baber/WOPTO huggingface dataset:
Patent KR-102230895-B1 (KR)
Title: Manufacturing apparatus using ejector for plate shaped ODF
Inventor: CHANG SEOK HOON
IPC: A61K9/70
Filed: 2020-06-19
Granted: 2021-03-24
Abstract: The present invention relates to an apparatus for manufacturing an oral dissolving film (ODF) for front coating using an injector. According to the present invention, a single ejection port of the front side of an ejector extends in a width direction and at the same time, a raw material is ejected through the single ejection port so that an ejection amount is significantly increased by increasing the area of the ejection outlet in comparison with the width of the ejector, thereby maximizing production. Instead of a complicated and expensive slot die, the raw material is ejected by using a simple and inexpensive ejector, so that manufacturing costs can be significantly reduced and time and cost consumption due to equipment failure and inspection can be effectively reduced due to the simple structure. the mass deviation in the width direction of the raw material ejected through a hydraulic control unit is effectively reduced, so that product completeness and manufacturing precision can be increased. The apparatus comprises a base film supply part, an ejection unit, a drying unit, a slitting unit, a cutting unit, a base film recovery unit, a separation unit, and a packaging unit.
Patent KR-102368891-B1 (KR)
IPC: F16J13/22
Filed: 2020-06-22
Granted: 2022-03-02
Abstract: 미리 설정된 이벤트에 따라서 산소 챔버로 공급된 공기를 자동을 배출하는 고압 산소 치료 시스템이 개시된다. 개시된 고압 산소 치료 시스템은 전원부; 산소 챔버; 상기 산소 챔버로 공급되는 공기에 의해 팽창하는 에어백을 이용하여, 상기 산소 챔버의 도어를 개폐시키는 도어 개페 장치; 상기 산소 챔버의 제1배기구에 연결되는 제1배기관; 및 미리 설정된 이벤트에 따라서, 상기 산소 챔버로 공급된 공기를, 상기 제1배기관을 통해 배출시키는 제1솔레노이드 밸브를 포함한다.
Patent KR-102344275-B1 (KR)
Title: Frame unit for inflatable tent
Inventor: LEE HEE JAE
IPC: E04H15/20
Filed: 2020-06-23
Granted: 2021-12-29
Abstract: The present invention relates to a unit frame for an inflatable tent, which can be interconnected in multiple pieces so as to be able to easily form a relatively large internal space and be structurally strong. The unit frame of the present invention includes: a pair of lower tubes (10) provided upward from the ground; a pair of upper tubes (20) integrally connected to the upper end of the lower tube (10) and connected to the upper end thereof; and a bent part (30) formed at a connection part between the lower tube (10) and the upper tube (20).
Patent KR-102386963-B1 (KR)
Title: Uv 경화 장치
IPC: G02F1/13
Filed: 2020-06-29
Granted: 2022-04-15
Abstract: UV 경화 장치가 개시된다. 본 발명의 일 실시 예에 따른 UV 경화 장치는, 로딩 플랫폼과 적어도 둘 이상의 UV 경화 플랫폼, 언로딩 플랫폼으로 이루어진 일 방향의 이동 경로를 따라 패널이 이동 가능하도록 상기 이동 경로의 일 측에 마련된 트랜스퍼 유닛; 상기 로딩 플랫폼 상에서 상기 패널을 위치 정렬시키는 얼라인 유닛; 및 상기 패널 상에 적층 형성된 액체 경화형 접착층을 경화하기 위해 상기 UV 경화 플랫폼 상에 마련된 UV 경화 유닛을 포함할 수 있다.
Patent KR-102268101-B1 (KR)
Title: Interior simulation model that allows interior element selection and removal
Inventor: PARK SAE BYEOL
IPC: A63H33/04
Filed: 2020-07-06
Granted: 2021-06-22
Abstract: According to the present invention, provided is an interior simulation model comprising a base frame including two or more walls and a floor and a wall frame detachably coupled to the base frame. According to another feature of the present invention, the wall includes a first coupling protrusion formed on one surface of the wall and capable of being coupled to the wall frame. The wall frame comprises a first coupling groove formed on the side of the wall frame, inserted into the first coupling protrusion and coupled to the wall.
Patent KR-102369055-B1 (KR)
IPC: H01L29/78
Filed: 2020-07-07
Granted: 2022-03-02
Abstract: 본 발명의 일 관점에 의한 전력 반도체 소자는 실리콘 카바이드(SiC)의 반도체층과, 상기 반도체층의 일부 상의 게이트 절연층과, 상기 게이트 절연층 상의 게이트 전극층과, 전하의 수직 이동 경로를 제공하도록 상기 반도체층에 형성되고, 상기 게이트 전극층 하부에 배치된 적어도 하나의 돌출 부분을 포함하고, 제 1 도전형을 갖는 드리프트 영역과, 상기 게이트 전극층 하부의 상기 반도체층에 상기 드리프트 영역의 상기 적어도 하나의 돌출 부분과 접하게 형성되는 제 1 웰 영역 및 상기 게이트 전극층 외측의 상기 반도체층에 형성되고 상기 제 1 웰 영역과 연결된 제 2 웰 영역을 포함하고, 제 2 도전형을 갖는 웰 영역과, 상기 제 1 웰 영역 상의 상기 반도체층에 형성된 제 1 소오스 영역 및 상기 제 2 웰 영역 상의 상기 반도체층에 형성되고 상기 제 1 소오스 영역과 연결된 제 2 소오스 영역을 포함하고, 제 1 도전형을 갖는 소오스 영역과, 상기 드리프트 영역의 상기 적어도 하나의 돌출 부분 및 상기 제 1 소오스 영역 사이의 상기 반도체층에 형성되는 채널 영역과, 상기 제 2 웰 영역 내 상기 드리프트 영역과 접하도록 형성되고, 제 2 도전형의 불순물이 상기 웰 영역보다 더 고농도로 도핑되어 형성된, 아발란치 유도 영역을 포함을 포함한다.
Patent KR-102207776-B1 (KR)
Inventor: CHOI DOO YOUNG
IPC: E01F8/00
Filed: 2020-07-09
Granted: 2021-01-26
Abstract: The present invention relates to a soundproof facility with a lightweight circular pole having an integrated soundproof panel, wherein a curved frame is integrally assembled on both sides of a soundproof panel to quickly and easily perform coupling work with a circular pole. According to the present invention, the soundproof facility with a lightweight circular pole having an integrated soundproof panel comprises: a circular pole (10) having a circular cross-sectional shape to be vertically erected; a curved frame (20) having a predetermined curved surface shape to stick to the outer circumferential surface of one side of the circular pole (10); a fastening bolt (30) installed through the circular pole (10) for fixation of the curved frame (20); a soundproof panel frame (40) fastened and fixed on the curved frame (20) to support soundproof glass (60); and a glass fixing part (50) fastened to one side of the soundproof panel frame (40) for prevention of separation of the soundproof glass (60).
Patent KR-102376893-B1 (KR)
IPC: A47L15/02
Filed: 2020-07-16
Granted: 2022-03-21
Abstract: 본 발명은 다수의 식판이 겹쳐진 상태에서 세척조를 상하좌우로 흔들어 세척하는 것이 아니라 서로 겹쳐진 다수의 식판의 간격이 주기적으로 증가 또는 감소되도록 함으로써 물의 표면장력으로 인해 식판 사이에 발생되는 계면장력이 해제됨과 동시에 식판 사이사이로 세척수가 유입됨에 따라 식판의 표면에 묻은 음식찌꺼기 등이 효율적으로 제거될 수 있도록 한 계면장력 해제식 식판세척장치에 관한 것이다. 
본 발명의 바람직한 일 실시예에 따른 계면장력 해제식 식판세척장치는 상부에는 다수의 식판이 겹쳐진 상태로 투입되는 수조가 구비되고 상기 수조의 내부 상측에는 최전방 식판을 지지하는 식판지지축이 구비되는 본체와, 상기 본체의 일측 상부에 일정 각도범위로 회동가능하게 설치되고 중앙에는 최후방 식판의 배면을 주기적으로 타격하는 식판타격대가 하향돌출 형성되는 회전축과, 상기 식판타격대에 구비되고 최후방 식판을 흡착한 후 후방으로 잡아당겨 식판 사이의 계면장력을 해제하는 제 1 흡착패드와, 상기 본체에 구비되고 상기 회전축과 상기 식판타격대를 일정각도 범위로 왕복회동시키는 전동기구를 포함한다.
Patent KR-102448448-B1 (KR)
IPC: A41D13/11
Filed: 2020-07-20
Granted: 2022-10-04
Abstract: 본 발명은 소금으로 처리한 안면 여과식 마스크에 관한 것으로서, 특히 바이러스와 미세먼지를 효과적으로 여과할 수 있는 마스크 및 그 제조방법에 관한 것이다.
Patent KR-102426124-B1 (KR)
IPC: G06Q20/10
Filed: 2020-07-24
Granted: 2022-07-26
Abstract: 본 발명은 블록 체인에 기반한 개인 정보 운용 방법, 장치 및 시스템에 관한 것이다.  본 발명의 일 실시예에서는블록체인 서비스의 회원 가입을 위한 개인 정보를 블록체인 플랫폼 서버에 제공하는 단계; 상기 블록체인 서비스를 위한 사용자 블록체인 계정 및 사용자 블록체인 계좌 정보를 수신하는 단계; 상기 개인 정보에 대한 열람 권한을 상기 블록체인 플랫폼 서버를 통해 적어도 하나의 제휴사 회원 관리 서버에게 부여하는 단계; 및 상기 제휴사 회원 관리 서버에서 상기 개인 정보가 이용되는 경우, 상기 개인 정보의 이용에 대한 보상을 상기 제휴사 회원 관리 서버로부터 상기 사용자 블록체인 계좌로 제공받는 단계를 포함하며, 상기 개인 정보는 다른 사용자의 개인 정보와 함께 제 1 블록체인의 블록 내에 저장되며, 상기 개인 정보의 이용 내력은 상기 다른 사용자의 개인 정보 이용 내력과 함께 제 2 블록체인의 블록 내에 저장되는 블록체인에 기반한 사용자 장치의 개인 정보 운용 방법이 제공될 수 있다.
Patent KR-102221766-B1 (KR)
Title: System for managing lawn of golf club based on environment information bigdata
Inventor: KIM SUK HUI
IPC: G06Q50/10
Filed: 2020-07-24
Granted: 2021-03-02
Abstract: The present invention relates to a golf club lawn management system, and more specifically, to a system for managing lawn of a golf club based on environment information big data, which checks soil condition, which is the basis for the growth of turf in a golf course field, in real time, acquires climate-related information, and then analyzes the optimal amount of turf management agents such as moisture, fertilizer, and pesticides required for turf growth in a timely manner and automatically supplying the same, and thus field conditions can be managed simply and better. To this end, the present invention includes: a soil condition measurement module for measuring at least one or more pieces of soil data of temperature and humidity of the golf course field soil; an environmental information collection module for collecting soil data through Internet of Thing (IoT) communication with the soil condition measurement module and simultaneously collecting climate data from the outside; an environmental information DB for storing and managing environmental information including the soil data and climate data collected by the environmental information collection module; an environmental information analysis module for analyzing environmental conditions necessary for lawn management through the environmental information of the environmental information DB; a turf management agent spraying means for spraying at least one turf management agent of water, fertilizer, and pesticide on the golf course field; and a spraying means control module for controlling the spraying means based on the environmental conditions required for lawn management analyzed by the environmental information analysis module.
Patent KR-102319508-B1 (KR)
Title: Biomarker for Identification of Camel-origin MERS Coronavirus Species Prone to Spreading in Human Networks and uses thereof
Inventor: OH JONG WON
IPC: C12Q1/70
Filed: 2020-07-27
Granted: 2021-10-28
Abstract: The present invention relates to a biomarker for identifying or detecting the Middle East respiratory syndrome coronavirus (MERS-CoV) and, more specifically, to a technology using a specific protein variant of the MERS-CoV and a gene sequence encoding the variant as a biomarker for identifying or detecting the human-infected MERS-CoV. When a user uses a variant of the MERS-CoV ORF4b protein as a biomarker, the user can identify or detect the MERS-CoV that easily infects the human body, thereby preventing the infection in advance.
Patent KR-102202951-B1 (KR)
Inventor: KIM KYUNG SIK
IPC: B30B9/12
Filed: 2020-08-07
Granted: 2021-01-14
Abstract: The present invention relates to a solid-liquid separation device and, more specifically, to a solid-liquid separation device having an automatic cleaning function, which comprises: a main body for separating solids and sewage from water content sludge introduced through an opening and discharging the same; a cake discharge unit disposed on a front end of the main body and transferring, to a cake collection unit, the solids discharged in the form of cake from the main body; and a cleaning means configured to store the sewage discharged from the main body and to discharge the stored sewage to the opening to clean the inside of the main body. Therefore, when treating sludge with high water content contained in food waste, wastewater, and the like and discharging the same separately into sewage and solids, water content contained in the solids can be greatly reduced, thereby increasing the amount of solid-liquid separation of the sludge. Also, the solid-liquid separation device is configured to automatically clean the inside of a device by reusing discharged sewage so as to be hygienically operated. In addition, the solid-liquid separation device is also configured to automatically clean a filtering net through which solids and sewage are separated, so as to prevent deterioration of solid-liquid separation processing capacity due to clogging of the filtering net, thereby always maintaining device efficiency at the highest level.
Patent KR-102323959-B1 (KR)
IPC: B60W20/00
Filed: 2020-09-08
Granted: 2021-11-09
Abstract: The present invention provides a method and system for engine clutch variable hydraulic pressure control for a P2 hybrid electric vehicle, capable of improving fuel efficiency of a vehicle by preventing unnecessary hydraulic pressure loss caused by continuously applying the maximum hydraulic pressure to an engine clutch despite a low engine torque when the engine clutch hydraulic pressure is controlled in the P2-type hybrid vehicle. The method for engine clutch variable hydraulic pressure control for a P2 hybrid electric vehicle comprises the following steps: determining whether a current engine torque is stabilized while driving the vehicle with an engine clutch being fully locked up; calculating, and if it is determined that the engine torque is stabilized, an oil temperature compensation torque is applied according to the oil temperature in the engine clutch and an APS angular velocity compensation torque is applied according to an APS angular velocity based on a currently detected engine torque; calculating a target engine clutch transmission torque by summing the detected current engine torque, the calculated oil temperature compensation torque, and the APS angular velocity compensation torque; and calculating a final target engine clutch hydraulic pressure to be applied to the engine clutch by dividing the calculated target engine clutch transmission torque by a cross-sectional area of the engine clutch.
Patent KR-102501608-B1 (KR)
Title: Integrated operation method for distributed energy resource
Inventor: PARK JUNG SUNG
IPC: G06Q50/06
Filed: 2020-09-14
Granted: 2023-02-21
Abstract: An integrated distribution resource operation method is disclosed. According to the present invention, the integrated distribution resource operation method comprises the following steps of: allowing a power distribution system operation server to perform power distribution network analysis for a power distribution system based on bidding data for power market participation from a distribution resource provider server before a power market date and reviewing whether the bidding data violates distribution network operation constraints; and allowing a power transaction management server to approve bidding of a power market participant of a distribution resource provider according to a review result of the power distribution system operation server to make a contract.
Patent KR-102370790-B1 (KR)
Title: Prediction method for measuring value of environmental sensors
Inventor: YONGSUN CHOI
IPC: G05B23/02
Filed: 2020-09-16
Granted: 2022-03-07
Abstract: A measurement value prediction method of a sensor of the present invention comprises: an inter-sensor relevance index calculation step of calculating, in a defined area, an association relationship for a measurement value between the plurality of sensors; an operation group forming step of forming, in the defined area, an operation group based on the calculated inter-sensor relevance index; a representative sensor determining step of determining, in the defined area, at least one or more representative sensors in each of the operation groups; a sensor control step of controlling, in the defined area, other sensors in the corresponding operation group except for the determined representative sensor in an inactive state; and a measurement value prediction step of replacing, in the defined area, the measurement value of the inactive state sensors with the measurement values measured by the representative sensor. Therefore, the present invention is capable of saving various operating resources such as a bandwidth and the like of a communication network.
Patent KR-102213937-B1 (KR)
Title: Radio communication auxiliary system
Inventor: KIM NAK HEE
IPC: H04B7/155
Filed: 2020-09-17
Granted: 2021-02-08
Abstract: The present invention relates to a wireless communication aid system which allows communication between a basement and a very high story. The wireless communication aid system comprises: at least one main trans repeater arranged on the ground to up-convert or down-convert transceived firefighting wireless signals and managing wireless signals to transmit the firefighting wireless signals and the managing wireless signals; a plurality of terminal trans repeaters arranged on a high story and a basement to up-convert or down-convert transceived firefighting wireless signals and managing wireless signals to transmit the firefighting wireless signals and the managing wireless signals; and a combiner connected to the at least one main trans repeater and the plurality of terminal trans repeaters to combine firefighting wireless signals and managing wireless signals received from the main trans repeater and the plurality of terminal trans repeaters. The main trans repeater or the terminal trans repeater includes: a band pass filter into which a signal is inputted; a first automatic gain switch controller which allows a signal passing through the band pass filter to pass therethrough, and is turned off by a control unit when an input through an antenna is received; an automatic gain controller to lower a signal passing through the first automatic gain switch controller to be amplified by an amplifying unit and passing through the band pass filter; and a second automatic gain switch controller which is turned on by control of an NMS/main control unit when the lowered signal is amplified by the amplifying unit to be inputted.
Patent KR-102222784-B1 (KR)
Title: Nover edoxaban hemi ethane-1,2-disulfonic acid salt monohydrate
Inventor: AN JI HUN
IPC: A61P7/02
Filed: 2020-09-17
Granted: 2021-03-04
Abstract: The present inventors have tried to study a novel salt form that can increase a pharmacological effect by overcoming the low solubility and stability of edoxaban tosylate monohydrate currently on the market. Therefore, water solubility is increased more than 13 times, and edoxaban hemi ethylene disulfonic acid salt hydrate with high stability is developed, wherein edoxaban hemi ethylene disulfonic acid salt hydrate can be used as a composition exhibiting a useful therapeutic effect on thrombotic diseases.
Patent KR-102203936-B1 (KR)
Inventor: PYO HAE YUN
IPC: A63B9/00
Filed: 2020-09-18
Granted: 2021-01-18
Abstract: The present invention relates to a ride that children can use, comprising: a double cylindrical body arranged such that a second circular space is at a higher position than a first circular space while the first circular space and the second circular space are interconnected; a support member connected to the second circular space and coming into contact with the ground to maintain balance; a continuous roof body formed at a higher position than the second circular space and the support member to provide a second layer space; a space moving hole formed on an outer wall of the double cylindrical body such that the second circular space and the second layer space communicate with each other; and a plurality of pole modules provided in the inside of each of the first circular space, the second circular space and the second layer space. According to the present invention, it is possible to utilize a space that is not flat more efficiently.
Patent KR-102454492-B1 (KR)
IPC: D21H23/28
Filed: 2020-09-18
Granted: 2022-10-14
Abstract: 본 발명은 기능성 원지 및 그 제조방법에 관한 것으로, 본 발명에 따르면, 용수에 분산제와 극세사 섬유를 넣고 분산시키는 제1 분산단계; 상기 극세사 섬유가 분산된 용수에 저융착사 섬유 또는 비정전 섬유를 넣고 분산시키는 제2 분산단계; 상기 저융착사 섬유 또는 비정전 섬유가 분산된 용수에 기능성 발수제를 투입하여 분산물을 제조하는 투입단계; 분산물을 성형하여 기능성 원지를 제조하는 제조단계 및 상기 기능성 원지를 건조시키는 건조단계를 포함하는 기능성 원지 제조방법을 제공할 수 있다. 
이에 따라 제조된 기능성 원지를 제조할 수 있다.
Patent KR-102270899-B1 (KR)
Title: Apparatus and Method for Providing Missing Child Search Service based on Face Recognition using Deep-Learning
Inventor: KIM MIN SIK
IPC: H04N7/18
Filed: 2020-10-05
Granted: 2021-06-30
Abstract: Disclosed are a face recognition-based missing child finding service providing apparatus using deep learning and a method thereof. In accordance with an embodiment of the present invention, the method includes the following steps of: registering a first missing child image, and missing child occurrence information including information about a position and a time where and when a child is missing as the missing child is reported from at least one first user terminal; registering a second missing child image, and missing child finding information including information about a position and a time where and when the missing child is found as the finding of the missing child is reported from at least one second user terminal; calculating similarity between face characteristic information extracted based on deep learning from the first and second missing child images; and, if the similarity is no less than a predetermined threshold value, delivering a contact number of the second user terminal and the missing child finding information to the first user terminal, and delivering a contact number of the first user terminal and the missing child occurrence information to the second user terminal. Therefore, the present invention is capable of shortening the time required to find a missing child.
Patent KR-102481512-B1 (KR)
IPC: H04L9/40
Filed: 2020-10-05
Granted: 2022-12-26
Abstract: 레거시 미터기와 스마트 미터기의 공존을 지원하는 자동계량검침방법이 공개된다. 이 방법은, 제1시구간 동안에 스마트 미터기와 통신하여 상기 스마트 미터기의 시리얼번호 중 적어도 일부인 제1데이터를 획득하는 단계, 제2시구간 동안에 레거시 미터기와 통신하여 상기 레거시 미터기의 시리얼번호 중 적어도 일부인 제2데이터를 획득하는 단계, 상기 제1데이터를 포함하는 제1코드를 생성하여 상기 제1코드를 상기 스마트 미터기의 HDLC 주소로서 저장하고, 상기 제2데이터를 포함하는 제2코드를 생성하여 상기 제2코드를 상기 레거시 미터기의 HDLC 주소로서 저장하는 단계, 및 상기 스마트 미터기의 HDLC 주소와 상기 레거시 미터기의 HDLC 주소를 포함하는 HDLC 주소 리스트를 생성하여, 상기 생성된 HDLC 주소 리스트를 포함하는 제1전력선 통신 패킷을 DCU에게 전송하는 단계를 포함한다. 이때, 상기 스마트 미터기는 상기 미터기 측 스마트 모뎀과 상기 제1시구간에 MAC을 이용하는 제1로컬 통신 프로토콜을 이용하여 통신하도록 되어 있고, 상기 레거시 미터기는 상기 미터기 측 스마트 모뎀과 상기 제2시구간에 MAC을 이용하지 않는 제2로컬 통신 프로토콜을 이용하여 통신하도록 되어 있다.
Patent KR-102574493-B1 (KR)
Title: P2p 전력 거래를 위한 계통 이용 수수료 산정 장치 및 방법
IPC: G06Q50/06
Filed: 2020-10-12
Granted: 2023-09-01
Abstract: P2P 전력 거래를 위한 계통 이용 수수료 산정 장치 및 방법이 개시된다. 일 실시예에 따른 P2P 전력 거래를 위한 계통 이용 수수료 산정 장치는, P2P 전력 거래에 사용되는 전력 계통에 대한 입력 데이터를 획득하는 입력 획득부; 조류 해석을 위해 상기 입력 데이터를 기 정의된 포맷으로 가공하는 입력 데이터 가공부; 상기 입력 데이터에 대해 조류 해석이 수행된 결과 데이터를 획득하는 결과 획득부; 및 상기 결과 데이터에 기초하여 상기 P2P 전력 거래에 대한 계통 이용 수수료를 산정하는 수수료 산정부를 포함한다.
Patent KR-102219651-B1 (KR)
Title: exhaust pump
Inventor: JANG KYU LIM
IPC: F04D13/06
Filed: 2020-10-20
Granted: 2021-02-24
Abstract: The present invention relates to a drain pump of a new structure enabling easy maintenance. According to the present invention, a dented groove (11c) through which a power line (24) passes is formed to be dented downward on one side of an upper end of a pipe body (11), and an insertion part (12b) inserted into the dented groove (11c) to cover and seal an upper part of the dented groove (11c) is formed on a lower side of a cover (12), and thus, when the cover (12) is separated for maintaining a pump body (20), the power line (24) is left in the dented groove (11c). In other words, in the case of an existing drain pump, since the power line (24) is fixed to the cover (12), when the cover (12) is separated, the power line (24) is separated from a power supply part, and then, the power line (24) needs to be separated from the cover (12). However, according to the present invention, since the power line (24) passes through the dented groove (11c) formed on the upper side of the pipe body (11), when the cover (12) is separated, the power line (24) can be separated separately from the cover (12) or the pipe body (11). Therefore, the present invention has an advantage of easily maintaining a drain pump.
Patent KR-102267747-B1 (KR)
Inventor: LEE JUN HO
IPC: A62B18/02
Filed: 2020-10-28
Granted: 2021-06-22
Abstract: Disclosed is a breathing apparatus. According to an embodiment of the present invention, the breathing apparatus comprises: a mask worn on a face to correspond to a mouth and including an inhalation hose connected to one side and an exhalation hose connected to the other side; a first oxygen mixing unit connected to the exhalation hose and removing carbon dioxide from discharged air; a second oxygen mixing unit connected to the inhalation hose, storing breathing air, and removing carbon dioxide; an oxygen supply hose connected to the second oxygen mixing unit; an oxygen container coupling part mounted on the oxygen supply hose; an oxygen container detachably coupled to the oxygen container coupling part; and a control unit connecting one side to the first oxygen mixing unit to communicate with the same and connecting the other side to the second oxygen mixing unit and the oxygen supply hose to control the concentration of carbon dioxide and oxygen to be breathable. Accordingly, since oxygen is properly mixed with the exhalation generated by breathing even in a state in which the inflow of external air is blocked, breathing is possible, so that long-term spontaneous breathing is possible, thereby providing an effect of ensuring a user's safety in extreme environments and increasing work efficiency.