Industrial dust collector

Abstract

The utility model relates to an industrial dust collector. The industrial dust collector comprises a box body, a filter cartridge, a cleaning assembly and a negative pressure assembly arranged in the box body, the box body comprises a dust collecting barrel, an air inlet formed in the dust collecting barrel and an air outlet formed in the top of the box body; the filter cartridge is arranged in the dust collecting barrel, the side wall of the filter cartridge is surrounded by a fold-shaped filter membrane, and a cylindrical cavity isolated from the filter chamber is arranged in the filter cartridge; the cleaning assembly is rotatably arranged in the cylindrical cavity and is in contact with the wrinkle bulge of the filter membrane; the first end of the negative pressure assembly communicates with the cylindrical cavity, and the second end is connected with the air outlet. The utility model provides an industrial dust collector which is wide in application range, excellent in filtering performance and capable of conveniently and rapidly cleaning a filter membrane and does not generate loud noise during dust removal.

Description

TECHNICAL FIELD

[0001] The utility model belongs to dust collector technical field, especially, relate to an industrial dust collector. BACKGROUND

[0002] In the industrial production process, dust is a common problem. These dust comes from processing, cutting, grinding, polishing and other operation processes, and the types of dust include metal dust, wood chips, plastic particles, chemical dust, etc. These dusts have significant harm to product quality and the physical and mental health of operators. Generally, various dust collection equipment performs dust collection and filtration treatment at the dust generation site. However, these dusts will gradually adhere to the filter device, causing the filter device to be blocked, which greatly affects the dust collection and filtration efficiency of the dust collection equipment.

[0003] The Chinese patent with application number CN202420344148.6 provides a structure of a new dust removal and filtration unit, which discloses a combination of a backflush pipe and an electromagnetic pulse valve, uses compressed air to impact the filter core, and achieves the technical solution of dust removal. This technical solution has the following technical defects: on the one hand, using pulse compressed air to impact the filter core to remove dust is easy to raise the dust accumulated and adhered to the filter core, causing secondary pollution and generating a large noise; on the other hand, an external air source is needed, resulting in a complex structure of the dust collection and filtration device, and the device cannot be applied to a working scene without an external air source. Therefore, how to provide a dust collector with a wide range of applications, excellent filtration performance, and the ability to clean the filter membrane conveniently and quickly without generating a large noise during dust removal is a technical problem to be solved in the field. UTILITY MODEL CONTENTS

[0004] To solve at least one of the above technical problems, the utility model provides an industrial dust collector, which comprises a box body, a filter cartridge, a cleaning assembly, and a negative pressure assembly arranged in the box body.

[0005] The box body comprises a dust collection bucket, an air inlet arranged in the dust collection bucket, and an air outlet arranged at the top of the box body.

[0006] The filter cartridge is arranged in the dust collection bucket, the side wall is composed of a pleated filter membrane, and a cylindrical cavity isolated from the filter chamber is arranged inside.

[0007] The cleaning assembly is rotatably arranged in the cylindrical cavity and in contact with the pleated protrusions of the filter membrane.

[0008] The negative pressure assembly is in communication with the cylindrical cavity at the first end and connected with the air outlet at the second end.

[0009] Further, the cleaning assembly comprises a rotary shaft, a paddle arranged in the cylindrical cavity, and a rotating hand wheel rotatably arranged on the box body.

[0010] The first end of the rotating shaft penetrates the upper part of the box and is connected with the rotating handle;

[0011] The second end of the rotating shaft extends into the cylindrical cavity and is connected with the push piece;

[0012] The two sides of the push piece are in contact with the wrinkle protrusions of the filter membrane.

[0013] Further, the width of the push piece is 1-2 mm larger than the minimum width between the wrinkle protrusions of the filter membrane in the cylindrical cavity.

[0014] Further, the push pieces are symmetrically arranged on the rotating shaft and are arranged at intervals on the rotating shaft with the rotating shaft as the rotation center.

[0015] Further, the push piece is made of rubber material.

[0016] Further, the industrial dust collector further comprises a cylindrical blocking inner cylinder arranged around the filter cylinder;

[0017] The upper end of the blocking inner cylinder is detachably connected with the box, and the lower end is in open structure.

[0018] There is a gap between the blocking inner cylinder and the filter cylinder, forming an annular air duct.

[0019] Further, the top of the box is provided with a push rod, and the bottom of the box is provided with a mounting bottom plate.

[0020] The mounting bottom plate is made of a bent thin plate and is provided with a reinforcing rib.

[0021] A universal rubber wheel and a brake are arranged below the mounting bottom plate.

[0022] Further, the negative pressure assembly comprises an explosion-proof motor arranged above and an explosion-proof fan arranged below.

[0023] The explosion-proof motor and the explosion-proof fan are provided with a protective cover.

[0024] The protective cover is provided with heat dissipation fins arranged at intervals.

[0025] Further, the negative pressure assembly further comprises a wind guide channel connecting the cylindrical cavity, the explosion-proof fan and the air outlet.

[0026] An silencer is arranged in the wind guide channel in the front section of the air outlet.

[0027] Further, the industrial dust collector further comprises a pressure relief valve arranged at the air inlet.

[0028] The pressure relief valve is provided with a pressure relief hole.

[0029] In this embodiment, an industrial dust collector is given for collecting and filtering various dust-containing gases. In use, the negative pressure assembly operates inside the box to form a negative pressure environment, attracting the dust-containing air flow into the air inlet, and then into the dust collection barrel. Part of the larger dust particles directly settle at the bottom of the collection barrel under the action of gravity, realizing preliminary separation. The air flow containing fine dust enters the cylindrical cavity after filtration from one side of the pleated filter membrane. The fine dust adheres to the pleated filter membrane on the outside of the cylindrical cavity. The filtered clean gas is discharged from the air outlet at the top of the box through the negative pressure assembly, realizing efficient filtration of industrial dust. The pleated filter membrane of the filter cartridge significantly increases the filtration area and improves the dust capture efficiency, effectively meeting the filtration needs of small dust particles. Since the filter membrane protrusion of the cleaning assembly in the cylindrical cavity is just outside the small dust accumulation, the rotation of the cleaning assembly in the cylindrical cavity will cause the filter membrane in the small dust accumulation to be squeezed and vibrated, causing the dust adsorbed and accumulated in the filter membrane pleats to fall off, achieving the effect of cleaning the dust and realizing convenient and rapid cleaning of the filter membrane. Since the cleaning assembly is arranged in the cylindrical cavity and does not directly contact the dust, it will not be contaminated by the dust. The cleaning assembly does not need to be cleaned again, and does not need to be disassembled. The filter cartridge can be cleaned by simply rotating, without generating loud noise during use.

[0030] More advantageously, the rotation of the cleaning assembly does not require an external dust cleaning gas source and is not limited by the length of the dust cleaning gas pipeline. It can be quickly deployed and transferred to different positions, greatly increasing the scope of application. In summary, the industrial dust collector provided by the present application has a wide range of applications, excellent filtration performance, and can conveniently and quickly clean the filter membrane without generating loud noise during dust cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in these drawings without creative labor. In the drawings, the same components are marked with the same reference numerals. The drawings are not drawn according to the actual proportion.

[0032] Figure 1 A schematic view of an embodiment of the industrial dust collector of the present application;

[0033] Figure 2 A sectional view of an embodiment of the industrial dust collector of the present application;

[0034] Figure 3A partial sectional view of one embodiment of the industrial dust collector. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or can have a middle element in between. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or can have a middle element in between.

[0037] It should also be noted that if the present application embodiments involve directional indications, such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship between the components, the movement condition, etc. in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly. In addition, if the present application embodiments involve descriptions such as "first, second", "S1, S2", "step one, step two", etc., such descriptions are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or the number of the indicated technical features or indicating the execution order of the method, etc. Those skilled in the art can understand that any change within the technical concept of the present application without deviating from the key points of the present application should be included in the protection scope of the present application.

[0038] The present application provides an industrial dust collector, referring to Figures 1-3 , comprising: a box body 1, a filter cartridge 2, a cleaning assembly 3 and a negative pressure assembly 4 arranged in the box body 1.

[0039] The box body 1 comprises: a dust collection barrel 11, an air inlet 12 arranged on one side of the upper end of the dust collection barrel 11, and an air outlet 13 arranged on the top of the box body 11.

[0040] The filter cartridge 2 is arranged in the dust collection barrel 11, the side wall is composed of a wrinkle-shaped filter membrane, and a cylindrical cavity 21 isolated from the filter chamber is arranged inside.

[0041] The cleaning assembly 3 is rotatably arranged in the cylindrical cavity 21 and in contact with the wrinkle protrusions of the filter membrane.

[0042] The negative pressure assembly 4 is in communication with the cylindrical cavity 21 at a first end and connected with the air outlet 13 at a second end.

[0043] In this embodiment, an industrial dust collector is given for collecting and filtering various dust-containing gas. In use, the negative pressure assembly operates inside the box to form a negative pressure environment, attracting the dust-containing air flow into the inlet, and then into the dust collection barrel. Part of the larger dust particles directly settle to the bottom of the collection barrel under the action of gravity, realizing preliminary separation. The air flow containing fine dust enters the cylindrical cavity after filtration from one side of the pleated filter membrane. The fine dust adheres to the pleated filter membrane on the outside of the cylindrical cavity. The filtered clean gas is discharged from the air outlet at the top of the box through the negative pressure assembly, realizing efficient filtration of industrial dust. The pleated filter membrane of the filter cartridge significantly increases the filtration area and improves the dust capture efficiency, effectively meeting the filtration needs of small dust particles. Since the filter membrane protrusion in the cylindrical cavity is just outside the small dust accumulation depression, the rotation of the cleaning assembly in the cylindrical cavity will cause the filter membrane in the small dust accumulation depression to be squeezed and vibrated, causing the dust adsorbed and accumulated in the filter membrane pleats to fall off, achieving the effect of cleaning the dust and realizing convenient and rapid cleaning of the filter membrane. Since the cleaning assembly is arranged in the cylindrical cavity and does not directly contact the dust, it will not be contaminated by the dust. The cleaning assembly does not need to be cleaned again, and does not need to be disassembled. The filter cartridge can be cleaned by simply rotating, without generating loud noise during use. More advantageously, the rotation of the cleaning assembly does not require an external dust cleaning gas source and is not limited by the length of the dust cleaning gas pipeline. It can be quickly deployed and transferred to different positions, greatly increasing the application range. In summary, the industrial dust collector provided by the utility model has a wide application range, excellent filtration performance, can conveniently and quickly clean the filter membrane, and does not generate loud noise during dust cleaning.

[0044] Preferably, referring to Figure 1 and Figure 2 , the cleaning assembly includes 3: a rotating shaft 31, a paddle 32 arranged in the cylindrical cavity 21, and a rotating hand wheel 33 arranged on the box 1 and capable of rotating;

[0045] The first end of the rotating shaft 31 penetrates the upper part of the box 1 and is connected with the rotating hand wheel 33;

[0046] The second end of the rotating shaft 31 extends into the cylindrical cavity 21 and is connected with the paddle 32;

[0047] The two sides of the paddle 32 are in contact with the pleated filter membrane protrusion.

[0048] In this embodiment, the operator rotates the rotary hand wheel arranged on the box, and transmits the manually rotated mechanical force to the rotating shaft to drive the paddle to rotate in the cylindrical cavity. The paddle is in close contact with the filter membrane wrinkle protrusions. The rotation of the paddle generates extrusion and vibration, effectively removing the fine dust accumulated outside the cylindrical cavity and at the filter membrane wrinkle protrusions. The dust removal operation of the filter membrane can be easily completed by rotating the hand wheel without the need for complex power drive or gas support, and is not dependent on high-pressure gas flow or high-speed mechanical impact. The dust removal process is low in noise and suitable for use in industrial environments sensitive to noise. More preferably, the side of the rotary hand wheel 33 is provided with a hand wheel connecting shaft 33a; the hand wheel connecting shaft 33a is detachably connected to provide a rotary drive hand wheel driving member; in the case of automation, the rotary hand wheel is driven to rotate by the hand wheel driving member to replace manual operation and improve the automation degree of the equipment. Optionally, the hand wheel driving member generating rotary motion is a servo motor, a rotary cylinder or other devices capable of generating rotary drive function.

[0049] More preferably, the width of the paddle is 1-2 mm larger than the minimum width between the filter membrane wrinkle protrusions in the cylindrical cavity 21; so that the width of the paddle is slightly larger than the minimum width between the filter membrane wrinkle protrusions, which can exert more effective extrusion force on the filter membrane wrinkle protrusions, and at the same time generate vibration with slight deformation. The combined action of mechanical extrusion and vibration can more quickly remove the dust, especially fine dust particles, attached to the filter membrane wrinkle recesses outside the cylindrical cavity. At the same time, the impact force of the paddle on the filter membrane is moderate, and when the paddle contacts the filter membrane, it is only slightly extruded and poked, rather than excessive pressure, reducing the physical wear and tear on the filter membrane.

[0050] More preferably, the paddles 32 are symmetrically arranged on the rotating shaft 31 and are equally angularly spaced on the rotating shaft 31 with the rotating shaft 31 as the rotation axis.

[0051] In this embodiment, the paddles are symmetrically arranged and spaced on the rotating shaft, ensuring mechanical balance during rotation and avoiding vibration or deviation caused by excessive force on one side, thereby improving the stability and service life of the cleaning assembly. At the same time, the spaced arrangement of the paddles allows each paddle to contact the filter membrane wrinkle protrusion area in the cylindrical cavity during rotation, forming multiple alternating vibration cleaning effects, significantly improving the dust removal efficiency and making the cleaning process more uniform. For example, the number of paddles is 12, which are equally angularly spaced on the rotating shaft at an angle of 30 degrees with the rotating shaft as the rotation axis, and each paddle is symmetrically arranged on the rotating shaft. During rotation and dust removal, up to 24 filter membrane wrinkle protrusion areas can be contacted at the same time, greatly improving the dust removal efficiency and making the dust removal process more uniform and efficient.

[0052] Preferably, the paddle 32 is made of rubber material.

[0053] In this embodiment, the dial piece is made of rubber material. On the one hand, since rubber has certain elasticity and softness, when it contacts with the filter membrane folds, it will not generate excessive friction or scratching, and can apply moderate pressure and elastic vibration to the filter membrane folds, effectively loosen the dust accumulated at the outside of the cylindrical cavity and in the recessed part of the filter membrane folds, and compared with hard materials (such as metal or hard plastic), it can further reduce noise. On the other hand, compared with a brush, in addition to generating greater vibration, rubber is not prone to static electricity, so that when the filter membrane contacts with the dust, it will not adsorb the dust due to static electricity effect. Moreover, when dealing with flammable and explosive dust (such as metal dust, dust with oil), the anti-static performance of rubber can greatly reduce the accumulation of static electricity, avoid sparks or explosion caused by static electricity discharge, and greatly improve the safety of the industrial dust collector.

[0054] Preferably, referring to Figure 2 , the industrial dust collector further comprises a cylindrical blocking inner cylinder 5 arranged around the filter cylinder 2.

[0055] The blocking inner cylinder 5 is detachably connected to the box body 1 at the upper end and has an open structure at the lower end.

[0056] There is a gap between the blocking inner cylinder and the filter cylinder, forming an annular air duct.

[0057] In this embodiment, the cylindrical blocking inner cylinder arranged around the filter cylinder on the industrial dust collector can buffer the dust-containing airflow entering the dust collection barrel, avoid the dust directly impacting the filter cylinder, and reduce the mechanical wear of the filter membrane caused by high-speed airflow or large particle dust. When the dust-containing airflow contains sparks or sparks, it can avoid direct burning of the filter membrane by the sparks or sparks, greatly improving the service life of the filter membrane. In addition, the cylindrical blocking inner cylinder uses the cylindrical surface to buffer the dust-containing airflow, which can avoid the direct impact of high-speed dust-containing gas on the inside of the box body to generate noise. At the same time, it makes the dust-containing airflow entering the filter cylinder more evenly, and the dust-containing airflow enters the annular air duct below the blocking inner cylinder and flows to the surface of the filter cylinder in an orderly manner, which can greatly improve the filtering efficiency. The upper end of the blocking inner cylinder is detachably connected to the box body, which facilitates the operator to quickly disassemble, clean or inspect the filter cylinder, simplifies the maintenance process of the filter cylinder, and improves the maintainability of the equipment.

[0058] Preferably, referring to Figure 1 , the box body 1 is provided with a push rod 6 at the top; and an installation bottom plate 7 is arranged at the bottom of the box body.

[0059] The installation bottom plate is made of a bent thin plate and is provided with reinforcing ribs.

[0060] A universal rubber wheel 8 and a brake are arranged below the installation bottom plate 7.

[0061] In this embodiment, the installation floor is bent from a thin plate and is provided with reinforcing ribs, which significantly enhance the load-bearing capacity and anti-deformation performance of the floor, effectively supporting the weight of the box body and internal components; the push rod at the top of the box body provides a convenient gripping structure, which, in combination with the universal rubber wheels and brakes below the installation floor, enables the industrial vacuum cleaner to be quickly and flexibly adjusted or fixed in position, making it suitable for industrial vacuum cleaning scenarios that require frequent movement.

[0062] Preferably, referring to Figure 3 , the negative pressure assembly comprises: an explosion-proof motor 41 arranged above and an explosion-proof fan 42 arranged below;

[0063] The explosion-proof motor 41 and the explosion-proof fan 42 are provided with protective covers;

[0064] The protective covers are provided with heat sinks arranged at intervals.

[0065] In this embodiment, the explosion-proof motor and the explosion-proof fan can prevent the risk of dust explosion caused by sparks, motor overheating or other electrical faults. The protective cover physically isolates the explosion-proof motor and the explosion-proof fan from the outside world, avoiding damage to the negative pressure assembly caused by dust explosion, external impact, vibration or corrosive substances. The heat sinks arranged on the protective cover can prevent the explosion-proof motor and the explosion-proof fan from overheating in a high-load working environment, even igniting flammable and explosive dust, causing an explosion. In addition, the combination of the protective cover and the heat sink can further reduce vibration and noise, meeting the requirements of low-noise industrial scenarios.

[0066] More preferably, referring to Figures 1-3 , the negative pressure assembly 4 further comprises: a wind guide channel 43 connecting the cylindrical cavity 21, the explosion-proof fan 41 and the air outlet 13;

[0067] An acoustic damper is arranged in the wind guide channel 43 in the front section of the air outlet 13.

[0068] In this embodiment, the wind guide channel effectively connects the cylindrical cavity, the explosion-proof fan and the air outlet, forming a smooth airflow path, reducing airflow turbulence and loss in the pipeline and improving dust suction efficiency and filtration effect. The acoustic damper absorbs and attenuates the high-speed vibration and noise generated in the wind guide channel, significantly reducing the noise during equipment operation. At the same time, since the air outlet is arranged above the box body, it can further minimize the impact of noise, making the equipment run more quietly and meeting the requirements of low-noise operation in industrial places.

[0069] More preferably, the industrial vacuum cleaner further comprises: a pressure relief valve arranged at the air inlet 12;

[0070] The pressure relief valve is provided with a pressure relief hole.

[0071] In this embodiment, when the industrial dust collector finishes the dust collection work, the air inlet will be closed; at this time, the explosion-proof fan will continue to rotate due to inertia to generate negative pressure, and a large difference between the negative pressure and the external atmospheric pressure will be formed, which will cause the dust collection barrel to be deformed or damaged. A pressure relief valve is additionally arranged at the air inlet, and the pressure relief valve will automatically open the pressure relief hole to release the internal negative pressure and restore the internal and external air pressure balance when a preset negative pressure is generated, so that the dust collection barrel is prevented from being deformed or damaged due to a too large air pressure difference. At the same time, the pressure relief valve controls the negative pressure fluctuation, avoids vibration and noise caused by a too large air pressure difference, and further improves the stability of the equipment to ensure a quiet operation environment of the equipment. Specifically, the pressure relief valve is a spring type pressure relief valve, which comprises a valve body, a pressure relief hole arranged on the valve body, a valve core and an adjusting spring arranged in the valve body, and an adjusting nut connected with the adjusting spring; the adjusting nut is used for adjusting the pressure of the spring, changing the threshold value of the opening of the pressure relief valve, and meeting different pressure setting requirements; when the pressure in the system exceeds the set pressure of the adjusting spring, the spring is compressed, the valve core is opened, and the gas is discharged through the pressure relief hole until the pressure returns to the preset value. Once the internal and external air pressure is balanced, the adjusting spring will push the valve core back to the original position, the pressure relief valve is closed, and the airflow returns to normal. More preferably, a filter screen is arranged in the pressure relief hole to prevent dust and sundries from entering the pressure relief valve and the dust collection barrel, reduce the failure of the industrial dust collector, and prevent the dust in the dust collection barrel from being discharged into the external environment to avoid pollution of the external environment.

[0072] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. An industrial vacuum cleaner characterized in that, The utility model relates to a dust collector, comprising: a box, a filter cartridge, a cleaning assembly and a negative pressure assembly arranged in the box; the box comprises a dust collection barrel, an air inlet arranged in the dust collection barrel and an air outlet arranged at the top of the box; the filter cartridge is arranged in the dust collection barrel, the side wall is formed by a pleated filter membrane, and a cylindrical cavity isolated from a filter chamber is arranged in the filter cartridge; the cleaning assembly is rotatably arranged in the cylindrical cavity and in contact with the pleated convex part of the filter membrane; the negative pressure assembly is in communication with the cylindrical cavity at a first end and connected with the air outlet at a second end.

2. The industrial vacuum cleaner of claim 1, wherein, The cleaning assembly comprises a rotating shaft, a push piece arranged in the cylindrical cavity and a rotating handle rotatably arranged on the box; the first end of the rotating shaft penetrates the upper part of the box and is connected with the rotating handle; the second end of the rotating shaft extends into the cylindrical cavity and is connected with the push piece; the two sides of the push piece are in contact with the pleated convex part of the filter membrane.

3. The industrial vacuum cleaner of claim 2, wherein, The width of the push piece is 1-2mm larger than the minimum width between the pleated convex parts of the filter membrane in the cylindrical cavity.

4. The industrial vacuum cleaner of claim 2, wherein, The push pieces are symmetrically arranged on the rotating shaft and are arranged at intervals on the rotating shaft with the rotating shaft as the rotation center.

5. The industrial vacuum cleaner of claim 2, wherein, The push piece is made of rubber material.

6. The industrial vacuum cleaner of claim 1, wherein, Further comprising: a cylindrical blocking inner cylinder arranged around the filter cartridge; the blocking inner cylinder is detachably connected with the box at the upper end and has an open structure at the lower end; there is a gap between the blocking inner cylinder and the filter cartridge, forming an annular air duct.

7. The industrial vacuum cleaner of claim 1, wherein, A push rod is arranged at the top of the box, and a mounting bottom plate is arranged at the bottom of the box; the mounting bottom plate is formed by bending a thin plate and is provided with a reinforcing rib; a universal rubber wheel and a brake are arranged below the mounting bottom plate.

8. The industrial vacuum cleaner of claim 1, wherein, The negative pressure assembly comprises an explosion-proof motor arranged at the upper part and an explosion-proof fan arranged at the lower part; the explosion-proof motor and the explosion-proof fan are provided with a protective cover; heat dissipation fins are arranged at intervals on the protective cover.

9. The industrial vacuum cleaner of claim 8, wherein, The negative pressure assembly further comprises a wind guide channel connecting the cylindrical cavity, the explosion-proof fan and the air outlet; a silencer is arranged in the wind guide channel in front of the air outlet.

10. The industrial vacuum cleaner of claim 8, wherein, Further comprising: a pressure relief valve arranged at the air inlet; a pressure relief hole is arranged on the pressure relief valve.

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