Solar heat collector based on flat plate micro heat pipe

Abstract

The invention discloses a solar heat collector based on a flat plate micro heat pipe, and relates to the technical field of solar heat utilization, the solar heat collector comprises a heat collection box body, a heat collection pipe and the flat plate micro heat pipe, the heat collection box body is obliquely arranged on the ground; the heat collecting pipe is arranged in the heat collecting box body, the two ends of the heat collecting pipe are arranged on the two sides of the heat collecting box body, one end of the heat collecting pipe is a water inlet, and the other end of the heat collecting pipe is a water outlet. The flat plate micro heat pipes are arranged at intervals along the axis of the heat collecting pipe, and each flat plate micro heat pipe comprises an evaporation section and a condensation section; the condensation section is in an arc shape and is arranged on the peripheral side of the heat collection pipe in an attached mode, the circle center of the condensation section is located on the axis of the heat collection pipe, and the condensation section heats the heat collection pipe; the evaporation section is positioned below the condensation section; the method has the effect of improving the heat conduction efficiency.

Description

Technical Field

[0001] This application relates to the technical field of solar thermal utilization, and particularly to a solar collector based on flat micro heat pipes. Background Art

[0002] As a device for efficiently utilizing solar energy, solar collectors are widely used in fields such as hot water supply, heating, and power generation. With the increasing global energy demand and the enhancement of environmental awareness, the development of solar energy technology has received extensive attention. Solar collectors absorb solar radiant energy and convert it into heat energy, providing a clean and renewable energy solution for humans, which is of great significance for alleviating the energy crisis and reducing environmental pollution. In this field, researchers in various countries have continuously explored innovative designs to improve the heat collection efficiency and reduce costs, thereby promoting the popularization and application of solar energy technology.

[0003] In solar collectors (such as flat plate collectors and vacuum tube collectors), the design of the heat collection pipes affects multiple aspects such as fluid flow, heat transfer performance, pressure loss, installation and maintenance. Straight heat collection pipes have the advantages of small flow resistance, more uniform flow, easy control of flow distribution, lower manufacturing and installation costs, and convenient cleaning and maintenance. However, their heat transfer capacity is limited, and the local temperature gradient is relatively large. The folded and bent heat collection pipes can improve fluid disturbance. The fluid continuously mixes during the folding process and reaches a turbulent state, making it not easy to form local overheating, and the system temperature distribution is more uniform, improving the heat utilization rate. However, the fluid flow resistance of the folded and bent heat collection pipes is relatively large, the manufacturing difficulty is high, the bent pipe part is prone to fouling, and the cleaning and maintenance are relatively complex. If the design is unreasonable, local low-speed areas or eddy current regions may also be formed in the folded and bent pipes, affecting the heat transfer effect.

[0004] Therefore, how to achieve efficient heat transfer using low-cost straight heat collection pipes has become a technical problem to be solved urgently. Summary of the Invention

[0005] In order to solve the problem of improving the heat conduction efficiency, this application provides a solar collector based on flat micro heat pipes.

[0006] This application provides a solar collector based on flat micro heat pipes, adopting the following technical solutions: A solar collector based on flat micro heat pipes, comprising a heat collection box body, which is inclined and arranged on the ground; heat collection pipes, which are arranged in the heat collection box body, both ends of the heat collection pipes are arranged on both sides of the heat collection box body, one end of the heat collection pipe is the water inlet, and the other end of the heat collection pipe is the water outlet; Flat micro heat pipes, a plurality of which are arranged at intervals along the axis of the heat collecting pipe, and each flat micro heat pipe includes an evaporation section and a condensation section; The condensation section is arc-shaped and is attached to the periphery of the heat collecting pipe, and the condensation section heats the heat collecting pipe; The evaporation section is located at the lower end of the condensation section.

[0007] By adopting the above technical solution, during use, a phase change medium (such as a refrigerant like acetone) is filled into the flat micro heat pipe. The phase change medium is liquid at normal temperature and accumulates at the bottom of the evaporation section under the action of gravity. After the heat collecting box is irradiated by solar energy, the heated phase change medium evaporates into gas in the evaporation section and rises to the condensation section, where it contacts the low-temperature heat collecting pipe for heat exchange. After heat exchange, it condenses into liquid and flows back to the evaporation section along the wall of the flat micro heat pipe to achieve a heat cycle. When the phase change medium is in laminar flow or weak turbulent flow, the phase change medium in the heat collecting pipe is unevenly heated, and the local temperature gradient is large, resulting in unstable outlet temperature. The condensation section is designed to be arc-shaped and wraps the heat collecting pipe to ensure that the phase change medium in the heat collecting pipe is evenly heated, making the outlet temperature more stable.

[0008] Optionally, the central angle of each condensation section is the same, and the projections of adjacent condensation sections on the vertical plane of the axis of the heat collecting pipe do not completely overlap.

[0009] By adopting the above technical solution, the condensation sections are evenly distributed on the periphery of the heat collecting pipe, avoiding the uneven heat transfer between the condensation sections, thereby improving the heating efficiency of the liquid in the heat collecting pipe. At the same time, the setting that the projections of the condensation sections on the vertical plane of the axis of the heat collecting pipe do not completely overlap can effectively increase the contact area between the condensation sections and the heat collecting pipe, further improving the heat conduction effect.

[0010] Optionally, the central angle of each condensation section is 180 degrees; and the projections of adjacent condensation sections on the vertical plane of the axis of the heat collecting pipe are symmetrically distributed.

[0011] By adopting the above technical solution, the central angle of the condensation section is set to 180 degrees, increasing the contact area between the condensation section and the heat collecting pipe, thereby improving the heat transfer efficiency and ensuring that the liquid in the heat collecting pipe can be evenly heated. The symmetric distribution of the projections of adjacent condensation sections on the vertical plane of the axis of the heat collecting pipe further improves the distribution of thermal energy, avoiding problems such as local overheating or uneven heating, and improving the energy conversion efficiency of the overall collector.

[0012] Optionally, a heat insulation layer is fixedly arranged in the heat collecting box. The bottom of the heat insulation layer is fixedly arranged at the bottom of the heat collecting box, and the upper end of the heat insulation layer wraps the flat micro heat pipe.

[0013] By adopting the above technical solution, the bottom of the thermal insulation layer is fixed to the bottom of the heat collection box body, forming a stable structural support, ensuring that the thermal insulation layer will not displace or fall off during long-term use, thereby maintaining a good thermal insulation effect. The upper end of the thermal insulation layer semi-wraps the flat micro heat pipe, further reducing the heat conduction loss to the external environment, improving the heat utilization rate, and enabling the heat collector to achieve higher thermal energy output with lower energy loss.

[0014] Optionally, a plurality of microchannels are arranged in parallel for each of the flat micro heat pipes.

[0015] By adopting the above technical solution, a plurality of microchannels are arranged in parallel for each flat micro heat pipe, enabling heat to be transferred more evenly to the liquid in the heat collection pipe, thereby improving the overall heat exchange efficiency. At the same time, by setting a plurality of mutually separated microchannels, the flow path of the phase change medium can be dispersed, reducing the mutual interference between the channels in the evaporation section. This structure realizes the optimization of the liquid reflux distribution, ensuring smoother liquid flow and thus promoting the efficient transfer of heat in the flat micro heat pipe.

[0016] Optionally, each of the microchannels is a capillary micropore channel, and the diameter of the capillary micropore channel is 2 mm - 20 mm.

[0017] By adopting the above technical solution, the setting of the capillary micropore channel can significantly improve the capillary liquid absorption capacity inside the flat micro heat pipe, making the circulation of the phase change medium between the evaporation section and the condensation section smoother. The capillary micropore channel is set between 2 - 20 mm, which not only ensures the fluidity of the channel but also effectively increases the contact area of the medium, thereby improving the heat conduction efficiency.

[0018] Optionally, the flow velocity of the liquid in the heat collection pipe is 0.05 m / s - 0.1 m / s.

[0019] By adopting the above technical solution, the liquid in the heat collection pipe flows at a speed of 0.05 m / s - 0.1 m / s, changing the flow state of the phase change medium, avoiding the problem of insufficient heat exchange caused by too low a flow velocity and the energy loss caused by too high a flow velocity. It can ensure that the phase change medium forms a stable turbulent state in the heat collection pipe, thereby improving the heat transfer efficiency.

[0020] Optionally, the heat collection box body includes a lower box body and an upper box body buckled on the upper end of the lower box body. The upper box body is horizontally provided with an installation groove, the peripheral side of the lower box body is provided with a matching cavity, the side wall of the matching cavity is horizontally provided with a guiding groove, and the heat collection box body is provided with a glass cover plate through a mounting member. The mounting member includes: A closing part, which is arranged in the matching cavity. Both sides of the closing part are slidably arranged in the guiding groove, and the closing part closes the installation groove; A pushing part is arranged on the periphery of the upper box body, and the pushing part pushes the glass cover plate to move.

[0021] By adopting the above technical solution, the installation groove of the box body, the matching cavity of the lower box body and the guiding groove jointly form a stable installation structure for the glass cover plate. The closing part is slidably arranged in the guiding groove, which can effectively close the installation groove, ensure the sealing performance of the glass cover plate and prevent heat dissipation. The pushing part is arranged on the periphery of the upper box body. By pushing the glass cover plate to move, the convenient opening and closing of the glass cover plate is realized, so that when the glass cover plate is damaged, it can be replaced in time, thereby further improving the heat transfer efficiency of the collector.

[0022] Optionally, the closing part includes: A bolt that sequentially passes through the upper box body and the lower box body and fixes the lower box body and the lower box body; A first airbag fixedly arranged in the upper box body, and the first airbag corresponds to the position of the bolt; A first connecting pipe, one end of which is fixedly arranged on the periphery of the first airbag, and the first connecting pipe is communicated with the first airbag; A pushing pipe, one end of which is fixedly arranged on the first connecting pipe; A first closing plate slidably arranged in the matching cavity; A second closing plate rotatably connected to the first closing plate through a rotating shaft, and the second closing plate is slidably arranged in the matching cavity; A spring arranged in the pushing pipe, one end of the spring is fixedly arranged at one end of the first connecting pipe close to the pushing pipe, and the other end of the spring is fixedly arranged at one end of the first closing plate close to the pushing pipe; Rollers are fixedly arranged on both sides of the first closing plate and the second closing plate, and the rollers are slidably arranged in the guiding groove, wherein rollers are fixedly arranged on both sides of the rotating shaft.

[0023] By adopting the above technical solution, the closing part fixes the upper box body and the lower box body through bolts to realize the stable connection of the heat collection box body. The first airbag corresponds to the position of the bolt, and the first airbag can be synchronously compressed when the bolt is tightened, so as to push the first closing plate and the second closing plate to slide along the guiding groove through the first connecting pipe and the pushing pipe, and finally realize the opening of the installation groove. The setting of the spring can provide additional thrust to ensure that the closing plate can slide smoothly along the installation groove. The use of rollers reduces the friction between the closing plate and the guiding groove, making the closing and opening actions smoother. The rollers on both sides of the rotating shaft further improve the flexibility and stability of the second closing plate.

[0024] Optionally, the pushing part includes: The second airbag, which is fixed to the first airbag and is arranged on the side of the first airbag away from the bolt; The second connecting pipe, one end of which is communicated with the second airbag; The telescopic rod, the fixed end of which is fixedly arranged on one side of the upper box body, the telescopic rod is symmetrically arranged with the matching cavity, and the telescopic end of the telescopic rod contacts the glass cover plate.

[0025] By adopting the above technical scheme, the setting of the telescopic rod can effectively push the glass cover plate to move, ensuring that the installation position of the glass cover plate on the heat collection box body is accurate and stable. At the same time, the combined use of the second airbag and the first airbag can adjust the internal pressure through the expansion and contraction of the airbag when the upper and lower box bodies are fixed by bolts, so as to push the glass cover plate out of the upper box body, which is convenient for replacing the glass cover plate and increases the heat exchange efficiency.

[0026] In summary, the embodiment of the present invention provides a solar collector based on flat micro heat pipes, including at least one of the following beneficial technical effects: 1. When in use, the phase change medium is filled into the flat micro heat pipe. The phase change medium is liquid at normal temperature and accumulates at the bottom of the evaporation section under the action of gravity. After the heat collection box body is irradiated by solar energy, the heated phase change medium evaporates into gas in the evaporation section and rises to the condensation section, where it contacts the low-temperature heat collection pipe for heat exchange, and then condenses into liquid and flows back to the evaporation section along the flat micro heat pipe wall to realize the heat cycle. In traditional linear heat collection pipes, the phase change medium is mainly in a laminar or weak turbulent state. After the phase change medium is heated, a thermal gradient is formed along the radial direction of the pipe. The temperature in the area near the pipe wall is relatively high, while the temperature in the center area of the pipe is relatively low, resulting in low heat exchange efficiency and a large local temperature gradient. By designing the structure of the condensation section as an arc shape and wrapping the heat collection pipe from both sides, the heat absorption uniformity of the phase change medium can be effectively improved, thus significantly enhancing the heat exchange efficiency of the heat collection pipe.

[0027] 2. The setting of the condensation section makes the contact between the flat micro heat pipe and the heat collection pipe more fitting, effectively increasing the contact area between the two, thus significantly improving the heat transfer efficiency. In addition, it can ensure that heat is evenly conducted from the flat micro heat pipe to the heat collection pipe, reducing heat loss and further improving the overall heat exchange performance of the solar collector.

[0028] 3. The liquid in the heat collection pipe flows at a speed of 0.05m / s - 0.1m / s, changing the flow state of the phase change medium, avoiding the problem of insufficient heat exchange caused by too low flow rate and energy loss caused by too high flow rate. It can ensure that the phase change medium forms a stable turbulent state in the heat collection pipe, thereby improving the heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0030] Figure 1 Schematic structural diagram of a solar collector based on a flat micro heat pipe provided by an embodiment of the present invention; Figure 2 Exploded view of a solar collector based on a flat micro heat pipe provided by an embodiment of the present invention; Figure 3 Schematic structural diagram of a flat micro heat pipe in a solar collector based on a flat micro heat pipe provided by an embodiment of the present invention; Figure 4 Schematic structural diagram of a microchannel in a solar collector based on a flat micro heat pipe provided by an embodiment of the present invention; Figure 5 Schematic structural diagram of a mounting member in a solar collector based on a flat micro heat pipe provided by an embodiment of the present invention; Figure 6 For Figure 5 Enlarged view of part A in Figure 7 Cross-sectional view of a closing part in a solar collector based on a flat micro heat pipe provided by an embodiment of the present invention; Figure 8 For Figure 5 Enlarged view of part B in Figure 9 Cross-sectional view of a pushing part in a solar collector based on a flat micro heat pipe provided by an embodiment of the present invention.

[0031] Explanation of the markings in the figure: Heat collection box body; 11, heat collection pipe; 12, flat micro heat pipe; 121, condensation section; 122, evaporation section; 14, heat insulation layer; 15, microchannel; 16, absorption coating; 17, glass cover plate; 2, closing part; 21, bolt; 22, first airbag; 23, first connecting pipe; 24, pushing pipe; 25, first closing plate; 26, second closing plate; 28, roller; 3, pushing part; 31, second airbag; 32, second connecting pipe; 33, telescopic rod; 34, installation groove; 35, matching cavity; 36, guiding groove. Specific embodiments

[0032] The following will further describe the present application in detail with reference to Figure 1 -9.

[0033] Embodiment 1

[0034] Combined with Figure 1 、 Figure 2 and Figure 3 , an embodiment of the present application discloses a solar collector based on a flat micro heat pipe 12, including a heat collection box body 1, a heat collection pipe 11, and a flat micro heat pipe 12. The heat collection box body 1 is inclined and arranged on the ground; the heat collection pipe 11 is arranged inside the heat collection box body 1, and both ends of the heat collection pipe 11 are arranged on both sides of the heat collection box body 1. One end of the heat collection pipe 11 is a water inlet, and the other end of the heat collection pipe 11 is a water outlet; the flat micro heat pipe 12 is fixedly arranged on the periphery of the heat collection pipe 11. Among them, a plurality of flat micro heat pipes 12 are arranged at intervals along the axis of the heat collection pipe 11, and each flat micro heat pipe 12 includes an evaporation section 122 and a condensation section 121; the condensation section 121 is arc-shaped, and the condensation section 121 is attached to the periphery of the heat collection pipe 11, and the condensation section 121 heats the heat collection pipe 11; the evaporation section 122 is located at the lower end of the condensation section 121.

[0035] In the embodiment of the present application, the heat collection box body 1 is square-shaped. The square-shaped heat collection box body 1 has a larger area, can lay more flat micro heat pipes 12, and the heat density per unit area is increased. At the same time, the square structure is convenient for arranging the heat insulation layer 14, and the heat loss on the side can be controlled within 1%. Therefore, the square-shaped setting of the heat collection box body 1 can better improve the heat collection efficiency of the solar collector.

[0036] Combined with Figure 3 and Figure 4 , the upper ends of the flat micro heat pipes 12 and the ends fixed to the heat collection pipe 11 are both condensation sections 121, and the condensation sections 121 are attached to the periphery of the heat collection pipe 11. Each flat micro heat pipe 12 is provided with a plurality of microchannels 15 in parallel. Among them, the flat micro heat pipe 12 is formed by welding, stamping or extrusion of a metal material. The radian of the condensation section 121 just fits the heat collection pipe 11. It should be noted that the central angle of each condensation section 121 is the same, and the projections of adjacent condensation sections 121 in the vertical direction of the axis of the heat collection pipe 11 do not completely overlap. The central angle of each condensation section 121 is 180 degrees; and the projections of adjacent condensation sections 121 are symmetrically distributed in the vertical plane of the axis of the heat collection pipe 11. That is, a plurality of flat micro heat pipes 12 are arranged at intervals one above the other on the periphery of the heat collection pipe 11. One flat micro heat pipe 12 is attached to one side of the heat collection pipe 11, and another flat micro heat pipe 12 is arranged on the side opposite to the position of one of the flat micro heat pipes 12. At the same time, the axes of the two flat micro heat pipes 12 are on the same straight line. In this way, a plurality of flat micro heat pipes are arranged in sequence on the heat collection pipe 11. The material of the flat micro heat pipe 12 is aluminum alloy with good ductility and thermal conductivity. Among them, the evaporation section 122 is located at the lower end of the condensation section 121, and the evaporation section is straight-shaped. The evaporation section 122 is communicated with the condensation section 121 and is integrally arranged. That is to say, the condensation section 121 is bent from the upper end of the flat micro heat pipe 12.

[0037] It should be noted that each flat micro heat pipe 12 is provided with a plurality of microchannels 15. Each microchannel 15 is a capillary micropore channel, and the diameter of the capillary micropore channel is 2 mm - 20 mm. The specific surface area can reach 5000 - 50000 m² / m³ (only about 100 m² / m³ for conventional devices), greatly increasing the heat exchange area. Among them, the setting of the microchannels 15 increases the contact area between the phase change medium and the tube wall during the flow process, thereby improving the heat exchange efficiency. By setting a plurality of mutually separated microchannels 15, the flow path of the phase change medium can be dispersed, reducing the mutual interference between the channels in the evaporation section. This structure realizes the optimization of the liquid reflux distribution, ensuring that the liquid flows more smoothly and thus promoting the efficient transfer of heat in the flat micro heat pipe 12. The inner wall of the microchannel 15 is provided with micro fins, increasing the surface area of the inner wall of the microchannel 15, significantly expanding the contact area with the fluid, and effectively accelerating the phase change rate of the fluid, thereby further improving the heat collection efficiency. Each microchannel 15 is subjected to vacuum pumping and filling with a phase change medium, and the filled phase change medium is a refrigerant.

[0038] In specific use, cold water enters from the water inlet of the heat collection tube 11, then undergoes heat exchange through the flat micro heat pipe 12 and the temperature rises, and flows out from the water outlet. Since there is liquid refrigerant placed in the flat micro heat pipe 12, therefore, the liquid refrigerant in the flat micro heat pipe 12 absorbs solar energy and evaporates into a gas state. Due to the decrease in density, the gaseous refrigerant rises along the microchannel 15 to the condensation section 121 and exchanges heat with the cold water in the heat collection tube 11. At this time, condensation occurs between the cold water and the gaseous refrigerant. The condensed liquid flows back to the bottom of the flat micro heat pipe 12 under the action of gravity, and then absorbs solar energy again to vaporize. By repeating the above steps, the cold water in the heat collection tube 11 is heated, and thus heat transfer can be continuously carried out through the flat micro heat pipe 12. Finally, the heated water flow is transported to the user through the heat collection tube 11, thereby improving the heat collection efficiency of the solar collector.

[0039] Looking back Figure 2 , a heat insulation layer 14 is fixedly arranged inside the heat collection box body 1. The bottom of the heat insulation layer 14 is fixedly arranged at the bottom of the heat collection box body 1, and the upper end of the heat insulation layer 14 wraps the flat micro heat pipe 12. An absorption coating 16 is arranged on the upper surface of the flat micro heat pipe 12.

[0040] In the embodiment of the present application, the heat insulation layer 14 is glass wool with low thermal conductivity, heat insulation, non-combustible, heat-resistant, frost-resistant, and corrosion-resistant. This setting effectively reduces heat loss and improves the overall efficiency of the collector. In addition, a glass cover plate 17 is arranged at the upper end of the heat collection box body 1. The heat collection box body 1 and the glass cover plate 17 form a closed structure, and they are sealed and connected through a sealing rubber ring, effectively preventing the entry of external air and maintaining an internal vacuum environment, further improving the heat insulation effect.

[0041] Specifically, an absorption coating 16 is provided on the upper surface of the flat micro heat pipe 12. This coating uses a heat-absorbing blue film with a high solar absorptivity and a low thermal emissivity, and its thickness is about 5μm - 10μm. The preparation method of the heat-absorbing blue film can adopt chemical vapor deposition or magnetron sputtering, and can be specifically selected according to process conditions. A glass cover plate 17 is covered above the absorption coating 16. The glass cover plate 17 is made of ultra-white light-transmitting tempered glass with a thickness of 3mm, and an anti-reflection layer is coated on the surface to ensure a high light transmittance. The glass cover plate 17 is hermetically connected to the heat collection box body 1 through a sealing rubber ring, effectively preventing external air from entering, maintaining an internal vacuum environment, and further improving the heat preservation effect.

[0042] In a specific application example, the flow velocity of the liquid in the heat collection pipe 11 is 0.05m / s - 0.1m / s.

[0043] The implementation principle of this embodiment is as follows: When sunlight shines on the glass cover plate 17, the light passes through the glass cover plate 17 and reaches the absorption coating 16. The absorption coating 16 converts solar radiation into heat energy, and the phase change medium inside the flat micro heat pipe 12 is heated and evaporated, and the heat is quickly transferred to the heat collection pipe 11 through the microchannel 15. The water flow in the heat collection pipe 11 flows in a turbulent state under the action of a pump, takes away the heat and transfers it to the user. The heat exchange efficiency of the solar collector is significantly improved, and efficient and stable heat transfer is achieved.

[0044] Embodiment Two

[0045] Combined with Figure 5 、 Figure 6 and Figure 7 , the difference between this embodiment and Embodiment One is that the heat collection box body 1 includes a lower box body and an upper box body buckled on the upper end of the lower box body. The upper box body is horizontally provided with an installation groove 34, the peripheral side of the lower box body is provided with a matching cavity 35, the side wall of the matching cavity 35 is horizontally provided with a guiding groove 36, the heat collection box body 1 is provided with a glass cover plate 17 through a mounting member, and the mounting member includes: a closing part 2 and a pushing part 3. The closing part 2 is arranged in the matching cavity 35, and both sides of the closing part 2 are slidably arranged in the guiding groove 36, and the closing part 2 closes the installation groove 34; the pushing part 3 is arranged on the peripheral side of the upper box body, and the pushing part 3 pushes the glass cover plate 17 to move.

[0046] In the embodiment of the present application, both the lower box body and the upper box body are square-shaped. It should be noted that both the upper box body and the lower box body are hollow, that is, an installation space will be formed after the upper box body and the lower box body are buckled. The installation groove 34 is rectangular, and the specification of the installation groove 34 is convenient for the glass cover plate 17 to move. The matching cavity 35 is square, and the matching cavity 35 enables the closing part 2 to open or close the matching cavity 35. The guiding groove 36 is L-shaped to guide the movement of the closing part 2. It should be noted that the width of the heat collection box body 1 is greater than the width of the glass cover plate 17 and also greater than the width of the installation groove 34. That is, a groove for the glass cover plate 17 to slide out is provided on one side of the heat collection box body 1.

[0047] During specific use, the upper box body and the lower box body are buckled to form the heat collection box body 1. At the same time, the closing part 2 closes the installation groove 34. Since the glass cover plate 17 slides in the installation groove 34, when the glass cover plate 17 needs to be replaced, the closing part 2 is driven to slide in an L shape under the guiding action of the guiding groove 36 to open the installation groove 34, and then the pushing part 3 is started, so that the pushing part 3 pushes the glass cover plate 17 towards the end away from the pushing part 3, so that the glass cover plate 17 slides out of the installation groove 34, thereby realizing the replacement of the glass cover plate 17. It should be noted that two groups of pushing parts 3 are symmetrically arranged along the width direction of the glass cover plate 17, so that the glass cover plate 17 is evenly stressed when being pushed.

[0048] Combined with Figure 6 and Figure 7, wherein the closing part 2 includes a bolt 21, a first airbag 22, a first connecting pipe 23, a pushing pipe 24, a first closing plate 25, a second closing plate 26, and a spring. The bolt 21 passes through the upper box body and the lower box body in sequence to fix the lower box body and the lower box body; the first airbag 22 is fixedly arranged in the upper box body, and the first airbag 22 corresponds to the position of the bolt 21; one end of the first connecting pipe 23 is fixedly arranged on the periphery of the first airbag 22, and the first connecting pipe 23 is communicated with the first airbag 22; one end of the pushing pipe 24 is fixedly arranged on the first connecting pipe 23; the first closing plate 25 is slidably arranged in the fitting cavity 35; the second closing plate 26 is rotatably connected with the first closing plate 25 through a rotating shaft, and the second closing plate 26 is slidably arranged in the fitting cavity 35; the spring is arranged in the pushing pipe 24, one end of the spring is fixedly arranged at one end of the first connecting pipe 23 close to the pushing pipe 24, and the other end of the spring is fixedly arranged at one end of the first closing plate 25 close to the pushing pipe 24; rollers 28 are fixedly arranged on both sides of the first closing plate 25 and the second closing plate 26, the rollers 28 are slidably arranged in the guiding groove 36, and rollers 28 are fixedly arranged on both sides of the rotating shaft. It should be noted that two groups of the bolt 21, the first airbag 22, the first connecting pipe 23, and the pushing pipe 24 are symmetrically arranged along the width direction of the glass cover plate 17, so that when the installation groove 34 is opened, the first closing plate 25 and the second closing plate 26 are uniformly stressed, and the distance between the two pushing pipes 24 is greater than the width of the glass cover plate 17, that is, when the installation groove 34 is opened and the glass cover plate 17 moves in the installation groove 34, the pushing pipe 24 does not hinder the movement of the glass cover plate 17.

[0049] Combined with Figure 6 , Figure 8 and Figure 9 , the pushing part 3 includes a second airbag 31, a second connecting pipe 32, and a telescopic rod 33. The second airbag 31 is fixed to the first airbag 22, and the second airbag 31 is arranged on the side of the first airbag 22 away from the bolt 21; one end of the second connecting pipe 32 is communicated with the second airbag 31; the fixed end of the telescopic rod 33 is fixedly arranged on one side of the upper box body, the telescopic rod 33 is symmetrically arranged with the fitting cavity 35, and the telescopic end of the telescopic rod 33 contacts the glass cover plate 17.

[0050] In the embodiment of the present application, inert gas is provided in the first airbag 22 and the second airbag 31. The connection between the first airbag 22 and the second airbag 31 has a certain hardness. That is, when the bolt 21 presses the first airbag 22, the extrusion force received by the second airbag 31 is not sufficient to support the movement of the telescopic rod 33. Only when the bolt 21 continuously approaches the second airbag 31, the second airbag 31 receives the extrusion force of the bolt 21, and the inert gas is pushed into the telescopic rod 33. Among them, the hardness requirement at the connection between the first airbag 22 and the second airbag 31 is set according to the specific use scenario. The push tube 24 is a corrugated tube, which can be elongated or shortened without affecting the passage of gas. The first closing plate 25 and the second closing plate 26 are arranged in a square plate shape and are rotatably connected through a rotating shaft, allowing the first closing plate 25 and the second closing plate 26 to adjust the angle as needed during the movement, so as to better adapt to the shape of the installation groove 34. The first connecting pipe 23 and the second connecting pipe 32 are both circular pipes, which can be made of rigid materials or corrosion-resistant materials, and are specifically set according to the usage situation. With the spring provided, when the first airbag 22 is inflated, the push tube 24 elongates under the action of air pressure, and the spring is stretched, thereby pushing the first closing plate 25 to slide along the guide groove 36. An elastic pad is provided at one end of the telescopic rod 33 in contact with the glass cover plate 17. The elastic pad provides a buffering effect to prevent the glass cover plate 17 from being damaged when the telescopic rod 33 pushes the glass cover plate 17 to move.

[0051] The upper box body is buckled with the lower box body. It should be noted that a glass cover plate 17 is installed on the upper box body. The glass cover plate 17 can be fixed on the upper box body by embedding. After the upper box body and the lower box body are buckled, the installation groove 34 and the mating cavity 35 are communicated, that is, the glass cover plate 17 can be pushed out through the installation groove 34.

[0052] The implementation principle of the embodiment of this application is as follows: After the upper box body and the lower box body are buckled, bolts 21 are used to fix the upper box body and the lower box body. At this time, the bolts 21 do not squeeze the first airbag 22. When the glass cover plate 17 needs to be replaced, the bolts 21 are further tightened, so that the bolts 21 squeeze the first airbag 22. The inert gas in the first airbag 22 enters the push tube 24 through the first connecting tube 23, and the push tube 24 elongates. At the same time, the spring in the push tube 24 is stretched, pushing the first closing plate 25 and the second closing plate 26 to move downward. Due to the setting of the rollers 28, the resistance of the first closing plate 25 and the second closing plate 26 during downward movement is reduced. When the first closing plate 25 and the second closing plate 26 move downward, the second closing plate 26 moves horizontally in the guide groove 36, and the first closing plate 25 moves vertically in the guide groove 36. And when the second closing plate 26 is in a horizontal state and the first closing plate 25 is in a vertical state, the installation groove 34 is opened, that is, the installation groove 34 communicates with the matching cavity 35, so as to facilitate the glass cover plate 17 to be pushed out. At this time, the bolts 21 are further tightened, so that the bolts 21 squeeze the second airbag 31. The inert gas in the second airbag 31 enters the telescopic rod 33 through the second connecting tube 32, and the telescopic rod 33 elongates, thereby pushing the glass cover plate 17 to move away from the telescopic rod 33 at one end in the installation groove 34 to facilitate the replacement of the glass cover plate 17. Furthermore, the heat exchange efficiency of the collector is improved.

[0053] This specific embodiment is only an interpretation of this application, and it is not a limitation of this application. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A solar collector based on a flat micro heat pipe, characterized in that, Comprising: A heat collection box body (1), the heat collection box body (1) is inclined and arranged on the ground; Heat collection pipes (11), the heat collection pipes (11) are arranged in the heat collection box body (1), both ends of the heat collection pipes (11) are arranged on both sides of the heat collection box body (1), one end of the heat collection pipes (11) is a water inlet, and the other end of the heat collection pipes (11) is a water outlet; Flat micro heat pipes (12), a plurality of the flat micro heat pipes (12) are arranged at intervals along the axis of the heat collection pipes (11), and the flat micro heat pipes (12) include an evaporation section (122) and a condensation section (121); The condensation section (121) is arc-shaped, the condensation section (121) is attached to the periphery of the heat collection pipes (11), and the condensation section (121) heats the heat collection pipes (11); The evaporation section (122) is located at the lower end of the condensation section (121).

2. The solar collector based on a flat micro heat pipe according to claim 1, characterized in that The central angle of each condensation section (121) is the same, and the projections of adjacent condensation sections (121) on the perpendicular to the axis of the heat collection pipes (11) do not completely overlap.

3. The solar collector based on a flat micro heat pipe according to claim 2, characterized in that: The central angle of each condensation section (121) is 180 degrees; and the projections of adjacent condensation sections (121) on the vertical plane of the axis of the heat collection pipes (11) are symmetrically distributed.

4. A solar collector based on a flat micro heat pipe according to claim 1, characterized in that: A heat preservation layer (14) is fixedly arranged in the heat collection box body (1), the bottom of the heat preservation layer (14) is fixedly arranged at the bottom of the heat collection box body (1), and the upper end of the heat preservation layer (14) wraps the flat micro heat pipes (12).

5. A solar collector based on a flat micro heat pipe according to claim 1, characterized in that, A plurality of microchannels (15) are arranged in parallel for each flat micro heat pipe (12).

6. The solar collector based on a flat micro heat pipe according to claim 5, characterized in that, Each microchannel (15) is a capillary micropore channel, and the diameter of the capillary micropore channel is 2 mm - 20 mm.

7. A solar collector based on a flat micro heat pipe according to claim 1, characterized in that, The flow velocity of the liquid in the heat collection pipes (11) is 0.05 m / s - 0.1 m / s.

8. A solar collector based on a flat micro heat pipe according to claim 1, characterized in that, The heat collection box body (1) includes a lower box body and an upper box body buckled on the upper end of the lower box body. The upper box body is horizontally provided with an installation groove (34), the periphery of the lower box body is provided with a matching cavity (35), the side wall of the matching cavity (35) is horizontally provided with a guiding groove (36), and the heat collection box body (1) is provided with a glass cover plate (17) through an installation member. The installation member includes: A closing part (2), the closing part (2) is arranged in the matching cavity (35), both sides of the closing part (2) are slidably arranged in the guiding groove (36), and the closing part (2) closes the installation groove (34); A pushing part (3), the pushing part (3) is arranged on the periphery of the upper box body, and the pushing part (3) pushes the glass cover plate (17) to move.

9. A solar collector based on a flat micro heat pipe according to claim 8, characterized in that, The closing part (2) includes: A bolt (21), the bolt (21) passes through the upper box body and the lower box body in sequence to fix the lower box body and the lower box body; A first airbag (22), the first airbag (22) is fixedly arranged in the upper box body, and the first airbag (22) corresponds to the position of the bolt (21); The first connecting pipe (23), one end of the first connecting pipe (23) is fixedly arranged on the periphery of the first airbag (22), and the first connecting pipe (23) is communicated with the first airbag (22); The push pipe (24), one end of the push pipe (24) is fixedly arranged on the first connecting pipe (23); The first closing plate (25), the first closing plate (25) is slidably arranged in the fitting cavity (35); The second closing plate (26), the second closing plate (26) is rotatably connected with the first closing plate (25) through a rotating shaft, and the second closing plate (26) is slidably arranged in the fitting cavity (35); The spring, the spring is arranged in the push pipe (24), one end of the spring is fixedly arranged at one end of the first connecting pipe (23) close to the push pipe (24), and the other end of the spring is fixedly arranged at one end of the first closing plate (25) close to the push pipe (24); Both sides of the first closing plate (25) and the second closing plate (26) are fixedly provided with rollers (28), and the rollers (28) are slidably arranged in the guide groove (36), wherein both sides of the rotating shaft are fixedly provided with rollers (28).

10. A solar collector based on a flat micro heat pipe according to claim 9, characterized in that, The pushing part (3) includes: The second airbag (31), the second airbag (31) is fixed to the first airbag (22), and the second airbag (31) is arranged on the side of the first airbag (22) away from the bolt (21); The second connecting pipe (32), one end of the second connecting pipe (32) is communicated with the second airbag (31); The telescopic rod (33), the fixed end of the telescopic rod (33) is fixedly arranged on one side of the upper box body, the telescopic rod (33) is symmetrically arranged with the fitting cavity (35), and the telescopic end of the telescopic rod (33) contacts the glass cover plate (17).

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