A guide structure of a parallel double-impeller cross-flow fan

Abstract

The utility model discloses a kind of diversion structure of parallel double-impeller cross-flow fan, including first impeller, second impeller, guide vane, two volutes and support seat, the first impeller, second impeller, guide vane and two volutes are connected between two support seats, and the first impeller and second impeller are arranged in parallel symmetry, the guide vane is set between the first impeller and second impeller, two the volute is symmetrically set in the lower end outside of the first impeller and second impeller, and the upper end of the guide vane and volute is set as air inlet, the lower end of the guide vane and volute is set as air outlet, the air inlet and the air outlet are communicated. The diversion structure of the utility model solves the problem that the wind speed, wind pressure of existing cross-flow fan is smaller, and the stiffness of overlength impeller is insufficient and the air outlet is not uniform, significantly improves the performance and efficiency of fan.

Description

Technical Field

[0001] This utility model relates to the field of flow guidance technology, specifically to a flow guidance structure for a parallel double impeller crossflow fan. Background Technology

[0002] Currently, most crossflow fans use a single impeller structure. Single impeller structures have relatively low air velocity and air pressure, making them unsuitable for applications with high ventilation and air pressure requirements. Furthermore, when the impeller length exceeds a certain value (usually exceeding 1.2m), the ultra-long impeller suffers from insufficient rigidity. To address this issue, most existing longer crossflow fans employ an axially tandem double impeller structure, requiring the placement of a motor, bearings, or couplings in the middle. This results in significant air velocity loss in the connection area, leading to uneven lateral airflow.

[0003] Therefore, there is a need to provide a flow guiding structure for a parallel double impeller crossflow fan to solve the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a flow guide structure for a parallel double impeller crossflow fan, which solves the problems of low wind speed and wind pressure, insufficient rigidity of ultra-long impellers and uneven air output of existing crossflow fans, and significantly improves the performance and efficiency of the fan flow guide structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A flow guiding structure for a parallel dual-impeller crossflow fan includes a first impeller, a second impeller, a guide plate, two volutes, and a support base. The first impeller, the second impeller, the guide plate, and the two volutes are all connected between two support bases, and the first impeller and the second impeller are arranged symmetrically in parallel. The guide plate is disposed between the first impeller and the second impeller. The two volutes are symmetrically disposed on the lower outer sides of the first impeller and the second impeller. The upper ends of the guide plate and the volutes are configured as air inlets, and the lower ends of the guide plate and the volutes are configured as air outlets. The air inlets and the air outlets are connected.

[0007] As a further improvement to the above technical solution, both the first impeller and the second impeller include a spindle and a plurality of impellers. The spindle passes through the center of the plurality of impellers, and the two ends of the spindle are rotatably connected to the two support seats respectively.

[0008] As a further improvement to the above technical solution, the guide plate is configured in a T-shape, including a horizontal plate and a vertical plate. The horizontal plate is disposed at the upper end of the first impeller and the second impeller, and the vertical plate is vertically connected to the middle of the horizontal plate. The connection between the horizontal plate and the vertical plate is symmetrically provided with arc-shaped chamfers.

[0009] As a further improvement to the above technical solution, the angle of the arc chamfer is set to 30° to 60°.

[0010] As a further improvement to the above technical solution, the lower end of the vertical plate protrudes from the lowest point of the first impeller and the second impeller.

[0011] As a further improvement to the above technical solution, the guide plate is arranged at intervals with the first impeller and the second impeller to form an air duct. The upper end of the air duct is connected to the air inlet, and the lower end of the air duct is connected to the air outlet.

[0012] As a further improvement to the above technical solution, the envelope angle of the volute is set to 90°-135°, and the air outlet end of the volute extends downward with an air outlet plate.

[0013] As a further improvement to the above technical solution, the gap between the volute and the impeller is set to 3-5mm.

[0014] As a further improvement to the above technical solution, the flow guiding structure also includes a protective cover, which is disposed at the upper end of the first impeller and the second impeller, and the protective cover is connected to the flow guide plate and the volute, and the protective cover is provided with a number of mesh holes.

[0015] The beneficial effects of this utility model are:

[0016] This invention employs a parallel and symmetrical arrangement of the first and second impellers, unlike traditional single-impeller or axially arranged double-impeller structures. This allows the two impellers to cooperate during operation, generating a stronger airflow driving force, significantly increasing wind speed, wind pressure, and efficiency, thereby improving the overall performance of the fan. Furthermore, a guide plate is installed between the first and second impellers, with volutes on the outer sides of both impellers. The guide plate has symmetrically distributed arc-shaped extending guide edges on both sides, effectively separating the wind fields of the two impellers. The guide plate and volutes form an airflow channel, guiding the airflow to the outlet where it converges again, reducing airflow resistance and energy loss, and significantly improving the performance and efficiency of the fan's airflow guiding structure. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of the flow guiding structure of this utility model;

[0019] Figure 2 This is a side sectional view of the flow guiding structure of this utility model;

[0020] Figure 3 This is a front sectional view of the flow guiding structure of this utility model;

[0021] Figure 4 This is an exploded view of the flow guiding structure of this utility model.

[0022] Reference numerals in the attached drawings: 1. First impeller; 2. Second impeller; 121. Mandrel; 122. Impeller; 3. Guide plate; 31. Horizontal plate; 32. Vertical plate; 33. Chamfered corner; 4. Volute; 41. Air outlet plate; 5. Support base; 6. Air inlet; 7. Air outlet; 8. Air duct; 9. Protective cover. Detailed Implementation

[0023] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0024] Reference Figure 1 , Figure 2A flow guiding structure for a parallel dual-impeller crossflow fan includes a first impeller 1, a second impeller 2, a guide plate 3, two volutes 4, and a support base 5. The first impeller 1, the second impeller 2, the guide plate 3, and the two volutes 4 are all connected between the two support bases 5, ensuring the stability and reliability of the entire fan flow guiding structure. The guide plate 3 is disposed between the first impeller 1 and the second impeller 2, which helps to guide the airflow to flow more smoothly between the two impellers, reducing turbulence and eddies, thereby improving the efficiency and stability of the fan flow guiding structure. Furthermore, the parallel connection of the first impeller 1 and the second impeller 2... This arrangement not only makes the fan's airflow guiding structure more compact but also ensures that the airflow is evenly distributed between the two impellers, avoiding problems such as airflow deviation and imbalance. Simultaneously, the two volutes 4 are symmetrically arranged on the lower outer sides of the first impeller 1 and the second impeller 2, forming a highly efficient exhaust channel together with the guide plate 3. The upper ends of the guide plate 3 and volutes 4 are configured as air inlets 6, and the lower ends are configured as air outlets 7. The air inlets 6 and air outlets 7 are connected, allowing airflow to smoothly enter the fan and, after passing through the double impellers, to be efficiently discharged from the air outlets. Unlike traditional single-impeller or axially arranged double-impeller structures, this structure innovatively uses two parallel impellers, which not only increases the fan's airflow but may also optimize air pressure to a certain extent. This allows the fan to provide a larger airflow while maintaining lower noise and energy consumption, contributing to improving the overall performance and efficiency of the fan's airflow guiding structure.

[0025] Reference Figure 3 In this embodiment of the invention, both the first impeller 1 and the second impeller 2 include a spindle 121 and several impellers 122. The spindle 121 passes through the center of the several impellers 122, and both ends of the spindle 121 are rotatably connected to two support seats 5 to ensure the normal operation of the first impeller 1 and the second impeller 2. Specifically, the spindle 121 includes a hollow shaft in the middle and shaft ends on both sides. The hollow shaft is made of steel, and the impellers 122 are all connected to the hollow shaft, ensuring the rigidity and strength of the structure of the first impeller 1 and the second impeller 2. The use of a hollow shaft also reduces weight. The spindle 121 not only strengthens the overall rigidity of the long impeller, but also provides stable support and power transmission for the impellers 122, keeping them stable during high-speed operation. At the same time, it avoids the wind speed disturbance or wind speed drop that occurs at the connection point in the traditional axial series arrangement of double impellers, effectively ensuring the uniformity of the airflow.

[0026] Reference Figure 2In this embodiment of the present invention, the guide plate 3 is configured in a T-shape, including a horizontal plate 31 and a vertical plate 32. The horizontal plate 31 is disposed at the upper end of the first impeller 1 and the second impeller 2, and the vertical plate 32 is vertically connected to the middle of the horizontal plate 31. This not only increases the surface area of ​​the guide plate 3, enabling it to guide airflow more effectively, but also enhances its structural strength, allowing it to withstand greater airflow pressure and impact. Furthermore, the connection between the horizontal plate 31 and the vertical plate 32 is symmetrically provided with arc-shaped chamfers 33, which not only optimizes the airflow path and reduces energy loss, but also improves the stability and reliability of the fan. At the same time, by reducing the turbulence and eddies of the airflow inside the impeller fan, the arc-shaped guide edge helps to reduce the noise and vibration of the fan.

[0027] Specifically, the angle of the arc chamfer 33 of the guide plate 3 is set to 30° to 60°. Within this angle range, the airflow can flow smoothly along the guide edge without being excessively obstructed or turbulent.

[0028] Specifically, the lower end of the vertical plate 32 protrudes from the lowest end of the first impeller 1 and the second impeller 2, thereby increasing the amount of airflow output generated by the first impeller 1 and the second impeller 2.

[0029] Specifically, the guide plate 3 is arranged at intervals with the first impeller 1 and the second impeller 2 to form an air duct 8. The upper end of the air duct 8 is connected to the air inlet 6 to allow airflow to enter the impeller fan, and the lower end of the air duct 8 is connected to the air outlet 7 to allow airflow to be discharged from the impeller fan, ensuring that the airflow flows smoothly in the air duct and reducing eddies and turbulence.

[0030] Reference Figure 2 In this embodiment of the utility model, the envelope angle of the volute 4 is set to 90°-135° to optimize the collection and discharge efficiency of airflow, which can ensure that the airflow flows smoothly in the volute 4 while reducing energy loss and noise; and the air outlet end of the volute 4 extends downward with an air outlet plate 41, which helps to discharge the airflow generated by the first impeller 1 and the second impeller 2 more effectively.

[0031] Specifically, the gap between the volute and the impeller is set to 3-5mm to ensure the normal operation of the first impeller 1 and the second impeller 2, and also to facilitate the collection of airflow.

[0032] Reference Figure 4 In an embodiment of this utility model, the flow guiding structure further includes a protective cover 9, which is disposed at the upper end of the first impeller 1 and the second impeller 2, completely covering the impellers to protect them from interference or damage by external objects; and the protective cover 9 is connected to the flow guiding plate 3 and the volute 4 to form a complete structure, which enhances the overall stability and safety of the impeller fan.

[0033] Specifically, the protective cover 9 is made of a perforated plate bent into shape, so that the protective cover 9 has a number of mesh holes, thereby allowing airflow to pass freely without hindering the normal operation of the fan, while providing sufficient protection.

[0034] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A flow guiding structure for a parallel double-impeller crossflow fan, characterized in that: The device includes a first impeller, a second impeller, a guide plate, two volutes, and a support base. The first impeller, the second impeller, the guide plate, and the two volutes are all connected between two support bases, and the first impeller and the second impeller are arranged symmetrically in parallel. The guide plate is disposed between the first impeller and the second impeller. The two volutes are symmetrically disposed on the lower outer sides of the first impeller and the second impeller. The upper ends of the guide plate and the volutes are configured as air inlets, and the lower ends of the guide plate and the volutes are configured as air outlets. The air inlets and the air outlets are connected.

2. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 1, characterized in that: Both the first impeller and the second impeller include a spindle and several impellers. The spindle passes through the center of the several impellers, and the two ends of the spindle are rotatably connected to the two support seats respectively.

3. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 1, characterized in that: The guide plate is configured in a T-shape, including a horizontal plate and a vertical plate. The horizontal plate is located at the upper end of the first impeller and the second impeller, and the vertical plate is vertically connected to the middle of the horizontal plate. The connection between the horizontal plate and the vertical plate is symmetrically provided with arc-shaped chamfers.

4. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 3, characterized in that: The angle of the arc-shaped chamfer is set to 30° to 60°.

5. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 3, characterized in that: The lower end of the vertical plate protrudes from the lowest point of the first impeller and the second impeller.

6. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 1, characterized in that: The guide vanes are spaced apart from the first impeller and the second impeller to form air ducts. The upper end of the air duct is connected to the air inlet, and the lower end of the air duct is connected to the air outlet.

7. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 1, characterized in that: The envelope angle of the volute is set to 90°-135°, and an air outlet plate extends downward from the air outlet end of the volute.

8. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 2, characterized in that: The gap between the volute and the impeller is set to 3-5 mm.

9. The flow guiding structure of a parallel double-impeller crossflow fan according to claim 1, characterized in that: The flow guiding structure also includes a protective cover, which is disposed at the upper end of the first impeller and the second impeller, and the protective cover is connected to the flow guide plate and the volute. The protective cover is provided with a number of mesh holes.

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