Portable air caring apparatus

Abstract

This invention provides a portable air purifier. The portable air purifier of this invention may include: a housing having an internal accommodating space, having an inlet for drawing in air and an outlet for expelling air; a filter disposed on the inner side of the housing facing the inlet; a fan module disposed on the inner side of the housing facing the outlet; a filter housing located between the filter and the fan module, the filter being detachably disposed on the filter housing to guide air movement from the filter to the fan module; and a sterilization unit mounted on the filter housing to irradiate sterilization light toward the filter.

Description

Technical Field

[0001] This invention relates to portable air purifiers, and more specifically to a portable air purifier capable of sterilization and filtration. Prior Technology

[0002] Air purifiers are widely used devices in modern life. They are devices that purify the air by filtering out physical particles such as dust, fine dust, and ultrafine dust, odor particles, chemical substances such as harmful gases, and microorganisms such as bacteria and viruses.

[0003] With the influence of urbanization, industrialization, and globalization, air purifiers have become an indispensable device in ordinary households. Furthermore, due to factors such as increased dust levels, a rise in allergy sufferers, and improved living standards, the demand for them is showing a rapid upward trend.

[0004] Air purifiers can be large enough to be used in environments larger than 100 square meters, such as typical homes. Such devices can incorporate filters that target physical particles like dust, chemical substances like gases, and microorganisms like bacteria and viruses. In other words, large air purifiers capable of housing multiple types of filters can be used in spacious environments.

[0005] However, in confined spaces such as single rooms, vehicle interiors, or very spacious areas like public libraries, or outdoors, using large air purifiers is inefficient in terms of space utilization, portability, and energy consumption. Furthermore, for users who move frequently, smaller, portable air purifiers are more suitable than larger ones. Against this backdrop, portable air purifiers that are easy for individuals to carry are being developed.

[0006] Portable air purifiers are designed to be small and lightweight for easy carrying. These portable air purifiers offer the advantage of being convenient for users to carry and use in any location where needed. In other words, portable air purifiers are suitable for users with lifestyles that involve frequent travel or moving between multiple locations, rather than for prolonged use in a single location such as the home.

[0007] The prior art (Korean Invention Publication No. 10-2019-0029478 A, Invention Title: Portable Air Purifier) ​​relates to an air purifier, in which a rear panel for drawing in air and a front panel for expelling air are arranged horizontally. Therefore, external air flowing into the inner side of the housing through the rear panel passes sequentially through a filter and a fan element, and is then discharged to the outside of the portable air purifier through the exhaust port.

[0008] However, since the prior art did not include an additional sterilization device for the sterilization filter, the possibility of filter contamination increased.

[0009] Furthermore, in the case of an additional sterilization device for the sterilization filter being installed inside the prior art, an additional mounting bracket for fixing the sterilization device needs to be added inside the housing. Because this additional mounting bracket is added inside the housing, the size of the filter and fan components becomes relatively smaller, resulting in a reduction in air purification capacity.

[0010] Furthermore, in the prior art, when the sterilization device is fixed to the fan module, the sterilization light emanating from the sterilization device is interfered with by the filter housing of the fixed filter, resulting in inadequate sterilization of the filter. Additionally, when the sterilization device is installed on the fan module, the frictional resistance between the air drawn into the fan module and the sterilization device increases, leading to a reduction in airflow capacity.

[0011] Furthermore, the shell shape of the prior art is a cuboid shape extending in the vertical direction, with corners on the outer side. Therefore, inconvenience may occur when the user holds the outer side of the shell. When a portable air purifier is placed in a structure with a downward-facing recessed groove, such as a cup support, a gap will be created between the cylindrical cup support and the shell, causing the shell to wobble, resulting in vibration and noise problems. Summary of the Invention

[0012] The purpose of this invention is to provide a portable air purifier equipped with an additional sterilization device for a sterilization filter, thereby blocking air pollution.

[0013] Furthermore, the purpose of this invention is to provide a portable air purifier that, by providing a sterilization device inside the portable air purifier, minimizes the increase in resistance to the airflow path through the portable air purifier, thereby enabling it to achieve higher air purification performance.

[0014] Furthermore, the purpose of this invention is to provide a portable air purifier that, when mounted on a cup support, reduces the vibration and noise of the portable air purifier.

[0015] Furthermore, the purpose of this invention is to provide a portable air purifier that allows the user to comfortably hold the outer side of the casing and move it.

[0016] The objectives of this invention are not limited to those mentioned above. Other objectives and advantages of the invention not mentioned can be understood through the following description, and can be further clearly understood through embodiments of the invention. Furthermore, those skilled in the art will readily understand that the objectives and advantages of this invention can be achieved through the structural elements and combinations thereof described in the appended claims.

[0017] In order to solve the technical problems mentioned above, the portable air purifier of the present invention is characterized by having a sterilization section between the filter and the fan module to sterilize the filter.

[0018] Specifically, a sterilization section is provided between the filter housing supporting the filter and the fan module, or a sterilization section is provided inside the filter housing, and sterilization of the filter can be achieved by using sterilization light irradiated from the sterilization section. Furthermore, since the sterilization section is located between the fan module and the filter and irradiates sterilization light towards the filter that blocks the inlet, it can prevent harmful sterilization light from being exposed to the outside of the housing.

[0019] Furthermore, the portable air purifier of the present invention is characterized in that the sterilization unit is arranged in a shape that extends in the vertical direction at the center of the fan module, thereby minimizing the increase in airflow resistance.

[0020] Specifically, when multiple fan components are arranged in a vertical direction, the upper and lower ends of the sterilization section extending in the vertical direction do not protrude outward from the hub of the fan component. Therefore, the situation where the sterilization section obstructs the airflow path drawn into the fan component can be minimized.

[0021] Furthermore, the portable air purifier of the present invention is characterized in that, in the state of having an air flow path that runs through the housing in a horizontal direction, a sterilization section is provided between the filter and the fan module.

[0022] Specifically, the air flowing into the inlet of the housing moves horizontally, passes through the filter, sterilization section and fan module in sequence, and is discharged through the outlet of the housing. Therefore, due to the short air movement path, the air flow resistance can be reduced.

[0023] Furthermore, the portable air purifier of the present invention is characterized by having a first horizontal center line, which passes through the center of the housing in the horizontal direction and is located between the inlet and the outlet, as a reference, with the distance between the center line and the filter and the distance between the center line and the fan module being different from each other.

[0024] Specifically, in order for the sterilization unit to irradiate the filter with sterilization light, a predetermined interval needs to be maintained between the sterilization unit and the filter. Since the air delivery capacity of the fan module is an important factor for the air purification function, the fan module is positioned closer to the first horizontal center line than the filter. Furthermore, the volume of the fan module is larger than the volume of the filter.

[0025] Furthermore, the technical feature of the portable air purifier of the present invention is that the cross-section of the housing provided in the recessed groove of a vehicle cup support is circular or elliptical.

[0026] Specifically, the shell has a circular or elliptical cross-section, which allows it to be stably placed in the groove of the cup support with a circular cross-section, and reduces the distance between the shell and the cup support, thereby reducing the possibility of vibration and noise.

[0027] Furthermore, the technical feature of the portable air purifier of the present invention is that the sterilization part is fixed between the fan module and the filter housing.

[0028] Specifically, the front of the sterilization unit is supported by a fixing protrusion on the filter housing, and the rear of the sterilization unit is supported by the fan module. Therefore, there is no need to add an additional fixing bracket for fixing the sterilization unit, which minimizes the increase in airflow resistance.

[0029] Furthermore, the portable air purifier of the present invention is characterized by a protruding rib provided on the radially outer side of the flared opening. The protruding rib is spaced apart from the protective cover at a predetermined interval and forms an inclined surface parallel to the inclined surface of the protective cover. Therefore, it can provide the effect of suppressing flow loss caused by return air and increasing the rigidity of the fan base to suppress deformation of the fan base caused by external forces.

[0030] The portable air purifier of the present invention may include a housing, a filter, a fan module, a filter housing, and a sterilization unit.

[0031] The housing may have an internal accommodating space and an air intake portion and an air exhaust portion. Furthermore, the housing may include a first outer shell and a second outer shell.

[0032] A filter, a sterilization unit, and a fan module are provided inside the first housing. Furthermore, an inlet is located on one side of the first housing, and an air outlet is located on the opposite side facing the inlet.

[0033] Furthermore, the first housing may include a first housing body and a maintenance door. The first housing body may have an inlet and an outlet, and a maintenance space on the side.

[0034] The maintenance door is detachably mounted on the first housing body and allows for the opening and closing of the maintenance space. The maintenance door may include a door body, a spacer-retaining protrusion, and a first mounting groove. The door body is detachably mounted on the first housing body. The spacer-retaining protrusion may protrude inwards from the door body. Furthermore, the spacer-retaining protrusion may extend toward at least one of the filter and the filter housing.

[0035] Furthermore, the first mounting groove can be formed on the inner side of the door body along the vertical direction.

[0036] Furthermore, the first housing body may also include a second mounting groove, which is formed along the vertical direction on the inner side of the first housing body facing the first mounting groove. Additionally, one side and the other side of the fan module in the width direction are inserted into the first and second mounting grooves, thereby constraining the movement of the fan module.

[0037] Furthermore, in the inlet section, a plurality of inlet grilles extending vertically can be provided on one side of the housing to form inlet holes. The inlet grilles can also extend along the length direction, thereby guiding the airflow path along the length direction. Similarly, in the outlet section, a plurality of outlet grilles extending vertically can be provided on the other side of the housing to form outlet holes. The outlet grilles can also extend along the length direction, thereby guiding the airflow path along the length direction. The inlet holes and outlet holes can face each other in the horizontal direction. Furthermore, the width length of the inlet section is shorter than the width length of the filter.

[0038] Furthermore, the second housing is connected to the lower part of the first housing. A battery can also be housed inside the second housing.

[0039] An airflow path is formed on the inner side of the first housing, while no airflow path is formed on the inner side of the second housing. Furthermore, the cross-section of at least one of the first and second housings can be circular or elliptical. The first and second housings can be formed separately and then assembled, or they can be formed integrally.

[0040] Furthermore, the filter can be disposed inside the housing facing the inlet. The filter can also be positioned inside the housing and oriented to face the inlet. The filter's width sides can be in contact with the inside of the housing. The filter has a cuboid shape extending vertically. Furthermore, by mounting the filter inside the filter housing, its movement can be restricted.

[0041] Furthermore, the filter is detachably mounted on a filter housing, which can be located between the filter and the fan module. The filter housing can also guide air movement from the filter to the fan module.

[0042] Furthermore, the filter housing may include at least one of the following: housing body, flow path guide, fixing support, locking boss, first fixing protrusion, second fixing protrusion, and first connecting protrusion.

[0043] The outer casing is fixed inside the housing, and the filter is installed inside the outer casing. Furthermore, the outer casing may have openings on both sides along its length.

[0044] Furthermore, the flow path guide is located on one side of the housing body, which can form a channel for air to move from the filter toward the fan module.

[0045] Furthermore, the fixing support portion can be located in the middle of the flow path guide portion. Also, the fixing support portion can extend in the vertical direction and have protrusions supporting the sterilization portion.

[0046] Furthermore, the locking protrusion can protrude inwards from the outer casing, thereby restricting the movement of the filter. Also, the filter locked by the locking protrusion can be positioned at a predetermined distance from the sterilization unit.

[0047] Furthermore, the first fixing protrusion can protrude towards the upper side of the outer shell body and be fixed to the first protrusion provided on the inner side of the shell. And the second fixing protrusion can protrude towards the lower side of the outer shell body and be fixed to the second protrusion provided on the inner side of the shell.

[0048] The first connecting protrusion can protrude toward the fan module and insert into the fan module.

[0049] Furthermore, the flow path guide can be provided on both sides of the fixed support, extending in the vertical direction, and has a plurality of through holes.

[0050] Furthermore, the fixed support portion may include: a filter frame forming an inner hole extending in the vertical direction and connected to the flow path guide portion; and a plurality of fixed protrusions protruding from the filter frame toward the inner hole.

[0051] Furthermore, the sterilization unit can be installed in the filter housing and irradiate the filter with sterilization light. The sterilization unit can also be inserted into the inside of the filter frame and its movement is constrained by a fixing protrusion. The sterilization unit can be located at the center of the filter housing in the width direction and extends vertically. The sterilization unit may include: a printed circuit board extending vertically; and a sterilization light source located on both sides of the printed circuit board in the vertical direction, irradiating the filter with sterilization light. The sterilization unit can be located at the center of the fan module in the width direction. Two fan components can be arranged vertically along the sterilization unit. The upper end of the sterilization unit can be positioned lower than the upper end of the hub of the fan component located above the sterilization unit. The lower end of the sterilization unit can be positioned higher than the lower end of the hub of the fan component located below the sterilization unit. The irradiation angle of the sterilization light source is 140 degrees to 160 degrees.

[0052] Furthermore, the fan module can be disposed inside the housing facing the exhaust section. The fan module can include a fan housing, a fan component, and a fan base. The fan housing is fixed inside the housing. The fan component can be rotatably disposed inside the fan housing, allowing air to move towards the exhaust section. The fan base is attached to the fan housing and guides air passing through the filter into the fan component. The width of the fan module is longer than the width of the exhaust section.

[0053] Furthermore, the fan housing can be attached to the fan base in a manner that surrounds the fan component. The fan housing, fan component, and fan base can be constructed as modules. Two fan housings and fan components can be provided in the vertical direction of the fan base. The rotation axis of the fan component can intersect the sterilization section at a right angle.

[0054] Furthermore, the fan housing may include at least one of a support plate, a connecting bracket, a side support portion, and a protruding post. The support plate may be arranged in a plate shape at a position facing the fan component. The connecting bracket may extend outward from the support plate. The side support portion may be connected to the connecting bracket and form a circular or quadrilateral frame around the periphery of the support plate. The protruding post may protrude from the side support portion toward the fan base and engage with the fan base.

[0055] Furthermore, the fan housing may include: a wire guide, which is continuously disposed on the connecting bracket and supports the wire disposed along the side of the connecting bracket. Additionally, the fan housing may include: a wire fixing protrusion, which protrudes from the side support portion, is located laterally to the wire disposed outside the connecting bracket, and restrains the wire from detachment.

[0056] Furthermore, the fan component may include: a hub located at the center of the fan housing, receiving external power and rotating; a plurality of fan blades equally spaced along the outer circumferential surface of the hub; and a shroud connected to the ends of the fan blades and arranged in a ring shape, spaced apart from the fan base.

[0057] Furthermore, the outer diameter of the hub and the inner diameter of the shroud can gradually decrease from the discharge section towards the inlet section.

[0058] Furthermore, the fan base may include at least one of the following: a base plate, a flared opening, a connecting protrusion, and a protruding rib.

[0059] The base plate is a plate shape with a hollow section for air movement that extends vertically. The flared opening can be arranged in a ring shape on the inner side of the base plate facing the hollow section. The flared opening can also have a concave longitudinal section to surround the lower side of the inlet protrusion of the shroud. Furthermore, a connecting protrusion can protrude from the base plate and engage with a protrusion on the fan housing. A protruding rib can be provided to annularly surround the outer periphery of the flared opening. The protruding rib can also be arranged parallel to the outer side of the fan component.

[0060] Furthermore, the air flowing into the inlet can be guided horizontally, passing through the filter, filter housing, and fan module in sequence, and then discharged to the outside of the housing through the exhaust section.

[0061] Furthermore, the first horizontal centerline, which passes through the center of the casing laterally, is located between the inlet and the outlet.

[0062] Furthermore, when the distance between the first horizontal centerline and the filter is referred to as D1, and the distance between the first horizontal centerline and the fan module is referred to as D2, D1 and D2 have different values. Also, D1 can have a value greater than D2.

[0063] Furthermore, the center of the housing intersects the first horizontal center line at a right angle, and the second horizontal center line, which extends laterally, passes through the center of the width direction of the inlet, filter, sterilization section, fan module, and discharge section.

[0064] Furthermore, multiple fan components can be provided in the fan module in the vertical direction. A sterilization section can be positioned parallel to a vertical virtual line that intersects the rotation center axis of the fan components and extends in the vertical direction. One side of the sterilization section can be supported by a fixing protrusion of the filter housing. The other side of the sterilization section can be supported by the fan module.

[0065] In the portable air purifier of the present invention, a sterilization section is provided between the filter and the fan module to sterilize the filter, thereby blocking air pollution.

[0066] Furthermore, in this invention, the sterilization unit is disposed between the filter and the fan module to prevent the sterilization light irradiating the filter that shields the inlet from leaking to the outside of the housing, thus providing a safe operating environment.

[0067] Furthermore, in this invention, there is no need to equip an additional fixing bracket for fixing the sterilization part. The sterilization part can be fixed between the filter housing and the fan module, or fixed inside the filter housing. Therefore, the increase in airflow resistance is minimized, thereby improving air purification performance.

[0068] Furthermore, in this invention, an additional mounting bracket for fixing the sterilization unit can be added. Also, in this invention, the mounting bracket for fixing the sterilization unit is positioned to minimize the increase in airflow resistance, thereby improving air purification performance.

[0069] Furthermore, in this invention, with the sterilization section located at the center of the fan module in the width direction and extending vertically, the upper and lower ends of the sterilization section do not protrude outwards from the hub of the fan component. Since the upper and lower ends of the sterilization section do not face the suction space formed by the outer side of the hub, the increase in flow resistance of the air drawn into the fan component is minimized, thereby improving air purification performance.

[0070] Furthermore, in this invention, the air flowing into the inlet of the housing moves horizontally, passes through the filter, sterilization section and fan module in sequence, and is discharged through the outlet of the housing. Therefore, heat dissipation of the sterilization section can be easily achieved to improve its durability, and the air movement path can be shortened to improve air purification performance.

[0071] Furthermore, in this invention, the fan module is positioned closer to the first horizontal centerline than the filter, thus minimizing the reduction in air purification efficiency and achieving filter sterilization, thereby preventing air pollution and improving customer satisfaction.

[0072] Furthermore, in this invention, the second outer shell is placed on a structure such as a cup support member with a groove shape that is recessed to the lower side, and air is drawn in through the inlet provided on the first outer shell without interfering with the external structure, thus improving air purification performance.

[0073] Furthermore, in this invention, since the cross-section of the housing provided in the recessed groove of a vehicle cup support is circular or elliptical, the distance between the housing and the cup support is reduced compared to a housing with a polygonal cross-section, thereby reducing vibration and noise.

[0074] Along with the effects described above, the specific effects of the present invention will be described in conjunction with the following description of the specific content used to implement the present invention. Simple Explanation of the Diagram

[0075] Figure 1 is a perspective view showing a portable air purifier according to an embodiment of the present invention; Figure 2 is a front view of a portable air purifier according to an embodiment of the present invention; Figure 3 is a rear view of a portable air purifier according to an embodiment of the present invention; Figure 4 is a top view of a portable air purifier according to an embodiment of the present invention; Figure 5 is a perspective view showing the first outer casing of the portable air purifier separated from the device according to an embodiment of the present invention; Figures 6 and 7 are exploded perspective views of a portable air purifier according to an embodiment of the present invention; Figure 8 is a diagram showing the airflow path along the horizontal direction through a portable air purifier according to an embodiment of the present invention; Figure 9 is an exploded perspective view of a housing according to an embodiment of the present invention; Figure 10 is a plan sectional view of a portable air purifier according to an embodiment of the present invention; Figure 11 is a view showing the direction of air movement through a portable air purifier according to an embodiment of the present invention; Figure 12 is a front view showing the state in which the sterilization unit is disposed between the fan module and the filter according to an embodiment of the present invention; Figures 13 and 14 are perspective views showing the state in which the filter housing is located between the sterilization section and the filter according to an embodiment of the present invention; Figure 15 is a perspective view showing a filter housing according to an embodiment of the present invention; Figure 16 is a view showing the state in which the sterilization section is disposed in the center of the fan module according to an embodiment of the present invention; Figure 17 is a perspective view showing the fan housing and fan module separated according to an embodiment of the present invention; Figure 18 is a perspective view showing a fan housing according to an embodiment of the present invention; Figure 19 is a perspective view showing the inner side of a fan housing according to an embodiment of the present invention; Figure 20 is a perspective view showing a shroud for a fan component according to an embodiment of the present invention; Figure 21 is a perspective view showing the shaft connection portion of a fan component according to an embodiment of the present invention; Figure 22 is a front view of a fan component according to an embodiment of the present invention; Figure 23 is a view showing the hub of a fan component according to an embodiment of the present invention; Figure 24 is a cross-sectional view of a fan component according to an embodiment of the present invention; Figure 25 is a perspective view showing the fan base separated from the filter housing according to an embodiment of the present invention; Figure 26 is a perspective view showing a fan base according to an embodiment of the present invention; Figure 27 is a view showing the state in which the sterilization section according to an embodiment of the present invention is arranged separately from the filter; Figure 28 is a view showing the state in which sterilizing light is irradiated onto the filter of the sterilizing section according to an embodiment of the present invention; and Figure 29 is a view showing the state in which the locking protrusion is provided on the front surface of the sterilization section according to an embodiment of the present invention. Implementation

[0076] The foregoing objectives, features, and advantages are described in detail below with reference to the accompanying drawings. Therefore, those skilled in the art can readily implement the technical concept of this invention. In describing this invention, if it is determined that a detailed description of well-known techniques related to this invention would unnecessarily obscure the essence of the invention, such detailed description will be omitted. Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. The same element symbols in the drawings denote the same or similar structural elements and are used.

[0077] Although terms such as "first" and "second" are used to describe a variety of structural elements, these structural elements are not limited to these terms. These terms are used only to distinguish one structural element from others, and unless specifically stated otherwise, a first structural element may also be a second structural element.

[0078] The following description of arranging any structural element on the "upper (or lower)" or "above (or below)" of a structural element can mean that not only is any structural element in contact with the upper (or lower) surface of the structural element, but other structural elements may also be sandwiched between the structural element and any structural elements arranged on (or below) the structural element.

[0079] Furthermore, when it is described as any structural element being "connected," "joined," or "in contact" with other structural elements, it can mean that the structural elements are directly connected or in contact with each other, but it can also be understood as other structural elements being "interposed" between the structural elements, or that the structural elements are "connected," "joined," or "in contact" through other structural elements.

[0080] Throughout this specification, unless otherwise stated, each structural element may be singular or plural.

[0081] In this specification, unless the context clearly indicates otherwise, singular expressions include plural expressions. In this application, terms such as "constituting" or "comprising" should not be construed as necessarily including all of the multiple structural elements or steps described in the specification, but should be construed as possibly excluding some of the structural elements or steps, or possibly including additional structural elements or steps.

[0082] Throughout the specification, when referred to as "A and / or B", it means "A, B" or "A and B" unless otherwise stated. When referred to as "C to D", it means above C and below D unless otherwise stated. The appearance of portable air purifiers

[0083] Figure 1 is a perspective view showing a portable air purifier 1 according to an embodiment of the present invention; Figure 2 is a front view of a portable air purifier 1 according to an embodiment of the present invention; Figure 3 is a rear view of a portable air purifier 1 according to an embodiment of the present invention; and Figure 4 is a top view of a portable air purifier 1 according to an embodiment of the present invention.

[0084] As shown in Figures 1 to 4, the portable air purifier 1 according to an embodiment of the present invention can be formed into a generally cylindrical shape. Such a portable air purifier 1 can be shaped by a housing 10. Furthermore, the portable air purifier 1 of this embodiment draws in air through an inlet 32 ​​provided on one side of the housing 10 and discharges air through an outlet 36 provided on the other side of the housing 10.

[0085] The housing 10 can be composed of a first outer shell 20 and a second outer shell 60, which form the external framework of the portable air purifier 1. A plurality of components are housed within such a first outer shell 20 and second outer shell 60.

[0086] The first outer casing 20 may be formed with openings on both sides along a first direction, which is the length direction E. That is, the first outer casing 20 may have openings on both sides along the length direction E. An inlet 32 ​​may be provided on one side of the first outer casing 20 in the first direction, and a discharge part 36 may be provided on the other side of the first outer casing 20 in the first direction.

[0087] The inlet 32 ​​and the outlet 36 are located on opposite sides of the first housing 20. Furthermore, since the inlet 32 ​​and the outlet 36 are positioned facing each other, air moving through the inlet 32 ​​moves horizontally and is discharged through the outlet 36, thereby shortening the air's path and enabling smooth air circulation.

[0088] A second outer shell 60 is connected to the lower side of the first outer shell 20. The second outer shell 60 may be configured as a cylinder. Alternatively, the first outer shell 20 and the second outer shell 60 may be outer shells with a circular or elliptical cross-section that extends in the vertical direction.

[0089] The portable air purifier 1 can be a cylindrical shape that extends vertically in the vertical direction, or an elliptical cylindrical shape or a cylindrical shape with a curved surface on the outside.

[0090] Therefore, the portable air purifier 1 can be inserted into a recessed slot on the downward side of a cup support and installed stably. Furthermore, since the outer side of the portable air purifier 1 is curved, it is easy for the user to hold the outer side of the portable air purifier 1 and move it.

[0091] The directions are defined as follows: Using the second outer casing 60 as a reference, the direction where the first outer casing 20 is located is referred to as the upper part or upper side, and using the first outer casing 20 as a reference, the direction where the second outer casing 60 is located is referred to as the lower part or lower side. Furthermore, the "length direction E" and the "first direction" are the same direction, and the direction connecting the inlet portion 32 and the outlet portion 36 of the casing 10 is defined as the length direction E. In addition, the "width direction W" and the "second direction" are the same direction, which is a direction that forms a right angle with the length direction E and extends horizontally. Furthermore, both the length direction E and the width direction W are perpendicular to the vertical direction H. Furthermore, the vertical direction H and the vertical direction are the same direction. The above-described direction settings are based on the portable air purifier 1 being placed on the same plane as the horizontal line. The overall structure of a portable air purifier

[0092] Figure 5 is a perspective view showing the first outer casing 20 separated from the portable air purifier 1 according to an embodiment of the present invention; and Figures 6 and 7 are exploded perspective views of the portable air purifier 1 according to an embodiment of the present invention.

[0093] As shown in Figures 5 to 7, a portable air purifier 1 according to an embodiment of the present invention may include a housing 10, a filter 70, a fan module 140, a filter housing 80, and a sterilization unit 210.

[0094] The first outer casing 20 and the second outer casing 60 form the external framework of the portable air purifier 1. An accommodating space 22 is formed inside the first outer casing 20 and the second outer casing 60. Electrical components, including a filter 70, a filter housing 80, a fan module 140, a sterilization unit 210, and a battery 220, are housed within this accommodating space 22. Preferably, the first outer casing 20 and the second outer casing 60 have sufficient strength to protect the housed components from external impacts.

[0095] A filter 70 is disposed in the receiving space 22 of the first housing 20 and positioned between the fan module 140 and the inlet 32. That is, the filter 70 is spaced a predetermined distance from the fan module 140 and positioned on the longitudinal side E of the fan module 140. Therefore, the filter 70 purifies the air drawn in through the inlet 32 ​​of the portable air purifier 1. The purified air passes through the filter 70 and then through the fan module 140 and the exhaust portion 36, and is discharged laterally from the portable air purifier 1.

[0096] The filter 70 can be a single filter, or multiple filters can be stacked as needed. Furthermore, the filter 70 is used to secure the filter housing 80.

[0097] The filter housing 80 is fixed inside the first housing 20, and an insertion space for accommodating the filter is formed inside the filter housing 80.

[0098] The fan module 140 is housed in the receiving space 22 inside the first housing 20 and can be configured between the discharge section 36 and the filter 70. More specifically, the fan module 140 can be configured between the discharge section 36 and the filter housing 80. Furthermore, the sterilization section 210 can be provided inside the filter housing 80, or between the filter housing 80 and the fan module 140, and various other variations are possible.

[0099] The fan module 140 is located on the other side of the filter 70 in the first direction, and an exhaust section 36 is provided on the other side of the first housing 20 facing the fan module 140. Such a fan module 140 has the function of drawing in air that flows into one side of the filter 70 through the inlet section 32, and discharging the air to the other side of the first housing 20 through the exhaust section 36 provided on the other side of the first housing 20.

[0100] This embodiment shows that the fan module 140 includes a diagonal-flow fan. Such a fan module 140 can draw in air passing through the filter 70 axially and discharge it in a direction between the axial and radial directions.

[0101] The sterilization unit 210 is located between the filter 70 and the fan module 140, and can be fixed to at least one of the filter housing 80 and the fan module 140.

[0102] The sterilization unit 210 can be fixed to the filter housing 80. However, according to another embodiment of the present invention, the sterilization unit 210 can be fixed to the fan module 140, or fixed between the fan module 140 and the filter housing 80, or fixed to the housing 10, etc., which can be implemented in various ways.

[0103] If the sterilization unit 210 is fixed to the fan module 140, production costs will increase because an additional bracket is required to fix the sterilization unit 210 to the fan module 140. Furthermore, since the sterilization unit 210 is shaped to protrude outwards from the fan module 140, the size of the filter housing 80 and the filter 70 is reduced, potentially decreasing air filtration performance. Additionally, if the sterilization unit 210 is integrally disposed inside the fan module 140, the size of the fan components is reduced due to the installation of the sterilization unit 210, resulting in a decrease in air delivery capacity. Moreover, with the sterilization unit 210 installed in the fan module 140, the frictional resistance between the air drawn into the fan module 140 and the sterilization unit 210 increases, potentially reducing air delivery capacity.

[0104] In this invention, in order to solve the above-mentioned problems, the sterilization part 210 is fixed to the filter housing 80.

[0105] Since the sterilization unit 210 of one embodiment of the present invention is fixed to the filter housing 80, the sterilization light irradiated from the sterilization unit 210 is not interfered with by the filter housing 80 and irradiates the filter 70, thereby preventing a decrease in the sterilization performance of the sterilization unit 210. If the sterilization unit 210 is fixed to the fan module 140, the sterilization light irradiated from the sterilization unit 210 may be reduced because the sterilization light irradiated from the sterilization unit 210 is interfered with by the filter housing 80 that fixes the filter 70.

[0106] Furthermore, the filter housing 80, the sterilization unit 210, and the filter 70 constitute a module and are installed inside the housing 10. Since the sterilization unit 210 uses sterilization light to sterilize the filter 70, the installation position of the sterilization unit 210 and the distance between the filter 70 and the sterilization unit 210 are important design factors.

[0107] Therefore, when the filter housing 80, the sterilization section 210 and the filter 70 are configured as a module, even if the installation position of the fan module 140 and the like changes due to the model of the portable air purifier 1, the distance between the sterilization section 210 and the filter 70 is a fixed design element, so the sterilization of the filter 70 can be stably achieved, and the cost increase caused by design changes can be reduced.

[0108] Furthermore, since the sterilization unit 210 is installed inside the filter housing 80, there is no need for an additional bracket to fix the sterilization unit 210, which reduces production costs. Also, because the sterilization unit 210 is installed inside the filter housing 80, the size of the fan module 140 and the filter 70 is prevented from becoming smaller due to the installation of the sterilization unit 210, thereby preventing a reduction in air delivery capacity and air filtration capacity.

[0109] Furthermore, since the sterilization section 210 fixed to the filter housing 80 is arranged separately from the fan module 140, the area of ​​the inlet for air to be drawn into the fan module 140 is not reduced. However, when the fan module 140 is fixed to the sterilization section 210, the area of ​​the inlet for air to be drawn into the fan module 140 will be reduced, which may reduce the air delivery capacity.

[0110] Therefore, the sterilization unit 210 can be fixed to at least one of the filter housing 80, the fan module 140, and the housing, but it is more preferable to fix the sterilization unit 210 to the filter housing 80.

[0111] The sterilization unit 210 is separated from the filter 70 by a set distance, and sterilization light is irradiated toward the filter 70. Since the sterilization light irradiated from the sterilization unit 210 is harmful to the human body, the installation position of the sterilization unit 210 is set to prevent the sterilization light from flowing out to the outside of the portable air purifier 1 through the inlet 32.

[0112] Furthermore, since a sterilization section 210 is provided between the filter 70 and the fan module 140 to sterilize the filter 70, air pollution can be blocked. The sterilization section 210 is provided between the filter housing 80 supporting the filter 70 and the fan module 140, and sterilization of the filter 70 can be achieved using sterilization light irradiated from the sterilization section 210. Moreover, since the sterilization section 210 is located between the fan module 140 and the filter 70, and irradiates sterilization light towards the filter 70 which blocks the inlet 32, harmful sterilization light can be prevented from exposing to the outside of the housing 10.

[0113] The battery 220 is disposed in the accommodating space 22 inside the second housing 60 and can supply power for driving the portable air purifier 1. Component Configuration Structure of Portable Air Purifiers

[0114] Figure 8 is a view showing the airflow path through a portable air purifier 1 in a horizontal direction according to an embodiment of the present invention; Figure 10 is a plan sectional view of a portable air purifier 1 according to an embodiment of the present invention; and Figure 11 is a view showing the direction of air movement through a portable air purifier 1 according to an embodiment of the present invention.

[0115] As shown in Figures 2, 8, 10, and 11, the internal storage space 22 of the portable air purifier 1 can be divided into a first region A and a second region B. When the storage space 22 is divided along the vertical direction H, the upper region becomes the first region A, and the lower region becomes the second region B. It should be clarified that the first region A and the second region B are not physically divided regions, but are only conceptually distinguished regions.

[0116] In one embodiment of the present invention, the accommodating space 22 of the first outer shell 20 forming the skeleton of the portable air purifier 1 is designated as a first region A, and the accommodating space 22 inside the second outer shell 60 is designated as a second region B.

[0117] The first region A is equipped with structural components related to air intake, purification, and exhaust. Specifically, the first region A includes an inlet 32, a filter 70, a fan module 140, and an exhaust 36. A filter housing 80 and a sterilization unit 210 may also be added as needed. Therefore, airflow is achieved in the first region A, penetrating the first housing 20 and flowing horizontally.

[0118] An inlet portion 32, serving as a passage for air intake, is provided on one side of the first housing 20 (the right side as referenced in FIG8), and this inlet portion 32 has a plurality of inlet holes 34. An outlet portion 36, serving as a passage for discharging purified air from the first region A, is provided on the other side of the first housing 20 (the left side as referenced in FIG8), and this outlet portion 36 has a plurality of outlet holes 38. Therefore, an airflow path in the longitudinal direction E connecting the inlet portion 32, the filter 70, the fan module 140, and the outlet portion 36 is formed inside the first housing 20.

[0119] That is, the first area A is equipped with an inlet 32, a filter 70, a filter housing 80, a sterilization section 210 and an exhaust section 36. When the air drawn into the portable air purifier 1 passes through the interior of the air purifier, the required flow path is formed in the first area A.

[0120] The second area B contains structural components that are not directly related to the airflow used for air purification. That is, the second area B may contain a control unit including a PCB and a battery 220.

[0121] According to this embodiment, the first outer shell 20 and the second outer shell 60 are formed into a cylindrical or elliptical cylindrical shape in which the length in the vertical direction H is longer than the lateral length. Furthermore, the length in the vertical direction H of the upper first region A is longer than the length in the vertical direction H of the lower second region B. That is, when the portable air purifier 1 is placed vertically, the upper first region A will occupy a wider area than the lower second region B.

[0122] A battery 220 may be disposed inside the second housing 60, on which the second region B is formed. The battery 220 may be configured to have a weight greater than the sum of the weights of the fan module 140, filter 70, filter housing 80, and sterilization section 210.

[0123] Typically, since the weight per unit volume of battery 220 is much greater than that of fan module 140, filter 70, filter housing 80 and sterilization section 210, even without artificially increasing the weight or size of battery 220, battery 220 will have a greater weight than fan module 140, filter 70, filter housing 80 and sterilization section 210.

[0124] When the battery 220, which is the weight of the portable air purifier 1 as described above, is disposed at the lower part of the portable air purifier 1, the center of gravity of the portable air purifier 1 will be shifted downward from the center in the vertical direction H to the lower part. That is, the center of gravity of the portable air purifier 1 will move towards the lower part of the portable air purifier 1 where the battery 220 is disposed.

[0125] With the center of gravity of the portable air purifier 1 shifted towards the lower part of the portable air purifier 1 where the battery 220 is located, as described above, the risk of the portable air purifier 1 being tipped over is reduced when it is placed vertically.

[0126] That is, when the portable air purifier 1 is placed vertically, the center of gravity of the portable air purifier 1 is located on the lower side because of the battery 220 located at the bottom of the portable air purifier 1, so the portable air purifier 1 will not easily tip over.

[0127] Furthermore, when the battery 220, which is a weight, is located at the bottom of the portable air purifier 1, the other components constituting the portable air purifier 1 need to be located at a higher position than the battery 220. That is, structural elements related to air intake, purification, and exhaust, as well as the sterilization section 210 for the sterilization filter 70, need to be located at a higher position than the battery 220.

[0128] To ensure that the portable air purifier 1 can smoothly utilize the required charging capacity of the battery 220, the size of the battery 220 needs to be at least a predetermined size. Therefore, the portable air purifier 1 also needs to be equipped with an installation space of at least a predetermined size for installing the battery 220. Furthermore, since it is not easy to form an airflow path in the space where the battery 220 is located, the structural components related to air intake, purification, and exhaust can only be arranged in a position that avoids the battery 220, that is, at a position higher than the battery 220.

[0129] Due to this configuration, in the portable air purifier 1, the flow path for air intake, purification, and exhaust is formed in a first region A at a position higher than that of the battery 220. Therefore, the air intake into the portable air purifier 1 and the purified air exhaust from the portable air purifier 1 will also occur at a position higher than that where the battery 220 is located.

[0130] When purified air is discharged from the upper part of the portable air purifier 1 as described above, the purified air in the portable air purifier 1 can more easily reach the user's face.

[0131] When the portable air purifier 1 is placed on the ground below the user's face, it is more advantageous to use it vertically rather than horizontally to increase the amount of purified air from the portable air purifier 1 reaching the user's face.

[0132] Therefore, when the portable air purifier 1 is placed vertically, if the purified air is discharged from the top of the portable air purifier 1, the amount of purified air in the portable air purifier 1 that reaches the user's face can be increased.

[0133] Furthermore, since the battery 220, which is a weight, is located at the bottom of the portable air purifier 1, the structure in which the structural components related to air intake, purification, and exhaust are located at a higher position than the battery 220 can also help to expand the installation range of the portable air purifier 1.

[0134] As an example, when the portable air purifier 1 is used with the cup support inserted inside the vehicle, the area for air intake and the area for air purification and exhaust can be positioned higher than the cup support. Therefore, the portable air purifier 1 can maintain a high level of air purification performance while being stably placed inside the vehicle. For this purpose, the vertical length H of the second region B, where the battery 220 is located, is preferably set to be above the depth of the cup support.

[0135] As another example, when the lower area of ​​the portable air purifier 1 is fixed using a clip-type support or the like, the portable air purifier 1 can be stably fixed without blocking the area where the air is drawn in and the area where the purified air is discharged.

[0136] Furthermore, even when the user holds the lower part of the portable air purifier 1 and moves it, the portable air purifier 1 can be moved stably without blocking the area where air is drawn in and the area where purified air is discharged.

[0137] That is, by arranging structural elements such as the battery 220 that are not directly related to the airflow used for air purification in the lower part of the portable air purifier 1, and by using the lower part of the portable air purifier 1 to place and fix the portable air purifier 1, it is possible to simultaneously provide the portable air purifier 1 with high-level air purification performance and stable fixation.

[0138] In a portable air purifier 1 according to an embodiment of the present invention having the aforementioned structure, a first housing 20 having an inlet portion 32 and an outlet portion 36 is disposed on the upper side of a second housing 60. The first housing 20 is connected to the upper side of the second housing 60, on which electrical components are mounted, and the first housing 20 is provided with an inlet portion 32 for drawing in air and an outlet portion 36 for discharging air. Therefore, when a structure having a downwardly recessed groove shape, such as a cup support, is inserted into the first housing 20, air can be easily drawn in into the inside of the first housing 20 through the inlet portion 32 and air can be discharged laterally into the first housing 20 through the outlet portion 36, thereby improving air purification efficiency.

[0139] The inner space of the first outer casing 20 can be divided, with reference to a first horizontal center line P1, into a direction toward the inlet 32 ​​and a direction toward the outlet 36. The first horizontal center line P1 is a virtual line passing through the center of the casing 10 and extending horizontally. Furthermore, the first horizontal center line P1 is located between the inlet 32 ​​and the outlet 36.

[0140] With this first horizontal centerline P1 as a reference, a filter 70 is arranged in the direction towards the inlet 32, and a fan module 140 and a sterilization section 210 are arranged in the direction towards the outlet 36. Therefore, air passing through the inlet 32 ​​will pass through the filter 70 and move towards the inside of the fan module 140 while impurities in the air are removed. Therefore, since the fan module 140 can be prevented from being contaminated by impurities contained in the air, the durability of the fan module 140 can be improved, and maintenance and repair costs can also be reduced.

[0141] Furthermore, since the sterilization unit 210 utilizes the sterilization light to sterilize the filter 70, it is necessary to ensure the irradiation distance for irradiating the sterilization light. Therefore, when the sterilization unit 210 is located on the first horizontal center line P1, or is set in the area facing the inlet 32 ​​with the first horizontal center line P1 as a reference, the installation area of ​​the filter 70 is excessively reduced, resulting in a decrease in air purification performance.

[0142] As shown in Figure 11, the area from the first horizontal centerline P1 toward the entrance 32 is the area between the first horizontal centerline P1 and the entrance 32.

[0143] Therefore, with the sterilization section 210 located in the area between the first horizontal centerline P1 and the discharge section 36, the irradiation distance for irradiating sterilizing light from the sterilization section 210 toward the filter 70 can be stably ensured. Furthermore, since the installation area of ​​the filter 70 for removing impurities from the air flowing in through the inlet section 32 can be ensured, a reduction in air purification performance can be prevented.

[0144] However, when the sterilization section 210 is positioned on the first horizontal centerline P1, or between the first horizontal centerline P1 and the inlet section 32, it is impossible to reliably ensure the irradiation distance for irradiating sterilizing light from the sterilization section 210 towards the filter 70. Therefore, since sterilization of the filter 70 is not adequately achieved, contaminated air may be discharged.

[0145] Furthermore, if the installation area of ​​the filter 70 is reduced in order to ensure the irradiation distance for irradiating the sterilizing light from the sterilization section 210 toward the filter 70, the air purification performance may be reduced. In order to solve the problem described above, the sterilization section 210 is provided in the area centered on the first horizontal centerline P1 toward the discharge section 36. Therefore, the installation area of ​​the filter 70 is increased, thereby preventing the air purification performance from being reduced.

[0146] However, if an additional mounting bracket is added to fix the sterilization unit 210, the installation area of ​​the fan module 140 will be reduced, thereby reducing the air delivery capacity of the fan module 140 and resulting in a decrease in air purification performance.

[0147] In order to solve the problems mentioned above, and instead of adding an additional mounting bracket for fixing the sterilization unit 210, the sterilization unit 210 is fixed between the filter housing 80 and the fan module 140, or fixed inside the filter housing 80. Therefore, the increase in airflow resistance is minimized, thereby improving air purification performance.

[0148] In other words, since the front of the sterilization unit 210 is supported by the filter housing 80 and the rear of the sterilization unit 210 is supported by the fan module 140, there is no need to add an additional fixing bracket for fixing the sterilization unit 210, thus minimizing the increase in airflow resistance. Furthermore, since the installation area of ​​the fan module 140 is not reduced, it is possible to prevent a decrease in the air delivery capacity of the fan module 140 and also to prevent a decrease in air purification performance caused by this.

[0149] Furthermore, the filter 70 is located inside the inlet 32, and the filter 70 is positioned so that both sides in the width direction W are in contact with the inside of the first housing 20. Therefore, since the sterilization light irradiating the filter 70 that shields the inlet 32 ​​is blocked from leaking to the outside of the housing 10, a safe operating environment can be provided. Detailed Structural Features of Portable Air Purifier Components

[0150] Figure 9 is an exploded perspective view of the housing 10 according to an embodiment of the present invention. As shown in Figures 8 and 9, a portable air purifier 1 according to an embodiment of the present invention may include at least one of the following: housing 10, filter 70, filter housing 80, fan module 140, sterilization unit 210, and battery 220.

[0151] An accommodating space 22 is formed inside the housing 10, and various variations can be implemented within the technical concept of having an inlet 32 ​​for drawing in air and an outlet 36 for discharging air. In one embodiment of the present invention, the housing 10 may include a first outer shell 20 and a second outer shell 60.

[0152] A filter 70, a sterilization section 210, and a fan module 140 are provided on the inner side of the first housing 20. Furthermore, an inlet 32 ​​is provided on one side of the first housing 20, and an exhaust section 36 for discharging air is provided on the other side facing the inlet 32. Such a first housing 20 can be constructed from a single component or, as needed, from multiple components. In one embodiment of the present invention, the first housing 20 may include a first housing body 30 and a maintenance door 50.

[0153] An accommodating space 22 is formed inside the first outer shell body 30. An inlet 32 ​​for drawing in air is provided on one side of the first outer shell body 30, and an outlet 36 is provided on the other side of the first outer shell body 30 facing the inlet 32.

[0154] The first outer casing 30 can be configured as a tube with a cylindrical or elliptical cross-section. As needed, the first outer casing 30 can have a cross-section in which the diameter in the width direction W is longer than the diameter in the length direction E and extends in the vertical direction. The side of such a first outer casing 30 is open and forms a maintenance space. A maintenance door 50 is provided on the side of the first outer casing 30 in a detachable manner.

[0155] The upper and lower sides of the first housing body 30, which has an inlet 32 ​​and an outlet 36 and a maintenance space on its sides, can be configured to be blocked. A maintenance door 50 is provided on the first housing body 30 in a manner that allows for easy installation and removal, thereby enabling the opening and closing of the maintenance space.

[0156] The first outer shell body 30 of one embodiment of the present invention may include at least one of an inlet portion 32, an outlet portion 36, a second mounting groove 40, a first protrusion 42, and a second protrusion 44.

[0157] The inlet portion 32 includes inlet grilles 33 extending in the vertical direction, with inlet holes 34 provided between a plurality of inlet grilles 33. The inlet grilles 33 may have a plurality of inlet holes 34 forming for drawing in air on one side of the housing 10. Since the cross-section of the inlet grilles 33 extends along the length direction E, the inlet holes 34 located between the inlet grilles 33 are also formed along the length direction E. Therefore, air flowing in through the inlet portion 32 is guided to move along the length direction E.

[0158] Since the inlet hole 34 guides the airflow flowing into the inside of the first housing 20 along the length direction E, it shortens the movement path of the air passing through the first housing 20 and purifies more air in a short time, thereby improving air cleaning efficiency.

[0159] Furthermore, since the inlet portion 32 extends vertically along one side of the first housing 20, that side of the first housing 20 will be used as a space for air intake. Also, because the inlet portion 32 is formed along the curved side of the first housing 20, the number of inlet holes 34 will increase compared to an inlet portion 32 that is parallel to the filter 70 and arranged along a straight line. Because the air intake flow rate is increased according to the shape of this inlet portion 32, air cleaning efficiency can be improved.

[0160] The discharge section 36 includes discharge grilles 37 extending in the vertical direction, with discharge holes 38 provided between a plurality of discharge grilles 37. A plurality of discharge holes 38 for discharging air may be provided on the other side of the housing 10 for each discharge grille 37. Since the cross-section of the discharge grilles 37 extends along the length direction E, the discharge holes 38 located between the discharge grilles 37 are also formed along the length direction E. Therefore, the air discharged through the discharge section 36 is guided to be discharged along the discharge grilles 37 in the length direction E.

[0161] Since the discharge port 38 guides the airflow that is discharged from the outside of the first housing 20 along the length direction E, it shortens the movement path of the air passing through the first housing 20 together with the inlet 32.

[0162] Furthermore, since the discharge section 36 extends vertically from the other side of the first housing 20, most of the space on the other side of the first housing 20 can be used as a space for air discharge. Also, because the discharge section 36 is formed along the curved side of the first housing 20, the number of discharge holes 38 increases compared to a discharge section 36 arranged parallel to the fan module 140 along a straight line. Because the air discharge flow rate is increased according to the shape of the discharge section 36, air cleaning efficiency can be improved.

[0163] Furthermore, the inlet hole 34 and the outlet hole 38 can be configured to face each other in the horizontal direction. Since the inlet hole 34 and the outlet hole 38 are positioned facing each other in the longitudinal direction E, the air flowing in through the inlet hole 34, after moving horizontally, will be discharged to the outside of the first housing 20 through the outlet hole 38. Therefore, by guiding the air through the first housing 20 to achieve the shortest possible path, the frictional resistance during air movement is minimized, and the airflow capacity is improved to purify more air in a shorter time, thus improving air cleaning efficiency. Furthermore, the power consumption required for the operation of the fan module 140 is reduced, thereby saving on electricity costs.

[0164] Furthermore, the length of the inlet 32 ​​in the width direction W is shorter than the length of the filter 70 in the width direction W. Therefore, air flowing into the inlet 32 ​​will pass through the filter 70 and be purified, thereby improving air cleaning performance. If the length of the inlet 32 ​​in the width direction W is the same as or smaller than the length of the filter 70 in the width direction W, the air flowing into the inlet 32 ​​may fail to pass through the filter 70 and move directly towards the fan module 140, which may reduce air purification capacity.

[0165] A first protrusion 42 and a second protrusion 44, protruding inwards from the first housing body 30, engage with the filter housing 80 and constrain its movement. The first protrusion 42 and the second protrusion 44 are located on the inner side of the first housing body 30 facing the maintenance door 50, and fix the first fixing protrusion 130 and the second fixing protrusion 132 of the filter housing 80 (described later). Because the first protrusion 42 and the second protrusion 44 are positioned facing the maintenance door 50, they can be seen by the operator when the maintenance door 50 is separated. Therefore, since the filter housing 80 fastened to the first protrusion 42 and the second protrusion 44 can be easily separated, the time and cost required for maintenance and repair work, including the replacement of the filter 70, can be saved.

[0166] The fan module 140 can be inserted into the first mounting slot 56 and the second mounting slot 40 on one side and the other side of its width direction W to constrain its movement. The first mounting slot 56 is a slot shape that extends vertically along the inside of the maintenance door 50, and the second mounting slot 40 is a slot shape that extends vertically along the inside of the first housing body 30.

[0167] Since the first mounting groove 56 and the second mounting groove 40 are respectively arranged on both sides of the exhaust section 36 in the width direction W, the two side corners of the fan module 140 can be inserted into the first mounting groove 56 and the second mounting groove 40, thereby achieving stable fixation of the fan module 140. Furthermore, since no additional bracket is used to fix the fan module 140, a miniaturized design of the portable air purifier 1 can be achieved, and production costs and maintenance and repair costs can be saved due to the reduction in the number of parts.

[0168] The maintenance door 50 is detachably mounted on the first housing body 30, and various variations can be implemented within the technical concept of a maintenance space provided on the side of the first housing body 30 for opening and closing. In one embodiment of the present invention, the maintenance door 50 may include at least one of a door body 52, a spacer-holding protrusion 54, and a first mounting groove 56.

[0169] The door body 52, which forms an opening on the side of the first outer casing 30 for maintenance, can be implemented in various ways. In one embodiment of the invention, the door body 52 has a curved cross-section and extends vertically. The door body 52 is detachably mounted on the side of the first outer casing 20 located between the inlet portion 32 and the outlet portion 36.

[0170] The spacer-retaining protrusion 54 protrudes inward toward the door body 52 and can be implemented in various ways within the technical concept of extending toward at least one of the filter 70 and the filter housing 80. In one embodiment of the invention, the spacer-retaining protrusion 54 is plate-shaped, protrudes inward toward the door body 52 and contacts or is spaced apart from the sides of the filter housing 80 and the filter 70 at a predetermined distance.

[0171] The spacer protrusions are multiple and contact or are spaced apart from the sides of the filter housing 80 and the filter 70 at predetermined intervals. This prevents the filter housing 80 and the filter 70 from tilting toward the maintenance door 50 and guides them to be positioned in the designated location.

[0172] A first mounting groove 56 is formed along the vertical direction on the inner side of the door body 52. ​​The first mounting groove 56 is formed along the vertical direction on the inner side of the door body 52 where it contacts the corner of the fan module 140. Furthermore, a second mounting groove 40 is also provided on the inner side of the first outer casing 30 facing the first mounting groove 56, with a groove formed along the vertical direction.

[0173] The first mounting slot 56 and the second mounting slot 40 are respectively provided on both sides of the discharge section 36 in the width direction W. Therefore, the two corners of the fan module 140 in the width direction W can be inserted into the inner sides of the first mounting slot 56 and the second mounting slot 40 and placed stably.

[0174] The second housing 60 is connected to the lower part of the first housing 20. Various variations can be implemented within the technical concept of forming a space inside the second housing 60 for configuring electrical components containing the battery 220.

[0175] The cross-section of at least one of the first outer shell 20 and the second outer shell 60 may be circular or elliptical. Both the first outer shell 20 and the second outer shell 60 may be cylindrical or elliptical, or only the second outer shell 60 may be cylindrical or elliptical. Alternatively, if necessary, only the first outer shell 20 may be cylindrical or elliptical.

[0176] When the second housing 60 is configured as a cylinder or ellipse and extends along the vertical direction H, the user can easily hold the outer periphery of the second housing 60 by hand, and can also easily place the second housing 60 on the cup support of a vehicle with a generally circular cross-section.

[0177] Furthermore, when the first outer shell 20 is configured as a cylinder or an ellipse, the friction generated when air moving horizontally through the inner side of the first outer shell 20 comes into contact with the curved inner side of the first outer shell 20 will be reduced, thereby enabling smoother airflow.

[0178] Furthermore, since an airflow path is formed on the inner side of the first housing 20 but not on the inner side of the second housing 60, air can be smoothly drawn in and expelled through the first housing 20 even when the second housing 60 is placed on a cup support or held by the user's hand, thereby improving ease of use.

[0179] Furthermore, since the second housing 60 is placed in a structure with a downwardly recessed groove shape, such as a cup support, and can draw in air through the inlet 32 ​​provided on the first housing 20 without being interfered with by the external structure, the air purification performance can be improved.

[0180] Furthermore, since the cross-section of the housing 10 is circular or elliptical, the housing 10 can be stably placed in the groove of the support member with a circular cross-section, and the distance between the housing 10 and the cup support member is reduced, thereby reducing the possibility of vibration and noise.

[0181] The first outer shell 20 and the second outer shell 60 can be molded separately and then assembled, or they can be molded as a single piece, allowing for various variations.

[0182] Figure 12 is a front view showing the state in which the sterilization section 210 is disposed between the fan module 140 and the filter 70 according to an embodiment of the present invention; Figures 13 and 14 are perspective views showing the state in which the filter housing 80 is located between the sterilization section 210 and the filter 70 according to an embodiment of the present invention.

[0183] As shown in Figures 12 to 14, the filter 70 is disposed inside the first housing 20, and various variations can be implemented within the technical concept of purifying the air flowing into the inside of the inlet 32. In one embodiment of the present invention, the filter 70 can be formed in a cuboid shape. Since the filter 70 is disposed inside the filter housing 80 and can be easily separated from the filter housing 80, the time required for filter replacement can be saved.

[0184] In one embodiment of the present invention, a filter 70 is disposed inside the housing 10 facing the inlet portion 32. The filter 70 is located inside the housing 10 and is disposed in a shape facing the inlet portion 32. Since the two sides of the filter 70 in the width direction W are disposed in contact with the inside of the housing 10, the air flowing in through the inlet portion 32 is guided to move toward the filter 70, thereby improving the air purification performance.

[0185] Furthermore, since the filter 70 is a cuboid shape extending vertically, the area of ​​the filter 70 in contact with air can be increased, thereby improving air purification performance. In addition, since the filter 70 is installed inside the filter housing 80 and its movement is restricted, it is possible to prevent a decrease in air purification performance due to the movement of the filter 70.

[0186] According to this embodiment, the inlet 32, filter 70, fan module 140, and exhaust 36 are arranged along a first direction, and the airflow can also occur in the same direction. That is, the airflow caused by the operation of the fan module 140 can be realized in a straight line direction that is the same as the arrangement direction of the inlet 32, filter 70, fan module 140, and exhaust 36.

[0187] When airflow is achieved in a straight line as described above, the resistance to airflow is reduced accordingly, allowing for smoother airflow. Therefore, since the fan module 140 can achieve sufficient air intake and corresponding sufficient air exhaust, the air purification performance of the portable air purifier 1 can be improved accordingly.

[0188] Figure 15 is a perspective view showing a filter housing 80 according to an embodiment of the present invention.

[0189] As shown in Figures 13 to 15, the filter housing 80 and the filter 70 can be combined to form a module, and the sterilization part 210 can be combined with the structural elements. That is, since the filter housing 80, the filter 70 and the sterilization part 210 can form a single module, the time and cost required for product assembly and maintenance can be saved.

[0190] Furthermore, the filter 70 is detachably configured in the filter housing 80, and the filter housing 80 can be located between the filter 70 and the fan module 140. The filter housing 80 can also guide air movement from the filter 70 to the fan module 140. Moreover, various variations can be implemented within the technical concept of providing the sterilization section 210 at a position separating the filter 70 from the sterilization section 210. In one embodiment of the present invention, the filter housing 80 may include at least one of the following: a housing body 90, a flow path guide 100, a fixing support 110, a locking protrusion 120, a first fixing protrusion 130, a second fixing protrusion 132, and a first engaging protrusion 134.

[0191] The outer casing 90 is fixed to the inside of the housing 10, and various variations can be implemented within the technical concept of mounting the filter 70 on the inside. The outer casing 90 forms the external framework of the filter housing 80.

[0192] In this embodiment, the housing body 90 is formed as a frame with four sides open along its length E. An insertion space for accommodating the filter 70 is formed inside the housing body 90. Furthermore, the rear of the housing body 90 is open, thereby forming a channel for inserting the filter 70 into the insertion space inside the housing body 90.

[0193] The filter 70 is installed in the insertion space inside the housing body 90. A mounting groove or locking protrusion 120 may also be provided on the inner side of the housing body 90, so that the filter 70 can be securely installed inside the housing body 90.

[0194] The outer casing 90 has openings on both sides along its length direction E. The length direction E of the side of the outer casing 90 facing the maintenance door 50 in the width direction W is shorter than the length direction E of the side of the outer casing 90 facing the width direction W. Therefore, when the maintenance door 50 is separated from the first outer casing 30 and the filter 70 is replaced, the filter 70 can be easily pulled out through one side of the outer casing 90, thus saving time required for filter 70 replacement.

[0195] The flow path guide 100 is disposed on one side of the housing body 90, and various variations can be implemented within the technical concept of forming a channel for air to move from the filter 70 to the fan module 140. In one embodiment of the present invention, the flow path guide 100 is located between the filter 70 and the fan module 140, and has a plurality of through holes 102 formed therein.

[0196] With reference to the filter housing 80, the direction in which the filter 70 is located is referred to as the rear, and the direction in which the discharge part 36 is located is referred to as the front. The flow path guide part 100 is connected to the housing body 90 located in front of the filter 70. The through hole 102 is formed in a manner that extends through in the front-rear direction. Such a through hole 102 forms a channel for moving the air passing through the filter 70 toward the fan module 140. That is, a plurality of through holes 102 are provided on the front surface of the filter housing 80, and each through hole 102 is formed through in the front-rear direction on the front surface of the filter housing 80.

[0197] Such through holes 102 can also be formed in the form of hexagons. Furthermore, a plurality of through holes 102 are arranged in a honeycomb shape, thereby forming a honeycomb structure on the front surface of the filter housing 80.

[0198] By forming a honeycomb structure on the front surface of the filter housing 80 as described above, it is possible not only to ensure the passage for airflow, but also to achieve goals such as ensuring the rigidity of the filter housing 80 and its lightweight.

[0199] The fixing support portion 110 can be located at the middle of the width direction W of the flow path guide portion 100. Furthermore, the fixing support portion 110 extends in the vertical direction and can be implemented in various ways within the technical concept of having a protrusion supporting the sterilization portion 210. In one embodiment of the present invention, the fixing support portion 110 may include a filter frame 112 and a fixing protrusion 116.

[0200] The filter frame 112 has an inner hole 114 extending in the vertical direction, and its width W sides are connected to the flow path guide portion 100. The filter frame 112 is connected to the outer casing body 90 in the vertical direction H, forming a frame with a four-sided border shape extending in the vertical direction. The shape of the inner hole 114 corresponds to the shape of the sterilization part 210. Therefore, it is easy to set the sterilization part 210 to a state where it is inserted into the inner hole 114.

[0201] The fixing protrusions 116 are a plurality of protrusions protruding from the filter frame 112 toward the inner hole 114. Various variations can be implemented within the technical concept of the fixing protrusions 116 constraining the movement of the sterilization part 210 disposed in the inner hole 114. In one embodiment of the present invention, the fixing protrusions 116 are located between the sterilization part 210 disposed on the inner hole 114 and the filter 70, and prevent the sterilization part 210 from tilting toward the filter 70.

[0202] Since the flow path guide 100 is provided on both sides of the fixed support 110 and extends in the vertical direction and has a plurality of through holes 102, the air passing through the filter housing 80 can be moved toward the fan module 140.

[0203] Various variations can be implemented within the technical concept of the locking protrusion 120 protruding inwards from the outer casing 90 and constraining the movement of the filter 70. In one embodiment of the present invention, the locking protrusion 120 is a strip-shaped protrusion protruding inwards from the outer casing 90, and its installation position is set taking into account the irradiation angle of the sterilization section 210. Since the locking protrusion 120 is arranged in a strip shape along the inner periphery of the outer casing 90, the filter 70, which is locked by the locking protrusion 120, is separated from the sterilization section 210 by a set distance. Therefore, the sterilization light from the sterilization section 210 irradiates the entire side of the filter 70 it faces, thereby improving the sterilization effect of the filter 70.

[0204] The first fixing protrusion 130 protrudes upward toward the outer casing body 90 and can be fixed to the first protrusion 42 provided inside the casing 10. The second fixing protrusion 132 protrudes downward toward the outer casing body 90 and can be fixed to the second protrusion 44 provided inside the casing 10. When the first fixing protrusion 130 and the first protrusion 42 face each other, the movement of the first fixing protrusion 130 can be restrained by tightening bolts. Similarly, when the second fixing protrusion 132 and the second protrusion 44 face each other, the movement of the second fixing protrusion 132 can be restrained by tightening bolts.

[0205] Furthermore, since the first engagement protrusion 134, which protrudes from the housing body 90 toward the fan module 140, is inserted into the fan module 140, the engagement of the filter housing 80 and the fan module 140 is easily achieved. If necessary, the filter housing 80 and the fan module 140 can also be composed of a single module. Such a first engagement protrusion 134 is in the shape of a circular tube and extends along the length direction E in front of the housing body 90.

[0206] Figure 16 is a view showing the state in which the sterilization section 210 is disposed in the center of the fan module 140 according to an embodiment of the present invention; and Figure 17 is a perspective view showing the state in which the fan housing 150 is separated from the fan module 140 according to an embodiment of the present invention.

[0207] As shown in Figures 12, 16 and 17, the fan module 140 is disposed inside the housing 10 facing the exhaust section 36, and various variations can be implemented within the technical concept of drawing in air from the rear of the portable air purifier 1 and expelling air from the front.

[0208] The fan module 140 is housed in the receiving space 22 of the housing 10 and can be configured in the first region A. In the fan module 140, the two fan housings 150 and the fan component 160 can be configured as a module and arranged in the vertical direction.

[0209] The fan module 140 can be disposed between the exhaust section 36 and the filter housing 80, and more specifically, between the exhaust section 36 and the sterilization section 210. Therefore, the fan module 140 has the function of blowing air and, together with the filter housing 80, constraining the movement of the sterilization section 210.

[0210] The length of the fan module 140 in the width direction W is longer than the length of the exhaust portion in the width direction W. Therefore, the fan module 140 is fixed inside the first housing 20 located on both sides of the exhaust portion in the width direction W. Air discharged forward from the fan module moves along the inner curved surface of the first housing 20 located between the fan module 140 and the exhaust portion, and is then discharged forward of the portable air purifier 1 through the exhaust portion. That is, since the inner curved surface of the first housing 20 located between the fan module 140 and the exhaust portion acts as an air guide to guide the movement of air toward the exhaust portion 36, the straight air delivery function is improved.

[0211] Since the front two side corners of the fan module 140 are inserted into the first mounting groove 56 and the second mounting groove 40 provided inside the housing 10 and their movement is constrained, the shape of the first housing 20 does not need to be increased due to fixing or fastening the fan module 140, thereby enabling product miniaturization. Furthermore, when the portable air purifier 1 of the present invention is used in a vehicle, the size of the portable air purifier 1 that can be inserted into the cup support can be achieved.

[0212] The fan component 160 of the present invention is rotated by a motor. It is possible to connect only the shaft of the motor to the fan component 160, or to provide a rotor in the fan component 160 and a stator in the fan housing 150 where rotation is constrained. Due to the change in the magnetic field of the stator, a shaft connected to the fan component 160 rotates together with the rotor, thereby allowing the rotor and the fan component 160 to rotate around the stator. Since the structural components of the motor of the rotating fan component 160 are known, a detailed description thereof will be omitted.

[0213] A fan module 140 according to an embodiment of the present invention may include a fan housing 150, a fan component 160, and a fan base 200.

[0214] FIG18 is a perspective view showing a fan housing 150 according to an embodiment of the present invention; and FIG19 is a perspective view showing the inner side of a fan housing 150 according to an embodiment of the present invention.

[0215] As shown in Figures 17 to 19, the fan housing 150 is fixed inside the housing 10, and various variations can be implemented within the technical concept of having a space inside for rotating the fan component 160.

[0216] Furthermore, the fan housing 150 can be attached to the fan base 200 in a manner that surrounds the fan component 160. Moreover, since the fan housing 150, the fan component 160, and the fan base 200 can be configured as a module, product assembly and maintenance operations can be easily achieved.

[0217] A fan housing 150 according to an embodiment of the present invention may include at least one of a support plate 151, a connecting bracket 152, a wire guide 153, a side support 154, a wire fixing protrusion 155, a protrusion 156, a side wing 157, and a center guide 158.

[0218] The support plate 151 is plate-shaped and positioned facing the fan component 160, with a hole in its center. A motor can be mounted in the center of the support plate 151, or a shaft connected to the motor can be mounted along a first direction. This support plate 151 is located behind the discharge section 36.

[0219] The connecting bracket 152 extends outward from the support plate 151 and connects to the side support portion 154. In one embodiment of the present invention, a plurality of connecting brackets 152 may be provided, arranged in a rod-like manner. The connecting bracket 152 extending radially outward from the support plate 151 connects to the frame-shaped side support portion 154.

[0220] A wire guide 153 is connected to the connecting bracket 152 and supports the wires disposed along the side of the connecting bracket 152. The wire guide 153 is a protrusion located behind the side of the connecting bracket 152 and guides the motor wires disposed on the support plate 151 to extend outward toward the fan housing 150. The wire guide 153 can be disposed on the side of the connecting bracket 152 and form a recessed groove for arranging the wires. Therefore, since the wires disposed on the wire guide 153 are arranged in the recessed groove on the side of the connecting bracket 152 and are supported behind it by the wire guide 153, damage to the wires can be prevented.

[0221] The side support portion 154 can be varied in implementation within the technical concept of forming a circular or quadrilateral frame around the periphery of the support plate 151. In one embodiment of the present invention, the side support portion 154 is a frame shape with a quadrilateral border, and the two sides in the first direction are open. The outer side of the side support portion 154 contacts the inner side of the first outer shell 20, and the inner side of the side support portion 154 is connected to the connecting bracket 152.

[0222] The protruding post 156 extends behind the fan base 200 of the side support portion 154, and various variations can be implemented within the technical concept of providing a groove for insertion of the engaging protrusion 204 of the fan base 200 (described later). In one embodiment of the present invention, a plurality of protruding posts 156 are provided along the periphery of the side support portion 154.

[0223] The wire fixing protrusion 155 protrudes from the side support portion 154, and various variations can be implemented within the technical concept of setting it laterally on the wire located outside the connecting bracket 152 and constraining the wire from detachment. In one embodiment of the present invention, the wire fixing protrusion 155 is located in front of the wire that is guided along the corner of the connecting bracket 152 toward the fan housing 150, and constrains the wire to protrude forward toward the fan housing 150, thereby preventing damage to the wire.

[0224] Side wings 157 are connected to both sides of the side support portion 154 in the width direction W and are in the shape of a plate extending along the first direction. Side wings 157 extend in the vertical direction H and extend to the rear of the side support portion 154. Furthermore, side wings 157 act as air guides to move the air moved by the fan member 160 toward the exhaust portion 36, and also prevent the high-speed rotating fan member 160 from colliding with other objects.

[0225] The center guide 158 is in the shape of a circular tube and is fixed to the support plate 151. A hollow portion formed inside the center guide 158 extends along a first direction. Since a shaft connected to the fan component 160 is disposed inside the center guide 158, it acts as a guide shaft to rotate stably.

[0226] Figure 20 is a perspective view showing the shroud 190 of a fan component 160 according to an embodiment of the present invention; Figure 21 is a perspective view showing the shaft connection portion 172 of a fan component 160 according to an embodiment of the present invention; Figure 22 is a front view of a fan component 160 according to an embodiment of the present invention; Figure 23 is a view showing the hub 170 of a fan component 160 according to an embodiment of the present invention; and Figure 24 is a cross-sectional view of a fan component 160 according to an embodiment of the present invention.

[0227] As shown in Figures 20 to 24, the fan component 160 is rotatably disposed inside the fan housing 150, and various variations can be implemented within the technical concept of enabling air to move in the direction of the exhaust section 36.

[0228] A diagonal-flow fan can be used as the fan component 160, but this is only one embodiment of the present invention. Other types of fans can also be used as the fan component 160 of the present invention. The fan component 160 of one embodiment of the present invention may include at least one of a hub 170, a fan blade 180, and a shroud 190.

[0229] The hub 170 is located at the center of the fan housing 150 and can be implemented in various ways within the technical concept of receiving external power and rotating.

[0230] The hub 170 is disposed at the radial center of the fan component 160 and can rotate together with the rotor constituting the motor and the shaft serving as the motor output shaft. In one embodiment of the present invention, the hub 170 may include at least one of a hub plate portion 171, a shaft connection portion 172, an inner protrusion portion 175, and a skirt portion 177.

[0231] The hub portion 171 can be formed in a disk shape parallel to the support plate 151. A shaft coupling portion 172 can be provided in the hub portion 171. The shaft coupling portion 172 can be disposed at the radial center of the hub portion 171. Such a shaft coupling portion 172 can be formed by protruding from the hub portion 171 along a first direction.

[0232] The shaft coupling portion 172 can be coupled to the end of a shaft that transmits rotational power. For example, the coupling between the shaft coupling portion 172 and the shaft can be achieved by clamping and fixing the shaft in the shaft coupling portion 172.

[0233] A first reinforcing protrusion 173 is provided at predetermined intervals along the outer periphery of the shaft joint 172. The first reinforcing protrusion 173 is arranged radially with the shaft joint 172 as the center, forming a band-shaped protrusion on the outer side of the shaft joint 172. Therefore, since the stress concentrated on the shaft joint 172 is dispersed through the first reinforcing protrusion 173, the structural rigidity of the shaft joint 172 can be strengthened.

[0234] The inner protrusion 175 can protrude from the hub plate portion 171 toward the direction where the support plate 151 is provided. In one embodiment of the present invention, the inner protrusion 175 is provided in an arc direction along the outer edge of the hub plate portion 171. The inner protrusion 175 has a tubular shape extending along a first direction.

[0235] Furthermore, second reinforcing protrusions 176 are provided at predetermined intervals along the inner periphery of the inner protrusion 175. These second reinforcing protrusions 176 are provided along the inner surface of the inner protrusion 175 in a first direction, forming a band-shaped protrusion extending toward the shaft connection portion 172. Therefore, since the stress concentrated on the inner protrusion 175 is dispersed through the second reinforcing protrusions 176, the structural rigidity of the inner protrusion 175 can be strengthened. If necessary, the rotor of the motor portion can be fixed inside the inner side of the inner protrusion 175.

[0236] The skirt 177 can protrude from the edge of the hub plate portion 171 toward the support plate 151. The skirt 177 can be formed as an inclined surface that slopes radially outward as it moves away from the hub plate portion 171 along a first direction. The skirt 177 is located outside the inner protrusion 175, and its inner diameter increases as it moves toward the front of the hub plate portion 171.

[0237] For example, the shape in which the hub portion 171 and the skirt portion 177 are connected can be a truncated cone shape with a hollow portion formed inside and an opening on one side. The skirt portion 177 can be a funnel shape with an opening at the front and blocked at the rear by the hub portion 171.

[0238] The shield 190 is connected to the end of the fan blade 180 and is arranged in a ring shape. It can be implemented in various ways within the technical concept of being able to be separated from the fan base 200.

[0239] The shield 190 is provided along the outer periphery of the skirt 177, and the shield 190 and the skirt 177 are connected by the fan blade 180. Furthermore, the outer diameter of the hub 170 and the inner diameter of the shield 190 can gradually decrease from the discharge section 36 toward the inlet section 32.

[0240] The shroud 190 is radially spaced from the hub 170 along the fan module 140 at a predetermined interval and can be disposed radially outside the hub 170. Furthermore, the shroud 190 can be spaced from the hub 170 at intervals corresponding to the radial length of the fan blades 180. Additionally, each fan blade 180 can connect the skirt 177 disposed on the hub 170 and the shroud 190.

[0241] The shield 190 can be formed with an inclined surface that is substantially parallel to the skirt 177. In this embodiment, the skirt 177 and shield 190 are arranged such that the distance between them increases towards the front of the shield 190. In this invention, "front" refers to the direction from the center of the housing 10 toward the discharge portion 36, and "rear" refers to the direction from the center of the housing 10 toward the inlet portion 32.

[0242] The inlet protrusion 191 provided at the rear of the shield 190 is an annular protrusion that extends from the funnel-shaped shield 190 along a first direction. Since the inlet protrusion 191 is located inside the flared opening 202 described later, it can prevent the return air movement of air flowing in along the outside of the shield 190 to the inlet provided on the shield 190.

[0243] A plurality of fan blades 180 are provided and can be arranged at equal intervals along the outer peripheral surface of the hub 170. The fan blades 180 protrude outward from the hub 170 with the hub 170 as the center, and the fan blades 180 extend in a spiral manner. Furthermore, the plurality of fan blades 180 can be arranged at predetermined intervals along the peripheral direction of the hub 170.

[0244] In one embodiment of the present invention, the fan blade 180 can protrude from the center of the shaft connection portion 172 outward along a spirally extending centrifugal direction toward the skirt portion 177. Furthermore, when the direction from the outside of the shaft connection portion 172 toward the shaft connection portion 172 is referred to as radial, the radially inner side of the fan blade 180 can be connected to the skirt portion 177, and the radially outer side of the fan blade 180 can be connected to the shield 190 described later.

[0245] The skirt 177 is the portion of the hub 170 that is directly connected to the fan blade 180, and it is also the portion that is in direct contact with the air passing through the fan blade 180. Such a skirt 177 can also be largely correlated with the airflow path through the fan module 140.

[0246] The fan blades 180 connecting the shield 190 and the skirt 177 may include a first end 181, a second end 182, a first edge 183, and a second edge 184.

[0247] The first end portion 181 is disposed at the front end of the fan blade 180 in the direction of rotation and can be formed into a straight line extending radially. The direction of rotation can be defined as the direction in which the fan component 160 rotates.

[0248] The second end portion 182 is located at the rear end of the fan blade 180 in the direction of rotation and can be formed in a radial shape with the shaft joint portion 172 as the center.

[0249] The first edge 183 can connect one end of the first end 181 and one end of the second end 182. Such a first edge 183 can be connected to the inner peripheral surface of the cover 190.

[0250] The second edge 184 can connect the other end of the first end 181 and the other end of the second end 182. Such a second edge 184 can be attached to the outer peripheral surface of the hub 170.

[0251] That is, one end of the first end 181 and one end of the second end 182 can be connected to the inner peripheral surface of the cover 190. In addition, the other end of the first end 181 and the other end of the second end 182 can be connected to the outer peripheral surface of the skirt 177.

[0252] One end of the first end portion 181 can be positioned closer to the radial center of the hub portion 171 than one end of the second end portion 182. Furthermore, the other end of the second end portion 182 can be positioned closer to the radial center of the hub portion 171 than the other end of the first end portion 181. This is because one end and the other end of the first end portion 181 are positioned forward in the rotational direction compared to one end and the other end of the second end portion 182, and the skirt portion 177 is formed such that its radius narrows towards the front in the rotational direction.

[0253] According to this embodiment, the fan wing 180 is connected to the skirt 177 in the hub 170. In order to guide the airflow flowing into the fan module 140 in an upwardly inclined direction, the skirt 177 forms an inclined surface in an upwardly inclined direction.

[0254] Figure 25 is a perspective view showing the fan base 200 separated from the filter housing 80 according to an embodiment of the present invention; Figure 26 is a perspective view showing the fan base 200 according to an embodiment of the present invention; and Figure 27 is a view showing the sterilization section 210 set apart from the filter 70 according to an embodiment of the present invention.

[0255] As shown in Figures 25 to 27, the fan base 200 is attached to the rear of the fan housing 150, and various variations can be implemented within the technical concept of guiding air through the filter 70 into the fan component 160.

[0256] The fan base 200 can be disposed between the filter 70 and the fan component 160. The front of the fan base 200 is connected to the fan housing 150, and the rear of the fan base 200 is connected to the filter housing 80. Furthermore, the fan base 200 can support the front of the sterilization section 210, and the filter housing 80 supports the rear of the sterilization section 210. In addition, the fan base 200 has a movement channel for drawing air into the fan component 160, and the number of air movement channels described above can be the same as the number of fan components 160.

[0257] The fan base 200 is generally plate-shaped and can be shaped to correspond to the shape of the fan housing 150. For example, if the fan housing 150 is quadrilateral and is arranged continuously along the vertical direction, the fan base 200 combined with the fan housing 150 can also be formed as a rectangular plate extending along the vertical direction. In one embodiment of the present invention, the fan base 200 may include at least one of a base plate 201, a flared opening 202, a connecting protrusion 204, and a protruding rib 203.

[0258] The base plate 201 can be disposed between the filter housing 80 and the fan component 160. Such a base plate 201 is a rectangular plate shape extending along the vertical direction H, and has a hollow portion for air movement in its center. A plurality of hollow portions are provided and arranged along the vertical direction H.

[0259] The flared opening 202 is provided in a ring shape on the inner side of the base plate 201 facing the hollow part. The flared opening 202 has a concave longitudinal section to surround the end of the entrance protrusion 191 of the cover 190 and extends in the circumferential direction.

[0260] The flared opening 202 can be formed as the outer peripheral surface surrounding the hollow portion formed in the center of the base plate 201. The flared opening 202 protrudes rearward and can also form a groove that is recessed forward.

[0261] At least a portion of the flare 202 can be inserted radially inward into the shroud 190. This flare 202 guides the intake flow at the inlet of the fan module 140, thereby helping to improve the intake and exhaust performance of the fan module 140. Furthermore, because the flare 202 is formed with a convex curved surface at its rear, the increase in frictional resistance of the air moving forward through the flare 202 is reduced, thus allowing for smoother airflow.

[0262] Furthermore, the protrusion 204 protrudes forward from the base plate 201 along a first direction and engages with the groove of the protrusion 156 provided on the fan housing 150 in a clamping manner, thereby fixing the fan base 200 to the fan housing 150. The engagement between the protrusion 204 and the protrusion 156 allows for the engagement of the fan base 200 and the fan housing 150 at multiple locations. When the engagement between the fan base 200 and the filter housing is achieved as described above, the fan component 160 can be rotatably disposed between the fan base 200 and the fan housing 150.

[0263] The protruding rib 203 is provided in a ring-shaped manner surrounding the outer periphery of the flared opening 202, and can be provided parallel to the outer side of the fan component 160. Furthermore, the protruding rib 203 protrudes from the base plate 201 and can be disposed on the radially outer side of the flared opening 202.

[0264] Furthermore, the protruding rib 203 can be integrally formed with the base plate 201. More specifically, the base plate 201, the flared opening 202, and the protruding rib 203 can be integrally formed.

[0265] Furthermore, the protruding rib 203 can be inclined at the same angle as the outer surface of the cover 190, and the gap between the protruding rib 203 and the cover 190 can be kept constant. Such a protruding rib 203 can protrude in the form of an inclined surface. The inclined surface of the protruding rib 203 is separated from the cover 190 by a set interval, and can be formed as an inclined surface parallel to the inclined surface of the cover 190.

[0266] Furthermore, the inclined surface of the protruding rib 203 can have the same inclination angle as the inclined surface of the inner guide portion provided on the fan housing 150. Therefore, it is possible to prevent a portion of the air that has moved forward through the space between the shroud 190 and the skirt 177 from moving back towards the inlet of the fan component 160 through the space between the shroud 190 and the protruding rib 203. Thus, it is possible to suppress flow loss caused by backflow and increase the rigidity of the fan base 200 to suppress deformation of the fan base 200 caused by external forces.

[0267] Additionally, a ring-shaped engagement guide protrusion 205 may be provided behind the base plate 201 facing the protruding rib 203. After the first engagement protrusion 134 protruding towards the front of the filter housing 80 moves inward toward the engagement guide protrusion 205, it is inserted behind the engagement protrusion 204 and fixed by clamping.

[0268] If the first engagement protrusion 134 of the filter housing 80 is moved toward the inside of the engagement protrusion 204 of the fan base 200 and engaged without engaging the guide protrusion 205, the engagement force is reduced due to the reduced contact area between the first engagement protrusion 134 and the fan base 200, and thus the filter housing 80 may separate from the fan base 200.

[0269] To address this issue and achieve a compact design by suppressing the increase in the length E of the fan base 200 in the longitudinal direction, a connecting guide protrusion 205 is added. When the first connecting protrusion 134 engages with the fan base 200, the contact area between the first connecting protrusion 134 and the fan base 200 increases because the inner sides of the connecting guide protrusion 205 and the connecting protrusion 204 contact the outer side of the first connecting protrusion 134, thereby increasing the engagement force.

[0270] Figure 28 is a view showing the state in which sterilizing light is irradiated onto the filter 70 of the sterilization section 210 according to an embodiment of the present invention.

[0271] As shown in Figure 28, the sterilization unit 210 is installed on the filter housing 80, and various variations can be implemented within the technical concept of irradiating sterilization light toward the filter 70.

[0272] In one embodiment of the present invention, the sterilization unit 210 is inserted into the inner side of the filter frame 112 and can be locked by the fixing protrusion 116 to restrict its movement. Within the technical concept of preventing air pollution by minimizing the increase in airflow resistance, the installation position of the sterilization unit 210 can be varied.

[0273] As shown in Figure 15, the sterilization section 210 is located at the center of the width direction W of the filter housing 80 and can extend along the vertical direction.

[0274] Furthermore, as shown in Figure 16, the sterilization section 210 can be located at the center of the width direction W of the fan module 140. That is, since the front of the sterilization section 210 is located at the center of the width direction W of the fan module 140, and the rear of the sterilization section 210 is located at the center of the width direction W of the filter housing 80, the position of the sterilization section 210 is the optimal position selected to minimize the friction between it and the air moving from the filter housing 80 to the fan module 140, taking into account the irradiation distance and irradiation angle of the sterilization light.

[0275] In one embodiment of the present invention, two fan members 160 may be arranged along the sterilization section 210 and along the vertical direction. The upper end of the sterilization section 210 is positioned lower than the upper end of the hub 170 of the fan member 160 located above the sterilization section 210. Therefore, since the air intake flow path provided above the hub 170 of the fan member 160 located above the sterilization section 210 does not interfere with the air intake flow path, the increase in frictional resistance of the air flow path can be minimized.

[0276] Furthermore, the lower end of the sterilization section 210 is positioned higher than the lower end of the hub 170 of the fan component 160 located below the sterilization section 210. Therefore, since the air intake flow path provided below the hub 170 of the fan component 160 located below the sterilization section 210 does not interfere with the air intake flow path, the increase in frictional resistance of the air flow path can be minimized.

[0277] With a plurality of fan components 160 arranged sequentially along the vertical direction, since the upper and lower ends of the sterilization section 210 extending along the vertical direction do not protrude outward from the hub 170 of the fan component 160, the obstruction of the sterilization section 210 from the intake of air into the fan component 160 can be minimized. Therefore, the increase in flow resistance to the intake of air into the fan component 160 is minimized, thereby improving air purification performance.

[0278] The sterilization unit 210 of one embodiment of the present invention may include a printed circuit board 211 and a sterilization light source 212. The printed circuit board 211 is a rectangular plate extending in the vertical direction, with its front supported by the flared opening 202 of the fan base 200 and its rear supported by the fixing protrusion 116 of the filter housing 80.

[0279] The sterilization light source 212 can be a UVC LED, or other types of sterilization devices can be used within the technical concept of eliminating bacteria present in the filter 70. The sterilization light source 212 is disposed on both sides of the printed circuit board 211 in the vertical direction and irradiates sterilization light onto the filter 70.

[0280] The installation position and number of the sterilization light source 212 can be varied by considering the length H of the filter 70 in the vertical direction of the present invention. The irradiation angle of the sterilization light in the sterilization light source 212 of the present invention is 140 degrees to 160 degrees. Therefore, since the sterilization light irradiated by the sterilization light source 212 respectively provided on the upper and lower sides of the printed circuit board 211 reaches the filter 70 and a portion of the sterilization light is superimposed, sterilization treatment can be performed on the entire side located in front of the filter 70.

[0281] As shown in Figures 12 and 27, in one embodiment of the present invention, two fan housings 150 and fan components 160 are arranged in succession along the vertical direction of the fan base 200, and the rotation center axis of the fan component 160 can intersect the sterilization part 210 at a right angle.

[0282] A virtual line extending along the first direction through the rotation center of the upper fan component 160 is set as the third horizontal center line P3, and a virtual line extending along the first direction through the rotation center of the lower fan component 160 is set as the second horizontal center line P2.

[0283] When the virtual line intersecting the third horizontal center line P3 and the second horizontal center line P2 along the vertical direction is called the vertical virtual line V, the sterilization unit 210 is arranged parallel to the vertical virtual line V. If the sterilization unit 210 is arranged at an angle to the vertical virtual line V, the contact area with the air moving through the filter 70 and towards the fan module 140 will increase, and the frictional resistance generated when the air moves will increase, thus reducing the air cleaning performance.

[0284] However, when the sterilization section 210 is arranged parallel to the vertical virtual line V, its contact area with the air moving through the filter 70 and toward the fan module 140 is minimized, thereby minimizing the increase in frictional resistance generated when the air moves and preventing a decrease in air cleaning performance.

[0285] Figure 29 is a view showing the state in which the locking protrusion 117 is provided on the front surface of the sterilization section 210 according to an embodiment of the present invention. As shown in Figure 29, an additional locking protrusion 117 can be provided on the front of the sterilization section 210. When the sterilization section 210 is inserted into the inside of the filter frame 112 provided on the filter housing 80, the fixing protrusion 116 and the locking protrusion 117 protrude from the filter frame 112.

[0286] The fixing protrusion 116 is located behind the sterilization section 210, and the locking protrusion 117 is located in front of the sterilization section 210. The fixing protrusion 116 is located on the upper and lower sides of the sterilization section 210, and the locking protrusion 117 is located in the center of the sterilization section 210. Both are made of plastic and are capable of some degree of shape deformation. Therefore, when the sterilization section 210 is installed, the shapes of the fixing protrusion 116 and the locking protrusion 117 are deformed. Furthermore, after the sterilization section 210 is installed, the shapes of the fixing protrusion 116 and the locking protrusion 117 are restored to their original state. Airflow Patterns of Portable Air Purifiers

[0287] As shown in Figures 11 and 28, since the air flowing into the inlet 32 ​​is guided to move horizontally, after passing through the filter 70, filter housing 80 and fan module 140 in sequence, it is discharged to the outside of the housing 10 through the outlet 36. Therefore, the air movement path can be shortened to improve air purification performance.

[0288] Furthermore, since the sterilization section 210 is fixed in a shape that is inserted into the inside of the filter housing 80, the sterilization section 210 can be easily cooled by the air moving through the filter housing 80 to the fan module 140, thereby improving the durability of the sterilization section 210.

[0289] Furthermore, since the area of ​​air flowing into the inside of the housing 10 through the inlet 32 ​​is larger than the area of ​​the filter 70 facing the inlet 32, a large amount of air can move through the filter 70 to the fan module 140 even when the fan module 140 is operating at low speed, thus improving air cleaning efficiency.

[0290] Furthermore, since the filter housing 80 is provided in such a way as to surround the outer frame of the filter 70, the air passing through the filter 70 is prevented from moving in the first direction toward the inlet 32, but instead moves in the vertical direction H of the filter 70 through the frame of the filter 70, thereby ensuring the straight-line movement of the air.

[0291] Furthermore, the sterilization section 210 is located at the center of the filter housing 80 and the fan module 140 in the width direction W. Since the upper and lower ends of the sterilization section 210 do not protrude outward from the hub 170 provided on the upper and lower sides of the sterilization section 210, the increase in flow resistance caused by the sterilization section 210 is minimized. Therefore, not only is the airflow loss minimized, but also the effective intake and exhaust of air and filtration can be achieved.

[0292] In addition, air passes through filter 70, and in the process, physical particles such as dust / micro-dust / ultra-dust, chemical substances such as odor particles / harmful gases, and microorganisms such as bacteria / viruses contained in the air are filtered out.

[0293] Furthermore, since the centers of the inlet 32 ​​in the width direction W, the filter 70 in the width direction W, the filter housing 80 in the width direction W, the sterilization section 210 in the width direction W, the fan module 140 in the width direction W, and the outlet 36 in the width direction W are arranged in a straight line along the second horizontal center line P2, not only can flow loss be minimized, but also effective air intake and filtration can be achieved.

[0294] Air that has passed through filter 70 (i.e., purified air) can flow into the interior of fan module 140. The airflow can be guided by flare 202, thus effectively guiding the smooth flow of air into fan module 140.

[0295] Air flowing into the fan module 140 is discharged towards the front of the fan module 140. The air discharged towards the front of the fan module 140 can be discharged in a diagonal direction. The diagonal direction can be defined as the diagonal direction in front.

[0296] Air drawn into the central portion behind the fan module 140 moves forward through an annular exhaust port formed along the inner side of the fan module 140's frame, and also moves forward through the space formed between the support members of the rotating support. That is, because a diagonal-flow fan is used in the fan module 140, the air flowing into the rear of the fan module 140 is discharged in a forward-tilted direction, aligning the air movement channel and flow path of the rotating support, thereby reducing flow path losses.

[0297] Furthermore, the air exhausted in front of the fan module 140 moves along the inner curved surface of the first housing 20 located between the two corners of the fan module 140 in the width direction W and the two corners of the exhaust portion 36 in the width direction W, and is guided to move straight in the first direction, and is exhausted forward of the housing 10 through the exhaust portion. Since the inner side of the first housing 20 is curved, the inner diameter in the width direction W of the first housing 20 that contacts the fan module 140 decreases towards the exhaust portion 36. The first housing 20 acts as an air guide, allowing the air exiting the fan module 140 to move towards the exhaust portion 36. At this time, since the inner side of the first housing 20 forms a concave curved surface, the friction between it and the air moving from the fan module 140 towards the exhaust portion 36 is minimized, thereby improving the airflow performance and maintaining the straightness of the forward-moving air.

[0298] In addition, since the inlet grille 33 provided on the inlet section 32 and the outlet grille 37 provided on the outlet section 36 extend along the first direction, the air passing through the inlet grille 33 and the air discharged through the outlet grille 37 can move in a straight line along the first direction, shortening the movement path of the air passing through the housing 10 and improving the air delivery capacity. Configuration of each component and spacing settings between components

[0299] As shown in Figure 11, a first horizontal center line passing laterally through the center C of the housing 10 is located between the inlet 32 ​​and the outlet 36. The first horizontal center line is a virtual line passing through the portion with the largest inner diameter in the cross-section of the first housing 20. Furthermore, a second horizontal center line is perpendicular to the first horizontal center line and extends along the first direction.

[0300] The portable air purifier 1 of the present invention is characterized by having a generally cylindrical shape that extends along the vertical direction, and having a device for air purification and sterilization set within a set size for installation in a vehicle's cup holder. Therefore, the configuration of the various components is one of the important technical ideas of the present invention.

[0301] Since the configuration of the fan module 140 and the filter 70 is an important technology for the portable air purifier 1, with the first horizontal centerline as a reference, the filter 70 is arranged on the inlet side 32 and the fan module 140 is arranged on the exhaust side 36. Therefore, since the air that has passed through the filter 70 and removed impurities will pass through the fan module 140, the phenomenon of dust and other impurities being trapped in the fan module 140 is reduced, and the cost and time required for maintenance and repair can be saved.

[0302] Furthermore, the sterilization section 210 of the filter 70, which uses sterilization light to disinfect, needs to be separated from the filter 70 by a predetermined distance due to the irradiation angle of the sterilization light and the number and position of the sterilization light sources 212. Therefore, the sterilization section 210 is located in the direction toward the fan module 140 with the first horizontal center line as a reference. When the installation space of the fan module 140 is reduced, the air supply function will be significantly reduced. Therefore, it is not easy to reduce the installation space of the fan module 140. However, for the filter 70, if a high-performance filter is used, the installation space can also be reduced.

[0303] Therefore, when the distance between the first horizontal centerline P1 and the filter 70 is referred to as D1, and the distance between the first horizontal centerline P1 and the fan module 140 is referred to as D2, D1 and D2 have different values. Furthermore, it is preferable that D1 has a larger value than D2.

[0304] For example, when D1 and D2 are the same or D2 is greater than D1, the installation space of the fan module 140 is reduced compared to the past, which significantly reduces the air supply function and thus reduces the air cleaning efficiency.

[0305] On the other hand, when D1 has a value greater than D2, sufficient installation space for the fan module 140 is ensured, preventing a reduction in airflow capacity. Therefore, not only is sterilization achieved with the filter 70, but also a reduction in air purification efficiency is prevented. That is, since the airflow capacity of the fan module 140 is a crucial factor for air purification, the fan module 140 is positioned closer to the first horizontal centerline P1 than the filter 70. Consequently, the volume of the fan module 140 is larger than that of the filter 70.

[0306] Furthermore, the center of the housing 10 intersects the first horizontal centerline at a right angle, and the second horizontal centerline extending laterally passes through the center of the width direction W of the inlet 32, filter 70, sterilization section 210, fan module 140, and exhaust section 36. Therefore, the straightness of the air passing sequentially through the inlet 32, filter 70, sterilization section 210, fan module 140, and exhaust section 36 is further improved, thereby enhancing the air supply function and air cleaning efficiency.

[0307] In addition, since the sterilization unit 210 is fixed in the state of being inserted into the filter housing 80, the reduction in the length of the fan module 140 or the filter 70 in the first direction caused by the installation of the sterilization unit 210 can be minimized, thereby preventing the air supply function from being reduced compared to the past.

[0308] Furthermore, the rear of the sterilization unit 210 is supported by a fixing protrusion 116, and the front of the sterilization unit 210 is supported by the flare 202 of the fan base 200, or together with the flare 202, by a locking protrusion 117. Therefore, there is no need to equip an additional bracket for fixing the sterilization unit 210, and since the length of other components in the first direction is not reduced due to the additional bracket, excellent air purification function can be provided, and production and maintenance costs can be saved due to the reduction in the number of components.

[0309] Although the present invention has been described above with reference to the illustrated drawings, it is not limited to the embodiments and drawings disclosed in this specification. It is obvious that various modifications can be made by those skilled in the art within the scope of the technical concept of the invention. Furthermore, even if the effects corresponding to the structural elements of the present invention are not explicitly described in the foregoing description of the embodiments, the effects predictable from the corresponding structural elements should be considered.

[0310] 1: Air purifier 10: Shell 20: First outer shell 22: Storage space 30: First outer shell body 32:Entrance 33: Entrance grille 34: Entrance hole 36: Discharge section 37: Exhaust grille 38: Discharge port 40: Second mounting slot 42: First protruding post 44: Second convex post 50: Repair Door 52: Door body 54: Maintain the convexity at intervals 56: First mounting slot 60: Second outer shell 70: Filter 80: Filter housing 90: Outer shell 100: Flow path guiding section 102: Through hole 110: Fixed support part 112: Filter Frame 114: Inner hole 116: Fixed protrusion 117: Locking Protrusion 120: Locking Protrusion 130: First fixed protrusion 132: Second fixed protrusion 134: First connecting protrusion 140: Fan Module 150: Fan housing 151: Support plate 152: Connecting bracket 153: Wire guide 154: Side support section 155: Cable fixing protrusion 156: Convex column 157: Side Wings 158: Center Guide 160: Fan component 170: hub 171: Hub plate section 172: Shaft joint 173: First reinforcing protrusion 175: Inner protrusion 176: Second reinforcing protrusion 177: Skirt 180: Fan Wing 181: First end 182: Second end 183: First Edge 184: Second Edge 190: Shield 191: Entrance protrusion 200: Fan base 201: Base Plate 202: Trumpet Mouth 203: Protruding rib 204: Combined protrusion 205: Guide protrusion 210: Sterilization Department 211: Printed Circuit Board 212: Sterilization Light Source 220: Battery A: First Area B: Second Area C: Center D1, D2: Distance E: Length direction W: Width direction H: Up and down direction P1: First horizontal centerline P2: Second horizontal centerline P3: Third horizontal center line V: Vertical virtual line

Claims

1. A portable air purifier, comprising: A housing having an internal accommodating space, having an inlet for drawing in air and an outlet for discharging air; A filter is disposed on the inner side of the housing facing the inlet; a fan module is disposed on the inner side of the housing facing the outlet. A filter housing is located between the filter and the fan module, the filter being detachably mounted in the filter housing to guide the movement of air from the filter to the fan module; The filter housing includes a sterilization section installed on the filter housing to irradiate sterilization light onto the filter. The filter housing comprises: a housing body fixed to the inner side of the housing, in which the filter is installed; a flow path guide section disposed on one side of the housing body, forming a channel for air to move from the filter toward the fan module; and a fixing support section formed in the flow path guide section. The fixing support section includes an inner hole extending in a vertical direction, into which the sterilization section is inserted. The flow path guide section and the sterilization section are arranged in parallel. The sterilization section and the filter are positioned facing each other. Air flowing into the inlet is guided horizontally, passes sequentially through the filter, the filter housing, and the fan module, and is then discharged to the outside of the housing through the outlet section.

2. The portable air purifier according to claim 1, wherein, The housing includes: a first outer shell, on which the filter, the sterilization unit and the fan module are disposed on the inner side, with the inlet on one side and the outlet for discharging air on the other side facing the inlet; and a second outer shell connected to the lower part of the first outer shell.

3. The portable air purifier according to claim 2, wherein, An airflow path is formed on the inner side of the first housing, but no airflow path is formed on the inner side of the second housing.

4. The portable air purifier according to claim 2, wherein, The cross-section of at least one of the first housing and the second housing is circular or elliptical.

5. The portable air purifier according to claim 2, wherein, The first housing includes: a first housing body having the inlet and the outlet, and a maintenance space on the side; and a maintenance door disposed in the first housing body in a detachable manner to open and close the maintenance space.

6. The portable air purifier according to claim 5, wherein, The maintenance door includes: a door body disposed in a detachable manner on the first housing body; a spaced-retaining protrusion protruding inward of the door body and extending toward at least one of the filter and the filter housing; and a first mounting groove formed in a vertical direction on the inner side of the door body.

7. The portable air purifier according to claim 6, wherein, The first housing body further includes: a second mounting groove, which forms a groove along the vertical direction on the inner side of the first housing body facing the first mounting groove, wherein the fan module is inserted into the first mounting groove and the second mounting groove on one side and the other side in the width direction to constrain the movement of the fan module.

8. The portable air purifier according to claim 1, wherein, In the inlet section, one side of the housing is provided with a plurality of inlet grilles extending in the vertical direction to form an inlet hole, and in the outlet section, the other side of the housing is provided with a plurality of outlet grilles extending in the vertical direction to form an outlet hole, and the inlet hole and the outlet hole face each other in the horizontal direction.

9. The portable air purifier according to claim 1, wherein, The filter is located inside the housing and faces the inlet, with both sides of the filter in the width direction arranged to contact the inside of the housing.

10. The portable air purifier according to claim 1, wherein, The filter is in the shape of a cuboid extending in the vertical direction and is installed inside the filter housing to constrain the movement of the filter.

11. The portable air purifier according to claim 1, wherein, The filter housing further includes: a locking protrusion protruding into the inner side of the housing body to constrain the movement of the filter, wherein the filter, which is locked by the locking protrusion, is separated from the sterilization part by a set distance.

12. The portable air purifier according to claim 1, wherein, The filter housing further includes: a first fixing protrusion protruding upward toward the upper side of the housing body to fix a first protrusion disposed on the inner side of the housing; and a second fixing protrusion protruding downward toward the lower side of the housing body to fix a second protrusion disposed on the inner side of the housing.

13. The portable air purifier according to claim 1, wherein, The filter housing further includes: a first engagement protrusion protruding toward the fan module for insertion into the fan module.

14. The portable air purifier according to claim 1, wherein, The flow path guide is disposed on both sides of the fixed support, extends in the vertical direction, and has a plurality of through holes.

15. The portable air purifier according to claim 1, wherein, The fixed support includes: a filter frame including the inner hole for connecting the flow path guide; and a plurality of fixed protrusions protruding from the filter frame toward the inner hole, wherein when the sterilizing part is inserted into the inner hole, the movement of the sterilizing part is constrained by being stopped by the fixed protrusions.

16. The portable air purifier according to claim 1, wherein, The sterilization section is located at the center of the filter housing in the width direction and extends in the vertical direction.

17. The portable air purifier according to claim 1, wherein, The sterilization unit includes: a printed circuit board extending in the vertical direction; and a sterilization light source disposed on both sides of the printed circuit board in the vertical direction to irradiate sterilization light toward the filter.

18. The portable air purifier according to claim 1, wherein, Two fan components are arranged along the sterilization section in the vertical direction. The upper end of the sterilization section is positioned lower than the upper end of the hub of the fan component located on the upper side of the sterilization section, and the lower end of the sterilization section is positioned higher than the lower end of the hub of the fan component located on the lower side of the sterilization section.

19. The portable air purifier according to claim 1, wherein, The fan module includes: a fan housing fixed inside the housing; a fan component rotatably disposed inside the fan housing to move air toward the exhaust portion; and a fan base attached to the fan housing to guide air passing through the filter into the fan component.

20. The portable air purifier according to claim 19, wherein, Two fan housings and two fan components are provided in the vertical direction of the fan base, and the rotation center axis of the fan component intersects the sterilization part at a right angle.

21. The portable air purifier according to claim 19, wherein, The fan housing includes: a support plate disposed in a plate shape at a position facing the fan component; a connecting bracket extending outward from the support plate; a side support portion connected to the connecting bracket, forming a circular or quadrilateral frame around the periphery of the support plate; and a protruding post protruding from the side support portion toward the fan base for engaging with the fan base.

22. The portable air purifier according to claim 19, wherein, The fan component includes: a hub located at the center of the fan housing for receiving external power and rotating; a plurality of fan blades spaced at equal intervals along the outer circumferential surface of the hub; and a shroud connected to the ends of the fan blades and arranged in a ring to separate it from the fan base.

23. The portable air purifier according to claim 22, wherein, The fan base includes: a base plate, plate-shaped, having a hollow portion for air movement, extending in a vertical direction; a flared opening, annularly arranged on the inner side of the base plate facing the hollow portion, the flared opening having a concave longitudinal section to surround the lower side of an inlet protrusion of the shroud; and a connecting protrusion, protruding from the base plate to engage a protrusion of the fan housing.

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