Transcritical CO2 air conditioner heat pump system and optimal control method thereof

Abstract

The invention discloses a transcritical CO2 air conditioner heat pump system and an optimal control method thereof. Aiming at how to work under different automobile driving environment working conditions, the performance of the air conditioning system can be quickly, accurately and adaptively adjusted. The method includes: firstly, a control method combining a multi-parameter extreme value searchcontrol algorithm and a self-learning neural network is provided for optimizing four optimization parameters, namely the system operation high pressure (Ph), the vehicle exterior heat exchanger air volume (Vgasc), the evaporation temperature (Te) and the effective superheat degree (Tsup); and then a specific control strategy of the four optimization parameters is further provided. According to themethod, the air conditioner of the new energy automobile can be rapidly self-adjusted all the time under various variable and complex driving environment working conditions, the requirement of passengers for the comfort degree of a compartment is met within the shortest time under the lowest energy consumption, and the energy crisis in the future is relieved.

Description

technical field [0001] The invention belongs to the field of transcritical carbon dioxide systems, and in particular relates to a new energy vehicle transcritical CO2 air conditioning system and an optimization control method thereof. Background technique [0002] New energy vehicles overcome the dependence on fossil fuels of fuel vehicles, with diversified energy utilization, quietness and environmental protection, representing the trend of future automobile development. New energy vehicles are different from fuel vehicles. Under low ambient temperature, there is no waste heat from the engine that can be used to heat the cabin air. Therefore, current pure new energy vehicles basically use PTC electric heating for heating in winter. However, the battery storage capacity of pure new energy vehicles is limited. , the use of electric heating heating is bound to affect the driving range of the car. The heating coefficient of the heat pump air conditioning system is above 1. Com...

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Problems solved by technology

[0004] At present, the existing transcritical carbon dioxide automotive air-conditioning system lacks an effective control logic in the control mode, and also lacks a corresponding high-efficiency and high-precision control system. In the state corresponding to the optimal performance, achieve the goal of optimal real-time operation

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