CN104747472B - Vortex flow fan - Google Patents

Abstract

The present invention, which provides, can effectively suppress tongue, the pressure oscillation particularly between the upper and lower surface of blade and tongue, and the vortex flow fan of nZ sounds, high frequency waves can be greatly reduced.The vortex flow fan of the present invention possesses：Impeller, has blade in the periphery of wheel hub；Motor, rotates impeller；And housing.The housing includes：Cylindrical portion, covers wheel hub；Circular gas chamber, engages with the inner wall of cylindrical portion, and covers outer circumference face and the upper and lower surface of blade；Suction inlet, engages with gas chamber；Outlet, engages from the position that suction inlet is circumferentially separated with gas chamber；And tongue, it will isolate between suction inlet and outlet.For tongue, at the angle for the tongue that the side of outlet side of tongue is intersected with the inner wall of cylindrical portion, make the gap between tongue and blade maximum.Gap is tended to the front end of sector and narrowed due to being formed the inclined-plane of sector centered on above-mentioned angle in tongue, and keeps certain in the suction inlet side from front end.

Description

Vortex flow fan

Technical field

The present invention relates to vortex flow fan.

Background technology

In the past, as there is vortex flow fan known to blowing unit.As vortex flow fan, it is configured to suction inlet and discharge The housing of the substantially U-shaped of mouth, contains the impeller with multiple blades and makes the rotating motor of impeller (referring for example to special Sharp document 1).

This vortex flow fan is configured to import air from suction inlet to enclosure interior and is discharged from outlet, in housing Portion, suction inlet are isolated with outlet by being referred to as the separator of tongue (isolation part), are entered from suction inlet in housing Air does not again return to suction inlet but flows to outlet.

The sky being flowed into from suction inlet in housing is transmitted by the blade of the correspondingly rotating impeller of the driving with motor Gas, and its pressure is increased so as to flow to outlet.At this time, if the air being boosted and tongue collide, air and blade Compressed periodically and sharp, so as to produce frequency being represented by rotating speed × blade number, being referred to as nZ sounds pitch-synchronous The sound of rate, its high frequency waves.

In vortex flow fan, become as the pressure as caused by sharp compressing the air around tongue can be suppressed It is dynamic, and reduce the structure of nZ sounds and high frequency waves, it is known that the structure of fillet is equipped with the inlet angle two sides of tongue (referring for example to special Sharp document 1 and patent document 2).

Additionally, it is known that in the face opposed with impeller of partition wall (tongue), at least retain the end of suction inlet side, cut out from Suction oral area side tends to the silencing groove that outlet mouth side gradually broadens, or is highlightedly equipped with the knot of the noise reduction projection become narrow gradually Structure (referring for example to patent document 3).

Patent document 1：Japanese Unexamined Patent Publication 2008-190837 publications

Patent document 2：Japanese Unexamined Patent Publication 2005-282578 publications

Patent document 3：Japanese Unexamined Patent Publication 62-116200 publications

However, as shown in patent document 1 and patent document 2, fillet is equipped with even in the inlet angle two sides of tongue, Only be surrounding air pressure rise temporarily postpone, the pressure oscillation drastically in fillet terminal, nZ sounds, high frequency can not be avoided The minimizing effect of ripple is weak.

In addition, silencing groove, noise reduction projection according to patent document 3, although can partition wall (tongue) and leaf The pressure oscillation avoided between opposed face, the i.e. outer circumferential surface of impeller and partition wall (tongue) drastically is taken turns, but due in blade Upper and lower surface more strongly produces the pressure oscillation drastically of air, therefore the minimizing effect of nZ sounds, high frequency waves is weak.

The content of the invention

Therefore, the present invention in view of the above subject and complete, it is therefore an objective to offer can effectively inhibit tongue, particularly Pressure oscillation between the upper and lower surface and tongue of blade, so as to significantly reduce the vortex flow fan of nZ sounds, high frequency waves.

The present invention is to achieve the above object and with lower structure.

(1) vortex flow fan of the invention possesses：Impeller, it has blade in the periphery of wheel hub；Motor, it makes above-mentioned impeller Rotation；And housing, the housing are configured to include：Cylindrical portion, it covers above-mentioned wheel hub；Circular gas chamber, its with it is above-mentioned The inner wall engagement of cylindrical portion, and cover outer circumference face and the upper and lower surface of above-mentioned blade；Suction inlet, itself and above-mentioned gas chamber Engagement；Outlet, it is engaged from the position that above-mentioned suction inlet is circumferentially separated with above-mentioned gas chamber；And tongue, it will be above-mentioned Isolate between suction inlet and above-mentioned outlet.For above-mentioned tongue, the side of the above-mentioned outlet side of above-mentioned tongue with At the angle for the above-mentioned tongue that the above-mentioned inner wall of above-mentioned cylindrical portion is intersected, make gap between above-mentioned tongue and above-mentioned blade most Greatly.Above-mentioned gap is tended to above-mentioned fan-shaped front end and become due to being formed the inclined-plane of sector centered on above-mentioned angle in above-mentioned tongue It is narrow, and keep certain in the suction inlet side from above-mentioned front end.

(2) in the structure of above-mentioned (1), said motor is outer rotor motor, is possessed：Armature spindle, it is fixed on above-mentioned The center of wheel hub；And rotor magnet, it is installed on the inner peripheral surface of above-mentioned wheel hub via rotor yoke, and above-mentioned wheel hub is as above-mentioned outer The rotor case of rotor type motor and use.

(3) in the structure of above-mentioned (2), possess：Bearing case, above-mentioned rotor e axle supporting is to rotate by it；And Stator, it has the winding for the periphery that above-mentioned bearing case is configured in a manner of opposed with above-mentioned rotor magnet, by above-mentioned turn Sub- magnet and said stator form motor part.

In accordance with the invention it is possible to provide following vortex flow fan, tongue can be effectively inhibited, particularly blade is upper Pressure oscillation between lower surface and tongue, so as to significantly reduce nZ sounds, high frequency waves.

Brief description of the drawings

Fig. 1 is the stereogram formed substantially for showing vortex flow fan.

Fig. 2 is the sectional view along the line A-A of Fig. 1.

Fig. 3 is the figure being described in detail for the tongue of the vortex flow fan to Fig. 1.

Fig. 4 is the figure illustrated to the result of pressure oscillation simulation.

Fig. 5 is the figure being described in detail for the tongue of the vortex flow fan to embodiment.

Fig. 6 is the sectional view along the line B-B of Fig. 5.

Fig. 7 is the curve map of the noise level measurement result of the vortex flow fan of reference configuration.

Fig. 8 is the curve map of the noise level measurement result of the vortex flow fan of research structure.

Fig. 9 is the curve map for the static pressure-air quantity characteristic for showing reference configuration and research structure.

Reference numeral

1 ... vortex flow fan；10 ... housings；11 ... suction inlets；12 ... outlets；13 ... cylindrical portions；14 ... gas chambers；15… Tongue；15a ... upsides tongue；15b ... downsides tongue；15c ... outer circumferential side tongues；15d ... stepped surfaces；15e ... corners； 15f ... inclined-planes；15h ... sides；16 ... fitting cylinder sections；20 ... impellers；21 ... wheel hubs；23 ... blades；24 ... blades；30 ... outer turns Type motors；31 ... bearing cases；32 ... stators；33 ... rotors；34 ... bearings；35 ... stator cores；36 ... insulators；37… Coil；38 ... rotor yokes；39 ... rotor magnets；40 ... armature spindles；100 ... vortex flow fans.

Embodiment

Hereinafter, referring to the drawings to as the present invention the vortex flow fan formed substantially illustrate after, to appropriate implementation Mode illustrates.Illustrated in addition, marking identical reference numeral to identical element in the whole text.

[vortex flow fan]

Fig. 1 is the stereogram formed substantially for showing vortex flow fan, and Fig. 2 is the sectional view along the line A-A of Fig. 1.

As shown in Fig. 2, vortex flow fan 1 is configured to possess housing 10, impeller 20 and outer rotor motor 30.

As shown in Fig. 2, 20 integraty of impeller possess：Cylindric wheel hub 21, it turns as outer rotor motor 30 Subshell plays function；Separator 22, it nearby extends laterally from the center of the above-below direction of the periphery of wheel hub 21；And The upper and lower surface of separator 22 protrudes the multiple blades 23,24 to be formed.In addition, although not shown, separator 22 is seen from up or down It is discoid under the vertical view line of vision examined, multiple blades 23,24 is circumferentially integrally formed in its discoid upper and lower surface.

In following record, as needed, the blade 23 to be formed will be protruded in the upper surface of separator 22 and is known as leaf Piece 23, the blade 24 to be formed will be protruded in the lower surface of separator 22 and is known as lower blade 24.

In addition, multiple blades 23,24 extend from the peripheral part of wheel hub 21 to radiation direction, between adjacent blade 23, with And the space of the channel-shaped flowed into for air is formed between adjacent blade 24.

In addition, although not shown, blade 23,24 is from the peripheral part of wheel hub 21 along radiation direction with front under direction of rotation The mode of trip lateral bend extends, but can also be the blade shape that linearly extends, sometimes can also be to bend to the upstream side Mode extend.

As shown in Fig. 2, housing 10 has：Cylindrical portion 13, it is formed in central portion in a manner of covering wheel hub 21；And Circular part, it engages with the periphery of cylindrical portion 13 and covers the upper and lower surface and outer circumferential surface of multiple blades 23,24, The circular part forms gas chamber 14.

In addition, as shown in Figure 1, housing 10 has：The suction inlet 11 engaged with circular gas chamber 14；And outlet 12, it is engaged from the position that suction inlet 11 is circumferentially separated with circular gas chamber 14, suction inlet 11 and outlet 12 it Between there is tongue 15.

The tongue 15 is used to prevent that the rotation by the impeller 20 in housing 10 from sucking from suction inlet 11, by housing The gas chamber 14 of 10 periphery and the air that flows to 12 side of outlet again returns to 11 side of suction inlet, be configured to the gas for making annular shape The internal face of room 14 is close to blade 23,24 so that gap is reduced.

Therefore, the air of arrival outlet 12 cannot pass through the small tongue 15 in gap and return to 11 side of suction inlet, so as to It is enough efficiently to be discharged from outlet 12.

In this way, tongue 15 separates the air flow circuit between outlet 12 and suction inlet 11 so that air is not from outlet 12 flow into suction inlet 11.

In addition, the circular gas chamber 14 from the suction inlet 11 of housing 10 to outlet 12 becomes substantially U-shaped (reference Fig. 1).

As shown in Fig. 2, outer rotor motor 30 possesses：Bearing case 31；Stator 32, it is fixed on the outer of bearing case 31 Circumference；Rotor 33, it includes be configured to the rotor magnet 39 opposed with the peripheral part of stator 32.

Bearing case 31 is the cylindric component that upper and lower a pair of bearings 34 is provided with inner peripheral portion, by with being formed at shell The fitting cylinder section 16 of the bottom of body 10 is chimeric and is straightened the center of inside position for being arranged at housing 10.

Stator 32 is configured to possess：Stator core 35, it is fixed on the peripheral part of bearing case 31；Insulator 36, it sets It is placed in the coil winding portion of stator core 35；And multiple coils (winding) 37, they are wrapped in stator iron via insulator 36 Core 35.

Rotor 33 possesses：Rotor yoke 38, it is integrally provided to the inner side of wheel hub 21；Multiple or single rotor magnet 39, it is circumferentially installed on the inner peripheral portion of rotor yoke 38；And armature spindle 40, it is fixed in wheel hub 21 or rotor yoke 38 The heart.The armature spindle 40 is supported on bearing case 31 via bearing 34, and thus rotor 33 is configured to revolve centered on armature spindle 40 Turn.

Moreover, outer rotor motor 30 by supplying successively on defined opportunity from power supply unit (not shown) to multiple coils 37 The impeller 20 with the one of rotor 33 is rotated to electric current, so as to form the vortex flow fan 1 of so-called outer-rotor type.

Next the tongue structure of housing 10 is illustrated.

[tongue structure]

As described above, the tongue 15 of housing 10 is, in order to make to enter air in housing 10 not again from suction inlet 11 Back to suction inlet 11 but flow to outlet 12 and isolate the part between suction inlet 11 and outlet 12.

Specifically, as shown in Fig. 2, tongue 15 is configured to possess：Upside tongue 15a, its make the upper end of blade 23 with The gap turn narrow of housing 10；Downside tongue 15b, it makes the lower end of lower blade 24 with the gap turn narrow of housing 10；And outer circumferential side Tongue 15c, it makes the outer circumference end of blade 23,24 with the gap turn narrow of housing 10.

In addition, as described above, tongue 15 is not to allow between blade 23,24 that there are the portion in gap as gas chamber 14 Point, and it is created as making as far as possible internal face close to the part of blade 23,24.

Therefore, the upper lower wall surface of tongue 15 with than the upper lower wall surface of gas chamber 14 be in close to blade 23,24 position side Formula, is configured to protrude inwardly than the upper lower wall surface of gas chamber 14.

Therefore, the side of 12 side of outlet of the boundary member to connect in the gas chamber 14 shown in Fig. 3 with tongue 15, i.e. tongue 15 Face is formed with step difference, to being studied as follows in the stepped surface 15d of the side of 12 side of outlet formation.

For vortex flow fan 1, in the state of the driving of impeller 20 and outer rotor motor 30 correspondingly rotates, from suction The air that entrance 11 is flowed into housing 10 is boosted by impeller 20 by transmission, and flows to outlet 12.

At this time, air is repeated from the release of the front end of blade 23,24 and returns to the flowing of root.Nearby (take turns root 21 side of hub) air-flow by being then situated on the air of the inner side of impeller 20, so in the position away from outlet 12, it is difficult to efficiently Discharged from outlet 12 on ground.

It is therefore contemplated that such air flows to 11 side of suction inlet with keeping intact with the rotation of impeller 20.

However, as noted previously, as there is the stepped surface protruded inwardly in the side of 12 side of outlet of tongue 15 15d, it is taken as that air and the stepped surface 15d collisions of 11 side of suction inlet will be flowed to.

The collision of the air with the pitch-synchronous of blade 23,24, periodically occur, and, it is believed that be not singly collision, Also it is subject to compression drastically at the same time, it is taken as that the sound for the frequency for being referred to as nZ sounds that generation is represented by rotating speed × blade number, Its high frequency waves.

Therefore, pressure oscillation simulation has been carried out in order to confirm above-mentioned phenomenon.

Fig. 4 shows the result obtained in the simulation of pressure oscillation with being readily appreciated that.

As shown in figure 4, being clear that, pressure oscillation is at the stepped surface 15d of tongue 15,12 side of outlet side Blade 23,24 root it is greatest around, on the other hand, since the air near the front end of blade 23,24 is by outlet 12 Discharge, therefore pressure variance is small.

Therefore, whether expect can be by big by the pressure oscillation of the tongue 15 of vortex flow fan 1 by the present application person The gap of partial blade 23,24 and tongue 15 (upside tongue 15a, downside tongue 15b) increases to reduce step difference, and from this Place starts to become narrow gradually gap, to suppress the rising drastically of pressure, thus, it is possible to suppress stepped surface 15d, claimed For the generation of the sound, its high frequency waves of the frequency of nZ sounds.

That is, illustrated with reference to Fig. 2, tongue 15 is being divided into the upside tongue opposed with the upper and lower surface of blade 23,24 In the case of portion 15a and downside tongue 15b, the outer circumferential side tongue 15c opposed with the front end face of blade 23,24, due in leaf Pressure oscillation is small between piece 23,24 and outer circumferential side tongue 15c, therefore maintains certain gap.

On the other hand, between blade 23,24 and upside tongue 15a and downside tongue 15b, as shown in figure 3, in tongue The stepped surface 15d of the side of 12 side of outlet in portion 15, since the corner 15e pressure near the root of blade 23,24 becomes Dynamic maximum, therefore the part and the gap of blade 23,24 is become larger to reduce step difference, with close to 11 side of suction inlet and leaf The front of piece 23,24 and taper into gap, be thus gradually increasing pressure.Expect so whether can suppressing adjoint The pressure oscillation that pressure drastically rises and produces, reduces the generation of nZ sounds, high frequency waves.

Hereinafter, the tongue structure of the present embodiment based on above-mentioned idea is carried out in more detail with reference to Fig. 5 and Fig. 6 It is bright.

Wherein, Fig. 6 shows the section of Fig. 5, and in order to be easier to understand the structure of the tongue 15 of described above, the section is not It is by the rectilinear profiles of tongue 15, but makes the midway portion of selection section to be selected in a manner of the O-A-B-O ' by Fig. 5 Take the line B-B sectional view of section.

As shown in figure 5, for the tongue 15 of the vortex flow fan 100 of present embodiment, in 12 side of outlet of tongue 15 Side 15h and the cylindrical portion 13 of housing 10 the corner 15e that is intersected of inner wall, as shown in fig. 6, tongue 15 and blade 23, Gap between 24 is maximum.

In addition, as shown in figure 5, the gap is formed as fan-shaped in tongue 15 centered on the 15e of corner and is formed on its surface Inclined-plane 15f, the front end for thus tending to fan-shaped become narrow gradually, from fig. 6, it can be seen that 11 side of suction inlet from its front end keeps one It is fixed.

The tongue 15 of present embodiment, from the point of view of in shape, as shown in figure 5, being formed as with a part for cylindrical portion 13 For the approximate trapezoid on one side, the corner 15e in 12 side of outlet on one side of cylindrical portion 13, makes tongue 15 and blade 23,24 Gap it is maximum, also, the fan-shaped inclined-plane 15f centered on the 15e of corner is formed at tongue 15 (upside tongue 15a, downside Tongue 15b (with reference to Fig. 6)), become the shape to diminish in the gap of fan-shaped front and blade 23,24.

In order to confirm effect that the shape of tongue 15 as described above is brought, present embodiment structure (hereinafter referred to as " research structure ") and the structure (hereinafter referred to as " reference configuration ") formed substantially that is illustrated using Fig. 1~4 in, make impeller Rotating speed be 5900rpm, away from suction inlet 1m position implement noise level measurement.

Fig. 7, Fig. 8 show the above results.Fig. 7 is the measurement result of reference configuration, and Fig. 8 is the measurement result of research structure.

From the point of view of these results, the nZ components of the about 30dBA near 4.5kHz observed in reference configuration are being studied It is not confirmed in structure, therefore good result can be obtained.

In addition, Fig. 9 shows the P-Q characteristics (static pressure-air quantity of the research structure and reference configuration in the case of making rotating speed identical Characteristic), the P-Q characteristics of research structure obtain the characteristic roughly the same with the P-Q characteristics of reference configuration, and thereby, it is possible to confirm to grind Study carefully the problems such as penalty is not present in structure, realize the reduction of nZ components.

According to the vortex flow fan 100 of above-mentioned embodiment, as shown in fig. 6, possessing：Impeller 20, it is in the outer of wheel hub 21 Week has blade 23,24；Outer rotor motor 30, it rotates impeller 20；And housing 10.Above-mentioned housing 10 is configured to wrap Include：Cylindrical portion 13, it covers wheel hub 21；Circular gas chamber 14, it is engaged with the periphery of cylindrical portion 13, and covers blade 23rd, 24 outer circumference face and upper and lower surface；Suction inlet 11, it is engaged with gas chamber 14；Outlet 12, it is from suction inlet 11 The position being circumferentially separated is engaged with gas chamber 14；And tongue 15, it will isolate between suction inlet 11 and outlet 12.Such as Fig. 5 Shown, tongue 15 is at the angle of the side 15h of 12 side of outlet and the inner wall of cylindrical portion 13 of tongue 15 tongue 15 intersected Portion 15e makes the gap maximum between tongue 15 and blade 23,24, which forms sector in tongue 15 centered on the 15e of corner Inclined-plane 15f, thus tend to fan-shaped front end and narrow, and keep certain in 11 side of suction inlet from front end, so as to The pressure oscillation of tongue 15, the particularly upper and lower surface of blade 23,24 is enough effectively inhibited, nZ sounds, height can be greatly reduced Frequency ripple.

In addition, for the vortex flow fan 100 of present embodiment, as shown in fig. 6, motor is outer rotor motor 30, tool The armature spindle 40 at the standby center for being fixed on wheel hub 21 and the rotor magnet for the inner peripheral surface that wheel hub 21 is installed on via rotor yoke 38 39, wheel hub 21 is used as the rotor case of outer rotor motor 30, therefore, and above-mentioned in order to make for impeller 20 Impeller 20 rotates and in addition sets the situation of outer rotor motor to compare, and can compactly form the structure of outer rotor motor.

In addition, for the vortex flow fan 100 of present embodiment, as shown in fig. 6, possessing：It can rotatably be supported on and turn The bearing case 31 and stator 32 of sub- axis 40, which has is configured at outside bearing in a manner of opposed with rotor magnet 39 The coil 37 of the periphery of shell 31, outer rotor motor 30 is formed using rotor magnet 39 and stator 32, therefore being capable of compactly structure Into the vortex flow fan 100 for being accommodated with motor part.

More than, the preferred embodiment of the present invention is described in detail, but the present invention is not limited to above-mentioned Embodiment, in the range of the idea of the invention described in claims, can carry out various deformations, change.

Claims (3)

1. A kind of 1. vortex flow fan, it is characterised in that

   Possess：

   Impeller, it has blade in the periphery of wheel hub；

   Motor, it rotates above-mentioned impeller；And

   Housing, the housing are configured to include：Cylindrical portion, it covers above-mentioned wheel hub；Circular gas chamber, itself and above-mentioned cylindrical shape The inner wall engagement in portion, and cover outer circumference face and the upper and lower surface of above-mentioned blade；Suction inlet, it is engaged with above-mentioned gas chamber； Outlet, it is engaged from the position that above-mentioned suction inlet is circumferentially separated with above-mentioned gas chamber；And tongue, it is by above-mentioned suction inlet Isolate between above-mentioned outlet,

   For above-mentioned tongue, in the side of the above-mentioned outlet side of above-mentioned tongue and the above-mentioned inner wall institute of above-mentioned cylindrical portion At the angle of tongue intersect, above-mentioned, make the axial gap between above-mentioned tongue and above-mentioned blade maximum,

   Above-mentioned axial gap due to above-mentioned tongue formed centered on above-mentioned angle sector inclined-plane and tend to it is above-mentioned it is fan-shaped before Hold and narrow, and keep certain in the suction inlet side from above-mentioned front end.
2. 2. vortex flow fan according to claim 1, it is characterised in that

   Said motor is outer rotor motor, is possessed：

   Armature spindle, 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 is used as the rotor case of above-mentioned outer rotor motor.
3. 3. vortex flow fan according to claim 2, it is characterised in that

   Possess：

   Bearing case, above-mentioned rotor e axle supporting is to rotate by it；And

   Stator, it has the winding for the periphery that above-mentioned bearing case is configured in a manner of opposed with above-mentioned rotor magnet,

   Motor part is formed by above-mentioned rotor magnet and said stator.