| 摘要 |
A heat exchanger (102) for use in a refrigeration unit (101), comprising a metal plate (201) and a metal tube (202) for containing refrigerant (203). The metal plate (201) has a first face (204) and a second face (205), and the tube (202) is attached to said first face (204) of the metal plate by a plurality of spot welds (405,406). The spot welds are laser spot welds and said welds extend through only a portion of the thickness of the plate (201), such that the second face (205) of the plate is undisturbed by the welds.
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