CN110513305A - Diagonal flow fan and household appliance - Google Patents
Diagonal flow fan and household appliance Download PDFInfo
- Publication number
- CN110513305A CN110513305A CN201810496447.0A CN201810496447A CN110513305A CN 110513305 A CN110513305 A CN 110513305A CN 201810496447 A CN201810496447 A CN 201810496447A CN 110513305 A CN110513305 A CN 110513305A
- Authority
- CN
- China
- Prior art keywords
- cover
- outer cylinder
- cylinder section
- guiding ring
- interior cover
- 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.)
- Pending
Links
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
- F04D23/00—Other rotary non-positive-displacement pumps
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- 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
-
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- 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: fan shroud, and fan shroud offers air inlet respectively；Oblique flow wind wheel, is placed in fan shroud, and is set to the downstream of air inlet；Vane diffuser is placed in fan shroud, and is set to the downstream of oblique flow wind wheel, and diffuser can be enclosed with fan shroud sets out diffusion channel；Sound reflecting structure, it is set to the downstream of vane diffuser and is connect with fan shroud, sound reflecting structure is provided with the air outlet being connected to air inlet far from one end of vane diffuser, sound reflecting structure can structure set out the exhaust air flue being connected to diffusion channel, exhaust air flue is gradually expanded along air-out direction.According to the technical solution of the present invention, it prevents step caused by discharge area sudden expansion to detour, and then reduces sudden expansion loss, can also prevent from leading to occur the probability that unstable vortex is detached from since the area of section sudden expansion of outlet is excessive, and then reduce pneumatic 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 increasingly being application in recent years, in the related technology, as shown in Figure 1,
Diagonal flow fan is mainly by structure compositions such as collecting cover, motor, impeller and diffusers, and air enters inlet manifold cover by side, so
Impeller is entered by a segment pipe afterwards, is rotated by motor band movable vane piece to air work, getting a promotion property of air velocity is at height
The air of speed belt rotation, and static pressure also gets a promotion, the air of hyper tape rotation, which enters diffuser, to carry out eliminating rotation and again diffusion,
Although at rear portion runner setting vane diffuser interior air-flow be remedied to close to axial direction, the outlet of diffuser also have compared with
High flowing velocity can be higher than 10m/s under normal conditions, and there are still following defects in the process of running:
(1) when being directly accessed pipeline or being discharged into user environment, since the outlet high flow velocities in diffuser are by going out
It after open area sudden expansion, generates apparent step and streams, and then generate larger sudden expansion loss, the kinetic energy of motor input is less than reasonable benefit
With causing energy consumption higher.
(2) the wideband pneumatic noise that the impeller of blower and diffuser inside generate is directly facing user environment or direct spoke
It injects into pipeline, it is larger to the influence of noise of external environment.
(3) since the area of section sudden expansion of outlet is excessive, step, which streams, causes unstable vortex to be detached from, and can also give oblique flow
Blower brings biggish pneumatic noise.
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: blower
Cover, fan shroud offer air inlet respectively；Oblique flow wind wheel, is placed in fan shroud, and is set to the downstream of air inlet；Blade expands
Depressor is placed in fan shroud, and is set to the downstream of oblique flow wind wheel, and diffuser can be enclosed with fan shroud sets out diffusion channel；
Sound reflecting structure is set to the downstream of vane diffuser and connect with fan shroud, sound reflecting structure far from vane diffuser one
End is provided with the air outlet being connected to air inlet, sound reflecting structure can structure set out the exhaust air flue being connected to diffusion channel, out
Wind air duct is gradually expanded along air-out direction.
In the technical scheme, sound reflecting structure is added by the tail end in diffusion channel, have in sound reflecting structure by
The high-speed flow of the exhaust air flue of flaring, the outlet outflow in the diffusion channel of diffuser enters the exhaust air flue gradually expanded
In, on the one hand, compared with high-speed flow is directly discharged into access conduit or user environment in the prior art, prevent exit face
Step caused by product sudden expansion detours, and then reduces sudden expansion loss, on the other hand, can also prevent the area of section due to outlet prominent
Expand the probability of the excessive vortex disengaging for causing to occur unstable, and then reduces pneumatic noise.
Wherein, diffuser includes diffuser ontology, and the multiple diffusion blades being set on diffuser ontology, diffuser
Blade can be enclosed with fan shroud sets out diffusion channel.
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 sound reflecting structure includes: the outer cylinder section being mutually arranged and interior cover, outer cylinder
Section is connected with fan housing body, and outer cylinder section is configured to the streamline cylinder segment structure gradually tapered up along air-out direction；Interior cover is by structure
It is set as along air-out direction gradually to the arc cover of contract, arc-shaped cover body can be enclosed with streamline cylinder segment structure sets out outlet air wind
Road.
It in the technical scheme, is the outer cylinder section being mutually arranged and interior cover by sound reflecting structure setting, and passing through will be outer
Cylinder section is set as the streamline cylinder segment structure gradually tapered up along air-out direction, to realize sound reflecting effect according to sound reflecting principle, into
And the noise given off from diffusion channel is reduced, it is corresponding to set arc cover for interior cover, and then in the inner wall of outer cylinder section
Structure sets out the exhaust air flue gradually expanded between the outer wall of interior cover, while reducing energy loss, advantageously reduces gas
Flow noise.
In addition, cover structure is an arc knot closed at one end by being interior cover structure by internal structure setting
Structure prevents backflow phenomenon while cooperatively forming the exhaust air flue of expansion with outer cylinder section.
As a kind of connection type, outer cylinder section can be fixedly connected with fan shroud, and interior cover can be with vane diffuser
Diffuser ontology be fixedly connected.
In any of the above-described technical solution, it is preferable that interior cover is configured to hemispherical cover structure.
In the technical scheme, by the way that interior cover is configured to hemispherical cover structure, on the one hand, can reduce step around
The raw probability of miscarriage, on the other hand, structure is relatively easy, prepares more convenient.
In any of the above-described technical solution, it is preferable that interior cover is configured to circumferentially to reducing between curvature of centre
Arc cover.
In the technical scheme, interior cover can also be arranged to the arc cover being circumferentially gradually reduced to curvature of centre,
To form the streamlined structure that curvature gradually changes, to meet the construction demand of the exhaust air flue of expansion.
In any of the above-described technical solution, it is preferable that sound reflecting structure further include: at least one conical flow guiding ring, setting
Between outer cylinder section and interior cover, gradually to contract while conical flow guiding ring extends along air-out wind direction, with respectively and outside
Cylinder section and interior cover enclose and set out exhaust air flue.
In the technical scheme, by the way that conical flow guiding ring is arranged between outer cylinder section and interior cover, conical flow guiding ring can be with
It is set as cone structure, to be gradually tapered up along air-out direction, by the way that the exhaust air flue in outside is formed between outer cylinder section respectively, with
The exhaust air flue that inside is formed between interior cover, realizes the shunting of high-speed flow, and then can reduce the frequency of pneumatic noise,
While realizing kinetic energy recycling, the radiated noise in exit can reduce.
When conical flow guiding ring has multiple, multiple conical flow guiding rings edges are laid from inside to outside.
As a kind of connection type, linking arm can be set on conical flow guiding ring, with by linking arm respectively with outer cylinder
Section and the connection of interior cover.
In any of the above-described technical solution, it is preferable that beginning and inner cover of the beginning of conical flow guiding ring with respect to outer cylinder section
The beginning of body close to air outlet be arranged, between the tail end in diffusion channel and the beginning of conical flow guiding ring formed by outer cylinder section with
Interior cover encloses the first segment exhaust air flue gradually expanded for setting and being formed, and the diffusion angle of first segment exhaust air flue is greater than or equal to 7 °,
And it is less than or equal to 30 °.
In the technical scheme, high-speed flow is from the diffusion channel outflux of diffuser, flow into first by by outer cylinder section with
Interior cover, which encloses, to be set in the first segment exhaust air flue gradually expanded to be formed, and first end exhaust air flue is expanding channel, expanding channel
With diffusion angle, the angular range by limiting diffusion angle drops as far as possible while as far as possible to kinetic energy derived from diffusion channel
Low flow losses.
In any of the above-described technical solution, it is preferable that diffusion angle is greater than or equal to 14 ° and is less than or equal to 30 °.
In the technical scheme, the angular range of diffusion angle is further decreased, to promote the noise reduction effect of sound reflecting structure,
Wherein, if the axial space of sound reflecting structure is shorter, 30 ° of diffusion angle can be used, to promote diffusion effect, if sound
When the axial space of catoptric arrangement is longer, 14 ° of diffusion angle can be used, to maximize promotion dynamic pressure, to be converted to static energy,
And then influence of noise of the reduction to external environment.
Wherein, by limiting diffusion angle as more than or equal to 14 °, i.e., the beginning of conical flow guiding ring is in starting area of section
The position for being more than or equal to 14 ° or so diffusion angles is formed, between the exit area of diffuser to prevent local stoppages
Fluid generation accelerates again and brings loss.
In any of the above-described technical solution, it is preferable that beginning chamferedization of conical flow guiding ring is arranged.
In the technical scheme, by the way that the end face at the beginning of conical flow guiding ring is carried out chamfering setting, to promote transmitting
The adaptability of the air-flow to come over reduces energy loss.
In any of the above-described technical solution, it is preferable that the maximum outside diameter of conical flow guiding ring is greater than the minimum diameter of outer cylinder section；
The minimum diameter of conical flow guiding ring is less than the maximum outside diameter of interior cover.
In the technical scheme, by the way that the maximum outside diameter of conical flow guiding ring to be set greater than to the minimum diameter of outer cylinder section,
And the minimum diameter of conical flow guiding ring is less than the maximum outside diameter of interior cover, and in this way as viewed from air outlet, diffuser can be complete
It is blocked by conical flow guiding ring and interior cover, i.e., can't see diffuser ontology and diffuser vane completely, to realize diffuser
The efficiency that the noise given off is reflected maximizes, and reduces the noise of diagonal flow fan.
In any of the above-described technical solution, it is preferable that conical flow guiding ring is enclosed to set by equal thickness plate body to be formed；Or conical flow guiding
Ring is enclosed to set by airfoil type plate body to be formed, wherein the contour line in the section of equal thickness plate body is circular arc line or Bezier.
It in the technical scheme, is in streamline on the surface for realizing conical flow guiding ring by limiting the shape of conical flow guiding ring
While type structure, the dynamic pressure of the outlet effluent stream in the diffusion channel of vane diffuser is reverted to static pressure, In as far as possible
While promoting diagonal flow fan efficiency, energy consumption is reduced, wherein better static pressure can be obtained using airfoil plate body and restored
In any of the above-described technical solution, it is preferable that sound reflecting structure further include: multiple gussets are circumferentially laid in interior
On cover, and can respectively radially with extend axially outward, with pass through water conservancy diversion ring portion extend on the inner wall of outer cylinder section.
In the technical scheme, by being arranged multiple gussets, gusset can respectively with outer cylinder section, conical flow guiding ring and interior
Cover connection, on the one hand, realize connection outer cylinder section, guide ring and inner cover body function, it is strong with the structure for promoting sound reflecting structure
On the other hand degree can play and air-flow is deflected to circumferential effect.
In any of the above-described technical solution, it is preferable that the windward side of gusset is configured to arc surface.
In the technical scheme, the windward side of gusset is configured to arc surface, gusset tail portion can be reduced and generate fluid whirlpool
Stream starting noise additional caused by falling off.
Wherein, the thickness of gusset is unsuitable blocked up.
In any of the above-described technical solution, it is preferable that fan shroud includes the first cover and the second cover being mutually butted, tiltedly
Stream wind wheel is placed in the first cover, and vane diffuser accommodating is enclosed with the inner wall with the second cover in the second cover and sets out expansion
Pressure passageway.
In any of the above-described technical solution, it is preferable that multiple diffusion blades are circumferentially laid on diffuser ontology, adjacent
Two diffusion blades between formed diffusion channel.
Vane diffuser has multiple diffusion blades, realizes 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.
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 increasing sound reflecting structure at the air outlet of existing diagonal flow fan, examined first from aerodynamics angle
Consider, carry out diffusion for being introduced into sound reflecting structure from the high-speed flow that diffuser exit excludes, and by limiting diffusion angle pair
The area of section in diffusion channel optimizes, as far as possible by height derived from the exit in the diffusion channel of vane diffuser
The dynamic pressure of fast air-flow reverts to static pressure, and then improves diagonal flow fan efficiency, reduces motor electric quantity consumption.
In addition, the rational design of deflector is reflected the sound wave radiated from vane diffuser as far as possible by case,
It blocks sound wave to propagate outward, reduces the noise of diagonal flow fan.
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 structural schematic diagrams of diagonal flow fan according to an embodiment of the invention；
Fig. 3 shows the schematic diagram of the section structure of A-A section in Fig. 2；
Fig. 4 shows the cross-section structure signal of the sound reflecting structure in diagonal flow fan according to an embodiment of the invention
Figure；
The stereochemical structure that Fig. 5 shows the sound reflecting structure in diagonal flow fan according to another embodiment of the invention is shown
It is intended to.
Wherein, corresponding relationship of the Fig. 2 into Fig. 5 between appended drawing reference and component names are as follows:
10 fan shrouds, 20 oblique flow wind wheels, 30 vane diffusers, 40 sound reflecting structures, 402 outer cylinder sections, cover in 404,406
Conical flow guiding ring, 408 gussets, 102 first covers, 104 second covers.
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. 2 to Fig. 5 description according to some embodiments of the invention.
As shown in Figure 2 and Figure 3, the diagonal flow fan of embodiment according to the present invention, comprising: fan shroud 10, fan shroud 10 divide
Air inlet is not offered；Oblique flow wind wheel 20 is placed in fan shroud 10, and is set to the downstream of air inlet；Vane diffuser 30,
It is placed in fan shroud 10, and is set to the downstream of oblique flow wind wheel 20, diffuser can be enclosed with fan shroud 10 sets out diffusion channel；
Sound reflecting structure 40 is set to the downstream of vane diffuser 30 and connect with fan shroud 10, and sound reflecting structure 40 expands far from blade
One end of depressor 30 is provided with the air outlet being connected to air inlet, sound reflecting structure 40 can structure set out and be connected to diffusion channel
Exhaust air flue, exhaust air flue are gradually expanded along air-out direction.
In this embodiment, sound reflecting structure 40 is added by the tail end in diffusion channel, had in sound reflecting structure 40
The high-speed flow of the exhaust air flue gradually expanded, the outlet outflow in the diffusion channel of diffuser enters the exhaust air flue gradually expanded
In, on the one hand, compared with high-speed flow is directly discharged into access conduit or user environment in the prior art, prevent exit face
Step caused by product sudden expansion detours, and then reduces sudden expansion loss, on the other hand, can also prevent the area of section due to outlet prominent
Expand the probability of the excessive vortex disengaging for causing to occur unstable, and then reduces pneumatic noise.
Wherein, diffuser includes diffuser ontology, and the multiple diffusion blades being set on diffuser ontology, diffuser
Blade can be enclosed with fan shroud 10 sets out diffusion channel.
In addition, the diagonal flow fan in above-described embodiment provided by the invention can also have following additional technical feature:
As shown in figure 4, in the above embodiment, it is preferable that sound reflecting structure 40 includes: the outer cylinder section 402 being mutually arranged
With interior cover 404, outer cylinder section 402 is connected with fan housing body, and outer cylinder section 402 is configured to the stream gradually tapered up along air-out direction
Spool segment structure；Interior cover 404 is configured to along air-out direction gradually to the arc cover of contract, and arc-shaped cover body can be with stream
Spool segment structure, which encloses, sets out exhaust air flue.
In this embodiment, the outer cylinder section 402 being mutually arranged and interior cover 404 are set by sound reflecting structure 40, and led to
It crosses and sets the streamline cylinder segment structure gradually tapered up along air-out direction for outer cylinder section 402, with anti-according to sound reflecting principle realization sound
Effect is penetrated, and then reduces the noise given off from diffusion channel, it is corresponding to set arc cover, Jin Er for interior cover 404
Structure sets out the exhaust air flue gradually expanded between the inner wall of outer cylinder section 402 and the outer wall of interior cover 404, is reducing energy loss
Meanwhile advantageously reducing pneumatic noise.
In addition, cover structure is an arc closed at one end by being interior 404 structure of cover by internal structure setting
Structure prevents backflow phenomenon while cooperatively forming the exhaust air flue of expansion with outer cylinder section 402.
As a kind of connection type, outer cylinder section 402 can be fixedly connected with fan shroud 10, and interior cover 404 can be with leaf
The diffuser ontology of piece diffuser 30 is fixedly connected.
In any of the above-described embodiment, it is preferable that interior cover 404 is configured to hemispherical cover structure.
In this embodiment, by the way that interior cover 404 is configured to hemispherical cover structure, on the one hand, can reduce step
The probability of generation is streamed, on the other hand, structure is relatively easy, prepares more convenient.
In any of the above-described embodiment, it is preferable that interior cover 404 is configured to circumferentially to reducing between curvature of centre
Arc cover.
In this embodiment, interior cover 404 can also be arranged to the arc cover being circumferentially gradually reduced to curvature of centre,
To form the streamlined structure that curvature gradually changes, to meet the construction demand of the exhaust air flue of expansion.
As shown in figs. 4 and 5, in any of the above-described embodiment, it is preferable that sound reflecting structure 40 further include: at least one
Conical flow guiding ring 406 is set between outer cylinder section 402 and interior cover 404, and conical flow guiding ring 406 extends along air-out wind direction
Simultaneously gradually to contract, to enclose with outer cylinder section 402 and interior cover 404 respectively and set out exhaust air flue.
In this embodiment, by the way that conical flow guiding ring 406, conical flow guiding are arranged between outer cylinder section 402 and interior cover 404
Ring 406 can be set to cone structure, to gradually taper up along air-out direction, by forming outside between outer cylinder section 402 respectively
Exhaust air flue, between interior cover 404 formed inside exhaust air flue, realize the shunting of high-speed flow, and then can drop
The frequency of low-flow noise can reduce the radiated noise in exit while realizing kinetic energy recycling.
When conical flow guiding ring 406 has multiple, multiple conical flow guiding rings 406 are laid along from inside to outside.
As a kind of connection type, linking arm can be set on conical flow guiding ring 406, with by linking arm respectively and outside
Cylinder section 402 and interior cover 404 connect.
In any of the above-described embodiment, it is preferable that the beginning of conical flow guiding ring 406 with respect to outer cylinder section 402 beginning and
The beginning of interior cover 404 is arranged close to air outlet, to be formed between the tail end in diffusion channel and the beginning of conical flow guiding ring 406
The first segment exhaust air flue gradually expanded for setting and being formed, the diffusion of first segment exhaust air flue are enclosed by outer cylinder section 402 and interior cover 404
Angle is greater than or equal to 7 °, and is less than or equal to 30 °.
In this embodiment, high-speed flow is from the diffusion channel outflux of diffuser, flow into first by by outer cylinder section 402 with
Interior cover 404, which encloses, to be set in the first segment exhaust air flue gradually expanded to be formed, and first end exhaust air flue is expanding channel, and expansion is logical
Road has diffusion angle, by limiting the angular range of diffusion angle, while as far as possible to kinetic energy derived from diffusion channel, as far as possible
Reduce flow losses.
In any of the above-described embodiment, it is preferable that diffusion angle is greater than or equal to 14 ° and is less than or equal to 30 °.
In this embodiment, the angular range of diffusion angle is further decreased, to promote the noise reduction effect of sound reflecting structure 40,
Wherein, if the axial space of sound reflecting structure 40 is shorter, 30 ° of diffusion angle can be used, to promote diffusion effect, if
When the axial space of sound reflecting structure 40 is longer, 14 ° of diffusion angle can be used, it is quiet to be converted to maximize promotion dynamic pressure
Pressure energy, and then reduce the influence of noise to external environment.
Wherein, by limiting diffusion angle as more than or equal to 14 °, i.e., the beginning of conical flow guiding ring 406 is in starting section
The position for being more than or equal to 14 ° or so diffusion angles is formed between area and the exit area of diffuser, to prevent part
Blocking fluid generation accelerates again and brings loss.
In any of the above-described embodiment, it is preferable that beginning chamferedization of conical flow guiding ring 406 is arranged.
In this embodiment, by the way that the end face at the beginning of conical flow guiding ring 406 is carried out chamfering setting, to promote transmitting
The adaptability of the air-flow to come over reduces energy loss.
In any of the above-described embodiment, it is preferable that the maximum outside diameter of conical flow guiding ring 406 is greater than the minimum of outer cylinder section 402
Internal diameter；The minimum diameter of conical flow guiding ring 406 is less than the maximum outside diameter of interior cover 404.
In this embodiment, by the way that the maximum outside diameter of conical flow guiding ring 406 to be set greater than in the minimum of outer cylinder section 402
Diameter, and the minimum diameter of conical flow guiding ring 406 is less than the maximum outside diameter of interior cover 404, in this way as viewed from air outlet, diffuser
It can be blocked completely by conical flow guiding ring 406 and interior cover 404, i.e., can't see diffuser ontology and diffuser vane completely,
To realize that the efficiency that the noise that diffuser gives off is reflected maximizes, the noise of diagonal flow fan is reduced.
In any of the above-described embodiment, it is preferable that conical flow guiding ring 406 is enclosed to set by equal thickness plate body to be formed；Or taper is led
Stream ring 406 is enclosed to set by airfoil type plate body to be formed, wherein the contour line in the section of equal thickness plate body is that circular arc line or Bezier are bent
Line.
In this embodiment, by limiting the shape of conical flow guiding ring 406, it is on the surface of realization conical flow guiding ring 406
While streamlined structure, the dynamic pressure of the outlet effluent stream in the diffusion channel of vane diffuser 30 is reverted to as far as possible quiet
Pressure reduces energy consumption, wherein it is extensive can to obtain better static pressure using airfoil plate body while promoting diagonal flow fan efficiency
It is multiple
As shown in figs. 4 and 5, in any of the above-described embodiment, it is preferable that sound reflecting structure 40 further include: multiple gussets
408, be circumferentially laid on interior cover 404, and can respectively radially with extend axially outward, with pass through water conservancy diversion ring portion extend
To the inner wall of outer cylinder section 402.
In this embodiment, by being arranged multiple gussets 408, gusset 408 can respectively with outer cylinder section 402, conical flow guiding
Ring 406 and interior cover 404 connect, on the one hand, realize connection outer cylinder section 402,404 function of guide ring and interior cover, to propose
On the other hand rising the structural strength of sound reflecting structure 40 can play and air-flow is deflected to circumferential effect.
It is uniformly distributed as one kind preferably embodiment, multiple gussets 408.
In any of the above-described embodiment, it is preferable that the windward side of gusset 408 is configured to arc surface.
In this embodiment, the windward side of gusset 408 is configured to arc surface, 408 tail portion of gusset can be reduced and generate stream
Body vortex starting noise additional caused by falling off.
Wherein, the thickness of gusset 408 is unsuitable blocked up.
In any of the above-described embodiment, it is preferable that fan shroud 10 includes the first cover 102 and the second cover being mutually butted
104, oblique flow wind wheel 20 is placed in the first cover 102, in the accommodating of vane diffuser 30 and the second cover 104, to cover with second
The inner wall of body 104, which encloses, sets out diffusion channel.
In any of the above-described embodiment, it is preferable that multiple diffusion blades are circumferentially laid on diffuser ontology, adjacent
Diffusion channel is formed between two diffusion blades.
Vane diffuser 30 has multiple diffusion blades, is expanded by the channel expansion design between adjacent blades to realize
Function is pressed, the kinetic energy for the fluid with higher momentum that impeller excludes is converted into pressure energy.
According to a kind of embodiment of the application, the sound reflecting structure 40 of diagonal flow fan as shown in figs. 4 and 5, structure
It specifically includes that
Outer cylinder section 402: streamlined 402 head end of outer cylinder section is realized and the diffusion pipeline of vane diffuser 30 is attached, separately
One end is realized and external pipe is connected or directly connect with the external world, and outer cylinder section 402 is the cylinder segment structure of a shrinkage type.
Interior cover 404: the design of interior cover 404 is main to be considered to prevent and reduces the generation that step streams, and interior cover 404 is set
Count into streamlined, Qi is total, can be formed with being docked using two half shells, may be designed as the streamlined knot that curvature gradually changes
Structure also forms reasonable expanding channel with other components in addition to preventing step from streaming.
Conical flow guiding ring 406: the purpose that conical flow guiding ring 406 is arranged is the effect of pneumatic flowrate distribution, by blade diffusion
The airflow portion water conservancy diversion that device 30 is discharged arrives and the expanding channel of the formation of outer cylinder section 402, and fraction is directed to and interior cover 404
The expanding channel of formation.
Gusset 408: gusset 408 plays the role of connecting outer cylinder section 402, conical flow guiding ring 406 and interior cover 404, and portion
Divide to play and air-flow is deflected to axial purpose.
Specific embodiment includes: firstly, not bringing to recycle the dynamic pressure of the outlet of vane diffuser 30 as far as possible
More flow losses pass through outer cylinder section 402 and inner cover by the fluid of the outlet outflow in the diffusion channel of vane diffuser 30 first
The exhaust air flue of cross section flaring among body 404 carries out diffusion, and principle is not generate biggish flow losses, diffusion angle
It is attached that (i.e. the channel of outer cylinder section 402 and interior cover 404 gradually expands outwardly the diffusion angle to be formed) preferably rotates to be 14 ° of ranges
Closely.
Wherein, the angular range of diffusion angle can receive at 7-30 °, be determined according to specific diffusion axial space, such as
Fruit axial space is short, and 30 ° of diffusion angle may be selected, if axial space is more well-to-do, the best angle of flare near 14 ° may be selected
It is promoted with obtaining the high dynamic pressure of most probable.
The initial position of conical flow guiding ring 406 should be between starting area of section and diffuser exit area of section being formed
More than or equal to the position of 14 ° or so the angles of flare, it is unlikely to generate local stoppages fluid and generate in this way to accelerate again and bring loss.
The setting of conical flow guiding ring 406 is it should be noted that reasonably distribute the flow of internal-and external diameter, due at interior 404 tail portion center of cover
Position is dead zone, and there are a recirculating zones of different sizes, therefore the setting of conical flow guiding ring 406 is suitably compared with fine taper guide ring
Diffusion between 406 and interior cover 404 is spent greatly.
In addition, while recycling kinetic energy, in order to reduce the noise come out from diagonal flow fan outlet radiant as far as possible, usually
The noise come out from outlet radiant is larger, and outer cylinder section 402 is designed to the shape shunk, and conical flow guiding ring 406 is designed to internal diameter
The shape of contraction, and looked over from exporting toward blower side, diffuser vane should not be seen as far as possible, will thus be expanded as far as possible
The noise that depressor gives off is reflected, and can stop sonic propagation of making an uproar to a certain extent.Sound reflecting knot as shown in figs. 4 and 5
Structure 40 can reduce diagonal flow fan total noise of centrifuge about 2dBA.The design of conical flow guiding ring 406 just becomes very crucial, preferably leads taper
The maximum outside diameter of stream ring 406 is designed bigger than the minimum diameter of outer cylinder section 402, and in the minimum diameter ratio of conical flow guiding ring 406
The maximum outside diameter of cover 404 is small, to meet the needs of can't see internal structure from outside.
In order to allow the design of conical flow guiding ring 406 that there is well adapting to property, the processing of 406 leading edge of conical flow guiding ring to incoming flow
Right angle should not be left afterwards, and 406 leading edge of conical flow guiding ring is preferably designed to oblong or circular head to obtain pair
Flow better adaptability.For the structure of conical flow guiding ring 406, the plate for generalling use equal thickness is made, but in order to better
Performance perspective, which may be designed to wing-shaped structure, can get better static pressure recovery.
The stiffener plate 408 for finally connecting conical flow guiding ring 406, outer cylinder section 402 and interior cover 404 also requires, and is meeting
Wind face is designed to that round end or Elliptical Head, thickness should not reduce 408 tail portion of gusset generation fluid vortex shedding later and bring volume
Outer aerodynamic noise.
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 (14)
1. a kind of diagonal flow fan characterized by comprising
Fan shroud, the fan shroud offer air inlet respectively；
Oblique flow wind wheel is placed in the fan shroud, and is set to the downstream of the air inlet；
Vane diffuser is placed in the fan shroud, and is set to the downstream of the oblique flow wind wheel, and the diffuser can be with
The fan shroud, which encloses, sets out diffusion channel；
Sound reflecting structure is set to the downstream of the vane diffuser and connect with the fan shroud, and the sound reflecting structure is remote
One end from the vane diffuser is provided with the air outlet being connected to the air inlet, the sound reflecting structure can structure set out
The exhaust air flue being connected to the diffusion channel, the exhaust air flue are gradually expanded along air-out direction.
2. diagonal flow fan according to claim 1, which is characterized in that the sound reflecting structure includes:
The outer cylinder section being mutually arranged and interior cover, the outer cylinder section are connected with the fan housing body, and the outer cylinder section is along outlet air
Direction is configured to the streamline cylinder segment structure gradually tapered up；
The interior cover is configured to along air-out direction gradually to the arc cover of contract, the arc-shaped cover body can with it is described
Streamline cylinder segment structure, which encloses, sets out the exhaust air flue.
3. diagonal flow fan according to claim 2, which is characterized in that
The interior cover is configured to hemispherical cover structure.
4. diagonal flow fan according to claim 2, which is characterized in that
The interior cover is configured to circumferentially to the arc cover reduced between curvature of centre.
5. diagonal flow fan according to claim 2, which is characterized in that the sound reflecting structure further include:
At least one conical flow guiding ring is set between the outer cylinder section and the interior cover, and the conical flow guiding ring edge goes out
Gradually to contract while wind wind direction extends, the outlet air wind is set out to enclose respectively with the outer cylinder section and the interior cover
Road.
6. diagonal flow fan according to claim 5, which is characterized in that
The beginning of the relatively described outer cylinder section in the beginning of the conical flow guiding ring and the beginning of the interior cover are close to the outlet air
Mouthful setting, between the tail end in the diffusion channel and the beginning of the conical flow guiding ring formed by the outer cylinder section with it is described
Interior cover encloses exhaust air flue described in the first segment gradually expanded for setting and being formed,
The diffusion angle of exhaust air flue described in first segment is greater than or equal to 7 °, and is less than or equal to 30 °.
7. diagonal flow fan according to claim 6, which is characterized in that
The diffusion angle is greater than or equal to 14 ° and is less than or equal to 30 °.
8. diagonal flow fan according to claim 5, which is characterized in that beginning chamferedization of the conical flow guiding ring is set
It sets.
9. diagonal flow fan according to claim 5, which is characterized in that
The maximum outside diameter of the conical flow guiding ring is greater than the minimum diameter of the outer cylinder section；
The minimum diameter of the conical flow guiding ring is less than the maximum outside diameter of the interior cover.
10. diagonal flow fan according to claim 5, which is characterized in that
The conical flow guiding ring is enclosed to set by equal thickness plate body to be formed；Or
The conical flow guiding ring is enclosed to set by airfoil type plate body to be formed,
Wherein, the contour line in the section of the equal thickness plate body is circular arc line or Bezier.
11. diagonal flow fan according to claim 5, which is characterized in that the sound reflecting structure further include:
Multiple gussets are circumferentially laid on the interior cover, and can respectively radially with extend axially outward, with pass through institute
Water conservancy diversion ring portion is stated to extend on the inner wall of the outer cylinder section.
12. diagonal flow fan according to claim 11, which is characterized in that
The windward side of the gusset is configured to arc surface.
13. diagonal flow fan according to any one of claim 1 to 12, which is characterized in that
The fan shroud includes the first cover and the second cover being mutually butted, and the oblique flow wind wheel is placed in first cover
It is interior, vane diffuser accommodating in second cover, enclose that set out the diffusion logical with the inner wall with second cover
Road.
14. a kind of household appliance characterized by comprising
Diagonal flow fan as described in any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810496447.0A CN110513305A (en) | 2018-05-22 | 2018-05-22 | Diagonal flow fan and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810496447.0A CN110513305A (en) | 2018-05-22 | 2018-05-22 | Diagonal flow fan and household appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110513305A true CN110513305A (en) | 2019-11-29 |
Family
ID=68622116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810496447.0A Pending CN110513305A (en) | 2018-05-22 | 2018-05-22 | Diagonal flow fan and household appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513305A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047128A (en) * | 1989-05-12 | 1990-11-21 | 韩军 | Anti-explosive local fan for coal mine |
| CN2567386Y (en) * | 2002-08-30 | 2003-08-20 | 天津市通风机厂 | Pressure return type outlet noise silencer |
| EP2418388A8 (en) * | 2010-08-12 | 2012-07-18 | Ziehl-Abegg AG | Ventilator |
| CN202628552U (en) * | 2012-04-16 | 2012-12-26 | 上虞市当代风机风冷设备有限公司 | High-efficiency low-noise mixed-flow fan |
| CN205371033U (en) * | 2015-12-18 | 2016-07-06 | 中车大连机车研究所有限公司 | Electric locomotive pulls ventilation blower with centrifugal axial compressor |
| CN206487647U (en) * | 2017-01-19 | 2017-09-12 | 东莞市铨达环保通风设备有限公司 | A kind of low-noise energy-saving flow-mixing blower fan |
| CN206592348U (en) * | 2017-03-15 | 2017-10-27 | 宁波方太厨具有限公司 | A kind of auxiliary denoising device for cooking-fume exhauster blower system |
| CN206738252U (en) * | 2017-05-12 | 2017-12-12 | 浙江马尔风机有限公司 | Low noise mesohigh axial flow blower |
-
2018
- 2018-05-22 CN CN201810496447.0A patent/CN110513305A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047128A (en) * | 1989-05-12 | 1990-11-21 | 韩军 | Anti-explosive local fan for coal mine |
| CN2567386Y (en) * | 2002-08-30 | 2003-08-20 | 天津市通风机厂 | Pressure return type outlet noise silencer |
| EP2418388A8 (en) * | 2010-08-12 | 2012-07-18 | Ziehl-Abegg AG | Ventilator |
| CN202628552U (en) * | 2012-04-16 | 2012-12-26 | 上虞市当代风机风冷设备有限公司 | High-efficiency low-noise mixed-flow fan |
| CN205371033U (en) * | 2015-12-18 | 2016-07-06 | 中车大连机车研究所有限公司 | Electric locomotive pulls ventilation blower with centrifugal axial compressor |
| CN206487647U (en) * | 2017-01-19 | 2017-09-12 | 东莞市铨达环保通风设备有限公司 | A kind of low-noise energy-saving flow-mixing blower fan |
| CN206592348U (en) * | 2017-03-15 | 2017-10-27 | 宁波方太厨具有限公司 | A kind of auxiliary denoising device for cooking-fume exhauster blower system |
| CN206738252U (en) * | 2017-05-12 | 2017-12-12 | 浙江马尔风机有限公司 | Low noise mesohigh axial flow blower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2863064B1 (en) | Centrifugal compressor | |
| CN100491743C (en) | Compressor | |
| CN201535267U (en) | Fan structure of range hood | |
| US10233779B2 (en) | Turbocharger diffuser center body | |
| EP2994647B1 (en) | Centrifugal compressor with inlet duct having swirl generators | |
| US10087824B2 (en) | Wastegate with injected flow | |
| CN100348847C (en) | Air inlet pneumatic valve for pulse detonation engine | |
| JPS5936119B2 (en) | Diffuser for centrifugal compressor | |
| CN211901078U (en) | Axial flow guide diffuser and high-speed motor with same | |
| JPWO2018147128A1 (en) | Centrifugal compressor, turbocharger | |
| CN110374900A (en) | A kind of flow-mixing blower fan with sinusoidal pattern meridional channel | |
| Walkingshaw et al. | A numerical study of the flow fields in a highly off-design variable geometry turbine | |
| CN101749257B (en) | Circulating pressure pipeline compressor | |
| US10823195B2 (en) | Diffuser pipe with non-axisymmetric end wall | |
| JP7157155B2 (en) | Centrifugal compressor and turbocharger | |
| JPS61255298A (en) | Method of compressing elastic fluid and compressor device | |
| CN108412809A (en) | Flow guide ring, centrifugal fan and air conditioner | |
| CN208886870U (en) | A kind of range hood | |
| CN111441990A (en) | Fluid director, fan subassembly and electrical apparatus | |
| CN110513327B (en) | Diagonal flow fan and household electrical appliance | |
| CN211975497U (en) | Fluid director, fan subassembly and electrical apparatus | |
| CA2415264A1 (en) | Centrifugal fan | |
| CN110513305A (en) | Diagonal flow fan and household appliance | |
| CA2938121C (en) | Counter-rotating compressor | |
| CN218093632U (en) | Centrifugal fan and range hood |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |