Sound absorption and noise reduction device of fan

Abstract

The utility model relates to a fan sound absorption and noise reduction device, and aims to solve the technical problems that in the prior art, an air collector needs to pass through a pipeline, a fan, an air opening and other components in the air suction process, and noise is generated when air flows; the technical problems that when a draught fan runs, a motor vibrates, a draught fan shell is driven to vibrate, and the part, connected with an air collector, of the shell generates noise due to vibration are solved, the draught fan comprises the shell and the air collector located in the shell, the air collector is located in the center of the shell, and a sound absorption device is arranged between the shell and the air collector. And the shell is fixedly connected with an air inlet of the fan through a fixing device.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan noise reduction, and particularly relates to a fan sound absorption and 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] In the prior art, fans are installed in places with high heat generation or poor ventilation conditions such as greenhouses, livestock houses and factories. However, the fans lack a uniform air inlet field, so an air collector is generally installed at the air inlet of the axial flow fan. The air collector has an arc shape, a cone shape, etc., and is in an axially convergent form. It is a device that ensures that the airflow evenly fills the inlet of the impeller and minimizes the flow loss of the inlet airflow.

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

[0005] 1. The air collector needs to pass through pipes, fans, air vents and other components during the air suction process, and the air will generate noise when it flows.

[0006] 2. As the fan motor vibrates when it is running, the fan casing will vibrate, and the casing connected to the wind collector will make noise due to the vibration. Utility Model Content

[0007] The utility model provides a fan sound absorption and noise reduction device, which aims to solve the technical problems existing in the above-mentioned prior art that the air collector needs to pass through pipes, fans, air outlets and other components during the air suction process, and the air will generate noise when it flows; and because the motor of the fan will vibrate when the fan is running, the fan casing will vibrate, and the casing at the connection with the air collector will emit noise due to the vibration.

[0008] The utility model solves the above technical problems with the following technical solutions: A fan sound absorption and noise reduction device, comprising:

[0009] A shell and an air collector located inside the shell, the air collector is located at the center of the shell, a sound absorbing device is arranged between the shell and the air collector, and the shell is fixedly connected to the air inlet of the fan through a fixing device.

[0010] The beneficial effect of the utility model is that the utility model can absorb the noise generated by the air flow during the air collection process by arranging a sound absorbing device between the air collector and the fan housing, which not only ensures that the airflow can enter the fan at a uniform speed through the air collector, but also ensures that the noise is reduced during the airflow entering process.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] 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.

[0013] 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.

[0014] Furthermore, the sound absorbing groove is arranged around the air collector, and the groove width at each location inside the sound absorbing groove is the same.

[0015] The beneficial effect of adopting the above further scheme is: the utility model arranges the sound absorbing groove surrounding the wind collector as an important device for absorbing noise. Since it is arranged around the wind collector, the wind collected by the wind collector from all directions will pass through the sound absorbing groove, so the purpose of absorbing noise can be achieved.

[0016] Furthermore, the center of the above-mentioned air collector is an arc-shaped or conical hollow structure, and the outer edge of the air collector is a square.

[0017] The beneficial effect of adopting the above further scheme is: the utility model can better facilitate the uniform speed delivery of wind into the air inlet by setting the center of the wind collector to be arc-shaped or cone-shaped, and by setting a square outer edge, it is fixedly connected with the square fan casing, making the connection more secure.

[0018] Furthermore, a shock-absorbing and sound-insulating layer is provided between the shell and the air inlet.

[0019] The beneficial effect of adopting the above further scheme is: the utility model avoids the noise generated by the vibration of the fan casing during the operation of the fan by arranging a shock-absorbing and sound-insulating layer. Since the shock-absorbing and sound-insulating layer is arranged between the fan casing and the noise reduction device casing, the vibration generated by the fan casing will be mostly offset by the shock-absorbing and sound-insulating layer, and basically no noise will be generated after being transmitted to the noise reduction device casing.

[0020] Furthermore, the shock-absorbing and sound-insulating layer is provided with shock-absorbing material.

[0021] The beneficial effect of adopting the above further solution is that the shock absorbing material of the utility model can be a lightweight polymer material such as rubber, pearl cotton, foamed polystyrene and foamed polypropylene.

[0022] Furthermore, the above-mentioned sound absorbing material is an inorganic fiber sound absorbing material.

[0023] 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.

[0024] Furthermore, the above-mentioned sound absorbing material is an inorganic foam sound absorbing material.

[0025] 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.

[0026] Furthermore, the above-mentioned sound absorbing material is a foam plastic sound absorbing material.

[0027] 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.

[0028] Furthermore, the above-mentioned sound absorbing material is an organic fiber sound absorbing material.

[0029] 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.

[0030] 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

[0031] Figure 1 A schematic structural diagram of a fan sound absorption and noise reduction device provided in one embodiment of the utility model;

[0032] Figure 2 A schematic structural diagram of a shock-absorbing and sound-insulating layer provided in one embodiment of the utility model.

[0033] Figure numerals: 1. outer shell; 2. air collector; 3. sound absorbing device; 4. air inlet; 5. shock-absorbing and sound-insulating layer. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] Embodiment 1:

[0037] 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 sound absorption and noise reduction device for a fan is provided, and the structure includes: a shell 1 and an air collector 2 located inside the shell 1, the air collector 2 is located at the center of the shell 1, a sound absorption device 3 is arranged between the shell 1 and the air collector 2, and the shell 1 is fixedly connected to the air inlet 4 of the fan through a fixing device.

[0038] The utility model can absorb the noise generated by the air flow during the air suction process of the air collector 2 by providing a sound absorbing device 3 between the connection of the air collector 2 and the fan housing 1. This not only ensures that the airflow can enter the fan at a uniform speed through the air collector 2, but also ensures that the noise during the airflow entry process is reduced.

[0039] Optionally, the sound absorbing device 3 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 3 on both sides of the noise reduction grille sheet, so as to achieve a 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 sound absorbing groove is arranged around the air collector 2, and the groove width at each location inside the sound absorbing groove is the same.

[0042] Among them, the utility model sets a sound-absorbing groove surrounding the wind collector 2 as an important device for absorbing noise. Since it is set around the wind collector 2, the wind from all directions of the wind collector 2 will pass through the sound-absorbing groove, so the purpose of absorbing noise can be achieved.

[0043] Optionally, the center of the wind collector 2 is an arc-shaped or conical hollow structure, and the outer edge of the wind collector 2 is a square.

[0044] Among them, the utility model can better facilitate the uniform delivery of wind into the air inlet 4 by setting the center of the wind collector 2 to be arc-shaped or cone-shaped, and by setting a square outer edge, it is fixedly connected with the square fan casing 1, making the connection more firm.

[0045] In this embodiment, since general fan casings are square, the noise reduction device of the present application can be set according to squares of different specifications. The casing of the noise reduction device is extended with a fixed portion, and the shock-absorbing and sound-insulating layer is arranged on the inner side of the fixed portion. The air inlet of the fan casing is then covered with the fixed portion, and then the fixed portion is fixed to the fan casing with punch bolts to complete the installation of the fan noise reduction device of this embodiment.

[0046] Optionally, a shock-absorbing and sound-insulating layer 5 is provided between the housing 1 and the air inlet 4 .

[0047] Among them, the utility model avoids the noise generated by the vibration of the fan casing 1 during the operation of the fan by setting a shock-absorbing and sound-insulating layer 5. Since the shock-absorbing and sound-insulating layer 5 is arranged between the fan casing 1 and the noise reduction device casing 1, the vibration generated by the fan casing 1 will be mostly offset by the shock-absorbing and sound-insulating layer 5, and basically no noise will be generated after being transmitted to the noise reduction device casing 1.

[0048] Optionally, the shock-absorbing and sound-insulating layer 5 is provided with shock-absorbing material.

[0049] The shock absorbing material of the utility model can be light polymer materials such as rubber, pearl cotton, foamed polystyrene and foamed polypropylene.

[0050] Optionally, the sound absorbing material is an organic fiber sound absorbing material.

[0051] 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.

[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 sound absorption and noise reduction device, characterized in that: include: A shell and an air collector located inside the shell, the air collector is located at the center of the shell, a sound absorbing device is provided between the shell and the air collector, and the shell is fixedly connected to the air inlet of the fan through a fixing device; Wherein, the sound absorbing device comprises a sound absorbing groove and a sound absorbing material, wherein the sound absorbing material is arranged in the sound absorbing groove; the sound absorbing groove is arranged around the air collector, and the groove width of each part inside the sound absorbing groove is the same; A shock-absorbing and sound-insulating layer is arranged between the shell and the air inlet.

2. A fan sound absorption and noise reduction device according to claim 1, characterized in that: The center of the wind collector is an arc-shaped or conical hollow structure, and the outer edge of the wind collector is a square.

3. A fan sound absorption and noise reduction device according to claim 1, characterized in that: The shock-absorbing and sound-insulating layer is provided with shock-absorbing material.

4. A fan sound absorption and noise reduction device according to claim 1, characterized in that: The sound absorbing material is an inorganic fiber sound absorbing material.

5. The fan sound absorption and noise reduction device according to claim 1, characterized in that: The sound absorbing material is an inorganic foam sound absorbing material.

6. A fan sound absorption and noise reduction device according to claim 1, characterized in that: The sound absorbing material is a foam plastic sound absorbing material.

7. The fan sound absorption and noise reduction device according to claim 1, characterized in that: The sound absorbing material is an organic fiber sound absorbing material.

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