Front-end purification device of central dust collection system

Abstract

The utility model belongs to the technical field of central dust collectors, and relates to a front-end purification device of a central dust collection system, an air inlet pipe is arranged on the cylinder wall of the front-end purification device, an air outlet pipe is arranged on the upper end face of the front-end purification device, and the pipe diameter of the air outlet pipe is larger than that of the air inlet pipe. A plurality of air holes are formed in the pipe wall, located in the inner cavity of the front-end purification device, of the air outlet pipe, and the air inlet pipe is tangentially connected to the pipe wall of the front-end purification device; an air inlet pipe of the front-end purification device is connected with a dust collection handle; the air outlet pipe is connected with an indoor dust collection hose; the front-end purification device is arranged between the dust collection handle and the dust collection hose, dust-containing gas is firstly subjected to preliminary separation treatment and then discharged to the tail end of a system through the dust collection pipeline, and the problems that the resistance of the system is increased and the pipeline is blocked due to dust accumulation at the bottom of the pipeline or at a bend are greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of central vacuum cleaners and relates to a front-end purification device of a central vacuum system. Background Art

[0002] The working principle of the central vacuum system is to place the central vacuum main unit (including high-efficiency filter bags and vacuum pumps) in a place with relatively low hygiene and noise requirements (such as a storage room, basement, or garage), and connect it to the vacuum port on the wall or ground through pipes installed in the wall or pipe well. Just insert the vacuum tool into the vacuum port to achieve easy cleaning without noise and secondary pollution.

[0003] However, the central vacuum system also has certain defects, specifically: the central vacuum system pipeline is in a fully enclosed state. If the air flow speed is too low or the particle size is large during dust transportation, the dust is easy to settle at the bends or bottom of the pipeline, especially some fiber dust and large particles such as buttons, coins, fruit cores, rings, small accessories, etc. are very easy to settle at the bends of the conveying pipeline; secondly, the pipeline is generally installed in the floor or wall in a concealed manner, and the sediment in the pipeline is not easy to clean; in addition, the back-end processing device of the central vacuum system generally uses a central filter bag to collect garbage. Valuable small items enter the filter bag and are not easy to be retrieved. As the system is used for a long time, the filter bag will cause the system dust removal resistance to increase, and even the filter bag will be damaged, requiring more frequent cleaning or replacement of the filter bag.

[0004] Therefore, a front-end purification device of a central vacuum system is needed to solve the above technical problems. Utility Model Content

[0005] A small cyclone separation and purification device is set in front of the hose of the central vacuum system of the utility model, which first performs preliminary purification treatment on larger particles such as hair and dust in the room, and allows large particles such as buttons, coins, fruit cores, rings, and small accessories to quickly leave the air duct. The cleaner air is then discharged into the concealed pipe. The high-efficiency filter bag in the vacuum host further purifies the tiny particles in the air and then discharges it to the outside through the vacuum pump.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a front-end purification device of a central dust collection system, the front-end purification device is in the shape of a cylinder with both ends closed, an air inlet pipe is provided on the cylinder wall of the front-end purification device, an air outlet pipe is provided at the upper end surface of the front-end purification device, the diameter of the air outlet pipe is larger than the diameter of the air inlet pipe, the air outlet pipe is located in the inner cavity part of the front-end purification device and has a plurality of air holes on the pipe wall, and the air inlet pipe is tangentially connected to the cylinder wall of the front-end purification device;

[0007] The air inlet pipe of the front-end purification device is connected to the dust collection handle; the air outlet pipe is connected to the indoor dust collection hose.

[0008] Preferably, the purification chamber cover at the lower end surface of the front-end purification device is connected by threads.

[0009] More preferably, the part of the purification chamber cover located in the inner cavity of the front-end purification device is in the shape of a frustum with a smaller top and a larger bottom; a gasket made of elastic material is fixedly arranged at the lower part of the inner cavity of the front-end purification device, and the inner ring of the gasket has a taper with a smaller top and a larger bottom, and the taper of the inner ring of the gasket matches the taper of the frustum of the purification chamber cover.

[0010] More preferably, a dust collecting groove which is concave in the axial direction is provided on the inner end surface of the purification chamber cover.

[0011] More preferably, the purification chamber cover, dust collecting tank and air outlet pipe are coaxial.

[0012] Preferably, the diameter of the pores is no greater than 4 mm.

[0013] Preferably, the outlet pipe is connected to a detachable end cap at the pipe opening located in the inner cavity of the front-end purification device.

[0014] The beneficial effects of the utility model are:

[0015] The utility model sets a front-end purification device between the dust suction handle and the dust suction hose, which first separates the dust-laden gas and then discharges it to the end of the system through the dust suction pipe, effectively avoiding the problems of increased system resistance and pipe blockage caused by dust accumulation at the bottom or bend of the pipe; at the same time, it can reduce the cleaning frequency of the terminal filter bag, extend the service life and reduce the maintenance cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of a front-end purification device of a central vacuum system of the present invention;

[0017] Figure 2 It is a top view of the front-end purification device of the utility model;

[0018] Figure 3 This is the front-end purification device of the utility model Figure 2 A side stepped cross-sectional view of

[0019] Figure 4 This is a disassembled schematic diagram of the dust collecting tank of the front-end purification device of the present invention;

[0020] Figure 5 Schematic diagram of the central vacuum system of the present utility model;

[0021] Figure 6 It is the separation efficiency fitting curve diagram of the utility model;

[0022] Figure 7 It is a schematic diagram of the cumulative mass percentage of the test particle size distribution of the present invention.

[0023] Among them, 1. Front-end purification device; 11. Cylinder wall; 2. Air inlet pipe; 3. Air outlet pipe; 31. Air hole; 32. End cover; 4. Purification chamber cover; 5. Gasket; 6. Dust collecting trough; 7. Vacuum handle; 8. Vacuum hose; 9. Vacuum main unit. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technologies in the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] refer to Figures 1 to 7 , a front-end purification device of a central dust collection system in this embodiment, the front-end purification device 1 is in the shape of a cylinder with closed ends, an air inlet pipe 2 is provided on the cylinder wall 11 of the front-end purification device 1, and an air outlet pipe 3 is provided at the upper end surface of the front-end purification device, the diameter of the air outlet pipe 3 is larger than the diameter of the air inlet pipe 2, and the air outlet pipe 3 is located in the inner cavity of the front-end purification device 1. A plurality of air holes 31 are provided on the pipe wall, and the air inlet pipe 2 is tangentially connected to the pipe wall 11 of the front-end purification device 1; the air flow flows into the inner cavity of the front-end purification device 1 from the air inlet pipe 2, forms a spiral outside the air inlet pipe 2 and enters the air outlet pipe 3 from the air hole 31, the air flow slows down, and the dust-laden gas with fine particles and dust after being purified by the air hole 4 is discharged to the end of the system through the dust collection pipe;

[0026] The front-end purification device 1 is arranged between the dust suction handle 7 and the dust suction hose 8. It first performs preliminary separation treatment on the dust-containing gas sucked in by the dust suction main unit 9, and then discharges it to the dust suction main unit 9 through the dust suction hose 8.

[0027] Furthermore, a purification chamber cover 4 is threadedly connected to the lower end surface of the front-end purification device 1 ; the purification chamber cover 4 can be screwed in and out along the central axis of the front-end purification device 1 through the threaded connection.

[0028] Furthermore, the portion of the purification chamber cover 4 located in the inner cavity of the front-end purification device 1 is in the shape of a truncated cone with a smaller top and a larger bottom; a gasket 5 made of elastic material is fixedly arranged at the lower part of the inner cavity of the front-end purification device 1, and the inner ring of the gasket 5 has a taper with a smaller top and a larger bottom, and the taper of the inner ring of the gasket 5 matches the taper of the truncated cone of the purification chamber cover 4; the purification chamber cover 4 cooperates with the conical surface of the gasket 5, so that the deeper the purification chamber cover 4 is screwed in along the axial direction, the tighter it is pressed with the gasket 5, and the better the sealing of the inner cavity of the front-end purification device 1.

[0029] Furthermore, a dust collecting groove 6 which is concave in the axial direction is provided on the inner end surface of the purification chamber cover 4; the dust collecting groove 6 is used to store the purified large particles or dust debris, which is convenient for cleaning and prevents the large particles or dust debris from floating in the inner cavity of the front-end purification device 1 and affecting the dust collection and purification effect.

[0030] Furthermore, the purification chamber cover 4, the dust collecting tank 6, and the air outlet pipe 3 are coaxial.

[0031] Furthermore, the pores 31 have a diameter no greater than 4 mm. Different pore diameters are suitable for different primary purification requirements, and front-end purification devices 1 with different pore diameters can be selected according to different requirements.

[0032] Furthermore, the outlet pipe 3 is connected to a detachable end cover 32 at the pipe mouth of the inner cavity of the front-end purification device 1; the end cover 32 is used when the front-end purification is not needed. At this time, the end cover 11 is opened, and the air flow flows into the inner cavity of the front-end purification device 1 from the air inlet pipe 2, and then turns and sinks before being discharged from the outlet pipe 3, so that only large particles such as buttons, coins, fruit cores, rings, small accessories, etc. fall to the bottom of the front-end purification device 1 after being separated by their own weight, thereby preventing the dust collection pipe from being blocked.

[0033] Example

[0034] The specific structure and gas flow of this embodiment

[0035] In this embodiment, dust-laden gas enters the purification structure tangentially from the right duct, spiraling downward along the outer cylinder wall (an outer vortex). Upon reaching the bottom of the purification structure, it is forced upward (an inner vortex). Under the influence of negative pressure, the airflow passes through the purification holes, rotating upward along the axis. Although the outer vortex points downward and the inner vortex points upward, their rotation directions are consistent.

[0036] The airflow forms a strong vortex between the inner and outer cylinder walls, and the airflow speed near the outer wall decreases rapidly. After the airflow enters the inner cylinder through the filter holes, it rotates with the airflow and gradually rises to the outlet.

[0037] The front-end purification device is installed between the vacuum handle and the vacuum hose. It first performs preliminary separation and treatment on the dust-laden gas, and then discharges it to the end of the system through the vacuum pipe.

[0038] The front-end cyclone separation device proposed by the utility model has a high dust removal efficiency. For particles with a diameter of 5 to 20 μm, the separation efficiency can reach 90%. After the front-end cyclone separation device purifies the particulate dust samples collected indoors, the particle size distribution of the dust is concentrated in the small particle size range (such as Figure 7 ). Set the vacuum handle and vacuum hose as follows. Figure 1The small-scale high-efficiency cyclone dust removal structure shown first performs preliminary separation treatment on the dust-laden gas and collects large particles in the dust collecting tank of the purification structure. The dust-laden gas after preliminary treatment enters the terminal device through the dust suction hose and dust suction pipe, and the rear-end purification device further processes it and discharges it into the air.

[0039] In summary, this utility model can avoid the problems of increased system resistance and pipe blockage caused by dust accumulation at the bottom of the pipe or at bends. The air holes in the outlet pipe can intercept small valuable items in the dust collection trough, making them easier to retrieve. At the same time, it can reduce the frequency of cleaning the terminal filter bag, extend its service life, and reduce system maintenance costs. Therefore, this utility model has broad application prospects.

[0040] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A front-end purification device for a central vacuum system, characterized in that: The front-end purification device (1) is in the shape of a cylinder with closed ends. An air inlet pipe (2) is provided on the cylinder wall (11) of the front-end purification device. An air outlet pipe (3) is provided at the upper end surface of the front-end purification device. The diameter of the air outlet pipe (3) is larger than the diameter of the air inlet pipe (2). The air outlet pipe (3) is located on the pipe wall of the inner cavity of the front-end purification device (1) and is provided with a plurality of air holes (31). The air inlet pipe (2) is tangentially connected to the cylinder wall (11) of the front-end purification device (1); the air inlet pipe (2) of the front-end purification device (1) is connected to the dust suction handle (7), and the air outlet pipe (3) is connected to the indoor dust suction hose (8); the dust-containing gas discharged from the air outlet pipe (3) is discharged to the dust suction main unit (9) through the dust suction main pipe.

2. The front-end purification device of a central vacuum system according to claim 1, characterized in that: A purification chamber cover (4) is threadedly connected to the lower end surface of the front-end purification device (1).

3. The front-end purification device of a central vacuum system according to claim 2, characterized in that: The portion of the purification chamber cover (4) located in the inner cavity of the front-end purification device (1) is in the shape of a truncated cone with a smaller top and a larger bottom; a gasket (5) made of elastic material is fixedly arranged at the lower part of the inner cavity of the front-end purification device (1), and the inner ring of the gasket (5) is provided with a taper with a smaller top and a larger bottom, and the taper of the inner ring of the gasket (5) matches the taper of the truncated cone of the purification chamber cover (4).

4. The front-end purification device of a central vacuum system according to claim 2, characterized in that: The inner end surface of the purification chamber cover (4) is provided with a dust collecting groove (6) which is concave in the axial direction.

5. The front-end purification device of a central vacuum system according to claim 4, characterized in that: The purification chamber cover (4), the dust collecting tank (6), and the air outlet pipe (3) are coaxial.

6. The front-end purification device of a central vacuum system according to claim 1, characterized in that: The diameter of the air hole (31) is no greater than 4 mm.

7. The front-end purification device of a central vacuum system according to claim 1, characterized in that: The outlet pipe (3) is connected to a detachable end cap (32) at the pipe opening located in the inner cavity of the front-end purification device (1).

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