CN206338839U - A kind of range hood - Google Patents
A kind of range hood Download PDFInfo
- Publication number
- CN206338839U CN206338839U CN201621390240.8U CN201621390240U CN206338839U CN 206338839 U CN206338839 U CN 206338839U CN 201621390240 U CN201621390240 U CN 201621390240U CN 206338839 U CN206338839 U CN 206338839U
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- CN
- China
- Prior art keywords
- spiral casing
- impeller
- centrifugal blower
- range hood
- ring wall
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of range hood, including exhaust fume collecting hood, fan shroud and the centrifugal blower being placed in fan shroud, the centrifugal blower has air inlet directed downwardly, the centrifugal blower includes outer spiral casing and impeller, the outer spiral casing includes outer spiral casing ring wall, the spiral case protecgulum positioned at bottom and the spiral case bonnet positioned at top, the spiral case bonnet upper shed and the air outlet for forming centrifugal blower, the impeller include multiple blades, it is characterised in that：It is provided with above the impeller between the inner spiral casing of ring wall shape, inner spiral casing and the outer spiral casing ring wall and forms runner.By setting inner spiral casing so that soot gas are gradually assigned to outlet side while oil smoke is around impeller flowing, wheel friction loss can be reduced, while the leakage loss inside blower fan system can be reduced.
Description
Technical field
The utility model is related to a kind of cooking apparatus, especially a kind of range hood.
Background technology
Range hood turns into one of machine for kitchen use equipment indispensable in Modern Family.Range hood is in use state
Under air draft flow depend primarily on the blast of cooking-fume exhauster blower system, blast is bigger, and air draft flow is also bigger.Normal domestic use
Range hood when in use, oil smoke needs to discharge oil smoke by drag devices such as smoke exhaust pipe, check (non-return) valve and discharge flues, this
The presence of a little drag devices so that oil smoke has certain back pressure at oil smoke outlet, and the presence of back pressure can largely effect on oil
The air draft flow of cigarette machine.The blast of blower fan system has a positive effect to the air draft flow of range hood, and the presence of back pressure is then to inhaling
The air draft flow of lampblack absorber plays negative consequence.
Usual range hood includes top suction type and side-suction type, and the range hood of top suction type is empty due to clean and tidy light and handy, occupancy
Between it is small the advantages of, it is and in an increasingly wide range of applications.Top-sucking kitchen ventilator generally includes exhaust fume collecting hood, on exhaust fume collecting hood
Spiral case, impeller and the motor for driving impeller are installed in blower housing, blower housing.
The range hood of conventional top suction type, it is a kind of as disclosed in the Chinese patent of Application No. 201410704669.9 to inhale
Lampblack absorber, including the exhaust fume collecting hood with inlet scoop, are arranged on the wind cabinet on exhaust fume collecting hood top, are arranged on the interior wind for carrying spiral case of wind cabinet
Machine, forms negative pressure by the effect of blower fan, while the gas in wind cabinet is discharged so as to which outside oil smoke is sucked in wind cabinet,
Realize the purpose of fume-exhausting.
Limitation of the existing range hood due to installation dimension and with cabinet dimensional fits, makes the suction inlet of its blower fan system
Or it is vertical with kitchen range plane or in larger angle, it is difficult to suction inlet is realized just to lower section, when oil smoke enters range hood,
Because path is longer, causes loss excessive, when oil smoke amount is excessive, be also easy to the phenomenon for fumes escaping occur.
Utility model content
Technical problem to be solved in the utility model is to be reduced the problem of presence for above-mentioned prior art there is provided one kind
Air loss, the cylindrical range hood for lifting smoke absorption effect.
The utility model solve the technical scheme that is used of above-mentioned technical problem for：A kind of range hood, including exhaust fume collecting hood,
Fan shroud and the centrifugal blower being placed in fan shroud, the centrifugal blower have air inlet directed downwardly, the centrifugal blower bag
Outer spiral casing and impeller are included, the outer spiral casing includes outer spiral casing ring wall, the spiral case protecgulum positioned at bottom and after the spiral case at top
Lid, the spiral case bonnet upper shed and the air outlet for forming centrifugal blower, the impeller includes multiple blades, it is characterised in that：
It is provided with above the impeller between the inner spiral casing of ring wall shape, inner spiral casing and the outer spiral casing ring wall and forms runner.
It is preferred that, the molded line of the inner spiral casing includes interior spiral pieces.
It is preferred that, to improve the efficiency of inner spiral casing, the interior spiral pieces are obtained by equation below：
Wherein, θ 0 is the initial angle of inner spiral casing, and C2m is component of the impeller outlet speed in axial direction, and C2u is impeller outlet speed
The component in circumferencial direction is spent, R2 is impeller outer diameter；R0 is outer spiral casing ring wall diameter；R is the corresponding interior spiral pieces of any angle θ
Radius；B0 adds the anterior diastema between spiral case protecgulum for width of blade, and B is inner spiral casing width.
Directly inhale in line to realize, the outlet of the outer spiral casing ring wall and inner spiral casing and the air outlet pair of the centrifugal blower
Should, it is provided with air-out mouth mask above the air outlet.
To avoid oil vapor backstreaming, connecting plate is provided between the outlet of the outer spiral casing ring wall and inner spiral casing, so as to close
The outlet of outer spiral casing ring wall and inner spiral casing radial direction.
In order that the oil smoke obtained inside fan shroud is not easy accumulation, it is easy to oil smoke to be preferably flowed into lubricating cup, the wind
Hood is in cylinder.
For ease of oil smoke air-flow is directed on centrifugal blower, the air inlet and exhaust fume collecting hood of the centrifugal blower from exhaust fume collecting hood
The ring-type conducting element tapered into from the bottom to top is provided between the air inlet opened up.
For ease of to filtering oil smoke and rectification, filter screen is provided with below the air inlet of the centrifugal blower, in conducting element.
Compared with prior art, the utility model has the advantage of：By setting inner spiral casing so that oil smoke surrounds impeller stream
Soot gas are gradually assigned to outlet side while dynamic, wheel friction loss can be reduced, while blower fan system can be reduced
Leakage loss inside system；Realize and directly inhale in line smoke absorption effect, can be with the oil suction smoke performance of significant increase lampblack absorber；Wind
Cylindrical type is presented in hood, and internal oil smoke is not easy accumulation, is easy to oil smoke to be preferably flowed into lubricating cup.
Brief description of the drawings
Fig. 1 is the schematic diagram of range hood of the present utility model；
Fig. 2 is the sectional view of range hood of the present utility model；
Fig. 3 is the partial schematic diagram of range hood of the present utility model；
Fig. 4 is the partial schematic diagram of range hood of the present utility model；
Fig. 5 is Fig. 3 decomposition texture schematic diagram；
Fig. 6 is the sectional view of the centrifugal blower of range hood of the present utility model；
Fig. 7 is the top view (hiding spiral case bonnet) of range hood of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
Referring to Fig. 1~Fig. 5, a kind of range hood, including exhaust fume collecting hood 1, fan shroud 2 and centrifugal blower 4, during fan shroud 2 is in
Hollow-cylindrical, centrifugal blower 4 is placed in fan shroud 2, and blower hood 3 is then placed in the periphery of fan shroud 2.The air-out of centrifugal blower 4
Air-out mouth mask 6 is provided with mouthful.The bottom rear of exhaust fume collecting hood 1 is provided with lubricating cup 7.Because cylinder is presented in the profile of fan shroud 2
Type, without corner angle, therefore internal oil smoke is not easy accumulation, is easy to oil smoke to be preferably flowed into lubricating cup, range hood pattern
Novelty, modern science and technology sense is strong, with larger market value.
The bottom rear of exhaust fume collecting hood 1, which is provided with lubricating cup 5, exhaust fume collecting hood 1, offers air inlet 11, centrifugal blower 4 to be horizontal,
Its air inlet 41 down, is provided between the air inlet 41 of centrifugal blower 4 and the air inlet 11 of exhaust fume collecting hood 1 and gradually become from the bottom to top
Small ring-type conducting element 5, to guide oil smoke air-flow to enter from exhaust fume collecting hood 1 in centrifugal blower 4.Under the air inlet 41 of centrifugal blower 4
Filter screen 12 is provided with side, conducting element 5.Oil smoke is produced and with the upward ascension of certain speed, oil suction immediately below range hood
Cigarette machine suction inlet (air inlet 11, the air inlet 41 of centrifugal blower 41 on exhaust fume collecting hood 1) is directly just to oil smoke so that oil smoke is not
Just it is inhaled into by any turn in range hood.Oil smoke is once filtered by filter screen 12, while filter screen 12 may be used also
With to fume-exhausting carry out rectification, improve centrifugal blower 4 inflow condition, oil smoke enter centrifugal blower 4 in, carry out secondary filter and
Energy lift.Oil smoke from centrifugal blower 4 out, is discharged by air-out mouth mask 6.Thus achieve and directly inhale in line fume-exhausting
Effect, can be with the oil suction smoke performance of significant increase lampblack absorber.
Centrifugal blower 4 includes outer spiral casing 42, impeller 43, inner spiral casing 44 and the motor 45 for driving impeller 43, impeller 43
Including multiple blades 431, outer spiral casing 42 includes outer spiral casing ring wall 421, the spiral case protecgulum 422 positioned at bottom, the snail positioned at top
Shell bonnet 423.Opening is offered on spiral case protecgulum 422 to form the air inlet 41 of above-mentioned centrifugal blower 4, spiral case bonnet 423
On offer opening to form the air outlet 48 of centrifugal blower 4, air-out mouth mask 6 is corresponding with air outlet 48.
Wheel disc 46 is provided with impeller 43, motor 45 is arranged on the top of impeller 43, and the output shaft connection of motor 45
To wheel disc 46, so that motor 45 can drive impeller 43 to rotate.Motor 45 is consolidated by electric machine support 451 and spiral case bonnet 423
It is fixed.The above-mentioned structure of this centrifugal blower 4, the air inlet directly mode directed downwardly of use, therefore during the rotation of impeller 43, due to used
Property effect, entrance can one prewhirling effect of self-assembling formation, when the oil smoke impulse force of rising is not very strong, it can be seen that oily
The state that volume is inhaled can be presented in cigarette so that the form of cyclone is presented in suction oil smoke, and further enhance oil smoke gathers effect, by force
The effect of fume-exhausting is changed.
Inner spiral casing 44 is the ring wall similar with outer spiral casing ring wall 421, is arranged on the top of impeller 43, and positioned at outer spiral casing
The inner side of ring wall 421, the outside of motor 45.The outlet of inner spiral casing 44 is corresponding with the outlet port of outer spiral casing 42, and inner spiral casing 44
Connecting plate 47 is provided between the two ends in exit, between the two ends in the exit of outer spiral casing 42, by inner spiral casing 44 and outer spiral casing 42
Outlet diametrically close, prevent oil smoke airflow reflux.The flow path of oil smoke air-flow is substantially presented such as the arrow institute in Fig. 2
Show, air-flow passes through impeller 43 from radially flowing out, then along between the inner side of outer spiral casing ring wall 421 and the inner side of inner spiral casing 44
Runner 49 is gradually arranged to outlet, and due to the suction mouth down of impeller 43, therefore air-flow is in the outlet of outer spiral casing 42 and inner spiral casing 44
Place gradually turns to axially discharge by radial direction.
The molded line of outer spiral casing ring wall 421 can use prior art, be formed between inner spiral casing 44 and outer spiral casing ring wall 421
Flow area is designed by the swirl distribution of air stream outlet, after the molded line of outer spiral casing ring wall 421 is determined, by from leaf
The air-flow circular rector of the outlet of wheel 43, just can determine the molded line of inner spiral casing 44.Outer spiral casing 42 and inner spiral casing 44 reclaim the dynamic of impeller 43
Can, static energy is translated into, according to Bernoulli equation, reclaiming kinetic energy must just make it that section expands, speed reduction, thus
Static energy can be converted kinetic energy into.And the principle of inner spiral casing 44 is just so that oil smoke is surrounded soot gas while impeller flows
Outlet side is gradually assigned to, wheel friction loss can be reduced, while the leakage loss inside centrifugal blower 4 can be reduced.
The molded line of inner spiral casing 44 is obtained based on the constant Theoretical Design of circular rector, including the interior spiral pieces 442 extended by snail tongue 441.
Referring to Fig. 6 and Fig. 7, the determination mode of the interior spiral pieces 442 of the molded line of inner spiral casing 44 is：
Wherein, θ 0 is the initial angle of inner spiral casing 44, and C2m is component of the muzzle velocity of impeller 43 in axial direction, can be according to wind
Amount and the number of blade calculate, C2u be the muzzle velocity of impeller 43 in the component of circumferencial direction, can be according to blade angle, rotating speed, wind
Amount is calculated；R2 is the external diameter of impeller 43；R0 is the diameter of outer spiral casing ring wall 421；R is the corresponding interior spiral pieces 442 half of any angle θ
Footpath；B0 is the width of blade 431 plus the anterior diastema between spiral case protecgulum 422；B is the width of inner spiral casing 44.
Claims (8)
1. a kind of range hood, including exhaust fume collecting hood (1), fan shroud (2) and the centrifugal blower (4) that is placed in fan shroud (2),
The centrifugal blower (4) has air inlet directed downwardly (41), and the centrifugal blower (4) includes outer spiral casing (42) and impeller (43),
The outer spiral casing (42) includes outer spiral casing ring wall (421), spiral case protecgulum (422) and the spiral case bonnet positioned at top positioned at bottom
(423), spiral case bonnet (423) upper shed and form the air outlets (48) of centrifugal blower (4), the impeller (43) includes many
Individual blade (431), it is characterised in that：The inner spiral casing (44) of ring wall shape, the inner spiral casing are provided with above the impeller (43)
(44) runner (49) is formed between outer spiral casing ring wall (421).
2. range hood as claimed in claim 1, it is characterised in that：The molded line of the inner spiral casing (44) includes interior spiral pieces
(442)。
3. range hood as claimed in claim 2, it is characterised in that：The interior spiral pieces (442) are obtained by equation below：
Wherein, θ 0 is the initial angle of inner spiral casing (44), and C2m is component of impeller (43) muzzle velocity in axial direction, and C2u is impeller
(43) muzzle velocity is in the component of circumferencial direction, and R2 is impeller (43) external diameter；R0 is outer spiral casing ring wall (421) diameter；R is any
Corresponding interior spiral pieces (442) radius of angle, θ；B0 is blade (431) width plus between preceding between spiral case protecgulum (422)
Gap, B is inner spiral casing (44) width.
4. range hood as claimed in claim 1, it is characterised in that：The outer spiral casing ring wall (421) and inner spiral casing (44)
Outlet is corresponding with the air outlet (48) of the centrifugal blower (4), and air-out mouth mask (6) is provided with above the air outlet (48).
5. range hood as claimed in claim 4, it is characterised in that：The outer spiral casing ring wall (421) and inner spiral casing (44)
Connecting plate (47) is provided between outlet, so as to close the outlet of outer spiral casing ring wall (421) and inner spiral casing (44) radial direction.
6. such as range hood according to any one of claims 1 to 5, it is characterised in that：The fan shroud (2) is in cylinder.
7. such as range hood according to any one of claims 1 to 5, it is characterised in that：The air inlet of the centrifugal blower (4)
(41) the ring-type conducting element (5) tapered into from the bottom to top is provided between the air inlet (11) and on exhaust fume collecting hood (1) opened up.
8. range hood as claimed in claim 7, it is characterised in that：The air inlet lower section of the centrifugal blower (4), conducting element
(5) filter screen (12) is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621390240.8U CN206338839U (en) | 2016-12-16 | 2016-12-16 | A kind of range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621390240.8U CN206338839U (en) | 2016-12-16 | 2016-12-16 | A kind of range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206338839U true CN206338839U (en) | 2017-07-18 |
Family
ID=59302537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621390240.8U Withdrawn - After Issue CN206338839U (en) | 2016-12-16 | 2016-12-16 | A kind of range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206338839U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524263A (en) * | 2016-12-16 | 2017-03-22 | 宁波方太厨具有限公司 | Range hood |
| CN109519416A (en) * | 2017-09-19 | 2019-03-26 | 宁波方太厨具有限公司 | A kind of centrifugal blower |
-
2016
- 2016-12-16 CN CN201621390240.8U patent/CN206338839U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524263A (en) * | 2016-12-16 | 2017-03-22 | 宁波方太厨具有限公司 | Range hood |
| CN106524263B (en) * | 2016-12-16 | 2018-11-23 | 宁波方太厨具有限公司 | A kind of range hood |
| CN109519416A (en) * | 2017-09-19 | 2019-03-26 | 宁波方太厨具有限公司 | A kind of centrifugal blower |
| CN109519416B (en) * | 2017-09-19 | 2024-01-16 | 宁波方太厨具有限公司 | Centrifugal fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170718 Effective date of abandoning: 20181123 |