CN102954515A - Whirlwind generating device and range hood provided with same - Google Patents
Whirlwind generating device and range hood provided with same Download PDFInfo
- Publication number
- CN102954515A CN102954515A CN2011102536838A CN201110253683A CN102954515A CN 102954515 A CN102954515 A CN 102954515A CN 2011102536838 A CN2011102536838 A CN 2011102536838A CN 201110253683 A CN201110253683 A CN 201110253683A CN 102954515 A CN102954515 A CN 102954515A
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- Prior art keywords
- smoke exhaust
- exhaust ventilator
- jet
- cover body
- impingement
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Abstract
The invention provides a range hood. The range hood comprises a fan system, an exhaust fume collecting hood and wind inlets communicated with the fan system, wherein the wind inlets are arranged on the exhaust fume collecting hood. The range hood also comprises a whirlwind generating device, wherein the whirlwind generating device is arranged between a cooker panel and the exhaust fume collecting hood and comprises hood body parts and airflow jet parts; the airflow jet parts are used for jetting airflow toward the hood body parts; and the hood body parts are used for guiding airflow directions when the fan system and the airflow jet parts are simultaneously started and then generating whirlwind airflow flowing toward the wind inlets. As the whirlwind airflow can be generated, the oil fume suction of the range hood is obviously increased, thus oil fume escape can be reduced and the oil fume suction effect can be promoted. Besides, as the whirlwind effect can be generated, the user experience can be promoted.
Description
[technical field]
The present invention relates to the smoke exhaust ventilator field.
[background technology]
Range hood claims again smoke exhaust ventilator, is a kind of kitchen appliance that purifies kitchen environment.It is installed in the top of cooking stove in the kitchen, the harmful oil smoke that produces in the refuse of cooking stove burning and the cooking process can be taken away rapidly, discharges outdoorly, and the minimizing indoor pollution purifies the air of a room, and gas defence, explosion-proof safety guarantee effect are arranged.
How to reduce fumes escaping, and then promote oil smoke absorption effect, all be the wide concerned technical barrier in this area all the time, and it directly concerns the smoke exhaust ventilator competitiveness of product in market.For above-mentioned technical barrier, various solutions have appearred in the prior art: as, install the curtain that stops fumes escaping additional; For another example, improve blower fan system power etc.But these existing solutions or effect are undesirable, or can bring the new problems such as noise strengthens, power consumption increase, all can't fundamentally solve above-mentioned technical barrier.
Unless sufficient evidence support is arranged, otherwise prior art described here and do not mean that and admit that these prior aries those of ordinary skill for the field that the invention relates to before the application's the applying date is known.
[summary of the invention]
Main purpose of the present invention is to propose a kind ofly can significantly reduce fumes escaping, and then promotes the smoke exhaust ventilator technical solution that oil smoke is absorbed effect.
The smoke exhaust ventilator that the present invention proposes comprises blower fan system, exhaust fume collecting hood and the air inlet that is connected with described blower fan system, and described air inlet is arranged on the described exhaust fume collecting hood; Also comprise the cyclone generation device, this cyclone generation device is arranged between stove panel and the described exhaust fume collecting hood; Described cyclone generation device comprises cover body section and jet-impingement section; Described jet-impingement section is used for the jet-stream wind to described cover body section; Described cover body section is used for when described blower fan system and jet-impingement section start simultaneously, and steering current flows to, and then produces the cyclone air-flow that flows to described air inlet.Like this, owing to can produce the cyclone air-flow, smoke exhaust ventilator is significantly increased the suction of oil smoke, thereby can reduce fumes escaping, promote oil smoke and absorb effect.In addition, owing to can produce the cyclone effect, thus can promote user's experience.
Optionally, described cover body section integral body is perpendicular to described stove panel; Described cover body section is projected as opening towards the curve of burner on described stove panel.
Optionally, described curve is circular arc or circle involute or Archimedes spiral or logatithmic spiral.Like this, cyclone air-flow effect is better.
Optionally, the span of the radius R of described circular arc is 100mm to 250mm.This span is that the applicant obtains by a large amount of tests, and when taking this span, cyclone air-flow effect is better.
Optionally, the span of the corresponding central angle A of described circular arc is that 45 degree are to 270 degree.This span is that the applicant obtains by a large amount of tests, and when taking this span, cyclone air-flow effect is better.
Optionally, the span of the height of described cyclone generation device is 450mm to 850mm.This span is that the applicant obtains by a large amount of tests, and when taking this span, cyclone air-flow effect is better.
Optionally, the projection of described cyclone generation device on described stove panel, the span of the length L on the bearing of trend of described stove panel is 300mm to 1200mm.This span is that the applicant obtains by a large amount of tests, and when taking this span, cyclone air-flow effect is better.
Optionally, the span of the volumetric flow of gas of described blower fan system is 100m
3/ h to 800m
3/ h.This span is that the applicant obtains by a large amount of tests, and when taking this span, cyclone air-flow effect is better.
Optionally, the direction of the air-flow that described jet-impingement section sprays to described cover body section overlaps with the tangent line near the end points place of this jet-impingement section of described curve or parallel.Like this, can significantly reduce noise, and obtain better cyclone air-flow effect.
Optionally, described jet-impingement section directly is connected with cover body section or smoothly is connected by a rebound.
Optionally, described cover body section can bend to the wall direction.Described wall refers to vertical wall that smoke exhaust ventilator is installed, is attached at.Like this, under non-working condition, can be with described cover body section to the bending of wall direction, or even be posted by on the described wall, the sky that described cyclone generation device brings is installed is asked narrow sense thereby can alleviate to a certain extent.
Optionally, described air inlet is circular, and the span of its radius is 5mm to 250mm.This span is that the applicant obtains by a large amount of tests, and when taking this span, cyclone air-flow effect is better.
Optionally, the wind speed range of the air-flow that sprays of described jet-impingement section is 1m/s to 5m/s.This span is that the applicant obtains by a large amount of tests, and when taking this span, cyclone air-flow effect is better.
Optionally, described jet-impingement section is provided with several jet-impingement holes.
Optionally, also be provided with a control device, this control device is used for controlling air flow direction and/or the air-flow size in described jet-impingement hole.Like this, can promote the controllability of cyclone air-flow effect, make things convenient for the user to reach according to actual needs environment for use and control selection.
Optionally, the upper end of described cover body section is connected with described exhaust fume collecting hood.Like this, can further reduce fumes escaping, and promote cyclone air-flow effect.
Optionally, the quantity of described cover body section is two, and the quantity of described jet-impingement section also is two; Described two cover body sections are corresponding one by one respectively with two jet-impingement sections; Described two opposing settings of jet-impingement section.
Optionally, the quantity of described air inlet is two; Described two air inlets are corresponding one by one with described two cover body sections respectively.
Optionally, the quantity of described air inlet is one.
Optionally, described exhaust fume collecting hood is provided with accommodation device, and described cover body section is connected with described accommodation device; Described accommodation device is used for taking in the described cover body of placement section.Like this, under non-working condition, can be easily described cover body section be hidden.
Optionally, the housing of described jet-impingement section and described cover body section adopt integrally formed structure.Like this, on the one hand, can promote manufacturing efficient, reduce manufacturing cost; On the other hand, also can reduce the slit, be convenient to clean.
Optionally, described cover body section adopts transparent material to make.Like this, can alleviate to a certain extent the narrow sense in space that the described cyclone generation device of installation brings.
Optionally, the span of the thickness of described jet-impingement section is 25mm to 55mm.This span is that the applicant obtains by a large amount of tests, and when taking this span, noise is less.The thickness of described jet-impingement section refers to that described jet-impingement section is perpendicular to the thickness on the direction of described wall.
The present invention also proposes a kind of cyclone generation device, and this cyclone generation device is applied to above arbitrary described smoke exhaust ventilator; This cyclone generation device is used for the flow direction with the common steering current of blower fan system of described smoke exhaust ventilator, and then produces the cyclone air-flow of the air inlet that flows to described smoke exhaust ventilator.
[description of drawings]
The following drawings is only done the present invention and is schematically illustrated and explain, not delimit the scope of the invention, wherein:
Fig. 1 is the structural representation of a kind of cyclone generation device of the present invention embodiment;
Fig. 2 is another structural representation of cyclone generation device embodiment shown in Figure 1;
Fig. 3 is the schematic diagram of cyclone generation device embodiment shown in Figure 1 when opening in jet-impingement section;
Fig. 4 is cyclone generation device embodiment shown in Figure 1 another schematic diagram when opening in jet-impingement section;
Fig. 5 is the structural representation of a kind of smoke exhaust ventilator embodiment of the present invention;
Fig. 6 is the part sectioned view of smoke exhaust ventilator embodiment shown in Figure 5;
Fig. 7 is the structural representation of the another kind of smoke exhaust ventilator embodiment of the present invention;
Fig. 8 is the structural representation of the another kind of cyclone generation device of the present invention embodiment.
Explanation about Reference numeral among the figure:
The 1-exhaust fume collecting hood, 2-cyclone generation device, 3-stove panel, 4-cover body section, 5-jet-impingement section, 6-rebound.
[specific embodiment]
For making purpose of the present invention, scheme and beneficial effect more cheer and bright, the invention will be further described below in conjunction with accompanying drawing and preferred embodiment.What at first need to be explained is, " cyclone " that the present invention says only refers to be similar on the mode of appearance air-flow that the rotation of natural cyclone is risen, but not natural cyclone truly.
A kind of smoke exhaust ventilator embodiment that the present invention proposes, as shown in Figure 5, it comprises blower fan system, exhaust fume collecting hood 1 and the air inlet that is connected with blower fan system, air inlet is arranged on the exhaust fume collecting hood 1.With regard to the present embodiment, blower fan system is positioned at the top of air inlet.This smoke exhaust ventilator embodiment also is provided with cyclone generation device 2 as shown in Figures 1 to 4.What need here to be explained is, although used " cyclone generation device " this expression, but cyclone is to produce under the acting in conjunction of cyclone generation device 2 and blower fan system, " cyclone generation device " only is the expression of an image, fully by himself still being not enough to produce the cyclone effect.Particularly, blower fan system is used for producing negative pressuren zone at the air inlet near zone, and then steering current flows to air inlet; Cyclone generation device 2 then for generation of the rotation air channel, and makes described negative pressuren zone move down along described air channel, near oil smoke sources such as cookers.What need in addition to be explained is, the effect of exhaust fume collecting hood 1 is oil smoke is imported air inlet, and therefore, the concrete structure of exhaust fume collecting hood 1 is not limited with structure shown in Figure 5, as long as can realize above-mentioned functions, in some technical schemes even exhaust fume collecting hood 1 can be interpreted as the border area of air inlet.
As shown in Figure 5, cyclone generation device 2 is arranged between stove panel 3 and the exhaust fume collecting hood 1.Shown in Fig. 1 to 6, cyclone generation device 2 comprises cover body section 4 and jet-impingement section 5.Jet-impingement section 5 is used for to cover body section 4 jet-stream winds.The thickness of jet-impingement section 5 is 45mm.Cover body section 4 is used for when blower fan system and jet-impingement section 5 start simultaneously, and steering current flows to, and then produces the cyclone air-flow that flows to air inlet.The wind speed of the air-flow that jet-impingement section 5 sprays is 3.8m/s.Cyclone generation device 2 is being 650mm perpendicular to the height on the direction of stove panel 3, and with regard to the present embodiment, this highly is exactly cover body section 4 perpendicular to the height on the direction of stove panel 3.The upper end of cover body section 4 is connected with exhaust fume collecting hood 1.Under the use state, the bottom of cover body section 4 is apart from stove panel 100mm.
Cyclone generation device 2 integral body projection such as Fig. 2 and shown in Figure 4 on stove panel 3, this length L that is projected on the bearing of trend of stove panel 3 is 1000mm.
With regard to the present embodiment, the quantity of cover body section 4 is two, and the quantity of jet-impingement section 5 also is two; Two cover body sections 4 are corresponding one by one respectively with two jet-impingement sections 5; Two jet-impingement section 5 opposing settings.Two cover body sections 4 are symmetrical arranged, and therefore, two the circular arc projections of cover body section 4 on stove panel 3 also are symmetrical.Two jet-impingement sections 5 also are symmetrical arranged.The housing of two jet-impingement sections 5 and two cover body sections 4 adopt integrally formed technique to make.Correspondingly, kitchen range have two burners.Two cover body sections 4 are corresponding one by one respectively with two burners.The quantity of air inlet is one, and is rounded, and its radius is 90mm.The volumetric flow of gas of blower fan system is adjustable, and its minimum value is 100m
3/ h, maximum occurrences is 800m
3/ h, and between minimum value and maximum occurrences, have a plurality of gears available, such as 400m
3/ h, 600m
3/ h.
Jet-impingement section 5 integral body are also perpendicular to stove panel 3.Jet-impingement section 5 smoothly is connected by a rebound 6 with cover body section 4.The direction of the air-flow that jet-impingement section 5 sprays to cover body section 4 overlaps with the tangent line near the end points place of this jet-impingement section 5 of above-mentioned circular arc (i.e. this cover body section 4 projection on stove panel 3) or parallel, shown in Fig. 3,4 and 6.
Two jet-impingement sections 5 are provided with plural jet-impingement hole respectively.These jet-impingement holes are used for 4 jet-stream winds to corresponding cover body section.The air-flow that two jet-impingement sections 5 spray comes from same air supply system.
Below only be the preferred embodiments of the present invention, some technical characterictic is made amendment and replaced the embodiment that can also obtain other.As, the cyclone generation device also can be preferably 450mm or 750mm or 850mm perpendicular to the height on the direction of stove panel.For another example, the radius R of circular arc also can be preferably 100mm or 250mm.For another example, the corresponding central angle A of circular arc also can be preferably 45 degree or 270 degree.For another example, the length L of cyclone generation device integral body on the bearing of trend that is projected in stove panel on the stove panel also can be preferably 300mm or 1200mm.For another example, the radius of circular air inlet also can be preferably 5mm or 250mm.For another example, the quantity of air inlet also can be two; These two air inlets roughly are arranged at respectively the top of two burners; These two air inlets match with described two cover body sections respectively.Particularly, two Fans can be set matches with these two air inlets respectively; Also can only establish a Fans, be shared by two air inlets, further, also can controller for opening and closing be set respectively at two air inlet places, be used for whether being communicated with of control air inlet and blower fan.For another example, the projection of cover body section on stove panel also can be circle involute or Archimedes spiral or the logatithmic spiral of opening towards burner.For another example, on the exhaust fume collecting hood accommodation device can be set further, cover body section is connected with accommodation device; Accommodation device is used for taking in and places cover body section, thereby can hide cover body section under non-working condition.For another example, cover body section and exhaust fume collecting hood also can adopt integrally formed technique to make.For another example, each jet-impingement section also can only arrange a long and narrow jet-impingement hole.For another example, the quantity of cover body section and jet-impingement section also can be one, and as shown in Figure 7, corresponding kitchen range are single-hole range.For another example, a control device can also be set further, control air flow direction and/or the air-flow size in jet-impingement hole by this control device.For another example, the wind speed of the air-flow of jet-impingement section injection also can be preferably 1m/s or 5m/s.For another example, cover body section also can adopt can be to the structure of wall direction bending, and for example, cover body section can comprise a plurality of plate bodys unit, is connected with project planning between the adjacent panels body unit, and the plate body unit can rotate around its project planning that connects; Perhaps, cover body section also can adopt the material that is easy to bend to make.For another example, cover body section also can adopt transparent material, makes such as glass, transparent plastic etc.
Embodiment 2
The present invention also proposes another kind of cyclone generation device embodiment, as shown in Figure 8, it is to improve on the basis of scheme shown in the embodiment 1 to obtain, and main the improvement is embodied in: at first, jet-impingement section directly is connected with cover body section, and no longer by this medium of rebound; Secondly, the overall volume of two jet-impingement sections is less.
Need annotatedly to be, the present invention should not be understood to only limit to embodiment described above, but should be understood to cover claim of the present invention in conjunction with the specification disclosure definite all possible performance.Therefore, every content that does not break away from technical solution of the present invention to any simple modification, equivalent variations and modification that above embodiment does, all belongs to the protection domain of technical solution of the present invention according to technical spirit of the present invention.
Claims (24)
1. a smoke exhaust ventilator comprises blower fan system, exhaust fume collecting hood (1) and the air inlet that is connected with described blower fan system, and described air inlet is arranged on the described exhaust fume collecting hood (1), it is characterized in that:
Also comprise cyclone generation device (2), this cyclone generation device (2) is arranged between stove panel (3) and the described exhaust fume collecting hood (1);
Described cyclone generation device (2) comprises cover body section (4) and jet-impingement section (5);
Described jet-impingement section (5) is used for to described cover body section (4) jet-stream wind;
Described cover body section (4) is used in described blower fan system and jet-impingement section (5) when starting simultaneously, and steering current flows to, and then produces the cyclone air-flow that flows to described air inlet.
2. smoke exhaust ventilator according to claim 1 is characterized in that:
Described cover body section (4) is whole perpendicular to described stove panel (3);
Described cover body section (4) is projected as opening towards the curve of burner on described stove panel (3).
3. smoke exhaust ventilator according to claim 2 is characterized in that:
Described curve is circular arc or circle involute or Archimedes spiral or logatithmic spiral.
4. smoke exhaust ventilator according to claim 3 is characterized in that:
The span of the radius R of described circular arc is 100mm to 250mm.
5. smoke exhaust ventilator according to claim 3 is characterized in that:
The span of the corresponding central angle A of described circular arc is that 45 degree are to 270 degree.
6. smoke exhaust ventilator according to claim 2 is characterized in that:
The span of the height of described cyclone generation device (2) is 450mm to 850mm.
7. smoke exhaust ventilator according to claim 2 is characterized in that:
The projection of described cyclone generation device (2) on described stove panel (3), the span of the length L on the bearing of trend of described stove panel (3) is 300mm to 1200mm.
8. smoke exhaust ventilator according to claim 1 is characterized in that:
The span of the volumetric flow of gas of described blower fan system is 100m
3/ h to 800m
3/ h.
9. smoke exhaust ventilator according to claim 2 is characterized in that:
The direction of the air-flow that described jet-impingement section (5) sprays to described cover body section (4) overlaps with the tangent line near the end points place of this jet-impingement section (5) of described curve or parallel.
10. smoke exhaust ventilator according to claim 9 is characterized in that:
Described jet-impingement section (5) directly is connected with cover body section (4) or smoothly is connected by a rebound (6).
11. smoke exhaust ventilator according to claim 1 is characterized in that:
Described cover body section (4) can bend to the wall direction.
12. smoke exhaust ventilator according to claim 1 is characterized in that:
Described air inlet is circular, and the span of its radius is 5mm to 250mm.
13. smoke exhaust ventilator according to claim 1 is characterized in that:
The wind speed range of the air-flow that described jet-impingement section (5) sprays is 1m/s to 5m/s.
14. smoke exhaust ventilator according to claim 1 is characterized in that:
Described jet-impingement section (5) is provided with several jet-impingement holes.
15. smoke exhaust ventilator according to claim 14 is characterized in that:
Also be provided with a control device, this control device is used for controlling air flow direction and/or the air-flow size in described jet-impingement hole.
16. smoke exhaust ventilator according to claim 1 is characterized in that:
The upper end of described cover body section (4) is connected with described exhaust fume collecting hood (1).
17. smoke exhaust ventilator according to claim 1 is characterized in that:
The quantity of described cover body section (4) is two, and the quantity of described jet-impingement section (5) also is two;
Described two cover body sections (4) are corresponding one by one respectively with two jet-impingement sections (5);
The opposing setting of described two jet-impingement sections (5).
18. smoke exhaust ventilator according to claim 17 is characterized in that:
The quantity of described air inlet is two;
Described two air inlets are corresponding one by one with described two cover body sections (4) respectively.
19. smoke exhaust ventilator according to claim 17 is characterized in that:
The quantity of described air inlet is one.
20. each described smoke exhaust ventilator in 19 according to claim 1 is characterized in that:
Described exhaust fume collecting hood (1) is provided with accommodation device, and described cover body section (4) is connected with described accommodation device;
Described accommodation device is used for taking in the described cover body section (4) of placing.
21. each described smoke exhaust ventilator in 19 according to claim 1 is characterized in that:
The housing of described jet-impingement section (5) and described cover body section (4) adopt integrally formed structure.
22. each described smoke exhaust ventilator in 19 according to claim 1 is characterized in that:
Described cover body section (4) adopts transparent material to make.
23. each described smoke exhaust ventilator in 19 according to claim 1 is characterized in that:
The span of the thickness of described jet-impingement section (5) is 25mm to 55mm.
24. a cyclone generation device (2), this cyclone generation device (2) is applied to the described smoke exhaust ventilator of above each claim; This cyclone generation device (2) is used for the flow direction with the common steering current of blower fan system of described smoke exhaust ventilator, and then produces the cyclone air-flow of the air inlet that flows to described smoke exhaust ventilator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102536838A CN102954515A (en) | 2011-08-27 | 2011-08-27 | Whirlwind generating device and range hood provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102536838A CN102954515A (en) | 2011-08-27 | 2011-08-27 | Whirlwind generating device and range hood provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102954515A true CN102954515A (en) | 2013-03-06 |
Family
ID=47763667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102536838A Pending CN102954515A (en) | 2011-08-27 | 2011-08-27 | Whirlwind generating device and range hood provided with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102954515A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383116A (en) * | 2013-05-19 | 2013-11-06 | 关云龙 | Range hood with jet wind shield protective panel |
| CN103673006A (en) * | 2012-09-11 | 2014-03-26 | Bsh博世和西门子家用电器有限公司 | Smog elimination device with smog elimination cover and air guiding device |
| CN106958841A (en) * | 2017-02-28 | 2017-07-18 | 滑铁卢计算流体力学工程咨询公司 | Conserving kitchen oil smoke pumping cooking equipment |
| CN107023865A (en) * | 2017-02-28 | 2017-08-08 | 滑铁卢计算流体力学工程咨询公司 | Smoke exhaust ventilator |
| CN107044676A (en) * | 2017-05-05 | 2017-08-15 | 武汉理工大学 | A kind of composite purification type smoke exhaust ventilator based on tornado effect |
| TWI629436B (en) * | 2017-02-28 | 2018-07-11 | 滑鐵盧計算流體力學工程諮詢公司 | Range hood and oil smoke collector thereof |
| TWI629437B (en) * | 2017-02-28 | 2018-07-11 | 滑鐵盧計算流體力學工程諮詢公司 | Range hood |
| CN114593450A (en) * | 2022-05-09 | 2022-06-07 | 杭州老板电器股份有限公司 | Range hood curtain device, range hood and control method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673006A (en) * | 2012-09-11 | 2014-03-26 | Bsh博世和西门子家用电器有限公司 | Smog elimination device with smog elimination cover and air guiding device |
| CN103673006B (en) * | 2012-09-11 | 2017-01-04 | Bsh家用电器有限公司 | There is the smog elimination device of Wo 2008055837 and air guiding device |
| CN103383116A (en) * | 2013-05-19 | 2013-11-06 | 关云龙 | Range hood with jet wind shield protective panel |
| CN106958841A (en) * | 2017-02-28 | 2017-07-18 | 滑铁卢计算流体力学工程咨询公司 | Conserving kitchen oil smoke pumping cooking equipment |
| CN107023865A (en) * | 2017-02-28 | 2017-08-08 | 滑铁卢计算流体力学工程咨询公司 | Smoke exhaust ventilator |
| TWI629436B (en) * | 2017-02-28 | 2018-07-11 | 滑鐵盧計算流體力學工程諮詢公司 | Range hood and oil smoke collector thereof |
| TWI629437B (en) * | 2017-02-28 | 2018-07-11 | 滑鐵盧計算流體力學工程諮詢公司 | Range hood |
| TWI629438B (en) * | 2017-02-28 | 2018-07-11 | 滑鐵盧計算流體力學工程諮詢公司 | Kitchen cooking equipment with range hood |
| CN107044676A (en) * | 2017-05-05 | 2017-08-15 | 武汉理工大学 | A kind of composite purification type smoke exhaust ventilator based on tornado effect |
| CN114593450A (en) * | 2022-05-09 | 2022-06-07 | 杭州老板电器股份有限公司 | Range hood curtain device, range hood and control method thereof |
| CN114593450B (en) * | 2022-05-09 | 2022-08-16 | 杭州老板电器股份有限公司 | Range hood curtain device, range hood and control method thereof |
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Application publication date: 20130306 |
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| RJ01 | Rejection of invention patent application after publication |