CN1115523C - DC blower - Google Patents
DC blower Download PDFInfo
- Publication number
- CN1115523C CN1115523C CN 98118773 CN98118773A CN1115523C CN 1115523 C CN1115523 C CN 1115523C CN 98118773 CN98118773 CN 98118773 CN 98118773 A CN98118773 A CN 98118773A CN 1115523 C CN1115523 C CN 1115523C
- Authority
- CN
- China
- Prior art keywords
- mentioned
- impeller
- blower
- volute casing
- radius
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
-
- 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
Abstract
A cross-flow blower including a cross-flow impeller is described. A stabilizer is provided with an opposed surface which is opposite to the front of a cross-flow impeller and has the beginning point formed by a point of intersection of a circular arc having the center located at the center of rotation of the cross-flow impeller and a diameter being 103% or more of the one of the cross-flow impeller and an extension of the inner surface of the trunk air duct and the end point formed in the direction outside the trunk air duct. Besides, a space between the inflow-side end part of the casing and the outer periphery of the cross-flow impeller is set to be 3% or more of the diameter of the cross-flow impeller, while the inner curved surface of the scroll casing is formed by a circular arc being concentric with the center of the casing and having a radius equaling a space to the inflow-side end part therefrom.
Description
The present invention relates to the DC blower of equipment air-supply usefulness such as air conditioner.
DC blower is used for the air-supply of equipment such as air conditioner in the past, people to its in energy-conservation, as to be used for travelling comfort quietization processing, the aspects such as improved efficiency that are used to improve the steady air current processing of air-supply characteristic improve.But because the checking of the theoretical property of the air-flow of not blowing in the design method of DC blower, the improvement of above-mentioned like this characteristic is by adopting tentative wrong mode to carry out to each device in the equipment such as air conditioner.
As described in the flat 5-296479 document of TOHKEMY, existing DC impeller is provided with the back shell that constitutes rear portion, DC blower top side, and the rear nozzle that is provided with viscous flow portion along the direction identical with the running shaft of DC blower.Can eliminate race conditios such as adverse current by above-mentioned structure, reduce noise, raise the efficiency the improvement of aspect.
In addition, as described in the flat 7-305695 document of TOHKEMY, in relative DC impeller, with the front lower from DC impeller, the perpendicular position of straight line at the center by DC impeller is provided with stabilizer.In addition, carried out the improvement of following aspect, the optimal mode in position according to relative this stabilizer forms volute casing by two circular arcs, suppresses the reduction and the noise of exhaust air rate thus.
In above-mentioned existing DC blower, improvement, reduction noise, stable air-supply air-flow for implementation efficiency, do not change the suction side shape of DC impeller or the shape of exhaust portion, in addition not to controlling by the phenomenon of the air-flow that DC impeller produced itself.Therefore have following problems, promptly can not be to efficient, the improvement of internal is carried out in aspects such as noise properties, because the related device in the equipment such as air conditioner is improved to try wrong mode repeatedly, producibility incurs loss like this.
The present invention proposes in order to overcome the problems referred to above, the objective of the invention is to obtain a kind of DC blower, and this DC blower is improved wind pushing performance according to the phenomenon control by the air-flow itself that DC impeller produced.
DC blower as the 1st technological scheme of the present invention relates to following a kind of DC blower, and it realizes that by DC impeller it comprises to the blowing of air:
Outlet pipe, it leads to the air that above-mentioned DC impeller blowed:
Stabilizer, it is arranged on the above-mentioned outlet pipe according to the mode relative with the front of above-mentioned DC blower;
Volute casing, it is to be arranged at the back of above-mentioned DC impeller with above-mentioned outlet pipe ways of connecting;
The aforementioned stable utensil has following curved surface, and this curved surface is to be formed by near its circular arc that is centered close to the rotating center of above-mentioned DC impeller;
Above-mentioned curved surface be arranged near the following starting point and following terminal point between, this starting point is arranged at the elongation line of above-mentioned outlet pipe and the intersection point place between the above-mentioned circular arc, and above-mentioned terminal point is arranged at the some place at sense of rotation one side of DC impeller and above-mentioned starting point maintenance certain distance;
Spacing between above-mentioned curved surface and the above-mentioned DC impeller is more than 3% of radius of above-mentioned DC impeller;
The center of above-mentioned starting point, above-mentioned terminal point and above-mentioned DC impeller is provided with according to the perpendicular bisector of the straight line that connects above-mentioned starting point and the above-mentioned terminal point mode by above-mentioned center;
Above-mentioned volute casing comprises the negative camber that is formed by the shell circular arc;
Above-mentioned shell circular arc is following circular arc, this center of arc is arranged in the triangle inside that is formed centrally by above-mentioned starting point, above-mentioned terminal point and above-mentioned DC impeller, and the length of imaginary line that connects the end, inflow side of above-mentioned center of arc and above-mentioned volute casing is the radius of this circular arc;
The periphery intersection point that intersects to form between the periphery of above-mentioned imaginary line and above-mentioned DC impeller, and the spacing between the end, inflow side of above-mentioned volute casing is more than 3% of diameter of above-mentioned DC impeller.
DC blower as the 2nd technological scheme of the present invention, the curved surface of aforementioned stable device is to be formed by following circular arc, this center of arc is positioned at the rotating center place of above-mentioned DC impeller, and the radius of this circular arc is more than 103% of diameter of above-mentioned DC impeller.
As the DC blower of the 3rd technological scheme of the present invention, the aforementioned stable device has convex surface near the starting point of above-mentioned curved surface.
As the DC blower of the 4th technological scheme of the present invention, the curved surface of aforementioned stable device is to form along the regulation imaginary circle that is the center of circle with the center of arc of above-mentioned volute casing.
As the DC blower of the 5th technological scheme of the present invention, the aforementioned stable device has convex surface near the starting point of above-mentioned curved surface.
DC blower as the 6th technological scheme of the present invention, radius at the negative camber of above-mentioned volute casing is represented with r, flow velocity at the eddy flow of the internal flow of above-mentioned DC impeller is represented with V θ, the speed index is represented with n, the occasion that the cyclic constant of stream is represented with Γ, according to the mode of speed index n, by following formula in the scope of 0.85≤n≤0.1
Vθ×r
n＝Γ
Determine radius r.
DC blower as the 7th technological scheme of the present invention, the radius r of the negative camber of above-mentioned volute casing, in the course of action of above-mentioned DC impeller, set lessly in the bigger occasion of the pressure loss that the outside produced of DC blower, set greatlyyer in the less occasion of the above-mentioned pressure loss.
DC blower as the 8th technological scheme of the present invention, the radius r of the negative camber of above-mentioned volute casing, the bigger occasion of the suction pressure that device produced loss in the suction side that is arranged at above-mentioned DC impeller is set lessly, sets greatlyyer in the less occasion of above-mentioned suction pressure loss.
DC blower as the 9th technological scheme of the present invention, the radius r of the negative camber of above-mentioned volute casing is determined in the following manner, this mode is: itself and be illustrated in the relation that the no dimension of the fluid loss situation that DC blower inside produced counts between the ξ and represent that by following formula this formula is: r ∝ 1/ ξ.
Fig. 1 is expression the present invention the 1st embodiment's figure, and this figure is vertical side view of section of the indoor set in the air conditioner;
Fig. 2 is used for the enlarged view that the air stream to the DC blower of Fig. 1 describes;
Fig. 3 is used for mode with hypothesis to the air stream figure that describe, suitable with Fig. 2 of Fig. 2;
Fig. 4 is another situation figure that describe, suitable with Fig. 2 that is used for the air stream of Fig. 3;
Fig. 5 is the figure that describe, suitable with Fig. 2 of a situation again that is used for the air stream of Fig. 3;
Fig. 6 is the also situation figure that describe, suitable with Fig. 2 that is used for the air stream of Fig. 3;
Fig. 7 is the another situation figure that describe, suitable with Fig. 2 that is used for the air stream of Fig. 3;
Fig. 8 is another situation figure that describe, suitable with Fig. 2 that is used for the air stream of Fig. 3;
Fig. 9 is the perspective view with the major component of the blade in the DC blower in the mode presentation graphs 1 that amplifies;
Figure 10 is expression the present invention the 2nd embodiment's figure, and this figure is used for the air stream of DC blower is described, and it is equivalent to above-mentioned Fig. 2;
Figure 11 is and the corresponding figure of Figure 10, and this figure is used for another air stream of DC blower is described, and it is equivalent to above-mentioned Fig. 2;
Figure 12 is expression the present invention the 3rd embodiment's figure, and this figure is used for the air stream of DC blower is described, and it is equivalent to above-mentioned Fig. 2;
Figure 13 is expression the present invention the 4th embodiment's figure, and this figure is used for the air stream of DC blower is described with curve;
The figure that Figure 14 describes for the state to the air stream in blowing with the corresponding direct current of Figure 13, this figure is equivalent to Fig. 2;
Figure 15 is expression the present invention the 5th embodiment's figure, and this figure is used for the air stream of DC blower is described, and it is equivalent to above-mentioned Fig. 2;
Figure 16 is vertical side view of section of the indoor set in the air conditioner, and this figure is used for the shape of the volute casing of the DC blower of Figure 15 is described;
Figure 17 is vertical side view of section of the indoor set in the air conditioner, and this figure is used for the another kind of shape of the volute casing of the DC blower of Figure 15 is described;
The 1st embodiment
An example in Fig. 1～9 expression embodiment of the invention, Fig. 1 is vertical profile of the indoor set in the air conditioner, Fig. 2 is used for enlarged view that the air stream in the DC blower of Fig. 1 is described, Fig. 3 describes the air stream among Fig. 2 for the mode with hypothesis, the figure suitable with Fig. 2, Fig. 4 is used for another situation of the air stream of Fig. 3 is described, the figure suitable with Fig. 2, Fig. 5 is used for a situation again of the air stream of Fig. 3 is described, the figure suitable with Fig. 2, Fig. 6 is used for an also situation of the air stream of Fig. 3 is described, the figure suitable with Fig. 2, Fig. 7 is used for the another situation of the air stream of Fig. 3 is described, the figure suitable with Fig. 2, Fig. 8 is used for another situation of the air stream of Fig. 3 is described, the figure suitable with Fig. 2, Fig. 9 are the perspective view with the major component of the blade in the DC blower in the mode presentation graphs 1 that amplifies.
In the accompanying drawings, the main body of label 1 expression indoor set, label 2 expressions are arranged at the plate of the front of main body 1, label 3 expressions are arranged on the plate 2, be formed with the grid of air introducing port, label 4 expression is arranged on the end face of main body 1, form the top suction port of the end face introducing port of air, the relief opening that the bottom side of the close main body 1 of label 5 expressions is provided with previously, label 6 expressions are arranged at main body 1 inside, according to the heat exchanger that the mode relative with above-mentioned grid 3 is provided with, label 7 expressions are arranged at main body 1 inside, be oppositely arranged according to root edge portion with heat exchanger 6, admit the water receiving disc of the draining of heat exchanger 6.
In the DC blower that constitutes in the manner described above, when DC impeller 8 rotations, can be the separatrix with stabilizer 13, and produce following suction stream and discharge currents, this suction stream is through grid 3, top suction port 4 and by heat exchanger 6, above-mentioned discharge currents passes through the inside of DC impeller 8, and flows out towards outlet pipe 10.And by suction stream and discharge currents, form the orchid of corresponding position of stabilizer 13 that its center remains on the inside of DC impeller 8 in the following manner and agree combined vortex, this mode is: add outlet pipe 10 in orchid shown in Figure 3 is agree the ideograph of combined vortex.
Above-mentioned orchid is agree combined vortex and forms free vortex flow 25 in the outside of forced vortex 24, and this free vortex flow 25 is by outlet pipe 10 guiding, thereby the discharge currents of formation DC blower is promptly realized the air-supply function.Under these circumstances, when the front end 27 of outlet pipe 10 top underside 12 is positioned on the separatrix 26 of forced vortex 24 and free vortex flow 25, just obtains its efficient and reach the highest, further keep stable air-supply air-flow.
Fig. 4 and Fig. 5 are not positioned at the figure of the state of the fluid under the occasion on the separatrix 26 for the front end 27 of top underside 12 of expression outlet pipe 10, and Fig. 4 represents that front end 27 is arranged at the occasion of the inside of free vortex flow 25, and discharge currents reduces under this state.Fig. 5 represents that front end 27 is arranged at the occasion of the inside of forced vortex 24 in addition, produces loss because eddy current destroys under this state, and the efficient of blowing like this reduces.
The relation that orchid is agree between combined vortex and the stabilizer 13 describes below.Fig. 6 is the blue figure that agree the fundamental relation between combined vortex and the stabilizer 13 of expression, main stabilizer 28 realization following function, and soon blue free vortex flow 25 of agreeing in the combined vortex is separated into the inflow stream 30 towards eddy motion, and flows 31 from the outflow of eddy current.The separation of this free vortex flow 25 is that the pointed ends 29 by main stabilizer 28 realizes what eddy current separated.
In addition, because the different close pointed ends 29 of fluid of direction, promptly by the represented position of the broken circle among Fig. 6, the fluid of broken circle position is very unstable, and it is unstable that whole like this eddy current becomes.In addition, Fig. 7 refers in structure shown in Figure 6 for the phase diagram of the stable fluid of the maintenance under the following occasion of expression, this occasion, adds the opposing side 18 that is positioned at stabilizer 13 places at pointed ends 29 places of main stabilizer 28.
Therefore, unsettled relatively fluid is provided with main stabilizer 28, and opposing side 18 is provided with according to the mode that flows the extension of 30 1 sides towards the inflow of eddy motion.Thus, because the effect of opposing side 18 just is separated into towards the inflow stream 30 of eddy motion with from the outflow of eddy current and flows 31.Therefore,, thereby make the fluid that is positioned at pointed ends 29 places keep stable, make whole fluid keep stable in addition because by the represented position of the broken circle among Fig. 7, direction not homogeneous turbulence produces separation mutually.
In addition, Fig. 8 refers in structure shown in Figure 6 that for the phase diagram of the fluid of the following occasion of expression, this occasion at pointed ends 29 places of main stabilizer 28, the opposing side 18 that is positioned at stabilizer 13 places is to be provided with towards the mode that flows the extension of 3 one sides from the outflow of eddy current.At this moment, because from the effect of the outflow of eddy current stream 31, the side relative with DC impeller 8 in opposing side 18 produces new eddy current, can produce loss like this, thereby air-supply reduces.
Have again,, form by the shape of extending like this, then just obtain the fluid that its loss is less, high efficiency, maintenance is stable according to streamline along free vortex flow 25 because volute casing 9 is arranged at the inside that orchid is agree the free vortex flow 25 in the combined vortex.The streamline of above-mentioned free vortex flow 25 is and has the circular-arc of certain radius, is a circular-arc volute casing 9 that extends along the streamline of free vortex flow 25 by setting, just obtains the fluid that its loss is less, high efficiency, maintenance is stable.
According to mode described above, in the embodiment of Fig. 1～9, be provided with stabilizer 13, this stabilizer 13 has opposing side 18, this opposing side 18 forms in the following manner, this mode is: with the top underside 12 of following circular arc 15 with outlet pipe 10, be that intersection point between the elongation line of inner face of front one side of DC impeller 8 is as starting point 16, its lateral direction towards outlet pipe 10 is extended and formation terminal point 17, this circular arc 15 is formed on the napex inner face 12 of outlet pipe 10, the front of itself and DC impeller 8 is oppositely arranged, and its center is arranged at rotating center 14 places of DC impeller 8, and its diameter is more than 103% of diameter of DC impeller 8.
In addition, be provided with the negative camber 19 of following volute casing 9, it is formed by the shell circular arc, in this shell circular arc, spacing from the periphery intersection point 23 between the periphery of following straight line 22 and DC impeller 8 to end, inflow side 20 is more than 3% of DC impeller 8 diameters, and this straight line 22 is connected between the end, inflow side 20 and volute casing center 21 of volute casing 9, in addition, the perpendicular bisector of the line of connection source 16 and terminal point 17 is arranged at rotating center 14 places of DC impeller 8, the center of circle of above-mentioned shell circular arc coincides with the volute casing center 21 of the triangle inside that the rotating center 14 that is provided with by above-mentioned starting point 16 and terminal point 17 and DC impeller 8 forms, and with the straight line that connects end, above-mentioned inflow side 20 and volute casing center 21 as radius.
Therefore,, can obtain the fluid that its loss is less, high efficiency, maintenance is stable, the air-supply function well by DC blower.In addition, by this air-supply effect, loss reduces, and the ratio of the rotational speed of air quantity and DC impeller 8 increases like this.Thus, owing to can reduce the rotational speed of the DC impeller 8 under the equal in quality, reduce thereby can make through the flow velocity w on the blade face that forms the blade 32 in the DC impeller 8 shown in Figure 9.Like this, can make mainly is that noise noise that cause, that blade 32 is produced by DC blower reduces, and can obtain the DC blower that turns round in quiet mode.
The 2nd embodiment
Figure 10 and Figure 11 are the explanatory drawing of an example of other embodiments of the invention, this figure is used for the air stream of DC blower is described, it is equivalent to above-mentioned Fig. 2, the figure of Figure 11 for another air stream in the DC blower is described, and it is equivalent to above-mentioned Fig. 2.In addition, other structure among Figure 10 and Figure 11 is identical with the embodiment of above-mentioned Fig. 1～9, is made of DC blower.In the figure, identical with Fig. 1～9 label is represented corresponding part.
In the DC blower that forms in the manner described above, in the structure of Figure 10, there is not convex surface 36, direct current 34 flows into the top underside 12 of the angle of attack towards outlet pipe 10.Thus, form stripping area 35 in stabilizer 13 1 sides, the fluid near produces bigger disorder herein.Therefore, form unsettled fluid, produce loss, produce bigger noise in addition.
In addition, in the structure of Figure 11, be formed with convex surface 36, do not form stripping area 35 so substantially, the disorder near is little herein.Thus, less from the loss of the outflow of eddy current stream.Therefore,, can obtain that its loss further reduces, high efficiency, stable fluid, bring into play good air-supply effect, can obtain the effect identical with the embodiment of above-mentioned Fig. 1～9 because direct current 34 keeps stable.
The 3rd embodiment
Figure 12 also is an instance graph of expression other embodiments of the invention, and this figure is used for the air stream of DC blower is described, and it is equivalent to above-mentioned Fig. 2.In addition, other structure of Figure 12 is identical with above-mentioned Fig. 1～9 embodiments', is formed by DC blower.In the figure, the label identical with above-mentioned Fig. 1～9 represented corresponding part, label 37 expression outermost profile portion fluids, and it is formed at the outermost profile portion place on the blue separatrix 27 of agreeing forced vortex 24 in the combined vortex and free vortex flow 25.The opposing side of label 18 expression stabilizers 13, it is circular-arc along outermost profile portion fluid 37.
In the DC blower that forms according to mode, air stream near stabilizer 13 places is an outermost profile portion fluid 37, the opposing side 18 of stabilizer 13 is circular-arc according to what extend along this outermost profile portion fluid 37, and promptly the circular-arc mode that overlaps with the center of circle of volute casing 9 forms.Thus, the loss of outermost profile portion fluid 37 reduces, and the loss of the forced vortex 24 of stabilizer 13 vicinity is less, thereby can obtain high efficiency, stable fluid, brings into play good air-supply effect, can obtain the effect identical with the embodiment of above-mentioned Fig. 1～9.
The 4th embodiment
Figure 13 and Figure 14 also are the explanatory drawing of an example of other embodiments of the invention, the plotted curve that Figure 13 describes for the state to the air stream in the DC blower, Figure 14 is used for the state of the air stream of DC blower is described, and it is equivalent to above-mentioned Fig. 2.In addition, other structure of Figure 13 and Figure 14 is identical with the embodiment of above-mentioned Fig. 1～9, is formed by DC blower.
In the figure, the label identical with Fig. 1～9 represented corresponding part, and label 38 expressions are near the streamline of the air stream at negative camber 19 places of volute casing 9.In addition, the length of the end, inflow side 20 in the connection volute casing 9 and the straight line 22 at volute casing center 21, promptly the radius of the negative camber 19 of volute casing 9 is r.
In addition, the relation of the flow velocity in the flow field of volute casing 9 and radius r is as follows:
V θ * r
n=Γ ... formula (1)
Here, V θ: at the flow velocity of the eddy flow of DC impeller internal flow
N: speed index
Γ: the cyclic constant of fluid
In addition, according to above-mentioned formula (1), in 25 ones of the free vortex flows in the willing combined vortex of orchid, make curl from setting radius r in the mode of the scope of 0.85≤n≤0.1 on the occasion of the speed index n that is changed to negative value.In addition, Figure 13 agree the radius r of combined vortex and the plotted curve of the relation between peripheral compoent of velocity V θ, radius r and the curl ζ for expression is blue, this curl ζ generally can represent that according to following relation this relation is by the cyclic constant Γ and the speed index n of radius r, fluid:
ζ=Γ * (1-n) * r
-(1+n)Formula (2)
Have again, according to above-mentioned formula (2), under the situation of n＞1, curl ζ is a negative value, when the radius r with the negative camber 19 of volute casing 9 is set within this range, because as shown in figure 14, near negative camber 19 places,, have the counterrotating eddy current for the eddy current that DC impeller 8 is produced, can cause bigger loss by convection cell like this, thereby cause efficient to reduce.
Under the situation of n＜1, curl ζ is that V θ is dull the reduction along with the increase of radius r on the occasion of, shown in Figure 13 as the front.Thus, set radius r, the loss of the fluid that the flow velocity in the volute casing 9 causes is reduced, thereby realize high efficiency by making speed index n 1 the mode of leveling off to as far as possible.Under the situation of n=1, curl ζ is 0 in addition, when the radius r with the negative camber 19 of volute casing 9 is set within this range, can form break-even fluid, thereby obtains the air-supply effect of extreme efficiency.
Have, the occasion of the actual use such as indoor set 1 grade in air conditioner for the air stream that is produced in the DC blower, should be considered the change of the loss that produced again, under the situation of n=1 and from n＜1 convergence 1, sets the radius r with suitable scope.Thus, high efficiency, stable fluid can be obtained, good air-supply effect can be obtained.
In addition, in the embodiment of Figure 13 and Figure 14, the radius r that forms the negative camber 19 of volute casing 9 is set according to the mode of speed index n in the scope of 0.85≤n≤1.0.Thus,, can make the loss of fluid further be reduced to the limit like this, can obtain degree of stability and reach maximum, high efficiency fluid because negative camber 19 longshore current lines 38 extend.
Have, corresponding with the situation that loss that DC blower causes reduces, the air quantity in the DC impeller 8 and the ratio of rotational speed increase again.Therefore, because the rotational speed of DC impeller 8 under same air quantity can reduce, the flow velocity w that flows through from the blade face of the blade 32 that forms above-mentioned DC impeller 8 shown in Figure 9 reduces like this.Thus, can make mainly is that the noise of DC blower noise that cause, that blade 32 is produced reduces, can be in the DC blower that keeps turning round under the quiet situation thereby can obtain.
The 5th embodiment
Figure 15～17 also are an example of other embodiments of the invention, Figure 15 is used for the state of the air stream of DC blower is described, it is equivalent to above-mentioned Fig. 2, Figure 16 is the vertical side view of section that is used for the indoor set of the air conditioner that the shape to volute casing describes, vertical side view of section of the indoor set in the air conditioner that Figure 17 describes for other shape to volute casing.In addition, the embodiment's of other structure of Figure 15～17 and above-mentioned Fig. 1～9 is identical, is formed by DC blower.In the figure, the label identical with Fig. 1～9 represented corresponding part, and label 38 expressions are near the streamline of the air stream of the negative camber 19 of volute casing 9.
In addition, according to the radius r of the negative camber 19 of the volute casing among above-mentioned Figure 14 9, and the relation that the no dimension of the fluid loss degree that causes of the expression fluid that DC blower produced is counted between the ξ determines radius r by the mode that following formula 3 changes, and this formula 3 is:
R ∝ 1/ ξ ... formula 3
Thereby set the shape of volute casing 9.The i.e. bigger occasion of fluid loss that causes for the air-flow of DC blower, the radius r of the negative camber 19 of volute casing 9 reduces, and in addition in the less occasion of above-mentioned loss, the radius r of the negative camber 19 of volute casing 9 increases.
In addition, above-mentioned Figure 14 represents the fluid that is produced by DC blower and fluid under the bigger occasion of the fluid loss that causes, and Figure 15 represents the fluid under the less occasion of above-mentioned fluid loss in addition.Also have, 25 ones of the free vortex flows in volute casing 9 are located, curl ζ=0, and promptly the streamline 38 of speed index n=1 forms according to Figure 14 and mode shown in Figure 15.
In addition, the distance between eddy current center and streamline 38, when the radius that promptly forms streamline 38 was r ζ 0, in the bigger occasion of fluid loss, above-mentioned radius r ζ 0 reduced.Thus, in negative camber 19 vicinity of volute casing 9, its curl ζ is a negative value, and the eddy current owing to existing counterrotating herein can cause damage like this, thereby efficient is reduced.
For fear of such rough sledding,, the radius of the negative camber 19 that forms volute casing 9 is reduced in the bigger occasion of fluid loss.In addition, in the less occasion of fluid loss, above-mentioned radius r ζ 0 increases, and is increasing near negative camber 19 place's flow velocitys, and consequent loss increases, thereby causes efficient to reduce.For fear of such rough sledding,, the radius r of the negative camber 19 that forms volute casing 9 is increased in the less occasion of fluid loss.
In addition, the occasion of the actual use such as indoor set 1 grade in air conditioner for the air stream that DC blower produced, can produce the pressure loss in above-mentioned grid 3, top suction port 4 and heat exchanger 6.In order to prevent this pressure loss, form the negative camber 19 of volute casing 9 according to following described mode.
That is, in the occasion that the thickness of heat exchanger 6 increases, shown in the dotted line among Figure 16, the radius r that forms negative camber 19 reduces.The occasion that reduces at the thickness of heat exchanger 6 in addition, shown in the dotted line among Figure 17, the radius r that forms negative camber 19 increases.Thus, can obtain fluid high efficiency, that maintenance is stable, noise is reduced, can obtain the DC blower that can under quiet situation, turn round.
According to top description, the present invention is provided with DC impeller, is provided with volute casing in the back of this impeller, outlet pipe, and this outlet pipe is according to keeping the ways of connecting setting with above-mentioned volute casing; Stabilizer, this stabilizer is formed on the above-mentioned outlet pipe, and be provided with according to the mode relative with the front of DC impeller, it has opposing side, this opposing side constitutes in the following manner, this mode is: with the intersection point between the elongation line of the inner face of DC impeller front one side in following circular arc and the above-mentioned outlet pipe is starting point, lateral direction towards outlet pipe prolongs and the formation terminal point, and the rotating center place that is centered close to DC impeller of this circular arc, its diameter is more than 103% of diameter of DC impeller; The negative camber of volute casing, it is formed by following shell circular arc, in this shell circular arc, spacing from the periphery intersection point between the periphery of following straight line and DC impeller to the end, inflow side is more than 3% of diameter of DC impeller, and this straight line is connected between the end, inflow side and volute casing center of volute casing, the perpendicular bisector of the straight line between starting point and the terminal point is arranged at the rotating center place of DC impeller in addition, the center of circle of above-mentioned shell circular arc coincides with the volute casing center of the triangle inside that the rotating center that is provided with by above-mentioned starting point and terminal point and DC impeller forms, and with the straight line that connects end, above-mentioned inflow side and volute casing center as radius.
Therefore, can obtain following effect, promptly for the air stream that DC blower produced, the loss of whole fluid reduces, and can obtain fluid high efficiency, that maintenance is stable, obtains good air-supply effect.In addition, the noise of DC blower is reduced, make the running environment keep quiet.
In addition, according to above-described mode, the starting point place of the opposing side of the present invention in stabilizer is provided with convex surface.
Therefore, can obtain following effect, promptly for the air stream that DC blower produced, not form the stripping area that is positioned at stabilizer one side substantially, particularly the loss of flowing from the outflow of eddy current reduces.Thus, can obtain fluid high efficiency, that maintenance is stable, obtain good air-supply effect.In addition, the noise of DC blower is reduced, make the running environment keep quiet.
In addition, according to above-described mode, the present invention is formed with the opposing side of stabilizer along following circle, and this circle is the center of circle with the volute casing center.
Therefore, for the air stream that DC blower produced, particularly the loss that causes near the forced vortex at stabilizer place reduces.Thus, can obtain following effect, promptly obtain high efficiency, maintenance steady flow, obtain good air-supply effect.Have in addition the noise of DC blower is reduced, make the running environment keep quiet effect.
Also have, in DC blower of the present invention, form convex surface at the starting point place of the opposing side of stabilizer, the opposing side of stabilizer forms along the circle that with the volute casing center is the center of circle.
Therefore, for the air stream that DC blower produced, do not form the stripping area of stabilizer one side substantially, particularly the loss of flowing from the outflow of eddy current reduces.In addition, the loss of the forced vortex at close especially stabilizer place reduces.Thus, have following effect, promptly obtain fluid more high efficiency, that maintenance is stable, obtain good air-supply effect.In addition, have the noise of DC blower is reduced, make the running environment keep quiet effect.
In addition, according to above-described mode, in the present invention, when the radius of representing the negative camber of volute casing with r, V θ represents to flow through the flow velocity of the eddy flow of DC impeller inside, and n represents the speed index, when Γ represents the cyclic constant of fluid, then
Vθ×r
n＝Γ
In the formula, by making the mode of speed index n in the scope of 0.85≤n≤0.1 set the radius r of the negative camber of volute casing.
Therefore, can make along the fluid loss of the streamline of the DC blower of the negative camber of volute casing and be reduced to the limit, obtain degree of stability and reach maximum, high efficiency fluid.Thus, have can obtain more high efficiency, keep stable fluid, obtain good air-supply effect.In addition, have the noise of DC blower is reduced, make the running environment keep quiet effect.
In addition, according to above-described mode, in the present invention, when the radius of representing the negative camber of volute casing with r, V θ represents to flow through the flow velocity of the eddy flow of DC impeller inside, and n represents the speed index, when Γ represents the cyclic constant of fluid, then
Vθ×r
n＝Γ
In the formula, set the radius r of the negative camber of volute casing by making the mode of speed index n in the scope of 0.85≤n≤0.1, and for the fluid that DC impeller produced, the bigger occasion of the pressure loss of the outer fluid that produces of DC blower, radius r reduces, in the less occasion of the above-mentioned pressure loss, above-mentioned radius r is bigger.
Therefore, being positioned at the loss that the counterrotating eddy current of the negative camber vicinity of volute casing causes reduces, fluid loss along the DC blower air-supply streamline of the negative camber of volute casing can be reduced to the limit, thereby obtains stable maximum, the high efficiency fluid that reaches.Thus, have the fluid that acquisition is more high efficiency, maintenance is stable, obtain the effect of good air-supply effect.In addition, have the noise that can make DC blower and reduce, make the running environment keep quiet effect.
Have, according to above-described mode, in the present invention, when the radius of representing the negative camber of volute casing with r, V θ represents to flow through the flow velocity of the eddy flow of DC impeller inside again, and n represents the speed index, when Γ represents the cyclic constant of fluid, then
Vθ×r
n＝Γ
In the formula, set the radius r of the negative camber of volute casing by making the mode of speed index n in the scope of 0.85≤n≤0.1, and for the fluid that DC impeller produced, be arranged at the bigger occasion of the pressure loss that the device of the suction side of DC impeller causes, radius r reduces, in the less occasion of the above-mentioned pressure loss, above-mentioned radius r is bigger.
Therefore, the pressure loss that can cause the device of the suction side that is arranged at DC impeller is reacted, can make along the loss of the fluid of the air-supply streamline of the DC blower of the negative camber of volute casing and be reduced to the limit, obtain degree of stability and reach maximum, high efficiency fluid.Thus, have the fluid that acquisition is more high efficiency, maintenance is stable, obtain the effect of good air-supply effect.In addition, have the noise that can make DC blower and reduce, make the running environment keep quiet effect.
In addition, according to above-described mode, in the present invention, when the radius of representing the negative camber of volute casing with r, V θ represents to flow through the flow velocity of the eddy flow of DC impeller inside, and n represents the speed index, when Γ represents the cyclic constant of fluid, then
Vθ×r
n＝Γ
In the formula, by making the mode of speed index n in the scope of 0.85≤n≤0.1 set the radius r of the negative camber of volute casing.
R is except above-mentioned setting, for the fluid that DC impeller produced, the bigger occasion of the pressure loss of the outer fluid that is produced of DC blower, radius reduces, increase in the above-mentioned radius r of the less occasion of the above-mentioned pressure loss, and, count relation between the ξ with the no dimension of the fluid loss degree of expression fluid that relative DC blower produces, according to following formula with regard to the radius r of the negative camber of volute casing
r∝1/ξ
Set radius r.
Therefore, DC impeller is arranged at the optimal position in the volute casing.Thus, the pressure loss of the outer fluid that is produced of DC blower reduces, and can be reduced to the limit along the fluid loss of the air-supply streamline of the DC blower of the negative camber of volute casing, obtains degree of stability and reaches maximum, high efficiency fluid.Thus, have can obtain high efficiency, keep stable fluid, obtain better air-supply effect.In addition, have the noise of DC blower is reduced, make the running environment keep quiet effect.
Claims (9)
1. DC blower, it realizes the blowing of air be is characterized in that it comprises by DC impeller:
Outlet pipe, it leads to the air that above-mentioned DC impeller blowed:
Stabilizer, it is arranged on the above-mentioned outlet pipe according to the mode relative with the front of above-mentioned DC blower;
Volute casing, it is to be arranged at the back of above-mentioned DC impeller with above-mentioned outlet pipe ways of connecting;
The aforementioned stable utensil has following curved surface, and this curved surface is to be formed by near its circular arc that is centered close to the rotating center of above-mentioned DC impeller;
Above-mentioned curved surface be arranged near the following starting point and following terminal point between, this starting point is arranged at the elongation line of above-mentioned outlet pipe and the intersection point place between the above-mentioned circular arc, above-mentioned terminal point is arranged at sense of rotation one side of the DC impeller point place away from above-mentioned starting point;
Spacing between above-mentioned curved surface and the above-mentioned DC impeller is more than 3% of radius of above-mentioned DC impeller;
The center of above-mentioned starting point, above-mentioned terminal point and above-mentioned DC impeller is provided with according to the perpendicular bisector of the straight line that connects above-mentioned starting point and the above-mentioned terminal point mode by above-mentioned center;
Above-mentioned volute casing comprises the negative camber that is formed by the shell circular arc;
Above-mentioned shell circular arc is following circular arc, this center of arc is arranged in the triangle inside that is formed centrally by above-mentioned terminal point and above-mentioned DC impeller, and the length of imaginary line that connects the end, inflow side of above-mentioned center of arc and above-mentioned volute casing is the radius of this circular arc;
The periphery intersection point that intersects to form between the periphery of above-mentioned imaginary line and above-mentioned DC impeller, and the spacing between the end, inflow side of above-mentioned volute casing is more than 3% of diameter of above-mentioned DC impeller.
2. DC blower according to claim 1, the curved surface that it is characterized in that the aforementioned stable device is to be formed by following circular arc, this center of arc is positioned at the rotating center place of above-mentioned DC impeller, and the diameter of this circular arc is more than 103% of diameter of above-mentioned DC impeller.
3. DC blower according to claim 2 is characterized in that the aforementioned stable device has convex surface near the starting point of above-mentioned curved surface.
4. DC blower according to claim 1, the curved surface that it is characterized in that the aforementioned stable device are to form along the regulation imaginary circle that is the center of circle with the center of arc of above-mentioned volute casing.
5. DC blower according to claim 4 is characterized in that the aforementioned stable device has convex surface near the starting point of above-mentioned curved surface.
6. according to any one the described DC blower in the claim 1～5, it is characterized in that representing with r at the radius of the negative camber of above-mentioned volute casing, flow velocity at the eddy flow of the internal flow of above-mentioned DC impeller is represented with V θ, the speed index is represented with n, the occasion that the cyclic constant of stream is represented with Γ, according to the mode of speed index n, by following formula in the scope of 0.85≤n≤0.1
Vθ×r
n＝Γ
Determine radius r.
7. DC blower according to claim 6, the radius r that it is characterized in that the negative camber of above-mentioned volute casing, in the course of action of above-mentioned DC impeller, set lessly in the bigger occasion of the pressure loss that the outside produced of DC blower, set greatlyyer in the less occasion of the above-mentioned pressure loss.
8. DC blower according to claim 7, the radius r that it is characterized in that the negative camber of above-mentioned volute casing, the bigger occasion of the suction pressure that device produced loss in the suction side that is arranged at above-mentioned DC impeller is set lessly, sets greatlyyer in the less occasion of above-mentioned suction pressure loss.
9. DC blower according to claim 7, the radius r that it is characterized in that the negative camber of above-mentioned volute casing, determine in the following manner, this mode is: itself and be illustrated in the relation that the no dimension of the damaed cordition of the stream that DC blower inside produced counts between the ξ and represent that by following formula this formula is: r ∝ 1/ ξ.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3606/98 | 1998-01-12 | ||
| JP3606/1998 | 1998-01-12 | ||
| JP00360698A JP3649567B2 (en) | 1998-01-12 | 1998-01-12 | Once-through fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1223360A CN1223360A (en) | 1999-07-21 |
| CN1115523C true CN1115523C (en) | 2003-07-23 |
Family
ID=11562160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98118773 Expired - Fee Related CN1115523C (en) | 1998-01-12 | 1998-08-27 | DC blower |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0928899B1 (en) |
| JP (1) | JP3649567B2 (en) |
| CN (1) | CN1115523C (en) |
| DE (1) | DE69820976T2 (en) |
| ES (1) | ES2212179T3 (en) |
| HK (1) | HK1021656A1 (en) |
| TW (1) | TW360767B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3497073B2 (en) * | 1998-01-19 | 2004-02-16 | 三菱電機株式会社 | Once-through blower |
| WO2002029331A1 (en) | 2000-09-29 | 2002-04-11 | Mitsubishi Denki Kabushiki Kaisha | Air conditioner |
| ITVI20020145A1 (en) * | 2002-07-02 | 2004-01-02 | Comefri Spa | ANTI-NOISE AND ANTI-VORTE DIVIDER |
| DE502006005157D1 (en) | 2005-07-28 | 2009-12-03 | Ebm Papst St Georgen Gmbh & Co | heater |
| CN1955564B (en) * | 2005-10-27 | 2010-05-05 | 乐金电子(天津)电器有限公司 | Indoor unit of split air conditioner |
| JP2007120880A (en) * | 2005-10-28 | 2007-05-17 | Mitsubishi Electric Corp | Cross flow fan |
| JP5029109B2 (en) * | 2007-04-12 | 2012-09-19 | パナソニック株式会社 | Air conditioner |
| JP5862655B2 (en) * | 2013-12-27 | 2016-02-16 | ダイキン工業株式会社 | Air conditioning indoor unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2934987A1 (en) * | 1979-08-30 | 1981-03-19 | Kurt Dr.-Ing. 7500 Karlsruhe Zenkner | Roof ventilator with centrifugal fan - has spiral plate and body for flat pressure-volume characteristic |
| DE8034229U1 (en) * | 1980-12-22 | 1986-07-03 | Ltg Lufttechnische Gmbh, 7000 Stuttgart | Tangential fan |
| FR2619422B1 (en) * | 1987-08-13 | 1989-12-08 | Onera (Off Nat Aerospatiale) | CROSS-CURRENT FAN |
| JPH05296479A (en) * | 1992-04-17 | 1993-11-09 | Toshiba Corp | Indoor unit for air conditioning device |
| JP2642900B2 (en) * | 1995-04-14 | 1997-08-20 | 三洋電機株式会社 | Air conditioner |
-
1998
- 1998-01-12 JP JP00360698A patent/JP3649567B2/en not_active Expired - Lifetime
- 1998-07-10 TW TW087111265A patent/TW360767B/en not_active IP Right Cessation
- 1998-07-31 ES ES98114422T patent/ES2212179T3/en not_active Expired - Lifetime
- 1998-07-31 EP EP19980114422 patent/EP0928899B1/en not_active Expired - Lifetime
- 1998-07-31 DE DE1998620976 patent/DE69820976T2/en not_active Expired - Lifetime
- 1998-08-27 CN CN 98118773 patent/CN1115523C/en not_active Expired - Fee Related
-
2000
- 2000-01-20 HK HK00100364A patent/HK1021656A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0928899A2 (en) | 1999-07-14 |
| DE69820976T2 (en) | 2004-10-21 |
| ES2212179T3 (en) | 2004-07-16 |
| TW360767B (en) | 1999-06-11 |
| DE69820976D1 (en) | 2004-02-12 |
| CN1223360A (en) | 1999-07-21 |
| EP0928899A3 (en) | 2000-05-03 |
| JPH11201487A (en) | 1999-07-30 |
| HK1021656A1 (en) | 2000-06-23 |
| JP3649567B2 (en) | 2005-05-18 |
| EP0928899B1 (en) | 2004-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1261693C (en) | Radiator fan and engine cooling device using it | |
| CN1254611C (en) | Fan | |
| EP2476912B1 (en) | Propeller fan, molding die, and fluid feed device | |
| CN1217104C (en) | Ventilation pumping device | |
| KR101320805B1 (en) | Fan blades and modifications | |
| US8348593B2 (en) | Serial axial fan | |
| CN1195161C (en) | Air blower and determining method for its seam shape | |
| EP2381113B1 (en) | Propeller fan, fluid feeder and molding die | |
| CN1201514A (en) | Outlet unit for underfloor air conditionor and underfloor air conditioning system using same | |
| CN1697932A (en) | Blower | |
| CN1115523C (en) | DC blower | |
| CN1300468C (en) | Axial_flow fan | |
| CN102269169A (en) | Through-flow fan and air-conditioner provided with same | |
| CN1179525A (en) | Cooking bonnet type exhausting fan | |
| CN1813134A (en) | Centrifugal fan and apparatus using the same | |
| CN1820166A (en) | Air conditioner | |
| CN1323952A (en) | Direct flow fan, and air conditioner having said fan | |
| JP4388993B1 (en) | Propeller fan, fluid feeder and mold | |
| CN200982317Y (en) | Small size ceiling type fan | |
| CN201687736U (en) | Cross flow fan and air conditioner with same | |
| CN1056672C (en) | Centrifugal blower | |
| CN106762829B (en) | Blade for impeller, impeller and fan | |
| CN1598325A (en) | Low-noise strong blast volume axial-flow fan | |
| CN110566503B (en) | Centrifugal fan blade, centrifugal fan, air conditioner and transportation means | |
| CN101038001A (en) | Centrifugal multiblade fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030723 Termination date: 20150827 |
|
| EXPY | Termination of patent right or utility model |