CN106481597A - Impeller and there is its axial flow blower - Google Patents
Impeller and there is its axial flow blower Download PDFInfo
- Publication number
- CN106481597A CN106481597A CN201610451547.2A CN201610451547A CN106481597A CN 106481597 A CN106481597 A CN 106481597A CN 201610451547 A CN201610451547 A CN 201610451547A CN 106481597 A CN106481597 A CN 106481597A
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- China
- Prior art keywords
- blade
- impeller
- aluminium sheet
- axial flow
- conjugant
- 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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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
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- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
-
- 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- 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
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides and abnormal vibrations seldom occurs and can obtain the impeller of high reliability and have its axial flow blower, and the outer peripheral face that impeller (3) has in the wheelboss part (5) of cup-shaped is arranged to radial blade (4) and the aluminium sheet (9) locally arranging on the surface of blade (4).
Description
Technical field
The present invention relates to impeller and there is its axial flow blower.
Background technology
Big vibration is produced sometimes during the on-stream or specific rotating speed of axial flow blower (rotary speed).This is axle stream wind
The covibration that the resonant frequency as characteristic value that the impeller of machine has is consistent with the operating frequency of axial flow blower and causes.?
In the case of propeller-type impeller, blade is supported by single armed, and the impact of therefore resonance is notable.
As industrial propeller-type impeller, it is generally used for the structure that hub portion is provided with the blade of metallic plate.Make
For such impeller it is known to blade be welded in the riveting welded impeller obtained from hub portion and blade is riveted on hub portion
Connect formula impeller.Wherein, the consistency of thickness of each blade of welding impeller, therefore due to large amplitude during resonance, acts on blade
The stress of installation portion is easy to become big.When acting on the change of the stress of installation portion of blade and being big, there is the breakage that blade occurs etc.
Probability.
Therefore, existing axial flow blower is adjusted to the design of electromotor etc. according to the thickness of blade, enabling with
The operating frequency avoiding resonant frequency is operated.
In recent years, with the raising of awareness of saving energy, the operating frequency being made axial flow blower by VFC etc. is changed, to the greatest extent
Possibly reduce the rotating speed of electromotor, thus suppressing the demand of the variable-speed operation of power consumption to improve.In this case, transport
Turn frequency and various values can be set as by user it is therefore desirable to consider the use of the operating frequency in wide scope.When making operating
When frequency changes in wide scope, uprise with the resonant frequency identical probability of blade.In this case it may occur that resonating
Abnormal vibrations and excessive stress that phenomenon causes, the reliability of product significantly reduces.
For example in patent documentation 1, disclose and be provided between the fan cover being fixed on rotor in fan and by this fan
There is the blower fan of the intervention thing of effectiveness in vibration suppression.Additionally, in patent documentation 2, disclose by the surface of blade partly
Arrange steel plate to suppress the axial flow blower of the abnormal vibrations of blade.In axial flow blower described in patent documentation 2, by making leaf
The thickness of slab of piece is partly thickening and increase eigentone, make resonant frequency change.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 4-203296 publication
Patent documentation 2：Japanese Unexamined Patent Publication 2015-086803 publication
Content of the invention
Invent technical task to be solved
Blower fan described in patent documentation 1 be only through installing intervention thing make the vibration producing from rotor caused to wind
The structure that the exciting force of fan reduces, the suppression for fan resonance when making operating frequency change in wide scope does not consider.
In axial flow blower described in patent documentation 2, the weight ratio being arranged at the steel plate of blade is larger, therefore if
Carry out eigentone adjustment and make steel plate thickness of slab thickening, then the centrifugal force producing during the rotation of impeller becomes big.?
In this case, the reliability of product is led to reduce due to excessive, blade breakage of stress of root generation in blade etc..
It is an object of the invention to, little impeller and axle stream of being obtained in that high reliability that abnormal vibrations occur is provided
Blower fan.
For solving the technical scheme of technical task
As the preferred implementation of the impeller of the present invention, impeller is characterised by, including：Wheelboss part in cup-shaped
Outer peripheral face is set to radial multiple blade；With the aluminium sheet locally arranging on the surface of above-mentioned blade.
Additionally, the preferred implementation of the axial flow blower as the present invention, axial flow blower is characterised by, including：Above-mentioned
Impeller in embodiment；With the motor that above-mentioned impeller is carried out with rotation driving.
Invention effect
In accordance with the invention it is possible to realize that abnormal vibrations are few and the impeller and the axial flow blower that are obtained in that high reliability.
Brief description
Fig. 1 is the impeller of embodiment 1 and side view and the front elevation with its axial flow blower.
Fig. 2 is the Section A-A figure of Fig. 1 (b).
Fig. 3 is the plane graph representing the setting blade of impeller in example 2 and the structure of conjugant of aluminium sheet.
Fig. 4 is to represent the plane graph arranging the structure of conjugant of the blade of impeller and aluminium sheet in embodiment 3.
Fig. 5 is to represent the plane graph arranging the structure of conjugant of the blade of impeller and aluminium sheet in example 4.
Specific embodiment
(embodiment 1)
Hereinafter, using accompanying drawing, embodiment is illustrated.
Fig. 1 is the impeller representing embodiment 1 and the figure with its axial flow blower.Fig. 1 (a) represents the side of partial cross section
Figure, Fig. 1 (b) represents front elevation.
In FIG, 1 is motor (motor), and 2 is rotary shaft, and 3 is impeller, and 4 is blade (blade), and 5 is wheel hub
(boss) part, 6 is hub (hub) part, and 7 is packing ring (washer), and 8 is bolt, and 9 is aluminium sheet.
Motor 1 is e.g. powered by the induction electric of variable speed drive by VVVF (variable voltage variable frequency) inversion
Machine, installs propeller-type impeller 3 in its rotary shaft 2 and constitutes the major part of axial flow blower 100.
Although not shown in Fig. 1, impeller 3 is had the substantially cylindric part of referred to as pipeline or sleeve (shroud)
Casing cover, motor 1 is held in this casing.
Impeller 3 is provided with multiple (for 8 in such as Fig. 1) in the outer peripheral face of substantially cup-shaped wheelboss part 5 with radial
Blade 4.The hub part 6 being provided centrally with heavy wall short cylinder shape in wheelboss part 5.Hub part 6 is for pacifying impeller 3
Be loaded on the part of rotary shaft 2, by the through hole at the center making hub part 6 and rotary shaft 2 chimeric after, from hub part 6
Outside across packing ring 7, bolt 8 is tightened, and impeller 3 is installed on 4 rotary shafts 2.
Blade 4 is formed by metal plate such as steel plate.The blade being formed by steel plate for example with there is the blade that resin is made
(blade) the ventilation fan towards average family is compared, is obtained in that Wind Volume, high static pressure.Additionally, by using steel plate
Blade, for example, be obtained in that when being arranged on the equipment such as factory and car body, for fully durable using use environments such as temperature
Property.
Then, impeller 3 is described in detail.Fig. 2 is the Section A-A figure of Fig. 1 (b).
Blade 4 is for example punched into the flat shape of regulation by carrying out pressure processing to steel plate, is integrally formed into substantially
Certain thickness of slab.Aluminium sheet 9 is formed as ratio blade 4 narrow width, overlapping with blade 4 after, for example pass through laser welding or spot welding and leaf
Piece 4 engages.It is derived from aluminium sheet 9 and be partially engageable with the conjugant 10 in blade 4.Conjugant 10 is formed as by pressurization specifying
Curve form.
Aluminium sheet 9 is the sheet material that body is formed based on aluminum.In an embodiment, referred to containing more than 90% with aluminum for main body
Aluminum.As aluminium sheet 9, for example, can use the sheet material being formed by JIS A5052P.
Wheelboss part 5 is, by pressure processing, steel are formed as part obtained by cup-shaped.Blade 4 is welded in wheelboss part
5 outer peripheral face.In addition, in embodiment 1, carry out taking welding impeller blade 4 being welded in wheelboss part 5 and being constituted as a example
Illustrate, but the present invention is not limited to weld impeller, for example, can also be the riveted type leaf that blade 4 is riveted on wheelboss part 5
Wheel.
The feature of embodiment 1 is to be adjusted in the way of engaging aluminium sheet 9 with blade 4 and improve its eigentone
Whole.In addition, the numerical value of the integral multiple of eigentone is resonant frequency.
Eigentone f be generally basede on weight M, the relation of elastic constant (spring constant) K and with following formula (1) table
Show.
When blade 4 applying equation (1) of impeller 3, elastic constant K is corresponding with the torsion degree of blade 4 and degree of flexibility.
That is, blade 4 is more difficult to reverse or be more difficult to bend, then elastic constant K is higher, therefore makes the thickness of blade 4 thicker, elastic constant K gets over
High.As shown in formula (1), the increase of elastic constant K plays a role in the direction improving eigentone f.On the other hand, when making
When blade 4 is thickening, blade 4 weight M of itself also increases.The increase of weight M plays in the direction reducing eigentone f to be made
With.Therefore, in order to improve eigentone f of blade 4, need suppression while making blade 4 be difficult to reverse or be pliable
The increase of weight processed.
In embodiment 1, by blade 4 local engagement aluminium sheet 9, making the thickness of blade 4 thickening substantial portion.By
This, can suppress weight M of conjugant 10 to increase and can improve elastic constant K.Therefore, it is possible to make the intrinsic of conjugant 10
Frequency of vibration f increases, and so that resonant frequency is changed in the high scope of the variable range of the operating frequency than axial flow blower, can keep away
Exempt from covibration.
Additionally, in embodiment 1, as the plate engaging with blade 4, using based on the aluminium sheet 9 of the less aluminum of proportion.
Thus, for example, compared with during the steel plate of the steel with use, aluminum being more than based on proportion, weight when thickness of slab is increased can be suppressed
The increase of amount M.That is, by engaging aluminium sheet 9, its thickness of slab can be increased, improve the elastic constant K of conjugant 10, and suppress
Being significantly increased of weight M of conjugant 10.Thus, for example, compared with the situation using steel plate, thickness of slab can be easily adjusted,
Adjustment eigentone f in broader scope.
Additionally, the low cost of aluminium sheet 9, the increase of manufacturing cost can be suppressed.Additionally, aluminium sheet 9 for example with based on steel
The fusing point of the blade of body is close, therefore, it is possible to easily be welded.
Aluminium sheet 9 and blade 4 are respectively different parts before joint, therefore, it is possible to it can be avoided that the scope of covibration
Interior, the application target according to axial flow blower and use environment, connect on the basis of respective thickness of slab is suitably adjusted
Close.
For example, by making the thickness of slab of aluminium sheet 9 thicker (for example, about more than 2.3mm), it is possible to increase the elasticity of conjugant 10
Constant K, and by making the thickness of slab of blade 4 relatively thin (for example, about below 2.3mm), the increasing of weight M of conjugant 10 can be suppressed
Plus.
Furthermore, it is contemplated that change for the operating frequency being made axial flow blower by VFC etc., reduce motor as far as possible
Rotating speed and suppress the ever-increasing situation of demand of the variable-speed operation of power consumption, and above-mentioned being arranged at axial flow blower
Casing and when working resonant frequency be generally the situation of relatively low frequency, the probability height that covibration occurs in low frequency.Cause
This is it is desirable to be avoided making blade 4 and the eigentone of the conjugant 10 of aluminium sheet 9 move to the direction of step-down.
In example shown in Fig. 1 (b), along boundary member (the hereinafter referred to as blade 4 of blade 4 and wheelboss part 5
Root 11) the exterior region 12 from blade 4 and hinder marginal part 13 the centrage 14 that passes through of centre position, in the radial direction of blade 4
Upper extended aluminium sheet 9.Thereby, it is possible to keep the stability of the rotation of the impeller 3 with conjugant 10.
As described above, aluminium sheet 9 is centered on the centrage 14 of blade 4, formed with the one fixed width narrower than blade 4, from leaf
The 11 radially extending settings in blade 4 of the root of piece 4 are to leading section 15.
That is, aluminium sheet 9 is from external diameter (such as more than the 100mm) identical of the spaced on center with wheelboss part 5 and wheelboss part 5
The position of distance is arranged for starting point, and be extended to the spaced on center with wheelboss part 5 and impeller 3 external diameter (for example
More than 200mm) identical distance position.By arranging to leading section 15 aluminium sheet 9 from the root 11 of blade 4, make conjugant
10 are difficult to reverse and not pliable, improve elastic constant K.
Additionally, by aluminium sheet 9 is arranged one fixed width centered on the centrage 14 of blade 4, conjugant can be suppressed
The increase of 10 weight M.Thereby, it is possible to improve eigentone f of conjugant 10.
In Fig. 1 (a), when impeller 3 rotates, the direction of ventilation of the wind being produced by impeller 3 becomes from the right side in Fig. 1 (a)
The direction in side to left side.Now, in the surface of blade 4 the wind pressure ratio upstream side suffered by the face in downstream of direction of ventilation face
Suffered blast is high.Therefore, if engaging aluminium sheet 9 in the face in the downstream of direction of ventilation, having that pressure oscillation is larger, making an uproar
The probability that sound increases.
By aluminium sheet 9 being engaged in the surface of the blade 4 of the upstream side of direction of ventilation, the increase of noise can be suppressed.
According to the axial flow blower 100 of embodiment 1, the intrinsic of conjugant 10 can be made by engaging blade 4 with aluminium sheet 9
Frequency of vibration f increases, and so that resonant frequency is changed in the scope inconsistent with operating frequency.Variable therefore, it is possible to suppress to carry out
The abnormal vibrations that covibration during speed operating causes and the generation of the excessive stress with this abnormal vibrations.Additionally, according to
The axial flow blower 100 of embodiment 1, can make the resonant frequency of conjugant 10 change, and suppress the increase of its weight.Therefore,
Can suppress in the rotation of impeller 3 blade 4 root 11 produce centrifugal force caused by stress increase and with should
The breakage of the blade 4 that stress increases.Therefore, it is possible to responding awareness of saving energy and obtaining high reliability.
(embodiment 2)
Hereinafter, the impeller of embodiment 2 is illustrated.Embodiment 2 is in the vpg connection changing aluminium sheet with embodiment 1 not
With the other basic structures with regard to impeller and axial flow blower are same as Example 1.Embodiment 3,4 is also same.
Represent the blade 24 of the impeller being arranged on embodiment 2 and the structure of the conjugant 20 of aluminium sheet 29 in Fig. 3.In addition, Fig. 3
Represent the structure of one of multiple conjugants 20 (blade 24) conjugant 20, Fig. 4,5 be also same.
The aluminium sheet 29 of embodiment 2 forms and obtains ratio blade 24 narrow width, along blade 24 centrage 21 from the root of blade 24
22 (boundary members of blade 24 and wheelboss part 25) length specifying in the radially extending setting of blade 24.That is, aluminium sheet
29 are arranged in the way of not reaching the leading section of blade 24.
By starting setting up aluminium sheet 29 from the root 22 of blade 24, conjugant 20 can be made to be difficult to reverse.Additionally, passing through
Aluminium sheet 29 is arranged in the way of being not up to the leading section of blade 24, the increase of weight M of conjugant 20 can be suppressed.
Have the embodiment 2 of the conjugant 20 shown in Fig. 3 axial flow blower can make the resonant frequency of conjugant 20 with
Change in the inconsistent scope of operating frequency, and can more effectively suppress the increase of weight M of conjugant 20.Accordingly, it is capable to
Enough suppression carry out the abnormal vibrations that covibration during variable-speed operation causes, and more efficiently prevent from when impeller rotates
The increase of the stress that the centrifugal force that the root 22 of blade 24 produces causes.
(embodiment 3)
Hereinafter, the impeller of embodiment 3 is illustrated.Represent blade 34 and the aluminum of the impeller being arranged on embodiment 3 in Fig. 4
The structure of the conjugant 30 of plate 39.
The aluminium sheet 39 of embodiment 3 is formed as with the exterior region 31 from blade 34 to the roughly the same width of the width of hinder marginal part 32
Degree, extremely advises from the root 33 (boundary member of blade 34 and wheelboss part 35) of blade 34 in the radially extending setting of blade 34
Fixed length.That is, aluminium sheet 39 is arranged in the way of not reaching the leading section of blade 34.
By starting setting up aluminium sheet 39 from the root 33 of blade 34, conjugant 30 can be made to be difficult to reverse.Additionally, passing through
Aluminium sheet 39 is formed as and the exterior region 31 from blade 34 to the roughly the same width of the width of hinder marginal part 32, for example, can make
During the thinner thickness of blade 34, it is adjusted using aluminium sheet 39 so that the intensity of conjugant 30 entirety does not decline.
(embodiment 4)
Hereinafter, the impeller of embodiment 4 is illustrated.Represent blade 44 and the aluminum of the impeller being arranged on embodiment 4 in Fig. 5
The structure of the conjugant 40 of plate 49.
In the rotation of impeller, in the region of exterior region 41 side of blade 44, in answering that the root 43 of blade 44 produces
Power becomes big.It is exterior region 41 side of blade 44 in the larger region of the stress of root 43 generation of blade 44 when impeller rotates
Region, the aluminium sheet 49 of embodiment 4 is diametrically extended the length of regulation from the root 43 of blade 44.That is, in embodiment 4
In, aluminium sheet 49 is arranged on exterior region 41 side of blade 44, and is not arranged in hinder marginal part 42 side of blade 44.
Thereby, it is possible to make conjugant 40 be difficult to reverse or not pliable, and it is capable of the lightweight of conjugant 40.Cause
This, it is possible to increase eigentone f of conjugant 40, suppression carries out the exception that covibration during variable-speed operation causes and shakes
Dynamic.Additionally, by the lightweight of conjugant 40, the stress producing in the root 43 of blade 44 when impeller rotates can be suppressed to increase
Greatly, and be prevented from the breakage of blade 44.
Impeller described above and axial flow blower for example can be preferred for vehicle-mounted purposes.Additionally, beyond vehicle-mounted purposes,
For example can also be used to the ventilation purposes of the equipment of factory etc..
The explanation of reference
1 motor
2 rotary shafts
3 impellers
4th, 24,34,44 blades (fin, blade)
5th, 25,35 wheelboss part
6 hub parts
7 packing rings (washer)
8 bolts
9th, 29,39,49 aluminium sheet
10th, 20,30,40 conjugant
11st, the root of 22,33,43 blades
12nd, the exterior region of 31,41 blades
13rd, the hinder marginal part of 32,42 blades
14th, the centrage of 21 blades
The leading section of 15 blades
100 axial flow blowers.
Claims (8)
1. a kind of impeller is it is characterised in that include：
It is set to radial multiple blade in the outer peripheral face of the wheelboss part of cup-shaped；With
The aluminium sheet locally arranging on the surface of described blade.
2. impeller as claimed in claim 1 it is characterised in that：
Described blade is made up of steel.
3. impeller as claimed in claim 1 it is characterised in that：
Described blade is welded in described wheelboss part.
4. impeller as claimed in claim 1 it is characterised in that：
Described aluminium sheet is along described blade and the boundary of described wheelboss part from the exterior region of this blade and hinder marginal part
Centrage that centre position is passed through, described blade radially extending setting.
5. impeller as claimed in claim 4 it is characterised in that：
Described aluminium sheet from described blade with the border of described wheelboss part described blade radially extending setting to institute
State the leading section of blade.
6. impeller as claimed in claim 1 it is characterised in that：
Described aluminium sheet described blade front edge side from described blade with the border of described wheelboss part in described blade
Radially extending setting.
7. impeller as claimed in claim 1 it is characterised in that：
Described aluminium sheet is arranged on the upstream of the direction of ventilation of wind produce in the surface of described blade by the rotation of this blade
The face of side.
8. a kind of axial flow blower is it is characterised in that include：
Impeller any one of claim 1～7；With
Described impeller is carried out with the motor of rotation driving.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-171437 | 2015-08-31 | ||
| JP2015171437A JP2017048704A (en) | 2015-08-31 | 2015-08-31 | Impeller and axial flow blower including the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106481597A true CN106481597A (en) | 2017-03-08 |
Family
ID=58238413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610451547.2A Pending CN106481597A (en) | 2015-08-31 | 2016-06-21 | Impeller and there is its axial flow blower |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2017048704A (en) |
| CN (1) | CN106481597A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6814667B2 (en) | 2017-03-14 | 2021-01-20 | 日本碍子株式会社 | Honeycomb structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04203296A (en) * | 1990-11-29 | 1992-07-23 | Hitachi Ltd | Blower |
| JP2000136797A (en) * | 1998-11-04 | 2000-05-16 | Matsushita Seiko Co Ltd | Blast impeller |
| JP2008014153A (en) * | 2006-07-03 | 2008-01-24 | Hitachi Industrial Equipment Systems Co Ltd | Axial flow blower |
| CN102003411A (en) * | 2010-12-24 | 2011-04-06 | 广东美的电器股份有限公司 | Axial-flow wind wheel |
| CN203532333U (en) * | 2012-12-27 | 2014-04-09 | 美蓓亚株式会社 | Air feeder |
| CN204041546U (en) * | 2013-10-31 | 2014-12-24 | 株式会社日立产机系统 | Impeller and the axial flow blower possessing it |
| JP2015001202A (en) * | 2013-06-17 | 2015-01-05 | ミネベア株式会社 | Blower fan |
-
2015
- 2015-08-31 JP JP2015171437A patent/JP2017048704A/en active Pending
-
2016
- 2016-06-21 CN CN201610451547.2A patent/CN106481597A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04203296A (en) * | 1990-11-29 | 1992-07-23 | Hitachi Ltd | Blower |
| JP2000136797A (en) * | 1998-11-04 | 2000-05-16 | Matsushita Seiko Co Ltd | Blast impeller |
| JP2008014153A (en) * | 2006-07-03 | 2008-01-24 | Hitachi Industrial Equipment Systems Co Ltd | Axial flow blower |
| CN102003411A (en) * | 2010-12-24 | 2011-04-06 | 广东美的电器股份有限公司 | Axial-flow wind wheel |
| CN203532333U (en) * | 2012-12-27 | 2014-04-09 | 美蓓亚株式会社 | Air feeder |
| JP2015001202A (en) * | 2013-06-17 | 2015-01-05 | ミネベア株式会社 | Blower fan |
| CN204041546U (en) * | 2013-10-31 | 2014-12-24 | 株式会社日立产机系统 | Impeller and the axial flow blower possessing it |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017048704A (en) | 2017-03-09 |
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Application publication date: 20170308 |