CN118960142A

CN118960142A - An air purifier with a backward-angled fan placed at the bottom and air outlet at the top

Info

Publication number: CN118960142A
Application number: CN202411057007.7A
Authority: CN
Inventors: 费玉珍; 陈晓强
Original assignee: Suzhou Panli Fan Manufacturing Co ltd
Current assignee: Suzhou Panli Fan Manufacturing Co ltd
Priority date: 2024-08-02
Filing date: 2024-08-02
Publication date: 2024-11-15

Abstract

The invention provides an air purifier with a back-inclined fan arranged below and capable of exhausting air from the top, and relates to the technical field of air purification. The air purifier with the back-inclined fan and the lower top air outlet comprises a shell, a barrel, an air extracting mechanism, a pipe body, helical blades and filtering units, wherein the air extracting mechanism is arranged at the inner bottom of the shell, the barrel is arranged in the shell, an air outlet of the air extracting mechanism is communicated with the bottom of the barrel, the pipe body is arranged in the barrel, the pipe body and the barrel are coaxially arranged, the inner periphery of the helical blades is abutted to the outer peripheral surface of the pipe body, the outer periphery of the helical blades is connected with the inner peripheral surface of the barrel, and a plurality of filtering units are arranged in a helical air passage from bottom to top along a helical path. According to the invention, the flow path of air is increased, the flow time of the air in the cylinder is prolonged, and the air can sequentially pass through the plurality of filtering units in the spiral air passage from bottom to top, so that the filtering times of the air are increased, and the air purifying effect is improved.

Description

Air purifier with bottom top air outlet of back-inclined fan

Technical Field

The invention relates to the technical field of air purification, in particular to an air purifier with a back-inclined fan arranged below and with top air outlet.

Background

The air purifier is a product capable of adsorbing, decomposing or converting various air pollutants (generally including dust, pollen, peculiar smell, decoration pollution such as formaldehyde, bacteria, allergens and the like) and effectively improving the air cleanliness, and is mainly used for household and commercial air purifiers for removing indoor air pollution.

At present, when most air purifies air, the air is introduced into the air purifier from the external environment, then the air is discharged to the external environment after passing through the filter element device, and the air cannot be sufficiently filtered in the filtering mode, so that the filtering effect is affected to a certain extent.

Disclosure of Invention

In order to solve the problems, the invention provides an air purifier with a back-inclined fan arranged below and with top air outlet.

The invention provides an air purifier with a back dip fan arranged below and with top air outlet, which comprises:

a housing;

the cylinder body is arranged in the shell;

the air exhaust mechanism is arranged at the inner bottom of the shell, and an air outlet of the air exhaust mechanism is communicated with the bottom of the cylinder;

the pipe body is arranged in the cylinder body and is coaxially arranged with the cylinder body;

The inner peripheral edge of the spiral blade is in contact with the outer peripheral surface of the tube body, and the outer peripheral edge of the spiral blade is connected with the inner peripheral surface of the cylinder body so as to form a spiral air passage for gas to flow in a spiral path in the cylinder body;

The filtering units are arranged in the spiral air passage from bottom to top along the spiral path.

Optionally, the filter unit includes just imitates filter screen, HEPA filter screen and active carbon filter screen, and is a plurality of just imitate the filter screen, a plurality of HEPA filter screen with a plurality of the active carbon filter screen is followed spiral air flue sets up from bottom to top.

Optionally, the primary filter screen, the HEPA filter screen and the active carbon filter screen are respectively connected with the outer peripheral surface of the pipe body, the inner peripheral surface of the cylinder body and the opposite surfaces of the adjacent blades corresponding to the spiral blades on the peripheral sides.

Optionally, the tube body is made of quartz glass, a hollow cavity is formed in the tube body, the ultraviolet lamp is arranged in the hollow cavity, and the ultraviolet lamp and the tube body are coaxially arranged.

Optionally, the upper portion of body is equipped with the inlet opening, the lower part global still is equipped with a plurality of apopores of body, the one end of apopore with cavity intercommunication, the other end orientation of apopore just be equipped with the check valve in the apopore the elementary filter screen.

Optionally, a nano titanium dioxide coating is arranged on the surface of the spiral blade and/or the inner peripheral surface of the cylinder.

Optionally, the device further comprises a supporting mechanism, wherein the supporting mechanism comprises a supporting ring and a supporting rod, one end of the supporting rod is connected to the inner bottom surface of the shell, the other end of the supporting rod is connected with the supporting ring, and the supporting ring is used for supporting the cylinder.

Optionally, the air extraction mechanism includes back rake fan, casing and exhaust tube, the casing connect in the interior bottom surface of shell, just the top of casing with the barrel intercommunication, back rake fan connect in the casing, just the air intake of back rake fan sets up downwards, the air outlet of back rake fan sets up upwards, the surface lower limb of shell is equipped with a plurality of through-holes, a plurality of the one end of exhaust tube respectively with the through-hole intercommunication, a plurality of the other end of exhaust tube respectively with the inner chamber lower part intercommunication of casing.

Optionally, the top surface of shell is equipped with the upper cover, the upper cover connect in the top surface of barrel, the upper cover with the top surface of barrel is equipped with a plurality of air-out holes, the bottom of barrel narrows and forms the air intake, the air intake extend into in the die-ring and with the inner chamber upper portion intercommunication of casing, the air intake with form step portion between the barrel, step portion be used for the butt in the upper surface of die-ring.

Optionally, the exhaust tube is inclined, the lower end of the exhaust tube is communicated with the through hole, the higher end of the exhaust tube is communicated with the lower part of the inner cavity of the shell, and a coarse filter screen is arranged in the lower end of the exhaust tube.

The air purifier with the back-inclined angle fan arranged below and with the top for air outlet has the beneficial effects that: through the bottom of putting down the mechanism of bleeding at the shell, make the mechanism of bleeding can introduce the barrel bottom in the shell indoor air, through being connected helical blade's peripheral edge and the inner peripheral face of barrel, helical blade's inner peripheral edge and the outer peripheral face butt of body, make body and helical blade just can form spiral air flue at the inner chamber of barrel, thereby make the air can follow the spiral air flue from barrel bottom and flow to barrel top with spiral route, and then increased the flow path of air, the flow time of air in the barrel inside has been prolonged, and the air can pass through a plurality of filter units in the spiral air flue from bottom to top in proper order, thereby increased the filtration number of times of air, the purifying effect of air has been improved.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention;

FIG. 3 is a schematic view of the installation of a helical blade in an embodiment of the invention;

FIG. 4 is a cross-sectional view of a helical blade in an embodiment of the invention;

FIG. 5 is a schematic diagram of an exhaust pipe according to an embodiment of the present invention;

FIG. 6 is a schematic view of a primary filter screen according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a HEPA filter according to an embodiment of the invention;

FIG. 8 is a schematic view of the structure of an activated carbon filter screen according to an embodiment of the present invention;

FIG. 9 is a first prior art airflow pattern;

Fig. 10 shows a second prior art airflow pattern.

Reference numerals illustrate:

1. A housing; 11. a through hole; 12. an upper cover; 2. a cylinder; 21. an air inlet; 3. an air extraction mechanism; 31. a back rake fan; 32. a housing; 33. an exhaust pipe; 4. a tube body; 41. a water inlet hole; 42. a water outlet hole; 43. a hollow cavity; 5. a helical blade; 6. an ultraviolet lamp; 7. a filtering unit; 71. a primary filter screen; 72. HEPA filter screen; 73. an activated carbon filter screen; 8. a one-way valve; 9. a coarse filter screen; 10. a support mechanism; 101. a backing ring; 102. and (5) supporting the rod.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, descriptions of the terms "embodiment," "one embodiment," "some embodiments," "illustratively," and "one embodiment" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.

The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. As such, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

The Z axis in the figure represents vertical, i.e. up and down, and the positive direction of the Z axis represents up and the negative direction of the Z axis represents down; the X-axis in the drawing indicates the horizontal direction and is designated as the left-right position, and the positive direction of the X-axis indicates the right side and the negative direction of the X-axis indicates the left side; the Y-axis in the drawing indicates the front-rear position, and the positive direction of the Y-axis indicates the front side, and the negative direction of the Y-axis indicates the rear side. It should also be noted that the foregoing Z-axis, Y-axis, and X-axis are meant to be illustrative only and not indicative or implying that the apparatus or component in question must be oriented, configured or operated in a particular orientation, and therefore should not be construed as limiting the invention.

In the related art, when most of the existing air cleaners purify air, the flow path of the air in the air cleaners is divided into two types, as shown in fig. 9, the first type of air flow is a hollow cylindrical structure, the external air sequentially passes through different filter layers from the outer periphery of the filter core device according to the arrow direction in the figure, and the purified air flows upward from the filter core device and is finally discharged. The second air flow mode is shown in fig. 10, in which the filter element device has a plate-like structure, and external air sequentially passes through different filter layers from one side of the filter element device to the other side of the filter element device according to the arrow direction in the figure, and then is discharged. In the two modes, the gas flowing paths in the air purifier are short, and the filtering effect on the gas is limited.

In view of the above problems of the related art, the present invention provides an air cleaner with a back-rake fan having a lower top outlet, which can sufficiently filter the air flow a plurality of times by flowing the air flow in a spiral path and providing a plurality of filter units 7 on the spiral path, thereby improving the air cleaning effect.

As shown in fig. 1, 2 and 3, the embodiment of the invention provides an air purifier with a back-inclined fan with a top arranged at the bottom and an air outlet, which comprises a shell 1, a cylinder 2, an air extracting mechanism 3, a pipe body 4, a spiral blade 5 and a filtering unit 7, wherein the air extracting mechanism 3 is arranged at the inner bottom of the shell 1, the cylinder 2 is arranged in the shell 1, an air outlet of the air extracting mechanism 3 is communicated with the bottom of the cylinder 2, the pipe body 4 is arranged in the cylinder 2, the pipe body 4 and the cylinder 2 are coaxially arranged, the inner periphery of the spiral blade 5 is abutted with the outer periphery of the pipe body 4, the outer periphery of the spiral blade 5 is connected with the inner periphery of the cylinder 2, so that a spiral air passage for air to flow in a spiral path is formed in the cylinder 2, and a plurality of filtering units 7 are arranged in the spiral air passage from bottom to top along the spiral path.

Specifically, the casing 1 may be rectangular or cylindrical, the cylinder 2 is a cylindrical structure with an opening at the bottom, and the axis of the cylinder 2 is along the Z-axis direction in the drawing, the cylinder 2 is disposed in the middle of the inner cavity of the casing 1, and the axis of the tube 4 is also along the Z-axis direction in the drawing, since the helical blade 5 has a plurality of blades from bottom to top, the inner periphery and the outer periphery of the helical blade 5 refer to the inner periphery and the outer periphery of each blade, the cylinder 2 and the helical blade 5 may be made of metal materials, and may be fixed on the inner periphery of the cylinder 2 by welding, so that the inner periphery of the helical blade 5 is abutted to the outer periphery of the tube 4, and the tube 4 and the helical blade 5 may form a helical air channel in the inner cavity of the cylinder 2.

In this embodiment, through putting down the air extraction mechanism 3 in the interior bottom of shell 1, make air extraction mechanism 3 can introduce the barrel 2 bottom in the shell 1 indoor air, through being connected the periphery edge of helical blade 5 with the inner peripheral face of barrel 2, the inner peripheral edge of helical blade 5 is in butt with the outer peripheral face of body 4, make body 4 and helical blade 5 just can form the spiral air flue at the inner chamber of barrel 2, thereby make the air can follow the spiral air flue from barrel 2 bottom and flow to barrel 2 top with the spiral route, and then increased the flow path of air, the flow time of air in barrel 2 has been prolonged, and the air can pass through a plurality of filter units 7 in the spiral air flue from bottom to top in proper order, thereby increased the filtration number of times of air, the purifying effect of air has been improved.

Optionally, as shown in fig. 2 and 3, the filtering unit 7 includes a primary filter 71, a HEPA filter 72 and an activated carbon filter 73, and the multiple primary filters 71, the multiple HEPA filters 72 and the multiple activated carbon filters 73 are disposed along the spiral air passage from bottom to top.

In this alternative embodiment, the primary filter screen 71 is primarily designed to capture large particles of dust, hair, and debris, and the primary filter screen 71 is typically made of a relatively coarse fiber or mesh material to facilitate rapid filtration of large volumes of air and to extend the life of subsequent filter screens. The HEPA filter 72 is a high efficiency particulate air filter capable of capturing and removing particles of 0.3 micrometer (μm) or more, the fine particles include pollen, dust mites, smoke, bacteria, viruses, etc., the HEPA filter 72 is generally made of fine glass fibers, the activated carbon filter 73 is capable of adsorbing the odor and harmful gases in the air, when the air enters the spiral air passage from the bottom of the cylinder 2, since the plurality of primary filters 71 are disposed at the lower portion of the spiral air passage, the air first needs to pass through the plurality of primary filters 71, so that the dust of the large particles is first sufficiently captured by the plurality of primary filters 71, the plurality of HEPA filters 72 are disposed at the middle portion of the spiral air passage, the air after passing through the plurality of primary filters 71 passes through the plurality of HEPA filters 72 in turn, so that the smaller particles are sufficiently removed by the plurality of HEPA filters 72, and the air after passing through the plurality of HEPA filters 72 passes through the plurality of activated carbon filters 73 in turn, so that the harmful gases are adsorbed by the plurality of activated carbon filters 73, so that the air is sufficiently purified to the maximum.

It should be noted that, the primary filter screen 71, the HEPA filter screen 72 and the activated carbon filter screen 73 may be replaced by other filter screens, for example, the primary filter screen 71 may be replaced by a polyester fiber filter screen, the HEPA filter screen 72 may be replaced by a ULPA filter screen, the activated carbon filter screen 73 may be replaced by a photo-catalytic filter screen, and the method may be flexibly selected according to practical application environments.

Further, as shown in fig. 3, the upper and lower sides of the primary filter screen 71, the HEPA filter screen 72 and the activated carbon filter screen 73 are respectively connected to the opposite surfaces of the adjacent blades corresponding to the spiral blade 5, and the left and right sides of the activated carbon filter screen 73 are respectively abutted against the outer circumferential surface of the tube body 4 and the inner circumferential surface of the cylinder body 2.

In this alternative embodiment, as the spiral blade 5 has a plurality of blades from bottom to top, as shown in fig. 3, the spiral blade 5 in this embodiment may be regarded as being formed by connecting 4 blades in turn, and is sequentially marked as a first blade, a second blade, a third blade and a fourth blade from bottom to top, the adjacent blades of the spiral blade 5 refer to two blades closest to top to bottom, a plurality of primary filter screens 71 are disposed between the first blade and the second blade, a plurality of HEPA filter screens 72 are disposed between the second blade and the third blade, a plurality of activated carbon filter screens 73 are disposed between the third blade and the fourth blade, and it should be noted that, because the surfaces of the first blade, the second blade, the third blade and the fourth blade are cambered surfaces instead of being flat surfaces, in order to ensure that the peripheral sides of the primary filter screen 71, the HEPA filter screen 72 and the activated carbon filter screen 73 are connected with the outer peripheral surface of the pipe body 4, the inner peripheral surface of the cylinder body 2 and the opposite surfaces of the adjacent blades corresponding to the spiral blades 5, a plurality of slots can be arranged on the opposite surfaces of the first blade and the second blade, the opposite surfaces of the second blade and the third blade and the opposite surfaces of the third blade and the fourth blade, the upper side and the lower side of the primary filter screen 71, the HEPA filter screen 72 and the activated carbon filter screen 73 are respectively and slidably inserted into the corresponding slots, and the left side and the right side of the activated carbon filter screen 73 are respectively abutted to the outer peripheral surface of the pipe body 4 and the inner peripheral surface of the cylinder body 2, so that air can sequentially pass through the plurality of primary filter screens 71, the plurality of HEPA filter screens 72 and the plurality of activated carbon filter screens 73, and the condition that a small amount of air passes through the slots to reduce the filtering times is avoided, so that each primary filter screen 71, the active filter screen, both HEPA screen 72 and activated carbon screen 73 can adequately filter air.

In other alternative embodiments, as shown in fig. 6 and 8, the windward sides of the primary filter screen 71 and the activated carbon filter screen 73 may be in a shape of a raised arc, so as to increase the air intake area and improve the filtering efficiency, and as shown in fig. 7, the windward side of the HEPA filter screen 72 may be in a shape of waves, so as to increase the surface area and improve the filtering efficiency.

Optionally, as shown in fig. 2 and fig. 4, the air purifier with the back-inclined fan arranged below and with top air outlet further comprises an ultraviolet lamp 6, the tube body 4 is made of quartz glass, a hollow cavity 43 is arranged in the tube body 4, the ultraviolet lamp 6 is arranged in the hollow cavity 43, and the ultraviolet lamp 6 and the tube body 4 are coaxially arranged.

In this optional embodiment, the extending direction of ultraviolet lamp 6 is along the Z axle direction in the figure, and ultraviolet lamp 6 extends to the interior lower part of body 4, so, ultraviolet lamp 6 can carry out the comprehensive irradiation to spiral air flue, when the air flows with the spiral route in spiral air flue, can prolong the irradiation time to the air to can fully disinfect to microorganism in the air, improve the disinfection effect of disinfecting.

Optionally, as shown in fig. 2 and 3, the upper portion of the pipe body 4 is provided with a water inlet hole 41, the peripheral surface of the lower portion of the pipe body 4 is further provided with a plurality of water outlet holes 42, one end of each water outlet hole 42 is communicated with the hollow cavity 43, the other end of each water outlet hole 42 faces the primary filter screen 71, and a one-way valve 8 is arranged in each water outlet hole 42.

In this alternative embodiment, the hollow cavity 43 is integrally formed in the tube body 4, and the hollow cavity 43 is gradually narrowed from top to bottom, so as to ensure that the water can be sprayed out by the water outlet 42 near the lower portion, one end of the water outlet 42 is communicated with the hollow cavity 43, and the other end of the water outlet 42 faces the primary filter screen 71, in other words, the water outlet 42 is located on the tube body 4 between the first blade and the second blade, because the air passes through the primary filter screen 71 first, the large particle impurities on the primary filter screen 71 are more, so that the clean water is injected into the water inlet 41 to spray the clean water from the water outlet 42 to the primary filter screen 71, thereby flushing the large particles such as dust, hair, dander and the like on the primary filter screen 71, and the sewage after flushing flows down along the spiral air passage, so that the primary filter screen 71 can be cleaned without lifting the whole cylinder 2, and the convenience of cleaning the primary filter screen 71 is improved.

Optionally, in combination with fig. 2 and 3, a nano titanium oxide coating is provided on the surface of the spiral blade 5 and/or the inner circumferential surface of the cylinder 2.

In this optional embodiment, the nano titanium dioxide coating can be coated on the surface of the spiral blade 5, can be coated on the inner peripheral surface of the cylinder 2, can also be coated on the surface of the spiral blade 5 and the inner peripheral surface of the cylinder 2, and can decompose organic pollutants in air by utilizing a photocatalytic reaction through irradiation of the nano titanium dioxide coating by the ultraviolet lamp 6, so that the quality of the purified air is further improved.

Optionally, as shown in fig. 2, the air purifier with the top air outlet arranged below the back-rake fan further comprises a supporting mechanism 10, the supporting mechanism 10 comprises a supporting ring 101 and a supporting rod 102, one end of the supporting rod 102 is connected to the inner bottom surface of the casing 1, the other end of the supporting rod 102 is connected to the supporting ring 101, and the supporting ring 101 is used for supporting the cylinder 2. In this way, the cylinder 2 can be stably supported inside the housing 1 by the carrier ring 101.

Optionally, as shown in fig. 1 and 2, the air extraction mechanism 3 includes a back rake fan 31, a casing 32 and an air extraction tube 33, the casing 32 is connected to the inner bottom surface of the casing 1, and the top of the casing 32 is communicated with the cylinder 2, the back rake fan 31 is connected in the casing 32, the air inlet side of the back rake fan 31 is arranged downward, the air outlet side of the back rake fan 31 is arranged upward, a plurality of through holes 11 are arranged at the lower edge of the outer surface of the casing 1, one ends of the air extraction tubes 33 are respectively communicated with the through holes 11, and the other ends of the air extraction tubes 33 are respectively communicated with the lower part of the inner cavity of the casing 32.

In this alternative embodiment, the plurality of air extraction pipes 33 may be uniformly distributed, so that air in all directions is sucked, the air inlet side of the back-rake fan 31 is arranged downward, and the air is sucked through the plurality of air extraction pipes 33 and then discharged into the bottom of the inner cavity of the cylinder 2 toward the air outlet side of the back-rake fan 31.

It should be noted that, the back rake fan 31 refers to a centrifugal fan, and is characterized in that the blades of the impeller are inclined backward, the impeller of the back rake fan 31 rotates under the driving of the motor, the air intake side of the back rake fan 31 sucks air and forms air flow, and the air flow is accelerated and flows out to the air outlet side due to the back rake design of the impeller.

Optionally, as shown in fig. 2, the top surface of the housing 1 is provided with an upper cover 12, the upper cover 12 is connected to the top surface of the barrel 2, the top surfaces of the upper cover 12 and the barrel 2 are provided with a plurality of air outlet holes, the bottom of the barrel 2 is narrowed to form an air inlet 21, the air inlet 21 extends into the supporting ring 101 and is communicated with the upper portion of the inner cavity of the housing 32, a step portion is formed between the air inlet 21 and the barrel 2, and the step portion is used for being abutted to the upper surface of the supporting ring 101.

In this alternative embodiment, the top surfaces of the upper cover 12 and the barrel 2 are provided with a plurality of air outlet holes, so that purified air can be discharged, and a handle can be arranged on the upper surface of the upper cover 12, so that the upper cover 12 and the barrel 2 can be lifted out of the housing 1 from the supporting ring 101 together, and the primary filter screen 71, the HEPA filter screen 72 and the activated carbon filter screen 73 can be cleaned or replaced conveniently.

Further, as shown in fig. 2 and 5, the air extraction pipe 33 is arranged obliquely, the lower end of the air extraction pipe 33 is communicated with the through hole 11, the upper end of the air extraction pipe 33 is communicated with the lower part of the inner cavity of the shell 32, and the coarse screen 9 is arranged in the lower end of the air extraction pipe 33.

In this optional embodiment, the coarse filter mesh 9 may be plugged into the lower end of the air extraction pipe 33, thereby avoiding that large particle impurities near the ground are extracted into the air extraction pipe 33, during cleaning, the coarse filter mesh 9 is scratched out of the air extraction pipe 33, water is sprayed into the primary filter screen 71 from the water outlet hole 42, the flushed water flows down into the shell 32 along the spiral air flue, thereby flushing the blades on the back-inclined fan 31, and it is required that the back-inclined fan 31 has a certain waterproof effect, cleaning blades can improve the efficiency of the subsequent operation of the back-inclined fan 31, the flushed water enters the air extraction pipe 33, and because the air extraction pipe 33 is obliquely arranged, water can flow to the lower end of the air extraction pipe 33, thereby flushing the impurities in the air extraction pipe 33, improving the air inlet quantity of the air extraction pipe 33, and repeatedly flushing for several times until the water finally flows out of the air extraction pipe 33 is clear, at this time, the blades of the primary filter screen 71, the back-inclined fan 31 and the air extraction pipe 33 are cleaned to a certain extent, the frequency of the whole shell 1 can be reduced, or the actual filter screen 71 needs to be replaced after the primary filter screen 71 is cleaned, and the actual filter screen 71 needs to be replaced, and the primary filter screen 1 needs to be cleaned, and the cleaning time is improved, and the primary filter screen 1 needs to be replaced.

Although the invention is disclosed above, the scope of the invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and such changes and modifications would fall within the scope of the invention.

Claims

1. An air purifier with a backward-angled fan placed at the bottom and air outlet at the top, characterized by comprising:

Housing (1);

A cylinder (2), the cylinder (2) being arranged inside the outer shell (1);

An air extraction mechanism (3), the air extraction mechanism (3) being arranged at the inner bottom of the outer shell (1), and the air outlet of the air extraction mechanism (3) being in communication with the bottom of the cylinder (2);

A tube body (4), the tube body (4) being arranged inside the cylinder body (2), and the tube body (4) and the cylinder body (2) being arranged coaxially;

A spiral blade (5), wherein the inner circumference of the spiral blade (5) abuts against the outer circumference of the tube body (4), and the outer circumference of the spiral blade (5) is connected to the inner circumference of the cylinder body (2), so that a spiral airway is formed in the cylinder body (2) for gas to flow in a spiral path;

A filter unit (7), wherein a plurality of the filter units (7) are arranged in the spiral airway from bottom to top along a spiral path.

2. The air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 1, characterized in that the filter unit (7) comprises a primary filter (71), a HEPA filter (72) and an activated carbon filter (73), and a plurality of the primary filters (71), a plurality of the HEPA filters (72) and a plurality of the activated carbon filters (73) are arranged from bottom to top along the spiral airway.

3. The air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 2 is characterized in that the four sides of the primary filter (71), the HEPA filter (72) and the activated carbon filter (73) are respectively connected to the outer peripheral surface of the tube body (4), the inner peripheral surface of the cylinder (2) and the opposite surfaces of the adjacent blades of the spiral blade (5).

4. The air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 3 is characterized by further comprising an ultraviolet lamp (6), the tube body (4) being made of quartz glass, and a hollow cavity (43) being provided in the tube body (4), the ultraviolet lamp (6) being arranged in the hollow cavity (43), and the ultraviolet lamp (6) being arranged coaxially with the tube body (4).

5. The air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 4, characterized in that a water inlet hole (41) is provided at the upper part of the tube body (4), and a plurality of water outlet holes (42) are also provided on the lower peripheral surface of the tube body (4), one end of the water outlet hole (42) is communicated with the hollow cavity (43), and the other end of the water outlet hole (42) faces the primary filter (71), and a one-way valve (8) is provided in the water outlet hole (42).

6. The air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 5, characterized in that a nano titanium dioxide coating is provided on the surface of the spiral blade (5) and/or the inner circumferential surface of the cylinder (2).

7. The air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 5, characterized in that it also includes a supporting mechanism (10), the supporting mechanism (10) includes a supporting ring (101) and a supporting rod (102), one end of the supporting rod (102) is connected to the inner bottom surface of the outer shell (1), and the other end of the supporting rod (102) is connected to the supporting ring (101), and the supporting ring (101) is used to support the cylinder (1).

8. An air purifier with a backward-angled fan placed at the bottom and air outlet at the top as claimed in claim 7, characterized in that the exhaust mechanism (3) comprises a backward-angled fan (31), a shell (32) and an exhaust pipe (33), the shell (32) is connected to the inner bottom surface of the outer shell (1), and the top of the shell (32) is connected to the cylinder (2), the backward-angled fan (31) is connected to the shell (32), and the air inlet side of the backward-angled fan (31) is arranged downward, and the air outlet side of the backward-angled fan (31) is arranged upward, and a plurality of through holes (11) are provided on the lower edge of the outer surface of the outer shell (1), one end of the plurality of exhaust pipes (33) are respectively connected to the through holes (11), and the other ends of the plurality of exhaust pipes (33) are respectively connected to the lower part of the inner cavity of the shell (32).

9. An air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 8, characterized in that an upper cover (12) is provided on the top surface of the outer shell (1), the upper cover (12) is connected to the top surface of the cylinder (2), the upper cover (12) and the top surface of the cylinder (2) are provided with a plurality of air outlet holes, the bottom of the cylinder (2) is narrowed to form an air inlet (21), the air inlet (21) extends into the support ring (101) and is connected to the upper part of the inner cavity of the shell (32), a step portion is formed between the air inlet (21) and the cylinder (2), and the step portion is used to abut against the upper surface of the support ring (101).

10. The air purifier with a backward-inclined fan at the bottom and air outlet at the top as claimed in claim 9, characterized in that the exhaust pipe (33) is arranged at an angle, the lower end of the exhaust pipe (33) is connected to the through hole (11), the upper end of the exhaust pipe (33) is connected to the lower part of the inner cavity of the shell (32), and a coarse filter (9) is provided in the lower end of the exhaust pipe (33).