Heat pump fan blade and integral heat pump
By setting the flange with gradually increasing width on the top of the heat pump blade, the problem of high noise in the existing heat pump blade is solved, achieving lower noise and higher efficiency.
Patent Information
- Application Number
- CN202311413978.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-27
- Publication Date
- 2025-05-06
AI Technical Summary
The existing heat pump air blades will form larger leakage vortex during the working process, resulting in greater noise and affecting the user experience.
A heat pump air blade is designed, with a flange on the top of the leaf, and the width of the flange gradually increases from the tip of the leaf to the tail, reducing leakage vortex and reducing noise.
By reducing the leakage vortex, lower noise levels are achieved, and the efficiency of the wind blades is further improved by enhancing the wind breaking effect.
Smart Images
Figure CN119934077A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of heat pumps, and in particular to a heat pump fan blade and an integrated heat pump. Background Art
[0002] At present, the fan blades equipped in the heat pumps on the market have flat blade tops. During operation, there is a large pressure difference between the pressure side and the suction side of the blade, which will form a large leakage vortex and generate loud noise, affecting the user experience. Summary of the invention
[0003] The problem solved by the present invention is that the existing heat pump fan blades will form a large leakage vortex, thereby generating a large noise.
[0004] In order to solve the above problems, the present invention provides a heat pump fan blade, which has the characteristics of smaller leakage vortex and lower noise.
[0005] The embodiment of the present invention provides a technical solution:
[0006] A heat pump fan blade comprises a mounting portion and a plurality of blades arranged on the periphery of the mounting portion, wherein the blade tops are provided with flanges, and the width of the flanges gradually increases from one end connected to the leading edge of the blades to one end connected to the trailing edge of the blades.
[0007] The heat pump fan blade provided by the embodiment of the present invention has a flange on the blade top that can reduce leakage vortices, thereby reducing noise. In addition, the width of the flange gradually increases from the end connected to the leading edge of the blade to the end connected to the trailing edge, further reducing the wind cutting area and enhancing the wind breaking effect, thereby achieving a better noise reduction effect.
[0008] In an optional embodiment, the width of the flange increases from 0 mm to 25 mm from the end connected to the leading edge of the blade to the end connected to the trailing edge of the blade.
[0009] Preferably, the width of the flange is increased from 0 mm to 25 mm, which can achieve the best wind-breaking effect and thus reduce noise to the greatest extent.
[0010] In an optional embodiment, the angle between the flange and the blade gradually increases from the end connected to the leading edge of the blade to the end connected to the trailing edge of the blade.
[0011] From the end connected to the leading edge of the blade to the end connected to the trailing edge, the upward curvature of the flange gradually increases, adapting to the different pressure differences at different positions on the blade top from the leading edge to the trailing edge, achieving adaptive reduction of leakage vortices at different positions, and obtaining better noise reduction effects.
[0012] In an optional embodiment, from an end connected to the leading edge of the blade to an end connected to the trailing edge of the blade, the angle between the flange and the blade increases from 0° to 25°.
[0013] Preferably, the flange is increased from an upward angle of 0° to 25° compared to the blade, so that the wind cutting area at the blade tip is minimized, thereby minimizing noise.
[0014] In an optional embodiment, a reinforcing rib connected to the mounting portion is provided on one side surface of the blade, and the reinforcing rib smoothly transitions to the surface of the blade.
[0015] Providing a smoothly transitioned reinforcing rib only on one side of the blade surface can improve the strength of the reinforcing rib while avoiding airflow separation on both sides of the blade.
[0016] In an optional embodiment, a radius of a rotation trajectory of one end of the flange connected to the leading edge is greater than a radius of a rotation trajectory of one end of the flange connected to the trailing edge.
[0017] The rotation radius of the flange gradually decreases from the end connected to the leading edge to the end connected to the trailing edge, thereby preventing the rotation radius of the blade near the trailing edge from being too large and affecting the smooth installation of the heat pump fan blade in the heat pump wind frame, while also avoiding a reduction in air volume caused by a reduction in the overall size of the blade.
[0018] In an optional embodiment, a convex arc transition edge is provided at a corner between one end of the flange connecting the trailing edge and a side of the flange away from the blade top.
[0019] In fact, the corner between one end of the flange connected to the trailing edge and the side of the flange away from the blade top is rounded to avoid the sharp positive angle formed here affecting the smooth installation of the fan blade in the heat pump wind frame.
[0020] In an optional embodiment, the inlet angle of the leading edge gradually decreases from 13° to 8° from an end connected to the blade root of the blade to an end connected to the blade tip.
[0021] The inlet angle decreases gradually to adapt to the wind resistance at different positions on the leading edge of the blade and reduce the flow loss at different positions. In addition, the overall small-angle inlet angle design can further improve the efficiency of the fan blade and reduce noise.
[0022] In an optional embodiment, the chord length of the blade gradually increases from 168 mm to 574 mm from the root of the blade to the tip of the blade.
[0023] The large blade chord length design can reduce the separation vortex generated by airflow separation, thereby further improving the efficiency of the wind blades and reducing noise.
[0024] An embodiment of the present invention also provides an integrated heat pump, including the heat pump fan blade, the heat pump fan blade includes a mounting portion and a plurality of blades arranged on the periphery of the mounting portion, the top of the blade is provided with an upward folded flange, and the width of the flange gradually increases from one end connected to the leading edge of the blade to the end connected to the trailing edge of the blade. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A schematic diagram of the structure of a heat pump fan blade provided by an embodiment of the present invention at a first viewing angle;
[0026] Figure 2 A schematic diagram of the structure of a heat pump fan blade provided by an embodiment of the present invention at a second viewing angle;
[0027] Figure 3 is a schematic diagram of the blade shape;
[0028] Figure 4 Schematic diagram of the blade cross-section.
[0029] Description of reference numerals:
[0030] 100-heat pump fan blade; 110-installation part; 120-blade; 121-blade top; 122-flange; 123-leading edge; 124-trailing edge; 125-reinforcement rib; 126-convex arc transition edge; 127-blade root; 128-suction surface; 129-pressure surface. DETAILED DESCRIPTION
[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0032] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. 1 is a schematic diagram of the structure of the heat pump fan blade 100 provided in this embodiment at a first viewing angle. Figure 2 FIG. 1 is a schematic structural diagram of the heat pump fan blade 100 at a second viewing angle.
[0033] The heat pump fan blade 100 provided in this embodiment includes a mounting portion 110 and a plurality of blades 120 disposed on the periphery of the mounting portion 110. It is understandable that the mounting portion 110 located at the center of the plurality of blades 120 is used to connect with the motor of the heat pump, and the plurality of blades 120 are driven to rotate by the motor, thereby generating an axial airflow, so that the airflow and the refrigerant exchange heat at the heat pump evaporator.
[0034] In this embodiment, the blade tip 121 of the blade 120 is provided with a flange 122, and the width of the flange 122 gradually increases from one end connected to the leading edge 123 of the blade 120 to one end connected to the trailing edge 124 of the blade 120. In fact, in this embodiment, the flange 122 is folded toward the suction surface 128 of the blade 120, which can reduce the leakage vortex formed by the pressure surface 129 turning over the blade tip 121 above the suction surface 128, thereby reducing noise.
[0035] The end of the flange 122 connected to the leading edge 123 is the blade tip, and the end of the flange 122 connected to the trailing edge 124 is the blade tail. In this embodiment, the width of the flange 122 gradually increases from the blade tip to the blade tail, which can reduce the wind cutting area of the blade 120 and is more conducive to the blade 120 breaking the wind, thereby obtaining a good noise reduction effect.
[0036] Please refer to Figure 3 , Figure 3 A schematic diagram of the shape of the blade 120 is shown.
[0037] In this embodiment, the width of the flange 122 increases from 0 mm to 25 mm from one end connected to the leading edge 123 of the blade 120 to one end connected to the trailing edge 124 of the blade 120. In other words, the width d of the flange 122 takes a minimum value of 0 mm at the blade tip and a maximum value of 25 mm at the blade tail.
[0038] Since the width d of the flange 122 at the blade tip is zero, the wind cutting area of the blade 120 can be reduced to the greatest extent. The width d of the flange 122 at the blade tail reaches 25 mm, and the flange 122 is designed with a large width, which can further improve the noise reduction effect.
[0039] In order to further improve the effect of reducing leakage vortex and noise, in this embodiment, the angle between the flange 122 and the blade 120 is gradually changed. Specifically, from one end connected to the leading edge 123 of the blade 120 to one end connected to the trailing edge 124 of the blade 120, the angle between the flange 122 and the blade 120 gradually increases.
[0040] The angle between the flange 122 and the blade 120 refers to the angle between the tangent line at the starting position of the flange 122 and the tangent line of the flange 122, which is Figure 3 In this embodiment, the minimum value of γ is 0° at the blade tip, and the maximum value of γ is 25° at the blade tail.
[0041] It is understandable that in actual applications, the pressure difference at different positions from the blade tip to the blade tail is different, thereby generating leakage vortices of different degrees. In this embodiment, the upward angle of the flange 122 gradually increases from the blade tip to the blade tail, so as to adaptively reduce the leakage vortices at different positions, thereby significantly reducing the overall leakage vortex and achieving a better noise reduction effect.
[0042] Considering that the heat pump fan blades 100 on the market are provided with reinforcement structures on both the front and back sides, that is, the suction surface 128 and the pressure surface 129 are provided with reinforcement structures, the airflow on both sides of the blade 120 is separated, which affects the efficiency of the heat pump fan blades 100 and generates relatively large noise.
[0043] To resolve this issue, please continue to Figure 1 and Figure 2 In the heat pump fan blade 100 provided in this embodiment, the blade 120 is provided with a reinforcing rib 125 connected to the mounting portion 110 only on one side surface thereof, and the reinforcing rib 125 and the surface of the blade 120 are smoothly transitioned.
[0044] Preferably, in this embodiment, the reinforcing ribs 125 are only provided on the suction surface 128 of the blade 120. Since the reinforcing ribs 125 are only provided on the suction surface 128 of the blade 120 in this embodiment, and there is no reinforcing rib 125 structure on the pressure surface 129 of the blade 120, when the heat sealing fan blade rotates, the airflow separation on both sides of the blade 120 can be avoided, the efficiency of the heat pump fan blade 100 is improved, and the noise reduction effect is achieved.
[0045] In addition, when the existing heat pump is assembled, when the heat pump fan blade 100 is installed into the heat pump wind frame, since the rotation radius of the end of the flange 122 connected to the trailing edge 124 is larger, in order to allow the heat pump fan blade 100 to be installed into the heat pump wind frame without interference, an excessively large gap will be generated between the end of the flange 122 connected to the leading edge 123 and the side wall of the wind frame, thereby affecting the efficiency of the heat pump fan blade 100.
[0046] In order to solve this problem, in this embodiment, the radius of the rotation track of the end of the flange 122 connected to the leading edge 123 is greater than the radius of the rotation track of the end of the flange 122 connected to the trailing edge 124. This is equivalent to that the rotation radius gradually decreases from the tip to the tail of the blade 120, which prevents the rotation radius of the blade 120 near the trailing edge 124 from being too large to affect the smooth installation of the heat pump fan blade 100 in the heat pump wind frame, ensures that the gap between the blade tip and the side wall of the wind frame is reasonable, and also prevents the reduction of air volume caused by the reduction of the overall size of the blade 120.
[0047] As a preferred embodiment, in this embodiment, the diameter of the blade 120 decreases from 610 mm to 606 mm from the blade tip to the blade tail, that is, Figure 2R1 is 610mm, and R2 is 606mm. In addition, considering that the overly protruding positive angle formed by the end of the flange 122 connected to the trailing edge 124 and the side of the flange 122 away from the blade top 121 is easy to interfere with the heat pump wind frame and hinder the smooth installation of the heat pump fan blade 100, in this embodiment, a convex arc transition edge 126 is provided at the corner between the end of the flange 122 connected to the trailing edge 124 and the side of the flange 122 away from the blade top 121. In other words, in this embodiment, the blade tail is rounded to better avoid the heat pump wind window.
[0048] Please refer to Figure 4 , Figure 4 FIG. 1 is a schematic diagram of the cross-sectional shape of the blade 120 .
[0049] Considering that the inlet angle of existing products is relatively large, resulting in excessive wind resistance and excessive flow loss, in this embodiment, the inlet angle of the leading edge 123 is gradually reduced from 13° to 8° from one end connected to the blade root 127 of the blade 120 to the end connected to the blade tip 121.
[0050] In other words, on the trajectory of the leading edge 123, the inlet angle α decreases from 13° to 8°. It can be seen that in this embodiment, the inlet angle at the blade tip is reduced to 8°, which is significantly smaller than that of existing products. Combined with the fact that the width of the flange 122 at the blade tip is 0 mm, the wind resistance at the blade tip is reduced to the maximum extent, and the wind-breaking effect is excellent, so that the efficiency of the heat pump fan blade 100 is significantly improved and the noise generated is greatly reduced.
[0051] In addition, the blade chord length of the existing product is too short, resulting in airflow separation and generating a separation vortex. In this embodiment, the blade chord length of the blade 120 is improved. From the blade root 127 to the blade tip 121 of the blade 120, the blade chord length of the blade 120 is gradually increased from 168 mm to 574 mm, that is, Figure 4 The minimum length of L is 168 mm and the maximum length is 574 mm. The chord length of the blade 120 is increased, which avoids the generation of separation vortices on the surface of the blade 120, so that the efficiency of the heat pump fan blade 100 is further improved.
[0052] In addition, in the present embodiment, the installation angle θ of multiple continuous sections of the blade 120 gradually decreases from the blade root 127 to the blade top 121 of the blade 120, and preferably, the installation angle θ gradually decreases from 34.3° to 23.9°; the outlet angle β of multiple continuous sections of the blade 120 gradually decreases from the blade root 127 to the blade top 121 of the blade 120, and preferably, the outlet angle β gradually decreases from 49.5° to 43°; the average thickness r of multiple continuous sections of the blade 120 gradually decreases from the blade root 127 to the blade top 121 of the blade 120, and preferably, the average thickness r gradually decreases from 9 mm to 3 mm.
[0053] In summary, the heat pump fan blade 100 provided in this embodiment can reduce the leakage vortex and the wind cutting area, thereby obtaining a higher fan blade efficiency and a better noise reduction effect.
[0054] In addition, the present embodiment further provides an integrated heat pump, which is equipped with the aforementioned heat pump fan blade 100. Benefiting from the beneficial effects of the heat pump fan blade 100, the integrated heat pump provided by the present embodiment has the characteristics of lower noise and higher efficiency.
[0055] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.
Claims
1. A heat pump fan blade, characterized in that: The invention comprises a mounting portion (110) and a plurality of blades (120) arranged on the periphery of the mounting portion (110); a blade tip (121) of the blade (120) is provided with a flange (122); and the width of the flange (122) gradually increases from an end connected to a leading edge (123) of the blade (120) to an end connected to a trailing edge (124) of the blade (120).
2. The heat pump fan blade according to claim 1, characterized in that: From one end connected to the leading edge (123) of the blade (120) to one end connected to the trailing edge (124) of the blade (120), the width of the flange (122) increases from 0 mm to 25 mm.
3. The heat pump fan blade according to claim 1, characterized in that: From one end connected to the leading edge (123) of the blade (120) to one end connected to the trailing edge (124) of the blade (120), the angle between the flange (122) and the blade (120) gradually increases.
4. The heat pump fan blade according to claim 3, characterized in that: From one end connected to the leading edge (123) of the blade (120) to one end connected to the trailing edge (124) of the blade (120), the angle between the flange (122) and the blade (120) increases from 0° to 25°.
5. The heat pump fan blade according to claim 1, characterized in that: A reinforcing rib (125) connected to the mounting portion (110) is provided on one side surface of the blade (120), and the reinforcing rib (125) smoothly transitions to the surface of the blade (120).
6. The heat pump fan blade according to claim 1, characterized in that: The radius of the rotation track of one end of the flange (122) connected to the leading edge (123) is greater than the radius of the rotation track of one end of the flange (122) connected to the trailing edge (124).
7. The heat pump fan blade according to claim 6, characterized in that: A convex arc transition edge (126) is provided at a corner between one end of the flange (122) connected to the trailing edge (124) and a side of the flange (122) away from the blade tip (121).
8. The heat pump fan blade according to claim 1, characterized in that: From one end connected to the blade root (127) of the blade (120) to one end connected to the blade tip (121), the inlet angle of the leading edge (123) gradually decreases from 13° to 8°.
9. The heat pump fan blade according to claim 1, characterized in that: From the blade root (127) of the blade (120) to the blade tip (121), the chord length of the blade (120) gradually increases from 168 mm to 574 mm.
10. An integrated heat pump, characterized in that: It comprises the heat pump fan blade (100) as claimed in any one of claims 1 to 9.