Automatic Control Method of Rail Vehicle Air Conditioning System

Abstract

The invention discloses an automatic control method for a rail vehicle air-conditioning system, which belongs to the technical field of rail vehicle air-conditioning. It is based on an air-conditioning unit with a cooling function. The air-conditioning unit has a ventilation mode and a five-stage refrigeration mode, and is characterized in that it includes the following steps : Step A, setting the target temperature Tic and collecting the return air temperature Ti in real time; Step B, realizing the switching between the ventilation mode, the cooling mode and the multi-stage cooling mode according to the detected return air temperature Ti and the set target temperature Tic, It includes two steps: the switching between the ventilation mode and the primary cooling mode, and the switching between the cooling modes of each level. The beneficial effects of the present invention are: when the personnel change and the external temperature change, through the automatic conversion and adjustment of different modes, the indoor temperature change rate can be made smaller, the indoor temperature control is more accurate, and the indoor comfort requirements can be satisfied to the greatest extent, bringing passengers more comfort. Come for a more comfortable experience.

Description

technical field The invention belongs to the technical field of rail vehicle air conditioning, and in particular relates to an automatic control method based on an air conditioning system with multi-stage refrigeration. Background technique The air-conditioning system is one of the essential systems of rail vehicles, which is used to raise fresh air into the compartment, exhaust exhaust gas and adjust the temperature of the air in the compartment. Among them, the air-conditioning unit in the air-conditioning system is the key equipment for adjusting the temperature in the compartment. By setting the temperature value in the compartment, the air conditioning unit will keep the temperature in the compartment at the set value through measures such as cooling, heating and ventilation according to the temperature inside and outside the compartment. At least the following technical problems exist in the prior art: 1. When the external temperature is high in summer, the refrige...

AI Technical Summary

Problems solved by technology

1. When the external temperature is high in summer, the refrigeration response is not timely, and the temperature in the compartment cannot be quickly reduced

2. The cooling and ventilation switching conditions are too broad, and the cooling will stop when the temperature in the cabin is high, making the body feel uncomfortable

3. Due to fluctuations in the external temperature, the temperature in the cabin fluctuates greatly, and cannot be continuously stabilized within the expected temperature range, which affects the actual temperature control effect

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