Copper tubes can be welded after folding. No problem. It is a complete lie to say that the compressor dust is broken. Before disassembling the air conditioner, all copper valves at the air inlet and outlet should be closed, and all copper valves should be closed. What dust is left in the compressor? Those people who install air conditioners are just cheating you. In fact, people who have been exposed to air conditioners know the rules of this industry. If they can be cheated, they will be cheated, not that it is broken here and there. They'll sell it for themselves. If they say there is dust in their mouths, you can make them pay. The installation makes the air conditioner dusty. Why spend money on a compressor? Let's just say that. The transfer fee is not much, and you earn money by fooling you into changing parts.