Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
  • A01G31/00—Soilless cultivation, e.g. hydroponics
  • A01G31/02—Special apparatus therefor
  • A01G31/06—Hydroponic culture on racks or in stacked containers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
  • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
  • Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Definitions

• Above-ground cultivation rack unit particularly intended to be included in such a shelving, an above-ground culture module comprising such a unit and an above-ground culture system comprising at least two such racks.
• the present invention relates to the field of soil-less cultivation, which encompasses in particular hydroponics and aeroponics.
• the invention relates to a system of soilless cultivation.
• Soil-less cultivation unlike the so-called traditional culture, consists mainly of doing without earthy soil, in order to provide plants directly and only with the nutrients, also called inputs, which they need, with increased control over traditional culture.
• the advantages of soilless cultivation are numerous. In particular, the yields are increased, and the risks of disease are limited. The use of treatments to cure or prevent disease is thus also limited.
• the field of soilless culture includes, but is not limited to, hydroponics and aeroponics.
• Hydroponics consists of using an inert substrate in which the roots of plants develop, and irrigating the substrate with a nutrient solution including the inputs. Aeroponics dispenses with the substrate, and plant roots develop in the air. The inputs are then for example sprinkled on the roots.
• Low pressure aeroponic systems are the most widely used systems today. They are characterized in particular by the fact that the nutrient solution is sprayed through nozzles by a water pump having, generally, a high flow rate but delivering a low pressure. They correspond to an evolution of hydroponic systems where the irrigation system has been replaced.
• the high pressure employs nozzles aimed at misting the nutrient solution on the root system.
• This mist is made up of droplets, for example having a size of about fifty microns. This figure is recognized to be close to the size of the pores located on the roots of plants.
• the plants' assimilation capacity is maximum and the exchange between the roots and its propagation medium is optimized.
• Soil-less cultivation is of particular interest in regions where the climate makes traditional cultivation particularly complicated, if not impossible, due to the absence of cultivable soils and / or extreme temperatures and / or large climatic variations. .
• a soilless cultivation system is installed in a dedicated room, in which conditions are improved compared to the outside.
• the invention relates to an above-ground cultivation shelving comprising at least a first row and a second row.
• Each row includes at least one culture unit.
• Each culture unit comprises a frame surrounding at least one culture compartment, the frame of each unit having an opening opening into the culture compartment, and closed by a bottom on the side opposite the opening.
• Each cultivation unit is equipped with equipment to allow the cultivation of at least one plant without soil.
• each unit comprises at least one growth support in the culture compartment fixed to the frame.
• the growth medium is intended to allow the attachment and development of at least one plant.
• the shelving includes a system for distributing a nutrient solution into the growing compartment of each unit.
• the shelving further comprises a device for moving the two rows relative to one another so that the shelving can take two configurations:
• the shelving further comprising a sealing system limiting air exchange between the culture chamber of the shelving in closed configuration and the outside.
• the grow room forms an environment which can be easily controlled, separated from the external environment, favoring the development of the plant.
• the open configuration gives access to the interior of the units in order, for example, to carry out operations on the plants, to place them on the growth support, to harvest them.
• the shelving can be set up in any location.
• the closed shelving configuration isolates plants from the outside environment, so the environment does not need to be precisely controlled.
• the shelving makes it possible to form as many culture chambers as desired, for example by increasing the number of units and / or culture compartments per unit
• the sealing system may include a device for pressurizing the culture chamber and / or at least one seal extending around the culture chamber, when the shelving is in the closed configuration.
• the two rows are movable relative to each other by sliding in a transverse direction, and in which the opening of the frame of each unit extends parallel to a longitudinal plane.
• the transverse direction is horizontal
• the longitudinal direction is vertical.
• the shelving units are in a vertical position, limiting the occupied floor area.
• each row of the shelving can include at least two cultivation units.
• the two units are arranged adjacent to each other.
• the number of units per rack can be any.
• the frame of each unit includes in particular two side walls connecting an upper wall and a lower wall.
• the side walls, top wall and bottom wall frame the grow room.
• the two or more units in the same row are joined together by a side wall.
• the frame opening of two units in the same row is oriented in the same direction so that the grow compartment in one row is accessible from the aisle when the shelving is in the open configuration.
• the grow compartment of each unit in a first row is then in communication with the grow compartment of a unit in the second row when the shelving is in the closed position.
• the shelving may include equipment for measuring at least one characteristic of the atmosphere of the culture chamber and a system for regulating said characteristic of the atmosphere in the culture chamber of the shelving in closed position.
• control of the atmosphere in the culture chamber can be done according to a regulation instruction, from the characteristics of the atmosphere can be:
• the shelving can provide a nutrient solution control system.
• the invention relates to a unit for cultivation without soil for cultivation of plants especially intended to be included in a cultivation rack as presented above.
• the unit notably comprises a frame surrounding at least one culture compartment.
• the frame of each unit has an opening opening into the growing compartment, and each unit has a growing medium in the growing compartment attached to the frame.
• the growth support comprises at least one inert plate defining a side called root, in which the roots of the plant are intended to be placed, and a side called plant, in which the stems and / or the leaves of the plant are intended to be placed.
• the unit then includes an outlet for the nutrient solution distribution system on the root side.
• the outlet of the distribution system comprises at least one nozzle projecting droplets of the nutrient solution.
• the growth support plate extends parallel to the opening of the frame.
• the growth medium plate is thus preferably vertical.
• the invention relates to a soil-less cultivation module which comprises at least two cultivation units as presented above, in which the frame of the two units comprises a bottom on the side opposite the opening. , the bottom of the frames of the two units of the module being common.
• the invention relates to a soil-less cultivation system comprising at least two racks as presented above, the rows of the two racks being arranged substantially parallel to each other.
• the units of a row of a first shelf and the units of a row of a second shelf are assembled and form a row of modules as shown above.
• FIG. 1 schematically shows a system of cultivation without soil according to an embodiment of the invention, seen from the side, the system comprising two racks, each rack comprising two rows of cultivation units, the two racks being in a closed configuration.
• FIG. 2 schematically shows an embodiment of a cultivation unit of the cultivation system of Figure 1, front view.
• FIG. 3 schematically shows an example of a module comprising two cultivation units according to Figure 2 seen in side section.
• FIG.4 shows schematically an example of a module comprising a cultivation unit according to Figure 2 seen in side section.
• FIG. 5 is a side sectional view of the system of FIG. 1.
• FIG. 6 is a top view of the culture system of Figure 1.
• FIG. 7 shows schematically the system of culture without soil of FIG. 1, seen from the side, one rack being in an open configuration, the other rack being in a closed configuration.
• FIG. 8 is a side sectional view of the system of FIG. 7.
• FIG. 9 is a top view of the cultivation system of figure 7.
• FIG. 10 is a schematic representation of an exemplary embodiment of a regulation system and a nutrient solution control system.
• FIG. 1 there is shown an example of a system 100 for cultivation without soil comprising two racks 200 for cultivation.
• the system 100 may include more than two racks 200, as will follow from the following.
• Each shelving 200 comprises at least at least two units 300 for aboveground cultivation, arranged face to face.
• a rack 200 is organized from two rows of units 300.
• Each row includes at least one, in practice several, cultivation units 300.
• 300 grow units in one row of one rack face 300 grow units in the other row.
• the shelving 200 will be described further below.
• Each culture unit 300 comprises a frame 301 which has two side walls 302 connecting an upper wall 303 and a lower wall 304.
• the walls 302, 303, 304 of the frame 301 form a frame, of generally substantially rectangular shape according to the example of the figures, closed on one side by a bottom wall 305 and having an opening 306 on the other side.
• the opening 306 provides access to at least one culture compartment 307 bordered by the walls 302, 303 and 304 of the frame.
• the opening 306 extends in a longitudinal plane, which is substantially vertical according to the embodiment shown in the figures.
• the culture compartment 307 includes equipment making it possible to carry out the culture without soil.
• it comprises at least one growth support 308 fixed to the frame 301, optionally in a detachable manner.
• the growth medium 308 allows plants to hang on and develop in the presence of nutrients, also called inputs.
• unit 300 is particularly intended for aeroponics culture.
• the growth support 308 comprises at least one inert plate 309, that is to say it is made of a material which does not interact with the plant.
• the plate 309 separates in the culture compartment 307 a side 310 called root, that is to say a side in which the roots of a plant attached to the plate 309 are located, and a side 311 called plants, c That is, the side in which the stem (s) and leaf (s) of a plant hanging from plate 309 lie and grow.
• the plate 309 extends substantially parallel to the opening 306 of the frame, that is, it extends vertically.
• the plate 309 then comprises a plurality of holes 312, each hole 312 being through so that a plant placed in a hole 312 can have its roots on the root side 310 and its stems and / or leaves on the plant side 31 1.
• the axis of the holes 312 can be horizontal, that is to say perpendicular to the plane of the plate 309 or be inclined with respect to the horizontal direction, downwards from the root side, in order to promote the development of the plant which is naturally vertical.
• the plate 309 of the growth support 308 extends vertically over the entire height in the compartment 307. It can also extend over the entire width of the compartment 307. More preferably, the plate 309 is opaque, in order to avoid any light pollution from the side 31 1 of the plant towards the root side 310.
• plate 309 can extend horizontally. In this case, several plates 309 can be arranged in the culture compartment 307 in the manner of shelf boards.
• the growth medium 309 may comprise a container containing a substrate in which the roots of the plants develop.
• each culture unit 300 can include two culture compartments 307, which may or may not be identical.
• the two culture compartments 307 can be separated from one another by an intermediate wall 313 of the frame 301, the intermediate wall 313 being parallel to the side walls 302. This makes it possible, for example, to physically separate different species in each compartment 307, favoring the control of their development.
• each unit 300 further comprises an outlet 314, in practice a plurality of outlets 314, for a distribution system of a nutrient solution.
• the outlets 314 are for example injection nozzles making it possible to project the nutrient solution on the root side 310 of the culture compartment 307.
• the nutrient solution is typically water and a mixture of inputs, such as nitrogen, potassium, oxygen and potassium, or any other element necessary for the development of the plant.
• the nozzles are adjusted so as to project the nutrient solution in the form of a mist, that is to say droplets of a size suitable for being easily absorbed by the roots, as presented in the introduction.
• the nozzles are distributed so that the roots on the root side 310 are all affected by droplets, the mist being homogeneously formed on the root side.
• composition of the nutrient solution can be adapted according to measurements made in culture compartment 307, indicative of the condition of the plant, and / or according to a determined cycle.
• a device can be provided in order to isolate the root side 310 from the side 31 1 of the plant, in order to prevent part of the nutrient solution from unnecessarily going to the 31 1 side of the plant.
• a recovery system can be set up on the root side 310, making it possible to recover at least part of the solution not absorbed by the roots and to filter it in order to send it again to the roots.
• the unit 300 may further include equipment 315 for measuring at least one characteristic of the atmosphere of the culture chamber 307 and a system 316 for regulating said characteristic.
• the measuring equipment 315 may include in particular:
• the sensors 317, 318, 319 side 31 1 of the plant can be common to two or more units 300.
• the light sensor 317 can advantageously include a camera which also makes it possible to have a visual on the plants 31 1 side of the plant.
• the measuring equipment 315 may further include:
• the regulation system 316 is for example a controller housed in a lower compartment of the unit 300. It is connected to any device making it possible to vary the temperature, the humidity level and the brightness on the side 31 1 of the unit. plant, and the temperature and the humidity level on the root side 310 according to a regulation setpoint.
• the control system 316 preferably operates in real time, based on data from the measuring equipment 315.
• the lighting of the side 31 1 is achieved by means of a lighting device 322 for lighting the side 31 1 of the plant in the culture compartment 307.
• the lighting device 322 comprises, for example, horizontal arms 323 fixed to the frame 301.
• the arms 323 are fixed for example between each side wall 302 and the intermediate wall 313.
• the arms 323 each support an arrangement of LEDs, not shown in the figures, the LEDs being arranged facing the plate 309 of the growth support 308, and distributed so as to illuminate the stems and leaves of the plants attached to the plate 309 of uniformly, on the side 31 1 of plants.
• the regulation system 316 then acts on the intensity of the power supply to the LEDs in order to vary the brightness.
• the arms 323 can be articulated by contribution to the frame 301, for example using a ball joint, in order to change their orientation and / or to move them away from the plate 309 of the growth support 308 in order to facilitate access. to support 308.
• the regulation system 316 is connected to a ventilation device in the culture compartment 307.
• the control system 316 can also be provided to regulate the flow rate and pressure of the nutrient solution projected from the nozzles 314 into the root side 310.
• a unit 300 may further include a nutrient solution control system 324.
• the control system 324 makes it possible in particular to control the proportions of the inputs, that is to say the formula, of the nutrient solution, for example according to the measurements by the measuring equipment 315, according to the species of plants, according to a defined cycle or according to a manual adjustment.
• the control system 324 can be connected to the control system 316, so as to determine the proportions of the inputs based, for example, on the data of the measuring equipment 315.
• the regulation system 316 as well as the control system 324 may be common to several units 300.
• the 300 units are assembled in pairs to form 200 shelves.
• a rack 200 comprises two rows 201 of units 300 facing each other.
• Each row 210 comprises at least one, and in practice several cultivation units 300, as in the remainder of the description.
• 300 units in a row are integral with each other so that they can be moved together.
• two adjacent units 300 are in contact with each other along one of their side walls 302, and can be secured together.
• the units 300 of the same row 201 are oriented in the same direction, that is to say that their opening 306 is oriented in the same direction.
• the units 200 of a row 201 are substantially identical, so that their bottoms 305 can be in the same plane and, likewise, their openings 306 may be in the same plane.
• the grow compartment 307 of a first row unit 300 faces the grow compartment 307 of a second row unit 300.
• each culture compartment 307 of the units of a first row faces a culture compartment 307 of the units 300 of the second row 201.
• the openings 306 of the units 300 of a first row. row 201 are oriented in the same direction and in the opposite direction with respect to the openings 306 of the units 300 of the second row 201.
• the shelving 200 further comprises a device 202 for moving the two rows 201 relative to one another so that the shelving 200 can take two configurations:
• the shelving further comprising a sealing system 205 limiting air exchanges between the culture chamber 204 of the shelving in the closed configuration and the outside.
• the dimension of the corridor 203 when the rack 200 is in the open configuration is adapted to allow the movement of an operator, automatic or human, and to give him access to the culture compartments 307 of the units 300 of the rack 200.
• the operator can thus in particular harvest the plants on the growth support 308, or place new plants on the growth support 308.
• the sealing system 205 comprises for example a device for pressurizing the culture chamber 204, in order to limit the entry and exit of air with the outside.
• the overpressure device is for example connected to the system 316 for regulating a unit 300 which deactivates the overpressure when the shelving is in the open configuration.
• the sealing system 205 may alternatively or in combination comprise a seal, for example made of elastomer, extending around the culture chamber 204, when the shelving 200 is in the closed configuration.
• the joint is for example formed of two half-joints 206, each half-joint 206 being fixed to the units 300 of the two rows 201 of the shelving 200.
• the rack 200 can define a single culture chamber 204 formed by all of the culture compartments 307 of the units 300 of the rack.
• the shelving comprises several culture chambers 204.
• the culture compartment 307 of a unit 300 of the first row defines with the culture compartment 307 of a unit 300 of the second row a culture chamber 204.
• the sealing device 205 can provide a seal between the culture chambers 204. Any intermediate arrangement between these two cases is obviously conceivable.
• the culture chamber 204 is formed more precisely by the pooling of the side 31 1 of plants of the culture compartments 307 of the units of the two rows 201.
• the measuring equipment 315 already described can then be common to several units, in particular for measurements in a culture chamber 204. Indeed, the closed configuration of a shelving 204 is in principle the configuration which is implemented most of the time compared to the open configuration. The measuring equipment 315 can therefore monitor the characteristics of the atmosphere in the culture chamber (s) 204, and not in each culture compartment 307.
• the regulation system 316 may be common to several units.
• the devices making it possible to modify the characteristics of the atmosphere can also be common to several 300 units.
• the units 300 of a first row 201 of a rack 200 include a measuring equipment 315, a control system 316, and a lighting device 322, and the units 300 of the second row in are lacking.
• the displacement device 202 makes it possible to move the rows 201 of the shelving 200 in a sliding movement in a transverse direction, that is to say horizontal, substantially perpendicular to the plane of the opening. 306 of the units 300, in order to separate the two rows 200 from one another in the open configuration.
• the moving device 202 comprises, for example, a system 207 of rails and an actuator connected to the upper walls 303 of the units 300 to move the rows 201 along the rails.
• the device 202 can advantageously be used to pass there any connection and / or power cables from a central computer unit to each unit 300. All or part of the regulation system 316 can be integrated into the system. central computer unit, and a regulation command is then transmitted to each unit 300, by cables or not.
• the rail system 207 may include at least one base comprising guide rails.
• the base is intended to be fixed to a wall, for example of a frame in which the shelving 200 is intended to be installed. This is for example a vertical wall, floor or ceiling of the building.
• the units 300 of each row 201 then comprise a member complementary to the rails of the base.
• the cultivation system 100 includes at least two racks 200, arranged parallel to each other, each rack 200 being able to take an open configuration and a closed configuration.
• the culture units 300 of the culture system 100 are organized in module 101, 102.
• the system 100 comprises two types of modules:
• a first type of so-called intermediate module 101 comprising two cultivation units 300 as described above, secured to each other by the bottom 305 of their frame 301. More precisely, the two units 300 of an intermediate module 101 have their frame 300 in common, their funds 305 being common. Their openings 306 are then oriented in two opposite directions. The side walls 302, the upper walls 303 and the lower walls 304 of the two units 300 of a module 101 are merged, in the extension of each other from the common bottom 305.
• a second type of so-called end module 102 comprising a unit 300 as described above.
• the modules 101, 102 are arranged in rows so as to form rows 201 for the shelves 200.
• the culture system 100 successively comprises a first row of end modules 102, at least one row of intermediate modules 101, and a second row of end modules 102.
• the frames of the intermediate modules 101 are identical to the frames of the end modules 102, so that an end module comprises, in addition to the culture compartment 307 of a unit 300 culture, a secondary compartment 103.
• the secondary compartment 103 can be used to house, for example, the central computer unit, which comprises the regulation system 316, and / or the system 324 for controlling the nutrient solution for all the units 300 of the system. 100 of culture.
• the central computer unit which comprises the regulation system 316, and / or the system 324 for controlling the nutrient solution for all the units 300 of the system. 100 of culture.
• the secondary compartment 103 of a first row of end modules 102 can be used to place 104 germination tablets therein. In fact, before placing the plants on the growth support 308, they must have reached the stage of germination. This can be done in a less controlled environment than the rest of the crop. Thus, the secondary compartment 103 can be equipped for this purpose.
• the secondary compartment 103 of the second row of end modules 102 can then be used to place there the input reservoirs 105 as well as a pump system 106 connected to the nutrient solution distribution system to supply the nutrients. 300 units of culture in nutrient solution according to a formula determined by the control system 324.
• a cover 107 may be provided to close the secondary compartment 103 of each end module 102.
• Each row of module 101, 102 may comprise, on a side wall 302 of a module 101, 102 at the end of a row, a verification console 108, making it possible to monitor the characteristics of the atmosphere in the row.
• the console 108 can also include a control panel to allow an operator to act if necessary directly on the regulation of the characteristics of the atmosphere and / or on the supply of nutrient solution.
• system 316 for regulation may be common to several units 300, for example the units 300 of a row 201, of a rack 200, or even for all the units of the culture system 100.
• the regulation system 316 is connected to the sensors 317, 318, 319 on the side 31 1 of plants and to the sensors 320, 321 on the root side 310 of the culture compartment 307 of the unit.
• System 316 is also connected to lighting device 322.
• the unit 300 may further include a ventilation device 325, connected to the control system 316
• the control system 316 is further connected to the nutrient solution system 3264.
• the control system 324 comprises, according to this example, distributor 327 of inputs containing the various inputs.
• Dispenser 327 is fluidly connected to nutrient solution reservoir 328.
• the mixture of inputs is produced in the reservoir 328 from the distributor 327, the proportions of inputs being controlled for example by the regulation system 316.
• the nutrient solution is then sprayed into the culture compartment 307, preferably on the root side 310 using a pump 329.
• a filter 330 is interposed between the nutrient solution reservoir 328 and the pump 329 in order to avoid s' ensure that only particles smaller than a determined size reach the culture compartment 307.
• the pump 329 is associated with a booster 331 in order to ensure the spraying of the nutrient solution in the form of droplets of determined dimensions.
• the regulation system 316 is for this purpose connected to a pressure sensor 332 and a flow controller 333 at the inlet of the culture compartment 307
• the control system 316 can also be connected to a set 334 of sensors to monitor the nutrient solution in the reservoir 328, for example the temperature, the pH, the electroconductivity and the input composition of the solution. .
• the regulation system 316 then operates taking into account the information transmitted by the sensors 317, 318, 319, 320, 321 in the culture compartment 307 in order to adjust the characteristics of the atmosphere in the culture compartment 307 , in particular the power of the ventilation device 325, of the lighting device 322 or of a temperature control device according to a predetermined control command.
• the regulation system 316 can also perform regulation of the composition of the nutrient solution, for example based on sensor data, and / or based on a recorded regulation cycle. To this end, the regulation system 316 regulates the distributor 327 so that the composition of the nutrient solution in the reservoir 328 has the expected characteristics, in particular on the basis of the information transmitted by the set 334 of sensors. The nutrient solution with determined characteristics is then pumped and sprayed into culture compartment 307. The regulation system 316, from the data of the pressure sensor 322 and the state of the flow controller 33, makes it possible to regulate the power of the pump 329.
• the culture compartment 307 may include a recuperator for the excess nutrient solution, in order to reinject it into the nutrient solution reservoir 328 after possible passage through a filter 335.
• the regulation system 316 may be common to several units 300, or even to all of the units of the culture system 100. To this end, each unit can be identified in the regulation system 316, and the regulation setpoints can be adapted to each unit 300.
• the cultivation system 100 comprising the cultivation units 300 thus makes it possible to achieve soil-less cultivation in a controlled manner, by adapting to the needs of the plants.
• [1 1 1] the arrangement in units 300 makes it possible to create, for a shelving 220, one or more culture chambers 204, each culture chamber 204 having its own characteristics, adapted in particular according to the species of plants.
• the number of units 300 is easily adaptable by juxtaposing them, increasing the number of units per row per rack 200 and / or increasing the number of shelving.
• the control system 316 offers increased control of the parameters of the soilless culture, in particular of the characteristics of the atmosphere in the culture chambers 204, but also of the characteristics of the nutrient solution sprayed on the root side of the units. 300.

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• Life Sciences & Earth Sciences (AREA)
• Environmental Sciences (AREA)
• Hydroponics (AREA)
• Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=68072694

Family Applications (1)

Country Status (6)

Families Citing this family (2)

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• 2019
  • 2019-06-04 FR FR1905923A patent/FR3096869B1/fr active Active
• 2020
  • 2020-06-02 US US17/615,138 patent/US20220312701A1/en not_active Abandoned
  • 2020-06-02 CA CA3141439A patent/CA3141439A1/fr active Pending
  • 2020-06-02 EP EP20728784.8A patent/EP3979786A1/de not_active Withdrawn
  • 2020-06-02 WO PCT/EP2020/065247 patent/WO2020245134A1/fr unknown
  • 2020-06-02 CN CN202080041130.3A patent/CN113966168A/zh active Pending

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