A fan system and a ventilator

Abstract

The present invention discloses a fan system and a ventilator. The fan system includes: a housing; a fan body, a first layer of microporous noise reduction structure, and a second layer of microporous noise reduction structure, which are sequentially arranged in the housing at intervals; the fan body has an air inlet, which faces the first layer of microporous noise reduction structure; the perforation rate of the first layer of microporous noise reduction structure is greater than the perforation rate of the second layer of microporous noise reduction structure; along the direction of the air inlet, the distance between the first layer of microporous noise reduction structure and the second layer of microporous noise reduction structure is H1, and the distance between the second layer of microporous noise reduction structure and the housing is H2, where H1 is less than H2. Noise near the air inlet is higher. By configuring the first layer of microporous noise reduction structure and the second layer of microporous noise reduction structure near the air inlet, and by configuring different perforation rates and different spacings, the noise of the fan body is reduced within a wider frequency band.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilators, and in particular to a fan system and a ventilator. Background Art

[0002] A ventilator is a vital medical device that can prevent and treat respiratory failure, reduce complications, and save and prolong patients' lives. A fan inside the ventilator regulates the pressure of delivered gas, thereby improving breathing. The fan generates noise during operation, and the intensity of the noise varies across different frequency bands depending on the fan's operating mode.

[0003] In the existing technology, the noise reduction structure of the fan mainly has a good noise reduction effect in certain frequency bands, but the noise reduction effect in other frequency bands is poor, and it cannot cover a wider frequency band well, so that the fan can achieve a good low-noise effect in all operating modes.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fan system and a ventilator in response to the above-mentioned defects of the prior art, aiming to solve the problem that the noise reduction structure of the fan in the prior art cannot well cover a wider frequency band.

[0006] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0007] A fan system, comprising:

[0008] case;

[0009] The fan body, the first layer of microporous noise reduction structure and the second layer of microporous noise reduction structure are sequentially arranged in the shell at intervals;

[0010] Wherein, the fan body has an air inlet, and the air inlet faces the first layer of microporous noise reduction structure;

[0011] The perforation rate of the first layer of microporous noise reduction structure is greater than the perforation rate of the second layer of microporous noise reduction structure;

[0012] Along the direction of the air inlet, the distance between the first layer of microporous noise reduction structure and the second layer of microporous noise reduction structure is H1, and the distance between the second layer of microporous noise reduction structure and the shell is H2, H1<H2.

[0013] The fan system, wherein the micropores of the first layer of micropore noise reduction structure are first horn holes, and the small ends of the first horn holes face the fan body;

[0014] The micropores of the second-layer micropore noise reduction structure are second speaker holes, and the small ends of the second speaker holes face the first-layer micropore noise reduction structure.

[0015] The fan system, wherein the fan system further comprises:

[0016] A flexible diaphragm surrounds the fan body;

[0017] A hard longitudinal partition plate is located on the side of the fan body;

[0018] The flexible transverse partition and the rigid longitudinal partition divide the shell into a main compartment, a first auxiliary compartment, and a second auxiliary compartment;

[0019] The first layer of microporous noise reduction structure, the second layer of microporous noise reduction structure and the shell form a third auxiliary compartment;

[0020] An inlet and an outlet are formed on the housing, the inlet is connected to the third auxiliary compartment, and the outlet is connected to the second auxiliary compartment;

[0021] The flexible transverse partition is provided with a plurality of first ventilation pipes, and the first ventilation pipes are connected with the main compartment and the first auxiliary compartment;

[0022] The air outlet of the fan body is connected to the second auxiliary compartment;

[0023] The hard longitudinal partition forms at least one second ventilation duct, and the second ventilation duct connects the first auxiliary compartment and the third auxiliary compartment.

[0024] The fan system, wherein a third layer of microporous noise reduction structure and a plurality of third ventilation pipes are provided in the second auxiliary bin, the micropores of the third layer of microporous noise reduction structure are third horn holes, and the third ventilation pipes are located in the middle position of the second auxiliary bin.

[0025] The fan system, wherein a fourth layer of microporous noise reduction structure is provided in the third auxiliary compartment, and the micropores of the fourth layer of microporous noise reduction structure are fourth horn holes.

[0026] The fan system, wherein the housing comprises: a bottom trough, a middle frame and a top cover connected in sequence; the first layer of microporous noise reduction structure comprises:

[0027] The first microporous plate is arranged at the bottom of the middle frame.

[0028] The fan system, wherein a first vertical plate is provided on the first microporous plate; the micropores of the first microporous plate and the second ventilation pipe are respectively located on both sides of the first vertical plate;

[0029] The second layer of microporous noise reduction structure includes:

[0030] A second microplate is located in the bottom tank;

[0031] Wherein, the first vertical plate abuts against the second microporous plate.

[0032] The fan system, wherein a second vertical plate is provided on the second microporous plate, the second vertical plate abuts against the bottom of the bottom trough, and the second vertical plate is located at a corresponding position of the first vertical plate;

[0033] The fourth layer of microporous noise reduction structure includes:

[0034] The fourth microporous plate is arranged on the second vertical plate.

[0035] The fan system, wherein the third layer of microporous noise reduction structure comprises:

[0036] a third vertical plate, disposed on the first microporous plate;

[0037] a third microplate, located in the second auxiliary chamber;

[0038] Wherein, the third microporous plate abuts against the third vertical plate and the hard longitudinal partition.

[0039] A ventilator, comprising: a blower system as described in any one of the above items.

[0040] Beneficial effect: The noise near the air inlet is relatively high. By configuring the first layer of microporous noise reduction structure and the second layer of microporous noise reduction structure near the air inlet, and by configuring different perforation rates and different spacings, the noise of the fan body can be reduced in a wider frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the structure of the fan system in an embodiment of the present invention.

[0042] Figure 2 1 is a top view of the fan system in an embodiment of the present invention.

[0043] Figure 3 yes Figure 2 A-axis sectional view.

[0044] Figure 4 yes Figure 2 Middle B-direction sectional view.

[0045] Figure 5 2 is a side view of a fan system according to an embodiment of the present invention.

[0046] Figure 6 yes Figure 5 Middle C-section view.

[0047] Figure 7 yes Figure 5 Middle D-section view.

[0048] Figure 8 1 is an exploded view of a fan system according to an embodiment of the present invention.

[0049] Figure 9 Schematic diagram of the structure of the middle frame, the second layer of microporous noise reduction structure and the fourth layer of microporous noise reduction structure in an embodiment of the present invention.

[0050] Figure 10 Schematic diagram of the structure of the middle frame and the flexible transverse partition in an embodiment of the present invention.

[0051] Figure 11 It is a structural schematic diagram of the middle frame and the fan body in an embodiment of the present invention.

[0052] Figure 12 It is a structural diagram of the middle frame in an embodiment of the present invention.

[0053] Figure 13 Schematic diagram of the structure of the second layer of microporous noise reduction structure and the fourth layer of microporous noise reduction structure in an embodiment of the present invention.

[0054] Figure 14 Schematic diagram of the structure of the third ventilation duct in an embodiment of the present invention.

[0055] Figure 15 Schematic diagram of the structure of the first ventilation pipe in an embodiment of the present invention.

[0056] Figure 16 Schematic diagram of the structure of the third microplate in an embodiment of the present invention.

[0057] Description of reference numerals:

[0058] 10. Shell; 11. Inlet; 12. Outlet; 13. Main compartment; 14. First auxiliary compartment; 15. Second auxiliary compartment; 16. Third auxiliary compartment; 1a. Bottom tank; 1b. Middle frame; 1c. Top cover;

[0059] 20. Fan body; 21. Air inlet; 22. Air outlet;

[0060] 30. First layer of microporous noise reduction structure; 31. First microporous plate; 32. First vertical plate;

[0061] 40. Second layer of microporous noise reduction structure; 41. Second microporous plate; 42. Second vertical plate;

[0062] 51. Flexible transverse partition; 511. First ventilation duct; 52. Hard longitudinal partition; 521. Second ventilation duct;

[0063] 60. Third layer of microporous noise reduction structure; 61. Third vertical plate; 62. Third microporous plate;

[0064] 70. Third ventilation duct;

[0065] 80. Fourth layer of microporous noise reduction structure; 81. Fourth microporous plate; 82. Fourth vertical plate. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of the present invention more clear and distinct, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0067] Please also see Figures 1-16 The present invention provides some embodiments of a blower system. The hollow arrows in the figure indicate the direction of gas flow.

[0068] like Figure 1 、 Figure 4 and Figure 12 As shown, the fan system of the present invention includes:

[0069] Housing 10;

[0070] The fan body 20, the first layer of microporous noise reduction structure 30 and the second layer of microporous noise reduction structure 40 are sequentially arranged in the housing 10 at intervals;

[0071] In which, the fan body 20 has an air inlet 21, and the air inlet 21 faces the first layer of microporous noise reduction structure 30; the perforation rate of the first layer of microporous noise reduction structure 30 is greater than the perforation rate of the second layer of microporous noise reduction structure 40; along the direction of the air inlet 21, the distance between the first layer of microporous noise reduction structure 30 and the second layer of microporous noise reduction structure 40 is H1, and the distance between the second layer of microporous noise reduction structure 40 and the shell 10 is H2, H1<H2.

[0072] Specifically, there is a fan body 20 in the fan system. The fan body 20 refers to a machine that outputs air at a certain wind speed. The fan body 20 has an air inlet 21 and an air outlet 22. The fan body 20 also has blades. The rotation of the blades accelerates the air flow and increases the wind speed. The blades are close to the air inlet 21, and noise is generated due to the air acceleration process. During the rotation of the blades, friction is generated between the blades and other structures, which also generates noise. Therefore, the noise near the air inlet 21 is relatively large. By configuring the first layer of microporous noise reduction structure 30 and the second layer of microporous noise reduction structure 40 near the air inlet 21, and by configuring different perforation rates and different spacings, the noise of the fan body 20 is reduced in a wider frequency band.

[0073] A microporous noise reduction structure has multiple micropores with micron-scale pore diameters, for example, 0.1mm to 2mm in diameter. The microporous plate thickness of the microporous noise reduction structure is also micron-scale, for example, 0.1mm to 2mm. The micropores have a certain perforation ratio, which refers to the percentage of the micropore area to the total area of ​​the microporous noise reduction structure. The perforation ratio of a microporous noise reduction structure can be 0.5% to 5%. When noise passes through the micropores, a corresponding cavity is formed behind the micropores. The reciprocating vibration of the air inside the micropores causes friction, converting the sound energy into heat energy, thereby consuming the sound energy. The first and second microporous noise reduction structures 30 and 40 differ in terms of porosity, spacing, and position. The first microporous noise reduction structure 30 is located between the air inlet 21 and the second microporous noise reduction structure 40, closer to the fan body 20 and farther away from it. The micropores of the first microporous noise reduction structure 30 have a higher porosity, while those of the second microporous noise reduction structure 40 have a lower porosity. The distance H1 between the first and second microporous noise reduction structures 30 and 40 is smaller, while the distance H2 between the second microporous noise reduction structure 40 and the housing 10 is larger. H2 is the distance between the second microporous noise reduction structure 40 and the housing 10 in the direction of the air inlet 21. The micropores of the first microporous noise reduction structure 30 absorb higher-frequency sound waves, while the micropores of the second microporous noise reduction structure 40 absorb lower-frequency sound waves. The first layer of microporous noise reduction structure 30 has a high perforation rate, which is conducive to low-frequency sound waves reaching the second layer of microporous noise reduction structure 40 and being absorbed by the second layer of microporous noise reduction structure 40 .

[0074] The present application adopts a differentiated first-layer microporous noise reduction structure 30 and a second-layer microporous noise reduction structure 40 to reduce the noise near the air inlet of the fan body 20 as much as possible.

[0075] In addition, when the fan body 20 is started, air continuously enters the air inlet 21, and negative pressure is easily formed near the air inlet 21, and negative pressure is also formed in the first layer of microporous noise reduction structure 30 and the second layer of microporous noise reduction structure 40, reducing the propagation speed of sound waves, making it easier for the micropores of the first layer of microporous noise reduction structure 30 and the micropores of the second layer of microporous noise reduction structure 40 to fully absorb sound waves and reduce noise.

[0076] In a preferred implementation of the embodiment of the present invention, Figure 4 and Figure 12 As shown, the micropores of the first layer of micropore noise reduction structure 30 are first horn holes, and the small ends of the first horn holes face the fan body 20 .

[0077] Specifically, the micropores of the first-layer microporous noise reduction structure 30 are first trumpet holes, each having a small end and a large end. The small end of the first trumpet hole faces the fan body 20 (i.e., upward), while the large end of the first trumpet hole faces the second-layer microporous noise reduction structure 40 (i.e., downward). The use of first trumpet holes facilitates the diffusion of low-frequency sound waves after passing through the first trumpet holes, allowing the second-layer microporous noise reduction structure 40 to fully absorb the low-frequency sound waves.

[0078] In a preferred implementation of the embodiment of the present invention, Figure 4-Figure 9 As shown, the micropores of the second-layer microporous noise reduction structure 40 are second speaker holes, and the small ends of the second speaker holes face the first-layer microporous noise reduction structure 30 .

[0079] Specifically, the micropores of the second-layer microporous noise reduction structure 40 serve as second horn holes. These second horn holes have a small end and a large end. The small end of the second horn hole faces the first-layer microporous noise reduction structure 30 (i.e., upward), while the large end of the second horn hole faces the housing 10 (i.e., downward). The use of the second horn hole facilitates the separation and dissipation of unabsorbed sound waves.

[0080] In a preferred implementation of the embodiment of the present invention, Figure 3 、 Figure 4 、 Figure 10 、 Figure 11 and Figure 15 As shown, the fan system further includes:

[0081] A flexible transverse diaphragm 51 surrounds the fan body 20;

[0082] A hard longitudinal partition 52 is located on the side of the fan body 20;

[0083] Among them, the flexible transverse partition 51 and the hard longitudinal partition 52 divide the shell 10 into a main compartment 13, a first auxiliary compartment 14, and a second auxiliary compartment 15; the first layer of microporous noise reduction structure 30, the second layer of microporous noise reduction structure 40 and the shell 10 form a third auxiliary compartment 16; an inlet 11 and an outlet 12 are formed on the shell 10, the inlet 11 is connected to the third auxiliary compartment 16, and the outlet 12 is connected to the second auxiliary compartment 15; the flexible transverse partition 51 is provided with a plurality of first ventilation pipes 511, and the first ventilation pipes 511 are connected to the main compartment 13 and the first auxiliary compartment 14; the air outlet 22 of the fan body 20 is connected to the second auxiliary compartment 15; the hard longitudinal partition 52 forms at least one second ventilation pipe 521, and the second ventilation pipe 521 is connected to the first auxiliary compartment 14 and the third auxiliary compartment 16.

[0084] Specifically, the housing 10 is configured with a flexible transverse partition 51 and a rigid longitudinal partition 52. The flexible transverse partition 51 is made of a flexible material and is arranged horizontally; the rigid longitudinal partition 52 is made of a rigid material and is arranged vertically. The flexible transverse partition 51 and the rigid longitudinal partition 52 divide the housing 10 into a main compartment 13, a first auxiliary compartment 14, and a second auxiliary compartment 15. The first auxiliary compartment 14 and the main compartment 13 are located on the upper and lower sides of the flexible transverse partition 51, respectively, and the first auxiliary compartment 14 is connected to the main compartment 13. The second auxiliary compartment 15 and the main compartment 13 are located on either side of the rigid longitudinal partition 52 in the horizontal direction, and the second auxiliary compartment 15 is connected to the air outlet 22 of the fan body 20. The first and second layers of microporous noise reduction structures 30, 40, and the housing 10 form a third auxiliary compartment 16, which is connected to the first auxiliary compartment 14. Air enters the third auxiliary chamber 16 through the inlet 11, passes through the first auxiliary chamber 14 and the main chamber 13 in sequence, enters the fan body 20 through the air inlet 21, passes through the second auxiliary chamber 15 through the air outlet 22, and flows out through the outlet 12. The first auxiliary chamber 14 and the main chamber 13 are connected by a first ventilation pipe 511, and the first auxiliary chamber 14 and the third auxiliary chamber 16 are connected by a second ventilation pipe 521.

[0085] In a preferred implementation of the embodiment of the present invention, Figure 3 、 Figure 10 、 Figure 11 and Figure 14 As shown, a third layer of microporous noise reduction structure 60 and a plurality of third ventilation pipes 70 are provided in the second auxiliary bin 15 . The micropores of the third layer of microporous noise reduction structure 60 are third speaker holes, and the third ventilation pipes 70 are located in the middle position of the second auxiliary bin 15 .

[0086] Specifically, a third-layer microporous noise reduction structure 60 and a third ventilation duct 70 are provided within the second auxiliary compartment 15. The third-layer microporous noise reduction structure 60 is located below the third ventilation duct 70 and the air outlet 22. The micropores of the third-layer microporous noise reduction structure 60 are third horn holes, each having a small end and a large end. The small end of the third horn hole faces the third ventilation duct 70 (i.e., upward), while the large end of the third horn hole faces away from the third ventilation duct 70 (i.e., downward). The third ventilation duct 70 is located midway between the outlet 12 and the air outlet 22.

[0087] In a preferred implementation of the embodiment of the present invention, Figure 2-Figure 4 As shown, a fourth layer of microporous noise reduction structure 80 is provided in the third auxiliary chamber 16 , and the micropores of the fourth layer of microporous noise reduction structure 80 are fourth speaker holes.

[0088] Specifically, a fourth-layer microporous noise reduction structure 80 is disposed within the third auxiliary chamber 16 and is located below the inlet 11. The micropores of the fourth-layer microporous noise reduction structure 80 are fourth horn holes, each having a small end and a large end. The small end of the fourth horn hole faces the first-layer microporous noise reduction structure 30 (i.e., upward), while the large end of the fourth horn hole faces away from the first-layer microporous noise reduction structure 30 (i.e., downward).

[0089] In a preferred implementation of the embodiment of the present invention, Figure 1 and Figure 4 As shown, the housing 10 includes: a bottom tank 1a, a middle frame 1b and a top cover 1c connected in sequence; the first layer of microporous noise reduction structure 30 includes:

[0090] The first micro-well plate 31 is disposed at the bottom of the middle frame 1 b.

[0091] Specifically, the bottom tank 1a is connected to the bottom of the middle frame 1b, and the top cover 1c is connected to the top of the middle frame 1b. The first micro-well plate 31 is disposed at the bottom of the middle frame 1b.

[0092] In a preferred implementation of the embodiment of the present invention, Figure 12 As shown, a first vertical plate 32 is provided on the first microporous plate 31 ; the micropores of the first microporous plate 31 and the second ventilation pipe 521 are respectively located on both sides of the first vertical plate 32 .

[0093] Specifically, a first vertical plate 32 is provided on a side of the first microporous plate 31 facing away from the fan body 20 , and the micropores of the first microporous plate 31 and the second ventilation pipe 521 are respectively located on both sides of the first vertical plate 32 .

[0094] In a preferred implementation of the embodiment of the present invention, Figure 4 and Figure 13 As shown, the second layer of microporous noise reduction structure 40 includes:

[0095] The second microporous plate 41 is located in the bottom tank 1a;

[0096] The first vertical plate 32 abuts against the second microporous plate 41 .

[0097] Specifically, the second microporous plate 41 is located in the bottom groove 1 a , and the first vertical plate 32 abuts against the upper surface of the second microporous plate 41 .

[0098] In a preferred implementation of the embodiment of the present invention, Figure 4 and Figure 13 As shown, a second vertical plate 42 is provided on the second microporous plate 41 , the second vertical plate 42 abuts against the bottom of the bottom groove 1 a , and the second vertical plate 42 is located at a corresponding position of the first vertical plate 32 .

[0099] Specifically, a second vertical plate 42 is provided on the side of the second microporous plate 41 facing away from the fan body 20. The second vertical plate 42 abuts against the bottom of the bottom groove 1a, and the first vertical plate 32 and the bottom groove 1a clamp and secure the second layer of microporous noise reduction structure 40. The position of the second vertical plate 42 corresponds to that of the first vertical plate 32.

[0100] In a preferred implementation of the embodiment of the present invention, Figure 3 、 Figure 4 、 Figure 7-Figure 9 As shown, the fourth layer of microporous noise reduction structure 80 includes:

[0101] The fourth microporous plate 81 is disposed on the second vertical plate 42 .

[0102] Specifically, the fourth microporous plate 81 is disposed outside the second vertical plate 42 . A fourth vertical plate 82 is disposed at the edge of the fourth microporous plate 81 , and the fourth vertical plate 82 abuts against the bottom of the bottom tank 1 a to support the fourth microporous plate 81 .

[0103] In a preferred implementation of the embodiment of the present invention, Figure 3 、 Figure 10 、 Figure 11 and Figure 16 As shown, the third layer of microporous noise reduction structure 60 includes:

[0104] A third vertical plate 61 is provided on the first microporous plate 31;

[0105] The third microplate 62 is located in the second auxiliary chamber 15;

[0106] The third microporous plate 62 abuts against the third vertical plate 61 and the hard longitudinal partition 52 .

[0107] Specifically, the third vertical plate 61 is disposed on the first microporous plate 31 , and the third vertical plate 61 supports the third microporous plate 62 .

[0108] Based on the fan system described in any one of the above embodiments, the present invention also provides a preferred embodiment of a ventilator.

[0109] A ventilator according to an embodiment of the present invention includes: a blower system as described in any one of the above items.

[0110] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A fan system, characterized in that: include: case; The fan body, the first layer of microporous noise reduction structure and the second layer of microporous noise reduction structure are sequentially arranged in the shell at intervals; Wherein, the fan body has an air inlet, and the air inlet faces the first layer of microporous noise reduction structure; The perforation rate of the first layer of microporous noise reduction structure is greater than the perforation rate of the second layer of microporous noise reduction structure; Along the direction of the air inlet, the distance between the first layer of microporous noise reduction structure and the second layer of microporous noise reduction structure is H1, and the distance between the second layer of microporous noise reduction structure and the shell is H2, H1<H2; The fan system further comprises: A flexible diaphragm surrounds the fan body; A hard longitudinal partition plate is located on the side of the fan body; The flexible transverse partition and the rigid longitudinal partition divide the shell into a main compartment, a first auxiliary compartment, and a second auxiliary compartment; The first layer of microporous noise reduction structure, the second layer of microporous noise reduction structure and the shell form a third auxiliary compartment; An inlet and an outlet are formed on the housing, the inlet is connected to the third auxiliary compartment, and the outlet is connected to the second auxiliary compartment; The flexible transverse partition is provided with a plurality of first ventilation pipes, and the first ventilation pipes are connected with the main compartment and the first auxiliary compartment; The air outlet of the fan body is connected to the second auxiliary compartment; The hard longitudinal partition forms at least one second ventilation duct, and the second ventilation duct connects the first auxiliary compartment and the third auxiliary compartment.

2. The fan system according to claim 1, characterized in that: The micropores of the first layer of micropore noise reduction structure are first horn holes, and the small ends of the first horn holes face the fan body; The micropores of the second-layer micropore noise reduction structure are second speaker holes, and the small ends of the second speaker holes face the first-layer micropore noise reduction structure.

3. The fan system according to any one of claims 1 to 2, characterized in that: A third layer of microporous noise reduction structure and a plurality of third ventilation pipes are provided in the second auxiliary bin. The micropores of the third layer of microporous noise reduction structure are third speaker holes, and the third ventilation pipes are located in the middle of the second auxiliary bin.

4. The fan system according to claim 3, characterized in that: A fourth layer of microporous noise reduction structure is provided in the third auxiliary chamber, and the micropores of the fourth layer of microporous noise reduction structure are fourth speaker holes.

5. The fan system according to claim 4, characterized in that: The housing comprises: a bottom tank, a middle frame and a top cover connected in sequence; the first layer of microporous noise reduction structure comprises: The first microporous plate is arranged at the bottom of the middle frame.

6. The fan system according to claim 5, characterized in that: The first microporous plate is provided with a first vertical plate; the micropores of the first microporous plate and the second ventilation pipe are respectively located on both sides of the first vertical plate; The second layer of microporous noise reduction structure includes: A second microplate is located in the bottom tank; Wherein, the first vertical plate abuts against the second microporous plate.

7. The fan system according to claim 6, characterized in that: The second microplate is provided with a second vertical plate, the second vertical plate abuts against the bottom of the bottom trough, and the second vertical plate is located at a corresponding position of the first vertical plate; The fourth layer of microporous noise reduction structure includes: The fourth microporous plate is arranged on the second vertical plate.

8. The fan system according to claim 5, characterized in that: The third layer of microporous noise reduction structure includes: a third vertical plate, disposed on the first microporous plate; a third microplate, located in the second auxiliary chamber; Wherein, the third microporous plate abuts against the third vertical plate and the hard longitudinal partition.

9. A ventilator, characterized in that: include: The fan system according to any one of claims 1 to 8.

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