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US 10,852,027 B2Granted
Air conditioning system
AssigneeLG Electronics Inc.
InventorsChiwoo Song, Pilhyun Yoon
Life of this patent
Estimating the term…
Abstract
An air conditioning system including one or more supercooling heat exchangers, a supercooling expansion device, a temperature sensor, and a pressure sensor so as to measure and control a current supercooling degree value of a fluid coolant flowing between a fluid pipe and a plurality of indoor devices.
Claims11
An air conditioning system comprising:
- an outdoor unit including:
- a compressor;
- an outdoor heat exchanger connected to the compressor;
- and
- an outdoor supercooling heat exchanger provided at an outlet side of the outdoor heat exchanger to supercool refrigerant condensed in the outdoor heat exchanger;
- an indoor unit including:
- an indoor heat exchanger;
- and
- an indoor expansion device;
- a distributor that connects the outdoor unit with the indoor unit and distributes refrigerant to the indoor unit;
- and
- a connection pipe that connects the outdoor unit with the distributor and includes:
- a liquid pipe through which high-pressure liquid refrigerant flows;
- a low-pressure pipe through which a first gaseous refrigerant flows;
- and
- a high-pressure pipe through which a second gaseous refrigerant flows,
- wherein the distributor includes:
- a first liquid pipe connected to the liquid pipe;
- a header connected to the first liquid pipe;
- a first separation liquid pipe extending from the header and through which the high-pressure liquid refrigerant flows from the header;
- a supercooling heat exchanger connected to an outlet end of the first separation liquid pipe;
- a connection flow passage connecting the supercooling heat exchanger and the indoor unit;
- a second separation liquid pipe extending from the header and through which the high-pressure liquid refrigerant flows from the header;
- a supercooling expansion device connected to an end of the second separation liquid pipe to depressurize the high-pressure liquid refrigerant flowing through the second separation liquid pipe;
- a depressurization flow passage connecting the supercooling expansion device and the supercooling heat exchanger;
- a discharge flow passage connecting the supercooling heat exchanger and the low-pressure pipe, such that the refrigerant inside the supercooling heat exchanger is discharged to the low-pressure pipe;
- a temperature sensor disposed on a flow passage in which the high-pressure liquid refrigerant flows, to detect a temperature of the liquid refrigerant which is supercooled by passing through the supercooling heat exchanger;
- a pressure sensor disposed on the first liquid pipe in which the high-pressure liquid refrigerant flows, to detect a pressure of the liquid refrigerant introduced into the distributor through the first liquid pipe;
- and
- a controller configured to control the opening degree of the supercooling expansion device based on the temperature sensed by the temperature sensor and the pressure sensed by the pressure sensor,
- wherein a flow passage that connects the first separation liquid pipe and the connecting flow passage is defined as a main flow passage, and a flow passage that connects the second separation liquid pipe and the depressurization flow passage is defined as a branch flow passage, and
- wherein the refrigerant flowing along the main flow passage and the refrigerant flowing along the branch flow passage exchange heat with each other in the supercooling heat exchanger without mixing.
29 more elements
Dependencies are inferred from the claim text.