CN216199223U - Centrifugal fan impeller and air conditioner - Google Patents
Centrifugal fan impeller and air conditioner Download PDFInfo
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- CN216199223U CN216199223U CN202122678829.5U CN202122678829U CN216199223U CN 216199223 U CN216199223 U CN 216199223U CN 202122678829 U CN202122678829 U CN 202122678829U CN 216199223 U CN216199223 U CN 216199223U
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Abstract
The utility model discloses a centrifugal fan impeller and an air conditioner, and relates to the technical field of air conditioners. The centrifugal fan impeller comprises a wheel disc and a plurality of fan blades. The fan blades are arranged in the wheel disc in an annular array mode, each fan blade is provided with a flange side, a front edge side, a concave edge side and a rear edge side which are connected end to end, the rear edge side is connected with the wheel disc, the cross section of the concave edge side is arc-shaped, and the cross section of the flange side is a fitting curve formed by sequentially connecting four sections of curves or straight lines. Compared with the prior art, the centrifugal fan impeller provided by the utility model adopts the concave edge side arranged in an arc shape and the convex edge side arranged in a fitting curve, so that the generated noise can be reduced, the air volume loss is reduced, the air volume is increased, the air outlet effect is improved, and the user experience is improved.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to a centrifugal fan impeller and an air conditioner.
Background
At present, in the application of an air conditioner, a centrifugal fan is generally used for driving air to flow so as to form an air outlet flow, and then a heat exchanger is used for exchanging heat with the air outlet flow so as to realize the heating or refrigerating function. Most impeller among present centrifugal fan adopt the preceding form of multi-wing, and the fan blade is along thickness or no change law such as chord length direction, so, at the in-process of centrifugal fan air-out, impeller wherein high-speed rotatory can arouse surrounding gas pressure pulsation, and atmospheric pressure acts on the worm shell part and forms the noise to can cause certain amount of wind loss, lead to the air output to reduce, air-out efficiency reduces, influences user experience.
SUMMERY OF THE UTILITY MODEL
The utility model solves the problems of reducing the generated noise, reducing the air quantity loss, increasing the air quantity, improving the air outlet effect and improving the user experience.
In order to solve the above problems, the technical solution of the present invention is realized as follows:
in a first aspect, the utility model provides a centrifugal fan impeller, which comprises a wheel disc and a plurality of fan blades, wherein the fan blades are arranged in the wheel disc in an annular array, the fan blades are provided with a flange side, a front edge side, a concave edge side and a rear edge side which are connected end to end, the rear edge side is connected with the wheel disc, the cross section of the concave edge side is in an arc shape, the cross section of the flange side is a fitting curve formed by sequentially connecting four sections of curves or straight lines, and the function relationship of the fitting curve is as follows:
wherein, the unit of x is the millimeter, and the direction of x axle direction for being located the both ends of fan blade pitch arc line on the line and from the leading edge side to the trailing edge side, the direction of y axle is perpendicular to x axle and from the direction of concave edge side to flange side, and the initial point is the nodical of the pitch arc line of fan blade and leading edge side. Compared with the prior art, the centrifugal fan impeller provided by the utility model adopts the concave edge side arranged in an arc shape and the convex edge side arranged in a fitting curve, so that the generated noise can be reduced, the air volume loss is reduced, the air volume is increased, the air outlet effect is improved, and the user experience is improved.
Further, when x is 2.5, the distance between the concave edge side and the convex edge side is the largest, and the thickness of the fan blade is the largest. The thickness of the fan blade is gradually increased and then gradually reduced in the x-axis direction, so that airflow flowing through the fan blade is diffused outwards towards the two sides of the fan blade and then approaches the flange side along the concave edge side and the flange side, air resistance is reduced, and air outlet efficiency is improved.
Further, the central angle of the arc formed by the concave edge side ranges from 90 degrees to 110 degrees. The reasonable central angle of the concave edge side can ensure that the concave edge side has enough arc length to guide air when being convenient for processing and production, thereby improving the air guide effect and reducing the generated noise.
Further, the number of the fan blades ranges from 42 to 45. The reasonable fan blade number can reduce the noise as far as possible while guaranteeing the air output.
Furthermore, an inlet mounting angle is formed between a circle which takes the middle point of the wheel disc as the center of the circle and passes through the origin and the pitch arc of the fan blade, and the range of the inlet mounting angle is 65-75 degrees. The reasonable inlet installation angle can ensure the air output and effectively improve the static pressure ratio and the isentropic efficiency of the fan blades.
Further, an outlet mounting angle is formed between a circle which takes the middle point of the wheel disc as the center of the circle and passes through the intersection point of the fan blade middle arc line and the rear edge side and the fan blade middle arc line, and the range of the outlet mounting angle is 160-175 degrees. Reasonable outlet installation angle can effectively increase air output, improve air-out efficiency to reduce the noise of production.
Further, the difference between the outlet setting angle and the inlet setting angle ranges from 90 degrees to 105 degrees. The reasonable difference value between the outlet mounting angle and the inlet mounting angle can reduce the generated noise as far as possible while ensuring the air outlet effect, and is convenient for processing the impeller of the centrifugal fan.
Further, the cross section of the front edge side is arc-shaped, and the radius of the arc of the front edge side ranges from 0.5 mm to 0.7 mm. The reasonable radius of the arc on the front edge side can ensure the air guide effect and simultaneously reduce the air resistance to the maximum extent.
Further, a ratio of a diameter of a circle centered on the center point of the wheel disc and passing through the origin to an outer diameter of the wheel disc ranges from 0.78 to 0.85. Reasonable wheel diameter ratio can increase air output, improve air output efficiency and reduce generated noise.
In a second aspect, the present invention provides an air conditioner, including the centrifugal fan impeller described above, where the centrifugal fan impeller includes a wheel disc and a plurality of fan blades, the plurality of fan blades are arranged in the wheel disc in an annular array, the fan blades are provided with a flange side, a leading edge side, a concave edge side and a trailing edge side which are connected end to end, the trailing edge side is connected with the wheel disc, the cross section of the concave edge side is in an arc shape, the cross section of the flange side is a fitting curve formed by sequentially connecting four sections of curves or straight lines, and the function relationship of the fitting curve is:
wherein, the unit of x is the millimeter, and the direction of x axle direction for being located the both ends of fan blade pitch arc line on the line and from the leading edge side to the trailing edge side, the direction of y axle is perpendicular to x axle and from the direction of concave edge side to flange side, and the initial point is the nodical of the pitch arc line of fan blade and leading edge side. The air conditioner can reduce the noise of production, reduces the amount of wind loss, and the increase air output improves the air-out effect, promotes user experience.
Drawings
FIG. 1 is an axial side view of a centrifugal fan impeller according to a first embodiment of the present invention;
FIG. 2 is a front view of a centrifugal fan impeller according to a first embodiment of the present invention;
fig. 3 is a schematic structural view of a connection between a wheel disc and fan blades in an impeller of a centrifugal fan according to a first embodiment of the present invention;
fig. 4 is a mathematical model diagram of the connection between the wheel disc and the fan blade of the centrifugal fan impeller according to the first embodiment of the present invention;
FIG. 5 is a mathematical model of the flange side of a fan blade in a centrifugal fan impeller according to a first embodiment of the present invention;
fig. 6 is another mathematical model diagram of the connection between the wheel disc and the fan blade in the centrifugal fan impeller according to the first embodiment of the utility model;
FIG. 7 is a mathematical model diagram of a centrifugal fan impeller according to a first embodiment of the present invention;
FIG. 8 is a top plan view of a centrifugal fan impeller according to a first embodiment of the present invention;
fig. 9 is a schematic structural diagram of a centrifugal fan impeller according to a first embodiment of the present invention, in which a first fan blade and a second fan blade are arranged in a staggered manner.
Description of reference numerals:
100-centrifugal fan impeller; 110-a wheel disc; 111-a first wheel; 112-a second wheel; 120-fan blades; 121-flange side; 122-leading edge side; 123-the concave edge side; 124-trailing edge side; 125-a first fan blade; 126-second fan blades.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
First embodiment
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a centrifugal fan impeller 100 for generating negative pressure to drive air to flow to form an outlet airflow. Its noise that can reduce the production reduces the amount of wind loss, and the increase air output improves the air-out effect, promotes user experience.
It should be noted that the centrifugal fan impeller 100 is applied to a centrifugal fan (not shown), and the centrifugal fan includes a driving motor (not shown) and the centrifugal fan impeller 100. The driving motor is in transmission connection with the centrifugal fan impeller 100, and the driving motor can drive the centrifugal fan impeller 100 to rotate, so that the centrifugal fan impeller 100 generates negative pressure and drives air to flow to form air outlet flow.
Referring to fig. 3, 4 and 5, the centrifugal fan impeller 100 includes a wheel disc 110 and a plurality of blades 120. The wheel disc 110 is disposed in an annular shape, the plurality of blades 120 are disposed in the wheel disc 110 in an annular array, and the plurality of blades 120 act together to drive the air to flow to form an outlet airflow. The fan blades 120 are bent to guide air, reduce air resistance and improve air outlet efficiency. Specifically, the fan blade 120 is provided with a flange side 121, a leading edge side 122, a concave edge side 123 and a trailing edge side 124 which are connected end to end, the trailing edge side 124 is connected with the wheel disc 110, the concave edge side 123 is the side where the fan blade 120 is recessed inwards, the flange side 121 is the side where the fan blade 120 protrudes outwards, and the leading edge side 122 is the side where the fan blade 120 is far away from the wheel disc 110. The cross section of the concave edge side 123 is arc-shaped, and the cross section of the convex edge side 121 is a fitting curve formed by sequentially connecting four sections of curves or straight lines.
It is worth noting that the central angle range of the arc of the concave edge side 123 is 90 degrees to 110 degrees, and the reasonable central angle of the concave edge side 123 can facilitate processing and production while ensuring that the concave edge side 123 has enough arc length to guide air, thereby improving the air guiding effect and reducing the generated noise. For ease of understanding, the arc of the rim side 123 is denoted as ab segment, and the central angle of the arc of the rim side 123 is denoted as A. In this embodiment, the central angle of the arc of the concave edge side 123 is 100 degrees, but the utility model is not limited thereto, and in other embodiments, the central angle of the arc of the concave edge side 123 may be 90 degrees or 110 degrees, and the size of the central angle of the arc of the concave edge side 123 is not particularly limited.
It should be noted that the functional relationship of the fitted curve formed by the cross section of the flange side 121 is:
the unit of x is millimeter, the x-axis direction is a direction from the leading edge side 122 to the trailing edge side 124 on a connecting line of two ends of a camber line of the fan blade 120, the y-axis direction is a direction perpendicular to the x-axis from the concave edge side 123 to the flange side 121, and the origin is an intersection point of the camber line of the fan blade 120 and the leading edge side 122. For ease of understanding, the origin is denoted as the o-point.
Specifically, as can be seen from the functional relationship, the cross section of the flange side 121 includes a first curved section, a second curved section, a third curved section and a straight section, which are sequentially connected, wherein the first curved section is far away from the wheel disc 110, the straight section is close to the wheel disc 110, the cross section of the entire flange side 121 is in a shape similar to a parabola, so that the flange side can better adapt to the change of a flow field, and the air resistance is smaller. For ease of understanding, the first curve segment is denoted as the cd segment, the second curve segment is denoted as the de segment, the third curve segment is denoted as the ef segment, and the straight line segment is denoted as the fg segment. In the process of air outlet of the centrifugal fan impeller 100, the air flow flows from the first curve section to the second curve section and the third curve section in sequence on the flange side 121 and flows towards the direction of the straight line section, so that the surface of the flange side 121 has better flow velocity distribution, separation and development of an air separation layer on the surface of the fan blade 120 are improved, air resistance is effectively reduced, air outlet efficiency is improved, vortex noise in a volute component is reduced, and flow field distribution is more uniform.
In this embodiment, the flange side 121 is an eccentric structure, and the thickness of the fan blade 120 gradually increases and then gradually decreases in the x-axis direction, so that the airflow flowing through the fan blade 120 is firstly diffused outward to the two sides of the fan blade 120, and then approaches each other along the flange side 121 and the recess side 123, thereby reducing air resistance and improving air outlet efficiency. When x is 2.5, the distance between the concave edge side 123 and the flange side 121 is the largest, and the thickness of the fan blade 120 is the largest; when x is 5, the value of y is the largest, and the distance between the flange side 121 and the connecting line of the two ends of the camber line of the fan blade 120 is the largest.
In this embodiment, the cross section of the front edge side 122 is arc-shaped, so as to guide the air flow to the concave edge side 123 and the convex edge side 121 respectively, reduce the air resistance, and improve the air guiding effect. It will be appreciated that the arc of the leading edge side 122 is shown as an ac segment, i.e., a partial contour line interconnecting the rim side 123 and the flange side 121 at an end remote from the wheel disc 110; the trailing edge side 124 is shown as an arc as a bg segment, i.e., a part line where the concave edge side 123 and the flange side 121 join each other near one end of the wheel disc 110.
Further, the radius of the arc of the leading edge side 122 ranges from 0.5 mm to 0.7 mm, and the reasonable radius of the arc of the leading edge side 122 can reduce the air resistance to the maximum extent while ensuring the air guiding effect. For ease of understanding, the radius of the arc of the leading edge side 122 is denoted as R. In this embodiment, the radius of the arc of the leading edge side 122 is 0.6 mm, but the utility model is not limited thereto, and in other embodiments, the radius of the arc of the leading edge side 122 may be 0.5 mm or 0.7 mm, and the size of the radius of the arc of the leading edge side 122 is not particularly limited.
It should be noted that, the number range of the fan blades 120 is 42 to 45, and the reasonable number of the fan blades 120 can reduce the generated noise as much as possible while ensuring the air output. In this embodiment, the number of the fan blades 120 is 43, but is not limited thereto, and in other embodiments, the number of the fan blades 120 may be 42 or 45, and the number of the fan blades 120 is not particularly limited.
Referring to fig. 6, it should be noted that an inlet setting angle is formed between a circle which takes the midpoint of the wheel disc 110 as the center point and passes through the origin point and the camber line of the fan blade 120, that is, an inlet setting angle is formed between the tangent of the circle at the origin point and the tangent of the camber line of the fan blade 120 at the origin point. Specifically, the range of the inlet installation angle is 65 degrees to 75 degrees, and the reasonable inlet installation angle can effectively improve the static pressure ratio and the isentropic efficiency of the fan blades 120 while ensuring the air output. For ease of understanding, the inlet mounting angle is denoted as B. In this embodiment, the inlet installation angle is 90 degrees, but the utility model is not limited thereto, and in other embodiments, the inlet installation angle may be 65 degrees or 75 degrees, and the size of the inlet installation angle is not particularly limited.
Further, an exit setting angle is formed between a circle, which takes the midpoint of the wheel disc 110 as the center of a circle and passes through the intersection point of the camber line of the fan blade 120 and the trailing edge side 124, and the camber line of the fan blade 120, that is, an exit setting angle is formed between a tangent of the circle at the intersection point and a tangent of the camber line of the fan blade 120 at the intersection point. Specifically, the range of export erection angle is 160 degrees to 175 degrees, and reasonable export erection angle can effectively increase the air output, improves air-out efficiency to the noise that reduces the production. For ease of understanding, the outlet mounting angle is denoted as C. In this embodiment, the outlet installation angle is 168 degrees, but the utility model is not limited thereto, and in other embodiments, the outlet installation angle may be 160 degrees or 175 degrees, and the size of the outlet installation angle is not particularly limited.
It should be noted that, the difference range between the outlet installation angle and the inlet installation angle is 90 degrees to 105 degrees, and the difference between the reasonable outlet installation angle and the inlet installation angle can reduce the generated noise as much as possible while ensuring the air outlet effect, and is convenient for the processing of the centrifugal fan impeller 100. In this embodiment, the difference between the outlet installation angle and the inlet installation angle is 98 degrees, but the utility model is not limited thereto, and in other embodiments, the difference between the outlet installation angle and the inlet installation angle may be 90 degrees or 105 degrees, and the magnitude of the difference between the outlet installation angle and the inlet installation angle is not particularly limited.
Referring to fig. 7, it is noted that the ratio of the diameter of the circle passing through the origin and the center point of the wheel disc 110 to the outer diameter of the wheel disc 110 is in the range of 0.78 to 0.85, that is, the wheel diameter ratio of the centrifugal fan impeller 100 is in the range of 0.78 to 0.85, and the reasonable wheel diameter ratio can increase the air output, improve the air output efficiency, and reduce the generated noise. For ease of understanding, the diameter of a circle centered at the center of the wheel disc 110 and passing through the origin is denoted as D and the outer diameter of the wheel disc 110 is denoted as E. In the present embodiment, the wheel diameter ratio of the centrifugal fan impeller 100 is 0.82, but the present invention is not limited thereto, and in other embodiments, the wheel diameter ratio of the centrifugal fan impeller 100 may be 0.78 or 0.85, and the size of the wheel diameter ratio of the centrifugal fan impeller 100 is not particularly limited.
Referring to fig. 8 and 9, the fan blades 120 include a first fan blade 125 and a second fan blade 126. The number of the first fan blades 125 and the number of the second fan blades 126 are both multiple, and the multiple first fan blades 125 and the multiple second fan blades 126 are both arranged in the wheel disc 110. Specifically, the first fan blade 125 and the second fan blade 126 are the same in shape, and the first fan blade 125 and the second fan blade 126 are arranged in a staggered manner, and the staggered first fan blade 125 and the staggered second fan blade 126 can effectively improve the air outlet efficiency of the centrifugal fan impeller 100 and increase the air outlet volume.
The wheel disc 110 includes a first wheel disc 111 and a second wheel disc 112 that are coaxially disposed. The diameters of the first wheel disc 111 and the second wheel disc 112 are equal, the plurality of first fan blades 125 are arranged in the first wheel disc 111 in an annular array, and the plurality of second fan blades 126 are arranged in the second wheel disc 112 in an annular array. In the process that the driving motor drives the centrifugal fan impeller 100 to rotate, the first wheel disc 111 and the second wheel disc 112 rotate synchronously to drive the first fan blade 125 and the second fan blade 126 to move, so as to realize the air outlet function.
Further, in the circumferential direction of the wheel disc 110, a ratio range of an angle of the first fan blade 125 rotating to a position where the second fan blade 126 is adjacent to the first fan blade 125 to an angle of the second fan blade 126 rotating to a position where the first fan blade 125 is adjacent to the second fan blade is 0.5 to 0.7, that is, on the cross section of the centrifugal fan impeller 100, one second fan blade 126 is located between two adjacent first fan blades 125, wherein a ratio range of an included angle between the first fan blade 125 and the second fan blade 126 to an included angle between the second fan blade 126 and the second first fan blade 125 is 0.5 to 0.7. Specifically, the included angle ratio is called as the staggered tooth ratio of the centrifugal fan impeller 100, and the reasonable staggered tooth ratio can effectively improve the air outlet efficiency and reduce the wind noise. For convenience of understanding, an angle of the first fan 125 rotating to a position where an adjacent second fan 126 is located is denoted as F, and an angle of the second fan 126 rotating to a position where an adjacent first fan 125 is located is denoted as G.
In this embodiment, the staggered tooth ratio is 0.6, that is, in the circumferential direction of the wheel disc 110, the ratio of the angle at which the first blade 125 rotates to the position of the adjacent second blade 126 to the angle at which the second blade 126 rotates to the position of the adjacent first blade 125 is 0.6, but not limited thereto, in other embodiments, the staggered tooth ratio may be 0.5 or 0.7, and the size of the staggered tooth ratio is not particularly limited.
In this embodiment, the distance between two adjacent first blades 125 is equal to the distance between two adjacent second blades 126, that is, the number of the first blades 125 in the first wheel disc 111 is equal to the number of the second blades 126 in the second wheel disc 112. Specifically, the distance between two adjacent first fan blades 125 is 9.5 mm to 10.5 mm, and the air output can be increased as much as possible while the air guiding effect is ensured by the reasonable distance between two adjacent first fan blades 125. For ease of understanding, the spacing between two adjacent first fan blades 125 is denoted as H. In this embodiment, the distance between two adjacent first blades 125 is 9.9 mm, but not limited thereto, in other embodiments, the distance between two adjacent first blades 125 may be 9.5 mm, or 10.5 mm, and the size of the distance between two adjacent first blades 125 is not particularly limited.
In the centrifugal fan impeller 100 according to the embodiment of the present invention, the plurality of blades 120 are disposed in the wheel disc 110 in an annular array, the blades 120 are provided with a flange side 121, a leading edge side 122, a concave edge side 123 and a trailing edge side 124 which are connected end to end, the trailing edge side 124 is connected to the wheel disc 110, the cross section of the concave edge side 123 is in an arc shape, the cross section of the flange side 121 is a fitting curve formed by sequentially connecting four sections of curves or straight lines, and a function relationship of the fitting curve is:
the unit of x is millimeter, the x-axis direction is a direction from the leading edge side 122 to the trailing edge side 124 on a connecting line of two ends of a camber line of the fan blade 120, the y-axis direction is a direction perpendicular to the x-axis from the concave edge side 123 to the flange side 121, and the origin is an intersection point of the camber line of the fan blade 120 and the leading edge side 122. Compared with the prior art, the centrifugal fan impeller 100 provided by the utility model adopts the concave edge side 123 arranged in an arc shape and the flange side 121 arranged in a fitting curve, so that the generated noise can be reduced, the air volume loss is reduced, the air volume is increased, the air outlet effect is improved, and the user experience is improved.
Second embodiment
The present invention provides an air conditioner (not shown) for regulating indoor air temperature. The air conditioner includes a heat exchanger (not shown) and a centrifugal fan including a driving motor and a centrifugal fan impeller 100, the driving motor being connected to the centrifugal fan impeller 100. The basic structure and principle of the centrifugal fan impeller 100 and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, no part of this embodiment is mentioned, and reference may be made to the corresponding contents in the first embodiment.
In this embodiment, the position of the heat exchanger corresponds to the position of the centrifugal fan. When the air conditioner operates, the driving motor can drive the centrifugal fan impeller 100 to rotate so as to generate negative pressure and drive air to flow to form air outlet flow, the air outlet flow can penetrate through the heat exchanger and is blown to the indoor, and in the process, the heat exchanger can heat or refrigerate the air outlet flow so as to realize the function of regulating and controlling the indoor temperature.
The beneficial effects of the air conditioner according to the embodiment of the present invention are the same as those of the first embodiment, and are not described herein again.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The utility model provides a centrifugal fan impeller, its characterized in that, includes rim plate (110) and a plurality of fan blade (120), and is a plurality of fan blade (120) be annular array ground set up in rim plate (110), fan blade (120) are provided with flange side (121), leading edge side (122), concave edge side (123) and trailing edge side (124) end to end, trailing edge side (124) with rim plate (110) are connected, the cross section of concave edge side (123) is circular-arcly personally submitted, the cross section of flange side (121) is the fitting curve that four sections curve or straight line connected gradually formed, the function relation of fitting curve is:
the unit of x is millimeter, the x-axis direction is located on the connecting line of the two ends of the pitch arc of the fan blade (120) and the direction from the front edge side (122) to the rear edge side (124), the y-axis direction is perpendicular to the x-axis and the direction from the concave edge side (123) to the convex edge side (121), and the origin is the intersection point of the pitch arc of the fan blade (120) and the front edge side (122).
2. The centrifugal fan impeller according to claim 1, wherein the distance between the concave edge side (123) and the convex edge side (121) is the largest and the thickness of the fan blade (120) is the largest when x is 2.5.
3. The centrifugal fan impeller according to claim 1, wherein the central angle of the arc of the rim side (123) ranges from 90 degrees to 110 degrees.
4. The centrifugal fan impeller according to claim 1, wherein the number of the fan blades (120) ranges from 42 to 45.
5. The centrifugal fan impeller of claim 1, wherein an inlet setting angle is formed between a circle which takes a midpoint of the wheel disc (110) as a center point and passes through the origin and a camber line of the fan blade (120), and the inlet setting angle ranges from 65 degrees to 75 degrees.
6. The centrifugal fan impeller of claim 5, wherein an outlet setting angle is formed between a circle centered at a midpoint of the wheel disc (110) and passing through an intersection of the fan blade (120) mean camber line and the trailing edge side (124) and the fan blade (120) mean camber line, the outlet setting angle ranging from 160 degrees to 175 degrees.
7. The centrifugal fan impeller of claim 6 wherein the difference between the outlet setting angle and the inlet setting angle is in the range of 90 degrees to 105 degrees.
8. The centrifugal fan impeller of claim 1, wherein the leading edge side (122) has a circular arc cross-section, the circular arc of the leading edge side (122) having a radius in the range of 0.5 mm to 0.7 mm.
9. The centrifugal fan impeller of claim 1, wherein the ratio of the diameter of a circle centered at the midpoint of the disk (110) and passing through the origin to the outer diameter of the disk (110) ranges from 0.78 to 0.85.
10. An air conditioner characterized by comprising a centrifugal fan impeller according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122678829.5U CN216199223U (en) | 2021-11-03 | 2021-11-03 | Centrifugal fan impeller and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122678829.5U CN216199223U (en) | 2021-11-03 | 2021-11-03 | Centrifugal fan impeller and air conditioner |
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| CN216199223U true CN216199223U (en) | 2022-04-05 |
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| CN202122678829.5U Active CN216199223U (en) | 2021-11-03 | 2021-11-03 | Centrifugal fan impeller and air conditioner |
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| CN (1) | CN216199223U (en) |
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2021
- 2021-11-03 CN CN202122678829.5U patent/CN216199223U/en active Active
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221011 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: NINGBO AUX ELECTRIC Co.,Ltd. Patentee after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315000 No.1166 Mingguang North Road, Jiangshan Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX ELECTRIC Co.,Ltd. Patentee before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |
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| TR01 | Transfer of patent right |