Automated laundry system and method

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No. 60/94,384, filed 17 Dec. 2019.

BACKGROUND

Field of Invention

The invention relates generally to laundering clothes or other textiles. More specifically, but not by way of limitation, embodiments of the invention provide improvements in automated laundry systems and methods.

Description of the Related Art

Clothes laundering is generally accomplished via a predefined sequence of process steps, for instance: washing (often with presoak, followed by agitation in soapy water), rinsing (usually with spinning and draining), and drying. Typically, “washing machines” are used for washing and rinsing; “dryers” are used for drying. This separation in processing introduces certain inefficiencies association with manual transfer of laundry between washing machines and dryers. Such inefficiencies may be especially disadvantageous in commercial and institutional settings.

Systems and methods for continuous flow laundering of clothes or other textiles are known in the art. But such systems generally suffer from large floor space requirements, inefficient consumption of resources (water and power), and/or a lack of mechanisms and process controls for handling small batches. An improved laundering system and method is urgently needed.

SUMMARY OF THE INVENTION

The invention seeks to overcome one or more limitations of prior art laundry systems and methods noted above. In embodiments of the invention, cartridge bins of laundry are disposed into drums for continuous flow (progressive) laundry processing. Each drum is supported by a carriage; the carriage is configured to articulate the drum and to cooperate with a space-saving processing track.

DESCRIPTION OF THE DRAWINGS

Embodiments of the invention are illustrated in the drawings, wherein:

FIG. 1 is an isometric view of a laundry system;

FIG. 2 is a rear isometric view of the laundry system;

FIG. 3 is a top view of the laundry system;

FIG. 4 is a rear elevation view of the laundry system;

FIG. 5 is a right end elevation view of the laundry system;

FIG. 6 is a left end elevation view of the laundry system;

FIG. 7 is a front elevation view of the laundry system;

FIG. 8 is an isometric view of a laundry retrieval station;

FIG. 9 is an isometric view of a customer loading kiosk;

FIG. 10A is an end view of a drum and carriage assembly;

FIG. 10B is a side view of a drum and carriage assembly;

FIG. 11 is an exploded assembly view of a drum;

FIG. 12 is an exploded assembly view of a carriage;

FIG. 13 is a sensor & control diagram for a washing station;

FIG. 14 is a sensor & control diagram for a drying station;

FIG. 15 is a sensor & control diagram for a carriage and drum;

FIG. 16 is an electrical schematic diagram for a track;

FIG. 17 is a functional block diagram for controlling the laundry system; and

FIGS. 18A and 18B are a process flow diagram of a laundry process.

DETAILED DESCRIPTION

This section describes embodiments of the invention with reference to FIGS. 1-18B. Such embodiments are meant to be illustrative and not restrictive. Dimensions are not implied. In the drawings, reference designators are generally reused for the same or similar features. Some features may be simplified, omitted, or not specifically referenced for descriptive clarity. Although sub-headings are used below for organizational convenience, disclosure of any particular feature is not necessarily limited to any section.

System Overview

With particular reference to FIGS. 1-9, an illustrative laundry system includes multiple cartridge bins 6 to contain clothing or other textile items; this facilitates controlled small-batch processing. The cartridge bins 6 are preferably cylindrical in shape, with one open end, and constructed with perforated walls, as shown. Each cartridge bin 6 may be stored in cartridge bin storage area 3, shuttled via smart independent conveyor belt 4, and loaded into a corresponding washing drum 5 via cartridge loading jack 14.

Washing drum frame 7 supports and contains an oval track 28. The oval track 28 is preferably disposed in a vertical orientation (as shown) to limit floor space. In embodiments of the invention, each washing drum 5 is supported by a self-driven carriage 27 (best illustrated in FIGS. 10A, 10B, and 12) to articulate the washing drum 5 (e.g., to tilt the drum with respect to a radial axis) and to also advance the washing drum 5 along the track 28 through a sequence of laundry processing stations. Hitch connecting assemblies 10 maintain spacing between successive carriages 27 on the track 28.

The illustrated embodiment includes several supporting laundry processing components, namely hot water tank 1, furnace 2, intermediate bulk container (IBC) detergent totes 8, cold water tank 9, and dryer hood assembly (not shown). The illustrated laundry system also includes a customer loading kiosk (illustrated in FIGS. 1 and 9, and including touch screen display 24, basket platform 25, and privacy wall 26) and a laundry retrieval station (illustrated in FIGS. 1 and 8, including lights 15, privacy wall 16, clothing dispensing hole 17, observation window 18, hood 20, basket table 21, window 22 and upper wall 23).

Variations to the laundry system embodiment illustrated in FIGS. 1-9 and described above are possible. For example, in alternative embodiments, the oval track 28 could be horizontally disposed rather than vertically disposed. Moreover, the customer loading kiosk and/or laundry retrieval station could be eliminated in a semi-automated environment, or reconfigured, according to application requirements. Conventional components such as hot water tank 1, furnace 2, IBC detergent totes 8, and/or cold water tank 9 could be repositioned according to design choice.

Drum and Carriage

FIGS. 10A, 10B, 11, and 12 illustrate additional details of the washing drum 5 and the carriage 27, according to an embodiment of the invention. Each washing drum 5 preferably includes a rotating inner drum 11 and a rotating outer drum 12 (nested cylinders, each having one open end). The cartridge bin 6 is configured to couple to the inner drum 11 during processing (a closed end of the cartridge bin 6 securing clothing or other textiles within the inner drum 11). The Inner drum 11 is configured to rotate about its longitudinal axis, for instance to support bi-directional agitation during a wash cycle, high-speed uni-directional rotation during a spin (water removal) cycle, and a low-speed unidirectional tumble during a drying cycle. Outer drum 12 (and thus the contained inner drum 11 as well) is configured to tilt about a radial axis, for example to retain water or discharge the cartridge bin 6 after processing.

Controls

FIG. 13 is a sensor & control diagram for a washing station disposed along the track 28; FIG. 14 is a sensor & control diagram for a drying station disposed along the track 28, and FIG. 15 is a sensor & control diagram for a carriage 27 and drum 5. “RS485” refers to a physical layer communications standard (also known as TIA-485 or EIA-485), but other suitable suitable physical connections and various communication protocols could also be used. For instance, in alternative embodiments, carriages 27 and other components could communicate via radio frequency (RF), free-space optical (FSO), or other wireless methods.

Power distribution can be understood for the illustrated embodiment with reference to FIGS. 15 and 16. 48 VDC is supplied to the track 28 by multiple power supplies 29 that are each coupled to a 120 VAC source. Each carriage 27 uses a brush contact transfer interface to receive 48 VDC power from the track 28.

FIG. 17 illustrates data collection and commands that may be associated with a variety of user types. Preferably, the laundry system supports fully automated payment processing, individualized process control, item tracking, and secure delivery of laundered goods. But a wide range of automated and semi-automated controls are possible.

Processes

From the perspective of the laundry system, the process may include one or more of the following steps (illustrated as process step groups 1805 and 1810 in FIGS. 18A and 18B, respectively):

• • receiving items to be laundered from a user into a cartridge bin at a loading kiosk
  • presenting laundry processing options to the user
  • receiving user selections based on the presented processing options
  • presenting a payment screen to the user based on the user selections
  • receiving user payment information
  • processing user payment based on the user payment information
  • [if payment processing is not successful] aborting the process
  • [if payment processing is successful] assigning a priority code to the cartridge bin (e.g., based on FIFO, expedite fee, and/or other criteria)
  • determining whether to process the cartridge bin immediately (e.g., based on the priority code and equipment status)
  • [if not immediate] transporting the cartridge bin to storage via a conveyor belt
  • selecting the cartridge bin for processing based at least in part on the priority code
  • [if immediate, or once selected] transporting the cartridge bin to a pre-soak station via the conveyor belt
  • [if appropriate based on the user selections] presoaking the cartridge bin
  • transporting the cartridge bin to a cartridge loading jack via the conveyor belt
  • presenting a washing drum to the cartridge loading jack via a carrier and track
  • loading the cartridge bin to the washing drum using the cartridge loading jack
  • transporting the cartridge bin to a washing station via the washing drum, carriage, and track
  • tilting the washing drum (for instance at an angle 30-45 degrees from horizontal to retain water)
  • injecting water solution (quantity, temperature, and additives based on the user selections)
  • agitating (inner drum+cartridge bin), rinsing, and high-speed spinning (inner drum+cartridge bin) based on the user selections
  • [if appropriate based on the user selections] transporting the cartridge bin to a drying station via the washing drum, carriage, and track (preferably on an upper portion of the track)
  • [if appropriate based on the user selections] coupling hot air to the washing drum
  • begin low-speed tumble (inner drum+cartridge bin)
  • decoupling hot air from the washing drum based on measured humidity
  • transporting the cartridge bin to a discharge station via the washing drum, carriage, and track
  • terminating the tumbling
  • discharging the cartridge bin to the conveyor belt (to include tilting the washing drum)
  • transporting the cartridge bin to storage via the conveyor belt
  • notifying the user that laundry is complete
  • receiving a laundry retrieval command from the user
  • transporting the cartridge bin to the retrieval station via the conveyor belt

From the perspective of an end user (i.e., a person wishing to launder clothing or other textiles), the process may include one or more of the following steps:

• • loading items to be laundered into a cartridge bin at a loading kiosk
  • receiving laundry processing options
  • providing user selections based on the presented processing options
  • receiving a payment screen
  • providing payment information
  • [if payment processing is not successful] receiving an error message
  • [if payment processing is successful] receiving a confirmation message
  • receiving a notice that laundry is complete
  • sending a laundry retrieval command
  • receiving the laundry at a retrieval station
    Summary

Embodiments of the invention thus provide a system and method for laundering clothes or other textiles. Those skilled in the art can readily recognize that numerous variations and substitutions may be made in the invention, its use and its configuration to achieve substantially the same results as achieved by the embodiments described herein. Features disclosed in this specification could be combined in ways not expressly illustrated or discussed. Accordingly, there is no intention to limit the invention to the disclosed exemplary forms and applications. Many variations, modifications and alternative constructions fall within the scope and spirit of the disclosed invention.