Wind wheel, fan and refrigeration equipment

Abstract

The utility model discloses a wind wheel, a draught fan and refrigeration equipment, and belongs to the technical field of wind wheels. The fan blades comprise a plurality of blades, and the blades are arranged on the mounting side of the base in the circumferential direction of the center line of the wind wheel; the ends, close to the center of the wind wheel, of the blades are air inlet ends, and the ends, away from the center of the wind wheel, of the blades are air outlet ends. The inlet angle of each blade ranges from 16 degrees to 20 degrees, and the inlet angle is the included angle between the tangent line of each blade at the air inlet end and the tangent line direction of a circle with the center of the wind wheel as the circle center at the air inlet end. The inlet angles of the blades range from 16 degrees to 20 degrees, so that airflow flows in the wind wheel more smoothly, turbulent flow and vortex are reduced, and flow loss is reduced. The proper inlet angle can guide airflow to stably flow in the wind wheel, so that the risks of disturbance and unstable flowing are reduced, the overall flowing stability of the airflow is improved, the phenomenon of local excessive flow speed or uneven flowing is avoided, the air flowing resistance is reduced, and the operation efficiency of the wind wheel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wind wheel, especially a wind wheel, a fan and a refrigeration equipment. BACKGROUND

[0002] The refrigeration equipment usually adopts a fan to drive cold air to circulate inside the refrigeration equipment. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, and for this purpose, the utility model provides a wind wheel, reduces air flow resistance and improves fan operation efficiency.

[0004] The utility model further provides a fan using the above-mentioned wind wheel.

[0005] The utility model further provides a refrigeration equipment using the above-mentioned fan.

[0006] The utility model discloses a wind wheel, comprising:

[0007] A base has a mounting side;

[0008] A fan blade comprises a plurality of blades, which are arranged on the mounting side of the base along the circumferential direction of the center line of the wind wheel.

[0009] The wind wheel according to the utility model embodiment has at least the following beneficial effects:

[0010] The plurality of blades are arranged on the base along the circumferential direction of the base, and in the case of rotation of the wind wheel, the airflow enters from the center of the wind wheel and is pushed by the blades, and then the airflow flows out from the edge of the wind wheel.

[0011] According to the fan wheel, the outlet angle of the blade is 40-44 degrees, and the outlet angle is the included angle between the tangent of the blade at the air outlet end and the tangent of a circle with the center of the fan wheel as the center at the air outlet end.

[0012] According to the fan wheel, the air inlet end forms a circular arc chamfer on the side away from the base.

[0013] According to the fan wheel, the fan wheel further comprises a hub, the hub is arranged on the base, a plurality of the blades are arranged around the hub with the hub as the center, an outer peripheral wall of the hub forms a guide surface, the guide surface is configured as a curved surface, and the cross-sectional area of the hub gradually decreases along the center line of the fan wheel in the direction away from the base.

[0014] According to the fan wheel, the maximum size of the base is smaller than the maximum diameter of the fan wheel along the radial direction of the fan wheel.

[0015] According to the fan wheel, the base is circular, and the diameter of the base is greater than two-thirds of the maximum diameter of the fan wheel.

[0016] According to the fan wheel, the outer diameter of the fan wheel is 120-160 mm, the inner diameter of the fan blade is 60-80 mm, and the diameter of the base is 90-120 mm.

[0017] According to the fan wheel, the fan wheel further comprises an outer support connected to each of the blades and located on the side of the blade away from the base, the outer support comprises a plurality of connecting strips and two connecting rings, a hollow gap is formed between the two connecting rings, the connecting strips connect the two connecting rings, the connecting strips are located between the two connecting rings, and the included angle between the extension direction of the connecting strips and the extension direction of the blade is an acute angle.

[0018] The second aspect embodiment of the utility model provides a kind of fan, including driving part and the fan wheel described in the first aspect embodiment of the utility model, and the driving part is used to drive the fan wheel rotation.

[0019] The third aspect embodiment of the utility model provides a kind of refrigeration equipment, including shell and the fan described in the second aspect embodiment of the utility model, and the fan is installed in the shell.

[0020] Other features and advantages of the utility model will be set forth in the subsequent specification, and part becomes apparent from the specification, or is understood by implementing the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure schematic diagram of the wind wheel of one embodiment of the utility model;

[0022] Figure 2 is the overall structure schematic diagram of the wind wheel of another view of one embodiment of the utility model;

[0023] Figure 3 is Figure 2 the section view of I-I in figure 1;

[0024] Figure 4 is Figure 1 the enlarged structure schematic diagram of J in figure 1;

[0025] Figure 5 is one of partial experimental data of the preferred embodiment of the application and prior art;

[0026] Figure 6 is two of partial experimental data of the preferred embodiment of the application and prior art.

[0027] Reference signs:

[0028] Wind wheel 10;

[0029] Base 100; installation side 110;

[0030] Fan blade 200; blade 210; air inlet end 211; circular arc chamfer 211a; air outlet end 212; inlet angle α; outlet angle β;

[0031] Hub 300; air guide surface 310;

[0032] Outer support 400; connecting strip 410; connecting ring 420; open space gap 430;

[0033] First tangent line A; first reference circle B; second tangent line C; third tangent line D; second reference circle E; fourth tangent line F; center line G. DETAILED DESCRIPTION

[0034] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0035] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "axial direction", "radial direction", "circumferential direction", "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0036] In the description of the utility model, if the first and second are described for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the number or sequence of the indicated technical features.

[0037] In the description of the utility model, it should be noted that the words such as setting, installation and connection should be understood in a broad sense, and the skilled person in the art can reasonably determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0038] The technical scheme of the utility model will be described clearly and completely in combination with the drawings below, and obviously, the following described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0039] Referring to Figure 1 and Figure 2 The embodiment of the utility model provides a wind wheel 10, which comprises a base 100 and a fan blade 200; the base 100 has a mounting side 110, and the fan blade 200 comprises a plurality of blades 210, which are arranged in a circumferential direction along the center line G of the wind wheel 10 on the mounting side 110 of the base 100; one end of the blade 210 close to the center of the wind wheel 10 is an air inlet end 211, and the other end of the blade 210 away from the center of the wind wheel 10 is an air outlet end 212; the inlet angle of the blade 210 is 16 to 20 degrees, and the inlet angle is the included angle between the tangent of the blade 210 at the air inlet end 211 and the tangent direction of the circle with the center of the wind wheel 10 as the center at the air inlet end 211.

[0040] The plurality of blades 210 are arranged in a circumferential direction along the center line of the wind wheel 10 on the mounting side 110 of the base 100, in the case of rotation of the wind wheel 10, the airflow enters from the center of the wind wheel 10 and is pushed by the blade 210, and then the airflow flows out from the edge of the wind wheel 10; the inlet angle of the blade 210 is 16 to 20 degrees, and the reasonable inlet angle makes the airflow flow more smoothly in the wind wheel 10, reduces the turbulence and vortex, and thus reduces the flow loss. The appropriate inlet angle can guide the airflow to flow smoothly in the wind wheel 10, thereby reducing the risk of disturbance and unstable flow, improving the stability of the overall airflow, avoiding local excessive flow rate or uneven flow phenomenon, thereby reducing the air flow resistance and improving the operating efficiency of the wind wheel 10.

[0041] The center line of the wind wheel 10 is set as G, the center line G of the wind wheel 10 is the rotation axis of the wind wheel 10; the inlet angle is set as a, the tangent line of the blade 210 at the air inlet end 211 is the first tangent line A, the circle with the center of the wind wheel 10 as the center and the distance from the center of the wind wheel 10 to the air inlet end 211 as the radius is the first reference circle B, and the tangent line of the first reference circle B at the air inlet end 211 is the second tangent line C; the inlet angle is the included angle between the tangent line of the blade 210 at the air inlet end 211 and the tangent line direction of the circle with the center of the wind wheel 10 as the center at the air inlet end 211, that is, the inlet angle a is the included angle between the first tangent line A and the second tangent line C; in other words, when the wind wheel 10 rotates, the blade 210 pushes the airflow to flow, so that the airflow generates a circumferential velocity along the circumferential direction of the wind wheel 10, and the included angle between the circumferential rotation direction and the tangent line of the blade 210 at the air inlet end 211, that is, the included angle between the circumferential rotation direction and the first tangent line A is the inlet angle a.

[0042] If the inlet angle a is less than 16 degrees, it is considered that the inlet angle a is too small, and the too small inlet angle a makes the included angle between the flow direction of the airflow and the extension direction of the air inlet end 211 too large when the airflow passes through the air inlet end 211, the resistance of the blade 210 to the airflow is large, and the airflow may be greatly deflected when passing through the air inlet end 211, resulting in unstable flow or forming turbulence, increasing the vibration and noise of the wind wheel 10. Generally, the larger the inlet angle a, the more stable the fluid flow, and the smaller the flow loss.

[0043] If the inlet angle a is greater than 20 degrees, it is considered that the inlet angle a is too large, and the too large inlet angle a causes the airflow to separate when flowing on the surface of the blade 210, and the airflow separation causes the airflow to flow unevenly, and even forms vortex, thereby affecting the stability of the airflow. By setting a reasonable inlet angle a, the fluid can be uniformly distributed in the entire wind wheel 10, avoiding local excessive flow rate or uneven flow phenomenon.

[0044] The blades 210 extend from the center of the wind wheel 10 towards the edge of the wind wheel 10 to guide the airflow that enters the center of the wind wheel 10 and flows out from the edge of the wind wheel 10. The blades 210 are curved along their extension direction to form an arc shape. When the airflow passes through the surface of the arc-shaped blades 210, the direction and speed of the airflow can be gradually changed, making the acceleration of the airflow more stable, reducing the occurrence of airflow separation and turbulence, and thus improving the working efficiency of the wind wheel 10. A plurality of blades 210 are arranged along the circumferential direction of the wind wheel 10; the plurality of blades 210 are equally spaced and have the same size, so that the airflow flows more smoothly and uniformly inside the wind wheel 10; the inlet ends 211 of the plurality of blades 210 are connected to form a circle with the wind wheel 10 as the center, i.e., a first reference circle B; the angle between the tangent of the first reference circle B at any inlet end 211 of a blade 210 and the tangent of the blade 210 at the inlet end 211, i.e., the angle between the first tangent A and the second tangent C, is 16 to 20 degrees.

[0045] As shown in Figure 2 some embodiments, the inlet angle a is 17 to 19 degrees, for example, the inlet angle a can be specifically 18 degrees. Limiting the inlet angle a to a suitable range makes the airflow flow better along the curved surface of the blades 210, reduces the phenomenon of airflow separation, and thus improves the overall performance of the wind wheel 10. Limiting the inlet angle a to a reasonable range can improve the stability and uniformity of the airflow.

[0046] As shown in Figure 2 some embodiments, the outlet angle of the blade is 40 to 44 degrees, and the outlet angle is the angle between the tangent of the blade 210 at the outlet end 212 and the tangent of the circle with the center of the wind wheel 10 as the center at the outlet end 212.

[0047] A reasonable outlet angle allows the airflow to smoothly flow out of the outlet end of the blade 210 to the outside of the wind wheel 10, reduces unnecessary interference between the blade 210 and the airflow, reduces turbulence, vortex and energy loss, and improves the aerodynamic efficiency of the wind wheel 10. A suitable outlet angle can better control the flow direction of the airflow, making the speed and pressure distribution of the airflow at the outlet of the blade 210 more uniform, which helps the wind wheel 10 to generate a higher pressure difference.

[0048] Let the outlet angle be β, the tangent of the blade 210 at the outlet 212 be the third tangent D, the circle with the center of the impeller 10 as the center and the distance from the center of the impeller 10 to the outlet 212 as the radius be the second reference circle E, and the tangent of the second reference circle E at the outlet 212 be the fourth tangent F; the inlet angle is the angle between the extension of the outlet 212 and the tangent direction of the circle with the center of the impeller 10 as the center at the outlet 212, that is, the outlet angle β is the angle between the third tangent D and the fourth tangent F; in other words, when the impeller 10 rotates, the blade 210 pushes the airflow, causing the airflow to generate a circumferential velocity along the circumferential direction of the impeller 10, and the circumferential rotation direction and the third tangent D are the outlet angle β.

[0049] If the outlet angle β is less than 40 degrees, it is considered that the outlet angle β is too small. An excessively small outlet angle β causes the angle between the airflow direction and the extension direction of the outlet end 212 to be too large when the airflow passes through the outlet end 212. This will cause the airflow to undergo a large turning angle at the outlet end 212. When the airflow flows out of the blade 210, it may be subject to unnecessary resistance and interference, causing turbulence, eddies and other phenomena, thereby increasing aerodynamic drag.

[0050] If the outlet angle β is greater than 44 degrees, it is considered that the outlet angle β is too large. An excessively large outlet angle β is likely to cause the airflow to backflow at the outlet end 212, resulting in unstable airflow.

[0051] Multiple blades 210 are equidistantly spaced along the circumferential direction of the impeller 10; wherein, the air outlet ends 212 of the multiple blades 210 are connected to form a circle centered on the impeller 10, namely the second reference circle E; the angle between the tangent of the second reference circle E at the air outlet end 212 of any blade 210 and the tangent of the blade 210 at the air outlet end 212, namely the angle between the third tangent D and the fourth tangent F, is 40 degrees to 44 degrees.

[0052] like Figure 2 As shown, in some embodiments, the outlet angle β is 41 to 43 degrees, for example, the outlet angle β can be 42 degrees. A suitable outlet angle β helps the airflow to exit the impeller more smoothly, reduces the possibility of airflow reversal or backflow, and is more conducive to maintaining a stable airflow and improving the working efficiency of the impeller 10.

[0053] like Figure 1 As shown, in some embodiments, the air inlet 211 forms a rounded chamfer 211a on the side away from the base 100. The rounded chamfer 211a is an arc surface. The arc surface design can reduce the airflow resistance at the air inlet 211 and improve the smoothness of the airflow within the impeller 10. In addition, the arc-shaped rounded chamfer 211a can reduce the sharp turns and turbulence of the airflow, thereby reducing the noise source of the airflow.

[0054] likeFigure 1 and Figure 3 As shown, in some embodiments, the wind turbine 10 further includes a hub 300, which is disposed on the base 100; a plurality of blades 210 are arranged around the hub 300 with the hub 300 as the center; the outer peripheral wall of the hub 300 forms a wind guide surface 310, which is constructed as an arc surface, and the cross-sectional area of ​​the hub 300 gradually decreases along the center line of the wind turbine 10 toward the direction away from the base 100.

[0055] It is understood that the hub 300 is located at the center of the wind turbine 10, and there is a gap between the hub 300 and the blades 210. The airflow enters the interior of the wind turbine 10 from the center of the airflow, flows through the blades 210 to the edge of the wind turbine 10. The hub 300 is connected to the drive part of the drive component. For example, the hub 300 can be connected to the rotating shaft of the motor. When the motor is running, the hub 300 rotates, causing the blades 210 to rotate. Multiple blades 210 are arranged around the hub 300 with the hub 300 as the center. The blades 210 can rotate around the hub 300 to guide the airflow from the center of the wind turbine 10 to the edge of the wind turbine 10. The outer peripheral wall of the hub 300 forms a guide surface 310. When the airflow passes through the outer peripheral wall of the hub 300, the guide surface 310 can guide the airflow entering the wind turbine 10 to the air inlet 211. The guide surface 310 is constructed as an arc surface. The arc surface can smoothly guide the airflow, reduce flow resistance, and help improve the air volume transport capacity of the wind turbine 10. Compared to the flat or angular hub 300, the wind guide surface 310 is constructed as a curved surface, which can reduce turbulence in the airflow, thereby improving the working efficiency and stability of the wind turbine 10. In addition, constructing the wind guide surface 310 as a curved surface is beneficial to more evenly distribute wind load and airflow pressure, optimize the wind resistance of the wind turbine 10, improve the structural strength of the hub 300, and reduce the risk of damage to the wind turbine 10.

[0056] Furthermore, the cross-sectional area of ​​the hub 300 gradually decreases along the center line G of the impeller 10 in the direction away from the base 100. The airflow flows along the center line G of the impeller 10 to the center of the impeller 10, and flows through the guide surface 310 to the blade 210. The airflow flows in at the center of the impeller 10 and turns to flow to the surface of the blade 210. This arrangement allows the airflow to have sufficient turning space in the hub 300, which is conducive to the airflow changing direction and flowing to the air inlet end 211.

[0057] The base 100 is used to support the blade 210. The hub 300 may protrude from the base 100. The hub 300 and the base 100 may be integrally formed. For example, the hub 300 and the base 100 may be integrally formed by injection molding, or the hub 300 and the base 100 may be integrally formed by stamping. This embodiment of the utility model does not make any special limitation in this regard.

[0058] likeFigure 3 As shown in some embodiments, along the radial direction of the wind wheel 10 (e.g., the a direction in FIG. 1), the maximum dimension H2 of the base 100 is less than the maximum diameter H1 of the wind wheel 10. In this way, the material of the base 100 can be reduced as much as possible while bearing the blades 210, thereby saving costs. Moreover, reducing the dimension of the base 100 in the radial direction of the wind wheel 10 can increase the air flow as much as possible and reduce the air resistance. Figure 3

[0059] As shown in some embodiments, the base 100 is circular. The circular structure is more conducive to the stable operation of the wind wheel 10 and improves the stability of the wind wheel 10. In order to save material, the base 100 can be a circular plate. The diameter of the base 100 is greater than two-thirds of the maximum diameter H1 of the wind wheel 10. If the diameter of the base 100 is too small, it is insufficient to support the blades 210. If the diameter of the base 100 is too large, it causes material waste. Figure 1 Figure 3 In some embodiments, the outer diameter of the wind wheel 10 is 120 mm to 160 mm, for example, the outer diameter of the wind wheel 10 can be specifically 140 mm; the inner diameter of the fan blade 200 is 60 mm to 80 mm, for example, the inner diameter of the fan blade 200 can be specifically 70 mm; the fan blade 200 is composed of a plurality of blades 210, and the plurality of blades 210 are arranged along the circumference of the base 100 and arranged on the base 100. The air inlet end 211 of the plurality of blades 210 is connected to form a circle with the wind wheel 10 as the center, and the diameter is the inner diameter of the fan blade 200, that is, the diameter of the first reference circle B is the inner diameter of the fan blade 200. The air outlet end 212 of the plurality of blades 210 is connected to form a circle with the wind wheel 10 as the center, and the diameter is the outer diameter of the fan blade 200, that is, the outer diameter of the wind wheel 10, that is, the diameter of the second reference circle E is the outer diameter of the wind wheel 10. By limiting the size of the fan blade 200, the size of the fan blade 200 can be reduced as much as possible while ensuring the air outlet efficiency of the fan blade 200, thereby reducing the volume of the wind wheel 10, which is conducive to the miniaturization of the wind wheel 10.

[0060] In some embodiments, the diameter of the base 100 is 90 mm to 120 mm, for example, the diameter of the base 100 can be specifically 110 mm. The size of the base 100 is set according to the size of the fan blade 200. On the premise of ensuring the supporting effect of the base 100, the size of the base 100 is reduced as much as possible to save the material of the base 100, thereby reducing the production cost.

[0061] As shown in some embodiments, the base 100 is circular. The circular structure is more conducive to the stable operation of the wind wheel 10 and improves the stability of the wind wheel 10. In order to save material, the base 100 can be a circular plate. The diameter of the base 100 is greater than two-thirds of the maximum diameter H1 of the wind wheel 10. If the diameter of the base 100 is too small, it is insufficient to support the blades 210. If the diameter of the base 100 is too large, it causes material waste.

[0062] As shown in some embodiments, the base 100 is circular. The circular structure is more conducive to the stable operation of the wind wheel 10 and improves the stability of the wind wheel 10. In order to save material, the base 100 can be a circular plate. The diameter of the base 100 is greater than two-thirds of the maximum diameter H1 of the wind wheel 10. If the diameter of the base 100 is too small, it is insufficient to support the blades 210. If the diameter of the base 100 is too large, it causes material waste. Figure 1 Figure 4 ​​​As shown in the drawings, in some embodiments, the wind wheel 10 further comprises an outer support 400 connected to each blade 210 and located on the side of the blade 210 away from the base 100; the outer support 400 can enhance the structural strength and stability of the blade 210, prevent the blade 210 from excessive bending or deformation, and ensure that the wind wheel 10 can run safely and stably under high speed and high load.

[0063] As shown in the drawings, Figure 1 and Figure 4 As shown in the drawings, in some embodiments, the outer support 400 comprises a plurality of connecting strips 410 and two connecting rings 420, and a hollow gap 430 is formed between the two connecting rings 420; the connecting strips 410 connect the two connecting rings 420, and the connecting strips 410 are located between the two connecting rings 420. The diameters of the two connecting rings 420 are different, so that one of the connecting rings 420 can be sleeved outside the other connecting ring 420; the outer support 400 is used to reinforce the blade 200, therefore, the inner diameter of at least one of the connecting rings 420 is smaller than the outer diameter of the wind wheel 10, so that the outer support 400 can connect the blade 200. It should be noted that the base 100, the blade 200 and the outer support 400 are coaxially arranged to ensure the balance of the overall rotation of the wind wheel 10, thereby ensuring that the wind wheel 10 can run normally.

[0064] In the case of unbalanced overall rotation of the wind wheel 10, dissolved glue can be dripped at the hollow gap 430, and the glue drips and adheres to the two connecting rings 420; the hollow gap 430 can increase the contact area of the glue with air, thereby accelerating the solidification of the glue. The weight of the glue can be used to counterbalance the wind wheel 10, thereby improving the balance of the rotation of the wind wheel 10. Generally, the gap between the two connecting rings 420 is about six millimeters, which can ensure the contact area of the glue with air and avoid the dissolved glue passing through the gap between the two connecting rings 420.

[0065] The angle between the extension direction of the connecting strip 410 and the extension direction of the adjacent blade 210 is an acute angle, so that the direction of the connecting strip 410 is as close as possible to the flow direction of the air flow, thereby reducing the resistance of the connecting strip 410 to the air flow as much as possible. Specifically, the connecting strip 410 can be substantially consistent with the extension direction of the air outlet end 212 of the adjacent blade 210, thereby further reducing the interference of the connecting strip 410 with the air flow.

[0066] The outer support 400 is connected to each blade 210, and the two connecting rings 420 are connected to the blade 210, that is, the air outlet end 212 is connected to the two connecting rings 420; on the one hand, the fixing effect of the outer support 400 on the blade 210 can be enhanced, so that the rotation of the fan blade 200 is more stable, and the balance of the operation of the fan wheel 10 is improved; on the other hand, the firmness of the connection of the two connecting rings 420 can be enhanced, so as to avoid the shaking of the two connecting rings 420 during the operation of the fan wheel 10. The connecting strip 410 can be arranged between the adjacent two blades 210, so as to avoid the interference of the connecting strip 410 with the arrangement of the blade 210; the included angle between the extension direction of the connecting strip 410 and the extension direction of any adjacent blade 210 is an acute angle, so as to reduce the resistance of the connecting strip 410 to the airflow as much as possible, and the airflow can flow smoothly to the outside of the fan wheel 10 when passing through the connecting strip 410. In the embodiment, the blade 210 is provided with eleven pieces, and the connecting strip 410 is provided with eleven pieces, and the connecting strip 410 and the blade 210 are arranged at intervals. Of course, the number of the blade 210 can be arranged according to actual needs in other embodiments, and the embodiment of the utility model is not particularly limited.

[0067] The second aspect of the utility model provides a kind of fan, including driving member and the fan wheel 10 of above-mentioned first aspect embodiment, and driving member is used to drive fan wheel 10 rotation.

[0068] Generally, driving member is motor;Driving member can be connected to the hub 300 of fan wheel 10, and blade 210 is rotated by driving member driving.When fan operates, driving member works, blade 210 rotates, air flows into fan wheel 10 and is pushed by blade 210, so as to be accelerated and thrown outward;Air flow obtains centrifugal force outward under the action of blade 210, so that the speed of airflow gradually increases.

[0069] In preferred embodiments, the data tested by the inventor through experiments are as follows Figure 5 And Figure 6 In Figure 5 , by comparing the scheme with inlet angle less than 16 ° and the scheme with inlet angle greater than 20 ° with the scheme of the embodiment of the application, the power and air volume of the preferred embodiment of the application are improved compared with the power and air volume of the prior art, under the condition that the blade shape and the fan wheel structure remain unchanged. Figure 6 In , by comparing the scheme with outlet angle less than 40 ° and the scheme with outlet angle greater than 44 ° with the scheme of the embodiment of the application, the power and air volume of the preferred embodiment of the application are improved compared with the power and air volume of the prior art, under the condition that the blade shape and the fan wheel structure remain unchanged.

[0070]

[0070] The fan wheel 10 has the beneficial effects of the above-mentioned embodiments, so the fan also has the beneficial effects of the above-mentioned embodiments, and the specific embodiments can refer to the above-mentioned embodiments, which will not be described herein.

[0071] The third aspect embodiment of the utility model provides a kind of refrigeration equipment, including shell and the fan of above-mentioned second aspect embodiment, fan is installed in shell.

[0072] The embodiment of the utility model further provides a kind of refrigeration equipment, which can be refrigerator, freezer and the like with refrigeration equipment, and the refrigeration equipment includes shell and the fan of above-mentioned second aspect embodiment.Taking refrigerator as example, refrigerator has shell, and fan is installed inside shell to drive the gas flow inside shell.Fan has the beneficial effects of above-mentioned embodiment, so that the refrigeration equipment has the beneficial effects of above-mentioned embodiment accordingly, and its specific implementation mode can be referred to above-mentioned embodiment, and the present application will not be described again.

[0073] The above-mentioned embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A wind wheel, characterized in that The fan wheel comprises: a base having a mounting side; a plurality of blades arranged circumferentially along a center line of the fan wheel on the mounting side of the base; an inlet end of each blade is close to the center of the fan wheel, and an outlet end of each blade is away from the center of the fan wheel; an inlet angle of each blade is 16-20 degrees, and the inlet angle is an angle between a tangent line of the inlet end of each blade and a tangent line of a circle with the center of the fan wheel as a center at the inlet end of each blade.

2. The wind wheel of claim 1, wherein, an outlet angle of each blade is 40-44 degrees, and the outlet angle is an angle between a tangent line of the outlet end of each blade and a tangent line of the circle with the center of the fan wheel as the center at the outlet end of each blade.

3. The wind wheel of claim 1, wherein, the inlet end is formed with a circular arc chamfer away from the base.

4. The wind wheel of claim 1, wherein, The fan wheel further comprises a hub arranged on the base, and the plurality of blades are arranged around the hub with the hub as a center; an outer peripheral wall of the hub forms a guide surface, the guide surface is configured as a curved surface, and a cross-sectional area of the hub gradually decreases along the center line of the fan wheel towards a direction away from the base.

5. The wind wheel according to any one of claims 1 to 4, characterized in that In a radial direction of the fan wheel, a maximum dimension of the base is smaller than a maximum diameter of the fan wheel.

6. The wind wheel of claim 5, wherein, The base is circular, and a diameter of the base is greater than two-thirds of the maximum diameter of the fan wheel.

7. The wind wheel of claim 6, wherein, An outer diameter of the fan wheel is 120-160 mm, and an inner diameter of the fan blade is 60-80 mm; a diameter of the base is 90-120 mm.

8. The wind wheel according to any one of claims 1 to 4, characterized in that The fan wheel further comprises an outer support connected to each blade and located on a side of each blade away from the base; the outer support comprises a plurality of connecting strips and two connecting rings, and a hollow gap is formed between the two connecting rings; the connecting strips connect the two connecting rings, and the connecting strips are located between the two connecting rings, and an angle between an extension direction of each connecting strip and an extension direction of an adjacent blade is an acute angle.

9. A fan, characterized by The fan comprises a driving member and the fan wheel according to any one of claims 1-8, and the driving member is used to drive the fan wheel to rotate.

10. A refrigeration appliance characterized in that, The fan comprises a housing and the fan according to claim 9, and the fan is arranged in the housing.

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