CN110513627B

CN110513627B - LED lamp

Info

Publication number: CN110513627B
Application number: CN201910600234.2A
Authority: CN
Inventors: 王名斌; 江涛
Original assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Current assignee: Jiaxing Super Lighting Electric Appliance Co Ltd
Priority date: 2017-12-08
Filing date: 2018-12-07
Publication date: 2022-05-27
Anticipated expiration: 2038-12-07
Also published as: CN212156699U; CN111520652B; CN109899728A; CN212156709U; CN111520653B; CN111520653A; CN110513627A; CN214675778U; CN212456342U; CN213237005U; CN212461721U; CN111520652A; CN214147459U; CN211010828U; CN211475541U; CN212456343U; WO2019109991A1; CN109899728B

Abstract

The invention discloses an LED lamp, which is characterized by comprising: a lamp housing; the passive heat dissipation assembly comprises a heat sink, the heat sink comprises heat dissipation fins and a heat dissipation base, and the heat dissipation fins are connected with the lamp shell; the power supply is positioned in the lamp shell; the lamp panel is connected to the radiator and comprises an LED chip, and the power supply is electrically connected with the LED chip; the first heat dissipation channel is formed in the inner cavity of the lamp shell; and a second heat dissipation channel formed in the heat dissipation fins and the heat dissipation base; the weight of the LED lamp is less than 1.7 kg; when the LED lamp is supplied with electric energy of less than 300 watts, the LED chip is lightened, and luminous flux of at least 25000 lumens is emitted.

Description

LED lamp

The invention relates to a divisional application with the name of 'one LED lamp' filed on 07 th 12 th month in 2018 by the Chinese patent office with the application number of 201811492241.7.

Technical Field

The invention relates to an LED lamp, in particular to a high-power LED lamp, and belongs to the field of illumination.

Background

The LED lamp is widely applied to various illumination fields because of the advantages of energy conservation, high efficiency, environmental protection, long service life and the like. The heat dissipation problem of the high-power LED is receiving attention as an energy-saving green light source, and the excessive temperature may cause the light emitting efficiency to be attenuated, and if the waste heat generated by the operation of the high-power LED cannot be effectively dissipated, the waste heat may directly affect the life of the LED, so the solution of the heat dissipation problem of the high-power LED has become an important research and development subject of many related people in recent years.

In some applications, there may be weight limitations for the entire LED lamp. For example, when the LED lamp employs a certain specification of a base and the LED lamp is used in a suspended manner, the maximum weight of the LED lamp is limited to a certain range. Therefore, the weight of the heat sink for dissipating heat of the LED lamp is limited to a limited range after removing necessary components such as a power supply, a lamp cover, and a lamp housing. For some high power LED lamps, the power is 150W

300W, the luminous flux of which can reach around 20000 to 45000 lumen, that is, the heat sink, within its weight limits, needs to dissipate the heat generated from the LED lamp generating 20000 to 45000 lumen.

In the prior art, the heat dissipation design of the LED lamp is unreasonable: in the case of natural convection heat dissipation, a heat dissipation area of 35 cm square or more is generally required for 1W power. That is, under the weight limitation of the heat sink, the prior art only uses passive heat dissipation, and can hardly achieve heat dissipation of the LED lamp with high power (greater than 150W) and large lumen (greater than 20000 lumen), so that the heat generated during the operation of the LED lamp can not be dissipated in time, and the life of the LED lamp can be affected for a long time.

For example, in the fanless LED spot light disclosed in the chinese patent publication No. CN 204717489U, the fins of the heat sink have no convection from bottom to top, so that after the heat of the fins is radiated to the air, the heat of the air cannot be dissipated in time, so that the temperature of the air around the fins rises, and the important factor affecting the heat radiation efficiency of the fins is the temperature difference between the fins and the ambient air, and therefore, the rise in the air temperature affects the subsequent heat radiation of the fins.

In the prior art, the power supply is unreasonable to set up: for some high-power LED lamps, if the power reaches 150W-300W, the heat dissipation of the power supply is also important, and if the heat generated by the power supply cannot be dissipated in time when the LED lamp works, the service life of some electronic components (especially components with high heat sensitivity, such as a capacitor) can be influenced, so that the service life of the whole lamp is influenced. For example, in the patent of chinese invention with publication number CN 203190364U, a two-channel air convection lamp heat dissipation structure and a PAR lamp using the same are disclosed, wherein heat dissipation fins and a cavity for accommodating a power supply (a part of the cavity is directly formed on the heat dissipation device), and no effective thermal isolation exists between a light source and the cavity for accommodating the power supply, and heat generated by the heat dissipation fins and the light source is easy to directly enter the cavity by thermal conduction, thereby affecting the power supply in the cavity.

In view of the above, the present invention and embodiments thereof are set forth below.

Disclosure of Invention

The invention mainly solves the technical problem of providing an LED lamp to solve the problem.

The invention provides an LED lamp, which is characterized by comprising:

a lamp housing;

the passive heat dissipation assembly comprises a heat radiator, the heat radiator comprises heat dissipation fins and a heat dissipation base, and the heat dissipation fins are connected with the lamp shell;

the power supply is positioned in the lamp shell;

the lamp panel is connected to the radiator and comprises an LED chip, and the power supply is electrically connected with the LED chip;

the first heat dissipation channel is formed in the inner cavity of the lamp shell; and

a second heat dissipation channel formed in the heat dissipation fins and the heat dissipation base;

the weight of the LED lamp is less than 1.7 kg;

when the LED lamp is supplied with electric energy of less than 300 watts, the LED chip is lightened, and luminous flux of at least 25000 lumens is emitted.

Optionally, when the LED lamp is supplied with less than 250 w of electric energy, the LED chip is lit and emits at least 25000 lumens of luminous flux.

Optionally, when 200 watts of power is supplied to the LED lamp, the LED chip is lit and emits at least 25000 lumens of luminous flux.

Optionally, the weight of the heat sink is less than 1.2 kg.

Optionally, the first heat dissipation channel has a first air inlet at one end of the lamp housing, and a heat dissipation hole is formed at the other end of the lamp housing opposite to the first heat dissipation channel, and the first heat dissipation channel dissipates heat from the power supply by using a chimney effect during convection.

Optionally, the second heat dissipation channel has a second air inlet, and air enters from the second air inlet, passes through the second heat dissipation channel, and finally flows out from a space between the heat dissipation fins.

Optionally, a third opening is formed in the lamp panel, and the third opening is communicated with the first heat dissipation channel and the second heat dissipation channel respectively.

Optionally, the third opening is provided in a region of the center of the lamp panel, and the first air inlet hole and the second air inlet hole respectively admit air from the third opening.

Optionally, the lamp further comprises a lamp cover, the lamp cover comprises a light output surface and an end face, air holes are formed in the end face, and air enters the first heat dissipation channel and the second heat dissipation channel through the air holes.

Optionally, the first air inlet hole projects to an area occupied by the end face in the axial direction of the LED lamp to form a first portion, and other areas on the end face form a second portion, and the area of the air hole on the first portion is larger than the area of the air hole on the second portion.

Optionally, the weight of the heat sink accounts for more than 50% of the weight of the LED lamp, and the volume of the heat sink accounts for more than 20% of the volume of the LED lamp.

Optionally, the volume of the heat sink accounts for 20% to 60% of the total volume of the LED lamp.

Optionally, a gap is formed between the outer peripheral wall of the lamp shade and the heat dissipation base, a hole is formed in the heat dissipation base, one side of the hole is communicated with the gap, the other side of the hole corresponds to the heat dissipation fins, air can enter from the gap and reaches the heat dissipation fins through the hole, and therefore a fourth heat dissipation channel is formed.

The present invention also provides an LED lamp, comprising:

the lamp shell comprises an inner cavity;

the passive heat dissipation assembly comprises a heat sink, the heat sink comprises heat dissipation fins and a heat dissipation base, and the heat dissipation fins are connected with the lamp shell;

the power supply is positioned in the inner cavity of the lamp shell;

the ratio of the power (watt) of the LED lamp to the heat dissipation area (square centimeter) of the radiator is 1: 20-30.

Optionally, the ratio of the power (watt) of the LED lamp to the heat dissipation area (square centimeter) of the heat sink is 1: 22-26.

Optionally, the weight of the LED lamp is less than 1.7 kg; when the LED lamp is supplied with electric energy of less than 300 watts, the LED chip is lightened and emits luminous flux of at least 25000 lumens.

Optionally, the weight of the heat sink is less than 1.2 kg.

The invention has the beneficial effects that: compared with the prior art, the invention comprises any one or any combination of the following effects:

(1) Through the setting of first heat dissipation channel, can this take away the heat in the first heat dissipation channel (the power during operation produces, through the setting of second heat dissipation channel, multiplicable convection heat dissipation to the radiator, and through the setting of first heat dissipation channel and second heat dissipation channel, the efficiency of whole lamp natural convection has been increased, and is limited at whole lamp weight, consequently can't be to the heat dissipation demand of high-power, big lumen's LED lamp and set up the condition of the radiator of corresponding weight, can guarantee the heat dissipation of the LED lamp of high-power, big lumen.

(2) The third opening is communicated with the first heat dissipation channel and the second heat dissipation channel respectively, the third opening is arranged in the area of the center of the lamp panel, and the third opening is arranged in the area of the center of the lamp panel, so that the first air inlet hole and the second air inlet hole can share one air inlet, therefore, the area of the lamp panel with the LED chips can be prevented from being occupied too much, and the area of the lamp panel with the LED chips is prevented from being reduced due to the fact that a plurality of holes are formed.

(3) The weight of the radiator accounts for more than 50% of the weight of the LED lamp, the volume of the radiator accounts for more than 20% of the total volume of the LED lamp, and under the condition that the heat conductivity coefficient of the radiator is the same, the larger the volume of the radiator is, the larger the area of the radiator can be used for radiating heat. Therefore, to the extent that the volume of the heat sink occupies more than 20% of the total volume of the LED lamp, the heat sink can have more available space to increase its heat dissipation area.

(4) The area of the air holes in the first part is larger than that of the air holes in the second part, so that most of air can enter the first heat dissipation channel, the power supply can be better cooled, and the electronic assembly of the power supply is prevented from being heated and aging rapidly.

Drawings

Fig. 1 is a schematic front view of an LED lamp in this embodiment;

FIG. 2 is a schematic cross-sectional view of the LED lamp of FIG. 1;

FIG. 3 is an exploded schematic view of the LED lamp of FIG. 1;

FIG. 4 is a schematic cross-sectional view of an LED lamp showing a first heat dissipation channel and a second heat dissipation channel;

FIG. 5 is a schematic perspective view I of the LED lamp of FIG. 1;

FIG. 6 is a schematic view of the light output surface of FIG. 5 with the light output surface removed;

FIG. 7 is an exploded schematic view of an LED lamp in some embodiments, showing a light barrier ring;

fig. 8 is a schematic view of an end face of the lamp cover in the present embodiment;

FIGS. 9 a-9 g are schematic views of lampshades in some embodiments;

fig. 10 is a top view of the heat sink in the present embodiment;

FIG. 11 is an enlarged schematic view at E of FIG. 10;

fig. 12 is a schematic view of air swirling at the second radiator fin;

FIG. 13 is a bottom view of the LED lamp of FIG. 1 with the lamp housing removed;

FIG. 14 is a sectional view of an LED lamp in this embodiment;

FIG. 15 is an enlarged schematic view at C of FIG. 14;

Fig. 16 is a schematic perspective view of the lamp cover in the present embodiment;

FIG. 17a is a first perspective view of the power supply of the present embodiment;

FIG. 17b is a second perspective view of the power supply of the present embodiment;

FIG. 17c is a perspective view of the power supply of this embodiment;

fig. 17d is a front view of the power supply in this embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Fig. 1 is a front view of an LED lamp in an embodiment of the present invention. Fig. 2 is a cross-sectional view of the LED lamp of fig. 1. Fig. 3 is an exploded view of fig. 1. As shown in fig. 1, 2 and 3, the LED lamp includes: radiator 1, lamp body 2, lamp plate 3, lamp shade 4 and power 5. In this embodiment, lamp plate 3 is connected on radiator 1 with the mode of laminating to do benefit to the heat that lamp plate 3 during operation produced and conduct to radiator 1 fast. In this embodiment, the heat sink 1 is connected to the lamp housing 2, the lamp shade 4 covers the lamp panel 3, so that light generated by the light source of the lamp panel 3 is emitted through the lamp shade 4, the power source 5 is located in the inner cavity of the lamp housing 2, and the power source 5 is electrically connected to the LED chip 311 to supply power to the LED chip 311.

As shown in fig. 4, a sectional view of the LED lamp in the present embodiment is shown. As shown in fig. 2 and 4, a first heat dissipating channel 7a is formed in the inner cavity of the lamp housing 2 in the present embodiment, and the first heat dissipating channel 7a has a first air inlet 2201 at one end of the lamp housing 2, and a heat dissipating hole 222 (specifically, opened at the upper portion of the neck 22) at the opposite end of the lamp housing 2. Air enters through the first air inlet 2201 and is exhausted through the heat dissipation hole 222, so that heat (mainly generated by the power supply 5 during operation) in the first heat dissipation channel 7a can be taken away. Specifically, in terms of the heat dissipation path, heat generated by the heating component in the power supply 5 during operation is firstly transferred to the air in the first heat dissipation channel 7a (air near the heating component) in a heat radiation manner, and the external air enters the first heat dissipation channel 7a in a convection manner, so as to take away the internal air for heat dissipation.

As shown in fig. 1, 2 and 4, a second heat dissipation channel 7b is formed in the heat dissipation fins 11 and the heat dissipation base 13, the second heat dissipation channel 7b has a second air inlet hole 1301, and air enters from the second air inlet hole 1301, passes through the second heat dissipation channel 7b, and finally flows out from the space between the heat dissipation fins 11. Therefore, the heat on the heat dissipation fins 11 can be taken away, and the heat dissipation of the heat dissipation fins 11 is accelerated. Specifically, in the heat dissipation path, heat generated by the LED chip 311 is conducted to the heat sink 1, the heat dissipation fins 11 of the heat sink 1 radiate the heat to the ambient air, and the second heat dissipation channel 7b carries away the air in the heat sink 1 for heat dissipation when performing convection heat dissipation.

As shown in fig. 1 and 4, the heat sink 1 is provided with a third heat dissipation channel 7c, the third heat dissipation channel 7c is formed between two heat dissipation fins 11 or a space between two sheets extended from the same heat dissipation fin 11, a radial outer side portion between the two heat dissipation fins 11 forms an inlet of the third heat dissipation channel 7c, and air enters the third heat dissipation channel 7c from a region on the radial outer side of the LED lamp and takes away heat radiated from the heat dissipation fins 11 to the air.

Fig. 5 is a schematic perspective view of the LED lamp in this embodiment, showing the combination of the heat sink 1 and the lamp cover 4. Fig. 6 is a schematic view of the structure of fig. 5 with the light output surface 43 removed. As shown in fig. 5 and 6, in the present embodiment, the lamp housing 4 includes a light output surface 43 and an end surface 44, the end surface 44 is provided with ventilation holes 41, and air enters the first heat dissipation channel 7a and the second heat dissipation channel 7b through the ventilation holes 41. When the LED chip 311 (shown in fig. 6) emits light, light passes through the light output surface 43 and exits the lamp housing 4. In this embodiment, the light output surface 43 can be made of a transparent material in the prior art, such as glass, PC material, etc. In all embodiments of the present invention, the term "LED chip" generally refers to all light sources using LEDs (light emitting diodes) as main bodies, including but not limited to LED lamp beads, LED lamp strips, or LED filaments, and therefore, the LED chip groups referred to in this specification may also be equivalent to LED lamp bead groups, LED lamp strip groups, or LED filament groups.

As shown in fig. 5 and fig. 6, in this embodiment, an internal reflection surface 4301 is disposed on the light output surface 43 of the lampshade 4 on the inner side in the radial direction of the LED lamp, the internal reflection surface 4301 is opposite to the LED chips 311 on the lamp panel 3, and the internal reflection surface 4301 is opposite to any one of the LED chips 311 and is located on the inner side in the radial direction of the LED lamp. In one embodiment, the light output surface 43 is provided with an outer reflecting surface 4302 at the outer side of the LED lamp in the radial direction, the outer reflecting surface 4302 is opposite to the LED chip 311 on the lamp panel 3, and the outer reflecting surface 4302 is located at the outer side of the LED lamp in the radial direction relative to any one of the LED chips 311. The inner reflecting surface 4301 and the outer reflecting surface 4302 are configured to adjust a light emitting range of the LED chip set 31, so as to concentrate light, thereby improving a local brightness, that is, under the condition of the same luminous flux, improving an illuminance of the LED lamp.

As shown in fig. 8, the maximum inscribed circle diameter of the airing hole 41 is less than 2mm, preferably 1 to 1.9 mm. In this way, on one hand, insects can be prevented from entering and most of dust can be prevented from passing through, and on the other hand, the air holes 41 can keep good air circulation efficiency. In other words, the vent 41 may define a length direction and a width direction, that is, the vent has a length and a width, the length dimension is greater than the width dimension, and the width of the widest portion of the vent is less than 2mm, and in one embodiment, the width of the widest portion is 1mm to 1.9 mm. In addition, the maximum width of the ventilation holes 41 is greater than 1mm, and if it is less than 1mm, the air needs a greater pressure to enter the ventilation holes 41, and thus, the ventilation is not facilitated.

Fig. 9a to 9g show the shape of various vents 41 in some embodiments. As shown in fig. 9a to 9g, the ventilation holes 41 may be formed in a shape of one or a combination of a plurality of circular, elongated, arc, trapezoid, or diamond shapes. As shown in fig. 9a, if the air holes 41 are circular, their diameter is less than 2mm, so as to prevent insects from entering, prevent most dust from passing through, and maintain good air circulation efficiency. As shown in fig. 9b and 9c, if the air holes 41 are in the shape of a long strip or an arc, the width thereof is less than 2mm, so as to achieve the above technical effects. As shown in FIG. 9d, if the air holes 11d are trapezoidal, the bottom of the air holes is smaller than 2mm, so as to achieve the above technical effects. As shown in fig. 9e, if the ventilation holes 41 are rectangular with rounded corners, the width is less than 2mm, so as to achieve the above technical effects. As shown in FIGS. 9f and 9g, the air holes 41 may be triangular or drop-shaped, and the maximum inscribed circle thereof is smaller than 2 mm.

Taking fig. 9a as an example, in fig. 9a, two dotted lines are provided on the end surface 44, the dotted line of the inner ring represents the position of the first air inlet hole 2201 projected onto the end surface 44, the area inside the dotted line of the inner ring is a first portion (a first opening area 433), the area between the outer ring and the inner ring is a second portion (a second opening area 434), in this embodiment, the area occupied by the first air inlet hole 2201 projected onto the end surface 44 in the axial direction of the LED lamp forms the first portion (the first opening area 433), while the other area on the end surface 44 forms the second portion (the second opening area 434), and the area of the air vent 41 on the first portion is larger than the area of the air vent 41 on the second portion. This kind of arrangement, do benefit to and make most air get into first heat dissipation channel 7a to better dispel the heat to power 5, prevent that the electronic component of power 5 from being heated and ageing with higher speed. The above-described features are also applicable to the ventilation holes 41 in the other embodiments described above.

In some applications, there may be weight limitations for the entire LED lamp. For example, when an E39 base is used for an LED lamp, the maximum weight of the LED lamp is limited to within 1.7 kg. Thus, the weight of the heat sink is limited to within 1.2 kg in some embodiments after removing components such as the power supply, lamp housing, etc. For some high power LED lamps, the power is 150W-300W, and the lumen count can reach about 20000 to 45000 lumens, i.e., the heat sink needs to dissipate the heat generated from the 20000 to 45000 lumen generating LED lamps within its weight limit. In the case of natural convection heat dissipation, a heat dissipation area of 35 cm square or more is generally required for 1W power. The following embodiments are designed to reduce the heat dissipation area required by 1W power while ensuring the installation space and heat dissipation effect of the power supply 5, and further achieve the best heat dissipation effect under the premise of the weight limitation of the heat sink 1 and the limitation of the power supply 5.

As shown in fig. 1 and fig. 2, in the present embodiment, the LED includes or only includes a passive heat dissipation assembly, which only uses natural convection and radiation to dissipate heat, but does not use an active heat dissipation assembly, such as a fan. The passive heat dissipation assembly in this embodiment includes a heat sink 1, the heat sink 1 includes heat dissipation fins 11 and a heat dissipation base 13, the heat dissipation fins 11 are radially and uniformly distributed along the circumference of the heat dissipation base, and are connected to the heat dissipation base 13. When the LED lamp is used, the heat generated by the LED chip 311 conducts at least a portion of the heat to the heat sink 1 in a heat conduction manner, and at least a portion of the heat sink 1 is dissipated to the outside air by heat radiation and convection. The diameter of the radially outer contour of the heat sink 1 decreases or substantially decreases in the height direction. Therefore, the lamp can be better matched with the lamp. When the heat sink 1 in this embodiment dissipates heat, at least part of the heat is dissipated by radiating the heat to the surrounding air.

In this embodiment, under the condition of passive heat dissipation (without fan), the ratio of the power (watt) of the LED lamp to the heat dissipation area (square centimeter) of the heat sink 1 is 1: 20-30, that is, each tile needs a heat dissipation area of 20-30 square centimeters for heat dissipation. Preferably, the ratio of the power of the LED lamp to the heat dissipation area of the heat sink 1 is 1: 22-26. More preferably, the ratio of the power of the LED lamp to the heat dissipation area of the heat sink 1 is 25. A first heat dissipation channel 7a is formed in the inner cavity of the lamp housing 2, and the first heat dissipation channel 7a has a first air inlet 2201 at one end of the lamp housing 2, and a heat dissipation hole 222 is formed at the opposite end of the lamp housing 2. Air enters from the air inlet 2201 and is discharged from the heat dissipation hole 222, so that heat in the first heat dissipation channel 7a can be taken away. A second heat dissipation channel 7b is formed in the heat dissipation fins 11 and the heat dissipation base 13, the second heat dissipation channel 7b is provided with a second air inlet hole 1301, and air enters from the second air inlet hole 1301, passes through the second heat dissipation channel 7b, and finally flows out from the space between the heat dissipation fins 11. Therefore, the heat radiated to the surrounding air by the heat dissipation fins 11 can be taken away, and the heat dissipation of the heat dissipation fins 11 is accelerated. Through the arrangement of the first heat dissipation channel 7a and the second heat dissipation channel 7b, the efficiency of natural convection is increased, the corresponding required heat dissipation area of the heat sink 1 is reduced, and the ratio of the power of the LED lamp to the heat dissipation area of the heat sink 1 is 20-30. In this embodiment, the weight of the whole LED lamp is less than 1.7kg, and when the LED lamp is supplied with about 200W (300W or less, preferably 250W or less), the LED chip 311 is turned on and emits at least 25000 lumens.

As shown in fig. 1, in the present embodiment, the weight of the heat sink 1 accounts for more than 50% of the weight of the LED lamp, in some embodiments, the weight of the heat sink 1 accounts for 55-65% of the weight of the LED lamp, and at this time, the volume of the heat sink 1 accounts for more than 20% of the total volume of the LED lamp, and under the condition that the thermal conductivity coefficients of the heat sinks 1 are the same (that is, the heat sinks 1 are made of the same material as a whole, or two different materials with the same thermal conductivity coefficients are used), the larger the volume of the heat sink 1 is, the larger the area of the heat sink 1 can be used for heat dissipation. Therefore, to a certain extent, when the volume of the heat sink 1 occupies more than 20% of the total volume of the LED lamp, the heat sink 1 can have more available space to increase its heat dissipation area. After the arrangement space of the power supply 5, the lampshade 4 and the lamp housing 2 is considered, preferably, the volume of the radiator 1 accounts for 20% -60% of the total volume of the LED lamp, and more preferably, the volume of the radiator 1 accounts for 25% -50% of the total volume of the LED lamp, so that when the overall size of the LED lamp is limited and the arrangement space of the power supply 5, the lampshade 4 and the lamp housing 2 needs to be ensured, the volume of the radiator 1 is maximized, and the design of the overall heat dissipation of the LED lamp is facilitated.

As shown in fig. 10, under the limitation of the above volume of the heat sink 1, at least a portion of the heat dissipating fins 11 extends outward in the radial direction of the LED lamp to form at least two sheets, the two sheets are arranged at intervals, so that the heat dissipating fins 11 have a larger heat dissipating area in a fixed space, and in addition, the two extended sheets support the heat dissipating fins 11, so that the heat dissipating fins 11 are more stably supported on the heat dissipating base 13, and the heat dissipating fins 11 are prevented from deflecting.

Specifically, as shown in fig. 10, the heat dissipation fins 11 include first heat dissipation fins 111 and second heat dissipation fins 112, the bottom portions of the first heat dissipation fins 111 and the second heat dissipation fins 112 in the axial direction of the LED lamp are connected to the heat dissipation base 13, and the first heat dissipation fins 111 and the second heat dissipation fins 112 are alternately arranged at intervals. The second heat dissipating fins 112 are Y-shaped, and the second heat dissipating fins 112 are divided into two, so that the heat sink 1 has more heat dissipating areas while occupying the same volume. In this embodiment, the first heat dissipation fins 111 and the second heat dissipation fins 112 are disposed at intervals, each first heat dissipation fin 111 is uniformly distributed on the circumference, each second heat dissipation fin 112 is uniformly distributed on the circumference, and two adjacent second heat dissipation fins 112 are symmetrically disposed with one first heat dissipation fin 111. In this embodiment, the distance between the first heat dissipation fins 111 and the second heat dissipation fins 112 is 8-12 mm, and in order to make the air in the heat sink 1 smoothly circulate and further make the heat sink 1 exert the maximum heat dissipation effect, the distance between the heat dissipation fins should be designed to be uniform.

As shown in fig. 10, at least one heat dissipation fin 11 is divided into two parts in the radial direction of the LED lamp, and the two parts are spaced apart from each other, so that a flow channel is formed at the space, so that air can be convected at the space. In addition, when the above-mentioned gap is projected to the lamp panel 3 in the axial direction of the LED lamp, the position of the above-mentioned gap corresponds to the region on the lamp panel 3 where the LED chip 311 is disposed, so that the increased convection current at this position can improve the heat dissipation effect on the LED chip 311. From the viewpoint of the limited overall weight of the LED lamp, the heat dissipation bass piece 11 is arranged at intervals, so that the amount of the heat dissipation bass piece 11 is reduced, the overall weight of the heat sink 1 is reduced, and an extra design space is provided for other parts of the LED lamp.

Fig. 11 is an enlarged schematic view at E in fig. 10. As shown in fig. 10 and 11, specifically, the heat dissipating fins 11 include first heat dissipating fins 111 and second heat dissipating fins 112, and the first heat dissipating fins 111 are divided into two parts, i.e., a first part 111a and a second part 111b, in the radial direction of the LED lamp, and the two parts are spaced apart from each other in the radial direction of the LED lamp, and a space 111c is formed at the space. The first portion 111a is located radially inward of the second portion 111 b. The second radiator fin 112 has a third portion 112a and a fourth portion 112b, the fourth portion 112b extends from the third portion 112a, the position of the fourth portion 112b in the circumferential direction is changed compared with the third portion 112a, and the fourth portion 112b is located at the radial outer side of the heat sink 1 relative to the third portion 112a, so as to improve the space utilization rate, and thus, the area of the radiator fin 11 capable of dissipating heat is increased. As shown in fig. 11, the third portion 112a and the fourth portion 112b are connected by a transition section 113, the transition section 113 has a buffer section 113a and a guide section 113b, the buffer section 113a and the guide section 113b are both arc-shaped, and both form an "S" shape or an inverted "S" shape. The buffer section 113a is disposed to prevent air from forming a vortex when the air is convected radially outward on the surface of the second heat dissipating fin 112 as shown in fig. 12, and further prevent the convection, but the guide section 113b guides the convected air to continuously flow radially outward along the surface of the second heat dissipating fin 112.

As shown in fig. 11, a second radiator fin 112 includes a third portion 112a and two fourth portions 112b, and the two fourth portions 112b are symmetrically disposed with the third portion 112a as a symmetry axis. In other embodiments, a second heat sink fin 112 may also include a third portion 112a and a plurality of fourth portions 112b, such as three or four fourth portions 112b (not shown), and the fourth portions 112b of the second heat sink fin 112 on two sides of the LED lamp in the circumferential direction are adjacent to the first heat sink fins 111.

As shown in fig. 11, the direction pointed by any tangent of the guiding section 113b is offset from the spacer 111c, so as to prevent the convective air from entering the spacer 111c through the guiding section 113b, so that the convective path is lengthened to affect the heat dissipation efficiency. Preferably, a direction in which any tangent line of the guide section 113b is directed is located radially outward of the spacer 111 c. In other embodiments, at least a part of the tangent line of the guide segment 113b is directed in a direction radially inward of the spacer 111 c.

As shown in fig. 15, the heat sink base 13 has a first inner surface 136, the globe 4 has an outer peripheral wall 45, and after the globe 4 is correctly mounted on the LED lamp, the first inner surface 136 corresponds to the outer peripheral wall 45 of the globe 4 (the outer side in the radial direction of the globe 4), and a gap is maintained between the first inner surface 136 and the outer peripheral wall 45, so that the globe 4 is prevented from being thermally expanded due to heat generation and being pressed by the first inner surface 136 to be damaged when the LED lamp is operated. By maintaining the gap between the first inner surface 136 and the outer peripheral wall 45, the above-described squeezing can be reduced or avoided.

As shown in fig. 15, the first inner surface 136 is an inclined surface, which forms an included angle with the lamp panel 3, and the included angle may be an obtuse angle. Therefore, when the globe 4 thermally expands and the outer peripheral wall 45 abuts against the inclined surface, the pressing force of the first inner surface 136 against the radially outer side of the globe 4 is decomposed into a downward component and a horizontal component, which contributes to reduction of the pressing force of the globe 4 in the horizontal direction (the pressing force in the horizontal direction, which is a factor of breakage of the globe 4).

As shown in fig. 15, the heat dissipation base 13 further has a second inner surface 137, the globe 4 has an outer peripheral wall 45, the outer peripheral wall 45 maintains a gap with the first inner surface 136, an end of the outer peripheral wall 45 abuts against the second inner surface 137, an included angle between the first inner surface 136 and the lamp panel 3 is smaller than an included angle between the second inner surface 137 and the lamp panel 3, that is, the second inner surface 137 is flatter than the first inner surface 136, so that when the end of the outer peripheral wall 45 abuts against the second inner surface 137, and the globe 4 expands due to heat, the second inner surface 137 presses the globe 4 less horizontally.

As shown in fig. 16, the end of the outer peripheral wall 45 is provided with the protruding wall 451, the protruding walls 451 are arranged at intervals in the circumferential direction of the outer peripheral wall 45, the protruding wall 451 is a portion of the end of the outer peripheral wall 45 actually contacting the second inner surface 137, and by the arrangement of the protruding wall 451, the contact area between the outer peripheral wall 45 of the lamp housing 4 and the heat dissipation base 13 can be reduced, so that the heat of the heat sink 1 is prevented from being conducted to the lamp housing 4, and the temperature of the lamp housing 4 is prevented from being too high.

As shown in fig. 14 and 15, a gap is formed between the outer peripheral wall 45 of the lamp housing 4 and the heat dissipating base 13, and the heat dissipating base 13 is provided with a hole, one side of the hole is communicated with the gap, and the other side of the hole corresponds to the heat dissipating fins 11, that is, air can enter from the gap and reach the heat dissipating fins 11 through the hole, so as to increase convection and convection path, which can form the fourth heat dissipating channel 7d of the LED lamp of the present embodiment as shown by the arrow in fig. 15. At this time, since the convex walls 451 are arranged at intervals in the circumferential direction of the outer circumferential wall 45, air can pass through the gaps between the convex walls 451, thereby completing the above-mentioned convection.

As shown in fig. 13, in this embodiment, the lamp panel 3 includes at least one LED chip set 31, and the LED chip set 31 includes an LED chip 311.

As shown in fig. 13, in the present embodiment, the lamp panel 3 is divided into an inner circumference, a middle circumference and an outer circumference in the radial direction, and the LED chip sets 31 are correspondingly disposed on the inner circumference, the middle circumference and the outer circumference, that is, the inner circumference, the middle circumference and the outer circumference are all provided with the corresponding LED chip sets 31. In another aspect, the lamp panel 3 includes three LED chip sets 31, and the three LED chip sets 31 are respectively disposed on the inner periphery, the middle periphery and the outer periphery of the lamp panel 3. The LED chip groups 31 on the inner, middle and outer circumferential rings each include at least one LED chip 311. As shown in fig. 13, 4 broken lines are defined, the range defined between the outermost two broken lines is the range of the outer circumference, the range defined between the innermost two broken lines is the range of the inner circumference, and the range defined between the middle two broken lines is the range of the middle circumference. In other embodiments, the lamp panel 3 may be divided into two circles, and the LED chip set 31 is correspondingly disposed in the two circles.

As shown in fig. 4 and 7, the lamp panel 3 is provided with a third opening 32, and the third opening 32 is respectively communicated with the first heat dissipation channel 7a and the second heat dissipation channel 7b, that is, the third opening 32 is simultaneously communicated with the space between the heat dissipation fins 11 of the heat sink 1 and the cavity of the lamp housing 2, so that the space between the heat dissipation fins 11 and the cavity of the lamp housing 2 form an air convection path with the outside of the LED lamp. The third opening 32 is located further inside the inner circumference in the radial direction of the LED lamp. Therefore, the space of the light reflection area 3001 is not occupied, and the reflection efficiency is not affected. Specifically, the third opening 32 is disposed in a central area of the lamp panel 3, and the first air inlet hole 2201 and the second air inlet hole 1301 are respectively provided with air from the same opening (the third opening 32), that is, the convective air enters the first air inlet hole 2201 and the second air inlet hole 1301 after passing through the third opening 32. The third opening 32 is provided in the center of the lamp panel 3, so that the first air inlet hole 2201 and the second air inlet hole 1301 can share one air inlet, and therefore, the occupation of an excessive area of the lamp panel 3 can be avoided, and the area of the lamp panel 3 where the LED chip 311 is provided is reduced by providing a plurality of holes. On the other hand, since the inner case 21 corresponds to the third opening 32, the convective air plays a role of heat insulation at the time of air intake, that is, prevents the temperatures inside and outside the inner case 21 from affecting each other.

Fig. 17a to 17c are perspective views of the power supply 5 in this embodiment in various directions, and fig. 17d is a front view of the power supply 5 in this embodiment. The power supply 5 is electrically connected to the LED chip 311 and is used to supply power to the LED chip 311. As shown in fig. 17a to 17c, the power supply 5 includes a power supply board 51 and electronic components provided on the power supply board 51.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims

1. An LED lamp, comprising:

A lamp housing;

the power supply is positioned in the lamp shell;

the LED lamp adopts an E39 lamp cap, and the weight of the LED lamp is less than 1.7 kg;

when the LED lamp is supplied with electric energy of less than 300 watts, the LED chip is lightened, and luminous flux of at least 25000 lumens is emitted;

the radiating fins comprise a first radiating fin and a second radiating fin, the first radiating fin comprises a first part and a second part, the first part and the second part are arranged at intervals in the radial direction of the LED lamp, a spacing area is formed at the spacing position, the second radiating fin comprises a third part and a fourth part, the third part and the fourth part are connected through a transition section, the transition section comprises a buffer section and a guide section, and the direction pointed by any tangent line of the guide section is staggered with the spacing area.

2. The LED lamp of claim 1, wherein the LED chip is illuminated and emits at least 25000 lumens when less than 250 watts of power is supplied to the LED lamp.

3. The LED lamp of claim 1, wherein said LED chip is illuminated and emits at least 25000 lumens when 200 watts of power is supplied to said LED lamp.

4. The LED lamp of claim 1, wherein the weight of the heat sink is less than 1.2 kg.

5. The LED lamp of claim 1, wherein the first heat dissipation channel has a first air inlet hole at one end of the lamp housing and a heat dissipation hole at an opposite end of the lamp housing, the first heat dissipation channel dissipating heat from the power supply by a chimney effect during convection.

6. The LED lamp of claim 5, wherein said second heat dissipation channel has a second air inlet hole, and air enters from said second air inlet hole, passes through said second heat dissipation channel, and finally flows out from the space between said heat dissipation fins.

7. The LED lamp of claim 6, wherein the lamp panel defines a third opening, and the third opening is respectively communicated with the first heat dissipation channel and the second heat dissipation channel.

8. The LED lamp of claim 7, wherein the third opening is disposed in a central region of the lamp panel, and the first and second air inlets are respectively open to the third opening.

9. The LED lamp of claim 6, further comprising a cover, the cover including a light output surface and an end surface, the end surface having air vents therein through which air enters the first and second heat dissipation channels.

10. The LED lamp of claim 9, wherein an area occupied by the first air inlet hole projected to the end surface in the axial direction of the LED lamp forms a first portion, and other areas on the end surface form a second portion, and an area of the air vent on the first portion is larger than an area of the air vent on the second portion.

11. The LED lamp of claim 1, wherein the weight of the heat sink is greater than 50% of the weight of the LED lamp and the volume of the heat sink is greater than 20% of the volume of the LED lamp as a whole.

12. The LED lamp of claim 11, wherein the volume of the heat sink is 20% to 60% of the volume of the LED lamp as a whole.

13. The LED lamp of claim 9, wherein a gap is formed between the outer peripheral wall of the lamp housing and the heat sink base, and the heat sink base is formed with a hole, one side of the hole communicates with the gap and the other side corresponds to the heat sink fins, and air can enter from the gap and pass through the hole to the heat sink fins, thereby forming a fourth heat sink channel.

14. An LED lamp, comprising:

the lamp shell comprises an inner cavity;

the power supply is positioned in the inner cavity of the lamp shell;

the first heat dissipation channel is formed in the inner cavity of the lamp housing; and

the LED lamp adopts an E39 lamp cap, the weight of the LED lamp is less than 1.7kg,

the ratio of the power tile of the LED lamp to the square centimeter of the heat dissipation area of the radiator is 1: 20-30;

15. The LED lamp of claim 14, wherein the ratio of the power tile of the LED lamp to the heat dissipation area of the heat sink is 1: 22-26.

16. The LED lamp of claim 14, wherein the LED lamp weighs less than 1.7 kg; when the LED lamp is supplied with electric energy of less than 300 watts, the LED chip is lightened, and luminous flux of at least 25000 lumens is emitted.

17. The LED lamp of claim 16, wherein the LED chip is illuminated and emits at least 25000 lumens when less than 250 watts of power is supplied to the LED lamp.

18. The LED lamp of claim 16, wherein the LED chip is illuminated and emits at least 25000 lumens when 200 watts of power is supplied to the LED lamp.

19. An LED lamp as claimed in any one of claims 14 to 18 wherein the weight of the heat sink is less than 1.2 kg.

20. The LED lamp of claim 14, wherein the first heat dissipation channel has a first air inlet hole at one end of the lamp housing and a heat dissipation hole at an opposite end of the lamp housing, the first heat dissipation channel dissipating heat from the power supply by a chimney effect during convection.

21. The LED lamp of claim 20, wherein said second heat dissipation channel has a second air intake hole, and air enters through said second air intake hole, passes through said second heat dissipation channel, and finally flows out from the space between said heat dissipation fins.

22. The LED lamp of claim 21, wherein the lamp panel defines a third opening, the third opening being in communication with the first heat sink channel and the second heat sink channel, respectively.

23. The LED lamp of claim 22, wherein the third opening is disposed in a central region of the lamp panel, and the first and second air inlets are respectively open to the atmosphere from the third opening.

24. The LED lamp of claim 21, further comprising a cover, the cover including a light output surface and an end surface, the end surface having air vents therein through which air enters the first and second heat dissipation channels.

25. The LED lamp of claim 24, wherein an area occupied by the first air inlet hole projected to the end surface in the axial direction of the LED lamp forms a first portion, and other areas on the end surface form a second portion, and an area of the air vent on the first portion is larger than an area of the air vent on the second portion.

26. The LED lamp of claim 24, wherein a gap is provided between the outer peripheral wall of the lamp housing and the heat sink base, and the heat sink base is formed with a hole having one side communicating with the gap and the other side corresponding to the heat sink fins, and wherein air can enter the gap and pass through the hole to the heat sink fins, thereby forming a fourth heat sink channel.