A control method for a subway air conditioner

Abstract

The invention discloses a control method for a subway air conditioner, which belongs to the technical field of rail vehicle air conditioning systems, and includes the following steps: step a, the air conditioner judges whether the vehicle is on an uplink or a downlink according to the site information sent by the vehicle network, and the current line of the vehicle Location; step b, when the vehicle starts from the current station, read the empirical data to obtain the time interval ΔT required to enter the next power outage area from the current station; step c, prohibit starting the compressor when ΔT is less than 3 minutes, otherwise according to the air conditioner Execute corresponding actions corresponding to the current working mode. The present invention predicts the location of the outage area in advance through the vehicle speed and site information, controls the air conditioner to perform corresponding actions before entering the outage area, fully considers the service life of the compressor, and takes into account the auxiliary inverter of the air conditioner itself on the vehicle The impact of the inverter prevents the overload failure of the inverter, ensures the reliability of the air-conditioning system, and provides passengers with a comfortable riding environment to the greatest 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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