CN102016327A - Blower and heat pump device using same - Google Patents
Blower and heat pump device using same Download PDFInfo
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- CN102016327A CN102016327A CN2009801143353A CN200980114335A CN102016327A CN 102016327 A CN102016327 A CN 102016327A CN 2009801143353 A CN2009801143353 A CN 2009801143353A CN 200980114335 A CN200980114335 A CN 200980114335A CN 102016327 A CN102016327 A CN 102016327A
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- expansion section
- outer periphery
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
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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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
- F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
- F04D29/526—Details of the casing section radially opposing blade tips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/40—Vibration or noise prevention at outdoor units
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Provided is a blower, in which even if there is a non-uniformity due to the circumferential position of a suction side-air passage around a rotary shaft, the disturbance of the flowing-in air stream is reduced, thereby reducing noise. The blower comprises a blade (1) having an outer peripheral edge (1c) with a camber recessed in the rotating direction and a bell mouth (5) covering the blowout side-outer periphery of the blade. The blade side surface of the bell mouth comprises a first upstream side enlarged part (5c) so formed as to extend from the minimum inner diameter position (Pb3) to the upstream side and to project in the upstream direction of the rotary shaft, and a second upstream side enlarged part (5d) so formed as to further extend from the first enlarged part to the upstream side and to be recessed in the upstream direction of the rotary shaft.
Description
Technical field
The present invention relates to have the propeller fan form of horn mouth and impeller gas fan, and use the heat pump system of this gas fan, particularly relate to the improvement of bell-mouthed structure.
Background technique
In order to obtain the little gas fan of noise, need reduce to flow into the turbulent flow of the air-flow in the gas fan with doing one's utmost.In the past, in gas fan, by improving the reducing that bell-mouthed shape realizes the air-supply noise with horn mouth and impeller.For example, (for example has such technological scheme, with reference to patent documentation 1), that is, press the curved shape enlarged towards upstream side from the straight pipe portion of horn mouth internal diameter minimum, towards radial outside line part is set from its end again, like this, even in the peristoma portion of this line part peeling off of air-flow taken place temporarily, air-flow also can along between the line part flow periods little by little once more attached to its inner face, after this by level and smooth mobile being inhaled in the horn mouth, reduce the sound of blowing thus.
In addition, proposition (for example has such scheme, with reference to patent documentation 2), promptly, bend to roughly semicircular cross-section shape by bell-mouthed suction side wall portion being formed from the inner peripheral surface of suction port towards foreign side radially, can suppress air the peeling off of suction port part, reduce the blower running noise.
In addition, proposition (for example has such scheme, with reference to patent documentation 3), promptly, the front panel of the outdoor unit of air conditioner is remained rectangular, and, for bell-mouthed shape, corresponding to the cycle side plate up and down that surrounds its outdoor unit casing on every side and the distance of impeller periphery, begin to change the size of curvature of the enlarged-diameter curved part of upstream side from horn mouth internal diameter least part, thereby can set near the different corresponding orifice shapes of inflow flow angle the aperture with impeller, reduce near the aperture flow peel off, realize low noiseization.
Patent documentation 1: TOHKEMY 2003-184797 communique (Fig. 1～Fig. 3)
Patent documentation 2: No. 3084790 communique of Japan Patent (Fig. 1, Fig. 2)
Patent documentation 3: No. 2769211 communique of Japan Patent (the 2nd figure, the 3rd figure)
Summary of the invention
; be provided with the line part that extends towards radial outside in bell-mouthed peristoma portion; or bell-mouthed suction side wall portion formed from the inner peripheral surface of suction port towards foreign side radially bend to roughly semicircular cross-section shape; air-flow the peeling off on horn mouth that minimizing flows into from the outer periphery from blade of the air-flow that flows into when the zone of being blocked by horn mouth when the blade of gas fan is observed etc.; in this occasion, only at desirable wind path environment, to be the center with the running shaft promptly circumferentially using its function of gas fan competence exertion under the wind path environment uniformly.Yet, the wind path environment of reality as the running gas fan, desirable wind path environment so seldom has, in addition, even the wind path environment is the center with the running shaft circumferentially evenly, the situation of high uniformity is stablized, had to the liquid stream that does not also flow into gas fan basically, if observe from the blade of rotation, the change often of flowing that flows into, turbulent flow is big, can not give full play to its function.
In addition, to in air conditioner, carry gas fan as prerequisite, the nonuniformity that causes corresponding to the circumferential position by the suction side wind path changes the size of bell-mouthed curvature, in such occasion, rest on the effect of peeling off etc. that reduces on the horn mouth, do not reduce the effect of the turbulent flow of the air-flow that flows into itself.
Technical task of the present invention is, is the occasion of the nonuniformity that causes of the circumferential position at center existing by the running shaft with the suction side wind path, also can reduce the turbulent flow of the air-flow of inflow itself, can obtain the gas fan of low noise.
Gas fan of the present invention has blade and horn mouth, and this blade has the outer periphery that form the concavity warpage to sense of rotation, and what this horn mouth covered blade blows out the side periphery; Bell-mouthed blade side comprises first expansion section, upstream and second expansion section, upstream; This first expansion section, upstream forms convex from the side extension upstream of internal diameter minimum position to the running shaft updrift side; This second expansion section, upstream is the further side extension upstream continuously of first expansion section from the upstream, forms concavity to the running shaft updrift side.
The effect of invention
In gas fan of the present invention, bell-mouthed blade side comprises first expansion section, upstream and second expansion section, upstream; This first expansion section, upstream forms convex from the side extension upstream of internal diameter minimum position to the running shaft updrift side; This second expansion section, upstream is the further side extension upstream continuously of first expansion section from the upstream, forms concavity towards the running shaft updrift side; So, can surround the outer periphery of blade, and increase the outer periphery of blade and the distance between the horn mouth.Therefore, can be taken into more air-flow, suppress the pressure oscillation of the loudspeaker actinal surface that the turbulent flow by the blade end eddy current causes from the outer periphery of blade.In addition, can suppress to obtain the little gas fan of noise in the wind path homogenization on every side of the outer periphery that circumferentially make blade towards the change of the air-flow of blade inflow.In addition, the axial upstream side of second expansion section from the upstream can be formed continuous shape smoothly to the part of internal diameter minimum position, can suppress the turbulent flow of air-flow itself, can reduce noise by good efficiency.
Description of drawings
Fig. 1 is the front view from the gas fan that blows out side space observation embodiment of the present invention 1.
Fig. 2 looks sectional view for the A-A alignment of Fig. 1.
Fig. 3 has added the figure of the line of the position of representing the each several part in the horn mouth thereon for the outer periphery of the B-B alignment of Fig. 1 being looked the blade in the section are launched into the plane.
Fig. 4 be Fig. 2 want portion's enlarged view.
Fig. 5 is near the figure of the line of the stream condition the outer periphery of further having added the expression blade in Fig. 3.
Fig. 6 compares the explanatory drawing of representing for added bell-mouthed line in the past in Fig. 2.
Fig. 7 looks sectional view (b) for the front view (a) and the C-C alignment of the outdoor unit of the air conditioner of embodiment of the present invention 2,6.
Fig. 8 is the figure of the direction of the wind path of observing from running shaft of the outdoor unit of the air conditioner of explanation embodiment of the present invention 2,6.
Fig. 9 is for the front view (a) of the outdoor unit of the air conditioner of embodiment of the present invention 3 and the D-D alignment is looked sectional view (b) and the E-E alignment is looked sectional view (c).
Figure 10 is the figure of the direction of the wind path of observing from running shaft of the outdoor unit of the air conditioner of explanation embodiment of the present invention 3.
Figure 11 is from the horn mouth of the air conditioner of suction side observation embodiment of the present invention 3 and the local amplification view of wanting portion of propeller fan.
Figure 12 for front view (a), the F-F alignment of the outdoor unit of the heat pump type hot water supply device of embodiment of the present invention 4 look sectional view (b), and the G-G alignment look sectional view (c).
Figure 13 be embodiment of the present invention 5 gas fan want portion's enlarged view.
Figure 14 has added the line of the position of the each several part in the expression horn mouth thereon for the outer periphery with the blade of the gas fan of embodiment of the present invention 5 are launched into the plane, has also added near the figure of line of the state of the air-flow the expression blade outer periphery.
Figure 15 for the gas fan of in the past comparatively representing embodiment of the present invention 5 want portion's enlarged view.
Figure 16 for the chart of the aerodynamic force noise properties of the heat pump system of in the past comparatively representing embodiment of the present invention 7.
Figure 17 for the chart of the aerodynamic force noise properties of the heat pump system of in the past comparatively representing embodiment of the present invention 7.
Figure 18 is the figure of the shape of the blade of the propeller fan of explanation embodiment of the present invention 7.
Figure 19 is the figure of the shape of the blade of the propeller fan of explanation embodiment of the present invention 7.
Symbol description
1 blade
The 1c outer periphery
Pb3 internal diameter minimum position
Pb4 point (transfer portion)
The maximum warpage of Pf3 position
5 horn mouths
First expansion section, 5c upstream
Second expansion section, 5d upstream
The 3rd expansion section, 5e upstream
13 blow out face
15 heat exchangers (side)
The upper surface of 17 casings
18 lower panels (side)
22 separating plates (side)
23 end warpages (curved surface)
Embodiment
Mode of execution 1
Below, according to illustrated embodiment explanation the present invention.
Fig. 1 is the front view from the gas fan that blows out side space observation embodiment of the present invention 1, Fig. 2 looks sectional view for the A-A alignment of Fig. 1, Fig. 3 is launched into the plane, has added the figure of line of the position of the each several part in the expression horn mouth thereon for the outer periphery that the B-B alignment of Fig. 1 is looked the blade in the sectional view, Fig. 4 be Fig. 2 want portion's enlarged view, Fig. 5 is near the figure of the line of the stream condition the outer periphery of further having added the expression blade in Fig. 3, and Fig. 6 compares the explanatory drawing of representing for added bell-mouthed line in the past in Fig. 2.
The gas fan of present embodiment is driven by 7 pairs of blower motors have a plurality of blades 1 around propeller boss 2 propeller fans 3, blade 1 by with the commissura of propeller boss 2, towards the leading edge 1a of sense of rotation, with in opposite directions trailing edge 1b of leading edge 1a, with commissura in opposite directions and be connected leading edge 1a and trailing edge 1b outer periphery 1c, reach the curved surface that surrounds by these commissuras, leading edge 1a, trailing edge 1b and outer periphery 1c and form.The face towards sense of rotation 10 of curved surface becomes pressure side 1d, and the back side of this pressure side 1d becomes suction surface 1e.Point Pf1 is the intersection point of leading edge 1a and outer periphery 1c, and Pf2 is the intersection point of trailing edge 1b and outer periphery 1c.Outer periphery 1c has recessed warpage in sense of rotation 10 as shown in Figure 3.The blade string of a musical instrument 4 of tie point Pf1 and some Pf2 becomes maximum maximum warpage position with the distance of outer periphery 1c and is a Pf3.
In Fig. 2 and Fig. 4, the line of blade 1 is represented the rotating locus of leading edge 1a, trailing edge 1b and outer periphery 1c.In addition, here, the axle that will become the rotating center of blower motor 7 and propeller fan 3 is called running shaft, with the suction direction in space of running shaft, be that the paper left side of Fig. 2 is made as the running shaft updrift side, with running shaft blow out direction in space, be that the paper right side of Fig. 2 is called the running shaft downstream direction.
The wind path enlarged shape of the suction side direction of horn mouth 5 (if being seen as the contracted flow shape from the flow direction of air-flow) is as follows.That is, to a Pb4, has the upstream first expansion section 5c that forms convex to the running shaft updrift side from the some Pb3 of the running shaft updrift side end of the internal diameter minimum 5b of portion that becomes horn mouth 5.Has with the upstream first expansion section 5c upstream second expansion section 5d that links to each other, forms concavity to the running shaft updrift side from a Pb4 to a Pb5.The second expansion section 5d in the upstream, curvature is big near a Pb4, and curvature diminishes near a Pb5, forms conic section substantially near the some Pb5 as upstream portion.To a Pb6, has with the upstream second expansion section 5d upstream the 3rd expansion section 5e that links to each other, forms convex to the running shaft updrift side from a Pb5.
Below, according to Fig. 3 and Fig. 4 be described concerning in the axial position of rotation of propeller fan 3 and horn mouth 5.In Fig. 3, dotted line Lb3, Lb4, Lb5, Lb6 use the line of the axial position of rotation of some Pb3 on the horn mouth 5 that Fig. 4 illustrated in front, Pb4, Pb5, Pb6 for expression.In Fig. 4, dotted line Lf3 is the line of the axial position of rotation of the maximum warpage position Pf3 of the outer periphery 1c of expression blade 1.Become the some Pb3 of end of running shaft updrift side of the internal diameter minimum 5b of portion of horn mouth 5, more be in running shaft direction upstream side than the trailing edge side end Pb2 of the outer periphery 1c of blade 1.Be in the some Pb4 of the transfer portion of the upstream first expansion section 5c of horn mouth 5 and the upstream second expansion section 5d, more be in running shaft direction downstream side than the maximum warpage position Pf3 of the outer periphery 1c of blade 1.That is, the axial position of rotation of the maximum warpage position Pf3 of the outer periphery 1c of blade 1 is in the scope that is contained in the upstream second expansion section 5d.
Below, the action of the gas fan of present embodiment is described according to Fig. 1～Fig. 5.
In the gas fan that constitutes as described above, if the driving force by blower motor 7 makes propeller fan 3 rotations, then the gas in the zone of propeller fan 3 rotations is expressed into and blows out the side space beta, and the gas of suction side space alpha flow into the zone of propeller fan 3 rotations.The face that gas constitutes from the rotating locus by blade inlet edge 1a, the face that is made of the rotating locus of the outer periphery 1c of blade 1 flow into propeller fan 3.Like this, produce air-flow from the suction side space alpha to blowing out the side space beta.
Flow into the part of the gas of propeller fan 3, as shown in Figure 5 via the outside of outer periphery 1c, become the leakage current 8 that flows to suction surface 1e from pressure side 1d.With near produce the leading edge of outer periphery 1c leakage current 8 is basic point, produces in the position along outer periphery 1c of suction surface 1e to have flowing of the eddy current structure that is called as blade end eddy current 9.Blade end eddy current 9 is grown up along with shifting from front edge side toward the trailing edge side, and near the outer periphery 1c from blade 1 the maximum warpage position Pf3 that turns to the outer periphery 1c that becomes big that flows breaks away from.The blade end eddy current 9 that has broken away from from outer periphery 1c weakens the structure as eddy current on one side, from suction side space alpha flowed to the mobile promotion of the integral body that blows out side space beta on one side, simultaneously gradually towards blowing out the side space beta, emitting from gas fan.
Below, the position relation of the horn mouth 5 that is in the downstream side and the outer periphery 1c of blade 1 is described.Gas fan need and blow out maintenance and the corresponding pressure reduction of flow between the side space beta in the suction side space alpha in order to produce required flow.The narrowest position between blade 1 and the horn mouth 5 is the outer periphery 1c for internal diameter minimum 5b of portion from a Pb2 to a Pb3 and blade 1.In the present embodiment, setting the part that becomes the narrowest between this blade 1 and the horn mouth 5 near the trailing edge 1b of outer periphery 1c.If this distance is wide, then the big occasion of flowing resistance before and after gas fan can not obtain needed pressure reduction, flow.Therefore, make horn mouth 5 and the distance between the blade 1 near the trailing edge 1b of outer periphery 1c narrower here.This clearance distance is preferably about 1～3% of blade external diameter (turning-circle diameter of outer periphery 1c).
Below, the position relation of horn mouth 5 with the outer periphery 1c of blade 1 of upstream side is described.Such as already described, the face that is made of the rotating locus of the outer periphery 1c of blade 1 becomes the inflow face of air-flow.In the occasion that obtains from the area of broad to flow into, have airspeed when reducing same flow, reduce the effect of noise.From this viewpoint, preferably upstream side is that the horn mouth 5 of inflow side of air-flow is enough wide with the distance of the outer periphery 1c of blade 1.In addition, the outer periphery 1c of blade 1 also is that blade end eddy current 9 generates, grows up, reaches the place that breaks away from.Blade end eddy current 9 is for having flowing of big turbulent flow, if there is the wall of horn mouth 5 grades nearby, then the pressure oscillation on the wall becomes big, becomes the reason of noise.From this viewpoint, also preferably make between the outer periphery 1c of the horn mouth 5 of upstream side and blade 1 enough wide.
Yet, such as already described in the use of the gas fan of reality, in the space alpha of suction side blade 1 around non-constant width and become in the occasion of circumferential uniform shape very rare.The air-flow that flow into blade 1 becomes easily at circumferential uneven air-flow, and in the occasion of observing from the blade 1 of rotation, flowing of inflow becomes in time, becomes noise and becomes big reason.From this viewpoint,, be preferably in and circumferentially make the wind path shape even in order to obtain the gas fan of low noise, therefore, preferably the outer periphery 1c of blade 1 around cover by horn mouth 5.
Promptly, in order when keeping suction side space alpha and the pressure reduction that blows out the side space beta, to obtain the gas fan of low noise, the distance that is preferably between near the outer periphery 1c that makes horn mouth 5 and blade 1 the trailing edge 1b is narrow and small, guarantees wide space at upstream side more, and more air-flow is flowed into.In addition, pressure oscillation for the horn mouth wall that suppresses to cause by blade end eddy current 9, when being preferably in the outer periphery 1c that surrounds blade 1, the distance that the outer periphery 1c of increase blade 1 and horn mouth are 5, the noise that the nonuniformity of inhibition wind path shape causes increases.
In the gas fan of present embodiment, has the upstream second expansion section 5d that forms concavity towards the running shaft updrift side continuously with the upstream first expansion section 5c that forms convex towards the running shaft updrift side, so, also can learn from Fig. 6, compare the shape that the general in the past bending sections 11 (dotting in the drawings) by form convex from internal diameter minimum portion towards the running shaft updrift side that uses enlarges upstream side, can be in the outer periphery 1c that surrounds blade 1, the distance that the outer periphery 1c of increase blade 1 and horn mouth are 5.Like this, can be taken into more air-flow from the outer periphery 1c of blade 1, can suppress the pressure oscillation of the loudspeaker actinal surface that the turbulent flow by blade end eddy current 9 causes.In addition, can make blade 1 outer periphery 1c around wind path in circumferential homogenization, can suppress the change of the air-flow that flows into towards blade 1, obtain the little gas fan of noise.In addition, the axial upstream side of the second expansion section 5d from the upstream can be formed continuous shape smoothly to the zone of internal diameter minimum position Pb3, so, suppress the effect height of the turbulent flow of air-flow, can reduce noise with good efficiency.
In addition, in the second expansion section 5d of upstream, curvature is big near the first expansion section 5c of upstream, diminish in upstream side curvature more, probably become conic section in upstream portion, so the axial upstream side of the second expansion section 5d can obtain big opening area in the upstream, more air-flow can be guided to the space between outer periphery 1c and the horn mouth 5.Therefore, can obtain the gas fan of big air quantity, low noise.In addition, since have with the upstream second expansion section 5d continuously, form upstream the 3rd expansion section 5e of convex towards the running shaft updrift side, so, the air-flow that can flow into from flare end along the upstream the 3rd expansion section 5e as the little guide of flow of turbulent flow to blade 1.As a result, can obtain the littler gas fan of noise.
Below, the effect that feature produced by the position relation of the enlarged shape of the warpage of the outer periphery 1c of the blade 1 of the gas fan of present embodiment and horn mouth 5 is described.Near blade end eddy current 9 was grown up the maximum warpage that breaks away from, the change of eddy current also became greatly, so, the influence of the pressure oscillation on the horn mouth wall is also become big.Here, the upstream first expansion section 5c that makes horn mouth 5 and the transfer portion Pb4 of the upstream second expansion section 5d more are in running shaft direction downstream side than the maximum warpage position Pf3 of the outer periphery 1c of blade 1, so, near maximum warpage position Pf3, distance between the outer periphery 1c of blade 1 and the horn mouth 5 is big, therefore, can suppress the pressure oscillation of horn mouth wall.
In addition, the axial position of rotation of the maximum warpage position Pf3 of the outer periphery 1c of blade 1 is in the scope that is contained in the upstream second expansion section 5d, so, the air-flow around when blade end eddy current 9 breaks away from turbulent little, the turbulent flow of blade end eddy current 9 is also little.Its result also can suppress the noise that is caused by the blade end eddy current 9 that has broken away from.
Here, the axial position of rotation about the maximum warpage position Pf3 of the outer periphery 1c of blade 1, the shape that is in the scope that is contained in the upstream second expansion section 5d is illustrated, but the occasion that is contained in the scope of upstream the 3rd expansion section 5e also can obtain same effect.
Mode of execution 2
Fig. 7 and Fig. 8 represent embodiment of the present invention 2 heat pump system, be air conditioner, Fig. 7 is the front view (a) of the outdoor unit of the cuboid box of air conditioner and the horizontal cross that comprises running shaft (b) of looking sectional view as its C-C alignment, Fig. 8 is the figure of explanation from the direction of the wind path of running shaft observation, in Fig. 7, to the part mark same-sign identical with above-mentioned mode of execution 1.The explanation of gas fan is with reference to above-mentioned Fig. 1～Fig. 6.
The air conditioner of present embodiment, be that the outdoor unit 12 of cuboid box is provided with the face 13 that blows out in front, the suction face 14 of gas outside being provided with on 2 of a side on the left of its opposite (back side) and accompanying drawing, bend to L shaped heat exchanger 15 with the mode setting of sealing these suction faces 14, near configuration gas fan heat exchanger 15.This gas fan is made of the gas fan of above-mentioned mode of execution 1.In addition, heat exchanger 15 is provided with the fin of the multilayer shape of heat transfer usefulness at refrigeration agent at the outer surface of the pipe arrangement of inner loop, not necessarily leaves no choice but form L shaped, for example also can only be arranged on back side.In this occasion, the side that surrounds the face of blowing out 13 of casing is formed by a plurality of side plates.
In the running shaft direction downstream side of gas fan, dispose protection propeller fan 3 or protection people and wait the grid 16 not injured by the propeller fan 3 as solid of rotation.Blowing out face 13 and horn mouth 5 is surrounded around it by heat exchanger 15, top plate 17, lower panel 18 and separating plate 22.Separate with the compressor room 21 of accommodating compressor 20 wind path chamber 19 in the machine of accommodating gas fan in 22 pairs of outdoor units of separating plate 12.
The blade 1 of propeller fan 3 has the warpage of concavity towards sense of rotation 10 in its outer periphery 1c as Fig. 3 explanation.Surround the horn mouth 5 of the blade outer circumferential side integral body or the trailing edge side of propeller fan 3, here in that (i) shown in Figure 8～(either direction viii) is all as illustrated in fig. 4,, cover near the trailing edge 1b of outer periphery 1c to a Pb3 from a Pb2 with the narrowest and small internal diameter minimum 5b of portion of the distance of the outer periphery 1c of blade 1.In addition, has expansion section, the downstream 5a that enlarges wind path from a Pb2 to a Pb1 bending, to the running shaft downstream direction.The wind path enlarged shape of suction side direction (if see then to be the contracted flow shape from the flow direction of air-flow) has the upstream first expansion section 5c that forms convex to the running shaft updrift side from the end points Pb3 of the running shaft updrift side of the internal diameter minimum 5b of portion to a Pb4.Have from a Pb4 to a Pb5 with the upstream first expansion section 5c continuously, form the upstream second expansion section 5d of concavity to the running shaft updrift side.The second expansion section 5d in the upstream, curvature is big near a Pb4, and curvature diminishes near a Pb5, becomes roughly conic section near the some Pb5 as upstream portion.From a Pb5 to a Pb6, have with the upstream second expansion section 5d continuously, form upstream the 3rd expansion section 5e of convex to the running shaft updrift side.
Running shaft direction at propeller fan 3 and horn mouth 5, also as shown in Figure 4, the end points Pb3 of the running shaft updrift side of the internal diameter minimum 5b of portion of horn mouth 5 more is in running shaft direction upstream side than the trailing edge side end Pb2 of the outer periphery 1c of blade 1.The transfer portion Pb4 of upstream first expansion section 5c and the upstream second expansion section 5d more is in running shaft direction downstream side than the maximum warpage position Pf3 of the outer periphery 1c of blade 1.That is, the axial position of rotation of the maximum warpage position Pf3 of the outer periphery 1c of blade 1 is in the scope that is contained in the upstream second expansion section 5d.
Below, illustrate the present embodiment that constitutes like this air conditioner, be the action of outdoor unit 12.If the driving force by blower motor 7 makes propeller fan 3 rotations, then released to blowing out the side space beta from blowing out face 13, and machine is outward that the gas of suction side space alpha is in the machine that flow into propeller fan 3 rotations between the fin of suction face 14 by heat exchanger 15 in the wind path chamber 19 as the gases in the wind path chamber 19 in the machine in the zone of propeller fan 3 rotation.In heat exchanger 15 inside, the temperature higher temperature of the gas outer or the refrigerant cycle of low temperature more than machine, the gas outside machine carries out heat exchange during by heat exchanger 15.In flowing into machine during wind path chamber 19 and heat exchanger 15 carry out heat exchange and the gas that temperature risen or descended, the rotation by propeller fan 3 is blown out to outside the machine as described above.
About the action of the air-flow around the blade of propeller fan 3, identical with above-mentioned mode of execution 1.That is, flow into propeller fan 3 gas a part as shown in Figure 5 via the outside of outer periphery 1c, become the leakage current 8 that flows to suction surface 1e from pressure side 1d.With near the leakage current 8 that produces the leading edge of outer periphery 1c is that basic point produces blade end eddy current 9 in the position along outer periphery 1c of suction surface 1e, it is grown up along with shifting from front edge side towards the trailing edge side, and near the outer periphery 1c from blade 1 the maximum warpage position Pf3 that turns to the outer periphery 1c that becomes big that flows breaks away from.The blade end eddy current 9 that has broken away from from outer periphery 1c weakens the structure as eddy current on one side, by slave in wind path chamber 19 flowed to the mobile pushing of machine outer integral body on one side, gradually outside machine, emit from blowing out face 13.
Like this, the air conditioner of present embodiment constitutes the gas fan that being used in the outdoor unit 12 promotes the heat exchange of heat exchanger 15 by the gas fan of above-mentioned mode of execution 1, so the shape of the horn mouth 5 around the propeller fan 3 and propeller fan 3 have feature with the position relation of horn mouth 5.Therefore, same with above-mentioned mode of execution 1, can be taken into more air-flow from the outer periphery 1c of the blade 1 of gas fan, can suppress the pressure oscillation of 5 of horn mouths that the turbulent flow by blade end eddy current 9 causes.In addition, can be in the wind path homogenization on every side of the outer periphery 1c that circumferentially makes blade 1, inhibition flow into the change of the air-flow of blade 1, obtains the little gas fan of noise.
In addition, the axial upstream side of the second expansion section 5d from the upstream can be formed level and smooth continuous shape to the zone of internal diameter minimum position Pb3, so, suppress the effect height of the turbulent flow of air-flow, can reduce noise with good efficiencies.Particularly in the outdoor unit 12 of cuboid box, distance till the wind path end beyond the horn mouth seen from blade 15 for example at (i) of Fig. 8, (iii), (v), (direction vii) is narrow, (ii), (iv), (vi), (direction broad viii).In the outdoor unit of the maximum warpage position Pf3 in having used the outer periphery 1c that does not fully obtain blade 1 and the gas fan in the past of the distance between the horn mouth 5, the change that the inflow that is caused apart from change by the wind path based on the rotational position of blade 1 is flowed, the change of blade end eddy current 9 is big, but as present embodiment, gas fan has the shape of the such horn mouth 5 of maximum warpage position Pf3 portion among the outer periphery 1c that fully guarantees blade 1 and the distance between the horn mouth 5, according to the outdoor unit 12 that has used such gas fan, the change that the inflow of the wind path distance that the rotational position by blade 1 causes is flowed can be suppressed, big low noise effect can be obtained.
In addition, owing to can reduce the change of flowing at the rotational position place of blade 1,, can reduce the bearing wear of blower motor 7, the runout of axle so blower motor 7 also diminishes from the change of the power that propeller fan 3 is subjected to.Therefore, durability increases, and can obtain stay-in-grade outdoor unit 12 in long-term the use.
Mode of execution 3
In above-mentioned mode of execution 2, as heat pump system, is that example is illustrated with the horn mouth 5 around the propeller fan 3 at the air conditioner that circumferential integral body has upstream the 3rd expansion section 5e of upstream second expansion section 5d and upstream side thereof, but the upstream second expansion section 5d of horn mouth 5 and upstream the 3rd expansion section 5e of upstream side thereof, only be located at distance till the wind path end beyond the horn mouth of seeing from blade 15 in circumferential part jumpy, for example corresponding with the bight of the outdoor unit 12 of cuboid box part (to the long part of the distance of wind path end) also can reach the purpose at initial stage.Below, the heat pump system of the mode that the upstream portion that comprises the upstream second expansion section 5d circumferentially only partly being provided with of horn mouth 5 according to Fig. 9～Figure 11 explanation is such is the outdoor unit 12 of air conditioner.
Fig. 9 is the front view (a) of outdoor unit of the air conditioner of embodiment of the present invention 3, look the horizontal cross that comprises running shaft (b) of sectional view as its D-D alignment, and the E-E alignment that comprises its running shaft is looked sectional view (c), Figure 10 is the figure of explanation from the direction of the wind path of running shaft observation, Figure 11 is a local amplification view of wanting portion of observing horn mouth and propeller fan from the suction side, in each figure, to the part mark same-sign identical with above-mentioned mode of execution 1 and mode of execution 2.Here, when the explanation gas fan, with reference to above-mentioned Fig. 1～Fig. 6.
At the air conditioner of present embodiment, be in the outdoor unit 12 of cuboid box, the blade 1 of the propeller fan 3 of gas fan has the warpage (with reference to Fig. 3) of concavity towards sense of rotation 10 at its outer periphery 1c.The horn mouth 5 that surrounds blade outer circumferential side integral body or trailing edge side for propeller fan 3, at (i) shown in Figure 10, (iii), (the v), (part that vii) direction is extended, the i.e. short part of distance till the wind path end beyond the horn mouth of having seen from blade 15, like that, the first expansion section 5c (with reference to Fig. 4) stops the shape of the upstream side of horn mouth 5 to the upstream shown in Fig. 9 (b).On the other hand, surround bight that the direction in bight of the side of the face of blowing out 13 promptly is made of separating plate 22, top plate 17 and lower panel 18 (ii), (the vi), (horn mouth 5 of direction viii) in direction (iv) and the bight that constitutes by heat exchanger 15, lower panel 18 and top plate 17, as for example using Fig. 4 having illustrated in the mode of execution 1,, cover near the trailing edge 1b of outer periphery 1c to a Pb3 from a Pb2 with the narrowest internal diameter minimum 5b of portion of the distance of the outer periphery 1c of blade 1.Has expansion section, the downstream 5a that enlarges wind path from a Pb2 to the Pb1 bending, to the running shaft downstream direction.The wind path enlarged shape of suction side direction (being seen as the contracted flow shape from the flow direction of air-flow) has the upstream first expansion section 5c that forms convex to the running shaft updrift side from the some Pb3 of the end of the running shaft updrift side that becomes the internal diameter minimum 5b of portion to Pb4.Have from a Pb4 to a Pb5 with the upstream first expansion section 5c continuously, form the upstream second expansion section 5d of concavity to the running shaft updrift side.In the second expansion section 5d of upstream, curvature is big near a Pb4, and curvature diminishes near a Pb5, becomes conic section substantially near the some Pb5 as upstream portion.From a Pb5 to a Pb6, have with the upstream second expansion section 5d continuously, form upstream the 3rd expansion section 5e of convex to the running shaft updrift side.
At propeller fan 3 and (ii), (iv), (vi), (the running shaft direction of the horn mouth 5 of direction viii), also as having illustrated in the above-mentioned mode of execution 1, the end points Pb3 of the running shaft updrift side of the internal diameter minimum 5b of portion of horn mouth 5 more is in running shaft direction upstream side than the trailing edge side end Pb2 of the outer periphery 1c of blade 1.The transfer portion Pb4 of upstream first expansion section 5c and the upstream second expansion section 5d more is in running shaft direction downstream side than the maximum warpage position Pf3 of the outer periphery 1c of blade 1.The axial position of rotation of the maximum warpage position Pf3 of the outer periphery 1c of blade 1 is in the scope that is contained in the upstream second expansion section 5d.
Like this, be in the outdoor unit 12 at the air conditioner of present embodiment, also have feature aspect the shape of the horn mouth 5 around propeller fan 3 and the position relation of propeller fan 3 and horn mouth 5.Therefore, same with above-mentioned mode of execution 1,2, can be taken into many air-flows from the outer periphery 1c of the blade 1 of gas fan, can suppress the pressure oscillation of 5 of horn mouths that the turbulent flow by blade end eddy current 9 causes.
In addition, the axial upstream side of the second expansion section 5d from the upstream can be formed continuous shape smoothly to the part of internal diameter minimum position Pb3, so, suppress the effect height of the turbulent flow of air-flow, can reduce noise with good efficiency.Particularly in outdoor unit 12, distance till the wind path end beyond the horn mouth of having seen from blade 15 circumferential Fig. 8 jumpy (ii), (iv), (vi), (direction viii), upstream the 3rd expansion section 5e of upstream second expansion section 5d and upstream side thereof covers the blade periphery, so, can suppress the air-flow that flows into, the change of blade end eddy current 9 effectively, obtain the effect of low noise.
In addition, the change of flowing at the rotational position place of blade 1 can be reduced,, the bearing wear of blower motor 7, the runout of axle can be reduced so blower motor 7 also diminishes from the change of the power that propeller fan 3 is subjected to.Therefore, can obtain that durability increases, stay-in-grade outdoor unit 12 in long-term the use.
In addition, in the present embodiment, the upstream portion that comprises the upstream second expansion section 5d of horn mouth 5 circumferentially only partly exists outer periphery 1c's, so, the effect of change that suppresses air-flow, the blade end eddy current 9 of above-mentioned inflow, the occasion that exists in full week like that such as above-mentioned mode of execution 2 is little, but also can adopt the diameter of big propeller fan 3 as its alternative.In addition,, can reduce to be used to obtain the blower speed of needed air quantity by increasing the diameter of propeller fan 3, so, the low noise effect can be improved.In addition, can reduce to blow out, flow into the speed of the gas of grid 16 from propeller fan 3, so, can reduce to obtain the outdoor unit 12 of low noise thus from the noise of grid 16 generations.
In addition,, can reduce the flowing resistance of grid 16 by reducing speed by the gas of grid 16, so, can reduce necessary power, obtain the high outdoor unit 12 of energy-saving effect.In addition, the flowing resistance of grid 16 is little, can reduce the needed of propeller fan 3 and boost, and considers from this point, also can reduce the noise of propeller fan 3, obtains the more outdoor unit 12 of low noise.
In addition, as the Figure 11 that uses the cross section vertical with running shaft and represent, the circumferential two end part of the second expansion section 5d have the end warpage 23 as the curved surface that forms convex to the running shaft direction to horn mouth 5 in the upstream in the zone of the upstream second expansion section 5d.Like this, in the transfer portion of the part that circumferentially forms second expansion section 5d existence smoothly to non-existent part from the upstream, for example from (vii) direction to (viii) direction, from (viii) direction is to the transfer portion of (i) direction, also can suppress the change that causes of peeling off in above-mentioned transfer portion, obtain the low noise effect easily by the air-flow that flows into towards horn mouth 5.
Mode of execution 4
Figure 12 for the heat pump system of embodiment of the present invention 4, be the heat pump type hot water supply device the cuboid box outdoor unit front view (a), as its F-F alignment look section the horizontal sectional drawing that comprises running shaft (b), comprise the G-G alignment pseudosection (c) of its running shaft, in the drawings, in the part mark same-sign identical with above-mentioned mode of execution 1 and mode of execution 3.Here, explanation during gas fan also with reference to above-mentioned Fig. 1～Fig. 6.
Heat pump type hot water supply device in present embodiment is in the outdoor unit 25 of cuboid box, and gas fan is owing to having the structure identical with the gas fan of above-mentioned mode of execution 3, so omission illustrates, the structural discrepancy of main explanation and above-mentioned mode of execution 3.The heat pump type hot water supply device of present embodiment, be provided with the face of blowing out 13 in the front of outdoor unit 25 as shown in Figure 12,2 faces of one side in its opposite (back side) and accompanying drawing left side are provided with the suction face 14 of outer gas, bend to L shaped heat exchanger 15 with the mode setting of sealing these suction faces 14.In addition, the bottom of wind path chamber 19 is provided with the water heat source exchanger 24 that is used for carrying out heat exchange between refrigeration agent and water in machine.Water heat source exchanger 24 occupies the bottom of wind path chamber 19 in the machine, if observe from propeller fan 3 sides, the lower panel 18 of then above-mentioned mode of execution 3 becomes the form of the upper surface 24a that is replaced as water heat source exchanger 24, the effect that obtains by gas fan that in mode of execution 3, has illustrated, in the outdoor unit 25 of the heat pump type hot water supply device of present embodiment, also can similarly obtain, can obtain low noise and keep the outdoor unit 25 of quality for a long time.
Mode of execution 5
The feature that the gas fan of present embodiment has illustrated in above-mentioned mode of execution 1, also have make blade 1 the outer periphery side from blowing out the feature of side (β) (α) warpage towards the suction side.At first, illustrate and make blade outer periphery side from blowing out the shape of side towards the suction side warpage.Feature, the propeller fan 3 of the horn mouth 5 beyond the blade shape are identical with mode of execution 1 with the relative position of horn mouth 5, the formation of blower motor 7 etc.Therefore, here, when the explanation gas fan, also with reference to above-mentioned Fig. 1～Fig. 6.
Figure 13 is suitable with the above-mentioned Fig. 4 portion's enlarged view of wanting of the gas fan of embodiment of the present invention 5, dotted line Ld1～Ld11 is for to being that the radiation direction cross section of the blade at center is waited and cut apart with the running shaft, with the line that is connected to the outer periphery side from the propeller boss side is that rotating shaft center makes the point of division rotation, be projected in the meridian line of cutting apart in the plane that comprises running shaft, half more is in the part of outer periphery side than it in expression.In the drawings, the part from the leading edge to the trailing edge is divided into 12 parts.At the blade outer periphery side Lf4 that draws,, cut apart meridianal outer periphery side from blowing out side (the blowing out the space beta side) warpage that (sucks the space alpha side) towards the suction side in the front and back of Lf4.In the warpage mode shown in this figure, from being near the centre from the leading edge to the trailing edge Ld5 to Ld7, amount of warpage is big, from this to leading edge, trailing edge, amount of warpage diminishes gradually, is becoming leading edge 1a, trailing edge 1b (representing as meridian line in Figure 13) warpage not of cutting apart meridianal end.
Below, illustrate carried make like this blade outer periphery side towards the suction side warpage the action of gas fan of propeller fan 3 of present embodiment.As described above, if the driving force by blower motor 7 makes propeller fan 3 rotations, then the gas in the zone of propeller fan 3 rotations is pushed out into and blows out the side space beta, simultaneously, the face that constitutes from the rotating locus by blade inlet edge 1a of the gas of suction side space alpha, the face that is made of the rotating locus of the outer periphery 1c of blade 1 flow into the zone of propeller fan 3 rotations.
Figure 14 is for similarly being launched into the plane with the blade outer periphery with above-mentioned Fig. 5, having added near the figure of line of the state of the air-flow the expression outer periphery.A part that has flow into the gas of propeller fan 3 becomes the leakage current 8 that flows to suction surface 1e via the outside of outer periphery 1c from pressure side 1d as shown in Figure 14.In the present embodiment, make blade outer periphery side direction suction side warpage, so the pressure side 1d at outer periphery 1c place and the pressure reduction of suction surface 1e diminish, simultaneously, the leakage current 8 that flow into suction surface 1e from pressure side 1d becomes level and smooth.Therefore, be the center pressure that basic point is created in suction surface 1e with near the leakage current 8 that the leading edge of outer periphery 1c, has produced along the blade end eddy current 9 of the position of outer periphery 1c, than the occasion height that does not make outer periphery side direction suction side warpage, become weak eddy current as eddy current.
Blade end eddy current 9 is grown up along with shifting from leading edge 1a side towards trailing edge 1b side, and near the outer periphery 1c from blade 1 the maximum warpage position Pf3 that turns to the outer periphery 1c that becomes big that flows breaks away from.The blade end eddy current 9 that has broken away from from outer periphery 1c weakens the structure as eddy current on one side, from suction side space alpha flowed to the mobile pushing of the integral body that blows out side space beta on one side, simultaneously, flow to gradually and blow out the side space beta, emit from gas fan.
The eddy current that breaks away from from outer periphery 1c is except interfering with the blade of horn mouth 5 and adjacency and becoming the noise source, also become obstruction blows out the side space beta from suction side space alpha court the resistance that flows, in order to obtain needed air quantity, pressure, need to improve blower speed, noise increases.By as present embodiment, making blade outer periphery side direction upstream side warpage, can weaken blade end eddy current 9, can suppress increase by the noise of blade end eddy current 9 generations.
Yet, although make blade outer periphery side towards blade end eddy current 9 center pressures of the occasion of suction side warpage than higher, die down as eddy current, but become the unsettled eddy current that eddy current position, vortex diameters change easily.Therefore, in the horn mouth in the past 25 that first expansion section, upstream is only arranged as shown in Figure 15, can not fully obtain its effect.Such as already described, in the use of the gas fan of reality, in the space alpha of suction side blade 1 around non-constant width and become in the occasion of circumferential uniform shape very rare.In the occasion of the little horn mouth 24 in the first such expansion section of representing with solid line, the influence of the change around being subjected to easily, weak and unsettled blade end eddy current 9 is more unstable, becomes the reason that upsets the flow field, causes noise.In addition, occasion at the big horn mouth 25 in the first such expansion section of representing with a dot and dash line, the influence of the change around the outer periphery obtains relaxing, but owing to make the inflow wind path stenosis that begins from outer periphery 1c narrow, therefore the inflow from the gas of outer periphery 1c reduces in the position of more past running shaft direction upstream side, and the leakage current 8 that flows to suction surface 1e from pressure side 1d also reduces simultaneously.Therefore, the growth of blade end eddy current 9 zone is short, has been useful in the occasion of such gas fan in the technology that will of the present inventionly make outer periphery 1c side direction upstream side warpage, and blade end eddy current 9 dies down, and makes thus also to become morning from the disengaging of blade.As a result, take place easily, exist the zone of upsetting the flow field to broaden and wait the reason that makes the noise deterioration with the interference of the blade of horn mouth and adjacency.Like this, towards the occasion that the propeller fan of suction side warpage and in the past horn mouth have made up, can not fully obtain the low noise effect in the outer periphery that will make blade in the past.
In the gas fan of present embodiment, as dotting among Figure 15, have with first expansion section, upstream that forms convex to the running shaft updrift side continuously, form the upstream second expansion section 5d of concavity to the running shaft updrift side, so, as as can be seen from the figure, compare the horn mouth shape of representing with solid line, a dot and dash line in the past, more can surround the outer periphery 1c of blade 1, obtain the outer periphery 1c of big blade 1 and the distance between the horn mouth 5.Like this, the outer periphery 1c wind path on every side that can make blade 1 can suppress can suppress the instabilityization of blade end eddy current towards the change of the air-flow of blade 1 inflow in circumferential homogenization, and can be taken into many air-flows from the outer periphery 1c of blade 1, can suppress the disengaging of blade end eddy current 9.As a result, of the low noise effect of the outer periphery side of blade 1 can be obtained to make effectively, the gas fan of low noise can be obtained towards the propeller fan 3 of suction side warpage.
From blowing out side towards the warpage mode of suction side warpage, big near the centre from leading edge 1a to trailing edge 1b in outer periphery side shown in Figure 13, diminish gradually to trailing edge 1b amount of warpage, becoming the trailing edge 1b warpage not of cutting apart meridianal end.Like this, make from the inflow of the gas of the outer periphery 1c of blade 1 by horn mouth 5 and to tail off, the trailing edge 1b side that leakage current 8 in the generation that becomes blade end eddy current 9, growth source tails off, by reducing to blow out the warpage of side towards the suction side from the outer periphery side, can obtain big steering angle in the big outer periphery side of peripheral speed, improve boosting of blade effectively.As a result, the rotating speed of needed air quantity, pressure can be reduced to obtain, the relative velocity of the air-flow on the blade face can be reduced.Air-flow relative velocity on the blade face descends and means that the pressure oscillation that becomes the noise reason descends, and can obtain the gas fan of low noise.
Mode of execution 6
Here, use Fig. 7 and Fig. 8 that for example air conditioner of heat pump system is described, this heat pump system has gas fan, the blade outer periphery side that this gas fan makes propeller fan 3 is from blowing out side towards the suction side warpage, and from the upstream first expansion section 5c of horn mouth 5 continuously at its upstream side circumferentially have the upstream second expansion section 5d full week.Above-mentioned Fig. 1～Fig. 6 of reference in the explanation of gas fan.
The structure, action of air conditioner of gas fan that has been suitable for present embodiment is identical with above-mentioned mode of execution 2, can obtain the effect that mode of execution 2 is had equally.The part of the outer periphery side that makes blade 1 of propeller fan 3 towards the suction side warpage mainly is described here.
In the occasion of in the past bell-mouth construction, for example such as already described, even adopt the form of the outer periphery side of the blade 1 that makes propeller fan 3, can not obtain its effect fully towards the suction side warpage.Particularly in the occasion that is equipped on heat pump systeies such as air conditioner, the circumferential uniformity of the wind path around the blade outer periphery is low, is difficult to obtain to make the low noise effect of blade outer periphery side towards the occasion of suction side warpage in horn mouth structure in the past.
In the air conditioner of present embodiment, horn mouth from the upstream first expansion section continuously at its upstream side circumferentially entirely have second expansion section, upstream week, and the outer periphery side of blade 1 that makes propeller fan 3 is towards the suction side warpage, so, can suppress the influence of the nonuniformity of outer periphery wind path on every side, guarantee that gas flows into from outer periphery 1c, and can weaken blade end eddy current 9, obtain the low noise effect.Therefore, can obtain the heat pump system of low noise.
Mode of execution 7
Here, for example air conditioner of heat pump system is described, the blade outer periphery side that this heat pump system makes propeller fan 3 is from blowing out side towards the suction side warpage, and from the upstream first expansion section 5c of horn mouth 5 continuously at its upstream side circumferentially partly have the upstream second expansion section 5d.When the explanation gas fan, with reference to above-mentioned Fig. 1～Fig. 6.
The mode of execution 3 that structure, action and use above-mentioned Figure 10 and Figure 11 of air conditioner of being suitable for the gas fan of present embodiment illustrated is identical, can similarly obtain the effect that mode of execution 3 is had.Here, the main part that the outer periphery side of the blade 1 that makes propeller fan 3 is described towards the suction side warpage.
For example such as already described, in the occasion of in the past horn mouth structure,, can not obtain its effect fully even adopt the mode of the outer periphery side of the blade 1 that makes propeller fan 3 towards the suction side warpage.Particularly in the occasion that is equipped on heat pump systeies such as air conditioner, the circumferential uniformity of the wind path around the blade outer periphery is low, the face around the big occasion of the external diameter of blower and the distance of blade become near, are difficult to obtain to make the low noise effect of blade outer periphery towards the occasion of suction side warpage.
In the air conditioner of present embodiment, horn mouth from the upstream the first expansion section 5c continuously at its upstream side have the upstream second expansion section 5d, and the distance that this upstream second expansion section 5d is located at the face in the fuselage of blade and side is seen from the blade of rotation and is changed big part, so, can suppress the influence of the nonuniformity of outer periphery wind path on every side effectively, guarantee that gas flows into from outer periphery 1c, and can weaken blade end eddy current 9, obtain the low noise effect.Therefore, can obtain the heat pump system of low noise.
Figure 16 and Figure 17 have made up the result's that more such occasions test the relation of air quantity and aerodynamic force noise level chart for expression, this occasion is the outer periphery side of the blade 1 that has and do not exist propeller fan 3 in the outdoor unit of the air conditioner occasion towards the warpage of suction side, the upstream side of bight in first expansion section, horn mouth upstream that is made of separating plate and top plate, lower panel in outdoor unit is provided with the occasion of second expansion section, upstream, and bell-mouthed occasion in the past.In Figure 16 and Figure 17, make the shape difference of the outer periphery side warpage of blade 1.Here, the blade shape that will test in Figure 16 is called propeller fan A, and the blade shape that will test in Figure 17 is called propeller fan B.
Below, specifically describe the warpage mode of propeller fan A, propeller fan B.Figure 18 and above-mentioned Figure 13 similarly represent to cut apart meridian line.If cutting apart the angle of difference of the front and back of meridianal tilt variation is θ, in propeller fan A, the central authorities from leading edge 1a to trailing edge 1b cut apart meridian line be the θ of cutting apart meridian line Ld6 of Figure 18 for maximum, be made as about 14 degree.In propeller fan B, than the more past leading edge 1a side of central authorities cut apart meridian line be the θ of cutting apart meridian line Ld4 place of Figure 18 for maximum, be made as about 14 degree.The radial location that becomes the basic point of cutting apart meridianal tilt variation all is made as 85% radius in periphery footpath.The maximum value of θ (about 14 degree) obtains from multiple test result, and the maximum value of θ is preferably about 14 degree.Figure 19 is the unfolded drawing of the outer periphery of blade 1, and the length of the blade string of a musical instrument is made as L, and the ultimate range of the blade string of a musical instrument and blade is made as D, is defined as warpage ratio=D/L.Making warpage is 5.8% than in the position of radius ratio 85%, increases to 8.7% in the periphery radial location, thereby realizes cutting apart meridianal inclination.
Which occasion of Figure 16 and Figure 17 can be learnt, in the occasion of the outer periphery side direction suction side warpage that does not make blade, compares horn mouth in the past, by second expansion section, upstream is set, can reduce the noise of outdoor unit.In the occasion of the outer periphery that make blade, in horn mouth in the past, can not reduce the noise of outdoor unit basically, but, can reduce the noise of outdoor unit significantly by second expansion section, upstream is set to the suction side warpage.
The possibility of utilizing on the industry
Application Example as pressure fan of the present invention, enumerated the off-premises station 12 of air conditioner, the off-premises station 25 of heat pump type water heater is illustrated for example, but also can be widely used in addition the various devices (for example, ventilation fan) that are provided with pressure fan, equipment etc.
Claims (17)
1. a gas fan has blade and horn mouth, and this blade has the outer periphery that form the concavity warpage to sense of rotation, and what this horn mouth covered this blade blows out the side periphery; It is characterized in that:
Above-mentioned bell-mouthed blade side comprises first expansion section, upstream and second expansion section, upstream;
This first expansion section, upstream from the internal diameter minimum position upstream side extend, and form convex to the running shaft updrift side;
This second expansion section, upstream is further side extension upstream continuously from first expansion section, above-mentioned upstream, and forms concavity to the running shaft updrift side.
2. gas fan according to claim 1 is characterized in that: the upstream portion of second expansion section, above-mentioned upstream roughly forms taper shape.
3. gas fan according to claim 1 and 2 is characterized in that: the transfer portion from first expansion section, above-mentioned upstream to second expansion section, above-mentioned upstream, the maximum warpage position of comparing the outer periphery of above-mentioned blade is in the downstream side.
4. according to any one described gas fan in the claim 1～3, it is characterized in that: have the 3rd expansion section, upstream, this the 3rd expansion section, upstream is further side extension upstream continuously from second expansion section, above-mentioned upstream, forms convex to the running shaft updrift side.
5. gas fan according to claim 4 is characterized in that: second expansion section, above-mentioned upstream or the 3rd expansion section, above-mentioned upstream cover the maximum warpage part of the outer periphery of above-mentioned blade.
6. according to any one described gas fan in the claim 1～5, it is characterized in that: the outer periphery side of blade that makes propeller fan is from blowing out side direction suction side warpage.
7. gas fan according to claim 6, it is characterized in that: the outer periphery side of blade that makes propeller fan is from blowing out such shape that is shaped as of side direction suction side warpage, that is, from be in leading edge near the position the centre of trailing edge to trailing edge, amount of warpage reduces gradually.
8. heat pump system is characterized in that: have upper surface or the side of being located at casing and the air that disposes gas fan and blow out face, be located at least the heat exchanger on other the face and surround a plurality of side plates or the heat exchanger of other face;
Above-mentioned gas fan has blade and horn mouth, and this blade has the outer periphery that form the concavity warpage to sense of rotation, and what this horn mouth covered this blade blows out the side periphery;
Above-mentioned bell-mouthed blade side comprises first expansion section, upstream and second expansion section, upstream;
This first expansion section, upstream be formed on from the internal diameter minimum position on full week mode upstream side extend, and form convex to the running shaft updrift side;
This second expansion section, upstream is formed on full week continuously from first expansion section, above-mentioned upstream, and further side extension upstream, forms concavity to the running shaft updrift side.
9. heat pump system according to claim 8 is characterized in that: above-mentioned gas fan is any one described gas fan in the claim 2～7.
10. it is characterized in that according to Claim 8 or 9 described heat pump systeies: the outer periphery side of blade that makes propeller fan is from blowing out side direction suction side warpage.
11. a heat pump system is characterized in that: have upper surface or the side of being located at casing and the air that disposes gas fan and blow out face, be located at least the heat exchanger on other the face and surround a plurality of side plates or the heat exchanger of other face;
Above-mentioned gas fan has blade and horn mouth, and this blade has the outer periphery that form the concavity warpage to sense of rotation, and what this horn mouth covered this blade blows out the side periphery;
Above-mentioned bell-mouthed blade side comprises first expansion section, upstream and second expansion section, upstream;
This first expansion section, upstream be formed on from the internal diameter minimum position on full week mode upstream side extend, and form convex to the running shaft updrift side;
This second expansion section, upstream is formed on the part in full week continuously from first expansion section, above-mentioned upstream, and further side extension upstream, forms concavity to the running shaft updrift side.
12. heat pump system according to claim 11 is characterized in that: above-mentioned gas fan is any one described gas fan in the claim 2～7.
13. according to claim 11 or 12 described heat pump systeies, it is characterized in that: the circumferential two end part in second expansion section, above-mentioned bell-mouthed above-mentioned upstream have the curved surface that forms convex to the running shaft direction.
14. according to any one described heat pump system in the claim 11～13, it is characterized in that: above-mentioned bell-mouthed existence is the circumferential position of side second expansion section, above-mentioned upstream of extending upstream partly from first expansion section, above-mentioned upstream, for blowing out the corresponding position, bight of the side of face with the above-mentioned air of surrounding of above-mentioned casing.
15. heat pump system according to claim 14 is characterized in that: the side that surrounds the face of blowing out of above-mentioned casing is made of a plurality of side plates.
16. heat pump system according to claim 14 is characterized in that: the side that surrounds the face of blowing out of above-mentioned casing is made of a plurality of side plates and heat exchanger.
17. according to any one described heat pump system in the claim 11～16, it is characterized in that: the outer periphery side of blade that makes propeller fan is from blowing out side direction suction side warpage.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008111585 | 2008-04-22 | ||
| JP2008-111585 | 2008-04-22 | ||
| JP2008228399 | 2008-09-05 | ||
| JP2008-228399 | 2008-09-05 | ||
| PCT/JP2009/054645 WO2009130954A1 (en) | 2008-04-22 | 2009-03-11 | Blower and heat pump device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102016327A true CN102016327A (en) | 2011-04-13 |
| CN102016327B CN102016327B (en) | 2016-11-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105102822A (en) * | 2013-04-04 | 2015-11-25 | 三菱电机株式会社 | Propeller fan, blower device, and outdoor equipment |
| CN105579780A (en) * | 2013-09-27 | 2016-05-11 | 三菱电机株式会社 | Heat pump water heater |
| CN114599919A (en) * | 2019-10-29 | 2022-06-07 | 三菱电机株式会社 | Outdoor unit of air conditioner |
| CN114922829A (en) * | 2018-07-12 | 2022-08-19 | 株式会社电装 | Centrifugal blower |
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| US20020076327A1 (en) * | 2000-06-16 | 2002-06-20 | Houten Robert Van | Automotive fan assembly with flared shroud and fan with conforming blade tips |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105102822A (en) * | 2013-04-04 | 2015-11-25 | 三菱电机株式会社 | Propeller fan, blower device, and outdoor equipment |
| CN105579780A (en) * | 2013-09-27 | 2016-05-11 | 三菱电机株式会社 | Heat pump water heater |
| CN105579780B (en) * | 2013-09-27 | 2018-07-17 | 三菱电机株式会社 | Heat-pump hot water supply apparatus |
| CN114922829A (en) * | 2018-07-12 | 2022-08-19 | 株式会社电装 | Centrifugal blower |
| CN114922829B (en) * | 2018-07-12 | 2024-06-07 | 株式会社电装 | Centrifugal blower |
| CN114599919A (en) * | 2019-10-29 | 2022-06-07 | 三菱电机株式会社 | Outdoor unit of air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2702364T3 (en) | 2019-02-28 |
| US20110017427A1 (en) | 2011-01-27 |
| EP2270338B1 (en) | 2018-11-14 |
| JP5213953B2 (en) | 2013-06-19 |
| EP2270338A4 (en) | 2014-10-01 |
| WO2009130954A1 (en) | 2009-10-29 |
| JPWO2009130954A1 (en) | 2011-08-18 |
| EP2270338A1 (en) | 2011-01-05 |
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