Exhaust gas recirculation cooler
An exhaust gas recirculation, cooler technology, applied in indirect heat exchangers, heat exchanger types, machines/engines, etc., which can solve problems such as thermal deformation, deterioration of heat exchange rate, etc.
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[0042] Hereinafter, embodiments of the present invention will be described based on the drawings.
[0043] Figure 6 , Figure 7 Shows the first example of the implementation of the present invention, and Figure 1 ~ Figure 3 The same parts are marked with the same symbols.
[0044] In the EGR cooler of the first example, the number of tubes 3 arranged inside the outer cover 1 is reduced. On the upper side inside the outer cover 1, a predetermined set surrounded by the inner surface 1a, the plates 2, 2 and the tubes 3 of the outer cover 1 is formed In order to form a bypass flow path for the cooling water 9 in a given internal space 15, a bypass pipe 16 composed of one pipe is fixed along the axial direction of the housing 1 by welding, brazing, etc. The method is fixed on the inner side 1a of the outer cover 1.
[0045] The bypass piping 16 forms a bypass inlet 16a at a position opposite to the cooling water inlet 4 in the radial direction of the outer cover 1, and at the same ti...
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