LED panel lamp

Abstract

The invention provides an LED panel lamp. The LED panel lamp comprises a shell, a support and a lighting assembly. The shell comprises a heat dissipation seat, an outer shell, an inner shell and a central shell, the heat dissipation seat is provided with a plurality of heat dissipation fins, the inner shell is arranged on the heat dissipation seat, the outer shell wraps the inner shell, the inner shell and the heat dissipation seat jointly define a mounting cavity, the central shell penetrates through the inner shell and then is connected with the heat dissipation seat, and the inner wall of the central shell and the heat dissipation seat jointly define a light-transmitting chamber; the lighting assembly comprises a control panel located in the installation cavity, an LED lamp panel, a light uniformizing piece and a light-transmitting cylinder, the LED lamp panel, the light uniformizing piece and the light-transmitting cylinder are located in the light-transmitting chamber, the LED lamp panel is attached to the heat dissipation base, and the light uniformizing piece is attached to the inner wall of the light-transmitting cylinder. The radiating seat is attached to the LED lamp panel, so that the LED lamp panel can be quickly radiated, and the LED panel lamp can run for a long time; the inner shell is additionally arranged to specially contain the control panel, the control panel is separated from other accessories, the sealing performance is improved, the difficulty of external water vapor permeation is increased, and therefore the probability that the LED panel lamp breaks down when used in a humid environment is reduced.

Description

Technical Field

[0001] The invention relates to the field of lighting, and in particular to an LED flat panel lamp. Background Art

[0002] Flat panel lights are often used for fill-in lighting at the photography scene. The photographer needs to constantly adjust the lighting angle according to the shooting angle, so the flat panel lights need to be easy to carry. Especially when shooting in outdoor scenes, the scenery changes with time and weather factors, and the shooting task is heavy. It is often necessary to configure multiple flat panel lights for alternating use to meet the long-term fill-in lighting needs.

[0003] Furthermore, when used in a humid environment (such as rainy days or at the seaside), the flat panel light is at risk of getting damp, and moisture intruding into the flat panel light can easily cause malfunctions.

[0004] Therefore, how to improve the heat dissipation capacity of the flat panel light so that it can operate for a long time and improve the adaptability of the flat panel light to a humid environment is a problem that needs to be solved. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an LED flat panel lamp to improve the heat dissipation capacity of the flat panel lamp so that it can operate for a long time and improve the adaptability of the flat panel lamp to a humid environment.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] An LED flat panel light, comprising: a housing, a bracket and a lighting assembly;

[0008] The shell comprises a heat sink, an outer shell, an inner shell and a central shell, the heat sink is provided with a plurality of heat sinks, the inner shell is arranged on the heat sink, the outer shell wraps the inner shell, the inner shell and the heat sink together form a mounting cavity, the central shell is connected to the heat sink after passing through the inner shell, and the inner wall of the central shell and the heat sink together form a light-transmitting chamber;

[0009] The bracket is connected to the heat sink;

[0010] The lighting assembly includes a control board located in the installation cavity and an LED light board, a light homogenizer, and a light-transmitting tube located in the light-transmitting chamber. The LED light board is fitted with the heat sink, the LED light board is electrically connected to the control board, and the lamp beads on the LED light board are facing the light-transmitting tube, and the light homogenizer is attached to the inner wall of the light-transmitting tube.

[0011] In one embodiment, a gap is provided between the LED light board and the light-transmitting tube so that the light-transmitting tube is connected with the light-transmitting chamber.

[0012] In one of the embodiments, a sealing cover is further provided in the shell, and the sealing cover is provided on the control board. The sealing cover is bonded to the heat sink by glue, and a wiring hole is provided on one side of the sealing cover close to the LED light board.

[0013] In one of the embodiments, a avoidance groove is provided on one side of the central shell close to the control panel, and the avoidance groove is used to connect the light-transmitting chamber and the installation cavity; a blower assembly is provided in the avoidance groove, and the blower assembly includes a sealing block and two wind wheels, and a blower chamber and an air duct running through the blower chamber are provided on the sealing block, and the wind wheel is rotatably arranged in the blower chamber; the wind wheel is provided with a plurality of toothed blades, and the toothed blades on the two wind wheels are meshed with each other, and the air duct is facing the meshing position of the toothed blades, and the toothed blades are in contact with the inner wall of the blower chamber, and the toothed blades are used to guide the airflow from the light-transmitting chamber to the installation cavity and blow it toward the sealing cover.

[0014] In one embodiment, the portion of the toothed blade that contacts the inner wall of the blast chamber is in an arc shape.

[0015] In one of the embodiments, the blocking block and the avoidance groove are bonded together by glue.

[0016] In one of the embodiments, the housing further includes a heat dissipation fan, and the heat dissipation fan faces the heat sink.

[0017] In one of the embodiments, corner guards are provided on the edges of the shell.

[0018] In one embodiment, the bracket includes an L-shaped frame, a fixing cap, a resistance sheet, a U-shaped clip, a pull rod, a handle and a locking block. The fixing cap is arranged on the heat sink, and the resistance sheet is arranged on the fixing cap. The diameter of the resistance sheet is larger than the diameter of the fixing cap. The locking block is arranged on the L-shaped frame. The locking block is provided with a bolt, and the bolt is used to connect with the fixing cap. The U-shaped clip is provided with two clips, and the two clips are respectively located on both sides of the resistance sheet. The pull rod is passed through the two clips, and the pull rod is threadedly connected to the handle. The handle is rotated so that the clips clamp the resistance sheet.

[0019] In one embodiment, the lighting assembly further includes a panel, which is disposed on a side of the heat sink away from the inner shell, and is electrically connected to the control board, and includes a display screen, operation keys, a knob, and a DM connector.

[0020] The above LED flat panel lamp has the following beneficial effects:

[0021] 1. The heat sink is attached to the LED light board, which can quickly dissipate the heat of the LED light board, so that the LED flat panel light can run for a long time;

[0022] 2. Add an inner shell to specifically accommodate the control board, separate the control board from other accessories, improve the sealing, and increase the difficulty of external water vapor infiltration, thereby reducing the probability of failure of the LED flat panel light when used in a humid environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the front structure of the LED flat panel light;

[0025] Figure 2 A schematic diagram of the disassembly of the housing and lighting components;

[0026] Figure 3 It is a partial cross-sectional view of the LED flat panel light;

[0027] Figure 4 This is a schematic diagram of the back structure of the LED flat panel light;

[0028] Figure 5 The figure is a schematic diagram of the bracket disassembly;

[0029] Figure 6 It is a schematic diagram of the distribution of the installation cavity and the light-transmitting chamber;

[0030] Figure 7 It is a schematic diagram of the structure of the air blast assembly. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented 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 thoroughly understood.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] See also Figure 1 The present invention provides an LED flat panel lamp 10, which includes: a shell, a bracket 200 and a lighting component.

[0035] See also Figure 3 and Figure 6 The housing includes a heat sink 110, an outer shell 120, an inner shell 130 and a central shell 140. The heat sink 110 is provided with a plurality of heat sinks 111. The inner shell 130 is arranged on the heat sink 110. The outer shell 120 wraps the inner shell 130. The inner shell 130 and the heat sink 110 together form a mounting cavity 11. The central shell 140 is connected to the heat sink 110 after passing through the inner shell 130. The inner wall of the central shell 140 and the heat sink 110 together form a light-transmitting chamber 12.

[0036] The bracket 200 is connected to the heat sink 110;

[0037] See also Figure 2 and Figure 3 The lighting assembly includes a control board 310 located in the installation cavity 11 and an LED light board 320, a light homogenizer 330, and a light-transmitting tube 340 located in the light-transmitting chamber 12. The LED light board 320 is attached to the heat sink 110, the LED light board 320 is electrically connected to the control board 310, and the lamp beads on the LED light board 320 are facing the light-transmitting tube 340, and the light homogenizer 330 is attached to the inner wall of the light-transmitting tube 340.

[0038] See also Figure 3 and Figure 4 Preferably, the shell also includes a cooling fan 160, and the cooling fan 160 faces the heat sink 111. Since the LED light board 320 is in contact with the heat sink 110, the heat generated by the LED light board 320 during operation is directly transferred to the heat sink 111. The cooling fan 160 blows air toward the heat sink 111 to further accelerate the heat dissipation speed.

[0039] See also Figure 4 In one embodiment, a corner guard 170 is provided on the edge of the housing, and the lighting assembly further comprises a panel, which is provided on a side of the heat sink 110 away from the inner housing 130, and is electrically connected to the control board 310, and comprises a display screen 351, operation keys 352, a knob 353 and a DM connector 354. The user can operate the flat panel light through the operation keys 352 and the knob 353 on the panel, and judge the operation status of the flat panel light through the display screen 351.

[0040] The LED flat panel lamp 10 has the following beneficial effects:

[0041] 1. The heat sink 110 is attached to the LED light board 320, which can quickly dissipate heat from the LED light board 320, so that the LED flat panel light 10 can operate for a long time;

[0042] 2. An inner shell 130 is added to specifically accommodate the control board 310, separate the control board 310 from other accessories, improve the sealing, and increase the difficulty of external water vapor infiltration, thereby reducing the probability of failure of the LED flat panel light 10 when used in a humid environment.

[0043] See also Figure 2 and Figure 3 In order to improve the waterproof and dustproof capabilities of the LED flat panel lamp 10, in one embodiment, a gap is provided between the LED light board 320 and the light-transmitting tube 340 so that the light-transmitting tube 340 is connected to the light-transmitting chamber 12. A sealing cover 150 is also provided in the housing. The sealing cover 150 is provided on the control board 310. The sealing cover 150 and the heat sink 110 are adhered by glue. A wiring hole 151 is provided on one side of the sealing cover 150 close to the LED light board 320. The sealing cover 150 can improve the sealing performance of the control board 310, and further increase the difficulty of water vapor and dust contacting the control board 310.

[0044] In the above embodiment, the sealing of the control board 310 is increased to prevent external water vapor from entering the LED flat panel light 10 and adhering to the control board 310, so as to reduce the probability of failure when the LED flat panel light 10 is used in a humid environment. However, when the LED flat panel light 10 is placed in a humid environment for a long time to provide lighting, water vapor in the environment can still enter the control board 310 through the gaps (such as the wiring holes 151), and the low temperature in a humid environment will reduce the electrical performance of the electronic components on the control board 310, resulting in the LED flat panel light 10 being unable to operate in a humid environment for a long time.

[0045] See also Figure 6 and Figure 7 To solve the above problem, a side of the central shell 140 close to the control board 310 is provided with an escape groove 141, and the escape groove 141 is used to connect the light-transmitting chamber 12 and the installation cavity 11;

[0046] A blowing assembly 400 is provided in the avoidance groove 141, and the blowing assembly 400 includes a blocking block 410 and two wind wheels 420. A blowing chamber 411 and an air duct 412 passing through the blowing chamber 411 are opened on the blocking block 410, and the wind wheel 420 is rotatably arranged in the blowing chamber 411; preferably, the blocking block 410 and the avoidance groove 141 are bonded by glue.

[0047] The wind wheel 420 is provided with a plurality of toothed blades 421. The toothed blades 421 on the two wind wheels 420 are meshed with each other. The air duct 412 faces the meshing position of the toothed blades 421. The toothed blades 421 are fitted with the inner wall of the blower chamber 411. The toothed blades 421 are used to guide the airflow from the light-transmitting chamber 12 to the installation cavity 11 and blow it toward the sealing cover 150.

[0048] Preferably, the portion of the toothed blade 421 that contacts the inner wall of the blast chamber 411 is in an arc shape, so as to reduce the friction between the toothed blade 421 and the inner wall of the blast chamber 411 .

[0049] The principle by which the air blowing assembly 400 enables the LED flat panel light 10 to operate for a long time in a humid environment is as follows:

[0050] The air blowing assembly 400 is activated only when the LED flat panel light 10 is placed in a humid environment;

[0051] One of the two wind wheels 420 is connected to the built-in motor in a transmission manner, that is, one of them is a driving wheel and the other wind wheel 420 is a driven wheel. Since the toothed blades 421 on the two wind wheels 420 are meshed with each other, when one of the wind wheels 420 rotates, the toothed blades 421 can drive the other wind wheel 420 to rotate synchronously.

[0052] The air duct 412 runs through the blast chamber 411, and the air duct 412 faces the meshing position of the toothed blades 421. When the wind wheel 420 rotates, the gas can be driven to flow from the light-transmitting chamber 12 to the installation cavity 11. Since the LED light board 320 generates heat when it runs for a long time, the temperature in the light-transmitting chamber 12 will be higher than the temperature in the installation cavity 11. When the gas is driven into the installation cavity 11, the heated gas can be used to dry the water vapor on the surface of the control board 310 to keep it dry, and the temperature of the control board 310 can be increased to prevent it from running in a low-temperature environment.

[0053] The specific process of guiding the gas flow when the wind wheel 420 rotates is as follows: Figure 7As shown, the left wind wheel 420 rotates counterclockwise, and the right wind wheel 420 rotates clockwise. The upper part is the location of the light-transmitting chamber 12, and the lower part is the location of the installation chamber 11. The air duct 412 is divided into an upper air chamber 1 and a lower air chamber 2 by meshing toothed blades 421. When the wind wheel 420 rotates, the air is pulled to move in the direction of the movement of the toothed blades 421. The air follows the toothed blades 421 from the upper air chamber 1 to the small air chamber 3 surrounded by the toothed blades 421 and the inner wall of the blast chamber 411. As the space becomes smaller, the air is compressed when entering the small air chamber 3, and the air pressure increases. The toothed blades 421 continue to rotate and roll the compressed air in the small air chamber 3 to the lower air chamber 2. At this time, the space becomes larger, and the pressurized air is released and passes through the air duct 412 into the installation chamber 11. The gas flows in the direction indicated by the arrow. In this way, the toothed blades 421 keep rotating, and the gas in the light-transmitting chamber 12 can be continuously transported to the light-transmitting chamber 12.

[0054] It should be emphasized that the blower assembly 400 is only started when the LED flat panel lamp 10 is in a humid environment and runs for a long time. It utilizes the heat generated when the LED lamp panel 320 is lit, and cooperates with the wind wheel 420 to guide the airflow to the control board 310, so as to achieve the purpose of drying the water vapor on the surface of the control board 310 and heating the control board 310. The user can manually turn off the blower assembly 400 to stop supplying hot air to the installation cavity 11. When the wind wheel 420 stops rotating, the toothed blades 421 are in a state of mutual meshing, which can form a barrier in the air duct 412 to prevent the hot air in the light-transmitting chamber 12 from rushing into the installation cavity 11 when it is not necessary.

[0055] See also Figure 5 In one embodiment, the bracket 200 includes an L-shaped frame 210, a fixing cap 220, a resistance sheet 230, a U-shaped clip 240, a pull rod 250, a handle 260 and a locking block 270. The fixing cap 220 is arranged on the heat sink 110, and the resistance sheet 230 is arranged on the fixing cap 220. The diameter of the resistance sheet 230 is larger than the diameter of the fixing cap 220; the locking block 270 is arranged on the L-shaped frame 210, and a bolt 271 is provided on the locking block 270. The bolt 271 is used to connect with the fixing cap 220. The U-shaped clip 240 is provided with two clips 241, and the two clips 241 are respectively located on both sides of the resistance sheet 230. The pull rod 250 is penetrated by the two clips 241, and the pull rod 250 is threadedly connected to the handle 260, and the handle 260 is rotated to make the clip 241 clamp the resistance sheet 230.

[0056] When the handle 260 is turned, the rod 250 can be driven to move toward the side where the handle 260 is located, so that the rod 250 presses the clip 241, the clip 241 is brought closer, and the clip 241 clamps the resistance sheet 230, so that the L-shaped frame 210 and the heat sink 110 are fixed; the handle 260 is turned in the opposite direction to move the rod 250 away from the rod 250, the pressure of the rod 250 on the clip 241 is reduced, and the clips 241 are away from each other, so that the clip 241 is separated from the resistance sheet 230, so that the heat sink 110 can rotate relative to the L-shaped frame 210, and the rotation center is the axis of the bolt 271. Therefore, when the lighting angle of the LED flat panel light 10 needs to be adjusted, the handle 260 is first turned in the opposite direction to separate the clip 241 from the resistance sheet 230. After adjusting the angle, the handle 260 is rotated again to make the clip 241 clamp the resistance sheet 230. The locking force is provided by the friction between the resistance sheet 230 and the clip 241 , and both the clip 241 and the resistance sheet 230 are detachable parts. When the connection is loose, the clip 241 or the resistance sheet 230 can be replaced separately, thereby extending the service life of the bracket 200 .

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made 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 of the present invention shall be subject to the attached claims.

Claims

1. An LED flat panel light, characterized in that: include: Housing, bracket and lighting components; The shell comprises a heat sink, an outer shell, an inner shell and a central shell, the heat sink is provided with a plurality of heat sinks, the inner shell is arranged on the heat sink, the outer shell wraps the inner shell, the inner shell and the heat sink together form a mounting cavity, the central shell is connected to the heat sink after passing through the inner shell, and the inner wall of the central shell and the heat sink together form a light-transmitting chamber; The bracket is connected to the heat sink; The lighting assembly includes a control board located in the installation cavity and an LED light board, a light homogenizer, and a light-transmitting tube located in the light-transmitting chamber. The LED light board is fitted with the heat sink, the LED light board is electrically connected to the control board, and the lamp beads on the LED light board are facing the light-transmitting tube, and the light homogenizer is attached to the inner wall of the light-transmitting tube.

2. The LED flat panel light according to claim 1, characterized in that: A gap is provided between the LED light board and the light-transmitting tube so that the light-transmitting tube is communicated with the light-transmitting chamber.

3. The LED flat panel light according to claim 2, characterized in that: A sealing cover is also provided in the shell, and the sealing cover is arranged on the control board. The sealing cover is adhered to the heat sink by glue, and a wiring hole is provided on one side of the sealing cover close to the LED lamp board.

4. The LED flat panel light according to claim 3, characterized in that: A avoidance groove is provided on one side of the central shell close to the control board, and the avoidance groove is used to connect the light-transmitting chamber and the installation cavity; The avoidance groove is provided with a blast assembly, the blast assembly includes a blocking block and two wind wheels, the blocking block is provided with a blast chamber and a wind duct passing through the blast chamber, and the wind wheel is rotatably arranged in the blast chamber; The wind wheel is provided with a plurality of toothed blades, the toothed blades on the two wind wheels are meshed with each other, the air duct is directed toward the meshing position of the toothed blades, the toothed blades are in contact with the inner wall of the blower chamber, and the toothed blades are used to guide the airflow from the light-transmitting chamber to the installation cavity and blow it toward the sealing cover.

5. The LED flat panel light according to claim 4, characterized in that: The portion of the toothed blade that contacts the inner wall of the blast chamber is in an arc shape.

6. The LED flat panel light according to claim 4, characterized in that: The blocking block is bonded to the avoidance groove by glue.

7. The LED flat panel light according to claim 1, characterized in that: The housing further comprises a heat dissipation fan, and the heat dissipation fan faces the heat sink.

8. The LED flat panel light according to claim 1, characterized in that: Corner guards are arranged on the edges of the shell.

9. The LED flat panel light according to claim 1, characterized in that: The bracket includes an L-shaped frame, a fixing cap, a resistance sheet, a U-shaped clip, a pull rod, a handle and a locking block, the fixing cap is arranged on the heat sink, the resistance sheet is arranged on the fixing cap, and the diameter of the resistance sheet is larger than the diameter of the fixing cap; The locking block is arranged on the L-shaped frame, and a bolt is provided on the locking block, and the bolt is used to connect with the fixing cap. The U-shaped clamp is provided with two clips, and the two clips are respectively located on both sides of the resistance sheet. The pull rod passes through the two clips, and the pull rod is threadedly connected to the handle, and the handle is rotated to allow the clips to clamp the resistance sheet.

10. The LED flat panel light according to claim 1, characterized in that: The lighting assembly also includes a panel, which is arranged on a side of the heat sink away from the inner shell, and is electrically connected to the control board. The panel includes a display screen, operation keys, a knob and a DM connector.

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