CN210372924U

CN210372924U - Heat convection heat dissipation structure, LED lamp and lamp

Info

Publication number: CN210372924U
Application number: CN201921308347.7U
Authority: CN
Inventors: 梁鹏举
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-04-21
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a thermal convection heat radiation structure, LED lamp and lamps and lanterns. The heat convection radiating structure comprises a lamp shell, a lamp bead plate arranged at the bottom of the lamp shell and a light-transmitting lamp shade used for shielding a bottom opening of the lamp shell; the lamp also comprises a convection channel communicated with the external space, and the convection channel penetrates through the lamp shell, the lamp bead plate and the light-transmitting lamp shade; the side wall of the lamp housing is closed, and the top of the lamp housing is provided with a plurality of first through holes so that the top end of the convection channel is communicated with the external space.

Description

Heat convection heat dissipation structure, LED lamp and lamp

Technical Field

The utility model relates to a LED heat dissipation technical field specifically is a heat convection heat radiation structure, LED lamp and lamps and lanterns.

Background

The light attenuation and lifetime of LEDs are directly affected by their junction temperature, so that heat dissipation of LEDs is also one of the research hotspots in the field. At present, the heat dissipation mode of a high-power LED bulb mainly comprises the following steps:

1. the aluminum heat sink fins are used as a part of the housing to increase the heat dissipation area. The heat on the aluminum heat dissipation fins is dissipated to the outside in a heat exchange mode with air, but the cost is high.

2. A small-sized radiating fan is additionally arranged on the basis of the aluminum radiating fins; the heat radiation fan is used for assisting in increasing air convection around the heat radiator, and further improving the heat radiation efficiency of the heat radiator. LED bulbs are more costly.

3. According to the air hydrodynamics principle, utilize the structure of LED lamp body, produce the convection current air in order to take away the heat and dispel the heat. But the existing product has complex structure and complicated production steps; for example, some products adopt two heat dissipation modes of heat convection and heat conduction of a radiator, but the cost is high and the assembly is complicated; and some products have unreasonable design and unsatisfactory heat dissipation effect.

For example, the Chinese utility model patent with publication number CN203249216U, gas convection heat dissipation structure of LED bulb, comprises a radiator, an insulation connecting sleeve, a shade-proof sleeve, a lampshade and a lampshade top cover; the radiator is internally provided with a cavity and radiating fins and forms a plurality of channels for air circulation; the LED lamp panel is installed on the outer wall of radiator cavity, is equipped with the clearance of cavity circulation between radiator and insulating adapter sleeve, radiator and lamp shade, lamp shade and lamp shade top cap, lamp shade top cap and prevent the shadow cover. The utility model discloses a through the wind channel opening of internal heat convection current of clearance formation, its heat convection current effect is lower, and the inner structure is more complicated than current product.

For example, the chinese utility model patent publication No. CN202040777U, entitled "heat dissipation structure for accelerating heat convection effect", includes a base, a heat sink, and a cover. The heat dissipation body is arranged in the base body and comprises a hollow cylindrical column and a plurality of heat dissipation fins. One side of the hollow cylinder is provided with a first convection hole, and the other side is provided with a second convection hole. The seat body is provided with an opening and a plurality of heat dissipation holes, and the cover covers the opening of the seat body and is provided with a plurality of through holes. The utility model discloses a plurality of openings of heat dissipation shroud are the annular design, and the circuitous book of inside convection current passageway to do not do benefit to the heat dissipation.

SUMMERY OF THE UTILITY MODEL

The heat radiation structure in order to overcome above-mentioned current LED bulb heat convection has a great deal of technical defect, the utility model provides a heat convection heat radiation structure, LED lamp and lamps and lanterns. The utility model discloses a heat convection heat radiation structure utilizes the chimney effect to form the radiating effect of strong convection current, and need not the use of aluminium radiator, practices thrift the cost.

In order to solve the above problem, the utility model discloses realize according to following technical scheme:

the utility model relates to a heat convection heat dissipation structure, which comprises a lamp shell, a lamp bead plate arranged at the bottom of the lamp shell and a light-transmitting lamp shade used for shielding a bottom opening of the lamp shell;

the lamp also comprises a convection channel communicated with the external space, and the convection channel penetrates through the lamp shell, the lamp bead plate and the light-transmitting lamp shade;

the side wall of the lamp housing is closed, and the top of the lamp housing is provided with a plurality of first through holes so that the top end of the convection channel is communicated with the external space.

Furthermore, a plurality of second through holes are formed in the light-transmitting lamp shade, and a plurality of hollow parts are arranged on the lamp bead plate, so that the bottom end of the convection channel is communicated with the external space.

Furthermore, a plurality of convex parts extend from the inner wall of the light-transmitting lampshade to the lamp bead plate, and the convex parts are of hollow columnar structures penetrating up and down;

the bottom opening of the protruding portion forms the second through hole, and the top opening of the protruding portion correspondingly abuts against the hollowed-out portion.

Through the design, the protruding part is of a hollow cylindrical structure penetrating from top to bottom, a small chimney structure is formed, and the convection of cold air and hot air is enhanced.

Furthermore, the periphery of the lamp bead plate is provided with a downward extending annular connecting part, and the annular connecting part is fixedly connected with the wall body of the lamp shell in a pressing mode.

Further, the lamp housing is a hollow housing made of metal with high thermal conductivity.

Furthermore, the light-transmitting lamp shade is provided with buckling parts, and buckling holes matched with the buckling parts are formed in the lamp bead plate.

Further, the top of the lamp housing is also provided with a lamp cap connected with the lamp holder, and the lamp cap and the first through hole are not interfered with each other.

Furthermore, the lamp cap comprises an insulated connector and a metal shell wrapping the outer wall of the top of the connector;

the connector has a hollow tube portion for receiving the LED driver.

The embodiment also provides an LED lamp which comprises the heat convection heat dissipation structure.

The utility model also provides a lamps and lanterns, this lamps and lanterns include the LED lamp, and this LED lamp is provided with foretell thermal convection heat radiation structure.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the heat convection structure of the utility model is different from the existing heat convection structure; the convection channel penetrates through the lamp shell, the lamp bead plate and the light-transmitting lampshade to be communicated with the external space. The convection current passageway forms one from bottom to top "chimney" structure, and the heat that produces on the lamp pearl board carries out the heat conduction to ambient air, and hot-air density is little, upwards discharges away along the top of the convection current passageway that has the vertical gradient (i.e. the first through-hole of lamp body), and new cold air supplyes the entering from the bottom of convection current passageway to this air flow nature of reinforcing heat convection heat radiation structure.

2. Current thermal convection structure only relies on the clearance of lamp pearl board and casing to carry out the convection current, and the middle part heat of lamp pearl board is concentrated, and the heat dissipation is difficult. And the utility model discloses a lamp pearl board is still worn to establish to the convection current passageway, causes the cold air of benefit-in to fully contact lamp pearl board and take away the heat on the lamp pearl board, makes the utility model discloses need not to add aluminium system radiator in the lamp body, overall structure is simple reasonable, and is with low costs.

3. In the existing heat convection heat dissipation lamp shell, a plurality of heat dissipation through holes are formed in the side wall of the lamp shell, so that the lamp shell is not suitable for outdoor harsh places such as rainwater splashing. And the utility model discloses a lateral wall of lamp body seals, and the closure is good, and in coordination light lampshade gives the fine rainwater-proof performance of heat convection heat radiation structure, can be applied to the illumination in outdoor lamps and lanterns or outdoor place.

Drawings

The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a thermal convection structure of the present invention;

fig. 2 is an exploded view of the components of the thermal convection structure of the present invention;

fig. 3 is a cross-sectional view of the heat convection structure of the present invention;

fig. 4 is a schematic perspective view of the lamp housing of the present invention;

fig. 5 is a schematic perspective view of the lamp bead plate of the present invention;

fig. 6 is a schematic perspective view of the light-transmitting lamp cover of the present invention;

fig. 7 is a schematic perspective view of another lamp bead plate of the present invention;

in the figure:

1-a lamp housing, 11-a first through hole;

2-a lamp bead plate, 21-a hollow part, 22-a buckling hole and 23-an annular connecting part;

3-a light-transmitting lampshade, 31-a second through hole, 32-a convex part, 33-a buckling part and 34-a step groove;

4-connector, 41-hollow pipe part, 42-third through hole.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1 to 7, it is a preferable structure of the heat convection structure according to the present invention.

As shown in fig. 2, the heat convection structure includes a lamp housing 1, a lamp bead plate 2, and a light-transmitting lamp cover 3.

The heat convection heat dissipation structure is further provided with a convection channel communicated with an external space, and the lamp shell 1, the lamp bead plate 2 and the light-transmitting lampshade 3 are penetrated through the convection channel.

Further, a lamp cap of the LED bulb, such as a screw lamp cap, a bayonet lamp cap, etc., is disposed at the top of the lamp housing 1. The lamp cap is a power supply component for connecting an external power supply, such as a lamp holder. The lamp shell 1 is a shell for connecting a lamp holder and a lampshade in the LED bulb and is mainly used for accommodating an LED driver. The light-transmitting lampshade 3 is one of the LED accessories, and the light-transmitting lampshade 3 shields the bottom opening of the lamp shell 1. The lamp bead plate 2 is a light source component integrated with LED lamp beads.

As shown in fig. 4, the side wall of the lamp housing 1 is closed, specifically, there is no opening, through hole, gap or clearance on the side wall of the lamp housing 1, and the side wall of the lamp housing 1 encloses and forms a hollow inner cavity. The bottom of the lamp shell 1 is provided with an opening, and the top of the lamp shell 1 is provided with a plurality of first through holes 11. The first through-hole 11 forms a top outlet of the convection passage to communicate a top end of the convection passage with the external space.

In one example, the lamp housing 1 is in a shape of an inverted cup, and the bottom of the lamp housing 1 is an opening. The actual structure of the lamp housing 1 is not limited in this embodiment, and based on the guidance of the present invention, a person skilled in the art can set the lamp housing 1 to be cylindrical, regular cube, or other beautiful shapes.

In one example, the lamp housing 1 is a hollow housing made of a metal with a high thermal conductivity coefficient, and can be made of copper, aluminum or aluminum alloy, which is beneficial to heat diffusion and heat dissipation of the lamp bead plate 2, and on the other hand, the lamp housing is convenient to process and low in cost. In this embodiment, the lamp housing 1 is preferably an aluminum housing.

As shown in fig. 6, the light-transmitting lamp housing 3 is a bowl-shaped structure with a hollow interior and an open top. The bottom of the light-transmitting lampshade 3 is provided with a second through hole 31, and the second through hole 31 forms a bottom inlet of a convection channel so as to perform heat convection heat dissipation. Specifically, the top of the light-transmitting lamp housing 3 is matched and butted with the bottom of the lamp housing 1 to shield the bottom opening of the lamp housing 1.

As shown in fig. 5, the outer contour of the bead plate 2 matches the bottom opening of the lamp housing 1. The lamp bead plate 2 is a circular ring plate, and the lamp bead plate 2 is arranged in an opening at the bottom of the lamp housing 1 and clamped between an inner cavity of the lamp housing 1 and a cavity of the light-transmitting lampshade 3. The lamp bead plate 2 is made of an aluminum substrate with high thermal conductivity, and the lamp bead plate 2 belongs to the prior art, and the description is omitted.

Further, the lamp bead plate 2 is a hollowed plate structure, a plurality of hollowed parts 21 for heat convection are arranged on the lamp cover plate, and the hollowed parts 21 enable the inner cavity of the lamp housing 1 to be communicated with the cavity of the light-transmitting lamp shade 3. Preferably, the hollowed-out portion 21 is disposed corresponding to the second through hole 31 of the light-transmitting lamp shade 3. The outline shape of the hollow portion 21 is not limited in this embodiment, and may be circular, elliptical, or the like.

In this embodiment, preferably, the circumference of the lamp bead plate 2 is provided with an annular connecting portion 23 extending downward, and the annular connecting portion 23 is fixedly connected with the wall body of the lamp housing 1 in a pressing manner. Further, annular connecting portion 23 is the same with the thickness of lamp pearl board 2, and annular connecting portion 23 and lamp pearl board 2 integrated into one piece.

The applicant shows that the existing high-power LED bulb is internally provided with an aluminum radiator, a lamp bead plate conducts heat to the aluminum radiator to dissipate heat, and the lamp bead plate and the aluminum radiator are connected in a screw locking mode. Because the adaptation has the clearance, still need to coat a layer heat conduction silicone grease on the installation face, guarantee abundant contact. But the heat dissipation structure has the defects that firstly, the production process is complicated; secondly, heat conduction silicone grease can reduce heat conduction efficiency, and the screw tightens up and makes lamp pearl board warp easily.

And the utility model discloses an add annular connecting portion on lamp pearl board to as an organic whole with the wall body suppression of annular connecting portion and lamp body with the fixed mode of pressfitting, both direct contact closely just are the aluminum product, and heat conduction efficiency is high. The heat dissipation can be realized through the aluminum shell, and under the heat dissipation structure of the convection channel, the efficient heat dissipation can be realized without arranging an aluminum radiator in the lamp shell, so that the process is simple, and the cost is lower.

Preferably, the heat convection structure is composed of a lamp housing 1, a lamp bead plate 2 and a light-transmitting lampshade 3, and a lamp holder is arranged at the top of the lamp housing 1.

In one embodiment, as shown in fig. 5, the annular connecting portion 23 is a closed-loop structure. In another embodiment, as shown in fig. 7, the annular connecting portion 23 is an open annular structure.

The utility model discloses a heat convection heat dissipation structure's heat convection heat dissipation principle is the same with current LED bulb, nevertheless the utility model discloses an improvement part lies in:

through the second through-hole of seting up on the fretwork position and the printing opacity lamp shade of seting up on the first through-hole, the lamp pearl board of seting up at the top of lamp body, the three combines to form a vertical convection current passageway to under the equal confined structure of lateral wall of lamp body and printing opacity lamp shade, can form a "chimney" structure from bottom to top, the utility model discloses just utilize the chimney effect to this strengthens the air flow nature of heat convection heat radiation structure. Compare current LED bulb, the utility model discloses a heat convection radiating effect is better.

Through set up the fretwork position on lamp pearl board, the cold air of benefit-in can be better takes away the heat on the lamp pearl board. The applicant detects that the heat dissipation effect of the bulb adopting the heat convection structure of the utility model is far higher than that of the existing LED bulb by 40 percent. In addition, the heat convection heat dissipation structure can realize excellent heat dissipation effect without arranging an aluminum heat radiator on the lamp shell, and reduce the production cost.

Further, as shown in fig. 6, it is a preferable structure of the translucent lampshade 3 of the present invention.

A plurality of protrusions 32 extend from the inner wall of the light-transmitting lampshade 3 to the lamp bead plate 2, and the protrusions 32 are hollow columnar structures which penetrate through the light-transmitting lampshade from top to bottom. The boss 32 is integrally injection-molded with the light-transmitting cover 3. The bottom opening of the protrusion 32 forms the second through hole 31, and the top opening of the protrusion 32 abuts against the hollowed-out portion 21.

In the present embodiment, as shown in fig. 6, the light-transmitting lamp housing 3 has and is only provided with one protrusion 32, and the protrusion 32 is located at the middle of the bottom of the light-transmitting lamp housing 3, i.e. the light-transmitting lamp housing 3 has and is only provided with one second through hole 31. The lamp bead plate 2 is provided with a hollow part 21 in the middle of the lamp bead plate 2 for the second through hole 31. Further, the second through hole 31 has a much larger aperture than the first through hole 11. Through this design, make lamp shade, lamp pearl board 2's simple structure, under the radiating circumstances of assurance, also be convenient for processing production.

In one example, as shown in fig. 6, an annular stepped groove 34 is formed on the outer wall of the top of the light-transmitting lampshade 3, the stepped groove 34 enables the light-transmitting lampshade 3 to be matched and embedded with the lamp housing 1, and the stepped groove 34 has certain positioning, mounting and limiting functions.

Meanwhile, in the conventional heat convection radiating LED bulb, a plurality of radiating holes are formed in the outer wall of the lamp housing, for example, one group of radiating holes are formed in the top of the outer wall of the lamp housing, and the other group of radiating through holes are formed in the bottom of the outer wall of the lamp housing; the two groups of heat dissipation devices and the inner cavity of the lamp shell form a convection channel and the like. However, the LED bulb of this type, which is originally suitable for outdoor applications such as street lamps, is susceptible to internal short circuits caused by rain infiltration. Therefore, the utility model discloses a lateral wall of lamp body 1 seals, and first through-hole 11, on the other hand, ladder groove 34 also can prevent the rainwater from infiltrating in the adaptation clearance are seted up at lamp body 1 top.

In another example, as shown in fig. 6, the inner wall of the lampshade 3 is provided with a buckling part 33, and specifically, the buckling part 33 is arranged on the top end surface of the protrusion part 32. And the lamp bead plate 2 is provided with a buckling hole 22 matched with the buckling part 33.

Through this design, light lampshade 3 carries out the lock joint through above-mentioned structure with lamp pearl board 2 to combine light lampshade 3 in the bottom of lamp body 1. This connected mode for light lampshade 3 does not have relevant connection structure with lamp body 1, has optimized lamp body 1, lamp pearl board 2 and the 3 three's of light lampshade connected mode, the equipment of being convenient for.

In one example, the light-transmitting lamp housing 3 is made of PC material.

As shown in fig. 2, the lamp cap includes a connector 4 and a metal shell, and the metal shell is sleeved and fixed on the top of the connector 4. The connector 4 is an insulator made of PC material. The metal shell can be a screw-on metal shell or a snap-on shell.

Further, the connector 4 and the lamp housing 1 are assembled by fastening. Specifically, connector 4 is a hollow body, and integrative being provided with an annular arc on the outer wall of body, the bottom of arc is provided with buckling part 33. The top of the lamp housing 1 is provided with a fastening hole 22 matching with the fastening portion 33 to realize fastening of the two. Through the design, the whole heat convection structure is free of bolt connection, the assembly is quick and convenient, and the production efficiency is high.

As shown in fig. 2, in order to avoid the arc-shaped plate of the connector 4 from shielding the first through hole 11, the convection heat dissipation is hindered. The arc-shaped plate is provided with a third through hole 42 corresponding to the first through hole 11, and the third through hole 42 is used for heat convection so that the lamp holder and the first through hole 11 are not interfered with each other.

In one example, a hollow tube portion 41 for accommodating the LED driver extends from the connected tube body, the hollow tube portion 41 penetrates through the top of the lamp housing 1 and is located in the inner cavity of the lamp housing 1, and the end of the hollow tube portion 41 is suspended at the top of the inner cavity and does not block the hollow portion 21 on the lamp bead plate 2. With this design, the hollow tube part 41 serves to protect the LED driver.

The present invention provides a heat convection structure, an LED lamp and other structures of a lamp.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. A heat convection heat dissipation structure is characterized by comprising a lamp shell, a lamp bead plate arranged at the bottom of the lamp shell, and a light-transmitting lamp shade used for shielding a bottom opening of the lamp shell;

2. The structure for heat convection heat dissipation according to claim 1, wherein:

a plurality of second through holes are formed in the light-transmitting lampshade, and a plurality of hollow parts are arranged on the lamp bead plate, so that the bottom end of the convection channel is communicated with the external space.

3. The structure for heat convection heat dissipation according to claim 2, wherein:

the inner wall of the light-transmitting lampshade extends a plurality of convex parts towards the lamp bead plate, and the convex parts are of hollow columnar structures which penetrate through the lamp bead plate up and down;

4. The structure for heat convection heat dissipation according to claim 1, wherein:

the periphery of lamp pearl board is provided with downwardly extending's annular connecting portion, and this annular connecting portion and the wall body pressfitting fixed connection of lamp body.

5. The structure for heat dissipation by convection according to claim 4, wherein:

the lamp shell is a hollow shell made of metal with high heat conductivity coefficient.

6. The structure for heat convection heat dissipation according to claim 1, wherein:

the light-transmitting lamp shade is provided with buckling parts, and buckling holes matched with the buckling parts are formed in the lamp bead plates.

7. The structure for heat convection heat dissipation according to claim 1, wherein:

the top of the lamp shell is also provided with a lamp cap connected with the lamp holder, and the lamp cap and the first through hole are not mutually interfered.

8. The structure for heat dissipation by convection according to claim 7, wherein:

the lamp holder comprises an insulated connector and a metal shell wrapping the outer wall of the top of the connector;

the connector has a hollow tube portion for receiving the LED driver.

9. An LED lamp comprising the structure for heat convection heat dissipation of any one of the above claims 1 to 8.

10. A luminaire comprising an LED lamp provided with the structure for heat convection heat dissipation of any one of claims 1 to 8.