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US 11,608,539 B2Granted
Air conditioner
AssigneeLG Electronics Inc.
InventorSeokpyo Hong
Life of this patent
Estimating the term…
Abstract
The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 7 kW to 11 kW, inclusive, and uses a refrigerant R32 as a refrigerant, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, and includes a suction pipe guiding the suction of the refrigerant into a compressor and having an outer diameter of 15.88 mm, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.
Claims21
An air conditioner comprising:
- an outdoor unit comprising a compressor, an outdoor heat exchanger, and an expansion valve, wherein a refrigerant is circulated by a refrigerant pipe configured to connect the compressor, the outdoor heat exchanger, and the expansion valve to each other;
- an indoor unit comprising an indoor heat exchanger;
- and
- a connection pipe configured to connect the outdoor unit to the indoor unit,
- wherein the air conditioner has refrigeration capacity of 7 kW to 11 kw, an R32 is used as the refrigerant,
- the refrigerant pipe is made of a ductile stainless steel material having an austenite matrix structure of 99% or more and a delta ferrite matrix structure of 1% or less on the basis of a grain area, and
- the refrigerant pipe comprises a suction pipe that guides suction of the refrigerant into the compressor and has an outer diameter of 12.70 mm,
- wherein an average grain diameter of the austenite matrix structure is 30 μm to 60 μm, and
- wherein the ductile stainless steel material comprises:
- percent by weight, C:
- 0 to 0.03%, Si:
- 0 to 1.7%, Mn:
- 1.5 to 3.5%, Cr:
- 15.0 to 18.0%, Ni:
- 7.0 to 9.0%, Cu:
- 1.0 to 4.0%, Mo:
- 0 to 0.03%, P:
- 0 to 0.04%, S:
- 0 to 0.04% and N:
- 0 to 0.03%.
17 more elements
An air conditioner comprising:
- an outdoor unit comprising a compressor, an outdoor heat exchanger, and an expansion valve, wherein a refrigerant is circulated by a refrigerant pipe configured to connect the compressor, the outdoor heat exchanger, and the expansion valve to each other;
- and
- an indoor unit comprising an indoor heat exchanger,
- wherein the outdoor unit and the indoor unit are connected to each other by a connection pipe,
- the air conditioner has refrigeration capacity of 7 kW to 11 kw,
- an R32 is used as the refrigerant,
- the refrigerant pipe is made of a ductile stainless steel material having an austenite matrix structure of 99% or more and a delta ferrite matrix structure of 1% or less on the basis of a grain area, and
- the refrigerant pipe comprises a suction pipe that guides suction of the refrigerant into the compressor and has an outer diameter of 15.88 mm,
- wherein an average grain diameter of the austenite matrix structure is 30 μm to 60 μm, and
- wherein the ductile stainless steel material comprises:
- percent by weight, C:
- 0 to 0.03%, Si:
- 0 to 1.7%, Mn:
- 1.5 to 3.5%, Cr:
- 15.0 to 18.0%, Ni:
- 7.0 to 9.0%, Cu:
- 1.0 to 4.0%, Mo:
- 0 to 0.03%, P:
- 0 to 0.04%, S:
- 0 to 0.04% and N:
- 0 to 0.03%.
18 more elements
An air conditioner comprising:
- an outdoor unit comprising a compressor, an outdoor heat exchanger, and an expansion valve, wherein a refrigerant is circulated by a refrigerant pipe configured to connect the compressor, the outdoor heat exchanger, and the expansion valve to each other;
- and
- an indoor unit comprising an indoor heat exchanger,
- wherein the outdoor unit and the indoor unit are connected to each other by a connection pipe,
- the air conditioner has refrigeration capacity of 7 kW to 11 kw,
- an R32 is used as the refrigerant,
- the refrigerant pipe is made of a ductile stainless steel material having an austenite matrix structure of 99% or more and a delta ferrite matrix structure of 1% or less on the basis of a grain area, and
- the refrigerant pipe comprises a suction pipe that guides suction of the refrigerant into the compressor and has an outer diameter of 19.05 mm,
- wherein an average grain diameter of the austenite matrix structure is 30 μm to 60 μm, and
- wherein the ductile stainless steel material comprises:
- percent by weight, C:
- 0 to 0.03%, Si:
- 0 to 1.7%, Mn:
- 1.5 to 3.5%, Cr:
- 15.0 to 18.0%, Ni:
- 7.0 to 9.0%, Cu:
- 1.0 to 4.0%, Mo:
- 0 to 0.03%, P:
- 0 to 0.04%, S:
- 0 to 0.04% and N:
- 0 to 0.03%.
18 more elements
Dependencies are inferred from the claim text.