Self-power-generation concrete street lamp pole based on thermoelectric effect

Abstract

The self-power-generation concrete street lamp pole based on the thermoelectric effect comprises a street lamp pole body, and the street lamp pole body comprises a lower supporting section which is of a columnar structure made of traditional concrete and provides a mechanical supporting function; the middle functional section is made of a composite gravel material with a passive refrigeration function and forms a remarkable temperature difference with the external environment through passive refrigeration; an upper heat collection section; a heat collection assembly is assembled to actively absorb solar radiation to form a high-temperature section; the thermoelectric conversion module comprises at least one group of thermoelectric power generation units which are arranged at the joint interface of the middle functional section and the upper heat collection section and are used for converting the temperature difference into electric energy; according to the passive refrigeration system made of the composite gravel material, the temperature of the cold end is continuously maintained to be lower than the environment temperature without external energy, the stable temperature difference is formed between the cold end and the heat collection section, the temperature is efficiently converted into electric energy through the thermoelectric effect, and full-passive conversion from the material temperature difference to the lighting energy is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of street lamps, in particular to a self-generating concrete street lamp pole based on thermoelectric effect. BACKGROUND

[0002] To solve the energy dependence problem of traditional street lamps, solar photovoltaic street lamps have become the current mainstream new energy replacement scheme, which converts solar radiation into electrical energy through photovoltaic panels, stores it in energy storage batteries, and then powers the lighting unit, achieving a certain degree of "off-grid self-generation". But the technical defects of photovoltaic street lamps are also significant: first, the heat collection efficiency is greatly affected by the environment, and the photoelectric conversion efficiency of the photovoltaic panel depends on sufficient direct sunlight. When it is foggy or in winter, the power generation drops by more than 50%, and even cannot meet the night lighting demand; second, the photovoltaic panel needs to be accurately designed and installed at an angle to match the sun's track, and the surface is easy to accumulate dust and snow, which needs to be cleaned and maintained regularly, SUMMARY

[0003] The purpose of the present application is to provide a self-generating concrete street lamp pole based on thermoelectric effect to solve the problems raised in the background.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a self-generating concrete street lamp pole based on thermoelectric effect, comprising a street lamp pole main body, the street lamp pole main body comprising: a lower support section: a columnar structure made of traditional concrete, providing mechanical support function; a middle functional section: made of composite sandstone material with passive refrigeration function, forming a significant temperature difference with the outside environment through passive refrigeration; an upper heat collection section: equipped with a heat collection assembly to actively absorb solar radiation and form a high-temperature section; a thermoelectric conversion module: at least one thermoelectric power generation unit arranged at the junction interface between the middle functional section and the upper heat collection section, for converting temperature difference into electrical energy; an energy storage system: an electrical energy storage device electrically connected to the thermoelectric conversion module, for collecting and storing generated electrical energy; a lighting unit: a lighting assembly electrically connected to the energy storage system, using stored electrical energy to provide night lighting; The heat collection assembly includes a heat collection cylinder and a triangular column, the heat collection cylinder is embedded in the middle of the upper heat collection section, the triangular column is a hollow structure and is sleeved outside the heat collection cylinder, each end face of the triangular column is equipped with a glass plate, forming a greenhouse effect heat collection structure; a plurality of heat conducting pieces are arranged in the heat collection cylinder, the heat conducting pieces are connected to the hot end of the thermoelectric conversion module, a plurality of through holes are formed in the heat collection cylinder and communicated with the triangular column.

[0005] Further, the triangular column is embedded with a plurality of Fresnel lens units at equal intervals along the length of each triangular side, a plug is slidably assembled on the through hole, shape memory alloy springs and bias springs are arranged on both sides of the plug respectively, the other end of the shape memory alloy spring is connected with the inner wall of the triangular column, the other end of the bias spring is connected with the inner wall of the heat collecting cylinder, the optical axis of the Fresnel lens unit is deflected by 15-30 degrees towards the central axis of the triangular column, and the focused light spot is projected onto the surface of the shape memory alloy spring.

[0006] Further, the inner wall of the heat collecting cylinder is provided with a plurality of heat conducting grooves filled with phase change material.

[0007] Further, the composite sandstone material comprises a white cement matrix, a barium sulfate filler, a hydrogel network and a moisture absorption salt component, the middle functional section is in a tapered structure with a narrow upper part and a wide lower part, and the surface of the middle functional end is provided with a spiral twill, and the tangent direction of the spiral twill forms an angle of 30-45 degrees with the horizontal plane.

[0008] Further, the cold end of the thermoelectric conversion module is bonded with a heat sink, and a hollow heat conducting channel is formed in the middle of the middle functional end, and the heat dissipation fins of the heat sink are arranged in the heat conducting channel.

[0009] Further, the cross section of the heat conducting channel is in a honeycomb structure to increase the heat exchange area, and the fin array of the heat sink is embedded in the honeycomb heat conducting channel to form an interference fit passive heat dissipation system.

[0010] Further, the upper heat collecting section is provided with a cleaning assembly, the cleaning assembly comprises two groups of wind wheels, the two groups of wind wheels are rotatably arranged on the upper and lower sides of the upper heat collecting section respectively, each wind wheel is provided with a support frame, a sliding rod is arranged on the support frame, a sliding seat is slidably arranged on the sliding rod, a return spring is sleeved on the sliding rod and connected between the inner wall of the support frame and the sliding seat, and a cleaning roller is connected between the upper and lower sliding seats and abuts against the surface of the triangular column.

[0011] Compared with the prior art, the present application has the following advantages: The present application has the advantages of compact structure and reasonable design, through the cooperative design of the triangular column greenhouse effect and the passive refrigeration of the middle functional section, the system realizes the existence of significant temperature difference of the cold and hot ends of the contact conductor under the condition of no external energy, and even under the condition of insufficient light, the intrinsic radiation refrigeration and humidity response characteristics of the material can still maintain the low temperature end stably; The Fresnel lens of the upper heat collecting section and the shape memory alloy linkage mechanism can intelligently adjust the heat exchange efficiency with the change of sunlight, and the composite sandstone material can continuously maintain the low temperature through the closed loop mechanism of "reflection-evaporation-humidity absorption", and the two cooperate to form an effective temperature difference of 30 DEG C or above.

[0012] The greenhouse structure composed of the triangular column and the glass plate can efficiently capture scattered light and convert it into heat, and the phase change material in the heat collecting cylinder (heat storage in the daytime and heat release at night) is used; in the low temperature environment in winter, the composite sandstone material can continuously maintain the low temperature of the cold end by virtue of the high reflective surface and the self-regulating evaporative cooling, and can still stably form a temperature difference, and the thermoelectric conversion module continuously generates electricity, thereby completely solving the pain point of the photovoltaic street lamp "generating electricity by looking at the sky".

[0013] The present application realizes the full life cycle autonomy of energy utilization, from photothermal conversion and temperature difference power generation in the daytime to slow release and heat storage of the phase change material at night, and the whole system forms a complete energy closed loop, which can fully utilize the strong sunlight in the daytime and can cope with the sharp temperature drop at night, and has excellent reliability; in addition, the integrated wind-driven cleaning assembly is provided, the cleaning roller is driven by the wind wheel to slide along the triangular column glass plate in a self-adaptive manner, and the cleaning roller can automatically wipe dust and snow without any manual intervention; and the closed structure of the triangular column reduces the entry of dust, and further reduces the cleaning demand. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a schematic view of a self-generating concrete street lamp pole structure based on the thermoelectric effect according to the present application; Figure 2 FIG. 2 is a sectional view of a self-generating concrete street lamp pole based on the thermoelectric effect according to the present application; Figure 1 FIG. 3 is an enlarged view of part A in FIG. 2; Figure 3 FIG. 4 is a top view of a heat collecting assembly based on the thermoelectric effect according to the present application; Figure 4 FIG. 5 is a sectional view of the heat collecting assembly based on the thermoelectric effect according to the present application. Figure 5 FIG. 5 is a sectional view of the heat collecting assembly based on the thermoelectric effect according to the present application.

[0015] In the figure, the lower support section-1, the middle functional section-2, the upper heat collecting section-3, the lighting unit-4, the heat collecting cylinder-5, the triangular column-6, the glass plate-7, the heat conducting part-8, the through hole-9, the Fresnel lens unit-10, the blocking block-11, the shape memory alloy spring-12, the biasing spring-13, the heat conducting groove-14, the spiral twill-15, the heat sink-16, the wind wheel-17, the support frame-18, the sliding rod-19, the sliding seat-20, the return spring-21, the cleaning roller-22, and the thermoelectric conversion module-23. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0017] As shown in Figures 1 to 5 A self-generating concrete street lamp pole based on thermoelectric effect, comprising a street lamp pole body, the street lamp pole body comprising: A lower support section 1: a columnar structure made of traditional concrete, providing mechanical support function; A middle functional section 2: made of composite sandstone material with passive refrigeration function, forming significant temperature difference with the external environment through passive refrigeration; An upper heat collection section 3: equipped with heat collection components to actively absorb solar radiation and form a high-temperature section; A thermoelectric conversion module 23: the core of the thermoelectric conversion module 23 is to convert temperature difference into electrical energy by using the "Seebeck effect": at least one set of thermoelectric power generation units is arranged at the junction interface of the middle functional section 2 (cold end, maintained at low temperature by passive refrigeration) and the upper heat collection section 3 (hot end, maintained at high temperature by active heat collection), when there is a significant temperature difference between the hot end and the cold end, the carriers (electrons or holes) in the thermoelectric power generation units will move directionally due to the temperature difference, forming a potential difference, and then generating an electric current, completing the conversion of "thermal energy - electrical energy".

[0018] An energy storage system: an electrical energy storage device electrically connected to the thermoelectric conversion module 23, for collecting and storing generated electrical energy; A lighting unit 4: an LED lighting component electrically connected to the energy storage system, providing night lighting using stored electrical energy; The heat collection components include a heat collection cylinder 5 and a triangular column 6, the heat collection cylinder 5 is embedded in the middle of the upper heat collection section 3, the triangular column 6 is a hollow structure and is sleeved outside the heat collection cylinder 5, each end face of the triangular column 6 is equipped with a glass plate 7, forming a greenhouse effect heat collection structure; a plurality of heat conduction pieces 8 are arrayed in the heat collection cylinder 5, the heat conduction pieces 8 are connected to the hot end of the thermoelectric conversion module 23, a plurality of through holes 9 are formed in the heat collection cylinder 5 and communicate with the triangular column 6; Sunlight can penetrate the glass plate 7 into the interior of the triangular column 6, while infrared rays formed by the absorption of heat by the internal air are difficult to escape through the glass plate 7, achieving heat accumulation, at the same time, the through holes 9 on the heat collection cylinder 5 enable the hot air in the triangular column 6 to enter the heat collection cylinder 5, and in combination with the arrayed heat conduction pieces 8 in the heat collection cylinder 5, the heat is quickly transferred to the hot end of the thermoelectric conversion module 23.

[0019] At night, the ambient temperature drops, and the temperature inside the triangular prism 6 will inevitably begin to drop, but the "blocking effect" of the glass plate 7 still exists - it will reflect part of the long-wave radiation emitted by the heat collector 5, just like the film of a greenhouse, while avoiding direct convection exchange between external cold air and internal hot air, thereby slowing down the rate of internal heat loss, so that the temperature inside the triangular prism 6 can be kept warm for a longer period of time.

[0020] In this embodiment, a plurality of Fresnel lens units 10 are embedded in the triangular prism 6 at equal intervals along the length of each triangular side, and a plug 11 is slidingly fitted on the through hole 9, with a shape memory alloy spring 12 and a bias spring 13 respectively arranged on both sides of the plug 11, the other end of the shape memory alloy spring 12 being connected to the inner wall of the triangular prism 6, and the other end of the bias spring 13 being connected to the inner wall of the heat collector 5, the optical axis of the Fresnel lens unit 10 being deflected by 15°-30° towards the central axis of the triangular prism 6, and the focused light spot being projected onto the surface of the shape memory alloy spring 12; During the day, the Fresnel lens unit 10 focuses sunlight into a high-energy light spot and accurately projects it onto the surface of the shape memory alloy spring 12. At this time, the memory alloy spring 12 absorbs the heat of the focused light spot, and the temperature rises above its "phase change temperature threshold", triggering the shape memory effect - from the initial state (relaxation) to contraction and shortening. Since the memory alloy spring 12 is connected to the inner wall of the triangular prism 6 at one end and to the plug 11 at the other end, its contraction will cause the plug 11 to slide away from the heat collector 5 (outward), while pulling open the bias spring 13 on the other side; this action directly opens the through hole 9 on the heat collector 5: the hot air (temperature higher than the heat collector 5) accumulated inside the triangular prism 6 due to the greenhouse effect can quickly flow into the heat collector 5 through the through hole 9, in combination with the heat-conducting piece 8 inside the heat collector 5, to efficiently transfer heat to the hot end of the thermoelectric conversion module 23; at the same time, the opening of the through hole 9 also allows more complete convection of hot air inside the triangular prism 6, accelerating the warming of the heat collector 5, ultimately strengthening the temperature difference between the hot end and the middle functional end (cold end), and improving the thermoelectric conversion efficiency.

[0021] At night, when the solar radiation disappears, the Fresnel lens no longer focuses heat, and the temperature of the shape memory alloy spring 12 drops below the "phase transition threshold" with the environment, returning to the initial relaxed state. At this time, the biased spring 13 that has been pulled begins to reset, pulling the plug 11 to slide back to the direction of the heat collecting cylinder 5, completely blocking the through hole 9; this closed structure can significantly reduce the heat loss of the heat collecting cylinder 5: on the one hand, it blocks the air convection between the triangular prism 6 and the heat collecting cylinder 5 (to prevent the heat in the heat collecting cylinder 5 from spreading to the outside low-temperature environment through air flow); on the other hand, combined with the phase change material in the heat conducting groove 14 on the inner wall of the heat collecting cylinder 5 (which releases the heat stored during the day at night), the temperature drop speed of the heat collecting cylinder 5 can be greatly slowed down, ensuring that it can still maintain a higher temperature level than the middle functional end at night, continuously providing a stable temperature difference for the thermoelectric conversion module 23.

[0022] In this embodiment, the inner wall of the heat collecting cylinder 5 is provided with a plurality of heat conducting grooves 14, which are filled with phase change materials (such as lauric acid-expanding graphite composite phase change material); the phase change material in the heat conducting groove 14 on the inner wall of the heat collecting cylinder 5 absorbs and stores a large amount of heat (latent heat of phase change) during the day, and slowly releases the stored heat when the temperature of the heat collecting cylinder 5 drops at night, offsetting part of the heat loss and preventing the temperature of the heat collecting section from dropping sharply.

[0023] In this embodiment, the composite sandstone material contains white cement matrix, barium sulfate filler, hydrogel network and hygroscopic salt components; Because solar radiation (especially visible light and near-infrared light) is the main heat source, the higher the reflectivity of the material to this part of the light, the less the heat absorbed, and the better the refrigeration basis. This function is mainly realized by barium sulfate and white cement together: High diffuse reflection characteristics of barium sulfate: barium sulfate is a typical high-refractive-index inorganic powder, with a reflectivity of visible light (400-760 nm) and near-infrared light (760-2500 nm) of more than 90%, and can diffuse the incident light in all directions through "Mie scattering" (rather than specular reflection), avoiding local heat concentration; In addition, the night refrigeration effect of barium sulfate is better than that of the day, which is mainly due to its unique thermodynamic characteristics and synergistic effect with the environment: at night without solar radiation interference, the high-efficiency infrared radiation capability of barium sulfate can fully release heat to space, while the high relative humidity at night promotes surface condensation and evaporation; while the residual heat effect of solar radiation and air convection and other factors during the day will weaken its refrigeration performance, this enhanced refrigeration effect just compensates for the temperature drop of the upper heat collecting section 3 due to the loss of solar radiation at night, through the dynamic balance of "colder cold end, slower hot end", successfully maintaining the temperature difference threshold required for power generation, ensuring the stable operation of the system throughout the day.

[0024] White cement's auxiliary reflection and skeleton support: White cement itself is white, and has basic reflection effect on solar radiation; more importantly, the rigid hydration product formed after its hydration will build a three-dimensional skeleton, "fixing" and uniformly dispersing barium sulfate particles and hydrogel particles — this uniform dispersion can avoid barium sulfate agglomeration, maximize its reflection area, and thus continuously reduce the material's absorption of solar heat; When the material absorbs heat from the environment, it needs to be cooled through "heat dissipation", and the core heat dissipation method of the material is the evaporation of water in the hydrogel (physical process: when water changes from liquid to gas, it absorbs heat from the surrounding environment, reducing the surface temperature of the material), and the efficiency of this process is determined by the structure design of the hydrogel: High water retention capacity of hydrogel: Hydrogel (formed by precursor, coagulant and water) is a three-dimensional network structure that can encapsulate a large amount of water (water retention rate can usually reach several to dozens of times its own weight), providing "water reserves" for continuous evaporation.

[0025] There is a key defect in the simple evaporation of hydrogel: once the internal water is evaporated, the refrigeration function will stop (it needs to rely on external water such as rainfall, which has poor sustainability). The addition of hygroscopic salt solves this problem by continuously replenishing water for the hydrogel through "hygroscopic - dehumidification cycle" to achieve a closed loop of the refrigeration process: Hygroscopic process (replenish water): When the ambient humidity is high (such as at night, on cloudy days or after rain), the hygroscopic salt (such as calcium chloride, lithium chloride, etc.) in the material will absorb water vapor from the air through "chemical hygroscopicity" or "physical hygroscopicity"; these absorbed water will be captured and stored by the surrounding hydrogel network structure, replenishing the "evaporation water source" for the hydrogel.

[0026] Dehumidification process (for evaporation heat dissipation): When the ambient temperature rises and the humidity decreases (such as sunny days), the hygroscopicity of the hygroscopic salt decreases, and the temperature of the material rises due to the absorption of solar radiation (even with high reflectivity, there is still a small amount of heat absorption) — at this time, the water stored in the hydrogel will evaporate and absorb heat again, and the water absorbed by the hygroscopic salt will also be desorbed and participate in evaporation, continuously providing water for heat dissipation.

[0027] Cyclic characteristics: As long as there is "humidity fluctuation" in the environment (day and night, alternating sunny and rainy days will inevitably exist), the hygroscopic salt can continuously "hygroscopic - dehumidification", replenishing water for the hydrogel, so that the evaporation and heat dissipation process can continue without external energy driving, achieving "sustainable passive refrigeration".

[0028] Thus, through the synergistic mechanism of "reducing heat absorption - active heat dissipation - circulating water replenishment", it can achieve passive refrigeration without external energy, so that the temperature inside the middle functional end is significantly lower than the ambient temperature, and the cold end temperature is always stable in the range of 15-20°C lower than the ambient temperature; while the upper heat collection section 3 maintains the hot end temperature in the range of 20-30°C higher than the ambient temperature through the greenhouse effect and phase change heat storage, finally forming a stable temperature difference of 35-50°C between the two ends of the thermoelectric conversion module 23.

[0029] The middle functional section 2 is in a tapered structure with a narrow upper part and a wide lower part, and the surface of the middle functional end is provided with a spiral slope 15, and the tangent direction of the spiral slope forms an angle of 30°-45° with the horizontal plane. 30°-45° tangent angle: This angle range is the key to balance the reflection efficiency of "low-angle light" and "high-angle light"; for the low-angle light in the morning / afternoon (the incident direction is close to the horizontal plane): the 30°-45° slope 15 can form a "inclined plane mirror" effect, avoiding the vertical irradiation of the rod body (vertical irradiation is easy to be absorbed), and deflecting the light "upward" to the high altitude through the tangent direction of the slope 15 (reducing secondary radiation on the ground and reducing heat absorption of the rod body itself); For the high-angle light at noon (the incident direction is close to vertical downward): this angle can avoid the "diffuse reflection" of the light along the surface of the rod body (diffuse reflection will cause part of the light to be absorbed by the rod body), and direct the light away from the rod body, further reducing heat absorption.

[0030] In addition, the middle functional section 2 is set to a tapered structure with a narrow upper part and a wide lower part, because if the rod body is a "cylindrical with equal diameter", when the sun shines, a fixed shadow area will be formed on the back light side of the rod body - the shadow area has no light irradiation, although it does not directly absorb heat, but it will cause the "uneven heating" of the surface of the rod body (the temperature on the sunny side is high, and the temperature on the back light side is low), which may cause material thermal stress cracking in the long term; at the same time, the existence of the shadow area will limit the reflection of the spiral slope 15 to the sunny side, reducing the overall light reflection efficiency.

[0031] The "tapered structure with small upper part and large lower part" can reduce the fixed shadow area through "inclined plane transition": when the sunlight irradiates, the inclined plane of the tapered structure will make the shadow area change dynamically with the sun angle (rather than being fixed in a certain area), which not only avoids local overheating, but also ensures that the spiral slope 15 on the whole circumference of the rod body can contact the light (or indirectly use the light through the inclined plane reflection), improving the overall light reflection uniformity.

[0032] In the embodiment, the cold end of the thermoelectric conversion module 23 is bonded with the heat sink 16, the middle functional end is formed with a hollow heat conduction channel, and the heat dissipation fins of the heat sink 16 are arranged in the heat conduction channel; the cross section of the heat conduction channel is in a honeycomb structure to increase the heat exchange area; the fin array of the heat sink 16 is embedded in the honeycomb heat conduction channel to form an interference fit passive heat dissipation system. The static air layer in the honeycomb heat conduction channel is like a natural heat insulation barrier, which is perfectly matched with the special composite sandstone material of the middle functional section 2. The metal fins of the heat sink 16 are tightly attached to the inner wall of the channel through interference fit to continuously guide out the cold end temperature; and the hexagonal honeycomb structure divides the air into countless closed cells to effectively block heat convection.

[0033] In the embodiment, the upper heat collection section 3 is provided with a cleaning assembly, which includes two groups of wind wheels 17 rotatably arranged on the upper and lower sides of the upper heat collection section 3, each wind wheel 17 is provided with a support frame 18, a sliding rod 19 is arranged on the support frame 18, a sliding seat 20 is slidably arranged on the sliding rod 19, a reset spring 21 is sleeved on the sliding rod 19 and connected between the inner wall of the support frame 18 and the sliding seat 20, and a cleaning roller 22 is connected between the sliding seats 20 on the upper and lower sides and abuts against the surface of the triangular column 6.

[0034] When the wind blows, the wind wheels 17 rotate under the action of wind force, driving the support frame 18 to rotate as a whole around the axis of the upper heat collection section 3; in the rotating process of the support frame 18, the cleaning roller 22 moves around the triangular column 6 synchronously with the support frame 18, and at the same time, since the sliding seat 20 can freely slide along the sliding rod 19 with an adaptive inclination angle, when the cleaning roller 22 contacts the inclined surface of the triangular column 6, the sliding seat 20 will automatically adjust its position on the sliding rod 19, thereby automatically adapting to the change of the shape of the triangular column 6, so that the cleaning roller 22 is always tightly abutted against the glass surface (without being separated or locally subjected to excessive force due to the inclination of the inclined surface); in addition, the reset spring 21 sleeved on the sliding rod 19 provides the sliding seat 20 with continuous pre-tightening force, further ensuring the adhesion of the cleaning roller 22 to the surface of the triangular column 6, avoiding loosening and missing cleaning of the cleaning roller 22 due to wind fluctuation, and avoiding dust on the glass plate 7 from blocking light to affect the greenhouse effect heat collection, thereby maintaining the heat collection efficiency of the upper heat collection section 3.

[0035] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A self-generating concrete road lamp pole based on thermoelectric effect, characterized in that: The street lamp pole body comprises: Lower support section: a columnar structure made of traditional concrete, providing mechanical support function; Middle functional section: made of composite sandstone material with passive refrigeration function, forming significant temperature difference with the outside environment through passive refrigeration; Upper heat collection section: equipped with heat collection components to actively absorb solar radiation and form a high-temperature section; Thermoelectric conversion module: at least one set of thermoelectric power generation unit arranged at the junction interface of the middle functional section and the upper heat collection section, for converting temperature difference into electrical energy; Energy storage system: an electrical energy storage device electrically connected to the thermoelectric conversion module, for collecting and storing generated electrical energy; Illumination unit: a lighting component electrically connected to the energy storage system, providing night lighting using stored electrical energy; The heat collection component includes a heat collection cylinder and a triangular column, the heat collection cylinder is embedded in the middle of the upper heat collection section, the triangular column is a hollow structure and is sleeved outside the heat collection cylinder, each end face of the triangular column is equipped with a glass plate to form a greenhouse effect heat collection structure; a plurality of heat conducting members are arranged in the heat collection cylinder, the heat conducting members are connected to the hot end of the thermoelectric conversion module, a plurality of through holes are formed in the heat collection cylinder and are communicated with the triangular column.

2. A self-generating concrete street light pole based on thermoelectric effect according to claim 1, characterized in that: Each triangular side of the triangular column is embedded with a plurality of Fresnel lens units at equal intervals along the length direction, a plug is slidably arranged on the through hole, shape memory alloy springs and bias springs are arranged on both sides of the plug, the other end of the shape memory alloy spring is connected to the inner wall of the triangular column, the other end of the bias spring is connected to the inner wall of the heat collection cylinder, the optical axis of the Fresnel lens unit is deflected by 15°-30° towards the central axis of the triangular column, and the focused light spot is projected onto the surface of the shape memory alloy spring.

3. A self-generating concrete street light pole based on thermoelectric effect according to claim 1, characterized in that: The composite sandstone material comprises a white cement matrix, barium sulfate fillers, a hydrogel network and a hygroscopic salt component, the middle functional section has a tapered structure that is narrow at the top and wide at the bottom, and the middle functional end surface is provided with a spiral twill, the tangent direction of the spiral twill forms an angle of 30°-45° with the horizontal plane.

4. A self-generating concrete street light pole based on thermoelectric effect according to claim 1 or 3, characterized in that: The cold end of the thermoelectric conversion module is bonded with a heat sink, a hollow heat conducting channel is formed in the middle of the middle functional end, and the heat dissipation fins of the heat sink are arranged in the heat conducting channel.

5. A self-powering concrete street light pole based on thermoelectric effect according to claim 4, characterized in that: The cross section of the heat conducting channel has a honeycomb structure to increase the heat exchange area; the fin array of the heat sink is embedded in the honeycomb heat conducting channel to form an interference fit passive heat dissipation system.

6. A self-generating concrete street light pole based on thermoelectric effect according to claim 1, characterized in that: The inner wall of the heat collection cylinder is provided with a plurality of heat conducting grooves, and the heat conducting grooves are filled with phase change materials.

7. A self-generating concrete street light pole based on thermoelectric effect according to claim 1, wherein: The upper heat collection section is provided with a cleaning component, the cleaning component includes two groups of wind wheels, the two groups of wind wheels are rotatably arranged on the upper and lower sides of the upper heat collection section, each wind wheel is provided with a support frame, a sliding rod is arranged on the support frame, a sliding seat is slidably arranged on the sliding rod, a return spring is sleeved on the sliding rod and connected between the inner wall of the support frame and the sliding seat, a cleaning roller is connected between the sliding seats on the upper and lower sides, and the cleaning roller abuts against the surface of the triangular column.

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