| 摘要 |
<p>The heater has a housing (3) in which an electrical heating element i.e. positive temperature coefficient heating element (5), is arranged. A heat exchanger is connected with the housing and is passed by air flow to be heated. The heat exchanger holds a coat layer (8) at an outer side of the exchanger, where the outer side is subjected to the air flow. The coat layer is made of silicone resin coating based on methyl silicone and/or phenyl silicone. The coat layer covers an etched metal surface, and the heat exchanger comprises a blown surface that is covered by the coat layer.</p> |
