KR20160001542A - Air purifier - Google Patents

Abstract

The present invention relates to an air purifier. According to an embodiment of the present invention, the air purifier comprises: a housing where an air inlet and an air outlet are formed, and an internal space thereof is divided into a lower space and an upper space; a first filtration part installed in the lower space and filtering out air introduced from the air inlet; a light-emitting diode part installed in the upper space and offering ultraviolet light; a heat sink installed near the light-emitting diode part so as to emit heat dissipated from the light-emitting diode part to the outside; a second filtration part carrying out a photocatalytic reaction by means of ultraviolet light provided from the light-emitting diode part; and a fan part installed in the upper part of the second filtration part and blowing air introduced into the lower space out to the upper space.

Description

{AIR PURIFIER}

The present disclosure relates to an air cleaner, and more particularly, to an air cleaner that eliminates heat dissipation of an LED (Light Emitting Diode) emitting ultraviolet rays and performs sterilization and deodorization.

As the pollution of the atmospheric environment has become serious due to industrialization, the use of air purifiers for keeping indoor air clean is increasing rapidly.

This air purifier purifies polluted air and converts it into fresh air. It sucks the polluted air from the outside into the inside as a fan, separates fine dust or bacterium while passing through the built-in filter, It releases.

In recent years, attempts have been made to apply LEDs that emit ultraviolet rays to air purifiers for sterilization and cleaning. On the other hand, as the space required for air cleaning in the room is widened, the size of the air cleaner becomes larger, and the amount of electric power of the LED which generates the sterilizing effect is increased. Therefore, the amount of power dissipated from the LED is increased. As a result, the amount of heat emitted from the LED can also be increased. Therefore, in the industry, there is a continuing need for an air cleaner having sterilization and deodorization efficiency while solving the heat dissipation problem for stable driving of the LED.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2008-0008501 (published on Jan. 21, 2008, entitled Air Purifier).

The present disclosure aims to provide an air purifier capable of eliminating heat radiation of an LED that emits ultraviolet rays and efficiently performing sterilization and deodorization.

According to an aspect of the present disclosure, there is provided an air conditioner comprising: a housing having an air inlet and an air outlet formed therein, the inner space being divided into a lower space and an upper space; A first filter installed in the lower space for filtering the air introduced through the air inlet; A light emitting diode unit installed in the upper space and providing ultraviolet rays; A heat sink installed at a position adjacent to the light emitting diode and emitting heat radiated from the light emitting diode to the outside; A second filtering unit for performing a photocatalytic reaction with ultraviolet rays provided by the light emitting diode unit; And a fan unit installed at an upper portion of the second filtering unit and blowing air introduced into the lower space toward the upper space side.

By applying the air purifier according to the embodiment of the present disclosure, the sterilizing action and the deodorizing action through the light emitting diode that emits ultraviolet rays can be efficiently performed.

In an embodiment of the present disclosure, the heat emitted from the light emitting diode can be effectively dissipated through the heat sink.

In the embodiment of the present disclosure, the ultraviolet light emitting diode applied for the sterilization and deodorizing function is advantageous in that it can be downsized and has excellent durability as compared with the ultraviolet lamp using the conventional thermoelectric and luminescent materials. In addition, there is an advantage that the lifetime of the light emitting diode is long.

1 is a perspective view schematically showing an air purifier according to an embodiment of the present disclosure;
2 is a cross-sectional view schematically showing an air purifier according to an embodiment of the present disclosure;
3 is a perspective view schematically showing a heat sink and a light emitting diode according to an embodiment of the present disclosure;
4 is a cross-sectional view schematically illustrating an air flow of an air cleaner according to an embodiment of the present disclosure;

Embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. However, the techniques disclosed in this disclosure are not limited to the embodiments described herein but may be embodied in other forms. In the drawings, the width, thickness, and the like of the components are enlarged in order to clearly illustrate the components of each device.

Where an element is referred to herein as being located on another element "above" or "below", it is to be understood that the element is directly on the other element "above" or "below" It means that it can be intervened. In this specification, the terms 'upper' and 'lower' are relative concepts set at the observer's viewpoint. When the viewer's viewpoint is changed, 'upper' may mean 'lower', and 'lower' It may mean.

Like numbers refer to like elements throughout the several views. It is to be understood that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise, and the terms "comprise" Or combinations thereof, and does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Figure 1 is a perspective view schematically illustrating an air purifier according to one embodiment of the present disclosure, Figure 2 is a cross-sectional view schematically illustrating an air purifier according to one embodiment of the present disclosure, and Figure 3 is a cross- FIG. 4 is a cross-sectional view schematically showing an air flow of an air cleaner according to an embodiment of the present disclosure; FIG. 4 is a perspective view schematically showing a heat sink and a light emitting diode according to an embodiment of the present invention;

1 and 2, an air purifier according to an embodiment of the present disclosure includes a housing 10, a first filtering portion 20, a light emitting diode portion 30, a heat sink 40, (50), and a pan section (60).

The housing 10 is a case having an internal space of a predetermined size and has an air inlet 11 and an air outlet 12 formed therein. The air introduced from the air inlet 11 is converted into a flow inside the housing 10, sterilized and deodorized, and is discharged through the air outlet 12 in a purified state.

The housing 10 includes a lower space 13 adjacent to the air inlet 11 and an upper space 14 adjacent to the air outlet 12. The lower space 13 forms the lower part of the housing 10, and the first filtering part 20 is installed in the lower space 13. The upper space 14 forms the upper part of the housing 10 and is provided with a light emitting diode 30, a heat sink 40, a second filtering part 50 and a pan part 60.

The lower space 13 has a plurality of holes formed in a lower side wall of the housing 10 so that the air in the room flows into the housing 10 through the air inlet 11. The lower space 13 may have a plurality of side walls on the outer side. The side walls may be treated with a curved surface to reduce air resistance. As an example, the side walls may be hemispherical. In the lower portion of the housing 10, a moving wheel may be installed at four corners so as to support and move the entire air cleaner of the present invention.

The housing 10 is provided with a guide plate 15 which is divided into an upper space 14 and a lower space 13. The center of the guide plate 15 is fixed to the inner side surface of the housing 10 so that the air introduced through the air inlet 11 by the guide plate 15 directly rises to the upper portion of the housing 10 And guides the air through the first filtration part (20).

The first filtration unit 20 is installed in the lower space 13 and primarily filters the air introduced through the air inlet 11. [ The first filter portion 20 is cylindrical and includes a carbon filter 21 and a HEPA filter 22.

The carbon filter 21 includes activated carbon and a catalyst so that the organic chemicals in the air are filtered while passing through the carbon filter 21. Thereby, the carbon filter 21 performs a deodorizing action on the air introduced through the air inlet 11. In this embodiment, the carbon filter 21 may be combined with a photocatalytic filter and a light emitting diode for photocatalysis to increase the deodorization efficiency of the air purifier.

The HEPA filter (22) is installed inside the carbon filter (21) and removes fine dust in the room air passed through the carbon filter (21).

Although the carbon filter 21 and the HEPA filter 22 are described as the constitution of the first filtering section 20 in the above embodiment, the present invention is not limited to this, and various kinds of known functional filters may be used. 1 filter unit 20 can be constituted.

The light emitting diode unit 30 is installed in the upper space 14 and emits ultraviolet rays to provide ultraviolet rays to the second filtering unit 50. The light emitting diode unit 30 may include a light emitting diode for photocatalyst acting on the second filtering unit 50 including a photocatalytic filter and a sterilizing light emitting diode for removing bacteria. The light emitting diode for photocatalyst can emit ultraviolet rays of about 300 to 400 nm and the light emitting diode for sterilizing can emit ultraviolet rays of about 200 to 300 nm.

Referring to FIG. 3, the light emitting diode 30 is mounted on a support member 41 which is formed in a cruciform shape at the center of the heat sink 40. The light emitting diode portion 30 is arranged to emit ultraviolet rays in substantially the same direction as the flow of air flowing from the air inlet 11 to the air outlet 12. In one embodiment, the light emitting diode portion 30 is installed facing the second filtering portion 50. The light-emitting diode unit 30 can be selectively turned on and emit light under the control of a controller (not shown). Unlike what is shown, in some embodiments, the support member 41 is not only cross-shaped but also various variations are possible. That is, the support member 41 has a ventilation hole for smoothly flowing air from the air inlet 11 to the air outlet 12, an area of the light emitting diode 30 mounted on the printed circuit board 35 Or the light-emitting diode portion 30 can have various shapes and forms as long as the condition that the light-emitting diode portion 30 can uniformly irradiate the ultraviolet rays to the second filter portion 50 is satisfied.

The light emitting diode unit 30 may include at least one chip on board (COB) type light emitting diode chip or at least one light emitting diode package mounted on the printed circuit board 35. The light emitting diode section 30 may be manufactured to consume less than about 1000 mW of power. As shown in FIG. 3, a chip on board (COB) type light emitting diode chip or a light emitting diode package may be arranged in a plurality of rows on a printed circuit board 35. In addition, the light emitting diode chip or light emitting diode package may be arranged on the printed circuit board 35, but it is not limited thereto and may be arranged in various other forms on the printed circuit board 35.

The heat sink 40 is disposed at a position adjacent to the light emitting diode unit 30 to discharge the heat emitted from the light emitting diode unit 30 to the outside. 3 shows an example in which the light emitting diode 30 is provided on the support member 41 formed at the center of the heat sink 40. [ The heat sink 40 includes a support member 41, a heat dissipation fin 42, and an annular member 43. A plurality of radiating fins 42 are provided on the surface of the annular member 43 and a plurality of radiating fins 42 are provided on the surface of the annular member 43. The annular member 43 has a central portion, (41) is formed in a cross shape (+). A plurality of heat dissipation fins (42) are provided on the annular member (43) along the circumferential direction so that the heat emitted from the light emitting diode (30) cools the air sucked in the air inlet (11). The heat radiation of the air-cooled light emitting diode unit 30 in the radiating fin 42 is released to the outside through the air outlet 12. The radiating fins (42) are installed so as to face the air outlet (12). In one embodiment, the heat sink 40 can be manufactured by integrally forming the support member 41, the radiating fin 42, and the annular member 43. In another embodiment, the heat sink 40 can be manufactured by assembling the support member 41, the radiating fin 42, and the annular member 43 separately after they are assembled.

The light emitting diode portion 30 is disposed on the support member 41 of the heat sink 40 and the heat dissipation fin 42 of the heat sink 40 surrounds the side surface of the light emitting diode portion 30. In this embodiment, , And on the annular member (43). Specifically, when the heat sink 40 has upper and lower surfaces, the light emitting diode 30 and the heat radiating fins 42 may be disposed adjacent to each other on the upper surface of the heat sink 40. Specifically, the light emitting diode 30 may be disposed on the upper surface of the support member 41 to emit light in the upward direction, and the heat dissipation fin 42 may be disposed to protrude upward from the upper surface of the annular member 43 .

The second filtration unit 50 includes a photocatalytic filter including a photocatalytic medium that performs a photocatalytic reaction with ultraviolet rays provided by the light emitting diode unit 30. The second filtration portion 50 may include titanium oxide (TiO2), zinc oxide (ZnO), tungsten oxide (WO3), or zirconium oxide (ZrO2). The second filter portion 50 may be formed in a layered structure including titanium oxide (TiO2). The second filtration part 50 may be made of a layer coated with a material capable of flowing air, such as a metal foam or a porous metal material. The diameter of the second filtration portion 50 may be substantially the same as the inner diameter of the annular member 43, that is, the length of the support member 41. Thereby, air flowing through the annular member 43 can be brought into contact with the second filtration portion 50.

The second filtering unit 50 performs a photocatalytic reaction with ultraviolet rays of about 300 to 400 nm emitted from the light emitting diode unit 30 for photocatalysis. When the ultraviolet ray emitted from the light emitting diode 30 is absorbed, electrons (e) and holes (+) are generated on the surface of the second filter part 50 and electrons react with oxygen on the surface of the photocatalyst medium, (O2 < - >). Also, the hole reacts with water present in the air to generate a hydroxy radical (OH-), and the generated hydroxy radical can oxidatively decompose organic materials. Thus, pollutants and odorous substances in the air introduced into the air cleaner can be decomposed into water and carbon dioxide. In this way, the second filtration part 50 can cooperate with the light emitting diode part 30 to perform a deodorizing action on the introduced air.

The pan portion 60 is installed on the upper portion of the second filtration portion 50 and allows the air introduced into the lower space 13 to be blown into the upper space 14 through the air inlet 11. The air in the lower space 13 through the operation of the pan portion 60 passes through the first filtering portion 20 and flows through the light emitting diode portion 30 of the upper space 14, the heat sink 40, Sterilization and deodorization are carried out while passing through the filter 50.

The fan unit 60 includes a fan 61 and a fan motor 62. The fan 61 includes a plurality of blades installed facing the air outlet 12 and blowing the air introduced into the lower space 13 into the upper space 14. The fan motor 62 is a power source that is axially coupled to the fan 61 and rotates the fan 61 in an axial direction.

Referring to FIG. 4, the operation of the air purifier according to an embodiment of the present invention will be described.

The indoor air flows into the lower space (13) of the housing (10) through the air inlet (11). The air introduced into the lower space 13 is blown into the upper space 14 by the natural convection by the operation of the pan part 60 or by the forced convection by the operation of the pan part 60. At this time, the raised air is blocked by the guide plate 15 and flows into the first filtration part 20.

Air is firstly sterilized and deodorized while passing through the carbon filter 21 and the hepafilter (22) in the first filtration section 20.

The air that has been primarily filtered while passing through the first filtration unit 20 is transferred to the upper space 14 while being subjected to the photocatalytic reaction between the light emitting diode unit 30 and the second filtration unit 50, As the material breaks down, sterilization and deodorization occur secondarily.

At this time, the heat emitted from the light emitting diode unit 30 is air-cooled by the heat sink 40, and is moved upward by the operation of the pan unit 60. [ In this embodiment, the heat radiation fins 42 of the heat sink 40 are disposed adjacent to the light emitting diode portion 30 and can be disposed on the upper surface of the heat sink 40. [ The heat transferred from the light emitting diode portion 30 to the radiating fins 42 and discharged to the outside is absorbed by the air flowing through the annular member 43. In the case where the radiating fins 42 are disposed on the lower surface of the heat sink 40, It is prevented from being transmitted to the light emitting diode unit 30 again, so that heat radiation efficiency can be improved.

The air filtered by the second filtering unit 50 and the air cooled by the heat sink 40 are discharged to the outside of the air cleaner toward the air outlet 12 by the operation of the pan unit 60, Thereby providing purified air.

Although the embodiments of the present application as described above illustrate and describe the drawings, it is intended to illustrate what is being suggested in the present application and is not intended to limit what is presented in the present application in a detailed form. Various other modifications will be possible as long as the technical ideas presented in this application are reflected.

10: housing 11: air inlet
12: air outlet 13: lower space
14: upper space 15: guide plate
20: first filter section 21: carbon filter
22: HEPA filter 30: Light emitting diode part
35: printed circuit board 40: heat sink
41: support member 42:
43: annular member 50: second filtration part
60: Pan part 61: Fan
62: Fan motor

Claims (12)

A housing in which an air inlet and an air outlet are formed and the inner space is divided into a lower space and an upper space;
A first filter installed in the lower space for filtering the air introduced through the air inlet;
A light emitting diode unit installed in the upper space and providing ultraviolet rays;
A heat sink provided at a position adjacent to the light emitting diode and emitting heat radiated from the light emitting diode to the outside;
A second filtering unit for performing a photocatalytic reaction with ultraviolet rays provided by the light emitting diode unit; And
A fan part installed on the second filtration part and blowing the air introduced into the lower space toward the upper space side;
And an air purifier.
The method according to claim 1,
In the housing,
And a guide plate for separating the lower space and the upper space from each other and guiding the air flowing through the air inlet to pass through the first filtration unit.
The method according to claim 1,
Wherein the first filter includes a carbon filter.
The method of claim 3,
Wherein the first filter unit further comprises a HEPA filter.
The method according to claim 1,
Wherein the light emitting diode unit emits ultraviolet rays of 300 to 400 nm towards the second filter unit.
The method according to claim 1,
Wherein the light emitting diode unit emits ultraviolet rays in the same direction as the flow of air flowing from the air inlet to the air outlet.
The method according to claim 1,
Wherein the light emitting diode unit is installed on a support member provided inside the heat sink.
8. The method of claim 7,
Wherein the support member is formed in a cross shape inside the heat sink.
The method according to claim 1,
Wherein the heat sink is formed with a plurality of radiating fins facing the air outlet.
10. The method of claim 9,
Wherein the light emitting diode portion is disposed on an upper surface of the support member of the heat sink,
And the radiating fins are disposed so as to protrude from the upper surface of the annular member of the heat sink so as to surround the light emitting diode portion.
The method according to claim 1,
And the second filter portion comprises a substance that provides a photocatalytic reaction.
The method according to claim 1,
The fan unit includes:
A fan for directing the air sucked in the lower space to the upper space side toward the air discharge port; And
A fan motor for rotating the fan;
And an air purifier.

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