Hot weather in both China and the U.S. this summer may not be good news for the climate, but ought to be good for Midea — the Chinese company that’s long been a consumer electronics giant at home, and has become increasingly successful in the American market.  From its home base in China, Midea -- a company with more than $50 billion in annual revenue and 166,000 employees -- produces a range of home appliances, including air conditioners, refrigerators and microwave ovens, as well a