WO2021075754A1 - Bouilloire électrique et son procédé de fonctionnement - Google Patents

Bouilloire électrique et son procédé de fonctionnement Download PDF

Info

Publication number
WO2021075754A1
WO2021075754A1 PCT/KR2020/013006 KR2020013006W WO2021075754A1 WO 2021075754 A1 WO2021075754 A1 WO 2021075754A1 KR 2020013006 W KR2020013006 W KR 2020013006W WO 2021075754 A1 WO2021075754 A1 WO 2021075754A1
Authority
WO
WIPO (PCT)
Prior art keywords
humidity
heater
threshold value
electric kettle
heating operation
Prior art date
Application number
PCT/KR2020/013006
Other languages
English (en)
Korean (ko)
Inventor
김광록
Original Assignee
엘지전자 주식회사
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 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2021075754A1 publication Critical patent/WO2021075754A1/fr

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/2105—Water-boiling vessels, e.g. kettles electrically heated of the cordless type, i.e. whereby the water vessel can be plugged into an electrically-powered base element
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21058—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water
    • A47J27/21083—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water with variable operating parameters, e.g. temperature or boiling period

Definitions

  • the present invention relates to an electric kettle and a method of operation.
  • Wireless power transmission technology is a technology that wirelessly transfers power between a power source and an electronic device.
  • the wireless power transmission technology allows the battery of the wireless terminal to be charged by simply placing a wireless terminal such as a smartphone or tablet on the wireless charging pad, which is more than a wired charging environment using a wired charging connector. It can provide excellent mobility, convenience and safety. It is attracting attention that it will replace the existing wired power transmission environment in various fields such as electric vehicles, Bluetooth earphones and 3D glasses, various wearable devices, home appliances, furniture, underground facilities, buildings, medical devices, robots, and leisure. have.
  • the wireless power transmission method is also referred to as a contactless power transmission method, a no point of contact power transmission method, or a wireless charging method.
  • the wireless power transmission system includes a wireless power transmission device that supplies electrical energy through a wireless power transmission method, and a wireless power reception that supplies power to a power receiving device such as a battery cell by receiving electrical energy wirelessly supplied from the wireless power transmission device. It can be configured as a device.
  • Wireless power transmission technology is a method of transmitting power through magnetic coupling, a method of transmitting power through a radio frequency (RF), a method of transmitting power through a microwave, and supersonic sound.
  • RF radio frequency
  • microwave a method of transmitting power through a microwave
  • supersonic sound There are various ways such as the way power is transmitted through waves.
  • the magnetic induction method is a method of transmitting energy by using a current induced in the receiving coil due to a magnetic field generated in the transmitting coil battery cell according to the electromagnetic coupling between the transmitting coil and the receiving coil.
  • the magnetic resonance method is similar to the magnetic induction method in that it uses a magnetic field. However, in the magnetic resonance method, resonance occurs when a specific resonance frequency is applied to the coil on the transmitting side and the coil on the receiving side, and as a result, energy is transferred by the phenomenon that the magnetic field is concentrated at both ends of the transmitting side and the receiving side. There is a difference from self-induction.
  • An electric kettle is a device that heats water contained in a body by an electric supply with a heating element such as a heater.
  • An electric kettle to which a wireless power transmission system is applied includes a wireless power receiver that receives power transmitted from the wireless power transmitter, and a heater that heats water inside the body with power from the wireless power receiver.
  • the electric kettle that is connected to the commercial power through the deck through wires and receives power is primarily prevented from overheating with SW using a thermister, and secondly, between the deck and the body.
  • the electric kettle is protected by a thermostat.
  • An object of the present invention is to provide an electric kettle for determining whether or not contents such as water are present using a humidity sensor, and a method of operating the same.
  • the electric kettle includes a body forming a space in which water is accommodated; A heater provided on the body and heating the space; A wireless power receiving device receiving a wireless power signal from a wireless power transmitting device and providing power to the heater; A humidity sensor installed on the body to be exposed to the space of the body; And a controller that determines whether or not contents are present in the space of the body based on the humidity measured by the humidity sensor.
  • the controller may compare the humidity with a first threshold value and stop the heating operation of the heater when the humidity is less than a first threshold value.
  • the controller may compare the humidity and the second threshold value after a predetermined period of time, and maintain the heating operation of the heater when the humidity is greater than the second threshold value.
  • the controller may stop the heating operation of the heater when the humidity is less than or equal to the second threshold.
  • the controller may determine whether the heating operation of the heater is completed, and if the heating operation is not completed, compare the humidity with a second threshold value, and maintain the heating operation of the heater when the humidity is greater than the second threshold value.
  • the first threshold value may be a temperature value determined in the range of 40°C to 60°C.
  • the second threshold value may be a temperature value of 30°C.
  • the predetermined time may be a time period determined in the range of 10 seconds to 30 seconds.
  • the humidity sensor may be installed on the side of the body.
  • a method of operating an electric kettle including a body forming a space in which water is accommodated, a heater heating the space, and a humidity sensor installed on the body to be exposed to the space of the body is heating the heater.
  • comparing the humidity measured by the humidity sensor with a first threshold value comparing the humidity measured by the humidity sensor with a first threshold value; And stopping the heating operation of the heater when the humidity is less than the first threshold value.
  • the method of operating the electric kettle may include comparing the humidity and a second threshold value after a predetermined period of time when the humidity is greater than or equal to a first threshold; And maintaining the heating operation of the heater when the humidity is greater than the second threshold value.
  • the method of operating the electric kettle may further include stopping the heating operation of the heater when the humidity is less than or equal to a second threshold.
  • the operating method of the electric kettle includes determining whether the heating operation of the heater is completed; And returning to comparing the humidity and the second threshold value if the heating operation is not completed.
  • the electric kettle according to the present invention has the following effects.
  • the electric kettle according to an embodiment of the present invention can quickly detect that there is no water in the wireless electric pot.
  • the electric kettle according to an embodiment of the present invention can prevent damage to the container by preventing continued heating when there is no water inside.
  • FIG. 1 is a perspective view of an electric kettle employing a wireless power transmission system according to an embodiment of the present invention.
  • FIG. 2 is a front perspective view of an electric kettle according to an embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of the electric kettle of FIG. 2.
  • FIG. 4 is a cross-sectional view of the lower portion of the electric kettle of FIG. 2.
  • FIG. 5 is a block diagram of an electric kettle according to an embodiment of the present invention.
  • FIG. 6 is a flowchart illustrating a method of operating an electric kettle according to an embodiment of the present invention.
  • FIG. 1 is a perspective view of an electric kettle employing a wireless power transmission system according to an embodiment of the present invention.
  • the electric kettle 100 includes a wireless power receiving device 140 (refer to FIG. 3 ).
  • the wireless power receiver 140 (refer to FIG. 3) of the electric kettle 100 receives power from the wireless power transmitter 200 according to a magnetic induction method.
  • the electromagnetic induction method uses an induction phenomenon between the primary and secondary coils of a transformer and uses a frequency of several MHz, the transmission distance is several mm or less, and the transmission efficiency is about 90% at the transmission distance less than 1 mm. Accordingly, in the case of using the magnetic induction method, the wireless power receiving device 140 and the wireless power transmitting device 200 may each include a coil.
  • the wireless power receiving device 140 of the electric kettle 100 When the coil of the wireless power receiving device 140 of the electric kettle 100 is positioned in the magnetic field range of the wireless power transmitting device 200, a current is induced in the coil of the wireless power receiving device, and accordingly, the wireless power receiving device 140 ) May obtain AC power, convert it into DC power, and supply it to the components of the electric kettle 100.
  • the wireless power transmission method has been described using a magnetic induction method as an example, but a magnetic resonance (MR) method and a long-distance microwave method may be used.
  • FIG. 2 is a front perspective view of an electric kettle according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional view of the electric kettle of FIG. 2.
  • 4 is a cross-sectional view of the lower portion of the electric kettle of FIG. 2.
  • the body 10 may be formed in a cylindrical shape.
  • a heater (not shown) is installed on the lower surface 20 of the body 10. The heater may generate heat by receiving power provided from the wireless power receiving device 140.
  • the handle 40 may be configured to protrude from one side of the body 10.
  • the body 10 may contain contents such as water, and the lower surface 20 of the body 10 may be heated by a heater.
  • the body 10 is composed of an inner body 12 and an outer body 11, and a space is formed between the inner body 12 and the outer body 11, so that the insulation performance is significantly improved compared to the single wall structure. It can have a structure.
  • Both the inner body 12 and the hour body 10 may be formed of the same stainless material, and the outer body 11 forms the exterior of the body 10, and the inner body 12 contains water. It forms a space.
  • the inner body 12 has a smaller diameter than the outer body 11, and thus the inner body 12 may be provided in a form accommodated inside the outer body 11. Accordingly, a space 102 may be formed between the outer body 11 and the inner body 12.
  • the space 102 between the outer body 11 and the inner body 12 an air layer is formed so that heat can be prevented from being directly transferred to the outer body 11, and thus the space 102 is an insulating space. You can also call it (102). In addition, even when the water contained in the inner body 12 is heated and hot, the outer body 11 may maintain a relatively low temperature.
  • the body 10 may be formed by combining the upper and lower ends of the outer body 11 and the inner body 12 formed in a cylindrical shape.
  • the upper and lower ends of the outer body 11 and the inner body 12 may be connected to each other by welding in a superimposed state.
  • portions of the outer body 11 and the inner body 12 except for the upper and lower ends of the outer body 11 and the inner body 12 may be spaced apart from each other by a predetermined interval to have an insulating structure.
  • an outer lower end 13 may be formed at the lower end of the outer body 11.
  • the outer lower end 13 may extend downward to form the lower end of the outer body 11 but may be formed in a stepped shape inward.
  • An inner lower end 14 may be formed at the lower end of the inner body 12.
  • the inner lower end 14 may extend downward to form the lower end of the inner body 12.
  • the inner lower end 14 may be in surface contact with the outer lower end 13.
  • the coil 142 of the wireless power receiving device 140 may be installed in the space between the outer lower end 13 and the inner lower end 14. have.
  • the power transmission efficiency increases. Accordingly, when the coil 142 of the wireless power receiving device 140 is placed on the wireless power transmitting device 200, the outer lower end 13 and the inner lower end 14 close to the coil of the wireless power transmitting device 200 It is placed in the space between.
  • a humidity sensor 110 is installed in the space between the outer lower end 13 and the inner lower end 14.
  • the humidity sensor 110 is installed to be exposed to a space in which water in the body 10 is accommodated.
  • the humidity sensor 110 is installed on a side portion of the inner lower end 14 so as to be exposed to a space in which water in the body 10 is accommodated. Accordingly, the humidity sensor 110 may measure the humidity of a space in which water in the body 10 is accommodated.
  • FIG. 5 is a block diagram of an electric kettle according to an embodiment of the present invention
  • FIG. 6 is a flowchart illustrating a method of operating an electric kettle according to an embodiment of the present invention.
  • the electric kettle 100 includes a humidity sensor 110, a controller 120, a heater 130, and a wireless power receiving device 140.
  • the humidity measured by the humidity sensor 110 When water is accommodated in the body 10 of the electric kettle 100, high humidity is indicated, so the humidity measured by the humidity sensor 110 has a high value. If a small amount of water is not evaporated inside the body 10, or when the body 10 is heated by a heater in a completely dry state, the internal humidity may gradually decrease.
  • the electric kettle 100 may determine whether or not the contents are present in the space of the body based on the humidity measured by the humidity sensor.
  • the heater 130 may heat water contained in the body 10. Specifically, the heater 130 may be located under the bottom of the body 10. The heater 130 may receive power from the wireless power receiving device 140.
  • the wireless power receiving device 140 may receive a wireless power signal from the wireless power transmitting device 200 and provide power to the heater 130.
  • the heater 130 receives power from the wireless power receiving device 140 and generates heat. When the heater 130 generates heat, the heat of the heater 130 heats contents such as water accommodated in the space of the body 10. Accordingly, water accommodated in the space of the body 10 may boil.
  • the humidity sensor 110 is installed on the body 10 so as to be exposed to the inner space of the body 10 of the electric kettle 100 as described above. Therefore, the humidity sensor 110 may measure the humidity of the internal space of the body 10.
  • the humidity sensor 110 may be an electronic humidity sensor.
  • the electronic humidity sensor may include an electrical resistance humidity sensor and a capacitive humidity sensor. The embodiments are not limited thereto, and the humidity sensor 110 may be implemented with any humidity sensor that is obvious to those skilled in the art.
  • the humidity measured by the humidity sensor 110 is output or provided to the controller 120.
  • the controller 120 may determine whether or not the contents are present in the space of the body 10 based on the humidity measured by the humidity sensor 110.
  • the controller 120 determines whether the humidity is greater than or equal to a first threshold value, and stops the heating operation of the heater when the humidity is less than a first threshold value.
  • the first threshold value may be determined in a range of 40 to 60% humidity.
  • Humidity 40-60% may generally be the indoor average humidity.
  • the controller 120 acquires the humidity measured by the humidity sensor 110 after heating of the heater starts, and when the measured humidity is less than the first threshold, contents such as water are stored in the space of the body 10. It judges that there is no and stops the heating operation. For example, the controller 120 may cut off power supplied from the repair power receiving device 140 to the heater 130 through, for example, a switch 142.
  • the first threshold may be affected by external weather. Therefore, the first threshold may be changed according to the season.
  • the controller 120 determines the elapse of a predetermined time while maintaining the heating operation.
  • the controller 120 determines whether the humidity measured by the humidity sensor 110 is greater than a second threshold value after a predetermined time has elapsed. For example, the controller 120 determines whether a small amount of water inside the body 10 of the electric kettle 100 has been evaporated or is completely dry, and the heating operation is performed, so that the internal humidity gradually decreases and falls below a specific humidity. It is to do.
  • the second threshold may be, for example, 30% humidity. That is, the controller 120 stops the heating operation of the heater when the measured humidity is less than or equal to the second threshold. Accordingly, when a small amount of water inside the body 10 of the electric kettle 100 has not been evaporated or is completely dry, the heating operation is performed and the internal humidity is less than 30%, the controller 120 ), it can be judged that there is no water in the space.
  • the controller 120 maintains the heating operation when the measured humidity is greater than the second threshold. That is, even after performing the heating operation for a predetermined period of time, the controller 120 determines that there is water in the internal space of the body 10 if the internal humidity of the body 10 is greater than the second threshold value and maintains the heating operation. .
  • the controller 120 continuously determines whether the measured humidity is less than or equal to the second threshold value until the heating operation is completed, and continues to perform the heating operation when the internal humidity of the body 10 is greater than the second threshold value. .
  • FIG. 6 is a flowchart illustrating a method of operating an electric kettle according to an embodiment of the present invention.
  • the electric kettle 110 determines whether the heating operation starts in step 301.
  • the heating operation may be started when a predetermined condition is satisfied. For example, the user may select to heat water inside the body 10 of the electric kettle 100 until it reaches a predetermined temperature. Alternatively, the heating operation may be started by a predetermined reservation operation.
  • the electric kettle 100 measures the humidity through the humidity sensor 110 in step 303. Subsequently, the electric kettle 100 determines whether the humidity measured in step 305 is equal to or greater than a first threshold value, and stops the heating operation of the heater in step 313 when the humidity is less than the first threshold value.
  • the electric kettle 100 acquires the humidity measured by the humidity sensor 110 after the heating operation of the heater starts, and when the measured humidity is less than the first threshold, the space of the body 10 is It is determined that there is no content such as water, and the heating operation is stopped.
  • the electric kettle 100 determines whether a predetermined time has elapsed in step 307.
  • the predetermined time can be, for example, several tens of seconds. Embodiments of the present invention are not limited thereto, and a predetermined time may be experimentally determined by a person skilled in the art.
  • the electric kettle 100 determines whether the humidity measured by the humidity sensor 110 in step 309 is greater than a second threshold value after a predetermined time has elapsed.
  • a small amount of water in the body 10 of the electric kettle 100 is not evaporated or the heating operation is performed in a completely dry state to determine whether the internal humidity gradually decreases and falls below a specific humidity. To judge.
  • the electric kettle 100 stops the heating operation of the heater in step 313 when the measured humidity is less than or equal to the second threshold. Accordingly, when a small amount of water inside the body 10 of the electric kettle 100 is not evaporated or is completely dry, the heating operation is performed so that the internal humidity is 30% or less, the electric kettle 100 is It can be determined that there is no water in the space of 10).
  • the electric kettle 100 maintains the heating operation in step 311 when the measured humidity is greater than the second threshold value. That is, even after performing the heating operation for a predetermined period of time, the controller 120 determines that there is water in the internal space of the body 10 if the internal humidity of the body 10 is greater than the second threshold value and maintains the heating operation. .
  • the electric kettle 100 returns to the step of determining whether the measured humidity is less than or equal to the second threshold value until the heating operation is completed. Accordingly, the electric kettle 100 continuously performs the heating operation when the internal humidity of the body 10 is greater than the second threshold value.
  • the electric kettle according to an embodiment of the present invention can quickly detect that there is no water in the wireless electric pot.
  • the electric kettle according to an embodiment of the present invention can prevent damage to the container by preventing continued heating when there is no water inside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Abstract

La présente invention concerne une bouilloire électrique comprenant : un corps formant un espace pour recevoir de l'eau ; un dispositif de chauffage disposé sur le corps et destiné à chauffer l'espace ; un appareil de réception d'énergie sans fil pour fournir de l'énergie au dispositif de chauffage par réception d'un signal d'énergie sans fil provenant d'un appareil de transmission d'énergie sans fil ; un capteur d'humidité disposé dans le corps de façon à être exposé à l'espace du corps ; et un dispositif de commande pour déterminer si des contenus sont présents ou non dans l'espace du corps, sur la base de l'humidité mesurée au moyen du capteur d'humidité.
PCT/KR2020/013006 2019-10-18 2020-09-24 Bouilloire électrique et son procédé de fonctionnement WO2021075754A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190130069A KR20210046403A (ko) 2019-10-18 2019-10-18 전기 주전자 및 그 동작 방법
KR10-2019-0130069 2019-10-18

Publications (1)

Publication Number Publication Date
WO2021075754A1 true WO2021075754A1 (fr) 2021-04-22

Family

ID=75538786

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2020/013006 WO2021075754A1 (fr) 2019-10-18 2020-09-24 Bouilloire électrique et son procédé de fonctionnement

Country Status (2)

Country Link
KR (1) KR20210046403A (fr)
WO (1) WO2021075754A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102436548B1 (ko) 2022-08-01 2022-08-25 주식회사 해님 잔류수 살균 기능을 갖는 전기 주전자

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335293A (en) * 1976-02-17 1982-06-15 Matsushita Electric Industrial Co., Ltd. Heating control apparatus by humidity detection
US5048400A (en) * 1989-12-22 1991-09-17 Matsushita Electric Industrial Co., Ltd. Pressure cooker with sensor
US20040149729A1 (en) * 2001-06-09 2004-08-05 Frank Kressmann Method for heating liquid in an electric kettle
WO2010040981A2 (fr) * 2008-10-09 2010-04-15 Otter Controls Limited Appareils et composants électriques
KR20100093978A (ko) * 2009-02-17 2010-08-26 김직자 무선 컵 주전자

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335293A (en) * 1976-02-17 1982-06-15 Matsushita Electric Industrial Co., Ltd. Heating control apparatus by humidity detection
US5048400A (en) * 1989-12-22 1991-09-17 Matsushita Electric Industrial Co., Ltd. Pressure cooker with sensor
US20040149729A1 (en) * 2001-06-09 2004-08-05 Frank Kressmann Method for heating liquid in an electric kettle
WO2010040981A2 (fr) * 2008-10-09 2010-04-15 Otter Controls Limited Appareils et composants électriques
KR20100093978A (ko) * 2009-02-17 2010-08-26 김직자 무선 컵 주전자

Also Published As

Publication number Publication date
KR20210046403A (ko) 2021-04-28

Similar Documents

Publication Publication Date Title
WO2021080208A1 (fr) Petit appareil domestique et procédé pour réaliser une communication dans un petit appareil domestique
WO2015088150A1 (fr) Tasse chauffante
EP3326258B1 (fr) Transfert de puissance sans fil inductif avec mesure de puissance synchronisée
JP4386585B2 (ja) 警報器及び警報装置
US9666360B2 (en) Pinless power coupling
WO2017026646A1 (fr) Dispositif de support de récipient de cuisson pour plaque de cuisson intelligente
KR102524092B1 (ko) 무선 전력 전송 시스템 통신 프로토콜
WO2014137199A1 (fr) Émetteur de puissance sans fil et procédé de commande de celui-ci
WO2019022438A1 (fr) Dispositif bobine et dispositif de charge sans fil le comprenant
WO2016080751A1 (fr) Appareil de transfert de puissance sans fil et procédé associé de détection de corps étrangers
WO2015076594A1 (fr) Appareil de recharge sans fil et procédé de recharge sans fil
WO2016200011A1 (fr) Structure de système de transmission d'énergie sans fil
US20100308665A1 (en) Energy transfer arrangement and method
CN105191040A (zh) 用于控制无线电力接收器中的异常状况的方法和装置
KR101974155B1 (ko) 멀티 코일 무선 충전 제어 방법 및 그를 위한 장치 및 시스템
JP2014158416A (ja) 異物を検出する無線電力送信装置および異物を検出する方法
WO2021075754A1 (fr) Bouilloire électrique et son procédé de fonctionnement
WO2019045350A2 (fr) Procédé et dispositif de transmission d'énergie sans fil
WO2015133718A1 (fr) Dispositif de chauffage d'un récipient
CN108140477A (zh) 用于电力无线传输的可堆叠连接器和装置
WO2021091087A1 (fr) Dispositif de table de cuisson wpt et son procédé de fonctionnement
CN204654457U (zh) 基于无线供电的智能保温杯
CN108551186A (zh) 一种双面无线充电方法和双面无线充电器
CN109744856A (zh) 无线测温装置、无线测温锅具及无线测温锅灶系统
CN106169706A (zh) 一种开关柜的一次主回路和二次传感器融合方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20875814

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20875814

Country of ref document: EP

Kind code of ref document: A1