KR20170097391A - Sensor device for sensing fine dust - Google Patents

Sensor device for sensing fine dust Download PDF

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Publication number
KR20170097391A
KR20170097391A KR1020160019066A KR20160019066A KR20170097391A KR 20170097391 A KR20170097391 A KR 20170097391A KR 1020160019066 A KR1020160019066 A KR 1020160019066A KR 20160019066 A KR20160019066 A KR 20160019066A KR 20170097391 A KR20170097391 A KR 20170097391A
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KR
South Korea
Prior art keywords
dust
branch passage
flow path
air
branch flow
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Application number
KR1020160019066A
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Korean (ko)
Inventor
장규열
강석중
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암페놀센싱코리아 유한회사
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Priority to KR1020160019066A priority Critical patent/KR20170097391A/en
Publication of KR20170097391A publication Critical patent/KR20170097391A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/9018—Dirt detection in containers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
    • G01N21/9072—Investigating the presence of flaws or contamination in a container or its contents with illumination or detection from inside the container
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The present invention relates to a sensor device to sense fine dusts, which senses fine dusts. More specifically, the sensor device senses the fine dusts by a sensing unit by inducing separation of the fine dust in a cascade impactor method. In the cascade impactor method, a first branch flow path (21), a second branch flow path (22), and a third branch flow path (23) are formed by being branched. The first branch flow path (21) is formed between an air inlet (11) and an air outlet (12) of a sensor housing (10), and large dusts passes in the first branch flow path (21) as the first branch flow path (21) is directly connected to the air inlet (11). The second branch flow path (22) is branched from a side of the first branch flow path, and small dusts passes in the second branch flow path (22). The third branch flow path (23) is branched from a side of the second branch flow path (22), and the fine dusts passes in the third branch flow path (23). The sensor device to sense fine dusts is able to prevent contamination of the sensing unit, and is able to improve a sensing accuracy of the fine dusts without exposing the sensing unit to all dust sizes.

Description

Technical Field [0001] The present invention relates to a sensor device for fine dust detection,

More particularly, the present invention relates to a sensor device for fine dust detection, and more particularly, to a sensor device for fine dust detection, which more specifically detects minute dust in intake air by a cascade impactor, And more particularly, to a sensor device for fine dust detection, which not only improves the detection precision of fine dust but also prevents contamination of the sensor portion.

Generally, the dust sensor is a sensor that detects the concentration and size of dust.

Such a dust sensor is installed in, for example, an air conditioning system to sense the concentration and size of the dust contained in the air to control the operation of the air conditioning system, so that the contaminated air is properly cleaned.

Such dust sensors include a method using light scattering, a gas sensing method, and a triboelectric method.

Particularly, as shown in FIG. 6, in the dust detection sensor using the light scattering, the light from the light emitting portion 2 such as an LED is transmitted to the light receiving portion 3 through the lens 3 in the sensing portion 1 When the light is irradiated, the dust particles rise by the heat generated by the heater 5 located at the lower part of the sensor, and when the upward dust particles pass through the sensing part 1, the light is scattered in proportion to the dust size. The magnitude and magnitude of the sensed and output signal will sense the concentration and size of the dust.

However, since the conventional dust detecting sensor using the above-described light scattering sensor detects all the dusts in the air, for example, large dust, small dust, and fine dust into the sensing portion, the sensing portion is exposed to dust of all sizes, There is a problem of being weak.

Particularly, there has been a problem that dust of all sizes enters into the sensing unit, accuracy of dust sensing is reduced, and large dust larger than PM 10, which is a main cause of the contamination of the sensing unit, flows into the sensing unit. As a result, it is necessary to frequently clean the sensing unit every time the sensing unit is deteriorated or the accuracy of the sensing unit deteriorates. As a result, the sensing accuracy of the sensing unit becomes inaccurate as time elapses.

Patent Document 1: Open Patent No. 10-2005-0072359 Patent Document 2: Registration No. 10-1188437 Patent Document 3: Registration No. 10-1103910

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a cascade impactor for separating fine dust in intake air by a cascade impactor, The accuracy of detection of the fine dust is improved and the contamination of the sensing part is prevented.

According to the present invention, there is provided an air conditioner comprising: a sensor housing having an air inlet, an air outlet, and a fan for sucking air into the air outlet; A dust separation inducing part for separating dust in the intake air between the air inlet and the air outlet of the sensor housing by at least two branching passages according to size; A dust collecting unit for sensing dust passing through the branch flow path of the dust separation inducing unit, a light emitting unit for irradiating light to both sides of the space where the dust passes, and a light receiving unit for receiving light scattered by dust, And a dust detecting unit for detecting the dust.

The dust separating guide portion of the present invention is divided into a first branch passage directly connected to the air inlet and a large dust passage, a second branch passage branched from the side of the first branch passage and passing a small dust, and a second branch passage branched from the side of the second branch passage And the third branch passage through which the fine dust passes is branched and formed.

In the present invention, the hole of the third branch passage is formed to have a width larger than that of the hole of the second branch passage.

A first inclined portion for branching-inducing air and a second inclined portion for branching and guiding air between the third branch flow path and the second branch flow path are formed between the first branch flow path and the second branch flow path, Feature.

According to the present invention, fine dust in the intake air is separated and guided by a cascade impactor method, and is sensed by the sensing unit, so that the sensing unit is not exposed to dust of all sizes but accuracy of fine dust detection is improved. It is unnecessary to clean the sensor unit and the like, and the reliability of the sensor unit can be improved by the detection accuracy of the sensor unit even after a long period of use.

1 is an external perspective view of a sensor device of the present invention.
Fig. 2 is a side view of Fig. 1; Fig.
3 is a sectional structural view of the sensor device of the present invention.
4 is a cross-sectional view showing the operation structure of the sensor device of the present invention.
5 is a conceptual view showing an internal structure and an operation structure of the sensor device of the present invention.
6 is a configuration diagram showing a conventional sensor device;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the sensor device for fine dust detection according to the present invention comprises a sensor housing 10, a dust separation inducing part 20, and a dust sensing part 30.

The sensor housing 10 is provided with an air inlet 11 and an air outlet 12 and a fan 15 for sucking air into the air outlet 12.

The fine dust guide portion 20 is configured to separate and guide the dust in the intake air between the air inlet 11 and the air outlet 12 of the sensor housing 10 by at least two or more branching passages.

This is formed between the air inlet 11 and the air outlet 12 of the sensor housing 10 and is connected directly to the air inlet 11 to form a first branch passage 21 through which a large dust passes, The second branch passage 22 branched from the side and passing through the small dust and the third branch passage 23 branched from the side of the second branch flow passage and passing the fine dust are branched to separate large dust, small dust and fine dust And a cascade impactor method is applied.

At this time, it is preferable that the hole 23a of the third branch passage is formed to be larger than the hole 22a of the second branch passage. The hole width, length, etc. of the second and third flow paths may be variously formed You can do it.

A first inclined portion 25 is formed between the first branch passage 21 and the second branch passage 22 so that air is branched from the first branch passage 21 and the third branch passage 22 And a second inclined portion 26 for branching and guiding air.

The dust detecting unit 30 detects the dust passing through the branch flow path of the dust separating and guiding unit 20 by size and includes a light emitting unit 31 for emitting light to both sides of the space 35 through which the dust passes, And the magnitude and magnitude of the dust are detected through the magnitude and vibration of the signal output by the scattered light by the light receiving section 32 receiving the scattered light by the lens 33 through the lens 33. [

Particularly, in the present invention, the dust detecting unit 30 is connected to the third branch passage 23 to detect the concentration and the size of fine dust. The first branch passage 21 or the second branch passage 23, It is also possible to change the design so as to detect the concentration and size of large dust or small dust.

Hereinafter, the operation and operation of the present invention will be described.

First, the fan 15 located in the air outlet 12 of the sensor housing 10 is driven to suck and discharge air from the air inlet 11 to the air outlet 12.

As described above, the air introduced into the air inlet 11 of the sensor housing 10 includes dust of all sizes, and the dust is separated from the dust separation inducing part 20 separately.

More specifically, large dusts, small dusts, and fine dusts contained in air passing through the first branch passage 21 through the air inlet 11 continue to pass through the first branch passage 21 , The small first dust and fine dust are branched and guided through the second branch passage 22 formed at the side of the first branch passage 21.

The small dust contained in the air passing through the second branch passage 22 and the small dust in the fine dust continue to pass through the second branch passage 22 and the fine dust is branched again laterally of the second branch passage 22 And is branched and guided through the third branch passage 23.

At this time, a first inclined portion 25 is formed between the first branch passage 21 and the second branch passage 22 to divide air from the first branch passage 21 to the second branch passage 22 And a second inclined portion 26 is formed between the second branch flow passage 22 and the third branch flow passage 23 so that the second branch flow passage 22 is provided with the third branch flow passage 23 And the air and the dust flow branched into the air flow and the air flow.

The hole 23a of the third branch passage is formed to have a width larger than that of the hole 22a of the second branch passage to smoothly induce branching of air and fine dust through the third branch passage 23 .

The air introduced through the air inlet 11 is supplied to the first, second and third flow paths 21, 22, and 23 by a cascade impactor system so that large dust, small dust, The fine dust is separated and discharged.

The fine dust guided to the third branch passage (23) senses fine dust in the dust sensing part (30).

This is because when the light emitted from the light emitting portion 31 is irradiated with the LED light, the LED light is scattered by the fine dust passing through the space portion 35 and is detected by the light receiving portion 32 through the lens 33 and is proportional to the intensity of the scattered light The size and vibrations of the output signal and the size and the size of the fine dust are detected.

Therefore, according to the present invention, the fine dust in the intake air is separated and guided by the cascade impactor method, and is sensed by the sensing part, so that the sensing part is not exposed to dust of all sizes but accuracy of fine dust detection is improved, Large dust larger than PM 10, which is a main cause of contamination, is prevented from entering the sensor portion.

Particularly, according to the present invention, dust in the intake air can be separated into dusts of various sizes such as PM 1, PM 2.5, PM 4 and PM 10 according to the cascade impactor method and the air flow amount of the fan, For example, since the sensing unit is connected to the first and second flow paths rather than to the third branch flow path, it is possible to design the sensing unit according to the size of the dust. Also, And the degree of modification of the simple design as such falls within the scope of the present invention.

10: sensor housing 11: air inlet
12: air outlet 15: fan
20: dust separation inducing part 21:
22: second branch passage 22a, 23a: hole
23: third branch passage 25: first inclined portion
26: second inclined portion 30: dust detecting portion
31: light emitting portion 32: light receiving portion
33: Lens 35:

Claims (4)

A sensor housing 10 having an air inlet 11 and an air outlet 12, and a fan 15 for sucking air into the air outlet 12;
A dust separation inducing part 20 for separating dust in the intake air between the air inlet 11 and the air outlet 12 of the sensor housing 10 by at least two branched flow paths,
A light emitting portion 31 for emitting light to both sides of the space portion 35 through which the dust passes, and a light scattering portion for scattering light by dust are received through the lens 33 And a dust sensing unit (30) for sensing the size of the dust by the light receiving unit (32).
The method according to claim 1,
The dust separating guide portion 20 is connected directly to the air inlet 11 and includes a first branch passage 21 through which large dust passes and a second branch passage 22 branched from the side of the first branch passage and passing small dust, And a third branch passage (23) branched from the side of the second branch flow passage and passing fine dust is branched.
3. The method of claim 2,
And the hole (23a) of the third branch passage is formed to have a width larger than the hole (22a) of the second branch passage.
3. The method of claim 2,
A first inclined portion 25 for introducing air between the first branch passage 21 and the second branch passage 22 and a second inclined portion 25 for introducing air between the second branch passage 22 and the third branch passage 23, And a second inclined portion (26) for guiding the diaphragm to branch.
KR1020160019066A 2016-02-18 2016-02-18 Sensor device for sensing fine dust KR20170097391A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190043507A (en) * 2017-08-18 2019-04-26 순천향대학교 산학협력단 measuring apparatus for suspended particulates
KR20190050045A (en) 2017-11-02 2019-05-10 주식회사 에프에스티 Dust sensor with a shutter
KR20190057772A (en) * 2017-11-20 2019-05-29 주식회사 히타치엘지 데이터 스토리지 코리아 Dust sensor
KR20200026378A (en) * 2018-08-30 2020-03-11 한국기계연구원 Apparatus for measuring concentration of dust
KR20200079810A (en) * 2018-12-26 2020-07-06 김창영 Apparatus and system for evaluating dust removal performance of road dust cleaning vehicles
KR102221369B1 (en) * 2019-08-21 2021-02-26 암페놀센싱코리아 유한회사 Fine dust detection device with temperature detection function inside the vehicle
KR20210065661A (en) * 2019-11-27 2021-06-04 한국산업기술대학교산학협력단 Portable fine dust sensor using surface acoustic wave sensor
CN112930472A (en) * 2018-10-31 2021-06-08 株式会社电装 PM sensor
KR102322937B1 (en) * 2020-05-20 2021-11-08 한상현 Dust sensor for vehicles
KR102328863B1 (en) * 2020-05-20 2021-11-22 한상현 Dust sensor for vehicles
KR20210153975A (en) * 2020-06-11 2021-12-20 주식회사 원진일렉트로닉스 Dust measuring apparatus for preventing contamination of the sensor by dust
KR20230064148A (en) * 2021-11-03 2023-05-10 주식회사 제이에스테크 Vehicle fine dust detection sensor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190043507A (en) * 2017-08-18 2019-04-26 순천향대학교 산학협력단 measuring apparatus for suspended particulates
KR20190050045A (en) 2017-11-02 2019-05-10 주식회사 에프에스티 Dust sensor with a shutter
KR20190057772A (en) * 2017-11-20 2019-05-29 주식회사 히타치엘지 데이터 스토리지 코리아 Dust sensor
KR20200026378A (en) * 2018-08-30 2020-03-11 한국기계연구원 Apparatus for measuring concentration of dust
CN112930472A (en) * 2018-10-31 2021-06-08 株式会社电装 PM sensor
KR20200079810A (en) * 2018-12-26 2020-07-06 김창영 Apparatus and system for evaluating dust removal performance of road dust cleaning vehicles
KR102221369B1 (en) * 2019-08-21 2021-02-26 암페놀센싱코리아 유한회사 Fine dust detection device with temperature detection function inside the vehicle
KR20210065661A (en) * 2019-11-27 2021-06-04 한국산업기술대학교산학협력단 Portable fine dust sensor using surface acoustic wave sensor
KR102322937B1 (en) * 2020-05-20 2021-11-08 한상현 Dust sensor for vehicles
KR102328863B1 (en) * 2020-05-20 2021-11-22 한상현 Dust sensor for vehicles
KR20210153975A (en) * 2020-06-11 2021-12-20 주식회사 원진일렉트로닉스 Dust measuring apparatus for preventing contamination of the sensor by dust
KR20230064148A (en) * 2021-11-03 2023-05-10 주식회사 제이에스테크 Vehicle fine dust detection sensor

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