A volute-free fan special for gas filtering equipment

Abstract

This utility model discloses a volute-less fan specifically for gas filtration equipment, relating to the field of volute-less fans. The utility model includes a base and a housing. A motor is mounted on the top of the base, and an impeller is connected to the motor's output end. A junction box is mounted on the top of the motor, and the outer surface of the junction box has two connection ports. This utility model incorporates a sliding groove, a sliding block, a spring, an arc-shaped block, a protective pad, and a damping pad. When the cable at the connection port bends, it pushes the arc-shaped block corresponding to the bending direction to move. The arc-shaped block then pushes the sliding block to slide inside the sliding groove. As the sliding block slides, it compresses the spring, causing the spring to compress and generate a reaction force. The arc-shaped block prevents excessive bending of the cable, thus avoiding problems such as insulation damage and internal wire breakage due to excessive bending, thereby improving the cable protection effect. Simultaneously, the protective pad (made of silicone rubber) directly contacts the cable, reducing friction damage.

Description

Technical Field

[0001] This utility model relates to the field of volute-less fans, specifically a volute-less fan for gas filtration equipment. Background Technology

[0002] The volute-less fan for gas filtration equipment is a centrifugal fan used in the field of gas filtration. It eliminates the traditional volute structure, with the impeller directly driving the airflow, and the casing or external structure guiding the flow. Its working principle is as follows: the volute-less fan drives the impeller to rotate via a motor. The impeller gives the gas kinetic energy, and under the action of centrifugal force, the gas is thrown out from the edge of the impeller and then discharged through the fan outlet. Because there is no volute to constrain the gas, the direction of airflow and static pressure increase are guided by external pipes or equipment structures after discharge. It is mainly used in various gas filtration equipment, such as air purifiers, industrial waste gas treatment equipment, laboratory fume hoods, and hospital operating room purification equipment.

[0003] Existing volute-less fans for gas filtration equipment have a junction box on the motor with two connection ports for wiring, allowing the motor to be powered on. However, when the fan is running, the motor vibrates, and this vibration is transmitted to the junction box and the connected cables. Long-term vibration may cause the cables to shift at the connection ports, gradually bending or even repeatedly bending. If the cables are excessively bent, the internal wires will be subjected to significant mechanical stress. Long-term repeated bending at excessive angles may lead to fatigue fracture of the wires, causing power outages to the motor and preventing the fan from working properly. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a volute-less fan for gas filtration equipment to solve the technical problem that fatigue fracture of the internal wires of the cable may occur if the cable at the connection port is excessively bent.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a volute-less fan for gas filtration equipment, comprising a base and a housing. A motor is mounted on the top of the base, and an impeller is connected to the output end of the motor. A junction box is mounted on the top of the motor. The outer surface of the junction box has two wiring ports. The outer surface of the junction box also has multiple sliding grooves, and each of the multiple sliding grooves has a sliding seat inside. The sliding seat and the inside of the sliding grooves are provided with mounting slots, and a spring is installed between every two mounting slots. An arc-shaped block is mounted on the outer surface of the sliding seat, and a protective pad is mounted on the side of the arc-shaped block near the wiring port.

[0006] By adopting the above technical solution, the slide can compress the spring when it slides, so that the spring is compressed and the arc block will be subjected to the reaction force of the spring, thereby preventing the cable from bending excessively.

[0007] Furthermore, both the arc-shaped block and the protective pad are slidably connected to the slide groove via a slide block.

[0008] By adopting the above technical solution, when the cable at the connection port is bent, the arc-shaped block corresponding to the bending direction can be pushed to move, and the arc-shaped block will push the slide block to slide inside the slide groove.

[0009] Furthermore, the protective pad is made of silicone rubber and is arc-shaped.

[0010] By adopting the above technical solution, the protective pad can protect the cable.

[0011] Furthermore, the base is installed inside the housing by multiple bolts, and a top cover is installed on the top of the housing by bolts.

[0012] By adopting the above technical solution, the top cover can cover the top of the box, and the top cover can be removed from the top of the box.

[0013] Furthermore, an air inlet is provided on one side of the box, and an air outlet is provided on the other side of the box.

[0014] By adopting the above technical solution, the air inlet is designed to facilitate air intake, while the air outlet is designed to facilitate air exhaust.

[0015] Furthermore, a damping pad is installed on the inner wall of the slide groove. The damping pad is made of silicone rubber material, and the slide block is in contact with the damping pad.

[0016] By adopting the above technical solution, the damping pad can improve the stability of the slide.

[0017] Furthermore, the motor is equipped with heat dissipation fins.

[0018] By adopting the above technical solution, the heat dissipation fins facilitate heat dissipation for the motor.

[0019] Furthermore, the slide is convex in shape, and the arc-shaped block is made of polyamide material.

[0020] By adopting the above technical solution, the slide block is prevented from falling out of the slide groove, thereby improving the stability of the slide block.

[0021] Furthermore, the spring is made of alloy spring steel (such as 50CrVA or 60Si2MnA).

[0022] By adopting the above technical solutions, alloy spring steel, through the addition of elements such as chromium and vanadium, significantly improves fatigue strength and heat resistance, thereby extending the service life of the spring.

[0023] In summary, the present invention has the following main advantages: This invention incorporates a sliding groove, a sliding block, a spring, an arc-shaped block, a protective pad, and a damping pad. When the cable at the connection point bends, the arc-shaped block corresponding to the bending direction moves, and the arc-shaped block pushes the sliding block to slide inside the sliding groove. As the sliding block slides, it compresses the spring, causing the spring to compress and generate a reaction force. The arc-shaped block prevents the cable from bending excessively, thus avoiding problems such as insulation damage and internal wire breakage caused by excessive bending, thereby improving the protection effect of the cable. At the same time, the protective pad (made of silicone rubber) directly contacts the cable, reducing friction damage, and the damping pad in the sliding groove can enhance the sliding resistance of the sliding block and improve the structural stability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the box body of this utility model; Figure 3 This is a schematic diagram of the overall orthographic structure of this utility model; Figure 4 This is a schematic diagram of the motor structure of this utility model; Figure 5 This is a schematic diagram of the slide structure of this utility model; Figure 6 For the present utility model Figure 2 Enlarged structural diagram at point A; Figure 7 For the present utility model Figure 3 A magnified structural diagram at point B in the middle.

[0025] In the diagram: 1. Base; 2. Motor; 3. Impeller; 4. Junction box; 5. Wiring port; 6. Slide groove; 7. Slide seat; 8. Mounting groove; 9. Spring; 10. Arc block; 11. Protective pad; 12. Housing; 13. Top cover; 14. Air outlet; 15. Air inlet; 16. Damping pad; 17. Heat dissipation fins. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] Example 1:

[0029] A volute-less fan specifically designed for gas filtration equipment, such as Figures 1-7 As shown, the device includes a base 1 and a housing 12. A motor 2 is mounted on the top of the base 1, and an impeller 3 is connected to the output end of the motor 2. A junction box 4 is mounted on the top of the motor 2. The outer surface of the junction box 4 has two wiring ports 5. The outer surface of the junction box 4 also has multiple sliding grooves 6, and each of the multiple sliding grooves 6 has a slide seat 7. The slide seat 7 and the interior of the sliding groove 6 have mounting slots 8, and a spring 9 is installed between every two mounting slots 8. An arc-shaped block 10 is mounted on the outer surface of the slide seat 7, and a protective pad 11 is mounted on the side of the arc-shaped block 10 near the wiring port 5. When the slide seat 7 slides, it can squeeze the spring 9, causing the spring 9 to be compressed. The arc-shaped block 10 will be subjected to the reaction force of the spring 9, thereby preventing the cable from bending excessively. The arc-shaped block 10 is made of polyamide material.

[0030] Specifically, the arc-shaped block 10 and the protective pad 11 are slidably connected to the slide groove 6 via the slide seat 7. When the cable at the connection port 5 bends, the arc-shaped block 10 corresponding to the bending direction can be pushed to move. The arc-shaped block 10 then pushes the slide seat 7 to slide inside the slide groove 6. The protective pad 11 is made of silicone rubber and is arc-shaped. The protective pad 11 can protect the cable. The inner wall of the slide groove 6 is also equipped with a damping pad 16, which is made of silicone rubber. The slide seat 7 fits against the damping pad 16. The damping pad 16 can improve the stability of the slide seat 7. The motor 2 is equipped with heat dissipation fins 17, which can facilitate heat dissipation of the motor 2.

[0031] See Figures 1-3 The base 1 is installed inside the box 12 by multiple bolts. The top cover 13 is installed on the top of the box 12 by bolts. The top cover 13 can cover the top of the box 12 and can be removed from the top of the box 12. An air inlet 15 is provided on one side of the box 12 and an air outlet 14 is provided on the other side of the box 12. The air inlet 15 is designed to facilitate air intake, while the air outlet 14 is designed to facilitate air exhaust.

[0032] Example 2:

[0033] Based on the above embodiment 1, the following method will be adopted to improve the stability of the slide 7.

[0034] Specifically, the slide 7 is convex in shape to prevent it from falling out of the groove 6, thereby improving its stability.

[0035] Example 3:

[0036] Based on the above embodiment 1, in order to improve the service life of spring 9, spring 9 will be made of the following materials.

[0037] See Figures 4-7Spring 9 is made of alloy spring steel (such as 50CrVA or 60Si2MnA). By adding elements such as chromium and vanadium, the fatigue strength and heat resistance of alloy spring steel are significantly improved, thereby extending the service life of spring 9.

[0038] The working principle of this utility model is as follows: First, before use, the staff can install the volute-less fan. After installation, the wiring is connected and the power is turned on, the motor 2 can be started. The motor 2 can drive the impeller 3 to rotate. The rotation of the impeller 3 gives the gas kinetic energy. Under the action of centrifugal force, the gas is thrown out from the edge of the impeller 3 and discharged through the air outlet 14. The external gas enters the housing 12 through the air inlet 15. When the cable at connector 5 is bent, the arc block 10 corresponding to the bending direction can be pushed to move. The arc block 10 then pushes the slide 7 to slide inside the slide groove 6. When the slide 7 slides, it can squeeze the spring 9, causing the spring 9 to be compressed and generate a reaction force. The arc block 10 prevents the cable from bending excessively, thereby avoiding problems such as insulation layer damage and internal wire breakage caused by excessive bending. At the same time, the protective pad 11 (silicone rubber material) directly contacts the cable, reducing friction damage.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A volute-less fan for gas filtration equipment, comprising a base (1) and a housing (12), characterized in that: A motor (2) is installed on the top of the base (1), and an impeller (3) is connected to the output end of the motor (2). A junction box (4) is installed on the top of the motor (2). Two wiring ports (5) are provided on the outer surface of the junction box (4). Multiple sliding grooves (6) are also provided on the outer surface of the junction box (4). A sliding seat (7) is provided inside each of the multiple sliding grooves (6). An installation groove (8) is provided on the sliding seat (7) and inside the sliding groove (6). A spring (9) is installed between every two installation grooves (8). An arc-shaped block (10) is installed on the outer surface of the sliding seat (7). A protective pad (11) is installed on the side of the arc-shaped block (10) near the wiring port (5).

2. The volute-less fan for gas filtration equipment according to claim 1, characterized in that: The arc-shaped block (10) and the protective pad (11) are both slidably connected to the slide groove (6) via the slide seat (7).

3. The volute-less fan for gas filtration equipment according to claim 1, characterized in that: The protective pad (11) is made of silicone rubber material and is arc-shaped.

4. The volute-less fan for gas filtration equipment according to claim 1, characterized in that: The base (1) is installed inside the box (12) by multiple bolts, and the top cover (13) is installed on the top of the box (12) by bolts.

5. A volute-less fan for gas filtration equipment according to claim 1, characterized in that: An air inlet (15) is provided on one side of the box (12), and an air outlet (14) is provided on the other side of the box (12).

6. A volute-less fan for gas filtration equipment according to claim 1, characterized in that: The inner wall of the slide (6) is also equipped with a damping pad (16), which is made of silicone rubber material, and the slide (7) is in contact with the damping pad (16).

7. A volute-less fan for gas filtration equipment according to claim 1, characterized in that: The motor (2) is provided with heat dissipation fins (17).

8. A volute-less fan for gas filtration equipment according to claim 1, characterized in that: The slide (7) is convex in shape, and the arc block (10) is made of polyamide material.

9. A volute-less fan for gas filtration equipment according to claim 1, characterized in that: The spring (9) is made of alloy spring steel.

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