High-stability outdoor ceiling lamp driving power supply

Abstract

The application discloses a high-stability outdoor ceiling lamp driving power supply, which comprises a shell and a cover slidingly connected with the shell; a power board, a pressure sensor electrically connected with the power board and a power element arranged on the power board are arranged in the shell; a suction mechanism and a transmission mechanism in transmission connection with the suction mechanism are further arranged in the shell, and the shell is provided with an air inlet; the cover is provided with a heat dissipation induction assembly capable of driving the cover to slide and a variable-speed driving mechanism in transmission connection with the transmission mechanism, and the cover is provided with an air outlet; initially, the cover is pressed against the pressure sensor, and the air inlet and the air outlet are in a closed state; the application generates a heat dissipation airflow in the shell to perform internal heat dissipation; meanwhile, in the heat dissipation process, the transmission ratio between the first transmission tooth and the second transmission tooth can be automatically dynamically adjusted according to the heating condition of the power element; compared with the temperature detection mode of the existing temperature sensor, the reliability and the adjustment precision of heat dissipation adjustment are improved, and the power supply stability is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to lighting device technology, in particular to a high-stability outdoor ceiling lamp driving power supply. BACKGROUND

[0002] The lighting range of outdoor lamps is wider than that of indoor lamps, and the power is also larger. The power elements inside the driving power supply of high-power lamps often generate more heat, and active cooling is needed to meet the cooling needs of the power elements.

[0003] The existing active cooling technology detects the temperature of the power element through a temperature sensor, and controls the speed of the cooling motor according to the detection result, so as to realize cooling of the power element according to the actual working condition of the driving power supply.

[0004] However, due to the temperature drift of the temperature sensor, the detection result often cannot accurately reflect the actual temperature of the power element, resulting in abnormal operation of the power element under high temperature conditions at some time, and low power supply stability of the lamp. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned shortcomings, and to provide a high-stability outdoor ceiling lamp driving power supply.

[0006] In order to achieve the above-mentioned purpose, the specific scheme of the present application is as follows:

[0007] A high-stability outdoor ceiling lamp driving power supply, comprising a shell and a cover slidingly connected to the shell;

[0008] The shell is provided with a power board, a pressure sensor electrically connected to the power board, and a power element arranged on the power board. The shell is also provided with a suction mechanism and a transmission mechanism in transmission connection with the suction mechanism. The shell is provided with an air inlet;

[0009] The cover is provided with a heat dissipation induction assembly capable of driving the cover to slide, and a variable speed driving mechanism in transmission connection with the transmission mechanism. The cover is provided with an air outlet;

[0010] At the beginning, the cover is pressed against the pressure sensor, and the air inlet and the air outlet are in a closed state.

[0011] Optionally, the heat dissipation induction assembly comprises a heat dissipation body and a piston rod. The bottom of the heat dissipation body is in abutment with the power element. The heat dissipation body is provided with a cavity. One end of the piston rod is movably inserted into the cavity and forms an expansion cavity with the cavity. The expansion cavity is filled with an expansion liquid which can be expanded by heat volatilization. The other end of the piston rod is fixedly connected with the cover.

[0012] Optionally, the outer peripheral wall of the heat dissipation body is provided with spiral heat dissipation fins.

[0013] Optionally, the bottom of the heat dissipation body is provided with a containing groove for containing the power element.

[0014] Optionally, the transmission mechanism comprises a first conical transmission gear, and the variable speed driving mechanism comprises a second conical transmission gear in elastic sliding connection, and the first transmission gear is in mesh with the second transmission gear.

[0015] Optionally, the variable speed driving mechanism comprises a variable speed support, a driving motor arranged on the variable speed support, a variable speed sliding block slidingly arranged on the variable speed support, a spring arranged between the variable speed sliding block and the variable speed support, a first bevel gear rotatably arranged on the variable speed sliding block, and a second bevel gear sleeved on the second transmission gear, the first bevel gear is further sleeved with the output end profile of the driving motor and can slide relative to the driving motor, the second transmission gear is rotatably arranged on the variable speed sliding block, the axis of the first bevel gear is perpendicular to the axis of the second transmission gear, and the second bevel gear is in mesh with the first bevel gear.

[0016] Optionally, the transmission mechanism comprises a transmission support fixedly connected to the inner side wall of the shell, and a friction wheel rotatably arranged on the transmission support, the first transmission gear is fixedly sleeved with the friction wheel, the friction wheel is connected with the suction mechanism, and the material pressing sensor is arranged on the transmission support.

[0017] Optionally, the suction mechanism comprises a suction support fixedly arranged in the shell, and a suction rotor rotatably arranged on the suction support, and the friction wheel is connected with the outer peripheral wall of the suction rotor.

[0018] Optionally, a water guide groove is arranged in the shell, a plurality of drainage holes are arranged on the groove bottom of the water guide groove, the suction mechanism further comprises a rotating disc rotatably arranged on the suction support, the suction rotor is fixedly connected with the rotating disc, and a water scraping mechanism is arranged on the rotating disc.

[0019] Optionally, the water scraping mechanism comprises a water scraping guide seat, a gear rotatably connected to the water scraping guide seat, a first rack and a second rack slidingly connected side by side to the water scraping guide seat, a torsional spring further connected between the gear and the water scraping guide seat, the first rack and the second rack are in mesh with the gear, one end of the first rack is connected with a flexible water scraping piece extending into the water guide groove, and one end of the second rack is connected with a first counterweight.

[0020] Initially, under the action of the torsional spring, the first rack makes the flexible water scraping piece abut against the outer groove wall of the water guide groove.

[0021] The beneficial effects of the present application are: the present application sets the expansion cavity filled with expansion liquid in the heat dissipation body, so that the piston rod pushes the cover to move by using the expansion liquid to expand by heat volatilization, so that the pressure sensor generates a sensing signal, the power panel controls the variable speed driving mechanism to work according to the sensing signal, the variable speed driving mechanism drives the suction mechanism to work through the transmission mechanism, so that the heat dissipation airflow is generated in the shell to perform internal heat dissipation; meanwhile, the transmission ratio between the first transmission tooth and the second transmission tooth can be automatically dynamically adjusted according to the heating condition of the power element during the heat dissipation process, compared with the temperature detection mode of the existing temperature sensor, the reliability and the adjustment accuracy of the heat dissipation adjustment are improved, and the power supply stability is higher. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a cross-sectional view of the present application when the cover is not extended;

[0023] Figure 2 is an exploded view of the present application;

[0024] Figure 3 is a cross-sectional view of the present application when the cover is extended;

[0025] Figure 4 is a partial structure diagram of the present application;

[0026] Figure 5 is another partial structure diagram of the present application;

[0027] Figure 6 is a cross-sectional view of the variable speed driving mechanism of the present application;

[0028] Figure 7 is a structure diagram of the wiper mechanism of the present application;

[0029] The reference signs are explained: 1, shell; 11, air inlet; 12, water guide groove; 13, drain hole; 2, cover; 21, air outlet; 3, power panel; 4, pressure sensor; 5, power element; 61, suction support; 62, suction rotor; 63, rotating disc; 71, first transmission tooth; 72, transmission support; 73, friction wheel; 81, heat dissipation body; 82, piston rod; 83, expansion cavity; 84, heat dissipation fin; 85, containing groove; 9, variable speed driving mechanism; 91, variable speed support; 92, driving motor; 93, variable speed sliding block; 94, spring; 95, first bevel gear; 96, second bevel gear; 97, second transmission tooth; 10, wiper mechanism; 101, wiper guide seat; 102, gear; 103, first rack; 104, second rack; 105, torsional spring; 106, flexible wiper blade; 107, first counterweight. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the invention to this.

[0031] like Figures 1 to 7 As shown in the figure, the high-stability outdoor pendant light driver power supply described in this embodiment includes a housing 1 and a cover 2 that is slidably inserted into the housing 1. Specifically, the inner sidewall of the housing 1 is provided with vertical protrusions, and the outer sidewall of the cover 2 is provided with vertical grooves, thereby realizing the sliding insertion between the housing 1 and the cover 2 and preventing the cover 2 from rotating relative to the housing 1. During installation, the vertical protrusions slide into the vertical grooves. The number of vertical protrusions and vertical grooves is provided in multiples, and the specific number can be freely set according to actual design requirements.

[0032] The housing 1 contains a power board 3, a pressure sensor 4 electrically connected to the power board 3, and a power element 5 mounted on the power board 3. The housing 1 also contains a suction mechanism and a transmission mechanism connected to the suction mechanism. The housing 1 has an air intake 11. Specifically, the housing 1 has a mounting groove, the power board 3 is fixed in the mounting groove, the power element 5 is electrically connected to the power board 3, the pressure transmitter is used to detect the downward pressure of the cover 2, the suction mechanism is installed at the opening of the mounting groove to dissipate heat from the power element 5, and the air intake 11 is located within the housing. On the side wall of body 1, the number of air inlets 11 can be set to multiple, and the specific number can be freely set according to actual design requirements; further, the air inlet 11 is composed of air inlets and microporous breathable membranes. Multiple air inlets are provided on the side wall of body 1, and each air inlet is provided with a microporous breathable membrane to achieve waterproof and breathable effect, and also to prevent mosquitoes from entering the body 1. The transmission mechanism is set to transmit power to the suction mechanism, so that the suction mechanism draws outside air into the body 1 through the air inlet 11 to dissipate heat from the power component 5;

[0033] The cover 2 is equipped with a heat dissipation sensing component that can drive the cover 2 to slide and a speed change drive mechanism 9 that is connected to the transmission mechanism. The cover 2 is equipped with an exhaust port 21. Specifically, there are multiple exhaust ports 21 so as to dissipate the heat inside the housing 1 to the outside in a timely manner.

[0034] At the beginning, the cover 2 is pressed against the pressure sensor 4, the air inlets 11 and the air outlets 21 are in a closed state, each air inlet 11 is closed by the side wall of the cover 2, and each air outlet 21 is closed by the side wall of the shell 1. Specifically, the variable speed driving mechanism 9 is electrically connected with the power board 3, the heat dissipation sensing assembly is arranged corresponding to the position of the power element 5, so as to timely conduct the heat generated by the power element 5 away, the heat dissipation sensing assembly is used to drive the cover 2 to slide relative to the shell 1, so that the pressure sensor 4 generates an induction signal, the power board 3 receives the induction signal of the pressure sensor 4, the power board 3 controls the variable speed driving mechanism 9 to work, the variable speed driving mechanism 9 drives the suction mechanism to work through the transmission of the transmission mechanism, so that the external air is sucked into the shell 1, and the air in the shell 1 is discharged from the air outlet 21 after absorbing heat, so as to realize the heat dissipation of the power element 5.

[0035] In the embodiment, as shown in Figures 1 to 3 、 Figure 5 The heat dissipation sensing assembly includes a heat dissipation body 81 and a piston rod 82, the bottom of the heat dissipation body 81 is attached to the power element 5, the heat dissipation body 81 is provided with a cavity, one end of the piston rod 82 is movably inserted into the cavity and forms an expansion cavity 83 between the cavity, the expansion cavity 83 is filled with an expansion liquid which can be expanded by volatilization under heat, and the other end of the piston rod 82 is fixedly connected with the cover 2. In the embodiment, the heat dissipation body 81 and the power element 5 are arranged, so as to timely conduct the heat generated by the power element 5 to the expansion liquid in the expansion cavity 83, the expansion liquid absorbs heat and is heated, the expansion liquid is expanded by volatilization, the pressure in the expansion cavity 83 is increased, the piston rod 82 is pushed out, the piston rod 82 pushes the cover 2 to slide relative to the shell 1, so that the shell 1 is communicated with the outside through the air inlet 11, and the cover 2 is communicated with the outside through the air outlet 21, so as to trigger the power board 3 to control the variable speed driving mechanism 9 to work, so that the suction mechanism sucks the external air into the shell 1, the external air absorbs the heat dissipated by the heat dissipation body 81, and then is discharged from the air outlet 21, so as to form a heat dissipation airflow, so as to realize the cooling of the heat dissipation body 81, that is, the cooling of the power element 5. In the embodiment, the expansion liquid is water, the water is heated after absorbing the heat generated by the power element 5, evaporates to produce water vapor, and is volatilized into the expansion cavity 83, so that the pressure in the expansion cavity 83 is increased, so as to push the piston rod 82 to extend out, the water is used as the expansion liquid, the heat absorption effect is good, and the heat dissipation of the power element 5 is more favorable. Of course, the expansion liquid can also be other liquids which can be volatilized under heat to increase the pressure of the expansion cavity 83, such as alcohol.

[0036] In the embodiment, as shown in Figures 1 to 4As shown in the figure, the transmission mechanism includes a tapered first transmission gear 71, the variable speed drive mechanism 9 includes a tapered second transmission gear 97 connected by elastic sliding, the first transmission gear 71 is engaged with the second transmission gear 97. The first transmission gear 71 and the second transmission gear 97 are provided in this embodiment, so as to change the transmission ratio between the variable speed drive mechanism 9 and the suction mechanism, and improve the size of the suction mechanism to form the heat dissipation airflow.

[0037] In this embodiment, as shown in the figure, Figures 1 to 3 、 Figure 6 The variable speed drive mechanism 9 includes a variable speed support 91, a drive motor 92 arranged on the variable speed support 91, a variable speed sliding block 93 slidingly arranged on the variable speed support 91, a spring 94 arranged between the variable speed sliding block 93 and the variable speed support 91, a first bevel gear 95 rotatably arranged on the variable speed sliding block 93, and a second bevel gear 96 sleeved on the second transmission gear 97. The first bevel gear 95 is also sleeved with the output end profile of the drive motor 92 and can slide relative to the drive motor 92. The second transmission gear 97 is rotatably arranged on the variable speed sliding block 93. The axis of the first bevel gear 95 is perpendicular to the axis of the second transmission gear 97. The second bevel gear 96 is engaged with the first bevel gear 95. In this embodiment, the drive motor 92 drives the first bevel gear 95 to rotate. The first bevel gear 95 drives the second transmission gear 97 to rotate through the transmission of the second bevel gear 96. The second transmission gear 97 drives the suction mechanism to work through the transmission of the first transmission gear 71. When the cover 2 slides, the variable speed drive mechanism 9 moves with it. The spring 94 exerts a pushing force on the variable speed sliding block 93, so that the variable speed sliding block 93 slides. The variable speed sliding block 93 drives the second transmission gear 97 to move, so that the second transmission gear 97 can always be engaged with the first transmission gear 71 during the movement of the cover 2.

[0038] In this embodiment, as shown in the figure, Figures 1 to 4 The transmission mechanism includes a transmission support 72 fixedly connected to the inner side wall of the shell 1, and a friction wheel 73 rotatably arranged on the transmission support 72. The first transmission gear 71 is fixedly sleeved with the friction wheel 73. The friction wheel 73 is connected with the suction mechanism. The pressure sensor is arranged on the transmission support 72. In this embodiment, the transmission support 72 is provided for the installation of the pressure sensor 4, the first transmission gear 71 and the friction wheel 73. When the first transmission gear 71 rotates, it drives the friction wheel 73 to rotate, which drives the suction mechanism to work, thereby forming a heat dissipation airflow to cool the heat dissipation body 81 and the power element 5.

[0039] In this embodiment, as shown in the figure, Figures 1 to 4As shown, the suction mechanism comprises a suction support 61 fixed in the shell 1, a suction rotor 62 rotatably arranged on the suction support 61, and the friction wheel 73 connected with the outer circumferential wall of the suction rotor 62. In this embodiment, the suction rotor 62 is rotated under the drive of the friction wheel 73, the ambient air outside the shell 1 is sucked into the shell 1 through the air inlet 11, and a heat dissipation airflow is formed around the power element 5 to dissipate heat.

[0040] In actual use, the power element 5 is heated and the heat is transferred to the expansion liquid in the expansion cavity 83. After the expansion liquid is heated, it is expanded and evaporated, so that the pressure in the expansion cavity 83 is increased, the piston rod 82 is pushed out, the cover 2 is pushed out, and the air inlet 11 and the air outlet 21 are in an open state. At this time, the downward pressure of the cover 2 on the pressure sensor 4 is removed, the pressure sensor 4 generates a sensing signal, the power board 3 receives the sensing signal, and according to the sensing signal, the driving motor 92 drives the first bevel gear 95 to rotate, the first bevel gear 95 drives the second bevel gear 96 to rotate, the second bevel gear 96 drives the second transmission gear 97 to rotate, the second transmission gear 97 drives the first transmission gear 71 to rotate, the first transmission gear 71 drives the friction wheel 73 to rotate, and the friction wheel 73 drives the suction rotor 62 to rotate. The ambient air outside the shell 1 is sucked into the shell 1, the heat on the heat dissipation body 81 is taken away, the heat dissipation airflow after cooling the heat dissipation body 81 is discharged from the air outlet 21, and the heat dissipation effect is achieved.

[0041] Since the effective volume of the expansion cavity 83 is proportional to the heat generated by the power element 5, and when the cover 2 is in the lowest position, the transmission ratio of the first transmission gear 71 and the second transmission gear 97 is the largest, so that the rotating speed of the suction rotor 62 is the smallest. At this time, the heat dissipation airflow generated by the suction rotor 62 is the smallest. If the heat dissipation rate at this time is less than the heat generation rate of the power element 5, the volume of the expansion cavity 83 will further increase, the piston rod 82 will further push the cover 2 out, the transmission arm between the first transmission gear 71 and the second transmission gear 97 will decrease, the rotating speed of the suction rotor 62 will increase, and the heat dissipation airflow will increase, until the heat dissipation rate of the heat dissipation airflow and the heat generation rate of the power element 5 are balanced. At this time, the effective volume of the expansion cavity 83 reaches balance, and the suction rotor 62 remains at a stable rotating speed.

[0042] After the power element 5 is cooled or the power element 5 stops working, the temperature of the expansion liquid gradually decreases, so that the pressure in the expansion cavity 83 gradually decreases. At this time, under the action of atmospheric pressure, the cover 2 pushes the piston rod 82 to retract, the transmission ratio of the first transmission gear 71 and the second transmission gear 97 gradually increases, the rotating speed of the suction rotor 62 gradually decreases, and the heat dissipation airflow gradually decreases, until the cover 2 again presses against the pressure sensor 4, the pressure sensor 4 again generates a sensing signal, and the power board 3 controls the driving motor 92 to stop working according to the received sensing signal, that is, the suction rotor 62 stops generating the heat dissipation airflow.

[0043] The embodiment sets the expansion cavity 83 filled with expansion liquid in the heat dissipation body 81, so that the piston rod 82 pushes the cover 2 to move by using the expansion liquid to expand by heat volatilization, so that the pressure sensor 4 generates a sensing signal, the power panel 3 controls the variable speed driving mechanism 9 to work according to the sensing signal, the variable speed driving mechanism 9 drives the suction mechanism to work through the transmission mechanism, so that the heat dissipation airflow is generated in the shell 1 to perform internal heat dissipation; meanwhile, the transmission ratio between the first transmission gear 71 and the second transmission gear 97 can be automatically dynamically adjusted according to the heating condition of the power element 5 during the heat dissipation process, compared with the temperature detection mode of the existing temperature sensor, the reliability and the adjustment accuracy of the heat dissipation adjustment are improved.

[0044] In addition, the embodiment sets the cover 2 slidingly connected to the shell 1, so that the air inlet 11 and the air outlet 21 are in the closed state when the non-working state, that is, no heat is generated, preventing mosquitoes from entering the shell 1, and further improving the reliability of the overall structure.

[0045] The high-stability outdoor ceiling lamp driving power supply, in some embodiments, as shown in Figures 1 to 3 、 Figure 5 The outer peripheral wall of the heat dissipation body 81 is provided with a spiral heat dissipation fin 84. The embodiment sets the spiral heat dissipation fin 84, so that when the suction mechanism generates the heat dissipation airflow, the heat dissipation airflow can flow along the spiral heat dissipation fin 84, the flow path of the heat dissipation airflow is prolonged, so that the heat dissipation airflow sufficiently absorbs the heat emitted by the heat dissipation body 81, and the heat dissipation effect is further improved.

[0046] The high-stability outdoor ceiling lamp driving power supply, in some embodiments, as shown in Figure 1 、 Figure 3 、 Figure 5 The bottom of the heat dissipation body 81 is provided with a containing groove 85 for containing the power element 5. The embodiment sets the containing groove 85, so that the heat dissipation body 81 and the power element 5 are stably matched, and the overall structure is more compact.

[0047] The high-stability outdoor ceiling lamp driving power supply, in some embodiments, as shown in Figure 1 、 Figure 3 and Figure 4As shown, the housing 1 is provided with a water guide groove 12, the groove bottom of the water guide groove 12 is provided with a plurality of drainage holes 13, the suction mechanism further comprises a rotating disc 63 rotatably arranged on the suction support 61, the suction rotor 62 is fixedly connected with the rotating disc 63, and the rotating disc 63 is provided with a water scraping mechanism 10. Through the arrangement of the water guide groove 12, the drainage hole 13 and the water scraping mechanism 10, in the rain and snow environment or the environment with heavy fog, when the cover 2 is extended, the liquid water accumulated on the air inlet 11 may enter the inner side wall of the housing 1 along with the heat dissipation airflow, and then slide along the inner side wall of the housing 1 to the water guide groove 12. At this time, when the suction rotor 62 rotates, the suction rotor 62 drives the rotating disc 63 to rotate, the rotating disc 63 drives the water scraping mechanism 10 to rotate, the water droplets on the groove wall of the water guide groove 12 are scraped and fall to the groove bottom of the water guide groove 12, so that the scraped water droplets are discharged from the drainage hole 13, and the risk of short circuit caused by the water entering the power board 3 is avoided. Specifically, the number of the water scraping mechanism 10 can be set to be multiple, and can be freely set according to actual design requirements.

[0048] In this embodiment, as shown in Figures 1 to 4 、 Figure 7 The water scraping mechanism 10 comprises a water scraping guide seat 101, a gear 102 rotatably connected to the water scraping guide seat 101, a first rack 103 and a second rack 104 which are connected side by side and slide on the water scraping guide seat 101, a torsional spring 105 connected between the gear 102 and the water scraping guide seat 101, the first rack 103 and the second rack 104 are engaged with the gear 102, one end of the first rack 103 is connected with a flexible water scraping piece 106 extending into the water guide groove 12, and one end of the second rack 104 is connected with a first counterweight 107.

[0049] Initially, under the action of the torsional spring 105, the first rack 103 makes the flexible water scraping piece 106 abut against the outer groove wall of the water guide groove 12.

[0050] When the cover 2 is extended, the rotating speed of the suction rotor 62 is low, the flexible water scraping piece 106 abuts against the outer groove wall of the water guide groove 12, so as to scrape the water droplets on the groove wall of the water guide groove 12 to the groove bottom position of the water guide groove 12. With the further extension of the cover 2, the rotating speed of the suction rotor 62 increases, that is, the rotating speed of the rotating disc 63 increases, the centrifugal force acting on the first counterweight 107 increases, when the centrifugal force is greater than the elastic force of the torsional spring 105, the second rack 104 drives the first counterweight 107 to extend, the first rack 103 drives the flexible water scraping piece 106 to retract, so that the normal pressure between the flexible water scraping piece 106 and the outer groove wall of the water guide groove 12 decreases, thereby reducing the running resistance of the rotating disc 63, improving the operating efficiency, reducing the wear of the flexible water scraping piece 106, and prolonging the service life of the flexible water scraping piece 106.

[0051] In this embodiment, the inner top of the cover 2 is also fixed with a second counterweight, through which the cover 2 can be retracted into the shell 1 in a non-working state.

[0052] The above is only one preferred embodiment of the present application, so equivalent changes or modifications made according to the structure, features and principles described in the scope of the present application are included in the protection scope of the present application.

Claims

1. A highly stable outdoor pendant light driver power supply, characterized in that, The shell and the cover slidingly connected with the shell; The shell is internally provided with a power panel, a pressure sensor electrically connected with the power panel, and a power element arranged on the power panel, and is further provided with a suction mechanism and a transmission mechanism in transmission connection with the suction mechanism, and is provided with an air inlet; The cover is provided with a heat dissipation sensing assembly capable of driving the cover to slide and a variable speed driving mechanism in transmission connection with the transmission mechanism, and is provided with an air outlet; Initially, the cover is pressed against the pressure sensor, and the air inlet and the air outlet are in a closed state; The heat dissipation sensing assembly comprises a heat dissipation body and a piston rod, the bottom of the heat dissipation body is in abutment with the power element, the heat dissipation body is internally provided with a cavity, one end of the piston rod is movably inserted into the cavity and forms an expansion cavity with the cavity, the expansion cavity is filled with an expansion liquid capable of being expanded by heat volatilization, and the other end of the piston rod is fixedly connected with the cover; The transmission mechanism comprises a conical first transmission gear, and the variable speed driving mechanism comprises a conical second transmission gear in elastic sliding connection, and the first transmission gear is in meshing connection with the second transmission gear; The variable speed driving mechanism comprises a variable speed support, a driving motor arranged on the variable speed support, a variable speed sliding block slidingly arranged on the variable speed support, a spring arranged between the variable speed sliding block and the variable speed support, a first bevel gear rotatably arranged on the variable speed sliding block, and a second bevel gear sleeved on the second transmission gear, the first bevel gear is further in surface sleeve connection with the output end of the driving motor and can slide relative to the driving motor, the second transmission gear is rotatably arranged on the variable speed sliding block, the axis of the first bevel gear is perpendicular to the axis of the second transmission gear, and the second bevel gear is in meshing connection with the first bevel gear.

2. The high-stability outdoor ceiling lamp driving power supply according to claim 1, characterized in that, The outer peripheral wall of the heat dissipation body is provided with helical heat dissipation fins.

3. The high-stability outdoor ceiling lamp driving power supply according to claim 1, characterized in that, The bottom of the heat dissipation body is provided with a containing groove for containing the power element.

4. The high-stability outdoor ceiling lamp driving power supply according to claim 1, characterized in that, The transmission mechanism comprises a transmission support fixedly connected to the inner side wall of the shell, and a friction wheel rotatably arranged on the transmission support, the first transmission gear is in fixed sleeve connection with the friction wheel, the friction wheel is connected with the suction mechanism, and the pressure sensor is arranged on the transmission support.

5. The high-stability outdoor ceiling lamp driving power supply according to claim 4, characterized in that, The suction mechanism comprises a suction support fixedly arranged in the shell, and a suction rotor rotatably arranged on the suction support, and the friction wheel is connected with the outer peripheral wall of the suction rotor.

6. The high-stability outdoor ceiling lamp driving power supply according to claim 5, characterized in that, The shell is internally provided with a water guide groove, the groove bottom of the water guide groove is provided with a plurality of drainage holes, the suction mechanism further comprises a rotating disc rotatably arranged on the suction support, the suction rotor is fixedly connected with the rotating disc, and a water scraping mechanism is arranged on the rotating disc.

7. The high-stability outdoor ceiling lamp driving power supply according to claim 6, characterized in that, The water scraping mechanism comprises a water scraping guide seat, a gear rotatably connected to the water scraping guide seat, a first rack and a second rack slidingly connected side by side to the water scraping guide seat, a torsional spring further connected between the gear and the water scraping guide seat, the first rack and the second rack are in meshing connection with the gear, one end of the first rack is connected with a flexible water scraping piece inserted into the water guide groove, and one end of the second rack is connected with a first counterweight. Initially, under the action of the torsional spring, the first rack makes the flexible water scraping piece abut against the outer groove wall of the water guide groove.

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