Energy-saving high-air-volume fan

Abstract

This utility model relates to an energy-saving high-volume fan, comprising a volute and a rotor. The volute has an air outlet, and the rotor is rotatably disposed within the volute's inner cavity. The volute has an air inlet corresponding to the rotor's position. The gap between the inner wall of the volute and the rotor forms an air duct, which is divided into a second, third, fourth, and fifth air duct. The second, third, fourth, and fifth air ducts are interconnected, and the second air duct connects to the air outlet. The ratio of the size of the second air duct to the rotor's diameter is less than 1; the ratio of the size of the third air duct to the rotor's diameter is less than 1; the ratio of the size of the fourth air duct to the rotor's diameter is less than 1; the ratio of the size of the fifth air duct to the rotor's diameter is 0.53; the ratio of the air outlet's diameter to the rotor's diameter is equal to 1; and the rotor's diameter is 120mm. This design achieves both energy saving and high-efficiency air delivery.

Description

Technical Field

[0001] This utility model relates to an energy-saving high-volume fan. Background Technology

[0002] With the improvement of people's living standards, kitchen range hoods have become an important household appliance widely used to remove cooking fumes and odors. Traditional range hoods typically use centrifugal or axial fans, which have relatively simple structures and working principles, but they have some problems in practical use. One of these is that, at the same power, the air volume of traditional fans is limited, making them unable to meet the high air volume requirements of some scenarios, such as large kitchens or cooking equipment.

[0003] On the other hand, existing range hoods have the problem of high energy consumption in actual use. This is mainly because while providing sufficient air volume, more electricity is required. This high energy consumption not only increases the cost of use, but also does not meet the current social requirements for energy conservation and environmental protection.

[0004] To address these issues, existing technologies have continuously strived to improve the design of range hoods, including the structure and operating principle of the fan. However, to date, there remains a need to increase airflow and reduce energy consumption, especially to improve performance while maintaining the effectiveness of the range hood; this has become a pressing problem to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide an energy-saving high-volume fan that can more effectively utilize power, increase air volume, and reduce energy consumption.

[0006] The purpose of this utility model is achieved as follows: An energy-saving high-volume fan includes a volute and a fan wheel. The volute has an air outlet, the fan wheel is rotatably disposed inside the volute, and the volute has an air inlet corresponding to the position of the fan wheel. The gap between the inner wall of the vortex shell and the impeller forms an air duct, which is divided into a second air duct, a third air duct, a fourth air duct and a fifth air duct. The second air duct, the third air duct, the fourth air duct and the fifth air duct are connected. The second air duct is connected to the air outlet. The ratio of the size of the second air duct to the diameter of the wind turbine is less than 1; The ratio of the size of the third air duct to the diameter of the wind turbine is less than 1; The ratio of the size of the fourth air duct to the diameter of the wind turbine is less than 1; The ratio of the size of the fifth air duct to the diameter of the wind turbine is 0.53; The ratio of the diameter of the air outlet to the diameter of the impeller is equal to 1; The diameter of the wind turbine is 120mm.

[0007] By scientifically dividing the gap between the vortex casing and the impeller into multiple air ducts and limiting the ratio of each air duct to the impeller diameter, the airflow forms reasonable flow channels in different directions, thereby avoiding turbulence and backflow, and ensuring that the airflow smoothly and efficiently converges to the air outlet. At the same time, by limiting the specific ratio between the fifth air duct and the air outlet and the impeller diameter, the speed and pressure matching of the airflow are optimized, achieving higher air volume and lower energy consumption, thus achieving the dual effect of energy saving and high-efficiency air delivery.

[0008] The objective of this utility model can also be achieved by the following technical measures: Furthermore, the ratio of the size of the second air duct to the diameter of the wind turbine is 0.75; The ratio of the size of the third air duct to the diameter of the wind turbine is 0.57; The ratio of the size of the fourth air duct to the diameter of the wind turbine is 0.56.

[0009] By limiting the dimensions of the second, third, and fourth air ducts to 0.75, 0.57, and 0.56 times the impeller diameter, respectively, an optimal flow channel ratio is achieved between each air duct and the impeller. This not only ensures a smooth and sequential transition of airflow within the vortex housing, reducing turbulence and backflow, but also effectively improves airflow guidance and convergence efficiency. This significantly enhances airflow uniformity and volume output while reducing airflow resistance and energy consumption, thus achieving a synergistic effect of energy saving and high-efficiency air delivery.

[0010] Furthermore, a second air duct is formed in the area between the top inner wall of the vortex shell and the rotation center of the wind turbine; The area between the left inner wall of the vortex shell and the rotation center of the wind turbine forms a third air duct; The area between the bottom inner wall of the vortex shell and the rotation center of the wind turbine forms a fourth air duct; The area between the right inner wall of the vortex shell and the rotation center of the wind turbine forms a fifth air duct; The air outlet is located on the right side of the vortex shell.

[0011] By clearly defining the specific location of each air duct within the vortex casing, the direction of airflow inside the fan becomes clearer, facilitating the formation of a circular airflow cycle and improving the structural rationality and air delivery stability of the fan.

[0012] Furthermore, an adjustment plate is provided on the right side of the vortex shell. The adjustment plate is located inside the air outlet, and the area between the adjustment plate and the rotation center of the impeller forms the fifth air duct.

[0013] An adjustment plate is installed at the air outlet, which can flexibly change the shape and size of the fifth air duct, helping to control the airflow speed and direction, thereby further optimizing the airflow effect and improving the applicability of the fan.

[0014] Furthermore, the adjusting plate includes a lower plate and an upper inclined plate, the upper inclined plate and the lower plate are connected, the upper inclined plate is inclined toward the inner cavity of the vortex shell, and a first air duct is formed between the top inner wall of the air outlet and the inclined surface of the upper inclined plate, the first air duct is connected to the air outlet and the second air duct respectively.

[0015] The regulating plate adopts a combination structure of a lower plate and an upper inclined plate, and forms the first air duct through the upper inclined plate to realize the re-guidance and diversion of airflow, reduce eddies and backflow phenomena, and improve air outlet efficiency.

[0016] Furthermore, the ratio of the size of the first air duct to the diameter of the wind turbine is less than 1.

[0017] The size of the first air duct is limited to be smaller than the diameter of the impeller to ensure that the airflow maintains a high-speed channel state when passing through, thereby increasing wind pressure and improving the blower's air delivery capacity.

[0018] Furthermore, the ratio of the size of the first air duct to the diameter of the wind turbine is 0.61.

[0019] By setting the ratio of the first duct size to the impeller diameter to 0.61, optimal airflow guidance and velocity matching are achieved, further reducing energy consumption and improving the stability of airflow output.

[0020] Furthermore, it also includes a motor. The impeller is provided with a motor mounting cavity. The top of the motor mounting cavity has a shaft hole for connecting the motor shaft. The volute is provided with a motor mounting area. The motor mounting area is provided with annular damping pads for reducing vibration and noise generated when the motor is running. The motor is fixed in the motor mounting area and enters the motor mounting cavity. The motor shaft passes through and connects to the shaft hole, and the motor drives the impeller to rotate.

[0021] By adding annular shock-absorbing pads to the motor mounting area of ​​the volute, the motor can have good shock absorption and buffering effects while being fixedly installed, effectively reducing the vibration and noise transmitted to the fan during motor operation, and improving the stability and quietness of the whole machine operation; at the same time, the motor and the impeller are precisely connected through the shaft hole, ensuring that the impeller is evenly stressed and rotates stably, avoiding energy loss due to eccentricity or vibration, thereby further extending the service life of the motor and the fan, and achieving efficient, low-noise and durable operation.

[0022] Furthermore, the inner wall of the vortex shell is provided with a flow guide groove, which is arranged along the airflow direction of the air duct; The wind turbine has blades evenly distributed around its perimeter. Each blade has multiple guide grooves extending along the airflow direction on its surface. These guide grooves are either arc-shaped or V-shaped.

[0023] The starting end of the flow guide groove is close to the leading edge of the blade, the middle part of the flow guide groove is located in the middle of the blade, and the end of the flow guide groove is close to the end of the blade. The depth of the flow guide groove gradually increases from its starting end to its middle part, and gradually decreases from its middle part to its end. The leading edge of the blade is tilted at an angle of 15° to 25°, and the trailing edge of the blade is connected to the periphery of the wind turbine.

[0024] By setting guide grooves in the inner wall of the vortex casing that are aligned with the airflow direction, and designing arc-shaped or V-shaped guide grooves on the blade surface, the airflow is effectively guided within the duct and on the blade surface, reducing turbulence and airflow separation. At the same time, the guide grooves adopt a depth variation design of "shallow at the leading edge, deep in the middle, and shallow at the end," which can gradually accelerate and stabilize the airflow during blade rotation, improving wind pressure and air volume output. Combined with the blade leading edge tilt angle design of 15° to 25°, the air intake of the blade is smoother, which reduces energy loss and noise, and improves the fan's air delivery efficiency and overall energy-saving performance.

[0025] Furthermore, the air outlet is provided with a number of air guide ribs to reduce the frictional resistance between the air and the surface of the ribs. The air guide ribs are arranged along the airflow direction, and the cross-section of the air guide ribs is streamlined or trapezoidal. The spacing between the air guide ribs is 20-30mm. The surface of the air guide rib is provided with a low-resistance coating, which is a hydrophobic nano-coating or a micro-bump drag-reducing coating.

[0026] By setting streamlined or trapezoidal air guide ribs at the air outlet and reasonably limiting their spacing to 20-30mm, the airflow is effectively rectified and separated at the outlet, reducing turbulence and energy loss. At the same time, adding a hydrophobic nano-coating or micro-bump drag-reducing coating to the surface of the ribs further reduces the frictional resistance between the air and the ribs, making the airflow smoother. This significantly improves the fan's output efficiency and air volume stability, while also achieving energy saving and noise reduction effects.

[0027] The beneficial effects of this utility model are as follows: This invention scientifically divides the gap between the vortex shell and the impeller into multiple air ducts and limits the ratio of each air duct to the impeller diameter, allowing the airflow to form reasonable flow channels in different directions, thereby avoiding turbulence and backflow, and ensuring that the airflow smoothly and efficiently converges to the air outlet. At the same time, by limiting the specific proportional relationship between the fifth air duct and the air outlet and the impeller diameter, the speed and pressure matching of the airflow are optimized, achieving higher air volume and lower energy consumption, thus achieving the dual effects of energy saving and efficient air delivery.

[0028] In this invention, the regulating plate adopts a combination structure of a lower plate and an upper inclined plate, and forms a first air duct through the upper inclined plate to realize the re-guidance and diversion of airflow, reduce eddies and backflow phenomena, and improve air outlet efficiency.

[0029] This utility model adds an annular shock-absorbing pad to the motor mounting area of ​​the volute casing, so that the motor has good shock absorption and buffering effect while being fixedly installed, effectively reducing the vibration and noise transmitted to the fan during motor operation, and improving the stability and quietness of the whole machine operation. This invention utilizes streamlined or trapezoidal air guide ribs at the air outlet, with a reasonable spacing of 20-30mm, to effectively rectify and separate the airflow at the outlet, reducing turbulence and energy loss. Simultaneously, adding a hydrophobic nano-coating or a micro-bump drag-reducing coating to the rib surface further reduces frictional resistance between the air and the ribs, making airflow smoother. This significantly improves the fan's output efficiency and airflow stability, while also achieving energy saving and noise reduction. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of an energy-saving high-airflow fan.

[0031] Figure 2 This is a front view of an energy-saving high-airflow fan.

[0032] Figure 3 This is a schematic diagram of an energy-saving high-airflow fan (excluding part of the volute).

[0033] Figure 4 This is a schematic diagram of an energy-saving high-airflow fan (the air outlet is in the open position).

[0034] Figure 5 This is an assembly drawing for an energy-saving high-airflow fan.

[0035] Figure 6 This is another assembly view of an energy-saving high-airflow fan.

[0036] Figure 7 These are the test results for an energy-saving high-airflow fan. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 1 to 7 As shown, an energy-saving high-volume fan includes a vortex shell 6 and a fan wheel 7. The vortex shell 6 has an air outlet 61, the fan wheel 7 is rotatably disposed inside the vortex shell 6, and the vortex shell 6 has an air inlet 62 corresponding to the position of the fan wheel 7. The gap between the inner wall of the vortex shell 6 and the impeller 7 forms an air duct. The air duct is divided into a second air duct 2, a third air duct 3, a fourth air duct 4 and a fifth air duct 5. The second air duct 2, the third air duct 3, the fourth air duct 4 and the fifth air duct 5 are connected. The second air duct 2 is connected to the air outlet 61. The ratio of the size of the second air duct 2 to the diameter of the impeller 7 is less than 1; The ratio of the size of the third air duct 3 to the diameter of the wind turbine 7 is less than 1; The ratio of the size of the fourth air duct 4 to the diameter of the wind turbine 7 is less than 1; The ratio of the size of the fifth air duct 5 to the diameter of the wind turbine 7 is 0.53; The ratio of the diameter of the air outlet 61 to the diameter of the impeller 7 is equal to 1; The diameter of the wind turbine 7 is 120mm.

[0038] Furthermore, the ratio of the size of the second air duct 2 to the diameter of the impeller 7 is 0.75; The ratio of the size of the third air duct 3 to the diameter of the wind turbine 7 is 0.57; The ratio of the size of the fourth air duct 4 to the diameter of the wind turbine 7 is 0.56.

[0039] Furthermore, the area between the top inner wall of the vortex shell 6 and the rotation center of the wind turbine 7 forms a second air duct 2; The area between the left inner wall of the vortex shell 6 and the rotation center of the wind turbine 7 forms a third air duct 3; The area between the bottom inner wall of the vortex shell 6 and the rotation center of the wind turbine 7 forms a fourth air duct 4; The area between the right inner wall of the vortex shell 6 and the rotation center of the wind turbine 7 forms the fifth air duct 5; The air outlet 61 is located on the right side of the vortex shell 6.

[0040] Furthermore, an adjustment plate 9 is provided on the right side of the vortex shell 6. The adjustment plate 9 is located inside the air outlet 61, and the area between the adjustment plate 9 and the rotation center of the impeller 7 forms the fifth air duct 5.

[0041] Furthermore, the adjusting plate 9 includes a lower plate body 91 and an upper inclined plate 92. The upper inclined plate 92 and the lower plate body 91 are connected. The upper inclined plate 92 is inclined toward the inner cavity of the vortex shell 6. A first air duct 1 is formed between the top inner wall of the air outlet 61 and the inclined surface of the upper inclined plate 92. The first air duct 1 is connected to the air outlet 61 and the second air duct 2 respectively.

[0042] Furthermore, the ratio of the size of the first air duct 1 to the diameter of the impeller 7 is less than 1.

[0043] Furthermore, the ratio of the size of the first air duct 1 to the diameter of the impeller 7 is 0.61.

[0044] Furthermore, it also includes a motor. The impeller 7 is provided with a motor mounting cavity 71. The top of the motor mounting cavity 71 has a shaft hole 75 for connecting the motor shaft. The volute 6 is provided with a motor mounting area 81. The motor is fixed in the motor mounting area 81. The motor mounting area 81 is provided with annular shock-absorbing pads for reducing the vibration and noise generated when the motor is running. At the same time, the motor enters the motor mounting cavity 71, and the motor shaft passes through and connects to the shaft hole 75. The motor drives the impeller 7 to rotate.

[0045] Furthermore, the inner wall of the vortex shell 6 is provided with a flow guide groove, which is arranged along the airflow direction of the air duct; The wind turbine 7 has blades 8 evenly distributed around its periphery. Each blade 8 has multiple guide grooves extending along the airflow direction on its surface. The guide grooves are either arc-shaped or V-shaped.

[0046] The starting end of the flow guide groove is close to the leading edge of the blade 8, the middle part of the flow guide groove is located in the middle of the blade 8, and the end of the flow guide groove is close to the end of the blade 8. The depth of the flow guide groove gradually increases from its starting end to its middle part, and gradually decreases from its middle part to its end. The leading edge inclination angle of the blade 8 is set to 15° to 25°, and the trailing edge of the blade 8 is connected to the periphery of the wind turbine 7.

[0047] Furthermore, the air outlet 61 is provided with a number of air guide ribs to reduce the frictional resistance between the air and the surface of the ribs. The air guide ribs are arranged along the airflow direction, and the cross-section of the air guide ribs is streamlined or trapezoidal. The spacing between the air guide ribs is 20-30mm. The surface of the air guide rib is provided with a low-resistance coating, which is a hydrophobic nano-coating or a micro-bump drag-reducing coating.

[0048] Description of the working principle of the fan: The fan drives the impeller 7 to rotate via a motor. Air enters the vortex shell 6 through the air inlet 62. The high-speed rotation of the blades 8 of the impeller 7 generates centrifugal force, which propels the airflow along the air ducts on the inner wall of the vortex shell 6. Multiple partitioned air ducts are designed according to optimized proportions to guide the airflow step by step to the air outlet 61. During this process, the guide grooves and the guide grooves on the surface of the blades 8 work together to effectively reduce turbulence and increase the airflow speed. The airflow is finally discharged after being rectified by the guide ribs of the air outlet 61, achieving a high air volume and low energy consumption air delivery effect.

[0049] Combination Figure 7According to the air volume test report, when the fan operates at its maximum air volume of 391 m³ / h, the optimized volute structure, multi-duct ratio design, and blade guide structure enable the airflow to be efficiently converged and stably output, thereby achieving higher fluid dynamic efficiency. At the same time, while achieving high air volume output, the overall power consumption is low, and the energy consumption per unit air volume is significantly reduced, demonstrating the performance advantages of energy saving and high efficiency. Compared with traditional fans, it has lower energy consumption under the same operating conditions and better overall performance.

Claims

1. An energy-saving high-volume fan, comprising a volute (6) and a rotor (7), characterized in that: The vortex shell (6) has an air outlet (61), the impeller (7) is rotatably disposed in the inner cavity of the vortex shell (6), and the vortex shell (6) has an air inlet (62) corresponding to the position of the impeller (7). The gap between the inner wall of the vortex shell (6) and the impeller (7) forms an air duct. The air duct is divided into a second air duct (2), a third air duct (3), a fourth air duct (4) and a fifth air duct (5). The second air duct (2), the third air duct (3), the fourth air duct (4) and the fifth air duct (5) are connected. The second air duct (2) is connected to the air outlet (61). The ratio of the size of the second air duct (2) to the diameter of the impeller (7) is less than 1; The ratio of the size of the third air duct (3) to the diameter of the wind turbine (7) is less than 1; The ratio of the size of the fourth air duct (4) to the diameter of the wind turbine (7) is less than 1; The ratio of the size of the fifth air duct (5) to the diameter of the wind turbine (7) is 0.53; The ratio of the diameter of the air outlet (61) to the diameter of the impeller (7) is equal to 1; The diameter of the wind turbine (7) is 120 mm.

2. The energy-saving high-airflow fan according to claim 1, characterized in that: The ratio of the size of the second air duct (2) to the diameter of the impeller (7) is 0.75; The ratio of the size of the third air duct (3) to the diameter of the wind turbine (7) is 0.57; The ratio of the size of the fourth air duct (4) to the diameter of the wind turbine (7) is 0.

56.

3. The energy-saving high-airflow fan according to claim 1, characterized in that: The area between the top inner wall of the vortex shell (6) and the rotation center of the wind turbine (7) forms a second air duct (2). The area between the left inner wall of the vortex shell (6) and the rotation center of the wind turbine (7) forms a third air duct (3). The area between the bottom inner wall of the vortex shell (6) and the rotation center of the wind turbine (7) forms a fourth air duct (4). The area between the right inner wall of the vortex shell (6) and the rotation center of the wind turbine (7) forms the fifth air duct (5). The air outlet (61) is located on the right side of the vortex shell (6).

4. The energy-saving high-airflow fan according to claim 3, characterized in that: An adjustment plate (9) is provided on the right side of the vortex shell (6). The adjustment plate (9) is located inside the air outlet (61). The area between the adjustment plate (9) and the rotation center of the impeller (7) forms the fifth air duct (5).

5. The energy-saving high-airflow fan according to claim 4, characterized in that: The regulating plate (9) includes a lower plate (91) and an upper inclined plate (92). The upper inclined plate (92) and the lower plate (91) are connected. The upper inclined plate (92) is inclined toward the inner cavity of the vortex shell (6). A first air duct (1) is formed between the top inner wall of the air outlet (61) and the inclined surface of the upper inclined plate (92). The first air duct (1) is connected to the air outlet (61) and the second air duct (2).

6. The energy-saving high-airflow fan according to claim 5, characterized in that: The ratio of the size of the first air duct (1) to the diameter of the wind turbine (7) is less than 1.

7. The energy-saving high-airflow fan according to claim 6, characterized in that: The ratio of the size of the first air duct (1) to the diameter of the wind turbine (7) is 0.

61.

8. The energy-saving high-airflow fan according to claim 1, characterized in that: It also includes a motor. The impeller (7) is provided with a motor mounting cavity (71). The top of the motor mounting cavity (71) has a shaft hole (75) for connecting the motor shaft. The volute (6) is provided with a motor mounting area (81). The motor mounting area (81) is provided with an annular damping pad for reducing the vibration and noise generated when the motor is running. The motor is fixed in the motor mounting area (81). At the same time, the motor enters the motor mounting cavity (71). The motor shaft passes through and connects to the shaft hole (75). The motor drives the impeller (7) to rotate.

9. The energy-saving high-airflow fan according to claim 1, characterized in that: The inner wall of the vortex shell (6) is provided with a flow guide groove, which is arranged along the airflow direction of the air duct; The wind turbine (7) has blades (8) evenly distributed around its periphery. Each blade (8) has multiple guide grooves extending along the airflow direction on its surface. The guide grooves are arc-shaped or V-shaped. The starting end of the flow guide groove is close to the leading edge of the blade (8), the middle part of the flow guide groove is located in the middle of the blade (8), and the end of the flow guide groove is close to the end of the blade (8). The depth of the flow guide groove gradually increases from its starting end to its middle part, and gradually decreases from its middle part to its end. The leading edge inclination angle of the blade (8) is set to 15° to 25°, and the trailing edge of the blade (8) is connected to the periphery of the wind turbine (7).

10. The energy-saving high-airflow fan according to claim 1, characterized in that: The air outlet (61) is provided with a number of air guide ribs for reducing the frictional resistance between the air and the surface of the ribs. The air guide ribs are arranged along the airflow direction, and the cross-section of the air guide ribs is streamlined or trapezoidal. The spacing between the air guide ribs is 20-30mm. The surface of the air guide ribs is provided with a low-resistance coating, which is a hydrophobic nano coating or a micro-bump drag-reducing coating.

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