Experimental study on intermittent operation of ground-…

Abstract: This paper describes the experimental results of the intermittent operation of ground source heat pump in winter. During the operation of ground-source heat pump, the ground temperature can be recovered through controllable intermittent process to make up for the lack of heat transfer in READ MORE

What is switching power supply? How to classify?

Switching power supply is an abbreviation of switching power supply, generally refers to an AC-DC converter whose input is AC voltage and output is DC voltage. The internal power switch of the switching power supply operates in the high-frequency switching state. The energy consumed by itself is ve READ MORE

New Development Status and Trends of CNC Tool New Techn…

First, the status quo and development trend of new products of CNC tool materials 1 Overview: In recent years, the results of basic research and new product development of CNC tool materials have been applied in high-speed (high-speed), hard (including heat-resistant, difficult-to-machin READ MORE