Liquid nitrogen cryogenic refrigerated truck

Abstract

The invention discloses a liquid nitrogen cryogenic refrigerated vehicle, which comprises a front, a vehicle frame and a compartment, a movable door is provided on one side of the compartment, a contact switch is provided on the bottom side of the compartment, a sealing plate is arranged inside the compartment, and the sealing plate The compartment is divided into a refrigeration area and a storage area. The sealing plate is equipped with a control box on one side of the refrigeration area. The sealing plate is equipped with a temperature sensor, an oxygen concentration sensor and a control unit on one side of the storage area. Liquid nitrogen storage tank. There is a liquid injection port on the liquid nitrogen storage tank. The top of the liquid nitrogen storage tank is provided with a liquid outlet, a liquid outlet pipe and a solenoid valve in sequence. The liquid outlet pipe extends into the storage area and is connected with the atomization system. Sealed connection, the atomization system is fixed on the top of the storage area, and a ventilation fan is installed on the upper right of the storage area; this liquid nitrogen cryogenic refrigerated truck can improve the cooling effect and make the temperature of the compartment more uniform, and the internal temperature, Oxygen content is detected in real time, and the structure in the refrigeration area is relatively stable, easy to use, and suitable for 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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