CN103850948A - Centrifugal fan and refrigerator using fan - Google Patents
Centrifugal fan and refrigerator using fan Download PDFInfo
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- CN103850948A CN103850948A CN201310419859.1A CN201310419859A CN103850948A CN 103850948 A CN103850948 A CN 103850948A CN 201310419859 A CN201310419859 A CN 201310419859A CN 103850948 A CN103850948 A CN 103850948A
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Abstract
The invention relates to a centrifugal fan and a refrigerator using the fan. The centrifugal fan comprises a chassis, an inner hub and a plurality of blades, wherein the inner hub is fixedly arranged in the middle of the chassis, the blades are distributed around the inner hub and are fixedly arranged on the chassis, one end, near the inner hub, of each blade is provided with an inner circle end, one end, away from the inner hub, of each blade is provided with an outer circle end, the blades are distributed from the inner circle ends to the outer circle ends, the axial height of the fan is gradually reduced from the top of each blade in the axial direction of the fan to the direction of the chassis, and the distance from the height reduction initial position of each blade in the axial direction of the fan to the axis of the inner hub is equal to 74% to 81% of the radius length of the fan. The centrifugal fan has the advantages that the structure is simple; the axial height of the outer circle end of each blade is reduced, and the pressure on the outer circle end of each blade is reduced, so the noise is reduced; according to the proof by experiments, the effect of the height reduction initial position at the 74% to 81% of the fan radius is better.
Description
Technical field
The present invention relates to a kind of fan, particularly a kind of centrifugal cutter and apply the refrigerator of this fan.
Background technique
At present, chiller plant (such as refrigerator, refrigerator etc.) is household electric appliance conventional in people's daily life, chiller plant is divided into air cooling refrigeration equipment and direct cooling type chiller plant, and air cooling refrigeration equipment, because its refrigerating efficiency is high, can not produce a large amount of frostings and be widely used in casing.
Air cooling refrigeration equipment uses blower fan to reach refrigeration, general axial-flow blower or the centrifugal blower of adopting, centrifugal blower can produce the blast larger than axial-flow blower, increasing at current refrigerator capacity, under the trend that air channel becomes increasingly complex, if the blast that blower fan produces is too little, be unfavorable for the wind circulation in refrigerator, so air cooling refrigeration equipment adopts centrifugal blower cold wind to be sent in the storage space of casing conventionally, realization refrigerates the article in storage space or is freezing.But for air cooling refrigeration equipment, if fan noise is excessive, certainly will cause user's dislike, the fan structure of the centrifugal blower of conventional structure is applied to can not meet noise requirements conventionally on air cooling refrigeration equipment.
At present, the method that reality is improved fan noise is mainly to reduce noise by reducing wind speed, there will be but reduced rotation speed of fan problems such as reducing air output, air-out speed, causes refrigeration not good, thereby makes wind cooling refrigerator performance not up to standard.
Summary of the invention
Main purpose of the present invention is to address the above problem and is not enough, provides a kind of simple in structure, has the centrifugal cutter of good air output and noise control performance and applies the refrigerator of this fan.
For achieving the above object, technological scheme of the present invention is:
Plant centrifugal cutter, comprise chassis, interior hub and multiple blade, described interior hub is fixed in the middle of described chassis, described blade distributes and is fixed on described chassis around described interior hub, described blade is interior nose circle near one end of described interior hub, described blade is away from nose circle outside one end of described interior hub, described blade from interior nose circle to nose circle, the axial height of fan diminishes to described chassis direction at fan shaft end face upwards gradually from blade, the initial position that described blade diminishes at fan shaft height is upwards the 74%-81% of described fan radius length to the distance of described interior hub axis.
Further, the initial position that described blade diminishes at fan shaft height is upwards 77% of described fan radius length to the distance of described interior hub axis.
Further, the surface of the outer nose circle of fan is diminished gradually and is circular shape by described blade axial height.
Further, the radius of curvature of circular shape is 55-65mm.
Further, the radius of curvature of circular shape is 60mm.
Further, the number of blade is 13.
Further, blade is circular shape bending.
Further, the radius of curvature of circular shape curved vane is 55-56mm.
Further, the radius of curvature of circular shape curved vane is 55.79mm.
Another technological scheme of the present invention is:
A kind of refrigerator, comprises above-mentioned centrifugal cutter.
To sum up content, a kind of centrifugal cutter of the present invention and apply the refrigerator of this fan, simple in structure, diminish by the outer nose circle axial height of blade, the outer nose circle pressurized of blade is reduced, thereby reduced noise, and proved by experiment, the initial position highly diminishing is better in the effect of the 74%-81% of fan radius.By the optimization of the bending radius to blade number, blade, entrance setting angle, exit installation angle degree etc., make fan there is good air output and noise reduction capability again.Experiment showed, that the present invention can guarantee air output, and noise greatly reduces.
Accompanying drawing explanation
Fig. 1 is the structural representation of fan of the present invention;
Fig. 2 is the A-A face sectional view of Fig. 1;
Fig. 3 is the stereogram of fan of the present invention;
Fig. 4 is the blade structure schematic diagram of fan of the present invention.
As shown in Figures 1 to 4, chassis 1, interior hub 2, blade 3, inner edge 31, outer rim 32, end face 33, entrance setting angle α, exit installation angle degree β, concentric circle one R1, concentric circle two R2, concentric circle three R3.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
As shown in Figure 1 to Figure 3, the centrifugal cutter of the present embodiment, comprises chassis 1, interior hub 2 and multiple blade 3, and interior hub 2 is fixed on 1 middle part, chassis, the position of Fan axial center, and blade 3 distributes around interior hub 2, and blade 3 is fixed on chassis 1.
For embodiment states conveniently, here we define: blade 3 is interior nose circle near one end of interior hub 2, and blade 3 is away from nose circle outside one end of interior hub 2, wherein, being inner edge 31 at the interior nose circle of blade 3 and the nearest side of interior hub 2, is outer rim 32 at the outer nose circle of blade 3 and interior hub 2 side farthest.Blade 3 is end face 33 at fan shaft upper surface upwards, and the end face 33 of blade 3 is the height H of blade 3 to the distance on chassis 1, and blade 3 is in fan shaft height H upwards.The outer nose circle of fan refers to the circumferential area that the outer nose circle of each blade 3 forms, and the surface of the outer nose circle of fan refers to the surface that the end face 33 of the outer nose circle of each blade 3 forms.
Centrifugal cutter is fixed on the machine shaft of centrifugal blower by interior hub 2, extraneous air is drawn between two adjacent blades 3 from interior hub 2, air will flow along blade 3, and finally export through blade 3, be that air enters between two blades 3 from inner edge 31, then export from outer rim 32.
As shown in Figure 4, in the present embodiment, blade 3 is curved vane, its bending be shaped as circular arc, circular arc described here can refer to the one section of circular arc being cut out on a circle, and the radius of curvature of circular arc each point is identical, can be also the arc structure of variable curvature.Concentric circle one R1, concentric circle two R2 and concentric circle three R3 and the concentric setting of interior hub 2, the distance of the center of circle of interior hub 2 and inner edge 31 is the radius of concentric circle one R1, the distance of the center of circle of interior hub 2 and outer rim 32 is the radius of concentric circle three R3.Angle between two tangent lines at inner edge 31 and concentric circle one R1 intersection point place is entrance setting angle α, and the angle between outer rim 32 and two tangent lines at concentric circle three R3 intersection point places is exit installation angle degree β.
As shown in Figure 2, blade 3 from interior nose circle to nose circle, the end face 33 in fan shaft height H upwards by blade 3 is bending and diminish gradually to chassis 1 direction, in other words, the axial height of the outer rim 32 of blade 3 is lower than the axial height of inner edge 31.As shown in Figure 4, the distance between the initial position that the axial height H of the center of circle of interior hub 2 and blade 3 diminishes is the radius of concentric circle two R2.
Each blade 3 diminishes gradually in fan shaft height H upwards, make the surface of the outer nose circle of centrifugal cutter be circular arc, circular arc described here can be the one section of circular arc being cut out on a circle, and the radius of curvature of circular arc each point is identical, can be also the camber line of variable curvature radius.The radius of curvature of circular arc is 55-65mm, and preferred, the radius of curvature of circular arc is 60mm, and in other words, the surface Machining of the outer nose circle of fan is circular arc, and each blade 3 natures of fan are because processing becomes the shape that outer nose circle height diminishes gradually.
It should be noted that, the circular arc that above-mentioned fan cylindrical end surfaces presents and circular arc radius of curvature numerical value, be not the reclinate shape of end face 33 and the radius of curvature numerical value of blade 3, because from the direction shown in Fig. 1, blade 3 itself is also curved vane, so adding man-hour, from the fan curved shape of processing excircles end on the whole, be complex machining process.And the surface Machining of the outer nose circle of fan is become to all kinds of curved shapes or rectilinear form, test respectively, learn surface noise reduction the best for circular arc.
As shown in Figure 4, the distance length between the initial position that the height H of the center of circle of interior hub 2 and blade 3 diminishes is the radius length of concentric circle two R2; The radius of centrifugal cutter is the radius of concentric circle three R3.The radius length of concentric circle two R2 is the 74%-81% of concentric circle three R3 radius length, preferably 77%, in other words, take interior hub 2 centers of circle as starting point, the length of the 74%-81% of centrifugal cutter radius, the length of distance between the initial position diminishing for blade 3 axial height H and the center of circle of interior hub 2, learn through great many of experiments, in this length range, the effect of fan noise prevention and air output is better, and wherein 77% is best.
The centrifugal cutter of the present embodiment, by the axial height H step-down gradually of blade 3, reduces the outer nose circle pressurized of blade 3, thereby has reduced noise.
It should be noted that, in the present embodiment, blade 3 can be bending, can be also form of straight lines; The radius size of centrifugal cutter is changeable; The curved shape of blade 3 and degree of crook are not unique yet, and the shape that these do not affect change blade 3 end faces 33 described in the present embodiment changes the surface configuration of the outer nose circle of centrifugal cutter in other words, thereby reduces noise, increases the effect of air output.In other words, no matter blade 3 is bending or form of straight lines, and how are the shape of blade 3 bendings and degree, and centrifugal cutter radius is to be greatly little, thereby does not affect the shape minimizing noise that changes blade 3 end faces 33, increases the effect of air output.
The present embodiment is further optimization of the embodiment 1, the centrifugal cutter of the present embodiment is applied in wind cooling refrigerator, consider mounting point and the mounting structure of centrifugal cutter in refrigerator, and in the time that centrifugal cutter self size changes, the curved shape of blade 3 also will change thereupon, be unfavorable for the factors such as experiment contrast, so for the radius of fan self, it is the radius of concentric circle three R3, the distance in the center of circle of inner edge 31 and interior hub 2, be the radius of concentric circle one R1, the axial height of inner edge 31 does not change.In the present embodiment, the radius of determining centrifugal cutter is 67.5mm, and the radius of concentric circle one R1 is 30mm, and the axial height of inner edge 31 is 28mm.
In the time that the radius of centrifugal cutter is 67.5mm, known by embodiment 1, the initial position that the axial height H of blade 3 diminishes, the radius of concentric circle two R2 between 50-55mm, preferred 52.5mm.
As shown in Figure 4, the bending radius of blade 3 mean camber lines 30 and blade 3 entrance setting angle α, exit installation angle degree β are the parameter that is mutually related, and it affects the curved shape of blade 3, and air output and noise control to fan have a great impact.Blade 3 is circular arc curved vane, the bending radius of blade 3 mean camber lines 30 is 55-56mm, entrance setting angle α is 28-32 °, exit installation angle degree β is 28-32 °, by in a large number to not on the same group the experiment of the curved shape of blade 3 draw optimum scheme, the present embodiment is preferred, the bending radius of blade 3 mean camber lines 30 is 55.79mm, entrance setting angle α is 30.78 °, and exit installation angle degree β is 30 °.
The number of the blade 3 also air output to fan and noise control has a significant impact, and experiment showed, when blade 3 is 13 air output and noise control best results.
To sum up, a kind of centrifugal cutter described in the present embodiment, by the axial height H of blade 3 is diminished, the pressure that the outer nose circle of blade 3 is subject to reduces, and has reduced the noise of fan, has increased air output; The radius of curvature, the entrance setting angle α of blade 3, the exit installation angle degree β of blade 3 that change blade 3 determine the curved shape of blade 3, change the curved shape of blade 3, are beneficial to fan air-out, reduce noise; Change number, optimization air quantity and the noise control effect of blade 3.By the above-mentioned optimization to blade 3 self shape, curved shape and number, design different centrifugal cutters, computer ancillary works software carries out flow field and sound field is calculated, and obtains meeting the optimized centrifugal cutter model of refrigerator air quantity and noise.
To sum up, the optimized centrifugal cutter model parameter of the present embodiment is: fan radius is 67.5mm, the radius of concentric circle one R1 is 30mm, the height of blade 3 inner edges 31 is 28mm, the height of blade 3 outer rims 32 is 25.5mm, the number of blade 3 is 13, blade 3 end faces 33 start the distance in bending position and interior hub 2 centers of circle, the radius that is concentric circle two R2 is 52.5mm, the surperficial circular arc radius of curvature of the outer nose circle of fan is 60mm, the radius of curvature of blade 3 is 55.79mm, and entrance setting angle α is 30.78 °, and exit installation angle degree β is 30 °.
The present invention also provides a kind of refrigerator, comprises the centrifugal cutter in the embodiment of the present invention.
As mentioned above, given scheme content, can derive similar technological scheme by reference to the accompanying drawings.In every case be the content that does not depart from technical solution of the present invention, any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a centrifugal cutter, comprise chassis, interior hub and multiple blade, described interior hub is fixed in the middle of described chassis, described blade distributes and is fixed on described chassis around described interior hub, described blade is interior nose circle near one end of described interior hub, described blade is away from nose circle outside one end of described interior hub, it is characterized in that: described blade from interior nose circle to nose circle, the axial height of fan diminishes to described chassis direction at fan shaft end face upwards gradually from blade, the initial position that described blade diminishes at fan shaft height is upwards the 74%-81% of described fan radius length to the distance of described interior hub axis.
2. a kind of centrifugal cutter according to claim 1, is characterized in that: the initial position that described blade diminishes at fan shaft height is upwards 77% of described fan radius length to the distance of described interior hub axis.
3. a kind of centrifugal cutter according to claim 1, is characterized in that: the surface of the outer nose circle of described fan is diminished gradually and is circular shape by described blade axial height.
4. a kind of centrifugal cutter according to claim 3, is characterized in that: the radius of curvature of described circular shape is 55-65mm.
5. a kind of centrifugal cutter according to claim 4, is characterized in that: the radius of curvature of described circular shape is 60mm.
6. a kind of centrifugal cutter according to claim 1, is characterized in that: the number of described blade is 13.
7. a kind of centrifugal cutter according to claim 1, is characterized in that: described blade is circular shape bending.
8. a kind of centrifugal cutter according to claim 7, is characterized in that: the radius of curvature of described circular shape curved vane is 55-56mm.
9. a kind of centrifugal cutter according to claim 8, is characterized in that: the radius of curvature of described circular shape curved vane is 55.79mm.
10. a refrigerator, is characterized in that: comprise a kind of centrifugal cutter as described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310419859.1A CN103850948A (en) | 2013-09-13 | 2013-09-13 | Centrifugal fan and refrigerator using fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310419859.1A CN103850948A (en) | 2013-09-13 | 2013-09-13 | Centrifugal fan and refrigerator using fan |
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| Publication Number | Publication Date |
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| CN103850948A true CN103850948A (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310419859.1A Pending CN103850948A (en) | 2013-09-13 | 2013-09-13 | Centrifugal fan and refrigerator using fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107514A (en) * | 2018-02-01 | 2019-08-09 | 佛山市建准电子有限公司 | Centrifugal fan and fan wheel thereof |
-
2013
- 2013-09-13 CN CN201310419859.1A patent/CN103850948A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107514A (en) * | 2018-02-01 | 2019-08-09 | 佛山市建准电子有限公司 | Centrifugal fan and fan wheel thereof |
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Application publication date: 20140611 |
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