A special joint and ground source heat pump system for ground source heat pump system

The utility model relates to a ground source heat pump technology field especially relates to a special joint and ground source heat pump system for ground source heat pump system. The application provides a being used for ground source heat pump system's special joint, including vertical setting and inside hollow joint body, connecting the body and locate the upper end that connects the main partincluding the joint main part that is equipped with first interface, second interface and third interface, first interface, the side that connects the main part is located to the second interface, and the lower extreme that connects the main part is located to the third interface, first kneck is equipped with rather than the end that can dismantle the connection, and the end be equipped with withthe line hole of the inner chamber intercommunication that connects the body, the line hole is used for wearing to establish measuring device's cable, second interface and ground pipe laying level set union coupling, the thir