Abstract: A heat exchanging device includes a receptacle having a chamber for receiving a fluid medium, a housing received within the receptacle and having an outer peripheral wall arranged to allow the fluid medium to flow into the housing via the upper portion of the outer peripheral wall, and having an inner peripheral wall having a lower portion directed toward the lower portion of the receptacle. A circulating device may circulate the fluid medium to flow from the upper portion of the housing and then toward the lower portion of the receptacle. A coil is arranged to have a fluid material to flow in a direction opposite to that of the fluid medium, to allow the fluid medium to transmit and to release heat to the fluid material.

Abstract: A heat exchanging device includes a receptacle having a chamber for receiving a fluid medium, a housing received within the receptacle and having an outer peripheral wall arranged to allow the fluid medium to flow into the housing via the upper portion of the outer peripheral wall, and having an inner peripheral wall having a lower portion directed toward the lower portion of the receptacle. A circulating device may circulate the fluid medium to flow from the upper portion of the housing and then toward the lower portion of the receptacle. A coil is arranged to have a fluid material to flow in a direction opposite to that of the fluid medium, to allow the fluid medium to transmit and to release heat to the fluid material.

Abstract: A heat exchanging device includes a housing received in a container for allowing the fluid in the container to flow through the housing. A tube is extended through the housing. A driving device may pump the fluid in the container to flow through the housing and to have an increased heat exchange effect, within the housing, with the fluid in the tube, and may be driven by another driving device which may be actuated by the fluid flowing through the tube. A heater may be used to heat the fluid in the container and in the housing.

Abstract: A solar roofing assembly includes a number of solar collecting units disposed between each other so as to form a number of gaps. A number of sealing strips are engaged with the gaps for sealing the gaps and for allowing the units to form a roof of a building. The units each includes four corner portions each having a corner notch and a stud extended in the corner notch for allowing the units to be disposed adjacent to each other. A number of caps may enclose the corner notches for allowing the units to form the roof.

Abstract: A solar energy collecting system includes a water tank and a solar collector and a pump for pumping water from the water tank to the solar collector. A sensor is arranged close to the solar collector. A CPU is connected to the pump and the temperature sensor in order to circulate the water according to the water temperature at the inlet of the solar collector. The water can be circulated in a fast speed when at noon. The water may be heated with a lengthened heating time and may be heated with a smaller temperature difference so as to effectively collect solar energy.

Abstract: A three-way tubing includes an outlet, an inlet and an opening communicated with one another, a valve is pivotally supported in the tubing and includes a board and a panel perpendicular with each other, when water flows from the opening to the outlet, a force may act on the panel such that the board is forced to close the inlet and such that water is prevented from flowing through the inlet, when water flows through the inlet, the water forces the board away from the inlet when the outlet is enclosed such that the water may flow through the opening.

Abstract: A container for a solar heater includes two barrels received in a housing for containing liquid and a sealing material filled between the barrels and the housing so as to seal the barrel. A pair of couplers are oppositely engaged in the upper portion of the barrel, and a connector is connected between the barrels. The barrels are coupled together by clamping rings.

Abstract: A solar collector including a plate disposed in a bottom portion of a housing, one or more tubes disposed above the plate for accommodating water, and one or more reflecting surfaces formed in the upper portion of the plate for reflecting lights in order to heat the water contained in the tubes.

Abstract: A solar heater includes a pair of tracks disposed longitudinally on the side portions, a container including a pair of wheels rotatably engaged in the tracks, a number of orifices formed in each of the tracks, and a pair of supports having one end engageable with either of the orifices so as to support the solar heater and the container in a slope.