| 摘要 |
A heat exchanger <B>102</B> for use in a refrigeration unit (<B>101</B> Fig.1), comprising a metal plate <B>201</B> and a metal tube <B>202</B> for containing refrigerant (<B>203</B> Fig.2). The metal plate <B>201</B> has a first face <B>205</B> and a second face (<B>204</B> Fig.2), and the tube <B>202</B> is attached to said first face <B>205</B> of the metal plate by a plurality of spot welds <B>406.</B> The spot welds are laser spot welds and said welds extend through only a portion of the thickness of the plate <B>201</B>, such that the second face (<B>204</B> Fig.2) of the plate is undisturbed by the welds. The plate and tube may be formed from aluminum or aluminium alloy. Also claimed is a method of manufacturing a heat exchanger. |
