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US-20260124561-A1 - WATER RECYCLING DEVICE WITH FILTRATION TANK

US20260124561A1US 20260124561 A1US20260124561 A1US 20260124561A1US-20260124561-A1

Abstract

A water recycling device comprising a filtration tank, the filtration tank comprises a process inlet for providing process wash water to the filtration tank. The filtration tank comprises a filter comprising a circumferential screen separating a filter-side portion of the filtration tank from a non-filter side portion of the filtration tank, and a rotatable backflushing arm for providing a stream of backflushing water at the filter-side portion of the circumferential screen. The filtration tank further an outlet for receiving filtered process wash water from the filter-side portion of the filtration tank.

Inventors

  • Carl Emil VESTMAN
  • Jonathan KNUTSSON

Assignees

  • MIMBLY AB

Dates

Publication Date
20260507
Application Date
20231002
Priority Date
20221006

Claims (16)

  1. 1 - 15 . (canceled)
  2. 16 . A water recycling device for recycling process wash water, the water recycling device ( 1 ) comprising a filtration tank, the filtration tank comprising: a process inlet for providing process wash water to the filtration tank, a filter comprising a circumferential screen separating a filter-side portion of the filtration tank from a non-filter side portion of the filtration tank, a rotatable backflushing arm for providing a stream of backflushing water at the filter-side portion of the circumferential screen, and, an outlet for receiving filtered process wash water from the filter-side portion of the filtration tank.
  3. 17 . The water recycling device according to claim 16 , wherein the filtration tank comprises an inlet for providing water to the filter-side portion, the inlet in fluid connection to the rotatable backflushing arm.
  4. 18 . The water recycling device according to any of claim 17 , wherein the device comprises a water quality sensing unit comprising an inlet for receiving water, and an outlet, and wherein the outlet is in connection with the inlet of the filtration tank such that water from the outlet of the water quality sensing unit is directed to the rotatable backflushing arm.
  5. 19 . The water recycling device according to claim 16 , wherein the rotatable backflushing arm is rotated by the pressure of water flowing through the arm provided via the inlet.
  6. 20 . The water recycling device according to claim 18 , wherein the amount of water provided to the rotatable backflushing arm is controllable based on the water quality measured by the water quality sensing unit.
  7. 21 . The water recycling device according to claim 18 , wherein the measured water quality comprises water turbidity.
  8. 22 . The water recycling device according to claim 16 , wherein the filtration tank comprises a cap, and wherein the filter is connected to the cap via an extension element, the extension element connected to the cap at a proximal portion and to the filter at a distal portion such that the filter is positioned in the lower portion of the filtration tank.
  9. 23 . The water recycling device according to claim 16 , wherein the extension element comprises a solid wall for restricting the ingress of water, and a substantially hollow inner portion, and wherein the inlet to the backflushing arm extends through the hollow inner portion.
  10. 24 . The water recycling device according to claim 22 , wherein the water quality sensing unit is provided within the hollow inner portion of the extension element.
  11. 25 . The water recycling device according to claim 16 , wherein the filtration tank comprises a waste outlet provided at the base of the non-filter side portion of the tank for receiving residue backflushed from the filter.
  12. 26 . A method for filtering process wash water from a water consumption device in a filtration tank according to claim 17 , the method comprising: a.) providing process wash water in the filtration tank via the process inlet, b.) filtering the water via the filter and therein receiving filtered process wash water in the filter-side portion of the filtration tank, c.) receiving filtered process wash water at the outlet, and d.) providing water to the rotatable backflushing arm via the inlet to backflush residue from the non-filter side facing portion of the filter screen.
  13. 27 . The method according to claim 26 , wherein the method comprises: e.) pausing the provision of process wash water in the filtration tank such that the water level in the filtration tank is reduced as water is received at the outlet, f.) performing step d., g.) providing a momentary spray of water to a spray head provided to the filtration tank, such that backflushed residue is displaced from the non-filter side portion of the screen, and h.) receiving residue at a waste outlet provided at the base of the non-filter side portion of the tank.
  14. 28 . The method according to claim 26 , wherein the method comprises: measuring the quality of the water provided prior to provision to the inlet via a water quality measurement unit.
  15. 29 . The method according to claim 28 , wherein the measuring step comprises: providing white light via a white light emitting element, providing infra-red light via an infra-red light emitting element, receiving the white light and infra-red light at a light receiving element, and, analysing the received white and infra-red light to determine the colour and turbidity of the water.
  16. 30 . The method according to claim 26 , wherein the method comprises: i.) providing the filtered process wash water to a water consumption device such as a washing machine and/or dishwasher such that the water is reused.

Description

FIELD OF THE INVENTION The present disclosure relates to a water recycling device. In particular it relates to a water recycling device comprising a filtration tank comprising a filter, and a rotatable backflushing arm. BACKGROUND OF THE INVENTION Fresh water is a scarce resource, only between 0.01% to 2.75% of the water on earth is fresh water. Water processing devices, such as laundry machines and dishwashers etc. may use up to 100 L of fresh water in a single washing process. Recycling water used in water processing devices is therefore important. Water recycling devices receive used process water and retain the water for later use. Such a water recycling device is described in WO 2019/117789 A1. The device of WO 2019/117789 A1 receives water from a water consumption device, and then stores or disposes water based on the measured water quality. The water stored may be distributed to the water consumption device. In the device the filtering, measuring and storage of water occurs a single time. Filtering particulate debris from process wash water is an especially important aspect of water recycling as debris, such as textile particles, can sully water and lead to reduced recycling performance. Furthermore, textiles made of synthetic materials may leech microplastics. Microplastics from synthetic textiles may subsequently enter and pollute waterways and oceans. Improved devices which are capable of receiving and recycling greater volumes of water would be ideal. SUMMARY OF THE INVENTION Accordingly, the present invention preferably seeks to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solves at least the above mentioned problems by providing a water recycling device for recycling process wash water comprising a filtration tank, the filtration tank comprises a process inlet for providing process wash water to the filtration tank. The filtration tank comprises a filter comprising a circumferential screen separating a filter-side portion of the filtration tank from a non-filter side portion of the filtration tank, and a rotatable backflushing arm for providing a stream of backflushing water at the filter-side portion of the circumferential screen. The filtration tank further an outlet for receiving filtered process wash water from the filter-side portion of the filtration tank. A method for filtering process wash water is also provided. Further advantageous embodiments are disclosed in the appended and dependent patent claims. BRIEF DESCRIPTION OF THE DRAWINGS These and other aspects, features and advantages of which the invention is capable will be apparent and elucidated from the following description of embodiments of the present invention, reference being made to the accompanying drawings, in which FIG. 1A and B show a schematic view of a water recycling system comprising a water recycling device and a water collection unit. FIG. 1A and B are separated by the dotted-and-dashed line A which defines the cut point of the two figures. FIG. 1A is a schematic view of a water recycling device according to an aspect. FIG. 1B is a schematic view of a water collection unit showing according to an aspect. The WCD being a Water Consumption Device, such as a washing machine and/or dishwasher. FIG. 2A is a schematic partial cross-section of a filtration tank according to an aspect. FIG. 2B is a schematic top-down view of a rotatable backflushing arm according to an aspect. FIG. 3A is a schematic top-down view of a water quality sensing device according to an aspect. The dotted region represents water in the receptacle. FIG. 3B is a schematic side-view of a water quality sensing device according to an aspect. The dotted region represents water in the receptacle. FIG. 4 is a schematic partial cross-section of a filtration tank according to an aspect. DETAILED DESCRIPTION The present disclosure relates to a water recycling system comprising a water recycling device 1. The water recycling device 1 comprises a filtration tank 100 for receiving and filtering processed wash water. The device 1 comprises a manifold 200. The manifold 200 is provided with a plurality of inlets 201, a plurality of valves 202, and a plurality of outlets 203 for distributing water from the manifold 200. The recycling device 1 comprises a storage tank 300 for receiving and storing processed water. The storage tank receives water from at least the filtration tank 100. The water received in the storage tank 300 is received via a first outlet 203a of the manifold 200. The manifold 200 comprises at least one inlet 201a such that water may be received from the storage tank 300 into the manifold 200. The manifold 200 comprises a second outlet 203b in connection with the filtration tank 100, such that water may be circulated through the water recycling device 1. Processed water is receivable in the filtration tank 100, the water is distributed to the storage t