CN213578157U - Heat pipe vacuum tube and solar heat collector composed of same - Google Patents
Heat pipe vacuum tube and solar heat collector composed of same Download PDFInfo
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- CN213578157U CN213578157U CN202022672653.8U CN202022672653U CN213578157U CN 213578157 U CN213578157 U CN 213578157U CN 202022672653 U CN202022672653 U CN 202022672653U CN 213578157 U CN213578157 U CN 213578157U
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- pipe
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- heat pipe
- cap
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 87
- 239000002184 metal Substances 0.000 claims abstract description 87
- 239000011521 glass Substances 0.000 claims abstract description 43
- 238000009833 condensation Methods 0.000 claims abstract description 36
- 230000005494 condensation Effects 0.000 claims abstract description 36
- 230000008020 evaporation Effects 0.000 claims abstract description 14
- 238000001704 evaporation Methods 0.000 claims abstract description 14
- 238000007731 hot pressing Methods 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 5
- 229910000833 kovar Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000005388 borosilicate glass Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
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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
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- Photovoltaic Devices (AREA)
Abstract
A heat pipe vacuum tube and its constituent solar heat collector, its heat pipe vacuum tube includes the metal heat absorber mounted in transparent glass tube, the metal heat absorber is made up of metal heat pipe and metal heat absorbing sheet welded on evaporation section of the heat pipe, one end of the evaporation section of the heat pipe stretches out the unclosed one end of the transparent glass tube, and connect with the condensation end of the heat pipe; a metal pipe cap is arranged outside the condensation end of the heat pipe, and the bottom end of the metal pipe cap is sealed with the unclosed end of the transparent glass pipe in a hot-pressing manner; an exhaust groove is arranged between the metal pipe cap and the condensation end of the heat pipe, and an exhaust pipe is arranged at the top end of the metal pipe cap. A plurality of heat pipe vacuum pipes are arranged in parallel to form a solar heat collector, and solar energy is output through working media in the heat collector. The utility model has the advantages that: by improving the packaging structure of the condensation end of the metal heat pipe, the heat efficiency of solar energy is improved, the production process is simplified, and the cost is reduced.
Description
Technical Field
The utility model relates to a heat pipe vacuum tube and solar heat collector who constitutes thereof belongs to the solar thermal energy utilization field.
Background
As shown in fig. 1 and fig. 2, the conventional heat-pipe vacuum tube 200 is composed of a metal heat pipe 211 with heat collecting fins 212 and a transparent single-layer glass tube 213, wherein a condensing end 2112 of the metal heat pipe protrudes out of a sealed metal end cap 214 of a glass tube end 2131, the end cap is vacuum sealed with the glass tube by thermal compression sealing or fusion sealing, and the metal end cap 214 and the glass tube 213 are soldered and sealed at 216; a small hole is typically provided in the metal end cap 214, to which is welded a small exhaust tube 215. Solar energy absorbed by the metal heat absorber 212 is transferred from the heat pipe evaporator 2111 to the condenser 2112 outside the vacuum tube. The alloy end cap 214 is made of kovar metal with the grade of 4J42, contains 42% of nickel, has the expansion coefficient of 5.5 multiplied by 10 < -6 >/degree and the expansion coefficient of borosilicate glass of 3.3 multiplied by 10 < -6 >/degree, is relatively matched, and is a well-known hot sealing material. Although the heat-pipe vacuum tube 200 has high thermal efficiency, it is made of copper heat pipe, kovar, high silver-containing brazing wire, etc., and has high cost and complex production process, and thus has not been widely used so far. Therefore, it is necessary to invent a new technology to greatly reduce the cost of the heat pipe vacuum tube while keeping the heat efficiency high.
Disclosure of Invention
The utility model provides a heat pipe vacuum tube and solar heat collector who constitutes to solve the complicated and with high costs problem of technology that prior art exists.
The technical scheme of the utility model is that: a heat pipe vacuum tube comprises a metal heat absorber and a transparent glass tube, wherein one end of the transparent glass tube is sealed, the metal heat absorber comprises a metal heat pipe and a metal heat absorbing sheet welded on an evaporation section of the heat pipe, the evaporation section of the heat pipe is arranged in the transparent glass tube, one end of the evaporation section of the heat pipe extends out of the unsealed end of the transparent glass tube and is connected with a condensation end of the heat pipe, and the heat pipe vacuum tube is characterized in that a metal pipe cap is arranged outside the condensation end of the heat pipe, and an everted flat edge is arranged at the bottom end of the metal pipe cap; the unclosed end of the transparent glass tube is provided with a glass flange, and the outward turned flat edge and the glass flange are mutually sealed by hot pressing through pure lead wires; the inner diameter of the metal pipe cap is slightly larger than the outer diameter of the condensation end of the heat pipe, the metal pipe cap tightly presses and wraps the condensation end of the heat pipe, and the metal pipe cap and the condensation end of the heat pipe are in close contact for heat conduction; an axial exhaust groove is arranged between the inner peripheral surface of the metal pipe cap and the outer peripheral surface of the heat pipe condensation end, a gap is reserved between the top end of the heat pipe condensation end and the top end of the metal pipe cap, and an exhaust pipe is arranged at the top end of the metal pipe cap.
A solar heat collector composed of the heat pipe vacuum tubes comprises the heat pipe vacuum tubes, a collecting pipe, heat transfer short tubes and a reflecting strip, wherein a plurality of semicircular grooves are formed in the upper side of the collecting pipe, and the heat transfer short tubes are connected in each semicircular groove; the metal pipe cap of a heat pipe vacuum pipe is respectively arranged in each heat transfer short pipe, a plurality of heat pipe vacuum pipes are arranged in parallel at intervals, and a herringbone reflective strip is arranged between the adjacent heat pipe vacuum pipes.
The utility model has the advantages that: by improving the packaging structure of the condensation end of the metal heat pipe, the vacuum sealing technology of lead transition hot press sealing for aluminum and borosilicate glass can be adopted; the condensation end is packaged in the vacuum tube, and conducts heat to the outside through the heat conduction of the tightly wrapped aluminum sleeve cap, so that a feasible scheme is provided for the heat tube vacuum tube to comprehensively realize the replacement of copper and kovar alloy by aluminum; through the design of the vacuumizing exhaust structure, the heat absorber in the tube and the reflection condensation among the tubes and the improvement of the header dry contact heat transfer structure, the heat efficiency of solar energy is improved, the production process is simplified, and the cost is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of a conventional heat-pipe vacuum tube;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the overall structure of the heat pipe vacuum tube of the present invention;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
FIG. 5 is a cross-sectional view C-C of FIG. 3;
FIG. 6 is an enlarged view of the right portion of FIG. 3;
FIG. 7 is a cross-sectional view E-E of FIG. 6;
FIG. 8 is a sectional view F-F of FIG. 6;
FIG. 9 is a schematic view of an assembly structure of a heat pipe vacuum tube solar collector (partial) of the present invention;
FIG. 10 is a sectional view taken at H-H of FIG. 9;
FIG. 11 is a cross-sectional view I-I of FIG. 9;
fig. 12 is a sectional view taken along line G-G of fig. 9.
Reference numerals indicate the same.
Detailed Description
Referring to fig. 3-8, the present invention relates to a heat pipe vacuum tube, including a metal heat absorbing body and a transparent glass pipe 101, wherein one end of the transparent glass pipe 101 is sealed, the metal heat absorbing body is composed of a metal heat pipe 104 and a metal heat absorbing sheet 106 welded on the heat pipe evaporation section 1042, the heat pipe evaporation section 1042 is installed in the transparent glass pipe 101, one end of the heat pipe evaporation section 1042 extends out of the unsealed end of the transparent glass pipe 101 and is connected to a heat pipe condensation end 1041, and is characterized in that a metal pipe cap 102 is disposed outside the heat pipe condensation end 1041, and an everting flat edge 1021 is disposed at the bottom end of the metal pipe cap 102; the unclosed end of the transparent glass tube 101 is provided with a glass flange 1011, and the outward turned flat edge 1021 and the glass flange 1011 are mutually sealed and connected by hot pressing through a pure lead wire 103; the inner diameter of the metal pipe cap 102 is slightly larger than the outer diameter of the heat pipe condensation end 1041, the metal pipe cap 102 tightly wraps the heat pipe condensation end 1041, and the two are in close contact to conduct heat; an axial exhaust groove 10411 is provided between the inner peripheral surface of the metal cap 102 and the outer peripheral surface of the heat pipe condensation end 1041, a gap K is provided between the top end of the heat pipe condensation end 1041 and the top end of the metal cap 102, and an exhaust pipe 105 is provided at the top end of the metal cap 102.
The utility model discloses an experiment proves, metal pipe cap 102 can be that the aluminum product of high expansion coefficient makes, and expansion coefficient 23 x 10-6/degree is done middle hot pressing transition sealing material with pure lead wire 103 and has successfully realized vacuum seal, and this is one of the main improvement of the utility model. The bottom end of the metal pipe cap 102 is processed into an outward turned flat edge 1021, so that the complex welding process between the original Kovar large cover and the heat pipe is omitted. Further, the utility model discloses in inserting heat pipe condensation end 1041 in metal tube cap 102, in the vacuum tube that metal tube cap 102 and transparent glass pipe 101 press seal become promptly, need not wear out the big lid of metal that transparent glass pipe 101 opened the end, simplified manufacturing process. In order to reduce the thermal resistance of the heat pipe condensation end 1041 through the metal pipe cap 102 by transferring heat outwards, the utility model discloses a time heat pipe condensation end 1041 inserts the metal pipe cap 102 after, compresses tightly the parcel with the metal pipe cap 102 that the aluminum pipe was made and live the heat pipe condensation end 1041 that has inserted, reaches both in close contact with heat conduction.
The utility model discloses set up blast pipe 105 on the top of tubular metal resonator cap 102, with this blast pipe 105 of tubular metal resonator cap 102 top throat welding, set up 1-3 axial exhaust slot 10411 on the outer peripheral face of heat pipe condensation end 1041, exhaust slot 10411's cross-section can be half-circular arc, radius 2-3 mm. The heat pipe condensation end 1041 is inserted into the metal pipe cap 102, a gap K not smaller than 5mm is left between the end of the heat pipe condensation end 1041 and the end of the metal pipe cap 102, and during vacuum exhaust, gas in the transparent glass pipe 101 flows through a flow channel formed by an exhaust groove 10411 and the gap K arranged on the outer wall of the heat pipe condensation pipe 1041 and is finally exhausted through the exhaust pipe 105 at the top end of the metal pipe cap 102.
The metal heat sink 106 is an aluminum or copper tape with a selective absorption coating, and can be welded to the evaporation section 1042 of the heat pipe by ultrasonic or laser. The cross section of the metal heat sink 106 is a chevron shape, the bottom width W being the inner diameter of the transparent glass tube 101 and the height H being the radius of the transparent glass tube 101 (see FIG. 7). Compared with the existing plane heat absorbing sheet, the heat absorbing area is increased by 1.4 times, and light absorbing conditions are created for the reflected light of the herringbone reflecting strips arranged between the tubes.
Referring to fig. 9-12, the solar heat collector of the present invention comprises the heat pipe vacuum tubes, the solar heat collector 300 comprises a heat pipe vacuum tube a, a header 301, heat transfer short tubes 302 and reflective strips 303, wherein a plurality of semicircular grooves 3011 are disposed on the upper side of the header 301, and the heat transfer short tubes 302 are connected to each semicircular groove 3011; a metal pipe cap 102 of a heat pipe vacuum pipe A is respectively arranged in each heat transfer short pipe 302, and a plurality of heat pipe vacuum pipes A are arranged in parallel at intervals, and the interval is 1.5-2 times of the outer diameter of the transparent glass pipe 101; a herringbone reflecting strip 303 is arranged between the adjacent heat pipe vacuum pipes A, and the bottom width and the height of the reflecting strip 303 are respectively 0.5-1.0 times of the outer diameter and the radius of the transparent glass pipe 101; the reflecting strips 303 are aligned with the feet of the metal heat absorbing fins 106 in the transparent glass tube 101, and reflect sunlight incident between the transparent glass tube 101 to the metal heat absorbing fins 106 in the tube. The reflective strips 303 can be made of mirror aluminum or ordinary aluminum sheet with reflective adhesive tape.
The solar heat collector (axial direction of the heat pipe vacuum pipe A) can be arranged in the north-south direction, and the herringbone metal heat absorbing sheets 106 face to the sunlight. The metal cap 102 of each heat-pipe vacuum tube a may be dry-inserted into the heat transfer stub 302 on the manifold 301. The manifold 301 may be a copper or aluminum circular tube, a semicircular groove 3011 is pressed at the position of the manifold 301 corresponding to the metal cap 102 of each heat-pipe vacuum tube a, a heat transfer short tube 302 is embedded and welded in the semicircular groove 3011, the inner diameter of the heat transfer short tube 302 is slightly larger than the outer diameter of the metal cap 102, and the length of the heat transfer short tube 302 is equal to that of the metal cap 102. The metal pipe cap 102 of each heat pipe vacuum pipe A is inserted into the corresponding heat transfer short pipe 302 to form dry contact heat transfer. The solar energy collected by the heat pipe vacuum pipe A is output and utilized by the working medium in the collecting pipe 301.
Claims (7)
1. A heat pipe vacuum tube comprises a metal heat absorbing body and a transparent glass tube (101), wherein one end of the transparent glass tube (101) is closed, the metal heat absorbing body comprises a metal heat pipe (104) and a metal heat absorbing sheet (106) welded on a heat pipe evaporation section (1042), the heat pipe evaporation section (1042) is installed in the transparent glass tube (101), one end of the heat pipe evaporation section (1042) extends out of the non-closed end of the transparent glass tube (101) and is connected with a heat pipe condensation end (1041), the heat pipe vacuum tube is characterized in that a metal pipe cap (102) is arranged outside the heat pipe condensation end (1041), and an everting flat edge (1021) is arranged at the bottom end of the metal pipe cap (102); one unsealed end of the transparent glass tube (101) is provided with a glass flange (1011), and the outward turned flat edge (1021) and the glass flange (1011) are mutually sealed and connected in a hot pressing way through a pure lead wire (103); the inner diameter of the metal pipe cap (102) is slightly larger than the outer diameter of the heat pipe condensation end (1041), the metal pipe cap (102) tightly presses and wraps the heat pipe condensation end (1041), and the metal pipe cap and the heat pipe condensation end are in close contact for heat conduction; an axial exhaust groove (10411) is arranged between the inner circumferential surface of the metal pipe cap (102) and the outer circumferential surface of the heat pipe condensation end (1041), a gap (K) is reserved between the top end of the heat pipe condensation end (1041) and the top end of the metal pipe cap (102), and an exhaust pipe (105) is arranged at the top end of the metal pipe cap (102).
2. A heat pipe vacuum tube as claimed in claim 1, characterized in that the metal pipe cap (102) is made of an aluminum pipe, the width of the turned-out flat edge (1021) at the bottom end of which is 5-10mm, the top end of which is necked down and a small aluminum pipe is welded as the exhaust pipe (105); the glass flange (1011) is an inward-turning flange or an outward-turning flange.
3. A heat-pipe vacuum tube as claimed in claim 1, characterized in that the metal heat pipe (104) is an aluminum heat pipe or a copper heat pipe; the outer diameter of the condensation end (1041) of the heat pipe is larger than that of the evaporation section (1042) of the heat pipe.
4. The heat pipe vacuum tube as claimed in claim 1, wherein the metal heat sink sheet (106) is an aluminum or copper strip with selective absorption coating, and is welded on the evaporation section (1042) of the heat pipe; the cross section of the metal heat absorbing sheet (106) is in a herringbone shape, the upper surface faces the sunlight, and the bottom width is equal to or slightly smaller than the inner diameter of the transparent glass tube (101).
5. A solar heat collector composed of heat pipe vacuum pipes according to claim 1, wherein the solar heat collector (300) comprises heat pipe vacuum pipes (a), a header pipe (301), heat transfer short pipes (302) and reflective strips (303), a plurality of semicircular grooves (3011) are arranged on the upper side of the header pipe (301), and the heat transfer short pipes (302) are connected in each semicircular groove (3011); a metal pipe cap (102) of a heat pipe vacuum pipe (A) is arranged in each heat transfer short pipe (302), a plurality of heat pipe vacuum pipes (A) are arranged in parallel at intervals, and a herringbone reflective strip (303) is arranged between the adjacent heat pipe vacuum pipes (A).
6. The solar heat collector according to claim 5, wherein the distance between the heat pipe vacuum pipes (A) is 1.5-2 times of the outer diameter of the transparent glass pipe (101); the bottom width and the height of the reflecting strip (303) are respectively 0.5-1.0 time of the outer diameter and the radius of the transparent glass tube (101); the reflecting strips (303) are in a straight line with feet of the metal heat absorbing sheets (106) in the transparent glass tube (101), and reflect sunlight incident between the transparent glass tube (101) to the metal heat absorbing sheets (106) in the tube.
7. The solar collector according to claim 5 wherein said headers (301) and heat transfer stubs (302) are circular copper or aluminum tubes; the inner diameter of the heat transfer short pipe (302) is slightly larger than the outer diameter of the metal pipe cap (102), and the length of the heat transfer short pipe is the same as that of the metal pipe cap (102); structural metal pipe caps (102) of the heat pipe vacuum pipes (A) are inserted into the corresponding heat transfer short pipes (302) to form dry contact heat transfer, and the solar energy collected by the heat pipe vacuum pipes (A) is output by working media in the collecting pipes (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022672653.8U CN213578157U (en) | 2020-11-18 | 2020-11-18 | Heat pipe vacuum tube and solar heat collector composed of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022672653.8U CN213578157U (en) | 2020-11-18 | 2020-11-18 | Heat pipe vacuum tube and solar heat collector composed of same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213578157U true CN213578157U (en) | 2021-06-29 |
Family
ID=76538743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022672653.8U Active CN213578157U (en) | 2020-11-18 | 2020-11-18 | Heat pipe vacuum tube and solar heat collector composed of same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213578157U (en) |
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2020
- 2020-11-18 CN CN202022672653.8U patent/CN213578157U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231207 Address after: Room 706-13, Building H2, Changyuandao International Enterprise Community, Wuqing Development Zone, Wuqing District, Tianjin City, 301700 (centralized office area) Patentee after: Tianjin Winston New Energy Co.,Ltd. Address before: 100191 1-1305, No.3 Huayuan Road, Haidian District, Beijing Patentee before: Jiang Xinian Patentee before: Jiang Lun |