Liquid nitrogen cryogenic refrigerator car

Abstract

The invention discloses a liquid nitrogen cryogenic refrigerator car which comprises a car head, a car frame and a compartment, a movable door is arranged at one side of the compartment, a contact switch is arranged at one side of the bottom of the compartment, a sealing plate is arranged in the compartment and divides the compartment into a refrigeration area and a goods storage area, and a control box is arranged on the side, located in the refrigeration area, of the sealing plate. The sealing plate is provided with a temperature sensor, an oxygen concentration sensor and a control unit at one side of the storage area, a liquid nitrogen storage tank is arranged in the refrigeration area, a liquid injection port is formed in the liquid nitrogen storage tank, a liquid outlet, a liquid outlet pipe and an electromagnetic valve are sequentially arranged at the top of the liquid nitrogen storage tank, and the liquid outlet pipe extends into the storage area and is in sealed connection with an atomization system; the atomization system is fixed to the top of the goods storage area, and a ventilation fan is arranged on the upper right portion of the goods storage area. The liquid nitrogen cryogenic refrigerator car can improve the cooling and refrigerating effects, the temperature of the compartment is more uniform, the internal temperature and oxygen content are detected in real time, the structure in the refrigerating area is stable, and the liquid nitrogen cryogenic refrigerator car is easy and convenient to use and suitable for application and popularization.

Description

technical field [0001] The invention relates to the technical field of refrigerated vehicles, in particular to a liquid nitrogen cryogenic refrigerated vehicle. Background technique [0002] The food cold chain refers to a systematic project in which perishable food is always kept in a specified low temperature environment in all links of production, storage, transportation, sales, and consumption to ensure food quality and reduce food loss. It was established with the advancement of science and technology and the development of refrigeration technology, based on food freezing technology and refrigeration technology as a means. [0003] Liquid nitrogen is a colorless, odorless, non-corrosive, low-viscosity transparent liquid with stable chemical properties. The latent heat of vaporization of liquid nitrogen is 5.56kJ / mol, which can absorb a large amount of heat when it is vaporized, and is an ideal refrigerant. With the development of refrigeration technology, liquid nitro...

AI Technical Summary

Problems solved by technology

The refrigerated vehicles using liquid nitrogen as the refrigerating medium have the advantages of simple structure, reliable operation, fast cooling speed, uniform temperature distribution in the compartment, and environmental protection, and are deeply loved by the public; The structure is single, and the uneven supply of liquid nitrogen leads to uneven temperature in the compartment; due to the inward flow of liquid nitrogen during transportation, the oxygen content in the compartment will be low, and when the compartment door is directly opened to load and unload goods, workers will inhale a large amount of oxygen. Nitrogen also has certain potential safety hazards

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