CN209294135U - A kind of centrifugal blower and the range hood using the centrifugal blower - Google Patents
A kind of centrifugal blower and the range hood using the centrifugal blower Download PDFInfo
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- CN209294135U CN209294135U CN201821553164.7U CN201821553164U CN209294135U CN 209294135 U CN209294135 U CN 209294135U CN 201821553164 U CN201821553164 U CN 201821553164U CN 209294135 U CN209294135 U CN 209294135U
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Abstract
The utility model discloses a kind of centrifugal blower, including spiral case, the spiral case includes ring wall, outlet and volute tongue, it is characterised in that: on the ring wall, positioned at spiral case molded line back segment and the position of outlet of spiral case is provided with vortex generator.Also disclose the range hood that a kind of application has above-mentioned centrifugal blower.By after spiral case inlet pressure fragment position vortex generator is set, the flow separation phenomenon at Lai Gaishan fan outlet, to reduce aerodynamic noise；And the height of vortex generator can be automatically adjusted to adapt to different spiral case wall boundary layer thickness according to the flow velocity of the air-flow under different operating conditions, guarantee to be attained by preferable rectifying noise-reduction effect under different operating conditions, promotes kitchen ventilator performance.
Description
Technical field
The utility model relates to cooking apparatus, especially a kind of centrifugal blower, and application have the oil suction of the centrifugal blower
Smoke machine.
Background technique
The working principle of centrifugal blower is that the rotation of motor impeller does work to air-flow, and by the diffusion action of spiral case from
Radial discharge.Since smoke evacuation environment is different, domestic cooking fume remover can be according to the resistance situation of exhaust pass under corresponding operating condition
Operation, 0~Figure 23 is selected according to the performance test bed operating condition of range hood normal air from big resistance to slight drag operating condition referring to fig. 2
It selects four typical conditions and carries out fluid emulations, obtain under typical condition in blower and air outlet section pressure cloud charts, Ke Yicong
See in figure, under four operating conditions, due to the influence of blower fan structure and export environment, apparent stream can be generated near fan outlet
Dynamic separation and stronger pressure fluctuation, this both will cause the loss of energy, can also generate stronger aerodynamic noise.
It is existing in order to improve the flow regime that air-flow enters blower, reduce gas flow loss and flow noise, usually
Denoising device is set at the entrance and exit of blower.One kind as disclosed in the Chinese patent application No. is 201720526157.7
Noise reducing casing, including spiral case coaming plate, side plate, the first sound-absorbing component, the second sound-absorbing component, air-ducting ring and outlet mounting plate, side plate
Be set to the two sides of spiral case coaming plate, spiral case coaming plate, side plate top form air outlet, offer air inlet, air-ducting ring on side plate
It is set to the side of spiral case coaming plate, and is located at the outside of side plate, the first sound-absorbing component is set to the either side of spiral case coaming plate, and
Between side plate and spiral case coaming plate, the second sound-absorbing component is set between air-ducting ring and side plate；The for another example application of the applicant
A kind of volute of blower for range hood disclosed in Chinese patent number for 201610111243.1, including volute tongue, volute tongue packet
Volute tongue inner wall is included, volute tongue forms closed cavity, and cavity is interior to be disposed at least one longitudinal baffle along the axis direction of spiral case,
Multiple radial partitions are disposed with along the axis direction of vertical spiral case, cavity is separated into multiple independences by longitudinal baffle and radial partition
Closed noise reduction cavity, hole is offered in the corresponding volute tongue inner wall section of each noise reduction cavity, by by the cavity in volute tongue
Multiple independent closed areolas are separated into, the air column in cavity and cavity inner wall friction and sound energy consumption, to carry out
Sqouynd absorption lowering noise.
The denoising device in fans entrance or exit is arranged in above-mentioned these, not to the improvement of blower interior flow field characteristic
Greatly, therefore it need to be further improved.
Utility model content
First technical problem to be solved in the utility model is in view of the above-mentioned problems of the prior art, providing one
Kind improves the flow separation phenomenon at fan outlet, to reduce the centrifugal blower of aerodynamic noise.
Second technical problem to be solved in the utility model is to provide the oil suction that a kind of application has above-mentioned centrifugal blower
Smoke machine.
The utility model solves technical solution used by above-mentioned first technical problem are as follows: a kind of centrifugal blower, including
Spiral case, the spiral case include ring wall, outlet and volute tongue, it is characterised in that: the back segment of the molded line on the ring wall, positioned at spiral case is simultaneously
And the position of the outlet of spiral case is provided with vortex generator.
Preferably, the molded line of the spiral case is in involute helix, and the starting point of the molded line of the spiral case is described close to volute tongue
The back segment of the molded line of spiral case is at 240 °~300 ° of helix.
Preferably, be convenient for adjust vortex generator height, the vortex generator include push-rod electric machine, outer leafs and
Intra vane, the push-rod electric machine are fixed on the outside of the ring wall of spiral case, and the output shaft of the push-rod electric machine extends into ring wall
Side, the outer leafs and intra vane are then located at the inside of ring wall, and the intra vane setting is in outer blade interior and and push-rod electric machine
Output axis connection so that intra vane can opposite outer leafs make the linear motion close to or far from ring wall.
Preferably, it is preferably minimized in order to which caused aerodynamic noise will be disturbed, the outer leafs and intra vane are the wing
Type shape.
The utility model solves technical solution used by above-mentioned second technical problem are as follows: a kind of application has as described above
Centrifugal blower range hood, the range hood be internally provided with the operating condition for detecting range hood operating condition detection dress
It sets, the condition detector is electrically connected with vortex generator, so as to according to the different operating conditions vortex hairs detected
Raw device acts accordingly.
One aspect according to the present utility model, the exit of the centrifugal blower are provided with outlet housing, the outlet housing
Top be provided with outlet conduit, the condition detector is the flow rate measuring device being arranged on outlet conduit, the stream
Speed measuring device includes after the Pitot tube on the inside of outlet conduit peripheral wall and the flow rate information for measuring Pitot tube processing is arranged in
Vortex generator is fed back to control the feedback unit of vortex generator movement.
Other side according to the present utility model, the exit of the centrifugal blower are provided with outlet housing, the outlet air
Outlet conduit is provided at the top of cover, the condition detector is the flow rate measuring device being arranged on outlet conduit, described
Flow rate measuring device includes that the static tube being arranged on the inside of outlet conduit peripheral wall and the flow rate information for measuring Pitot tube are handled
It is fed back afterwards to vortex generator and controls the feedback unit of vortex generator movement.
To make air-flow at Pitot tube or static tube uniform, measurement is more acurrate, and the flow rate measuring device further includes setting
Flow straightening grid in outlet conduit, on oil smoke flow path, the Pitot tube or static tube are located at the downstream of flow straightening grid.
Other side according to the present utility model, the centrifugal blower further include impeller and the electricity for driving impeller
Machine, the condition detector be power detection module, the power detection module include be arranged on the bus of the motor,
It is arrived for detecting the power detecting unit of the power of motor, and by being fed back after power information processing that power detecting unit measures
Vortex generator is to control the feedback unit that vortex generator acts.
Other side according to the present utility model, the centrifugal blower further include impeller, and the condition detector is
Rotation speed measuring module, the rotation speed measuring module includes the rotation speed measurement unit for detecting wheel speed, and revolving speed is surveyed
Feedback controls the feedback unit of vortex generator movement to vortex generator after the rotary speed information processing that amount unit measures.
Compared with the prior art, the advantages of the utility model are: passing through the fragment position setting vortex hair after spiral case inlet pressure
Give birth to device, the flow separation phenomenon at Lai Gaishan fan outlet, to reduce aerodynamic noise；And it can be according to the air-flow under different operating conditions
Flow velocity, automatically adjust the height of vortex generator to adapt to different spiral case wall boundary layer thickness, guarantee in different operating conditions
Under be attained by preferable rectifying noise-reduction effect, promote kitchen ventilator performance.
Detailed description of the invention
Fig. 1 is the schematic diagram of one embodiment of the range hood of the utility model；
Fig. 2 is the cross-sectional view of one embodiment of the range hood of the utility model；
Fig. 3 is the schematic diagram of the centrifugal blower of one embodiment of the range hood of the utility model；
Fig. 4 is the cross-sectional view of the centrifugal blower of one embodiment of the range hood of the utility model；
Fig. 5 is the signal of the vortex generator of the centrifugal blower of one embodiment of the range hood of the utility model
Figure；
Fig. 6 is the section view of the vortex generator of the centrifugal blower of one embodiment of the range hood of the utility model
Figure；
Fig. 7 is the schematic diagram of the outlet conduit of one embodiment of the range hood of the utility model；
Fig. 8 is the cross-sectional view of the outlet conduit of one embodiment of the range hood of the utility model；
I enlarged diagram of part that Fig. 9 is Fig. 8；
Figure 10 is the control flow chart of one embodiment of the range hood of the utility model；
Figure 11-1 is the shape of the vortex generator of the centrifugal blower of one embodiment of the range hood of the utility model
State A schematic diagram；
Figure 11-2 is the shape of the vortex generator of the centrifugal blower of one embodiment of the range hood of the utility model
State B schematic diagram；
Figure 11-3 is the shape of the vortex generator of the centrifugal blower of one embodiment of the range hood of the utility model
State C schematic diagram；
Figure 11-4 is the shape of the vortex generator of the centrifugal blower of one embodiment of the range hood of the utility model
State D schematic diagram；
Figure 12 is the schematic diagram of the outlet conduit of second embodiment of the range hood of the utility model；
Figure 13 is the cross-sectional view of the outlet conduit of second embodiment of the range hood of the utility model；
II enlarged diagram of part that Figure 14 is Figure 13；
Figure 15 is the control flow chart of second embodiment of the range hood of the utility model；
Figure 16 is the schematic diagram of the centrifugal blower of the third embodiment of the range hood of the utility model；
Figure 17 is the control flow chart of the third embodiment of the range hood of the utility model；
Figure 18 is the cross-sectional view of the 4th embodiment of the range hood of the utility model；
Figure 19 is the control flow chart of the 4th embodiment of the range hood of the utility model；
Figure 20 is the pressure cloud atlas of No. 3 orifice plates of the range hood of the prior art；
Figure 21 is the pressure cloud atlas of No. 5 orifice plates of the range hood of the prior art；
Figure 22 is the pressure cloud atlas of No. 7 orifice plates of the range hood of the prior art；
Figure 23 is the pressure cloud atlas of No. 9 orifice plates of the range hood of the prior art.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Embodiment one
Referring to figs. 1 to 4, a kind of range hood including exhaust fume collecting hood 1, is arranged in the cabinet 2 of 1 top of exhaust fume collecting hood and sets
The centrifugal blower 3 in cabinet 2 is set, the exit of centrifugal blower 3 is provided with outlet housing 4, and the top of outlet housing 4 is provided with outlet
It pipeline 5 and interconnects.Air inlet 11 is offered on exhaust fume collecting hood 1.To under the action of centrifugal blower 3, by oil smoke from suction
The lower section of kitchen ventilator is sucked inside range hood by air inlet 11, and is discharged to by outlet housing 4 and outlet conduit 5 public
Flue.
Centrifugal blower 3 includes spiral case 31, the impeller 32 being arranged in spiral case 31, preceding wind deflector 35 and rear wind deflector 36, snail
Shell 31 includes ring wall 311, and before the front end of ring wall 311 is fixed on wind deflector 35, the rear end of ring wall 311 is fixed on rear wind deflector 36
On.Ring wall 311, preceding wind deflector 35 and rear wind deflector 36 are further defined with the outlet 312 of spiral case 31.Spiral case 31 also has volute tongue 313.
The back segment of ring wall 311 is provided with vortex generator 33 close to the position of the outlet 312 of spiral case 31.In the present embodiment
In, vortex generator 33 have it is multiple, from close to preceding wind deflector 35 position to close to rear wind deflector 36 location interval arrange.
The molded line of ring wall 311 is in involute helix, and the rear fragment position of 311 molded line of ring wall is arranged in vortex generator 33, ring wall 311
The starting point of molded line refers to close to fragment position after volute tongue 313, molded line at 240 °~300 ° of helix.
Referring to figs. 5 and 6, vortex generator 33 includes push-rod electric machine 331, outer leafs 332 and intra vane 333.Push rod electricity
Machine 331 is preferably servo motor, is fixed on the outside of ring wall 311 of spiral case 31, the output shaft 3311 of push-rod electric machine 331 prolongs
Protrude into 311 inside of ring wall.Outer leafs 332 and intra vane 333 are then located at the inside of ring wall 311, and wherein intra vane 332 is arranged outside
Inside blade 332, and it is connect with the output shaft of push-rod electric machine 331 3311.Push-rod electric machine 331 can push 333 phase of intra vane as a result,
Linear motion close to or far from ring wall 311 is made to outer leafs 332.Outer leafs 332 and intra vane 333 are the metal of air foil shape
Blade can be the shapes such as rectangle, ellipse, trapezoidal.
Since fluid has viscosity, the retardation when flowing along wall surface due to wall surface surface can be near wall
One layer of boundary layer is formed, the calculation formula of boundary layer thickness is as follows:
Re=ρ vx/ μ；
Wherein δ is boundary layer thickness, and Re is Reynolds number, and v is fluid velocity, and μ is dynamic viscosity, and x is coordinate, can be seen
Bigger to flow velocity more large Reynold number, boundary layer thickness is smaller.
Vortex generator 33 is usually used in delaying the generation of High Angle of Attack lower surface flow separation, and installation direction is along air-flow side
To.The principle of vortex generator 33 are as follows: in the blading of the wall surface surface that fluid flows through setting air foil shape, when air-flow flows through
A series of Shedding Vortex is generated at rear after blade, the tubulence energy of downstream side interlayer can be enhanced in these Shedding Vortexes, so that downstream
Fluid is not easy that flow separation occurs with wall surface.And (intra vane 333 and outer leafs 332 are whole opposite for the height of vortex generator 33
The height of the ring wall 311 of spiral case 31), the generally half or so of boundary layer thickness related with the thickness in place boundary layer.
The height of the vortex generator 33 of the application can be adjusted within the scope of 2mm~20mm, it is preferred that be 3mm~6mm.
For air foil shape, aerodynamic noise caused by capable of disturbing drops to most 33 shape of vortex generator that the application uses
It is low.And since the height magnitude of vortex generator 33 only has grade, the disturbance of generation is rested essentially in boundary-layer, is produced
Raw noise will not have an impact to range hood overall noise.
In order to enable the height of vortex generator 33 to automatically adjust, range hood is internally provided with condition detector,
It is electrically connected with the push-rod electric machine 331 of vortex generator 33.In the present embodiment, referring to fig. 2, Fig. 7~Fig. 9, condition detector
For the flow rate measuring device being arranged on outlet conduit 5, going out including the flow straightening grid 61 that is arranged in outlet conduit 5, setting
The feedback unit 63 on the outside of 5 peripheral wall of Pitot tube 62 and outlet conduit on the inside of mouth 5 peripheral wall of pipeline, on oil smoke flow path, skin
Trustship 62 is located at the downstream of flow straightening grid 61.Feedback unit 63 includes scale regulating loop 631, amplifier 632 and master controller 63,
Master controller 63 is electrically connected with the push-rod electric machine 331 of vortex generator 33.Flow straightening grid 61 makes air-flow enter outlet conduit 5
Within after be rectified the rectification of grid 61 so that the air-flow near Pitot tube 62 is uniform, measure more acurrate.Pitot tube 62 uses
The prior art offers the static bole 621 of measurement static pressure Ps on periphery wall, and bottom end offers the total of measurement stagnation pressure Pt
Measured hole 622 is pressed, formula is passed through:
Wherein ρ is smoke density, it is possible thereby to acquire the flow velocity v for flowing through Pitot tube 62.Pass through what is be connected with Pitot tube 62
Feedback unit 63 feeds back to vortex generator 33 after handling flow rate information, then drive intra vane 333 by push-rod electric machine 331
To adjust the height of vortex generator 33, thus under different operating conditions flow separation phenomenon and aerodynamic noise have preferably
Inhibiting effect, and promote fan performance.
For a certain specific model, air performance test first is carried out in laboratory, PQ curve is measured, is obtained by flow rate conversion
To flow speed value corresponding with orifice plate operating condition, be written in feedback unit 63 after calibration, allow feedback unit 63 according to calibration value (including
The corresponding data of both height of flow velocity v, vortex generator 33) it is controlled.The calculation formula of boundary layer thickness as described above,
The thickness of 31 surface boundary layer of spiral case can be probably estimated according to flow velocity v, thus by the height of vortex generator 33 adjust to
Analog value, the height of vortex generator 33 is generally between the 0.5~1 of boundary layer thickness.
According to the example of the control method of the range hood of a certain specific model, process as shown in Figure 10, including it is as follows
Step:
1) it demarcates: after resulting flow velocity calibration will be tested, by the height two of calibrated each flow velocity and vortex generator 33
In the corresponding relationship write-in feedback unit 63 of person；
2) velocity measurement: when ambient windstream variation current in range hood work, Pitot tube 62 measures current flow velocity
V (unit m/s) is handled by feedback unit 63, including flow velocity v and scale regulating loop 631 (such as potentiometer) as amplifier 632
Two inputs, the output of amplifier 632 are transferred to master controller 633；
3) adjust 33 height of vortex generator: master controller 633 reads pre-deposit and whirlpool according to the flow velocity v measured
The corresponding relationship of the height of flow-generator 33 judges corresponding operating condition and adjusts needed for vortex generator 33 under this operating condition
Highly, and by push-rod electric machine 331 intra vane 333 is driven to act: if v ∈ (0,5] (indicate that No. 3 orifice plates and resistance are bigger
Operating condition), the height adjustment of vortex generator 33 to 6mm (state A, Figure 11-1)；If v ∈ (5,8] (indicate No. 3 orifice plates to No. 5
Operating condition between orifice plate), the height adjustment of vortex generator 33 to 5mm (state B, Figure 11-2)；If v ∈ (8,13.5] (indicate 5
Number orifice plate is to operating condition between No. 7 orifice plates), the height adjustment of vortex generator 33 to 4mm (state C, Figure 11-3)；If v ∈
(13.5,16] (indicating No. 7 orifice plates to operating condition between No. 9 orifice plates), to 3mm, (state D schemes the height adjustment of vortex generator 33
11-4).Flow velocity v is bigger, and the height of vortex generator 33 is smaller.
Embodiment two
Referring to Figure 12~Figure 14, in the present embodiment, the difference with embodiment one is, condition detector is to export
The static pressure measurement device being arranged on pipeline 5, including be arranged in outlet conduit 5 flow straightening grid 61, be arranged at outlet conduit 5 weeks
The feedback unit 63 on the outside of static tube 62 ' and 5 peripheral wall of outlet conduit on the inside of wall, on oil smoke flow path, 62 ' position of static tube
In the downstream of flow straightening grid 61.Flow straightening grid 61 is rectified the rectification of grid 61 after air-flow is entered within outlet conduit 5, from
And make the air-flow of static tube 62 ' nearby uniform, it measures more acurrate.Static tube 62 ' uses the prior art, opens up on periphery wall
There is the static bole 621 ' of measurement static pressure Ps, measures and feed back to whirlpool after being handled flow rate information by feedback unit 63 after static pressure
Flow-generator 33.
Its control method is referring to Figure 15, with embodiment one the difference is that detecting flow velocity v using static tube 62 '.
Embodiment three
Referring to Figure 16, in the present embodiment, the difference is that, condition detector is power with above-described embodiment one
The bus 341 of the motor 34 for driving impeller 32 of centrifugal blower 3, including power detecting unit is arranged in detection module 7
71 and feedback unit, detection unit 71 is used to detect the power of motor 34, and the effect of feedback unit is the same as example 1, will survey
Vortex generator 33 is fed back to after the power information processing obtained, 33 blade of vortex generator is then adjusted by push-rod electric machine 331
Height.
For a certain specific model, air performance test first is carried out in laboratory, PQ curve is measured, is obtained by flow rate conversion
It to flow speed value corresponding with orifice plate, is written in feedback unit after calibration, allows feedback unit according to calibration value (including power and whirlpool
The corresponding data of both height of flow-generator 33) it is controlled.
According to the example of the control method of the range hood of a certain specific model, process as shown in figure 17, including it is as follows
Step:
1) it demarcates: after resulting power calibration will be tested, by the height two of calibrated each power and vortex generator 33
In the corresponding relationship write-in feedback unit of person；
2) power scale: when operating condition variation in range hood work, power detecting unit 71 measures the power P of motor 34
(unit w), is handled by feedback unit, and power and scale regulating loop 631 (such as potentiometer) including motor 34 are used as amplifier
632 two inputs, the output of amplifier 632 are transferred to master controller 633；
3) adjust the height of vortex generator 33: master controller 633 is pre-deposited according to the power of the motor 34 measured, reading
The corresponding relationship with the height of vortex generator 33, judge corresponding operating condition and under this operating condition needed for vortex generator 33
The height adjusted, and by push-rod electric machine 331 drive intra vane 333 act: when P ∈ [145,155) (and indicate No. 3 orifice plates and
The bigger operating condition of resistance), vortex generator height adjustment to 6mm (state A)；When P ∈ [155,185) (indicates No. 3 orifice plates to 5
Operating condition between number orifice plate), vortex generator height adjustment to 5mm (state B)；When P ∈ [185,225) (indicates No. 5 orifice plates to 7
Operating condition between number orifice plate), vortex generator height adjustment to 4mm (state C)；When P ∈ [225,260) (indicates No. 7 orifice plates to 9
Operating condition between number orifice plate), vortex generator height adjustment to 3mm (state D).Power P is bigger, and the height of vortex generator 33 is got over
It is small.
Example IV
Referring to Figure 18, in the present embodiment, the difference with embodiment one is, condition detector is tachometric survey mould
Block, including rotation speed measurement unit 81 and feedback unit, rotation speed measurement unit 81 are used to detect the revolving speed of impeller 32, including reflector plate
811, Laser emission and reception device 812, wherein the mid-game 321 of impeller 32, Laser emission and reception dress is arranged in reflector plate 81
82 settings are set in 2 front side of cabinet.The effect of feedback unit is the same as example 1, and will be fed back after the rotary speed information measured processing
To vortex generator 33, the height of 33 blade of vortex generator is then adjusted by push-rod electric machine 331.
For a certain specific model, first carry out air performance test in laboratory, measure PQ curve and with orifice plate operating condition phase
Corresponding revolving speed is written in feedback unit after calibration, in feedback unit, allows feedback unit according to calibration value (including revolving speed and whirlpool
The corresponding data of both height of flow-generator 33) it is controlled.
Included the following steps: as shown in figure 19 according to the control example of the range hood of a certain specific model
1) it demarcates: after resulting revolving speed (unit rms) calibration will be tested, by calibrated each revolving speed and vortex generator 33
The corresponding relationship write-in feedback unit of both height in；
2) velocity measurement: when operating condition variation current in range hood work, rotation speed measurement unit 81 measures current turn
Fast R, is handled by feedback unit, and revolving speed and scale regulating loop 631 (such as potentiometer) including impeller 32 are as amplifier 632
Two inputs, the output of amplifier 632 are transferred to master controller 633；
3) adjust 33 height of vortex generator: master controller 633 reads pre-deposit and whirlpool according to the revolving speed R measured
The corresponding relationship of the height of flow-generator 33 judges corresponding operating condition and adjusts needed for vortex generator 33 under this operating condition
Highly, and by push-rod electric machine 331 drive intra vane 333 to act: when R ∈ [1400,1450) (indicate No. 3 orifice plates and resistance more
Big operating condition), vortex generator height adjustment to 6mm (state A)；When R ∈ [1350,1400) (indicates No. 3 orifice plates to No. 5 holes
Operating condition between plate), vortex generator height adjustment to 5mm (state B)；When R ∈ [1250,1350) (indicates No. 5 orifice plates to No. 7
Operating condition between orifice plate), vortex generator height adjustment to 4mm (state C)；When R ∈ [1100,1250) (indicates No. 7 orifice plates to 9
Operating condition between number orifice plate), vortex generator height adjustment to 3mm (state D).Revolving speed R is smaller, and the height of vortex generator 33 is got over
It is small.
Claims (10)
1. a kind of centrifugal blower, including spiral case (31), the spiral case (31) includes ring wall (311), outlet (312) and volute tongue
(313), it is characterised in that: the back segment of the molded line on the ring wall (311), positioned at spiral case (31) and going out close to spiral case (31)
The position of mouth (312) is provided with vortex generator (33).
2. centrifugal blower according to claim 1, it is characterised in that: the molded line of the spiral case (31) is in involute spiral
Line, for the starting point of the molded line of the spiral case (31) close to volute tongue (313), the back segment of the molded line of the spiral case (31) is helix
At 240 °~300 °.
3. centrifugal blower according to claim 1, it is characterised in that: the vortex generator (33) includes push-rod electric machine
(331), outer leafs (332) and intra vane (333), the push-rod electric machine (331) are fixed on the outer of the ring wall (311) of spiral case (31)
On side, the output shaft (3311) of the push-rod electric machine (331) is extended on the inside of ring wall (311), the outer leafs (332) and internal lobe
Piece (333) is then located at the inside of ring wall (311), and intra vane (333) setting is internal in outer leafs (332) and electric with push rod
The output shaft (3311) of machine (331) connects, so that intra vane (333) outer leafs (332) can be made close to or far from ring relatively
The linear motion of wall (311).
4. centrifugal blower according to claim 3, it is characterised in that: the outer leafs (332) and intra vane (333) are
Air foil shape.
5. a kind of application is just like the range hood of the described in any item centrifugal blowers of Claims 1 to 4, inside the range hood
It is provided with the condition detector for detecting range hood operating condition, the condition detector is electrically connected with vortex generator (33)
It connects, so as to be acted accordingly according to the different operating conditions vortex generators (33) detected.
6. range hood according to claim 5, it is characterised in that: the exit of the centrifugal blower is provided with outlet housing
(4), it is provided with outlet conduit (5) at the top of the outlet housing (4), the condition detector is to set on outlet conduit (5)
The flow rate measuring device set, the flow rate measuring device include be arranged Pitot tube (62) on the inside of outlet conduit (5) peripheral wall, with
And it is fed back after handling the flow rate information that Pitot tube (62) measures to vortex generator (33) to control vortex generator (33)
The feedback unit (63) of movement.
7. range hood according to claim 5, it is characterised in that: the exit of the centrifugal blower is provided with outlet housing
(4), it is provided with outlet conduit (5) at the top of the outlet housing (4), the condition detector is to set on outlet conduit (5)
The flow rate measuring device set, the flow rate measuring device include be arranged static tube (62 ') on the inside of outlet conduit (5) peripheral wall,
And it is fed back after handling the flow rate information that Pitot tube (62) measures to vortex generator (33) to control vortex generator
(33) feedback unit (63) acted.
8. range hood according to claim 6 or 7, it is characterised in that: the flow rate measuring device further includes that setting exists
Flow straightening grid (61) in outlet conduit (5), on oil smoke flow path, the Pitot tube (62) or static tube (62 ') are located at
The downstream of flow straightening grid (61).
9. range hood according to claim 5, it is characterised in that: the centrifugal blower further includes impeller (32) and is used for
The motor (34) of impeller (32) is driven, the condition detector is power detection module (7), the power detection module (7)
Power detecting unit (71) including the power on the bus (341) of the motor (34), for detecting motor (34) is arranged,
And feedback controls vortex hair to vortex generator (33) after handling the power information that power detecting unit (71) measures
The feedback unit of raw device (33) movement.
10. range hood according to claim 5, it is characterised in that: the centrifugal blower further includes impeller (32), described
Condition detector is rotation speed measuring module (8), and the rotation speed measuring module (8) includes for detecting turning for impeller (32) revolving speed
Feedback is to vortex generator (33) after fast measuring unit (81), and rotary speed information processing that rotation speed measurement unit (81) is measured
To control the feedback unit of vortex generator (33) movement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821553164.7U CN209294135U (en) | 2018-09-22 | 2018-09-22 | A kind of centrifugal blower and the range hood using the centrifugal blower |
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| CN201821553164.7U CN209294135U (en) | 2018-09-22 | 2018-09-22 | A kind of centrifugal blower and the range hood using the centrifugal blower |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460073A (en) * | 2021-01-26 | 2021-03-09 | 佛山市顺德区美的洗涤电器制造有限公司 | Volute tongue and fan comprising same |
| WO2021056861A1 (en) * | 2019-09-25 | 2021-04-01 | 佛山市顺德区美的洗涤电器制造有限公司 | Kitchen device |
| CN114251284A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251285A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251283A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| WO2022062031A1 (en) * | 2020-09-25 | 2022-03-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and housing structure thereof, and range hood |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021056861A1 (en) * | 2019-09-25 | 2021-04-01 | 佛山市顺德区美的洗涤电器制造有限公司 | Kitchen device |
| CN114251284A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251285A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251283A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| WO2022062031A1 (en) * | 2020-09-25 | 2022-03-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan and housing structure thereof, and range hood |
| CN114251284B (en) * | 2020-09-25 | 2024-04-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251283B (en) * | 2020-09-25 | 2024-04-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN114251285B (en) * | 2020-09-25 | 2024-04-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
| CN112460073A (en) * | 2021-01-26 | 2021-03-09 | 佛山市顺德区美的洗涤电器制造有限公司 | Volute tongue and fan comprising same |
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