Cold and warm box system for LNG fuel vehicle

Abstract

The invention discloses a cold and warm box system for an LNG fuel vehicle. The cold and warm box system comprises a cold and warm box shell, a vehicle main gas supply flow path, an LNG cold energy recycling flow path, a refrigerant circulation flow channel, an engine cooling liquid flow path and a cold energy flow path for other purposes. According to the cold and warm box system for the LNG fuel vehicle, under the situation that the engine cooling liquid flow path is not affected, and the additional energy consumption is not needed, the cooling capacity in the LNG gasification process can be recycled to conduct refrigeration, and the quantity of heat of an engine cooling liquid circulation system can be utilized to conduct heating; meanwhile, cold and heat switching and optimal temperature control under two kinds of modes are achieved at the same time, and thus the requirements for refrigeration in summer and heating in summer of a driver are met.

Description

technical field [0001] The invention relates to the field of recovery and utilization of cold energy, and more specifically relates to a heating and cooling tank system for LNG fuel vehicles. Background technique [0002] Compared with compressed natural gas (Compressed Natural Gas), liquefied natural gas (LNG) has many excellent characteristics as a vehicle fuel, such as high energy density, low storage pressure, and no moisture and other condensable impurities. It is recognized as a more economical, safer and cleaner new energy source for vehicles. [0003] At present, liquefied natural gas vehicles have been widely used in operating vehicles such as heavy-duty trucks, city buses and long-distance transport buses. When LNG is used as a vehicle fuel, it needs to expand and gasify from a low-temperature liquid at -160°C to a normal-temperature gas. A large amount of cold energy is released during the gasification process. If this part of the cold energy can be recycled and ...

AI Technical Summary

Problems solved by technology

This application describes a device for recovering cold energy and air-conditioning refrigeration by using a heat exchanger connected in series with the engine evaporator. Although it meets the summer temperature and humidity adjustment requirements of key parts such as the cab to a certain extent, the disadvantage is that When the heat exchanger fails, the engine air supply system must be completely interrupted, affecting the driving of the vehicle

[0007] Patent Document 2 connects the first heat exchanger in series with the main air supply system of the original engine, which increases the failure rate of the air supply system. Once the damage occurs due to freezing, the normal air supply will not be possible, and the engine will not be able to run, which will affect the driving of the vehicle.

At the same time, the air conditioner stops running. In order to prevent the antifreeze A in the first heat exchanger from condensing, the electric pump will continue to run, which increases the failure rate and energy consumption.

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