Contactor and air conditioning system

A contactor comprising:

• a main body provided with an opening;
• a first electrical terminal, arranged on the main body;
• a second electrical terminal, arranged on the main body;
• a contact support, at least partially arranged in the main body and arranged between the first electrical terminal and the second electrical terminal, the contact support comprising a movable contact member that is configured to be electrically connected to the first electrical terminal and the second electrical terminal when activated, such that a power received by the first electrical terminal from a power grid is at least partially transmitted to a load through the second electrical terminal;
• and
• a refrigerant blocking structure, arranged on a side of the main body toward the contact support, and the refrigerant blocking structure, the contact support, and the opening being arranged correspondingly, and the refrigerant blocking structure at least partially surrounding an outside of the contact support for blocking a flame generated by igniting of a refrigerant,
• wherein the refrigerant blocking structure includes:
• an extension member, arranged along a long side edge of the opening and protrudes on an inner side of the main body in a direction toward the contact support;
• and
• a function member, arranged along a short side edge of a rectangular structure of the opening and arranged on the inner side of the main body.