Portable air purifier

Abstract

The present invention relates to a photocatalytic portable air purifier, which can maximize an air quality improvement effect by having a design structure optimized for a photocatalytic reaction due to the use of a photocatalytic method, and is also convenient to use and ensures safety.

Description

Technical Field

[0001] The present invention relates to a portable air purifier, and more particularly, to a photocatalytic portable air purifier capable of maximizing the air quality improvement effect by having a design structure optimized for photocatalytic reaction. Background Art

[0002] Recently, there has been an increasing concern about indoor and outdoor air pollution. As a result, there is a growing need for portable air purifiers to provide purified air to individuals or to purify the air in confined spaces such as vehicle interiors.

[0003] Most portable air purifiers in the related art adopt a filtering method or an electrostatic dust collection method. However, the filtering method causes the inconvenience of having to replace the filter regularly, and the electrostatic dust collection method causes the problem of generating nitrogen oxides or ozone that are harmful to the human body.

[0004] Therefore, it is necessary to develop a portable air purifier that is safe and easy to use.

[0005] [Related technical literature]

[0006] [Patent Document]

[0007] Korean Patent No.10-2189493 (registered on December 4, 2020) Summary of the invention

[0008] Technical issues

[0009] The present invention has been made in an effort to solve the above-mentioned problems, and an object of the present invention is to provide a photocatalytic portable air purifier which can maximize the air quality improvement effect by having a design structure optimized for the photocatalytic reaction, and uses a photocatalytic method to ensure convenient use and safety.

[0010] Technical Solution

[0011] A portable air purifier according to an example of the present invention may include: a shell having a ventilation portion; and a purification module accommodated in the shell and configured to purify air introduced through the ventilation portion of the shell, wherein the purification module includes: a light source configured to emit light; a photocatalytic component configured to perform a photocatalytic reaction by receiving light emitted from the light source; and a fan configured to circulate air between the outside and the inside of the shell, wherein the light source emits visible light, and wherein the photocatalytic component is configured to perform a photocatalytic reaction by receiving the visible light emitted from the light source.

[0012] A central column may be vertically provided at the center of the housing based on a radial direction, the light source may be installed on the central column, and the photocatalytic member may be installed to surround the central column.

[0013] The light source may be configured as a light emitting diode element.

[0014] The light emitting diode element may be provided as a plurality of light emitting diode elements arranged in a circumferential direction of the central column.

[0015] The light emitting diode element may be provided as a plurality of light emitting diode elements arranged in an axial direction of the central column.

[0016] The photocatalytic member may have a porous structure through which air passes.

[0017] An average pore diameter of pores formed in the photocatalytic member may be 1.0 mm or more and 4.0 mm or less, and a thickness of the photocatalytic member may be 3 mm or more and 10 mm or less.

[0018] The photocatalytic member may have a structure in which two or more unit photocatalytic members are stacked in the radial direction.

[0019] When any one of the stacked two or more unit photocatalytic members is referred to as a first unit photocatalytic member, and a unit photocatalytic member disposed radially outside the first unit photocatalytic member is referred to as a second unit photocatalytic member, the porosity of the first unit photocatalytic member may be higher than the porosity of the second unit photocatalytic member.

[0020] The photocatalytic member may be provided as a plurality of photocatalytic members each having a long plate shape and arranged vertically.

[0021] The purification module may further include a holder provided at a lower end side, and the photocatalytic member is inserted and fixed into the holder.

[0022] The central pillar may have a prism shape having a plurality of lateral surfaces, and the lateral surfaces of the central pillar may be configured to face the photocatalytic members, respectively.

[0023] The fan may be disposed above the photocatalytic member.

[0024] The purification module may further include a main circuit board, and the main circuit board is disposed at a lower side of the housing.

[0025] The center post may be a circuit board having a lower end connected to the main circuit board.

[0026] Beneficial Effects

[0027] According to the present invention, the air purifier has a design structure optimized for the photocatalytic reaction, thereby maximizing the air quality improvement effect, and the air purifier adopts the photocatalytic method, thereby ensuring convenient use and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a front perspective view of a portable air purifier according to an example of the present invention.

[0029] Figure 2 yes Figure 1 Rear view stereogram.

[0030] Figure 3 yes Figure 1 Side view of.

[0031] Figure 4 yes Figure 1 Exploded three-dimensional diagram.

[0032] Figure 5 yes Figure 1 Vertical cross-section of .

[0033] Figure 6 yes Figure 1 Horizontal cross-section of .

[0034] Figure 7 is a diagram showing a photocatalytic member according to an example of the present invention.

[0035] Figure 8 : is a diagram showing an arrangement structure of a light source and a photocatalytic member according to an example of the present invention.

[0036] Fig. 9 is shown with Figure 8 Figure 4. Configuration of the separated central column.

[0037] Fig.10 is a diagram showing a coupling relationship between a vertical frame and a photocatalytic member.

[0038] Fig.11 It is a diagram showing a state in which the vertical frame is disassembled.

[0039] Fig.12 It is a cross-section of a vertical frame.

[0040] Fig.13 yes Figure 1 Top view of the . DETAILED DESCRIPTION

[0041] Hereinafter, the present invention will be described with reference to the accompanying drawings.

[0042] Figure 1is a front perspective view of a portable air purifier according to an example of the present invention, Figure 2 yes Figure 1 The rear view of Figure 3 yes Figure 1 Side view of Figure 4 yes Figure 1 Exploded stereogram of Figure 5 yes Figure 1 A vertical cross-section of Figure 6 yes Figure 1 Horizontal cross-section of .

[0043] Preferably, as shown in the figure, the portable air purifier 10 of the present invention has a full-length cylindrical structure and is configured to stand vertically on the ground or floor surface. The portable air purifier 10 can be configured to be portable and used by being inserted into a cup holder in a vehicle. The portable air purifier 10 can be configured to have a diameter of about 70 mm so that the portable air purifier 10 can be universally inserted into a cup holder in a vehicle. In addition, an anti-skid pad 130 may be provided on the bottom of the portable air purifier 10 to prevent sliding. For example, the anti-skid pad 130 may be made of a PVC material having a high coefficient of friction.

[0044] Return to reference Figures 1 to 6 The portable air purifier 10 of the present invention broadly includes a housing 100 and a purification module 200 .

[0045] The housing 100 is configured to accommodate the purification module 200 therein and has a full-length cylindrical structure. The housing 100 has a ventilation portion 110 through which external air can be introduced and a discharge portion 120 through which the air introduced into the housing 100 can be discharged to the outside. For example, the ventilation portion 110 may have a plurality of ventilation holes and be formed on the lower side surface of the housing 100. The discharge portion 120 may be an open end of the cylindrical structure and have a structure that opens upward from the upper end of the housing 100. Therefore, as Figure 3 As shown, air is introduced into a laterally lower region of the housing 100 , and the introduced air may be discharged upward from the housing 100 .

[0046] The purification module 200 is accommodated in the housing 100 and is configured to purify air introduced through the ventilation portion 110 of the housing 100. The purification module 200 may generally include various types of components accommodated in the housing 100.

[0047] Specifically, the purification module 200 includes a light source 210 configured to emit light, a photocatalytic member 220 configured to perform a photocatalytic reaction by receiving light emitted from the light source 210 , and a fan 230 configured to circulate air between the inside and the outside of the housing 100 .

[0048] The fan 230 may be disposed at the upper side of the housing 100, more specifically above the photocatalytic member 220. Therefore, as described above, air may be introduced into the lower lateral side of the housing 100 by operation of the fan 230, and the air may be discharged upward from the housing 100.

[0049] In this case, in the present invention, the light source 210 is configured to emit visible light, and the photocatalytic member 220 is configured to perform a photocatalytic reaction by receiving the visible light emitted from the light source 210. Specifically, the light source 210 may emit visible light having a wavelength of about 400 nm to 700 nm, and the photocatalytic member 220 may be made of a material (e.g., a material including TiO2, Wo3, Pt, etc.) that performs a photocatalytic reaction by receiving visible light. Therefore, when the photocatalytic member 220 is irradiated with visible light, a photocatalytic reaction occurs on the surface of the photocatalytic member 220, and superoxide radicals are generated. The superoxide radicals generated as described above have a high oxidation potential and oxidize harmful substances in the air to render the harmful substances harmless.

[0050] That is, the portable air purifier 10 of the present invention adopts a photocatalytic method in addition to the filtering method or the electrostatic dust collection method in the related art, and the photocatalyst can be used semi-permanently without separate replacement, so that the convenience of use and maintenance is ensured compared with the filtering method in the related art that requires the replacement of the filter. Because the superoxide radicals generated by the photocatalytic reaction react with harmful substances in the air and disappear immediately when the superoxide radicals are generated, the superoxide radicals are harmless to the human body. Therefore, compared with the electrostatic dust collection method in the related art that produces nitrogen oxides or ozone that are harmful to the human body, the portable air purifier 10 can ensure stability.

[0051] In addition, the present invention is configured to use a photocatalytic method to be implemented by visible light, so that the amount of energy used can be reduced compared to a photocatalytic method that uses ultraviolet rays while requiring a large amount of energy. In addition, unlike a method that requires the installation of a light-blocking film or the like to prevent ultraviolet rays from being directly introduced into the eyes, visible light is harmless to the human body and does not require the installation of a separate light-blocking film or the like, so that the entire configuration can be simplified and the stability of use can be improved.

[0052] Hereinafter, the present invention will be described in more detail with reference to specified embodiments.

[0053] First, the photocatalytic member 220 will be described. Figure 7220 is a diagram showing a photocatalytic member according to an example of the present invention. As shown in the figure, the photocatalytic member 220 may have a porous structure in which holes are formed in the entire area and all holes are connected. More specifically, the photocatalytic member 220 may have a structure in which the porous structure is coated with a photocatalyst. The porous structure may be made of various materials such as metal, plastic, and paper. That is, the photocatalytic member 220 may have a structure in which a permeable device through which air can pass is coated with a photocatalyst.

[0054] In this case, the photocatalytic member 220 may be formed such that the average diameter of the pores 220h formed in the photocatalytic member 220 is greater than the average width of the substrate 220m constituting the photocatalytic member 220. That is, in the total volume of the photocatalytic member 220, the volume occupied by the pores may be greater than the volume occupied by the substrate. For example, the porosity of the photocatalytic member 220 may be 50% or more. Simultaneously or individually, the average pore size (i.e., pore diameter) of the pores 220h of the photocatalytic member 220 may be 1.0 mm or more and 4.0 mm or less, and the thickness (220_w) of the photocatalytic member 220 may be 3 mm or more and 10 mm or less.

[0055] As described above, since the photocatalytic member 220 is made of a porous material having a high porosity, the flow resistance of air passing through the photocatalytic member 220 may be reduced, and the air may easily circulate between the inside and the outside of the housing 100 .

[0056] In addition, for example, Figure 8 As shown, the photocatalytic member 220 includes two or more unit photocatalytic members 221 and 222, and has a structure in which the corresponding unit photocatalytic members 221 and 222 are stacked in two or more layers in the radial direction. The corresponding unit photocatalytic members 221 and 222 may have different porosities. Specifically, among the unit photocatalytic members 221 and 222 stacked in two or more layers, the unit photocatalytic member 221 positioned relatively radially inward is referred to as a first unit photocatalytic member 221, and the unit photocatalytic member 222 positioned relatively radially outward is referred to as a second unit photocatalytic member 222. In this case, the porosity of the first unit photocatalytic member 221 may be higher than the porosity of the second unit photocatalytic member 222. At the same time or separately, the average pore size of the pores in the first unit photocatalytic member 221 may be larger than the average pore size of the pores formed in the second unit photocatalytic member 222.

[0057] With the above configuration, the transmittance of light passing through the first unit photocatalytic member 221 increases, so that a larger amount of light can be introduced into the surface of the second unit photocatalytic member 222. Therefore, the surface reaction area between the photocatalytic member 220 and the light emitted from the light source 210 is fully increased, so that the air purification performance of the purification module 200 can be improved.

[0058] Next, since the air purification performance of the purification module 200 is proportional to the surface reaction area between the light source 210 and the photocatalytic member 220, it is advantageous to appropriately design and arrange the light source 210 and the photocatalytic member 220 to maximize the surface reaction area of ​​the photocatalyst. To this end, in the present invention, the light source 210 is installed at the center of the housing 100, and the photocatalytic member 220 is installed around the housing 100 to surround the light source 210.

[0059] Figure 8 is a diagram showing an arrangement structure of a light source and a photocatalytic member according to an example of the present invention, Fig. 9 is shown with Figure 8 FIG. 1 is a diagram of a central column 240 configured to separate the photocatalyst. As shown in the figure, the central column 240 is vertically arranged at the center of the housing 100 based on the radial direction. The light source 210 is mounted on the central column 240, and the photocatalytic member 220 is installed around the central column 240. This structure can effectively use the limited internal space of the housing 100, and ensure a maximum large surface reaction area of ​​the photocatalyst, and can also ensure smooth flow of air.

[0060] In this case, the light source 210 may be configured as a light emitting diode element. A light emitting diode element refers to a semiconductor element that emits light by current. A light emitting diode element requires lower power consumption than a bulb or lamp type light source and has a longer lifespan.

[0061] Since the light emitting diode element is provided in the form of a point light source, a plurality of light emitting diode elements may be provided to cover the photocatalytic member 220 having a large area. Fig. 9 , a plurality of light emitting diode elements (for example, Fig. 9 The plurality of light emitting diode elements are spaced apart from each other in the circumferential direction of the central column 240. Simultaneously or individually, the plurality of light emitting diode elements (e.g., Fig. 9The first element 210-v-1, the second element 210-v-2 and the third element 210-v-3 in the vertical direction of the center column 240 can be arranged to be spaced apart from each other in the axial direction of the center column 240. That is, the light source 210 has a structure in which a plurality of light emitting diode elements are arranged in an array shape. Therefore, light can be omnidirectionally emitted at 360 degrees based on the center column 240 and omnidirectionally emitted in the height direction, so that the entire surface of the omnidirectionally arranged photocatalytic member 220 can be irradiated with light.

[0062] Return to reference Figure 4 and Fig. 9 , the purification module 200 also includes a main circuit board 260. The main circuit board 260 refers to a circuit board for controlling the power to circuit components such as the fan 230 or the light source 210. The main circuit board 260 can be closely attached to the lower part of the housing 100, that is, the bottom surface of the housing 100. Alternatively, the main circuit board 260 can be spaced apart from the bottom surface at a predetermined interval and arranged near the bottom surface. As described above, because the main circuit board 260 is arranged at the bottom side of the housing 100, the main circuit board 260 does not hinder the flow of air in the housing 100.

[0063] Return to reference Figure 5 , Figure 6 and Fig. 9 , the center column 240 can be configured as a circuit board having a lower end connected to the main circuit board 260. That is, the center column 240 itself can be configured as a circuit board. The center column 240 can control the power to the light source 210 mounted on the center column 240 under the control of the main circuit board 260. This configuration helps to improve packaging characteristics and assemblability by eliminating a separate wire for controlling the light source 210.

[0064] Meanwhile, the shape of the photocatalytic member 220 is not particularly limited as long as the photocatalytic member 220 is configured to surround the outside of the central pillar 240. For example, although not shown, the photocatalytic member 220 defines a cylindrical shape surrounding the entire central pillar 240. In order to ensure ease of assembly, the photocatalytic member has a structure in which two separate parts are coupled to each other.

[0065] Alternatively, instead, a plurality of photocatalytic members 220 may be arranged in an array shape. Figure 8 As shown, the photocatalytic member 220 may be provided as a plurality of photocatalytic members 220-1, 220-2, 220-3 and 220-4 each having an elongated plate shape. This configuration is advantageous in terms of convenience in manufacturing the photocatalytic member.

[0066] In this case, the photocatalytic members 220-1, 220-2, 220-3 and 220-4 may be symmetrically installed with respect to the central pillar 240 to surround the central pillar 240. The photocatalytic members 220-1, 220-2, 220-3 and 220-4 may be disposed perpendicular to the bottom surface and parallel to the central pillar 240. Fig. 9 As shown, the central pillar 240 is configured in a prism shape having a plurality of lateral surfaces. The lateral surfaces of the central pillar 240 may face the photocatalytic members 220, respectively. Figure 8 and Fig. 9 A structure is shown in which four photocatalytic members 220 are disposed to be spaced apart from each other, and a central pillar 240 has four lateral surfaces such that the lateral surfaces of the central pillar 240 face the photocatalytic members 220-1, 220-2, 220-3, and 220-4, respectively.

[0067] In addition, as described above, based on the structure in which the plurality of photocatalytic members 220 are separately configured, the purification module 200 may further include a vertical frame 250 . Fig.10 2 is a diagram showing the connection relationship between the vertical frame and the photocatalytic member. As shown in the figure, the purification module 200 also includes a vertical frame 250 vertically arranged at the outer side of the purification module 200 based on the radial direction. The vertical frame 250 is arranged between two adjacent photocatalytic members 220. That is, in this example, the four vertical frames 250 are configured so that the four vertical frames 250 can be arranged between four photocatalytic members 220 that are separately configured. The vertical frame 250 can block the gap between two adjacent photocatalytic members 220 and prevent air from being introduced into the gap, thereby improving the purification efficiency.

[0068] Fig.11 is a diagram showing a state where the vertical frame is disassembled, and Fig.12 250 is a cross-sectional view of a vertical frame. As shown in the figure, an outer surface 251 of the vertical frame 250 directed toward the housing 100 is formed as a curved surface. This structure is used to separate the air introduced into the outer surface 251 of the vertical frame 250 toward two opposite sides and guide the air to the photocatalytic member 220 provided at two opposite sides of the vertical frame 250. Therefore, this structure helps to purify all the air introduced into the housing 100.

[0069] In addition, therefore, the lateral surface of the housing 100 directed toward the vertical frame 250 may be closed. Return to Reference Figure 1 and Figure 2As described above, the ventilation portion 110 having a plurality of ventilation holes is formed on the lower side surface of the housing 100. However, there is a closed portion 110c in which no ventilation holes are formed in a predetermined area in the circumferential direction. The vertical frame 250 may be disposed behind the closed portion 110c. This configuration may substantially prevent air from being introduced into the vertical frame 250, i.e., into the gap between two adjacent photocatalytic members 220, and further facilitates the concentrated introduction of air into the photocatalytic member 220.

[0070] At the same time, return to reference Fig.11 and Fig.12 , a hollow portion 252 may be formed in the vertical frame 250 along the axial direction. Figure 6 As shown, the wire 203 can be installed in the corresponding hollow part 252. In order to facilitate the installation of the wire 203, one side of the hollow part 252 can be opened. The wire 203 can be a wire for electrically connecting the main circuit board 260 and the fan 230. As described above, because the main circuit board 260 is arranged at the lower side of the housing 100, and the fan 230 is arranged at the upper side of the housing 100, a wire is required to connect the main circuit board 260 and the fan 230. In the present invention, the hollow part is formed in the vertical frame 250, and the wire 203 is arranged in the corresponding hollow part, so that the wire can be organized in the housing 100 concisely and protected. In addition to the fan 230, the wire can connect the power button 201, the power terminal 202 and the illuminator 270, which will be described below. This type of wire 203 can be installed in the hollow part 252 of the vertical frame 250.

[0071] In addition, if Fig.11 and Fig.12 As shown, the vertical frame 250 may have a flange portion 253 protruding outward, and the photocatalytic member 220 may be seated and supported on the flange portion 253 of the vertical frame 250. That is, the vertical frame 250 may have a flange portion 253 that is a seating structure that protrudes to a predetermined extent from two opposite horizontal sides of the vertical frame 250 in the axial direction of the vertical frame 250. At least a portion of the outer periphery of the photocatalytic member 220 may be closely attached to and seated on the corresponding flange portion 253. This may help to fasten and fix the photocatalytic member 220 in the housing 100.

[0072] In addition, if Figure 8 As shown, the holder 205 may be provided at the lower end side of the purification module 200, and the lower end portion of the photocatalytic member 220 may be inserted and fixed to the corresponding holder 205. In the case where the photocatalytic member 220 has a structure in which the unit photocatalytic members 221 and 222 are stacked in two or more layers as described above, this may help to more effectively fix the photocatalytic member 220.

[0073] Return to reference Figures 1 to 4 The housing 100 has a complete elongated cylindrical shape and is configured to stand vertically to the ground, that is, configured so that its axial direction is parallel to the direction of gravity. The housing 100 has a constant diameter from its lower end to a predetermined height. This provides a structural advantage that allows the housing 100 to be inserted into a cup holder in a vehicle.

[0074] The housing 100 may have a structure in which a lower housing 100L and an upper housing 100U are coupled, which facilitates assembling the purification module 200 in the housing 100. In this case, the ventilation portion 110 may be formed on a lateral surface of the lower housing 100L, the discharge portion 120 may be formed at an upper end of the upper housing 100U, and the lower housing 100L may have a constant diameter. The lower housing 100L may be longer than the upper housing 100U.

[0075] In addition, a predetermined portion of the upper housing 100U set based on the height direction of the upper housing 100U can be formed to be narrow. That is, the diameter of the upper housing 100U decreases from a predetermined position in the height direction, and then the diameter of the upper housing 100U increases, so that its central portion can be narrower than other portions. Therefore, the outer cross-section of the upper housing 100U can be curved. As described above, the predetermined portion of the housing 100 is recessed and has a small diameter, so that the user can easily grasp the portable air purifier 10 by using the corresponding portion. In addition, the diameter of the airflow channel is increased so that when the air is discharged from the inside of the housing 100 to the outside, the purified air can be widely diffused in the horizontal direction. In addition, the recessed shape allows the portable air purifier 10 of the present invention to be similar to the shape of a vase, thereby providing the user with aesthetic appearance satisfaction. The diameter of the upper end of the upper housing 100U can be smaller than the diameter of the lower end of the lower housing 100L.

[0076] Return to reference Figures 1 to 4 , the housing 100 has a power button 201 configured to operate the fan 230 and a power terminal 202 configured to receive power from the outside. In this case, the power button 201 and the power terminal 202 can be positioned above the center of the housing 100 based on the height direction. This allows the power button 201 and the power terminal 202 to be exposed to the outside even if the bottom of the portable air purifier 10 is inserted into the cup holder in the vehicle, thereby providing the user with convenience in manipulating the power button 201 and convenience in connection between the power terminal 202 and the cable.

[0077] In this case, the power button 201 can be configured to operate or stop the fan 230 and adjust the rotation intensity of the fan 230. For example, when the power button 201 is pressed once in a state where the fan 230 is stopped, the fan 230 can be operated and rotated with a first intensity. In this state, when the power button 201 is pressed again, the fan 230 can be rotated with a second intensity. In this state, when the power button 201 is pressed again, the fan 230 can be rotated with a third intensity. In this state, when the power button 201 is pressed again, the intensity of the fan 230 can return to the first intensity, or the fan 230 can be stopped. Simultaneously or individually, when the power button 201 is pressed for a preset time (e.g., for 2 seconds or longer), the operation of the fan 230 can be stopped. The first intensity, the second intensity, and the third intensity are different preset intensities, and the rotation intensity can increase as the number increases. The power button 201 can be configured to operate in the form of a physical button or a touch button.

[0078] In addition, a separate lighting lamp 270 may be used to indicate the current operating state and rotation intensity of the fan 230. Figure 4 and Figure 5 , an illumination lamp 270 configured to emit light is provided in the housing 100, and an illumination circuit board 271 configured to control the illumination lamp 270 may be further provided. For example, the illumination lamp 270 may be an LED lamp.

[0079] In addition, the illuminating lamp 270 can be operated in conjunction with the operation of the power button 201 and emit light when the fan 230 is operated. The illuminating lamp 270 can be configured to emit light with different colors according to the rotation intensity of the fan 230. For example, in the case where the fan 230 rotates with the first intensity as the power button 201 is pressed once, the illuminating lamp 270 can emit yellow light. In the case where the fan 230 rotates with the second intensity as the power button 201 is pressed twice, the illuminating lamp 270 can emit green light. In the case where the fan 230 rotates with the third intensity as the power button 201 is pressed three times, the illuminating lamp 270 can emit red light. In the case where the fan 230 is stopped by manipulating the power button 201, the illuminating lamp 270 can be switched to an off state. This can visually indicate the current operating state of the fan 230 to the user, thereby providing convenience of use and aesthetic appearance satisfaction.

[0080] Furthermore, the portion of the lighting lamp 270 that emits light may be positioned at the upper end of the housing 100 so that the lighting lamp 270 may emit light upward from the housing 100. This may help improve visibility of the light. Fig.13 yes Figure 1 The light emitting portion 270p of the illumination lamp 270 may be configured to be closely attached to the inner peripheral surface of the upper end of the upper housing 100U and exposed upward.

[0081] In addition, if Fig.13 As shown, the guard member 121 may be provided in the discharge portion 120 of the housing 100 and block a portion of the discharge portion 120. The guard member 121 may prevent a user's hand or external objects from being introduced into the housing 100 through the discharge portion 120. In this case, the guard member 121 may be provided in the form of petals and provide an aesthetic appearance, so that the portable air purifier 10 of the present invention resembles the shape of a vase.

[0082] Although the embodiments of the present invention have been described with reference to the accompanying drawings, it will be appreciated by those skilled in the art that the present invention may be implemented in any other specific form without changing its technical spirit or essential features. Therefore, it should be understood that the above embodiments are illustrative in all aspects and do not limit the present invention.

[0083] [Description of Reference Signs]

[0084] 10: portable air purifier, 100: housing, 110: ventilation part

[0085] 120: discharge part, 100U: upper shell, 100L: lower shell

[0086] 200: purification module, 210: light source, 220: photocatalytic component

[0087] 230: fan, 240: center column, 250: vertical frame

[0088] 260: Main circuit board, 270: Lighting lamp

Claims

1. A portable air purifier, comprising: a housing having a ventilated portion; as well as a purification module housed in the housing and configured to purify air introduced through the ventilation portion of the housing, Wherein, the purification module comprises: a light source configured to emit light; a photocatalytic member configured to perform a photocatalytic reaction by receiving light emitted from the light source; and a fan configured to circulate air between an exterior and an interior of the housing, wherein the light source emits visible light, and Wherein, the photocatalytic member is configured to perform a photocatalytic reaction by receiving the visible light emitted from the light source.

2. The portable air purifier according to claim 1, wherein: A central column is vertically arranged at the center of the housing based on a radial direction, Wherein, the light source is mounted on the central column, and Wherein, the photocatalytic member is installed to surround the central column.

3. The portable air purifier according to claim 2, wherein: The light source is configured as a light emitting diode element.

4. The portable air purifier according to claim 3, wherein: The light emitting diode element is provided as a plurality of light emitting diode elements arranged in a circumferential direction of the central column.

5. The portable air purifier according to claim 3, wherein: The light emitting diode element is provided as a plurality of light emitting diode elements arranged in an axial direction of the central column.

6. The portable air purifier according to claim 2, wherein: The photocatalytic member has a porous structure through which air passes.

7. The portable air purifier according to claim 6, wherein: An average pore diameter of pores formed in the photocatalytic member is 1.0 mm or more and 4.0 mm or less, and a thickness of the photocatalytic member is 3 mm or more and 10 mm or less.

8. The portable air purifier according to claim 6, wherein: The photocatalytic member has a structure in which two or more unit photocatalytic members are stacked in the radial direction.

9. The portable air purifier according to claim 8, wherein: When any one of the stacked two or more unit photocatalytic members is referred to as a first unit photocatalytic member, and a unit photocatalytic member disposed radially outside the first unit photocatalytic member is referred to as a second unit photocatalytic member, the porosity of the first unit photocatalytic member is higher than the porosity of the second unit photocatalytic member.

10. The portable air purifier according to claim 2, wherein: The photocatalytic member is provided as a plurality of photocatalytic members each having a long plate shape and arranged vertically.

11. The portable air purifier according to claim 10, wherein: The purification module further includes a holder provided at a lower end side, and the photocatalytic member is inserted and fixed into the holder.

12. The portable air purifier according to claim 10, wherein: The central pillar has a prism shape having a plurality of lateral surfaces, and the lateral surfaces of the central pillar are arranged to face the photocatalytic members, respectively.

13. The portable air purifier according to claim 2, wherein: The fan is disposed above the photocatalytic member.

14. The portable air purifier according to claim 2, wherein: The purification module further includes a main circuit board, and the main circuit board is disposed at a lower side of the housing.

15. The portable air purifier according to claim 14, wherein: The center post is a circuit board having a lower end connected to the main circuit board.

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