Automobile tail gas heat recovery device allowing heat exchange amount to be controllable and working method of automobile tail gas heat recovery device

Abstract

The invention discloses an automobile tail gas heat recovery device allowing the heat exchange amount to be controllable and a working method of the automobile tail gas heat recovery device. According to the automobile tail gas heat recovery device, a gas intake pipe is divided into two channels, one channel is communicated with an exhaust channel silencer through an exhaust channel, the other channel is communicate with a heat exchange channel silencer through a heat exchange channel, and the exhaust ends of the two channels of the gas intake pipe converge to form an exhaust pipe; an expansion chamber of the heat exchange channel silencer serves as a gas chamber of a heat exchanger; a control valve is arranged at the separation position of the two channels of the gas intake pipe, and the flows of tail gas in the two channels of the gas intake pipe are controlled through the control valve. The automobile tail gas heat recovery device allowing the heat exchange amount to be controllable and the working method of the automobile tail gas heat recovery device have the advantages that the gas chamber of the heat exchanger is combined with the silencers, influences on exhaust back pressure are reduced, and the performance of an automobile engine is more stable; the dual-channel structure is adopted for the gas intake pipe, effective control over the heat exchange amount is achieved, and the automobile tail gas heat recovery device can be widely applied to more occasions; automobile tail gas waste heat is recovered, and the automobile tail gas heat recovery device has considerable economic value and environment protection significance.

Description

technical field [0001] The invention relates to an automobile exhaust heat recovery device, in particular to an automobile exhaust heat recovery device with controllable heat exchange and a working method thereof. Background technique [0002] With the rapid development of my country's economy, the number of cars is increasing day by day. The vast majority of cars use fuel as fuel, but in the process of fuel combustion, less than 30% of the energy is used by the car to do work, and the rest of the energy is wasted in the form of friction, heat dissipation, exhaust emissions, etc. Among these wasted energy Among them, the heat taken away by exhaust emissions occupies a large proportion. With the increasingly prominent environmental protection issues and the gradual adjustment of the national energy strategy, automobile energy saving and environmental protection technology has become a research and development hotspot in the field of automobile technology, and the waste heat ...

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Problems solved by technology

[0005] The object of the present invention is to solve the above problems, and propose a heat recovery device for heat transfer of automobile exhaust with controllable heat transfer and its working method. Under the premise of making full use of its internal space, the waste heat in the exhaust gas is transferred to the heat medium through the heat pipe, and the control valve at the air inlet of the device is used to control the heat exchange, which solves the heat exchange existing in ordinary exhaust gas heat exchange equipment. Problems such as low efficiency and uncontrollable heat transfer

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