DEVICE FOR WASTE GAS HEAT RECUPERATION Russian patent published in 2016 - IPC F01N5/02 F01N13/08 

FIELD: engines.

SUBSTANCE: invention relates to a device for recuperation of exhaust gas heat, which performs heat exchange between exhaust gas released from internal combustion engine and heat exchange medium. Exhaust gas heat recuperation device, which performs heat exchange between exhaust gas released from internal combustion engine and heat exchange medium includes following: internal element forming a part of main channel which connects receiver inlet, into which waste gas is supplied, current on inlet side, with main transmitting outlet hole, through which obtained waste gas passes towards outlet, and forming main channel located on inlet side that is part of main channel located on side receiving inlet port; outer element enveloping inner element and forming together with internal element heat exchange channel; heat exchanger arranged in heat exchange channel so as to enclose inner element; switching unit which performs switching between first mode whereat exhaust gas is fed into main channel passes only through main channel for supply to main transmitting outlet hole, and second mode whereat exhaust gas is fed into main channel flows from main channel located on inlet side, via heat exchange channel in additional transmitting outlet, differing from main transmitting outlet hole. Heat exchange channel comprises first heat exchange channel formed between heat exchanger and internal element, and second heat exchange channel formed between heat exchanger and external element. Internal element and heat exchanger are arranged so that outlet hole to facilitate heat exchange is formed in end of first heat exchange channel on side of main transmitting outlet hole, and an additional transmitting outlet hole is formed in end of second heat exchange channel on side of main transmitting outlet hole, and in second mode waste gas flow from outlet hole to facilitate heat exchange in heat exchange channel. Exhaust gas fed in heat exchange channel flows in radial direction from inner side to outer side of heat exchanger, when passing through first heat exchange channel in inlet side to enter second heat exchange channel of first heat exchange channel, and then flows through second heat exchange channel towards outlet. Heat exchange occurs when exhaust gas flows in heat exchanger.

EFFECT: technical result is increased efficiency of heat exchange.

10 cl, 9 dwg