CN110513327A - Diagonal flow fan and household appliance - Google Patents
Diagonal flow fan and household appliance Download PDFInfo
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- CN110513327A CN110513327A CN201810497062.6A CN201810497062A CN110513327A CN 110513327 A CN110513327 A CN 110513327A CN 201810497062 A CN201810497062 A CN 201810497062A CN 110513327 A CN110513327 A CN 110513327A
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- wheel
- flow
- pipeline section
- wheel cap
- flow fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention proposes a kind of diagonal flow fan and household appliances, wherein, diagonal flow fan includes: wheel cap assemblies, including multiple wheel caps being arranged, wheel cap offers air inlet, wheel cap in two wheel caps of arbitrary neighborhood in outside downstream extends relative to the wheel cap in inside, and to form return flow line between the two of arbitrary neighborhood wheel cap, return flow line is connected to air inlet；Oblique flow wind wheel is partially set to the inside of the most inner side wheel cap in multiple wheel caps, and diagonal flow fan includes wheel hub and multiple blades arranged on the hub, and the top of blade can be simultaneously correspondingly arranged with the entrance of return flow line.According to the technical solution of the present invention, the stability of diagonal flow fan operation is improved, improves the aeroperformance of diagonal flow fan, while reducing the increased probability of leaf frequency multiplication noise.
Description
Technical field
The present invention relates to household appliances fields, in particular to a kind of diagonal flow fan and a kind of household appliance.
Background technique
Diagonal flow fan is also known as flow-mixing blower fan, is a kind of blower between centrifugal blower and axial flow blower, this kind of wind
The characteristics of there is machine pressure at expulsion to be higher than axial flow blower, and efficiency is higher than centrifugal blower, was increasingly being application, phase in recent years
In the technology of pass, the structure of diagonal flow fan is as shown in Figures 1 and 2, and there are still following defects in the process of running:
Under the more wide operating condition of flow use scope, in diagonal flow fan vane tip, the position close to outlet is easy
There is the phenomenon that flow separation even backflow phenomenon, causes diagonal flow fan wider stall zone occur, showed on performance curve
For the much like hump characteristic of axial flow blower, i.e., unstable characteristic curve.
Differential pressure under the operating condition of small flow, since the differential pressure between the pressure face and suction surface of impeller is larger, in two sides
With occur stronger blade tip leakage vortex under the comprehensive function of undercurrent, form a large amount of low energy fluid on leaf top, and work as diagonal flow fan
Flow-reduction to a certain degree after, it can be observed that there is the recirculating zone of large area in the region Ye Ding, the interior flow field of impeller at this time
Fluctuate, diagonal flow fan caused to occur the case where fluctuation of service in the application, minimum pressure oscillation cause flow compared with
Great fluctuation process, aeroperformance and noise performance to diagonal flow fan generate large effect, and the low energy fluid subsequently enters expansion
After depressor and diffuser vane generates interference, also leads to occur the case where leaf frequency multiplication noise increase while stall.
Summary of the invention
At least one in order to solve the above-mentioned technical problem, it is an object of the present invention to provide a kind of diagonal flow fans.
It is another object of the present invention to provide a kind of household appliances.
To achieve the goals above, the embodiment of first aspect present invention proposes a kind of diagonal flow fan, comprising: wheel cap group
Part, including multiple wheel caps being arranged, wheel cap offers air inlet, and the wheel cap in outside is opposite in two wheel caps of arbitrary neighborhood
Downstream extend in the wheel cap of inside, to form return flow line between the two of arbitrary neighborhood wheel cap, return flow line with
Air inlet connection；Oblique flow wind wheel, is partially set to the inside of the most inner side wheel cap in multiple wheel caps, diagonal flow fan include wheel hub with
And multiple blades arranged on the hub, the top of blade can be simultaneously correspondingly arranged with the entrance of return flow line.
In the technical scheme, by setting multiple wheel caps being arranged for the fan shroud of diagonal flow fan, wheel cap from outside to
Length in the axial direction of inherent blower is gradually reduced, so that the wheel cap of inside is completely in the inside of the wheel cap in outside, Jin Erneng
Enough to form circumferential return flow line between two adjacent wheel caps, the blade on oblique flow wind wheel is at least partially in nearside wheel
The inside of lid forms a large amount of low speed flow at the leaf top of blade, by passing through low speed flow in the rotation of oblique flow wind wheel
The return flow line formed between wheel cap returns to the region of air inlet, low after preventing the flow in blower from dropping to a certain degree
The reflux that fast air-flow generates, forms flow-disturbing between the air-flow of entrance, causes the flow field of the inside of wind wheel to be fluctuated, Jin Erti
The stability for having risen diagonal flow fan operation, improves the aeroperformance of diagonal flow fan, while it is increased to reduce leaf frequency multiplication noise
Probability.
Preferably, the quantity of wheel cap is 2.
In addition, the diagonal flow fan in above-described embodiment provided by the invention can also have following additional technical feature:
In the above-mentioned technical solutions, it is preferable that the outermost wheel cover rim airflow direction being set in multiple wheel caps successively wraps
The first pipeline section, the second pipeline section and third pipeline section interconnected are included, one end of the first pipeline section offers air inlet, wherein first
For the diameter of pipeline section less than the diameter of the second pipeline section, it is curved with bending inwardly that the second pipeline section successively includes straight pipe along airflow direction
Broken pipe section, third pipeline section are configured to the taper pipeline section being adapted to the back segment of oblique flow wind wheel, one end connection of taper pipeline section
To bending pipeline section；The tail end of the inside wheel cap adjacent with outermost wheel cap is correspondingly arranged with bending pipeline section, and tail end and bending
The slotted inlets of pipeline section formation return flow line.
In the technical scheme, by limiting the structure of outermost wheel cap, by suitable between the back segment of oblique flow wind wheel
Match, make to form Meridian Passage between outermost wheel cap and the top of blade, reflux can be formed between adjacent inside wheel cap
The top of the vane tip of oblique flow wind wheel is arranged in the slotted inlets in channel, slotted inlets, so as to make in rotary course
The low energy air-flow of generation enters return flow line by slotted inlets, to reduce the probability of flow separation phenomenon generation, in turn
Promote the stability of diagonal flow fan operation.
In any of the above-described technical solution, it is preferable that the quantity of multiple wheel caps being arranged is 2, and most inner side wheel cap is arranged
In the second pipeline section；The outer diameter of most inner side wheel cap is gradually increased along airflow direction, so that the inner sidewall and most inner side of the second pipeline section
The return flow line gradually expanded is formed between the lateral wall of wheel cap；The inside of most inner side wheel cap successively includes mutual along airflow direction
The dilution zone of connection, straight tube flow region corresponding with air inlet and the oblique flow area being adapted to the front end of oblique flow wind wheel, dilution zone
Side wall along airflow direction to middle part tilt, wherein low speed flow flows into dilution zone by return flow line.
In the technical scheme, when diagonal flow fan works, radial differential pressure is formed in Meridian Passage, air-flow velocity gradually
When reducing and entering stall zone, pressure difference increases, and close to the region low regime easy to form in downstream or returns at the top of blade at this time
Flow area, after opening up return flow line, air-flow can slit two sides two sides between nearside wheel lid and outside wheel cap form pressure difference
Gradient, so as to make low energy air-flow export to by slotted inlets the air inlet of diagonal flow fan, with enter dilution zone with from outer
Portion enter air inlet blend after, diagonal flow fan is reentered, since low energy air-flow is sucked up to air inlet, to limit
In the low regime at the top of blade and the Forming Mechanism of recirculating zone, it can effectively inhibit the boundary layer hair close to the top of blade
Exhibition, and the generation of flow separation is controlled, therefore the flow condition in oblique flow wind wheel can significantly improve, and in small stream
Exit static pressure within the scope of amount area and stall zone can also correspondingly increase.
In any of the above-described technical solution, it is preferable that it is in office one by diagonal flow fan axis section on, dilution zone with
The tie point of straight tube flow region is set to the up-front upstream of blade.
In the technical scheme, by the way that the up-front of blade is arranged in the tie point blended between region straight tube flow region
Upstream, the air-flow that low energy air-flow can be enable to enter with outside sufficiently blend, to enter oblique flow wind wheel after blending, without
It is that low energy air-flow is importing directly into oblique flow wind wheel, to promote air-flow flow efficiency.
In any of the above-described technical solution, it is preferable that be determined as the tilt angle of the side wall of dilution zone to blend angle, blending
Angle is greater than 0 °, and is less than or equal to 30 °.
In the technical scheme, the range at angle is blended by limiting, on the one hand, can make reflux gas smooth from air inlet
Into on the other hand, the air-flow for also ensuring that low energy air-flow enters with outside can be blended sufficiently, and then be reduced in oblique flow wind wheel
There is the probability fluctuated in portion.
In any of the above-described technical solution, it is preferable that the entrance for bending slotted inlets on pipeline section is determined as low energy gas
The suction point of stream, the ratio in airflow direction, between the front end length of blade and vane overall length degree of the blade before suction point
Value is greater than or equal to 0.4, and is less than or equal to 0.7.
In the technical scheme, since low energy air-flow compares concentration in the region of above-mentioned restriction, to be taken out by limiting
Inhale the position of point, promote return flow line to the efficiency of the suction of low energy air-flow, so realize to the starting performance of diagonal flow fan with
The optimization of noise performance.
In any of the above-described technical solution, it is preferable that be determined as taper pipeline section and the angle of the junction of bending pipeline section
Angle is aspirated, suction angle is greater than 90 °, and less than 180 °.
In the technical scheme, the tangential direction of taper pipeline section is the tangential direction of Meridian Passage, and suction angle is then to cut
Angle between line direction and the inner wall for bending pipeline section is conducive to promote low energy air-flow by limiting the angular range at suction angle
Reflux efficiency.
In any of the above-described technical solution, it is preferable that the width in gap and slotted inlets between the top and wheel cap of blade
Ratio between degree is more than or equal to 0.9, and is less than or equal to 1.1.
In the technical scheme, the relief width by setting the width of slotted inlets between the top of blade and wheel cap
Degree is close, on the one hand, too small gap influence reflux efficiency, on the other hand, the excessive width that cracks also results in returning for air
Flow is excessive, influences the operational efficiency of diagonal flow fan.
In any of the above-described technical solution, it is preferable that further include: vane diffuser is set to the downstream of oblique flow wind wheel, leaf
Piece diffuser includes diffuser ontology, and the multiple diffusion blades being set on diffuser ontology, and multiple diffusion blades are along week
To being laid on diffuser ontology, diffusion channel is formed between two adjacent diffusion blades.
In the technical scheme, wheel cap assemblies may include the inside wheel cap that is arranged and outside wheel cap, inside wheel cap it is interior
Air intake passage is formed between wall and blade leading portion, is formed reflux between the inner wall of wheel cap on the outside of the outer wall and leading portion of inside wheel cap and is led to
Road, forms air inlet runner on the outside of back segment between wheel cap and blade rear end, the power of motor is converted into air pressure by oblique flow wind wheel
Energy and kinetic energy, vane diffuser have multiple diffusion blades, realize diffusion by the channel expansion design between adjacent blades
The kinetic energy for the fluid with higher momentum that impeller excludes is converted into pressure energy by function.
By the way that return flow line is arranged, low energy fluid has been further prevented to enter generation between diffuser and diffuser vane dry
It relates to, further decreases and the increased probability of leaf frequency multiplication noise occur in stall condition.
The embodiment of second aspect of the present invention proposes a kind of household appliance, the technical solution including first aspect present invention
Diagonal flow fan described in middle any embodiment.
Wherein, household appliance can be dust catcher or range hood.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
By using the assembling mode that inside and outside wheel cap is arranged, make to form return flow line between inside wheel cap and outside wheel cap,
Low energy air-flow at the top of impeller is inhaled into return flow line, is blended with being back to air inlet in the air-flow that outside enters, by
It is sucked in low energy air-flow back into air port, top low regime and the Forming Mechanism of recirculating zone of blade can be limited, so as to
Enough Development of Boundary Layer effectively inhibited close to vane tip, and the generation of flow separation is controlled, therefore the flowing in oblique flow wind wheel
Situation significantly improves, and can also correspondingly increase in small flow area and stall zone range inner outlet static pressure.
It is limited in the formation of the low regime and recirculating zone at the top of blade by the operating condition of small flow, vane tip is let out
The control in leakage whirlpool can also play a positive role, therefore the airflow homogeneity of blade exit can significantly improve, and flowing is stablized
Property is also got well than diagonal flow fan in the related technology.
The interference effect of exit the fluid jet tail probability series and vane diffuser of oblique flow wind wheel can also be reduced, in turn
It is beneficial to control the disengaging of the whirlpool Ye Ding, improves the aerodynamic noise peak value of diagonal impeller leaf frequency multiplication, can also improves and cause since whirlpool is detached from
Turbulent flow broadband noise, thus play the role of reduce diagonal flow fan aerodynamic noise.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the structural schematic diagram of diagonal flow fan in the related technology；
Fig. 2 shows the schematic diagram of the section structure of A-A section in Fig. 1；
Fig. 3 shows the structural schematic diagram of diagonal flow fan according to an embodiment of the invention；
Fig. 4 shows the schematic diagram of the section structure of B-B section in Fig. 3；
Fig. 5 shows the partial structural diagram in Fig. 4 at C.
Wherein, corresponding relationship of the Fig. 3 into Fig. 5 between appended drawing reference and component names are as follows:
10 wheel cap assemblies, 20 oblique flow wind wheels, 202 wheel hubs, 204 blades, 102 outside wheel caps, 104 inside wheel caps, 1,022 the
One pipeline section, 1,024 second pipeline sections, 1026 third pipeline sections, 1024A bend pipeline section, and 106 slotted inlets, 1042 dilution zones, 1044 is straight
Cylinder flow region, 1046 oblique flow area, 1046,30 vane diffuser, 302 diffuser ontologies, 304 diffusion blades.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Referring to the diagonal flow fan of Fig. 3 to Fig. 5 description according to some embodiments of the invention.
As shown in Figure 3 and Figure 4, the diagonal flow fan of embodiment according to the present invention, comprising: wheel cap assemblies 10, including it is multiple
The wheel cap being arranged, wheel cap offer air inlet, and the wheel cap in outside is relative in inside in two wheel caps of arbitrary neighborhood
Wheel cap downstream extend, to form return flow line between the two of arbitrary neighborhood wheel cap, return flow line is connected to air inlet；
Oblique flow wind wheel 20, is partially set to the inside of the most inner side wheel cap 104 in multiple wheel caps, diagonal flow fan include wheel hub 202 and
Multiple blades 204 on wheel hub 202 are set, and the top of blade 204 can be simultaneously correspondingly arranged with the entrance of return flow line.
In this embodiment, by setting multiple wheel caps being arranged for the fan shroud of diagonal flow fan, wheel cap is from outside to inside
Length in the axial direction of blower is gradually reduced, so that the wheel cap of inside is completely in the inside of the wheel cap in outside, and then can
Circumferential return flow line is formed between two adjacent wheel caps, the blade 204 on oblique flow wind wheel 20 is at least partially in interior
The inside of side wheel lid 104, oblique flow wind wheel 20 rotate when, form a large amount of low speed flow at the leaf top of blade 204, pass through by
Low speed flow returns to the region of air inlet by the return flow line formed between wheel cap, to prevent the flow in blower from dropping to one
After determining degree, the reflux that low speed flow generates forms flow-disturbing between the air-flow of entrance, the flow field of the inside of wind wheel is caused to occur
Fluctuation, and then the stability of diagonal flow fan operation is improved, the aeroperformance of diagonal flow fan is improved, while reducing leaf frequency multiplication
The increased probability of noise.
Preferably, the quantity of wheel cap is 2.
As shown in Figures 3 to 5, in the above embodiment, it is preferable that the outermost wheel cap 102 being set in multiple wheel caps
It successively include the first pipeline section 1022, the second pipeline section 1024 and third pipeline section 1026 interconnected, the first pipeline section along airflow direction
1022 one end offers air inlet, wherein diameter of the diameter of the first pipeline section 1022 less than the second pipeline section 1024, the second pipeline section
1024 successively include the bending pipeline section 1024A of straight pipe with bending inwardly along airflow direction, and third pipeline section 1026 is configured to
The taper pipeline section that can be adapted to the back segment of oblique flow wind wheel 20, one end of taper pipeline section are connected to bending pipeline section 1024A；With it is outermost
The tail end of the adjacent inside wheel cap 104 of side wheel lid 102 is correspondingly arranged with bending pipeline section 1024A, and tail end and bending pipeline section
The slotted inlets 106 of 1024A formation return flow line.
In this embodiment, by the structure of restriction outermost wheel cap 102, between the back segment by oblique flow wind wheel 20
Adaptation, make to form Meridian Passage between outermost wheel cap 102 and the top of blade 204, can with adjacent inside wheel cap 104 it
Between form the slotted inlets 106 of return flow line, the top at the top of blade 204 of oblique flow wind wheel 20 is arranged in slotted inlets 106, from
And the low energy air-flow generated in rotary course can be made to enter return flow line by slotted inlets 106, to reduce flowing
The probability that segregation phenomenon generates, and then promote the stability of diagonal flow fan operation.
As shown in figure 5, in any of the above-described embodiment, it is preferable that the quantity of multiple wheel caps being arranged is 2, most inner side
Wheel cap 104 is set in the second pipeline section 1024；The outer diameter of most inner side wheel cap 104 is gradually increased along airflow direction, so that the second pipe
The return flow line gradually expanded is formed between the inner sidewall of section 1024 and the lateral wall of most inner side wheel cap 104；Most inner side wheel cap 104
Inside successively include along airflow direction interconnected dilution zone 1042, straight tube flow region 1044 corresponding with air inlet and
The side wall in the oblique flow area 1046 being adapted to the front end of oblique flow wind wheel 20, dilution zone 1042 is tilted along airflow direction to middle part, wherein
Low speed flow flows into dilution zone 1042 by return flow line.
In this embodiment, when diagonal flow fan works, radial differential pressure is formed in Meridian Passage, is gradually subtracted in air-flow velocity
When small and entrance stall zone, pressure difference increases, and close to the region low regime easy to form in downstream or returns at the top of blade 204 at this time
Area is flowed, after opening up return flow line, air-flow can slit two sides two sides shape between nearside wheel lid 104 and outside wheel cap 102
At differential pressure gradients, so as to make low energy air-flow pass through the air inlet that slotted inlets 106 export to diagonal flow fan, to enter blending
Area 1042 be externally entering air inlet blend after, reenter diagonal flow fan, due to low energy air-flow be sucked up into
Air port can effectively inhibit to limit the Forming Mechanism of the low regime and recirculating zone at the top of blade 204 close to blade
The Development of Boundary Layer at 204 top, and the generation of flow separation is controlled, therefore the flow condition in oblique flow wind wheel 20 can obtain
To significantly improving, and the exit static pressure within the scope of small flow area and stall zone can also correspondingly increase.
As shown in figure 5, in any of the above-described embodiment, it is preferable that in office one section by the axis of diagonal flow fan,
The tie point D of dilution zone 1042 and straight tube flow region 1044 is set to the up-front upstream of blade 204.
In this embodiment, by being arranged the tie point D between 1042 domain straight tube flow region 1044 of dilution zone in blade
204 up-front upstream, the air-flow that low energy air-flow can be enable to enter with outside sufficiently blend, oblique to enter after blending
Wind wheel 20 is flowed, rather than low energy air-flow is importing directly into oblique flow wind wheel 20, to promote air-flow flow efficiency.
As shown in figure 5, in any of the above-described embodiment, it is preferable that determine the tilt angle of the side wall of dilution zone 1042
To blend angle α, blending angle α is greater than 0 °, and is less than or equal to 30 °.
In this embodiment, the range of angle α is blended by limiting, on the one hand, can make reflux gas smooth from air inlet
Into on the other hand, the air-flow for also ensuring that low energy air-flow enters with outside can be blended sufficiently, and then reduce oblique flow wind wheel 20
There is the probability fluctuated in inside.
As shown in figure 5, in any of the above-described embodiment, it is preferable that slotted inlets 106 on pipeline section 1024A will be bent and entered
Mouth point is determined as the suction point E of low energy air-flow, in airflow direction, the front end blade 204 of the blade 204 before suction point E
Ratio between 204 total length of length and blade is greater than or equal to 0.4, and is less than or equal to 0.7.
In this embodiment, since low energy air-flow compares concentration in the region of above-mentioned restriction, thus by limiting suction
The position of point E promotes return flow line to the efficiency of the suction of low energy air-flow, so realize to the starting performance of diagonal flow fan with make an uproar
The optimization of sound performance.
As shown in figure 5, in any of the above-described embodiment, it is preferable that by the junction of taper pipeline section and bending pipeline section 1024A
Angle be determined as aspirating angle beta, suction angle beta is greater than 90 °, and less than 180 °.
In this embodiment, the tangential direction of taper pipeline section is the tangential direction of Meridian Passage, and suction angle beta is then tangent line
Angle between direction and the inner wall for bending pipeline section 1024A is conducive to promote low energy by limiting the angular range of suction angle beta
The reflux efficiency of air-flow.
In any of the above-described embodiment, it is preferable that gap and slotted inlets 106 between the top and wheel cap of blade 204
Width between ratio be more than or equal to 0.9, and be less than or equal to 1.1.
In this embodiment, between by setting the width of slotted inlets 106 between the top and wheel cap of blade 204
Gap width is close, on the one hand, too small gap influence reflux efficiency, on the other hand, the excessive width that cracks also results in air
Regurgitant volume it is excessive, influence the operational efficiency of diagonal flow fan.
In any of the above-described embodiment, it is preferable that further include: vane diffuser 30 is set to the downstream of oblique flow wind wheel 20,
Vane diffuser 30 includes diffuser ontology 302, and the multiple diffusion blades 304 being set on diffuser ontology 302, multiple
Diffusion blade 304 is circumferentially laid on diffuser ontology 302, and diffusion channel is formed between two adjacent diffusion blades 304.
In this embodiment, wheel cap assemblies 10 may include the inside wheel cap 104 and outside wheel cap 102 being arranged, nearside wheel
Air intake passage is formed between 204 leading portion of inner wall and blade of lid 104, wheel cap 102 on the outside of the outer wall and leading portion of inside wheel cap 104
Return flow line is formed between inner wall, forms air inlet runner, oblique flow wind wheel 20 on the outside of back segment between 204 rear end of wheel cap 102 and blade
The power of motor is converted into air pressure energy and kinetic energy, vane diffuser 30 has multiple diffusion blades 304, by adjacent
Channel expansion design between blade 204 is to realize diffusion function, the kinetic energy for the fluid with higher momentum that impeller is excluded
It is converted into pressure energy.
By the way that return flow line is arranged, further prevents low energy fluid to enter between diffuser and diffuser vane 204 and produced
Raw interference, further decreases and the increased probability of leaf frequency multiplication noise occurs in stall condition.
The household appliance of embodiment according to the present invention, including diagonal flow fan described in any of the above-described embodiment.
Wherein, household appliance can be dust catcher or range hood.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ",
The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can
Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term " on ", "lower", "left", "right", "front", "rear"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation,
It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of diagonal flow fan characterized by comprising
Cap assemblies are taken turns, including multiple wheel caps being arranged, the wheel cap offers air inlet, in two wheel caps of arbitrary neighborhood
The wheel cap in outside downstream extends relative to the wheel cap in inside, in two wheels of arbitrary neighborhood
Return flow line is formed between lid, the return flow line is connected to the air inlet；
Oblique flow wind wheel, is partially set to the inside of the most inner side wheel cap in multiple wheel caps, and the diagonal flow fan includes wheel hub
And multiple blades on the wheel hub are set, the top of the blade corresponding with the entrance of the return flow line can simultaneously be set
It sets.
2. diagonal flow fan according to claim 1, which is characterized in that
The outermost wheel cover rim airflow direction being set in multiple wheel caps successively includes the first pipeline section interconnected, second
Pipeline section and third pipeline section, one end of first pipeline section offer air inlet, wherein the diameter of first pipeline section is less than described
The diameter of second pipeline section, the bending tube that second pipeline section successively includes straight pipe with bending inwardly along the airflow direction
Section, the third pipeline section are configured to the taper pipeline section being adapted to the back segment of the oblique flow wind wheel, the taper pipeline section
One end is connected to the bending pipeline section；
The tail end of the inside wheel cap adjacent with the outermost wheel cap is correspondingly arranged with the bending pipeline section, and the tail end with
The bending pipeline section forms the slotted inlets of the return flow line.
3. diagonal flow fan according to claim 2, which is characterized in that
The quantity of the multiple wheel cap being arranged is 2, and the most inner side wheel cap is set in second pipeline section；
The outer diameter of the most inner side wheel cap is gradually increased along the airflow direction so that the inner sidewall of second pipeline section with it is described
The return flow line gradually expanded is formed between the lateral wall of most inner side wheel cap；
The inside of the most inner side wheel cap successively includes interconnected dilution zone and the air inlet pair along the airflow direction
The straight tube flow region answered and the oblique flow area being adapted to the front end of the oblique flow wind wheel, the side wall of the dilution zone is along the air-flow
Direction is tilted to middle part,
Wherein, low energy air-flow flows into the dilution zone by the return flow line.
4. diagonal flow fan according to claim 3, which is characterized in that
On in office one section by the axis of the diagonal flow fan, the dilution zone and the tie point of the straight tube flow region are set
It is placed in the up-front upstream of the blade.
5. diagonal flow fan according to claim 4, which is characterized in that
The tilt angle of the side wall of the dilution zone is determined as to blend angle, the blending angle is greater than 0 °, and is less than or equal to
30°。
6. diagonal flow fan according to claim 5, which is characterized in that
The entrance of the slotted inlets on the bending pipeline section is determined as to the suction point of the low energy air-flow, in the air-flow
Direction, the ratio between the front end length of blade of the blade before the suction point and the vane overall length degree are greater than
Or it is equal to 0.4, and be less than or equal to 0.7.
7. diagonal flow fan according to claim 6, which is characterized in that
It is determined as the angle of the junction of the taper pipeline section and the bending pipeline section to aspirate angle, the suction angle is greater than 90 °,
And less than 180 °.
8. diagonal flow fan according to claim 1, which is characterized in that the fan shroud includes:
Ratio between the width of slotted inlets described in gap between the top of the blade and the wheel cap is more than or equal to
0.9, and it is less than or equal to 1.1.
9. diagonal flow fan according to any one of claim 1 to 8, which is characterized in that further include:
Vane diffuser is set to the downstream of the oblique flow wind wheel, and the vane diffuser includes diffuser ontology, and setting
In multiple diffusion blades on the diffuser ontology, multiple diffusion blades are circumferentially laid on the diffuser ontology, phase
Diffusion channel is formed between two adjacent diffusion blades.
10. a kind of household appliance characterized by comprising
Diagonal flow fan as claimed in any one of claims 1-9 wherein.
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| CN201810497062.6A CN110513327B (en) | 2018-05-22 | 2018-05-22 | Diagonal flow fan and household electrical appliance |
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| CN201810497062.6A CN110513327B (en) | 2018-05-22 | 2018-05-22 | Diagonal flow fan and household electrical appliance |
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| CN110513327A true CN110513327A (en) | 2019-11-29 |
| CN110513327B CN110513327B (en) | 2021-03-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111456965A (en) * | 2020-04-16 | 2020-07-28 | 李伟 | Centrifugal axial flow turbine and novel jet engine mode and operation method |
| CN114233652A (en) * | 2021-12-06 | 2022-03-25 | 中国船舶重工集团公司第七0四研究所 | Low-noise high-speed diagonal flow fan for ship |
| WO2022134963A1 (en) * | 2020-12-25 | 2022-06-30 | 广东美的白色家电技术创新中心有限公司 | Fan assembly and vacuum cleaner |
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| WO2022134963A1 (en) * | 2020-12-25 | 2022-06-30 | 广东美的白色家电技术创新中心有限公司 | Fan assembly and vacuum cleaner |
| CN114233652A (en) * | 2021-12-06 | 2022-03-25 | 中国船舶重工集团公司第七0四研究所 | Low-noise high-speed diagonal flow fan for ship |
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| CN110513327B (en) | 2021-03-02 |
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