Centrifugal wind wheel and air conditioning equipment

Abstract

The invention discloses a centrifugal wind wheel and air conditioning equipment, and the centrifugal wind wheel comprises a wheel body; the multiple first-stage blades are distributed in the circumferential direction of the wheel body at intervals, and a first-stage airflow runner is defined between every two adjacent first-stage blades; and the multiple second-stage blades are distributed in the circumferential direction of the wheel body at intervals and located on the outer sides of the multiple first-stage blades, a second-stage airflow runner communicated with the first-stage airflow runner is defined between every two adjacent second-stage blades, and the outer edges of the first-stage blades are connected with the inner edges of the second-stage blades. According to the centrifugal wind wheel, the multiple first-stage blades and the multiple second-stage blades are arranged on the centrifugal wind wheel, the airflow flowing state on the centrifugal wind wheel is obviously improved, non-uniform flowing is reduced, the rectification effect is achieved, the turbulent flow flowing state is improved, the overall noise of air conditioning equipment is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a centrifugal fan wheel and air conditioning equipment having the centrifugal fan wheel. Background Art

[0002] Fresh air air conditioner is an air conditioner with fresh air function, which uses centrifugal fan to realize the circulation and ventilation between indoor air and outdoor air. At the same time, fresh air air conditioner also has the function of purifying air, so that the indoor environment can be healthier and more comfortable. The centrifugal fan and its purification module are collectively referred to as fresh air module. In the related art, due to the air intake cavity of the fresh air module and the left-right arrangement of the fan, there is a relatively large angle between the ideal axial air intake direction and the air flow from the collector to the inside of the fan, which makes the air flow entering the blade flow channel uneven and generates non-uniform vibration between the blade flow channels, thereby causing vortex noise and high noise problems, and there is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a centrifugal wind wheel, which can well adjust the intake air flow, reduce non-uniform flow, and reduce vibration noise by setting a primary blade and a secondary blade to guide the flow together.

[0004] According to an embodiment of the present invention, the centrifugal wind wheel includes: a wheel body; a plurality of primary blades, the plurality of primary blades are spaced apart and distributed in the circumferential direction of the wheel body, and a primary airflow channel is defined between two adjacent primary blades; a plurality of secondary blades, the plurality of secondary blades are spaced apart and distributed in the circumferential direction of the wheel body and are located on the outside of the plurality of primary blades, a secondary airflow channel connected to the primary airflow channel is defined between two adjacent secondary blades, and the outer edge of the primary blade is connected to the inner edge of the secondary blade.

[0005] According to the centrifugal wind wheel of the embodiment of the present invention, by arranging multiple primary blades and multiple secondary blades on the centrifugal wind wheel, the flow state of the airflow on the centrifugal wind wheel is significantly improved, the non-uniform flow is reduced, the rectification effect is achieved, and the turbulent flow state is improved, so that the vibration noise generated by the airflow in the process of flowing through the primary blades and the secondary blades is smaller, thereby reducing the overall noise of the air-conditioning equipment and improving the user experience.

[0006] According to the centrifugal wind wheel of some embodiments of the present invention, the number of the first-stage blades is set to be smaller than the number of the second-stage blades.

[0007] According to some embodiments of the centrifugal wind wheel of the present invention, the number of the first-stage blades is N, and satisfies: 6≤N≤23.

[0008] According to the centrifugal wind wheel of some embodiments of the present invention, N>11.

[0009] According to the centrifugal impeller of some embodiments of the present invention, the flow channel width of the primary airflow flow channel is configured to gradually increase from the inside to the outside, or to first gradually decrease or then gradually increase from the inside to the outside.

[0010] According to the centrifugal wind wheel of some embodiments of the present invention, the ratio of the outer edge width to the inner edge width of the primary airflow channel is 1.4 to 2.1.

[0011] According to the centrifugal wind wheel of some embodiments of the present invention, one of the two adjacent primary blades is arranged to gradually approach the other from the outer edge to the inner edge.

[0012] According to the centrifugal wind wheel of some embodiments of the present invention, the primary blades and the secondary blades are both constructed as arc blades, the multiple primary blades and the multiple secondary blades are respectively distributed in a spiral, and the rotation direction of the multiple primary blades is opposite to the rotation direction of the multiple secondary blades.

[0013] According to the centrifugal wind wheel of some embodiments of the present invention, the plurality of primary blades are evenly spaced apart in the circumferential direction of the wheel body; and / or the plurality of secondary blades are evenly spaced apart in the circumferential direction of the wheel body.

[0014] According to the centrifugal wind wheel of some embodiments of the present invention, the thickness of the first-stage blade is configured to gradually increase from the outer edge to the inner edge.

[0015] According to the centrifugal wind wheel of some embodiments of the present invention, an arc-shaped transition section is formed at the connection between the primary blade and the secondary blade.

[0016] According to the centrifugal wind wheel of some embodiments of the present invention, in the radial direction along the wheel body, the projection of the primary blade coincides with the projection of the secondary blade located outside the primary blade.

[0017] The invention also provides an air conditioning device.

[0018] An air conditioning device according to an embodiment of the present invention comprises the centrifugal wind wheel described in any one of the above embodiments.

[0019] The advantages of the air conditioning device and the above-mentioned centrifugal fan wheel over the prior art are the same and will not be described in detail here.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a structural schematic diagram of a fresh air module according to an embodiment of the present invention;

[0023] Figure 2 is an exploded diagram of a fresh air module according to an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the structure of a centrifugal wind wheel according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] Fresh air module 100,

[0027] Centrifugal wind wheel 1, primary blade 11, primary air flow channel 111, secondary blade 12, secondary air flow channel 121, arc transition section 13, wheel body 14,

[0028] Volute 2, left volute 21, left sound insulation cover 211, left sound absorbing cotton 212, right volute 22, right sound insulation cover 221, right sound absorbing cotton 222, air inlet 23, air outlet 24, filter bracket 25, filter 251, motor 26, air duct 27. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 3 A centrifugal wind wheel 1 according to an embodiment of the present invention is described. The centrifugal wind wheel 1 can be applied to air-conditioning equipment, wherein the air-conditioning equipment may include a fresh air module 100, and the fresh air module 100 is used to realize the circulation and ventilation between indoor air and outdoor air. When the centrifugal wind wheel 1 in the present invention is installed in the fresh air module 100, the centrifugal wind wheel 1 is configured to have axial air inlet and radial air outlet. Through the design of the first-stage blades 11 and the second-stage blades 12, the non-uniform flow in the air flow channel can be reduced, the vibration noise can be reduced, and the user experience can be improved.

[0033] like Figure 1-Figure 3 As shown, a centrifugal wind wheel 1 according to an embodiment of the present invention includes a wheel body 14 , a plurality of primary blades 11 and a plurality of secondary blades 12 .

[0034] The wheel body 14 is suitable for being connected to a power source, such as connecting the wheel body 14 to a motor 26, so that the motor 26 drives the wheel body 14 to rotate, and then during the rotation of the wheel body 14, the wind is guided through multiple primary blades 11 and multiple secondary blades 12, thereby playing the role of axial air intake and radial air outlet.

[0035] A plurality of primary blades 11 are distributed and spaced apart in the circumferential direction of the wheel body 14, and a primary airflow channel 111 is defined between two adjacent primary blades 11. A plurality of secondary blades 12 are distributed and spaced apart in the circumferential direction of the wheel body 14 and are located outside the plurality of primary blades 11. A secondary airflow channel 121 connected to the primary airflow channel 111 is defined between two adjacent secondary blades 12, and the outer edge of the primary blade 11 is connected to the inner edge of the secondary blade 12.

[0036] Thus, the plurality of primary blades 11 are located inside the plurality of secondary blades 12, and when actually guiding the wind, the airflow is guided radially outward from the radially inner part of the centrifugal wind wheel 1. In other words, when the centrifugal wind wheel 1 rotates, the airflow located radially inside the centrifugal wind wheel 1 first flows outward along the primary blades 11, and when further flowing to the secondary blades 12, flows outward along the secondary blades 12, that is, flows from the primary airflow flow channel 111 to the secondary airflow flow channel 121, realizing axial air intake and radial air outlet.

[0037] It should be noted that, during actual installation, the centrifugal wind wheel 1 is installed in the volute 2 of the fresh air module 100, and the volute 2 is provided with an air outlet 24 and an air inlet 23, and the air inlet 23 and the air outlet 24 are both located on the outer peripheral wall of the volute 2 and are spaced apart and distributed in the circumferential direction of the volute 2, wherein the air inlet 23 is connected with the axial direction of the centrifugal wind wheel 1, and the air flow at the air inlet 23 can enter the centrifugal wind wheel 1 along the axial direction of the centrifugal wind wheel 1 after passing through the filter module, and then flow outward along the radial direction of the centrifugal wind wheel 1 to the air outlet 24.

[0038] In this process, since the air inlet direction of the air inlet 23 is different from that of the centrifugal wind wheel 1, the flow direction of the airflow entering the centrifugal wind wheel 1 has a certain angle with the axial direction of the centrifugal wind wheel 1, that is, the flow direction of the airflow entering the centrifugal wind wheel 1 is chaotic. In the present invention, by arranging the first-level blades 11 and the second-level blades 12 distributed in sequence in the radial direction of the centrifugal wind wheel 1, the airflow can be rectified by the first-level blades 11 before being guided outward from the second-level blades 12, so that the airflow entering the second-level blades 12 is relatively uniform, the non-uniform flow is reduced, the backflow vortex noise between most of the blade paths is eliminated, the turbulent flow state is improved, and the noise is effectively reduced.

[0039] It should be noted that the outer edge of the primary blade 11 is connected to the inner edge of the secondary blade 12, that is, Figure 3 As shown, the outer edge of the primary blade 11 can be set to be connected to the inner edge of the secondary blade 12, that is, the airflow directed outward from the primary airflow channel 111 can be smoothly directed into the secondary airflow channel 121, and the airflow between the two does not need to pass through other structural parts, so that the airflow will not fluctuate during the derivation process, ensuring the stable derivation of the airflow and reducing the vibration noise of the airflow. And, the inner edge referred to in the present invention is the end close to the center of the wheel body 14, and the outer edge is the end away from the center of the wheel body 14.

[0040] According to the centrifugal wind wheel 1 of the embodiment of the present invention, by arranging a plurality of primary blades 11 and a plurality of secondary blades 12 on the centrifugal wind wheel 1, the flow state of the airflow on the centrifugal wind wheel 1 is significantly improved, the non-uniform flow is reduced, the rectification effect is achieved, and the turbulent flow state is improved, so that the vibration noise generated by the airflow in the process of flowing through the primary blades 11 and the secondary blades 12 is smaller, thereby reducing the overall noise of the air-conditioning equipment and improving the user experience.

[0041] In some embodiments, the number of the primary blades 11 is set to be less than the number of the secondary blades 12, such as setting the number of the primary blades 11 to be 0.25 times, 0.5 times, or other numbers of the number of the secondary blades 12. Figure 3 As shown, the number of the first-stage blades 11 can be 11, and the number of the second-stage blades 12 can be 44, or can be set to other numbers.

[0042] It should be noted that, during actual wind guidance, the multiple primary blades 11 can first guide the airflow entering axially from the centrifugal wind wheel 1, and then further guide it through the multiple secondary blades 12. In other words, the multiple primary blades 11 are configured to guide the airflow as a whole, and the multiple secondary blades 12 are refined to guide the airflow, so that the gas flow in the airflow channel is more uniform, and there will be no airflow chaos.

[0043] Specifically, Figure 3 As shown, the spacing between two adjacent primary blades 11 is greater than the spacing between two adjacent secondary blades 12. And a secondary blade 12 that is not connected to the primary blade 11 may be arranged between two adjacent primary blades 11. Specifically, Figure 3 As shown, three secondary blades 12 are provided between two adjacent primary blades 11, and the inner ends of the three secondary blades 12 are not connected to the primary blade 11. In other words, the width of the primary airflow channel 111 is greater than the width of the secondary airflow channel 121. Therefore, during the rotation of the centrifugal fan 1, the airflow state can be continuously adjusted through the primary airflow channel 111 and the secondary airflow channel 121 in sequence, thereby reducing non-uniform flow channels, reducing vortex noise, and reducing noise.

[0044] In some embodiments, the number of the primary blades 11 is N, and satisfies: 6≤N≤23. In other words, the number of the primary blades 11 can be set to 6, 23, or within the range of 6 to 23, such as 8, 14, or more, thereby the number of the primary blades 11 can be flexibly set to achieve the function of guiding and adjusting the intake airflow of the centrifugal wind wheel 1.

[0045] It should be noted that the number of the first-level blades 11 can be set accordingly according to the number of the second-level blades 12, so that the number of the first-level blades 11 will not be too many or too few compared to the second-level blades 12. When the number of the first-level blades 11 is small, it is easy to cause the width of the first-level airflow channel 111 to be larger, and the airflow guidance effect in the first-level airflow channel 111 cannot meet the requirements. When the number of the first-level blades 11 is large, although the guidance effect is better, the large number increases the setting cost and the processing difficulty. Also, when the centrifugal wind wheel 1 rotates, if the number of the first-level blades 11 is small, it is easy to cause the fundamental frequency of the noise caused by the rotation of the first-level blades 11 to transfer from the high frequency area to the low frequency area, and the increase in low-frequency noise will worsen the hearing. If the number of the first-level blades 11 is large, the small pitch of the first-level blades 11 will cause local blockage of the inlet, large airflow intake resistance, and a certain degree of attenuation of the air volume.

[0046] Therefore, by setting the number of primary blades 11 within the above range, the guiding effect of the primary airflow channel 111 can be ensured, vibration noise can be effectively reduced, and problems such as large air intake resistance and excessively high setting costs will not be caused.

[0047] In some embodiments, N>11, that is, in a preferred design, the number of primary blades 11 can be set to be greater than 11 and less than or equal to 23, such as 15, 18, or 20.

[0048] In this way, the width of the primary airflow channel 111 can be set evenly, forming an effective guiding effect, reducing noise, and avoiding a small pitch of the primary blade 11, preventing air intake blockage, and ensuring smooth air intake.

[0049] In some embodiments, the channel width of the primary airflow channel 111 is set to gradually increase from the inside to the outside, or first gradually decrease or then gradually increase from the inside to the outside. That is, the channel width of the primary airflow channel 111 is set to gradually increase from one end close to the center of the wheel body 14 to the end connected to the secondary airflow channel 121, or first gradually decrease or then gradually increase from one end close to the center of the wheel body 14 to the end connected to the secondary airflow channel 121, so that the airflow in the central area of ​​the wheel body 14 passes through the narrower position of the primary airflow channel 111 for rectification, so that the airflow flows smoothly to the secondary airflow channel 121 as the primary airflow channel 111 gradually widens.

[0050] Specifically, when the airflow in the central area of ​​the wheel body 14 enters the primary airflow channel 111, it is effectively rectified by the primary blades 11, so that the flow direction of the airflow in the central area of ​​the wheel body 14 enters the primary airflow channel 111 from chaotic to orderly, so that the airflow in the primary airflow channel 111 can enter the secondary airflow channel 121 more evenly, reducing the non-uniform flow in the secondary airflow channel 121.

[0051] In some embodiments, the ratio of the outer edge width to the inner edge width of the first-level airflow channel 111 is 1.4 to 2.1, that is, the outer edge width of the first-level airflow channel 111 is greater than the inner edge width of the first-level airflow channel 111, and the width ratio of the two is between 1.4 and 2.1, such as the ratio is set to 1.6, 1.8, etc. In other words, the first-level airflow channel 111 is set to gradually increase from the inside to the outside, and a fixed flow direction can be formed during the airflow flow process to enter the secondary airflow channel 121.

[0052] In other words, the rectified airflow in the primary airflow channel 111 may flow radially outwards, such as Figure 1 As shown, a plurality of secondary airflow channels 121 are correspondingly formed on the outer side of each primary airflow channel 111, that is, the airflow rectified by the primary airflow channel 111 can be smoothly diffused into the plurality of secondary airflow channels 121, so that it will not enter the secondary airflow channel 121 in a disorderly manner to form a non-uniform flow, thereby effectively reducing the vibration noise generated during the rotation of the centrifugal impeller 1.

[0053] In some embodiments, one of two adjacent primary blades 11 is arranged to gradually approach the other from the outer edge to the inner edge, that is, the primary blade 11 is arranged to extend from the inside to the outside along the radial direction of the wheel body 14, and the inner edge is circumferentially inclined relative to the outer edge. Thus, through this structural setting, the width of the primary airflow channel 111 formed between two adjacent primary blades 11 can be gradually increased from the inner edge to the outer edge.

[0054] When the centrifugal impeller 1 rotates, when the airflow enters the primary airflow channel 111, it can first contact the inner edge of the primary blade 11, so as to be guided into the primary airflow channel 111 through the inner edge of the primary blade 11, and then be guided along the inner wall of the primary airflow channel 111, that is, the two primary blades 11 are guided toward each other's sides, and form a radial diffusion to the corresponding secondary airflow channel 121.

[0055] In some embodiments, both the primary blade 11 and the secondary blade 12 are constructed as arc-shaped blades. In other words, the surface of the primary blade 11 and the surface of the secondary blade 12 are smooth curved surfaces. That is, when the primary blade 11 and the secondary blade 12 guide the airflow, no vibration will be generated due to convex deformation of the surface.

[0056] Specifically, Figure 1 As shown, the primary blade 11 has a smooth wind-guiding curved surface, which can smoothly guide the airflow, and the guided airflow can enter the wind-guiding curved surface of the secondary blade 12, and then be smoothly guided from the wind-guiding curved surface of the secondary blade 12, thereby achieving uniform guidance of the airflow.

[0057] The plurality of primary blades 11 and the plurality of secondary blades 12 are respectively distributed in a spiral manner, and the rotation direction of the plurality of primary blades 11 is opposite to the rotation direction of the plurality of secondary blades 12. Figure 1 As shown, multiple primary blades 11 are located on the inner side of multiple secondary blades 12, and the multiple primary blades 11 are bent and extended in a counterclockwise direction on the inner side, and the multiple secondary blades 12 are bent and extended in a clockwise direction on the outer side. Therefore, the airflow at the centrifugal wind wheel 1 can flow outward in an S shape through the primary airflow channel 111 and the secondary airflow channel 121, thereby achieving a rectifying effect.

[0058] In some embodiments, multiple primary blades 11 are evenly spaced apart in the circumferential direction of the wheel body 14, that is, the spacing between each primary blade 11 is relatively uniform, so that the flow-guiding effect of each primary blade 11 in the circumferential direction of the wheel body 14 is more uniform, that is, it is ensured that the airflow at each position in the circumferential direction can be stably guided to the corresponding secondary airflow channel 121.

[0059] And / or, multiple secondary blades 12 are evenly spaced apart in the circumferential direction of the wheel body 14, that is, the spacing between each secondary blade 12 is relatively uniform, so that the guiding effect of each secondary blade 12 in the circumferential direction of the wheel body 14 is more uniform, that is, it is ensured that the airflow at each primary airflow channel 111 in the circumferential direction can be stably guided into the corresponding secondary airflow channel 121, so that the airflow guided out at each circumferential position of the centrifugal wind wheel 1 is relatively uniform.

[0060] Specifically, Figure 3 As shown, there are 11 primary blades 11, and the 11 primary blades 11 are evenly spaced apart in the circumferential direction of the wheel body 14. At the same time, there are 44 secondary blades 12, and the 44 secondary blades 12 are evenly spaced apart in the circumferential direction of the wheel body 14. A secondary blade 12 is connected to the outer side of each primary blade 11, and three secondary blades 12 that are not connected to the primary blades 11 are spaced apart and distributed between two adjacent primary blades 11. In this way, not only the overall structure of the centrifugal wind wheel 1 is made more regular, ensuring the circumferential flow guidance effect, but also the regular structure is conducive to reducing the difficulty of processing.

[0061] In some embodiments, the thickness of the primary blade 11 is set to gradually increase from the outer edge to the inner edge. Figure 3 As shown, the width of the inner edge of the primary blade 11 is smaller and the width of the outer edge is larger. In other words, the structural strength of the inner edge of the primary blade 11 is greater than the structural strength of the outer edge of the primary blade 11 .

[0062] It is understandable that the centrifugal wind wheel 1 is constructed to have axial air intake and radial air outlet. The chaotic airflow in the middle area of ​​the centrifugal wind wheel 1 has a greater impact on the primary blade 11. The thickness of the primary blade 11 is set to gradually increase from the outer edge to the inner edge, so that the inner edge of the primary blade 11 has a greater structural strength and can effectively guide the airflow, and will not produce a large amplitude of vibration under the impact of the airflow in the central area, thereby ensuring the effect of airflow introduction. At the same time, it also prevents the inner edge of the primary blade 11 from serious structural deformation when subjected to long-term force impact.

[0063] In some embodiments, an arc-shaped transition section 13 is formed at the connection between the primary blade 11 and the secondary blade 12, that is, the primary blade 11 and the secondary blade 12 are smoothly connected through the arc-shaped transition section 13, such as Figure 1 As shown, the arc-shaped transition section 13 is smoothly connected to the outer edge of the primary blade 11 and the inner edge of the secondary blade 12, that is, no abrupt bending angle is formed at the connection between the primary blade 11 and the secondary blade 12. As a result, the airflow in the primary airflow channel 111 can smoothly enter the secondary airflow channel 121, avoiding sudden changes in the airflow direction at the bending angle, achieving smooth airflow discharge, and reducing airflow impact noise.

[0064] In some embodiments, in the radial direction of the wheel body 14, the projection of the primary blade 11 coincides with that of the secondary blade 12 located on the outside thereof. For example, a plurality of secondary blades 12 are provided on the outside of the primary blade 11, and the primary blade 11 and the plurality of secondary blades 12 are directly opposite to each other in the radial direction of the wheel body 14. In this way, the airflow guided by the primary blade 11 can enter the secondary airflow channel 121 formed between the corresponding plurality of secondary blades 12, thereby realizing effective airflow outlet.

[0065] like Figure 1 As shown, four secondary blades 12 are correspondingly arranged on the outer side of each primary blade 11, and the airflow in the primary airflow channel 111 defined by the primary blade 11 and the adjacent primary blades 11 can be guided to the three secondary airflow channels 121 defined between the four secondary blades 12 located on its outer side, so as to achieve uniform airflow guidance and reduce non-uniform flow.

[0066] The invention also provides an air conditioning device.

[0067] The air conditioning device according to the embodiment of the present invention comprises the centrifugal fan wheel 1 of any one of the above embodiments, wherein the centrifugal fan wheel 1 can be arranged in the fresh air module 100 of the air conditioning device, such as Figure 1 and Figure 2 As shown, the fresh air module 100 includes a volute 2 and a centrifugal wind wheel 1, the volute 2 includes a left volute 21 and a right volute 22, the left volute 21 and the right volute 22 jointly define an air duct 27 and an air outlet 24, the centrifugal wind wheel 1 is rotatably installed in the installation space, the left volute 21 is provided with an air inlet 23, wherein the left volute 21 is connected to a left soundproof cover 211, and a left sound-absorbing cotton 212 and a filter bracket are provided between the left volute 21 and the left soundproof cover 211 25. The filter bracket 25 is installed with a filter 251, and the filter 251 is used to filter the airflow at the air inlet 23. The right volute 22 is connected to the right sound insulation cover 221. The right volute 22 is installed with a motor 26. The motor 26 is connected to the centrifugal wind wheel 1 and is used to drive the centrifugal wind wheel 1 to rotate. A right sound-absorbing cotton 222 is provided between the right volute 22 and the right sound insulation cover 221. Therefore, the overall noise of the fresh air module 100 can be reduced by arranging the sound-absorbing cotton.

[0068] Among them, by setting the above-mentioned centrifugal wind wheel 1, the flow state of the airflow on the centrifugal wind wheel 1 can be significantly improved, the non-uniform flow can be reduced, the rectification effect can be achieved, and the turbulent flow state can be improved, so that the vibration noise generated by the airflow during the flow through the first-level blades 11 and the second-level blades 12 is smaller, thereby reducing the overall noise of the air-conditioning equipment and improving the user experience.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A centrifugal wind wheel, characterized in that: include: Wheel body; A plurality of primary blades, wherein the plurality of primary blades are spaced apart and distributed in the circumferential direction of the wheel body, and a primary airflow channel is defined between two adjacent primary blades; A plurality of secondary blades are arranged spaced apart in the circumferential direction of the wheel body and are located outside the plurality of primary blades, a secondary airflow channel connected to the primary airflow channel is defined between two adjacent secondary blades, and the outer edge of the primary blade is connected to the inner edge of the secondary blade.

2. The centrifugal wind wheel according to claim 1, characterized in that: The number of the primary blades is set to be smaller than the number of the secondary blades.

3. The centrifugal wind wheel according to claim 2, characterized in that: The number of the primary blades is N, and satisfies: 6≤N≤23.

4. The centrifugal wind wheel according to claim 3, characterized in that: N＞11。 5. The centrifugal wind wheel according to claim 1, characterized in that: The flow channel width of the primary air flow channel is configured to gradually increase from the inside to the outside, or to first gradually decrease or then gradually increase from the inside to the outside.

6. The centrifugal wind wheel according to claim 1, characterized in that: The ratio of the outer edge width to the inner edge width of the primary airflow channel is 1.4 to 2.

1.

7. The centrifugal wind wheel according to claim 1, characterized in that: One of the two adjacent primary blades is arranged to gradually approach the other from the outer edge to the inner edge.

8. The centrifugal wind wheel according to claim 1, characterized in that: The primary blades and the secondary blades are both constructed as arc-shaped blades, and the plurality of primary blades and the plurality of secondary blades are respectively distributed in a spiral, and the rotation direction of the plurality of primary blades is opposite to the rotation direction of the plurality of secondary blades.

9. The centrifugal wind wheel according to claim 1, characterized in that: The plurality of primary blades are evenly spaced apart in the circumferential direction of the wheel body; And / or, the plurality of secondary blades are evenly spaced apart in the circumferential direction of the wheel body.

10. The centrifugal wind wheel according to claim 1, characterized in that: The thickness of the primary blade is configured to gradually increase from the outer edge to the inner edge.

11. The centrifugal wind wheel according to claim 1, characterized in that: An arc-shaped transition section is formed at the connection between the primary blade and the secondary blade.

12. The centrifugal wind wheel according to claim 1, characterized in that: In the radial direction of the wheel body, the projection of the primary blade coincides with the projection of the secondary blade located outside the primary blade.

13. An air conditioning device, characterized in that: It comprises the centrifugal wind wheel according to any one of claims 1-12.

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