EP3772315B1 - Dispositif de nettoyage - Google Patents

Dispositif de nettoyage Download PDF

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Publication number
EP3772315B1
EP3772315B1 EP20190092.5A EP20190092A EP3772315B1 EP 3772315 B1 EP3772315 B1 EP 3772315B1 EP 20190092 A EP20190092 A EP 20190092A EP 3772315 B1 EP3772315 B1 EP 3772315B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
pump
liquid
cleaning device
outlet nozzle
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.)
Active
Application number
EP20190092.5A
Other languages
German (de)
English (en)
Other versions
EP3772315A1 (fr
Inventor
Thomas Diehl
Eric Bosscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leifheit AG
Original Assignee
Leifheit AG
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 Leifheit AG filed Critical Leifheit AG
Publication of EP3772315A1 publication Critical patent/EP3772315A1/fr
Application granted granted Critical
Publication of EP3772315B1 publication Critical patent/EP3772315B1/fr
Active legal-status Critical Current
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/20—Mops
    • A47L13/22—Mops with liquid-feeding devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/02—Floor surfacing or polishing machines
    • A47L11/04—Floor surfacing or polishing machines hand-driven
    • A47L11/08—Floor surfacing or polishing machines hand-driven with rotating tools
    • A47L11/085—Floor surfacing or polishing machines hand-driven with rotating tools with supply of cleaning agents
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/02—Floor surfacing or polishing machines
    • A47L11/10—Floor surfacing or polishing machines motor-driven
    • A47L11/14—Floor surfacing or polishing machines motor-driven with rotating tools
    • A47L11/18—Floor surfacing or polishing machines motor-driven with rotating tools the tools being roll brushes
    • A47L11/185—Floor surfacing or polishing machines motor-driven with rotating tools the tools being roll brushes with supply of cleaning agents
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/02—Floor surfacing or polishing machines
    • A47L11/20—Floor surfacing or polishing machines combined with vacuum cleaning devices
    • A47L11/201—Floor surfacing or polishing machines combined with vacuum cleaning devices with supply of cleaning agents
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/408—Means for supplying cleaning or surface treating agents
    • A47L11/4088—Supply pumps; Spraying devices; Supply conduits
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles

Definitions

  • the invention relates to a cleaning device according to the preamble of claim 1.
  • the invention relates to a cleaning device with a fresh water tank, at least one outlet nozzle, a liquid inlet between the fresh water tank and the at least one outlet nozzle, a pump for conveying liquid from the fresh water tank to the outlet nozzle and a control device for controlling the cleaning device in a cleaning mode.
  • wet / dry vacuum devices are understood as cleaning devices. These cleaning devices preferably have several outlet nozzles with very small diameters, preferably with diameters smaller than 1.3 mm.
  • a cleaning device of the type mentioned above is from the GB 2 453 139 A known.
  • the known cleaning device has a fresh water tank and an outlet nozzle, wherein liquid, in particular water or cleaning liquid, is conveyed with the pump through the outlet nozzle.
  • liquid in particular water or cleaning liquid
  • the inlet line between the pump and the outlet nozzle is not vented in the generic devices, so that after the cleaning device has been switched off, residual liquid still remains in the inlet line and in the outlet nozzle.
  • the residual liquid dries and, depending on the degree of hardness of the liquid used, leaves limescale residues in the outlet nozzles or the supply line.
  • the lime residue can partially or completely close the outlet nozzle in a short time, which limits the functionality of the cleaning device.
  • the cleaning devices must be descaled more frequently in order to ensure that they are functional and also to avoid damage to the cleaning device that may be associated with the decalcification.
  • a care device for bowling lanes is known in which care fluid is drawn in via air nozzles which are constructed in the manner of a jet pump and which suck in care fluid in the air nozzle via a negative pressure and spray it onto the ground as a misted fluid / air mixture.
  • dripping of the care fluid is avoided by first interrupting the fluid flow and only later the air flow.
  • the object of the invention is to provide a cleaning device which overcomes the above-mentioned disadvantages in a simple and inexpensive manner.
  • the cleaning device now also has a device cleaning mode and the control device is designed in such a way that in the device cleaning mode the pump is initially actuated in a rinsing phase in order to pump liquid from the fresh water tank and then in a drying phase such compressed air through the supply line and the at least one Outlet nozzle is pumped so that the liquid is dried in the outlet nozzle or the outlet nozzles.
  • the compressed air can preferably be provided by the pump, with air for providing the compressed air in the drying phase in particular being able to be taken from the liquid tank by the pump.
  • the device cleaning mode has the advantage that it can be carried out particularly quickly and easily. As a result, the user of the device is more inclined to perform it regularly and the risk of premature calcification of the outlet nozzle of the cleaning device is significantly reduced.
  • the cleaning device advantageously has an additional decalcifying mode in which the device is decalcified with a decalcifying agent can be. However, this takes much longer than the device cleaning mode, which only takes 1 to 2 minutes.
  • the regular decalcification or maintenance intervals can be selected longer, which saves time and effort.
  • the control device is particularly preferably set up to carry out the device cleaning mode in a time-controlled manner.
  • the fresh water tank of the cleaning device is advantageously filled up to a device cleaning level. Then the fresh water tank is first emptied during the rinsing phase. The pump then sucks in air from the empty tank, which is then made available as compressed air for the drying phase.
  • a particularly user-friendly embodiment of the invention provides that the cleaning device has a level detection of the fresh water tank and the control device is set up in such a way that the drying phase is carried out in a time-controlled manner when the level in the liquid tank falls below a predefined threshold. This has the advantage that the user does not have to fill the cleaning device exactly up to the device cleaning level.
  • the rinsing phase is then operated until the fresh water tank is empty.
  • the drying phase is then initiated in a time-controlled manner by the control device.
  • a time control of the device cleaning mode, in particular the drying phase is advantageous and may be necessary, depending on the type of pump, to avoid damage to the pump, since the cooling liquid is missing in the drying phase.
  • the cleaning device has a cleaning brush and / or a cleaning roller.
  • the outlet nozzle is or the outlet nozzles are designed and arranged such that the cleaning brush and / or cleaning roller can be applied to the cleaning brush or cleaning roller for a cleaning operation with liquid from the outlet nozzle.
  • the cleaning brush or the cleaning roller is then cleaned and cleaned in accordance with the procedure described above at least partially dried. This contributes positively to the durability of the cleaning brush or the cleaning roller.
  • the cleaning device preferably has a level detection of the fresh water tank and the control device is set up in such a way that the pump switches off in the cleaning mode after the level in the liquid tank falls below a defined threshold and a time-controlled sequence is provided for the device cleaning mode, the device being switched off when the level falls below the Level threshold is deactivated.
  • the device cleaning mode is an operating mode that is to be differentiated from the cleaning mode and which must preferably be actively switched on by the user of the device.
  • the control device is preferably set up in such a way that actuation of an actuation element assigned to the cleaning device triggers the device cleaning mode.
  • the actuating element can in particular be arranged on the cleaning device.
  • a switch is provided on the cleaning device to switch the cleaning device on and off.
  • the actuating element can be formed by the switch, the cleaning device being transferred to the device cleaning mode by the control device only through a defined actuation sequence, in particular by actuating the switch over a period of a few seconds.
  • An advantageous embodiment of the cleaning device provides that the control is set up in such a way that the pump is operated intermittently in the rinsing phase of the device cleaning mode, in particular with two switch-on phases and two switch-off phases of the pump, the switch-on phases preferably being shorter than the switch-off phases. Furthermore, it can be provided that the pump and the control device are set up in such a way that they are operated in the rinsing phase and / or in the drying phase of the device cleaning mode with a volume flow of 220 ml / s.
  • the cleaning devices in particular when designed as a wet / dry vacuum device, preferably provide that the cleaning brush or the cleaning roller can be controlled separately.
  • the control device can be set up in such a way that the cleaning brush or the cleaning roller is operated continuously in the rinsing phase, the cleaning brush or the cleaning roller, in particular, being operated at maximum speed.
  • a defined amount of liquid is required, which should preferably be provided in the fresh water tank.
  • means are preferably provided which display and / or detect the amount of liquid required for the rinsing phase.
  • the amount of liquid required for the rinsing phase is preferably detected separately by evaluating the level detection.
  • a separate pressure accumulator can be provided to provide the compressed air in the drying phase of the device cleaning mode.
  • the compressed air reservoir is preferably arranged between the pump and the outlet nozzle.
  • the pressure accumulator can, for example, also be formed by the feed line, wherein for example a shut-off means in the form of a switchable valve can be provided between the pump and the outlet opening.
  • the compressed air reservoir can preferably be filled by the pump.
  • FIG. 1 an inventive wet / dry suction device 1 with control device 13 is shown.
  • the wet / dry vacuum device 1 is designed here as a so-called stick device, ie it has a handle 5, at the upper end of which a handle 4 is provided, via which the user can switch on and guide the wet / dry vacuum device 1.
  • a housing 2 is provided, in which a dirty liquid tank 7 is removably arranged.
  • the wet / dry suction device 1 shown here is not just a suction device, but is designed as a combination device for cleaning and then vacuuming hard surfaces. For the cleaning function, it has a fresh water tank 6 in which fresh water or cleaning liquid is stored for supply to an application device which is arranged in the front functional area in addition to the lower suction nozzle 3.
  • An actuating switch 14 is provided in the area of the handle 4.
  • the Figure 2 shows a schematic representation of the liquid flow in the wet / dry suction device from Figure 1 in one possible embodiment.
  • the liquid guide comprises the liquid tank 6, a pump 8, inlet lines 9 and the outlet nozzle 10.
  • the application device in the form of a cleaning roller 11 is provided with a textile covering as a cleaning cover 12.
  • a control device 13 of the cleaning device 1 is also shown, via which the wet / dry suction device is controlled.
  • the arrangement and configuration of the components are shown purely schematically. For example, instead of the illustrated outlet nozzle 10, a plurality of nozzles and / or other nozzle shapes can also be provided.
  • the pump 8 pumps liquid from the liquid tank 6 through the feed lines 9 into the outlet nozzle 10 and from there it is applied to the cleaning roller 11, whereby the cleaning cover 12, which is designed as a textile cover, is moistened.
  • the cleaning roller 11 is mechanically connected to an electric motor which sets the cleaning roller 11 in rotation.
  • a separate roller motor is preferably provided as the electric motor only for driving the cleaning roller 11.
  • the speed of the cleaning roller 11 can be regulated. As a result of the rotation of the cleaning roller 11, it is evenly moistened by the outlet nozzle 10.
  • the control device 13 is set up to control the pump 8, the roller motor (not shown) and also the suction unit (also not shown) of the wet / dry suction device 1 as a function of an operating mode of the cleaning device 1.
  • the wet / dry vacuum device 1 now has a cleaning mode and a device cleaning mode as operating modes.
  • the pump 8 pumps liquid from the liquid tank 6 through the feed line 9 into the outlet nozzle 10 and from there applied to the cleaning roller 11.
  • the roller motor drives the cleaning roller 11, as a result of which the cleaning cover 12, which is designed as a textile cover, is moistened.
  • the suction unit not shown here.
  • the device cleaning mode must be switched on by the user of the wet / dry vacuum device 1.
  • the actuating button 14 for switching on the wet / dry vacuum device 1 is assigned twice. A longer pressing of the actuating button 14 causes the control device 13 to transfer the wet / dry vacuum device 1 to the device cleaning mode.
  • the device cleaning mode comprises at least a rinsing phase and a drying phase.
  • the rinsing phase on the one hand the supply lines 9 and the outlet nozzle 10, but also the cleaning cover 12 of the cleaning roller 11, which is formed by the textile covering, are rinsed and thus cleaned.
  • compressed air is pumped through the feed line 9 and the outlet nozzle 10 against the cleaning roller 11. In this way, the inlet line 9 and the outlet nozzle 10 are freed from the remaining liquid.
  • the cleaning cover 12 of the cleaning roller 11 is also at least partially dried.
  • a defined amount of liquid must be provided in the liquid tank 6 to carry out the rinsing phase.
  • an indicator marking can be provided on the liquid tank 6, up to which the liquid tank 6 must be filled for the device cleaning mode.
  • the liquid tank 6 is completely emptied during the rinsing phase.
  • the drying phase takes place.
  • the pump 8 sucks in air from the empty liquid tank 6 and pushes it through the inlet line 9 and the nozzle 10.
  • the pump 8 is set up so that it can apply sufficient pressure for proper drying.
  • the supply of compressed air by the pump 8 can also be supported by a compressed air reservoir and / or a valve circuit.
  • the embodiment described represents a particularly simple solution that does not require any additional sensors.
  • the fill level can also be detected by one or more sensors.
  • control sequence includes the control of the pump 8, the roller motor, the suction unit and an LED for displaying the operating mode by the control device 13.
  • the device cleaning mode 16 is initiated by pressing the actuating button 14 for a longer period of time.
  • the user is visually and haptically made aware of the beginning of the device cleaning operation.
  • the LED on the cleaning device 1 is activated to flash and the cleaning roller 11 is switched to a warning mode 16, with the roller motor causing the cleaning roller 11 to vibrate in a clocked mode in the warning mode 16.
  • the rinsing phase is then carried out.
  • the control device 13 switches on the suction unit, the roller motor and the pump 8.
  • the cleaning roller 11 is operated at maximum speed during the entire rinsing phase.
  • the pump 8, on the other hand, is switched on and off alternately.
  • the control device 13 initiates the drying phase. This initially includes briefly switching off the suction unit and roller motor. Then both are switched on again, as can be seen from Table 1. The roller motor rotates again at maximum speed. The end of the drying phase is then made known to the user haptically by the warning mode 16 of the roller motor. The pump 8 is operated at full power during the entire drying process and thus generates the compressed air for drying. The device cleaning mode is ended by switching off all motors and the LED by the control device 13.
  • the top graph forms the LED control signal 20 of the LED. This is shown on a different time scale than the three other graphs below. The graph is only intended to show the blinking of the LED during operation.
  • the second graph forms the suction unit control signal 22 of the suction unit
  • the third graph forms the brush control signal 24 of the cleaning roller 11
  • the fourth graph of the Figure 3 shows the pump control signal 26 of the pump 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)

Claims (11)

  1. Dispositif de nettoyage (1), en particulier dispositif de nettoyage (1) sous la forme d'un dispositif d'aspiration humide/sec, comportant
    • un réservoir d'eau fraîche (6),
    • au moins une buse de sortie (10),
    • une conduite d'alimentation (9) entre le réservoir d'eau fraîche (6) et la buse de sortie (10),
    • au moins une pompe (8) pour transporter le liquide du réservoir d'eau fraîche (6) à la buse de sortie (10), et
    • un dispositif de commande (13) pour commander le dispositif de nettoyage (1) dans un mode de nettoyage dans lequel le dispositif de nettoyage (1) est utilisé comme prévu pour le nettoyage de surfaces,
    caractérisé en ce que
    l'dispositif de nettoyage (1) est configuré pour mettre à disposition et faire fonctionner un mode de nettoyage d'dispositif avec au moins une phase de rinçage et au moins une phase de séchage, le dispositif de commande (13) étant conçu de telle sorte que l'dispositif de nettoyage (1)
    • dans la phase de rinçage, à pomper du liquide à travers le tuyau d'entrée (9) et la buse de sortie (10) via la pompe (8), et
    • dans la phase de séchage, souffler de l'air comprimé à travers le tuyau d'entrée (9) et la buse de sortie (10) par l'intermédiaire de la pompe (8) ou d'un dispositif de pompage supplémentaire de telle sorte qu'au moins la buse de sortie (10) soit asséchée de liquide,
    dans lequel le dispositif de commande (13) est configuré de telle sorte que, dans le mode de nettoyage de l'dispositif, l'dispositif de nettoyage (1) fonctionne d'abord dans une phase de rinçage et finalement dans une phase de séchage.
  2. Dispositif de nettoyage (1) selon la revendication 1, caractérisé en ce que la pompe (8) est conçue comme une pompe à liquide et à air et que, dans la phase de séchage, l'air comprimé est pompé par la pompe (8).
  3. Dispositif de nettoyage (1) selon la revendication 1 ou 2, caractérisé en ce que l'air comprimé est pompé du réservoir de liquide (6) et fourni par la pompe (8).
  4. Dispositif de nettoyage (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (13) est configuré pour une exécution commandée dans le temps du mode de nettoyage du dispositif.
  5. Dispositif de nettoyage (1) selon la revendication précédente, caractérisé en ce que l'dispositif de nettoyage (1) comprend une détection du niveau de remplissage du réservoir d'eau fraîche (6) et le dispositif de commande (13) est configuré de telle sorte que lorsque le niveau de remplissage du réservoir de liquide (2) passe en dessous d'une valeur seuil prédéfinie, la phase de séchage est exécutée de manière commandée dans le temps.
  6. Dispositif de nettoyage (1) selon l'une des revendications précédentes, caractérisé en ce que l'dispositif de nettoyage (1) comprend une brosse de nettoyage et/ou un rouleau de nettoyage (11) et la buse de sortie (10) est conçue de telle sorte que du liquide est appliqué sur la brosse de nettoyage et/ou le rouleau de nettoyage (11) pour une opération de nettoyage, la brosse de nettoyage et/ou le rouleau de nettoyage (11) étant nettoyés en mode de nettoyage de l'dispositif dans la phase de rinçage et étant au moins partiellement séchés dans la phase de séchage.
  7. Dispositif de nettoyage (1) selon la revendication 5, caractérisé en ce que la brosse de nettoyage et/ou le rouleau de nettoyage (11) sont conçus pour être commandés séparément et le dispositif de commande (8) est configuré de telle sorte que la brosse de nettoyage et/ou le rouleau de nettoyage (11) sont actionnés en continu dans la phase de rinçage, la brosse de nettoyage et/ou le rouleau de nettoyage (11) étant actionnés en particulier à la vitesse maximale.
  8. Dispositif de nettoyage (1) selon l'une des revendications précédentes, caractérisé en ce que l'dispositif de nettoyage (1) comporte une détection du niveau de remplissage du réservoir d'eau fraîche (6) et la commande (8) est réglée de telle sorte que la pompe (8) est arrêtée en mode de nettoyage après que le niveau de remplissage du réservoir de liquide (2) est descendu en dessous d'une valeur seuil prédéfinie et que la pompe (8) n'est pas arrêtée en mode de nettoyage de l'dispositif après que le niveau de remplissage du réservoir de liquide (2) est descendu en dessous d'une valeur seuil prédéfinie.
  9. Dispositif de nettoyage (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de nettoyage (1) présente un élément d'actionnement et le dispositif de commande (13) est configuré de telle sorte que l'actionnement de l'élément d'actionnement permet de déclencher le mode de nettoyage du dispositif.
  10. Dispositif de nettoyage (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (8) est réglé de telle sorte que la pompe (8) est exploitée de manière intermittente dans la phase de rinçage du mode de nettoyage de l'dispositif, en particulier avec deux phases de mise en marche et deux phases d'arrêt de la pompe (8).
  11. Dispositif de nettoyage (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif de nettoyage (1) comporte des moyens d'affichage qui sont capables d'afficher une quantité de liquide nécessaire pour la phase de rinçage.
EP20190092.5A 2019-08-09 2020-08-07 Dispositif de nettoyage Active EP3772315B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019121612.5A DE102019121612B3 (de) 2019-08-09 2019-08-09 Reinigungsgerät mit Gerätereinigungsmodus

Publications (2)

Publication Number Publication Date
EP3772315A1 EP3772315A1 (fr) 2021-02-10
EP3772315B1 true EP3772315B1 (fr) 2021-04-28

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ID=71995867

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EP20190092.5A Active EP3772315B1 (fr) 2019-08-09 2020-08-07 Dispositif de nettoyage

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EP (1) EP3772315B1 (fr)
DE (1) DE102019121612B3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114631757B (zh) * 2020-12-15 2024-01-16 添可智能科技有限公司 地刷装置及清洁设备
CN115844272A (zh) * 2021-11-25 2023-03-28 尚科宁家(中国)科技有限公司 一种表面清洁机的自清洗方法
CN114224235A (zh) * 2022-01-06 2022-03-25 帝舍智能科技(武汉)有限公司 一种拖扫一体清洁工具及控制方法
CN114468890B (zh) * 2022-01-07 2023-09-12 北京石头世纪科技股份有限公司 清洁设备的储液箱及清洁设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418672A (en) * 1962-04-19 1968-12-31 D B A Products Company Inc Bowling lane maintenance device
GB2453139A (en) * 2007-09-26 2009-04-01 Linda Corderoy Cleaning apparatus

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EP3772315A1 (fr) 2021-02-10
DE102019121612B3 (de) 2020-10-15

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