Wind wheel, fan and air conditioner indoor unit

Abstract

The utility model provides a wind wheel, a draught fan and an air conditioner indoor unit, and the wind wheel comprises a supporting part used for being connected with a motor shaft of the draught fan, the supporting part is provided with a first side and a second side which are oppositely arranged in the axial direction of the supporting part, and the supporting part is provided with a ventilation hole penetrating through the first side and the second side; the first fan blades are arranged on the first side and are arranged at intervals in the circumferential direction of the supporting part; and the multiple second fan blades are arranged on the second side and are arranged at intervals in the circumferential direction of the supporting part. The first fan blades and the second fan blades are arranged on the first side and the second side respectively, the ventilation holes communicating the first side with the second side are formed at the same time, part of airflow axially flowing into the first side (or part of airflow axially flowing into the second side) is guided to the second side (or the first side), axial air inlet is increased, airflow flowing is optimized, and backflow and correspondingly generated noise are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a wind wheel, a fan and an air conditioner indoor unit. BACKGROUND

[0002] When the centrifugal fan is started, a negative pressure is formed at the center of the hub, and the surrounding air enters from the meridian plane of the fan blade and then is discharged radially along the air duct. However, the part of the blade close to the rear disc is far away from the meridian plane, so that the axial air intake is insufficient, the pressure potential is low, and backflow of exhaust gas and the corresponding noise are prone to occur. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a wind wheel, a fan and an air conditioner indoor unit to solve the technical problem of backflow of exhaust gas of the fan rear disc.

[0004] To achieve the above-mentioned purpose, the present application provides a wind wheel, comprising:

[0005] A support part is used for connecting with the motor shaft of the fan, the support part has a first side and a second side which are oppositely arranged along the axial direction of the support part, and the support part is provided with a ventilation hole penetrating through the first side and the second side;

[0006] A plurality of first blades are arranged on the first side and are spaced apart along the circumferential direction of the support part; and

[0007] A plurality of second blades are arranged on the second side and are spaced apart along the circumferential direction of the support part.

[0008] Optionally, in an embodiment, the plurality of first blades and the plurality of second blades are equally spaced apart along the circumferential direction of the support part, and the projection of the plurality of second blades on the second side is located between the plurality of first blades along the axial direction of the support part.

[0009] Optionally, in an embodiment, the length of any one of the first blades is greater than the length of any one of the second blades along the axial direction of the support part, and the plurality of first blades are directed to the air inlet side of the wind wheel.

[0010] Optionally, in an embodiment, the thickness of any one of the first blades is equal to the thickness of any one of the second blades along the circumferential direction of the support part.

[0011] Optionally, in an embodiment, the ventilation hole is provided with a plurality of ventilation holes, and the plurality of ventilation holes are located between the plurality of first blades and the rotating shaft of the support part, and are located between the plurality of second blades and the rotating shaft of the support part.

[0012] Optionally, in an embodiment, a plurality of spaced ventilation areas are provided along the circumferential direction of the support portion, and each of the ventilation areas is provided with a plurality of ventilation holes; the distance between adjacent ventilation areas along the circumferential direction of the support portion is equal or unequal.

[0013] Optionally, in an embodiment, the plurality of ventilation holes of each of the ventilation areas are equidistantly arranged along the circumferential direction of the support portion.

[0014] Optionally, in an embodiment, the plurality of ventilation holes are arranged in a staggered manner with the plurality of first blades along the radial direction of the support portion.

[0015] Optionally, in an embodiment, the plurality of ventilation holes are arranged in an opposite manner with the plurality of first blades along the radial direction of the support portion.

[0016] Optionally, in an embodiment, part of the plurality of ventilation holes are arranged in a staggered manner with the plurality of first blades along the radial direction of the support portion, and part of the plurality of ventilation holes are arranged in an opposite manner with the plurality of first blades along the radial direction of the support portion.

[0017] Optionally, in an embodiment, the ventilation holes gradually increase in size in a direction radially outward of the support portion.

[0018] Optionally, in an embodiment, the plurality of ventilation holes are of the same or different sizes.

[0019] Optionally, in an embodiment, the plurality of ventilation holes of each of the ventilation areas gradually increase in size along the circumferential direction of the support portion.

[0020] Optionally, in an embodiment, the plurality of ventilation holes of each of the ventilation areas gradually increase in size in a direction from the two ends of the ventilation area to the middle of the ventilation area.

[0021] The application further provides a fan, comprising the above-mentioned impeller, volute and motor, wherein the impeller and the motor are arranged in the volute, the motor is used to drive the impeller to rotate, and the volute is provided with an air outlet in the radial direction of the impeller.

[0022] The application further provides an air conditioner indoor unit, comprising the above-mentioned impeller or the above-mentioned fan.

[0023] The application provides an impeller, which is provided with first blades and second blades on the first side and the second side of the support portion respectively, and is further provided with ventilation holes communicating the first side and the second side, so as to guide part of the airflow (or part of the airflow of the second side) flowing in the axial direction to the second side (or the first side), increase the axial inlet air, optimize the airflow flow, and reduce the backflow and the corresponding noise. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0025] Figure 1 It is a perspective view of the wind wheel of the present application.

[0026] Figure 2 It is a front view of the wind wheel of the present application.

[0027] Figure 3 It is a perspective view of the wind wheel of the present application.

[0028] Figure 4 It is a front view of the wind wheel of the present application.

[0029] Figure 5 It is a front view of the wind wheel of the present application.

[0030] Figure 6 It is a front view of the wind wheel of the present application.

[0031] Figure 7 It is a front view of the wind wheel of the present application.

[0032] Figure 8 It is a front view of the wind wheel of the present application.

[0033] Figure 9 It is a front view of the wind wheel of the present application.

[0034] Figure 10 It is a front view of the wind wheel of the present application.

[0035] Explanation of the reference signs:

[0036] 1, support part; 11, hub subpart; 12, disc subpart; 121, ventilation area; 1211, ventilation hole; 13, first side; 14, second side; 2, first fan blade; 3, second fan blade.

[0037] The implementation, functional features and advantages of the present application will be further illustrated in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made, belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional 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 devices or elements indicated must have a unique orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0040] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0042] The use of "adapted for" or "configured for" in the present application means open and inclusive language that does not exclude devices adapted for or configured to perform additional tasks or steps. In addition, the use of "based on" means open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values can be based on additional conditions or values beyond those stated in practice.

[0043] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the application. Details are set forth in the following description for purpose of explanation. It should be appreciated that one of ordinary skill in the art will readily recognize that the application can be practiced without the use of these specific details. In other instances, well-known structures and processes have not been described in detail in order to avoid obscuring the description of the application. Thus, the present application is not intended to be limited by the embodiments shown, but is to be accorded with the widest scope consistent with the principles and features disclosed.

[0044] In the field of fan, the wind wheel usually includes a plurality of blades, a front disc, a rear disc and a hub; wherein the hub usually refers to the part directly connected with the motor shaft of the fan, the rear disc is connected on the outer side of the hub and directly connected with the blades, the front disc is located on the air inlet side of the blades and connects the plurality of blades, and the front disc and the rear disc jointly fix the blades in the axial direction of the hub.

[0045] When the centrifugal fan is started, a negative pressure is formed in the center of the hub, and the surrounding air enters between the hub and the blades from the meridian plane of the fan blades (the meridian plane refers to a plane perpendicular to the rotation axis of the blades and containing the edge of the air inlet side of the impeller), and the fluid pressure rapidly rises as the blades work. The airflow near the front disc mainly moves in the axial direction, and when the airflow moves to the middle of the blades and near the rear disc, it mainly moves in the radial direction. The part of the blade near the rear disc has insufficient axial air intake, resulting in a decrease in pressure in the blade channel of the rear disc blade, thereby causing a large area of low-speed zone in the area outside the centrifugal fan and near the rear disc, and flow instability and other phenomena occur, which easily causes backflow and vortex. The turbulent flow generated by the centrifugal fan is easy to collide with the chamber where it is located periodically and cause pressure pulsation, resulting in low-frequency oscillation or resonance.

[0046] The embodiment of the present application provides a wind wheel to solve the problem of backflow of the rear disc exhaust of the fan. The following will be described with reference to the accompanying drawings.

[0047] In the embodiment of the present application, as shown in Figure 1 and Figure 2 The wind wheel comprises:

[0048] A support part 1 is used for connecting with the motor shaft of the fan, and the support part 1 has a first side 13 and a second side 14 oppositely arranged in the axial direction of the support part 1, and the support part 1 is provided with a ventilation hole 1211 penetrating through the first side 13 and the second side 14;

[0049] A plurality of first blades 2 are arranged on the first side 13 and are arranged at intervals in the circumferential direction of the support part 1; and

[0050] A plurality of second blades 3 are arranged on the second side 14 and are arranged at intervals in the circumferential direction of the support portion 1.

[0051] It should be noted that the support portion 1 refers to a structure for supporting the first blades 2 and the second blades 3 and for connecting with the motor shaft of the fan. Specifically, the support portion 1 can refer to a hub or a rear disc, or a structure including the hub and the rear disc.

[0052] The fan refers to a centrifugal fan, which includes a motor and the above-mentioned impeller. The motor shaft of the motor is coaxially connected with the support portion 1 of the impeller to drive the impeller to rotate. The circumferential direction of the support portion 1 refers to the circumferential direction of the support portion 1 with the rotation axis of the support portion 1 as the central axis. The arrangement at intervals in the circumferential direction of the support portion 1 can refer to equal interval arrangement or unequal interval arrangement.

[0053] It can be understood that by arranging a plurality of first blades 2 and a plurality of second blades 3 on the first side 13 and the second side 14 respectively, and at the same time arranging the ventilation holes 1211 on the support portion 1 to communicate the first side 13 and the second side 14, the axial air inlet is increased. Specifically, if the first side 13 faces the air inlet side of the impeller, part of the axial air inlet of the first side 13 enters the second side 14 through the ventilation holes 1211, which improves the axial air inlet of the second side 14, promotes the airflow to be more evenly distributed in the axial direction of the impeller, increases the air volume, reduces the backflow of the exhaust air, and thus reduces the noise caused by unstable airflow. At the same time, part of the axial air inlet of the first side 13 is discharged along the air duct between the plurality of first blades 2 under the action of centrifugal force. Similarly, if the second side 14 faces the air inlet side of the impeller, the axial air inlet of the second side 14 can be improved.

[0054] In some embodiments, as shown in Figure 1 and Figure 2 The plurality of first blades 2 and the plurality of second blades 3 are arranged at equal intervals in the circumferential direction of the support portion 1. In the axial direction of the support portion 1, the projection of the plurality of second blades 3 on the second side 14 is located between the plurality of first blades 2.

[0055] It should be noted that the projection of the plurality of second blades 3 on the second side 14 refers to an artificial virtual projection, and the projection does not actually exist on the second side 14.

[0056] It can be understood that, along the axial direction of the support portion 1, the plurality of first blades 2 and the plurality of second blades 3 are staggered, and the plurality of first blades 2 and the plurality of second blades 3 form air ducts extending from inside to outside on the support portion 1, and because the plurality of first blades 2 and the plurality of second blades 3 are staggered in the axial direction of the support portion 1, the airflow can be better diffused in the axial direction of the support portion 1 after flowing out of the air ducts on the first side 13 and the air ducts on the second side 14, thereby reducing disturbance between the airflows in the axial direction of the support portion 1 as much as possible, and making the fan have more uniform radial air outlet.

[0057] In other embodiments, the plurality of first blades 2 and the plurality of second blades 3 are arranged at equal intervals in the circumferential direction of the support portion 1; along the axial direction of the support portion 1, the projection of the plurality of second blades 3 on the second side 14 completely overlaps or partially overlaps the projection of the plurality of first blades 2 on the first side 13.

[0058] It should be noted that the projection of the plurality of second blades 3 on the second side 14 and the projection of the plurality of first blades 2 on the first side 13 both refer to artificial virtual projections, and the projections do not actually exist on the second side 14 and the first side 13. Various arrangements of the first blades 2 and the second blades 3 can be provided according to actual conditions.

[0059] In some embodiments, as shown in Figure 1 and Figure 3 along the axial direction of the support portion 1, the length of any first blade 2 is greater than the length of any second blade 3, and the plurality of first blades 2 are towards the air inlet side of the fan.

[0060] It should be noted that the air outlet side is opposite to the air inlet side and is located in the radial direction of the fan. In the fan, the airflow flows along the axial direction of the support portion 1 to between the plurality of first blades 2, part of the airflow is discharged between the plurality of first blades 2 under the action of centrifugal force, and part of the airflow further flows along the axial direction of the support portion 1 and passes through the ventilation hole 1211.

[0061] It can be understood that the first blades 2 towards the air inlet side have a longer length than the second blades 3, which can ensure the degree of acceleration and pressurization of the airflow between the plurality of first blades 2, and ensure the wind pressure of the fan; at the same time, the airflow flow rate from the ventilation hole 1211 to the second side 14 is improved.

[0062] Specifically, along the axial direction of the support portion 1, the lengths of the plurality of first blades 2 are equal, the lengths of the plurality of second blades 3 are equal, and the lengths of the plurality of first blades 2 are greater than the lengths of the plurality of second blades 3. In this way, the wind pressure of the fan can be ensured, and the stability of the airflow can be improved.

[0063] In some embodiments, as shown in Figure 1 and Figure 3As shown, the thickness of any first fan blade 2 is equal to the thickness of any second fan blade 3 along the circumferential direction of the support portion 1.

[0064] It should be noted that, as the projections of the plurality of second fan blades 3 on the second side 14 are located between the plurality of first fan blades 2, and the thickness of any first fan blade 2 is equal to the thickness of any second fan blade 3 along the circumferential direction of the support portion 1, it can be known that the size of the air ducts between the plurality of first fan blades 2 is equal to the size of the air ducts between the plurality of second fan blades 3, i.e. the flow area is consistent, which is conducive to maintaining the stability of the flow field, reducing backflow, and reducing noise.

[0065] In some embodiments, as shown, the plurality of ventilation holes 1211 are located between the plurality of first fan blades 2 and the rotation shaft of the support portion 1, and between the plurality of second fan blades 3 and the rotation shaft of the support portion 1.

[0066] It can be understood that the plurality of ventilation holes 1211 increase the axial air inflow to the plurality of second fan blades 3, while stabilizing the air flow distribution to the plurality of second fan blades 3 and reducing friction.

[0067] In some embodiments, as shown in Figure 1 and Figure 2 the plurality of ventilation holes 1211 are equally spaced along the circumferential direction of the support portion 1.

[0068] It can be understood that equally spacing the plurality of ventilation holes 1211 can greatly improve the stability of the air flow to the plurality of second fan blades 3, reduce turbulence, and improve the stability of the support portion 1; at the same time, it can balance the air outflow of the air ducts between the plurality of second fan blades 3, stabilize the flow field outside the fan, reduce backflow, and reduce noise.

[0069] In some embodiments, as shown in Figure 3 and Figure 4 the support portion 1 has a plurality of spaced ventilation areas 121 along the circumferential direction, each ventilation area 121 has a plurality of ventilation holes 1211; the distance between adjacent ventilation areas 121 along the circumferential direction of the support portion 1 can be equal or unequal.

[0070] It should be noted that the ventilation area 121 refers to a virtual area artificially defined to distinguish the ventilation holes 1211 located in different ventilation areas 121. The number of ventilation holes 1211 in different ventilation areas 121 can be equal or unequal, and the shape can be the same or different.

[0071] It can be understood that when the number of air vents 1211 in different ventilation areas 121 is equal and the shape is the same, by equally spacing the plurality of ventilation areas 121, the uniformity of airflow distribution can be greatly improved, the airflow resistance is reduced, the turbulence and friction are reduced, the turbulent kinetic energy distribution is more uniform, thereby reducing the periodic strong aerodynamic excitation caused by the concentration of turbulent energy, effectively improving the periodic pressure pulsation noise.

[0072] In some embodiments, as shown in Figure 4 and Figure 5 , the plurality of air vents 1211 of each ventilation area 121 are equally spaced circumferentially along the support part 1. In this way, the uniformity of airflow distribution in each ventilation area 121 can be improved. It can be imagined that the spacing distance between the plurality of air vents 1211 in different ventilation areas 121 can be the same or different, preferably the same spacing is adopted, further improving the uniformity of airflow distribution of the entire fan.

[0073] In some embodiments, as shown in Figure 6 , the plurality of air vents 1211 are arranged opposite to the plurality of first blades 2 radially along the support part 1.

[0074] It can be understood that by arranging the axial air inlet opposite to the air duct between the plurality of first blades 2 radially along the support part 1, the air directly discharged through the air vent 1211 to the air duct between the plurality of second blades 3 reduces the influence of part of the axial air inlet entering the air duct between the plurality of first blades 2 under the action of centrifugal force.

[0075] Further, it is not difficult to find from the foregoing embodiments that since the plurality of air vents 1211 are arranged opposite to the plurality of first blades 2, the plurality of air vents 1211 are arranged opposite to the air duct between the plurality of second blades 3 radially along the support part 1, the airflow enters the air duct between the plurality of second blades 3 more quickly under the action of centrifugal force, reducing the friction and collision between the second blades 3, improving the stability of the fan, and reducing noise.

[0076] In some embodiments, as shown in Figure 5 , the plurality of air vents 1211 are arranged opposite to the plurality of first blades 2 radially along the support part 1. It can be understood that the airflow entering the plurality of second blades 3 through the air vent 1211 is opposite to the air duct between the plurality of second blades 3. The relative positional relationship between the air vent 1211 and the plurality of first blades 2 can be selected according to actual conditions to provide more choices for actual production.

[0077] In some embodiments, as shown in Figure 7 and Figure 8As shown, along the radial direction of the support part 1, some of the ventilation holes 1211 are arranged opposite to the plurality of first blades 2, and some of the ventilation holes 1211 are arranged staggered to the plurality of first blades 2. It can be understood that the relative position relationship between the ventilation holes 1211 and the plurality of first blades 2 can be selected according to actual conditions to provide more choices for actual production.

[0078] In some embodiments, as shown in Figure 2 As shown, along the radial direction outward of the support part 1, the ventilation holes 1211 gradually increase in size. In this way, the axial air intake between the plurality of second blades 3 can be increased, the air flow resistance can be reduced, and the turbulence and friction can be reduced.

[0079] Exemplarily, along the radial direction of the support part 1, the two side walls inside the ventilation hole 1211 can adopt an arc-shaped structure or a planar structure; along the circumferential direction of the support part 1, the two side walls inside the ventilation hole 1211 can adopt a planar structure, and the included angle between the side wall arranged towards the center of the support part 1 and its adjacent side wall along the radial direction of the support part 1 is 85°-88°.

[0080] Further, the support part 1 comprises a hub sub-part 11 and a disc sub-part 12 connected to the outside of the hub sub-part 11, the hub sub-part 11 is used for direct coaxial connection with the motor shaft of the fan, the disc sub-part 12 is connected between the plurality of first blades 2 and the plurality of second blades 3, and the plurality of ventilation holes 1211 are arranged in the disc sub-part 12.

[0081] Along the radial direction of the support part 1, the height of any one of the ventilation holes 1211 is d, and if the radial distance between the plurality of first blades 2 and the rotating shaft of the support part 1 is equal, then the radial distance between any one of the first blades 2 and the outside of the hub sub-part 11 is h, and d≤1 / 2h. In this way, the air flow can be stabilized, the air flow resistance can be reduced, and the turbulence and friction can be reduced.

[0082] In some embodiments, as shown in Figure 4 , Figure 9 and Figure 10 As shown, the plurality of ventilation holes 1211 can be of the same size or different sizes. The size of the ventilation holes 1211 can be selected according to actual conditions, and when the plurality of ventilation holes 1211 are of the same size, the air flow can be stabilized and the flow field distribution can be uniform. When the plurality of ventilation holes 1211 are of different sizes, more choices can be provided for actual production.

[0083] In some embodiments, as shown in Figure 10 As shown, along the circumferential direction of the support part 1, the size of the plurality of ventilation holes 1211 of each ventilation area 121 gradually increases.

[0084] It can be understood that there are two cases, the first case is that the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1. The second case is that the plurality of ventilation holes 1211 are not located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1.

[0085] Further, the support part 1 is centrally symmetric about the rotation axis thereof. In this way, the airflow can be stabilized, the airflow resistance can be reduced, and the turbulence and friction can be reduced.

[0086] Further, along the radial direction of the support part 1, the height of any one of the plurality of ventilation holes 1211 is d, and if the radial distance between the plurality of first blades 2 and the rotation axis of the support part 1 is equal, then the radial distance between any one of the plurality of first blades 2 and the outer side of the hub subpart 11 is h, and d≤1 / 2h. Thus, the airflow can be further stabilized, the airflow resistance can be reduced, and the turbulence and friction can be reduced.

[0087] Further, the plurality of ventilation holes 1211 are arranged close to the first blades 2. In combination with the foregoing description of the embodiments, since the ventilation holes 1211 are located between the first blades 2 and the rotation axis of the support part 1 and between the second blades 3 and the rotation axis of the support part 1, the ventilation holes 1211 arranged close to the first blades 2 are also close to the second blades 3, so that the axial air inlet can quickly enter the air duct between the plurality of second blades 3 under the action of the centrifugal force.

[0088] In some embodiments, as shown in FIGS. 1A and 1B, the size of each ventilation hole 1211 gradually increases from the two ends of the ventilation area 121 to the middle part of the ventilation area 121. Figure 4 and Figure 9 It should be noted that the “ventilation area 121” refers to the ventilation area 121 to which the ventilation hole 1211 belongs, the “two ends of the ventilation area 121” refer to the two ends of the ventilation area 121 along the circumferential direction of the fan, and the “middle part” refers to a part of the structure relative to the two ends of the ventilation area 121.

[0089] It should be noted that the “ventilation area 121” refers to the ventilation area 121 to which the ventilation hole 1211 belongs, the “two ends of the ventilation area 121” refer to the two ends of the ventilation area 121 along the circumferential direction of the fan, and the “middle part” refers to a part of the structure relative to the two ends of the ventilation area 121.

[0090] It can be understood that there are three cases, the first case is that the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1. The second case is that the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1. The third case is that the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1, and the plurality of ventilation holes 1211 are located on the same circumferential line of the support part 1.

[0091] The present application provides the following embodiments, embodiment 1, the support part 1 comprises a hub sub 11 and a wheel disc sub 12 connected to the outside of the hub sub 11, the hub sub 11 is used for coaxial connection with the motor shaft of the fan, the wheel disc sub 12 is connected between the plurality of first blades 2 and the plurality of second blades 3, and the plurality of ventilation holes 1211 are arranged on the wheel disc sub 12.

[0092] The wheel disc sub 12 has a plurality of ventilation holes 1211 arranged at equal intervals along the circumferential direction of the wheel disc sub 12, the shapes of the plurality of ventilation holes 1211 are the same, and each ventilation hole 1211 is arranged opposite to the first blade 2.

[0093] Embodiment 2, which is different from embodiment 1, is that each ventilation hole 1211 is arranged opposite to the first blade 2.

[0094] Embodiment 3, as shown in Figure 4 The wheel disc sub 12 has three ventilation regions 121 arranged at unequal intervals along the circumferential direction of the wheel disc sub 12, the shapes of the ventilation holes 1211 in the three ventilation regions 121 are different, the ventilation holes 1211 in each ventilation region 121 are arranged at equal intervals along the circumferential direction of the wheel disc sub 12, the intervals between adjacent ventilation holes 1211 in the three ventilation regions 121 are equal, part of the ventilation holes 1211 are arranged opposite to the first blade 2, and part of the ventilation holes 1211 are arranged opposite to the first blade 2.

[0095] Embodiment 4, as shown in Figure 5As shown, the difference from Embodiment 1 is that: the wheel plate portion 12 has three ventilation areas 121 arranged at unequal intervals along its own circumference. The number of ventilation holes 1211 in the three ventilation areas 121 is the same, the shape of the ventilation holes 1211 in the three ventilation areas 121 is the same, the ventilation holes 1211 in each ventilation area 121 are arranged at equal intervals along the circumference of the wheel plate portion 12, the interval between adjacent ventilation holes 1211 in the three ventilation areas 121 is equal, and all ventilation holes 1211 are arranged opposite to the first fan blade 2.

[0096] Example 5, as Figure 6 As shown, the difference from Embodiment 4 is that the wheel plate portion 12 has three ventilation areas 121 arranged at unequal intervals along its own circumference, and all ventilation holes 1211 are staggered with the first fan blade 2.

[0097] Example 6, as Figure 7 As shown, the difference from Embodiment 1 is that: the wheel plate portion 12 has three ventilation areas 121 arranged at unequal intervals along its own circumference. The number of ventilation holes 1211 in the three ventilation areas 121 is the same, the shape of the ventilation holes 1211 in the three ventilation areas 121 is the same, the ventilation holes 1211 in each ventilation area 121 are arranged at equal intervals along the circumference of the wheel plate portion 12, the interval between adjacent ventilation holes 1211 in the three ventilation areas 121 is equal, some ventilation holes 1211 are staggered with the first fan blade 2, and some ventilation holes 1211 are arranged opposite to the first fan blade 2.

[0098] Example 7, as Figure 8 As shown, the difference from Embodiment 4 is that all ventilation holes 1211 are staggered with the first fan blade 2.

[0099] Example 8, as Figure 9 As shown, the difference from Embodiment 1 is that: the wheel plate portion 12 has three ventilation areas 121 that are equally spaced along its circumference. The ventilation holes 1211 in the three ventilation areas 121 have different shapes. The ventilation holes 1211 in each ventilation area 121 are equally spaced along the circumference of the wheel plate portion 12. The interval between adjacent ventilation holes 1211 in the three ventilation areas 121 is equal. All ventilation holes 1211 are staggered with the first fan blade 2.

[0100] The ventilation holes 1211 in each ventilation area 121 protrude along the virtual line between the sidewalls of the hub portion 11 and the sidewalls of the hub portion 11.

[0101] Example 9, as Figure 10 As shown, the difference from Embodiment 8 is that the virtual connection between the ventilation holes 1211 in each ventilation area 121 and the side wall away from the hub portion 11 is an arc with one end close to the hub portion 11 and the other end away from the hub portion 11.

[0102] The embodiment of the present application also provides a fan, which comprises the above-mentioned fan wheel, volute and motor, and the specific structure of the fan wheel is referred to the above-mentioned embodiment. Since the fan adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The fan wheel and the motor are both arranged in the volute, the motor is used to drive the fan wheel to rotate, and the volute is provided with an air outlet in the radial direction of the fan wheel.

[0103] In some embodiments, the above-mentioned fan is mainly applied to a fresh air module of an air conditioner, so the volute comprises an upper volute and a lower volute, and the first side 13 faces the upper volute. When the fan is mainly applied to an air conditioner, noise reduction structures such as sound-absorbing sheets and sound-absorbing cotton are usually arranged in the volute, and a filter screen frame can also be arranged to support a filter screen, which is used to filter impurities in air.

[0104] The embodiment of the present application also provides an air conditioner indoor unit, which comprises the above-mentioned fan wheel or the above-mentioned fan. The specific structure of the fan wheel is referred to the above-mentioned embodiment, and the specific structure of the fan is referred to the above-mentioned embodiment. Since the air conditioner indoor unit adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0105] In the above-mentioned embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. In the description of the present application, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include one or more features.

[0106] The fan wheel, fan and air conditioner indoor unit provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above-mentioned embodiment is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range can be changed, and the above-mentioned content of the specification should not be understood as limiting the present application.

Claims

1. A wind wheel, characterized in that The utility model relates to a fan blade support structure, comprising: a support part (1) for connecting with the motor shaft of a fan, the support part (1) has first side (13) and second side (14) opposite along the self axial direction, the support part (1) is provided with the ventilation hole (1211) through first side (13) and second side (14); a plurality of first wind blades (2) are arranged on the first side (13) and are spaced along the circumferential direction of the support part (1); And, a plurality of second wind blades (3) are arranged on the second side (14) and are spaced along the circumferential direction of the support part (1).

2. The wind wheel of claim 1, wherein, A plurality of first wind blades (2) and a plurality of second wind blades (3) are equally spaced along the circumferential direction of the support part (1); Along the axial direction of the support part (1), the projection of a plurality of second wind blades (3) on the second side (14) is located between a plurality of first wind blades (2).

3. The wind wheel of claim 2, wherein, Along the axial direction of the support part (1), the length of any first wind blade (2) is greater than the length of any second wind blade (3), and a plurality of first wind blades (2) are directed towards the air inlet side of the fan wheel.

4. The wind wheel of claim 3, wherein, Along the circumferential direction of the support part (1), the thickness of any first wind blade (2) is equal to the thickness of any second wind blade (3).

5. The wind wheel of claim 1, wherein, The ventilation hole (1211) is provided with a plurality of ventilation holes (1211) between a plurality of first wind blades (2) and the rotating shaft of the support part (1), and between a plurality of second wind blades (3) and the rotating shaft of the support part (1).

6. The wind wheel of claim 1, wherein, Along the circumferential direction of the support part (1), there are a plurality of spaced ventilation areas (121), each ventilation area (121) is provided with a plurality of ventilation holes (1211); Along the circumferential direction of the support part (1), the distance between adjacent ventilation areas (121) is equal or unequal.

7. The wind wheel of claim 6, wherein, A plurality of ventilation holes (1211) of each ventilation area (121) are equally spaced along the circumferential direction of the support part (1); And / or, along the radial direction of the support part (1), a plurality of ventilation holes (1211) are staggered with a plurality of first wind blades (2); Or, along the radial direction of the support part (1), a plurality of ventilation holes (1211) are opposite to a plurality of first wind blades (2); Or, along the radial direction of the support part (1), part of the ventilation holes (1211) are staggered with a plurality of first wind blades (2), and part of the ventilation holes (1211) are opposite to a plurality of first wind blades (2).

8. The wind wheel of claim 6, wherein, Along the radial direction of the support part (1) outward, the ventilation hole (1211) gradually increases; And / or, a plurality of ventilation holes (1211) are the same or different in size; And / or, along the circumferential direction of the support part (1), the size of a plurality of ventilation holes (1211) of each ventilation area (121) gradually increases; Or, the size of a plurality of ventilation holes (1211) of each ventilation area (121) gradually increases in the direction of the middle part of the two ends of the ventilation area (121).

9. A fan, characterized by The fan wheel, the volute and the motor as claimed in any one of claims 1-8, the fan wheel and the motor are arranged in the volute, the motor is used to drive the fan wheel to rotate, and the volute is provided with an air outlet in the radial direction of the fan wheel.

10. An air conditioner indoor unit characterized by comprising: The fan wheel as claimed in any one of claims 1-8, or the fan as claimed in claim 9.

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