At this time, there is far too much "prior art" to patent the simple look of a dryer interior.
What IS patent-able, if there's no prior art, or the features are not too generic, are functional improvements.
Such as, WP has been adding 4 fins instead of 3 to many of their dryers.
I haven't done any searches, but if WP can make a credible claim that 4 baffles has a specific unique improvement to dryer performance, THAT can be patented.
Preventing other makes from using 4 baffles for the next 20 years.
Everyone's got steam now, so that's not really patent-able.
But if there's a unique, improved "steam system" that can be patent-able. And someone copies it for infringement, then yeah, a lawsuit could ensue.
OR....a lot of times, companies (like my own) will settle out of court and allow certain "Design Swapping" to skirt lawsuits.
Basically, "you steal this pile of my stuff, so I can steal that pile of yours."
I can't fathom inlet/outlet location, screen visual design, lights, drum rib locations etc, being patent-able.