CN115807791A - Fan and air condensing units air duct system - Google Patents
Fan and air condensing units air duct system Download PDFInfo
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- CN115807791A CN115807791A CN202211543132.XA CN202211543132A CN115807791A CN 115807791 A CN115807791 A CN 115807791A CN 202211543132 A CN202211543132 A CN 202211543132A CN 115807791 A CN115807791 A CN 115807791A
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Abstract
The invention provides a fan and an air-conditioning outdoor unit air duct system, and relates to the technical field of air conditioning, wherein the fan comprises a shell, movable blades, front guide blades and rear guide blades, and the shell is provided with an air inlet and an air outlet; the movable blade is arranged in the shell and is rotatably arranged on a rotating shaft arranged in the shell, and the movable blade is positioned between the air inlet and the air outlet; the front guide vane is arranged in the shell and positioned on the air inlet side of the movable vane and is used for guiding the airflow at the air inlet to the movable vane; the inside of casing is located to the back stator, and is located the air-out side of movable vane to the extending direction of pivot is the axial, and the back stator is used for the air current that flows out movable vane department to the axial rectification. The air duct system of the air conditioner outdoor unit comprises the fan. The invention at least relieves the following problems in the existing outdoor fan of the air conditioner: the technical problems that the working loss of the movable blades is large, the running noise of the fan is large, the airflow instability at the air outlet is high, and the efficiency of the fan is influenced are solved.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a fan and an air duct system of an air conditioner outdoor unit.
Background
In an air conditioner outdoor unit, a fan air duct system directly influences the air quantity required by heat exchange of a heat exchanger, so that the running performance of the system is influenced.
The wind channel internally mounted of fan has the movable vane, leaves the clearance in order to ensure that the movable vane rotates the time fan safe operation between movable vane and the wind channel inner wall. When the air current flows through the clearance flow direction air outlet between movable vane and the wind channel inner wall from the air intake of fan:
firstly, if the incoming flow is rapid or unstable, a complex flow field may be formed at the air inlet of the air duct by the airflow, which affects the working of the movable blade and further affects the efficiency of the fan;
secondly, a gap between the movable blade and the inner wall of the air duct causes a gap leakage flow to be formed under the driving of the pressure difference between the suction side (air inlet side) and the pressure side (air outlet side) of the movable blade, the gap leakage flow is a very common phenomenon in the air flow, a vortex structure is easy to appear in the vicinity of the gap and a downstream flow field due to the existence of shear flow in the gap, and under the working conditions of relatively high partial flow rate and relatively low pressure, a cavitation phenomenon caused by gap leakage often occurs, and the phenomenon can generate adverse effect on the efficiency of the fan;
thirdly, the airflow will flow out of the movable blade with a high dynamic pressure, the instability of the flow of the discharged gas is high, and the air outlet side of the movable blade has a large energy loss, thereby also affecting the efficiency of the fan.
To sum up, the existing outdoor fan of the air conditioner at least has: the unsteady movable vane acting that influences of gaseous incoming flow, clearance leak the flow and cause movable vane acting loss big and fan running noise big and air outlet department air current instability is higher, influence the problem of fan efficiency, in addition, the vibration that the vortex produced is leaked in the clearance also can bring certain influence to the life-span of fan movable vane pivot etc..
Disclosure of Invention
The invention aims to provide a fan and an air duct system of an air conditioner outdoor unit, which at least relieve the following problems in the existing air conditioner outdoor unit: the technical problems that the working loss of the movable blades is large, the running noise of the fan is large, the airflow instability at the air outlet is high, and the efficiency of the fan is influenced are solved.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a fan, where the fan includes a casing, a movable blade, a front guide blade, and a rear guide blade, and the casing is provided with an air inlet and an air outlet; the movable blade is arranged in the shell and is rotatably arranged on a rotating shaft arranged in the shell, and the movable blade is positioned between the air inlet and the air outlet; the front guide vane is arranged in the shell, is positioned on the air inlet side of the movable vane and is used for guiding the airflow at the air inlet to the movable vane; the back stator is located the inside of casing, and is located the air-out side of movable vane, and with the extending direction of pivot before-mentioned as the axial, the back stator is used for the air current that flows out to the axial rectification with movable vane department.
In the technical scheme of the embodiment:
firstly, the airflow at the air inlet is guided to the movable blades by the front guide blades, the front guide blades form a longer airflow channel at the front parts of the movable blades, and even if a complex flow field exists at the air inlet of the casing, the airflow is rectified into a smoother airflow after passing through the front guide blade structure and then enters the movable blades by the front guide She Daoliu to do work, so that the working capacity of the movable blades is enhanced, and the efficiency of the fan is improved;
secondly, to the clearance leakage flow that the clearance between movable vane and the casing inner wall leads to and forms under the pressure differential drive of movable vane suction side (the air inlet side) and movable vane pressure side (the air-out side), owing to set up preceding stator, thereby, can rely on this preceding stator to carry out the rectification to the clearance leakage flow between movable vane and the casing inner wall, as the air current from fan air inlet department air inlet, form friction dissipation kinetic energy between air current and the preceding stator, kinetic energy constantly is supplemented from the clearance leakage flow again, make the clearance leakage flow prewhirl here at the preceding stator, total effect is for having consumed the kinetic energy of clearance leakage flow. Although the front guide vane in the fan casing can not completely eliminate all vortexes formed by the gap leakage flow on the pressure side (air outlet side) of the movable vane, the gap leakage flow can be decelerated so as to achieve the purpose of inhibiting the gap leakage flow, the front guide vane effectively inhibits gas from leaking to the pressure side (air outlet side) of the movable vane from the suction side (air inlet side) of the movable vane through the gap, the generation and development of the leakage vortexes on the pressure side (air outlet side) of the movable vane are effectively inhibited, the gap leakage loss is further reduced, the effective work of the movable vane is improved, the eddy noise is reduced, the vibration is reduced, when the vibration is reduced, the influence of the vibration generated by the gap leakage vortexes on the service life of the movable vane, the service life of a rotating shaft and the like of the fan can be reduced, and the service life of the fan is properly prolonged;
thirdly, when the movable blade rotates highly, the airflow is driven to flow out of the movable blade with high dynamic pressure, the rear guide blade can be utilized to convert the tangential speed of the airflow into more horizontal speed (axial speed of the rotating shaft), and huge dynamic pressure is converted into static pressure, so that the energy loss of the airflow on the air outlet side of the movable blade is reduced, and the efficiency of the fan is further improved.
When using this fan at air condensing units air duct system, just can alleviate among the outdoor fan of current air condensing units: the technical problems that the loss of the movable blade doing work is large, the running noise of the fan is large, the air flow instability at the air outlet is high, the efficiency of the fan is influenced and the service life of the fan is properly prolonged are solved.
The fan structure that provides according to this embodiment optimizes original fan, optimizes the back, and the original machine of fan is tested before with optimizing under the equal amount of wind, compares the power of consumption and the noise that produces to and the wind beam moves the law:
under the same air quantity, the power consumed by the improved fan is obviously lower than that consumed by the original fan, so that the efficiency of the improved fan is obviously improved;
under the same air quantity, the noise of the improved fan is obviously lower than that of the original fan, so that the improved fan has the effects of obviously reducing noise, reducing vibration and properly prolonging the service life;
it can be seen from the speed cloud cross-sectional view that under equal amount of wind, the fan after this application improvement's wind beam moves obviously more concentrated for original fan, and fan efficiency is higher.
According to the fan that the above-mentioned technical scheme of this embodiment provided, further, this fan can also have following additional technical feature:
in above-mentioned technical scheme, it is preferred comparatively, use the extending direction of pivot as direction of height to use the air inlet side to be low, use the air-out side to be the eminence: the axial height of the movable vane is L, and the axial distance between the highest point of the tail edge of the front guide vane and the tip of the movable vane is h 1 Then, the relation is satisfied: 0.05L<h 1 <L。
Further preferably, 0.05L<h 1 <0.7L。
In above-mentioned technical scheme, it is preferred comparatively, use the extending direction of pivot as direction of height to use the air inlet side to be low, use the air-out side to be the eminence: the axial height of the movable vane is L, and the axial distance between the front edge of the rear guide vane and the highest point of the tail edge of the movable vane is h 2 Then, the relation is satisfied: 0.1L<h 2 <L。
Further preferably, 0.1L<h 2 <0.5L。
In the above technical solution, preferably, the extending direction of the rotating shaft is taken as a height direction, the axial height of the movable blade is taken as L, and the axial height of the front guide vane is taken as L 1 Then, the relation is satisfied: 0.1L<L 1 <L。
In the above technical solution, preferably, the extending direction of the rotating shaft is taken as a height direction, the axial height of the movable blade is taken as L, and the axial height of the guide vane is taken as L 2 Then, the relation is satisfied: 0.15L<L 2 <0.8L。
In any of the above technical solutions, it is further preferable that the front guide vane and the rear guide vane are respectively long, and a plane where the plurality of front guide vane connecting lines are located and a plane where the plurality of rear guide vane connecting lines are located are perpendicular to an extending direction of the rotating shaft, respectively.
In any of the above technical solutions, it is further preferable that a projection of a leading edge line of the rear guide vane and a trailing edge line of the movable vane on any plane perpendicular to the rotation axis intersect; and the area where the airflow speed at the circular section with different radius of the flow field exceeds 50% of the maximum airflow speed is taken as the main flow area, and the angle formed by the intersection of the front edge line of the rear guide vane and the projection of the tail edge line of the movable vane on any plane vertical to the rotating shaft is theta, then the relation formula is satisfied in the main flow area: theta >20 deg.
In a second aspect, an embodiment of the present invention provides an air duct system of an outdoor unit of an air conditioner, where the air duct system of an outdoor unit of an air conditioner includes the fan provided in any one of the foregoing embodiments.
Drawings
In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required to be used in the description of the specific embodiments or the prior art, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, without creative work, other drawings can be obtained according to the drawings, taking the extending direction (i.e. axial direction) of the rotating shaft of the movable blade as the height direction, taking the air inlet side as the lower position, and taking the air outlet side as the higher position:
FIG. 1 is an isometric view of an overall configuration of a wind turbine provided in accordance with an embodiment of the present invention from a first perspective;
FIG. 2 is an isometric view of the overall structure of a wind turbine provided in accordance with an embodiment of the present invention from a second perspective;
fig. 3 is a view of the fan according to the embodiment of the present invention from the air inlet side to the air outlet side;
fig. 4 is a view of the fan provided by the embodiment of the present invention from the air outlet side to the air inlet side;
FIG. 5 is a side view of a wind turbine provided in accordance with an embodiment of the present invention;
FIG. 6 is a side cross-sectional view of a blower provided in accordance with an embodiment of the present invention;
FIG. 7 is a power comparison diagram of a fan and a normal fan provided by an embodiment of the present invention under the same air volume;
FIG. 8 is a noise contrast diagram of the blower fan according to the embodiment of the present invention and a conventional blower fan with the same air volume;
FIG. 9 is a sectional view of a wind current flowing speed cloud of a general fan;
fig. 10 is a sectional view of a wind current speed cloud of the fan provided in the embodiment of the present invention under the same wind volume as that in fig. 9.
Icon: 1-a machine shell; 2-moving blades; 21-a rotating shaft; 3-front guide vanes; 4-rear guide vane.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "front", "back", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "axial" does not imply that the components are required to be absolutely horizontal or overhanging, but rather may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example one
In an air conditioner outdoor unit, a fan air duct system directly influences the air quantity required by heat exchange of a heat exchanger, so that the running performance of the system is influenced.
The wind channel internally mounted of fan has the movable vane, leaves the clearance in order to ensure that the movable vane rotates the time fan safe operation between movable vane and the wind channel inner wall. When the air current flows through the clearance flow direction air outlet between movable vane and the wind channel inner wall from the air intake of fan:
firstly, if the incoming flow is rapid or unstable, a complex flow field may be formed at the air inlet of the air duct by the airflow, which affects the working of the movable blades and further affects the efficiency of the fan;
secondly, a gap between the movable blade and the inner wall of the air duct causes a gap leakage flow to be formed under the driving of the pressure difference between the suction side (air inlet side) of the movable blade and the pressure side (air outlet side) of the movable blade, the gap leakage flow is a very common phenomenon in the gas flow, a vortex structure is easy to appear in the vicinity of the gap and in a downstream flow field due to the existence of shear flow in the gap, and under the working conditions of relatively high partial flow velocity and relatively low pressure, a cavitation phenomenon caused by gap leakage often occurs, and the phenomenon can generate adverse effect on the efficiency of the fan, and the gap leakage flow forms a gap leakage vortex on the pressure side (air outlet side) of the movable blade, so that the movable blade does work to generate large gap leakage loss, and meanwhile, the air flow is not smooth and generates large noise;
thirdly, the air current will flow out the movable vane with higher dynamic pressure, and the gas flow's of exhaust instability is higher, has more energy loss at movable vane air-out side to also can influence the efficiency of fan.
To sum up, the outdoor fan of current air conditioner exists at least: the unsteady movable vane acting that influences of gaseous incoming flow, clearance leak the flow and cause movable vane acting loss big and fan running noise big and air outlet department air current instability is higher, influence the problem of fan efficiency, in addition, the vibration that the vortex produced is leaked in the clearance also can bring certain influence to the life-span of fan movable vane pivot etc..
In contrast, the present embodiment provides a fan to at least alleviate the above problems.
Specifically, referring to fig. 1 to 6, the original structure of the fan includes a casing 1 having an air inlet and an air outlet, and a movable blade 2 assembly disposed inside the casing 1, where the movable blade 2 assembly includes a rotating shaft 21 and a movable blade 2 rotatably mounted on the rotating shaft 21, and when the movable blade 2 rotates, the air from the air inlet of the casing 1 flows toward the air outlet of the casing 1; further, a front guide vane 3 and a rear guide vane 4 are arranged in the casing 1, so that the front guide vane 3 is arranged on the air inlet side of the movable vane 2 and used for guiding the air flow at the air inlet to the movable vane 2; the rear guide vane 4 is disposed on the air outlet side of the movable vane 2, and is configured to rectify the airflow flowing out of the movable vane 2 in the axial direction, i.e., in the extending direction of the rotating shaft 21.
In the technical scheme of the embodiment:
firstly, the front guide vane 3 is used for guiding airflow at an air inlet to the movable vane 2, the front guide vane 3 forms a longer airflow channel at the front part of the movable vane 2, even if a complex flow field exists at the air inlet of the casing 1, the airflow is rectified into smoother airflow after passing through the structure of the front guide vane 3 and then is guided by the front guide vane 3 to enter the movable vane 2 for acting, so that the acting capacity of the movable vane 2 is enhanced, and the fan efficiency is improved;
secondly, for the clearance leakage flow that the clearance between movable vane 2 and the casing 1 inner wall leads to and forms under the pressure differential drive of movable vane 2 suction side (the air inlet side) and movable vane 2 pressure side (the air outlet side), owing to set up preceding impeller 3, thereby, can rely on this preceding impeller 3 to carry out the rectification to the clearance leakage air current between movable vane 2 and the casing 1 inner wall, when the air current is from fan air inlet department air inlet, form friction dissipation kinetic energy between air current and the preceding impeller 3, kinetic energy constantly gets supplementarily from the clearance leakage flow again, make clearance leakage flow prewhirl at preceding stator 3 here, total effect is for having consumed the kinetic energy of clearance leakage flow. Although the front guide vane 3 in the fan casing 1 cannot completely eliminate all vortexes formed by gap leakage flow on the pressure side (air outlet side) of the movable vane 2, the gap leakage flow can be slowed down to achieve the purpose of inhibiting the gap leakage flow, the front guide vane 3 effectively inhibits gas from leaking from the suction side (air inlet side) of the movable vane 2 to the pressure side (air outlet side) of the movable vane 2 through gaps, effectively inhibits the generation and development of the leakage vortexes on the pressure side (air outlet side) of the movable vane 2, further reduces the gap leakage loss, improves the effective work of the movable vane 2, reduces the eddy noise and the vibration, and can reduce the influence of the vibration generated by the gap leakage vortexes on the service life of the movable vane 2, the rotating shaft 21 and the like of the fan when the vibration is reduced, and appropriately prolongs the service life of the fan;
thirdly, when the movable blade 2 rotates highly to drive the airflow to flow out of the movable blade 2 with high dynamic pressure, the rear guide blade 4 can be used to convert the tangential velocity of the airflow into more horizontal velocity (axial velocity of the rotating shaft 21) and convert the huge dynamic pressure into static pressure, so as to reduce the energy loss of the airflow on the air outlet side of the movable blade 2 and further improve the efficiency of the fan.
When using this fan at air condensing units air duct system, just can alleviate among the outdoor fan of current air condensing units: the technical problems that the working loss of the movable blade 2 is large, the running noise of the fan is large, the airflow instability at the air outlet is high, the efficiency of the fan is influenced and the service life of the fan is properly prolonged are solved.
The fan structure that provides according to this embodiment optimizes original fan, optimizes the back, and the former machine of fan is tested before optimizing under equal amount of wind, compares the power of consumption and the noise of production to and the wind beam law of flow, and the effect can refer to fig. 7 to 10 and obtain, specifically:
as shown in fig. 7, under the same air volume, the power consumed by the improved fan is obviously lower than the power consumed by the original fan, so that the efficiency of the improved fan is obviously improved;
as shown in fig. 8, under the same air volume, the noise of the improved fan is obviously lower than that of the original fan, so that the improved fan has the effects of obviously reducing noise, reducing vibration and properly prolonging the service life;
as shown in fig. 9 and fig. 10, it can be seen from the speed cloud cross-sectional view that, under the same air volume, the air flow of the improved fan is obviously more concentrated and the fan efficiency is higher compared with the original fan.
In addition, after the research of the applicant on the airflow flowing principle and the analysis of simulation experiment data, it is found that, for the above technical solution, the extending direction of the rotating shaft 21 is taken as the height direction, the air inlet side is taken as the lower part, and the air outlet side is taken as the higher part: the axial distance between the front guide vane 3 and the movable vane 2, the axial distance between the rear guide vane 4 and the movable vane 2, and the respective axial heights of the movable vane 2, the front guide vane 3 and the rear guide vane 4 are in a size relationship, which is very important for further improving the fan efficiency, the working capacity of the movable vane 2 and the silencing effect.
Based on this, referring to fig. 6, the applicant makes the following further improvements to the present technical solution:
based on the above technical solution of the present embodiment, it is further and more preferable that the axial height of the movable blade 2 is L, and the axial distance between the highest point of the trailing edge of the leading blade 3 and the tip of the movable blade 2 is h 1 Then, the relation is satisfied: 0.05L<h 1 <L。
Further preferably, 0.05L<h 1 <0.7L。
In the above technical solution, preferably, the axial height of the movable blade 2 is L, and the axial distance between the front edge of the rear guide vane 4 and the highest point of the tail edge of the movable blade 2 is h 2 Then, the relation is satisfied: 0.1L<h 2 <L。
Further preferably, 0.1L<h 2 <0.5L。
In the above technical solution, preferably, the axial height of the movable blade 2 is L, and the axial height of the front guide vane 3 is L 1 Then, the relation is satisfied: 0.1L<L 1 <L。
In the above technical solution, it is preferable that the axial height of the movable blade 2 is L, and the axial height of the following guide vane 4 is L 2 Then, the relation is satisfied: 0.15L<L 2 <0.8L。
In the technical scheme, the extension direction of the rotating shaft 21 is taken as the height direction, the air inlet side is taken as the lower position, the air outlet side is taken as the higher position, a series of size ranges are provided for the size relation among the axial distance between the front guide vane 3 and the movable vane 2, the axial distance between the rear guide vane 4 and the movable vane 2 and the size relation among the respective axial heights of the movable vane 2, the front guide vane 3 and the rear guide vane 4, and the ranges are selected according to a large number of data simulation tests by an applicant, so that the fan efficiency, the working capacity of the movable vane 2 and the silencing effect can be further improved.
In any of the above technical solutions, it is further preferable that the front guide vanes 3 and the rear guide vanes 4 are respectively long, and a plane where the connection lines of the plurality of front guide vanes 3 are located and a plane where the connection lines of the plurality of rear guide vanes 4 are located are respectively perpendicular to the extending direction of the rotating shaft 21. The strip-shaped front guide vane 3 is used for enabling the front guide vane 3 to form a long and narrow flow guide channel in front of the movable vane 2, and the air flow in front of the movable vane 2 (air inlet side) is better guided to be smooth enough; the long-strip-shaped rear guide vane 4 is used for enabling the rear guide vane 4 to form a long pressure relief channel at the rear part of the movable vane 2, so that the tangential speed of the airflow is more favorably converted into the horizontal axial speed.
Besides, in any of the above technical solutions, it is further preferable that the projection of the leading edge line of the rear guide vane 4 and the trailing edge line of the movable vane 2 on any plane perpendicular to the rotating shaft 21 intersect, that is, the leading edge line of the rear guide vane 4 and the trailing edge line of the movable vane 2 intersect in different planes, and the intersection state not only statically intersects but also dynamically intersects when the movable vane 2 rotates, that is, when the movable vane 2 rotates, the intersection point of the trailing edge line of each movable vane 2 and the different plane of the leading edge line of each rear guide vane 4 moves along the extending direction of the rear guide vane 4; and the area where the airflow velocity at the different radius circular cross section of the flow field exceeds 50% of the maximum airflow velocity is taken as the main flow area, as shown in fig. 4, the angle formed by the intersection of the front edge line of the rear guide vane 4 and the projection of the tail edge line of the movable vane 2 on any plane perpendicular to the rotating shaft 21 is θ, and then the relation formula is satisfied in the main flow area: theta >20 deg.
Specifically, the intersection angle of the leading edge line of the trailing vane 4 and the trailing edge line of the bucket 2 in the main flow region may be 25 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, or 90 degrees, or the like.
In the working process of the fan, the flow of the main flow area is strong, the intersection angle of the front edge line of the rear guide vane 4 and the tail edge line of the movable vane 2 in the main flow area is larger than 20 degrees, and the rectification effect of the airflow in the main flow area can be ensured.
In some embodiments, in the main flow region, the angle of intersection of the leading edge line of the trailing vane 4 with the trailing edge line of the bucket 2 in the main flow region varies along the direction of extension of the trailing vane 4 and is greater than 20 degrees.
In one technical solution of the embodiment of the present invention, an intersection angle of a leading edge line of the rear guide vane 4 and a trailing edge line of the bucket 2 in the main flow region is 90 degrees.
In the technical scheme, in the process of rotating the movable blades 2, the intersection point of the different surfaces of the tail edge line of each movable blade 2 and the front edge line of each rear guide blade 4 moves along the extension direction of the rear guide blade 4, and at each intersection point, the intersection angle of the front edge line of the rear guide blade 4 and the tail edge line of the movable blade 2 in the main flow area is 90 degrees, so that the rectification effect on the air flow is improved.
It should be noted that those skilled in the art should understand that: although the specific structure of the fan provided in the present embodiment is described in detail in the above alternative embodiments, the structure of the present embodiment is not limited thereto.
For example: for the axial distance between the front guide vane 3 and the movable vane 2 and the axial distance between the rear guide vane 4 and the movable vane 2
The distance and the size relation range among the axial heights of the movable vane 2, the front guide vane 3 and the rear guide vane 4 are the basic technical scheme of applying 5 to artificially further improve the fan efficiency, the working capacity of the movable vane 2 and the silencing effect, namely
Further improvements made on the basis of the technical solutions including the front guide vane 3 and the rear guide vane 4 are not shown, and the actual limitation of the range in the present application is actually that, even if other above-mentioned parameter data which are not within the selected range have good effects of improving the efficiency of the fan, the power-applying capability of the movable blade 2 and the silencing capability compared with the original fan, any parameter data can fall within the technical solution of the present application as long as the parameter data do not depart from the above-mentioned basic technical solutions in the present application.
0, the shapes of the front guide vane 3 and the rear guide vane 4, the leading edge line of the rear guide vane 4, and the moving blade 2
The technical scheme of the tail edge line out-of-plane intersection and the intersection angle range thereof is only an alternative scheme for further optimizing the rear guide vane 4 of the present application to further improve the fan efficiency, and is not a limitation to the present application, and even if the shapes of the front guide vane 3 and the rear guide vane 4 and the front edge line of the rear guide vane 4 and the tail edge line of the movable vane 2 are not out-of-plane intersection, the technical scheme of the present application should be exposed.
5 example two
The embodiment provides an air duct system of an air conditioner outdoor unit, as shown in fig. 1, the air duct system of the air conditioner outdoor unit includes a blower provided in any optional implementation manner of the embodiment, the blower includes a casing 1, a movable vane 2, a front guide vane 3 and a rear guide vane 4, the casing 1 is provided with an air inlet and an air outlet; the movable vane 2 is arranged in the casing 1 and is rotatably arranged on
A rotating shaft 21 and a movable blade 2 in the casing 1 are positioned between the air inlet and the air outlet; the front guide vane 3 is arranged inside the casing 10 and is positioned on the air inlet side of the movable vane 2 and used for guiding the airflow at the air inlet to the movable vane 2; the rear guide vane 4 is disposed inside the casing 1 and located on the air outlet side of the movable vane 2, and the rear guide vane 4 is configured to rectify the airflow flowing out of the movable vane 2 in the axial direction with the extending direction of the rotating shaft 21 as the axial direction.
Since the air duct system of the outdoor unit of the air conditioner provided by this embodiment includes the fan described in the first embodiment, this embodiment is not limited to this embodiment
The air duct system of the outdoor unit of the air conditioner can achieve all the advantages achieved by the air conditioner in the first embodiment, and the specific structure and the achieved effects of the air duct system 5 can be obtained by referring to optional or preferred embodiments in the first embodiment.
Finally, it should be noted that: 1. the fans provided by the embodiments in the description of the present application can be applied not only to the air duct system of the outdoor fan of the air conditioner, but also to the air duct systems in other fields, and the background technology and the specific implementation mode in the description are only exemplified by the application to the air duct system of the outdoor fan of the air conditioner;
2. the embodiments in the present specification are all described in a progressive manner, each embodiment focuses on the difference between 0 and the other embodiments, and the same and similar parts among the embodiments can be referred to each other; the above embodiments in the present specification are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A fan, comprising:
the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with an air inlet and an air outlet;
the movable blade is arranged in the shell and is rotatably arranged on a rotating shaft arranged in the shell, and the movable blade is positioned between the air inlet and the air outlet;
the front guide vane is arranged in the shell, is positioned on the air inlet side of the movable vane and is used for guiding the airflow at the air inlet to the movable vane;
and the rear guide vane is arranged in the casing and positioned on the air outlet side of the movable vane, the extension direction of the rotating shaft is axial, and the rear guide vane is used for rectifying the airflow flowing out of the movable vane to the axial direction.
2. The fan according to claim 1, wherein the extending direction of the rotating shaft is taken as the height direction, the air inlet side is taken as the lower position, and the air outlet side is taken as the higher position:
the axial height of the movable vane is L, and the axial distance between the highest point of the tail edge of the front guide vane and the tip of the movable vane is h 1 Then, the relation is satisfied: 0.05L<h 1 <L。
3. The fan of claim 2 wherein 0.05L<h 1 <0.7L。
4. The fan according to claim 1, wherein the extending direction of the rotating shaft is taken as the height direction, the air inlet side is taken as the lower position, and the air outlet side is taken as the higher position:
the axial height of the movable vane is L, and the axial distance between the front edge of the rear guide vane and the highest point of the tail edge of the movable vane is h 2 Then, the relation is satisfied: 0.1L<h 2 <L。
5. The fan of claim 4 wherein 0.1L<h 2 <0.5L。
6. The fan as claimed in claim 1, wherein the extending direction of the rotating shaft is taken as a height direction, the axial height of the movable blade is taken as L, and the axial height of the front guide vane is taken as L 1 Then the relation is satisfied: 0.1L<L 1 <L。
7. The fan as claimed in claim 1, wherein the extending direction of the rotating shaft is taken as a height direction, the axial height of the movable blade is taken as L, and the axial height of the rear guide vane is taken as L 2 Then, the relation is satisfied: 0.15L<L 2 <0.8L。
8. The fan according to any one of claims 1 to 5, wherein the front guide vane and the rear guide vane are respectively long, and a plane on which a plurality of front guide vane lines are located and a plane on which a plurality of rear guide vane lines are located are respectively perpendicular to an extending direction of the rotating shaft.
9. The wind turbine of any of claims 1-5, wherein a projection of a leading edge line of the trailing guide vane and a trailing edge line of the bucket on any plane perpendicular to the shaft intersects; and taking a region where the airflow speed at the circular sections with different radiuses of the flow field exceeds 50% of the maximum airflow speed as a main flow region, and taking the angle formed by the intersection of the front edge line of the rear guide vane and the projection of the tail edge line of the movable vane on any plane perpendicular to the rotating shaft as theta, the relation formula is satisfied in the main flow region: theta >20 deg.
10. An outdoor unit duct system of an air conditioner, comprising the blower fan according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211543132.XA CN115807791A (en) | 2022-12-02 | 2022-12-02 | Fan and air condensing units air duct system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211543132.XA CN115807791A (en) | 2022-12-02 | 2022-12-02 | Fan and air condensing units air duct system |
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| Publication Number | Publication Date |
|---|---|
| CN115807791A true CN115807791A (en) | 2023-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211543132.XA Pending CN115807791A (en) | 2022-12-02 | 2022-12-02 | Fan and air condensing units air duct system |
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| CN (1) | CN115807791A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113984A1 (en) * | 2022-12-02 | 2024-06-06 | 广东美的暖通设备有限公司 | Fan, outdoor air-conditioning unit, and air-conditioning system |
-
2022
- 2022-12-02 CN CN202211543132.XA patent/CN115807791A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113984A1 (en) * | 2022-12-02 | 2024-06-06 | 广东美的暖通设备有限公司 | Fan, outdoor air-conditioning unit, and air-conditioning system |
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