CN102778055A

CN102778055A - Solar collector tube with U-shaped inner tube

Info

Publication number: CN102778055A
Application number: CN2012102507859A
Authority: CN
Inventors: 王宝根
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-16
Filing date: 2012-07-16
Publication date: 2012-11-14

Abstract

A solar collector tube with a U-shaped inner tube comprises an outer glass tube and an inner glass tube sleeved inside the outer glass tube. The solar collector tube is characterized in that the inner glass tube is the U-shaped glass inner tube, two orifices of the U-shaped glass inner tube are arranged at the same end of the inner glass tube and are inserted into a water collecting header, a semi-arc-shaped reflecting film is arranged on the portion, which faces the sun, of the inner surface of the outer glass tube, and the inner glass tube is positioned at a focusing position of the reflecting film so that sunlight irradiating on the reflecting film is reflected and focused into the U-shaped inner glass tube; an infrared-radiation-preventive film is arranged on the inner wall of the U-shaped inner glass tube and can effectively prevent infrared rays inside the U-shaped inner glass tube from leaking out; and a solar absorbing film is arranged on the outer wall of the U-shaped inner glass tube and can quickly and effectively absorb solar energy radiating on the U-shaped inner glass tube. The solar collector tube with the internal U-shaped inner tube overcomes shortcomings of an existing solar collector, is used for the solar collector, and has the advantages of simplicity in manufacturing process, speediness in starting, low cost, reliability in use, wide thermal absorption area, high thermal utilization factor, long service life and the like.

Description

The solar energy heat collection pipe of pipe in the U-shaped

One, technical field

The present invention relates to a kind of solar energy heat collection pipe, especially a kind of be used for heat collector in the solar energy heat collection pipe of pipe in the U-shaped is arranged.

Two, background technology

At present, solar energy heat collection pipe generally is the sealing of an end opening one end, i.e. blind pipe.The density contrast that the natural recirculating type hot-water heating system of being made up of them often relies on the different generations of water temperature in heat collector and the water storage box carries out temperature difference circulation (thermosyphon circulation), and its water circulating speed is higher, and heat utilization efficiency is not high.

The inner and outer pipes and the junction of the vacuum solar heat-collecting pipe that generally uses at present are glass; Inner and outer pipes is evacuated between the inner and outer pipes for being rigidly connected, and whole pipe is as a glass liner of a thermos flask that ten minutes is elongated; This thermal-collecting tube is because the inner and outer pipes temperature difference is easy to generate booster; Need make with the very little heat resistant glass of thermal coefficient of expansion, technology is complicated, and cost is high.

Though be coated with coating to improve the absorptivity to solar radiation at interior tube-surface, pipe is interior not to have reflection, beam condensing unit, and because there is infrared emanation in the interior high-temp liquid of pipe, it is bigger to the extraradial thermal losses of thermal-collecting tube, makes the solar thermal utilization rate not high.

Three, summary of the invention

The objective of the invention is to solve the deficiency of above-mentioned existing heat collector; Provide a kind of be used for heat collector in the solar energy heat collection pipe of pipe in the U-shaped is arranged, make its have manufacturing process simple, start fast, cost is lower, use is reliable, endotherm area is wide, heat utilization efficiency is high and characteristics such as long service life.

The objective of the invention is to adopt following scheme to realize: the solar energy heat collection pipe of pipe in a kind of U-shaped; It comprises glass outer tube and the glass inner tube that is enclosed within the glass outer tube; Be characterized in: said glass inner tube is a pipe in the glass U-shaped, and its two mouths of pipe are joining in the header tank with end and insertion; The outer pipe internal surface of said glass has the reflectance coating of semicircular arc towards the part of the sun, and glass inner tube is positioned at focusing place of reflectance coating, will shine in sunshine reflect focalization on the reflectance coating manages in the glass U-shaped; On the said glass U-shaped inner tube wall anti-infrared radiation film is arranged, can prevent effectively that the infrared ray in the pipe leaks outside in the glass U-shaped; On the glass U-shaped outer wall of inner tube solar absorbing film is arranged, can effectively absorb the solar energy that shines on managing in the glass U-shaped fast.

Water inlet pipe and outlet pipe are arranged in the above-mentioned header tank, and two mouths of pipe of pipe are respectively as import and outlet in the glass U-shaped, and import is communicated with the water inlet pipe that joins header tank; Outlet is communicated with the outlet pipe that joins header tank; So that water or air are got into by import, flow out from outlet, realize the circulation heating.

The present invention adopts the beneficial effect of such scheme to be: 1) manage the inner bag of making thermal-collecting tube in the effective U-shaped of this solar energy heating, can effectively prevent the breakage of the inner bag of thermal-collecting tube, make it not fragile, long service life; 2) setting of pipe internal reflection film, and interior pipe is eccentric to be provided with, and makes solar focusing in interior pipe, improves collecting efficiency, and pipe is equivalent to pipe in two in the U-shaped, makes its endotherm area wide, and adds the hot water amount; 3) infrared emanation in the glass inner tube can be reflected back by anti-infrared radiation film and reflectance coating, reduces heat loss, and heat utilization efficiency is high; 4) pipe can carry out water or air circulation after inserting water tank in the U-shaped, improves the efficiency of heating surface, makes it can be used for running water circulation heating or air circulation heating.

Four, description of drawings

Fig. 1 is the three-dimensional structure diagram of the solar energy heat collection pipe of pipe in a kind of U-shaped of the present invention;

Fig. 2 is the A-A cutaway view among Fig. 1;

Fig. 3 is an another kind of structure of the present invention.

Label declaration in each width of cloth accompanying drawing is following:

1-joins header tank; The 1a-water inlet pipe; The 1b-outlet pipe; 2-glass outer tube; Pipe in the 3-glass U-shaped; The 3a-import; The 3b-outlet; The 4-solar absorbing film; 5-anti-infrared radiation film; The 6-reflectance coating.

Five, the specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the solar energy heat collection pipe of managing in a kind of U-shaped of the present invention is described in detail.

As shown in Figure 1, the solar energy heat collection pipe of pipe in a kind of U-shaped, it comprises by glass outer tube 2 and is enclosed within the glass U-shaped in the glass outer tube 2 manages 3.

As import 3a and outlet 3b, join in the header tank 1 has water inlet pipe 1a and outlet pipe 1b to two mouths of pipe of pipe 3 respectively in the glass U-shaped, and import 3a inserts to join in the header tank 1 and is communicated with water inlet pipe 1a, and outlet 3b inserts to join in the header tank 1 and is communicated with outlet pipe 1b.As shown in Figure 1, water inlet pipe 1a and outlet pipe 1b are provided with up and down, manage 3 import 3a simultaneously in the glass U-shaped and export 3b and stretch out glass outer tube 2 different length, make import 3a insert water inlet pipe 1a, outlet 3b insertion outlet pipe 1b.As shown in Figure 2, be provided with about water inlet pipe 1a and outlet pipe 1b, the import 3a of the interior pipe 3 of glass U-shaped this moment stretches out glass outer tube 2 the same length with outlet 3b and gets final product.Like this, water or air are got into by import, flow out from outlet, can realize the circulation heating.

As shown in Figure 2; Glass outer tube 2 inner surfaces have the reflectance coating 6 of semicircular arc towards the part of the sun; Glass outer tube 2 is provided with glass inner tube 3 off-centre, and pipe 3 is positioned at focusing place of reflectance coating 6 in the glass U-shaped, and the solar energy reflection that can will shine on the reflectance coating 6 focuses in the interior pipe 3 of glass U-shaped.

As shown in Figure 1, on pipe 3 inwalls anti-infrared radiation film 4 is arranged in the glass U-shaped, can prevent effectively that the infrared ray in the pipe 3 leaks outside in the glass U-shaped, reduce heat radiation; On pipe 3 outer walls solar absorbing film 5 is arranged in the glass U-shaped, can effectively shine the solar energy on the pipe 3 in the glass U-shaped fast to absorption.

Claims

1. the solar energy heat collection pipe of pipe in the U-shaped, it comprises glass outer tube (2) and the glass inner tube that is enclosed within the glass outer tube (2), it is characterized in that: said glass inner tube is a pipe (3) in the glass U-shaped, its two mouths of pipe are with end and insert in the couplet header tank (1); Said glass outer tube (2) inner surface has the reflectance coating (6) of semicircular arc towards the part of the sun, and glass inner tube is positioned at focusing place of reflectance coating (6), will shine sunshine reflect focalization on the reflectance coating (6) in the glass U-shaped in the pipe (3); On pipe (3) inwall anti-infrared radiation film is arranged in the said glass U-shaped, can prevent effectively that the infrared ray in the pipe (3) leaks outside in the glass U-shaped; On pipe (3) outer wall solar absorbing film (4) is arranged in the glass U-shaped, can effectively absorb the solar energy that shines on the interior pipe of glass U-shaped (3) fast.

2. the solar energy heat collection pipe of pipe in the U-shaped according to claim 1; It is characterized in that: water inlet pipe (1a) and outlet pipe (1b) are arranged in the said header tank (1), and two mouths of pipe of pipe (3) are respectively as import (3a) and outlet (3b) in the glass U-shaped, and import (3a) is communicated with the water inlet pipe (1a) that joins header tank (1); Outlet (3b) is communicated with the outlet pipe (1b) that joins header tank (1); So that water or air are got into by import (3a), flow out from outlet (3b), realize the circulation heating.