AIR-CONDITIONING APPARATUS

摘要

An air-conditioning apparatus includes a time constant calculation unit that estimates a response time constant at a time when an opening degree of an expansion device is changed on the basis of specifications of a compressor that forms a refrigeration cycle of the air-conditioning apparatus, specifications of a load side heat exchanger, and an operating state quantity of the air-conditioning apparatus, a control constant calculation means that calculates at least one of a control gain of the opening degree of the expansion device and a control interval on the basis of a calculation result of the time constant calculation means, and a control constant change means that changes a control constant.

主权项

1. An air-conditioning apparatus in which at least one load side unit including a load side heat exchanger is connected to a heat source side unit including a compressor, a heat source side heat exchanger, and an expansion device, and a refrigerant is circulated between the units to form a refrigeration cycle, the apparatus comprising:
a control constant calculation unit that calculates at least either of a control gain of the opening degree of the expansion device, the control gain being a control constant of the opening degree of the expansion device, and a control interval on the basis of an operating state quantity of the refrigeration cycle of the air-conditioning apparatus; and a control constant change unit that changes the control gain or the control interval on the basis of the calculation result of the control constant calculation unit, and an expansion device controller that changes the opening degree of the expansion device on the basis of the control constant.