CN104603465A - Cross-flow fan - Google Patents
Cross-flow fan Download PDFInfo
- Publication number
- CN104603465A CN104603465A CN201380045940.6A CN201380045940A CN104603465A CN 104603465 A CN104603465 A CN 104603465A CN 201380045940 A CN201380045940 A CN 201380045940A CN 104603465 A CN104603465 A CN 104603465A
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- CN
- China
- Prior art keywords
- auxiliary ring
- blade
- cross flow
- flow fan
- dunnage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
- F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
- F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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
- F04D29/662—Balancing of rotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A cross-flow fan is configured so that the strength of the cross-flow fan is increased while an increase in flow pass loss caused by the reinforcement member, such as a support plate, of the cross-flow fan is minimized. Blades (40) extend in the longitudinal direction from a support plate (50). An auxiliary ring (60) is located at the intermediate portions of the blades (40) in the longitudinal direction and is joined to the outer ends (40a) of the blades (40). The auxiliary ring (60) is located at a position away from support plate-side blade base sections (40c) of the blades (40) by a distance of 55% or more of the distance from the base sections (40c) of the blades (40) to the tip sections (40d) thereof.
Description
Technical field
The present invention relates to cross flow fan, especially there is the cross flow fan of resinous blade.
Background technique
The cross flow fan that the indoor set of air conditioner etc. use, between two the discoid or circular dunnages at two ends being configured at length direction, is configured with the more blades extended along its length.Further, as recorded in patent documentation 1 (Japanese Unexamined Patent Publication 05-87086 publication) etc., between two dunnages, discoid or circular intermediate plate is configured with, to strengthen the intensity of more blades.
Brief summary of the invention
The problem that invention will solve
In addition, in patent documentation 1, describing following technology: when arranging multiple dunnage, producing wind loss due to multiple dunnage, cause stream loss to increase.But, if reduce the number of dunnage in order to the stream reducing to be caused by dunnage loses, then cause the intensity of cross flow fan to decline.
Summary of the invention
Problem of the present invention is the increase of the stream loss suppressing to produce at the stiffening element of the cross flow fans such as dunnage, and carries out the reinforcement of the intensity of cross flow fan.
For the means of dealing with problems
The cross flow fan of a first aspect of the present invention has: discoid or circular dunnage; More blades, they extend along its length from dunnage; And auxiliary ring, it is positioned at the intermediate portion of the length direction of more blades, is combined with the outer end of more blades, and the distance of the blade base of the dunnage side from auxiliary ring to blade is, more than 55% of the size from blade base to terminal part.
According to the cross flow fan of first aspect, distance from auxiliary ring to blade base is, more than 55% of size from blade base to terminal part, thus the intensity of cross flow fan improves, auxiliary ring is combined with the outer end of more blades in addition, thus supported compared with the dunnage from outer end to the inner with the past, stream can be suppressed to lose.
The cross flow fan of a second aspect of the present invention is the cross flow fan according to first aspect, auxiliary ring and more blades one-body molded.
According to the cross flow fan of second aspect, by by auxiliary ring and more blades one-body molded, do not need the assembling of auxiliary ring and more blades, eliminate the operation etc. be connected with the outer end of more blades by auxiliary ring.
The cross flow fan of a third aspect of the present invention is the cross flow fan according to second aspect, dunnage comprises multiple dunnage, auxiliary ring comprises multiple auxiliary ring, be formed with multiple fan unit, described fan unit is by one-body molded to a dunnage, an auxiliary ring and more blades and obtain, and at least one fan unit is fastened with the more blades of other fan unit on the supporting plate.
According to the cross flow fan of the third aspect, with auxiliary ring, more blades is combined, this auxiliary ring have left the distance of more than 55% of size from blade base to terminal part from blade base, thus easy by the dunnage of a fan unit and the more blades of other fan unit fastening.Further, easily carry out the fastening of blade by auxiliary ring, thus can extend the blade of each fan unit respectively.
The cross flow fan of a fourth aspect of the present invention is according to the cross flow fan in first ~ third aspect described in any one aspect, and the thickness of auxiliary ring is along with thinning from inner circumferential side towards outer circumferential side.
According to the cross flow fan of fourth aspect, thickness, along with thinning towards outer circumferential side, thus can reduce the fluid loss of air at auxiliary ring.
The cross flow fan of a fifth aspect of the present invention is the cross flow fan according to fourth aspect, in auxiliary ring, the inclination from outer circumferential side towards inner circumferential side of the first surface of the terminal part side of blade is greater than the inclination from outer circumferential side towards inner circumferential side of the second surface of dunnage side.
According to the cross flow fan of the 5th aspect, the inclination from outer circumferential side towards inner circumferential side of the first surface of the terminal part side of blade is greater than the inclination from outer circumferential side towards inner circumferential side of the second surface of dunnage side, thus easily one-body molded.
The cross flow fan of a sixth aspect of the present invention is according to the cross flow fan in the first ~ five aspect described in any one aspect, more blades configures in the mode of the position making outer end and be positioned in concentric circles, and auxiliary ring has the circular shape that periphery is passed through in the outside of the outer end of more blades.
According to the cross flow fan of the 6th aspect, the periphery of auxiliary ring is passed through in the outside of the outer end of blade, and thus the periphery of auxiliary ring is not separated by the outer end of blade and connects continuously, so can improve the intensity of auxiliary ring.
The cross flow fan of a seventh aspect of the present invention is that auxiliary ring has circular shape according to the cross flow fan in the first ~ six aspect described in any one aspect, and has identical with the external diameter of dunnage or larger than the external diameter of supporting plate external diameter.
According to the cross flow fan of the 7th aspect, the external diameter of auxiliary ring is identical with the external diameter of dunnage or larger than it, thus can increase the interval of the periphery of auxiliary ring and the outer end of blade, improves the intensity of auxiliary ring.
The cross flow fan of a eighth aspect of the present invention is that auxiliary ring has: main part according to the cross flow fan in the first ~ seven aspect described in any one aspect, and it has circular shape; With balance portion, itself and main part are one-body molded, and partly increase the weight of auxiliary ring, to obtain the balance of rotation.
According to the cross flow fan of eighth aspect, the balance portion of cross flow fan is integrated with the main part of auxiliary ring, thus saves the assembly work about balance portion.
The cross flow fan of a ninth aspect of the present invention is the cross flow fan according to eighth aspect, and auxiliary ring is the protuberance of inner circumferential side balance portion being located at main part.
According to the cross flow fan of the 9th aspect, the balance portion of cross flow fan is located at the inner circumferential side of main part, thus can suppress the decline of the wind pushing performance of the cross flow fan caused owing to arranging balance portion.
The cross flow fan of a tenth aspect of the present invention is the cross flow fan according to eighth aspect, and auxiliary ring is the protuberance of thickness direction balance portion being located at main part.
According to the cross flow fan of the tenth aspect, the balance portion of cross flow fan is located at the thickness direction of main part, thus can arrange the balance portion that can not increase resistance of air, can suppress the decline of the wind pushing performance of the cross flow fan caused owing to arranging balance portion.
Invention effect
In the cross flow fan of a first aspect of the present invention, auxiliary ring can be utilized to suppress the increase of stream loss, and realize the reinforcement of the intensity of cross flow fan.
In the cross flow fan of a second aspect of the present invention, do not need the assembling of auxiliary ring and more blades, can cutting down cost.
In the cross flow fan of a third aspect of the present invention, fan unit quantity can be cut down, realize the reduction of manufacture cost.
In the cross flow fan of a fourth aspect of the present invention, the fluid loss of air can be reduced, improve Diffusion performance.
In the cross flow fan of a fifth aspect of the present invention, due to easily one-body molded, yield rate improves, and can provide cheap cross flow fan.
In the cross flow fan of a sixth aspect of the present invention, the intensity of auxiliary ring can be improved, the effect that the intensity improving cross flow fan is strengthened.
In the cross flow fan of a seventh aspect of the present invention, the intensity of auxiliary ring can be improved, the effect that the intensity improving cross flow fan is strengthened.
In the cross flow fan of a eighth aspect of the present invention, the cross flow fan utilizing balance portion to inhibit the swing of rotation can be provided at low cost.
In the cross flow fan of a ninth aspect of the present invention, the decline of the wind pushing performance caused because of balance portion can be suppressed, reduce the swing rotated.
In the cross flow fan of a tenth aspect of the present invention, the decline of the wind pushing performance caused because of balance portion can be suppressed, reduce the swing rotated.
Accompanying drawing explanation
Fig. 1 is the sectional view of the summary of the indoor set that aircondition is shown.
Fig. 2 is the stereogram of the summary of the impeller of the cross flow fan that a mode of execution is shown.
Fig. 3 is the stereogram of an operation of the assembling of impeller for illustration of cross flow fan.
Fig. 4 is the planimetric map of an example of the structure of the end plate that impeller is shown.
Fig. 5 is the stereogram of an example of the structure of the fan unit that impeller is shown.
Fig. 6 is the side view of an example of the structure of the fan unit that impeller is shown.
Fig. 7 is the planimetric map of an example of the structure of the dunnage that fan unit is shown.
Fig. 8 is the sectional view of an example of the structure of the auxiliary ring that fan unit is shown.
Fig. 9 is the close-up plan view of the structure for illustration of the fan unit shown in Fig. 5.
Figure 10 is the Partial enlarged side view of the structure for illustration of the fan unit shown in Fig. 6.
Figure 11 is the stereogram that the structure of carrying out other fan unit contrasted with the fan unit of Fig. 5 is shown.
Figure 12 is the close-up plan view of the variation of structure for illustration of fan unit.
Figure 13 is the Partial enlarged side view of the variation of structure for illustration of fan unit.
Embodiment
Below, about the cross flow fan of one embodiment of the present invention, be described for the cross flow fan arranged in the indoor set of aircondition.
(1) cross flow fan in indoor set
Fig. 1 is the figure of the overview in the cross section of the indoor set 1 that aircondition is shown.Indoor set 1 has main body cover 2, air filter 3, indoor heat converter 4, cross flow fan 10, vertical baffle 5 and horizontal baffle 6.As shown in Figure 1, in the downstream side of the suction port 2a of the end face of main body cover 2, be configured with air filter 3 opposedly with suction port 2a.Indoor heat converter 4 is configured with in the further downstream side of air filter 3.All passed through at air filter 3 by the indoor air of suction port 2a arrival indoor heat converter 4 and be removed dust.
Front face side heat exchanger 4a and back side heat exchanger 4b are connected in the mode of observing from the side in the shape of falling V and are formed by indoor heat converter 4.When the top view observed from the end face of main body cover 2, front face side heat exchanger 4a is configured in the position opposed with the roughly front face side half of suction port 2a, and back side heat exchanger 4b is configured in the position opposed with the roughly back side half of suction port 2a.Front face side heat exchanger 4a and back side heat exchanger 4b all by by multiple plate fin along the width direction of indoor set 1 arranged in parallel be installed on heat conductive tube and form.Suck from suction port 2a and pass through the indoor air of air filter 3, through front face side heat exchanger 4a and back side heat exchanger 4b time produce heat exchange, carry out air adjustment and.
In the downstream side of indoor heat converter 4, the cross flow fan 10 of substantially cylindrical shape extends in long way along the width direction of main body cover 2, arranges abreast together with indoor heat converter 4 with the width direction of main body cover 2.Cross flow fan 10 has: impeller 20, and it is configured in and is clipped by the indoor heat converter 4 of the shape of falling V and in the space be surrounded by it; With fan motor (not shown), it is for drives impeller 20.This cross flow fan 10 make arrow from impeller 20 to Fig. 1 shown in direction A1 (clockwise) rotate and produce air-flow.
The blowout passage be connected with the blow-off outlet 2b in the downstream of cross flow fan 10 forms back side by scroll element 2c.Scroll element 2c observes from front has the width roughly the same with the opening portion of the blow-off outlet 2b of main body cover 2.The upper end of scroll element 2c is positioned at the position more top than the upper end of cross flow fan 10, observes the position of the central shaft deflection back side be positioned at than the cross flow fan 10 of cylindrical shape from the side.The lower end of scroll element 2c is connected with the opening end of blow-off outlet 2b.The guide surface of scroll element 2c from cross-section in the level and smooth curve shape in cross flow fan 10 side with centre of curvature so that by the air blown out from cross flow fan 10 smoothly and be directed to blow-off outlet 2b imperturbably.
(2) general structure of the impeller of cross flow fan
Fig. 2 shows the general structure of the impeller 20 of cross flow fan 10.End plate 21 and 4 fan units 30 such as engage and form by impeller 20.End plate 21 is configured in one end of impeller 20, and a fan unit in 4 fan units 30 is configured in the other end.End plate 21 has metal running shaft 22 on the O of axle center.Further, in the fan unit 30 of the other end being configured at impeller 20, the hub portion (not shown) be connected with fan motor axis (not shown) is located at the central part of this fan unit 30 usually.Or, also there is the situation that the fan unit 30 being configured at the other end of impeller 20 has other structure, as fan unit 30 is configured to have the parts be combined with a part for fan motor, and at central part, there is metal shaft etc.The hub portion (or metal shaft) of the fan unit 30 of the running shaft 22 of end plate 21 and the other end of impeller 20 is support, and impeller 20 rotates around axle center O.This end plate 21 adopts and end plate identical in the past.But the structure of end plate 21 does not need identical with the past, suitably can change the structure of end plate 21, to be suitable for the present invention.
Each fan unit 30 has more blades 40, circular dunnage 50 and auxiliary ring 60 respectively.When assembling impeller 20, the more blades 40 of each fan unit 30 self is fused in the dunnage 50 or end plate 21 of adjacent fan unit 30.Fig. 3 shows the operation that two mutually adjacent fan units 30 are fused.Two fan units 30 overlap on fixture 103.The fan unit 30 of this overlap is clamped by fixture 103 and soldering tip (horn) 102.Supply ultrasound from oscillator 101 to soldering tip 102, the ultrasound supplied is propagated and is supplied to fan unit 30 in soldering tip 102.Thus, the blade 40 of a fan unit 30 and dunnage 50 welding by ultrasound of another fan unit 30.Equally, fan unit 30 and end plate 21 are clipped between another fixture and soldering tip 102, supply ultrasound from oscillator 101 to soldering tip 102, thus by the blade 40 of fan unit 30 and end plate 21 welding.When such welding, be formed with at end plate 21 recess 23 that quantity is identical with blade 40 as shown in Figure 4, blade 40 is positioned end plate 21.Each recess 23 has the plane shape slightly larger than the sectional shape of each blade 40, and thus each blade 40 to embed respectively in each recess 23 and is embedded in this.A recess 23 only in multiple recess 23 is formed with end difference 23a, to carry out the location of end plate 21 and fan unit 30.
(3) concrete structure of fan unit
The concrete structure of the fan unit 30 of present embodiment is as shown in Fig. 5 ~ Figure 10.Fig. 5 is the stereogram of the fan unit 30 illustrated in multiple fan units 30 of the impeller 20 shown in pie graph 2, and Fig. 6 is the side view of this fan unit 30.Fan unit 30 shown in Fig. 5 and Fig. 6 is consisted of the integrated more blades 40 such as molding and forming and dunnage 50 and auxiliary ring 60 by taking thermoplastic resin as main material.The sense of rotation of fan unit 30 is direction A1 shown in arrow of Fig. 5.
(3-1) blade
More blades 40 is from first surface 50a (direction along axle center O) extension along its length of circular dunnage 50.Blade 40 is by one-body molded with dunnage 50, thus blade base 40c is fixed on the first surface 50a of dunnage 50, and the opposition side of the blade base 40c of the length direction of blade 40 becomes blade end portion 40d.The length L1 (from blade base 40c to the size of blade end portion 40d) of blade 40 is such as about 10cm.Blade 40 has suction surface 40f and pressure side 40e.Arrow from fan unit 30 to Fig. 5 shown in direction A1 rotate time, the pressure of the pressure side 40e side of blade 40 raises, and the pressure of suction surface 40f side reduces.
The blade end portion 40d of a slice blade 40 only in more blades 40 is formed with notch 40i.This notch 40i is the part of location for carrying out two fan units 30 or carries out the part of location of fan unit 30 and end plate 21, is the part chimeric with the end difference 51c of the end difference 23a of the recess 23 of above-mentioned end plate 21 or the recess 51 of fan unit described later 30.By arranging notch 40i, each recess 51 of each recess 23 of each blade 40 and end plate 21 or fan unit 30 can be made so corresponding one to one.When positioning like this, more blades 40 can be made according to often group is corresponding with multiple splitting dies of mould during molding and forming, blade 40 can be configured in easy mode of taking out from splitting die.Specifically, with symmetrically configure the mode of more blades 40 relative to axle center O compared with, the inclination of blade 40 and the shape of rotation asymmetry of taking out are changed in the direction being configured to by more blades 40 easily depart from splitting die at blade 40.
(3-2) dunnage
Fig. 7 represents the state of observing circular dunnage 50 from bottom surface, namely carries out the state of observing from second surface 50b side.The recess 51 embedded for blade 40 is formed at the second surface 50b opposed with first surface 50a of dunnage 50.Each recess 51 has the plane shape slightly larger than the sectional shape of each blade 40, and thus when two fan units 30 are overlapping, each blade 40 to embed respectively in each recess 51 and is embedded in this.Inner circumferential along dunnage 50 is formed with the protuberance 52 of the ring-type higher than second surface 50b.The outer circumferential side of protuberance 52 tilts sideling, plays the effect when two fan units 30 are overlapping, blade 40 being guided to recess 51.
The periphery 51a of the recess 51 of the outer end 40a contact of blade 40 is positioned at the inner side of the periphery 50c of dunnage 50, and the inner circumferential 51b of the recess 51 of the inner 40b contact of blade 40 is positioned at the outside of the inner circumferential 50d of dunnage 50.In other words, the distance d1 (distance to the outer end 40a of blade 40) from the center (point the O of axle center) of dunnage 50 to the periphery 51a of recess 51 is less than the radius r 1 from the center of dunnage 50 to periphery 50c.Further, the distance d2 (distance to the inner 40b of blade 40) from the center (point the O of axle center) of dunnage 50 to the inner 51b of recess 51 is larger than the radius r 2 from the center of dunnage 50 to inner circumferential 50d.This dunnage 50 is set to and makes the width W 1 (radius r 1-radius r 2) of dunnage 50 be greater than distance (distance d1-distance d2) from the outer end 40a of blade 40 to the radial direction of inner 40b, to make the intensity that the intensity of support blade 40 keeps higher.
(3-3) auxiliary ring
Auxiliary ring 60 is positioned at the intermediate portion of the length direction of blade 40, and auxiliary ring 60 to the distance of blade base 40c is, 60% of the size (the length L1 of blade 40) from blade base 40c to blade end portion 40d.The allocation position of auxiliary ring 60 preferably leaves the distance of more than 55% of length L1 from blade base 40c, to improve the intensity of cross flow fan 20, easily carry out the assembly processes such as ultrasonic welding.
Fig. 8 shows the sectional shape of the anastomosis part of auxiliary ring 60 and blade 40.Cross section shown in Fig. 8 is the cross section presented when the face vertical with axle center O cuts off.In fig .9, the auxiliary ring 60 when observing from the blade end portion 40d of blade 40 towards blade base 40c and blade 40 and dunnage 50 partial enlargement are illustrated.Auxiliary ring 60 primarily of ring portion 61 and joint 62 be connected assisting section 63 and form.The radius r 3 of the periphery 61a of ring portion 61 is greater than the radius r 1 of the periphery 51a of dunnage 50.Further, the radius r 3 of the periphery 61a of ring portion 61 is greater than the distance d1 from the center (point the O of axle center) of auxiliary ring 60 to the outer end 40a of blade 40.That is, the periphery 61a of ring portion 61 passes through in the outside of the outer end 40a of all blades 40.In this auxiliary ring 60, the radius r 4 of the inner circumferential 61b of ring portion 61 is greater than the radius r 2 of the inner circumferential 51b of dunnage 50, and less times greater than the distance d1 of outer end 40a to blade 40, the inner circumferential 61b of ring portion 61 passes through near the outside of the outer end 40a of blade 40.
Joint 62 is observed from the direction of axle center O and is formed as the triangle outstanding from ring portion 61 towards inner side.The joint 62 of shape triangular in shape has 3 tops 62a, 62b, 62c, and the limit between top 62a, 62b is connected with ring portion 61, and the limit between top 62a, 62c is connected with the suction surface 40f of blade 40.On the other hand, the pressure side 40e of blade 40 is not connected with joint 62.The length L4 (length from top 62a to top 62c) of the part that joint 62 is connected with suction surface 40f is shorter than 1/2nd of chord of foil length L3.By being set to that to make the length L4 of the part be connected with suction surface 40f shorter than 1/2nd of chord of foil length L3, and be set to that compared with the situations longer than 1/2nd of chord of foil length L3, Diffusion performance improves.
Be formed near the outer end 40a of blade 40 and connect assisting section 63.Connecting assisting section 63 is the outer end 40a of landfill blade 40 and the part between joint 62 and ring portion 61, for the connection of this three auxiliary.
Enlargedly show a part for the auxiliary ring 60 observed from the side in Fig. 10.Auxiliary ring 60 has the first surface 60a of 40d side, blade end portion, second surface 60b, the outer circumferential face 60c of blade base 40c side and inner peripheral surface 60d.Be formed with the curved surface 60e of radius of curvature R 1 in the part connecting this first surface 60a and outer circumferential face 60c, be formed with the curved surface 60f of radius of curvature R 2 in the part connecting this second surface 60b and outer circumferential face 60c.
The thickness of auxiliary ring 60 is along with thinning from inner circumferential side towards outer circumferential side.That is, auxiliary ring 60 is less than thickness t1 near blade base 40c at the thickness t2 of outer circumferential face 60c.More carefully observe, be set to by auxiliary ring 60, the tiltangleθ 1 making first surface 60a crossing with the face vertical relative to axle center O is greater than the tiltangleθ 2 that the second surface 60b face vertical with this is intersected.In addition, the thickness t1 of auxiliary ring 60 is set to the thickness t3 being less than dunnage 50.
(4) variation
(4-1) in the above-described embodiment, the joint 62 top view shape triangular in shape of auxiliary ring 60, but the plane shape of joint 62 is not limited to triangle also can be such as other shape such as semicircle or trapezoidal.
(4-2) in the above-described embodiment, the radius r 3 describing the periphery 61a of ring portion 61 is greater than the situation of the radius r 1 of the periphery 51a of dunnage 50, but also the radius r 3 of the periphery 61a of ring portion 61 can be set to identical with the radius r 1 of the periphery 51a of dunnage 50.
(4-3) auxiliary ring 60 as shown in Figure 8 in the above-described embodiment, is described by the ring portion 61 with circular shape and joint 62 and the situation being connected assisting section 63 and forming.But auxiliary ring also can have structure in addition.Such as, balance portion can also be added at auxiliary ring 60 (main part).This balance portion is integrated with auxiliary ring 60 (main part), for partly increasing the weight of auxiliary ring 60, to obtain the balance of the rotation of fan unit 30.Ring portion 61 and multiple joint 62 be connected assisting section 63 and be configured to Rotational Symmetry centered by the O of axle center, and balance portion does not symmetrically configure.
The balance portion of cross flow fan 10 is integrated with the main part of auxiliary ring (ring portion 61 and joint 62 and be connected assisting section 63), eliminates the assembly work relevant to balance portion.Therefore, it is possible to provide the cross flow fan 10 utilizing balance portion to suppress the swing rotated at low cost.
The balance portion of fan unit 30 is integrated with the main part of auxiliary ring (ring portion 61 and joint 62 and be connected assisting section 63), eliminates the assembly work relevant to balance portion.Further, by arranging balance portion at the auxiliary ring 60 being positioned at outer diameter part, balance portion amount of resin can be cut down, realizing cost and reducing.Past arranges balance portion in circular dunnage or its inner circumferential side, to revise the imbalance due to the fan unit caused with unequal-interval configuration blade, but if at the auxiliary ring 60 being positioned at more outside diameter, balance portion is set, then can cut down amount of resin, realize cost reduce.Further, not the balance utilizing the dunnage 50 of blade base 40c to revise the blade 40 of unequal-interval configuration, but utilize the auxiliary ring 60 of the substantially central portion of blade 40 to revise imbalance, more effective like this.Therefore, it is possible to provide the cross flow fan 10 utilizing balance portion to suppress the swing rotated at low cost.
Balance portion such as can be arranged on the inner circumferential side of the main parts such as the inner peripheral surface 60d of auxiliary ring 60 as shown in figure 12 in protuberance 64 mode.In addition, in fig. 12, by the shape that the part 64a of the substantially linear shown in double dot dash line is when not arranging balance portion.Like this, if arrange balance portion in the inner circumferential side of main part, the decline of the wind pushing performance caused because arranging balance portion can being suppressed, reducing the swing rotated.
Balance portion such as can be arranged on the inner circumferential side of the main parts such as the inner peripheral surface 60d of auxiliary ring 60 as shown in figure 12 in protuberance 64 mode.In addition, in fig. 12, by the shape that the part 64a of the substantially linear shown in double dot dash line is when not arranging balance portion.Like this, if arrange balance portion in the inner circumferential side of main part, the decline of the wind pushing performance caused because arranging balance portion can being suppressed, reducing the swing rotated.
In addition, balance portion also can be the protuberance arranged on the thickness direction of main part.Such as, also as shown in figure 13, can arrange the protuberance 65 of auxiliary ring 60 as balance portion, this protuberance 65 is formed by the thickness of one increased in multiple joint 62 or multiple connection assisting section 63.Or, a part of thickness increasing ring portion 61 and the protuberance 66 of auxiliary ring 60 formed also can be set as balance portion.Because the balance portion of cross flow fan 10 is located on the thickness direction of main part, thus the balance portion that can not increase resistance of air can being set, the decline of the wind pushing performance of the cross flow fan caused because arranging balance portion can being suppressed, reduce the swing rotated.
(5) feature
(5-1) ring portion 61 of auxiliary ring 60 is positioned at the intermediate portion of the length direction of more blades 40, engages with the outer end 40a of more blades 40.Auxiliary ring 60 is combined with the outer end 40a of more blades 40, thus compared with situation about supporting with circular plate-shaped member from the outer end of blade 40 to the inner, stream can be suppressed to lose.Further, in the above-described embodiment, from auxiliary ring 60 to the distance of the blade base 40c of the dunnage side of blade 40 be, from blade base 40c to 60% of the size of blade end portion 40d.Be that, from blade base 40c to more than 55% of the size of blade end portion 40d, thus the intensity of cross flow fan 10 improves, and is described the raising of this intensity from auxiliary ring 60 to the distance of blade base 40c.
Blade 40 is in the shape of gently bending tabular, and thus the easy width direction along blade 40 bends.Easily damage because flexure makes stress concentrate on the anastomosis part of blade base 40c or blade end portion 40d and dunnage 50 or end plate 21, and become vibrative reason.Further, due to flexure make easily to be formed when being carried out the joint of blade 40 and dunnage 50 or end plate 21 by ultrasonic fusing etc. engage bad.With auxiliary ring 60 by more blades 40 harness time, blade 40 is difficult to flexure, thus can solve and as above concentrate the damage that causes and bad and produce the problems such as noise by bending the joint caused by stress.Further, can suppress shaping after blade topple over, make easily to insert in welding groove gap, and fully can guarantee the blade rigid from auxiliary ring to end side, thus workability improves further.Like this, consider engagement blade terminal part 40d, have left from blade base 40c to the distance of more than 55% of the size of blade end portion 40d and also be than the centre of the length direction of blade 40 near the position of blade end portion 40d, auxiliary ring 60 is set.Be in the above-described embodiment have left 60% distance, but after blade 40 intermediate portion harness along its length, be preferably positioned at the distance within such as more than 55% 75%, be more preferably positioned at the distance within more than 60% 65%.
Such as, in order to obtain the unit similar to the fan unit 30 of length L1, also can consider the following structure as shown in figure 11 replacing auxiliary ring 60: with two fan units 130 that dunnage 150 engagement blade 140 is shorter.At this, the structure of dunnage 150 is structures identical with above-mentioned dunnage 50.By two fan units 130 shown in such Figure 11 compared with the fan unit of shown in Fig. 5 30, although intensity when forming impeller is roughly the same, but in structure as shown in figure 11, dunnage 150 is positioned at the centre of fan unit, thus compared with the situation of auxiliary ring 60, not only the stream loss of two fan units 130 increases, and effective blade length shortens.In addition, in structure as shown in figure 11, add the operation for engaging two fan units 130, the cost thus assembling cost also rises.
(5-2) auxiliary ring 60 of above-mentioned cross flow fan 10 and more blades 40 resin are formed, and auxiliary ring 60 is one-body molded with more blades 40 by molding and forming etc.By by one-body molded to auxiliary ring 60 and more blades, no longer need the assembling of auxiliary ring and more blades, can cutting down cost.
(5-3) in addition, dunnage 50 is also formed with resin, forms multiple fan unit 30 by molding and forming etc., and described fan unit 30 is by a dunnage 50 and an auxiliary ring 60 and more blades 40 is one-body molded obtains.And, with auxiliary ring 60, more blades 40 is combined, this auxiliary ring 60 have left the distance from blade base 40c to more than 55% of the size of blade end portion 40d from blade base 40c, and thus the easy dunnage 50 by a fan unit 30 is fastening with the more blades 40 of other fan unit 30.Consequently, the blade 40 of each fan unit 30 can be extended respectively, cut down fan unit quantity, realize the reduction of manufacture cost.
(5-4) thickness of the ring portion 61 of above-mentioned auxiliary ring 60 is along with thinning from inner circumferential side towards outer circumferential side.That is, the thickness t1 of inner circumferential side is greater than the thickness t2 of outer circumferential side.Therefore, it is possible to reduce air at the fluid loss of auxiliary ring 60, Diffusion performance can be improved.Further, the thickness of preferred auxiliary ring 60 is from joint 62 until ring portion 61 is all along with thinning towards outer circumferential side.In this case, Diffusion performance can be improved further.In addition, auxiliary ring 60 is thin at the Thickness Ratio outer circumferential side of inner circumferential side, from mould, thus easily take out the fan unit 30 of cross flow fan 10 when molding and forming.
(5-5) in addition, the inclination from outer circumferential side towards inner circumferential side of the first surface 60a of auxiliary ring 60 in 40d side, blade end portion is greater than the inclination from outer circumferential side towards inner circumferential side of the second surface 60b in dunnage 50 side.The inclination from outer circumferential side towards inner circumferential side of first surface 60a is greater than the inclination from outer circumferential side towards inner circumferential side of the second surface 60b of dunnage 50 side, when thus such as making mould rotate centered by the position near blade end portion 40d and depart from fan unit 30 after moulding, easily take out products formed.The mould of this removing method is adopted such as to have the mold joint being divided into multiple part around axle center O.Like this, easily realize one-body molded, and then yield rate improve, and can reduce the manufacture cost of cross flow fan 10.
(5-6) more blades 40 configures in the mode making outer end 40a and be positioned at the position of the concentric circles centered by the O of axle center.Further, auxiliary ring 60 has the circular shape that outer circumferential face 60c passes through in the outside of the outer end 40a of more blades 40.The outer circumferential face 60c of auxiliary ring 60 passes through in the outside of the outer end 40a of blade 40, and thus the outer circumferential face 60c of auxiliary ring 60 is not separated by outer end 40a and connects continuously.Therefore, it is possible to improve the intensity of auxiliary ring 60, the effect that the intensity improving cross flow fan 10 is strengthened.
(5-7) auxiliary ring 60 has circular shape, and has the external diameter r3 larger than the external diameter r1 of dunnage 50.The external diameter r3 of auxiliary ring 60 is identical or larger than it with the external diameter r1 of dunnage 50, thus can increase the interval of the outer circumferential face 60c of auxiliary ring 60 and the outer end 40a of blade 40, improves the intensity of auxiliary ring 60.Like this, the intensity of auxiliary ring 60 can be improved, the effect that the intensity improving cross flow fan 10 is strengthened.
Label declaration
10 cross flow fans; 20 impellers; 30 fan units; 40 blades; 50 dunnages; 60 auxiliary rings.
[prior art document]
[patent documentation]
Patent documentation 1: Japanese Unexamined Patent Publication 05-87086 publication
Claims (10)
1. a cross flow fan, this cross flow fan has:
Discoid or circular dunnage (50);
More blades (40), they extend along its length from described dunnage; And
Auxiliary ring (60), it is positioned at the intermediate portion of the length direction of blade described in multi-disc, combines with the outer end (40a) of blade described in multi-disc,
The distance of the blade base (40c) of the described dunnage side from described auxiliary ring to described blade is, from described blade base to more than 55% of the size of terminal part (40d).
2. cross flow fan according to claim 1, wherein,
Described in described auxiliary ring and multi-disc, blade is one-body molded.
3. cross flow fan according to claim 2, wherein,
Described dunnage comprises multiple dunnage,
Described auxiliary ring comprises multiple auxiliary ring,
Be formed with multiple fan unit, described fan unit by one-body molded for blade described in a described dunnage, a described auxiliary ring and multi-disc and obtain,
Blade described in the multi-disc that fan unit described at least one is fastened with fan unit described in other in described dunnage.
4. cross flow fan according to claim 1 and 2, wherein,
The thickness of described auxiliary ring is along with thinning from inner circumferential side towards outer circumferential side.
5. cross flow fan according to claim 4, wherein,
In described auxiliary ring, the inclination from outer circumferential side towards inner circumferential side of the first surface (60a) of the described terminal part side of described blade is greater than the inclination from outer circumferential side towards inner circumferential side of the second surface (60b) of described dunnage side.
6. according to the cross flow fan in Claims 1 to 5 described in any one, wherein,
Blade described in multi-disc configures in the mode of the position that outer end is positioned in concentric circles,
The circular shape that the outside that described auxiliary ring has described outer end of blade described in multi-disc, periphery (60c) is passed through.
7. according to the cross flow fan in claim 1 ~ 6 described in any one, wherein,
Described auxiliary ring has circular shape, and has identical with the external diameter of described dunnage (r1) or larger than the external diameter of described supporting plate external diameter (r3).
8. according to the cross flow fan in claim 1 ~ 7 described in any one, wherein,
Described auxiliary ring has: main part, and it has circular shape; With balance portion (64,65), itself and described main part are one-body molded, and partly increase the weight of described auxiliary ring, to obtain the balance of rotation.
9. cross flow fan according to claim 8, wherein,
Described auxiliary ring is the protuberance (64) described balance portion being located at the inner circumferential side of described main part.
10. cross flow fan according to claim 8, wherein,
Described auxiliary ring is the protuberance (65) described balance portion being located at the thickness direction of described main part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-194256 | 2012-09-04 | ||
| JP2012194256A JP5704139B2 (en) | 2012-09-04 | 2012-09-04 | Cross flow fan |
| PCT/JP2013/073142 WO2014038465A1 (en) | 2012-09-04 | 2013-08-29 | Cross-flow fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104603465A true CN104603465A (en) | 2015-05-06 |
| CN104603465B CN104603465B (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380045940.6A Active CN104603465B (en) | 2012-09-04 | 2013-08-29 | Cross flow fan |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2894344B1 (en) |
| JP (1) | JP5704139B2 (en) |
| CN (1) | CN104603465B (en) |
| ES (1) | ES2625978T3 (en) |
| WO (1) | WO2014038465A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108700079A (en) * | 2016-02-26 | 2018-10-23 | 三菱电机株式会社 | The manufacturing method of cross flow fan and cross flow fan |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102240314B1 (en) * | 2015-02-16 | 2021-04-14 | 삼성전자주식회사 | Scroll for air conditioner and Air conditioner having the same |
| CN105289114B (en) * | 2015-12-08 | 2017-07-04 | 江苏揽山环境科技股份有限公司 | Demisting dedusting blade group |
| CN105737265B (en) * | 2016-03-28 | 2019-03-26 | 玉环市荣康达机械厂 | Low noise air-conditioning internal machine |
| US10865798B2 (en) | 2016-05-30 | 2020-12-15 | Zhongshan Broad-Ocean Motor Co., Ltd. | Fan coil unit |
| WO2018054027A1 (en) * | 2016-09-22 | 2018-03-29 | 中山大洋电机股份有限公司 | Coil draught fan structure |
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- 2013-08-29 ES ES13835808.0T patent/ES2625978T3/en active Active
- 2013-08-29 CN CN201380045940.6A patent/CN104603465B/en active Active
- 2013-08-29 EP EP13835808.0A patent/EP2894344B1/en active Active
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| CN108700079B (en) * | 2016-02-26 | 2020-04-17 | 三菱电机株式会社 | Cross flow fan and method for manufacturing cross flow fan |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2894344A4 (en) | 2015-08-12 |
| EP2894344B1 (en) | 2017-03-29 |
| WO2014038465A1 (en) | 2014-03-13 |
| EP2894344A1 (en) | 2015-07-15 |
| CN104603465B (en) | 2016-09-28 |
| JP2014047773A (en) | 2014-03-17 |
| JP5704139B2 (en) | 2015-04-22 |
| ES2625978T3 (en) | 2017-07-21 |
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