CN113236606B

CN113236606B - Sound-eliminating box and breathing machine

Info

Publication number: CN113236606B
Application number: CN202110592168.6A
Authority: CN
Inventors: 陈超; 邓武雄; 彭四明
Original assignee: Hunan Beyond Medical Technology Co ltd
Current assignee: Hunan Beyond Medical Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2023-06-06
Anticipated expiration: 2041-05-28
Also published as: CN113236606A

Abstract

The embodiment of the invention provides a sound-reducing box and a breathing machine, and relates to the field of medical equipment. Aiming at improving the problem of excessive noise of ventilation equipment. The silencer comprises a shell, wherein the shell is provided with a first chamber, a second chamber and a channel for communicating the first chamber with the second chamber, and the first chamber is provided with an air inlet; the fan is provided with a fan inlet and is arranged in the second cavity; the rib position group comprises a plurality of first rib plates; the first rib plates are arranged in the first cavity and located in the flowing wind direction from the air inlet to the channel, and the first rib plates are distributed in a staggered mode. In the fan operation process, noise collected by the second cavity flows into the first cavity through the channel, and then passes through the rib position group, the longer the sound wave propagation distance is, the more energy attenuation is, the rib position group reflects and interferes sound waves, the sound waves bypass obstacles, and the noise reduction effect can be achieved.

Description

Sound-eliminating box and breathing machine

Technical Field

The invention relates to the field of medical equipment, in particular to a sound-reducing box and a breathing machine.

Background

The common positive pressure ventilation equipment in the current market has overlarge noise when in use, seriously affects the sleeping quality of patients and families, can relieve the symptoms such as snoring, low ventilation and the like, but greatly reduces the mental appearance of the patients, and affects the working, learning and life quality of the patients. In addition, the hearing of the patient is also impaired when the patient is in a noisy environment with high decibels for a long period of time.

Disclosure of Invention

The object of the present invention consists, for example, in providing a sound deadening box that is able to ameliorate the problem of excessive noise of the ventilation device.

It is also an object of the present invention to provide a ventilator that ameliorates the problem of excessive ventilator noise.

Embodiments of the invention may be implemented as follows:

an embodiment of the present invention provides a muffler box including:

the device comprises a shell, a first cavity, a second cavity and a channel, wherein the channel is used for communicating the first cavity with the second cavity;

the fan is arranged in the second cavity;

the rib position group comprises a plurality of first rib plates; the first rib plates are arranged in the first cavity and located in the flowing direction from the air inlet to the channel, and the first rib plates are distributed in a staggered mode.

In addition, the sound-reducing box provided by the embodiment of the invention can also have the following additional technical characteristics:

optionally, the plurality of first rib plates are distributed in a plurality of annular arrays which are sequentially surrounded.

Optionally, the silencing box further comprises a plurality of second rib plates; the second rib plates are arranged in the first cavity and distributed at intervals along the flowing wind direction from the air inlet to the channel.

Optionally, the second rib plate comprises a first plate and a second plate which are arranged at an included angle; the opening with smaller included angle formed by the first plate and the second plate is close to the channel relative to the opening with larger included angle.

Optionally, the silencing box further comprises an air resistor; the air resistor is arranged in the first cavity; the second rib plates, the rib position groups and the air resistors are arranged at intervals along the flowing wind direction from the air inlet to the channel.

Optionally, the silencing box further comprises a partition plate; the partition plate is positioned in the first cavity and used for dividing the first cavity into a spirally extending air channel, and the air channel is communicated with the air inlet and the channel; the rib position group is arranged at the middle section of the air duct.

Optionally, the silencing box further comprises air duct bottom cotton; and the air duct bottom cotton is laid on the air duct.

Optionally, the silencing box further comprises fan side cotton, the fan side cotton is annular, and the fan side cotton is sleeved between the outer wall of the fan and the inner wall of the second chamber, so that the fan side cotton divides the second chamber into an upper chamber and a lower chamber; the upper chamber is far away from the first chamber relative to the lower chamber, the fan is provided with a fan inlet, and the fan inlet of the fan is positioned in the lower chamber;

the upper chamber is communicated with the first chamber through the channel; the fan side cotton is provided with a plurality of gas holes, the gas hole intercommunication go up the cavity with the cavity down.

Optionally, the silencing box further comprises fan cotton; the fan is provided with a fan inlet, and the fan inlet cotton is arranged in the second cavity and is opposite to the fan inlet.

The embodiment of the invention also provides a breathing machine. The ventilator includes a sound reduction box.

The sound-reducing box and the breathing machine have the beneficial effects that:

noise elimination box, at fan operation in-process, noise that the second cavity was collected flows into first cavity through the passageway, and when passing through muscle position crowd, the propagation of noise can be blockked to the muscle position crowd, and the muscle position crowd utilizes reflection, scattering, interference, the high frequency sound of acoustic wave to bypass characteristics such as barrier ability low, reaches the effect of making an uproar of falling. Meanwhile, noise collected by the second chamber flows into the first chamber through the channel, so that the propagation distance is increased, the longer the propagation distance of sound waves is, the more energy attenuation is achieved, and the noise reduction effect is further achieved.

The breathing machine comprises the sound eliminating box, and can solve the problem that the noise of ventilation equipment is too large.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a sound-reducing box according to an embodiment of the present invention;

fig. 2 is an exploded view of a sound-reducing box according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an internal structure of a sound-reducing box according to a first view angle provided by an embodiment of the present invention;

fig. 4 is a schematic diagram of an internal structure of a second view angle of a sound-reducing box according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an internal structure of a third view angle of a sound-reducing box according to an embodiment of the present invention.

Icon: 10-a sound-eliminating box; 20-a housing; 100-upper shell; 110-middle shell; 111-side plates; 112-a bottom plate; 113-a first support plate; 114-a third support plate; 120-bottom shell; 121-a second support plate; 122-fourth support plate; 123-a first sealing clamping groove; 124-a second sealing slot; 200-a first chamber; 201-an air inlet; 211-upper chamber; 212-a lower chamber; 220-channel; 30-a fan; 31-fan inlet; 32-a fan outlet; 300-a first flow channel; 310-middle flow channel; 320-a second flow channel; 400-rib position groups; 401-a first rib plate; 420-a second rib plate; 430-air resistance; 441—a first sampling port; 442-a second sampling port; 500-air duct bottom cotton; 510-a slit; 600-fan side cotton; 610-air holes; 700-fan cotton; 800-a top rubber support of a fan; 810-a fan air outlet rubber support; 820-a bottom rubber support of the fan; 900-sealing line cards; 910-line aperture.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

The sound-deadening box 10 provided in this embodiment is described in detail below with reference to fig. 1 to 5.

Referring to fig. 1, the present embodiment provides a muffler box 10, including: a housing 20, the housing 20 having a first chamber 200, a second chamber, and a passage 220 communicating the first chamber 200 and the second chamber, the first chamber 200 having an air inlet 201; the fan 30 is arranged in the second cavity; and a rib site group 400, the rib site group 400 including a plurality of first rib plates 401; the first rib plates 401 are arranged in the first cavity 200 and located in the flowing wind direction from the air inlet 201 to the channel 220, and the first rib plates 401 are distributed in a staggered mode.

The blower 30 has a blower inlet 31 and a blower outlet 32. Air enters the first chamber 200 from the air inlet 201, enters the second chamber from the passage 220, then enters the blower 30 through the blower inlet 31, and exits from the blower outlet 32 of the blower 30. In the operation process of the fan 30, noise collected by the second chamber flows into the first chamber 200 through the channel 220, when the noise passes through the rib position group 400, the rib position group 400 can block the propagation of the noise, filter high-frequency noise, and achieve the effect of noise reduction by utilizing the characteristics of low capability of the reflection, scattering, interference and high-frequency sound of sound waves to bypass obstacles and the like. Meanwhile, the noise collected by the second chamber flows into the first chamber 200 through the channel 220, so that the propagation distance is increased, and the longer the propagation distance of the sound wave is, the more energy is attenuated, so that the noise reduction effect is further achieved.

Referring to fig. 2 and 3, the case 20 includes an upper case 100, a middle case 110, and a bottom case 120, which are sequentially connected. The middle case 110 includes a side plate 111 and a bottom plate 112 connected to each other, a first chamber 200 is defined between the bottom plate 112 and the bottom case 120 of the middle case 110, and a second chamber is defined between the middle case 110 and the upper case 100, and is located above the bottom plate 112. The side wall of the middle case 110 and the side wall of the bottom case 120 enclose an air inlet 201.

Referring to fig. 4, the "staggered distribution of the plurality of first rib plates 401" means that the plurality of first rib plates 401 are staggered at intervals within a predetermined region. Further, the plurality of first rib plates 401 are distributed in an annular array. Further, the first rib plates 401 are distributed in a plurality of annular arrays which are sequentially encircling. Further, the plurality of first rib plates 401 are distributed in a plurality of concentric annular arrays.

Specifically, referring to fig. 4, the plurality of first rib plates 401 are divided into a plurality of groups, the first rib plates 401 of each group are sequentially spaced apart along a ring shape, and the plurality of groups are sequentially surrounded. The interval between two adjacent first rib plates 401 in the circumferential direction in each group may be unequal, and the interval between two adjacent groups in the radial direction may be unequal.

Specifically, the rib site group 400 is disposed in the middle of the first chamber 200.

Referring to fig. 4, in this embodiment, the sound-deadening box 10 further includes a plurality of second rib plates 420; a plurality of second rib plates 420 are disposed in the first chamber 200 and are spaced apart along the flow direction of the air inlet 201 to the channel 220.

In this embodiment, the second rib plate 420 includes a first plate and a second plate disposed at an included angle; the smaller included angle openings formed by the first plate and the second plate are adjacent to the channel 220 relative to the larger included angle openings.

The second rib 420 can collect and reflect acoustic energy, and the reflected acoustic wave and the main acoustic wave have different phases and time delay, so that the original main acoustic wave can be interfered, and the acoustic energy can be cancelled. The longer the noise propagation distance, the more energy decays.

Specifically, the first plate and the second plate form a V-shaped structure. The V-shaped opening is adjacent to the channel 220 in the flow direction of the wind direction. The V-shaped structure is arranged between the air inlet 201 and the rib position group 400, and the noise reduction effect is remarkable. The V-shaped structure is designed taking into account the cross-sectional size of the first flow channel 300 as mentioned below.

Referring to fig. 4, in the present embodiment, the sound-deadening box 10 further includes an air lock 430; the air resistor 430 is disposed within the first chamber 200; the second rib plates 420, the rib groups 400 and the air resistors 430 are arranged at intervals along the flowing wind direction from the air inlet 201 to the channel 220. The air resistor 430 is used to block the flow of air. Specifically, the air resistor 430 is connected to a side of the bottom plate 112 of the middle case 110 facing the bottom case 120. The air resistance can reduce the propagation cross-sectional area of the acoustic energy.

In this embodiment, the sound-reducing box 10 further includes a flow sensor, where the first chamber 200 is provided with a first sampling port 441 and a second sampling port 442 at two sides of the air resistor 430, and the flow sensor is connected to the first sampling port 441 and the second sampling port 442, so as to output air pressure signals representing air at two sides of the air resistor 430, and the controller obtains air flow passing through per unit time according to the air pressure signals of the air at two sides of the air resistor 430. Specifically, the air pressure difference is obtained according to the air pressure signals of the air at both sides of the air resistor 430, and the air flow rate passing through per unit time is obtained according to the air pressure difference.

Referring to fig. 4, in the present embodiment, the muffler box 10 further includes a partition plate; the partition board is positioned in the first chamber 200 and is used for dividing the first chamber 200 into a spirally extending air channel, and the air channel is communicated with the air inlet 201 and the channel 220; the rib position group 400 is arranged at the middle section of the air duct.

Specifically, the air duct includes a first flow channel 300, a middle flow channel 310 and a second flow channel 320 that are sequentially connected, wherein one end of the first flow channel 300 far away from the middle flow channel 310 is communicated with the air inlet 201, and one end of the second flow channel 320 far away from the middle flow channel 310 is communicated with the channel 220. The rib site group 400 is disposed within the central flow passage 310. The first flow channel 300 and the second flow channel 320 are respectively disposed circumferentially around the outer periphery of the middle flow channel 310.

Referring to fig. 4, in particular, the partition plate includes a first arc plate and a second arc plate extending along an arc, and the first arc plate and the second arc plate are in a mutually buckled state; the first arc plate is close to the inner wall of one end of the air inlet 201 and the outer wall of one end of the second arc plate enclose a first flow channel 300, the inner wall of one end of the first arc plate, which is far away from the air inlet 201, and the inner wall of one end of the second arc plate enclose a middle flow channel 310, and the outer wall of one end of the first arc plate, which is far away from the air inlet 201, and the inner wall of the other end of the second arc plate enclose a second flow channel 320.

Referring to fig. 2 and 4, in detail, the first arc plate includes a first support plate 113 connected to the bottom plate 112 of the middle case 110 and a second support plate 121 connected to the bottom case 120; the second arc plate includes a third support plate 114 connected to the bottom plate 112 of the middle case 110 and a fourth support plate 122 connected to the bottom plate 112. The end surfaces of the first support plate 113 and the second support plate 121 are respectively provided with a first sealing clamping groove 123, and after the first support plate 113 is connected with the second support plate 121, the first sealing strips are sealed in the two first sealing clamping grooves 123, so that the sealing connection between the first support plate 113 and the second support plate 121 is realized. The end face of the third support plate 114 and the end face of the fourth support plate 122 are respectively provided with a second sealing clamping groove 124, and after the third support plate 114 is connected with the fourth support plate 122, the second sealing strips are sealed in the two second sealing clamping grooves 124, so that the sealing connection between the third support plate 114 and the fourth support plate 122 is realized. After the bottom case 120 is connected with the middle case 110, the first support plate 113 and the second support plate 121 are correspondingly sealed, and the third support plate 114 and the fourth support plate 122 are correspondingly sealed so as to enclose an air duct.

Referring to fig. 4, specifically, the middle case 110 and the bottom case 120 have a quadrangular shape, the air inlet 201 and the channel 220 are correspondingly disposed at opposite corners of the middle case 110, and the first flow channel 300, the middle flow channel 310 and the second flow channel 320 are located between the air inlet 201 and the channel 220.

Referring to fig. 2, in this embodiment, the sound-reducing box 10 further includes an air duct bottom cotton 500; the air duct bottom cotton 500 is laid on the air duct. Specifically, the air duct bottom cotton 500 is provided with a slit 510, and the second support plate 121 and the fourth support plate 122 are embedded into the slit 510, so that the air duct bottom cotton 500 covers the bottom wall of the bottom shell 120. Specifically, the air duct bottom cotton 500 is sound absorbing cotton.

The sound absorption principle of the sound absorption cotton is that the sound absorption cotton has a plurality of micropores formed by air, and sound waves reaching the sound absorption cotton can be buffered and absorbed, so that the sound waves are not reflected out from the plane with the sound absorption cotton.

Referring to fig. 2 and 4, the first sealing strip is inserted into the first sealing catching groove 123 of the first support plate 113, the second sealing strip is inserted into the second sealing catching groove 124 of the third support plate 114, and then the air resistor 430 is inserted into the catching groove of the middle case 110. The back adhesive surface of the air duct bottom cotton 500 is adhered to the bottom case 120, and the cotton-adhered bottom case 120 is screwed to the middle case 110. Thus, the assembly of the air duct is completed. Triple barriers are arranged in the air duct, wherein the first rib is an air resistor 430, the second rib is a rib group 400, and the third rib is a V-shaped second rib plate 420.

Referring to fig. 3 and 5, in the present embodiment, the sound-reducing box 10 further includes a fan-side cotton 600, the fan-side cotton 600 is annular, and the fan-side cotton 600 is sleeved between the outer wall of the fan 30 and the inner wall of the second chamber, so as to divide the second chamber into an upper chamber 211 and a lower chamber 212 by the fan-side cotton 600; the upper chamber 211 is remote from the first chamber 200 relative to the lower chamber 212, and the blower inlet 31 of the blower 30 is located within the lower chamber 212; the upper chamber 211 communicates with the first chamber 200 through the passage 220; the fan-side cotton 600 is provided with a plurality of air holes 610, and the air holes 610 communicate with the upper chamber 211 and the lower chamber 212.

The upper chamber 211, the lower chamber 212, and the first chamber 200 are disposed in this order from top to bottom, as described with respect to the relative positions of fig. 3.

Air enters the first chamber 200 from the air inlet 201, enters the upper chamber 211 from the channel 220, then enters the lower chamber 212 through the air holes 610 of the fan-side cotton 600, then enters the fan 30 through the fan inlet 31 of the fan 30, and flows out from the fan outlet 32 of the fan 30. During operation of the blower 30, noise collected by the lower chamber 212 enters the upper chamber 211 through the air holes 610 of the blower side cotton 600, then enters the first chamber 200 through the passage 220, and then sequentially passes through the triple obstacle. Specifically, the fan-side cotton 600 is sound-absorbing cotton.

The air holes 610 on the fan-side cotton 600 are disposed as far from the air duct as possible, so that the propagation distance of sound can be increased. The cross-sectional area and the number of the air holes 610 and the characteristics of the fan-side cotton 600 are controlled according to the need, so that the noise is reduced. The thickness of the fan-side cotton 600 is designed according to the height of the fan 30, so that the fan-side cotton is convenient to assemble, and meanwhile, the freedom degree of the periphery of the fan 30 can be limited, and the fan 30 is prevented from deviating when falling.

Specifically, the plurality of air holes 610 and the channel 220 are diagonally arranged with respect to the blower. The purpose of reducing noise is achieved by increasing the propagation distance and using the fan as an obstacle.

Referring to fig. 3, in the present embodiment, the sound-deadening box 10 further includes a fan cotton 700; the fan inlet cotton 700 is disposed in the second chamber and is directly opposite to the fan inlet 31. The fan inlet cotton 700 serves to absorb noise flowing out from the fan inlet 31 of the fan 30. Specifically, the fan inlet cotton 700 is sound absorbing cotton.

Continuing to refer to fig. 3, in the present embodiment, the sound-reducing box 10 further includes a top fan glue holder 800, an air outlet fan glue holder 810, and a bottom fan glue holder 820, wherein the top fan glue holder 800 is embedded between the top of the fan 30 and the upper shell 100, the bottom fan glue holder 820 is embedded between the bottom of the fan 30 and the bottom plate 112 of the middle shell 110, and the bottom fan glue holder 32 is arranged between the bottom of the fan 30 and the middle shell 110. A fan inlet 31 of the fan 30 is provided at the bottom of the fan 30. The fan bottom stock 820 is provided with an opening to expose the fan inlet 31 of the fan 30.

The fan top glue support 800, the fan air outlet glue support 810 and the fan bottom glue support 820 are used for improving the stability of the fan 30 installation, reducing the shaking of the fan 30 during operation and noise, and simultaneously avoiding the noise of the fan 30 from directly transmitting through the shell 20.

Referring again to fig. 1, in this embodiment, the sound-reducing box 10 further includes a sealing line card 900, the sealing line card 900 is provided with a line hole 910, the middle shell 110 is provided with a groove, the sealing line card 900 is embedded in the groove of the middle shell 110, and the line hole 910 is used for passing through a wire connected with the fan 30. The sealing line card 900 is used for sealing the electric wire and the middle shell 110, reducing noise leakage and ensuring the air pressure stability of the second chamber.

After the air duct is assembled, the back adhesive surface of the fan port cotton 700 is attached to the corresponding position of the middle shell 110, three support legs of the fan bottom adhesive support 820 are sleeved on the positioning columns of the middle shell 110, the fan side cotton 600 is pressed into the side wall of the middle shell 110, and the fan 30 is sleeved with the fan air outlet adhesive support 810 and then is placed stably along the inner wall of the fan side cotton 600 and the positioning position of the adhesive support on the middle shell 110. The sound at the air inlet 201 of the fan 30 can only be transmitted into the air duct through the holes on the fan-side cotton 600.

And then pressing the third sealing strip into a third sealing clamping groove between the upper shell 100 and the middle shell 110, and placing the fan top rubber support 800 into a circular groove of the upper shell 100. The fan 30 wire is fixed in the groove of the middle shell 110 by a wire clip, and the wire clip is pressed and the upper shell 100 is covered and then fixed by a screw. The sampling ports of the flow sensor are sleeved into the first sampling port 441 and the second sampling port 442 on the sampling port silica gel, and then are fixed on the middle case 110 with screws.

The silencer casing 10 according to the present embodiment has at least the following advantages:

the first cavity 200 is provided with the rib position group 400, the rib position group 400 reflects and interferes sound waves, the high-frequency sound waves bypass obstacles and have low capability of filtering high-frequency noise, and the noise reduction effect is achieved.

Noise collected by the second chamber enters the first chamber 200 through the channel 220, increasing the propagation distance, and the longer the propagation distance of the sound wave, the more energy is attenuated, further achieving the noise reduction effect.

The first cavity 200 is provided with a plurality of second rib plates 420, the second rib plates 420 are of a V-shaped structure, and form barriers together with the rib position groups 400, so that high-frequency sound can be prevented from passing through, sound waves are reflected, and the noise reduction effect is further improved.

The first chamber 200 is provided with an air resistor 430 to block noise transmission and achieve noise reduction effect.

The first cavity 200 is provided with a second rib plate 420 with air resistance, rib position groups and V shape, and is matched with the air duct bottom cotton 500, so that the purpose of reducing noise is achieved.

The first chamber 200 is provided with a spiral air duct, and the air resistance 430, the second rib plates 420 and the triple barriers of the rib position group 400 are arranged in the air duct according to sound transmission characteristics and matched with the air duct bottom cotton 500, so that the noise reduction effect is further improved.

200 is provided with fan-side cotton 600, and noise collected by the lower chamber 212 can enter the upper chamber 211 only through the air holes 610, and then enter the first chamber 200 through the passage 220. In the process, the sound transmission section is limited, the transmission distance is increased, the contact surface of the sound-absorbing cotton and noise is enlarged, and the sound-absorbing cotton efficiency is improved, so that the noise reduction effect is achieved.

This embodiment also provides a ventilator comprising a sound-reducing enclosure 10. The respirator comprises a respirator body, and the silencing box 10 is connected with the respirator body. Improving the problem of excessive noise of ventilation equipment.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A muffler box, comprising:

-a housing (20), the housing (20) having a first chamber (200), a second chamber and a channel (220) communicating the first chamber (200) and the second chamber, the first chamber (200) having an air inlet (201);

a blower (30), the blower (30) being disposed in the second chamber;

a rib site group (400), the rib site group (400) comprising a plurality of first rib plates (401); the first rib plates (401) are arranged in the first cavity (200) and are positioned in the flowing wind direction from the air inlet (201) to the channel (220), and the first rib plates (401) are distributed in a staggered mode;

the fan-side cotton (600) is annular, and the fan-side cotton (600) is sleeved between the outer wall of the fan (30) and the inner wall of the second chamber to divide the second chamber into an upper chamber (211) and a lower chamber (212); the upper chamber (211) is far away from the first chamber (200) relative to the lower chamber (212), the fan (30) is provided with a fan inlet (31), and the fan inlet (31) of the fan (30) is positioned in the lower chamber (212); -said upper chamber (211) communicates with said first chamber (200) through said channel (220); the fan side cotton (600) is provided with a plurality of air holes (610), and the air holes (610) are communicated with the upper chamber (211) and the lower chamber (212).

2. A sound-reducing enclosure as defined in claim 1, wherein:

the first rib plates (401) are distributed in a plurality of annular arrays which are sequentially encircling.

3. A sound-reducing enclosure as defined in claim 1, wherein:

the muffler box further includes a plurality of second gusset plates (420); the plurality of second rib plates (420) are arranged in the first cavity (200) and are distributed at intervals along the flowing wind direction from the air inlet (201) to the channel (220).

4. A sound-reducing enclosure as defined in claim 3, wherein:

the second rib plate (420) comprises a first plate and a second plate which are arranged at an included angle; the smaller included angle openings of the first and second plates are adjacent to the channel (220) relative to the larger included angle openings.

5. A sound-reducing enclosure as defined in claim 4, wherein:

the muffler box further includes an air lock (430); the air resistor (430) is arranged in the first chamber (200); the second rib plates (420), the rib position groups (400) and the air resistors (430) are arranged at intervals along the flowing wind direction from the air inlet (201) to the channel (220).

6. A sound-reducing enclosure as defined in any one of claims 1-5, wherein:

the silencing box further comprises a baffle plate; the partition plate is positioned in the first chamber (200) and is used for dividing the first chamber (200) into a spirally extending air channel, and the air channel is communicated with the air inlet (201) and the channel (220); the rib position group (400) is arranged at the middle section of the air duct.

7. A sound-reducing enclosure as defined in claim 6, wherein:

the silencing box further comprises air duct bottom cotton (500); the air duct bottom cotton (500) is paved on the air duct.

8. A sound-reducing enclosure as defined in any one of claims 1-5, wherein:

the silencing box also comprises fan port cotton (700); the fan (30) is provided with a fan inlet (31), and the fan cotton (700) is arranged in the second cavity and is opposite to the fan inlet (31).

9. A ventilator, characterized in that:

the ventilator comprising a sound-reducing enclosure according to any one of claims 1-8.