Air purifier

Abstract

The air purifier according to an embodiment of the present disclosure includes: a case having suction ports in the circumferential surface thereof; a blower fan disposed inside the case; a filter for removing airborne particles introduced into the suction ports; and discharge ports formed below the blower fan and the filter, wherein the air, from which the airborne particles have been removed, is discharged in a downward direction through the discharge ports such that the discharged air does not reach a user directly and cause discomfort, and allergens are effectively removed.

Description

air purifier

[0001] The present disclosure relates to an air purifier, and more particularly, to an air purifier with improved air purification performance.

[0002] An air purifier is a device that reduces dust and bacteria in a space by filtering and discharging the air within that space. An air purifier filters out foreign substances through the airflow within the space and expels the air free of these contaminants.

[0003] The air purifier can form an outlet at the top and cause the filtered air discharged upward to flow in all directions to quickly increase the cleanliness of the indoor space.

[0004] Additionally, when forming an outlet on the upper side, a separate fan for wind direction control can be placed on the upper side to send the filtered air to a long distance.

[0005] Prior art document 1 (Korean Patent Publication No. KR10-2020-0112592) discloses an air purifier with an outlet formed at the top of the product.

[0006] Prior art document 2 (Korean Patent Publication No. KR10-2017-0140578) discloses an air purifier in which blower devices are arranged in a vertical direction and an outlet is formed at the top and center of the product.

[0007] The air purifiers in the previous literature had an upward discharge airflow, so the discharge airflow directly reached the user, causing discomfort, and there was a limit to removing large, heavy particles that would settle.

[0008] The problem that the present disclosure seeks to solve is to provide an air purifier that can prevent the exhaust airflow from directly reaching the user and causing discomfort.

[0009] The problem that the present disclosure seeks to solve is to provide an air purifier capable of forming an airflow that effectively removes large and heavy particles.

[0010] The problem that the present disclosure seeks to solve is to provide an air purifier capable of forming an airflow that effectively removes allergen substances that cause allergies.

[0011] The problem that the present disclosure seeks to solve is to provide an air purifier that can improve air purification performance for large particles while maintaining air purification performance for small particles.

[0012] An air purifier according to an embodiment of the present disclosure can prevent the discharged airflow from directly reaching the user and causing discomfort by discharging clean air from the bottom of the product.

[0013] An air purifier according to an embodiment of the present disclosure can effectively remove allergen substances by forming an airflow at a height where allergen substances that cause allergies are mainly located.

[0014] An air purifier according to one embodiment of the present disclosure includes a case having an intake port formed on a peripheral surface, a blower fan disposed inside the case, a filter for removing foreign substances in air flowing into the intake port, and an outlet formed below the blower fan and the filter, wherein air from which the foreign substances have been removed is discharged downward through the outlet, thereby preventing the discharged airflow from directly reaching a user and causing discomfort, and effectively removing allergen substances.

[0015] An air purifier according to one embodiment of the present disclosure further includes a bottom plate disposed below the blower fan and the filter and in contact with the ground, wherein the bottom plate includes a boss protruding upward.

[0016] The upper surface of the bottom plate may be formed with a curved portion, a flat portion extending laterally from the curved portion, and a boss protruding upward from an end of the flat portion.

[0017] The above boss may include a sloped surface whose height increases as it goes outward along the radial direction.

[0018] The maximum height of the above boss may be less than 10% of the radius of curvature of the above curved portion.

[0019] The above boss can be formed in a ring shape along the edge of the bottom plate.

[0020] The above bottom plate further includes a central pillar that supports the blower fan from the lower side, and the curved portion can be formed to surround the central pillar.

[0021] The angle between the central pillar and the curved portion may be smaller than the angle of the discharge airflow through the discharge port.

[0022] The above discharge port may be provided with a lower discharge grill that includes a plurality of grills having a concentric circle structure and guides air discharged in the downward direction radially outward.

[0023] The above plurality of grills may have a concentric circle structure.

[0024] The length of the plurality of grills may be longer than the spacing between the plurality of grills.

[0025] The above plurality of grills can be bent at a predetermined angle in the outward direction.

[0026] The above predetermined angle may be 20 to 40 degrees.

[0027] The plurality of grills may include a curved portion bent radially outward and a protrusion protruding radially outward from an end of the curved portion.

[0028] The thickness of the above protrusion may be smaller than the thickness of the above curved portion.

[0029] The length of the protrusion protruding radially outwardly may be longer than the thickness of the curved portion.

[0030] On the upper surface of the bottom plate, a flow guide may be arranged to laterally guide air discharged downward through the discharge port.

[0031] The above euro guide may include a curved portion, a flat portion extending laterally from the curved portion, and a boss protruding upward from an end of the flat portion.

[0032] The above boss can be formed in a ring shape along the edge of the above euro guide.

[0033]

[0034] According to at least one of the embodiments of the present disclosure, by discharging air through a discharge port formed on the lower side of the blower fan and the filter, it is possible to prevent the discharged airflow from directly reaching the user and causing discomfort.

[0035] According to at least one of the embodiments of the present disclosure, allergen substances can be effectively removed by discharging air through a discharge port formed at the bottom of the product.

[0036] According to at least one of the embodiments of the present disclosure, the discharge port is provided with a lower discharge grill that guides the air discharged in a downward direction radially outward, thereby enabling more effective removal of large and heavy particles.

[0037] According to at least one of the embodiments of the present disclosure, the plurality of grills have a concentric circle structure, and the length of each grill is formed longer than the spacing between the grills, thereby effectively changing the direction of the discharge airflow.

[0038] According to at least one of the embodiments of the present disclosure, the plurality of grilles can be bent outwardly at a predetermined angle to guide airflow radially outward.

[0039] According to at least one of the embodiments of the present disclosure, a boss protruding upward is formed on the upper surface of a bottom plate disposed below the blower fan and the filter and in contact with the ground, thereby forming an airflow effective for removing allergen particles.

[0040] According to at least one of the embodiments of the present disclosure, the bottom plate can reduce flow resistance by including a boss protruding upward from an end.

[0041] According to at least one of the embodiments of the present disclosure, a flow guide is formed on the upper surface of the bottom plate to laterally guide air discharged downward through the discharge port, thereby effectively changing the direction of the discharge airflow.

[0042] According to at least one of the embodiments of the present disclosure, the euro guide can reduce flow resistance by including a curved portion.

[0043] The effects of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0044] Other effects will be apparent to those skilled in the art from the description of the claims.

[0045] FIG. 1 is a drawing illustrating the appearance of an air purifier according to one embodiment of the present disclosure.

[0046] FIG. 2 is a cross-sectional view of an air purifier according to an embodiment of the present disclosure.

[0047] FIGS. 3 and 4 are exploded views of an air purifier according to one embodiment of the present disclosure.

[0048] FIGS. 5 to 7 are drawings for reference in the description of the bottom discharge of clean air according to one embodiment of the present disclosure.

[0049] FIGS. 8 and 9 are drawings for reference in the description of a lower discharge grill according to one embodiment of the present disclosure.

[0050] FIGS. 10A to 10C are drawings for reference in the description of a grill shape according to an embodiment of the present disclosure.

[0051] Figures 11 and 12 are drawings for reference in the description of allergen particles.

[0052] Figure 13 is a drawing referenced in the description of a comparative experiment of clean air bottom discharge and top discharge.

[0053] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings. However, the present disclosure is not limited to these embodiments and can be modified in various forms.

[0054] In the drawings, parts that are not related to the description are omitted in order to clearly and concisely explain the present disclosure, and the same drawing reference numerals are used for the same or extremely similar parts throughout the specification.

[0055] Meanwhile, the suffixes "module" and "part" used in the following description are given solely for the convenience of writing this specification, and do not impart any particularly significant meaning or role to them. Therefore, the terms "module" and "part" may be used interchangeably.

[0056] Additionally, while terms such as "first" and "second" may be used in this specification to describe various elements, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0057] FIG. 1 is a drawing illustrating the exterior appearance of an air purifier according to an embodiment of the present disclosure, and FIG. 2 is a cross-sectional view of an air purifier according to an embodiment of the present disclosure. FIG. 3 and FIG. 4 are exploded views of an air purifier according to an embodiment of the present disclosure.

[0058] Referring to FIGS. 1 to 4, the air purifier (1) includes a case (10) forming an exterior. The case (10) has suction holes (11a, 12a) formed on the circumferential surface so that air can be sucked in from various directions. Air can be sucked in from 360 degrees based on a vertical center line passing through the inner center of the case (10). A plurality of suction holes (11a, 12a) are formed spaced apart from each other in the circumferential direction. The plurality of suction holes (11a, 12a) are evenly formed in the circumferential direction along the circumferential surface of the case (10) so that air can be sucked in from any direction based on the case (10).

[0059] Meanwhile, in this specification, the up-down direction or vertical direction is defined as the axial direction. The axial direction may correspond to the direction of the central axis of the blower fan (140) described later, i.e., the direction of the motor axis of the fan. In addition, the radial direction or horizontal direction may be understood as a direction perpendicular to the axial direction. In addition, the circumferential direction may be understood as the direction of an imaginary circle formed when rotating with the axial direction as the center and the radial distance as the rotation radius.

[0060] The air purifier (1) includes a blower fan (140) placed inside the case (10) and a filter (120) that removes foreign substances in the air flowing into the intake port (11a, 12a).

[0061] Air flowing into the intake port (11a, 12a) can pass through the filter (120). The filter (120) is provided in a cylindrical shape and may have a filter surface for filtering air.

[0062] The case (10) may have a cylindrical shape. The case (10) may include a first case (11) having a semi-cylindrical shape and covering a portion of the outer surface of the air purifier (1), and a second case (12) having a semi-cylindrical shape and covering the remaining portion of the outer surface of the air purifier (1).

[0063] Alternatively, the case (10) may have a conical shape (a truncated cone shape), and the first case (11) and the second case (12) may each have a semi-conical shape.

[0064] The first case (11) and the second case (12) can be combined to form the exterior of the air purifier (1). The first case (11) covers the front of the air purifier (1) and may be referred to as a "front case" or "front cover." The second case (12) covers the rear of the air purifier (1) and may be referred to as a "rear case" or "rear cover."

[0065] The suction ports (11a, 12a) include a first suction port (11a) formed in the first case (11) and a second suction port (12a) formed in the second case (12). The suction ports (11a, 12a) connect the inside and the outside of the case (10). A plurality of suction ports (11a, 12a) are formed. The case (10) can form a plurality of suction ports (11a, 12a) on its peripheral surface.

[0066] A plurality of suction ports (11a, 12a) are formed evenly in the circumferential direction along the outer surface of the case (10) so that air can be sucked in from any direction based on the case (10).

[0067] The plurality of suction ports (11a, 12a) are formed in a stripe shape extending vertically. Alternatively, the plurality of suction ports (11a, 12a) may be formed by perforating in a circular or oval shape.

[0068] In this way, the case (10) is configured in a cylindrical shape, and a plurality of suction ports (11a, 12a) are formed along the outer surface of the case (10), so that the amount of air sucked in can increase.

[0069] At the bottom of the air purifier (1), a discharge port (110a) is formed that opens downward. A lower discharge grill (110) that changes the wind direction of air flowing downward is arranged in the discharge port (110a).

[0070] A circular discharge port (110a) is formed at the bottom of the air purifier (1). Air from which foreign substances have been removed by the filter (120) is discharged downward through the discharge port (110a).

[0071] The lower discharge grill (110) may include a plurality of grills bent at a predetermined angle in the outward direction. The lower discharge grill (110) may be arranged at the discharge port (110a) to transmit the downward discharge airflow laterally.

[0072] The air purifier (1) includes a filter mounting portion (160) on which a filter (120) is mounted. The filter (120) can be detachably mounted on the filter mounting portion (160). The filter (120) has a hollow cylindrical shape, and air can be introduced through the outer circumference of the filter (120). Impurities such as fine dust in the air can be filtered out during the process of passing through the filter (120).

[0073] Since the filter (120) has a cylindrical shape, air can be introduced from any direction based on the filter (120). Therefore, the air filtering area can be increased.

[0074] The filter mounting portion (160) may be provided in a cylindrical shape corresponding to the shape of the filter (120). During the mounting process, the filter (120) may be slidably introduced toward the filter mounting portion (160). Conversely, during the dismounting process, the filter (120) may be slidably withdrawn from the filter mounting portion (160).

[0075] The air purifier (1) includes a discharge port (110a) formed at the bottom. The discharge port (110a) is formed below the blower fan (140) and the filter (120). Air from which foreign substances have been removed by the filter (120) is discharged downward through the discharge port (110a).

[0076] Additionally, a bottom discharge grill (110) is arranged at the bottom of the air purifier (1) to include multiple grills and guide the bottom airflow.

[0077] The lower discharge grille (110) may include a plurality of grilles having a concentric circle structure. The plurality of grilles may be a plurality of circles having the same center and different radii. The plurality of grilles may each include a section that is bent outward in the radial direction. The lower discharge grille (110) may include a plurality of grilles that are bent outward at a predetermined angle. The lower discharge grille (110) may be arranged at the discharge port (110a) to transmit downward discharge airflow laterally.

[0078] A bottom plate (170) is placed on the lower side of the air purifier (1). The bottom plate (170) is placed so as to contact the ground and supports the air purifier (1).

[0079] On the upper surface of the bottom plate (170), a flow guide (170a) is arranged to laterally guide air discharged downward through the discharge port (110a). The bottom plate (170) may further include a base (170b) that supports the flow guide (170a). The flow guide (170a) may be formed on the upper surface of the base (170b). In addition, the flow guide (170a) and the base (170b) may be combined to form the bottom plate (170).

[0080] Meanwhile, the bottom plate (170) may further include a central pillar (175) that supports the blower fan (140) from the lower side.

[0081] Air from which foreign substances have been removed in the filter (120) is discharged downward through the discharge port (110a).

[0082] Meanwhile, the particle size of general allergen substances is on the order of 3 to 100 ㎛, and since it is larger than fine dust, it has the property of settling to the bottom. Therefore, the air purifier (1) can implement an airflow to float allergen particles and capture them with a filter (120) through the downward airflow discharged downward by the air purifier (1). Therefore, the allergen substances that cause allergies can be effectively removed through the downward airflow discharged downward by the air purifier (1).

[0083] Meanwhile, the air purifier (1) may be equipped with a UVC LED (not shown) that outputs ultraviolet rays of a wavelength band that has a sterilizing effect on bacteria, mold, and microorganisms, and an ionizer (not shown) that eliminates bacteria and mold by passing electricity inside the case (10).

[0084] Meanwhile, the air purifier (1) includes a fan housing (145) that accommodates a blower fan (140), and a support member (150) that extends vertically from the fan housing (145). The support member (150) can extend in the longitudinal direction of the air purifier (1) product.

[0085] A plurality of support members (150) may be provided. For example, two support members (150) may be positioned facing each other on both sides of the filter (120). The number of support members (150) may vary depending on the model size and specifications. In addition, some of the support members (150) may be configured to have at least one different shape, size, or material from the rest.

[0086] Meanwhile, a bottom cover (180) is placed at the bottom of the combined case (10). A bottom discharge grill (110) is placed on the inside of the bottom cover (180).

[0087] The air purifier (1) includes a fan housing (145) positioned on the lower side of a filter (120), a blower fan (140) positioned rotatably inside the fan housing (145), and a fan motor (130) that rotates the blower fan (140).

[0088] The fan motor (130) may be supported by a motor fastening member (125). The rotational axis of the fan motor (130) may extend upward from the fan motor (130) and may be connected to a blower fan (140) by penetrating the bottom of the motor fastening member (125).

[0089] Magnets (not shown) may be placed on both sides of the fan housing (145). The magnets may be coupled with the metal piece (15) of the case (11). Additionally, the magnets may be coupled with the metal piece (15) of the second case (12).

[0090] According to an embodiment, each magnet may include a plurality of magnets, some of the plurality of magnets may be coupled with the metal piece (15) of the case (11), and the remaining some may be coupled with the metal piece (15) of the second case (12).

[0091] Additionally, the magnet and the metal piece (15) may be implemented by being interchangeable. For example, the metal piece may be placed on both sides of the fan housing (145), and the magnet may be placed on the case (11) and the second case (12).

[0092] A plurality of support members (150) extend upward from the fan housing (145). For example, the support members (150) may be long beams in the longitudinal direction.

[0093] A control module (200) is placed on the upper side of the filter (120).

[0094] The control module (200) is formed by combining the upper cover (230) and the case (210) to form an exterior, and houses a main PCB on which circuits such as a controller that controls the overall operation of the air purifier (1) are mounted.

[0095] The case (210) has an open center, and a filter press plate (220) is placed in the open center. The filter press plate (220) can be connected to a plurality of springs (not shown).

[0096] FIGS. 5 to 7 are drawings for reference in the description of the bottom discharge of clean air according to one embodiment of the present disclosure.

[0097] Figure 5 illustrates the airflow path of the lower exhaust airflow, and Figure 6 visualizes the lower exhaust airflow using a laser. Figure 7 is an enlarged view of the lower exhaust airflow path guide structure.

[0098] Referring to FIGS. 5 to 7, an outlet (110a) is formed at the bottom of the air purifier (1), and a bottom outlet grill (110) is arranged at the outlet (110a) to guide the bottom outlet airflow.

[0099] The lower discharge grill (110) may include a plurality of grills. The plurality of grills may be bent radially outward at a predetermined angle. The lower discharge grill (110) may be positioned at the discharge port (110a) to transmit downward discharge airflow laterally.

[0100] Meanwhile, when the motor (130) rotates the blower fan (140), a bottom discharge airflow is formed in which the air purified in the filter (120) is discharged to the discharge port (110a).

[0101] On the upper surface of the bottom plate (170), a flow guide (170a) is arranged to guide air discharged downward through the discharge port (110a) laterally.

[0102] The euro guide (170a) includes a curved portion (173), a flat portion (171) extending laterally from the curved portion (173), and a boss (172) protruding upward from an end of the flat portion (171).

[0103] The boss (172) can form an airflow that is effective in floating allergen particles. The boss (172) can reduce the flow resistance at the end. The boss (172) can prevent the flow separation phenomenon at the end. The boss (172) can be formed in a ring shape along the edge of the flow guide (170a). The boss (172) protrudes from the flat portion (171) by a predetermined height (d1) to prevent the occurrence of turbulence at the end and to raise the airflow. Accordingly, the flow separation phenomenon can be prevented while effectively floating allergen particles on the floor.

[0104] Meanwhile, if the height (d1) of the boss (172) is too high, the airflow may be excessively upwardly diverted, which may be inappropriate for floating allergen particles on the floor. For example, the height (d1) of the boss (172) is preferably formed to be less than several millimeters to prevent the flow separation phenomenon.

[0105] The boss (172) may include a slope that increases in height as it goes outward along the radial direction. Accordingly, an airflow that gradually rises along the slope can be generated.

[0106] The curved portion (173) may be formed to surround the central pillar (175) of the bottom plate (170). The curved portion (173) formed in a curve can reduce flow resistance. The curved portion (173) that reflects the curvature of the flow guide (170a) may be formed to be round with a predetermined radius of curvature (R1). The radius of curvature (R1) may be set so as to naturally guide the lower discharge airflow to the side. In addition, the maximum height (d1) of the boss (172) may be formed to be less than 10% of the radius of curvature (R1) of the curved portion (173).

[0107] The radius of curvature (R1) may be set corresponding to the grill bending angle of the lower discharge grill (110). For example, a predetermined angle (ag1) may be determined from the vertical direction corresponding to the grill bending angle of the lower discharge grill (110), and a radius of curvature (R1) capable of forming the determined angle (ag1) may be applied. More specifically, the angle (ag1) may be set smaller than the grill bending angle of the lower discharge grill (110).

[0108] The predetermined angle (ag1) may be the angle between the central pillar (175) and the curved portion (173). In this case, the predetermined angle (ag1) may be smaller than the discharge airflow angle through the discharge port (110). The discharge airflow angle may correspond to the grill arrangement angle and the grill bending angle of the lower discharge grill (110). The grill bending angle may mean the angle between a horizontal imaginary line and an imaginary line extending from the end of the bent curved section.

[0109] FIGS. 8 and 9 are drawings for reference in the description of a lower discharge grill according to one embodiment of the present disclosure.

[0110] Referring to FIGS. 8 and 9, the lower discharge grill (110) has a plurality of grills (113) having a concentric structure arranged between the outer wall (111) and the inner wall (112), and a support member (114) supports the grills (113).

[0111] A base (115) may be located on the inner side of the inner wall (112). The upper side of the base (115) may be located on the lower side of the blower fan (140), and the lower side may be located on the central pillar (175).

[0112] The length of the grill (113) may be longer than the spacing (d2) between the grills (113). Accordingly, a sufficient length can be secured to guide the airflow laterally.

[0113] FIGS. 10A to 10C are drawings for reference in the description of a grill shape according to an embodiment of the present disclosure.

[0114] Referring to FIG. 10a, the straight grill (1010) may be arranged at an angle corresponding to the discharge angle (ag2). In this case, the airflow is formed along the discharge angle (ag2) corresponding to the arrangement angle of the straight grill (1010).

[0115] Referring to FIG. 10b, the grill (1020) can be bent outward along the radial direction to discharge airflow at a discharge angle (ag2).

[0116] Meanwhile, the grille bending angle of the inner grille (110, 210) may be formed at 20 to 40 degrees to raise the airflow by more than 20 degrees to float particles on the floor. If the grille bending angle is less than 20 degrees, the airflow may not be sufficiently diverted to the side. If the grille bending angle is greater than 40 degrees, loss may increase. The air purifier (1) may not be able to float allergen particles near the bottom of the product.

[0117] The thickness (d3) of the grill (1020) may be formed differently in some sections than in other sections.

[0118] Referring to FIG. 10c, the grill (1030) may include a curved portion (1031) bent radially outward and a protrusion (1032) protruding radially outward from an end of the curved portion (1031). That is, the grill (1030) of FIG. 10c is the grill (1020) of FIG. 10b with the protrusion (1032) added.

[0119] To enable the airflow to be guided laterally without being blocked, the thickness (d5) of the protrusion (1032) may be smaller than the thickness (d3) of the curved portion (1031).

[0120] Additionally, the length (d4) protruding radially outward of the protrusion (1032) may be longer than the thickness (d3) of the curved portion (1031).

[0121] Figures 11 and 12 are drawings for reference in the description of allergen particles.

[0122] Referring to Figures 11 and 12, particles of common allergen substances are larger and heavier than indoor floating dust particles of 1 ㎛ in size, ranging from 3 to 100 ㎛, and tend to settle to the floor. For example, mold particles are 10 ㎛ in size, house dust allergen particles are 15 ㎛ in size, and pollen particles are 50 ㎛ in size.

[0123] Viruses, cigarette smoke, etc. are very small and do not settle but rather remain suspended, and indoor floating dust remains suspended for a considerable period of time, taking 9 to 10 hours to settle from the ceiling to the floor of a house.

[0124] However, under the same conditions, mold particles, house dust allergen particles, and pollen particles float and settle for only a short time, from a few minutes to a few seconds. Therefore, air purifiers struggle to capture allergen particles, and using a vacuum cleaner to remove the accumulated particles is the only option.

[0125] According to the present disclosure, an airflow for capturing allergen particles by floating them in the downward airflow discharged by the air purifier (1) can be implemented.

[0126] Meanwhile, according to one embodiment of the present disclosure, the bottom discharge airflow velocity can be controlled in response to the gravitational settling velocity (Terminal Velocity) of the allergen particles. The bottom discharge airflow velocity can be set to be greater than the gravitational settling velocity.

[0127] The rotation speed of the blower fan (140) can be controlled based on the gravitational settling velocity of the allergen particles. The rotation speed of the blower fan (140) can correspond to a lower discharge airflow velocity set greater than the gravitational settling velocity. The controller of the control module (200) can control the speed of the blower fan (140).

[0128] Gravitational settling velocity can be calculated by using the balance between gravity, buoyancy, and drag of a particle. For example, the gravitational settling velocity of an allergen particle can be calculated using the well-known Stokes equation for calculating the settling velocity.

[0129] The bottom exhaust airflow velocity can be set to be greater than the gravitational settling velocity of larger house dust allergen particles so as to suspend both 10 μm mold particles and 15 μm house dust allergen particles. For example, the bottom exhaust airflow velocity can be set to be greater than 0.0038 m / s.

[0130] The curved portion (173) can naturally guide the lower discharge airflow laterally to reduce flow resistance. According to the present disclosure, a curvature is applied to the bottom plate (170) to transfer the lower discharge airflow laterally, and a boss (171) is applied to the end to form a turbulent flow for floating allergen particles. That is, the flow guide (170a) reflects the slope and curvature, and a boss is reflected to improve flow separation, thereby minimizing the resistance of the lower discharge airflow.

[0131] Figure 13 is a drawing referenced in the description of a comparative experiment of clean air bottom discharge and top discharge.

[0132] Figure 13 shows the results of evaluating the removal performance by particle size by operating an air purifier that sucks air through the side and discharges air downwards and an air purifier that sucks air through the side and discharges air upwards over the same area for the same time.

[0133] Referring to Fig. 13, the removal performance of small particles of 0.3 μm in both modes was similar.

[0134] However, for large particles of 2.8㎛, the bottom-discharge air purifier showed a better removal performance of 12.2% than the top-discharge air purifier's 10.6%. In addition, while the top-discharge air purifier showed a 2% increase in the removal performance of large particles of 2.8㎛ compared to the removal performance of small particles of 0.3㎛, the bottom-discharge air purifier showed a 12% increase in the removal performance of large particles of 2.8㎛ compared to the removal performance of small particles of 0.3㎛.

[0135] Typically, air purifiers feature a bottom and / or central intake that draws in outside air and expels it upward. While this upward-exhausting design effectively removes fine dust, it is less effective than bottom-exhausting airflow for removing allergens and large particles (<1㎛ in diameter), whose primary action mechanism is sedimentation. Furthermore, the exhaust airflow can be uncomfortable for users, potentially causing discomfort.

[0136] The present disclosure reduces user discomfort by directing the discharge airflow downward so that it does not directly impact the user. Furthermore, the present disclosure implements an airflow specialized for allergen removal that suspends large and heavy particles, such as allergen particles, in the downward discharge airflow.

[0137] Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary skill in the art to which the present disclosure pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. A case with a suction port formed on the periphery; A blower fan placed inside the case; A filter that removes foreign substances from the air flowing into the above intake; A discharge port formed on the lower side of the above blower fan and the above filter; and It includes a bottom plate that is placed on the lower side of the above-mentioned blower fan and the above-mentioned filter and is in contact with the ground; The air from which the above foreign substances have been removed is discharged downward through the discharge port, An air purifier wherein the bottom plate includes a boss protruding upward.

2. In paragraph 1, The above boss, An air purifier formed in a ring shape along the edge of the above bottom plate.

3. In paragraph 1, The above boss, An air purifier comprising a sloped surface whose height increases as it goes outward along the radial direction.

4. In paragraph 1, On the upper surface of the above bottom plate, a curved portion and a flat portion extending laterally from the curved portion are formed, The above boss is an air purifier that protrudes upward from the end of the above flat portion.

5. In paragraph 4, The highest height of the above boss is, An air purifier having a radius of curvature of less than 10% of the radius of curvature of the above-mentioned curved portion.

6. In paragraph 4, The above bottom plate, It further includes a central pillar that supports the above blower fan from the bottom, An air purifier in which the above-mentioned curved portion is formed to surround the central pillar.

7. In paragraph 6, An air purifier in which the angle between the central pillar and the curved portion is smaller than the angle of airflow discharged through the discharge port.

8. In paragraph 1, In the above discharge port, An air purifier comprising a plurality of grills, and a lower discharge grill arranged to guide air discharged in the downward direction radially outward.

9. In paragraph 8, An air purifier in which the above plurality of grills have a concentric circle structure.

10. A case with suction holes formed on the periphery; A blower fan placed inside the case; A filter that removes foreign substances in the air flowing into the above intake; and It includes a blower fan and a discharge port formed on the lower side of the filter; The air from which the above foreign substances have been removed is discharged downward through the discharge port, In the above discharge port, An air purifier comprising a plurality of grills having a concentric circle structure, and a lower discharge grill arranged to guide air discharged in the downward direction radially outward.

11. In paragraph 10, An air purifier in which the length of the plurality of grills is longer than the interval between the plurality of grills.

12. In paragraph 10, The above plurality of grills are an air purifier bent at a predetermined angle in an outward direction.

13. In paragraph 12, An air purifier having a predetermined angle of 20 to 40 degrees.

14. In paragraph 12, The above plurality of grills are, The curved portion bent outward in the radial direction above An air purifier including a protrusion protruding radially outward from an end of the above curved portion.

15. In paragraph 14, An air purifier in which the thickness of the above protrusion is smaller than the thickness of the above curved portion.

16. In paragraph 14, An air purifier in which the length of the protrusion protruding outward in the radial direction of the above protrusion is longer than the thickness of the curved portion.

17. In paragraph 10, An air purifier further comprising a bottom plate disposed below the above-mentioned blower fan and the above-mentioned filter and in contact with the ground.

18. In paragraph 17, An air purifier in which a flow guide is arranged on the upper surface of the bottom plate to guide air discharged downward through the discharge port laterally.

19. In paragraph 18, The above Euro guide is, An air purifier comprising a curved portion, a flat portion extending laterally from the curved portion, and a boss protruding upward from an end of the flat portion.

20. In paragraph 19, The above boss, An air purifier formed in a ring shape along the edge of the above Euro guide.

Images