Color Doppler ultrasonic diagnostic instrument, due to a large number of high-tech equipment, high precision; Portable color super size space and weight requirements are very high, so the design requirements and internal hardware to achieve a higher degree of integration; The ultrasonic diagnostic instrument consists of probe, host, power supply, display, shell and peripherals. The host includes the front end part and the computer control part, the heat dissipation requirements and waterproof also have certain requirements.