Air conditioner

An air conditioner comprising:

• an outdoor heat exchanger configured to exchange heat between a refrigerant and outdoor air;
• an indoor heat exchanger configured to exchange heat between the refrigerant and indoor air;
• a first pipe configured to provide a channel for the refrigerant flowing out of the outdoor heat exchanger, the first pipe including a first inner diameter;
• a second pipe configured to provide a channel for the refrigerant flowing into the indoor heat exchanger;
• a coupling member configured to couple an end portion of the first pipe and an end portion of the second pipe;
• and
• a first insertion pipe inserted in the second pipe at the end portion of the second pipe, wherein the first insertion pipe comprises a first section having a first length and a second section having a second length, the first length shorter than the second length, and the first section and the second section being sequentially located along a flowing direction of the refrigerant,
• wherein the first section has a second inner diameter which is constant and smaller than the first inner diameter of the first pipe,
• wherein the second section has an inner diameter that gradually increases from the second inner diameter at a first end of the second section to a third inner diameter at a second end of the second section, the third inner diameter less than the first inner diameter, and
• wherein the first insertion pipe comprises:
• a first region forming an inner circumference thereof, and
• a second region corresponding to a remaining region except the first region, and
• the first region includes a strength that is greater than a strength of the second region.

AN air conditioner comprising:

• an outdoor heat exchanger configured to exchange heat between a refrigerant and outdoor air;
• an indoor heat exchanger configured to exchange heat between the refrigerant and indoor air;
• a first pipe configured to provide a channel for the refrigerant flowing out of the outdoor heat exchanger, the first pipe including a first inner diameter;
• a second pipe configured to provide a channel for the refrigerant flowing into the indoor heat exchanger;
• a coupling member configured to couple an end portion of the first pipe and an end portion of the second pipe;
• a first insertion pipe inserted in the second pipe at the end portion of the second pipe, wherein the first insertion pipe comprises a first section having a first length and a second section having a second length, the first length shorter than the second length, and the first section and the second section being sequentially located along a flowing direction of the refrigerant, wherein the first section has a second inner diameter which is constant and smaller than the first inner diameter of the first pipe, wherein the second section has an inner diameter that gradually increases from the second inner diameter at a first end of the second section to a third inner diameter at a second end of the second section, the third inner diameter less than the first inner diameter;
• and
• a second insertion pipe that is inserted in the first pipe at an end portion of the first pipe and in contact with an end portion of the first insertion pipe, the second insertion pipe including an inner diameter smaller than the first inner diameter and larger than the second inner diameter.