KR20170115913A - Automatic Ventilation apparatus using in-outside air quality monitoring device - Google Patents

Automatic Ventilation apparatus using in-outside air quality monitoring device Download PDF

Info

Publication number
KR20170115913A
KR20170115913A KR1020160043803A KR20160043803A KR20170115913A KR 20170115913 A KR20170115913 A KR 20170115913A KR 1020160043803 A KR1020160043803 A KR 1020160043803A KR 20160043803 A KR20160043803 A KR 20160043803A KR 20170115913 A KR20170115913 A KR 20170115913A
Authority
KR
South Korea
Prior art keywords
air quality
indoor
sensor
outdoor
control signal
Prior art date
Application number
KR1020160043803A
Other languages
Korean (ko)
Inventor
김우현
고주연
하현옥
오정현
김연미
Original Assignee
(주)공존연구소
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)공존연구소 filed Critical (주)공존연구소
Priority to KR1020160043803A priority Critical patent/KR20170115913A/en
Publication of KR20170115913A publication Critical patent/KR20170115913A/en

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/0001Control or safety arrangements for ventilation
    • F24F11/0017
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/50Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56Remote control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/0001Control or safety arrangements for ventilation
    • F24F2011/0002Control or safety arrangements for ventilation for admittance of outside air
    • F24F2011/0091
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/50Air quality properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00Details or features not otherwise provided for
    • F24F2221/20Details or features not otherwise provided for mounted in or close to a window
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)
  • Ventilation (AREA)

Abstract

본 발명은 실내외 공기질을 측정하여, 사용자가 임의로 설정한 공기질 기준을 초과하는 경우 자동으로 환기장치를 가동시키는 자동환기 시스템 및 이를 이용한 환기방법에 관한 것이다. The present invention relates to an automatic ventilation system for automatically activating a ventilator when indoor air quality is measured and an air quality standard set by a user is exceeded, and a ventilation method using the same.

Figure pat00001
Figure pat00001

Description

실내외 공기질 측정기를 이용한 IoT 자동환기장치{Automatic Ventilation apparatus using in-outside air quality monitoring device}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automatic ventilation apparatus using an indoor air quality measurement device,

본 발명은 실내외 공기질을 측정 후 비교하여 사용자가 임의로 설정한 공기질 기준을 초과하는 경우 자동으로 환기장치를 가동 시키는 자동환기 시스템 및 이를 이용한 환기방법에 관한 것으로, 사물인터넷(IoT, Internet of Things) 기술을 접목하여 원격모니터링과 제어가 동시에 이뤄지는 시스템을 구축한다. 또한 실외용 측정장비의 방수방진 성능을 확보하고 사용장소에 따른 센서 종류 변경이 가능하도록 모듈형 설계를 하며 창호에 탈착이 가능한 외형 설계로 설치비용을 감소시킬 수 있는 장치에 대한 것이다. The present invention relates to an automatic ventilation system for automatically activating a ventilator when the air quality of the indoor air exceeds the air quality standard set by a user after comparing the indoor air quality, and a ventilation method using the same. To build a system that enables simultaneous remote monitoring and control. In addition, the present invention relates to a device capable of securing waterproof and dustproof performance of an outdoor measurement device, modular design so that the sensor type can be changed according to the place of use, and installation cost by an external design capable of being detached from a window.

최근 황사, 미세먼지가 심각해 지면서 실내외 공기가 건강에 미치는 영향에 대해서는 관심이 높아지고 있으며, 환기에 대한 중요성이 더욱 커지고 있는 것이 현실이다.In recent years, as dust and fine dust have become serious, interest in indoor and outdoor air health has been increasing, and ventilation is getting more and more important.

하지만 일반 가정에서는 별도의 공조시설이나 환기시설을 구비하지 않고 있는 것이 일반적이고, 최근 실내 공기 상태에 따라 자동으로 환기를 하는 환기시스템이 도입되어 사용되고 있다. However, in general households, it is common that they do not have separate air conditioning facilities or ventilation facilities, and ventilation systems which automatically ventilate according to the indoor air condition have been introduced and used.

그러나 기존의 환기시스템은 감지센서와 제어부 일체형으로 설치되어 센서에서 측정된 공기의 질은 실질적으로 사용자 주변의 공기와 상이할 수 있으며, 사용자 주변의 공기 오염도를 측정하는 것이 아니므로 실내 공기 질을 유지하는데 어려움이 있었다. However, existing ventilation system is integrated with sensor and control unit so that the air quality measured by the sensor can be substantially different from the air around the user and does not measure air pollution around the user, .

또한 기존 제품은 센서 교체가 불가능하므로, 부가적인 요소를 측정하기 위해서는 별도의 설비를 도입해야 하고, 창호의 모양에 관계 없이 동일한 사이즈나 형태로 설치되므로 과도한 설치 공사가 필요한 경우가 있어 과도한 비용이 소요되는 문제가 있다.In addition, since the existing products can not be replaced with sensors, it is necessary to install additional equipment to measure additional elements and it is installed in the same size or shape irrespective of the shape of the window, so that excessive installation work is required, There is a problem.

본 발명은 상기와 같은 종래기술의 문제점을 해소하기 위하여 안출된 것을, 시공 및 유지보수가 용이하며 공기질을 감지하여 자동으로 환기시키는 환기시스템 및 이를 위한 환기방법의 제공을 목적으로 한다.SUMMARY OF THE INVENTION It is an object of the present invention to provide a ventilation system which is easy to install and maintain and which automatically detects air quality and ventilates, and a ventilation method therefor.

실내외 공기질을 감지하는 감지센서(110);A detection sensor 110 for detecting indoor and outdoor air quality;

제어신호에 따라 작동하는 구동부(210, 215);Driving units 210 and 215 operating according to a control signal;

상기 기준값을 벗어나면 창호형 송풍기로 제어신호를 송출하는 통신부(310 );A communication unit 310 for transmitting a control signal to the window type blower when the reference value is out of the predetermined range;

공기질 상태를 보여주고, 가동상태를 보여주는 모니터링 디스플레이(410);A monitoring display (410) showing the air quality status and showing the operating status;

를 구비하는 것을 특징으로 한다. And a control unit.

한편, 상기와 같은 목적을 달성하기 위하여 본 발명의 자동환기방법은 실내외에 부착된 센서가 공기질을 측정하는 단계;According to another aspect of the present invention, there is provided an automatic ventilation method comprising:

실내외 공기질을 비교하여 오염물질의 농도에 따라 기준값을 벗어나면 무선통신 방식으로 다수의 송풍 환기장치로 제어신호를 송신하는 단계;Comparing the indoor and outdoor air qualities and transmitting a control signal to a plurality of blower ventilators in a wireless communication mode when the concentration of pollutants is out of the reference value;

제어신호를 수신한 송풍 환기장치가 구동부를 구동시키는 단계; 및 일정시간 경과 후 다수의 환기장치가 환기팬 구동을 중지시키는 단계;로 이루어지는 것을 특징으로 한다Driving the driving unit by the fan ventilator receiving the control signal; And stopping ventilation fan driving by a plurality of ventilation devices after a predetermined time elapses

상기와 같은 본 발명에 의하면 별도의 배선이 필요없으며, 송풍 환기장치는 기존 창문에 설치할 수 있으므로 시공과 유지보수가 용이하다는 효과가 있다. According to the present invention as described above, there is no need for additional wiring, and the blower ventilator can be installed in an existing window, so that it is easy to construct and maintain.

또한 실외공기질 계측장치는 모듈형으로 설계하여 사용장소와 용도에 맞게 센서종류를 교환할 수 있으며, 방수방진 소재와 기구설계를 통하여 외부 환경에 노출되는 실외에 부착된 상태에서도 작동이 원할하게 된다. In addition, the outdoor air quality measuring device is designed as a modular type, and it is possible to exchange the sensor type according to the use place and purpose. Also, through the waterproof and dustproof material and the mechanical design, it is possible to operate even when it is attached to the outdoor environment exposed to the external environment.

도 1은 본 발명의 실시예에 따른 송풍장치에 대해 개략적으로 도시한 도면이다.
도 2는 본 발명의 실시예에 따른 자동환기 방법을 나타내는 순서도이다.
도 3은 본 발명의 실시예에 따른 자동환기 시스템의 감지센서, 환기장치 등의 전체적인 배치도이다.
FIG. 1 is a schematic view of a blower according to an embodiment of the present invention.
2 is a flowchart showing an automatic ventilation method according to an embodiment of the present invention.
3 is an overall layout diagram of a sensing sensor, a ventilator, and the like of an automatic ventilation system according to an embodiment of the present invention.

본 발명은 다양한 변경을 가할 수 있고 여러가지 실시예를 가질 수 있는 바, 특정 실시예들을 도면에 예시하여 상세하게 설명한다. 그러나 이는 본 발명을 특정한 실시 형태에 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. The present invention is capable of various modifications and various embodiments, and specific embodiments will be described in detail with reference to the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all changes, equivalents, and alternatives falling within the spirit and scope of the invention.

제1, 제2 등과 같이 서수를 포함하는 용어는 다양한 구성요소들을 설명하는데 사용될 수 있지만, 상기 구성요소들은 상기 용어들에 의해 한정되지는 않는다. 상기 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로만 사용된다. Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

예를 들어, 본 발명의 권리 범위를 벗어나지 않으면서 제1 구성요소는 제2구성요소로 명명될 수 있고, 유사하게 제2구성요소도 제1구성요소로 명명될 수 있다. 및/또는 이라는 용어는 복수의 관련된 기재된 항목들의 조합 또는 복수의 관련된 기재된 항목들 중의 어느 항목을 포함한다. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

다르게 정의되지 않는 한, 기술적이거나 과학적인 용어를 포함해서 여기서 사용되는 모든 용어들은 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 일반적으로 이해되는 것과 동일한 의미를 가지고 있다. 일반적으로 사용되는 사전에 정의되어 있는 것과 같은 용어들은 관련 기술의 문맥상 가지는 의미와 일치하는 의미를 가지는 것으로 해석되어야 하며, 본 출원에서 명백하게 정의하지 않는 한, 이상적이거나 과도하게 형식적인 의미로 해석되지 않는다. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

이하 첨부 도면을 참조하여 본 발명 및 본 발명의 바람직한 실시예를 상세하게 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention and preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1 내지 도3을 참조하여 설명하면, 본 실시예에 따른 공기질 측정기를 이용한 자동환기 시스템은 실내외 공기질을 감지하는 감지센서(110), 제어신호에 따라 작동하는 구동부(210, 215), 상기 기준값을 벗어나면 창호형 송풍기로 제어신호를 송출하는 통신부(310), 공기질 상태를 보여주고, 가동상태를 보여주는 모니터링 디스플레이(410)를 포함하여 이루어진다. 1 to 3, the automatic ventilation system using the air quality measuring apparatus according to the present embodiment includes a sensing sensor 110 for sensing indoor / outdoor air quality, driving units 210 and 215 operating according to a control signal, A communication unit 310 for sending a control signal to the window type blower when the air conditioner is out of the air conditioner, and a monitoring display 410 for showing the air condition and showing the operating state.

감지센서(110)는 실내외 벽면에 설치되어 실내외 공기질을 측정하여 센서데이터를 전송하고 사용자가 설정한 기준값과 비교하여 구동부의 작동 여부를 무선통신장치(310)로 전송하여 실내로 외부 공기의 유입이 필요한 경우 환기팬(215)을 가동시키고, 실내 공기를 외부로 배출시키기 위하여 팬(210)을 가동시킴으로서 적정한 공기질을 유지시킨다. The detection sensor 110 is installed on the wall of the indoor / outdoor unit, measures outdoor air quality, transmits sensor data, compares it with a reference value set by the user, and transmits the operation of the driving unit to the wireless communication device 310, If necessary, the ventilation fan 215 is operated and the fan 210 is operated to discharge indoor air to the outside, thereby maintaining proper air quality.

구동부는 창틀에 고정시키는 형태(220)로, 서버로부터 작동명령을 송수신하는 통신모듈(31)과 공기질 데이터를 모니터링할 수 있는 디스플레이(410)를 포함한다. The driving unit includes a communication module 31 for transmitting and receiving an operation command from a server and a display 410 for monitoring air quality data.

한편, 본 발명의 실시예에 따른 공기질 측정기는 모듈형으로 설계하여 설치장소와 용도별로 센서의 종류를 변경함으로써 사용자 맞춤형으로 제작 가능하므로 비용절감의 효과가 있다.Meanwhile, the air quality measuring device according to the embodiment of the present invention is modularly designed and can be manufactured in a user-customized manner by changing the type of the sensor for each installation place and usage, thereby reducing the cost.

110: 공기질 감지센서 210: 내부환기fan
215: 외부환기fan 220: 고정장치
310: 무선통신부 410: 모니터링 디스플레이
110: air quality sensor 210: internal ventilation fan
215: external ventilation fan 220: fixing device
310: wireless communication unit 410: monitoring display

Claims (3)

실내외 공기질을 감지하는 센서부, 실내외 공기질을 비교하고 계측값을 분석하여 기준값을 벗어나면 창호형 송풍기로 제어신호를 송출하는 통신부, 제어신호에 따라 작동하는 구동부, 실내외 공기질을 측정하는 센서부로 구성된 자동환기 시스템A sensor part for detecting indoor and outdoor air quality, a communication part for comparing indoor and outdoor air quality and analyzing measured values and sending out a control signal to a window type blower when the measured value is out of the standard value, a driving part for operating according to a control signal, Ventilation system 제 1항에 있어서,
상기 센서부는 실내외에 설치되며, 장소별 용도별 센서의 종류를 변경할 수 있는 모듈형 설계를 보유하고, 외부환경에 노출됨에도 정상 작동할 수 있도록 기구 설계를 포함한 센서부.
The method according to claim 1,
The sensor unit has a modular design that can be installed in an indoor or outdoor environment and can change the type of sensor for each place, and a sensor unit including a mechanical design so that it can be normally operated even when exposed to an external environment.
제 1항에 있어서,
상기 구동부는 실내외 공기질 비교값에 따라 상대적으로 쾌적한 공기를 실내로 유입하는 환기팬과 실내 공기를 외부로 유출시키는 양방향 팬을 구비한 구동부.
The method according to claim 1,
Wherein the driving unit includes a ventilating fan for introducing relatively comfortable air into the room according to the indoor air quality comparison value, and a bidirectional fan for discharging indoor air to the outside.
KR1020160043803A 2016-04-10 2016-04-10 Automatic Ventilation apparatus using in-outside air quality monitoring device KR20170115913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160043803A KR20170115913A (en) 2016-04-10 2016-04-10 Automatic Ventilation apparatus using in-outside air quality monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160043803A KR20170115913A (en) 2016-04-10 2016-04-10 Automatic Ventilation apparatus using in-outside air quality monitoring device

Publications (1)

Publication Number Publication Date
KR20170115913A true KR20170115913A (en) 2017-10-18

Family

ID=60296729

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160043803A KR20170115913A (en) 2016-04-10 2016-04-10 Automatic Ventilation apparatus using in-outside air quality monitoring device

Country Status (1)

Country Link
KR (1) KR20170115913A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200031313A (en) * 2018-09-14 2020-03-24 부산대학교 산학협력단 Iot-based fine dust reduction System and Method
US20200348038A1 (en) 2019-07-12 2020-11-05 Johnson Controls Technology Company Hvac system design and operational tool for building infection control
KR20210010288A (en) * 2019-07-18 2021-01-27 김우진 Indoor and outdoor air quality single sensor monitoring device
US11274842B2 (en) 2019-07-12 2022-03-15 Johnson Controls Tyco IP Holdings LLP Systems and methods for optimizing ventilation, filtration, and conditioning schemes for buildings
US11714393B2 (en) 2019-07-12 2023-08-01 Johnson Controls Tyco IP Holdings LLP Building control system with load curtailment optimization
US11761660B2 (en) 2019-01-30 2023-09-19 Johnson Controls Tyco IP Holdings LLP Building control system with feedback and feedforward total energy flow compensation
US11960261B2 (en) 2019-07-12 2024-04-16 Johnson Controls Tyco IP Holdings LLP HVAC system with sustainability and emissions controls

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200031313A (en) * 2018-09-14 2020-03-24 부산대학교 산학협력단 Iot-based fine dust reduction System and Method
US11761660B2 (en) 2019-01-30 2023-09-19 Johnson Controls Tyco IP Holdings LLP Building control system with feedback and feedforward total energy flow compensation
US20200348038A1 (en) 2019-07-12 2020-11-05 Johnson Controls Technology Company Hvac system design and operational tool for building infection control
US11131473B2 (en) 2019-07-12 2021-09-28 Johnson Controls Tyco IP Holdings LLP HVAC system design and operational tool for building infection control
US11269306B2 (en) 2019-07-12 2022-03-08 Johnson Controls Tyco IP Holdings LLP HVAC system with building infection control
US11274842B2 (en) 2019-07-12 2022-03-15 Johnson Controls Tyco IP Holdings LLP Systems and methods for optimizing ventilation, filtration, and conditioning schemes for buildings
US11714393B2 (en) 2019-07-12 2023-08-01 Johnson Controls Tyco IP Holdings LLP Building control system with load curtailment optimization
US11913655B2 (en) 2019-07-12 2024-02-27 Johnson Controls Tyco IP Holdings LLP Systems and methods for optimizing ventilation, filtration, and conditioning schemes for buildings
US11960261B2 (en) 2019-07-12 2024-04-16 Johnson Controls Tyco IP Holdings LLP HVAC system with sustainability and emissions controls
KR20210010288A (en) * 2019-07-18 2021-01-27 김우진 Indoor and outdoor air quality single sensor monitoring device

Similar Documents

Publication Publication Date Title
KR20170115913A (en) Automatic Ventilation apparatus using in-outside air quality monitoring device
US11635222B2 (en) Damper fault detection
KR100813679B1 (en) Air qaulity sensing and control system for school
US9869482B2 (en) Ventilation system, ventilation method, ventilation control device, and non-transitory computer-readable recording medium
JP5058245B2 (en) Air conditioning system
KR101108543B1 (en) Interior environment system of individually controlling the equipment for adjusting the surroundings
CN102121740A (en) Air conditioner control system, control method and air conditioner
US20050024216A1 (en) Method and apparatus for alarm verification in a ventilation system
WO2016051733A1 (en) Ventilation assisting device and program
WO2018189925A1 (en) Air conditioner, control method for same, and control program
KR101128090B1 (en) Monitoring system for interior environments using the combination sensor modules
KR101640065B1 (en) Smart air care system and control method thereof
KR101931912B1 (en) A ventilation system with changing air flow path
WO2020066335A1 (en) Air conditioning system and application program
CN105717964A (en) Indoor environment monitoring equipment
JP2013007544A (en) Sensor terminal, sensor network system, and control method of sensor terminal
US11624525B2 (en) Low-power HVAC remote controller and method of operating the same
JP2008121911A (en) Free-access underfloor air-conditioning state measuring device
KR100812119B1 (en) Room air temperature control system
EP3859221B1 (en) Air conditioning system and application program
CN201652701U (en) Air conditioner controlling system and air conditioner
KR20210020484A (en) Air conditioner and controlling method thereof
KR102107651B1 (en) A system for management of an air-conditioning unit
KR20200079138A (en) Real time power saving system
KR20160004512A (en) The System and Method for Air quality managing

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E601 Decision to refuse application