CN104896336B - Led lamp tube - Google Patents

Abstract

An LED tube, comprising: the LED lamp comprises a lamp cap, an outer cover, a lampshade, a heat dissipation component, an LED lamp, an insulating cylinder and a circuit component. The heat dissipation assembly comprises a heat dissipation plate and a heat dissipation cylinder, the heat dissipation plate is provided with a first side face and a second side face, the heat dissipation cylinder is arranged on the first side face, and two convex blocks are arranged on the heat dissipation cylinder far away from the first side face. The heat dissipation part comprises a supporting plate and two heat dissipation wing plates, the two heat dissipation wing plates are respectively connected with two ends of the supporting plate, the supporting plate is supported with the heat dissipation cylinder, one side face, far away from the heat dissipation cylinder, of the supporting plate is supported with the lampshade, the supporting plate protrudes towards one side to form a supporting part, and the supporting part is supported with the heat dissipation cylinder and is located between the two convex blocks. The LED lamp tube is provided with the heat dissipation assembly and the heat dissipation piece which are abutted against each other, the LED lamp is arranged on the heat dissipation assembly, and the heat dissipation assembly and the heat dissipation piece dissipate heat in a cooperative mode, so that the heat dissipation performance of the LED lamp tube can be greatly improved. In addition, the LED lamp tube also has the advantage of firmer overall structure.

Description

LED light tube

technical field

The invention relates to the technical field of lighting, in particular to an LED lamp tube.

Background technique

LED (Light Emitting Diode, Light Emitting Diode) can directly and efficiently convert electrical energy into visible light, and has a service life of tens of thousands to one hundred thousand hours. Lamps that use LEDs as light sources are called LED lamps, which are known as the most commonly used lighting lamps for their high quality, durability, and energy-saving advantages. With the rapid development of LED lighting technology in recent years, LED lighting products have basically replaced the original fluorescent lighting.

The basic structure of the LED is a P-N junction of a semiconductor. When the current flows through the LED element, the temperature of the P-N junction will rise, and the temperature of the P-N junction area is called the junction temperature of the LED. It has a very small size, so the temperature of the LED chip is also called the junction temperature of the LED chip.

At present, one disadvantage of the LED lamp itself is that the light effect of the LED lamp is greatly affected by the junction temperature of the LED lamp. service life. Since the temperature of the LED lamp will continue to rise when it is emitting light, if the heat generated by the LED lamp cannot be dissipated in time during continuous lighting work, it will cause damage to the LED lamp and affect the service life of the LED lamp. Therefore, solving the heat dissipation problem of LED lamps is very important for improving the performance of LED lamps.

However, the existing LED lamp tubes still have the problem of poor heat dissipation performance, especially when a relatively high-power LED lamp is used as a light source, the heat generation problem becomes more and more obvious. In addition, the existing LED light tube still has the problem that the overall structure is not strong enough.

Contents of the invention

Based on this, it is necessary to provide an LED lamp tube with better heat dissipation performance and a more reliable overall structure.

An LED light tube, comprising:

Lamp holder,

s,

A lampshade, the lampshade is a cylindrical structure, the two ends of the lampshade are respectively connected with the lamp holder and the outer cover, and the inner wall of the lampshade is provided with a chute;

A heat dissipation assembly, the heat dissipation assembly includes a heat dissipation plate and a heat dissipation cylinder, the two ends of the heat dissipation plate are connected to the lamp cap and the outer cover respectively, the heat dissipation plate has a first side and a second side, and the heat dissipation cylinder It is arranged on the first side, the heat dissipation cylinder is a hollow structure, and the heat dissipation cylinder is provided with two protrusions away from the first side, and the side edge of the heat dissipation plate is slidably arranged on the slide groove;

A heat sink, the heat sink includes a resisting plate and two heat dissipation fins, the two heat dissipation fins are respectively connected to both ends of the resisting plate, the resisting plate is resisted by the heat sink, The side of the resisting plate away from the heat dissipation cylinder is resisted against the lampshade, and the resisting plate protrudes to one side to form a resisting portion, and the resisting portion is resisted by the heat dissipation cylinder and is located on both sides. between the bumps;

LED lights, the LED lights are arranged on the second side of the heat sink;

an insulating cylinder, the insulating cylinder is accommodated in the heat dissipation cylinder;

The circuit assembly is accommodated in the insulating cylinder.

In one of the embodiments, there is a space between the resisting portion and the bump.

In one of the embodiments, a filling block is also provided, and the filling block is respectively opposed to the outer wall of the insulating cylinder and the inner wall of the heat dissipation cylinder.

In one of the embodiments, several filling blocks are provided.

In one embodiment, several of the filling blocks are evenly distributed between the outer wall of the insulating cylinder and the inner wall of the heat dissipation cylinder.

In one of the embodiments, the filling block is made of insulating material.

In one embodiment, the filling block is made of rubber.

The above-mentioned LED lamp tube can greatly improve the heat dissipation performance of the LED lamp tube by setting the heat dissipation assembly and the heat dissipation piece against each other, and installing the LED lamp on the heat dissipation assembly, and the heat dissipation assembly and the heat dissipation piece cooperate to dissipate heat. In addition, the above-mentioned LED lamp tube also has the advantage of a relatively solid overall structure.

Description of drawings

Fig. 1 is a schematic structural view of an LED lamp tube according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of another angle of the LED lamp shown in Fig. 1;

Fig. 3 is a schematic structural diagram of an LED lamp tube according to another embodiment of the present invention;

Fig. 4 is a schematic structural diagram of an LED lamp tube according to another embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an LED lamp tube according to another embodiment of the present invention;

Fig. 6 is a schematic structural diagram of an LED lamp tube according to another embodiment of the present invention.

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 and FIG. 2 , the LED lamp tube 10 includes: a lamp base 100 , an outer cover 200 , a lampshade 300 , a heat dissipation component 400 , a heat dissipation element 500 , an LED lamp 600 , an insulating cylinder 700 and a circuit assembly 800 . The lamp holder 100 and the outer cover 200 are disposed at both ends of the lampshade 300 , and the heat dissipation assembly 400 , the heat dissipation element 500 , the LED lamp 600 , the insulating tube 700 and the circuit assembly 800 are all accommodated in the lampshade 300 .

Please refer to FIG. 1 , the two ends of the lampshade 300 are respectively connected with the lamp base 100 and the outer cover 200 , that is, one end of the lamp shade is connected with the lamp base, and the other end is connected with the outer cover. Please also refer to FIG. 2 , the lampshade 300 is a cylindrical structure, and the inner wall of the lampshade 300 is provided with a chute 310 . For example, the lamp cap is used to be installed on an external lamp holder; as another example, the lamp cap is provided with pins, and the pins are used for electrical connection with the external lamp socket, so as to provide the normal operation of the LED lamp. power supply.

Please refer to FIG. 2 , the heat dissipation assembly 400 includes a heat dissipation plate 410 and a heat dissipation cylinder 420. above cover connection. The cooling plate 410 has a first side 411 and a second side 412 , and the cooling cylinder 420 is disposed on the first side 411 . For example, the heat dissipation tube 420 is a hollow structure; as another example, the heat dissipation tube 420 is a hollow square tube structure; as another example, the lampshade 300 is a hollow square tube structure; preferably, as shown in FIG. 2 , its edges have curved corners.

Please refer to FIG. 2 , the side edges of the heat dissipation plate 410 are slidably arranged in the chute 310 , and when the heat dissipation assembly 400 needs to be installed in the lampshade 300 , slide the side edges of the heat dissipation plate 410 into the lampshade 300 along the chute 310 In this way, the convenience of the installation operation can be greatly improved, and the heat dissipation assembly 400 can be more firmly fixed in the lampshade 300 .

In order to further improve the convenience of installation and operation, and to make the heat dissipation assembly more firmly fixed in the lampshade, for example, the lampshade is a square cylindrical structure, please refer to Figure 2. The two side edges of the heat dissipation plate are respectively slidably arranged in the two slide grooves. In this way, the convenience of installation operation can be further improved, and the heat dissipation assembly can be more firmly fixed in the lampshade.

Please refer to FIG. 2 , the heat sink 500 includes a resisting plate 510 and two cooling fins 520 , and the two cooling fins 520 are respectively connected to two ends of the resisting plate 510 . The abutting plate 510 is in contact with the cooling cylinder 420, so that the heat absorbed by the cooling cylinder 420 can be quickly and timely transferred to the abutting plate 510, and then the heat absorbed by the abutting plate 510 is then diffused to the entire The heat dissipation element 500 can effectively increase the heat dissipation surface area.

Please refer to FIG. 2 , a side of the resisting plate 510 away from the heat sink 420 is resisted against the lampshade 300 , and the heat dissipation fin 520 is resisted against the lampshade 300 . In this way, the heat sink 500 can better fix and support the heat sink 420 .

Please refer to FIG. 2 , the LED lamp 600 is disposed on the second side 412 of the heat sink 410 . The heat generated by the light emitted by the LED lamp 600 during operation can be transferred to the heat sink 410, and then transferred to the heat sink 420 by the heat sink 410, and finally, transferred to the heat sink 500 by the heat sink 420. During the process of heat transfer, heat dissipation The plate 410 , the heat sink 420 and the heat sink 500 all dissipate heat into the air medium. In this way, the heat dissipation path can be optimized and the heat dissipation surface area can be increased.

Please refer to Fig. 2, the insulating cylinder 700 is accommodated in the heat dissipation cylinder 420, and the circuit assembly 800 is accommodated in the insulation cylinder 700, so that the circuit assembly 800 can be accommodated in the insulation cylinder 700 to avoid the circuit assembly 800 from contacting the heat dissipation cylinder. 420 contacts, the problem of electric leakage occurs, thereby improving the safety performance of the LED lamp tube.

In order to further improve the safety performance of the LED lamp tube, for example, please refer to FIG. 3 , the inner wall of the insulating cylinder 700 is provided with a number of support columns 710, and the circuit assembly 800 is opposed to the ends of the support columns 710; as another example, the support columns It is a cylindrical structure; as another example, the end of the support column and the circuit assembly is a hemispherical structure; as another example, the material of the support column is insulating material; as another example, the material of the support column is Rubber; as another example, several support columns are set; as another example, several support columns are evenly distributed on the inner wall of the heat dissipation tube, and the circuit components can be better supported and fixed by the support columns, thereby further improving the LED performance. The safety performance of the lamp tube.

In order to further make the overall structure of the LED light tube more reliable, for example, please refer to FIG. 2 , the cooling cylinder 420 is provided with two protrusions 421 away from the first side 411, and the abutment plate 510 protrudes to one side to form an abutment portion. 511, the abutment portion 511 is abutted against the cooling tube 420 and is located between the two bumps 421; as another example, there is a gap between the abutment portion 511 and the bumps 421; as another example, a filling block 422 is also provided, the filling block 422 respectively against the outer side wall of the insulating tube 700 and the inner side wall of the heat dissipation tube 420; as another example, a number of filling blocks are provided; as another example, a number of filling blocks are evenly distributed on the outer side wall of the insulating tube and the inner side wall of the heat dissipation tube 420; Between the inner side walls of the cooling tube; as another example, the material of the filling block is insulating material; as another example, the material of the filling block is rubber, so that the overall structure of the LED light tube can be further made more reliable.

In order to improve the simplicity and convenience of the installation and operation of the LED lamp tube, for example, please refer to FIG. Between the position slots 340, the first side 411 and the second side 412 of the cooling plate 410 are respectively provided with a card slot 411a and a limit bar 412a, the limit bar 412a is slidably arranged in the limit slot 340, and a part of the elastic buckle 330 is embedded. Placed in the card slot 411a, so that the elastic buckle 330 and the limit groove 340 of the lampshade 300 can respectively play a position-limiting and guiding role for the card slot 411a and the limit bar 412a of the heat sink 410, so that the LED lamp tube can be improved. Ease of installation and operation.

In order to further improve the simplicity and convenience of the installation and operation of the LED lamp tube, for example, the chute is a bar-shaped structure; as another example, the limiting groove is a bar-shaped structure; as another example, the elastic buckle has a semicircular shape Shaped cross section; as another example, the elastic buckle is provided with a protrusion, and the protrusion is embedded in the card slot; as another example, several protrusions are provided; as another example, several protrusions are distributed at intervals The elastic buckle, in this way, can further improve the simplicity and convenience of the installation operation of the LED light tube.

In order to further improve the heat dissipation performance of the LED lamp tube, for example, please refer to FIG. and partially exposed outside the lampshade 300; as another example, the heat sink is a sheet-like structure with a rectangular plane; as another example, the heat sink is a sheet-like structure with a rectangular arc surface; as another example, several heat sinks are provided fins; as another example, several of the heat dissipation fins are distributed on the heat dissipation fins at intervals; as another example, a number of the heat dissipation fins are evenly distributed on the heat dissipation fins, so that the heat dissipation fins are provided with the heat dissipation fins, The heat dissipation surface area can be effectively increased, and the heat dissipation fins extend out of the lampshade, which is beneficial to transfer the heat in the lampshade to the external air medium, thereby further improving the heat dissipation performance of the LED lamp tube.

In order to further improve the heat dissipation performance of the LED lamp tube, for example, please refer to FIG. It communicates with the outside world, please refer to Fig. 5 together, the heat dissipation fin 520 is provided with a number of heat dissipation columns 522 connected with the heat dissipation tube 420; as another example, the heat dissipation column is a hollow structure; as another example, the heat dissipation column is circular columnar structure; as another example, the heat dissipation hole is a circular hole; as another example, the diameter of the circular hole is 5 mm to 10 mm; as another example, the diameter of the circular hole is 8 mm to 9 mm; as another example, the circular hole The diameter of the shaped hole is 8.5 mm, so that the heat dissipation performance of the LED lamp tube can be further improved.

The above-mentioned LED lamp tube 10 can greatly improve the heat dissipation performance of the LED lamp tube 10 by setting the heat dissipation assembly 400 and the heat dissipation member 500 against each other, and installing the LED lamp 600 on the heat dissipation assembly 400, and the heat dissipation assembly 400 and the heat dissipation member 500 cooperate to dissipate heat. .

In order to further improve the heat dissipation performance of the LED lamp tube, for example, the heat dissipation assembly and the heat dissipation element are prepared by using a heat dissipation alloy, and the heat dissipation alloy includes a heat absorption layer, a heat conduction layer and a heat dissipation layer arranged in sequence; For example, the materials of the heat absorption layer, the heat conduction layer and the heat dissipation layer are the same or different; as another example, the LED lamp is arranged on the heat absorption layer; as another example, the heat absorption layer, the heat dissipation layer The heat conduction performance of the heat conduction layer and the heat dissipation layer decreases successively, forming a gradient of heat conduction performance, thereby further optimizing the heat dissipation path of the heat dissipation alloy, greatly improving the heat dissipation performance of the heat dissipation assembly and the heat dissipation element, and further improving the The heat dissipation performance of the LED lamp tube, in this way, can meet the heat dissipation requirement of the LED lamp tube with a large calorific value.

For example, in the LED lamp tube according to one embodiment of the present invention, the heat absorbing layer of the heat dissipation alloy includes the following components in parts by mass:

90-92 parts of copper, 2-4.5 parts of aluminum, 1-2.5 parts of magnesium, 0.5-0.8 parts of nickel, 0.1-0.3 parts of iron, 1.5-4.5 parts of vanadium, 0.1-0.4 parts of manganese, titanium 0.5-0.8 parts, 0.5-0.8 parts of chromium, 0.5-0.8 parts of vanadium, 0.8-15 parts of silicon and 0.5-2 parts of graphene.

Firstly, the above-mentioned heat absorbing layer contains 90-92 parts of copper (Cu), which can make the heat absorbing layer have better heat absorbing energy. When the mass part of copper is 90-92 parts, the thermal conductivity of the heat-absorbing layer can reach more than 365W/mK, which can quickly absorb the heat generated by the LED lamp, and then evenly disperse the heat in the whole heat-absorbing layer. Structurally, to prevent heat from accumulating at the contact position between the LED lamp and the heat absorbing layer, resulting in local overheating. Moreover, the density of the heat absorbing layer is lower than that of pure copper, which can effectively reduce the weight of the heat absorbing layer, which is more convenient for installation and manufacturing, and also greatly reduces the cost. Among them, the definition of thermal conductivity is: per unit length, per K, how many W of energy can be transmitted, the unit is W/mK, where "W" refers to the thermal power unit, "m" represents the length unit meter, and "K" is The absolute temperature unit, the larger the value, the better the heat absorption performance. In addition, by adding 0.5-2 parts of graphene, the thermal conductivity can be effectively improved, thereby improving the heat-absorbing performance of the heat-absorbing layer.

Secondly, the heat absorbing layer contains 2-4.5 parts by mass of aluminum, 1-2.5 parts of magnesium, 0.5-0.8 parts of nickel, 0.1-0.3 parts of iron, 1.5-4.5 parts of vanadium, 0.1 parts -0.4 parts manganese, 0.5-0.8 parts titanium, 0.5-0.8 parts chromium, and 0.5-0.8 parts vanadium. Compared with the pure copper material, the ductility, toughness, strength and high temperature resistance of the heat absorbing layer are greatly improved, and it is not easy to sinter; in this way, when the LED lamp is installed on the heat absorbing layer, it can prevent the LED lamp from burning. High temperature will cause damage to the heat absorbing layer, and having good ductility, toughness and strength can also prevent the heat absorbing layer from being deformed due to excessive stress when the LED lamp is installed. Wherein, the heat absorbing layer contains 0.5-0.8 parts by mass of nickel (Ni), which can improve the high temperature resistance of the heat absorbing layer. As another example, the heat absorbing layer contains 1.5 to 4.5 parts by mass of vanadium (V), which can inhibit the grain growth of the heat absorbing layer and obtain a more uniform and fine grain structure, so as to reduce the brittleness of the heat absorbing layer and improve the heat absorbing layer. Mechanical properties of the thermal layer as a whole to improve toughness and strength. In another example, the heat absorbing layer contains 0.5-0.8 parts by mass of titanium (Ti), which can make the crystal grains of the heat absorbing layer finer, so as to improve the ductility of the heat absorbing layer.

Finally, the heat absorbing layer also includes 0.8-15 parts by mass of silicon (Si). When the heat absorbing layer contains an appropriate amount of silicon, the heat absorbing layer can be effectively improved without affecting the heat absorbing performance of the heat absorbing layer. hardness and wear resistance. However, after many times of theoretical analysis and experimental evidence, it is found that when the mass of silicon in the heat-absorbing layer is too much, for example, when the mass percentage exceeds 15 parts, black particles will be distributed on the surface of the heat-absorbing layer, and the ductility will be reduced, which is not conducive to Production molding of the heat absorbing layer.

For example, in the LED lamp tube according to one embodiment of the present invention, the heat conduction layer of the heat dissipation alloy includes the following components in parts by mass:

60-65 parts of copper, 55-60 parts of aluminum, 0.8-1.2 parts of magnesium, 0.2-0.5 parts of manganese, 0.05-0.3 parts of titanium, 0.05-0.1 parts of chromium, 0.05-0.3 parts of vanadium, silicon 0.3-0.5 parts and 0.1-0.3 parts of graphene.

First of all, the above-mentioned heat conducting layer contains 60-65 parts by mass of copper and 55-60 parts of aluminum, which can keep the thermal conductivity of the heat-conducting layer at 320W/mK-345W/mK, so as to ensure that the heat-conducting layer can absorb heat The heat generated by the LED lamp absorbed by the layer is quickly transferred to the heat dissipation layer, thereby preventing heat from accumulating on the heat conduction layer and causing local overheating. Compared with the prior art, simply using expensive and high-quality copper, the above-mentioned heat-conducting layer can not only ensure the rapid transfer of heat from the heat-absorbing layer to the heat-dissipating layer, but also has the advantages of light weight, easy installation and casting, and relatively low price. The advantages. At the same time, compared with the prior art, simply using aluminum alloy with poor heat dissipation effect, the above-mentioned heat conduction layer has better heat transfer performance.

Secondly, by adding 0.1-0.3 parts of graphene, the thermal conductivity of the heat-conducting layer can be greatly improved, and the heat transferred from the heat-absorbing layer can be better transferred to the heat-dissipating layer.

Finally, the heat conducting layer contains 0.8-1.2 parts by mass of magnesium, 0.2-0.5 parts of manganese, 0.05-0.3 parts of titanium, 0.05-0.1 parts of chromium, 0.05-0.3 parts of vanadium and 0.3 parts ~0.5 parts of silicon, thereby improving the mechanical properties and high temperature resistance properties of the heat conducting layer, for example, the mechanical properties include but not limited to yield strength and tensile strength. For example, the heat-conducting layer contains 0.8-1.2 parts by mass of magnesium, which can impart yield strength and tensile strength to the heat-conducting layer to a certain extent, because the heat-absorbing layer, heat-conducting layer and heat-dissipating layer need to be combined in the manufacturing process of the heat-dissipating alloy. The overall stamping is integrally formed, which requires the heat dissipation layer to have a strong yield strength to prevent the heat dissipation layer from being irreversibly deformed by excessive stamping stress during processing, thereby ensuring the normal heat dissipation performance of the heat dissipation alloy. When the relative mass of magnesium is too low, such as when the mass part is less than 0.8 parts, the yield strength of the heat conducting layer cannot be fully guaranteed to meet the requirements; however, when the relative mass of magnesium is too high, such as when the mass part is greater than 1.2 parts, it will be The ductility and thermal conductivity of the heat-conducting layer drop rapidly. For example, the heat-conducting layer contains 0.2-0.8 parts by mass of iron, which can endow the heat-conducting layer with higher high-temperature resistance and high-temperature-resistant mechanical properties, which is beneficial to the processing and casting of the heat-conducting layer.

For example, in the LED lamp tube according to one embodiment of the present invention, the heat dissipation layer of the heat dissipation alloy includes the following components in parts by mass:

88-93 parts of aluminum, 5.5-10.5 parts of silicon, 0.3-0.7 parts of magnesium, 0.05-0.3 parts of copper, 0.2-0.8 parts of iron, 0.2-0.5 parts of manganese, 0.05-0.3 parts of titanium, chromium 0.05 to 0.1 parts, 0.05 to 0.3 parts of vanadium and 5 to 15 parts of graphene.

First of all, the heat dissipation layer contains 88-93 parts by mass of aluminum, which can keep the thermal conductivity of the heat dissipation layer at 200W/mK-220W/mK. When the heat generated by the LED lamp passes through the heat absorption layer and the heat conduction layer after partial heat dissipation When the remaining heat is transferred to the heat dissipation layer through the heat conduction layer, the heat dissipation layer can ensure that the remaining heat is dissipated evenly and continuously, thereby preventing heat from accumulating on the heat dissipation layer and causing local overheating.

Secondly, by adding 5-15 parts of graphene, the heat dissipation performance of the heat dissipation layer can be effectively improved, and the heat transferred from the heat conduction layer can be quickly dissipated into the external air medium.

Finally, the heat dissipation layer contains 5.5-10.5 parts by mass of silicon, 0.3-0.7 parts of magnesium, 0.05-0.3 parts of copper, 0.2-0.8 parts of iron, 0.2-0.5 parts of manganese, 0.05 parts of ~0.3 parts of titanium, 0.05~0.1 parts of chromium and 0.05~0.3 parts of vanadium can greatly improve the heat dissipation performance of the heat dissipation layer. For example, the heat dissipation layer contains 5.5-10.5 parts by mass of silicon and 0.05-0.3 parts of copper, which can ensure that the heat dissipation layer has the advantages of good mechanical properties and light weight, and at the same time, can further improve the thermal conductivity of the heat dissipation layer , to further ensure that the heat dissipation layer can evenly and continuously dissipate the remaining heat transferred through the heat absorption layer and the heat conduction layer, thereby preventing heat from accumulating on the heat dissipation layer and causing local overheating.

In order to further improve the tensile strength of the heat dissipation layer, for example, the heat dissipation layer further includes 0.8 to 1.2 parts by mass of lead (Pb). When the heat dissipation layer contains 0.8 to 1.2 parts of lead, the heat dissipation layer can be improved. Tensile strength, in this way, can prevent the heat dissipation layer from breaking due to excessive stamping and pulling stress when it is cast and stamped into heat dissipation fins, that is, a sheet structure.

In order to further improve the high-temperature oxidation resistance of the heat dissipation layer, for example, the heat dissipation layer further includes niobium (Nb) with a mass fraction of 0.05-0.08. When the mass fraction of niobium is greater than 0.05, the heat dissipation can be greatly improved The anti-oxidation performance of the layer, it can be understood that the heat dissipation layer, as the part with the largest contact area with the outside air in the LED street light radiator, has high requirements for high-temperature oxidation resistance. However, when the mass fraction of niobium is greater than 0.08, the magnetic properties of the heat dissipation layer will increase sharply, which will affect other components in the LED lamp tube.

In order to further improve the heat dissipation performance of the heat dissipation layer, for example, the heat dissipation layer also includes germanium (Ge) with a mass part of 0.05 to 0.2 parts. When the mass part of germanium is greater than 0.05 parts, the heat dissipation performance of the heat dissipation layer will be improved. However, when the mass proportion of germanium is too much, for example, when the mass fraction of germanium is greater than 0.2, the brittleness of the heat dissipation layer will increase.

The above-mentioned heat-dissipating alloy is sequentially stacked with the heat-absorbing layer, the heat-conducting layer, and the heat-dissipating layer, and the heat-conducting properties of the heat-absorbing layer, the heat-conducting layer, and the heat-dissipating layer decrease successively, forming a gradient of heat conduction performance , Compared with pure copper material, under the premise of ensuring the heat dissipation performance, the weight is greatly reduced; compared with the aluminum alloy that exists in large quantities in the market, the heat dissipation performance is greatly enhanced.

It should be noted that other embodiments of the present invention also include LED lamp tubes formed by combining the technical features of the above-mentioned embodiments.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (7)

1. a kind of LED lamp tube, including：Lamp holder, enclosing cover, lampshade, radiating subassembly, circuit unit and LED, the lampshade are tubular Structure, the two ends of the lampshade are connected with the lamp holder and the enclosing cover respectively, and the radiating subassembly includes heat sink and radiating Cylinder, the two ends of the heat sink are connected with the lamp holder and the enclosing cover respectively, and the heat sink has first side and second Sideways, the heat-dissipating cylinder is arranged at the first side, and the heat-dissipating cylinder is hollow-core construction, and the LED is arranged at described dissipate The second side of hot plate, it is characterised in that

The madial wall of the lampshade offers chute；

The heat-dissipating cylinder is provided with two projections away from the first side, and the side edge of the heat sink is slideably positioned in institute State chute；

Wherein, the LED lamp tube also includes radiating piece and insulating cylinder, and the radiating piece includes supporting plate and two radiating wing plates, Two radiating wing plates are connected with the two ends for supporting plate respectively, and the plate that supports is supported with the heat-dissipating cylinder, described to support Hold one side of the plate away from the heat-dissipating cylinder to support with the lampshade, the plate that supports protrudes to form support division to side, described Support division and the heat-dissipating cylinder are supported and between two projections；The insulating cylinder is placed in the heat-dissipating cylinder；

The circuit unit is placed in the insulating cylinder.

2. LED lamp tube according to claim 1, it is characterised in that between being provided between the support division and the projection Every.

3. LED lamp tube according to claim 1, it is characterised in that also set up filling block, the filling block respectively with it is described The madial wall of the lateral wall of insulating cylinder and the heat-dissipating cylinder is supported.

4. LED lamp tube according to claim 3, it is characterised in that some filling blocks are set.

5. LED lamp tube according to claim 4, it is characterised in that some filling blocks are uniformly distributed in the insulation Between the lateral wall of cylinder and the madial wall of the heat-dissipating cylinder.

6. LED lamp tube according to claim 5, it is characterised in that the material of the filling block is insulating materials.

7. LED lamp tube according to claim 6, it is characterised in that the material of the filling block is rubber.