WATER-FREE WELDING METHOD FOR REFRIGERANT PIPING IN HEAT-EXCHANGER AND REFRIGERANT CIRCUIT FOR HEAT-EXCHANGER FORMED BY WATER-FREE WELDING

PROBLEM TO BE SOLVED: To reduce a production cost and prevent lowering of durability due to mixture of steam of cooling water in a refrigerant piping by a method wherein, in coupling of the refrigerant piping to refrigerant inlet and outlet, a work to weld in a state of a heat-exchanger being immers...

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Bibliographische Detailangaben
1. Verfasser:	YOSHIHARA HISASHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEATING LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To reduce a production cost and prevent lowering of durability due to mixture of steam of cooling water in a refrigerant piping by a method wherein, in coupling of the refrigerant piping to refrigerant inlet and outlet, a work to weld in a state of a heat-exchanger being immersed in cooling water is eliminated and an energy loss due to cooling is prevented. SOLUTION: In a method to weld refrigerant pipings 7 and 7 to refrigerant inlet and outlet 3 and 2 of a heat-exchanger 1, heat dissipation pipes 4 and 4 are located between the refrigerant inlet and outlet 3 and 2 and the refrigerant pipings 7 and 7. The heat dissipation pipe 4 and the refrigerant pipings 7 and 7 are coupled together by heating welding and the heat dissipation pipes 4 and 4 and the refrigerant inlet and outlet 3 and 2 are connected together by local welding.