Efficient negative-pressure butterfly-shaped door shaft circulating fan

Abstract

The utility model relates to the technical field of fan equipment, in particular to a high-efficiency negative-pressure butterfly-shaped door shaft circulation fan, which comprises a shell and is characterized in that an air inlet of the shell adopts a circular-arc-shaped horn mouth design, a square flange is arranged on the outer side of the circular-arc-shaped horn mouth, a diffusion cylinder is arranged at an air outlet of the shell, and a fan blade is arranged on the diffusion cylinder. An inclined butterfly door support frame is arranged in the diffusion cylinder; a butterfly-shaped door is further arranged in the diffusion cylinder and connected with a fixing frame through a hinge structure, and the fixing frame is installed on the supporting frame. According to the fan, the long diffusion barrel design is adopted at the air outlet, a part of dynamic pressure is effectively converted into static pressure, and the overall efficiency of the fan is improved; according to the fan, the arc-shaped horn mouth design is adopted at the air inlet, so that air inflow is streamlined, rotation and turbulence of airflow are reduced, the airflow is more stable, resistance is reduced, and the efficiency of the fan is improved; the square flange is additionally arranged at the air inlet, so that the hole is more convenient to block, and the sealing effect is better.

Description

Technical Field

[0001] This utility model relates to the field of fan equipment technology, specifically to a high-efficiency negative pressure butterfly door axial flow fan. Background Technology

[0002] Fans are machines that use input mechanical energy to increase gas pressure and expel gas. They are widely used for ventilation, dust removal, and cooling in livestock sheds, factories, mines, tunnels, and buildings. Because livestock sheds, factories, or large buildings house many animals, workers, and equipment, several fans need to be installed on the exterior walls for indoor ventilation to ensure fresh indoor air. Currently, most indoor ventilation fans are cylindrical fans. These fans have a circular shape, a large air inlet, and no air collection duct at the outlet, resulting in low air collection efficiency. Furthermore, the pre-drilled holes for fan installation on exterior walls are generally square, making it difficult to seal the holes and resulting in poor sealing when installing cylindrical fans.

[0003] Based on this, a high-efficiency negative pressure butterfly door axial flow fan was designed. Utility Model Content

[0004] The present invention aims to solve the above problems by providing a high-efficiency negative pressure butterfly door axial flow fan.

[0005] This utility model is achieved through the following technical solution: a high-efficiency negative pressure butterfly door axial flow fan, including a shell, characterized in that the air inlet of the shell adopts an arc-shaped horn design, and a square flange is installed on the outside of the arc-shaped horn. The air outlet of the shell is provided with a diffuser cylinder, and an inclined butterfly door support frame is provided inside the diffuser cylinder. A butterfly door is also provided inside the diffuser cylinder, and the butterfly door is connected to a fixing frame through a hinge structure. The fixing frame is installed on the support frame.

[0006] Furthermore, the hinge structure includes a hinge plate, an L-shaped post, and a return torsion spring, wherein one side of the hinge plate is connected to the butterfly door, and the other side is fitted with an L-shaped post. The tail end of the L-shaped post is fitted into a fixed frame, and the return torsion spring is fitted onto the L-shaped post.

[0007] Furthermore, the fixing frame is also equipped with a limiting baffle to prevent the butterfly door from opening in the opposite direction.

[0008] The beneficial effects of this utility model are as follows: The fan of this utility model adopts a long diffuser design at the air outlet, which effectively converts part of the dynamic pressure into static pressure, thereby improving the overall efficiency of the fan; The fan of this utility model adopts an arc-shaped horn design at the air inlet, which streamlines the airflow, reduces airflow rotation and turbulence, makes the airflow more stable, reduces resistance, and improves the efficiency of the fan; The addition of a square flange design at the air inlet makes it easier to seal the opening and provides a better sealing effect. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Figure 2 This is a front view schematic diagram of the present invention;

[0011] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0012] Figure 4 This is a top view of the present invention;

[0013] Figure 5 for Figure 4 Schematic diagram of the AA section;

[0014] Figure 6 for Figure 5 A magnified view of a portion of the image;

[0015] In the attached diagram, 1 is a square flange, 2 is an arc-shaped flared mouth, 3 is the outer shell, 4 is a butterfly door, 5 is a hinge mechanism, 501 is a hinge plate, 502 is an L-shaped column, 503 is a reset torsion spring, 6 is a fixed frame, 601 is a limit baffle, 7 is a diffuser, and 8 is a support frame. Detailed Implementation

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further explained below in conjunction with the embodiments.

[0017] like Figures 1 to 6 As shown, a high-efficiency negative pressure butterfly door 4 axial flow fan includes a housing 3. The air inlet of the housing 3 is designed with an arc-shaped horn mouth 2. A square flange 1 is installed on the outside of the arc-shaped horn mouth 2. The air outlet of the housing 3 is provided with a long diffuser 7. An inclined butterfly door support frame 8 is provided inside the diffuser 7. A butterfly door 4 is also provided inside the diffuser 7. The butterfly door 4 is a gravity self-closing butterfly door. The butterfly door 4 is connected to a fixing frame 6 through a hinge structure. The fixing frame 6 is installed on the support frame 8.

[0018] The hinge structure includes a hinge piece 501, an L-shaped post 502, and a return torsion spring 503. One side of the hinge piece 501 is connected to the butterfly door 4, and the other side is fitted with the L-shaped post 502. The tail end of the L-shaped post 502 is fitted onto the fixing frame 6, and the return torsion spring 503 is fitted onto the L-shaped post 502.

[0019] The fixed frame 6 is also equipped with a limiting baffle 601 to prevent the butterfly door 4 from opening in the opposite direction.

[0020] This utility model adopts a gravity-driven self-closing butterfly door 4 for fans, a long diffuser tube 7 for the air outlet, and an arc-shaped horn mouth 2 for the air inlet, which improves the overall efficiency of the fan.

[0021] The outer shell 3 of this utility model is made of SMC molded fiberglass, which has a smooth and beautiful surface, high strength, corrosion resistance, and good quality.

[0022] This utility model has a simple structure, is easy to install, requires little maintenance, is easy to operate, and does not require professional maintenance personnel.

[0023] The butterfly door 4 of this utility model is parallel to the airflow when it is open, which can minimize wind resistance and the possibility of noise generation, making it more carbon-friendly and environmentally friendly.

[0024] When in use, connect the square flange 1 to the pre-reserved opening in the exterior wall, and the air will flow from the air inlet to the air outlet under the action of the fan.

[0025] Except for the technical features described in the specification, all other technical features are known to those skilled in the art.

Claims

1. A high-efficiency negative pressure butterfly-shaped axial flow fan, comprising a housing (3), characterized in that, The air inlet of the outer shell (3) adopts an arc-shaped horn mouth (2) design. A square flange (1) is provided on the outside of the arc-shaped horn mouth (2). The air outlet of the outer shell (3) is provided with a diffuser cylinder (7). An inclined butterfly door support frame (8) is provided inside the diffuser cylinder (7). A butterfly door (4) is also provided inside the diffuser cylinder (7). The butterfly door (4) is connected to the fixing frame (6) through a hinge structure. The fixing frame (6) is installed on the support frame (8). The hinge structure includes a hinge plate (501), an L-shaped post (502), and a return torsion spring (503). One side of the hinge plate (501) is connected to the butterfly door (4), and the other side is fitted with an L-shaped post (502). The tail end of the L-shaped post (502) is fitted onto the fixing frame (6), and the return torsion spring (503) is fitted onto the L-shaped post (502).

2. The high-efficiency negative pressure butterfly-shaped axial flow fan according to claim 1, characterized in that, The fixing frame (6) is also provided with a limiting baffle (601) to prevent the butterfly door (4) from opening in the opposite direction.

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