CN110107932B - Double-air-inlet range hood - Google Patents
Double-air-inlet range hood Download PDFInfo
- Publication number
- CN110107932B CN110107932B CN201910311611.0A CN201910311611A CN110107932B CN 110107932 B CN110107932 B CN 110107932B CN 201910311611 A CN201910311611 A CN 201910311611A CN 110107932 B CN110107932 B CN 110107932B
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- China
- Prior art keywords
- air inlet
- air
- impeller
- range hood
- air outlet
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- 230000009467 reduction Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 3
- 239000012530 fluid Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000779 smoke Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010013954 Dysphoria Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 206010033557 Palpitations Diseases 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- F24C15/2021—Arrangement or mounting of control or safety systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Ventilation (AREA)
Abstract
The utility model provides a two air inlet range hoods, includes fan frame and collection petticoat pipe, and fan frame internally mounted has centrifugal fan, and centrifugal fan has left side air inlet and right side air inlet, is equipped with the air intake on the collection petticoat pipe, and fan frame top is equipped with air outlet, its characterized in that: the air inlet and the air outlet are positioned on the same side of the vertical central line of the impeller, the front-back width Y of the projection overlapping area of the inner diameters of the air inlet, the air outlet and the impeller on the vertical projection plane is equal to the front-back width X1 of the air inlet, the front-back width X2 of the air outlet and the inner diameter D of the impeller, and Y/X1 is more than 0.3, Y/X2 is more than 0.3 and Y/D is more than 0.3. The invention has the advantages that: the projection of the inner diameters of the air inlet, the air outlet and the impeller of the double-air-inlet range hood on the vertical projection plane meets the requirements of Y/X1>0.3, Y/X2>0.3 and Y/D >0.3, so that an air duct is smoother, when the fluid of the air inlet points to the inlet of a fan, the fluid of the air inlet is perpendicular to the lower flow dividing plate, the flow dividing effect is good, and the path of a large-flow area is short and smooth.
Description
Technical Field
The invention relates to a range hood, in particular to a double-air-inlet range hood.
Background
Chinese cooking can generate a large amount of oil smoke, and in order to keep the kitchen environment clean and the health of human bodies, the range hood has become one of the indispensable devices of modern family kitchens. In the operation process of the range hood, turbulent flow is generated by air flow movement to generate noise, the main source of the noise is a fan of the range hood, when the fan works, the separation of high-speed air flow on an impeller and the impact on a volute become main generation reasons of the noise, and when a user cooks, the user is influenced by the noise, and discomfort such as headache, dysphoria or palpitation can be generated to influence the cooking experience and the physical health of people. In addition, for the range hood with the double air inlet structure, in the operation process of the range hood, the oil smoke flows from bottom to top under the action of the fan, and flows leftwards and rightwards to the fan inlet under the action of the attached wall of the splitter plate after encountering the splitter plate. The coanda effect, also known as the coanda effect, refers to the tendency of a fluid to flow away from the original direction of flow, but instead to follow a convex object surface, where there is surface friction (i.e., fluid viscosity) between the fluid and the object surface over which it flows, so long as the curvature is appropriate, the fluid will flow along the object surface. Therefore, the position relation and the structure of the lower flow dividing plate of the fan air inlet, the air outlet and the volute directly determine whether the oil smoke channel is unobstructed, and further the oil smoke absorbing effect of the range hood is affected.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a double-air-inlet range hood with a smoother internal air duct aiming at the prior art.
The second technical problem to be solved by the invention is to provide a double-air-inlet range hood with good flow dividing effect and small flow loss aiming at the prior art
The technical scheme adopted by the invention for solving the first technical problem is as follows: this two intake range hoods, including the fan frame and locate the collection petticoat pipe of fan frame below, fan frame internally mounted has centrifugal fan, centrifugal fan includes the spiral case and installs the impeller inside the spiral case, and centrifugal fan has left side air inlet and right side air inlet, is equipped with the air intake on the collection petticoat pipe, and fan frame top is equipped with the air outlet, its characterized in that: the air inlet and the air outlet are positioned on the same side of the vertical central line of the impeller, and the front-back width Y of the projection coincidence area of the inner diameters of the air inlet, the air outlet and the impeller on the vertical projection plane is equal to the front-back width X1 of the air inlet, the front-back width X2 of the air outlet and the inner diameter D of the impeller, wherein Y/X1 is more than 0.3, Y/X2 is more than 0.3 and Y/D is more than 0.3.
Preferably, the air inlet and the air outlet are arranged on the front side of the vertical central line of the impeller, and the air outlet is arranged right above the air inlet.
The volute has a lower diverter plate with a lower ridge MN sloping obliquely downward from front to back.
Preferably, the radius of the bottom front edge R of the lower manifold is smaller than the radius of the rear edge R. Therefore, under the condition of the flow, the flow velocity at the rear is improved, namely the wind velocity in a small flow area is improved, so that the oil smoke can enter the fan quickly.
Further preferably, the radius of the lower diverter plate bottom front edge R and the radius of the rear edge R satisfy 3.5< R/R <4.5.
As another preferred solution, the radii of the front and rear edges R, R of the bottom of the lower manifold plate are equal. Therefore, the volute is made of less sheet metal material waste, is easier to manufacture, reduces the production cost and has better stability.
The technical scheme adopted by the invention for solving the second technical problem is that the straight line OB passing through the midpoint B and the impeller center O in the front-back direction of the air inlet of the double-air-inlet range hood is mutually perpendicular to the lower edge line MN of the lower flow dividing plate. Therefore, when the fluid at the air inlet points to the inlet of the fan, the fluid is perpendicular to the lower flow dividing plate, the flow dividing effect is good, and the path of the large-flow area is short and smooth.
In order to further improve the shunting effect, the perpendicular point K between the straight line OB and the lower edge line MN, the perpendicular point P between the straight line OP passing through the front point a of the air inlet and the lower edge line MN, and the perpendicular point Q between the straight line CQ passing through the rear point C of the air inlet and the lower edge line MN satisfy the following relationships: d/2-30< PK < D/2+50, D/2-30< QK < D/2+80.
Further preferably, the pk=qk=d/2-16.8.
In order to further improve the flow dividing effect, the included angle theta between the straight line OA passing through the front point A of the air inlet and the center O of the impeller and the straight line OC passing through the rear point C of the air inlet and the center O of the impeller meets 15 DEG < theta <30 DEG, and the included angle beta between the straight line OA and the lower edge line MN meets 65 DEG < beta <90 deg.
In order to reduce fan noise, noise reduction holes are formed in the annular wall of the volute.
Compared with the prior art, the invention has the advantages that: the air inlet and the air outlet of the double-air-inlet range hood are positioned on the same side of the vertical central line of the impeller, and the front-back width Y of the projection superposition area of the air inlet, the air outlet and the inner diameter of the impeller on the vertical projection surface, the front-back width X1 of the air inlet, the front-back width X2 of the air outlet and the inner diameter D of the impeller meet the following requirements: Y/X1>0.3, Y/X2>0.3 and Y/D >0.3, so that the air duct is smoother, and when the fluid at the air inlet is directed to the inlet of the fan, the fluid is perpendicular to the lower flow dividing plate, the flow dividing effect is good, and the path of the large-flow area is short and smooth.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
fig. 2 is an internal structural view of a range hood according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a fan structure according to a first embodiment of the present invention;
FIG. 4 is a cross-sectional view of a first embodiment of the present invention;
FIG. 5 is a cross-sectional view of a first embodiment of the present invention;
FIG. 6 is a cross-sectional view of a first embodiment of the present invention;
fig. 7 is a schematic diagram of a fan structure according to a second embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Embodiment one:
as shown in fig. 1 and 2, the dual-air-intake range hood of the present embodiment includes a fan frame 1 and a fume collecting hood 2 disposed below the fan frame, a centrifugal fan 3 is mounted inside the fan frame 1, the centrifugal fan 3 includes a volute 31 and an impeller 32 mounted inside the volute, the centrifugal fan 3 has a left air inlet 33 and a right air inlet 34, an air inlet 4 is disposed on the fume collecting hood 2, and an air outlet 5 is disposed at the top of the fan frame 1. The structure is the same as that of the existing double-air-inlet range hood.
As shown in fig. 4, with the direction indicated by arrow a in fig. 4 as the forward direction, the air inlet 4 and the air outlet 5 are located at the front side of the vertical center line of the impeller, and the air outlet 5 is located directly above the air inlet 4. Further, the overlap ratio of the inner diameters of the air inlet 4, the air outlet 5 and the impeller 32 on the vertical projection plane is at least 30%, that is, the front-back width Y of the projection overlap area of the inner diameters of the air inlet 4, the air outlet 5 and the impeller 32 on the vertical projection plane is equal to the front-back width X1 of the air inlet 4, the front-back width X2 of the air outlet 5 and the inner diameter D of the impeller, and Y/X1>0.3, Y/X2>0.3 and Y/D >0.3 are satisfied.
As shown in fig. 2 and 3, the scroll casing 31 has a lower diverting plate 311 at the bottom, and a lower ridge MN of the lower diverting plate 311 is inclined obliquely downward from front to rear. In addition, the radius of the bottom front edge R of the lower splitter plate 311 is smaller than the radius of the rear edge R, and in the optimal scheme, the radius of the bottom front edge R of the lower splitter plate 311 and the radius of the rear edge R satisfy 3.5< R/R <4.5, and accordingly, it can be obtained that, if on the same horizontal plane H, the rear air intake gap L2 at the rear edge of the lower splitter plate 311 is smaller than the front air intake gap L1 at the front edge. According to the fluid continuity equation, the wind speed V=Q/S, Q is the flow, S is the section, and the wind speed at the rear side part of the fan is improved under the flow, so that the wind speed in a small flow area is improved, and the oil smoke is enabled to enter the fan rapidly.
As shown in fig. 5, the included angle θ between the straight line OA passing through the front point a of the air inlet 4 and the impeller center O and the straight line OC passing through the rear point C of the air inlet 4 and the impeller center O satisfies 15 ° < θ <30 °, and the included angle β between the straight line OA and the lower edge MN satisfies 65 ° < β <90 °.
As shown in fig. 6, a straight line OB passing through the midpoint B of the air intake 4 in the front-rear direction and the impeller center O is perpendicular to the lower ridge MN of the lower flow dividing plate 31. The following relationship is satisfied by the perpendicular point K of the straight line OB and the lower ridge MN, the perpendicular point P of the straight line OP passing through the front point a of the air inlet 4 and the lower ridge MN, and the perpendicular point Q of the straight line CQ passing through the rear point C of the air inlet 4 and the lower ridge MN: d/2-30< PK < D/2+50, D/2-30< QK < D/2+80. The optimal scheme is as follows: pk=qk=d/2-16.8
In addition, in order to reduce fan noise, the volute annular wall 312 of the present embodiment is provided with a noise reduction hole 313, and the noise reduction hole 313 is distributed over the entire volute annular wall.
Embodiment two:
as shown in fig. 7, the radius of the bottom front edge R and the rear edge R of the lower diverter plate 311 of the scroll case of the present embodiment are equal. Thus, the volute 3 is made of less sheet metal material waste, is easier to manufacture, reduces the production cost and has better stability. The remaining structure of this embodiment is the same as that of the first embodiment, and will not be described here.
Claims (8)
1. The utility model provides a double air inlet range hood, includes fan frame (1) and locates collection petticoat pipe (2) of fan frame below, fan frame (1) internally mounted has centrifugal fan (3), centrifugal fan (3) include spiral case (31) and install impeller (32) inside the spiral case, and centrifugal fan (3) have left side air inlet (33) and right side air inlet (34), are equipped with air intake (4) on collection petticoat pipe (2), and fan frame (1) top is equipped with air outlet (5), its characterized in that: the air inlet (4) and the air outlet (5) are positioned on the same side of the vertical central line of the impeller, the front-back width Y of the projection coincidence area of the inner diameters of the air inlet (4), the air outlet (5) and the impeller (32) on the vertical projection plane, the front-back width X1 of the air inlet (4), the front-back width X2 of the air outlet (5) and the inner diameter D of the impeller meet the requirements of Y/X1>0.3, Y/X2>0.3 and Y/D >0.3, the air inlet (4) and the air outlet (5) are arranged on the front side of the vertical central line of the impeller, the air outlet (5) is positioned right above the air inlet (4), and a noise reduction hole (313) is formed in a ring wall (312) of the volute (31).
2. The dual intake range hood of claim 1, wherein: the scroll casing (31) has a lower flow dividing plate (311), and a lower ridge line MN of the lower flow dividing plate (311) is inclined obliquely downward from front to back.
3. The double air intake range hood according to claim 2, wherein: the radius of the bottom front edge R of the lower splitter plate (311) is smaller than the radius of the rear edge R.
4. A dual intake range hood according to claim 3, wherein: the radius of the bottom front edge R and the radius of the rear edge R of the lower splitter plate (311) satisfy 3.5< R/R <4.5.
5. The double air intake range hood according to claim 2, wherein: the radius of the front edge R and the radius of the rear edge R of the bottom of the lower flow dividing plate (311) are equal.
6. The double air intake range hood according to claim 2, wherein: a straight line OB passing through a midpoint B of the air inlet (4) in the front-rear direction and the center O of the impeller is perpendicular to a lower edge line MN of the lower flow dividing plate (311).
7. The dual intake range hood of claim 6, wherein: the perpendicular point K of the straight line OB and the lower edge line MN, the perpendicular point P of the straight line OP passing through the front point A of the air inlet (4) and the lower edge line MN, and the perpendicular point Q of the straight line CQ passing through the rear point C of the air inlet (4) and the lower edge line MN satisfy the following relation: d/2-30< PK < D/2+50, D/2-30< QK < D/2+80.
8. The double air intake range hood according to claim 2, wherein: the included angle theta between the straight line OA passing through the front point A of the air inlet (4) and the impeller circle center O and the straight line OC passing through the rear point C of the air inlet (4) and the impeller circle center O meets 15 DEG < theta <30 DEG, and the included angle beta between the straight line OA and the lower edge line MN meets 65 DEG < beta <90 deg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910311611.0A CN110107932B (en) | 2019-04-18 | 2019-04-18 | Double-air-inlet range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910311611.0A CN110107932B (en) | 2019-04-18 | 2019-04-18 | Double-air-inlet range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110107932A CN110107932A (en) | 2019-08-09 |
| CN110107932B true CN110107932B (en) | 2024-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910311611.0A Active CN110107932B (en) | 2019-04-18 | 2019-04-18 | Double-air-inlet range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110107932B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442312B (en) * | 2020-03-27 | 2022-05-17 | 宁波方太厨具有限公司 | Fume exhaust fan |
| CN114763917B (en) * | 2021-01-11 | 2023-06-20 | 宁波方太厨具有限公司 | Fume exhauster |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017049542A1 (en) * | 2015-09-24 | 2017-03-30 | 孙海潮 | Indoor unit of air conditioner |
| CN206959091U (en) * | 2017-07-20 | 2018-02-02 | 杭州老板电器股份有限公司 | Double air-inlet range hood and fume-exhausting systems |
| CN207378918U (en) * | 2017-11-07 | 2018-05-18 | 宁波方太厨具有限公司 | A kind of range hood |
| CN108592131A (en) * | 2018-07-26 | 2018-09-28 | 广东美的厨房电器制造有限公司 | Range hood |
| CN208139359U (en) * | 2018-03-01 | 2018-11-23 | 浙江安德电器有限公司 | Double-faced ventilated noise reduction range hood |
| CN210107510U (en) * | 2019-04-18 | 2020-02-21 | 宁波方太厨具有限公司 | Double air intake range hood |
-
2019
- 2019-04-18 CN CN201910311611.0A patent/CN110107932B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017049542A1 (en) * | 2015-09-24 | 2017-03-30 | 孙海潮 | Indoor unit of air conditioner |
| CN206959091U (en) * | 2017-07-20 | 2018-02-02 | 杭州老板电器股份有限公司 | Double air-inlet range hood and fume-exhausting systems |
| CN207378918U (en) * | 2017-11-07 | 2018-05-18 | 宁波方太厨具有限公司 | A kind of range hood |
| CN208139359U (en) * | 2018-03-01 | 2018-11-23 | 浙江安德电器有限公司 | Double-faced ventilated noise reduction range hood |
| CN108592131A (en) * | 2018-07-26 | 2018-09-28 | 广东美的厨房电器制造有限公司 | Range hood |
| CN210107510U (en) * | 2019-04-18 | 2020-02-21 | 宁波方太厨具有限公司 | Double air intake range hood |
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| Publication number | Publication date |
|---|---|
| CN110107932A (en) | 2019-08-09 |
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