Control method of subway air conditioner

Abstract

The invention discloses a control method of a subway air conditioner, which belongs to the technical field of railway vehicle air conditioning systems, and comprises the following steps: step a, the air conditioner judges whether a vehicle is on an uplink or a downlink and the current line position of the vehicle according to station information sent by a vehicle network; step b, when the vehicle is started from the current station, reading empirical data to obtain a time interval delta T required for entering the next power-off area from the current station; and step c, when delta T is smaller than 3 minutes, starting of the compressor is forbidden, and otherwise, corresponding actions are correspondingly executed according to the current working mode of the air conditioner. The position of the power-off area is predicted in advance through the speed and station information of the vehicle, the air conditioner is controlled to execute corresponding actions before entering the power-off area, the service life of the compressor is fully considered, the influence of the air conditioner system on the auxiliary inverter of the vehicle is also considered, the overload fault of the inverter is prevented, the reliability of the air conditioner system is ensured. A comfortable riding environment is provided for passengers to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle air-conditioning systems, and in particular relates to a control method for subway air-conditioning. Background technique [0002] Generally, urban rail trains use the contact rail (the third rail) to transmit electric energy to the vehicle to realize electric traction (750DC or 600VDC). In the infrastructure construction of train lines, in order to ensure the reliability and flexibility of traction power supply and reduce the scope of power failure accidents, the third rail power supply system is insulated and segmented on appropriate sections, that is, the third rail is not a continuous track, but There are multiple fractures. When the train collector shoe passes through the third rail break (hereinafter referred to as the power failure area), it will cause the loss of power in this carriage, and at the same time, the auxiliary inverter of the vehicle (converting high voltage DC to AC volt...

AI Technical Summary

Problems solved by technology

Since the starting current of the motor is 6~8 times of the current under the rated working condition, the instantaneous total current generated when each motor starts at the same time will be very large, which will cause the auxiliary inverter to be protected by overload and report a fault

This affects the normal operation of the air conditioning system and other AC load equipment

[0005] 2. Cause the compressor to start and stop frequently

When passing through the power outage area, the air conditioning system will lose power supply, which may cause the compressor to start and stop frequently

For refrigeration compressors, frequent start and stop will cause most of the refrigerated oil in the compressor to be pumped into the system pipeline and cannot return oil smoothly, which will easily cause the compressor to run out of oil and affect the service life. cause the compressor to burn out

[0006] 3. The cooling / heating temperature adjustment is out of control

When passing through the power outage area, the air conditioning system cannot start the compressor or electric heater due to the loss of power supply, that is, it cannot provide cooling or heating capacity for the compartment, resulting in the temporary loss of the compartment temperature adjustment function, which affects the comfort of passengers

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