Fan noise reduction device

Abstract

The utility model relates to a fan noise reduction device, and aims to solve the problems that the ventilation quantity is influenced and the equipment performance of a workshop is reduced when the rotating speed of a fan is reduced in the prior art; and the technical problems that the cost is increased, the installation is inconvenient, the effective space is occupied, and the use of the fan is influenced due to the arrangement of a guide straight barrel at an inlet / outlet and / or an air outlet are solved. Comprising a noise reduction frame and a plurality of noise reduction grating pieces, the noise reduction frame is of a hollow structure, all the noise reduction grating pieces are arranged in the noise reduction frame in an array mode, a plurality of cavities of the same shape are formed in the noise reduction frame, and sound absorption devices are arranged on the two sides of each noise reduction grating piece.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan noise reduction, and particularly relates to a fan noise reduction device. Background Art

[0002] The main components of an axial flow fan are a motor and blades. The blades are driven to rotate by the output end of the motor. Axial flow fans are usually used for air circulation, long-distance air supply, and cooling and heat dissipation of centralized components, such as greenhouses, livestock houses, and factory buildings.

[0003] Since the fan is affected by its own volute shape, it is easy for the fan to generate a lot of noise when the air is discharged from the air outlet. The fans used in greenhouses, workshops, and livestock houses are generally above 70 decibels, especially the fans used in workshops and livestock houses are even louder. In the prior art, the fan speed is generally reduced to reduce the noise, or a guide cylinder with a constant cross-sectional area is set at the inlet and outlet and / or the air outlet. The guide cylinder uses the duct modal cutoff effect to suppress the circumferential propagation of the fan noise.

[0004] The prior art has at least the following problems:

[0005] 1. Reducing the speed of the fan will affect the ventilation volume and reduce the performance of the workshop equipment.

[0006] 2. Setting a guide tube at the inlet and outlet and / or the air outlet not only increases the cost, but also makes the installation inconvenient and occupies the effective space, thus affecting the use of the fan. Utility Model Content

[0007] The utility model provides a fan noise reduction device, which aims to solve the technical problems existing in the above-mentioned prior art that reducing the rotation speed of the fan will affect the ventilation volume and reduce the equipment performance of the workshop; and setting a guide straight tube at the inlet and / or outlet not only increases the cost, but also is inconvenient to install and occupies effective space, thus affecting the use of the fan.

[0008] The utility model discloses a technical solution to the above-mentioned technical problem as follows: a fan noise reduction device, arranged at the air inlet and outlet of the fan, comprising: a noise reduction frame and a plurality of noise reduction grille pieces, the noise reduction frame being a hollow structure, all of the noise reduction grille pieces are arrayed inside the noise reduction frame, a plurality of cavities of the same shape are formed inside the noise reduction frame, and sound absorbing devices are arranged on both sides of the noise reduction grille pieces.

[0009] The beneficial effects of the utility model are as follows: the utility model reduces noise and provides safety protection for the fan by arranging the noise reduction device at the air inlet and outlet of the fan, and the noise reduction device of the utility model is realized by a noise reduction frame and a noise reduction grille arranged inside the noise reduction frame. Compared with the existing method of installing a guide straight cylinder separately, the space occupied is reduced, and the noise reduction grille arranged in an array can also play a role in noise reduction and sound insulation.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the above-mentioned sound absorbing device includes a sound absorbing groove and a sound absorbing material, and the sound absorbing material is arranged in the sound absorbing groove.

[0012] The beneficial effect of adopting the above further solution is: the utility model increases the use space of the sound-absorbing material by arranging the sound-absorbing device on both sides of the noise reduction grille sheet, so as to achieve better sound absorption effect. By filling the sound-absorbing material in the sound-absorbing groove, the sound-absorbing material can be stably placed in the sound-absorbing groove, and it is convenient to directly replace the sound-absorbing material later.

[0013] Furthermore, the noise reduction frame comprises a fixing part and a noise reduction part, both of which are hollow structures, one side of the noise reduction part is connected to the noise reduction grille, and the other side of the noise reduction part is connected to the fixing part.

[0014] The beneficial effect of adopting the above further solution is that the utility model fixes and shapes all the noise reduction grille pieces through the noise reduction part, and then fixes the shaped noise reduction grille pieces to the air outlet and air inlet of the fan through the fixing part.

[0015] Furthermore, the cross section of the noise reduction portion is "L"-shaped, one end of the cross section is connected to the noise reduction grille sheet, and the other end of the cross section is connected to the fixing portion.

[0016] The beneficial effect of adopting the above further solution is that: since the cross-section of the noise reduction part of the utility model is a square L-shape, and the two ends are respectively connected to the noise reduction grille piece and the fixing part, the fixing part is perpendicular to the plane formed by all the noise reduction grille pieces.

[0017] Furthermore, a noise reduction channel is arranged inside the noise reduction part, and sound absorbing material is arranged inside the noise reduction channel.

[0018] The beneficial effect of adopting the above further solution is that the utility model also provides sound-absorbing material in the noise reduction part, which not only makes the sound absorption effect better, but also has a shock-resistant effect.

[0019] Furthermore, the above-mentioned sound absorbing material is an organic fiber sound absorbing material.

[0020] The beneficial effect of adopting the above further solution is that the utility model uses organic fiber sound-absorbing materials, which have good sound absorption performance in the medium and high frequency ranges and can better absorb the noise of the fan channel.

[0021] Furthermore, the above-mentioned sound absorbing material is an inorganic fiber sound absorbing material.

[0022] The beneficial effect of adopting the above further scheme is that the utility model not only has good sound absorption performance but also has the effects of light weight and non-flammability by using inorganic fiber sound-absorbing material.

[0023] Furthermore, the above-mentioned sound absorbing material is an inorganic foam sound absorbing material.

[0024] The beneficial effect of adopting the above further scheme is that the utility model uses inorganic foam sound-absorbing materials, which are light, non-corrosive, non-flammable, odorless and easy to construct, and the porosity of the inorganic foam sound-absorbing materials can reach more than 85%, making its sound absorption effect better.

[0025] Furthermore, the above-mentioned sound absorbing material is a foam plastic sound absorbing material.

[0026] The beneficial effect of adopting the above further scheme is that the utility model can achieve the effects of light material, sound absorption, heat insulation, flame retardancy, corrosion resistance and shock resistance by using foam plastic sound-absorbing material.

[0027] Furthermore, the material of the noise reduction grille sheet is a flame retardant high-density material.

[0028] The beneficial effect of adopting the above further scheme is: the utility model can make the noise reduction grille have flame retardant and moisture-proof functions by setting the material of the noise reduction grille to a flame retardant high-density material, so that the noise reduction grille can be used for a long time, saving the maintenance cost of the noise reduction grille.

[0029] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a fan noise reduction device provided in one embodiment of the utility model;

[0031] Figure 2 A schematic structural diagram of a noise reduction grille provided in one embodiment of the utility model.

[0032] Figure numerals: 1, noise reduction grille; 2, cavity; 3, noise reduction frame; 301, noise reduction part; 302, fixing part. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] The following specific embodiments are used to describe in detail the technical solution of the utility model and how the technical solution of the utility model solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following embodiments of the utility model will be described in conjunction with the accompanying drawings.

[0035] Embodiment 1:

[0036] The present utility model embodiment provides a possible implementation method, such as Figure 1 and Figure 2 As shown, a structural schematic diagram of a fan noise reduction device is provided, which is arranged at the air inlet and outlet of the fan, including: a noise reduction frame 3 and a plurality of noise reduction grille sheets 1, the noise reduction frame 3 is a hollow structure, all of the noise reduction grille sheets 1 are arranged in an array inside the noise reduction frame 3, and a plurality of cavities 2 of the same shape are formed inside the noise reduction frame 3, and sound absorbing devices are arranged on both sides of the noise reduction grille sheets 1.

[0037] Among them, the utility model reduces noise and provides safety protection for the fan by arranging the noise reduction device at the air inlet and outlet of the fan, and the noise reduction device of the utility model is realized by the noise reduction frame 3 and the noise reduction grille 1 arranged inside the noise reduction frame 3. Compared with the existing method of installing a guide straight cylinder separately, the space occupied is reduced, and the noise reduction grille 1 arranged in an array can also play a role in noise reduction and sound insulation.

[0038] In this embodiment, the cavity 2 formed by the noise reduction grille sheets 1 arranged in an array is square, so that the overall structure of the fan noise reduction device is relatively stable.

[0039] Optionally, the sound absorbing device includes a sound absorbing groove and a sound absorbing material, and the sound absorbing material is arranged in the sound absorbing groove.

[0040] Among them, the utility model increases the use space of the sound-absorbing material by arranging the sound-absorbing device on both sides of the noise reduction grille sheet 1, so as to achieve better sound absorption effect. By filling the sound-absorbing material in the sound-absorbing groove, the sound-absorbing material can be stably placed in the sound-absorbing groove, and it is convenient to directly replace the sound-absorbing material later.

[0041] Optionally, the noise reduction frame 3 includes a fixing part 302 and a noise reduction part 301 , both of which are hollow structures, one side of the noise reduction part 301 is connected to the noise reduction grille sheet 1 , and the other side of the noise reduction part 301 is connected to the fixing part 302 .

[0042] The utility model fixes and shapes all the noise reduction grille pieces 1 through the noise reduction part 301 , and then fixes the shaped noise reduction grille pieces 1 at the air outlet and the air inlet of the fan through the fixing part 302 .

[0043] In this embodiment, holes can be punched on the fixing portion 302, and then bolts and nuts are passed through the holes to fix the fixing portion 302 to the air inlet and air outlet of the fan, thereby fixing the entire noise reduction device.

[0044] Optionally, the cross section of the noise reduction portion 301 is “L”-shaped, one end of the cross section is connected to the noise reduction grille sheet 1 , and the other end of the cross section is connected to the fixing portion 302 .

[0045] In the present invention, the cross section of the noise reduction part 301 is a square L-shape, and the two ends are respectively connected to the noise reduction grille pieces 1 and the fixing part 302 , so the fixing part 302 is perpendicular to the plane formed by all the noise reduction grille pieces 1 .

[0046] Optionally, a noise reduction channel is provided inside the noise reduction portion 301, and sound absorbing material is provided inside the noise reduction channel.

[0047] The utility model also provides sound-absorbing material in the noise reduction part 301, which not only makes the sound-absorbing effect better, but also has a shock-resistant effect.

[0048] Optionally, the sound absorbing material is an organic fiber sound absorbing material.

[0049] Among them, the utility model uses organic fiber sound-absorbing materials, which have good sound absorption performance in the medium and high frequency ranges and can better absorb the noise of the fan channel.

[0050] Optionally, the noise reduction grille sheet 1 is made of a flame-retardant high-density material.

[0051] Among them, the utility model can make the noise reduction grille 1 have flame retardant and moisture-proof functions by setting the material of the noise reduction grille 1 to a flame retardant high-density material, so that the noise reduction grille 1 can be used for a long time, saving the maintenance cost of the noise reduction grille 1.

[0052] Embodiment 2:

[0053] Based on Example 1, optionally, the sound absorbing material is an inorganic fiber sound absorbing material.

[0054] The utility model uses inorganic fiber sound-absorbing materials, which not only have good sound-absorbing properties but also have the effects of being light and non-flammable.

[0055] Embodiment 3:

[0056] Based on Example 1, optionally, the sound absorbing material is an inorganic foam sound absorbing material.

[0057] The utility model uses inorganic foam sound-absorbing materials to achieve the effects of light weight, no corruption, no combustion, no odor and convenient construction. The porosity of the inorganic foam sound-absorbing materials can reach more than 85%, so that the sound absorption effect is better.

[0058] Embodiment 4:

[0059] Based on Example 1, optionally, the sound absorbing material is a foam plastic sound absorbing material.

[0060] The utility model uses foam plastic sound-absorbing material to achieve the effects of light material, sound absorption, heat insulation, flame retardancy, corrosion resistance and shock resistance.

[0061] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the utility model is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the utility model (but not limited to) by each other to form a technical solution.

Claims

1. A fan noise reduction device, characterized in that: It is arranged at the air inlet and outlet of the fan, including: a noise reduction frame and a plurality of noise reduction grille sheets, the noise reduction frame is a hollow structure, all of the noise reduction grille sheets are arranged in an array inside the noise reduction frame, and a plurality of cavities of the same shape are formed inside the noise reduction frame, and sound absorbing devices are arranged on both sides of the noise reduction grille sheets.

2. A fan noise reduction device according to claim 1, characterized in that: The sound absorbing device comprises a sound absorbing groove and a sound absorbing material, and the sound absorbing material is arranged in the sound absorbing groove.

3. A fan noise reduction device according to claim 2, characterized in that: The noise reduction frame comprises a fixing part and a noise reduction part, both of which are hollow structures, one side of the noise reduction part is connected to the noise reduction grille sheet, and the other side of the noise reduction part is connected to the fixing part.

4. A fan noise reduction device according to claim 3, characterized in that: The cross section of the noise reduction portion is "L"-shaped, one end of the cross section is connected to the noise reduction grille sheet, and the other end of the cross section is connected to the fixing portion.

5. A fan noise reduction device according to claim 3, characterized in that: A noise reduction channel is arranged inside the noise reduction part, and sound absorbing material is arranged inside the noise reduction channel.

6. A fan noise reduction device according to claim 2 or 5, characterized in that: The sound absorbing material is an organic fiber sound absorbing material.

7. A fan noise reduction device according to claim 2 or 5, characterized in that: The sound absorbing material is an inorganic fiber sound absorbing material.

8. A fan noise reduction device according to claim 2 or 5, characterized in that: The sound absorbing material is an inorganic foam sound absorbing material.

9. A fan noise reduction device according to claim 2 or 5, characterized in that: The sound absorbing material is a foam plastic sound absorbing material.

10. A fan noise reduction device according to claim 1, characterized in that: The material of the noise reduction grid sheet is a flame retardant high-density material.

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