Low-noise axial flow condensation fan

Abstract

The utility model belongs to the technical field of automobile condensate fans, and provides a low-noise axial flow condensate fan which comprises a frame, a motor and fan blades. Wherein the motor is mounted on the frame; the fan blade is provided with a hub and a plurality of main blades which are evenly connected to the hub around a center shaft of the hub, the main blades are connected to the motor through the hub and driven by the motor to rotate in a plane perpendicular to the center shaft of the hub, and the ends, away from the hub, of the main blades extend outwards to form ailerons which are gradually close to the motor in the axial direction of the hub. The main blades and the ailerons are obliquely arranged relative to the rotating plane of the main blades, and the inclination angle of the ailerons is smaller than that of the main blades.

Description

Technical Field

[0001] The present application belongs to the technical field of automobile condensing fans, and more specifically, to a low-noise axial flow condensing fan. Background Art

[0002] Axial flow condensing fans are usually used in vehicle refrigeration systems to provide the necessary ventilation and cooling effects. However, the defect of excessive noise has always been a major problem faced by users during use. The noise of axial flow fans is mainly caused by the high-frequency vibration caused by the continuous interaction between the elastic restoring force of the blades themselves and the lift formed on the blades after the air passes through the axial flow fan. The design of traditional axial flow fans often only focuses on air volume and air pressure, and the control of noise is relatively insufficient. This is also one of the noise sources that lead to increased noise inside the vehicle. In order to improve driving comfort, it is necessary to solve the above technical problems. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a low-noise axial-flow condensing fan to solve the technical problem of high noise in the existing axial-flow condensing fan.

[0004] To achieve the above purpose, the technical solution adopted in this application is to provide a low-noise axial flow condensing fan, including:

[0005] a frame having an inner ring and an outer ring;

[0006] a motor mounted on the inner ring of the frame;

[0007] A fan blade comprises a hub and a plurality of main blades uniformly connected to the hub around the central axis of the hub, and a balancing sleeve formed at the outer edge end of the main blade and circumferentially closing an axial opening, wherein the main blade is connected to the motor through the hub and driven by the motor to rotate in a plane perpendicular to the central axis of the hub, an end of the main blade away from the hub extends outwardly to have an aileron gradually approaching the motor along the axial direction of the hub, the main blade and the aileron are both inclined relative to the rotation plane of the main blade and the inclination angle of the aileron is smaller than the inclination angle of the main blade, the outer wall of the balancing sleeve and the inner wall of the outer ring have at least one overlapping area in the axial direction of the motor and there is a gap between the outer wall of the balancing sleeve and the inner wall of the outer ring, and a flange ring is provided at the outer end of the balancing sleeve away from the overlapping area, and the flange ring radially extends to the outer wall of the outer ring.

[0008] Optionally, the flap has an inclination angle D of 87° relative to the central axis of the hub in the tangential direction of the rotation of the main blade.

[0009] Optionally, the flap has an inclination angle C of 85° in the radial direction of the hub relative to the central axis of the hub.

[0010] Optionally, the flap forms a tip at a side away from the main blade.

[0011] Optionally, the fan blade further comprises an inner wind-inducing wing connected to the main blade, and the main blade is connected to the hub via the inner wind-inducing wing;

[0012] The inner air induced wing is arranged to be inclined relative to the rotation plane of the main blade, and the inclination angle of the inner air induced wing is greater than the inclination angle of the main blade.

[0013] The beneficial effect of the low-noise axial flow condensing fan provided by the present application is that compared with the prior art, in the low-noise axial flow condensing fan provided by the present application, the fan blades include a plurality of main blades arranged around the central axis of the hub and ailerons connected to the ends of the main blades. Since the main blades and the ailerons are both inclined relative to the rotation plane of the main blades and the inclination angle of the ailerons is smaller than the inclination angle of the main blades, during the rotation of the main blades, the ailerons can be well used to balance the lift exerted on the main blades, thereby effectively reducing the oscillation of the main blades and significantly reducing the working noise of the axial flow fan, which is far superior to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 The overall structure of the low-noise axial flow condensing fan provided in the embodiment of the present application is schematically shown. Figure 1 ;

[0016] Figure 2 The overall structure of the low-noise axial flow condensing fan provided in the embodiment of the present application is schematically shown. Figure 2 ;

[0017] Figure 3 A schematic diagram of the main structure of a low-noise axial flow condensing fan provided in an embodiment of the present application;

[0018] Figure 4 For along Figure 3 The cross-sectional structure diagram along the AA line;

[0019] Figure 5 For along Figure 3 The cross-sectional structure diagram of the middle BB line;

[0020] Figure 6 for Figure 2 A partial enlarged view of point E in the middle;

[0021] Figure 7 for Figure 5 A partial enlarged view of point F in the middle.

[0022] Among them, the reference numerals in the figure are: 101, frame; 102, motor; 103, fan blade; 131, hub; 132, main blade; 133, aileron; 134, inner induced draft wing; 135, balancing sleeve; 136, flange ring; 137, inner ring; 138, outer ring. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] Please also read Figures 1 to 7 Now, a low-noise axial flow condensing fan provided in an embodiment of the present application is described. The low-noise axial flow condensing fan comprises a frame 101, a motor 102 and a fan blade 103. Among them:

[0028] The frame 101 has an inner ring 137 and an outer ring 138. It can be understood that the inner ring 137 and the outer ring 138 are connected to each other at the end away from the fan blade 103. The connection method and structure can adopt the technology of the existing condensing fan;

[0029] The motor 102 is mounted on the inner ring 137 of the frame 101. The fan blade 103 has a hub 131 and a plurality of main blades 132 uniformly connected to the hub 131 around the central axis of the hub 131, and a balancing sleeve 135 formed at the outer edge end of the main blade 132 and circumferentially closing the axial opening. The main blade 132 is connected to the motor 102 through the hub 131 and is driven by the motor 102 to rotate in a plane perpendicular to the central axis of the hub 131. The end of the main blade 132 away from the hub 131 extends outwardly along the axial direction of the hub 131. The aileron 133 gradually approaches the motor 102, the main blade 132 and the aileron 133 are both inclined relative to the rotation plane of the main blade 132 and the inclination angle of the aileron 133 is smaller than the inclination angle of the main blade 132, the outer wall of the balancing sleeve 135 and the inner wall of the outer ring 138 have at least one overlapping area in the axial direction of the motor 102, and there is a gap between the outer wall of the balancing sleeve 135 and the inner wall of the outer ring 138, and a flange ring 136 is provided at the outer end of the balancing sleeve 135 away from the overlapping area, and the flange ring 136 extends radially to the outer wall of the outer ring 138.

[0030] According to the above structure provided in the present embodiment, in the low-noise axial flow condensing fan provided in the present embodiment, the fan blade 103 includes a plurality of main blades 132 arranged around the central axis of the hub 131 and an aileron 133 connected to the end of the main blade 132. Since the main blade 132 and the aileron 133 are both inclined relative to the rotation plane of the main blade 132 and the inclination angle of the aileron 133 is smaller than the inclination angle of the main blade 132, during the rotation of the main blade 132, the aileron 133 can be well used to balance the lift received by the main blade 132, thereby effectively reducing The vibration of the main blade 132 can be reduced and the working noise of the axial flow fan can be significantly reduced. At the same time, the outer edge end of the main blade 132 including the aileron 133 is connected as a whole through the balancing sleeve 135, which effectively improves the overall rigidity of the fan blade 103. When the fan blade 103 rotates, the axial resistance generated by the end face of the flange ring 136 further reduces the axial deformation force of the main blade 132 caused by the suction pressure, thereby reducing the elastic deformation of the main blade 132 during the rotation process, thereby further reducing the vibration of the main blade 132 and reducing the working noise of the axial flow fan, which is far superior to the existing technology.

[0031] In another embodiment of the present application, please refer to Figures 1 to 7The flap 133 has an inclination angle D of 87° relative to the central axis of the hub 131 in the tangential direction of the main blade 132. According to the above structure provided in this embodiment, the flap 133 is set to have the above inclination angle relative to the central axis of the hub 131 to achieve a better noise elimination effect.

[0032] In another embodiment of the present application, please refer to Figures 1 to 7 The aileron 133 has an inclination angle C of 85° relative to the central axis of the hub 131 in the radial direction of the hub 131. According to the above structure provided in this embodiment, the aileron 133 is arranged to have the above inclination angle relative to the central axis of the hub 131 to achieve a better noise elimination effect.

[0033] In another embodiment of the present application, please refer to Figures 1 to 7 The aileron 133 forms a tip on the side away from the main blade 132. According to the above structure provided in this embodiment, the tip provided on the aileron 133 is conducive to reducing the air resistance when the fan blade 103 rotates, which is conducive to achieving the technical effect of energy saving and emission reduction.

[0034] In another embodiment of the present application, please refer to Figures 1 to 7 , the fan blade 103 also includes an inner draft wing 134 connected to the main blade 132, and the main blade 132 is connected to the hub 131 through the inner draft wing 134. In this embodiment, the inner draft wing 134 is inclined relative to the rotation plane of the main blade 132, and the inclination angle of the inner draft wing 134 is greater than the inclination angle of the main blade 132. According to the above structure provided in this embodiment, since the inner draft wing 134 is arranged at the root of the main blade 132 and connected to the hub 131, it is possible to significantly increase the air intake of the axial flow fan while ensuring the structural strength of the fan blade 103, and achieve a better ventilation effect, which is far superior to the prior art.

[0035] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A low-noise axial flow condensing fan, comprising: A frame (101) having an inner ring (137) and an outer ring (138); A motor (102) mounted on the inner ring (137) of the frame (101); It is characterized by further comprising: A fan blade (103) comprises a hub (131), a plurality of main blades (132) uniformly connected to the hub (131) around a central axis of the hub (131), and a balancing sleeve (135) formed at the outer edge end of the main blade (132) and circumferentially closing an axial opening, wherein the main blade (132) is connected to the motor (102) via the hub (131) and driven by the motor (102) to rotate in a plane perpendicular to the central axis of the hub (131), and an end of the main blade (132) away from the hub (131) extends outwardly to have a axial direction of the hub (131) gradually approaching the motor (102). The aileron (133) is provided with a main blade (132) and the aileron (133) being inclined relative to a rotation plane of the main blade (132), and the inclination angle of the aileron (133) is smaller than the inclination angle of the main blade (132); the outer wall of the balancing sleeve (135) and the inner wall of the outer ring (138) have at least one overlapping area in the axial direction of the motor (102), and there is a gap between the outer wall of the balancing sleeve (135) and the inner wall of the outer ring (138); the outer end of the balancing sleeve (135) away from the overlapping area is provided with a flange ring (136), and the flange ring (136) radially extends to the outer wall of the outer ring (138).

2. The low-noise axial flow condensing fan according to claim 1, characterized in that: The flap (133) has an inclination angle D of 87° relative to the central axis of the hub (131) in the tangential direction of the rotation of the main blade (132).

3. The low-noise axial flow condensing fan according to claim 2, characterized in that: The aileron (133) has an inclination angle C of 85° relative to the central axis of the hub (131) in the radial direction of the hub (131).

4. The low-noise axial flow condensing fan according to claim 1, characterized in that: The flap (133) forms a tip on a side away from the main blade (132).

5. The low-noise axial flow condensing fan according to claim 1, characterized in that: The fan blade (103) further comprises an inner wind-inducing wing (134) connected to the main blade (132); the main blade (132) is connected to the hub (131) via the inner wind-inducing wing (134); The inner air induction wing (134) is arranged to be inclined relative to the rotation plane of the main blade (132), and the inclination angle of the inner air induction wing (134) is greater than the inclination angle of the main blade (132).

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