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AssigneeDaikin Industries, Ltd.
InventorsShigeharu Taira, Junichirou Tanaka
Estimating the term…
A method for refrigerant and oil collecting operation capable of assuring the cleanliness of the inside of an existing communication pipe at a low cost and installing, at a low cost, a new air conditioner, comprising a compressor (1), a heat source side heat exchanger (3), a decompressing mechanism (4), and a user side heat exchanger (5), comprising the steps of performing a pipe heating operation in a heating operation mode and performing a refrigerant and oil collecting operation to collect refrigerant to a heat source side heat exchanger (3), namely, with the refrigerant heated to a temperature higher than that where contaminants such as refrigerator oil inside a refrigerant circuit is dissolved into the refrigerant, performing the refrigerant and oil collecting operation so as to assure the cleanliness of the inside of the existing communication pipes (7, 8).
A refrigerant and oil collection operating method for collecting a refrigerant in a refrigerant circuit, a refrigerant and oil collection operation is carried out in a state in which the refrigerant is raised in temperature to a temperature not lower than a temperature at which contaminants of a refrigerating machine oil and so on in the refrigerant circuit are dissolved in the refrigerant.
A refrigerant and oil collection operating method for collecting a refrigerant and oil in a refrigerant circuit, the method comprising the steps of:
A refrigerant and oil collection operating method comprising the steps of:
A refrigerant and oil collection control device for controlling an air conditioner having a compressor (1), a four-way changeover valve (2), an outdoor heat exchanger (3), a decompression mechanism (4), an indoor heat exchanger (5) and a liquid shutoff valve (6) sequentially through the steps of:
Dependencies are inferred from the claim text.