Tower fan wind wheel

Abstract

The utility model discloses a tower fan wind wheel which comprises a shaft rod, a left end cover and a right end cover, the left end cover and the right end cover are coaxially connected to the two sides of the shaft rod in a sleeved mode respectively, the projection shapes of the left end cover and the right end cover are identical circles respectively, and the spacing distance between the left end cover and the right end cover ranges from 186 mm to 720 mm. At least two impeller sets are arranged between the left end cover and the right end cover, a separation ring is arranged between every two adjacent impeller sets, and every two adjacent impeller sets are separated through the separation rings. Wherein each impeller set is provided with 19-29 blades which are arranged at equal intervals in the circumferential direction, and the outer diameter d of each impeller set ranges from 50 mm to 115 mm; all the blades in the same impeller set are the same in specification, the cross section of each blade is in an arc shape, the thickness a of the cross section of each blade is 0.5-1.5 mm, the length b of the cross section of each blade is 8.2-14.2 mm, and the torsion angle c of each blade is 5-15 degrees. Compared with the prior art, the wind speed and the air output of the tower fan wind wheel are improved, meanwhile, the operation noise of the tower fan wind wheel is reduced, and the use experience of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tower fan devices, in particular to a tower fan impeller. Background Art

[0002] The air supply principle of a tower fan is that air is "thrown" out by a cross-flow fan to form an air current. After the impeller rotates, air pressure is generated to produce centrifugal wind force, and finally the wind force is transmitted through the internal air guide wall. Since the cross-flow impeller is generally cylindrical, a three-dimensional air current wall, or a so-called "air curtain", is obtained by using a tower fan. This air curtain is perpendicular to the ground and blows from side to side. In addition, the cross-flow impeller has many blades, so the air supply is uniform and gentle, very close to natural wind.

[0003] The existing tower fan impellers still have disadvantages such as high noise, low wind speed, and small air volume. When the rotation speed of the tower fan impeller reaches 1500 rpm, the noise generated by the impeller is above 40 decibels, and it cannot balance the large air volume and silent effect of the tower fan, resulting in a poor experience. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a tower fan impeller, which can improve the wind speed and air supply volume of the tower fan impeller. At the same time, the running noise of the tower fan impeller is reduced, and the use experience of the product is improved.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a tower fan impeller, including a shaft rod, a left end cover, and a right end cover. The left end cover and the right end cover are respectively coaxially sleeved on both sides of the shaft rod, and the projected shapes of the left end cover and the right end cover are the same circle.

[0006] At least two groups of impeller sets are arranged between the left end cover and the right end cover, and a separation ring is arranged between adjacent two impeller sets. Adjacent two impeller sets are separated by the separation ring.

[0007] The outer diameter d of the impeller set is 50 - 115 mm, and each impeller set is respectively provided with 19 - 29 blades arranged at equal intervals in the circumferential direction.

[0008] The specifications of the blades in the same impeller set are the same. The cross-sectional shape of the blade is arc-shaped. The cross-sectional thickness a of the blade is 0.5 - 1.5 mm, the cross-sectional length b of the blade is 8.2 - 14.2 mm, and the twist angle c of the blade is 5 - 15°.

[0009] Adjacent two of the impeller sets rotate and stagger with the shaft rod as the axis; along the axial direction of the shaft rod, adjacent two of the blades do not overlap each other.

[0010] The distance between the left end cover and the right end cover is 186 - 720 mm; 6 - 8 of the impeller sets are arranged between the left end cover and the right end cover.

[0011] The impeller group includes a first impeller group and a second impeller group. The first impeller group and the second impeller group are alternately arranged along the axial direction of the shaft rod. The first impeller group and the second impeller group have the same length. Along the axial direction of the shaft rod, the angle between the blades in the first impeller group and the second impeller group is staggered by 2.5 - 7.5°.

[0012] A locking sleeve is provided on the outer side of the left end cover, and a limiting sleeve is provided on the inner side. The locking sleeve and the limiting sleeve are respectively threadedly connected to the shaft rod and cooperate to clamp the left end cover.

[0013] A plurality of radially arranged limiting ribs are provided on the circumferential part of the limiting sleeve, and each limiting rib is respectively connected to the inner side surface of the left end cover.

[0014] The left end cover is also formed with an annular reinforcing rib.

[0015] A shaft sleeve is provided on the outer side surface of the right end cover. The shaft sleeve is coaxially connected to the shaft rod, and the inner side surface of the shaft sleeve contacts the outer side surface of the right end cover.

[0016] A fastening hole is provided in the shaft sleeve along its radial direction. The fastening hole penetrates through inside and outside. A locking screw is threadedly assembled in the fastening hole, and the inner end of the locking screw abuts against the shaft rod.

[0017] A plurality of heat dissipation wheel blades are also provided on the outer side surface of the left end cover or the right end cover at equal intervals along the circumferential direction, and form a heat dissipation wind wheel structure that rotates synchronously with the tower fan wind wheel structure for motor heat dissipation.

[0018] After adopting the above structure, the advantages of the present utility model compared with the prior art are as follows: The present utility model is composed of multiple groups of impeller groups with specific specifications, which can improve the wind speed and air volume of the tower fan wind wheel, and reduce the operating noise of the tower fan wind wheel. When the rotation speed is 1400 rpm, its operating noise can be controlled below 31 decibels. Compared with the existing tower fan wind wheel, the wind speed is increased by 28.2%, the air volume is increased by 27.7%, and the noise is reduced by 36.3%; It has a heat dissipation wind wheel structure with synchronous rotation, which helps to dissipate heat from the motor inside the tower fan, reduces the use of heat dissipation motors, reduces the manufacturing cost of tower fan products, and can further improve the performance and stability of the motor; The adjacent impeller groups are arranged in a staggered manner, which can reduce the wind resistance and vibration of the tower fan wind wheel, further reduce the operating noise of the tower fan wind wheel, and make the air output more gentle, further improving the use experience of the tower fan product. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model.

[0020] Figure 2 is a cross-sectional schematic diagram of the present utility model.

[0021] Figure 3 It is a schematic structural diagram of the left end cover in the present utility model.

[0022] Figure 4 It is a schematic structural diagram of the right end cover in the present utility model. Specific embodiments

[0023] As Figures 1 to 4 shown, a tower fan impeller includes a shaft rod 1, a left end cover 2 and a right end cover 3. The left end cover 2 and the right end cover 3 are respectively coaxially sleeved on both sides of the shaft rod 1. The projected shapes of the left end cover 2 and the right end cover 3 are the same circle. The spacing distance between the left end cover 2 and the right end cover 3 is 486 mm. At least two groups of impeller sets are arranged between the left end cover 2 and the right end cover 3. A separation ring 4 is provided between adjacent two impeller sets, and adjacent two groups of impeller sets are separated by the separation ring 4. Among them, each impeller set is respectively provided with 24 blades 5 arranged at equal intervals along the circumferential direction. The outer diameter d of the impeller set is 81 mm. The specifications of the respective blades 5 in the same impeller set are the same. The cross-sectional shape of the blade 5 is arc-shaped. The cross-sectional thickness a of the blade 5 is 1 mm, the cross-sectional length b of the blade 5 is 11.2 mm, and the twist angle c of the blade 5 is 10°. The number of impeller sets provided is 8.

[0024] It is composed of multiple groups of impeller sets with specific specifications, which can improve the wind speed and air delivery volume of the tower fan impeller and reduce the operating noise of the tower fan impeller. When the rotational speed is 1400 rpm, its operating noise can be controlled below 31 decibels.

[0025] After the tower fan products equipped with the tower fan impeller structure of this embodiment are compared and tested with competing products for many times, the following test data table is obtained, as shown in Table 1.

[0026]

[0027] Table 1 - Test data table

[0028] As can be seen from Table 1, compared with competing products, the tower fan equipped with the tower fan impeller structure provided by this embodiment has significant performance improvements in terms of wind speed performance, noise performance and air volume performance. Especially when the rotational speed is in the second gear and the rotational speed is 1400 rpm, the operating noise of the tower fan impeller structure of this embodiment is only 30.9 decibels. Compared with competing products, its mute performance is improved by 48.5% in total. The first and second gears of this tower fan are both in the sleep mode, which can provide a good blowing effect at night and create a quiet sleep environment at the same time. While for competing products, when in the first gear, its noise performance is still difficult to be controlled below 40 decibels. It can be seen that the tower fan impeller structure provided by the present utility model has obvious performance improvements.

[0029] The adjacent two impeller groups rotate and stagger with the shaft rod 1 as the axis; along the axial direction of the shaft rod 1, the adjacent two blades 5 do not overlap each other. The impeller group includes a first impeller group 61 and a second impeller group 62. The first impeller group 61 and the second impeller group 62 are alternately arranged along the axial direction of the shaft rod 1. The lengths of the first impeller group 61 and the second impeller group 62 are the same. Along the axial direction of the shaft rod 1, the angle between the blades 5 in the first impeller group 61 and the second impeller group 62 is 5°. The adjacent impeller groups are arranged in a staggered manner, which can reduce the wind resistance and vibration of the tower fan impeller, further reduce the operating noise of the tower fan impeller, and make the air output more gentle, further improving the use experience of the tower fan product.

[0030] On the outer side of the left end cover 2, there is a locking sleeve 11, and on the inner side, there is a limiting sleeve 12. The locking sleeve 11 and the limiting sleeve 12 are respectively thread-connected to the shaft rod 1 and cooperate to clamp the left end cover 2. The circumferential part of the limiting sleeve 12 is provided with a plurality of radially arranged limiting rib strips 121, and each limiting rib strip 121 is respectively connected to the inner side surface of the left end cover 2. The left end cover 2 is also formed with an annular reinforcing rib 13. On the outer side surface of the right end cover 3, there is a shaft sleeve 31. The shaft sleeve 31 is coaxially connected to the shaft rod 1, and the inner side surface of the shaft sleeve 31 contacts the outer side surface of the right end cover 3. The shaft sleeve 31 is provided with a fastening hole 310 arranged along its radial direction. The fastening hole 310 penetrates through inside and outside, and a locking screw is threadedly assembled in the fastening hole 310. The inner end of the locking screw abuts against the shaft rod 1.

[0031] On the outer side surface of the left end cover 2 or the right end cover 3, there are also a plurality of heat dissipation wheel blades arranged at equal intervals along the circumferential direction, and they form a heat dissipation wind wheel structure 32 that rotates synchronously with the structure of the tower fan impeller for motor heat dissipation. Having the heat dissipation wind wheel structure 32 with synchronous rotation helps the heat dissipation of the motor inside the tower fan, reduces the use of heat dissipation motors, reduces the manufacturing cost of the tower fan product, and can improve the performance and stability of the motor.

[0032] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A tower fan impeller, comprising a shaft rod (1), a left end cover (2) and a right end cover (3), wherein the left end cover (2) and the right end cover (3) are respectively coaxially sleeved on both sides of the shaft rod (1), and is characterized in that: The projected shapes of the left end cover (2) and the right end cover (3) are respectively the same circle. There are at least two groups of impeller groups arranged between the left end cover (2) and the right end cover (3), and a separating ring (4) is provided between adjacent two impeller groups, and adjacent two impeller groups are separated by the separating ring (4). Each impeller group is respectively provided with a plurality of blades (5) arranged at equal intervals in the circumferential direction. The specifications of the respective blades (5) in the same impeller group are the same. The cross-sectional shape of the blade (5) is arc-shaped. The cross-sectional thickness a of the blade (5) is 0.5 - 1.5 mm, the cross-sectional length b of the blade (5) is 8.2 - 14.2 mm, and the twist angle c of the blade (5) is 5° - 15°. Between adjacent two of the impeller groups, they are rotationally offset with the shaft rod (1) as the axis; along the axial direction of the shaft rod (1), adjacent two of the blades (5) do not overlap each other.

2. The axial fan impeller according to claim 1, characterized in that: The outer diameter d of the impeller group is 50 - 115 mm, and each impeller group is respectively provided with 19 - 29 of the blades (5) arranged at equal intervals in the circumferential direction.

3. A tower fan impeller according to claim 2, wherein: The distance between the left end cover (2) and the right end cover (3) is 186 - 720 mm; there are 6 - 8 of the impeller groups arranged between the left end cover (2) and the right end cover (3).

4. A tower fan impeller according to claim 1, characterized in that: The impeller group includes a first impeller group (61) and a second impeller group (62). The first impeller group (61) and the second impeller group (62) are alternately arranged along the axial direction of the shaft rod (1). The lengths of the first impeller group (61) and the second impeller group (62) are the same. Along the axial direction of the shaft rod (1), the angle between the blades (5) in the first impeller group (61) and the second impeller group (62) is 2.5° - 7.5°.

5. A tower fan impeller according to claim 1, characterized in that: A locking sleeve (11) is provided on the outer side of the left end cover (2), and a limiting sleeve (12) is provided on the inner side. The locking sleeve (11) and the limiting sleeve (12) are respectively threadedly connected to the shaft rod (1) and cooperate to clamp the left end cover (2).

6. The axial fan impeller according to claim 5, wherein: A plurality of radially arranged limiting rib strips (121) are provided on the circumferential part of the limiting sleeve (12), and each of the limiting rib strips (121) is respectively connected to the inner side surface of the left end cover (2).

7. A tower fan impeller according to claim 6, characterized in that: The left end cover (2) is also formed with an annular reinforcing rib (13).

8. A tower fan impeller according to claim 7, characterized in that: A shaft sleeve (31) is provided on the outer side surface of the right end cover (3). The shaft sleeve (31) is coaxially connected to the shaft rod (1), and the inner side surface of the shaft sleeve (31) contacts the outer side surface of the right end cover (3).

9. The tower fan impeller according to claim 8, characterized in that: A fastening hole (310) is provided on the shaft sleeve (31) and is arranged along its radial direction. The fastening hole (310) penetrates through inside and outside. A locking screw is threadedly assembled in the fastening hole (310), and the inner end of the locking screw abuts against the shaft rod (1).

10. A tower fan impeller according to claim 6, characterized in that: A plurality of heat dissipation wheel blades are also provided on the outer side surface of the left end cover (2) or the right end cover (3) and are arranged at equal intervals in the circumferential direction, and they form a heat dissipation wind wheel structure (32) that rotates synchronously with the tower fan wind wheel structure for motor heat dissipation.

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