Compensation type shallow layer geothermal energy same-well conversion device of geothermal energy central air-conditioning

Abstract

The invention discloses a compensation type shallow layer geothermal energy same-well conversion device of a geothermal energy central air-conditioning. The device comprises a water source well and a well cover, an inner well pipe and an outer well pipe, a water outlet pipe, water return pipes and a submersible pump, wherein the outer well pipe coats the inner side of the water source well; the inner well pipe coats the center of the outer well pipe; at least two conical isolation support layers are arranged between the inner well pipe and the outer well pipe; the water outlet pipe carries with the submersible pump to be lifted below a water level in the inner well pipe; multiple water return pipes are respectively guided into areas among all the conical isolation support layers; and a compensation structure is arranged on the inner well pipe. The device can allow the lengths of the inner well pipe and the outer well pipe to be not totally the same, reduces the construction difficulty, has a wider allowance range of cutting errors and welding errors, and improves the working efficiency. The device overcomes the untight butting problem and the uneven bearing force of multiple isolation support layers in the blind areas.

Description

technical field [0001] The invention belongs to the field of geo(thermal) energy central air-conditioning and relates to a shallow-layer geo(thermal) energy utilization conversion device in the same well, in particular to a geo(thermal) energy central air-conditioning geo(thermal) energy utilization conversion device in the same well. Background technique [0002] Geothermal (thermal) energy central air-conditioning is a central air-conditioning system that uses groundwater with a constant temperature for many years as the medium for transmitting geothermal energy. Through the heat pump unit, the temperature of the water is raised or lowered to achieve the purpose of cooling and heating, and to provide cold and heat sources for buildings. Because of its high energy efficiency ratio, it saves 40-60% energy compared with other traditional forms of central air conditioners, and has a remarkable effect of energy saving and consumption reduction. It is gradually favored by governm...

AI Technical Summary

Problems solved by technology

However, since the well depth is usually hundreds of meters, the outer well pipe and the inner well pipe are welded independently. In this structure, the inner well pipe and the outer well pipe have no load-bearing relationship. The strong supporting force of the well cover will cause great technical problems. It is very difficult to install or maintain, and the wellhead sealing layer is also easy to reduce the service life due to the pressure of the well cover.

The implementation of this scheme still needs a lot of special designs to meet the standard, which is very difficult in practical application

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