Waterproof packaging structure of outdoor LED linear lamp

Abstract

The invention belongs to the technical field of LED packaging, and particularly relates to a waterproof packaging structure of an outdoor LED linear lamp. The hollow structure of the outer shell is communicated with the inner cavity and provided with air holes, and the hollow structure of the outer shell is filled with a water-absorbing material; the ventilation assembly comprises two connecting blocks and a movable block which are symmetrically arranged, an opening is formed between the two connecting blocks, the opening is communicated with the inner cavity and the outside, and the inclined angles of the edges of the connecting blocks are matched with the inclined angles of the edges of the two connecting blocks; and the movable block is movably clamped in the opening and moves up and down to close and open the opening, so that gas exchange is realized by opening the opening to dry the water-absorbing material, the water-absorbing capacity of the water-absorbing material is ensured, and the water-absorbing material is reused.

Description

Technical Field

[0001] The invention belongs to the technical field of LED packaging, and in particular relates to a waterproof packaging structure for an outdoor LED linear lamp. Background Art

[0002] LEDs are widely used to illuminate ornamental trees in scenic areas due to their excellent performance. However, LEDs inevitably generate heat during the light-emitting process, which poses a certain challenge to the stability and life of LEDs. Especially in outdoor application environments, seasonal temperature changes place higher demands on the performance of LED lamps.

[0003] In the cold winter, the ambient temperature drops sharply, and the heat generated by the LED chip inside the LED lamp when it is working makes the temperature inside the lampshade relatively high. This significant temperature difference between the inside and outside causes condensation on the inner surface of the lampshade, that is, the water vapor in the air condenses into water droplets when it is cold, which is the so-called condensation. The existence of condensation not only affects the light transmittance of the LED lamp, but is also likely to directly contact the LED chip and its circuit, causing circuit short circuit, corrosion or performance degradation, and even damage to the LED chip in severe cases, greatly shortening the service life of the LED lamp.

[0004] To solve this problem, the industry usually adopts two methods: one is to enhance the heat dissipation performance of LED lamps, and the other is to ensure the dryness of the internal environment of the lampshade. In terms of heat dissipation, although the operating temperature of LED chips can be effectively reduced by optimizing the layout of LED chips, using high-efficiency heat dissipation materials, and designing a reasonable heat dissipation structure, these measures, while improving the heat dissipation efficiency, also further aggravate the temperature difference between the inside and outside of the lampshade, which may promote the formation of condensation beads, especially in LED lamps with good sealing. This problem is particularly prominent.

[0005] On the other hand, in order to keep the inside of the lampshade dry, some LED lamps are designed with absorbent materials, such as silica gel and desiccant, to absorb possible condensed water. Although this method alleviates the problem of water beads to a certain extent, the absorbent material tends to dry slowly after absorbing water, and it takes a long time to restore its water absorption capacity. This is not an ideal long-term solution for outdoor LED lamps that frequently experience temperature changes. If the absorbent material is not replaced in time after being saturated, it may increase the internal humidity and cause more serious damage to the LED.

[0006] Therefore, a technology is needed to solve the above problems and quickly restore the drying capacity of the water-absorbing material to ensure the water absorption performance of the water-absorbing material. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides a waterproof packaging structure for outdoor LED linear lamps, which solves the problem of condensation beads being generated on the surface of the lamp source due to excessive temperature difference between the surrounding environment and the external environment when the lamp source is working.

[0008] The object of the present invention can be achieved by the following technical solution: A waterproof packaging structure for an outdoor LED linear lamp, comprising an outer shell, a transparent lamp cover buckled at an opening of the outer shell, and a lamp source arranged in the inner cavity of the outer shell, wherein the outer shell is arranged as a hollow structure; The hollow structure of the outer shell is connected to the inner cavity and is provided with air holes, and the hollow structure of the outer shell is filled with water-absorbing material; It also includes a ventilation assembly arranged on the outer shell, the ventilation assembly includes two symmetrically arranged connection blocks and a movable block, there is an opening between the two connection blocks, the opening connects the inner cavity and the outside, the inclination angle of the edge of the connection block is adapted to the inclination angle of the edges of the two connection blocks, the movable block is movably connected in the opening and closes and opens the opening by moving up and down, the two ends of the connection block are respectively connected to the two connection blocks by springs, when the light source is turned on, the air pressure in the inner cavity rises and pushes the movable block outward to close the opening; When the light source is turned off, the air pressure in the inner cavity drops, and the spring rebounds to cause the movable block to contract inward to open the opening. The gas exchange between the inner cavity and the outside realizes the drying of the water-absorbing material, and the central axis of the movable block coincides with the symmetry line of the two connecting blocks.

[0009] Preferably, it also includes a waterproof shell and a light-transmitting outer cover which are sleeved on the outside of the outer shell, the inner cavity of the waterproof shell realizes gas exchange with the outside through a waterproof breathable valve, and the opening of the ventilation component is connected to the inner cavity of the waterproof shell.

[0010] Preferably, the waterproof shell is a hollow structure, and the hollow structure of the waterproof shell is filled with heat-conducting material.

[0011] Preferably, the inner wall of the transparent lamp cover is provided with a reflective layer.

[0012] Preferably, it further comprises a wire box for placing a power line, and a waterproof colloid is provided at the connection between the wire box and the outer shell.

[0013] Preferably, the hollow structure of the outer shell is also filled with dry material.

[0014] Preferably, it further comprises a waterproof coating, wherein the waterproof coating is adhered to the outer surface of the waterproof shell, and the material of the waterproof shell is polycarbonate.

[0015] Preferably, retractable rubber strips are provided in both springs.

[0016] Preferably, waterproof sealing rings are provided between the edge of the waterproof shell and the light-transmitting outer cover, and between the outer shell and the light-transmitting lamp cover.

[0017] The beneficial effects of the present invention are: By setting up the ventilation assembly, when the light source is turned on, the air pressure in the inner cavity of the waterproof shell is higher than that in the outside world, which will push the movable block to lock the opening to absorb and dry the inner cavity. When the light source is turned off, the piston returns to its position, the opening is opened, and the inner cavity of the waterproof shell is connected to the inner cavity of the waterproof shell through the breathable valve, so that the inner cavity of the shell is connected to the outside world again, and the water-absorbing material itself is dried through gas exchange. And through the buffering of the inner cavity of the waterproof shell, the temperature difference between the inner cavity of the shell and the outside world is balanced to avoid the temperature difference being too large, which will cause the subsequent generation of new condensation beads.

[0018] By designing the outer shell and the waterproof shell as a hollow structure, the heat dissipation speed of the lamp can be effectively improved, thereby quickly reducing the internal temperature of the lamp and ensuring the stable operation of the LED light source. In addition, heat dissipation material is arranged in the outer shell. The combination of the hollow structure and the thermal conductive material reduces the thermal resistance, so that heat can be transferred more smoothly. That is, the formation of condensation beads is reduced through multi-layer conduction of the heat generated by the lamp source, avoiding the temperature difference caused by the direct collision between the temperature of the lamp source and the external temperature, and further reducing the possibility of condensation beads forming on the outer surface of the lamp source located in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 The ventilation assembly of the present invention; Figure 2 is a cross-sectional schematic diagram of the outer shell of the present invention; Figure 3 It is a schematic diagram of the external structure of the present invention; Main component symbols In the figure: 1. outer shell; 2. light source; 3. air vent; 4. waterproof outer shell; 5. connecting block; 6. movable block. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0022] See also Figure 1-Figure 3 , This embodiment provides an outdoor LED linear lamp waterproof packaging structure, including an outer shell 1, a transparent lamp cover buckled at the opening of the outer shell 1, and a lamp source 2 arranged in the inner cavity of the outer shell 1, and the outer shell 1 is set as a hollow structure; The hollow structure of the outer shell 1 is connected to the inner cavity and is provided with a plurality of air holes 3, and the hollow structure of the outer shell 1 is filled with water-absorbing material; It also includes a ventilation assembly arranged on the outer shell 1, and the ventilation assembly includes two symmetrically arranged connection blocks 5 and a movable block 6. There is an opening between the two connection blocks 5, and the opening connects the inner cavity and the outside. The inclination angle of the edge of the connection block 5 is adapted to the inclination angle of the edges of the two connection blocks 5. The movable block 6 is movably connected in the opening to close and open the opening by moving up and down. The two ends of the connection block 5 are respectively connected to the two connection blocks 5 by springs. When the light source 2 is turned on, the air pressure in the inner cavity rises to push the movable block 6 outward to close the opening. When the light source 2 is turned off, the air pressure in the inner cavity drops, and the spring rebounds to make the movable block 6 contract inward to open the opening. The gas exchange between the inner cavity and the outside realizes the drying of the water-absorbing material. The central axis of the movable block 6 coincides with the symmetry line of the two connection blocks 5.

[0023] Since temperature difference is one of the key factors leading to the formation of condensed water, when the surface temperature of a cold object (such as a cooler, window, etc.) is lower than the dew point temperature of the surrounding air, the water vapor in the air will condense into water droplets on the surface of the cold object. Therefore, reducing the ambient temperature difference can reduce this temperature difference driven condensation phenomenon. Since the temperature of the internal light source 2 is extremely high when the lamp is turned on, in the cold winter, the temperature of the inner cavity of the outer shell 1 is greatly different from the external environment, and the water vapor in the air is easy to condense into water droplets on the surface of the light source 2, affecting the lighting effect and the electrical performance of the lamp.

[0024] The water vapor saturation in the air is also one of the key factors that determine whether it can condense into condensation beads. When the water vapor content in the air exceeds its saturation at the current temperature, the excess water vapor combined with the temperature difference is easy to condense into condensation beads on the surface of the object with high temperature. Therefore, in order to prevent the formation of condensation beads on the inner surface of the outer shell 1, the hollow structure of the outer shell 1 is filled with a water-absorbing material. Since the hollow structure of the outer shell 1 and the inner cavity are connected through the air vent 3, the water-absorbing material absorbs water from the inner cavity of the outer shell 1 to reduce the humidity of the air in the inner cavity. Reducing the humidity of the inner cavity means reducing the content of water vapor in the air in the inner cavity, thereby reducing the possibility that the surface of the light source 2 or the inner wall of the outer shell 1 can condense into condensation beads, thereby achieving the drying of the LED light source 2. The water-absorbing material is made of diatomaceous earth, bamboo charcoal or silica gel, which can achieve the water absorption function and can also achieve the water absorption function after drying again.

[0025] In the design of the above structure, since the outer shell 1 and the transparent lamp cover seal the light source 2, the drying period of the water-absorbing material after absorbing water will be relatively prolonged without the help of external force. Due to the characteristics of landscape lamps, they are generally not turned on during the day, so a ventilation component is designed to achieve the drying of the water-absorbing material itself by connecting to the outside world for ventilation in dry and cold places, so that when the next water absorption is needed, the water-absorbing material can play its function and absorb water from the inner cavity of the outer shell 1. Through the cooperation of the two connecting blocks 5 and the movable block 6, when the light source 2 is turned on, the opening is closed, and the water-absorbing material dries the inner cavity of the outer shell 1. When the light source 2 is turned off, the opening is opened to achieve gas exchange, so that the water-absorbing material can complete its own drying. Since the temperature of the light source 2 is very high, the high temperature will cause the air pressure in the relatively closed inner cavity of the outer shell 1 to rise, causing the air pressure in the inner cavity of the outer shell 1 to be higher than the external air pressure. Therefore, the air pressure higher than the external air pressure will produce an extrusion effect on the movable block 6, pushing the movable block 6 outward. Due to the structural design of the connecting block 5 and the movable block 6, that is, the inclination angles of the edges of the movable block 6 and the two connecting blocks 5 cooperate with each other, when the air pressure of the outer shell 1 is consistent with the external pressure, the opening is open to achieve gas exchange. Of course, in order to ensure the sealing of the device, the spring and the retractable rubber strip set in the spring cooperate with each other to achieve better extension and contraction of the movable block 6. When the light source 2 is turned off, the temperature of the inner cavity of the outer shell 1 will gradually decrease to the outdoor temperature, and the air pressure in the inner cavity of the outer shell 1 will also gradually decrease to the external air pressure. The movable block 6 is no longer squeezed by the air pressure in the inner cavity of the outer shell 1. Then, due to the elastic effect of the spring and the rubber strip, the movable block 6 is driven to retract to achieve the opening. The gas exchange realizes the self-drying of the water-absorbing material. The opening here does not mean a complete opening, but only a gas exchange between the inner cavity of the outer shell 1 and the outside can be achieved.

[0026] As mentioned above, due to the large temperature difference and the presence of water vapor, condensation beads will be generated. In a short period of time after the LED light source 2 is turned off, even after the air pressure in the inner cavity of the outer shell 1 gradually decreases to the outside air pressure, the air pressure is slowly decreasing, and the thrust on the movable block 6 is decreasing. Then, the gap between the movable block 6 and the two connecting blocks 5 will become larger, that is, the cold air from the outside will enter the inner cavity of the outer shell 1. In order to prevent the cold air entering the inner cavity of the outer shell 1 from causing condensation beads to be generated again on the inner wall of the outer shell 1 or the light source 2, it also includes a waterproof outer shell 4 and a light-transmitting outer cover that are sleeved on the outside of the outer shell 1. The inner cavity of the waterproof outer shell 4 realizes gas exchange with the outside through a waterproof breathable valve, and the opening of the ventilation component is connected to the inner cavity of the waterproof outer shell 4, which is equivalent to the cold air from the outside first entering the inner cavity of the waterproof outer shell 4 and then entering the inner cavity of the outer shell 1, thereby playing a role in buffering the temperature difference between the inner cavity of the outer shell 1 of the light source 2 and the outside. A water-absorbing layer is detachably provided on the waterproof breathable valve, and in order to ensure the water-absorbing effect of the water-absorbing layer, a humidity sensor is provided in the water-absorbing layer. The humidity in the water-absorbing layer is monitored by the humidity sensor, that is, a threshold is preset in the humidity sensor. When the detection value of the humidity sensor is greater than or equal to the threshold, it indicates that the water-absorbing layer is about to be saturated and needs to be replaced to avoid affecting the waterproof effect of the waterproof breathable valve. At this time, the humidity sensor sends a request for the water-absorbing layer to be replaced to the operator, and the operator replaces it. The humidity sensor is electrically connected to the control terminal to send the replacement information.

[0027] Continuing from the previous embodiment, in order to promptly respond to the replacement request sent by the humidity sensor, the inner cavity of the waterproof housing 4 also includes a spare waterproof breathable valve, and the spare breathable waterproof valve is electrically connected to the control terminal. When the control terminal receives the replacement request from the humidity sensor, the control terminal starts the waterproof breathable valve and responds promptly.

[0028] In one embodiment, the control terminal includes statistics on the life of the water-absorbing material, that is, recording the usage time, and replacing the water-absorbing material in time according to the usage time limit specified by the factory settings of the water-absorbing material.

[0029] To increase the heat dissipation effect, the waterproof shell 4 is a hollow structure, and the hollow structure of the waterproof shell 4 is filled with thermal conductive material. The side walls of the waterproof shell 4 are coated with a thermal conductive coating to enhance the heat dissipation effect, and heat dissipation fins are arranged on the outer surface of the shell body 1.

[0030] In one embodiment, it also includes a light-transmitting outer cover buckled at the opening of the waterproof shell 4. Since the lamp is light-transmitting downward, the edge of the light-transmitting outer cover is connected to the inner wall of the waterproof shell 4. The inner cavity of the waterproof shell 4 is provided with a waterproof platform and a glue injection port for injecting waterproof glue, that is, the waterproof platform is closer to the inside than the light-transmitting outer cover. After the glue injection is completed, the waterproof glue seals the upper part of the light-transmitting outer cover and the inner wall of the waterproof shell 4. The waterproof ability of the lamp is enhanced by injecting waterproof glue through the glue injection port. The waterproof glue can effectively prevent external moisture from penetrating into the interior of the lamp, protect the internal light source 2 from being affected by moisture, thereby extending the service life of the lamp. The light-transmitting outer cover and the inner wall of the waterproof shell 4 are locked by threaded cooperation. The light-transmitting outer cover and the inner wall of the waterproof shell 4 are locked by threaded cooperation. This mechanical connection method is not only simple and reliable, but also can ensure that the light-transmitting outer cover is not easy to loosen or fall off during long-term use, thereby enhancing the overall stability of the lamp.

[0031] In one embodiment, a reflective layer is provided on the inner wall of the transparent lamp cover. This design can reflect and focus the light emitted by the lamp source 2, improve the utilization rate and uniformity of the light, and make the lighting effect of the lamp brighter and more uniform. At the same time, the reflective layer can also reduce the scattering and loss of light, and improve the overall lighting effect of the lamp source 2.

[0032] In one embodiment, it also includes a wire box for placing a power cord, and the wire box is used for electrical connection, which not only allows the power cord to be arranged in an orderly manner to reduce the risk of confusion and damage, but also provides additional protection for the power cord to prevent it from being eroded or mechanically damaged by water vapor in the external environment. In order to further improve the waterproof performance of the connection between the wire box and the outer shell 1, the connection between the wire box, the outer shell 1 and the waterproof shell 4 is provided with a waterproof colloid, and the waterproof colloid is a thermal expansion and contraction material. As mentioned above, a large amount of heat will be generated when the lamp source 2 is working, and part of the heat will be conducted to the waterproof colloid, and the power cord itself will also generate a certain amount of heat, so the waterproof colloid at the connection between the wire box and the outer shell 1 and the waterproof shell 4 is designed to be a material with a relatively large thermal expansion coefficient. When the lamp source 2 is working, the two connections can be further locked. It also includes a waterproof coating, which is fitted on the outer surface of the outer shell 1, and the material of the waterproof shell 4 is polycarbonate, which further improves the ability of the waterproof shell 4 to resist external water vapor, thereby further improving the waterproof performance of the lamp.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A waterproof packaging structure for an outdoor LED linear lamp, comprising an outer shell, a transparent lamp cover buckled at an opening of the outer shell, and a lamp source arranged in an inner cavity of the outer shell, characterized in that: The outer shell is configured as a hollow structure; The hollow structure of the outer shell is connected to the inner cavity and is provided with a vent hole, and the hollow structure of the outer shell is filled with a water-absorbent material; It also includes a ventilation component arranged on the outer shell, the ventilation component includes two symmetrically arranged connection blocks and a movable block, there is an opening between the two connection blocks, the opening connects the inner cavity and the outside, the inclination angle of the edge of the connection block is adapted to the inclination angle of the edges of the two connection blocks, the movable block is movably connected in the opening and closes and opens the opening by moving up and down, the two ends of the connection block are respectively connected to the two connection blocks by springs, when the light source is turned on, the air pressure in the inner cavity rises and pushes the movable block outward to close the opening; When the light source is turned off, the air pressure in the inner cavity drops, the spring rebounds to cause the movable block to contract inward to open the opening, the gas exchange between the inner cavity and the outside realizes the drying of the water-absorbing material, and the central axis of the movable block coincides with the symmetry line of the two connecting blocks.

2. The waterproof packaging structure of an outdoor LED linear lamp according to claim 1, characterized in that: It also includes a waterproof shell and a light-transmitting outer cover which are sleeved on the outside of the outer shell. The inner cavity of the waterproof shell realizes gas exchange with the outside through a waterproof breathable valve, and the opening of the ventilation component is connected to the inner cavity of the waterproof shell.

3. The waterproof packaging structure of an outdoor LED linear lamp according to claim 2, characterized in that: The waterproof shell is a hollow structure, and the hollow structure of the waterproof shell is filled with heat-conducting material.

4. The waterproof packaging structure of an outdoor LED linear lamp according to claim 1, characterized in that: The inner wall of the transparent lamp cover is provided with a reflective layer.

5. The waterproof packaging structure of an outdoor LED linear lamp according to claim 4, characterized in that: It also includes a wire box for placing a power line, and waterproof colloid is arranged at the connection between the wire box, the waterproof shell and the outer shell.

6. The waterproof packaging structure of an outdoor LED linear lamp according to claim 1, characterized in that: The hollow structure of the outer shell is also filled with dry material.

7. The waterproof packaging structure of an outdoor LED linear lamp according to claim 2, characterized in that: It also includes a waterproof coating, which is adhered to the outer surface of the waterproof shell, and the material of the waterproof shell is polycarbonate.

8. The waterproof packaging structure of an outdoor LED linear lamp according to claim 1, characterized in that: Retractable rubber strips are arranged in the two springs.

9. The waterproof packaging structure of an outdoor LED linear lamp according to claim 7, characterized in that: Waterproof sealing rings are arranged between the edge of the waterproof shell and the light-transmitting outer cover, and between the outer shell and the light-transmitting lamp cover.

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