Filter assembly and cooking fume purification machine

Abstract

The application provides a filtering assembly and a cooking fume purification machine, and relates to the technical field of household appliances. The filtering assembly comprises a filter element and an annular mounting seat. The filter element comprises a first end and a second end. A hollow region is arranged in the filter element and communicates with the end face of the first end. The first end of the filter element is connected with the annular mounting seat. A flow guide hole penetrating through the upper and lower surfaces of the annular mounting seat is arranged in the middle part of the annular mounting seat, and the flow guide hole communicates with the hollow region. The edge of the flow guide hole is provided with an air inlet baffle ring extending away from the side of the filter element. The air inlet baffle ring and the annular mounting seat are arranged in an integrated structure, so that the vibration between the two is eliminated, and the working noise of the whole machine is reduced. Meanwhile, when the cooking fume purification machine is assembled and disassembled, the air inlet baffle ring does not need to be separately disassembled. When the filtering assembly is disassembled, the air inlet baffle ring structure is also disassembled, so that the disassembly time is saved, and the disassembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of household appliances, and in particular to a filter assembly and a countertop oil fume purifier. Background Technology

[0002] Countertop fume extractors can be placed on dining tables to extract and purify cooking fumes generated during secondary cooking. Existing countertop fume extractors consist of a housing, a filter, and a fan. The housing has an air inlet and an air outlet, with the filter and fan located in a flow channel between the inlet and outlet. Cooking fumes flow into the housing through the air inlet under the action of the fan, and are then discharged from the outlet after being purified by the filter.

[0003] In the prior art, a baffle ring is set in front of the air inlet of the fan. The outer edge of the baffle ring is sealed to the inner wall of the housing. The baffle ring is located between the filter element and the fan. The central hole of the baffle ring forms an air concentrator. The air concentrator faces the filter element, thereby increasing the pressure of the airflow passing through the filter element.

[0004] The baffle ring, being a separate structure, needs to be connected separately to the housing. Firstly, this makes the air purifier's structure more complex and increases assembly time. Secondly, when disassembling and cleaning the air purifier, the baffle ring must be removed before the filter or fan can be disassembled, increasing disassembly time. Thirdly, there is a gap between the filter and the baffle ring, which causes noise when the machine is operating due to collisions between them. Summary of the Invention

[0005] The purpose of this invention is to provide a filter component and a countertop oil fume purifier to alleviate the technical problems of existing countertop oil fume purifiers, such as complex structure, troublesome installation and disassembly, and high noise during operation.

[0006] In a first aspect, an embodiment of the present invention provides a filter assembly, the filter assembly including a filter element and an annular mounting base, the filter element including a first end and a second end, the interior of the filter element having a hollow region communicating with the end face of the first end; the first end of the filter element is connected to the annular mounting base;

[0007] The annular mounting base has a flow guide hole in the middle that runs through its upper and lower surfaces and is connected to the hollow area; the edge of the flow guide hole is provided with an air inlet baffle ring that extends toward the side away from the filter element.

[0008] Furthermore, an oil receiving groove is provided on the side of the annular mounting base where the filter element is connected;

[0009] Along the radial direction of the annular mounting base, the oil receiving groove is located on the outer side of the filter element, and the oil receiving groove is used to collect oil stains flowing down from the outer wall of the filter element.

[0010] Furthermore, the bottom surface of the oil receiving groove is provided with an oil guide hole that penetrates the lower surface of the annular mounting base, and the bottom end of the oil guide hole is connected to a drainage structure, which is used to guide the oil into the oil receiving box.

[0011] Furthermore, the drainage structure includes a drainage tube or a drainage rod, the upper end of which is connected to the bottom end of the oil guide hole.

[0012] Furthermore, the bottom surface of the oil receiving groove is inclined, and the oil guide hole is located at the lowest position within the oil receiving groove.

[0013] Furthermore, the diameter of the air inlet baffle gradually decreases from the direction of the filter element toward the annular mounting base.

[0014] Furthermore, along the direction from the outside towards the hollow area, the filter element includes an oil fume purification layer, and an air purification layer and / or an odor purification layer located inside the oil fume purification layer.

[0015] Secondly, an embodiment of the present invention provides a countertop oil fume purifier, including the aforementioned filter components.

[0016] Furthermore, the countertop fume purifier also includes: a housing and a fan, wherein the housing has a flow channel, and the filter assembly and the fan are both located within the flow channel;

[0017] The outer circumferential side of the annular mounting base is connected to the inner circumferential sidewall of the housing, and divides the flow channel into a filter area and a fan area, which are connected through the flow guide hole; the fan is located in the fan area; the air inlet baffle faces the air inlet of the fan.

[0018] Furthermore, the housing includes a straight cylindrical structure and a curved cylindrical structure. The straight cylindrical structure includes a first opening and a second opening, and the curved cylindrical structure includes a third opening and a fourth opening. The second opening of the straight cylindrical structure is connected to the third opening of the curved cylindrical structure.

[0019] The annular mounting base is connected to the cylindrical structure, and along the direction from the first end of the filter element to the second end, the line connecting the center of the end face of the first end of the filter element and the center of the end face of the second end is inclined towards the direction of the fourth opening.

[0020] Furthermore, an air outlet is provided on the circumferential side wall of the cylindrical structure, and the air outlet and the fourth opening are spaced apart in the axial direction of the cylindrical structure.

[0021] Furthermore, a transverse oil guide groove is provided at the fourth opening of the bent cylinder structure. The transverse oil guide groove is located on the inner wall of the bent cylinder structure and extends along its circumferential direction. A vertical oil guide groove is also provided on the inner side wall of the bent cylinder structure. The upper end of the vertical oil guide groove is connected to the transverse oil guide groove, and the opening at the lower end of the vertical oil guide groove is used to guide oil into the oil receiving structure.

[0022] Furthermore, the lower end of the vertical oil guide groove is provided with an oil guide ramp groove that protrudes inward relative to the inner wall of the curved cylinder structure.

[0023] Furthermore, the countertop fume purifier includes a base and a turntable, the turntable being rotatably connected to the base, and the housing and the fan being connected to the turntable so that the air inlet of the housing can swing.

[0024] Furthermore, the countertop fume purifier also includes a drive mechanism, the fixed end of which is fixedly connected to the base, and the drive end of which is connected to the turntable. The drive mechanism is used to drive the turntable to rotate.

[0025] Furthermore, the countertop fume purifier includes a central controller, and fume detection devices are respectively installed on the left and right side walls of the air inlet of the housing. The central controller is connected to the fume detection devices and the drive mechanism respectively.

[0026] The oil fume detection device is used to detect the oil fume concentration, and the central controller is used to control the drive mechanism to rotate the air inlet of the housing to the side with higher oil fume concentration between the left and right sides of the air inlet.

[0027] Furthermore, the central controller is connected to the fan, and the central controller adjusts the airflow of the fan according to the larger value detected by the two oil fume detection devices.

[0028] Furthermore, a support structure is provided on one of the base and the turntable. The support structure is located between the base and the turntable, and is located radially outside the rotation axis of the turntable to prevent the turntable from tilting.

[0029] Furthermore, the support structure includes multiple protrusions.

[0030] Furthermore, one of the base and the turntable is provided with a plurality of protrusions, and the plurality of protrusions are located on the same circle;

[0031] Of the base and the turntable, the other is provided with an annular groove, the protrusion is located in the annular groove, and the top surface of the protrusion abuts against the bottom surface of the annular groove.

[0032] Furthermore, the top end face of the protrusion is spherical.

[0033] Furthermore, a grille is provided at the air inlet of the housing.

[0034] Furthermore, a filter screen is provided at the air inlet of the housing.

[0035] The filter assembly provided in this embodiment of the invention includes a filter element and an annular mounting base. The filter element has a first end and a second end. The interior of the filter element has a hollow region communicating with the end face of the first end. Airflow can flow from the circumferential outer side of the filter element, passing through the sidewall of the filter element, and then enter the hollow region. The first end of the filter element is connected to the annular mounting base. A guide hole penetrating its upper and lower surfaces is provided in the middle of the annular mounting base, and the guide hole communicates with the hollow region. Airflow entering the hollow region is discharged through the guide hole. An air inlet baffle ring extending away from the filter element is provided along the edge of the guide hole, facing the air inlet of the fan. The air inlet baffle ring forms a channel connecting the hollow region of the filter element and the air inlet of the fan. During the flow of air from the filter assembly to the fan, the air inlet baffle ring acts as a guide. In this design, the air inlet baffle and the annular mounting base are integrated into a single structure, eliminating vibration between the two and reducing the overall operating noise of the machine. Furthermore, when assembling and disassembling the countertop fume purifier, there is no need to separately disassemble the air inlet baffle; the baffle structure is removed along with the filter assembly, saving assembly and disassembly time and improving efficiency.

[0036] Secondly, the countertop fume purifier provided in this embodiment of the invention includes the aforementioned filter assembly. Because the countertop fume purifier provided in this embodiment of the invention uses the aforementioned filter assembly, it also possesses the advantages of the filter assembly. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 A schematic diagram of a filtering component provided in an embodiment of the present invention;

[0039] Figure 2 A cross-sectional view of a filtering component provided in an embodiment of the present invention;

[0040] Figure 3 for Figure 2 A magnified view of a portion of position A in the middle;

[0041] Figure 4 This is a front view of the countertop oil fume purifier provided in an embodiment of the present invention;

[0042] Figure 5 A side view of a countertop oil fume purifier provided in an embodiment of the present invention;

[0043] Figure 6 An exploded view of the countertop oil fume purifier provided in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the internal structure of the countertop oil fume purifier provided in an embodiment of the present invention;

[0045] Figure 8 for Figure 7 A magnified view of a portion of position B in the middle;

[0046] Figure 9 This is a schematic diagram of the internal airflow movement of the countertop fume purifier provided in an embodiment of the present invention;

[0047] Figure 10 A schematic diagram of the internal structure of the outer shell of the countertop oil fume purifier provided in an embodiment of the present invention;

[0048] Figure 11 for Figure 10 A magnified view of the area at position C in the middle;

[0049] Figure 12 This is a schematic diagram of the turntable, base, and stepper motor of the countertop oil fume purifier provided in an embodiment of the present invention.

[0050] Icons: 100-Filter assembly; 110-Filter element; 111-Hollow zone; 112-Fume purification layer; 113-Air purification layer; 114-Odor purification layer; 120-Annular mounting base; 121-Air inlet baffle; 122-Oil collection groove; 123-Slot structure; 130-Top cover; 140-Airflow drainage structure;

[0051] 200-Housing; 210-Straight cylinder structure; 220-Bent cylinder structure; 221-Horizontal oil guide groove; 222-Vertical oil guide groove; 223-Oil guide ramp groove; 230-Air outlet; 240-Card block; 250-Central controller; 300-Fan; 400-Base; 500-Turntable; 510-Slot; 520-Oil collection box; 600-Stepper motor; 700-Oil fume detection device; 810-Protrusion; 820-Circular groove; 910-Grate; 920-Filter screen; 930-Limit buckle. Detailed Implementation

[0052] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] like Figures 1-3 As shown, the filter assembly 100 provided in this embodiment of the invention includes a filter element 110 and an annular mounting base 120. The filter element 110 can be cylindrical, frustum-shaped, or conical; in this embodiment, the filter element 110 is frustum-shaped. The filter element 110 includes a first end and a second end. A hollow region 111 communicating with the end face of the first end is provided inside the filter element 110. Airflow can flow from the circumferential outer side of the filter element 110, pass through the sidewall of the filter element 110, and enter the hollow region 111. The first end of the filter element 110 is connected to the annular mounting base 120. A guide hole penetrating its upper and lower surfaces is provided in the middle of the annular mounting base 120, and the guide hole communicates with the hollow region 111. Airflow entering the hollow region 111 is discharged through the guide hole. The edge of the air guide hole is provided with an air inlet baffle ring 121 extending away from the filter element 110. The air inlet baffle ring 121 faces the air inlet of the fan 300. The air inlet baffle ring 121 can form a channel connecting the hollow area 111 of the filter element 110 and the air inlet of the fan 300. During the process of airflow from the filter assembly 100 to the fan 300, the air inlet baffle ring 121 plays a guiding role. In this solution, the air inlet baffle ring 121 and the annular mounting base 120 are set as an integral structure, eliminating the vibration between the two and reducing the operating noise of the whole machine. At the same time, when assembling and disassembling the countertop oil fume purifier, there is no need to disassemble the air inlet baffle ring 121 separately. When disassembling the filter assembly 100, the air inlet baffle ring 121 structure is removed together, saving disassembly and assembly time and improving disassembly and assembly efficiency.

[0054] The annular mounting base 120 has an annular positioning groove on its upper surface. The annular positioning groove corresponds to the annular structure on the first end face of the filter element 110, which facilitates the positioning and installation of the filter element 110. The filter element 110 and the annular mounting base 120 can be connected by adhesive.

[0055] like Figure 3 As shown, an oil receiving groove 122 is provided on the side of the annular mounting base 120 where the filter element 110 is connected; along the radial direction of the annular mounting base 120, the oil receiving groove 122 is located on the outer side of the filter element 110, and the oil receiving groove 122 is used to receive oil stains flowing down from the outer wall of the filter element 110.

[0056] The filter element 110 can filter oil stains in the fumes. The fumes flow from the outer periphery of the filter element 110 with the airflow, pass through the side wall of the filter element 110 and enter the hollow area 111. Under the action of the filter element 110, some of the oil stains are filtered down and adhere to the outer periphery of the filter element 110. After the oil stains accumulate, they slide down the side wall and enter the oil collecting groove 122, which can temporarily store the oil stains.

[0057] Furthermore, the bottom surface of the oil receiving groove 122 is provided with an oil guide hole that penetrates the lower surface of the annular mounting base 120. The bottom end of the oil guide hole is connected to a drainage structure 140, which can be a drainage rod or a drainage pipe. The upper end of the drainage rod or drainage pipe is connected to the bottom end of the oil guide hole, and the lower end of the drainage rod or drainage pipe points to the oil receiving box 520, for guiding oil into the oil receiving box 520.

[0058] like Figure 2 As shown, the oil in the oil collection tank 122 can be discharged from the oil guide hole into the oil collection box 520. In order to prevent the oil flowing out of the oil guide hole from flowing to the outside of the oil collection box 520, in this embodiment, a guide rod or guide pipe is connected to the bottom of the oil guide hole. The oil can flow into the oil collection box 520 along the outer wall of the guide rod or the hollow hole wall of the guide pipe.

[0059] Furthermore, the bottom surface of the oil receiving groove 122 is inclined, and the oil guide hole is located at the lowest position inside the oil receiving groove 122.

[0060] The bottom surface of the oil receiving groove 122 is inclined, and the depth of the oil receiving groove 122 changes continuously along its length. The oil guide hole is located at the lowest point of the oil receiving groove 122, which facilitates the oil in the oil receiving groove 122 to slide into the oil guide hole.

[0061] The diameter of the air inlet baffle 121 gradually decreases from the direction of the filter element 110 toward the annular mounting base 120.

[0062] The airflow flows from the outer periphery of the filter element 110, passes through the side wall of the filter element 110, and enters the hollow area 111. Then, after being converged by the gradually decreasing diameter air inlet baffle ring 121, it flows into the impeller of the fan 300. The air inlet baffle ring 121 can play the role of guiding and converging the airflow, thereby increasing the pressure of the oil fume extraction.

[0063] Along the direction from the outside towards the hollow region 111, the filter element 110 includes an oil fume purification layer 112, and an air purification layer 113 and / or an odor purification layer 114 located inside the oil fume purification layer 112.

[0064] like Figure 2As shown, the inner side of the fume purification layer 112 may only have an air purification layer 113 or only an odor purification layer 114; or, the inner side of the fume purification layer 112 may have both an air purification layer 113 and an odor purification layer 114. In this embodiment, from the outside to the inside, the filter element 110 sequentially includes an fume purification layer 112, an air purification layer 113, and an odor purification layer 114. After the fume passes through the fume purification layer 112, it is filtered out. The remaining airflow continues to flow inward, removing some particulate matter and pollutants from the air after passing through the air purification layer 113, and removing some odors from the air after passing through the odor purification layer 114. Specifically, the air purification layer 113 may be a HEPA dual-effect filter element 110 layer structure. In particular, the oil fume purification layer 112 can protect the air purification layer 113 and the odor purification layer 114, reduce the pollution of the air purification layer 113 and the odor purification layer 114 by oil, and extend the service life of the air purification layer 113 and the odor purification layer 114.

[0065] The filter element 110 is truncated cone-shaped, and a top cover 130 is provided at the second end of the filter element 110. The top cover 130 completely covers the upper ends of the oil fume purification layer 112, the air purification layer 113 and the odor purification layer 114 to prevent air leakage.

[0066] The countertop fume purifier provided in this embodiment of the invention includes the aforementioned filter assembly 100. Because the countertop fume purifier provided in this embodiment of the invention uses the aforementioned filter assembly 100, it also possesses the advantages of the filter assembly 100.

[0067] like Figures 4-6 As shown, the countertop fume purifier also includes a housing 200 and a fan 300. The housing 200 has an air inlet and an air outlet 230, and a flow guide channel inside the housing 200, which connects the air inlet and the air outlet 230. The filter assembly 100 and the fan 300 are both located within the flow guide channel. Airflow enters through the air inlet, flows sequentially through the filter assembly 100 and the fan 300, and then exits through the air outlet 230.

[0068] The outer circumferential side of the annular mounting base 120 is connected to the inner circumferential sidewall of the housing 200, and divides the flow channel into a filter area and a fan area. The filter area and the fan area are connected through the flow guide hole. The fan is located in the fan area, and the fan 300 is located below the filter assembly 100. The air inlet baffle 121 faces the air inlet of the fan 300.

[0069] The annular mounting base 120 and the housing 200 can be connected by a threaded connection or a snap-fit ​​connection. In this embodiment, a slot structure 123 is provided on the outer circumferential side of the annular mounting base 120, and a snap block 240 corresponding to the slot structure 123 can be provided on the inner circumferential sidewall of the housing 200.

[0070] like Figure 7 and Figure 8 As shown, specifically, an upwardly extending rim is provided on the outer side of the annular mounting base 120. A first groove is recessed downward on the top surface of the rim, and a second groove is recessed circumferentially along the rim on the side wall of the first groove. The first groove and the second groove form a slot structure 123. The first groove and the second groove form an "L" shape. When the annular mounting base 120 is inserted into the housing 200 from bottom to top, the locking block 240 first enters the first groove. Then, the annular mounting base 120 is rotated relative to the housing 200, and the locking block 240 can enter the second groove. The second groove can prevent the annular mounting base 120 from moving axially.

[0071] like Figure 6 As shown, the housing 200 includes a straight cylindrical structure 210 and a curved cylindrical structure 220. The straight cylindrical structure 210 includes a first opening and a second opening, and the curved cylindrical structure 220 includes a third opening and a fourth opening. The curved cylindrical structure 220 can be a curved cylinder bent at 90°, that is, the third opening and the fourth opening face at 90°. The second opening of the straight cylindrical structure 210 is connected to the third opening of the curved cylindrical structure 220. The annular mounting base 120 is connected to the straight cylindrical structure 210. Along the direction from the first end of the filter element 110 to the second end, the line connecting the center of the end face of the first end of the filter element 110 and the center of the end face of the second end is inclined towards the direction of the fourth opening.

[0072] The included angle between the third and fourth openings of the curved cylinder structure 220 can be between 80° and 100°. In this embodiment, the included angle is 90°. Because the top of the filter element 110 is inclined towards the fourth opening, the top of the filter element 110 can avoid the inner arc wall at the outer corner of the upper end of the curved cylinder structure 220, thereby allowing the filter element 110 to be set longer, achieving the goal of maximizing the filtration component within a limited space. The second end of the filter element 110 is higher than the straight cylinder structure 210 and is not on the extension path of the fourth opening, allowing the fumes to enter the cavity smoothly, reducing system resistance and improving the fume extraction effect.

[0073] An air outlet 230 is provided on the circumferential side wall of the cylindrical structure 210, and the orientation of the air outlet 230 is opposite to that of the fourth opening.

[0074] The air inlet is located on the front of the housing 200, while the air outlet 230 is located on the back of the housing 200. The fan 300 can be a rear-outward rotor centrifugal fan 300. The air outlet 230 and the fourth opening are spaced apart axially on the straight cylindrical structure 210. The air inlet and air outlet 230 are not at the same horizontal level and will not form convection. The housing 200 has a hollow area, and the through holes in the hollow area form the air outlet 230. The central angle corresponding to the hollow area is 100°-120° and does not generate ejection.

[0075] Furthermore, a transverse oil guide groove 221 is provided at the fourth opening of the bent cylinder structure 220. The transverse oil guide groove 221 is located on the inner wall of the bent cylinder structure 220 and extends along its circumferential direction. A vertical oil guide groove 222 is also provided on the inner side wall of the bent cylinder structure 220. The upper end of the vertical oil guide groove 222 is connected to the transverse oil guide groove 221, and the opening at the lower end of the vertical oil guide groove 222 is used to guide oil into the oil receiving structure.

[0076] like Figures 9-11 As shown, the transverse oil guide groove 221 is located on the inner wall of the curved cylinder structure 220 and at the fourth opening. After the oil fumes enter the fourth opening, they adhere to the inner wall and form oil stains. The oil stains can flow into the transverse oil guide groove 221 along the inner wall of the fourth opening. After the oil stains in the transverse oil guide groove 221 converge, they flow into the oil receiving structure along the vertical oil guide groove 222. The oil receiving structure can be the oil receiving groove 122 on the annular mounting base 120, or other additional structures for accommodating oil stains.

[0077] To prevent oil from flowing out of the vertical oil guide groove 222 and onto the inner wall of the curved cylinder structure 220, the lower end of the vertical oil guide groove 222 is located at the third opening of the curved cylinder structure 220, and the lower end of the vertical oil guide groove 222 is provided with an oil guide ramp groove 223 that protrudes inward relative to the inner wall of the curved cylinder structure 220. The oil flows inward along the oil guide ramp groove 223 and flows out from the end of the oil guide ramp groove 223 away from the second cylinder and drips into the oil receiving groove 122.

[0078] like Figure 12 As shown, the countertop fume purifier includes a base 400 and a turntable 500. The turntable 500 is rotatably connected to the base 400. The housing 200 and the fan 300 are both connected to the turntable 500 so that the air inlet of the housing 200 can swing.

[0079] The base 400 can be fixed on the countertop. By rotating the housing 200, the direction of the air inlet on the housing 200 can be changed, so that the air inlet of the housing 200 faces the smoke-generating position of the stove.

[0080] Furthermore, the countertop fume purifier also includes a drive mechanism, the fixed end of which is fixedly connected to the base 400, and the drive end of which is connected to the turntable 500. The drive mechanism is used to drive the turntable 500 to rotate.

[0081] The driving mechanism can be a stepper motor 600, which can be fixed on the base 400. The output shaft of the stepper motor 600 can have a polygonal cross-section, such as a hexagon. A slot 510 corresponding to the output shaft is provided on the bottom surface of the turntable 500. The slot 510 also has a polygonal cross-section, such as a hexagon. The polygonal output shaft and the polygonal slot 510 connect the output shaft to the turntable 500, allowing the turntable 500 to rotate under the drive of the output shaft. The driving mechanism can cause the turntable 500 to oscillate, thereby causing the air inlet of the housing 200 to oscillate within a certain range, creating a larger smoke extraction area.

[0082] Furthermore, the countertop fume purifier includes a central controller 250. Fume detection devices 700 are respectively installed on the left and right side walls of the air inlet of the housing 200. The central controller 250 is connected to the fume detection devices 700 and the drive mechanism, respectively. The fume detection devices 700 are used to detect the fume concentration, and the central controller 250 is used to control the drive mechanism to rotate the air inlet of the housing 200 to the side with the higher fume concentration between the left and right sides of the air inlet.

[0083] The central controller 250 can be a common controller available on the market and can be installed on the inner wall of the housing. The fume detection device 700 can detect the concentration of oil fumes and is existing technology. Oil fume detectors are installed on both the left and right sides of the air inlet. The central controller 250 can receive the values ​​detected by the two oil fume detectors and then compare them to determine whether the oil fume concentration is higher on the left or right side of the air inlet. When the difference between the two exceeds a preset value, the central controller 250 can control the drive mechanism to rotate the turntable 500, causing the air inlet to deflect towards the side with higher oil fume concentration, until the difference between the values ​​obtained by the two oil fume detectors 700 is less than or equal to the preset value. At this point, the housing 200 stops rotating. By detecting the oil fume concentration and adjusting the direction of the air inlet according to the oil fume concentration, concentrated smoke can be drawn in, improving purification efficiency.

[0084] Furthermore, the central controller 250 is connected to the fan 300. The central controller 250 adjusts the airflow of the fan 300 based on the larger of the values ​​detected by the two oil fume detection devices 700. After the air inlet is adjusted by swinging left and right according to the smoke concentration, the airflow of the fan 300 is adjusted according to the specific concentration of oil fumes. The higher the concentration, the greater the airflow of the fan 300; the lower the concentration, the smaller the airflow of the fan 300, thereby achieving the purpose of automatic airflow adjustment.

[0085] Of the base 400 and the turntable 500, one of them is provided with a support structure. The support structure is located between the base 400 and the turntable 500, and is located radially outside the rotation axis of the turntable 500 to prevent the turntable 500 from tilting.

[0086] like Figure 12 As shown, specifically, a support structure can be provided on the base 400. The support structure is located outside the output shaft of the drive structure, and it can prevent the turntable 500 from tilting. Specifically, the support structure can be multiple protrusions 810. In this embodiment, the number of protrusions 810 can be eight, and the eight protrusions 810 surround the radial outer side of the rotation shaft of the turntable 500. The eight protrusions 810 can be located on the same circle. A circular groove 820 can be provided on the lower surface of the turntable 500. The protrusions 810 are located within the circular groove 820, and the top surface of the protrusions 810 abuts against the bottom surface of the circular groove 820. The protrusions 810, located within the circular groove 820, can limit the turntable 500 and reduce the lateral pressure on the drive shaft of the stepper motor 600. The top end face of the protrusion 810 can be spherical to reduce the contact area between the protrusion 810 and the bottom surface of the circular groove 820, making the rotation of the turntable 500 smoother.

[0087] The protrusion 810 can be spherical, with a radius of R. Eight protrusions 810 are located on a circumference with a diameter of D1 and divide the circumference into eight equal parts, with a height of H (H = R + 0.5 mm). The inner diameter of the annular groove 820 is D2 (D2 = D1 - R), the outer diameter is D3 (D3 = D1 + R), and the depth is R.

[0088] An oil collection box 520 is provided on the turntable 500, and the oil collection box 520 is located below the diversion rod.

[0089] To prevent large impurities from entering the housing 200 and blocking the channels, a grille 910 is provided at the air inlet of the housing 200.

[0090] A filter screen 920 is provided at the air inlet of the housing 200. The filter screen 920 can perform primary filtration, reducing the filtration pressure of the filter assembly 100. The oil sludge filtered by the filter screen 920 can flow into the transverse oil guide groove 221. A limit buckle 930 is provided on the inner side wall of the air inlet of the housing 200. The filter screen 920 can be connected to the limit buckle 930, and the filter screen 920 is located between the limit buckle 930 and the grille 910.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filter assembly, characterized in that, The filter includes a filter element (110) and an annular mounting base (120). The filter element (110) includes a first end and a second end. The filter element (110) has a hollow region (111) inside that communicates with the end face of the first end. The first end of the filter element (110) is connected to the annular mounting base (120). The annular mounting base (120) has a flow guide hole in the middle that penetrates its upper and lower surfaces, and the flow guide hole is connected to the hollow region (111); the edge of the flow guide hole is provided with an air inlet baffle (121) extending toward the side away from the filter element (110). The annular mounting base (120) is located between the filter element (110) and the fan (300); the air inlet baffle (121) faces the air inlet of the fan (300), and the air inlet baffle (121) forms a channel connecting the hollow area (111) of the filter element and the air inlet of the fan (300). During the process of airflow from the filter assembly to the fan (300), the air inlet baffle (121) plays a guiding role.

2. The filter assembly according to claim 1, characterized in that, An oil receiving groove (122) is provided on the side of the annular mounting base (120) where the filter element (110) is connected. Along the radial direction of the annular mounting base (120), the oil receiving groove (122) is located on the outside of the filter element (110), and the oil receiving groove (122) is used to receive oil stains flowing down from the outer wall of the filter element (110).

3. The filter assembly according to claim 2, characterized in that, The bottom surface of the oil receiving groove (122) is provided with an oil guide hole that penetrates the lower surface of the annular mounting base (120). The bottom end of the oil guide hole is connected to a drainage structure (140), which is used to guide the oil into the oil receiving box (520).

4. The filter assembly according to claim 3, characterized in that, The drainage structure (140) includes a drainage pipe or a drainage rod, the upper end of which is connected to the bottom end of the oil guide hole.

5. The filter assembly according to claim 3, characterized in that, The bottom surface of the oil receiving groove (122) is inclined, and the oil guide hole is located at the lowest position inside the oil receiving groove (122).

6. The filter assembly according to any one of claims 1-5, characterized in that, The diameter of the air inlet baffle (121) gradually decreases from the direction of the filter element (110) toward the annular mounting base (120).

7. The filter assembly according to any one of claims 1-5, characterized in that, Along the direction from the outside toward the hollow region (111), the filter element (110) includes an oil fume purification layer (112), and an air purification layer (113) and / or an odor purification layer (114) located inside the oil fume purification layer (112).

8. A countertop oil fume purifier, characterized in that, Includes the filter assembly (100) as described in any one of claims 1-7.

9. The countertop oil fume purifier according to claim 8, characterized in that, The countertop fume purifier also includes: a housing (200) and a fan (300), wherein the housing (200) has a flow channel, and the filter assembly (100) and the fan (300) are both located within the flow channel; The outer circumferential side of the annular mounting base (120) is connected to the inner circumferential sidewall of the housing (200) and divides the flow channel into a filter area and a fan area, which are connected through the flow hole; the fan (300) is located in the fan area; the air inlet baffle (121) faces the air inlet of the fan (300).

10. The countertop oil fume purifier according to claim 9, characterized in that, The housing (200) includes a straight cylindrical structure (210) and a curved cylindrical structure (220). The straight cylindrical structure (210) includes a first opening and a second opening, and the curved cylindrical structure (220) includes a third opening and a fourth opening. The second opening of the straight cylindrical structure (210) is connected to the third opening of the curved cylindrical structure (220). The annular mounting base (120) is connected to the cylindrical structure (210). Along the direction from the first end of the filter element (110) toward the second end, the line connecting the center of the end face of the first end of the filter element (110) and the center of the end face of the second end is inclined toward the direction of the fourth opening.

11. The countertop oil fume purifier according to claim 10, characterized in that, An air outlet (230) is provided on the circumferential side wall of the cylindrical structure (210), and the air outlet (230) and the fourth opening are spaced apart in the axial direction of the cylindrical structure (210).

12. The countertop oil fume purifier according to claim 10, characterized in that, A transverse oil guide groove (221) is provided at the fourth opening of the bent cylinder structure (220). The transverse oil guide groove (221) is located on the inner wall of the bent cylinder structure (220) and extends along its circumferential direction. A vertical oil guide groove (222) is also provided on the inner side wall of the bent cylinder structure (220). The upper end of the vertical oil guide groove (222) is connected to the transverse oil guide groove (221), and the opening at the lower end of the vertical oil guide groove (222) is used to guide oil into the oil receiving structure.

13. The countertop oil fume purifier according to claim 12, characterized in that, The lower end of the vertical oil guide groove (222) is provided with an oil guide ramp groove (223) that protrudes inward relative to the inner wall of the curved cylinder structure (220).

14. The countertop oil fume purifier according to claim 9, characterized in that, The countertop fume purifier includes a base (400) and a turntable (500). The turntable (500) is rotatably connected to the base (400). The housing (200) and the fan (300) are both connected to the turntable (500) so that the air inlet of the housing (200) can swing.

15. The countertop oil fume purifier according to claim 14, characterized in that, The countertop fume purifier also includes a drive mechanism. The fixed end of the drive mechanism is fixedly connected to the base (400), and the drive end of the drive mechanism is connected to the turntable (500). The drive mechanism is used to drive the turntable (500) to rotate.

16. The countertop fume purifier according to claim 15, characterized in that, The tabletop fume purifier includes a central controller (250), and fume detection devices (700) are respectively installed on the left and right side walls of the air inlet of the housing (200). The central controller (250) is connected to the fume detection devices (700) and the drive mechanism respectively. The oil fume detection device (700) is used to detect the oil fume concentration, and the central controller (250) is used to control the drive mechanism to rotate the air inlet of the housing (200) to the side with higher oil fume concentration between the left and right sides of the air inlet.

17. The countertop oil fume purifier according to claim 16, characterized in that, The central controller (250) is connected to the fan (300), and the central controller (250) adjusts the air volume of the fan (300) according to the larger value detected by the two oil fume detection devices (700).

18. The countertop oil fume purifier according to claim 14, characterized in that, Of the base (400) and the turntable (500), one of them is provided with a support structure. The support structure is located between the base (400) and the turntable (500) and is located radially outside the rotation axis of the turntable (500) to prevent the turntable (500) from tilting.

19. The countertop oil fume purifier according to claim 18, characterized in that, The support structure includes multiple protrusions (810).

20. The countertop oil fume purifier according to claim 19, characterized in that, Of the base (400) and the turntable (500), one of them is provided with a plurality of protrusions (810), and the plurality of protrusions (810) are located on the same circle; Of the base (400) and the turntable (500), the other is provided with an annular groove (820), the protrusion (810) is located in the annular groove (820), and the top surface of the protrusion (810) abuts against the bottom surface of the annular groove (820).

21. The countertop oil fume purifier according to claim 20, characterized in that, The top end face of the protrusion (810) is spherical.

22. The countertop oil fume purifier according to claim 9, characterized in that, The air inlet of the housing (200) is provided with a grille (910).

23. The countertop oil fume purifier according to claim 9, characterized in that, A filter (920) is provided at the air inlet of the housing (200).

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