Method for assessing and guaranteeing a thermal hygiene effect

Abstract

A method for assessing and guaranteeing the thermal hygiene effect on items to be washed which are accommodated in a washing chamber of a single-chamber dishwasher or items to be cleaned which are accommodated in a cleaning chamber of a cleaning and disinfecting machine, with a temperature sensor being permanently assigned to the washing chamber or the cleaning chamber. The thermal hygiene effect produced by the temperature and action time acting on the items to be washed or the items to be cleaned is detected by means of the temperature sensor and a control system, and the heat equivalent values are calculated from this information.

Description

[0001]This nonprovisional application is a continuation in part of Ser. No. 11 / 719,746, which is the national stage of International Application No. PCT / EP2005 / 011661, which was filed on Oct. 31, 2005, and which claims priority to German Patent Application No. DE 102004056052.8, which was filed in Germany on Nov. 19, 2004, and which are all herein incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a method for assessing and guaranteeing the thermal hygiene effect, in particular of a dishwasher, on the items to be cleaned during the program run in the dishwasher.[0004]2. Description of the Background Art[0005]EP 1 371 319 B1 discloses a dishwasher having a washing container which can be divided into two parts. A dishwashing apparatus comprises an electrically operated valve which controls the entry of water from a mains, and also a softener unit for water, and also a washing container, a discharge line and a micr...

AI Technical Summary

Benefits of technology

The invention is about a dishwasher that monitors its hygiene and can correct any irregularities during a washing program. It uses an optical or acoustic signal to indicate the end of the program run, thereby avoiding a longer program. The dishwasher also improves the disinfection of bedpans and urine bottles by using steam and a temperature sensor to detect the temperature in the cleaning chamber. Overall, the invention saves resources, reduces power consumption, and improves the quality of cleaning and disinignment.

Problems solved by technology

However, laying lines in this way is problematic in the case of relatively thick sensor cables.

Since temperature-measurement control within the washing container can be carried out only when the appliance door is closed, parts of the door seal are so severely deformed by the clamped lines that leakages occur.

A separate measurement opening in the appliance door would have the disadvantage that, when the door is closed, the free cables move in an uncontrolled manner in the washing space and may even, reach the rotary region of the spray arms, which are associated with a rack, and block the spray arms.

One disadvantage of this method is the fact that these test methods can only be carried out on the customer's premises with an extremely great deal of outlay and are therefore not suitable for checking for correct operation of the washer in the case of small washers.

However, this method is not currently used for assessing the hygiene effect of commercial washers in Europe.

However, one disadvantage of this procedure is that unnecessarily long program run times sometimes result on account of the fixed prespecifications for washing programs whose temperature and other program parameters differ from these prespecifications, and this is extremely undesirable.

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