A photovoltaic heating phase change thermal storage device based on power engineering design

Abstract

This invention discloses a photovoltaic heating phase change thermal storage device based on power engineering design, belonging to the technical field of thermal storage devices. Two moving blocks are symmetrically embedded inside a ring track. A stirring gear is rotatably mounted on the top of each moving block, and a stirring rod is connected to the bottom of the moving blocks. Two support pipes are installed on the bottom inner side of the thermal storage tank. Two moving frames are slidably mounted on the top of the support pipes in the middle of the movable cavity. A filter screen is fixed inside each moving frame. This invention uses a ring rack to drive the stirring gear to rotate, thereby rotating the stirring rod and reducing the temperature gradient during the solid-liquid phase change process. As the stirring rod moves with the moving blocks, its effective range increases, making the internal temperature distribution of the solid-liquid paraffin more uniform. Furthermore, the filter screen pushes the solid in the solid-liquid coexisting paraffin solution closer to the foamed copper plate and the thermal storage tank, bringing the unmelted solid paraffin closer to the heat source, further improving thermal storage efficiency.

Description

Technical Field

[0001] This invention relates to the field of thermal energy storage technology, specifically to a photovoltaic heating phase change thermal energy storage device based on power engineering design. Background Technology

[0002] Thermal storage devices typically refer to a device or system that can store and release thermal energy when needed. When energy supply is unstable or demand fluctuates greatly, thermal storage devices can help balance the difference between energy supply and demand. By matching thermal energy demand and supply at different times, thermal storage devices can improve energy utilization efficiency and reduce energy waste.

[0003] In the Chinese patent application number CN202410998766.7, entitled "A Photovoltaic Heating Phase Change Thermal Storage Device", the patent converts solar energy into electrical energy through a solar photovoltaic power generation panel, which is then transmitted to a solar controller via a photovoltaic DC cable assembly. Under the action of the solar controller, a stable output of photovoltaic DC power generation is achieved. Under the action of a DC distribution box, the photovoltaic DC power is transmitted to the phase change thermal storage device to realize the storage and use of solar energy.

[0004] Existing thermal storage devices often use paraffin wax as the thermal storage material. In existing technologies, when heating paraffin wax with a heating rod, the small heat conduction area of ​​the heating rod results in a slow melting rate of the paraffin wax during heat storage, leading to a decrease in thermal storage efficiency. To increase thermal storage efficiency, existing technologies often employ stirring. However, in existing technologies, the stirring rod is positioned in a fixed position, resulting in uneven stirring and poor stirring effect when the thermal storage device is large. Furthermore, when paraffin wax is in a solid-liquid coexistence state, its poor thermal conductivity makes it difficult for suspended solid paraffin wax, which is far from the heating rod, to quickly absorb heat and melt, further reducing thermal storage efficiency. Summary of the Invention

[0005] This invention provides a photovoltaic heating phase change thermal storage device based on power engineering design, which can effectively solve the problems in the prior art mentioned above, where the heat absorption and melting speed of paraffin wax is slow and the thermal storage efficiency is low when heating paraffin wax with a heating rod. The existing stirring method has poor stirring effect, which is not conducive to improving the thermal storage efficiency. When paraffin wax is in a solid-liquid coexistence state, due to the poor thermal conductivity of paraffin wax, the suspended solid paraffin wax far from the heating rod is difficult to absorb heat and melt quickly, resulting in a decrease in thermal storage efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic heating phase change thermal storage device based on power engineering design, comprising a support base, wherein a high-efficiency thermal storage component is provided on the top of the support base, and the high-efficiency thermal storage component includes a thermal storage box;

[0007] A heat storage box is installed on the top of the support base. Multiple mounting brackets are installed at equal intervals on the bottom inner side of the heat storage box. A grooved frame is fixed on the top of the mounting bracket. Two foamed copper plates are fixed between the mounting bracket and the grooved frame. A heat exchange tube is fixed between two adjacent foamed copper plates.

[0008] The heat storage box has four movable chambers inside. A support suspension is installed on the top of each movable chamber. An inner support plate is fixed inside the support suspension through a connecting frame. A ring rail is provided between the support suspension and the inner support plate. Two moving blocks are symmetrically embedded inside the ring rail. A stirring gear is rotatably installed on the top of each moving block. A stirring rod is connected to the bottom of each moving block. Multiple crushing blocks and stirring blades are evenly connected to the outside of the stirring rod.

[0009] Two support tubes are installed at the bottom inside the heat storage box, and two movable frames are slidably installed in the middle of the movable cavity at the top of the support tubes. A filter screen is fixed inside the movable frame.

[0010] According to the above technical solution, the slotted frame is connected and fixed to the mounting frame by a fixing plate. The fixing plate is located outside the foamed copper plate, and the heat exchange tube is located between two adjacent movable cavities. Multiple main heating rods are installed at equal intervals in the gap between the two adjacent foamed copper plates and the heat exchange tube.

[0011] According to the above technical solution, a ring rack is installed on the top of the support suspension, drive gears are rotatably installed at both ends of the top of the inner support plate, a drive chain is connected between two adjacent drive gears, the stirring gear meshes with the ring rack, and a connecting ear is connected to one side of the top of the moving block, and the connecting ear is connected to the drive chain.

[0012] According to the above technical solution, the top end of the stirring rod is connected to the bottom end of the rotating shaft of the adjacent stirring gear, a sealing top plate is installed on the top of the heat storage tank, and multiple drive motors are installed on the top of the sealing top plate. The output end of the drive motor passes through the sealing top plate and is connected to the adjacent drive gear.

[0013] According to the above technical solution, the support tube passes through the mounting frame, an auxiliary heating rod is installed inside the support tube, a threaded cylinder is installed at the bottom of one side of the movable frame, and four bidirectional screws are connected to one side of the bottom of the inner side of the heat storage box, with two adjacent threaded cylinders located at the outer ends of the bidirectional screws respectively.

[0014] One end of the bidirectional screw is welded with a male lug, and the other end of the bidirectional screw is welded with a female lug. The four bidirectional screws are connected and fixed end to end by the male lugs and female lugs. The male lugs are embedded inside the female lugs and are fixed by fixing bolts.

[0015] According to the above technical solution, an electric heating plate is fixedly attached to the outer perimeter of the heat storage box, and insulation cotton is attached to the outer side of the electric heating plate. A moving motor is installed on one side of the outside of the heat storage box, and the output end of the moving motor passes through the insulation cotton and is connected to one end of a bidirectional screw.

[0016] According to the above technical solution, an auxiliary heat protection component is provided on the outside of the heat storage box, and the auxiliary heat protection component includes a support frame;

[0017] The heat storage box is provided with a support frame on one side, a rotating seat is rotatably installed on the top of the support frame, an adjustment frame is connected to the top of the rotating seat, an angle adjustment shaft is rotatably installed on the top of the adjustment frame, a groove-shaped reflector is fixed on one side of the angle adjustment shaft, a tripod is connected to both ends of the groove-shaped reflector, a distribution box is fixed to the top of the tripod, multiple distribution pipes are connected in the middle of the distribution box, a heat absorption sleeve is sleeved on the outside of the distribution pipe, and multiple heat-conducting fins are provided inside the heat absorption sleeve;

[0018] A water storage tank is provided on one side of the support frame, and a water pump is installed on the top of the water storage tank. The water inlet of the water pump is located at the bottom inside the water storage tank, and the water outlet of the water pump is connected to a distribution box through a cold water hose. A main water pipe is connected to the bottom of one side of the heat storage box, and one end of the bottom of the heat exchange tube is connected to one side of the main water pipe. One end of the main water pipe is connected to another distribution box through an electrically controlled water valve and a heat transfer hose.

[0019] The top of the sealed top plate is connected to a drain main pipe on one side. The top end of the heat exchange tube is connected to the bottom of the drain main pipe. One end of the drain main pipe is connected to one end of the return pipe through an electrically controlled water valve. The other end of the return pipe is connected to the top of the water storage tank.

[0020] According to the above technical solution, an adjustment motor is installed on the top inner side of the support frame. The output end of the adjustment motor is connected to the bottom of the rotating seat. An electric push cylinder is installed on one end of the adjustment frame. A linkage wheel is connected to the output end of the electric push cylinder. One end of the angle adjustment shaft is connected to one end of the linkage rod. A movable opening is provided on the inner side of the linkage rod. The linkage wheel is embedded in the movable opening.

[0021] According to the above technical solution, the other end of the main water supply pipe is connected to a water supply pipe via an electrically controlled water valve, and the other end of the main drainage pipe is connected to a heating pipe via an electrically controlled water valve.

[0022] According to the above technical solution, the input terminals of the main heating rod, drive motor, auxiliary heating rod, moving motor, electric heating plate, regulating motor, electric push cylinder and water pump are electrically connected to the output terminal of the controller, and the input terminal of the controller is electrically connected to the output terminal of the external power supply.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. Equipped with a high-efficiency heat storage component, the main heating rod is attached to the foamed copper plate. The heat generated by the main heating rod can be conducted to the foamed copper plate, realizing rapid heating of the foamed copper plate. The foamed copper plate has a large heat conduction area, and the surrounding paraffin wax can melt quickly. When the paraffin wax is in a solid-liquid coexistence state, the drive motor drives the drive chain to move. Under the connection of the connecting ear, the drive chain drives the moving block to move along the ring track. Through the ring rack, the stirring gear is driven to rotate, realizing the rotation of the stirring rod, the crushing block and the stirring fan blade. This makes the contact area between the solid paraffin wax and the heat-absorbing and melting liquid paraffin wax larger, increases the heat conduction area, accelerates the melting speed of the solid paraffin wax, and improves the heat storage efficiency. At the same time, stirring can reduce the temperature gradient in the solid-liquid phase change process and significantly improve the heat transfer efficiency.

[0025] As the stirring rod moves with the moving block, the range of action of the stirring rod increases, making the stirring more uniform and the internal temperature distribution of the solid-liquid paraffin more uniform, further improving the heat storage efficiency. When the stirring fan blades rotate, they drive the liquid paraffin to flow. Under the action of liquid flow, the high thermal conductivity material deposited at the bottom of the liquid paraffin is more evenly distributed inside the liquid paraffin, further improving the heat storage efficiency.

[0026] When half of the solid paraffin melts, the moving motor drives the bidirectional screw to rotate. Under the support and limiting guidance of the support tube, the bidirectional screw drives the two connected moving frames to move away from each other. The filter screen pushes the solid in the solid-liquid coexisting paraffin solution closer to the foam copper plate and the heat storage box. Under the pushing and filtering action of the filter screen, the unmelted solid paraffin is brought closer to the heat source, which increases the melting speed of the paraffin and further improves the heat storage efficiency.

[0027] An auxiliary heating rod is installed inside the support tube. The support tube, moving frame, and filter screen are made of stainless steel. Under the action of heat conduction, the heat generated by the auxiliary heating rod can be conducted to the moving frame and filter screen through the support tube. The solid paraffin around the heated moving frame and filter screen can absorb heat and melt more quickly, increasing the heating area and further improving the heat storage efficiency.

[0028] 2. Equipped with auxiliary heating components, the heat-absorbing sleeve, heat-conducting fins, and distribution pipes are all made of copper-aluminum alloy. The surface of the heat-absorbing sleeve is coated with high-temperature resistant black paint. Sunlight shining on the heat-absorbing sleeve can rapidly heat it up. Under the action of heat conduction, the water flowing inside the distribution pipe is heated. The heated water enters the heat exchange tube through the heat transfer hose. The hot water heats the heat exchange tube. The foamed copper plate is attached to the heat exchange tube, and the heat on the heat exchange tube can be smoothly transferred to the foamed copper plate to heat the paraffin wax. In conjunction with the main heating rod, auxiliary heating rod, and electric heating plate to heat the paraffin wax, the heat storage time is shortened, the heat storage efficiency is improved, and the power generation loss of the photovoltaic panel is reduced, making it more energy-saving and environmentally friendly.

[0029] The heated water flows back into the storage tank through the return pipe to ensure the long-term stable operation of the auxiliary heat storage. During the heat storage process, when the temperature of the paraffin wax is higher than the set heat storage temperature, the water supply flow rate is increased to cool down the paraffin wax, preventing the temperature of the heat storage paraffin wax from being too high for a long time and improving the service life of the heat storage paraffin wax.

[0030] Under the connection of the linkage wheel and linkage rod, the electric push cylinder drives the angle adjustment shaft to rotate, realizing the swing of the grooved reflector. In conjunction with the adjustment motor, the rotating seat and adjustment frame are rotated, and the grooved reflector can change its orientation with the movement of the sun, so that the sunlight shining on the grooved reflector is always reflected and focused onto the heat absorption jacket, making the hot water inside the heat exchange tube more stable and ensuring heat storage efficiency.

[0031] In summary, during the day when there is sunlight, the water is heated by the light. After the hot water enters the heat exchange tube, it heats the surrounding low-temperature paraffin wax through the thermal conductivity of the foamed copper plate, allowing the paraffin wax to store heat. At night when heating is needed, cold water enters the heat exchange tube, and the paraffin wax inside the heat storage tank releases heat to heat the cold water flowing through the heat exchange tube. The heat exchange tubes in the high-efficiency heat storage component and the auxiliary heat protection component are integrated and multifunctional. The two components work together to fully improve the heat storage efficiency. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0033] In the attached diagram:

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the high-efficiency thermal storage component of the present invention;

[0036] Figure 3 This is a schematic diagram of the installation structure of the suspension support of the present invention;

[0037] Figure 4 This is a schematic diagram of the installation structure of the stirring rod of the present invention;

[0038] Figure 5 This is a schematic diagram of the installation structure of the foamed copper plate of the present invention;

[0039] Figure 6 This is a schematic diagram of the installation structure of the annular rack of the present invention;

[0040] Figure 7 This is a schematic diagram of the installation structure of the drive chain of the present invention;

[0041] Figure 8This is a schematic diagram of the installation structure of the filter screen of the present invention;

[0042] Figure 9 This invention comes from Figure 8 Enlarged view of region A;

[0043] Figure 10 This is a schematic diagram of the auxiliary heating protection component of the present invention;

[0044] Figure 11 This is a schematic diagram of the mounting structure of the groove-shaped reflector of the present invention;

[0045] Figure 12 This is a schematic diagram of the installation structure of the linkage rod of the present invention;

[0046] Figure 13 This is a schematic diagram of the installation structure of the heat-absorbing sleeve of the present invention;

[0047] Numbered in the diagram: 1. Support base;

[0048] 2. High-efficiency thermal storage components; 201. Thermal storage box; 202. Mounting frame; 203. Fixing plate; 204. Channel frame; 205. Heat exchange tube; 206. Copper foam plate; 207. Main heating rod; 208. Support suspension; 209. Connecting frame; 210. Inner support plate; 211. Annular rail; 212. Annular rack; 213. Drive gear; 214. Drive chain; 215. Moving block; 216. Stirring gear; 217. 218. Connecting ear; 219. Stirring rod; 220. Crushing block; 221. Agitator blade; 222. Drive motor; 223. Sealing top plate; 224. Support tube; 225. Secondary heating rod; 226. Moving frame; 227. Filter screen; 228. Threaded cylinder; 229. Double-acting screw; 230. Connecting male ear; 231. Connecting female ear; 232. Moving motor; 233. Heating plate; 234. Insulation cotton; 235. Movable cavity;

[0049] 3. Auxiliary heating components; 301. Support frame; 302. Rotating seat; 303. Adjusting frame; 304. Adjusting motor; 305. Angle adjusting shaft; 306. Groove reflector; 307. Tripod; 308. Diverter box; 309. Diverter pipe; 310. Heat absorption sleeve; 311. Heat conducting plate; 312. Electric push cylinder; 313. Linkage wheel; 314. Linkage rod; 315. Movable port; 316. Water storage tank; 317. Water pump; 318. Cold water hose; 319. Heat water hose; 320. Main water supply pipe; 321. Water supply pipe; 322. Main drain pipe; 323. Return pipe; 324. Heating pipe. Detailed Implementation

[0050] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0051] Example: Figure 1-13 As shown, this invention provides a photovoltaic heating phase change thermal storage device technical solution based on power engineering design, including a support base 1, with a high-efficiency thermal storage component 2 installed on the top of the support base 1. The high-efficiency thermal storage component 2 includes a thermal storage box 201, a mounting frame 202, a fixing plate 203, a trough-shaped frame 204, a heat exchange tube 205, a foamed copper plate 206, a main heating rod 207, a support suspension 208, a connecting frame 209, an inner support plate 210, a ring rail 211, a ring rack 212, and a drive gear. 213. Drive chain; 214. Moving block; 215. Stirring gear; 216. Connecting ear; 217. Stirring rod; 218. Crushing block; 219. Stirring fan blade; 220. Drive motor; 221. Sealing top plate; 222. Support tube; 223. Secondary heating rod; 224. Moving frame; 225. Filter screen; 226. Threaded cylinder; 227. Bidirectional screw; 228. Male docking ear; 229. Female docking ear; 230. Moving motor; 231. Heating plate; 232. Insulation cotton; 233. Movable cavity; 234.

[0052] A heat storage box 201 is mounted on the top of the support base 1. Multiple mounting brackets 202 are evenly spaced along the bottom inner side of the heat storage box 201. A channel-shaped frame 204 is fixed to the top of each mounting bracket 202. Two foamed copper plates 206 are fixed between the mounting brackets 202 and the channel-shaped frame 204. A heat exchange tube 205 is fixed between two adjacent foamed copper plates 206. The channel-shaped frame 204 is connected and fixed to the mounting brackets 202 via a fixing plate 203. The fixing plate 203 is located outside the foamed copper plates 206 and serves to fix the foamed copper plates 206 to both sides of the heat exchange tube 205, ensuring that the foamed copper plates 206 are in close contact with the heat exchange tube 205. The heat on the foamed copper plate 206 can be smoothly transferred to the heat exchange tube 205. The heat exchange tube 205 is located between two adjacent movable chambers 234. Multiple main heating rods 207 are installed at equal intervals in the gap between two adjacent foamed copper plates 206 and the heat exchange tube 205. The main heating rods 207 are in close contact with the foamed copper plate 206. The heat generated by the main heating rods 207 can be transferred to the foamed copper plate 206. The structure of the foamed copper plate 206 has a large heat conduction area, which gives the foamed copper plate 206 good heat conduction performance. When the main heating rods 207 are running, the heat storage solid paraffin around the foamed copper plate 206 can melt faster.

[0053] The heat storage box 201 has four movable chambers 234 inside. A support suspension 208 is installed on the top of the movable chamber 234. An inner support plate 210 is fixed inside the support suspension 208 through a connecting frame 209. An annular rail 211 is provided between the support suspension 208 and the inner support plate 210. Two movable blocks 215 are symmetrically embedded inside the annular rail 211. A stirring gear 216 is rotatably installed on the top of the movable block 215. A stirring rod 218 is connected to the bottom of the movable block 215. Multiple crushing blocks 219 and stirring blades 220 are evenly connected to the outside of the stirring rod 218.

[0054] A ring rack 212 is mounted on the top of the support suspension 208. Drive gears 213 are rotatably mounted at both ends of the top of the inner support plate 210. A drive chain 214 connects two adjacent drive gears 213. A connecting ear 217 is connected to one side of the top of the moving block 215, and the connecting ear 217 is connected to the drive chain 214. A sealing top plate 222 is mounted on the top of the heat storage box 201. Multiple drive motors 221 are mounted on the top of the sealing top plate 222. The output end of each drive motor 221 passes through the sealing top plate 222 and connects to an adjacent drive gear 213. The drive motor 221 can drive... The drive gear 213, which is connected to the moving phase, rotates. When the drive gear 213 rotates, it can drive the drive chain 214 to move. Under the connection of the connecting ear 217, the drive chain 214 can drive the moving block 215 to move along the annular track 211. The stirring gear 216 meshes with the annular rack 212. The top end of the stirring rod 218 is connected to the bottom end of the rotating shaft of the adjacent stirring gear 216. When the moving block 215 moves along the annular track 211, the annular rack 212 drives the stirring gear 216 to rotate, which in turn drives the stirring rod 218, the crushing block 219 and the stirring fan blade 220 to rotate.

[0055] The heat storage box 201 is fixedly attached to the outer perimeter of an electric heating plate 232, and the outer side of the electric heating plate 232 is covered with insulation cotton 233. The heat storage box 201 is made of stainless steel. The electric heating plate 232 can heat the heat storage box 201, allowing the solid paraffin near the heat storage box 201 to absorb heat and melt more quickly. Two support tubes 223 are installed at the bottom of the inner side of the heat storage box 201. Two movable frames 225 are slidably installed in the middle of the movable cavity 234 at the top of the support tubes 223. A filter screen 226 is fixed inside the movable frame 225. The support tubes 223 pass through the mounting frame 202, and an auxiliary heating rod 224 is installed inside the support tubes 223. The support tubes 223, movable frames 225, and filter screen 226 are made of stainless steel and have good thermal conductivity. Under the action of heat conduction, the auxiliary heating rod 224... The heat generated by 24 can be conducted to the moving frame 225 and the filter screen 226 through the support pipe 223. The solid paraffin around the heated moving frame 225 and the filter screen 226 can absorb heat and melt more quickly. A threaded cylinder 227 is installed on one bottom side of the moving frame 225. Four bidirectional screws 228 are connected to one bottom side of the inner side of the heat storage box 201. Two adjacent threaded cylinders 227 are located at the two ends of the outer side of the bidirectional screws 228 respectively. A moving motor 231 is installed on one side of the outer side of the heat storage box 201. The output end of the moving motor 231 passes through the insulation cotton 233 and is connected to one end of a bidirectional screw 228. The moving motor 231 can drive the bidirectional screw 228 to rotate. The rotation of the bidirectional screw 228 can drive the two connected moving frames 225 to move closer or further away from each other.

[0056] One end of the bidirectional screw 228 is welded with a male lug 229, and the other end of the bidirectional screw 228 is welded with a female lug 230. The four bidirectional screws 228 are connected and fixed end to end through the male lug 229 and the female lug 230. The male lug 229 is embedded in the female lug 230 and is fixed by a fixing bolt. The four bidirectional screws 228 are connected and fixed by the male lug 229, the female lug 230 and the fixing bolt, which facilitates the disassembly and installation of the four bidirectional screws 228.

[0057] An auxiliary heat protection component 3 is provided on the outside of the heat storage box 201. The auxiliary heat protection component 3 includes a support frame 301, a rotating seat 302, an adjusting frame 303, an adjusting motor 304, an adjusting shaft 305, a grooved reflector 306, a tripod 307, a distribution box 308, a distribution pipe 309, a heat absorption sleeve 310, a heat conduction plate 311, an electric push cylinder 312, a linkage wheel 313, a linkage rod 314, a movable port 315, a water storage tank 316, a water pump 317, a cold water hose 318, a heat water hose 319, a main water supply pipe 320, a water supply pipe 321, a main drainage pipe 322, a return pipe 323, and a heating pipe 324.

[0058] A support frame 301 is provided on one side of the heat storage box 201. A rotating seat 302 is rotatably mounted on the top of the support frame 301. An adjusting frame 303 is connected to the top of the rotating seat 302. An adjusting shaft 305 is rotatably mounted on the top of the adjusting frame 303. A grooved reflector 306 is fixed on one side of the adjusting shaft 305. Tripods 307 are connected to both ends of the grooved reflector 306. A distribution box 308 is fixed to the top of the tripod 307. Multiple distribution pipes 309 are connected in the middle of the distribution box 308. A heat-absorbing sleeve 310 is sleeved on the outside of the diversion pipe 309. Multiple heat-conducting fins 311 are installed inside the heat-absorbing sleeve 310. The heat-absorbing sleeve 310, the heat-conducting fins 311 and the diversion pipe 309 are all made of copper-aluminum alloy, which has good thermal conductivity. The surface of the heat-absorbing sleeve 310 is coated with high-temperature resistant black paint. Sunlight shining on the heat-absorbing sleeve 310 can make the heat-absorbing sleeve 310 heat up quickly. Under the action of heat conduction, it can heat the water flowing inside the diversion pipe 309.

[0059] An adjusting motor 304 is installed on the top inner side of the support frame 301. The output end of the adjusting motor 304 is connected to the bottom of the rotating seat 302. An electric push cylinder 312 is installed on one end of the adjusting frame 303. The output end of the electric push cylinder 312 is connected to a linkage wheel 313. One end of the adjusting shaft 305 is connected to one end of the linkage rod 314. A movable opening 315 is opened on the inner side of the linkage rod 314. The linkage wheel 313 is embedded in the movable opening 315, and the movable opening 315 provides space for the movement of the linkage wheel 313. In the meantime, under the connection of the linkage wheel 313 and the linkage rod 314, the electric push cylinder 312 can drive the angle adjustment shaft 305 to rotate, which in turn drives the grooved reflector 306 to swing. The adjustment motor 304 can drive the rotating seat 302 and the adjustment frame 303 to rotate. The adjustment motor 304 and the electric push cylinder 312 cooperate, and the grooved reflector 306 can change its orientation with the movement of the sun, so that the sunlight shining on the grooved reflector 306 can be reflected and concentrated onto the heat-absorbing sleeve 310.

[0060] A water storage tank 316 is provided on one side of the support frame 301. A water pump 317 is installed on the top of the water storage tank 316. The water inlet of the water pump 317 is located at the bottom inside the water storage tank 316. The water outlet of the water pump 317 is connected to a distribution box 308 through a cold water hose 318. A water main pipe 320 is connected to the bottom of one side of the heat storage box 201. One end of the bottom of the heat exchange tube 205 is connected to one side of the water main pipe 320. One end of the water main pipe 320 is connected to another distribution box 308 through an electrically controlled water valve and a heat transfer hose 319.

[0061] The top of the sealed top plate 222 is connected to a drain main pipe 322. The top end of the heat exchange tube 205 is connected to the bottom of the drain main pipe 322. One end of the drain main pipe 322 is connected to one end of the return pipe 323 through an electric water valve. The other end of the return pipe 323 is connected to the top of the water storage tank 316.

[0062] The other end of the main water supply pipe 320 is connected to the water supply pipe 321 via an electrically controlled water valve, and the other end of the main drainage pipe 322 is connected to the heating pipe 324 via an electrically controlled water valve. When water heating is needed at night, the electrically controlled water valve connected to the water supply pipe 321 is opened, and the external water pump delivers cold water into the main water supply pipe 320. After the cold water enters the heat exchange pipe 205, the paraffin inside the heat storage box 201 releases heat to heat the water flowing through the heat exchange pipe 205. The heated hot water flows into the main drainage pipe 322, and the electrically controlled water valve connected to the heating pipe 324 is opened. Finally, the hot water enters the heating pipe 324 and flows to the heating point.

[0063] The input terminals of the main heating rod 207, drive motor 221, auxiliary heating rod 224, moving motor 231, electric heating plate 232, regulating motor 304, electric push cylinder 312 and water pump 317 are electrically connected to the output terminal of the controller. The input terminal of the controller is electrically connected to the output terminal of the external power supply. The external power supply is the electrical energy generated by the photovoltaic panel, which is used to power the various electronic components.

[0064] The working principle and usage process of this invention: The heat storage box 201 stores heat-storing paraffin wax. When there is sunlight, part of the electrical energy generated by the photovoltaic panel is used to power the various electrical components of the device. The paraffin wax is in a solid state at room temperature. During heat storage, the main heating rod 207 and the electric heating plate 232 operate. The main heating rod 207 is in contact with the foamed copper plate 206. The heat generated by the main heating rod 207 can be conducted to the foamed copper plate 206, realizing the rapid heating of the foamed copper plate 206. The heat storage box 201 is made of stainless steel. The electric heating plate 232 can heat the heat storage box 201. With the heating of the main heating rod 207, the solid paraffin wax can absorb heat and melt faster. When the temperature of the paraffin wax material reaches its phase change temperature, a solid-liquid phase change occurs, the temperature remains constant, and a large amount of latent heat is absorbed.

[0065] When paraffin is in a solid-liquid coexistence state, the drive motor 221 drives the drive gear 213 to rotate. The rotation of the drive gear 213 drives the drive chain 214 to move. Under the connection of the connecting ear 217, the drive chain 214 drives the moving block 215 to move along the annular track 211. The stirring gear 216 meshes with the annular rack 212. When the moving block 215 moves along the annular track 211, the annular rack 212 drives the stirring gear 216 to rotate, which in turn drives the stirring rod 218, the crushing block 219 and the agitating fan blade 220 to rotate. The crushing block 219 and the agitating fan blade 220... The rotation breaks down the surrounding solid paraffin, breaking large solid paraffins into smaller ones, increasing the contact area between the solid paraffins and the heat-absorbing and melting liquid paraffins. This increases the heat conduction area, accelerates the melting rate of the solid paraffins, and improves the heat storage efficiency. At the same time, stirring can reduce the temperature gradient during the solid-liquid phase change process, significantly improving the heat transfer efficiency. Furthermore, when the stirring rod 218 moves with the moving block 215, the range of action of the stirring rod 218 increases, making the stirring more uniform and the internal temperature distribution of the solid-liquid paraffins more uniform, further improving the heat storage efficiency.

[0066] In the prior art, high thermal conductivity materials are often added to paraffin to improve the heat transfer efficiency of paraffin. When the stirring fan blade 220 rotates, it drives the liquid paraffin to flow. Under the action of liquid flow, the high thermal conductivity material deposited at the bottom of the liquid paraffin is more evenly distributed inside the liquid paraffin, further improving the heat storage efficiency.

[0067] When half of the solid paraffin has melted, the drive motor 221 moves the stirring rod 218 to both ends of the annular rail 211, so that the stirring rod 218 does not affect the filter screen 226 from moving closer to the foam copper plate 206. Then, the moving motor 231 runs, and the moving motor 231 drives the bidirectional screw 228 to rotate. Under the support and limiting guidance of the support tube 223, the bidirectional screw 228 drives the two connected moving frames 225 to move away from each other. The filter screen 226 pushes the solid in the solid-liquid coexisting paraffin solution closer to the foam copper plate 206 and the heat storage box 201. Under the pushing and filtering action of the filter screen 226, the unmelted solid paraffin is brought closer to the heat source, which increases the melting speed of the paraffin and further improves the heat storage efficiency.

[0068] A secondary heating rod 224 is installed inside the support tube 223. The support tube 223, the moving frame 225 and the filter screen 226 are made of stainless steel, which has good thermal conductivity. Under the action of heat conduction, the heat generated by the secondary heating rod 224 can be conducted to the moving frame 225 and the filter screen 226 through the support tube 223. The solid paraffin around the heated moving frame 225 and the filter screen 226 can absorb heat and melt more quickly, which increases the heating area and further improves the heat storage efficiency.

[0069] The water storage tank 316 contains water. When the main heating rod 207, the auxiliary heating rod 224, and the electric heating plate 232 heat the paraffin, the grooved reflector 306 faces the sun. The electrically controlled water valve connected to the heat transfer hose 319 and the return pipe 323 is opened. Under the transmission connection of the cold transfer hose 318, the water pump 317 transports the water inside the water storage tank 316 to the distribution box 308 and the distribution pipe 309. The heat absorption sleeve 310, the heat conduction plate 311, and the distribution pipe 309 are all made of copper-aluminum alloy, which has good thermal conductivity. The surface of the heat absorption sleeve 310 is coated with high-temperature resistant black paint. The sunlight shining on the heat absorption sleeve 310 can make the heat absorption sleeve 310 heat up quickly. Under the action of heat conduction, it can heat the water flowing inside the distribution pipe 309. The distribution pipe 309 divides the water delivered to the distribution box 308 into smaller volumes for transportation, increasing the heat conduction area and improving the heating effect of the water.

[0070] Heated water enters the main water supply pipe 320 through the heat transfer hose 319, and then flows into the heat exchange tube 205. The hot water heats the heat exchange tube 205. The foamed copper plate 206 is in contact with the heat exchange tube 205, and the heat on the heat exchange tube 205 can be smoothly transferred to the foamed copper plate 206 to heat the paraffin wax. Combined with the heating of the paraffin wax by the main heating rod 207, the auxiliary heating rod 224, and the electric heating plate 232, this shortens the heat storage time, improves the heat storage efficiency, and also reduces the power generation loss of the photovoltaic panel, making it more energy-efficient and environmentally friendly. Then, the water inside the heat exchange tube 205... The water flows into the main drain pipe 322, and the electrically controlled water valve connected to the return pipe 323 is opened. The water flows back into the water storage tank 316 through the return pipe 323 to ensure the long-term stable operation of the auxiliary heat storage. A temperature sensor is installed inside the heat storage box 201 to monitor the temperature of the paraffin wax. During the heat storage process, when the temperature of the paraffin wax is higher than the set heat storage temperature, the water supply flow rate is increased to cool the heat exchange tube 205 and the foam copper plate 206. The paraffin wax is cooled by heat conduction, which prevents the temperature of the heat storage paraffin wax from being too high for a long time and improves the service life of the heat storage paraffin wax.

[0071] The output end of the regulating motor 304 is connected to the bottom of the rotating seat 302. The output end of the electric push cylinder 312 is connected to the linkage wheel 313. One end of the angle adjusting shaft 305 is connected to one end of the linkage rod 314. The linkage rod 314 has a movable opening 315 on its inner side. The linkage wheel 313 is embedded in the movable opening 315. The movable opening 315 provides space for the movement of the linkage wheel 313. Under the connection of the linkage wheel 313 and the linkage rod 314, the electric push cylinder 312 can drive the angle adjusting shaft 305 to rotate, which in turn drives the slotted reflector 306 to swing. The regulating motor 304 can drive the rotating seat 302 and the regulating frame 303 to rotate. The regulating motor 304 and the electric push cylinder 312 cooperate, and the slotted reflector 306 can change its orientation with the movement of the sun, so that the sunlight shining on the slotted reflector 306 is always reflected and focused onto the heat absorption sleeve 310, making the hot water inside the heat exchange tube 205 more stable and ensuring heat storage efficiency.

[0072] When hot water heating is needed at night, the electrically controlled water valve connected to the water supply pipe 321 is opened, and the electrically controlled water valve connected to the heat transfer hose 319 is closed. The external water pump delivers cold water into the main water supply pipe 320. After the cold water enters the heat exchange tube 205, the paraffin inside the heat storage tank 201 releases heat to heat the water flowing through the heat exchange tube 205. The heated hot water flows into the drain main pipe 322. The electrically controlled water valve connected to the heating pipe 324 is opened, and the electrically controlled water valve connected to the return pipe 323 is closed. Finally, the hot water enters the heating pipe 324 and flows to the heating point, achieving stable heating.

[0073] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A photovoltaic heating phase change thermal storage device based on power engineering design, comprising a support base (1), characterized in that, The support base (1) is provided with a high-efficiency heat storage component (2) on top, and the high-efficiency heat storage component (2) includes a heat storage box (201). A heat storage box (201) is installed on the top of the support base (1). Multiple mounting brackets (202) are installed at equal intervals on the bottom inner side of the heat storage box (201). A trough-shaped frame (204) is fixed on the top of the mounting bracket (202). Two foam copper plates (206) are fixed between the mounting bracket (202) and the trough-shaped frame (204). A heat exchange tube (205) is fixed between two adjacent foam copper plates (206). The heat storage box (201) has four movable chambers (234) inside. A support suspension (208) is installed on the top of the movable chamber (234). An inner support plate (210) is fixed inside the support suspension (208) through a connecting frame (209). A ring rail (211) is provided between the support suspension (208) and the inner support plate (210). Two moving blocks (215) are symmetrically embedded inside the ring rail (211). A stirring gear (216) is rotatably installed on the top of the moving block (215). A stirring rod (218) is connected to the bottom of the moving block (215). Multiple crushing blocks (219) and stirring blades (220) are evenly connected to the outside of the stirring rod (218). Two support tubes (223) are installed on the bottom inner side of the heat storage box (201). Two movable frames (225) are slidably installed in the middle of the movable cavity (234) at the top of the support tubes (223). A filter screen (226) is fixed inside the movable frame (225).

2. The photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 1, characterized in that, The slotted frame (204) is connected and fixed to the mounting frame (202) by a fixing plate (203). The fixing plate (203) is located outside the foamed copper plate (206). The heat exchange tube (205) is located between two adjacent movable cavities (234). Multiple main heating rods (207) are installed at equal intervals in the gap between the two adjacent foamed copper plates (206) and the heat exchange tube (205).

3. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 2, characterized in that, The top of the support suspension (208) is equipped with an annular rack (212), and the top two ends of the inner support plate (210) are rotatably equipped with drive gears (213). A drive chain (214) is connected between two adjacent drive gears (213). The stirring gear (216) meshes with the annular rack (212). A connecting ear (217) is connected to one side of the top of the moving block (215), and the connecting ear (217) is connected to the drive chain (214).

4. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 3, characterized in that, The top end of the stirring rod (218) is connected to the bottom end of the rotating shaft of the adjacent stirring gear (216). A sealing top plate (222) is installed on the top of the heat storage box (201). Multiple drive motors (221) are installed on the top of the sealing top plate (222). The output end of the drive motor (221) passes through the sealing top plate (222) and is connected to the adjacent drive gear (213).

5. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 4, characterized in that, The support tube (223) passes through the mounting frame (202), and an auxiliary heating rod (224) is installed inside the support tube (223). A threaded cylinder (227) is installed on one bottom side of the movable frame (225). Four bidirectional screws (228) are connected to one side of the bottom inner side of the heat storage box (201). Two adjacent threaded cylinders (227) are located at the two ends of the outer side of the bidirectional screws (228). One end of the bidirectional screw (228) is welded with a male lug (229), and the other end of the bidirectional screw (228) is welded with a female lug (230). The four bidirectional screws (228) are connected and fixed end to end by the male lug (229) and the female lug (230). The male lug (229) is embedded inside the female lug (230) and fixed by a fixing bolt.

6. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 5, characterized in that, The heat storage box (201) is fixedly attached to the outer perimeter of the heat plate (232), and the outer side of the heat plate (232) is attached to the heat insulation cotton (233). A mobile motor (231) is installed on one side of the heat storage box (201), and the output end of the mobile motor (231) passes through the heat insulation cotton (233) and is connected to one end of a bidirectional screw (228).

7. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 6, characterized in that, An auxiliary heat protection component (3) is provided on the outside of the heat storage box (201), and the auxiliary heat protection component (3) includes a support frame (301). The heat storage box (201) is provided with a support frame (301) on one side. A rotating seat (302) is rotatably installed on the top of the support frame (301). An adjusting frame (303) is connected to the top of the rotating seat (302). An adjusting shaft (305) is rotatably installed on the top of the adjusting frame (303). A grooved reflector (306) is fixed on one side of the adjusting shaft (305). Tripods (307) are connected to both ends of the grooved reflector (306). A distribution box (308) is fixed at the top of the tripod (307). Multiple distribution pipes (309) are connected in the middle of the distribution box (308). A heat-absorbing sleeve (310) is sleeved on the outside of the distribution pipe (309). Multiple heat-conducting fins (311) are provided inside the heat-absorbing sleeve (310). A water storage tank (316) is provided on one side of the support frame (301). A water pump (317) is installed on the top of the water storage tank (316). The water inlet of the water pump (317) is located at the bottom inside the water storage tank (316). The water outlet of the water pump (317) is connected to a distribution box (308) through a cold water hose (318). A water main pipe (320) is connected to the bottom of one side of the heat storage box (201). One end of the bottom of the heat exchange tube (205) is connected to one side of the water main pipe (320). One end of the water main pipe (320) is connected to another distribution box (308) through an electrically controlled water valve and a heat transfer hose (319). The top of the sealed top plate (222) is connected to a drain main pipe (322) on one side. The top end of the heat exchange pipe (205) is connected to the bottom of the drain main pipe (322). One end of the drain main pipe (322) is connected to one end of the return pipe (323) through an electrically controlled water valve. The other end of the return pipe (323) is connected to the top of the water storage tank (316).

8. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 7, characterized in that, An adjusting motor (304) is installed on the top inner side of the support frame (301). The output end of the adjusting motor (304) is connected to the bottom of the rotating seat (302). An electric push cylinder (312) is installed on one end of the adjusting frame (303). A linkage wheel (313) is connected to the output end of the electric push cylinder (312). One end of the angle adjusting shaft (305) is connected to one end of the linkage rod (314). A movable opening (315) is opened on the inner side of the linkage rod (314). The linkage wheel (313) is embedded in the movable opening (315).

9. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 7, characterized in that, The other end of the main water supply pipe (320) is connected to a water supply pipe (321) via an electrically controlled water valve, and the other end of the main drainage pipe (322) is connected to a heating pipe (324) via an electrically controlled water valve.

10. A photovoltaic heating phase change thermal energy storage device based on power engineering design according to claim 8, characterized in that, The input terminals of the main heating rod (207), drive motor (221), auxiliary heating rod (224), moving motor (231), electric heating plate (232), regulating motor (304), electric push cylinder (312) and water pump (317) are electrically connected to the output terminal of the controller, and the input terminal of the controller is electrically connected to the output terminal of the external power supply.

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