well, that's one bit of the liquid, it's a continuous motion,īecause the pipes the liquid had to flow through are set at certain angles, if you park up too far off level the fridge performance suffers, modern fridges are a lot more tolerant than the older ones, 3 or 4 degrees off level now, but if you get it off level enough, the liquid can't make it through the mass of pipes, then you get problems with the liquid boiling and creating air locks, The gas side has it's flue welded to the main riser pipe, heat rises, so the liquid rises, at the top of the riser tube it turns 90 degrees, then starts it's downward travel, into and out of the cabinet, through small pipes and so on, eventually it reaches the reservoir, and starts journey again. And all 3 sources are heaters, the fridges are the absorption type, mix of ammonia and other stuff is circulated around the system of many convoluted pipes, in and out of large and small pipes to get the stuff into a gas and back to a liquid and so on, the heat just makes the liquid move, up a vertical riser tube with the electric heaters attached (100 - 150 watt heaters depending on the fridge size, hence why the 12volt one is wired to only run when the vehicles engine is running)

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