CN104359058A - LED (light-emitting diode) lamp - Google Patents

Abstract

The invention provides an LED (light-emitting diode) lamp, which comprises an outer cover and a luminous element accommodated in the outer cover, wherein the outer cover comprises an annular peripheral wall and a bottom wall arranged at one end of the peripheral wall; the luminous element is arranged on the surface, adjacent to the peripheral wall, of the bottom wall. The LED lamp also comprises an upper shell, wherein the upper shell comprises an annular radiation wall, a top wall arranged at one end of the radiation wall and a connecting part arranged at the opposite end of the radiation wall; the connecting part is formed by the extension of the end part, adjacent to the outer cover, of the radiation wall, and is fixedly attached to the surface, away from the peripheral wall, of the bottom wall of the outer cover. According to the LED lamp, by virtue of reasonable structural design and light source layout, the LED lamp is endowed with high radiation performance and radiation efficiency, and the invention can be applied to a high-power LED lamp; meanwhile, a conventional finned radiator is eliminated, so that the weight and the production cost of the LED lamp are reduced, an assembly process is simplified, and the LED lamp is attractive in overall appearance.

Description

A kind of LED lamp

technical field

The invention relates to a lighting device, in particular to an LED lamp.

Background technique

With the gradual improvement of the light efficiency of high-power LEDs, LED lamps have been widely used in the field of lighting. Among them, lamps using LEDs as light sources have technical characteristics such as energy saving and long life. However, LEDs, like traditional light sources, also generate heat during operation, and the amount of heat generated depends on the overall luminous efficiency of the LED. Specifically, the working life of LED components is inversely proportional to the working temperature, so good heat dissipation is an important link in the design of LED lamps. At present, the existing LED lamps adopt the layout structure of centralized and fixed LED lamp beads, and then use the LED fin radiator specially used for heat dissipation to take away the LED heat and exchange heat with the air through the fins to achieve the purpose of heat dissipation . The problem with this design is that because the LED lamp beads are concentrated and fixed on a relatively small area, a large amount of heat increases the temperature due to the superposition effect and also increases the difficulty of transferring heat to the outside, especially in high-power The bottleneck phenomenon of poor heat dissipation channels is caused during application. At the same time, the use of large and heavy fin radiators also increases the cost of lamps. In addition, in order to cooperate with the installation of fin radiators and the overall aesthetics, it needs The intricately designed structure and shell fix and wrap the finned heat sink.

Contents of the invention

In view of this, the present invention provides an LED lamp capable of solving the above problems.

In order to solve the above problems, the present invention provides an LED lamp, which includes an outer cover and a light-emitting element accommodated in the outer cover, the outer cover includes an annular peripheral wall and a bottom wall arranged at one end of the peripheral wall; the light-emitting element is arranged on The bottom wall is adjacent to one side of the peripheral wall; the LED lamp further includes an upper case connected to a side of the bottom wall away from the peripheral wall, the upper case includes an annular heat dissipation wall, and is arranged on the heat dissipation wall. The top wall at one end of the wall and the connecting portion located at the other opposite end of the heat dissipation wall; the connecting portion is formed by extending the end of the heat dissipation wall adjacent to the outer cover, and the connecting portion is far away from the bottom wall of the outer cover One side of the surrounding wall is fixed.

Preferably, the diameter of the peripheral wall gradually increases from one end adjacent to the bottom wall toward the other opposite end.

Preferably, the diameter of the heat dissipation wall gradually increases from the end where the top wall is located toward the end where the connecting portion is located.

Preferably, the LED lamp further includes a circuit board disposed between the light emitting element and the bottom wall, and a thermal interface material is disposed between the circuit board and the bottom wall.

Preferably, one end of the heat dissipation wall adjacent to the top wall is provided with a heat dissipation hole.

Preferably, the heat dissipation wall includes a first heat dissipation section connected to the connection part, a second heat dissipation section bent and extended from an end of the first heat dissipation section away from the connection part, and a second heat dissipation section formed by the second heat dissipation section A third heat dissipation section bent and extended from one end away from the first heat dissipation section, the end of the third heat dissipation section away from the second heat dissipation section is connected to the top wall, the first heat dissipation section, the first heat dissipation section Both the second heat dissipation section and the third heat dissipation section are ring-shaped, and the diameter of the first heat dissipation section gradually decreases from an end adjacent to the connecting part to an end adjacent to the second heat dissipation section. The diameter of the two heat dissipation sections gradually decreases from one end adjacent to the first heat dissipation section to one end adjacent to the third heat dissipation section, and the diameter of the third heat dissipation section is from one end adjacent to the second heat dissipation section to The top wall is tapered.

Preferably, the peripheral wall in the outer cover is a first heat dissipation path, the heat dissipation wall in the upper housing is a second heat dissipation path, and the ratio of the first heat dissipation path to the second heat dissipation path is 1:100 to 10:1.

Preferably, the ratio of the first heat dissipation path to the second heat dissipation path is 1:1.

Preferably, the LED lamp further includes a heat dissipation inner shell accommodated in the upper casing or the outer cover, the heat dissipation inner shell is in an annular structure, and one end of the heat dissipation inner shell is away from the bottom wall. One side of the light emitting element is fixed.

Preferably, an opening is opened on the top wall of the upper case, the heat dissipation inner shell is partially protruded from the opening, and the heat dissipation inner shell protrudes from the opening. hole.

Preferably, the number of the heat dissipation inner shell is at least one.

An LED lamp, which includes a light-emitting element and a heat dissipation device, the light-emitting element dissipates heat through the heat dissipation device, the radiator includes an upper shell and a lower shell, and the outer sides of the upper shell and the lower shell are The walls form an annular structure together, and the diameter of the annular structure gradually increases from the upper casing to the lower casing; an upper bottom is extended inwardly from an end of the lower casing close to the upper casing, and the One end of the upper casing close to the lower casing is fixedly connected to the upper bottom; the light-emitting element is arranged on a side of the upper bottom away from the connection part.

Preferably, the connection part is an annular belt-shaped structure.

An LED lamp, which includes an outer cover and a light-emitting element accommodated in the outer cover, the outer cover includes an upper outer cover and a lower outer cover connected with the upper outer cover, and an end of the upper outer cover near the lower outer cover extends inwardly. The connecting part, the end of the lower housing close to the upper housing is fixedly connected to the connecting part, and the light-emitting element is arranged on the side of the connecting plate away from the upper housing.

The present invention has the following beneficial effects:

Through reasonable structural design and light source layout, the above-mentioned LED lamps enable the heat generated by the light-emitting elements to be quickly conducted away from the surrounding wall, upper casing and other components, so that the LED lamps have excellent heat dissipation performance and heat dissipation efficiency, and can be applied to high-power LED lamps. At the same time, because the traditional fin heat sink is omitted, the weight and manufacturing cost of the LED lamp are reduced, the assembly process is simplified, and the LED lamp has overall aesthetics.

Description of drawings

Fig. 1 is a schematic structural diagram of an LED lamp in the first embodiment of the present invention, wherein the connecting part of the upper housing and the bottom wall of the housing are connected and fixed by means of interference fit or spot welding.

Fig. 2 is a schematic structural view of the LED lamp in the first embodiment of the present invention, wherein the connecting part of the upper housing and the bottom wall of the housing are connected and fixed by brazing.

Fig. 3 is a schematic structural view of the LED lamp in the first embodiment of the present invention, wherein the connection part in the upper housing and the bottom wall of the housing are connected and fixed by means of screws.

Fig. 4 is a schematic structural view of the LED lamp in the first embodiment of the present invention, wherein the connecting part in the upper housing and the bottom wall of the housing are connected and fixed by riveting.

5 is a schematic structural diagram of an LED lamp in a second embodiment of the present invention, wherein a heat dissipation inner case is disposed in the upper case, and the heat dissipation inner case is accommodated on the upper case.

Fig. 6 is a schematic structural view of the LED lamp in the second embodiment of the present invention, wherein a heat dissipation inner shell is disposed in the upper casing, and the inner heat dissipation casing partially protrudes from the opening of the top wall of the upper casing.

Fig. 7 is a schematic structural diagram of an LED lamp in a third embodiment of the present invention, wherein two heat-dissipating inner shells are arranged in the upper shell.

Fig. 8 is a schematic structural view of the LED lamp provided by the present invention, wherein the peripheral wall of the outer cover is trumpet-shaped.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to FIG. 1 , the first embodiment of the present invention provides an LED lamp 100 , which includes a housing 10 and a light emitting element 20 contained in the housing 10 .

The housing 10 includes an annular peripheral wall 11 and a bottom wall 12 disposed at one end of the peripheral wall 11 . It can be understood that, in this embodiment, the outer cover 10 is preferably a barrel-shaped structure. The peripheral wall 11 is located at the opposite end of the bottom wall 12 , which is the light emitting portion of the LED lamp 100 . The diameter of the peripheral wall 11 can be specifically set according to the application occasion of the LED lamp 100. Preferably, the diameter of the peripheral wall 11 gradually increases from one end adjacent to the bottom wall 12 to the opposite end, that is, The cross-section of the peripheral wall 11 is gradually reduced from one end where the light exiting portion is provided to the other opposite end. It can be understood that the shape of the peripheral wall 11 can also be trumpet-shaped, see FIG. 8 for details. In this embodiment, the above-mentioned structural arrangement conforms to people's inherent habit of using LED lamps, and at the same time can obtain a wider light distribution, so that it is suitable for workplaces with large areas and vertical or near-vertical working surfaces. The inner and outer surfaces of the surrounding wall 11 of the outer cover 10 are smooth surfaces, so that the outer cover 10 can radiate and dissipate heat when in use, that is, the heat dissipation efficiency of the LED lamp 100 can be improved. At the same time, the aesthetics of the LED lamp 100 can be improved, and the manufacturing cost can be reduced. Further, in order to improve the heat dissipation capability of the outer cover 10, the outer cover 10 is made of a material with better heat dissipation, such as aluminum alloy, ceramics and the like. In this embodiment, preferably, the outer cover 10 is made of aluminum alloy.

The light emitting element 20 is disposed on a side of the bottom wall 12 adjacent to the peripheral wall 11 . The light emitting element 20 is the light source of the LED lamp 100. Preferably, the light source of the LED lamp 100 is a high-power light source, that is, the power of the light source of the LED lamp is greater than 40W. The light-emitting element 20 includes a plurality of lamp beads, the plurality of lamp beads are arranged on the bottom wall 12 in a ring shape, and the area of the bottom wall 12 surrounded by the plurality of lamp beads is smaller than the area of the bottom wall 12 One-half, so that the light-emitting elements 20 are dispersedly distributed on the bottom wall 12 , so that each part of the housing 10 can dissipate heat to the light-emitting elements 20 evenly.

The LED lamp 100 further includes an upper casing 30 connected to a side of the bottom wall 12 away from the peripheral wall 11, and the upper casing 30 can be further subdivided into: an annular heat dissipation wall 31, an A top wall 32 at one end of the wall 31 and a connecting portion 33 disposed at another opposite end of the heat dissipation wall 31 . In this embodiment, preferably, the diameter of the heat dissipation wall 31 gradually increases from the end with the top wall 32 toward the end with the connecting portion 33, wherein the diameter of the end of the connecting portion 33 is It is equal to the diameter of the bottom wall of the outer cover.

In order to promote the heat dissipation effect of the upper case 30, the heat dissipation wall 31 can be further subdivided into a first heat dissipation section 311 connected to the connecting portion 33, and the first heat dissipation section 311 is away from the The second heat dissipation section 312 bent and extended from one end of the connecting portion 33 and the third heat dissipation section 313 bent and extended from the end of the second heat dissipation section 312 away from the first heat dissipation section 311 , the third heat dissipation section 313 One end away from the second heat dissipation section 312 is connected to the top wall 32, the first heat dissipation section 311, the second heat dissipation section 312 and the third heat dissipation section 313 are all ring structures, and the first heat dissipation section 311 The diameter of a heat dissipation section 313 gradually decreases from its end adjacent to the connecting portion 33 to the end adjacent to the second heat dissipation section 312 , and the diameter of the second heat dissipation section 312 decreases from its end adjacent to the first heat dissipation section 311 One end of the third heat dissipation section 313 gradually decreases toward an end adjacent to the third heat dissipation section 313 , and the diameter of the third heat dissipation section 313 gradually decreases from its end adjacent to the second heat dissipation section 312 toward the top wall 32 . In this embodiment, the second heat dissipation section 312 is preferably configured as a horizontal disk-shaped structure connecting the first heat dissipation section 311 and the third heat dissipation section 313 . In this way, when the LED lamp 100 provided by this embodiment is in operation, the heat generated by the light-emitting element 20 is transmitted from the bottom wall 12 of the outer cover 10 to the upper casing 30, and passes through the first heat dissipation wall 31 of the upper casing 30 in turn. A heat dissipation section 311 , a second heat dissipation section 312 and a third heat dissipation section 313 discharge the heat in the LED lamp 100 in a timely manner.

Of course, in order to further promote the heat dissipation effect of the upper casing 30, the upper casing 30 is provided with a heat dissipation hole 3131 at the position of the third heat dissipation section 313, so that the LED lamp 100 can perform internal and external air exchange during use, Further, the heat dissipation efficiency of the LED lamp is improved.

The connecting portion 33 is formed by extending from the end portion of the heat dissipation wall 31 adjacent to the outer cover 10 , and the connecting portion 33 is attached and fixed to a side of the bottom wall 12 of the outer cover 10 away from the peripheral wall 11 . It can be understood that the bottom wall 12 of the outer cover 10 is a circular plate-shaped structure, and its upper and lower surfaces are smooth. The connecting portion 33 leans against or adheres to the outer surface of the bottom wall 12 to fix the upper casing 10 on the outer cover 10 . The fixing method of the upper casing 30 to the bottom wall 12 of the outer cover 10 through its connecting portion 33 facilitates the fixing of the upper casing 30, that is, facilitates the fixing of the upper casing 30 on the bottom wall 12. assembly. At the same time, the contact area between the bottom wall 12 of the housing 10 and the connecting portion 33 can be maximized, so that the heat on the bottom wall 12 can be quickly transferred to the upper casing 30 for heat dissipation. Preferably, in order to obtain the largest contact area between the bottom wall 12 and the connecting portion 33, the structure of the connecting portion 33 corresponds to the structure of the bottom wall 12, that is, the surfaces of the connecting portion 33 are closely attached to each other. on the outer surface of the bottom wall 12 . In this embodiment, in order to meet the theme of heat dissipation of LED lamps described in the present invention, the connecting portion 33 of the upper housing 30 and the surrounding wall 11 are preferably fixed by interference fit or welding to obtain the maximum heat dissipation. The contact area, wherein the welding method can be fixed by spot welding (see FIG. 1 ), brazing (see FIG. 2 ) or argon arc welding. Since the connecting portion 33 is fixed on the peripheral wall 11 by means of interference fit or welding, the two are more convenient to assemble. Moreover, the welding method can also make the heat conduction between the connecting portion 33 and the bottom wall 12 better, and the welding material at this time is equivalent to the thermal interface material, thereby further improving the heat dissipation efficiency of the LED lamp 100 to the light-emitting element 20 . In the actual application of the LED lamp in the present invention, it is preferable to use the connection method of interference fit or spot welding process. It can be understood that, in other embodiments, according to different needs, the connection between the connecting portion 33 of the upper housing 30 and the bottom wall 12 of the outer cover 10 can be screwed (see FIG. 3 ) or riveted (see FIG. 3 ). Figure 4) way to connect and fix. In order for the upper case 30 to have good heat dissipation performance, the connecting portion 33 is integrally formed with the heat dissipation wall 31 and made of a material with good heat dissipation function. In this embodiment, the connecting portion 33 and the heat dissipation wall 31 can be integrally formed by aluminum alloy.

It can be understood that when the LED lamp 100 in this embodiment is in use, the peripheral wall 11 of the outer cover 10 and the heat dissipation wall 31 of the upper housing 30 are heat dissipation devices for dissipating heat from the light emitting element 20 . Specifically, the peripheral wall 11 in the outer cover 10 is defined as the first heat dissipation path H1, the heat dissipation wall 31 in the upper housing 30 is defined as the second heat dissipation path H2, and the first heat dissipation path H1 is connected with the second heat dissipation path. Path H1 has a ratio of 1:100 to 10:1. When the LED lamp 100 in this embodiment is working, the heat generated by the light-emitting element 20 passes through the bottom wall 12 and dissipates along the peripheral wall 11 and the two ends of the heat dissipation wall 31. It can be seen from the above that due to the first heat dissipation path H1 and the second heat dissipation path The size of the path H2 is equal, so that the upper and lower parts of the peripheral wall 11 separated by the connecting plate 30 have a balanced heat dissipation capability, thereby improving the overall heat dissipation efficiency of the LED lamp 100 . Preferably, the ratio of the first heat dissipation path H1 to the second heat dissipation path H2 is 1:1.

In order to achieve normal light emission and heat dissipation of the light emitting element 20 in this embodiment, the LED lamp 100 further includes a circuit board 40 disposed between the light emitting element 20 and the bottom wall 12 . Further, a thermal interface material (not shown in the figure) is provided between the circuit board 40 and the bottom wall 12 to fill the micro-gap and surface unevenness generated when the circuit board 40 is bonded or contacted with the bottom wall 12 of the housing 10 The uneven holes reduce the heat transfer contact resistance and improve the heat dissipation performance of the circuit board 40 and the bottom wall 12 so as to quickly conduct the heat emitted by the light emitting element 20 to the upper casing 30 . During the specific use of this embodiment, the circuit board 40 may be bonded to the side of the bottom wall 12 facing the peripheral wall 11 by using a thermal interface material such as thermal conductive glue. It can be understood that, in this embodiment, the bottom wall 12 for fixing the light emitting element 20 may be a circuit board 40 .

In order to facilitate the use of the LED lamp 100 of this embodiment, the LED lamp 100 also includes a hook 50, so that the LED lamp 100 can be conveniently hung through the hook 50 to illuminate its outer cover 10 when the LED lamp 100 is in use. In the case where the surrounding wall 11 corresponds. It can be understood that the hook 50 is disposed on the top wall 32 of the upper casing 30 .

It can be understood that in this embodiment, when the LED lamp 100 is working, the heat generated by the light-emitting element 20 is conducted to the bottom wall 12 through the thermal interface material, and then to the peripheral wall 11 and the upper surface of the housing 10 via the bottom wall 12. Diffusion and heat dissipation are performed on the heat dissipation wall 31 of the casing 30 . The surfaces of the peripheral wall 11 and the heat dissipation wall 31 dissipate heat to the outside through both radiation and convection. The total thermal resistance of the heat dissipation path that determines the heat dissipation efficiency of the LED lamp 100 in this embodiment is equal to the sum of the thermal resistances of all links in the heat dissipation path. After the LED lamp is energized for a sufficient time, under certain ambient temperature and air velocity conditions, the LED lamp as a whole will reach a thermal equilibrium. At this time, the temperature difference Δt between the temperature of the light-emitting element 20 of the LED lamp and the air is called the temperature difference of the LED lamp. Junction temperature rise, where the lower the junction temperature rise of LED lamps, the longer the expected life of the LED.

The factors that affect the junction temperature rise of LED lamps are analyzed as follows:

From the above analysis of the heat dissipation path, it can be known that the heat dissipation from the light-emitting element 20 of the LED lamp to the heat dissipation surface is conduction heat dissipation, and there are two ways of heat dissipation from the heat dissipation surface of the LED lamp to the external environment: radiation and convection. Since different heat dissipation methods involve Different influencing factors and calculation methods are discussed separately below:

1. During the conduction heat dissipation process from the light-emitting element 20 to each heat dissipation surface of the LED lamp, the factors affecting the junction temperature rise Δt include the dissipation power of the LED, the thermal conductivity coefficient of various heat dissipation materials on the heat dissipation path, and the cutoff of the heat conductor. Area, length of heat transfer path and other four items. Therefore, the temperature difference in this section of the heat transfer path can be expressed by the following formula:

Δt1=L·Q1/K·A;

Among them, Q1 represents the dissipation power of the LED lamp, in W; K represents the thermal conductivity, in W/m·℃; A represents the cross-sectional area of the heat conductor, in m ² ; Δt1 represents the two ends of the heat transfer path in this section Temperature difference, the unit is °C; L represents the heat transfer path length, the unit is m.

This embodiment adopts the layout scheme of distributing the light emitting elements 20 as much as possible, so that the equivalent power dissipation Q1 on the unit heat dissipation material is greatly reduced, and at the same time, the equivalent cross-sectional area of the heat conductor is increased, and the structural design is also fully utilized. The dissipated heat of the LED is transferred to the center of the connection board 30 and the outer cover 10 at an equal distance as far as possible, so as to achieve a better heat dissipation effect.

2. In the process of dissipating heat from the heat dissipation surfaces of LED lamps to the environment, the factors that affect the junction temperature rise Δt in the convective heat conduction include three factors: heat transfer coefficient, effective heat transfer area, and temperature difference between the heat transfer surface and the fluid. . Specifically, it can be expressed as follows:

Δt2=Q2/hc·A;

Among them, Q2 represents the amount of convective heat dissipation, in W; hc represents the heat transfer coefficient, in W/m ² A; A represents the effective heat transfer area, in m ² ; Δt2 represents the temperature difference between the heat transfer surface and the fluid, in ℃.

In this embodiment, the inner and outer surfaces of the entire LED lamp are used as the effective heat exchange area, which is larger than the traditional fin heat dissipation structure, so this structure has a good convection heat dissipation effect. At the same time, the traditional fin heat dissipation structure does not consider the effect of radiation heat dissipation too much. In fact, because the fins are not far apart, the effect of radiation heat dissipation is almost completely offset by the absorption effect of adjacent fins. However, In the LED lamp 100 of this embodiment, since the inner and outer surfaces of the entire LED lamp are smooth, radiation heat dissipation also plays a significant role, which further reduces the junction temperature rise Δt.

In summary, the LED lamp 100 in this embodiment makes full use of the principle of heat dissipation and rationally arranges the layout of LEDs and utilizes the inherent advantages of LED lamps such as the peripheral wall 11 of the outer cover 10 and the heat dissipation wall 31 of the upper casing 30. The components are designed with an efficient heat dissipation structure, which not only effectively reduces the temperature rise Δt of the LED junction, but also reduces the cost of the lamp, simplifies the assembly process, and maintains the overall aesthetics of the LED lamp 100 .

Please refer to FIG. 5 and FIG. 6, which are LED lamps 200 disclosed in the second embodiment of the present invention, which include a housing 210, a light-emitting element 220 accommodated in the housing 210 and connected to the housing 210 for heat dissipation The upper case 230.

Compared with the LED lamp 100 provided in the first embodiment of the present invention, the structure and working principle of the LED lamp 200 provided in the second embodiment of the present invention are roughly the same, and the main difference lies in: the inside of the upper casing 230 of the LED lamp 200 A heat dissipation inner shell 234 accommodated in the upper shell 230 is additionally provided. The heat dissipation inner shell 234 has a ring structure, and one end of the heat dissipation inner shell 234 is connected and fixed to a side of the bottom wall 212 away from the light emitting element 220 . In this embodiment, preferably, the diameter of the heat dissipation inner shell 234 gradually decreases in a direction away from the outer cover 210 . The heat dissipation inner shell 234 is spaced apart from the upper shell 230 . Wherein the heat dissipation inner case 234 can be accommodated in the upper case 230 according to requirements, or partly protrude from the opening 201 of the top wall 232 of the upper case 230, wherein the opening 201 is arranged at the On the top wall 231 of the upper housing 230 . It can be understood that, in the LED lamp provided by the present invention, the heat dissipation inner case provided can also be provided as an integrated structure with the bottom wall, and of course, the heat dissipation inner case provided can also be accommodated in the outer cover.

In this embodiment, an upwardly extending heat dissipation inner shell 234 is designed on the bottom wall 211 of the outer periphery 210, and the chimney effect formed thereby can generate heat convection during use, so that the heat produced by the light emitting element 220 can The hot air is conducted out from the heat dissipation inner shell 234, so that the LED lamp 200 has excellent heat dissipation performance and heat dissipation efficiency, can be applied to high-power LED lamps, and effectively utilizes the space of the LED lamp 200, ensuring the The aesthetics of the LED lamp 200 as a whole.

When the heat dissipation inner shell 234 is accommodated in the upper shell 230, the hook 250 is fixed on the top wall 232 of the upper shell 230; The hook 250 is fixed on the top of the heat dissipation inner shell 234 . The heat dissipation inner shell 234 can not only effectively utilize the space and take into account the appearance, but also can dissipate heat quickly.

Compared with the LED lamp 100 provided in the first embodiment of the present invention, the LED lamp 200 provided in the second embodiment of the present invention has a heat dissipation inner shell 234 extending in a direction away from the light-emitting element 220 due to the upper casing 230 , further improving the heat dissipation effect of the LED lamp 200 provided in the second embodiment of the present invention.

Please refer to FIG. 7 , which shows an LED lamp 300 disclosed in the third embodiment of the present invention. It includes an outer cover 310 , a light emitting element 320 accommodated in the outer cover 310 and an upper casing 330 connected to the outer cover 310 for heat dissipation.

Compared with the LED lamp 200 provided by the second embodiment of the present invention, the main difference of the LED lamp 300 provided by the third embodiment of the present invention is that: the LED lamp 300 provided by the third embodiment of the present invention has an additional cooling The inner shells 334 , one of the heat dissipation inner shells 334 is disposed inside the upper casing 330 , and the other heat dissipation inner shell 334 protrudes from the opening 301 of the top wall 332 of the upper casing 330 . It can be understood that, compared with the LED lamp 100 provided in the first embodiment, the LED lamp 300 provided in the third embodiment of the present invention also has excellent heat dissipation performance and heat dissipation effect, can discharge heat in time, and is suitable for high-power LED lamps.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (14)

1. a LED lamp, it comprises outer cover and is contained in the light-emitting component in described outer cover, it is characterized in that, described outer cover comprises annular perisporium and is located at the diapire of described perisporium one end; Described light-emitting component is arranged on the one side of the contiguous described perisporium of described diapire; Described LED lamp comprises the upper shell be connected away from the one side of described perisporium with described diapire further, described upper shell comprise annular heat radiation wall, be located at the roof of described heat radiation wall one end and be located at the connecting portion of described another opposite end of heat radiation wall; Described connecting portion is extended to form by the end of the contiguous described outer cover of described heat radiation wall, and the diapire of described connecting portion and described outer cover is fixed away from the one side of described perisporium.

2. LED lamp according to claim 1, is characterized in that, the diameter of described perisporium is increased towards another direction, opposite end gradually by the one end being close to described diapire.

3. LED lamp according to claim 1, is characterized in that, the diameter of described heat radiation wall is increased towards the extreme direction being provided with described connecting portion gradually by the one end being provided with described roof.

4. LED lamp according to claim 1, is characterized in that, described LED lamp also comprises the circuit board be arranged between described light-emitting component and described diapire, is provided with thermal interfacial material between described circuit board and described diapire.

5. LED lamp according to claim 1, is characterized in that, one end of the contiguous described roof of described heat radiation wall offers louvre.

6. LED lamp according to claim 1, it is characterized in that, described heat radiation wall comprises the first radiating segment be connected with described connecting portion, by described first radiating segment away from the second radiating segment of one end bending extension of described connecting portion and by three radiating segment of described second radiating segment away from one end bending extension of described first radiating segment, described 3rd radiating segment is connected with described roof away from one end of described second radiating segment, described first radiating segment, described second radiating segment and described 3rd radiating segment are loop configuration, and one end that the diameter of described first radiating segment is close to described connecting portion by it reduces gradually towards the one end being close to described second radiating segment, one end that the diameter of described second radiating segment is close to described first radiating segment by it reduces gradually towards the one end being close to described 3rd radiating segment, the diameter of described 3rd radiating segment is reduced towards described roof gradually by one end of its contiguous described second radiating segment.

7. LED lamp according to claim 1, it is characterized in that, perisporium in described outer cover is the first heat dissipation path, and the heat radiation wall in described upper shell is the second heat dissipation path, and the ratio of described first heat dissipation path and described second heat dissipation path is 1:100 to 10:1.

8. LED lamp according to claim 7, is characterized in that, the ratio of described first heat dissipation path and described second heat dissipation path is 1:1.

9. LED lamp according to claim 1, it is characterized in that, described LED lamp also comprises the heat radiation inner casing be placed in described upper shell or outer cover, and described heat radiation inner casing is loop configuration, and the one side that one end of described heat radiation inner casing and described diapire deviate from described light-emitting component is fixed.

10. LED lamp according to claim 9, is characterized in that, the roof of described upper shell offers opening portion, is stretched out by described opening portion described heat radiation inner shell sections, and described heat radiation inner casing stretch out described opening portion part on offer louvre.

11. LED lamp according to claim 9, is characterized in that, the quantity of described heat radiation inner casing is at least one.

12. 1 kinds of LED lamp, it comprises a light-emitting component and a heat abstractor, described light-emitting component is dispelled the heat by described heat abstractor, it is characterized in that, this radiator comprises a upper shell and a lower house, described upper shell forms a loop configuration together with the lateral wall of lower house, and the diameter of this circulus increases toward lower house gradually from described upper shell; Described lower house extends internally out near one end of described upper shell a upper bottom portion, and described upper shell is fixedly connected with described upper bottom portion near one end of described lower house; Described light-emitting component is arranged on the side of upper bottom portion away from connecting portion.

13. LED lamp according to claim 12, is characterized in that, described connecting portion be an endless belt-shaped structure.

14. 1 kinds of LED lamp, it comprises outer cover and is contained in the light-emitting component in described outer cover, it is characterized in that, the lower outer cover that described outer cover comprises outer cover on one and is connected with upper outer cover, described upper outer cover extends internally out near the end of lower outer cover a junction, described lower outer cover is fixedly connected with described connecting portion near the end of upper outer cover, and described light-emitting component is arranged on the side of described connecting portion away from upper outer cover.