| 摘要 |
PURPOSE: An automatic circulating method of a hot-water boiler is provided to economically heat the room by automatically heating the hot water and circulating the water without a particular boiler installation and a special circulating pump. CONSTITUTION: The cylinder(S) is composed of:an stroke chamber installing a piston(P) reciprocating left and right; a power chamber installing an actuator(A) expanded or contracted by the temperature change near the recirculating outlet so the piston road(r) of the actuator(A) as to be combined to the piston(P) having a valve(v'); an electric heater(h) having an automatic temperature controller(c) installed on the inner circumference of the cylinder(S); and a spring(s) installed on the front face of the piston(P) to promote the return of the piston(P).
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