An electric suction machine adopts oil-free self-lubricating double piston pump for suction source, by vacuum pump (dual piston pump), vacuum regulator, negative indicators, collecting container components, chassis and other components ; 2, with stepless regulator can be based on the characteristics of the patient's sputum viscosity can quickly suck out the phlegm and mucus, phlegm obstruction alleviate the suffering of patients, play a role in turning the corner; and 3, the machine has an overflow valve safety devices, safety and reliability; 4, the machine according to the type and degree of protection against electric shock is classified as Class Ⅰ equipment Part B applications, the operating mode for continuous operation, IPX0, non-AP or APG-general type equipment; 5, the products meet GB9706. 1, YY0505, YY0636.1 requirements. Specifications: 1, negative limits: ≥0.08MPa (600mmHg); 2, negative pressure adjustment range: 0.02 ~ 0.08MPa (150 ~ 600mmHg); 3, the pumping rate: pump outlet (the outlet) ≥20L / min terminal ≥15L / min; 4, Power: AC220V ± 22V, 50Hz ± 1Hz; 5, power consumption: ≤60VA; 6, noise: ≤60dB; 7, the collection container capacity: 1000mL; 8, the working environment: Temperature: + 5 ℃ ~ + 35 ℃, relative humidity: 25 ℃ not more than 80%, atmospheric pressure: 86KPa ~ 106KPa.