Effective heat dissipation method for epidemic prevention clothing

The COVID-19 has disrupted the peaceful lives of many families.

Especially in the hot summer, it’s a challenge for medical personnel to wear airtight anti-epidemic clothing and do their job.

 

We assume that the body cooling system is of great help to improve the working efficiency and reduce heat stroke.

To certify our assumption, we made a test as below:

1. Test time: 12:40-14:40 noon on June 22, 2020

2. Test conditions: outdoor air temperature is 33℃, average outdoor ground temperature is 50℃, without any shielding measures in the sun.

3. Test personnel: Both are wearing protective clothing, one is wearing a body cooling suit, and the other is not.

 

FLIR IMAGE:

 

Comparison of the FLIR of the tester wearing the cooling suit and not wearing the cooling suit. The comparison between the left one and the right one shows that the temperature of the tester wearing the cooling suit is 35.6℃, while the temperature of the tester without the cooling suit is 38.5℃, which has exceeded the normal temperature of the human body.

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 The video shows the FLIR of the two testers under direct sunlight. From the video, it can be seen that there is a clear blue low temperature area on the upper body of the tester wearing the cooling suit, while the other is not wearing the cooling suit.

 

When the test time lasted for 30 minutes, the person who was not wearing the cooling suit said that he was sweaty all over and could not continue, so he took off the protective clothing, and the tester wearing the cooling suit continued the test in the sun.

 

The another tester wearing the cooling suit continued to test in the sun. From the FLIR, it can be seen that the temperature of the upper limbs is around 30℃, which is in a relatively comfortable temperature range. Because the heat of the upper limbs is taken away by the cooling suit, the cold blood of the upper limbs is transported to the whole body so the tester does not feel the heat. After two hours, the ice in the backpack completely melted.

 

After two hours of direct sunlight testing, the result showed that the body surface temperature of the tester wearing the cooling suit was 3℃-7℃ lower than that of the tester not wearing the cooling suit. Half an hour after the test, the tester could not hold on without wearing the cooling suit, his body was soaked with sweat, and the test was suspended. The tester wearing the cooling suit can continue the test until two hours later, the ice in the backpack melts and the test ends.

From this test, it is concluded that the cooling clothing system has a good cooling effect for epidemic prevention personnel working in high-temperature environments or outdoors, and can greatly improve the physical comfort of epidemic prevention personnel.