Waste heat recovery machine works (one heat) works direct thermal, room temperature water to pass gas, water heat exchanger, the air temperature dropped to room temperature, water exchange after re-entering the oil, water heat exchanger, the excess oil to maximize the absorption and utilization of capacity by adjusting the compressor run oil temperature control between 70 ~ 95 ℃, the system uses BESTDN microcomputer control, real-time monitoring and protection of the compressor running, 100% ensure empty normal operation of the press, the system is running, the pressure to pass the water pipe network itself, therefore the water can reach places without the pump running. Waste heat recovery unit uses direct thermal is greater than 1 ℃ cold water directly heated to between 55 ~ 90 ℃. Due to exchange with compressor oil and compressed air is water at room temperature, so the temperature is controlled oil and gas filling, so as to achieve the purpose of controlling the cooling system to maximize heat recovery and reduce energy consumption. Features an accurate match compressor operating conditions to achieve the best energy-saving effect. 2, the security control of air compressor cooling system, heat recovery maximization. 3, oil and gas dual recycling, energy efficiency, COP up to 88%. Energy conservation principle corrugated plate design with a high thermal conductivity of thin films as the target number of different corrugated plates are inverted flow path constituting the complex, three-dimensional rotation of the fluid flow within the flow path, strong turbulence can occur at a relatively low Reynolds number while turbulence should have self-cleaning and prevents dirt generation, cold and hot fluid whole countercurrent flow, logarithmic mean temperature difference correction system is small, the hot and cold fluid flow in the plate heat exchanger heat transfer surface is parallel to, no bypass, thus making the end plate heat exchanger temperature difference is small, water heat exchanger reaches 1 ℃, compact structure, small size, the heat loss to a minimum.