 1~2 times of the diameter of the second 3 d impeller 422, impeller center and air passage The distance of 25 entrances have to be larger than impeller diameter, and the rotary sieve 6 of such 25 inlet of air passage 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 wind turbine, can use same structure, and this arrangement, blower fan system overall volume It is smaller, 2 original size of cabinet can not changed, again can be so that air quantity to be double in the case where keeping higher wind pressure, raising is inhaled 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 A kitchen range, reaches 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 reduces 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 ternary blower fan system 41 First air outlet 414 of the first spiral case 411, the second air outlet 424 of the second spiral case 421 of the second ternary blower fan system 42, simultaneously 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 opposite first end 511 (lower end) and second end 512 (upper end) opening, the bore of first end 511 are more than second end 512 bore, that is, be open and be 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 from First end 511 is entered in cover body 51, and leaves cover body 51 into the external pipe being connected with outlet housing 5 from 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 second end 512, and the first deflector 521 at the first end 511 of cover body 51, with the first ternary blower fan system First edge 415 (first of the second air outlet 424 close to the second ternary blower fan system 42 at 41 the first air outlet 414 The right edge of air outlet) it is corresponding, the second deflector 522 at the first end 511 of cover body 51, with the second ternary blower fan system 42 The second air outlet 424 at close to the second edge 425 of the first air outlet 414 of the first ternary blower fan system 41, (second goes out The left side edge in air port) it is corresponding.Each deflector has the width extended in front and rear direction.First deflector 521 is by first End 511 to second end 512, be increasingly towards the second deflector 522 (to the right) and tilt, the second deflector 522 is by first end 511 to the Two ends 512, be increasingly towards the first deflector 521 and tilt (to the left), i.e., each deflector deviate from 51 bottom of cover body among position Put the position extension to 51 crown center of cover body.The top of first deflector 521 and the second deflector 522 is (close to cover body 51 Second end 512) interconnect, 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 531,51 madial wall of cover body 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 system 41 at the first end 511 of body 51, that is, the first air outlet is completely covered 414, the second diffusion runner 532 is right with the second air outlet 424 of the second ternary blower fan system 42 at the first end 511 of cover body 51 Should, that is, the second air outlet 424 is completely covered.The sectional area of first diffusion runner 531 is gradual to second end 512 by first end 511 Reducing, sectional area first end 511 to the second end 512 of the second diffusion runner 532 is gradually reduced, thus, the first diffusion runner 531 The muzzle velocity at top is more than the muzzle velocity of 531 bottom of the first diffusion runner, the muzzle velocity at the top of the second diffusion runner 532 More than the muzzle velocity of 532 bottom of the second diffusion runner.

By setting above-mentioned deflector so that connected with the first air outlet 414 of the first ternary blower fan system 41 The gas velocity of one diffusion runner 531, the second diffusion runner 42 connected with the second air outlet 424 of the second ternary blower fan system 42 Spend closer to each other.This guide functions of outlet housing 5 are conducive to exit gas and form laminar flow, enter extension tube attached after forming laminar flow Road, avoids the defects of being directly entered external pipe after air-flow comes out from spiral case with turbulent condition, it also avoid two ternary wind Strong friction and shock during the air outlet air-flow mixing of machine, so that flow losses be greatly lowered, improves 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 partition plate 55 so that Space between first deflector 521 and the second deflector 522 is divided at least two resonant cavities 551.Alternatively, can also be Space between first deflector 521 and the second deflector 522 sets acoustical cotton.Alternatively, partition plate can also be replaced with reinforcing rib 55, to strengthen the intensity of deflector.

Embodiment two

Referring to Fig. 9 and Figure 10, in the present embodiment, it is with the difference of above-described embodiment one, the first ternary wind turbine 41 and second ternary blower fan system 42 of system shares the first 3 d impeller of same spiral case 44, i.e. the first ternary blower fan system 41 412 and second second 3 d impeller 422 of ternary blower fan system 42 be co-located in same spiral case 44.

Installing plate 45 is provided between two 3 d impellers, so as to separating two 3 d impellers the two of installing plate 45 Side, installing plate 45 extend to the top of spiral case 44, so that two independent 441 Hes of the first oil smoke passage will be separated into spiral case 44 Second oil smoke passage 442.Driving motor 43 passes through from installing plate 45 and is connected fixation 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 45 phase of installing plate of deflector 56 It is corresponding, so that cover body 51 be divided into and corresponding the first independent diffusion runner 531 of 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.

Claims (14)

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), is provided with below air inlet (11) and leads cigarette Plate (8), it is characterised in that：The blower fan system (4) includes the first ternary wind turbine (41) and the second ternary wind turbine being arranged in parallel (42), 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 coordinates and limits the acceleration channels that cross section from the bottom to top gradually decreases.

2. range hood according to claim 1, 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.

3. range hood according to claim 2, it is characterised in that：The left plate (13), right plate (14) and front side The inner surface of plate (15) is also in gradual intilted inclined-plane from the bottom to top.

4. range hood according to claim 1, 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).

5. range hood according to claim 4, it is characterised in that：The connecting pole (87) is by motor-driven flexible Bar.

6. range hood according to claim 1, it is characterised in that：It is described formed with air passage (25) in the cabinet (2) Bottom, the inlet of air passage (25) in cabinet (2) are provided with rotary sieve (6), and the rotary sieve (6) includes being used to filter The Dropbox (61) of oil smoke and for driving Dropbox (61) rotating motor (62), output shaft (621) insertion of the motor (62) Fixation is connected to the center of Dropbox (61), the motor (62) is connected fixation by electric machine support (622) with cabinet (2).

7. range hood according to claim 6, it is characterised in that：Offered on the surface of the Dropbox (61) along center The groove (611) of arc symmetrical and in array arrangement, each groove (611) radially extending along Dropbox, and the groove (611) edge The radial direction of Dropbox (61) is at least distributed with two layers.

8. 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 (413) is equal with the first air inlet (413) position, described First air inlet (413) is set up in parallel with the second air inlet (413) and is respectively facing the arranged on left and right sides of cabinet (2).

9. range hood according to claim 8, it is characterised in that：First ternary leaf of the first ternary wind turbine (41) (412), the second 3 d impeller (422) of the second ternary wind turbine (42) are taken turns respectively from the horizontal by 60 °~90 °, and Two 3 d impellers tilt in the opposite direction.

10. range hood according to claim 8, it is characterised in that：The first ternary wind turbine (41) further includes first Spiral case (411), first 3 d impeller (412) are arranged in the first spiral case (411), and the second ternary wind turbine (42) is also wrapped The second spiral case (421) is included, second 3 d impeller (422) is arranged in the second spiral case (421), first spiral case (411) It is spaced, is arranged side by side with the second spiral case (421), first air inlet (413) is formed on the first spiral case (411), described Second air inlet (423) is formed on the second spiral case (421), formed with the first oil smoke passage in first spiral case (411) (441), the top of the first oil smoke passage (441) forms the first air outlet (414), is formed in second spiral case (421) There is the second oil smoke passage (442), the top of the second oil smoke passage (442) forms the second air outlet (424).

11. range hood according to claim 8, it is characterised in that：First 3 d impeller (412) and the second 3 d impeller (422) it is spaced, is arranged side by side in same spiral case (44), with corresponding first air inlet of the first 3 d impeller (412) (413), the opposite both sides of spiral case (44) are respectively formed at corresponding second air inlet (423) of the second 3 d impeller (422), Installing plate (45) is provided between first 3 d impeller (412) and the second 3 d impeller (422), the installing plate (45) is prolonged The top of spiral case (44) is reached, so that two the first independent oil smoke passages (441) and the second oil will be separated into spiral case (44) Cigarette channel (442), the top of the first oil smoke passage (441) form the first air outlet (414), the second oil smoke passage (442) top forms the second air outlet (424).

12. the range hood according to claim 10 or 11, it is characterised in that：Further include and be arranged on the first 3 d impeller (412) the driving motor (43) between the second 3 d impeller (422), the driving motor (43), which has, is respectively used to driving the The double output shaft of one 3 d impeller (412) and the second 3 d impeller (422).

13. the range hood according to claim 10 or 11, it is characterised in that：At the air outlet of the blower fan system (4) Be provided with outlet housing (5), the outlet housing (5) includes the cover body (51) in hollow tube-shape, the cover body (51) have it is opposite, The first end (511) and second end (512) of opening, the bore of the first end (511) are more than the bore of second end (512), institute State and the first deflector (521) and the second deflector (522) be provided with cover body (51), each deflector from cover body (51) first Hold (511) to extend to second end (512), first is formed between first deflector (521) and the madial wall of cover body (51) and is expanded Runner (531) is pressed, the second diffusion runner (532), institute are formed between second deflector (522) and the madial wall of cover body (51) The sectional area of the first diffusion runner (531) and the second diffusion runner (532) is stated respectively by the first end (511) of cover body (51) to Two ends (512) are gradually reduced, and the first diffusion runner (531) is at first end (511) place of cover body (51) and the first ternary wind The first air outlet (414) of machine (41) is corresponding, the second diffusion runner (532) first end (511) place of cover body (51) with The second air outlet (424) of second ternary wind turbine (42) is corresponding.

14. range hood according to claim 13, it is characterised in that：First deflector (521) and/or second lead Sound-absorbing hole (54) is densely covered with flowing plate (522).