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The working principle and washing process of the dishwasher

by nadlia
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LSome people say that washing dishes in a dishwasher is the same as washing clothes in a washing machine. You put the dishes in the dishwasher and stir them. I really want to ask these people, have you considered the feeling of the bowl when you say this? If the principle of the dishwasher is true, whose bowl can stand it.

| The washing principle of mainstream dishwashers

Spray type: The tableware is washed by the high-temperature and high-pressure water jetted from the spray arm, and the detergent can effectively decompose the oil stains and residues on the surface of the tableware. Make the oil stains disintegrate and fall off quickly, so that the surface of the tableware is cleaned. At the same time, due to the use of high-temperature washing, it can be washed to kill most of the bacteria.

Ultrasonic type: When the ultrasonic wave passes through the liquid medium, it will press the liquid medium to vibrate at a very high frequency. When the sound intensity reaches a certain value, tiny cavitation bubbles will grow rapidly in the liquid and close instantly, resulting in strong micro-explosions and shock waves. The stains on the surface of the tableware are destroyed and disintegrated, and they fall off completely. Up to hundreds of millions of cavitation bubbles act at the same time every second, which has a very good cleaning effect. Ultrasonic dishwashers can wash a lot of tableware, and at the same time consume a lot of water. They are generally aimed at commercial markets such as hotels and restaurants that clean a large number of tableware.

dishwasher principle process

dishwasher principle process

| The washing process of the spray dishwasher

The water used in the dishwasher will first go through a water softener to soften the water quality, remove calcium, magnesium plasma, etc. in the water, and avoid scale formation. Then heat through the heating tube. Different dishwashers, or even different washing procedures of the same dishwasher, are different, but they generally go through the following process.

Pre-washing link: Advanced water is used once, and the tableware is rinsed in a high-pressure cycle through the rotating spray arm to rinse off the residue on the tableware and then drain the dirty water.

Main wash link: enter the second water, heat up (50ºC ~ 70°C), open the detergent compartment at the same time to add detergent to the water, then perform high-pressure cycle washing on the tableware, and then drain the dirty water.

Rinsing link: enter the water for the third time, and use cold water to rinse the tableware.

Drying stage: Add rinse aid to the water, heat the water to 70°C, drain the water after rinsing, and use the residual heat to dry the dishes. Some dishwashers also have heating elements for faster drying. This process has the function of disinfection and sterilization to a certain extent.

The above process is just a general process. For example, compared with energy-saving washing, strong washing will increase the number of washing times. water.

dishwasher principle process

dishwasher principle process

| other

Here is a video (recorded by a Japanese netizen) about the inside of the dishwasher when it is washing dishes, but this kind of dishwasher is not a common domestic spray arm dishwasher, so it is only for reference to a certain extent.

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