CN206330188U - A kind of intelligent range hood - Google Patents
A kind of intelligent range hood Download PDFInfo
- Publication number
- CN206330188U CN206330188U CN201621469698.2U CN201621469698U CN206330188U CN 206330188 U CN206330188 U CN 206330188U CN 201621469698 U CN201621469698 U CN 201621469698U CN 206330188 U CN206330188 U CN 206330188U
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- Prior art keywords
- smoke deflector
- range hood
- nut
- hood
- blower
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- 239000000779 smoke Substances 0.000 claims abstract description 97
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 239000003517 fume Substances 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims description 29
- 230000003028 elevating effect Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 4
- 238000005034 decoration Methods 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 5
- 230000006978 adaptation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002153 concerted effect Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003831 deregulation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
A kind of intelligent range hood, including casing, the blower fan in casing, the exhaust fume collecting hood below casing and the smoke deflector below exhaust fume collecting hood, the transfer bar mechanism of driving smoke deflector lifting is provided with casing internal, it is characterised in that：Also include controller and the sensor for detecting casing oil smoke either internally or externally and/or vapour concentration, electric signal is connected between the signal output part of sensor and the signal input part of controller, and controller controls the rotating speed of blower motor and the lifting position of smoke deflector by the output signal of the sensor received.During work, sensor sensing casing internal or outside oil smoke and/or vapour concentration, controller according to the output signal size of sensor can adjust automatically blower motor rotating speed, and the air quantity of blower fan is adapted in real time with the operating mode of range hood, again can be by the lifting of smoke deflector come the distance between adjust automatically incoming air area and negative pressuren zone and cigarette source, with the change of adaptation condition.
Description
Technical field
The utility model is related to a kind of range hood, more particularly, to a kind of intelligent range hood.
Background technology
Existing range hood typically only sets two grades or three amount of keeping out the wind keys, and after motor speed is set, motor is not
The air quantity and blast of range hood according to actual kitchen environment or cooking method, can be adjusted, makes it adapt to and be in most close at any time
Manage working condition.Also, the oil smoke and steam produced in cooking process changes at any time, and existing range hood will not be led
It is dynamic to go to detect this change, it is impossible to which that regulation motor rotating speed is deacclimatized with changing air quantity at any time, and can only be gone not either manually or by button
Disconnected switching, not only operates and not enough facilitates, nor enough energy-conserving and environment-protective.Such as (the Granted publication of Patent No. 201210036643.2
Number be the B of CN 102538046) Chinese invention patent disclosed in《Rotation speed of fan can Automatic adjusument range hood》, should
Range hood can only be according to the resistance situation of air outlet, and de-regulation rotation speed of fan compensates air quantity, and can not be according to air outlet
Oil smoke, vapour concentration go adjustment motor output.
In addition, though disclosing the range hood with smoke deflector, such as Application No. in the prior art
Disclosed in the Chinese invention patent application of 201610029797.7 (application publication number is the A of CN 105423395)《Band is led automatically
The European type cooker hood of cigarette plate》, still, the smoke deflector of the range hood is only to be lifted when range hood starts and closes
Motion, when range hood is opened, smoke deflector sinks, and air inlet of kitchen ventilator is opened；When range hood is closed, on smoke deflector
Rise, air inlet of kitchen ventilator is closed.It can be seen that, the smoke deflector elevating movement of the range hood does not consider that the operating mode of range hood becomes
Change, i.e., can not be according to oil smoke and vapour concentration come the real-time lifting position that adjust smoke deflector, it is seen that the regulatory function of smoke deflector compared with
To be single.In addition, the smoke deflector drive mechanism of the range hood does not account for the pollution of oil smoke surroundings, should after permanent use
Greasy dirt is easily stained with each component of drive mechanism so that the friction of motion increase between each component, and then cause cigarette
Plate is difficult to be smoothed out elevating movement, meanwhile, it can also reduce the service life of drive mechanism.
Utility model content
Technical problem to be solved in the utility model is can be according to oil smoke there is provided one kind for above-mentioned state of the art
And vapour concentration size and between adjust automatically air quantity, incoming air area and negative pressuren zone and cigarette source distance intelligent range hood.
The utility model solve the technical scheme that is used of above-mentioned technical problem for：The intelligent range hood, including casing,
Blower fan in casing, the exhaust fume collecting hood below casing and the smoke deflector below exhaust fume collecting hood, the blower fan is by wind
Electromechanical machine driving, the transfer bar mechanism of driving smoke deflector lifting is provided with the casing internal, it is characterised in that：Also include control
Device processed and the sensor for detecting casing oil smoke either internally or externally and/or vapour concentration, the signal of the sensor are defeated
Go out electric signal between end and the signal input part of controller to connect, the controller passes through the output signal of the sensor received
To control the rotating speed of the blower motor and the lifting position of the smoke deflector.
Preferably, described casing includes accommodating blower fan blower hood wherein and is located at outside blower hood
Decorative Cover.
In order to sense the oil smoke and vapour concentration inside range hood, described sensor is arranged on the blower hood
Inside, and close to the air inlet of the blower fan.
In order to sense the oil smoke and vapour concentration of escape, described sensor is arranged on the outer of the Decorative Cover and exhaust fume collecting hood
Side.So, can be by detecting the escape situation of oil smoke and steam come the work air quantity and smoke deflector of adjust automatically range hood
Highly.
Preferably, in the state of the smoke deflector rises to extreme higher position, the smoke deflector closes entering for range hood
Air port.So, the spatter property of range hood can be lifted, and makes it have the function of certain smoke-backflow-proof taint of odour.
In order to improve smoke absorption effect, the smoke deflector is tilted obliquely from front to back, and tilt angle alpha=5~30 °.
Further preferably, in the state of the smoke deflector drops to extreme lower position, the front side edge of the smoke deflector along with
Vertical range d=0~300mm between exhaust fume collecting hood lower edge.
As the preferred of any of the above-described scheme, it is formed with what is be isolated with oil smoke between the Decorative Cover and blower hood
Installation cavity, the drive mechanism is in the installation cavity, and the drive output end of the drive mechanism is passed down through exhaust fume collecting hood
And be connected on the smoke deflector.In this way it can be ensured that drive mechanism is under non-oil smoke surroundings all the time, so that not only driving is led
The movement of cigarette plate is more smoothly, and can extend the service life of drive mechanism.
In order that drive mechanism can smoothly drive smoke deflector to make elevating movement, it is preferable that the drive mechanism includes
Motor, transfer bar mechanism, connecting plate, guide rail and sliding bar, the transfer bar mechanism are arranged on the centre of blower hood foreboard simultaneously
Driven by the motor, the sliding bar there are two and located at the both sides of the blower hood, and the sliding bar passes through collection
Petticoat pipe, the lower end of sliding bar is connected on the smoke deflector, and the upper end of sliding bar is connected with the connecting plate, and the guide rail has two
Bar and the both sides for being vertically installed at the blower hood respectively, the transfer bar mechanism drive connection plate are lifted along the guide rail
Motion, and then the sliding bar and smoke deflector is made synchronization lifting motion.
In order to avoid transfer bar mechanism produces noise and shake in the course of the work, it is preferable that transfer bar mechanism includes screw mandrel, the
One nut, the second nut and spring, the screw mandrel is vertically arranged and is rotated by the motor, first nut
It is sequentially arranged at from top to bottom on the screw mandrel with the second nut, the spring is set on screw mandrel and located at the first nut and the
Between two nuts, the spring has elastic force straight up to the first nut, and then avoids the first nut in motion process
The middle fit clearance because between screw mandrel and with screw mandrel produce shock.
In order that transfer bar mechanism, which is on optimal operational condition, first nut, is used for installation load, the spring pair
First nut produces elastic force F ＇ straight up, the gravity of the load, the deadweight of the first nut and the first nut and screw mandrel
Between frictional force make a concerted effort F, also, elastic force F ＇ and F size meets F ＇ with joint efforts in the component formation of vertically downward direction
=F.
The utility model has the advantage of：The intelligent range hood is by setting after sensor and controller, and sensor can
To sense casing oil smoke either internally or externally and/or vapour concentration, controller is according to the output signal of the sensor received
Size can adjust automatically blower motor rotating speed, and the air quantity of blower fan is adapted in real time with the operating mode of range hood,
Again can be by the lifting of smoke deflector come the distance between adjust automatically incoming air area and negative pressuren zone and cigarette source, with adaptation condition
Change.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is the structural representation of another angle of the utility model embodiment；
Fig. 3 is that the utility model embodiment is in the structural representation under decline state in smoke deflector；
Fig. 4 is that the utility model embodiment is in the structural representation under raised configuration in smoke deflector；
Fig. 5 is the structural representation of the utility model embodiment in a state of use；
Fig. 6 is structural representation of the utility model embodiment after Decorative Cover is removed；
Fig. 7 is the motor of the utility model embodiment and the structural representation of transfer bar mechanism；
Fig. 8 is the structure sectional view of the transfer bar mechanism of the utility model embodiment；
Fig. 9 is the control flow chart of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in Figures 1 to 5, the intelligent range hood in the present embodiment include Decorative Cover 1, blower hood 2, exhaust fume collecting hood 3,
The components such as blower fan 4, blower motor 5, smoke deflector 6, drive mechanism 7, sensor 8 and controller.Wherein, wherein, Decorative Cover 1 and wind
Machine outer cover 2 constitutes the casing of range hood, and blower hood 2 is inside Decorative Cover 1, and exhaust fume collecting hood 3 is located at the lower section of Decorative Cover 1, wind
Machine 4 is driven by blower motor 5, and blower fan 4 and blower motor 5 are inside blower hood 2, and smoke deflector 6 is located at the lower section of exhaust fume collecting hood 3.
Drive mechanism 7 is arranged on casing internal and for driving smoke deflector 6 to make elevating movement.Sensor 8 is arranged on the interior of blower hood 2
Portion and the air inlet of close blower fan, controller is on the power panel (not shown) of range hood, the signal output of sensor 8
Electric signal is connected between end and the signal input part of controller.When range hood works, at the sensing air inlet of sensor 8
Oil smoke and vapour concentration, controller adjust turning for blower motor 5 according to the output signal size of the sensor 8 received come corresponding
After the lifting position of speed and smoke deflector 6, the adjustment of rotational speed of blower motor 5, fan delivery accordingly changes, and the lifting position of smoke deflector 6 changes
After change, incoming air area and negative pressuren zone are also corresponding to the distance between cigarette source to be changed.
In the state of smoke deflector 6 rises to extreme higher position, smoke deflector 6 closes the air inlet of range hood, so that effectively
The spatter property of range hood is lifted, and it has the function of certain smoke-backflow-proof taint of odour.Drop to the shape of extreme lower position in smoke deflector 6
Under state, front side edge edge and the vertical range d=0~300mm between the lower edge of exhaust fume collecting hood 3, routinely, range hood of smoke deflector 6
After installing, the distance between the lower edge of exhaust fume collecting hood 3 and the kitchen range top 10 h=650mm~700mm.In addition, optimal in order to obtain
Smoke absorption effect, the smoke deflector 6 in the present embodiment is tilted obliquely from front to back, and tilt angle alpha=5~30 °.
In order to which drive mechanism 7 and oil smoke are isolated, in the present embodiment, it is formed between Decorative Cover 1 and blower hood 2
The installation cavity 9 being isolated with oil smoke, drive mechanism 7 is in installation cavity 9, and the drive output end of drive mechanism 7 is passed down through collection
Petticoat pipe 3 is simultaneously connected on smoke deflector 6.In this way it can be ensured that drive mechanism 7 is under non-oil smoke surroundings all the time, so as to not only drive
Dynamic smoke deflector movement is more smoothly, and can extend the service life of drive mechanism.
As shown in Figure 6 to 8, the drive mechanism 7 in the present embodiment includes motor 71, transfer bar mechanism 72, connecting plate
73rd, sliding bar 74 and guide rail 75.Transfer bar mechanism 72 is arranged on the centre of the foreboard of blower hood 2 and driven by motor 71, sliding
Lever 74 has two and located at the both sides of blower hood 2, and sliding bar 74 passes through exhaust fume collecting hood 3, and the lower end of sliding bar 74, which is connected to, leads
On cigarette plate 6, the upper end of sliding bar 74 is connected with connecting plate 73, and guide rail 75 has two and is vertically installed at blower hood 2 respectively
Both sides, the drive connection plate of transfer bar mechanism 72 makees elevating movement along the guide rail 75, and then sliding bar 74 and smoke deflector 6 is made together
Walk elevating movement.The drive mechanism provides the power of elevating movement by the transfer bar mechanism 72 in the middle of mounting bracket, passes through connecting plate
Power is transferred to both sides by 73, and the guide rails 75 of both sides ensures the vertical and steady of motion, sliding bar 74 and then is passed motion downwards
Smoke deflector 6 is handed to, so that the elevating movement of smoke deflector 6 is very steady.
Transfer bar mechanism 72 in the present embodiment uses leading screw and nut mechanism, and it includes screw mandrel 720, the first nut 721, second
Nut 722 and spring 723, screw mandrel 720 is vertically arranged and is rotated by motor 71, the first nut 721 and the second spiral shell
Mother 722 is sequentially arranged on screw mandrel 720 from top to bottom, and spring 723 is set on screw mandrel 720 and located at the first nut 721 and the
Between two nuts 722,723 pair of first nut 721 of spring has elastic force straight up, and then avoids the first nut 721 from existing
In motion process shock is produced because of the fit clearance between screw mandrel 720 with screw mandrel.
Connecting plate 73 is arranged on the first nut 721, and connecting plate 73, sliding bar 74 and smoke deflector 6 collectively form load, should
Point of frictional force between the gravity of load, the deadweight of the first nut 721 and the first nut and screw mandrel in vertically downward direction
Power forms the F that makes a concerted effort, and 723 pair of first nut 721 of spring has elastic force F ＇ straight up.
Two kinds of situations when the first nut of analysis below 721 is moved downward and moved upwards：
1., screw mandrel 720, which is rotated, drives the downward uniform motion of the first nut 721
As 0≤F ＇ ＜ F, when the first nut 721 moves to the position in gap just, because of F ＇ and F resultant direction
Downwards, identical with the direction of motion of the first nut 721, now, of short duration weightlessness occurs in the first nut 721, downward
Acceleration can increase the movement velocity of the first nut 721, then hit the lower interface in gap, so that impact noise is produced, this
The situation of kind typically periodically occurs with the rotation of screw mandrel 720.
As F ＇ >=F, F ＇ and F resultant direction upwards, with the direction of motion of the first nut 721 on the contrary, now, the first spiral shell
Weightlessness will not occur for mother 721, and mechanism will not produce noise and shake in the process of running；
2., screw mandrel 720, which is rotated, drives the upward uniform motion of the first nut 721
As 0≤F ＇≤F, F ＇ and F resultant direction downwards, with the direction of motion of the first nut 721 on the contrary, now, the
Weightlessness will not occur for one nut 721, and mechanism will not produce noise and shake in the process of running；
As F ＇ ＞ F, when the first nut 721 moves to the position in gap just, because F ＇ and F resultant direction to
On, identical with the direction of motion of the first nut 721, now, of short duration weightlessness occurs in the first nut 721, and mechanism was being run
Cheng Zhonghui produces noise and shake.
The above-mentioned two motion process of comprehensive first nut 721 is understood, when meeting F ＇=F, can avoid the first nut
721 produce shock because of the fit clearance between screw mandrel 720 in motion process up and down with screw mandrel 720, and then keep away
Exempt from leading screw and nut mechanism and produce noise and shake in the course of the work.
Range hood is opened after intelligent mode, and blower motor 5 is brought into operation with original state, and smoke deflector 6 is in initial bit
Put, sensor 8 starts detection oil smoke and vapour concentration, the object run for drawing blower motor 5 according to oil smoke and vapour concentration is joined
The object height of number and smoke deflector 6, then, controller drives blower motor 5 to run to target-like by motor drive module
State, while controller judges whether smoke deflector is in object height position, if object height position is in, not to smoke deflector
Lift adjustment is carried out, if smoke deflector is not in object height position, smoke deflector is elevated to the position of object height.
As shown in figure 9, lampblack absorber starts after intelligent mode, first, controller is run to just by smoke deflector and blower motor
Beginning state, sensor starts detection oil smoke, vapour concentration, and controller calculates the mesh of smoke deflector and blower motor according to concentration value
Mark state, then, controller detection smoke deflector current state, if smoke deflector is not in target location, are driven by smoke deflector
Module is drive mechanism adjustment smoke deflector position, smoke deflector is moved to target location, if smoke deflector is in target location,
Controller then detection blower fan motor current operating conditions, if blower motor off-duty is driven in dbjective state by motor
Module adjustment blower motor runs to dbjective state, if blower motor has operated in dbjective state, completes whole closed loop procedure.
It is of course also possible to which first the state to blower motor is judged and adjusted, then the state again to smoke deflector is carried out
Judge and adjust.
It the foregoing is only preferred embodiment of the present utility model, it is noted that for those of ordinary skill in the art
For, under the premise of principle of the present utility model is not departed from, a variety of remodeling or improvement can be carried out to the utility model, such as may be used
So that sensor to be arranged on to the outside of range hood, be such as arranged on the outside of Decorative Cover and exhaust fume collecting hood, with by detect oil smoke and
Steam escape situation adjusts the work air quantity and smoke deflector of range hood highly, and these are regarded as protection of the present utility model
Within the scope of.
Claims (10)
1. a kind of intelligent range hood, including casing, the blower fan (4) in casing, the exhaust fume collecting hood (3) below casing with
And the smoke deflector (6) below exhaust fume collecting hood, the blower fan (4) by blower motor (5) drive, be provided with the casing internal
Drive the transfer bar mechanism (7) of smoke deflector (6) lifting, it is characterised in that：Also include controller and for detect casing internal or
The sensor (8) of oil smoke and/or vapour concentration outside person, the signal output part of the sensor (8) and the signal of controller
Electric signal is connected between input, and the controller controls the blower fan by the output signal of the sensor (8) received
The rotating speed of motor (5) and the lifting position of the smoke deflector (6).
2. intelligent range hood according to claim 1, it is characterised in that：Described casing includes receiving blower fan (4) and existed
Blower hood (2) therein and the Decorative Cover (1) being located at outside blower hood (2).
3. intelligent range hood according to claim 2, it is characterised in that：Described sensor (8) is arranged on the wind
The inside of machine outer cover (2), and close to the air inlet of the blower fan (4).
4. intelligent range hood according to claim 2, it is characterised in that：Described sensor (8) is arranged on the dress
The outside of decorations cover (1) and exhaust fume collecting hood (3).
5. intelligent range hood according to claim 1, it is characterised in that：Highest order is risen in the smoke deflector (6)
In the state of putting, the smoke deflector (6) closes the air inlet of range hood.
6. intelligent range hood according to claim 1, it is characterised in that：The smoke deflector (6) is from front to back obliquely
Tilt, and tilt angle alpha=5~30 °.
7. intelligent range hood according to claim 6, it is characterised in that：Drop to lowest order in the smoke deflector (6)
In the state of putting, front side edge edge and the vertical range d=0~300mm between exhaust fume collecting hood (3) lower edge of the smoke deflector (6).
8. intelligent range hood according to claim 2, it is characterised in that：In the Decorative Cover (1) and blower hood (2)
Between be formed with the installation cavity (9) being isolated with oil smoke, the drive mechanism (7) is in the installation cavity (9), the driving
The drive output of mechanism (7) is passed down through exhaust fume collecting hood (3) and is connected on the smoke deflector (6).
9. intelligent range hood according to claim 8, it is characterised in that：The drive mechanism (7) includes motor
(71), transfer bar mechanism (72), connecting plate (73), sliding bar (74) and guide rail (75), the transfer bar mechanism (72) are arranged on blower fan
The centre of outer cover (2) foreboard is simultaneously driven by the motor (71), and the sliding bar (74) has two and located at the blower fan
The both sides of outer cover (2), the sliding bar (74) passes through exhaust fume collecting hood (3), and the lower end of sliding bar (74) is connected to the smoke deflector (6)
On, the upper end of sliding bar (74) is connected with the connecting plate (73), and the guide rail (75) has two and is vertically installed at institute respectively
The both sides of blower hood (2) are stated, transfer bar mechanism (72) the drive connection plate (73) makees elevating movement along the guide rail (75),
And then the sliding bar (74) and smoke deflector (6) is made synchronization lifting motion.
10. intelligent range hood according to claim 9, it is characterised in that：The transfer bar mechanism (72) includes screw mandrel
(720), the first nut (721), the second nut (722) and spring (723), the screw mandrel (720) is vertically arranged and is driven described
Dynamic motor (71) is rotated by, and first nut (721) and the second nut (722) are sequentially arranged at the silk from top to bottom
On bar (720), the spring (723) be set on screw mandrel (720) and located at the first nut (721) and the second nut (722) it
Between, the spring (723) has elastic force straight up to the first nut (721), and then avoids the first nut (721) in fortune
During dynamic shock is produced because of the fit clearance between screw mandrel (720) with screw mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621469698.2U CN206330188U (en) | 2016-12-29 | 2016-12-29 | A kind of intelligent range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621469698.2U CN206330188U (en) | 2016-12-29 | 2016-12-29 | A kind of intelligent range hood |
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| Publication Number | Publication Date |
|---|---|
| CN206330188U true CN206330188U (en) | 2017-07-14 |
Family
ID=59293190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621469698.2U Active CN206330188U (en) | 2016-12-29 | 2016-12-29 | A kind of intelligent range hood |
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| Country | Link |
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| CN (1) | CN206330188U (en) |
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| CN107166473A (en) * | 2017-07-25 | 2017-09-15 | 佛山市正略信息科技有限公司 | A kind of energy-saving range hood |
| CN107289478A (en) * | 2017-07-19 | 2017-10-24 | 宁波方太厨具有限公司 | A kind of smoke deflector elevating mechanism of range hood |
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