Two-phase loop thermosyphon variable conductive pipe cross-seasonal heat storage airport pavement deicing system

Abstract

The application discloses a two-phase loop thermosyphon variable heat conduction pipe cross-season heat storage airport pavement snow melting system, which comprises a pavement heat exchange section, an insulation section, an underground heat storage section and a liquid storage room. When it snows in winter, the pavement heat exchange section realizes snow melting by radiating heat to the pavement through the top pipe heat exchange rib; when the pavement temperature is relatively high in summer, the heat is used to heat the working medium in the top pipe of the heat pipe through the top pipe heat exchange rib, the working medium flows into the heat pipe bottom heat storage pipe by using the pressure difference between the outer pipe and the inner working medium, and the soil is heated through the bottom pipe heat exchange rib, so that the heat in summer is stored in the underground soil, the temperature rise of the airport pavement is ensured to be not high, the heat in summer is stored in the underground soil by using the system, the summer heat storage of the soil is released in winter to realize snow melting, cross-season heat storage and snow melting are realized, the heater of the heat storage room can heat the working medium according to the temperature signal of the bottom pipe temperature sensor, and then the heat pipe is controlled, and the pavement snow melting in the extremely cold winter is ensured.

Description

Technical Field

[0001] This device involves heat pipe heat exchange technology and a cross-seasonal heat storage road snow melting system. Specifically, it utilizes an innovative heat pipe technology that combines a two-phase loop thermosiphon heat pipe and a variable heat conduction pipe to achieve cross-seasonal heat storage by storing heat in summer and releasing heat in winter. The cross-seasonal heat is then used to melt snow on the road surface in winter and control the road surface temperature in summer. Background Technology

[0002] Currently, snow removal on airport pavements still relies heavily on chemical de-icing agents and mechanical removal methods. However, these two methods are insufficient to meet the demands for safe, environmentally friendly, and efficient operations. On the one hand, de-icing agents corrode pavement materials and ancillary facilities, and also damage the surrounding soil and water ecosystems. Mechanical snow removal requires closing the flight area, and the removal of black ice is often incomplete. Frequent operations are not only inefficient and costly, but also damage the pavement's anti-skid performance, posing safety hazards for aircraft takeoffs and landings. Early thermal snow removal technologies, such as gravity heat pipes, require drilling deep heat extraction wells, which are costly and have limited effectiveness. Conventional heat pipe pavement snow removal systems lack cross-seasonal heat storage, have insufficient underground heat sources, and suffer from low temperatures, making it difficult to ensure heat supply under extreme low temperatures. All of these factors necessitate the development of new snow removal systems.

[0003] Chinese invention patent application CN 118668551 discloses a composite heat pipe heat pump snow melting system. This invention utilizes geothermal preheating and a heat pump component for auxiliary heating, transferring heat from the soil to the ground to melt snow. The invention incorporates heat dissipation and heat extraction components for rapid heat exchange, while also providing vibration damping. An underground pipe heat extraction unit is pre-buried in the soil, with its outlet connected to the inlet of a heat pump unit. A first circulation pump is installed on this pipe. The outlet of the heat pump unit is connected to the inlet of a heat storage tank, which in turn connects to the inlet of a road surface snow melting unit. A second circulation pump is installed on this pipe, and the road surface snow melting unit is pre-buried beneath the road surface. However, this invention belongs to the field of geothermal application technology and does not involve cross-seasonal heat storage energy utilization.

[0004] Chinese patent application CN 120232210 discloses a road snow melting system based on geothermal shell-and-tube heat exchange. The invention includes: a geothermal shell-and-tube heat exchange system and a circulation pipeline; the circulation pipeline is filled with a heat exchange liquid; the geothermal shell-and-tube heat exchange system includes an outer buried pipe, an inner buried pipe, a well sealer, and a well cover; the well sealer is located at the bottom of a geothermal well; the outer buried pipe is positioned on top of the well sealer; the inner buried pipe is located inside the outer buried pipe, with a gap between the bottom end of the inner buried pipe and the top end of the well sealer; one end of the circulation pipeline is connected to a hot liquid pipeline equipped with a hot liquid circulation pump, the hot liquid pipeline passing through the well cover and communicating with the inner buried pipe; the other end of the circulation pipeline is connected to a cold liquid pipeline, the cold liquid pipeline passing through the well cover and extending into the space between the outer wall of the inner buried pipe and the inner wall of the outer buried pipe. This invention uses geothermal energy to exchange heat with the road through the heat exchange liquid, achieving energy-saving and environmentally friendly rapid snow melting. The system also only utilizes geothermal energy and does not include cross-seasonal heat storage or road surface cooling in summer.

[0005] In summary, the currently publicly available road snow melting systems can utilize geothermal energy or be combined with heat pumps for snow melting. However, there are no road snow melting systems that can store heat across seasons, especially variable heat pipe systems that can store heat across seasons for snow melting. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing methods that rely solely on geothermal energy for snow melting, such as the single heat source and the ease with which geothermal energy can fail, and to provide a solution for using cross-seasonal heat to achieve snow melting in winter and temperature control on roads in summer.

[0007] To address the aforementioned technical problems, this invention proposes an innovative heat pipe technology combining a two-phase loop thermosiphon heat pipe and a variable heat conduction pipe. This technology enables cross-seasonal heat storage by storing heat in summer and releasing heat in winter, thereby facilitating snow melting on roads in winter and temperature control on roads in summer. The invention employs the following technical solution: A two-phase loop thermosiphon variable heat pipe for cross-seasonal heat storage in airport pavement snow melting system, the system includes: a top heat pipe, a connecting pipe assembly, a bottom heat pipe, connecting pipes, and a liquid storage chamber filled with working fluid; one end of the top heat pipe is connected to the bottom heat pipe via the connecting pipe assembly to form the heat insulation section of the airport pavement system. A bottom tube temperature sensor is installed inside the bottom heat storage tube of the heat pipe; a heat storage circulation tube is horizontally connected to both sides of the bottom heat storage tube; a circulation pump is connected to the liquid storage chamber inside the heat storage circulation tube; a heat storage chamber heater with a controller is installed inside the liquid storage chamber; the controller is connected to the sensor through the bottom tube temperature signal line to form the heat exchange section of the airport pavement system. The other end of the heat pipe bottom storage pipe is connected to the heat pipe top pipe through a connecting pipe to form a heat exchange section of the airport pavement system; wherein: a top pipe temperature sensor and a temperature control valve are installed inside the heat pipe top pipe; the top pipe temperature sensor is connected to the temperature control valve through a top pipe temperature signal line; a heat insulation film is installed between the heat pipe top pipe and the connecting pipe assembly; the heat pipe top pipe is also connected to a top pipe heat exchange rib.

[0008] Furthermore, the working medium is an organic mixture composed of liquid paraffin, methanol, ethylene glycol, and glycerol.

[0009] Furthermore, the connecting pipe assembly consists of an outer connecting pipe and an inner connecting pipe, and the working fluids inside the outer connecting pipe and the inner connecting pipe have different temperature and pressure properties.

[0010] Furthermore, during the system's operation on the road surface in winter: when it snows or the temperature is below 0°C, heat is dissipated to the road surface through the heat exchange ribs of the jacking pipe to melt snow and prevent the road surface temperature from becoming too low; when the road surface temperature is high during the day in winter, the jacking pipe temperature sensor transmits the temperature signal to the controller of the temperature control valve through the jacking pipe temperature signal line to control the valve to close, ensuring that the stored heat does not dissipate heat during the day in winter; the heat insulation film causes the left and right sides of the heat pipe jacking pipe to have different temperatures, resulting in a density difference; and the working fluid dissipates heat to the road surface through the heat exchange ribs of the jacking pipe to melt snow. The working fluid's temperature decreases and it becomes solid, descending into the heat storage pipe at the bottom of the heat pipe through the connecting pipe. The underground soil heats the working fluid in the heat storage pipe at the bottom of the heat pipe through the heat exchange ribs of the bottom pipe. Due to the density difference caused by the temperature difference, the hot working fluid in the heat storage pipe at the bottom of the heat pipe rises to the jacking pipe through the outer and inner connecting pipes to dissipate heat to the road surface to melt snow.

[0011] Furthermore, during the summer road surface operation, the heat from the road surface is separated into working fluids within the heat pipe jacking tube through the heat exchange ribs. The low-melting-point working fluid absorbs heat and rises to the upper part of the heat pipe jacking tube, entering the outer connecting pipe. The high-melting-point working fluid absorbs heat and enters the lower part of the heating heat pipe jacking tube, entering the inner connecting pipe. The pressure inside the outer connecting pipe rises faster, resulting in higher overall pressure. Under pressure, the working fluid in the outer connecting pipe at the bottom heat storage tube enters the bottom heat storage tube, raising its temperature. The heat from the bottom heat storage tube is then transferred to the soil for heat storage through the heat exchange ribs. The mixed working fluid, after releasing heat, rises through the connecting pipe to the heat pipe jacking tube to continue absorbing heat, thus storing summer heat in the underground soil and achieving cross-seasonal heat storage.

[0012] 6. The system according to any one of claims 1-5 is characterized in that, in extremely cold winter, the heat storage chamber heater (12) is controlled by the controller (13) to heat the working fluid according to the temperature signal of the bottom tube temperature sensor (10), and the working fluid in the bottom heat storage tube (5) of all the heat pipes connected in series is heated by the heat storage circulation pump (17), thereby realizing the control of the heat pipe and ensuring the snow melting on the road surface in extremely cold winter.

[0013] To address the aforementioned technical problems, this invention proposes an innovative heat pipe technology combining a two-phase loop thermosiphon heat pipe and a variable heat conduction pipe. This technology enables cross-seasonal heat storage by storing heat in summer and releasing heat in winter, utilizing the cross-seasonal heat for snow melting on roads in winter and road surface temperature control in summer. It comprises four parts: a road surface heat exchange section, an insulation section, an underground heat storage section, and a liquid storage chamber. In winter, when it snows or the temperature drops below 0°C, heat is dissipated to the road surface through the heat exchange fins of the jacking pipe to melt snow and prevent the road surface temperature from becoming too low. During the daytime in winter, when the road surface temperature is high, the jacking pipe temperature sensor transmits the temperature signal to the controller of the temperature control valve via the jacking pipe temperature signal line, controlling the valve to close and ensuring that the stored heat is not dissipated during the daytime in winter. The insulation film creates a temperature difference between the left and right sides of the heat pipe jacking pipe, resulting in a density difference. The insulation section allows the working fluid to rise and fall, thereby enabling heat to be transferred from the bottom heat storage to the road surface for snow melting in winter, and enabling the road surface heat to be transferred to the bottom for heat storage in summer. In summer, the underground thermal storage section dissipates heat to the underground soil through the heat exchange fins of the bottom pipe for thermal storage; in winter, the soil heat is transferred to the working fluid inside the thermal storage pipe at the bottom of the heat pipe through the heat exchange fins. The liquid storage chamber serves both to replenish the working fluid and to provide heating in special circumstances of insufficient heat during extremely cold winters. The thermal storage circulation pump heats the working fluid inside the thermal storage pipes at the bottom of all heat pipes, thereby ensuring the heat required for snow melting on the road surface; the controller's start and stop are controlled by the temperature measurement value of the bottom pipe temperature sensor.

[0014] In winter, the working fluid in the system of this invention dissipates heat to the road surface through the heat exchange ribs on the left side of the top pipe of the heat pipe without insulation film, thus melting snow. At the same time, the working fluid cools down and becomes solid, descending to the bottom heat storage pipe of the heat pipe through the connecting pipe on the right side. The underground soil heats the working fluid in the bottom heat storage pipe through the heat exchange ribs on the bottom pipe. Due to the density difference caused by the temperature difference, the hot working fluid in the bottom heat storage pipe rises to the top pipe of the heat pipe through the outer and inner connecting pipes on the right side, thus dissipating heat to the road surface and melting snow. In summer, the road surface temperature is high. Heat is transferred through the heat exchange ribs of the jacking pipe to heat the working fluid inside the uninsulated tube on the left side of the jacking pipe. At this time, the road surface temperature decreases. Since the working fluid inside the tube is a mixture, it separates during heating. The working fluid with a lower melting point absorbs heat and rises to the upper part of the jacking pipe and enters the outer connecting pipe, while the working fluid with a higher melting point absorbs heat and enters the lower part of the jacking pipe and enters the inner connecting pipe. The working fluids in the outer and inner connecting pipes have different temperature and pressure properties, and the pressure in the outer connecting pipe rises faster, resulting in a higher overall pressure. The working fluid in the outer connecting pipe at the bottom heat storage pipe is pushed into the bottom heat storage pipe by the pressure, causing the working fluid temperature in the bottom heat storage pipe to rise. The heat in the bottom heat storage pipe is transferred to the soil for heat storage through the heat exchange ribs of the bottom pipe. After releasing heat, the mixed working fluid rises through the connecting pipe to the left side of the jacking pipe to continue absorbing heat. This process not only stores summer heat in the underground soil but also ensures that the temperature rise of the airport road surface is not too high. The system achieves snow melting in winter, reduces road surface temperature in summer, and minimizes the impact of thermal stress on the road surface. It also stores summer heat underground and releases the summer heat stored in the soil for snow melting in winter, thus realizing cross-seasonal heat storage and snow melting.

[0015] In extremely cold winters, the controller can control the heater in the heat storage chamber to heat the working fluid based on the temperature signal from the bottom pipe temperature sensor. The heat storage circulation pump can then heat the working fluid in the bottom heat storage pipe of all the heat pipes connected in series, thereby controlling the heat pipes and ensuring snow melting on the road surface in extremely cold winters.

[0016] Furthermore, in this invention, the working fluid is an organic mixture made of liquid paraffin, methanol, ethylene glycol, glycerol, etc., with a phase change temperature of approximately 16°C. During snow melting in winter, the working fluid condenses, and some of it becomes a solid flocculent that falls through the connecting pipe to the bottom heat storage pipe. The working fluid is heated in the bottom heat storage pipe and rises through the outer and inner connecting pipes to the top heat pipe, releasing heat and thus melting the snow. In summer, the entire system temperature is higher than the freezing point of organic matter, and no phase change occurs; only density and pressure changes due to temperature occur. The road surface temperature is high in summer, and heat is transferred through the heat exchange fins of the top pipe to the working fluid inside the uninsulated tube of the top heat pipe. At this time, the road surface heat is absorbed, and the temperature decreases. Because the working fluid inside the tube is a mixture, separation occurs during heating. The lower melting point working fluid absorbs heat and rises to the upper part of the top heat pipe, entering the outer connecting pipe, while the higher melting point working fluid enters the lower part of the top heat pipe and enters the inner connecting pipe. The working fluids have different temperature and pressure properties. The pressure inside the outer pipe rises faster and the overall pressure inside the pipe is higher. The working fluid inside the outer pipe of the connecting pipe at the bottom heat storage pipe enters the bottom heat storage pipe under the pressure, which raises the temperature of the working fluid inside the bottom heat storage pipe. The heat is transferred to the soil for heat storage through the heat exchange fins of the bottom pipe. After releasing heat, the mixed working fluid rises through the connecting pipe to the section of the top pipe without insulation film to continue absorbing heat. This achieves the goal of storing summer heat in the underground soil while ensuring that the temperature rise of the airport road surface is not too high.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) The system of the present invention is a two-phase loop thermosiphon variable heat pipe cross-seasonal heat storage airport road snow melting system. Compared with the existing technology that uses geothermal heat for snow melting, it realizes cross-seasonal heat storage snow melting as a whole. In summer, it reduces the road surface temperature and reduces the impact of thermal stress caused by temperature on the road surface. At the same time, it realizes the storage of summer heat underground and releases the summer heat stored in the soil in winter for snow melting, thus realizing cross-seasonal heat storage snow melting.

[0018] (2) Existing technologies use heat pipes or heat exchange pipes to exchange geothermal heat to melt snow on the road surface. In extremely cold weather, auxiliary ground heating or heat pump systems are added to ensure snow melting. The device of the present invention increases underground heat storage and heat exchange, greatly increasing the underground heat storage capacity, and significantly improving the reliability of the system through heat exchange control of variable heat conduction pipes. Attached Figure Description

[0019] Figure 1 This is a flowchart of the system composition of the present invention.

[0020] Figure label: 1. Insulation film; 2. Connecting pipe (outer); 3. Connecting pipe (inner); 4. Heat storage circulation pipe; 5. Heat pipe bottom storage section; 6. Heat pipe top section. Top tube heat exchange fin 7, connecting pipe 8, bottom tube heat exchange fin 9, bottom tube temperature sensor 10, heater 12 Controller 13 Pipe jacking temperature sensor 14 Pipe jacking temperature signal line 15 Temperature control valve 16 Circulation pump 17 Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0022] like Figure 1 As shown, the two-phase loop thermosiphon variable heat pipe cross-seasonal heat storage airport road surface snow melting system proposed in this invention is used to achieve cross-seasonal heat storage by storing heat in summer and releasing heat in winter, and to use cross-seasonal heat to melt snow on the road surface in winter and control the road surface temperature in summer. The system consists of four parts: road surface heat exchange section A, heat insulation section B, underground heat storage section C, and liquid storage chamber D. The specific connection process is as follows: the top pipe heat exchange rib 7 is fixed on the outside of the top pipe 6 of the heat pipe to enhance the heat exchange effect. The right side of the top pipe 6 is connected to the outer pipe 2 and the inner pipe 3. The outer pipe 2 is on the outer ring of the inner pipe 3. The upper part of the outer pipe 2 and the inner pipe 3 is wrapped with a heat insulation film 1. The function of the heat insulation film 1 is to reduce heat exchange and create a temperature difference between the top pipe 6 of the heat pipe and the outer pipe 2 and the inner pipe 3. The outer tube 2 and the inner tube 3 are connected to the bottom heat pipe 5 at the bottom of the system. The bottom heat pipe 5 has a bottom tube heat exchange rib 9 fixed on its outer side, which enhances the heat exchange effect. The bottom heat pipe 5 is connected to the connecting tube 8, and the connecting tube 8 is connected to the top heat pipe 6. Through the above cycle, the working fluid achieves heat exchange circulation within the heat pipe.

[0023] A temperature sensor 14 is installed at the bottom of the heat pipe jacking pipe 6 to measure the temperature. The temperature sensor signal is used to control the temperature control valve 16. In summer, when the temperature is high, the temperature control valve 16 remains open so that the circulating working fluid can continue to circulate in the loop to cool the road surface and store heat. In winter, when the temperature is low, if the temperature is below 4°C, the temperature control valve 16 remains open to keep the road surface heated and snow removed. If the temperature is above 4°C, the road surface does not need to melt snow, and the temperature control valve 16 remains closed. If the temperature at the top is higher than the temperature of the heat storage pipe 5 at the bottom of the heat pipe when measured on a sunny winter day, the temperature control valve 16 can also be opened to store heat.

[0024] During construction, multiple loops are laid in series and parallel. The bottom heat pipe storage tube 5 is horizontally connected to both sides by the heat storage circulation tube 4. The heat storage circulation tube 4 enables the series and parallel connection of multiple circulation heat pipe storage tubes 5. The heat storage circulation tube 4 is connected to the liquid storage chamber D via a circulation pump 17. A heat storage chamber heater 12 is installed inside the liquid storage chamber D. A bottom pipe temperature sensor 10 measures the bottom heat storage temperature. In extremely cold weather, when the temperature of the bottom heat pipe storage tube 5 is too low, the controller 13 controls the heat storage chamber heater 12 to heat the working fluid, thus replenishing the heat.

[0025] In this invention, the winter operating mode and process are as follows: If the temperature measured by the jacking pipe temperature sensor 14 is higher than 4°C, snow melting is not required on the road surface, and the temperature control valve 16 remains closed. If the temperature measured by the jacking pipe temperature sensor 14 is lower than 4°C, the temperature control valve 16 remains open to maintain heating and snow melting on the road surface. At this time, the organic working fluid inside the heat pipe jacking pipe 6 is condensed, and part of the working fluid becomes solid flocculent and falls through the connecting pipe 8 to the bottom heat storage pipe 5. The working fluid is heated in the bottom heat storage pipe 5, and after heating, it rises through the outer connecting pipe 2 and the inner connecting pipe 3 to the top heat pipe 6 to release heat. The working fluid circulates and releases heat to achieve snow melting. If the temperature of the working fluid at the top of the heat pipe jacking pipe 6 is measured to be higher than the temperature of the working fluid in the bottom heat storage pipe 5 during sunny winter weather, the temperature control valve 16 is opened to achieve heat storage. At this time, the cycle is equivalent to the summer heat storage cycle.

[0026] In this invention, the summer working mode and process are as follows: In summer, the temperature of the entire system is higher than the freezing point of organic matter, and the working fluid no longer undergoes a phase change; only density and pressure changes occur due to temperature. When the road surface temperature is high in summer, heat is transferred through the heat exchange ribs 7 to the organic working fluid inside the heat pipe jacking tube 6 without insulation. At this time, the road surface heat is transferred to the organic working fluid inside the heat pipe jacking tube 6 via the heat exchange ribs 7, causing the road surface temperature to decrease. The working fluid inside the tube separates during heating. The low-melting-point mixed working fluid absorbs heat and rises to the upper part of the heat pipe jacking tube, entering the connecting outer tube 2. The high-melting-point mixed working fluid enters the connecting inner tube 3 at the lower part of the heat pipe jacking tube. The connecting outer tube 2 and the connecting inner tube 3... Due to the different temperature and pressure properties of the working fluid, the pressure of the working fluid in the outer pipe 2 rises faster, resulting in a higher overall pressure within the pipe. Driven by this pressure, the working fluid in the outer pipe 2 enters the bottom heat storage pipe 5. The temperature of the working fluid in the bottom heat storage pipe 5 increases, and the heat is transferred to the soil for heat storage through the bottom pipe heat exchange fins 9. After releasing heat, the mixed working fluid rises through the connecting pipe 8 to the uninsulated section of the top pipe 6 to continue absorbing heat. This process stores summer heat in the underground soil, achieving cross-seasonal heat storage. Simultaneously, heat from the road surface is carried away, preventing excessive temperature rise on the airport road surface and reducing stress caused by temperature differences.

[0027] In summary, this invention enables cross-seasonal heat storage and snow melting. In summer, the heat gained from the road surface is stored underground via a circulating working fluid, simultaneously reducing the road surface temperature and minimizing the impact of thermal stress on the road surface. In winter, the stored heat in the soil is released and used for snow melting via the circulating working fluid, achieving cross-seasonal heat storage and snow melting. This system utilizes underground heat storage, which has a large capacity, ensuring sufficient heat for snow melting in winter. Even in extremely cold winters, the system's reliability can be significantly improved through heat exchange control via variable heat pipes.

[0028] Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many modifications under the guidance of the present invention without departing from the spirit of the present invention, and these modifications are all within the protection scope of the present invention.

Claims

1. An airport pavement snow melting system with a two-phase loop thermosiphon variable heat pipe for cross-seasonal heat storage, characterized in that, The system includes: a heat pipe top pipe (6), a connecting pipe group, a heat pipe bottom heat storage pipe (5), a connecting pipe (8), and a liquid storage chamber (D) containing working fluid; one end of the heat pipe top pipe (6) is connected to the heat pipe bottom heat storage pipe (5) through the connecting pipe group (8) to form an airport pavement system insulation section (B); A bottom tube temperature sensor (10) is installed inside the bottom heat storage tube (5); a heat storage circulation tube (4) is horizontally connected to both sides of the bottom heat storage tube (5); the heat storage circulation tube (4) is connected to the liquid storage chamber (D) through a circulation pump (17); a heat storage chamber heater (12) with a controller (13) is installed inside the liquid storage chamber (D); the controller is connected to the sensor through the bottom tube temperature signal line to construct the heat exchange section (C) of the airport pavement system. The other end of the heat pipe bottom heat storage pipe (5) is connected to the heat pipe top pipe (6) through the connecting pipe (8) to form the heat exchange section (C) of the airport pavement system; wherein: the heat pipe top pipe (6) is provided with a top pipe temperature sensor (14) 14 and a temperature control valve (16); the top pipe temperature sensor (14) is connected to the temperature control valve (16) through the top pipe temperature signal line (15); a heat insulation film (1) is provided between the heat pipe top pipe (6) and the connecting pipe (8); the heat pipe top pipe (6) is also connected with a top pipe heat exchange rib (7).

2. The system according to claim 1, characterized in that, The working medium is an organic mixture composed of liquid paraffin, methanol, ethylene glycol, and glycerol.

3. The system according to claim 2, characterized in that, The connecting pipe assembly consists of an outer connecting pipe (2) and an inner connecting pipe (3), and the working fluids in the outer connecting pipe (2) and the inner connecting pipe (3) have different temperature and pressure properties.

4. The system according to claim 3, characterized in that, The system operates on the road surface in winter: When it snows or the temperature is below 0℃ in winter, the heat exchange ribs (7) of the jacking pipe dissipate heat to the road surface to melt snow and prevent the road surface temperature from being too low; when the road surface temperature is high during the day in winter, the temperature sensor (14) of the jacking pipe transmits the temperature signal to the controller of the temperature control valve (16) through the temperature signal line (15) of the jacking pipe to control the valve to close, so as to ensure that the stored heat does not dissipate heat during the day in winter; the heat insulation film (1) makes the temperature of the left and right sides of the heat pipe jacking pipe (6) different, resulting in a density difference; and the working fluid dissipates heat to the road surface through the heat exchange ribs (7) of the jacking pipe to melt snow. The temperature of the working fluid decreases and it becomes solid and falls into the heat storage pipe (5) at the bottom of the heat pipe through the connecting pipe (8). The underground soil heats the working fluid in the heat storage pipe (5) at the bottom of the heat pipe through the heat exchange ribs (9) of the bottom pipe. Due to the density difference formed by the temperature difference, the hot working fluid in the heat storage pipe (5) at the bottom of the heat pipe rises to the heat pipe jacking pipe (6) through the outer pipe (2) and the inner pipe (3) of the connecting pipe to dissipate heat to the road surface to melt snow.

5. The system according to claim 3, characterized in that, The system operates on the road surface in summer: the heat from the road surface is separated from the working fluid in the heat pipe jacking tube (6) by the heat exchange ribs (7). The working fluid with a low melting point absorbs heat and rises to the upper part of the heat pipe jacking tube (6) and enters the outer pipe (2). The working fluid with a high melting point absorbs heat and enters the lower part of the heating heat pipe jacking tube (6) and enters the inner pipe (3). The pressure in the outer pipe (2) rises faster and the pressure in the entire pipe is higher. The working fluid in the outer pipe (2) at the bottom heat storage tube (5) of the heat pipe enters the bottom heat storage tube (5) of the heat pipe under the pressure, which raises the temperature of the working fluid in the bottom heat storage tube (5). The heat in the bottom heat storage tube (5) of the heat pipe is transferred to the soil for heat storage through the heat exchange ribs (9). The mixed working fluid after heat release rises to the heat pipe jacking tube (6) through the connecting pipe (8) to continue to absorb heat, thus storing the summer heat in the underground soil and realizing cross-seasonal heat storage. Furthermore, in extremely cold winters, based on the temperature signal from the bottom pipe temperature sensor, the controller controls the heater in the heat storage chamber to heat the working fluid, and the heat storage circulation pump realizes the heating of the working fluid in the bottom heat storage pipe of all the heat pipes connected in series, thereby realizing the control of the heat pipes and ensuring snow melting on the road surface in extremely cold winters.

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