CN203685623U - Blower - Google Patents
Blower Download PDFInfo
- Publication number
- CN203685623U CN203685623U CN201420030801.8U CN201420030801U CN203685623U CN 203685623 U CN203685623 U CN 203685623U CN 201420030801 U CN201420030801 U CN 201420030801U CN 203685623 U CN203685623 U CN 203685623U
- Authority
- CN
- China
- Prior art keywords
- spoke
- impeller
- gas fan
- sense
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005034 decoration Methods 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims abstract description 44
- 230000001681 protective effect Effects 0.000 claims description 38
- 241000278713 Theora Species 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 8
- 238000003466 welding Methods 0.000 description 8
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 210000002683 foot Anatomy 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a blower provided with a motor, an outer motor cover, an impeller and a protecting device. The motor rotates with the central axis extending in the front and back direction as the center, the outer motor cover covers the motor, the impeller is arranged in front of the outer motor cover and fixed to an output shaft of the motor, and the protecting device stores the impeller. The impeller is provided with a cup portion located in the center of the impeller, and a plurality of vanes arranged along the radial outer side of the cup portion in the circumferential direction. The protecting device is provided with a peripheral ring surrounding the radial outer side of the impeller in an annular mode, a decoration object arranged in front of the impeller, and a plurality of front spokes which are arranged in the peripheral direction and connect the decoration object and the peripheral ring. When being observed from the front of the axial direction, the front spokes extend in an inclined mode relative to the radial direction, and therefore lowering of the strength of the front spokes can be restrained.
Description
Technical field
The utility model relates to a kind of gas fan.
Background technique
In the past, gas fan, the fans that particularly use in family etc. etc., in order to prevent that user from contact with the blade of rotation, have the protective equipment around encirclement blade.For example in TOHKEMY 2011-74881 communique, record the fan in the past with protective equipment.Protective equipment in this communique is made up of the multiple wires that are radial configuration.And the each wire in this communique is welded in the frame (0020 section) of ring-type.
As recorded in TOHKEMY 2011-074811 communique, if will be configuration radially for the spoke of multiple wires, during from forward observation, the bearing of trend of spoke and the sense of rotation of blade are orthogonal.Therefore,, in the time of vane rotary, the wind noise producing because of spoke becomes large.In the past, do not considered the design of the spoke of such wind noise factor.
But spoke is set to complicated curved shape if consider wind noise factor, the intensity of spoke declines.Therefore, have because the distortion of spoke causes wind noise on the contrary and become large worry.And if spoke distortion, the gap between adjacent spoke expands partly, also likely produces potential safety hazard.
The purpose of this utility model is to provide a kind of gas fan that can reduce the wind noise producing because of spoke and the intensity that can suppress spoke decline.
Model utility content
About the related exemplary gas fan of first aspect of the present utility model, it has: motor, and it rotates centered by the central axis extending along fore-and-aft direction; Motor housing, it covers described motor; Impeller, it is positioned at the front of described motor housing, and is fixed on the output shaft of described motor; And protective equipment, it holds described impeller, and described impeller has: cup portion, it is positioned at the central authorities of described impeller; And multiple blades, its radial outside in described cup portion is along circumferential array, and described protective equipment has: peripheral ring, it surrounds the radial outside of described impeller in the form of a ring; Decoration, it is positioned at the front of described impeller; And multiple fronts spoke, it is connected with described peripheral ring along circumferential array and by described decoration, described gas fan is characterised in that, during from axial forward observation, multiple described fronts spoke is with respect to radial skew ground and be roughly and extend straight line shape, and at least a portion of multiple described fronts spoke is crossing with the sense of rotation trailing edge of described blade.
About the related exemplary gas fan of second aspect of the present utility model, on the basis of the related exemplary gas fan of first aspect, during from axial forward observation, the peripheral part of described decoration is positioned at the position by radial outside than the peripheral part of the described cup portion of described impeller, and the end of the radially inner side of multiple described fronts spoke is welded in respectively described decoration.
About the related exemplary gas fan of the third aspect of the present utility model, on the basis of the related exemplary gas fan of second aspect, the number of described front spoke is made as to Nf, the rugosity of the described front spoke when from axial forward observation is made as Wf, the little angle in ratio right angle that the outer circumferential face of described decoration is become with described front spoke is made as α f, the radius of described cup portion is made as to Ro, the radius of described decoration is made as to Rf, minimum range between adjacent described front spoke is made as to Lf, meets:
Lf≈（2π·Rf－Wf·Nf／sinαf）sinαf／Nf≥（2π·Ro－Wf·Nf）／Nf。
About the related exemplary gas fan of fourth aspect of the present utility model, on the basis of the related exemplary gas fan of the third aspect, will be from axial forward observation time, the tangent line of the described cup portion at the connection part place between the sense of rotation leading edge of described blade and described cup portion is made as Ri with the intersection point of the sense of rotation trailing edge of described blade apart from the distance of described central axis, meets:
Rf＜Ri。
About the related exemplary gas fan in the 5th aspect of the present utility model, on the basis of the related exemplary gas fan of first aspect, during from axial forward observation, all described fronts spoke is crossing with the sense of rotation trailing edge of described blade.
About the related exemplary gas fan in the 6th aspect of the present utility model, on the basis of the related exemplary gas fan of either side in aspect first aspect to the five, described protective equipment also has multiple rears spoke, multiple described rears spoke is connected with described peripheral ring along circumferential array and by described motor housing, while observation from axial rearward direction, multiple described rears spoke is with respect to radial skew ground and be roughly and extend straight line shape, and at least a portion of multiple described rears spoke is crossing with the sense of rotation leading edge of described blade.
About the related exemplary gas fan in the 7th aspect of the present utility model, on the basis of exemplary gas fan related aspect the 6th, while observation from axial rearward direction, the peripheral part of described motor housing is positioned at the position by radial outside than the peripheral part of the described cup portion of described impeller, and the end of the radially inner side of multiple described rears spoke is welded in respectively described motor housing.
About the related exemplary gas fan of eight aspect of the present utility model, on the basis of exemplary gas fan related aspect the 7th, the number of described rear spoke is made as to Nr, the rugosity of the described rear spoke when observing from axial rearward direction is made as Wr, the little angle in ratio right angle that the outer circumferential face of described motor housing is become with described rear spoke is made as α r, the radius of described cup portion is made as to Ro, the radius of described motor housing is made as to Rr, the minimum range of adjacent described rear spoke is made as to Lr, meets:
Lr≈（2π·Rr－Wr·Nr／sinαr）sinαr／Nr≥（2π·Ro－Wr·Nr）／Nr。
About the related exemplary gas fan in the 9th aspect of the present utility model, on the basis of exemplary gas fan related aspect the 6th, during from axial forward observation, multiple described fronts spoke and multiple described rears spoke are with respect to radially tilting towards identical direction.
About the related exemplary gas fan in the tenth aspect of the present utility model, on the basis of exemplary gas fan related aspect the 9th, the sense of rotation trailing edge of described blade obtains greatly with respect to radial skew than the sense of rotation leading edge of described blade, and described rear spoke obtains greatly with respect to radial skew than described front spoke.
About the related exemplary gas fan of the tenth one side of the present utility model, on the basis of exemplary gas fan related aspect the 6th, while observation from axial rearward direction, all described rears spoke is crossing with the sense of rotation leading edge of described blade.
About the related exemplary gas fan in the 12 aspect of the present utility model, on the basis of exemplary gas fan related aspect the 6th, described front spoke is roughly the same with respect to the relative angle of the sense of rotation leading edge of described blade with respect to relative angle and the described rear spoke of the sense of rotation trailing edge of described blade.
About the related exemplary gas fan of the tenth three aspects: of the present utility model, on the basis of the related exemplary gas fan of either side in aspect first to the 5th, at the fixing described front of the face spoke of the axial rearward direction side of described decoration.
About the related exemplary gas fan in the 14 aspect of the present utility model, on the basis of the related exemplary gas fan of either side in aspect first to the 5th, described decoration has the through hole connecting vertically, and the end of the radially inner side of described blade is positioned at the position by radially inner side than the ora terminalis of the radial outside of described through hole.
About the related exemplary gas fan in the 15 aspect of the present utility model, on the basis of the related exemplary gas fan of either side in aspect first to the 5th, described protective equipment also has: the inner side protective equipment portion of ring-type, and it forms the multiple openings that connect vertically around described motor housing; And multiple rears spoke, it is connected with described peripheral ring along circumferential array and by the peripheral part of described inner side protective equipment portion, and the minimum width of described opening is larger than the minimum width between adjacent described rear spoke.
About the related exemplary gas fan in the 16 aspect of the present utility model, on the basis of the related exemplary gas fan of either side in aspect first to the 5th, the axial distance between the axial forward end portion of described motor housing and the sense of rotation leading edge of described blade is longer than the axial distance between the axial rearward end portion of described decoration and the sense of rotation trailing edge of described blade.
About the related exemplary gas fan in the 17 aspect of the present utility model, on the basis of the related exemplary gas fan of either side in aspect first to the 5th, multiple described fronts spoke has: multiple outsides spoke, and it is along circumferentially configuring and the described peripheral ring central ring little with peripheral ring described in radius ratio being connected; And multiple inner sides spoke, it is connected with described decoration along circumferential array and by described central ring, and the number of described inner side spoke is fewer than the number of described outside spoke.
According to the illustrated first aspect of the application, by spoke spoke mode crossing with the sense of rotation trailing edge of blade in front when with respect to radial skew and from axial forward observation in front configured, can reduce the wind noise producing because of front spoke.And, while being set to from axial forward observation by each front spoke, being shaped as roughly straight line shape, the intensity that can suppress front spoke declines.
Brief description of the drawings
Fig. 1 is the plan view of fan.
Fig. 2 is the rear view of fan.
Fig. 3 is the sectional view of the fan observed from side.
Fig. 4 be from axial forward observation to the end of radially inner side of front spoke near figure.
Fig. 5 is the plan view that a part for protective equipment is dissectd to the fan of expression.
Fig. 6 is near the figure end of radially inner side of the rear spoke observed from axial rearward direction.
Fig. 7 is the plan view of the related fan of variation.
Fig. 8 is the rear view of the related fan of variation.
Fig. 9 is the plan view of the related fan of variation.
Label declaration
1,1A, 1B, 1C fan
9 central axis
10 motors
11 output shafts
20,20B motor housing
21 housing section
22 rear frames
30 foots
31 base parts
32 pillars
40 impellers
41 glasss of portions
42,42A, 42C blade
50 protective equipments
51,51B, 51C peripheral ring
52,52A, 52C decoration
53,53C front spoke
54,54B rear spoke
Protective equipment portion inside 55B
56B opening
57C central ring
61 front frames
62,62A plate
421 sense of rotation leading edges
422 sense of rotation trailing edges
Spoke outside 531C
Spoke inside 532C
621A through hole
Embodiment
Below, with reference to accompanying drawing, the illustrated mode of execution of the utility model is described.In addition, in this application, respectively the direction parallel with the central axis of motor is called to " axially ", by being called " radially " with the orthogonal direction of the central axis of motor, the direction of the circular arc along centered by the central axis of motor is called to " circumferentially ".And, in this application, taking axially as fore-and-aft direction, shape and the position relationship of each several part is described taking impeller side as front side with respect to motor.But, to the definition of fore-and-aft direction be not intention limit the related gas fan of the utility model in use towards.
<1. the overall structure > of fan
Fig. 1 is the plan view of the related fan 1 of a mode of execution of the related gas fan of the utility model.Fig. 2 is the rear view of fan 1.Fig. 3 is the sectional view of the fan 1 observed from side.Thereby this fan 1 is for utilizing the power of motor 10 to make impeller 40 rotate the forwards device of air-supply.The ground that fan 1 is for example placed on family is used for allowing user nice and cool.As shown in Figure 1 to Figure 3, the fan 1 of present embodiment has motor 10, motor housing 20, foot 30, impeller 40 and protective equipment 50.
In the present embodiment, motor 10 uses Brushless DC motor.Brushless DC motor is due to the shortcoming that does not cause performance to worsen because of the wearing and tearing of brush, therefore than the long service life of brush motor.And Brushless DC motor is than the easy speed change of alternating current motor and easily reduce power consumption.But, also can replace Brushless DC motor and use brush motor or alternating current motor.
The resin component that the impeller 40 of present embodiment is the monomer that obtains by molding and forming.But impeller 40 also can be made up of multiple parts.For example, cup portion 41 and multiple blades 42 also can be the parts of mutual split.And impeller 40 also can be formed by the material except resin.
Multiple fronts spoke 53 is circumferentially equally spaced arranged on the radial outside edge of decoration 52.Multiple fronts spoke 53 is connected the front frame 61 of decoration 52 respectively with peripheral ring 51.In the groove 613 of embedding front, the end frame 61 of the radially inner side of each front spoke 53 and be welded in front frame 61.And the end of the radial outside of each front spoke 53 is welded in peripheral ring 51.
In the present embodiment, the welding part between described spoke 53 and front frame 61 is covered by plate 62.Therefore,, during from axial forward observation, the welding part between front spoke 53 and front frame 61 is hidden by plate 62.Thus, improved the aesthetic property of fan 1.
Multiple rears spoke 54 is circumferentially equally spaced arranged on the radial outside edge of motor housing 20.Multiple rears spoke 54 is connected the rear frame 22 of motor housing 20 respectively with peripheral ring 51.Representing as amplified in Fig. 3, rear frame 22 has multiple grooves 221.Each groove 221 caves in towards front from the ear end face of rear frame 22.In this groove 221 of embedding rear, the end frame 22 of the radially inner side of each rear spoke 54 and be welded in rear frame 22.And the end of the radial outside of rear spoke 54 is welded in peripheral ring 51.
In said fans 1, in the time providing driving current to motor 10, the output shaft 11 of motor 10 and the impeller 40 that is fixed on output shaft 11 rotate centered by central axis 9.Thus, gas is accelerated by multiple blades 42, produces from rear towards the air-flow in front around impeller 40.That is to say, the gas at the rear of protective equipment 50 attracted in protective equipment 50 by the gap between multiple rears spoke 54.And the gas in protective equipment 50 is discharged to the front of protective equipment 50 by the gap between multiple fronts spoke 53.
Here as shown in Figure 3, the axial distance between the axial forward end portion of motor housing 20 and the sense of rotation leading edge 421 of blade 42 is made as to Dr.And, the axial distance between the axial rearward end portion of decoration 52 and the sense of rotation trailing edge 422 of blade 42 is made as to Df.In the present embodiment, meet Dr>Df.Thus, in protective equipment 50, by by the rear space expansion of blade 42 wider than the front space of blade 42, the noise can reduce fan 1 and drive time.
<2. about front spoke and rear spoke >
Next, front spoke 53 and the more detailed structure of rear spoke 54 are described.
As shown in Figure 1, in this fan 1, during from axial forward observation, multiple fronts spoke 53 be not be radial but with respect to radial skew extend.And at least a portion of multiple fronts spoke 53 is crossing with the sense of rotation trailing edge 422 of impeller 42.Therefore the air-flow, being produced by blade 42 towards and the bearing of trend of front spoke 53 between relative angle diminish.Therefore the air-flow, being produced by blade 42 contacts lenitively with front spoke 53.Consequently, reduced the wind noise producing because of front spoke 53.
In addition, in the example of Fig. 1, at impeller 40, under static state, during from axial forward observation, in multiple fronts spoke 53, only some front spoke 53 is crossing with the sense of rotation trailing edge 422 of blade 42.But also, at impeller 40, under static state, during from axial forward observation, all front spokes 53 are crossing with the sense of rotation trailing edge 422 of blade 42.Thus, can further reduce the wind noise producing because of front spoke 53.
And in this fan 1, during from axial forward observation, multiple fronts spoke 53 is roughly and extends straight line shape.Therefore, when from axial forward observation described in being shaped as compared with curvilinear situation of spoke 53, can improve the intensity of front spoke 53.Thus, having suppressed front spoke 53 is out of shape.Consequently, can prevent from causing wind noise to become large because front spoke 53 is out of shape.
Here, if by front spoke 53 with respect to radial skew configure,, compared with front spoke 53 being radially to the situation of configuration, the interval between the end of the radially inner side of adjacent front spoke 53 is narrow.But in the present embodiment, during from axial forward observation, the peripheral part of decoration 52 is positioned at the position by radial outside than the peripheral part of the cup portion 41 of impeller 40.That is to say, as shown in Figure 3, the radius R f of decoration 52 is larger than the radius R o of cup portion 41.Thus, if the radius R f of decoration 52 is become to large, the welding part between front frame 61 and front spoke 53 can be configured in to the position near radial outside.Therefore, can by front spoke 53 with respect to radial skew configure, and interval between adjacent welding part can be expanded.Consequently, can easily multiple fronts spoke 53 be welded in to front frame 61.
Fig. 4 be from axial forward observation to the end of radially inner side of front spoke 53 near figure.As shown in Figure 4, the rugosity of the front spoke 53 when from axial forward observation is made as Wf, and the angle that the outer circumferential face of decoration 52 is little with the ratio right angle of 53 one-tenth of front spokes is made as α f.And the number of the front spoke 53 that protective equipment 50 is had is made as Nf.Thus, can represent the minimum range Lf between adjacent front spoke 53 by following formula:
Ｌf≈（2π·Rf－Wf·Nf／sinαf）sinαf／Nf。
On the other hand, as a comparative example, considered following situation: decoration 52 has the radius R o identical with the cup portion 41 of impeller 40, and front spoke 53 is radially and extends with respect to central axis 9.In this comparative example, the minimum range Lfo between adjacent front spoke 53 represents by following formula:
Ｌfo≈（2π·Ro－Wf·Nf）／Nf。
In the present embodiment, meet Lf >=Lfo.That is to say, meet following formula:
Ｌf≈（2π·Rf－Wf·Nf／sinαf）sinαf／Nf≥（2π·Ro－Wf·Nf）／Nf。
This shows: have the radius R o identical with the cup portion 41 of impeller 40 and front spoke 53 with decoration 52 and be with respect to central axis 9 compared with the situation of extending radially, the minimum range Lfo between the minimum range Lf between the adjacent front spoke 53 in present embodiment and the front spoke 53 in comparative example equates or is more than the minimum range Lfo between the front spoke 53 in comparative example.Therefore,, if meet above-mentioned inequality, multiple fronts spoke 53 can be welded in more easily to the front frame 61 of decoration 52.
But if the radius R f of decoration 52 is established too much, it is large that the wind loss causing because of decoration 52 becomes.Therefore, preferably the radius R f of decoration 52 is controlled to a certain degree in scope.Specifically, be set as follows suitable.
Fig. 5 is the plan view that a part for protective equipment 50 is dissectd to the fan 1 of expression.As shown in Figure 5, will be from axial forward observation time, the tangent line 91 of the cup portion 41 at the connection part place between sense of rotation leading edge 421 and the cup portion 41 of blade 42 be made as P with the intersection point between the sense of rotation trailing edge 422 of blade 42.Less by producing the function of air-flow compared with the part of radially inner side and the part of radial outside than intersection point P in blade 42.Therefore, even cover by the decorated thing 52 in region of radially inner side than intersection point P, also less on the impact of air quantity.Therefore,, if the radius R o of decoration 52 is made as than little to the distance R i of intersection point P from central axis 9, can suppress the wind loss causing because of decoration 52.
Return to Fig. 2.In this fan 1, while observation from axial rearward direction, multiple rears spoke 54 is not radially yet and extends, but with respect to radial skew extend.And at least a portion of multiple rears spoke 54 is crossing with the sense of rotation leading edge 421 of blade 42.Therefore, from the rear of protective equipment 50 towards the air-flow of blade 42 towards and the bearing of trend of rear spoke 54 between relative angle diminish.Therefore, contact lenitively with rear spoke 54 towards the air-flow of blade 42 from the rear of protective equipment 50.Consequently, reduced the wind noise producing because of rear spoke 54.
In addition, in the example of Fig. 1, at impeller 40, under static state, while observation from axial rearward direction, in multiple rears spoke 54, only some rear spoke 54 is crossing with the sense of rotation leading edge 421 of impeller 42.But, can be also that under static state, while observation from axial rearward direction, all rear spoke 54 is crossing with the sense of rotation leading edge 421 of impeller 42 at impeller 40.Thus, can further reduce the wind noise producing because of rear spoke 54.
And in this fan 1, while observation from axial rearward direction, multiple rears spoke 54 is roughly and extends straight line shape.Therefore, being shaped as compared with curvilinear situation of rear spoke 54 when observing from axial rearward direction, can improve the intensity of rear spoke 54.Thus, having suppressed rear spoke 54 is out of shape.Consequently, can prevent from causing wind noise to become large because rear spoke 54 is out of shape.
Here, if by rear spoke 54 with respect to radial skew configure,, compared with rear spoke 54 being radially to the situation of configuration, the interval between the end of the radially inner side of adjacent rear spoke 54 is narrow.But in the present embodiment, while observation from axial rearward direction, the peripheral part of motor housing 20 is positioned at the position by radial outside than the peripheral part of the cup portion 41 of impeller 40.That is to say, as shown in Figure 3, the radius R r of motor housing 20 is larger than the radius R o of cup portion 41.Thus, if the radius R r of motor housing 20 is become to large, the welding part between rear frame 22 and rear spoke 54 can be configured in to the position near radial outside.Therefore, can by rear spoke 54 with respect to radial skew configure, and, interval between adjacent welding part can be expanded.Consequently, can easily multiple rears spoke 54 be welded in to rear frame 22.
Fig. 6 is near the figure end of radially inner side of the rear spoke 54 observed from axial rearward direction.As shown in Figure 6, the rugosity setting of the rear spoke 54 when observing from axial rearward direction is made as Wr, and the little angle in ratio right angle becoming between the outer circumferential face of motor housing 20 and rear spoke 54 is made as to α r.And the number of the rear spoke 54 that protective equipment 50 is had is made as Nr.Thus, represent the minimum range Lr between adjacent rear spoke 54 by following formula:
Ｌr≈（2π·Rr－Wr·Nr／sinαr）sinαr／Nr。
On the other hand, as a comparative example, considered following situation: motor housing 20 has the radius R o identical with the cup portion 41 of impeller 40, and rear spoke 54 is radially and extends with respect to central axis 9.In this comparative example, the minimum range Lro between adjacent rear spoke 54 represents by following formula:
Ｌro≈（2π·Ro－Wr·Nr）／Nr。
In the present embodiment, meet Lr >=Lro.That is to say, meet following formula:
Ｌr≈（2π·Rr－Wr·Nr／sinαr）sinαr／Nr≥（2π·Ro－Wr·Nr）／Nr。
This shows: have the radius R o identical with the cup portion 41 of impeller 40 and rear spoke 54 with motor housing 20 and be with respect to central axis 9 compared with the situation of extending radially, the minimum range Lro between the adjacent rear spoke 54 in minimum range Lr and comparative example between the adjacent rear spoke 54 in present embodiment equates or is more than the minimum range Lro between the adjacent rear spoke 54 in comparative example.Therefore,, if meet above-mentioned inequality, can more easily multiple rears spoke 54 be welded in to the rear frame 22 of motor housing 20.
In addition, in this fan 1, during from axial forward observation, front spoke 53 and rear spoke 54 are with respect to radially tilting towards identical direction.Preferably according to the angle of inclination towards setting front spoke 53 of the sense of rotation trailing edge 422 of blade 42.And, preferably according to the angle of inclination towards setting rear spoke 54 of the sense of rotation leading edge 421 of blade 42.Therefore, for example, in the case of the sense of rotation trailing edge 422 of blade 42 obtains greatly than the sense of rotation leading edge 421 of blade 42 with respect to radial skew, so that rear spoke 54 is arranged to obtain greatly and be advisable with respect to radial skew than front spoke 53.Particularly, preferably front spoke 53 is roughly the same with respect to the relative angle of the sense of rotation leading edge 421 of blade 42 with respect to relative angle and the rear spoke 54 of the sense of rotation trailing edge 422 of blade 42.Thus, can be by suitably setting respectively the angle of inclination of front spoke 53 and rear spoke 54, further reduce efficiently the wind noise producing because of each spoke 53,54.
<3. variation >
Above the illustrated mode of execution of the utility model is illustrated, but the utility model is not limited to above-mentioned mode of execution.
Fig. 7 is the plan view of the related fan 1A of a variation.In the example of Fig. 7, be provided with multiple through hole 621A at the plate 62A of decoration 52A.For example, as shown in Figure 7, multiple through hole 621A configure in the form of a ring along the peripheral part of plate 62A.But the arranging method of multiple through hole 621A is not defined as ring-type.Each through hole 621A run-through board 62A vertically.And the end of the radially inner side of blade 42A is positioned at the position by radially inner side than the ora terminalis of the radial outside of through hole 621A.Thus, a part for the air-flow being produced by blade 42A is discharged towards front by through hole 621A.Therefore, can suppress to reduce because decoration 52A causes air quantity.
Fig. 8 is the rear view of the related fan 1B of other variation.In the example of Fig. 8, between spoke 54B and motor housing 20B, be provided with in the wings the inner side 55B of protective equipment portion.The inner side 55B of protective equipment portion is by radially and circumferentially configuring the many wires identical with rear spoke 54B to form.By this inner side 55B of protective equipment portion around motor housing 20B the multiple opening 56B of formation.And the peripheral part of the 55B of inner side protective equipment portion is connected by multiple rear spoke 54B with peripheral ring 51B.
In the example of Fig. 8, the minimum width of the opening 56B forming by the 55B of inner side protective equipment portion is larger than the minimum width between adjacent rear spoke 54B.Thus, can improve the gettering efficiency in protective equipment 50B from axial rearward direction.
Fig. 9 is the plan view of the related fan 1C of other variation.In the example of Fig. 9, between peripheral ring 51C and decoration 52C, be provided with the central ring 57C being made of metal that radius ratio peripheral ring 51C is little.And multiple front spoke 53C comprise multiple outside spoke 531C and multiple inner side spoke 532C.Multiple outside spoke 531C are leaning on the position of radial outside along circumferential array than central ring 57C.Each outside spoke 531C is connected peripheral ring 51C with central ring 57C.Inner side spoke 532C is leaning on the position of radially inner side along circumferential array than central ring 57C.Each inner side spoke 532C is connected central ring 57C with decoration 52C.The end of radially inner side of outside spoke 531C and the end of the radial outside of inner side spoke 532C are welded in respectively central ring 57C.
Thus, can be by the Separation control between adjacent inner side spoke 532C below the size of safety standard defined, and number that can inner side spoke 532C is set to fewer than the number of the spoke 531C in outside.Therefore, can further reduce the wind noise causing because of inner side spoke 532C.And, can make near spoke 532C air quantity in inner side increase.And, the interval between the adjacent welding part of inner side spoke 532C can be expanded.Consequently, can easily weld in each welding part.
And as shown in Figure 9, if multiple front spoke 53C are arranged to the structure of two sections of outside spoke 531C and inner side spoke 532C, outside can making, the inclination of spoke 531C is different from the inclination of inner side spoke 532C.Therefore, can, according to the shape of the sense of rotation trailing edge 422C of blade 42C, respectively outside spoke 531C and inner side spoke 532C be arranged to most suitable angle.
And in the above-described embodiment, the each blade that uses impeller is along with towards radial outside and towards the what is called of the sense of rotation front bending blade that advances.But blade of the present utility model also can be each blade along with retreating blade towards radial outside towards the what is called of sense of rotation rear bending.In the situation that retreating blade, the true dip direction of front spoke and rear spoke also can be contrary with above-mentioned mode of execution.
And gas fan of the present utility model needn't a fan being decided to be for enjoying the cool.For example, also can be as the circulator for stirring indoor air.
And the shape that the shape of the detail section of each parts of formation gas fan also can be represented from each diagram of the application is different.And the each key element occurring in above-mentioned mode of execution or variation can be carried out appropriately combined in the scope that does not produce contradiction.
The utility model can be used in the gas fan such as fan or circulator.
Claims (17)
1. a gas fan, it has:
Motor, it rotates centered by the central axis extending along fore-and-aft direction;
Motor housing, it covers described motor;
Impeller, it is positioned at the front of described motor housing, and is fixed on the output shaft of described motor; And
Protective equipment, it holds described impeller,
Described impeller has:
Cup portion, it is positioned at the central authorities of described impeller; And
Multiple blades, its radial outside in described cup portion is along circumferential array,
Described protective equipment has:
Peripheral ring, it surrounds the radial outside of described impeller in the form of a ring;
Decoration, it is positioned at the front of described impeller; And
Multiple fronts spoke, it is connected with described peripheral ring along circumferential array and by described decoration,
Described gas fan is characterised in that,
During from axial forward observation, multiple described fronts spoke is with respect to radial skew ground and linearly extension, and at least a portion of multiple described fronts spoke is crossing with the sense of rotation trailing edge of described blade.
2. gas fan according to claim 1,
During from axial forward observation, the peripheral part of described decoration is positioned at the position by radial outside than the peripheral part of the described cup portion of described impeller,
The end of the radially inner side of multiple described fronts spoke is welded in respectively described decoration.
3. gas fan according to claim 2,
The number of described front spoke is made as to Nf,
The rugosity of the described front spoke when from axial forward observation is made as Wf,
The little angle in ratio right angle that the outer circumferential face of described decoration is become with described front spoke is made as α f,
The radius of described cup portion is made as to Ro,
The radius of described decoration is made as to Rf,
Minimum range between adjacent described front spoke is made as to Lf,
Meet:
Ｌf≈（2π·Rf－Wf·Nf／sinαf）sinαf／Nf≥（2π·Ro－Wf·Nf）／Nf。
4. gas fan according to claim 3,
Will be from axial forward observation time, the tangent line of the described cup portion at the connection part place between the sense of rotation leading edge of described blade and described cup portion be made as Ri with the intersection point of the sense of rotation trailing edge of described blade apart from the distance of described central axis, meets:
Rf＜Ri。
5. gas fan according to claim 1,
During from axial forward observation, all described fronts spoke is crossing with the sense of rotation trailing edge of described blade.
6. according to the gas fan described in any one in claim 1 to 5,
Described protective equipment also has multiple rears spoke, and multiple described rears spoke is connected with described peripheral ring along circumferential array and by described motor housing,
While observation from axial rearward direction, multiple described rears spoke is with respect to radial skew ground and linearly extension, and at least a portion of multiple described rears spoke is crossing with the sense of rotation leading edge of described blade.
7. gas fan according to claim 6,
While observation from axial rearward direction, the peripheral part of described motor housing is positioned at the position by radial outside than the peripheral part of the described cup portion of described impeller,
The end of the radially inner side of multiple described rears spoke is welded in respectively described motor housing.
8. gas fan according to claim 7,
The number of described rear spoke is made as to Nr,
The rugosity of the described rear spoke when observing from axial rearward direction is made as Wr,
The little angle in ratio right angle that the outer circumferential face of described motor housing is become with described rear spoke is made as α r,
The radius of described cup portion is made as to Ro,
The radius of described motor housing is made as to Rr,
The minimum range of adjacent described rear spoke is made as to Lr,
Meet:
Ｌr≈（2π·Rr－Wr·Nr／sinαr）sinαr／Nr≥（2π·Ro－Wr·Nr）／Nr。
9. gas fan according to claim 6,
During from axial forward observation, multiple described fronts spoke and multiple described rears spoke are with respect to radially tilting towards identical direction.
10. gas fan according to claim 9,
The sense of rotation trailing edge of described blade obtains greatly with respect to radial skew than the sense of rotation leading edge of described blade,
Described rear spoke obtains greatly with respect to radial skew than described front spoke.
11. gas fans according to claim 6,
While observation from axial rearward direction, all described rears spoke is crossing with the sense of rotation leading edge of described blade.
12. gas fans according to claim 6,
Described front spoke is identical with respect to the relative angle of the sense of rotation leading edge of described blade with described rear spoke with respect to the relative angle of the sense of rotation trailing edge of described blade.
13. according to the gas fan described in any one in claim 1 to 5,
At the fixing described front of face of the axial rearward direction side of described decoration spoke.
14. according to the gas fan described in any one in claim 1 to 5,
Described decoration has the through hole connecting vertically,
The end of the radially inner side of described blade is positioned at the position by radially inner side than the ora terminalis of the radial outside of described through hole.
15. according to the gas fan described in any one in claim 1 to 5,
Described protective equipment also has:
The inner side protective equipment portion of ring-type, it forms the multiple openings that connect vertically around described motor housing; And
Multiple rears spoke, it is connected with described peripheral ring along circumferential array and by the peripheral part of described inner side protective equipment portion,
The minimum width of described opening is larger than the minimum width between adjacent described rear spoke.
16. according to the gas fan described in any one in claim 1 to 5,
Axial distance between the axial forward end portion of described motor housing and the sense of rotation leading edge of described blade is longer than the axial distance between the axial rearward end portion of described decoration and the sense of rotation trailing edge of described blade.
17. according to the gas fan described in any one in claim 1 to 5,
Multiple described fronts spoke has:
Multiple outsides spoke, it is along circumferentially configuring and the described peripheral ring central ring little with peripheral ring described in radius ratio being connected; And
Multiple inner sides spoke, it is connected with described decoration along circumferential array and by described central ring,
The number of described inner side spoke is fewer than the number of described outside spoke.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-252581 | 2013-12-06 | ||
| JP2013252581A JP6287141B2 (en) | 2013-12-06 | 2013-12-06 | Blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203685623U true CN203685623U (en) | 2014-07-02 |
Family
ID=51007531
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410022495.8A Pending CN104696241A (en) | 2013-12-06 | 2014-01-17 | Blower |
| CN201420030801.8U Expired - Lifetime CN203685623U (en) | 2013-12-06 | 2014-01-17 | Blower |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410022495.8A Pending CN104696241A (en) | 2013-12-06 | 2014-01-17 | Blower |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6287141B2 (en) |
| CN (2) | CN104696241A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696241A (en) * | 2013-12-06 | 2015-06-10 | 日本电产株式会社 | Blower |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104921646A (en) * | 2015-06-30 | 2015-09-23 | 浙江艾克电器有限公司 | Hand dryer |
| CN207992136U (en) * | 2017-05-31 | 2018-10-19 | 广东美的环境电器制造有限公司 | Air detection instrument and air purifier |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4845953U (en) * | 1971-09-29 | 1973-06-15 | ||
| JPS5429862U (en) * | 1977-07-29 | 1979-02-27 | ||
| JPS62188592U (en) * | 1986-05-23 | 1987-12-01 | ||
| JPS62197796U (en) * | 1986-06-05 | 1987-12-16 | ||
| JPS63138194A (en) * | 1986-11-28 | 1988-06-10 | Matsushita Seiko Co Ltd | Guard net for fan |
| JPS63243490A (en) * | 1987-03-31 | 1988-10-11 | Matsushita Seiko Co Ltd | Electric fan |
| JP3207379B2 (en) * | 1997-09-26 | 2001-09-10 | 松下電器産業株式会社 | Blower and molding method of housing |
| CN1171499A (en) * | 1997-08-19 | 1998-01-28 | 吴凤清 | Method for generating natural wind and electric fan of natural wind |
| CN2460758Y (en) * | 2000-09-04 | 2001-11-21 | 大金工业株式会社 | Fan Protection cover for blowing device |
| JP4427982B2 (en) * | 2003-06-26 | 2010-03-10 | 三菱電機株式会社 | Blower |
| JP4871189B2 (en) * | 2006-04-18 | 2012-02-08 | 山洋電気株式会社 | Axial blower |
| ITBO20070776A1 (en) * | 2007-11-23 | 2009-05-24 | Spal Automotive Srl | VENTILATION UNIT IN PARTICULAR FOR MOTOR VEHICLES. |
| US20130315727A1 (en) * | 2012-05-24 | 2013-11-28 | Edwin Ho | Stackable fan |
| JP6287141B2 (en) * | 2013-12-06 | 2018-03-07 | 日本電産株式会社 | Blower |
-
2013
- 2013-12-06 JP JP2013252581A patent/JP6287141B2/en active Active
-
2014
- 2014-01-17 CN CN201410022495.8A patent/CN104696241A/en active Pending
- 2014-01-17 CN CN201420030801.8U patent/CN203685623U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696241A (en) * | 2013-12-06 | 2015-06-10 | 日本电产株式会社 | Blower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104696241A (en) | 2015-06-10 |
| JP6287141B2 (en) | 2018-03-07 |
| JP2015108362A (en) | 2015-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9017011B2 (en) | Furnace air handler blower with enlarged backward curved impeller and associated method of use | |
| EP3147510B1 (en) | Coreless donut-type motor fan for ventilation and cooling | |
| US9127687B2 (en) | Centrifugal fan | |
| CN107532614A (en) | Centrifugal blower and dust catcher | |
| US9568015B2 (en) | Centrifugal fan | |
| CN100453822C (en) | Fan, motor and blade thereof | |
| JP2014058966A (en) | Fan module for heat exchanger | |
| CN101188373A (en) | Fan motor | |
| CN103052806A (en) | Blower assembly with motor integrated into the impeller fan and blower housing constructions | |
| US20180180063A1 (en) | Axial flow fan | |
| CN203685623U (en) | Blower | |
| JP2015095997A (en) | Motor | |
| US20120237373A1 (en) | Blower | |
| TW200713759A (en) | Cooling fan with an outer rotor motor | |
| CN105275881B (en) | Centrifugal fan | |
| US20130251559A1 (en) | Axial flow fan | |
| US20070264123A1 (en) | Counter-rotating fan | |
| JP2008115724A (en) | Blower | |
| JP6603448B2 (en) | Centrifugal impeller and centrifugal blower | |
| JP5907205B2 (en) | Blower | |
| JP2017218928A (en) | Impeller and fan with impeller | |
| JP2005127311A (en) | Centrifugal blower and air conditioner using it | |
| JP2015028341A (en) | Motor-driven centrifugal blower, and vacuum cleaner using the same | |
| JP6588999B2 (en) | Centrifugal fan | |
| JP2019206916A (en) | Centrifugal air blower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |