CN2255020Y - Flat core of solar water heater - Google Patents

Abstract

The utility model relates to a plate core for a solar water heater. The utility model is mainly characterized in that the structure is changed; a thin hollow cavity is composed of a front metal plate and a back metal plate which are connected through regular spot welding or regular wire welding; heat collecting power and heat collecting efficiency are improved through the technical measures of enlarging heat conduction area and shortening a heat conduction distance. The utility model which has the advantages of simple production process, easy production, low tool investment, easy purchase for raw material, little occupied capital, low synthetic cost per unit, and stochastic merchandise purchase is favorable to the popularization of a solar water heater with high efficient.

Description

A kind of plate core of solar water heater

The utility model relates to a kind of solar facilities, particularly a kind of solar water heater.

In the prior art, the solar water heater plate core of common solarization template has two kinds on the market, a kind of is to be welded into the metal pipe frame that interconnects with metal tube, cover the laths of metal of top pass as the daylighting absorber along metal tube then, lath and metal tube are not one because of absorbing heat, there is air layer the centre, and heat conduction efficiency is poor.The plate core that another kind has improved, be by double-level-metal lath pressing one, the centre in a tubular form, form a daylighting heat absorbing units, the heat absorbing units of several such certain-lengths is communicated with circulating water pipe, just constitute a plate core, Fig. 1 is its schematic diagram that cuts, during heat transferred water that the daylighting heat absorbing units of this plate core absorbs, conduction distance far (60 millimeters at general edge) to the center, average conduction is apart from about 30 millimeters; Still very thin after the dual metallic plate pressing, about below 0.5 millimeter, so heat conducting area is very little; Producer selects aluminium or copper material for use, is to utilize the high thermal conductivity factor of material to improve heat conducting efficient, but has also correspondingly improved product cost; Say that again the equipment and technology that the pressing laths of metal needs requires high, investment is big, is unfavorable for that this water heater popularizes.

The purpose of this utility model is the plate core of the solar water heater that overcomes a kind of efficient height that the said goods defective designs, easily make just.Determine the several factors that has of hot conducted power in fact, it and long-pending being directly proportional of thermal conductivity factor, heat transfer area, conduction inverse distance, the temperature difference of material, certain at the daylighting endotherm area, under the material same case, by enlarging heat-conducting area, shortening heat conduction distance, guarantee circulation (the raising temperature difference), can further improve the thermal efficiency of heat-collecting plate core.

The technical solution of the utility model, the double layer of metal plate is superimposed, a transversal tubular groove is bent in the bottom, the line of rabbet joint of tubular channel is communicated with the cavity that preceding metallic plate and back metallic plate are formed, a transverse groove is rolled at top at preceding metallic plate or back metallic plate, two metallic plates are at edge flanging snapping and welded seal, form a thin cavity, point or line by certain density between two metallic plates of front and back carry out means of spot welds or line welding, preceding metallic plate is coated the selective light absorbing coating of black, constitutes daylighting, heat absorption, heat transfer system.Like this, can be full of a thin water layer between two metallic plates, the area of whole preceding metallic plate is to be subjected to the light endotherm area, is again the area to the heat transfer water amount, and the thickness of preceding metallic plate then just is heat conducting distance.Tubular channel one end communication loop down pipe, the circulation ascending tube is drawn communicatively between two plates in two metallic plates upper end, constitutes water circulation system.

In addition, when two metallic plates carry out the welding of means of spot welds or line with mash welder or seam welder, should be in the middle of two plates of desiring the welding position before the weldering or lateral surface, add the sheet or the lath-shaped metal promoted weld pad of iron, galvanized iron sheet, copper.

The effect of this utility model.Because heat conduction average distance shortens more than five times, heat conducting enlarged areas tens of times, so with same daylighting area, same material, coating of the same race, the good existing plate core of circulation are compared, power has improved manyfold, this is that prior art can not be compared.Even all with galvanized sheet or tin plate manufacturing, effect is also very desirable.During manufacturing, only need mash welder or seam welder and small instruments and tools, technology is simple, and the small investment cost is low.Help popularizing of solar water heater.Market efficiency and social benefit are considerable.

Fig. 1 is the plate core schematic cross-section of prior art.

Fig. 2 is an overall structure schematic diagram of the present utility model.

Fig. 3 is a transverse sectional view of the present utility model.

Fig. 4 is a vertical cross-section schematic diagram of the present utility model.

1---preceding metallic plate, 2---pad or sealing wire, 3---the circulation ascending tube, 4---translot, 5---the circulation down pipe, 6---tubular channel, 7---the Inlet and outlet water interface, 8---the back metallic plate, 9---cavity, 10---metal merit weld pad.

The embodiment of this utility model is in conjunction with Fig. 2, Fig. 3, Fig. 4.During the selection material, as the preceding metallic plate 1 of plate core, can select aluminium sheet, galvanized sheet, latten or the copper coin of 0.5 millimeters thick to 1 millimeters thick for use, also can select other common on market metallic plates for use, back metallic plate 8 selects for use galvanized iron sheet or latten to get final product.During shear,,, make 1.5 meters * 1 meter plate core, need 1 semimetal plate approximately such as general 2 meters * 1 meter of commercial metals plate gauge lattice according to the big ting model of plate core daylighting face or according to the size blanking of sheet metal.For attractive in appearance, the size of the preceding metallic plate 1 generally size than back metallic plate 8 is big, so as at two edges of boards along flanging snapping backward.The crowded horizontal tubular channel 6 that curves in preceding metallic plate 1 lower end, can be involved in a metal tube during crowded bending is standard.The circulation that a translot 4 is beneficial to water is rolled on top at preceding metallic plate 1 or back metal 8.Then the mutual flanging snapping in edge of preceding metal 1 and back metallic plate 8, and, prevent to leak, at this moment form a big thin cavity 9. thin cavitys 9 and tubular channel 6 and be communicated with by the line of rabbet joint with soldering or gas welding sealing.Behind the water-filling under the hydraulic pressure effect, plate core drum becomes a big bag and ponding is too many, so preceding metallic plate 1 and back metallic plate 8 must be carried out some being connected by certain density points or line connects, the available point welding machine welds during the point connection, when line connects, available seam welder welding; The density of pad 2 is general, and hickness of metal plate then pad can be rarer at a distance of about 10 centimetres, and metallic plate is thin, and then pad can be closeer; The line welding time should be a vertical line, and sealing wire (2) density is general at a distance of being about 10 centimetres also, and sealing wire can not reach the two ends up and down of plate, in order to avoid dead water seal.During welding, should desire in the middle of two plates of welding position or lateral surface adds strip or the slice plate-shape metal helps weld pad 10, the metal promoted weld pad generally selects iron plate, galvanized sheet iron, copper sheet etc., Ying Yincai and different, in general, two kinds of materials occurring between the preceding metallic plate 1 of plate core, back metallic plate 8 and the metal promoted pad 10 gets final product; If preceding metallic plate 1 or back metallic plate 8 have aluminium sheet to occur, before weldering, also should smear the nonpoisonous and tasteless protective agent of one deck, prevent that aluminium is in the rapid oxidation in pad place.At last draw a metal tube communicatively at the upper end and the plate in-core cavity 9 of plate core, as shine heat the circulation ascending tube 3 of water, lower tubular groove 6 one ends at the plate core are drawn a metal tube communicatively, circulation down pipe 5 as water, tubular channel 6 other ends are drawn a metal tube as Inlet and outlet water interface 7, with each metal tube to draw place's gas welding or soldering sealing affixed.Be coated with the selective light absorbing coating of last layer black again for pole piece.During use, with the plate core pack into around and the bottom insulation material is arranged, be covered with above in the plate case of glass plate, the circulation ascending tube 3 of plate core is connected an end of water tank, and circulation down pipe 5 is connected the water tank other end, for water tank is filled with water, the plate in-core also is full of one deck water, and like this, the area of whole preceding metallic plate is to be subjected to the light endotherm area, be again to carry out heat conducting area to water, the thickness of preceding metallic plate 1 is heat conduction distance---0.5 millimeter just.Because the pressure of water exists, two metallic plates certain distance just occurs at non-weld before and after the plate core, and water can flow therein.The plate core has gradient after installing, and because of latitude changes, makes winter or spring and autumn be subjected to the sunlight direct projection.Preceding metallic plate 1 heat absorption back conduction feedwater, water heats up to rise and enters water tank one end up to following ring ascending tube 3, and there is the temperature difference in the water two ends in the water tank, and also there is the temperature difference lower end waterborne of plate in-core, so the water of another case of water tank follows ring down pipe 5 and enters plate core lower end and replenish, and realizes the circulation of water.

Claims (2)

1, a kind of plate core of solar water heater, front surface scribbles the selective light absorbing coating of black, plate core upper end is from drawing circulation ascending tube (3) communicatively between two metallic plates, circulation down pipe (5) is drawn communicatively from tubular channel (6) in the lower end, constitute water circulation mechanism, it is characterized in that, the double layer of metal plate is superimposed, a transversal tubular groove (6) is bent in the bottom, the line of rabbet joint of tubular channel (6) is communicated with the cavity that preceding metallic plate (1) and back metallic plate (8) form, a translot (4) is rolled at top at preceding metallic plate (1) or back metallic plate (8), two metallic plates form a thin cavity at edge flanging snapping and welded seal, and point or line by certain density between two metallic plates of front and back carry out means of spot welds or line welding;

2, according to the plate core of the described a kind of solar water heater of claim 1, it is characterized in that: in the middle of the preceding metallic plate (1) of welding position and back metallic plate (8) or lateral surface, add the sheet or the lath-shaped metal promoted weld pad (10) of iron, galvanized iron, copper.

Images