CN109595651B - Air outlet cover structure and range hood applying same - Google Patents
Air outlet cover structure and range hood applying same Download PDFInfo
- Publication number
- CN109595651B CN109595651B CN201710924550.6A CN201710924550A CN109595651B CN 109595651 B CN109595651 B CN 109595651B CN 201710924550 A CN201710924550 A CN 201710924550A CN 109595651 B CN109595651 B CN 109595651B
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- guide plate
- air outlet
- cover body
- volute
- fan
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- 238000009792 diffusion process Methods 0.000 claims abstract description 34
- 238000005192 partition Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000010411 cooking Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing 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
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)
Abstract
The invention discloses an air outlet cover structure, which comprises a cover body in a hollow cylinder shape, wherein the cover body is provided with a first end and a second end which are opposite and are open, the caliber of the first end is larger than that of the second end, a first guide plate and a second guide plate are arranged in the cover body, each guide plate extends from the first end to the second end of the cover body, a first diffusion flow passage is formed between the first guide plate and the inner side wall of the cover body, a second diffusion flow passage is formed between the second guide plate and the inner side wall of the cover body, and the cross sections of the first diffusion flow passage and the second diffusion flow passage are gradually reduced from the first end to the second end of the cover body respectively. Also discloses a range hood with the air outlet cover structure. The flow guiding function of the air outlet cover is beneficial to the formation of laminar flow of the air outlet, the defect that the air flow directly enters the external pipeline in a turbulent state after exiting from the volute is avoided, and the strong friction and impact during the mixing of the air outlet air flows of the two three-way fans are also avoided, so that the flow loss is greatly reduced, and the efficiency is improved.
Description
Technical Field
The invention relates to kitchen appliances, in particular to a fan device and an air outlet cover structure thereof.
Background
The range hood has become one of the indispensable kitchen appliances in modern families. The conventional range hood comprises a top suction type range hood and a near suction type range hood, wherein the top suction type range hood utilizes the principle of rising hot air to suck and discharge the naturally rising oil smoke generated during cooking, and the range hood has wider and wider application due to the advantages of neatness, light weight, small occupied space and the like, but the suction effect of a power source is reduced due to the fact that the power source is far away from a cooking bench, and the oil smoke cannot be completely sucked; the near-suction type range hood utilizes vortex wind pressure to keep away, absorbs most of oil smoke which is closer to the cooking bench in an arc form, can reduce adverse effects on human health, and the power source is closer to the cooking bench, so that the suction effect of the power source is basically not reduced, but the oil smoke cannot be caused by few upward escaping oil smoke due to higher rising speed of the oil smoke.
An existing range hood, such as a range hood disclosed in China patent application number 201420665919.8, comprises a shell, a fume collecting hood, a centrifugal fan, a panel, an oil net, a guide plate and an oil receiving groove, wherein the fume collecting hood is arranged at the top of the shell, the centrifugal fan is arranged in the fume collecting hood, and an air inlet of the centrifugal fan faces forward. The single-volute fan is used for the range hood with inconsistent air suction, unstable operation and lower operation efficiency.
For this reason, there is the parallelly connected structure of two fans, this kind of fan structure has two fans that can independently operate, can obtain bigger stronger wind-force, a two spiral case fans of chinese patent publication such as application number 201720109507.X, including the casing, be provided with two fans in the casing, and two fans share an air outlet, the air outlet has a cylindricality passageway, be provided with movable deep bead at the middle part of cylindricality passageway, the deep bead extends to the air outlet along the length direction of cylindricality passageway, separate the cylindricality passageway into two solitary air-out passageways, every air-out passageway all is linked together with a fan, and rotate the deep bead and can selectively close one of them air-out passageway, open another air-out passageway simultaneously.
The parallel connection mode of the fan is characterized in that the flow loss of the impeller is generated by molecular collision and shearing friction caused by inconsistent pressure, flow speed and flow direction in the fluid, and the partial loss occupies a large proportion in the mechanical loss of the fan, so that after the gas enters a volute, the gas is driven by the impeller to make spiral movement from the center to the edge, the direction is continuously changed, the pressure and the speed are continuously improved from inside to outside, finally the gas leaves the impeller from the tangential direction of the edge of the impeller to enter an outlet, the pressure is continuously improved under the action of centrifugal force due to the continuous increase of the sectional area of a scroll flow channel, the linear speed is continuously improved under the pushing of the impeller blade, the difference of the flow speed and the pressure is also more and more increased in the same radial section of the scroll flow channel, and the gas with different flow speed and pressure are mutually mixed in a diffusion pipe to generate strong friction and impact, and enter laminar flow in the form of intense turbulence and vortex flow, and a great part of the speed kinetic energy and pressure potential energy of the gas are converted into heat to be lost in the process, so that an important part of the flow loss is formed; in addition, the commonly used fans are multi-wing centrifugal fans, and after parallel connection, the air suction is inconsistent, the operation is unstable, and the operation efficiency is lower.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide an air outlet cover structure for reducing flow loss and improving efficiency, aiming at the problems existing in the prior art.
The second technical problem to be solved by the invention is to provide the range hood with the air outlet cover structure.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides an air-out cover structure, is including being the hollow tube-shape cover body, the cover body has relative, open-ended first end and second end, the bore of first end is greater than the bore of second end, its characterized in that: the novel diffuser is characterized in that a first guide plate and a second guide plate are arranged in the cover body, each guide plate extends from the first end to the second end of the cover body, a first diffusion flow passage is formed between the first guide plate and the inner side wall of the cover body, a second diffusion flow passage is formed between the second guide plate and the inner side wall of the cover body, and the sectional areas of the first diffusion flow passage and the second diffusion flow passage are gradually reduced from the first end to the second end of the cover body respectively.
Preferably, the diffuser forms a diffuser passage, and the first baffle is inclined from a first end to a second end gradually towards the second baffle, and the second baffle is inclined from the first end to the second end gradually towards the first baffle, and the two baffles are connected at a position close to the second end.
In order to ensure that the air flow is stably transited, the joint of the two guide plates is smoothly transited.
In order to avoid the mixing and collision of the air flows with different speeds and pressures, two opposite side edges of the first guide plate are connected with the inner side wall of the cover body, and two opposite side edges of the second guide plate are connected with the inner side wall of the cover body, so that the first diffusion flow passage and the second diffusion flow passage are independent from each other.
In order to reduce outlet noise, sound absorption holes are densely distributed on the first guide plate and/or the second guide plate.
In order to further reduce noise, a partition plate is provided in a space between the first and second baffle plates, thereby dividing the space between the first and second baffle plates into at least two resonance chambers.
The invention solves the second technical problem by adopting the technical proposal that: the range hood with the air outlet cover structure comprises a fan system, wherein the fan system is of a double-fan parallel structure, and the air outlet cover structure is arranged at an air outlet of the fan system.
For increasing flow efficiency, improve the amount of wind, fan system includes first ternary fan and second ternary fan, first ternary fan includes first spiral case and sets up the first ternary impeller in first spiral case, the second ternary fan includes second spiral case and sets up the second ternary impeller in the second spiral case, first spiral case and second spiral case interval, arrange side by side, the top of first spiral case forms first air outlet, the top of second spiral case is formed with the second air intake, the cover body of air-out cover structure covers first air outlet and second air outlet to all communicate respectively.
In order to avoid air flow mixing, the first diffusion flow passage corresponds to a first air outlet of the first ternary fan at the first end of the cover body, and the second diffusion flow passage corresponds to a second air outlet of the second ternary fan at the first end of the cover body.
For saving space, the energy saving improves the synchronism of two impellers, be formed with first air intake on the first spiral case, be formed with the second air intake on the second spiral case, first air intake and second air intake keep away from each other, be provided with driving motor between first spiral case and the second spiral case, driving motor has the dual output shaft that is used for driving first ternary impeller and second ternary impeller respectively.
Compared with the prior art, the invention has the advantages that: two diffusion flow passages corresponding to the outlets of the double fans are formed in the cover body of the air outlet cover, the air at the corresponding outlets is guided, laminar flow is formed by the air at the outlets, the laminar flow enters the external pipeline, the defect that the air flow directly enters the external pipeline in a turbulent state after exiting from the volute is avoided, and the strong friction and impact during mixing of the air flows at the air outlets of the two ternary fans are also avoided, so that the flow loss is greatly reduced, and the efficiency is improved.
Drawings
Fig. 1 is a schematic view of a range hood according to the present invention;
fig. 2 is a schematic view of a front cover of a hidden chassis of the range hood according to the present invention;
fig. 3 is a cross-sectional view of a fan system and an air outlet cover of the range hood of the present invention;
fig. 4 is a schematic view of an air outlet cover according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Referring to fig. 1 to 4, a range hood includes a hood 1, a cabinet 2 above the hood 1, and for convenience of description, hereinafter, the terms "front", "rear", "left", "right", "up", "down" refer to the direction of a user relative to the range hood when the range hood is in use, and are not limited in structure.
In the present embodiment, the cabinet 2 includes a front cover 21, side plates 22 located on the left and right sides, respectively, and a rear cover 23. A fan system 3 is arranged in the case 2, and the fan system 3 can adopt a double-fan parallel structure as described in the background art. In this embodiment, the fan system 3 preferably includes two independently operable first and second three-way fans 31 and 32, which are disposed in parallel. By using the ternary impeller, compared with a centrifugal fan, the flow efficiency can be greatly increased, and the air quantity can be improved.
The first tertiary fan 31 includes a first scroll 311 and a first tertiary impeller 312 disposed within the first scroll 311, and the second tertiary fan 32 includes a second scroll 321 and a second tertiary impeller 322 disposed within the second scroll 321. The first volute 311 and the second volute 321 are arranged side by side at intervals, a first air inlet 313 is formed in the first volute 311, a second air inlet 323 is formed in the second volute 321, the air inlets of the two volutes are far away from each other, namely, the air inlet 313 of the first volute 311 is formed at one side far away from the second volute 321, the two volutes are arranged back to back, so that the two three-way fans are arranged side by side left and right, and the first air inlet 313 faces the left side of the case 2, and the second air inlet 323 faces the right side of the case 2. The top end of the first volute 311 forms a first air outlet 314, the top end of the second volute 321 forms a second air outlet 324, and the first air outlet 314 and the second air outlet 324 are arranged side by side at intervals.
First tertiary impeller 312 and second tertiary impeller 322 may employ prior art techniques, such as those disclosed in applicant's application number 201620102790.9. The first and second three-way impellers 312 and 322 share the same driving motor 33, the driving motor 33 is disposed between the first and second volutes 311 and 321, and the driving motor 33 has a double output shaft, whereby the output shaft 331 extending leftward may be connected to the first three-way impeller 312 to drive the first three-way impeller 312 to operate, and the output shaft 331 extending rightward may be connected to the second three-way impeller 322 to drive the second three-way impeller 322 to operate. Therefore, the two ternary fans have good synchronism, and meanwhile, energy sources can be saved.
The two ternary fans can adopt the same structure, and the arrangement mode can greatly improve the air quantity on the premise of not obviously increasing the volume of the case 2.
An air outlet cover structure 4 is arranged above the fan system 3, and a cover body 41 of the air outlet cover structure 4 covers a first air outlet 314 of a first volute 311 of the first ternary fan 31 and a second air outlet 324 of a second volute 321 of the second ternary fan 32 and are communicated. In this embodiment, the air outlet cover structure 4 includes a cover 41 and a deflector disposed in the cover 41. The cover 41 is hollow and cylindrical, and the first end 411 (lower end) and the second end 412 (upper end) opposite to each other are open, the caliber of the first end 411 is larger than that of the second end 412, that is, the opening gradually decreases from a position close to the fan system 3 to a position far from the fan system 3, and the fume flow enters the cover 41 from the first end 411 and leaves the cover 41 from the second end 412 to enter an external pipeline connected with the air outlet cover structure 4.
The baffle includes a first baffle 421 and a second baffle 422, the first baffle 421 extends from the first end 411 to the second end 412 of the cover 41, and the first baffle 421 corresponds to a first edge 315 (a right edge of the first air outlet) of the second air outlet 324 of the first ternary fan 31 near the second ternary fan 32 at the first air outlet 314 of the first ternary fan 31, and the second baffle 422 corresponds to a second edge 325 (a left edge of the second air outlet) of the second air outlet 324 of the second ternary fan 32 near the first air outlet 324 of the first ternary fan 31 at the first end 411 of the cover 41. Each baffle has a width extending in the front-to-rear direction. The first baffle 421 is gradually inclined toward the second baffle 422 (rightward) from the first end 411 to the second end 412, and the second baffle 422 is gradually inclined toward the first baffle 421 (leftward) from the first end 411 to the second end 412, i.e., each baffle extends from a position offset from the middle of the bottom of the housing 41 toward a position in the middle of the top of the housing 41. The top ends of the first and second deflectors 421 and 422 (near the second end 412 of the housing 41) are connected to each other, and preferably, the connection between the two deflectors is smoothly transitioned, so as to guide the air flow to smoothly transition.
The front and rear side edges 4211, 4212 of the first deflector 421 are always connected to the inner side wall of the cover 41, and the front and rear side edges 4221, 4222 of the second deflector 422 are always connected to the inner side wall of the cover 41. The inside of the housing 41 is divided into a first diffusion flow passage 431 between the inner side wall of the housing 41 and the first flow guide plate 421, and a second diffusion flow passage 432 between the inner side wall of the housing 41 and the second flow guide plate 422, wherein the first diffusion flow passage 431 and the second diffusion flow passage 432 are independent from each other. The first diffusion flow passage 431 corresponds to the first air outlet 314 of the first tertiary fan 31 at the first end 411 of the housing 41, i.e., completely covers the first air outlet 314, and the second diffusion flow passage 432 corresponds to the second air outlet 324 of the second tertiary fan 32 at the first end 411 of the housing 41, i.e., completely covers the second air outlet 324. The cross-sectional area of the first diffusion flow channel 431 is gradually reduced from the first end 411 to the second end 412, and the cross-sectional area of the second diffusion flow channel 432 is gradually reduced from the first end 411 to the second end 412, so that the outlet speed at the top of the first diffusion flow channel 431 is greater than the outlet speed at the bottom of the first diffusion flow channel 431, and the outlet speed at the top of the second diffusion flow channel 432 is greater than the outlet speed at the bottom of the second diffusion flow channel 432.
By providing the above-described baffle, the air flow speeds of the first diffuser flow passage 431 communicating with the first air outlet 314 of the first three-way fan 31 and the second diffuser flow passage 42 communicating with the second air outlet 324 of the second three-way fan 32 are made close to each other. The diversion effect of the air outlet cover structure 4 is beneficial to the formation of laminar flow of the outlet air, and the air enters the external pipeline after forming the laminar flow, so that the defect that the air flow directly enters the external pipeline in a turbulent state after exiting from the volute is avoided, and the strong friction and impact during the mixing of the air flows at the air outlets of the two three-way fans are also avoided, thereby greatly reducing the flow loss and improving the efficiency.
The sound absorbing holes 44 are densely distributed on the first baffle 421 and/or the second baffle 422, which is beneficial to reducing outlet noise. To further reduce noise, a partition 45 may be further provided in the space between the first and second flow plates 421 and 422 such that the space between the first and second flow plates 421 and 422 is partitioned into at least two resonant cavities 451. Alternatively, sound absorbing cotton may be provided in a space between the first and second flow guide plates 421 and 422. Alternatively, the baffle 45 may be replaced with a reinforcing rib to enhance the strength of the baffle.
Claims (9)
1. The utility model provides an air-out cover structure, is including being hollow tube-shape cover body (41), cover body (41) have relative, open-ended first end (411) and second end (412), the bore of first end (411) is greater than the bore of second end (412), its characterized in that: a first flow guide plate (421) and a second flow guide plate (422) are arranged in the cover body (41), each flow guide plate extends from a first end (411) to a second end (412) of the cover body (41), a first diffusion flow channel (431) is formed between the first flow guide plate (421) and the inner side wall of the cover body (41), a second diffusion flow channel (432) is formed between the second flow guide plate (422) and the inner side wall of the cover body (41), and the cross sections of the first diffusion flow channel (431) and the second diffusion flow channel (432) are gradually reduced from the first end (411) to the second end (412) of the cover body (41) respectively;
the first guide plate (421) is gradually inclined towards the second guide plate (422) from the first end (411) to the second end (412), the second guide plate (422) is gradually inclined towards the first guide plate (421) from the first end (411) to the second end (412), and the two guide plates are connected at a position close to the second end (412).
2. The outlet hood structure according to claim 1, wherein: the joint of the two guide plates is in smooth transition.
3. The outlet hood structure according to claim 1, wherein: two opposite sides of the first flow guide plate (421) are connected with the inner side wall of the cover body (41), and two opposite sides of the second flow guide plate (422) are connected with the inner side wall of the cover body (41), so that the first diffusion flow channel (431) and the second diffusion flow channel (432) are independent from each other.
4. A hood structure according to any one of claims 1 to 3, wherein: the first guide plate (421) and/or the second guide plate (422) are densely provided with sound absorption holes (44).
5. The outlet hood structure according to claim 4, wherein: a partition plate (45) is arranged in the space between the first guide plate (421) and the second guide plate (422), so that the space between the first guide plate (421) and the second guide plate (422) is divided into at least two resonant cavities (451).
6. A range hood with the air outlet cover structure as claimed in any one of claims 1 to 5, comprising a fan system (3), wherein the fan system (3) is of a double-fan parallel structure, and the air outlet cover structure is arranged at an air outlet of the fan system (3).
7. The range hood of claim 6, wherein: the fan system (3) comprises a first ternary fan (31) and a second ternary fan (32), the first ternary fan (31) comprises a first volute (311) and a first ternary impeller (312) arranged in the first volute (311), the second ternary fan (32) comprises a second volute (321) and a second ternary impeller (322) arranged in the second volute (321), the first volute (311) and the second volute (321) are arranged at intervals and side by side, a first air outlet (314) is formed at the top end of the first volute (311), a second air outlet (324) is formed at the top end of the second volute (321), and a cover body (41) of the air outlet cover structure (4) covers the first air outlet (314) and the second air outlet (324) and is communicated equally.
8. The range hood of claim 7, wherein: the first diffusion flow passage (431) corresponds to the first air outlet (314) of the first ternary fan (31) at the first end (411) of the cover body (41), and the second diffusion flow passage (432) corresponds to the second air outlet (324) of the second ternary fan (32) at the first end (411) of the cover body (41).
9. The range hood of claim 7, wherein: the novel three-dimensional centrifugal compressor is characterized in that a first air inlet (313) is formed in the first volute (311), a second air inlet (323) is formed in the second volute (321), the first air inlet (313) and the second air inlet (323) are far away from each other, a driving motor (33) is arranged between the first volute (311) and the second volute (321), and the driving motor (33) is provided with a double output shaft for driving the first three-dimensional impeller (312) and the second three-dimensional impeller (322) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710924550.6A CN109595651B (en) | 2017-09-30 | 2017-09-30 | Air outlet cover structure and range hood applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710924550.6A CN109595651B (en) | 2017-09-30 | 2017-09-30 | Air outlet cover structure and range hood applying same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109595651A CN109595651A (en) | 2019-04-09 |
| CN109595651B true CN109595651B (en) | 2024-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710924550.6A Active CN109595651B (en) | 2017-09-30 | 2017-09-30 | Air outlet cover structure and range hood applying same |
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| Country | Link |
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| CN (1) | CN109595651B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242996B (en) * | 2019-06-27 | 2024-03-29 | 浙江蓝炬星电器有限公司 | Mounting device and method for integrated kitchen air outlet cover |
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| CN203052780U (en) * | 2012-12-27 | 2013-07-10 | 谈启明 | Range hood |
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| CN106812724A (en) * | 2016-12-12 | 2017-06-09 | 杭州老板电器股份有限公司 | A kind of novel fan system of double streamline air intake |
| CN107191983A (en) * | 2017-01-12 | 2017-09-22 | 宁波方太厨具有限公司 | A kind of range hood |
| CN207214194U (en) * | 2017-09-30 | 2018-04-10 | 宁波方太厨具有限公司 | A kind of range hood of air-out cover structure and application the air-out cover structure |
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2017
- 2017-09-30 CN CN201710924550.6A patent/CN109595651B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201476127U (en) * | 2009-08-12 | 2010-05-19 | 李怡中 | Dual-motor and dual-windwheel quick-detachable oil-smoke separator |
| EP2535647A1 (en) * | 2011-06-16 | 2012-12-19 | Miele & Cie. KG | Vapour extractor for an oven or a hotplate |
| CN203052780U (en) * | 2012-12-27 | 2013-07-10 | 谈启明 | Range hood |
| CN204421125U (en) * | 2014-12-31 | 2015-06-24 | 朱启奎 | A kind of low-noise energy-saving integrated kitchen range |
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| CN109595651A (en) | 2019-04-09 |
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