Micro heat exchanger with vacuum heat insulation function

The invention provides a micro heat exchanger with a vacuum heat insulation function. The micro heat exchanger is composed of a micro heat exchanger body X, a heat fluid inlet connector A, a heat fluid outlet connector B, a cold fluid inlet connector C and a cold fluid outlet connector D. The micro heat exchanger body X is a solid which is formed by overlapping metal sheets with surface etched with different flow channels through vacuum hot pressing diffusion welding according to a certain sequence, wherein the metal sheets include a front cover plate 1, a front heat insulation hot plate 2, a cold fluid heat exchange plate 3, a heat fluid heat exchange plate 4, a rear heat insulation plate 5 and a rear cover plate 6. Vacuum heat insulation cavities are formed in the six faces of the welded solid, heat exchange in a heat conduction mode or a convection mode between the interior of the heat exchanger and the surrounding environment can be blocked, heat leakage is greatly reduced, and heat insulation can be achieved on the micro heat exchanger without the sticking of heat insulation cotton. When the micro heat exchanger serves as a micro evaporator, the condensation phenomenon caused by the too low surface temperature and the refrigeration capacity loss caused by the condensation phenomenon can also be avoided.