Thermosyphon device, cooling and heating device and method using the thermosyphone device, and plant cultivating method

Abstract

A thermosyphon device is provided for both cooling and warming (heating) enabling, by a simple structure, the easy installation operation, elimination of the need of adjusting operation, a reduction in manufacturing cost, and an increase in heat transportation efficiency. A large number of circumferentially-formed narrow concave grooves (G) are formed in the inner wall surface (121) of an outer tube (12) and in the outer wall surface (141) of an inner tube (14) facing the working space (S) of a double tube type thermosyphon disposed in the lateral direction. An operating liquid (Q) is evaporated at the evaporating portion of either of the inner wall surface (121) of the outer tube and the outer wall surface (141) of the inner tube and is condensed on the other wall surface while being raised in the circumferential direction of the wall surfaces (121, 141) by a capillary attraction via the narrow recessed grooves (G) to cool or heat the outer area of the outer tube. Depending on whether the surroundings of the outer tube are cooled or heated, a thermal source fluid of refrigerant or heat medium is supplied into the inner tube.

Description

TECHNICAL FIELD [0001] This invention relates to a thermosyphon. More particularly, this invention relates to a double tube type thermosyphon device that is used by passing an inner tube, through which a thermal source fluid flows, through an outer tube and that is multifunctional to be usable either for cooling or for heating, relates to a cooling and heating device using the thermosyphon device, relates to a cooling and heating method using the thermosyphon device, and relates to a plant cultivating method using the thermosyphon device. BACKGROUND ART [0002] Although a thermal converter, such as a heat pump, in which heat exchange efficiency falls in proportion to the smallness of a temperature difference between heat exchange fluids is known, a thermosyphon has recently come into practical use. The thermosyphon is capable of conveying a large amount of heat in a state of keeping the temperature difference therebetween small while utilizing an evaporation or condensation phase cha...

AI Technical Summary

Benefits of technology

"The present invention is a double tube type thermosyphon device that can cool and warm the outer area around the outer tube using a single device. The device has a simple structure, is easy to install, and can be adjusted for different uses. The device is designed to improve heat transfer efficiency and eliminate the need for adjusting operation. The invention also provides a cooling and heating method using the thermosyphon device and a plant cultivating method using the thermosyphon device. The technical effects of the invention include reducing manufacturing costs, simplifying installation, and increasing heat transportation efficiency."

Problems solved by technology

When switching between cooling and heating is performed after the device is installed, there has been a fear that major construction work must be performed for a change in the tube arrangement.

However, it is difficult to maintain a state in which these wicks are in close contact with the tube walls.

Thus, there has been a problem in the fact that production and adjustment in installation cannot be easily performed or in the fact that high cost is entailed because the tubes must be made of the same material as a container in connection with electrolytic corrosion.

Additionally, because of thermal resistance caused by the structure of the porous wick or by insufficient adhesion of the wick to the tube wall, an effect desired enough to be put to practical use can be hardly achieved especially when the area around the outer tube having a high temperature is cooled.

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