Improved tower fan wind wheel structure

Abstract

The utility model discloses an improved tower fan wind wheel structure which comprises a first side cover and a second side cover which are coaxially arranged, a plurality of separation rings are arranged between the first side cover and the second side cover at intervals, a plurality of impeller sets which are coaxially arranged are formed through separation, and each impeller set is provided with a plurality of blade groups. The blade groups are distributed at intervals in the circumferential direction, and an interval d2 is formed between every two adjacent blade groups; each blade group comprises more than three blade units, an interval d1 is formed between every two adjacent blade units, and in the same blade group, the intervals d1 between the blade units are arranged in an equal mode or have a gradually-increasing or gradually-decreasing changing trend and meet the condition that the interval d1 is smaller than the interval d2. Compared with the prior art, the influence of errors caused by a forming process is reduced, so that the wind speed and the air output can be increased under the conditions that the wind wheel structure runs more stably and the rated output power is the same, and the running noise of the tower fan wind wheel is reduced.

Description

An improved tower fan rotor structure Technical Field

[0001] This utility model relates to the field of tower fan technology, and in particular to an improved tower fan impeller structure. Background Technology

[0002] Tower fans, also known as convection fans, are fans designed based on the principles of aerodynamics. They enable a three-dimensional exchange system between indoor and outdoor air, similar to a blower used in a stove, and can deliver air even without fan blades.

[0003] For example, in the Chinese invention patent with application number "CN201811438498.4" and patent name "Windmill Device and Household Appliance", one end of the cross-flow windmill is equipped with a bushing, and the other end of the cross-flow windmill is provided with a rotating shaft; the motor has a motor shaft, which is inserted into the bushing to drive the cross-flow windmill to rotate around its axis; multiple partition rings are provided between the two end side covers of the cross-flow windmill, forming an impeller area, and multiple blades are distributed along the circumferential direction in each impeller area.

[0004] The existing wind turbine structure still has shortcomings: due to the influence of the molding process, the wind turbine structure is prone to poor dynamic balance and high noise; after long-term use, the shaft wears out quickly and has a short service life; and the air output is insufficient. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an improved tower fan impeller structure that increases airflow and reduces impeller noise while maintaining the same rated output power.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an improved tower fan impeller structure, comprising a first side cover and a second side cover coaxially arranged, with multiple partition rings spaced between the first side cover and the second side cover, forming multiple coaxially arranged impeller groups, each impeller group having multiple blade groups, each blade group being spaced apart along the circumferential direction, with a gap d2 between adjacent blade groups; each blade group includes three or more blade units, with a gap d1 between adjacent blade units, and in the same blade group, the gap d1 between each blade unit is equal, or has a gradually increasing or decreasing trend, and meets the condition: gap d1 < gap d2.

[0007] In a further technical solution, each impeller assembly has 20 to 45 blade units, and the distribution specifications of the blade units in each impeller assembly are the same.

[0008] In a further technical solution, along the direction from the first side cover to the second side cover, each impeller assembly is rotated and staggered at equal angular intervals in a clockwise or counterclockwise direction, with each adjacent impeller assembly forming an equal staggered angle θ, which is 2.5 degrees to 7.5 degrees.

[0009] In a further technical solution, the outer diameter of the impeller assembly is 45mm-150mm, the number of impeller assemblies is 3-14, and the length of each impeller assembly is 25mm-80mm.

[0010] In a further technical solution, each blade unit has the same specifications, the cross-sectional shape of the blade unit is arc-shaped, the cross-sectional thickness b of the blade unit is 1.2mm-2.8mm, the cross-sectional length L of the blade unit is 8.2mm-14.2mm, and the torsion angle a of the blade unit is 8 degrees-15 degrees.

[0011] In a further technical solution, a shaft is provided at the axial position of the first side cover; a locking sleeve is provided at the axial position of the second side cover. The locking sleeve is located on the inner or outer side of the second side cover. A locking screw is threaded onto the locking sleeve, and the inner end of the locking screw extends movably into the inner cavity of the locking sleeve to lock the motor output shaft.

[0012] In a further technical solution, when the locking sleeve is fitted on the inner side of the second side cover, a corresponding blade unit in the first impeller assembly near the second side cover is missing and hollowed out to form an assembly clearance space.

[0013] In a further technical solution, a connecting ring, a metal ring, a soft leather ring, and a locking sleeve are sequentially connected from the outside to the inside at the center of the second side cover. The connecting ring is formed on the second side cover; the outer ring of the metal ring is connected to the connecting ring; the outer edge of the soft leather ring is bonded to the metallized inner ring; and the locking sleeve is bonded to the inner ring of the soft leather ring.

[0014] In a further technical solution, at least one impeller assembly is provided with a dynamic balancing block, which is fixed to the blade unit.

[0015] In a further technical solution, the dynamic balancing block includes a plastic sheet weighing 1-10 grams, which is fused to the corresponding blade unit.

[0016] The advantages of this invention compared to existing technologies after adopting the above structure are as follows: This invention provides an improved tower fan impeller structure. By setting multiple blade groups in each impeller assembly, under the same rated output power, it can increase wind speed and air volume, and reduce the operating noise of the tower fan impeller. When the rotation speed is 1400 rpm, its operating noise can be controlled to below 30.5 decibels. Compared with existing tower fan impellers, the wind speed is increased by 28.8%, the air volume is increased by 28.3%, and the noise is reduced by 36.6%. Furthermore, by adjusting the blades in each blade group... The varying interval d1 between units makes the airflow from the wind turbine smoother, further reducing wind resistance and noise. A flexible connection structure, including a soft ring similar to an "elastic coupling," is installed on the second side cover to overcome uneven loads caused by axial displacement, angular deviation, and angular velocity variations of the motor output shaft. This provides shock absorption and noise reduction, extending the service life of the locking sleeve and the wind turbine structure. Dynamic balance blocks are installed on the blade units to reduce vibration and noise generated during high-speed rotation of the wind turbine structure, improving its operational stability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 is a structural schematic diagram of this utility model.

[0019] Figure 2 is a structural schematic diagram of this utility model from another perspective.

[0020] Figure 3 is a schematic diagram of the structure of the second side cover in this utility model.

[0021] Figure 4 is a schematic diagram of the impeller assembly in Example 1.

[0022] Figure 5 is a schematic diagram of the impeller assembly in Example 2.

[0023] Figure 6 is a schematic diagram of the structure of the second side cover in Embodiment 2. Detailed Implementation

[0024] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0025] To address the shortcomings of existing tower fan impellers, such as low airflow and high noise, the applicant has redesigned a tower fan impeller structure that can effectively improve the user experience of tower fan products.

[0026] Example 1

[0027] As shown in Figures 1 to 4, an improved tower fan impeller structure includes a first side cover 1 and a second side cover 2 arranged coaxially. Multiple partition rings 4 are spaced apart between the first side cover 1 and the second side cover 2, forming multiple coaxially arranged impeller groups 3. The impeller group 3 is characterized by having multiple blade groups 31, which are spaced apart along the circumferential direction, with a gap d2 between adjacent blade groups 31. Each blade group 31 includes three or more blade units 301, with a gap d1 between adjacent blade units 301. Within the same blade group 31, the gaps d1 between each blade unit 301 are equal and meet the condition: gap d1 < gap d2.

[0028] By setting multiple blade groups 31 in the impeller assembly 3, the influence of errors caused by the molding process can be reduced, thereby making the operation of the wind turbine structure more stable. Under the same rated output power, the wind speed and air volume can be increased, and the operating noise of the tower fan wind turbine can be reduced.

[0029] After conducting multiple comparative tests between the tower fan product equipped with the tower fan impeller structure of this embodiment and competing products, the following test data table was obtained:

[0030]

[0031] Table 1

[0032] As shown in Table 1, when the rotation speed is 1400 rpm, its operating noise can be controlled to below 30.5 decibels. Compared with the existing tower fan impeller, the wind speed is increased by 28.8%, the air volume is increased by 28.3%, and the noise is reduced by 36.6%.

[0033] Specifically, each impeller assembly 3 is provided with 32 blade units 301, and the distribution specifications of the blade units 301 in each impeller assembly 3 are the same.

[0034] Specifically, along the direction from the first side cover 1 to the second side cover 2, each impeller assembly 3 is rotated and staggered at equal angles in a clockwise direction, with each adjacent impeller assembly 3 forming an equal staggered angle θ of 5 degrees.

[0035] Specifically, the outer diameter of impeller assembly 3 is 75mm, the number of impeller assemblies 3 is 6, and the length of each impeller assembly 3 is 78mm.

[0036] Specifically, each blade unit 301 has the same specifications, the cross-sectional shape of the blade unit 301 is arc-shaped, the cross-sectional thickness b of the blade unit 301 is 1.6mm, the cross-sectional length L of the blade unit 301 is 13mm, and the torsion angle α of the blade unit 301 is 12 degrees.

[0037] Specifically, a shaft 11 is provided at the axial position of the first side cover 1; a locking sleeve 23 is provided at the axial position of the second side cover 2. The locking sleeve 23 is located on the outer side of the second side cover 2. A locking screw 24 is threadedly installed on the locking sleeve 23. The inner end of the locking screw 24 extends movably into the inner cavity of the locking sleeve 23 to lock the motor output shaft.

[0038] Specifically, a connecting ring 20, a metal ring 21, a soft leather ring 22, and a locking sleeve 23 are sequentially connected from the outside to the inside at the center of the second side cover 2. The connecting ring 20 is formed on the second side cover 2; the outer ring of the metal ring 21 is connected to the connecting ring 20; the outer edge of the soft leather ring 22 is bonded to the metallized inner ring; and the locking sleeve 23 is bonded to the inner ring of the soft leather ring 22.

[0039] By setting a flexible connection structure, including a soft ring 22, similar to an "elastic coupling" on the second side cover 2, the uneven load caused by axial displacement, angular deviation and angular velocity change of the motor output shaft can be overcome, which has the functions of shock absorption and noise reduction, and extends the service life of the locking sleeve 23 and the impeller structure.

[0040] Specifically, at least one impeller assembly 3 is provided with a dynamic balancing block 5, which is fixedly connected to the blade unit 301. The dynamic balancing block 5 includes a plastic sheet weighing 5 grams, which is fused to the corresponding blade unit 301. Providing the dynamic balancing block 5 to the blade unit 301 can reduce the vibration and noise generated by the wind turbine structure when rotating at high speed, and improve the operational stability of the wind turbine structure.

[0041] Example 2

[0042] As shown in Figures 5 and 6, the wind turbine structure shown in this embodiment is basically the same as the wind turbine structure in the above embodiments. The difference is that the interval d1 between each blade unit 301 in each blade group 31 has a trend of gradually increasing in the counterclockwise direction.

[0043] This variable blade grouping 31 makes the airflow from the wind turbine gentler, further reducing wind resistance and wind noise.

[0044] After conducting multiple comparative tests between the tower fan product equipped with the tower fan impeller structure of this embodiment and competing products, the following test data table was obtained:

[0045]

[0046] Table 2

[0047] As shown in Table 2, when the rotation speed is 1400 rpm, its operating noise can be controlled to below 30.2 decibels. Compared with the existing tower fan impeller, the wind speed is increased by 26.2%, the air volume is increased by 26.3%, and the noise is reduced by 37.0%.

[0048] This blade grouping 31 with varying interval d1 can significantly reduce operating noise and provide users with a quieter experience; however, wind speed and air volume will be relatively reduced.

[0049] In addition, in this embodiment, the locking sleeve 23 is provided on the inner side of the second side cover 2, and the corresponding blade unit 301 in the first impeller group 3 near the second side cover 2 is missing and hollowed out to form an assembly clearance space 30.

[0050] This built-in locking sleeve 23 can further reduce polarization, improve the stability of the wind turbine structure, and extend its service life. In addition, the rotational polarization caused by the lack of blade unit 301 can be solved by setting the dynamic balance block 5, which will not be described in detail here.

[0051] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An improved tower fan impeller structure, comprising a first side cover (1) and a second side cover (2) coaxially arranged, wherein a plurality of partition rings (4) are spaced apart between the first side cover (1) and the second side cover (2), and thereby form a plurality of coaxially arranged impeller assemblies (3), characterized in that: Each impeller assembly (3) is provided with multiple blade groups (31), and each blade group (31) is arranged at intervals along the circumferential direction. An interval d2 is formed between two adjacent blade groups (31). Each blade group (31) includes three or more blade units (301), and an interval d1 is formed between two adjacent blade units (301). In the same blade group (31), the interval d1 between each blade unit (301) is set to be equal, or has a gradually increasing or gradually decreasing trend, and meets the condition: interval d1 < interval d2.

2. The improved tower fan impeller structure according to claim 1, characterized in that: Each impeller assembly (3) is provided with 20 to 45 blade units (301), and the blade units (301) in each impeller assembly (3) have the same distribution specifications.

3. An improved tower fan impeller structure according to claim 2, characterized in that: Along the direction from the first side cover (1) toward the second side cover (2), each of the impeller groups (3) is rotated and staggered at equal angular intervals in the clockwise or counterclockwise direction, and an equal staggered angle θ is formed between two adjacent impeller groups (3), with the staggered angle θ being 1 degree to 10 degrees.

4. An improved tower fan impeller structure according to claim 3, characterized in that: The outer diameter of the impeller assembly (3) is 45mm-150mm, the number of impeller assemblies (3) is 3-14, and the length of each impeller assembly (3) is 25mm-80mm.

5. An improved tower fan impeller structure according to claim 4, characterized in that: Each blade unit (301) has the same specifications. The cross-sectional shape of the blade unit (301) is arc-shaped. The cross-sectional thickness b of the blade unit (301) is 1.2mm-2.8mm, the cross-sectional length L of the blade unit (301) is 8.2mm-14.2mm, and the torsion angle α of the blade unit (301) is 8 degrees-15 degrees.

6. An improved tower fan impeller structure according to claim 1, characterized in that: A shaft (11) is provided at the axial position of the first side cover (1); a locking sleeve (23) is provided at the axial position of the second side cover (2). The locking sleeve (23) is located on the inner or outer side of the second side cover (2). A locking screw (24) is threadedly installed on the locking sleeve (23). The inner end of the locking screw (24) extends movably into the inner cavity of the locking sleeve (23) and is used to lock the motor output shaft.

7. An improved tower fan impeller structure according to claim 6, characterized in that: When the locking sleeve (23) is located on the inner side of the second side cover (2), the corresponding blade unit (301) in the first impeller assembly (3) near the second side cover (2) is missing and hollowed out to form an assembly clearance space (30).

8. An improved tower fan impeller structure according to claim 7, characterized in that: The second side cover (2) is provided with a connecting ring (20), a metal ring (21), a soft leather ring (22) and a locking sleeve (23) connected sequentially from the outside to the inside at the center position. The connecting ring (20) is formed on the second side cover (2); the outer ring of the metal ring (21) is connected to the connecting ring (20); the outer edge of the soft leather ring (22) is bonded to the metallized inner ring; and the locking sleeve (23) is bonded to the inner ring of the soft leather ring (22).

9. An improved tower fan impeller structure according to claim 1, characterized in that: At least one of the impeller units (3) is provided with a dynamic balancing block (5), which is fixed to the blade unit (301).

10. An improved tower fan impeller structure according to claim 9, characterized in that: The dynamic balancing block (5) includes a plastic sheet weighing 1-10 grams, which is fused to the corresponding blade unit (301).

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