Air purifier

Abstract

The utility model provides an air purifier which comprises a shell provided with an airflow channel, and the airflow channel penetrates through the two opposite sides of the shell; the condensation filter screen is arranged at the air inlet end of the airflow channel and is used for uniformly distributing and condensing the inlet airflow; the composite filter element is arranged in the airflow channel, located between the air inlet end and the air outlet end of the airflow channel and used for filtering liquid pollutants, aerosol particles and gas pollutants in the condensed airflow; the fan is arranged at the air outlet end of the airflow channel, and the fan is used for guiding airflow to flow in from the air inlet end of the airflow channel and to be discharged from the air outlet end of the airflow channel; wherein the airflow channel is linear. According to the air purifier, the airflow backflow probability can be effectively reduced, the turbulent flow energy generation rate is greatly reduced, and airflow flows more smoothly in the airflow channel, so that airflow around the air purifier smoothly flows into the airflow channel, the smoke escape amount can be effectively reduced, and the oil smoke purification efficiency is improved.

Description

air purifier Technical Field

[0001] This application relates to the field of oil fume purification technology, and more particularly to an air purifier. Background Technology

[0002] A desktop air purifier is a small, portable kitchen fume treatment device designed for homes and small restaurants. It can be placed directly near the stove to purify cooking fumes in real time.

[0003] However, due to limitations in current technology, traditional desktop air purifiers generally adopt a design architecture where the air intake direction is perpendicular to the air outlet direction. This structure easily leads to intermittent turbulence in the airflow channel, causing local smoke escape and significantly affecting the overall oil fume purification efficiency. Summary of the Invention

[0004] This application provides an air purifier to solve the problem of low oil fume purification efficiency in related technologies. The technical solution is as follows:

[0005] This application provides an air purifier, including:

[0006] A housing having an airflow channel extending through opposite sides of the housing;

[0007] A condenser filter is provided at the air inlet end of the airflow channel, and the condenser filter is used to uniformly distribute and condense the incoming airflow.

[0008] A composite filter element is disposed within the airflow channel, located between the air inlet and outlet ends of the airflow channel. The composite filter element is used to filter liquid contaminants, aerosol particles, and gaseous contaminants from the condensed airflow.

[0009] A fan is provided at the air outlet end of the airflow channel, and the fan is used to guide airflow from the air inlet end of the airflow channel and from the air outlet end of the airflow channel.

[0010] The airflow channel is linear.

[0011] In one embodiment, the composite filter element includes:

[0012] Oil-water separator filter element, the oil-water separator filter element being used to filter liquid contaminants in the condensed airflow; and

[0013] The origami filter element and the oil separator filter element are arranged sequentially along the airflow direction of the airflow channel. The origami filter element is used to filter aerosol particles and gaseous pollutants in the airflow after it has been treated by the oil separator filter element.

[0014] In one embodiment, the oil separator filter element includes multiple wet curtain papers, which are arranged sequentially along the airflow direction perpendicular to the airflow channel. An air passage is formed between each pair of adjacent wet curtain papers, and the air passage is connected to the airflow channel. The cross-section of the wet curtain paper is corrugated.

[0015] In one embodiment, the fan is a backward-curved fan.

[0016] In one embodiment, the housing includes:

[0017] The outer casing has a cavity;

[0018] The middle shell is connected to the outer shell and is located in the cavity. The middle shell has a first positioning groove that communicates with the cavity. The first positioning groove is arranged around the center line of the airflow channel and is adapted to the composite filter element.

[0019] A front housing, connected to the middle housing, located within the cavity, having a second positioning groove communicating with the cavity, the second positioning groove being arranged around the centerline of the airflow channel, and adapted to the condenser filter; and

[0020] The volute is connected to the outer shell and is located inside the cavity. The volute has an air outlet channel that connects the first positioning groove and the outside. The air outlet channel, the first positioning groove, and the second positioning groove form the airflow channel. The fan is located inside the air outlet channel.

[0021] In one embodiment, the air outlet channel has an expansion section at one end near the first positioning groove, and the cross-section of the expansion section gradually increases along the airflow direction of the airflow channel.

[0022] In one embodiment, the housing further includes:

[0023] The rear cover is connected to the volute and covers the air outlet of the airflow channel. The rear cover is provided with a fixing part and an air outlet grille. The fixing part is connected to the fan. The air outlet grille is arranged around the fixing part and has multiple air outlets. The multiple air outlets are spaced apart and connect the air outlet of the airflow channel to the outside.

[0024] In one embodiment, the outer shell is provided with an air inlet grille located within the cavity, the air inlet grille dividing the cavity into a front cavity and a rear cavity, the front cavity accommodating the middle shell and the front shell, and the rear cavity accommodating the volute, the air inlet grille having multiple air inlets spaced apart, the air inlets connecting the first positioning groove and the air outlet channel.

[0025] In one embodiment, the air intake grille has a first connection hole;

[0026] The middle shell has a second connecting hole, which is connected to the first connecting hole by a first fastener to connect the middle shell and the outer shell together.

[0027] In one embodiment, the middle shell is provided with a first magnetic attraction element;

[0028] The front shell is provided with a second magnetic chuck, which cooperates with the first magnetic chuck to connect the front shell and the middle shell together;

[0029] And / or, the housing has a third connection hole;

[0030] The volute has a fourth connecting hole, which is connected to the third connecting hole via a second fastener to connect the volute and the outer shell together.

[0031] The advantages or beneficial effects of the above technical solutions include at least the following:

[0032] This air purifier utilizes a straight airflow channel design, ensuring that the airflow direction within the channel is parallel to the wall surface. This avoids flow separation caused by curved or abrupt structural changes. Furthermore, the relatively constant cross-sectional area of ​​the straight airflow channel results in a smooth pressure change along the airflow direction, reducing airflow resistance. It also effectively reduces the probability of airflow backflow and significantly lowers the turbulence energy generation rate, thus allowing for smoother airflow within the channel. Therefore, under the action of the fan, it ensures that the airflow around the air purifier flows smoothly into the airflow channel, effectively reducing the amount of flue gas escaping. The airflow within the channel passes sequentially... The condenser filter and composite filter element are ultimately discharged from the air outlet of the airflow channel by the fan. The condenser filter can uniformly condense and treat the airflow, reducing aerodynamic noise and wind resistance caused by airflow turbulence. At the same time, it can also lower the temperature of the subsequent composite filter element when it comes into contact with the polluted airflow, thereby improving filtration efficiency and the life of the composite filter element. The composite filter element can filter liquid pollutants, aerosol particles and gaseous pollutants in the condensed airflow, thereby achieving water and oil separation, filtering particulate matter, volatile organic pollutants and odors. The combination of the condenser filter and the composite filter element can achieve highly efficient purification of oil fumes in the airflow, effectively improving the oil fume purification efficiency.

[0033] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0034] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0035] Figure 1 is a three-dimensional structural diagram of the air purifier of this utility model;

[0036] Figure 2 is a cross-sectional view of the air purifier of this utility model;

[0037] Figure 3 is an exploded view of the air purifier of this utility model;

[0038] Figure 4 is a three-dimensional structural diagram of the outer shell in this utility model;

[0039] Figure 5 is a cross-sectional view of the outer shell of this utility model;

[0040] Figure 6 is a three-dimensional structural diagram of the middle shell in this utility model;

[0041] Figure 7 is a three-dimensional structural diagram of the front shell in this utility model;

[0042] Figure 8 is a three-dimensional structural diagram of the volute in this utility model;

[0043] Figure 9 is a schematic diagram of the assembly of the housing and the fan in this utility model;

[0044] Figure 10 is an exploded view of the structure shown in Figure 9;

[0045] Figure 11 is a cross-sectional view of the structure shown in Figure 9.

[0046] Figure Labels

[0047] 1. Shell; 11. Outer shell; 111. Cavity; 1111. Front cavity; 1112. Rear cavity; 112. Air inlet grille; 1121. Air inlet; 1122. First connecting hole; 113. Third connecting hole; 114. First reinforcing rib; 12. Middle shell; 121. First positioning groove; 122. Second connecting hole; 123. First mounting groove; 124. Second reinforcing rib; 13. Front shell; 131. Second positioning groove; 132. Second mounting groove; 133. Third reinforcing rib; 4. Volute; 141. Air outlet channel; 1411. Expansion section; 142. Fourth connecting hole; 143. Fifth connecting hole; 144. Fourth reinforcing rib; 15. Airflow channel; 16. Rear cover; 161. Fixing part; 162. Air outlet grille; 1621. Air outlet; 163. Sixth connecting hole; 2. Condensate filter; 3. Composite filter element; 31. Oil separator filter element; 311. Wet curtain paper; 312. Air passage; 32. Folded paper filter element; 4. Fan; 41. Impeller; 42. Motor. Detailed Implementation

[0048] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0049] Referring to Figures 1-11, an air purifier according to a preferred embodiment of the present invention is shown, comprising:

[0050] The housing 1 has an airflow channel 15 that runs through the opposite sides of the housing 1. It can be understood that the opposite sides of the housing 1 can be the left and right sides, the front and back sides, or the top and bottom sides of the housing 1.

[0051] Condensation filter 2 is located at the air inlet end of airflow channel 15 and is used to uniformly distribute and condense the incoming airflow.

[0052] Composite filter element 3 is disposed within airflow channel 15, located between the air inlet and outlet ends of airflow channel 15. Composite filter element 3 is used to filter liquid pollutants, aerosol particles, and gaseous pollutants in the condensed airflow; and

[0053] Fan 4 is located at the air outlet of airflow channel 15. Fan 4 is used to guide airflow from the air inlet of airflow channel 15 and from the air outlet of airflow channel 15.

[0054] Among them, the airflow channel 15 is straight, that is, the airflow channel 15 is a direct flow structure, which allows the airflow to move in a straight line or approximately in a straight line.

[0055] The air purifier of this invention employs a straight airflow channel 15 design, ensuring that the airflow direction within the channel 15 is parallel to the wall surface. This avoids flow separation caused by curved or abrupt structural changes. Simultaneously, the relatively constant cross-sectional area of ​​the straight airflow channel 15 results in a smooth pressure change along the airflow direction, reducing airflow resistance. Furthermore, it effectively reduces the probability of airflow backflow and significantly lowers the turbulence energy generation rate, thus allowing for smoother airflow within the channel 15. Therefore, under the action of the fan 4, it ensures that the airflow around the air purifier flows smoothly into the airflow channel 15, effectively reducing the amount of flue gas escaping. The airflow within the airflow channel 15 sequentially passes through… The airflow passes through the condenser filter 2 and the composite filter element 3, and is finally discharged from the outlet of the airflow channel 15 by the fan 4. The condenser filter 2 can uniformly condense and treat the airflow, reducing aerodynamic noise and wind resistance caused by airflow turbulence. At the same time, it can also reduce the temperature of the subsequent composite filter element 3 when it comes into contact with the polluted airflow, thereby improving the filtration efficiency and lifespan of the composite filter element 3. The composite filter element 3 can filter liquid pollutants, aerosol particles and gaseous pollutants in the condensed airflow, thereby achieving water and oil separation, filtering particulate matter, volatile organic pollutants and odors. The combination of the condenser filter 2 and the composite filter element 3 can achieve efficient purification of oil fumes in the airflow, effectively improving the oil fume purification efficiency.

[0056] In one embodiment, the condenser filter 2 is composed of multiple layers of perforated metal sheets, which plays a role in uniformly distributing and pre-treating the intake airflow, thereby reducing aerodynamic noise caused by airflow turbulence and excessive local wind resistance, and lowering the temperature of the subsequent composite filter element 3 in contact with the polluted airflow, thereby improving filtration efficiency and lifespan of the composite filter element 3.

[0057] Referring to Figure 2, in one embodiment, the composite filter element 3 includes:

[0058] The oil-water separator 31 is used to filter liquid contaminants in the condensed airflow, removing water and oil droplets to ensure that the filtration effect of the subsequent paper filter 32 is not affected by oil and water, thus extending its service life.

[0059] Origami filter element 32 and oil separator filter element 31 are arranged sequentially along the airflow direction of airflow channel 15. Origami filter element 32 is used to filter aerosol particles and gaseous pollutants in the airflow after being treated by oil separator filter element 31, thereby filtering particulate matter, volatile organic pollutants, and odors from the airflow after water and oil separation. Among them, oil separator filter element 31 removes liquid pollutants (such as water droplets and oil droplets) through mechanical interception (such as inertial impaction and fiber adsorption), reducing the liquid load on subsequent ovarian filter element 32, while ovarian filter element 32 focuses on treating aerosol particles and gaseous pollutants (such as particulate matter, volatile organic pollutants, and odors), realizing staged filtration treatment, ensuring that each filter element works under optimal conditions, and effectively improving filtration efficiency.

[0060] Referring to Figure 2, in one embodiment, the oil-separating filter element 31 includes multiple wet curtain paper 311s arranged sequentially along the airflow direction perpendicular to the airflow channel 15. An air passage 312 is formed between each two adjacent wet curtain paper 311s, and the air passage 312 is connected to the airflow channel 15. The cross-section of the wet curtain paper 311 is corrugated, that is, the wet curtain paper 311 has a corrugated structure, which gives the wet curtain paper 311 better structural strength while also playing a certain role in uniformly distributing the intake airflow. It can absorb water and oil while maintaining structural stability and strength, thereby preventing local airflow turbulence, removing water and oil from the condensed airflow, removing water and oil droplets from the airflow, ensuring that the filtration effect of the subsequent folded filter element 32 is not affected by oil and water, and extending its service life.

[0061] In one embodiment, the origami filter element 32 is made by folding and gluing multiple layers of composite origami. The main filter layers include, but are not limited to, meltblown cloth, filter cotton, carbon fiber cloth, carbon fiber, ceramic filter membrane, etc., and its main function is to filter particulate matter, volatile organic pollutants, odors, etc.

[0062] In one embodiment, the fan 4 is a backward-curved fan 4, wherein the fan 4 includes an impeller 41 and a motor 42. The output end of the motor 42 is connected to the impeller 41, and the impeller 41 can rotate with the output end of the motor 42. The backward-curved fan 4 means that the top of the blades of the impeller 41 is bent backward, forming a certain angle with the direction of rotation. The backward-curved fan 4 can reduce the resistance generated by the friction between the impeller 41 and the air, and can further reduce the probability of the occurrence of local airflow turbulence, thereby further improving the purification efficiency.

[0063] For ease of installation, referring to Figures 3-11, in one embodiment, the housing 1 includes:

[0064] The outer casing 11 has a cavity 111;

[0065] The middle shell 12 is connected to the outer shell 11 and is located inside the cavity 111. The middle shell 12 has a first positioning groove 121, which is connected to the cavity 111. The first positioning groove 121 is arranged around the center line of the airflow channel 15. The first positioning groove 121 is adapted to the composite filter element 3, that is, the composite filter element 3 and the first positioning groove 121 cooperate to realize the installation and positioning of the composite filter element 3, ensuring that the composite filter element 3 is accurately aligned during installation, avoiding offset or loosening, thereby ensuring that the composite filter element 3 can be stably installed on the shell 1.

[0066] Front shell 13, connected to middle shell 12, located within cavity 111, has a second positioning groove 131 communicating with cavity 111. The second positioning groove 131 is positioned around the centerline of airflow channel 15 and is adapted to condenser filter 2. That is, condenser filter 2 cooperates with the second positioning groove 131 to achieve accurate installation and positioning of condenser filter 2, ensuring accurate alignment during installation and preventing misalignment or loosening, thereby ensuring stable installation of condenser filter 2 on shell 1; and

[0067] The volute 14 is connected to the outer shell 11 and is located within the cavity 111. The volute 14 has an air outlet channel 141, which connects to the first positioning groove 121 and the outside. The air outlet channel 141 is arranged around the centerline of the airflow channel 15. The air outlet channel 141, the first positioning groove 121, and the second positioning groove 131 form the airflow channel 15. The fan 4 is located within the air outlet channel 141. The sequential connection of the outer shell 11, middle shell 12, front shell 13, and volute 14 forms a modular assembly structure, simplifying the installation process and reducing the risk of tolerance accumulation. Furthermore, since the air outlet channel 141 (volute 14), the first positioning groove 121 (middle shell 12), and the second positioning groove 131 (front shell 13) together form a continuous airflow channel 15, turbulence and pressure loss can be reduced, improving airflow efficiency. 。

[0068] Referring to Figures 10 and 11, in one embodiment, the end of the air outlet duct 141 near the first positioning groove 121 has an expansion section 1411. The cross-section of the expansion section 1411 gradually increases along the airflow direction of the airflow channel 15 to form a conical expansion structure, which can increase the airflow diffusion area at the fan 4, make the airflow decelerate evenly, reduce airflow impact and eddy generation, thereby significantly reducing operating noise. At the same time, it can also reduce the airflow resistance at the air inlet end of the air outlet duct 141, reduce energy loss, and thus reduce the energy consumption of the motor 42.

[0069] In one embodiment, the wall of the expansion section 1411 is arc-shaped to reduce airflow friction resistance and further reduce operating noise.

[0070] Referring to Figures 10-11, in one embodiment, the housing 1 further includes:

[0071] The rear cover 16 is connected to the volute 14 and covers the air outlet of the airflow channel 15. The rear cover 16 is provided with a fixing part 161 and an air outlet grille 162. The fixing part 161 is connected to the fan 4. Specifically, the fixing part 161 is connected to the motor 42 in the fan 4 to facilitate fixing the motor 42. The air outlet grille 162 is arranged around the fixing part 161 and has multiple air outlets 1621. The multiple air outlets 1621 are spaced apart and connect the air outlet of the airflow channel 15 to the outside. The rear cover 16 has a fixing part 161 that is directly connected to the fan 4, ensuring that the fan 4 is firmly installed, reducing operating vibration, and extending its service life. In addition, since the rear cover 16 covers the air outlet of the airflow channel 15, it can prevent foreign objects from entering and protect internal components (such as the impeller 41) from interference. It can also prevent users from accidentally touching the impeller 41 and getting injured, thus providing protection. Furthermore, the airflow is dispersed by multiple spaced air outlets 1621, which can avoid local high pressure or noise caused by concentrated airflow. In addition, the connection design between the rear cover 16 and the volute 14 facilitates disassembly and maintenance. In summary, the rear cover 16 integrates the functions of fixing the fan 4, guiding the airflow, and providing protection, which simplifies the structure and saves space.

[0072] Referring to Figure 4, in one embodiment, the outer casing 11 is provided with an air inlet grille 112, which is located inside the cavity 111. The air inlet grille 112 divides the cavity 111 into a front cavity 1111 and a rear cavity 1112. The front cavity 1111 accommodates the middle shell 12 and the front shell 13, and the rear cavity 1112 accommodates the volute 14. The air inlet grille 112 has multiple air inlets 1121, which are spaced apart. The air inlets 1121 connect to the first positioning groove 121 and the air outlet channel 141. That is, the air inlet grille 112 serves to separate the composite filter element 3 and the fan 4, preventing accidental contact with the impeller 41 by fingers when replacing the composite filter element 3, thus providing a safety protection function.

[0073] Referring to Figures 4 and 5, in one embodiment, the inner wall of the front cavity 1111 is provided with a plurality of first reinforcing ribs 114. The plurality of first reinforcing ribs 114 are arranged at intervals around the center line of the airflow channel 15. The plurality of first reinforcing ribs 114 can abut against the outer wall of the middle shell 12 to increase the structural strength of the outer shell 11, ensuring that the outer shell 11 can stably support the middle shell 12 and the front shell 13. At the same time, it can install and position the middle shell 12 to ensure accurate centering during installation.

[0074] Referring to Figures 4 and 6, in one embodiment, the air intake grille 112 has a first connection hole 1122;

[0075] The middle shell 12 has a second connection hole 122, which is connected to the first connection hole 1122 by a first fastener, so as to connect the middle shell 12 and the outer shell 11 together.

[0076] Specifically, the head of the first fastener abuts against the middle shell 12, and the rod of the first fastener passes through the second connecting hole 122 and is screwed to the first connecting hole 1122 to facilitate the disassembly and assembly of the middle shell 12, thereby improving the disassembly and assembly efficiency of the composite filter element 3 and making it easier to replace the composite filter element 3.

[0077] Referring to Figure 6, in one embodiment, the outer wall of the middle shell 12 is provided with a plurality of second reinforcing ribs 124. The plurality of second reinforcing ribs 124 are arranged around the first positioning groove 121 to increase the structural strength of the middle shell 12, prevent the middle shell 12 from deforming, and ensure that the middle shell 12 can stably support the composite filter element 3.

[0078] Referring to Figures 6 and 7, in one embodiment, the middle shell 12 has a first mounting groove 123, and a first magnetic attraction element (not shown in the figure) is provided in the first mounting groove 123;

[0079] The front housing 13 has a second mounting groove 132, and a second magnetic suction member is provided in the second mounting groove 132. The second magnetic suction member cooperates with the first magnetic suction member to connect the front housing 13 and the middle housing 12 together, which can realize tool-free disassembly and assembly of the front housing 13, greatly improving the disassembly and assembly efficiency of the front housing 13, thereby greatly improving the disassembly and assembly efficiency of the condenser filter 2 and making it more convenient to replace the condenser filter 2.

[0080] Referring to Figure 7, in one embodiment, the outer wall of the front shell 13 is provided with a plurality of third reinforcing ribs 133. The plurality of third reinforcing ribs 133 are arranged around the second positioning groove 131 to increase the structural strength of the front shell 13, prevent the front shell 13 from deforming, and ensure that the front shell 13 can stably support the condenser filter 2.

[0081] Referring to Figures 4-5 and 8, the housing 11 has a third connection hole 113;

[0082] The volute 14 has a fourth connection hole 142, which is connected by a second fastener and a third connection hole 113 to facilitate connecting the volute 14 and the outer shell 11 together.

[0083] Specifically, the head of the second fastener abuts against the outer shell 11, and the rod of the second fastener passes through the third connecting hole 113 and is screwed to the fourth connecting hole 142, so as to reliably connect the volute 14 and the outer shell 11 together. At the same time, it can reduce the difficulty of disassembling and assembling the volute 14, making the disassembly and assembly of the volute 14 more convenient.

[0084] Referring to Figures 8 and 10, in one embodiment, the volute 14 has a fifth connecting hole 143, and the rear cover 16 has a sixth connecting hole 163. The sixth connecting hole 163 is connected to the fifth connecting hole 143 by a third fastener to connect the rear cover 16 and the volute 14 together.

[0085] Specifically, the head of the third fastener abuts against the volute 14, and the rod of the third fastener passes through the fifth connecting hole 143 and is screwed to the sixth connecting hole 163, so as to reliably connect the rear cover 16 and the volute 14 together. At the same time, it can reduce the difficulty of disassembling and assembling the rear cover 16, making the disassembly and assembly of the rear cover 16 more convenient.

[0086] Referring to Figure 8, in one embodiment, the volute 14 is provided with a fourth reinforcing rib 144, which surrounds the air inlet end of the air outlet channel 141 to strengthen the structural strength at the air inlet end of the air outlet channel 141 and prevent the air outlet channel 141 from deforming.

[0087] Referring to Figure 8, in one embodiment, there are multiple fourth reinforcing ribs 144, which are arranged at intervals along a direction perpendicular to the airflow direction. Adjacent fourth reinforcing ribs 144 are connected together by fifth reinforcing ribs to further strengthen the structural strength of the air inlet end of the air outlet duct 141.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0090] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air purifier, characterized in that, include: The system comprises: a housing having an airflow channel extending through opposite sides; a condenser filter located at the air inlet of the airflow channel for condensing the incoming airflow; a composite filter element located within the airflow channel, between the air inlet and outlet, for filtering liquid contaminants, aerosol particles, and gaseous contaminants from the condensed airflow; and a fan located at the air outlet of the airflow channel for guiding the airflow from the air inlet to the air outlet; wherein the airflow channel is linear.

2. The air purifier according to claim 1, characterized in that, The composite filter element includes: an oil-water separator for filtering liquid contaminants in the condensed airflow; and a paper-folding filter element, wherein the paper-folding filter element and the oil-water separator are arranged sequentially along the airflow direction of the airflow channel, and the paper-folding filter element is used to filter aerosol particles and gaseous contaminants in the airflow treated by the oil-water separator.

3. The air purifier according to claim 2, characterized in that, The oil separator filter element includes multiple wet curtain paper sheets, which are arranged sequentially along the airflow direction perpendicular to the airflow channel. An air passage is formed between each pair of adjacent wet curtain paper sheets, and the air passage is connected to the airflow channel. The cross-section of the wet curtain paper sheet is corrugated.

4. The air purifier according to claim 1, characterized in that, The fan is a backward-curved fan.

5. The air purifier according to claim 1, characterized in that, The housing includes: an outer shell having a cavity; a middle shell connected to the outer shell and located within the cavity, the middle shell having a first positioning groove communicating with the cavity, the first positioning groove being arranged around the center line of the airflow channel, and the first positioning groove being adapted to the composite filter element; a front shell connected to the middle shell and located within the cavity, the front shell having a second positioning groove communicating with the cavity, the second positioning groove being arranged around the center line of the airflow channel, and the second positioning groove being adapted to the condenser filter; and a volute connected to the outer shell and located within the cavity, the volute having an air outlet channel communicating with the first positioning groove and the outside, the air outlet channel being arranged around the center line of the airflow channel, the air outlet channel, the first positioning groove, and the second positioning groove forming the airflow channel, and the fan being located within the air outlet channel.

6. The air purifier according to claim 5, characterized in that, The air outlet channel has an expansion section at one end near the first positioning groove, and the cross-section of the expansion section gradually increases along the airflow direction of the airflow channel.

7. The air purifier according to claim 5, characterized in that, The housing further includes: a rear cover, which is connected to the volute and covers the air outlet of the airflow channel. The rear cover is provided with a fixing part and an air outlet grille. The fixing part is connected to the fan. The air outlet grille is arranged around the fixing part and has multiple air outlets. The multiple air outlets are spaced apart and the air outlets connect the air outlet of the airflow channel to the outside.

8. The air purifier according to claim 5, characterized in that, The outer shell is provided with an air inlet grille, which is located in the cavity and divides the cavity into a front cavity and a rear cavity. The front cavity accommodates the middle shell and the front shell, and the rear cavity accommodates the volute. The air inlet grille has multiple air inlets, which are spaced apart. The air inlets are connected to the first positioning groove and the air outlet channel.

9. The air purifier according to claim 8, characterized in that, The air intake grille has a first connecting hole; the middle shell has a second connecting hole, which is connected to the first connecting hole by a first fastener to connect the middle shell and the outer shell together.

10. The air purifier according to claim 5, characterized in that, The middle shell is provided with a first magnetic chuck; the front shell is provided with a second magnetic chuck, the second magnetic chuck and the first magnetic chuck cooperate to connect the front shell and the middle shell together; and / or, the outer shell has a third connecting hole; the volute has a fourth connecting hole, the fourth connecting hole is connected to the third connecting hole through a second fastener to connect the volute and the outer shell together.

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