Start control method of train air conditioning units

Abstract

The invention relates to a start control method of train air conditioning units. An air conditioning system involved comprises air conditioning controllers which are in communication connection with a central processing unit by virtue of a communication network; a reference clock is set in the central processing unit; a timing clock and a clock signal significance bit are set in each air conditioning controller; the compartments of the train are serially numbered in a predetermined order; the control method comprises initializing correction synchronization, and enabling each air conditioning controller to turn on or off the corresponding air conditioning unit according to own timing clock. The start control method of the train air conditioning units specially aims at the train air conditioning system; on the basis of the existing equipment and extremely ingenious design, the technical problem that an existing air conditioning controller is subject to TCMS system communication conditions can be solved by only slightly modifying the control process; as a result, the air conditioning units of the various compartments can be controlled to be turned on or off sequentially, and therefore, great impact on the power grid due to the start and stop of the air conditioning units can be avoided thoroughly.

Description

technical field [0001] The invention relates to a start-up control method for train air-conditioning units, which is especially suitable for urban rail transit vehicles. Background technique [0002] As far as the applicant knows, the air-conditioning system of an urban rail transit vehicle is a non-important safety-related system. In order to reduce the cost of the vehicle, there is generally no internal communication network between the air-conditioning controllers (Heating, Ventilation and Air Conditioning Control Unit, HVAC). Therefore, the HVAC Data interaction cannot be performed between them, and they cannot directly know the start-stop status of the air-conditioning units they manage. When the air conditioning unit is started, the instantaneous current is relatively large, which causes a large voltage drop in a short time. If multiple air-conditioning units start at the same time, it will cause a large impact on the power grid. [0003] In order to avoid the large ...

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Problems solved by technology

[0004] In this way, during the train operation, once the communication between a certain HVAC and the TCMS system is interrupted, the HVAC cannot receive the authorized start pulse signal sent by the VCU, and at this time, the air-conditioning unit in the group where the HVAC is located cannot achieve cooling or heating Wait for normal working conditions

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