EP3143189A1 - Verriegelungseinrichtung zum verriegeln einer tür eines haushaltsgeräts, haushaltsgerät und entsprechendes verfahren - Google Patents
Verriegelungseinrichtung zum verriegeln einer tür eines haushaltsgeräts, haushaltsgerät und entsprechendes verfahrenInfo
- Publication number
- EP3143189A1 EP3143189A1 EP15720735.8A EP15720735A EP3143189A1 EP 3143189 A1 EP3143189 A1 EP 3143189A1 EP 15720735 A EP15720735 A EP 15720735A EP 3143189 A1 EP3143189 A1 EP 3143189A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking
- voltage
- drive
- door
- control device
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/12—Casings; Tubs
- D06F39/14—Doors or covers; Securing means therefor
Definitions
- Locking device for locking a door of a
- the invention relates to a locking device for locking a door of a household appliance, with a locking element for mechanically locking the door, with a drive element, in particular an electric coil, for moving the locking element from an unlocking position in which the door is unlocked, in a locking position, in wherein the door is locked, depending on a current flow through the drive element, wherein the drive element is electrically coupled to a DC voltage source, with a switching element electrically coupled to the drive element for controlling the flow of current through the drive element, and with a control device for driving the switching element, wherein the control device is designed to emit a series of drive pulses to the switching element for controlling the current flow through the drive element.
- the invention also relates to a household appliance with such a locking device and a method for locking a door of a household appliance.
- a locking device which serves to lock a door of a washing machine.
- Such locking devices for washing machines are already known from the prior art in various embodiments.
- an electromagnet in the form of an electric coil which acts as a drive element for the actual locking bar, which consists for example of a soft magnetic material. If the coil is subjected to electrical voltage, the locking bar or the locking element is moved to a locking position and held in this position in which the door is mechanically locked and therefore can not be opened by the user.
- the coil is usually coupled in the prior art directly to a mains connection of the household appliance and thus operated with the mains voltage.
- a triac As a switching element for controlling the flow of current through the coil, a triac is used, which with Help a corresponding microcontroller is controlled.
- a locking device with a triac is known, for example, from the document EP 0 808 935 A2.
- a disadvantage of using a triac is the fact that the control terminal (gate) of the triac must be at the reference potential of the supply network or at the neutral potential (N). This in turn means that the microcontroller is also at this reference potential. In modern household appliances then a galvanic isolation between the microcontroller and other control devices must be ensured, which have a different electrical reference potential.
- a motor control device for driving a three-phase brushless DC motor or a synchronous machine must be at a reference potential, which is different from the said neutral potential of the supply network.
- optocouplers are used, which provide the required galvanic isolation.
- a remedy here creates the use of a DC voltage source for the locking of the door, as described for example in the document DE 10 2012 010 929 A1.
- the coil is incorporated here in an electrical circuit, which is supplied with a DC voltage.
- This DC voltage is provided for example by a machine-internal power supply, which generates the DC voltage by rectification from a mains AC voltage.
- the DC voltage is provided in particular by full-wave rectification from the mains AC voltage and may be an approximately amplitude-constant voltage generated by smoothing.
- one or more electrical consumers which may include, for example, an electric drive motor for the washing drum of the washing machine.
- the current flow through the coil is controlled by means of a transistor which is driven by drive pulses.
- the duty cycle of the voltage pulses is varied such that the voltage pulses have a low duty cycle at the beginning of an excitation phase and an increasingly larger duty cycle towards the middle of the excitation phase until a maximum value of the coil current sets.
- a DC voltage source is used to supply a locking device, however, the problem arises that the DC voltage provided by the DC voltage source can break when the energy is delivered to electrical consumers. This is the case in particular when a capacitor is used as the DC voltage source and the energy for the coil or other load is taken from the capacitor. This removal of electrical energy then causes a voltage drop across the capacitor, which then needs to be recharged. The charging of the capacitor is in turn dependent on the current phase position of the mains voltage.
- a locking device is designed for locking a door of a household appliance.
- the locking device comprises a locking element for mechanically locking the door.
- the locking element is formed of a soft magnetic material.
- the locking device further comprises a drive element for moving the locking element from an unlocking position, in which the door is unlocked and thus can be freely opened by the user, in a locking position in which the door is locked by the locking element, depending on a Current flow through the drive element.
- the drive element is electrically coupled to a DC voltage source.
- the drive element may be, for example, a coil or an electromagnet.
- the locking device further comprises a switching element - in particular a semiconductor switch - for controlling the current flow through the drive element.
- the switching element is electrically coupled to the drive element, in particular electrically connected in series with the drive element.
- a control device is used to control the switching element and thus to control the current flow while delivering at least one drive pulse to the switching element.
- the locking device has means for detecting a current voltage value of a DC voltage provided by the DC voltage source and the control device sets a pulse length of the drive pulse as a function of the current voltage value during operation of the locking device.
- the pulse length of the current drive pulse and thus the length of the output to the drive element voltage pulse in response to the current voltage level of the DC voltage is achieved that the pulse length of the drive pulse always adapted to the current voltage value and thus to the drive element, a constant electric power and Therefore, sufficient electrical energy can be delivered, with which the locking element can be safely and reliably brought into the locked position.
- the pulse length of the drive pulse at a lower voltage value can be set greater than at a higher voltage value in order to always be able to ensure that a sufficient power is delivered to the drive element.
- a household appliance is understood to be a device which is used for household management.
- the household appliance is a device for the care of laundry items, such as a washing machine, a washer-dryer or a tumble dryer.
- the door is in particular a device component with which the opening of a laundry drum of the household appliance can be closed.
- a semiconductor switch whose control terminal is coupled to the control device is used in particular as a switching element.
- a semiconductor switch can be used, for example, a PNP bipolar transistor and / or an NPN bipolar transistor and / or an N-MOSFET and / or a P-MOSFET and / or an IGBT.
- the control device controls the switching element with a sequence of pulses using pulse width modulation.
- the control device can set a current duty cycle "of the drive pulses depending on the current voltage value."
- the drive pulses can therefore be a periodic sequence of pulses in which the ratio of the pulse duration to the cycle duration is set as a function of the current voltage value on the one hand has the advantage that the sequence of drive pulses can thus be synchronized with the mains voltage without much effort; on the other hand, such a pulse width modulation can be implemented with a periodic sequence of pulses without much effort since the frequency of the drive pulses always remains constant and only the current one Duty cycle dependent on the current voltage value needs to be adjusted.
- the DC voltage source is an intermediate circuit capacitor, which is coupled to an output of a rectifier, in particular a full-bridge rectifier, which is designed to rectify a mains voltage.
- the rectifier is in particular coupled, on the one hand, to mains connections of the household appliance and, on the other hand, to the intermediate circuit capacitor, so that the voltage rectified by the rectifier is delivered to the intermediate circuit capacitor and then smoothed with the intermediate circuit capacitor.
- RMS value rectified and smoothed mains voltage
- This embodiment has the advantage that an already present in today's household appliances already existing electrical DC link can be used to move the locking element in the locked position or to keep in this locked position. It is therefore unnecessary to use separate DC sources with the associated disadvantages.
- an inverter which is designed to provide a supply voltage for an electric drive motor of the domestic appliance from the DC voltage, is additionally coupled to the same DC voltage source, in particular to the named DC link capacitor. So it is specifically used the DC voltage source, which otherwise serves to supply the drive motor.
- the drive motor is a multiphase-in particular three-phase brushless DC motor (BLDC) or a synchronous machine, so that the inverter generates a plurality of alternating voltages from the DC voltage for the operation of the drive motor.
- BLDC three-phase brushless DC motor
- this drive motor is used to drive a laundry drum of the household appliance.
- the control device can set a larger pulse length of the drive pulses than at a higher voltage value, so that the pulse length is inversely proportional to the DC voltage at the DC voltage source.
- the control means may adjust the pulse length of the drive pulses inversely proportional to the square of the voltage value of the DC voltage. Unintentional unlocking the door during operation of the household appliance can thus be safely prevented.
- a lookup table can be stored, which indicates the dependence of the pulse length of the DC voltage of the DC voltage source. The controller may then adjust the current pulse length using the lookup table. The setting of the pulse length depending on the current voltage value can thus be realized without much computing power.
- the locking device may also comprise at least one further switching element (hereinafter referred to as second switching element), which is coupled to the drive element and in particular electrically connected in series with the first switching element and the drive element.
- the control device can be designed so that at least during the drive pulse of the first switching element, the second switching element is opened, so that this second switching element is driven with one or a series of drive pulse having at least the same pulse length as the drive pulses of the first switching element. The or the drive pulses of the second switching element thus overlap with the Antêtimpuls or the drive pulses of the first switching element.
- the use of the second switching element has advantages in terms of reliability: In case of failure of one of the switching elements can be prevented with the other switching element, that the drive element - in particular a coil - is acted upon by a DC voltage. If a defect or an error of one of the switching elements is detected by the control device, a corresponding warning signal can be output.
- a current phase position of the mains voltage is detected by the control device and the sequence of the drive pulses is generated as a function of the phase of the mains voltage.
- the sequence of drive pulses can be synchronized with the mains voltage and, for example, it is possible to generate the drive pulses when the DC voltage source is fully charged. Excessive discharge of the DC voltage source can thus be reliably prevented.
- An inventive household appliance in particular for the care of items of laundry, comprises a door and a locking device according to the invention for locking the door.
- An inventive method is used to lock a door of a household appliance by means of a locking element which is moved depending on a current flow through a drive element from an unlocked position into a locking position, wherein the drive element is acted upon by a DC voltage of a DC voltage source and the current flow through the drive element by means of a Switching element is controlled, which is controlled by a control device with a sequence of drive pulses. A current voltage value of the DC voltage is detected, and a pulse length of the drive pulses is set by the control device as a function of the current voltage value.
- Figure 1 is a schematic representation of a household appliance according to an embodiment of the invention.
- 2 is a schematic representation of a circuit arrangement with a locking device according to an embodiment of the invention; and
- Fig. 3 shows a dependence of a pulse length of AnSteuerimpulsen of a DC link DC voltage.
- An illustrated in Fig. 1 home appliance 1 is for example a washing machine.
- the household appliance 1 comprises a laundry drum 2 for receiving items of laundry, which is rotatably mounted about a horizontal axis of rotation 4 in a housing 3 of the household appliance 1 - and also in a non-illustrated tub.
- the items of laundry can be introduced through an opening in the laundry drum 2, which can be closed by means of a door 5.
- the user of the household appliance 1 can open and close the door 5. If the door 5 is closed, it can then be locked by means of a locking device 6 relative to the housing 3 and thus mechanically fixed relative to the housing 3, so that an opening of the door 5 is no longer possible.
- the household appliance 1 For driving the laundry drum 2, the household appliance 1 includes an electric drive motor 7.
- the user can select the desired operating program of the household appliance 1 with the aid of an operating device 8 and activate the operating process. If the operating process - here a washing process - activated, the door 5 is locked by means of the locking device 6 and unlocked only after completion of the operating process. Opening the door 5 during the operating process is thus prevented.
- a circuit arrangement is part of the household appliance 1 and comprises the locking device 6.
- the household appliance 1 has power connections 9, 10, which are based on electrical potentials L, N of the supply network. Between the power terminals 9, 10, a mains voltage U N is provided, which is an AC voltage.
- the AC voltage U N is rectified by means of a rectifier 1 1, which is formed in the embodiment as a full-bridge rectifier with four diodes. On the output side, the rectifier 1 1 is coupled to a DC link capacitor 12, which smoothes the rectified voltage.
- a DC link voltage V Z K is located between a DC link node 13 on the one hand and a reference potential 14 on the other.
- the reference potential 14 is an electric different from the neutral potential N. Potential.
- the intermediate circuit capacitor 12 represents a DC voltage source in the context of the present invention.
- the drive motor 7 is a three-phase synchronous machine or a brushless DC motor (BLDC) with permanent magnets.
- Alternating voltages for the stator winding are provided by means of an inverter 15, which comprises an inverter with a plurality of transistors and is coupled to the intermediate circuit node 1 3.
- the alternating voltages for the drive motor 7 are thus provided from the DC link DC voltage V Z K or the inverter 1 5 is supplied with electrical energy from the DC link capacitor 12.
- the inverter 15 is controlled by an engine control unit 16.
- This engine control unit 16 is located on the reference potential 14 and is supplied with a supply voltage, which is provided by means of a DC-DC converter 1 7, for example, a switching power supply, from the intermediate circuit DC voltage V Z K.
- This supply voltage can be 3.3 V or 5 V, for example.
- the locking device 6 comprises an electrical switch 18 of a door contact, which is closed only when the door 5 is closed and open when the door 5 is open. The current can thus flow through the switch 18 only when the door 5 is closed.
- the switch 18 is connected to a node 1 9, on which the same electrical potential as on the DC link node 13 is applied.
- the switch 18 is connected to a drive element 20 in the form of a coil or an electromagnet.
- this drive element 20 is coupled to the reference potential 14 via a node 21 and via a series connection of a first and a second switching element 22, 23. So there is a series circuit of the drive element 20 and the switching elements 22, 23 before.
- a freewheeling diode 24 connects the node 21 to the node 19 and thus allows a current flow through the drive element 20 when the switching elements 22, 23 lock.
- the switching elements 22, 23 are formed as NPN bipolar transistors.
- the collector of the first switching element 22 is connected to the node 21; the emitter of the switching element 22 is connected to the collector of the second switching element 23.
- the emitter of the second switching element 23 is connected to the Reference potential 14 is connected and thus lies on the reference potential 14.
- a control device 25 is provided in the form of a microcontroller, which is connected to the base terminals of the switching elements 22, 23 and also located on the reference potential 14.
- a supply voltage (for example 3.3 V or 5 V) for the control device 25 is generated by means of a DC-DC converter 26, for example a switched-mode power supply.
- the control device 25 may also be formed integrally with the engine control unit 16, so that the control device 25 and the engine control unit 16 are formed by a single control device, in particular a microcontroller.
- a current flow I through the drive member 20 causes a locking member 27 is moved from an unlocking position in which the door 5 is unlocked, in a locking position in which the door 5 by the locking element
- the locking element 27 is fixed relative to the housing 3 and thus locked.
- the locking element 27 may comprise, for example, a soft-magnetic locking bolt.
- the locking element 27 is associated with a switch 28, which is coupled on the one hand to the node 19 and on the other hand to the control device 25. If the locking member 27 is moved to the locking position, so will the switch
- the switching element 22 and the collector of the second switching element 23 is coupled to the control device 25, so that a current flow through the switching elements 22, 23 and thus the proper functioning of the switching elements 22, 23 can be checked.
- the switching element 22 is controlled by the control device 25.
- the second switching element 23 serves as a safety switching element and can be controlled independently of the switching element 22.
- the safety switching element 23 can be driven in synchronism with the first switching element 22 with a same sequence of drive pulses or alternatively with longer pulses, so that the second switching element 23 is opened at least during the entire duration of the drive pulses 30 of the first switching element 22 is.
- the second switching element 23 can also be switched through constantly.
- the safety switching element 23 can be locked.
- the actuation of the safety switching element preferably takes place independently of the switching element 22 by a safety circuit realized in the control device 25 or a software function.
- a safety function can be realized independently of the function commands for the shut-off element 27.
- the switching element 22 may also be driven with a sequence of drive pulses 30 using pulse width modulation.
- a coupling capacitor can then be provided between the output of the control device 25 and the switching element 22, which prevents the switching element 22 is continuously activated in the event of malfunction.
- the locking device 6 also includes means for detecting the current voltage value of the intermediate circuit DC voltage V ZK .
- the current voltage value is detected by the control device 25, which for this purpose, for example, a separate measuring input (not shown) may have, which - is connected to the intermediate circuit node 13 - for example via a voltage divider or other DC-DC converter. Additionally or alternatively, the detection of the voltage value of the intermediate circuit DC voltage V Z K via a supply input 31, via which the control device 25, the above-mentioned supply voltage is supplied.
- the temporal pulse length of the drive pulse 30 is set as a function of the current voltage value of the intermediate circuit DC voltage V Z K.
- the control device 25 continuously or continuously detects the respective instantaneous voltage value of the DC link voltage V Z K and controls the pulse length of the drive pulse 30 which is delivered to the first switching element 22 to bring the locking element 27 in the operation of the household appliance 1 in the locked position.
- the electric power delivered to the drive element 20 is adjusted by means of the pulse length of the drive pulse 30 as a function of the current voltage value of the DC link voltage V ZK or adapted to the current voltage value.
- This adaptation looks like that Pulse length of the AnSteuerimpulses 30 is inversely proportional to the square of the DC link voltage V ZK .
- the DC link voltage V ZK in volts dc is plotted on the y-axis; on the x-axis, a pulse length w of the drive pulse 30 is plotted in milliseconds.
- the DC link voltage V ZK may vary between a lower limit of about 150V and an upper limit of about 400V.
- a pulse length w of approximately 4.4 ms is set.
- a pulse length w of approximately 32.6 ms is set.
- the following lookup table can be stored in the control device 25:
- the control device 25 can also detect the current phase position of the mains voltage U N and synchronize the sequence of the drive pulses 30 with the mains voltage U N such that the drive pulses 30 are generated when the intermediate circuit capacitor 12 is charged. This prevents that the DC link DC voltage V ZK CLOSE breaks down too much and falls below the lower limit of 150 V, for example.
- the control device 25 continuously or continuously detects the instantaneous voltage value of the intermediate circuit DC voltage V Z K and continuously controls the pulse length of the drive pulses 30, which are continuously supplied to the first switching element 22 to the Locking element 27 to keep in the operation of the household appliance 1 continuously in the locked position.
- the electrical power delivered to the drive element 20 is kept constant over time by the pulse length of the drive pulses 30 depending on the current voltage value of the DC link voltage V Z K adjusted or adapted to the current voltage value.
- This adaptation looks such that the pulse length of the drive pulses 30 is inversely proportional to the square of the DC link voltage V Z K.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15720735T PL3143189T3 (pl) | 2014-05-14 | 2015-05-08 | Urządzenie blokujące do blokowania drzwi urządzenia gospodarstwa domowego, urządzenie gospodarstwa domowego i odpowiedni sposób |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014209113.6A DE102014209113A1 (de) | 2014-05-14 | 2014-05-14 | Verriegelungseinrichtung zum Verriegeln einer Tür eines Haushaltsgeräts, Haushaltsgerät und entsprechendes Verfahren |
PCT/EP2015/060208 WO2015173145A1 (de) | 2014-05-14 | 2015-05-08 | Verriegelungseinrichtung zum verriegeln einer tür eines haushaltsgeräts, haushaltsgerät und entsprechendes verfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3143189A1 true EP3143189A1 (de) | 2017-03-22 |
EP3143189B1 EP3143189B1 (de) | 2018-02-28 |
Family
ID=53052870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15720735.8A Active EP3143189B1 (de) | 2014-05-14 | 2015-05-08 | Verriegelungseinrichtung zum verriegeln einer tür eines haushaltsgeräts, haushaltsgerät und entsprechendes verfahren |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP3143189B1 (de) |
CN (1) | CN106460299B (de) |
DE (1) | DE102014209113A1 (de) |
ES (1) | ES2665329T3 (de) |
PL (1) | PL3143189T3 (de) |
RU (1) | RU2644102C1 (de) |
WO (1) | WO2015173145A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102385798B1 (ko) * | 2017-05-17 | 2022-04-14 | 삼성전자주식회사 | 세탁기 및 세탁기의 제어 방법 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1289378B1 (it) | 1996-05-22 | 1998-10-02 | Electrolux Zanussi Elettrodome | Lavabiancheria con bloccoporta istantaneo |
IT1303590B1 (it) * | 1998-12-18 | 2000-11-14 | Bitron Spa | Dispositivo di bloccaggio e sbloccaggio del portello di un apparecchioelettrodomestico. |
DE102005058899A1 (de) * | 2005-12-09 | 2007-06-14 | BSH Bosch und Siemens Hausgeräte GmbH | Schaltungsanordnung zum Verriegeln und/oder Entriegeln eines Türschlosses, insbesondere in einem elektrischen Hausgerät |
EP1962011B1 (de) * | 2007-02-26 | 2010-04-21 | Diehl AKO Stiftung & Co. KG | Wäschebehandlungsgerät |
DE102007037767A1 (de) * | 2007-02-26 | 2008-08-28 | Diehl Ako Stiftung & Co. Kg | Gerät mit ansteuerbarer Schutzeinrichtung |
DE102008041724B4 (de) * | 2008-08-29 | 2013-09-05 | Faurecia Innenraum Systeme Gmbh | Verschluss für ein Staufach eines Kraftfahrzeugs |
DE102008044378A1 (de) * | 2008-12-05 | 2010-06-10 | BSH Bosch und Siemens Hausgeräte GmbH | Haushaltsgerät mit automatischer Abschaltung |
US8421275B2 (en) * | 2009-11-19 | 2013-04-16 | Electrolux Home Products, Inc. | Apparatus for providing zero standby power control in an appliance |
WO2011109235A1 (en) * | 2010-03-01 | 2011-09-09 | Illinois Tool Works Inc. | Lid lock with magnetic anti-tamper feature |
DE102010010929A1 (de) * | 2010-03-10 | 2011-09-15 | Airbus Operations Gmbh | Schutz von Wasserleitungen gegen Frost |
DE102011121702C5 (de) * | 2011-12-09 | 2016-08-11 | Assa Abloy Sicherheitstechnik Gmbh | Verfahren zum Betreiben eines elektrischen Türöffners, sowie elektrischer Türöffner |
DE102012010929B4 (de) | 2012-06-01 | 2020-02-13 | Emz-Hanauer Gmbh & Co. Kgaa | Verschlusseinrichtung für eine Tür einer häuslichen Waschmaschine |
-
2014
- 2014-05-14 DE DE102014209113.6A patent/DE102014209113A1/de not_active Withdrawn
-
2015
- 2015-05-08 RU RU2016148213A patent/RU2644102C1/ru not_active IP Right Cessation
- 2015-05-08 EP EP15720735.8A patent/EP3143189B1/de active Active
- 2015-05-08 WO PCT/EP2015/060208 patent/WO2015173145A1/de active Application Filing
- 2015-05-08 CN CN201580025020.7A patent/CN106460299B/zh active Active
- 2015-05-08 PL PL15720735T patent/PL3143189T3/pl unknown
- 2015-05-08 ES ES15720735.8T patent/ES2665329T3/es active Active
Also Published As
Publication number | Publication date |
---|---|
ES2665329T3 (es) | 2018-04-25 |
EP3143189B1 (de) | 2018-02-28 |
DE102014209113A1 (de) | 2015-11-19 |
WO2015173145A1 (de) | 2015-11-19 |
PL3143189T3 (pl) | 2018-08-31 |
RU2644102C1 (ru) | 2018-02-07 |
CN106460299B (zh) | 2018-10-30 |
CN106460299A (zh) | 2017-02-22 |
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