EP3771769A1 - Générateur de vapeur comportant une chambre de vapeur et un trou de dosage disposés à proximité d'une partie arrière de la chambre de vapeur - Google Patents

Générateur de vapeur comportant une chambre de vapeur et un trou de dosage disposés à proximité d'une partie arrière de la chambre de vapeur Download PDF

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Publication number
EP3771769A1
EP3771769A1 EP19189012.8A EP19189012A EP3771769A1 EP 3771769 A1 EP3771769 A1 EP 3771769A1 EP 19189012 A EP19189012 A EP 19189012A EP 3771769 A1 EP3771769 A1 EP 3771769A1
Authority
EP
European Patent Office
Prior art keywords
steam
chamber
steam generator
steam chamber
generator
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP19189012.8A
Other languages
German (de)
English (en)
Inventor
Zhifeng XU (Wilson)
Kok Wah Ma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to EP19189012.8A priority Critical patent/EP3771769A1/fr
Priority to KR1020227006585A priority patent/KR20220038764A/ko
Priority to PCT/EP2020/070496 priority patent/WO2021018659A1/fr
Priority to CN202080054888.0A priority patent/CN114222887B/zh
Priority to EP20742262.7A priority patent/EP4004268A1/fr
Publication of EP3771769A1 publication Critical patent/EP3771769A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F87/00Apparatus for moistening or otherwise conditioning the article to be ironed or pressed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/28Methods of steam generation characterised by form of heating method in boilers heated electrically
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F73/00Apparatus for smoothing or removing creases from garments or other textile articles by formers, cores, stretchers, or internal frames, with the application of heat or steam 
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00Component parts or details of steam boilers
    • F22B37/02Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/36Arrangements for sheathing or casing boilers
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/40Steam generating arrangements

Definitions

  • the invention relates to a steam generator, in particular to a steam generator for a garment steamer.
  • the invention may be used, for example, in the field of garment care.
  • the steam/water path also called steam channel
  • steam channel is normally designed as a labyrinth, and is used to extend the path where water is evaporated and to increase the contact surface and time for maximizing evaporation.
  • the steam channel is also used to guide the flow of steam up to reaching the steam outlets of the steam chamber.
  • the dosing hole for dosing water and/or steam into such a steam generator is located near the front portion of the steam chamber, relatively close to the steam vents to extend the length of the steam channel.
  • the steam channel is shaped such that evaporated steam first travels along the steam channel in direction of a rear portion of the steam chamber, then travels back in direction of the front portion of the steam chamber, where steam will exit the steam chamber via some steam vents.
  • the steam chamber is closed with a separate cover.
  • the steam chamber and the cover are usually assembled via a mechanical male/female assembly, for example by using ribs made on the upper part of the steam chamber tightly cooperating with grooves stamped on the cover.
  • Some studs elements may also additionally be used to strengthen the assembly, for example studs extending upwards from internal walls of the steam chamber, which are cooperating tightly with holes made in the cover.
  • the steam chamber and the cover are then pressed against each other to create mechanical sealing.
  • a gasket extending along those peripheral walls or internal vertical walls defining the steam channel, may additionally be used to further improve the sealing.
  • sealing paste may also be used on the mechanical male/female assembly sealing to further improve the water tightness.
  • FIG.1A depicts a first view of a steam generator 100 according to the prior art
  • Fig.1B depicts a second view of a steam generator 100 as depicted in Fig. 1
  • Fig.1C depicts an internal view of a steam generator 100 as depicted in Fig.1 .
  • the steam generator 100 comprises a steam chamber 101 for generating steam.
  • the steam chamber 101 extends between a front portion FP and a rear portion RP of the steam chamber 101. At least one steam outlet 102 is arranged at the front portion FP and receives steam from the steam chamber 101.
  • the steam generator 100 also comprises a heating element 103 for heating the steam chamber 101.
  • the steam generator 100 also comprises a cover 104 adapted to take a closed position for closing the steam chamber 101, as illustrated in Fig.1B .
  • the steam generator 100 also comprises a dosing hole 105 arranged in the cover 104, for receiving water and/or steam from outside the steam generator 100.
  • the dosing hole 105 is arranged at proximity of the front portion FP when the cover 104 is in the closed position.
  • the steam generator 100 also comprises a steam channel 106 extending between the dosing hole 105 and the steam outlet 102.
  • a gasket G1 is arranged between internal vertical walls of the steam channel 106, and the cover.
  • Fig.1C illustrates in dotted lines the back and forth steam path between the dosing point and the steam outlets 102.
  • the sealing function is compromised. This may happen for example when internal pressure has partially deformed the cover where the sealing was initially made, or when the gasket gets deteriorated over time resulting in a certain porosity or permeability.
  • the sealing function is compromised, some water droplets in the area where is arranged the dosing hole, so relatively close to the steam outlets, may directly be pushed across the internal walls forming the steam channel at the proximity of the steam outlets, and thus exit the steam outlets before being evaporated. This will cause spitting at the exit of the steam chamber. The user experience will be affected, because water droplets will be spread on the garment being treated.
  • This invention provides a new design to overcome above-mentioned problems.
  • the steam generator according to the invention comprises:
  • arranging the dosing hole at proximity of the rear portion of the steam chamber means that the most energy absorbing area is around this rear portion. As a result, if the steam chamber is energized uniformly, the coolest point of the steam chamber will be around this rear portion. This also means that the front portion of the steam chamber will keep at a relatively higher temperature, which will further prevent any spitting problem that could be caused by condensation at the steam outlets.
  • Fig.2A depicts a first (exploded) view of a steam generator 200 according to the invention
  • Fig.2B depicts a second (assembled) view of a steam generator as depicted in Fig.2A .
  • the steam generator 200 comprises a steam chamber 201 for generating steam.
  • the steam chamber 201 extends between a front portion FP and a rear portion RP.
  • the steam generator 200 also comprises at least one steam outlet 202 arranged at the front portion FP and receiving steam from the steam chamber 201.
  • the steam generator 200 also comprises a heating element 203 for heating the steam chamber 201.
  • the steam generator 200 also comprises a cover 204 adapted to take a closed position for closing the steam chamber 201. This closed position is depicted in Fig.2B .
  • the steam generator 200 also comprises a dosing hole 205 arranged in the cover 204, for receiving water and/or steam from outside said steam generator 200.
  • the dosing hole 205 is arranged at proximity of the rear portion RP when the cover 204 is in said closed position, as illustrated in Fig.2B .
  • the front portion FP corresponds to the vertical wall arranged at the front part of the steam chamber 201.
  • the rear portion RP corresponds to the vertical wall arranged at the rear part of the steam chamber 201.
  • the dosing hole 205 is arranged along a longitudinal symmetrical axis (AA) of the steam chamber 201.
  • AA longitudinal symmetrical axis
  • the steam chamber 201 extends along the longitudinal symmetrical axis (AA) between the rear portion RP and the front portion FP.
  • the aperture of the dosing hole 205 shall be at least 5 mm in diameter or 20 mm2 in area with a minimum dimension of at least 3 mm, as stipulated in paragraph 22 of IEC IEC60335-2-85 standard.
  • the steam chamber 201 further comprises a steam channel 206 extending between the dosing hole 205 and the at least one steam outlet 202.
  • the steam channel 206 comprises at least two walls arranged substantially perpendicular to the longitudinal symmetrical axis (AA). This embodiment will be further described along with FIG.2C .
  • substantially perpendicular refers to an angle in the range 80-100 degrees. In other words, said at least two walls are substantially parallel compared to each other.
  • each of two given consecutive walls taken among said at least two walls are arranged to define a steam passage on an opposite side compared to the other wall.
  • the steam chamber 201 further comprises a first additional wall arranged between said at least one steam outlet 202 and the wall taken among said at least two walls being the closest to the front portion FP:
  • the first additional wall comprises a single steam passage in its middle part. This single steam passage improves the steam distribution towards the at least one steam outlets 202. This embodiment will be further described along with FIG.2D .
  • the first additional wall in addition to a steam passage in its middle part, also comprises steam passages on the left and on the right of said steam passage being in the middle part. Those steam passages on the left and on the right allow a smooth steam flow, so that any carried scale in the steam flow will be easily flushed out. This embodiment will be further described along with FIG.2E .
  • the steam chamber 201 further comprises a second additional wall arranged in front the steam passage of said first additional wall.
  • the second additional wall comprises two steam passages on its lateral sides. This second additional wall acts as a front barrier which is used to divert the steam flow to the sides. This contributes reducing the risk of water spitting. This embodiment will be further described along with FIG.2G .
  • the dosing hole 205 is preferably arranged in the cover 204 between the rear portion RP and the wall taken among said at least two walls which is the closest to the rear portion RP.
  • the at least two walls are also arranged further away in direction of the front portion FP.
  • a gasket G2 is arranged between the steam chamber 201 and the cover 204.
  • the gasket G2 extends over (part of) the top part of internal walls defining the steam channel 206.
  • the gasket G2 may also extend along the peripheral walls of the steam chamber 201, as illustrated in FIG.2A
  • Fig.2C depicts a first embodiment of a steam generator according to the invention.
  • the number of the at least two walls is two:
  • the first wall W1 is dimensioned such that it does not extend completely to the right side of the steam chamber 201, so that a first steam passage SP1 is formed between the right extremity of the first wall W1 and the right lateral wall of the steam chamber 201.
  • the second wall W4 is dimensioned such that it does not extend completely to the left side of the steam chamber 201, so that a second steam passage SP4 is formed between the left extremity of the second wall W4 and the left lateral wall of the steam chamber 201.
  • the first wall W1 and the second wall W4 define a single S-shape for the steam channel 206.
  • the steam flow is illustrated by dotted lines starting from the dosing hole 205.
  • the steam follows a single S-shape up to reaching and exiting the at least one steam outlets 202.
  • the number of steam outlets is seven.
  • Fig.2D depicts a second embodiment of a steam generator according to the invention.
  • This embodiment is based on the embodiment of Fig.2C .
  • the steam channel 206 further comprises a first additional wall W5 arranged between the at least one steam outlet 202, and the wall which is the closest to the front portion FP, corresponding to the second wall W4 in that example.
  • the first additional wall W5 is arranged to define a single steam passage SP5 in its middle part.
  • the first additional wall W5 is substantially parallel to the first wall W1 and to second wall W4.
  • the steam passage SP5 extends completely to the bottom part of the steam chamber 201.
  • the steam passage SP5 has a width of at least 3mm.
  • Fig.2E depicts a variant of the embodiment depicted in Fig.2D .
  • the first additional wall W5 also comprises:
  • the steam passages SP5L and SP5R have a width of at least 3mm.
  • the steam passage SP5L and the steam passage SP5R do not extend completely to the bottom part of the steam chamber 201. Instead, the steam passage SP5L and the steam passage SP5R define a step having a certain height HI having a value smaller than an inside height H2 of the steam chamber 201, as illustrated in the cross-sectional view BB of Fig.2F .
  • the central steam passage SP5 can also have similar step.
  • Fig.2G depicts a third embodiment of a steam generator according to the invention. This embodiment is based on the embodiment of Fig.2D .
  • the steam channel 206 further comprises a second additional wall W6 arranged in front the single steam passage of the first additional wall W5.
  • the second additional wall W6 is arranged to define two steam passages (SP61, SP62) on its lateral sides.
  • a first steam passage SP61 is formed between the left extremity of the second additional wall W6 and the left lateral wall of the steam chamber 201.
  • a second steam passage SP62 is formed between the right extremity of the second additional wall W6 and the right lateral wall of the steam chamber 201.
  • the second additional wall W6 is substantially parallel to the first additional wall W5.
  • Fig.2H depicts a fourth embodiment of a steam generator according to the invention.
  • This embodiment is based on the embodiment of Fig.2C .
  • the number of the at least two walls is four.
  • the steam channel 206 further comprises a third wall W2 and a fourth wall W3 which are both arranged between the first wall W1 and the second wall W4.
  • the third wall W2 is dimensioned such that it does not extend completely to the left side of the steam chamber 201, so that a third steam passage SP2 is formed between the left extremity of the third wall W2 and the left lateral wall of the steam chamber 201.
  • the fourth wall W3 is dimensioned such that it does not extend completely to the right side of the steam chamber 201, so that a fourth steam passage SP3 is formed between the right extremity of the fourth wall W3 and the right lateral wall of the steam chamber 201.
  • the first wall W1 and the third wall W2 define a single S-shape portion for the steam channel 206
  • the fourth wall W3 and the second wall W4 define a single S-shape portion for the steam channel 206.
  • the four walls (W1, W2, W3, W4) define a double S-shape for the steam channel 206.
  • the double S-shape for the steam channel 206 further increases the length of the steam channel, so this overall improves the evaporation efficiency of the steam generator.
  • each of the steam passage SP1, SP2, SP3 or SP4 defines a surface in the range [20;200] mm2.
  • Fig.2I depicts a fifth embodiment of a steam generator according to the invention. This embodiment is based on the embodiment of Fig.2H . In addition, the first additional wall W5 has been arranged similarly as in Fig.2D .
  • Fig.2J depicts a sixth embodiment of a steam generator according to the invention, This embodiment is based on the embodiment of Fig.2I .
  • the second additional wall W6 has been arranged similarly as in Fig.2G .
  • Fig.3 depicts a seventh embodiment of a steam generator according to the invention
  • the heating element 203 is a tubular heating element extending over the bottom surface of the steam chamber 201 by defining a nested double-loop shape.
  • the heating element 203 comprises a resistor to which an electrical source is supplied.
  • the tubular heating element with nested double-loop shape according to the invention allows a more uniform temperature distribution to the steam chamber 201.
  • a larger surface of the steam chamber 201 can be heated up evenly.
  • the nested double-loop shape for the heating element 203 is arranged underneath the steam chamber 201 surface and extends over at least 30% of the surface area of steam chamber 201 (calculated as the ratio between the projected area of the heating element to the projected area of the steam chamber surface).
  • This nested double-loop shape for the heating element 203 allows a relatively larger surface covered by the heating element.
  • the linear length of the nested double-loop shape for the heating element 203 is in the range [250; 330] mm, compared to known tubular heating element having a U-shape having a linear length in the range [130; 230] mm.
  • this nested double-loop shape for the heating element 203 also helps to elongate the length of the heating element 203, which helps to lower down the heater tube power density, thus improve the reliability and extend the life time.
  • Fig.4 depicts a handheld steamer 401 implementing a steam generator 200 according to the invention.
  • the steam generator 200 is encased in the body of the handheld steamer 401.
  • the handheld steamer 401 comprises a soleplate 402 placed at a front end of the handheld steamer.
  • the steam outlet(s) 202 pass through the soleplate 402 in order to spray steam over a garment 403.
  • the handheld steamer 401 is used to iron a garment 403 being in vertical position.
  • the handheld steamer 401 could also be used to iron a garment 403 being in horizontal or inclined position.
  • the handheld steamer 401 comprises a water tank 404 connected to a water pump 405 via a first pipe 406.
  • the water pump 405 is connected via a second pipe 407 to the dosing hole 205 of the steam generator 200.
  • the soleplate 402 is made of a metallic material and is connected to the steam generator 200, so that the heat of the steam generator 200 is transferred by conduction to the soleplate 402 in order to improve the treatment of garment 403.
  • the handheld steamer 401 is power supplied by electrical cable 408.
  • Fig.5 depicts a stand steamer 501 implementing a steam generator 200 according to the invention.
  • the stand steamer 501 comprises a stand 502 in which are arranged a water supply 503 for supplying water to a steam chamber 504, for example via an electrical water pump 505.
  • the steam chamber 504 is heated by heating element 506.
  • Steam generated by the steam chamber 504 is carried via a hose cord 507 to a steamer head 508.
  • the steamer head 508 is represented bigger than in reality, for sake of clarity.
  • the stand 502 may also comprise a pole 509 for resting the steamer head 508.
  • the steamer head 508 comprises a steam chamber 200 according to the invention. Steam received from the hose cord 507 enters the steam chamber 200 by the dosing hole 205, and is re-heated inside the steam chamber 200. Remaining water droplets that would be in this incoming flow of steam are thus evaporated in the steam chamber 200. The re-heated steam then exits the steam chamber 200 at the steam outlets 202 opening in a soleplate 513 arranged at a front end of the steamer head 508. Steam is applied on the textile (i.e. garment) 512 via steam outlet(s) 202. The soleplate 513 can be heated by the heating element 203.
  • the stand steamer 501 has the advantage that steam exiting the steam vents 11 does not contain water droplets.
  • a control unit 510 allows controlling the pumping rate of pump 505, the electrical power supplied to the heating elements 506 and 203.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Devices For Medical Bathing And Washing (AREA)
EP19189012.8A 2019-07-30 2019-07-30 Générateur de vapeur comportant une chambre de vapeur et un trou de dosage disposés à proximité d'une partie arrière de la chambre de vapeur Withdrawn EP3771769A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19189012.8A EP3771769A1 (fr) 2019-07-30 2019-07-30 Générateur de vapeur comportant une chambre de vapeur et un trou de dosage disposés à proximité d'une partie arrière de la chambre de vapeur
KR1020227006585A KR20220038764A (ko) 2019-07-30 2020-07-21 스팀 챔버 및 스팀 챔버의 후방 부분에 근접하여 배열된 투입 구멍을 갖는 스팀 발생기
PCT/EP2020/070496 WO2021018659A1 (fr) 2019-07-30 2020-07-21 Générateur de vapeur avec chambre à vapeur et trou de dosage disposé à proximité d'une partie arrière de la chambre à vapeur
CN202080054888.0A CN114222887B (zh) 2019-07-30 2020-07-21 具有蒸汽室和布置在蒸汽室后部附近的配量孔的蒸汽发生器
EP20742262.7A EP4004268A1 (fr) 2019-07-30 2020-07-21 Générateur de vapeur avec chambre à vapeur et trou de dosage disposé à proximité d'une partie arrière de la chambre à vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19189012.8A EP3771769A1 (fr) 2019-07-30 2019-07-30 Générateur de vapeur comportant une chambre de vapeur et un trou de dosage disposés à proximité d'une partie arrière de la chambre de vapeur

Publications (1)

Publication Number Publication Date
EP3771769A1 true EP3771769A1 (fr) 2021-02-03

Family

ID=67513340

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19189012.8A Withdrawn EP3771769A1 (fr) 2019-07-30 2019-07-30 Générateur de vapeur comportant une chambre de vapeur et un trou de dosage disposés à proximité d'une partie arrière de la chambre de vapeur
EP20742262.7A Pending EP4004268A1 (fr) 2019-07-30 2020-07-21 Générateur de vapeur avec chambre à vapeur et trou de dosage disposé à proximité d'une partie arrière de la chambre à vapeur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20742262.7A Pending EP4004268A1 (fr) 2019-07-30 2020-07-21 Générateur de vapeur avec chambre à vapeur et trou de dosage disposé à proximité d'une partie arrière de la chambre à vapeur

Country Status (4)

Country Link
EP (2) EP3771769A1 (fr)
KR (1) KR20220038764A (fr)
CN (1) CN114222887B (fr)
WO (1) WO2021018659A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12000083B2 (en) * 2021-09-16 2024-06-04 Shenzhen Pukaiyu Technology Co., Ltd. Garment steamer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998924A (en) * 1961-05-05 1961-09-05 Steamaster Co Inc Steam gun
US3805425A (en) * 1973-01-26 1974-04-23 Rowenta Werke Gmbh Brush devices
DE202015105749U1 (de) * 2014-08-28 2015-11-11 Koninklijke Philips N.V. Dampferzeuger mit Dichtung
WO2015180980A1 (fr) * 2014-05-30 2015-12-03 Koninklijke Philips N.V. Tête d'appareil vaporiseur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000223248A (ja) * 1999-01-27 2000-08-11 Sharp Corp 電気発熱体
RU2689078C2 (ru) * 2014-09-17 2019-05-23 Конинклейке Филипс Н.В. Паровое устройство
KR102013850B1 (ko) * 2017-02-01 2019-08-23 엘지전자 주식회사 스팀발생장치 및 이를 포함하는 조리기기
CN208491841U (zh) * 2017-09-29 2019-02-15 浙江苏泊尔家电制造有限公司 发热盘组件及具有其的煎烤机
CN109652970B (zh) * 2017-10-12 2020-05-08 美的集团股份有限公司 衣物护理机烫头及具有其的衣物护理机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998924A (en) * 1961-05-05 1961-09-05 Steamaster Co Inc Steam gun
US3805425A (en) * 1973-01-26 1974-04-23 Rowenta Werke Gmbh Brush devices
WO2015180980A1 (fr) * 2014-05-30 2015-12-03 Koninklijke Philips N.V. Tête d'appareil vaporiseur
DE202015105749U1 (de) * 2014-08-28 2015-11-11 Koninklijke Philips N.V. Dampferzeuger mit Dichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12000083B2 (en) * 2021-09-16 2024-06-04 Shenzhen Pukaiyu Technology Co., Ltd. Garment steamer

Also Published As

Publication number Publication date
WO2021018659A1 (fr) 2021-02-04
EP4004268A1 (fr) 2022-06-01
CN114222887B (zh) 2024-04-19
CN114222887A (zh) 2022-03-22
KR20220038764A (ko) 2022-03-29

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