Refrigerating system

Abstract

The invention discloses a refrigerating system which belongs to the technical field of refrigeration. The refrigerating system comprises a nitrogen tank which contains liquid nitrogen or solid nitrogen, a pressure reducing and temperature raising module connected with the nitrogen tank for reducing pressure or raising temperature of the liquid nitrogen or solid nitrogen exhausted from the nitrogen tank, and an evaporator connected with the pressure reducing and temperature raising module for evaporating the liquid nitrogen processed by the pressure reducing and temperature raising module. According to the refrigerating system provided by the invention, needed temperature range is realized by pressure reduction and temperature raise of high voltage and low temperature liquid nitrogen which is further evaporated by the evaporator to meet the comfortable temperature demand of a user. The system is simple in integral structure and can be used for refrigeration of an automobile air-conditioning system in summer environment. High pressure nitrogen is used as a cold source, and no power is needed to be obtained from an automobile engine for the air-conditioning refrigerating system, therefore, the integral dynamic property and fuel economy are effectively improved. The nitrogen is used as a refrigerant, so that pollution by conventional refrigerants such as R134a to environment is eliminated, and the green refrigerating system is effectively realized.

Description

technical field [0001] The invention relates to refrigeration technology, in particular to a refrigeration system using high-pressure nitrogen. Background technique [0002] The automotive air-conditioning refrigeration system is a device that cools the air in the cabin. It can provide a comfortable riding environment for the occupants in a high-temperature external environment, reduce the driver's fatigue intensity, and improve driving safety. [0003] The traditional automotive air conditioning system consists of a compressor, a condenser, a liquid storage drying bottle, an expansion valve, an evaporator, and a blower, which promote the circulation of the system through the compressor. [0004] Traditional air-conditioning and refrigeration systems use R134a as a refrigerant for refrigeration. R134a is the most widely used medium and low-temperature environmentally friendly refrigerant. Due to its good comprehensive performance, it has become a very effective and safe subs...

AI Technical Summary

Problems solved by technology

[0006] The traditional air conditioning system obtains energy from the car engine, which reduces the power of the engine to a certain extent, thereby reducing the power of the vehicle and increasing fuel consumption

[0007] Moreover, in the presence of Freon vapor, highly toxic phosgene will be produced when encountering an open flame. If the refrigerant leaks, it will not only make the car unable to achieve the proper cooling effect, but also cause serious damage to the environment and the human body. big hazard

At the same time, as an HFC refrigerant, R134a has a high GWP (Global Warming Potential, global warming potential value), which is easy to cause the greenhouse effect

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