CN219572317U

CN219572317U - Buried heat exchange tube of ground source heat pump

Info

Publication number: CN219572317U
Application number: CN202320817168.6U
Authority: CN
Inventors: 王治臻; 李楠; 周稼豪; 黎晔; 胡自成
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-08-22
Anticipated expiration: 2033-04-13

Abstract

The utility model provides a buried heat exchange tube of a ground source heat pump, wherein fins are arranged outside the heat exchange tube, the fins are perpendicular to the heat exchange tube, supporting rods are connected in series between the fins, supporting sleeves are arranged on the supporting rods between every two fins, the heat exchange tube and the fins are made of plastic materials, clamping grooves are formed in the outer side of the heat exchange tube, and the fins are clamped on the clamping grooves. According to the buried heat exchange tube of the ground source heat pump, the fin structure is arranged outside the tube, so that the heat transfer coefficient between the heat exchange tube and soil is increased, and the heat exchange efficiency is improved. The fins are supported in an auxiliary mode through additional supporting rods, and sand backfilled during construction is prevented from forcing the fins to slide or bend and deform.

Description

Buried heat exchange tube of ground source heat pump

Technical Field

The utility model belongs to the technical field of ground source heat pumps, and particularly relates to a buried heat exchange tube of a ground source heat pump.

Background

The buried pipe is an important heat exchange component in the shallow ground source heat pump system, and a single U-shaped structure and a double U-shaped structure are common. The heat exchange efficiency of the buried pipe is an important factor affecting the performance of the heat pump system. The existing technical means for improving the heat exchange efficiency of the buried pipe are to increase the inlet speed of fluid, change the backfill material with larger heat conductivity coefficient and heat diffusion coefficient, and the like. Wherein increasing the fluid inlet velocity is not significant to the improvement of heat exchange efficiency, and increases the energy consumption for transportation; after the heat conductivity of the backfill material exceeds the heat conductivity of surrounding soil, the heat conductivity of the backfill material is increased, so that the heat exchange efficiency is difficult to improve.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a ground source heat pump buried heat exchange tube which is used for improving the heat exchange efficiency of the buried tube.

The present utility model achieves the above technical object by the following technical means.

A buried heat exchange tube of a ground source heat pump is provided, fins are arranged outside the heat exchange tube and are perpendicular to the heat exchange tube, and support rods are connected between the fins in series.

Further, a supporting sleeve is arranged on the supporting rod between every two fins.

Further, the support sleeve is connected with the support rod through a screw or a pin.

Further, the two ends of the supporting rod are respectively fixed at the wellhead and the bottom of the buried pipe.

Further, the heat exchange tube and the fins are made of plastic materials, clamping grooves are formed in the outer sides of the heat exchange tubes, and the fins are clamped on the clamping grooves.

Further, a plurality of fracture cracks are arranged on the heat exchange tube connecting holes of the fins, and the fracture cracks are distributed annularly along the connecting holes.

Further, the depth of the clamping groove is more than or equal to 5mm.

The beneficial effects of the utility model are as follows:

(1) The utility model provides a buried heat exchange tube of a ground source heat pump, which increases the heat transfer coefficient between the heat exchange tube and soil and improves the heat exchange efficiency by arranging a fin structure outside the tube. The fins are supported in an auxiliary mode through additional supporting rods, and sand backfilled during construction is prevented from forcing the fins to slide or bend and deform.

(2) According to the utility model, the fins are assembled by using the clamping grooves in a clamping manner, and the assembly process is simple and practical.

Drawings

FIG. 1 is a diagram of a heat exchange tube according to the present utility model;

FIG. 2 is a diagram of a fin structure according to the present utility model;

fig. 3 is a cross-sectional view of the heat exchange tube of the present utility model.

Reference numerals:

1-a heat exchange tube; 11-clamping grooves; 2-fins; 21-fracture;

3-supporting rods; 31-a supporting sleeve; 32-screws.

Detailed Description

Embodiments of the present utility model will be described in detail below, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1, fins 2 are arranged outside the heat exchange tube 1 in a U-shaped structure, the fins 2 are arranged perpendicular to the heat exchange tube 1, and a plurality of fins 2 are uniformly distributed at equal intervals along the heat exchange tube 1. A supporting rod 3 is connected in series between the fins for assisting in fixing. The length of the support rod 3 is the same as that of the heat exchange tube 1, and the upper end and the lower end are respectively connected and fixed with the well mouth and the well bottom of the buried tube in a threaded connection mode. The support rods 3 are sleeved with a plurality of support sleeves 31, and each support sleeve 31 is respectively positioned between every two fins 2 and used for supporting the fins 2 in the vertical direction. The support sleeve 31 and the support rod 3 can be fixed by adopting a screw 32 or a pin, etc.

As shown in fig. 2 and 3, in the present utility model, the heat exchange tube 1 and the fins 2 are made of high density polyethylene, and are difficult to weld due to the plastic. Therefore, in order to achieve tight connection, the outer side of the heat exchange tube 1 is provided with an annular clamping groove 11, and the depth of the clamping groove 11 is at least 5mm; the fin 2 is clamped by the clamping groove 11. Meanwhile, in order to facilitate the assembly of the fins, a plurality of fracture cracks 21 which are distributed in an annular mode are formed in the connecting holes of the heat exchange tubes of the fins 2. When the heat exchange tube 1 penetrates into the heat exchange tube connecting holes of the fins 2, the plastic toughness is utilized to expand the heat exchange tube connecting holes until the heat exchange tube connecting holes penetrate into the corresponding clamping grooves 11, and the connecting holes elastically shrink to bite the clamping grooves 11.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The present utility model is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations which can be made by one skilled in the art without departing from the spirit of the utility model fall within the scope of the utility model.

Claims

1. The utility model provides a ground source heat pump buries heat exchange tube which characterized in that: fins (2) are arranged outside the heat exchange tube (1), the fins (2) are perpendicular to the heat exchange tube (1), and support rods (3) are connected between the fins (2) in series.

2. A ground source heat pump buried heat exchange pipe according to claim 1, characterized in that: a supporting sleeve (31) is arranged on the supporting rod (3) between every two fins (2).

3. A ground source heat pump buried heat exchange pipe according to claim 2, characterized in that: the supporting sleeve (31) is connected with the supporting rod (3) through screws or pins.

4. A ground source heat pump buried heat exchange pipe according to claim 1, characterized in that: and two ends of the supporting rod (3) are respectively fixed at the wellhead and the bottom of the buried pipe.

5. A ground source heat pump buried heat exchange pipe according to claim 1, characterized in that: the heat exchange tube (1) and the fins (2) are made of plastic materials, clamping grooves (11) are formed in the outer sides of the heat exchange tube (1), and the fins (2) are clamped on the clamping grooves (11).

6. A ground source heat pump buried heat exchange pipe according to claim 5, characterized in that: a plurality of fracture cracks (21) are formed in the heat exchange tube connecting holes of the fins (2), and the fracture cracks (21) are distributed annularly along the connecting holes.

7. A ground source heat pump buried heat exchange pipe according to claim 5, characterized in that: the depth of the clamping groove (11) is more than or equal to 5mm.