CN2377497Y

CN2377497Y - Solar by-pass heat pipe

Info

Publication number: CN2377497Y
Application number: CN99204239U
Authority: CN
Inventors: 鲍大同; 鲍昱
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-10
Filing date: 1999-03-10
Publication date: 2000-05-10
Anticipated expiration: 2009-03-10

Abstract

The utility model relates to a solar by-pass heat pipe, which belongs to the solar heat utilization device. The solar by-pass heat pipe adopts a coating semicircular arc solar plate which is provided with a by-pass pipe structure. The solar plate is sealed in a double-layer coaxial transparent vacuum glass pipe by a pipe plug. A heat release segment is denuded on the outside of the pipe. The solar by-pass heat pipe is formed by that the space of the pipe is made to low vacuum. The utility model has the characteristics of small heat capacity, quick start-up and high heat-transfer efficiency, and can eliminate air resistance and implement the shunting of air and liquid. The utility model adopts vacuum insulation, and has the advantages of low thermal losses, simple structure and high durability. The solar by-pass heat pipe has no the abuses, such as scale formation, frost crack, pipe burst, etc. The solar by-pass heat pipe can form various solar heat utilization devices, and can be used for various areas.

Description

Solar energy bypass heat pipe

The utility model belongs to solar energy heat utilization device, particularly about utilizing the solar energy bypass heat pipe that Working fluid phase changing conducts heat and the vacuum heat-insulating technology is made.

Solar energy be a kind ofly can freely utilize, pollution-free, the lasting energy that energy density is not high.People are doing a large amount of work aspect the exploration solar thermal utilization for a long time, and this class work must solve four key technologies bar none: the one, improve the thermal efficiency of gathering solar radiant heat, and the 2nd, the minimizing thermal losses.The 3rd, low-cost, the 4th, durable in use.In numerous solar energy heat collectors, there are two kinds of products more successful.A kind of is " all glass vacuum heat collection tube of solar energy ", the patent No. 85100142.4, employing is in the scheme of the inner glass tube surface of coaxial double-layer glass tube with vacuum coating magnetron sputtering coating for selective absorption, be conceived to improve solar absorptance, lower the emission ratio, adopt simultaneously the vacuum heat-insulation technology again, reduce thermal losses, the water class working medium in the pipe is heated to obtain solar radiation heat energy.Another kind is " a crooked absorber plate heat pipe type vacuum pipe ", the patent No. 96241289, the heat pipe that employing will be equipped with the crooked absorber plate of coating for selective absorption is encapsulated in the interior scheme of single-layer and transparent glass tube with vacuum, utilize the Working fluid phase changing heat transfer technology in the heat pipe, the working medium heating that heat pipe release end of heat pipe is outer utilizes the vacuum heat-insulation technology to reduce thermal losses simultaneously again to obtain solar radiation heat energy.Above-mentioned two kinds of devices have obtained bigger development haveing breakthrough aspect the key technologies such as the raising thermal efficiency, minimizing thermal losses.Yet these two kinds of devices remain in many defectives.The former defective is that water does not flow in glass tube with vacuum, and easily fouling year in and year out in the easy bursting by freezing of extremely frigid zones, causes the vacuum glass pipe explosion because of sky shines back water inlet suddenly sometimes.The latter's defective is need to adopt complicated glass----metal fever press-sealing process, the cost height, and sealing part metal end heat waste is bigger, has crackedly during glass-dead seal, and the bending section of heat pipe easily produces vapour lock, and heat transfer efficiency descends on the contrary, even is difficult to conduct heat.Therefore, these defectives have become the major obstacle of these two kinds of solar energy heat collector promotion and application.

The purpose of this utility model is to provide a kind of can overcome above-mentioned defective, employing will be coated with the bypass heat pipe of the band bypass pipe structure of half garden arc solar panel, be encapsulated in the double-layer coaxial transparent vacuum glass tube, the exposed scheme of release end of heat, constitute solar energy bypass heat pipe, make it in the phase-change heat transfer process, eliminate vapour lock, implementing gas-liquid shunts mutually, can further improve heat transfer efficiency, simultaneously can utilize the vacuum heat-insulation technology again, reduce thermal losses, and it is simple in structure, with low cost, durable in use, no bursting by freezing, fouling, the worry of booster can constitute various solar energy heat utilization devices and use in all kinds of areas.

The utility model is achieved in that the bypass heat pipe that will the band bypass pipe structure of half garden arc solar panel be housed is encapsulated in the double-layer coaxial transparent vacuum glass tube, the mouth of pipe seals with pipe close, heat release section is exposed to outside the pipe, and vacuum is made in the space in will managing again, promptly constitutes solar energy bypass heat pipe.Described bypass heat pipe is a kind of heat pipe with band bypass pipe structure.This bypass heat pipe is welded into inner intercommunication and airtight tubular container for three sections by heat release pipe, bypass pipe, endothermic tube.Three sections centerline are all made with copper pipe or other material in same plane, place a certain amount of water class working medium again and make P≤5 * 10 in pipe ^-2The Pa vacuum.The endothermic tube upper bend becomes " L " shape, and bent-up end is communicated with the bypass pipe flat segments, and straight section extends to glass tube with vacuum bottom and parallel with its axis always; The bypass pipe lower knuckle becomes " L " shape, and straight section is shorter, is communicated with the heat release pipe along axis, and bent-up end is connected on the flat segments of endothermic tube crooked position extension.The two interconnective position constitutes the logical quadrilateral structure of ring.The effect particular importance of this structure: the one, bypass action is condensed into liquid working medium under the gravity effect for selecting steam bleeding latent heat, flows back to endothermic tube by the heat release pipe through bypass pipe again; The 2nd, the fluid-tight effect, the crooked position that a spot of liquid refrigerant is stored in bypass pipe forms fluid-tight, stops gaseous working medium to enter, and forces it still to enter the heat release pipe along the bending section on endothermic tube top; The 3rd, eliminate the vapour lock effect, shunt mutually just because of under the double action of bypass and fluid-tight, realized gas-liquid, so liquid refrigerant just is unlikely to form vapour lock in endothermic tube upper bend section because of flow velocity slows down, blocks pipe path.This shows to have the bypass heat pipe of bypass pipe structure,, further improve phase-change heat transfer efficient, important role is arranged eliminating vapour lock in the phase-change heat transfer process, implementing gas-liquid and shunt mutually.Described solar panel is to be pressed into half garden arc component by copper coin, is coated on outside the endothermic tube, and at its outer surface coating magnetron sputtering coating for selective absorption.Pipe close silicon rubber manufacturing, effect has three: one, supports and make the heat pipe location; The 2nd, the sealed vacuum glass tube makes the interior space of pipe can keep P≤5 * 10 for a long time ³The Pa low vacuum; The 3rd, heat insulation, reduce thermal losses as far as possible.One annular groove of roll extrusion on the heat release pipe installs a snap ring additional in the annular groove, a packing ring made from heat-barrier material is placed in the snap ring outside, can prevent that pipe close from collapsing in pipe under the effect of negative pressure.During use, when solar radiation during to the solar water heater that constitutes by many solar energy bypass heat collector tube pipes, half garden arc solar panel absorbs solar radiant heat and conducts to the endothermic tube of bypass heat pipe, water class working medium in managing absorbs heat energy, seethes with excitement, vaporizes also ascension immediately to the heat release pipe with the temperature far below normal boiling point under vacuum state.Steam state working medium is conducted the latent heat of vaporization of carrying to water or other working medium outside the pipe through tube wall in the heat release pipe, is condensed into liquid state immediately, flows back into endothermic tube through bypass pipe again under the effect of gravity.--vapour--liquid phase becomes heat transfer to implement liquid so again and again, constantly solar radiation heat energy is passed to water to be heated or other working medium.

The utility model has the advantages that: the bypass heat pipe that adopts band bypass pipe structure: not only thermal capacity little, start soon, and can eliminate vapour lock effectively, implement gas-liquid and shunt mutually, can improve phase-change heat transfer efficient significantly, so thermal efficiency height; Vacuum is made in space in coaxial double-layer transparent vacuum glass tube and the pipe, can block convection heat transfer' heat-transfer by convection, so thermal losses is low; Employing is inserted into the bypass heat pipe in the glass tube with vacuum, the scheme that the mouth of pipe seals with pipe close, and simple in structure, so easy construction is with low cost; Again because drawbacks such as no foulings, bursting by freezing, booster, thus durable in use, can constitute various solar energy heat utilization devices in the uses of all kinds of areas.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing.

Accompanying drawing 1 is a structure diagram of the present utility model, and accompanying drawing 2 is the A-A cutaway view of Fig. 1.

The utility model solar energy bypass heat pipe is made up of parts such as bypass heat pipe 1, solar panel 5, glass tube with vacuum 7, pipe closes 15.Bypass heat pipe 1 is by three sections tubular containers that are welded into inner intercommunication such as heat release pipe 2, endothermic tube 3, bypass pipes 4.Three sections centerline are all selected the copper pipe manufacturing for use in same plane.In tubular container, pour into a certain amount of water class working medium and make P≤5 * 10 ^-2The Pa vacuum, the end with endothermic tube 3 flattens, seals, bends to arc and gets final product again.If in water, add an amount of additive, not only can prevent the copper pipe tube inner corrosion, and can make the high, medium and low warm pipe that is suitable for different serviceability temperatures.The Guan Jing of heat release pipe 2 is thicker, can place together the annular groove of snap ring 13 in its underpart roll extrusion, outer wall coating antirust coat, and the lower end is communicated with bypass pipe 4.Endothermic tube 3 upper bend become " L " font, and bent-up end is communicated with the flat segments of bypass pipe 4, and straight section reaches the bottom of glass tube with vacuum 7 and parallel with its axis; Bypass pipe 4 upper bend become " L " shape, and straight end is short to be communicated with heat release pipe 2 along axis, and bent-up end is connected on the flat segments of endothermic tube 3 crooked positions.The crooked position of endothermic tube 3 and bypass pipe 4 is interconnected to the logical quadrilateral structure of ring.Solar panel 5 usefulness copper coins are pressed into half garden arc, there is a groove that can coat heat release pipe 3 on the top of garden arc, be pressed into concavo-convex stick on the aerofoil of garden arc, not only can have gained in strength, but also can enlarge daylighting area, again at its outer surface coating magnetron sputtering coating for selective absorption 6.Described glass tube with vacuum 7 is coaxial double-layer transparent vacuum glass tubes of selecting for use silicon boron glass 3.3 materials to make.Inner glass tube one end seals into the garden arc, and by band getter support 8 supportings in the cover glass tube sealed-off end, the other end and cover glass tube one end sealing by fusing be opening circlewise, and its mezzanine space is made P≤5 * 10 ^-2The Pa vacuum.Inwall has getter precipitation membrane 9 in the cover glass tube bottom.During assembling, the bypass heat pipe 1 that will have half garden arc solar panel 5 is inserted in the glass tube with vacuum 7, and the mouth of pipe will be made P≤5 * 10 again with 15 sealings of silicon rubber pipe close in the pipe ³The Pa low vacuum.The packing ring made from heat-barrier material 14 can prevent that pipe close 15 from collapsing in pipe under the effect of negative pressure.Cushion pad 10 can be avoided the interior pipe of the end crushing glass tube with vacuum 7 of bypass heat pipe 1 effectively.Getter 11 can be eliminated the residual water vapor class gas in the pipe, makes to keep low vacuum in the pipe.Support 12 can make bypass heat pipe 1 and solar panel 5 positioning stablities.

During use, to tilt to place towards south southern or to the west by the solar water heater that many solar energy bypass heat pipes assemble, half garden arc solar panel 5 absorbs solar radiation heat energy and conducts to endothermic tube 3, water class working medium in the pipe is heated, and seethes with excitement, vaporizes with the temperature far below normal boiling point under vacuum state.The steam of gaseous state to heat release pipe 2, is condensed into aqueous water along inside pipe wall along endothermic tube 3 rapid ascensions, and water flows back into endothermic tube 3 again through bypass pipe 4 under the gravity effect.Meanwhile, the steam in the pipe conducts to water to be heated outside the pipe with gasification latent heat through the tube wall of heat release pipe 2.So liquid--gas--liquid phase change heat transfer is implemented on Zhou Erfu ground in the bypass heat pipe, and the solar radiation heat energy that constantly solar panel is absorbed passes to water to be heated, and it is stand-by that water is heated up.In like manner, also can heat other liquid, gas even solid kind working medium with the utility model.

Claims

1, solar energy bypass heat pipe, it comprises that parts such as bypass heat pipe 1, solar panel 5, coaxial double-layer transparent vacuum glass tube 7, pipe close 15 form, it is characterized in that bypass heat pipe 1 is encapsulated in the glass tube with vacuum 7, the mouth of pipe seals with pipe close 15, and the top of heat release pipe 2 is exposed to outside the pipe, and is in the geometric center position.

2, solar energy bypass heat pipe according to claim 1 is characterized in that described bypass heat pipe 1 has by the two the interconnective position of bent-up end of endothermic tube 3 and bypass pipe 4, constitutes the logical quadrangle of ring.

3, solar energy bypass heat pipe according to claim 1 and 2 is characterized in that the upper bend of endothermic tube 3 becomes " L " type, and its bent-up end is communicated with the flat segments of bypass pipe 4.

4, solar energy bypass heat pipe according to claim 1 and 2 is characterized in that the lower knuckle of bypass pipe 4 becomes " L " type, and its bent-up end is communicated with the flat segments of endothermic tube 3.

5, sun body bypass heat pipe according to claim 1 and 2 is characterized in that heat release pipe 2 and bypass pipe 4 connect as one along axis.

6, sun body bypass heat pipe according to claim 1 and 2 is characterized in that the flat segments of endothermic tube 3 coats garden arc solar panel 5.