CN105298872B - Blower fan - Google Patents
Blower fan Download PDFInfo
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- CN105298872B CN105298872B CN201510846426.3A CN201510846426A CN105298872B CN 105298872 B CN105298872 B CN 105298872B CN 201510846426 A CN201510846426 A CN 201510846426A CN 105298872 B CN105298872 B CN 105298872B
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- housing
- blower fan
- impeller
- gas
- motor
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Abstract
The present invention relates to technical field of medical instruments, more particularly, to a kind of blower fan.The blower fan includes housing, impeller and motor；Air inlet and air outlet are provided with the housing；The impeller is located at the inside of the housing, and close to the air inlet；Impeller described in the output shaft drive connection of the motor, so that direction flowing of the gas along the air inlet towards the air outlet；The space that the inside of the housing is used to accommodate gas is gas flow space in shell；The ratio range of the volume of gas flow space and the volume of the impeller is 15 30 in the shell；The housing has exhaust air flue, and the exhaust air flue connects with the air outlet；Barrier piece is provided with the exhaust air flue, so that the exhaust air flue is divided into two air channels；The section of the barrier piece is S-shaped and goes out the direction extension of wind flow along the gas.It is an object of the invention to provide a kind of blower fan, to improve the stability of the pressure of the output of blower fan and flow.
Description
Technical field
The present invention relates to technical field of medical instruments, more particularly, to a kind of blower fan.
Background technology
Blower fan is widely used in medical field, especially lung ventilator.In current clinical medicine, lung ventilator is as an energy
The effective means of artificial substituting expiratory positive airway pressure function, respiratory failure caused by a variety of causes has been commonly used to it, during major operation
In anesthesia respiration management, Breathing Suppotion treatment and emergency resuscitation, highly important position is occupied in Modern Medical Field.Breathing
Machine is that one kind can play prevention and treatment respiratory failure, reduces complication, saves and extends the vital of patients ' lives
Medical Devices.
But the pressure and instability of flow of existing blower fan output, the quality of the Medical Devices such as lung ventilator is directly affected,
Even influence to save and extend patients ' lives.
The content of the invention
It is an object of the invention to provide a kind of blower fan, to improve the stability of the pressure of the output of blower fan and flow.
The invention provides a kind of blower fan, including housing, impeller and motor；Air inlet and air-out are provided with the housing
Mouthful；
The impeller is located at the inside of the housing, and close to the air inlet；
Impeller described in the output shaft drive connection of the motor, so that gas is along the air inlet towards the air outlet
Flow in direction；
The space that the inside of the housing is used to accommodate gas is gas flow space in shell；Gas flowing is empty in the shell
Between the ratio range of volume of volume and the impeller be 15-30；
The housing has exhaust air flue, and the exhaust air flue connects with the air outlet；
Barrier piece is provided with the exhaust air flue, so that the exhaust air flue is divided into two air channels；The barrier piece
Section it is S-shaped and along the gas go out wind flow direction extend.
Further, the ratio range of the volume of gas flow space and the volume of the impeller is 20-24 in the shell.
Further, the air inlet is along the axially arranged of the impeller；Radial direction of the air outlet along the impeller is set
Put.
Further, the air inlet is provided with conducting element, and company is fixed in the outer surface of the conducting element and the housing
Connect；
The axial direction of output shaft of the conducting element along the motor helically wire.
Further, the impeller includes chassis and the multiple blades being arranged on the chassis；The multiple blade around
The center on the chassis is in uniform, arranged for interval；
Height of the blade close to the one end at the center on the chassis is more than the other end at the center away from the chassis
Height；
The blade is connected with the chassis in rounding off.
Further, the outer surface of the housing is installed with locating dowel and shockproof positioning protrusion rib respectively；It is described shockproof fixed
Position protrusion rib is in a ring.
Further, the housing includes upper shell and lower house；The air inlet is located on the lower house, it is described go out
Air port is located at the junction of the upper shell and the lower house；
The upper shell is evenly arranged with multiple locating dowels, and the lower house is provided with the shockproof positioning protrusion
Rib；The bearing of trend of the shockproof positioning protrusion rib is consistent with the axial direction of the locating dowel；
The upper shell is fastened and connected with the lower house by buckle.
Further, the upper shell is provided with the groove being adapted with the motor, and the motor is fixedly mounted on institute
State in groove；
Shock absorber part is provided between the motor and the groove.
Further, the contact surface of the upper shell and the lower house is provided with seal groove, and the seal groove is described in
Contact surface extends；Sealing ring is provided with the seal groove.
Further, the motor uses brushless electric machine；The rotating speed of the brushless electric machine is 6000rpm-20000rpm；
The material of the housing is PC plastic；The inner chamber of the housing is vertical cyclindrical shape；
The material of the barrier piece is copper, and the thickness of the barrier piece is 0.2mm-1mm.
At work, the output shaft driving wheel rotation of motor, impeller makes gas from air inlet to blower fan provided by the invention
Gas flow space in into shell, then flowed out from air outlet；With reference to the high speed rotating speed of motor, potential energy is converted to according to kinetic energy
Principle, the impeller for making to rotate at a high speed accelerate gas, then slow down in the shell of certain volume in gas flow space, change stream
To making kinetic energy be converted into potential energy, the potential energy is pressure energy；Wherein, the volume of gas flow space and the volume of impeller in shell
Ratio range when being 15-30, the pressure and flow that the gas during blower fan work exports from air outlet are more stable, more accord with
The requirement of needed by human body is closed, especially meets demand of the patient to medicine equipments such as lung ventilators；In addition, exhaust air flue is provided with barrier
During piece, the friction area of output gas and air-out passage is added, exhaust air flue is divided into two air channels, output gas is existed
Distribution is more uniform in exhaust air flue, solve cylinder, the central gas stream flow velocity of the exhaust air flue of square column type it is very fast, close to going out
The problem of air-flow velocity of wind air channel inwall is slower, make the air-flow of output more uniform, further increase the output stream of blower fan
The stability of amount.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the front view of blower fan provided in an embodiment of the present invention；
Fig. 2 is the top view of blower fan provided in an embodiment of the present invention；
Fig. 3 is the front view of the upper shell of blower fan provided in an embodiment of the present invention；
Fig. 4 is the top view of the upper shell shown in Fig. 3；
Fig. 5 is the front view of the lower house of blower fan provided in an embodiment of the present invention；
Fig. 6 is the top view of the lower house shown in Fig. 5；
Fig. 7 is the front view of the impeller of blower fan provided in an embodiment of the present invention；
Fig. 8 is the top view of the impeller shown in Fig. 7；
Fig. 9 is the front view of the air outlet of blower fan provided in an embodiment of the present invention.
Reference：
1- housings；Gas flow space in 11- shells；12- locating dowels；
The shockproof positioning protrusion ribs of 13-；14- upper shells；141- grooves；
15- lower houses；2- impellers；21- chassis；
22- blades；3- motors；4- air inlets；
5- air outlets；6- conducting element 7- buckles；
8- exhaust air flues；81- barrier pieces.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Embodiment
Referring to shown in Fig. 1-Fig. 9, a kind of blower fan is present embodiments provided；Fig. 1 is the main view for the blower fan that the present embodiment provides
Figure, Fig. 2 are the top view of blower fan；Fig. 3 is the front view of upper shell, and Fig. 4 is the top view of upper shell；Fig. 5 is the master of lower house
View, Fig. 6 are the top view of lower house；Fig. 7 is the front view of impeller, and Fig. 8 is the top view of impeller；Fig. 9 is the air-out of blower fan
The front view of mouth；In order to more clearly show that structure, Fig. 1, Fig. 7 are sectional view.
Referring to the blower fan that shown in Fig. 1-Fig. 9, the present embodiment provides, including housing 1, impeller 2 and motor 3；Set on housing 1
There are air inlet 4 and air outlet 5.
Impeller 2 is located at the inside of housing 1, and close to air inlet 4.
The output shaft drive connection impeller 2 of motor 3, so that direction flowing of the gas along air inlet 4 towards air outlet 5.
The space that the inside of housing 1 is used to accommodate gas is gas flow space 11 in shell；Gas flow space 11 in shell
The ratio range of volume of volume and impeller 2 be 15-30.
Housing 1 has exhaust air flue 8, and exhaust air flue 8 connects with air outlet 5.
Barrier piece 81 is provided with exhaust air flue 8, so that exhaust air flue 8 is divided into two air channels；The section of barrier piece 81
Direction that is S-shaped and going out wind flow along gas extends.The material of barrier piece 81 such as can be copper, iron, stainless steel, plastics,
Preferably, the material of barrier piece 81 is copper；The thickness of barrier piece 81 is 0.2mm-1mm, to reduce the air-out of the occupancy of barrier piece 81
The air-out space in air channel 8.
Described in the present embodiment during blower fan work, the output shaft driving impeller 2 of motor 3 rotates, and impeller 2 makes gas from air intake
Mouth 4 enters gas flow space 11 in shell, is then flowed out from air outlet 5；With reference to the high speed rotating speed of motor 3, changed according to kinetic energy
For the principle of potential energy, the impeller 2 for making to rotate at a high speed accelerates gas, then in the shell of certain volume in gas flow space 11
Slow down, change flow direction, kinetic energy is converted into potential energy, the potential energy is pressure energy；Wherein, in shell gas flow space 11 volume
When ratio range with the volume of impeller 2 is 15-30, pressure and flow that the gas during blower fan work exports from air outlet 5
It is more stable, the requirement of needed by human body is more conformed to, especially meets demand of the patient to medicine equipments such as lung ventilators；In addition, go out
When wind air channel 8 is provided with barrier piece 81, the friction area of output gas and air-out passage 8 is added, exhaust air flue 8 is divided into
Two air channels, make output gas distribution in exhaust air flue 8 more uniform, solve cylindrical, square column type exhaust air flue
The problem of air-flow velocity of very fast, the close exhaust air flue inwall of central gas stream flow velocity is slower, makes the air-flow of output more uniform, enters
One step improves the stability of the output flow of blower fan.
Gas flow space 11 also has the function that to be radiated to the motor 3 to run at high speed in shell, extends motor 3
Service life, the service life of motor 3 is set to be for more than 53000 hours.
Preferably, the ratio range of the volume of gas flow space 11 and the volume of impeller 2 is 20-24 in shell；The ratio
The pressure and the stability of flow that gas exports from air outlet 5 when scope further increases the blower fan work, further accord with
The requirement of needed by human body has been closed, has especially met demand of the patient to medicine equipments such as lung ventilators.
Wherein, motor 3 uses brushless electric machine, it is preferable that motor 3 uses brshless DC motor；The rotating speed of brushless electric machine is
6000rpm-20000rpm, rotated so as to the output shaft high-speed driving impeller 2 of motor 3, form the gas of suitable needed by human body
Output pressure and flow；Table one list the output pressure of the rotating speed of part motor 3 and the air outlet 5 of blower fan, output flow it
Between corresponding numerical value.
One blower motor rotating speed of table and output pressure, output flow parameter
In the alternative of this implementation, air inlet 4 is axially arranged along impeller 2；Air outlet 5 is radially arranged along impeller 2；
To be converted to the principle of potential energy according to kinetic energy, the impeller 2 using high speed rotation accelerates gas, and gas is from axially into impeller
2, output is radially redirected when flowing through gas flow space 11 in impeller 2 and shell, because of the gas in gas flow space 11 in shell
Change flow direction and further result in deceleration, and decelerating effect further converts kinetic energy into pressure energy, easily facilitates to be formed
Meet the pressure and flow of needed by human body.
In the alternative of this implementation, conducting element 6 is provided with air inlet 4, the outer surface of conducting element 6 and housing 1 is fixed
Connection；The axial direction of output shaft of the conducting element 6 along motor 3 helically wire.The conducting element 6 of zigzag shape can preferably guide gas
Body flows into air inlet 4, so that gas spiral enters air inlet 4, so that the inflow path of gas does not have the turn of wide-angle, no
Local eddy currents can be produced, meet the movement locus of gas, noise caused by gas flowing can be reduced, additionally it is possible to increase and leaf
The contact air inflow of wheel 2.
In the alternative of this implementation, impeller 2 includes chassis 21 and the multiple blades 22 being arranged on chassis 21；Multiple leaves
Piece 22 is around the center on chassis 21 in uniform, arranged for interval；It is easy to improve stability when impeller 2 rotates at a high speed, reduces Yin Ye
The noise that the rotation of wheel 2 is unstable and brings, also extend the service life of impeller 2.Preferably, blade 22 is ten；Preferably,
Blade 22 is formed in one with chassis 21, is easy to the production and processing of impeller 2.
Height of the blade 22 close to the one end at the center on chassis 21 is more than the height of the other end at the center away from chassis 21；
In order to which gas is flowed into shell in gas flow space 11 along blade 22.
Blade 22 is connected with chassis 21 in rounding off；To reduce the frictional force between impeller 2 and gas, and then reduce
Noise caused by gas flowing, and gas is reduced in energy consumption unnecessary caused by the surface of impeller 2.
In the alternative of this implementation, the outer surface of housing 1 is installed with locating dowel 12 and shockproof positioning protrusion rib 13 respectively；
Shockproof positioning protrusion rib 13 is in a ring；The quantity of locating dowel 12 is for 1 or multiple, such as can be 1,2,3,5
Deng；By setting locating dowel 12 and shockproof positioning protrusion rib 13, preferably to position, the blower fan is fixed, reduces blower fan work
Caused vibrations, so as to reduce noise caused by vibrations.
In the alternative of this implementation, housing 1 includes upper shell 14 and lower house 15, in order to the assembling of blower fan；Air intake
For mouth 4 on lower house 15, air outlet 5 is located at the junction of upper shell 14 and lower house 15.
Upper shell 14 is evenly arranged with multiple locating dowels 12, and lower house 15 is provided with shockproof positioning protrusion rib 13；It is shockproof fixed
The bearing of trend of position protrusion rib 13 is consistent with the axial direction of locating dowel 12.Shockproof positioning protrusion rib 13 and locating dowel 12 are right respectively
It should be arranged on upper-lower casing 15, make positioning, the fixed blower fan more accurate, be easy to reduce caused by blower fan work and shake
It is dynamic.
In the alternative of this implementation, upper shell 14 is fastened and connected with lower house 15 by buckle 7.Connected using the formula of buckle 7
The mode of connecing installs upper-lower casing 15, and avoid firmly makes junction cracking, stubborn screw very much suddenly using mode connects for screw because twisting screw
Kick the beam and cause poorly sealed；Installation during batch production is also convenient for, mounting process is simplified, most of workers can be made to learn quickly
Meeting simultaneously installs out standard compliant product；The error for each side occur drops to extremely low；Preferably, the quantity of buckle 7 is four,
It is uniformly arranged on blower fan surrounding.
In the alternative of this implementation, upper shell 14 is provided with the groove 141 being adapted with motor 3, and motor 3 is fixedly mounted
In groove 141；To reduce the volume of the blower fan, it is easy to blower fan volume to minimize.
Shock absorber part (belong to prior art, figure not shown in) is provided between motor 3 and groove 141, during reducing work
Between motor 3 and housing 1 because of vibrations and caused by noise.The shock absorber part is such as can be rubber blanket, silicagel pad, spring.
In the alternative of this implementation, the contact surface of upper shell 14 and lower house 15 is provided with seal groove and (not shown in figure
Go out), seal groove extends along contact surface；Sealing ring (belong to prior art, figure not shown in) is provided with seal groove.Pass through sealing
Circle prevents pressure in housing 1 from being revealed by the connecting sewing between upper-lower casing 15, namely to prevent that the gas in housing 1 from passing through upper
Connecting sewing leakage between lower house 15, has ensured the pressure and flow of the blower fan output gas.The material of the sealing ring
Such as can be rubber, silica gel etc..
In the alternative of this implementation, the material of housing 1 is PC plastic.The blower fan used in the market be mostly ABS,
The materials such as ABS and PC mixture, metal are made, and this blower fan uses the upper lower casing of full PC materials, product highly transparent, is easy to send out
Some failures, the problem of existing blower fan；During as found to have in general flabellum problem, or there is exception in flabellum or casing, can be with
With eye observation, without overhaul.
In the alternative of this implementation, the inner chamber of housing 1 is approximately vertical cyclindrical shape for the inner chamber of vertical cyclindrical shape or housing 1；I.e.
The inner chamber of upper shell 14 and lower house 15 is vertical cyclindrical shape, or the inner chamber of upper shell 14 and lower house 15 is approximately right cylinder
Shape；Namely the profile of gas flow space 11 for vertical cyclindrical shape or is approximately vertical cyclindrical shape in shell；To ensure in certain shell
On the premise of gas flow space 11, the volume of blower fan is reduced；To reduce the resistance of gas gas flow space 11 in shell.
It is illustrated below in order to more be apparent from the blower fan：
Blower fan uses the housing of vertical cyclindrical shape, a diameter of 85mm-100mm of blower fan, is highly 60mm-80mm.
Housing integral diameter is 85mm-100mm, is highly 35mm-45mm；Thickness of shell is 1.5mm-3mm.
Housing includes upper shell and lower house, and upper shell is fastened and connected with lower house by square combination buckle, square group
The quantity for closing buckle is four.
Upper shell is installed with three locating dowels；The a diameter of 8mm-10mm of locating dowel.
Air inlet is circular, diameter 15mm-25mm.
Air outlet is circular, diameter 15mm-25mm.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (7)
1. a kind of blower fan, it is characterised in that including housing, impeller and motor；Air inlet and air outlet are provided with the housing；
The impeller is located at the inside of the housing, and close to the air inlet；
Impeller described in the output shaft drive connection of the motor, so that gas is along the air inlet towards the direction of the air outlet
Flowing；
The space that the inside of the housing is used to accommodate gas is gas flow space in shell；Gas flow space in the shell
The ratio range of volume and the volume of the impeller is 15-30；
The housing has exhaust air flue, and the exhaust air flue connects with the air outlet；
Barrier piece is provided with the exhaust air flue, so that the exhaust air flue is divided into two air channels；The barrier piece is cut
Face is S-shaped and goes out the direction extension of wind flow along the gas；
The air inlet is axially arranged along the impeller；The air outlet is radially arranged along the impeller；
The air inlet is provided with conducting element, and the conducting element is fixedly connected with the outer surface of the housing；
The axial direction of output shaft of the conducting element along the motor helically wire；
The outer surface of the housing is installed with locating dowel and shockproof positioning protrusion rib respectively；The shockproof positioning protrusion rib is in ring
Shape；
The motor uses brushless electric machine；The rotating speed of the brushless electric machine is 6000rpm-20000rpm.
2. blower fan according to claim 1, it is characterised in that the volume of gas flow space and the impeller in the shell
The ratio range of volume be 20-24.
3. blower fan according to claim 1 or 2, it is characterised in that the impeller includes chassis and is arranged on the chassis
On multiple blades；Multiple blades are around the center on the chassis in uniform, arranged for interval；
Height of the blade close to the one end at the center on the chassis is more than the height of the other end at the center away from the chassis
Degree；
The blade is connected with the chassis in rounding off.
4. blower fan according to claim 1 or 2, it is characterised in that the housing includes upper shell and lower house；It is described enter
Air port is located on the lower house, and the air outlet is located at the junction of the upper shell and the lower house；
The upper shell is evenly arranged with multiple locating dowels, and the lower house is provided with the shockproof positioning protrusion rib；Institute
The bearing of trend for stating shockproof positioning protrusion rib is consistent with the axial direction of the locating dowel；
The upper shell is fastened and connected with the lower house by buckle.
5. blower fan according to claim 4, it is characterised in that the upper shell be provided with the motor be adapted it is recessed
Groove, the motor are fixedly mounted in the groove；
Shock absorber part is provided between the motor and the groove.
6. blower fan according to claim 4, it is characterised in that the contact surface of the upper shell and the lower house is provided with
Seal groove, the seal groove extend along the contact surface；Sealing ring is provided with the seal groove.
7. blower fan according to claim 1 or 2, it is characterised in that the material of the housing is PC plastic；The housing
Inner chamber is vertical cyclindrical shape；
The material of the barrier piece is copper, and the thickness of the barrier piece is 0.2mm-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846426.3A CN105298872B (en) | 2015-11-27 | 2015-11-27 | Blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846426.3A CN105298872B (en) | 2015-11-27 | 2015-11-27 | Blower fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105298872A CN105298872A (en) | 2016-02-03 |
| CN105298872B true CN105298872B (en) | 2017-12-22 |
Family
ID=55196524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510846426.3A Active CN105298872B (en) | 2015-11-27 | 2015-11-27 | Blower fan |
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| Country | Link |
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| CN (1) | CN105298872B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345527B (en) * | 2016-05-05 | 2023-09-19 | 珠海松下马达有限公司 | Blower housing |
| CN106351880A (en) * | 2016-11-21 | 2017-01-25 | 南京磁谷科技有限公司 | Split type volute |
| KR102428081B1 (en) * | 2020-11-04 | 2022-08-04 | (주)동일전자 | Showcase fan waterproof structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201224290A (en) * | 2010-12-01 | 2012-06-16 | Foxconn Tech Co Ltd | Heat dissipation device and centrifugal fan thereof |
| CN202546939U (en) * | 2012-04-17 | 2012-11-21 | 珠海格力电器股份有限公司 | Cabinet air conditioner |
| CN204140495U (en) * | 2014-10-10 | 2015-02-04 | 珠海格力电器股份有限公司 | A kind of centrifugal blower volute, centrifugal blower and air conditioner |
-
2015
- 2015-11-27 CN CN201510846426.3A patent/CN105298872B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201224290A (en) * | 2010-12-01 | 2012-06-16 | Foxconn Tech Co Ltd | Heat dissipation device and centrifugal fan thereof |
| CN202546939U (en) * | 2012-04-17 | 2012-11-21 | 珠海格力电器股份有限公司 | Cabinet air conditioner |
| CN204140495U (en) * | 2014-10-10 | 2015-02-04 | 珠海格力电器股份有限公司 | A kind of centrifugal blower volute, centrifugal blower and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN105298872A (en) | 2016-02-03 |
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