WO2011145186A1 - フィルタ目詰まり検出装置 - Google Patents
フィルタ目詰まり検出装置 Download PDFInfo
- Publication number
- WO2011145186A1 WO2011145186A1 PCT/JP2010/058433 JP2010058433W WO2011145186A1 WO 2011145186 A1 WO2011145186 A1 WO 2011145186A1 JP 2010058433 W JP2010058433 W JP 2010058433W WO 2011145186 A1 WO2011145186 A1 WO 2011145186A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- clogging
- cooling air
- cooling
- clogging detection
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 90
- 239000000428 dust Substances 0.000 claims abstract description 20
- 238000010586 diagram Methods 0.000 description 4
- 238000013021 overheating Methods 0.000 description 4
- 239000000112 cooling gas Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20181—Filters; Louvers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/448—Auxiliary equipment or operation thereof controlling filtration by temperature measuring
Definitions
- the present invention relates to a filter clogging detection device that detects clogging of a filter for removing dust floating in cooling air.
- Electronic devices, information processing devices, and the like generally include a heat generating component inside the device casing.
- a heat generating component inside the device casing.
- the temperature inside the housing rises, and electronic components provided inside the housing may deteriorate due to heat.
- a device in which a fan is attached to an apparatus and air inside the casing is forcibly taken in through an intake port provided in the casing to cool the inside of the casing.
- an electronic device that includes a filter at the air inlet in order to remove dust in the air.
- Patent Document 1 a constant driving voltage is applied to a driving motor for rotating a fan, and the number of rotations of the driving motor is measured, thereby clogging the filter.
- An apparatus for detecting is disclosed.
- the filter is clogged, the cooling air flow rate to the housing by the fan is reduced, which means that the rotational load is reduced for the drive motor.
- a constant drive voltage is applied to the drive motor, the rotational speed of the drive motor increases due to a decrease in rotational load. That is, it can be recognized that the filter is clogged when the rotational speed of the drive motor exceeds the reference rotational speed.
- FIG. 1 is a cross-sectional view of a main part of a filter clogging detection device disclosed in Patent Document 2. As shown in FIG.
- the filter clogging detection device disclosed in Patent Document 2 has a cylindrical portion 1 whose central axis is installed in the vertical direction, and can slide inside the cylindrical portion 1 along the central axis. And a filter 2 provided in the above.
- the filter 2 is suspended from the inner wall of the cylindrical portion 1 by using a string spring 3, and a switch 4 such as a micro switch is disposed below the filter 2 in the vertical direction. Accumulation of dust in the filter 2 increases the mass of the filter 2, the string spring 3 is extended, and the filter 2 activates the switch 4 to detect clogging of the filter 2.
- Patent Document 3 discloses a filter clogging detection device in which a mass sensor that detects mass is disposed at a portion that supports the filter 2. When dust accumulates in the filter 2 and the mass of the filter 2 increases and the mass sensor exceeds a predetermined threshold, it is recognized that the filter 2 is clogged.
- Some electronic devices can change the installation direction depending on the specification environment.
- the detection devices disclosed in Patent Document 2 and Patent Document 3 cannot be applied.
- an example of the object of the present invention is to provide a filter clogging detection device capable of detecting clogging of individual filters without being limited by the direction of taking in cooling air.
- one aspect of the present invention is a filter clogging detection device that detects clogging in a filter that prevents dust contained in cooling air that cools a cooling target from passing therethrough.
- a force detector that is disposed at a position in contact with the downstream surface of the filter in the flow direction of the cooling air, detects a force urged by the filter when the cooling air passes through the filter, and a force detector.
- Clogging determination means for determining that clogging has occurred in the filter when the detected value exceeds a predetermined threshold value.
- FIG. 2 is a schematic diagram of an electronic apparatus having a filter clogging detection device according to the first embodiment of the present invention.
- the electronic device is one in which a cooling object 6 is arranged inside a box 5 having a box shape.
- the cooling target 6 include a heat-generating component that generates heat when an electronic device is activated, and an electronic component that easily deteriorates due to heat.
- the housing 5 is formed with an intake port 8 for taking in the cooling air 7 for cooling the cooling target 6 and an exhaust port 9 for discharging the cooling air 7 to the outside of the housing 5.
- the exhaust port 9 is provided with a fan 10 for generating a flow of the cooling air 7.
- the cooling target 6 is cooled by disposing the intake port 8 and the exhaust port 9 so that the flow of the cooling air 7 passes through the cooling target 6.
- the fan 10 does not need to be provided in the exhaust port 9 and may be provided in the housing 5 so as to form a flow of the cooling air 7 from the cooling target 6 toward the exhaust port 9.
- the housing 5 includes a cylindrical portion 1 formed from the air inlet 8 toward the inside of the housing 5, and the flow of the cooling air 7 is formed along the cylindrical portion 1.
- a filter 2 for preventing the dust contained in the cooling air 7 from passing through is provided in the cylindrical portion 1 so as to be slidable along the flow of the cooling air 7.
- the dust contained in the cooling air 7 can be removed by providing the filter 2 in the middle of the flow of the cooling air 7. Further, since the dust is removed before the cooling air 7 flows into the housing 5, the cooling target 6 can be cooled without sending the dust into the housing 5.
- the cylindrical portion 1 is formed in accordance with the shape of the filter 2 and the gap between the filter 2 and the cylindrical portion 1 is small.
- a force detector 11 is fixed at a position of the housing 5 that contacts the surface of the filter 2 on the downstream side in the flow direction of the cooling air 7.
- Examples of the force detector 11 include a strain gauge type load cell that calculates a force from a change in electrical resistance value due to metal strain. When the force P along the flow of the cooling air 7 is urged by the filter 2, the magnitude of the force P can be detected by the force detector 11.
- the filter 2 When the cooling air 7 passes through the filter 2, the filter 2 becomes a flow resistance of the cooling air 7 and a force P is urged to the filter 2.
- the magnitude of the force P varies depending on the roughness of the filter 2, that is, the clogging state.
- the air resistance of the filter 2 is relatively small, and the force P urged from the cooling air 7 to the filter 2 is also relatively small.
- the flow resistance of the filter 2 also increases, and the force P urged from the cooling air 7 to the filter 2 increases.
- the clogged state of the filter 2 can be recognized by detecting the magnitude of the force P urged from the cooling air 7 to the filter 2 using the force detector 11.
- the filter clogging detection apparatus in the first embodiment is provided with clogging determination means 12 for determining the clogging status of the filter 2 from the detection signal detected by the force detector 11.
- the clogging determination unit 12 determines that the filter 2 is clogged when the value detected by the force detector 11 exceeds a predetermined threshold value.
- the predetermined threshold value is a value of the wind pressure received by the filter 2 from the cooling air 7 in a state where the air resistance of the filter 2 increases and the flow rate of the cooling air 7 decreases and the cooling target 6 cannot be sufficiently cooled. is there.
- the predetermined threshold is experimentally obtained in advance and stored in the clogging determination means 12.
- the clogging determination means 12 When the filter 2 is clogged, the clogging determination means 12 performs a countermeasure operation such as sounding an alarm (not shown) or stopping the operation of the heat generating component. It is possible to prompt the operator to replace the filter 2 by sounding an alarm. Further, by stopping the operation of the heat generating component, it is possible to prevent overheating of the electronic device due to clogging of the filter 2.
- a countermeasure operation such as sounding an alarm (not shown) or stopping the operation of the heat generating component. It is possible to prompt the operator to replace the filter 2 by sounding an alarm. Further, by stopping the operation of the heat generating component, it is possible to prevent overheating of the electronic device due to clogging of the filter 2.
- the surface of the filter 2 is not disposed in the horizontal direction, for example, even if the dust-proof surface of the filter 2 is disposed in parallel to the vertical direction,
- the force P urged from the cooling air 7 to the filter 2 can be measured. That is, it is possible to detect clogging of the filter 2 without being limited to the direction in which the cooling air 7 is introduced.
- Embodiment 2 Next, a filter clogging detection apparatus according to the second embodiment of the present invention will be described.
- FIG. 3 is a schematic diagram of an electronic apparatus having a filter clogging detection device according to the second embodiment.
- the filter clogging detection apparatus in the second embodiment includes a fan 10, a filter 2, a force detector 11, and a clogging determination means 12, and is basically the same as the first embodiment. The same configuration.
- a temperature detector 13 is provided upstream of the cooling target 6 in the flow direction of the cooling air 7.
- the temperature detector 13 can detect the temperature of the cooling air 7 before hitting the cooling target 6 (hereinafter referred to as the cooling air temperature T).
- the threshold selection unit 14 that selects the predetermined threshold C used by the clogging determination means 12 from the cooling air temperature T detected by the temperature detector 13. Is provided.
- the cooling object 6 can be sufficiently cooled even if the flow rate of the cooling air 7 is relatively small. As the cooling air temperature T increases, the flow rate of the cooling air 7 necessary for cooling the cooling target 6 increases.
- the flow rate of the cooling air 7 varies depending on the amount of dust accumulated in the filter 2 when the fan 10 is rotating at a constant rotational speed. As the amount of dust accumulated in the filter 2 increases, the flow rate of the cooling air 7 decreases.
- the filter 2 is installed in a state where the amount of dust accumulated in the filter 2 is smaller than when the cooling air temperature T is low. Must be replaced. On the contrary, when the cooling air temperature T is low, the filter 2 can be continuously used even if the amount of accumulated dust in the filter 2 is larger than when the cooling air temperature T is high.
- the replacement frequency of the filter 2 can be reduced by increasing the threshold value C compared to when the cooling air temperature T is high, and the cost of the filter 2 can be suppressed. it can.
- the threshold value C determined by the clogging determination means 12 to be clogged is experimentally determined in advance according to the cooling air temperature T, and a plurality of threshold values C are stored in the threshold selection unit 14. From the temperature detected by the temperature detector 13, the threshold selection unit 14 selects one of the stored thresholds C and uses it for the clogging determination means 12.
- the cost of the filter 2 can be suppressed, and overheating of the electronic device due to clogging of the filter 2 can be suppressed.
- FIG. 3 is a flowchart showing the operation of the filter clogging detection apparatus in the second embodiment.
- step 1 the temperature detector 13 is used to acquire the cooling air temperature T before hitting the cooling target 6, and the threshold selection unit 14 responds to the cooling air temperature T.
- a threshold value C is selected (S2).
- the force P received from the cooling air by the filter 2 at the present time is acquired using the force detector 11 (S3). Furthermore, when the force P at the current time exceeds the threshold value C corresponding to the cooling temperature air T at the current time, the clogging determination means 12 determines that clogging has occurred in the filter 2 (S4), and sounds an alarm, A coping operation such as stopping the operation of the heat generating component is performed (S5). If the filter 2 is not clogged, the process returns to S1 and the cooling air temperature T is acquired again.
- the filter clogging detection device can detect clogging of the filter 2 without being limited to the direction in which the cooling air 7 is introduced. Further, the clogging of the filter 2 can be determined according to the cooling air temperature T, so that overheating of the electronic device can be prevented and the cost of the filter 2 can be suppressed.
- the present invention is a device that has a sealed casing other than the intake and exhaust ports for cooling gas, has a heat source inside the casing, and sucks cooling gas from the outside.
- the present invention can be applied to equipment that requires cleaning of a cooling gas.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
図2は、本発明の第1の実施形態例におけるフィルタ目詰まり検出装置を有する電子機器の模式図である。図2に示すように、電子機器は、箱型形状を有する筐体5の内部に冷却対象6が配設されたものである。冷却対象6としては、電子機器の起動により熱を発生する発熱部品や、熱によって劣化し易い電子部品などが挙げられる。
次に、本発明の第2の実施形態例におけるフィルタ目詰まり検出装置について説明する。
2 フィルタ
3 弦巻バネ
4 スイッチ
5 筐体
6 冷却対象
7 冷却空気
8 吸気口
9 排気口
10 ファン
11 力検出器
12 目詰まり判定手段
13 温度検出器
14 閾値選択部
C 閾値
P 力
T 冷却空気温度
Claims (2)
- 冷却対象を冷却する冷却空気に含まれた塵埃を通過させないためのフィルタにおける目詰まりを検出するフィルタ目詰まり検出装置であって、
筐体の、前記フィルタの前記冷却空気の流れ方向下流側の面に当接する位置に固定され、前記冷却空気が前記フィルタを通過するときに前記フィルタに付勢された力を検出する力検出器と、
前記力検出器で検出された値が所定の閾値を超えたときに前記フィルタに目詰まりが発生したと判定する目詰まり判定手段と、
を備えた、フィルタ目詰まり検出装置。 - 請求項1に記載のフィルタ目詰まり検出装置において、
前記冷却対象に当たる前の前記冷却空気の温度を検出する温度検出器と、
前記目詰まり判定手段が目詰まりと判定する閾値をあらかじめ前記温度に応じて複数記憶しており、前記温度検出器によって検出された温度から前記複数の閾値のうちの一つを選択して前記所定の閾値とする閾値選択部と、
を有する、フィルタ目詰まり検出装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/696,998 US20130055793A1 (en) | 2010-05-19 | 2010-05-19 | Filter clogging detection apparatus |
PCT/JP2010/058433 WO2011145186A1 (ja) | 2010-05-19 | 2010-05-19 | フィルタ目詰まり検出装置 |
JP2012515671A JP5388252B2 (ja) | 2010-05-19 | 2010-05-19 | フィルタ目詰まり検出装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2010/058433 WO2011145186A1 (ja) | 2010-05-19 | 2010-05-19 | フィルタ目詰まり検出装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011145186A1 true WO2011145186A1 (ja) | 2011-11-24 |
Family
ID=44991310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/058433 WO2011145186A1 (ja) | 2010-05-19 | 2010-05-19 | フィルタ目詰まり検出装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130055793A1 (ja) |
JP (1) | JP5388252B2 (ja) |
WO (1) | WO2011145186A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2728986A1 (fr) | 2012-11-06 | 2014-05-07 | Schneider Electric Industries SAS | Surveillance du fonctionnement d'un système de dissipation thermique |
JP2019010638A (ja) * | 2017-05-30 | 2019-01-24 | ゼネラル・エレクトリック・カンパニイ | フィルタの状態に基づく監視をするためのシステムおよび方法 |
WO2023042282A1 (ja) * | 2021-09-15 | 2023-03-23 | シャープNecディスプレイソリューションズ株式会社 | 電子機器及び報知制御方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6323175B2 (ja) * | 2014-05-29 | 2018-05-16 | 富士通株式会社 | 電子機器およびフィルタ装置 |
WO2018075002A1 (en) * | 2016-10-17 | 2018-04-26 | Hewlett-Packard Development Company, L.P. | Filter mesh with incorporated strain gauge |
CN110879118A (zh) * | 2018-09-05 | 2020-03-13 | 宁波方太厨具有限公司 | 一种自动检测滤芯密封性的装置和检测方法 |
CN110967151A (zh) * | 2018-09-29 | 2020-04-07 | 台山市旺春达环保科技有限公司 | 滤芯组件检测装置 |
CN113891613B (zh) * | 2021-08-23 | 2022-07-05 | 荣耀终端有限公司 | 散热装置和散热方法 |
US20230129686A1 (en) * | 2021-10-25 | 2023-04-27 | Carrier Corporation | Systems and methods for membrane blockage detection in gas detectors |
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JPH0661672A (ja) * | 1992-08-05 | 1994-03-04 | Nec Corp | 冷却ファン |
JP2009188040A (ja) * | 2008-02-04 | 2009-08-20 | Seiko Epson Corp | 電気機器及びプロジェクタ |
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JPS49106137A (ja) * | 1973-02-14 | 1974-10-08 | ||
JPS5612093A (en) * | 1979-07-10 | 1981-02-05 | Tokico Ltd | Oil cooled compressor |
JPS6281566U (ja) * | 1985-11-13 | 1987-05-25 | ||
EP0500064B1 (en) * | 1991-02-22 | 1996-11-06 | Smc Kabushiki Kaisha | Method of processing vacuum pressure information in a vacuum unit to provide a failure precognition signal |
JP3418411B2 (ja) * | 1991-09-06 | 2003-06-23 | Smc株式会社 | 真空ユニット |
JP3714926B2 (ja) * | 2002-08-22 | 2005-11-09 | ホーチキ株式会社 | サンプリング管式煙検知器 |
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2010
- 2010-05-19 US US13/696,998 patent/US20130055793A1/en not_active Abandoned
- 2010-05-19 JP JP2012515671A patent/JP5388252B2/ja not_active Expired - Fee Related
- 2010-05-19 WO PCT/JP2010/058433 patent/WO2011145186A1/ja active Application Filing
Patent Citations (2)
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JPH0661672A (ja) * | 1992-08-05 | 1994-03-04 | Nec Corp | 冷却ファン |
JP2009188040A (ja) * | 2008-02-04 | 2009-08-20 | Seiko Epson Corp | 電気機器及びプロジェクタ |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2728986A1 (fr) | 2012-11-06 | 2014-05-07 | Schneider Electric Industries SAS | Surveillance du fonctionnement d'un système de dissipation thermique |
JP2019010638A (ja) * | 2017-05-30 | 2019-01-24 | ゼネラル・エレクトリック・カンパニイ | フィルタの状態に基づく監視をするためのシステムおよび方法 |
JP7337485B2 (ja) | 2017-05-30 | 2023-09-04 | ゼネラル・エレクトリック・カンパニイ | フィルタの状態に基づく監視をするためのシステムおよび方法 |
WO2023042282A1 (ja) * | 2021-09-15 | 2023-03-23 | シャープNecディスプレイソリューションズ株式会社 | 電子機器及び報知制御方法 |
Also Published As
Publication number | Publication date |
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JPWO2011145186A1 (ja) | 2013-07-22 |
JP5388252B2 (ja) | 2014-01-15 |
US20130055793A1 (en) | 2013-03-07 |
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