Thermosyphon and method of manufacturing the same

Abstract

A thermosyphon formed in a simple structure, enabling an increase in heat transfer efficiency for transferring heat from the thermosyphon to the outside, and manufacturable at low cost and a method of manufacturing the thermosyphon. The double tube type thermosyphon is formed in a single and constant outside diameter size of cylindrical shape having an outer tube (10) and plug bodies (14). The outer tube (10) and the plug bodies (14) are formed in the constant outside diameter (K) size so as to come into contact simultaneously with one plane put on the upper outer surface thereof. Thus, for example, when the syphon is installed under a floor, the syphon is continuously fitted to an upper heat transfer plate in the longitudinal direction to reduce heat transfer loss and increase the heat transfer efficiency. Also, the yielding of material can be increased by reducing cut-out portions.

Description

technical field [0001] The present invention relates to a thermosiphon device and a manufacturing method thereof, in particular to a double-tube type thermosiphon device and a manufacturing method thereof, in which an inner pipe used for heat source fluid circulation is penetrated in an outer pipe serving as a main pipe. Background technique [0002] For heat exchange equipment such as heat pumps, which have the characteristic that the smaller the temperature difference between the heat exchange fluids, the lower the heat exchange efficiency, recently, thermosiphon devices that can transfer a large amount of heat with a small temperature difference by using condensation and evaporation phase changes are gradually being developed. Practical. Among them, the inner tube for the circulation of the heat source fluid is passed through the outer tube, for example, a structure in which cold and warm heat is transferred horizontally is excellent in practicality and attracts attention...

AI Technical Summary

Problems solved by technology

However, in this thermosiphon device, such as Figure 13 As shown, the wall thickness of the extruded and laterally bent flange 110A causes a step F to be generated between the two end side parts of a thermosyphon device and the outer pipe part in the middle thereof. When the upper indoor side is heated, etc., heat transfer loss occurs due to the gap between the uniform heat transfer plate 114 such as an aluminum plate laid on the upper surface, which becomes the main cause of the decrease in the heating or cooling efficiency of the indoor side.

In addition, because of the step F, there is a gap between the support member of the thermosiphon arranged under the floor, and there is a possibility that the floor may make floor noise when walking.

[0005] Moreover, for the conventional thermosiphon device shown in Patent Document 1, the outer tube part is molded, for example, by extrusion or drawing of aluminum, and the solid cylinder cover 106 that closes both ends of the outer tube 100 maintains a durable The strength of the extrusion force used in the extrusion process when the extrusion device performs the extrusion operation, such as Figure 12 , Figure 13 As shown, the thickness in the axial direction cannot be reduced, and in order to maintain airtightness in vacuum, the Figure 12 The flange 110 in the diameter D of the aluminum bar is cut and manufactured

Therefore, the qualified rate of the cover material is low, and the manufacturing cost of the thermosiphon itself is high.

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