CN209294137U - Pressure fan - Google Patents

Abstract

The utility model provides pressure fan.Pressure fan includes motor；Impeller；Blower casing, the blower casing is in inner containment motor and impeller；Multiple stator blades；And extension, the extension are configured at circumferential a part below stator blade.Stator blade configuration is in the flow path between the inner peripheral surface of the outer peripheral surface and blower casing that are formed in motor.The lower end configuration of one end face of the end face of the circumferential side as stator blade is at the position for leaning on the circumferential other side than upper end.Multiple stator blades include: the 1st stator blade, and the 1st stator blade is overlapped with extension in the circumferential；And the 2nd stator blade, the 2nd stator blade are adjacent with the 1st stator blade in the circumferential.1st guide portion possessed by one end face of the 1st stator blade is different from at least part of shape of the 2nd guide portion possessed by an end face of the 2nd stator blade.

Description

Pressure fan

Technical field

The present invention relates to pressure fan.

Background technique

In the past, centrifugal blower had been used in dust catcher or the air supply device of the contour output of air intake and exhaust system.Centrifugation air-supply Machine includes motor, and the motor generates driving force；Impeller, the impeller are blown；And blower casing, the air-supply Machine shell accommodates motor and impeller.Moreover, the air-flow generated by impeller is by being formed between motor and blower casing Flow path and be discharged.About previous centrifugal blower, such as it is recorded in Japanese Unexamined Patent Publication 2010-281232 bulletin.

For example, making the gas generated by impeller in the electric blowing machine documented by Japanese Unexamined Patent Publication 2010-281232 bulletin Stream is discharged by following flow path, and the flow path is formed in the motor shell and appearance of a part of the motor as electric blowing machine It receives between impeller and the air guide element of motor (Fig. 1).

Patent document 1: Japanese Unexamined Patent Publication 2010-281232 bulletin

Summary of the invention

The invention technical task to be solved

Electric blowing machine documented by Japanese Unexamined Patent Publication 2010-281232 bulletin is fixed in side downstream across sound break In main body of dust collector.The fixed part of electric blowing machine and sound break configures on the extended line of flow path (Fig. 6,0031 section).

In this way, for the component or fixing motor and external component of fixing motor and receiving motor, sometimes in flow path Or fixed part is set on the extended line of flow path.If configuring some works, flow path in flow path or on the extended line of flow path Air-flow on interior or flow path extended line and the works collide, it is possible to the reason of becoming noise.

It is an object of the invention to control because air-flow and works of the configuration on flow path or on the extended line of flow path touch The noise for hitting and generating.

For solving the means of technical task

The pressure fan of this 1st illustrative invention includes motor, and the motor has stationary part and rotating part, described Stationary part includes stator and the motor cover for keeping the stator, more than the rotating part is revolved centered on the lower central axis extended Turn；Centrifugal type impeller, the centrifugal type impeller is configured at the top of the motor, and rotates together with the rotating part；Air-supply Machine shell, blower casing motor described in inner containment and the impeller；Multiple stator blades, the multiple stator blade It is configured between the motor and the blower casing radially；And extension, the extension configuration is in circumferential direction A part, the motor have the outer peripheral surface of the tubular vertically extended, and the blower casing includes top plate portion, the top Plate portion is configured at the top of the impeller, and is configured with air entry in center；And the wall portion of tubular, the wall portion of the tubular exist The radial outside of the motor is extended downward from the top plate portion, outside the inner peripheral surface of the wall portion and the described of the motor Constituting between circumferential surface has flow path, and the flow path is connected in the axial direction, and has the outlet being connected to exterior space in lower end, The multiple stator blade is configured in the flow path above the extension, in each week as the multiple stator blade Into an end face of the end face of side, lower end configuration is at the position for leaning on the circumferential other side than upper end, the multiple stator blade Piece includes: the 1st stator blade, and the circumferential at least part of circumferential position of the 1st stator blade is overlapped with the extension；With And the 2nd stator blade, it is configured adjacently the 2nd stator blade with the 1st stator blade in the circumferential, as the 1st stator blade An end face the 1st one end face have the lower end comprising the 1st one end face the 1st guide portion, it is quiet as the described 2nd 2nd one end face of an end face for blade has the 2nd guide portion, and the 2nd guide portion includes the lower end of the 2nd one end face Portion, the 1st guide portion are different from at least part of shape of the 2nd guide portion.

Invention effect

According to the 1st illustrative invention of the application, the direction of the air-flow of the circumferential side by the 1st stator blade can be made It is different from the direction of the air-flow of the circumferential side by the 2nd stator blade.Make air-flow thereby, it is possible to consider the position of extension Direction is different according to circumferential position.Thus, it is possible to control the noise because air-flow and extension collision due to generate.

Detailed description of the invention

Fig. 1 is the longitudinal section view of centrifugal blower involved in the 1st embodiment.

Fig. 2 is to be shown schematically in centrifugal blower involved in the 1st embodiment the stator blade from radial outside The figure of positional relationship between piece and extension.

Fig. 3 be shown schematically in it is outside from diameter in centrifugal blower involved in a variation of the 1st embodiment Observe the figure of the positional relationship between stator blade and extension in side.

Fig. 4 is the longitudinal section view of centrifugal blower involved in the 2nd embodiment.

Fig. 5 is the bottom view of centrifugal blower involved in the 2nd embodiment.

Fig. 6 is to be shown schematically in centrifugal blower involved in the 2nd embodiment the stator blade from radial outside The figure of positional relationship between piece and extension.

Fig. 7 be shown schematically in it is outside from diameter in centrifugal blower involved in a variation of the 2nd embodiment Observe the figure of the positional relationship between stator blade and extension in side.

Fig. 8 is shown schematically in centrifugal blower involved in other variations of the 2nd embodiment from radial direction Observe the figure of the positional relationship between stator blade and extension in outside.

Fig. 9 is the longitudinal section view of centrifugal blower involved in variation.

Specific embodiment

Hereinafter, being illustrated referring to attached drawing to illustrative embodiment of the invention.It, will be in addition, in this application The direction of the centerline axis parallel of centrifugal blower is referred to as " axial direction ", and the direction of the central axis upright with centrifugal blower is claimed Make " radial direction ", " circumferential direction " will be referred to as along the direction of the circumference centered on the central axis of centrifugal blower.Also, in the application In, using axial direction as up and down direction, each section is illustrated on impeller side relative to motor shape and positional relationship.But Be, the definition of the up and down direction be not offered as limit centrifugal blower during fabrication and use when direction.

The 1st embodiment > of < 1.

The structure > of < 1-1. centrifugal blower

Fig. 1 is the longitudinal section view of centrifugal blower 1A involved in the 1st embodiment.As shown in Figure 1, the centrifugal blower 1A has motor 11A, impeller 12A, blower casing 13A, multiple stator blade 14A and extension 15A.

Motor 11A has stationary part 20A and rotating part 30A.Stationary part 20A includes stator 21A and motor cover 22A.Motor It covers 22A and keeps stator 21A.It is rotated centered on the lower central axis 9A extended of rotating part 30A or more.Also, motor 11A has The outer peripheral surface 110A of the tubular extended up and down.

Impeller 12A is configured at the top of motor 11A.Impeller 12A be rotated together with the rotating part 30A of motor 11A from Cardioid impeller.

Blower casing 13A is in inner containment motor 11A and impeller 12A.Blower casing 13A has top plate portion 131A With wall portion 132A.Top plate portion 131A is configured at the top of impeller 12A.Also, air entry is configured in the center of top plate portion 131A 101A.Radial outside of the wall portion 132A in motor 11A is cylindrical in shape downwards extension from top plate portion 131A.

It constitutes between the inner peripheral surface of the wall portion 132A of the outer peripheral surface 110A and blower casing 13A of motor 11A in axis Connected flow path 10A upwards.Flow path 10A has the outlet 102A being connected to exterior space in its lower end.

Multiple stator blade 14A are configured at radially between motor 11A and blower casing 13A.Extension 15A configuration exists Circumferential a part.In addition, the extension 15A of present embodiment extends from the lower end of blower casing 13A to radially inner side. Also, extension 15A is contained in the component with blower casing 13A one.Multiple stator blade 14A are configured at extension 15A Top.Also, multiple stator blade 14A configurations are in flow path 10A.

Configuration and shape > of the < 1-2. about stator blade

Fig. 2 is the positional relationship schematically shown from radial outside between stator blade 14A and extension 15A Figure.The axial direction that centrifugal blower 1A is expressed as in Fig. 2 is the up and down direction of attached drawing, and the circumferential direction of centrifugal blower 1A is a left side for attached drawing Right direction.

As shown in Fig. 2, multiple stator blade 14A are configured across interval in the circumferential.It is each as multiple stator blade 14A's In one end face 60A of the end face of circumferential side, lower end configuration is at the position for leaning on the circumferential other side than upper end.

Multiple stator blade 14A have the 1st stator blade 141A and the 2nd stator blade 142A.The circumferential direction of 1st stator blade 141A is extremely At least part of circumferential position is overlapped with extension 15A.It is adjacent in the circumferential with the 1st stator blade 141A and is configured with the 2nd stator blade Piece 142A.

The 1st one end face 61A of an end face 60A as the 1st stator blade 141A has the 1st guide portion 612A.1st guide portion 612A includes the lower end of the 1st one end face 61A.The 2nd one end face 62A of an end face 60A as the 2nd stator blade 142A has the 2 guide portion 622A.2nd guide portion 622A includes the lower end of the 2nd one end face 62A.

1st guide portion 612A is different from at least part of shape of the 2nd guide portion 622A.Thereby, it is possible to make by the 1st The direction of the air-flow of the circumferential side of stator blade 141A is with the air-flow of the circumferential side by the 2nd stator blade 142A towards not Together.Therefore, it can be considered that the position of extension 15A and make air-flow direction it is different according to circumferential position.Thus, it is possible to control The noise generated due to air-flow and extension 15A are collided.

Also, in centrifugal blower 1A, it is adjacent to the circumferential side of the 1st stator blade 141A and is configured with the 2nd stator blade Piece 142A.1st guide portion 612A with downward and to the circumferential other side tilt.2nd guide portion 622A is with downward And it is tilted to the circumferential other side.Also, in axial position, the 1st guide portion 612A is relative to axial tilt angle ratio 2nd guide portion 622A is big relative to axial tilt angle.

Here, showing the air-flow in flow path 10A with arrow in Fig. 2.Along the 1st one end face of the 1st stator blade 141A The air-flow F1A of 61A flowing is directed to the circumferential other side by the 1st guide portion 612A.Therefore, inhibit along the 1st stator blade Extension 15A of the air-flow F1A of the circumferential side flowing of 141A with configuration in the lower section of the 1st stator blade 141A collides.Separately On the one hand, the air-flow F2A flowed along the 2nd one end face 62A of the 2nd stator blade 142A is by the 2nd guide portion 622A by than gas Flow direction guidance of the F1A below vertical.Thus, the air-flow F2A flowed along the circumferential side of the 2nd stator blade 142A is the The lower section flow direction of 2 stator blade 142A leans on the position of the circumferential other side than extension 15A.Inhibit air-flow F2A and extension as a result, 15A collides.

In this way, inclination of the 1st guide portion 612A relative to axial tilt angle than the 2nd guide portion 622A relative to axial direction Angle is big.The air-flow in flow path 10A is inhibited to collide with extension 15A as a result,.As a result, can reduce because air-flow with Extension 15A is collided and the noise generated and vibration.

< 1-3. variation >

Fig. 3 be shown schematically in it is outside from diameter in centrifugal blower involved in a variation of the 1st embodiment Observe the figure of the positional relationship between stator blade 14B and extension 15B in side.

In the example in fig. 3, an end face 60B of multiple stator blade 14B is respectively provided with rectification part 601B and guide portion 602B.It is whole Stream portion 601B includes the upper end of an end face 60B.Guide portion 602B is configured at the lower section of rectification part 601B, includes an end face 60B Lower end.

When from radial, each rectification part 601B of multiple stator blade 14B is same shape.Also, multiple stator blade 14B Each rectification part 601B equally spaced configure in the circumferential.In this way, there is same shape in the top of each guide portion 602B and wait The rectification part 601B of compartment of terrain configuration.Therefore, shape can be flowed uniformly into from the gas of the top of stator blade 14B flow direction lower section Cheng Yu is in the circumferential in each flow path between adjacent stator blade 14B.Thus, from the top of stator blade 14B towards stator blade Air-flow between 14B is not likely to produce circumferential unevenness.As a result, can reduce air-flow is flowed into production when between stator blade 14B Raw noise.

In the example in fig. 3, in the same manner as the 1st above-mentioned embodiment, guide portion 602B's as the 1st stator blade 141B At least part of shape of 1st guide portion 612B and the 2nd guide portion 622B of the guide portion 602B as the 2nd stator blade 142B It is different.Keep the direction of air-flow different according to circumferential position thereby, it is possible to consider the position of extension 15B.Thus, it is possible to control Make the noise because air-flow and extension 15B collision due to generate.

Also, in axial position, the 1st guide portion 612B is relative to axial tilt angle than the 2nd guide portion 622B is big relative to axial tilt angle.Thereby, it is possible to inhibit the air-flow in flow path 10B to collide with extension 15B.Its As a result, it is possible to reduce the noise generated by air-flow and extension 15B collision due to and vibration.In addition, in the example in fig. 3, the 2nd Guide portion 622B with downward and to the circumferential other side tilt.However, the 2nd guide portion 622B can also with it is axially vertical.

The 2nd embodiment > of < 2.

The structure > of < 2-1. centrifugal blower

Fig. 4 is the longitudinal section view of centrifugal blower 1 involved in the 2nd embodiment.Fig. 5 is looking up for centrifugal blower 1 Figure.The centrifugal blower 1 be attract from the air entry 101 for being set to top top air and downwards the Scroll-type that is discharged from Heart fan.Scroll-type centrifugal fan high efficiency and noise is few compared with Xi Luoke type centrifugal fan.

The centrifugal blower 1 of present embodiment is for example arranged in dust catcher, uses to generate attraction.But Centrifugal blower of the invention can also other than dust catcher on the way using.For example, it is also possible to be installed in mist extractor The fan of machine or ventilation duct for building for other blowing devices such as exhaust apparatus, household appliances, medical instrument with And large scale equipment of industry etc. and carry out air-breathing and exhaust.

As shown in figure 4, centrifugal blower 1 have motor 11, impeller 12, blower casing 13, multiple stator blades 14 and Extension 15.The aftermentioned rotating part 30 and impeller 12 of motor 11 are rotated centered on central axis 9.

Motor 11 is inner-rotor type Brushless DC motor.Motor 11 has stationary part 20 and rotating part 30.20 phase of stationary part It is opposing stationary for blower casing 13.Rotating part 30 is supported to can be relative to stationary part 20 centered on central axis 9 And it rotates.

Stationary part 20 has stator 21, motor cover 22, bottom plate 23, circuit board 24, upper bearing (metal) 25 and lower bearing 26.Rotation Portion 30 has axis 31 and rotor 32.

Stator 21 is the armature that basis generates magnetic flux from the driving current that circuit board 24 supplies.Stator 21 is annularly surround Around the central axis 9 extended up and down.As shown in figure 4, stator 21 has stator core 211, insulating part 212 and multiple lines Circle 213.

The stacked steel plate made of laminated electromagnetic steel plate in the axial direction of stator core 211 is constituted.Stator core 211 has circle Cricoid core-back 41 and the multiple teeth 42 extended from core-back 41 to radially inner side.Core-back 41 and central axis 9 Substantially coaxially configure.Multiple teeth 42 arrange at substantially equal intervals in the circumferential.

Insulating part 212 is installed on stator core 211.Resin of the materials'use of insulating part 212 as insulator.Insulating part The axial both ends of the surface of 212 covering teeth 42 and the both ends of the surface of circumferential direction.Coil 213 is by being wound in tooth 42 across insulating part 212 The conducting wire of surrounding is constituted.

Motor cover 22 is to maintain the component of stator 21 and upper bearing (metal) 25.As shown in figure 4, motor cover 22 has upper plate portion 221, side plate 222 and protruding portion 223.In the present embodiment, a part of the outer peripheral surface of stator core 211 be configured to from Motor cover is exposed.The periphery for the motor 11 being made of a part of the outer peripheral surface of motor cover 22 and the outer peripheral surface of stator core 211 Face 110 is cylindrical in shape extension in the up-down direction.

Protruding portion 223 is prominent to radial outside near the lower end of side plate 222.

Bottom plate 23 is at least part of component for covering the opening of lower section of motor cover 22.Bottom plate 23 and central axis 9 Generally perpendicularly extend.Bottom plate 23 has the central portion 231 for keeping lower bearing 26 and extends from central portion to radial outside outer Prolong portion 232.A part comprising outer end of epitaxy part 232 is overlapped configuration with the protruding portion 223 of motor cover 22 in the axial direction.It is fixed Son 21, circuit board 24, upper bearing (metal) 25, lower bearing 26 and rotor 32 are contained in the shell being made of motor cover 22 and bottom plate 23 Inside.

Configuration prolonging in circumferential a part is constituted by the protruding portion 223 of motor cover 22 and the epitaxy part 232 of bottom plate 23 Extending portion 15.As shown in figure 4, the epitaxy part 232 of the protruding portion 223 of motor cover 22, bottom plate 23 and the lower end of blower casing 13 Portion is threadably secured and fixes.That is, extension 15 is the fixed part of fixing motor cover 22 and blower casing 13.

As shown in figure 5, the epitaxy part 232 of the protruding portion 223 of motor cover 22 and bottom plate 23 is set to 3 circumferential positions. In addition, the fixed position of motor cover 22 and blower casing 13 is not limited to 3 positions, it is also possible to 2 positions or 4 positions More than.Also, motor cover 22 can also be fixed with blower casing 13 by other methods.

Circuit board 24 generally perpendicularly configures at than the position on the lower of stator 21 with central axis 9.In circuit board 24 It is installed with the electronic component for constituting circuit, the circuit is used to supply driving current to coil 213.Constitute the conducting wire of coil 213 End be electrically connected with the circuit on circuit board 24.

Upper bearing (metal) 25 is the mechanism relative to motor cover 22 by the bearing of axis 31 for that can rotate.Lower bearing 26 is the bottom of relative to The mechanism that plate 23 can rotate the bearing of axis 31.Upper bearing (metal) 25 and lower bearing 26 are for example deposited using between inner ring and outer ring In the ball bearing of spherical rotor.

Axis 31 is the columned component configured along central axis 9.Axis 31 is supported by upper bearing (metal) 25 and lower bearing 26, and It is rotated centered on central axis 9.The upper end of axis 31 is more upwardly projecting than motor cover 22, and is fixed with impeller 12.In this reality It applies in mode, impeller 12 is directly fixed on axis 31, but impeller 12 can also be fixed on axis 31 indirectly by other component.

Rotor 32 is fixed on axis 31, and rotates together with axis 31.The rotor 32 of present embodiment is by being shaped generally as cylinder The magnet resin of shape is constituted.Magnetize the pole N out and the pole S the outer peripheral surface of rotor 32 is circumferentially alternating.Also, the periphery of rotor 32 Face is opposite with the end face of the radially inner side of tooth 42 across small gap radially.That is, rotor 32 have radially with The opposite magnetic pole strength of stator 21.

In addition, in the present embodiment, the rotor 32 made of magnet resin has been used, but rotor 32 can also will be more A magnet is fixed on outer peripheral surface or the inside of the cylindric rotor core as magnetic substance.Also, it also can be used single The magnet of component and constitute rotor 32.

In drive motor 11, driving current is supplied from the circuit on circuit board 24 to coil 213, in stator core 211 Multiple teeth 42 in generate magnetic flux.Circumferential torsion is generated by the effect that the magnetic flux between tooth 42 and rotor 32 generates as a result, Square.As a result, rotating part 30 is rotated centered on central axis 9.Then, impeller 12 is revolved with the rotation of rotating part 30 Turn.

Impeller 12 is so-called Scroll-type centrifugal impeller.Impeller 12 is configured at the top of the motor cover 22 of motor 11.Such as Fig. 2 Shown, impeller 12 has upper shield 51, lower shield 52 and multiple blades 53.

Upper shield 51 has canister portion 511 and encloses pendulum portion 512.Upper shield 51 is configured at lower shield 52 and multiple blades 53 Top.Canister portion 511 is the substantially cylindric position centered on central axis 9.Pendulum portion 512 is enclosed from the lower end of canister portion 511 It is extended to radial outside.Suction is formed by the inner peripheral surface of the aftermentioned cylindrical portion 130 of the inner peripheral surface and blower casing 13 of canister portion 511 Port 101.That is, being configured with air entry 101 in the center of upper shield 51.

Lower shield 52 is generally perpendicularly extended in the top of motor cover 22 with central axis 9.Multiple configurations of blade 53 are upper Between shield 51 and lower shield 52.Multiple blades 53 configure at substantially equal intervals in the circumferential.When driving centrifugal blower 1, Gas between upper shield 51 and lower shield 52 is accelerated by multiple blades 53 to radial outside.

Blower casing 13 has top plate portion 131, wall portion 132 and cylindrical portion 130.Top plate portion 131 is configured at impeller 12 Top, and annularly extended along the upper surface of upper shield 51.Wall portion 132 motor 11 radial outside from top plate portion 131 Radial outer end be cylindrical in shape extension downwards.Motor 11 and impeller 12 are contained in the radially inner side of wall portion 132.Cylindrical portion 130 From the radial inner end cylindrical extension downwards of top plate portion 131.By the inner peripheral surface and cylindrical portion 130 of the canister portion 511 of impeller 12 Inner peripheral surface form air entry 101.That is, being configured with air entry 101 in the center of top plate portion 131.

The blower casing 13 of present embodiment is by upper housing 133, central shell 134 and this 3, downside shell 135 Cricoid component is formed.It, can also be by 2 or 4 or more portions however, blower casing 13 can be formed by 1 component Part is formed.

The inner peripheral surface of the wall portion 132 of the outer peripheral surface 110 and blower casing 13 of motor 11 is matched across interval radially It sets.Constituting between the outer peripheral surface 110 and the inner peripheral surface of wall portion 132 has the flow path 10 being connected in the axial direction.Flow path 10, which becomes, to be driven The flow path of gas when dynamic centrifugal blower 1.Flow path 10 has the outlet 102 being connected to exterior space in its lower end.

Multiple stator blades 14 are configured at radially between motor 11 and blower casing 13.Also, multiple stator blades 14 It is configured in flow path 10 in the top of extension 15.In the present embodiment, stator blade 14 and motor cover 22 are formed as one portion Part.However, stator blade 14 can be formed as one component with the component for constituting blower casing 13, it is also possible to and motor cover 22 And the component that blower casing 13 is seperated.The configuration and shape of stator blade 14 are described later.

When driving centrifugal blower 1, the stator 21 of Xiang Mada 11 supplies driving current, the rotating part 30 and leaf of motor 11 12 rotation of wheel.When impeller 12 rotates, as shown by the arrows in Figure 4, attract the top of blower casing 13 via air entry 101 Gas.The gas being attracted between upper shield 51 and lower shield 52 to the radial outside of impeller 12 by being discharged.

The gas being discharged to the radial outside of impeller 12 along blower casing 13 inner peripheral surface downward to change side To, and towards advancing below axial direction in flow path 10.Then, the air-flow the lower end of flow path 10 from outlet 102 by from The external discharge of heart pressure fan 1.

Configuration and shape > of the < 2-2. about stator blade

Next, the configuration and shape to the stator blade 14 in centrifugal blower 1 are illustrated.Fig. 6 is schematically The figure of positional relationship from radial outside between stator blade 14 and extension 15 is shown.Centrifugal blower 1 is expressed as in Fig. 6 Axial direction be attached drawing up and down direction, the circumferential direction of centrifugal blower 1 is the left and right directions of attached drawing.

As shown in fig. 6, multiple stator blades 14 are configured across interval in the circumferential.Multiple stator blades 14 are respectively provided with conduct One end face 60 of the end face of circumferential side and the other end 70 of the end face as the circumferential other side.

The respective lower end configuration in an end face 60 of multiple stator blades 14 is at the position for leaning on the circumferential other side than upper end. In addition, the air-flow generated in flow path 10 by the rotation of impeller 12 is in the upper of stator blade 14 when driving centrifugal blower 1 Side is from upper side and circumferential side flows to lower side and the circumferential other side.That is, having from impeller 12 towards the air-flow of stator blade 14 With the convolution ingredient from above towards lower section and from circumferential side towards the circumferential other side.

Multiple stator blades 14 include the 1st stator blade 141, the 2nd stator blade 142, the 3rd stator blade 143, the 4th stator blade 144 with And the 5th stator blade 145.The circumferential at least part of circumferential position of 1st stator blade 141 is overlapped with extension 15.In circumferential direction Upper be adjacent to the 1st stator blade 141 is configured with the 2nd stator blade 142.Specifically, the circumferential side phase with the 1st stator blade 141 It is configured with the 2nd stator blade 142 adjacently.

In the present embodiment, the 1st stator blade 141, the 2nd stator blade are configured in order from the circumferential other side towards circumferential side Piece 142, the 3rd stator blade 143, the 4th stator blade 144 and the 5th stator blade 145.Moreover, in the circumferential side of the 5th stator blade 145 Reconfiguration has the 1st stator blade 141.

As shown in figure 5, being equally spaced configured with 3 extensions 15 in the circumferential.Also, multiple stator blades 14 are relative to prolonging The relative position of extending portion 15 is identical relative to each extension 15.Thus, multiple stator blades relative to the configuration of 3 extensions 15 14 separately include 3 group of the 1st stator blade 141, the 2nd stator blade 142, the 3rd stator blade 143, the 4th stator blade 144 and the 5th stator blade 145。

One end face 60 of stator blade 14 is respectively provided with rectification part 601 and guide portion 602.Rectification part 601 includes an end face 60 Upper end.Guide portion 602 includes the lower end of an end face 60.

When from radial, each rectification part 601 of multiple stator blades 14 is same shape.In addition, multiple stator blades 14 It is also same shape when each rectification part 601 is from end on observation.Also, it is equally spaced configured with multiple stator blades 14 in the circumferential Each rectification part 601.In this way, the rectification part 601 that there is same shape and equally spaced configure in the top of each guide portion 602.By This, the gas for flowing to lower section from the top of stator blade 14, which can flow uniformly into, is formed in stator blade 14 adjacent in the circumferential Between each flow path in.Thus, from the top of stator blade 14 towards the air-flow between stator blade 14 be not likely to produce it is circumferential not ?.As a result, can reduce the noise generated when air-flow is flowed between stator blade 14.

Rectification part 601 is respectively as the upper end from an end face 60 is tilted to the circumferential other side downward.Also, it is whole Stream portion 601 gradually becomes smaller downward with from the upper end of an end face 60 respectively relative to axial tilt angle.It is whole Air-flow with the convolution ingredient from impeller 12 towards stator blade 14 is rectified into the air-flow towards axial lower section by stream portion 601.

Here, an end face 60 of the 1st stator blade 141 is referred to as the 1st one end face 61, by an end face 60 of the 2nd stator blade 142 One end face 60 of the 3rd stator blade 143 is referred to as the 3rd one end face 63, by one end of the 4th stator blade 144 by referred to as the 2nd one end face 62 Face 60 is referred to as the 4th one end face 64, and an end face 60 of the 5th stator blade 145 is referred to as the 5th one end face 65.

Also, the guide portion 602 of the 1st one end face 61 is referred to as the 1st guide portion 612, by the guide portion of the 2nd one end face 62 602 are referred to as the 2nd guide portion 622, the guide portion 602 of the 3rd one end face 63 are referred to as the 3rd guide portion 632, by the 4th one end face 64 Guide portion 602 is referred to as the 4th guide portion 642, and the guide portion 602 of the 5th one end face 65 is referred to as the 5th guide portion 652.1st draws Lead the lower end that portion 612 includes the 1st one end face 61.2nd guide portion 622 includes the lower end of the 2nd one end face 62.

1st guide portion 612 is different from at least part of shape of the 2nd guide portion 622.It is quiet by the 1st thereby, it is possible to make The direction of the air-flow of the circumferential side of blade 141 and the direction of the air-flow of the circumferential side by the 2nd stator blade 142 are different.Cause This, it can be considered that the position of extension 15 and make air-flow direction it is different according to circumferential position.Thus, it is possible to control because of air-flow The noise for colliding and generating with extension 15.

1st guide portion 612,1 the 622, the 3rd guide portion 632 of the 2nd guide, the 4th guide portion 642 and the 5th guide portion 652 Respectively with downward and to the circumferential other side tilt.In axial position, the 1st guide portion 612 is relative to axial direction Tilt angle is bigger relative to axial tilt angle than the 2nd guide portion 622.

Here, showing the air-flow in flow path 10 with arrow in Fig. 6.Along the 1st one end face 61 of the 1st stator blade 141 The air-flow F1 of flowing is guided by the 1st guide portion 612 to the circumferential other side.Therefore, inhibit the week along the 1st stator blade 141 Extension 15 of the air-flow F1 flowed to side with configuration in the lower section of the 1st stator blade 141 collides.On the other hand, along The air-flow F2 of the 2nd one end face 62 flowing of 2nd stator blade 142 by the 2nd guide portion 622 by than air-flow F1 below the vertical Direction guidance.Thus, inhibit the air-flow F2 flowed along the circumferential side of the 2nd stator blade 142 under the 2nd stator blade 142 The Fang Liuxiang circumferential direction other side and collide with extension 15.

In this way, the tilt angle of the 1st guide portion 612 is bigger than the tilt angle of the 2nd guide portion 622.Inhibit flow path 10 as a result, Interior air-flow collides with extension 15.It is generated due to air-flow and extension 15A collide as a result, can reduce Noise and vibration.

1st guide portion 612, the 2nd guide portion 622, the 3rd guide portion 632, the 4th guide portion 642 and the 5th guide portion 652 are divided It is not relative to axial tilt angle with the curved surface that becomes larger downward.In this way, by each guide portion 602 in song Planar is easy to guide the air-flow flowed along each guide portion 602 to desired direction.Therefore, pass through the 1st guide portion 612 Shape in curved surface is easy to guide the air-flow F1 flowed along the 1st guide portion 612 to the circumferential other side.

Also, the radius of curvature of the 1st guide portion 612 is smaller than the radius of curvature of the 2nd guide portion 622.Therefore, draw along the 1st The air-flow F1 for leading the flowing of portion 612 is further guided to the circumferential other side than the air-flow F2 flowed along the 2nd guide portion 622.

Here, in the present embodiment, extension 15 and 5 stator blades 141~145 repeat to match in the circumferential at equal intervals It sets.In this case, as shown in fig. 6, leaning on the circumferential other side than the 1st stator blade 141 from the 1st stator blade 141 to configuration Position the 2nd stator blade 142, the radius of curvature of the guide portion 602 of each stator blade 14 is with towards the circumferential other side and gradually Become larger.In addition, " radius of curvature becomes larger " further comprises the curvature half of the guide portion 602 of stator blade 14 adjacent in the circumferential The identical situation of diameter.

Specifically, in the 5th guide portion 652 of the 5th adjacent stator blade 145 of the circumferential other side of the 1st stator blade 141 Radius of curvature is identical as the radius of curvature of the 1st guide portion 612 of the 1st stator blade 141.In the circumferential other side of the 5th stator blade 145 The curvature of 5th guide portion 652 of the radius of curvature and the 5th stator blade 145 of the 4th guide portion 642 of the 4th adjacent stator blade 144 Radius is identical.The radius of curvature of the 3rd guide portion 632 of the 3rd adjacent stator blade 143 in the circumferential other side of the 4th stator blade 144 Radius of curvature than the 4th guide portion 642 of the 4th stator blade 144 is big.Moreover, adjacent in the circumferential other side of the 3rd stator blade 143 The 2nd stator blade 142 the 2nd guide portion 622 radius of curvature than the 3rd stator blade 143 the 3rd guide portion 632 radius of curvature Greatly.

In this way, the radius of curvature by guide portion 602 gradually changes, it is respective along 2 adjacent stator blades 14 The direction of 2 air-flows of one end face 60 flowing differs widely.Thus, inhibit the air-flow to clash and generate disorderly each other Stream.As a result, noise is inhibited to become larger.

In the present embodiment, the axial position phase of the lower end and the lower end of the 2nd stator blade 142 of the 1st stator blade 141 Together.1st guide portion 612 is bigger relative to axial tilt angle than the 2nd guide portion 622 relative to axial tilt angle.As a result, Circumferential distance between the top and bottom of 1st guide portion 612 than between the top and bottom of the 2nd guide portion 622 it is circumferential away from From big.Here, the shape of the rectification part 601 of an end face 60 of multiple stator blades 14 is identical.Thus, the upper end of the 1st one end face 61 Circumferential distance between lower end is bigger than the circumferential distance between the top and bottom of the 2nd one end face 62.

Therefore, under the lower end of the 2nd one end face 62 Yu the 3rd one end face 63 of the 3rd stator blade 143 of the 2nd stator blade 142 Circumferential distance between end is than the lower end of the 1st one end face 61 of the 1st stator blade 141 and the 2nd one end of the 2nd stator blade 142 Circumferential distance between the lower end in face 62 is small.

Also, the shape of the other end 70 of multiple stator blades 14 is identical.In the 1st stator blade 141, the 1st one end face 61 Lower end it is consistent with the lower end of other end 70.That is, the 1st stator blade 141 does not have lower end surface.However, in the 2nd stator blade In 142, the lower end of the lower end of the 2nd one end face 62 and other end 70 configured separate in the circumferential.Therefore, the 2nd stator blade 142 lower end surface has and axially vertical plane.

In this way, the gas in flow path 10 from above towards lower section can be adjusted by configuring stator blade 14 in flow path 10 The circumferential direction of stream.Thereby, it is possible to inhibit air-flow to collide with extension 15.As a result, can reduce because of the air-flow The noise for colliding and generating with extension 15.

< 2-3. variation >

Fig. 7 be shown schematically in it is outside from diameter in centrifugal blower involved in a variation of the 2nd embodiment Observe the figure of the positional relationship between stator blade 14C and extension 15C in side.

In the example of Fig. 7, the shape of the other end 70C of the 2nd stator blade 142C and other comprising the 1st stator blade 141C The shape of the other end 70C of stator blade 14C is different.Specifically, the lower end of the other end 70C of the 2nd stator blade 142C Nearby with downward and to the circumferential other side tilt.Also, the position is relative to axial tilt angle with direction Lower section and the curved surface become larger.Thereby, it is possible to will be by the circumferential side of the 1st stator blade 141C and the 2nd stator blade 142C The air-flow of the circumferential other side is further guided to the circumferential other side.In this way, the shape of other end can also be by each stator blade It is different.

Fig. 8 is shown schematically in centrifugal blower involved in other variations of the 2nd embodiment from radial direction The figure of positional relationship between the stator blade 14D and extension 15D of outside observation.

In the example of Fig. 8, the lower end of the 1st stator blade 141D is configured than other stator blades comprising the 2nd stator blade 142D At the position against the top of the lower end of piece 14D.As a result, by the air-flow F1D of the circumferential side of the 1st stator blade 141D from than other Position stator blade 14D against the top is guided to the circumferential other side.Thus, air-flow F1D is further easy towards the circumferential other side. It collides as a result, further suppressing air-flow F1D and extension 15D.In this way, the axial position of the lower end of stator blade It can be different by each stator blade.

Other variations of < 3. >

More than, illustrative embodiment of the invention is illustrated, but the present invention is not limited to above-mentioned Embodiment.

In above-mentioned embodiment and variation, extension connects motor cover and blower casing, but of the invention It's not limited to that.

Fig. 9 is the longitudinal section view of centrifugal blower 1E involved in variation of the invention.Centrifugal blower 1E is fixed Component 8E in the outside of centrifugal blower 1E come using.In centrifugal blower 1E, motor cover 22E includes fixed canister portion 224E, the fixed lower end of the canister portion 224E than blower casing 13E more extend downward；And interconnecting piece 225E, it is described Interconnecting piece 225E extends from fixed canister portion 224E towards component 8E to radial outside.That is, interconnecting piece 225E is in blower casing The lower section of 13E extends from motor 11E to radial outside.Also, interconnecting piece 225E connection motor 11E and external component 8E.

In the example of Fig. 9, interconnecting piece 225E constitutes configuration in the extension of circumferential a part in the lower section of stator blade 14E Portion 15E.In this way, extension can be a part of connection centrifugal blower and the interconnecting piece of external component.

Also, in above-mentioned embodiment and variation, the extension of same shape is in circumferential direction when from radial On configure at equal intervals.Therefore, the configuration relation between the stator blade on the periphery of 1 extension and the periphery of other extensions is quiet Configuration relation between blade is identical.However, the present invention is not limited to this.Multiple extensions can also be in different shapes respectively Shape.Also, it is circumferentially-spaced not necessarily equal between extension.In this case, the stator blade on the periphery of 1 extension Positional relationship between the stator blade on the periphery of configuration relation and other extensions between piece can also be different.

Also, in the above-described embodiment, stator blade extends to radial outer end from the radial inner end of flow path.However, quiet Blade also can be only fitted to radial a part of region in flow path.

Also, the shape of the detail section about each component, can also with the application each shape shown in the drawings not Together.Also, above-mentioned each element can also be appropriately combined in the range of not conflicting.

Industrial availability

The present invention can be used in pressure fan.

Symbol description

1,1A, 1E ... centrifugal blower, 9,9A ... central axis, 10,10A, 10B ... flow path, 11,11A, 11E ... motor, 12,12A ... impeller, 13,13A, 13E ... blower casing, 14,14A, 14B, 14C, 14D, 14E ... stator blade, 15,15A, 15B, 15C, 15D, 15E ... extension, 20,20A ... stationary part, 21,21A ... stator, 22,22A, 22E ... motor cover, 23 ... bottoms Plate, 30,30A ... rotating part, 60, the end face 60A, 60B ..., 61, the 1st one end face 61A ..., 62, the 2nd one end face 62A ..., 101, 101A ... air entry, 102,102A ... outlet, 110,110A ... outer peripheral surface, 141,141A, 141B, 141C, 141D ... the 1st it is quiet Blade, 142, the 2nd stator blade of 142A, 142B, 142C, 142D ..., 223 ... protruding portions, 225E ... interconnecting piece, 232 ... epitaxy parts, 601,601B ... rectification part, 602,602B ... guide portion, 612, the 1st guide portion of 612A, 612B ..., 622,622A, 622B ... the 2nd Guide portion.

Claims (12)

1. a kind of pressure fan, includes

Motor, the motor have stationary part and rotating part, and the stationary part includes the motor cover of stator and the holding stator, It more than the rotating part is rotated centered on the lower central axis extended；

Centrifugal type impeller, the centrifugal type impeller is configured at the top of the motor, and rotates together with the rotating part；

Blower casing, blower casing motor described in inner containment and the impeller；

Multiple stator blades, the multiple stator blade are configured at radially between the motor and the blower casing；And

Extension, the extension are configured in circumferential a part,

The motor has the outer peripheral surface of the tubular vertically extended,

The blower casing includes

Top plate portion, the top plate portion is configured at the top of the impeller, and is configured with air entry in center；And

The wall portion of the wall portion of tubular, the tubular is extended downward in the radial outside of the motor from the top plate portion,

Constituting between the inner peripheral surface of the wall portion and the outer peripheral surface of the motor has a flow path, flow path phase in the axial direction Even, and there is the outlet being connected to exterior space in lower end,

It is characterized in that,

The multiple stator blade is configured in the flow path above the extension,

In an end face of the end face of each circumferential side as the multiple stator blade, lower end is configured to be leaned on than upper end At the position of the circumferential other side,

The multiple stator blade includes:

The circumferential at least part of circumferential position of 1st stator blade, the 1st stator blade is overlapped with the extension；And

2nd stator blade is adjacent to the 1st stator blade is configured with the 2nd stator blade in the circumferential,

1st one end face of the end face as the 1st stator blade has the 1st guide portion, and the 1st guide portion includes described The lower end of 1st one end face,

2nd one end face of the end face as the 2nd stator blade has the 2nd guide portion, and the 2nd guide portion includes described The lower end of 2nd one end face,

1st guide portion is different from at least part of shape of the 2nd guide portion.

2. pressure fan according to claim 1, which is characterized in that

It is adjacent to the circumferential side of the 1st stator blade and is configured with the 2nd stator blade,

1st guide portion with downward and to the circumferential other side tilt,

2nd guide portion and it is axially vertical or with downward and to the circumferential other side tilt,

In axial position, the 1st guide portion is relative to axial tilt angle than the 2nd guide portion relative to axis To tilt angle it is big.

3. pressure fan according to claim 1 or 2, which is characterized in that

An end face for the multiple stator blade separately includes:

Rectification part, the rectification part include the upper end of an end face；And

Guide portion, the guide portion are configured at the lower section of the rectification part, and include the lower end of an end face,

When from radial, each rectification part of the multiple stator blade is same shape and equally spaced matches in the circumferential It sets,

1st guide portion is the guide portion of the 1st stator blade,

2nd guide portion is the guide portion of the 2nd stator blade.

4. pressure fan according to claim 3, which is characterized in that

The rectification part is tilted to the circumferential other side downward with the upper end from an end face respectively, and opposite It is gradually become smaller in axial tilt angle.

5. pressure fan according to claim 2, which is characterized in that

1st guide portion be with downward and tilted to the circumferential other side and relative to axial tilt angle by The big curved surface of gradual change.

6. pressure fan according to claim 5, which is characterized in that

2nd guide portion be with downward and tilted to the circumferential other side and relative to axial tilt angle by The big curved surface of gradual change,

The radius of curvature of 1st guide portion is smaller than the radius of curvature of the 2nd guide portion.

7. pressure fan according to claim 3, which is characterized in that

The guide portion be respectively with downward and tilted to the circumferential other side and relative to axial tilt angle by The big curved of gradual change,

From the 1st stator blade to the 2nd stator blade, the radius of curvature of the guide portion of each stator blade is with direction The circumferential other side and become larger.

8. pressure fan according to claim 2, which is characterized in that

The lower end surface of 2nd stator blade is and axially vertical plane.

9. pressure fan according to claim 2, which is characterized in that

The lower end of 1st one end face is identical as the axial position of lower end of the 2nd one end face,

The lower end and the described 2nd one of an end face for the stator blade adjacent with the circumferential side of the 2nd stator blade Circumferential distance between the lower end of end face is than between the lower end of the 1st one end face and the lower end of the 2nd one end face Circumferential distance it is small.

10. pressure fan according to claim 2, which is characterized in that

The lower end of 1st stator blade is configured at the position more against the top than the lower end of the 2nd stator blade.

11. pressure fan according to claim 1 or 2, which is characterized in that

The extension is the fixed part of the fixed motor cover and the blower casing.

12. pressure fan according to claim 1 or 2, which is characterized in that

The extension is to extend in the lower section of the blower casing from the motor to radial outside and connect the motor With the interconnecting piece of external component.