Multipurpose industrial dust collector

Abstract

A multipurpose industrial dust collector comprises a dust collector body and a dust collecting box, the dust collecting box is mounted below the dust collector body, the cyclone separation dust collector is provided with at least two cyclone cylinders, each cyclone cylinder comprises an upper cylindrical cover body and a lower conical cylinder, and the lower end of each cylindrical cover body is fixedly connected with the upper end of the corresponding conical cylinder; an air inlet is formed in the circumferential side of the cylindrical cover body in the tangential direction, and an air outlet is formed in the top of the cylindrical cover body; a check valve is mounted on the inner side of a lower port of the conical cylinder, a dust falling port is formed between the check valve and the lower port of the conical cylinder and hermetically communicated with an inner cavity of the dust collecting box, and the check valve is fixedly connected with the conical cylinder; the air outlets and the air inlets of the multiple sets of cyclones are communicated in a sealed mode, the air inlet of the first set of cyclone serves as an external airflow inlet, and the air outlet of the tail set of cyclone is communicated with the air inlet of the electric fan. The multi-stage cyclone dust collector is wide in application, backflow blocking, multi-stage cyclone separation and filtering mechanism integration are equally combined for floating dust through the check valve, the height of the dust collector body is reduced, and the dust collection efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of vacuum cleaner technology, and relates to the structural and performance improvements of separation devices for substances such as gas and dust, and particularly to a multi-purpose industrial vacuum cleaner. Background Technology

[0002] Vacuum cleaners are common cleaning appliances. Based on their application, they can be divided into two categories: household vacuum cleaners and industrial vacuum cleaners. Household vacuum cleaners are mainly used for cleaning living and office environments. They are typically smaller in size and handle less dust, generally using a filter structure to separate airflow and dust. Industrial vacuum cleaners are mostly used for cleaning dust and debris in decoration, renovation, and manufacturing processes. They are typically larger in size, handle more dust and debris, and have longer continuous operating times. They generally use a centrifugal separation structure to separate airflow and dust. The separation structures of these two types of vacuum cleaners are not strictly limited or differentiated; in actual products, there are also structures and solutions that combine the two.

[0003] Industrial vacuum cleaners mainly consist of a vacuum cleaner body and a dust collection device. The vacuum cleaner body housing includes a cyclone separator, motor, centrifugal impeller, and filter. The cyclone separator is a commonly used structure for separating gas and dust in vacuuming. During operation, the airflow is tangentially introduced to create rotational motion. The centrifugal force generated by this rotation causes denser dust particles to be thrown outwards against the cylinder wall, sliding down the wall and exiting through the lower dust outlet. For example, the invention patent CN101049221A discloses a "cyclone separator device for a vacuum cleaner," which includes a cyclone cylinder with an airflow inlet and an airflow outlet. The inner cavity of the cyclone cylinder forms a cyclone separation chamber. The airflow flowing in from the inlet rotates downwards along the cylinder wall, forming an outer vortex. After reaching the conical bottom of the cyclone cylinder, the outer vortex turns upwards and flows towards the airflow outlet, forming an inner airflow or vortex. As can be seen from the structure and working process of the cyclone separator described above, the key to separating gas and particulate matter such as dust is to utilize the centrifugal effect of the rotating airflow and the density difference between gas and dust.

[0004] To ensure separation efficiency, the height of existing cyclone separators is generally 2-3 times their maximum diameter. This ensures a sufficient height difference between the falling dust and the airflow outlet, preventing dust from being carried back and sucked out. A taller cyclone structure, on the one hand, occupies more space in the equipment layout, making the overall vacuum cleaner larger and less convenient to carry and use; on the other hand, it also increases costs, affecting product promotion and competitiveness. Furthermore, dust falling from the outlet, once deprived of centrifugal force, instantly forms a large amount of floating dust that rises upwards, easily carried by the inner airflow and overflowing from the outlet, thus reducing separation and suction efficiency.

[0005] In the interior decoration industry, walls and ceilings require putty to fill unevenness, holes, and other defects, providing a smooth base for subsequent painting or wallpapering. After the putty is applied and leveled, sanding with a sander generates a large amount of plaster dust, which affects the environment and human health. Therefore, a vacuum cleaner is essential to pair with the sander. However, this dust easily adheres to the filter, clogging the filter's outlet pores. Frequent cleaning of the vacuum cleaner's filter components increases maintenance costs and reduces dust separation and filtration efficiency. Furthermore, dust entering the vacuum cleaner motor adheres to the fan blades, clogging the air vents and affecting the motor's lifespan and quality.

[0006] For example, the invention patent application CN114788661A discloses a "cyclone separation structure, cyclone separator, cyclone separation device, and vacuum cleaner." This cyclone separation structure includes a separation cone with a truncated conical rotating cavity. The upper end of the separation cone is a large cone end with a cutting inlet for allowing external air to enter. A baffle is provided at the lower part of the separation cone, and viewed from the central axis of the rotating cavity, the baffle is located outside the small port at the lower end of the separation cone. The baffle has a windward surface capable of receiving the rotating air, and the windward surface of the baffle extends downward beyond the edge of the small port of the separation cone. In this cyclone separation structure, a baffle is provided on the outer side of the lower part of the separation cone.

[0007] The vacuum cleaner disclosed in the above technical solution belongs to the category of household vacuum cleaners, according to paragraph

[0007] of its instruction manual and Figures 11-1 As shown in Figure 3, "the baffle is a component used to block dust discharged from the small port of the separation cone." "Dust is thrown outwards along the tangential direction of the small port under centrifugal force, and the baffle arranged outside the small port of the separation cone is precisely positioned on the path of the thrown dust. The dust is blocked by the baffle and slides down along the windward surface of the baffle, thereby achieving air-dust separation." That is, the baffle mainly serves to block and guide the dust when it is thrown out tangentially, but it still cannot solve the problem that dust falling from the dust outlet will form floating dust after losing centrifugal force.

[0008] In terms of dust separation efficiency, existing industrial vacuum cleaners still have shortcomings. The cyclone separator is relatively tall, which makes it inconvenient to arrange the structure of the vacuum cleaner, resulting in a large overall size that is not easy to carry and use. However, if the cyclone tube is too short, the dust separation and suction efficiency cannot be guaranteed. In fact, the height and size of the cyclone tube, as well as the structure of industrial vacuum cleaners, have not been effectively improved. Summary of the Invention

[0009] The purpose of this invention is to provide a multi-purpose industrial vacuum cleaner to solve the problems of large body height and volume and insufficient suction efficiency of existing vacuum cleaners.

[0010] To achieve the objectives of this invention, the following technical solution is adopted: A multi-purpose industrial vacuum cleaner includes a vacuum cleaner body and a dust collection box. An electric fan and a cyclone separator dust collector are fixedly installed inside the vacuum cleaner body. The dust collection box is detachably installed below the vacuum cleaner body. The cyclone separator dust collector is characterized by having at least two sets of cyclone tubes, with multiple sets of cyclone tubes arranged at intervals in a plane. Each cyclone tube includes an upper cylindrical cover and a lower conical tube. The conical tube has an inverted frustum-shaped structure, and the lower end of the cylindrical cover is fixedly connected to the upper end of the conical tube. An air inlet is provided tangentially on the circumferential side of the cylindrical cover. The cylindrical cover has an air outlet at its top; a check valve is installed inside the lower port of the cone to prevent dust from returning, and a dust collection port is formed between the check valve and the lower port of the cone. The dust collection port is sealed and connected to the inner cavity of the dust collection box, and the check valve is fixedly connected to the cone; the dust collection box has at least two-stage dust collection chambers that cooperate with multiple sets of cyclones; the air outlets and air inlets of the multiple sets of cyclones are sealed and connected, the air inlet of the first set of cyclones serves as the inlet for external airflow, and the air outlet of the last set of cyclones is connected to the air inlet of the electric fan.

[0011] To further achieve the objectives of this invention, the following technical solutions may also be adopted: As described above, in the multi-purpose industrial vacuum cleaner, the check valve is a cone, which is connected to the lower end of the cone cylinder via a U-shaped frame, and at least two sets of the U-shaped frame are provided at intervals along the circumference of the cone.

[0012] As described above, in the multi-purpose industrial vacuum cleaner, the height of the cone is 1.2-1.5 times the diameter of its upper port; the taper of the cone is between 20° and 30°.

[0013] As described above, in the multi-purpose industrial vacuum cleaner, the bottom diameter of the check valve is 0.45-0.55 times the diameter of the lower port of the cone; the height of the check valve inside the cone is 0.3-0.5 times the bottom diameter of the check valve; and the taper of the check valve is between 45° and 55°.

[0014] As described above, in the multi-purpose industrial vacuum cleaner, an air outlet pipe is installed inside the air outlet of the cyclone, with the lower end of the air outlet pipe located at 0.4-0.6 times the height of the cone. As described above, in the multi-purpose industrial vacuum cleaner, one or more sets of the cyclone separators after the first set form a cyclone separation and filtration integrated module with the filtration mechanism. The filtration mechanism includes a secondary dust collection box, in which an annular partition is installed to divide the inner cavity of the secondary dust collection box into an independent intermediate cavity and a filtration cavity. The filtration cavity is located on the outer periphery of the intermediate cavity. The lower part of the cyclone separator is located in the intermediate cavity. A detachable annular filter element is installed in the filtration cavity, which can divide the filtration cavity into an independent filtration inlet cavity and a filtration outlet cavity. The filtration inlet cavity is located on the outer periphery of the filtration outlet cavity and is connected to the air outlet of the cyclone separator. The filtration outlet cavity is connected to an external air duct or the air inlet of the subsequent cyclone separator.

[0015] As described above, in the multi-purpose industrial vacuum cleaner, the upper part of the secondary dust collection box is open, and a middle partition is sealed and installed above the open part. A filter chamber cover is installed on the middle partition. The outer periphery of the cyclone is sealed and fixed between the filter chamber cover and the outer periphery of the cyclone. The middle partition has an installation port that matches the outer periphery of the cyclone. The middle partition outside the installation port is provided with a filter exhaust port. The filter chamber cover has a cover exhaust port that communicates with the filter exhaust port.

[0016] As described above, in the multi-purpose industrial vacuum cleaner, the exhaust port of the filter chamber is an annular opening, which is opposite to the filter chamber below.

[0017] As described above, in the multi-purpose industrial vacuum cleaner, the middle partition has an air inlet for the filter air inlet chamber on the outer periphery of the filter chamber cover; the secondary dust collection box has a raised cavity in the filter air inlet chamber, which is located below the air inlet of the filter air inlet chamber.

[0018] As described above, in the multi-purpose industrial vacuum cleaner, the middle partition is fastened and installed on the integrated box, and the electric fan and multiple sets of cyclones are all installed on the middle partition; the air inlet of the electric fan and the air outlet of the cyclones at the tail are connected through an air duct, and the air outlet of the electric fan is connected to the discharge outlets on both sides of the vacuum cleaner body; a base with wheels is installed below the dust collection box.

[0019] The advantages of this invention are: 1. The cyclone separator dust collector of the present invention is provided with at least two sets of cyclone tubes. Under the suction of the electric fan, the gas containing dust enters the first-stage cyclone tube through the external suction pipe and enters the dust inlet for separation, so that a large amount of dust falls into the dust collection box below. Then, the gas containing a small amount of dust enters the second-stage and subsequent cyclone tubes through the pipe for further separation. After further separation, the amount of dust is further reduced.

[0020] Compared to existing cyclone separator structures and industrial vacuum cleaners, this invention, through a multi-stage centrifugal separation structure for dust-containing airflow combined with a check valve to suppress and block floating dust, improves suction efficiency by 1.5-2% compared to existing industrial vacuum cleaners. For grinding machines used continuously with large amounts of dust, its suction effect and function are particularly significant. Taking the first cyclone separator separating 80L of dust as an example, the two-stage separation improves efficiency by 2%, reducing the amount of dust by 1.6L and the weight by approximately 2-5 kg. More importantly, it prevents this dust from entering the electric fan, filter, and ductwork, thereby significantly extending the motor's lifespan and reducing the time and cost of cleaning and maintaining the filter and ductwork.

[0021] 2. Traditional cyclone separators require the cyclone separator's cyclone tube to be 2-3 times its maximum diameter to ensure a sufficient height difference between the falling dust and the outlet, preventing dust from being sucked out. This invention features a check valve installed at the lower end of the cyclone tube, effectively preventing floating dust from returning while ensuring unobstructed dust descent. The check valve is positioned inside the cone, ensuring effective dust descent without turbulence on the backflowing gas at the cyclone center. The improved cone allows the height to be controlled at 1.2-1.5 times the maximum diameter, significantly reducing the installation space and volume of the cyclone tube and vacuum cleaner, thus lowering costs. Furthermore, its combination with the conical check valve effectively prevents floating dust from returning to the tube, improving dust separation efficiency.

[0022] 3. The cyclone cone of the present invention has a small taper, which enables the dust to rotate under the action of centrifugal force and not disperse as the airflow decreases towards the lower direction.

[0023] 4. In a multi-unit cyclone separator, at least one cyclone separator after the first unit should be integrated with the filtration mechanism into a single module. This module is placed vertically within the central chamber of the secondary dust collection box, which is divided into an independent and sealed central chamber and filtration chamber by an annular partition. The central chamber is located in the middle of the filtration chamber, where filter elements can be placed. These filter elements can then be arranged around the outer perimeter of the cyclone separator, integrating the filtration mechanism and cyclone separator into a single module. This reduces the required height of the cyclone separator and filtration mechanism, improving space utilization. 5. This invention has a wide range of applications. When used in conjunction with a sander, it can significantly improve the cleaning of dust generated during the sanding of walls and roofs. In addition, it can also be used as a vacuum cleaner for power tools such as miter saws and hand saws. This invention is convenient to move, transport, and carry. Structurally, the vacuum cleaner body and dust collection box are detachably installed, one above the other. The bottom of the dust collection box can be equipped with casters, a mobile base, or a matching folding trailer. Other equipment can also be mounted on top of the vacuum cleaner body, forming a stack, and connected and secured using a pre-designed locking structure. Therefore, it is more convenient and efficient for transporting and carrying multiple tools. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0025] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 The main view; Figure 3 yes Figure 2 Sectional view along axis AA; Figure 4 yes Figure 2 Side view; Figure 5 yes Figure 4 BB-direction sectional view; Figure 6 yes Figure 2 A perspective view of the cyclone and the partition plate described in the text; Figure 7 yes Figure 6 The main view; Figure 8 yes Figure 7 CC-direction sectional view; Figure 9 yes Figure 8 Exploded view of the cyclone separation and filtration integrated module described above; Figure 10 yes Figure 9 3D image Figure 11 yes Figure 1 An enlarged structural diagram of the cyclone tube described in the figure; Figure 12 yes Figure 11 DD section view.

[0026] Figure label: 1-Vacuum cleaner body, 11-Suction port, 12-Exhaust port, 13-Electric fan, 14-Connecting pipe, 15-Air duct; 2a-First-stage cyclone, 2b-Second-stage cyclone, 21-Cylindrical cover, 22-Outlet pipe, 23-Inlet pipe, 24-Flange structure, 25-Cone, 26-Cone, 27-U-shaped frame, 28-Dust collection port; 3-Filter chamber cover, 31-Cavity cover exhaust port; 4-Partition plate, 41-Installation port, 42-Exhaust port of filter outlet chamber, 43-Inlet port of filter inlet chamber; 5-Filter element; 6-Secondary dust collection box, 61-Annular partition, 62-Intermediate cavity, 63-Filter cavity, 64-Protruding cavity; 7-Dust collection box; 8-Base; 9-Roller. Detailed Implementation To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0027] In the description of the embodiments of this invention, unless otherwise explicitly limited, terms such as setting, installing, and connecting should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution. It should be noted that the terms "dust," "powder," and "dust debris" used in this embodiment refer to impurities that need to be separated during the dust collection process when mixed with gas. These terms can generally be understood in the same way and can be substituted for each other in the description of this embodiment. However, due to different locations where they occur, the composition, particle size, and formation process of the specific impurities may differ.

[0028] like Figures 1-12 As shown, this embodiment discloses a multi-purpose industrial vacuum cleaner, including a vacuum cleaner body 1 and a detachable dust collection box 7 located below the vacuum cleaner body 1.

[0029] In terms of overall structure, this multi-purpose industrial vacuum cleaner adopts a stacked arrangement, with the dust collection box 7 fixed on the base 8. Four sets of omnidirectional casters 9 can be installed under the base 8, or the base 8 can be equipped with a folding trailer for easy movement, handling, and carrying. Other tools can also be stacked on top of the vacuum cleaner body 1 and connected and secured using a pre-installed locking mechanism. Therefore, it is more convenient and efficient for transporting and carrying multiple tools.

[0030] In terms of application, this industrial vacuum cleaner has a variety of uses. When used with a grinder, it can significantly improve the cleaning of dust generated during the grinding of walls and roofs; in addition, it can also be used as a vacuum cleaner for power tools such as miter saws and hand saws, thus greatly expanding its applicability.

[0031] The vacuum cleaner body 1 includes a housing shell, inside which are installed components such as a cyclone separator dust collector, an electric fan 13 consisting of a motor and an impeller, a connecting pipe 14, and an air duct 15. On the housing shell, there is a suction port 11 for dust airflow to enter and an exhaust port 12 for the gas to be separated and filtered.

[0032] The cyclone separator dust collector separates gas from dust and debris in the suction airflow. Its structure and performance are key factors affecting suction efficiency. An electric fan 13, consisting of a motor and impeller, provides suction for the dust-laden airflow to enter the vacuum cleaner body through the suction port 11. The electric fan 13 then discharges the separated clean gas through the air duct 15 from the exhaust port 12. The connecting pipe 14 is mainly used for sealing the inlet and outlet of multiple cyclone separators.

[0033] like Figure 3 , Figure 5 , Figure 11 , Figure 12 As shown, the cyclone separator dust collector of this embodiment includes two sets of cyclones, namely a primary cyclone 2a and a secondary cyclone 2b.

[0034] In existing technology, the cyclone separators used with grinding machines have relatively large cyclone sections, with the height of the section typically being 2-3 times its maximum diameter. This is to ensure a sufficient height difference between the falling dust and the airflow outlet, preventing dust from being carried back and sucked out. Furthermore, even when multi-stage cyclones are used, they are arranged vertically with varying heights, rather than at intervals in a plane, which further increases the size of the vacuum cleaner.

[0035] In this embodiment, two sets of cyclones are arranged at intervals on the partition plate 4. The air outlet and air inlet between the two sets of cyclones are sealed and connected by a connecting pipe 14. The air inlet of the first-stage cyclone 2a is connected to the dust suction port 11, serving as the inlet for external dust airflow, while the air outlet of the second-stage cyclone 2b serves as the airflow outlet for the cyclone separator dust collector.

[0036] Based on the above description, when the cyclone separator dust collector is equipped with two or more cyclone tubes, the air outlet and air inlet of each cyclone tube are sealed and connected. The air inlet of the first cyclone tube serves as the inlet of external airflow, and the air outlet of the last cyclone tube serves as the outlet of the cyclone separator dust collector.

[0037] See Figure 11 , Figure 12 As shown, specifically, the cyclone in this embodiment is composed of an upper cylindrical cover 21 and a lower conical tube 25, with the cylindrical cover 21 and the conical tube 25 having the same vertical axis.

[0038] The cyclone separator can be manufactured as a single piece, or it can be assembled from two separate parts: a cylindrical cover 21 and a conical tube 25. The cylindrical cover 21 is fastened to the upper end of the conical tube 25 to form a sealed connection.

[0039] In this embodiment, a flange structure 24 is used for connection. The flange structure 24 includes a lower boss on the outer side of the lower end of the cylindrical cover 21 and an upper boss on the outer side of the upper end of the cone 25. The upper boss and the lower boss have a snap-fit ​​structure or are connected by bolts.

[0040] An air inlet is provided on the circumferential side of the cylindrical cover 21 along the tangential direction. The air inlet serves as the entry point for the dust-collecting airflow, guiding the airflow drawn in from the dust-collecting port 11 into the cyclone, and forming a rotating airflow to centrifugally separate dust and gas.

[0041] An air inlet pipe 23 is installed inside the air inlet of the cylindrical cover 21, and an air outlet is provided at the top, located on the axis of the cylindrical cover 21. For convenient connection to external pipes, an air outlet pipe 22 is installed on the air outlet. Simultaneously, to prevent the exhaust airflow from mixing with the dust-laden rotating airflow, which would cause dust to overflow from the air outlet and reduce dust separation and suction efficiency, the lower end of the air outlet pipe 22 extends into the inner cavity of the cone 25 to serve as a guide. In this embodiment, the lower end of the vent pipe 22 is located at a height of 0.4-0.6 times that of the cone 25.

[0042] like Figure 5 , Figure 9 , Figure 11 As shown, the cone 25 in this embodiment is an inverted frustum. In this structure, the upper port of the cone 25 is the large port and the lower port is the small port.

[0043] The height of cone 25 is 1.2-1.5 times the diameter of its upper port; the taper of cone 25 is between 20° and 30°. The relatively small taper of cone 25 ensures that the dust particles rotate under the action of centrifugal force and do not disperse as the centrifugal force weakens as the airflow descends.

[0044] By setting the height and taper of the cone 25 as described above, the installation space and volume of the cyclone separator and vacuum cleaner are significantly reduced, thus lowering costs. Especially when a multi-stage cyclone separator is installed, the size of the vacuum cleaner can be effectively reduced.

[0045] Compared to traditional cyclone separators, the cyclone separator of this invention is only half the height of a traditional cyclone separator, thus achieving better dust collection efficiency.

[0046] like Figure 11 , Figure 12As shown, in this embodiment, a check valve for preventing dust from returning is installed at the lower port of the cone 25. A dust outlet 28 is provided between the outer side of the check valve and the lower port of the cone 25. The check valve is connected and fixed to the cone 25, and the upper part of the check valve is located inside the cone 25.

[0047] In existing cyclone separators, the lower outlet, serving as the dust collection port 28, is either open or directly connected to the dust collection box. Therefore, when the dust loses its centrifugal force and is subjected to the airflow, it floats and flows back. This invention addresses this by incorporating a check valve at the bottom of the cone 25, effectively preventing the floating dust from returning to the container and improving dust separation efficiency.

[0048] See also Figure 11 , Figure 12 As shown, the check valve in this embodiment includes a cone 26, which is connected to the lower end of the cone cylinder 25 via a U-shaped bracket 27. At least two sets of U-shaped brackets 27 are provided at intervals along the circumference of the cone 26.

[0049] The bottom diameter of the check valve is 0.45-0.55 times the diameter of the lower port of the cone 25, so that the area of ​​the dust outlet 28 is at least more than half of the area of ​​the lower port of the cone 25, which ensures that the dust falls without being blocked and effectively prevents floating dust from returning to the barrel.

[0050] The check valve is located at a height of 0.3-0.5 times the bottom diameter of the check valve within the cone 25, which ensures effective dust settling and does not cause turbulence to the exhaust airflow at the center of the cyclone.

[0051] The taper of the check valve is between 45° and 55°, which ensures that dust falling is not blocked.

[0052] like Figures 6-10 As shown, in order to further reduce the height and volume of the vacuum cleaner, this embodiment sets up a filter mechanism independently in one or more sets of the cyclone after the first set, and integrates the cyclone and the filter mechanism into a cyclone separation filter integrated module.

[0053] The lower part of the cyclone separator filter integrated module is vertically arranged in the intermediate cavity 62 of the secondary dust collection box 6. An annular partition 61 is installed inside the secondary dust collection box 6, which divides the inner cavity of the secondary dust collection box 6 into an independent intermediate cavity 62 and a filter cavity 63. The filter cavity 63 is located on the outer periphery of the intermediate cavity 62.

[0054] A removable annular filter element 5 is installed inside the filter chamber 63. The annular filter element 5 can divide the filter chamber 63 into an independent filter inlet chamber and a filter outlet chamber. The filter inlet chamber is located on the outer periphery of the filter outlet chamber.

[0055] The filter inlet chamber is connected to the air outlet pipe 22 of the cyclone separator, and the filter outlet chamber is connected to the external air duct 15 or the air inlet of the rear cyclone separator.

[0056] In use, the air inlet pipe 23 on the cyclone separator serves as the inlet for the dust-laden airflow. After the dust-laden airflow enters the cyclone separator, it is separated by the cyclone separator, and the dust falls into the intermediate chamber 62 of the secondary dust collection box 6. The air containing trace amounts of dust is discharged from the outlet pipe 22 at the top of the cyclone separator and enters the filter inlet chamber of the secondary dust collection box 6 through the connecting pipe 14. Then it is filtered by the filter element 5, and the dust is blocked by the filter element 5. The clean air enters the filter outlet chamber and is then discharged from the filter outlet chamber. It is then sent to the air inlet of the electric fan 13 through the pipe or air duct 15, and then discharged from the exhaust port of the electric fan 13, or sent to the next set of cyclone separators for cyclone separation again.

[0057] The cyclone separator is placed vertically within the intermediate cavity 62 of the secondary dust collection box 6. The secondary dust collection box 6 is divided into an independent and sealed intermediate cavity 62 and a filter cavity 63 by an annular partition 61. The intermediate cavity 62 is located in the middle of the filter cavity 63. The filter element 5 can be placed in the filter cavity 63, allowing the filter element 5 to be arranged around the outer periphery of the cyclone separator. This integrates the filtration mechanism and the cyclone separator into a single module, thereby reducing the required height of the cyclone separator and the filtration mechanism and improving space utilization.

[0058] like Figure 9 , Figure 10 As shown, the upper part of the secondary dust collection box 6 in this embodiment is open, and a middle partition 4 is sealed and installed above the open part. A filter chamber cover 3 is installed on the middle partition 4. The outer periphery of the cyclone is sealed and fixed between the filter chamber cover 3 and the middle partition 4. The middle partition 4 has an installation port 41 that matches the outer periphery of the cyclone. The middle partition 4 outside the installation port 41 is provided with a filter outlet 42. The filter chamber cover 3 has a cover exhaust port 31 that communicates with the filter outlet.

[0059] The upper sealing plate of the secondary dust collection box 6 is formed by the partition plate 4, which, together with the filter chamber cover 3, optimizes the exhaust space and channel structure of the filter chamber, reduces resistance, and facilitates the discharge of air from the filter chamber.

[0060] like Figure 8 , Figure 10 As shown, in this embodiment, the exhaust port 42 of the filtered air outlet chamber is an annular opening, which is opposite to the filtered air outlet chamber below. The annular opening increases the flow cross-section of the air outlet channel of the filtered air outlet chamber, and the annular opening is located directly above the filtered air outlet chamber.

[0061] like Figure 3 , Figure 8 As shown, in this embodiment, the partition 4 has an air inlet 43 for the filter chamber on the outer periphery of the filter chamber cover 3. The filter chamber is connected to the air outlet pipe 22 of the cyclone separator through the air inlet 43. The secondary dust collection box 6 has a raised cavity 64 in the filter chamber area, which is located below the air inlet 43 of the filter chamber.

[0062] The cyclone separator's outlet pipe 22 is connected to the filter inlet 43 on the partition plate 4 via a pipe. The secondary dust collection box 6 has a raised cavity 64 located below the filter inlet 43. This design further simplifies the gas flow path of the cyclone separation and filtration integrated module, optimizing its size and structure.

[0063] Based on the above technical solution of this embodiment, the secondary dust collection box 6 of this embodiment has a ring-within-a-ring structure. After the secondary dust collection box 6 is assembled onto the middle partition 4, it is divided into two independent cavities through this structure, namely the intermediate cavity 62 and the filter cavity 63. The filter element 5 and the working space of the cyclone are sealed and isolated by the cooperation of the annular partition 61 and the middle partition 4. The dust gas filtered by the cyclone passes through the cavity formed by the secondary dust collection box 6 and the middle partition 4, and is discharged from the exhaust port 42 of the filtered gas outlet cavity. It then enters the cavity composed of the filter cavity cover 3 and the middle partition 4, and is discharged through the cavity cover exhaust port 31 or introduced into a designated flow channel.

[0064] During installation, the cyclone separator is vertically fixed to the center of the filter chamber cover 3 with screws. The filter chamber cover 3 is then fixed to the partition plate 4 with screws. The secondary dust collection box 6 is placed inside the lower chamber. After the assembled partition plate 4 is placed on the lower chamber, the secondary dust collection box 6 comes into contact with the partition plate 4, and a seal is achieved between them through a sealing strip. Sealing between the secondary dust collection box 6 and the partition plate 4, and between the partition plate 4 and the filter chamber cover 3, is achieved through methods such as sealing strip compression.

[0065] The aforementioned housing, cyclone separator, check valve, and secondary dust collection box 6 can be made of engineering plastics or alloy plates to achieve better wear resistance and high strength performance.

[0066] like Figure 1 , Figure 2 , Figure 4 As shown, in this embodiment, the dust collection box 7 is located below the vacuum cleaner body 1, and the two are connected by a partition 4, a locking structure, etc. To facilitate observation of the amount of dust, powder, or dust particles collected in the dust collection box 7, an observation window can be provided on the wall of the dust collection box 7.

[0067] In this embodiment, the dust collection box 7 is provided with a primary dust collection chamber and a secondary dust collection chamber. The primary dust collection chamber can be directly constructed using the inner cavity of the dust collection box 7, and the primary dust collection chamber is sealed and connected to the dust outlet 28 of the primary cyclone 2a. The secondary dust collection chamber is composed of a secondary dust collection box 6, which is independent and sealed from the primary integrated chamber.

[0068] When this multi-purpose industrial vacuum cleaner is in use, the airflow containing dust is drawn into the primary cyclone 2a through the external suction pipe and the suction port 11 of the vacuum cleaner by the impeller suction force of the electric fan 13. After separation by the primary cyclone 2a, a large amount of dust falls into the primary dust collection chamber of the dust collection box 7 below. Then, the gas containing a small amount of dust enters the secondary cyclone 2b through the connecting pipe 14 for further separation. After further filtration and separation by the secondary cyclone 2b and the filter element 5, the amount of dust in the airflow is further reduced. Under the suction force of the electric fan 13, the cleaner gas enters the electric fan 13 from the exhaust port 42 of the filtered air chamber and the air duct 15. Then it is discharged from the exhaust port 12 of the vacuum cleaner body 1, completing the entire process of airflow separation and filtration.

[0069] Compared to existing cyclone separators and industrial vacuum cleaner structures, the cyclone dust inlet 28 check valve of this invention can efficiently block the backflow of floating dust. Simultaneously, the combination of multi-stage cyclone separation and integrated filtration mechanisms improves suction efficiency by 1.5-2% compared to existing industrial vacuum cleaners. Its suction effect and function are particularly significant for vacuum cleaners used continuously with large amounts of dust, such as those for grinding machines.

[0070] Taking the separation of 80L of dust by the primary cyclone separator 2a as an example, the efficiency is increased by 2% after two-stage separation, which can reduce the amount of dust by 1.6L and the weight by about 2-5 kg. In particular, it can prevent this part of the dust from entering the electric fan 13, filter element 5, air duct 15 and other components and devices, thereby increasing the service life of the electric fan 13 and reducing the cleaning and maintenance time and cost of filter element 5 and air duct 15.

[0071] All technical contents not described in detail in this invention are publicly known technologies.

Claims

1. A multi-purpose industrial vacuum cleaner, comprising a vacuum cleaner body and a dust collection box, wherein an electric fan and a cyclone separator dust collector are fixedly installed inside the vacuum cleaner body, and the dust collection box is detachably installed below the vacuum cleaner body, characterized in that, The cyclone separator dust collector is provided with at least two sets of cyclone tubes, which are arranged at intervals in a plane. Each cyclone tube includes an upper cylindrical cover and a lower conical tube. The conical tube has an inverted frustum structure, and the lower end of the cylindrical cover is fixedly connected to the upper end of the conical tube. An air inlet is provided on the circumferential side of the cylindrical cover along the tangential direction, and an air outlet is provided on the top of the cylindrical cover. A check valve for preventing dust from returning is installed on the inner side of the lower port of the conical tube. A dust collection port is formed between the check valve and the lower port of the conical tube. The dust collection port is sealed and connected to the inner cavity of the dust collection box. The check valve is fixedly connected to the conical tube. The dust collection box is provided with at least two-stage dust collection chambers that cooperate with the multiple sets of cyclone tubes. The air outlets and air inlets of the multiple sets of cyclone tubes are sealed and connected. The air inlet of the first set of cyclone tubes serves as the inlet for external airflow, and the air outlet of the last set of cyclone tubes is connected to the air inlet of the electric fan.

2. The multi-purpose industrial vacuum cleaner according to claim 1, characterized in that, The check valve is a cone, which is connected to the lower end of the cone cylinder by a U-shaped frame. At least two sets of the U-shaped frame are provided at intervals along the circumference of the cone.

3. The multi-purpose industrial vacuum cleaner according to claim 1, characterized in that, The height of the cone is 1.2-1.5 times the diameter of its upper port; the taper of the cone is between 20° and 30°.

4. The multi-purpose industrial vacuum cleaner according to claim 1, characterized in that, The bottom diameter of the check valve is 0.45-0.55 times the diameter of the lower port of the cone; the height of the check valve inside the cone is 0.3-0.5 times the bottom diameter of the check valve; the taper of the check valve is between 45° and 55°.

5. The multi-purpose industrial vacuum cleaner according to claim 1, characterized in that, An air outlet pipe is installed inside the air outlet of the cyclone, with the lower end of the air outlet pipe located at 0.4-0.6 times the height of the cone.

6. The multi-purpose industrial vacuum cleaner according to claim 1, characterized in that, One or more sets of the cyclone separators after the first set form a cyclone separation and filtration integrated module with the filtration mechanism; the filtration mechanism includes a secondary dust collection box, in which an annular partition is installed to divide the inner cavity of the secondary dust collection box into an independent intermediate cavity and a filtration cavity, with the filtration cavity located on the outer periphery of the intermediate cavity; the lower part of the cyclone separator is located in the intermediate cavity; a detachable annular filter element is installed in the filtration cavity, which can divide the filtration cavity into an independent filtration inlet cavity and a filtration outlet cavity, with the filtration inlet cavity located on the outer periphery of the filtration outlet cavity, the filtration inlet cavity communicating with the air outlet of the cyclone separator, and the filtration outlet cavity communicating with the external air duct or the air inlet of the subsequent cyclone separator.

7. The multi-purpose industrial vacuum cleaner according to claim 6, characterized in that, The secondary dust collection box has an open top, and a middle partition is sealed and installed above the open top. A filter chamber cover is installed on the middle partition. The outer periphery of the cyclone is sealed and fixed between the filter chamber cover and the outer periphery of the cyclone. The middle partition has an installation port that matches the outer periphery of the cyclone. The middle partition outside the installation port has an exhaust port for the filter outlet chamber. The filter chamber cover has an exhaust port that communicates with the filter outlet chamber.

8. The multi-purpose industrial vacuum cleaner according to claim 7, characterized in that, The exhaust port of the filtered air chamber is an annular opening, which is opposite to the filtered air chamber below.

9. The multi-purpose industrial vacuum cleaner according to claim 7, characterized in that, The partition plate has an air inlet for the filter chamber on the outer periphery of the filter chamber cover; the secondary dust collection box has a raised cavity in the filter chamber area, which is located below the air inlet of the filter chamber.

10. The multi-purpose industrial vacuum cleaner according to claim 7, characterized in that, The middle partition is fastened and installed on the integrated box, and the electric fan and multiple sets of cyclone separators are all installed on the middle partition; the air inlet of the electric fan and the air outlet of the tail set of the cyclone separators are connected through an air duct, and the air outlet of the electric fan is connected to the exhaust ports on both sides of the vacuum cleaner body; a base with rollers is installed below the dust collection box.

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