Fan structure for noise reduction and ventilation

Abstract

The fan structure comprises a pipeline body, an air inlet, an air outlet and a ventilation fan structure, a front baffle is arranged on the side, close to the ventilation fan structure, of the middle of the interior of the pipeline body, first sound absorption cotton is arranged on the front side of the front baffle in an adhesive mode, and an air guide opening is formed between the front baffle and the inner wall of the pipeline body. A rear baffle is arranged in the pipeline body and located on the rear side of the front baffle, an air guide through hole is formed in the middle of the rear baffle, a first funnel-shaped air guide plate is arranged on the side, facing the front baffle and the air guide opening, of the rear baffle, and second sound absorption cotton adheres to the outer side of the first funnel-shaped air guide plate. Compared with the prior art, the noise reduction pipeline has the advantages that the front baffle and the rear baffle which are aligned to the air inlet are arranged in the pipeline body, sound-absorbing cotton is arranged in a matched mode, sound wave noise which is directly impacted can be reduced with good quality, and meanwhile other auxiliary sound-absorbing cotton is matched, so that the noise reduction effect is good. And further noise reduction operation can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to a fan structure for noise reduction ventilation. Background Technique

[0002] A ventilator is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Modern ventilators are widely used for ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

[0003] In the use of ventilation of the ventilator, it is often necessary to be set up in cooperation with a pipeline. However, in some buildings or scenarios with high requirements for tightness, the noise of some fans or the noise of the external environment will be conducted through the ventilation pipeline, resulting in relatively high noise of the ventilation fan and the pipeline. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a fan structure for noise reduction ventilation that can reduce external and fan noise in view of the deficiencies mentioned in the above background technique.

[0005] To solve the above technical problem, the technical solution provided by the utility model is: a fan structure for noise reduction ventilation, including a pipeline main body, an air inlet and an air outlet are respectively arranged at the front and back of the pipeline main body, a ventilation fan structure is connected and arranged inside the pipeline main body near the air inlet, a front baffle is connected and arranged in the middle of the pipeline main body on one side close to the ventilation fan structure, a first sound-absorbing cotton is adhered to the front side of the front baffle, a wind guiding opening is arranged between the front baffle and the inner wall of the pipeline main body, and a plurality of support rods are fixedly connected between the front baffle and the inner wall of the pipeline main body;

[0006] A rear baffle is connected and arranged inside the pipeline main body behind the front baffle, a wind guiding through hole is arranged in the middle of the rear baffle, a first funnel-shaped wind guiding plate is arranged on the side of the rear baffle facing the front baffle and the wind guiding opening, and a second sound-absorbing cotton is adhered and connected to the outside of the first funnel-shaped wind guiding plate.

[0007] Further, a third sound-absorbing cotton is adhered and connected to the inner wall of the gap between the ventilation fan structure, the front baffle and the rear baffle of the pipeline main body, which is convenient for auxiliary sound-absorbing operation.

[0008] Further, a sound-absorbing cavity is arranged between the outer wall and the inner wall of the pipeline main body, and a fourth sound-absorbing cotton is placed inside the sound-absorbing cavity, which is convenient for preventing noise from being transmitted through the vibration of the pipe wall.

[0009] Further, a first gas filter element and a second gas filter element are respectively connected inside the air inlet and the air outlet, which is convenient for filtering the gas before and after and preventing foreign objects from entering.

[0010] Furthermore, a second funnel-shaped air guide plate is connected to the rear side of the rear baffle in the pipe body, and a fifth sound-absorbing cotton is connected to the outer side of the second funnel-shaped air guide plate to facilitate the air guiding operation at the rear side.

[0011] The advantage of the noise-reducing ventilation fan structure of the utility model compared with the prior art is that the utility model can achieve better noise reduction of the sound wave noise directly impacted by the front baffle and the rear baffle connected to the air inlet in the pipeline body, in combination with the setting of sound-absorbing cotton, and at the same time, in combination with other auxiliary sound-absorbing cotton, further noise reduction can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a first structural schematic diagram of a fan structure for noise reduction ventilation of the utility model.

[0013] Figure 2 This is a second structural schematic diagram of a fan structure for noise reduction ventilation of the utility model.

[0014] Figure 3 The utility model is a side sectional structural schematic diagram of a fan structure for noise reduction ventilation.

[0015] As shown in the figure: 1. Pipe body; 2. Air inlet; 3. Air outlet; 4. Ventilation fan structure; 5. Front baffle; 6. Support rod; 7. Rear baffle; 8. Air guide hole; 9. First funnel-shaped air guide plate; 10. Air guide opening; 11. First sound-absorbing cotton; 12. Second sound-absorbing cotton; 13. Third sound-absorbing cotton; 14. Sound-absorbing cavity; 15. Fourth sound-absorbing cotton; 16. First gas filter; 17. Second gas filter; 18. Second funnel-shaped air guide plate; 19. Fifth sound-absorbing cotton. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0017] Combined with Figures 1-3, A fan structure for noise reduction and ventilation, including a duct main body 1. An air inlet 2 and an air outlet 3 are respectively provided at the front and rear of the duct main body 1. A first gas filter element 16 and a second gas filter element 17 are respectively connected inside the air inlet 2 and the air outlet 3. A ventilation fan structure 4 is connected inside the duct main body 1 near the air inlet 2. The ventilation fan structure 4 is a conventional ventilation fan structure, which drives a fan to perform air extraction and ventilation operations. The first gas filter element 16 and the second gas filter element 17 can prevent foreign objects from entering. A front baffle 5 is connected to the middle of the inner part of the duct main body 1 on one side near the ventilation fan structure 4. A first sound-absorbing cotton 11 is adhered to the front side of the front baffle 5. A wind guiding opening 10 is provided between the front baffle 5 and the inner wall of the duct main body 1. A plurality of support rods 6 are fixedly connected between the front baffle 5 and the inner wall of the duct main body 1. That is, external noise, wind noise and the sound of the fan will directly impact on the front baffle 5, and at the same time, cooperate with the first sound-absorbing cotton 11 to perform preliminary sound absorption operations. The gas will be guided backward through the wind guiding opening 10 by means of diversion.

[0018] Combined with the attached Figure 3 , A rear baffle 7 is connected to the inner part of the duct main body 1 behind the front baffle 5. A wind guiding through hole 8 is provided in the middle of the rear baffle 7. A first funnel-shaped wind guiding plate 9 is provided on the side of the rear baffle 7 facing the front baffle 5 and the wind guiding opening 10. A second sound-absorbing cotton 12 is adhered and connected to the outside of the first funnel-shaped wind guiding plate 9. The gas introduced through the wind guiding opening 10 provided on the front side will be guided by the first funnel-shaped wind guiding plate 9. Cooperating with the second sound-absorbing cotton 12, further sound absorption and noise reduction operations can be carried out during the diversion process. A second funnel-shaped wind guiding plate 18 is connected to the inner part of the duct main body 1 behind the rear baffle 7. A fifth sound-absorbing cotton 19 is connected to the outside of the second funnel-shaped wind guiding plate 18. Through the second funnel-shaped wind guiding plate 18, the concentrated diversion at the front side can be smoothly guided backward, and cooperating with the fifth sound-absorbing cotton 19, auxiliary sound absorption and noise reduction operations can be carried out.

[0019] Combined with the attached Figure 3 , A third sound-absorbing cotton 13 is adhered and connected to the inner wall of the gap between the ventilation fan structure 4, the front baffle 5 and the rear baffle in the duct main body 1. Through the third sound-absorbing cotton 13, inner wall type auxiliary sound absorption and noise reduction operations can be carried out. An acoustic cavity 14 is provided between the outer wall and the inner wall of the duct main body 1. A fourth sound-absorbing cotton 15 is placed inside the acoustic cavity 14. Through the acoustic cavity 14 cooperating with the fourth sound-absorbing cotton 15, the sound guiding operation of noise through the wall of the duct main body 1 can be reduced.

[0020] The above description of the present utility model and its implementation manners is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural manners and embodiments similar to the technical solution without departing from the gist of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A fan structure for noise reduction ventilation, comprising a duct body (1), wherein the duct body (1) is provided with an air inlet (2) and an air outlet (3) at the front and rear, respectively, and characterized in that: A ventilation fan structure (4) is connected to the inside of the duct body (1) near the air inlet (2); a front baffle (5) is connected to the middle of the duct body (1) near the ventilation fan structure (4); a first sound-absorbing cotton (11) is adhered to the front side of the front baffle (5); an air guide opening (10) is provided between the front baffle (5) and the inner wall of the duct body (1); and a plurality of support rods (6) are fixedly connected between the front baffle (5) and the inner wall of the duct body (1); A rear baffle (7) is connected to the rear side of the front baffle (5) in the duct body (1), an air guide hole (8) is provided in the middle of the rear baffle (7), a first funnel-shaped air guide plate (9) is provided on the side of the rear baffle (7) facing the front baffle (5) and the air guide opening (10), and a second sound-absorbing cotton (12) is adhesively connected to the outer side of the first funnel-shaped air guide plate (9).

2. A noise reduction ventilation fan structure according to claim 1, characterized in that: The duct body (1) is provided with a third sound-absorbing cotton (13) adhesively connected to the inner wall of the gap between the ventilation fan structure (4), the front baffle (5) and the rear baffle.

3. The noise reduction ventilation fan structure according to claim 1, characterized in that: A sound-absorbing cavity (14) is provided between the outer wall and the inner wall of the pipe body (1), and a fourth sound-absorbing cotton (15) is placed inside the sound-absorbing cavity (14).

4. The noise reduction ventilation fan structure according to claim 1, characterized in that: The air inlet (2) and the air outlet (3) are respectively connected to a first gas filter (16) and a second gas filter (17).

5. The noise reduction ventilation fan structure according to claim 1, characterized in that: A second funnel-shaped air guide plate (18) is connected to the rear side of the rear baffle (7) in the duct body (1), and a fifth sound-absorbing cotton (19) is connected to the outer side of the second funnel-shaped air guide plate (18).

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