Abstract: The invention provides a multi-Vt vertical power device and a method of making the same. Through patterning a contact mask, a contact structure array having a shared trench gate structure may be formed, and different traversal gaps between an edge of a contact portion of a second conductivity type and an edge of a trench may be formed in the contact structure array. As such, multi-Vt vertical states may be implemented for storing information. The present invention allows making a multi-Vt vertical power device having different Vt's to be capable to store information without additional process steps. Therefore, with respect to the present invention, the process is simple, cost is low, and application field is wide; number of Vt varies to store multi-bit digital information or analog information in the power device; the built-in multi-Vt power MOSFET and IGBT are adapted not only for the high power applications but also for information storage.

Abstract: The present disclosure relates to the technical field of heat pumps, in particular to an air source CO2 heat pump system for preventing an evaporator from frosting by using heat of a heat regenerator. The air source CO2 heat pump system mainly includes an air source heat pump system, a regenerative heat exchange tank and a cooling pump. Through the regenerative heat exchange tank, on the one hand, the temperature drop of regenerative heat of the system is further increased and throttling loss is reduced; on the other hand, the heat generated by the regenerative temperature drop is configured for heat storage used for defrosting, and configured for overheating temperature rise.

Abstract: The present disclosure relates to the technical field of heat pumps, in particular to an air source CO2 heat pump system for preventing an evaporator from frosting by using heat of a heat regenerator. The air source CO2 heat pump system mainly includes an air source heat pump system, a regenerative heat exchange tank and a cooling pump. Through the regenerative heat exchange tank, on the one hand, the temperature drop of regenerative heat of the system is further increased and throttling loss is reduced; on the other hand, the heat generated by the regenerative temperature drop is configured for heat storage used for defrosting, and configured for overheating temperature rise.