Noise reduction centrifugal fan

Abstract

The utility model discloses a noise reduction centrifugal fan, and relates to the technical field of centrifugal fans, the noise reduction centrifugal fan comprises a footing, a sound insulation structure and a fixing structure, one side of the top end of the footing is provided with a base, the top end of the base is provided with a driving motor, and the output end of the driving motor is provided with a driving rod; a machine shell is installed on the side, away from the base, of the top end of the bottom foot, an air inlet pipe is installed on one side of the machine shell, a connecting block is vertically installed in the air inlet pipe, a dustproof net is arranged on one side of the air inlet pipe, the fixing structures are located at the upper end and the lower end of the air inlet pipe, and an impeller is installed on the outer wall of a driving rod in the machine shell. And an air outlet pipe is mounted at the top end of the front end of the shell. Noise reduction processing can be carried out on the driving motor through the baffle and the sound insulation cotton in the sound insulation shell, noise reduction processing can be carried out on the impeller through the sound insulation cotton in the machine shell, noise reduction of the driving motor of the centrifugal fan is achieved through the structure, and the noise reduction effect is enhanced.

Description

Technical Field

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

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air intake of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household appliances, drying and selection of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] Traditional centrifugal fans have the advantages of high efficiency, energy saving and environmental protection, but they still have their shortcomings.

[0004] When a traditional centrifugal fan is in use, sound insulation material is usually filled inside the casing outside the impeller to insulate the impeller. However, the drive motor of the centrifugal fan is exposed to the outside and also generates a lot of noise. Utility Model Content

[0005] The utility model aims to provide a noise-reducing centrifugal fan to solve the problem of noise generated by a centrifugal fan drive motor mentioned in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a noise-reducing centrifugal fan, comprising a foot, a sound insulation structure and a fixing structure;

[0007] A base is installed on one side of the top of the foot, and a driving motor is installed on the top of the base, a driving rod is installed on the output end of the driving motor, and a housing is installed on the side of the top of the foot away from the base, an air inlet pipe is installed on one side of the housing, a connecting block is vertically installed inside the air inlet pipe, and a dustproof net is arranged on one side of the air inlet pipe, and the fixed structures are located at the upper and lower ends of the air inlet pipe;

[0008] An impeller is installed on the outer wall of the driving rod inside the casing, and an air outlet pipe is installed on the top of the front end of the casing, and the sound insulation structure is located at the top of the outer base of the driving motor;

[0009] The sound insulation structure includes a cavity, which is opened at the front and rear ends of the top of the base, and sliding rods are installed horizontally inside the cavity, the outer walls of the sliding rods are slidably connected with sliders, and the outer walls of the sliding rods on one side of the sliders are sleeved with telescopic springs, a sound insulation shell is installed on the top of the slider, and a baffle is installed on the top of the base on one side of the sound insulation shell, the casing, sound insulation shell and baffle are all double-layered, and the casing, sound insulation shell and baffle are filled with sound insulation cotton.

[0010] Preferably, one end of the driving rod passes through the sound insulation cotton and extends to the inside of the sound insulation cotton, and the driving rod is installed on one side of the connecting block through a rotating shaft.

[0011] Preferably, the top ends of the sliders pass through the base, and the top ends of the sliders extend to above the base.

[0012] Preferably, the telescopic springs are fixedly installed between the slider and the cavity, and the sound insulation shell forms a sliding structure through the slider and the sliding rod.

[0013] Preferably, the fixing structure includes a slot, an insert block, a pull button, a fixing spring, an insert rod and a hole. The slots are opened inside the upper and lower ends of one side of the air inlet duct, and the insert blocks are installed at the upper and lower ends of one side of the dust screen. Holes are opened inside the insert blocks, and the fixing springs are installed at the upper and lower ends of the air inlet duct. A pull button is installed at one end of the fixing spring, and a plug rod is installed at the end of the pull button close to the slot.

[0014] Preferably, the insert blocks are matched with the slots, and the insert blocks are located inside the slots.

[0015] Preferably, one end of the insertion rod passes through the air inlet pipe, and one end of the insertion rod extends to the inside of the insertion hole.

[0016] Compared with the prior art, the beneficial effect of the utility model is as follows: the drive motor is installed on the top of the base, and then the sound insulation shell is loosened. Under the reaction force of the telescopic spring, the slider slides to the right on the outer wall of the slide rod, and the sound insulation shell is driven by the slider to make the sound insulation shell and the baffle close to each other. The drive motor can be noise-reduced by the sound insulation cotton inside the baffle and the sound insulation shell, and the impeller can be noise-reduced by the sound insulation cotton inside the casing. This structure realizes the noise reduction of the centrifugal fan drive motor and enhances the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 3 It is a side view enlarged structural schematic diagram of the connection block of the utility model;

[0020] Figure 4 For the utility model Figure 1 Enlarged structural diagram at A in the middle.

[0021] In the figure: 1. foot; 2. base; 3. casing; 4. sound insulation cotton; 5. dust net; 6. connecting block; 7. air inlet pipe; 8. impeller; 9. fixing structure; 901. slot; 902. plug block; 903. button; 904. fixing spring; 905. plug rod; 906. socket; 10. driving rod; 11. baffle; 12. driving motor; 13. sound insulation shell; 14. cavity; 15. sliding rod; 16. slider; 17. telescopic spring; 18. air outlet pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1: Please refer to Figure 1-4 A base 2 is installed on one side of the top of the base 1, and a driving motor 12 is installed on the top of the base 2, a driving rod 10 is installed on the output end of the driving motor 12, and a housing 3 is installed on the side of the top of the base 1 away from the base 2, an air inlet pipe 7 is installed on one side of the housing 3, a connecting block 6 is vertically installed inside the air inlet pipe 7, and a dustproof net 5 is arranged on one side of the air inlet pipe 7, and the fixing structure 9 is located at the upper and lower ends of the air inlet pipe 7;

[0024] One end of the driving rod 10 passes through the sound insulation cotton 4 and extends to the inside of the sound insulation cotton 4, and the driving rod 10 is installed on one side of the connecting block 6 through the rotating shaft, the outer wall of the driving rod 10 inside the casing 3 is installed with an impeller 8, and the top of the front end of the casing 3 is installed with an air outlet duct 18, and the sound insulation structure is located at the top of the base 2 outside the driving motor 12;

[0025] See also Figure 1-4 A noise reduction centrifugal fan also includes a sound insulation structure, which includes a cavity 14, which is opened at the front and rear ends of the top of the base 2, and a sliding rod 15 is installed horizontally inside the cavity 14, and the outer wall of the sliding rod 15 is slidably connected with a slider 16, and the outer wall of the sliding rod 15 on one side of the slider 16 is sleeved with a telescopic spring 17, a sound insulation shell 13 is installed on the top of the slider 16, and a baffle 11 is installed on the top of the base 2 on one side of the sound insulation shell 13, the casing 3, the sound insulation shell 13 and the baffle 11 are all double-layer designs, and the casing 3, the sound insulation shell 13 and the baffle 11 are filled with sound insulation cotton 4;

[0026] The top ends of the sliders 16 pass through the base 2, and the top ends of the sliders 16 extend to the top of the base 2;

[0027] The telescopic springs 17 are fixedly installed between the slider 16 and the cavity 14, and the sound insulation housing 13 forms a sliding structure through the slider 16 and the slide rod 15;

[0028] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, when using this mechanism, the dust screen 5 is placed on one side of the air inlet pipe 7, the plug block 902 is inserted into the slot 901, the pull button 903 is released, and under the reaction force of the fixing spring 904, the plug rod 905 is inserted into the socket 906 to fix the dust screen 5.

[0029] Embodiment 2: The fixing structure 9 includes a slot 901, an insert block 902, a button 903, a fixing spring 904, an insert rod 905 and a socket 906. The slots 901 are all opened inside the upper and lower ends of one side of the air inlet pipe 7, and the insert blocks 902 are installed at the upper and lower ends of one side of the dust screen 5. The insert blocks 902 are provided with sockets 906 inside, and the fixing springs 904 are installed at the upper and lower ends of the air inlet pipe 7. A button 903 is installed at one end of the fixing spring 904, and a plug rod 905 is installed at one end of the button 903 close to the slot 901;

[0030] The plug blocks 902 are matched with the slots 901, and the plug blocks 902 are located inside the slots 901;

[0031] One end of the plug rod 905 passes through the air inlet pipe 7, and one end of the plug rod 905 extends to the inside of the plug hole 906;

[0032] Specifically, Figure 1 , Figure 3 and Figure 4 As shown, when the mechanism is used, the sound insulation shell 13 is loosened, and the slider 16 slides to the right on the outer wall of the slide rod 15 under the reaction force of the telescopic spring 17. The sound insulation shell 13 is driven by the slider 16, so that the sound insulation shell 13 and the baffle 11 are tightly attached to each other, and the driving motor 12 can be noise-reduced by the baffle 11 and the sound insulation cotton 4 inside the sound insulation shell 13.

[0033] Working principle: the staff pulls out the pull button 903, drives the plug rod 905 through the pull button 903, and pulls the plug rod 905 out from the inside of the slot 901, then places the dust screen 5 on one side of the air inlet pipe 7, inserts the plug block 902 into the inside of the slot 901, releases the pull button 903, and inserts the plug rod 905 into the inside of the socket 906 under the reaction force of the fixing spring 904, fixes the dust screen 5, and the staff starts the driving motor 12, drives the driving rod 10 to rotate through the driving motor 12, and drives the impeller 8 to rotate. At this time, the air can pass through the dust screen 5 for filtration, and then is discharged from the air outlet pipe 18 under the action of the impeller 8;

[0034] The staff pushes the sound insulation shell 13, and drives the slider 16 through the sound insulation shell 13, so that the slider 16 slides to the left on the outer wall of the slide rod 15, and stretches the telescopic spring 17 through the slider 16. At this time, the staff can install the drive motor 12 on the top of the base 2, and then loosen the sound insulation shell 13. Under the reaction force of the telescopic spring 17, the slider 16 slides to the right on the outer wall of the slide rod 15, and drives the sound insulation shell 13 through the slider 16, so that the sound insulation shell 13 and the baffle 11 are tightly attached to each other, and the drive motor 12 can be noise-reduced by the sound insulation cotton 4 inside the baffle 11 and the sound insulation shell 13, and the impeller 8 can be noise-reduced by the sound insulation cotton 4 inside the casing 3.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A noise-reducing centrifugal fan, comprising a foot (1), characterized in that: It also includes a sound insulation structure and a fixing structure (9); A base (2) is installed on one side of the top of the foot (1), and a driving motor (12) is installed on the top of the base (2), a driving rod (10) is installed on the output end of the driving motor (12), and a housing (3) is installed on the side of the top of the foot (1) away from the base (2), an air inlet pipe (7) is installed on one side of the housing (3), a connecting block (6) is vertically installed inside the air inlet pipe (7), and a dustproof net (5) is arranged on one side of the air inlet pipe (7), and the fixing structure (9) is located at the upper and lower ends of the air inlet pipe (7); An impeller (8) is installed on the outer wall of the driving rod (10) inside the casing (3), and an air outlet pipe (18) is installed at the top of the front end of the casing (3), and the sound insulation structure is located at the top of the outer base (2) of the driving motor (12); The sound insulation structure comprises a cavity (14), wherein the cavity (14) is opened at the front and rear ends of the top of the base (2), and a sliding rod (15) is transversely installed inside the cavity (14), and the outer wall of the sliding rod (15) is slidably connected to a slider (16), and the outer wall of the sliding rod (15) on one side of the slider (16) is sleeved with a telescopic spring (17), and a sound insulation shell (13) is installed at the top of the slider (16), and a baffle (11) is installed at the top of the base (2) on one side of the sound insulation shell (13), and the casing (3), the sound insulation shell (13) and the baffle (11) are all double-layer designs, and the casing (3), the sound insulation shell (13) and the baffle (11) are filled with sound insulation cotton (4).

2. A noise-reducing centrifugal fan according to claim 1, characterized in that: One end of the driving rod (10) passes through the sound insulation cotton (4) and extends to the interior of the sound insulation cotton (4), and the driving rod (10) is installed on one side of the connecting block (6) through a rotating shaft.

3. The noise-reducing centrifugal fan according to claim 1, characterized in that: The top ends of the sliders (16) pass through the base (2), and the top ends of the sliders (16) extend to the top of the base (2).

4. The noise-reducing centrifugal fan according to claim 1, characterized in that: The telescopic springs (17) are fixedly installed between the slider (16) and the cavity (14), and the sound insulation shell (13) forms a sliding structure through the slider (16) and the slide rod (15).

5. The noise-reducing centrifugal fan according to claim 1, characterized in that: The fixing structure (9) comprises a slot (901), an insert block (902), a pull button (903), a fixing spring (904), an insert rod (905) and a socket (906); the slots (901) are arranged inside the upper and lower ends of one side of the air inlet pipe (7); the insert blocks (902) are installed at the upper and lower ends of one side of the dust screen (5); the insert blocks (902) are provided with sockets (906) inside, and the fixing springs (904) are installed at the upper and lower ends of the air inlet pipe (7); one end of the fixing spring (904) is installed with a pull button (903), and the end of the pull button (903) close to the slot (901) is installed with an insert rod (905).

6. A noise-reducing centrifugal fan according to claim 5, characterized in that: The insert blocks (902) are matched with the slots (901), and the insert blocks (902) are located inside the slots (901).

7. The noise-reducing centrifugal fan according to claim 5, characterized in that: One end of the insertion rod (905) passes through the air inlet pipe (7), and one end of the insertion rod (905) extends to the inside of the insertion hole (906).

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