CN103225904A - Embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector - Google Patents
Embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector Download PDFInfo
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- CN103225904A CN103225904A CN2013101417544A CN201310141754A CN103225904A CN 103225904 A CN103225904 A CN 103225904A CN 2013101417544 A CN2013101417544 A CN 2013101417544A CN 201310141754 A CN201310141754 A CN 201310141754A CN 103225904 A CN103225904 A CN 103225904A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Abstract
An embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector is formed by controllable heat transfer channels arranged at the tail end of a vacuum heat collection element in a vacuum heat insulation layer, and each controllable heat transfer channel is formed by thermal sensitive permanent magnet steel, soft iron hot fins, transmission levels and connecting clamping springs. The embedded level vacuum heat pipe heat collection element pressure reduction stagnation protector is characterized in that the fixed sides of the soft iron hot fins are in low thermal resistance connection with the bottoms of the hot ends of hot pipes; the transmission levels are located above the thermal sensitive permanent magnetic steel and the free ends of the transmission levels are inserted below the movable sides of the soft iron hot fins; when the thermal sensitive permanent magnetic steel is magnetic, the transmission levels are attracted by the thermal sensitive permanent magnetic steel to lower and enable the movable sides of the soft iron hot fins to bend downwards and be in heat insulated connection with cover glass tubes; and when the thermal sensitive permanent magnetic steel is not magnetic, under the action of the own elastic force, the transmission levels are lifted to raise the movable sides of the soft iron hot fins to be in heating transfer connection with the cover glass tube, so as to achieve stagnation protection. According to the invention, only the low-power stagnation protector can ensure that pressure of the interiors of the hot pipes is not greater than double atmospheric pressure always, and cannot affect heat collection.
Description
Technical field
The present invention relates to embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector.
Background technology
Vacuum heat collection pipe sets vacuum heat-insulating layer between its cover glass tube and inner glass tube, can manufacture winter and can also provide the vacuum solar water heater of domestic hot-water.The solar water heater manufactured with heat-pipe vacuum heat collecting pipe is with more in the same old way anhydrous Energy Efficiency Ratio is high in pipe, meet safe drinking water standard, single tube damages the advantages of working.Therefore.Anhydrous solar energy evacuated water-both with hot pipe would be possible to capture the increasing market share in pipe.
Having the advantages that with cover glass tube can to melt envelope, glass heat pipe surface using integrated glass heat pipe can directly make that absorbing film heat transfer link is few, can make working medium using the splendid water of thermophysical property.
But during air drying, heat collecting element inside heat pipe temperature is up to 230 DEG C, and the corresponding saturated vapor pressure of this temperature is 28.53 atmospheric pressure, and the ratio between corresponding working medium filling weight and heat pipe volume i.e. working medium volumetric ratio are 1.1%, i.e., every 1 liter capacity has 11 milliliters of water.
The pressure of inside heat pipe when can reduce air drying by reducing working medium filling weight, by taking device of working medium as an example：0.5% when working medium filling weight/heat pipe volume rate is from 5 milliliters/1000 milliliters when being reduced to 2 milliliters/1000 milliliters 0.2%, correspondingly its highest saturated vapor pressure is reduced to 140 DEG C of about 3.7 atmospheric pressure from 180 DEG C of about 10 atmospheric pressure, and the highest vapour pressures of inside heat pipe from 140 DEG C of about 3.7 atmospheric pressure when being continuously heating to 180 DEG C internal pressure only have 4 atm highers.But working medium filling weight can not be determined only with internal pressure during air drying sometimes.For a working medium filling weight/heat pipe volume rate be 0.2%, 1000 milliliters of internal capacity, 2000 millimeters of length heat pipe, if in order that no more than 4 atmospheric pressure of internal pressure, about 1.8 milliliters of working medium filling weight during 230 DEG C of air drying.Even if it is light-pipe structure that problem, which is the heat pipe, when tilting about 45 degree of work, the condensed water of cold end, the circulating water in hot junction can exceed well over 1.8 milliliters plus 0.353 milliliter of sum of water of 85 DEG C of water vapours.
Working medium filling weight/heat pipe volume rate is more than 0.2% or even 0.3% to meet heat pipe normal work, and ensure the glass heat pipe not bombing because of air drying, it is necessary to take empty sun protection measure.
The anti-air drying all-glass vacuum heat collector tube element of Chinese invention patent 2009101951003; disclose a kind of empty sun protection all-glass vacuum heat collector tube element; by setting controllable heat transfer path to constitute between vacuum heat collection element absorber and cover glass-tube; controllable heat transfer path is made up of movable heat transfer piece and actuator, it is characterised in that contain the heating power transducing actuator being connected with vacuum heat collection element absorber low thermal resistance.Because this patent is not specific to gravity assisted heat pipe heat collecting element, thus specific aim is not strong；The uniformity of its original product of bimetal leaf heating power transducing actuator used is just bad, restorable ability can be reduced again after multiple temperature distortion, and the related operating point setting of its control system undertaken, control variable inputs, compared, transducing and energy supply and perform function are because precision is affected and is effectively worked to heat collecting element possible 20 year projected life far from normal.
Fig. 2 provides the light-pipe structure gravity assisted heat pipe structural representation of a tiltably-mounted.
In Fig. 2, heat pipe 1 is made up of shell and internal working medium.Its operation principle is：The hot junction of heat energy from below is to be inputted at arrows side by side inwards, make the heated vaporization of the working medium at the inner bottom of heat pipe 1, steam is in the presence of pressure difference, traveling up to heat pipe cold end i.e. arrow, outside marked position releases heat energy and is supplied to load and is condensed into liquid and is back to following cold end under gravity side by side, in hot junction, working medium is heated vaporizes again ..., and thus constantly circulation realizes that two phase flow heat transfer is circulated.Heat pipe has excellent heat-transfer capability, heat flow density ability to transform and isothermal characteristicses.If the hot junction of heat pipe 1 inputs 100 watts, its cold end output highest can reach 97 watts of even more highs.
If attempted to Fig. 2 heat pipe 1 only from following input heat energy, without taking heat energy away, then the steam inside pressure of heat pipe 1 can steeply rise.If heat pipe 1 is using water as working medium and enough, when the temperature of heat pipe 1 reaches 230 DEG C, internal maximum pressure is up to 28.53 atmospheric pressure.
If attempting to heat Fig. 2 heat pipe 1 comprehensively from top to bottom and one section that accounts for the whole length 3% of the heat pipe 1 taking-up heat energy from the following place for being slightly above the bottom of heat pipe 1 for example since bottom, bottom is only made to account for the position of the total length 3% of heat pipe 1 forward simultaneously as overlapping cold end, then the vapour pressure inside heat pipe 1 can drop to the saturated vapor pressure corresponding with the temperature of following cold end.During for example with water as working medium, keep 100 DEG C of the temperature of overlapping cold end below heat pipe 1, even if then other parts are heated to 230 DEG C above, because the liquid refrigerant inside heat pipe 1 is all collected in the overlapping cold end, the hot junction of heat pipe 1 above in addition to the overlapping cold end is dried up because no working medium supplement is whole, and two phase flow heat transfer mechanism has not existed.Steam pressure inside heat pipe 1 also only has about 1 atmospheric pressure.
One example of overlapping cold end is that thermotube wall carries absorbing film, absorbs sunshine and is inputted as heat energy, while connecting the thermotube wall and by heat energy transfer with Thermal Conduction Equipment low thermal resistance.
It is this make heat pipe 1 be in tilted layout, heat energy inputted above heat pipe 1 and only with the following a bit of design as overlapping cold end in other occasions perhaps without what meaning; but for the empty sun protection of solar collection element; because only needing to minimum a part of heat radiation power --- this part heat radiation power be used for ensure air drying occur when, empty sun protection device function to initial stage inside heat pipe vapour pressure peak be no more than setting value；This part heat radiation power is also greater than heat energy input power of the overlapping cold end as hot junction --- thus have the advantages that radiating element volume compact, dependable performance, heat radiation power it is small, on vacuum heat-insulating layer deflation less, on absorber block influence it is small and using heat collecting element tail end as heat dissipation interface.
It can be seen that, the area of overlapping cold end is smaller, the heat radiation power required for the empty sun protection device is also smaller, more favourable.Actual heat collecting element needs the device of tail box etc to be disposed.Tail box can cover the tail end of heat collecting element.The part covered by tail box is all not belonging to overlapping cold end.Why overlapping cold end can also be used; be because some heat collecting element empty sun protection devices be relatively adapted for mount to vacuum heat-insulating layer drum-shaped section or; heat collection element cover glass pipe, which carries necking segment and is utilized in after necking segment is formed, assembles inner glass tube, then justifies the technique that envelope draws tail pipe abbreviation post-tensioning tail pipe to cover glass tube again.The circle end-blocking of post-tensioning tail pipe technique formation is if not suitable for for radiating, it is necessary to radiated using the cover glass tube drum-shaped section from the circle end-blocking up.The heat pipe or inner glass tube end section corresponding with the drum-shaped section belongs to overlapping cold end.
Overlapping cold end is that, based on the decompression empty sun protection design for blocking the circulation of heat pipe two phase flow heat transfer, this is the non-decompression empty sun protection design controllable heat dissipation passage essential distinction with the anti-air drying all-glass vacuum heat collector tube element of above-mentioned Chinese invention patent 2009101951003.
Chinese 912050845 utility model electric cooker automatic magnetic temperature detect switch (TDS)s, describe one kind and utilize pyromagnetic force inverting element operation principle.
The content of the invention
The invention aims to provide embedded hot wing vacuum thermal pipe heat collection element pressure reduction stagnation protector.
The present invention solves the technical scheme that its technical problem is taken：With several the controllable heat transfer paths being arranged in the vacuum heat-insulating layer of vacuum heat-pipe heat collecting element tail end, an embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector is constituted.The controllable heat transfer path is made up of thermal sensitive permanent magnetic steel, the hot wing of soft iron, transmission levers and connection circlip.The controllable heat transfer path has two kinds of stable states：Transmission levers rise the unlatching heat conduction state that the promotion hot wing active edges of soft iron raise up when conducting heat connection cover glass tube；Transmission levers, which decline, causes the curved closing adiabatci condition do not conducted heat when connecting cover glass tube under the hot wing active edges of soft iron.The fixed edge low thermal resistance connection inner glass tube tail end or heat pipe hot junction bottom end of the hot wing of soft iron.The stage casing of transmission levers is in its free end above thermal sensitive permanent magnetic steel and put in below the active edges of the hot wing of soft iron.When thermal sensitive permanent magnetic steel has magnetic, transmission levers attract to decline by thermal sensitive permanent magnetic steel causes the curved connection cover glass tube that do not conduct heat under the hot wing active edges of soft iron；When thermal sensitive permanent magnetic steel loss of excitation, transmission levers by natural resiliency power effect rise promote the hot wing active edges of soft iron raise up heat transfer connection cover glass tube.
The cover glass tube tail end inner surface contacted with the hot wing active edges of the soft iron can also be made to post one layer of radiating paster, the radiating paster is connected with the laminating of cover glass tube tail end and low thermal resistance.Radiating paster and the heat transfer conditions of the hot wing active edges of the soft iron change according to the state change of thermal sensitive permanent magnetic steel.
The hot wing of the soft iron can also be made by a piece of heat sink and inner glass tube or the heat exchange of heat pipe hot junction or, the hot wing of soft iron and heat sink integral production；The heat sink is connected with inner glass tube or heat pipe hot junction low thermal resistance.
Thermal sensitive permanent magnetic steel can also be made to be connected by a piece of thermal conductivity with inner glass tube low thermal resistance；The hot wing of soft iron by heat sink punching flange integral production form；Being made in the heat sink and thermal conductivity has square connection circlip fitting recess.
It can also make and connect thermal conductivity, heat sink, transmission levers and radiating paster with a connection circlip；The thermal conductivity low thermal resistance connects thermal sensitive permanent magnetic steel；The heat sink and the hot wing integral production of soft iron.
Heat sink and thermal conductivity are used to improve the heat conductivility on glass heat pipe surface.Radiating paster is used to improve the heat transfer property of cover glass tube.
Beneficial effects of the present invention：The embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector of the present invention connects inner glass tube tail end or heat pipe hot junction bottom end using the fixed edge low thermal resistance of the hot wing of soft iron; designed when heat collecting element is in air drying state by opening controllable heat transfer path radiating to collect liquid refrigerant in the empty sun protection of heat pipe hot junction bottom end, blocking inside heat pipe two phase flow heat transfer, heat radiation power can be greatly reduced.Citing：The heat collecting element of one 70 watts of output, 3 milliliters of working medium filling weight.The technical scheme of heat pipe bombing is prevented using being radiated in the uniform controllable heat transfer path of heat pipe hot end surface, the heat radiation power of controllable heat transfer path is 40 watts, inside heat pipe temperature highest also has more than 150 DEG C, and corresponding water vapor pressure is still up to 4.8 atmospheric pressure beyond 58 millimeters of external diameter, the voltage endurance capability of 1.8 millimeters of inner glass tubes of wall thickness.The present invention is for the heat collecting element of same 70 watts of output, and depressurizing empty sun protection heat transfer path only needs 10 watts of heat radiation powers, it is possible to carry out the water of heat absorbing glass inside heat pipe with the speed of 0.25 ml/min when air drying occurs.Air drying started after about 6 minutes, although the face south temperature on surface of heat pipe raises about 30 DEG C at that time, had all dried up except bottom end inside heat pipe hot junction, already less than 1.5 atmospheric pressure of vapour pressure.Saving 30 watts of heat radiation power makes the cost have larger reduction, reduces deflation 75% and reliability of the heat transfer path to vacuum heat-insulating layer and increases substantially.Key is effectively to solve the problems, such as the bombing of major diameter heat pipe.The present invention ensures that inside heat pipe water vapor pressure no more than 2 atmospheric pressure, and do not influence the normal work of heat collecting element completely all the time using a small-power empty sun protection device.
Thermal sensitive permanent magnetic steel driving element uniformity is good, reproducible, control accuracy is high, long service life, performance are satisfactory.
Its free end above thermal sensitive permanent magnetic steel is in using the stage casing of transmission levers to put in below the active edges of the hot wing of soft iron.So that the distance between thermal sensitive permanent magnetic steel and the hot wing of soft iron can be elongated so that at the hot wing of soft iron interference of the temperature drop to thermal sensitive permanent magnetic steel be reduced to it is sufficiently small.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the composite construction schematic diagram that embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector is set in vacuum heat-insulating layer.
Fig. 2 is the light-pipe structure gravity assisted heat pipe structural representation of a tiltably-mounted.
1. heat pipe in figure；2. cover glass tube；3. inner glass tube；4. thermal sensitive permanent magnetic steel；5. the hot wing of soft iron；6. transmission levers；7. heat sink；8. active edges；9. fixed edge；10. free end；11. thermal conductivity；12. radiate paster.
Embodiment
Fig. 1 provides one embodiment of the invention.
In Fig. 1, in vacuum heat-pipe heat collecting element tail end cover glass tube 2 and inner glass tube 3 are the vacuum heat-insulating layer between heat pipe 1, two controllable heat transfer paths being made up of thermal sensitive permanent magnetic steel 4, the hot wing 5 of soft iron, transmission levers 6 and connection circlip are set.The hot wing 5 of soft iron by heat sink 7 punching flange form, its active edges 8 is more shorter than fixed edge 9.Also being made in heat sink 7 has square connection circlip fitting recess with convenient for assembly.Heat sink 7 is rolled into the tubular parcel low thermal resistance connection inner glass tube 3 tail end i.e. hot junction bottom end of heat pipe 1 with sheet iron.The one end of transmission levers 6 is fixed, and its stage casing is in the top of thermal sensitive permanent magnetic steel 4, and its other end free end 10 puts in the lower section of active edges 8 of the hot wing 5 of soft iron.Thermal sensitive permanent magnetic steel 4 is arranged at the lower section of active edges 8 of the hot wing 5 of soft iron and covered by the hot wing 5 of soft iron.Thermal sensitive permanent magnetic steel 4 is connected by a piece of thermal conductivity 11 with the low thermal resistance of inner glass tube 3.Also being made as heat sink 7 in thermal conductivity 11 has square connection circlip fitting recess with convenient for assembly.To meet the requirement that high thermal resistance is kept between thermal sensitive permanent magnetic steel 4 and the hot wing 5 of soft iron, making heat sink 7 and thermal conductivity 11, both are not directly contacted with.0.22 millimeter of heat sink 7 and 11 thickness of thermal conductivity.One layer of radiating paster 12 is set on the inside of the tail end of cover glass tube 2 with the hot contact position of 5 active edges of wing 8 of soft iron.Radiate 0.22 millimeter of 12 thickness of paster, 40 millimeters of width.Radiating paster 12 is connected with the laminating of the tail end of cover glass tube 2 and low thermal resistance.
The operation principle of Fig. 1 embodiments：When heat collecting element normal dip is arranged and is not at air drying state, the temperature of thermal sensitive permanent magnetic steel 4 being connected by thermal conductivity 11 with the low thermal resistance of inner glass tube 3 does not reach loss of excitation temperature, transmission levers 6 attract to decline by thermal sensitive permanent magnetic steel 4 so that the hot active edges 8 of wing 5 of soft iron, which keep down curved state not conduct heat, connects the radiating paster 12 of the inner side of cover glass tube 2, and controllable heat transfer path, which is in, closes adiabatci condition.The normal thermal-arrest of heat collecting element.
When heat collecting element is in air drying state, the temperature of thermal sensitive permanent magnetic steel 4 rise magnetic force disappears, and transmission levers 6 act on the radiating paster 12 for rising and promoting the hot active edges 8 of wing 5 of soft iron to raise up the inner side of heat transfer connection cover glass tube 2 by natural resiliency power（Position as shown in phantom in FIG.）, controllable heat transfer path, which is in, opens heat conduction state.Inner glass tube 3 is that the heat energy in the hot junction of heat pipe 1 is continually lost to environment by controllable heat transfer path.Steam inside heat pipe 1 flows to bottom end under differential pressure action and condenses and be collected in bottom end, clamps down on the internal vapor pressure of heat pipe 1 and is in low level all the time, it is ensured that heat collecting element will not bombing realize the empty sun protection of heat collecting element.
Later heat collecting element departs from air drying state, the temperature of thermal sensitive permanent magnetic steel 4 reduction magnetic force recovers and attract transmission levers 6 decline cause the hot active edges 8 of wing 5 of soft iron keep under curved state do not conduct heat the radiating paster 12 connected on the inside of cover glass tube 2, controllable heat transfer path, which is in, closes adiabatci condition, and heat collecting element again can normal work.
Fig. 1 embodiments are equally applicable to plug-in type heat collector tube element, at this moment, and inner glass tube 3 itself is not heat pipe, but are connected with a plug-in type heat pipe mating connection or low thermal resistance.The operation principle of its empty sun protection is similar, be also by thermal sensitive permanent magnetic steel 4 in air drying/non-air drying when temperature raise/lower, magnetic force disappearance/recovery to change the state of controllable heat transfer path, reach make heat collecting element obtain empty sun protection purpose.
Claims (5)
1. embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector; it is made up of several the controllable heat transfer paths being arranged in the vacuum heat-insulating layer of vacuum heat-pipe heat collecting element tail end; the controllable heat transfer path is made up of thermal sensitive permanent magnetic steel, the hot wing of soft iron, transmission levers and connection circlip, and the controllable heat transfer path has two kinds of stable states：Transmission levers rise the unlatching heat conduction state that the promotion hot wing active edges of soft iron raise up when conducting heat connection cover glass tube；Transmission levers, which decline, causes the curved closing adiabatci condition do not conducted heat when connecting cover glass tube under the hot wing active edges of soft iron, it is characterized in that the fixed edge low thermal resistance connection inner glass tube tail end or heat pipe hot junction bottom end of the hot wing of soft iron, the stage casing of transmission levers are in its free end above thermal sensitive permanent magnetic steel and put in below the active edges of the hot wing of soft iron；When thermal sensitive permanent magnetic steel has magnetic, transmission levers attract to decline by thermal sensitive permanent magnetic steel causes the curved connection cover glass tube that do not conduct heat under the hot wing active edges of soft iron；When thermal sensitive permanent magnetic steel loss of excitation, transmission levers by natural resiliency power effect rise promote the hot wing active edges of soft iron raise up heat transfer connection cover glass tube.
2. according to the embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector described in claim 1; it is characterized in that posting one layer of radiating paster with the cover glass tube tail end inner surface that the hot wing active edges of the soft iron are contacted, the radiating paster is connected with the laminating of cover glass tube tail end and low thermal resistance；Radiating paster and the heat transfer conditions of the hot wing active edges of the soft iron change according to the state change of thermal sensitive permanent magnetic steel.
3. according to the embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector described in claim 1, it is characterized in that the hot wing of the soft iron by a piece of heat sink and inner glass tube or the heat exchange of heat pipe hot junction or, the hot wing of soft iron and heat sink integral production；The heat sink is connected with inner glass tube or heat pipe hot junction low thermal resistance.
4. according to the embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector described in claim 3, it is characterized in that thermal sensitive permanent magnetic steel is connected by a piece of thermal conductivity with inner glass tube low thermal resistance；The hot wing of soft iron by heat sink punching flange integral production form；Being made in the heat sink and thermal conductivity has square connection circlip fitting recess.
5. according to the embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector described in claims 1 or 2 or 3 or 4, it is characterized in that connecting thermal conductivity, heat sink, transmission levers and radiating paster with a connection circlip；The thermal conductivity low thermal resistance connects thermal sensitive permanent magnetic steel；The heat sink and the hot wing integral production of soft iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310141754.4A CN103225904B (en) | 2013-04-22 | 2013-04-22 | Embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310141754.4A CN103225904B (en) | 2013-04-22 | 2013-04-22 | Embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector |
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| CN103225904A true CN103225904A (en) | 2013-07-31 |
| CN103225904B CN103225904B (en) | 2015-01-07 |
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| CN201310141754.4A Expired - Fee Related CN103225904B (en) | 2013-04-22 | 2013-04-22 | Embedded level vacuum thermal pipe heat collection element pressure reduction stagnation protector |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59231360A (en) * | 1983-06-15 | 1984-12-26 | Matsushita Electric Ind Co Ltd | Excessive heat collection preventive type heat collector |
| CN2791556Y (en) * | 2005-04-28 | 2006-06-28 | 蒋乐书 | Solar heat collecting pipe having builtinpipe |
| CN203190686U (en) * | 2013-04-22 | 2013-09-11 | 海宁伊满阁太阳能科技有限公司 | Embedded type lever vacuum heat pipe heat collection element decompression air drying protector |
-
2013
- 2013-04-22 CN CN201310141754.4A patent/CN103225904B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59231360A (en) * | 1983-06-15 | 1984-12-26 | Matsushita Electric Ind Co Ltd | Excessive heat collection preventive type heat collector |
| CN2791556Y (en) * | 2005-04-28 | 2006-06-28 | 蒋乐书 | Solar heat collecting pipe having builtinpipe |
| CN203190686U (en) * | 2013-04-22 | 2013-09-11 | 海宁伊满阁太阳能科技有限公司 | Embedded type lever vacuum heat pipe heat collection element decompression air drying protector |
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| CN103225904B (en) | 2015-01-07 |
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