CN104343727B - Centrifugal air blower and vehicle-mounting air-conditioning apparatus comprising same - Google Patents
Centrifugal air blower and vehicle-mounting air-conditioning apparatus comprising same Download PDFInfo
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- CN104343727B CN104343727B CN201410365807.5A CN201410365807A CN104343727B CN 104343727 B CN104343727 B CN 104343727B CN 201410365807 A CN201410365807 A CN 201410365807A CN 104343727 B CN104343727 B CN 104343727B
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- air
- centrifugal fan
- centrifugal blower
- wall
- stream
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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
- F04D29/441—Fluid-guiding means, e.g. diffusers 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
- F04D29/40—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
A centrifugal air blower and vehicle-mounting air-conditioning apparatus capable of improving air flow amount. The centrifugal blower (1) comprises: a multifin centrifugal fan (3), having a plurality of blades (8) arranged around a rotating shaft (6); a scroll-shaped casing (4) accommodating the centrifugal fan (3) and having an air suction inlet (11) and a flow passage vortex-shaped flow path (12) as a flow path for air from multiple fins centrifugal fan exhaust air; and a diffuser portion (5), which has a expanded stream path (19) and an outlet (20), wherein the downstream end of the vortex-shaped flow path (12) is communiated with the expanded stream path (19), and changes the height of the flow path in a manner of the cross-sectional area increasing with downstream side of the air flow. The outlet is opened at the downstream of the expanded stream path. The centrifugal blower is provided with multiple fins from centrifugal fan exhaust air flow rate uniform distribution of the upstream distribution equalizing element (18), wherein the upper side wall (21) of the diffuser portion of the inclined starting position than the lower side wall disposed in the diffuser portion (22) is inclined starting position closer to the air flow position side.
Description
Technical field
The present invention relates to a kind of centrifugal blower and the air conditioner for motor vehicle including the centrifugal blower, more particularly, it relates to
Centrifugal blower and air conditioner for motor vehicle that a kind of shape in the bubbler portion to centrifugal blower is improved.
Background technology
This centrifugal blower is accommodated with multiblade centrifugal fan in volute casing, and the multiblade centrifugal fan has
Be configured in and turn axial more blades perhaps, vortex shape is formed around the multiblade centrifugal fan in the volute casing
Stream.When driving multiblade centrifugal fan to rotate when using driving sources such as electro-motors, from the suction for being formed at volute casing
Air is attracted to entrance the inner side of multiblade centrifugal fan, and the air is discharged to the radial direction of multiblade centrifugal fan
Outside, and above-mentioned air is blown out from the blow-off outlet in the downstream for being formed at air stream via vortex shape stream.
So, due to this centrifugal blower be from one side of axis direction of rotating shaft suction air, and to multiblade from
The radial outside of core type fan changes the structure that air is discharged by flow direction, it is thus known that in general from multiblade from
Core type fan discharge air air-flow have towards with the direction set of the suction inlet opposite side (lower plate side) of volute casing in
Trend.
It is as this centrifugal blower, such as known to have patent documentation 1 and centrifugal blower disclosed in patent documentation 2.
In centrifugal blower disclosed in patent documentation 1, as shown in figure 8, utilizing horn mouth (Japanese：ベ Le マ ウ ス) will
Air is efficiently sucked from outside, wherein, above-mentioned horn mouth is by making the upper plate of the volute casing of suction inlet periphery towards multiple wing
The blade lateral bend of piece centrifugal fan and formed.In above-mentioned centrifugal blower, when using multiblade centrifugal fan
Rotation come make air from suction inlet flow into when, as shown in figure 8, in the suction inlet side (upper plate side) of volute casing, because in horn mouth
Multiblade centrifugal fan side front end at there is the stripping of air stream, and air does not have the suction effluent to blade substantially
Enter, and become the state of stagnation.Thereby, from blade discharge air flowing towards in the direction set of the lower plate side of volute casing,
Therefore, the velocity flow profile of the air discharged from blade is locally accelerated at lower plate side, and becomes the main cause for producing noise.
In addition, in centrifugal blower disclosed in patent documentation 2, as multiblade centrifugal fan, being formed by adopting
It is external diameter with the fan of the rounding frustum shape increased to suction inlet side, so that the flow velocity point of the air discharged from blade
Cloth homogenization, thereby realizing the reduction of noise.In above-mentioned centrifugal blower, with centrifugal blower disclosed in patent documentation 1
Compare, although the flowing of the air discharged from blade is improved to the concentration of lower plate side, but still can be to the direction of lower plate side
Concentrate.
In addition, the centrifugal blower of above-mentioned patent documentation 1 and patent documentation 2 is used for example as air conditioner for motor vehicle (HVAC)
Blowing unit, terminates to be provided with the exit portion and temperature of the vortex shape stream of volute casing at portion in the scrollwork of volute casing
The bubbler portion of the intake section connection of adjustment unit.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Patent Laid-Open 2008-280939 publication
Patent documentation 2：Japanese Patent Laid-fair 7-94838 publication
The content of the invention
Invent technical problem to be solved
Here, the present inventor is confirmed in bell-mouthed centrifugal blower is provided with the same manner as patent documentation 1,
If improving above-mentioned bell-mouthed height, the stripping occurred in the end of bell-mouthed multiblade centrifugal fan side can be suppressed
From.Additionally, by PIV (particle image velocimetry method (Particle Image Velocimetry)) visualized experiments to from upper
State the air of multiblade centrifugal fan discharge flowing observed after understand, if improving bell-mouthed height, from multiple wing
Piece centrifugal fan discharge air velocity flow profile homogenization, and shown in air towards the lower plate side of flow direction, Fig. 8 this
The extreme deflection of sample is reduced.
In addition, the present inventor is being sent using the centrifugation of the fan of rounding frustum shape in the same manner as patent documentation 2
In blower fan, the external diameter of the fan of suction inlet side is made further to increase, and can after having carried out PIV visualized experiments as described above
Know, the flow direction of the air discharged from the multiblade centrifugal fan compared with the centrifugal blower of patent documentation 2, air court
The extreme deflection of the lower plate side of volute casing is reduced.
By the fan for so improving the suction inlet side of the fan of bell-mouthed height or increase rounding frustum shape
External diameter, can make what is produced because of frictional resistance etc. at the lower plate of volute casing and the lower wall with the continuous bubbler portion of lower plate
The pressure loss is reduced, therefore, in the case of the output identical of the power sources such as electro-motor, increase can air quantity, in air quantity phase
With in the case of, decline can the output of power source.
If however, it is possible to knowing the suction inlet one of the fan for improving bell-mouthed height or increase rounding frustum shape
The outer diameter fan of side, although the extreme deflection without flow direction as shown in Fig. 8, but flow direction occurs on the contrary
Towards upper plate lateral deviation to situation.
In this case, due to be not flow direction extreme deflection, therefore, with patent documentation 1 and patent documentation 2
Disclosed centrifugal blower is compared, can air quantity increased as mentioned above, but, due to the stream of air flowed in volute casing
Dynamic direction towards upper plate lateral deviation to, therefore, pressure can lose and rubbing at the upper side wall in the upper plate of volute casing and bubbler portion
Wiping etc. is corresponding to measure, thus, there is the leeway that improve can air quantity, and be desired with improving.
Currently invention addresses above-mentioned this practical situation and make, its object is to provide a kind of centrifugal blower and including should
The air conditioner for motor vehicle of centrifugal blower, in above-mentioned centrifugal blower, when to bell-mouthed shape and the centrifugal wind of multiblade
The shape of fan is improved, make from multiblade centrifugal fan discharge air velocity flow profile homogenization in the case of, energy
It is enough more efficiently to improve air quantity.
Solve the technical scheme adopted by technical problem
The one side of centrifugal blower of the invention, centrifugal blower include：Multiblade centrifugal fan, the multiple wing
, with a turn axial multiple blades are configured in, above-mentioned multiblade centrifugal fan is from the axle center of above-mentioned rotating shaft for piece centrifugal fan
Direction draws air into and discharges to radial outside；Volute casing, the volute casing are carried out to above-mentioned multiblade centrifugal fan
Storage, and with the suction inlet for sucking above-mentioned air and the stream as the air discharged from above-mentioned multiblade centrifugal fan
Vortex shape stream；And bubbler portion, the bubbler portion has and expands stream and blow-off outlet, wherein, above-mentioned expansion stream is
The stream connected with the downstream of the air flow of above-mentioned vortex shape stream, and so that the sectional area of above-mentioned stream is with direction
The downstream of air flow and the path heights of the mode that expands to make the axis direction of above-mentioned rotating shaft change, and above-mentioned blow-off outlet exists
The downstream-end opening of the air flow of above-mentioned expansion stream, above-mentioned centrifugal blower has to be made from above-mentioned multiblade centrifugal fan
Flow velocity, the distribution uniformity element of distribution uniformity on the axis direction of above-mentioned rotating shaft of the air of discharge, above-mentioned expansion
Scattered device portion is the upper side wall for making above-mentioned suction inlet side and the lower wall faced with the upper side wall with towards the downstream of air flow
Side and separate towards each other direction inclines, the starting position that inclines of above-mentioned upper side wall is arranged on the inclination than above-mentioned lower wall and opens
The position of the upstream side of air flow is more leaned in beginning position.
The one side of air conditioner for motor vehicle of the invention, is formed as including above-mentioned centrifugal blower and temperature adjustment list
Unit, wherein, said temperature adjustment unit is using heat exchanger to the sky sent from the above-mentioned bubbler portion of above-mentioned centrifugal blower
The temperature of gas is adjusted and is blown out in car room.
Invention effect
The centrifugal blower of the present invention and including the centrifugal blower air conditioner for motor vehicle due to including making from multiblade
Centrifugal fan discharge air velocity flow profile homogenization distribution uniformity element, and by the upper side wall in bubbler portion from
More start to incline by the position of the upstream side of air flow than the starting position that inclines of the lower wall in bubbler portion, accordingly, it is capable to sharp
Velocity flow profile homogenization is made with distribution uniformity element, even as a result, the air discharged from multiblade centrifugal fan
Flowing towards volute casing by suction inlet side direction there is deflection in the state of reach the expansion stream in bubbler portion
In the case of, due to making upper side wall expand inclination earlier than lower wall, accordingly, it is capable to the air for making to flow about in upper side wall
The flow velocity of the air that velocity ratio is flowed about in lower wall quickly declines, can efficiently reduce because and with upper side wall collision
Friction of air stream etc. and the pressure loss that causes.
In addition, for example, in the state of the flowing of air occurs deflection towards the direction of upper side wall, upper side wall is made with
At the wall identical position of side or than lower wall more by air flow downstream position at start it is inclined in the case of, hold
Easily stagnant areas are produced near lower wall, as a result, the loss that can be under pressure, but in the centrifugal blower of the present invention,
Due to making upper side wall start to incline in the position of the inclination starting position upstream side than lower wall, therefore, in this
The pressure loss can also be efficiently reduced.
So, in the distribution uniformity of the velocity flow profile homogenization including the air for making from multiblade centrifugal fan to discharge
In the structure of element, even if the flowing of air occurs deflection towards the direction of upper side wall, also can efficiently reduce in bubbler portion
Because of the pressure loss of above-mentioned deflection, therefore, it is possible to efficiently improve air quantity.
Description of the drawings
Fig. 1 is the longitudinal section of the schematic construction of the centrifugal blower for representing first embodiment of the invention.
Fig. 2 is the line A-A regarding sectional view shown in Fig. 1.
Fig. 3 is the schematic diagram of the air conditioner for motor vehicle for including the centrifugal blower shown in Fig. 1.
Fig. 4 be represent the air in the centrifugal blower shown in Fig. 1 flow direction and the suction of of velocity flow profile
The schematic diagram of mouth and blade-section.
Fig. 5 is the longitudinal section of the schematic construction of the centrifugal blower for representing second embodiment of the invention.
Fig. 6 be represent the air in the centrifugal blower shown in Fig. 5 flow direction and the suction of of velocity flow profile
The schematic diagram of mouth and blade-section.
Fig. 7 is the axonometric chart of the centrifugal blower of third embodiment of the invention.
Fig. 8 be represent the flow direction of the air in existing centrifugal blower and the suction inlet of of velocity flow profile and
The schematic diagram of blade-section.
(symbol description)
1 ... centrifugal blower
3 ... multiblade centrifugal fans
4 ... volute casings
5 ... bubbler portions
6 ... rotating shafts
8 ... blades
11 ... suction inlets
12 ... vortex shape streams
14 ... tongues
15 ... upper plates
16 ... lower plates
17 ... erect wall
18 ... by suction inlet side face (horn mouth)
19 ... expand stream
20 ... blow-off outlets
21 ... upper side walls
22 ... lower walls
100 ... air conditioner for motor vehicle
102 ... thermostat units
E ... scrollworks terminate portion
Specific embodiment
Hereinafter, referring to the drawings, embodiments of the present invention are illustrated.
Fig. 1 represents the longitudinal section of the centrifugal blower 1 of first embodiment of the invention.Fig. 2 is the line A-A shown in Fig. 1
Regarding sectional view.
The centrifugal blower 1 of present embodiment include electro-motor 2 as driving element, driven by electro-motor 2 and
The multiblade centrifugal fan 3 of rotation, volute casing 4 and bubbler portion 5.
As shown in figure 3, the centrifugal blower 1 of present embodiment is used for example as the blowing unit of air conditioner for motor vehicle 100
101, the centrifugal blower 1 is configured between outside air switching air door (not shown) and thermostat unit 102.
The rotating shaft 6 that above-mentioned electro-motor 2 is connected with the protuberance 7B described later with multiblade centrifugal fan 3, makes to turn
Axle 6 rotates, and drives multiblade centrifugal fan 3 to rotate.
Above-mentioned multiblade centrifugal fan 3 is configured to base plate 7, blade 8 and annular flange 9, by air from rotating shaft 6
Axis direction suck and be radially oriented outside discharge.
Above-mentioned base plate 7 is swelled substantially in the axis direction (11 side of suction inlet described later) that central part is formed with towards rotating shaft 6
Cone shape tapered portion 7A.Protuberance 7B is formed with the central authorities of above-mentioned tapered portion 7A, protuberance 7B is turned with electro-motor 2
Axle 6 is fitted together to.The peripheral part of base plate 7 is in flange shape, and the cardinal extremity of more blades (fin) 8 is separately fixed at above-mentioned base plate 7 perhaps
On peripheral part.
Each above-mentioned blade 8 is configured in around rotating shaft 6, and the interval for having regulation is guaranteed between these blades 8.In this embodiment party
In formula, each blade 8 is configured towards the direction with the axis parallel of rotating shaft 6.
Above-mentioned annular flange 9 is coaxially disposed with base plate 7, and the leading section of blade 8 is connected.
Above-mentioned volute casing 4 is made up of hard resin etc., and multiblade centrifugal fan 3 is received, above-mentioned volute
Shell 4 is configured to the suction inlet 11 towards 9 one side opening of annular flange and as the sky discharged from multiblade centrifugal fan 3
The vortex shape stream 12 of the stream of gas.In addition, downstream end opening of the volute casing 4 in the air flow of vortex shape stream 12,
Bubbler portion 5 is connected with above-mentioned downstream side, and is connected with the expansion stream described later 19 in bubbler portion 5.
Specifically, volute casing 4 be formed as including the periphery wall 13 being radially arranged along multiblade centrifugal fan 3,
Tongue 14, upper plate 15 and lower plate 16.
Helically extension of the above-mentioned periphery wall 13 in regulation, and with as scrollwork initial part S from spiral is towards multiple wing
The direction of rotation of piece centrifugal fan 3 angle increase, i.e. with towards the downstream of air stream, away from the radial direction at 6 center of rotating shaft
The mode that distance gradually expands is bent to form.Periphery wall 13 will connect between the outer rim of the outer rim of upper plate 15 and lower plate 16.Periphery
Wall 13 is formed as the radial outside in multiblade centrifugal fan 3 together with upper plate 15 and lower plate 16 and marks off and spirally prolong
The above-mentioned vortex shape stream 12 stretched.
Above-mentioned tongue 14 is connected with scrollwork initial part S of periphery wall 13, and towards the radial outside Curved of volute casing 4
Into wall.Radial distance between periphery wall 13 and multiblade centrifugal fan 3 is minimum at tongue 14.Tongue 14 is located at and is vortexed
The upstream end of the air flow of shape stream 12, plays suppression air and terminates portion E to scrollwork starting from the scrollwork of vortex shape stream 12
The effect that portion S is flowed into.
Above-mentioned upper plate 15 be positioned at 9 side of annular flange, and parallel to the wall of the plane orthogonal with the axle center of rotating shaft 6, on
State upper plate 15 suction inlet 11 is being offered with 3 corresponding position of multiblade centrifugal fan.
It is formed with the upper plate 15 of the periphery of suction inlet 11 and erects wall 17, the above-mentioned wall 17 that erects is with from 15 court of upper plate
The direction separated with multiblade centrifugal fan 3 is after generally perpendicularly (towards the axis direction of rotating shaft 6) is erected, to suction inlet 11 1
The shape that side is turned back, the face by 11 side of suction inlet for erecting wall 17 are bent in bell mouth shape.Hereinafter, by above-mentioned bending
Part is referred to as horn mouth 18.Additionally, being formed with suction inlet 11 in the inner side of above-mentioned horn mouth 18, the bore of suction inlet 11 is set as
It is more slightly smaller than the internal diameter of annular flange 9.
So, it is to form the erecting of erecting of axis direction towards rotating shaft 6 in the periphery of suction inlet 11 in the present embodiment
Wall 17, and the face (18) by 11 side of suction inlet for erecting wall 17 is bent in bell mouth shape.In addition, for above-mentioned loudspeaker
The effect of mouth 18, will be described in detail below.
Above-mentioned lower plate 16 is positioned at 7 side of base plate (2 side of electro-motor) and parallel to the plane orthogonal with the axle center of rotating shaft 6
Wall.The electro-motor installing hole chimeric with the main body of electro-motor 2 is formed with lower plate 16.
Above-mentioned bubbler portion 5 is configured to have：Expand stream 19, the expansion stream 19 is the air with vortex shape stream 12
The stream of the downstream connection of flowing, and in the way of the sectional area of the stream expands with the downstream towards air flow
The path heights of the axis direction of rotating shaft 6 are made to change；And blow-off outlet 20, air of the blow-off outlet 20 in expansion stream 19
The downstream-end opening of flowing.
Centrifugal blower 1 is being used as into sending for air conditioner for motor vehicle (HVAC) 100 (with reference to Fig. 3) as in the present embodiment
In the case of wind unit 101, centrifugal blower 1 (blowing unit 101) is connected with thermostat unit 102.In this case,
The housing 102a of the size (size of the above-below direction in Fig. 3) in the height direction of volute casing 4 and thermostat unit 102
Size in the height direction is different, therefore, when the housing 102a of volute casing 4 and thermostat unit 102 is directly connected to,
The pressure loss caused along with drastically expanding for flow path area can occur.Therefore, volute casing 4 is by bubbler portion 5
It is connected with the housing 102a of thermostat unit 102, so that the flow path cross sectional area of volute casing 4 gradually expands.In addition, for upper
The effect in bubbler portion 5 is stated, be will be described in detail below.
Specifically, as shown in Figures 1 and 2, bubbler portion 5 is formed as the upside with the wall as 11 side of suction inlet
Wall 21, the lower wall 22 relative with above-mentioned upper side wall 21, planar portions 23 and tangent line portion 24.Additionally, on bubbler portion 5 is configured to
Side wall 21 and lower wall 22 direction separate towards each other with the downstream towards air flow inclines.
Above-mentioned upper side wall 21 is formed in the 15 continuous mode of upper plate with volute casing 4, and with the rule from upper side wall 21
Surely it is positioned against the downstream of air flow and inclines towards the direction separated with lower wall 22.The inclination of above-mentioned upper side wall 21 starts
Position be set in than lower wall 22 incline starting position more by air flow upstream side.In the present embodiment, upper side wall
Terminate portion's side end positioned at the scrollwork terminated including the end of portion E sides including scrollwork of volute casing in 21 starting position that inclines
Near.
Above-mentioned lower wall 22 is formed in the 16 continuous mode of lower plate with volute casing 4, and with the rule from lower wall 22
Surely it is positioned against the downstream of air flow and inclines towards the direction separated with upper side wall 21.In the present embodiment, under above-mentioned
Side wall 22 incline starting position be located at lower wall 22 including the tongue including the position corresponding with tongue near.
Above-mentioned planar portions 23 are the tangential directions and tongue 14 at the curved end of the tongue 14 of volute casing 4 along tongue 14
The lingual side outer rim of upper side wall 21 is connected by continuous planar wall, above-mentioned planar portions 23 with the lingual side outer rim of lower wall 22.
Above-mentioned tangent line portion 24 is that the scrollwork of the spiral of the periphery wall 13 in volute casing 4 terminates to terminate portion E along scrollwork at portion E
Tangential direction and scrollwork terminate the continuous planar walls of portion E, above-mentioned tangent line portion 24 is by the outer circumferential side outer rim of upper side wall 21 and downside
The outer circumferential side outer rim connection of wall 22.
Using above-mentioned upper side wall 21, lower wall 22, planar portions 23 and tangent line portion 24, divide formation and connect with vortex shape stream 12
Logical above-mentioned expansion stream 19.
Then, by comparing with the common bell-mouthed situation shown in Fig. 8, to the present embodiment shown in Fig. 4
The effect of horn mouth 18 is illustrated.
Can confirming, so arranging the height that wall 17 erected to make horn mouth 18 in present embodiment as shown in Figure 4 compares Fig. 8
End (the ring-type wheel by multiblade centrifugal fan side of horn mouth 18 when shown existing horn mouth is high, can be suppressed
9 side of edge) stripping.It is contemplated that this is as the length of lead of the air importing in horn mouth 18 is elongated, by wall attachment effect
The reason that the rectified action of generation is strengthened.
Additionally, by PIV (particle image velocimetry method) visualized experiments to the air discharged from multiblade centrifugal fan 3
Flowing in the volute casing 4 and bubbler portion 5 is observed and understands, if improving the height for erecting wall 17, from multiblade from
Core type fan 3 discharge air velocity flow profile homogenization, and towards shown in the 16 side of lower plate of flow direction, Fig. 8 so
Extreme deflection reduce.It is contemplated that this is as the height by improving horn mouth 18 is increasing the length of lead of air,
Rectified action to make horn mouth 18 is strengthened, as a result, the air along the flowing of horn mouth 18 is being flowed into through suction inlet 11
After in multiblade centrifugal fan 3, attracted by the radial outside to multiblade centrifugal fan 3 at once, the direction of flowing than
Existing horn mouth shown in Fig. 8 is easier to the radial outside of multiblade centrifugal fan 3 to change.
In the present embodiment, by " erecting wall towards what the axis direction of rotating shaft 6 was erected in the periphery formation of suction inlet 11
17, and make the structure that the face by 11 side of suction inlet for erecting wall 17 is bent in bell mouth shape (that is, make the guiding of air long
Degree increase after horn mouth 18) ", make from multiblade centrifugal fan 3 discharge air it is flow velocity, in the axle center side of rotating shaft 6
Distribution uniformity upwards.In addition, in the present embodiment, above-mentioned " horn mouth 18 after increasing the length of lead of air " phase
When in " the distribution uniformity element " of the present invention.
In addition, in the case of increasing the length of lead of air the height of horn mouth 18 is improved as mentioned above so, though
So there is no an extreme deflection of existing flow direction as shown in Figure 8, but as shown in figure 4, the flow direction of air sometimes
Can be slightly offset towards 15 side of upper plate.
Then, situation about be slightly offset towards 15 side of upper plate for the flow direction of air as shown in Figure 4, to this embodiment party
The effect in the bubbler portion 5 of formula is illustrated.
The air that scrollwork terminates portion E is reached via vortex shape stream 12, is first introduced into expanding the upper side wall of stream 19
In 21 inclination start region.Now, the flow velocity towards the air of 21 side of upper side wall flowing is reduced.Thereby, suppress because with it is upper
Collision of side wall 21 etc. and the pressure loss that causes.On the other hand, the inclination beginning of lower wall 22 is positioned at than upper side wall 21
The position in the downstream of air flow is leaned on more, therefore, suppress stagnant areas are produced at lower wall 22.Additionally, when air stream is arrived
During the wall 21,22 inclined region of the both sides up and down for expanding stream 19, the kinetic energy of above-mentioned air flow can be effectively converted to
Pressure energy is improving static pressure, higher so as to send static pressure towards thermostat unit 102 from the blow-off outlet 20 of centrifugal blower 1
Air.
Then, with reference to Fig. 3, the schematic construction and action of the air conditioner for motor vehicle 100 of present embodiment are illustrated.
Above-mentioned air conditioner for motor vehicle 100 is configured to include：The blowing unit 101 being made up of centrifugal blower 1；And temperature
Adjustment unit 102, the thermostat unit 102 is using heat exchanger (not shown) to from blowing unit 101 (centrifugal blower 1)
The temperature of air of the air-supply of bubbler portion 5 be adjusted, and be blown out in car room.The behaviour such as the guidance panel in by car room
After making the starting of air conditioner for motor vehicle 100, air conditioner for motor vehicle 100 is driven to centrifugal blower 1, will be via (not shown) interior
The air that extraneous air switches air door and imports from suction inlet 11, improves static pressure in bubbler portion 5, and blows to temperature adjustment
In the housing 102a of unit 102.Now, even if for example in thermostat unit 102 and towards the pipeline between in-car outlet
Be under pressure loss Deng in, also can improve the static pressure of air, until can by it is final, to in-car exit requirement
The air of air quantity is blown to in-car level, by air from blow-off outlet 20 to housing 102a in blow.Additionally, temperature
Adjustment unit 102 is adjusted to the temperature of air in a heat exchanger according to the temperature by settings such as guidance panels, and is sent
Wind is to in-car.
Centrifugal blower 1 according to present embodiment and the air conditioner for motor vehicle 100 including the centrifugal blower 1, due to
Be formed as including that the distribution uniformity element of the velocity flow profile homogenization for making from multiblade centrifugal fan 3 air discharged (makes
18) horn mouth after the length of lead growth of air, and makes the upper side wall 21 in bubbler portion 5 from the lower wall than bubbler portion 5
22 starting position that inclines more starts inclined structure by the upstream side of air flow, accordingly, it is capable to utilize distribution uniformity element
(make air length of lead increase after horn mouth 18) make velocity flow profile homogenization, even as a result, from multiblade from
The flowing of the air that core type fan 3 is discharged is in the direction deflection towards 15 side of upper plate of volute casing 4 (11 side of suction inlet)
In the case of the expansion stream 19 in bubbler portion 5 is reached under state, incline due to making upper side wall 21 expand than lower wall 22 earlier
Tiltedly, accordingly, it is capable to make the flow velocity of air flowed about in upper side wall 21, than the flow velocity of air that flows about in lower wall 22 more
Decline soon, and can efficiently reduce because and the friction of air flow that collides with upper side wall 21 etc. the pressure that causes
Loss.
In addition, for example making upper side wall 21 with in the state of the air-flow of air is partial to towards the direction of upper side wall 21
Start inclined situation at 22 identical position of side wall or at the position than lower wall 22 more by the downstream of air flow
Under, easily stagnant areas are produced near lower wall 22, as a result, the loss that is under pressure, but in the centrifugation of present embodiment
In pressure fan 1, due to making upper side wall 21 start to incline at the position of the inclination starting position upstream side than lower wall 22,
Therefore, the pressure loss can be also efficiently reduced in this.
So, being evenly distributed in the velocity flow profile homogenization including the air for making from multiblade centrifugal fan 3 to discharge
Change in the structure of element (horn mouth 18 after increasing the length of lead of air), even if the flowing of air is towards the side of upper side wall 21
To there is deflection, the pressure loss caused by above-mentioned deflection also can be efficiently reduced in bubbler portion 5, it is thus possible to effectively
Improve air quantity.
Then, the centrifugal blower 1 of second embodiment of the invention is illustrated.
Fig. 5 represents the longitudinal section of the centrifugal blower 1 of second embodiment of the invention.In addition, for first implement
Mode identical key element, marks identical symbol and omits the description, only the part different from first embodiment is illustrated.
In this second embodiment, multiblade centrifugal fan 3 with its external diameter with increasing towards 11 side of suction inlet
Mode be formed as rounding frustum shape.For example, (dotted line represents the blade 8, annular flange of first embodiment as shown in Figure 6
9th, wall 17 and horn mouth are erected 18), the external diameter by 7 side of base plate of multiblade centrifugal fan 3 is formed as and first is implemented
Mode is identical, and the external diameter by 9 side of annular flange of multiblade centrifugal fan 3 is formed as bigger than first embodiment.
Correspondingly, the internal diameter and external diameter of annular flange 9 and horn mouth 18 also increases.
If understanding, in the multiblade centrifugal fan 3 of rounding frustum shape, suction inlet is leaned in increase as in the present embodiment
The external diameter of the multiblade centrifugal fan 3 of 11 sides, then implement with first of the multiblade centrifugal fan 3 using drum
The situation of mode (with reference to Fig. 4) is compared, can make from multiblade centrifugal fan 3 discharge air it is flow velocity, in the axle of rotating shaft 6
Distribution on heart direction more homogenization.It is contemplated that this is as (blade 8 is leaned on suction inlet 11 by 9 side of annular flange
Side) external diameter be formed as bigger than the external diameter of first embodiment, thus blade 8 is carried in the captivation by 11 side of suction inlet
Height, can correspondingly make the reason of the velocity flow profile homogenization of 11 side of suction inlet.
Additionally, understand after PIV visualized experiments are carried out in the same manner as first embodiment, it is centrifugal from above-mentioned multiblade
Air stream in the air that fan is discharged, flowing to the lower plate side of volute casing has compared with the situation of first embodiment
Reduced.It is contemplated that this is due to the multiblade centrifugal fan 3 using rounding frustum shape, make velocity flow profile more uniform
The reason of change.
In the present embodiment, and " make many as described above by " horn mouth 18 after increasing the length of lead of air "
The external diameter of fin centrifugal fan 3 is with structure (that is, the multiblade of rounding frustum shape increased towards 11 side of suction inlet
Centrifugal fan is 3) ", flow velocity, the dividing on the axis direction of rotating shaft 6 of the air discharged are made from multiblade centrifugal fan 3
Cloth more homogenization.In addition, in the present embodiment, in addition to " horn mouth 18 after increasing the length of lead of air ",
Above-mentioned " the multiblade centrifugal fan 3 of rounding frustum shape " also corresponds to " the distribution uniformity element " of the present invention.
In addition, in the multiblade centrifugal fan 3 for making rounding frustum shape as in the present embodiment by suction inlet 11
In the case that the external diameter of side increases, although there is no the extreme deflection of existing flow direction as shown in Figure 8, but as schemed
Shown in 6, there is the situation that the flow direction of air is slightly offset towards 15 side of upper plate.
Then, situation about be slightly offset towards 15 side of upper plate for the flow direction of air as shown in Figure 6, to this embodiment party
The effect in the bubbler portion 5 of formula is illustrated.
According to the centrifugal blower 1 of present embodiment, compared with the centrifugal blower 1 of first embodiment, can make from many
Flow velocity distribution on the axis direction of the rotating shaft 6 more homogenization of the air that fin centrifugal fan 3 is discharged.In addition,
Make including " horn mouth 18 after increasing the length of lead of air " and " the multiblade centrifugal fan 3 of rounding frustum shape "
To make from multiblade centrifugal fan 3 in the structure of the distribution uniformity element of the velocity flow profile homogenization of the air discharged, with
First embodiment similarly, even if the flowing of air occurs deflection towards the direction of upper side wall 21, also can have in bubbler portion 5
Reduce the pressure loss caused because of above-mentioned deflection in effect ground, it is thus possible to effectively improve air quantity.
Then, the centrifugal blower 1 of third embodiment of the invention is illustrated.
Fig. 7 represents the axonometric chart of the centrifugal blower 1 of third embodiment of the invention.In addition, for the second embodiment party
Formula identical key element, marks identical symbol and omits the description, only the part different from second embodiment is illustrated.
In the present embodiment, volute casing 4 is the stream so that vortex shape stream 12 on the axis direction of rotating shaft 6
The mode that height expands with the downstream towards air flow is formed obliquely the structure of upper plate 15.Additionally, will diffusion
The angle of inclination of the upper side wall 21 in device portion 5 is formed as bigger than the angle of inclination of upper plate 15.Thereby, volute casing 4 itself can be made
Play a part of bubbler, and can more efficiently suppress the pressure loss, compared with the centrifugal blower 1 of second embodiment,
Air quantity can more efficiently be improved.In addition, in the centrifugal blower 1 of first embodiment, it is also possible to using this embodiment party
The volute casing 4 of formula.In this case, compared with the centrifugal blower 1 of first embodiment, also more efficiently can improve
Air quantity.
In addition, as make from multiblade centrifugal fan 3 discharge air it is flow velocity, in the axle center side of rotating shaft 6
The structure (distribution uniformity element) of distribution uniformity upwards, in the above-described first embodiment, application is " in suction inlet 11
What periphery was formed with that the axis direction towards rotating shaft 6 erects erects wall 17, and makes to erect the face by 11 side of suction inlet of wall 17
The structure (horn mouth 18 after increasing the length of lead of air) bent in bell mouth shape ", in second embodiment and the
In three embodiments, except application should be in addition to " horn mouth 18 after increasing the length of lead of air ", also using " making multiblade
(multiblade of rounding frustum shape is centrifugal with the structure increased towards 11 side of suction inlet for the external diameter of centrifugal fan 3
Fan is 3) ", but " distribution uniformity element " be not limited to this, or be configured to only including rounding frustum shape multiblade
The situation of centrifugal fan 3.As long as distribution uniformity element is including for example " being formed with towards rotating shaft 6 in the periphery of suction inlet 11
What axis direction was erected erects wall 17, and makes to erect the knot that the face by 11 side of suction inlet of wall 17 is bent in bell mouth shape
In structure " and " making the external diameter of multiblade centrifugal fan 3 with the structure increased towards 11 side of suction inlet " at least one
The structure of side.
In addition, in the respective embodiments described above, the starting position that inclines of upper side wall 21 is tied including scrollwork for volute casing 4
The end of beam portion E sides is terminated near portion's side end in interior scrollwork, but the present invention is not limited to this, as long as positioned at than lower wall
The position of the upstream side of air flow is more leaned in 22 inclination starting position, then can be optional position.In addition, lower wall 22 is inclined
Tiltedly starting position is that including near the tongue including upper side wall 21, corresponding with tongue 14 position, but the present invention does not limit to
In this, as long as the position in the downstream of air flow is more leaned on positioned at the inclination starting position than upper side wall 21, then can be any
Position.
In addition, in the respective embodiments described above, electro-motor 2 enters as the situation of driving source to be included to centrifugal blower 1
Explanation is gone, but centrifugal blower 1 can not also include electro-motor 2.
In addition, for the centrifugation of the variation of above-mentioned second embodiment, the 3rd embodiment and these embodiments is sent
Blower fan 1, it is also possible to the blowing unit 101 as air conditioner for motor vehicle 100.In addition, centrifugal blower 1 is not limited to car air-conditioner
The blowing unit 101 of device 100, can serve as the blowing unit of appropriate device for needing to be blown.
More than, reference is preferred embodiment illustrated to present disclosure, but for art technology
For personnel, based on the design of the basic fundamental of the present invention and can instruct, further using various deformation forms, this point is certainly
Needless to say say.
Claims (7)
1. a kind of centrifugal blower, including：
Multiblade centrifugal fan, the multiblade centrifugal fan have be configured in turn an axial multiple blades, the multiple wing
Piece centrifugal fan draws air into from the axis direction of the rotating shaft and discharges to radial outside；
Volute casing, the volute casing are received to the multiblade centrifugal fan, and with the air sucked
The vortex shape stream of suction inlet and the stream as the air discharged from the multiblade centrifugal fan；And
Bubbler portion, the bubbler portion have expansion stream and blow-off outlet, wherein, the expansion stream is and the vortex shape stream
The stream of the downstream connection of the air flow on road, and so that the sectional area of the stream is with towards the downstream of air flow
Side and the path heights of the mode that expands to make the axis direction of the rotating shaft change, the blow-off outlet is in the stream that expands
The downstream-end opening of air flow,
Characterized in that,
The centrifugal blower have make from the multiblade centrifugal fan discharge air it is flow velocity, in the rotating shaft
The distribution uniformity element of the distribution uniformity on axis direction,
The bubbler portion is the upper side wall and the lower wall relative with the upper side wall for making the suction inlet side with towards air
The downstream of flowing and the inclined structure in direction separate towards each other,
The starting position that inclines of the upper side wall is arranged on and inclines starting position more by air flow than the lower wall
The position of upstream side.
2. centrifugal blower as claimed in claim 1, it is characterised in that
The distribution uniformity element is configured to include following structure：It is formed with towards the rotating shaft in the periphery of the suction inlet
What axis direction was erected erect wall, and make this erect the face by the suction inlet side of wall to bend in bell mouth shape.
3. centrifugal blower as claimed in claim 1, it is characterised in that
The distribution uniformity element is configured to include following structure：The external diameter of the multiblade centrifugal fan is made with direction
The suction inlet side and increase.
4. centrifugal blower as claimed in claim 1, it is characterised in that
The upper side wall incline starting position be located at the volute casing, terminate including scrollwork including the end of portion side
Scrollwork terminates near portion's side end.
5. centrifugal blower as claimed in claim 4, it is characterised in that
The volute casing is formed as the structure with tongue, and the tongue suppresses air to terminate from the scrollwork of the vortex shape stream
Portion is flowed into scrollwork initial part,
The lower wall incline starting position be located at the lower wall, including the tongue including the position corresponding with tongue
Near.
6. centrifugal blower as claimed in claim 1, it is characterised in that
The volute casing is so that the path heights of the vortex shape stream on the axis direction of the rotating shaft are with court
The mode expanded to the downstream of air flow is tilted with the structure of the wall by the suction inlet side,
The angle of inclination of the upper side wall in the bubbler portion is than the wall by the suction inlet side of the volute casing
Angle of inclination is big.
7. a kind of air conditioner for motor vehicle, it is characterised in that include：
Centrifugal blower described in claim 1；And
Thermostat unit, the thermostat unit is using heat exchanger to sending from the bubbler portion of the centrifugal blower
The temperature of the air for going out is adjusted, and is blown out in car room.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-157357 | 2013-07-30 | ||
| JP2013157357A JP6143596B2 (en) | 2013-07-30 | 2013-07-30 | Centrifugal blower and vehicle air conditioner equipped with the centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104343727A CN104343727A (en) | 2015-02-11 |
| CN104343727B true CN104343727B (en) | 2017-04-12 |
Family
ID=52492116
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410365807.5A Active CN104343727B (en) | 2013-07-30 | 2014-07-29 | Centrifugal air blower and vehicle-mounting air-conditioning apparatus comprising same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6143596B2 (en) |
| CN (1) | CN104343727B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10644363B2 (en) * | 2015-09-14 | 2020-05-05 | Panasonic Intellectual Property Management Co., Ltd. | Temperature conditioning unit, temperature conditioning system, and vehicle |
| JP2017125405A (en) * | 2016-01-11 | 2017-07-20 | 株式会社デンソー | Centrifugal blower |
| CN106427474B (en) * | 2016-11-09 | 2019-07-26 | 珠海格力电器股份有限公司 | Car and its on-board air conditioner |
| KR102536611B1 (en) * | 2017-05-22 | 2023-05-25 | 한온시스템 주식회사 | Blower unit of two layer type air conditioner for vehicle |
| JP6997615B2 (en) * | 2017-06-12 | 2022-01-17 | サンデン・オートモーティブクライメイトシステム株式会社 | Blower |
| WO2019082392A1 (en) * | 2017-10-27 | 2019-05-02 | 三菱電機株式会社 | Centrifugal blower, air blower device, air conditioning device, and refrigeration cycle device |
| CN108528172A (en) * | 2018-06-15 | 2018-09-14 | 重庆松芝汽车空调有限公司 | A kind of air blower arrangement of automobile air conditioning box |
| CN108869407A (en) * | 2018-06-20 | 2018-11-23 | 广东美的白色家电技术创新中心有限公司 | A kind of air exhaust muffler device and household appliance |
| JP6973417B2 (en) * | 2019-01-07 | 2021-11-24 | 株式会社デンソー | Centrifugal blower |
| CN113906221A (en) * | 2019-06-13 | 2022-01-07 | 三菱电机株式会社 | Centrifugal blower, air conditioner, and refrigeration cycle device |
| KR102363396B1 (en) * | 2019-10-16 | 2022-02-15 | 주식회사 케이티앤지 | Aerosol generating device including extractor |
| JP7255448B2 (en) * | 2019-10-21 | 2023-04-11 | 株式会社デンソー | Blower |
| CN111536078A (en) * | 2020-05-20 | 2020-08-14 | 西安交通大学 | Spiral volute of centrifugal fan |
| CN113294211B (en) * | 2021-05-20 | 2024-05-31 | 中齐能源科技有限公司 | Micro-pressure air energy recovery device |
| CN113550930A (en) * | 2021-08-04 | 2021-10-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Centrifugal fan blade, fan and air conditioning system comprising same |
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| US5352089A (en) * | 1992-02-19 | 1994-10-04 | Nippondenso Co., Ltd. | Multi-blades fan device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2015028299A (en) | 2015-02-12 |
| JP6143596B2 (en) | 2017-06-07 |
| CN104343727A (en) | 2015-02-11 |
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