A vehicle-mounted millimeter wave radar integrated light group heat dissipation structure and heat dissipation method

Abstract

The present invention discloses a heat dissipation structure and heat dissipation method of a vehicle-mounted millimeter-wave radar integrated lamp group, the heat dissipation structure includes a lamp, the inner cavity of the lamp is provided with a first working compartment, a second working compartment and a third working compartment; both inner and outer sides of the first partition provided between the first working compartment and the second working compartment are paved with a heat insulation layer or sprayed with a heat insulation material, so that the first partition becomes an isolation plate for blocking the heat transfer of the first working compartment; a lamp unit for vehicle lighting is provided in the first working compartment; a millimeter-wave radar module and a liquid cooling block are provided in the second working compartment, and the liquid cooling block is installed on the millimeter-wave radar module; a liquid cooling box is provided in the third working compartment; a liquid cooling water pipe is installed on the liquid cooling block, and the other end of the liquid cooling water pipe passes through the second partition provided between the second working compartment and the third working compartment and is connected to the liquid cooling box. The heat dissipation effect of the present invention is remarkable, and the service life of the vehicle-mounted millimeter-wave radar integrated lamp group is extended.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted millimeter-wave radars, and in particular to a heat dissipation structure and a heat dissipation method of a vehicle-mounted millimeter-wave radar integrated lamp group. Background Art

[0002] In the prior art, in order to improve the design freedom of vehicle lamps equipped with radars and to improve the reliability of radar data obtained by the radars, the vehicle-mounted millimeter-wave radars are moved directly from the original installation position in the vehicle bumper to the vehicle lamp cover, thereby improving the integration of the vehicle lamps and simplifying the structure of the millimeter-wave radar module. At the same time, no heat dissipation method for the millimeter-wave radar module in the lamp has been found.

[0003] Although the existing technology integrates the millimeter-wave radar module inside the car light, simplifying the radar structure while improving the integration of the car light, the current solution is to install the millimeter-wave radar module directly in the car light cover. Given that the operating temperature inside the lampshade exceeds 100 degrees Celsius under extreme working conditions, not only will the reliability and durability of the millimeter-wave radar module be affected, but the temperature rise will also affect the dielectric constant of the circuit board and the antenna cover, causing frequency deviation in the antenna's operating frequency band and deteriorating the antenna's operating performance.

[0004] It can be seen that the existing millimeter wave radar module for headlights has the following main problems:

[0005] 1. The maximum temperature of the lighting unit during operation will exceed 100 degrees Celsius, which can easily transfer heat to other components in the same closed lampshade, deteriorating the working environment of other components;

[0006] Second, due to the serious heat generation of the lighting structure of the vehicle headlights, the working environment of the millimeter-wave radar in the same closed lampshade as the lighting unit will deteriorate after being heated. In addition, the module itself will have heat generation and heat dissipation problems in a closed environment, which will affect the reliability and durability of the millimeter-wave radar module.

[0007] 3. When the operating temperature of the millimeter-wave radar module continues to rise, the dielectric constant of the PCB board and the antenna cover in the radar module will change, causing the antenna's operating frequency band to shift and deteriorating the antenna's operating performance. Summary of the invention

[0008] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0009] To this end, the present invention proposes a heat dissipation structure and a heat dissipation method for an on-board millimeter-wave radar integrated light group, which has a significant heat dissipation effect and prolongs the service life of the on-board millimeter-wave radar integrated light group.

[0010] According to the heat dissipation method of the vehicle-mounted millimeter-wave radar integrated light group of an embodiment of the present invention, the temperature sensor built into the liquid cooling block monitors the temperature of the cold head in real time, and determines whether the temperature t detected by the temperature sensor is within the threshold TH range; when the temperature t detected by the temperature sensor is lower than the threshold TH, the liquid cooling system does not work; when the temperature t detected by the temperature sensor is not lower than the threshold TH, the liquid cooling system works.

[0011] The beneficial effects of the present invention are as follows: (1) inside the lampshade, separate working cabins are set up for the lighting unit and the millimeter-wave radar module, which blocks the heat propagation in space and can effectively reduce the heat transferred from the lighting unit to the working environment of the millimeter-wave radar; (2) an isolation plate is set between the separate working cabins of the lighting unit and the millimeter-wave radar module, and heat insulation materials or heat insulation coatings are attached to both sides of the isolation plate to further reduce the heat transfer of the lighting unit; (3) for part of the heat transferred from the lighting unit plus the heat generated by the millimeter-wave radar itself, the millimeter-wave radar module is cooled by an integrated liquid-cooled heat dissipation device. This method is not only more effective than traditional heat dissipation fins, but also more suitable for scenes such as lampshades that require a closed working environment than air-cooled heat dissipation devices that require heat dissipation in an open space.

[0012] According to one embodiment of the present invention, the value range of the threshold TH is 40 degrees Celsius ≤ threshold TH ≤ 80 degrees Celsius; when the temperature t detected by the temperature sensor is lower than 40 degrees Celsius, that is, when the temperature t is less than 40 degrees Celsius, the liquid cooling system does not work; when the temperature t detected by the temperature sensor is between 40 degrees Celsius and 60 degrees Celsius, that is, when 40 degrees Celsius ≤ temperature t < 60 degrees Celsius, the liquid cooling system is powered on, the water pump is started, the cooling fins are involved in heat dissipation, and the fan does not run; when the temperature t detected by the temperature sensor is between 60 degrees Celsius and 80 degrees Celsius, that is, when 60 degrees Celsius ≤ temperature t < 80 degrees Celsius, the liquid cooling system is powered on, the water pump is started, the cooling fins are involved in heat dissipation, and the fan runs in the first gear; when the temperature t detected by the temperature sensor is higher than or equal to 80 degrees Celsius, that is, when the temperature t is greater than or equal to 80 degrees Celsius, the liquid cooling system is powered on, the water pump is started, the cooling fins are involved in heat dissipation, and the fan runs in the second gear.

[0013] According to one embodiment of the present invention, the liquid cooling system includes a millimeter wave radar module, a liquid cooling block and a liquid cooling box. The heat generated by the millimeter wave radar module and the heat absorbed from the environment are directly transferred to the liquid cooling block. The heated coolant in the liquid cooling block and the coolant after heat dissipation in the liquid cooling box circulate.

[0014] The present invention also provides a vehicle-mounted millimeter-wave radar integrated lamp group heat dissipation structure for realizing a vehicle-mounted millimeter-wave radar integrated lamp group heat dissipation method, comprising a lamp, wherein a first working compartment, a second working compartment and a third working compartment are arranged in an inner cavity of the lamp; a first partition is arranged between the first working compartment and the second working compartment; a second partition is arranged between the second working compartment and the third working compartment; a third partition is arranged between the first working compartment and the third working compartment; and inner and outer sides of the first partition arranged between the first working compartment and the second working compartment are Both sides are paved with insulation layers or sprayed with insulation materials, so that the first partition becomes an isolation plate for blocking heat transfer from the first working cabin; the first working cabin is provided with a lamp unit for vehicle lighting; the second working cabin is provided with a millimeter-wave radar module and a liquid cooling block, and the liquid cooling block is installed on the millimeter-wave radar module; the third working cabin is provided with a liquid cooling box; the liquid cooling block is installed with a liquid cooling water pipe, and the other end of the liquid cooling water pipe passes through the second partition arranged between the second working cabin and the third working cabin and is connected to the liquid cooling box.

[0015] According to an embodiment of the present invention, the lamp unit is divided into a first lamp unit and a second lamp unit.

[0016] According to one embodiment of the present invention, the millimeter wave radar module is fixed to the second partition plate by a bracket.

[0017] According to an embodiment of the present invention, a water pipe through hole for passing a liquid cooling water pipe is opened on the second partition plate, and a first sealing rubber ring is arranged in the water pipe through hole.

[0018] According to one embodiment of the present invention, the liquid cooling block is installed on the back of the millimeter-wave radar module; the liquid cooling block includes a cold head, an outer shell, a second sealing rubber ring and a temperature sensor, the cold head is arranged at the front end of the outer shell, the second sealing rubber ring is arranged in the water pipe through hole at the rear end of the outer shell, and the cold head is located at one end close to the millimeter-wave radar module, the outer shell is filled with a first coolant, a micro-water channel is installed at the front end of the inner cavity of the outer shell, and a water pump is installed at the rear end of the inner cavity of the outer shell, and the temperature sensor is located between the cold head and the outer shell.

[0019] According to one embodiment of the present invention, the liquid cooling box body includes a water tank, cooling fins and a fan, the water tank is filled with a second coolant, the cooling fins are installed on the back of the water tank, the fan is installed on the back of the cooling fins, and a third sealed rubber ring is provided in the water pipe through hole at the front end of the water tank.

[0020] According to one embodiment of the present invention, the number of the liquid cooling water pipes is two, one end of the liquid cooling water pipe is connected to the outer shell, and the other end of the liquid cooling water pipe is connected to the water tank.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the heat dissipation structure of the vehicle-mounted millimeter wave radar integrated lamp group of the present invention;

[0025] Figure 2 It is a heat dissipation flow chart of the heat dissipation structure of the vehicle-mounted millimeter wave radar integrated lamp group of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the liquid cooling block in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the liquid cooling box in the present invention;

[0028] Figure 5 The present invention is a flow chart of the heat dissipation method of the vehicle-mounted millimeter wave radar integrated lamp group.

[0029] The numbers in the figure are: 1. Lamp; 2. First working cabin; 3. Second working cabin; 4. First lamp unit; 5. Second lamp unit; 6. First partition; 7. Millimeter-wave radar module; 8. Liquid cooling block; 9. Liquid cooling box; 10. Third working cabin; 11. Liquid cooling water pipe; 12. Second partition; 13. Third partition; 14. Bracket; 15. First sealing rubber ring; 80. Cold head; 81. Outer shell; 82. Micro water channel; 83. Water pump; 84. First coolant; 85. Second sealing rubber ring; 86. Temperature sensor; 90. Water tank; 91. Heat sink fins; 92. Fan; 93. Third sealing rubber ring; 94. Second coolant. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms “one side”, “the other side”, “both sides”, “between”, “middle”, “upper end”, “lower end”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The heat dissipation structure and heat dissipation method of the vehicle-mounted millimeter-wave radar integrated light group according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] See Figure 5 A method for dissipating heat of an integrated lamp group of a vehicle-mounted millimeter-wave radar, wherein a temperature sensor 86 built into a liquid cooling block 8 monitors the temperature of a cold head 80 in real time, and determines whether the temperature t detected by the temperature sensor 86 is within a threshold TH range; when the temperature t detected by the temperature sensor 86 is lower than the threshold TH, the liquid cooling system does not work; when the temperature t detected by the temperature sensor 86 is not lower than the threshold TH, the liquid cooling system works.

[0035] The value range of the threshold value TH is 40 degrees Celsius ≤ threshold value TH ≤ 80 degrees Celsius. The temperature t detected by the temperature sensor 86 will correspond to the following four modes, as follows:

[0036] Mode 1: When the temperature t detected by the temperature sensor 86 is lower than 40 degrees Celsius, that is, when the temperature t is less than 40 degrees Celsius, the liquid cooling system does not work.

[0037] Mode 2: When the temperature t detected by the temperature sensor 86 is between 40 degrees Celsius and 60 degrees Celsius, that is, when 40 degrees Celsius ≤ temperature t<60 degrees Celsius, the liquid cooling system is powered on, the water pump 83 is started, the cooling fins 91 participate in heat dissipation, and the fan 92 does not run.

[0038] Mode three: When the temperature t detected by the temperature sensor 86 is between 60 degrees Celsius and 80 degrees Celsius, that is, when 60 degrees Celsius ≤ temperature t<80 degrees Celsius, the liquid cooling system is powered on, the water pump 83 is started, the cooling fins 91 participate in heat dissipation, and the fan 92 operates in the first gear.

[0039] Mode 4: When the temperature t detected by the temperature sensor 86 is higher than or equal to 80 degrees Celsius, that is, when the temperature t≥80 degrees Celsius, the liquid cooling system is powered on, the water pump 83 is started, the cooling fins 91 participate in heat dissipation, and the fan 92 operates in the second gear.

[0040] The liquid cooling system includes a millimeter wave radar module 7, a liquid cooling block 8 and a liquid cooling box 9. The heat generated by the millimeter wave radar module 7 and the heat absorbed from the environment are directly transferred to the liquid cooling block 8. The heated coolant in the liquid cooling block 8 and the coolant after heat dissipation in the liquid cooling box 9 circulate.

[0041] The present invention also provides a vehicle-mounted millimeter-wave radar integrated lamp group heat dissipation structure for realizing a vehicle-mounted millimeter-wave radar integrated lamp group heat dissipation method, comprising a lamp 1, wherein a first working compartment 2, a second working compartment 3 and a third working compartment 10 are arranged in the inner cavity of the lamp 1; a first partition 6 is arranged between the first working compartment 2 and the second working compartment 3; a second partition 12 is arranged between the second working compartment 3 and the third working compartment 10; a third partition 13 is arranged between the first working compartment 2 and the third working compartment 10; the inner and outer portions of the first partition 6 arranged between the first working compartment 2 and the second working compartment 3 are Both sides are paved with insulation layers or sprayed with insulation materials, so that the first partition 6 becomes an isolation plate that blocks heat transfer from the first working cabin 2; a lamp unit for vehicle lighting is arranged in the first working cabin 2; a millimeter-wave radar module 7 and a liquid cooling block 8 are arranged in the second working cabin 3, and the liquid cooling block 8 is installed on the millimeter-wave radar module 7; a liquid cooling box 9 is arranged in the third working cabin 10; a liquid cooling water pipe 11 is installed on the liquid cooling block 8, and the other end of the liquid cooling water pipe 11 passes through a second partition 12 arranged between the second working cabin 3 and the third working cabin 10 and is connected to the liquid cooling box 9.

[0042] The lamp unit is divided into a first lamp unit 4 and a second lamp unit 5; of course, it should be noted that the number of lamp units is not limited, and can be one, or two or more. The millimeter wave radar module 7 is fixed to the second partition 12 through a bracket 14. The second partition 12 is provided with a water pipe through hole for passing the liquid cooling water pipe 11, and a first sealing rubber ring 15 is provided in the water pipe through hole.

[0043] The liquid cooling block 8 is installed on the back of the millimeter wave radar module 7; the liquid cooling block 8 includes a cold head 80, an outer shell 81, a second sealing rubber ring 85 and a temperature sensor 86. The outer shell 81 is made of plastic material. The cold head 80 is arranged at the front end of the outer shell 81, and the second sealing rubber ring 85 is arranged in the water pipe through hole at the rear end of the outer shell 81. The cold head 80 is located at one end close to the millimeter wave radar module 7. The outer shell 81 is filled with a first coolant 84, and a micro-water channel 82 is installed at the front end of the inner cavity of the outer shell 81. A water pump 83 is installed at the rear end of the inner cavity of the outer shell 81. It should be noted that the temperature sensor 86 is located between the cold head 80 and the outer shell 81.

[0044] The liquid cooling box 9 includes a water tank 90, a heat sink fin 91 and a fan 92, wherein the fan 92 has two gears, namely, the first gear and the second gear. The water tank 90 is filled with a second coolant 94, the heat sink fin 91 is installed on the back of the water tank 90, the fan 92 is installed on the back of the heat sink fin 91, and a third sealed rubber ring 93 is provided in the water pipe through hole at the front end of the water tank 90.

[0045] There are two liquid cooling water pipes 11 , one end of which is connected to the outer shell 81 , and the other end of which is connected to the water tank 90 .

[0046] See Figure 1The vehicle lamp 1 can be a headlight or a taillight. The lamp 1 has three working compartments, namely the first working compartment 2, the second working compartment 3, and the third working compartment 10. The first working compartment 2 is the lighting unit working compartment, which contains the first lamp unit 4 and the second lamp unit 5. These lamp units are responsible for the lighting of the vehicle lamp. The second working compartment 3 is the working compartment of the millimeter-wave radar module 7, and it is also the heat-insulating compartment of the millimeter-wave radar module 7. There is a first partition 6 between the second working compartment 3 and the first working compartment 2. The inner and outer sides of the first partition 6 are paved with a heat-insulating layer or sprayed with heat-insulating materials to block the heat transfer of the first working compartment 2. The second working compartment 3 is equipped with a millimeter-wave radar module 7 and a liquid cooling block 8 as the main components. The millimeter-wave radar module 7 is fixed to the inner side wall of the lampshade of the second working compartment 3 by a bracket 14 on the premise of ensuring a preset angle with the vehicle lampshade. One side of the liquid cooling block 8 is fitted on the back of the millimeter wave radar module 7, and two liquid cooling water pipes 11 are installed on the other side. The liquid cooling water pipes 11 are connected to the liquid cooling box 9 in the working cabin 10 through the sealing rubber ring between the cabin body partitions of the second working cabin 3 and the third working cabin 10. The third working cabin 10 mainly has a liquid cooling box 9 inside. The side of the liquid cooling box 9 connected to the liquid cooling water pipe 11 is installed toward the second working cabin 3, which is convenient for connecting with the liquid cooling block 8 in the first working cabin 2. The other side of the liquid cooling box 9 is installed toward the open hole cabin wall side of the third working cabin 10, which is convenient for accelerating the internal and external air convection and accelerating the heat dissipation speed when the fan is turned on.

[0047] See Figure 2 , is a heat dissipation flow chart of an active liquid cooling system. The heat generated by the millimeter wave radar module 7 during operation and the heat absorbed from the environment are directly transferred to the liquid cooling block 8. The circulating first coolant 84 takes away the heat in the liquid cooling block 8 and flows through the water tank 90. ​​The heat dissipation fins 91 help the second coolant 94 in the water tank 90 to dissipate heat. When the fan 92 is in the start mode, it can further accelerate air convection to help the second coolant 94 dissipate heat. After the heat is dissipated in the water tank 90, the second coolant 94 continues to circulate into the liquid cooling block 8 to help the millimeter wave radar module 7 dissipate heat.

[0048] See Figure 3, is the internal structure diagram of the liquid cooling block 8, the liquid cooling block 8 has a cold head 80, an outer shell 81, a micro-water channel 82, a water pump 83, a first coolant 84 and a temperature sensor 86 as main components, wherein the bottom of the cold head 80 is made of copper, and the liquid cooling block 8 is connected to the liquid cooling box 9 through a second sealing rubber ring 85 and a liquid cooling water pipe 11. The cold head 80 is directly connected to the millimeter wave radar module 7, and most of the heat transferred by the radar is concentrated on the cold head 80. The micro-water channel 82 is directly connected to the cold head 80 and immersed in the first coolant 84. After the water pump 83 is started, it drives the internal first coolant 84 to exchange internal and external flows through the liquid cooling water pipe 11. The internal first coolant 84 flows through the micro-water channel 82 during the flow process. The micro-water channel 82 has a larger heat dissipation area than the cold head 80. The first coolant 84 quickly takes away the heat on the micro-water channel 82 during the flow, helping the micro-water channel 82 and the cold head 80 to cool down quickly, achieving a heat dissipation effect.

[0049] See Figure 4 , is the internal structure diagram of the liquid cooling box 9, which has a main structure including a water tank 90, a heat sink fin 91 and a fan 92, and is connected to the liquid cooling block 8 through a third sealed rubber ring 93 and a liquid cooling water pipe 11. The second coolant 94 in the water tank 90 is driven by the water pump 83 built into the liquid cooling block 8 to exchange flow with the first coolant 84, and the heated coolant flows into the water tank 90, while the heat sink fin 91 effectively transfers the heat inside the water tank 90 through the huge contact area with the air. When the fan 92 is turned on, the convection between the internal and external air can be accelerated to help further dissipate heat.

[0050] It should be noted that see Figure 1 It is also possible to dissipate heat by replacing the back of the millimeter-wave radar module 7 with a traditional heat sink fin, where the liquid cooling block 8 is installed, but the heat dissipation effect of this method is relatively limited.

[0051] A vehicle-mounted millimeter-wave radar integrated lamp group heat dissipation structure and heat dissipation method of the present invention integrates the millimeter-wave radar module 7 inside the lamp group, but installs the lighting unit and the millimeter-wave radar module 7 in an independent working compartment, that is, the millimeter-wave radar module 7 is installed in a heat-insulating compartment for work, which effectively blocks the heat source; a heat-insulating layer is laid or a heat-insulating material is sprayed on the baffle of the heat-insulating compartment and the lighting module where the millimeter-wave radar module 7 is installed, so as to further improve the heat-insulating effect of the heat-insulating compartment; for part of the heat transferred from the lighting unit plus the heat generated by the millimeter-wave radar itself, the millimeter-wave radar module 7 is dissipated through an integrated liquid-cooled heat dissipation device, which is not only more effective than traditional heat dissipation fins, but also more suitable for scenes such as lampshades that require a closed working environment than air-cooled heat dissipation devices that require external heat dissipation conditions.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat dissipation structure of an on-vehicle millimeter-wave radar integrated light group, characterized in that: Comprising a lamp (1), wherein a first working chamber (2), a second working chamber (3) and a third working chamber (10) are arranged in an inner cavity of the lamp (1); A first partition plate (6) is provided between the first working compartment (2) and the second working compartment (3); A second partition plate (12) is provided between the second working compartment (3) and the third working compartment (10); A third partition plate (13) is provided between the first working compartment (2) and the third working compartment (10); The first partition (6) disposed between the first working cabin (2) and the second working cabin (3) is provided with a heat insulation layer or a heat insulation material sprayed on both inner and outer sides thereof, so that the first partition (6) becomes an isolation plate for blocking heat transfer from the first working cabin (2); A lamp unit for vehicle lighting is arranged in the first working cabin (2); A millimeter wave radar module (7) and a liquid cooling block (8) are arranged in the second working cabin (3), and the liquid cooling block (8) is mounted on the millimeter wave radar module (7); A liquid cooling box (9) is provided in the third working cabin (10); A liquid cooling water pipe (11) is installed on the liquid cooling block (8), and the other end of the liquid cooling water pipe (11) passes through a second partition (12) provided between the second working compartment (3) and the third working compartment (10) and is connected to the liquid cooling box (9); The liquid cooling block (8) is installed on the back of the millimeter wave radar module (7); the liquid cooling block (8) comprises a cold head (80), an outer shell (81), a second sealing rubber ring (85) and a temperature sensor (86); the cold head (80) is arranged at the front end of the outer shell (81); the second sealing rubber ring (85) is arranged in a water pipe through hole at the rear end of the outer shell (81); the cold head (80) is located at one end close to the millimeter wave radar module (7); the outer shell (81) is filled with a first cooling liquid (84); a micro-water channel (82) is installed at the front end of the inner cavity of the outer shell (81); a water pump (83) is installed at the rear end of the inner cavity of the outer shell (81); and the temperature sensor (86) is located between the cold head (80) and the outer shell (81); The liquid cooling box (9) comprises a water tank (90), heat dissipation fins (91) and a fan (92); the water tank (90) is filled with a second coolant (94); the heat dissipation fins (91) are mounted on the back of the water tank (90); the fan (92) is mounted on the back of the heat dissipation fins (91); and a third sealed rubber ring (93) is arranged in a water pipe through hole at the front end of the water tank (90).

2. The heat dissipation structure of the vehicle-mounted millimeter-wave radar integrated light group according to claim 1, characterized in that: The lamp unit is divided into a first lamp unit (4) and a second lamp unit (5).

3. The heat dissipation structure of the vehicle-mounted millimeter-wave radar integrated light group according to claim 1, characterized in that: The millimeter wave radar module (7) is fixed on the second partition plate (12) via a bracket (14).

4. The heat dissipation structure of the vehicle-mounted millimeter wave radar integrated light group according to claim 1, characterized in that: The second partition plate (12) is provided with a water pipe through hole for passing a liquid cooling water pipe (11), and a first sealing rubber ring (15) is provided in the water pipe through hole.

5. The heat dissipation structure of the vehicle-mounted millimeter wave radar integrated light group according to claim 1, characterized in that: There are two liquid cooling water pipes (11), one end of each of which is connected to the outer shell (81), and the other end of each of which is connected to the water tank (90).

6. A method for heat dissipation of an on-board millimeter-wave radar integrated lamp group of the on-board millimeter-wave radar integrated lamp group heat dissipation structure as claimed in claim 1, characterized in that: The temperature sensor (86) built into the liquid cooling block (8) monitors the temperature of the cold head (80) in real time, and determines whether the temperature t detected by the temperature sensor (86) is within a threshold value TH. When the temperature t detected by the temperature sensor (86) is lower than the threshold value TH, the liquid cooling system does not work. When the temperature t detected by the temperature sensor (86) is not lower than the threshold value TH, the liquid cooling system works.

7. The heat dissipation method of the vehicle-mounted millimeter wave radar integrated lamp group according to claim 6, characterized in that: The value range of the threshold TH is 40 degrees Celsius ≤ threshold TH ≤ 80 degrees Celsius; When the temperature t detected by the temperature sensor (86) is lower than 40 degrees Celsius, that is, when the temperature t is less than 40 degrees Celsius, the liquid cooling system does not work; When the temperature t detected by the temperature sensor (86) is between 40 degrees Celsius and 60 degrees Celsius, that is, when 40 degrees Celsius ≤ temperature t < 60 degrees Celsius, the liquid cooling system is powered on, the water pump (83) is started, the cooling fins (91) participate in heat dissipation, and the fan (92) does not operate; When the temperature t detected by the temperature sensor (86) is between 60 degrees Celsius and 80 degrees Celsius, that is, when 60 degrees Celsius ≤ temperature t < 80 degrees Celsius, the liquid cooling system is powered on, the water pump (83) is started, the cooling fins (91) participate in heat dissipation, and the fan (92) operates in the first gear; When the temperature t detected by the temperature sensor (86) is higher than or equal to 80 degrees Celsius, that is, when the temperature t≥80 degrees Celsius, the liquid cooling system is powered on, the water pump (83) is started, the cooling fins (91) participate in heat dissipation, and the fan (92) operates in the second gear.

8. The heat dissipation method of the vehicle-mounted millimeter wave radar integrated lamp assembly as claimed in claim 6, characterized in that: The liquid cooling system comprises a millimeter wave radar module (7), a liquid cooling block (8) and a liquid cooling box (9); the heat generated by the operation of the millimeter wave radar module (7) and the heat absorbed from the environment are directly transferred to the liquid cooling block (8); the heated coolant in the liquid cooling block (8) and the coolant after heat dissipation in the liquid cooling box (9) circulate.

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