Low-noise cross-flow wind wheel and cross-flow fan

Abstract

The low-noise type cross-flow wind wheel comprises a first end cover, a second end cover, a reinforcing piece, a rotating shaft and a plurality of blades, and an included angle alpha is formed between the extending direction of the blades and the rotating shaft. A first positioning block and a second positioning block are arranged at the two ends of the blade respectively, a third positioning block is arranged in the middle of the blade, the first positioning block, the second positioning block and the third positioning block are in a right prism shape with the edges parallel to the rotating shaft, and the first positioning block, the second positioning block and the third positioning block surround the blade. The first end cover is provided with a first positioning hole matched with the first positioning block, the second end cover is provided with a second positioning hole matched with the second positioning block, and the reinforcing piece is provided with a third positioning hole matched with the third positioning block. The flow path of airflow can be optimized through the twisted blades, airflow turbulence can be effectively avoided, and therefore wind noise is reduced, energy loss is small, the mute performance is good, operation stability is high, and alignment assembly operation is simple and rapid.

Description

Technical Field

[0001] The utility model relates to the field of wind turbine components, in particular to a low-noise cross-flow impeller and a cross-flow fan. Background Art

[0002] The cross-flow impeller, also known as the cross-flow impeller, is a key component of the cross-flow fan. The cross-flow impeller is multi-bladed and long cylindrical, with forward multi-wing blades. The cross-flow impeller is made by manufacturing each part through a mold and obtaining it through welding.

[0003] As a key component of air treatment equipment, the performance of the cross-flow impeller directly affects the operation effect of the equipment. The traditional cross-flow impeller mainly includes end covers at both ends and several blades evenly distributed in a circle. The relative ends of the blades are respectively connected to the two end covers, and the blades and the end covers are fixed by welding or screws. When rotating at high speed, it is easy to loosen, and the operation noise is large and the energy loss is obvious. Content of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a low-noise cross-flow impeller and a cross-flow fan, which can achieve low-noise and high-efficiency operation, with stable structure and small energy loss during operation.

[0005] A low-noise cross-flow impeller according to an embodiment of the first aspect of the utility model includes a first end cover, a second end cover, a reinforcing piece, a rotating shaft, and several blades. The central connection line of the first end cover, the second end cover, and the reinforcing piece is collinear with the rotating shaft. The rotating shaft is connected to the first end cover. An included angle α is formed between the extending direction of the blade and the rotating shaft, where 0 < α ≤ 30°. All the blades are evenly distributed in a circumferential array around the rotating shaft.

[0006] First positioning blocks and second positioning blocks are respectively provided at the relative ends of the blade, and a third positioning block is provided in the middle of the blade. The first positioning block, the second positioning block, and the third positioning block are all straight prism-shaped with edges parallel to the rotating shaft. The first positioning block, the second positioning block, and the third positioning block all surround the blade. The first end cover is provided with several first positioning holes respectively matching with the respective first positioning blocks, and each first positioning block is respectively connected to each first positioning hole. The second end cover is provided with several second positioning holes respectively matching with the respective second positioning blocks, and each second positioning block is respectively connected to each second positioning hole. The reinforcing piece is provided with several third positioning holes respectively matching with the respective third positioning blocks, and each third positioning block is respectively connected to each third positioning hole.

[0007] In this embodiment, the first end cover is provided with a first jack, the second end cover is provided with a second jack, and the reinforcing piece is provided with a third jack. The rotating shaft passes through the first jack, the second jack, and the third jack. One end of the rotating shaft is located on the side of the first end cover away from the second end cover, and a shaft sleeve is provided on the side of the second end cover away from the first end cover.

[0008] In this embodiment, the reinforcing sheet is provided with a plurality of ventilation relief holes.

[0009] In this embodiment, the first end cap is further provided with a first clamping groove connected to one side of the first jack, the second end cap is further provided with a second clamping groove connected to one side of the second jack, the reinforcing sheet is further provided with a third clamping groove connected to one side of the third jack, and a clamping strip is provided on one side of the rotating shaft. The clamping strip is clamped and connected in the first clamping groove, the second clamping groove and the third clamping groove.

[0010] In this embodiment, the cross-sectional shape of the blade is arc-shaped.

[0011] In this embodiment, the included angle α between the extending direction of the blade and the rotating shaft is in the range of [2°, 5°].

[0012] In this embodiment, a first limiting piece is provided on the side of the first positioning block close to the blade, and a first riveting piece is provided on the side of the first positioning block far from the blade. The first riveting piece is used for press-riveting and connecting to the side of the first end cap far from the second end cap, and the first limiting piece abuts against the side of the first end cap close to the second end cap; a second limiting piece is provided on the side of the second positioning block close to the blade, and a second riveting piece is provided on the side of the second positioning block far from the blade. The second riveting piece is used for press-riveting and connecting to the side of the second end cap far from the second end cap, and the second limiting piece abuts against the side of the second end cap close to the second end cap.

[0013] A cross-flow fan according to the second aspect embodiment of the present invention includes the low-noise cross-flow impeller of the first aspect embodiment described above.

[0014] The embodiments of the present invention at least have the following beneficial effects:

[0015] By setting an angle α between the extension direction of the blade and the rotating shaft, the impact between the gas and the blade during air supply can be effectively reduced. By twisting the blade, the flow path of the air flow can be optimized, effectively avoiding air flow disorder. Thus, the wind noise generated during the operation of the cross-flow impeller can be effectively reduced, with small energy loss and good sound insulation performance, which can effectively improve the user experience. Moreover, the twisted impeller can also effectively reduce the probability of the cross-flow impeller's own structure shaking. The cross-flow impeller has high operating stability, low maintenance cost, and long service life. In addition, through the first positioning block, the second positioning block, and the third positioning block with edges parallel to the rotating shaft, the first positioning block, the second positioning block, and the third positioning block can be respectively inserted and installed into the corresponding first positioning hole, second positioning hole, and third positioning hole along the extension direction of the rotating shaft. Not only is the alignment and assembly operation simple and fast, with high alignment and assembly efficiency, but also the production efficiency of the cross-flow impeller is high. Moreover, the processing difficulty of the first positioning hole, the second positioning hole, and the third positioning hole can be effectively reduced, effectively saving the manufacturing cost of the cross-flow fan. By using the first positioning block, the second positioning block, and the third positioning block with larger sizes to contact and position the first end cover, the second end cover, and the reinforcing piece instead of the blade, the force directly borne by the blade can be effectively reduced, thereby effectively improving the structural stability and durability of the blade. Brief Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0017] Figure 1 is a three-dimensional structural schematic diagram of the low-noise cross-flow impeller according to an embodiment of the present utility model;

[0018] Figure 2 is a front-view structural schematic diagram of the low-noise cross-flow impeller according to an embodiment of the present utility model;

[0019] Figure 3 is an exploded structural schematic diagram of the low-noise cross-flow impeller according to an embodiment of the present utility model;

[0020] Figure 4 is Figure 3 a partial enlarged structural schematic diagram of A in

[0021] Figure 5 is an exploded structural schematic diagram of the low-noise cross-flow impeller according to an embodiment of the present utility model from another perspective;

[0022] Figure 6 is Figure 5 a partial enlarged structural schematic diagram of B in

[0023] Reference Signs:

[0024] First end cover 100, first positioning hole 110, first jack 120, first clamping groove 130;

[0025] Second end cover 200, second positioning hole 210, second jack 220, bushing 230, second clamping groove 240;

[0026] Reinforcing piece 300, third positioning hole 310, third jack 320, ventilation relief hole 330, third clamping groove 340;

[0027] Rotating shaft 400, clamping strip 410;

[0028] Blade 500, first positioning block 510, first limiting piece 511, first riveting piece 512, second positioning block 520, second limiting piece 521, second riveting piece 522, third positioning block 530. Detailed implementation mode

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, left, right, front, back, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] In the description of the present invention, if the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0033] The cross-flow impeller, also known as the cross-flow impeller wheel, is a key component of the cross-flow fan. The cross-flow impeller is multi-bladed and long cylindrical, with forward multi-wing type blades. The cross-flow impeller is made by manufacturing each part through a mold and obtaining it through welding. As a key component of air treatment equipment, the performance of the cross-flow impeller directly affects the operation effect of the equipment. Traditional cross-flow impellers mainly include end covers at both ends and several blades evenly distributed in a circle. The relative two ends of the blades are respectively connected to two end covers, and the blades and the end covers are fixed by welding or screws. The traditional design of cross-flow impellers often has problems such as unstable blade positioning, large vibration, and high noise. When rotating at high speed, it is prone to looseness, and the running noise is large and the energy loss is obvious. The structural stability is insufficient. In addition, the unreasonable arrangement and angle design of the blades will also exacerbate the disorder of the air flow, further increasing the noise.

[0034] To solve the above problems, although there are already some improved designs in the market, such as adding shock pads and optimizing the blade shape, these measures are still insufficient in reducing wind noise and improving stability. Especially for application scenarios that require low noise and high efficiency, such as silent air conditioners and heat dissipation of precision instruments, the traditional design is difficult to meet the requirements.

[0035] The following refers to the attached Figure 1 to the attached Figure 6 to describe the low-noise cross-flow impeller and cross-flow fan of the embodiments of the present invention, which can achieve low-noise and high-efficiency operation, with stable structure and small energy loss during operation.

[0036] Referring to Figures 1 to 6 a low-noise cross-flow impeller according to an embodiment of the first aspect of the present invention includes a first end cover 100, a second end cover 200, a reinforcing piece 300, a rotating shaft 400, and several blades 500. The outer contours of the first end cover 100, the second end cover 200, and the reinforcing piece 300 are all circular. The central connection lines of the first end cover 100, the second end cover 200, and the reinforcing piece 300 are collinear with the rotating shaft 400. The first end cover 100, the second end cover 200, and the reinforcing piece 300 are all perpendicular to the rotating shaft 400. The rotating shaft 400 is fixedly connected to the first end cover 100. For the rotating shaft 400 and each blade 500 respectively, an included angle α is formed between the extending direction of the blade 500 and the rotating shaft 400, where 0 < α ≤ 30°. All the blades 500 are evenly distributed in a circumferential array around the rotating shaft 400. All the blades 500 are arranged between the first end cover 100 and the second end cover 200, and all the blades 500 are equidistantly distributed along the circumferential trajectory with the rotating shaft 400 as the axis, which can form a good air-catching and air-sending effect;

[0037] For each blade 500, a first positioning block 510 and a second positioning block 520 are respectively provided at opposite ends of the blade 500, and a third positioning block 530 is provided in the middle of the blade 500. The contours of the first positioning block 510, the second positioning block 520, and the third positioning block 530 are all straight prism-shaped with all edges parallel to the rotating shaft 400. Preferably, the first positioning block 510, the second positioning block 520, and the third positioning block 530 are all cuboids. The first positioning block 510, the second positioning block 520, and the third positioning block 530 are all surrounded outside the blade 500, that is, each edge of the first positioning block 510, the second positioning block 520, and the third positioning block 530 is located around the blade 500 to ensure that the first positioning block 510, the second positioning block 520, and the third positioning block 530 can form a good positioning effect. The first end cover 100 is provided with a number of first positioning holes 110 respectively matching the first positioning blocks 510. The number of the first positioning holes 110 is equal to the number of the first positioning blocks 510, and the distribution positions of the first positioning holes 110 correspond to the positions of the first positioning blocks 510. Each first positioning block 510 is respectively fixedly connected to each corresponding first positioning hole 110. Preferably, the first positioning block 510 can be fixedly connected to the first end cover 100 by welding or riveting. The second end cover 200 is provided with a number of second positioning holes 210 respectively matching the second positioning blocks 520. The number of the second positioning holes 210 is equal to the number of the second positioning blocks 520, and the distribution positions of the second positioning holes 210 correspond to the positions of the second positioning blocks 520. Each second positioning block 520 is respectively fixedly connected to each corresponding second positioning hole 210. Preferably, the second positioning block 520 can be fixedly connected to the second end cover 200 by welding or riveting. The reinforcing piece 300 is provided with a number of third positioning holes 310 respectively matching the third positioning blocks 530. The number of the third positioning holes 310 is equal to the number of the third positioning blocks 530, and the distribution positions of the third positioning holes 310 correspond to the positions of the third positioning blocks 530. Each third positioning block 530 is respectively fixedly connected to each corresponding third positioning hole 310. Preferably, the third positioning block 530 can be fixedly connected to the reinforcing piece 300 by welding.

[0038] By setting an angle α between the extending direction of the blade 500 and the rotating shaft 400, that is, the blade 500 is twisted relative to the rotating shaft 400, the impact between the gas and the blade 500 during air supply can be effectively reduced. By twisting the blade 500, the flow path of the air flow can be optimized, and the air flow disorder can be effectively avoided. Thus, the wind noise generated during the operation of the cross-flow fan can be effectively reduced, the energy loss is small, the sound insulation performance is good, and the user experience can be effectively improved. Moreover, the twisted impeller can also effectively reduce the probability of the cross-flow fan's own structure jittering. The cross-flow fan has high operation stability, low maintenance cost, and long service life.

[0039] In addition, to improve the wind-catching effect of the blade 500, the blade 500 is usually set to a curved structure, and the blade 500 in this cross-flow wind wheel is also twisted. Through the first positioning block 510, the second positioning block 520, and the third positioning block 530 with edges parallel to the rotating shaft 400, the alignment and assembly of the blade 500 with the first end cover 100, the second end cover 200, and the reinforcement piece 300 can be achieved based on the rotating shaft 400. The first positioning block 510, the second positioning block 520, and the third positioning block 530 can be respectively inserted and installed into the corresponding first positioning hole 110, the second positioning hole 210, and the third positioning hole 310 in the extending direction of the rotating shaft 400. Not only is the alignment and assembly operation simple and fast, which can effectively solve the problem of difficult alignment and assembly caused by the twisted setting of the blade 500, but also the alignment and assembly efficiency is high, the production efficiency of this cross-flow wind wheel is high. Moreover, it can effectively reduce the processing difficulty of the first positioning hole 110, the second positioning hole 210, and the third positioning hole 310. Compared with directly making the hole structure that matches the twisted blade 500, the processing difficulty of the first positioning hole 110, the second positioning hole 210, and the third positioning hole 310 based on the extending direction of the rotating shaft 400 is low, the processing efficiency of the first end cover 100, the second end cover 200, and the reinforcement piece 300 is high, and the processing cost is low, which can effectively save the manufacturing cost of this cross-flow fan. By using the first positioning block 510, the second positioning block 520, and the third positioning block 530 with larger sizes to replace the contact positioning of the blade 500 with the first end cover 100, the second end cover 200, and the reinforcement piece 300 respectively, the force directly borne by the blade 500 can be effectively reduced, the pressure on the blade 500 can be effectively reduced, and thus the structural stability and durability of the blade 500 can be effectively improved.

[0040] It can be understood that the first end cover 100 is provided with a first jack 120, the second end cover 200 is provided with a second jack 220, and the reinforcement piece 300 is provided with a third jack 320. The rotating shaft 400 passes through the first jack 120, the second jack 220, and the third jack 320. One end of the rotating shaft 400 is located on the side of the first end cover 100 away from the second end cover 200. A shaft sleeve 230 is provided on the side of the second end cover 200 away from the first end cover 100. The shaft sleeve 230 is used to connect an external drive motor, and the fixed connection of the rotating shaft 400 with the first end cover 100, the second end cover 200, and the reinforcement plate is achieved by welding or other means.

[0041] By connecting the first end cover 100, the second end cover 200, and the reinforcement plate respectively through the rotating shaft 400 and positioning each blade 500, the stability of the overall structure can be effectively improved, and the forces received by each area of the blade 500 in the extending direction of the rotating shaft 400 can be effectively balanced, which can further improve the working stability of the blade 500 and extend the service life of the blade 500.

[0042] It can be understood that the reinforcement piece 300 is provided with a plurality of ventilation relief holes 330. Through the ventilation relief holes 330, the flow effect of the air flow in the cross-flow impeller can be effectively improved, and the operation performance of the present cross-flow impeller can be effectively ensured.

[0043] It can be understood that the first end cover 100 is further provided with a first clamping groove 130 connected to one side of the first jack 120, the second end cover 200 is further provided with a second clamping groove 240 connected to one side of the second jack 220, the reinforcement piece 300 is further provided with a third clamping groove 340 connected to one side of the third jack 320, and one side of the rotating shaft 400 is provided with a clamping strip 410. The clamping strip 410 is arranged along the extending direction of the rotating shaft 400. The clamping strip 410 is clamped and connected to the first clamping groove 130, the second clamping groove 240 and the third clamping groove 340. By means of the cooperation of the clamping strip 410 with the first clamping groove 130, the second clamping groove 240 and the third clamping groove 340, the reliability of the torque transmission from the rotating shaft 400 to the first end cover 100, the second end cover 200 and the reinforcement plate can be effectively improved, and the operation stability of the present cross-flow impeller can be further improved.

[0044] It can be understood that along the direction perpendicular to the extension direction of the blade 500, the cross-sectional shape of the blade 500 is arc-shaped, which can form a good wind-catching effect.

[0045] It can be understood that the included angle α between the extending direction of each blade 500 and the rotating shaft 400 belongs to [2°, 5°], that is, α is greater than or equal to 2 degrees and less than or equal to 5 degrees. Preferably, α = 2°, which can ensure the air guiding and blowing effect and effectively control the size of the cross-flow impeller while ensuring the low-noise operation effect.

[0046] It can be understood that one side of the first positioning block 510 close to the blade 500 is provided with a first limiting piece 511, and one side of the first positioning block 510 far from the blade 500 is provided with a first riveting piece 512. The first riveting piece 512 is used for press riveting and connecting to one side of the first end cover 100 far from the second end cover 200. The first limiting piece 511 abuts against one side of the first end cover 100 close to the second end cover 200. After riveting, the cooperation of the first riveting piece 512 and the first limiting piece 511 can realize the positioning between the first positioning block 510 and the first end cover 100; one side of the second positioning block 520 close to the blade 500 is provided with a second limiting piece 521, and one side of the second positioning block 520 far from the blade 500 is provided with a second riveting piece 522. The second riveting piece 522 is used for press riveting and connecting to one side of the second end cover 200 far from the second end cover 200. The second limiting piece 521 abuts against one side of the second end cover 200 close to the second end cover 200. After riveting, the cooperation of the second riveting piece 522 and the second limiting piece 521 can realize the positioning between the second positioning block 520 and the second end cover 200. Preferably, both the first riveting piece 512 and the second riveting piece 522 realize positioning by means of press riveting.

[0047] Specifically, the shape and size of the first limiting piece 511 are equal to those of the third positioning hole 310. During installation, the reinforcing piece 300 is inserted and pushed into the blade 500 from one side of the first positioning block 510, and the third positioning hole 310 can allow the first limiting piece 511 to pass through, which can effectively ensure the smooth progress of the alignment and assembly operation.

[0048] A cross-flow fan according to an embodiment of the second aspect of the present invention includes a low-noise cross-flow impeller according to any one of the first aspect embodiments described above.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-noise cross-flow impeller, characterized in that, It includes a first end cover (100), a second end cover (200), a reinforcing piece (300), a rotating shaft (400) and a plurality of blades (500). The central connection line of the first end cover (100), the second end cover (200) and the reinforcing piece (300) is collinear with the rotating shaft (400). The rotating shaft (400) is connected to the first end cover (100). An included angle α is formed between the extending direction of the blade (500) and the rotating shaft (400), where 0 < α ≤ 30°. All the blades (500) are evenly distributed in a circumferential array around the rotating shaft (400). First positioning blocks (510) and second positioning blocks (520) are respectively provided at opposite ends of the blade (500). A third positioning block (530) is provided in the middle of the blade (500). The first positioning block (510), the second positioning block (520) and the third positioning block (530) are all straight prism-shaped with edges parallel to the rotating shaft (400). The first positioning block (510), the second positioning block (520) and the third positioning block (530) all surround the outside of the blade (500). The first end cover (100) is provided with a plurality of first positioning holes (110) respectively matching with the first positioning blocks (510). Each first positioning block (510) is respectively connected to each of the first positioning holes (110). The second end cover (200) is provided with a plurality of second positioning holes (210) respectively matching with the second positioning blocks (520). Each second positioning block (520) is respectively connected to each of the second positioning holes (210). The reinforcing piece (300) is provided with a plurality of third positioning holes (310) respectively matching with the third positioning blocks (530). Each third positioning block (530) is respectively connected to each of the third positioning holes (310).

2. The cross-flow impeller with low noise according to claim 1, wherein The first end cover (100) is provided with a first jack (120). The second end cover (200) is provided with a second jack (220). The reinforcing piece (300) is provided with a third jack (320). The rotating shaft (400) passes through the first jack (120), the second jack (220) and the third jack (320). One end of the rotating shaft (400) is located on the side of the first end cover (100) away from the second end cover (200). A shaft sleeve (230) is provided on the side of the second end cover (200) away from the first end cover (100).

3. The cross-flow impeller with low noise according to claim 2, characterized in that, The reinforcing piece (300) is provided with a plurality of ventilation relief holes (330).

4. A low-noise cross-flow impeller according to claim 2, characterized in that, The first end cover (100) is further provided with a first clamping groove (130) connected to one side of the first jack (120), the second end cover (200) is further provided with a second clamping groove (240) connected to one side of the second jack (220), the reinforcing piece (300) is further provided with a third clamping groove (340) connected to one side of the third jack (320), and one side of the rotating shaft (400) is provided with a clamping strip (410), and the clamping strip (410) is clamped and connected to the first clamping groove (130), the second clamping groove (240) and the third clamping groove (340).

5. The cross-flow impeller with low noise according to claim 1, characterized in that The cross-sectional shape of the blade (500) is arc-shaped.

6. The cross-flow impeller with low noise according to claim 1, wherein, The included angle α between the extending direction of the blade (500) and the rotating shaft (400) is in the range of [2°, 5°].

7. The cross-flow fan with low noise according to claim 1, wherein One side of the first positioning block (510) close to the blade (500) is provided with a first limiting piece (511), and one side of the first positioning block (510) away from the blade (500) is provided with a first riveting part (512), and the first riveting part (512) is used for press-riveting and connecting to the side of the first end cover (100) away from the second end cover (200), and the first limiting piece (511) abuts against the side of the first end cover (100) close to the second end cover (200); one side of the second positioning block (520) close to the blade (500) is provided with a second limiting piece (521), and one side of the second positioning block (520) away from the blade (500) is provided with a second riveting part (522), and the second riveting part (522) is used for press-riveting and connecting to the side of the second end cover (200) away from the second end cover (200), and the second limiting piece (521) abuts against the side of the second end cover (200) close to the second end cover (200).

8. A cross-flow fan, characterized in that, Comprising a low-noise cross-flow air impeller according to any one of claims 1 to 7.

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