CN105042374A - LED straight tube lamps - Google Patents

Abstract

An LED straight tube lamp, comprising: the light-transmitting cover is of an arc-shaped structure, and the end part of the light-transmitting cover extends and is bent to form a sliding part; the heat dissipation cover comprises a mounting plate and a cover body, the cover body is of an arc-shaped structure, two ends of the cover body are respectively connected with two side edges of the mounting plate, the mounting plate extends and bends to form a bent part, the bent part and the end part of the cover body enclose a sliding groove, the sliding part is arranged in the sliding groove in a sliding mode, the cover body is provided with a plurality of heat dissipation holes, the plurality of heat dissipation holes are sequentially distributed in the cover body at intervals, and the inner space of the cover body is communicated with the; the lamp holder is connected with the end part of the mounting plate; the lamp panel is attached to one side face, away from the cover body, of the mounting plate; and a plurality of LED sub-light sources. The LED straight tube lamp is provided with the heat dissipation cover and the lamp panel which are mutually abutted, the LED sub-light source is installed on the lamp panel, the heat dissipation cover and the lamp panel perform heat dissipation in a cooperative mode, in addition, the cover body is provided with the plurality of heat dissipation holes, and the heat dissipation performance of the LED lamp tube can be greatly improved.

Description

LED straight tube lamps

technical field

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

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.

At present, one disadvantage of LED straight tube lamps is that the light effect of LED straight tube lamps is greatly affected by the junction temperature of LED straight tube lamps. Higher chip junction temperature will lead to a significant decrease in light efficiency and affect the The service life of LED straight tube lamps. 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.

For example, Chinese Patent Application No. 201220413753.1 discloses a heat dissipation LED lamp, which specifically discloses a lamp cap, a convection heat dissipation lamp body, and a lampshade matching the convection heat dissipation lamp body. The convection heat dissipation lamp body is provided with an LED light board , the LED lamp board is provided with an LED lamp, and the convection heat dissipation lamp body is provided with a convection cavity, and a convection port and a convection groove which are both communicated with the convection cavity. The utility model has simple structure and low cost, and the heat dissipation performance is greatly improved by setting the convection heat dissipation lamp body structure.

For example, the Chinese patent application number is 201410360995.2, which discloses a lamp tube radiator for LED lamps. Its specific disclosure includes a tube body and two fans; On one side of the support part, it is used to fix and install the external LED lights; each heat dissipation strip is respectively arranged on the other side of the support part; several rows of heat dissipation holes are also opened on the support part; the two sides of each row of heat dissipation holes are respectively a heat dissipation The installation part is provided with a cavity part, a heat conduction column and a number of heat conduction holes; a fan is fixedly installed at both ends of the pipe body to supply air to the middle part of the pipe body. The fan in the heat sink of the lamp tube of the above-mentioned LED lamp blows air to the middle of the tube body, and the airflow formed blows to the LED lamp and flows in the gap between the cavity and the heat dissipation strips, so that the air accumulated in the lampshade is collected in the form of convection. The heat in the interior, the cavity and the gap between the heat dissipation strips is taken away in time to avoid long-term accumulation of heat in large quantities, which will cause the electronic components in the LED lamp to burn out and prolong its service life.

For example, Chinese Patent Application No. 201210332183.8 discloses a high-efficiency radiator for LED lamps, which specifically discloses a radiator body, which is integrated with copper heat-conducting columns and a plurality of them, and is arranged to diverge outwards. Composed of heat sinks, the copper heat conduction column is fixed in the center of the heat sink by hot pressing, wherein the surface of the heat sink is a curved surface, and there are heat dissipation gaps between the heat sinks. The beneficial effects of the present invention are: adopt copper pillars to conduct heat, strengthen the ability to export heat energy, and solve the existing problem of thermal blockage, and at the same time, the surface of the radiator is designed with a full curved surface, which increases the contact surface with the air and improves the heat dissipation performance of the radiator , reduces the light decay of the LED, prolongs the life of the LED, and has the characteristics of simple structure and convenient use.

However, the LED straight tube lamps disclosed in the above-mentioned patents still have the problem of poor heat dissipation performance, especially when a relatively high-power LED lamp is used as a light source, the problem of heat generation becomes more obvious.

Contents of the invention

Based on this, it is necessary to provide an LED straight tube lamp with better heat dissipation performance.

An LED straight tube luminaire, comprising:

A light-transmitting cover, the light-transmitting cover is an arc-shaped structure, and the end of the light-transmitting cover is extended and bent to form a sliding part;

A heat dissipation cover, the heat dissipation cover includes a mounting plate and a cover body, the cover body is an arc-shaped structure, the two ends of the cover body are respectively connected to the two sides of the mounting plate, and the side edges of the mounting plate Extend and bend to form a bent part, the bent part and the end of the cover form a sliding groove, the sliding part is slidably arranged in the sliding groove, and the cover is provided with a plurality of cooling holes , a plurality of the heat dissipation holes are sequentially distributed in the cover at intervals, and the inner space of the cover communicates with the outside through the heat dissipation holes;

a lamp cap, the lamp cap is connected to the end of the mounting plate;

a light board, the light board is attached to a side of the mounting plate away from the cover; and

A plurality of LED sub-light sources, the plurality of LED sub-light sources are sequentially arranged at intervals on a side of the lamp board away from the installation board.

In one of the embodiments, the heat dissipation holes are square hole-like structures.

In one of the embodiments, the heat dissipation holes are circular hole-like structures.

In one embodiment, the diameter of the heat dissipation hole is 0.2mm˜0.5mm.

In one embodiment, the diameter of the heat dissipation hole is 0.3mm˜0.4mm.

In one embodiment, the diameter of the heat dissipation hole is 0.35mm.

In one of the embodiments, a dust filter is arranged in the heat dissipation hole.

The above-mentioned LED straight tube lamp is provided with a heat dissipation cover and a lamp board against each other, and the LED sub-light source is installed on the lamp board, and the heat dissipation cover and the lamp board cooperate to dissipate heat. LED lamp heat dissipation performance.

Description of drawings

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

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

Fig. 3 is a structural schematic diagram of another angle of the LED straight tube lamp shown in Fig. 1;

4 is a schematic structural view of an LED straight tube lamp according to another embodiment of the present invention;

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

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

Fig. 7 is a schematic structural view of an LED straight tube lamp according to another embodiment of the present invention;

Fig. 8 is a schematic structural view of an LED straight tube lamp according to another embodiment of the present invention.

Detailed ways

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.

For example, an LED straight tube LED straight tube lamp includes: a light-transmitting cover, the light-transmitting cover is an arc-shaped structure, and the end of the light-transmitting cover is extended and bent to form a sliding part; a heat dissipation cover, the heat dissipation The cover includes a mounting plate and a cover body, the cover body is an arc structure, the two ends of the cover body are respectively connected to the two sides of the mounting plate, the side edges of the mounting plate are extended and bent to form a curved The folding part, the bending part and the end of the cover form a sliding groove, the sliding part is slidably arranged in the sliding groove, the cover is provided with a plurality of heat dissipation holes, and a plurality of the heat dissipation holes The holes are sequentially distributed in the cover body at intervals, and the inner space of the cover body communicates with the outside through the heat dissipation holes; the lamp cap, the lamp cap is connected to the end of the mounting plate; the lamp board, the lamp board is attached On a side of the installation board away from the cover; and a plurality of LED sub-light sources, the plurality of LED sub-light sources are sequentially arranged at intervals on a side of the lamp board away from the installation board.

In order to further understand the above LED straight tube lighting, another example is an LED straight tube lighting, which includes the LED straight tube lighting described in any one of the above embodiments.

Please refer to FIG. 1 and FIG. 3 together. The LED straight tube lamp 10 includes: a transparent cover 100 , a heat dissipation cover 200 , a lamp holder 300 , a lamp board 400 and a plurality of LED sub-light sources 500 . The transparent cover 100 is set on the heat dissipation cover 200 , the lamp cap 300 is set on the end of the heat dissipation cover 200 , the lamp board 400 is set on the heat dissipation cover 200 , and a plurality of LED sub-light sources 500 are set on the lamp board 400 .

Please refer to FIG. 3 , the transparent cover 100 is an arc-shaped structure, and the end of the transparent cover 100 is extended and bent to form a sliding part 110 . The transparent cover 100 is used to atomize the light, so as to make the light emitted from the LED straight tube lamp 10 softer, so as to protect the health of human eyes, and further make the lighting effect more uniform.

Please refer to Fig. 3, the heat dissipation cover 200 includes a mounting plate 210 and a cover body 220, the cover body 210 is an arc-shaped structure, the two ends of the cover body 210 are respectively connected to the two sides of the mounting plate 210, and the side edges of the mounting plate 210 extend The bending portion 211 is formed by bending. The bending portion 211 and the end of the cover body 220 enclose a sliding groove 212 , and the sliding portion 110 is slidably disposed in the sliding groove 212 . In this way, the translucent cover 100 and the heat dissipation cover 200 can be assembled together only by sliding the sliding part 110 of the translucent cover 100 into the sliding groove 212. Similarly, when the translucent cover 100 needs to be removed from the heat dissipation cover 200 When disassembling, just slide the sliding portion 110 of the light-transmitting cover 100 out of the sliding groove 212 , and the assembly and disassembly operations are relatively simple and convenient.

Please refer to FIG. 2 and FIG. 3 together, the lamp cap 300 is connected to the end of the mounting plate 210 . 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 to electrically connect with the external lamp socket to ensure the normal operation of the LED sub-light source. Provide power.

Referring to FIG. 3 , the light board 400 is attached to a side of the installation board 210 away from the cover 220 . For example, the thickness of the lamp panel is 1.5cm-2cm; as another example, the thickness of the lamp panel is 1.6cm-1.8cm; as another example, the thickness of the lamp panel is 1.7cm. In this way, both the strength of the lamp board and the weight of the LED straight tube lamp can be taken into account, and the LED sub-light sources are firmly installed. As another example, the light board is also provided with a number of ventilation holes for accelerating internal heat dissipation.

Please refer to FIG. 3 , a plurality of LED sub-light sources 500 are sequentially arranged at intervals on a side of the lamp board 400 away from the mounting board 210 . For example, the LED sub-light source is an LED chip; as another example, the LED sub-light source is an LED lamp; as another example, the LED sub-light source is an LED spotlight. For example, the LED straight tube lamp further includes a circuit assembly, and the circuit assembly is electrically connected to the LED sub-light source. For example, the LED sub-light sources are arranged in one or two rows. In another example, adjacent LED sub-light sources in the same row are equally spaced.

It should be noted that, when the LED sub-light source 500 is working, the heat generated by emitting light can be transferred to the lamp board 400, and then transferred from the lamp board 400 to the installation board 210, and finally, the heat is transferred from the installation board 210 to the cover body 220. During the transfer process, the lamp board 400, the installation board 210 and the cover body 220 will all lose heat to the air medium. In this way, the heat dissipation path can be optimized and the heat dissipation surface area can be increased.

In order to improve the refraction and/or reflection efficiency of the LED straight tube luminaire, to improve the utilization efficiency of the light source, and to increase the brightness of the LED straight tube luminaire, for example, please refer to FIG. 4 , the lamp board 400 is far away from the cover body 220 is provided with a reflective layer 410 on one side, and the LED sub-light source 500 is attached to the reflective layer 410. In this way, by setting the reflective layer 410, the refraction and/or reflection efficiency of the LED straight tube lamp can be improved to improve the light source. utilization efficiency, and can improve the brightness of the LED straight tube lamps. For example, the thickness of the reflective layer is 0.5mm-0.8mm; as another example, the thickness of the reflective layer is 0.6mm-0.7mm; as another example, the thickness of the reflective layer is 0.65mm; as another example, the reflective layer The layer is a lamellar structure.

In order to better install the LED sub-light source, for example, the reflective layer is provided with a groove, and part of the LED sub-light source is embedded in the groove; as another example, the LED sub-light source is a rectangular structure In another example, the groove is a rectangular structure, so that the LED sub-light source can be better installed.

In order to strengthen the air circulation between the inside and outside of the cover, thereby improving the heat dissipation performance of the LED straight tube lamp, for example, please refer to FIG. 221 are sequentially distributed in the cover body 220 at intervals, and the inner space of the cover body 220 communicates with the outside world through the cooling holes 221, so that the air circulation degree between the inside and the outside of the cover body can be enhanced, thereby improving the performance of the LED straight tube lamp. thermal performance. For example, the heat dissipation hole is a square hole structure; as another example, the heat dissipation hole is a circular hole structure; as another example, the diameter of the heat dissipation hole is 0.2 mm to 0.5 mm; The diameter is 0.3mm-0.4mm; as another example, the diameter of the cooling hole is 0.35mm.

In order to enhance the dust-proof effect of the cover, for example, a dust filter is arranged in the heat dissipation hole, and the dust filter can filter the dust contained in the air flowing through the heat dissipation hole, so as to prevent the dust from being blown by the air with the air. The dust filter net enters the cover body, so that the dustproof effect of the cover body can be enhanced.

In order to make the light emitted by the LED straight tube luminaire softer, for example, please refer to FIG. On one side of the mounting plate 210, LED sub-light sources 500 and OLED sub-light sources 600 are arranged alternately. In this way, the combined effect of the OLED sub-light sources 600 and the LED sub-light sources 500 can make the light emitted by the LED straight tube lamp softer.

For example, the OLED sub-light source includes an anode transparent glass substrate, an ITO conductive anode, an NPB hole transport layer, an MQA-doped NPB light-emitting layer, an Alq (Alq ₃ ) electron transport layer, an Al conductive cathode, and a cathode transparent glass substrate that are stacked in sequence. Wherein, the fluorescent matrix of the light-emitting layer of the OLED sub-light source is NPB.

Applying a voltage difference of 2V to 10V between the conductive anode and the conductive cathode can make the holes in the anode and the electrons in the cathode be transported to the EL through the hole and electron transport layers respectively, and energy excitation will be generated when the holes and electrons meet in the light-emitting layer. molecules, thereby exciting the light-emitting molecules in the EL to emit green light. Of course, the emission color of each OLED sub-light source is not limited to green light, that is to say, the fluorescent dopant is not limited to MQA, and the fluorescent dopant can also be adjusted according to actual needs. Substance will do. For example, the fluorescent dopant also includes pyrene, rubrene DCM or a mixture thereof, so that the OLED sub-light sources respectively correspond to blue light, yellow light or orange-red light. In this way, the plurality of OLED sub-light sources can respectively have a plurality of different emission colors. For example, the OLED sub-light sources include OLED sub-light sources with different emission colors.

In order to improve the uniformity of illumination of the OLED light source assembly, for example, the OLED sub-light source is a sheet-like structure with a rectangular plane; as another example, the OLED sub-light source has a cross-section combining a rectangle and an arc, and the OLED sub-light source The light source has a thin sheet structure with an arc surface; for another example, a plurality of OLED sub-light sources are arranged in parallel on the reflective film, so that the illumination uniformity of the OLED light source assembly can be improved.

In order to further increase the effective heat dissipation area of the LED straight tube luminaire, thereby improving the heat dissipation performance of the LED straight tube luminaire, for example, please refer to FIG. 700 includes an arc-shaped plate body 710 and a heat dissipation protrusion 720 arranged on the arc-shaped plate body 710. The arc-shaped plate body 710 is arranged outside the cover body 220; The heat dissipation fins are arranged at intervals on the outside of the cover in sequence; as another example, two heat dissipation fins are provided, and the two heat dissipation fins are respectively arranged on both sides of the cover body; The heat dissipation protrusions, a plurality of the heat dissipation protrusions are sequentially arranged on the arc-shaped plate at intervals; for another example, the distance between two adjacent heat dissipation protrusions is equal, so that the LED can be further increased The effective heat dissipation area of the straight tube lamp can improve the heat dissipation performance of the LED straight tube lamp.

In order to further improve the heat dissipation performance of the LED straight tube luminaire, for example, please refer to FIG. The cover body 220 and the heat dissipation pipe 800 are hollow structures, and the interior of the heat dissipation pipe 800 is filled with refrigerant, so that the heat dissipation performance of the LED straight tube lamp can be further improved. For example, the heat dissipation pipe is a circular tubular structure; as another example, the heat dissipation pipe is a square tubular structure.

In order to further improve the heat dissipation performance of the LED straight tube lamps, for example, a plurality of heat dissipation pipes are provided, and an interval is provided between two adjacent heat dissipation pipes; as another example, two adjacent heat dissipation pipes A flow guide pipe is arranged between them; as another example, the heat conduction pipe is a hollow structure, and the heat conduction pipe communicates with the heat dissipation pipe.

The above-mentioned LED straight tube lamps can greatly improve the performance of the above-mentioned LED straight tube lamps by setting the heat dissipation cover 200 and the lamp board 400 against each other, and installing the LED sub-light source 500 on the lamp board 400, and the heat dissipation cover 200 and the lamp board 400 cooperate to dissipate heat. cooling performance.

In order to further improve the heat dissipation performance of the LED straight tube lamp, for example, the heat dissipation cover, the lamp board, the heat dissipation fin and the heat dissipation pipe are all prepared by a new composite heat dissipation alloy, and the new composite heat dissipation alloy It includes a heat absorbing layer, a heat conducting layer, and a heat dissipation layer that are stacked in sequence; as another example, the materials of the heat absorbing layer, the heat conducting layer, and the heat dissipation layer are the same or different; as another example, the LED sub-light sources and The OLED sub-light source is arranged on the heat absorbing layer; as another example, the thermal conductivity of the heat absorbing layer, the heat conducting layer, and the heat dissipation layer decrease successively, forming a gradient of heat conducting performance, thereby further optimizing the novel composite heat dissipation The heat dissipation path of the alloy greatly improves the heat dissipation performance of the heat dissipation cover, the lamp board, the heat dissipation fin and the heat dissipation pipe, and further improves the heat dissipation performance of the LED straight tube lamp. In this way, it can meet the requirements of The heat dissipation requirements of the LED straight tube lamps with large heat generation.

For example, in the LED straight tube lamp according to one embodiment of the present invention, the heat absorbing layer of the new composite 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 sub-light source and OLED sub-light source, and then evenly disperse the heat in the The overall structure of the heat absorbing layer is to prevent heat from accumulating at the contact positions between the LED sub-light source and the OLED sub-light source 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 pure copper material, the ductility, toughness, strength and high temperature resistance of the heat absorption layer are greatly improved, and it is not easy to sinter; in this way, when LED sub-light sources and OLED sub-light sources are installed on the heat absorption layer, it can be Prevent the high temperature generated by the LED sub-light source and the OLED sub-light source from causing damage to the heat-absorbing layer, and having good ductility, toughness and strength can also prevent the heat-absorbing layer from being subjected to excessive heat when the LED sub-light source and the OLED sub-light source are installed. Deformation due to high stress. 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 1.5-4.5 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 absorbing layer. The 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 straight tube lamp according to one embodiment of the present invention, the heat conducting layer of the new composite 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 5-15 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 sub-light source and the OLED sub-light source 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 give the heat-conducting layer yield strength and tensile strength to a certain extent, because the heat-absorbing layer, heat-conducting layer and The heat dissipation layer is integrally formed by stamping, 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 new composite 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 straight tube lamp according to one embodiment of the present invention, the heat dissipation layer of the novel composite 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 above-mentioned 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. After the heat conduction layer partially dissipates heat, 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 also includes niobium (Nb) with a mass fraction of 0.05 to 0.08 parts. After many experiments and theoretical analysis, it is found that when the mass fraction of niobium When it is greater than 0.05 part, the anti-oxidation performance of the heat dissipation layer can be greatly improved. It can be understood that the heat dissipation layer, as the component with the largest contact area with the outside air in the LED street lamp heat sink, has higher 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 straight tube lamp.

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. It has an unexpected effect. 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 new composite heat dissipation alloy is sequentially stacked with the heat absorbing layer, the heat conduction layer and the heat dissipation layer, and the heat conduction performance of the heat absorbing layer, the heat conduction layer and the heat dissipation layer decreases successively, forming a heat conduction Performance gradient, compared with pure copper material, the weight is greatly reduced under the premise of ensuring the heat dissipation performance; compared with the aluminum alloy that exists in large quantities on the market, the heat dissipation performance is greatly enhanced.

It should be noted that other embodiments of the present invention also include LED straight tube lamps that can be implemented by combining the technical features of the above 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 LED straight tube lamp, characterized in that it comprises: A light-transmitting cover, the light-transmitting cover is an arc-shaped structure, and the end of the light-transmitting cover is extended and bent to form a sliding part; A heat dissipation cover, the heat dissipation cover includes a mounting plate and a cover body, the cover body is an arc-shaped structure, the two ends of the cover body are respectively connected to the two sides of the mounting plate, and the side edges of the mounting plate Extend and bend to form a bent part, the bent part and the end of the cover form a sliding groove, the sliding part is slidably arranged in the sliding groove, and the cover is provided with a plurality of cooling holes , a plurality of the heat dissipation holes are sequentially distributed in the cover at intervals, and the inner space of the cover communicates with the outside through the heat dissipation holes; a lamp cap, the lamp cap is connected to the end of the mounting plate; a light board, the light board is attached to a side of the mounting plate away from the cover; and A plurality of LED sub-light sources, the plurality of LED sub-light sources are sequentially arranged at intervals on a side of the lamp board away from the installation board. 2. The LED straight tube lamp according to claim 1, wherein the cooling holes are square hole-shaped structures. 3. The LED straight tube lamp according to claim 1, wherein the heat dissipation hole is a circular hole-shaped structure. 4 . The LED straight tube lamp according to claim 3 , wherein the diameter of the cooling hole is 0.2mm˜0.5mm. 5 . The LED straight tube lamp according to claim 4 , wherein the diameter of the cooling hole is 0.3mm˜0.4mm. 6. The LED straight tube lamp according to claim 5, wherein the diameter of the cooling hole is 0.35mm. 7. The LED straight tube lamp according to claim 1, wherein a dust filter is arranged in the heat dissipation hole.