A ceiling-mounted lighting fixture

Abstract

The present invention discloses a ceiling-mounted lighting fixture, which relates to the technical field related to lighting fixtures. A sealed airbag is arranged above an LED lighting unit, and a first radiator is used to conduct heat from the LED lighting unit to the sealed airbag, so that the heat-conducting medium is vaporized and then condensed and refluxed when rising to a second radiator, so that the heat is diffused from the second radiator to a large-area heat spreader and then dispersed into the air, so as to realize passive temperature control of the LED lighting unit in the main lighting lampshade. At the same time, when the temperature is too high and the pressure in the sealed airbag is too high, the sealed airbag will expand, so that the second radiator will be out of contact with the metal seat, so that the heat-conducting medium in the sealed airbag will quickly condense, causing the sealed airbag to retract, and the cooperation of the eccentric wheel and the sliding guide rail will drive the first movable pulley and the second movable pulley to rotate back and forth continuously, so that the first airbag and the second airbag are used to pump external cold air into the main lighting lampshade, the first auxiliary lampshade and the second auxiliary lampshade.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting appliances, and particularly to an overhead lighting appliance. Background Art

[0002] An overhead lighting appliance refers to a lighting device installed on the top of a room or ceiling, whose main function is to provide indoor lighting. Overhead lighting appliances usually adopt high-efficiency and energy-saving light-emitting elements such as LEDs. Compared with traditional incandescent lamps or fluorescent lamps, they have lower energy consumption and longer service life. With the progress of technology and the enhancement of environmental awareness, the demand for overhead lighting appliances in terms of energy conservation and environmental protection is becoming more and more vigorous, which directly promotes technological innovation and product upgrading in the industry.

[0003] High-power LED lighting appliances will generate a large amount of heat during operation. Therefore, high-power lighting appliances inevitably need to dissipate heat. Traditional heat dissipation methods include passive heat dissipation and active heat dissipation.

[0004] Passive heat dissipation has low efficiency and is difficult to meet the heat dissipation requirements of high-power lighting appliances. Most active heat dissipation methods use air cooling, which has high efficiency but will generate additional energy consumption and does not meet the requirements of energy conservation and environmental protection. Therefore, we need a more energy-saving and environmentally friendly overhead lighting appliance. Summary of the Invention

[0005] The purpose of the present invention is to provide an overhead lighting appliance to solve the problem that the traditional heat dissipation method of overhead lighting appliances does not meet the environmental protection requirements mentioned in the above background.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An overhead lighting appliance includes a main lighting lampshade. A first auxiliary lampshade and a second auxiliary lampshade are respectively arranged on both sides of the main lighting lampshade. A support hanger is arranged above the main lighting lampshade, the first auxiliary lampshade and the second auxiliary lampshade. The support hanger is fixedly connected to the building through expansion screws. A first fixed pulley and a second fixed pulley are respectively rotatably connected to the left and right sides of the support hanger. The first fixed pulley and the second fixed pulley are symmetrically arranged on the support hanger. The left and right ends above the main lighting lampshade are respectively rotatably connected to a first movable pulley and a second movable pulley. A hanging steel wire rope is fixedly connected between the first auxiliary lampshade and the second auxiliary lampshade. The hanging steel wire rope hoists the main lighting lampshade, the first auxiliary lampshade and the second auxiliary lampshade through the first fixed pulley, the second fixed pulley, the first movable pulley and the second movable pulley;

[0007] The main lighting lamp cover, the first auxiliary lamp cover, and the second auxiliary lamp cover are all provided with LED lighting units. A metal seat is fixedly connected above the LED lighting unit. A sealing airbag is arranged above the main lighting lamp cover. A first radiator and a second radiator are arranged inside the sealing airbag. A heat sink plate is fixedly connected to the upper end of the sealing airbag. Heat dissipation fins are arranged on the heat sink plate. The first radiator is in close contact with the metal seat, and the second radiator is in close contact with the heat sink plate. A heat-conducting medium is filled in the sealing airbag;

[0008] Eccentric wheels are fixedly connected to both sides of the first movable pulley and the second movable pulley. An eccentric guiding rod is fixedly connected to the outside of the eccentric wheel. A sliding guide rail is fixedly connected to the inner side of the heat sink plate. The eccentric guiding rod is slidably connected to the sliding guide rail;

[0009] A first airbag is arranged between the main lighting lamp cover and the first auxiliary lamp cover. Both ends of the first airbag are respectively communicated with the main lighting lamp cover and the first auxiliary lamp cover. A first air intake filter screen is arranged on the left side of the first auxiliary lamp cover. A second airbag is arranged between the main lighting lamp cover and the second auxiliary lamp cover. Both ends of the second airbag are respectively communicated with the main lighting lamp cover and the second auxiliary lamp cover. A second air intake filter screen is arranged on the right side of the second auxiliary lamp cover. An air outlet pipe is arranged above the main lighting lamp cover.

[0010] In one example, a hanging steel wire rope is fixedly connected above the first auxiliary lamp cover. The hanging steel wire rope sequentially passes above the first fixed pulley, below the first movable pulley and the second movable pulley, and above the second fixed pulley, and is finally fixedly connected to the second auxiliary lamp cover. Thus, when the first auxiliary lamp cover 2 rises, the second auxiliary lamp cover 3 will descend, and when the first auxiliary lamp cover 2 descends, the second auxiliary lamp cover 3 will rise.

[0011] In one example, a telescopic sleeve is fixedly connected below the second radiator. A telescopic rod penetrates through the telescopic sleeve. A first spring is arranged inside the telescopic sleeve. The first spring is sleeved outside the telescopic rod. The first spring is located between the spring retaining piece at the top end of the telescopic rod and the constricted opening at the lower end of the telescopic sleeve. A first magnet is fixedly connected above the metal seat. A second magnet is fixedly connected to the bottom of the first radiator. The first magnet and the second magnet face each other with different magnetic poles.

[0012] In one example, the material of the sealing airbag is vulcanized rubber flame-retardant heat-conducting glue. The side wall of the sealing airbag is folded in a sawtooth shape, and the sealing airbag is hermetically connected to the heat sink plate and the metal seat respectively.

[0013] In one example, the heat-conducting medium inside the sealed airbag is selected as anhydrous ethanol, and the boiling point of anhydrous ethanol under standard atmospheric pressure is 78.4 °C. Therefore, when heated at the first radiator, it can quickly evaporate into steam. When the steam rises to the second radiator with a lower temperature, it will condense when it meets the cold and then drip back to the first radiator again. Thus, by utilizing the fluidity of the steam, heat can be quickly transferred from the first radiator and the metal seat to the second radiator and the heat sink plate, and quickly dissipated into the air by the heat dissipation fins 1501 on the heat sink plate. This is the process of passive heat dissipation.

[0014] In one example, a first upper baffle is fixedly connected above the left side of the main lighting lamp cover, and a first lower baffle is fixedly connected below the right side of the first auxiliary lamp cover. The first airbag is located between the first upper baffle and the first lower baffle. The upper end of the first airbag is fixedly connected to the first upper baffle, and the lower end of the first airbag is fixedly connected to the first lower baffle.

[0015] In one example, a first intake pipe is fixedly connected to the lower end of the first airbag. The first intake pipe communicates with the first auxiliary lamp cover, and a first one-way valve is arranged inside the first intake pipe. A first outlet pipe is fixedly connected to the upper end of the first airbag. The first outlet pipe communicates with the main lighting lamp cover, and a second one-way valve is arranged inside the first outlet pipe. A first return spring is arranged inside the first airbag. The upper end of the first return spring contacts the first upper baffle, and the lower end of the first return spring contacts the first lower baffle.

[0016] In one example, a second upper baffle is fixedly connected above the right side of the main lighting lamp cover, and a second lower baffle is fixedly connected below the left side of the second auxiliary lamp cover. The second airbag is located between the second upper baffle and the second lower baffle. The upper end of the second airbag is fixedly connected to the second upper baffle, and the lower end of the second airbag is fixedly connected to the second lower baffle.

[0017] In one example, a second intake pipe is fixedly connected to the lower end of the second airbag. The second intake pipe communicates with the second auxiliary lamp cover, and a third one-way valve is arranged inside the second intake pipe. A second outlet pipe is fixedly connected to the upper end of the second airbag. The second outlet pipe communicates with the main lighting lamp cover, and a fourth one-way valve is arranged inside the second outlet pipe. A second return spring is arranged inside the second airbag. The upper end of the second return spring contacts the second upper baffle, and the lower end of the second return spring contacts the second lower baffle.

[0018] In one example, the outlet pipe is located between the two groups of sealed airbags. The outlet pipe includes a lifting sleeve, and the lifting sleeve communicates with the main lighting lamp cover. A lifting piston penetrates through the lifting sleeve. On both sides of the lifting sleeve close to the sealed airbag, side air outlet grooves are vertically opened. On both sides of the lower end of the lifting piston, limiting blocks are fixedly connected, and the limiting blocks are slidably connected with the side air outlet grooves. A second spring is arranged inside the lifting sleeve, and the second spring is located below the lifting piston.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] A top-mounted lighting fixture proposed by the present invention suspends the main lighting lamp cover, the first auxiliary lamp cover and the second auxiliary lamp cover on a building by using a movable pulley and a fixed pulley respectively. Then, a sealed airbag is arranged above the LED lighting unit, and a heat-conducting medium that is easy to vaporize is contained in the sealed airbag. The first radiator conducts heat from the LED lighting unit into the sealed airbag, causing the heat-conducting medium to vaporize, and then condensing and flowing back when rising to the second radiator, so that the heat diffuses from the second radiator to a large-area heat sink plate and dissipates into the air, to achieve passive temperature control of the LED lighting unit in the main lighting lamp cover. At the same time, when the temperature is too high and the pressure in the sealed airbag is too large, the sealed airbag will expand. At this time, the heat dissipation area of the sealed airbag increases, and the second radiator is pulled upward, thus disengaging from the contact with the metal seat, resulting in hindered heat conduction. As a result, the heat-conducting medium in the sealed airbag will quickly condense, causing the sealed airbag to retract, and driving the first movable pulley and the second movable pulley to rotate continuously through the cooperation of the eccentric wheel and the sliding guide rail, so that the first auxiliary lamp cover and the second auxiliary lamp cover rise and fall continuously, and thus pump the outside cold air into the main lighting lamp cover, the first auxiliary lamp cover and the second auxiliary lamp cover by using the first airbag and the second airbag. Thus, it has the following several beneficial effects:

[0021] 1. In this way, the heat can be quickly conducted from the first radiator to the second radiator and the heat sink plate by the evaporation and flow of the heat-conducting medium, and it is not affected by the thermal conductivity of the medium, but only affected by the flow rate of the medium, and the temperature of the LED lighting unit can be quickly reduced.

[0022] 2. By the expansion of the sealed airbag and pulling up the second radiator, a quick switch between passive heat dissipation and active heat dissipation can be achieved. When the temperature is not high enough to cause the sealed airbag to expand completely, passive heat dissipation is carried out by using the evaporation and condensation of the medium. When the temperature is too high, resulting in the expansion of the sealed airbag, cold air is pumped into the main lighting lamp cover, the first auxiliary lamp cover and the second auxiliary lamp cover by using the compression and expansion of the airbag for active heat dissipation, which can effectively improve the heat dissipation efficiency, and no additional energy is required, which is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the external structure of a top-mounted lighting fixture of the present invention;

[0024] Figure 2 is a front view structural schematic diagram of a top-mounted lighting fixture of the present invention;

[0025] Figure 3 is a cross-sectional structural schematic diagram of the sealed airbag of the present invention;

[0026] Figure 4 is a cross-sectional structural schematic diagram of the first radiator of the present invention;

[0027] Figure 5 Schematic diagram of the eccentric wheel structure of the present invention;

[0028] Figure 6 Schematic diagram of the first airbag structure of the present invention;

[0029] Figure 7 Schematic diagram of the second airbag structure of the present invention;

[0030] Figure 8 Schematic diagram of the air outlet pipe structure of the present invention.

[0031] Reference numerals in the figure: 1, main lighting lamp cover; 101, first upper baffle; 102, second upper baffle; 2, first auxiliary lamp cover; 201, first lower baffle; 3, second auxiliary lamp cover; 301, second lower baffle; 4, support hanger; 5, first fixed pulley; 6, second fixed pulley; 7, first movable pulley; 8, second movable pulley; 9, hanging steel wire rope; 10, LED lighting unit; 11, metal seat; 1101, first magnet; 12, sealing airbag; 13, first radiator; 1301, second magnet; 14, second radiator; 15, heat spreader; 1501, heat dissipation fins; 16, telescopic sleeve; 17, telescopic rod; 18, first spring; 19, eccentric wheel; 1901, eccentric guide rod; 20, sliding guide rail; 21, first airbag; 2101, first air inlet pipe; 2102, first one-way valve; 2103, first air outlet pipe; 2104, second one-way valve; 2105, first return spring; 22, first air inlet filter; 23, second airbag; 2301, second air inlet pipe; 2302, third one-way valve; 2303, second air outlet pipe; 2304, fourth one-way valve; 2305, second return spring; 24, second air inlet filter; 25, air outlet pipe; 2501, lifting sleeve; 2502, lifting piston; 2503, side air outlet groove; 2504, limit block; 2505, second spring. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Such as Figure 1 - Figure 8As shown in the figure, an overhead lighting fixture includes a main lighting shade 1. On both sides of the main lighting shade 1, a first auxiliary shade 2 and a second auxiliary shade 3 are respectively provided. Above the main lighting shade 1, the first auxiliary shade 2, and the second auxiliary shade 3, there is a support hanger 4. The support hanger 4 is fixedly connected to the building through expansion screws. On the left and right sides of the support hanger 4, a first fixed pulley 5 and a second fixed pulley 6 are respectively rotatably connected. The first fixed pulley 5 and the second fixed pulley 6 are symmetrically arranged on the support hanger 4. At the upper left and right ends above the main lighting shade 1, a first movable pulley 7 and a second movable pulley 8 are respectively rotatably connected. A hanging steel wire rope 9 is fixedly connected between the first auxiliary shade 2 and the second auxiliary shade 3. Above the first auxiliary shade 2, a hanging steel wire rope 9 is fixedly connected. The hanging steel wire rope 9 passes above the first fixed pulley 5, below the first movable pulley 7 and the second movable pulley 8, and above the second fixed pulley 6 in sequence, and is finally fixedly connected to the second auxiliary shade 3. The hanging steel wire rope 9 lifts the main lighting shade 1, the first auxiliary shade 2, and the second auxiliary shade 3 through the first fixed pulley 5, the second fixed pulley 6, the first movable pulley 7, and the second movable pulley 8. Thus, when the first auxiliary shade 2 rises, the second auxiliary shade 3 will descend, and when the first auxiliary shade 2 descends, the second auxiliary shade 3 will rise.

[0034] LED lighting units 10 are provided inside the main lighting shade 1, the first auxiliary shade 2, and the second auxiliary shade 3. Above the LED lighting unit 10, a metal seat 11 is fixedly connected. Above the main lighting shade 1, a sealed airbag 12 is provided. The material of the sealed airbag 12 is vulcanized rubber flame-retardant and heat-conducting glue. The side wall of the sealed airbag 12 is folded in a serrated shape, and the sealed airbag 12 is hermetically connected to the heat sink plate 15 and the metal seat 11 respectively. Inside the sealed airbag 12, a first radiator 13 and a second radiator 14 are provided. The upper end of the sealed airbag 12 is fixedly connected to the heat sink plate 15. The first radiator 13 is in close contact with the metal seat 11, and the second radiator 14 is in close contact with the heat sink plate 15. A heat-conducting medium is filled in the sealed airbag 12. The heat-conducting medium in the sealed airbag 12 is selected as anhydrous ethanol. The boiling point of anhydrous ethanol under standard atmospheric pressure is 78.4 °C. Thus, when heated at the first radiator 13, it can quickly evaporate into steam. When the steam rises to the second radiator 14 with a lower temperature, it will condense when cooled and then drip back to the first radiator 13 again. Thus, by using the fluidity of the steam, the heat can be quickly transferred from the first radiator 13 and the metal seat 11 to the second radiator 14 and the heat sink plate 15, and quickly dissipated into the air through the heat dissipation fins 1501 on the heat sink plate 15. This is the process of passive heat dissipation.

[0035] A telescopic sleeve 16 is fixedly connected below the second radiator 14. A telescopic rod 17 passes through the telescopic sleeve 16. A first spring 18 is arranged in the telescopic sleeve 16. The first spring 18 is sleeved outside the telescopic rod 17. The first spring 18 is located between the spring retainer at the top of the telescopic rod 17 and the reduced opening at the lower end of the telescopic sleeve 16. A first magnet 1101 is fixedly connected above the metal seat 11. A second magnet 1301 is fixedly connected to the bottom of the first radiator 13. The first magnet 1101 and the second magnet 1301 face each other with different magnetic poles. Thus, when the temperature of the LED lighting unit 10 is too high, the evaporation amount of the heat-conducting medium in the sealed airbag 12 is greater than the condensation amount, which will cause the pressure in the sealed airbag 12 to increase. The sealed airbag 12 will expand. When the sealed airbag 12 expands, it will cause the telescopic rod 17 to be pulled upward, so that the first magnet 1101 and the second magnet 1301 are separated from adsorption, so that the first radiator 13 is pulled up and separated from the contact with the metal seat 11, so that the heat conduction of the LED lighting unit 10 into the sealed airbag 12 is blocked. At the same time, the folds on the side wall of the sealed airbag 12 will unfold, increasing the heat exchange area with the air and improving the cooling effect. Thus, under the dual action, the heat-conducting medium is quickly cooled and condensed, causing the sealed airbag 12 to retract again. After retraction, the first magnet 1101 and the second magnet 1301 will contact and adsorb again, which will cause the first radiator 13 to contact the metal seat 11 again, accelerating heat conduction. At the same time, the folded side wall of the sealed airbag 12 will also reduce the heat dissipation speed, causing the sealed airbag 12 to expand again.

[0036] Eccentric wheels 19 are fixedly connected to both sides of the first movable pulley 7 and the second movable pulley 8. An eccentric guide rod 1901 is fixedly connected to the outside of the eccentric wheel 19. A sliding guide rail 20 is fixedly connected to the inside of the heat sink plate 15. The eccentric guide rod 1901 is slidably connected to the sliding guide rail 20. Thus, during the continuous expansion and contraction of the sealed airbag 12, the heat sink plate 15 will also continuously rise and then fall. Thus, through the cooperation of the sliding guide rail 20 and the eccentric guide rod 1901, the eccentric wheel 19 will be driven to rotate continuously, so that the first movable pulley 7 and the second movable pulley 8 will also rotate continuously, so as to drive the first auxiliary lamp cover 2 and the second auxiliary lamp cover 3 to rise and fall in turn by means of the hanging steel wire rope 9.

[0037] In addition, a first airbag 21 is provided between the main lighting lamp cover 1 and the first auxiliary lamp cover 2. Both ends of the first airbag 21 are respectively communicated with the main lighting lamp cover 1 and the first auxiliary lamp cover 2. A first air intake filter screen 22 is provided on the left side of the first auxiliary lamp cover 2. A second airbag 23 is provided between the main lighting lamp cover 1 and the second auxiliary lamp cover 3. Both ends of the second airbag 23 are respectively communicated with the main lighting lamp cover 1 and the second auxiliary lamp cover 3. A second air intake filter screen 24 is provided on the right side of the second auxiliary lamp cover 3. An air outlet pipe 25 is provided above the main lighting lamp cover 1. A first upper baffle 101 is fixedly connected above the left side of the main lighting lamp cover 1. A first lower baffle 201 is fixedly connected below the right side of the first auxiliary lamp cover 2. The first airbag 21 is located between the first upper baffle 101 and the first lower baffle 201. The upper end of the first airbag 21 is fixedly connected to the first upper baffle 101, and the lower end of the first airbag 21 is fixedly connected to the first lower baffle 201. A first air inlet pipe 2101 is fixedly connected to the lower end of the first airbag 21. The first air inlet pipe 2101 is communicated with the first auxiliary lamp cover 2. A first one-way valve 2102 is provided in the first air inlet pipe 2101. A first air outlet pipe 2103 is fixedly connected to the upper end of the first airbag 21. The first air outlet pipe 2103 is communicated with the main lighting lamp cover 1. A second one-way valve 2104 is provided in the first air outlet pipe 2103. A first return spring 2105 is provided in the first airbag 21. The upper end of the first return spring 2105 contacts the first upper baffle 101, and the lower end of the first return spring 2105 contacts the first lower baffle 201. A second upper baffle 102 is fixedly connected above the right side of the main lighting lamp cover 1. A second lower baffle 301 is fixedly connected below the left side of the second auxiliary lamp cover 3. The second airbag 23 is located between the second upper baffle 102 and the second lower baffle 301. The upper end of the second airbag 23 is fixedly connected to the second upper baffle 102, and the lower end of the second airbag 23 is fixedly connected to the second lower baffle 301. A second air inlet pipe 2301 is fixedly connected to the lower end of the second airbag 23. The second air inlet pipe 2301 is communicated with the second auxiliary lamp cover 3. A third one-way valve 2302 is provided in the second air inlet pipe 2301. A second air outlet pipe 2303 is fixedly connected to the upper end of the second airbag 23. The second air outlet pipe 2303 is communicated with the main lighting lamp cover 1. A fourth one-way valve 2304 is provided in the second air outlet pipe 2303. A second return spring 2305 is provided in the second airbag 23. The upper end of the second return spring 2305 contacts the second upper baffle 102, and the lower end of the second return spring 2305 contacts the second lower baffle 301. When the first auxiliary lamp cover 2 descends, the distance between the first upper baffle 101 and the first lower baffle 201 will increase, thereby stretching the first airbag 21, making the volume inside the first airbag 21 increase. At the same time, the first one-way valve 2102 opens and the second one-way valve 2104 closes. In this way, the first airbag 21 will draw air from the first auxiliary lamp cover 2, and the outside cold air enters the first auxiliary lamp cover 2 through the first air intake filter screen 22 on the left side of the first auxiliary lamp cover 2 to dissipate heat from the LED lighting unit 10 inside the first auxiliary lamp cover 2, and then enters the first airbag 21. When the first auxiliary lamp cover 2 rises,The distance between the first upper baffle 101 and the first lower baffle 201 will decrease, thereby compressing the first airbag 21. At this time, the first one-way valve 2102 closes and the second one-way valve 2104 opens, so as to pump the air in the first airbag 21 into the main lighting lamp cover 1. Similarly, the second airbag 23 will also continuously pump air from the outside into the second auxiliary lamp cover 3 and the main lighting lamp cover 1, so as to conduct active heat dissipation. The air in the main lighting lamp cover 1 flows out through the air outlet pipe 25. The air outlet pipe 25 is located between two groups of sealed airbags 12. The air outlet pipe 25 includes a lifting sleeve 2501. The lifting sleeve 2501 is communicated with the main lighting lamp cover 1. A lifting piston 2502 penetrates through the lifting sleeve 2501. On both sides of the lifting sleeve 2501 close to the sealed airbag 12, side air outlet grooves 2503 are vertically opened. On both sides of the lower end of the lifting piston 2502, limiting blocks 2504 are fixedly connected. The limiting blocks 2504 are slidably connected with the side air outlet grooves 2503. A second spring 2505 is arranged in the lifting sleeve 2501. The second spring 2505 is located below the lifting piston 2502. Thus, the flowing air will blow to the adjacent sealed airbag 12 from the side air outlet grooves 2503 on both sides, increasing the heat dissipation effect of the sealed airbag 12.,

[0038] In another embodiment, the heat-conducting medium is acetone. The thermal resistance of acetone is lower than that of ethanol, and the boiling point of acetone is 56.12 °C, which is also lower than that of ethanol. Therefore, at the same temperature, acetone is more likely to evaporate and has advantages in certain heat exchanges. However, the chemical properties of acetone are more active, prone to chemical reactions, and the safety is relatively low.,

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.,

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.,

Claims

1. An overhead lighting fixture, characterized in that: It includes a main lighting lamp cover, with a first auxiliary lamp cover and a second auxiliary lamp cover respectively arranged on both sides of the main lighting lamp cover. A support hanger is arranged above the main lighting lamp cover, the first auxiliary lamp cover and the second auxiliary lamp cover. The support hanger is fixedly connected to the building through expansion screws, and the main lighting lamp cover, the first auxiliary lamp cover and the second auxiliary lamp cover are hung on the support hanger; LED lighting units are arranged in the main lighting lamp cover, the first auxiliary lamp cover and the second auxiliary lamp cover. A metal seat is fixedly connected above the LED lighting unit. A sealing airbag is arranged above the main lighting lamp cover. A first radiator and a second radiator are arranged in the sealing airbag. A heat spreader is fixedly connected to the upper end of the sealing airbag. Heat dissipation fins are arranged on the heat spreader. The first radiator is closely attached to the metal seat, the second radiator is closely attached to the heat spreader, and a heat conduction medium is filled in the sealing airbag; A first airbag is arranged between the main lighting lamp cover and the first auxiliary lamp cover. Both ends of the first airbag are respectively communicated with the main lighting lamp cover and the first auxiliary lamp cover. A first air intake filter screen is arranged on the left side of the first auxiliary lamp cover. A second airbag is arranged between the main lighting lamp cover and the second auxiliary lamp cover. Both ends of the second airbag are respectively communicated with the main lighting lamp cover and the second auxiliary lamp cover. A second air intake filter screen is arranged on the right side of the second auxiliary lamp cover. An air outlet pipe is arranged above the main lighting lamp cover. A first fixed pulley and a second fixed pulley are respectively rotatably connected to the left and right sides of the support hanger. A first movable pulley and a second movable pulley are respectively rotatably connected to the left and right ends above the main lighting lamp cover. A hanging steel wire rope is fixedly connected between the first auxiliary lamp cover and the second auxiliary lamp cover. The hanging steel wire rope hoists the main lighting lamp cover, the first auxiliary lamp cover and the second auxiliary lamp cover through the first fixed pulley, the second fixed pulley, the first movable pulley and the second movable pulley. Eccentric wheels are fixedly connected to both sides of the first movable pulley and the second movable pulley. Eccentric guide rods are fixedly connected to the outside of the eccentric wheels. A sliding guide rail is fixedly connected to the inner side of the heat spreader. The eccentric guide rods are slidably connected with the sliding guide rail.

2. The overhead lighting fixture according to claim 1, wherein: The first fixed pulley and the second fixed pulley are symmetrically arranged on the support hanger. One end of the hanging steel wire rope is fixedly connected above the first auxiliary lamp cover. The hanging steel wire rope sequentially passes above the first fixed pulley, below the first movable pulley and the second movable pulley, and above the second fixed pulley, and is finally fixedly connected to the second auxiliary lamp cover.

3. The overhead lighting fixture according to claim 1, wherein: A telescopic sleeve is fixedly connected below the second radiator. A telescopic rod penetrates through the telescopic sleeve. A first spring is arranged in the telescopic sleeve. The first spring is sleeved outside the telescopic rod. The first spring is located between the spring retaining piece at the top end of the telescopic rod and the constricted opening at the lower end of the telescopic sleeve. A first magnet is fixedly connected above the metal seat. A second magnet is fixedly connected to the bottom of the first radiator. The first magnet and the second magnet face each other with different magnetic poles.

4. The overhead lighting fixture according to claim 1, wherein: The material of the sealing airbag is vulcanized rubber flame-retardant heat-conducting glue. The side wall of the sealing airbag is folded in a serrated shape, and the sealing airbag is hermetically connected to the heat spreader and the metal seat respectively.

5. The overhead lighting fixture according to claim 1, characterized in that: The heat conduction medium in the sealing airbag is selected as anhydrous ethanol.

6. The overhead lighting fixture according to claim 1, wherein: A first upper baffle is fixedly connected above the left side of the main lighting lamp cover. A first lower baffle is fixedly connected below the right side of the first auxiliary lamp cover. The first airbag is located between the first upper baffle and the first lower baffle. The upper end of the first airbag is fixedly connected to the first upper baffle, and the lower end of the first airbag is fixedly connected to the first lower baffle.

7. The top-mounted lighting fixture according to claim 6, characterized in that: The lower end of the first airbag is fixedly connected to a first inlet pipe, and the first inlet pipe communicates with the first auxiliary lamp cover. A first one-way valve is arranged in the first inlet pipe. The upper end of the first airbag is fixedly connected to a first outlet pipe, and the first outlet pipe communicates with the main lighting lamp cover. A second one-way valve is arranged in the first outlet pipe. A first return spring is arranged in the first airbag. The upper end of the first return spring contacts the first upper baffle, and the lower end of the first return spring contacts the first lower baffle.

8. The overhead lighting fixture according to claim 1, wherein: A second upper baffle is fixedly connected above the right side of the main lighting lamp cover. A second lower baffle is fixedly connected below the left side of the second auxiliary lamp cover. The second airbag is located between the second upper baffle and the second lower baffle. The upper end of the second airbag is fixedly connected to the second upper baffle, and the lower end of the second airbag is fixedly connected to the second lower baffle.

9. The overhead lighting fixture according to claim 8, wherein: The lower end of the second airbag is fixedly connected to a second inlet pipe, and the second inlet pipe communicates with the second auxiliary lamp cover. A third one-way valve is arranged in the second inlet pipe. The upper end of the second airbag is fixedly connected to a second outlet pipe, and the second outlet pipe communicates with the main lighting lamp cover. A fourth one-way valve is arranged in the second outlet pipe. A second return spring is arranged in the second airbag. The upper end of the second return spring contacts the second upper baffle, and the lower end of the second return spring contacts the second lower baffle.

10. The overhead lighting fixture according to claim 1, characterized in that: The outlet pipe is located between the two sealed airbags. The outlet pipe includes a lifting sleeve, and the lifting sleeve communicates with the main lighting lamp cover. A lifting piston penetrates through the lifting sleeve. Side air outlet grooves are vertically formed on both sides of the lifting sleeve close to the sealed airbag. Limit blocks are fixedly connected to both sides of the lower end of the lifting piston, and the limit blocks are slidably connected to the side air outlet grooves. A second spring is arranged in the lifting sleeve, and the second spring is located below the lifting piston.

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