CN108758892B

CN108758892B - Air purifying device

Info

Publication number: CN108758892B
Application number: CN201810560211.9A
Authority: CN
Inventors: 黄小霞
Original assignee: Zhejiang Jinguo Intellectual Property Co Ltd
Current assignee: GUANGZHOU GUANG NUO PURIFICATION EQUIPMENT MANUFACTURING Co.,Ltd.
Priority date: 2018-06-03
Filing date: 2018-06-03
Publication date: 2020-10-30
Anticipated expiration: 2038-06-03
Also published as: CN108758892A

Abstract

The invention relates to the field of air purification, and discloses an air purification device. The air purification device comprises an air inlet cylinder, a main filter screen, an isolating ring, an upper cylinder, an inner cylinder, a filter assembly, a lower sealing plate, an upper sealing plate, a motor, a transmission shaft and fan blades. When the air is filtered, the whole flow resistance is small, and the kinetic energy loss of the air is small in the filtering process. Furthermore, when the motor works under the working condition of lower power, enough air outlet speed and air outlet quantity can be obtained, and energy consumption and noise are reduced.

Description

Air purifying device

Technical Field

The invention relates to the field of air purification, in particular to an air purification device.

Background

The existing household air purifier is characterized in that a cylindrical hollow filter element is arranged in a machine body, negative pressure is generated in the machine body through rotation of a fan, then external air is sucked into the machine body from the peripheral surface of the machine body, then the air penetrates through the peripheral wall of the hollow filter element and enters a space surrounded by the hollow filter element, and finally the air filtered by the hollow filter element is driven by the fan to be discharged from the top of the machine body. The existing air purifier has the problem that the hollow filter element has higher height in order to ensure enough air output. And when air flows in the peripheral wall of the hollow filter element, the optimal balance of flow resistance and filtering efficiency can be achieved along the horizontal radial inward direction. However, since the air inevitably moves upward after entering the peripheral wall of the hollow filter element. Air is directed obliquely upwardly through the peripheral wall of the hollow filter element. The hollow filter element is too large in height, so that the air has a large upward movement stroke in the peripheral wall of the hollow filter element, the kinetic energy of the air is greatly reduced, and the filtering efficiency is not obviously improved. The above situation causes the fan to work under a high-power working condition to be capable of providing enough wind speed and wind quantity.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an air purification device.

The real-time method is realized by the following technical scheme:

an air purification device comprising: the air inlet cylinder body is internally provided with a plurality of partition plates extending radially inwards, the partition plates divide the air inlet cylinder body into a filtering area and an air inlet area which are alternated along the circumferential direction, and the filtering area is provided with a plurality of first air inlet holes; a plurality of second air inlet holes are formed in the air inlet area; the second air inlet holes on each air inlet area are gradually increased in diameter by surrounding the air inlet area from one air inlet area along the first circumferential direction; the main filter screen is arranged in the air inlet cylinder and corresponds to the filtering area; the inner surface of the isolating ring is positioned on the inner side of the main filter screen along the radial direction; the upper cylinder body is connected to the upper end of the air inlet cylinder body and is coaxial with the air inlet cylinder body; the inner cylinder body is connected to the inner edge of the isolating ring and is opposite to the upper cylinder body, and a plurality of vent holes are formed in the inner cylinder body; the filter assembly is arranged between the upper cylinder and the inner cylinder; the lower sealing plate is connected to the lower end of the air inlet cylinder body; the upper sealing plate is connected to the upper end of the upper cylinder body, and an air outlet opposite to the filtering component is formed in the upper sealing plate; the motor is arranged on the lower sealing plate; the transmission shaft extends upwards and is in transmission connection with an output shaft of the motor; the fan blades are connected with the upper end of the transmission shaft; wherein, the flabellum is located the upper end of last barrel.

Further, the wind guide cover is further included; a gap is reserved between the upper end of the inner cylinder and the upper sealing plate, the air guide cover is annular, and the diameter of the air guide cover is gradually reduced along the direction from bottom to top; the lower end of the wind scooper is connected with the upper end of the inner cylinder; the upper end of the air guide cover is connected with the upper sealing plate; the fan blades are covered in the air guide cover.

Furthermore, a plurality of inward-protruding air guide strips are arranged on the inner surface of the air guide cover; the wind-guiding strip extends along first circumferential direction when following from last direction extension extremely down gradually.

Further, the lifting cylinder is also included; the lifting cylinder is positioned in the air inlet cylinder, the lower end of the lifting cylinder is arranged on the lower sealing plate, and the transmission shaft penetrates through the lifting cylinder; along the direction from bottom to top, the external diameter of lift barrel reduces gradually.

Furthermore, a plurality of strip-shaped auxiliary fan blades extending along the up-down direction are arranged on the transmission shaft; the auxiliary fan blades are uniformly arranged around the transmission shaft; the auxiliary fan blade is opposite to the inner cylinder body.

Furthermore, the auxiliary fan blade is provided with a fixing through hole; and an auxiliary filter screen is fixedly arranged in the fixed through hole.

Furthermore, the main filter screen corresponding to the filtering area is of a multilayer structure formed by folding a whole filter screen.

Furthermore, a plurality of support columns are arranged on the lower sealing plate; the support column corresponds to the filtering area and is adjacent to the partition plate; the folding position of the main filter screen bypasses the support column.

Further, the filtering assembly comprises a first filtering pipe, a second filtering pipe and a third filtering pipe which are vertically arranged; the first filter pipes are fixed on the isolating ring and are closely arranged into a circle; the second filter pipes are positioned outside the first filter pipes and fixed on the isolating ring and are closely arranged into a circle; the third filter pipes are positioned outside the second filter pipes and fixed on the isolating ring and are closely arranged into a circle; two ends of the first filtering pipe are closed, and two opposite strip-shaped air holes are formed in the first filtering pipe; the two strip air holes are arranged along the diameter direction of the transmission shaft; two ends of the second filtering pipe are closed; a gap is formed between the second filtering pipe and the first filtering pipe; a plurality of main air inlet through holes are uniformly and densely distributed on the second filter pipe; the lower end of the third filtering pipe is closed, and the upper end of the third filtering pipe is open; the third filter tube is in contact with the second filter tube; a plurality of auxiliary air inlet through holes are uniformly and densely distributed on the part of the peripheral surface of the third filtering pipe close to the second filtering pipe; the diameter of the auxiliary air inlet through hole is smaller than that of the main air inlet through hole.

Further, the inner space of the cross section of the first filtering pipe is 8-shaped, and the strip-shaped air hole is communicated with the narrowest part of the inner space of the cross section of the first filtering pipe.

The technical scheme of the invention at least has the following advantages or beneficial effects:

in the air purification device provided by the embodiment of the invention, in the working process, the motor drives the fan blades to rotate, so that negative pressure is generated inside the air purification device, and external air enters the air inlet cylinder body through the first air inlet hole and the second air inlet hole. After entering through the first air inlet, the air passes through the main filter screen and is filtered. Since the second air inlet holes on each air inlet area are gradually increased in diameter by starting from one of the air inlet areas and surrounding along the first circumferential direction, the air amount entering through each air inlet area is different, and then pressure difference is generated in the air inlet cylinder, so that spiral air flow is formed. The helical airflow moves upward into the inner cylinder. Under the action of centrifugal force, the spiral airflow moves outwards in the radial direction, passes through the vent hole, enters the filtering component, is secondarily filtered by the filtering component and then is discharged through the air outlet. The air purification device provided by the embodiment of the invention adopts a two-section type filtering mode comprising main filter screen filtering and filtering component filtering, so that the height of the main filter screen is greatly reduced, the upward movement stroke of air passing through the main filter screen is shortened, and the kinetic energy loss of the air passing through the main filter screen is further reduced. In addition, a small part of air can enter the air inlet cylinder body through the second air inlet hole under the condition of almost no obstruction, so that even under the condition that the height of the main filter screen is greatly reduced, enough air inlet amount and air outlet amount can be ensured. Because most of air is filtered through the main filter screen, only the air entering through the second air inlet hole needs to be filtered again, the impurity content of the air in the inner cylinder body is low, and the filtering component can filter impurities in the air in the inner cylinder body when the air passes through without strong filtering capacity. In this way, the filter assembly may be designed to have a low flow resistance. In addition, the helical airflow causes the air to have a greater momentum radially outward after entering the filter assembly, further reducing the flow resistance of the air. So for air purification device is when filtering air, and whole flow resistance is less, and the air is at the filtration in-process, and kinetic energy loss is little. Furthermore, when the motor works under the working condition of lower power, enough air outlet speed and air outlet quantity can be obtained, and energy consumption and noise are reduced.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings needed to be used in the embodiment are briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. From these figures, other figures can be derived by those skilled in the art without inventive effort.

Fig. 1 is a schematic view of an internal structure of an air purification apparatus according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic bottom view of an air guiding cover in an air purifying apparatus according to an embodiment of the present invention;

fig. 4 is a partial sectional view taken along line B-B of fig. 1.

In the figure: 010-an air purification device; 100-an air inlet cylinder body; 101-a separator; 102-a filtration zone; 102 a-a first inlet aperture; 103-an air intake zone; 103 a-a second inlet hole; 110-a lift cylinder; 200-a main filter screen; 300-a spacer ring; 400-upper cylinder; 500-inner cylinder; 501-air holes; 510-a wind scooper; 511-wind guide strips; 600-a filter assembly; 610-a first filtering conduit; 611-long air holes; 620-a second filtering conduit; 621-main intake through hole; 630-a third filtering conduit; 631-secondary inlet via; 710-a lower closure plate; 711-support columns; 810-an upper sealing plate; 811-air outlet; 910-a motor; 920-a transmission shaft; 921-auxiliary fan sheet; 921 a-fixed vias; 921 b-auxiliary strainer; 930-fan blades.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.

Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

Example 1:

fig. 1 is a schematic view of an internal structure of the air purifying device 010 provided in this embodiment. Fig. 2 is a sectional view taken along line a-a of fig. 1. Referring to fig. 1 and 2, in the present embodiment, the air purifying apparatus 010 includes an air inlet cylinder 100, a main filter 200, a spacer ring 300, an upper cylinder 400, an inner cylinder 500, a filter assembly 600, a lower sealing plate 710, an upper sealing plate 810, a motor 910, a transmission shaft 920, and fan blades 930.

The air intake cylinder 100 has a cylindrical shape, and an inner surface thereof is provided with a plurality of partitions 101 extending radially inward. The baffle 101 circumferentially divides the intake barrel 100 into alternating filtering and

intake zones

102, 103. Wherein the width of the filtering section 102 is greater than the width of the intake section 103. The filtering area 102 is provided with a plurality of first air inlet holes 102 a. The number and diameter of the first air inlet holes 102a formed in each filtering area 102 are the same. A plurality of second intake holes 103a are opened in the intake area 103. The number of the second air inlet holes 103a formed in each air inlet area 103 is the same. The diameter of the second intake holes 103a in each intake area 103 is gradually increased along a circle which is opened along one specific intake area 103 and surrounds in the first circumferential direction (i.e., clockwise direction in fig. 2).

A plurality of main screens 200 are disposed in the intake cylinder 100, and are aligned with the respective filtering zones 102.

The isolating ring 300 is coaxially disposed with the air intake cylinder 100, and the outer periphery of the isolating ring 300 is fixedly connected to the upper end of the air intake cylinder 100. In the radial direction, the inner surface of the spacer ring 300 is located inside the main screen 200. Also, in the present embodiment, the upper end of the main screen 200 abuts against the lower surface of the spacer ring 300.

The upper cylinder 400 is coaxially arranged with the air inlet cylinder 100, and the upper cylinder 400 is fixedly connected with the upper end of the air inlet cylinder 100.

The inner cylinder 500 is coaxially disposed with the air intake cylinder 100, and the inner cylinder 500 is disposed in the upper cylinder 400 and opposite to the upper cylinder 400. The lower end of the inner cylinder 500 is fixedly connected with the inner circumference of the isolating ring 300. The inner cylinder 500 is provided with a plurality of vent holes 501. The vent holes 501 are elongated and extend in the vertical direction, and are uniformly arranged in the circumferential direction on the inner cylinder 500. Also, the width of the vent holes 501 is larger than the spacing between adjacent vent holes 501.

The filter assembly 600 is disposed between the upper cylinder 400 and the inner cylinder 500.

The lower sealing plate 710 is connected to the lower end of the intake cylinder 100 to seal the lower section of the intake cylinder 100. Also, in the present embodiment, the lower end of the main screen 200 abuts against the lower closure plate 710.

The upper sealing plate 810 is connected to the upper end of the upper cylinder 400 to seal the upper end of the upper cylinder 400. A plurality of air outlets 811 are formed on the upper sealing plate 810, and the air outlets 811 are opposite to the filter assembly 600.

The motor 910 is fixed to the lower cover plate 710, and an output shaft of the motor 910 is coaxial with the intake cylinder 100. The transmission shaft 920 is coaxial with the air inlet cylinder 100, the transmission shaft 920 is in transmission connection with the output shaft of the motor 910, the upper end of the transmission shaft 920 extends upwards to the upper end of the upper cylinder 400, and is connected with the fan blade 930 positioned at the upper end of the upper cylinder 400.

In the air purification device 010 of this embodiment, in the working process, the motor 910 drives the fan blade 930 to rotate, so that the inside of the air purification device 010 generates negative pressure, and the outside air enters the air inlet barrel 100 through the first air inlet 102a and the second air inlet 103 a. After entering through the first air intake holes 102a, the air is filtered by passing through the main screen 200. Since the second intake holes 103a on each intake area 103 are gradually increased in diameter from one specific intake area 103 to one specific intake area in the first circumferential direction, the amount of air entering through each intake area 103 is different, and thus a pressure difference is generated in the intake cylinder 100, and a spiral air flow is formed. The spiral air flow moves upward into the inner cylinder 500. Under the action of centrifugal force, the spiral airflow moves radially outwards, enters the filter assembly 600 through the vent hole 501, is secondarily filtered by the filter assembly 600, and is discharged through the air outlet 811. The air purifying device 010 of the present embodiment adopts a two-stage filtering method including the main filter screen 200 filtering and the filter assembly 600 filtering, which greatly reduces the height of the main filter screen 200, shortens the upward movement stroke of the air passing through the main filter screen 200, and further reduces the kinetic energy loss of the air passing through the main filter screen 200. In addition, a small portion of air can be introduced into the air intake cylinder 100 through the second air intake holes 103a with almost no hindrance, so that a sufficient intake and discharge amount can be secured even in the case where the height of the main screen 200 is greatly reduced. Since most of the air is filtered through the main filter 200 and only the air introduced through the second air intake holes 103a needs to be filtered again, the impurity content of the air in the inner cylinder 500 is low, which allows the filter assembly 600 to filter impurities therein without strong filtering power when the air in the inner cylinder 500 passes therethrough. As such, filter assembly 600 may be designed to have a low flow resistance. In addition, the helical airflow provides greater momentum of the air radially outward after entering the filter assembly 600, further reducing the flow resistance of the air. Therefore, when the air purification device 010 filters air, the whole flow resistance is small, and the kinetic energy loss of the air is small in the filtering process. Furthermore, when the motor 910 operates under a low power condition, sufficient air outlet speed and air outlet volume can be obtained, and energy consumption and noise are reduced.

Further, in this embodiment, the air purifying device 010 further includes an air guiding cover 510. A gap is formed between the upper end of the inner cylinder 500 and the upper sealing plate 810, the air guide cover 510 is annular, and the diameter of the air guide cover 510 is gradually reduced along the direction from bottom to top; the lower end of the wind scooper 510 is fixedly connected with the upper end of the inner cylinder 500. The upper end of the wind scooper 510 is connected with the upper sealing plate 810; the fan blade 930 is covered in the wind scooper 510. In air cleaner 010, as the spiral airflow moves upward, a large portion moves radially outward into filter assembly 600 and a small portion continues to move upward through fan blades 930 and collide with upper closure plate 810. At this time, if the airflow colliding with the upper sealing plate 810 is not guided radially, the airflow moving along the upper sealing plate 810 cannot flow downward from the edge of the fan blade 930, and then a vortex having a radially inward flow tendency is most likely to be formed above the fan blade 930, and since the air pressure above the fan blade 930 is large, the vortex flows downward through the central portion of the fan blade 930, and thus the airflow flow direction below the fan blade 930 is influenced, so that the centrifugal force of the airflow below the fan blade 930 in the radial direction is weakened, and the speed of the air entering the filter assembly 600 is reduced. Therefore, in the present embodiment, the wind scooper 510 is provided. The cross-sectional profile of the wind scooper 510 is radially inwardly concave. When the airflow passes through the fan blade 930 and collides with the upper sealing plate 810, most of the airflow moves radially outward along the lower surface of the upper sealing plate 810, and gradually contacts with the inner surface of the air guiding cover 510 in the process of the radially outward movement of the airflow, and because the diameter of the air guiding cover 510 gradually decreases in the direction from bottom to top, in the process of the airflow flowing, the air guiding cover 510 can apply a downward reaction force to the airflow, so that the airflow flows downward along the air guiding cover 510, and flows to the lower side of the fan blade 930 through the edge of the fan blade 930, and then enters the filter assembly 600 under the driving of the spiral airflow below the fan blade 930. This avoids the travel of the vortex flow having a tendency to flow radially inward, and thus avoids the problem of the centrifugal force of the air flow radially outward under fan blades 930 weakening. In addition, in the present embodiment, the cross-sectional profile of the wind scooper 510 is recessed radially inward, such that during the process of the airflow flowing radially outward along the wind scooper 510, the lower the airflow flowing to the lower position is, the smaller the reaction force of the downward flow is, so that when the airflow exits from the wind scooper 510, the airflow can keep more radially outward momentum and keep less radially downward momentum, thereby facilitating the airflow to enter and pass through the filter assembly 600.

Referring to fig. 3, fig. 3 is a schematic bottom view of the air guiding cover 510 of the air purifying device 010 according to the embodiment. Further, in the present embodiment, the inner surface of the wind scooper 510 is provided with a plurality of wind guide strips 511 protruding inward; the air guide strips 511 gradually extend in the direction from top to bottom and extend in the first circumferential direction. By arranging the air guide strips 511, the air flow can be guided to move along a spiral track in the same direction as the air flow below the fan blades 930 while moving downwards along the air guide cover 510. When the airflow moves to the lower portion of the fan blade 930 along the wind scooper 510, the airflow has a centrifugal force large enough to enter the filter assembly 600, and the airflow does not need to be driven by the airflow below the fan blade 930, so as to further improve the kinetic energy of the air entering the filter assembly 600.

Further, in this embodiment, the air purifying device 010 further includes a lift cylinder 110. The lift cylinder 110 is located within the air intake cylinder 100. The lift cylinder 110 and the air inlet cylinder 100 are coaxially arranged, the lower end of the lift cylinder 110 is arranged on the lower sealing plate 710, and the transmission shaft 920 penetrates through the lift cylinder 110; the outer diameter of the lift cylinder 110 gradually decreases in the direction from bottom to top. The lift cylinder 110 is used for providing an upward reaction force for the spiral airflow formed in the air inlet cylinder 100, so that the spiral airflow in the air inlet cylinder 100 can move upward, the air volume in the lift cylinder 110 is reduced, and the upward flow speed of the spiral airflow is finally improved. Further, in the present embodiment, the cross-sectional profile of the lift cylinder 110 is convex radially outward. Due to the arrangement, most of the airflow can flow upwards into the inner cylinder 500 at the position closer to the outside in the radial direction, so that the air quantity at the central part in the inner cylinder 500 is reduced, the air quantity at the inner edge part of the inner cylinder 500 is increased, and the air in the inner cylinder 500 can more easily enter the filter assembly 600.

Further, in the present embodiment, the transmission shaft 920 is provided with a plurality of elongated auxiliary blades 921 extending in the up-down direction; the plurality of auxiliary fan pieces 921 are uniformly arranged around the transmission shaft 920; the auxiliary fan 921 is disposed opposite to the inner cylinder 500. The auxiliary fan 921 can help the air at the center of the inner cylinder 500 to rotate, so that the air in the inner cylinder 500 can move radially outward, and further, as much air as possible can smoothly enter the filter assembly 600.

Further, in the present embodiment, the auxiliary fan 921 is provided with a fixing through hole 921 a; the auxiliary filter screen 921b is fixedly disposed in the fixing through hole 921 a. Through setting up supplementary filter screen 921b, can carry out certain degree of filtration to the air at interior barrel 500 center, adsorb impurity wherein, avoid impurity downstream to adhere to on flabellum 930, and then avoided the load of motor 910 to increase because of the weight increase of flabellum 930.

The main screen 200 may be formed by stacking a plurality of screens, but the manufacturing process of the main screen 200 is complicated and the assembly process is complicated. Therefore, in the present embodiment, the main screen 200 is a multi-layer structure formed by folding a whole screen. Therefore, the manufacturing process is simplified, and the assembly steps are simpler and more convenient. Further, in this embodiment, a plurality of support columns 711 are disposed on the lower sealing plate 710; the supporting column 711 corresponds to the filtering area 102 and is adjacent to the partition plate 101; the folds of the main screen 200 bypass the support posts 711. The supporting posts 711 support the main screen 200, and help the main screen 200 maintain its shape during operation, making its operation more stable. In addition, under the effect of the supporting column 711, a gap can be maintained between two adjacent layers of the main filter screen 200, and the gap can store impurities in the air intercepted by the main filter screen 200, thereby prolonging the service life of the main filter screen 200.

Fig. 4 is a partial sectional view taken along line B-B of fig. 1. Referring to fig. 4, in the present embodiment, the filter assembly 600 includes a first filter pipe 610, a second filter pipe 620, and a third filter pipe 630, which are vertically disposed; a plurality of first filtering pipes 610 are fixed on the isolating ring 300 and closely arranged in a circle; the plurality of second filtering pipes 620 are positioned outside the first filtering pipe 610, and the plurality of second filtering pipes 620 are fixed on the isolating ring 300 and are closely arranged in a circle; the plurality of third filtering pipes 630 are positioned outside the second filtering pipe 620, and the plurality of third filtering pipes 630 are fixed on the isolating ring 300 and are closely arranged in a circle. The two ends of the first filtering pipe 610 are closed, and two opposite strip-shaped air holes 611 are formed in the first filtering pipe 610; two elongated air holes 611 are arranged in a diameter direction of the driving shaft 920. The second filtering pipe 620 is closed at both ends; there is a gap between the second filtering pipe 620 and the first filtering pipe 610. A plurality of main air inlet through holes 621 are uniformly and densely distributed on the second filtering pipe 620. The lower end of the third filtering pipe 630 is closed, and the upper end is open; third filtering pipe 630 is in contact with second filtering pipe 620; a plurality of auxiliary air inlet through holes 631 are uniformly and densely distributed on the part of the peripheral surface of the third filtering pipe 630 close to the second filtering pipe 620; the diameter of the sub intake through hole 631 is smaller than that of the main intake through hole 621. Since the air in the inner cylinder 500 has a low impurity content, the filter assembly 600 does not need a strong filtering capability to filter impurities in the air in the inner cylinder 500 when passing therethrough. For this reason, in the present embodiment, the filter assembly 600 does not employ a conventional mesh filter structure, but rather a tubular structure, thus accomplishing the filtering of the air inside the inner cylinder 500 with less air flow resistance. During operation, the air in the inner cylinder 500 enters the first filtering pipe 610 through the inner strip air holes 611, and after entering the first filtering pipe 610, the air expands in the radial direction in the first filtering pipe 610, so that most of the impurities in the air are retained in the first filtering pipe 610, and the air flows out through the outer strip air holes 611. The air flowing out of the first filtering pipe 610 is collected in the gap between the first filtering pipe 610 and the second filtering pipe 620 to generate a higher air pressure, so that the impurities in the first filtering pipe 610 can be prevented from escaping. The air then re-enters the second filtering pipe 620, during which the second filtering pipe 620 may trap a portion of the impurities. The air then enters the third filtering pipe 630, and since the diameter of the sub air inlet through hole 631 of the third filtering pipe 630 is smaller than the diameter of the main air inlet through hole 621 of the second filtering pipe 620, the third filtering pipe 630 can filter the impurities that are not trapped by the second filtering pipe 620. After entering the third filtering pipe 630, the air flows out through the upper end of the third filtering pipe 630, and finally passes through the air outlet 811. The filter assembly 600 of this embodiment adopts a tubular structure, and can filter impurities contained in the air in the inner cylinder 500, and the air flow resistance is small, so that the air can pass through quickly.

Further, in this embodiment, the inner space of the cross section of the first filtering pipe 610 is 8-shaped, and the two strip air holes 611 are communicated with the narrowest portion of the inner space of the cross section of the first filtering pipe 610. Therefore, in the first filtering pipe 610, the spaces at the two sides of the strip air hole 611 can better lock the impurities in the air, and further effectively prevent the impurities from escaping to the outside of the first filtering pipe 610 through the strip air hole 611 at the outer side.

The above description is only a partial example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air purification apparatus, comprising:

the air inlet cylinder body is internally provided with a plurality of partition plates extending radially inwards, the partition plates divide the air inlet cylinder body into a filtering area and an air inlet area which are alternated along the circumferential direction, and the filtering area is provided with a plurality of first air inlet holes; a plurality of second air inlet holes are formed in the air inlet area; the second air inlet holes on each air inlet area are gradually increased in diameter by surrounding the air inlet area from one air inlet area along the first circumferential direction;

the main filter screen is arranged in the air inlet cylinder and corresponds to the filtering area;

the inner surface of the isolating ring is positioned on the inner side of the main filter screen along the radial direction;

the upper cylinder body is connected to the upper end of the air inlet cylinder body and is coaxial with the air inlet cylinder body;

the inner cylinder body is connected to the inner edge of the isolating ring and is opposite to the upper cylinder body, and a plurality of vent holes are formed in the inner cylinder body;

the filter assembly is arranged between the upper cylinder and the inner cylinder;

the lower sealing plate is connected to the lower end of the air inlet cylinder body;

the upper sealing plate is connected to the upper end of the upper cylinder body, and an air outlet opposite to the filtering component is formed in the upper sealing plate;

the motor is arranged on the lower sealing plate;

the transmission shaft extends upwards and is in transmission connection with an output shaft of the motor; and

the fan blades are connected with the upper end of the transmission shaft;

wherein the fan blades are positioned at the upper end of the upper cylinder body;

the filtering component comprises a first filtering pipe, a second filtering pipe and a third filtering pipe which are vertically arranged; the first filter pipes are fixed on the isolating ring and are closely arranged into a circle; the second filter pipes are positioned outside the first filter pipes and fixed on the isolating ring and are closely arranged into a circle; the third filter pipes are positioned outside the second filter pipes and fixed on the isolating ring and are closely arranged into a circle;

two ends of the first filtering pipe are closed, and two opposite strip-shaped air holes are formed in the first filtering pipe; the two strip air holes are arranged along the diameter direction of the transmission shaft;

two ends of the second filtering pipe are closed; a gap is formed between the second filtering pipe and the first filtering pipe; a plurality of main air inlet through holes are uniformly and densely distributed on the second filter pipe;

the lower end of the third filtering pipe is closed, and the upper end of the third filtering pipe is open; the third filter tube is in contact with the second filter tube; a plurality of auxiliary air inlet through holes are uniformly and densely distributed on the part of the peripheral surface of the third filtering pipe close to the second filtering pipe; the diameter of the auxiliary air inlet through hole is smaller than that of the main air inlet through hole;

the inner space of the cross section of the first filtering pipe is 8-shaped, and the two strip-shaped air holes are communicated with the narrowest part of the inner space of the cross section of the first filtering pipe.

2. An air cleaning device according to claim 1, characterized in that:

the wind guide cover is also included;

a gap is reserved between the upper end of the inner cylinder and the upper sealing plate, the air guide cover is annular, and the diameter of the air guide cover is gradually reduced along the direction from bottom to top;

the lower end of the wind scooper is connected with the upper end of the inner cylinder; the upper end of the air guide cover is connected with the upper sealing plate; the fan blades are covered in the air guide cover.

3. An air cleaning device according to claim 2, characterized in that:

the inner surface of the wind scooper is provided with a plurality of wind guide strips protruding inwards; the wind-guiding strip extends along first circumferential direction when following from last direction extension extremely down gradually.

4. An air cleaning device according to claim 1, characterized in that:

the lifting cylinder is also included; the lifting cylinder is positioned in the air inlet cylinder, the lower end of the lifting cylinder is arranged on the lower sealing plate, and the transmission shaft penetrates through the lifting cylinder; along the direction from bottom to top, the external diameter of lift barrel reduces gradually.

5. An air cleaning device according to claim 4, characterized in that:

a plurality of strip-shaped auxiliary fan blades extending along the up-down direction are arranged on the transmission shaft; the auxiliary fan blades are uniformly arranged around the transmission shaft; the auxiliary fan blade is opposite to the inner cylinder body.

6. An air cleaning device according to claim 5, characterized in that:

the auxiliary fan blade is provided with a fixing through hole; and an auxiliary filter screen is fixedly arranged in the fixed through hole.

7. An air cleaning device according to claim 1, characterized in that:

the main filter screen corresponding to the filtering area is of a multilayer structure formed by folding a whole filter screen.

8. An air cleaning device according to claim 7, characterized in that:

a plurality of support columns are arranged on the lower sealing plate; the support column corresponds to the filtering area and is adjacent to the partition plate; the folding position of the main filter screen bypasses the support column.