Solar constant-temperature instant hot water system based on slab-shaped flat pipe

The invention discloses a solar constant-temperature instant hot water system based on a slab-shaped flat pipe. The system comprises a solar heat collector provided with the slab-shaped flat pipe, a water tank, a header connected with the flat pipe, a coil pipe arranged in the water tank and connected with the header as well as a water supply system connected with the water tank, wherein when water temperatures in subsidiary water tanks do not reach set values of first temperature control devices, electric heating devices heat water in the subsidiary water tanks to set temperatures, hot water is supplied in a solar heating and electric heating combined manner, stable supply of constant-temperature domestic or industrial hot water can be guaranteed, the structure is practical and reliable, the solar heat collector is high in heat absorption and utilization rate, and intelligent temperature control is realized, so that heating is more efficient, and meanwhile, mounting and maintenance are convenient. 本发明公开了一种基于