A road temperature control system and a control method thereof

Abstract

The application provides a road temperature control system and a control method thereof, relates to the field of road safety, and can preheat the road according to the air temperature, thereby preventing icing. The road temperature control system comprises a water tank, a buried pipe device, a first variable frequency water pump, and a controller connected with the water tank and the first variable frequency water pump, wherein the controller is configured to acquire a road surface temperature t1, a first water tank temperature T1 and a first heat load Q1; when the road surface temperature t1 is less than a first preset temperature, a second heat load Q2 is determined according to the weather condition within a first preset time period; when the difference between the first heat load Q1 and the second heat load Q2 is less than or equal to a first preset value, the first variable frequency water pump is started, the water in the water tank is circulated in the buried pipe device, the road surface is heated, and the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1, so as to control the circulation flow of the water in the buried pipe device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road safety, in particular to a road temperature control system and a control method thereof. BACKGROUND

[0002] At present, the road surface is prone to snow and ice in winter, which greatly affects normal traffic. The current snow melting methods mainly include salt snow removal, conductive concrete, heating cable and ground source heat pump. However, the existing snow melting methods have certain defects and cannot effectively prevent the road surface from icing. SUMMARY

[0003] The embodiments of the present application provide a road temperature control system and a control method thereof, which solve the problem that the existing snow melting method cannot effectively prevent the road surface from icing.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] In a first aspect, the present application provides a road temperature control system, which comprises:

[0006] a water tank arranged under the road surface; a buried pipe device connected with the water tank and used for circulating water in the water tank to heat or cool the road; a first variable frequency water pump connected with the water tank and the buried pipe device respectively; a controller connected with the water tank and the first variable frequency water pump respectively, the controller being configured to: acquire a road surface temperature t1, a first water tank temperature T1 and a first heat load Q1 of the water tank; the first heat load Q1 represents the heat provided by the water tank for heating the road surface; in the case that the road surface temperature t1 is less than a first preset temperature, determine a second heat load Q2 according to the weather condition within a first preset time period; the second heat load Q2 represents the heat for preventing the road surface from icing; the weather condition includes temperature and / or humidity; determine a first difference value as the difference between the first heat load Q1 and the second heat load Q2; in the case that the first difference value is greater than a first preset value, start the first variable frequency water pump to circulate the water in the water tank in the buried pipe device to heat the road surface, and adjust the first variable frequency water pump according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the buried pipe device.

[0007] The technical scheme provided by the present application at least brings the following beneficial effects: in the case that the road surface temperature t1 is low, the difference between the first heat load Q1 and the second heat load Q2, i.e. the first difference value, is determined; according to the first difference value, it can be judged whether the water in the water tank is sufficient to preheat the road surface; in the case that the first difference value is greater than the first preset value, it indicates that the water in the water tank is sufficient to preheat the road surface, then the first variable frequency water pump is started to heat the road surface by using the water in the water tank, which has the effect of preventing the road surface from icing.

[0008] In some embodiments, the road temperature control system further comprises: a plurality of air source heat pump units for heating or cooling the water in the water tank; a second variable frequency water pump connected with the water tank and the plurality of air source heat pump units respectively, for driving the water in the water tank to circulate in the plurality of air source heat pump units; and a controller connected with the plurality of air source heat pump units and the second variable frequency water pump respectively, the controller being further configured to: obtain an ambient temperature t2 detected by the air source heat pump units; in a case where a first difference between the ambient temperature t2 and a first water tank temperature T1 is less than or equal to a first preset value and greater than a second preset value, control a first preset number of the air source heat pump units to start a heating mode, and start the second variable frequency water pump to make the water in the water tank circulate in the air source heat pump units to heat the water in the water tank; adjust the second variable frequency water pump according to a difference between the ambient temperature t2 and the first water tank temperature T1 to control a circulation flow rate of the water in the water tank in the air source heat pump units; in a case where the first difference is less than or equal to the second preset value, control a second preset number of the air source heat pump units to start the heating mode; the second preset number is greater than the first preset number.

[0009] In some embodiments, the controller is further configured to: after a first preset time length during which the second preset number of the air source heat pump units are controlled to start the heating mode, obtain a second water tank temperature T2 after the first preset time length; determine a third heat load Q3 according to the second water tank temperature T2, and determine a second difference between the second heat load Q2 and the third heat load Q3; in a case where the second difference is greater than the second preset value and less than or equal to the first preset value, shut down a third preset number of the air source heat pump units; the third preset number is less than the second preset number; in a case where the second difference is greater than the first preset value, shut down the second variable frequency water pump, and shut down the first preset number of the air source heat pump units.

[0010] In some embodiments, the controller is further configured to: in a case that the road surface temperature t1 is greater than a second preset temperature and less than or equal to a third preset temperature, start the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to reduce the road surface temperature t1, and adjust the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of the water in the underground pipe device; the second preset temperature is greater than the first preset temperature; in a case that the road surface temperature t1 is greater than the third preset temperature, start the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to reduce the road surface temperature t1, and adjust the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of the water in the underground pipe device; control a fourth preset number of air source heat pump units to start a cooling mode, and start the second variable frequency water pump to circulate the water in the water tank in the air source heat pump units to reduce the temperature of the water in the water tank; adjust the second variable frequency water pump according to a difference between the ambient temperature t2 and the first water tank temperature T1 to control a circulation flow rate of the water in the air source heat pump units; the third preset temperature is greater than the second preset temperature; after the fourth preset number of air source heat pump units start the cooling mode, increase or decrease the number of the air source heat pump units starting the cooling mode according to a difference between the road surface temperature t1 and the first water tank temperature T1 to adjust a cooling effect on the water in the water tank.

[0011] In some embodiments, the controller is further configured to: in a case that the road surface temperature t1 is less than or equal to the second preset temperature, control the plurality of air source heat pump units, the second variable frequency water pump and the first variable frequency water pump to be in an off state.

[0012] In some embodiments, the controller is further configured to: in a case that the road surface temperature t1 is less than a fourth preset temperature and greater than or equal to a fifth preset temperature, start the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to heat the road surface, and adjust the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of the water in the underground pipe device; the fourth preset temperature is less than the first preset temperature; in a case that the road surface temperature t1 is less than the fifth preset temperature, control a fifth preset number of air source heat pump units to start a heating mode, and start the second variable frequency water pump to circulate the water in the water tank in the air source heat pump units to heat the water in the water tank; adjust the second variable frequency water pump according to a difference between the ambient temperature t2 and the water tank temperature to control a circulation flow rate of the water in the air source heat pump units; the fifth preset temperature is less than the fourth preset temperature; after the fifth preset number of air source heat pump units start the heating mode, increase or decrease the number of the air source heat pump units starting the heating mode according to a difference between the first water tank temperature T1 and the road surface temperature t1 to adjust a heating effect on the water in the water tank.

[0013] In some embodiments, the controller is further configured to: in a case that the road surface temperature t1 is greater than or equal to a fourth preset temperature, control the plurality of air source heat pump units, the second variable frequency water pump and the first variable frequency water pump to be in an off state.

[0014] In some embodiments, the road temperature control system further comprises: an electric heating device arranged at a water outlet of the air source heat pump; a photovoltaic power storage device connected with the first variable frequency water pump, the second variable frequency water pump, the road surface temperature sensor, the water tank temperature sensor, the electric heating device and the plurality of air source heat pump units respectively; and a controller connected with the photovoltaic power storage device and the electric heating device respectively, the controller being further configured to: control the photovoltaic power storage device to supply power to the first variable frequency water pump, the second variable frequency water pump, the plurality of air source heat pump units and the electric heating device; and in a case that the road surface temperature t1 is less than a fifth preset temperature and continues to be less than a sixth preset temperature, turn on the electric heating device to heat the water flowing from the plurality of air source heat pump units to the water tank, the sixth preset temperature being less than the fifth preset temperature.

[0015] In some embodiments, the road temperature control system further comprises: a road surface temperature sensor for detecting a road surface temperature t1; and a water tank temperature sensor for detecting a water tank temperature; and a controller connected with the road surface temperature sensor and the water tank temperature sensor respectively, the controller being configured to obtain the road surface temperature t1, the water tank temperature and a first heat load Q1 of the water tank, including: obtaining the road surface temperature t1 detected by the road surface temperature sensor and the water tank temperature detected by the water tank temperature sensor, and determining the first heat load Q1 of the water tank according to the water tank temperature.

[0016] In a second aspect, the present application provides a control method of a road temperature control system, including: obtaining a road surface temperature t1, a first water tank temperature T1 and a first heat load Q1 of a water tank; the first heat load Q1 representing heat provided by the water tank for road surface heating; in a case that the road surface temperature t1 is less than a first preset temperature, determining a second heat load Q2 according to weather conditions within a first preset time period; the second heat load Q2 representing heat for preventing road surface icing; the weather conditions including temperature and / or humidity; determining a first difference value as a difference between the first heat load Q1 and the second heat load Q2; in a case that the first difference value is less than or equal to a first preset value, turning on a first variable frequency water pump to circulate water in the water tank in a buried pipe device to heat the road surface, and adjusting the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of the water in the buried pipe device.

[0017] In a third aspect, the present application provides a controller, comprising: one or more processors; one or more memories; wherein the one or more memories are configured to store computer program codes, the computer program codes comprising computer instructions, when the one or more processors execute the computer instructions, the controller executes the control method of the road temperature control system provided in the second aspect and possible implementation manners.

[0018] In a fourth aspect, the present application provides a computer readable storage medium, the computer readable storage medium comprising computer instructions, when the computer instructions are run on a computer, the computer instructions cause the computer to execute the control method of the road temperature control system provided in the second aspect and possible implementation manners.

[0019] In a fifth aspect, the present application provides a computer program product, the computer program product can be directly loaded into a memory and contains software codes, and the computer program product, when loaded and executed by a computer, can implement the control method of the road temperature control system provided in the second aspect and possible implementation manners.

[0020] It should be noted that the above computer instructions can be stored on the computer readable storage medium in whole or in part. The computer readable storage medium can be packaged together with the processor of the controller, or can be packaged separately from the processor of the controller, and the present application does not limit the same.

[0021] The beneficial effects of the second aspect to the fifth aspect of the present application are described above, and the beneficial effects of the first aspect are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A structural schematic diagram of a road temperature control system provided by an embodiment of the present application is shown in FIG. 1.

[0023] Figure 2 A partial relationship schematic diagram of a road temperature control system provided by an embodiment of the present application is shown in FIG. 2. Figure One

[0024] Figure 3 A partial relationship schematic diagram of a road temperature control system provided by an embodiment of the present application is shown in FIG. 3. Figure Two

[0025] Figure 4 A hardware connection relationship schematic diagram of a road temperature control system provided by an embodiment of the present application is shown in FIG. 4.

[0026] Figure 5 A flowchart of a control method of a road temperature control system provided by an embodiment of the present application is shown in FIG. 5. Figure One

[0027] Figure 6 ​​​A flowchart of a control method of a road temperature control system provided by an embodiment of the present application Figure Two ;

[0028] Figure 7 A flowchart of a control method of a road temperature control system provided by an embodiment of the present application Figure Three ;

[0029] Figure 8 A flowchart of a control method of a road temperature control system provided by an embodiment of the present application Figure Four ;

[0030] Figure 9 A flowchart of a control method of a road temperature control system provided by an embodiment of the present application Figure Five ;

[0031] Figure 10 A flowchart of a control method of a road temperature control system provided by an embodiment of the present application Figure Six ;

[0032] Figure 11 A hardware structure diagram of a controller provided by an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0034] The terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or detachably connected, or integrally connected. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, when describing the pipeline, the "connected" and "connected" used in the present application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0036] In the present embodiments, the word "exemplary" or "for example" is used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word example or of the words such as "example" is intended to present concepts in a concrete manner.

[0037] At present, the road surface is easy to accumulate snow and ice in winter, which greatly affects normal traffic. The current snow melting methods mainly include salt snow removal, conductive concrete, heating cable and ground source heat pump, etc. However, the existing snow melting methods have certain defects and cannot prevent the road surface from icing. In addition, high-temperature weather in summer also increases the number of vehicle tire burst accidents, and melts asphalt pavement or cracks cement pavement, etc.

[0038] Based on the above, the present embodiments provide a road temperature control system and a control method thereof. The road temperature control system can obtain a road surface temperature t1, a water tank temperature and a first heat load Q1 of the water tank. In the case that the road surface temperature t1 is less than a first preset temperature, the weather condition within a first preset time period is obtained, and the heat required to prevent the road surface from icing, i.e., a second heat load Q2, is determined. In the case that a first difference between the first heat load Q1 and the second heat load Q2 is less than or equal to a first preset value, it is indicated that the heat of the water in the water tank is sufficient to preheat the road surface. At this time, the first variable frequency water pump is started, and the first variable frequency water pump is adjusted according to the road surface temperature t1 and the water tank temperature, so as to preheat the road surface by using the water tank temperature. It is ensured that the road surface is preheated before low-temperature weather comes, thereby achieving the effect of preventing the road surface from icing.

[0039] As shown in Figure 1 The road temperature control system provided by the present embodiments can include a buried pipe device 101, a first variable frequency water pump 102, a photovoltaic power generation and storage device 103, an electric heating device 104, a water tank 105, a second variable frequency water pump 106, an air source heat pump unit 107, a road surface temperature sensor 108, and a water tank temperature sensor 109. The water tank 105 is placed under the road surface.

[0040] In some embodiments, the buried pipe device 101 includes a water inlet and a water outlet, and is used to circulate the water in the water tank 105 to heat or cool the road. For example, in high-temperature weather, the buried pipe device 101 circulates the low-temperature water in the water tank to cool the road.

[0041] In some embodiments, the working principle of the first variable frequency water pump 102 and the second variable frequency water pump 106 is to change the rotating speed of the water pump by using a frequency converter to adjust the flow rate and pressure of the water pump. The frequency converter generally has a closed-loop control function, which can automatically control the operation according to the pressure signal to achieve constant pressure water supply.

[0042] In some embodiments, the working principle of the photovoltaic power storage device 103 is to directly convert light energy into electrical energy by using the photovoltaic effect of the semiconductor interface, and store the electrical energy in the power storage device.

[0043] In some embodiments, referring to Figure 2 As shown in the figure, the photovoltaic power storage device 103 is connected with the first variable frequency water pump 102, the electric heating device 104, the second variable frequency water pump 106, the air source heat pump unit 107, the road surface temperature sensor 108 and the water tank temperature sensor 109 respectively, and provides power supply for the first variable frequency water pump 102, the electric heating device 104, the second variable frequency water pump 106, the air source heat pump unit 107, the road surface temperature sensor 108 and the water tank temperature sensor 109.

[0044] In some embodiments, the working principle of the electric heating device 104 is to convert electrical energy into heat energy by using the Joule effect of the resistance heating current to heat the object.

[0045] In some embodiments, as Figure 3 As shown in the figure, the electric heating device 104 is located at the connection of the air source heat pump unit 107 to the water tank 105.

[0046] In some embodiments, the water tank 105 is placed under the road surface, and the water tank 105 can be a stainless steel rib plate water tank, a stainless steel welded atmospheric water tank, etc., which is not specifically limited in the embodiments of the present application.

[0047] In some embodiments, the air source heat pump unit 107 can be composed of a compressor, a water pump, a liquid storage tank, a filter, a heat exchanger, an axial flow fan, a heat preservation water tank, an electronic expansion valve and an electronic controller, etc. The working principle of the air source heat pump unit 107 is to use the inverse Carnot principle to absorb a large amount of low-temperature heat energy in the air, and convert it into high-temperature heat energy by compression of the compressor. The working principle of refrigeration is to use the high-temperature refrigerant vapor generated by the compressor, and the refrigerant vapor condenses into liquid after releasing heat in the condenser, and the condensed liquid absorbs heat in the evaporator.

[0048] In some embodiments, the working principle of the sensor 108 and the water tank temperature sensor 109 is to convert temperature into available output signals by using the law that various physical properties of substances change with temperature.

[0049] As Figure 4 As shown in the figure, the road temperature control system further comprises a controller 110 connected with the first variable frequency water pump 102, the photovoltaic power storage device 103, the electric heating device 104, the water tank 105, the second variable frequency water pump 106, the air source heat pump unit 107, the road surface temperature sensor 108 and the water tank temperature sensor 109 respectively.

[0050] In some embodiments, the controller 110 refers to a device that can generate operation control signals according to instruction operation codes and timing signals, instructing the road temperature control system to execute control instructions. Exemplarily, the controller 110 can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller 110 can also be other devices with processing functions, such as a circuit, a device, or a software module, and the embodiments of the present application do not make any limitation in this regard.

[0051] Exemplarily, the controller 110 acquires the road surface temperature t1, the first water tank temperature T1, and the first heat load Q1 of the water tank; in the case that the road surface temperature t1 is less than a first preset temperature, the controller 110 determines a second heat load Q2 according to weather conditions within a first preset time period; the controller 110 determines a first difference value as a difference between the first heat load Q1 and the second heat load Q2; in the case that the first difference value is less than or equal to a first preset value, the controller 110 starts the first variable frequency water pump to circulate water in the water tank in the underground pipe device to heat the road surface. At the same time, the controller 110 adjusts the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device.

[0052] In some embodiments, the first variable frequency water pump 102 is started under the control of the controller 110 to drive water in the water tank 105 to circulate in the underground pipe device 101 to heat the road surface.

[0053] In some embodiments, the photovoltaic power generation and storage device 103 supplies power to the first variable frequency water pump 102, the electric heating device 104, the second variable frequency water pump 106, the air source heat pump unit 107, the road surface temperature sensor 108, and the water tank temperature sensor 109 under the control of the controller 110.

[0054] In some embodiments, the electric heating device 104 is started under the control of the controller 110 to heat water flowing into the water tank 105 from the air source heat pump unit 107.

[0055] In some embodiments, the second variable frequency water pump 106 is started under the control of the controller 110 to drive water in the water tank 105 to circulate in the air source heat pump unit 107 to heat or cool the water in the water tank 105 by the air source heat pump unit 107.

[0056] In some embodiments, the air source heat pump unit 107 is controlled by the controller 110 to start the heating mode or the cooling mode to heat or cool the water flowing through the air source heat pump unit 107.

[0057] In some embodiments, the controller 110 can obtain the road surface temperature t1 detected by the road surface temperature sensor 108 and the water tank temperature detected by the water tank temperature sensor 109.

[0058] In some embodiments, the controller 110 can also be configured to: obtain the road surface temperature t1, the first water tank temperature T1, and the first heat load Q1 of the water tank; the first heat load Q1 represents the heat provided by the water tank for road surface heating; in the case that the road surface temperature t1 is less than the first preset temperature, determine the second heat load Q2 according to the weather condition within the first preset time period; the second heat load Q2 represents the heat for preventing the road surface from icing; the weather condition includes temperature and / or humidity; determine the difference between the first heat load Q1 and the second heat load Q2 as a first difference; in the case that the first difference is greater than a first preset value, start the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to heat the road surface, and adjust the first variable frequency water pump according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device.

[0059] In some embodiments, the controller 110 can also be configured to: a plurality of air source heat pump units, the air source heat pump units being used to heat or cool the water in the water tank; a second variable frequency water pump connected with the water tank and the plurality of air source heat pump units respectively, for driving the water in the water tank to circulate in the plurality of air source heat pump units; the controller is further connected with the plurality of air source heat pump units and the second variable frequency water pump respectively, and the controller is further configured to: obtain the ambient temperature t2 detected by the air source heat pump unit; in the case that the first difference is less than or equal to the first preset value and greater than a second preset value, control the first preset number of air source heat pump units to start the heating mode, and start the second variable frequency water pump to circulate the water in the water tank in the air source heat pump units to heat the water in the water tank; adjust the second variable frequency water pump according to the difference between the ambient temperature t2 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the air source heat pump units; in the case that the first difference is less than or equal to the second preset value, control the second preset number of air source heat pump units to start the heating mode; the second preset number is greater than the first preset number.

[0060] In some embodiments, the controller 110 can be further configured to: after controlling the second preset number of air source heat pump units to be turned on in the heating mode for the first preset time length, obtain a second water tank temperature T2 after the first preset time length; determine a third heat load Q3 according to the second water tank temperature T2, and determine a second difference between the second heat load Q2 and the third heat load Q3; in a case where the second difference is less than or equal to the second preset value and greater than the first preset value, turn off a third preset number of air source heat pump units; the third preset number is less than the second preset number; in a case where the second difference is less than or equal to the first preset value, turn off the second variable frequency water pump, and turn off the first preset number of air source heat pump units.

[0061] In some embodiments, the controller 110 can be further configured to: in a case where the road surface temperature t1 is greater than a second preset temperature and less than or equal to a third preset temperature, turn on the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to reduce the road surface temperature t1, and adjust the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of the water in the water tank in the underground pipe device; the second preset temperature is greater than the first preset temperature; in a case where the road surface temperature t1 is greater than the third preset temperature, turn on the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to reduce the road surface temperature t1, and adjust the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of the water in the water tank in the underground pipe device; control a fourth preset number of air source heat pump units to be turned on in the cooling mode, and turn on the second variable frequency water pump to circulate the water in the water tank in the air source heat pump units to reduce the temperature of the water in the water tank; adjust the second variable frequency water pump according to a difference between an ambient temperature t2 and the first water tank temperature T1 to control a circulation flow rate of the water in the water tank in the air source heat pump units; the third preset temperature is greater than the second preset temperature; after the fourth preset number of air source heat pump units are turned on in the cooling mode, increase or decrease the number of air source heat pump units turned on in the cooling mode according to a difference between the road surface temperature t1 and the first water tank temperature T1 to adjust the cooling effect on the water in the water tank.

[0062] In some embodiments, the controller 110 can be further configured to: in a case where the road surface temperature t1 is less than or equal to the second preset temperature, control the plurality of air source heat pump units, the second variable frequency water pump, and the first variable frequency water pump to be in an off state.

[0063] In some embodiments, the controller 110 can be further configured to: in a case that the road surface temperature t1 is less than a fourth preset temperature and greater than or equal to a fifth preset temperature, start the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to heat the road surface, and adjust the first variable frequency water pump according to a difference between the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of the water in the water tank in the underground pipe device; the fourth preset temperature is less than the first preset temperature; in a case that the road surface temperature t1 is less than the fifth preset temperature, control a fifth preset number of air source heat pump units to start a heating mode, and start the second variable frequency water pump to circulate the water in the water tank in the air source heat pump units to heat the water in the water tank; adjust the second variable frequency water pump according to a difference between the ambient temperature t2 and the water tank temperature to control a circulation flow rate of the water in the water tank in the air source heat pump units; the fifth preset temperature is less than the fourth preset temperature; after the fifth preset number of air source heat pump units start the heating mode, increase or decrease the number of the air source heat pump units starting the heating mode according to a difference between the first water tank temperature T1 and the road surface temperature t1 to adjust a heating effect on the water in the water tank.

[0064] In some embodiments, the controller 110 can be further configured to: in a case that the road surface temperature t1 is greater than or equal to the fourth preset temperature, control the plurality of air source heat pump units, the second variable frequency water pump and the first variable frequency water pump to be in an off state.

[0065] In some embodiments, the controller 110 can be further configured to: control the photovoltaic power generation and storage device to supply power to the first variable frequency water pump, the second variable frequency water pump, the plurality of air source heat pump units and the electric heating device; in a case that the road surface temperature t1 is less than the fifth preset temperature and continues to be less than a sixth preset temperature, start the electric heating device to heat the water flowing from the plurality of air source heat pump units to the water tank; the sixth preset temperature is less than the fifth preset temperature.

[0066] In some embodiments, the controller 110 can be further configured to: acquire the road surface temperature t1 detected by the road surface temperature sensor and the water tank temperature detected by the water tank temperature sensor, and determine the first heat load Q1 of the water tank according to the water tank temperature.

[0067] From the above, in the method of the embodiments of the present application, the road surface temperature t1, the water tank temperature and the first heat load Q1 of the water tank are obtained, in the case where the road surface temperature t1 is less than the first preset temperature, the weather condition within the first preset time period is obtained, and the heat required for preventing the road surface from icing, i.e., the second heat load Q2, is determined. In the case where the first difference between the first heat load Q1 and the second heat load Q2 is less than or equal to the first preset value, it is indicated that the water in the water tank is sufficient to preheat the road surface, at this time, the first variable frequency water pump is started, and the first variable frequency water pump is adjusted according to the road surface temperature t1 and the water tank temperature, and the water tank temperature is used to preheat the road surface. In the case where the first difference is greater than the first preset value, it is indicated that the heat of the water in the water tank is insufficient to preheat the road surface, at this time, the second variable frequency pump is started, and the heating mode of part of the air source heat pump units is controlled to start, to heat the water in the water tank, and then the water in the water tank is used to preheat the road surface. In the case where the first difference is greater than the second preset value, it is indicated that the heat provided by part of the air source heat pump units is insufficient to preheat the road surface, at this time, the heating mode of the remaining air source heat pump units is controlled to start, to preheat the road surface. It is ensured that the road surface is preheated before the arrival of low-temperature weather, and the effect of preventing the road surface from icing is achieved.

[0068] Based on the above road temperature control system, as shown in Figure 5 The embodiments of the present application provide a control method of a road temperature control system, which comprises the following steps:

[0069] S101, obtaining a road surface temperature t1, a first water tank temperature T1 and a first heat load Q1 of the water tank.

[0070] The first heat load Q1 represents the heat provided by the water tank heating, and the water tank is placed under the road surface.

[0071] In some embodiments, the road surface temperature t1 detected by the road surface temperature sensor and the water tank temperature detected by the water tank temperature sensor are obtained, and the first heat load Q1 of the water tank is determined according to the water tank temperature.

[0072] S102, in the case where the road surface temperature t1 is less than the first preset temperature, the second heat load Q2 is determined according to the weather condition within the first preset time period.

[0073] The weather condition represents one or more of the ambient temperature, the relative humidity and the snowfall amount of the location where the road surface is located.

[0074] The second heat load Q2 represents the heat for preventing the road surface from icing.

[0075] For example, in the case where the road surface temperature t1 is less than the first preset temperature, the ambient temperature, the relative humidity and the snowfall amount of the location where the road is located within the first preset time period are obtained, and the heat required for preventing the road surface from icing is determined.

[0076] S103, determine a difference between the first heat load Q1 and the second heat load Q2 as a first difference.

[0077] In some embodiments, the first difference is a value of the second heat load Q2 minus the first heat load Q1.

[0078] For example, if the first difference is ΔQ, the first heat load Q1 is Q1, and the second heat load Q2 is Q2, then the first difference ΔQ = Q2 - Q1.

[0079] S104, in the case where the first difference is greater than a first preset value, start the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to heat the road surface.

[0080] In some embodiments, the first difference is a value of the first heat load Q1 minus the second heat load Q2.

[0081] In some embodiments, the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device, and the greater the difference, the faster the circulation flow rate of the water in the water tank in the underground pipe device.

[0082] In some embodiments, the difference between the road surface temperature t1 and the first water tank temperature T1 is a value of the first water tank temperature T1 minus the road surface temperature t1.

[0083] As can be seen from the above, in the above method of the embodiments of the present application, the water tank is placed under the road surface, which facilitates heat preservation of the water in the water tank; in the case where the difference between the first heat load Q1 of the water tank and the second heat load Q2 for preventing the road surface from freezing within a first preset time period is greater than a first preset value, at this time, the heat of the water in the water tank is sufficient to preheat the road surface, the first variable frequency water pump is started, and the heat of the water in the water tank is used to heat the road surface, thereby achieving the effect of preventing the road surface from freezing and reducing energy consumption. The first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the flow rate of the water in the water tank in the underground pipe device, which can enhance the heating effect on the road surface.

[0084] In the method provided in the embodiments of the present application, as shown in Figure 6 In the case where the road surface temperature t1 is less than a first preset temperature, the method further includes the following steps.

[0085] S201, in the case where the first difference is less than or equal to a first preset value and greater than a second preset value, start the first variable frequency water pump to circulate the water in the water tank in the underground pipe device to heat the road surface.

[0086] S202, control a first preset number of air source heat pump units to start a heating mode.

[0087] In some embodiments, in a case where the first difference is less than or equal to the second preset value, the second preset number of air source heat pump units are controlled to start the heating mode.

[0088] The first preset number is less than the second preset number.

[0089] S203, start the second variable frequency water pump to circulate the water in the water tank in the air source heat pump unit to heat the water in the water tank.

[0090] In some embodiments, the second variable frequency water pump is adjusted according to the difference between the ambient temperature t2 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the air source heat pump unit, and the greater the difference, the greater the circulation flow rate of the water in the water tank in the air source heat pump unit.

[0091] From the above, in the above method of the embodiments of the present application, in a case where the first difference is less than or equal to the first preset value and greater than the second preset value, the first preset number of air source heat pump units are controlled to start the heating mode to heat the water in the water tank. In a case where the first difference is less than or equal to the first preset value, i.e. the heat provided by the water in the water tank is insufficient to prevent the road surface from icing, part of the air source heat pump units are used to heat the water in the water tank to achieve the effect of preventing the road surface from icing. In a case where the first difference is less than or equal to the second preset value, it indicates that the heat provided by part of the air source heat pump units is insufficient to prevent the road surface from icing, at this time, more air source heat pump units are started to heat the water in the water tank to strengthen the effect of preventing the road surface from icing. At the same time, controlling different numbers of air source heat pump units to preheat the road surface in different cases can avoid waste of energy.

[0092] In the method provided in the embodiments of the present application, as shown in Figure 7 In a case where the road surface temperature t1 is less than the first preset temperature, the method further includes the following steps.

[0093] S301, after the first variable frequency water pump is started for a first preset time, the second water tank temperature T2 after the first preset time is obtained.

[0094] S302, according to the second water tank temperature T2, the third heat load Q3 is determined, and the second difference between the second heat load Q2 and the third heat load Q3 is determined.

[0095] In some embodiments, the second difference is the value of the third heat load Q3 minus the second heat load Q2.

[0096] S303, in a case where the second difference is greater than the second preset value and less than or equal to the first preset value, the third preset number of air source heat pump units are turned off.

[0097] The third preset number is less than the second preset number.

[0098] For example, a second preset number of air source heat pump units are opened. If the second difference after the first preset time period is greater than the second preset value and less than or equal to the first preset value, a third preset number of air source heat pump units are closed.

[0099] In some embodiments, in the case where the second difference is less than or equal to the second preset value, the second variable frequency water pump is kept open, and the first preset number of air source heat pump units are controlled to be in a heating state according to the difference between the ambient temperature and the water tank temperature.

[0100] In the case where the second difference is greater than the first preset value, the second variable frequency water pump is closed, and the plurality of air source heat pump units are controlled to be in a closed state.

[0101] For example, a first preset number of air source heat pump units are opened. If the second difference after the first preset time period is greater than the first preset value, the second variable frequency water pump and all air source heat pump units are closed.

[0102] From the above, in the above method of the embodiments of the present application, the second water tank temperature T2 after the first variable frequency water pump is opened for the first preset time period is used to determine the third heat load Q3, and the second heat load Q2 and the third heat load Q3 are used to determine the second difference. In the case where the second difference is greater than the second preset value and less than or equal to the first preset value, it is indicated that part of the air source heat pump units are closed, which can also prevent the road surface from icing. At this time, the third preset number of air source heat pump units are closed. In the case where the second difference is greater than the first preset value, it is indicated that the heat of the water in the water tank is sufficient to preheat the road surface. At this time, all air source heat pump units and the second variable frequency water pump can be closed. Timely closing of the excessive air source heat pump units avoids waste of energy.

[0103] In some embodiments, in the case where the road surface temperature t1 is greater than the second preset temperature and less than or equal to the third preset temperature, the first variable frequency water pump is opened to circulate the water in the water tank in the underground pipe device to reduce the road surface temperature t1.

[0104] For example, it is assumed that the second preset temperature is 30℃, and the road surface temperature t1 of the road A is 35℃. At this time, the road surface temperature t1 is greater than the second preset temperature, and the first variable frequency water pump is opened to circulate the water in the water tank in the underground pipe device to reduce the road surface temperature t1.

[0105] In some embodiments, the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device. The larger the difference between the road surface temperature t1 and the first water tank temperature T1, the higher the gear of the first variable frequency water pump, so as to control the circulation flow rate of the water in the water tank in the underground pipe device to be faster.

[0106] The difference between the road surface temperature t1 and the first water tank temperature T1 is the value of the road surface temperature t1 minus the first water tank temperature T1.

[0107] For example, the first variable frequency water pump has high, medium and low gears, the high gear is the fastest, when the difference between the road surface temperature t1 and the first water tank temperature T1 is greater than 15℃, the first variable frequency water pump is started at high gear; when the difference between the road surface temperature t1 and the first water tank temperature T1 is greater than 5℃ and less than or equal to 15℃, the first variable frequency water pump is started at medium gear; when the difference between the road surface temperature t1 and the first water tank temperature T1 is less than or equal to 5℃, the first variable frequency water pump is started at low gear.

[0108] From the above, in the above method of the embodiments of the present application, when the road surface temperature t1 is greater than the second preset temperature and less than or equal to the third preset temperature, it indicates that the road surface needs to be cooled down, at this time, the first variable frequency water pump is started, and the temperature of the water in the water tank is used to cool down the road surface, which can avoid accidents such as tire burst caused by high temperature of the road surface. At the same time, according to the difference between the road surface temperature t1 and the first water tank temperature T1, the first variable frequency water pump is adjusted, which can improve the cooling efficiency of the road surface.

[0109] The above method provided by the embodiments of the present application is further described below according to the content shown in the following table. Figure 8

[0110] First, the road surface temperature t1, the first water tank temperature T1 and the first heat load Q1 of the water tank are obtained, and when the road surface temperature t1 is less than the first preset temperature, the second heat load Q2 is determined according to the weather condition within the first preset time.

[0111] Secondly, the difference between the first heat load Q1 and the second heat load Q2 is determined as the first difference, and it is determined whether the first difference is greater than the first preset difference: when the first difference is greater than the first preset value, the first variable frequency water pump is started to circulate the water in the water tank in the underground pipe device to heat the road surface; when the first difference is less than or equal to the first preset value, it is determined whether the first difference is greater than the second preset value.

[0112] Further, when the first difference is greater than the second preset value and less than or equal to the first preset value, the second variable frequency water pump is started to circulate the water in the water tank in the underground pipe device, and the first preset number of air source heat pump units are started; when the first difference is less than or equal to the second preset value, the second variable frequency water pump is started to circulate the water in the water tank in the underground pipe device, and the second preset number of air source heat pump units are started.

[0113] ​Further, a second water tank temperature T2 after the first preset time length is obtained after the first variable frequency water pump is started for the first preset time length, a third heat load Q3 is determined according to the second water tank temperature T2, and a second difference between the second heat load Q2 and the third heat load Q3 is determined.

[0114] Further, it is confirmed whether the second difference is greater than a second preset value: in the case that the second difference is less than or equal to the second preset value, the second variable frequency water pump is kept on, and the first preset number of air source heat pump units are controlled to be in a heating state according to the difference between the road surface temperature t1 and the water tank temperature; in the case that the second difference is greater than the second preset value, it is confirmed whether the second difference is greater than a first preset value.

[0115] Further, in the case that the second difference is greater than the second preset value and less than or equal to the first preset value, the second variable frequency water pump is kept on, and the third preset number of air source heat pump units are turned off; in the case that the second difference is greater than the first preset value, the second variable frequency water pump is turned off, and the plurality of air source heat pump units are controlled to be in an off state; wherein the third preset number of air source heat pump units represents a part of the air source heat pump units that are in the heating state.

[0116] In some embodiments, referring to FIG. 1, the method provided by the embodiments of the present application further includes the following S401-S403. Figure 9

[0117] S401, in the case that the road surface temperature t1 is greater than a third preset temperature, the first variable frequency water pump is started to circulate the water in the water tank in the underground pipe device to reduce the road surface temperature t1.

[0118] Wherein, the third preset temperature is greater than the second preset temperature.

[0119] In some embodiments, the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device, and the higher the gear of the first variable frequency water pump, the faster the circulation flow rate of the water in the underground water tank in the underground pipe device is controlled.

[0120] Wherein, the difference between the road surface temperature t1 and the first water tank temperature T1 is the value of the road surface temperature t1 minus the first water tank temperature T1.

[0121] S402, a fourth preset number of air source heat pump units are controlled to be in a cooling mode.

[0122] In some embodiments, after the fourth preset number of air source heat pump units are in the cooling mode, the number of air source heat pump units in the cooling mode is increased or decreased according to the difference between the road surface temperature t1 and the first water tank temperature T1 to adjust the cooling effect on the water in the water tank.​

[0123] For example, 29 air source heat pump units are opened in the cooling mode, but the difference between the road surface temperature t1 and the first water tank temperature T1 is 15°C after the first preset time, and the difference between the road surface temperature t1 and the first water tank temperature T1 is 12°C before the first preset time. At this time, it is indicated that 29 air source heat pump units opened in the cooling mode are insufficient to effectively cool the road surface, and 5 air source heat pump units are opened in the cooling mode to improve the cooling effect of the water in the water tank.

[0124] S403, open the second variable frequency water pump to circulate the water in the water tank in the air source heat pump unit to reduce the temperature of the water in the water tank.

[0125] In some embodiments, the second variable frequency water pump is adjusted according to the difference between the ambient temperature t2 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the air source heat pump unit. The greater the difference between the road surface temperature t1 and the first water tank temperature T1, the higher the gear of the first variable frequency water pump, and the faster the circulation flow rate of the water in the buried water tank in the buried pipe device.

[0126] Wherein, the ambient temperature t2 represents the ambient temperature detected by the air source heat pump unit.

[0127] For example, the second variable frequency water pump has one gear, two gears and three gears. The speed of the first gear is the fastest, the speed of the third gear is the slowest, and the speed of the second gear is between the first gear and the third gear. When the difference between the road surface temperature t1 and the first water tank temperature T1 is greater than 15°C, the first variable frequency water pump is opened at the first gear; when the difference between the road surface temperature t1 and the water tank temperature is greater than 5°C and less than or equal to 15°C, the first variable frequency water pump is opened at the second gear; and when the difference between the road surface temperature t1 and the water tank temperature is less than or equal to 5°C, the first variable frequency water pump is opened at the third gear.

[0128] In some embodiments, in the case that the road surface temperature t1 is less than or equal to the second preset temperature, the plurality of air source heat pump units, the second variable frequency water pump and the first variable frequency water pump are controlled to be in the closed state.

[0129] For example, if the second preset temperature is 30°C, after cooling the road surface of road A for 40 min, it is detected that the road surface temperature t1 is 25°C, i.e., the road surface temperature t1 of road A is less than the second preset temperature, then all air source heat pump units, the second variable frequency water pump and the first variable frequency water pump of road A are controlled to be in the closed state.

[0130] It can be known from the above that, in the method provided in the embodiment of the application, in the case that the road surface temperature t1 is greater than the third preset temperature in high-temperature weather, at this time, the water in the water tank is insufficient to cool the road surface, the second variable frequency water pump is started while the first variable frequency water pump is started to circulate the water in the water tank in the underground pipe device, and the air source heat pump unit is started in the refrigeration mode to cool the water in the water tank, thereby enhancing the cooling effect on the road surface and ensuring that the road surface can be cooled even if the water in the water tank is insufficient to cool the road surface. Meanwhile, the second variable frequency water pump is adjusted according to the difference between the ambient temperature t2 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the air source heat pump unit, thereby improving the cooling effect on the water in the water tank.

[0131] In some embodiments, in the case that the road surface temperature t1 is less than the fourth preset temperature, the first variable frequency water pump is started to circulate the water in the water tank in the underground pipe device to heat the road surface.

[0132] For example, the fourth preset temperature is 0℃, and the road surface temperature t1 of the road A is -6℃, at this time, the road surface temperature t1 is less than the fourth preset temperature, and the first variable frequency water pump is started to circulate the water in the water tank in the underground pipe device to heat the road surface.

[0133] In some embodiments, the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device, the greater the difference between the road surface temperature t1 and the first water tank temperature T1, the higher the gear of the first variable frequency water pump, and the faster the circulation flow rate of the water in the underground water tank in the underground pipe device is controlled.

[0134] The difference between the road surface temperature t1 and the first water tank temperature T1 is the value of the first water tank temperature T1 minus the road surface temperature t1.

[0135] It can be known from the above that, in the method provided in the embodiment of the application, in the case that the road surface temperature t1 is less than the fourth preset temperature, at this time, the road surface needs to be heated and deiced, the first variable frequency water pump is started to heat the road surface by using the temperature of the water in the water tank, and a series of traffic accidents caused by the icing of the road surface can be avoided. Meanwhile, the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1, and the heating efficiency on the road surface can be improved.

[0136] In some embodiments, referring to FIG. 5, Figure 10 The method provided in the embodiment of the application further includes the following S501-S503.

[0137] S501, in the case that the road surface temperature t1 is less than the fifth preset temperature, the first variable frequency water pump is started to circulate the water in the water tank in the underground pipe device to heat the road surface.

[0138] In some embodiments, after the air source heat pump unit is started in heating mode, the number of air source heat pump units started in heating mode is increased or decreased according to the difference between the first water tank temperature T1 and the road surface temperature t1 to adjust the heating effect on the water in the water tank.

[0139] S502, control the fifth preset number of air source heat pump units to start heating mode.

[0140] In some embodiments, after the fifth preset number of air source heat pump units are started in heating mode, the number of air source heat pump units started in heating mode is increased or decreased according to the difference between the road surface temperature t1 and the first water tank temperature T1 to adjust the heating effect on the water in the water tank.

[0141] Wherein, the difference between the road surface temperature t1 and the first water tank temperature T1 is the value of the first water tank temperature T1 minus the road surface temperature t1.

[0142] For example, 30 air source heat pump units are started in heating mode, but after the first preset time, the difference between the road surface temperature t1 and the first water tank temperature T1 is 10℃, while the difference between the road surface temperature t1 and the first water tank temperature T1 before the first preset time is 8℃. At this time, it is indicated that starting 30 air source heat pump units in heating mode is not enough to effectively heat the road surface, and 10 air source heat pump units are started in heating mode to improve the heating effect on the water in the water tank.

[0143] In some embodiments, if the road surface temperature t1 is less than the fifth preset temperature, continue to be less than the sixth preset temperature, start the electric heating device to heat the water flowing from the air source heat pump unit to the water tank.

[0144] Wherein, the sixth preset temperature is less than the fifth preset temperature.

[0145] For example, the fifth preset temperature is -10℃, and the sixth preset temperature is -20℃. At this time, it is detected that the road surface temperature t1 of road A is -30℃, that is, the road surface temperature t1 of road A is less than the fifth preset temperature, and continues to be less than the sixth preset temperature. At this time, the electric heating device is started.

[0146] S503, start the second variable frequency water pump to circulate the water in the water tank in the air source heat pump unit and improve the temperature of the water in the water tank.

[0147] In some embodiments, the second variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the water tank temperature to control the circulation flow of the water in the water tank in the air source heat pump unit. The greater the difference between the road surface temperature t1 and the first water tank temperature T1, the higher the gear of the first variable frequency water pump, so as to control the circulation flow of the water in the buried water tank in the buried pipe device faster.

[0148] The difference between the road surface temperature t1 and the first water tank temperature T1 is the first water tank temperature T1 minus the road surface temperature t1.

[0149] In some embodiments, when the road surface temperature t1 is greater than or equal to a fourth preset temperature, multiple air source heat pump units, the second variable frequency water pump and the first variable frequency water pump are controlled to be in a closed state.

[0150] For example, after heating the road surface of road A for 30 minutes, if the road surface temperature t1 is detected to be greater than the fourth preset temperature, then all air source heat pump units, the second variable frequency water pump and the first variable frequency water pump of road A are controlled to be turned off.

[0151] As can be seen from the above, in the method described in this application embodiment, when the road surface temperature t1 is less than the fifth preset temperature in low-temperature weather, the heat of the water in the water tank is insufficient to melt the ice on the road surface. While the first variable frequency water pump is turned on to circulate the water in the water tank through the underground pipe device, the second variable frequency water pump is turned on, and the air source heat pump unit is activated in heating mode to heat the water in the water tank, enhancing the heating effect on the road surface and ensuring that the road surface can still be heated even when the water in the water tank is insufficient. When the road surface temperature t1 is less than the fifth preset temperature and continues to be less than the sixth degree Celsius, the electric heating device is turned on to further heat the water entering the water tank, improving the heating effect on the road surface. Simultaneously, adjusting the second variable frequency water pump according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank within the air source heat pump unit also improves the heating effect on the water in the water tank.

[0152] As can be seen, the above mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the embodiments of this application provide corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the modules and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0153] The embodiments of the present application can divide the functional modules of the controller according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated in one processing module. The integrated module can be realized in the form of hardware or in the form of a software functional module. Optionally, the division of the modules in the embodiments of the present application is illustrative, and is only a logical functional division. In actual implementation, another division manner can be used.

[0154] The embodiments of the present application also provide a hardware structure diagram of a controller, as shown in Figure 11 The controller 110 includes a processor 111, and optionally includes a memory 112 and a communication interface 113 connected with the processor 111. The processor 111, the memory 112 and the communication interface 113 are connected through a bus 114.

[0155] The processor 111 can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The processor 111 can also be any other device having a processing function, such as a circuit, a device or a software module. The processor 111 can include multiple CPUs, and the processor 111 can be a single-CPU processor or a multi-CPU processor. The processor herein can refer to one or more devices, circuits or processing cores for processing data (for example, computer program instructions).

[0156] The memory 112 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magnetic disk storage or other magnetic storage devices, or any other medium capable of storing desired program code in the form of instructions or data structures and that can be accessed by a computer, without any limitation on the present embodiments. The memory 112 can exist independently or be integrated with the processor 111. The memory 112 can contain computer program code. The processor 111 is configured to execute the computer program code stored in the memory 112, thereby implementing the control method provided by the embodiments of the present application.

[0157] The communication interface 113 can be configured to communicate with other devices or communication networks (e.g., an Ethernet, a radio access network (RAN), a wireless local area network (WLAN), etc.). The communication interface 113 can be a module, a circuit, a transceiver, or any device capable of communication.

[0158] The bus 114 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 114 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 11 Only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0159] The embodiments of the present application also provide a computer readable storage medium, including computer execution instructions, when running on a computer, causing the computer to execute any one of the control methods provided by the above embodiments.

[0160] The embodiment of the present application further provides a computer program product containing computer execution instructions, which, when running on a computer, causes the computer to execute any of the control methods provided by the above-mentioned embodiments.

[0161] In the above-mentioned embodiments, the implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented by using a software program, the implementation can be achieved entirely or partially in the form of a computer program product. The computer program product contains one or more computer execution instructions. When the computer execution instructions are loaded and executed on a computer, the entire or partial process or function according to the embodiments of the present application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer execution instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another, for example, the computer execution instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center through a wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL), or wireless (for example, infrared, wireless, microwave, etc.)) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or data storage device, such as one or more servers, data centers, etc., which can be integrated with the medium. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0162] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results. Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined by the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

[0163] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A roadway temperature control system, characterized by, The road temperature control system comprises: a water tank arranged under the road surface; a ground pipe device connected with the water tank and used for circulating water in the water tank to heat or cool the road; a first variable frequency water pump connected with the water tank and the ground pipe device respectively; a plurality of air source heat pump units used for heating or cooling water in the water tank; a second variable frequency water pump connected with the water tank and the plurality of air source heat pump units respectively and used for driving water in the water tank to circulate in the plurality of air source heat pump units; a controller connected with the water tank and the first variable frequency water pump respectively, and configured to: obtain a road surface temperature t1, a first water tank temperature T1 and a first heat load Q1 of the water tank; the first heat load Q1 represents heat provided by the water tank for heating the road surface; in a case where the road surface temperature t1 is less than a first preset temperature, determine a second heat load Q2 according to weather conditions within a first preset time period; the second heat load Q2 represents heat for preventing the road surface from icing; the weather conditions include temperature and / or humidity; determine a first difference value of the first heat load Q1 and the second heat load Q2; in a case where the first difference value is greater than a first preset value, start the first variable frequency water pump to make water in the water tank circulate in the ground pipe device to heat the road surface, and adjust the first variable frequency water pump according to a difference value of the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of water in the water tank in the ground pipe device; the controller is further connected with the plurality of air source heat pump units and the second variable frequency water pump respectively, and is further configured to: obtain an ambient temperature t2 detected by the air source heat pump unit; in a case where the first difference value is less than or equal to the first preset value and greater than a second preset value, start the first variable frequency water pump; control a first preset number of air source heat pump units to start a heating mode, and start the second variable frequency water pump to make water in the water tank circulate in the air source heat pump units; adjust the second variable frequency water pump according to a difference value of the ambient temperature t2 and the first water tank temperature T1 to control a circulation flow rate of water in the water tank in the air source heat pump units; in a case where the first difference value is less than or equal to the second preset value, start the first variable frequency water pump; control a second preset number of air source heat pump units to start the heating mode, and start the second variable frequency water pump; the second preset number is greater than the first preset number; in a case where the road surface temperature t1 is greater than a second preset temperature and less than or equal to a third preset temperature, start the first variable frequency water pump to make water in the water tank circulate in the ground pipe device to reduce the road surface temperature t1, and adjust the first variable frequency water pump according to a difference value of the road surface temperature t1 and the first water tank temperature T1 to control a circulation flow rate of water in the water tank in the ground pipe device; the second preset temperature is greater than the first preset temperature. in the case that the road surface temperature t1 is greater than the third preset temperature, the first variable frequency water pump is started to circulate water in the water tank in the ground pipe device to reduce the road surface temperature t1, and the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow of water in the water tank in the ground pipe device; a fourth preset number of air source heat pump units are controlled to start the refrigeration mode, and the second variable frequency water pump is started to circulate water in the water tank in the air source heat pump units to reduce the temperature of water in the water tank; the third preset temperature is greater than the second preset temperature; the second variable frequency water pump is adjusted according to the difference between the ambient temperature t2 and the first water tank temperature T1 to control the circulation flow of water in the water tank in the air source heat pump units; after the fourth preset number of air source heat pump units start the refrigeration mode, the number of air source heat pump units starting the refrigeration mode is increased or decreased according to the difference between the road surface temperature t1 and the first water tank temperature T1 to adjust the cooling effect on water in the water tank.

2. The roadway temperature control system of claim 1, wherein, The controller is further configured to: after the first variable frequency water pump is started for a first preset time length, a second water tank temperature T2 after the first preset time length is obtained; according to the second water tank temperature T2, a third heat load Q3 is determined, and a second difference between the second heat load Q2 and the third heat load Q3 is determined; in the case that the second difference is greater than the second preset value and less than or equal to the first preset value, a third preset number of air source heat pump units are turned off; the third preset number is less than the second preset number; in the case that the second difference is greater than the first preset value, the second variable frequency water pump and the plurality of air source heat pump units are turned off.

3. The roadway temperature control system of claim 1, wherein, The controller is further configured to: in the case that the road surface temperature t1 is less than or equal to the second preset temperature, the plurality of air source heat pump units, the second variable frequency water pump and the first variable frequency water pump are turned off.

4. The roadway temperature control system of claim 1, wherein, The controller is further configured to: in the case that the road surface temperature t1 is less than a fourth preset temperature and greater than or equal to a fifth preset temperature, the first variable frequency water pump is started to circulate water in the water tank in the ground pipe device to heat the road surface, and the first variable frequency water pump is adjusted according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow of water in the water tank in the ground pipe device; the fourth preset temperature is less than the first preset temperature; in the case that the road surface temperature t1 is less than the fifth preset temperature, a fifth preset number of air source heat pump units are controlled to start the heating mode, and the second variable frequency water pump is started to circulate water in the water tank in the air source heat pump units to heat water in the water tank; the fifth preset temperature is less than the fourth preset temperature; adjusting the second variable frequency water pump according to a difference between the ambient temperature t2 and the water tank temperature, to control a circulation flow rate of water in the water tank in the air source heat pump unit; after the fifth preset number of air source heat pump units are turned on in heating mode, increasing or decreasing the number of air source heat pump units turned on in heating mode according to a difference between the first water tank temperature T1 and the road surface temperature t1, to adjust a heating effect on the water in the water tank.

5. The roadway temperature control system of claim 4, wherein, The controller is further configured to: in the case that the road surface temperature t1 is greater than or equal to the fourth preset temperature, control the plurality of air source heat pump units, the second variable frequency water pump and the first variable frequency water pump to be in an off state.

6. The roadway temperature control system of claim 4, wherein, The road temperature control system further comprises: an electric heating device arranged at a water outlet of the air source heat pump unit; a photovoltaic power generation and storage device connected with the first variable frequency water pump, the second variable frequency water pump, the road surface temperature sensor, the water tank temperature sensor, the electric heating device and the plurality of air source heat pump units respectively; The controller is further connected with the photovoltaic power generation and storage device and the electric heating device respectively, and is further configured to: control the photovoltaic power generation and storage device to supply power to the first variable frequency water pump, the second variable frequency water pump, the plurality of air source heat pump units and the electric heating device; if the road surface temperature t1 is less than the fifth preset temperature and continues to be less than the sixth preset temperature, turn on the electric heating device to heat the water flowing from the plurality of air source heat pump units to the water tank; the sixth preset temperature is less than the fifth preset temperature.

7. The roadway temperature control system of claim 1, wherein, The road temperature control system further comprises: a road surface temperature sensor for detecting a road surface temperature t1; a water tank temperature sensor for detecting a water tank temperature; The controller is further connected with the road surface temperature sensor and the water tank temperature sensor respectively; The controller is configured to obtain the road surface temperature t1, the first water tank temperature T1 and a first heat load Q1 of the water tank, including: obtaining the road surface temperature t1 detected by the road surface temperature sensor, and obtaining the water tank temperature detected by the water tank temperature sensor, i.e. the first water tank temperature T1, determining the first heat load Q1 of the water tank according to the first water tank temperature T1.

8. A control method of a road temperature control system, characterized by, The control method is applied to the road temperature control system of any one of claims 1-7, and the control method comprises: obtaining the road surface temperature t1, the first water tank temperature T1 and a first heat load Q1 of the water tank; the first heat load Q1 represents heat provided by the water tank for road surface heating; in the case that the road surface temperature t1 is less than a first preset temperature, determining a second heat load Q2 according to weather conditions within a first preset time period; the second heat load Q2 represents heat for preventing road surface icing; the weather conditions include temperature and / or humidity; determining a difference between the first heat load Q1 and the second heat load Q2 as a first difference; In the case that the first difference is less than or equal to a first preset value, a first variable frequency water pump is started to circulate water in the water tank in the underground pipe device, heat the road surface, and adjust the first variable frequency water pump according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device. An ambient temperature t2 detected by the air source heat pump unit is obtained. In the case that the first difference is less than or equal to the first preset value and greater than a second preset value, a first variable frequency water pump is started. A first preset number of air source heat pump units are controlled to start the heating mode, and the second variable frequency water pump is started to circulate water in the water tank in the air source heat pump unit. The second variable frequency water pump is adjusted according to the difference between the ambient temperature t2 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the air source heat pump unit. In the case that the first difference is less than or equal to a second preset value, a first variable frequency water pump is started. A second preset number of air source heat pump units are controlled to start the heating mode, and the second variable frequency water pump is started; the second preset number is greater than the first preset number. In the case that the road surface temperature t1 is greater than a second preset temperature and less than or equal to a third preset temperature, the first variable frequency water pump is started to circulate water in the water tank in the underground pipe device, reduce the road surface temperature t1, and adjust the first variable frequency water pump according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device; the second preset temperature is greater than the first preset temperature. In the case that the road surface temperature t1 is greater than the third preset temperature, the first variable frequency water pump is started to circulate water in the water tank in the underground pipe device, reduce the road surface temperature t1, and adjust the first variable frequency water pump according to the difference between the road surface temperature t1 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the underground pipe device. A fourth preset number of air source heat pump units are controlled to start the cooling mode, and the second variable frequency water pump is started to circulate water in the water tank in the air source heat pump unit to reduce the temperature of the water in the water tank; the third preset temperature is greater than the second preset temperature. The second variable frequency water pump is adjusted according to the difference between the ambient temperature t2 and the first water tank temperature T1 to control the circulation flow rate of the water in the water tank in the air source heat pump unit. After the fourth preset number of air source heat pump units start the cooling mode, the number of air source heat pump units starting the cooling mode is increased or decreased according to the difference between the road surface temperature t1 and the first water tank temperature T1 to adjust the cooling effect on the water in the water tank.

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