Geothermal energy central air-conditioning connection type shallow geothermal energy conversion device and method in the same well

Abstract

The invention discloses a connection type shallow layer geothermal energy same-well conversion device and a method 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, a water return pipe and a submersible pump, wherein the outer well pipe and the inner well pipe are formed by welding multiple well pipe sections; outer pipe sealing joints are connected between the adjacent outer well pipe sections; rubber ring taper tables are arranged in corresponding positions of the inner walls of the outer pipe sealing joints; rubber taper pieces are respectively arranged in corresponding positions on the outer wall of the inner well pipe; the rubber taper pieces and the conical surfaces of the rubber ring taper tables can be matched and supported; and the device can guarantee the outer pipe sealing joints and the rubber taper pieces to be totally bonded without leaving gaps. All connecting points at the middle part of the inner well pipe only need to upwards pull the inner well pipe by a certain height H for convenient operation in welding; as the outer pipe sealing joints and the rubber taper pieces are always totally bonded, the welding error factor is not considered; and the device is convenient and simple in construction, high in efficiency and excellent in effect.

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...

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Problems solved by technology

The inside of the outer well pipe is provided with a contact surface and an isolation structure that cooperate with the outer wall of the inner well pipe. Only when the length of each contact section is exactly the same can they maintain a sealed connection with each other. However, since the well depth is usually hundreds of meters, the outer well pipe and the inner well pipe Many independent sections of the well pipe are formed by welding, and different well depths require on-site cutting and welding operations. After the inner and outer well pipes are lowered separately, due to factors such as displacement, cutting errors, and welding errors, the degree of error accumulation is large. The contact sealing performance between the inner well pipe and the outer well pipe is not good, and it is actually difficult to achieve a sealed connection for all the isolation layers

In addition, because the sealing butt joint process takes place in the downhole, it is in a blind area, and cannot be operated, maintained and tested by people. The isolation layer will block the position of the welding joint. If the inner well pipe is pulled out and welded above the isolation layer, the inner well will be lowered after welding The accuracy of the pipe cannot be guaranteed, making the support strength and sealing tightness of the inner and outer well pipes unpredictable. This is an important problem in the construction of the same well recharge equipment. Use of air conditioner

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