Organic suspended matter detecting apparatus

Abstract

The present invention relates to an organic suspended matter detecting apparatus and, more specifically, to an organic suspended matter detecting apparatus capable of detecting organic suspended matter in a fluid by sensing excitation light from the organic suspended matter in the fluid. Disclosed is an organic suspended matter detecting apparatus for detecting organic suspended matter in a fluid, the organic suspended matter detecting apparatus comprising: a chamber forming a path through which a fluid flows, and having a light irradiation region, which is irradiated with light, on an inner wall; a light source unit for irradiating the light irradiation region with light; and a photo sensor unit for detecting light inside the chamber, wherein the chamber includes an opening through which the fluid flows in or out of the inner space of the chamber.

Description

Organic matter detection device

[0001] The present invention relates to an organic floating matter detection device, and more specifically, to an organic floating matter detection device capable of detecting organic floating matter in a fluid by sensing excitation light of the organic floating matter in the fluid.

[0002] Indoor and outdoor air contains microscopic organic particles such as bacteria, mold, and viruses. Exposure to air containing large amounts of these microscopic particles can cause ailments such as headaches, dizziness, and allergies. Therefore, technologies for detecting and managing airborne microscopic organic particles are needed.

[0003] When light of a specific wavelength is irradiated on fine organic matter contained in the air, the fine organic matter absorbs the light and emits excited light, and by detecting the excited light, the presence or absence of fine organic matter in the air or the level of contamination can be detected.

[0004] However, there is a problem in that the light irradiated on the fine organic matter acts as noise and the excitation light of the fine organic matter is weak, which reduces the accuracy of excitation light detection and causes errors in the measured values.

[0005] The purpose of the present invention is to provide an organic matter detection device capable of accurately detecting the presence or amount of organic matter in a fluid.

[0006] One embodiment of the present invention discloses an organic floating matter detection device, comprising: a chamber having a light irradiation area where light is irradiated to an inner wall and forming a path for a fluid to move; a first conductive semiconductor layer; a second conductive semiconductor layer; and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, and including a light source unit for irradiating light to the light irradiation area; and a light sensor unit for detecting light within the chamber, wherein the chamber includes an opening for introducing or discharging the fluid into an internal space of the chamber, and the light sensor unit detects organic floating matters within the fluid introduced into the internal space of the chamber.

[0007] In one embodiment, the optical axis of the light emitted from the light source unit and the inner wall of the chamber in which the light irradiation area is formed may form an acute angle.

[0008] In one embodiment, the angle formed by the optical axis and the inner wall of the chamber in which the light irradiation area is formed may be between 10º and 20º.

[0009] In one embodiment, the peak wavelength of light emitted from the light source unit may be between 350 nm and 400 nm.

[0010] In one embodiment, the optical sensor unit can detect excitation light caused by the organic floating material.

[0011] In one embodiment, the divergence angle of the light source may be 60º or less.

[0012] In one embodiment, the light sensor unit may be installed adjacent to the opening.

[0013] In one embodiment, the light source unit may include a light emitting element and a base supporting the light emitting element.

[0014] In one embodiment, the light source unit may further include a lens disposed above the light emitting element.

[0015] In one embodiment, the light source unit may further include a substrate forming a concave cavity in which the light emitting element is mounted.

[0016] In one embodiment, the side of the cavity may be a sloped reflective surface.

[0017] In one embodiment, the light source unit may further include a reflective side wall unit surrounding the side of the lens and reflecting light emitted from the lens.

[0018] In one embodiment, the light source unit may further include at least one optical element that focuses light emitted from the lens.

[0019] In one embodiment, the light source unit may further include an optical filter unit that is disposed above the lens and transmits light of a specific wavelength.

[0020] In one embodiment, the internal space of the chamber can be partitioned into a first internal space and a second internal space by the base.

[0021] In one embodiment, a passage may be formed in the base to connect the first internal space and the second internal space.

[0022] In one embodiment, the light source unit may be installed on one side of the base facing the second internal space.

[0023] In one embodiment, the opening may be connected to the first internal space.

[0024] In one embodiment, the chamber may further include a reflective layer coated on the inner wall.

[0025] In one embodiment, the light sensor unit is installed on the first internal space side and can detect reflected light reflected from the second internal space side toward the first internal space side.

[0026] In one embodiment, the organic matter detection device may further include an optical filter that reflects some of the light within the chamber and transmits some of the light depending on the wavelength.

[0027] In one embodiment, the optical sensor unit may include a first optical sensor unit that detects reflected light reflected from the optical filter and a second optical sensor unit that detects transmitted light passing through the optical filter.

[0028] In one embodiment, the light emission pattern of light emitted from the light source unit may have a first peak and a second peak.

[0029] One embodiment of the present invention discloses an organic floating matter detection device, comprising: a chamber having a light irradiation area where light is irradiated to an inner wall and forming a path for a fluid to move; a first conductive semiconductor layer; a second conductive semiconductor layer; and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, a light source unit for irradiating light to the light irradiation area; and a light sensor unit for detecting light within the chamber, wherein a divergence angle of the light source unit is 60° or less, and the light sensor unit detects organic floating matters within a fluid that has flowed into an internal space of the chamber.

[0030] One embodiment of the present invention discloses a floating matter detection device, comprising: a chamber having a light irradiation area where light is irradiated to an inner wall and forming a path for a fluid to move; a first conductive semiconductor layer; a second conductive semiconductor layer; and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, a light source unit for irradiating light to the light irradiation area; and a light sensor unit for detecting light within the chamber, wherein a wavelength difference between a peak wavelength of light emitted from the light source unit and a peak wavelength of light detected by the light sensor unit is 50 nm or more, and the light sensor unit detects organic floating matters within a fluid that has flowed into an internal space of the chamber.

[0031] Embodiments of the present invention can provide an organic matter detection device capable of detecting the presence or amount of organic matter in a fluid to be analyzed.

[0032] Embodiments of the present invention optimize the structure of the internal space of a chamber that accommodates a fluid, thereby ensuring sufficient time for the fluid to be analyzed to remain within the chamber, thereby stably detecting organic floating matters within the fluid to be analyzed and improving measurement accuracy.

[0033] Embodiments of the present invention can increase light output by improving the brightness of a light source unit, thereby enabling accurate capture of even minute optical signals caused by organic floating substances.

[0034] Embodiments of the present invention can improve light collection efficiency by concentrating light from a light source unit onto a light irradiation area, and efficiently detect reflected or scattered light signals from the light irradiation area.

[0035] Embodiments of the present invention can increase power efficiency and optical efficiency compared to existing ones by using a light source that emits light of a wavelength optimized for measuring microorganisms or bioparticles.

[0036] Embodiments of the present invention can minimize noise in the light sensor unit by preventing light emitted from the light source unit from being directly irradiated to the light sensor unit.

[0037] Embodiments of the present invention can improve the reliability of a floating object detector by allowing light scattered or scattered by particles contained in a fluid to be analyzed to be incident on a light sensor unit.

[0038] Figure 1 is a schematic diagram showing an organic floating matter detection device according to one embodiment of the present invention.

[0039] Figure 2 is a schematic diagram showing an organic floating matter detection device according to another embodiment of the present invention.

[0040] Figure 3 is a schematic diagram showing an organic floating matter detection device according to another embodiment of the present invention.

[0041] Fig. 4 is a graph showing an example of the intensity of light according to the central angle with respect to the optical axis in the light source unit of the organic floating matter detection device of the present invention.

[0042] Fig. 5 is a graph showing another example of the intensity of light according to the central angle with respect to the optical axis in the light source unit of the organic floating matter detection device of the present invention.

[0043] Figure 6 is a drawing showing the light emission pattern of light emitted from a light source unit in an organic floating matter detection device of the present invention.

[0044] FIGS. 7A to 7C are a plan view, a bottom view, and a side view showing an example of a light source unit of an organic floating matter detection device of the present invention.

[0045] Fig. 8 is a modified example of Fig. 7c.

[0046] Figures 9 to 13 are cross-sectional views showing other examples of the light source unit of the organic floating matter detection device of the present invention.

[0047] Figures 14a and 14b are top and bottom views showing a part of the configuration of the organic floating matter detection device of the present invention.

[0048] Figure 15 is a cross-sectional view showing an enlarged view of the Ⅰ-Ⅰ' direction cross-section of Figure 14b.

[0049] In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of various embodiments or implementations of the present disclosure. As used herein, the terms "embodiment" and "implementation" are interchangeable to refer to non-limiting examples of devices or methods that utilize one or more of the inventive concepts disclosed herein. However, it will be apparent that various embodiments may be practiced without utilizing these specific details or using one or more equivalent arrangements. In other instances, well-known structures and devices are shown in block diagram form to avoid unnecessarily obscuring the various embodiments. Furthermore, while the various embodiments may vary from one another, they are not necessarily exclusive. For example, specific features, configurations, and characteristics of an embodiment may be utilized or implemented in other embodiments without departing from the scope of the inventive concepts.

[0050] Unless otherwise specified, the illustrated embodiments should be understood to provide exemplary features of varying details of some ways in which the concepts of the present invention may be practically implemented. Therefore, unless otherwise specified, the features, components, modules, layers, membranes, panels, regions, and / or aspects (hereinafter, individually or collectively referred to as "elements") of the various embodiments may be differently combined, separated, interchanged, and / or rearranged without departing from the scope of the concepts of the present invention.

[0051] The use of cross-hatching and / or shading in the accompanying drawings is generally provided to clarify boundaries between adjacent elements. As such, the presence or absence of cross-hatching or shading, unless expressly stated, does not imply or indicate any preference or requirement for any particular material, material properties, dimensions, proportions, commonality between the illustrated elements, and / or any other features, properties, or characteristics of the elements. Furthermore, in the accompanying drawings, the dimensions and relative sizes of elements may be exaggerated for clarity and / or illustrative purposes. When embodiments are implemented differently, certain process sequences may be performed differently from the illustrated sequence. For example, two consecutively illustrated processes may be performed substantially simultaneously or in a reverse order from the illustrated sequence. Furthermore, like reference numerals designate like elements.

[0052] When an element, such as a layer, is referred to as being "on," "connected to," or "joined to" another element or layer, the element may be directly on, connected to, or joined to the other element or layer, or there may be intervening elements or layers present. However, when an element or layer is referred to as being "directly on," "directly connected to," or "directly joined to" another element or layer, there are no intervening elements or layers present. For this purpose, the term "connected" may refer to physical, electrical, and / or fluidic connections, with or without intervening elements. Furthermore, the DR1-axis, DR2-axis, and DR3-axis are not limited to the three axes of a Cartesian coordinate system, such as the x, y, and z-axes, and may be interpreted in a broader sense. For example, the DR1-axis, DR2-axis, and DR3-axis may be perpendicular to one another, or may represent different directions that are not perpendicular to one another. For purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0053] Although the terms "first," "second," and the like may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, the first element discussed below may be referred to as the second element without departing from the teachings of the present disclosure.

[0054] Spatially relative terms such as "beneath," "beneath," "directly beneath," "lower," "above," "upper," "above," "higher than," "side" (as in, for example, a "side wall"), and the like may be used for descriptive purposes and thereby to describe the relationship of one element to other element(s) as depicted in the drawings. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientations depicted in the drawings. For example, if the device in the drawings were turned over, an element described as "beneath" or "beneath" another element or feature would then be oriented "above" the other element or feature. Therefore, the exemplary term "beneath" can encompass both orientations above and below. Furthermore, the device can be oriented differently (e.g., rotated 90° or oriented in other orientations), and thus the spatially relative descriptors used herein can also be interpreted accordingly.

[0055] The terminology used herein is for the purpose of describing particular embodiments and is not limiting. The singular forms "a," "an," and "the" as used herein also include the plural forms unless the context clearly dictates otherwise. Furthermore, the terms "comprises," "comprising," "includes," and / or "comprising" as used herein specify the presence of stated features, integers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Furthermore, the terms "substantially," "about," and other similar terms as used herein are used as terms of approximation rather than degrees, and as such, are used to describe inherent deviations from measured, calculated, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0056] Various embodiments are described below with reference to cross-sectional and / or exploded illustrations, which are schematic illustrations of idealized embodiments and / or intermediate structures. As such, variations from the shapes of the illustrated drawings may be expected, for example, as a result of manufacturing techniques and / or tolerances. Therefore, the embodiments disclosed herein should not necessarily be construed as limited to the shapes of specific illustrated regions, but should be construed to include, for example, deviations in shape resulting from manufacturing. In this way, the regions depicted in the drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of regions of the device, and as such, are not necessarily intended to have a limiting meaning.

[0057] As is conventional in the art, some embodiments may be illustrated and described in the accompanying drawings in terms of functional blocks, units, and / or modules. Those skilled in the art will appreciate that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuits such as logic circuits, discrete components, microprocessors, wiring circuits, memory elements, and wiring connections formed using semiconductor-based or other manufacturing techniques. When the blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they may be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and optionally, may be driven by firmware and / or software. Furthermore, each block, unit, and / or module may be implemented by dedicated hardware, or by a combination of dedicated hardware for performing some functions and processors (e.g., one or more programmed processors and associated circuitry) for performing other functions. Additionally, the blocks, units, and / or modules of some embodiments may be physically separated into two or more interacting and individual blocks, units, and / or modules without departing from the scope of the present invention. Additionally, the blocks, units, and / or modules of some embodiments may be physically combined into more complex blocks, units, and / or modules without departing from the scope of the present invention.

[0058] Unless otherwise defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries, such as terms defined in commonly used dictionaries, should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealistic or overly formal sense unless explicitly defined herein.

[0059] The present invention discloses an organic matter detection device for detecting organic matter in a fluid. Organic matter refers to one of the contaminants contained in a fluid, such as air, and may refer to microorganisms, bacteria, etc. attached to dust or water vapor. These organic matter can affect the human respiratory system and cause pathogenic infections.

[0060] As an example, FIG. 1 illustrates an organic floating matter detection device (100) according to one embodiment of the present invention.

[0061] The above organic floating matter detection device (100) may include a chamber (110) having a light irradiation area (A) on which light is irradiated to an inner wall (IS) and which forms a path through which a fluid moves, a light source unit (120) for irradiating light to the light irradiation area (A), and a light sensor unit (130) for detecting light within the chamber (110).

[0062] In Fig. 1, the chamber (110) is configured to provide a path for fluid movement by being surrounded by the plurality of wall portions (112, 114, 116), and various configurations are possible. The chamber (110) may be formed in a hexahedral shape, for example, but is not limited thereto, and may be formed in various shapes such as a tubular shape, a cylindrical shape, a cylinder shape, a cone shape, a sphere shape, a rectangular parallelepiped shape, a pyramid shape, an ellipsoid shape, a polyhedron shape, a container shape, or an irregular shape. That is, the shape of the chamber (110) is not limited to a specific form, and may be formed in any shape in which a fluid can stay or be accommodated therein.

[0063] In addition, a reflective material for reflecting light may be disposed in at least one area of ​​the chamber (110). For example, the reflective material may be a reflective layer disposed on the inner wall (IS) of the chamber (110). The reflective layer may include a metal reflective material such as aluminum or silver. In addition, the reflective layer may include a metal oxide such as titanium dioxide (TiO2), but is not limited thereto, and may include other oxides having excellent light reflectivity, for example, aluminum oxide (Al2O3), silicon oxide (SiO2), zirconium oxide (ZrO2), hafnium oxide (HfO2), magnesium oxide (MgO), lanthanum oxide (La2O3), or a combination thereof. The reflective layer may improve light irradiation efficiency by reflecting and focusing light emitted through the light source unit (120) onto a specific target area, thereby contributing to improving light response or detection sensitivity.

[0064] In addition, the chamber (110) may have a path formed within it through which a fluid flows, and a curved surface may be formed on the inner surface of the chamber (110). The curved surface may be formed along the path through which the fluid flows, and the curvature of the curved surface may vary depending on the section or area through which the fluid flows. The curved surface on the inner surface of the chamber may generate a vortex, thereby increasing the time that the fluid remains within the chamber, thereby improving the accuracy of detecting organic floating matter.

[0065] The above chamber (110) may also be accommodated by a separate external housing.

[0066] The above chamber (110) may have a light irradiation area (A) where light is irradiated to the inner wall (IS).

[0067] The above light irradiation area (A) may correspond to a stagnation zone where the fluid moving inside the chamber (110) decelerates and stagnates. The light irradiation area (A) may be defined as an area of ​​the inner surface of the wall portions (112, 114, 116) constituting the chamber (110) to which light is irradiated. The size of the area of ​​the light irradiation area (A) may be implemented in various ways.

[0068] The stagnation zone may be a zone in which the fluid's speed is reduced and it moves slowly while moving inside the chamber (110). In the stagnation zone, a vortex of the fluid may be formed, and the vortex may impede the movement of the fluid, causing the fluid to stagnate.

[0069] In addition, the light irradiation area (A) may be a section where the direction of movement of the fluid changes. For example, when a fluid moving inside a chamber (110) collides with a wall (112, 114, 116) in the light irradiation area (A), the direction of movement changes, thereby forming a section where the flow rate decreases and stagnation occurs, and the section may be set as the light irradiation area (A).

[0070] The above light irradiation area (A) can be positioned apart from the light sensor unit (130). This prevents the light emitted from the light source unit (120) from being directly irradiated to the light sensor unit (130), and allows the light emitted from the light source unit (120) to be excited by particles contained in the fluid and scattered or reflected to enter the light sensor unit (130), thereby improving the reliability of the floating object detection device (100).

[0071] At this time, in order to further improve the detection accuracy, a light-absorbing layer containing a light-absorbing material may be included in one area of ​​the light irradiation area (A). The light-absorbing layer may include a light-absorbing material such as carbon black, amorphous silicon (a-Si), copper dioxide (CuO), iron oxide (Fe3O4), transition metal chalcogenide (MoS2, WS2), organic dye, or perovskite to effectively absorb light incident from the light source unit (120). The selection of the light-absorbing material may be variously adjusted depending on the wavelength band and analysis purpose, depending on the light received by the light sensor unit (130) or the excitation wavelength of the organic material to be detected.

[0072] Meanwhile, the chamber (110) may include an opening (110a, 110b) for introducing or discharging a fluid into or out of the internal space of the chamber. The opening may be an inlet for introducing a fluid into the chamber, an outlet for discharging a fluid, or an inlet and outlet for introducing and discharging a fluid. The opening (110a, 110b) may be formed in a wall portion (112, 114, 116) of the chamber (110). The chamber (110) may be provided with a plurality of openings (110a, 110b) for smooth inflow and outflow of the fluid.

[0073] The above openings (110a, 110b) may be formed on the same wall portion as the wall portion where the light irradiation area (A) is formed, or may be formed on a wall portion different from the wall portion where the light irradiation area (A) is formed.

[0074] When the inner wall of the chamber (110) where the light irradiation area (A) is formed is referred to as the first wall portion (112), FIG. 1 illustrates an example in which the openings (110a, 110b) are formed not in the first wall portion (112) but in a second wall portion (114) different from it. If the openings (110a, 110b) are formed not in the first wall portion (112) where the light irradiation area (A) is formed but in a second wall portion (114) different from it, the time that the fluid remains in the chamber (110) in the light irradiation area (A) can be increased, thereby improving the accuracy of detecting organic floating matters. Alternatively, an example in which the openings (110a, 110b) are formed in the first wall portion (112) is also possible. When the above openings (110a, 110b) are formed in the first wall portion (112), the openings (110a, 110b) can be arranged spaced apart from the light irradiation area (A). This can improve the reliability of the organic floating matter detection device (100) by preventing the light emitted from the light source portion (120) from being directly irradiated to the light sensor portion (130).

[0075] Specifically, the chamber (110) may have a first opening (110a) formed in a second wall portion (114) facing the first wall portion (112) for the inflow and outflow of fluid. In this case, the fluid flowing in through the first opening (110a) may move toward the light irradiation area (A). The inflow or outflow of fluid may occur through the first opening (110a).

[0076] Alternatively, additionally, the chamber (110) may further include a second opening (110b) as an additional opening in addition to the first opening (110a). For example, the chamber (110) may have a second opening (110b) formed in the second wall portion (114) and spaced apart from the first opening (110a) for fluid inflow and outflow. This may increase the retention time of the fluid within the chamber (110), thereby improving the accuracy of floating object detection.

[0077] The position of the second opening (110b) is not limited thereto, and may be formed in various positions in consideration of the path of the fluid flowing inside the chamber (110). For example, the second opening (110b) may be formed in a side wall other than the second wall portion (114). When the second opening (110b) is formed in a side wall other than the second wall portion (114), the first opening (110a) and the second opening (110b) may be positioned so as not to overlap each other in a vertical cross-section of the side wall. This can increase the retention time of the fluid inside the chamber (110), thereby improving the accuracy of detecting floating objects.

[0078] In addition, when the second opening (110b) is arranged to overlap in an area parallel to the second wall portion (114), it may be formed with a different area from the first opening (110a) to form a vortex so as to increase the fluid's residence time. By increasing the fluid's residence time, the accuracy of detecting organic floating matter can be increased.

[0079] The sizes of the above openings (110a, 110b) can be configured in various ways. In addition, the sizes of the first opening (110a) and the second opening (110b) can be configured to be different from each other. When the first opening (110a) and the second opening (110b) are formed to have different sizes, the movement speed of the fluid through the first opening (110a) and the second opening (110b) can be controlled, and the amount of fluid irradiated with light in the light irradiation area (A) can be increased, thereby improving the accuracy of detecting organic floating matters.

[0080] In Fig. 1, the arrow (K) illustrates the flow tendency of the fluid. The fluid introduced through the first opening (110a) may change direction and flow toward the second opening (110b) after reaching the light irradiation area (A) and may flow out. By slowing down the flow rate of the fluid in the light irradiation area (A), the accuracy of detecting organic floating matters can be improved. However, this is only one example of the flow tendency of the fluid, and the flow of the fluid is not fixed as shown by the arrow (K) in Fig. 1. Conversely, it is also possible for air introduced toward the second opening (110b) to flow out through the first opening (110a), and both the first and second openings (110a, 110b) may perform both the fluid introduction / discharge functions.

[0081] The chamber (110) may be installed on a path where a fluid flow is formed. For example, the chamber (110) may be installed in a space where a fluid flow is formed by a fan, such as an air purifier or air conditioner, thereby forming a natural fluid inflow / outflow path into the chamber (110) through the openings (110a, 110b). Through this, organic floating matter contained within the space where a fluid flow is formed may be detected.

[0082] The above light source unit (120) is configured to irradiate light to the light irradiation area (A), and can have various configurations.

[0083] For example, referring to FIGS. 7A to 7C, the light source unit (120) may include a light emitting element (122), a substrate (124) on which the light emitting element (122) is mounted, and a lens (126) above the light emitting element (122).

[0084] The above light-emitting element (122) is a light-emitting diode chip and may be a light source that generates light of a specific wavelength band capable of exciting organic floating matter.

[0085] The wavelength range including the peak wavelength and full width at half maximum (FWHM) of the wavelength of light generated from the above light-emitting element (122) and emitted through the light source unit (120) may be in a range including the absorption band of the organic suspension.

[0086] The light-emitting device (122) may include a semiconductor layer. The semiconductor layer may include a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer. The light-emitting device (122) may further include a growth substrate on which the semiconductor layer is disposed. The semiconductor layer may be grown on the growth substrate. The light-emitting device (122) may include a plurality of semiconductor layers. The semiconductor layers may be disposed spaced apart from each other on a plane or may be vertically stacked.

[0087] The growth substrate may be a growth substrate for growing a gallium nitride-based semiconductor layer, such as a sapphire substrate, a silicon substrate, a SiC substrate, a spinel substrate, a Ga2O3 substrate, etc. The growth substrate is not limited to a specific type as long as it is a substrate capable of growing a nitride-based semiconductor layer. The growth substrate may be removed after the semiconductor layer is grown.

[0088] The first conductive semiconductor layer may be a semiconductor layer grown on one surface of a growth substrate, and may include a phosphide or nitride semiconductor such as (Al, Ga, In)P or (Al, Ga, In)N. In addition, the first conductive semiconductor layer may be doped to be n-type by including one or more impurities such as Si, C, Ge, Sn, Te, Pb, etc. The present invention is not limited thereto, and as another example, the first conductive semiconductor layer may be doped to be of the opposite conductive type by including a p-type dopant. In addition, further, the first conductive semiconductor layer may be formed of a single layer or multiple layers.

[0089] The active layer is a light-emitting layer disposed on one side of the first conductive semiconductor layer, and may include a phosphide or nitride semiconductor such as (Al, Ga, In)P or (Al, Ga, In)N, and may be grown on the first conductive semiconductor layer using a technique such as MOCVD, MBE, or HVPE. In addition, the active layer may include a quantum well structure (QW) including at least two barrier layers and at least one well layer, and further may include a multiple quantum well structure (MQW) including a plurality of barrier layers and a plurality of well layers. The wavelength of light emitted from the active layer can be controlled by controlling the composition ratio of the material constituting the well layers. In this case, the well layers may commonly include the same element, and may include In, for example.

[0090] The second conductive semiconductor layer may be a semiconductor layer disposed on one side of the active layer. The second conductive semiconductor layer may include a phosphide-based or nitride-based semiconductor, such as (Al, Ga, In)P or (Al, Ga, In)N. The second conductive semiconductor layer may be doped with a conductive type opposite to that of the first conductive semiconductor layer. For example, the second conductive semiconductor layer may be doped to be p-type by including an impurity such as Mg.

[0091] The light emitting element (122) may have a light-emitting surface formed on the first conductive semiconductor layer or the second conductive semiconductor layer to emit light. For example, light generated in the active layer may be emitted to the outside through the first conductive semiconductor layer or through the second conductive semiconductor layer. A rough structure may be formed on one surface of the first conductive semiconductor layer or one surface of the second conductive semiconductor layer to increase light extraction efficiency.

[0092] For example, a light emitting element (122) that emits light having a peak wavelength in the range of 200 nm to 400 nm may be used to detect organic carbon. In addition, a light emitting element (122) that emits light having a peak wavelength in the range of 200 nm to 300 nm may be used as a light source to detect proteins such as bacteria. In addition, a light emitting element (122) that emits light having a peak wavelength in the range of 280 nm to 450 nm may be used as a light source to detect organic carbon. In addition, a light emitting element (122) that emits light having a peak wavelength in the range of 250 nm to 500 nm may be used as a light source to detect plant particles such as pollen. In addition, light emitting elements (122) having different wavelengths may be arranged together to detect complex floating matter. At this time, since the light emitting element (122) of a short wavelength has low light efficiency, the detection efficiency of organic floating matter per energy can be increased by using a light source having a wavelength of 350 nm to 450 nm considering the light emitting efficiency of the light emitting element (122).

[0093] Referring to FIGS. 7a to 7c, the light source unit (120) can constitute a light emitting device in which the light emitting element (122) is mounted on a substrate (124).

[0094] The above substrate (124) is a lead frame electrically connected to the negative electrode pad and positive electrode pad of the light emitting element (122), and a heat dissipation pad (124a) may be provided at the bottom.

[0095] A concave cavity (CV) in which the light-emitting element (122) is mounted may be formed on the upper surface of the substrate (124). The side surface of the cavity (CV) may be a reflective surface for reflecting light emitted from the light-emitting element (122) upward. The reflective surface may be an inclined surface. A reflective material having a different composition from the substrate (124) may be disposed on the reflective surface to increase light efficiency. The reflective material may include a metal material such as Au, Ag, Al, or a metal oxide such as alumina or titanium oxide. At this time, the reflective material may be selected according to the wavelength of the light-emitting element (122). For example, a material having a reflectivity of 60% or more at a wavelength of 350 nm to 450 nm may be selected as the reflective material to increase light efficiency. It is obvious that the cavity (CV) formed on the upper surface of the substrate (124) is not an essential component and may be omitted.

[0096] The above lens (126) is an optical element that is placed above the light emitting element (122) to control the optical path of light emitted from the light emitting element (122), and can be configured in various ways.

[0097] Light passing through the lens (126) can ultimately be emitted from the light source unit (120) and can be irradiated toward the light irradiation area (A) with a divergence angle. The lens (126) can adjust the divergence angle of the light toward the light irradiation area (A).

[0098] Figures 7a to 13 illustrate various shapes of the lens (126), and the lens (126) may be a hemispherical lens, a spherical ball lens, a semi-elliptical lens, or various other shapes. The lens (126) may be mounted on a substrate (124) or installed on a separate lens frame (125) on the upper side of the substrate (124).

[0099] If the lens (126) is a hemispherical lens, it may be configured with various curvatures depending on the design, as illustrated in FIGS. 7C and 8 . The lens (126) may have the greatest curvature in the region that overlaps vertically with the region where the light-emitting element (122) is arranged. In addition, the lens (126) may have a curvature greater in the region that overlaps vertically with the upper surface of the light-emitting element (122) than in other regions. Through this, the beam angle can be efficiently adjusted.

[0100] Through the light emitting element (122) and the lens (126), the divergence angle of the light source unit (120) can be implemented to be 60º or less. More preferably, the divergence angle of the light source unit (120) can be 30º or less.

[0101] If the divergence angle of the above light source (120) becomes greater than 60º, optical noise may occur due to the influence of light diverging at an angle greater than 60º, so appropriate processing of light diverging at an angle greater than 60º is required.

[0102] Fig. 4 illustrates the intensity of light emitted from the light source unit (120) according to the central angle with respect to the optical axis (L). By minimizing the point (half-width) at which the central intensity (I) of light emitted from the light source unit (120) becomes half, and by appropriately processing light emitted at an angle of 60º or more, optical noise can be minimized.

[0103] To this end, the light source unit (120) may further include a reflective side wall unit (129) that surrounds the side of the lens (126) and reflects light emitted from the lens (126), as shown in FIGS. 9 to 11.

[0104] The above reflective side wall portion (129) may have a reflective surface that reflects light emitted laterally from the lens (126) and focuses it toward the center. For example, the reflective side wall portion (129) may be composed of a metal material such as Al, Ag, Au, or an insulating material plated with a metal material to increase reflection efficiency. However, the reflective side wall portion (129) is not limited thereto, and as another example, the reflective side wall portion (129) may include particles with high reflectivity such as TiO2, BaSO4, or FET.

[0105] The above reflective side wall portion (129) can have a reflectivity of 60% or more at the peak wavelength of the light-emitting element (122). This can increase light efficiency.

[0106] In addition, the light source unit (120) may further include at least one optical member (128) that focuses light emitted from the lens (126), as illustrated in FIGS. 10 and 11. The optical member (128) may be installed in the above-described reflective side wall unit (129).

[0107] The optical member (128) may have a region having a curvature. The optical member (128) may overlap the light-emitting element (122) with its upper and lower surfaces. The optical member (128) may have different curvatures in the region overlapping the light-emitting element (122) with its upper and lower surfaces and in the outer region. In addition, the lens (126) may have a curvature greater in the region overlapping the optical member (128) with its upper and lower surfaces than in other regions. The curvature of the optical member (128) may be smaller than that of the lens (126). Through this, the divergence angle can be precisely adjusted.

[0108] In addition, the light source unit (120) may further include an optical filter unit (127) that is arranged above the lens (126) and transmits light of a specific wavelength, as illustrated in FIGS. 9 to 11. The optical filter unit (127) may be mounted on the upper side of the reflective side wall unit (129). The optical filter unit (127) may be a filter having high transmittance in light of a specific wavelength range. For example, the optical filter unit (127) may have a transmittance of 80% or more in a range of 350 nm to 380 nm. The optical filter unit (127) may be a bandpass filter. The above optical filter unit may include a thin film interference structure formed by alternately stacking high refractive index layers, such as TiO2, Ta2O5, ZrO2, etc., and low refractive index layers, such as SiO2, MgF2, AlF3, etc., to selectively pass only a specific ultraviolet wavelength band. Through this multilayer structure, high selectivity and wavelength precision in the ultraviolet region can be secured. In addition, the optical filter unit (127) may function as a protective member that protects the light emitting element (122) from external foreign substances.

[0109] The above reflective side wall portion (129), optical filter portion (127), and optical member (128) are optional components and are not necessarily included, and may be configured in various combinations depending on the embodiment.

[0110] Meanwhile, the light source unit (120) may be installed at various locations within the chamber (110). However, the light source unit (120) may be installed at a location and angle that can easily irradiate light within the light irradiation area (A).

[0111] Again in FIG. 1, the light source unit (120) may be installed on a wall unit (114, 116) other than the first wall unit (112) in which the light irradiation area (A) is provided. For example, the light source unit (120) may be installed on a third wall unit (116) adjacent to the first wall unit (112).

[0112] The optical axis (L) of the light emitted from the light source (120) and the inner wall (IS) of the chamber (110) where the light irradiation area (A) is formed can form an acute angle. That is, the optical axis (L) of the light emitted from the light source (120) and the first wall (112) can meet at an acute angle. That is, the optical axis (L) of the light emitted from the light source (120) is installed so as not to be irradiated perpendicularly to the plane of the first wall (112).

[0113] For example, the angle formed by the optical axis (L) and the inner wall (IS) of the chamber (110) in which the light irradiation area (A) is formed may be between 10º and 20º. That is, the acute angle (α) formed by the optical axis (L) and the first wall portion (112) may be within the range of 10º to 20º. More preferably, the acute angle (α) formed by the optical axis (L) and the first wall portion (112) may be 15º. This can expand the light irradiation area irradiated to the organic floating matter and increase the detection efficiency of the organic floating matter.

[0114] Since the above light irradiation area (A) is provided on the first wall portion (112) and the optical axis (L) is inclined at 15º and irradiated, the area on which the light emitted from the light source portion (120) is projected can be formed to an appropriate size. Due to the optical axis (L) being inclined with respect to the first wall portion (112), the light irradiation area (A) can be wider than the area of ​​the light emitting element (122) of the light source portion (120). The light irradiation area (A) can be 10 to 15 times the area of ​​the light emitting element (122). Through this, light can be irradiated to a wide area of ​​fluid to increase detection sensitivity.

[0115] In addition, since the light irradiation area (A) is provided on the first wall (112) and the light source (120) is installed on the third wall (116) adjacent to the first wall (112), when the first wall (112) and the third wall (116) are perpendicular, the angle (β) formed by the optical axis (L) of the light emitted from the light source (120) and the side wall (third wall (116)) of the chamber (110) where the light source (120) is installed may be in the range of 70º to 80º. More preferably, the angle (β) formed by the optical axis (L) of the light emitted from the light source (120) and the side wall (third wall (116)) of the chamber (110) where the light source (120) is installed may be in the range of 65º to 85º.

[0116] The light emitted from the light source unit (120) is irradiated to the stagnant fluid in the light irradiation area (A), and the organic floating matter in the fluid can absorb the light and emit light of a different wavelength as excitation light. The light sensor unit (130) is a detection means for detecting light in the chamber (110), and the excitation light emitted by the organic floating matter can be sensed by the light sensor unit (130). The light sensor unit (130) can have different light sensing sensitivities for each wavelength. At this time, the sensitivity of the light sensor unit (130) in the peak region of the excitation light can be 50% or more, and thus the excitation light can be easily sensed.

[0117] When the wavelength of the light emitted from the light source (120) is in the range of 350 nm to 450 nm, the excitation light may be light with a wavelength longer than the wavelength of the emitted light, and may be in the range of 450 nm to 700 nm. The intensity of the excitation light may have multiple peaks within the wavelength range of 450 nm to 700 nm.

[0118] In order to avoid noise caused by interference between the light emitted from the light source unit (120) and the excitation light, the difference in wavelength between the light emitted from the light source unit (120) and the excitation light may be 50 nm or more. The difference in wavelength between the peak wavelength of the light emitted from the light source unit (120) and the peak wavelength of the light detected by the light sensor unit (130) may be 50 nm or more.

[0119] Meanwhile, the light emitting element (122) of the light source unit (120) may be composed of a plurality of layers having different components, and at least one of the plurality of layers may be a layer having a relatively high Al composition. In addition, the light source unit (120) may have an energy band gap, and for example, may have an energy band gap of 2.75 eV to 3.26 eV.

[0120] Meanwhile, although an example in which the light source unit (120) has a narrow divergence angle has been described with reference to FIGS. 1 and 4, the scope of the present invention is not limited thereto. Specifically, the light source unit (120) may have a wide divergence angle of 120º or more, and at this time, the lens (126) may be formed in a flat plate shape with both the upper and lower surfaces as illustrated in FIG. 13. When the light source unit (120) has a wide divergence angle, the light is evenly irradiated over a wide area, thereby increasing the contact area with the fluid within the chamber (110), thereby increasing the detection efficiency of organic floating matters. At this time, in order to increase the detection accuracy, a reflector may be additionally arranged inside the chamber (110) to focus the light to a certain area.

[0121] The above-mentioned optical sensor unit (130) can detect organic floating matter in the fluid that has flowed into the internal space of the chamber (110). The optical sensor unit (130) may be, for example, an optical sensor capable of detecting the excitation light, and may further include a spectrometer that disperses the excitation light according to wavelength.

[0122] The above-mentioned optical sensor unit (130) can be installed in various locations as long as it can detect the excitation light. For example, the optical sensor unit (130) can be installed outside the chamber (110). Specifically, the optical sensor unit (130) can be installed outside the chamber (110) adjacent to the openings (110a, 110b).

[0123] The above-mentioned light sensor unit (130) may be installed adjacent to an opening (110a, 100b) of the chamber (110), and when a plurality of openings (110a, 110b) are provided, it may be installed more preferably adjacent to an opening closer to the light irradiation area (A), i.e., adjacent to the first opening (110a) as shown in FIG. 1.

[0124] The above-mentioned light sensor unit (130) is installed adjacent to the opening (110a, 110b) and can detect the excitation light coming out of the chamber (110) through the opening (110a, 110b).

[0125] The above-described optical sensor unit (130) may be composed of a plurality of layers having different components, and at least one of the plurality of layers may be a layer having a relatively high content of Ga or Cd. In addition, the optical sensor (130) may have an energy band gap, and for example, may have an energy band gap of 2.30 eV to 2.45 eV.

[0126] The above light emitting element (122) and the light sensor (130) may have different energy band gaps, and may have different temperature resistances due to the difference in energy band gaps, which may be advantageous for temperature management.

[0127] Meanwhile, the light sensor unit (130) may further include a light blocking coating for blocking light emitted from the light source unit (120). The light blocking coating may be provided on the light-incident unit side of the light sensor unit (130) where light is incident. Alternatively, the light blocking coating may be disposed on the upper surface of the light sensor unit. The light blocking coating may have a transmittance of less than 30% in the peak wavelength range of the light emitted from the light source unit (120). The light blocking coating may be a coating layer having a light transmittance of less than 30% at 350 nm to 400 nm.

[0128] The above light-blocking coating can transmit excited light generated from an organic suspension, and can have a transmittance of 60% or more. For example, the light-blocking coating can have a transmittance of 60% or more at 450 nm to 700 nm.

[0129] The above light-blocking coating may include a multilayer thin film structure designed to limit light transmittance in an ultraviolet wavelength band of 350 nm to 400 nm to less than 30% and maintain light transmittance in a visible wavelength band of 450 nm to 700 nm to 60% or more. The thin film structure may implement desired spectral characteristics by alternately laminating high-refractive-index materials such as TiO2 and ZrO2 and low-refractive-index materials such as SiO2 and MgF2 to induce an interference effect at a specific wavelength.

[0130] The above light-blocking coating may also be provided in the light source unit (120) described above, but the transmission area of ​​the light-blocking coating provided in the light sensor unit (130) may be different from the transmission area of ​​the light-blocking coating provided in the light source unit (120). This can reduce the overlapping area between the light-emitting element emission spectrum and the organic material excitation spectrum, and increase the accuracy of organic material detection.

[0131] Meanwhile, the optical sensor unit (130) may include an optical sensor, which may be a passive element that receives light energy and outputs an electrical signal. The electrical signal may be a current signal. For example, the optical sensor may be a phototransistor, a photoresistor, or a photodiode, which may be a light-receiving element that reads excitation light.

[0132] Meanwhile, FIG. 1 has been described with a focus on the case where the optical axis (L) of light emitted from the light source (120) and the first wall (112) are arranged to meet at an acute angle (α), but the present invention is not limited thereto, and the optical axis (L) may be positioned at various angles, such as being parallel to the first wall (112).

[0133] Meanwhile, the organic floating matter detection device (100) may further include an information processing unit that receives the sensing value sensed by the optical sensor unit (130) and calculates at least one piece of information among the type, presence, and amount of the organic floating matter through signal processing.

[0134] The above organic floating matter detection device (100) may further include a display unit that visually or audibly outputs information produced through the information processing unit.

[0135] In addition, the organic floating matter detection device (100) may further include a control unit (190) that receives data from the information processing unit and controls the operation of the organic floating matter detection device (100).

[0136] Additionally, the organic floating matter detection device (100) according to the present invention may further include a light quantity detection sensor installed adjacent to the light source unit (120) to detect the amount of light emitted through the light source unit (120).

[0137] The above control unit (190) can control the detection device (100) to output an alarm, such as a warning sound or warning display, when the sensing value detected by the light detection sensor falls below a reference value.

[0138] As another example, FIG. 2 illustrates an organic floating matter detection device (200) according to another embodiment of the present invention. Hereinafter, the organic floating matter detection device (200) of FIG. 2 will be described in detail, focusing on differences from the organic floating matter detection device (100) of FIG. 1.

[0139] In FIG. 2, the organic floating matter detection device (200) may have a fluid inflow path (P1), a fluid outflow path (P2), and an internal space (S1, S2) formed within the chamber (210).

[0140] The above inflow path (P1) is a path through which the fluid flows into the chamber (210) and may be connected to the first opening (210a). The above outflow path (P2) is a path through which the fluid flows out of the chamber (210) and may be connected to the second opening (210b). The first opening (210a) and the second opening (210b) may be located on different side walls of the chamber (210).

[0141] For example, referring to FIG. 2, the first opening (210a) and the second opening (210b) may be provided on different side walls of the chamber (210). The opening direction of the first opening (210a) and the opening direction of the second opening (210b) may be perpendicular to each other. At this time, the movement direction of the fluid in the first opening (210a) and the movement direction of the fluid in the second opening (210b) may be perpendicular to each other. Accordingly, the generation of vortices within the chamber (210) increases, and the time that the fluid remains within the chamber (210) increases, thereby improving the efficiency of detecting floating organic matter.

[0142] In addition, the first opening (210a) and the second opening (210b) can be formed at different heights from the top and bottom, and by adjusting the heights of the first opening (210a) and the second opening (210b), the moving speed of the fluid moving inside the chamber (210) can be controlled, and accordingly, the time that the fluid stays inside the chamber (210) can be increased, thereby improving the efficiency of detecting floating organic matter.

[0143] The chamber (210) may further include a reflective layer (T) coated on the inner wall (IS).

[0144] The internal space (S1, S2) may be a space where a fluid stays and moves between the inflow path (P1) and the outflow path (P2). A curved surface may be formed on the inner surface of the chamber (210) in the internal space (S1, S2). The curved surface may be formed along the path through which the fluid flows, and the curvature of the curved surface may vary depending on the section or area through which the air flows. A vortex may be generated through the curved surface on the inner surface of the chamber (210), thereby increasing the time for which the fluid stays within the chamber (210).

[0145] Meanwhile, the light source unit (220) is installed in the internal space of the chamber (210), and at this time, the light source unit (220) may include a light emitting element (222) and a base (223) that supports the light emitting element (222). The light emitting element (222) may be installed in the chamber (210) through the base (223).

[0146] The light emitting element (222) may be mounted on one surface of the base (223). Referring to FIGS. 14a and 14b, the base (223) may be a flat PCB, and a power connection portion (223b) may be provided on one surface of the base (223) to which a power line for supplying power to the light emitting element (222) is connected. FIG. 14a illustrates the upper surface of the base (223), and FIG. 14b illustrates the lower surface of the base (223).

[0147] A mounting area (223c) in which a light-emitting element (222) is mounted may be formed in one area of ​​the base (223), and a wiring area having a power connection portion (223b) may be formed in an outer portion of the base (223). Wiring and power may be connected at the power connection portion (223b) of the wiring area. The mounting area (223c) and the wiring area may be spaced apart from each other.

[0148] In addition, the base (223) includes a connection area (223d) that connects the mounting area (223c) and the wiring area, and the connection areas (223d) may be provided in multiple numbers along the edge of the mounting area (223c). The multiple connection areas (223d) may extend radially outward in a spoke shape from the edge of the mounting area (223c) and be connected to the wiring area. By separating the wiring area and the mounting area (223c), interference of light can be reduced and noise can be reduced.

[0149] A passage (223a) that vertically penetrates the base (223) may be formed between the connection area (223d), the wiring area, and the mounting area (223c). Light and fluid may travel through the passage (223a). That is, the passage (223a) may be a path through which light passes. The passage (223a) may be formed in a path through which fluid and light move. Although FIGS. 14a and 14b illustrate an embodiment in which four passages (223a) are provided, the present invention is not limited thereto. The passages (223a) may be provided in multiples so as not to impair the efficiency of the movement path of fluid or light.

[0150] The diameter (D1) of the above-described settling area (223c) may be larger than the width (D2) of the above-described connecting area (223d). Since the area of ​​the above-described settling area (223c) is formed relatively large, it can function as a heat dissipation unit that releases heat generated from the light-emitting element (222), thereby improving the reliability of the light-emitting element (222). At this time, the area of ​​the above-described settling area (223c) may be narrower than the area of ​​the passage (223a) in order to reduce the influence on the air flow rate.

[0151] In addition, a fastening hole (223e) for installation may be formed in one area of ​​the base (223). FIG. 15 illustrates a cross-sectional view of the fastening hole (223e) taken along line I-I'. A coating layer (PT) may be disposed in one area of ​​the base (223). The coating layer (PT) may be disposed in the fastening hole (223e). One area of ​​the fastening hole (223e) may be an exposed area (N) where the coating layer (PT) is omitted. For example, the coating layer (PT) may be omitted along the edge of the fastening hole (223e) to form an exposed area (N) that exposes the upper surface of the fastening hole (223e). By omitting the coating layer (PT) in a specific area, the height of the base (223) can be easily reduced.

[0152] A fastening screw or a shank can be mounted on the above fastening member (223e), and a part of the head area of ​​the screw or the shank can be inserted into the inner area of ​​the above exposure area (N). The light efficiency can be increased by minimizing the fastening screw from blocking the light path of the light emitting element (222). The depth of the above exposure area (N) can be deeper than the height of the coating layer (PT). The depth of the exposure area (N) can be varied depending on the height of the head of the screw.

[0153] The above fastener (223e) may be formed with a hole (H) that vertically penetrates the base (223). The hole (H) may form a section with a variable width. For example, the upper width (W1) of the hole (H) may be larger than the lower width (W2) of the hole (H). In addition, the hole (H) may form a section whose width narrows from the top to the bottom. Accordingly, the smallest width (W2) may be formed at the lowest point of the hole (H), and the fastener may be stably supported so as to be installed inside the hole (H).

[0154] Figures 14a and 14b illustrate a case where two of the fasteners (223e) are provided, but the present invention is not limited thereto and may be provided in various numbers.

[0155] The light source unit (220) may further include a light guide installed on the base (223). The light guide may be arranged in one area of ​​the base (223). The light guide may include a coating layer for reflecting light emitted from the light emitting element (222) to increase light efficiency and focus light. The coating layer may be an Al coating, a TiO2 coating, or a multi-dielectric coating layer. Alternatively, it may be a non-metallic reflective layer such as PTFE, PET, or a multi-layer polymer reflective film, and may be in the form of a film. The light emitting element (222) may be installed spaced apart from the base (223) through the light guide, thereby increasing heat dissipation efficiency.

[0156] The light guide and the light emitting element (222) may be arranged on opposite surfaces of the base (223). For example, when the light emitting element (222) is arranged on the upper surface of the base, the light guide may be arranged on the lower surface of the base (223). The light emitting element (222) and the light guide may overlap each other based on the upper and lower surfaces of the base (223).

[0157] Meanwhile, as illustrated in FIG. 2, the base (223) is installed across the internal space (S1, S2), thereby dividing the internal space (S1, S2) into a first internal space (S1) and a second internal space (S2) based on the base (223). That is, the internal space of the chamber (210) can be divided into a first internal space (S1) and a second internal space (S2) by the base.

[0158] At this time, the first internal space (S1) may be a space on the upper side of the base (223) and may be a space directly connected to the first opening (210a) and the second opening (210b).

[0159] In Fig. 2, the light emitting element (222) may be placed on the upper surface of the base (223) so as to face the first internal space (S1). This can reduce the design difficulty. However, the present invention is not limited thereto, and referring to Fig. 3, the light emitting element (222) may also be placed on the lower surface of the base (223) so as to face the second internal space (S2). This can reduce noise and improve accuracy by preventing light from being directed directly to the light sensor unit.

[0160] In Fig. 2, the path of the fluid introduced through the openings (210a, 210b) is indicated by arrow K. Referring to Fig. 2, the fluid introduced through the first opening (210a) may enter the first internal space (S1) and then move toward the second opening (210b) through the outflow path (P2), or may pass through the first internal space (S1), pass through the passage (223a) of the base (223), enter the second internal space (S2), then pass through the passage (223a) again, enter the first internal space (S1), and then move toward the second opening (210b) through the outflow path (P2).

[0161] That is, as the internal space (S1, S2) is divided into a first internal space (S1) and a second internal space (S2) and a passage (223a) is formed in the base (223), a structure can be formed in which the fluid stays in the internal space (S1, S2) for a long time and circulates by eddy current, and the retention time of the fluid increases, so that the efficiency of detecting organic floating matter can be improved.

[0162] Furthermore, the inner wall (upper wall) of the first internal space (S1) in the chamber (110) facing the upper surface of the base (223) may include a curved surface. Similarly, the inner wall (lower wall) of the second internal space (S2) in the chamber (110) facing the lower surface of the base (223) may include a curved surface. The curvatures of the upper and lower walls may vary depending on the region.

[0163] Additionally, the curved surfaces of the upper wall and the lower wall may have different curvatures. For example, the curvature of the curved surface of the upper wall may be greater than the curvature of the curved surface of the lower wall. The central portion of the upper wall may be in communication with the outflow path (P2).

[0164] For example, the curvature of one area of ​​the first internal space (S1) may be greater than the curvature of one area of ​​the second internal space (S2), and in the first internal space (S1) with greater curvature, the fluid flows relatively slowly, and in the second internal space (S2) with less curvature, the flow velocity may be relatively faster than that of the first internal space (S1), so that a vortex may be induced due to the difference in flow velocity. Through this structure, the residence time of the fluid may be increased, thereby improving the efficiency of detecting organic floating matter.

[0165] The radius of curvature of one area of ​​the first internal space (S1) may have a curvature smaller than the radius of curvature of one area of ​​the second internal space (S2), and the flow velocity of the second internal space (S2) may be made relatively slower than that of the first internal space (S1) to form a vortex.

[0166] In addition, as illustrated in FIG. 2, the organic floating matter detection device (200) may further include a third opening in addition to the openings (210a, 210b) forming an inflow or outflow path. At this time, the light sensor unit (230) may be installed on the side of the third opening and may detect excitation light through the third opening. At this time, a blocking member (290) may be installed between the outflow path (P2) and the second opening. The fluid may be moved in the direction of the outflow path (P2) by the blocking member (290).

[0167] At this time, the blocking member (290) may be a light-transmitting member that transmits the excited light by the organic floating matter. The blocking member (290) may further include a filter function that blocks the wavelength band of the light emitted from the light source unit (220).

[0168] That is, the blocking member (290) may be an optical filter that reflects some of the light within the chamber (210) and transmits some of the light depending on the wavelength. The optical filter may be a filter having high transmittance in a specific wavelength range. For example, the optical filter may have a transmittance of 80% or more in a range of 350 nm to 380 nm. The optical filter may be a bandpass filter. The optical filter may include a thin film interference structure formed by alternately stacking high refractive index layers, such as TiO2, Ta2O5, ZrO2, etc., and low refractive index layers, such as SiO2, MgF2, AlF3, etc., to selectively pass only a specific ultraviolet wavelength band. Through this multilayer structure, high selectivity and wavelength precision in the ultraviolet range can be secured.

[0169] Additionally, the blocking member (290) may be composed of an optical member for light refraction.

[0170] As another example, FIG. 3 illustrates an organic floating matter detection device (300) according to another embodiment of the present invention. Hereinafter, the organic floating matter detection device (300) of FIG. 3 will be described in detail, focusing on differences from the organic floating matter detection device (200) of FIG. 2.

[0171] In the above floating object detection device (300), the internal space of the chamber (310) is partitioned into a first internal space (S1) and a second internal space (S2) by the base (323), and a passage (323a) for connecting the first internal space (S1) and the second internal space (S2) may be formed in the base (323).

[0172] In Fig. 3, the first opening (310a) and the second opening (310b) may be connected to the first internal space (S1). At this time, the second opening (310b) is different from the floating object detection device (200) of Fig. 2 in that it is connected not from the upper side of the first internal space (S1) but from the side of the first internal space (S1). The fluid introduced through the first opening (310a) may not move to the upper side of the first internal space (S1), but may flow around the first internal space (S1) or pass through the second internal space (S2) to flow out to the second opening (310b). For example, the first opening (310a) and the second opening (310b) may be formed on the side walls of the chamber (310) facing each other.

[0173] The light source unit (320) may be installed on one side of the base (323) facing the second internal space (S2). Light emitted from the light source unit (320) is irradiated on the side wall of the chamber (310) in the second internal space (S2) and then reflected, and may enter the first internal space (S1) through the passage (323a) of the base (323).

[0174] That is, the light irradiation area (A) within the chamber (310) may be formed on the side of the second internal space (S2). Light irradiated to the light irradiation area (A) of the second internal space (S2) may be reflected toward the first internal space (S1). At this time, at least one of the first internal space (S1) or the second internal space (S2) may include a curved surface. Through the curved surface, a part of the light irradiation area may be made to have a different angle with the inner wall (IS) of the chamber (310) due to curvature. Through this, the area of ​​the light irradiation area (A) may be expanded and the excitation efficiency may be increased.

[0175] Meanwhile, referring to FIG. 5, the light emission pattern of light emitted from the light source unit (320) may have a first peak (PK1) and a second peak (PK2). In FIG. 5, the point where Deg is 0 is a point that coincides with the optical axis (L) of the light source unit (320), and the relative radiation amount (au) according to the angle from the optical axis (L) may have two first and second peaks (PK1, PK2) at points that are deviated from the optical axis (L). That is, the relative radiation amount (au) according to the orientation angle in the light emission pattern of the light source unit (320) may have a first peak (PK1) and a second peak (PK2) that have maximum values ​​at points that are deviated from 0º that is perpendicular to the light emitting element (322). The first peak (PK1) or the second peak (PK2) may be at a point inclined at an angle of -30º to -10º or +10º to +30º with respect to 0º.

[0176] As a result, referring to FIG. 6, at the point where the first peak (PK1) meets the inner wall (IS) of the second internal space (S2), the inclination of the side wall can be inclined by a specific angle (γ) with respect to the plane (horizontal plane) on which the light source unit (320) is arranged. The angle (γ) can be 10º to 30º. Through this, the area of ​​the light irradiation area (A) can be expanded and the excitation efficiency can be increased.

[0177] FIG. 6 illustrates the first peak (PK2), but at the point where the second peak (PK2) meets the side wall of the second internal space (S2), the side wall may also be inclined at a specific angle (γ) with respect to the plane (horizontal plane) on which the light source unit (320) is arranged. However, the inclinations of the side walls at the points where the first peak (PK1) and the second peak (P2) meet may be different from each other. At this time, the angle that the first peak (PK1) or the second peak (PK2) forms with the inner wall (IS) in the light-emitting pattern of the light-emitting element (322) may be an acute angle. The angle formed by the tangent (V) to the inner wall (IS) at the point where the first peak (PK1) or the second peak (PK2) meets the inner wall (IS) and the vertical axis (L) of the light-emitting element (322) may be 70º to 80º. Through this, the area of ​​the light irradiation area (A) in the second internal space (S2) can be expanded and the efficiency here can be increased.

[0178] The above-mentioned light sensor unit (330) is installed on the side of the first internal space (S1) and can detect reflected light reflected from the second internal space (S2) toward the first internal space (S1).

[0179] At this time, the organic floating matter detection device (300) may further include an optical filter (390) that reflects a portion of the light within the chamber (310) and transmits a portion of the light depending on the wavelength. The optical filter (390) may be a filter having high transmittance in a specific wavelength range. For example, the optical filter (390) may have a transmittance of 80% or more in the range of 350 nm to 380 nm. The optical filter (390) may be a bandpass filter. The optical filter (390) may include a thin film interference structure formed by alternately stacking a high refractive index layer, such as TiO2, Ta2O5, ZrO2, etc., and a low refractive index layer, such as SiO2, MgF2, AlF3, etc., to selectively pass only a specific ultraviolet wavelength band. Through this multilayer structure, high selectivity and wavelength precision in the ultraviolet range can be secured.

[0180] For example, the optical filter (390) may be a dichronic mirror.

[0181] The above optical filter (390) is installed obliquely with respect to the optical path, so that a portion of the light can be reflected toward the upper side of the chamber (310) and a portion of the light can be transmitted as is. The optical paths of the reflected light and the transmitted light can form a 90° angle.

[0182] The above optical sensor unit (330) may include a first optical sensor unit (330a) that detects reflected light reflected from the optical filter (390) and a second optical sensor unit (330b) that detects transmitted light passing through the optical filter (390).

[0183] The above first optical sensor unit (330a) is a sensor that detects the reflected light reflected by the excitation light from the optical filter (390), and can be installed at a position corresponding to the second opening (210b) side in the organic floating matter detection device (200) of FIG. 2. However, in the case of the organic floating matter detection device (300) of FIG. 3, the area where the first optical sensor unit (330a) is installed is not an area where the fluid flows out toward the side where the reflected light is irradiated, and the fluid inside the chamber (310) has a structure in which it returns through a separate second opening (310b) that is connected to the side of the first internal space (S1).

[0184] The above second optical sensor unit (330b) is a sensor that detects transmitted light that has passed through the optical filter (390) and can be configured in various ways.

[0185] By synthesizing the data detected by the first optical sensor unit (330a) and the second optical sensor unit (330b), organic floating matter can be detected, thereby further improving detection accuracy.

[0186]

[0187] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art or having ordinary knowledge in the art that various modifications and changes to the present invention can be made without departing from the spirit and technical scope of the present invention as set forth in the claims to be described below.

[0188] Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the patent claims.

[0189] The following examples illustrate various devices, arrangements, manufacturing and processing methods, and operating methods. These items illustrate embodiments according to the principles and concepts of the present invention. The disclosed features may be combined in any technically feasible manner, and the scope of such combinations is not limited to the specific examples presented below.

[0190] Additional embodiments are described in the following paragraphs.

[0191] Example 1: One embodiment of the present invention is a floating matter detection device for detecting floating matters in a fluid, comprising: a chamber having a light irradiation area on the inner wall of which forms a path for the fluid to move, a light source unit for irradiating light to the light irradiation area, and a light sensor unit for detecting light within the chamber, wherein the chamber may include an opening for introducing or discharging the fluid into or out of the inner space of the chamber.

[0192] The angle formed by the optical axis of the light emitted from the light source and the inner wall of the chamber where the light irradiation area is formed may be between 10º and 20º.

[0193] The above light irradiation area is formed on the first wall of the chamber, and the light source unit can be placed on a third wall unit that is different from the first wall unit.

[0194] The second wall portion may be adjacent to the third wall portion.

[0195] The optical axis of the light emitted from the above light source unit can form an acute angle with the first wall unit.

[0196] The angle formed between the optical axis of the light emitted from the light source and the third wall may be 70º to 80º.

[0197] The above light source unit includes a light emitting element, and the area of ​​the light irradiation area may be larger than the area of ​​the light emitting element.

[0198] The above floating object detection device may further include the optical sensor unit.

[0199] The above optical sensor unit can be installed outside the chamber.

[0200] The above-mentioned optical sensor unit may be placed in an area adjacent to the opening.

[0201] The above-mentioned optical sensor unit may have an energy band gap of 2.30 eV to 2.45 eV.

[0202] The above-mentioned optical sensor unit may further include a light-blocking coating.

[0203] A light-blocking coating may be placed on the upper surface of the above-mentioned optical sensor unit.

[0204] The above light-blocking coating may have a transmittance of less than 30% in the peak wavelength range of light emitted from the light source.

[0205] The above opening includes a first opening and a second opening, and the first opening and the second opening can be arranged on the same wall portion.

[0206] The above floating object detection device may further include a reflective layer.

[0207] The above light source unit may include a lens capable of adjusting a divergence angle toward the light irradiation area.

[0208] Embodiment 2: One embodiment of the present invention is a floating matter detection device for detecting floating matters in a fluid, comprising: a chamber having a light irradiation area on an inner wall of which a path for the fluid to move is formed and light is irradiated; a light source unit including a light emitting element for irradiating light to the light irradiation area and a light sensor unit for detecting light within the chamber; wherein the chamber includes an opening for introducing or discharging the fluid into or out of an internal space of the chamber; the base may be arranged across the internal space of the chamber; the chamber may be divided into a first internal space and a second internal space based on the base; and the light emitting element may be arranged to face the first internal space.

[0209] The above opening includes a first opening and a second opening, and the opening direction of the first opening and the opening direction of the second opening can be perpendicular to each other.

[0210] The above floating object detection device may further include a reflective layer.

[0211] The light emitting element of the above light source unit can be placed on the base.

[0212] In one area of ​​the above base, a mounting area where a light-emitting element is mounted and a wiring area where wiring and power are connected are formed, and the mounting area and the wiring area can be spaced apart from each other.

[0213] The diameter of the settling area of ​​the above base may be larger than the width of the above connecting area.

[0214] A passage can be formed that penetrates the above base upward and downward.

[0215] The area of ​​the settling area of ​​the above base may be narrower than the area of ​​the above passage.

[0216] A fastening hole may be formed in one area of ​​the above base.

[0217] A coating layer may be placed on the above fastener.

[0218] One area of ​​the above fastener may be an exposed area where the coating layer is omitted.

[0219] A hole that penetrates the base from top to bottom can be formed in the above fastener.

[0220] A light guide may be placed in one area of ​​the above base.

[0221] The light guide and the light emitting element may be arranged on opposite sides of the base.

[0222] The above light source unit may include a lens capable of adjusting a divergence angle toward the light irradiation area.

[0223] Embodiment 3: One embodiment of the present invention is a floating matter detection device for detecting floating matters in a fluid, comprising: a chamber having a light irradiation area on an inner wall of which a path for the fluid to move is formed and light is irradiated; a light source unit including a light emitting element for irradiating light to the light irradiation area and a light sensor unit for detecting light within the chamber; wherein the chamber includes an opening for introducing or discharging the fluid into or out of an internal space of the chamber; the base may be arranged across the internal space of the chamber; the chamber may be divided into a first internal space and a second internal space based on the base; and the light emitting element may be arranged to face the second internal space.

[0224] At least one inner wall of the first inner space or the second inner space may include a curved surface.

[0225] The light emission pattern of the light source of the above light emitting element may have a first peak and a second peak, the relative radiance according to the direction angle having a maximum value at an angle point deviating from 0º perpendicular to the light emitting element.

[0226] The first peak or the second peak may be at a point inclined at an angle of -30º to -10º or 10º to 30º with respect to 0º.

[0227] The angle formed by the tangent to the inner wall (IS) and the vertical axis of the light emitting element at the point where the first peak or the second peak meets the inner wall may be 70º to 80º.

[0228] The above floating object detection device may further include a reflective layer.

[0229] The light emitting element of the above light source unit can be placed on the base.

[0230] In one area of ​​the above base, a mounting area where a light-emitting element is mounted and a wiring area where wiring and power are connected are formed, and the mounting area and the wiring area can be spaced apart from each other.

[0231] The diameter of the settling area of ​​the above base may be larger than the width of the above connecting area.

[0232] A passage can be formed that penetrates the above base upward and downward.

[0233] The area of ​​the settling area of ​​the above base may be narrower than the area of ​​the above passage.

[0234] A fastening hole may be formed in one area of ​​the above base.

[0235] A coating layer may be placed on the above fastener.

[0236] One area of ​​the above fastener may be an exposed area where the coating layer is omitted.

[0237] A hole that penetrates the base from top to bottom can be formed in the above fastener.

[0238] A light guide may be placed in one area of ​​the above base.

[0239] The light guide and the light emitting element may be arranged on opposite sides of the base.

[0240] The above light source unit may include a lens capable of adjusting a divergence angle toward the light irradiation area.

Claims

1. As an organic floating matter detection device, A chamber having a light irradiation area where light is irradiated on the inner wall and forming a path for fluid movement, comprising a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, and comprising a light source unit for irradiating light to the light irradiation area, and a light sensor unit for detecting light within the chamber. The chamber includes an opening for introducing or discharging the fluid into the internal space of the chamber, The above optical sensor unit is an organic matter detection device that detects organic matter in a fluid that has flowed into the internal space of the chamber.

2. In claim 1, An organic floating matter detection device in which the optical axis of light emitted from the light source unit and the inner wall of the chamber in which the light irradiation area is formed form an acute angle.

3. In claim 2, An organic floating matter detection device in which the angle formed by the optical axis and the inner wall of the chamber in which the light irradiation area is formed is between 10º and 20º.

4. In claim 1, An organic floating matter detection device in which the peak wavelength of light emitted from the above light source is between 350 nm and 400 nm.

5. In claim 1, The above-mentioned optical sensor unit is an organic floating matter detection device that detects excitation light caused by the organic floating matter.

6. In claim 1, An organic floating matter detection device having a divergence angle of the light source of 60º or less.

7. In claim 1, The above optical sensor unit is an organic floating matter detection device installed adjacent to the opening.

8. In claim 1, The above light source unit is an organic floating matter detection device including a light emitting element and a base supporting the light emitting element.

9. In claim 8, An organic floating matter detection device, wherein the light source unit further includes a lens disposed above the light emitting element.

10. In claim 8, The light source unit further includes a substrate forming a concave cavity in which the light emitting element is mounted, An organic floating matter detection device in which the side of the above cavity is an inclined reflective surface.

11. In claim 9, An organic floating matter detection device wherein the light source portion further includes a reflective side wall portion surrounding the side of the lens and reflecting light emitted from the lens.

12. In claim 9, An organic floating matter detection device, wherein the light source unit further includes at least one optical element that focuses light emitted from the lens.

13. In claim 9, An organic floating matter detection device, wherein the light source unit further includes an optical filter unit that is positioned above the lens and transmits light of a specific wavelength.

14. In claim 8, The internal space of the above chamber is divided into a first internal space and a second internal space by the base, An organic floating matter detection device in which a passage is formed in the above base to connect the first internal space and the second internal space.

15. In claim 14, The above light source unit is installed on one side of the base facing the second internal space, The above opening is an organic floating matter detection device that is connected to the first internal space.

16. In claim 15, The chamber further includes a reflective layer coated on the inner wall, An organic floating matter detection device wherein the above-mentioned optical sensor unit is installed on the first internal space side and detects reflected light reflected from the second internal space toward the first internal space side.

17. In claim 1, Further comprising an optical filter that reflects some of the light within the chamber and transmits some of the light depending on the wavelength; An organic floating matter detection device including a first optical sensor unit that detects reflected light reflected from the optical filter and a second optical sensor unit that detects transmitted light passing through the optical filter.

18. In claim 1, An organic floating matter detection device in which the light emission pattern emitted from the above light source unit has a first peak and a second peak.

19. As an organic floating matter detection device, A chamber having a light irradiation area where light is irradiated on the inner wall and forming a path for fluid movement, comprising a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, and comprising a light source unit for irradiating light to the light irradiation area, and a light sensor unit for detecting light within the chamber. The divergence angle of the above light source is 60º or less, The above optical sensor unit is an organic matter detection device that detects organic matter in a fluid that has flowed into the internal space of the chamber.

20. As an organic floating matter detection device, A chamber having a light irradiation area where light is irradiated on the inner wall and forming a path for fluid movement, comprising a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, and comprising a light source unit for irradiating light to the light irradiation area, and a light sensor unit for detecting light within the chamber. The wavelength difference between the peak wavelength of light emitted from the light source and the peak wavelength of light detected by the light sensor is 50 nm or more, The above optical sensor unit is a floating matter detection device that detects organic floating matter in the fluid that has flowed into the internal space of the chamber.

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