Ventilation device

Abstract

The utility model discloses a ventilation device. According to the ventilation device, an axial flow fan is arranged in a fan frame; a plurality of silencing modules are arranged on the rear side of the fan, a rainproof grid is arranged at an air outlet of a fan frame, a plurality of grid plates are obliquely arranged on the rainproof grid, a flow guide groove is formed in the side portion of the rainproof grid, and a drainage hole is formed in the bottom of the rainproof grid. And rainwater erosion is avoided. According to the ventilation device, the noise reduction module is transversely or vertically inserted in the fan frame, at least one of the four faces, located in the fan frame, of the noise reduction module is provided with the micropore plate, the other face is wrapped with the sealing plate, the noise reduction module is filled with the noise reduction cotton, the noise reduction module is arranged in a windward mode, and the noise reduction effect is good. And noise in the airflow is eliminated through the silencing cotton.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation equipment, in particular to a ventilation device. Background Art

[0002] In confined spaces such as factories, buildings, and bungalows, it is usually necessary to install exhaust devices. Generally speaking, in areas where people gather, such exhaust devices do not require high wind pressure and air volume, but usually need to have a silent function.

[0003] There are no silent exhaust fans specifically designed for use in such areas where people gather in the prior art. Generally, all such ventilation places are uniformly equipped with industrial exhaust equipment. Silence is achieved by setting a silent interlayer on the exhaust equipment and filling the silent interlayer with silent cotton. However, this method can only control the transmission of wind noise on the side walls of the ventilation device to a certain extent, and cannot control the noise propagation in the direction of airflow.

[0004] In response to the above technical drawbacks, as a research and development design unit in the field of fans, the technical problem that needs to be solved urgently is: to design a ventilation device that can reduce the noise of airflow during ventilation and achieve additional functions such as rain protection while reducing noise. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a ventilation device, which can reduce the noise of the airflow in the flow direction of the airflow by setting a noise reduction structure, and at the same time can achieve better waterproof function. Even when installed on an outdoor wall, the normal operation of the equipment will not be affected by rainwater splashing inside.

[0006] In order to achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: a ventilation device, which includes a fan frame, and an axial flow fan is arranged inside the fan frame; a plurality of silencer modules are arranged on the rear side of the axial flow fan, and a rainproof grille is arranged at the air outlet of the fan frame, a plurality of grille plates are obliquely arranged on the rainproof grille, a guide groove is arranged on the side of the rainproof grille, and a drainage hole is arranged at the bottom of the rainproof grille; a silencer module is inserted horizontally or vertically in the fan frame, and the silencer module is a rectangular parallelepiped, and a microporous plate is arranged on at least one of the four surfaces located inside the fan frame, and a sealing plate is covered on the other surfaces, and the interior of the silencer module is filled with silencer cotton.

[0007] The silencer modules are tilted and airflow gaps are provided between the silencer modules. A rectangular side surface is provided facing the air inlet and outlet ends of the airflow, and the rectangular side surface is a microporous plate.

[0008] The silencer module is filled with silencer cotton and is provided with a plurality of cavities, which can increase the collision area of ​​the sound waves and improve the silencer effect.

[0009] The fan frame is a double-layer structure, which includes an outer plate and an inner plate. A pressure equalizing cavity is provided on the inner plate, and a pressure equalizing ring is provided in the pressure equalizing cavity. The cross-section of the pressure equalizing cavity is larger than the cross-section of the pressure equalizing ring; a plurality of pressure relief holes are provided on the rear side surface of the pressure equalizing ring, and a plurality of return air holes are provided on the inner wall of the pressure equalizing ring. The air flow flows in the pressure equalizing cavity, the air inlet hole and the return air hole to achieve pressure equalization after air pressure reflux.

[0010] On the fan frame, thermal insulation cotton is filled between the outer layer plate and the inner layer plate.

[0011] The beneficial effects of the present invention are as follows: an axial flow fan is arranged inside the fan frame; a plurality of silencer modules are arranged on the rear side of the fan, a rainproof grille is arranged at the air outlet of the fan frame, a plurality of grille plates are obliquely arranged on the rainproof grille, a guide groove is arranged on the side of the rainproof grille, and a drainage hole is arranged at the bottom of the rainproof grille. Through the above structural arrangement, waterproof and drainage of the ventilation device can be achieved after installation to avoid rainwater erosion.

[0012] The utility model has a silencer module inserted horizontally or vertically in the fan frame, the silencer module is located on at least one of the four surfaces inside the fan frame and is provided with a microporous plate, and the other surfaces are covered with a sealing plate, and the inside of the silencer module is filled with silencer cotton. This silencer module is arranged to face the wind and eliminates noise in the airflow through the silencer cotton. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a side view of the internal structure of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-section structure in the middle A direction;

[0016] Figure 3 for Figure 1 Schematic diagram of the middle C direction;

[0017] Figure 4 This is a schematic diagram of the main structure of the rain grille;

[0018] Figure 5 for Figure 4 Schematic diagram of the middle B direction;

[0019] Figure 6 This is a schematic diagram of the main structure of the silencer module;

[0020] Figure 7 Schematic diagram of the internal filler structure;

[0021] Figure 8 This is a schematic diagram of the main structure of the pressure equalizing ring;

[0022] Figure 9 Schematic diagram of the three-dimensional structure of the pressure equalizing ring;

[0023] Figure 10 Schematic diagram of the working principle of the pressure equalizing ring;

[0024] In the figure: 1. Fan frame, 11. Outer plate, 12. Inner plate, 13. Filler, 14. Pressure equalizing chamber, 2. Axial fan, 3. Pressure equalizing ring, 31. Rear side, 32. Return air hole, 33. Pressure relief hole, 34. Inner diameter surface, 4. Silencer module, 40. Air flow gap, 41. Sealing plate, 42. Microporous plate, 43. Silencer filler, 44. Cavity, 5. Rainproof grille, 51. Guide groove, 52. Grille plate, 53. Drain groove, 54. Drain hole. DETAILED DESCRIPTION

[0025] The present invention is further described below through implementation methods. Those skilled in the art may refer to the embodiments for implementation, and may also make technical improvements and innovations based on the existing technical solutions.

[0026] As shown in the accompanying drawings, a ventilation device includes a fan frame 1. The fan frame 1 can be square, circular, or polygonal. As a conventional design, the fan frame 1 is typically a double-layer structure comprising an outer plate 11 and an inner plate 12. A filler 13 is filled between the two layers to provide a shockproof, heat-insulating, and noise-reducing interlayer. This filler is preferably thermal insulation cotton. An axial flow fan 2 is disposed within the fan frame 1 and is suspended and secured using tie rods.

[0027] The rear side of the axial flow fan 2 is provided with a plurality of silencer modules 4, such as Figure 1 、 2 As shown in Figures 6 and 7, a silencer module 4 is inserted horizontally or vertically in the fan frame 1. In this embodiment, the silencer module 4 is inserted horizontally and passes through the inner plate 12, and is riveted to the outer plate 11 on the outside to provide peripheral protection and blocking.

[0028] The silencer module 4 is arranged at an angle, and airflow gaps 40 are provided between the multiple silencer modules 4. When installed at an angle, the contact area between the silencer module 4 and the airflow can be increased to the maximum; the silencer module 4 is arranged as a rectangular parallelepiped, and a microporous plate 42 is provided on at least one of the four surfaces inside the fan frame 1, and a sealing plate 41 is provided on the other surface. The silencer module 4 is filled with silencer cotton as a silencer filler 43.

[0029] In further installation, the muffler module 4 is provided with rectangular side faces towards the air inlet and outlet ends, and the rectangular side faces are microporous plates 42. This structure can absorb sound waves into the muffler module 4 for muffler processing with the largest area.

[0030] The muffler module 4 is filled with muffler foam, which is provided with a number of cavities 44. These cavities 44 can be irregularly shaped, increasing the impact area of ​​sound waves and improving the muffler effect. Field verification has shown that only about 70% of the muffler material 43 is filled, leaving the remaining 30% as cavities 44. The internal muffler module is arranged at a 15-20% inclination with the horizontal airflow direction, which disrupts the airflow and reduces noise transmission.

[0031] A rainproof grille 5 is provided at the air outlet of the fan frame 1, and a plurality of grille plates 52 are obliquely arranged on the rainproof grille 5. Figure 4 、 5 As shown, the rainproof grille 5 is tilted to the left, and the sides of several grille plates 52 are provided with guide grooves 51. Such guide grooves 51 are obtained by cutting U-shaped steel plates. Several grille plates 52 are inserted into the guide grooves 51 on the left and right sides. Because the grille plates 52 are tilted, when in use, the rainproof grille 5 is set on the outer wall. When rainwater invades the rainproof grille 5, the tilted grille plates 52 can divert the rainwater obliquely downward to the guide groove 51 on the left. A drainage groove 53 is provided at the bottom of the rainproof grille 5, and a drainage hole 54 is provided on the drainage groove 53. The collected rainwater is collected and discharged through the drainage hole 54.

[0032] Through the above structural setting, the device is waterproofed on the outer layer through the rainproof grille 5, and is blocked on the airflow path by the inclined silencer module 4, which absorbs sound waves and reduces noise when the airflow is moving.

[0033] The improvements of the present invention also lie in:

[0034] like Figure 9 As shown, a pressure equalizing cavity 14 is provided on the inner plate 11, and a pressure equalizing ring 3 is provided in the pressure equalizing cavity 14. The cross section of the pressure equalizing cavity 14 is larger than that of the pressure equalizing ring. This structure can retain a larger gas flow space.

[0035] like Figure 8 、 9 As shown, the pressure-equalizing ring 3 is arranged in an annular cavity structure, and a plurality of pressure relief holes 33 are arranged on the rear side surface 31 of the pressure-equalizing ring 3, and a plurality of return air holes 32 are arranged on the inner wall of the pressure-equalizing ring 3, that is, the inner diameter surface 34. The return air holes 32 are preferably arranged in a spiral shape, and the spiral direction is the same as the rotation direction of the spiral blades of the axial flow fan 2.

[0036] like Figure 10As shown, the purpose of setting the pressure equalizing ring 3 disclosed above is: the pressure relief hole 33 is set correspondingly on the side where the airflow comes from. When there is a foreign object blocking one side of the rain grille 5 or the electric actuator fails, the shutter cannot be opened normally. The airflow can enter the interior of the pressure equalizing ring 3 through the return air hole 32, and then return part of it through the pressure relief hole 33, reducing the "air holding pressure" and protecting the fan components. The area of ​​the pressure relief hole 33 accounts for about 15-20% of the area of ​​the rear side of the ring, which can ensure the pressure relief amount.

[0037] To sum up, the utility model has a simple structure and is easy to install and produce. After verification by actual samples, its noise reduction effect is obvious. At the same time, it can realize self-protection after equipment failure and avoid larger production accidents. It is an ideal ventilation device.

Claims

1. A ventilation device, characterized in that: It includes a fan frame, an axial flow fan is arranged inside the fan frame; a plurality of silencer modules are arranged on the rear side of the axial flow fan, a rainproof grille is arranged at the air outlet of the fan frame, a plurality of grille plates are obliquely arranged on the rainproof grille, a guide groove is arranged on the side of the rainproof grille, and a drainage hole is arranged at the bottom of the rainproof grille; a silencer module is inserted horizontally or vertically into the fan frame, the silencer module is arranged in a rectangular parallelepiped, a microporous plate is arranged on at least one of the four surfaces located inside the fan frame, and a sealing plate is covered on the other surfaces, and the silencer module is filled with silencer cotton; The silencer modules are tilted and airflow gaps are provided between the silencer modules. A rectangular side surface is provided facing the air inlet and outlet ends of the airflow, and the rectangular side surface is a microporous plate.

2. A ventilation device according to claim 1, characterized in that: The silencer module is filled with silencer cotton and is provided with a plurality of cavities, which can increase the collision area of ​​the sound waves and improve the silencer effect.

3. A ventilation device according to claim 1, characterized in that: The fan frame is a double-layer structure, which includes an outer plate and an inner plate. A pressure equalizing cavity is provided on the inner plate, and a pressure equalizing ring is provided in the pressure equalizing cavity. The cross-section of the pressure equalizing cavity is larger than the cross-section of the pressure equalizing ring; a plurality of pressure relief holes are provided on the rear side surface of the pressure equalizing ring, and a plurality of return air holes are provided on the inner wall of the pressure equalizing ring.

4. A ventilation device according to claim 1, characterized in that: On the fan frame, thermal insulation cotton is filled between the outer layer plate and the inner layer plate.

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