Ordinary household air conditioners generally use fluorinated refrigerants. Fluorinated refrigerants are toxic substances. Once the fluorinated refrigerants leak in the hyperbaric oxygen chamber, it is very dangerous. Therefore, to ensure safety, it should use ultra low noise water-cooled air conditioner in the oxygen chamber. The energy-efficient water-cooled air conditioner in the oxygen chamber uses a 24V DC low-voltage power supply, which can effectively eliminate the risk of high temperature and sparks caused by AC. At the same time, high performance water-cooled air conditioners can effectively cool down, giving users a comfortable experience.