CN103225908B - Working medium high-position gathering pressure-reduction heat collection component for protecting all-glass vacuum heat pipe from stagnation - Google Patents
Working medium high-position gathering pressure-reduction heat collection component for protecting all-glass vacuum heat pipe from stagnation Download PDFInfo
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- CN103225908B CN103225908B CN201310142563.XA CN201310142563A CN103225908B CN 103225908 B CN103225908 B CN 103225908B CN 201310142563 A CN201310142563 A CN 201310142563A CN 103225908 B CN103225908 B CN 103225908B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A working medium high-position gathering pressure-reduction heat collection component for protecting an all-glass vacuum heat pipe from stagnation comprises an all-glass vacuum heat pipe heat collection component and a stagnation protector, wherein the stagnation protector is formed through the transmission connection of a heating power driving device and a heat transfer straight cylinder, and is characterized in that the heat transfer straight cylinder is connected with the hot end of a heat pipe directly or through a heat sink by adopting a one-dimensional sliding pair at a low heat resistance; the shape of the outer end part of the heat transfer straight cylinder coincides with that of an inner surface of a tail end of a shield glass tube; the inner of the hot end of the heat pipe comprises a sparse core mesh formed by a plurality of slim capillary liquid absorbing cores 2-10 mm in width; the sparse core mesh is pressed and pasted on the inner wall of the hot end of the heat pipe by the adoption of an elastic clamp spring; and the area of the sparse core mesh is less than 5 % of that of the inner wall of the hot end of the heat pipe . According to the invention, the low power stagnation protector is adopted to ensure that the water vapor pressure inside the heat pipe is never larger than two times of the barometric pressure; and the sparse core mesh is arranged inside the heat pipe to shorten the starting time of the heat pipe to over 10 minutes from over 140 minutes of the original bare tube, so that the time of heat collection can be increased by 1 hour everyday in winter.
Description
Technical field
The present invention relates to a working medium high position and gather decompression empty sun protection all-glass vacuum heat collector tube element.
Background technology
Vacuum heat collection pipe arranges vacuum heat-insulating layer between its cover glass tube and inner glass tube, can manufacture the vacuum solar water heater that also can provide domestic hot-water winter.With the solar water heater of heat-pipe vacuum heat collecting pipe manufacture have more in pipe anhydrous Energy Efficiency Ratio high, meet safe drinking water standard, single tube and damage the advantage such as in the same old way work.Therefore.In pipe, anhydrous solar energy evacuated water-both with hot pipe will likely capture the increasing market share.
Adopt integrated glass heat pipe have can with cover glass tube melt envelope, glass heat pipe surface can directly make absorbing film heat transfer link few, can adopt the splendid water of thermophysical property to make the advantages such as working medium.
But when air drying, heat collecting element inside heat pipe temperature can reach 230 DEG C, saturated vapor pressure corresponding to this temperature is 28.53 atmospheric pressure, and corresponding working medium filling weight is that working medium volumetric ratio is 1.1% with the ratio of heat pipe volume, and every 1 liter capacity has 11 ml waters.
The pressure of inside heat pipe can reduce air drying by reducing working medium filling weight time, taking device of working medium as example: in the time that working medium filling weight/heat pipe plot ratio 0.5% during from 5 milliliters/1000 milliliters are reduced to 2 milliliters/1000 milliliters 0.2%, correspondingly its highest saturated vapor pressure is reduced to approximately 3.7 atmospheric pressure of 140 DEG C from approximately 10 atmospheric pressure of 180 DEG C, and inside heat pipe while continuing to be warming up to 180 DEG C from 140 DEG C approximately 3.7 atmospheric high-vapor-pressures internal pressure only have 4 atmospheric pressure left and right.But internal pressure when working medium filling weight can not be only with air drying sometimes decides.For working medium filling weight/heat pipe plot ratio be 0.2%, the heat pipe of 1000 milliliters of internal capacities, 2000 millimeters of length, if internal pressure is no more than 4 atmospheric pressure, approximately 1.8 milliliters of working medium filling weights when making 230 DEG C of air dryings.Even if problem is described heat pipe is light-pipe structure, in the time tilting approximately 45 degree work, the condensed water of cold junction, the circulating water in hot junction add that 0.353 milliliter of sum of the water yield of 85 DEG C of water vapours can far exceed 1.8 milliliters.
Make working medium filling weight/heat pipe plot ratio be greater than 0.2% even 0.3% in order to meet the normal work of heat pipe, and guarantee glass heat pipe not because air drying and bombing must be taked empty sun protection measure.
The anti-air drying all-glass vacuum of Chinese invention patent 2009101951003 heat collector tube element; disclose a kind of empty sun protection all-glass vacuum heat collector tube element; form by controlled heat transfer path being set between vacuum heat collection element absorber and cover glass-tube; controlled heat transfer path is made up of movable heat transfer piece and actuator, it is characterized in that containing the heating power transducing actuator being connected with vacuum heat collection element absorber low thermal resistance.Because this patent is not specially for gravity assisted heat pipe heat collecting element, thereby specific aim is not strong; The uniformity of the original product of bimetal leaf heating power transducing actuator that it adopts is just bad, after temperature distortion repeatedly, restorable ability can reduce again, operating point setting, control variables input, comparison, transducing and the Power supply that its control system of bearing is relevant and carry out function and far can not normally effectively work because precision is affected 20 year possible projected life of heat collecting element.
Fig. 4 provides the light-pipe structure gravity assisted heat pipe structural representation of a tiltably-mounted.
In Fig. 4, heat pipe 1 is made up of shell and internal working medium.Its operation principle is: heat energy is i.e. arrow marked position input inwards side by side from the hot junction of below, make the vaporization of being heated of the working medium at heat pipe 1 inner bottom place, steam is under the effect of pressure reduction, upwards advance to heat pipe cold junction and be arrow side by side outwards marked position emit heat energy and be supplied to and load and be condensed into the cold junction of liquid below being back under Action of Gravity Field, in the vaporization of being again heated of hot junction working medium ..., constantly circulation realizes two phase flow heat transfer circulation thus.Heat pipe has excellent heat-transfer capability, heat flow density ability to transform and isothermal characteristics.If 100 watts of heat pipe 1 hot junction inputs, its cold junction output is the highest can reach 97 watts even higher.
If attempt the heat pipe 1 of Fig. 4 only to input heat energy from below, and do not take heat energy away, heat pipe 1 steam inside is pressed and can sharply be risen.If heat pipe 1 adopts water as working medium and abundant,, in the time that heat pipe 1 temperature reaches 230 DEG C, inner maximum pressure can reach 28.53 atmospheric pressure.
If attempted the comprehensively heating take out heat energy from a section of whole heat pipe 1 length 3% of accounting for for example starting from bottom a little more than heat pipe 1 bottom local below from top to bottom of the heat pipe 1 of Fig. 4, only make position that bottom accounts for heat pipe 1 total length 3% forward simultaneously as overlapping cold junction, the vapour pressure of heat pipe 1 inside can drop to the saturated vapor pressure corresponding with the temperature of cold junction below.When for example water is as working medium, keep heat pipe 1 100 DEG C of the temperature of overlapping cold junction below, even if other parts are heated to 230 DEG C above, because the liquid refrigerant of heat pipe 1 inside is all collected in described overlapping cold junction, heat pipe 1 hot junction above except described overlapping cold junction is whole dry owing to not having working medium to supplement, and two phase flow heat transfer mechanism has not existed.The steam pressure of heat pipe 1 inside 1 atmospheric pressure of also only having an appointment.
An example of overlapping cold junction be thermotube wall with absorbing film, absorb sunshine input as heat energy, connect described thermotube wall with Thermal Conduction Equipment low thermal resistance simultaneously and heat energy shifted.
This make that heat pipe 1 is in tilted layout, heat energy is inputted above heat pipe 1 and only with below a bit of design as overlapping cold junction perhaps there is no what meaning in other occasions, but for the empty sun protection of solar collection element, because only need minimum a part of heat radiation power---when this part heat radiation power is used for guaranteeing that air drying occurs, the peak of the initial stage inside heat pipe vapour pressure that empty sun protection device starts to work is no more than setting value; This part heat radiation power is also greater than the heat energy input power of described overlapping cold junction as hot junction---thus have advantages of radiating element volume compact, dependable performance, heat radiation power little, on the venting of vacuum heat-insulating layer less, on absorber to block impact little and can utilize heat collecting element tail end as heat dissipation interface.
Can see, the needed heat radiation power of less, the described empty sun protection device of area of overlapping cold junction is also less, more favourable.Actual heat collecting element needs the device of tail box and so on to settle.Tail box can hide the tail end of heat collecting element.The part being hidden by tail box does not belong to overlapping cold junction.Why also can use overlapping cold junction; be because some heat collecting element empty sun protection device be relatively applicable to being installed on vacuum heat-insulating layer drum-shaped section or; heat collection element cover glass pipe is with necking segment and be to adopt after necking segment forms, to assemble inner glass tube, and then draws tail pipe to be called for short the technique of post-tensioning tail pipe to cover glass tube circle envelope.If the round end-blocking that post-tensioning tail pipe technique forms is not suitable for heat radiation, dispel the heat from described round end-blocking cover glass tube drum-shaped section up with regard to needing to utilize.The heat pipe corresponding with described drum-shaped section or inner glass tube end section belong to overlapping cold junction.
China's 912050845 utility model electric cooker automatic magnetic temperature detect switch (TDS)s, have introduced one and have utilized pyromagnetic force inverting element operation principle.
Summary of the invention
The object of the invention is to provide a working medium high position to gather decompression empty sun protection all-glass vacuum heat collector tube element.
The present invention solves the technical scheme that its technical problem is taked: with all-glass vacuum heat collector tube element and be placed in the empty sun protection device in described heat collecting element tail end vacuum heat-insulating layer, form a working medium high position and gather the empty sun protection all-glass vacuum heat collector tube element that reduces pressure.All-glass vacuum heat collector tube element is made with cover glass tube sealing-in integral type inner glass tube heat pipe.Described heat collecting element is vertical or tilt to install the work of described heat pipe dependence gravity.Described empty sun protection device passes hot linked thermodynamic-driven device by one with described heat pipe hot junction, is in transmission connection with thermodynamic-driven device or forms with the integrally manufactured heat straight-tube of thermodynamic-driven device.Described empty sun protection device has two kinds of stable states: heat straight-tube is stretched out the unlatching heat conduction state conducting heat while connecting cover glass tube tail end; The heat straight-tube adiabatci condition of closing of not conducting heat while connecting cover glass tube tail end of retracting.Described thermodynamic-driven device comprises temperature-sensitive permanent-magnet steel driving element.Temperature-sensitive permanent-magnet steel driving element comprises a temperature-sensitive permanent-magnet steel and a soft iron; Temperature-sensitive permanent-magnet steel is connected with described heat pipe hot junction low thermal resistance by a thermal conductance; Soft iron is tied and can moves forward and backward and be in transmission connection by transmission steel wire and heat straight-tube along heat collecting element direction of axis line.
Heat straight-tube adopts one-dimensional movement auxiliary structure low thermal resistance to be connected with bottom place, described heat pipe hot junction; Or heat straight-tube adopts one-dimensional movement auxiliary structure low thermal resistance to be connected with a heat sink, and described heat sink is connected with bottom place, described heat pipe hot junction low thermal resistance.Heat straight-tube can move forward and backward along heat collecting element direction of axis line.The outer end shape of heat straight-tube and cover glass tube tail end inner surface match.A sparse core net being made up of the slice capillary wick of 2 to 10 millimeters of some width is set in inside, described heat pipe hot junction, and sparse core net adopts elastic circlip to overlay in heat pipe hot junction inwall; The area of sparse core net is less than 5% of described heat pipe hot junction inner wall area.
Can also make described cover glass tube tail end inner surface low thermal resistance connect a heat radiation paster; The heat transfer state of heat radiation paster and heat straight-tube changes according to the state of thermodynamic-driven device.
The annular fillet capillary wick according to circumferential layout forms by several can also to make described sparse core net.
Can also make between heat radiation paster and heat sink, or cover glass tube tail end inner side is connected by a high thermal resistance of jump ring with bottom place, heat pipe hot junction.
Can also make outside 700 ± 50 watts/square metre of sunshine exposures, described heat pipe cold junction 40 ± 5 DEG C of water temperatures, heat collecting element axial line be that north-south is in tilted layout and the angle of its axial line and incident sunlight within the scope of 90 ± 20 ° under condition, sparse core net hold liquid refrigerant quality≤its maximum liquid refrigerant volume of holding 25%.
Can also make: the maximum liquid refrigerant of the described sparse core net volume of holding >=4 milliliter; Outside 700 ± 50 watts/square metre of sunshine exposures, described heat pipe cold junction 40 ± 5 DEG C of water temperatures, heat collecting element axial line be that north-south is in tilted layout and the angle of its axial line and incident sunlight within the scope of 90 ± 20 ° under condition, described sparse core net is held quality≤0.9 milliliter of liquid refrigerant.
Can also make described heat collecting element tail end is the part that is no more than heat collecting element total length 6% from heat collecting element tail end bottom outer surface forward.
Beneficial effect of the present invention: a working medium high position of the present invention gather decompression empty sun protection all-glass vacuum heat collector tube element adopt dispel the heat at heat pipe bottom place to collect liquid refrigerant in bottom place, heat pipe hot junction, the empty sun protection design of blocking-up inside heat pipe two phase flow heat transfer, heat radiation power can reduce greatly.For example: export the heat collecting element of 70 watts, 3 milliliters of working medium filling weights for one.Adopt the technical scheme of dispelling the heat to prevent heat pipe bombing at the uniform controlled heat transfer path of heat pipe hot end surface, the heat radiation power of controlled heat transfer path is 40 watts, inside heat pipe temperature also has more than 150 DEG C, and corresponding water vapor pressure still can reach the voltage endurance capability that 4.8 atmospheric pressure exceed 58 millimeters of external diameters, 1.8 millimeters of inner glass tubes of wall thickness.The present invention is for the heat collecting element of 70 watts of same outputs, and decompression empty sun protection heat transfer path only needs 10 watts of heat radiation powers, just can in the time that air drying occurs, carry out the water of heat absorbing glass inside heat pipe with the speed of 0.25 ml/min.Air drying started after approximately 6 minutes, although the heat pipe surperficial temperature that faces south raises approximately 30 DEG C at that time, heat pipe hot junction inner except bottom place all dry, vapour pressure be less than 1.5 atmospheric pressure.The heat radiation power of saving 30 watts makes cost have larger reduction, reduces heat transfer path venting 75% and the reliability of vacuum heat-insulating layer are increased substantially.Key is the bombing problem that can effectively solve major diameter heat pipe.The present invention adopts a small-power empty sun protection device just can ensure that inside heat pipe water vapor pressure is no more than 2 atmospheric pressure all the time, and does not affect the normal work of heat collecting element completely.
Heat straight-tube heat transfer area is large, rigidity is strong, utilize heat collecting element bottom build heat transfer path few to the absorption resource occupation of heat collecting element, and be applicable to the empty sun protection of heat collecting element heat pipe hot junction from the distant metal heat pipe of cover glass tube straight section, interior glass finned plate pipe and eccentric heat pipe.
Embedded straight tube vacuum heat-pipe heat collecting element decompression empty sun protection device adopts two temperature-sensitive permanent-magnet steel driving elements uniform; minimumly can replace original four paws jump ring with a wire circlip; increase again two blocks of temperature-sensitive permanent-magnet steels, two blocks of soft irons, two springs, two transmission steel wires, temperature-sensitive permanent-magnet steel thermal conductance, 10 parts of a heat straight-tube with shading, and connect described parts by the high thermal resistance of wire circlip.Simple for structure, easy to assembly.
Temperature-sensitive permanent-magnet steel driving element high conformity, reproducible, control accuracy is high, long service life, performance are satisfactory.
Adopt the sparse core net being formed according to the annular fillet capillary wick of circumferential layout by several at inside heat pipe, make the heat pipe start-up time of more than 140 minute from original light pipe, foreshorten to more than 10 minute, be equivalent to many thermal-arrests more than hour every day in winter.Thereby both having accelerated to greatest extent heat pipe starts; When increasing hardly again working medium filling weight and making air drying, the pressure of glass heat pipe inside keeps low level.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is that a working medium high position is gathered decompression empty sun protection all-glass vacuum heat collector tube element and faced structural representation.
Fig. 2 is that a working medium high position is gathered TV structure schematic diagram on decompression empty sun protection all-glass vacuum heat collector tube element.
Fig. 3 is that Fig. 1 looks sectional structure schematic diagram on the left side at heat straight-tube 7 places.
Fig. 4 is the light-pipe structure gravity assisted heat pipe structural representation of a tiltably-mounted.
Fig. 5 is the expanded view of a slice heat straight-tube.
Fig. 6 is an all-glass vacuum solar energy collection tube structural representation.
1. heat pipes in figure; 2. cover glass tube; 3. inner glass tube; 4. heat radiation paster; 5. heat sink; 6. temperature-sensitive permanent-magnet steel driving element; 7. heat straight-tube; 8. temperature-sensitive permanent-magnet steel; 9. soft iron; 10. thermal conductance; 11. shadow shields; 12. plate washers; 13. transmission steel wires; 14. springs; 15. connecting plates; 16. four paws jump rings; 17. square holes; 18. breach; 19. annular fillet capillary wick; 20. annular springs.
Detailed description of the invention
Fig. 1, Fig. 2 and Fig. 3 provide one embodiment of the invention.
In Fig. 1 to 3; in vacuum heat-insulating layer between all-glass vacuum solar energy collection tube cover glass tube 2 tail ends and heat pipe 1 tail end; an embedded straight tube vacuum heat-pipe heat collecting element decompression empty sun protection device is set, forms a decompression empty sun protection all-glass vacuum heat collector tube element.Empty sun protection device is made up of the paster 4 that dispels the heat, heat sink 5, temperature-sensitive permanent-magnet steel driving element 6 and heat straight-tube 7.The shape of heat radiation paster 4 outer surfaces and the shape of cover glass tube 2 tail end inner surfaces match.0.22 millimeter of heat radiation paster 4 thickness, 40 millimeters of width.Heat radiation paster 4 use jump rings overlay in cover glass tube 2 inwalls.0.22 millimeter of heat sink 5 thickness, 40 millimeters of width.Temperature-sensitive permanent-magnet steel driving element 6 comprises a temperature-sensitive permanent-magnet steel 8 and a soft iron 9; Temperature-sensitive permanent-magnet steel 8 is connected with inner glass tube 3 low thermal resistances by thermal conductance 10; Temperature-sensitive permanent-magnet steel 8 is provided with shadow shield 11 above, prevents that sunshine direct projection from making its misoperation at the temperature-sensitive permanent-magnet steel 8 in vacuum heat-insulating layer.Soft iron 9 is subject to plate washer 12 constraints in both sides to move forward and backward and to be in transmission connection by transmission steel wire 13 and heat straight-tube 7 along heat collecting element direction of axis line, and soft iron 9 is subject to spring 14 thrust to pushed away from permanent-magnet steel 8 or has the trend that pushed away from permanent-magnet steel 8.0.22 millimeter of heat straight-tube 7 thickness, 40 millimeters of width.Between heat straight-tube 7 and heat sink 5, adopt one-dimensional movement auxiliary structure low thermal resistance to be connected, heat straight-tube 7 can be stretched out to retract along heat collecting element direction of axis line and be moved forward and backward.Heat sink 5 is wrapped up low thermal resistance and is connected heat pipe 1 bottom, hot junction place and overlay on inner glass tube 3 with jump ring.The outer end shape of heat straight-tube 7 matches with heat radiation paster 4 inner surfaces.0.22 millimeter of thermal conductance 10 thickness, 20 millimeters of width, be rolled into tubular.Thermal conductance 10 is connected by the high thermal resistance of a slice connecting plate 15 rigidity with heat sink 5.Between cover glass tube 2 tail end inner sides and inner glass tube 3 tail ends, be connected the location (four paws jump ring, for for purpose of brevity, does not draw in Fig. 1,2, but illustrates with Fig. 6 specially) of realizing between cover glass tube 2 and inner glass tube 3 by the high thermal resistance of four paws jump ring 16.
Several annular fillet capillary wick 19 according to circumferential layout are set in heat pipe 1 inside, hot junction and form a sparse core net.Annular fillet capillary wick 19 use annular springs 20 overlay in heat pipe 1 hot junction inwall.1 meter 8 of the hot end length of heat pipe 1; 5 millimeters of the width of annular fillet capillary wick 19.The area sum of annular fillet capillary wick 19 is less than 2.8% of described heat pipe 1 hot junction inner wall area.
The making material of heat radiation paster 4, heat sink 5, heat straight-tube 7 comprises steel plate, aluminium sheet and copper coin.
The operation principle of Fig. 1 to 3 embodiment: the heat collecting element that described decompression empty sun protection device is installed when embedding is normally in tilted layout and during not in air drying state; temperature-sensitive permanent-magnet steel 8 temperature that are connected with inner glass tube 3 low thermal resistances by thermal conductance 10 do not reach loss of excitation temperature; temperature-sensitive permanent-magnet steel 8 hold soft iron 9 by heat straight-tube 7 toward Zola; make heat straight-tube not contact heat radiation paster, empty sun protection device is in closing adiabatci condition.The normal thermal-arrest of heat collecting element.Marginal position when dotted line represents that heat straight-tube 7 is retracted in figure.
When heat collecting element is during in air drying state, temperature-sensitive permanent-magnet steel 8 temperature rising magnetic force disappear, and spring 14 is pushed soft iron 9 and heat straight-tube 7 to the right side, heat straight-tube 7 are stretched out conduct heat to connect heat radiation paster 4, and empty sun protection device is in opening heat conduction state.Inner glass tube 3 is that the heat energy in heat pipe 1 hot junction is lost to environment continually by empty sun protection device.The steam of heat pipe 1 inside flows to bottom place and condenses and be collected in bottom place under differential pressure action, clamps down on heat pipe 1 internal pressure all the time in low level, ensures that heat collecting element can bombing do not realize the empty sun protection of heat collecting element.Due to the constraint of plate washer 12, maximum 2 millimeters of the distance that soft iron 9 moves right, can attract soft iron 9 to return when after can ensureing like this, temperature-sensitive permanent-magnet steel 8 magnetic force recover once again.
Later heat collecting element departs from air drying state, and temperature-sensitive permanent-magnet steel 8 temperature reduce magnetic force to be recovered and attract soft iron 9 that heat straight-tube 7 is retracted not conduct heat to connect the paster 4 that dispels the heat, and empty sun protection device is in closing adiabatci condition, and heat collecting element can normally be worked again.
When heat pipe 1 normal work, allow annular fillet capillary wick 21 dry or partly dry, so annular fillet capillary wick 19 is not usually held working medium in the time that heat pipe 1 is worked.When heat pipe 1 normal end-of-job, the condensate water evaporation of heat pipe 1 cold junction inner surface, whole or the most working medium of all working medium including this part working medium is by annular fillet capillary wick 19 stickings, improves former light pipe heat pipe and be collected in the working medium position of heat pipe 1 bottom.When the annular fillet capillary wick 19 that is distributed in whole heat pipe 1 hot junction is conducive to heat pipe 1 and starts, annular fillet capillary wick 19 places absorb solar thermal energy as much as possible and accelerate to start.
Fig. 1 to 3 embodiment, for the all-glass vacuum heat collector tube element of cover glass tube diameter 70, inner glass tube diameter 58, does not adopt heat radiation paster and heat sink, and the heat radiation power of described empty sun protection device also can reach more than 10 watts.
Change Fig. 1 into bimetal leaf thermodynamic-driven device with the temperature-sensitive permanent-magnet steel driving element 6 in Fig. 2 or change memory alloy actuator part into or change into and when bellows driving element also can be realized air drying, make heat straight-tube 7 stretch out to conduct heat to be connected, working medium being locked in to heat pipe 1 bottom, hot junction place and realizing the empty sun protection mechanism of heat pipe 1 inner pressure relief.
Fig. 5 provides the expanded view of heat straight-tube 7.
In Fig. 5, heat straight-tube 7 is unfolded.Its square hole 17 is established for avoiding four paws jump ring.Breach 18 is established for being processed into the shape matching with cover glass tube tail end medial surface.
Fig. 6 provides the structural representation of an all-glass vacuum thermal-collecting tube.
In Fig. 6, arrange sealing-in by cover glass tube 2 and inner glass tube 3 nested, concentric, make an all-glass vacuum heat collector tube element.Inner glass tube 3 from sealing-in place stretch out forward and inner vacuum pumping loading working medium after sealed-off make a heat pipe 1, the length in heat pipe 1 hot junction is 1.8 meters.The outer surface of inner glass tube 3 is made absorbing film.Four paws jump ring 16 is arranged between cover glass tube 2 tail ends and inner glass tube 3 tail ends.
Claims (7)
1. a working medium high position is gathered decompression empty sun protection all-glass vacuum heat collector tube element, formed by all-glass vacuum heat collector tube element and the empty sun protection device being placed in described heat collecting element tail end vacuum heat-insulating layer, all-glass vacuum heat collector tube element is made with cover glass tube sealing-in integral type inner glass tube heat pipe, described heat collecting element is vertical or tilt to install, described heat pipe relies on gravity work, described empty sun protection device passes hot linked thermodynamic-driven device by one with described heat pipe hot junction, be in transmission connection with thermodynamic-driven device or the heat straight-tube composition integrally manufactured with thermodynamic-driven device, described empty sun protection device has two kinds of stable states: heat straight-tube is stretched out the unlatching heat conduction state conducting heat while connecting cover glass tube tail end, the heat straight-tube adiabatci condition of closing of not conducting heat while connecting cover glass tube tail end of retracting, is characterized in that described thermodynamic-driven device comprises temperature-sensitive permanent-magnet steel driving element, and temperature-sensitive permanent-magnet steel driving element comprises a temperature-sensitive permanent-magnet steel and a soft iron, temperature-sensitive permanent-magnet steel is connected with described heat pipe hot junction low thermal resistance by a thermal conductance, soft iron is tied and can moves forward and backward and be in transmission connection by transmission steel wire and heat straight-tube along heat collecting element direction of axis line, heat straight-tube adopts one-dimensional movement auxiliary structure low thermal resistance to be connected with bottom place, described heat pipe hot junction, or heat straight-tube adopts one-dimensional movement auxiliary structure low thermal resistance to be connected with a heat sink, and described heat sink is connected with bottom place, described heat pipe hot junction low thermal resistance, heat straight-tube can move forward and backward along heat collecting element direction of axis line, the outer end shape of heat straight-tube and cover glass tube tail end inner surface match, contain a sparse core net being made up of the slice capillary wick of 2 to 10 millimeters of some width in inside, described heat pipe hot junction, sparse core net adopts elastic circlip to overlay in heat pipe hot junction inwall, the area of sparse core net is less than 5% of described heat pipe hot junction inner wall area.
2. according to heat collecting element claimed in claim 1, it is characterized in that described cover glass tube tail end inner surface low thermal resistance connects a heat radiation paster; The heat transfer state of heat radiation paster and heat straight-tube changes according to the state of thermodynamic-driven device.
3. according to heat collecting element claimed in claim 1, it is characterized in that the annular fillet capillary wick according to circumferential layout forms described sparse core net by several.
4. according to heat collecting element claimed in claim 2, it is characterized in that dispelling the heat between paster and heat sink, or cover glass tube tail end inner side is connected by a high thermal resistance of jump ring with bottom place, heat pipe hot junction.
5. according to the heat collecting element described in claim 1 or 2, it is characterized in that outside 700 ± 50 watts/square metre of sunshine exposures, described heat pipe cold junction that 40 ± 5 DEG C of water temperatures, heat collecting element axial line are that north-south is in tilted layout and the angle of its axial line and incident sunlight within the scope of 90 ± 20 ° under condition, sparse core net hold liquid refrigerant quality≤its maximum liquid refrigerant volume of holding 25%.
6. according to the heat collecting element described in claim 1 or 2, it is characterized in that: the maximum liquid refrigerant of the described sparse core net volume of holding >=4 milliliter; Outside 700 ± 50 watts/square metre of sunshine exposures, described heat pipe cold junction 40 ± 5 DEG C of water temperatures, heat collecting element axial line be that north-south is in tilted layout and the angle of its axial line and incident sunlight within the scope of 90 ± 20 ° under condition, described sparse core net is held quality≤0.9 milliliter of liquid refrigerant.
7. according to the heat collecting element described in claim 1 or 2, it is characterized in that described heat collecting element tail end is the part that is no more than heat collecting element total length 6% from heat collecting element tail end bottom outer surface forward.
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| CN201310142563.XA CN103225908B (en) | 2013-04-22 | 2013-04-22 | Working medium high-position gathering pressure-reduction heat collection component for protecting all-glass vacuum heat pipe from stagnation |
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| CN201310142563.XA CN103225908B (en) | 2013-04-22 | 2013-04-22 | Working medium high-position gathering pressure-reduction heat collection component for protecting all-glass vacuum heat pipe from stagnation |
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|---|---|---|---|---|
| WO1981001044A1 (en) * | 1979-10-09 | 1981-04-16 | S Yard | Sealing-and venting device for a solar collector |
| CN2527924Y (en) * | 2002-02-25 | 2002-12-25 | 杨雄声 | All glass solar vacuum heat-collecting tube with heat-conducting strip |
| CN203240771U (en) * | 2013-04-22 | 2013-10-16 | 海宁伊满阁太阳能科技有限公司 | Working medium high-position gathering pressure-reduction idle-sunning protection full-glass vacuum heat tube heat collection element |
-
2013
- 2013-04-22 CN CN201310142563.XA patent/CN103225908B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981001044A1 (en) * | 1979-10-09 | 1981-04-16 | S Yard | Sealing-and venting device for a solar collector |
| CN2527924Y (en) * | 2002-02-25 | 2002-12-25 | 杨雄声 | All glass solar vacuum heat-collecting tube with heat-conducting strip |
| CN203240771U (en) * | 2013-04-22 | 2013-10-16 | 海宁伊满阁太阳能科技有限公司 | Working medium high-position gathering pressure-reduction idle-sunning protection full-glass vacuum heat tube heat collection element |
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|---|---|
| CN103225908A (en) | 2013-07-31 |
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