CN215949873U - Centrifugal fan and range hood with same - Google Patents
Centrifugal fan and range hood with same Download PDFInfo
- Publication number
- CN215949873U CN215949873U CN202121181601.9U CN202121181601U CN215949873U CN 215949873 U CN215949873 U CN 215949873U CN 202121181601 U CN202121181601 U CN 202121181601U CN 215949873 U CN215949873 U CN 215949873U
- Authority
- CN
- China
- Prior art keywords
- impeller
- centrifugal fan
- blades
- range hood
- volute
- 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.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a centrifugal fan and a range hood with the same, wherein the centrifugal fan comprises a volute, a driving device, a first impeller and a second impeller; the blades are arranged into a backward tilting blade type, the first impeller and the second impeller are fixedly arranged on an output shaft of a driving device, and the blades of the first impeller and the blades of the second impeller are arranged in a staggered manner in the circumferential direction of a wheel disc of the impeller; still relate to a range hood, including cigarette machine owner case, collection smoke chamber and above-mentioned centrifugal fan. The centrifugal fan and the range hood with the same not only avoid the problem that oil stains are accumulated on the blades to block an air flow channel, but also reduce the noise in the operation process.
Description
Technical Field
The utility model relates to household appliances, in particular to a centrifugal fan and a range hood with the same.
Background
The range hood is a kitchen appliance for purifying the kitchen environment. The range hood generates negative pressure through the rotation of the fan, quickly exhausts the oil smoke and discharges the oil smoke outdoors. In the prior art, the centrifugal fan is widely used in a range hood due to large air volume and excellent performance. The quality of the range hood is determined by the performance of the fan, so that the requirements on the air quantity, the air pressure and the like of the centrifugal fan are higher and higher.
The range hood that sells on the market at present uses many formula multi-wing centrifugal fan that inclines forward, including spiral case, impeller, motor, the blade clearance of impeller is less, and the air runner is many and narrow between the blade, uses a period back at the range hood, easily leads to the greasy dirt to pile up in the blade clearance, causes the blade runner to block up, and then leads to the pneumatic loss of fan, and the cigarette machine amount of wind is showing the decay.
Disclosure of Invention
The utility model provides a centrifugal fan and a range hood, and aims to solve the technical problem that an air flow channel in a blade gap of the existing range hood is easily blocked by oil stains and the air quantity of the range hood is gradually reduced in the use process of the existing range hood.
The centrifugal fan comprises a volute, a driving device, a first impeller and a second impeller, wherein an air inlet and an air outlet are formed in the volute, blades in the first impeller and the second impeller are in a backward tilting blade type, the first impeller and the second impeller are fixedly installed on an output shaft of the driving device, and the blades of the first impeller and the blades of the second impeller are arranged in a staggered mode in the circumferential direction of a wheel disc.
As a further improvement of the technology, the number of the blades on the first impeller and the second impeller is 3-12 respectively, the air suction and exhaust amount is ensured, the blade distance is increased, oil separated from oil smoke is thrown out under the action of centrifugal force, an air channel is not easily blocked, and stable air suction and exhaust amount can be provided for a long time.
As a further improvement of the above technique, a relation between a stagger angle α of projections of the blades of the second impeller and the blades of the first impeller on the same plane and the number n of the blades is: alpha is more than or equal to 0 degree and less than or equal to 360/(n multiplied by 2) degree.
As a further improvement of the above technology, a volute supporting plate is arranged in the volute, and the volute supporting plate divides the space in the volute into a first chamber and a second chamber; the first impeller is disposed in the first chamber and the second impeller is disposed in the second chamber.
As a further improvement of the above technology, a first air inlet and a second air inlet are arranged on the volute, the first air inlet is arranged corresponding to the first chamber, and the second air inlet is arranged corresponding to the second chamber; meanwhile, an air outlet is formed in the volute, the direction of the air outlet is perpendicular to the axial direction of the first air inlet and the second air inlet, and the air outlet is communicated with the first cavity and the second cavity.
As a further improvement of the above technology, the driving device is a dual-shaft output motor, a body of the dual-shaft output motor is mounted on the volute supporting plate, and two output shafts of the dual-shaft output motor respectively extend into the first chamber and the second chamber; the first impeller and the second impeller are respectively connected with two output shafts of the double-shaft output motor.
As a further improvement of the technology, the two output shafts of the double-shaft output motor rotate synchronously and have the same rotating speed.
The range hood provided by the utility model comprises a main box of the range hood, a smoke collection cavity and the centrifugal fan, wherein the centrifugal fan is arranged in the main box.
As a further improvement of the technology, an oil filter screen is arranged at the air suction opening of the smoke collection cavity, the oil filter screen is upwards recessed in a conical shape in the smoke collection cavity, a strong negative pressure area is further formed, the air suction effect is improved, and the phenomena of much oil smoke leakage and suction leakage are avoided.
As a further improvement of the technology, the air outlet at the upper part of the main box of the range hood is designed into a structure which gradually changes from a rectangular shape at the lower end to a circular shape at the upper end, thereby avoiding generating movement dead angles which affect the air flow in the volute, reducing the wind resistance and simultaneously reducing the noise.
Compared with the prior art, the utility model has the beneficial effects that: through designing the impeller blade for retroverted blade type to the blade of first impeller and the blade of second impeller are arranged in the circumferencial direction of impeller rim plate in the staggered way, have avoided the interior greasy dirt of impeller runner to pile up, produce the influence to the runner shape, and the stability that can guarantee the suction and exhaust air volume has correspondingly reduced same frequency noise.
Drawings
FIG. 1 is a perspective view of a centrifugal fan in accordance with an embodiment of the present invention;
FIG. 2 is a front view of a centrifugal fan in an embodiment of the present invention;
FIG. 3 is a perspective view illustrating a dual impeller in one embodiment of the present invention;
FIG. 4 is a schematic view illustrating a projection of a centrifugal fan blade onto the same plane in one embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 6 is a front view of a range hood in accordance with an embodiment of the present invention;
fig. 7 is a sectional view taken along line B-B of fig. 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that if there is a description referring to "first", "second", etc., the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. And therefore should not be construed as limiting the utility model.
As shown in fig. 1 and 2, an embodiment of the present invention provides a centrifugal fan, which includes a volute 10, a driving device 20, a first impeller 31, and a second impeller 33.
An air inlet 105 and an air outlet 109 are arranged on the volute.
The blades of the first impeller 31 and the second impeller 33 are provided in a backward inclined blade shape.
The first impeller 31 and the second impeller 33 are fixedly mounted on the output shaft of the driving device 20, and the blades 311 of the first impeller and the blades 331 of the second impeller are staggered in the circumferential direction of the wheel disc of the impeller, so that the blades 311 and the blades 331 are prevented from passing through the vortex tongue simultaneously in the working process to generate same-frequency noise.
Among them, the backward inclined blade profile is generally designed by making the outlet angle of the impeller smaller than 90 °, that is, the inclined direction of the blade is opposite to the rotation direction of the impeller. Compared with the impeller with the forward-inclined blade profile, the impeller with the backward-inclined blade profile presses air by using the blades and cuts air by using the impeller, the operation noise is reduced, meanwhile, the power curve of the impeller with the backward-inclined blade profile is parabolic, the flow channel is gradually enlarged, fluid can obtain better guidance in the flow channel, and the energy loss is reduced.
The driving device 20 may be provided in one or two, and in the case of one driving device 20, the driving device 20 may drive the first impeller 31 and the second impeller 33 simultaneously; under the condition of two driving devices, the two driving devices are arranged back to back and respectively drive the first impeller 31 and the second impeller 33, and no matter one driving device or the two driving devices, the first impeller 31 and the second impeller 33 can synchronously rotate, so that the centrifugal fan can have larger air suction and exhaust amount.
In this embodiment, in order to avoid oil contamination to accumulate in the blade clearance, and cause the runner to block up, first impeller 31 with the quantity n of blade on the second impeller 33 is 3 ~ 12 respectively, can full play blade's acting ability like this, and the air runner broad between the adjacent blade moreover separates the difficult passageway that blocks up of swirl, can improve flow efficiency, simultaneously, because the blade is arranged comparatively sparsely, is convenient for clear up the scaling. For example, the number of the blades on the first impeller 31 and the second impeller 33 may be set to 6.
As shown in fig. 3 and 4, the stagger of the blades 311 of the first impeller and the blades 331 of the second impeller in the circumferential direction of the disk 333 can be understood as the stagger of the projections on a plane, and the stagger angle of the projection on the same plane of the blades 311 of the first impeller 31 and the blades 331 of the second impeller 33 is α.
In order to reduce noise more favorably, the relationship between the offset angle α and the number of blades n is 0 ° to 360/(n × 2), and in the present embodiment, the offset angle α is 30 °.
As shown in fig. 5, a volute supporting plate 40 is disposed in the volute 10 and divides the inner space of the volute into a first chamber 101 and a second chamber 103, the first impeller 31 is disposed in the first chamber 101, and the second impeller 33 is disposed in the second chamber 103.
The projections of the vanes 311 of the first impeller and the vanes 331 of the second impeller on the volute supporting plate 40 are staggered.
A first air inlet 105, a second air inlet 107 and an air outlet 109 are arranged on the volute 10, the first air inlet 105 is arranged corresponding to the first chamber 101, and the second air inlet 107 is arranged corresponding to the second chamber 103; the direction of the air outlet 109 is perpendicular to the axial direction of the first air inlet 105 and the second air inlet 107, and the air outlet 109 is communicated with the first chamber 101 and the second chamber 103 to realize air outlet together.
In an embodiment of the present invention, the driving device is a dual-output shaft motor, a body of the driving device is installed on the volute casing supporting plate 40, two output shafts of the dual-output shaft motor respectively extend into the first chamber 101 and the second chamber 103, and the first impeller 31 and the second impeller 33 are respectively and fixedly installed on two output shafts of the dual-output shaft motor, so that the first impeller 31 and the second impeller 33 synchronously rotate and rotate at the same speed.
The utility model also provides an embodiment of the range hood on the basis of the centrifugal fan. As shown in fig. 6 and 7, the range hood includes a main box 61 of the range hood, a smoke collection chamber 611 and the centrifugal fan. Specifically, the centrifugal fan is installed in the main box 61 of the range hood, and the first air inlet 105 and the second air inlet 107 of the centrifugal fan are communicated with the air inlet 613 on the smoke collection cavity 611 to introduce the oil smoke; the air outlet 109 is communicated with an air outlet 615 at the upper part of the main box of the range hood to discharge the oil smoke.
Accordingly, the range hood has all the advantages of the centrifugal fan, and the description is omitted.
In addition, the oil filter screen 617 is arranged at the air suction port of the smoke collection cavity, and the oil filter screen 617 is upwards and conically recessed into the smoke collection cavity 611, so that the distance between the oil filter screen 617 and the centrifugal fan can be shortened, the oil filter screen is close to a strong negative pressure area, and when oil smoke enters, the oil smoke is directly acted by the strong negative pressure, so that the air suction effect is improved, the negative pressure area is further formed, and the phenomena of oil smoke leakage and smoke leakage are avoided; the oil filter screen 617 is low at the lower periphery and high in the middle, so that the oil smoke is concentrated when being absorbed, and the oil stain collection efficiency can be improved; in addition, the collected smoke is deep, the oil smoke is absorbed deeply without being blocked, and the lower periphery of the oil filter screen 617 collects oil, so that the collected oil can flow conveniently, the oil can be collected more conveniently, and the oil drops can be avoided from dropping.
Meanwhile, the air outlet 615 at the upper part of the main box of the range hood is designed to be gradually transited from a rectangular shape at the lower end to a circular structure at the upper end, so that dead angles influencing high-speed movement of airflow in a flow channel are avoided, and wind resistance and noise are better reduced.
It can be understood that the centrifugal fan is mainly used in the range hood and can also be used in any other occasions requiring the centrifugal fan as power.
In conclusion, the beneficial effects of the utility model are as follows: the blades in the centrifugal fan are designed into a backward-inclined blade type, the distance between the blades is adjusted, the circulation area of an air channel is increased, the influence on the air performance of the fan due to the accumulation of oil stains on the blades is avoided, and furthermore, the problem that the air volume of the traditional multi-wing centrifugal fan is remarkably reduced in the long-term use process of the range hood is solved; the oil filter screen is upwards and is recessed into the smoke collection cavity in a conical shape, so that the phenomena of more oil leakage smoke and smoke leakage are avoided, the collection of oil is facilitated, and the oil is prevented from dripping; the exhaust outlet of the range hood is designed to be gradually transited from the lower end rectangle to the upper end circular structure, so that dead angles influencing high-speed movement of airflow in the volute are avoided, and wind resistance and noise are reduced better.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a centrifugal fan, includes spiral case, drive arrangement, first impeller and second impeller, be equipped with air intake and air outlet on the spiral case, its characterized in that: the blades in the first impeller and the second impeller are arranged into backward tilting blade types, the first impeller and the second impeller are fixedly arranged on an output shaft of a driving device, and the blades of the first impeller and the blades of the second impeller are arranged in a staggered mode in the circumferential direction of a wheel disc of the impeller.
2. The centrifugal fan of claim 1, wherein: the number of the blades on the first impeller and the second impeller is 3-12 respectively.
3. The centrifugal fan of claim 2, wherein: the relation between the stagger angle alpha of the projection of the blades of the second impeller and the blades of the first impeller on the same plane and the number n of the blades is as follows: alpha is more than or equal to 0 degree and less than or equal to 360/(n multiplied by 2) degree.
4. The centrifugal fan of claim 1, wherein: a volute supporting plate is arranged in the volute and divides the space in the volute into a first chamber and a second chamber; the first impeller is disposed in the first chamber and the second impeller is disposed in the second chamber.
5. The centrifugal fan of claim 4, wherein: a first air inlet and a second air inlet are formed in the volute, the first air inlet is arranged corresponding to the first chamber, and the second air inlet is arranged corresponding to the second chamber; meanwhile, an air outlet is formed in the volute, the direction of the air outlet is perpendicular to the axial direction of the first air inlet and the second air inlet, and the air outlet is communicated with the first cavity and the second cavity.
6. The centrifugal fan of claim 5, wherein: the driving device is a double-shaft output motor, a machine body of the double-shaft output motor is arranged on the volute supporting plate, and two output shafts of the double-shaft output motor respectively extend into the first cavity and the second cavity; the first impeller and the second impeller are respectively connected with two output shafts of the double-shaft output motor.
7. The centrifugal fan of claim 6, wherein: two output shafts of the double-shaft output motor rotate synchronously and have the same rotating speed.
8. A range hood, comprising a main box of the range hood, a smoke collection cavity and the centrifugal fan as claimed in any one of claims 1 to 7, wherein the centrifugal fan is arranged in the main box of the range hood.
9. The range hood of claim 8, wherein: an oil filter screen is arranged at the air suction opening of the smoke collection cavity, and the oil filter screen is upwards recessed into the smoke collection cavity in a conical shape.
10. The range hood of claim 9, wherein: the air outlet at the upper part of the main box of the range hood is designed to be gradually transited from a rectangular shape at the lower end to a circular structure at the upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121181601.9U CN215949873U (en) | 2021-05-28 | 2021-05-28 | Centrifugal fan and range hood with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121181601.9U CN215949873U (en) | 2021-05-28 | 2021-05-28 | Centrifugal fan and range hood with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215949873U true CN215949873U (en) | 2022-03-04 |
Family
ID=80504442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121181601.9U Active CN215949873U (en) | 2021-05-28 | 2021-05-28 | Centrifugal fan and range hood with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215949873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810660A (en) * | 2022-04-15 | 2022-07-29 | 祁华意 | Environment-friendly energy-saving ventilation/air exchange device |
-
2021
- 2021-05-28 CN CN202121181601.9U patent/CN215949873U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810660A (en) * | 2022-04-15 | 2022-07-29 | 祁华意 | Environment-friendly energy-saving ventilation/air exchange device |
| CN114810660B (en) * | 2022-04-15 | 2024-04-30 | 深圳市卓尔智能技术有限公司 | Environment-friendly energy-saving ventilation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2012205133B2 (en) | An impeller arrangement | |
| CN101858613A (en) | Jet flow type smoke exhaust ventilator and fluidic generator thereof | |
| CN215949873U (en) | Centrifugal fan and range hood with same | |
| CN106073631A (en) | A kind of noise reduction structure of motor | |
| CN202273885U (en) | Efficient multi-air-outlet energy-saving explosion-proof fan | |
| CN203098404U (en) | Multistage turbine vacuum pump detachable backflow device | |
| CN102734221A (en) | Diffuser and centrifugal fan equipped with same | |
| CN110552899A (en) | multi-wing centrifugal fan for ventilator with built-in guide vanes | |
| CN116641912A (en) | Labyrinth air seal structure electric centrifugal fan | |
| CN109780596B (en) | Noise reduction flow guiding device and range hood using same | |
| CN109595633B (en) | Fume exhauster | |
| CN109595641B (en) | Fume exhauster | |
| CN215830792U (en) | Impeller assembly, fan and range hood | |
| CN205207221U (en) | Fan | |
| WO2022143328A1 (en) | Centrifugal fan, household appliance, volute, and cooking utensil | |
| CN112377457B (en) | Impeller, centrifugal fan applying same and range hood | |
| CN209908758U (en) | Oil-free vortex air compressor with spiral supercharging speed-increasing heat-dissipating flywheel fan | |
| CN210068521U (en) | Axial fan structure of high-efficient low noise | |
| CN209959559U (en) | Centrifugal blower impeller with anti-surge capacity and centrifugal blower thereof | |
| CN101344099A (en) | Electric driven blower and electric suction cleaner having the same | |
| CN102734222B (en) | Diffuser and be provided with the centrifugal cutter of this Diffuser | |
| CN220286035U (en) | Improved semi-open centrifugal impeller and automobile air conditioner fan using same | |
| CN210769374U (en) | Centrifugal fan | |
| CN215293002U (en) | Impeller assembly, multi-wing centrifugal fan and household appliance | |
| CN207554420U (en) | A kind of backward centrifugal blower and range hood for range hood |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |