Integrated road surface temperature control system

Abstract

The invention discloses an integrated road surface temperature control system, belongs to the technical field of road green construction, and aims to solve the technical problem of how to reduce resource loss on the premise of meeting snow melting of roads in winter and temperature control of roads in summer at the same time according to the technical scheme that the integrated road surface temperature control system comprises a temperature control unit, an intelligent master controller and a circulating pipeline, a working medium inlet and outlet pipe is arranged at one end of the circulating pipeline, one end of the working medium inlet and outlet pipe is communicated with the circulating pipeline, a working medium storage pool is arranged at the other end of the working medium inlet and outlet pipe, and a circulating pump unit is arranged on the working medium inlet and outlet pipe; one end of the vacuumizing pipe is communicated with the circulating pipeline, and the other end of the vacuumizing pipe is provided with a vacuum pump; the circulating pipeline is a circulating loop formed by sequentially communicating a plurality of branch pipe units; each branch pipe unit comprises two gravity assisted heat pipes arranged in parallel, two horizontal pipes arranged in parallel and a communicating pipe, and the two ends of the communicating pipe are communicated with one ends of the two horizontal pipes respectively to form a U-shaped communicating pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of green road construction, and in particular to an integrated road surface temperature control system. Background Art

[0002] Road heating and snow melting in winter and road cooling in summer are two road maintenance measures tailored to different seasonal climate conditions, aimed at improving road safety and traffic efficiency.

[0003] Traditional mechanical snow removal technology cannot melt snow on the road surface in real time and is prone to cause physical damage to the road surface. Chemical snow melting methods are costly and can easily cause corrosion to the road surface, seriously reducing the service life of the road. In summer, when the temperature of the asphalt road surface is too high, it is easy to soften and deform to form ruts. The traditional method of sprinkling water to cool down not only cannot effectively and timely cool down, but also has a general cooling effect, and wastes water resources.

[0004] Therefore, how to reduce resource loss while meeting the requirements of road snow melting in winter and road temperature control in summer is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical task of the present invention is to provide an integrated road surface temperature control system to solve the problem of how to reduce resource loss while meeting both winter road snow melting and summer road temperature control requirements.

[0006] The technical task of the present invention is achieved in the following manner: an integrated road surface temperature control system, the device includes a temperature control unit, an intelligent main controller and a circulation pipeline, a circulating working medium is arranged in the circulation pipeline, a working medium inlet and outlet pipe is arranged at one end of the circulation pipeline, one end of the working medium inlet and outlet pipe is connected to the circulation pipeline, a working medium storage tank is arranged at the other end of the working medium inlet and outlet pipe, and a circulation pump unit is arranged on the working medium inlet and outlet pipe; a vacuum tube is arranged at the other end of the circulation pipeline, one end of the vacuum tube is connected to the circulation pipeline, and a vacuum pump is arranged at the other end of the vacuum tube;

[0007] The circulation pipeline is a circulation loop formed by connecting several branch pipe units in sequence; the branch pipe unit includes two parallel gravity heat pipes, two parallel horizontal pipes and a connecting pipe, the connecting pipe is arranged between the two horizontal pipes and the two ends of the connecting pipe are respectively connected with one end of the two horizontal pipes to form a U-shaped connecting pipe, and the U-shaped connecting pipe is arranged horizontally on the road surface; the upper ends of the two gravity heat pipes are respectively connected with the other end of the horizontal pipe, the lower ends of the two gravity heat pipes are respectively connected with the gravity heat pipes of the adjacent branch pipe units and the two gravity heat pipes are arranged vertically in the roadbed, and the gravity heat pipes are used to take geothermal heat to achieve heating and snow melting in winter; each branch pipe unit is provided with a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are placed on the road surface;

[0008] The intelligent main controller and the temperature control unit are used to determine whether the road surface melts snow in winter and whether the road surface cools down in summer according to the road surface temperature and humidity, and then control the circulation pipeline.

[0009] Preferably, a working medium inlet and outlet valve is provided at the connection between the working medium inlet and outlet pipe and the circulation pipeline; a vacuum valve is provided at the connection between the vacuum pumping pipe and the circulation pipeline.

[0010] Preferably, the horizontal pipe and the gravity heat pipe on the same branch unit form an inverted L-shaped gravity pipeline.

[0011] Preferably, the pipe wall of the circulation pipeline is made of copper material.

[0012] Preferably, the circulating working medium is electronic fluorinated liquid FC-72.

[0013] Preferably, a support rod is provided on one side of the road surface, and the temperature control unit is installed on the support rod.

[0014] More preferably, the temperature control unit includes an image monitor, a meteorological monitor and a meteorological collector;

[0015] The intelligent main controller is used to make an overall judgment on the operation of the circulation pipeline according to the data collected by the temperature sensor, humidity sensor, image monitor, meteorological monitor and meteorological collector, and fully automatically control the operation mode of the circulation pipeline;

[0016] The temperature sensor and the humidity sensor are used to measure the real-time temperature and humidity of the road surface at a set frequency. When the temperature value and humidity value exceed the set threshold and it is determined that there is a risk of snow accumulation or icing, the measurement frequency is increased;

[0017] The image monitor is used to take pictures of the road surface conditions and compare them with the pre-entered road condition classification library, and then judge the road conditions;

[0018] The meteorological monitor is used to comprehensively monitor the environmental temperature, humidity, wind speed, atmospheric pressure, water vapor pressure and solar radiation intensity, and feed back each item of data to the intelligent main controller;

[0019] The meteorological collector is used to connect to the local meteorological data platform to obtain the real-time meteorological information of the corresponding location.

[0020] More preferably, the temperature sensor and the humidity sensor transmit the obtained road surface information to the intelligent main controller, and the intelligent controller makes a preliminary judgment on the feedback data and classifies the road surface conditions as follows:

[0021] ① Dry road surface: the road surface temperature is lower than 60 °C and the humidity is lower than 50%;

[0022] ② Wet road surface: the road surface temperature is lower than 60 °C and the humidity is between 50% and 90%;

[0023] ③ Wet road surface: road surface temperature is between 0 and 60 °C, humidity is greater than 90%;

[0024] ④ High-temperature road surface: road surface temperature is higher than 60 °C;

[0025] ⑤ Road surface with icing risk: temperature is lower than 0 °C, humidity is between 50 and 90%;

[0026] ⑥ Iced or snow-covered road surface: temperature is lower than 0 °C, humidity is greater than 90%.

[0027] More preferably, whether the road surface melts snow in winter is as follows:

[0028] When the intelligent main controller preliminarily determines the road condition as dry road surface, wet road surface or wet road surface through the data fed back by the temperature sensor and the humidity sensor, it is determined that there is no snow or icing risk on the road surface, and other devices of the system are not turned on, and the real-time temperature and humidity of the road surface are continuously measured and fed back at the initial set frequency;

[0029] When the intelligent main controller preliminarily determines the road condition as a road surface with icing risk or an ice-covered or snow-covered road surface through the data fed back by the temperature sensor and the humidity sensor, it is initially considered that there is a snow or icing risk on the road surface. At the same time, the road surface image monitor, the meteorological monitor and the meteorological collector are turned on to monitor the road condition and the environment. The image monitor, the meteorological monitor and the meteorological collector monitor and feed back the road condition and the environment at an optimized set frequency;

[0030] The intelligent main controller makes a comprehensive judgment on the road surface condition through the data fed back by the temperature sensor and the humidity sensor and the road surface image monitor. At the same time, it calculates the heat power required for the road surface to maintain a snow-free and ice-free state according to the data fed back by the meteorological monitor, and compares it with the limit heat exchange power of the circulation pipeline determined during the design of the circulation pipeline. When it is continuously determined that the road surface is a road surface with icing risk, an ice-covered or snow-covered road surface or the heat function required for the road surface to maintain a snow-free and ice-free state is greater than the limit heat exchange power of the circulation pipeline for more than the set time threshold, the working medium inlet and outlet valve is opened, and the working medium is injected from the working medium storage tank. After filling the circulation pipeline, the geothermal heat is absorbed by the fluid heating method for rapid snow melting on the road surface;

[0031] During the stage of starting the fluid heating method for snow melting, when the intelligent main controller obtains the snow-free weather in this area according to the meteorological collector, and at the same time the road surface condition is continuously determined as dry road surface, wet road surface, wet road surface category and the limit heat exchange power of the circulation pipeline is greater than the heat function required for the road surface to maintain a snow-free and ice-free state for more than the set time threshold, the working medium inlet and outlet valve is opened, the working medium in the circulation pipeline is pumped out to the working medium storage tank, a part of the working medium is reserved in the circulation pipeline, and then the vacuum valve is opened to pump out the gas in the circulation pipeline, and the geothermal heat is absorbed by the green and environmental protection gravity heat pipe heating method to melt the snow on the road surface.

[0032] Preferably, whether the road surface is cooled in summer is as follows:

[0033] When the intelligent main controller initially determines that the road condition is a high-temperature road surface through the data feedback from the temperature sensor and the humidity sensor, it is initially considered that there is a risk of high-temperature deformation of the road surface. At the same time, the road surface image monitor, the meteorological monitor, and the meteorological collector are activated to monitor the road condition and the environment. The image monitor, the meteorological monitor, and the meteorological collector monitor and feedback the road condition and the environment at a set frequency;

[0034] The intelligent main controller makes a comprehensive determination of the road surface condition through the data feedback from the temperature and humidity sensors and the road surface image monitor, the meteorological monitor, and the meteorological collector. When it continuously determines that the road surface is a high-temperature road surface for more than the minimum set time threshold, the working medium inlet and outlet valve is opened, and the working medium is injected from the working medium storage tank. After filling the circulation pipeline, the circulation pump unit is started, and the pipeline fluid circulation mode is adopted to cool the road surface;

[0035] During the stage of starting the pipeline fluid circulation mode for cooling, when the intelligent main controller obtains that there is no high-temperature weather in the local area according to the meteorological collector, and the road surface condition is continuously determined to be a dry road surface or a wet road surface or a damp road surface category for more than the maximum set time threshold, the circulation pump unit is closed;

[0036] When the intelligent main controller determines that there is no situation where the road surface condition is determined to be a high-temperature road surface within a continuously set time period, the intelligent main controller opens the working medium inlet and outlet valve, pumps out the working medium in the circulation pipeline to the working medium storage tank, opens the vacuum valve after reserving a part of the working medium in the circulation pipeline to pump out the gas in the circulation pipeline, and then enters the winter fluid heating mode again.

[0037] An integrated road surface temperature control system of the present invention has the following advantages:

[0038] (1) Based on the gravity heat pipe technology and the fluid pipeline technology, the present invention is used for winter snow melting and ice melting on roads and summer road surface cooling. On the premise of meeting the requirements of winter snow melting and summer temperature control of the road surface, the energy consumption is minimized; especially during the winter snow melting process, the reasonable utilization of shallow geothermal energy in road construction is fully utilized, saving energy;

[0039] (2) The circulation pipeline of the present invention is a circulation loop formed by sequentially connecting a plurality of branch pipe units; the connecting pipe on the branch pipe unit is arranged between two horizontal pipes, and both ends of the connecting pipe are respectively connected to one end of the two horizontal pipes to form a U-shaped connecting pipeline. The U-shaped connecting pipeline is horizontally arranged on the road surface; the upper ends of the two gravity heat pipes are respectively connected to the other ends of the horizontal pipes, and the lower ends of the two gravity heat pipes are respectively connected to the gravity heat pipes of adjacent branch pipe units, and both gravity heat pipes are vertically arranged in the roadbed. The gravity heat pipes are used to extract geothermal energy to realize winter heating and snow melting;

[0040] (3) In the present invention, a working fluid inlet / outlet valve and a vacuum pump valve are provided at the side road surface position. The working fluid inlet / outlet valve is externally connected to a circulating pump unit and a working fluid storage tank, and the vacuum pump valve is externally connected to a vacuum pump. The opening and closing of the valves are automatically determined by the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below with reference to the accompanying drawings.

[0042] Attached Figure 1 is a schematic structural diagram of an integrated road surface temperature control system;

[0043] Attached Figure 2 is a flow chart for judging road conditions;

[0044] Attached Figure 3 is a schematic flow diagram for judging whether the road surface melts snow in winter;

[0045] Attached Figure 4 is a schematic flow diagram for judging whether the road surface cools down in summer.

[0046] In the figure: 1. Circulating pipeline, 2. Working fluid inlet / outlet pipe, 3. Working fluid storage tank, 4. Circulating pump unit, 5. Vacuum extraction pipe, 6. Vacuum pump, 7. Gravity heat pipe, 8. Horizontal pipe, 9. Connecting pipe, 10. Temperature sensor, 11. Humidity sensor, 12. Working fluid inlet / outlet valve, 13. Vacuum valve, 14. Support rod, 15. Image monitor, 16. Meteorological monitor, 17. Meteorological collector, 18. Road surface, 19. Roadbed. DETAILED DESCRIPTION OF THE INVENTION

[0047] The following detailed description is made of an integrated road surface temperature control system of the present invention with reference to the accompanying drawings of the specification and specific embodiments.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Instead of indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Embodiment:

[0051] As shown in the Figure 1 accompanying drawings, this embodiment provides an integrated road surface temperature control system, the structure of which includes a temperature control unit, an intelligent main controller, and a circulation pipeline 1. The circulation pipeline 1 is filled with a circulating working medium. One end of the circulation pipeline 1 is installed with a working medium inlet and outlet pipe 2. One end of the working medium inlet and outlet pipe 2 is communicated with the circulation pipeline 1, and the other end of the working medium inlet and outlet pipe 2 is installed with a working medium storage tank 3. A circulation pump unit 4 is installed on the working medium inlet and outlet pipe 2; the other end of the circulation pipeline 1 is installed with a vacuum extraction pipe 5. One end of the vacuum extraction pipe 5 is communicated with the circulation pipeline 1, and the other end of the vacuum extraction pipe 5 is installed with a vacuum pump 6;

[0052] The circulation pipeline 1 is a circulation loop formed by sequentially connecting a number of branch pipe units; the branch pipe unit includes two parallelly arranged gravity heat pipes 7, two parallelly arranged horizontal pipes 8, and a connecting pipe 9. The connecting pipe 9 is installed between the two horizontal pipes 8, and both ends of the connecting pipe 9 are respectively connected to one end of the two horizontal pipes 8 to form a U-shaped connecting pipeline. The U-shaped connecting pipeline is horizontally arranged on the road surface 18; the upper ends of the two gravity heat pipes 7 are respectively connected to the other ends of the horizontal pipes 8, and the lower ends of the two gravity heat pipes 7 are respectively connected to the gravity heat pipes 7 of the adjacent branch pipe units, and both gravity heat pipes 7 are vertically arranged in the roadbed 19. The gravity heat pipes 7 are used to extract geothermal heat to achieve snow melting in winter; a temperature sensor 10 and a humidity sensor 11 are installed in each branch pipe unit, and the temperature sensor 10 and the humidity sensor 11 are arranged on the road surface 18;

[0053] The intelligent main controller and the temperature control unit are used to determine whether to melt snow on the road surface in winter and whether to cool down the road surface in summer according to the road surface temperature and humidity, and then control the circulation pipeline 1.

[0054] A working medium inlet and outlet valve 12 is installed at the connection between the working medium inlet and outlet pipe 2 and the circulation pipeline 1 in this embodiment; a vacuum valve 13 is installed at the connection between the vacuum extraction pipe 5 and the circulation pipeline 1.

[0055] In this embodiment, the horizontal pipe 8 and the gravity heat pipe 7 on the same branch pipe unit form an inverted L-shaped gravity pipeline.

[0056] The pipe wall of the circulation pipeline 1 in this embodiment is made of copper material.

[0057] In this embodiment, the circulating working fluid is the electronic fluorinated liquid FC-72.

[0058] On one side of the road surface 18 in this embodiment, a support rod 14 is installed, and the temperature control unit is installed on the support rod.

[0059] The temperature control unit in this embodiment includes an image monitor 15, a meteorological monitor 16, and a meteorological collector 17;

[0060] The intelligent main controller is used to make an overall judgment on the operation of the circulating pipeline 1 according to the data collected by the temperature sensor 10, the humidity sensor 11, the image monitor 15, the meteorological monitor 16, and the meteorological collector 17, and fully automatically control the operation mode of the circulating pipeline;

[0061] The temperature sensor 10 and the humidity sensor 11 are used to measure the real-time temperature and humidity of the road surface at a set frequency. When the temperature value and the humidity value exceed the set threshold and it is determined that there is a risk of snow accumulation or icing, the measurement frequency is increased;

[0062] The image monitor 15 is used to take pictures of the road surface conditions and compare them with the pre-entered road condition classification library, and then judge the road conditions;

[0063] The meteorological monitor 16 is used to comprehensively monitor the environmental temperature, humidity, wind speed, atmospheric pressure, water vapor pressure, and solar radiation intensity, and feed back each item of data to the intelligent main controller;

[0064] The meteorological collector 17 is used to connect to the local meteorological data platform to obtain the real-time meteorological information of the corresponding location.

[0065] As shown in the Figure 2 attachment, the temperature sensor 10 and the humidity sensor 11 in this embodiment transmit the obtained road surface information to the intelligent main controller, and the intelligent controller makes a preliminary judgment on the feedback data and classifies the road surface conditions into the following categories:

[0066] ① Dry road surface: The road surface temperature is lower than 60°C and the humidity is lower than 50%;

[0067] ② Wet road surface: The road surface temperature is lower than 60°C and the humidity is between 50% and 90%;

[0068] ③ Damp road surface: The road surface temperature is between 0°C and 60°C and the humidity is greater than 90%;

[0069] ④ High-temperature road surface: The road surface temperature is higher than 60°C;

[0070] ⑤ Road surface with icing risk: The temperature is lower than 0°C and the humidity is between 50% and 90%;

[0071] ⑥ Iced or snow-covered road surface: The temperature is lower than 0°C and the humidity is greater than 90%.

[0072] As shown in the appendix Figure 3 shown, whether the road surface melts snow in winter in this embodiment is as follows:

[0073] When the intelligent main controller preliminarily determines the road condition as a dry road surface, a wet road surface or a damp road surface through the data fed back by the temperature sensor 10 and the humidity sensor 11, it is determined that there is no risk of snow accumulation or icing on the road surface, and other devices of the system are not turned on, and the real-time temperature and humidity of the road surface are continuously measured and fed back at a frequency of 30 min / time;

[0074] When the intelligent main controller preliminarily determines the road condition as a road surface with an icing risk, an icy or snow-covered road surface through the data fed back by the temperature sensor 10 and the humidity sensor 11, it is initially considered that there is a risk of snow accumulation or icing on the road surface. At the same time, the road surface image monitor 15, the meteorological monitor 16 and the meteorological collector 17 are turned on to monitor the road condition and the environment. The image monitor 15, the meteorological monitor 16 and the meteorological collector 17 monitor and feed back the road condition and the environment at a frequency of 15 min / time;

[0075] The intelligent main controller makes a comprehensive determination of the road surface condition through the data fed back by the temperature sensor 10 and the humidity sensor 11 and the road surface image monitor 15. At the same time, it calculates the heat power required for the road surface to maintain a snow-free and ice-free state according to the data fed back by the meteorological monitor 16, and compares it with the limit heat exchange power of the circulation pipeline 1 determined during the design of the circulation pipeline 1. When it is continuously determined that the road surface is a road surface with an icing risk, an icy or snow-covered road surface or the heat function required for the road surface to maintain a snow-free and ice-free state is greater than the limit heat exchange power of the circulation pipeline 1 for more than 2 hours, the working medium inlet and outlet valve 12 is opened, and the working medium is injected from the working medium storage tank, and after filling the circulation pipeline 1, the geothermal heat is absorbed by the fluid heating method for rapid snow melting on the road surface;

[0076] During the stage of starting the fluid heating method for snow melting, when the intelligent main controller obtains the local snow-free weather according to the meteorological collector, and at the same time the road surface condition is continuously determined as a dry road surface, a wet road surface, a damp road surface category and the limit heat exchange power of the circulation pipeline 1 is greater than the heat function required for the road surface to maintain a snow-free and ice-free state for more than 2 hours, the working medium inlet and outlet valve is opened, the working medium in the circulation pipeline 1 is pumped out to the working medium storage tank 3, a part of the working medium is reserved in the circulation pipeline 1, and then the vacuum valve 13 is opened to pump out the gas in the circulation pipeline 1, and the geothermal heat is absorbed by the green and environmental protection gravity heat pipe heating method to melt the snow on the road surface.

[0077] As shown in the appendix Figure 4 shown, whether the road surface cools down in summer is as follows:

[0078] When the intelligent main controller initially determines that the road condition is a high-temperature road surface through the data feedback from the temperature sensor 10 and the humidity sensor 11, it initially believes that there is a risk of high-temperature deformation of the road surface. At the same time, it turns on the road surface image monitor 15, the meteorological monitor 16, and the meteorological collector 17 to monitor the road condition and the environment. The image monitor 15, the meteorological monitor 16, and the meteorological collector 17 monitor and feedback the road condition and the environment at a frequency of 15 minutes per time.

[0079] The intelligent main controller makes a comprehensive determination of the road condition through the data feedback from the temperature sensor 10 and the humidity sensor 11, as well as the road surface image monitor 15, the meteorological monitor 16, and the meteorological collector 17. When it continuously determines that the road surface is a high-temperature road surface for more than 1 hour, it turns on the working medium inlet and outlet valve 12, injects the working medium from the working medium storage tank 3, and after filling the circulation pipeline 1, it turns on the circulation pump unit 4 to cool the road surface in the pipeline fluid circulation mode.

[0080] During the stage of turning on the pipeline fluid circulation mode for cooling, when the intelligent main controller obtains that there is no high-temperature weather in the local area according to the meteorological collector 17, and the road condition is continuously determined to be a dry road surface or a wet road surface or a damp road surface category for more than 2 hours, it turns off the circulation pump unit 4.

[0081] When the intelligent main controller determines that there has been no situation where the road condition is determined to be a high-temperature road surface for 30 consecutive days, the intelligent main controller turns on the working medium inlet and outlet valve 12, pumps out the working medium in the circulation pipeline 1 to the working medium storage tank 3, leaves a part of the working medium in the circulation pipeline 1, and then turns on the vacuum valve 13 to pump out the gas in the circulation pipeline 1, and enters the winter fluid heating mode again.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated road surface temperature control system, characterized in that, The device includes a temperature control unit, an intelligent main controller, and a circulation pipeline. A circulation working medium is arranged in the circulation pipeline. One end of the circulation pipeline is provided with a working medium inlet and outlet pipe. One end of the working medium inlet and outlet pipe is connected to the circulation pipeline, and the other end of the working medium inlet and outlet pipe is provided with a working medium storage pool. A circulation pump unit is arranged on the working medium inlet and outlet pipe; the other end of the circulation pipeline is provided with a vacuum extraction pipe. One end of the vacuum extraction pipe is connected to the circulation pipeline, and the other end of the vacuum extraction pipe is provided with a vacuum pump. The circulation pipeline is a circulation loop formed by sequentially connecting a number of branch pipe units; each branch pipe unit includes two parallel gravity heat pipes, two parallel horizontal pipes, and a connecting pipe. The connecting pipe is arranged between the two horizontal pipes, and both ends of the connecting pipe are respectively connected to one end of the two horizontal pipes to form a U-shaped connecting pipeline. The U-shaped connecting pipeline is horizontally arranged on the road surface; the upper ends of the two gravity heat pipes are respectively connected to the other ends of the horizontal pipes, and the lower ends of the two gravity heat pipes are respectively connected to the gravity heat pipes of the adjacent branch pipe units, and both gravity heat pipes are vertically arranged in the roadbed. The gravity heat pipes are used to extract geothermal energy to realize snow melting by heating in winter; a temperature sensor and a humidity sensor are arranged in each branch pipe unit, and the temperature sensor and the humidity sensor are arranged on the road surface. The intelligent main controller and the temperature control unit are used to judge whether to melt snow on the road surface in winter and whether to cool down the road surface in summer according to the road surface temperature and humidity, and then control the circulation pipeline.

2. The integrated road surface temperature control system according to claim 1, wherein A working medium inlet and outlet valve is arranged at the connection between the working medium inlet and outlet pipe and the circulation pipeline; a vacuum valve is arranged at the connection between the vacuum extraction pipe and the circulation pipeline.

3. The integrated road surface temperature control system according to claim 1, wherein The horizontal pipe and the gravity heat pipe on the same branch pipe unit form an inverted L-shaped gravity pipeline.

4. The integrated road surface temperature control system according to claim 1, characterized in that, The pipe wall of the circulation pipeline is made of copper material.

5. The integrated road surface temperature control system according to claim 1, characterized in that, The circulation working medium uses electronic fluorinated liquid FC-72.

6. The integrated road surface temperature control system according to claim 1, wherein A support rod is arranged on one side of the road surface, and the temperature control unit is installed on the support rod.

7. The integrated road surface temperature control system according to any one of claims 1-6, characterized in that The temperature control unit includes an image monitor, a meteorological monitor, and a meteorological collector. The intelligent main controller is used to make an overall judgment on the operation of the circulation pipeline according to the data collected by the temperature sensor, the humidity sensor, the image monitor, the meteorological monitor, and the meteorological collector, and fully automatically control the operation mode of the circulation pipeline. The temperature sensor and the humidity sensor are used to measure the real-time temperature and humidity of the road surface at a set frequency. When the temperature value and the humidity value exceed the set threshold and it is judged that there is a risk of snow accumulation or icing, the measurement frequency is increased. The image monitor is used to take pictures of the road surface conditions and compare them with the pre-entered road condition classification library, and then judge the road conditions. The meteorological monitor is used to comprehensively monitor the environmental temperature, humidity, wind speed, atmospheric pressure, water vapor pressure, and solar radiation intensity, and feedback each item of data to the intelligent main controller. The meteorological collector is used to connect to the local meteorological data platform to obtain the real-time meteorological information of the corresponding location.

8. The integrated road surface temperature control system according to claim 7, characterized in that The temperature sensor and the humidity sensor transmit the obtained road surface information to the intelligent main controller. The intelligent controller makes a preliminary judgment on the feedback data and classifies the road surface conditions as follows: ① Dry road surface: The road surface temperature is lower than 60°C, and the humidity is lower than 50%. ② Wet road surface: The road surface temperature is lower than 60°C, and the humidity is between 50% and 90%. ③ Damp road surface: The road surface temperature is between 0°C and 60°C, and the humidity is greater than 90%. ④ High-temperature road surface: The road surface temperature is higher than 60°C; ⑤ Road surface with icing risk: The temperature is lower than 0°C and the humidity is between 50% and 90%; ⑥ Iced or snow-covered road surface: The temperature is lower than 0°C and the humidity is greater than 90%.

9. The integrated road surface temperature control system according to claim 8, wherein, Whether the road surface melts snow in winter is as follows: When the intelligent main controller preliminarily determines the road condition as a dry road surface, a wet road surface or a damp road surface through the data fed back by the temperature sensor and the humidity sensor, it is determined that there is no risk of snow accumulation or icing on the road surface, and other devices of the system are not turned on, and the real-time temperature and humidity of the road surface are continuously measured and fed back at the initial set frequency; When the intelligent main controller preliminarily determines the road condition as a road surface with icing risk or an iced or snow-covered road surface through the data fed back by the temperature sensor and the humidity sensor, it is initially considered that there is a risk of snow accumulation or icing on the road surface. At the same time, the road surface image monitor, the meteorological monitor and the meteorological collector are turned on to monitor the road condition and the environment. The image monitor, the meteorological monitor and the meteorological collector monitor and feed back the road condition and the environment at an optimized set frequency; The intelligent main controller makes a comprehensive determination of the road surface condition through the data fed back by the temperature sensor and the humidity sensor and the road surface image monitor. At the same time, it calculates the heat power required for the road surface to maintain a snow-free and ice-free state based on the data fed back by the meteorological monitor, and compares it with the limit heat exchange power of the circulation pipeline determined during the design of the circulation pipeline. When it is continuously determined that the road surface is a road surface with icing risk, an iced or snow-covered road surface or the heat function required for the road surface to maintain a snow-free and ice-free state is greater than the limit heat exchange power of the circulation pipeline for more than the set time threshold, the working medium inlet and outlet valve is opened, and the working medium is injected from the working medium storage tank. After filling the circulation pipeline, the fluid heating method is used to absorb geothermal heat for rapid snow melting on the road surface; During the stage of starting the fluid heating method for snow melting, when the intelligent main controller obtains the local snow-free weather through the meteorological collector, and at the same time the road surface condition is continuously determined as a dry road surface, a wet road surface or a damp road surface category and the limit heat exchange power of the circulation pipeline is greater than the heat function required for the road surface to maintain a snow-free and ice-free state for more than the set time threshold, the working medium inlet and outlet valve is opened, the working medium in the circulation pipeline is pumped out to the working medium storage tank, a part of the working medium is reserved in the circulation pipeline, and then the vacuum valve is opened to pump out the gas in the circulation pipeline, and the green and environment-friendly gravity heat pipe heating method is used to absorb geothermal heat to melt the snow on the road surface.

10. The integrated road surface temperature control system according to claim 9, wherein, Whether the road surface cools down in summer is as follows: When the intelligent main controller preliminarily determines the road condition as a high-temperature road surface through the data fed back by the temperature sensor and the humidity sensor, it is initially considered that there is a risk of high-temperature deformation of the road surface. At the same time, the road surface image monitor, the meteorological monitor and the meteorological collector are turned on to monitor the road condition and the environment. The image monitor, the meteorological monitor and the meteorological collector monitor and feed back the road condition and the environment at a set frequency; The intelligent main controller makes a comprehensive determination of the road surface condition through the data fed back by the temperature and humidity sensors and the road surface image monitor, the meteorological monitor and the meteorological collector. When it is continuously determined that the road surface is a high-temperature road surface for more than the minimum set time threshold, the working medium inlet and outlet valve is opened, the working medium is injected from the working medium storage tank, and after filling the circulation pipeline, the circulation pump unit is turned on to cool the road surface in a pipeline fluid circulation mode; In the cooling stage of starting the pipeline fluid circulation mode, when the intelligent main controller obtains that there is no high-temperature weather in the local area according to the meteorological collector, and the road surface condition continues to be judged as dry road surface or wet road surface or damp road surface category for more than the maximum set time threshold, the circulation pump unit is shut down; When the intelligent main controller determines that there is no situation where the road surface condition is judged as a high-temperature road surface within the continuously set time period, the intelligent main controller opens the working medium inlet and outlet valve, pumps out the working medium in the circulation pipeline to the working medium storage pool, opens the vacuum valve after reserving part of the working medium in the circulation pipeline, pumps out the gas in the circulation pipeline, and enters the winter fluid heating mode again.

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