Airflow pulverization system

Abstract

The utility model relates to an airflow crushing system, and belongs to the technical field of battery production, the airflow crushing system comprises a feeding hopper, a feeding device, an airflow crushing device, a cyclone collector, a dust remover and an induced draft fan which are connected in sequence, the airflow crushing device comprises a shell, a plurality of nozzles, a grading wheel, a first rotating motor and a cleaning assembly, the nozzle is used for conveying high-pressure airflow into the shell, the grading wheel is rotatably arranged in the shell, the first rotating motor is used for driving the grading wheel to rotate, and the cleaning assembly is arranged on the inner wall face of the shell and used for cleaning materials on the grading wheel in the rotating process of the grading wheel. According to the airflow crushing system provided by the invention, the cleaning assembly in the airflow crushing device can clean materials on the grading wheel in the rotation process of the grading wheel, so that the possibility of blockage of the grading wheel is reduced, the service life of the grading wheel is prolonged, and the use stability of the airflow crushing device is effectively ensured.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to an airflow crushing system. Background Art

[0002] At present, the mainstream process of dry electrodes uses PTFE (Polytetrafluoroethylene, fiberized polytetrafluoroethylene) as a binder. The shear modulus of PTFE is relatively low. The industry usually uses air flow mills or air flow grinders to fibrillate PTFE under the action of strong shear force.

[0003] The operating principle of a PTFE fiberizing jet mill is as follows: Compressed air, after being filtered and dried, is injected at high speed into the pulverizing chamber through a Laval nozzle. At the intersection of multiple high-pressure airflows, the PTFE-containing material is repeatedly collided, rubbed, mixed, sheared, and pulverized, forming PTFE fibers. The pulverized material, driven by the fan's suction, is carried along the rising airflow to the grading zone. The powerful centrifugal force generated by the high-speed rotating grading turbine separates the coarse and fine powders. Fine particles meeting the required size pass through the grading wheel and are collected in a cyclone separator and dust collector. The coarse powder, under its own weight, returns to the pulverizing chamber for further processing.

[0004] However, when the crushed fine-particle PTFE binder enters the cyclone separator through the classifying wheel, fine particles will adhere to the outer wall of the classifying wheel, causing the classifying wheel to be blocked, thereby affecting the normal use of the flow mill and reducing the service life of the classifying wheel. Utility Model Content

[0005] Based on this, it is necessary to provide an air flow pulverizing system to solve the technical problem in the prior art that the classifying wheel of the air flow pulverizer is easily blocked by materials.

[0006] To achieve the above-mentioned purpose, the present application provides an air flow pulverizing system, which includes a feeding hopper, a feeding device, an air flow pulverizing device, a cyclone collector, a dust collector and an induced draft fan connected in sequence. The material in the feeding hopper is transported to the air flow pulverizing device through the feeding device. The air flow pulverizing device includes a shell, multiple nozzles, a classifying wheel, a first rotating motor and a cleaning component. The nozzle is used to deliver high-pressure airflow into the shell. The classifying wheel is rotatably arranged in the shell. The first rotating motor is used to drive the classifying wheel to rotate. The cleaning component is arranged on the inner wall surface of the shell. The cleaning component is used to clean the material on the classifying wheel during the rotation of the classifying wheel.

[0007] Optionally, the cleaning component includes:

[0008] A mounting plate connected to the inner wall of the housing, wherein the length of the mounting plate is parallel to the axis of the classifying wheel; and

[0009] The bristles are arranged on the mounting plate, and the ends of the bristles are in contact with the grading wheel.

[0010] Optionally, the cleaning component further comprises:

[0011] A fixing plate, connected to the inner wall surface of the housing corresponding to the mounting plate; and

[0012] A plurality of elastic components are arranged on the fixed plate at intervals in sequence, and two ends of the elastic components are respectively connected to the mounting plate and the fixed plate. The elastic components are used to press the bristles onto the grading wheel.

[0013] Optionally, the elastic component includes:

[0014] A first guide cylinder is provided on the fixed plate;

[0015] a second guide cylinder, disposed on the mounting plate, the second guide cylinder being slidably inserted into the first guide cylinder; and

[0016] The compression spring has two ends respectively connected to the mounting plate and the fixing plate, and the two ends of the compression spring are respectively arranged in the first guide cylinder and the second guide cylinder.

[0017] Optionally, the cleaning component further comprises:

[0018] A sleeve is provided on the inner wall surface of the shell, and a slideway is formed on the sleeve;

[0019] A slide bar is arranged parallel to the mounting plate and spaced apart from the mounting plate, the slide bar being adapted to the slide rail; and

[0020] The connecting plate has two ends respectively connected to the end of the mounting plate and the end of the sliding rod.

[0021] Optionally, the feeding hopper includes:

[0022] The hopper body has a discharge port at the bottom;

[0023] A rotating shaft is arranged above the discharge port and rotatably passes through the hopper body;

[0024] a second rotating motor, disposed on the outer surface of the hopper body, the second rotating motor being connected to the rotating shaft; and

[0025] Multiple stirring rods are evenly distributed on the rotating shaft.

[0026] Optionally, the stirring rod is magnetic.

[0027] Optionally, the feeding hopper further comprises:

[0028] Two supporting plates are disposed opposite to each other on the inner wall surface of the hopper body, and the supporting plates are located below the rotating shaft; and

[0029] The screen is respectively placed on two supporting plates at both ends.

[0030] Optionally, the feeding hopper further comprises:

[0031] A plurality of return springs are respectively provided on the two bearing plates, with both ends of the return springs being connected to the bearing plates and the screen respectively; and

[0032] Two fan-shaped plates are fixed on the rotating shaft. The two fan-shaped plates correspond to the opposite ends of the screen respectively. The fan-shaped plates are used to press the screen to move downward.

[0033] Optionally, the shell includes an outer shell, an inner liner and sound insulation cotton that are sleeved together, a vacuum layer is arranged between the outer shell and the inner liner, the sound insulation cotton is arranged in the vacuum layer, and the sound insulation cotton is attached to the inner wall surface of the outer shell or the outer wall surface of the inner liner.

[0034] The beneficial effect of the air flow pulverizing system provided by the present application is that: compared with the prior art, the air flow pulverizing system of the present application includes a feeding hopper, a feeding device, an air flow pulverizing device, a cyclone collector, a dust collector and an induced draft fan connected in sequence, and the air flow pulverizing device includes a shell, multiple nozzles, a classifying wheel, a first rotating motor and a cleaning component. The nozzle is used to deliver high-pressure airflow into the shell, the classifying wheel is rotatably arranged in the shell, the first rotating motor is used to drive the classifying wheel to rotate, and the cleaning component is arranged on the inner wall surface of the shell. The cleaning component is used to clean the material on the classifying wheel during the rotation of the classifying wheel, thereby reducing the possibility of clogging of the classifying wheel, improving the service life of the classifying wheel, and effectively ensuring the stability of the use of the air flow pulverizing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 A schematic diagram of the three-dimensional structure of the airflow pulverization system provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the explosion structure of the airflow pulverizing device of the airflow pulverizing system provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the internal structure of the airflow pulverizing device of the airflow pulverizing system provided in an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the explosion structure of the airflow pulverizing device of the airflow pulverizing system provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of a partial cross-sectional structure of a housing of an airflow pulverizing system provided in an embodiment of the present application;

[0041] Figure 6 Schematic diagram of the internal structure of the feeding hopper of the air flow crushing system provided in the embodiment of the present application Figure 1 ;

[0042] Figure 7 Schematic diagram of the internal structure of the feeding hopper of the air flow crushing system provided in the embodiment of the present application Figure 2 .

[0043] Description of reference numerals:

[0044] 1. Hopper; 110. Hopper body; 111. Discharge port; 120. Rotating shaft; 130. Second rotating motor; 140. Stirring rod; 150. Loading plate; 160. Screen; 170. Return spring; 180. Sector plate;

[0045] 2. Feeding device;

[0046] 3. Airflow crushing device; 310. Shell; 311. Outer shell; 312. Inner liner; 313. Sound insulation cotton; 314. Vacuum layer; 320. Classifying wheel; 330. First rotating motor; 340. Cleaning assembly; 341. Mounting plate; 342. Bristles; 343. Fixing plate; 344. Elastic assembly; 3441. First guide cylinder; 3442. Second guide cylinder; 345. Sleeve; 3451. Slideway; 346. Slide rod; 347. Connecting plate;

[0047] 4. Cyclone collector; 5. Dust collector; 6. Induced draft fan. DETAILED DESCRIPTION

[0048] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0051] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0052] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0054] The embodiment of this application provides a jet crushing system, please refer to Figures 1 to 7 The air flow pulverizing system includes a feeding hopper 1, a feeding device 2, an air flow pulverizing device 3, a cyclone collector 4, a dust collector 5 and an induced draft fan 6 connected in sequence. The material in the feeding hopper 1 is transported to the air flow pulverizing device through the feeding device 2. The air flow pulverizing device 3 includes a shell 310, multiple nozzles, a classifying wheel 320, a first rotating motor 330 and a cleaning component 340. The nozzle is used to deliver high-pressure airflow into the shell 310. The classifying wheel 320 is rotatably arranged in the shell 310. The first rotating motor 330 is used to drive the classifying wheel 320 to rotate. The cleaning component 340 is arranged on the inner wall surface of the shell 310. The cleaning component 340 is used to clean the material on the classifying wheel 320 during the rotation of the classifying wheel 320.

[0055] In an embodiment of the present application, the air flow pulverizing system includes a feeding hopper 1, a feeding device 2, an air flow pulverizing device 3, a cyclone collector 4, a dust collector 5 and an induced draft fan 6 connected in sequence. The air flow pulverizing device 3 includes a shell 310, multiple nozzles, a classifying wheel 320, a first rotating motor 330 and a cleaning component 340. The nozzle is used to deliver high-pressure airflow into the shell 310. The classifying wheel 320 is rotatably arranged in the shell 310. The first rotating motor 330 is used to drive the classifying wheel 320 to rotate. The cleaning component 340 is arranged on the inner wall surface of the shell 310. The cleaning component 340 is used to clean the material on the classifying wheel 320 during the rotation of the classifying wheel 320, thereby reducing the possibility of clogging of the classifying wheel 320, improving the service life of the classifying wheel 320, and effectively ensuring the stability of the use of the air flow pulverizing device 3.

[0056] In one embodiment, the feeding device 2 is a screw feeding structure.

[0057] Illustratively, the material processed by the air flow pulverization system of the present application is PTFE (Polytetrafluoroethylene, fiberized polytetrafluoroethylene). PTFE is an adhesive for dry electrode production, and the air flow pulverization system performs fiberization treatment on PTFE.

[0058] It is understandable that in other embodiments, the air flow pulverization system of the present application can also process other substances according to actual needs, and this is not the only limitation here.

[0059] Specifically, the operating principle of the air flow pulverization system of the present application is as follows: First, the material enters the feed device 2 through the hopper 1 and is then pushed into the air flow pulverization device 3 by the screw in the feed device 2. Then, the compressed air, after being filtered and dried, is injected into the air flow pulverization device 3 at high speed through a Laval nozzle. The material is repeatedly collided, rubbed, and sheared at the intersection of multiple high-pressure airflows, thereby achieving the purpose of PTFE fiberization. The pulverized material is moved to the classification zone with the rising airflow under the suction of the fan. The classification wheel 320 can screen the pulverized material. Fine particles that meet the particle size requirements pass through the classification wheel 320 and enter the cyclone collector 4 and dust collector 5 for collection. The coarse material descends to the pulverization zone for further pulverization. Then, the cyclone collector 4 separates the material from the gas under the strong centrifugal force generated by the high-speed rotating classification turbine. The separated air enters the dust collector 5 through a pipe, and the bags in the dust collector 5 adsorb harmful substances in the gas. Finally, the gas that meets the emission requirements is discharged by the induced draft fan 6.

[0060] In one embodiment, please refer to Figure 3 and Figure 4 The cleaning assembly 340 includes a mounting plate 341 and bristles 342. The mounting plate 341 is connected to the inner wall surface of the shell 310. The length direction of the mounting plate 341 is parallel to the axial direction of the grading wheel 320. The bristles 342 are arranged on the mounting plate 341, and the ends of the bristles 342 are in contact with the grading wheel 320.

[0061] Specifically, the length of the bristles 342 is greater than the height of the grading wheel 320 to ensure a cleaning effect.

[0062] In one embodiment, please refer to Figure 3 and Figure 4 The cleaning component 340 also includes a fixing plate 343 and a plurality of elastic components 344. The fixing plate 343 is connected to the inner wall surface of the shell 310 corresponding to the mounting plate 341. The plurality of elastic components 344 are arranged on the fixing plate 343 in sequence. The two ends of the elastic component 344 are respectively connected to the mounting plate 341 and the fixing plate 343. The elastic component 344 is used to press the bristles 342 onto the grading wheel 320, increase the pressure between the bristles 342 and the grading wheel 320, and improve the cleaning effect of the bristles 342.

[0063] In one embodiment, please refer to Figure 3 and Figure 4The elastic component 344 includes a first guide cylinder 3441, a second guide cylinder 3442 and a compression spring. The first guide cylinder 3441 is arranged on the fixed plate 343, the second guide cylinder 3442 is arranged on the mounting plate 341, and the second guide cylinder 3442 is slidably inserted in the first guide cylinder 3441; the two ends of the compression spring are respectively connected to the mounting plate 341 and the fixed plate 343, and the two ends of the compression spring are respectively arranged in the first guide cylinder 3441 and the second guide cylinder 3442.

[0064] In this way, the first guide cylinder 3441 and the second guide cylinder 3442 cooperate with each other to guide and limit the deformation of the compression spring, ensuring that the bristles 342 can be stably pressed on the grading wheel 320.

[0065] In one embodiment, please refer to Figure 3 and Figure 4 The cleaning assembly 340 also includes a sleeve 345, a slide rod 346 and a connecting plate 347. The sleeve 345 is arranged on the inner wall surface of the shell 310. The sleeve 345 forms a slide 3451. The slide rod 346 is arranged parallel to the mounting plate 341 and spaced apart. The slide rod 346 is adapted to the slide 3451. The two ends of the connecting plate 347 are respectively connected to the end of the mounting plate 341 and the end of the slide rod 346.

[0066] In this way, through the mutual cooperation of the sleeve 345 and the slide rod 346, the mounting plate 341 and the bristles 342 can be quickly disassembled and assembled, reducing the difficulty of disassembly and assembly.

[0067] In one embodiment, please refer to Figure 6 and Figure 7 The hopper 1 includes a hopper body 110, a rotating shaft 120, a second rotating motor 130 and a plurality of stirring rods 140. A discharge port 111 is provided at the bottom of the hopper body 110, and the rotating shaft 120 is provided above the discharge port 111. The rotating shaft 120 rotatably passes through the hopper body 110. The second rotating motor 130 is provided on the outer surface of the hopper body 110. The second rotating motor 130 is connected to the rotating shaft 120, and a plurality of stirring rods 140 are evenly distributed on the rotating shaft 120.

[0068] Through the above arrangement, the second rotating motor 130 drives the rotating shaft 120 to rotate, and the stirring rod 140 on the rotating shaft 120 can stir the material in the hopper, first breaking up the agglomerated material, improving the uniformity of the material, and reducing the possibility of blockage of the discharge port 111.

[0069] In one embodiment, please refer to Figure 6 and Figure 7 The stirring rod 140 is magnetic, so that the stirring rod 140 can effectively absorb magnetic foreign matter in loose or fluid raw materials, thereby improving the purity of the materials.

[0070] In one embodiment, please refer to Figure 6 and Figure 7 The hopper 1 also includes two supporting plates 150 and a screen 160. The two supporting plates 150 are relatively arranged on the inner wall surface of the hopper body 110. The supporting plates 150 are below the rotating shaft 120. The two ends of the screen 160 are respectively placed on the two supporting plates 150. The screen 160 can block large pieces of material on its top surface to prevent large pieces of material from clogging the discharge port 111.

[0071] In one embodiment, please refer to Figure 6 and Figure 7 The hopper 1 also includes a plurality of return springs 170 and two fan-shaped plates 180. The plurality of return springs 170 are respectively arranged on the two supporting plates 150. The two ends of the return spring 170 are respectively connected to the supporting plate 150 and the screen 160; the two fan-shaped plates 180 are fixed on the rotating shaft 120. The two fan-shaped plates 180 correspond to the opposite ends of the screen 160, and the fan-shaped plates 180 are used to press the screen 160 to move downward.

[0072] Specifically, when the fan plate 180 rotates to the lower end, it will push the screen 160 to shrink downward. When the fan plate 180 rotates to the upper end, the screen 160 will bounce up and reset using the elastic force of the reset spring 170, causing the screen 160 to shake up and down, shaking off the fine powder attached to the top surface of the screen 160, and bouncing up the large pieces of material that have not been completely crushed, and crushing them again by the rotating stirring rod 140, effectively avoiding the clumping of materials and causing blockage of the discharge port 111, and preventing the agglomerated materials from entering the air flow crushing device 3 and reducing the crushing efficiency of the air flow crushing device 3.

[0073] In one embodiment, see Figure 5 The shell 310 includes an outer shell 311, an inner liner 312 and sound insulation cotton 313 which are arranged together. A vacuum layer 314 is arranged between the outer shell 311 and the inner liner 312. The sound insulation cotton 313 is arranged in the vacuum layer 314. The sound insulation cotton 313 is attached to the inner wall surface of the outer shell 311 or the outer wall surface of the inner liner 312. The vacuum layer 314 can isolate the noise generated by the airflow in the airflow crushing device 3, and the sound insulation cotton 313 can further isolate the noise, thereby realizing the noise reduction treatment of the airflow crushing device 3.

[0074] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A jet milling system, characterized in that: It includes a feeding hopper, a feeding device, an air flow crushing device, a cyclone collector, a dust collector and an induced draft fan connected in sequence. The material in the feeding hopper is transported to the air flow crushing device through the feeding device. The air flow crushing device includes a shell, multiple nozzles, a classifying wheel, a first rotating motor and a cleaning component. The nozzle is used to convey high-pressure airflow into the shell. The classifying wheel is rotatably arranged in the shell. The first rotating motor is used to drive the classifying wheel to rotate. The cleaning component is arranged on the inner wall surface of the shell. The cleaning component is used to clean the material on the classifying wheel during the rotation of the classifying wheel.

2. The air flow pulverization system according to claim 1, characterized in that: The cleaning component includes: a mounting plate connected to the inner wall surface of the housing, wherein the length direction of the mounting plate is parallel to the axial direction of the classifying wheel; and Brushes are arranged on the mounting plate, and ends of the brushes are in contact with the grading wheel.

3. The air flow pulverization system according to claim 2, characterized in that: The cleaning component also includes: a fixing plate, connected to the inner wall surface of the housing corresponding to the mounting plate; and A plurality of elastic components are arranged on the fixing plate at intervals in sequence, with two ends of the elastic components respectively connected to the mounting plate and the fixing plate, and the elastic components are used to press the bristles onto the grading wheel.

4. The air flow pulverization system according to claim 3, characterized in that: The elastic component comprises: A first guide cylinder is provided on the fixing plate; a second guide cylinder, disposed on the mounting plate, the second guide cylinder being slidably inserted into the first guide cylinder; and A compression spring, with two ends respectively connected to the mounting plate and the fixing plate, and two ends respectively arranged in the first guide cylinder and the second guide cylinder.

5. The air flow pulverization system according to claim 3, characterized in that: The cleaning component also includes: a sleeve, disposed on the inner wall surface of the shell, wherein the sleeve is formed with a slideway; a slide bar, arranged parallel to and spaced from the mounting plate, the slide bar being adapted to the slideway; and The connecting plate has two ends respectively connected to the end of the mounting plate and the end of the sliding rod.

6. The air flow pulverizing system according to any one of claims 1 to 5, characterized in that: The feeding hopper comprises: The hopper body has a discharge port at the bottom; A rotating shaft is provided above the discharge port, and the rotating shaft rotatably passes through the hopper body; a second rotating motor, disposed on an outer surface of the hopper body, the second rotating motor being connected to the rotating shaft; and A plurality of stirring rods are evenly distributed on the rotating shaft.

7. The air flow pulverization system according to claim 6, characterized in that: The stirring rod is magnetic.

8. The air flow pulverization system according to claim 6, characterized in that: The feeding hopper also includes: Two supporting plates are oppositely arranged on the inner wall surface of the hopper body, and the supporting plates are located below the rotating shaft; and The two ends of the screen are respectively placed on the two supporting plates.

9. The air flow pulverization system according to claim 8, characterized in that: The feeding hopper also includes: a plurality of return springs, each of which is provided on the two supporting plates, with both ends of the return spring being connected to the supporting plates and the screen respectively; and Two fan-shaped plates are fixed on the rotating shaft, and the two fan-shaped plates correspond to the opposite ends of the screen respectively. The fan-shaped plates are used to press the screen to move downward.

10. The air flow pulverizing system according to any one of claims 1 to 5, characterized in that: The shell includes an outer shell, an inner liner and sound insulation cotton that are sleeved together. A vacuum layer is provided between the outer shell and the inner liner. The sound insulation cotton is provided in the vacuum layer. The sound insulation cotton is attached to the inner wall surface of the outer shell or the outer wall surface of the inner liner.

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