Air purifier

Abstract

This utility model relates to an air purifier (1), comprising: a housing (10) defining an inner chamber (100), the inner chamber (100) including a first chamber (11) and a second chamber (12) in fluid communication; an air inlet (2) on the housing of the first chamber (11); an air outlet (3) on the housing of the second chamber (12); an airflow generator (5) in the second chamber (12); an airflow duct (41) in the first chamber (11) for guiding an airflow (20) from the air inlet (2); and a container (42) in the first chamber (11) for collecting objects separated from the airflow (20); wherein the airflow duct (41) extends from the air inlet (2) to an opening (420) of the container (42); and the airflow duct (41) is in fluid communication with the second chamber (12).

Description

Technical Field

[0001] This utility model relates to the field of air purification technology. In particular, this utility model relates to an air purifier for separating fur and / or hair from the air. Background Technology

[0002] Indoor air quality is crucial to people's health. Nowadays, more and more families keep companion animals such as dogs and cats. In homes, especially in areas where companion animals live or in cat and dog cafes, in addition to everyday pollutants, companion animal hair, fur, dust, and other pollutants are also widely present in the air. These pollutants from companion animal hair and dust are a significant factor contributing to poor indoor air quality.

[0003] Air purifiers are used to remove pollutants from indoor air and improve indoor air quality. Most indoor air purifiers can effectively filter particulate pollutants (including PM2.5, bacteria, viruses, etc.) by using mature high-efficiency particulate air (HEPA) filters or similar filters. However, when used to purify indoor air containing relatively large particles (such as fur or hair), these air purifiers become less efficient and encounter several problems. Large particles tend to adhere to each other, easily clogging filters or becoming stuck inside the device. This leads to frequent filter replacements, inconvenient disassembly and cleaning of components, and a shorter lifespan for both the filter and the device. Therefore, more powerful and efficient air purifiers are needed.

[0004] This invention was developed to address the aforementioned problems with air purifiers in the field. The purpose of this invention is to provide an air purifier that improves the removal of large particles (such as hair and fur) from the air while still efficiently filtering other indoor pollutants, thus significantly improving indoor air quality. Utility Model Content

[0005] This utility model relates to an air purifier, comprising:

[0006] A shell defining an inner cavity, the inner cavity comprising a first chamber and a second chamber, and the two chambers being in fluid communication;

[0007] An air inlet on the housing of the first chamber;

[0008] An air outlet on the housing of the second chamber;

[0009] An airflow generator in the second chamber;

[0010] An airflow duct in the first chamber for guiding the airflow from the air inlet; and

[0011] A container in the first chamber is used to collect objects separated from the airflow;

[0012] The airflow duct extends from the air inlet to the opening of the container; and

[0013] The airflow duct is in fluid communication with the second chamber.

[0014] The air purifier of this invention includes a housing defining an inner chamber. The inner chamber includes a first chamber and a second chamber. The first and second chambers are in fluid communication with each other, allowing air to flow from one chamber to the other. Preferably, the second chamber is vertically positioned above the first chamber.

[0015] Preferably, the air purifier housing includes a first housing defining a first chamber and a second housing defining a second chamber. Preferably, the second housing is disposed on top of the first housing in a vertical direction. Preferably, the first housing and the second housing are detachably connected.

[0016] The casing of an air purifier can have any shape. For example, the casing of an air purifier can be shaped like a box or a cylinder.

[0017] The air purifier preferably includes a pet-accommodating space, such as a pet bed or pet-friendly platform. Preferably, the pet-accommodating space is located on the top surface of the housing.

[0018] The air purifier of this invention includes an air inlet located on the housing of a first chamber for drawing in air. The air inlet can be located on either side of the housing of the first chamber. Preferably, the air inlet is located on the front side of the housing of the first chamber. The air inlet is substantially flat and substantially rectangular or square in shape. Preferably, the air inlet occupies at least 50% of the surface area of ​​one side of the housing of the first chamber. The air purifier may include additional air inlets on the housing of the first chamber.

[0019] The air purifier of this invention includes an air outlet located on the housing of a second chamber for discharging air. The air outlet can be located on either side of the housing of the second chamber. The air outlet is substantially flat and substantially rectangular or square in shape. The air purifier may include additional air outlets located on the housing of the second chamber.

[0020] The air guide is preferably placed at the air outlet to adjust the tilt angle of the air exit. The air guide can be fixed or adjustable from 0 to 60 degrees (horizontal or vertical).

[0021] In this invention, air drawn into the air purifier through the air inlet enters an airflow duct in the first chamber. The airflow duct extends from a first end connected to the air inlet to a second end connected to the opening of the container. Preferably, the airflow duct extends horizontally from the air inlet to the opening of the container. Alternatively and preferably, the airflow duct extends vertically from the air inlet to the opening of the container. Preferably, the airflow duct is disposed on the bottom plate of the first chamber. Alternatively and preferably, the airflow duct is disposed on the side plate of the first chamber.

[0022] The airflow duct is in fluid communication with the second chamber. Preferably, the airflow path extends from the airflow duct to the second chamber. Preferably, the airflow path extends from an opening portion of the airflow duct to the second chamber. The opening portion is a joint between the airflow duct and the airflow path in the airflow direction. The size of the opening portion of the airflow duct can vary. Preferably, the airflow path is a branch duct of the airflow duct that extends from the opening portion of the airflow duct to the second chamber. Preferably, the airflow duct is an airflow channel communicating with the second chamber.

[0023] We have been surprised to find that by providing the air purifier of this invention, large particles entrained in the airflow tend to maintain their original direction of motion, while the rest of the airflow is redirected in different directions by the force generated by the airflow generator.

[0024] Preferably, the airflow duct extends from the air inlet to the opening of the container along a first direction, and the airflow path extends from the air duct to the second chamber along a second direction; and the first and second directions are not coplanar. Preferably, the first and second directions are perpendicular and not coplanar. An angle is formed between a first plane defined by the first direction and a second plane defined by the second direction. This angle is greater than 0 degrees and less than 180 degrees, preferably 10 to 170 degrees, more preferably 20 to 160 degrees.

[0025] In one preferred embodiment, the airflow duct extends horizontally from the air inlet to the opening of the container, and the airflow path extends vertically from the opening of the airflow duct to the second chamber. In another preferred embodiment, the airflow duct extends vertically from the air inlet to the opening of the container, and the airflow path extends horizontally from the opening of the airflow duct to the second chamber.

[0026] Large particles that maintain their original direction of motion will stop due to friction and kinetic energy loss. We have surprisingly discovered that by providing an airflow duct with a cross-sectional area that decreases from large to small in the direction of airflow, a velocity difference can be created, causing the airflow to start slowly and then accelerate. The velocities of different objects in the airflow increase upon entering the airflow duct, causing larger particles to be thrown against the inner wall of the duct and better separated from the airflow.

[0027] Preferably, the cross-sectional area of ​​the first half of the airflow duct gradually decreases in the direction of airflow. Most preferably, the cross-sectional area of ​​the airflow duct gradually decreases from the first end to the second end.

[0028] We also surprisingly discovered that by providing a curved structure to a portion of the inner wall of the airflow duct, objects with large particle sizes can minimize their kinetic energy loss when colliding with the inner wall of the airflow duct, thus allowing them to smoothly enter the container. This curved structure allows these objects to separate and aggregate more effectively.

[0029] Preferably, a portion of the inner wall of the airflow duct includes a curved structure. More preferably, the inner wall of the second half of the airflow duct includes a curved structure in the airflow direction. Even more preferably, the entire inner wall of the airflow duct is a curved structure. Most preferably, the airflow duct is an arc-shaped duct.

[0030] Preferably, the curved structure of the airflow duct smoothly connects to the opening of the container. Preferably, the curved structure is an involute arc.

[0031] In one preferred embodiment, a portion of the inner wall of the airflow duct is an involute arc and smoothly connects to the container opening. In another preferred embodiment, the airflow duct is an arc-shaped channel, and the cross-sectional area of ​​the airflow duct gradually decreases from the first end to the second end. In yet another preferred embodiment, the cross-sectional area of ​​the first half of the airflow duct gradually decreases in the airflow direction, and the second half of the airflow duct includes a curved structure connecting to the container opening.

[0032] The container in the first chamber can be of any shape. The container is preferably detachable from the device. This allows the user to remove it from the device body and drain the collected objects from the container. Preferably, the container is in the form of a detachable box, bag, or drawer. The container can be made of any material. Preferably, the container is made of a transparent material.

[0033] Preferably, the container includes a lid or cover in the direction of airflow. The lid or cover may include a pre-filter or a frame with a pre-filter. The container preferably also includes a separation wall projecting inward from the opening into the container. The separation wall can retain the collected objects in the container and prevent secondary contamination. The container may also be provided with other mechanisms for preventing secondary contamination, such as an inwardly projecting lid wall.

[0034] Preferably, the container is disposed on the bottom plate of the first chamber. Alternatively and preferably, the container is disposed on the side plate of the first chamber.

[0035] As used herein, the term "large particle size object" refers to an object in the air with a particle diameter greater than 0.01 micrometers. The term "particle size" as used herein refers to the average particle size measured by laser diffraction / scattering. Preferably, large particle size objects separated from the air have a particle diameter greater than 0.1 micrometers. Non-limiting examples of large particle size objects include dust, fur, hair, fibers, dandruff, and debris. Preferably, large particle size objects are fur and / or hair.

[0036] Preferably, the air purifier of this invention includes a separation unit in fluid communication with a second chamber within a first chamber, and an air inlet, an airflow duct, and a container are disposed within the separation unit. The separation unit can be detachably connected to the device. Preferably, the separation unit is a drawer, preferably covered with a pre-filter. Preferably, the separation unit is disposed on the bottom plate of the first chamber. Alternatively and preferably, the separation unit is disposed on the side plate of the first chamber.

[0037] The air purifier includes an airflow generator located in a second chamber. The airflow generator draws air from the first chamber into the second chamber. Preferably, the airflow generator is a fan or impeller. The fan can be an axial fan, a radial fan, or a mixed-flow fan. Preferably, the fan is a forward centrifugal fan or a backward centrifugal fan, more preferably a forward centrifugal fan.

[0038] Preferably, the purifier includes a fan duct in the second chamber for directing an air inlet from an airflow duct in the first chamber to a fan, and directing the airflow generated by the fan to an air outlet. The fan duct is flared outwards from its middle portion toward its two ends, and the fan is at least partially arranged in the middle portion.

[0039] Preferably, the air purifier also includes a pre-filter. The pre-filter is a low-resistance filter that also serves as a puncture-proof protector, preventing the user from contacting the volute or impeller assembly. Pre-filters are not intended to have any significant impact on air purification. They do not have the air resistance or particle entrainment capacity of dedicated particulate filters.

[0040] Preferably, the pre-filter is disposed upstream of the second chamber of the device in the airflow direction. Preferably, the pre-filter is disposed between the airflow duct and the second chamber of the device in the airflow direction. More preferably, the pre-filter is disposed between the first and second chambers of the device. Alternatively and preferably, the pre-filter is provided as a cover for the separation unit in the airflow direction.

[0041] The air purifier also includes at least one filter medium. Preferably, the filter medium includes at least one of carbon, activated carbon, nonwoven fabric, thermoplastic, thermosetting material, porous foam, glass fiber, paper, high-bulk spunbond web, low-bulk spunbond web, meltblown mesh, and / or dual-mode fiber diameter meltblown media.

[0042] Preferably, the air purifier includes a removable filter media. Preferably, the removable filter media can be a particulate filter or a gas filter, or both. Preferably, the particulate filter is configured such that air flowing in the direction of airflow passes through it.

[0043] Preferably, the removable particulate filter is a high-efficiency particulate air (HEPA) filter. Particulate filters are contrasted with pre-filters or any existing dust filters. Pre-filters and dust filters are not considered HEPA filters because they do not exhibit the particulate capture capabilities of HEPA filters.

[0044] It should be understood that while the filter is an important part of an air purifier's function, air purifiers are not typically manufactured with filters installed. As used herein, the term "filter" refers to a filter that can be installed separately and is not necessarily included in the manufactured product. Preferably, the filter is pre-charged before being applied to the air purifier.

[0045] Preferably, the filter medium is positioned upstream of the airflow generator in the airflow direction. Preferably, the filter medium is positioned downstream of the pre-filter in the airflow direction. Preferably, the filter medium is positioned between the first and second chambers of the air purifier.

[0046] In a preferred embodiment, the air purifier of the present invention includes: a housing comprising a first housing defining a first chamber, the first housing being detachably connected to a second housing defining a second chamber, the two chambers being in fluid communication; an air outlet on the second housing; an airflow generator in the second chamber; a separation unit in the first chamber, the separation unit including an air inlet on the first housing, an airflow duct for guiding airflow from the air inlet; and a container for collecting objects separated from the airflow; a pre-filter disposed between the separation unit and the second chamber; and a filter medium disposed downstream of the pre-filter between the first and second chambers in the airflow direction; wherein the airflow duct extends from the air inlet to an opening in the container; and the airflow duct is in fluid communication with the second chamber.

[0047] The air purifier of this invention may also include an ionizer, an IFD (Intensive Field Dielectric) disinfection module, an ESP (Electrostatic Precipitator), a heater, a cooler, a humidifier, a dehumidifier, one or more processors, one or more sensors, a user interface, or other components known in the art.

[0048] Preferably, the air purifier also includes an ionizer. The ionizer used includes a emitting electrode and a receiving electrode. These are standard in the art, referring to electrodes capable of generating an ion field when subjected to an appropriate voltage. Typically, the voltage will be in the range of up to + / -20kV, but this depends on the location of the device. For example, in vehicles where electromagnetic interference needs to be managed, voltages of -10 to 10kV or + / -7kV are typically found.

[0049] The emitting electrode is preferably a point, a tip, or multiple tips or points, such as a brush, and is electrically connected to a voltage source. Preferably, the emitting electrode is within 20 cm of the nearest filter medium to be sterilized, more preferably 15 cm, particularly preferably 10 cm, and most preferably up to 5 cm, for sterilization when needed by immersing it in an ion cloud during ionizer activation. This distance is from the tip of the emitting electrode to the nearest portion of the filter medium, more specifically, the filtration portion of the filter medium, rather than, for example, the structural frame.

[0050] The receiving electrode is preferably an annular metal component, such that the resulting ion cloud is three-dimensional as ions are drawn away from the emitter and towards the receiver. Preferably, the receiving electrode is cage-shaped, extending away from the emitting electrode in the airflow direction. More preferably, the receiving electrode is arranged in a mesh pattern and extends toward the filter. This extension can be hemispherical or partially cylindrical, such that the receiving electrode is downstream of the emitting electrode in the airflow direction.

[0051] Preferably, the transmitter is centrally positioned between the ring-shaped receivers. The transmitter can be arranged to point towards or away from the airflow during use, but preferably, the transmitter is pointed towards the surface to be disinfected, such as an inner wall or filter media.

[0052] Preferably, the device includes an internal ionizer and an external ionizer. The external ionizer promotes the accumulation of household dust particles, while the internal ionizer promotes the capture of accumulated dust particles by a removable particulate filter. In both cases, ionization allows for a lower density filter medium and a lower air velocity (fan) speed. Preferably, the airflow generator is housed within a volute; more preferably, the ionizer is located at or near an outlet on the volute.

[0053] Preferably, the air purifier includes a humidity sensor. The humidity sensor may be part of the air purifier or a separate electronic device. Humidity sensors are known in the art and are commercially available from Sensirion. Suitable examples of humidity sensors include the SHT3x series.

[0054] Preferably, the air purifier includes a temperature sensor. Temperature sensors are known in the art and are commercially available from Sensirion. Suitable examples of temperature sensors include the STS3x series.

[0055] Preferably, the air purifier includes a particle sensor. The particle sensor may be part of the air purifier or part of a separate electronic device.

[0056] Preferably, the air purifier includes a carbon dioxide sensor. The carbon dioxide sensor may be part of the air purifier or part of a separate electronic device.

[0057] Preferably, the air purifier includes a volatile organic compound (VOC) sensor. The VOC sensor may be part of the air purifier or part of a separate electronic device.

[0058] Preferably, the system further includes a sensor for sensing the concentration of a specific gas in the ambient air. More preferably, the operating parameters of the system can be determined from the results obtained from the sensor.

[0059] The air purifier of this invention can be powered by any suitable power source, including an internal power source such as a battery and an external power source. This power source drives a motor, which in turn powers at least an airflow generator and an ionizer (if any). Attached Figure Description

[0060] Figure 1 This is a perspective view of the air purifier of this utility model.

[0061] Figure 2 This is an exploded perspective view of the air purifier of this utility model.

[0062] Figure 3 This is a horizontal cross-sectional view of the separation unit according to an embodiment of the present invention.

[0063] Figure 4 This is a perspective view of the separation unit according to an embodiment of the present invention.

[0064] Figure 5A This is a perspective view of a container according to an embodiment of the present invention.

[0065] Figure 5B yes Figure 5ACross-sectional view of the container.

[0066] Figure 5C yes Figure 5A Vertical cross-sectional view of the container.

[0067] Figure 6 This is an exploded vertical cross-sectional view of an air purifier according to an embodiment of the present invention.

[0068] Figure 7 This is an example diagram illustrating the airflow direction according to one embodiment of the present invention.

[0069] Figure 8 This is an example diagram showing the working state of an air purifier according to an embodiment of the present invention. Detailed Implementation

[0070] like Figure 1 As shown, the air purifier 1 includes a housing 10 having a first housing 101 defining a first chamber 11 and a second housing 102 defining a second chamber 12. The first housing 101 and the second housing 102 are detachably connected to each other. The two chambers 11 and 12 are in fluid communication, so air can flow from one chamber to the other. A pet bed 103 is located on the top side of the housing 10. An air inlet 2 is located on the front side of the first housing 101, and an air outlet 3 is located on the left side of the second housing 102. The air outlet 3 is provided with a plurality of air guides 30. A separation unit 4 including the air inlet 2, an airflow duct 41, and a drawer-type container 42 is provided in the first chamber 11 of the device 1. An LED 81 for indicating the indoor AQI is located on the front side of the housing 10.

[0071] Figure 2 This is an exploded perspective view of one embodiment of the air purifier of this utility model. A first housing 101 defines a first chamber 11, and a second housing 102 defines a second chamber 12. The second housing 102 is disposed vertically on top of the first housing 101. The two housings 101 and 102 are detachably connected. A filter medium 7 is disposed between the first chamber 11 and the second chamber 12, serving as a physical partition between the inner chambers 100.

[0072] In the first chamber 11, a drawer-type separation unit 4 is provided, comprising an air inlet 2, an airflow duct 41, and a container 42. The drawer-type separation unit 4 is disposed on the bottom plate of the first chamber 11. A pre-filter 43 is provided as the cover of the drawer-type separation unit 4. The air inlet 2 is disposed on the front side of the first housing 101 and occupies more than 50% of the front surface area. The airflow duct 41 extends horizontally from the air inlet 2 to the opening of the container 42. The airflow duct 41 is an arc-shaped channel in fluid communication with the second chamber 12. In the second chamber 12, a fan 5 is provided to draw air into the second chamber 12. An air outlet 3 is disposed on the left side of the second chamber 12.

[0073] like Figure 3 As shown, a separation unit 4, including an air inlet 2, an airflow duct 41, and a container 42, is disposed in a first chamber 11. The airflow duct 41 is an arc-shaped channel that extends from a first end 411 connected to the air inlet 2 to a second end 412 connected to the opening 420 of the container 42. The inner wall of the second half of the airflow duct 41 includes a curved structure 413, which is an involute arc and smoothly connects to the opening 420 of the container 42.

[0074] exist Figure 4 The air purifier 1 includes a separation unit 4 comprising an air inlet 2, an airflow duct 41, and a container 42. The separation unit 4 is in the form of a drawer removable from the first housing 101 of the air purifier 1. The airflow duct 41 extends horizontally from the air inlet 2 to an opening 420 in the container 42. The inner wall of the airflow duct 41 includes a curved structure 413 that smoothly connects to the opening 420 of the container 42. The container 42 is a separation drawer within the separation unit 4. The container 42 has a lid 421, which includes a pre-filter 423. The pre-filter 423 is configured as the lid of the separation unit 4.

[0075] Figures 5A to 5C Different views of a container according to one embodiment of the present invention are shown. Container 42 is a drawer that can be pulled out from the separation unit 4 and the air purifier 1. Container 42 includes a lid 421 in the direction of airflow. Lid 421 includes a frame 422, which includes a pre-filter 423. Container 42 also includes a separation wall 424 projecting inwardly from an opening 420 into container 42. Separation wall 424 can retain collected objects in container 42 and prevent secondary contamination.

[0076] like Figure 5BAs shown, the separation wall 424 has a smooth curve and is designed to incrementally / gradually decrease the size of the opening 420, thereby preventing significant pressure drops. The inner end 4240 of the separation wall 424 forms two gaps 4241, 4242 from the inner end 4240 to the inner wall of the container 42. These two gaps 4241, 4242 have similar dimensions to ensure that collected fur and hair do not clog the area at 4241 or 4242. Figure 5C As shown, the lid 421 of container 42 has an inwardly protruding lid wall 4211 to further prevent secondary contamination.

[0077] Figure 6 This is an exploded vertical sectional view of another embodiment of the present invention. The air purifier 1 has a first housing 101 defining a first chamber 11 and a second housing 102 defining a second chamber 12. The two housings 101 and 102 are detachably connected to each other, and the two chambers are in fluid communication. The first chamber 11 is located on the left side of the second chamber 12. In the first chamber 11, an air inlet 21 is located on the front side of the housing 101, and another air inlet 22 is located on the rear side of the housing 102. A first airflow duct 411 is configured to extend from the first air inlet 21 to a first opening 4201 in a container 4201; and a second airflow duct 412 is configured to extend from the second air inlet 22 to a second opening 4202 in the container 4202. The first and second air ducts 411 and 412 are both arc-shaped air channels provided on a vertically extending side plate of the first housing 101, in fluid communication with the second chamber 12 on the right side. A fan is provided in the second chamber 12. An air outlet 3 is provided on the second housing 102.

[0078] Figure 7 The airflow direction of one embodiment of the present invention is shown. Airflow 20, drawn into the air purifier 1 from the air inlet 2, enters the airflow duct 41. An airflow path 60 is formed extending from the opening 410 of the airflow duct 41 to the second chamber 12. Larger particles in the airflow 20 maintain their original motion and flow along the first direction 61, while the remainder of the airflow 20 is redirected to a second direction 62 by the force generated by the airflow generator 5. An angle 63 is formed between a first plane defined by the first direction 61 and a second plane defined by the second direction 62. The angle 63 can range from greater than 0 degrees to less than 180 degrees. In this embodiment, the angle 63 is approximately 60 degrees.

[0079] like Figure 8As shown, when the air purifier 1 of this invention is working, air is drawn into the device through the air inlet 2. The airflow 20 enters the airflow duct 41, where large particles maintain their original motion and flow in the first direction 61. The airflow duct 41 is an arc-shaped air passage communicating with the second chamber. Then, large particles, such as fur and hair, are thrown against the inner wall 413 of the airflow duct 41 and enter the container 42 through the opening 420. The remaining airflow 20 is redirected in the second direction 62 by the force generated by the airflow generator 5 and enters the second chamber 12. In this way, large particles in the air are separated and collected in the container 42. The container 42 is a drawer so that the user can empty the collected items, such as hair and fur, from the container 42 and put them back into the device.

Claims

1. An air purifier (1) characterized by, The air purifier includes: A housing (10) defining an inner chamber (100) including a first chamber (11) and a second chamber (12) in fluid communication; Air inlet (2) on the housing of the first chamber (11); Air outlet (3) on the housing of the second chamber (12); Airflow generator (5) in the second chamber (12); An airflow duct (41) in the first chamber (11) is used to guide the airflow (20) from the air inlet (2); and A container (42) in the first chamber (11) is used to collect objects separated from the airflow (20); The airflow duct (41) extends from the air inlet (2) to the opening (420) of the container (42); and the airflow duct (41) is in fluid communication with the second chamber (12).

2. The air purifier (1) according to claim 1, characterized in that The air purifier also includes an airflow path (60) extending from the airflow duct (41) to the second chamber (12).

3. The air purifier (1) according to claim 2, characterized in that The airflow duct (41) extends along a first direction (61), and the airflow path (60) extends along a second direction (62); the first direction (61) and the second direction (62) are not coplanar.

4. The air cleaner (1) according to claim 3, characterized in that The first direction (61) and the second direction (62) are perpendicular to each other.

5. The air purifier (1) according to any of the preceding claims, characterized in that, The airflow duct (41) extends in the horizontal direction.

6. The air purifier (1) according to any one of claims 1-4, characterized in that, The cross-sectional area of ​​the airflow duct (41) gradually decreases in the direction of airflow.

7. The air purifier (1) according to any one of claims 1-4, characterized in that, A portion of the inner wall of the airflow duct (41) includes a curved structure (413).

8. The air purifier (1) according to claim 7, characterized in that The curved structure (413) of the airflow duct smoothly connects to the opening (420) of the container (42).

9. The air purifier (1) according to any one of claims 1-4, characterized in that, The airflow duct (41) is an arc-shaped channel.

10. The air purifier (1) according to any one of claims 1-4, characterized in that, The container (42) is provided with a lid (421) including a pre-filter.

11. The air purifier (1) according to any one of claims 1-4, characterized in that, The air inlet (2), the air flow duct (41) and the container (42) are disposed in the drawer-type separation unit (4) in the first chamber (11).

12. The air purifier (1) according to any one of claims 1-4, characterized in that, The air purifier also includes a pre-filter.

13. The air purifier (1) according to claim 12, characterized in that The pre-filter is disposed between the airflow duct (41) and the second chamber (12).

14. The air purifier (1) according to any one of claims 1-4, characterized in that, The air purifier also includes at least a filter medium (7).

15. The air purifier (1) according to claim 14, characterized in that The filter medium is disposed between the first chamber (11) and the second chamber (12).

16. The air cleaner (1) according to claim 14, characterized in that The filter medium (7) is a HEPA filter.

17. The air purifier (1) according to any of claims 1-4, characterized by The air purifier also includes a pet-friendly space.

18. The air purifier (1) according to claim 17, characterized in that The pet-accommodating space is located on the top surface of the housing (10).

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