Hypobaric chamber is a device to test and exercise the ability of mountaineering athletes to resist hypoxia. Different completely closed cabins are in a state of low pressure and hypoxia with the aid of air extraction devices, and the simulated "high altitude" air pressure can be adjusted to several kilometers or more than 10,000 meters as needed. By staying in the low-pressure cabin, mountaineers can test their tolerance to hypoxia, thus measuring their climbing ability. In general, the hyperbaric chamber can also be used as a means to exercise hypoxia tolerance.
Vacuum pump device
Application number/patent number: 2005101kloc-0/9335.
A vacuumizing device is communicated with a space to be vacuumized and comprises a first pump, a second pump and a control circuit. The control circuit is electrically connected with the first pump and the second pump for selectively controlling the operations of the first pump and the second pump. When the control circuit controls the first pump to start independently, the first pump is used to pump the space to be pumped into a first vacuum environment; When the control circuit controls the first pump and the second pump to start at the same time, the first pump and the second pump are used to pump the space to be pumped into a second vacuum environment. The pressure of the second vacuum environment is less than that of the first vacuum environment.
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