A dishwasher is a mechanical Device used for cleaning dishes and eating utensils. Dishwashers can be found in restaurants and private homes. Unlike manual dishwashers, which relies largely on physical scrubbing to remove soiling, the mechanical dishwasher cleans by spraying hot( 55-65 degrees celsius or 130-150 degrees farenheit) water on the dishes now detergent- added products is used for cleaning purposes, then clean water to remove the detergent residue. Some dishwashers have multiple wash and rinse periods within the complete cycle. In some dishwashers a rinsing aid can be added to the rinse cycle. As there is no human contact during the process strong detergents may be used which would be to alkaline for habitual exposure to the skin. Many dishwashers have a heating element to achieve fast drying and sanitation for the dishes. In some models this element can also be used to heat cold water to the desired water temperature.
The history of dishwashers-The first reports of a mechanical dishwashing device are of an 1850 patent by joel houghton of a hand powered device modern dishwashers are descended from the 1886 invention of josephine cochrane, also hand powered, which she unveiled at the 1893 chicago world fair. She never washed dishes herself and only unvented it because her servants were chipping her fine china. By the 1970s dishwashers had become commonplace in domestic residences in the U.S
My Belief- I believe that dishwashers are one of the greatest creations ever they were created for those that don't have time to wahs dishes themselves or that just don't like washing dishes and its great for people that want to multi-task and do other things while the dishes are washing.
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