Intelligent headlamp waste heat recovery system, control method thereof and vehicle

Abstract

The invention discloses an intelligent headlamp waste heat recovery system and a control method thereof and a vehicle, the system comprises a cooling loop, a warm air loop and a heat exchanger coupling the two loops, the cooling loop comprises a first electronic water pump, an intelligent headlamp, a first three-way proportional valve and the like, and the warm air loop comprises a PTC water heater, a second electronic water pump, a second three-way proportional valve and the like. And a temperature sensor is arranged in the intelligent headlamp. According to the control method, according to the heating requirement and the temperature of the large lamp wick body, modes such as the closed loop, independent heat dissipation of the cooling loop, independent heating of the warm air loop, double-loop waste heat transfer and forced heat dissipation are dynamically switched. According to the system, waste heat recycling of the intelligent headlamp is achieved, PTC energy consumption is reduced, the energy utilization rate and the whole vehicle endurance are improved, meanwhile, safe operation of the headlamp and heating comfort of a passenger compartment are guaranteed, and the system is suitable for various vehicles.

Description

Technical Field

[0001] This invention relates to the field of vehicle thermal management technology, specifically to an intelligent headlight waste heat recovery system, its control method, and a vehicle. Background Technology

[0002] Current automotive intelligent headlights use LED or laser light sources with high power density. When operating at high power, they generate significant heat. Initially, water-based thermal management systems were used, but excess heat was carried away by the system's cooling water, resulting in wasted heat. Simultaneously, in low-temperature conditions, the heating circuit typically uses PTC heaters, consuming substantial amounts of electricity and reducing the vehicle's driving range. Current technology lacks further research into heat regulation in intelligent headlights, failing to fully utilize this waste heat.

[0003] While existing technologies attempt to recover waste heat from vehicle powertrain systems, they have significant limitations: The multi-loop thermal management system proposed in patent CN119858421A couples the electric drive system, battery system, and air conditioning system through a three-way valve. Its core innovation lies in utilizing waste heat from the electric drive system to heat the battery and cabin, but the system architecture does not include a heat source for the intelligent headlights. This solution relies on the operating temperature of heat-generating components (such as the motor and inverter). During low-speed driving or cold starts, when the waste heat from the electric drive system itself is insufficient, PTC supplementary heating is still required, and it cannot utilize waste heat from high-power auxiliary equipment such as headlights.

[0004] The range-extended hybrid power system developed in patent CN114851804A directly connects the engine cooling circuit and the heater circuit via a three-way valve. While this achieves engine waste heat recovery, it has two key drawbacks: first, the engine coolant temperature typically needs to reach above 80°C to be usable, resulting in low heat recovery efficiency during cold starts; second, pure electric vehicles cannot use this solution because they lack an engine heat source. More importantly, the system treats the headlights as purely heat dissipation objects rather than potential heat sources, failing to establish an energy transfer channel between the headlights and the heater circuit.

[0005] The more fundamental problem lies in the fact that existing thermal management systems for intelligent headlights only employ a one-way heat dissipation logic: the cooling circuit is activated when the temperature exceeds a threshold, lacking the ability to actively regulate heat. This leads to energy waste in two typical scenarios: Scenario 1: In low-temperature winter environments, the headlights continue to operate, generating waste heat, but the heating system still requires the PTC to operate at full power; Scenario 2: When the headlights are hot and need to dissipate heat, the passenger compartment cannot utilize this heat because there is no need for heating.

[0006] Therefore, there is an urgent need to develop a new thermal management architecture that can both ensure the safe operating temperature of the headlights and transfer excess heat to the heating system on demand, achieving cross-system energy recycling. This invention, by coupling the cooling circuit and the heating circuit through a heat exchanger and combining it with the dynamic flow distribution of a three-way proportional valve, has for the first time constructed an energy transfer channel between intelligent headlights and passenger compartment heating, filling a gap in existing technology. Summary of the Invention

[0007] To address the technical problem of direct heat loss from intelligent headlights, which leads to energy waste and hinders the improvement of vehicle range, this invention aims to provide an intelligent headlight waste heat recovery system, its control method, and a vehicle. This invention achieves the recovery and utilization of intelligent headlight waste heat by coupling the cooling circuit and the heating circuit through a heat exchanger and controlling the on / off states of different components.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides an intelligent headlight waste heat recovery system, comprising: Cooling circuit, used to cool the vehicle's intelligent headlights; The heating circuit is used to provide heating heat to the crew cabin; A heat exchanger, coupling the cooling circuit and the heating circuit, is used to transfer heat from the cooling circuit to the heating circuit.

[0009] As a further optimization of the present invention, the cooling circuit includes a first circuit and a first electronic water pump, a smart headlight and a heat exchanger installed sequentially on the first circuit. The first electronic water pump is used to transport water heated by the smart headlight to the heat exchanger.

[0010] As a further optimization of the present invention, the cooling circuit further includes a first three-way proportional valve and a first water circuit. The first three-way proportional valve is installed on the first circuit between the intelligent headlight and the heat exchanger. Port one of the first three-way proportional valve is connected to the intelligent headlight, and port three is connected to the heat exchanger. A radiator is installed on the first water circuit. One end of the first water circuit is connected to port two of the first three-way proportional valve, and the other end is connected to the heat exchanger.

[0011] As a further optimization of the present invention, the warm air circuit includes a second circuit and a PTC water heater, a second electronic water pump, a heat exchanger and a warm air core installed sequentially on the second circuit. The second electronic water pump is used to transport water heated by the heat exchanger and / or the PTC water heater to the warm air core.

[0012] As a further optimization of the present invention, the warm air circuit also includes a second three-way proportional valve and a second water circuit. The second three-way proportional valve is installed on the second circuit between the second electronic water pump and the heat exchanger. Port one of the second three-way proportional valve is connected to the second electronic water pump, and port three is connected to the heat exchanger. One end of the second water circuit is connected to port two of the second three-way proportional valve, and the other end is connected to the warm air core.

[0013] As a further optimization of the present invention, the intelligent headlight is equipped with a temperature sensor inside, which is used to monitor the temperature of the intelligent headlight core in real time.

[0014] Secondly, the present invention provides a waste heat recovery control method, using the aforementioned intelligent headlight waste heat recovery system, wherein the method dynamically switches between the following modes based on the heating demand of the heating system and the core temperature T of the intelligent headlight: When there is no heating demand and T < T0, all circuits are shut off; When there is no heating demand and T≥T0, shut down the heating circuit and activate the cooling circuit for independent heat dissipation. When there is a heating demand and T < T0, the cooling circuit is closed and the heating circuit is activated for independent heating. When there is a heating demand and T0≤T<T1, the heating circuit and cooling circuit are activated, and the waste heat of the smart headlights is transferred to the heating circuit through the heat exchanger. When there is a heating demand and T≥T1, the heating circuit and cooling circuit are activated, and the waste heat of the smart headlights is transferred to the heating circuit through the heat exchanger, while the radiator is activated for forced heat dissipation. Where T0 and T1 are both set thresholds, and T1 > T0.

[0015] As a further optimization of the present invention, the activation of independent heat dissipation of the cooling circuit includes: controlling the first three-way proportional valve to connect port one and port two, and starting the first electronic water pump and radiator; The activation of independent heating of the warm air circuit includes: controlling the second three-way proportional valve to connect port one and port two, and starting the second electronic water pump and PTC water heater to operate at high power. The dual-loop control when T0≤T<T1 includes: controlling the first three-way proportional valve to connect port one and port three to start the first electronic water pump; at the same time, controlling the second three-way proportional valve to connect port one and port three to start the second electronic water pump and the PTC water heater to operate at low power. The dual-loop control when T≥T1 includes: controlling the first three-way proportional valve to connect port one and port two and port one and port three according to a preset ratio, while starting the first electronic water pump and the radiator; controlling the second three-way proportional valve to connect port one and port three, starting the second electronic water pump, and turning off the PTC water heater.

[0016] As a further optimization of the present invention, when the independent heating of the warm air circuit is activated and the temperature inside the passenger compartment is higher than the set threshold T2, the PTC water heater is stopped. When the temperature inside the passenger compartment is lower than the set threshold T2, heating continues according to the original control method. When using dual-loop control with T0≤T<T1 and the temperature inside the passenger compartment is higher than the set threshold T2, the first three-way proportional valve is controlled to connect port one and port two, and the radiator is started, and / or the second three-way proportional valve is controlled to connect port one and port two; when the temperature inside the passenger compartment is lower than the set threshold T2, heating continues according to the original control method. When a dual-loop control is used when T≥T1 and the temperature inside the passenger compartment is higher than the set threshold T2, the flow ratio of port one and port two of the first three-way proportional valve is increased, and the speed of the electric fan of the radiator is increased, and / or the second three-way proportional valve is connected to port one and port two; when the temperature inside the passenger compartment is lower than the set threshold T2, heating continues according to the original control method.

[0017] Thirdly, the present invention provides a vehicle equipped with the aforementioned waste heat recovery system and / or performing the aforementioned control method.

[0018] Compared with the prior art, the present invention has the following beneficial effects: Existing thermal management systems for intelligent headlights only employ unidirectional heat dissipation logic, failing to establish an energy transfer channel with the heating circuit. This invention, through an innovative design of a heat exchanger and a three-way proportional valve, achieves for the first time the active transfer of waste heat from the headlights to the passenger compartment, filling a technological gap in this field and providing a new solution for vehicle thermal management.

[0019] This invention primarily couples the cooling circuit and the heating circuit via a heat exchanger, transferring the heat generated by the intelligent headlights to the heating circuit for passenger compartment heating. Compared to existing technologies where headlight waste heat is directly dissipated through the cooling circuit, this design avoids heat waste and achieves cross-system energy recycling. When the intelligent headlight temperature is between T0 and T1, the heating circuit can utilize the headlight waste heat to operate the PTC water heater at low power; when the temperature is ≥ T1, the PTC water heater is shut off, relying entirely on the headlight waste heat for heating. This significantly reduces the PTC's power consumption, especially in low-temperature environments, effectively improving the vehicle's driving range.

[0020] The first three-way proportional valve in the cooling circuit cooperates with the radiator to dynamically adjust the heat dissipation path according to the headlight temperature: when the temperature ≥ T0 and there is no heating demand, independent heat dissipation of the cooling circuit is enabled; when the temperature ≥ T1, the proportional valve diverts the flow and starts forced heat dissipation of the radiator to ensure that the temperature of the headlight core body is maintained within the safe range (from T0 to T1) to avoid overheating damage. The control method dynamically switches five working modes (such as closing all circuits, single-circuit operation, double-circuit linkage, etc.) according to the heating demand and the headlight temperature T to achieve "energy supply on demand". For example, when there is no heating demand and T < T0, all circuits are closed to save energy; when there is a heating demand and T ≥ T0, the double-circuit is enabled to recover heat, taking into account both heat dissipation and heating demands.

[0021] The three-way proportional valves (the first three-way proportional valve and the second three-way proportional valve) in the cooling circuit and the heating circuit can adjust the flow rate through the port connection state. For example, when T ≥ T1, the first three-way proportional valve diverts the flow according to a preset ratio, which not only ensures the heat dissipation of the headlight but also transfers part of the waste heat to the heating circuit; when the temperature in the passenger compartment is higher than the set threshold T2, the heat transfer can be cut off by adjusting the three-way valve to avoid overheating.

[0022] The heating circuit dynamically adjusts the heating mode through the synergistic effect of the PTC water heater and the waste heat of the headlight, and introduces the cabin temperature feedback T2 to maintain constant temperature heating, improving the comfort of the passenger compartment. For example, when heating independently, if the temperature is higher than T2, the PTC stops working to avoid energy waste; if it is lower than T2, heating is resumed to ensure the stability of the cabin temperature. Compared with the existing solutions that simply rely on PTC heating or direct dissipation of the waste heat of the headlight, the present invention can significantly reduce the energy consumption of the whole vehicle through waste heat recovery and intelligent control. It is estimated that in a low-temperature environment, the PTC energy consumption can be reduced by more than 30%, thereby increasing the cruising range by about 10% - 15%. Brief Description of the Drawings

[0023] Figure 1 It is a schematic layout structure diagram of the waste heat recovery system of the present invention.

[0024] In the figure: 1. Cooling circuit; 101. First circuit; 102. First electronic water pump; 103. Intelligent headlight; 104. First three-way proportional valve; 105. First waterway; 106. Temperature sensor; 107. Radiator; 2. Heating circuit; 201. Second circuit; 202. PTC water heater; 203. Second electronic water pump; 204. Heating core body; 205. Second three-way proportional valve; 206. Second waterway; 3. Heat exchanger; a. Port one; b. Port two; c. Port three. Detailed Description of the Invention

[0025] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present invention. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. For those skilled in the art, the omission of certain well-known structures and their descriptions in the drawings is understandable. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present invention.

[0026] like Figure 1 As shown, this embodiment of the invention provides an intelligent headlight waste heat recovery system, including a cooling circuit 1, a heating circuit 2, and a heat exchanger 3. The cooling circuit 1 is used to cool the vehicle's intelligent headlight 103; the heating circuit 2 is used to provide heating to the passenger compartment; the heat exchanger 3 couples the cooling circuit 1 and the heating circuit 2, with both circuits sharing a single heat exchanger 3, used to transfer heat from the cooling circuit 1 to the heating circuit 2. This waste heat recovery system can recover and utilize waste heat from the cooling circuit, improving passenger compartment heating comfort, reducing overall vehicle energy consumption, and thus increasing the vehicle's range in low temperatures.

[0027] In some embodiments, the cooling circuit 1 includes a first circuit 101 and a first electronic water pump 102, a smart headlight 103, and a heat exchanger 3 sequentially installed on the first circuit 101. The first electronic water pump 102 is used to deliver water heated by the smart headlight 103 to the heat exchanger 3. The first electronic water pump in the cooling circuit delivers water heated by the headlight to the heat exchanger, ensuring the directional circulation of hot water in the cooling circuit and ensuring that the heat generated by the headlight can be effectively delivered to the heat exchanger, providing power support for the subsequent heat transfer to the heating circuit.

[0028] Specifically, cooling circuit 1 also includes a first three-way proportional valve 104 and a first water path 105. The first three-way proportional valve 104 is installed on the first circuit 101 between the intelligent headlight 103 and the heat exchanger 3. Port one of the first three-way proportional valve 104 is connected to the intelligent headlight 103, and port three is connected to the heat exchanger 3. A radiator 107 is installed on the first water path 105. One end of the first water path 105 is connected to port two of the first three-way proportional valve 104, and the other end is connected to the heat exchanger 3. The first three-way proportional valve in the cooling circuit can switch the port connection state. In conjunction with the first water path with a radiator, it can transfer waste heat through the heat exchanger and can also start the radiator to dissipate heat independently when needed, realizing flexible switching of the cooling path and ensuring the temperature safety of the headlight under different operating conditions.

[0029] In some embodiments, the heating circuit 2 includes a second circuit 201 and a PTC water heater 202, a second electronic water pump 203, a heat exchanger 3, and a heating core 204 sequentially installed on the second circuit 201. The second electronic water pump 203 is used to deliver water heated by the heat exchanger 3 and / or the PTC water heater 202 to the heating core 204. The second electronic water pump in the heating circuit delivers the water heated by the heat exchanger and / or PTC to the heating core, ensuring that the heated water is efficiently delivered to the heating terminal, providing stable heat to the passenger compartment. At the same time, the synergy between the heat exchanger and the PTC enhances the adaptability of the heating system.

[0030] Specifically, the heating circuit 2 also includes a second three-way proportional valve 205 and a second water circuit 206. The second three-way proportional valve 205 is installed on the second circuit 201 between the second electronic water pump 203 and the heat exchanger 3. Port one of the second three-way proportional valve 205 is connected to the second electronic water pump 203, and port three is connected to the heat exchanger 3. One end of the second water circuit 206 is connected to port two of the second three-way proportional valve 205, and the other end is connected to the heating core 204. The second three-way proportional valve in the heating circuit can switch the port connection state. In conjunction with the second water circuit, it can utilize the waste heat from the headlights through the heat exchanger, and can also independently activate PTC heating, realizing flexible switching of the heating mode of the heating circuit to meet different heating needs.

[0031] In some embodiments, the intelligent headlight 103 is equipped with a temperature sensor 106 for real-time monitoring of the core temperature of the intelligent headlight 103. The real-time monitoring of the core temperature by the temperature sensor inside the intelligent headlight provides accurate data support for temperature-based mode switching in the control method, ensuring that the system dynamically adjusts according to the actual headlight temperature and improving control accuracy.

[0032] Based on a general inventive concept, this invention also provides a waste heat recovery control method, which dynamically switches between the following modes according to the heating demand of the heating system and the core temperature T of the intelligent headlight 103: Mode 1: When there is no heating demand and T < T0, shut down all circuits. This avoids energy waste when there is no demand and achieves energy conservation.

[0033] Mode 2: When there is no heating demand and T≥T0, turn off the heating circuit 2 and activate the cooling circuit 1 for independent heat dissipation.

[0034] Specifically, enabling independent heat dissipation of cooling circuit 1 includes: controlling the first three-way proportional valve 104 to connect port one and port two, starting the first electronic water pump 102 and radiator 107, which can prevent the headlights from overheating and avoid the heating circuit from operating ineffectively, thus taking into account both equipment safety and energy saving.

[0035] Mode 3: When there is a heating demand and T < T0, cooling circuit 1 is shut down, and heating circuit 2 is activated independently for heating. This ensures that heating needs are quickly met when no residual heat is available, guaranteeing passenger comfort.

[0036] Specifically, activating independent heating in the warm air circuit 2 includes: controlling the second three-way proportional valve 205 to connect port one and port two, and starting the second electronic water pump 203 and PTC water heater to operate at high power.

[0037] Furthermore, when the temperature inside the passenger cabin exceeds the set threshold T2, the PTC water heater stops operating; when the temperature inside the passenger cabin falls below the set threshold T2, heating continues according to the original control method. During independent heating, the PTC's start and stop are controlled based on the passenger cabin temperature T2 to prevent excessively high cabin temperatures, reduce ineffective PTC energy consumption, and maintain a comfortable temperature.

[0038] Mode 4: When there is a heating demand and T0≤T<T1, the heating circuit 2 and cooling circuit 1 are activated, and the waste heat of the smart headlight 103 is transferred to the heating circuit 2 through the heat exchanger 3 to realize energy recovery and utilization.

[0039] Specifically, the dual-loop control when T0 ≤ T < T1 includes: controlling the first three-way proportional valve 104 to connect port one and port three, starting the first electronic water pump 102; simultaneously, controlling the second three-way proportional valve 205 to connect port one and port three, starting the second electronic water pump 203 and enabling the PTC water heater to operate at low power. Dual-loop operation transfers waste heat through a heat exchanger, reducing PTC energy consumption and achieving efficient utilization of waste heat.

[0040] Furthermore, when the temperature inside the passenger compartment is higher than the set threshold T2, the first three-way proportional valve 104 is controlled to connect ports one and two, and the radiator 107 is activated, and / or the second three-way proportional valve 205 is controlled to connect ports one and two; when the temperature inside the passenger compartment is lower than the set threshold T2, heating continues according to the original control method. During dual-loop operation, the valves and radiators are adjusted according to the passenger compartment temperature T2 to prevent overheating, flexibly control heat transfer, and balance comfort and energy saving.

[0041] Mode 5: When there is a heating demand and T≥T1, the heating circuit 2 and cooling circuit 1 are activated, and the waste heat of the smart headlight 103 is transferred to the heating circuit 2 through the heat exchanger 3. At the same time, the radiator 107 is activated for forced heat dissipation.

[0042] Specifically, the dual-loop control when T≥T1 includes: controlling the first three-way proportional valve 104 to connect port one and port two, as well as port one and port three, according to a preset ratio, while simultaneously starting the first electronic water pump 102 and the radiator 107; controlling the second three-way proportional valve 205 to connect port one and port three, starting the second electronic water pump 203, and turning off the PTC water heater. The waste heat from the intelligent headlight 103 is transferred to the warm air circuit 2 through a heat exchanger, achieving energy recovery and utilization. Simultaneously, to prevent the headlight from overheating, excess heat is transferred to the surrounding environment through the radiator 107 and the electric fan.

[0043] Furthermore, when the cabin temperature exceeds the set threshold T2, the flow ratio of ports one and two of the first three-way proportional valve 104 is increased, and the speed of the electric fan of the radiator 107 is increased; and / or, the second three-way proportional valve 205 is connected to ports one and two. When the cabin temperature is below the set threshold T2, heating continues according to the original control method. The valves and fan speed are adjusted according to the cabin temperature T2 to maintain a comfortable cabin temperature by enhancing heat dissipation or cutting off heat transfer, while ensuring the headlights operate within a safe temperature range.

[0044] Based on a general inventive concept, embodiments of the present invention provide a vehicle equipped with a waste heat recovery system and / or a control method for performing such a system. Vehicles equipped with this system and method can improve energy efficiency, reduce energy consumption, especially reducing PTC power consumption in low-temperature environments, extending driving range, while optimizing the heating experience and enhancing vehicle competitiveness.

[0045] Based on the description and accompanying drawings of this invention, those skilled in the art can readily manufacture or use the intelligent headlight waste heat recovery system and its control method and vehicle as described in this invention, and can achieve the positive effects described in this invention.

[0046] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0047] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An intelligent headlight waste heat recovery system, characterized in that, include: Cooling circuit (1) is used to cool the vehicle-mounted intelligent headlights (103). The heating circuit (2) is used to provide heating heat to the crew cabin; The heat exchanger (3) couples the cooling circuit (1) and the warm air circuit (2) to realize the transfer of heat from the cooling circuit (1) to the warm air circuit (2).

2. The intelligent headlight waste heat recovery system according to claim 1, characterized in that: The cooling circuit (1) includes a first circuit (101) and a first electronic water pump (102), a smart headlight (103) and a heat exchanger (3) installed sequentially on the first circuit (101). The first electronic water pump (102) is used to deliver water heated by the smart headlight (103) to the heat exchanger (3).

3. The intelligent headlight waste heat recovery system according to claim 2, characterized in that: The cooling circuit (1) further includes a first three-way proportional valve (104) and a first water circuit (105). The first three-way proportional valve (104) is installed on the first circuit (101) between the intelligent headlight (103) and the heat exchanger (3). One port of the first three-way proportional valve (104) is connected to the intelligent headlight (103), and the third port is connected to the heat exchanger (3). A radiator (107) is installed on the first water circuit (105). One end of the first water circuit (105) is connected to the second port of the first three-way proportional valve (104), and the other end is connected to the heat exchanger (3).

4. The intelligent headlight waste heat recovery system according to claim 1, characterized in that: The warm air circuit (2) includes a second circuit (201) and a PTC water heater (202), a second electronic water pump (203), a heat exchanger (3) and a warm air core (204) installed sequentially on the second circuit (201). The second electronic water pump (203) is used to transport water heated by the heat exchanger (3) and / or the PTC water heater (202) to the warm air core (204).

5. The intelligent headlight waste heat recovery system according to claim 4, characterized in that: The heating circuit (2) also includes a second three-way proportional valve (205) and a second water circuit (206). The second three-way proportional valve (205) is installed on the second circuit (201) between the second electronic water pump (203) and the heat exchanger (3). One port of the second three-way proportional valve (205) is connected to the second electronic water pump (203), and the third port is connected to the heat exchanger (3). One end of the second water circuit (206) is connected to the second port of the second three-way proportional valve (205), and the other end is connected to the heating core (204).

6. The intelligent headlight waste heat recovery system according to claim 1, characterized in that: The intelligent headlight (103) is equipped with a temperature sensor (106) for real-time monitoring of the core temperature of the intelligent headlight (103).

7. A waste heat recovery control method, characterized in that, Using the intelligent headlight waste heat recovery system according to any one of claims 1-6, the method dynamically switches the following modes based on the heating demand of the heating system and the core temperature T of the intelligent headlight (103): When there is no heating demand and T < T0, all circuits are shut off; When there is no heating demand and T≥T0, shut down the heating circuit (2) and activate the cooling circuit (1) for independent heat dissipation. When there is a heating demand and T < T0, the cooling circuit (1) is closed and the warm air circuit (2) is activated for independent heating. When there is a heating demand and T0≤T<T1, the heating circuit (2) and cooling circuit (1) are activated, and the waste heat of the smart headlight (103) is transferred to the heating circuit (2) through the heat exchanger (3). When there is a heating demand and T≥T1, the heating circuit (2) and cooling circuit (1) are activated, and the waste heat of the smart headlight (103) is transferred to the heating circuit (2) through the heat exchanger (3), while the radiator (107) is activated to force heat dissipation. Where T0 and T1 are both set thresholds, and T1 > T0.

8. The waste heat recovery control method according to claim 7, characterized in that: The activation of the cooling circuit (1) for independent heat dissipation includes: controlling the first three-way proportional valve (104) to connect port one and port two, and starting the first electronic water pump (102) and the radiator (107). The activation of the independent heating circuit (2) includes: controlling the second three-way proportional valve (205) to connect port one and port two, and starting the second electronic water pump (203) and PTC water heater to operate at high power; The dual-loop control when T0≤T<T1 includes: controlling the first three-way proportional valve (104) to connect port one and port three, and starting the first electronic water pump (102); at the same time, controlling the second three-way proportional valve (205) to connect port one and port three, and starting the second electronic water pump (203) and the PTC water heater to operate at low power. The dual-loop control when T≥T1 includes: controlling the first three-way proportional valve (104) to connect port one and port two and port one and port three according to a preset ratio, and simultaneously starting the first electronic water pump (102) and the radiator (107); controlling the second three-way proportional valve (205) to connect port one and port three, starting the second electronic water pump (203), and turning off the PTC water heater.

9. The waste heat recovery control method according to claim 8, characterized in that: When the heating circuit (2) is activated for independent heating and the temperature inside the passenger compartment is higher than the set threshold T2, the PTC water heater is stopped. When the temperature inside the passenger compartment is lower than the set threshold T2, heating continues according to the original control method. When a dual-loop control is used when T0≤T<T1 and the temperature inside the passenger compartment is higher than the set threshold T2, the first three-way proportional valve (104) is controlled to connect port one and port two, and the radiator (107) is started, and / or the second three-way proportional valve (205) is controlled to connect port one and port two; when the temperature inside the passenger compartment is lower than the set threshold T2, heating continues according to the original control method. When a dual-loop control is used when T≥T1 and the temperature inside the passenger compartment is higher than the set threshold T2, the flow ratio of port one and port two of the first three-way proportional valve (104) is increased, and the speed of the electric fan of the radiator (107) is increased, and / or the second three-way proportional valve (205) is connected to port one and port two; when the temperature inside the passenger compartment is lower than the set threshold T2, heating continues according to the original control method.

10. A vehicle, characterized in that, Equipped with a waste heat recovery system as described in any one of claims 1-6 and / or implementing a control method as described in any one of claims 7-9.

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