End cover assembly, cross-flow wind wheel with end cover assembly and cross-flow fan with end cover assembly

Abstract

The utility model particularly relates to an end cover assembly which is arranged at the end of a cross-flow wind wheel and connected with a motor of the cross-flow wind wheel, the end cover assembly comprises an end cover and a plurality of heat dissipation blades, the end cover is arranged at the end of the cross-flow wind wheel, an input end connected with the motor is arranged in the middle of the end cover, the heat dissipation blades are arranged on the end cover, and the heat dissipation blades are arranged on the end cover. The heat dissipation blades are arranged on the periphery of the input end in a surrounding mode in the circumferential direction at intervals, and the extension line of each heat dissipation blade coincides with the center of the end cover. According to the end cover assembly provided by the invention, the plurality of heat dissipation blades are arranged on the end cover, and the extension lines of the heat dissipation blades coincide with the center of the end cover, so that the axial air supply capacity and the axial air supply amount of the heat dissipation blades are improved, the heat dissipation effect of the heat dissipation blades on the motor is improved, and the temperature rise performance and the load capacity of the motor are improved; when the motor is under the condition of high load or coil material cost reduction, the phenomenon of abnormal working due to the fact that the temperature of the motor exceeds the standard can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to an end cover assembly and a crossflow impeller and a crossflow fan having the same. Background Art

[0002] The crossflow impeller is mainly composed of a shaft cover, a wind wheel and a motor end cover, wherein the motor end cover is connected to the motor shaft through a shaft sleeve, so the motor can drive the motor end cover to drive the wind wheel to rotate. Since the cost of the motor accounts for a high proportion of the overall cost of the crossflow impeller, the cost of the motor is related to the load capacity of the motor. One of the important indicators for measuring the load capacity of the motor is the motor temperature rise parameter, and the motor temperature rise value is related to the volume of the motor and the coil material. If the material cost of the motor is reduced (for example, copper wire is replaced by aluminum wire), the motor temperature rise value will exceed the use standard, resulting in the motor being unable to meet the needs of the crossflow impeller. Utility Model Content

[0003] In view of this, the present application provides an end cover assembly and a crossflow impeller and a crossflow blower having the same, so as to solve the technical problem in the prior art that the end cover assembly has a poor heat dissipation effect on the motor.

[0004] In a first aspect, the present application provides an end cover assembly, which is arranged at the end of a crossflow wind wheel and connected to the motor of the crossflow wind wheel, and the end cover assembly includes: an end cover, which is arranged at the end of the crossflow wind wheel, and an input terminal connected to the motor is arranged in the middle of the end cover; a plurality of heat dissipation blades, which are arranged on the end cover and are circumferentially spaced around the periphery of the input terminal, and the extension line of each heat dissipation blade coincides with the center of the end cover.

[0005] Beneficial effect: The end cover assembly provided in the present application proposes to set a plurality of heat dissipation blades on the end cover, and set the heat dissipation blades so that the extension lines coincide with the center of the end cover, so as to improve the axial air supply capacity and axial air supply volume of the heat dissipation blades, thereby improving the heat dissipation effect of the heat dissipation blades on the motor, improving the temperature rise performance and load capacity of the motor, and enabling the motor to be in normal working state when the motor is under high load or the coil material cost is reduced, thereby reducing the phenomenon of abnormal operation due to excessive motor temperature.

[0006] In an optional implementation, the heat dissipation blades are configured as flat blades, and a plurality of flat blades are radially and evenly distributed circumferentially, and a thickness b of each flat blade is in the range of 1 mm ≤ b ≤ 4 mm.

[0007] Beneficial effect: The embodiment of the present application proposes to limit the distribution form and thickness range of the heat dissipation blades. The flat blades proposed in the embodiment of the present application can effectively improve the axial convergence ability of the supply air flow by adopting a divergent distribution method, so that the supply air flow can be concentrated and transported to the main heat generation position of the motor, thereby improving the heat dissipation blades' ability to reduce the temperature of the motor.

[0008] In an optional implementation, the heat dissipation blades are configured as flat blades, and a plurality of flat blades are radially and evenly distributed circumferentially, and a spacing angle θ between two adjacent flat blades is in the range of 10°≤θ≤30°.

[0009] Beneficial effect: The interval angle between two adjacent flat blades is θ, and the number of flat blades Z is Z=360° / θ. The embodiment of the present application proposes to limit the value range of the interval angle θ of the flat blades, that is, the number of flat blades Z. A large number of flat blades Z will increase the flow channel friction between the two flat blades and aggravate kinetic energy dissipation. A small number of plate blades Z will aggravate the vortex accumulation and shedding of two adjacent flat blades, affecting the aerodynamic efficiency of the heat dissipation blades.

[0010] In an optional implementation, the interval angle θ between two adjacent flat blades is 15°.

[0011] Beneficial effect: Too many or too few flat blades will affect the temperature reduction performance of the motor. Therefore, it is necessary to optimize the interval angle range between two adjacent flat blades. The interval angle θ range of two adjacent flat blades defined in the embodiment of the present application can achieve a certain heat dissipation effect. In addition, the embodiment of the present application preferably sets the interval angle θ of two adjacent flat blades to 15°.

[0012] In an optional embodiment, the heat dissipation blades are configured as flat blades, and multiple flat blades are radially and evenly spaced to form a circular ring. The outer diameter of the circular ring is D2, the outer diameter of the crossflow wind wheel is D1, and the ratio range of D2 to D1 is: 0.6≤ΦD2 / ΦD1≤1.

[0013] Beneficial effect: The embodiment of the present application proposes that the outer diameter ΦD2 of the flat blade is smaller than the maximum outer diameter ΦD1 of the crossflow wind wheel (the outer diameter of the wind wheel), and the ratio of the outer diameter ΦD2 of the flat blade to the maximum outer diameter ΦD1 of the crossflow wind wheel satisfies: 0.6≤ΦD2 / ΦD1≤1, thereby limiting the maximum outer diameter size of the flat blade. If the outer diameter of the flat blade is too large, the flat blade will be affected by the air duct at the volute and the volute tongue, and the spiral outward expansion trend of the air supply path of the flat blade will be enhanced, reducing the axial heat dissipation effect of the flat blade on the motor; if the outer diameter of the flat blade is too small, the blade width of the flat blade will be smaller, reducing its heat dissipation.

[0014] In an optional implementation, the ratio of D2 to D1 is: ΦD2 / ΦD1=0.85.

[0015] Beneficial effect: The range of the ratio of ΦD2 / ΦD1 defined in the embodiment of the present application can achieve a certain heat dissipation effect. In addition, the preferred ratio of ΦD2 / ΦD1 in the embodiment of the present application is 0.85.

[0016] In an optional implementation, the heat dissipation blades are configured as flat blades, and a plurality of flat blades are radially and evenly distributed circumferentially, and a height H of each flat blade is in the range of 4 mm ≤ H ≤ 15 mm.

[0017] Beneficial effect: The embodiment of the present application proposes a limitation on the axial height of the flat blade. Since the flat blade occupies part of the position of the crossflow wind wheel, if the axial height of the flat blade is too large, the air volume of the crossflow wind wheel will be attenuated, thereby reducing the performance of the crossflow wind wheel; if the height of the flat blade is too small, the heat dissipation effect of the flat blade will be weakened.

[0018] In an optional embodiment, the height H of each flat blade is 6 mm.

[0019] Beneficial effect: Taking into account the air volume of the crossflow wind wheel and the heat dissipation performance of the flat blade, the embodiment of the present application proposes a value range of the height H of the flat blade. When H exceeds the value range of H described in the embodiment of the present application, the air volume attenuation of the crossflow wind wheel will be aggravated and the heat dissipation performance gain of the flat blade will stagnate. The preferred embodiment of the embodiment of the present application is that the height H of the flat blade is 6 mm.

[0020] In an optional embodiment, an annular protrusion for mounting the input end is provided in the middle of the end cover, one end of the flat blade is connected to the annular protrusion, the heat dissipation blade is provided as a flat blade, and a gap is formed between the other end of the flat blade and the edge of the end cover.

[0021] Beneficial effect: The inside of the annular protrusion can provide installation space for the input end such as a metal sleeve, and the outside of the annular protrusion provides installation space for the heat dissipation blades, so that the heat dissipation airflow generated by the heat dissipation blades can be converged axially and transported to the motor to cool the motor.

[0022] In a second aspect, the present application provides a crossflow wind wheel, which includes: a wind wheel, which is configured as a cylindrical structure; an end cover assembly according to the first aspect of the present application, which is arranged at the end of the wind wheel; and a motor, which is configured to be connected to a drive shaft of the end cover assembly and is arranged at a position close to the flat blades of the end cover assembly.

[0023] Beneficial effects: The end cover is provided with structures such as heat dissipation blades, rubber discs, metal sleeves and fastening screws. Among them, the metal sleeve is fixed on the rubber disc by embedding, and the driving shaft of the motor is fixed in the metal sleeve by screws. Therefore, the rotation of the motor can drive the crossflow impeller to rotate and cool the motor to achieve the technical effect of cooling the motor.

[0024] In a third aspect, the present application provides a crossflow blower, comprising: a volute, an air duct formed inside the volute, and a volute tongue arranged at the opening of the volute; and a crossflow blower according to the second aspect of the present application, the crossflow blower is arranged in the air duct and corresponds to the volute tongue. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a partial structural schematic diagram of a crossflow impeller according to an embodiment of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the partial structure of the crossflow impeller shown;

[0028] Figure 3 for Figure 1 A partial structural front view of the crossflow impeller shown;

[0029] Figure 4 for Figure 1 A top view of the crossflow impeller shown;

[0030] Figure 5 A schematic diagram of an air supply path of a heat dissipation blade in the related art;

[0031] Figure 6 Schematic diagram of the air supply path of the heat dissipation blades according to an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100. Crossflow impeller;

[0034] 10. Wind wheel;

[0035] 20. End cover assembly; 21. End cover; 22. Input end; 23. Heat dissipation blade; 231. Flat blade; 24. Annular protrusion;

[0036] 30. Capping. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0038] In the description of the present application, it should be noted that the terms "inside", "upper", "outer", "lower", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of this application, 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 fixed connection, detachable connection, or integrated connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can also be the connection between two components, it can be wireless connection or wired connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In order to improve the temperature rise performance of the motor of the crossflow impeller, it is proposed to provide heat dissipation blades on the end cover of the crossflow impeller. The heat dissipation blades can rotate under the drive of the crossflow impeller to cool the motor, thereby improving the temperature rise performance of the motor.

[0041] However, the present applicant has found that since an impeller is provided on the crossflow fan wheel, the crossflow airflow caused by the rotation of the impeller will affect the heat dissipation airflow of the heat dissipation blades, thereby greatly reducing the cooling effect of the heat dissipation blades on the motor.

[0042] In order to solve the technical problem that the temperature rise of the motor of the existing crossflow wind wheel affects its load capacity, an embodiment of the present application proposes an end cover assembly of the crossflow wind wheel, which cools the motor by the heat dissipation blades on the end cover assembly, thereby improving the load capacity of the motor of the crossflow wind wheel.

[0043] Combine the following Figures 1 to 6 , describing an embodiment of the present application.

[0044] like Figures 1 to 4As shown, according to an embodiment of the present application, on the one hand, the present application provides an end cover assembly 20, which is arranged at the end of the crossflow wind wheel 100 and connected to the motor of the crossflow wind wheel 100. The end cover assembly 20 includes an end cover 21 and a plurality of heat dissipation blades 23. The end cover 21 is arranged at the end of the crossflow wind wheel 100, and an input terminal 22 connected to the motor is arranged in the middle of the end cover 21; a plurality of heat dissipation blades 23 are arranged on the end cover 21, and are circumferentially spaced around the periphery of the input terminal 22, and the extension line of each heat dissipation blade 23 coincides with the center of the end cover 21.

[0045] In this embodiment, the end cover assembly 20 provided in the embodiment of the present application proposes that a plurality of heat dissipation blades 23 are arranged on the end cover 21, and the heat dissipation blades 23 are arranged so that the extension lines coincide with the center of the end cover 21, so as to improve the axial air supply capacity and axial air supply volume of the heat dissipation blades 23, thereby improving the heat dissipation effect of the heat dissipation blades 23 on the motor, improving the temperature rise performance and load capacity of the motor, and enabling the motor to be in normal working state when the motor is under high load or the coil material is reduced in cost, thereby reducing the phenomenon of abnormal operation due to excessive motor temperature.

[0046] Specifically, Figure 5 The figure shows the air supply path of the heat dissipation blade 23 in the related art. Figure 6 The figure shows the air supply path of the heat dissipation blade 23 in this application. Figure 5 and Figure 6 The air supply path in the lower half is the cold air delivered to the motor by the respective heat dissipation blades 23. Figure 5 and Figure 6 By comparison, it can be seen that in the related art, the cold air flow delivered to the motor by the heat dissipation blades 23 is a hollow structure, and the cold air flow only surrounds a circle around the periphery, and cannot effectively cool down the main heating part in the middle of the motor.

[0047] The embodiment of the present application takes into account that the drive shaft of the motor is connected to and drives the input end 22 of the end cover assembly 20, the drive shaft of the motor and the input end 22 of the end cover assembly 20 are the main force-bearing structure and the heat-generating structure, and the drive shaft of the motor and the input end 22 of the end cover assembly 20 are both located at the center of the end cover 21. Therefore, the embodiment of the present application proposes to set the heat dissipation blade 23 as a flat blade 231 whose extension line coincides with the center of the end cover 21, so that the cold air flow generated by the heat dissipation blade 23 can converge in the middle, thereby having a larger axial air supply capacity, thereby improving the cooling effect of the heat dissipation blade 23 on the motor.

[0048] Specifically, the crossflow fan wheel 100 is mainly used inside the crossflow air duct. The air supply airflow generated by the heat dissipation blades 23 in the related technology is affected by the volute and the volute tongue in the crossflow air duct to produce a radial outward air supply trend, thereby weakening the axial air supply and heat dissipation capacity of the heat dissipation blades 23 to the motor. The heat dissipation blades 23 proposed in the embodiment of the present application can effectively improve the axial convergence capacity of the supply airflow by adopting a divergent distribution method, so that the supply airflow can be concentrated and transported to the main heating position of the motor, thereby improving the temperature reduction capacity of the heat dissipation blades 23 to the motor.

[0049] In addition, during the operation of the crossflow impeller 100, the motor drives the end cover 21 to rotate, and the end cover 21 drives the impeller 10 and the heat dissipation blades 23 to rotate. During the rotation, the heat dissipation blades 23 transport air to the motor to cool the motor. The faster the speed of the motor and the higher the power, the more heat is generated. At this time, the faster the speed of the heat dissipation blades 23, the more cooling air the heat dissipation blades 23 transport to the motor, and the better the heat dissipation effect of the motor, thereby achieving the effect that the cooling effect of the heat dissipation blades 23 can be adaptively adjusted according to the real-time power of the motor.

[0050] It should be noted that the embodiment of the present application does not limit the specific size and structure of the heat dissipation blades 23 because the main improvement of the present application is to improve the layout of the heat dissipation blades 23, so as to improve the axial air supply capacity of the heat dissipation blades 23. As for the specific size of the heat dissipation blades 23, it can be set according to the type of motor and the actual use environment. For example, the heat dissipation blades 23 can be set to a flat structure or an arc structure, and the thickness, height and density of the heat dissipation blades 23 can all be used as preferred embodiments of the present application.

[0051] Below through Figures 1 to 6 The preferred embodiments of the specific structure and size of the heat dissipation blade 23 are described in detail.

[0052] like Figures 1 to 4 As shown, in some embodiments, the heat dissipation blades 23 are configured as flat blades 231, and a plurality of flat blades 231 are radially and evenly distributed circumferentially, and the thickness b of each flat blade 231 ranges from 1 mm ≤ b ≤ 4 mm.

[0053] In the above embodiments, the embodiments of the present application propose to limit the distribution form and thickness range of the heat dissipation blades 23. The flat blades 231 proposed in the embodiments of the present application can effectively improve the axial convergence ability of the supply air flow by adopting a divergent distribution method, so that the supply air flow can be concentrated and transported to the main heating position of the motor, thereby improving the temperature reduction ability of the heat dissipation blades 23 on the motor.

[0054] In addition, if the thickness of the flat blade 231 is too thin, it will be easily damaged due to insufficient structural strength. If the thickness of the flat blade 231 is too thick, the flow channel width between two adjacent flat blades 231 will be reduced, thereby reducing the heat dissipation performance of the flat blade 231. Therefore, the embodiment of the present application limits the preferred value range of the thickness b of the flat blade 231, so that the flat blade 231 can take into account both structural strength and airflow conveying effect.

[0055] like Figures 1 to 4 As shown, in some embodiments, the heat dissipation blades 23 are configured as flat blades 231, and a plurality of flat blades 231 are radially and evenly distributed circumferentially, and the interval angle θ between two adjacent flat blades 231 is in the range of 10°≤θ≤30°.

[0056] In this embodiment, the interval angle between two adjacent flat blades 231 is θ, and the number Z of the flat blades 231 is Z=360° / θ. The embodiment of the present application proposes to limit the interval angle θ of the flat blades 231, that is, the value range of the number Z of the flat blades 231. A large number Z of the flat blades 231 will increase the flow channel friction between the two flat blades 231 and aggravate the kinetic energy dissipation. A small number Z of plate blades will aggravate the vortex accumulation and shedding of two adjacent flat blades 231, affecting the aerodynamic efficiency of the heat dissipation blade 23.

[0057] Therefore, too many or too few flat blades 231 will affect the temperature reduction performance of the motor, so it is necessary to optimize the interval angle range between two adjacent flat blades 231. As shown in Table 1 below, the interval angle θ range between two adjacent flat blades 231 defined in the embodiment of the present application can achieve a certain heat dissipation effect. In addition, the embodiment of the present application preferably sets the interval angle θ between two adjacent flat blades 231 to 15°.

[0058] Table 1 Effect of heat dissipation performance on blade spacing angle θ

[0059] Blade spacing angle θ(°) Motor temperature drop(K) 5 1 10 8 15 17 20 13 25 9 30 2

[0060] like Figures 1 to 4 As shown, in some embodiments, the heat dissipation blades 23 are configured as flat blades 231, and multiple flat blades 231 are radially and evenly spaced circumferentially arranged to form a ring, the outer diameter of the ring is D2, the outer diameter of the crossflow wind wheel 100 is D1, and the ratio range of D2 to D1 is: 0.6≤ΦD2 / ΦD1≤1.

[0061] In the above embodiment, the embodiment of the present application proposes that the outer diameter ΦD2 of the flat blade 231 is smaller than the maximum outer diameter ΦD1 of the crossflow wind wheel 100 (the maximum outer diameter of the wind wheel 10), and the ratio of the outer diameter ΦD2 of the flat blade 231 to the maximum outer diameter ΦD1 of the crossflow wind wheel 100 satisfies: 0.6≤ΦD2 / ΦD1≤1, thereby limiting the maximum outer diameter size of the flat blade 231. As shown in the data in Table 2 below, combined with the conclusions in Table 1 above, if the outer diameter of the flat blade 231 is too large, the influence of the wind duct at the volute and the volute tongue on the flat blade 231 will increase, so that the spiral outward expansion trend of the air supply path of the flat blade 231 will be enhanced, and the axial heat dissipation effect of the flat blade 231 on the motor will be reduced; if the outer diameter of the flat blade 231 is too small, the blade width of the flat blade 231 will be smaller, reducing its heat dissipation. As shown in Table 2 below, the ratio range of ΦD2 / ΦD1 defined in the embodiment of the present application can achieve a certain heat dissipation effect. In addition, in the embodiment of the present application, the ratio of ΦD2 / ΦD1 is preferably 0.85.

[0062] Table 2 The influence of blade diameter ratio on heat dissipation performance at the same speed

[0063] Blade diameter ratio (ΦD2 / ΦD1) Motor temperature drop (K) 1 11 0.9 13 0.85 17 0.7 12 0.65 8 0.6 3

[0064] like Figures 1 to 4 As shown, in some embodiments, the heat dissipation blades 23 are configured as flat blades 231, and a plurality of flat blades 231 are radially and evenly distributed circumferentially, and the height H of each flat blade 231 is in the range of 4 mm ≤ H ≤ 15 mm.

[0065] In this embodiment, the embodiment of the present application proposes to limit the axial height of the flat blade 231. Since the flat blade 231 occupies part of the position of the crossflow wind wheel 100, if the axial height of the flat blade 231 is too large, the air volume of the crossflow wind wheel 100 will be attenuated, reducing the performance of the crossflow wind wheel 100; if the height of the flat blade 231 is too small, the heat dissipation effect of the flat blade 231 will be weakened. As shown in Table 3 below, considering the air volume of the crossflow wind wheel 100 and the heat dissipation performance of the flat blade 231, the embodiment of the present application proposes a value range of the height H of the flat blade 231. When H exceeds the value range of H described in the embodiment of the present application, the air volume attenuation of the crossflow wind wheel 100 will be aggravated and the heat dissipation performance of the flat blade 231 will stagnate. The preferred embodiment of the embodiment of the present application is that the height H of the flat blade 231 is 6 mm.

[0066] Table 3 Air volume and heat dissipation performance affected by the axial height H of the heat dissipation blade 23

[0067] Height of cooling blade H(mm) <![CDATA[Cross-flow fan air volume (m 3 / h)]]> Motor temperature drop(K) 3 371 2 4 371 8 6 370 17 10 361 17.5 15 350 18 17 343 18

[0068] like Figures 1 to 4As shown, in some embodiments, an annular protrusion 24 for mounting the input end 22 is provided in the middle of the end cover 21, one end of the flat blade 231 is connected to the annular protrusion 24, the heat dissipation blade 23 is configured as a flat blade 231, and a gap is formed between the other end of the flat blade 231 and the edge of the end cover 21.

[0069] In this embodiment, the interior of the annular protrusion 24 can provide an installation space for the input end 22 such as a metal sleeve, and the exterior of the annular protrusion 24 provides an installation space for the heat dissipation blades 23, so that the heat dissipation airflow generated by the heat dissipation blades 23 can be converged axially and transported to the motor to cool the motor.

[0070] like Figures 1 to 6 As shown, in summary, the embodiment of the present application provides a heat dissipation blade 23 corresponding to the motor on the end cover assembly 20 of the crossflow wind wheel 100, and the heat dissipation blade 23 is driven by the crossflow wind wheel 100 to rotate to dissipate heat and cool the motor, and by optimizing the inner and outer diameter ratio, blade height ratio and blade distribution angle parameters of the heat dissipation blade 23, it is possible to improve and reduce the temperature rise parameters of the motor when the motor is under high load or the coil material cost is reduced, thereby alleviating the material cost pressure of the motor while ensuring the original air volume performance of the crossflow wind wheel 100.

[0071] Specifically, the heat dissipation blades 23 are distributed around the input end 22 of the end cover assembly 20 and are arranged in a divergent distribution manner. The axial air supply capacity of the heat dissipation blades 23 is enhanced by adjusting the ratio of the outer diameter ΦD2 of the heat dissipation blades 23 to the outer diameter ΦD1 of the crossflow wind wheel 100 (that is, the maximum outer diameter of the crossflow wind wheel 100); and the heat dissipation air volume of the heat dissipation blades 23 is enhanced by controlling parameters such as the distribution angle θ and the blade thickness b of the heat dissipation blades 23, thereby improving the cooling performance of the heat dissipation blades 23; in addition, considering that the structure of the heat dissipation blades 23 will occupy the height space of the wind wheel 10 originally close to the end cover assembly 20, affecting the air volume performance of the wind wheel 10, the embodiment of the present application proposes to design a parameter value range of the axial height H of the heat dissipation blades 23, and comprehensively considers the temperature drop performance of the heat dissipation blades 23 and the air volume performance of the wind wheel 10 to obtain the preferred range of the axial height H of the heat dissipation blades 23, so that the crossflow wind wheel 100 can have a better heat dissipation capacity under the premise of ensuring the original air volume performance of the wind wheel 10.

[0072] like Figures 1 to 4 As shown, in the second aspect, the present application provides a crossflow wind wheel 100, and the crossflow wind wheel 100 includes: a wind wheel 10, which is configured as a cylindrical structure; an end cover assembly 20 according to the first aspect of the present application, and the end cover assembly 20 is arranged at the end of the wind wheel 10; a motor, which is configured to be connected to the drive shaft of the end cover assembly 20 and is arranged at a position close to the flat blade 231 of the end cover assembly 20.

[0073] In this embodiment, the end cover 21 is provided with heat dissipation blades 23, a rubber disc, a metal sleeve and fastening screws, among which the metal sleeve is fixed on the rubber disc by embedding, and the driving shaft of the motor is fixed in the metal sleeve by screws. Therefore, the rotation of the motor can achieve the technical effect of driving the crossflow impeller 100 to rotate and cooling the motor.

[0074] Furthermore, the crossflow fan wheel 100 is mainly used inside the crossflow air duct. The air supply airflow generated by the heat dissipation blades 23 in the related technology is affected by the volute and the volute tongue in the crossflow air duct to produce a radial outward air supply trend, thereby weakening the axial air supply and heat dissipation capacity of the heat dissipation blades 23 to the motor. The flat blades 231 proposed in the embodiment of the present application can effectively improve the axial convergence capacity of the air supply airflow by adopting a divergent distribution method, so that the air supply airflow can be concentrated and transported to the main heating position of the motor, thereby improving the temperature reduction capacity of the heat dissipation blades 23 to the motor.

[0075] In a third aspect, the present application provides a crossflow blower, comprising: a volute, an air duct is formed inside the volute, and a volute tongue is arranged at the opening of the volute; according to the crossflow blower 100 of the second aspect of the present application, the crossflow blower 100 is arranged in the air duct and corresponds to the volute tongue.

[0076] In this embodiment, the crossflow blower provided in the embodiment of the present application has all the technical effects of the crossflow blower 100 of the second aspect of the present application and the end cover assembly 20 of the first aspect of the present application, which will not be described in detail here.

[0077] In addition, the embodiments of the present application have described the key improvements of the end cover assembly 20 and the crossflow wind wheel 100 of the present application, which does not mean that the end cover assembly 20 and the crossflow wind wheel 100 of the present application do not have other structures. For example, the crossflow wind wheel 100 provided in the embodiments of the present application is provided with a cover 30 opposite to the end cover assembly 20, and the cover 30 is provided with a support shaft. When the motor drives the end cover assembly 20 to rotate, the support shaft can cooperate with the end cover assembly 20 to rotate, so that the crossflow wind wheel 100 can rotate normally to supply air.

[0078] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An end cap assembly, characterized in that: The end cover assembly (20) is arranged at an end of the crossflow impeller (100) and is connected to a motor of the crossflow impeller (100). The end cover assembly (20) comprises: An end cover (21), the end cover (21) being arranged at an end of the crossflow impeller (100), and an input end (22) connected to the motor being arranged in the middle of the end cover (21); A plurality of heat dissipation blades (23) are arranged on the end cover (21) and are arranged at intervals along the circumferential direction around the input end (22), and an extension line of each heat dissipation blade (23) coincides with the center of the end cover (21).

2. The end cap assembly according to claim 1, characterized in that: The heat dissipation blades (23) are configured as flat blades (231), a plurality of the flat blades (231) are radially and evenly spaced circumferentially distributed, and the thickness b of each of the flat blades (231) is in the range of 1 mm ≤ b ≤ 4 mm.

3. The end cap assembly according to claim 1, characterized in that: The heat dissipation blades (23) are configured as flat blades (231), a plurality of the flat blades (231) are radially and evenly spaced circumferentially distributed, and the interval angle θ between two adjacent flat blades (231) is in the range of 10°≤θ≤30°.

4. The end cap assembly according to claim 3, characterized in that: The interval angle θ between two adjacent flat blades (231) is 15°.

5. The end cap assembly according to claim 1, characterized in that: The heat dissipation blades (23) are configured as flat blades (231), and a plurality of the flat blades (231) are radially and evenly spaced to form a circular ring, the outer diameter of the circular ring is D2, the outer diameter of the crossflow impeller (100) is D1, and the ratio of D2 to D1 is in the range of 0.6≤ΦD2 / ΦD1≤1.

6. The end cap assembly according to claim 5, characterized in that: The ratio of D2 to D1 is: ΦD2 / ΦD1=0.

85.

7. The end cap assembly according to claim 1, characterized in that: The heat dissipation blades (23) are configured as flat blades (231), a plurality of the flat blades (231) are radially and evenly spaced circumferentially distributed, and a height H of each of the flat blades (231) is in the range of 4 mm ≤ H ≤ 15 mm.

8. The end cap assembly according to claim 7, characterized in that: The height H of each of the flat blades (231) is 6 mm.

9. The end cap assembly according to any one of claims 1 to 8, characterized in that: An annular protrusion (24) for mounting the input end (22) is provided in the middle of the end cover (21); the heat dissipation blade (23) is provided as a flat blade (231); one end of the flat blade (231) is connected to the annular protrusion (24); and a gap is formed between the other end of the flat blade (231) and the edge of the end cover (21).

10. A crossflow impeller, characterized in that: The crossflow impeller (100) comprises: A wind wheel (10), wherein the wind wheel (10) is configured as a cylindrical structure; According to any one of claims 1 to 9, the end cover assembly (20) is arranged at the end of the wind wheel (10); A motor is arranged to be connected to an input end (22) of the end cover assembly (20) and is arranged at a position close to a heat dissipation blade (23) of the end cover assembly (20).

11. A cross flow fan, characterized in that: The crossflow fan comprises: A volute, wherein an air duct is formed inside the volute, and a volute tongue is provided at the opening of the volute; According to the crossflow wind wheel (100) of claim 10, the crossflow wind wheel (100) is arranged in the air duct and corresponds to the volute tongue.

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