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US 10,852,042 B2Granted
Air conditioning system
AssigneeDaikin Industries, Ltd.
InventorsMasahiro Honda, Shigeki Kamitani
Life of this patent
Estimating the term…
Abstract
As a shut-off valve inspection process for checking operation of a liquid side shut-off valve and a gas side shut-off valve, an air conditioning system operates a compressor in a cooling cycle state, performs opening and closing operation of the liquid side shut-off valve and the gas side shut-off valve, and determines whether the liquid side shut-off valve and the gas side shut-off valve properly operate on the basis of a temperature value detected by a temperature sensor provided in an indoor unit.
Claims20
An air conditioning system comprising:
- a refrigerant circuit configured by connecting an outdoor unit having a compressor and an outdoor heat exchanger to an indoor unit having an indoor heat exchanger via a liquid refrigerant communication pipe and a gas refrigerant communication pipe, the indoor unit further having a liquid side shut-off valve closed when leakage of refrigerant is detected positioned on a liquid refrigerant pipe including the liquid refrigerant communication pipe and extending from a liquid side end of the outdoor unit to a liquid side end of the indoor heat exchanger, and a gas side shut-off valve closed when leakage of refrigerant is detected positioned on a gas refrigerant pipe including the gas refrigerant communication pipe and extending from a gas side end of the outdoor unit to a gas side end of the indoor heat exchanger, and
- a control processor configured to control the liquid side shut-off valve and the gas side shut-off valve,
- the control processor configured to perform a first shut-off valve inspection process for checking operation of the gas side shut-off valve by
- closing the gas side shut-off valve,
- operating the compressor in a state in which the outdoor heat exchanger functions as a radiator for the refrigerant, and
- determining whether the gas side shut-off valve is in a closed state individually based on first temperature value detected by a temperature sensor provided in the indoor unit, and
- the control processor configured to perform a second shut-off valve inspection process for checking operation of the liquid side shut-off valve by,
- closing the liquid side shut-off valve,
- operating the compressor in a state in which the outdoor heat exchanger functions as a radiator for the refrigerant, and
- determining whether the liquid side shut-off valve is in a closed state based on a second temperature value detected by the temperature sensor provided in the indoor unit.
7 more elements
Dependencies are inferred from the claim text.