CN210164695U - Fan structure and range hood applying same - Google Patents
Fan structure and range hood applying same Download PDFInfo
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- CN210164695U CN210164695U CN201920810100.9U CN201920810100U CN210164695U CN 210164695 U CN210164695 U CN 210164695U CN 201920810100 U CN201920810100 U CN 201920810100U CN 210164695 U CN210164695 U CN 210164695U
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- 230000004888 barrier function Effects 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims description 21
- 238000005507 spraying Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 4
- 241000237858 Gastropoda Species 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model discloses a fan structure and use its range hood, this fan structure, including spiral case, air outlet, impeller, spiral tongue and air curtain device, outside the impeller was located to the spiral case cover, on the spiral case was located to the air outlet, the spiral tongue formed at the afterbody of spiral case, and located the below position of air outlet, and the air curtain device was used for forming the air curtain barrier to spiral tongue blowout air current. After the technical scheme is adopted, the utility model discloses a set up the air curtain device, form the air curtain barrier to snail tongue blowout air current to reduce the backward flow phenomenon, promote fan efficiency and static pressure, noise reduction.
Description
Technical Field
The utility model relates to a range hood technical field especially relates to a fan structure and use its range hood.
Background
The fan of the present household range hood basically adopts a multi-blade centrifugal fan, and is characterized by large flow, large pressure and small volume. The blower has volute tongue to reduce back flow and prevent partial gas from circulating inside the volute. The degree of backflow is primarily dependent on the clearance between the volute tongue and the impeller. The smaller the gap, the smaller the backflow, the higher the efficiency and pressure of the fan system, but the more noise. Considering performance indexes such as flow, efficiency, pressure, noise and the like, the clearance between the volute tongue and the impeller of the common range hood can be larger, the clearance is about 5% -10% of the diameter of the wind wheel, at the moment, the backflow condition is serious, but the noise is relatively small. The backflow conditions of the range hood under different working conditions are completely different, and the optimal gap value under each working condition is different.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a fan structure and use its range hood, it can overcome above-mentioned defect, reduces the backward flow phenomenon, improves fan efficiency.
The utility model adopts the technical proposal that:
a fan structure comprises a volute, an air outlet, an impeller, a volute tongue and an air curtain device, wherein the volute is sleeved outside the impeller, the air outlet is formed in the volute, the volute tongue is formed at the tail of the volute and is arranged below the air outlet, and the air curtain device is used for spraying air flow to the volute tongue to form an air curtain barrier.
In the above technical scheme, the air curtain device includes a gas collecting box and an air curtain spray bar, the air curtain spray bar is provided with an air jet corresponding to the volute tongue, the gas collecting box is communicated with the air curtain spray bar and is used for sucking air to make the air flow sprayed out from the air jet of the air curtain spray bar, and the air curtain spray bar is arranged on the volute in a penetrating manner and is close to the outermost end of the impeller.
In the technical scheme, the air nozzles are waist-shaped holes, and the air curtain spray bars are provided with at least one air nozzle.
In the technical scheme, the width of the air jet is set to be 2-4 mm.
In the technical scheme, the air jet ports are round holes and are arranged on the air curtain spraying strips at intervals.
In the technical scheme, the air curtain spray bars are in a long-strip cylindrical shape, one end of each air curtain spray bar is arranged in a closed mode, and the other end of each air curtain spray bar is provided with an air inlet.
In the above technical scheme, one end of the gas collection box is an open end, the other end of the gas collection box is provided with the gas outlet and connected with the gas inlet, and the open end of the gas collection box is provided with the fan for sucking air.
In the above technical scheme, the air outlet is connected with the air inlet through a hose.
In the above technical solution, the fan is a high-speed booster fan.
A range hood comprises the fan structure.
After the technical scheme is adopted, the utility model discloses a set up the air curtain device, form the air curtain barrier to snail tongue blowout air current to reduce the backward flow phenomenon, promote fan efficiency and static pressure, noise reduction.
Drawings
Fig. 1 is a schematic view of the internal structure of a fan according to the present invention;
fig. 2 is a schematic diagram of the internal structure of the fan of the present invention;
FIG. 3 is a partial enlarged view of FIG. 2A;
fig. 4 is a schematic perspective view of the gas collecting box of the present invention;
fig. 5 is a first schematic view of a three-dimensional mechanism of the air curtain spray bar of the present invention;
fig. 6 is a schematic view of a three-dimensional mechanism of the air curtain strip of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1, the utility model discloses a fan structure, including spiral case 4, air outlet 41, impeller 1, spiral tongue 2 and air curtain device 3, wherein:
referring to fig. 1, the volute 4 is sleeved outside the impeller 1, the air outlet 41 is disposed on the volute 4, the volute tongue 2 is formed at the tail of the volute 4 and disposed below the air outlet 41, and the air curtain device 3 is configured to spray air flow to the volute tongue 2 to form an air curtain barrier.
Referring to fig. 1, 2 and 3, the air curtain device 3 includes a gas collecting box 31 and an air curtain spray bar 32, one end of the gas collecting box 31 is an open end, the other end is provided with an air outlet 311, the open end of the gas collecting box 31 is provided with a fan 312, and the fan 312 is a high-speed booster fan for sucking air; as shown in fig. 5, the air curtain nozzle strip 32 is a long cylindrical shape, the diameter range is set to 6-12 mm, one end of the air curtain nozzle strip is closed, the other end is provided with an air inlet 321 communicated with the air outlet 311 through a hose, the air curtain nozzle strip 32 is arranged in the volute 4 in a penetrating manner and is abutted against the outermost end of the impeller 1, so that the air flow passing through between the air curtain nozzle strip 32 and the impeller 1 is reduced; the air curtain spraying strip 32 is provided with an air nozzle 322 opposite to the volute tongue 2, the air nozzle 322 is a waist-shaped hole, the air curtain spraying strip 32 is provided with at least one air nozzle 322 opposite to the volute tongue 2 and used for spraying air flow to the volute tongue 2 to form an air curtain barrier, in the embodiment, the air curtain spraying strip 32 is provided with three waist-shaped hole air nozzles 322 opposite to the volute tongue 2, and the width of the air nozzle 322 is set to be 2-3 mm.
When the air-curtain-type air-collecting box is used, the fan 312 at the opening end of the air-collecting box 31 runs at a high speed to suck in external air, the air flows into the air-curtain spraying strips 32 through the connection of the air outlet 311 and the air inlet 321 and is sprayed out from the air spraying ports 322 at a high speed to form an air-curtain barrier to block airflow backflow in the volute 4, so that the backflow phenomenon is reduced, and the efficiency and static pressure of a fan are improved; in addition, the strength of the air curtain (namely the air injection speed) can be adjusted according to different operation conditions of the fan, so that the best matching is achieved.
Example two:
referring to fig. 6, the difference between the present embodiment and the first embodiment is characterized in that: the air outlets 322 are circular holes and are disposed on the air curtain nozzle strip 32 at intervals, so that the ejected air flow forms an air curtain barrier.
The utility model discloses still disclose a range hood, fan structure including embodiment one or embodiment two.
The utility model discloses a set up air curtain device 3, form the air curtain barrier to 2 blowout air currents of snail tongue to reduce the backward flow phenomenon, promote fan efficiency and static pressure, noise reduction.
The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.
Claims (10)
1. The fan structure is characterized by comprising a volute (4), an air outlet (41), an impeller (1), a volute tongue (2) and an air curtain device (3), wherein the volute (4) is sleeved outside the impeller (1), the air outlet (41) is formed in the volute (4), the volute tongue (2) is formed in the tail portion of the volute (4) and is arranged below the air outlet (41), and the air curtain device (3) is used for spraying air flow to the volute tongue (2) to form an air curtain barrier.
2. The fan structure according to claim 1, wherein the air curtain device (3) includes a gas collecting box (31) and an air curtain spray bar (32), the air curtain spray bar (32) is provided with an air jet (322) corresponding to the volute tongue (2), the gas collecting box (31) is communicated with the air curtain spray bar (32) and is used for sucking air so that the air flow is sprayed out from the air jet (322) of the air curtain spray bar (32), and the air curtain spray bar (32) is arranged on the volute (4) in a penetrating manner and is abutted against the outermost end of the impeller (1).
3. The fan structure according to claim 2, wherein the air injection ports (322) are kidney-shaped holes, and the air curtain nozzle strip (32) is provided with at least one air injection port (322).
4. A fan structure according to claim 3, characterized in that the width of the air jet (322) is set to 2-3 mm.
5. The fan structure according to claim 2, wherein the air injection ports (322) are circular holes and are arranged on the air curtain spray bars (32) at intervals.
6. A fan structure according to any one of claims 2-5, characterized in that the air curtain spray bars (32) are in the shape of long cylinders, one end of each air curtain spray bar is closed, and the other end of each air curtain spray bar is provided with an air inlet (321).
7. A fan structure according to claim 6, characterized in that one end of the air collecting box (31) is an open end, the other end is provided with an air outlet (311) connected with the air inlet (321), and the open end of the air collecting box (31) is provided with a fan (312) for sucking air.
8. A fan structure according to claim 7, characterized in that the air outlet (311) and the air inlet (321) are connected by a hose.
9. A fan structure according to claim 8, characterized in that the fan (312) is a high-speed booster fan.
10. A range hood, characterized in that it comprises a fan structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920810100.9U CN210164695U (en) | 2019-05-31 | 2019-05-31 | Fan structure and range hood applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920810100.9U CN210164695U (en) | 2019-05-31 | 2019-05-31 | Fan structure and range hood applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210164695U true CN210164695U (en) | 2020-03-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920810100.9U Active CN210164695U (en) | 2019-05-31 | 2019-05-31 | Fan structure and range hood applying same |
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| Country | Link |
|---|---|
| CN (1) | CN210164695U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251280A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
-
2019
- 2019-05-31 CN CN201920810100.9U patent/CN210164695U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251280A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal fan, air outlet control method and device and range hood |
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