CN85200928U

CN85200928U - Solar air collector with half-honeycombing and double back-flow

Info

Publication number: CN85200928U
Application number: CN198585200928U
Authority: CN
Inventors: 宋可生
Original assignee: Shaanxi Normal University
Current assignee: Shaanxi Normal University
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1986-07-02

Abstract

The utility model discloses a solar air collector with half-honeycomb and double back-flow, belonging to a solar air heat collector. The absorber plate body of the utility model is composed of three layers of plate bodies which are lapped and arranged, two layers of half-honeycomb air passages are formed by the three layers of plate bodies, and an air circulation passage is arranged in the lower end of the absorber plate body. The solar air heat collector of the absorber plate body has the advantages of high photo-thermal conversion efficiency, simple structure and convenient processing simultaneously, and the utility model is favorable for being popularized and applied in the aspects, such as the ventilation heat supply, a heating air conditioner, the drying, the solar energy glass culture, the cultivation, etc.

Description

Half honeycomb dual reflux solar energy air heat collector

This utility model relates to solar thermal collector.

Solar energy air heat collector, by absorber plate the solar radiation electromagnetic energy is converted to heat energy, heat convection by absorber plate and air, air heat is arrived predetermined temperature for utilization, air working medium can obtain solar electromagnetic radiation energy as much as possible in heat transfer process, realize high efficiency photo-thermal conversion.

Solar energy air heat collector has dull and stereotyped cavity type now, and porous is drawn in the net polytypes such as type, plate sour jujube type.Though dull and stereotyped cavity type air collector is simple in structure, is convenient to processing and manufacturing, heat exchange is abundant inadequately; Though it is simple in structure to draw in the net the type air collector, heat exchange is abundant, and it is insufficient to absorb heat; Plate sour jujube type air collector, heat exchange property is good, but makes more complicated.

The purpose of this utility model is that the heat absorption plate body to existing solar energy air heat collector improves, and provides a kind of simple in structure, be convenient to produce, and the high solar energy air heat collector of photo-thermal conversion efficiency.

The utility model has been to take into full account all little character of density, specific heat and thermal conductivity of heat collector working medium air, and joule--Thomson effect provides a kind of half honeycomb dual reflux solar energy air heat collector according to air negative.Under normal temperature condition, the phenomenon that air has the throttling expansion cooling takes place, utilize this physical characteristic of air, expansion process and throttling process are provided in the course of the work in collector arrangement, for its working medium air, make air in the whole process of throttling expansion, obtain more in energy, reach the purpose that adds hot-air.

The existing air collector of structure fundamental sum of half honeycomb dual reflux solar energy air heat collector of the present utility model is similar, and cover plate, heat absorption plate body, insulation material and shell are arranged.It is characterized in that the plate body that absorbs heat, with material (as iron sheet, the aluminium skin etc.) press forming of certain thickness good heat-transfer is the trapezoidal conduit of certain depth (being generally 3-5mm) and width (being generally 10-30mm), can equidistantly evenly distribute between conduit, form the plate body layer.The heat absorption plate body by vertical and horizontal alternate stacked the forming of its trapezoidal conduit, can make upper strata and lower floor be vertically arrangement by three ply board body layer, and central dividing plate body layer is laterally arrangement.Formed the double-deck air passage in the heat absorption plate body of making like this, the cross section of every layer of air passage longitudinally size changes suddenly.Like this when flowing in the passage of working medium air at every layer, when by the little channel section in cross section, because channel cross-section dwindles suddenly, air carries out throttling process, and flowing velocity sharply increases; When by the big channel section in cross section, because the channel cross-section sudden enlargement, air carries out expansion process.Realize joule--the Thomson effect that it is negative by this flow process of air.When air flows in passage, suppose the variation of when throttling, having only speed to increase, and very of short duration in the time of secondary segment passage, have little time to carry out heat exchange with the external world, when expanding, in cooling, carry out heat convection with absorber plate again, temperature is improved.Heated air, lower the temperature through throttling expansion, air heats once more through absorber plate again, and the air that is heated once more is through throttling expansion, make alternately repeatedly the throttling expansion in the heat absorption plate body of working medium air like this, realize making the temperature of air constantly to increase.

The heat absorption plate body of being made up of the double-deck air passage of the present utility model, on air intake and the outlet difference lower body layer and upper plate body layer in the top, the plate body layer is shorter slightly than upper and lower plate body layer in the lower end of heat absorption plate body, leaves the return flow line that air refluxes.Air pressure in the Temperature Distribution of this heat absorption plate body and its passage distributes and has formed temperature gradient field and barometric gradient field, by the inlet of air through the return flow line to outlet, temperature constantly rises, air pressure constantly reduces, so in the heat absorption plate body, working medium is to move under negative pressure, the internal factor of the interior air current flow of absorber plate that Here it is.Air in the course of the work, at first flow into each passage of lower floor by heat absorption plate body inlet, through throttling expansion repeatedly, enter upper strata each passage to the lower end of heat absorption plate body by the return flow line with middle level and lower floor's plate body layer heat exchange, the throttling expansion of same process repeatedly, with upper strata and middle level plate body layer heat exchange upper end, reach operating temperature and flow out from outlet to the heat absorption plate body.From as can be seen above-mentioned, absorber plate bulk absorption solar energy passes through the heat convection of heat absorption plate body and air and the temperature of air is constantly risen, thereby has realized the photo-thermal conversion.The operation principle of Here it is half honeycomb dual reflux air collector.

Structural design of the present utility model has taken into full account the physical property of working medium air and the geometry of structure, has accomplished both dialectical unities, and this just makes it compare with existing air collector to have possessed following two advantages simultaneously:

1. because the absorber plate physical efficiency of the solar energy air heat collector of this structure makes full use of the inhomogeneities of absorber plate Temperature Distribution, the lower zone of temperature is finished the preheating of air process, and the heating process after the preheating is finished in the higher zone of temperature, reduced the temperature of heat absorption plate body, reduced radiation loss, given full play to the heat effect of high-temperature region, overcome the low shortcoming of air thermal conductivity, so this half honeycomb dual reflux air collector photo-thermal conversion efficiency is higher.

2. simple in structure, be convenient to processing, be suitable for producing in batches.

Because the utility model possesses above-mentioned two advantages simultaneously, institute is so that application.It can be used for ventilating heat supply, heating air conditioning, drying and aspects such as solar energy greenhouse cultivation and breed.

Fig. 1 is the schematic cross section of half honeycomb dual reflux solar energy air heat collector.

Fig. 2 is the schematic cross section of return flow line in the heat absorption plate body lower end.

Fig. 3 is the vertical section schematic diagram of half honeycomb dual reflux solar energy air heat collector.

Processing of the present utility model can be adopted the roll forming welding procedure.The iron sheet that the 0.2mm left and right sides is thick (or aluminium skin) is rolled into the dark 3-5mm that is, wide is the trapezoidal conduit of a lot of of 10-30mm, and the conduit spacing is 10-30mm, forms the plate body layer.Use again welding procedure with the three ply board body stacked put around the seam be welded into the heat absorption plate body (2).During the seam weldering, the trapezoidal conduit of upper plate body layer (5) and lower body layer (7) longitudinally welds, middle plate body layer (6) is along transverse weld, the lower end of heat absorption plate body (2), in plate body layer (6) shorter than upper plate body layer (5) and lower body layer (7), and this end only stitch burn-on, the lower body layer, middle plate body layer and stitch the gap that weldering place leaves 15mm, to form the return flow line (8) of air, the upper end of upper plate body layer (5) and lower body layer (7) is left exit port (9), (10) of air respectively.So just constitute the heat absorption plate body (2) of half honeycomb dual reflux.

With successively pack into the shell (3) of air collector of insulation material (4) and heat absorption plate body (2), upper cover upper cover plate (1) glass promptly becomes half honeycomb dual reflux solar energy air heat collector.

Claims

1, a kind of half honeycomb dual reflux solar energy air heat collector, by shell (3), insulation material (4), cover plate (1) and heat absorption plate body (2) are formed, it is characterized in that said heat absorption plate body (2) is by upper plate body layer (5), middle plate body layer (6) and lower body layer (7) are formed, every laminate body layer all is that to make a lot of by the material of the good heat-transfer of 0.1-0.5mm thickness parallel, spacing is 10-30mm, the degree of depth is 3-5mm, wide trapezoidal conduit for 10-30mm forms, three ply board body layer is vertical and laterally alternate stacked by its trapezoidal conduit, the lower end of heat absorption plate body is provided with air return flow line (8), leaves the import and export (10) of air on the lower body layer (7) of upper end and the upper plate body layer (5) respectively, (9).