Aluminum alloy heat exchanger and method for manufacturing refrigerant passage pipe used for the same
    8.
    发明专利
    Aluminum alloy heat exchanger and method for manufacturing refrigerant passage pipe used for the same 有权
    铝合金热交换器及其制造用于其的制冷剂通气管的方法

    公开(公告)号:JP2011007382A

    公开(公告)日:2011-01-13

    申请号:JP2009149518

    申请日:2009-06-24

    Abstract: PROBLEM TO BE SOLVED: To provide an aluminum alloy heat exchanger with high corrosion resistance, achieving further weight and cost reduction, especially suitable as a heat exchanger for an automobile by using a refrigerant passage pipe made of an aluminum alloy excellent in strength after brazing and corrosion resistance, having improved extrudability.SOLUTION: The aluminum alloy heat exchanger is heated and brazed in an atmosphere furnace after applying a coating material obtained by adding a binder to a mixture made of compound-based flux powder containing Si powder and Zn to the surface of the refrigerant passage pipe, and attaching a bare fin made of an Al-Mn-Zn-based alloy. The refrigerant passage pipe is formed of an aluminum alloy extruded material containing 0.5-1.7% of Mn, Cu limited below 0.10%, Si limited below 0.10%, and the balance Al with inevitable impurities. In the mixture, the mixing ratio of the compound-based flux powder containing the Si powder and Zn falls within the range of 10:90-40:60. The binder is added so that it amounts to 5-40% of the entire coating material, and applied to the outer surface of the refrigerant passage pipe so that the total amount of the compound-based flux powder containing the Si powder and Zn becomes 5-30g/m. The potential of the surface of the refrigerant passage pipe after heating for brazing is baser than that of a region deeper than the diffusion depth of the Si and Zn, and the potential difference is 20-200 mV. Moreover, the potential of the fin is baser than that of the deep part of the refrigerant passage pipe.

    Abstract translation: 要解决的问题:为了提供具有高耐腐蚀性的铝合金热交换器,通过使用由钎焊后的强度优异的铝合金制成的制冷剂通道管,特别适合作为汽车的热交换器而进一步重量和成本降低,以及 耐腐蚀性,具有改善的挤出性。解决方案:将铝合金热交换器在通过将由粘合剂添加到由含有Si粉末和Zn的化合物助焊剂粉末制成的混合物的涂料上涂覆到表面上之后,在气氛炉中加热并钎焊 的制冷剂通道管,并且附着由Al-Mn-Zn基合金制成的裸露的翅片。 制冷剂通过管由含有0.5-1.7%的Mn,限制在0.10%以下的Si,限制在0.10%以下的Si和不可避免的杂质构成的铝合金挤压材料形成。 在混合物中,含有Si粉末和Zn的化合物基焊剂粉末的混合比在10:90-40:60的范围内。 添加粘合剂使其占整个涂料的5-40%,并施加到制冷剂通道管的外表面,使得含有Si粉末和Zn的化合物基焊剂粉末的总量变为5 -30g /米。 加热钎焊后的制冷剂通路管的表面的电位比比Si和Zn的扩散深度更深的区域的电势,电位差为20〜200mV。 此外,翅片的潜力比制冷剂通道管的深部的潜力大。

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