CN109538529A - Centrifugal fan blade, courtyard machine and air conditioning system with same - Google Patents
Centrifugal fan blade, courtyard machine and air conditioning system with same Download PDFInfo
- Publication number
- CN109538529A CN109538529A CN201811418767.0A CN201811418767A CN109538529A CN 109538529 A CN109538529 A CN 109538529A CN 201811418767 A CN201811418767 A CN 201811418767A CN 109538529 A CN109538529 A CN 109538529A
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- blade
- centrifugation
- sections
- radius
- blade sections
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 11
- 238000005119 centrifugation Methods 0.000 claims description 57
- 238000000926 separation method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
Landscapes
- 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
The invention provides a centrifugal fan blade, a courtyard machine and an air conditioning system with the same. The centrifugal fan blade comprises an impeller shell and a plurality of blades arranged on the impeller shell, wherein the blades are arranged at intervals along the circumferential direction of the impeller shell, each blade comprises a first blade section and a second blade section connected with the first blade section, the first blade section and the second blade section are sequentially arranged along the axial direction of the centrifugal fan blade, and an included angle is formed between the first blade section and the second blade section. The centrifugal fan blade can reduce noise.
Description
Technical field
The present invention relates to apparatus of air conditioning field, in particular to a kind of centrifugation blade, courtyard machine and with its
Air-conditioning system.
Background technique
Courtyard machine, also known as ceiling machine or ceiling type, embedded type air conditioner.Since can to save space also more beautiful for courtyard machine
It sees, using relatively broad.The panel of courtyard machine is known as courtyard machine side plate, has frame, air inlet faceplate and outlet frame.Currently,
Air outlet is provided on frame, 4 air outlets being generally located on four sides are sent from ceiling to interior at a certain angle
Wind,
For courtyard machine, with becoming smaller for thickness, gas velocity increases in runner, on-way resistance and local resistance all with speed
Degree it is square directly proportional, therefore, to reduce the thickness of courtyard machine, reduce the volume of its occupancy, its noise will be made sharply to increase
Add, causes the noise of ultra-thin courtyard machine excessive, influence normal use.
Summary of the invention
The present invention is intended to provide a kind of centrifugation blade, courtyard machine and the air-conditioning system with it, to solve existing courtyard
Machine noise is easy excessive problem.
The present invention provides a kind of centrifugation blades comprising impeller housing and the multiple blades being arranged on impeller housing,
Multiple blades are provided at circumferentially spaced along impeller housing, and blade includes the first blade sections and the second leaf for being connected with the first blade sections
Segment, along the axial direction of centrifugation blade, the first blade sections and the second blade sections are set gradually, and the first blade sections and the second blade sections
Between have angle.
Optionally, the blade that the second blade sections are 0.1 times to 0.2 times in the value range of the axial height of centrifugation blade
In the axial height of centrifugation blade.
Optionally, the value range of angle is 150 °~180 °.
Optionally, impeller housing includes wheel cap and wheel hub, and wheel cap and wheel hub interval are arranged, and blade is arranged in wheel cap and wheel hub
Between.
Optionally, the junction of the first blade sections and the second blade sections is circular sliding slopes.
Optionally, wheel cap is ring cover, is provided with air inlet in the middle part of ring cover, is air outlet between wheel cap and wheel hub.
Optionally, the vertical sectional shape of wheel cap is arc, and the radius of the input end of wheel cap is the first radius, and wheel cap goes out
The radius at mouth end is the second radius, and the first radius is less than the second radius.
Optionally, the angle between the direction that radius is gradually increased, the first blade sections and the second blade sections gradually increases.
Optionally, in the axial direction, the curve of the longitudinal section of the second blade sections is determined according to following formula one: β=m*b2+n*
Wherein, β is the angle of the first blade sections and the second blade sections to b+c (formula one)；B is the air outlet in the axial direction of centrifugation blade
Height；M, n and c is preset value.
According to another aspect of the present invention, a kind of courtyard machine is provided comprising on centrifugation blade.
According to another aspect of the present invention, a kind of air-conditioning system is provided comprising above-mentioned courtyard machine.
Centrifugation blade, courtyard machine and the air-conditioning system with it according to the present invention, the blade of the centrifugation blade include the
One blade sections and the second blade sections can be effectively reduced due to having angle β between the first blade sections and the second blade sections
Flow separation at blade shell wall surface reduces power so that under equal conditions, improving fan delivery, and noise declines, thus
So that increasing air quantity still may be implemented lower level of noise in the case where reducing centrifugation blade thickness.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic view of the front view of centrifugation blade according to the present invention；
Fig. 2 is the single blade expanded schematic diagram of centrifugation blade according to the present invention；
Fig. 3 is the partial structural diagram of centrifugation blade according to the present invention；
Fig. 4 is the overlooking structure diagram of centrifugation blade according to the present invention；
Fig. 5 is the schematic perspective view at the first visual angle of centrifugation blade according to the present invention；
Fig. 6 is the schematic perspective view at the second visual angle of centrifugation blade according to the present invention.
Description of symbols:
11, wheel cap；12, wheel hub；20, blade；221, the first blade sections；222, the second blade sections.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 1 to 5, according to an embodiment of the invention, providing a kind of centrifugation blade comprising impeller housing and set
Multiple blades 20 on impeller housing, multiple being provided at circumferentially spaced along impeller housing of blade 20 are set, blade 20 includes first
Blade sections 221 and the second blade sections 222 being connected with the first blade sections 221, along the axial direction of centrifugation blade, the first blade sections 221
It is set gradually with the second blade sections 222, and there is angle between the first blade sections 221 and the second blade sections 222.
At least one blade 20 of the centrifugation blade includes the first blade sections 221 and the second blade sections 222, due to the first leaf
There is angle β, by using sectional design, the first blade to blade in the axial direction between segment 221 and the second blade sections 222
There is angle β between section and the second blade sections, so that speed axial component is introduced in runner, according to boundary layer transport theory,
The flow separation at blade shell wall surface can be effectively reduced, so that under equal conditions, improving fan delivery, reduces function
Rate, noise decline, so that increasing air quantity still may be implemented lower noise in the case where reducing centrifugation blade thickness
Value.
Wherein, flow separation refers to: for fluid when deceleration boost section flows, the fluid in wall boundary layer is due to flow velocity
It is low, influenced by adverse pressure gradient, flow velocity gradually decrease until direction change and the flowing inconsistent with main flow direction, this
Kind phenomenon is known as flow separation or boundary layer separation.
As shown in Figs. 1-5, impeller housing includes wheel cap 11 and wheel hub 12, and wheel cap 11 and the interval of wheel hub 12 are arranged, blade 20
It is arranged between wheel cap 11 and wheel hub 12.Wheel cap 11 and wheel hub 12 cooperatively form the impeller housing of centrifugation blade, to carry blade
20。
In the present embodiment, wheel cap 11 is ring cover, air inlet is provided in the middle part of ring cover, between wheel cap 11 and wheel hub 12
For air outlet.
As shown in figure 4, in order to optimize inlet air flow path, the vertical sectional shape of wheel cap 11 is arc, and wheel cap 11 into
The radius at mouth end is the first radius (R1 shown in Fig. 4), and the radius of the outlet end of wheel cap 11 is the second radius (shown in Fig. 4
R2), the first radius is less than the second radius.
As shown in fig. 6, the first blade sections 221 of blade 20 are connect with wheel hub 12, the second blade sections 222 connect with wheel cap 11
It connects, the radius (R3 shown in Fig. 6) of the second blade sections 222 and the outlet end intersection point of wheel cap 11.The cross section of first blade sections 221
First end (close to the one end in the center of circle) for arc, the first blade sections 221 is air intake, and the second end of the first blade sections 221 (is leaned on
One end of nearly air outlet) be outlet air end, along the direction of air intake to outlet air end, the first blade sections 221 between the center of circle at a distance from
(i.e. radius) is gradually increased.
It should be noted that the cross section of the first blade sections 221 refers to by the plane institute of the axis perpendicular to centrifugation blade
Section shape at section.
Angle of the angle β between the first blade sections 221 and the second blade sections 222, i.e., at same radius, the second blade
Line and the first leaf formed by intersection point and junction (the first blade sections 221 and the second blade sections 222) intersection point of the section 222 with wheel cap 11
The angle of line formed by segment 221 and 12 intersection point of wheel hub and junction intersection point.
Optionally, along the direction that radius is gradually increased (by the direction of input end to outlet end), the first blade sections 221 and
Angle β between two blade sections 222 is gradually increased.The value range of angle β is 150 °~180 °.In other words, the first blade
Section 221 and the second angle β between blade sections 222 are relatively small in input end, along radial direction, this angle β will therewith by
Cumulative big, when arriving outlet end, angle can reach 180 °.
The blade of the centrifugation blade of the present embodiment uses segment design in the axial direction, and 10%-20% blade goes out in height
It is designed at open height using dihedral vane (i.e. the second blade sections), inclined direction is identical as fan blade direction of rotation, it is preferable that second
The value range of the angle β of blade sections 222 and the first blade sections 221 is 160 °~175 °.And junction between the two uses
Hybrid connections, i.e., it is tangent in the face of both transition positions.
In other words, value model of second blade sections 222 in the axial height (height in Fig. 3 at L) of centrifugation blade
The blade 20 for 0.1 times to 0.2 times is enclosed in the axial height (height marked at B in Fig. 3) of centrifugation blade, is made an uproar to reduce
Sound.
Optionally, in the present embodiment, the curve of the longitudinal section of the second blade sections 222 is determined according to following formula one:
β=m*b2+ n*b+c (formula one)
Wherein, β is the angle of the first blade sections 221 and the second blade sections 222；B is the outlet air in the axial direction of centrifugation blade
The height of mouth；M, n and c is preset value.M, n and c can be determined according to R2.Compared to traditional blade table main in the axial direction
Now for a monotonic functional relationship, that is, column blade or with axial direction at a certain fixed angle, the present embodiment the second blade in the axial direction
There are quadratic law changing rule (i.e. β=m*b for the longitudinal section of section 2222+ n*b+c, in formula, m, n, c value and R2 exist
Certain relationship), two sections of blades smoothly transit in connection plane tangent.
It should be noted that the longitudinal section of the second blade sections 222 in the present embodiment refers to the axis for being crossed centrifugation blade
And perpendicular to the plane of the rotational plane of centrifugation blade institute's section shape at section.
Centrifugation blade can be used for small flow, high pressure air-conditioner set in, solve in the prior art by air-conditioner set shell
The limitation of body size, centrifugation blade exit radius R2 are often limited, and the matching for just causing diameter and blade height is improper, thus
The problem of causing flow separation at centrifugation blade wheel cap.The centrifugation blade can be adapted for blade height and impeller diameter design not
The case where matching, reduces noise by the segment design of blade.
According to another aspect of the present invention, a kind of courtyard machine is provided comprising above-mentioned centrifugation blade.
Using the courtyard machine of the centrifugation blade, due to the first blade sections 221 and the second blade of the blade 20 of centrifugation blade
There is angle β between section 222, can solve air-flow in the prior art and entrance side is caused to flow by axially translated radially move
Unevenly, this flow irregularity can cause occur secondary back phenomenon at wheel cap in turn, and efficiency decline, vortex noise increases
The problem of.In the case where not increasing the radius of corner R1 of wheel cap, raising efficiency reduces noise, avoids due to increasing fillet half
Diameter R1 causes the reduction of centrifugation blade exit width b so that 2 π R of centrifugation blade discharge area2B reduces, and causes outlet liquid stream absolute
The problem of increase of speed.
The centrifugation blade is applied in courtyard machine, can reduce noise, is solved for courtyard machine, and centrifugation blade goes out
Air port and heat exchanger gap are smaller, and the raising of outlet air absolute velocity increases the dry of air-flow and fin after reducing discharge area
Relate to, amplitude of pressure fluctuation increase, tonal noise with increase the problem of.
According to another aspect of the present invention, a kind of air-conditioning system is provided comprising above-mentioned courtyard machine.The courtyard machine can
Under installation dimension confined condition, improves fan delivery, reduces unit noise.
Centrifugation blade, courtyard machine and the air-conditioning system with it according to the present invention have the following technical effect that
The centrifugation blade is adapted to ultra-thin space, effectively reduces flow separation at wheel cap, under equal conditions, mentions
High fan delivery reduces power, noise decline.By in the axial direction to blade using sectional design, the first blade sections and the
Two blade sections are angled, under conditions of not changing wheel cap form, and speed axial component is introduced in runner, are based on boundary
Layer transport theory, to overcome the boundary-layer secondary back packing phenomenon at wheel cap, can have by drawing barometric gradient in axial direction
The reduction power of fan of effect reduces noise.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of centrifugation blade, which is characterized in that including impeller housing and the multiple blades being arranged on the impeller housing
(20), the multiple blade (20) being provided at circumferentially spaced along the impeller housing, the blade (20) include the first blade sections
(221) and with first blade sections (221) the second blade sections (222) being connected, along the axial direction of the centrifugation blade, described
One blade sections (221) and second blade sections (222) are set gradually, and first blade sections (221) and second leaf
There is angle between segment (222).
2. centrifugation blade according to claim 1, which is characterized in that second blade sections (222) are in the centrifugation wind
Axial height of the blade (20) that the value range of the axial height of leaf is 0.1 times to 0.2 times in the centrifugation blade
Degree.
3. centrifugation blade according to claim 1 or 2, which is characterized in that the value range of the angle be 150 °~
180°。
4. centrifugation blade according to claim 1, which is characterized in that first blade sections (221) and second leaf
The junction of segment (222) is circular sliding slopes.
5. centrifugation blade according to claim 1, which is characterized in that the impeller housing includes wheel cap (11) and wheel hub
(12), the wheel cap (11) and the wheel hub (12) interval are arranged, the blade (20) setting the wheel cap (11) with it is described
Between wheel hub (12).
6. centrifugation blade according to claim 5, which is characterized in that the wheel cap (11) is ring cover, the ring cover
Middle part is provided with air inlet, is air outlet between the wheel cap (11) and the wheel hub (12).
7. centrifugation blade according to claim 5, which is characterized in that the vertical sectional shape of the wheel cap (11) is arc,
And the radius of the input end of the wheel cap (11) is the first radius, the radius of the outlet end of the wheel cap (11) is the second radius,
First radius is less than second radius.
8. centrifugation blade according to claim 5, which is characterized in that along the direction that radius is gradually increased, first leaf
Angle between segment (221) and second blade sections (222) gradually increases.
9. centrifugation blade according to claim 1, which is characterized in that in the axial direction, second blade sections (222)
Longitudinal section curve according to following formula one determine:
β=m*b2+ n*b+c (formula one)
Wherein, β is the angle of the first blade sections (221) and second blade sections (222)；
B is the height of the air outlet in the axial direction of the centrifugation blade；
M, n and c is preset value.
10. a kind of courtyard machine, which is characterized in that including centrifugation blade of any of claims 1-9.
11. a kind of air-conditioning system, which is characterized in that including the courtyard machine described in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811418767.0A CN109538529B (en) | 2018-11-26 | Centrifugal fan blade, courtyard machine and air conditioning system with centrifugal fan blade and courtyard machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811418767.0A CN109538529B (en) | 2018-11-26 | Centrifugal fan blade, courtyard machine and air conditioning system with centrifugal fan blade and courtyard machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109538529A true CN109538529A (en) | 2019-03-29 |
| CN109538529B CN109538529B (en) | 2024-07-16 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185031A (en) * | 2013-04-03 | 2013-07-03 | 宁波朗迪叶轮机械有限公司 | Centrifugal fan vane |
| CN103195749A (en) * | 2012-01-10 | 2013-07-10 | 珠海格力电器股份有限公司 | Centrifugal fan blade, centrifugal fan and air conditioner indoor unit |
| CN103967838A (en) * | 2014-05-14 | 2014-08-06 | 珠海格力电器股份有限公司 | Centrifugal fan blade |
| CN209704915U (en) * | 2018-11-26 | 2019-11-29 | 珠海格力电器股份有限公司 | Centrifugal fan blade, courtyard machine and air conditioning system with same |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195749A (en) * | 2012-01-10 | 2013-07-10 | 珠海格力电器股份有限公司 | Centrifugal fan blade, centrifugal fan and air conditioner indoor unit |
| CN103185031A (en) * | 2013-04-03 | 2013-07-03 | 宁波朗迪叶轮机械有限公司 | Centrifugal fan vane |
| CN103967838A (en) * | 2014-05-14 | 2014-08-06 | 珠海格力电器股份有限公司 | Centrifugal fan blade |
| CN209704915U (en) * | 2018-11-26 | 2019-11-29 | 珠海格力电器股份有限公司 | Centrifugal fan blade, courtyard machine and air conditioning system with same |
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