A kind of bubbling type solar thermal collector and solar water heaterTechnical field
The present invention relates to field of solar energy, and in particular to a kind of bubbling type solar thermal collector and solar water heater.
Background technology
Since oil price is unstable and the limitation etc. of climate change agreement, the importance of new regenerative resource become larger.It can be againThe raw energy includes solar heat, sunlight, biomass energy, wind-force, small power station, underground heat, ocean energy and waste energy etc., and new energySource includes fuel cell, liquefaction coal, gasification coal and Hydrogen Energy.Problem is sent out from new regenerative resource, particularly sunlightThe cost of electricity is not up to the power grid par for the cost for being equal to traditional thermal power generation using fossil fuel.But with technologyProgress is persistently reduced from the solar thermal power generation of the solar thermal power generation in new regenerative resource in cost of electricity-generating, andGenerating efficiency is being gradually increased.
Solar energy is converted into thermal energy and relies primarily on heat collector.At present solar thermal collector mainly have vacuum tube collector,Three kinds of heat pipe collector and vacuum flat plate collector.
The solar thermal collector of existing domestic solar water heater, during flowing in evacuated collector tube by waterHeat is absorbed, since evacuated collector tube is cylindrical-shaped structure, the solar energy irradiation in each face is uneven, therefore, causes at itThe uneven heating of the medium water of interior flowing is even, causes finally storage uneven to the coolant-temperature gage in boiler, there are portion temperaturesTherefore inadequate relatively cold water be easy to cause hot water temperature and does not reach requirement, and in winter, environment temperature is relatively low, general in the northAll over environment temperature in subzero, since the evacuated collector tube of solar thermal collector is arranged at outdoor, then vacuum heat-collecting tube capacityEasy bursting by freezing causes flow to lose and becomes ice, is further exacerbated by bursting by freezing, causes vicious circle, therefore, existing solar thermal collectorThere are the risk of bursting by freezing, safety is relatively low.
Invention content
The purpose of the present invention is that be lacked to solve the non-uniform technology of evacuated collector tube thermal-arrest of solar thermal collectorIt falls into, a kind of bubbling type solar thermal collector is provided, to meet the growing expectation to good life of people.
To achieve the above object, the present invention provides following technical schemes：
A kind of bubbling type solar thermal collector provided by the invention, which is characterized in that the solar thermal collector includes frameFrame and be arranged in the frame more side by side parallel arrangement solar vacuum heat-collecting pipe, the frame include top plate,Bottom plate and the side plate of both sides, it is corresponding with being provided on bottom plate for across the solar energy vacuum heat collecting in the top plateThe jack of pipe is provided with and the matched sleeve gasket of the solar vacuum heat-collecting pipe in each described jack；
The each solar vacuum heat-collecting pipe includes outer glass pipe and inner metal tube, in the outer glass pipe and instituteIt states and forms vacuum interlayer between inner metal tube, the both ends sealing of the outer glass pipe is welded on the both ends side wall of the inner metal tubeOn, the entrance of each solar vacuum heat-collecting pipe is located at lower end, and outlet is located at upper end, the axis in the inner metal tubeLine position is provided with bubbler, the bubbler include the air main pipe being arranged along the axis direction of the inner metal tube andMultiple air branch pipes in the air main pipe are set, multiple air branch pipes on air main pipe outer surface with instituteIt states and arranges and circularize on the perpendicular section of length direction of air main pipe, form multiple annular air Zhi Guanhuan, multiple annularsThe spacing of air branch pipe ring is first tapered on the length direction along the air main pipe and is become larger afterwards；
The air main pipe includes air intlet and multiple air outlet slits, and the lower end of the air main pipe is unclosed, instituteThe lower end that air intlet is located at the air main pipe, the upper end closed of the air main pipe are stated, multiple air outlet slits are located atIn the outside wall surface of the air main pipe, and it is connected respectively with the entrance of the air branch pipe, each described air branch pipe is in"T"-shaped, the entrance of the air branch pipe is located at the bottom surface of the "T"-shaped air branch pipe, and the outlet of the air branch pipe is located atThe upper top surface of the "T"-shaped air branch pipe, and multiple outlets equally arrange on the upper top surface, each described airThe outlet of branch pipe is nozzle type, and the outlet of the air branch pipe has fold shape outer edge；The nozzle type outlet is taperedThe cross section of nozzle, one end of the entrance of the connection air branch pipe of the negative throat noz(zle) is more than the outlet of the air branch pipeCross section；
Having heaters is set in the import of the air main pipe, cold air enters after becoming hot-air by the heaterThe air intlet, and distribute to each air branch pipe along the air main pipe.
Preferably, the heater is electric heater, and electric heating wire is arranged in the electric heater.
Preferably, the fold shape outer edge is annulus fin shape outer edge or straight ribbed outer edge.
Preferably, the entrance of the "T"-shaped air branch pipe is that arc-shaped transition is connect with air main pipe junction.
Preferably, the solar thermal collector is for further including cold water storage cistern, boiler and branch in solar water heaterFrame, on the bracket, the cold water storage cistern is located at the lower end of the holder, the heat for the frame setting of the solar thermal collectorWater tank is located at the upper end of the holder, and the entrance of the solar vacuum heat-collecting pipe of the solar thermal collector connects the cold waterThe outlet of case, the solar vacuum heat-collecting pipe connects the boiler.
Advantageous effect is：
(1) air main pipe and air branch are provided in the inner metal tube of each solar vacuum heat-collecting pipePipe so that the hot-air after heating is injected directly into the inner metal tube, and the medium water in it is heated and disturbedStream so that the medium water in it is uniformly mixed, and the temperature for carrying on the back positive side and day side is uniform, meanwhile, hot-air can be with mediumWater directly mixes, and is directly heated to water, improves its efficiency of heating surface；
(2) outlet edge of each air branch pipe is provided with fold shape outer edge, on the one hand, by the way that fold is arrangedShape outer edge so that when medium water flows through the fold shape outer edge, can fold shape outer edge be set by flow-disturbing, on the other hand,When hot-air is sprayed via the outlet, it is easily formed bubble, improves its bubbling type, and the flow-disturbing of bubble shape air is with obvious effects,Its efficiency of heating surface can be further increased.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show belowThere is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only thisSome embodiments of invention for those of ordinary skill in the art without creative efforts, can be withObtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the solar thermal collector of the present invention；
Fig. 2 is the structural schematic diagram of any solar vacuum heat-collecting pipe of the present invention；
Fig. 3 is the structural schematic diagram of the air main pipe and air branch pipe of the present invention；
Fig. 4 is the schematic cross-section of the bubbler of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, technical scheme of the present invention will be carried out belowDetailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.BaseEmbodiment in the present invention, those of ordinary skill in the art are obtained all without making creative workOther embodiment belongs to the range that the present invention is protected.
Shown in Fig. 1-Fig. 4, a kind of bubbling type solar thermal collector provided by the invention, which is characterized in that it is described tooPositive energy heat collector includes frame 1 and the solar vacuum heat-collecting pipe of more side by side parallel being arranged in the frame 1 arrangement2, the frame 1 includes the side plate 5 of top plate 3, bottom plate 4 and both sides, corresponding with being provided on bottom plate 4 in the top plate 3For the jack 6 across the solar vacuum heat-collecting pipe 2, it is provided in each described jack 6 true with the solar energy2 matched sleeve gasket (not shown) of empty set heat pipe；
The each solar vacuum heat-collecting pipe 2 includes outer glass pipe 7 and inner metal tube 8, in the outer glass pipe 7Vacuum interlayer 9 is formed between the inner metal tube 8, the both ends sealing of the outer glass pipe 7 is welded on the inner metal tube 8On the side wall of both ends, the entrance of each solar vacuum heat-collecting pipe 2 is located at lower end, and outlet is located at upper end, in the interior goldThe axial location belonged in pipe 8 is provided with bubbler, and the bubbler includes being arranged along the axis direction of the inner metal tube 8Air main pipe 10 and the multiple air branch pipes 11 being arranged in the air main pipe 10, multiple air branch pipes 11 are describedIt arranges and circularizes on the section perpendicular with the length direction of the air main pipe 10 on 10 outer surface of air main pipe, formed multipleThe spacing of annular air Zhi Guanhuan, multiple annular air Zhi Guanhuan are along first gradually change on the length direction of the air main pipe 10It is become larger after small；
The air main pipe 10 includes air intlet and multiple air outlet slits, and the lower end of the air main pipe is unclosed,The air intlet is located at the lower end of the air main pipe, the upper end closed of the air main pipe, multiple air outlet slit positionsIn in the outside wall surface of the air main pipe, and it is connected respectively with the entrance of the air branch pipe 11, each described air branchPipe 11 is " T " shape, and the entrance of the air branch pipe 11 is located at the bottom surface of the "T"-shaped air branch pipe 11, the air branch pipe11 outlet is positioned at the upper top surface of the "T"-shaped air branch pipe 11, and multiple outlets equally arrange on the upper top surface,The outlet of each air branch pipe 11 is nozzle type, and the outlet of the air branch pipe has fold shape outer edge；It is describedNozzle type outlet is negative throat noz(zle), and the cross section of one end of the entrance of the connection air branch pipe of the negative throat noz(zle) is more than instituteState the cross section of the outlet of air branch pipe；
Having heaters 12 is set in the import of the air main pipe 10, cold air becomes hot-air by the heater 12Enter the air intlet afterwards, and each air branch pipe 11 is distributed to along the air main pipe 10.
Preferably, the heater is electric heater, and electric heating wire is arranged in the electric heater.
Preferably, the fold shape outer edge is annulus fin shape outer edge or straight ribbed outer edge.
Preferably, the entrance of the "T"-shaped air branch pipe is that arc-shaped transition is connect with air main pipe junction.
Preferably, the solar thermal collector is for further including cold water storage cistern, boiler and branch in solar water heaterFrame, on the bracket, the cold water storage cistern is located at the lower end of the holder, the heat for the frame setting of the solar thermal collectorWater tank is located at the upper end of the holder, and the entrance of the solar vacuum heat-collecting pipe of the solar thermal collector connects the cold waterThe outlet of case, the solar vacuum heat-collecting pipe connects the boiler.
Specific work process：On startup, the cold water is pumped into each solar energy evacuated collection from the cold water storage cisternIn heat pipe, the bottom-up flowing in the solar vacuum heat-collecting pipe constantly absorbs solar heat during flowingAmount, temperature constantly increase；Meanwhile the electric heater starts, cold air is being pumped to the air main pipe by importIt is electrically heated device heating in the process, the hot-air after heating is evenly distributed to along the bottom-up flowing of air main pipeIn air intake in each air branch pipe, after hot-air enters air intake, flowed along the air branch pipe, and finalIt is constantly sprayed into the inner metal tube by the air outlet slit and air nozzle, constantly heats and disturb in describedMedium water in metal tube improves its temperature and being heated evenly property.
Advantageous effect is：
(1) air main pipe and air branch are provided in the inner metal tube of each solar vacuum heat-collecting pipePipe so that the hot-air after heating is injected directly into the inner metal tube, and the medium water in it is heated and disturbedStream so that the medium water in it is uniformly mixed, and the temperature for carrying on the back positive side and day side is uniform, meanwhile, hot-air can be with mediumWater directly mixes, and is directly heated to water, improves its efficiency of heating surface；
(2) outlet edge of each air branch pipe is provided with fold shape outer edge, on the one hand, by the way that fold is arrangedShape outer edge so that when medium water flows through the fold shape outer edge, can fold shape outer edge be set by flow-disturbing, on the other hand,When hot-air is sprayed via the outlet, it is easily formed bubble, improves its bubbling type, and the flow-disturbing of bubble shape air is with obvious effects,Its efficiency of heating surface can be further increased.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, anyThose familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all containLid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.