Air conditioning apparatus

摘要

An air conditioning apparatus 1 includes first start control and second start control as its start control. In the first start control, first outdoor heat exchangers 24a, 24b are controlled to function as evaporators and second outdoor heat exchangers 25a, 25b are controlled to function as condensers. Thus, even when the compressors 21a, 21b are driven on at a given rotation number, the discharge pressures thereof can be prevented from increasing, thereby being able to prevent the internal pressures of the compressors 21a, 21b from increasing. Also, after end of the first start control, the first outdoor heat exchangers 24a, 24b and second outdoor heat exchangers 25a, 25b are all controlled to function as evaporators, and the compressors 21a, 21b are driven on at a given rotation number. This can shorten the rising time of the heating capacity in the start of the normal heating operation.

主权项

1. An air conditioning apparatus comprising:
at least one outdoor unit including at least one compressor, at least two outdoor heat exchangers, flow passage switching devices connected to one end of each of the outdoor heat exchangers for switching the connection of the outdoor heat exchangers to the refrigerant discharge opening or refrigerant suction opening of the one or more compressors, outdoor expansion valves each connected to the other end of each of the outdoor heat exchangers for adjusting the refrigerant flow amount of the outdoor heat exchangers, and controller for executing the switching control of the flow passage switching devices and the valve opening rate control of the outdoor expansion valves; and, an indoor unit to be connected to the outdoor unit by at least two refrigerant pipes, wherein when a first given condition holds in the start operation of the outdoor unit, the controller executes first start control, in the first start control, the controller controls the flow passage switching devices corresponding to the one or more outdoor heat exchangers to allow it or them to function as an evaporator or evaporators, controls the flow passage switching devices corresponding to at least one of the other outdoor heat exchangers than one functioning as an evaporator to allow it or them to function as a condenser or condensers, and drives the one or more compressors at a predetermined rotation number.