CN106766250A - A kind of solar water heater - Google Patents

A kind of solar water heater Download PDF

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Publication number
CN106766250A
CN106766250A CN201710097983.9A CN201710097983A CN106766250A CN 106766250 A CN106766250 A CN 106766250A CN 201710097983 A CN201710097983 A CN 201710097983A CN 106766250 A CN106766250 A CN 106766250A
Authority
CN
China
Prior art keywords
glass
reinforced plastic
fibre reinforced
plastic insulation
water heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710097983.9A
Other languages
Chinese (zh)
Inventor
吴海杰
靖国平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGDONG KINGTEC TECHNOLOGY DEVELOPMENT Co Ltd
Original Assignee
GUANGDONG KINGTEC TECHNOLOGY DEVELOPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUANGDONG KINGTEC TECHNOLOGY DEVELOPMENT Co Ltd filed Critical GUANGDONG KINGTEC TECHNOLOGY DEVELOPMENT Co Ltd
Priority to CN201710097983.9A priority Critical patent/CN106766250A/en
Publication of CN106766250A publication Critical patent/CN106766250A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/40Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/40Preventing corrosion; Protecting against dirt or contamination
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/80Accommodating differential expansion of solar collector elements
    • F24S40/85Arrangements for protecting solar collectors against adverse weather conditions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S2025/601Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules by bonding, e.g. by using adhesives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S2080/01Selection of particular materials
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses a kind of solar water heater, including glass fibre reinforced plastic insulation casing, integrated store collected device and hollow tempered glass, integrated store collected device is located at glass fibre reinforced plastic insulation box house, and hollow tempered glass is arranged on glass fibre reinforced plastic insulation casing top glass fibre reinforced plastic insulation box sealing;The glass fibre reinforced plastic insulation casing is snail wire, and its inner surface is provided with the polishing reflective aluminum mirror high of cochleoid;The integrated store collected device is respectively arranged at two ends with water inlet and delivery port.The solar water heater that the present invention is provided designs simple science, and the cleaning of water quality is kept by integrated store collected device, and cleaning is also convenient for, and is not likely to produce incrustation scale, and the efficiency high of water is not only heated by the integrated store collected device of one, and heat insulation effect might as well.

Description

A kind of solar water heater
Technical field
It is a kind of solar water heater of efficiency high specifically the present invention relates to solar water heater field.
Background technology
Solar water heater is the device that solar energy is converted into heating, by water from low-temperature heat to high temperature, to meet Hot water of the people in life, production is used.Traditional electron tubes type domestic solar water heater be by thermal-collecting tube, storage tank and The correlation spare and accessory parts composition such as support, sunlight is shone on the black heat-sink shell of second layer glass through the ground floor glass of endothermic tube, By the heat absorption of solar energy, due to being vacuum heat-insulation between layer glass, heat transfer will greatly reduce that (radiant heat transfer is still In the presence of, but without heat transfer and thermal convection current), most heats can only be transmitted to the water inside glass tube, make in glass tube Water is heated, and the water of heating just gently up enters insulation water butt, the relatively low water edge of temperature within the barrel along glass heating surface of tubes Glass tube shady face to be supplemented into glass tube, so constantly circulation, the water in insulation water butt is constantly heated, so as to reach The purpose of hot water.
Traditional solar vacuum-tube water heater, sunlight only impinges upon the top half of vacuum tube, and actual sun utilization rate is not It is high;Outdoor is positioned over for a long time, its utilization rate will be lower after glass fiber reinforced plastic surface dust stratification dirt, if nor so if thinking cleaning It is convenient;Meet the bad weathers such as typhoon, hail by chance, the possibility that it is damaged is high.
The content of the invention
It is an object of the invention to provide a kind of cleaning that can well keep water quality, cleaning is also convenient for, and is not likely to produce water Dirt, the solar water heater of efficiency high
In order to overcome the above-mentioned defect present invention of the prior art to adopt the following technical scheme that:
A kind of solar water heater, it is characterised in that:
Including glass fibre reinforced plastic insulation casing, integrated store collected device and hollow tempered glass, integrated store collected device is located at glass Inside glass steel thermal-insulating body, hollow tempered glass is arranged on glass fibre reinforced plastic insulation casing top glass fibre reinforced plastic insulation box sealing;Institute Glass fibre reinforced plastic insulation casing is stated for snail wire, its inner surface is provided with the polishing reflective aluminum mirror high of cochleoid;The integrated storage Collector is respectively arranged at two ends with water inlet and delivery port.
Further, the integrated store collected device includes heat collector and water tank, heat collector and integral tank.
Further, the integrated store collected device is made by multiple-energy-source enamel and steel plate, and its outer surface is black Layer, inner surface is enamel.
Further, the hollow tempered glass is the low iron double layer glass of tempering, and hollow tempered glass includes two panels Safety glass and aluminum alloy frame, are bonded two panels safety glass and aluminum alloy frame by high intensity high-air-tightness compound binding agent Hollow tempered glass is formed together.
Further, it is provided with drier inside the aluminum alloy frame.
Further, the safety glass in the two panels safety glass positioned at upside is provided with paper glue at the 30mm of outside Band.
Further, the wall thickness of the glass fibre reinforced plastic insulation casing is 50~80mm, and glass fibre reinforced plastic insulation casing is provided with placement The plummer of hollow tempered glass and outer bound edge, outer bound edge section are in " Z " type.
Further, the profile of the plummer is bigger than the outline of hollow tempered glass, and glass fibre reinforced plastic insulation casing is with Empty safety glass passes through one-component polyurethane sealant gap bonding together.
Preferably, the step of gap bonding is:
A. it is first that glass fibre reinforced plastic insulation tank surface and hollow tempered glass surface cleaning is clean;
B. the one-component polyurethane sealant of black is evenly coated on the side of glass fibre reinforced plastic insulation casing with Pneumatic glue gun
C. by hollow tempered glass, the side with paper self-adhesive tape is not placed on the plummer of glass fibre reinforced plastic insulation casing, with forcing It is flat, it is ensured that each seam has glue;
D. filled up with one-component polyurethane sealant in seam crossing, be equably applied on hollow tempered glass, finally torn Fall paper self-adhesive tape.
The solar water heater that the present invention is provided designs simple science, and the clear of water quality is kept by integrated store collected device Clean, cleaning is also convenient for, and is not likely to produce incrustation scale, and the efficiency high of water, Er Qiebao are not only heated by the integrated store collected device of one Temp effect might as well.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also Other accompanying drawings are obtained with according to these accompanying drawings:
Fig. 1 is a kind of solar water heater embodiment schematic diagram of the invention;
Fig. 2 is the B-B schematic diagrames of Fig. 1 solar water heaters;
Fig. 3 is the close-up schematic view of Fig. 2 solar water heater main body As;
Fig. 4 is the schematic diagram of solar water heater different time sunlight;
In accompanying drawing:1- glass fibre reinforced plastic insulation casings;The integrated store collected devices of 2-;3- hollow tempered glasses;11- is high, and polishing is reflective Aluminium mirror;12- plummers;The outer bound edges of 13-;21- water inlets;22- delivery ports;31- safety glass;32- aluminum alloy frames;4- single groups Divide polyurethane sealant.
Specific embodiment
The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment, herein with schematic implementation of the invention Example and explanation are for explaining the present invention but not as a limitation of the invention.
The casing of a kind of solar water heater, including glass fibre reinforced plastic insulation as shown in Figures 1 to 41, the integrated and of store collected device 2 Hollow tempered glass 3, integrated store collected device 2 is located inside glass fibre reinforced plastic insulation casing 1, and hollow tempered glass 3 is arranged on glass The top of steel thermal-insulating body 1 seals glass fibre reinforced plastic insulation casing 1;Glass fibre reinforced plastic insulation casing 1 is snail wire, and its inner surface is provided with The polishing reflective aluminum mirror 11 high of cochleoid;Integrated store collected device 2 is respectively arranged at two ends with water inlet 21 and delivery port 22.
Integrated store collected device 2 includes heat collector and water tank, heat collector and integral tank.
Integrated store collected device 2 is made by multiple-energy-source enamel steel plate special and enamel, and its outer surface is black coating, Inner surface is enamel.
Hollow tempered glass 3 is the low iron double layer glass 3 of tempering, and hollow tempered glass 3 includes two panels safety glass 31 With aluminum alloy frame 32, two panels safety glass 31 is bonded in aluminum alloy frame 32 by high intensity high-air-tightness compound binding agent Hollow tempered glass 3 is formed together.Drier is provided with inside aluminum alloy frame.Positioned at the safety glass of upside in two panels safety glass Paper self-adhesive tape is provided with the 30mm of outside.
The wall thickness of glass fibre reinforced plastic insulation casing 1 is 50~80mm, and glass fibre reinforced plastic insulation casing 1 is provided with placement hollow tempered glass 3 plummer 12 and outer bound edge 13, the section of outer bound edge 13 is in " Z " type.
The profile of plummer 13 30~40mm bigger than the outline of hollow tempered glass 3, glass fibre reinforced plastic insulation casing 1 with it is hollow Safety glass 3 passes through the gap bonding of one-component polyurethane sealant 4 together.
The step of gap bonding is:
A. it is first that the surface of glass fibre reinforced plastic insulation casing 1 and the surface cleaning of hollow tempered glass 3 is clean;
B. the one-component polyurethane sealant 4 of black is evenly coated on the side of glass fibre reinforced plastic insulation casing 1 with Pneumatic glue gun
C. by hollow tempered glass 3, the side with paper self-adhesive tape is not placed on the plummer 12 of glass fibre reinforced plastic insulation casing 1, firmly Flatten, it is ensured that each seam has glue;
D. filled up with one-component polyurethane sealant in seam crossing, be equably applied on hollow tempered glass 3, finally torn Fall paper self-adhesive tape.
Further embodiment is described in detail:
In addition to upper surface absorbs sunlight energy, the lower demifacet of its circular collector can also lead to integrated storage collector 2 The reflective heat absorption of too high polishing reflective aluminum mirror 11, can so improve heat absorption efficiency up to 30%, and conventional vacuum tubular type peace is board-like too It is positive can heat collector the thermal efficiency about between 47%~52.5%, coordinate polishing reflective aluminum mirror 11 high, whole generatine set heat efficiency can be with Reach 80%.Monolithic case is that heat-insulation layer and polishing reflective aluminum mirror 11 high are integrated, double-deck coated with one block of low iron of tempering topmost Double glazing 3, can be hit with anti-hail, and easy to clean.The inner bag surface of integrated storage collector 2 is using the plating new work of enamel The means of skill realize anti-corrosion, acid-proof, can well keep the clean of water quality.So this water heater both can be individually attached use In family, it is also possible to realize the installation of modular, for villa, engineering, hotel etc..
Height polishing reflective aluminum mirror 11 forms snail line style by specific radian, it is possible to achieve no matter the east of the sun rises west Fall, can to greatest extent absorb sunshine, this is our whole machine thermal efficiency of solar water heater relative to traditional solar energy The main cause of lifting.Double cochleoid bottom junctions can well support the weight of whole water tank.
Integrated storage collector 2 is made using multiple-energy-source enamel steel plate special, and outer surface brush is black, and inner surface is to ward off Porcelain, this structure can protect the clean of water quality, moreover it is possible to extend the service life of water tank.Its major function absorbs sunshine Heat, is therewith heated the water of the inside by heat exchange, and it is both heat collector, is again water tank.Whole machine installation is to incline to install, together Sample is floated using hot water, and the principle that cold water sinks, internal volume reaches 250L, and produced hot water can expire in the case of sunny The use of many people of foot.
Hollow tempered glass 3 is a kind of good heat-insulated, sound insulation, beautiful and applicable, and it is, with two panels safety glass 31, to use High intensity high-air-tightness compound binding agent, safety glass 31 is bonded with the aluminum alloy frame 32 for including drier, and what is be made is efficient Can heat-protecting glass.Water in integrated storage collector 2 is after the sun sets, if if cannot being incubated, will cool down soon Get off, design the glass fibre reinforced plastic insulation casing 1 of high intensity, its wall thickness coordinates double layer hollow safety glass 3, effectively up to 50~80mm Ground has completely cut off the heat exchange of integrated storage collector 2 and the external world, so as to reach the purpose of insulation.
Hollow tempered glass 3 and glass fibre reinforced plastic insulation casing 1 bonded together with one-component polyurethane sealant 4.It is single The thixotropy of part polyurethane fluid sealant 4, shrinkage are fabulous, there is splendid cementability to various base materials, oil resistant, it is water-fast, low temperature resistant, Ageing-resistant, corrosion-resistant, vibration resistance, do not go mouldy, nonpoisonous and tasteless, environmentally safe, corrosion-free to base material, pollution-free, construction party Just.Because glass, heat-insulation layer, fiberglass casing are three kinds of objects of different materials, its coefficient of thermal expansion and contraction differs certainly;Hot water Device is positioned over outdoor, exposes to the weather for a long time, if if technique for sticking treatment is bad glue will be caused to ftracture, so as to influence insulation Performance, and then cause the thermal efficiency of whole machine to reduce.Glue has preferable shrinkage in itself, and its thickness is bigger, and shrinkage is better.Two Enough positions have been reserved in the abutting edge of person, and their gap is filled up with glue, can be fine while ensuring to be bonded firm Avoid due to the coefficient of thermal expansion and contraction of material difference and cause glue ftracture leakage heat hidden danger.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims (9)

1. a kind of solar water heater, it is characterised in that:
Including glass fibre reinforced plastic insulation casing, integrated store collected device and hollow tempered glass, integrated store collected device is located at fiberglass Inside thermal-insulating body, hollow tempered glass is arranged on glass fibre reinforced plastic insulation casing top glass fibre reinforced plastic insulation box sealing;The glass Glass steel thermal-insulating body is snail wire, and its inner surface is provided with the polishing reflective aluminum mirror high of cochleoid;The integrated store collected Device is respectively arranged at two ends with water inlet and delivery port.
2. solar water heater according to claim 1, it is characterised in that:
The integrated store collected device includes heat collector and water tank, heat collector and integral tank.
3. solar water heater according to claim 2, it is characterised in that:
The integrated store collected device is made by multiple-energy-source enamel steel plate special and enamel, and its outer surface is black coating, Inner surface is enamel.
4. solar water heater according to claim 1, it is characterised in that:
The hollow tempered glass is the low iron double layer glass of tempering, and hollow tempered glass includes that two panels safety glass and aluminium are closed , be bonded together for two panels safety glass and aluminum alloy frame to form hollow by high intensity high-air-tightness compound binding agent by golden-rimmed frame Safety glass.
5. solar water heater according to claim 4, it is characterised in that:
Drier is provided with inside the aluminum alloy frame.
6. solar water heater according to claim 5, it is characterised in that:
Safety glass in the two panels safety glass positioned at upside is provided with paper self-adhesive tape at the 30mm of outside.
7. the solar water heater according to claim 1 or 6, it is characterised in that:
The wall thickness of the glass fibre reinforced plastic insulation casing is 50~80mm, and glass fibre reinforced plastic insulation casing is provided with places hollow tempered glass Plummer and outer bound edge, outer bound edge section are in " Z " type.
8. solar water heater according to claim 7, it is characterised in that:
The profile of the plummer is bigger than the outline of hollow tempered glass, and glass fibre reinforced plastic insulation casing passes through with hollow tempered glass One-component polyurethane sealant gap bonding is together.
9. solar water heater according to claim 8, it is characterised in that:
The step of gap bonding is:
A. it is first that glass fibre reinforced plastic insulation tank surface and hollow tempered glass surface cleaning is clean;
B. the one-component polyurethane sealant of black is evenly coated on the side of glass fibre reinforced plastic insulation casing with Pneumatic glue gun
C. by hollow tempered glass, the side with paper self-adhesive tape is not placed on the plummer of glass fibre reinforced plastic insulation casing, is firmly flattened, really Protecting each seam has glue;
D. filled up with one-component polyurethane sealant in seam crossing, be equably applied on hollow tempered glass, finally tear paper Adhesive tape.
CN201710097983.9A 2017-02-23 2017-02-23 A kind of solar water heater Pending CN106766250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710097983.9A CN106766250A (en) 2017-02-23 2017-02-23 A kind of solar water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710097983.9A CN106766250A (en) 2017-02-23 2017-02-23 A kind of solar water heater

Publications (1)

Publication Number Publication Date
CN106766250A true CN106766250A (en) 2017-05-31

Family

ID=58958906

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710097983.9A Pending CN106766250A (en) 2017-02-23 2017-02-23 A kind of solar water heater

Country Status (1)

Country Link
CN (1) CN106766250A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87201333U (en) * 1987-01-21 1987-10-14 山东省烟台搪瓷厂 Enamelled solar water-heating unit
CN2071312U (en) * 1989-12-13 1991-02-13 俞士忠 Hollow light-focusing solar water heater
CN1467457A (en) * 2003-03-28 2004-01-14 中国科学技术大学 Integrated solar water heater
CN2702242Y (en) * 2004-03-12 2005-05-25 王宝顺 High performance vacuum glass sheet solar water heater
CN200961959Y (en) * 2006-10-12 2007-10-17 黄锦熙 Multiple hollow movable heat-collecting board type heat-absorbing water-storing temperature-keeping integral solar energy water heater
CN201772635U (en) * 2010-05-06 2011-03-23 林学军 Shaft supporting solar water heater
CN202126096U (en) * 2011-07-08 2012-01-25 曹嘉炜 Novel solar thermal collector
CN204787346U (en) * 2015-04-28 2015-11-18 张帆 Novel flat plate collector glass laps fixed structure
CN206488477U (en) * 2017-02-23 2017-09-12 广东劲达科技发展有限公司 A kind of solar water heater

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87201333U (en) * 1987-01-21 1987-10-14 山东省烟台搪瓷厂 Enamelled solar water-heating unit
CN2071312U (en) * 1989-12-13 1991-02-13 俞士忠 Hollow light-focusing solar water heater
CN1467457A (en) * 2003-03-28 2004-01-14 中国科学技术大学 Integrated solar water heater
CN2702242Y (en) * 2004-03-12 2005-05-25 王宝顺 High performance vacuum glass sheet solar water heater
CN200961959Y (en) * 2006-10-12 2007-10-17 黄锦熙 Multiple hollow movable heat-collecting board type heat-absorbing water-storing temperature-keeping integral solar energy water heater
CN201772635U (en) * 2010-05-06 2011-03-23 林学军 Shaft supporting solar water heater
CN202126096U (en) * 2011-07-08 2012-01-25 曹嘉炜 Novel solar thermal collector
CN204787346U (en) * 2015-04-28 2015-11-18 张帆 Novel flat plate collector glass laps fixed structure
CN206488477U (en) * 2017-02-23 2017-09-12 广东劲达科技发展有限公司 A kind of solar water heater

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Application publication date: 20170531

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