CN106122103A - Air conditioner, cross-flow fan and volute structure thereof - Google Patents
Air conditioner, cross-flow fan and volute structure thereof Download PDFInfo
- Publication number
- CN106122103A CN106122103A CN201610718844.9A CN201610718844A CN106122103A CN 106122103 A CN106122103 A CN 106122103A CN 201610718844 A CN201610718844 A CN 201610718844A CN 106122103 A CN106122103 A CN 106122103A
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- China
- Prior art keywords
- worm frame
- hole
- air
- outlet
- cross flow
- 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.)
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- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000001717 pathogenic effect Effects 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an air conditioner, a cross-flow fan and a volute structure thereof, wherein the volute structure is provided with an outlet volute area which is used for being arranged corresponding to the air outlet side of a fan blade (2), the outlet volute area is provided with a sealing cavity (31) which is positioned between the inner side surface and the outer side surface of the outlet volute area, and the inner side surface of the outlet volute area is provided with a through hole (32) which is communicated with the sealing cavity (31) and the inner cavity of the volute. According to the volute structure provided by the invention, turbulent kinetic energy of airflow can pass through the through hole and be transmitted to the sealed cavity, so that the noise of the part is weakened or even eliminated, and the noise is effectively reduced; because the internal static pressure of the sealed cavity is slightly larger than the external static pressure, the outlet air flow cannot enter the sealed cavity and flows out from the air outlet of the volute structure under the guidance of the volute structure, and the outlet air quantity is ensured.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, particularly to a kind of air-conditioner, cross flow fan and worm frame thereof.
Background technology
Air channel noise common source is air-flow vortex in air-flow is in air channel to the impact of wall and fan blade rotary course
Produce and diffusion, the outlet volute region being especially correspondingly arranged in the air side with blower fan, after airflow passes crosses fan blade air-out, speed
Degree and turbulent flow, volution energy are relatively big, and therefore, the noise of generation is bigger.
At present, the noise eliminating this position usually uses the stream flow direction uniformly.As patent publication No. is
CN203642432U, in the patent document of invention entitled noise reduction cabinet-type air conditioner spiral case and cabinet air-conditioner, at the air-flow air outlet of spiral case
Arc deflector is set, deflector is provided with water conservancy diversion shrinkage pool.But, deflector needs to fix relative to spiral case, therefore, in order to
Fixing this deflector, need to arrange the entity structure (such as raised ribs) connecting this deflector, this entity structure is inevitably
Weaken air quantity and increase power consumption, it is impossible to ensureing air-out volume.
Therefore, how to reduce noise, it is ensured that air-out volume, be those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of worm frame, to reduce noise, it is ensured that air-out volume.The present invention also public affairs
A kind of cross flow fan and air-conditioner are opened.
For achieving the above object, the present invention provides following technical scheme:
From above-mentioned technical scheme it can be seen that a kind of worm frame of providing of the present invention, have for the going out of fan blade
The outlet volute region that wind side is correspondingly arranged, described outlet volute region has the sealing between on its inside and lateral surface
Cavity, the medial surface in described outlet volute region has the through hole connecting described sealing cavity with described spiral case inner chamber.
Preferably, in above-mentioned worm frame, also include being tightly connected plate, described in be tightly connected plate and described worm frame
Spiral case body connects the described sealing cavity of formation.
Preferably, in above-mentioned worm frame, described in be tightly connected plate and be positioned at the outside of described spiral case body.
Preferably, in above-mentioned worm frame, described in be tightly connected plate and described spiral case body spaced set.
Preferably, in above-mentioned worm frame, described through hole is perpendicular to the medial surface in described outlet volute region.
Preferably, in above-mentioned worm frame, the quantity of described through hole is multiple and in staggered arrangement.
Preferably, in above-mentioned worm frame, d1≤d2；
Wherein, d1 is the minimum range described in adjacent two rows between through hole；
D2 is the minimum range described in alternate two rows between through hole.
Preferably, in above-mentioned worm frame, described through hole has the extended structure extended to described sealing cavity inside.
Preferably, in above-mentioned worm frame, Φ≤h1≤2 Φ；
Wherein, Φ is the diameter of described through hole,
H1 is the length of described extended structure.
Preferably, in above-mentioned worm frame, the end of described through hole flushes with the surface of its place entity structure.
Present invention also offers a kind of cross flow fan, including worm frame and fan blade, described worm frame is such as above-mentioned
One described worm frame.
Preferably, in above-mentioned cross flow fan, β < α；
Wherein, α is the entrance angle of described fan blade；
β is the air outlet angle that described fan blade is correspondingly arranged with described outlet volute region.
Preferably, in above-mentioned cross flow fan, β=α-40 °.
Present invention also offers a kind of air-conditioner, including cross flow fan, described cross flow fan is through-flow wind as above
Machine.
The present invention provide worm frame, seal cavity between the medial surface and lateral surface in outlet volute region, and
Medial surface in outlet volute region arranges the through hole of communication seals cavity and spiral case inner chamber so that outlet volute region defines
Helmholtz's acoustic wave filter structure.Air-flow is after doing work through fan blade, and maximum vortex street occurs in the air side of fan blade, and along with air-flow
Flowing progressively spread, diffusion process can produce turbulent flow in various degree, when air-flow flow to outlet volute region, air-flow
Turbulent Kinetic can be delivered to seal in cavity through through hole, produces resonance and Absorption, make Turbulent Kinetic in sealing cavity
Reduce, and then weakening even eliminates this partial noise, effectively reduces noise；Further, unnecessary entity structure is not had to hinder gas
Stream flowing, sealing cavity is the space sealed, and in it, the moment exists still current of gas, and air-out air-flow is when by through hole, due to close
The inside static pressure of envelope cavity is micro-more than outside, uses pathogenic wind stream and cannot be introduced into sealing cavity, and in the structure guiding of worm frame
Under, the air outlet of worm frame flow out, it is ensured that air-out volume.
Present invention also offers a kind of cross flow fan with above-mentioned worm frame and air-conditioner.Due to above-mentioned worm frame
Having above-mentioned technique effect, cross flow fan and the air-conditioner with above-mentioned worm frame also should have same technique effect,
This is no longer discussed in detail.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
The structural representation of the cross flow fan that Fig. 1 provides for the embodiment of the present invention；
The partial schematic diagram of the worm frame that Fig. 2 provides for the embodiment of the present invention；
Fig. 3 is the left view schematic diagram of Fig. 2；
The distribution schematic diagram of the through hole that Fig. 4 provides for the embodiment of the present invention；
The structural representation of the through hole that Fig. 5 provides for the embodiment of the present invention.
Detailed description of the invention
The invention discloses a kind of worm frame, to reduce noise, it is ensured that air-out volume.The invention also discloses one to pass through
Flow fan and air-conditioner.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Such as Fig. 1, embodiments providing a kind of worm frame, have that the air side with fan blade 2 is correspondingly arranged goes out
Mouth spiral case region, outlet volute region has the sealing cavity 31 between on its inside and lateral surface, outlet volute region
Medial surface there is through hole 32, through hole 32 communication seals cavity 31 and spiral case inner chamber.
The worm frame that the embodiment of the present invention provides, seals cavity 31 and is positioned at medial surface and the lateral surface in outlet volute region
Between, and the medial surface in outlet volute region arranges the through hole 32 of communication seals cavity 31 and spiral case inner chamber so that outlet snail
Shell region defines Helmholtz's acoustic wave filter structure.Air-flow is after doing work through fan blade 2, and maximum vortex street occurs in going out of fan blade 2
Wind side, and along with the flowing of air-flow is progressively spread, diffusion process can produce turbulent flow in various degree, when air-flow flow to export snail
During shell region, the Turbulent Kinetic of air-flow can be delivered to seal in cavity 31 through through hole 32, produces resonance in sealing cavity 31
And Absorption, make Turbulent Kinetic reduce, and then weakening even eliminates this partial noise, effectively reduces noise；Further, do not have
Unnecessary entity structure hinders air current flow, and sealing cavity 31 is the space sealed, and in it, the moment exists still current of gas, goes out pathogenic wind
Stream is when by through hole 32, micro-more than outside owing to sealing the inside static pressure of cavity 31, uses pathogenic wind stream and cannot be introduced into sealing sky
Chamber 31, and under the structure of worm frame guides, the air outlet 33 of worm frame flow out, it is ensured that air-out volume.
Preferably, fan blade 2 is through-flow fan blade.
It is understood that worm frame away from the part (near the part of heat exchanger 1) of air outlet 33 structure without
Change, only outlet volute region is changed.The medial surface in outlet volute region is that this region is towards the one of fan blade 2
Face, the lateral surface in outlet volute region is the one side of its fan blade 2 dorsad.
As in figure 2 it is shown, in the worm frame of embodiment of the present invention offer, also include being tightly connected plate 34, be tightly connected plate
34 are connected formation with the spiral case body of worm frame seals cavity 31.That is, it is tightly connected plate 34 by increase so that be tightly connected
Plate 34 is connected with the spiral case body of worm frame, forms therebetween the sealing cavity 31 corresponding to outlet volute region.
Maintain original structure in order to ensure air channel, worm frame inside, be tightly connected plate 34 and be positioned at the outside of spiral case body.Its
In, it being tightly connected the lateral surface that one side is outlet volute region of plate 34 spiral case body dorsad, spiral case body is tightly connected dorsad
The one side of plate 34 is the medial surface in outlet volute region.
It is of course also possible to plate 34 will be tightly connected be positioned at the inner side of spiral case body.
Preferably, plate 34 and spiral case body spaced set it are tightly connected.That is, plate 34 it is tightly connected corresponding with spiral case body
Same or like in the curvature of the entity worm frame in outlet volute region, make the distance phase being tightly connected plate 34 to spiral case body
Deng so that the thickness sealing cavity 31 is uniform.Seal the medial surface that thickness direction is outlet volute region of cavity 31 to outlet
The direction of the lateral surface in spiral case region.
For being easy to processing and improving the consideration of erasure effect, through hole 32 is preferably made to be perpendicular to the inner side in outlet volute region
Face.Can also make through hole 32 and the medial surface in outlet volute region is that certain angle of inclination is arranged, at this most tired state and
All within protection domain.
As it is shown on figure 3, the quantity of through hole 32 is multiple and in staggered arrangement.By above-mentioned setting, improve further
Sound-deadening and noise-reducing effect.
As shown in Figure 4, d1≤d2；Wherein, d1 is the minimum range between adjacent two exhausting holes 32；D2 is that alternate two rows are led to
Minimum range between hole 32.By above-mentioned setting, it is ensured that through hole 32 is at the uniform distribution of forces in outlet volute region.At this
In embodiment, it is a row with the through hole 32 arranged in the horizontal direction, it is also possible to the through hole 32 arranged according to vertical direction is a row,
Can also be a row by the through hole 32 along inclined direction arranged, tire out the most one by one at this and state.Alternate two exhausting holes 32 are that two rows are led to
The structure of an exhausting hole 32 it is spaced between hole 32.
As it is shown in figure 5, through hole 32 has to sealing the internal extended structure 321 extended of cavity 31.By arranging extension knot
Structure 321 so that cavity 31 is internal to be extended through hole 32 to sealing, and directly affects resonant frequency and the size of Young's modulus value.Its
In, the length of extended structure 321 is the longest, and resonant frequency is the lowest.The thickness of extended structure 321 is the thickest, the Young of extended structure 321
Modulus is the biggest, and the resonant frequency of Helmholtz's acoustic filter more levels off to the situation that extended structure 321 is rigidity.That is, by arranging
Extended structure 321, reaches the effect of rectifying noise-reduction.
Preferably, Φ≤h1≤2 Φ；Wherein, Φ is the diameter of through hole 32, and h1 is the length of extended structure 321.Certainly,
It can also be provided that other ratios, tire out the most one by one at this and state.Wherein, h2 is the length of through hole 32, h1 ＜ h2.
The end of through hole 32 flushes with the surface of its place entity structure.That is, being not provided with extended structure 321, through hole 32 passes through
Wearing the surface of the entity structure at its place, the both ends of through hole 32 lay respectively at the surface of entity structure, and then make through hole 32
End flush with the surface of its place entity structure.
The embodiment of the present invention additionally provides a kind of cross flow fan, and including worm frame 1 and fan blade 2, worm frame 1 is as above
State any one worm frame.Owing to above-mentioned worm frame has above-mentioned technique effect, there is the cross flow fan of above-mentioned worm frame
Also should have same technique effect, tire out the most one by one at this and state.
As it is shown in figure 1, β < α；Wherein, α is the entrance angle of fan blade 2；β is that fan blade 2 is correspondingly arranged with outlet volute region
Air outlet angle.By above-mentioned setting, further increase noise reduction.
Further, β=α-40 °.
The embodiment of the present invention additionally provides a kind of air-conditioner, including cross flow fan as above.Due to above-mentioned through-flow wind
Facility have above-mentioned technique effect, and the air-conditioner with above-mentioned cross flow fan also should have same technique effect, the most another at this
One tired states.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (14)
1. a worm frame, has the outlet volute region for being correspondingly arranged with the air side of fan blade (2), and its feature exists
In, described outlet volute region has the sealing cavity (31) between on its inside and lateral surface, described outlet volute district
The medial surface in territory has the through hole (32) connecting described sealing cavity (31) with described spiral case inner chamber.
2. worm frame as claimed in claim 1, it is characterised in that also include being tightly connected plate (34), described in be tightly connected
Plate (34) is connected the described sealing cavity (31) of formation with the spiral case body of described worm frame.
3. worm frame as claimed in claim 2, it is characterised in that described in be tightly connected plate (34) and be positioned at described spiral case body
Outside.
4. as claimed in claim 2 or claim 3 worm frame, it is characterised in that described in be tightly connected plate (34) and described spiral case this
Body spaced set.
5. worm frame as claimed in claim 1, it is characterised in that described through hole (32) is perpendicular to described outlet volute region
Medial surface.
6. worm frame as claimed in claim 1, it is characterised in that the quantity of described through hole (32) is multiple and in alternate matrix
Row arrangement.
7. worm frame as claimed in claim 6, it is characterised in that d1≤d2；
Wherein, d1 is the minimum range described in adjacent two rows between through hole (32)；
D2 is the minimum range described in alternate two rows between through hole (32).
8. worm frame as claimed in claim 1, it is characterised in that described through hole (32) has to described sealing cavity (31)
The internal extended structure (321) extended.
9. worm frame as claimed in claim 8, it is characterised in that Φ≤h1≤2 Φ；
Wherein, Φ is the diameter of described through hole (32),
H1 is the length of described extended structure (321).
10. worm frame as claimed in claim 1, it is characterised in that the end of described through hole (32) and its place entity knot
The surface of structure flushes.
11. 1 kinds of cross flow fans, including worm frame (1) and fan blade (2), it is characterised in that described worm frame (1) is such as power
Profit requires the worm frame described in any one of 1-10.
12. cross flow fans as claimed in claim 11, it is characterised in that β < α；
Wherein, α is the entrance angle of described fan blade (2)；
β is the air outlet angle that described fan blade (2) is correspondingly arranged with described outlet volute region.
13. cross flow fans as claimed in claim 12, it is characterised in that β=α-40 °.
14. 1 kinds of air-conditioners, including cross flow fan, it is characterised in that described cross flow fan is such as any one of claim 11-13
Described cross flow fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610718844.9A CN106122103A (en) | 2016-08-24 | 2016-08-24 | Air conditioner, cross-flow fan and volute structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610718844.9A CN106122103A (en) | 2016-08-24 | 2016-08-24 | Air conditioner, cross-flow fan and volute structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106122103A true CN106122103A (en) | 2016-11-16 |
Family
ID=57275254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610718844.9A Pending CN106122103A (en) | 2016-08-24 | 2016-08-24 | Air conditioner, cross-flow fan and volute structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106122103A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720362A (en) * | 2020-06-01 | 2020-09-29 | 广东美的厨房电器制造有限公司 | Fan assembly and heating furnace |
| CN112648724A (en) * | 2020-12-28 | 2021-04-13 | 江苏科技大学 | Condensate water recovery device of wall-mounted air conditioner indoor unit |
| WO2023245797A1 (en) * | 2022-06-22 | 2023-12-28 | Tcl王牌电器(惠州)有限公司 | Air passage structure and air purifier |
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| JPH11287471A (en) * | 1998-03-31 | 1999-10-19 | Denso Corp | Air conditioner |
| CN101046340A (en) * | 2006-03-28 | 2007-10-03 | 海尔集团公司 | Continuous arc evaporator of wall hung air conditioner indoor unit |
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN203642431U (en) * | 2013-12-17 | 2014-06-11 | 海尔集团公司 | Cabinet volute and cabinet air conditioner |
| CN203703931U (en) * | 2013-12-24 | 2014-07-09 | 华电重工股份有限公司 | Single-faced perforated sound absorber used for interior of heat recovery boiler |
| CN205191681U (en) * | 2015-11-02 | 2016-04-27 | 广东万和电气有限公司 | Range hood |
| CN205977814U (en) * | 2016-08-24 | 2017-02-22 | 珠海格力电器股份有限公司 | Air conditioner, cross-flow fan and volute structure thereof |
-
2016
- 2016-08-24 CN CN201610718844.9A patent/CN106122103A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11287471A (en) * | 1998-03-31 | 1999-10-19 | Denso Corp | Air conditioner |
| CN101046340A (en) * | 2006-03-28 | 2007-10-03 | 海尔集团公司 | Continuous arc evaporator of wall hung air conditioner indoor unit |
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN203642431U (en) * | 2013-12-17 | 2014-06-11 | 海尔集团公司 | Cabinet volute and cabinet air conditioner |
| CN203703931U (en) * | 2013-12-24 | 2014-07-09 | 华电重工股份有限公司 | Single-faced perforated sound absorber used for interior of heat recovery boiler |
| CN205191681U (en) * | 2015-11-02 | 2016-04-27 | 广东万和电气有限公司 | Range hood |
| CN205977814U (en) * | 2016-08-24 | 2017-02-22 | 珠海格力电器股份有限公司 | Air conditioner, cross-flow fan and volute structure thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720362A (en) * | 2020-06-01 | 2020-09-29 | 广东美的厨房电器制造有限公司 | Fan assembly and heating furnace |
| CN112648724A (en) * | 2020-12-28 | 2021-04-13 | 江苏科技大学 | Condensate water recovery device of wall-mounted air conditioner indoor unit |
| WO2023245797A1 (en) * | 2022-06-22 | 2023-12-28 | Tcl王牌电器(惠州)有限公司 | Air passage structure and air purifier |
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Application publication date: 20161116 |