The two copper pipes that connect the indoor and outdoor units of a household air conditioner?
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The flow direction of the two copper pipes that connect the indoor and outdoor units of a household air conditioner changes, right? During cooling, the thin tube flows from the outside to the inside, while the thick tube flows from the inside to the outside; the temperature of the thin tube is lower than that of the thick tube ； During heating, the thin tube flows from inside to outside, while the thick tube flows from outside to inside; is the temperature of the thin tube higher than that of the thick tube?
They’re all wrapped in insulation foam, so you can’t feel the temperature. I only know that it is the compressor that compresses Freon to enable heat exchange.
It is recommended to understand the heating principle first.