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Low energy, low water consumption warewasher

  • US 4,872,466 A
  • Filed: 12/12/1988
  • Issued: 10/10/1989
  • Est. Priority Date: 02/26/1986
  • Status: Expired due to Term
First Claim
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1. In a warewasher for use in commercial establishments using a single batch of water for washing and rinsing a rack of ware and operating on a cycle time in the order of three minutes or less,a wash chamber,a door for opening and closing said chamber for introduction of a rack of soiled ware into the chamber and removal therefrom upon completion of washing and rinsing,a sump at the bottom of the chamber for holding water for use as a supply in washing the ware,at least one wash arm within said chamber and having a plurality of wash nozzles,recirculating pump means having an inlet connected to said sump and an outlet connected to said wash arm whereby during operation of said pump means said wash arm provides pressurized spraying of recirculated wash water from said sump onto the ware on the rack,a supply of fresh water under pressure located outside said chamber,rinse nozzles in said chamber located to spray rinse water over a rack of ware and being in fluid communication with said fresh water supply,valve means intermediate said water supply and said rinse nozzles for enabling rinsing of washed ware in response of opening of said valve means,drain means for draining a first portion of the wash water from said sump upon completion of washing a rack of ware,means for retaining a second portion of said wash water for use as wash water for a second rack of ware, andcontrol means for operating said recirculating pump means to recirculate wash water onto the ware for washing the ware and then operating said drain means to remove the first portion of wash water from the sump and to retain the second portion, thereafter opening the valve means to rinse ware with fresh water through said rinse nozzles, and then closing said valve means upon rinsing the ware to complete the cycle for a given rack of ware and to add the fresh rinse water to the retained portion of the wash water.

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