Unfrozen heat exchanger for liquefied natural gas (LNG) automobile air conditioner

Abstract

The invention relates to heat exchanger equipment, and discloses an unfrozen heat exchanger for a liquefied natural gas (LNG) automobile air conditioner. The unfrozen heat exchanger comprises a multi-channel plate-fin LNG vaporizer and a plate-fin secondary refrigerant heat exchanger, wherein the multi-channel plate-fin LNG vaporizer consists of an LNG side inlet and outlet seal head, an overheated natural gas inlet and outlet seal head and a heat exchange plate bundle; the heat exchange plate bundle of the LNG vaporizer comprises an LNG side fin, an overheated natural gas side fin, clapboards, an end seal strip and two side plates; 5 heat exchange channels are formed among the clapboards; the plate-fin secondary refrigerant heat exchanger consists of a secondary refrigerant inlet and outlet seal head, a natural gas inlet and outlet seal head and a heat exchange plate bundle; the secondary refrigerant heat exchange plate bundle consists of an overheated natural gas side fin, a secondary refrigerant side fin, clapboards, an end seal strip and two side plates; and 17 heat exchange channels are formed among the clapboards. The unfrozen heat exchanger for the LNG automobile air conditioner can effectively solve the problem that a secondary refrigerant is frozen in the process of exchanging heat with LNG.

Description

Technical field: [0001] The invention relates to heat exchanger equipment, in particular to a non-freezing heat exchanger used for liquefied natural gas (LNG) automobile air conditioners. Background technique: [0002] With the rapid development of my country's liquefied natural gas (LNG) industry, the continuous progress of LNG liquefaction, receiving, storage, distribution and its application technology has drawn much attention to the new technology of LNG as a vehicle fuel. Cities have been put into operation on a large scale, and LNG-fueled heavy-duty tractors and engineering vehicles have also been quantitatively produced and delivered for operation. It is worth noting that since LNG is a liquid fuel stored at low temperature (atmospheric pressure storage temperature is -162°C), it is usually vaporized into a gaseous state and rewarmed to a temperature close to the environment before being used as a vehicle fuel to enter the engine for combustion. This process needs to ...

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Problems solved by technology

On the other hand, due to the comfort requirements of the air-conditioning system itself, directly transporting the cooling capacity of LNG at low temperature to the air-conditioned space will not only cause the freezing of water vapor and carbon dioxide in the air, but also the comfort cannot meet the requirements of the air-conditioning system

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