CN203203271U - Double-film efficient flat solar energy collector - Google Patents

Abstract

The utility model provides a double-membrane high-efficiency flat-plate solar heat collector, which includes a support device, a heat preservation device, a copper tube plate core, a heat-absorbing coating plate, and a fixing device for fixing the copper tube plate core and the heat-absorbing coating plate . The fixing device includes a rectangular glass fiber reinforced plastic bar arranged at the bottom of the U-shaped groove, L-shaped buckles arranged symmetrically at both ends of the rectangular glass steel steel bar and fastened, and a concave buckle set on the rectangular glass steel steel bar , the concave buckle fixes the copper tube of the copper tube plate core in its depression, the heat-absorbing coating plate is arranged above the copper tube plate core, and the upper surface of the heat-absorbing coating plate is attached with a The inner surface of the heat-absorbing coating plate is attached with an inner coating that plays a role in heat conduction. Compared with traditional heat collectors, the double-membrane high-efficiency flat solar heat collector designed by the utility model has greatly improved solar energy absorption rate and utilization rate, which is beneficial to energy saving and emission reduction.

Description

A double-film high-efficiency flat-panel solar collector

technical field

The utility model relates to a solar heat collector, in particular to a double-film high-efficiency flat-plate solar heat collector.

Background technique

Flat-panel solar collectors are the basic components for low-temperature thermal utilization of solar energy, and are the leading products in the world solar market. They have been widely used in domestic water heating, swimming pool heating, industrial water heating, building heating and air conditioning, and many other fields. The flat panel solar collector is mainly composed of heat absorbing plate, transparent cover plate, heat insulation layer and shell.

The heat absorbing plate is usually a metal plate, such as a copper plate or an aluminum plate. In order to make the heat-absorbing plate of the flat-panel solar collector absorb solar radiation energy to the greatest extent and convert it into heat energy, the heat-absorbing plate is generally covered with an absorbing coating. , The lower the reflectivity and transmission, the higher the temperature inside the flat panel solar collector and the more heat energy can be obtained. The absorbent coating is therefore the key to the technology.

The above-mentioned absorbing coatings can be divided into two categories, one is non-selective absorbing coatings, which refer to absorbing coatings whose optical properties are independent of the wavelength of radiation, and the other is selective absorbing coatings, which refer to their optical properties Absorbing coatings that vary significantly with the wavelength of radiation. Generally, the "blue titanium film" used abroad is more selective than the "black chrome coating" used in China, and the heat absorption is better. Absorption, conduction of heat, and conversion of heat have a series of processes of converting heat energy into other energy sources, but there are still deficiencies such as poor heat conduction and low utilization rate.

Utility model content

The purpose of this utility model is to provide a solar heat collector, especially a double-film high-efficiency flat-plate solar heat collector, so as to meet the current requirements for high solar energy absorption rate, high conversion rate and high utilization rate of solar heat collectors. need. The technical solution of the utility model is:

A double-film high-efficiency flat-plate solar collector, including a support device, a heat preservation device, a copper tube plate core, a heat-absorbing coating plate, and a fixing device for fixing the copper tube plate core and the heat-absorbing coating plate, the support The device is a support groove composed of a rectangular bottom frame and the collector frame fixedly arranged at both ends of the bottom frame. The heat preservation device is a U-shaped groove embedded in the support groove, so that the The outer surface of the U-shaped groove covers the concave inner surface of the supporting groove.

The fixing device includes a rectangular glass fiber reinforced plastic bar arranged at the bottom of the U-shaped groove, an L-shaped buckle which is symmetrically arranged at both ends of the rectangular glass fiber reinforced plastic bar and fastened, and a rectangular glass steel bar arranged on the rectangular glass steel bar. A concave buckle, the concave buckle fixes the copper tube of the copper tube plate core in its depression, the heat-absorbing coating plate is arranged above the copper tube plate core, and the heat-absorbing coating An outer coating for heat absorption is attached to the upper surface of the plate, and an inner coating for heat conduction is attached to the inner surface of the heat absorption coating plate.

Further in the present invention, the thermal insulation device includes a bottom thermal insulation layer and side thermal insulation layers symmetrically arranged at both ends of the bottom thermal insulation layer, so that the bottom thermal insulation layer and the side thermal insulation layers form the U-shaped groove.

Further in the present invention, the copper tube plate core is a serpentine tube composed of several copper tubes arranged side by side and connected end to end.

Further in the present invention, the number of concave buckles is less than or equal to the number of the copper tubes.

Further in the present invention, the thickness of the outer coating is ≤100um, and the thickness of the inner coating is ≤100um.

The technical effect of the utility model is mainly reflected in:

① By setting the first film on the outer surface of the heat-absorbing coating plate, that is, the outer coating that acts as a heat-absorbing layer, it is beneficial to promote the absorption of solar energy and improve the heat-collecting capacity of the solar collector;

② By setting the second film on the inner surface of the heat-absorbing coating plate, that is, the inner coating that plays a heat-conducting role, the solar energy absorbed by the outer coating and the heat-absorbing coating plate is transmitted to the inside of the solar collector in time, reducing Heat dissipation, improve heat utilization;

③Compared with traditional heat collectors, the double-film high-efficiency flat-plate solar heat collector designed by the utility model has greatly improved solar energy absorption rate and utilization rate, which is beneficial to energy saving and emission reduction.

Description of drawings

Fig. 1 is a schematic structural view of a double-film high-efficiency flat-panel solar heat collector of the present invention.

in.

1 Bottom frame 2 Collector frame 3 Bottom insulation 4 outer coating 5 concave buckle 6 Heat absorbing coated board 7 Heat absorbing coated board 8 Rectangular FRP Rod 9 copper pipe 10 inner coating 11 side insulation the the

Detailed ways

Below in conjunction with accompanying drawing, technical solution of the utility model is further described. It is only an example and does not constitute any limitation to the protection scope of the present utility model. All technical solutions formed by equivalent replacement or equivalent transformation all fall within the protection scope of the utility model.

The utility model is a double-film high-efficiency flat-plate solar heat collector, as shown in Figure 1, including a support device, a heat preservation device, a copper tube plate core, a heat-absorbing coating plate 6 for the core assembly of the solar heat collector, and a copper plate for fixing Fixing device for tube sheet core and heat absorbing coating plate 6. In the utility model, the supporting device is a support groove composed of a rectangular bottom frame 1 and a set of collector frames 2 symmetrically and fixedly arranged at both ends of the bottom frame 1 . The heat preservation device is a U-shaped groove embedded in the above-mentioned supporting groove, so that the outer surface of the U-shaped groove covers the concave inner surface of the supporting groove, reducing the number of other components arranged in the U-shaped groove Dissipate heat to the outside through the supporting device. The thermal insulation device includes a bottom thermal insulation layer 3 and side thermal insulation layers 11 symmetrically arranged at both ends of the bottom thermal insulation layer 3, so that the bottom thermal insulation layer 3 and the side thermal insulation layers 11 form the U-shaped groove.

The above-mentioned fixing device includes a rectangular glass fiber reinforced plastic bar 8 arranged at the bottom of the U-shaped groove, a group of L-shaped buckles 7 which are symmetrically arranged at both ends of the rectangular glass fiber reinforced plastic bar 8 and fastened, and arranged on the rectangular glass steel bar 8. The concave buckle 5 on the glass steel bar 8, the concave buckle 5 can be movably fixed on the rectangular glass steel bar 8, and can also be connected with the rectangular glass steel bar 8 as a whole, and the concave buckle 5 connects the copper tube The copper tube 9 of the plate core is fixed in its depression, and the quantity of the concave buckle 5 is less than or equal to the quantity of the copper tube 9, which can be evenly distributed on the rectangular glass fiber reinforced plastic strip 8, or can be arranged according to the copper tube 9 , corresponding to the position of the copper pipe 9 is arranged on the rectangular glass fiber reinforced plastic strip 8. The copper tube plate core described in the utility model is a serpentine tube composed of several copper tubes 9 arranged in parallel and connected end to end. A combination of U-shaped copper tubes.

The heat-absorbing coating plate 6 of the core assembly of the solar heat collector is arranged above the copper tube plate core, and the heat-absorbing coating plate 6, as known in the art, has contained one layer of absorbing coating on it, such as "blue titanium film". "or "black chrome coating" and so on, when sunlight is directly on the heat-absorbing coating plate 6, although it absorbs solar energy, it will inevitably produce transmission and reflection phenomena. The heat-coated plate 6 will not fully absorb the sunlight and convert it into heat energy, and the conversion rate will be low. The utility model attaches the outer coating 4 which plays a heat absorption effect on the upper surface of the heat absorption coating plate 6, and the inner coating 10 which plays a heat conduction effect is attached to the inner surface of the heat absorption coating plate 6. When sunlight When the outer coating 4 is directly irradiated, it can further promote sunlight absorption and reduce reflection and transmission phenomena on its surface. The inner coating 10 has a heat conduction function, and is responsible for absorption, heat conduction, heat dissipation, and transformation, so that the temperature in the solar collector continues to rise, heat absorption, heat generation, and transformation, forming a virtuous cycle, thereby reducing the loss of heat energy. Experiments show that when the thickness of the outer coating 4 is ≤100 um, or the thickness of the inner coating 10 is ≤100 um, the effect of heat absorption or heat conduction is better. The materials used to prepare the above-mentioned outer coating layer 4 having a heat-absorbing function or the materials used to prepare the inner coating layer 10 having a heat-conducting function can be commercially available or self-made.

Therefore, by arranging the first film on the outer surface of the heat-absorbing coating plate, that is, the outer coating 4 that acts as a heat absorber, it is beneficial to promote the absorption of solar energy and improve the heat collection capacity of the solar collector; The inner surface of the plate is provided with a second film, that is, the inner coating 10 which acts as a thermal conductor, and conducts the solar energy absorbed by the outer coating 4 and the heat-absorbing coating plate to the interior of the solar collector in a timely manner, reducing heat dissipation and improving thermal energy utilization efficiency; compared with traditional heat collectors, the double-film high-efficiency flat-panel solar collector designed by the utility model has greatly improved solar energy absorption rate and utilization rate, which is conducive to energy saving and emission reduction.

Claims (6)

1. two film high-efficient flat-plate solar thermal collector, comprise bracing or strutting arrangement, attemperator, copper pipe plate core, heat absorbing coating plate (6), reach the fixture that is used for fixed copper tube sheet core and heat absorbing coating plate (6), the brace groove that described bracing or strutting arrangement is made up of a rectangle underframe (1) and the symmetrical heat collector frame (2) that is fixedly installed on underframe (1) two ends, described attemperator is one to be embedded the U-shaped groove in described brace groove groove, make the outer surface of described U-shaped groove cover the concave inner surface of described brace groove, it is characterized in that:

Described fixture comprises a pane steel bar (8) that is arranged on described U-shaped trench bottom, symmetrically is arranged on pane steel bar (8) two ends and with the L type buckle (7) of its fixing be arranged on spill buckle (5) on the pane steel bar (8), described spill buckle (5) is fixed on its recess with the copper pipe (9) of described copper pipe plate core

Described heat absorbing coating plate (6) is arranged on described copper pipe plate core top, and the upper surface of described heat absorbing coating plate (6) has been attached with the external coating (4) of heat-absorbing action, and the inner surface of described heat absorbing coating plate (6) adheres to the undercoating (10) that conductive force has been arranged.

2. a kind of pair of film high-efficient flat-plate solar thermal collector according to claim 1, it is characterized in that: described attemperator comprises end heat-insulation layer (3) and the symmetrical side heat-insulation layer (11) that is arranged on end heat-insulation layer (3) two ends, makes end heat-insulation layer (3) and side heat-insulation layer (11) form described U-shaped groove.

3. a kind of pair of film high-efficient flat-plate solar thermal collector according to claim 1 is characterized in that: described copper pipe plate core is by several copper pipes (9) side by side and the coiled pipe that joins end to end and constitute.

4. a kind of pair of film high-efficient flat-plate solar thermal collector according to claim 1, it is characterized in that: the quantity of spill buckle (5) is less than or equal to the quantity of described copper pipe (9).

5. a kind of pair of film high-efficient flat-plate solar thermal collector according to claim 1 is characterized in that: the thickness≤100um of described external coating (4).

6. a kind of pair of film high-efficient flat-plate solar thermal collector according to claim 1 is characterized in that: the thickness≤100um of described undercoating (10).