CN2830979Y - Novel solar vacuum heat collecting element - Google Patents

Abstract

The utility model relates to a novel solar vacuum heat collecting device, which comprises a metal heat conducting pipe, a metal fin, a vacuum glass heat collecting pipe and a closing cap, wherein the metal fin is directly or indirectly connected with the metal heat conducting pipe. The metal fin and the metal heat conducting pipe are arranged in the vacuum glass heat collecting pipe. The circular arc-shaped surface of the metal fin contacts with the inner wall of the vacuum glass heat collecting pipe in the elastic outward expansion mode or in the dilation and pressure mode. The metal fins can be provided with a welding connection plane, and is connected with the metal heat conducting pipe through the welding connection plane or heat conduction and connection metal thin sheet. Because the metal heat conducting pipe and the metal fin adopt welding connection or auxiliary connection by means of an elastic circle arc-shaped clamping pipe sleeve, reliable heat conduction and connection can be ensured. Because the metal fin forms splicing and assembly after the metal fin is connected with the metal heat conducting pipe, the metal fin and the inner wall of the vacuum glass heat collecting pipe keep heat conduction in the contact mode to the utmost extent, when the metal fin is influenced by the error of the shape and the position of the installation of the metal heat conducting pipe. In the aspect of structure, the improvement of the heat conduction efficiency of the solar vacuum heat collecting pipe device is ensured and the integral efficiency and the reliability of heat conduction in the condition of high and cold temperature of the solar vacuum heat collecting pipe device is improved.

Description

A kind of new type solar energy vacuum heat collection device

Technical field

The utility model belongs to solar energy heat utilization field, especially relates to a kind of new type solar energy vacuum heat collection device formula heat collection device.

Background technology

The metal tab solar vacuum heat-collecting pipe is the main heat collection device in the solar vacuum tube type heat collector, adopt the double-glass vacuum thermal-collecting tube element that is evacuated in the interlayer with interior coating film on glass to carry out thermal-arrest on the structure, and the metal tab face of cylinder and contacted with it heat pipe that employing and glass inner tube face are close to conduct heat, as all adopting the thin type thermal conductance round metal cylindricality tube and the heat pipe of opening to carry out transmission of heat by contact among the Chinese patent CN2389326Y that announced and the CN2390153Y; The semi-cylindrical groove or the circular arc that have indent on the flat face of cylindrical tube carry out transmission of heat by contact with this cylindrical that holds together to close heat conduction with phase change pipe or " U " shape fluid flow tube formula heat pipe; The radius of semi-cylindrical groove or circular arc equals or is slightly larger than the radius of insertion heat pipe wherein; For enhancing heat transfer, the thin metal fin that is adopted has comprised aluminium and copper and alloy thereof; It constitutes position on the flat face in the double-glass vacuum thermal-collecting tube, center of the face of cylinder circular arc of metal tab, with being in contact with it determining of the position of metal heat-conducting pipe in the double-glass vacuum thermal-collecting tube of holding together to close, and the metal heat-conducting pipe comprises the change in location of " U " type thermal-collecting tube, and scope is that engagement edge from glass inner tube is to the center of circle.Previous patent adopts two tab construction to be applicable to the heat conduction with phase change tubular construction, and a back patent adopts a tab construction can be applicable to heat conduction with phase change single tube and " U " type liquid conductance heat pipe double pipe structure respectively.

As everyone knows; metal heat-conducting pipe or thermal-collecting tube and connection to converge and to be rigidly connected in order effectively sealing to adopt usually between case or water tank; therefore; the metal heat-conducting pipe is to be determined jointly by above-mentioned alignment error and the detent mechanism of morpheme sum of errors metal heat-conducting pipe in all-glass vacuum thermal-collecting tube that produces that be rigidly connected with respect to the location in the all-glass vacuum thermal-collecting tube; because what metal tab adopted is to comprise aluminium; the material of aluminium alloy and copper and copper alloy; usually; the aluminium of the overwhelming majority; aluminium alloy and copper and Cu alloy material all are to be easy to be processed into circular arc hold together to close; but the material that does not have suitable elasticity; and when adopting holding together to close circular arc and contact between thin slice and metal heat-conducting pipe; the thin slice column does not have enough school, location accent power for the resistances such as weight of glass heat-collecting vacuum tube; therefore; the restriction to it of positioning result that deformation causes with the installation that adapts to glass heat-collecting vacuum tube and metal heat-conducting pipe and morpheme error can only self take place; and when temperature reduces; the thin slice face of cylinder part of non-ferrous metal is because the further decline of its elasticity of cold brittleness; and temperature is when raising; the section line bulging deformation of the thin slice face of cylinder part of non-ferrous metal is bigger than ferrous metal; thereby when bigger variation takes place in operating temperature; the transmission of heat by contact deformation adaptive capacity of overwhelming majority above-mentioned material can become poorer; usually can cause forming between metal tab and metal heat-conducting pipe circular arc fit dimension point in the power that avulses that produces under the effect of composite factors such as above-mentioned installation morpheme error contacts or the line contact condition; perhaps cause between metal tab and glass evacuated inside pipe wall forming the part contact condition thereby having a strong impact on heat transfer efficiency, result of practical application proves: this heat transfer of holding together to close is connected the heat transfer efficiency that defective causes and loses usually at 12%-22% between metal heat-conducting pipe and metal tab.

In addition, when the radius of interior concave arc equals or be slightly larger than the radius of insertion heat pipe wherein, also can produce another problem: when adopting " U " heat pipe, one end of heat pipe is near glass evacuated inside pipe wall setting, this moment is because the thin metal fin volume ratio heat pipe and the water at low temperature wherein of the interior concave arc of band are little, during work under solar light irradiation first expanded by heating, concave arc girth section is elongated in it, the opening of interior concave arc trends towards drawing in, but because of the thin type thermal conductance round metal cylindricality tube of circular arc flanging contacts with the glass tube inwall, simultaneously, the spacing of heat pipe and glass tube walls is also fixed, so, it radially is not out of shape the leeway of stretching, therefore, can only make the aperture of opening part become big after the girth of interior concave arc is elongated, even the setting of its original radius size equals to insert the radius of heat pipe wherein, also contain the cold water that remains to be heated in the heat pipe, also can not produce corresponding size expansion in certain limit of temperature rise changes, therefore, the transmission of heat by contact situation can degenerate with temperature difference increase between the two, cause local contact or line contact situation, itself just exist the air thermal resistance in gap between transmission of heat by contact, so just cause the decline significantly of its heat transfer efficiency.

For the metal tab of improving heat pipe and the air thermal resistance in glass evacuated inside pipe wall gap, another Chinese patent application CN1317674A discloses a kind of solution that the whole outer surface and the glass evacuated inside pipe wall of circular arc metal tab is bonded together with silica gel with adhesive, so that the whole appearance of fin closely contacts with glass evacuated inside pipe wall fully.Adopt this method can improve heat-transfer effect between metal tab and glass evacuated inside pipe wall, but owing to added the thermal resistance of silica gel, its heat transfer efficiency can be adversely affected; In addition, have on its heat pipe for thermal conductivity pipe or slim fin is housed, then the former is made into integration for fin and heat pipe, will inevitably make processing become quite complicated, the latter also can only be being equipped with of plug-in type etc., exist equally because of the air thermal resistance of fit clearance and heat pipe because of the power that avulses that the composite factors such as morpheme error that produced are installed adverse effect to metal tab and heat pipe heat transfer contact, therefore, this difficult problem of prior art still needs better technical solution.

Goal of the invention

The purpose of one of technical solutions of the utility model is: provide a kind of metal tab by forming along plurality of sections metal tab assembly group on the glass heat-collecting vacuum tube length direction, and metal tab has the outer tension force of elasticity, exists under certain installation morpheme error effect at the metal heat-conducting pipe with guarantee still can further keep a kind of new type solar energy vacuum heat collection device structure of optimum degree Elastic Contact heat transfer with glass evacuated inside pipe wall; Simultaneously, use the processing and forming of elastic metallic fin easy to be more reliable, make production cost and descend than adopting prior art than prior art; And the whole efficiency of new type solar energy vacuum heat collection device device and the reliable heat conduction under the high/low temperature condition are improved.

Summary of the invention

The utility model is achieved through the following technical solutions:

Technical scheme one: the utility model adopts a kind of new type solar energy vacuum heat collection device, comprise the metal heat-conducting pipe, metal tab, glass heat-collecting vacuum tube, capping etc., metal tab is connected with the metal heat-conducting pipe, be co-located in the glass heat-collecting vacuum tube, it is characterized in that, the contact-segment of described metal tab and glass heat-collecting vacuum tube inwall is made semi arch or circular arc cylinder, and metal tab is by forming along plurality of sections metal tab assembly group on the glass heat-collecting vacuum tube length direction, the material of metal tab has elastic restoring force, is elasticity between the arc surface of metal tab and the inwall of glass heat-collecting vacuum tube and opens outward and contact.Described metal tab is connected with the metal heat-conducting pipe, can be the metal heat-conducting pipe with metal tab between through welding, circular arc open pore insert, the semi-cylindrical groove holds together to surround and embraces or welding and the insertion of circular arc open pore, welding and semi-cylindrical groove such as hold together to surround armful at being connected of mode.Described metal tab and metal heat-conducting pipe through the circular arc open pore insert, the semi-cylindrical groove holds together to surround to embrace and is connected, the radius of semi-cylindrical groove or circular arc is slightly less than the radius of insertion heat pipe wherein.Described assembly group along plurality of sections metal tab on the glass heat-collecting vacuum tube length direction can be the plurality of sections metal tab of separating through with the assembly group of formation after the metal heat-conducting pipe is connected, or metal tab with after the metal heat-conducting pipe is connected again along cutting on its arc surface length direction or the glass heat-collecting vacuum tube length direction, connect that arc surface beyond the zone cuts into plurality of sections and the equivalence assembly group that forms.Can handle through coating infrared Absorption layer on the described metal tab.In the space of metal tab institute envelope the convection current barrier flaps can be set in the described vacuum glass heat collection tube, the convection current barrier flaps is made by transparent or opaque book sheet.

The utility model advantage compared with prior art is as follows:

Technical scheme one: because metal tab is by forming along plurality of sections metal tab assembly group on the glass heat-collecting vacuum tube length direction, and metal tab has the outer tension force of elasticity, thereby, can ensure at the metal heat-conducting pipe to exist under certain installation morpheme error effect that metal tab still can further keep the optimum degree Elastic Contact to conduct heat with glass evacuated inside pipe wall; Simultaneously owing to adopted the elastic metallic fin, its processing and forming and and the metal heat-conducting pipe between meticulously be welded to connect processing and become quick, reliable and easy, production efficiency is promoted significantly than the employing prior art; And the reliable heat conduction under the new type solar energy vacuum heat collection device device high/low temperature condition is improved.

Description of drawings

Fig. 1 is the structural representation of a kind of new type solar energy vacuum heat collection device of the utility model embodiment;

Fig. 2 is the structural representation that the utility model metal tab and metal heat-conducting pipe adopt the meticulous embodiment of being welded to connect;

Fig. 3 A, 3B, 3C, 3D are the example structure schematic diagrames that the utility model metal tab circular arc open pore inserts the heat pipe connected mode;

Fig. 4 A, 4B, 4C are that the utility model metal tab semi-cylindrical groove holds together to surround the example structure schematic diagram of embracing the heat pipe connected mode;

Fig. 5 inserts the structural representation that compound mode is connected embodiment through the metal tab welding with the circular arc open pore;

Fig. 6 holds together to surround an armful compound mode through metal tab welding and semi-cylindrical groove to be connected the embodiment schematic diagram;

Fig. 7 A, 7B, 7C, 7D, 7E, 7F, 7G, 7H be the utility model metal tab through with conduct heat is connected weld between sheet metal after, and between the metal heat-conducting pipe through the embodiment schematic diagram of the indirect clipping heat transfer syndeton of elasticity circular arc card pipe box.

The specific embodiment

Below by embodiment a kind of new type solar energy vacuum heat collection device of the present utility model is further described.

One of embodiment: consult shown in Figure 1, a kind of new type solar energy vacuum heat-pipe embodiment of the present utility model comprises " U " type pipe metal heat-conducting pipe 1, metal tab 2, vacuum glass heat collection tube 3, capping 4, " U " type pipe joint 5, the bellows section of flexibly connecting 6, convection current barrier flaps (or insulation material) 7, infrared Absorption layer 8, inert gas 9, wherein, the contact-segment of metal tab and glass heat-collecting vacuum tube inwall is made semi arch or circular arc cylinder, and metal tab adopts resilient blade made, have better flexible bronze strip as employing and comprise silicon bronze, tin bronze, in addition packfong also can adopt spring steel strip or stainless steel strip; Being elasticity between the inwall of the arc surface of metal tab 2 and vacuum glass heat collection tube 3 opens outward and contacts.

As shown in Figure 2, metal tab can form through the assembly group, can be the plurality of sections metal tab of separating through with the assembly group of formation after the metal heat-conducting pipe is connected, or after metal tab and the welding of metal heat-conducting pipe etc. are connected as shown in Figure 2 again along laterally cutting on its arc surface length direction or the glass heat-collecting vacuum tube length direction, wait arc surface beyond join domain laterally to cut into plurality of sections its welding and the equivalence assembly group that forms; Can handle through coating infrared Absorption layer or microwave absorbed layer 8 on the interior outside of metal tab, be the absorber coatings of 1-20um as absorbing wavelength; In addition, in the space of metal tab institute envelope convection current barrier flaps 7 can be set in the vacuum glass heat collection tube, the convection current barrier flaps is made by transparent or opaque book sheet, can be by vertical setting shown in Figure 1, or along being horizontally disposed with on the length direction of pipe; Can insert the method insulation of elastic heat preserving materials such as litaflex, silicates in the space of the metal tab institute envelope in the vacuum glass heat collection tube, substitute the convection current barrier flaps and suppress hot-air convection, and the contacting of reinforcement metal fin and vacuum glass heat collection tube inwall.

It is two-tube into the connection of one that described metal heat-conducting pipe is that two pipes are formed by connecting through " U " type pipe joints 5 each other, also can be that two control all-in-one-pieces " U " type is two-tube; " U " type pipe joint that is communicated with two-tube can be rigid member such as metal or duroplasts " U " shape joint, or adopts flexible connector such as metal hose, bellows or macromolecule hose coupling.In order further to eliminate, can adopt the bellows section of flexibly connecting 6 or other metal hose from metal heat-conducting Guan Yulian remittance case or the fixedly connected installation morpheme error that produces of water tank.

But described metal heat-conducting pipe single tube or two-tube, the former is as heat pipe, and the latter such as liquid spread heat pipe; Metal heat-conducting pipe single tube is meant the single-walled pipe or the double-wall pipe of inner casing tube, wherein, the double-wall pipe of inner casing tube is a metal flow passage type heat pipe, also comprise a built-in flow-path tube in the straight tube, the employing solar heat collector dual channel tubular type junction structure unit described in Chinese patent application 200410066904.0 the metal flow deferent.

Two of embodiment: a kind of new type solar energy vacuum heat collection device, comprise metal heat-conducting pipe 1, metal tab 2, glass heat-collecting vacuum tube 3, capping 4, metal tab is connected with the metal heat-conducting pipe, be co-located in the glass heat-collecting vacuum tube, the contact-segment of metal tab and glass heat-collecting vacuum tube inwall is made semi arch or circular arc cylinder, and metal tab is by forming along plurality of sections metal tab assembly group on the glass heat-collecting vacuum tube length direction, the material of metal tab has better elastic, is elasticity between the arc surface of metal tab and the inwall of glass heat-collecting vacuum tube and opens outward and contact.

Metal tab is connected with the metal heat-conducting pipe, can be the metal heat-conducting pipe with metal tab between through welding, circular arc open pore insert, the semi-cylindrical groove holds together to surround and embraces or welding and the insertion of circular arc open pore, welding and semi-cylindrical groove such as hold together to surround armful at being connected of mode.It is single tube or the heat transfer type of attachment between several metal tab and metal heat-conducting pipe when two-tube that Fig. 3 to Fig. 6 has provided the metal heat-conducting pipe respectively, wherein, Fig. 3 A, 3B, 3C, 3D is the connection of inserting the heat pipe mode through metal tab circular arc open pore, Fig. 4 A, 4B, 4C holds together to surround the connection of embracing the heat pipe mode through metal tab semi-cylindrical groove, Fig. 5 inserts being connected of compound mode through the metal tab welding with the circular arc open pore, wherein, after metal heat-conducting Guan Xianyu circular arc open pore insert to connect again through the indent bottom of circular arc (black evagination position is a weld) through meticulous solderings such as ultrasonic wave or laser, metal tab and metal heat-conducting pipe are welded together; Fig. 6 holds together to surround with the semi-cylindrical groove through the metal tab welding to embrace being connected of compound mode, wherein, metal heat-conducting Guan Xianyu semi-cylindrical groove holds together to surround to be embraced, after the indent bottom of circular arc (black evagination position is a weld) adopts meticulous solderings such as ultrasonic wave or laser to be welded into metal tab.Metal tab and metal heat-conducting pipe through the circular arc open pore insert, the semi-cylindrical groove holds together to surround to embrace and is connected, the radius of semi-cylindrical groove or circular arc should be slightly less than the radius of insertion heat pipe wherein, and, according to shown in Fig. 3 to Fig. 6, should reserve the expansion clearance A and the B that are fit to reach on the semicolumn or the face of cylinder metal tab on the heat pipe contact arc surface in the thermal-collecting tube serviceability temperature scope respectively, make it keep interference fit or swelling good each other to ensure heat transfer contact.

Three of embodiment: a kind of new type solar energy vacuum heat collection device, comprise metal tab 1, metal heat-conducting pipe 2, glass heat-collecting vacuum tube 3, capping 4, conduct heat and connect sheet metal 10, elasticity circular arc card pipe box 11, have metal heat-conducting pipe 2 and metal tab 1 in the glass heat-collecting vacuum tube 3, metal tab is an elastic sheet, metal tab is nature compressing bending and contacts with its circular arc cylinder inwall formation close property in glass heat-collecting vacuum tube, metal tab forms along plurality of sections metal tab assembly group on the glass heat-collecting vacuum tube length direction, provided the metal heat-conducting pipe shown in Fig. 7 A to 7H respectively and be single tube or the heat transfer type of attachment between several metal tab and metal heat-conducting pipe when two-tube, wherein, it is respectively flat sheet that metal tab is connected sheet metal with heat transfer, interconnect A through meticulous welding methods such as ultrasonic wave or laser as Fig. 7,7B, shown in the 7E, also metallurgical pressing such as roll extrusion or machinery closely connection as riveted joint etc. connect, metal tab also can be welded mutually with elasticity circular arc card pipe box, before the installation, as Fig. 7 B, shown in the 7E, the elastic metallic fin can be provided with the guiding knuckle of circular arc The initial segment according to the size that matches of itself and glass heat-collecting vacuum tube inwall, promptly form after the installation as Fig. 7 A, 7C, 7D, 7F, 7G, shown in the 7H, wherein, Fig. 7 E installs the back and forms Fig. 7 G, metal tab forms close property with its circular arc cylinder inwall and contacts under elastic reaction, thereby can save the manufacturing procedure of metal tab circular arc cylinder moulding.

Press shown in Fig. 7 B, being connected of metal tab and metal heat-conducting pipe be through its affixed heat transfer connect part outer tube wall clamping of sheet metal 10 clad metal heat pipes after add elasticity circular arc card pipe box 11, but described elasticity circular arc card pipe box metal such as high-carbon steel or stainless steel, or the engineering plastics of nonmetal as anti-middle temperature, or both combinations such as heatproof engineering plastics thin slice liner add modes such as buckleing elastic metallic circular arc card pipe box and constitute, thereby, can utilize the distortion cuttability that connects the heat-transfer metal thin slice to stop and reduce and cause under alignment error and the influence of temperature change that because of the metal heat-conducting pipe exists the power of avulsing is to causing the harmful effect of contact gap between metal tab and heat pipe tube wall; The internal diameter of elasticity circular arc card pipe box should connect the outer warp behind the sheet metal clad metal heat pipe less than conducting heat, make between the three in thermal-collecting tube serviceability temperature scope and to produce the swelling contact guarantee and conduct heat good, when elasticity circular arc card pipe box adopts the high-carbon steel or stainless steel, can be by shown in Fig. 7 G: sheet metal be connected between sheet metal and elasticity circular arc card pipe box in illustrated circular arc tangential line contact position (black evagination position) respectively with conducting heat, both link into an integrated entity through meticulous solderings such as ultrasonic wave or laser, the back connects by aforesaid method clamping, equally, the metal heat-conducting pipe can be by the identical method setting of one of embodiment.

Four of embodiment: a kind of new type solar energy vacuum heat collection device, comprise metal heat-conducting pipe 1, metal tab 2, glass heat-collecting vacuum tube 3, capping 4, insulation material 7, metal tab is connected with the metal heat-conducting pipe, be co-located in the glass heat-collecting vacuum tube, the contact-segment of metal tab and glass heat-collecting vacuum tube inwall is made semi arch or circular arc cylinder, and metal tab is by forming along plurality of sections metal tab assembly group on the glass heat-collecting vacuum tube length direction, can adopt in the space of the metal tab institute envelope in vacuum glass heat collection tube and insert litaflex, silicates etc. produce the elasticity expansive force insulation material the method insulation and suppress hot-air convection, and the contacting of reinforcement metal fin and vacuum glass heat collection tube inwall.Settings such as the connection of metal tab and metal heat-conducting pipe and embodiment's is two identical.

Operation principle: solar radiation is converted to heat energy by the absorption of the sunshine selective absorption plating on the glass face in the vacuum tube interlayer on vacuum tube, its heat is passed to through glassy layer and is close to the metal tab of making semi arch or circular arc cylinder in the pipe on the glass face with the contact-segment of glass heat-collecting vacuum tube inwall, coated can help absorptive thermal radiation at the infrared Absorption layer of metal tab surfaces externally and internally, and heat is through metal tab or again through connecting the output of the heat transfer working media in the metal heat-conducting pipe again after the conduction between heat-transfer metal thin slice and metal heat-conducting pipe.

Adopt aforesaid method, can make between the three can metal heat-conducting pipe and glass heat-collecting vacuum tube all exist install under morpheme error and the influence of temperature change still can with the good or maximum heat transfer conditions of mutual maintenance, guarantee to improve the heat transfer efficiency of new type solar energy vacuum heat collection device from structure, and improved the whole efficiency of new type solar energy vacuum heat collection device and the reliable heat conduction under the high/low temperature condition.

Claims (6)

1, a kind of new type solar energy vacuum heat collection device, comprise the metal heat-conducting pipe, metal tab, glass heat-collecting vacuum tube, capping etc., metal tab is connected with the metal heat-conducting pipe, be co-located in the glass heat-collecting vacuum tube, it is characterized in that, the contact-segment of described metal tab and glass heat-collecting vacuum tube inwall is made semi arch or circular arc cylinder, and metal tab is by forming along plurality of sections metal tab assembly group on the glass heat-collecting vacuum tube length direction, the material of metal tab has elastic restoring force, is elasticity between the arc surface of metal tab and the inwall of glass heat-collecting vacuum tube and opens outward and contact.

2, a kind of new type solar energy vacuum heat collection device according to claim 1, it is characterized in that, described metal tab is connected with the metal heat-conducting pipe, can be the metal heat-conducting pipe with metal tab between through welding, circular arc open pore insert, the semi-cylindrical groove holds together to surround and embraces or welding holds together to surround being connected of armful mode with the insertion of circular arc open pore, welding with the semi-cylindrical groove.

3, a kind of new type solar energy vacuum heat collection device according to claim 2, it is characterized in that, described metal tab and metal heat-conducting pipe through the circular arc open pore insert, the semi-cylindrical groove holds together to surround to embrace and is connected, the radius of semi-cylindrical groove or circular arc is slightly less than the radius of insertion heat pipe wherein.

4, a kind of new type solar energy vacuum heat collection device according to claim 1, it is characterized in that, described assembly group along plurality of sections metal tab on the glass heat-collecting vacuum tube length direction can be the plurality of sections metal tab of separating through with the assembly group of formation after the metal heat-conducting pipe is connected, or metal tab with after the metal heat-conducting pipe is connected again along cutting on its arc surface length direction or the glass heat-collecting vacuum tube length direction, connect that arc surface beyond the zone cuts into plurality of sections and the assembly group that forms.

5, a kind of new type solar energy vacuum heat collection device according to claim 1 is characterized in that, can handle through coating infrared Absorption layer on the described metal tab.

6, a kind of new type solar energy vacuum heat collection device according to claim 1 is characterized in that, in the space of metal tab institute envelope the convection current barrier flaps can be set in the described vacuum glass heat collection tube, and the convection current barrier flaps is made by transparent or opaque book sheet.

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