WO2023066000A1 - Appareil de traitement d'ondes électromagnétiques - Google Patents

Appareil de traitement d'ondes électromagnétiques Download PDF

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Publication number
WO2023066000A1
WO2023066000A1 PCT/CN2022/122245 CN2022122245W WO2023066000A1 WO 2023066000 A1 WO2023066000 A1 WO 2023066000A1 CN 2022122245 W CN2022122245 W CN 2022122245W WO 2023066000 A1 WO2023066000 A1 WO 2023066000A1
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WO
WIPO (PCT)
Prior art keywords
electromagnetic wave
wave generating
processing device
resistor
gate
Prior art date
Application number
PCT/CN2022/122245
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English (en)
Chinese (zh)
Inventor
韩志强
李春阳
Original Assignee
青岛海尔电冰箱有限公司
海尔智家股份有限公司
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.)
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Publication of WO2023066000A1 publication Critical patent/WO2023066000A1/fr

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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/36—Freezing; Subsequent thawing; Cooling
    • A23L3/365—Thawing subsequent to freezing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power

Definitions

  • the invention relates to kitchen utensils, in particular to an electromagnetic wave processing device.
  • the prior art generally uses an electromagnetic wave processing device to thaw food.
  • An object of the present invention is to overcome at least one technical defect in the prior art and provide an electromagnetic wave processing device with a higher safety factor.
  • a further object of the invention is to reduce production costs.
  • Another further object of the invention is to save energy.
  • an electromagnetic wave processing device comprising:
  • a cylinder defining a chamber for containing the material to be treated
  • At least one door body is configured such that when both are in an open state, the object to be treated can be taken out from the chamber or can be placed in the chamber;
  • An electromagnetic wave generating system at least partly disposed in or accessible to the barrel, to emit electromagnetic waves to the chamber to treat the object to be treated;
  • the protection circuit includes at least one logic gate connected in series with the electromagnetic wave generating system and configured to block the electromagnetic wave generating system when at least one of the at least one gate is in an open state.
  • the at least one logic gate includes an AND gate, and the AND gate has multiple input terminals and one output terminal; wherein,
  • One said input end and said output end of said AND gate are connected in series with said electromagnetic wave generating system;
  • the other at least one input end of the AND gate is configured such that at least one of the at least one gates is in an open state and at least one is at a low level.
  • the protection circuit also includes:
  • At least one linkage switch corresponding to at least one of the doors, and configured to be disconnected when the corresponding door is in a closed state and closed when the corresponding door is in an open state;
  • At least one first pull-up resistor is set so that one end is connected to a high level, and the other end is respectively electrically connected to at least one input end of the AND gate;
  • the at least one linkage switch is configured such that one end is grounded, and the other end is respectively connected between the at least one first pull-up resistor and the at least one input end.
  • the protection circuit further includes:
  • At least one linkage switch corresponding to at least one of the doors, and configured to be disconnected when the corresponding door is in a closed state and closed when the corresponding door is in an open state;
  • the first pull-up resistor is set so that one end is connected to a high level, and the other end is electrically connected to an input end of the AND gate;
  • the at least one linkage switch is arranged in series, and one end is grounded, and the other end is connected between the first pull-up resistor and the input end corresponding to the first pull-up resistor.
  • the electromagnetic wave generating system includes:
  • An electromagnetic wave generating module configured to generate an electromagnetic wave signal
  • a controller configured to be electrically connected to the electromagnetic wave generating module, and used to control the start and stop of the electromagnetic wave generating module;
  • the at least one logic gate is connected in series between the controller and the electromagnetic wave generating module.
  • the protection circuit also includes:
  • the first safety resistor is configured such that one end is grounded and the other end is connected between the controller and the at least one logic gate;
  • the second safety resistor is configured such that one end is grounded and the other end is connected between the at least one logic gate and the electromagnetic wave generating module.
  • the electromagnetic wave generating system includes:
  • An electromagnetic wave generating module configured to generate an electromagnetic wave signal
  • a power supply module configured to supply power to the electromagnetic wave generating module
  • control switch configured to conduct or block the circuit between the power supply module and the electromagnetic wave generating module
  • a controller configured to be electrically connected to the control switch, and used to control the on-off of the control switch
  • control switch is of the normally-off type
  • the at least one logic gate is connected in series between the controller and the control switch.
  • control switch is an electromagnetic relay; wherein
  • the switch part of the relay is connected in series between the power supply module and the electromagnetic wave generating module;
  • the at least one logic gate is connected in series between the controller and one end of the electromagnetic portion of the relay; and the protection circuit further includes:
  • a pull-down resistor configured to have one end connected to ground and the other end electrically connected to the other end of the electromagnetic portion of the relay.
  • the protection circuit also includes:
  • a PNP triode the emitter of which is electrically connected to one end of the electromagnetic part of the relay, the base is electrically connected to the output end of the at least one logic gate, and the collector is arranged to be grounded;
  • the second pull-up resistor is set so that one end is connected to a high level, and the other end is connected between the emitter of the triode and the electromagnetic part of the relay.
  • the electromagnetic wave processing device further includes:
  • the refrigeration system is used to provide refrigeration to the electromagnetic wave processing device.
  • the electromagnetic wave processing device of the present invention is provided with a protection circuit, which can block the electromagnetic wave generating system when the door is in an open state, thereby preventing electromagnetic wave leakage from damaging the user's health and other electrical devices around the chamber. Controlling the start and stop of the electromagnetic wave generating system has a higher safety factor, higher stability and reliability.
  • the present invention uses the AND door and the linkage switch reflecting the opening and closing state of the door body to turn on and off the electromagnetic wave generating system.
  • the structure is simple, stable and reliable, and the AND door can be connected in series with the electromagnetic wave generating system first, and then the electromagnetic wave generating system can be connected in series when the whole machine is assembled. It is connected with the linkage switch, which is convenient for modular production and applicable to different models, reducing the production cost.
  • the protection circuit of the present invention is configured to turn on or block the power supply from the power supply module to the electromagnetic wave generating module, which not only further improves the safety of the electromagnetic wave processing device, but also prevents the electromagnetic wave generating module from being in a standby state for a long time, avoiding unnecessary Expected power loss, saving energy.
  • Fig. 1 is a schematic structural diagram of an electromagnetic wave processing device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a protection circuit according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a protection circuit according to another embodiment of the present invention.
  • Fig. 4 is a schematic cross-sectional view of an electromagnetic wave processing device according to another embodiment of the present invention.
  • Fig. 1 is a schematic structural diagram of an electromagnetic wave processing device 100 according to an embodiment of the present invention.
  • the electromagnetic wave processing device 100 may include a cylinder body 110 , at least one door body, and an electromagnetic wave generating system.
  • at least one is one, two or more.
  • the barrel 110 may define a chamber 111 for containing the object 180 to be treated.
  • the cylinder body 110 may be provided with a pick-and-place opening communicating with the chamber 111, so that the to-be-processed object 180 can be picked and put.
  • One or more doors can be configured such that when all of them are in an open state, the object 180 to be processed can be taken out from the chamber 111 or can be placed in the chamber 111 .
  • the electromagnetic wave generating system may be at least partly disposed in or accessible to the cylinder 110 to emit electromagnetic waves into the cylinder 110 to treat the object 180 to be treated (for example, to heat).
  • the electromagnetic wave generating system may include an electromagnetic wave generating module 131 , a radiation antenna 132 electrically connected to the electromagnetic wave generating module 131 , a power supply module 133 for supplying power to the electromagnetic wave generating module 131 , and a controller 134 .
  • the electromagnetic wave generating module 131 can be configured to generate electromagnetic wave signals, and the radiation antenna 132 can be disposed in the barrel 110 to generate electromagnetic waves in the barrel 110 to process the object 180 in the barrel 110 .
  • the controller 134 can be configured to be electrically connected to the electromagnetic wave generating module 131 to control the start and stop of the electromagnetic wave generating module 131 and adjust the working parameters of the electromagnetic wave generating module 131 .
  • FIG. 2 is a schematic structure diagram of a protection circuit 140 according to an embodiment of the present invention (in FIGS. 2 and 3 , "IN” means “input”; “OUT” means “output”).
  • the electromagnetic wave processing device 100 may further include a protection circuit 140 to improve the safety performance of the electromagnetic wave processing device 100 .
  • the protection circuit 140 may include at least one logic gate. At least one logic gate can be connected in series with the electromagnetic wave generating system, and configured to block the electromagnetic wave generating system when at least one of the gates is in an open state, thereby preventing electromagnetic wave leakage from damaging the user's health and other electrical devices around the chamber 111. Compared with simply using the control method to control the start and stop of the electromagnetic wave generating system, the safety factor is higher, and it has higher stability and reliability.
  • the logic gates may include an AND gate N1.
  • the AND gate N1 can have multiple input terminals and one output terminal. When the inputs of multiple input terminals are high level, the output of the output terminal is high level; when the input of one or more of the multiple input terminals is low level Usually, the output of the output terminal is low level.
  • An input terminal and an output terminal of the AND gate N1 can be connected in series with the electromagnetic wave generating system, and at least one other input terminal is configured so that at least one of the gates is at a low level when at least one of the gates is in an open state, so that at least one of the gates A system that blocks electromagnetic wave generation when in an open state.
  • the protection circuit 140 may further include at least one linkage switch S1 and at least one first pull-up resistor R1.
  • At least one linkage switch S1 may correspond to at least one door body, and is configured to be turned off when the corresponding door body is in a closed state and closed when the corresponding door body is in an open state.
  • the at least one first pull-up resistor R1 can be set so that one end is connected to a high level, and the other end is respectively electrically connected to at least one input end of the AND gate N1.
  • the at least one linkage switch S1 may be configured such that one end is grounded, and the other end is respectively connected between at least one first pull-up resistor R1 and at least one input end.
  • the number of the first pull-up resistor R1 and the input terminals of the AND gate N1 may be the same as the number of the linkage switch S1.
  • one end of the multiple first pull-up resistors R1 can be connected to a high level, and the other end is electrically connected to multiple input terminals of the AND gate N1, and the multiple linkage switches S1
  • One end can be grounded, and the other end can be respectively connected between a first pull-up resistor R1 and an input end of the AND gate N1.
  • the protection circuit 140 may further include at least one linkage switch S1 and a first pull-up resistor R1.
  • At least one linkage switch S1 may correspond to at least one door body, and is configured to be turned off when the corresponding door body is in a closed state and closed when the corresponding door body is in an open state.
  • the first pull-up resistor R1 can be set so that one end is connected to a high level, and the other end is electrically connected to an input end of the AND gate N1.
  • At least one linkage switch S1 can be set in series, and one end is grounded, and the other end is connected between the first pull-up resistor R1 and the corresponding input end of the first pull-up resistor R1.
  • the multiple linkage switches S1 may be connected in series between the ground point and the connection point between the first pull-up resistor R1 and the input terminal.
  • the number of linkage switches S1 may be the same as the number of door bodies.
  • the linkage switch S1 may also be one, which is turned off when all the doors are in the closed state, and closed when any door is in the open state.
  • the logic gates of the protection circuit 140 can be connected in series between the controller 134 and the electromagnetic wave generating module 131 , so that when any door is opened, the controller 134 cannot send an activation command to the electromagnetic wave generating module 131 .
  • the protection circuit 140 may further include a first safety resistor R2 and a second safety resistor R3. Wherein, one end of the first safety resistor R2 can be set to be grounded, and the other end is connected between the controller 134 and all logic gates, so as to improve circuit safety and stability.
  • the second safety resistor R3 can be set so that one end is grounded, and the other end is connected between all logic gates and the electromagnetic wave generating module 131, so as to improve circuit safety and stability.
  • the electromagnetic wave generating system may further include a control switch K1 for turning on or blocking the circuit between the power supply module 133 and the electromagnetic wave generating module 131 .
  • the controller 134 may be configured to be electrically connected to the control switch K1 for controlling the on-off of the control switch K1.
  • the control switch K1 is normally off.
  • the logic gates of the protection circuit 140 can be connected in series between the controller 134 and the control switch K1, so that when any one of the gates is in an open state, the controller 134 cannot send an instruction to turn on the control switch K1.
  • FIG. 3 is a schematic structural diagram of a protection circuit 140 according to another embodiment of the present invention.
  • the control switch K1 can be an electromagnetic relay.
  • the switch part of the relay can be connected in series between the power supply module 133 and the electromagnetic wave generating module 131 .
  • the logic gates of the protection circuit 140 may be connected in series between the controller 134 and one end of the electromagnetic portion of the relay.
  • the protection circuit 140 may further include a pull-down resistor R4.
  • the pull-down resistor R4 can be set such that one end is grounded and the other end is electrically connected to the other end of the electromagnetic part of the relay.
  • the protection circuit 140 may further include a PNP transistor Q1 and a second pull-up resistor R5.
  • the emitter of the PNP transistor Q1 can be set to be electrically connected to one end of the electromagnetic part of the relay, the base can be electrically connected to the output terminals of all logic gates, and the collector can be set to ground to amplify the voltage of the output terminals of the logic gates.
  • the second pull-up resistor R5 can be set so that one end is connected to a high level, and the other end is connected between the emitter of the triode Q1 and the electromagnetic part of the relay.
  • the protection circuit 140 may further include a first safety resistor R2.
  • the first safety resistor R2 can be set to have one end grounded, and the other end connected between the controller 134 and all logic gates, so as to improve circuit safety and stability.
  • the electromagnetic wave processing device 100 has only one door body 120 .
  • the AND gate N1 of the protection circuit 140 has only two input terminals, and the protection circuit 140 has only one linkage switch S1.
  • Fig. 4 is a schematic cross-sectional view of an electromagnetic wave processing device 100 according to another embodiment of the present invention.
  • the electromagnetic wave processing device 100 may further include a box body 150 defining at least one storage compartment 151 , and a refrigeration system 170 (such as a refrigerator) for providing cold energy to the storage compartment 151 .
  • a refrigeration system 170 such as a refrigerator
  • the cylinder body 110 can be disposed in a storage compartment 151 of the box body 150 , and the door body 160 can be configured to open and close an access opening of the storage compartment 151 . That is, the electromagnetic wave processing device 100 may include two doors.
  • the protection circuit 140 can be configured to block the electromagnetic wave generating system when any one of the door body 120 and the door body 160 is in an open state, and turn on the electromagnetic wave generating system when both the door body 120 and the door body 160 are in a closed state.
  • the protection circuit 140 can also only be linked with the opening and closing state of one of the door body 120 and the door body 160 .
  • the controller 134 can be configured to control the electromagnetic wave generating system to adjust the frequency of the electromagnetic wave signal generated by it within the pre-selected frequency interval every preset time interval t, so that the electromagnetic wave generating system meets the preset matching conditions, Record the frequency of the electromagnetic wave signal that meets the preset matching condition each time and calculate the change amount of the frequency of the electromagnetic wave signal that meets the preset matching condition before the preset matching number of times.
  • the change amount is less than or equal to the preset change threshold S, Control the electromagnetic wave generating system to stop working.
  • the inventors of the present application have creatively realized that the variation of the matching frequency in the same time period is relatively small, and it only has a significant drop when it is close to the phase transition region of water and is affected by the degree of frequency matching.
  • the frequency matching is satisfied
  • the electromagnetic wave generation system is controlled to stop working, which can stop the heating of the food at the state desired by the user, and is especially suitable for food thawing, which can prevent the object 180 from being thawed too much.
  • the temperature at the time of completion is generally -4 to -2°C, which can avoid bloody water from thawing when the object 180 to be processed is meat, and is easy for the user to cut.
  • the preset time interval t may be 25s ⁇ 40s, such as 25s, 30s, or 40s, so as to avoid misjudgment.
  • the optional frequency range may be 400MHz-500MHz, so as to ensure the temperature uniformity of the object 180 to be processed and the heating efficiency of the object 180 to be processed.
  • the preset matching times may be greater than or equal to 2, for example 3, to avoid misjudgment.
  • the preset matching times can also be 1, that is, the variation is the difference between the frequencies of two adjacent electromagnetic wave signals satisfying the preset matching condition.
  • the power of the electromagnetic wave signal during the frequency matching process may be 5% to 10% of the power of the electromagnetic wave signal during the normal heating process, so as to reduce adverse effects on the object 180 to be treated.
  • the controller 134 can be configured to use the minimum value of the pre-selected frequency range to the frequency of the electromagnetic wave signal satisfying the preset matching condition last time as the candidate frequency range for this frequency matching, and calculate the preset The difference between the frequency of the electromagnetic wave signal that satisfies the preset matching condition before the number of matching times and this time is used as the variation to quickly and accurately determine the frequency of the electromagnetic wave signal that meets the preset matching condition, thereby reducing the frequency of the frequency matching process. 180 quality effects, improve the timeliness of judging whether to stop heating.
  • the controller 134 may be configured to first calculate the frequency difference (absolute value) of every two adjacent electromagnetic wave signals satisfying the preset matching condition, and then add all the differences to obtain the variation, to improve accuracy.
  • the matching condition when performing frequency matching for the first time, may be: the power of the reflected wave signal returning to the electromagnetic wave generating system is minimum, so as to facilitate subsequent frequency matching and shorten the time for subsequent frequency matching.
  • the controller 134 can be configured to determine the remaining heating time T of the object 180 to be treated according to the frequency of the electromagnetic wave signal that meets the preset matching condition for the first time according to the preset comparison table, and continue to heat the object 180 for a time greater than or equal to the determined remaining heating time T At time T, the electromagnetic wave generation system is controlled to stop working, so as to further ensure that the heated object 180 has excellent quality.
  • the comparison table records the corresponding relationship between different frequencies and the remaining heating time T.
  • the matching condition when frequency matching is performed for the first time and within a similar preset matching times after the first time, the matching condition may be: the power of the reflected wave signal returning to the electromagnetic wave generating system is minimum.
  • the controller 134 can be configured to follow the preset comparison table according to the sum of the frequency difference (absolute value) of every adjacent two electromagnetic wave signals satisfying the preset matching condition within the preset matching times for the first time and after the first time.
  • the comparison table records the corresponding relationship between the sum of different differences and the remaining heating time T.
  • the matching condition may be: the ratio of the power of the reflected wave signal returning to the electromagnetic wave generating system to the power of the incident wave signal propagating to the cylinder 110 from the electromagnetic wave generating system is greater than equal to the preset ratio threshold.
  • the preset ratio threshold may be 70%-80%.
  • the current frequency matching is terminated, so as to reduce adverse effects on the object 180 to be treated and improve heating efficiency.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

L'invention concerne un appareil de traitement d'ondes électromagnétiques. L'appareil de traitement d'ondes électromagnétiques comprend : un corps de cylindre, qui définit une chambre pour recevoir un objet à traiter ; au moins un corps de porte, au moyen duquel ledit objet peut être sorti de la chambre ou peut être placé dans la chambre lorsque le corps de porte est dans un état ouvert ; un système de génération d'ondes électromagnétiques ; et un circuit de protection. Le système de génération d'ondes électromagnétiques est au moins partiellement disposé dans le corps de cylindre ou relié au corps de cylindre, de manière à émettre des ondes électromagnétiques vers la chambre pour traiter ledit objet. Le circuit de protection comprend au moins une porte logique, la ou les portes logiques étant connectées en série au système de génération d'ondes électromagnétiques, et est configuré pour intercepter le système de génération d'ondes électromagnétiques lorsqu'au moins l'un des corps de porte est dans l'état ouvert, de façon à empêcher une fuite d'onde électromagnétique et un endommagement de la santé d'un utilisateur et d'autres dispositifs électriques autour de la chambre. Par comparaison avec simplement l'utilisation d'un procédé de commande pour commander le démarrage et l'arrêt d'un système de génération d'ondes électromagnétiques, l'appareil présente un coefficient de sécurité supérieur et une stabilité et une fiabilité supérieures.
PCT/CN2022/122245 2021-10-22 2022-09-28 Appareil de traitement d'ondes électromagnétiques WO2023066000A1 (fr)

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CN202111234522.4A CN116017795A (zh) 2021-10-22 2021-10-22 电磁波处理装置
CN202111234522.4 2021-10-22

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WO2023066000A1 true WO2023066000A1 (fr) 2023-04-27

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232210A (en) * 1977-06-22 1980-11-04 Tokyo Shibaura Electric Co., Ltd. Output power control system for microwave ovens
CN202868776U (zh) * 2012-10-15 2013-04-10 珠海格力电器股份有限公司 电磁炉
CN203517920U (zh) * 2013-09-27 2014-04-02 深圳麦格米特电气股份有限公司 一种微波炉托盘驱动控制电路
CN108151769A (zh) * 2017-11-30 2018-06-12 广东美的厨房电器制造有限公司 微波炉炉门检测装置和方法
CN216414621U (zh) * 2021-10-22 2022-04-29 青岛海尔电冰箱有限公司 电磁波处理装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232210A (en) * 1977-06-22 1980-11-04 Tokyo Shibaura Electric Co., Ltd. Output power control system for microwave ovens
CN202868776U (zh) * 2012-10-15 2013-04-10 珠海格力电器股份有限公司 电磁炉
CN203517920U (zh) * 2013-09-27 2014-04-02 深圳麦格米特电气股份有限公司 一种微波炉托盘驱动控制电路
CN108151769A (zh) * 2017-11-30 2018-06-12 广东美的厨房电器制造有限公司 微波炉炉门检测装置和方法
CN216414621U (zh) * 2021-10-22 2022-04-29 青岛海尔电冰箱有限公司 电磁波处理装置

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