Abstract: In a refrigerator, the condensing system is regularly considered the heart of the whole machine. Whether the machine works properly  directly determines the lifespan and reliability of the refrigerator. In this part, it’s easy to be affected by the complex factors that affect the whole machine in the end.

Introduction | Why HVAC System Failures Often Begin with an Invisible Seam The answer is that HVAC systems usually take responsibility for transferring treated air to the living area; a small seam can lead to air leakage and cause energy loss throughout the system. What’s worse, the HVAC systems need