CN108457903A - Noise reduction volute, backward tilting type centrifugal fan and air conditioner - Google Patents
Noise reduction volute, backward tilting type centrifugal fan and air conditioner Download PDFInfo
- Publication number
- CN108457903A CN108457903A CN201810095275.6A CN201810095275A CN108457903A CN 108457903 A CN108457903 A CN 108457903A CN 201810095275 A CN201810095275 A CN 201810095275A CN 108457903 A CN108457903 A CN 108457903A
- Authority
- CN
- China
- Prior art keywords
- centrifugation blade
- inner chambers
- noise reducing
- reducing casing
- groove
- 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.)
- Granted
Links
- 238000005119 centrifugation Methods 0.000 claims description 76
- 230000007704 transition Effects 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 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
- F04D29/40—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
- F04D29/424—Double entry casings
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a noise reduction volute, a backward tilting centrifugal fan and an air conditioner. The noise reduction volute comprises an inner side cavity (1) for mounting a centrifugal fan blade (2), and noise reduction grooves communicated with the inner side cavity (1) are formed in the side wall of the inner side cavity (1). According to the noise reduction volute provided by the invention, the noise of the backward inclined centrifugal fan blade can be reduced, and the use experience of a user is improved.
Description
Technical field
The invention belongs to air-conditioning technique fields, and in particular to a kind of noise reducing casing, backward tilt centrifugal blower and air-conditioning
Device.
Background technology
Present market is higher and higher to the efficiency requirement of window machine, and in order to preferably promote fan efficiency, many producers start
It attempts to use backward tilt centrifugation blade；Backward tilt centrifugation blade is efficient, but noise is also high simultaneously, therefore user is caused to use
When experience reduce.
Invention content
Therefore, the technical problem to be solved in the present invention is to provide a kind of noise reducing casing, backward tilt centrifugal blower and air-conditioning
Device can reduce the noise of backward tilt centrifugation blade, improve the usage experience of user.
To solve the above-mentioned problems, the present invention provides a kind of noise reducing casing, includes empty for installing the inside of centrifugation blade
Chamber is provided with the noise reduction groove being connected to inner chambers on the side side wall of inner chambers.
Preferably, noise reduction groove includes the forward recess being arranged on the side wall of inner chambers being located on front side of centrifugation blade；
And/or noise reduction groove includes the side groove on the side wall of centrifugation blade side being arranged in inner chambers.
Preferably, noise reducing casing includes volute tongue, and side groove is arranged in volute tongue.
Preferably, volute tongue is parallel with the pivot center of centrifugation blade towards the side of centrifugation blade.
Preferably, inner chambers are H4, axial direction of the forward recess along centrifugation blade along the width of the axial direction of centrifugation blade
Direction is H3, wherein H4/20≤H3≤3H4/10 away from the depth of the direction recess of inner chambers.
Preferably, preceding in the central rotating shaft for being parallel to centrifugation blade and in the plane of the front face of inner chambers
Groove is symmetrical about the central axis of centrifugation blade.
Preferably, forward recess is L3, forward recess along the opening width in the central axial direction of centrifugation blade
Be L4, wherein L4 ＜ L3 along the bottom width in the central axial direction of centrifugation blade, and forward recess is from opening
Edge between bottom margin be arc transition.
Preferably, side groove includes U-type groove, and the width of U-type groove is H1, the rear side of the side wall of U-type groove apart from inner chambers
Minimum range between wall is H2, and inner chambers are H4 along the width of the axial direction of centrifugation blade, wherein H4/10≤H1≤
3H4/10；H4/2≤H2≤4H4/5.
Preferably, side groove include along the rear wall from inner chambers towards the direction of the front side wall of inner chambers successively
First side, second side, third side, four side, the 5th side and the 6th side of connection, wherein first side connect
To the side wall of inner chambers, the 6th side is connected to the front side wall of inner chambers, third side, four side and the 5th side shape
At opening the protrusion protruded towards inner chambers is formed towards the U-type groove of inner chambers, first side and second side.
Preferably, the angle between the madial wall for the inner chambers that first side and the first side are connected is α 1=
80 °~90 °；Angle between first side and second side is 2=100 °~110 ° α；Between second side and third side
Angle be 3=120 °~130 ° α；4=90 ° of angle α between third side and four side；Four side and the 5th side
Between angle be 5=120 °~130 ° α.
Preferably, between each adjacent side it is arc transition connection.
According to another aspect of the present invention, a kind of backward tilt centrifugal blower, including backward tilt centrifugation blade are provided, is also wrapped
Above-mentioned noise reducing casing is included, centrifugation blade is arranged in the inner chambers of noise reducing casing.
Preferably, when noise reducing casing includes volute tongue, the minimum clearance between centrifugation blade and volute tongue is 10 to 15cm.
Preferably, when forward recess is L3 along the opening width in the central axial direction of centrifugation blade, from
A diameter of D of heart fan blade, 0.4D≤L3≤0.6D.
Preferably, when side groove includes U-type groove, the distance between the bottom wall of U-type groove and the central axis of centrifugation blade
For L1, the distance between the opening vertex of U-type groove and the central axis of centrifugation blade are L2, a diameter of D of centrifugation blade,
0.38D≤L1≤0.42D, 0.36D≤L2≤0.40D.
In accordance with a further aspect of the present invention, a kind of air conditioner, including backward tilt centrifugal blower, backward tilt centrifugation are provided
Wind turbine is above-mentioned backward tilt centrifugal blower.
Noise reducing casing provided by the invention includes the inner chambers for installing centrifugation blade, the side side of inner chambers
The noise reduction groove being connected to inner chambers is provided on wall.By opening up drop on the side wall of the inner chambers of installation centrifugation blade
It makes an uproar groove, volute shape can be transformed by noise reduction groove so that volute shape has more with backward tilt centrifugation blade
Good matching improves air-flow character of the backward tilt centrifugation blade in spiral case, aerodynamic noise driving source is eliminated, after reduction
The noise of formula of inclining centrifugation blade.
Description of the drawings
Fig. 1 is the sectional structure chart of the noise reducing casing of the embodiment of the present invention；
Fig. 2 is the overlooking structure figure of the noise reducing casing of the embodiment of the present invention；
Fig. 3 is the enlarged structure schematic diagram at the Q of Fig. 2.
Reference numeral is expressed as：
1, inner chambers；2, centrifugation blade；3, forward recess；4, side groove；5, volute tongue；6, first side；7, second side；
8, third side；9, four side；10, the 5th side；11, the 6th side；12, U-type groove.
Specific implementation mode
In conjunction with referring to shown in Fig. 1 to 3, according to an embodiment of the invention, noise reducing casing includes for installing centrifugation blade 2
Inner chambers 1 are provided with the noise reduction groove being connected to inner chambers 1 on the side side wall of inner chambers 1.
By opening up noise reduction groove on the side wall of the inner chambers 1 of installation centrifugation blade, noise reduction groove pair can be passed through
Volute shape is transformed so that volute shape has better matching with backward tilt centrifugation blade, improves backward tilt centrifugation
Air-flow character of the fan blade in spiral case eliminates aerodynamic noise driving source, reduces the noise of backward tilt centrifugation blade.
Preferably, noise reduction groove includes the forward recess being located on the side wall of 2 front side of centrifugation blade being arranged in inner chambers
3；And/or noise reduction groove includes the side groove 4 on the side wall of 2 side of centrifugation blade being arranged in inner chambers.
Noise reducing casing includes volute tongue 5, and side groove 4 is arranged in volute tongue 5, to improve to the shape of volute tongue 5 so that
Volute tongue 5 can form more good air flow property energy with centrifugation blade 2.
In the present embodiment, noise reduction groove includes simultaneously forward recess 3 and side groove 4, so as to more efficiently improve
The air-flow character of volute tongue structure and centrifugation blade 2 effectively reduces the operating noise of centrifugal blower, improves noise quality.
Preferably, volute tongue 5 is parallel with the pivot center of centrifugation blade 2 towards the side of centrifugation blade 2 so that centrifugation wind
For leaf 2 during being coordinated with volute tongue 5, gas stream dynamic stability is balanced, is not likely to produce turbulence, reduces gas flowing and makes an uproar
Sound.
Inner chambers 1 are H4, axial direction of the forward recess 3 along centrifugation blade 2 along the width of the axial direction of centrifugation blade 2
Depth away from the direction recess of inner chambers 1 is H3, wherein H4/20≤H3≤3H4/10.Preferably, H3=H4/10.
Preferably, in the plane of the front face being parallel to the central rotating shaft of centrifugation blade 2 and perpendicular to inner chambers 1,
Forward recess 3 is symmetrical about the central axis of centrifugation blade 2.
Forward recess 3 is L3, the edge of forward recess 3 along the opening width in the central axial direction of centrifugation blade 2
It is L4, wherein L4 ＜ L3 bottom width in the central axial direction of centrifugation blade 2, and forward recess 3 is from opening edge
Edge between bottom margin be arc transition.
Side groove 4 includes U-type groove 12, and the width of U-type groove 12 is H1, the rear side of the side wall of U-type groove 12 apart from inner chambers 1
Minimum range between wall is H2, and inner chambers 1 are H4 along the width of the axial direction of centrifugation blade 2, wherein H4/10≤H1≤
3H4/10；H4/2≤H2≤4H4/5.Preferably, H1=H4/5, H2=2H4/3.
For the side groove 4 being arranged in volute tongue 5, side groove 4 include along the rear wall from inner chambers 1 towards
The sequentially connected first side 6 in direction of the front side wall of inner chambers 1, second side 7, third side 8, four side the 9, the 5th
Side 10 and the 6th side 11, wherein first side 6 are connected to the side wall of inner chambers 1, and it is empty that the 6th side 11 is connected to inside
The front side wall of chamber 1, third side 8, four side 9 and the 5th side 10 form U-type groove 12 of the opening towards inner chambers 1, the
A side 6 and second side 7 form the protrusion protruded towards inner chambers 1.
Angle between the madial wall for the inner chambers 1 that first side 6 and the first side 6 are connected be α 1=80 °~
90°；Angle between first side 6 and second side 7 is 2=100 °~110 ° α；Between second side 7 and third side 8
Angle is 3=120 °~130 ° α；4=90 ° of angle α between third side 8 and four side 9；Four side 9 and the 5th side
Angle between side 10 is 5=120 °~130 ° α.By above-mentioned structure design, it can be substantially reduced low frequency noise peak value, kept away
Exempt from air duct howling occur.
Preferably, between each adjacent side it is arc transition connection.
According to an embodiment of the invention, backward tilt centrifugal blower includes backward tilt centrifugation blade, further includes above-mentioned noise reduction
Spiral case, centrifugation blade 2 are arranged in the inner chambers 1 of noise reducing casing.
When noise reducing casing includes volute tongue 5, the minimum clearance between centrifugation blade 2 and volute tongue 5 is 10 to 15cm.
When forward recess 3 is L3 along the opening width in the central axial direction of centrifugation blade 2, centrifugation blade
2 a diameter of D, 0.4D≤L3≤0.6D.Preferably, L3=0.5D.
When side groove 4 includes U-type groove 12, the distance between the bottom wall of U-type groove 12 and the central axis of centrifugation blade 2 are
L1, the distance between central axis of opening vertex and the centrifugation blade 2 of U-type groove 12 are L2, a diameter of D of centrifugation blade 2,
0.38D≤L1≤0.42D, 0.36D≤L2≤0.40D.Preferably, L1=0.4D, L2=0.38D.By setting noise reducing casing
Various pieces structure size relationship, noise reducing casing structure can be advanced optimized, low frequency noise peak value is further decreased, keep away
Exempt from air duct howling occur.
After volute structure using the present invention, in the case where spiral case other sizes are constant, using the snail of this structure
Shell phase reduces 3.4 decibels of noise total value for former spiral case, directly reduces 12.4 decibels to peak value, which significantly improves make an uproar
Sound sound quality so that the type of exploitation is developed using small shell, and rotating speed increases etc. under the influence of unfavorable factors, noise experience and
Comfort rises against the tendency, and realizes the good combination of air conditioner miniaturization and comfortableization, effectively increases the usage experience of user.
According to an embodiment of the invention, air conditioner includes backward tilt centrifugal blower, which is above-mentioned
Backward tilt centrifugal blower.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the guarantor of the present invention
Protect range.
Claims (16)
1. a kind of noise reducing casing, which is characterized in that the inner chambers (1) including being used to install centrifugation blade (2), the inside are empty
The noise reduction groove being connected to the inner chambers (1) is provided on the side side wall of chamber (1).
2. noise reducing casing according to claim 1, which is characterized in that the noise reduction groove includes setting in inside sky
Forward recess (3) on the side wall of chamber (1) being located on front side of the centrifugation blade (2)；And/or the noise reduction groove includes setting
In the side groove (4) on the side wall of the centrifugation blade (2) side of the inner chambers (1).
3. noise reducing casing according to claim 2, which is characterized in that the noise reducing casing includes volute tongue (5), and the side is recessed
Slot (4) is arranged in the volute tongue (5).
4. noise reducing casing according to claim 3, which is characterized in that the volute tongue (5) is towards the centrifugation blade (2)
Side is parallel with the pivot center of the centrifugation blade (2).
5. noise reducing casing according to claim 2, which is characterized in that the inner chambers (1) are along the centrifugation blade (2)
Axial direction width be H4, the forward recess (3) along the centrifugation blade (2) axial direction away from the inside
The depth of the direction recess of cavity (1) is H3, wherein H4/20≤H3≤3H4/10.
6. noise reducing casing according to claim 2, which is characterized in that turn at the center for being parallel to the centrifugation blade (2)
In the plane of axis and front face perpendicular to the inner chambers (1), the forward recess (3) is about the centrifugation blade (2)
Central axis is symmetrical.
7. noise reducing casing according to claim 6, which is characterized in that the forward recess (3) is along perpendicular to the centrifugation
Opening width in the central axial direction of fan blade (2) is L3, the forward recess (3) along perpendicular to the centrifugation blade
(2) the bottom width in central axial direction is L4, wherein L4 ＜ L3, and the forward recess (3) is from open edge to bottom
It is arc transition between edge.
8. noise reducing casing according to claim 2, which is characterized in that the side groove (4) includes U-type groove (12), the U
The width of type groove (12) is H1, the most narrow spacing between the rear wall of the side wall of the U-type groove (12) apart from the inner chambers (1)
From for H2, the width of axial direction of the inner chambers (1) along the centrifugation blade (2) is H4, wherein H4/10≤H1≤
3H4/10；H4/2≤H2≤4H4/5.
9. noise reducing casing according to claim 2, which is characterized in that the side groove (4) includes along from the inside
The rear wall of cavity (1) is towards the sequentially connected first side in direction (6) of the front side wall of the inner chambers (1), the second side
Side (7), third side (8), four side (9), the 5th side (10) and the 6th side (11), wherein the first side (6)
It is connected to the side wall of the inner chambers (1), the 6th side (11) is connected to the front side wall of the inner chambers (1), institute
It states third side (8), four side (9) and the 5th side (10) and forms U-type groove of the opening towards the inner chambers (1)
(12), the first side (6) and the second side (7) form the protrusion protruded towards the inner chambers (1).
10. noise reducing casing according to claim 9, which is characterized in that the first side (6) and the first side (6)
Angle between the madial wall of the inner chambers (1) connected is 1=80 °~90 ° α；The first side (6) and described
Angle between second side (7) is 2=100 °~110 ° α；Between the second side (7) and the third side (8)
Angle is 3=120 °~130 ° α；4=90 ° of angle α between the third side (8) and the four side (9)；Described
Angle between four side (9) and the 5th side (10) is 5=120 °~130 ° α.
11. noise reducing casing according to claim 9, which is characterized in that be arc transition connection between each adjacent side.
12. a kind of backward tilt centrifugal blower, which is characterized in that further include in claim 1 to 11 including backward tilt centrifugation blade
Any one of them noise reducing casing, the centrifugation blade (2) are arranged in the inner chambers (1) of the noise reducing casing.
13. backward tilt centrifugal blower according to claim 12, which is characterized in that when the noise reducing casing includes volute tongue
(5) when, the minimum clearance between the centrifugation blade (2) and the volute tongue (5) is 10 to 15cm.
14. backward tilt centrifugal blower according to claim 12, which is characterized in that when the forward recess (3) is along vertical
When the opening width in the central axial direction of the centrifugation blade (2) is L3, a diameter of D of the centrifugation blade (2),
0.4D≤L3≤0.6D。
15. backward tilt centrifugal blower according to claim 12, which is characterized in that when the side groove (4) includes U-type groove
(12) when, the distance between the bottom wall of the U-type groove (12) and the central axis of the centrifugation blade (2) are L1, the U-type groove
(12) the distance between opening vertex and the central axis of the centrifugation blade (2) are L2, the diameter of the centrifugation blade (2)
For D, 0.38D≤L1≤0.42D, 0.36D≤L2≤0.40D.
16. a kind of air conditioner, including backward tilt centrifugal blower, which is characterized in that the backward tilt centrifugal blower is claim
Backward tilt centrifugal blower described in any one of 12 to 15.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095275.6A CN108457903B (en) | 2018-01-31 | 2018-01-31 | Noise reduction spiral case, backward tilting type centrifugal fan and air conditioner |
| PCT/CN2018/104434 WO2019148840A1 (en) | 2018-01-31 | 2018-09-06 | Noise reduction volute, backward-tilting centrifugal fan, and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810095275.6A CN108457903B (en) | 2018-01-31 | 2018-01-31 | Noise reduction spiral case, backward tilting type centrifugal fan and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108457903A true CN108457903A (en) | 2018-08-28 |
| CN108457903B CN108457903B (en) | 2023-08-29 |
Family
ID=63239120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810095275.6A Active CN108457903B (en) | 2018-01-31 | 2018-01-31 | Noise reduction spiral case, backward tilting type centrifugal fan and air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108457903B (en) |
| WO (1) | WO2019148840A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954754A (en) * | 2018-10-24 | 2018-12-07 | 奥克斯空调股份有限公司 | air channel structure and air conditioner |
| WO2019148840A1 (en) * | 2018-01-31 | 2019-08-08 | 格力电器（武汉）有限公司 | Noise reduction volute, backward-tilting centrifugal fan, and air conditioner |
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|---|---|---|---|---|
| JPH05280497A (en) * | 1992-03-30 | 1993-10-26 | Nippondenso Co Ltd | Multiblade blower |
| JPH08312592A (en) * | 1995-05-19 | 1996-11-26 | Akaishi Kinzoku Kogyo Kk | Opening part structure of casing for blower |
| CN102042264A (en) * | 2009-10-10 | 2011-05-04 | 珠海格力电器股份有限公司 | Volute tongue with bionic structure and volute using same |
| CN203023127U (en) * | 2012-12-07 | 2013-06-26 | Tcl空调器(中山)有限公司 | Floor air conditioner and volute thereof |
| CN204084796U (en) * | 2014-07-05 | 2015-01-07 | 慈溪欧能电器有限公司 | A kind of air inlet shell structure |
| CN208185061U (en) * | 2018-01-31 | 2018-12-04 | 珠海格力电器股份有限公司 | Noise reduction volute, backward tilting type centrifugal fan and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61192900A (en) * | 1985-02-20 | 1986-08-27 | Matsushita Refrig Co | Centrifugal blower |
| CN201513386U (en) * | 2009-10-10 | 2010-06-23 | 珠海格力电器股份有限公司 | Volute tongue with bionic structure and volute using same |
| CN204553347U (en) * | 2015-03-17 | 2015-08-12 | 广东美的制冷设备有限公司 | The spiral case of centrifugal blower, centrifugal blower and air conditioner |
| CN108457903B (en) * | 2018-01-31 | 2023-08-29 | 珠海格力电器股份有限公司 | Noise reduction spiral case, backward tilting type centrifugal fan and air conditioner |
-
2018
- 2018-01-31 CN CN201810095275.6A patent/CN108457903B/en active Active
- 2018-09-06 WO PCT/CN2018/104434 patent/WO2019148840A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05280497A (en) * | 1992-03-30 | 1993-10-26 | Nippondenso Co Ltd | Multiblade blower |
| JPH08312592A (en) * | 1995-05-19 | 1996-11-26 | Akaishi Kinzoku Kogyo Kk | Opening part structure of casing for blower |
| CN102042264A (en) * | 2009-10-10 | 2011-05-04 | 珠海格力电器股份有限公司 | Volute tongue with bionic structure and volute using same |
| CN203023127U (en) * | 2012-12-07 | 2013-06-26 | Tcl空调器(中山)有限公司 | Floor air conditioner and volute thereof |
| CN204084796U (en) * | 2014-07-05 | 2015-01-07 | 慈溪欧能电器有限公司 | A kind of air inlet shell structure |
| CN208185061U (en) * | 2018-01-31 | 2018-12-04 | 珠海格力电器股份有限公司 | Noise reduction volute, backward tilting type centrifugal fan and air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019148840A1 (en) * | 2018-01-31 | 2019-08-08 | 格力电器（武汉）有限公司 | Noise reduction volute, backward-tilting centrifugal fan, and air conditioner |
| CN108954754A (en) * | 2018-10-24 | 2018-12-07 | 奥克斯空调股份有限公司 | air channel structure and air conditioner |
| CN108954754B (en) * | 2018-10-24 | 2023-09-15 | 奥克斯空调股份有限公司 | Air duct structure and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108457903B (en) | 2023-08-29 |
| WO2019148840A1 (en) | 2019-08-08 |
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