Abstract
An air conditioner includes a refrigerant circuit and a control device. The refrigerant circuit includes a compressor, a radiator, an expansion valve, and an evaporator, and performs a refrigeration cycle for executing a heating operation to heat an indoor space by compressing a refrigerant to a critical pressure or more. The control device controls the refrigerant circuit. The control device controls the expansion valve to adjust a refrigerant temperature at an outlet of the radiator, and controls a high pressure of the refrigerant circuit based on a temperature difference between an indoor temperature and a target indoor temperature.
Full Text
What is claimed is:
An air conditioner includes a refrigerant circuit and a control device. The refrigerant circuit includes a compressor, a radiator, an expansion valve, and an evaporator, and performs a refrigeration cycle for executing a heating operation to heat an indoor space by compressing a refrigerant to a critical pressure or more. The control device controls the refrigerant circuit. The control device controls the expansion valve to adjust a refrigerant temperature at an outlet of the radiator, and controls a high pressure of the refrigerant circuit based on a temperature difference between an indoor temperature and a target indoor temperature.
Timeline
Filed
03/19/2026Published
07/23/2026Granted
Not AvailableIPC Codes(3)
F25B 49/02:for compression type machines, plants or systems
F25B 9/00:Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
F25B 43/00:Arrangements for separating or purifying gases or liquids (in analysers or rectifiers F25B 33/00); Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat (takes precedence F25B 40/00)