Heat dissipation device and vehicle display system

Abstract

The utility model relates to a heat dissipation device and a vehicle display system, the heat dissipation device comprises a bearing part, a heat exchange tube and a light emitting device, the heat exchange tube is arranged on the bearing part, and a heat exchange medium is arranged in the heat exchange tube; the light-emitting device is arranged on the bearing piece and covers part of the heat exchange tube; wherein the heat dissipation device has a first state and a second state, in the first state, the light-emitting device is extinguished, and the heat exchange medium is static in the heat exchange tube; in the second state, the light-emitting device is lightened, the heat exchange medium covered by the light-emitting device absorbs heat and is converted from the liquid state to the gas state to form flowing, and the heat exchange medium flowing out of the light-emitting device releases heat and is converted from the gas state to the liquid state to form flowing. The embodiment of the utility model provides a heat dissipation device and a vehicle display system, which can improve the heat dissipation capability of a light-emitting device and improve the overall heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a heat dissipation device and a vehicle display system. Background Art

[0002] In automotive head-up display (HUD) products, the common design structure is a combination of red, green and blue lamp beads. The display brightness requirements under different ambient light conditions are achieved by adjusting the brightness combination to complete the image display function.

[0003] Head-up display products are usually placed in front of the car instrument panel. In the case of summer sun exposure, the ambient temperature around the light source is very high, so effective heat dissipation is extremely important. The common heat dissipation solution is to use a metal shell, coat it with an interface material with high thermal conductivity to allow the heat of the LED to be extracted from the shell, and use heat dissipation structures such as fins to enhance natural heat dissipation, so that the device can operate within the allowable temperature range.

[0004] However, the above heat dissipation solutions have low heat dissipation capacity and are difficult to meet the heat dissipation requirements of high-power LEDs. At the same time, due to layout restrictions, it is difficult to integrate active heat dissipation solutions such as air cooling and water cooling, which are highly efficient but have many additional components. Utility Model Content

[0005] The embodiments of the utility model provide a heat dissipation device and a vehicle display system, which can improve the heat dissipation capacity of the light-emitting device and improve the overall heat dissipation effect.

[0006] On the one hand, according to an embodiment of the utility model, a heat dissipation device is proposed, including a carrier, a heat exchange tube and a light-emitting device, wherein the heat exchange tube is arranged on the carrier, and a heat exchange medium is arranged in the heat exchange tube; the light-emitting device is arranged on the carrier and covers a portion of the heat exchange tube; wherein the heat dissipation device has a first state and a second state, in the first state, the light-emitting device is extinguished, and the heat exchange medium is stationary in the heat exchange tube; in the second state, the light-emitting device is lit, and the heat exchange medium covered by the light-emitting device absorbs heat and is converted from liquid to gas to form a flow, and the heat exchange medium flowing out of the light-emitting device releases heat and is converted from gas to liquid to form a flow.

[0007] According to one aspect of an embodiment of the utility model, the heat exchange tube includes a heat exchange area, the heat exchange area includes a first tube segment, a second tube segment and a bent tube segment connected therebetween, the light-emitting device covers at least one of the first tube segment and the second tube segment, and in the second state, the heat exchange medium in the first tube segment flows along a first direction and the heat exchange medium in the second tube segment flows along a second direction.

[0008] According to one aspect of the embodiment of the utility model, the heat dissipation device includes a plurality of the light-emitting devices, and the plurality of the light-emitting devices are arranged at intervals on the carrier. The heat exchange tube includes a plurality of the heat exchange zones corresponding to the light-emitting devices, and the first tube section of any heat exchange zone is connected to the second tube section of an adjacent heat exchange zone through a connecting tube section.

[0009] According to one aspect of the embodiments of the present utility model, the diameter of the first tube segment is greater than the diameter of the second tube segment, and the light emitting device covers at least a portion of the first tube segment.

[0010] According to one aspect of the embodiment of the utility model, the first tube segment includes a first sub-tube, a second sub-tube and a bent sub-tube connected therebetween, the first sub-tube and the second sub-tube are alternately arranged through the bent sub-tube, the light-emitting device covers at least part of the first sub-tube and the second sub-tube, and in the second state, the heat exchange medium in the first sub-tube flows along the first direction and the heat exchange medium in the second sub-tube flows along the second direction.

[0011] According to one aspect of the embodiment of the utility model, a receiving groove is provided on the surface of the carrier, the opening of the receiving groove faces the light-emitting device, the heat exchange tube is embedded in the receiving groove, and the surface of the heat exchange tube is flush with the surface of the carrier.

[0012] According to one aspect of the embodiment of the utility model, the heat exchange tube is connected to the carrier, the heat exchange tube protrudes from the surface of the carrier, and the light emitting device is connected to a side of the heat exchange tube away from the carrier.

[0013] According to one aspect of the embodiment of the utility model, the heat dissipation device includes a heat conductive member, which is arranged between the heat exchange tube and the light emitting device, and the heat conductive member at least covers the light emitting device.

[0014] According to one aspect of the embodiment of the utility model, the heat dissipation device includes a plurality of heat dissipation fins, which are arranged at intervals on a side of the support member away from the heat exchange tube, and the heat dissipation fins are protruding on the support member toward the side away from the heat exchange tube.

[0015] In another aspect, according to an embodiment of the present invention, a vehicle display system is provided, comprising the heat dissipation device as described above.

[0016] The embodiments of the utility model provide a heat dissipation device and a vehicle display system. By arranging a heat exchange tube on a carrier and covering the light-emitting device with the heat exchange tube, the light-emitting device can exchange heat with a heat exchange medium in the heat exchange tube. The heat exchange medium can absorb the heat generated by the light-emitting device and convert it from liquid to gas. Then, the heat exchange medium releases heat and converts it from gas to liquid to complete condensation, thereby realizing the circulation of the heat exchange medium in the heat exchange tube, ensuring that the heat exchange medium can continuously take away the heat generated by the light-emitting device, improving the heat dissipation capacity of the light-emitting device, and improving the overall heat dissipation effect. At the same time, the pressure difference generated by the gas-liquid state conversion of the heat exchange medium is used to form a driving force for the flow, thereby realizing the process of passive heat dissipation, so that the heat exchange medium always maintains a self-circulating state, thereby avoiding the use of external equipment to actively drive the heat exchange medium, reducing the heat dissipation cost while saving the installation space in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of a heat dissipation device according to an embodiment of the utility model;

[0019] Figure 2 It is a top view of a heat dissipation device according to an embodiment of the utility model;

[0020] Figure 3 yes Figure 2 AA section view in;

[0021] Figure 4 is a top view of another heat dissipation device according to an embodiment of the utility model;

[0022] Figure 5 yes Figure 3 BB cross-section diagram in.

[0023] Reference numerals:

[0024] 100-heat dissipation device; 10-carrier; 20-heat exchange tube; 30-light emitting device;

[0025] X-first direction; Y-second direction; M-heat exchange area;

[0026] 21-first pipe section; 22-second pipe section; 23-bent pipe section; 24-connecting pipe section;

[0027] 1-first sub-tube; 2-second sub-tube; 3-bent sub-tube; 40-heat conducting member; 50-heat dissipating fin.

[0028] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the utility model will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without the need for some of these specific details. The following description of the embodiment is only to provide a better understanding of the utility model by illustrating an example of the utility model. In the drawings and the following description, at least part of the known structures and technologies are not shown in order to avoid unnecessary ambiguity to the utility model; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0030] The directional words appearing in the following description are all directions shown in the figure, and do not limit the specific structure of the heat dissipation device and vehicle display system of the utility model. In the description of the utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In order to better understand the present invention, Figures 1 to 5 The heat dissipation device and the vehicle display system of the embodiments of the utility model are described in detail.

[0032] See also Figure 1 and Figure 2 According to an embodiment of the utility model, a heat dissipation device 100 is proposed, including a carrier 10, a heat exchange tube 20 and a light emitting device 30. The heat exchange tube 20 is arranged on the carrier 10, and a heat exchange medium is arranged in the heat exchange tube 20; the light emitting device 30 is arranged on the carrier 10 and covers a part of the heat exchange tube 20; wherein the heat dissipation device 100 has a first state and a second state. In the first state, the light emitting device 30 is extinguished, and the heat exchange medium is stationary in the heat exchange tube 20; in the second state, the light emitting device 30 is lit, and the heat exchange medium covered by the light emitting device 30 absorbs heat and is converted from liquid to gas to form a flow, and the heat exchange medium flowing out of the light emitting device 30 releases heat and is converted from gas to liquid to form a flow.

[0033] In this embodiment, the main consideration is that the light-emitting device 30 on the carrier 10 will generate heat after being lit. Therefore, a heat exchange tube 20 is set at the bottom of the light-emitting device 30 on the carrier 10 so that the light-emitting device 30 covers the heat exchange tube 20, and the heat of the light-emitting device 30 is dissipated by the heat exchange medium in the heat exchange tube 20.

[0034] Optionally, the heat exchange medium in the heat exchange tube 20 can be a working fluid with high latent heat of vaporization and thermal conductivity but low viscosity coefficient, such as water, ethanol, and acetone. The choice of heat exchange medium is determined by the operating temperature range, starting temperature difference, and heat dissipation requirements of the heat exchange tube 20.

[0035] Optionally, the heat exchange tube 20 may be a pulsating heat pipe, and the shell of the heat exchange tube 20 may be made of materials with high thermal conductivity such as copper and aluminum. The pulsating heat pipe may be used without a wick, and a wick with a structure such as grooves, wire mesh, or sintered particles may be added to enhance heat exchange. The type, thickness, porosity, and other parameters of the wick may be controlled to achieve the purpose of controlling the heat exchange rate.

[0036] The carrier 10 is usually a shell structure. The heat exchange tube 20 is arranged on the carrier 10. The two can be connected by various connection methods such as welding and bonding. The utility model does not specifically limit the connection method between the two.

[0037] Similarly, after the heat exchange tube 20 is connected to the carrier 10, the light emitting device 30 is connected to the position of the heat exchange tube 20, thereby forming a covering contact with the heat exchange tube 20 and completing the heat conduction process. The connection of the light emitting device 30 can also adopt a variety of connection methods.

[0038] The first state in this embodiment can be understood as a non-working state. In the first state, all the light-emitting devices 30 are in an off state and have no display function. Since the light-emitting devices 30 do not generate heat, the heat exchange medium is also stationary in the heat exchange tube 20 and does not form a flow force.

[0039] When the light emitting device 30 is turned on, it switches from the first state to the second state, which is the working state. After being turned on for a period of time, the light emitting device 30 will gradually generate heat, thereby exchanging heat with the heat exchange medium at the bottom.

[0040] The heat exchange medium directly covered by the light emitting device 30 absorbs the heat and gradually evaporates, forming a transition from liquid to gas. The heat exchange medium absorbs heat here, causing the bubbles to expand and burst rapidly, and the heat exchange tube 20 starts. Under low heat consumption conditions, the oscillation frequency is low, the amplitude is small, and the stagnation time is long. As the heat load increases, the internal oscillation and amplitude increase significantly. After reaching a certain value, a circular flow is formed, forming a driving force for the flow.

[0041] When the gaseous heat exchange medium gradually leaves the light emitting device 30 , the heat exchange medium gradually condenses under the action of the outside air, thereby changing from gas to liquid and continuing to flow, so that the heat exchange medium forms a cycle in the heat exchange tube 20 .

[0042] After the light-emitting device 30 is started, the evaporation section of the heat exchange tube 20 that it is in direct contact with absorbs heat, and the liquid column of the heat exchange medium evaporates and absorbs heat to form bubbles. The vapor column in the evaporation section becomes longer and the liquid column becomes shorter, and the bubbles continue to grow and begin to flow; then the condensation section of the heat exchange tube 20 begins to condense and release heat, the vapor column becomes shorter and the liquid column becomes longer. Since the density and pressure of the heat exchange medium in the evaporation section are higher than those in the condensation section, the heat exchange medium is driven to move to form a circulation in the tube, thereby realizing heat transfer. The circulation of the heat exchange tube 20 is a single-phase circulation, and the direction is determined by the interaction of the density and pressure difference between the evaporation and condensation sections. Therefore, the arrangement order of the light-emitting devices 30 is not restricted, and the circulation can be started as long as heat is generated.

[0043] It can be seen that the circulation flow of the heat exchange medium in the heat exchange tube 20 is not affected by the set angle, that is, no matter at what angle the light-emitting device 30 and the carrier 10 are placed, it will not affect the circulation of the heat exchange medium. This is because as long as the light-emitting device 30 generates heat, the heat exchange medium can not only absorb the heat to complete the heat dissipation, but also form a circulating power by the pressure difference, ensuring the circulation flow of the heat exchange medium and completing the passive heat dissipation process. Therefore, the heat dissipation device 100 in this embodiment can be adapted to installation settings at various angles.

[0044] The embodiment of the utility model provides a heat dissipation device 100, by arranging a heat exchange tube 20 on a carrier 10 and arranging a light-emitting device 30 to cover the heat exchange tube 20, so that the light-emitting device 30 can exchange heat with the heat exchange medium in the heat exchange tube 20, and the heat exchange medium can absorb the heat generated by the light-emitting device 30 and convert it from liquid to gas, and then complete condensation through the subsequent heat release of the heat exchange medium and converting it from gas to liquid, thereby realizing the circulation of the heat exchange medium in the heat exchange tube 20, ensuring that the heat exchange medium can continuously take away the heat generated by the light-emitting device 30, improving the heat dissipation capacity of the light-emitting device 30, and improving the overall heat dissipation effect. At the same time, the pressure difference generated by the gas-liquid state conversion of the heat exchange medium is used to form a driving force for the flow, thereby realizing the process of passive heat dissipation, so that the heat exchange medium always maintains a self-circulating state, thereby avoiding the use of external equipment to actively drive the heat exchange medium, reducing the heat dissipation cost while also saving the installation space in the vehicle.

[0045] As an alternative embodiment, see Figure 2The heat exchange tube 20 includes a heat exchange area M, the heat exchange area M includes a first tube segment 21, a second tube segment 22 and a bent tube segment 23 connected therebetween, the light emitting device 30 covers at least one of the first tube segment 21 and the second tube segment 22, and in the second state, the heat exchange medium in the first tube segment 21 flows along the first direction X and the heat exchange medium in the second tube segment 22 flows along the second direction Y.

[0046] Optionally, the light emitting device 30 is specifically covered on the heat exchange area M of the heat exchange tube 20, so as to realize the heat exchange process. The heat exchange area M is specifically formed by connecting the first tube segment 21, the second tube segment 22 and the bent tube segment 23, wherein the first tube segment 21 and the second tube segment 22 extend in different directions, so that the internal heat exchange medium flows in different directions, and the bent tube segment 23 plays the role of changing the extension direction of the tube segment.

[0047] The utility model does not specifically limit the extension direction of the first pipe section 21 and the second pipe section 22, and any angle can be formed between the two. As shown in the figure, the flow directions of the heat exchange tube 20 in the two sections can be opposite to each other, and the bent pipe section 23 forms an elbow structure, and the heat exchange medium forms a U-shaped flow as a whole.

[0048] Among them, the light-emitting device 30 needs to be set on the heat exchange tube 20, and can specifically cover any position in the first tube segment 21 or the second tube segment 22, so as to form a reliable contact area. The contact area with the tube segment can be adjusted according to the actual heat dissipation requirements of the light-emitting device 30.

[0049] The embodiment of the utility model provides a heat dissipation device 100, which forms a coil structure as a whole by setting the heat exchange area M as a first pipe segment 21 and a second pipe segment 22, thereby increasing the setting area of ​​the heat exchange tube 20 on the carrier 10, which is conducive to achieving simultaneous heat dissipation of multiple light-emitting devices 30.

[0050] As an alternative embodiment, see Figure 2 The heat dissipation device 100 includes a plurality of light emitting devices 30, which are spaced apart on the carrier 10. The heat exchange tube 20 includes a plurality of heat exchange areas M corresponding to the light emitting devices 30. The first tube section 21 of any heat exchange area M is connected to the second tube section 22 of the adjacent heat exchange area M through a connecting tube section 24.

[0051] In this embodiment, a plurality of light emitting devices 30 can be simultaneously arranged on the heat exchange tube 20 for heat dissipation, and each light emitting device 30 corresponds to a heat exchange zone M. The figure takes the arrangement of three light emitting units as an example for explanation.

[0052] Adjacent heat exchange areas M are connected by connecting pipe sections 24, specifically, the first pipe section 21 of one heat exchange area M is connected to the second pipe section 22 of the adjacent heat exchange area M, so that the heat exchange tube 20 as a whole forms a coil structure, further expanding the layout area on the supporting member 10.

[0053] Optionally, the coverage area or position of each light emitting device 30 and the corresponding heat exchange zone M may be different. As shown in the figure, the light emitting device 30 may only cover the first tube segment 21 or the second tube segment 22 or both, which depends on the actual heat dissipation of the light emitting device 30 and can be selectively set accordingly. The area covered by the light emitting device 30 forms the evaporation section of the heat exchange medium, and the remaining area forms the condensation section.

[0054] The embodiment of the utility model provides a heat dissipation device 100, which connects adjacent heat exchange areas M by using a connecting pipe section 24, so that the overall coil area of ​​the heat exchange tube 20 is further expanded, which is conducive to the simultaneous heat dissipation of multiple light-emitting devices 30. The increase in the setting area of ​​the heat exchange tube 20 is also conducive to accelerating the condensation process of the heat exchange medium and improving the heat dissipation efficiency of the light-emitting device 30.

[0055] As an optional embodiment, the diameter of the first tube segment 21 is greater than the diameter of the second tube segment 22 , and the light emitting device 30 covers at least a portion of the first tube segment 21 .

[0056] The diameter of the heat exchange tube 20 can be set to be the same everywhere. In this embodiment, the diameters of different pipe sections are designed differently. For example, the diameter of the first pipe section 21 is larger than the diameter of the second pipe section 22, so that a larger heat exchange medium flow rate is obtained in the first pipe section 21, and a better heat dissipation capacity is achieved.

[0057] The two pipe sections are also connected by a bent pipe section 23, wherein the light emitting device 30 can be covered on the first pipe section 21 with a larger diameter, so that heat exchange can be achieved over a larger area, which is beneficial to speeding up the heat dissipation process of the light emitting device 30. The utility model does not limit the setting position of the light emitting device 30, and selectively arranges it according to the actual heat dissipation of different light emitting devices 30.

[0058] The embodiment of the utility model provides a heat dissipation device 100, which covers and sets the light-emitting device 30 at the first tube section 21 with a larger tube diameter, thereby forming a larger heat exchange area between the light-emitting device 30 and the heat exchange tube 20, thereby improving the heat dissipation of the light-emitting device 30 and facilitating the completion of the heat dissipation process.

[0059] As an alternative embodiment, see Figure 4The first tube section 21 includes a first sub-tube 1, a second sub-tube 2 and a bent sub-tube 3 connected therebetween. The first sub-tube 1 and the second sub-tube 2 are alternately arranged through the bent sub-tube 3. The light-emitting device 30 covers at least part of the first sub-tube 1 and the second sub-tube 2. In the second state, the heat exchange medium in the first sub-tube 1 flows along the first direction X and the heat exchange medium in the second sub-tube 2 flows along the second direction Y.

[0060] In this embodiment, further heat dissipation of the light emitting device 30 is taken into consideration. When the light emitting device 30 is covered and arranged on the first tube segment 21 with a larger tube diameter, if the heat dissipation of the light emitting device 30 is too large and further heat dissipation is required, the first tube segment 21 can be further divided into multiple sub-tube segments.

[0061] Optionally, the first pipe segment 21 specifically includes a first sub-pipe 1 and a second sub-pipe 2 with smaller diameters. The heat exchange medium in the two pipe segments flows in opposite directions and is connected and changed direction by a bent sub-pipe 3. Several sub-pipe segments are alternately arranged, and multiple changes of direction are made through multiple bent sub-pipes 3, so that the heat exchange medium flows alternately along the first direction X and the second direction Y, so that a coil-like structure is formed inside the first pipe segment 21.

[0062] After the light emitting device 30 is covered and set on the first tube segment 21, due to the setting of the plurality of first sub-tubes 1 and the second sub-tubes 2, the light emitting device 30 covers multiple sub-tube segments at the same time, thereby further increasing the contact area between the two, forming more heat exchange processes, and improving the overall heat dissipation. Specifically, it can be selectively set according to the actual heat dissipation of the light emitting device 30, and the number and area of ​​the covered sub-tube segments are adjustable.

[0063] The embodiment of the utility model provides a heat dissipation device 100, which further divides the first pipe segment 21 into a plurality of first sub-tubes 1 and second sub-tubes 2 which are alternately arranged, so that the heat exchange medium can reciprocate in the first pipe segment 21. Similarly, as a coil-like structure, the heat exchange area between the light-emitting device 30 and the first pipe segment 21 can be further increased, with a higher heat exchange amount, thereby improving the heat dissipation effect.

[0064] As an optional embodiment, a receiving groove is provided on the surface of the carrier 10 , the opening of the receiving groove faces the light emitting device 30 , the heat exchange tube 20 is embedded in the receiving groove, and the surface of the heat exchange tube 20 is flush with the surface of the carrier 10 .

[0065] As for the specific method of arranging the heat exchange tube 20 on the carrier 10, in this embodiment, a receiving groove structure is arranged on the carrier 10, so that the heat exchange tube 20 is embedded in the receiving groove, so that the two are connected.

[0066] The heat exchange tube 20 can be embedded in the receiving groove of the carrier 10 by hot pressing, welding and other processes. Although this method increases the process difficulty, it can more effectively reduce thermal resistance and enhance heat exchange.

[0067] The embodiment of the utility model provides a heat dissipation device 100, which forms a reliable connection between the heat exchange tube 20 and the carrier 10 by arranging a receiving groove on the carrier 10 and embedding the heat exchange tube 20 into the receiving groove, which is beneficial to realize direct contact heat exchange between the light-emitting device 30 and the heat exchange tube 20, has a better heat exchange effect, and can make the surface of the carrier 10 flush, which is beneficial to the arrangement of the light-emitting device 30 on the carrier 10.

[0068] As an optional embodiment, the heat exchange tube 20 is connected to the carrier 10 , the heat exchange tube 20 protrudes from the surface of the carrier 10 , and the light emitting device 30 is connected to a side of the heat exchange tube 20 away from the carrier 10 .

[0069] Optionally, the heat exchange tube 20 can be flattened and directly attached to the surface of the carrier 10 with an interface material. This method is simple to assemble and easy to maintain, but the interface material will increase the overall thermal resistance of the system.

[0070] As an alternative embodiment, see Figure 3 and Figure 5 The heat dissipation device 100 includes a heat conductive member 40 , which is disposed between the heat exchange tube 20 and the light emitting device 30 , and the heat conductive member 40 at least covers the light emitting device 30 .

[0071] Optionally, the heat conductor 40 can adopt a thermal pad structure and be arranged between the heat exchange tube 20 and the light emitting device 30. The light emitting device 30 is connected to the heat exchange tube 20 through the heat conductor 40. The main function of the heat conductor 40 is to adjust the flatness and roughness between the solid planes, fill the gap between the light emitting device 30 and the heat exchange tube 20, enhance the heat transfer process, and have higher heat exchange efficiency.

[0072] When the heat exchange tube 20 is directly attached to the surface of the carrier 10, a heat conductor 40 may also be arranged between the two. The heat exchange tube 20 is attached to the surface of the carrier 10 through the heat conductor 40. At the same time, a heat conductor 40 is also arranged on the heat exchange tube 20 to form a connection with the light-emitting device 30, thereby improving the connection reliability at each position.

[0073] The embodiment of the utility model provides a heat dissipation device 100, which facilitates the connection between the heat exchange tube 20 and the light-emitting device 30 by setting a heat conductor 40 between the heat exchange tube 20 and the light-emitting device 30, improves the stability of the connection between the solid interfaces, and is also beneficial to the heat transfer between the heat exchange tube 20 and the light-emitting device 30, thereby improving the overall heat dissipation efficiency and having a better heat dissipation effect.

[0074] As an alternative embodiment, see Figure 3 and Figure 5 The heat dissipation device 100 includes a plurality of heat dissipation fins 50 , which are arranged at intervals on a side of the carrier 10 away from the heat exchange tube 20 , and the heat dissipation fins 50 are protruded on the carrier 10 toward the side away from the heat exchange tube 20 .

[0075] The heat dissipation fins 50 in this embodiment are mainly aimed at the condensation process of the heat exchange medium. Their function is to better discharge the heat in the heat exchange medium to complete the condensation process. They are arranged on the back of the carrier 10. Optionally, the heat dissipation fins 50 can be arranged in the area between the heat exchange tubes 20 to form a condensation area. Therefore, the arrangement flexibility is high for multiple light-emitting devices 30.

[0076] The heat dissipation ribs 50 may have various shapes and structures. The present invention does not impose any special restrictions on the specific structure of the heat dissipation ribs 50. At the same time, the spacing between the multiple heat dissipation ribs 50 may be determined according to actual heat dissipation requirements, and there is no special restriction on this.

[0077] Different extension angles can be set between multiple heat dissipation ribs 50. The length, width and height of the heat dissipation ribs 50 can be determined according to actual heat dissipation requirements. The heat dissipation ribs 50 can be used to accelerate the condensation process of the heat exchange medium. The utility model does not specifically limit the specific size and setting position of the heat dissipation ribs 50.

[0078] The embodiment of the utility model provides a heat dissipation device 100, which is helpful to accelerate the condensation process of the heat exchange medium by arranging heat dissipation fins 50 on the carrier 10, thereby improving the overall heat exchange efficiency and having a better heat dissipation effect.

[0079] According to an embodiment of the present invention, a vehicle display system is provided, comprising the heat dissipation device 100 as described above.

[0080] Optionally, the vehicle display system can be a head-up display system (HUD) in the vehicle. By utilizing the above-mentioned heat dissipation device 100, on the basis of being able to form a normal head-up display in the vehicle, the light-emitting device 30 can also be cooled at all times, ensuring that the display temperature around the light-emitting device 30 reaches a safe threshold range, thereby preventing excessive temperature from causing adverse effects on the display.

[0081] The embodiments of the utility model provide a heat dissipation device and a vehicle display system. By arranging a heat exchange tube on a carrier and covering the light-emitting device with the heat exchange tube, the light-emitting device can exchange heat with a heat exchange medium in the heat exchange tube. The heat exchange medium can absorb the heat generated by the light-emitting device and convert it from liquid to gas. Then, the heat exchange medium releases heat and converts it from gas to liquid to complete condensation, thereby realizing the circulation of the heat exchange medium in the heat exchange tube, ensuring that the heat exchange medium can continuously take away the heat generated by the light-emitting device, improving the heat dissipation capacity of the light-emitting device, and improving the overall heat dissipation effect. At the same time, the pressure difference generated by the gas-liquid state conversion of the heat exchange medium is used to form a driving force for the flow, thereby realizing the process of passive heat dissipation, so that the heat exchange medium always maintains a self-circulating state, thereby avoiding the use of external equipment to actively drive the heat exchange medium, reducing the heat dissipation cost while saving the installation space in the vehicle.

[0082] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat dissipation device, characterized in that: include: bearing member; A heat exchange tube is arranged on the supporting member, and a heat exchange medium is arranged in the heat exchange tube; A light emitting device is disposed on the carrier and covers a portion of the heat exchange tube; The heat dissipation device has a first state and a second state. In the first state, the light-emitting device is off and the heat exchange medium is stationary in the heat exchange tube; in the second state, the light-emitting device is on, the heat exchange medium covered by the light-emitting device absorbs heat and is converted from liquid to gas to form a flow, and the heat exchange medium flowing out of the coverage of the light-emitting device releases heat and is converted from gas to liquid to form a flow.

2. The heat dissipation device according to claim 1, characterized in that: The heat exchange tube includes a heat exchange area, and the heat exchange area includes a first tube segment, a second tube segment, and a bent tube segment connected therebetween. The light-emitting device covers at least one of the first tube segment and the second tube segment. In the second state, the heat exchange medium in the first tube segment flows along a first direction and the heat exchange medium in the second tube segment flows along a second direction.

3. The heat dissipation device according to claim 2, characterized in that: The heat dissipation device includes a plurality of the light-emitting devices, which are arranged at intervals on the carrier. The heat exchange tube includes a plurality of heat exchange zones corresponding to the light-emitting devices. The first tube section of any heat exchange zone is connected to the second tube section of an adjacent heat exchange zone through a connecting tube section.

4. The heat dissipation device according to claim 2, characterized in that: The diameter of the first tube segment is greater than the diameter of the second tube segment, and the light emitting device covers at least a portion of the first tube segment.

5. The heat dissipation device according to claim 4, characterized in that: The first tube section includes a first sub-tube, a second sub-tube and a bent sub-tube connected therebetween, the first sub-tube and the second sub-tube are alternately arranged through the bent sub-tube, the light-emitting device covers at least part of the first sub-tube and the second sub-tube, and in the second state, the heat exchange medium in the first sub-tube flows along the first direction and the heat exchange medium in the second sub-tube flows along the second direction.

6. The heat dissipation device according to claim 1, characterized in that: The surface of the carrier is provided with a receiving groove, the opening of the receiving groove faces the light emitting device, the heat exchange tube is embedded in the receiving groove, and the surface of the heat exchange tube is flush with the surface of the carrier.

7. The heat dissipation device according to claim 1, characterized in that: The heat exchange tube is connected to the carrier, the heat exchange tube protrudes from the surface of the carrier, and the light emitting device is connected to a side of the heat exchange tube away from the carrier.

8. The heat dissipation device according to claim 6 or 7, characterized in that: The heat dissipation device comprises a heat conducting member, which is arranged between the heat exchange tube and the light emitting device, and the heat conducting member at least covers the light emitting device.

9. The heat dissipation device according to claim 1, characterized in that: The heat dissipation device comprises a plurality of heat dissipation fins, which are arranged at intervals on a side of the support member away from the heat exchange tube, and the heat dissipation fins are protrudingly arranged on a side of the support member away from the heat exchange tube.

10. A vehicle display system, characterized in that: The invention comprises a heat dissipation device as claimed in any one of claims 1 to 9.

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