CN101968281B - Vacuum heat-absorbing tube of solar water heater - Google Patents
Vacuum heat-absorbing tube of solar water heater Download PDFInfo
- Publication number
- CN101968281B CN101968281B CN2010105263467A CN201010526346A CN101968281B CN 101968281 B CN101968281 B CN 101968281B CN 2010105263467 A CN2010105263467 A CN 2010105263467A CN 201010526346 A CN201010526346 A CN 201010526346A CN 101968281 B CN101968281 B CN 101968281B
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- solar
- tube
- inner tube
- heat
- return duct
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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
Abstract
The invention discloses a vacuum heat-absorber of a solar water heater, comprising an inner tube and an outer tube, wherein a reflow tube is arranged in the inner tube along the axial direction of the inner tube and is provided with a small through hole. The invention has the advantages that: on the basis of the traditional solar water heater and under the same condition, by improving the internal structure of the solar vacuum heater-absorbing tube, enhancing lager circular current between hot water in the solar vacuum heat-absorbing tube and water in a heat-preserving container and reducing the temperature difference between the hot water in the solar vacuum heat-absorbing tube and the water in the heat-preserving container, solar energy absorbed by the solar vacuum heat-absorbing tube can be transmitted to and stored in the heat-preserving container in time, heat-radiating loss of hot water which generates heat radiation due to the high temperature in the solar vacuum heat-absorbing tube can be reduced, thereby improving the heat efficiency of the solar water heater; and compared with the prior art, the invention can remarkably improve the heat efficiency of the solar water heater by 2-8 percent by increasing cost slightly and can improve the temperature of the hot water of the solar water heater by 1-5DEG C.
Description
Technical field
The present invention relates to the solar water heater field, is a kind of solar-energy water heater vacuum endothermic tube specifically.
Background technology
At present solar water heater relies on solar vacuum heat absorbing pipe to absorb the water heating of solar thermal energy in will manage, and the water of heating in the pipe is because the water in buoyancy and the heat-preserving container carries out heat exchange, and the temperature raising that makes the insulation inner bucket water becomes hot water and for people to use.Because the solar-energy water heater vacuum endothermic tube belongs to slender type, internal diameter is less with respect to length, because the conduction of the heat of water and flow behavior, being difficult to form the outer hot water that heats makes progress mobile and large circulation that water that internal layer does not heat flows downward, just in pipe, form a plurality of little circulation, mutually alternately the solar energy that absorbs is delivered to heat-preserving container by these little circulation, therefore the lower water of temperature can not directly arrive the vacuum heat absorbing pipe inner bottom part in the heat-preserving container, makes the temperature difference of the interior water of vacuum heat absorbing pipe and the water in the heat-preserving container larger.Because the temperature of water is higher in the vacuum heat absorbing pipe, when absorbing solar energy, also follows outside heat-radiation heat-dissipating, thereby affect the thermal efficiency of solar water heater.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of solar-energy water heater vacuum endothermic tube, it can improve solar water heater the thermal efficiency, solar water heater is produced the hot water temperature higher.
Technical scheme: in order to solve the problems of the technologies described above, a kind of solar-energy water heater vacuum endothermic tube of the present invention comprises inner and outer tubes, is axially installed with return duct in described inner tube and along inner tube, has small through hole at described return duct.
The inner tube equal in length of described return duct and vacuum tube.
The diameter of described return duct is less than the radius of vacuum tube inner tube.
The diameter of described return duct is 0.5～2.0cm.
On an end of the stage casing of described return duct, close described inner tube bottom, respectively have one or more described small through hole.
Arrange described small through hole in the stage casing on the described return duct to opening one between the end near described inner tube bottom.
Between the two ends of described return duct, open the described small through hole of a row.
Described return duct is plastic tube or glass tube.
Principle of the present invention: temperature is lower in the return duct the smooth and easy inflow solar energy vacuum tube of water inner tube bottom and each section, the hot water that promotes to have heated in the inner tube rises and flows to heat-preserving container, make between the water that temperature is higher in the lower water of the interior temperature of heat-preserving container and the inner tube and form stable large circulation, the heat that solar vacuum heat absorbing pipe is absorbed in time is delivered in the heat-preserving container to be saved, reduced the temperature of hot water in the solar vacuum heat absorbing pipe, reduce the thermal radiation loss of hot water in the solar vacuum heat absorbing pipe, improved the thermal efficiency of solar water heater.
Beneficial effect: compared with prior art, advantage of the present invention is as the basis take existing solar water heater, under the same conditions by improving the solar vacuum heat absorbing pipe internal structure, strengthen hot water and the large circulation that is incubated inner bucket water in the solar vacuum heat absorbing pipe, reduce hot water and the temperature difference that is incubated inner bucket water in the solar vacuum heat absorbing pipe, the solar energy that solar vacuum heat absorbing pipe is absorbed is delivered in time in the heat-preserving container and stores, reduce the interior hot water of solar vacuum heat absorbing pipe and produce thermal-radiating radiation loss because temperature is high, thereby improve the thermal efficiency of solar water heater; Increase the thermal efficiency that very little cost can obviously improve solar water heater, compared with prior art can improve the thermal efficiency 2%～8%, 1 ℃～5 ℃ of the hot water temperatures of raising solar water heater.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of return duct from the stage casing to perforate the end bottom described inner tube among the present invention;
Fig. 3 is the structural representation of perforate between the return duct two ends among the present invention;
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvement (such as the material that changes return duct, diameter, return duct position of opening, the number of openings etc.), these improvement also should be considered as protection scope of the present invention.
Embodiment 1: as shown in Figure 1, a kind of solar-energy water heater vacuum endothermic tube of the present invention comprises inner tube 1 and outer tube 2, is axially installed with return duct 3 in inner tube 1 and along inner tube 1, inner tube 1 equal in length of return duct 3 and vacuum tube; The diameter of return duct 3 is less than the radius of vacuum tube inner tube 1, and the diameter of return duct 3 is preferably 1.0cm; Open 2 through holes 4 in the stage casing of return duct 3, open 4 through holes 4 near an end of described inner tube 1 bottom, in solar vacuum heat absorbing pipe, form two large circulation.Wherein said return duct 3 is the little plastic tube of thermal conductivity factor.
During installation, at first return duct 3 is put in the inner tube 1 of vacuum heat absorbing pipe and relied on himself gravity to abut against on the in the shade wall of described inner tube 1, an and end correspondence that will have through hole 4 bottom that inner tube 1, the smooth and easy inflow solar energy vacuum tube of water inner tube 1 bottom that return duct 3 interior temperature are lower like this, the hot water that promotes to have heated in the inner tube 1 rises and flows to heat-preserving container, make between the water that temperature is higher in the lower water of the interior temperature of heat-preserving container and the inner tube 1 and form stable large circulation, the heat that solar vacuum heat absorbing pipe is absorbed in time is delivered in the heat-preserving container to be saved, reduced the temperature of hot water in the solar vacuum heat absorbing pipe, reduce the thermal radiation loss of hot water in the solar vacuum heat absorbing pipe, improved the thermal efficiency of solar water heater.
Embodiment 2: a kind of solar-energy water heater vacuum endothermic tube of the present invention, comprise inner tube 1 and outer tube 2, and in inner tube 1 and along inner tube 1, be axially installed with return duct 3, inner tube 1 equal in length of return duct 3 and vacuum tube; The diameter of return duct 3 is less than the radius of vacuum tube inner tube 1, and the diameter of return duct 3 is preferably 1.2cm; As shown in Figure 2, to arranging described small through hole 4 near opening one between the end of inner tube 1 bottom, the quantity of through hole 4 is 4～6, forms like this 4～6 large circulation in solar vacuum heat absorbing pipe in the stage casing on the return duct 3.Wherein said return duct 3 is the little plastic tube of thermal conductivity factor.
Installation method is substantially the same manner as Example 1.
Embodiment 3: a kind of solar-energy water heater vacuum endothermic tube of the present invention, comprise inner tube 1 and outer tube 2, and in inner tube 1 and along inner tube 1, be axially installed with return duct 3, inner tube 1 equal in length of return duct 3 and vacuum tube; The diameter of return duct 3 is less than the radius of vacuum tube inner tube 1, and the diameter of return duct 3 is preferably 0.8cm; As shown in Figure 3, open the described small through hole 4 of a row between return duct 3 two ends, the quantity of through hole 4 is 6～10, forms like this 6～10 large circulation in solar vacuum heat absorbing pipe.It wherein is the thermal conductivity factor cuvette.
Installation method is identical with embodiment 1.
Embodiment 4: substantially the same manner as Example 3, difference is that the diameter of return duct 3 is 2.0cm.
Embodiment 5: substantially the same manner as Example 3, difference is that the diameter of return duct 3 is 0.5cm.
Claims (1)
1. a solar-energy water heater vacuum endothermic tube comprises inner tube (1) and outer tube (2), it is characterized in that, is axially installed with return duct (3) in described inner tube (1) and along inner tube (1), has small through hole (4) at described return duct (3); On an end of the stage casing of described return duct (3), close described inner tube (1) bottom, respectively have one or more described small through hole (4); Return duct (3) abuts against on the in the shade wall of described inner tube (1), and an end correspondence that will have a close described inner tube bottom of small through hole (4) the bottom of inner tube (1); Inner tube (1) equal in length of described return duct (3) and vacuum heat absorbing pipe; The diameter of described return duct (3) is less than the radius of vacuum heat absorbing pipe inner tube (1); The diameter of described return duct (3) is 0.5～2.0cm; Described return duct (3) is plastic tube or glass tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105263467A CN101968281B (en) | 2010-10-29 | 2010-10-29 | Vacuum heat-absorbing tube of solar water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105263467A CN101968281B (en) | 2010-10-29 | 2010-10-29 | Vacuum heat-absorbing tube of solar water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101968281A CN101968281A (en) | 2011-02-09 |
| CN101968281B true CN101968281B (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105263467A Expired - Fee Related CN101968281B (en) | 2010-10-29 | 2010-10-29 | Vacuum heat-absorbing tube of solar water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101968281B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353352A (en) * | 1980-10-23 | 1982-10-12 | Bio-Energy Systems, Inc. | Solar thermosyphon water heater |
| CN2773562Y (en) * | 2004-09-17 | 2006-04-19 | 钟汉辉 | Convective circualtion tube of solar water heater |
| CN1900621A (en) * | 2005-07-20 | 2007-01-24 | 徐宝安 | Multifunction heat syphon convection double circulation solar water heater |
| CN201535587U (en) * | 2009-07-23 | 2010-07-28 | 汤宝田 | Novel solar vacuum tube hot water return liner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598424B (en) * | 2008-06-04 | 2013-11-20 | 淄博环能海臣环保技术服务有限公司 | Magnetic antiscale all-glass evacuated semi-round planar collector tube with flow guider |
-
2010
- 2010-10-29 CN CN2010105263467A patent/CN101968281B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353352A (en) * | 1980-10-23 | 1982-10-12 | Bio-Energy Systems, Inc. | Solar thermosyphon water heater |
| CN2773562Y (en) * | 2004-09-17 | 2006-04-19 | 钟汉辉 | Convective circualtion tube of solar water heater |
| CN1900621A (en) * | 2005-07-20 | 2007-01-24 | 徐宝安 | Multifunction heat syphon convection double circulation solar water heater |
| CN201535587U (en) * | 2009-07-23 | 2010-07-28 | 汤宝田 | Novel solar vacuum tube hot water return liner |
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| Publication number | Publication date |
|---|---|
| CN101968281A (en) | 2011-02-09 |
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Granted publication date: 20130109 Termination date: 20151029 |
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