the arm patch that stops you getting cold: scientists create a wearable band that keeps your body at the perfect temperature - home battery pack
For those who fight for a thermostat in the office or at home, this could be a perfect answer.
Scientists have created an armband as a "personal thermostat" that keeps people who are always warm or cold at a constant temperature.
The patch inside worked for more than 8 hours, which can reduce the skin temperature of people by 10 degrees Celsius (50F).
Its inventors say it is a simpler solution than central heating or air conditioning, which must change the temperature of the entire building to keep several people comfortable.
This creates an argument when a person who is always cold turns on the thermostat and makes others sweat.
VIDEO Scroll down using the cuff work of thermoelectric alloy-
Materials that generate temperature difference by electricity-
Sandwiched between heat
Attach the elastic sheets to a small battery pack.
A person is tested at a background temperature of 22 to 36 C (72 to 97F)
, It stays at a constant 32C (90F).
Professor Chen, who led the study at the University of California, San Diego, said: whether you commute on a hot day or feel too cold in the office, this type of equipment can improve your personal thermal comfort.
If wearing this device can make you feel comfortable in a larger temperature range, then you don't need to turn off the thermostat in the summer or turn on the heating in the winter.
More than ten per cent of the energy consumed globally is used for heating and cooling buildings, making personal thermostats the Holy Grail.
But there are very few options for this, including built-in clothes
Fan or bulky vest with circulating coolant and water bag.
The researchers create patches by taking small columns of thermoelectric materials, welding them to thin copper strips of the electrodes, and placing them between two elastic rubber plates.
The current from the battery passes through the pillar, passing the heat from one piece to the other.
If the heat reaches the sheet closest to someone's skin, they warm up.
If it is transferred to the farthest place, the warmth will disappear from their skin and they will cool down.
Flexible, lightweight square
The shape is 5 cm (two inches)in diameter.
Researchers wrote in the journal Scientific progress that it is estimated that about 100 of people need to wear vests to cover parts of the body, such as the back and neck, which are at risk of overheating or cooling.
This will use about 26 watts of electricity on a hot day, which is less than half what a laptop needs.
However, manufacturing costs are still as high as hundreds
The researchers hope to reduce costs through further research.
On a male volunteer, the patch reached the target temperature within two minutes and stayed there.
It is expected to be commercialized in a few years.
Professor Chen said: "We have solved the basic problems and now we are solving the major engineering problems.
Electronics, hardware, and mobile applications for temperature control.