CN208670906U - LED headlamp radiator, illumination and/or signal indicating device and motor vehicles - Google Patents

Abstract

Present disclose provides a kind of LED headlamp radiator, illumination and/or signal indicating device and motor vehicles.Specifically, the LED headlamp radiator that the embodiment of the present disclosure provides includes: substrate；With multiple fins, it is arranged to vertically or obliquely extend and be separated from each other from substrate, wherein, each fin in the multiple fin is provided in proximally facing on respective length direction and distal end and shrinks, and the adjacent fins in substrate and the multiple fin limit fluid channel between them jointly.

Description

LED headlamp radiator, illumination and/or signal indicating device and motor vehicles

Technical field

The utility model relates to a kind of LED headlamp radiator, illumination and/or signal indicating device and motor vehicles.

Background technique

Illumination and/or signal indicating device, especially lamps and lanterns, are the indispensable components of motor vehicles, and are guaranteed The normal important tool with safety traffic of motor vehicles.Currently, motor vehicles are commonly designed with lamps and lanterns, such as at least before a pair Illuminator and a pair of of taillight.Lamps and lanterns especially headlight module for example passes by be based on incandescent technology, and (such as halogen bulb is as light Source), and as technology develops, the current also such as light-emitting diodes based on more low-power consumption and longer continuous working period of headlamp (" LED ") and the laser technology (such as semiconductor laser device is as light source) based on higher power are managed, the light source is put The light set in the shell with cover, and generated from light source is by the guidance of cover to external radiation.

LED light source is due to its many good characteristic, such as brightness is high, energy consumption is low, moulding is flexible and changeable, response speed More it is widely used in automobile front and taillight safely fastly.But the performance of LED light source and service life are by its operating temperature shadow It rings serious, it is necessary to have good cooling system to guarantee its normal work.

In practical applications, since these lamps and lanterns usually generate heat at work, in order to avoid heat is in lamp casing Accumulation is in internal opposite small space to influence light source normal work, it usually needs in the shell of lamps and lanterns, especially in light Radiator is set on the substrate in source and the fan for guiding air flowing to pass through radiator is extraly set, with convenient The heat generated in the shell of dissipation lamps and lanterns.Traditional heat sinks are manufactured by metal, by contacting with LED heat generating components surface, are inhaled The heat that LED light source generates is received, is dissipated the heat to the air by conduction and convection type, to guarantee the temperature of LED element Normally.In order to reinforce radiating, fan can be increased, forced convertion heat dissipation is carried out to radiator.Fan, which generates, has certain flowing speed The air draught of degree can quickly take away heat by heat convection when flowing through heat radiator fin, reduce radiator temperature, thus Guarantee that LED is worked normally.

However, the fin of the wind for guiding fan to generate of existing radiator is relatively very big to the retardation of wind, Cause air velocity uneven, air-flow mutually disturbs, and thus causes heat dissipation effect unsatisfactory.

Utility model content

In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the purpose of this utility model It is to provide a kind of LED headlamp radiator, a kind of illumination and/or signal indicating device and a kind of motor vehicles.

To achieve the goals above, the technical solution of the utility model is accomplished by the following way:

It is according to the present utility model in a first aspect, providing a kind of LED headlamp radiator, comprising: substrate, the substrate It is set plate-like；With multiple fins, it is arranged to vertically or obliquely extend and be separated from each other from substrate, wherein described Each fin in multiple fins be provided on respective length direction it is proximally facing and distal end shrink, and substrate with it is described Adjacent fins in multiple fins limit fluid channel between them jointly.

By the arrangement, orthographic projection of each fin in the plane for being parallel to substrate at least court along its length It is gradually tapered up to its both ends, so that the fluid channel for first shrinking and expanding afterwards is formed between adjacent fins, according to Bernoulli Jacob Principle helps to reduce the flow resistance of the fluid channel between adjacent fins, more swimmingly enters fluid channel convenient for fluid And accelerate fluid by one section of tapered prior fluid channel section, to increase from the effect for taking away heat with radiator base plate Rate；And the subsequent fluid channel section that one section is widened is then passed through to be convenient for controlling the increase of fluid velocity, to avoid mistake Degree accelerate to form the fluid of jet-like outgoing and to the impact of fluid channel exit and caused by reflux, while also avoiding flowing The exit in body channel due to boundary layer separation and form vortex so that ensure radiate while make fluid go out flow it is suitable Freely.By this set, the reduction of flow resistance and the appropriate increase of flow velocity are realized, consequently facilitating removal condensation.

In embodiment according to the present utility model, each fin in the multiple fin has in respective length side To transverse direction on side surface positioned opposite, projection of each side surface in the plane with substrate-parallel is smooth song Line or straight line, and every place is tangentially configured to thereon: it is substantially the same with flow direction at this is flowed through；Or with flow through this The flow direction at place is at the angle for being less than threshold angle.Smooth fin surface thereby is achieved, so that fin surface Fluid flow direction and surface profile move towards roughly the same or close, so that flow damping is reduced, it is adjacent convenient for passing through Air-flow between fin becomes uniform laminar flow.

In embodiment according to the present utility model, each fin in the multiple fin is in the plane with substrate-parallel On typically there is cross section in spindle, ellipse, shuttle shape or diamond shape.These specific cross-sectional forms can be realized Along its length to the cross section of both ends constriction.

In embodiment according to the present utility model, the multiple respective length direction of fin is parallel.Preferably, described Multiple fins are equally spaced apart in the transverse direction of respective length direction.So that being formed defined by the adjacent fins The substantially parallel air-flow of each fluid channel outflow and reduce flow-disturbing to each other.

In embodiment according to the present utility model, each fin configuration in the multiple fin is at identical solid figure Shape.It is convenient to realize fluid logical by the fluid between adjacent fins by the setting of this typical sizes and shape Steady acceleration when road.

In embodiment according to the present utility model, between the adjacent fins of the substrate being located in the multiple fin The surface of part be set in scraggly.Preferably, the adjacent fins of the substrate being located in the multiple fin Between the surface of part corrugated fluctuating is set.In other preferred embodiment according to the present utility model, institute The part stated between the adjacent fins of substrate being located in the multiple fin is equipped with multiple holes.It is arranged by these, just Conducive to increasing air-flow when flowing through the fluid channel between adjacent fins and the contact area of substrate, consequently facilitating enhancing air-flow with Heat exchange between substrate, thus improves radiating efficiency.

In additional embodiment according to the present utility model, the cross section of each fin in the multiple fin is set It is outwardly tapered at the normal direction along substrate.By this set, so that fluid channel is closer in the short transverse of fin Flow area in the part of substrate gets over constriction, to increase the fluid flow rate at this, accelerates the direct heat exchange with substrate, mentions High radiating efficiency.

In embodiment according to the present utility model, the LED headlamp radiator further include: at least one is first prominent It rises, be arranged between the adjacent fins on substrate and in the multiple fin and be arranged to adjacent to adjacent wing The distal end on the respective length direction of piece.In a further embodiment, each first protrusion is configured to have The width in the transverse direction of the respective length direction of adjacent fins gradually increased towards the distal end.Pass through setting this first Protrusion, then there is perturbation action in the inlet for having wider flow area of the fluid channel between adjacent fins for air-flow, Enabling more fully enhances heat exchange with substrate and fin contacts in inlet fluid；Simultaneously because inlet is wider Flow area will not generate excessive retardance to air-flow.

In embodiment according to the present utility model, LED headlamp radiator further include: at least one second protrusion, It is arranged between the adjacent fins on substrate and in the multiple fin and is arranged to each adjacent to adjacent fins From length direction on the proximal end.

Preferably, the minimum value for the spacing that each second protrusion is spaced apart with adjacent fins respectively is greater than each described The maximum value for the spacing that first protrusion is spaced apart with adjacent fins respectively.

Preferably, each first protrusion is greater than each described second at a distance from the edge of the far-end of the substrate Protrusion is at a distance from the edge of the proximal end of the substrate.

Preferably, height of each first protrusion in the normal direction of substrate is greater than each second protrusion in substrate Normal direction on height.

By the setting as above of the first protrusion and/or the second protrusion, cause the channel at outlet flow channels further Subdivision and airflow diversion then narrow.Specifically, this inlet to narrow greater than fluid channel narrows.As a result, outlet is attached Close flow velocity increases again, and air pressure reduces, and leads to further restriction effect in the direction of the air flow.Hereby it is achieved that increasing Entrance and outlet between pressure difference, produce additional suction effect, by classification accelerate, realize controllable fluid and add Speed.

Second aspect according to the present utility model, and a kind of illumination and/or signal indicating device are provided, comprising: shell；Light Source is placed in cavity defined by shell and is fixed to shell；According to LED headlamp radiator above-mentioned；And fan, It is arranged to the multiple fin for being fixed on the shell and being directed toward the LED headlamp radiator, and is configured to Guidance air flow to the fluid channel between the adjacent fins of the multiple fin, wherein the LED headlamp radiator with Light source connection, for example, the substrate of the radiator against and be fixed to the back side of light source.

Since the illumination and/or signal indicating device have an aforementioned LED headlamp radiator, and fan is towards phase The fluid channel of adjacent fin guides air-flow, to not only have all advantages of aforementioned heat sink, details are not described herein, also convenient Air-flow from fan is directed to flow across the radiator being directly secured together with light source to maximum thermal effect.

The third aspect according to the present utility model also provides a kind of motor vehicles, comprising: car body；With according to photograph above-mentioned Bright and/or signal indicating device, to have the advantages that similar to details are not described herein.

Technical solution provided by the utility model has following advantages: the radiator, illumination and/or signal of the utility model The flow velocity that instruction device and motor vehicles by setting as above, can pass through the air flowing of the radiator increases, To correspondingly make the dissipation of the heat from light source be maximized, while ensuring to flow smooth.

Detailed description of the invention

Fig. 1 (a) shows a kind of schematic diagram of the radiator of embodiment according to the present utility model, wherein fin Cross section is uniform shuttle shape；

Fig. 1 (b) shows the schematic diagram of the radiator of alternate embodiment according to the present utility model, wherein fin Cross section is non-uniform shuttle shape and tapered towards top；

The schematic partial structurtes that Fig. 1 (c) shows a kind of embodiment of expansion of the radiator as shown in Fig. 1 (a) are three-dimensional View wherein has multiple parallel arrangement of convex ridges in the part of the surface between two adjacent fins of the substrate of radiator And based on the groove between convex ridge；

The schematic partial structurtes that Fig. 1 (d) shows another embodiment expanded of the radiator as shown in Fig. 1 (a) are bowed View wherein has multiple holes in the part of the surface between two adjacent fins of the substrate of radiator；

Fig. 2 (a) shows the schematic diagram of the radiator of another embodiment according to the present utility model, wherein fin Cross section be uniform spindle；

Fig. 2 (b) shows the schematic diagram of the radiator of alternate embodiment according to the present utility model, wherein fin Cross section is non-uniform spindle and tapered towards top；

Fig. 3 (a) shows the schematic diagram of the radiator of another embodiment according to the present utility model, wherein fin Cross section be uniform ellipse；

Fig. 3 (b) shows the schematic diagram of the radiator of alternate embodiment according to the present utility model, wherein fin Cross section is non-uniform oval and tapered towards top；

Fig. 4 (a) shows the schematic diagram of the radiator of another embodiment according to the present utility model, wherein fin Cross section be uniform diamond shape；

Fig. 4 (b) shows the schematic diagram of the radiator of alternate embodiment according to the present utility model, wherein fin Cross section is non-uniform diamond shape and tapered towards top；

Fig. 5 shows velocity profile of the heat spreader structures as shown in Fig. 1 (a) after finite element modeling emulates；

Fig. 6 (a) shows the schematic diagram of conventional diffusers according to prior art, and wherein the cross section of fin is equal One rectangle；

Fig. 6 (b) shows velocity profile of the heat spreader structures as shown in Fig. 6 (a) after finite element modeling emulates；

The schematic partial structurtes that Fig. 7 (a) shows another embodiment expanded of the radiator as shown in Fig. 1 (a) are vertical Stereogram wherein has in the part of the surface between two adjacent fins of the substrate of radiator adjacent to finned length side At least one first protrusion 4 of upward distal end arrangement；

The schematic partial structurtes that Fig. 7 (b) shows another embodiment expanded of the radiator as shown in Fig. 1 (a) are vertical Stereogram wherein has in the part of the surface between two adjacent fins of the substrate of radiator adjacent to finned length side At least one second protrusion 5 of upward proximal end arrangement；

Fig. 7 (c) shows the schematic partial structurtes of another embodiment expanded again of the radiator as shown in Fig. 1 (a) Three-dimensional view is wherein provided with the first protrusion 4 as shown in Fig. 7 (a) and as shown in Fig. 7 (b) simultaneously on the substrate of radiator Second protrusion 5；

Fig. 8 shows the illumination according to the utility model embodiment and/or the structural schematic diagram of signal indicating device.

Specific embodiment

The technical solution of the disclosure is described in further detail by way of example and in conjunction with the accompanying drawings.In specification In, the same or similar drawing reference numeral indicates component functionally identical or similar.Following reference attached drawings are to disclosure embodiment Explanation be intended to explain the design of the overall utility model of the disclosure, and be not construed as a kind of limit to the disclosure System.In addition, in the following detailed description, to elaborate many concrete details to provide and implement to present disclosure convenient for explaining The comprehensive understanding of example.It should be apparent, however, that one or more embodiments without these specific details can also be by Implement.

Aiming at the problem that the aforementioned urgent need to resolve of state of the art, embodiment of the disclosure is it is also proposed that using by lamps and lanterns Light source generate heat with heating transparent cover and/or lens, for example, by being present in chamber defined by the shell of lamps and lanterns Heat heating made of stream of hot air be directed into the inner surfaces of translucent cover or lens.Thus, it is illustratively provided in embodiment A kind of radiator for realizing this purpose.

Fig. 1 (a) shows the structural schematic diagram of the radiator of one embodiment according to the disclosure.

Conceived according to the embodiment of the present disclosure general technical, provides a kind of radiator 100, comprising: substrate 1；With Multiple fins 2 are arranged respectively to vertically or obliquely extend and be separated from each other from substrate, wherein in the multiple fin 2 Each fin be provided on respective length direction (as shown in the arrow y of Fig. 1 (a)) it is proximally facing and distal end shrink, And the adjacent fins in substrate 1 and the multiple fin 2 limit fluid channel 3 between them jointly.

By the arrangement, orthographic projection of each fin 2 in the plane for being parallel to substrate 1 is at least along its length Towards it, proximally and distally this both ends gradually tapers up y, so that forming the fluid for first shrinking and expanding afterwards between adjacent fins 2 Channel 3.In fact, that is, each fin in the multiple fin 2 is configured to have y direction along its length Its distal end and direction at the fluid discharge side of the fluid channel 3 are flowed into adjacent to the fluid of the fluid channel 3 The cross section that this both ends of its proximal end at side are shunk.

According to bernoulli principle, by means of this arrangement, on the one hand facilitate to reduce the fluid between adjacent fins 2 The flow resistance in channel 3 more swimmingly enters fluid channel 3 convenient for fluid and adds by one section of tapered prior fluid channel section 31 Fast fluid, to increase from the efficiency for taking away heat with 100 substrate 1 of radiator；And on the other hand, one section is then passed through The subsequent fluid channel section 32 widened is convenient for controlling the increase of fluid velocity, to avoid excessive acceleration forms jet-like outgoing Fluid and to the impact in 3 exit of fluid channel and caused by flow back, while also avoiding in the exit of fluid channel 3 due to side The separation of interlayer and form vortex so that ensure radiate while make fluid go out flow it is smooth.By this set, realize The appropriate increase of the reduction of flow resistance and flow velocity in fluid channel 3, consequently facilitating removal condensation.

In accordance with an embodiment of the present disclosure, for example, as shown in Fig. 1 (a), each fin in the multiple fin 2 has A contralateral surface 21,22 positioned opposite in the transverse direction (as shown in the arrow x of Fig. 1 (a)) of respective length direction, it is each described Projection of the side surface in the plane with substrate-parallel is smooth curve or straight line, that is, each side of the cross section is Smooth curve or straight line.Preferably, each point is continual curvature on each side.It is highly preferred that each side Upper each point is that curvature variation is continuous.And the tangential of every place on this smooth curve or straight line is configured to and flows through Flow direction at this is substantially the same, or is alternatively provided to and flows through flow direction at this at being less than threshold angle The angle of (such as 5 °), thus the side surface of substantially each fin is arranged in smooth surface profile, to be conducive to stream Body is swimmingly flowed by the side surface without being hindered or being interfered by it.

Specifically, in accordance with an embodiment of the present disclosure, each fin in the multiple fin is for example with flat with substrate A variety of cross-sectional forms in capable plane.More specifically, as shown in Fig. 1 (a) and Fig. 1 (b), each fin 2 is in along its length Spend the fusiform cross-sectional that direction extends and both ends are sharp；As shown in Fig. 2 (a) and Fig. 2 (b), each fin 2 ' is in side along its length To extension and both ends are the spindle cross section of the blunt end of constriction；As shown in Fig. 3 (a) and Fig. 3 (b), each fin 2 " is in along it Length direction extension and both ends are the oval cross section of the smooth curve of constriction；And as shown in Fig. 4 (a) and Fig. 4 (b), often A fin 2 " ' in the lozenge shape cross-section extended along its length and both ends are sharp.

Wherein, typically, since the side of the shuttle shape of diagram, spindle and oval cross section is curve, thus essence The side surface of upper each fin is smooth curved surface, and the side compared to lozenge shape cross-section is straight line to necessarily intersect in straight line There are the turning points of curvature mutation at place, then the fin for having shuttle shape, spindle and oval cross section is more easily implemented fluid It is steady to accelerate and slow down, and be less prone to it is disturbed, to avoid generating turbulent flow.

In accordance with an embodiment of the present disclosure, as shown in Fig. 1 (a) and Fig. 1 (b), for example, the respective length of the multiple fin 2 Direction is parallel to each other, so that being not easy to mutually dry from the fluid stream substantially co-flow that adjacent flow channels 3 flow out It disturbs；And it is highly preferred that for example, the multiple fin is also in first-class of the transverse direction (as shown by arrow A) of respective length direction It is spaced apart away from ground, so that the fluid stream from the outflow of adjacent flow channels 3 is uniform.Similarly, such as Fig. 2 (a) and Fig. 2 (b), Fig. 3 (a) and Fig. 3 (b), Fig. 4 (a) and Fig. 4 (b) are shown, and fin similar can be arranged, and thus have similar technical effect, Details are not described herein.

According to the exemplary embodiments of the disclosure, as shown in Fig. 1 (a), for example, adjacent fins in the multiple fin 2 it Between minimum spacing D_gapGreater than the maximum width of both adjacent fins, that is, it is respectively greater than the respective width W of the two_a、W_b, and Less than the sum of the respective maximum width of the adjacent fins (W_a+W_b).Such gap and wide association, according to finite element modeling Emulation is proved to be conducive to generate the liquid flow pattern gently accelerated and be not easy to generate boundary layer separation in exit.

Also, as an example, each fin configuration in the multiple fin is at identical three-dimensional shape, such as such as Fig. 1 (a), shown in Fig. 2 (a), Fig. 3 (a), Fig. 4 (a), and the respective width of each fin is set as respectively less than 5mm, such as can be Within the scope of 2mm to 5mm；Fin clearance is for example arranged in correspondence with as within the scope of 2mm to 5mm.Preferably, the maximum of single fin Width is, for example, 3.2mm；Correspondingly, the minimum clearance between fin is for example set as 4.3mm.

As an example, the thickness of the fin is for example within the scope of 2mm to 5mm, such as 3mm to 5mm.The height of fin can To be given according to actual design requirement, length is generally dependent on the expanded range to heat dissipation region on substrate.It is general and Speech, the side surface area of fin is bigger, and heat dissipation area is bigger, and heat dissipation effect is better.But as fin is along the height of the normal direction n of substrate Degree increase so that fin heads are sufficiently remote from substrate when, then typically, the height of fin be arranged in correspondence between 10mm extremely Between 50mm, all is for example about 10 times of fin width or fin clearance.

Preferably, a kind of radiator based on the uniform fusiform cross-sectional fin as shown in Fig. 1 (a) carries out finite element modeling It analyzes to analyze the fluid flow rate distribution by it, parameter is for example arranged are as follows: as shown in Fig. 1 (a), such as in fin width Maximum width is set as 3.2mm and correspondingly, and in the case that the minimum clearance between fin is set as 4.3mm, fin is high Degree is for example set as 30mm；And assume that radiator base plate has the cross section of 50mm side length.By carrying out finite element to the model Emulation, obtains the velocity flow profile pattern of the fluid of the model by the radiator as shown in Figure 5.

Also, this field routine has thickness uniformly and the radiator of the rectangular fin of parallelly distribute on arrangement such as Fig. 6 (a) It schematically shows.And in order to carry out the comparison of fluid flow rate distribution patterns, this conventional diffusers of this field are modeled Analysis, such as parameter setting are as follows: fin thickness uniformly and its width, gap, height be typically provided as respectively 3mm, 4.5mm, Thus 30mm obtains the velocity flow profile of the fluid of the model of this conventional radiator as shown in Fig. 6 (b) through this field Pattern.

By the way that finite element simulation velocity profile corresponding with the schematic radiator of the disclosure shown in Fig. 1 (a) is schemed 5, finite element simulation velocity profile, that is, Fig. 6 (b) corresponding with the radiator of the routine of this field shown in Fig. 6 (a) is compared, Respectively obtain as in Fig. 5, Fig. 6 (b) respectively being located under its side surface in fin orthographic projection, in, the sample point of upstream 1., 2., the flow speed value contrast table 1 3. located, it is as follows:

	Prior art model	Current design model	Ratio
				Sample point 1	0.37m/s	0.70m/s	189%
Sample point 2	0.53m/s	0.96m/s	181%
				Sample point 3	0.59m/s	0.76m/s	129%

Table 1

Table as above flows through the flow velocity of its fluid gradually as it can be seen that in the application of the conventional scheme radiator of the prior art Successively decrease.Contrastingly, in the application for the radiator currently arranged, conventional scheme radiator compared with the prior art, effectively Ground reduces flow resistance, significantly increases the flow velocity at outlet flow channels；And the increase of this flow velocity is by first gradually increasing It is convenient to exist during fluid flows through its to by the increase control of flow velocity obtained from adding flow velocity, gradually reducing flow velocity again In a certain range, rather than be monotonically changed, so as to avoid exit as the impact to flight tip and caused by flow back, together When also avoid forming vortex due to the separation in boundary layer in the exit of fluid channel 3.

In the further embodiment of the disclosure, for example, the adjacent wing of the substrate being located in the multiple fin The surface of part between piece is set in scraggly.For example, the part table between two adjacent fins of substrate Face is arranged in spot-like projections pattern/uneven surface of frosted shape pattern or the uneven surface of corrugated fluctuating；Or Person, for example, the part of the surface between two adjacent fins of substrate is formed as having vertical along it as shown in Fig. 1 (c) Length direction extend multiple parallel arrangement of extension convex ridges 11 and based on the elongated slot 12 between convex ridge.Such setting convenience In the total heat dissipation area to heat-delivery surface and the fluid for flowing through it for increasing substrate, thus enhances heat exchange between the two, mention High cooling efficiency.

In the alternative embodiment of the disclosure, for example, the substrate is located at the multiple fin as shown in Fig. 1 (d) In adjacent fins between part can also be equipped with multiple holes 13, such hole 13 can be recess portion and be also possible to non-pass through Logical counterbore.Such same convenient total heat dissipation area to heat-delivery surface and the fluid for flowing through it for increasing substrate of setting, Thus enhance heat exchange between the two, improve radiating efficiency.

In the other embodiment of the disclosure, for example, each fin in the multiple fin is configured to along substrate Normal direction n it is outwardly tapered.More specifically, as shown in Fig. 1 (b), as the alternative solution of Fig. 1 (a), it illustrates have to be in The radiator of pyramidal fin 2, the cross section of each fin are still in the increase of shuttle shape but cross sectional dimensions with fin height And it is gradually reduced towards fin heads (direction i.e. far from substrate 1).As shown in Fig. 2 (b), as the alternative solution of Fig. 2 (a), It illustrates the radiators having in pyramidal fin 2 ', and the cross section of each fin is still in spindle but cross sectional dimensions It is gradually reduced with the increase of fin height towards fin heads (direction i.e. far from substrate 1).As shown in Fig. 3 (b), as The alternative solution of Fig. 3 (a), it illustrates the radiators having in pyramidal fin 2 ", and the cross section of each fin is still in ellipse Round but cross sectional dimensions is gradually reduced with the increase of fin height towards fin heads (direction i.e. far from substrate 1). Be in pyramidal fin 2 " it illustrates having as the alternative solution of Fig. 4 (a) as shown in Fig. 4 (b) ' radiator, each The cross section of fin still assumes diamond in shape but cross sectional dimensions is with the increase of fin height and towards fin heads (i.e. far from substrate 1 Direction) be gradually reduced.

The setting in the pyramidal substitution fin reduced towards tip size in this way, so that fluid channel 3 Flow area in the short transverse of fin closer to the part of substrate 1 gets over constriction, to dramatically increase adjacent to substrate 1 The fluid flow rate at place accelerates the direct heat exchange with substrate, improves radiating efficiency.It simultaneously will not be in the entire side surface of fin (especially at the position close to its top of side surface) comparably changes fluid flow rate, convenient to pass through required design institute The inclined degree of fin in the height direction is stated to change the distribution of the current gradient in short transverse.

In the further embodiment of the disclosure, as shown in Fig. 7 (a), the radiator is for example further include: at least one First protrusion 4, be set on substrate 1 and be located at the multiple fin 2 in adjacent fins between and be arranged to neighbouring The distal end on the respective length direction y of adjacent fins 2.Also, more specifically, for example, as shown, each described One protrusion 4 be configured to towards the distal end gradually increase on the lateral x of the respective length direction y of adjacent fins 2 Width W_x-4.In other words, first protrusion is configured to the scale on the direction transverse to the length direction towards institute State the shape that distal portion gradually increases.By this set so that subsequent fluid channel section 32 above-mentioned be subdivided into it is multiple go out Flow subchannel, thus fluid again pass by proximate distal ends these go out flow subchannel and be split；And according to Bernoulli Jacob's original Reason, it is such to go out to flow the presence of subchannel, lead to collecting (especially because the first protrusion has for the circulation area of fluid channel The width W widened towards distal end_x-4Exacerbate the contraction of this circulation area) so that further being produced in the exit of fluid channel Raw shunting effect, generates further throttling action, and consequently lead to the variation of pressure difference, increases barometric gradient, cause Additional suction effect is produced at mouthful, and then further facilitates the outflow of fluid by aspirating, and is thus formed to i.e. It will go out to flow the secondary acceleration of fluid.It is realized as a result, by the way that the first additional protrusion 4 is arranged for accelerated-moderating process Again speeding up for stream fluid will be gone out, controlled acceleration step by step is realized, so as to avoid since the thicker middle part of fin The monotone variation of the flow velocity downstream phenomenon uncontrolled with the therefore caused fluid of stream out.

In the other further embodiment of the disclosure, the radiator for example alternatively includes (i.e. such as Fig. 7 (b) institute Show) or extraly include (i.e. as shown in Fig. 7 (c)) at least one second protrusion 5, it is set on substrate 1 and is located at described more Between adjacent fins in a fin 2 and it is arranged to described close on the respective length direction y of adjacent fins 2 End.By the way that this second protrusion 5 is arranged, be conducive to provide disturbance for fluid and appropriate at wider fluid channel inlet Retardance, consequently facilitating the fluid of the acceleration near fluid channel inlet carries out and the sufficient heat exchange with heat-radiating substrate；Simultaneously Since fluid channel inlet is wider, and the initial flow rate for entering the fluid of fluid channel is slightly gentler than downstream, and the second protrusion 5 is set Excessive retardation will not be caused to the subsequent acceleration of fluid by setting.

In the further embodiment of the disclosure, as shown in Fig. 7 (c), it is provided with 4 He of the first protrusion simultaneously on substrate In the case where second protrusion 5, for example, each second protrusion 5 is respectively with adjacent fins 2 in spaced space D_x-5 Minimum value be greater than each first protrusion 4 respectively with adjacent fins 2 in spaced space D_x-4Maximum value, by This, since the second protrusion 5 width single in generated multiple subchannels that become a mandarin after the shunting of 3 entrance of fluid channel is answered Greater than due to the first protrusion 4 generated after the shunting of 3 near exit of fluid channel it is multiple go out stream subchannels in single width, from And make: finally going out stream caused by the radiator (such as shown in Fig. 1 (a)) of both first and second protrusions with being not provided with Flow velocity is compared, and entrance is gone out to flow stream compared with caused by the effect of the fluid that becomes a mandarin of low velocity to final by the second protrusion 5 The influence of speed, should be right much smaller than caused by the effect by the first protrusion 4 flow velocity of stream out increased near exit flow velocity Go out to flow the influence of flow velocity in final.

In the further embodiment of the disclosure, as shown in Fig. 7 (c), it is provided with 4 He of the first protrusion simultaneously on substrate In the case where second protrusion 5, for example, the edge distance D of each first protrusion 4 and the far-end of the substrate 1_y-4Greatly In the edge distance D of each second protrusion 5 and the proximal end of the substrate_y-5；In other words, first protrusion 4 is compared In the turning point of the variation in the direction that bends on the surface that second protrusion 5 is closer to each fin.So that First protrusion 4 compared to the second protrusion 5 be closer in fluid channel between its (for what is accelerated to fluid) prior fluid Crossover position between channel section 31 and (for fluid down) subsequent fluid channel section 32, i.e. the first protrusion 4 to the second Protrusion 5 is arranged deeper into fluid channel.Made by this set, influence of first protrusion 4 for the flow velocity of fluid, The second protrusion 5 of influence much larger than to(for) the flow velocity of fluid.As a result, accelerating and second in fluid channel between the first order Channel segment length between grade acceleration is further reduced.To with the radiator (example for being not provided with both first and second protrusions As shown in Fig. 1 (a)) caused by finally go out stream flow velocity compare, by the second protrusion 5 for entrance becoming a mandarin compared with low velocity Go out to flow the influence of flow velocity to final caused by the effect of fluid, it should be much smaller than by deeper into the first protrusion 4 in fluid channel For finally going out to flow the influence of flow velocity caused by the effect of the stream of stream out increased near exit flow velocity.

In the further embodiment of the disclosure, as shown in Fig. 7 (c), it is provided with 4 He of the first protrusion simultaneously on substrate In the case where second protrusion 5 due at outlet flow channels such as channel need to make as far as possible along the big of finned length direction y It causes the velocity flow profile at same distance to homogenize as far as possible, and usually requires to make fluid and substrate as far as possible at fluid channel inlet Between heat exchange it is abundant as far as possible, cause the height for the second protrusion 5 to be not necessarily required to be arranged to be similar to fin height, and The height needs of one protrusion 4 are set to as far as possible close to fin height.As a result, for example, each first protrusion 4 is in substrate Normal direction n on height H_n-4Greater than height H of each second protrusion 5 on the normal direction n of substrate_n-5.To, taken into account with The efficiency of the direct heat exchange of substrate maximizes and goes out being uniformly distributed for stream flow velocity.

According to the another aspect of the embodiment of the present disclosure, as shown in figure 8, provide again it is a kind of illumination and/or signal designation dress Set 200, comprising: shell 101；Light source 102 is placed in cavity 103 defined by shell and is fixed to shell 101；According to Radiator 100 above-mentioned；And fan, it is arranged to and is fixed on the shell 101 and is directed toward the multiple of the radiator Fin 2, and be configured to that air is guided to flow to the fluid channel 3, wherein the substrate 1 of the radiator 100 is set At against and be fixed on the flat back side of light source 102.

This illumination and/or signal indicating device 200 thereby is achieved as previously described due to including aforementioned heat sink 100 Reduction flow resistance realize the increased technical effect of controllable flow velocity, have the advantages that all of aforementioned heat sink, it is no longer superfluous again It states.Meanwhile it also facilitating the air-flow from fan and being directed to flow across the radiator being directly secured together with light source to maximum Change heat dissipation effect.

According to the embodiment of the present disclosure again in another aspect, additionally providing a kind of motor vehicles, comprising: car body；Before basis The illumination stated and/or signal indicating device.Since the motor vehicles include aforementioned heat sink 100, thereby is achieved such as preceding institute The reduction flow resistance stated realizes the increased technical effect of controllable flow velocity, has the advantages that all of aforementioned heat sink, again no longer It repeats.

Although the utility model is illustrated in conjunction with attached drawing, embodiment disclosed in attached drawing is intended to practical to this Novel preferred embodiment illustrates, and should not be understood as a kind of limitation to the utility model.

Although some embodiments of the utility model general plotting have been shown and have illustrated, those of ordinary skill in the art will Understand, in the case where the principle and spirit conceived without departing substantially from this totality utility model, these embodiments can be made a change, this The range of utility model is limited with claim and their equivalent.

Claims (16)

1. a kind of LED headlamp is with radiator (100) characterized by comprising

Substrate (1)；With

Multiple fins (2) are arranged to vertically or obliquely extend and be separated from each other from substrate (1),

Wherein, each fin in the multiple fin (2) is provided in proximally facing on respective length direction and distal end It shrinks, and the adjacent fins in substrate and the multiple fin (2) limit fluid channel (3) between them jointly；

Each fin in the multiple fin (2) has side surface positioned opposite in the transverse direction of respective length direction (21,22), projection of each side surface in the plane parallel with substrate (1) are smooth curve or straight line, and thereon Every the tangential of place is configured to:

It is substantially the same with flow direction at this is flowed through；Or

With flow through flow direction at this into the angle for being less than threshold angle.

2. LED headlamp according to claim 1 is with radiator (100), which is characterized in that in the multiple fin (2) Each fin there is the cross section in spindle, ellipse, shuttle shape or diamond shape in the plane parallel with substrate (1).

3. LED headlamp according to claim 1 is with radiator (100), which is characterized in that the multiple fin (2) is each From length direction it is parallel.

4. LED headlamp according to claim 3 is with radiator (100), which is characterized in that the multiple fin (2) exists It is equally spaced apart in the transverse direction of respective length direction.

5. LED headlamp according to claim 3 is with radiator (100), which is characterized in that in the multiple fin (2) Each fin configuration at identical three-dimensional shape.

6. LED headlamp according to any one of claim 1 to 5 is with radiator (100), which is characterized in that the base The surface of part between the adjacent fins of plate (1) being located in the multiple fin (2) is set in scraggly.

7. LED headlamp according to any one of claim 1 to 5 is with radiator (100), which is characterized in that the base Part between the adjacent fins of plate (1) being located in the multiple fin (2) is equipped with multiple holes (13).

8. LED headlamp according to any one of claim 1 to 5 is with radiator (100), which is characterized in that described more Each fin in a fin (2) is configured to outwardly tapered along the normal direction of substrate (1).

9. LED headlamp according to any one of claim 1 to 5 is with radiator (100), which is characterized in that further include: At least one first protrusion (4) is arranged between the adjacent fins on substrate (1) and in the multiple fin (2), simultaneously And it is arranged to the distal end on the respective length direction of adjacent fins.

10. LED headlamp according to claim 9 is with radiator (100), which is characterized in that each first protrusion (4) it is configured to the width in the transverse direction of adjacent fins (2) respective length direction gradually increased towards the distal end Degree.

11. LED headlamp according to claim 9 is with radiator (100), which is characterized in that further include: at least one Two protrusions (5) are arranged between the adjacent fins on substrate (1) and in the multiple fin and are arranged to neighbour It is bordering on the proximal end on the respective length direction of adjacent fins.

12. LED headlamp according to claim 11 is with radiator (100), which is characterized in that each second protrusion (5) minimum value for the spacing being spaced apart respectively with adjacent fins is greater than each first protrusion (4) respectively between adjacent fins The maximum value of the spacing separated.

13. LED headlamp according to claim 11 is with radiator (100), which is characterized in that each first protrusion (4) it is greater than the proximal end of each second protrusion (5) and the substrate (1) at a distance from the edge of the far-end of the substrate Edge distance.

14. LED headlamp according to claim 11 is with radiator (100), which is characterized in that each first protrusion (4) it is greater than height of each second protrusion (5) in the normal direction of substrate (1) in the height in the normal direction of substrate (1).

15. a kind of illumination and/or signal indicating device (200) characterized by comprising

Shell (101)；

Light source (102) is placed in cavity defined by shell (101) and is fixed to shell (101)；

The LED headlamp according to any one of preceding claims 1 to 14 is with radiator (100)；With

Fan is arranged to the multiple wing for being fixed on the shell (101) and being directed toward the LED headlamp radiator Piece (2), and be configured to that air is guided to flow to the fluid channel (3),

Wherein, the LED headlamp is connected with radiator (100) and the light source (102) heat transfer.

16. a kind of motor vehicles characterized by comprising

Car body；With

Illumination according to claim 15 and/or signal indicating device (200).