Pressurized solar collector, could assemble on roof and on flat roof, Harmony with the building perfectly. Heat pipe is a kind of cooper pipe with inner anti-freezing inorganic working medium, it works well even at an ambient temperature ?? (-)45º C and it possesses characteristics such as long lifespan ( more than 15 years), anti-insolation (250º C), anti-freezing (-45º C), low start-up temperature (??30º C), and a high thermal transmission coefficient (10000 times comparing with pure copper), it is a real special heat pipe suiting to be used in solar field.