Leakage restriction device for refrigeration cycle

A leakage restriction device for a refrigeration cycle through which a refrigerant flows, the refrigeration cycle having a pipe connection portion at which refrigerant pipes are connected, the pipe connection portion being disposed in air, the leakage restriction device comprising:

• a first leakage restriction member disposed on an air side in the pipe connection portion for restricting the refrigerant from leaking into the air;
• and
• a covering member which covers a surface of the first leakage restriction member;
• wherein:
• the first leakage restriction member has a gas permeability lower than that of the second leakage restriction member;
• the first leakage restriction member has a blistering-resistance which is inferior to that of the second leakage restriction member;
• the first leakage restriction member is made of a first material;
• and
• the covering member is made of a third material having a gas permeability lower than that of the first material.

A leakage restriction device for a refrigeration cycle through which a refrigerant flows, the refrigeration cycle having a pipe connection portion at which refrigerant pipes are connected, the pipe connection portion being disposed in air, the leakage restriction device comprising:

• a first leakage restriction member disposed on an air side in the pipe connection portion for restricting the refrigerant from leaking into the air;
• and
• an embedded member embedded in the first leakage restriction member and made of a fourth material;
• wherein:
• the first leakage restriction member has a gas permeability lower than that of the second leakage restriction member;
• the first leakage restriction member has a blistering-resistance which is inferior to that of the second leakage restriction member;
• the first leakage restriction member is made of a first material;
• and
• the fourth material has a gas permeability lower than that of the first material.

A refrigeration cycle through which a refrigerant flows, the refrigeration cycle comprising:

• a pipe connector disposed in an air;
• a plurality of pipes through which the refrigerant flows, the pipes being connected at the pipe connector;
• a first leakage restriction member disposed on an air side in the pipe connector for restricting the refrigerant from leaking into the air;
• a second leakage restriction member disposed on a refrigerant side in the pipe connector for restricting the refrigerant from leaking into the air;
• and
• a covering member which covers a surface of the first leakage restriction member;
• wherein:
• the first leakage restriction member has a gas permeability lower than that of the second leakage restriction member;
• the first leakage restriction member has a blistering-resistance which is inferior to that of the second leakage restriction member;
• the first leakage restriction member is made of a first material;
• and
• the covering member is made of a third material having a gas permeability lower than that of the first material.

A refrigeration cycle through which a refrigerant flows, the refrigeration cycle comprising:

• a pipe connector disposed in an air;
• a plurality of pipes through which the refrigerant flows, the pipes being connected at the pipe connector;
• a first leakage restriction member disposed on an air side in the pipe connector for restricting the refrigerant from leaking into the air;
• a second leakage restriction member disposed on a refrigerant side in the pipe connector for restricting the refrigerant from leaking into the air;
• wherein:
• the first leakage restriction member has a gas permeability lower than that of the second leakage restriction member;
• the first leakage restriction member has a blistering-resistance which is inferior to that of the second leakage restriction member;
• and
• a surface of the first leakage restriction member is deformed to have a gas permeability lower than that of the first leakage restriction member.