CN1699757A - Fan for condenser for refrigerator - Google Patents

Fan for condenser for refrigerator Download PDF

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Publication number
CN1699757A
CN1699757A CNA2005100626961A CN200510062696A CN1699757A CN 1699757 A CN1699757 A CN 1699757A CN A2005100626961 A CNA2005100626961 A CN A2005100626961A CN 200510062696 A CN200510062696 A CN 200510062696A CN 1699757 A CN1699757 A CN 1699757A
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CN
China
Prior art keywords
axial fan
blade
condenser
wheel hub
fan
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Pending
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CNA2005100626961A
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Chinese (zh)
Inventor
郑容奎
金昌俊
白丞祚
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LG Electronics Inc
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LG Electronics Inc
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Publication of CN1699757A publication Critical patent/CN1699757A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to an axial flow fan for condenser in a refrigerator for enhancing efficiency and lowering noise, in which the number of blades is three, the diameter of a hub is 23.3+-5% of the outside diameter of the axial flow fan and the width of each of the blades is 36.6+-3% of the outside diameter of the axial flow fan.

Description

The fan of condenser for refrigerator
Invention field
The present invention relates to refrigerator, more specifically, relate to the condenser axial fan that reduces pneumatic noise in the refrigerator.
Background technique
Usually, being used for freezing and refrigerator chilled food comprises: the housing with the holding space that is made of refrigerating chamber and cold storage room; Be installed in last chamber door and following chamber door that housing one side is used for ON/OFF refrigerating chamber and cold storage room; And comprise that execution such as compressor, condenser and vaporizer are used to cool off the equipment of the cool cycles of refrigerating chamber and cold storage room.
In this refrigerator, utilize compressor with low temperature and low-pressure refrigerant gas boil down to high-temperature high-pressure state.The gas refrigerant of compressed High Temperature High Pressure is colded pressing by condenser the time is condensed to highly pressurised liquid.High-pressure refrigerant is by capillary tube the time, and its temperature and pressure reduces, and in the gas that is converted into low temperature and low pressure, the absorption heat cools off the surrounding atmosphere in the vaporizer from environment subsequently.Utilize the cool air of evaporator cools under the effect of blowing fan, to circulate and enter refrigerating chamber and cold storage room, so that reduce the temperature of cold storage room and refrigerating chamber.
In refrigerator shown in Figure 1, condenser 10 and compressor 12 are installed in the space of a so-called machine chamber that is positioned at the hull outside bottom; A blowing fan components is installed in the one side, be used for suck up outside air to enter machine chamber and it is blowed to condenser 10, thereby cooling is directed to refrigeration agent in the condenser 10 effectively.
As shown in Figure 2, blowing fan components comprises the motor 22 of an axial fan 20 and a live axle flow fan 20, wherein axial fan 20 comprises a wheel hub 201 on the running shaft that is connected to motor 22, and has a plurality of blades 202 that are arranged on wheel hub 201 peripheries.
According to this blowing fan components, axial fan 20 rotates by the work of motor 22, causes producing pressure difference between blade 202 front surfaces and rear surface.This pressure difference causes outside air to flow in the machine chamber and blows to condenser 10.
Determine the example of the characteristic factor of these class axial fan 20 air blast performances to comprise: the number of sweepback angle, maximum immunity value, blade 202 and similar factor.As shown in Figure 2, the sweepback angle represents by Y-axis and an angle α who constitutes by the straight line at blade 202 inboard centers and wheel hub 201 centers, and wherein Y-axis is the straight line that a center by blade 202 inboard centers or the blade-section that contacts with wheel hub 201 is connected to blade outer side center or blade summit.
And shown in Fig. 2 B, maximum immunity value p represents to connect leading edge L.E and the string of trailing edge T.E and the perpendicular distance between the P of maximum deflection position of blade 202.
At this moment, sweepback angle α is a factor of decision axial fan 20 air flows noises.Sweepback angle α numerical value is big, then is increased in the phase difference of the air-flow between wheel hub 201 and blade 202 summits.Sweepback angle α numerical value is little, then reduces the phase difference of air-flow.
For example, compare two axial fans with similar number blade and air output.As shown in Figure 3A, have the blade at 30 ° of sweepback angle, allow air stream when blade rotates about 23 °, to pass through blade.Shown in Fig. 3 B, have the blade at 60 ° of sweepback angle, allow air stream when blade rotates about 49 °, to pass through blade.
In other words,, have 23 ° phase difference, have 49 ° phase difference by the blade of blade the inner by the air stream on blade outer end or summit according to above-mentioned sweepback angle α.
Therefore, this air stream phase difference causes noise and the phase difference between the noise of blade 202 the inners in blade 202 outer ends.Wherein, when this phase difference increased, the frequency that air communication is crossed blade reduced.
Maximum immunity value p is decision factor of pressure difference between blade 202 upper surfaces and lower surface, wherein the increase of maximum immunity value p has increased the pressure difference between blade upper surface and lower surface, thereby has increased the frequency that air communication is crossed blade.
Simultaneously, according to the structure of machine chamber, even some is low and when not high, the axial fan 20 that design has low noise also is effective for the air-supply stream pressure with simple channel and small channel Resistance Value., the axial fan 20 that is used for traditional blowing fan components has such structure, and the space between blade 202 is narrow, and sweepback angle α is little, and deflection value is big, and the number of blade 202 is three.
Because the narrow space between blade 202 forces blade 202 sizes big, therefore the air stream that produces on blade 202 surfaces can have big dissection scope and big pressure surge scope, and this is the reason that increases pneumatic noise.And sweepback angle α is little, and maximum immunity value p is big, and the result is because the above-mentioned characteristic of sweepback angle and maximum immunity value causes pneumatic noise to increase.
Therefore, the condenser axial flow fan in the refrigerator of prior art has big pneumatic noise.Like this, the problem of existence is the performance that has reduced refrigerator.
Summary of the invention
Therefore, the present invention designs the problems referred to above that solve prior art.Therefore, an object of the present invention is to provide a kind of axial fan of condenser for refrigerator, this axial fan comprises three blades.Wherein, the diameter of wheel hub is 23.3 ± 5% of an axial fan external diameter, and the width of each blade is 36.6 ± 3% of an axial fan external diameter.
In order to reach above-mentioned purpose of the present invention, supply a kind of axial fan of condenser for refrigerator here, this axial fan comprises three blades.Wherein, internal diameter is 23.0 ± 5% with the ratio of external diameter; The maximum deflection position is 0.65, evenly distributes to the blade summit from wheel hub; And maximum deflection have from wheel hub to the maximum deflection position from 4.0% to 5.0% and from the maximum deflection position from 5.0% to 6.0% curve distribution (curved distribution) to the limit.
The accompanying drawing simple declaration
Fig. 1 is a three-dimensional view, the machine chamber structure of expression common refrigerator;
Fig. 2 A and Fig. 2 B are respectively the front view and the side views of the characteristic factor of the expression axial fan that constitutes common blowing fan components;
Fig. 3 A and Fig. 3 B are respectively the plotted curves of the air stream phase difference that changes according to the sweepback angle in the characteristic factor of axial fan of expression;
Fig. 4 A and Fig. 4 B are respectively front view and the side view of expression according to the characteristic factor of the axial fan that is used for condenser of the present invention;
Fig. 5 is that the expression noise is along with the plotted curve that changes according to the lobe numbers in the characteristic factor of axial fan of the present invention;
Fig. 6 is that the expression noise is along with the plotted curve that changes according to the width of blade in the characteristic factor of axial fan of the present invention;
Fig. 7 is a plotted curve, and expression is according to axial fan of the present invention with according to the noise spectrum of the axial fan of prior art;
Fig. 8 is a plotted curve, and the noise of representing axial fan of the present invention is along with pitching angle changes and the curve of variation;
Fig. 9 is a plotted curve, and the noise of representing axial fan of the present invention is along with the sweepback angle changes and the curve of variation;
Figure 10 be one according to the sectional view that is used for the axial fan of refrigerator of the present invention, in order to illustrate, wherein the border of blade is divided into 160 zone bits.
Figure 11 is a plotted curve, contrasts axial fan of the present invention and according to the noise variation of the axial fan of prior art.
Embodiment
Describe the present invention with reference to the accompanying drawings in detail.
A kind of axial fan of condenser for refrigerator is provided in order to achieve the above object.It is characterized in that comprising three blades, the diameter of wheel hub is 23.3 ± 5% of an axial fan external diameter, and the width of each blade is 36.6 ± 3% of an axial fan external diameter.
Axial fan of the present invention is characterised in that the external diameter of axial fan is 150 ± 1mm, and hub diameter is 35 ± 1mm, and width of blade is 55 ± 1mm.
And axial fan of the present invention is characterised in that, each blade have from wheel hub to the blade summit equally distributed 0.65 maximum deflection position.Wherein, maximum deflection has from wheel hub and is 4.0% to 5.0% to the maximum deflection position and is 5.0% to 6.0% curve distribution to the limit from the maximum deflection position.Each blade have from wheel hub to the limit linear distribution, size is 36.0 ° to 26.0 ° pitching angle, and to have a size be 67.0 ° ± 5% sweepback angle.
Describe the first embodiment of the present invention below with reference to Fig. 4 in detail to Fig. 7, wherein the similar part profit of the present invention and prior art is denoted by like references.
At first, the axial fan that is used for condenser for refrigerator according to first embodiment of the invention has three blades 202 like that shown in Fig. 4 A, wherein shown in Fig. 4 B, the diameter of wheel hub is 23.3 ± 5% of an axial fan outer diameter D, and the width b of each blade is 36.6 ± 3% of an axial fan outer diameter D.
At this moment, consider the volume of machine chamber, the diameter d of preferred axes flow fan outer diameter D, wheel hub and the width b of blade have the size that satisfies such as the aforementioned proportion of 150 ± 1mm, 35 ± 1mm and 55 ± 1mm respectively.
The selection of these sizes is result of experiment, in order to compare the asynchronous pneumatic noise of lobe numbers, makes axial fan have 3,5,7,9 blades in the experiment.As shown in Figure 5, when axial fan had 3 or 7 blades, axial fan had minimum pneumatic noise.
And, relatively having the fan of 3 blades and have the fan of 7 blades, the fan speed increase of finding to have three blades is more steady and make more conveniently, and it is in performance with more outstanding on creating conditions like this.
Width of blade b also is the key factor of decision noise of (for example in the machine chamber of refrigerator) in the airtight passage of axial fan axial flow direction.And, as shown in Figure 6, can find, be 36.6% o'clock at the width b of blade and the ratio of axial fan outer diameter D, pneumatic noise has minimum value.
And according to the first embodiment of the present invention, axial fan has such structure, each blade 202 have from wheel hub 201 to the blade summit equally distributed 0.65 maximum deflection position P; Maximum deflection MC shows from wheel hub 201 to maximum deflection position P to be 4.0% to 5.0% and to be 5.0% to 6.0% curve distribution to the limit from maximum deflection position P; Show as from wheel hub 201 be to the limit linear distribution, size is 36.0 ° to 26.0 ° pitching angle β; And a size is 67.0 ° ± 5% sweepback angle.
Therefore, according to the first embodiment of the present invention, as shown in Figure 7, under the flow conditions identical with conventional axial-flow fan, fan increases the rotational speed of 50rpm, and noise reduces 2dB.
The blowing fan that is used for condenser for refrigerator according to the present invention described above, because such as the number of blade and maximum deflection and with respect to the characteristic factors such as width of blade of axial fan external diameter, therefore air blast noise and the frequency by blade reduce, thereby have improved the performance of refrigerator.
Detailed description hereinafter is with reference to accompanying drawing and following table, and the axial fan of the refrigerator of the second embodiment of the present invention is described.
As shown in Figure 5, can find that when air output was identical, the noise of axial fan was inversely proportional to the number of blade.This means that the increase of lobe numbers as the greatest factor that overcomes channel resistance is the greatest factor that increases noise in the air-supply process.
Therefore, consider the factor of noise,, just preferably make axial fan have less blade quantity as long as throughput does not reduce in a large number.
Fig. 8 is a plotted curve, and noise is along with pitching angle changes and the curve of variation in the expression axial fan.This is the result who experimentizes for the axial fan with three blades on the basis of Fig. 5.Wherein vertical shaft is represented sound pressure, and horizontal axis is represented pitching angle.
Pitching angle shown in Figure 8 is the numerical value on the blade summit, and wherein noise is inversely proportional to the increase of pitching angle, and is proportional to the increase of pitching angle after pitching angle surpasses certain limit.Here, when pitching angle is 20 ° to 25 °, has minimum level of noise.
Fig. 9 is a plotted curve, and the noise of expression axial fan is along with the sweepback angle changes and the curve of variation.Wherein vertical shaft is represented sound pressure, and horizontal axis is illustrated in the sweepback angle on blade summit.
The inclined degree of blade in sense of rotation represented at the sweepback angle, it be by connect wheel hub to the blade center and the imaginary line from the blade summit to the center and a straight line perpendicular to angle of rotation limit.According to a function, the sweepback angle that is used to reduce fan noise is 0 at the numerical value of wheel hub, is particular value on the blade summit.
As shown in Figure 9, as can be seen, has minimum noise when being 69 ° to 72 ° at the sweepback angle.
Simultaneously, the following describes the best use in refrigerator axial fan of second embodiment of the invention, can be according to noise along with above-mentioned Changing Pattern such as factors such as lobe numbers, pitching angle and sweepback angle, make noise minimization.
At first, shown in Fig. 4 A and 4B, comprise: the wheel hub 201 on running shaft that is connected to motor according to the use in refrigerator axial fan 20 of second embodiment of the invention; With along radial arrangement on the excircle of wheel hub, be used for by the rotation blow air 3 blades 202.
Each blade 202 is elements of introducing air stream, and the three-D profile of each blade is by the Several Factors decision of decision axial fan air-supply characteristic.
According to the second embodiment of the present invention, the diameter d of wheel hub is 23.3 ± 5% of an axial fan outer diameter D, and wherein the outer diameter D of axial fan is 110 ± 1mm, and hub diameter d is 25 ± 1mm, and width of blade b is 36.0 ± 1mm.
According to the second embodiment of the present invention, the maximum deflection position P of axial fan 20 is 0.65, evenly distributes to the blade summit from wheel hub 201.Maximum deflection MC has from wheel hub 201 to maximum deflection position P to be 4.0% to 5.0% and to be 5.0% to 6.0% curve distribution to the limit from maximum deflection position P.
And, the pitching angle β of axial fan have from wheel hub to the limit size be 35.0 ° to 24.0 ° linear distribution.In this case, select the optimum value of pitching angle β in the scope from 20 ° to 25 °.According to the result of Fig. 4, noise is minimized here.
Has be 72.0 ° away from blade summit ± 10% numerical value according to the sweepback angle α of the axial fan of the second embodiment of the present invention.It selects to satisfy 69 ° to 72 ° scope, and according to the result of Fig. 5, noise is minimum here.In other words, the sweepback angle α of axial fan 20 is greater than the sweepback angle of conventional axial-flow fan, so that axial fan 20 can make air stream and the minimum interference that is positioned at other parts axial fan 20 rear portions, that comprise condenser, so remarkable reduction noise.
Gou Zao axial fan 20 can not only have clockwise but also have the direction of being rotated counterclockwise as mentioned above.
Simultaneously, constitute the data boundary of the blade 202 of axial fan with reference to the accompanying drawings with following table explanation.
At first, Figure 10 is a sectional view that is used for the axial fan of refrigerator of the present invention, is used to illustrate the blade border on 160 zone bits.Wherein, the border of blade 202 is divided into 160 zone bits, and the position of each zone bit utilizes three coordinate X, Y, Z to represent three-D profile.
As shown in figure 10, blade 202 is divided into 160 zone bits along clockwise direction, and these zone bits are from wheel hub forequarter 1, through hub side rear portion 41, blade summit rear flank portion and blade summit forequarter 121 arrive hub side front portion 161 again, and each regional coordinate is as shown in the table.Here, the X coordinate is represented horizontal axis, and the Y coordinate is represented vertical shaft, and the Z coordinate is represented running shaft.Wherein each regional boundary value has a millimeter unit.
Table 1
No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 X -9.368 -9.341 -9.261 -9.129 -8.945 -8.711 -8.423 -8.084 -7.691 -7.245 -6.746 -6.196 -5.595 -4.948 -4.257 -3.527 -2.763 -1.972 -1.16 -0.335 0.495 1.324 2.138 2.924 3.873 4.381 5.045 5.662 6.23 6.748 7.216 7.634 8.005 8.328 8.605 8.838 9.028 9.176 9.282 9.346 9.368 9.192 8.952 8.671 8.368 8.053 7.734 7.417 7.106 6.804 6.512 6.233 5.968 5.698 Y 8.276 8.307 8.396 8.539 8.731 8.965 9.236 9.534 9.854 10.186 10.523 10.857 11.178 11.479 11.753 11.992 12.191 12.343 12.446 12.496 12.49 12.43 12.316 12.153 11.948 11.707 11.437 11.144 10.837 10.522 10.207 9.898 9.601 9.322 9.066 8.839 8.654 8.489 8?372 8.301 8.276 9.972 11.565 13.073 14.51 15.888 17.218 18.506 19.761 20.987 22.189 23.371 24.535 25.688 ?Z -6.559 -6.544 -6.5 -6.426 -6.323 -6.19 -6.026 -5.831 -5.605 -5.345 -5.053 -4.729 -4.373 -3.988 -3.574 -3.136 -2.877 -2.199 -1.709 -1.21 -0.707 -0.206 ?0.293 ?0.8 ?1.309 ?1.817 ?2.318 ?2.809 ?3.284 ?3.742 ?4.177 ?4.586 ?4.966 ?5.314 ?5.625 ?5.898 ?8.128 ?6.312 ?6.447 ?6.531 ?6.559 ?6.643 ?6.753 ?6.89 ?7.049 ?7.225 ?7.412 ?7.603 ?7.789 ?7.975 ?8.173 ?8.382 ?8.602 ?8.823
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 5.407 5.095 4.76 4.402 4.023 3.621 3.196 2.748 2.277 1.783 1.266 0.726 0.162 -0.426 -1.067 -1.798 -2.621 -3.534 -4.537 -5.63 -6.812 -8.081 -9.437 -10.88 -12.44 -15.35 -19.85 -19.96 -20.3 -20.85 -21.6 -22.54 -23.65 -24.93 -26.34 -27.89 -29.55 -31.3 -33.13 -35 -36.91 -38.83 -40.73 -42.59 -44.38 -46.09 -47.67 -49.1 -50.38 -51.5 -52.46 -53.25 -63.88 -54.36 -54.69 26.836 27.977 29.114 30.244 31.368 32.486 33.598 34.704 35.803 36.894 37.979 39.056 40.125 41.185 42.237 43.275 44.298 45.3 46.278 47.228 48.146 49.026 49.865 50.657 51.39 51.709 51.295 51.25 51.116 50.894 50.58 50.168 49.654 49.028 48.281 47.405 46.389 45.225 43.906 42.423 40.773 38.953 36.962 34.805 32.485 30.017 27.442 24.783 22.064 19.307 16.537 13.778 11.056 8.395 5.819 9.035 9.237 9.43 9.613 9.786 9.95 10.103 10.247 10.382 10.506 10.621 10.726 10.821 10.906 10.967 10.986 10.963 10.9 10.797 10.656 10.477 10.187 9.688 8.893 7.774 5.006 -1.122 -1.293 -1.685 -2.224 -2.954 -3.837 -4.854 -5.984 -7.203 -8.485 -8.807 -11.15 -12.49 -13.8 -15.07 -16.28 -17.39 -18.41 -19.31 -20.09 -20.8 -21.47 -22.07 -22.61 -23.08 -23.49 -23.82 -24.1 -24.31
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 -54.9 -54.99 -54.99 -54.91 -54.77 -54.59 -54.4 -54.21 -54.04 -53.9 -53.82 -53.78 -52.11 -50.88 -50.07 -49.26 -48.43 -47.59 -46.73 -45.86 -44.96 -44.04 -43.1 -42.13 -41.14 -40.12 -39.06 -37.98 -36.88 -35.75 -34.61 -33.45 -32.28 -31.1 -29.91 -28.71 -27.52 -26.32 -25.13 -23.94 -22.76 -21.57 -20.38 -19.18 -17.98 -16.77 -15.56 -14.34 -13.31 -11.88 -10.63 -9.368 ?3.351 ?1.012 -1.177 -3.199 -5.036 -6.672 -8.093 -9.285 -10.23 -10.93 -11.36 -11.5 -13.91 -14.09 -13.33 -12.22 -11.1 -9.975 -8.848 -7.717 -6.581 -5.44 ?4.294 ?3.145 ?1.991 -0.87 ?0.186 ?1.178 ?2.105 ?2.967 ?3.764 ?4.495 ?5.161 ?5.761 ?6.297 ?6.768 ?7.175 ?7.518 ?7.799 ?8.017 ?8.191 ?8.339 ?8.461 ?8.556 ?8.623 ?8.663 ?8.675 ?8.658 ?8.611 ?8.533 ?8.422 ?8.276 -24.48 -24.61 -24.69 -24.74 -24.77 -24.78 -24.78 -24.78 -24.78 -24.8 -24.84 -24.89 -24.44 -24.11 -23.9 -23.68 -23.44 -23.18 -22.9 -22.6 -22.29 -21.95 -21.59 -21.2 -20.79 -20.36 -19.91 -19.45 -18.98 -18.49 -18 -17.49 -16.98 -16.46 -15.94 -15.41 -14.88 -14.36 -13.83 -13.31 -12.78 -12.25 -11.71 -11.16 -10.6 -10.04 -9.474 -8.901 -8.323 -7.739 -7.152 -6.559
Unit：mm
Under identical air output, relatively as follows according to the axial fan of second embodiment of the invention and the traditional noise that axial fan produced.
Figure 11 is a plotted curve, the axial fan model of expression second embodiment of the invention and the noise variation of conventional axial-flow fan.Wherein vertical shaft is represented sound pressure, and horizontal axis is represented mobility, according to different capacity such as 140,360,420 and 500 liters, come comparison the present invention and
The axial fan of prior art.
As shown in figure 11, in the time of 140 liters, when identical air output, second embodiment of the invention is compared with correlation technique, and the noise of axial fan hangs down about 4.14dB.In the time of 360 liters, when identical air output, second embodiment of the invention is compared with correlation technique, and the noise of axial fan hangs down about 2.35dB.In the time of 420 liters, noise hangs down about 2.54dB.In the time of 500 liters, noise hangs down about 2.55dB.
Therefore, even have difference between the above-mentioned model, but when obtaining identical throughput, reduce the noise of average 2.5dB at least than conventional axial-flow fan according to the axial fan of second embodiment of the invention.
At this moment, according to the low 100rpm of rotating speed of the axial fan rotating ratio conventional axial-flow fan of second embodiment of the invention, the result can obtain identical throughput under the slow-speed of revolution, thereby has improved the efficient of axial fan.

Claims (5)

1. the axial fan of a condenser for refrigerator, it is characterized in that, described axial fan comprises three blades, internal diameter is 23.0 ± 5% with the ratio of external diameter, the maximum deflection position of axial fan is 0.65, evenly distribute to the blade summit from wheel hub, maximum deflection has from wheel hub and is 4.0% to 5.0% to the maximum deflection position and from the maximum deflection position is 5.0% to 6.0% curve distribution to the blade summit.
2. condenser axial fan as claimed in claim 1, it is characterized in that, described each blade have from wheel hub to blade summit linear distribution, size is 35.0 ° to 24.0 ° pitching angle, and is 72.0 ° ± 10% sweepback angle in place, blade summit size.
3. condenser axial fan as claimed in claim 1 is characterized in that described external diameter is 110 ± 1mm, and hub diameter is 25 ± 1mm, and the width of each blade is 36.0 ± 1mm.
4. condenser axial fan as claimed in claim 1 is characterized in that, during from forward observation, described axial fan clockwise or be rotated counterclockwise.
5. condenser axial fan as claimed in claim 3, it is characterized in that, described each blade has the border that begins to be divided into along clockwise direction 160 zone bits from the wheel hub forequarter, wherein the running shaft of axial fan is defined as the Z axle, horizontal axis and vertical shaft by the Z axle are defined as X-axis and Y-axis respectively, and described zone bit has X, Y, the Z coordinate according to table 1.
CNA2005100626961A 2001-01-11 2001-12-18 Fan for condenser for refrigerator Pending CN1699757A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2001-0001532A KR100421861B1 (en) 2001-01-11 2001-01-11 axial fan for refrigerator
KR1532/2001 2001-01-11
KR9315/2001 2001-02-23

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KR100421861B1 (en) 2004-03-09
KR20020060439A (en) 2002-07-18

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