Ejection refrigerating device, circulation system, air conditioning equipment and control method

The invention relates to an ejection refrigerating device, a circulation system, air conditioning equipment and a control method. The ejection refrigerating device comprises an ejector and a gas-liquid separator. An ejection outlet of the ejector is connected with the gas-liquid separator. A working opening and an ejection opening of the ejector are connected with an outlet of an outdoor heat exchanger and an outlet of an indoor heat exchanger respectively. A gas outlet pipe and a liquid outlet pipe of the gas-liquid separator are connected with a throttling valve in front of an inlet of a compressor and a throttling valve in front of an inlet of the indoor heat exchanger respectively. A first flow regulating unit and a second flow regulating unit are arranged in front of the working opening and the ejection opening of the ejector respectively. Compared with existing air conditioning equipment, the air conditioning equipment can improve refrigerating circulation efficiency on the aspect of throttling expansion work and on the aspect of compressor power consumption; besides, flow regulation can be carried out on working flow and ejection flow which are led to the ejector, and controllability and adaptability of ejection refrigerating are enhanced.