Radar heat dissipation structure, radar and vehicle

Abstract

The invention provides a radar heat dissipation structure, a radar and a vehicle. Comprising a heat dissipation substrate, a first side of which in a first direction is suitable for being directly or indirectly connected to a radar heating part; the wind scooper is arranged around the periphery of the heat dissipation substrate and is used for guiding airflow; a first air opening is formed in the first end, in the second direction, of the heat dissipation substrate and / or the air guide cover so that airflow can enter the area of the second side of the heat dissipation substrate, and the second side is the opposite side of the first side; the wind shield is connected to the side, opposite to the first air opening, of the wind scooper so that airflow can flow towards the second end in the second direction. According to the technical scheme, airflow is forcibly guided from the windward side of radar sealing to the leeward side of radar heat dissipation, and the heat dissipation efficiency is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of radar heat dissipation, and in particular to a radar heat dissipation structure, a radar, and a vehicle. Background Art

[0002] Automotive radar is a common sensor used in advanced driver assistance systems. Its detection range and accuracy are crucial to the comfort and safety of intelligent driving. Improving the measurement accuracy of automotive radars increases radar power consumption and internal chip temperature. According to the Arrhenius equation, every 10°C increase in chip temperature halves its operating lifespan. Higher operating temperatures also lead to decreased chip performance. Therefore, efficient heat dissipation structures are crucial to the development of automotive radars.

[0003] To protect the radar's internal PCB and components from dust, moisture, and other factors, the radar body must be well sealed, and no metal objects directly in front of the chip can interfere with the signal. Traditional automotive radar heat dissipation methods typically use a thermally conductive element directly attached to the heat source on the PCB on the leeward side of the radar. This conducts heat to the bottom housing, where it is dissipated to the environment through natural convection or radiation, resulting in low heat dissipation efficiency. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a radar heat dissipation structure that can dissipate heat efficiently.

[0005] The present application further proposes a radar and a vehicle.

[0006] In a first aspect, a radar heat dissipation structure is proposed, comprising: a heat dissipation substrate, wherein the first side in a first direction is suitable for being directly or indirectly connected to a radar heating part; an air guide cover, which is arranged around the periphery of the heat dissipation substrate and is used to guide the airflow; the heat dissipation substrate and / or the air guide cover are provided with a first air outlet at a first end in a second direction so that the airflow enters the area on the second side of the heat dissipation substrate, and the second side is the opposite side of the first side; and a wind shield, which is connected to a side of the air guide cover relative to the first air outlet so that the airflow flows toward the second end in the second direction.

[0007] The above technical solution, through the air guide, wind shield, and air vents provided on the heat dissipation substrate and / or the first end of the air guide in the second direction, allows airflow from the windward side of the radar to pass through the air vents and enter the leeward heat dissipation side of the radar, then flow in the second direction, thereby removing heat absorbed by the heat dissipation substrate. Compared to the existing technology that uses natural convection or thermal radiation to dissipate heat to the environment, this technical solution forcibly guides airflow from the windward side of the radar seal to the leeward side of the radar heat dissipation, greatly improving heat dissipation efficiency.

[0008] Optionally, the heat dissipation substrate has a plurality of heat dissipation fins arranged at intervals on the second side, and the heat dissipation fins protrude from the heat dissipation substrate.

[0009] Optionally, the plurality of heat dissipation fins are arranged at intervals to form an air passage connected in the second direction, so that the airflow flows toward the second end in the second direction.

[0010] Optionally, the wind shield extends from the first end to the second end to cover a portion of the heat dissipation fins.

[0011] Optionally, the heat dissipation substrate and / or the air guide cover is provided with a second air outlet at the second end in the second direction, so that the airflow passing through the second air outlet drives the hot air flow from the first end to the second end along the first direction away from the second side of the heat dissipation substrate.

[0012] Optionally, the ventilation area of the first air outlet is greater than the ventilation area of the second air outlet.

[0013] Optionally, the heat dissipation substrate and the air guide cover are integrally formed.

[0014] Optionally, the radar heat dissipation structure further includes a thermal interface material layer, and the thermal interface material layer is coated on the first side of the heat dissipation substrate.

[0015] Optionally, the radar heat dissipation structure further includes a heat spreading portion, one side of which is bonded to the first side of the heat dissipation substrate by coating the thermal interface material layer, and the other side of which is suitable for bonding to the radar heating portion by coating the thermal interface material layer.

[0016] Optionally, the radar heat dissipation structure also includes a refrigeration part and a heat equalizing part; the hot end of the refrigeration part is adhered to the first side of the heat dissipation substrate by coating the thermal interface material layer, and the other side is adhered to one side of the heat equalizing part by coating the thermal interface material layer, and the other side of the heat equalizing part is suitable for adhering to the radar heating part by coating the thermal interface material layer.

[0017] Secondly, a radar is provided, including the radar heat dissipation structure described above. This radar has high heat dissipation efficiency, thereby lowering the operating temperature of the radar chip, extending the radar's service life, and improving its reliability.

[0018] Thirdly, a vehicle is provided, including the aforementioned radar heat dissipation structure or the aforementioned radar. Due to the radar heat dissipation structure's efficient heat dissipation, the radar has a longer service life and higher reliability, thereby enhancing the comfort and safety of intelligent driving in the vehicle.

[0019] Optionally, the windshield is connected to the head of the vehicle, and the first side of the heat dissipation substrate in the first direction faces the driving direction of the vehicle.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is an exploded diagram of a radar according to a first embodiment of the present application;

[0023] Figure 2 This is a front view of a radar according to a first embodiment of the present application;

[0024] Figure 3 for Figure 2 AA cross-section of

[0025] Figure 4 for Figure 2 BB cross-section diagram;

[0026] Figure 5 is an exploded diagram of a radar according to a second embodiment of the present application;

[0027] Figure 6 is an exploded diagram of a radar according to a third embodiment of the present application;

[0028] Figure 7 Schematic diagram of a vehicle according to an embodiment of the present application.

[0029] Reference numerals:

[0030] Radar heating unit 1; thermal interface material layer 2; heat dissipation substrate 3; wind guide cover 4; wind shield 5; radar housing 6; heat equalization unit 8; cooling unit 9;

[0031] First side 31; boss 311; connecting column 312; second side 32; heat dissipation fin 33;

[0032] First air outlet 71; air duct 72; second air outlet 73;

[0033] Circuit board 11; radar chip 111; heating element 112;

[0034] First direction X; second direction Z; first end Z1; second end Z2; cold air flow C; hot air flow H;

[0035] Radar 100; vehicle 1000. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limiting the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0039] The following is a detailed description of the embodiments of the present application in conjunction with the accompanying drawings. Figure 1-4 The radar heat dissipation structure of an embodiment of the present application includes: a heat dissipation substrate 3, a first side 31 of which is suitable for being directly or indirectly connected to the radar heating part 1 in the first direction X; an air guide cover 4, which is arranged around the outer periphery of the heat dissipation substrate 3 and is used to guide the airflow; the heat dissipation substrate 3 and / or the air guide cover 4 are provided with a first air outlet 71 at the first end Z1 in the second direction Z, so that the airflow enters the area of the second side 32 of the heat dissipation substrate 3, and the second side 32 is the opposite side of the first side 31; a wind shield 5, which is connected to the side of the air guide cover 4 opposite to the first air outlet 71, so that the airflow flows toward the second end Z2 in the second direction Z.

[0040] The above technical solution, through the air guide, wind shield, and air vents provided on the heat dissipation substrate and / or the first end of the air guide in the second direction, allows airflow from the windward side of the radar to enter the leeward heat dissipation side of the radar through the air vents, then flow in the second direction, thereby removing heat absorbed by the heat dissipation substrate. Compared to the existing technology that uses natural convection or thermal radiation to dissipate heat to the environment, this technical solution forcibly guides airflow from the windward side of the radar seal to the leeward side of the radar heat dissipation, greatly improving heat dissipation efficiency.

[0041] The first direction X is the airflow direction, and the second direction Z may be the gravity direction.

[0042] See also Figure 1 In the embodiment of the present application, the heat sink 3 has a plurality of spaced-apart heat sink fins 33 on its second side 32. The heat sink fins 33 protrude from the heat sink 3. The heat sink fins 33 increase the heat dissipation area of the heat sink, significantly improving heat dissipation efficiency. Typically, the heat sink fins 33 and the heat sink 3 are integrally formed, perhaps through die-casting, CNC machining, or other methods. Alternatively, they can be separately machined and then connected by welding or other methods. The heat sink fins 33 and the heat sink 3 can be made of metal or alloys, such as copper, aluminum alloy, or magnesium alloy.

[0043] Further, see Figure 3 and Figure 4 The plurality of heat dissipation fins 33 are arranged at intervals to form an air channel 72 connected in the second direction, so that the airflow flows toward the second end Z2 in the second direction Z. In this way, the airflow can flow through each heat dissipation fin 33, and the heat dissipation efficiency is higher.

[0044] In the embodiment of the present application, the windshield 5 extends from the first end Z1 to the second end Z2 to cover a portion of the heat dissipation fins 33. This allows the portion of the hot air flow H that passes through the heat dissipation fins 33 near the first end Z1 to quickly move away from the heat dissipation substrate 3, preventing the hot air flow H from remaining between the heat dissipation substrate and the windshield for a long time, thereby improving heat dissipation efficiency.

[0045] In the embodiment of the present application, the heat dissipation substrate 3 and / or the air guide 4 are provided with a second air outlet 73 at the second end Z2 in the second direction Z. Airflow passing through the second air outlet drives the hot air flow from the first end Z1 to the second end Z2 along the first direction away from the second side of the heat dissipation substrate. This also allows the hot air flow H to move away from the heat dissipation substrate 3 as quickly as possible, thereby improving heat dissipation efficiency.

[0046] Furthermore, the ventilation area of the first air outlet 71 is larger than that of the second air outlet 73. This allows more air to flow in from the first end Z1 first to remove heat. At the same time, the smaller second air outlet 73 has a faster wind speed on the leeward side of the second end Z2, forming a low-pressure area. Under the action of the pressure difference, the flow rate of the air from the first end Z1 to the second end Z2 can be accelerated, thereby improving the heat dissipation efficiency. Figure 4 and Figure 5 The first air outlet 71 is a long, narrow hole formed at the first end Z1 of the heat dissipation substrate 3, while the second air outlet 73 is a round hole formed at the second end Z2 of the heat dissipation substrate 3. The opening area of the long, narrow hole is larger than the opening area of the round hole. Of course, the opening shapes of the first and second air outlets 71, 73 can be circular, square, or irregular polygonal, etc., without limitation.

[0047] In the embodiment of the present application, the second end Z2 in the second direction Z is higher than the first end Z2 in the second direction Z. In this way, the hot air flow can spontaneously flow from the first end Z1 to the second end Z2 under the action of buoyancy, thereby improving heat dissipation efficiency.

[0048] In some embodiments, the heat dissipation substrate 3 and the air guide cover 4 can be integrally formed by die-casting, thereby increasing the heat dissipation area of the heat dissipation substrate 3 and improving the heat dissipation efficiency.

[0049] In the embodiment of the present application, the radar heat dissipation structure further includes a thermal interface material layer 2, which is applied to the first side 31 of the heat dissipation substrate 3. The thermal interface material layer 2 is primarily used to fill the air gap between the heat generating portion and the heat dissipation substrate 3, accommodating design and manufacturing tolerances, reducing the impact of contact thermal resistance on heat transfer, and improving heat transfer efficiency. The thermal interface material layer 2 can be a thermal pad, thermal gel, thermal grease, graphite sheet, etc.

[0050] Please note that Figure 3 and Figure 4 The circuit board 11 is usually the main radar heating part 1, and the radar chip 111 is the concentrated heating area of the circuit board 11. Of course, there are some other heating elements 112. The first side 31 of the heat dissipation substrate 3 can be provided with a corresponding boss 311 according to the position of the heating area and the height of the heating element 112 protruding from the circuit board 11, so that the heat dissipation substrate 3 and the radar heating part 1 have a suitable gap, which is used to apply a thermal interface material layer 2 of suitable thickness, so as to be more conducive to heat dissipation. In addition, the heat dissipation substrate 3 and the circuit board 11 are connected and fixed in position by fasteners to ensure the stability of heat transfer; the fasteners can be screws, bolts, rivets, etc. In this embodiment, a connecting column 312 is provided on the heat dissipation substrate 3, and the heat dissipation substrate 3 and the circuit board 11 are connected and fixed by screws.

[0051] In the second embodiment of this application, please refer to Figure 5The radar heat dissipation structure also includes a heat spreader 8. One side of the heat spreader 8 is bonded to the first side 31 of the heat dissipation substrate 3 through the coated thermal interface material layer 2, and the other side is coated with the thermal interface material layer 2, which is suitable for bonding to the radar heating part 1. The heat spreader 8 can quickly diffuse the heat of the radar heating part 1, expand the contact area of heat dissipation, and thus improve the heat dissipation efficiency. The heat spreader 8 can be a copper plate, a VC (vapor chamber) heat spreader, a graphite sheet, etc. Among them, the VC heat spreader uses the principle of internal working fluid vaporization to quickly diffuse local heat to the entire heat spreader and transmit it to the heat dissipation substrate, thereby improving the heat dissipation efficiency. It is particularly suitable for being arranged between a radar chip with a large heat flux density and a heat dissipation substrate. The other structures of the second embodiment are the same as those of the first embodiment mentioned above, and will not be repeated here.

[0052] In the third embodiment of this application, please refer to Figure 6 The radar heat dissipation structure also includes a cooling unit 9 and a heat-sinking unit 8. The hot end of the cooling unit 9 is bonded to the first side of the heat dissipation substrate via a thermal interface material layer 2, while the cold end is bonded to one side of the heat-sinking unit 8 via a thermal interface material layer 2. The other side of the heat-sinking unit 8 is also bonded to the radar heating unit 1 via a thermal interface material layer 2. Active cooling further improves heat dissipation efficiency. The cooling unit can be a TEC (Thermoelectric Cooler) semiconductor refrigeration chip.

[0053] This application proposes a radar 100 that includes the aforementioned radar heat dissipation structure. This radar has high heat dissipation efficiency, resulting in lower operating temperatures for heat-generating components such as the radar chip, a longer radar lifespan, and higher reliability. Furthermore, while maintaining the same thermal power consumption, the radar components can be reduced in size, resulting in a more compact structure and a lighter product. The radar can be a millimeter-wave radar, an ultrasonic radar, a lidar, or the like. Radar 100 includes a radar housing 6, which is used to seal and protect the radar body, circuit board, and key components from dust and moisture. In this embodiment, the radar housing 6 is hermetically connected to the heat dissipation substrate 3. The housing 6 can be made of materials such as plastic and glass.

[0054] See also Figure 7 This application proposes a vehicle 1000, including the aforementioned radar heat dissipation structure or radar 100. Due to the radar heat dissipation structure's efficient heat dissipation, the radar has a longer service life and higher reliability, thereby enhancing the comfort and safety of intelligent driving. Vehicle 1000 can be a fuel vehicle, electric vehicle, hybrid vehicle, or other energy source.

[0055] The windshield 5 is connected to the front of the vehicle, with the first side 31 of the heat dissipation substrate 3 in the first direction X facing the vehicle's direction of travel. This allows for more airflow through the radar heat dissipation structure, resulting in higher heat dissipation efficiency. Of course, depending on the vehicle's design, the radar 100 can also be installed on the top, middle, or rear of the vehicle 1000.

[0056] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0057] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A radar heat dissipation structure, characterized in that: include: A heat dissipation substrate (3), wherein a first side (31) in a first direction (X) is suitable for being directly or indirectly connected to a radar heating portion (1); An air guide cover (4) is arranged around the outer periphery of the heat dissipation substrate (3) and is used to guide airflow; The heat dissipation substrate (3) and / or the air guide cover (4) is provided with a first air outlet (71) at a first end (Z1) in a second direction (Z) so as to allow airflow to enter an area of a second side (32) of the heat dissipation substrate (3), the second side (32) being an opposite side to the first side (31); A wind shield (5) is connected to a side of the wind guide cover (4) relative to the first air outlet (71) to allow the airflow to flow toward the second end (Z2) of the second direction (Z).

2. The radar heat dissipation structure according to claim 1, characterized in that: The heat dissipation substrate (3) has a plurality of heat dissipation fins (33) arranged at intervals on the second side (32), and the heat dissipation fins (33) protrude from the heat dissipation substrate (3).

3. The radar heat dissipation structure according to claim 2, characterized in that: The plurality of heat dissipation fins (33) are arranged at intervals to form an air channel (72) connected in the second direction (Z), so that the air flow flows along the air channel (72) toward the second end (Z2) in the second direction (Z).

4. The radar heat dissipation structure according to claim 3, characterized in that: The windshield (5) extends from the first end (Z1) to the second end (Z2) to cover a portion of the heat dissipation fins (33).

5. The radar heat dissipation structure according to claim 4, characterized in that: The heat dissipation substrate (3) and / or the air guide cover (4) are provided with a second air outlet (73) at the second end (Z2) in the second direction (Z), so that the airflow passing through the second air outlet (73) drives the hot air flow flowing from the first end (Z1) to the second end (Z2) along the first direction (X) away from the second side (32) of the heat dissipation substrate (3).

6. The radar heat dissipation structure according to claim 5, characterized in that: The ventilation area of the first air outlet (71) is greater than the ventilation area of the second air outlet (73).

7. The vehicle according to claim 1, wherein: The second end (Z2) of the second direction (Z) is higher than the first end (Z1) of the second direction (Z).

8. The radar heat dissipation structure according to claim 1, characterized in that: The heat dissipation substrate (3) and the air guide cover (4) are integrally formed.

9. The radar heat dissipation structure according to any one of claims 1 to 8, characterized in that: The radar heat dissipation structure further comprises a thermal interface material layer (2), which is coated on the first side of the heat dissipation substrate.

10. The radar heat dissipation structure according to claim 9, characterized in that: The radar heat dissipation structure further comprises a heat-equalizing portion, one side of which is bonded to the first side of the heat dissipation substrate by being coated with the thermal interface material layer (2), and the other side of which is suitable for being bonded to the radar heating portion by being coated with the thermal interface material layer (2).

11. The radar heat dissipation structure according to claim 9, characterized in that: The radar heat dissipation structure also includes a refrigeration part and a heat-equalizing part; the hot end of the refrigeration part is bonded to the first side of the heat dissipation substrate by coating the thermal interface material layer (2), and the other side is bonded to one side of the heat-equalizing part by coating the thermal interface material layer (2); the other side of the heat-equalizing part is suitable for bonding to the radar heating part by coating the thermal interface material layer (2).

12. A radar (100), characterized in that: The radar heat dissipation structure comprises the radar heat dissipation structure according to any one of claims 1 to 11.

13. A vehicle (1000), characterized in that The radar comprises the radar heat dissipation structure according to any one of claims 1 to 11 or the radar (100) according to claim 12.

14. The vehicle according to claim 13, characterized in that The windshield (5) is connected to the head of the vehicle, and the first side (31) of the heat dissipation substrate (3) in the first direction (X) faces the driving direction of the vehicle.

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