The Science of Everything Podcast Episode 150: How Home Appliances Work
Dec 31, 2024
Dive into the fascinating world of home appliances! Discover how refrigerators chill and sift through the mechanics behind rice cookers and microwaves. Uncover the science of washing machines and the tidy performance of vacuum cleaners. Learn about the design and plumbing innovations in modern flush toilets. The discussion reveals how engineering shapes daily conveniences and offers insights into the future of home technology. Plus, find out how video resources are enhancing the educational experience!
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How Refrigerators Work
- Refrigerators use a heat pump to transfer heat from inside to the outside.
- A refrigerant, R134A (tetrafluoroethane), circulates in a closed loop through an expansion valve, evaporator, compressor, and condenser.
How Rice Cookers Work
- Rice cookers heat water to boiling point; the temperature stops rising until all water evaporates.
- Once the bowl's temperature exceeds a threshold, a thermostat (often a bimetallic strip) cuts off power.
Dishwasher Operation
- Dishwashers clean by spraying hot, soapy water from rotating spray arms.
- The water, heated to about 75 degrees Celsius, effectively removes food and reduces bacteria.