High-performance centrifugal fan

Abstract

The utility model provides a high-performance centrifugal fan which comprises a shell, an air inlet and an air outlet which are formed in the side face of the shell, and further comprises a noise reduction device which is arranged on the air outlet and used for reducing noise when air passes through the air outlet so as to reduce on-site noise. The noise reduction device comprises a supporting shell and a plurality of communicating holes, wherein the supporting shell is arranged outside the air outlet and has a supporting function, and the communicating holes are formed in the air outlet and communicate with the supporting shell. And the noise reduction layer is arranged between the supporting shell and the air outlet and used for being matched with the communicating holes to reduce noise when air passes through the air outlet so as to reduce on-site noise, noise is reduced when air passes through the air outlet, and the on-site noise is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a high-performance centrifugal fan. Background Art

[0002] The centrifugal fan works by driving the impeller to rotate through the driving motor. The existing technology lacks a limiting mechanism for the impeller assembly. Therefore, after the centrifugal fan has been working for a long time, the impeller assembly may move axially along the transmission shaft, increasing the vibration amplitude of the centrifugal fan, and even friction may occur between the impeller and the casing, affecting the service life of the fan. In addition, in order to avoid dust accumulation inside the fan, a filter is set at the air inlet of the existing fan, but the filter is not easy to install and remove. To this end, we propose a high-performance centrifugal fan.

[0003] A high-performance centrifugal fan disclosed in Chinese patent No. CN202223075512.3 includes a shell, an air inlet, an air outlet and an impeller assembly, wherein the air inlet and the air outlet are arranged on the side of the shell, the impeller assembly is arranged inside the shell, the shell side is connected with a drive assembly, the drive assembly is transmission-connected with a transmission shaft, the transmission shaft is transmission-connected with the impeller assembly, a filter cartridge is movably clamped in the air inlet, a fixed ring plate is connected in the shell, two fixed ring plates are provided and are respectively located on both sides of the impeller assembly, the fixed ring plate is sleeved on the outside of the transmission shaft, the side of the fixed ring plate is connected with a limited push block through an elastic push rod, grooves are provided on the sides of the limited push block close to each other, and balls are movably connected in the grooves.

[0004] Although the above patents can solve the corresponding technical problems, there are still certain defects in the use process:

[0005] The noise generation cannot be reduced when the air passes through the air outlet, and the noise on site is loud. Utility Model Content

[0006] The utility model aims to provide a high-performance centrifugal fan in view of the defects and shortcomings of the prior art.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A high-performance centrifugal fan comprises a housing, an air inlet and an air outlet arranged on the side of the housing, and a noise reduction device arranged on the air outlet for reducing noise generation when air passes through the air outlet to reduce on-site noise;

[0009] The noise reduction device includes a supporting shell arranged outside the air outlet and having a supporting function, a plurality of connecting holes opened on the air outlet and connected to the supporting shell, and a noise reduction layer arranged between the supporting shell and the air outlet and used to cooperate with the plurality of connecting holes to reduce noise generation when air passes through the air outlet so as to reduce on-site noise.

[0010] A further improvement is that the noise reduction layer includes a sound-absorbing layer arranged between the supporting shell and the air outlet, which is used to cooperate with a plurality of connecting holes to alleviate the noise generated when air passes through the air outlet, and a sound-absorbing layer with sound-absorbing properties arranged between the supporting shell and the sound-absorbing layer.

[0011] A further improvement is that the sound-absorbing layer is a polyester fiber sound-absorbing board layer.

[0012] A further improvement is that the sound-absorbing layer is a polyester sound-absorbing cotton layer.

[0013] A further improvement is that the support shell includes a reinforcement layer arranged outside the air outlet for improving the strength of the support shell, and a corrosion-resistant layer arranged on the outer surface of the reinforcement layer for making the outer surface of the support shell have corrosion resistance.

[0014] A further improvement is that the reinforcement layer is a high manganese steel layer.

[0015] A further improvement is that the corrosion-resistant layer is an epoxy asphalt coating.

[0016] After adopting the above technical solution, the beneficial effect of the utility model is: the noise reduction layer cooperates with the plurality of connecting holes to reduce the noise generated when the air passes through the air outlet, thereby greatly reducing the noise on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the air outlet and the noise reduction device in the utility model.

[0020] Explanation of the reference numerals: shell 1, air inlet 2, air outlet 3, supporting shell 4, connecting hole 5, noise reduction layer 6, sound-absorbing layer 7, sound-absorbing layer 8, strengthening layer 9, corrosion-resistant layer 10. DETAILED DESCRIPTION

[0021] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0022] See also Figure 1 to Figure 2 As shown, the technical solution adopted in this specific implementation is:

[0023] A high-performance centrifugal fan comprises a housing 1, an air inlet 2 and an air outlet 3 arranged on the side of the housing 1, and a noise reduction device arranged on the air outlet 3 for reducing noise generation when air passes through the air outlet 3 to reduce on-site noise;

[0024] The noise reduction device includes a supporting shell 4 fixedly arranged outside the air outlet 3, a plurality of connecting holes 5 opened on the air outlet 3 and connected to the supporting shell 4, and a noise reduction layer 6 arranged between the supporting shell 4 and the air outlet 3 for cooperating with the plurality of connecting holes 5 to reduce the noise generated when the air passes through the air outlet 3 to reduce the noise on site. The noise reduction layer 6 includes a sound-absorbing layer 7 arranged between the supporting shell 4 and the air outlet 3 for cooperating with the plurality of connecting holes 5 to alleviate the noise generated when the air passes through the air outlet 3, and a sound-absorbing layer 8 with sound-absorbing performance arranged between the supporting shell 4 and the sound-absorbing layer 7. The thickness of the sound-absorbing layer 8 is greater than that of the sound-absorbing layer 7. The sound-absorbing layer 7 is a polyester fiber sound-absorbing board layer, and the sound-absorbing layer 8 is a polyester sound-absorbing cotton layer. The outer surface or inner surface of the shell 1 and the air inlet 2 can be provided with a sound-absorbing material with sound-absorbing performance, so as to cooperate with the noise reduction device to greatly reduce the noise on site.

[0025] The support shell 4 includes a reinforcement layer 9 fixedly arranged outside the air outlet 3 for improving the strength of the support shell 4, and a corrosion-resistant layer 10 arranged on the outer surface of the reinforcement layer 9 for making the outer surface of the support shell 4 have corrosion resistance. The reinforcement layer 9 is a high manganese steel layer, and the corrosion-resistant layer 10 is an epoxy asphalt coating. The support shell 4 can be assembled from two or more shells, and the two or more shells can be assembled by welding or other forms.

[0026] The working principle of the utility model: the cooperation of the connecting hole 5, the sound-absorbing layer 7 and the sound-absorbing layer 8 reduces the noise generated when the air passes through the air outlet, greatly reducing the noise on site; the strengthening layer 9 is used to increase the strength of the supporting shell 4; the corrosion-resistant layer 10 is used to make the outer surface of the supporting shell 4 have corrosion-resistant properties.

[0027] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A high-performance centrifugal fan, comprising a housing, an air inlet and an air outlet arranged on the side of the housing, characterized in that: Also included is a noise reduction device disposed on the air outlet for reducing noise generation when air passes through the air outlet to reduce noise on site; The noise reduction device includes a supporting shell provided outside the air outlet and having a supporting function, a plurality of communication holes opened on the air outlet and connected to the supporting shell, and a noise reduction layer provided between the supporting shell and the air outlet and used for cooperating with the plurality of communication holes to reduce noise generation when air passes through the air outlet so as to reduce on-site noise; The noise reduction layer includes a sound-absorbing layer disposed between the support shell and the air outlet and used to cooperate with a plurality of communication holes to alleviate the noise generated when air passes through the air outlet, and a sound-absorbing layer with sound-absorbing performance disposed between the support shell and the sound-absorbing layer; The sound-absorbing layer is a polyester fiber sound-absorbing board layer; The sound-absorbing layer is a polyester sound-absorbing cotton layer.

2. A high performance centrifugal fan according to claim 1, characterized in that: The support shell includes a reinforcement layer arranged outside the air outlet for improving the strength of the support shell, and a corrosion-resistant layer arranged on the outer surface of the reinforcement layer for making the outer surface of the support shell have corrosion resistance.

3. A high performance centrifugal fan according to claim 2, characterized in that: The reinforcement layer is a high manganese steel layer.

4. A high performance centrifugal fan according to claim 2, characterized in that: The corrosion-resistant layer is an epoxy asphalt coating.

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