Ventilation fan with adjustable power

Abstract

The utility model discloses a ventilation fan capable of adjusting power, which relates to the technical field of ventilation fans and comprises a fan bearing body, a fan main body is arranged in the fan bearing body, a built-in frequency conversion module is arranged in the fan main body, two L-shaped grooves are arranged on the fan bearing body, and the two L-shaped grooves are connected with the fan main body. L-shaped limiting blocks are installed in two L-shaped grooves formed in the fan bearing body in a sliding mode, an air guide pipe is fixedly installed between the two L-shaped limiting blocks, a second dustproof net is arranged on the air guide pipe, and an L-shaped support is hinged to the air guide pipe. And in combination with the threaded connection mode of the second dustproof net and the fan bearing body, the air guide pipe and the second dustproof net can be integrally and rapidly disassembled, tools are not needed during cleaning and maintenance, the operation time is shortened by more than 80% compared with a traditional bolt fixing mode, and the maintenance convenience of equipment is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation fan technology, and in particular to a ventilation fan with adjustable power. Background Technology

[0002] Ventilation fans are generally composed of fan blades and a motor. They ventilate the room by circulating air, thereby achieving cooling and ventilation. They are important ventilation and air circulation equipment in factories, workshops, or farms.

[0003] In existing technologies, the dust filters of traditional ventilation fans are mostly fixed with bolts or clips, which makes the disassembly and cleaning process cumbersome. In addition, the dust filter structures of the air inlet and outlet are designed independently, which increases the complexity of maintenance and makes it difficult to meet the needs of industrial production and daily use for high efficiency, energy saving and convenient maintenance. Utility Model Content

[0004] Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an adjustable power ventilation fan, which solves the technical problems of traditional ventilation fans where dust filters are mostly fixed with bolts or clips, making disassembly and cleaning cumbersome. Furthermore, the dustproof structures of the air inlet and outlet are designed independently, increasing maintenance complexity and making it difficult to meet the technical needs of high efficiency, energy saving, and convenient maintenance in industrial production and daily use.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An adjustable power ventilation fan includes a fan carrier, a fan body is provided inside the fan carrier, a built-in frequency converter module is provided inside the fan body, two L-shaped slots are provided on the fan carrier, an L-shaped limiting block is slidably installed in each of the two L-shaped slots, an air guide pipe is fixedly installed between the two L-shaped limiting blocks, a second dustproof net is provided on the air guide pipe, an L-shaped bracket is hinged to the air guide pipe, and a first dustproof net is fixedly installed on the L-shaped bracket.

[0009] Preferably, the first dustproof net is located at the lower end of the fan carrier and is used to prevent dust from entering the air inlet on the fan carrier, while the air guide pipe and the second dustproof net are located at the upper end of the fan carrier and are used to prevent dust from entering the air outlet on the fan carrier.

[0010] Preferably, a locking bolt is threaded through the L-shaped bracket, and the locking bolt is threadedly connected to the fan carrier. An external frequency converter is provided on the fan carrier, and the external frequency converter is connected to the built-in frequency converter module inside the fan body.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In this new invention, the sliding fit structure of the L-shaped groove and the L-shaped limiting block, combined with the threaded connection between the second dustproof net and the fan carrier, allows the air duct and the second dustproof net to be quickly disassembled as a whole. No tools are needed for cleaning and maintenance, and the operation time is reduced by more than 80% compared with the traditional bolt fixing method, which significantly improves the convenience of equipment maintenance.

[0013] In this new type of system, through the coordinated control of an external frequency converter and a built-in frequency converter module, combined with sinusoidal PWM control technology, stepless adjustment of the ventilation fan power within the range of 20% to 100% is achieved, with an airflow adjustment accuracy of ±0.5m. 3 The speed is reduced by more than 30% compared to traditional multi-speed regulation, while also reducing the current surge during motor startup and extending the service life of the equipment. Attached Figure Description

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a structural diagram of the entire utility model;

[0016] Figure 2 This is a structural diagram of the fan carrier of this utility model;

[0017] Figure 3 This is a structural diagram of the air duct of this utility model;

[0018] Figure 4 This is a structural diagram of the L-shaped limiting block of this utility model.

[0019] Legend: 11. Air duct; 12. L-shaped limit block; 13. L-shaped bracket; 14. First dustproof net; 15. Second dustproof net; 16. Locking bolt; 21. Fan carrier; 22. Fan body; 23. External frequency converter; 24. L-shaped groove. Detailed Implementation

[0020] This application provides an adjustable power ventilation fan, which effectively solves the technical problems in the prior art where the dust screen of traditional ventilation fans is mostly fixed with bolts or clips, making the disassembly and cleaning process cumbersome, and the dustproof structures of the air inlet and outlet are designed independently, increasing the complexity of maintenance and making it difficult to meet the technical needs of high efficiency, energy saving and convenient maintenance in industrial production and daily use.

[0021] Example

[0022] like Figures 1-4 As shown, the technical solution in this application aims to effectively address the technical problems in the prior art, where traditional ventilation fans often use bolts or clips to fix their dust filters, making disassembly and cleaning cumbersome. Furthermore, the dust filters at the air inlet and outlet are designed independently, increasing maintenance complexity and failing to meet the demands for high efficiency, energy saving, and convenient maintenance in industrial production and daily use. The overall approach is as follows:

[0023] To address the problems existing in the prior art, this utility model provides an adjustable power ventilation fan, including a fan carrier 21, a fan body 22 inside the fan carrier 21, and a built-in frequency converter module inside the fan body 22. This module adopts sinusoidal PWM control technology, which can realize smooth adjustment of motor speed, reduce harmonic interference, and improve motor efficiency. Two L-shaped slots 24 are formed on the fan carrier 21, and L-shaped limit blocks 12 are slidably installed in each of the two L-shaped slots 24. The fit between the L-shaped slots 24 and the L-shaped limit blocks 12 adopts a clearance tolerance design, which ensures smooth sliding and effectively prevents radial wobbling. A guide pipe 11 is fixedly installed between the two L-shaped limit blocks 12. A second dustproof net 15 is provided on the guide pipe 11. The second dustproof net 15 is made of stainless steel woven mesh with a mesh diameter of 0.5mm, which can effectively intercept dust particles larger than 50μm. An L-shaped bracket 13 is hinged to the duct 11, and a first dustproof net 14 is fixedly installed on the L-shaped bracket 13. The first dustproof net 14 uses activated carbon composite filter material, achieving a PM2.5 filtration efficiency of over 95%, and can also adsorb odor molecules. The first dustproof net 14 is located at the lower end of the fan carrier 21 and is used to prevent dust from entering the air inlet of the fan carrier 21. The air duct 11 and the second dustproof net 15 are located at the upper end of the fan carrier 21 and are used to prevent dust from entering the air outlet of the fan carrier 21. A locking bolt 16 is threaded through the L-shaped bracket 13. The locking bolt 16 uses an M30×1.5 fine thread and has a self-locking function to prevent loosening due to vibration. The L-shaped bracket 13 is threadedly connected to the fan carrier 21 by the locking bolt 16. An external frequency converter 23 is installed on the fan carrier 21. The external frequency converter 23 has Modbus RTU and Prof. The ibusDP dual communication interface supports remote monitoring and cluster control. The external frequency converter 23 is connected to the built-in frequency converter module inside the fan body 22. Through this connection, the speed control accuracy of ±0.5% can be achieved, and the energy-saving effect is more than 30% higher than that of traditional fixed frequency fans.

[0024] Working principle:

[0025] Step 1: Power Regulation Process

[0026] The ventilation fan achieves power regulation through the coordinated action of the external frequency converter 23 and the built-in frequency converter module. The specific steps are as follows:

[0027] Parameter input: The user sets the target speed through the panel buttons, knobs or remote signals (such as 4-20mA current signal, Modbus communication) of the external frequency converter 23.

[0028] Signal transmission: The set speed signal is transmitted to the built-in frequency converter module inside the fan body 22.

[0029] Variable frequency control: The built-in variable frequency module adjusts the motor speed of the fan body 22 by changing the frequency and voltage of the power supply, thereby realizing stepless adjustment of the ventilation fan power.

[0030] Step 2: Dust screen cleaning and disassembly process

[0031] When it is necessary to clean the first dust filter 14 and the second dust filter 15, the following steps can be taken to disassemble them: remove the locking bolt 16, rotate the L-shaped bracket 13 to release its threaded connection with the fan carrier 21, continue to rotate and pull the second dust filter 15 outward, causing the L-shaped limiting blocks 12 at both ends of the air guide duct 11 to slide out of the L-shaped groove 24 of the fan carrier 21, thereby achieving the overall disassembly of the air guide duct 11 and the second dust filter 15. Using the hinge structure between the air guide duct 11 and the L-shaped bracket 13, rotate and unfold the L-shaped bracket 13 around the hinge point, remove the first dust filter 14 fixed on the L-shaped bracket 13, and complete the disassembly of the air inlet dust filter. Clean the first dust filter 14 and the second dust filter 15 after disassembly. After cleaning, reassemble them in the reverse order, ensuring that the L-shaped limiting blocks 12 are inserted into the L-shaped groove 24, and then connect and tighten them with the locking bolt 16.

[0032] Through the above structural design, the ventilation fan can achieve flexible power adjustment and easy disassembly and cleaning of the dust filter, which improves the practicality and maintenance convenience of the equipment.

[0033] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An adjustable power ventilation fan, comprising a fan carrier (21), characterized in that: The fan carrier (21) is provided with a fan body (22), and the fan body (22) is provided with a built-in frequency converter module. The fan carrier (21) has two L-shaped grooves (24), and each of the two L-shaped grooves (24) is slidably installed with an L-shaped limiting block (12). An air guide pipe (11) is fixedly installed between the two L-shaped limiting blocks (12), and a second dustproof net (15) is provided on the air guide pipe (11). The air duct (11) is hinged with an L-shaped bracket (13), and a first dustproof net (14) is fixedly installed on the L-shaped bracket (13).

2. The adjustable power ventilation fan according to claim 1, characterized in that: The first dustproof net (14) is located at the lower end of the fan carrier (21) and is used to protect the air inlet on the fan carrier (21) from dust.

3. The adjustable power ventilation fan according to claim 2, characterized in that: The air duct (11) and the second dustproof net (15) are located at the upper end of the fan carrier (21) and are used to prevent dust from the air outlet on the fan carrier (21).

4. The adjustable power ventilation fan according to claim 3, characterized in that: A locking bolt (16) is threaded through the L-shaped bracket (13).

5. The adjustable power ventilation fan according to claim 4, characterized in that: The locking bolt (16) is threaded onto the fan carrier (21).

6. The adjustable power ventilation fan according to claim 5, characterized in that: An external frequency converter (23) is provided on the fan carrier (21); The external frequency converter (23) is connected to the built-in frequency converter module inside the fan body (22).

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