CN101457764A - Variable cross-section forward multiple wing centrifugal fan - Google Patents
Variable cross-section forward multiple wing centrifugal fan Download PDFInfo
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- CN101457764A CN101457764A CNA2007101510270A CN200710151027A CN101457764A CN 101457764 A CN101457764 A CN 101457764A CN A2007101510270 A CNA2007101510270 A CN A2007101510270A CN 200710151027 A CN200710151027 A CN 200710151027A CN 101457764 A CN101457764 A CN 101457764A
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- vane
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- wing centrifugal
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Abstract
The invention relates to a variable section forward multi-wing centrifugal fan which is provided with 18 to 35 fan vanes arranged on the circular framework of the fan in equal distance; the projection view of a vane profile is a trapezium; the section area of the vanes is gradually reduced from the root part to the top part; the reduction proportion is 65 to 70 percent. One end of a top side at the top part of the vane is fixed on the upper circular side of the fan framework; the root side of the root part of the vane is fixed on the lower circular side of the fan framework and a chassis connected with a motor shaft; the connection line at the other end of the upper side of the top part of the vane forms the horn-shaped air inlet of the fan; the air inlet angle of the air inlet of the fan is between 165 and 170 degrees. The variable section forward multi-wing centrifugal fan employs the vanes the sections of which are trapezium to increase the vane area of the fan, reduce the vane number, increase the accelerating time of the vane to an air flow, reduce the fixed connection points between the vanes and the chassis, lead the air amount of the fan to be increased and improve the reliability.
Description
Technical field
The present invention relates to air conditioner, particularly relate to the fan of air conditioner.
Background technique
Air conditioner is a kind of electrical installations of room temperature being regulated and remained on the required situation of user, mainly is made of cooling cycle system and air circulation system.The air conditioning effect of air conditioner is finished jointly by cooling cycle system and air circulation system.Cooling cycle system comprises heat exchanger, compressor and throttling device.Air circulation system comprises fan and fan electromotor, inlets and putlets of ventilation and air filter.The cooling cycle system of air conditioner and the operation of air circulation system are controlled by electrical apparatus control system, the refrigerating/heating operation of control air conditioner, and carry out room temperature setting and wind speed control etc.
Under the control of electrical apparatus control system, refrigeration agent in the air conditioner cooling cycle system absorbs heat and heat release in the circulation of compression → condensation → expansion → evaporation, and carry out heat exchange with indoor air by the fan forced flow of air circulation system, to realize room temperature lowering or intensification, for people provide fresh, comfortable indoor air environment.
Air conditioner is broadly divided into package AC plant and detachable air conditioner.Package AC plant all is contained in all parts in the casing, is installed in indoor and outdoor jointing place, as is installed in the window air conditioner on the room window.The heat exchanger of vaporizer or condenser effect has been set respectively in the indoor and outdoors part.Refrigeration agent circulates in vaporizer and condenser by the conduit that connects between the indoor and outdoors and carries out the heat exchange circulation, moves with the refrigerating state operation that realizes air conditioner or the state that heats.
Detachable air conditioner is made up of indoor set and outdoor unit, and the heat exchanger of vaporizer or condenser effect has been set respectively in indoor set and outdoor unit.Refrigeration agent circulates in vaporizer and condenser by the conduit that connects between indoor set and the outdoor unit and carries out the heat exchange circulation, moves with the refrigerating state operation that realizes air conditioner or the state that heats.
Fan and fan electromotor are the chief components of air circulation system, are separately positioned on the vaporizer and the condenser next door of air conditioner.Fan forces indoor air constantly to enter air conditioner with heat exchanger carries out heat exchange under the drive of fan electromotor, and then flows back to indoorly, and the air circulation of so carrying out exchanges the air conditioning of realization room temperature lowering or intensification.
The fan of air conditioner mainly contains centrifugal cutter, axial-flow fan and axial fan.Centrifugal cutter is mainly adopted in the heat exchange of window air conditioner and cabinet-type air conditioner indoor evaporator, and axial-flow fan is mainly adopted in the heat exchange of wall-hanging air conditioner indoor evaporator, and air conditioner chamber's external condenser all adopts axial fan.
Fig. 1 shows a kind of centrifugal cutter structure of prior art.As shown in the figure, fan blade 1 is arranged in the annular frame of fan, and what the upper topside of vane tip was fixed on fan frame goes up the ring limit, the bottom of root of blade be fixed on encircle fan frame under the limit with chassis that motor shaft is connected on.Blade is to a lateral bending song, and the upper topside of blade and bottom are to a lateral bending song.The projection view of blade profile is a rectangle.
Above-mentioned centrifugal cutter is fast rotational under driven by motor, and the fan blade of quick rotation sucks air from the place ahead, discharges to the circumference centrifugal direction, and then guides heat exchanger into.Quicken to air-flow at the volley the side of fan blade.
But the centrifugal cutter of above-mentioned prior art, blade quantity many (41), area is little.Blade area is little, gives the air-flow time for acceleration short, and the restriction air quantity of fan increases; Blade quantity is many, and when fan was installed, being fixedly connected of blade and chassis was a little many, has increased the factor that influences reliability.
Summary of the invention
Centrifugal cutter at above-mentioned prior art, the outline projection that is adopted is the blade of rectangle, quantity is many, area is little, there is the problem that influences fan performance, the present invention releases the centrifugal cutter of new structure, change the shape of blade, adopting the outline projection of cross-section variation is trapezoidal blade, increase the blade area of fan, increase blade and give the time for acceleration of air-flow, reduce blade quantity, reduce being fixedly connected a little of blade and chassis, make air quantity of fan increase and increase the reliability of vanes fixed connection.
Variable cross-section forward multiple wing centrifugal fan involved in the present invention, comprise the fan blade in the annular frame that is arranged in fan, the upper topside of vane tip is fixed on going up on the ring limit of fan frame, the foundation limit of root of blade be fixed on encircle fan frame under the limit with chassis that motor shaft is connected on.The projection view of blade profile is trapezoidal, and the upper topside of vane tip forms the last base of projection rectangle, and the foundation limit of root of blade forms the trapezoidal bottom of projection, and the blade upper topside is less than the blade root base.
The outline projection view is trapezoidal blade, and its cross-section area dwindles from the root to the top gradually, and reduce in scale is 65～70%.
Fan blade is 18～35, and blade is equidistant to be arranged on the annular frame of fan.
One end of vane tip upper topside is fixed on going up on the ring limit of fan attachment framework, and the line of the other end of vane tip upper topside forms the tubaeform intake grill of fan, and the air intake angle of wind inlet of fan is 165 °～170 °.
Variable cross-section forward multiple wing centrifugal fan involved in the present invention, adopting outline projection is trapezoidal blade, the bottom lengthening of root of blade, increase the blade area of fan, reduce blade quantity, increase blade and give the time for acceleration of air-flow, reduce the interface that installs and fixes on blade and chassis, air quantity of fan is increased and the raising reliability.
Description of drawings
Fig. 1 is a kind of centrifugal cutter structural drawing of prior art.
Fig. 2 is a variable cross-section forward multiple wing centrifugal fan structural drawing involved in the present invention.
Fig. 3 is centrifugal cutter projecting blade figure among Fig. 2.
Description of symbols in the accompanying drawing:
1. rectangle projection blade 2. trapezoidal projection blades
3. upper topside 4. foundation limits
5. go up 6. times rings limit, ring limit
7. base on the chassis 8.
9. bottom
Embodiment
Be described with reference to the accompanying drawings specific embodiments of the invention.
Fig. 2 shows variable cross-section forward multiple wing centrifugal fan structure involved in the present invention, and Fig. 3 is centrifugal cutter projecting blade figure among Fig. 2.
As shown in Figures 2 and 3, variable cross-section forward multiple wing centrifugal fan involved in the present invention, comprise the fan blade 2 in the annular frame that is arranged in fan, the upper topside 3 of vane tip is fixed on going up on the ring limit 5 of fan frame, and the foundation limit 4 of root of blade is fixed on to be encircled fan frame under on limit 6 and the chassis 7 that is connected with motor shaft.The projection view of blade profile is trapezoidal, and the upper topside 3 of vane tip forms the last base 8 of projection rectangle, and the foundation limit 4 of root of blade forms the trapezoidal bottom 9 of projection, and last base 8 is less than bottom 9.The blade 2 of fan is equidistant to be arranged on the annular frame of fan, and an end of vane tip upper topside 3 is fixed on going up on the ring limit 5 of fan attachment framework, and the line of the other end of vane tip upper topside 3 forms the tubaeform intake grill of fan.
Embodiment 1
Fan blade is 20, and blade is equidistant to be arranged on the annular frame of fan; Leaf cross-section is long-pending to be dwindled from the root to the top gradually, and reduce in scale is 65%; The air intake angle of wind inlet of fan is 165 °.
Fan blade is 30, and blade is equidistant to be arranged on the annular frame of fan; Leaf cross-section is long-pending to be dwindled from the root to the top gradually, and reduce in scale is 70%; The air intake angle of wind inlet of fan is 170 °.
Claims (4)
1, a kind of variable cross-section forward multiple wing centrifugal fan, comprise the fan blade in the annular frame that is arranged in fan, the upper topside of vane tip is fixed on going up on the ring limit of fan frame, the foundation limit of root of blade be fixed under the fan frame ring limit with chassis that motor shaft is connected on, it is characterized in that, the projection view of blade profile is trapezoidal, the upper topside of vane tip forms the last base of blade profile trapezoidal projection view, the foundation limit of root of blade forms the bottom of trapezoidal projection, and the blade upper topside is less than the blade root base.
2, variable cross-section forward multiple wing centrifugal fan according to claim 1 is characterized in that, leaf cross-section is long-pending to be dwindled from the root to the top gradually, and reduce in scale is 65～70%.
3, variable cross-section forward multiple wing centrifugal fan according to claim 1 is characterized in that, fan blade is 18～35, and blade is equidistant to be arranged on the annular frame of fan.
4, variable cross-section forward multiple wing centrifugal fan according to claim 1, it is characterized in that, one end of vane tip upper topside is fixed on going up on the ring limit of fan attachment framework, the line of the other end of vane tip upper topside forms the tubaeform intake grill of fan, and the air intake angle of wind inlet of fan is 165 °～170 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101510270A CN101457764A (en) | 2007-12-14 | 2007-12-14 | Variable cross-section forward multiple wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101510270A CN101457764A (en) | 2007-12-14 | 2007-12-14 | Variable cross-section forward multiple wing centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101457764A true CN101457764A (en) | 2009-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101510270A Pending CN101457764A (en) | 2007-12-14 | 2007-12-14 | Variable cross-section forward multiple wing centrifugal fan |
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| CN (1) | CN101457764A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287385A (en) * | 2011-09-04 | 2011-12-21 | 余旦 | Centrifugal blower fan |
| CN102478021A (en) * | 2010-11-25 | 2012-05-30 | 先锋电器集团有限公司 | Improved centrifugal type wind wheel as well as volute and turbine fan assembly |
| CN102966594A (en) * | 2012-11-27 | 2013-03-13 | 海信（北京）电器有限公司 | Centrifugal fan, centrifugal blower and air-cooling type refrigeration equipment |
| CN103388592A (en) * | 2013-08-06 | 2013-11-13 | 江阴市汇通包装机械有限公司 | Impeller |
| CN108144855A (en) * | 2016-12-06 | 2018-06-12 | 郑州狮虎磨料磨具有限公司 | A kind of special fan blade of turbine airflow grader |
| CN110319054A (en) * | 2019-05-30 | 2019-10-11 | 宁波方太厨具有限公司 | A kind of impeller for forward centrifugal blower |
| CN110985439A (en) * | 2019-12-25 | 2020-04-10 | 宁波奥克斯电气股份有限公司 | Forward-bent impeller, centrifugal fan and air conditioner |
-
2007
- 2007-12-14 CN CNA2007101510270A patent/CN101457764A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478021A (en) * | 2010-11-25 | 2012-05-30 | 先锋电器集团有限公司 | Improved centrifugal type wind wheel as well as volute and turbine fan assembly |
| CN102287385A (en) * | 2011-09-04 | 2011-12-21 | 余旦 | Centrifugal blower fan |
| CN102966594A (en) * | 2012-11-27 | 2013-03-13 | 海信（北京）电器有限公司 | Centrifugal fan, centrifugal blower and air-cooling type refrigeration equipment |
| CN103388592A (en) * | 2013-08-06 | 2013-11-13 | 江阴市汇通包装机械有限公司 | Impeller |
| CN108144855A (en) * | 2016-12-06 | 2018-06-12 | 郑州狮虎磨料磨具有限公司 | A kind of special fan blade of turbine airflow grader |
| CN110319054A (en) * | 2019-05-30 | 2019-10-11 | 宁波方太厨具有限公司 | A kind of impeller for forward centrifugal blower |
| CN110985439A (en) * | 2019-12-25 | 2020-04-10 | 宁波奥克斯电气股份有限公司 | Forward-bent impeller, centrifugal fan and air conditioner |
| CN110985439B (en) * | 2019-12-25 | 2022-01-25 | 宁波奥克斯电气股份有限公司 | Forward-bent impeller, centrifugal fan and air conditioner |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090617 |