The 2-cylinder engine adopts a two-cylinder V-shaped distribution, which makes the working force more symmetrical and reduces the impact of the test stress on the machine; The machine adopts a host direct connection method, with an energy transmission efficiency of up to 98%, which is higher than the traditional belt transmission efficiency of 93%; The exhaust separation structure is adopted (the intake port is on the piston, and the exhaust port is on the cylinder head) to avoid the exhaust temperature affecting the intake temperature and reduce the pressure Heat shrinkage balance temperature point; High-power open hot air fan, excellent heat dissipation performance, and safer use. The intake and exhaust gas adopt valve group design, which has better sealing, reduces compression heat, reduces leakage, and increases exhaust volume. Medical, natural gas filling stations, small oxygen and nitrogen generators, ozone instrument instrument gas, dry cleaning industry, communications industry, etc. Generators, new energy vehicles, laboratories