A by-pass capillary tube was added on the discharge pipe behind the four-way valve and a tube was added in an accumulator in a heat pump system to solve the problem.
在热泵系统四通换向阀后的排气管上加旁通毛细管和在气液分离器中加过冷管。
2
Thick wall pipes are the core component of so called "fourpipe" system for thermal power. It is important to apply circumferential guided wave technique to nondestructive testing of thick wall pipes.
厚壁管道是火电机组四大管道系统的核心部件,将超声导波技术应用于厚壁管道的无损检测显得十分重要。
3
Describes the features and equipment of the air conditioning system, focusing on the lithium bromide units and operating mode of four-pipe water system, and summarizes the existing problems.