Energy-saving high-air-volume fan

Abstract

The utility model relates to an energy-saving high-air-volume fan which comprises a volute and a wind wheel, an air outlet is formed in the volute, the wind wheel is arranged in an inner cavity of the volute in a rotating mode, and an air inlet is formed in the position, corresponding to the wind wheel, of the volute. A gap between the inner wall of the volute and the wind wheel forms an air duct, the air duct is divided into a first air duct body, a second air duct body, a third air duct body, a fourth air duct body and a fifth air duct body, the first air duct body, the second air duct body, the third air duct body, the fourth air duct body and the fifth air duct body are communicated, and the first air duct body is communicated with the air outlet; the gap between the inner wall of the volute and the wind wheel is divided into a plurality of communicated air ducts (the first air duct to the fifth air duct), the flowing path of airflow is optimized, and turbulence and loss of the airflow are reduced. Particularly, the size of each air duct is precisely designed, so that the ratio of the size of each air duct to the diameter of the wind wheel is smaller than 1, the efficiency of the wind wheel is effectively improved, and larger air volume output is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of energy-saving high air volume fan. BACKGROUND

[0002] With the improvement of people's living standards, kitchen hood is widely used as an important household appliance, for removing oil smoke and odor generated during cooking. The traditional hood usually adopts centrifugal fan or axial fan, its structure and working principle are relatively simple, but there are some problems in actual use. One of them is that the air volume of traditional fan is limited under the same power, which cannot meet the requirements of some high air volume scenes, such as large kitchen or cooking equipment.

[0003] On the other hand, the existing hood has the problem of high energy consumption in actual use, which is mainly because more electric energy needs to be invested while providing enough air volume. This high energy consumption not only increases the use cost, but also does not meet the current social requirements of energy saving and environmental protection.

[0004] In order to solve these problems, the existing technology continues to improve the design of hood, including the structure and working principle of fan. However, so far, there is still a demand for improving air volume and reducing energy consumption, especially for improving performance while maintaining the effectiveness of hood, which becomes a problem to be solved in this field. SUMMARY

[0005] The utility model aims at providing a kind of energy-saving high air volume fan that can more effectively utilize power, improve air volume, and reduce energy consumption.

[0006] The utility model is realized as follows:

[0007] An energy-saving high air volume fan, comprising a scroll case and a fan wheel, the scroll case is provided with an air outlet, the fan wheel is arranged in the inner cavity of the scroll case in a rotating manner, and the scroll case is provided with an air inlet corresponding to the position of the fan wheel;

[0008] The gap between the inner wall of the scroll case and the fan wheel forms an air duct, the air duct is divided into a first air duct, a second air duct, a third air duct, a fourth air duct and a fifth air duct, the first air duct, the second air duct, the third air duct, the fourth air duct and the fifth air duct are communicated, and the first air duct communicates with the air outlet;

[0009] The ratio of the size of the first air duct to the diameter of the fan wheel is less than 1;

[0010] The ratio of the size of the second air duct to the diameter of the fan wheel is less than 1;

[0011] The ratio of the size of the third air duct to the diameter of the fan wheel is less than 1;

[0012] The ratio of the size of the fourth air duct to the diameter of the impeller is less than 1;

[0013] The ratio of the size of the fifth air duct to the diameter of the impeller is 0.55.

[0014] The ratio of the diameter of the air outlet to the diameter of the impeller is equal to 1;

[0015] The diameter of the impeller is 150mm.

[0016] By dividing the gap between the inner wall of the volute and the impeller into multiple connected air ducts (first to fifth air ducts), the flow path of the airflow is optimized, reducing turbulence and loss of airflow. In particular, by precisely designing the size of each air duct, the ratio of the size of each air duct to the diameter of the impeller is less than 1, thereby effectively improving the efficiency of the impeller and achieving greater air output. This design is particularly suitable for large kitchens or cooking scenarios that require high air volume.

[0017] By optimizing the design of the air duct structure between the volute and the impeller, the airflow flows more smoothly when passing through the air duct, reducing airflow resistance and energy loss. At the same time, the fan can provide greater air output under the same power, significantly reducing the energy consumption per unit of air volume, meeting the requirements of energy saving and environmental protection, and reducing the user's usage cost.

[0018] The ratio of the outlet diameter of the first air duct to the diameter of the impeller is designed to be 1, so that the flow rate and kinetic energy of the airflow at the outlet are in the best state, which helps to enhance the exhaust effect of the fan. The size ratio of the fifth air duct is 0.55, which effectively improves the concentration of the airflow and further improves the overall performance of the fan.

[0019] The diameter of the impeller is 150mm, and the multi-air duct design makes the entire device operate efficiently in a relatively compact volume. This design is not only suitable for traditional household range hoods, but also can be extended to commercial fields to provide solutions for high-demand scenarios.

[0020] The fan structure of this design can provide high air volume while maintaining low noise and stable operation, making it suitable for application in kitchens and cooking equipment of different sizes. By reasonably configuring the diameter of the impeller and the structure of the volute, the fan can balance performance and energy saving needs, meeting the diverse needs of household and commercial users.

[0021] While maintaining high efficient air output, the energy consumption of the fan is greatly reduced by optimizing the design of the air duct and air outlet, reducing energy waste and meeting the current social demand for energy-saving and environmentally friendly home appliances.

[0022] The purpose of the utility model can also be solved by the following technical measures:

[0023] Further, the ratio of the size of the first air duct to the diameter of the wind wheel is 0.51;

[0024] The ratio of the size of the second air duct to the diameter of the wind wheel is 0.82;

[0025] The ratio of the size of the third air duct to the diameter of the wind wheel is 0.65;

[0026] The ratio of the size of the fourth air duct to the diameter of the wind wheel is 0.61.

[0027] By precisely designing the ratio of the size of the first, second, third, and fourth air ducts to the diameter of the wind wheel (0.51, 0.82, 0.65, and 0.61 respectively), the distribution of each air duct within the scroll casing achieves a rationalized allocation of airflow paths. Each air duct optimizes the flow rate and pressure of the airflow according to its position, thereby achieving efficient air volume output that meets the needs of high air volume scenarios.

[0028] The ratio of the first air duct to the second air duct (0.51 and 0.82) is designed to be small, which helps to quickly guide the airflow into the air outlet while reducing airflow turbulence and reducing kinetic energy loss; the third air duct ratio is 0.65, providing more space for flow stabilization and pressure increase; the fourth air duct ratio is 0.61, which optimizes airflow distribution when passing through the bottom area, effectively preventing airflow separation and improving overall operating efficiency.

[0029] The precise configuration of different air duct ratios ensures uniform pressure distribution of airflow within the scroll casing, avoiding excessive or excessive pressure differences in local areas and reducing additional energy consumption. The air duct design not only optimizes the airflow flow characteristics of the fan, but also reduces the load on the wind wheel and motor while achieving high air volume output, thereby further saving energy.

[0030] The ratio design of different air ducts maximizes the transmission efficiency of airflow from the air inlet to the air outlet, especially when dealing with a large amount of oil smoke or odor, the airflow extraction process can be quickly completed. Even in large kitchen or commercial cooking scenarios, this design can maintain strong extraction capacity.

[0031] The size ratio of each air duct is optimized to avoid the generation of vortex and backflow phenomena of airflow within the scroll casing, thereby reducing the noise level during operation. Users can obtain a quieter and more comfortable experience when using it.

[0032] The first air duct ratio is small (0.51), which improves the kinetic energy transmission efficiency of the initial airflow; the third air duct ratio is large (0.65), providing sufficient pressure increase space; the fourth air duct ratio is moderate (0.61), further optimizing the smoothness of airflow discharge. This fine design of air duct ratio reduces the overall energy consumption of the fan while achieving efficient extraction, fully embodying the perfect combination of energy saving and high efficiency.

[0033] Further, the area between the right side top inner wall of the scroll and the rotation center of the impeller forms a first air duct and a second air duct;

[0034] The area between the left side inner wall of the scroll and the rotation center of the impeller forms a third air duct;

[0035] The area between the bottom inner wall of the scroll and the rotation center of the impeller forms a fourth air duct;

[0036] The area between the right side inner wall of the scroll and the rotation center of the impeller forms a fifth air duct;

[0037] The scroll is provided with an air outlet on the right side, and the air outlet is in communication with the first air duct.

[0038] The scroll forms five air ducts (first air duct to fifth air duct) according to the different positions of the right side top, left side inner wall, bottom inner wall and right side inner wall, realizing the regional flow management of air flow. Each air duct optimizes the air flow path according to the position characteristics, maximally reduces air flow turbulence and energy loss, thereby improving the overall efficiency of the fan.

[0039] The first air duct and the second air duct are formed by the right side top inner wall area of the scroll, and are directly communicated with the air outlet. This design optimizes the path of air flow in the exhaust stage, so that the air flow can be quickly concentrated to the air outlet, significantly improving the exhaust efficiency of the fan, especially when a large amount of oil fume needs to be quickly extracted.

[0040] The third air duct of the left side inner wall of the scroll provides a space for stable flow and pressure increase of the air flow. The design of this area helps to alleviate the pressure fluctuation of the air flow, ensures that the air flow entering the right side air duct is more stable, and further improves the stability and efficiency of the overall fan operation.

[0041] The fourth air duct formed between the bottom inner wall of the scroll and the rotation center of the impeller provides an independent flow channel for the air flow in the bottom area. This design effectively avoids the stagnation of air flow in the bottom area of the traditional fan, improves the utilization rate of air flow in the bottom area, and enables the fan to more efficiently handle air flow from all directions during operation.

[0042] The air outlet provided on the right side of the scroll is directly communicated with the first air duct, ensuring that the air flow can be quickly exhausted after passing through the air duct system. This design improves the exhaust efficiency while reducing the backflow and turbulence of the air flow at the air outlet, further optimizing the overall performance of the fan.

[0043] By dividing the inner wall of different areas of the volute into multiple air ducts with the rotation center of the wind wheel as the center, continuous and smooth airflow channels are formed between each air duct. This design avoids excessive concentration or deficiency of airflow in a certain area, making the exhaust effect of the fan more uniform and efficient, suitable for various complex kitchen scenes.

[0044] The design of the air duct between the volute and the wind wheel makes full use of the space around the wind wheel, achieving multi-area airflow distribution and management in a limited volume. The overall structure is compact, facilitating equipment integration, while having the advantages of high air volume and low energy consumption, meeting the demand for energy-efficient equipment in modern kitchens.

[0045] Further, it also includes a motor, the wind wheel is provided with a motor mounting cavity, the top of the motor mounting cavity is provided with a shaft hole for connecting the motor shaft, the volute is provided with a motor mounting area, the motor is fixed in the motor mounting area, at the same time the motor enters the motor mounting cavity, the motor shaft passes through and connects the shaft hole, the motor drives the wind wheel to rotate.

[0046] The motor mounting cavity and the motor mounting area of the volute are designed integrally, so that the motor can be firmly fixed in the volute. The motor shaft directly passes through the shaft hole and connects with the wind wheel, reducing the additional connecting parts and installation complexity, not only optimizing the overall space utilization of the fan, but also enhancing the operation stability of the equipment.

[0047] The motor and the wind wheel are directly connected to drive the wind wheel to rotate, eliminating the intermediate transmission device and avoiding the energy loss caused by the transmission belt or gear in traditional design, further improving the energy efficiency of the fan and meeting the energy-saving and environmental protection requirements.

[0048] The special design of the motor mounting area and the motor mounting cavity makes the installation and removal of the motor more simple and fast, effectively reducing the maintenance time and labor cost of the equipment. At the same time, the motor is directly embedded in the mounting cavity, protecting the motor from oil smoke and external environment, prolonging the service life of the motor.

[0049] The structural design of the motor mounting cavity can effectively buffer the vibration generated during the operation of the motor, reducing the noise and vibration problems during the operation of the fan. This not only improves the user experience, but also further improves the operation reliability of the equipment.

[0050] The top of the motor mounting cavity is designed with a shaft hole, which not only connects the motor shaft, but also promotes the air flow inside the equipment, assisting the heat dissipation of the motor. This design effectively reduces the risk of overheating of the motor under long-time high-load operation, improving the durability and work efficiency of the equipment.

[0051] The motor and the wind wheel are designed in an integrated manner, which can adapt to motors with different power requirements, meeting the needs of various usage scenarios from small household kitchens to large commercial kitchens. This design provides the possibility for modular upgrading of the equipment, further improving the product's application range and market competitiveness.

[0052] The design of the motor driving the wind wheel rotation is more efficient in power transmission, which can quickly produce high air volume output, especially suitable for the strong exhaust demand of kitchen oil smoke concentration. This efficient driving mechanism improves the overall performance of the fan, while ensuring the stability and reliability of the equipment in high air volume mode.

[0053] Further, the inner wall of the volute is provided with a guide groove, and the guide groove is arranged along the airflow direction of the air duct.

[0054] The guide groove on the inner wall of the volute is arranged according to the airflow direction, which can guide the airflow to flow smoothly along the air duct, avoiding the formation of airflow turbulence and vortex. This optimized design significantly reduces the air resistance in the air duct, improving the overall operating efficiency of the fan.

[0055] The presence of the guide groove improves the airflow organization in the air duct, allowing air to flow more smoothly from the air inlet to the air outlet. By reducing the energy loss of airflow in the volute, higher air volume output can be achieved under the same power, meeting the needs of high air volume scenarios.

[0056] Because the guide groove can effectively reduce airflow turbulence and turbulence, the airflow noise in the air duct is also reduced. The reduction of noise level during the operation of the fan not only improves the user experience, but also is suitable for application scenarios with high requirements for quiet environment.

[0057] In the kitchen exhaust scenario, the guide groove design can more efficiently guide the oil smoke into the air outlet, avoiding the accumulation and backflow of oil smoke in the volute. This design can quickly exhaust the oil smoke, improving the purification efficiency and use effect of the range hood.

[0058] The guide groove design improves the airflow velocity distribution inside the air duct, reducing the oil smoke particle deposition phenomenon caused by airflow stagnation. The inside of the air duct is cleaner, which not only reduces the difficulty of later cleaning and maintenance, but also prolongs the service life of the fan.

[0059] By reducing airflow resistance and vortex loss, the guide groove can allow the fan to achieve more efficient air delivery at lower power consumption. This design meets the energy-saving and environmental protection requirements, further reducing the operating cost of the equipment.

[0060] The innovative design of the guide groove on the inner wall of the volute makes the fan have more superior aerodynamic performance. This differentiated design increases the product's technical highlights and market appeal, enhancing the fan's competitive advantage in high-performance and energy-saving fields.

[0061] Further, the periphery of the wind wheel is uniformly distributed with blades, and the surface of each blade is provided with a plurality of flow guide grooves extending in the airflow direction, which are arc-shaped flow guide grooves or V-shaped flow guide grooves.

[0062] The flow guide grooves on the surface of each blade extend in the airflow direction, effectively guiding the uniform flow of air and avoiding airflow dispersion or turbulence, further improving the air delivery capacity of the wind wheel, thereby achieving higher air volume output under the same power.

[0063] The flow guide grooves can reduce friction and resistance when the airflow flows on the surface of the blade, reducing energy loss. The fan can maintain high efficiency at lower power, achieving energy-saving effect, meeting the current market demand for environmental protection and energy saving.

[0064] Arc-shaped or V-shaped flow guide grooves can smoothly disperse airflow, reducing the turbulent effect caused by airflow collision and separation, thereby reducing airflow noise during fan operation and improving user experience.

[0065] The flow guide groove design on the surface of the blade can more efficiently adsorb and remove oil smoke particles, especially in kitchen application scenarios, significantly improving the smoke exhaust efficiency of the range hood and reducing the adhesion of oil smoke on the wind wheel.

[0066] The groove design not only optimizes airflow but also strengthens the mechanical properties of the blade, increasing the blade's resistance to deformation. In long-term high-speed rotation, the blade is less likely to be damaged, thereby prolonging the service life of the wind wheel and the overall fan.

[0067] Arc-shaped flow guide grooves are suitable for scenarios requiring smooth airflow, while V-shaped flow guide grooves can accelerate airflow and are suitable for scenarios requiring high wind speed. The wind wheel can choose groove types according to application requirements, improving product adaptability and meeting the needs of different markets.

[0068] The flow guide grooves optimize the airflow distribution of the wind wheel, reducing turbulence and airflow stagnation inside the air duct, further reducing the cleaning and maintenance frequency caused by oil smoke particle deposition, and prolonging the overall cleaning cycle of the fan.

[0069] The innovative flow guide groove design on the surface of the blade increases the technical highlights of the fan, demonstrating the advantages of aerodynamic optimization and providing stronger market competitiveness for the product, helping to occupy a leading position in the energy-efficient field.

[0070] Further, the starting end of the guide groove is close to the blade leading edge, the middle part of the guide groove is located in the middle of the blade, and the end of the guide groove is close to the end of the blade. The depth of the guide groove gradually deepens from the starting end to the middle part, and gradually shallows from the middle part to the end.

[0071] The depth of the guide groove gradually deepens from the starting end to the middle part, and gradually shallows from the middle part to the end. This change design can effectively guide the acceleration and deceleration process of the airflow, reduce the airflow separation phenomenon, and make the control of the wind wheel to the airflow more smooth, thereby significantly improving the overall efficiency of the fan.

[0072] The shallow groove at the starting end can smoothly guide the initial airflow to enter. As the depth deepens, the middle part provides a larger airflow passage, thereby enhancing the wind output capacity. The gradually shallow design at the end reduces the reaction force of the airflow impact on the blade, improving the wind pressure output of the wind wheel.

[0073] The gradual change design of the groove depth smooths the acceleration and deceleration process of the airflow, effectively reduces the turbulence and turbulence caused by sudden changes in airflow, thereby reducing the noise during the operation of the wind wheel and improving the quiet performance of the fan.

[0074] By optimizing the airflow path, the energy loss caused by airflow blockage and turbulence is reduced, making the fan more efficient during operation, providing higher wind output with lower power consumption, and further achieving the energy saving goal.

[0075] The depth-gradually-changing guide groove design reduces the impact force of the airflow on the leading edge and the end of the blade, avoids the situation of local pressure concentration, thereby reducing the risk of fatigue damage of the blade and prolonging the service life of the wind wheel.

[0076] The depth-changing design can flexibly adapt to different working condition requirements. In high wind demand, the deep groove middle part can significantly increase the airflow passage; and in low wind condition, the smooth convergence of the shallow groove end effectively reduces the excess airflow discharge, improving the adaptability of the wind wheel.

[0077] The gradual change of the groove depth optimizes the guiding effect of the airflow, so that the oil smoke particles can be quickly adsorbed and discharged when entering the blade surface, reducing the attachment of oil smoke on the wind wheel, improving the exhaust efficiency of the fan in the kitchen scene, and reducing the cleaning frequency.

[0078] Further, the leading edge of the blade is inclined at an angle of 15° to 25°, and the trailing edge of the blade is connected to the periphery of the wind wheel.

[0079] The blade leading edge inclination angle is set to 15° to 25°, which can effectively optimize the angle of airflow entering the blade, reduce airflow reversal or resistance, and improve the wind wheel's ability to capture airflow. This design can significantly improve the wind output efficiency of the wind wheel, enabling the fan to achieve higher air volume under the same power.

[0080] An appropriate leading edge inclination angle helps improve the aerodynamic performance of the blade, reduces airflow resistance, and reduces frictional losses between the blade and airflow. By reducing energy loss, the fan can achieve the same or higher output effect with lower power consumption, achieving energy-saving goals.

[0081] The inclination angle of the blade leading edge allows airflow to flow smoothly over the blade surface, reducing the instability caused by airflow impact. This avoids the generation of airflow turbulence and turbulence, making the fan run more smoothly and prolonging the service life of the wind wheel and fan.

[0082] The inclination angle of the leading edge effectively guides airflow into the wind wheel, reducing the abruptness between airflow and blade surface and reducing airflow turbulence. Smooth airflow transition helps reduce noise levels during operation and improves the quiet performance of the fan.

[0083] An appropriate inclination angle optimizes the airflow guide path, allowing airflow to flow smoothly through the blade surface, reducing reverse airflow and vortex formation, thereby reducing pressure loss and improving the overall efficiency of the fan.

[0084] The 15° to 25° leading edge inclination angle allows the blade to maintain high aerodynamic performance under various operating conditions, adapting to different load and wind speed requirements, ensuring excellent operating performance of the fan under different working conditions, and having stronger adaptability.

[0085] The inclination design of the blade leading edge helps reduce airflow pressure impact on the blade, allowing airflow to be evenly distributed on the blade surface, reducing mechanical fatigue of the blade, improving the structural strength and stability of the blade, and prolonging the service life of the wind wheel.

[0086] The inclination angle of the blade leading edge not only benefits the performance of a single blade, but also effectively optimizes the airflow matching between the wind wheel and the vortex shell air duct. Through efficient cooperation with the air duct, the fan can provide more stable air volume output and improve the performance of the entire system.

[0087] The beneficial effects of the present utility model are as follows:

[0088] The utility model discloses, through the wind channel is divided into multiple passages, and the design suitable wind channel size ratio (especially the size ratio of the fifth wind channel and the wind wheel diameter is 0.55), effectively promoted the air volume that fan can handle in unit time, improved the whole air volume output.

[0089] The utility model discloses, through the design multiple wind channels (such as first wind channel to fifth wind channel), and the proportion of the size of the wind channel and the diameter of the wind wheel is reasonably arranged, can effectively reduce the pressure loss of airflow, make the airflow more stablely pass through each wind channel, reduce unnecessary energy loss, thereby reduce the overall energy consumption, meet the requirement of energy saving and environmental protection.

[0090] The utility model discloses, through the reasonable wind channel design, airflow can be evenly distributed before entering the air outlet, reduced the influence of uneven airflow to the operation of fan. Especially the design of the flow guide groove can effectively control the directionality of airflow, reduce the turbulence of airflow, improve the operation stability of fan, prolong the service life of fan and its assembly.

[0091] The utility model discloses, the close cooperation design between the wind wheel and motor, especially the connecting mode of motor installation cavity and pivot, ensures that motor drives the high -efficient rotation of wind wheel. This matching optimization makes fan can be high -efficient operation under lower power, improves the performance and energy efficiency ratio of fan.

[0092] The utility model discloses, the multiple flow guide grooves (such as arc or V-shaped groove) on the design of wind wheel blade can effectively guide airflow, reduce the turbulence of airflow, improve the efficiency of airflow through the wind wheel. The depth change design (from the starting end to the end gradually deepens again shallow) of these flow guide grooves further optimizes the airflow path, improves the overall aerodynamic performance of wind wheel.

[0093] The utility model discloses, through the reasonable blade leading edge inclination angle (15 to 25), airflow can flow through the blade surface stably, reduced the formation of airflow impact and turbulence, thereby reduce the noise of fan in the operation process. This has important significance for the application scene (such as kitchen, office etc.) that requires low noise environment.

[0094] The utility model discloses, due to the optimization of wind channel and wind wheel design, makes this fan can keep higher operation efficiency and stability under the operation condition of different load, different wind speed. This makes fan can effectively adapt in many different environments, has more extensive application prospect. ACCURACY

[0095] Figure 1 It is the schematic diagram of energy-saving high air volume fan.

[0096] Figure 2Schematic diagram of energy-saving high-air-volume fan (part of scroll case is excluded).

[0097] Figure 3 Schematic diagram of energy-saving high-air-volume fan (part of scroll case is excluded).

[0098] Figure 4 Schematic diagram of energy-saving high-air-volume fan (air outlet is in open state).

[0099] Figure 5 Assembly diagram of energy-saving high-air-volume fan.

[0100] Figure 6 Another angle assembly diagram of energy-saving high-air-volume fan. DETAILED DESCRIPTION

[0101] The utility model will be further described in connection with the drawings and embodiments:

[0102] Embodiments, in connection with Figures 1 to 6 As shown in the figure, an energy-saving high-air-volume fan comprises a scroll case 6 and a wind wheel 7, the scroll case 6 is provided with an air outlet 61, the wind wheel 7 is rotatably arranged in the inner cavity of the scroll case 6, and the scroll case 6 is provided with an air inlet 62 corresponding to the position of the wind wheel 7;

[0103] The gap between the inner wall of the scroll case 6 and the wind wheel 7 forms an air duct, the air duct is divided into a first air duct 1, a second air duct 2, a third air duct 3, a fourth air duct 4 and a fifth air duct 5, the first air duct 1, the second air duct 2, the third air duct 3, the fourth air duct 4 and the fifth air duct 5 are communicated, and the first air duct 1 is communicated with the air outlet 61;

[0104] The ratio of the size of the first air duct 1 to the diameter of the wind wheel 7 is less than 1;

[0105] The ratio of the size of the second air duct 2 to the diameter of the wind wheel 7 is less than 1;

[0106] The ratio of the size of the third air duct 3 to the diameter of the wind wheel 7 is less than 1;

[0107] The ratio of the size of the fourth air duct 4 to the diameter of the wind wheel 7 is less than 1;

[0108] The ratio of the size of the fifth air duct 5 to the diameter of the wind wheel 7 is 0.55.

[0109] The ratio of the diameter of the air outlet 61 to the diameter of the wind wheel 7 is equal to 1;

[0110] The diameter of the wind wheel 7 is 150mm.

[0111] Further, the ratio of the size of the first air duct 1 to the diameter of the wind wheel 7 is 0.51;

[0112] The ratio of the size of the second air duct 2 to the diameter of the wind wheel 7 is 0.82;

[0113] The ratio of the size of the third air duct 3 to the diameter of the wind wheel 7 is 0.65;

[0114] The ratio of the size of the fourth air duct 4 to the diameter of the wind wheel 7 is 0.61.

[0115] Further, the area between the right top inner wall of the volute 6 and the rotation center of the wind wheel 7 forms the first air duct 1 and the second air duct 2;

[0116] The area between the left inner wall of the volute 6 and the rotation center of the wind wheel 7 forms the third air duct 3;

[0117] The area between the bottom inner wall of the volute 6 and the rotation center of the wind wheel 7 forms the fourth air duct 4;

[0118] The area between the right inner wall of the volute 6 and the rotation center of the wind wheel 7 forms the fifth air duct 5;

[0119] The right side of the volute 6 is provided with the air outlet 61, and the air outlet 61 is in communication with the first air duct 1.

[0120] Further, an electric motor is further included, the wind wheel 7 is provided with an electric motor mounting cavity 71, the top of the electric motor mounting cavity 71 is provided with a shaft hole 75 for connecting the rotating shaft of the electric motor, the volute 6 is provided with an electric motor mounting area 81, the electric motor is fixed in the electric motor mounting area 81, and the electric motor enters the electric motor mounting cavity 71, the rotating shaft of the electric motor passes through and is connected to the shaft hole 75, and the electric motor drives the wind wheel 7 to rotate.

[0121] Further, the inner wall of the volute 6 is provided with a flow guide groove, and the flow guide groove is arranged along the air flow direction of the air duct.

[0122] Further, the periphery of the wind wheel 7 is uniformly distributed with blades 8, the surface of each blade 8 is provided with a plurality of flow guide grooves extending along the air flow direction, and the flow guide grooves are arc-shaped flow guide grooves or V-shaped flow guide grooves.

[0123] Further, 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 at the middle part of the blade 8, and the end of the flow guide groove is close to the end of the blade 8, and the depth of the flow guide groove gradually deepens from the starting end to the middle part and gradually becomes shallower from the middle part to the end.

[0124] Further, the inclination angle of the leading edge of the blade is 15° to 25°, and the trailing edge of the blade 8 is connected to the periphery of the wind wheel 7.

[0125] In combination with the table (test results of the energy-saving high air volume fan) shown below, the fluid dynamic efficiency of the product of the utility model is higher and the energy consumption efficiency is lower when reaching the maximum air volume.

[0126]

Claims

1. An energy saving high air volume fan comprising a scroll casing (6) and an impeller (7), characterized in that: The volute (6) is provided with an air outlet (61), and the air wheel (7) is arranged in the inner cavity of the volute (6) in a rotating manner. The gap between the inner wall of the volute (6) and the air wheel (7) forms an air duct, which is divided into a first air duct (1), a second air duct (2), a third air duct (3), a fourth air duct (4) and a fifth air duct (5), and the first air duct (1), the second air duct (2), the third air duct (3), the fourth air duct (4) and the fifth air duct (5) are communicated, and the first air duct (1) is communicated with the air outlet (61). The ratio of the size of the first air duct (1) to the diameter of the air wheel (7) is less than 1. The ratio of the size of the second air duct (2) to the diameter of the air wheel (7) is less than 1. The ratio of the size of the third air duct (3) to the diameter of the air wheel (7) is less than 1. The ratio of the size of the fourth air duct (4) to the diameter of the air wheel (7) is less than 1. The ratio of the size of the fifth air duct (5) to the diameter of the air wheel (7) is 0.

55. The ratio of the diameter of the air outlet (61) to the diameter of the air wheel (7) is equal to 1. The diameter of the air wheel (7) is 150mm.

2. The energy-saving high-air-volume fan according to claim 1, wherein: The ratio of the size of the first air duct (1) to the diameter of the air wheel (7) is 0.

51. The ratio of the size of the second air duct (2) to the diameter of the air wheel (7) is 0.

82. The ratio of the size of the third air duct (3) to the diameter of the air wheel (7) is 0.

65. The ratio of the size of the fourth air duct (4) to the diameter of the air wheel (7) is 0.

61.

3. The energy efficient high air volume fan as claimed in claim 1 wherein: The area between the right top inner wall of the volute (6) and the rotation center of the air wheel (7) forms the first air duct (1) and the second air duct (2). The area between the left inner wall of the volute (6) and the rotation center of the air wheel (7) forms the third air duct (3). The area between the bottom inner wall of the volute (6) and the rotation center of the air wheel (7) forms the fourth air duct (4). The area between the right inner wall of the volute (6) and the rotation center of the air wheel (7) forms the fifth air duct (5). The right side of the volute (6) is provided with the air outlet (61), and the air outlet (61) is communicated with the first air duct (1).

4. The energy efficient high air volume fan of claim 1, wherein: Further comprising a motor, the air wheel (7) is provided with a motor mounting cavity (71), the top of the motor mounting cavity (71) is provided with a shaft hole (75) for connecting the rotating shaft of the motor, the volute (6) is provided with a motor mounting area (81), the motor is fixed in the motor mounting area (81), and the motor enters the motor mounting cavity (71) at the same time, the rotating shaft of the motor passes through and is connected with the shaft hole (75), and the motor drives the air wheel (7) to rotate.

5. The energy efficient high air volume fan of claim 1, wherein: The inner wall of the volute (6) is provided with a flow guide groove, and the flow guide groove is arranged along the airflow direction of the air duct.

6. The energy efficient high air volume fan of claim 1, wherein: The periphery of the air wheel (7) is uniformly distributed with blades (8), and the surface of each blade (8) is provided with a plurality of flow guide grooves extending along the airflow direction, and the flow guide grooves are arc-shaped flow guide grooves or V-shaped flow guide grooves.

7. The energy-efficient high-air-volume fan of claim 6, wherein: The starting end of the guide groove is close to the leading edge of the blade (8), the middle part of the guide groove is located in the middle part of the blade (8), and the terminal end of the guide groove is close to the terminal end of the blade (8), the depth of the guide groove gradually deepens from the starting end to the middle part, and gradually becomes shallow from the middle part to the terminal end.

8. The energy-efficient high-air-volume fan according to claim 6 or 7, characterized in that: The leading edge of the blade (8) is provided with an inclination angle of 15° to 25°, and the trailing edge of the blade (8) is connected to the periphery of the wind wheel (7).

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