| 摘要 |
PURPOSE:To sufficiently withstand the sudden pressure boosting of a refrigerand by excessive electromagnetic mechanical strength generating when an external short-circuit trouble is generated by a method wherein a cooling panel refrigerant entrance and exit part is constituted with a plurality of pipes. CONSTITUTION:The refrigerant lead-in and lead-out parts 14 and 18 of the cooling panel 6 provided protruding from the width of sheet winding are constituted with plurality of pipes 31. The pipes 31 are connected with each other by welding and the like so that they become same as the bending radius R of the cooling panel 6. As the entrance and the exit parts 14 and 18 constituted by the abovementioned pipes 31 have high degree of strength against internal pressure, the expanded refrigerant is dispersed and absorbed into each pipe 31 even when the pressure of the refrigerant in the cooling panel 6 is suddenly boosted by the excessive electromagnetic mechanical strength generated when an external short-circuit trouble occurs, and the swelling out of the protruded entrance and exit 14 and 18 of the panel 6 can be prevented.
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