Multi-runner medium-deep rock soil heat exchange device

The utility model discloses a multi-runner medium-deep rock-soil heat exchange device, belongs to the technical field of ground rock heat, and aims to solve the problem that thermal short circuit is easy to occur between an inner sleeve and an outer sleeve of a heat dissipation section at the upper part of a coaxial sleeve heat exchange device. The device comprises an inner sleeve arranged in an outer sleeve; a set of arc-shaped inner pipe flow channel partition plates are arranged on the upper portion in the inner sleeve, a closed inner pipe air cavity is formed between the inner pipe flow channel partition plates and the inner sleeve, and an inner pipe partition flow channel is formed in the space, outside the inner pipe air cavity, of the inner sleeve. Two groups of arc-shaped outer pipe flow channel partition plates are arranged between the upper parts of the inner sleeve and the outer sleeve, a closed outer pipe air cavity is formed among the grouped outer pipe flow channel partition plates, the outer wa