CN107023862A - A kind of top-sucking kitchen ventilator - Google Patents
A kind of top-sucking kitchen ventilator Download PDFInfo
- Publication number
- CN107023862A CN107023862A CN201610071510.7A CN201610071510A CN107023862A CN 107023862 A CN107023862 A CN 107023862A CN 201610071510 A CN201610071510 A CN 201610071510A CN 107023862 A CN107023862 A CN 107023862A
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- CN
- China
- Prior art keywords
- blower fan
- trochal disc
- rear trochal
- rectifying cavity
- kitchen ventilator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of top-sucking kitchen ventilator, includes blower hood, and blower fan is provided with blower hood, it is characterised in that：Assembling chamber and rectifying cavity are divided into inside blower hood, rectifying cavity is located at the lower section of the assembling chamber, and blower fan uses three-dimensional flow impeller, and assembling is simultaneously connected in assembling intracavitary, the air intake mouth down of blower fan with described rectifying cavity.The advantage of the invention is that：Assembling chamber and the rectifying cavity below assembling chamber are separated into inside the blower hood of the top-sucking kitchen ventilator, blower fan installed in assembling intracavitary uses three-dimensional flow impeller, and the air intake mouth down of blower fan and be connected with rectifying cavity, the structure and space layout of whole range hood are more novel, and blower fan is used after three-dimensional flow impeller, blower fan structure is more compact, size is relatively small, fan efficiency and blast are high, the suction gradient of generation is big, fumes escaping can be effectively prevented, the clean absorption rate of range hood can be substantially improved.
Description
Technical field
The present invention relates to a kind of range hood, more particularly, to a kind of top-sucking kitchen ventilator.
Background technology
Blower fan is the important component of range hood, and the impeller of blower fan plays a part of energy conversion, impeller performance it is good
The bad performance for directly affecting range hood.With industry development, the blower fan system homogeneity of range hood core component is used as
Change is on the rise, and conventional fan performance boost space is limited.At present, traditional draught fan impeller used for range hood is generally
It is fastened and connected after flat board is stamping by two ends, blade can only typically make the circular arc of uniform thickness, because impeller turns
Speed is generally more obvious with flowing back more than fluid separation actual between 800RPM, thus blade.In addition, being inhaled for top
For the range hood of formula, the air inlet of blower fan is typically toward front, the air outlet of blower fan is set upward, i.e. blower fan
Air inlet is mutually in 90 ° with fan outlet, during blower fan work, and due to impeller, to gas, the effect of prewhirling and gas exist
Flow into impeller and carry out that direction can be altered in steps in 90 ° of steering procedures, simple self-consistentency imports and exports angle for impeller
Actual acting ability be unfavorable.In order to improve fan efficiency, although people have also carried out much changing on blade construction
Enter, but these improvement are also limited to two-dimensional current and move technology, the efficiency of blower fan improves relatively limited, it is impossible to fundamentally gram
The defect present in two-dimensional impeller is taken, correspondingly, existing range hood generally existing that static pressure is relatively low, effective wind rate is inclined
The problem of small, poor anti jamming capability and fumes escaping.In summary, need to make existing top-sucking kitchen ventilator structure
Further improve.
The content of the invention
The technical problems to be solved by the invention be for above-mentioned state of the art there is provided a kind of structure it is novel, can be significantly
Lift the top-sucking kitchen ventilator of static pressure and effective wind rate.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：The top-sucking kitchen ventilator, includes outside blower fan
Cover, blower fan is provided with the blower hood, it is characterised in that：Blower fan peace is divided into inside described blower hood
It behave affectedly and rectifying cavity, the rectifying cavity is located at the lower section of the assembling chamber, the blower fan uses three-dimensional flow impeller, institute
Assembling is stated in assembling intracavitary, the air intake mouth down of blower fan is simultaneously connected with described rectifying cavity.
In order to improve rectification effect, it is preferable that described rectifying cavity is in the structure that upper end is small, lower end is big, the blower fan
Central part of the air inlet at the top of the rectifying cavity.
Further preferably, the trapezium structure that bottom is short, bottom is long is presented in the longitudinal cross-section of the rectifying cavity, the rectifying cavity
Value relation between height h1 and the diameter D of air inlet is D≤h1≤3D.
In order to improve the rectification effect of rectifying cavity, horizontally disposed screens is installed in described rectifying cavity, it is described whole
Value relation between the vertical range h2 and air inlet of drift net and air inlet diameter D is h2 ＜ D.
In order to reduce the operating noise of range hood, bloop is provided with the cavity wall of the rectifying cavity, in the rectifying cavity
Outer wall and the blower hood inwall between be filled with acoustical cotton.
Further preferably, described three-dimensional flow impeller includes rear trochal disc and blade, and the bottom of the blade is arranged on rear trochal disc
Card on and be arranged in order along the circumferencial direction of rear trochal disc, the outer side edges of the blade are air outlet side, the outside
While the angle α between projection and rear trochal disc excircle normal on rear trochal disc outer circumference surface is 60 °≤α≤60 ° of ﹣,
The inner side edge of the blade be air inlet side, the inner side edge projected on rear trochal disc outer circumference surface with rear trochal disc excircle
Angle β between normal is 20 °≤β≤70 °, the line between the outer side edges bottom and the rear trochal disc center of circle with it is described
The angle theta that line between inner side edge bottom and the rear trochal disc center of circle is formed is 10 °≤θ≤65 °, the outer side edges
Vertical height h3 and inner side edge summit value relative to the vertical height h4 of rear trochal disc of the summit relative to rear trochal disc
Relation is 0.2≤h3/h4≤0.8.Three-dimensional flow impeller is used after said structure, and the aeroperformance of blower fan is more preferable, fan efficiency
Higher with blast, the suction gradient of generation is bigger.
Further preferably, the three-dimensional flow impeller also includes the protecgulum installed in vane tip, turns in the protecgulum and impeller
Meridian plane where axle it is intersecting be formed in part with from-inner-to-outer successively the first arc section of rounding off, the second arc section and
Straightway, value relation between the radius R1 of first arc section and the radius R2 of the second arc section for 0.1≤
R1/R2≤0.6, the value relation between the length L of the straightway and the radius R2 of the second arc section is 0.1≤L/R2
≤0.4.So, the three-dimensional flow impeller is double shrouded wheel, and blade is arranged between rear trochal disc and protecgulum.
Blower fan can have various structures, it is preferable that the blower fan include described three-dimensional flow impeller, spiral case, motor,
Air intake mouth circle and outlet housing, the three-dimensional flow impeller be arranged on spiral case inside, the output shaft of the motor downwards, institute
The rear trochal disc for stating three-dimensional flow impeller is arranged on the output shaft of the motor, and described air intake mouth circle is arranged on the air intake of blower fan
Mouthful simultaneously installed with the front cover match of three-dimensional flow impeller, the air outlet of the blower fan upward and is biased in the assembling chamber
Sidepiece, described outlet housing is arranged on described air outlet.
In order to further improve fan efficiency, the spacing δ between the rear trochal disc and the spiral case wall of the neighbouring rear trochal disc is
1mm≤δ≤10mm, the protecgulum is set in outside air intake mouth circle, and protecgulum front side edge along with outside the air intake mouth circle
Vertical range Δ between the wall of side is 0.5mm≤Δ≤5mm.
In order to reduce the operating noise of range hood, the air outlet edge of the outlet housing is in lobe type, or in outlet housing
Air outlet annular wall on be provided with through hole and make air outlet annular wall in mesh-structured.
Compared with prior art, the advantage of the invention is that：Separate inside the blower hood of the top-sucking kitchen ventilator and become a common practice
Machine installation cavity and the rectifying cavity below assembling chamber, the blower fan installed in assembling intracavitary use three-dimensional flow leaf
Wheel, and the air intake mouth down of blower fan and be connected with rectifying cavity, the structure and space layout of whole range hood are more novel,
And blower fan is used after three-dimensional flow impeller, blower fan structure is more compact, and size is relatively small, and fan efficiency and blast are high,
The suction gradient of generation is big, can effectively prevent fumes escaping, the clean absorption rate of range hood can be substantially improved.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the sectional view of the embodiment of the present invention；
Fig. 3 is the structural representation of the draught fan impeller of the embodiment of the present invention；
Fig. 4 is the side view of draught fan impeller shown in Fig. 3；
Fig. 5 is the structural representation of the blade air outlet side hypsokinesis of the present invention；
The structural representation that Fig. 6 leans forward for the blade air outlet side of the present invention；
Perspective views of the Fig. 7 for blade air inlet side of the invention on impeller meridian plane；
Fig. 8 is the sectional view of draught fan impeller shown in Fig. 3；
Fig. 9 is the sectional view of draught fan impeller shown in Fig. 3；
Figure 10 is perspective view of the blade of the embodiment of the present invention on impeller meridian plane；
Figure 11 is the blower fan structure schematic diagram of the embodiment of the present invention；
Figure 12 is the perspective exploded view of blower fan shown in Figure 11；
Figure 13 is the sectional view of blower fan shown in Figure 11.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
As depicted in figs. 1 and 2, the top-sucking kitchen ventilator in the present embodiment includes blower hood 1, blower fan 2, collection cigarette
The critical pieces such as cover 8, cowling panel 9, the inside of blower hood 1 is separated into the He of assembling chamber 4 by lateral partitions 3
Rectifying cavity 5, rectifying cavity 5 is located at the lower section of assembling chamber 4, and blower fan 2 is arranged in assembling chamber 4, blower fan 2
Air intake mouth down and be connected with rectifying cavity 5, the air inlet of blower fan 2 located at the top of rectifying cavity 5 central part, than
Such as can with middle or the position being substantially centered, the air outlet of blower fan 2 upward, the structure of exhaust fume collecting hood 8 and cowling panel 9
For existing conventional structure, description is not deployed herein.
In the present embodiment, the trapezium structure that bottom is short, bottom is long, the height of rectifying cavity 5 are presented in the longitudinal cross-section of rectifying cavity 5
Value relation between the diameter D of h1 and the air inlet of blower fan 2 is D≤h1≤3D.In addition, in order to further improve whole
The rectification effect of chamber is flowed, is provided with rectifying cavity 5 on horizontally disposed screens 6, screens 6 and is provided with filter bores 61,
The percent opening of screens is ＞ 30%, also, the vertical range h2 and air inlet of screens 6 and air inlet
Diameter D between value relation be h2 ＜ D.In order to effectively reduce noise during blower fan work, in the chamber of rectifying cavity 5
It is provided with bloop 51 on wall, percent opening ＞ 5%, also, between the outer wall of rectifying cavity 5 and the inwall of blower hood 1
Filled with acoustical cotton 7.
As shown in Figures 3 to 10, what the blower fan 2 in the present embodiment was used makes three-dimensional flow impeller 20, the three-dimensional flow impeller
20 be double shrouded wheel, and it includes rear trochal disc 21, blade 22 and protecgulum 23, and blade 22 is arranged on rear trochal disc 21 with before
Between lid 23, blade 22 has 10~50, specifically, and the bottom of blade 22 is arranged in the card of rear trochal disc 21 and edge
The circumferencial direction for rear trochal disc is arranged in order, and the outer side edges 221 of blade 22 are air outlet side, and outer side edges 221 are rear
The angle α between projection and the excircle normal of rear trochal disc 21 on wheel disc outer circumference surface is 60 °≤α≤60 ° of ﹣, leaf
The inner side edge 222 of piece be air inlet side, and inner side edge 222 projected on rear trochal disc outer circumference surface with outside rear trochal disc 21
Angle β between circumference normal is between 20 °≤β≤70 °, and the bottom of outer side edges 221 and the center of circle of rear trochal disc 21
Line between line and the bottom of inner side edge 222 and the center of circle of rear trochal disc 21 forms angle theta for 10 °≤θ≤65 °,
The summit of outer side edges 221 is relative to the vertical height h3 of rear trochal disc 21 and the summit of inner side edge 222 relative to rear trochal disc 21
Vertical height h4 value relation is 0.2≤h3/h4≤0.8.In addition, in the present embodiment, the outer side edges 221 of blade 22
On the outer peripheral face for being distributed in same cylinder, the inner side edge 222 of blade 22 is oblique tilted from top to bottom, the bottom of blade 22
Side 223 is in the same plane, and the top margin 224 of blade 22 is in rounding off structure.
Protecgulum 23 is arranged on the top of blade, in protecgulum 23 and being formed in part with that the meridian plane where impeller shaft intersects
From-inner-to-outer the first arc section 231 of rounding off, the second arc section 232 and straightway 233, the first arc section successively
Value relation between the radius R2 of 231 radius R1 and the second arc section 232 is 0.1≤R1/R2≤0.6, straight line
Value relation between the section 233 length L and radius R2 of the second arc section 232 is 0.1≤L/R2≤0.4.
Three-dimensional flow is defined from the dimension of design, and three-dimensional flow refers in actually flowing, and all flow parameters are all empty
Between three direction variable functions (x, y, z) of coordinate system.Because the actual flowing of gas is irregular, therefore two-dimensional current
(x, y) can not truly reflect the actual flow trace of gas, and Three -dimension flow then can truly reflect.
After the three-dimensional flow impeller of said structure, blade aerodynamic profile is more reasonable, and flowing accelerating region is longer, current stabilization area phase
To longer, the number of blade is few, it is possible to reduce the loss such as import impact, the outlet tail separation of flow, gas separation, closer to gas
Real Flow Field state, therefore efficiency is obviously improved, and more preferably, three-dimensional flow impeller has the characteristic of compressed air to static pressure,
During work, antijamming capability is lifted in the negative pressuren zone of the one big gradient of air inlet formation, so as to effectively prevent oil smoke
Escape.Through experiment, the top-sucking kitchen ventilator is preferable in the pressure distribution uniformity of fan inlet, and pitot loss is smaller.
As shown in Figure 11 to Figure 13, the blower fan 2 that the range hood of the present embodiment is used include three-dimensional flow impeller 20,
Spiral case 24, motor 25, air intake mouth circle 26 and outlet housing 27, three-dimensional flow impeller 20 are arranged on inside spiral case 24, motor
Downwards, the rear trochal disc 21 of three-dimensional flow impeller 20 is arranged on the output shaft of motor 25 and uses nut 25 output shaft
28 lockings, air intake mouth circle 26 is arranged on the air inlet of blower fan 25 and coordinates installation with the protecgulum 23 of three-dimensional flow impeller 20,
The air outlet of blower fan 2 upward and is biased in the sidepiece of assembling chamber 4, and outlet housing 27 is arranged on air outlet, and is gone out
Through hole 271 is provided with the air outlet annular wall of fan housing 27 and makes air outlet annular wall in mesh-structured, so as to reduce fume-exhausting
The noise of machine air outlet.In addition, in order that blower fan has higher efficiency, the snail of rear trochal disc 21 and the neighbouring rear trochal disc
Spacing δ between shell wall 241 is 1mm≤δ≤10mm, and protecgulum 23 is set in outside air intake mouth circle 26, and protecgulum 23
Front side edge along and the vertical range Δ between the lateral wall of air intake mouth circle 26 be 0.5mm≤Δ≤5mm.
It the foregoing is only the preferred embodiment of the present invention, it is noted that for those of ordinary skills,
Under the premise of the principle of the present invention is not departed from, a variety of remodeling or improvement can be carried out to the present invention, such as blower fan can also be adopted
With unshrouded impeller, that is, the protecgulum in the double shrouded wheel of the present embodiment is saved, and such as can also be by the air outlet side of outlet housing
Along lobe type is designed to, these are regarded as within protection scope of the present invention.
Claims (10)
1. a kind of top-sucking kitchen ventilator, includes blower hood (1), blower fan (2) is installed in the blower hood (1),
It is characterized in that：Assembling chamber (4) and rectifying cavity (5), the rectifying cavity are divided into inside described blower hood (1)
(5) it is located at the lower section of the assembling chamber (4), the blower fan (2) is installed using three-dimensional flow impeller (20), the blower fan (2)
In assembling chamber (4), the air intake mouth down of blower fan (2) is simultaneously connected with described rectifying cavity (5).
2. top-sucking kitchen ventilator according to claim 1, it is characterised in that：Described rectifying cavity (5) is in upper end
The big structure in small, lower end, the central part of the air inlet of the blower fan (2) at the top of rectifying cavity (5).
3. top-sucking kitchen ventilator according to claim 1, it is characterised in that：The longitudinal direction of the rectifying cavity (5) is cut
The trapezium structure that bottom is short, bottom is long is presented in face, the height h1 of the rectifying cavity (5) and the diameter D of blower fan (2) air inlet it
Between value relation be D≤h1≤3D.
4. top-sucking kitchen ventilator according to claim 1, it is characterised in that：Pacify in described rectifying cavity (5)
Equipped with horizontally disposed screens (6), the vertical range h2's and air inlet of the screens (6) and air inlet
Value relation between diameter D is h2 ＜ D.
5. top-sucking kitchen ventilator according to claim 1, it is characterised in that：Cavity wall in the rectifying cavity (5)
On be provided with bloop (51), between the outer wall of the rectifying cavity (5) and the inwall of the blower hood (1) be filled with acoustical cotton
(7)。
6. the top-sucking kitchen ventilator according to any claim in claim 1 to 5, it is characterised in that：Institute
The three-dimensional flow impeller (20) stated includes rear trochal disc (21) and blade (22), and the bottom of the blade (22) is arranged on rear trochal disc (21)
Card on and be arranged in order along the circumferencial direction of rear trochal disc, the outer side edges (221) of the blade (22) are air outlet side,
Angle α between projection and rear trochal disc (21) excircle normal of the outer side edges (221) on rear trochal disc outer circumference surface is
60 °≤α≤60 ° of ﹣, the inner side edge (222) of the blade is air inlet side, and the inner side edge (222) is outside rear trochal disc
The angle β between rear trochal disc (21) excircle normal projected on periphery is 20 °≤β≤70 °, the outer side edges
(221) between line between bottom and rear trochal disc (21) center of circle and the inner side edge (222) bottom and rear trochal disc (21) center of circle
The angle theta that line is formed is 10 °≤θ≤65 °, and outer side edges (221) summit is hung down relative to rear trochal disc (21)
Straight height h3 and value relation of the inner side edge (222) summit relative to the vertical height h4 of rear trochal disc (21) be 0.2≤
h3/h4≤0.8。
7. top-sucking kitchen ventilator according to claim 6, it is characterised in that：Also include installed in blade (22)
The protecgulum (23) at top, the protecgulum (23) with the meridian plane where impeller shaft intersects is formed in part with from-inner-to-outer
The first arc section (231) of rounding off, the second arc section (232) and straightway (233), first arc section (231) successively
Radius R1 and the second arc section (232) radius R2 between value relation be 0.1≤R1/R2≤0.6, the straight line
Value relation between the section length L of (233) and the radius R2 of the second arc section (232) is 0.1≤L/R2≤0.4.
8. top-sucking kitchen ventilator according to claim 7, it is characterised in that：The blower fan (2) includes described
Three-dimensional flow impeller (20), spiral case (24), motor (25), air intake mouth circle (26) and outlet housing (27), the three-dimensional flow impeller (20)
It is internal installed in spiral case (24), the output shaft of the motor (25) downwards, the rear trochal disc (21) of the three-dimensional flow impeller (20)
On the output shaft of the motor (25), described air intake mouth circle (26) is arranged on the air inlet and and ternary of blower fan (25)
The protecgulum (23) for flowing impeller (20) coordinates and installed, and the air outlet of the blower fan (2) upward and is biased in the assembling chamber (4)
Sidepiece, described outlet housing (27) is arranged on described air outlet.
9. top-sucking kitchen ventilator according to claim 8, it is characterised in that：The rear trochal disc (21) is somebody's turn to do with neighbouring
Spacing δ between the spiral case wall (241) of rear trochal disc is 1mm≤δ≤10mm, and the protecgulum (23) is set in air intake mouth circle
(26) outside, and protecgulum (23) front side edge along and the vertical range Δ between air intake mouth circle (26) lateral wall be 0.5mm≤Δ
≤5mm。
10. top-sucking kitchen ventilator according to claim 8, it is characterised in that：The air-out of the outlet housing (27)
Mouth edge is in lobe type, or is provided with through hole (271) in the air outlet annular wall of outlet housing (27) and makes air outlet annular wall
In mesh-structured.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071510.7A CN107023862B (en) | 2016-02-01 | 2016-02-01 | A kind of top-sucking kitchen ventilator |
| PCT/CN2017/000134 WO2017133371A1 (en) | 2016-02-01 | 2017-01-24 | Ceiling-mounted exhaust hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071510.7A CN107023862B (en) | 2016-02-01 | 2016-02-01 | A kind of top-sucking kitchen ventilator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107023862A true CN107023862A (en) | 2017-08-08 |
| CN107023862B CN107023862B (en) | 2019-11-12 |
Family
ID=59499376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610071510.7A Active CN107023862B (en) | 2016-02-01 | 2016-02-01 | A kind of top-sucking kitchen ventilator |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107023862B (en) |
| WO (1) | WO2017133371A1 (en) |
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| CN111780169A (en) * | 2020-07-28 | 2020-10-16 | 嵊州市浙江工业大学创新研究院 | Integrated kitchen oil smoke cleaning system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595633A (en) * | 2017-09-30 | 2019-04-09 | 宁波方太厨具有限公司 | A kind of range hood |
| CN109595633B (en) * | 2017-09-30 | 2024-01-16 | 宁波方太厨具有限公司 | Fume exhauster |
| CN109780595A (en) * | 2017-11-10 | 2019-05-21 | 宁波方太厨具有限公司 | A kind of range hood |
| CN109780595B (en) * | 2017-11-10 | 2024-01-16 | 宁波方太厨具有限公司 | Fume exhauster |
| CN109990340A (en) * | 2017-12-30 | 2019-07-09 | 宁波方太厨具有限公司 | A kind of high performance range hood |
| CN109990340B (en) * | 2017-12-30 | 2023-11-17 | 宁波方太厨具有限公司 | High-performance range hood |
| CN108019806A (en) * | 2018-01-11 | 2018-05-11 | 广东美的厨房电器制造有限公司 | Range hood |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107023862B (en) | 2019-11-12 |
| WO2017133371A1 (en) | 2017-08-10 |
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