CN2248325Y

CN2248325Y - Hot-tube type double-glass vacuum tube solar heat collector

Info

Publication number: CN2248325Y
Application number: CN95231702U
Authority: CN
Inventors: 王连成
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-14
Filing date: 1995-07-14
Publication date: 1997-02-26
Anticipated expiration: 2005-07-14

Abstract

The utility model discloses a hot pipe type double-glass vacuum pipe solar energy heat collecting device used in a solar energy system. The hot pipe type double-glass vacuum pipe solar energy heat collecting device used in a solar energy system is provided with a double-layer concentric glass pipe. The double-layer concentric glass pipe is composed of an outer pipe and an inner pipe. A vacuum state is between the outer pipe and the inner pipe. A selective coat is coated on the outer wall of the inner pipe. A heat pipe is arranged in the inner pipe. A sealing ring is arranged on the inner opening of the inner pipe. The outer end of the sealing ring is provided with a sealing cover. An anti-freezing heat conducting working medium is filled in the inner pipe. The hot pipe type double-glass vacuum pipe solar energy heat collecting device used in a solar energy system has the advantages that the hot pipe type double-glass vacuum pipe solar energy heat collecting device used in a solar energy system has good anti-freezing performance, simple manufacturing technique, low production cost, reliable work, and high heat transfer efficiency; the double-layer concentric glass pipe is not be frozen to be cracked below-50 DGE C.

Description

Heat pipe-type double-glass vacuum tube solar heat-collecting device

The utility model belongs to a kind of heat collector, particularly a kind of heat pipe-type double-glass vacuum tube solar heat-collecting device that is used for solar energy system.

Solar thermal collector is the core component in the solar energy system, its service behaviour and production cost directly have influence on the runnability and the average price of solar energy system, therefore, the technical performance index that improves constantly solar thermal collector has great importance for the application of solar energy.

Produce the existing nearly 20 years history of vacuum tube collector both at home and abroad, the product of producing can roughly be divided into two classes.One class is the heat pipe vacuum tube hot collector that has heat pipe, and it heats by heat pipe heat exchanging fluid, and another kind of is that its direct heat exchanging fluid heats not with the vacuum tube collector of heat pipe.Not relatively simple for structure with the vacuum tube collector of heat pipe, glass vacuum pipe heat collector as Tsing-Hua University's production, see shown in Figure 3, it has a double-deck concentric glass 8, double-deck concentric glass 8 is made up of interior pipe and outer tube, between interior pipe and the outer tube is vacuum state, scribbles selective coating on the outer wall of interior pipe, forms heat dump.During use, the openend and the solar energy system of double-deck concentric glass 8 join, and heat exchanging fluid directly enters in the interior pipe of double-deck concentric glass 8 and heats.Though this vacuum tube collector is simple in structure, cost is lower, but resistance to low temperature is poor, in the time of subzero 18 ℃, heat exchanging fluid (being generally water) in the pipe can freeze, cause glass tube to break, and a vacuum tube collector damages whole solar energy system and just can not work, and has reduced the solar energy system reliability of operation, and heat exchanging fluid fouling in can the interior pipe in double-deck concentric glass 8 after the heating, reduce heat-transfer effect, in addition, the outside dimension tolerance of double-deck concentric glass 8 is bigger, is generally ± 1 millimeter, leak easily when joining with solar energy system, sealing property is relatively poor.

Heat pipe vacuum tube hot collector mainly is made up of heat pipe and glass tube, vacuum tube collector as Beijing sun the subject of knowledge and the object of knowledge and that company's production of Fei Erke Ida Leah, see Fig. 4, shown in Figure 5, it is made up of heat pipe 9, absorber plate 10 and single-glass pipe 11, its absorber plate 10 is connected on the heat pipe 9, and place in the glass tube 11, hot sealing between the heat-exchange end of heat pipe 9 and the glass tube 11 is a vacuum state in the glass tube 11.Because metal is different with the attribute of glass, therefore, can not adopt the method for routine to seal between heat pipe 9 and the glass tube 11, and hot sealing complex manufacturing not only, and will on specialized apparatus, carry out, production cost is higher; In addition, because metal is different with the hot expansibility of glass, under the effect of extraneous temperature cycle variation, sealing-in place between heat pipe 9 and the glass tube 11 can be leaked gas unavoidably, therefore, this vacuum tube collector keeps the reliability of vacuum not high, and the decline of vacuum, not only can reduce the thermal efficiency of heat collector, even can cause scrapping of heat collector; Also have, this vacuum tube collector absorbs heats by absorber plate 10, when sunlit angle not simultaneously, the heat that absorber plate 10 absorbs is also different, thereby the thermal efficiency of heat collector will reduce along with the inclination of sunlight.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides that a kind of production technology is simple, resistance to frost good, and production cost is low, the heat pipe-type double-glass vacuum tube solar heat-collecting device of reliable operation.

The utility model is achieved in that

It has a glass tube, glass tube is double-deck concentric glass, double-deck concentric glass is made up of outer tube and interior pipe, vacuum state for sealing between outer tube and the interior pipe, on the outer wall of interior pipe, scribble selective coating, form heat dump, in the interior pipe of glass tube, heat pipe is housed, sealing ring is equipped with at internal orifice place at interior pipe, thereby in interior pipe, form the space of sealing, capping is housed, in the enclosure space of interior pipe, be filled with antifreeze heat-conducting work medium in the outer end of sealing ring, the heat transferred heat pipe that utilizes antifreeze heat-conducting work medium that heat dump is absorbed, heat pipe spreads out of heat again.

The utility model compared with prior art has following advantage:

1. be filled with antifreeze heat-conducting work medium in interior pipe, it is low that this antifreeze heat-conducting work medium has freezing point, the boiling point height, and characteristics such as non-scaling, in the time of subzero 50 ℃, the not bursting by freezing of double-deck concentric glass has improved resistance to frost greatly.

2. the heat of heat dump absorption passes to the heat exchanging fluid of solar energy system by heat pipe, antifreeze heat-conducting work medium does not contact with heat exchanging fluid, therefore, the damage of a glass tube does not influence the work of whole solar energy system, has improved the solar energy system reliability of operation.

3. manufacturing process is simple, the sealing and the fixing of heat pipe of interior pipe internal orifice are realized with sealing ring and capping, avoided the sealing-in between metal and the glass, neither vacuumize in the interior pipe, also do not have normal pressure, adopt traditional handicraft antifreeze heat-conducting work medium can be sealed up, not only assembly method is simple, and significantly reduced production cost, improved the ratio of performance to price of product.

4. heat dump is cylindrical, and the calorie value of absorption is only relevant with sunlit intensity, does not change with sunlit angle, thereby has improved the thermal efficiency of product.

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the structural representation of glass vacuum pipe heat collector in the prior art;

Fig. 4 is the structural representation of heat pipe vacuum tube hot collector in the prior art;

Fig. 5 is the B-B cutaway view of Fig. 4.

As shown in Figure 1 and Figure 2, the utility model has a glass tube, and glass tube is double-deck concentric glass, and double-deck concentric glass is made up of outer tube 4 and interior pipe 5, is vacuum state between outer tube 4 and the interior pipe 5, forms the vacuum circuit of sealing; On the outer wall of interior pipe 5, scribble selective coating, form heat dump; In the interior pipe 5 of glass tube heat pipe 1 is housed, the heat absorbing end of heat pipe 1 is positioned among the pipe 5, and the heat-exchange end of heat pipe 1 is positioned at outside the pipe 5, and heat pipe 1 can be processed voluntarily, also can adopt the suitable approved product of specification; Sealing ring 3 is equipped with at internal orifice place at interior pipe 5, thereby form the space of a sealing in interior pipe 5, in the outer end of sealing ring 3 capping 2 is housed, capping 2 sticks with glue in the end of double-deck concentric glass, weld together between capping 2 and the heat pipe 1, make the fixed-site of heat pipe 1; Be filled with liquid antifreeze heat-conducting work medium 6 in the enclosure space of interior pipe 5, be used for transmitting the heat that heat dump absorbs, described antifreeze heat-conducting work medium 6 can adopt oils, also can adopt the water that adds antifreezing agent; In the end of heat pipe 1 elastic supporting member for supporting optical member 7 is installed, so that heat pipe 1 keeps suitable position in interior pipe 5, described elastic supporting member for supporting optical member 7 adopts the oil resistant fluorubber to make, and elastic supporting member for supporting optical member 7 also can form with the steel wire coiling.

Claims

1. heat pipe-type double-glass vacuum tube solar heat-collecting device, comprise glass tube and the heat pipe (1) that is contained in the glass tube, it is characterized in that, described glass tube is double-deck concentric glass, double-deck concentric glass is made up of outer tube (4) and interior pipe (5), between outer tube (4) and the interior pipe (5) is vacuum state, on the outer wall of interior pipe (5), scribble selective coating, at the internal orifice place of interior pipe (5) sealing ring (3) is housed, in the outer end of sealing ring (3) capping (2) is housed, in interior pipe (5), is filled with antifreeze heat-conducting work medium (6).

2. heat pipe-type double-glass vacuum tube solar heat-collecting device according to claim 1 is characterized in that, in the end of heat pipe (1) elastic supporting member for supporting optical member (7) is installed.