A SYSTEM FOR HEATING THE SOIL IN HOTHOUSES USING THE SOLAR ENERGY

摘要

PURPOSE: An underground heating system for equipment gardening by using solar heat is provided to prevent the circumstance pollution with heating an electric heat medium by using the solar heat and by exchanging the electric heat medium and the heating water with heat and by using the heated water exchanged with heat and to make the optimum circumstance for raising the crops with the cheap price. CONSTITUTION: The underground heating system for equipment gardening by using solar heat includes many instruments. A heat collecting portion(10) heats the electric heat medium. A heat exchanger(30) exchanges the high temperature electric heat medium heated by the heat collecting portion(10) and the low temperature heated water stored in an axial row tank(40). The distributors(81, 82) distribute the high temperature heated water to the heating hoses(141, 142). An electric powered valve(50) controls the heated water temperature. A safety valve(101) sends out the electric heat medium to a supplying tank(60) and prevents rising of the pressure in the pipe. A pressure pump(116) supplies the electric heat medium to the pipe and prevents lowering of the pressure in the pipe. A safety valve(102) sends out the electric heat medium to a supplying tank(70) and prevents rise of the pressure in the pipe. The pressure pump(117) supplies the electric heat medium to the pipe and prevents lowering of the pressure in the pipe. A controller(20) controls the components.