CN110439861A - A kind of volute structure of centrifugal blower - Google Patents
A kind of volute structure of centrifugal blower Download PDFInfo
- Publication number
- CN110439861A CN110439861A CN201810419371.1A CN201810419371A CN110439861A CN 110439861 A CN110439861 A CN 110439861A CN 201810419371 A CN201810419371 A CN 201810419371A CN 110439861 A CN110439861 A CN 110439861A
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- China
- Prior art keywords
- ring wall
- baffle
- cavity
- centrifugal blower
- volute
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- 238000005452 bending Methods 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 208000002925 dental caries Diseases 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 17
- 230000009467 reduction Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 241000237858 Gastropoda Species 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 210000004883 areola Anatomy 0.000 description 2
- 208000028659 discharge Diseases 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
Classifications
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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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
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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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
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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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable 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
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
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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 present invention relates to a kind of volute structures of centrifugal blower, including volute tongue, front shroud, back shroud and spiral case ring wall, spiral case ring wall includes the first ring wall and the second ring wall, first ring wall be connected between front shroud and back shroud and and front shroud, back shroud encloses spiral case cavity, second ring wall is set in spiral case cavity and spiral case cavity is divided into exocoel and inner cavity, the back edge of second ring wall is mutually connected with back shroud, the forward edge of second ring wall at least gradually tilts backwards downwards for exocoel and inner cavity to be connected from middle part, the air guide hole close to air outlet arrangement is provided in the axial direction on second ring wall.In centrifugal blower use process, fraction is discharged through exocoel from air outlet, another part air-flow is recycled to the air guide hole of inner cavity top through inner cavity and is discharged by air outlet, the setting of above-mentioned second ring wall plays good shunting function, to reduce gas backstreaming, reduce eddy current problem, to reduce fan noise, improve fan efficiency.
Description
Technical field
The present invention relates to range hood technical fields, refer specifically to a kind of volute structure of centrifugal blower.
Background technique
Domestic cooking fume remover uses multi-blade centrifugal fan, carries out air-breathing, exhaust.Blower is generally by spiral case, motor, impeller
Deng composition.Wherein tongue-shaped projection part is referred to as volute tongue in spiral case, and main function is to separate flowing gas, prevents gas in spiral case
Internal circulation flow.Due to gas pressure height, complex flow, the flow noise generated near volute tongue, rotational noise near volute tongue
It is the Main Noise Sources of centrifugal blower, reducing the noise near volute tongue can significantly reduce range hood noise.
Application publication number is a kind of Chinese patent application " volute of blower for range hood " (Shen of CN105526193A
Please number: CN201610111243.1) disclose a kind of structure comprising volute tongue, volute tongue include volute tongue inner wall, and volute tongue forms closing
Cavity, at least one longitudinal baffle is disposed with along the axis direction of spiral case in cavity, along the axis direction cloth of vertical spiral case
Multiple radial partitions are equipped with, the cavity is separated into multiple independent closed noise reduction cavitys by longitudinal baffle and radial partition,
Hole is offered in the corresponding volute tongue inner wall section of each noise reduction cavity.Cavity in volute tongue is separated into multiple independences by above structure
Closed areola, the hole thus opened up on areola and corresponding side wall forms Helmholtz resonator, according to Hai Muhuo
Hereby resonance principle, after sound transmission comes, close sound wave and resonator generate resonance with the resonator intrinsic frequency, are vibrating
In the process, the air column in cavity and cavity inner wall friction and sound energy consumption, to carry out sqouynd absorption lowering noise.
Above structure reduces fan noise by way of noise reduction cavity is arranged to a certain extent, still, due to snail
Space is smaller at tongue, and gas is difficult disposably to be discharged, and remaining gas is easy reflux and forms vortex, and fan efficiency is caused to drop
It is low, and vortex noise is generated, and then blower is caused still to there is biggish noise.
Summary of the invention
The technical problem to be solved by the invention for the present situation of prior art is to provide it is a kind of can effectively abolish vortex and
Gas backstreaming is reduced to reduce the volute structure of fan noise, the centrifugal blower for improving fan efficiency.
The technical scheme of the invention to solve the technical problem is: a kind of volute structure of centrifugal blower, including
Volute tongue, front shroud, back shroud and spiral case ring wall, the front shroud and back shroud time interval arrange that the spiral case ring wall is set to
Between front shroud and back shroud, the volute tongue is set to the air outlet in the first end of spiral case ring wall and close to spiral case and arranges, special
Sign is: the spiral case ring wall includes the first ring wall and the second ring wall, first ring wall be connected to front shroud and back shroud it
Between and with front shroud, back shroud enclose spiral case cavity, second ring wall is set in spiral case cavity and divides spiral case cavity
Back edge for exocoel and inner cavity, second ring wall is mutually connected with back shroud, and the forward edge of second ring wall is at least certainly
Middle part gradually tilts backwards for exocoel and inner cavity to be connected downwards, is provided in the axial direction on second ring wall close to outlet air
The air guide hole of mouth arrangement.
Preferably, the posterior edges of second ring wall are connected with the leading flank of back shroud, on front side of second ring wall
The top at edge is connected with the trailing flank of front shroud, and the minimum widith of second ring wall in the axial direction is maximum width
0.25~0.5 times.The central part of the front shroud offers air inlet, second ring wall and air inlet arranged concentric.It adopts
With the structure, in order to play preferable shunting function.
As an improvement, the volute tongue bottom is provided with opening corresponding with air guide hole, which is provided with can be by snail
Air-flow in shell inner cavity imports the flow-guiding structure at spiral case air outlet.Using the structure, directly air-flow is formed from the second ring wall
Inner cavity in be delivered at air outlet, can abolish well vortex and reduce gas backstreaming.
In the above scheme, the air guide hole is along the second ring wall axially through to make the second ring wall be formed as open loop knot
Structure, the first end of second ring wall and the volute tongue one side edge far from air outlet that is open are connected, and the of second ring wall
Two ends and volute tongue are formed with gap between the lower surface of air outlet.It is led using such structure when compressor flow is smaller
Flow structure can be at closed state, and the fraction shunted from the inner cavity that the second ring wall is formed is discharged and through going out from above-mentioned gap
Air port discharge.
As an improvement, the volute tongue has volute tongue inner wall, the two sides closing of the volute tongue is to form cavity, the volute tongue
Outside is provided with the first baffle extended along volute tongue outer wall into cavity, the top of the first baffle and corresponding volute tongue inner wall it
Between be formed with the flow-guiding channel, diversion cavity, the opening are enclosed between the lower part and cavity inner wall of the first baffle
It is opened in the bottom of diversion cavity, the flow-guiding channel and diversion cavity collectively form the flow-guiding structure.It is led using such
Flow structure, to abolish vortex and reduce gas backstreaming.
It improves again, the baffle that can opening covered or open opening is additionally provided in the diversion cavity.When blower compared with
Hour, opening can be covered by baffle, when compressor flow is larger, can be opened opening by baffle.
Preferably, it is provided with the sensor that can detect air force on the inner wall of second ring wall, is set in the volute tongue
It is equipped with the adjusting component that can be adjusted according to air force whether baffle is opened and closed relative to opening.Using the structure, when air quantity compared with
Hour, it adjusts component and does not act on, conventional structure, that is, meet demand of volute tongue adjusts component in distinguished and admirable impact when air quantity is larger
To the opening that will be open, performance abolishes vortex and reduces gas backstreaming function for lower drive baffle movement.
Preferably, the adjusting component includes linking arm, pin shaft and actuator, and the linking arm is set to the of baffle
One end is simultaneously connected on volute tongue side wall by pin shaft with being able to rotate, and the baffle is set to overthe openings and can drive with being able to rotate
Moving part is rotated by, and the second end of the baffle is rotatably mounted end.It is provided in the volute tongue and is arranged close to air side
Accommodating cavity, the actuator is motor in the accommodating cavity, and the output shaft of the motor is connected with the pin shaft.It adopts
With above structure, moved convenient for driving baffle, to realize opening or closing for opening.
It improves again, is provided with second baffle on the outside of the first baffle, the second baffle and volute tongue side wall, first baffle are total
With closed first cavity is enclosed, it is provided with first entered in the first cavity for air-flow self-conductance stream chamber on the first baffle and leads to
Hole.Preferably, the first baffle with a thickness of 1.5~2mm, the diameter of the first through hole is 1~1.8mm.Using in this way
Structure, it can be achieved that the secondary exclusion of reflux gas, and be further reduced vortex, meanwhile, first baffle, second baffle and the two
Between the first cavity can form noise elimination resonant structure, to inhibit the turbulence noise at this, realize noise reduction effect.
It is further improved, setting is parallel to the third baffle of second baffle arrangement, the third gear in first cavity
Plate and second baffle, volute tongue inner wall enclose the second cavity jointly, be provided in the third baffle for air-flow from the first cavity into
Enter the second through-hole of the second cavity.The third baffle with a thickness of 0.75~1mm, the diameter of second through-hole is 0.5~
0.75mm.Although above-mentioned first baffle, second baffle and the first cavity between the two form noise elimination resonant structure, but
Nonlinear acoustic resistance may be generated, and then forms quadratic noise, above-mentioned third baffle and the second cavity are set, can be inhibited wider
Noise band, preferably offset original noise, and there is higher acoustic absorptivity, final volute tongue under the conditions of realizing big flow
Locate the reduction of noise, the raising of vortex abolished with blower press, efficiency.
In the above embodiments, the volute tongue inner wall includes the first side plate bending, the second side plate bending and the first planar section, described
First side plate bending is close to the impeller arrangement of centrifugal blower and the first guide face of lower surface composition centrifugal blower, first plane
Section is set to the air outlet side of spiral case and inner surface constitutes the second guide face of centrifugal blower, and second side plate bending is connected to first
Between side plate bending and the first planar section.
For the ease of connection, the volute tongue top edge is connected with front shroud, back shroud top edge, the volute tongue lower edge
It is connected with the first end margin of spiral case ring wall and passes through silica gel sealing.
Preferably, the first baffle includes the second planar section and third side plate bending, and second planar section is close to first
Planar section arrangement, the upper end of the third side plate bending is mutually connected with the lower end of the second planar section, and the third side plate bending is to second
Side plate bending direction is arched upward and lower end is mutually connected with the upper surface of the first side plate bending.Between first planar section and the second planar section
The width of the flow-guiding channel of formation is gradually reduced from bottom to top.Diversion cavity is collectively formed with long and narrow flow-guiding channel in above structure
General shape is 6 structure, so that playing the role of good water conservancy diversion breaks whirlpool.
Preferably, the lower surface of the baffle is configured to the first cambered surface to arch upward downwards, corresponding, the opening two sides
Wall is formed to the mating surface to match with the first cambered surface.The upper surface of the baffle is formed with the second arc to arch upward upwards
Face, the radian of second cambered surface are greater than the radian of the first cambered surface, and the round and smooth mistake in junction of first cambered surface and the second cambered surface
It crosses.Above structure can reduce baffle to distinguished and admirable resistance.
Compared with the prior art, the advantages of the present invention are as follows: spiral case ring wall is divided into the first ring wall and the second ring by the present invention
Wall, spiral case cavity is divided into exocoel and inner cavity by first ring wall, the second ring wall, in centrifugal blower use process, fraction
It being discharged through exocoel from air outlet, another part air-flow is recycled to the air guide hole of inner cavity top through inner cavity and is discharged by air outlet,
The setting of above-mentioned second ring wall plays good shunting function, to reduce gas backstreaming, reduces eddy current problem, thus
It reduces fan noise, improve fan efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (being equipped with impeller) of the embodiment of the present invention；
Fig. 2 is the cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram of volute tongue in the embodiment of the present invention；
Fig. 4 is the assembling structure schematic diagram of baffle and linking arm, actuator in the embodiment of the present invention；
Fig. 5 is the cross-sectional view of volute tongue in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram that baffle is hidden in Fig. 5；
Fig. 7 is the enlarged structure schematic diagram of part A in Fig. 2.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Fig. 1~7, the volute structure of the centrifugal blower of the present embodiment include volute tongue 1, front shroud 2, back shroud 3 and
Spiral case ring wall 4, front shroud 2 and 3 time interval of back shroud arrange that spiral case ring wall 4 is connected between front shroud 2 and back shroud 3, snail
Tongue 1 is set in the first end of spiral case ring wall 4, a side wall of volute tongue 1 side wall and front shroud 2, rear cover opposite with spiral case ring wall 4
Plate 3 encloses air outlet 40 jointly.
In the present embodiment, spiral case ring wall 4 includes the first ring wall 41 and the second ring wall 42, and the first ring wall 41 is connected to front cover
Spiral case cavity is enclosed between plate 2 and back shroud 3 and with front shroud 2, back shroud 3, the second ring wall 42 is set in spiral case cavity 40
And spiral case cavity 40 is divided into exocoel 401 and inner cavity 402, the back edge of the second ring wall 42 is connected with 3 phase of back shroud, the second ring
The forward edge of wall 42 gradually tilts backwards downwards for exocoel 401 and inner cavity 402 to be connected from top, on the second ring wall 42
It is provided in the axial direction with the air guide hole 421 arranged close to air outlet 40.The posterior edges and rear cover of second ring wall 42 of the present embodiment
The leading flank of plate 3 is connected, and the top of 42 forward edge of the second ring wall is connected with the trailing flank of front shroud 2, the second ring wall 42
Minimum widith in the axial direction is 0.25~0.5 times of maximum width.The central part of front shroud 2 offers air inlet 21, the
Two ring walls 42 and 21 arranged concentric of air inlet, in order to play preferable shunting function.
1 bottom of volute tongue of the present embodiment is provided with opening 1111 corresponding with air guide hole 421, is arranged above the opening 1111
There is the flow-guiding structure that the air-flow in spiral case inner cavity 402 can be imported at spiral case air outlet 40.The structure is directly by air-flow from second
It is delivered at air outlet 40 in the inner cavity 402 that ring wall 42 is formed, vortex can be abolished well and reduces gas backstreaming.Air guide hole
421 along the second ring wall 42 axially through to make the second ring wall 42 be formed as open loop structure, the first end of the second ring wall 42 with
1111 one side edges far from air outlet 40 of opening of volute tongue 1 are connected, and the second end and volute tongue 1 of the second ring wall 42 are close to air outlet
Gap 420 is formed between 40 lower surface, when compressor flow is smaller, flow-guiding structure can be at closed state, from the second ring
The fraction shunted in the inner cavity 402 that wall 42 is formed is discharged from above-mentioned gap 420 and is discharged through air outlet 40.
The volute tongue 1 of the present embodiment has volute tongue inner wall 11, which includes the first side plate bending 111, the second cambered surface
Section 112 and the first planar section 113, impeller arrangement and lower surface composition centrifugal blower of first side plate bending 111 close to centrifugal blower
The first guide face, the first planar section 113 be set to spiral case 40 side of air outlet and inner surface constitute centrifugal blower the second water conservancy diversion
Face, the second side plate bending 112 are connected between the first side plate bending 111 and the first planar section 113.1 top edge of volute tongue of the present embodiment
It is connected with front shroud 2,3 top edge of back shroud by screw, 1 lower edge of volute tongue and the first end margin of spiral case ring wall 4 pass through
Screw connection is connected and passes through silica gel sealing.
1 two sides of volute tongue of the present embodiment are respectively arranged with a volute tongue side plate 12, and the volute tongue side plate 12 is by two side seals of volute tongue 1
It closes to be provided on the outside of the volute tongue 1 to forming cavity 10, being open corresponding to cavity 10 and extend along volute tongue outer wall into cavity 10
First baffle 13.First baffle 13 includes the second planar section 131 and third side plate bending 132, and the second planar section 131 is flat close to first
Face section 113 arranges that the upper end of third side plate bending 132 is mutually connected with the lower end of the second planar section 131, and third side plate bending 132 is to the
Two side plate bendings, 112 direction is arched upward and lower end is mutually connected with the upper surface of the first side plate bending 112.Second planar section of first baffle 13
113 are formed with long and narrow flow-guiding channel 14, and the width of the flow-guiding channel 14 between 131 and the first planar section of volute tongue inner wall 11
It is gradually reduced from bottom to top.Diversion cavity 15 is enclosed between 10 inner wall of lower part and cavity of first baffle 13, opening 1111 opens up
In in the first side plate bending 111 to supply stream enter diversion cavity 15 in.Above-mentioned flow-guiding channel 14 is collectively formed with diversion cavity 15 leads
Flow structure.The baffle 100 that opening 1111 can be covered or open opening 1111 is additionally provided in diversion cavity 15.Baffle
100 lower surface is configured to the first cambered surface 101 to arch upward downwards, corresponding, and 1111 two sidewalls of opening are formed to and the first arc
The mating surface 1112 that face 101 matches.The upper surface of baffle 100 is formed with the second cambered surface 102 to arch upward upwards, second arc
The radian in face 102 is greater than the radian of the first cambered surface 101, and the junction rounding off of the first cambered surface 101 and the second cambered surface 102,
The structure can reduce baffle 100 to distinguished and admirable resistance.The diversion cavity 15 of the present embodiment and the long and narrow common shape of flow-guiding channel 14
The structure for being 6 at general shape, so that playing the role of good water conservancy diversion breaks whirlpool.
The sensor 422 that can detect air force is provided on the inner wall of second ring wall 42, being provided in volute tongue 1 can basis
Air force adjusts the adjusting component 16 whether baffle 100 is opened and closed relative to opening 1111.Adjusting component 16 includes linking arm
161, pin shaft 162 and actuator 163, linking arm 161 are two and are connected to the two sides of 100 first end of baffle, connection
The other end of arm 161 is connected on volute tongue side plate 12 with being able to rotate by pin shaft 162, and junction is close to the second side plate bending 112
Arrangement.Baffle 100 is set to 1111 top of opening and can be rotated by actuator 163, the of baffle 100 with being able to rotate
Two ends are rotatably mounted end.The accommodating cavity 19 close to air side arrangement is provided in volute tongue 1, actuator 163 is set on the accommodating
The output shaft of motor in chamber 19, the motor is connected with pin shaft 162, to drive baffle 100 to move, to realize opening
1111 open or close.
In the present embodiment, it is provided with second baffle 17 on the outside of first baffle 13, the upper end of the second baffle 17 and first
The outlet air end of planar section 113 is connected, and the lower end of the second baffle 17 is connected with the outer end of the first planar section 113, thus
Closed first cavity 170 is enclosed jointly with volute tongue side plate 12, first baffle 13, is provided on first baffle 13 for air-flow self-conductance
Flow the first through hole 130 that chamber 15 enters in the first cavity 170.First baffle 13 with a thickness of 1.5~2mm, first through hole 130
Diameter is 1~1.8mm.Setting is parallel to the third baffle 18 of the arrangement of second baffle 17, the third baffle in first cavity 170
18 enclose the second cavity 180 with second baffle 17, volute tongue inner wall jointly, are provided in third baffle 18 for air-flow from the first cavity
17 enter the second through-hole 181 of the second cavity 18.Third baffle 18 with a thickness of 0.75~1mm, the diameter of the second through-hole 181 is
0.5~0.75mm.Although above-mentioned first baffle 13, second baffle 17 and the first cavity 170 between the two form noise elimination
Resonant structure it is also possible to nonlinear acoustic resistance can be generated, and then forms quadratic noise, above-mentioned third baffle 18 and the second chamber is arranged
Body 180 can inhibit broader noise band, preferably offset original noise, and have higher acoustic absorptivity, final real
The reduction of noise, the raising of vortex abolished with blower press, efficiency at volute tongue under the conditions of existing big flow.
Using the volute structure of the present embodiment, when compressor flow is smaller, noise is smaller, and baffle 100 will be open 1111
It closes, fraction is discharged through exocoel 401 from air outlet 40, and another part air-flow is recycled to 402 top of inner cavity through inner cavity 402
Air guide hole 421 and gap 420 are simultaneously discharged by air outlet 40；When compressor flow is larger, reflux of the gas at volute tongue 1 increases,
When sensor 422 detects that air quantity reaches certain numerical value, controller controls actuator 163 and baffle 100 is driven to rotate, and will be open
1111 open, at this point, portion gas enters in diversion cavity 15 through air guide hole 421, opening 1111, the gas into diversion cavity 15
Part is directly over after long and narrow flow-guiding channel 14 accelerates and is discharged from air outlet 40, and another part passes through the on first baffle 13
One through-hole 130 the first cavity 170 of entrance, after being then passed through the second through-hole 181 entrance the second cavity 180 circulation in third baffle 18
It is discharged from flow-guiding channel 14, realizes the secondary discharge of reflux gas, reduce gas backstreaming, abolished eddy current problem, thus
It reduces fan noise, improve fan efficiency；And the noise elimination resonant structure that first baffle, second baffle, third baffle are formed
It can inhibit turbulence noise, inhibit broader noise band, preferably offset original noise, and there is higher sound absorption system
Number, the finally reduction of noise, the raising of vortex abolished with blower press and efficiency at volute tongue under the conditions of realization big flow.
Claims (20)
1. a kind of volute structure of centrifugal blower, including volute tongue (1), front shroud (2), back shroud (3) and spiral case ring wall (4), institute
Front shroud (2) and back shroud (3) time interval is stated to arrange, the spiral case ring wall (4) be set to front shroud (2) and back shroud (3) it
Between, the volute tongue (1) is set to the air outlet (40) in the first end of spiral case ring wall (4) and close to spiral case and arranges, it is characterised in that:
The spiral case ring wall (4) includes the first ring wall (41) and the second ring wall (42), and first ring wall (41) is connected to front shroud (2)
Spiral case cavity is enclosed between back shroud (3) and with front shroud (2), back shroud (3), second ring wall (42) is set to spiral case
Exocoel (401) and inner cavity (402), the back edge and back shroud of second ring wall (42) are divided into cavity and by spiral case cavity
(3) mutually it is connected, the forward edge of second ring wall (42) is at least gradually tilted backwards downwards from middle part thus by exocoel (401)
And inner cavity (402) are connected, and the air guide hole close to air outlet (40) arrangement is provided in the axial direction on second ring wall (42)
(421)。
2. the volute structure of centrifugal blower according to claim 1, it is characterised in that: the rear side of second ring wall (42)
Edge is connected with the leading flank of back shroud (3), behind the top and front shroud (41) of the second ring wall (42) forward edge
Side is connected, and the minimum widith of second ring wall (42) in the axial direction is 0.25~0.5 times of maximum width.
3. the volute structure of centrifugal blower according to claim 1, it is characterised in that: the central portion of the front shroud (2)
Position offers air inlet (21), second ring wall (42) and air inlet (21) arranged concentric.
4. the volute structure of centrifugal blower according to claim 1, it is characterised in that: volute tongue (1) bottom be provided with
The corresponding opening (1111) of air guide hole (421), the opening (1111) top is provided with can be by the air-flow in spiral case inner cavity (402)
Import the flow-guiding structure at spiral case air outlet (40).
5. the volute structure of centrifugal blower according to claim 4, it is characterised in that: the air guide hole (421) is along second
Ring wall (42) axially through to make the second ring wall (42) be formed as open loop structure, the first end of second ring wall (42) with
Volute tongue opening (1111) is connected far from the one side edge of air outlet (40), the second end and volute tongue of second ring wall (42)
(1) gap (420) are formed between the lower surface of air outlet (40).
6. the volute structure of centrifugal blower according to claim 4, it is characterised in that: the volute tongue (1) has in volute tongue
Wall (11), the two sides closing of the volute tongue (1) are provided with along volute tongue (1) outside on the outside of the volute tongue (1) to be formed cavity (10)
The first baffle (13) that wall extends into cavity (10), between the top of the first baffle (13) and corresponding volute tongue inner wall (11)
It is formed with the flow-guiding channel (14), encloses diversion cavity between the lower part and cavity (10) inner wall of the first baffle (13)
(15), the bottom for being opened in diversion cavity (15), the flow-guiding channel (14) and diversion cavity (15) collectively form institute
The flow-guiding structure stated.
7. the volute structure of centrifugal blower according to claim 6, it is characterised in that: also set up in the diversion cavity (15)
There is the baffle (100) for (1111) opening that opening (1111) can be covered or will be open.
8. the volute structure of centrifugal blower according to claim 7, it is characterised in that: the inner wall of second ring wall (42)
On be provided with the sensor (422) that can detect air force, be provided on the volute tongue (1) can according to air force adjust water conservancy diversion
Adjusting component (16) whether block (100) is opened and closed relative to opening (1111).
9. the volute structure of centrifugal blower according to claim 8, it is characterised in that: the adjusting component (16) includes
Linking arm (161), pin shaft (162) and actuator (163), the linking arm (161) are set to the first end of baffle (100) and lead to
It crosses pin shaft (162) to be connected to being able to rotate on volute tongue (1) side wall, the baffle (100) is set to opening (1111) with being able to rotate
Top can be simultaneously rotated by actuator (163), and the second end of the baffle (100) is rotatably mounted end.
10. the volute structure of centrifugal blower according to claim 9, it is characterised in that: be provided with and lean in the volute tongue (1)
The accommodating cavity (19) of nearly air side arrangement, the actuator (163) are the motor in the accommodating cavity (19), the motor
Output shaft is connected with the pin shaft (162).
11. the volute structure of centrifugal blower according to claim 6, it is characterised in that: on the outside of the first baffle (13)
Second baffle (17) are provided with, the second baffle (17) and volute tongue side wall, first baffle (13) enclose closed first jointly
Cavity (170), be provided on the first baffle (13) enter for air-flow self-conductance stream chamber (15) it is first logical in the first cavity (170)
Hole (130).
12. the volute structure of centrifugal blower according to claim 11, it is characterised in that: the thickness of the first baffle (13)
Degree is 1.5~2mm, and the diameter of the first through hole (130) is 1~1.8mm.
13. the volute structure of centrifugal blower according to claim 11, it is characterised in that: in first cavity (170)
The third baffle (18) for being parallel to second baffle (17) arrangement, the third baffle (18) and second baffle (17), volute tongue are set
Inner wall encloses the second cavity (180) jointly, is provided on the third baffle (18) and enters the from the first cavity (170) for air-flow
The second through-hole (181) of two cavitys (180).
14. the volute structure of centrifugal blower according to claim 13, it is characterised in that: the thickness of the third baffle (18)
Degree is 0.75~1mm, and the diameter of second through-hole (181) is 0.5~0.75mm.
15. the volute structure of the centrifugal blower according to any claim in claim 6~14, it is characterised in that: institute
Stating volute tongue inner wall (11) includes the first side plate bending (111), the second side plate bending (112) and the first planar section (113), first arc
Face section (111) is close to the impeller arrangement of centrifugal blower and the first guide face of lower surface composition centrifugal blower, first plane
Section (113) is set to air outlet (40) side of spiral case and inner surface constitutes the second guide face of centrifugal blower, second side plate bending
(112) it is connected between the first side plate bending (111) and the first planar section (112).
16. the volute structure of centrifugal blower described in any claim according to claim 1~14, it is characterised in that: institute
It states volute tongue (1) top edge to be connected with front shroud (2), back shroud (3) top edge, volute tongue (1) lower edge and spiral case ring wall
(4) the first end margin is connected and passes through silica gel sealing.
17. the volute structure of centrifugal blower according to claim 15, it is characterised in that: the first baffle (13) includes
Second planar section (131) and third side plate bending (132), second planar section (131) close first planar section (113) arrangement,
The upper end of the third side plate bending (132) is mutually connected with the lower end of the second planar section (131), the third side plate bending (132) to
Second side plate bending (112) direction is arched upward and lower end is mutually connected with the upper surface of the first side plate bending (111).
18. the volute structure of centrifugal blower according to claim 17, it is characterised in that: first planar section (113)
The width of the flow-guiding channel (14) formed between the second planar section (131) is gradually reduced from bottom to top.
19. the volute structure of the centrifugal blower according to any claim in claim 7~10, it is characterised in that: institute
The lower surface for stating baffle (100) is configured to the first cambered surface (101) to arch upward downwards, corresponding, described opening (1111) two sides
Wall is formed to the mating surface (1112) to match with the first cambered surface (101).
20. the volute structure of centrifugal blower according to claim 19, it is characterised in that: the baffle (100) it is upper
Surface is formed with the second cambered surface (102) to arch upward upwards, and the radian of second cambered surface (102) is greater than the arc of the first cambered surface (102)
Degree, and the junction rounding off of first cambered surface (101) and the second cambered surface (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810419371.1A CN110439861A (en) | 2018-05-04 | 2018-05-04 | A kind of volute structure of centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810419371.1A CN110439861A (en) | 2018-05-04 | 2018-05-04 | A kind of volute structure of centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110439861A true CN110439861A (en) | 2019-11-12 |
Family
ID=68427899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810419371.1A Pending CN110439861A (en) | 2018-05-04 | 2018-05-04 | A kind of volute structure of centrifugal blower |
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| Country | Link |
|---|---|
| CN (1) | CN110439861A (en) |
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| CN112253543A (en) * | 2020-09-30 | 2021-01-22 | 宁波方太厨具有限公司 | Volute, centrifugal fan applying volute and range hood |
| CN114251304A (en) * | 2020-09-25 | 2022-03-29 | 佛山市顺德区美的洗涤电器制造有限公司 | Volute tongue, centrifugal fan and range hood |
| CN114508508A (en) * | 2020-11-16 | 2022-05-17 | 广东美的白色家电技术创新中心有限公司 | Fan and lampblack absorber |
| CN114738835A (en) * | 2022-04-20 | 2022-07-12 | 珠海格力电器股份有限公司 | Fresh air device, air conditioner and fresh air control method |
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| CN114508508A (en) * | 2020-11-16 | 2022-05-17 | 广东美的白色家电技术创新中心有限公司 | Fan and lampblack absorber |
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| CN114738835A (en) * | 2022-04-20 | 2022-07-12 | 珠海格力电器股份有限公司 | Fresh air device, air conditioner and fresh air control method |
| CN114738835B (en) * | 2022-04-20 | 2024-02-27 | 珠海格力电器股份有限公司 | Fresh air device, air conditioner and fresh air control method |
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