CN104747472A - A vortex fan - Google Patents
A vortex fan Download PDFInfo
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- CN104747472A CN104747472A CN201410822683.9A CN201410822683A CN104747472A CN 104747472 A CN104747472 A CN 104747472A CN 201410822683 A CN201410822683 A CN 201410822683A CN 104747472 A CN104747472 A CN 104747472A
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Abstract
A vortex fan capable of effectively inhibiting pressure changes of a tongue part particularly pressure changes of upper and lower surfaces and a tongue part of blades, and largely reducing nZ sound and high-frequency waves is provided. The vortex fan is provided with an impeller provided with blades at the outer periphery of a hub; a motor driving the impeller to rotate; and a shell. The shell comprises a cylindric part covering the hub; an annular air chamber connected to the inner wall of the cylindric part and covering the outer peripheral surface and upper and lower surfaces of the blades; an inhaling port connected to the air chamber; a discharging port connected to the air chamber at a position separated circumferentially of the inhaling port; and a tongue part separating the inhaling port and the discharging port. For the tongue part, the gap between the tongue part and the blades is the maximum at the angle of the tongue part where a side surface of a discharging port side of the tongue part and the inner wall of the cylindric part are crossed. The gap gradually narrows to the front end of a fan shape at a slope of the fan shape formed by adopting the angle as the center, and maintains at an inhaling port side from the front end.
Description
Technical field
The present invention relates to vortex flow fan.
Background technique
In the past, there will be a known vortex flow fan as blowing unit.As vortex flow fan, be configured to the housing in the roughly U-shaped with suction port and exhaust port, contain the impeller with multiple blade and the motor making vane rotary (such as with reference to patent documentation 1).
This vortex flow fan is configured to import air from suction port to enclosure interior and discharge from exhaust port, in the inside of housing, suction port and exhaust port are isolated by being called as the divider of tongue (isolation part), and the air entered in housing from suction port does not again turn back to suction port but flows to exhaust port.
Transmitted the air flow into from suction port in housing by the blade of the impeller correspondingly rotated with the driving of motor, and make its pressure increase thus flow to exhaust port.Now, if boosted air and tongue collide, then the pitch-synchronous ground of air and blade is by periodically and compress sharp, thus produces sound, its high frequency waves of frequency that represented by rotating speed × blade number, that be called as nZ sound.
In vortex flow fan, as the pressure oscillation that can suppress to be caused by compressing sharp by tongue ambient air, and reduce nZ sound and high frequency wave structure, the known Inlet cone angle bi-side at tongue are provided with the structure (such as with reference to patent documentation 1 and patent documentation 2) of fillet.
In addition, the known face opposed with impeller at partition wall (tongue), at least retain the end of suction port side, cut out the silencing groove broadened gradually from trend outlet mouth side, suction oral area side, or be provided with the structure (such as with reference to patent documentation 3) of the noise reduction projection narrowed gradually highlightedly.
Patent documentation 1: Japanese Unexamined Patent Publication 2008-190837 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2005-282578 publication
Patent documentation 3: Japanese Unexamined Patent Publication 62-116200 publication
But, as shown in patent documentation 1 and patent documentation 2, even if be provided with fillet in the Inlet cone angle bi-side of tongue, be also only that the pressure increase of surrounding atmosphere temporarily postpones, cannot avoid the pressure oscillation sharply in fillet terminal, the minimizing effect of nZ sound, high frequency waves is weak.
In addition, silencing groove according to patent documentation 3, noise reduction projection, although pressure oscillation sharply can be avoided between the outer circumferential face of face, the i.e. impeller opposed with impeller of partition wall (tongue) and partition wall (tongue), but because the upper and lower surface at blade produces the pressure oscillation sharply of air more strongly, therefore the minimizing effect of nZ sound, high frequency waves is weak.
Summary of the invention
Therefore, the present invention completes in view of above-mentioned problem, and object is to provide the pressure oscillation that can effectively suppress between the upper and lower surface of tongue, particularly blade and tongue, thus can reduce the vortex flow fan of nZ sound, high frequency waves significantly.
The present invention has following structure for achieving the above object.
(1) vortex flow fan of the present invention possesses: impeller, and it has blade in the periphery of wheel hub; Motor, it makes above-mentioned vane rotary; And housing, this housing is configured to comprise: cylindrical portion, and it covers above-mentioned wheel hub; Circular air chamber, it engages with the inwall of above-mentioned cylindrical portion, and covers outer circumference face and the upper and lower surface of above-mentioned blade; Suction port, it engages with above-mentioned air chamber; Exhaust port, it engages with above-mentioned air chamber in the position be circumferentially separated from above-mentioned suction port; And tongue, it is isolated between above-mentioned suction port and above-mentioned exhaust port.For above-mentioned tongue, at the angle place of the above-mentioned tongue that the side of above-mentioned exhaust port side of above-mentioned tongue intersects with the above-mentioned inwall of above-mentioned cylindrical portion, make the gap between above-mentioned tongue and above-mentioned blade maximum.Above-mentioned gap tends to above-mentioned fan-shaped front end owing to forming fan-shaped inclined-plane at above-mentioned tongue centered by above-mentioned angle and narrows, and keeps certain in the suction port side from above-mentioned front end.
(2) in the structure of above-mentioned (1), said motor is outer rotor motor, possesses: rotor shaft, and it is fixed on the center of above-mentioned wheel hub; And rotor magnet, it is installed on the inner peripheral surface of above-mentioned wheel hub via rotor yoke, above-mentioned wheel hub as above-mentioned outer rotor motor rotor case and use.
(3) in the structure of above-mentioned (2), possess: bearing case, above-mentioned rotor shaft supports as rotating by it; And stator, it has the winding of the periphery being configured at above-mentioned bearing case in the mode opposed with above-mentioned rotor magnet, forms motor part by above-mentioned rotor magnet and said stator.
According to the present invention, following vortex flow fan can be provided, namely effectively can suppress the pressure oscillation between the upper and lower surface of tongue, particularly blade and tongue, thus nZ sound, high frequency waves can be reduced significantly.
Accompanying drawing explanation
Fig. 1 is the stereogram of the basic comprising that vortex flow fan is shown.
Fig. 2 is the sectional view of the A-A line along Fig. 1.
Fig. 3 is the figure be described in detail for the tongue of the vortex flow fan to Fig. 1.
Fig. 4 is the figure be described the result of pressure oscillation simulation.
Fig. 5 is the figure be described in detail for the tongue of the vortex flow fan to mode of execution.
Fig. 6 is the sectional view of the B-B line along Fig. 5.
Fig. 7 is the plotted curve of the noise level measurement result of the vortex flow fan of reference configuration.
Fig. 8 is the plotted curve of the noise level measurement result of the vortex flow fan of research structure.
Fig. 9 is the plotted curve of static pressure-air quantity characteristic that reference configuration and research structure are shown.
Reference character
1 ... vortex flow fan; 10 ... housing; 11 ... suction port; 12 ... exhaust port; 13 ... cylindrical portion; 14 ... air chamber; 15 ... tongue; 15a ... upside tongue; 15b ... downside tongue; 15c ... outer circumferential side tongue; 15d ... stepped surface; 15e ... bight; 15f ... inclined-plane; 15h ... side; 16 ... chimeric cylinder portion; 20 ... impeller; 21 ... wheel hub; 23 ... blade; 24 ... blade; 30 ... outer rotor motor; 31 ... bearing case; 32 ... stator; 33 ... rotor; 34 ... bearing; 35 ... stator iron core; 36 ... insulator; 37 ... coil; 38 ... rotor yoke; 39 ... rotor magnet; 40 ... rotor shaft; 100 ... vortex flow fan.
Embodiment
Below, after the vortex flow fan as basic comprising of the present invention being described with reference to accompanying drawing, suitable mode of execution is described.In addition, mark identical reference character to identical element to be in the whole text described.
[vortex flow fan]
Fig. 1 is the stereogram of the basic comprising that vortex flow fan is shown, Fig. 2 is the sectional view of the A-A line along Fig. 1.
As shown in Figure 2, vortex flow fan 1 is configured to possess housing 10, impeller 20 and outer rotor motor 30.
As shown in Figure 2, possess: cylindric wheel hub 21, its rotor case as outer rotor motor 30 plays function impeller 20 integrality; Divider 22, it extends laterally near the central authorities of the above-below direction of the periphery of wheel hub 21; And multiple blades 23,24 of formation are given prominence in the upper and lower surface of divider 22.In addition, although not shown, divider 22 from or lower observation to overlook under line of vision as discoid, be circumferentially integrally formed multiple blade 23,24 in its discoid upper and lower surface.
In following record, as required, the blade 23 upper surface at divider 22 being given prominence to formation is called upper blade 23, and the blade 24 lower surface at divider 22 being given prominence to formation is called lower blade 24.
In addition, multiple blade 23,24 extends from the peripheral part of wheel hub 21 to radiation direction, forms the space of the channel-shaped for air inflow between adjacent blade 23 and between adjacent blade 24.
In addition, although not shown, blade 23,24 extends from the peripheral part of wheel hub 21 along radiation direction in the mode that forward end is bending to sense of rotation downstream side, but also can for the blade shape linearly extended, and sometimes also can extend in the mode of upstream lateral bend.
As shown in Figure 2, housing 10 has: cylindrical portion 13, and it is formed in central part in the mode covering wheel hub 21; And circular part, it engages with the periphery of cylindrical portion 13 and covers upper and lower surface and the outer circumferential face of multiple blade 23,24, and this circular part forms air chamber 14.
In addition, as shown in Figure 1, housing 10 has: the suction port 11 engaged with circular air chamber 14; And exhaust port 12, it engages with circular air chamber 14 in the position be circumferentially separated from suction port 11, has tongue 15 between suction port 11 and exhaust port 12.
This tongue 15 is sucked from suction port 11 by the rotation of the impeller 20 in housing 10 for preventing, through being in the air chamber 14 of the periphery of housing 10, the air that flows to exhaust port 12 side turns back to suction port 11 side again, is configured to make the internal face of circular air chamber 14 near blade 23,24 thus gap is reduced.
Therefore, the air arriving exhaust port 12 cannot turn back to suction port 11 side by the tongue 15 little through gap, thus can be discharged from exhaust port 12 efficiently.
Like this, the air flow path between exhaust port 12 and suction port 11 is separated by tongue 15, makes air not flow into suction port 11 from exhaust port 12.
In addition, the circular air chamber 14 from the suction port 11 of housing 10 to exhaust port 12 becomes roughly U-shaped (with reference to Fig. 1).
As shown in Figure 2, outer rotor motor 30 possesses: bearing case 31; Stator 32, it is fixed on the peripheral part of bearing case 31; Rotor 33, it comprises and is configured to the rotor magnet 39 opposed with the peripheral part of stator 32.
Bearing case 31 is the parts being provided with the cylindrical shape of upper and lower pair of bearings 34 in inner peripheral portion, is straightened by being fitted together to the chimeric cylinder portion 16 of the bottom being formed at housing 10 the center of inside position being arranged at housing 10.
Stator 32 is configured to be possessed: stator iron core 35, and it is fixed on the peripheral part of bearing case 31; Insulator 36, it is arranged at the coil winding portion of stator iron core 35; And multiple coil (winding) 37, they via insulator 36 package in stator iron core 35.
Rotor 33 possesses: rotor yoke 38, and it is arranged at the inner side of wheel hub 21 integratedly; Multiple or single rotor magnet 39, it is circumferentially installed on the inner peripheral portion of rotor yoke 38; And rotor shaft 40, it is fixed on the center of wheel hub 21 or rotor yoke 38.This rotor shaft 40 is supported on bearing case 31 via bearing 34, and rotor 33 is configured to rotate centered by rotor shaft 40 thus.
And outer rotor motor 30 makes to rotate with the impeller 20 of rotor 33 one by supplying electric current successively from power supply unit (not shown) to multiple coil 37 opportunity in regulation, thus forms the vortex flow fan 1 of so-called external rotor type.
Next the tongue structure of housing 10 is described.
[tongue structure]
As mentioned above, the tongue 15 of housing 10 is, does not again turn back to suction port 11 but the part flowing to exhaust port 12 and isolate between suction port 11 and exhaust port 12 to make the air entered in housing 10 from suction port 11.
Specifically, as shown in Figure 2, tongue 15 is configured to be possessed: upside tongue 15a, and it makes the upper end of upper blade 23 and the gap turn narrow of housing 10; Downside tongue 15b, it makes the lower end of lower blade 24 and the gap turn narrow of housing 10; And outer circumferential side tongue 15c, it makes the outer circumference end of blade 23,24 and the gap turn narrow of housing 10.
In addition, as mentioned above, tongue 15 is not as air chamber 14, allow the part that there is gap between blade 23,24, but is formed as the part that makes internal face near blade 23,24 as far as possible.
Therefore, the upper lower wall surface of tongue 15, to be in the mode of the position near blade 23,24 than the upper lower wall surface of air chamber 14, is configured to give prominence to the inside than the upper lower wall surface of air chamber 14.
Therefore, the boundary part that the air chamber 14 shown in Fig. 3 connects with tongue 15, namely the side of exhaust port 12 side of tongue 15 is formed with ladder difference, studies as follows the stepped surface 15d that the side in this exhaust port 12 side is formed.
For vortex flow fan 1, under the state that impeller 20 and the driving of outer rotor motor 30 correspondingly rotate, the air flow in housing 10 from suction port 11 is boosted by transmission by impeller 20, and flows to exhaust port 12.
Now, air repeatedly carries out the front end release from blade 23,24 and turns back to the flowing of root.The air of air-flow owing to being the inner side being positioned at impeller 20 of root neighbouring (wheel hub 21 side), so be in the position away from exhaust port 12, is difficult to discharge from exhaust port 12 efficiently.
Therefore, think that such air flows to suction port 11 side along with the rotation of impeller 20 with keeping intact.
But, as mentioned above, because the side of exhaust port 12 side at tongue 15 exists stepped surface 15d outstanding to the inside, therefore think that the air that will flow to suction port 11 side and this stepped surface 15d collide.
The pitch-synchronous ground of the collision of this air and blade 23,24, periodically to occur, and, not think it is singly collision, be also subject to compression sharply simultaneously, therefore think the sound being called as the frequency of nZ sound, its high frequency waves of producing and being represented by rotating speed × blade number.
Therefore, in order to confirm that above-mentioned phenomenon has carried out pressure oscillation simulation.
The result obtained in the simulation of pressure oscillation is shown Fig. 4 easy understand.
As shown in Figure 4, specify known, pressure oscillation tongue 15, maximum near the root of the blade 23,24 at the stepped surface 15d place of the side of exhaust port 12 side, on the other hand, because the air near the front end of blade 23,24 is discharged by exhaust port 12, therefore pressure variance is little.
Therefore, whether the present application person can by increasing to reduce ladder difference by the gap of the blade 23,24 of part large for the pressure oscillation of the tongue 15 of vortex flow fan 1 and tongue 15 (upside tongue 15a, downside tongue 15b) if expecting, and start from here gap is narrowed gradually, suppress the rising sharply of pressure, the sound of frequency that this stepped surface 15d can be suppressed thus, that be called as nZ sound, the generation of its high frequency waves.
Namely, be described with reference to Fig. 2, when tongue 15 being divided into the upside tongue 15a opposed with the upper and lower surface of blade 23,24 and downside tongue 15b, the outer circumferential side tongue 15c opposed with the front-end face of blade 23,24, because pressure oscillation is little between blade 23,24 and outer circumferential side tongue 15c, therefore maintain certain gap.
On the other hand, for between blade 23,24 and upside tongue 15a and downside tongue 15b, as shown in Figure 3, at the stepped surface 15d of the side of exhaust port 12 side of tongue 15, because the bight 15e pressure oscillation near the root of blade 23,24 is maximum, therefore make the gap of this part and blade 23,24 become and reduce ladder difference greatly, along with the forward end near suction port 11 side and blade 23,24, gap is diminished gradually, make pressure increase gradually thus.Expect the pressure oscillation that whether can suppress like this to produce with pressure increase sharply, the generation of nZ sound, high frequency waves is reduced.
Below, be described in detail with reference to the tongue structure of Fig. 5 and Fig. 6 to the present embodiment based on above-mentioned idea.
Wherein, Fig. 6 illustrates the section of Fig. 5, in order to the structure of the tongue 15 making above-mentioned explanation is easier to understand, this section is not the rectilinear profiles by tongue 15, but makes the middle part choosing section be divided into the B-B line sectional view choosing section in the mode of the O-A-B-O ' by Fig. 5.
As shown in Figure 5, for the tongue 15 of the vortex flow fan 100 of present embodiment, at the bight 15e that the side 15h of exhaust port 12 side of tongue 15 intersects with the inwall of the cylindrical portion 13 of housing 10, as shown in Figure 6, the gap between tongue 15 and blade 23,24 is maximum.
In addition, as shown in Figure 5, this gap is formed as fan-shaped at tongue 15 and forms inclined-plane 15f on its surface centered by the 15e of bight, and the front end tending to fan-shaped thus narrows gradually, and as can be seen from Figure 6, suction port 11 side from its front end keeps certain.
The tongue 15 of present embodiment, shape, as shown in Figure 5, be formed as with a part for cylindrical portion 13 as approximate trapezoid on one side, at the bight 15e of exhaust port 12 side on one side of cylindrical portion 13, make tongue 15 maximum with the gap of blade 23,24, and, make the fan-shaped inclined-plane 15f centered by the 15e of bight be formed at tongue 15 (upside tongue 15a, downside tongue 15b (with reference to Fig. 6)), become the shape of the gap smaller at fan-shaped forward end and blade 23,24.
In order to confirm the effect that the shape of tongue 15 as described above is brought, present embodiment structure (hereinafter referred to as " research structure ") and use Fig. 1 ~ 4 to be described the structure (hereinafter referred to as " reference configuration ") of basic comprising in, make the rotating speed of impeller be 5900rpm, implement noise level measurement in the position apart from suction port 1m.
Fig. 7, Fig. 8 illustrate the above results.Fig. 7 is the measurement result of reference configuration, and Fig. 8 is the measurement result of research structure.
From these results, the nZ composition of the about 30dBA near the 4.5kHz observed in reference configuration is not confirmed in research structure, therefore, it is possible to obtain good result.
In addition, Fig. 9 illustrates the P-Q characteristic (static pressure-air quantity characteristic) of research structure when making rotating speed identical and reference configuration, the P-Q characteristic of research structure obtains the characteristic roughly the same with the P-Q characteristic of reference configuration, thus, the problems such as research structure nonexistence can worsen can be confirmed, achieve the minimizing of nZ composition.
According to the vortex flow fan 100 of above-mentioned mode of execution, as shown in Figure 6, possess: impeller 20, it has blade 23,24 in the periphery of wheel hub 21; Outer rotor motor 30, it makes impeller 20 rotate; And housing 10.Above-mentioned housing 10 is configured to comprise: cylindrical portion 13, and it covers wheel hub 21; Circular air chamber 14, it engages with the periphery of cylindrical portion 13, and covers outer circumference face and the upper and lower surface of blade 23,24; Suction port 11, it engages with air chamber 14; Exhaust port 12, it engages with air chamber 14 in the position be circumferentially separated from suction port 11; And tongue 15, it is isolated between suction port 11 and exhaust port 12.As shown in Figure 5, tongue 15 makes the gap between tongue 15 and blade 23,24 maximum at the bight 15e of the tongue 15 that the side 15h of exhaust port 12 side of tongue 15 intersects with the inwall of cylindrical portion 13, this gap forms fan-shaped inclined-plane 15f at tongue 15 centered by the 15e of bight, tend to fan-shaped front end thus and narrow, and keep certain in suction port 11 side from front end, thus effectively can suppress the pressure oscillation of tongue 15, the particularly upper and lower surface of blade 23,24, can significantly reduce nZ sound, high frequency waves.
In addition, for the vortex flow fan 100 of present embodiment, as shown in Figure 6, motor is outer rotor motor 30, the rotor magnet 39 of the rotor shaft 40 possessing the center being fixed on wheel hub 21 and the inner peripheral surface being installed on wheel hub 21 via rotor yoke 38, and wheel hub 21 uses as the rotor case of outer rotor motor 30, therefore, for impeller 20, and arranging to make above-mentioned impeller 20 rotate compared with the situation of outer rotor motor in addition, the structure of outer rotor motor can be formed compactly.
In addition, for the vortex flow fan 100 of present embodiment, as shown in Figure 6, possess: bearing case 31 and the stator 32 that can be supported on rotor shaft 40 rotatably, this stator 32 has the coil 37 being configured at the periphery of bearing case 31 in the mode opposed with rotor magnet 39, rotor magnet 39 and stator 32 is utilized to form outer rotor motor 30, therefore, it is possible to form the vortex flow fan 100 being accommodated with motor part compactly.
Above, be preferred embodiment described in detail of the present invention, but the present invention is not limited to above-mentioned mode of execution, in the scope of the main idea of the present invention described in claims, can various distortion, change be carried out.
Claims (3)
1. a vortex flow fan, is characterized in that,
Possess:
Impeller, it has blade in the periphery of wheel hub;
Motor, it makes above-mentioned vane rotary; And
Housing, this housing is configured to comprise: cylindrical portion, and it covers above-mentioned wheel hub; Circular air chamber, it engages with the inwall of above-mentioned cylindrical portion, and covers outer circumference face and the upper and lower surface of above-mentioned blade; Suction port, it engages with above-mentioned air chamber; Exhaust port, it engages with above-mentioned air chamber in the position be circumferentially separated from above-mentioned suction port; And tongue, it is isolated between above-mentioned suction port and above-mentioned exhaust port,
For above-mentioned tongue, angle place that intersect with the above-mentioned inwall of above-mentioned cylindrical portion in the side of above-mentioned exhaust port side of above-mentioned tongue, above-mentioned tongue, makes the gap between above-mentioned tongue and above-mentioned blade maximum,
Above-mentioned gap tends to above-mentioned fan-shaped front end owing to forming fan-shaped inclined-plane at above-mentioned tongue centered by above-mentioned angle and narrows, and keeps certain in the suction port side from above-mentioned front end.
2. vortex flow fan according to claim 1, is characterized in that,
Said motor is outer rotor motor, possesses:
Rotor shaft, it is fixed on the center of above-mentioned wheel hub; And
Rotor magnet, it is installed on the inner peripheral surface of above-mentioned wheel hub via rotor yoke,
Above-mentioned wheel hub as above-mentioned outer rotor motor rotor case and use.
3. vortex flow fan according to claim 2, is characterized in that,
Possess:
Bearing case, above-mentioned rotor shaft supports as rotating by it; And
Stator, it has the winding of the periphery being configured at above-mentioned bearing case in the mode opposed with above-mentioned rotor magnet,
Motor part is formed by above-mentioned rotor magnet and said stator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013271046A JP6077991B2 (en) | 2013-12-27 | 2013-12-27 | Whirlpool fan |
| JP2013-271046 | 2013-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104747472A true CN104747472A (en) | 2015-07-01 |
| CN104747472B CN104747472B (en) | 2018-04-27 |
Family
ID=53535605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410822683.9A Expired - Fee Related CN104747472B (en) | 2013-12-27 | 2014-12-25 | Vortex flow fan |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6077991B2 (en) |
| CN (1) | CN104747472B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020029838A (en) | 2018-08-24 | 2020-02-27 | 日本電産株式会社 | Blower module and air conditioning device for automobile |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735197A (en) * | 1980-08-12 | 1982-02-25 | Matsushita Electric Ind Co Ltd | Vortex flow fan |
| JPS62116200U (en) * | 1986-01-14 | 1987-07-23 | ||
| CN1955487A (en) * | 2001-08-20 | 2007-05-02 | 松下电器产业株式会社 | Vortex flow fan |
| JP4349327B2 (en) * | 2005-05-25 | 2009-10-21 | パナソニック株式会社 | Whirlpool fan |
| CN102297157A (en) * | 2010-06-25 | 2011-12-28 | 山洋电气株式会社 | Centrifugal fan |
| JP5082478B2 (en) * | 2007-02-08 | 2012-11-28 | パナソニック株式会社 | Air conditioner |
| JP5292110B2 (en) * | 2009-01-08 | 2013-09-18 | 株式会社日立産機システム | Vortex blower |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4995213A (en) * | 1973-01-16 | 1974-09-10 |
-
2013
- 2013-12-27 JP JP2013271046A patent/JP6077991B2/en not_active Expired - Fee Related
-
2014
- 2014-12-25 CN CN201410822683.9A patent/CN104747472B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735197A (en) * | 1980-08-12 | 1982-02-25 | Matsushita Electric Ind Co Ltd | Vortex flow fan |
| JPS62116200U (en) * | 1986-01-14 | 1987-07-23 | ||
| CN1955487A (en) * | 2001-08-20 | 2007-05-02 | 松下电器产业株式会社 | Vortex flow fan |
| JP4349327B2 (en) * | 2005-05-25 | 2009-10-21 | パナソニック株式会社 | Whirlpool fan |
| JP5082478B2 (en) * | 2007-02-08 | 2012-11-28 | パナソニック株式会社 | Air conditioner |
| JP5292110B2 (en) * | 2009-01-08 | 2013-09-18 | 株式会社日立産機システム | Vortex blower |
| CN102297157A (en) * | 2010-06-25 | 2011-12-28 | 山洋电气株式会社 | Centrifugal fan |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015124735A (en) | 2015-07-06 |
| CN104747472B (en) | 2018-04-27 |
| JP6077991B2 (en) | 2017-02-08 |
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