CN201497412U

CN201497412U - U-shaped finned tube, solar heat-collecting tube and solar heat collector

Info

Publication number: CN201497412U
Application number: CN2009203061586U
Authority: CN
Inventors: 黄永伟; 黄奎林; 陆长俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-14
Filing date: 2009-07-14
Publication date: 2010-06-02
Anticipated expiration: 2019-07-14

Abstract

The utility model provides a U-shaped finned tube used for solar heat-collecting tubes, which can greatly reduce the thermal resistance between the vacuum heat-collecting tube and the fins and ensure good heat transfer effect and high heat collection efficiency. The utility model also provides a solar heat-collecting tube and a solar heat collector, which have high heat collection efficiency. The U-shaped finned tube comprises a U-shaped tube and longitudinal fins, wherein the U-shaped tube has two vertical tube bodies, the fins are arranged on the tube bodies, the fins have cylindrical curved surfaces, are arranged on the outer side of the tube bodies and are tangential to the tube bodies. The solar heat-collecting tube comprises a vacuum heat-collecting tube and the U-shaped finned tube, wherein the U-shaped finned tube is arranged inside the vacuum heat-collecting tube, and the semi-diameter of the fins is equal to the semi-diameter of the inner tube of the vacuum heat-collecting tube, so that the fins and the inner tube form the surface contact. The solar heat collector comprises a water intake pipe, a water discharge pipe and at least one solar heat-collecting tube, wherein the U-shaped tube of the solar heat-collecting tube is connected in parallel between the water intake pipe and the water discharge pipe. The U-shaped finned tube, the solar heat-collecting tube and the solar heat collector have the advantages of simple structure, novel design, good heat transfer effect and high heat collection efficiency.

Description

U type finned tube, solar energy heat collection pipe and solar thermal collector

Technical field

The utility model relates to a kind of U type finned tube, solar energy heat collection pipe and solar thermal collector.

Background technology

Existing U type tube type solar heat collecting pipe adopts the aluminium fin to conduct heat between U type pipe and vacuum heat collection pipe, because the aluminium fin is very not tight with contacting of U type pipe and vacuum tube inwall, thermal resistance is bigger between vacuum heat-collecting inside pipe wall and the aluminium fin, thereby heat-transfer effect is poor, thereby the thermal efficiency that has influence on solar thermal collector is not very high.CN200620077962.8 discloses the compound U type of a kind of copper aluminium pipe, U type pipe is provided with and the incorporate aluminium fin of outer aluminum pipe, solved the heat transfer problem between aluminium fin and the U type inner tube layer copper pipe well, but still there is the bigger problem of thermal resistance between vacuum heat-collecting inside pipe wall and the aluminium fin, make heat-transfer effect not satisfactory, influenced the thermal efficiency of solar thermal collector.

The utility model content

The utility model provides a kind of U type finned tube, is used for solar energy heat collection pipe, can reduce the thermal resistance between vacuum heat collection pipe and fin greatly, and heat-transfer effect is good, the collecting efficiency height.

The utility model also provides a kind of solar energy heat collection pipe, the collecting efficiency height.

The utility model also provides a kind of solar thermal collector, the collecting efficiency height.

Described U type finned tube comprises U type pipe and longitudinal fin, and U type pipe comprises two vertical bodys, and fin is located on the body, and described fin is a cylindrical surface, is located at the body outside, and tangent with body.Aforementioned cylindrical surface can be the part of cylindrical surface, also can be complete cylindrical surface.

As preferably, described fin has two, is divided on two bodys.Preferred scheme is that two fins join, and form the cylindrical surface of sealing.

As preferably, the tangent place of fin and body is the thickest, along with the tangent place of body apart from increase, fin thickness reduces gradually.

Above-mentioned fin and body are tangent can various schemes, tangent as fin inner curve and tube wall, and outer N-Side surf of preferred fin and tube wall are tangent.

As preferred version, the vertical body of U type pipe is the copper aluminum composite pipes body, and skin is an aluminum pipe, and internal layer is a copper pipe, and fin is the aluminium fin, and is integrated with tangent aluminum pipe.

Described solar energy heat collection pipe comprises vacuum heat collection pipe and described U type finned tube, and U type finned tube is located in the vacuum heat collection pipe, and described fin is identical with pipe radius in the vacuum heat collection pipe, both formation face contacts.

Described solar thermal collector comprises water inlet pipe, outlet pipe and at least one above-mentioned solar energy heat collection pipe, and the U type pipe of described solar energy heat collection pipe is connected in parallel between water inlet pipe and the outlet pipe.

The utility model is on the basis of traditional U type finned tube, by changing the shape and the position of fin, make and form tight face between fin and the vacuum heat collection pipe and contact, solved the heat transfer problem between vacuum heat-collecting inside pipe wall and the fin well, reduced the heat transfer resistance between the medium in collector tube inner wall and the U type pipe widely, thereby the collecting efficiency of solar thermal collector is greatly improved.When the vertical body of U type pipe is the copper aluminum composite pipes body, skin is an aluminum pipe, internal layer is a copper pipe, fin is the aluminium fin, and when being integrated with tangent aluminum pipe, by the aluminum pipe of tight parcel, the heat transfer efficiency between aluminium fin and the U type inner tube layer copper pipe increases greatly, further improves the collecting efficiency of solar energy heat collection pipe and solar thermal collector.

The utility model is simple in structure, novel, heat-transfer effect is good, collecting efficiency is high.

Description of drawings

Fig. 1 is the structural representation of described solar energy heat collection pipe;

Fig. 2 is the horizontal cross-section schematic diagram of described solar energy heat collection pipe;

Fig. 3 is for adopting the solar thermal collector structural representation of described solar energy heat collection pipe.

The specific embodiment

As shown in Figure 1, 2, solar energy heat collection pipe 5 comprises vacuum heat collection pipe 10 and U type finned tube 9, and U type finned tube 9 is located in the vacuum heat collection pipe 10.U type finned tube comprises U type pipe and two longitudinal fins 2, U type pipe comprises two vertical bodys, vertically body is a copper aluminum composite pipes, and internal layer is a copper pipe 3, and skin is an aluminum pipe 6, fin 2 lateral surfaces are half-cylindrical curved surface, be divided into two external sides of VERTICAL TUBE, the lateral surface of fin 2 and outer aluminum pipe 6 are tangent, and aluminum pipe 6 and fin 2 are integrated, two fins 2 join, and form the cylindrical surface of sealing.Fin 2 is the thickest with aluminum pipe 6 tangent places, along with tangent place apart from increase, fin 2 thickness reduce gradually.Pipe 4 and outer tube 1 in vacuum heat collection pipe 10 comprises, described fin 2 is identical with pipe 4 radiuses in the vacuum heat collection pipe, both formation face contacts.

As shown in Figure 3, solar thermal collector comprises water inlet pipe 7, outlet pipe 8 and Duo Gen solar energy heat collection pipe 5, and the U type finned tube 9 in the solar energy heat collection pipe 5 is connected in parallel between water inlet pipe 2 and the outlet pipe 3, during use, cold water enters U type finned tube 9 by water inlet pipe 2, and heating is after outlet pipe 3 outflows.

Claims

1. a U type finned tube comprises U type pipe and longitudinal fin, and U type pipe comprises two vertical bodys, and fin is located on the body, it is characterized in that, described fin is a cylindrical surface, is located at the body outside, and tangent with body.

2. U type finned tube as claimed in claim 1 is characterized in that, outer N-Side surf of fin and tube wall are tangent.

3. U type finned tube as claimed in claim 1 is characterized in that described fin has two, is divided on two bodys.

4. U type finned tube as claimed in claim 2 is characterized in that two fins join, and forms the cylindrical surface of sealing.

5. U type finned tube as claimed in claim 3 is characterized in that the lateral surface of two fins is half-cylindrical curved surface.

6. as each described U type finned tube among the claim 1-5, it is characterized in that the tangent place of fin and body is the thickest, along with the tangent place of body apart from increase, fin thickness reduces gradually.

7. as each described U type finned tube among the claim 1-5, it is characterized in that the vertical body of U type pipe is the copper aluminum composite pipes body, skin is an aluminum pipe, and internal layer is a copper pipe, and fin is the aluminium fin, and is integrated with aluminum pipe.

8. solar energy heat collection pipe comprises vacuum heat collection pipe and as U type finned tube as described in each among the claim 1-7, U type finned tube is located in the vacuum heat collection pipe, it is characterized in that, described fin is identical with pipe radius in the vacuum heat collection pipe, both formation faces contacts.

9. a solar thermal collector comprises water inlet pipe, outlet pipe and at least one solar energy heat collection pipe as claimed in claim 8, it is characterized in that, the U type pipe of described solar energy heat collection pipe is connected in parallel between water inlet pipe and the outlet pipe.