相变材料用于可拆卸护臂热防护服的实验研究

Working under high-temperature conditions is becoming increasingly common in summer; therefore, the working conditions of delivery workers, cleaners, security guards, and other personnel should be ensured, which is in line with China′s people-oriented development strategy. To overcome the shortcomings of traditional cooling clothing, such as a poor cooling effect, low battery life, high energy consumption, and high noise, thermal protective clothing with detachable arms for human operation in a high-temperature summer environment is designed using the characteristics of the phase change material Na₂SO₄·10H₂O, which absorbs heat at high temperatures. On this basis, a simulation experiment with water as the heating source and a real human test are conducted. The test results show that in the simulation test with hot water, under the working conditions of 30 ℃, 41 ℃, and 45 ℃, the temperatures of the four measuring points (the front chest, side abdomen, back, and abdomen) increase to the highest level in 60 min, and the average temperature of the four measuring points is finally reduced to approximately 26 ℃. The protective clothing exhibits good cooling performance at 30 ℃, and poor cooling performance at 45 ℃. In the real human test, the average temperature of the four measuring points in the protective clothing can finally decrease to approximately 26 ℃ within 3 h under the working conditions of 37. 1 ℃, 39 ℃, and 41 ℃. Under the high-temperature condition of 60 ℃, the average temperature of the four measuring points can finally decrease to approximately 31 ℃ within 3 h, and the average temperature of the inside and outside of the protective arm finally decrease to approximately 32 ℃, which are both lower than the critical temperature of the human body burning at 45 ℃. Therefore, the protective clothing exhibits a good cooling effect and can meet the thermal comfort requirements of outdoor workers in summer.