Multi-air energy storage unit and its control method

The present invention discloses a multi-air energy storage unit, comprising: a plurality of refrigerant piping section outdoor unit, the indoor unit and the outdoor unit communication, an indoor unit; said outdoor unit comprises a gas-liquid separator, the compressor, the first a control valve, an outdoor heat exchanger, a second control valve, the energy storage device, and the liquid pipe shut-off valve to the manifold valve, the output of the compressor input and the gas-liquid separator, said shut-off valve trachea They are respectively connected by a refrigerant pipe between the indoor unit and the liquid pipe shut-off valve. The present invention provides a multi-air energy storage unit, may be implemented in a low power consumption accumulated cold or low load of the machine, at high load or peak period, release cold, to achieve the purpose of rapid cooling, the cooling operation achieved economics; Further according to the present invention may also be implemented at low power or low load machine, accumulate heat for defrosting the outdoor unit to provide heat to reduce the defrosting operation time and improve the overall heating capacity of the system.