Fan with outlet noise elimination structure

Abstract

The utility model relates to the technical field of fans, in particular to a fan with an outlet silencing structure, which comprises a fan body and a silencing mechanism. According to the draught fan with the outlet noise elimination structure, through the arrangement of the outer shell, the low-carbon micro-perforated plate, the supporting legs, the noise elimination pieces, the non-woven fabric, the sound absorption cotton and the sound absorption plate, when noise generated in the working process of the draught fan body is reduced, the outer shell of the noise elimination mechanism blocks noise diffusion, the low-carbon micro-perforated plate converts sound waves into heat energy through holes, the noise is attenuated, and airflow is rectified; the non-woven fabric filters and disperses airflow and preliminarily absorbs noise, the sound-absorbing cotton efficiently absorbs noise energy, the sound-absorbing plate specifically absorbs and reflects the noise, the outer silencing pieces enhance the silencing effect, the supporting legs provide stable supporting, the bottom of the fan body and the bottom plate are connected with the fixing supporting plates of the body and the auxiliary mechanism, and the reinforcing plates enhance the strength of the fixing supporting plates. The damping shock absorber absorbs vibration and impact force, and the auxiliary mechanism is fixedly connected with the ground through the screw and the nut to ensure stability.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a fan with an outlet noise reduction structure. Background Technology

[0002] A fan is a machine that uses input mechanical energy to increase gas pressure and discharge gas; it is a type of driven fluid machinery. In China, "fan" is a common abbreviation for gas compression and gas transportation machinery. The term "fan" generally includes ventilators, blowers, and wind turbines. Currently, fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling; in boilers and industrial furnaces for ventilation and induced draft; in air conditioning equipment and household appliances for cooling and ventilation; in grain drying and conveying; as a wind source for wind tunnels; and for inflating and propelling hovercraft.

[0003] However, in the existing technology, during the operation of the fan, on the one hand, due to the air flow, and on the other hand, due to the strong vibration generated by the equipment itself, the fan generates a lot of noise and produces a loud sound, which in turn causes environmental pollution.

[0004] Therefore, it is necessary to invent a fan with an outlet noise reduction structure to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a fan with an outlet noise reduction structure, specifically relating to the field of fan technology, to solve the problem mentioned in the background art that the existing fans generate a lot of noise during operation due to the strong vibrations generated by air flow and the operation of the equipment itself.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fan with an outlet silencing structure, comprising a fan body and a silencing mechanism, wherein an auxiliary mechanism is fixedly installed at the bottom of the fan body, and a silencing mechanism is fixedly connected to one end of the fan body;

[0007] The silencing mechanism includes an outer shell. One end of the fan body is fixedly connected to the outer shell. Low-carbon micro-perforated plates are fixedly installed around the inside of the outer shell. Support legs are fixedly connected to the bottom of the outer shell. Sound-absorbing sheets are fixedly installed on both sides of the inside of the outer shell. Non-woven fabric is installed inside the outer shell. Sound-absorbing cotton is fixedly installed on the front side of the non-woven fabric. Sound-absorbing plate is fixedly installed on the front side of the sound-absorbing cotton.

[0008] Preferably, the support legs are provided in four sets and are evenly distributed on the outer shell, and the fan body and the silencing mechanism are fixedly connected by screws.

[0009] Preferably, the material of the non-woven fabric is aramid fiber, and the sound-absorbing sheets are arranged in four groups and are arranged in a rectangular array on the outer shell.

[0010] Preferably, the material of the sound-absorbing cotton is glass fiber, and the material of the sound-absorbing board is rock wool.

[0011] Preferably, the auxiliary mechanism comprises a bottom plate, the bottom plate is fixedly installed at the bottom of the fan body, a fixed support plate is fixedly connected below the bottom plate, reinforcing plates are fixedly installed at the two sides of the fixed support plate, damping shock absorbers are fixedly arranged in the fixed support plate, screw rods are fixedly connected at the two sides of the bottom of the fixed support plate, and nuts are threadedly connected to one end of the screw rods.

[0012] Preferably, the bottom plate is in a semicircular structure, and the reinforcing plates are in a triangular structure.

[0013] Compared with the prior art, the fan with the outlet sound-absorbing structure has the advantages that: the outer shell, the low-carbon micro-perforated plate, the supporting legs, the sound-absorbing sheets, the non-woven fabric, the sound-absorbing cotton, and the sound-absorbing board are arranged, the airflow and airflow noise are generated by the rotation of the impeller in the fan body, and the airflow flows to the sound-absorbing mechanism. The outer shell of the sound-absorbing mechanism blocks the diffusion of noise, the low-carbon micro-perforated plate converts sound waves into heat energy to attenuate noise and straightens the airflow, the non-woven fabric filters and disperses the airflow and preliminarily absorbs noise, the sound-absorbing cotton efficiently absorbs noise energy, the sound-absorbing board absorbs and reflects noise in a targeted manner, the outer sound-absorbing sheets enhance the sound-absorbing effect, the noise is maximally reduced in the propagation process, the bottom plate connects the fixed support plate of the auxiliary mechanism and the main body, the reinforcing plates enhance the strength of the fixed support plate, the damping shock absorbers can absorb the vibration and impact force in the operation process of the fan, the propagation of noise and the abrasion of the equipment are reduced, the service life of the equipment is prolonged, and the stability is ensured by connecting and fixing the auxiliary mechanism and the ground through the screw rods and the nuts. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an external appearance structure schematic view of the fan with the sound-absorbing structure of the utility model;

[0015] Figure 2 It is an auxiliary mechanism structure schematic view of the utility model;

[0016] Figure 3 It is a sound-absorbing mechanism structure schematic view of the utility model;

[0017] Figure 4 It is a fixed support plate and reinforcing plate structure schematic view of the utility model.

[0018] In the figure: 1, fan main body; 2, auxiliary mechanism; 201, bottom plate; 202, fixed support plate; 203, reinforcing plate; 204, damping shock absorber; 205, screw rod; 206, nut; 3, silencing mechanism; 301, outer shell; 302, low-carbon micro-perforated plate; 303, support leg; 304, sound-absorbing sheet; 305, non-woven fabric; 306, sound-absorbing cotton; 307, sound-absorbing board. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a fan with outlet sound-absorbing structure, including fan main body 1 and silencing mechanism 3, the bottom of fan main body 1 is fixedly installed with auxiliary mechanism 2, one end of fan main body 1 is fixedly connected with silencing mechanism 3;

[0021] The sound attenuation mechanism 3 comprises an outer shell 301, one end of the fan body 1 is fixedly connected with the outer shell 301, a low-carbon micro-perforated plate 302 is fixedly installed around the inside of the outer shell 301, support legs 303 are fixedly connected at the bottom of the outer shell 301, sound attenuation sheets 304 are fixedly arranged on both sides of the inside of the outer shell 301, a non-woven fabric 305 is arranged in the outer shell 301, sound-absorbing cotton 306 is fixedly arranged on the front side of the non-woven fabric 305, and a sound-absorbing plate 307 is fixedly installed on the front side of the sound-absorbing cotton 306. When the airflow and noise generated by the fan body 1 enter the sound attenuation mechanism 3, they first contact the outer shell 301, which mainly plays a role in protecting the internal structure and preliminarily blocking part of the noise from spreading outward. Then the airflow and noise encounter the low-carbon micro-perforated plate 302. After the sound wave enters the tiny pores of the low-carbon micro-perforated plate 302, it causes friction between air molecules and the pore wall, converting sound energy into heat energy and achieving the attenuation of part of the noise. At the same time, the low-carbon micro-perforated plate 302 can also have a certain rectifying effect on the airflow, making it pass through the sound attenuation mechanism 3 more smoothly. The non-woven fabric 305 located in front of the low-carbon micro-perforated plate 302 further filters and disperses the airflow. Then the airflow reaches the sound-absorbing cotton 306, which has a large number of tiny fibers and pores inside, causing the noise sound wave to repeatedly reflect and refract therein, causing vibration of air molecules and fibers. Through friction and heat conduction, sound energy is converted into heat energy, effectively absorbing noise energy. Finally, the sound-absorbing plate 307 absorbs and reflects different frequencies of noise. The sound attenuation sheets 304 on the outside of the outer shell 301 can intercept and absorb the noise propagating outward, enhancing the overall sound attenuation effect.

[0022] Further, the support legs 303 are arranged in four groups and are equally spaced on the outer shell 301. The fan body 1 and the sound attenuation mechanism 3 are fixedly connected by screws. Through the arrangement of the fan body 1 and the sound attenuation mechanism 3, the fan body 1 and the sound attenuation mechanism 3 are fixedly connected by screws. This connection method is firm and reliable, can ensure that the two will not loosen or separate during the operation of the fan body 1, and has the advantages of easy installation and easy disassembly, facilitating the maintenance and repair of the equipment in the later period.

[0023] Further, the material of the non-woven fabric 305 is aramid fiber, and the sound attenuation sheets 304 are arranged in four groups. The four groups of sound attenuation sheets 304 are arranged in a rectangular array on the outer shell 301. Through the arrangement of the non-woven fabric 305, the non-woven fabric 305 is made of aramid fiber, which is a high-performance synthetic fiber with high strength, high modulus, high temperature resistance, acid and alkali resistance, etc. In the sound attenuation mechanism 3, the aramid fiber non-woven fabric 305 can provide additional sound absorption and heat insulation effect, which helps to further improve the sound attenuation performance.

[0024] Further, the material of the sound-absorbing cotton 306 is glass fiber, and the material of the sound-absorbing plate 307 is rock wool. The sound-absorbing plate 307 is made of rock wool, which is a mineral cotton made of natural rock as the main raw material and has good sound-absorbing and heat-insulating properties. In the sound-absorbing mechanism 3, the sound-absorbing plate 307 made of rock wool can not only absorb noise but also reduce heat transfer and reduce the influence of heat generated by the operation of the fan body 1 on the surrounding environment.

[0025] Further, the auxiliary mechanism 2 includes a bottom plate 201, and the fan body 1 is fixedly installed at the bottom of the bottom plate 201. The bottom plate 201 is fixedly connected with a fixed support plate 202 below, and the fixed support plate 202 is fixedly installed with reinforcing plates 203 on both sides. The fixed support plate 202 is fixedly provided with damping shock absorbers 204 inside, and the bottom plate 201 is connected with the fixed support plate 202 of the auxiliary mechanism 2 at the bottom of the fan body 1. The weight of the fan body 1 is transmitted to the fixed support plate 202 through the bottom plate 201. The reinforcing plates 203 on both sides of the fixed support plate 202 enhance the structural strength of the fixed support plate 202, so that the fixed support plate 202 can stably support the fan body 1. The damping shock absorbers 204 inside the fixed support plate 202 absorb and reduce the vibration and impact force generated by the fan body 1 when the fan body 1 operates, play a role in shock absorption and noise reduction, and protect the fan body 1 and the surrounding equipment. The screw 205 and the nut 206 on one side of the surface of the fixed support plate 202 can be used to connect and fix the auxiliary mechanism 2 with the ground, to ensure the stability of the fan body 1.

[0026] Further, the bottom plate 201 is a semicircular structure, and the reinforcing plate 203 is a triangular structure. The semicircular structure of the bottom plate 201 is more fitted with the shape of the bottom of the fan body 1, can provide more uniform support force, and can better adapt to the vibration and shaking generated by the operation of the fan body 1 compared with the flat structure, to improve the stability of the fan body 1.

[0027] Working principle: the impeller in the fan main body 1 rotates, accelerates air and produces airflow, and also brings airflow noise, the airflow produced by the fan flows to the sound attenuation mechanism 3, the outer shell body 301 of the sound attenuation mechanism 3 first plays a certain blocking role to the noise, preventing the noise from directly spreading to the outside world, the low-carbon micro-perforated plate 302 in the inside utilizes its small pores to make the entering sound waves cause air molecules to rub against the hole wall in the pores, convert sound energy into heat energy, realize the attenuation of part of the noise, and play a rectifying role to the airflow. The non-woven fabric 305 made of aramid fiber material further filters and disperses the airflow, while preliminarily absorbing and blocking the noise, the sound-absorbing cotton 306 made of glass fiber material makes the noise sound waves repeatedly reflect and refract by virtue of a large number of small fibers and pores inside, converts sound energy into heat energy through the vibration of air molecules and fibers, efficiently absorbs noise energy, the sound-absorbing plate 307 made of rock wool material absorbs and reflects different frequency noises, further reduces noise propagation, the four groups of sound attenuation sheets 304 distributed at equal intervals outside the outer shell body 301 assist in absorbing and reflecting noise, enhance the overall sound attenuation effect, the supporting legs 303 provide stable support for the sound attenuation mechanism 3, and secondly, at the bottom of the fan main body 1, the bottom plate 201 connects the fan main body 1 and the fixed supporting plate 202 of the auxiliary mechanism 2, the weight of the fan main body 1 is transmitted to the fixed supporting plate 202 through the bottom plate 201, the reinforcing plates 203 on both sides of the fixed supporting plate 202 enhance the structural strength of the fixed supporting plate 202, so that it can stably support the fan main body 1, the damping shock absorber 204 in the fixed supporting plate 202 absorbs and reduces the vibration and impact force generated by the fan main body 1 when the fan main body 1 operates, plays a role in shock absorption and noise reduction, protects the fan main body 1 and the surrounding equipment, and the screw rod 205 and the nut 206 on one side of the surface of the fixed supporting plate 202 can be used to connect and fix the auxiliary mechanism 2 with the ground, and ensure the stability of the fan main body 1 when working.

[0028] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fan with an outlet silencing structure, comprising a fan body (1) and a silencing mechanism (3), characterized in that: An auxiliary mechanism (2) is fixedly installed at the bottom of the fan body (1), and a silencing mechanism (3) is fixedly connected to one end of the fan body (1); The silencing mechanism (3) includes an outer shell (301). One end of the fan body (1) is fixedly connected to the outer shell (301). Low-carbon micro-perforated plates (302) are fixedly installed around the inside of the outer shell (301). Support legs (303) are fixedly connected to the bottom of the outer shell (301). Sound-absorbing sheets (304) are fixedly installed on both sides of the inside of the outer shell (301). Non-woven fabric (305) is installed inside the outer shell (301). Sound-absorbing cotton (306) is fixedly installed on the front side of the non-woven fabric (305). Sound-absorbing plate (307) is fixedly installed on the front side of the sound-absorbing cotton (306).

2. A fan with an outlet silencing structure according to claim 1, characterized in that: The support legs (303) are provided in four sets and are distributed at equal intervals on the outer shell (301). The fan body (1) and the silencing mechanism (3) are fixedly connected by screws.

3. A fan with an outlet noise reduction structure according to claim 1, characterized in that: The nonwoven fabric (305) is made of aramid fiber. The sound-absorbing sheet (304) is provided in four sets, and the four sets of sound-absorbing sheets (304) are distributed in a rectangular array on the outer shell (301).

4. A fan with an outlet silencer structure according to claim 1, characterized in that: The sound-absorbing cotton (306) is made of glass fiber, and the sound-absorbing board (307) is made of rock wool.

5. A fan with an outlet noise reduction structure according to claim 1, characterized in that: The auxiliary mechanism (2) includes a base plate (201). The base plate (201) is fixedly installed at the bottom of the fan body (1). A fixed support plate (202) is fixedly connected below the base plate (201). Reinforcing plates (203) are fixedly installed on both sides of the fixed support plate (202). Damping shock absorbers (204) are fixedly installed inside the fixed support plate (202). Screws (205) are fixedly connected to both sides of the bottom of the fixed support plate (202). A nut (206) is threaded to one end of the screw (205).

6. A fan with an outlet noise reduction structure according to claim 5, characterized in that: The base plate (201) has a semi-circular structure, and the reinforcing plate (203) has a triangular structure.

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