CN2527924Y

CN2527924Y - All glass solar vacuum heat-collecting tube with heat-conducting strip

Info

Publication number: CN2527924Y
Application number: CN02203576U
Authority: CN
Inventors: 杨雄声
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-25
Filing date: 2002-02-25
Publication date: 2002-12-25
Anticipated expiration: 2012-02-25

Abstract

Disclosed is an all-glass solar energy vacuum heat-accumulating pipe with a heat-conducting flake, comprising an outer transparent cover pipe, an inner heat absorption pipe and a vacuum interlayer. The heat-conducting flake is arranged inside the heat absorption pipe and contacts with an inner wall face of the heat absorption pipe so that solar radiant energy absorbed by an upper wall face of the heat absorption pipe can be transferred to the medium and lower part of fluid inside the pipe through the heat-conducting flake; the heated condition of the fluid inside the pipe can be improved; the heat-accumulating efficiency and the using performance of the vacuum heat-accumulating pipe can be increased; at the same time, the easy bursting of the pipe, when low-temperature fluid is infused after the heat-accumulating pipe is emptily dried, can be relieved to a certain extent.

Description

The full-glass solar energy collecting vacuum tube that has conducting strip

The utility model relates to a kind of solar energy heating pipe unit.

Existing full-glass solar energy collecting vacuum tube is introduced as Chinese patent 87210032, partly is made up of outer glass enclosure tube, interior endothermic tube and vacuum interlayer etc.Owing to adopted the vacuum barrier technique, avoided the influence of surrounding air to Heat-collecting effect, thermal-collecting tube can normally be used under the arctic weather condition, be a kind of comparatively advanced solar energy heat collector.But because the thermal conductivity of glass own is relatively poor, endothermic tube has caused the tube wall temperature inequality because of the surface towards difference, and then has influence on tube fluid, especially manages the thermal effect that is subjected to of interior middle and lower part fluid, makes the collecting efficiency of thermal-collecting tube be difficult to further raising.Another deficiency that exists is the impact that glass not too adapts to the big temperature difference of fluid, the thermal-collecting tube lack of water is empty shine after, temperature increases suddenly in the pipe, is easy to generate pipe explosion when refilling cryogen and scraps.This situation is more outstanding in using the relatively poor thermal-collecting tube of material.At above-mentioned deficiency, existing new improvement project proposes, and Chinese patent 962046191.1 has been introduced a kind of glass heat-collecting vacuum tube of new structure, is intended to improve the heating condition of thermal-collecting tube inner fluid.The thermal-collecting tube that this patent is introduced adopts the glass tube of placing a sealing two ends in heating tube, by reducing the contact condition that pipe inner flow passage sectional area improves tube fluid and tube wall, to realize improving the purpose of tube fluid heat exchange efficiency.Adopt that pipe internal volume and thermal capacity diminish after this scheme, rate of circulating flow is accelerated in the pipe, but because the glass tube of sealing two ends does not contact with endothermic tube, therefore the heat exchange area in the endothermic tube does not increase, can be very not desirable so adopt this structure to improve its result of heat transfer boundary condition of the fluid in the pipe.In fact rate of flow of fluid improves and can not guarantee that fluid is heated and speed up.Another patent No. is that the technological document of 99255540.X has been introduced a kind of employing absorption film heat recipient fluid is not contacted with the glass inner tube tube wall, thereby avoids glass inner tube to produce the method for explosion when adding cryogen.But do and can influence the thermal effect that is subjected to of heat recipient fluid like this.

Deficiency at prior art, the utility model discloses a kind of improved glass solar energy collecting vacuum tube, this thermal-collecting tube increases the area that changes in the endothermic tube by a kind of heat-transfer device, the heating condition of tube fluid is improved, thereby realize the purpose of the collecting efficiency of raising thermal-collecting tube.

The purpose of this utility model is to realize like this.

In the endothermic tube of existing vacuum heat collection pipe, adorn a conducting strip of making by metal, this conducting strip length equates substantially with endothermic tube, two Edge Bend cambers of conducting strip, its radian equates with the pore radian, conducting strip is put into after the endothermic tube, support by self makes the inwall applying up and down of arch section and endothermic tube, the solar radiation heat of endothermic tube upper wall absorption promptly is delivered to each position fluid in the endothermic tube through conducting strip like this, changed prior art a situation by upper tube wall transmission heat, thereby make the heat of high temperature transmission diffusion of assembling on the heat absorption tube wall, alleviated the booster problem that is easy to generate when refilling cryogen after the thermal-collecting tube sky shines.

Owing to implement such scheme, the metal conducting strip that is contained in the endothermic tube has increased the intraductal heat transfer area, the situation that the thermal efficiency that tube fluid is existed because of tube wall temperature is irregular is low is obviously improved, and the booster problem that is easy to generate after the empty solarization of thermal-collecting tube is alleviated to some extent.Therefore, the more existing technology of solar vacuum heat-collecting pipe that provides of the utility model has better serviceability.

Below in conjunction with drawings and Examples the utility model is further specified.Wherein:

Fig. 1: be this reality and novel preferred embodiment cross sectional representation;

Fig. 2, Fig. 3 are that the utility model example is selected the embodiment cross sectional representation.

1 outer glass enclosure tube, 2 interior endothermic tubes, 3 metal conducting strips, 4 vacuum interlayers among the figure

In Fig. 1 embodiment, metal conducting strip 3 both sides in the endothermic tube 2 are bent into " Z " font, after the bending up and down bent face be arc, and fit with endothermic tube 2 internal faces, linkage sections are stressed slightly crooked because of supporting in the middle of the metal conducting strip 3.In order to guarantee that metal conducting strip 3 can have good stickiness with endothermic tube 2 inwalls, the last lower camber side of metal conducting strip 3 and the angle between the middle linkage section should be slightly larger than the angle of linkage section and tube wall cambered surface, linkage section two ends spacing, be that linkage section length is slightly larger than endothermic tube 2 internal diameters, when the conducting strip 3 of press forming enters endothermic tube 2, conducting strip 3 cambered surfaces change under the support of middle linkage section with the angle of linkage section fits with endothermic tube 2 internal faces, at this moment linkage section shows slightly crooked because of stressed in the middle of, and whole conducting strip 3 remains on definite state because of each constitutes the geometric surface stress equalization.When occurring high temperature in the endothermic tube 2 and make conducting strip 3 thermal expansions, the interlude of conducting strip 3 is crooked to be strengthened, and has avoided the excessive support of 3 pairs of endothermic tube 2 inwalls of conducting strip to expand.

Compression moulding is adopted in the making of conducting strip 3.The good copper material of the preferred thermal conductivity factor of its material, all right aluminium, magnesium and other thermal conductivity preferred metal materials.Aluminium, magnesium material also have the formation of incrustation scale in the reduction endothermic tube 2, but service life and heat-conducting effect are not as good as copper material.

Consider that from economy and operating characteristic being used to make between thickness and endothermic tube 2 internal diameters of sheet metal of conducting strip 3 to have one to mate accordingly, too thin shortage support force is too thick uneconomical again.With 40 millimeters considerations of endothermic tube 2 internal diameters, the thickness of conducting strip 3 should be feasible in 0.3-0.5 millimeter scope.

Fig. 2 and the comparatively complicated conducting strip 3 of the cross sectional shape that Figure 3 shows that the example choosing.Select for use the comparatively complicated conducting strip 3 of cross sectional shape to make the endothermic tube 2 inner fluids better effects if of being heated, but also uneconomical from economic considerations.The utility model is all considered when preferred embodiment and is screened.Therefore, all designs with interior heat-transfer device of vacuum heat collection pipe of same idea also should be considered as protection domain of the present utility model.

Claims

1, a kind of vacuum solar heat-collecting pipe, comprise outer transparent vestlet, interior endothermic tube and vacuum interlayer, it is characterized in that being equipped with in the endothermic tube strip metal conducting strip, two Edge Bends of this conducting strip, hard storing goes in the endothermic tube and with the inside pipe wall face to contact, and after injecting fluid in the endothermic tube, conducting strip is dipped in the tube fluid.

2,, it is characterized in that it is the cambered surface contact that the interior conducting strip of endothermic tube contacts with inside pipe wall, and the cambered surface radian equates with endothermic tube inner hole surface radian according to claims 1 described vacuum heat collection pipe.

3, vacuum heat collection pipe according to claim 1 is characterized in that the conducting strip cross sectional shape in the endothermic tube can be polygon geometry, and has at least a position to contact with the inside pipe wall face.

4, vacuum heat collection pipe according to claim 1 is characterized in that conducting strip and the inside pipe wall contact site in the endothermic tube is directed upwardly at one of them position when thermal-collecting tube is installed.

5, vacuum heat collection pipe according to claim 1 is characterized in that conducting strip in the endothermic tube in the same way during bending, and the bending angle is less than 90 degree.

6, vacuum heat collection pipe according to claim 1 is characterized in that the interior conducting strip thickness of endothermic tube is less than 1 millimeter.