Air duct system

Abstract

The utility model discloses an air duct system which comprises an air duct shell, a wind wheel and a motor, and the motor and the wind wheel are arranged in the air duct shell. One end of the air duct shell is an air inlet end face, the other end of the air duct shell is an air outlet end face, and the air inlet end face and the air outlet end face are connected through a side slope to form an air duct cavity; the air inlet end face is provided with an air inlet port, and the air outlet end face is provided with an air outlet port. The sectional area of the air inlet end face is smaller than that of the air outlet end face, so that the air duct shell is of a big-end-up structure. According to the air duct system, the air duct shell with the large upper portion and the small lower portion is designed, on the premise that the same wind wheel is used, the air outlet area of the designed air duct system is larger, air outlet is more uniform, the air speed is stable, the stability and reliability of the air duct system are improved, compared with a volute-shaped air duct, the structural design with the large upper portion and the small lower portion is simpler, and cost is lower. And the manufacturing and processing costs are lower.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air duct, specifically relates to an air duct system. BACKGROUND

[0002] As a component in a ventilation system for guiding and transporting airflow, the design and shape of an air duct are crucial to the efficiency and performance of the system. Currently, cylindrical and volute-shaped air ducts are the most common shapes on the market, each with unique characteristics and suitable scenarios. However, both cylindrical and volute-shaped air ducts have potential for improvement. For example, cylindrical air ducts may face issues with uneven airflow distribution, while volute-shaped air ducts may increase manufacturing and installation difficulty due to their complex shape. SUMMARY

[0003] The utility model aims at solving the above technical problems in prior art, provides an air duct system, it is reasonable in design, and the practicality is strong, the air duct shell of big down small design makes the air duct system of design of the application be bigger in the premise of using same wind wheel, and the air outlet area is more uniform, the wind speed is stable, improves the stability and reliability of air duct system, and relative to volute-shaped air duct, this big down small structure design is also more simple, and the manufacturing and processing cost are lower.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] An air duct system, comprising an air duct shell, a fan wheel and a motor, the motor and the fan wheel are arranged in the air duct shell; one end of the air duct shell is an air inlet end face, the other end of the air duct shell is an air outlet end face, the air inlet end face and the air outlet end face are connected by a side inclined surface and form an air duct cavity; an air inlet port is arranged on the air inlet end face, and an air outlet port is arranged on the air outlet end face; the cross-sectional area of the air inlet end face is smaller than that of the air outlet end face, so that the air duct shell has an upper large and lower small structure.

[0006] Further, the air inlet end face and the air outlet end face are both circular, so that the air duct shell has a circular truncated cone structure, which is clever and reasonable in design. The circular design of the air inlet and outlet end faces makes the airflow distribution in the air duct cavity more uniform, reducing air resistance. The circular truncated cone air duct shell can guide the airflow to flow more smoothly in the air duct cavity, reducing energy consumption.

[0007] Further, a wind guide ring is arranged at the air inlet port, and the wind guide ring is protrudingly arranged towards the air duct cavity. The wind guide ring can guide the airflow to enter the air duct cavity smoothly from the air inlet port, reducing turbulence and turbulence of the airflow at the air inlet port, improving the stability and efficiency of the airflow, and also helping the uniform distribution of the airflow in the air duct cavity. The wind guide ring is made of metal material to ensure the structural strength and improve the overall structural firmness and stability of the air inlet end face.

[0008] Further, the inner side wall of the air guide ring is flush with the side wall of the air inlet port, and the design is ingenious, the flush design can reduce the resistance, and the smooth transition of the gas into the air duct cavity is more conducive to maintaining the stability and continuity of the airflow.

[0009] Further, the air guide ring is protrudingly arranged towards the air duct cavity, one end of the air guide ring is fixed with the air inlet end face, and the other end of the air guide ring extends into the air inlet of the wind wheel, and the structure design is ingenious and reasonable, which can more effectively guide the airflow into the air duct cavity, so that a stable airflow field is formed in front of the air inlet of the wind wheel, the turbulence and vortex of the airflow at the air inlet of the wind wheel are reduced, and the air inlet efficiency and performance of the wind wheel are improved.

[0010] Based on the design method of the air duct shell of the above-mentioned air duct system, the method comprises the following steps:

[0011] 1) the air duct shell is designed based on a backward inclined wind wheel, the diameter of the backward inclined wind wheel is a, the height is b, the range of a is 200mm-280mm, the basic circle diameter R1 of the air duct shell is calculated first, the correction coefficient alpha1 is 0.787878, and the basic circle diameter R1 of the air duct shell is a / alpha1;

[0012] 2) the air inlet end face diameter R2 of the air duct shell is calculated, the correction coefficient alpha2 is 0.7878, the diameter a of the wind wheel is between 200mm and 280mm, then the basic number 200 is used, and the air inlet end face diameter R2 of the air duct shell is the basic number 200 / alpha2;

[0013] 3) the air outlet end face diameter R3 of the air duct shell is calculated, the correction coefficient alpha3 is 0.2121, R3=R1+(R1 × alpha3);

[0014] 4) the height of the air duct shell is adjusted according to the thickness of the motor, and the distance d between the bottom surface of the wind wheel and the air inlet end face of the air duct shell is ensured to be between 9mm and 10mm.

[0015] The utility model discloses the above technical scheme has the following beneficial effects:

[0016] The utility model discloses reasonable, practicality is strong, design big down small air duct shell, make in the same wind wheel under the premise, the air outlet area of the air duct system designed in the application is larger, and the air outlet is more uniform, and the wind speed is stable, improves the stability and reliability of the air duct system, and compared with the volute air duct, and this kind of big down small structure design is also more simple, and the manufacturing and processing cost are lower. Under the kinetic energy of motor, the wind wheel rotates at high speed, and a negative pressure layer is generated at the air inlet port, so that the airflow enters the air duct cavity, and the airflow is thrown to the periphery of the wind wheel under the centrifugal action of the wind wheel, and flows to the air outlet port along the air duct cavity.

[0017] The utility model discloses a reasonable design air duct shell's air inlet end face, the size of air outlet end face makes the whole air duct shell present the circular table structure of big down small, product air outlet area is bigger, and air outlet is more even, and the wind speed is also more stable, and according to the actual size of motor, the spacing range between the bottom surface distance of wind wheel and air inlet end face is reasonably adjusted, thereby helping to reduce airflow turbulence and noise, improve the stability of whole air duct system operation, improve overall performance. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model makes further explanation in combination with the drawings:

[0019] Figure 1 It is the structure schematic diagram of a kind of air duct system of the utility model;

[0020] Figure 2 It is the internal section structure schematic diagram of the utility model;

[0021] Figure 3 It is Figure 1 The top surface structure schematic diagram of;

[0022] Figure 4 It is the air inlet, air outlet schematic diagram in the utility model;

[0023] Figure 5 It is the three-dimensional structure schematic diagram of the utility model;

[0024] Figure 6 It is Figure 5 The structure schematic diagram of another view.

[0025] In the drawing, 1-air duct shell;2-wind wheel;3-motor;4-air inlet end face;5-air outlet end face;6-side slope;7-air inlet port;8-air outlet port;9-air guide ring;10-air duct cavity. DETAILED DESCRIPTION

[0026] As Figures 1 to 6 Shown, it is a kind of air duct system of the utility model, including air duct shell 1, wind wheel 2 and motor 3, motor 3 and wind wheel 2 are located in air duct shell 1;One end of air duct shell 1 is air inlet end face 4, the other end of air duct shell 1 is air outlet end face 5, air inlet end face 4 and air outlet end face 5 are connected through side slope 6 and form air duct cavity 10;Air inlet end face 4 is provided with air inlet port 7, and air outlet end face 5 is provided with air outlet port 8;Air inlet port 7, air outlet port 8 are connected with air duct cavity 10 and are conducted through, the cross-sectional area of air inlet end face 4 is less than the cross-sectional area of air outlet end face 5, so that air duct shell 1 presents big down small structure.

[0027] The air inlet end face 4 and the air outlet end face 5 are circular, so that the air duct shell 1 is in a circular truncated cone structure, the air inlet port 7 and the air outlet port 8 are also circular, the air inlet end face 4 is provided with the air inlet port 7, and the air outlet port 8 has a hole diameter matched with the diameter of the air outlet end face 5, so that the air outlet end face 5 is the air outlet port 8, the design is ingenious and reasonable, the air inlet end face 5 and the air outlet port 8 are circular, so that the airflow is more evenly distributed in the air duct cavity 10, the local resistance and uneven wind speed problem is reduced, and the circular design can ensure the structural stability of the air duct shell 1; the circular truncated cone air duct shell 1 can guide the airflow to flow more smoothly in the air duct cavity 10, reduce energy consumption, so that the air duct cavity 10 is also in a circular truncated cone shape, the smooth inner wall of the circular truncated cone shape also helps to reduce noise and improve the stability and comfort of the system, and the manufacturing process of the circular design is relatively simple, which helps to reduce the manufacturing cost and is convenient for installation and maintenance of the air duct system.

[0028] The air inlet port 7 is provided with a wind guide ring 9, the wind guide ring 9 can guide the airflow to enter the air duct cavity 10 from the air inlet port 7 smoothly, reduce the turbulence and turbulence of the airflow at the air inlet port 7, improve the stability and efficiency of the airflow, and also help the airflow to be evenly distributed in the air duct cavity 10; the wind guide ring 9 is made of metal material, so as to ensure the structural strength and improve the overall structural firmness and stability of the air inlet end face 4. The inner side wall of the wind guide ring 9 is flush with the side wall of the air inlet port 7, and the design is ingenious and flush, which can reduce the resistance and is more conducive to the smooth transition of the gas entering the air duct cavity 10, reduce the energy consumption, and help to maintain the stability and continuity of the airflow. The wind guide ring 9 is protrudingly arranged towards the air duct cavity 10, one end of the wind guide ring 9 is fixed with the air inlet end face 4, and the other end of the wind guide ring 9 extends into the air inlet of the wind wheel 2, so that the structure design is ingenious and reasonable, the airflow can be more effectively guided into the air duct cavity 10, so that a stable airflow field is formed in front of the air inlet of the wind wheel 2, the turbulence and vortex of the airflow at the air inlet of the wind wheel 2 are reduced, and the air inlet efficiency and performance of the wind wheel 2 are improved.

[0029] The utility model discloses reasonable, practical, design the air duct shell 1 of big upper small lower, make the air outlet area of the air duct system designed in the application be larger under the premise of using same wind wheel 2, and the air outlet is also more uniform, and the wind speed is stable, improve the stability and reliability of the air duct system, and relative to the volute air duct, this kind of big upper small lower structure design is also more simple, and the manufacturing and processing cost are lower. Under the kinetic energy of motor 3, the wind wheel 2 rotates at high speed, and a negative pressure layer is generated at the air inlet port 7, so that the airflow enters the air duct cavity 10, and the airflow is thrown to the periphery of the wind wheel 2 under the centrifugal action of the wind wheel 2, flows along the air duct cavity 10 and flows to the air outlet port 8.

[0030] Based on the design method of the air duct shell 1 of the air duct system, the method comprises the following steps:

[0031] 1) the wind tunnel shell 1 is designed based on the backward inclined wind wheel 2, the diameter of the backward inclined wind wheel 2 is a, the height is b, a is in the range of 200mm-280mm, the basic circle diameter R1 of the wind tunnel shell 1 is calculated first, the correction coefficient alpha1 is 0.787878, and the basic circle diameter R1 of the wind tunnel shell 1 is a / alpha1;

[0032] 2) the diameter R2 of the air inlet end face 4 of the wind tunnel shell 1 is calculated, the correction coefficient alpha2 is 0.7878, the diameter a of the wind wheel 2 is in the range of 200mm-280mm, the base number 200 is adopted, and the diameter R2 of the air inlet end face 4 of the wind tunnel shell 1 is the base number 200 / alpha2;

[0033] 3) the diameter R3 of the air outlet end face 5 of the wind tunnel shell 1 is calculated, the correction coefficient alpha3 is 0.2121, R3=R1+(R1 × alpha3);

[0034] 4) the height of the wind tunnel shell is adjusted according to the thickness of the motor 3, and the distance d between the bottom surface of the wind wheel 2 and the air inlet end face 4 of the wind tunnel shell 1 is ensured to be in the range of 9mm-10mm.

[0035] Embodiments of the utility model:

[0036] 1) the wind tunnel shell 1 is designed based on the backward inclined wind wheel 2, the diameter of the backward inclined wind wheel 2 is a=260mm, the height is b=145mm, the basic circle diameter R1 of the wind tunnel shell 1 is calculated first, the correction coefficient alpha1 is 0.787878, and the basic circle diameter R1 of the wind tunnel shell 1 is 260mm / 0.787878 approximately 330mm;

[0037] 2) the diameter R2 of the air inlet end face 4 of the wind tunnel shell 1 is calculated, the correction coefficient alpha2 is 0.7878, the diameter a of the wind wheel 2 is 260mm, 260mm is in the range of 200mm-280mm, so the base number 200 is adopted, and the diameter R2 of the air inlet end face 4 of the wind tunnel shell 1 is 200mm / 0.7878 approximately 253.8mm;

[0038] 3) the diameter R3 of the air outlet end face 5 of the wind tunnel shell 1 is calculated, the correction coefficient alpha3 is 0.2121, R3=330mm+(330mm × 0.2121) approximately 440mm;

[0039] 4) the height of the wind tunnel shell is adjusted according to the thickness of the motor 3, and the distance d between the bottom surface of the wind wheel 2 and the air inlet end face 4 of the wind tunnel shell 1 is ensured to be in the range of 9mm-10mm.

[0040] The utility model discloses a reasonable design air duct shell 1's air inlet end face 4, air outlet end face 5's size makes the whole air duct shell 1 presents the circular table structure of big down small, product air outlet area is bigger, and air outlet is more even, and wind speed is also more stable, and according to the actual size of motor 3 reasonable adjustment air wheel 2 bottom surface distance air inlet end face 4 between the spacing range, thereby help to reduce airflow turbulence and noise, improve the stability of whole air duct system operation, improve overall performance.

[0041] The above is only the specific embodiment of the utility model, but the technical features of the utility model are not limited to this. Any simple change, equivalent replacement or modification, etc. made on the basis of the utility model to solve basically the same technical problem and realize basically the same technical effect is covered in the protection scope of the utility model.

Claims

1. A wind tunnel system, comprising a wind tunnel shell, a wind wheel and a motor, the motor and the wind wheel being arranged in the wind tunnel shell; characterized in that: one end of the wind tunnel shell is an air inlet end face, the other end of the wind tunnel shell is an air outlet end face, the air inlet end face and the air outlet end face are connected by a side slope and form a wind tunnel cavity; an air inlet port is arranged on the air inlet end face, and an air outlet port is arranged on the air outlet end face; the cross-sectional area of the air inlet end face is smaller than that of the air outlet end face, so that the wind tunnel shell has an upper large and lower small structure.

2. A duct system according to claim 1, wherein: The air inlet end face and the air outlet end face are both circular, so that the wind tunnel shell has a circular truncated cone structure.

3. A duct system according to claim 1, wherein: A wind guide ring is arranged at the air inlet port.

4. A duct system according to claim 3, wherein: The inner side wall of the wind guide ring is flush with the side wall of the air inlet port.

5. A duct system according to claim 3, wherein: The wind guide ring is convexly arranged towards the wind tunnel cavity, one end of the wind guide ring is fixed with the air inlet end face, and the other end of the wind guide ring extends into the air inlet of the wind wheel.

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