CN211345937U

CN211345937U - Water source heat pump single well pumping and recharging system

Info

Publication number: CN211345937U
Application number: CN202020071990.9U
Authority: CN
Inventors: 吴金星; 史兆臣; 杨晓丽; 修浩然
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-08-25
Anticipated expiration: 2030-01-14

Abstract

The utility model discloses a water source heat pump single well is drawn water and is irritated system again mainly includes water source well, drinking-water pipe, immersible pump, evaporimeter, wet return, return branch pipe and coarse grit layer, its characterized in that: a water source well is internally provided with a water pumping pipe, the lower end of the water pumping pipe is provided with a submersible pump, the upper end of the water pumping pipe is connected with a water inlet of an evaporator, a water outlet of the evaporator is connected with a water return pipe, the water return pipe is connected with a plurality of water return branch pipes, a coarse gravel layer is arranged around the water source well, the water return branch pipes are arranged in the coarse gravel layer, the pipe walls of the water return branch pipes are provided with a plurality of water outlet holes, the lower part of the water source well is provided with a larger gravel layer, and the well wall of; and after the return water exchanges heat with the coarse gravel layer and the surrounding soil through the return water branch pipe, a circulation loop is formed by the hole opened on the well wall of the water source well and the larger gravel layer on the lower part of the well wall. The utility model discloses can promote groundwater abundant recharge, improve the heat transfer effect of return water and soil, and the construction is simple, and installation easy maintenance has practiced thrift the energy greatly.

Description

Water source heat pump single well pumping and recharging system

Technical Field

The utility model relates to a heat pump technical field especially relates to a water source heat pump single well is drawn water and is recharged system.

Background

In the era of increasingly serious energy crisis and continuously worsened environmental pollution, research and application of energy-saving technology are increased, and the method has a profound significance for realizing sustainable development war. The water source heat pump is an efficient energy-saving air conditioning system, and realizes heat supply and refrigeration by utilizing geothermal resources stored in underground water. The water source heat pump has the advantage that the low-level heat energy can be transferred to the high-level heat energy by inputting a small amount of high-level energy. The underground water is used as a heat source during heating by the heat pump and as a cold source during refrigeration. Compared with the traditional oil-fired, coal-fired and natural gas boilers, the water source heat pump not only can save a large amount of conventional energy, but also can reduce the pollution to the environment. However, the conventional water source heat pump technology has some problems, such as that the water for exchanging heat cannot be fully recharged to the underground, so that the waste of underground water is caused, the underground water level is reduced and even exhausted, and further the safety of surrounding buildings is influenced. The existing single-well heat exchange water quantity is limited, a heat source cannot be used as a heat source for heat exchange for a long time due to the fact that the temperature reaches a threshold value, the heat exchange area between return water of a single well and surrounding soil is limited, heat exchange efficiency is reduced, and the performance stability of a water source heat pump technology is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a water source heat pump single-well pumping and recharging system.

The utility model adopts the technical proposal that: the utility model provides a water source heat pump single well is drawn water and is irritated system, mainly includes water source well, drinking-water pipe, immersible pump, evaporimeter, wet return, return branch pipe and coarse sand gravel layer, its characterized in that: a water pumping pipe is arranged in the water source well, a submersible pump is arranged at the lower end of the water pumping pipe, and the upper end of the water pumping pipe is connected with a water inlet of an evaporator of the water source heat pump system; the water outlet of the evaporator is connected with a water return pipe, and the water return pipe is connected with a plurality of water return branch pipes; a coarse gravel layer is arranged around the water source well, a water return branch pipe is arranged in the coarse gravel layer, and a plurality of water outlet holes with the diameter of 2-5mm are formed in the pipe wall of the water return branch pipe; the lower part of the water source well is provided with a larger gravel layer, holes with the diameter of 20-50mm are arranged on the well wall below the water source well at a distance of 15 m from the well mouth, the number of the holes in the circumferential direction of the well wall is 4-8, and the hole interval in the longitudinal direction of the well wall is 1-2 m; and after the return water exchanges heat with the coarse gravel layer and the surrounding soil through the return water branch pipe, a circulation loop is formed by the hole opened on the well wall of the water source well and the larger gravel layer on the lower part of the well wall.

The number of the backwater branch pipes in the coarse gravel layer around the water source well is 10-15, and the material adopts PVC plastic pipes.

The backwater branch pipes are uniformly distributed around the water source well, and the distance between the backwater branch pipes and the wall of the water source well is 0.5-1 m.

Compared with the prior art, the beneficial effects of the utility model are that: the backwater passes through the backwater branch pipe and the coarse gravel layer, and forms a circulation loop from the hole on the well wall of the water source well and the larger gravel layer at the lower part of the hole, so that the sufficient recharging of the backwater is promoted, the heat exchange effect of the backwater and the soil is improved, the construction is simple, the installation and the maintenance are convenient, the stability of the performance of the heat pump system is greatly improved, and the energy is saved; the pipe wall of the backwater branch pipe is provided with a plurality of water outlet holes, so that backwater can fully enter the coarse gravel layer, backwater recharging and sufficient heat exchange with surrounding soil are promoted, and the heat exchange effect of the backwater and the soil is improved.

Drawings

FIG. 1 is a schematic diagram of a water source heat pump single well pumping and recharging system.

Reference numerals: 1-a backwater branch pipe; 2-a submersible pump; 3-a water source well; 4-coarse gravel layer; 5-a water return pipe; 6-a water pumping pipe; 7-evaporator.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model discloses a specific embodiment as follows: firstly, drilling a water well with the diameter larger than that of a coarse gravel layer, then backfilling larger gravel to the bottom of the water well, then installing a well pipe of a water source well at the center of the water well, installing a return water branch pipe around the water source well, then backfilling the surrounding space of the water source well and the return water branch pipe with the coarse gravel, and playing a role of fixing the return water branch pipe; a submersible pump and a water pumping pipe are arranged in a water source well, the water pumping pipe is connected with an inlet of an evaporator, an outlet of the evaporator is connected with a water return pipe, and the water return pipe is connected with a water return branch pipe, so that a single-well water pumping and water return circulating system of the water source heat pump is formed.

The utility model discloses a concrete operation as follows: when the single-well pumping and recharging system of the water source heat pump operates, the submersible pump pumps water from the water source well through the pumping pipe and enters the evaporator, after heat exchange is completed in the evaporator, return water enters the return pipe, the return pipe distributes the return water to the return branch pipes, the return water enters the coarse gravel layer through the water outlet holes in the pipe walls of the return branch pipes and fully exchanges heat with coarse gravel, the return water in the coarse gravel layer enters the water source well through the opening in the well wall of the water source well or enters the water source well from the larger gravel layer at the lower part of the water source well and is pumped out by the submersible pump, water circulation is completed, and efficient heat exchange is realized.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a water source heat pump single well is drawn water and is irritated system, mainly includes water source well, drinking-water pipe, immersible pump, evaporimeter, wet return, return branch pipe and coarse sand gravel layer, its characterized in that: a water pumping pipe is arranged in the water source well, a submersible pump is arranged at the lower end of the water pumping pipe, and the upper end of the water pumping pipe is connected with a water inlet of an evaporator of the water source heat pump system; the water outlet of the evaporator is connected with a water return pipe, and the water return pipe is connected with a plurality of water return branch pipes; a coarse gravel layer is arranged around the water source well, a water return branch pipe is arranged in the coarse gravel layer, and a plurality of water outlet holes with the diameter of 2-5mm are formed in the pipe wall of the water return branch pipe; the lower part of the water source well is provided with a larger gravel layer, holes with the diameter of 20-50mm are arranged on the well wall below the water source well at a distance of 15 m from the well mouth, the number of the holes in the circumferential direction of the well wall is 4-8, and the hole interval in the longitudinal direction of the well wall is 1-2 m; and after the return water exchanges heat with the coarse gravel layer and the surrounding soil through the return water branch pipe, a circulation loop is formed by the hole opened on the well wall of the water source well and the larger gravel layer on the lower part of the well wall.

2. The water source heat pump single well pumping and recharging system of claim 1, wherein: the number of the backwater branch pipes in the coarse gravel layer around the water source well is 10-15, and the material adopts PVC plastic pipes.

3. The water source heat pump single well pumping and recharging system of claim 1, wherein: the backwater branch pipes are uniformly distributed around the water source well, and the distance between the backwater branch pipes and the wall of the water source well is 0.5-1 m.