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1. (WO2018185911) AIR CONDITIONING SYSTEM

Pub. No.:    WO/2018/185911    International Application No.:    PCT/JP2017/014373
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Fri Apr 07 01:59:59 CEST 2017
IPC: F25B 1/00
F24F 11/02
F25B 13/00
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: YOSHIZAWA, Musubu
義澤 結
Title: AIR CONDITIONING SYSTEM
Abstract:
An air conditioning system comprises: an outdoor unit that has a compressor and an outdoor heat exchanger; a plurality of indoor units that each have a throttling device and an indoor heat exchanger and that are connected to the outdoor unit via refrigerant piping; a plurality of indoor temperature sensors that measure the indoor temperature of spaces to be air conditioned that are each air conditioned by one of the plurality of indoor units; and a control device that controls the compressor and the throttling device. During cooling operation, the control device: finds a target evaporation temperature on the basis of the temperature difference between the set temperature of each of the plurality of indoor units and the indoor temperature of the spaces to be air conditioned by the respective indoor units; corrects the target evaporation temperature on the basis of the indoor temperature; finds the operation frequency of the compressor from the target evaporation temperature after correction; controls the compressor so as to run at this operation frequency; on the basis of the temperature difference between the set temperature of each of the plurality of indoor units and the indoor temperature of the spaces to be air conditioned by the respective indoor units and of the capacity ratio of the plurality of indoor units, finds the individual opening of the throttling device for each of the plurality of indoor units; corrects the opening of the throttling devices on the basis of the indoor temperature of the spaces to be air conditioned by the respective indoor units; and controls the throttling devices so that the individual opening of each throttling device assumes this corrected value.