Heat collector adopting all-glass return vacuum heat collecting tubes

The invention discloses a heat collector adopting all-glass return vacuum heat collecting tubes. The heat collector comprises a tube support, an inner and outer tube support frame, a frame, heat collecting tubes, union pipes and corrugated pipes; the frame comprises a first frame and a second frame; the inner and outer tube support frame comprises a first inner and outer tube support frame and a second inner and outer tube support frame; the tube support is positioned on the lowermost side; the heat collecting tubes are mounted in the tube support; the union pipes are positioned above the heat collecting tubes; the corrugated pipes are mounted on the union pipes; the union pipes are connected with the heat collecting tubes through joint assemblies; and the heat collecting tubes comprise outer glass tubes and inner glass tubes. The heat collector solves the technical difficulties perplexing the industry and difficult to solve by the market for many years, breaks through the technical bottlenecks of solar mediu