TWI583902B - Solar thermal collector and building accessory structure - Google Patents

Description

Solar collectors and additional structures of buildings

The present invention relates to an architecturally integrated energy harvester and additional structure for a building, and more particularly to a building integrated solar collector and a building attachment structure to which the solar collector is applied.

With the rise of environmental awareness, the concept of energy conservation and carbon reduction has gradually attracted the attention of the audience. The development and utilization of renewable energy has become the focus of active development in all countries of the world. Among the renewable energy sources, solar energy is widely available and has become widely used because solar energy is available everywhere and unlike other energy sources that pollute the earth (eg, petrochemical energy, nuclear energy). Important industry.

If the solar collector can have a large area of illumination, a relatively large amount of thermal energy can be generated. Therefore, many manufacturers hope to integrate the concept of “green energy building” into solar collectors, that is, to lay solar collectors at the most exposed areas of the building, so as to make up for the expenses in the building by using the heat generated by the solar collectors. Thermal energy, such as domestic hot water and heating. However, the current solar collectors are still very large in size and thickness, thus limiting solar energy collection. The application and design flexibility of the building integrated solar thermal (BIST) field.

The invention provides a solar collector and an additional structure of a building, wherein the solar collector has a small volume and overall thickness, a relatively small wind resistance, and a structural rigidity, so that it is suitable for use on a building as a building. Additional structure.

The solar collector of the present invention comprises a heat absorbing plate and a heat insulating plate; the heat absorbing plate comprises a first plate body and a plurality of first engaging portions connecting the first plate body; the heat insulating plate comprises a second plate body and a connection a plurality of second engaging portions of the second plate body; the first engaging portions are respectively engaged with the second engaging portions, and a spacing is maintained between the first plate body and the second plate body to jointly define a heat collecting flow The channel is provided for the heat transfer liquid to flow through the superheat collecting channel; the heat transfer coefficient of the heat absorbing plate is more than 30 times the heat transfer coefficient of the heat insulating plate.

In an embodiment of the invention, the solar collector further includes a plurality of connecting pipes connected to and connected to the heat collecting flow path.

In an embodiment of the invention, each of the connecting pipes includes a plurality of holes that communicate with the heat collecting flow path for the heat transfer liquid to flow into or out of the heat collecting flow path through the opening of the connecting pipe.

In an embodiment of the present invention, each of the second engaging portions includes an extending slot and a hooking slot, wherein each of the first engaging portions includes an extending portion and a hooking portion, and each extending portion is located Corresponding extension slots, corresponding to each hook segment The extension segments are fitted into the corresponding hooking grooves and are engaged with the corresponding hooking grooves to fix the heat absorbing plates adjacent to each other on the heat insulating plate.

In an embodiment of the present invention, the solar collector further includes a plurality of fillers disposed in the hooking grooves and located between the hooking sections of the adjacent two heat absorbing panels and the corresponding hooking slots.

In an embodiment of the invention, the filler comprises a cassette, a hardener or a sealant.

In an embodiment of the invention, each of the first plate body and each of the second plate bodies is a curved plate body, and each of the first plate bodies and the corresponding second plate body have the same arc direction.

In an embodiment of the invention, the solar collector further includes a solar selective absorbing film covering the illuminating surface of the heat absorbing plate.

The building attachment structure of the present invention is adapted to be disposed on an exterior surface of a building, the additional structure comprising a plurality of solar collectors as previously described and a frame. The frame is used to frame the solar collector. The solar collectors are disposed in parallel with each other within the frame.

In an embodiment of the invention, the frame includes a plurality of transparent front covers and a plurality of transparent back covers. The transparent front covers respectively cover corresponding heat absorbing plates, and the transparent back covers respectively cover corresponding heat insulating plates.

In an embodiment of the invention, the frame includes a plurality of transparent sleeves for respectively surrounding the solar collector, and the transparent sleeve is integrally formed.

In an embodiment of the invention, the material of the transparent sleeve is non-glass Glass material.

In an embodiment of the invention, the material of the transparent sleeve is plastic.

In an embodiment of the invention, the outer surface comprises a balcony or a terrace of the building.

In an embodiment of the invention, the additional structure is a fence disposed on an outer edge of the balcony or the terrace.

In an embodiment of the invention, the outer surface comprises a roof, a window, a terrace or an open space adjacent to the building.

In an embodiment of the invention, the additional structure is a sunshade structure or a shielding structure disposed on a roof, a window, a terrace or an open space adjacent to the building.

Based on the above, the solar collector of the present invention allows the heat transfer liquid to be in direct contact and flow through its heat absorbing plate. Thus, the solar collector of the present invention has a higher heat exchange area than conventional solar collectors. Further, in the solar collector of the present invention, the heat transfer coefficient of the heat absorbing plate is 30 times or more of the heat transfer coefficient of the heat insulating plate. In this way, the thermal energy of sunlight can effectively conduct heat to the heat transfer liquid in the heat collecting channel through the heat absorbing plate having a high heat transfer coefficient and through a large contact area, and is effective by using the heat insulating property of the heat insulating plate. Prevent heat loss. In addition, the heat insulation board of the present invention is formed of a composite material, and has the characteristics of weight, lightness, high structural strength and low heat energy loss rate, so that the overall strength and heat insulation effect can be effectively reduced. The heat shield and the volume and thickness of the outer casing. Therefore, the solar collector of the present invention not only has good solar energy collection Efficiency and high structural strength, its volume and overall thickness can be effectively reduced. Moreover, as the overall thickness of the solar collector is reduced, the wind resistance can be relatively reduced, thereby increasing the application and design flexibility of the solar collector in structural integration.

In addition, unlike conventional solar collectors, which can only be disposed on a roof, the solar collector of the present invention can be disposed in one or more frames to modularize the solar collector to form a building additional structure for configuration. The exterior surface of a building's balcony, window, terrace, etc., as a fence, blinds, or sunshade structure, and absorbs solar energy exposed to the building itself and its surroundings, and converts it into life for the interior of the building. The heat energy used for hot water or heating. Therefore, the design flexibility of the integration of the solar collector and the building can be greatly improved.

The above described features and advantages of the invention will be apparent from the following description.

10‧‧‧Additional structures for buildings

100, 100a, 100b‧‧‧ solar collector

110‧‧‧heat absorbing plate

112‧‧‧First board

114‧‧‧First engagement

114a‧‧‧Extension

114b‧‧‧Combined paragraph

120‧‧‧heat insulation board

122‧‧‧Second plate

124‧‧‧Second engagement department

124a‧‧‧Stretching slot

124b‧‧‧ hooking slot

130‧‧‧Connecting tube

132‧‧‧ Holes

134‧‧‧ water inlet

136‧‧‧Water outlet

140‧‧‧Filling

150‧‧‧Solar selective absorption film

152‧‧‧ damping layer

154‧‧‧absorbing layer

156‧‧‧Anti-reflective layer

200‧‧‧Frame

210‧‧‧Transparent front cover

220‧‧‧Transparent back cover

230‧‧‧Transparent casing

235‧‧‧ Strengthening film

CH‧‧‧Heat collection runner

D1‧‧‧ longitudinal direction

G1‧‧‧ spacing

S‧‧‧Glossy

1 is a schematic diagram of a solar collector in accordance with an embodiment of the present invention.

Figure 2 is a cross-sectional view of the solar collector of Figure 1 taken along line A-A'.

Figure 3 is a graph showing the stress distribution of the solar collector of Figure 2 after application of internal pressure.

4 is a partially enlarged schematic view of the solar collector of FIG. 1.

Figure 5 is a cross-sectional view of the solar collector of Figure 4 taken along line B-B'.

Fig. 6 is a partially enlarged schematic cross-sectional view showing a heat absorbing plate according to an embodiment of the present invention.

Figure 7 is a schematic illustration of an additional structure of a building in accordance with an embodiment of the present invention.

8A to 8C are schematic views showing the disassembly and assembly of components of a transparent sleeve and a solar collector according to an embodiment of the present invention.

9 through 11 are schematic views of the application of additional structures of a building in accordance with various embodiments of the present invention.

The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention. The directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only directions referring to the additional schema. Therefore, the directional terminology used is for the purpose of illustration and not limitation. Also, in the following embodiments, the same or similar elements will be given the same or similar reference numerals.

1 is a schematic diagram of a solar collector in accordance with an embodiment of the present invention. Figure 2 is a cross-sectional view of the solar collector of Figure 1 taken along line A-A'. Referring to FIG. 1 to FIG. 2 simultaneously, in the embodiment, the solar collector 100 includes at least one heat absorbing plate 110 and at least one heat insulating plate 120. The heat absorbing plate 110 includes at least one first plate body 112 and a plurality of first engaging portions 114 connected to the first plate body 112. The heat shield 120 includes at least one second plate 122 and a plurality of second engaging portions 124 that connect the second plate 122. The first engaging portions 114 are respectively engaged with the second engaging portions 124, and a distance G1 is maintained between the first plate 112 and the second plate 122 to jointly define a heat collecting flow path CH for the heat conducting liquid along The longitudinal direction D1 of the first plate body 112 flows through the superheat collecting flow path CH.

In the present embodiment, the heat transfer coefficient of the heat absorbing plate 110 is substantially 30 times or more of the heat transfer coefficient of the heat insulating plate. Specifically, the heat absorbing plate 110 and the heat insulating plate 120 may be integrally formed. The heat absorbing plate 110 can be integrally formed, for example, by stamping or rolling. The material of the heat absorbing plate 110 can be stainless steel, and the heat transfer coefficient is about 12~30 W/(m ° C), and the material of the heat insulating plate can be fiber reinforced plastic. Composite materials such as Fiber Reinforced Plastics (FRP) have a heat transfer coefficient of about 0.23 to 0.35 W/(m ° C). The fiber reinforced plastic may include, for example, a thermosetting resin or a thermoplastic resin, and a glass fiber or a carbon fiber. In detail, the fiber reinforced plastic is mainly composed of a thermosetting resin or a thermoplastic resin mixed with glass fibers or carbon fibers, and the function is like reinforced concrete. In general, the strength of the fiber-reinforced plastic has a large unit weight, that is, the fiber-reinforced plastic has the characteristics of light weight and high structural strength, and the fiber-reinforced plastic has a low heat transfer coefficient and a good heat insulating effect. The heat insulating plate 120 of the material can effectively reduce the volume and thickness of the heat insulating plate 120, and can also increase its structural strength and heat insulation effect. In addition, fiber reinforced plastics are more resistant to corrosion in a variety of environments.

With this configuration, the heat absorbing plate 110 and the heat insulating plate 120 of the present embodiment jointly define a heat collecting flow path CH, and the heat energy of the sunlight can be effectively conducted to the heat collecting flow path CH through the heat absorbing plate 110 having a high heat transfer coefficient. The liquid, and the thermal insulation properties of the heat shield 120 are used to effectively prevent heat loss. Therefore, the solar collector 100 of the embodiment not only has good solar energy collection efficiency and high structural strength. The volume and overall thickness can be effectively reduced, and the wind resistance can be relatively reduced, thereby increasing the application and design flexibility of the solar collector 100 in building integration.

In the present embodiment, the solar collector 100 can be composed of a plurality of heat absorbing panels 110 and a heat insulating panel 120 as shown in FIG. The first engaging portions 114 are respectively disposed at opposite ends of each heat absorbing plate 110, and the heat insulating plate 120 has a plurality of second plate bodies 122 as shown in FIG. 2, respectively corresponding to the first plate body of the heat absorbing plate 110. 112. Specifically, any two adjacent second plates 122 are connected by their corresponding second engaging portions 124, and the first engaging portions 114 of the heat absorbing plates 110 are respectively associated with the corresponding second engaging portions 124. The plurality of heat absorbing plates 110 are fastened to each other adjacent to the heat insulating plate 120 to form a plurality of independent flow paths. In detail, each of the second engaging portions 124 may include an extending groove 124a and a hooking groove 124b that communicate with each other, and each of the first engaging portions 114 may include an extending portion 114a and a hooking portion 114b that are connected to each other. Each of the extending sections 114a is located in the corresponding extending slot 124a, and each of the hooking sections 114b is connected to the corresponding extending section 114a to be engaged in the corresponding hooking slot 124b, and is matched with the corresponding hooking slot 124b to The heat absorbing panels 110 are fastened to each other adjacent to the heat insulating panel 120. Further, the extending portion 114a of any two adjacent heat absorbing plates 110 is embedded in the same extending groove 124a, and the hooking portion 114b connecting the extending portion 114a is matched with the corresponding hooking groove 124b. The two adjacent heat absorbing panels 110 are fastened to the heat insulation board 120.

In this embodiment, the solar collector 100 may further include a plurality of fillers 140 disposed in the hooking grooves 124b and located between the hooking segments 114b of the adjacent two heat absorbing plates 110 and the corresponding hooking grooves 124b. To further fix the adjacent two heat absorbing plates 110 A mating relationship with the heat shield 120. In this embodiment, the filler 140 may comprise a hardener, a sealant or a cassette. Each of the latches may be embedded between the hooking section 114b of the adjacent two heat absorbing panels 110 and the corresponding hooking groove 124b to enhance the structural strength of the solar collector 100 and the combination between the heat absorbing panel 110 and the heat insulating panel 120. Force and prevent the heat transfer fluid from overflowing under working pressure.

Of course, the present embodiment is not limited to the number of the heat absorbing plate 110 and the heat insulating plate 120 of the solar collector 100. In other embodiments of the present invention, the solar collector may also be a heat absorbing plate 110 and One heat insulation board 120 is composed of a plurality of heat absorption boards 110 and a plurality of heat insulation boards 120. As long as the first engaging portion 114 of the heat absorbing plate 110 can be firmly engaged with the second engaging portion 124 of the heat insulating panel 120.

In addition, in the embodiment, the first plate body 112 and the second plate body 122 are all curved plates to increase their tolerance to the working pressure of the heat transfer liquid. Specifically, each of the first plate bodies 112 and the corresponding second plate body 122 have the same arc direction. In other words, each of the first plate bodies 112 and the corresponding second plate body 122 may be curved plates parallel to each other. body. In general, the curved plate body will be more stressed than the flat plate body, because any part of the curved plate body is forced to spread evenly around the circumference. Moreover, the arc directions of the first plate body 112 of the present embodiment and the corresponding second plate body 122 are the same, which not only enhances the structural strength and pressure resistance of the solar collector 100, but also further reduces the solar collector 100. Overall thickness. At the same time, the first plate body 112 is a curved plate body, which can also increase the contact area with the heat transfer liquid, thereby increasing the heat transfer efficiency. In addition, the second plate body 122 may also be a curved plate body. The structural strength of the solar collector 100 in the longitudinal direction D1.

Figure 3 is a graph showing the stress distribution of the solar collector of Figure 2 after application of internal pressure. 3 shows the stress distribution of the solar collector 100 of the present embodiment after applying an internal fluid pressure of 6 kg per square centimeter (6 kgf/cm ² ) in a separate flow path defined by the heat absorbing plate 110 and the heat shield 120. Figure. In detail, the upper diagram in FIG. 3 shows a stress distribution diagram of the solar collector 100a of a heat insulating plate made of a thermoplastic resin such as ABS resin after applying an internal fluid pressure of 6 kgf/cm ² , and FIG. 3 The figure below shows the stress distribution of the solar collector 100b of the composite material of the thermal insulation board, such as FRP, after applying an internal fluid pressure of 6 kgf/cm ² . It has been experimentally confirmed that the solar collector 100 of the present embodiment can withstand an internal fluid pressure of at least 6 kgf/cm ² , and at this pressure, the displacement of the first plate body 112 and the second plate body 122 is extremely small.

In view of the above, in particular, the maximum displacement of the first plate body 112 and the second plate body 122 of the solar collector 100a at an internal fluid pressure of 6 kgf/cm ² is about 0.28 mm (mm) to 2.59 mm, and The maximum stress experienced by a plate 112 is about 2122 MPa, which is much less than the stress that causes permanent deformation of the stainless steel. Similarly, the maximum displacement of the first plate 112 and the second plate 122 of the solar collector 100b under the above pressure is about 0.1 mm to 1.42 mm, and the maximum stress of the first plate 112 is about 1494 MPa. It is also much less than the stress that causes the permanent deformation of the stainless steel. Moreover, the Young's modulus of the solar collectors 100a, 100b of the present embodiment is higher than 20 GPa, and it is confirmed that it also has good structural strength in the longitudinal direction D1. Therefore, the solar collector 100 of the present embodiment does have excellent structural strength and pressure resistance.

4 is a partially enlarged schematic view of the solar collector of FIG. 1. Figure 5 is a cross-sectional view of the solar collector of Figure 4 taken along line B-B'. Referring to FIG. 4 and FIG. 5 simultaneously, in the embodiment, the solar collector 100 may further include a connecting pipe 130 connecting and covering one side of the heat absorbing plate 110 and the heat insulating plate 120. In detail, the connecting pipe 130 may include a plurality of holes 132 that are disposed corresponding to the heat collecting flow path CH to communicate the heat collecting flow path CH so that the heat transfer liquid can flow into or out of the heat collecting flow path CH via the holes 132. The solar collector 100 of the present embodiment can be applied, for example, to a solar water heater to convert solar radiant energy absorbed by the solar collector 100 into thermal energy to hot water. The connecting pipe 130 may include a water inlet 134 and a water outlet 136. The heat transfer liquid flows into the heat collecting flow path CH through the water inlet 134 of the connecting pipe 130 as indicated by an arrow in FIG. 4, and flows out of the heat collecting flow path CH after collecting heat energy, and The solar collector 100 flows out through the water outlet 136 of the connection pipe 130.

Of course, the configuration of the connecting tube 130 is not limited to the above, and the connecting tube 130 can also be disposed on opposite sides of the heat absorbing plate 110 and the heat insulating plate 120, respectively, to communicate with opposite ends of the heat collecting flow path CH. The heat transfer liquid may flow from the connection pipe 130 at one end of the heat collection flow path CH, and flow out of the solar energy collector 100 from the connection pipe 130 at the other end of the heat collection flow path CH after absorbing heat energy. The invention does not limit the number of connecting tubes 130 and their location.

Fig. 6 is a partially enlarged schematic cross-sectional view showing a heat absorbing plate according to an embodiment of the present invention. Referring to FIG. 6 , in the present embodiment, the solar collector 100 further includes a solar selective absorbing film 150 covering the illuminating surface S of the heat absorbing plate 110 . Solar selectivity The absorbing film 150 may include a damping layer 152, an absorbing layer 154, and an anti-reflective layer 156, sequentially covering the directional surface S. That is, the damping layer 152 covers the light-emitting surface S, the absorption layer 154 covers the damping layer 152, and the anti-reflection layer 156 covers the absorption layer 154. The damping layer 152 may be formed on the incident surface S, for example, by sputtering, and the material may include metal nitride, metal carbide, metal carbon nitride, or the like. Specifically, the material of the damping layer 152 may be selected, for example, from zirconium nitride (ZrN), titanium nitride (TiN), titanium aluminum nitride (TiAlN), chromium nitride (CrN), titanium carbide (TiC), carbonization. One of chromium (CrC), titanium carbonitride (TiCN), titanium aluminum carbonitride (TiAlCN), zirconium carbonitride (ZrCN), chromium carbonitride (CrCN), or any combination thereof.

In addition, the absorbing layer 154 may also be formed on the damping layer 152 by sputtering. The material of the absorbing layer 154 includes a metal oxide and a metal nitride, a metal carbide or a metal carbonitride. In other words, the material of the absorbing layer 154 can be obtained by mixing the metal oxide of the material of the damping layer 152. The anti-reflective layer 156 may be formed on the absorber layer 154 in a deposition manner, the material of which may include tantalum oxide or tantalum nitride. Of course, the materials of the damping layer 152, the absorbing layer 154 and the anti-reflective layer 156 described above are for illustrative purposes only, and the invention is not limited thereto. Thus, by depositing the solar selective absorbing film 150 on the illuminating surface S, sunlight can enter the absorbing layer 154 and the damping layer 152 via the anti-reflective layer 156, and the radiant energy of the sunlight can be converted into heat energy via the absorbing layer 154. . This thermal energy can then be conducted to the heat transfer liquid via the heat absorbing plate 110.

Figure 7 is a schematic illustration of an additional structure of a building in accordance with an embodiment of the present invention. Please refer to FIG. 1 and FIG. 7 at the same time. In this embodiment, the additional structure of the building 10 is adapted to be disposed in an exterior space of a building. The building add-on structure 10 includes at least one frame 200 and a plurality of solar collectors 100 as shown in FIGS. 1 through 6. The frame 200 is used to frame the solar collectors 100, and the solar collectors 100 are disposed in the frame 200 in parallel with each other. The frame 200 includes a plurality of transparent front covers 210 respectively disposed on the front side of the solar collector 100 facing the heat absorbing plate 110 as shown in FIG. 1 to cover the heat absorbing plate 110. The frame 200 may also include a plurality of transparent back covers 220 respectively disposed on the rear side of the solar collector 100 facing the heat insulation board 120 as shown in FIG. 1 to cover the heat insulation board 120. It should be noted that the present embodiment is for illustrative purposes only, and the present invention does not limit the number and size of the solar collectors 100 that can be disposed in the frame 200.

8A to 8C are schematic views showing the disassembly and assembly of components of a transparent sleeve and a solar collector according to an embodiment of the present invention. Referring to FIG. 8A to FIG. 8C simultaneously, in the embodiment, the frame 200 includes a plurality of transparent sleeves 230 for being respectively sleeved on the solar collector 100 as shown in FIGS. 1 to 6 and the transparent sleeve 230. For one-piece molding. The transparent sleeve defines an accommodation space, and the solar collector 100 is assembled and disposed in the accommodation space. In the present embodiment, the material of the transparent sleeve 230 includes a non-glass material, and more specifically, the material of the transparent sleeve 230 may be plastic. The solar collector 100 can also include a plurality of reinforcing sheets 235 disposed between the heat shield 120 and the transparent sleeve 230 for structural support thereof. In the present embodiment, the solar collector 100 has a longitudinal length L1 of about 245 cm, a lateral width W1 of about 20 cm, and a height H1 of about 4.5 cm. In addition, the lateral width of the heat absorbing plate 110 and the heat insulating plate 120 after assembly is about 18 cm. Of course, this embodiment is for illustrative purposes only, and the present invention does not limit the specific dimensions of the solar collector 100.

9 through 11 are schematic views of the application of additional structures of a building in accordance with various embodiments of the present invention. Referring to FIG. 9, the solar collector 100 described above can be modularized as an additional structure of a building, which is disposed on an outer surface of a building to absorb the radiant energy of the sun and convert it into heat to heat the building. Water for living, or as a source of heating for buildings. For example, the above-mentioned building additional structure 10 may include a frame 200 and a plurality of solar collectors 100 as described above, as shown in FIG. 9, the frame 200 may be used to frame the accommodating space, and the solar collector 100 may be It is disposed in the accommodating space of the frame 200. In particular, the solar collectors 100 can be disposed on the frame 200, for example, in parallel with one another to form a discontinuous wall surface, thereby increasing the area of the building add-on structure 10 that can absorb solar energy. The additional structure 10 of the building can be disposed, for example, on an exterior surface of the building that is exposed to sunlight, such that the additional structure 10 of the building can be used not only as a sunshade structure, but also to absorb and convert the radiant energy of the sun. It is heat energy to heat the building's domestic water or as a heating source for buildings.

Referring first to FIG. 9, in the present embodiment, the exterior surface provided by the building additional structure 10 may be a balcony or a terrace of the building, and the additional structure 10 of the building may be disposed on the outer edge of the balcony or the terrace. Used as a fence for a balcony or terrace. In addition, referring again to FIG. 10 and FIG. 11, in the present embodiment, the external surface provided by the additional structure 10 of the building may be a roof of a building, a window, a terrace or an open space adjacent to the building (for example, a building) Open space in the front yard, backyard or arcade). The building additional structure 10 can be disposed on the outer surface as described above to serve as a sunshade structure or a shelter structure of the building. For example, if the building additional structure 10 is provided Placed on the window of a building, it can be used as a sunshade blind, and the building additional structure 10 can be used as the balcony, front yard or backyard if it is installed on the balcony, front yard or backyard of the building. For awnings. In this way, the building additional structure 10 as an external sunshade structure can reduce the solar radiant heat and the sun light entering the room through the external wall of the building, or provide the sunshade for the open space adjacent to the building, and on the other hand, absorb the building itself and the surrounding area. The received solar energy actively cools the building. Therefore, the building additional structure 10 of the present invention can have a more excellent cooling effect on the building than the conventional external sunshade structure. Moreover, the building attachment structure 10 can also convert solar radiant heat into thermal energy to heat the building's domestic water or as a source of heating for the building.

In summary, the heat absorbing plate and the heat insulating plate of the solar collector of the present invention are fastened to each other with a spacing therebetween to jointly define a heat collecting flow path for the heat conducting liquid to flow therethrough. Further, the heat transfer coefficient of the heat absorbing plate is substantially 30 times or more of the heat transfer coefficient of the heat insulating plate. In this way, the thermal energy of the sunlight can be effectively transmitted to the heat transfer liquid in the heat collecting flow passage through the heat absorbing plate having a high heat transfer coefficient, and the heat insulating property of the heat insulating plate can be utilized to effectively prevent the heat energy from being lost. Moreover, the solar collector of the present invention has the characteristics of light weight, high structural strength and high heat collecting efficiency, so that the volume and thickness of the heat insulating board and the outer casing can be effectively reduced while maintaining the structural strength and the heat insulating effect. Therefore, the solar collector of the present invention not only has good solar energy collection efficiency, but also has an effective reduction in volume and overall thickness. Therefore, the wind resistance of the solar collector can also be relatively reduced.

In addition, the solar collector of the present invention can also be modularized as a building The additional structure of the object is to arrange a plurality of solar collectors in the frame to modularize the solar collector to increase the efficiency of solar energy collection. The solar energy collection system of the present invention can be disposed, for example, on an exterior surface of a building to absorb solar energy that is exposed to the building and convert it into thermal energy for use within the building. Therefore, the present invention does increase the application and design flexibility of solar collectors in building integration.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ solar collector

110‧‧‧heat absorbing plate

112‧‧‧First board

114‧‧‧First engagement

114a‧‧‧Extension

114b‧‧‧Combined paragraph

120‧‧‧heat insulation board

122‧‧‧Second plate

124‧‧‧Second engagement department

124a‧‧‧Stretching slot

124b‧‧‧ hooking slot;

140‧‧‧Filling

CH‧‧‧Heat collection runner

G1‧‧‧ spacing

Claims (17)

A solar collector comprising: a heat absorbing plate comprising: a first plate body; and a plurality of first engaging portions connected to the first plate body; and a heat insulating plate comprising: a second plate body; a plurality of second engaging portions are connected to the second plate body, wherein the first engaging portions are respectively engaged with the second engaging portions, and the first plate body and the second plate body are maintained The spacing is to form a heat collecting flow path for a heat transfer liquid to flow through the heat collecting flow channel, and the heat transfer coefficient of the heat absorbing plate is more than 30 times the heat transfer coefficient of the heat insulating plate. The solar collector of claim 1, further comprising a plurality of connecting pipes connected to and connected to the heat collecting flow path. The solar collector of claim 2, wherein each of the connecting tubes comprises a plurality of channels communicating with the heat collecting channels for the heat conducting liquid to flow into or out of the heat through the holes of the connecting tubes Collect the flow path. The solar collector of claim 1, wherein each of the second engaging portions includes an extending groove communicating with each other and a hooking groove, each of the first engaging portions including an extending portion and a hooking Each of the extension segments is located in a corresponding extension slot, and each of the hooking segments is connected to the corresponding extension slot and is fitted into the corresponding hooking slot, and The corresponding hooking grooves are hooked to fix the heat absorbing plates adjacent to each other on the heat insulating plate. The solar collector of claim 4, further comprising a plurality of fillers respectively disposed in the hooking slots and located between the hooking sections of the adjacent two heat absorbing panels and the corresponding hooking slots . The solar collector of claim 5, wherein the filler comprises a cassette, a hardener or a sealant. The solar collector of claim 1, wherein each of the first plate body and each of the second plate bodies is a curved plate body, and an arc of each of the first plate body and the corresponding second plate body The shape direction is the same. The solar collector of claim 1, further comprising a solar selective absorbing film covering the illuminating surface of the heat absorbing plate. A building additional structure adapted to be disposed on an exterior surface of a building, the additional structure comprising: a plurality of solar collectors as described in claim 1; and a frame for enclosing the solar energy collection The solar collectors are disposed in parallel with each other within the frame. The additional structure of the building according to claim 9, wherein the frame comprises: a plurality of transparent front covers respectively covering the corresponding heat absorbing plates; and a plurality of transparent back covers respectively covering the corresponding heat insulating plates. The building additional structure of claim 9, wherein the frame comprises a plurality of transparent sleeves respectively sleeved on the solar collectors, the transparent sleeves being integrally formed. The building additional structure of claim 11, wherein the material of the transparent sleeve is a non-glass material. The additional structure of the building according to claim 11, wherein the material of the transparent sleeve is plastic. The building attachment structure of claim 9, wherein the exterior surface comprises a balcony or a terrace of the building. The building attachment structure of claim 14, wherein the additional structure is a fence disposed on an outer edge of the balcony or terrace. The building attachment structure of claim 9, wherein the exterior surface comprises a roof, a window, a terrace or an open space adjacent to the building. The building attachment structure of claim 16, wherein the additional structure is a sunshade structure or a shielding structure disposed on the roof, the window, the terrace or the open space adjacent to the building.