Illinois Tool Works Inc.

Mary E Paulus

Alexander R Anim-Mensah

Joseph F Sanders

Michael T Watson

Michael T James

Daryl Michael Osterloh

Nicholas T Weiss

Shawn D Waterman

Robert Petrick

Vincenzo Violi

Zachary Siefker

Prasanna Venkatesh Murlidharan

Bandr Mohsin Alsubaie

Philip Stone

Zaid Azmathullah Shaikh

Adam Puccetti

Cody Topp

Thomas J Ashworth

Tarik Said Mohammed Alkharusi

Marc D Lischerelli

A warewash machine includes a housing defining a ware inlet, a ware outlet and an internal chamber including a plurality of sequential spray zones including at least one wash zone and a rinse zone downstream of the wash zone in a ware conveyance direction. A vent path leads from the chamber leading to a vent outlet for connecting to a building ventilation system. A damper is provided for controlling a flow area at a location along the vent path. A controller is connected to control a position of the damper, the controller configured to adjust a position of the damper based upon input from at least a first temperature sensor, wherein the first temperature sensor is located at one of (i) the ware inlet, (ii) the ware outlet or (iii) along the vent path. Methods of operating a warewash machine are also provided.

Warewash machine energy conservation incorporating vent controls

A warewash machine includes a chamber for receiving wares, the chamber having at least one spray zone in which a liquid is recirculated from a tank to a spray tube assembly having a plurality of spray nozzles. The spray tube assembly includes a plurality of spray tubes, each including an input end and a distal end connected to a tube support, which has a fixed part and a cover movable between a closed and open positions. Each distal end has an opening that is covered in the closed position and uncovered, perhaps fully, in the open position. The tube support may include at least one latching assembly for holding the cover in the closed position. The cover and the access door may be cooperatively configured such that, when the cover is in the open position, the cover prevents the access door from moving to the closed operating position.

Warewasher and associated spray arm assembly

A warewash machine for washing wares includes a chamber for receiving wares, the chamber having an inlet side, an outlet side, multiple spray zones between the inlet side and the outlet side, and a conveyor arrangement for moving wares along a conveyance path through the multiple spray zones in a ware travel direction. A prescrapping zone is located toward the inlet side of the chamber, the prescrapping zone having a blow-off system comprising a plurality of prescrapping nozzles and a compressed air feed line for delivering compressed air to the prescrapping nozzles.

Warewasher with air assisted prescrapping

A batch-type warewash machine includes a chamber for receiving wares to be cleaned, the chamber having a chamber access opening and a single spray zone, with at least one spray system for spraying liquid onto wares in the single spray zone. A door is movable between a closed position covering the chamber access opening and an open position away from the chamber access opening to allow wares to be moved in and out of the chamber. A curtain structure is mounted on the machine, the curtain structure located behind the door when the door is in the closed position. The curtain structure remains in position and at least partially covers the chamber access opening when the door is in the open position so as to retain hot moist air within the chamber when the door is moved to the open position upon completion of a ware cleaning cycle.

Batch-type warewasher with energy retaining curtain

A warewash machine for washing wares includes a chamber for receiving wares, the chamber having at least one wash zone with an associated spray system for spraying liquid onto wares passing therethrough, wherein a downstream drying zone includes a blower for blowing air onto wares passing therethrough. The blower includes an ambient intake operatively connected to an ambient air flow path, a machine intake operatively connected to an internal machine air flow path and an exhaust intake operatively connected to a machine exhaust air flow path.

Warewasher machine drying system and method

A warewash machine for washing wares includes a chamber for receiving wares, the chamber having at least one spray zone. A spray system is provided in the spray zone for spraying liquid onto wares for cleaning. A tank captures sprayed liquid that falls within the spray zone. The tank includes a primary recirculation path for delivering liquid from the tank to the spray system, and a secondary recirculation path for delivering water out of the tank and back into the tank, without spraying within the spray zone, in order promote mixing within the tank.

Warewasher idling system and method

A warewash machine includes a chamber for receiving wares, the chamber having at least one wash zone. A refrigerant circuit includes multiple condensers including a condenser to deliver refrigerant heat to incoming water that is being delivered into the machine. A primary flow path for incoming water passes through a waste heat recovery unit and a secondary flow path for incoming water bypasses the waste heat recovery unit. A valve is provided for selectively controlling whether refrigerant flows along the primary flow path or the secondary flow path based upon a subcooled condition of refrigerant in the refrigerant circuit.

Warewasher with heat recovery system

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Sidney, OH, United States of America

Mary E Paulus