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    • 5. 发明授权
    • Method for detecting brazing defects in plate-fin type heat exchangers
    • 检测板翅式热交换器钎焊缺陷的方法
    • US4412453A
    • 1983-11-01
    • US311599
    • 1981-10-15
    • Nobuyuki NagaiEiji TakahashiYoji MatsumotoHideaki Ohtsu
    • Nobuyuki NagaiEiji TakahashiYoji MatsumotoHideaki Ohtsu
    • F28F11/00G01N29/04G01N29/265
    • G01N29/265G01N2291/048G01N2291/102G01N2291/2632
    • A method for detecting brazing defects in a plate-fin type heat exchanger with a brazed core structure having a number of wavy fin members alternately with a number of parallelly spaced plate members, in which a pulsed sound in the frequency range of several tens KHz to several hundreds KHz is transmitted across the fin and plate members from a pulser located on one outermost plate member to a sensor located on the other outermost plate member, detecting the positions and sizes of brazing defects two-dimensionally on a plane on the basis of the level of sound received by the sensor. Three-dimensional detection of the position of the defect is also possible by combining therewith a radiographic inspection using a radiant ray source which is located on one lateral side of the core structure to irradiate a radiant ray in a direction substantially parallel with the plate members of the core structure.
    • 一种具有钎焊芯结构的板状翅片式热交换器中的钎焊缺陷的方法,所述钎焊芯结构具有多个平行间隔的板构件,所述钎焊芯结构具有多个平行间隔的板构件,所述钎焊芯结构具有多个波形翅片构件,其中脉冲声音在几十KHz至 在位于一个最外板构件上的位于一个最外板构件上的脉冲发生器上将数百KHz从翅片和板构件传递到位于另一最外板构件上的传感器,在二维基础上在平面上二维地检测钎焊缺陷的位置和尺寸 传感器接收的声音水平。 缺陷位置的三维检测也可以通过与使用位于核心结构的一个侧面上的辐射线源的射线照相检查相结合来辐射辐射线,该辐射光线基本上平行于板状构件的方向 的核心结构。