CN210980395U

CN210980395U - Heat exchange tube of solar heat collector

Info

Publication number: CN210980395U
Application number: CN201921726270.5U
Authority: CN
Inventors: 徐竹孟; 吴建军; 李明; 綦洪刚
Original assignee: Laizhou Jieli Industrial Co ltd
Current assignee: Laizhou Jieli Industrial Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-07-10
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a solar collector heat exchange tube, including two or more parallel connection, by the special-shaped heat exchange tube of aluminum alloy extrusion process production, different with prior art is: the special-shaped heat exchange tube comprises a body, wherein a cavity is formed in the body, the cross section outline of the body is approximately isosceles trapezoid, the body extends towards the left and right direction to form a wing plate, the body and the lower surface of the wing plate are coplanar and cut into a plurality of uniformly distributed grooves, the free end of the wing plate on one side is folded towards the lower surface of the wing plate to form a hook head, an anti-scaling coating is sprayed on the inner wall of the cavity, a condensation end of a heat transfer superconducting material is bonded in each groove through a heat-conducting silica gel, and the condensation end of the heat transfer superconducting material is buckled in the hook head and is tightly pressed by; and two ends of the body are respectively welded with an aluminum round pipe communicated with the cavity. Compared with the prior art, the utility model discloses heat transfer area of contact is big, and processing is simple, and is wear-resisting to lose, is difficult for being blockked up by the incrustation scale.

Description

Heat exchange tube of solar heat collector

Technical Field

The utility model belongs to the technical field of the solar collector and specifically relates to a solar collector heat exchange tube.

Background

The heat conversion efficiency of the flat plate type solar heat collector is an important index for evaluating the performance of the flat plate type solar heat collector. The working process of the flat plate type solar heat collector is as follows: sunlight irradiates the heat absorbing material in the heat collector to be converted into heat, the heat is transferred to the heat exchange tube from the heat absorbing material through the heat transfer medium, and then the heat is transferred into the heat preservation water tank through the medium flowing in the heat exchange tube. In the prior art, a heat conversion technology (such as a black chromium technology and a blue film technology) for converting sunlight into heat is mature, a heat superconducting material (also called a micro heat pipe) is mature, the photo-thermal conversion and the conduction efficiency are high, but a heat exchange technology from the heat superconducting material to a heat conduction medium in the heat exchange pipe is immature, the overall heat conversion efficiency of a flat plate collector is influenced, and the development of the flat plate solar collector technology is restricted like a bottleneck, so that a great space is provided for improvement.

The traditional heat collector has two heat exchange modes, one is a tube plate type, a heat exchange thin-wall copper tube is welded with a heat absorption film material, a heat transfer area is a straight line, the area is small, and the efficiency is low. The flat box type solar heat collector is characterized in that two metal plates are molded to form a medium flow channel and then welded together, and the outer surface of one metal plate with a solar heat absorption coating is used as a heat absorption plate, so that the flat box type solar heat collector has good heat transfer performance but is not pressure-resistant, water cannot be drained in winter, and the flat box type solar heat collector is easy to be blocked by scale and leak, has high welding requirements and is high in cost.

The novel heat exchange tube which is large in combination area with a heat transfer material, good in heat transfer performance, simple in processing technology, high in pressure resistance, capable of emptying internal stored water in winter, resistant to abrasion and not prone to being blocked by water scales is urgently needed.

Disclosure of Invention

The utility model aims at solving the above-mentioned technical problem or one of the above-mentioned technical problem that prior art exists, for this reason the utility model solves the technical scheme that its technical problem adopted and is:

the solar heat collector comprises two or more parallel-connected special-shaped heat exchange tubes produced by an aluminum alloy extrusion process, and is different from the prior art in that: the special-shaped heat exchange tube comprises a body, wherein a cavity is formed in the body, the cross section outline of the body is approximately isosceles trapezoid, the body extends towards the left and right direction to form a wing plate, the body and the lower surface of the wing plate are coplanar and cut into a plurality of uniformly distributed grooves, the free end of the wing plate on one side is folded towards the lower surface of the wing plate to form a hook head, an anti-scaling coating is sprayed on the inner wall of the cavity, a condensation end of a heat transfer superconducting material is bonded in each groove through a heat-conducting silica gel, and the condensation end of the heat transfer superconducting material is buckled in the hook head and is tightly pressed by; and two ends of the body are respectively welded with an aluminum round pipe communicated with the cavity.

According to a further preferable scheme, the cross section of the cavity is circular or long round, when the cross section is long round, plugs are welded to two ends of the cavity respectively, and the aluminum round pipe penetrates through the plugs in a sealed mode and is communicated with the cavity.

The utility model has the advantages that: compared with the prior art, the utility model discloses heat transfer area of contact is big, and heat absorption, conduction are fast, and processing is simple, and is withstand voltage high, can empty the inside water of depositing as required winter, and abrasion resistance is difficult for being blockked up by the incrustation scale, simple to operate, and it is simple to maintain, can show the heat conversion efficiency who improves solar collector, reduction in production cost improves life.

Drawings

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

FIG. 1 is a schematic structural view of example 1.

Fig. 2 is a schematic view of the structure of fig. 1 from another view angle.

Fig. 3 is a cross-sectional view of fig. 2.

Fig. 4 is a partially enlarged view of fig. 3.

FIG. 5 is a schematic structural view of example 2.

Fig. 6 is a schematic view of the structure of fig. 5 from another view angle.

Fig. 7 is a cross-sectional view of fig. 6.

Fig. 8 is a partially enlarged view of fig. 7.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention. Other parts of the present invention, such as the housing, the insulating barrel, the glass cover plate, the connecting pipe, etc., which are not described or described in detail, are well known to those skilled in the art.

Example 1. A flat plate solar collector shown in fig. 1-4, comprising 4 parallel-connected special-shaped heat exchange tubes 1 produced by an aluminum alloy extrusion process, wherein each special-shaped heat exchange tube 1 comprises a body 11 with a circular cross section and an approximately isosceles trapezoid overall cross section outline, the body 11 extends in the left-right direction to form wing plates 12, the body 11 is coplanar with the lower surfaces of the wing plates 12 and is cut into a plurality of uniformly-distributed grooves 13, the free end of one wing plate 12 is folded towards the lower surface to form a hook head 14, an anti-scaling coating 2 is sprayed on the inner wall of the cavity, a condensation end of a heat-transfer superconducting material is bonded in each groove 13 through a heat-conducting silica gel, and the condensation end of the heat-transfer superconducting material is buckled in the hook head 14 and is tightly pressed by the hook head 14; and the two ends of the body 11 are respectively welded with the aluminum round pipes 3 communicated with the cavity.

The heat-conducting silica gel is bonded with the heat-conducting superconducting material, so that the condensation end of the heat-conducting superconducting material can be tightly combined with the special-shaped heat exchange tube, and the heat conduction loss is small; the wing plates 12 formed by extending the body 11 in the left-right direction can greatly increase the heat absorption area of the heat transfer superconducting material, transfer heat to the heat transfer medium in the cavity, and transfer the collected heat to the heat-insulating barrel by the heat transfer medium; the anti-scaling coating sprayed on the inner wall of the cavity can prevent scale from generating, and the service life and the anti-corrosion capability of the heat exchange tube are improved.

Embodiment 2, a flat plate solar collector shown in fig. 5 to 8, is otherwise the same as embodiment 1, except that the cross-sectional shape of the cavity is oblong, plugs 4 are respectively welded to both ends of the cavity, and the aluminum round tube 3 is hermetically penetrated through the plugs 4 and then communicated with the cavity.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar heat collector comprises two or more parallel-connected special-shaped heat exchange tubes (1) produced by an aluminum alloy extrusion process, and is characterized in that: the special-shaped heat exchange tube (1) comprises a body (11) which is internally provided with a cavity and has a roughly isosceles trapezoid cross section outline, the body (11) extends in the left-right direction to form a wing plate (12), the body (11) and the lower surface of the wing plate (12) are coplanar and cut into a plurality of uniformly distributed grooves (13), the free end of the wing plate (12) on one side is turned over to the lower surface of the body to form a hook head (14), an anti-scaling coating (2) is sprayed on the inner wall of the cavity, a condensation end of a heat transfer superconducting material is bonded in each groove (13) through a heat-conducting silica gel, and the condensation end of the heat transfer superconducting material is buckled in the hook head (14) and is tightly pressed by the hook head (14); and the two ends of the body (11) are respectively welded with the aluminum round pipes (3) communicated with the cavity.

2. A solar thermal collector according to claim 1, wherein: the cross section of the cavity is circular or long round, when the cross section is long round, plugs (4) are welded to two ends of the cavity respectively, and the aluminum round pipe (3) penetrates through the plugs (4) in a sealing mode and then is communicated with the cavity.