It is possible that the average person only knows that the ventilator is suitable for those who sleep and snoring, and those who have abnormal breathing due to the structure of the respiratory tract, but are not known to be suitable for patients with central nervous system diseases. Because this disease can cause cerebral arteriosclerosis, cerebral infarction, tumor in the brain, inflammation of the brain, inflammation of the gray matter of the brain, hemorrhage in the brain, traumatic brain injury, etc. These symptoms can cause difficulty in breathing, in order to allow the patient to breathe spontaneously. Therefore, the ventilator is used to avoid breathing difficulties and endanger life. Other patients with respiratory muscle weakness and myasthenia gravis should also use a ventilator. If people with these diseases want to go out, it is better to carry a travel ventilator. For people who often use a ventilator or a travel ventilator, it is easy to use because it is small, easy to carry, and does not take up much space. It can be used on trains, airplanes, ships and other vehicles. This is similar to a mobile phone, it can be charged, and it is charged by a charger. Charge the electricity before going out, you can use it. The positive air pressure ventilator is a kind of ventilator, which is mostly used for sleeping and snoring people. The ventilator has a humidifier, and the humidifier uses distilled or purified water because it does not contain harmful residues and does not breed bacteria.