CN203024437U - Air-water composite type solar energy efficient heat collection device - Google Patents
Air-water composite type solar energy efficient heat collection device Download PDFInfo
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- CN203024437U CN203024437U CN201220647848XU CN201220647848U CN203024437U CN 203024437 U CN203024437 U CN 203024437U CN 201220647848X U CN201220647848X U CN 201220647848XU CN 201220647848 U CN201220647848 U CN 201220647848U CN 203024437 U CN203024437 U CN 203024437U
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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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Abstract
The utility model relates to an air-water composite type solar energy efficient heat collection device. According to the air-water composite type solar energy efficient heat collection device, the form of a traditional plate type solar water heater is used, a pure copper heat collection plate is made of tube plate type heat collection strips in a spliced mode, a secondary pipe on the back portion of each of the heat collection strips is respectively connected with an upper main pipe and a lower main pipe, a selective coating which is high in absorptivity and low in emissivity is sprayed on the front face of the secondary pipe, meanwhile, the space between the heat collection plate and a glass cover-plate is enlarged to be taken as an air flow passage, and four pieces of glass baffles are evenly arranged to increase the time that air stays in the heat collection device and strength air disturbance in a cavity. The air-water composite type solar energy efficient heat collection device is used in an efficient air-water composite type solar energy heat collection system, hot water flows in copper pipes on the back portion of the heat collection plate, air flows in a cavity body between the heat collection plate and the glass cover-plate, and the water and the air does not interfere with each other, and thus the purposes that domestic water is heated in summer, air is heated in to achieve heating or drying in winter, and hot water and air are heated according to needs in spring are achieved, and thus annual usage rate of the heat collection rate is improved, and the problem of overheating of a solar energy air heating system in summer is resolved.
Description
Technical field
The utility model belongs to energy-saving field, is specifically related to a kind of air water complex type solar efficient heat-collecting device.
Background technology
In solar thermal utilization, solar water heater has formed industry at present, and the output of the annual solar water heater of China has reached up to ten million square metres, has again a large amount of solar energy air heat collectors to be used for drying or heating simultaneously.But in prior art, no matter be that solar water heater or solar energy air heat collector are independent use mostly, namely solar water heater can only supplying hot water, and solar energy air heat collector can only be supplied with hot-air.
In the winter time, the solar energy air heat collector heating system can satisfy the building and heating demand well, but in summer particularly in period that building need not to heat, this system not only there is no need, and can cause building overheated, and cause the annual utilization rate of system low, affected the economy of system.For problems, the way that usually adopts be in heat collector to the outdoor air port of offering, the heat of draining, but due to the greenhouse effect of glass cover-plate, also can only alleviate to a certain extent problem still can not solve the building problems of excessive heat.
Solar water heating system is simple in structure, technology maturation and cost lower, just become solar energy utilization technique worldwide with fastest developing speed and use the most general technology from beginning occurring.But it also has significant limitation: solar water heating system is when cold district is used in the winter time, and water temperature too low even system freezes and causes system effectively to use; The conventional mounting mode is installed on building roof with system, and impact not attractive in appearance building even city integral image attractive in appearance is installed, and the FRAME ON THE ROOF OF HIGH-RISE BUILDING area can't satisfy the demands etc.
Solar air-water both heat collecting device has two kinds of forms at present, a kind of is vacuum tube type, increased air circulation duct on the basis of original full glass vacuum tube solar water heater, but it can't realize adding simultaneously hot-air and water, wanting to add hot-air just must drain water, want heating water and will be converted to water to circulatory mediator by air, the operation more complicated.Another kind is plate, and its principle is similar with the Trombe wall, heat collector is hung on Nan Qiang, and open two mouths at the back upper-lower position and communicate with indoor, adopts the passive type method of operation.Its shortcoming is that equipment can only be to the south orientation room heating, but sunlight can see through the south orientation window and directly enter the room in the winter time, so the south orientation room temperature is higher than other rooms, it is not the room that needs most heating, the passive type method of operation is unreliable in addition, and air mass flow is little, and collecting efficiency is low.
The utility model content
The purpose of this utility model is to provide a kind of air water complex type solar efficient heat-collecting device, overcoming simple function solar water heater or air collector, and the above-mentioned shortcoming of existing two kinds of both heat collecting devices.
The air water complex type solar efficient heat-collecting device that the utility model proposes, comprise housing 1, thermal insulation layer 2, collecting plate 3, glass baffle plate 7, glass cover-plate 8, water inlet collector 10 and water outlet collector 4, glass cover-plate 8 is stamped in housing 1 front portion, housing 1 surrounding and back are filled with thermal insulation layer 2, be provided with collecting plate 3 between glass cover-plate 8 and thermal insulation layer 2, collecting plate 3 backs are fixed with son pipe 6, are connected with the water outlet collector with water inlet collector 10 respectively and are connected in the two ends of son pipe 6; Water inlet collector 10 is positioned at housing 1 lower end, and water outlet collector 4 is positioned at housing 1 upper end; 4 glass baffle plates 7 are staggered from top to bottom the air chamber between collecting plate 3 and glass cover-plate 8 are divided into five cavitys; The lower right-hand corner of housing 1 has air inlet 9, and place, the upper right corner has air outlet 5, and place, the lower right corner has into the water inlet of water collector 10, and left upper has the delivery port of water outlet collector 4; Air is from air inlet 9 accesss to plant, after being heated along snakelike route in air chamber from air outlet 5 bleeders; Cold water enters from water inlet collector 10, after being heated in collecting plate 3 backs pipes 6, and because the effect of density contrast enters water outlet collector 4, then bleeder.The runner of empty G﹠W does not separately interfere with each other.
In the utility model, described collecting plate 3 is spliced by several (as the 5-8 root) tube-sheet type heat-collecting strip, and the heat-collecting strip surface scribbles selective coating, the child pipe at heat-collecting strip back Shang Xia 6 two ends respectively with water inlet collector 10, water outlet collector 4 expanded joints.
In the utility model, between described housing 1 and thermal insulation layer 2, with whole double-layer plastic cloth parcel, place, equipment gap all scribbles glass cement, has good sealing effectiveness.
The application of air water complex type solar efficient heat-collecting device described in the utility model in the water combined solar thermal collection system of efficient air, this system is comprised of air water complex type solar efficient heat-collecting device 11, hot water circuit and hot gas loop, wherein: hot water circuit is comprised of air bleeding valve 13, ball-cock assembly 15, hot water storage tank 16, water circulating pump 20 and valve, and the hot gas loop is comprised of air blast pipe 22, air discharge pipe 23, axial flow blower 12 and heating space 26.The water inlet collector 10 of air water complex type solar efficient heat-collecting device 11 is connected hot water storage tank 16 by the valve 19 on check valve 21 before water pump, water circulating pump 20, circulation supply pipe road successively with pipeline, hot water storage tank 16 bottoms are provided with lets out dirty valve 18, be provided with ball-cock assembly 15 in hot water storage tank 16, hot water storage tank 16 top one sides are provided with the valve 17 on the hot water feedwater piping, opposite side is provided with valve 14 on the circulating backwater pipeline, and on the circulating backwater pipeline, valve 14 is connected water outlet collector 4 and is connected with collecting plate by pipeline; The air inlet 9 of air water complex type solar efficient heat-collecting device 11 connects air blast pipe 22, upper right quarter air outlet 5 connects discharge pipe 23, be equipped with on discharge pipe 23 axial flow blower 12 with outdoor new wind or indoor return air by air inlet 9 introducing devices that are arranged on the lower left, after new wind or return air enter air chamber and are heated along serpentine path, flow out from air discharge pipe 23, enter heating space 26.
The water combined solar thermal collection system of efficient air described in the utility model has three kinds of operational modes, is respectively: heat separately air mode, independent heating water pattern and add simultaneously hot-air and aqueous mode;
(1) heat separately air mode
Close water circulating pump 20, circulating backwater pipeline valve 14, periodical feeding pipeline valve 19, open air inlet 9, air outlet 5, open axial flow blower 12 air is drawn into air water complex type solar efficient heat-collecting device 11 from blast pipe 22, after air is heated, from discharge pipe 23 bleeders, entering needs heating or dry space 26;
(2) independent heating water pattern
Closing axle flow fan 12, air inlet 9, air outlet 5, open water circulating pump 20, circulating backwater pipeline valve 14, periodical feeding pipeline valve 19 is after hot water storage tank 16 bottom water at low temperature enter air water complex type solar efficient heat-collecting device 11, be heated gradually, after temperature raises, high-temperature water enters again hot water storage tank 16; The startup of water pump adopts the temperature difference to control, temp probe T
2And T
1Be separately positioned on gentle water combined highly-efficient solar collecting device 11 hot water exits of water tank bottom, work as T
1And T
2Between the temperature difference when reaching the capping value, water circulating pump 20 starts, and works as T
1And T
2Between the temperature difference when reaching preset lower limit, water circulating pump 20 cuts out.Rate of water make-up is controlled by the ball-cock assembly 15 in water tank, and ball-cock assembly meets user's running water place, and user's heat-obtaining water yield is controlled by valve 17 as required;
(3) add simultaneously hot-air and aqueous mode
Open simultaneously axial flow blower 12, air inlet 9, air outlet 5, and water circulating pump 20, circulating backwater pipeline valve 14, periodical feeding pipeline valve 19; Axial flow blower 12 is drawn into heat collector with air from blast pipe 22, flows out heat collector from discharge pipe 23 after air is heated, and entering needs heating or dry space 26; As air water complex type solar efficient heat-collecting device 11 outlet temperature T
1With the water tank bottom temperature T
2Between the temperature difference when reaching the capping value, water circulating pump starts, and the water at low temperature in hot water storage tank 16 is sent into air water complex type solar efficient heat-collecting device 11, and then be heated gradually, after temperature raises, high-temperature water enters again hot water storage tank 16; As air water complex type solar efficient heat-collecting device 11 outlet temperature T
1With the water tank bottom temperature T
2Between the temperature difference when reaching preset lower limit, water circulating pump 20 cuts out; The system water supplement amount is controlled automatically by ball-cock assembly 15.
The utility model combines existing plate type solar water heater and air collector principle, has increased the air circulation path on the basis of plate type solar water heater.When needs heating or drying, can open air circulation mode, outdoor new wind or indoor return air are introduced air water complex type solar efficient heat-collecting device 11, delivering to after heating needs heating or dry space, reaches heating or dry purpose.When there is no the heating demand summer, can open the models of hydrothermal circulation, make the water in hot water storage tank maintain suitable temperature, satisfy the hot water for life demand.When the heating demand in spring, autumn is little, can open simultaneously as required hot water, two kinds of patterns of hot-air or a kind of pattern wherein, both can satisfy the building and heating demand also can provide hot water for life.Open hot air circulate pattern when needing heating winter, satisfies the building and heating demand.When summer during hot water storage tank 16 interior water temperature over-high; the operating temperature of heat collector is too high; can produce harm to installing itself, reduce device lifetime, at this moment; can be with discharge pipe 23 towards outdoor unlatching; open air inlet 9, then open axial flow blower 12, the high temperature air in device is discharged; reduce the operating temperature of device, device is protected.
The utility model air water complex type solar efficient heat-collecting device has overcome the shortcoming of conventional solar boilers and solar energy air heat collector function singleness, not only can add simultaneously hot-air and water, and air and water flow passage separately be independent of each other, and its advantage is:
(1) this heat collector has been set up glass baffle plate between collecting plate and glass cover-plate, can strengthen air agitation, increase the residence time of air in heat collector, improved the heat exchange efficiency when adding hot-air, the air space of thickening can form greenhouse effects simultaneously, has solved vacuum tube water heater system in the winter problem that freezes.
(2) how many costs this heat collector on the basis of flat-plate solar heat collector, does not increase, and but can realize the economic benefits and social benefits running, the annual utilization rate of raising equipment and investment repayment speed, and solved solar air heating system over-heating in summer and idle problem.
(3) when summer heat collector operating temperature too high, can itself produce harm to installing, reduce device lifetime, at this moment, can utilize axial flow blower 12, the high temperature air in device is discharged to outdoor, reduce the operating temperature of device, device is protected.
(4) this heat collector adopts solar water heater parts, mature production technology, and the easily marketization, simultaneously, flat plate collector easily and Integration of building is conducive to the few occasion of this roof area of high residential building and uses.
(5) user can carry out multiple devices the series and parallel combination as required, connects very convenient between each heat collector.
Description of drawings
Fig. 1 is the structure chart of air water complex type solar efficient heat-collecting device.Wherein: (a) being front view, is (b) left view.
Fig. 2 is the operation logic figure of air water complex type solar efficient heat-collecting device.
Fig. 3 is the water combined solar thermal collection system figure of efficient air.
number in the figure: 1 is housing, 2 is thermal insulation layer, 3 is collecting plate, 4 are the water outlet collector, 5 is air outlet, 6 is the sub-pipe in collecting plate back, 7 is glass baffle plate, 8 is glass cover-plate, 9 is air inlet, 10 are the water inlet collector, 11 is air water complex type solar efficient heat-collecting device, 12 is axial flow blower, 13 is air bleeding valve, 14 is valve on the circulating backwater pipeline, 15 is water tank inner float ball valve, 16 is hot water storage tank, valve on 17 hot water feedwater pipings, 18 for letting out dirty valve, 19 is the valve on the circulation supply pipe road, 20 is water circulating pump, 21 is check valve before water pump, 22 is the air blast pipe, 23 is the air discharge pipe, 24 is valve on discharge pipe, 25 is valve on blast pipe, 26 are the heating space.
The specific embodiment
Further describe by reference to the accompanying drawings the utility model below by example.
As shown in Figure 1, the described air water complex type solar of this utility model efficient heat-collecting device housing 1 is of a size of 2.1m * 1.1m * 0.15m.Surrounding and bottom are filled the 4mm XPS and are used for being incubated as thermal insulation layer 2, then cover board-like collecting plate 3 in the above.This collecting plate 3 is made by copper-evanohm, and face coat is black chromium, and its absorptivity is up to 97%(± 2%), and its emissivity only has 10%(± 2%).Collecting plate 3 is spliced by 7 wide 0.14m heat-collecting strips of long 2m, the heat-collecting strip back adopt ultrasonic bonding be welded with diameter be the copper tube of 12mm as child pipe 6, every root pipe 6 is 20mm with two of up and down diameter respectively water inlet collector 10 is connected with water outlet collector 4.Between housing 1 and thermal insulation layer 2, with whole double-layer plastic cloth parcel, place, equipment gap all scribbles glass cement, has good sealing effectiveness.Air chamber between collecting plate 3 and glass cover-plate 8 is of a size of 2 m * 1 m * 0.1 m, and 4 glass baffle plates 7 are established as flow-stopping plate in inside, and length is 0.7 m, is staggered from bottom to top, is partitioned into 5 heat collector cavities.Glass cover-plate 8 adopts individual layer safety glass, has shortwave, the characteristic of the infrared long wave of resistance.Place, upper and lower diagonal angle at device has respectively air outlet 5 and the air inlet 9 that diameter is 75 mm.
As shown in Figure 2, this device is used for the water combined solar thermal collection system of efficient air, the water combined solar thermal collection system of this efficient air is made of hot water circuit and hot-air loop.The water inlet collector 10 of device connects hot water storage tanks 16 by the valve 19 on check valve 21 before water pump, water circulating pump 20, circulation supply pipe road, hot water storage tank 16 bottoms are provided with lets out dirty valve 18, be provided with ball-cock assembly 15 in hot water storage tank 16, hot water storage tank 16 top one sides are provided with the valve 17 on the hot water feedwater piping, opposite side is provided with valve 14 on the circulating backwater pipeline, and on the circulating backwater pipeline, valve 14 connects by the water outlet collector 4 of the gentle water combined highly-efficient solar collecting device 11 of pipeline.The air inlet 9 of device connects air blast pipe 22, upper right quarter air outlet 5 connects discharge pipe 23, axial flow blower 12 is housed on discharge pipe 23 outdoor new wind or indoor return air are introduced this device by the air inlet 9 that is arranged on the lower left, flow out from air discharge pipe 23 after air is heated along the serpentine path access to plant.Wherein:
Hot water circuit comprises valve 14, valve 17, valve 19 and the valve 21 on the water combined highly-efficient solar collecting device 11 of Novel air, air bleeding valve 13, ball-cock assembly 15, hot water storage tank 16, water circulating pump 20 and each pipeline.As device exit hot water temperature T
1With the water tank bottom water temperature T
2Between the temperature difference when reaching capping, starting mode of pump, hot water storage tank bottom water at low temperature is sent to air water complex type solar efficient heat-collecting device 11 lower collector pipe through circulation supply pipe, enter air water complex type solar efficient heat-collecting device 11 upper headers after water at low temperature is heated, hot water enters hot water storage tank through circulation supply pipe.As air water complex type solar efficient heat-collecting device 11 exit hot water temperature T
1With the water tank bottom water temperature T
2Between the temperature difference reach and set in limited time down, water pump cuts out.In water tank, hot water is sent to the user place through the hot water feed pipe, and water withdrawal is controlled by valve 17, and when water level in water tank descended, ball-cock assembly 15 was opened, and running water enters in hot water storage tank through filling pipe.
The hot-air loop comprises the water combined highly-efficient solar collecting device 11 of Novel air, air blast pipe 22, air discharge pipe 23 and axial flow blower 12.Lower than when setting value, fan starting is drawn into heat collector with room air or outdoor air through blast pipe 22 when indoor temperature, air is along snakelike path flows to when outlet, temperature raises, and high temperature air enters indoor through ajutage 23, reach heating or drying purpose.
The water combined solar thermal collection system of this efficient air has three kinds of operational modes, is respectively: heat separately air mode, the heating water pattern, add hot-air and aqueous mode simultaneously separately.
(1) heat separately air mode
Close water circulating pump 20, circulating backwater pipeline valve 14, periodical feeding pipeline valve 19, device for opening air inlet 9, air outlet 5, open axial flow blower 12 air is drawn into air water complex type solar efficient heat-collecting device 11 from blast pipe 22, after air is heated, from discharge pipe 23 bleeders, entering needs heating or dry space 26.
(2) independent heating water pattern
Closing axle flow fan 12, air water complex type solar efficient heat-collecting device 11 air inlets 9, air outlet 5, open water circulating pump 20, circulating backwater pipeline valve 14, periodical feeding pipeline valve 19, after hot water storage tank 16 bottom water at low temperature enter air water complex type solar efficient heat-collecting device 11, be heated gradually, after temperature raises, high-temperature water enters again hot water storage tank 16.The startup of water pump adopts the temperature difference to control, temp probe T
2And T
1Be separately positioned on water tank bottom and hot water exit, work as T
1And T
2Between the temperature difference when reaching the capping value, water circulating pump 20 starts, and works as T
1And T
2Between the temperature difference when reaching preset lower limit, water circulating pump 20 cuts out.Rate of water make-up is controlled by the ball-cock assembly 15 in water tank, and ball-cock assembly meets user's running water place, and user's heat-obtaining water yield is controlled by valve 17 as required.
(3) add simultaneously hot-air and aqueous mode
Open simultaneously axial flow blower 12, air inlet 9, air outlet 5, and water circulating pump 20, circulating backwater pipeline valve 14, periodical feeding pipeline valve 19.Axial flow blower 12 is drawn into heat collector with air from blast pipe 22, flows out heat collector from discharge pipe 23 after air is heated, and entering needs heating or dry space 26.As air water complex type solar efficient heat-collecting device 11 outlet temperature T
1With the water tank bottom temperature T
2Between the temperature difference when reaching the capping value, water circulating pump 20 starts, and the water at low temperature in hot water storage tank 16 is sent into air water complex type solar efficient heat-collecting device 11, and then be heated gradually, after temperature raises, high-temperature water enters again hot water storage tank 16.As air water complex type solar efficient heat-collecting device 11 outlet temperature T
1With the water tank bottom temperature T
2Between the temperature difference when reaching preset lower limit, water circulating pump 20 cuts out.The system water supplement amount is controlled automatically by ball-cock assembly 15.
Claims (3)
1. air water complex type solar efficient heat-collecting device, comprise housing (1), thermal insulation layer (2), collecting plate (3), glass baffle plate (7), glass cover-plate (8), water inlet collector (10) and water outlet collector (4), it is characterized in that housing (1) front portion is stamped glass cover-plate (8), housing (1) surrounding and back are filled with thermal insulation layer (2), be provided with collecting plate (3) between glass cover-plate (8) and thermal insulation layer (2), collecting plate (3) back is fixed with son pipe (6), the two ends of son pipe (6) are connected 4 with water inlet collector (10) with the water outlet collector respectively) be connected, water inlet collector (10) is positioned at housing (1) lower end, and water outlet collector (4) is positioned at housing (1) upper end, 4 glass baffle plates (7) air chamber that will be positioned between collecting plate (3) and glass cover-plate (8) that is staggered from top to bottom is divided into five cavitys, the lower right-hand corner of housing (1) has air inlet (9), and place, the upper right corner has air outlet (5), and place, the lower right corner has into the water inlet of water collector (10), and left upper has the delivery port of water outlet collector (4), air enters from air inlet (9), flows out from air outlet (5) after being heated along snakelike route in air chamber, cold water enters from water inlet collector (10), after being heated in collecting plate (3) back son pipe (6), because the effect of density contrast enters water outlet collector (4).
2. air water complex type solar efficient heat-collecting device according to claim 1, it is characterized in that collecting plate (3) is spliced by the board-like heat-collecting strip of plurality of tubes, the heat-collecting strip surface scribbles selective coating, the two ends, child pipe (6) up and down at heat-collecting strip back respectively with water inlet collector (10), water outlet collector (4) expanded joint.
3. air water complex type solar efficient heat-collecting device according to claim 1, with whole double-layer plastic cloth parcel, install the place, gap and all scribble glass cement between housing (1) and thermal insulation layer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220647848XU CN203024437U (en) | 2012-11-30 | 2012-11-30 | Air-water composite type solar energy efficient heat collection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220647848XU CN203024437U (en) | 2012-11-30 | 2012-11-30 | Air-water composite type solar energy efficient heat collection device |
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| Publication Number | Publication Date |
|---|---|
| CN203024437U true CN203024437U (en) | 2013-06-26 |
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| CN201220647848XU Expired - Fee Related CN203024437U (en) | 2012-11-30 | 2012-11-30 | Air-water composite type solar energy efficient heat collection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574916A (en) * | 2013-11-29 | 2014-02-12 | 兰州理工大学 | Multi-medium solar heat collection auxiliary heat pump system |
| CN103615776A (en) * | 2013-11-25 | 2014-03-05 | 陈蜀乔 | Solar cell heating panel water filter air conditioning system for swimming pool |
| CN104913524A (en) * | 2015-06-30 | 2015-09-16 | 周建 | Dual-heating type flat-plate solar collector |
-
2012
- 2012-11-30 CN CN201220647848XU patent/CN203024437U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615776A (en) * | 2013-11-25 | 2014-03-05 | 陈蜀乔 | Solar cell heating panel water filter air conditioning system for swimming pool |
| CN103615776B (en) * | 2013-11-25 | 2021-11-09 | 蔚蓝计划(北京)科技有限公司 | Swimming pool solar cell heating plate water filtering air conditioning system |
| CN103574916A (en) * | 2013-11-29 | 2014-02-12 | 兰州理工大学 | Multi-medium solar heat collection auxiliary heat pump system |
| CN103574916B (en) * | 2013-11-29 | 2018-09-21 | 兰州理工大学 | Multimedium solar energy heating assisted heat pump system |
| CN104913524A (en) * | 2015-06-30 | 2015-09-16 | 周建 | Dual-heating type flat-plate solar collector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20151130 |
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| EXPY | Termination of patent right or utility model |