KR20200107317A - Optical scattering detection device with an anti-contamination tube - Google Patents

Abstract

The present invention relates to a light scattering measurement device and, more specifically, to a light scattering measurement device with an anti-contamination tube which can prevent fine dust from being attached to or accumulated on the inside of a chamber. To this end, the light scattering measurement device comprises: a chamber (110); an inlet (120) and an outlet (125) to allow sample gas (170) to flow into the chamber (110) to be discharged; a light emission unit (130) to emit a laser beam (136) toward the inside of the chamber (110); and a detection unit (140) to detect the laser beam (136) scattered by the sample gas (170). The light scattering measurement device further comprises an anti-contamination tube (200) which connects the gap between the inlet (120) and the outlet (125) to allow the sample gas (170) to pass therethrough, and is formed to be transparent to allow the laser beam (136) to be emitted toward the passing sample gas (170).

Description

Light scattering detection device with an anti-contamination tube}

The present invention relates to a light scattering measuring device, and more particularly, to a light scattering measuring device having an antifouling tube.

Recently, air pollution has become serious due to the influence of fine dust. Even smooth breathing may be difficult in urban areas due to periodically repeated yellow dust, various fine dusts, and smog, and dust particles distributed in the atmosphere may scatter sunlight and obscure the view. When such fine dust is inhaled into the human body as it is, it can penetrate into the alveoli and cause various lung diseases and respiratory diseases.

Various types of measuring equipment have been developed to determine the concentration of these dust particles and monitor air pollution conditions. A representative of these measuring devices is a light scattering measuring device that measures the concentration of fine dust contained in a sample gas using laser light and scattering of fine dust.

1 is a schematic configuration diagram of a conventional light scattering measuring apparatus, FIG. 2 is a real perspective view of the chamber 10 in FIG. 1, and FIG. 3 is an enlarged perspective view of the interior of the chamber 10 in FIG.

First, as shown in FIG. 1, as the pump 27 is operated, fine inflow dust 72 together with the sample gas (eg, atmosphere, 70) enters the interior of the chamber 10 through the inlet 20. .

Then, the laser light 36 is irradiated from the light emitting unit 30 composed of the laser oscillation unit 34 and the focusing unit 32. The scattered light 84 scattered by the incoming dust 72 is detected by the detection unit 40 and converted into an electrical signal.

The calculation unit 50 calculates the concentration of fine dust contained in the sample gas 70 based on this electrical signal. When the concentration of fine dust is high, a lot of scattering occurs, and the luminous intensity of the scattered light 84 is high.

The calculated concentration of fine dust is displayed on the display 65 through the control unit 60. Thereafter, the sample gas 70 is discharged to the outside through the outlet 25.

A reflector 80 for reflecting the laser light 36 is provided on the upper surface of the inner space 12 of the chamber 10, and a trap for erasing the laser light 36 in the irradiation direction of the laser light 36 A portion 88 is provided.

However, such a conventional light scattering measuring device has the following problems. That is, in order to continuously or in real time measure the concentration of fine dust in the atmosphere, the sample gas and the inflow dust 72 continue to flow through the inlet 20. The sample gas 70 used for the concentration measurement becomes the exhaust gas 29 and is discharged, but some of the inflow dust 72 is attached to the inner space 12 due to the influence of static electricity, etc. to remain as adherent dust 74. do.

Therefore, as the operation of the light scattering measuring device continues, the amount of adhered dust 74 increases, so that the adhered dust 74 is reflected in the reflective unit 80, the detection unit 40, the focusing unit 32, and other internal spaces ( The phenomenon of accumulation on the surface of 12) occurred. Due to the accumulated dust 74, it is difficult to accurately measure the concentration of fine dust, and there is a problem of outputting an incorrect measurement value.

Conventionally, in order to solve this problem, the manager stops the operation of the light scattering measuring device every certain period (e.g., every one week or every day in heavy pollution), disassembles the chamber 10, and removes the adhered dust 74 inside. I had cleaned it.

Therefore, the disassembly, assembly, and cleaning of the light scattering measuring device are very cumbersome, and a separate manager must be put in for this, so that there is a disadvantage in that maintenance of the light scattering measuring device is very inconvenient and expensive.

(1) Korean Patent Registration No. 10-1606561 (Dust particle measuring method and dust particle measuring device) (2) Japanese Unexamined Patent Application Publication No. Hei 9-259256 (fine particle measuring device)

Accordingly, the present invention has been devised to solve the above problems, and the object to be solved of the present invention is to prevent fine dust from attaching or accumulating inside the chamber by separating the chamber from the sample gas containing fine dust. It is to provide a light scattering measuring device having an antifouling tube.

Another object of the present invention is to provide a light scattering measuring device having an antifouling tube that allows easy cleaning even if the light scattering measuring device is cleaned.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following description. It will be understandable.

In order to achieve the above technical problem, the chamber 110; An inlet 120 and an outlet 125 through which the sample gas 170 is introduced and discharged into the chamber 110; In the light scattering measuring device including; a light-emitting unit 130 for irradiating the laser light 136 toward the interior of the chamber 110 and a detection unit 140 for detecting the laser light 136 scattered by the sample gas 170 In the antifouling tube formed transparently so that the sample gas 170 passes by connecting between the inlet 120 and the outlet 125 and the laser light 136 is irradiated toward the passing sample gas 170 (200); It is provided with a light scattering measuring apparatus having an antifouling tube, characterized in that it comprises.

In addition, an inlet adapter 220 that is detachably coupled between the inlet 120 and one end of the antifouling pipe 200; And an outlet adapter 230 detachably coupled between the outlet 125 and the other end of the antifouling pipe 200.

In addition, at least one of the inlet adapter 220 and the outlet adapter 230 is formed of an elastic material to facilitate attachment and detachment.

In addition, a first through hole 225 communicating with the inlet 120 is further formed in the inlet adapter 220.

In addition, the outlet adapter 230 is further formed with a second through hole 235 communicating with the outlet 125.

In addition, at least some of the outer surfaces of the antifouling tube 200 form a plane perpendicular to the irradiation direction of the laser light 136.

In addition, the cross section in the longitudinal direction of the antifouling pipe 200 has a hollow square shape.

Further, an antifouling coating layer for preventing contamination from the sample gas 170 is further formed on the inner surface of the antifouling pipe 200.

In addition, among the chamber 110, a trap unit 188 for erasing the laser light 136 is further formed in the irradiation direction of the laser light 136, and the trap unit 188 includes charcoal.

In addition, at least one surface of the chamber 110 further includes a mirror for reflecting the laser light 136.

In addition, the mirror may include a first mirror 250 formed on one of the opposite sides of the chamber 110; And a second mirror 260 formed on the other surface of the opposite surfaces.

In addition, at least one of the first mirror 250 and the second mirror 260 is detachable from the chamber 110.

In addition, a detection unit 140 is provided in some of the second mirrors 260.

According to an embodiment of the present invention, by separating the chamber from the sample gas containing fine dust, it is possible to prevent the fine dust from attaching or accumulating inside the chamber. Accordingly, the interior of the chamber is always kept in a clean state, so that cleaning is not required, and a reliable fine dust concentration value can be obtained.

Even if the light scattering measuring device is cleaned, it is not necessary to clean the chamber, but to separate the anti-fouling pipe and clean only the anti-fouling pipe.

However, the effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. I will be able to.

The following drawings attached in the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention to be described later. It is limited to and should not be interpreted.
1 is a schematic configuration diagram of a conventional light scattering measuring device,
2 is a perspective view of the chamber 10 in FIG. 1,
3 is an enlarged perspective view of the interior of the chamber 10 in FIG. 2,
4 is a perspective view of a light scattering measuring device having an antifouling tube according to an embodiment of the present invention,
5 is an enlarged perspective view of the interior of the chamber 110 in FIG. 4,
6 to 9 are assembly procedures showing step-by-step assembly procedures of the light scattering measuring apparatus having an antifouling pipe shown in FIG. 4.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be modified in various ways and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only those effects, the scope of the present invention should not be understood as being limited thereto.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a component is "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between the constituent elements, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to specified features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in a commonly used dictionary should be interpreted as having the meaning of the related technology in context, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Configuration of the embodiment

Hereinafter, a configuration of a preferred embodiment will be described in detail with reference to the accompanying drawings.

4 is a perspective view of a light scattering measuring device having an antifouling tube according to an embodiment of the present invention, and FIG. 5 is an enlarged perspective view of the interior of the chamber 110 in FIG. 4.

As shown in FIGS. 4 and 5, an inlet 120 is formed at one side of the chamber 110 so that the sample gas 170 may flow into the chamber 110. An outlet 125 is formed at the other side of the chamber 110 so that the sample gas 170 whose concentration is measured becomes the exhaust gas 129 and may be discharged.

The light emitting unit 130 generates a laser light 136 and irradiates it into the chamber 110. To this end, the light emitting unit 130 includes a laser oscillation unit and a focusing unit (see FIG. 1). The laser light 136 is arranged to be irradiated at a right angle to the flow direction of the sample gas 170. The laser light 136 may be a laser light having a wavelength of 809 nm.

A first mirror 250 is attached to the reflector 180 to reflect the laser light 136 into the chamber 110.

As shown in FIG. 5, the trap unit 188 prevents the laser light 136 arriving as an optical trap member from being reflected and is erased. The trap unit 188 is installed on the inner surface of the chamber 110 in the irradiation direction of the laser light 136, and a member such as charcoal is filled therein.

The antifouling pipe 200 is a hollow square tube with an empty inside and is formed of a transparent material (eg, synthetic resin, glass, etc.). One end of the antifouling pipe 200 is detachably fixed to the inlet 120, and the other end is detachably fixed to the outlet 125. The cross section in the longitudinal direction of the antifouling pipe 200 has a hollow square shape. Both sides of the cross section are perpendicular to the laser light 136 so that the laser light 136 is vertically introduced into the antifouling tube 200. The sample gas 170 flows into the antifouling pipe 200.

An antifouling coating layer (not shown) is formed on the inner surface of the antifouling pipe 200 and serves to prevent contamination from the sample gas 170. Since the inner surface of the antifouling pipe 200 is a region in continuous contact with the sample gas 170, the inside may be covered with fine dust and pollutants (NOx, SOx) as the use period elapses. To prevent this, the inner surface can be coated with an antifouling coating layer (eg, a transparent antifouling paint) to maintain a longer cleaning interval.

6 is an exploded perspective view of such an antifouling pipe 200. As shown in FIG. 6, an inlet adapter 220 is assembled at one end of the antifouling pipe 200, and an outlet adapter 230 is assembled at the other end.

The inlet adapter 220 is formed of a material that is elastic, deformable, and can be easily restored, such as rubber, synthetic resin, silicone, and urethane. This is to allow the inlet adapter 220 and the antifouling pipe 200 to be easily installed or separated from the chamber 110 by hand. In addition, by inserting the inlet adapter 220 into the inlet port 120, gas leakage between the inlet port 120 and the inlet adapter 220 is prevented, and airtightness between the inlet adapter 220 and the antifouling pipe 200 is maintained. It is to do. In addition, a first through hole 225 is formed in the center of the inlet adapter 220 to provide a passage through which the sample gas 170 can flow.

The outlet adapter 230 is formed of a material that is elastic, deformable, and can be easily restored, such as rubber, synthetic resin, silicone, and urethane. This is to enable the outlet adapter 230 and the antifouling pipe 200 to be easily installed or separated from the chamber 110 by hand. In addition, by inserting the outlet adapter 230 into the outlet 125, gas leakage between the outlet 125 and the outlet adapter 230 is prevented, and airtightness between the outlet adapter 230 and the antifouling pipe 200 is maintained. It is to do. In addition, a second through hole 235 is formed in the center of the outlet adapter 230 to provide a passage through which the sample gas 170 can flow.

9 shows a step of assembling the mirror after assembling the antifouling pipe 200. As shown in FIG. 9, the first mirror 250 is detachably assembled to the reflective unit 180. The first mirror 250 serves to reflect the scattered laser light 136.

The second mirror 260 is detachably assembled at a position facing the first mirror 250. The second mirror 260 also serves to reflect the scattered laser light 136. The second mirror 260 is provided with a detection unit 140 in a central region, and the detection unit 140 converts the intensity of received light into an electrical signal. A typical embodiment of the detection unit 140 is a photodiode.

Both the first and second mirrors 250 and 260 may be provided, or only one may be provided if necessary. The detection unit 140 is provided on the second mirror 260, but may be provided on the first mirror 250 or may be installed on another inner surface of the chamber 110 if necessary.

6 to 9 are assembly procedures showing step-by-step assembly procedures of the light scattering measuring apparatus having an antifouling pipe shown in FIG. 4. As shown in FIG. 6, first, the inlet adapter 220 and the outlet adapter 230 are assembled at both ends of the antifouling pipe 200.

Then, as shown in FIG. 7, the antifouling pipe 200 is assembled in the chamber 110. At this time, the inlet adapter 220 is fitted in the inlet 120, and the outlet adapter 230 is fitted in the outlet 125.

Then, as shown in FIG. 8, the inlet 120 and outlet 125 members are assembled at both outer sides of the chamber 110, respectively.

Next, as shown in FIG. 9, the first mirror 250 is assembled on the upper portion of the chamber 110 and the second mirror 260 is assembled to the lower portion of the chamber 110 to complete.

If the antifouling pipe 200 is to be repaired, replaced, or cleaned, the first mirror 250 is separated as shown in FIG. 9 and then the inlet 120 and the outlet 125 are separated as shown in FIG. 8. In this case, it may be separated by a second mirror 260 as necessary. Then, the antifouling pipe 200 is separated as shown in FIG. 7. As shown in FIG. 6, the separated antifouling pipe 200 separates the inlet adapter 220 and the outlet adapter 230 on both sides, and then cleans the inner surface of the antifouling pipe 200.

Example operation

Hereinafter, the operation of the preferred embodiment will be described in detail with reference to the accompanying drawings.

First, referring to FIG. 4, the sample gas 170 containing fine dust passes through the antifouling pipe 200 in the chamber 110 through the inlet 120 and then exits through the outlet 125. In this case, the sample gas 170 does not contact the inner surface of the chamber 110 but only the inner surface of the antifouling pipe 200. Accordingly, there is no case that the inner surface of the chamber 110 is damaged by fine dust or contaminants.

After the laser light 136 is irradiated from the light emitting unit 130, it passes through the antifouling tube 200 vertically and disappears in the trap unit 188. At this time, the laser light 136 comes into contact with the sample gas 170 inside the antifouling tube 200 and causes scattering due to fine dust contained in the sample gas 170. As the concentration of fine dust increases, the amount of scattered light increases, and the interior of the chamber 110 is filled with scattered light. The first and second mirrors 250 and 260 serve to reflect such scattered light.

At this time, the detection unit 140 converts the received scattered light into an electrical signal and outputs it. The operation unit 50 and the control unit 60 shown in FIG. 1 process these electrical signals and display the fine dust concentration value on the display 65. Components not described in the present invention (eg, a pump, etc.) are similar to those of FIG. 1.

Further, the laser light 136 passing through the antifouling tube 200 is irradiated to the trap unit 188 and is not reflected and disappears. This is to obtain only the scattered light due to fine dust and block the reflected light from other components.

Detailed description of the preferred embodiments of the present invention disclosed as described above has been provided to enable those skilled in the art to implement and implement the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art may use the configurations described in the above-described embodiments in a manner that combines with each other. Thus, the invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, the embodiments may be configured by combining claims that do not have an explicit citation relationship in the claims, or may be included as new claims by amendment after filing.

10: chamber,
12: internal space,
20: inlet,
25: outlet,
27: pump,
29: exhaust gas,
30: light emitting part,
32: cluster,
34: laser oscillation unit,
36: laser light,
40: detection unit,
50: operation unit,
60: control unit,
65: display,
70: sample gas,
72: inflow dust,
74: adhering dust,
80: reflector,
84: scattered light,
88: trap part,
110: chamber,
120: inlet,
121: inlet nozzle,
125: outlet,
129: exhaust gas,
130: light emitting part,
136: laser light,
140: detection unit,
170: sample gas,
84: scattered light,
188: trap part,
200: antifouling pipe,
215: inner wall,
220: inlet adapter,
225: first through hole,
230: outlet adapter,
235: second through hole,
250: first mirror.
260: second mirror.

Claims (14)

Chamber 110;
An inlet 120 and an outlet 125 through which the sample gas 170 is introduced and discharged into the chamber 110;
Light scattering measurement including; a light-emitting unit 130 for irradiating the laser light 136 toward the interior of the chamber 110 and a detection unit 140 for detecting the laser light 136 scattered by the sample gas 170. In the device,
An antifouling tube transparently formed to connect between the inlet 120 and the outlet 125 so that the sample gas 170 passes and the laser light 136 is irradiated toward the passing sample gas 170 ( 200); Light scattering measuring device having an antifouling tube, characterized in that it comprises. The method of claim 1,
An inlet adapter 220 detachably coupled between the inlet 120 and one end of the antifouling pipe 200; And
Light scattering measuring apparatus having an antifouling pipe, characterized in that it further comprises at least one of; an outlet adapter 230 detachably coupled between the outlet 125 and the other end of the antifouling pipe 200. The method of claim 2,
At least one of the inlet adapter 220 and the outlet adapter 230 is formed of an elastic material to facilitate attachment and detachment. The method of claim 2,
The light scattering measuring device having an antifouling pipe, characterized in that the inlet adapter 220 further includes a first through hole 225 communicating with the inlet 120. The method of claim 2,
A light scattering measuring apparatus having an antifouling pipe, characterized in that the outlet adapter 230 further includes a second through hole 235 communicating with the outlet 125. The method of claim 1,
Light scattering measuring apparatus having an antifouling tube, characterized in that at least some of the outer surfaces of the antifouling tube 200 form a plane perpendicular to the irradiation direction of the laser beam 136. The method of claim 6,
Light scattering measuring device having an antifouling pipe, characterized in that the longitudinal cross section of the antifouling pipe 200 has a hollow square shape. The method of claim 1,
A light scattering measuring device having an antifouling pipe, characterized in that an antifouling coating layer for preventing contamination from the sample gas 170 is further formed on the inner surface of the antifouling pipe 200. The method of claim 1,
A light scattering measuring apparatus having an antifouling tube, characterized in that in the chamber 110, a trap unit 188 for erasing the laser light 136 is further formed in the irradiation direction of the laser light 136. The method of claim 9,
The trap unit 188 is a light scattering measuring device having an antifouling pipe, characterized in that containing charcoal. The method of claim 1,
Light scattering measuring apparatus having an antifouling tube, characterized in that at least one surface of the chamber 110 further comprises a mirror for reflecting the laser light (136). The method of claim 11,
The mirror,
A first mirror 250 formed on one of the opposite sides of the chamber 110; And
A light scattering measuring device having an antifouling tube, comprising: a second mirror (260) formed on the other surface of the opposite sides. The method of claim 12,
At least one of the first mirror 250 and the second mirror 260 is detachable from the chamber 110. Light scattering measuring apparatus having an antifouling tube. The method of claim 12,
A light scattering measuring device having an antifouling tube, characterized in that the detection unit 140 is provided in some of the second mirrors 260.

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