A photovoltaic inverter power transformer

Abstract

The present invention provides a photovoltaic inverter power transformer, including: a photovoltaic inverter power box, an inverter power mainboard is detachably installed inside by bolts, and the back of the inverter power mainboard is electrically connected to a power transformer through a terminal, and the power transformer runs through the back of the photovoltaic inverter power box; an air temperature sensor, and three groups of air temperature sensors are provided. The present invention can detect the autonomous heat dissipation efficiency, can actively assist in heat dissipation when the autonomous heat dissipation efficiency is poor, reduce excessive energy consumption, and improve heat dissipation performance, so as to solve the problem that the existing outdoor environment is often inconvenient for manual maintenance and maintenance, and its heat dissipation capacity is greatly weakened, wherein the heat absorption and heat conduction capacity of the heat dissipation fins mainly relied on will be reduced, and the situation of autonomous heat dissipation cannot be detected, resulting in missing the main opportunity to assist in heat dissipation, reducing the efficiency of important conversion periods, and affecting the service life of the internal mainboard and transformer.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic inverter technology, and in particular to a photovoltaic inverter power transformer. Background Art

[0002] Photovoltaic inverter power transformer is a key component used in photovoltaic inverter systems. Its main function is to convert the direct current generated by photovoltaic modules into alternating current, and transform and adjust the voltage to meet different load requirements.

[0003] Specifically, a photovoltaic inverter power transformer usually includes the following parts: 1. Input end: connected to the DC output of the photovoltaic module, introducing DC power into the transformer. 2. Transformer body: through the principle of electromagnetic induction, DC power is stepped up or down. 3. Output end: provides converted AC power, which is supplied to the load or connected to the power grid.

[0004] The design and performance characteristics of the photovoltaic inverter transformer will affect the efficiency, stability and reliability of the entire inverter system. It needs to have an appropriate turns ratio, insulation performance and heat dissipation capacity to ensure efficient power conversion and safe operation. By using a photovoltaic inverter transformer, the effective utilization and management of photovoltaic power can be achieved, so that it can meet the needs of different application scenarios, such as grid-connected power generation, independent power supply system, etc. At the same time, the transformer can also play a role of isolation and protection.

[0005] In the existing technology, the outdoor environment makes it inconvenient for manual inspection and maintenance in many cases, and its heat dissipation capacity is greatly weakened. The ability of the heat sink fins, which mainly rely on heat absorption and heat conduction, will be reduced, and the autonomous heat dissipation cannot be detected, resulting in missing the main opportunity to assist in heat dissipation, reducing the efficiency of important conversion periods, and affecting the service life of the internal motherboard and transformer. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a photovoltaic inverter power transformer, which can detect the autonomous heat dissipation efficiency, actively assist in heat dissipation when the autonomous heat dissipation efficiency is poor, reduce excessive energy consumption, and improve heat dissipation performance, so as to solve the problem that the existing outdoor environment often makes it inconvenient for manual inspection and maintenance, and its heat dissipation capacity is greatly weakened, among which the heat dissipation fins that mainly rely on the ability to absorb and conduct heat will be reduced, and the autonomous heat dissipation cannot be detected, resulting in missing the main opportunity to assist in heat dissipation, reducing the efficiency of important conversion periods, and affecting the service life of the internal motherboard and the transformer.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solution: a photovoltaic inverter power transformer, comprising:

[0008] The photovoltaic inverter power box has an inverter power mainboard detachably mounted therein by bolts, and the back of the inverter power mainboard is electrically connected to a power transformer through a terminal, and the power transformer runs through the back of the photovoltaic inverter power box;

[0009] An air temperature sensor, wherein three groups of air temperature sensors are provided, and the three groups of air temperature sensors are longitudinally and equidistantly distributed on a side of the power transformer away from the photovoltaic inverter power box, and are used to detect the air temperature around the power transformer;

[0010] The heat dissipation fins are integrally formed on the back of the photovoltaic inverter power box to dissipate the heat generated on the back of the inverter power mainboard;

[0011] A water collecting tank is fixedly installed on the top of the photovoltaic inverter power box, used to collect rainwater or store cooling water. A support plate is fixedly installed at the top center of the water collecting tank. A rain-sensing dust-proof component for preventing external dust from entering the water collecting tank is fixedly installed on the top of one side of the water collecting tank. A water pipe joint is connected to the top of one side of the water collecting tank.

[0012] The driving unit comprises a driving support block and a double-headed motor, wherein the driving support block is fixedly mounted on a side of the water collecting tank away from the inverter power supply mainboard, and the double-headed motor is fixedly mounted on the driving support block by bolts;

[0013] A first driving clutch support plate is fixedly mounted on the rear side of the top of the support plate by bolts, a second driving clutch support plate is fixedly mounted on the back of the water collecting tank, and a linkage clutch control mechanism is arranged on the back of the first driving clutch support plate and the second driving clutch support plate, and the linkage clutch control mechanism is used to independently control the top output end and the bottom output end of the double-headed motor without power failure of the double-headed motor;

[0014] The upper and lower linkage air blowing and heat dissipation mechanism is fixedly installed on the back of the photovoltaic inverter power box, and is used to cooperate with the drive unit to perform upper and lower driving air blowing and heat dissipation;

[0015] The synchronous negative pressure spray heat dissipation mechanism is arranged on the top of the support plate, and is used to link the power of the driving component to perform synchronous negative pressure water pumping and spraying to spray and dissipate heat on the heat dissipation fins.

[0016] Furthermore, the rain sensing and dustproof assembly includes a rain sensor, a double-headed electric push rod, a sealing cover and a connecting rod. The rain sensor is fixedly installed on the front side of the top of the support plate, the double-headed electric push rod is fixedly installed on the top of the water collecting tank away from the heat dissipation fins, the connecting rod is fixedly installed on the two output ends of the double-headed electric push rod, and the sealing cover is fixedly installed on the connecting rod and slides with the top of the water collecting tank.

[0017] Furthermore, the linkage clutch control mechanism includes a rotation limiting frame, a driving sleeve, a spring, a synchronization rod, a tilting frame, a round tilting block, an upper ratchet chuck, a clutch control frame, a control assembly, a lower ratchet chuck and a connecting plate. The two groups of the rotation limiting frames are respectively fixedly mounted on the top of the back side of the first driving clutch support plate and the top of the back side of the second driving clutch support plate. The two groups of the clutch control frames are respectively fixedly mounted on the bottom of the back side of the first driving clutch support plate and the bottom of the back side of the second driving clutch support plate. The driving sleeve is rotatably mounted inside the rotation limiting frame. The spring sleeve is arranged on the surface of the synchronization rod. The top of the synchronization rod is slidably matched with the internal limit of the driving sleeve. The bottom of the synchronization rod is fixedly mounted on the top of the upper ratchet chuck. The round tilting block is fixedly mounted on the The cam is fixedly installed on one side of the upper ratchet chuck close to the synchronization rod, and the tilting frame is slidably installed between the synchronization rod and the upper ratchet chuck, and the connecting plate is welded to the top of the back side of the photovoltaic inverter power box, and the lower ratchet chuck located on the second driving clutch support plate is rotatably installed inside the connecting plate and is engaged with the upper ratchet chuck, the bottom of the spring contacts the bottom of the surface of the synchronization rod, and the top of the spring contacts the bottom of the driving sleeve, and the control assembly is arranged at the bottom of the rotation limiting frame for controlling the tilting frame to tilt the synchronization rod up and down, the top of the driving sleeve installed on the second driving clutch support plate is fixedly installed on the bottom output end of the double-head motor, and the bottom of the lower ratchet chuck installed on the first driving clutch support plate is fixedly installed on the top output end of the double-head motor.

[0018] Furthermore, the upper and lower linked air blowing and heat dissipation mechanism includes a screw rod 1, a synchronous frame, a limit rod frame, a heat dissipation fan and a stabilizing plate. The top of the screw rod 1 is fixedly connected to the bottom of the lower ratchet chuck rotating inside the connecting plate. The synchronous frame is threadedly connected to the surface of the screw rod 1. The limit rod frame is fixedly installed on both sides of the back of the photovoltaic inverter power box by bolts. The two ends of the synchronous frame are slidingly matched with the surface of the limit rod frame. The heat dissipation fan is fixedly installed on both sides of the synchronous frame. The stabilizing plate is welded to the bottom of the back of the photovoltaic inverter power box and rotatably cooperates with the bottom of the screw rod 1.

[0019] Furthermore, the synchronous negative pressure spray heat dissipation mechanism includes a stabilizing block, a rotating rod, a driving gear, a gear plate one, a linkage gear, a gear plate two, a gear plate three, a gear plate four, a spray pipe and a reciprocating negative pressure pumping assembly. The stabilizing block is fixedly mounted on the front side of the first driving clutch support plate, the rotating rod is rotatably mounted inside the stabilizing block, the gear plate is connected to the top of the rotating rod with one key, the linkage gear is fixedly mounted on the bottom of the rotating rod, the driving gear is fixedly mounted on the surface of the driving sleeve located on the first driving clutch support plate, the gear plate two is rotatably mounted on the top of the support plate through the rotating shaft at the top of the support plate, and is meshed with the linkage gear, the gear plate three is rotatably mounted on the top of the support plate through the rotating shaft at the top of the support plate and is located on the front side of the gear plate two, the gear plate three is meshed with the gear plate two, the gear plate four is rotatably mounted on the top of the support plate and is meshed with the gear plate three, the spray pipe is arranged on the rear side of the water collecting tank, and the reciprocating negative pressure pumping assembly is arranged at the bottom of the inner wall of the water collecting tank, and is used to rotate the linkage gear plate four to perform negative pressure pumping and spraying. The stabilizing block can limit the rotation of the rotating rod, and the driving gear can follow the rotation of the driving sleeve for linkage transmission, and the rotating driving gear can drive the gear plate one meshing with it to rotate. The rotation of the gear plate one drives the gear plate two meshing with it to rotate through the coaxially fixed linkage gear. The rotation of the gear plate two drives the rotation of the meshing gear, and the rotation drives the gear plate three meshing with it to rotate, and the reciprocating negative pressure pumping component is driven by the gear plate three, so that it can perform pumping operations synchronously.

[0020] Furthermore, the control component includes a stepper motor, a pressure block, a second screw rod, a seesaw and a prying shaft, the stepper motor is fixedly mounted on a side of a clutch control frame away from a water collecting tank, the pressure block is threadedly connected to the surface of the second screw rod, the second screw rod is fixedly mounted on the output end of the stepper motor, the seesaw is movably mounted on the surface of the prying shaft, both ends of the prying shaft are fixedly mounted on the clutch control frame, and the seesaw is fixedly mounted on the seesaw frame.

[0021] Furthermore, the reciprocating negative pressure pumping assembly includes a linkage rod, a stabilizing frame, a driving disk, a mounting base plate, a sliding rod, a driving frame, a synchronous plate, a negative pressure unit and a synchronous piston rod. The top of the linkage rod passes through the support plate and is fixedly mounted on the gear plate four, the bottom of the linkage rod rotates with the stabilizing frame, the stabilizing frame is fixedly mounted on the side of the top of the mounting base plate close to the linkage rod, the bottom of the mounting base plate is fixedly mounted to the bottom of the inner wall of the water collecting tank by bolts, the driving disk is fixedly mounted on the bottom of the linkage rod, the sliding rod is fixedly mounted on the side of the bottom of the driving disk away from the stabilizing frame, the driving frame is slidably sleeved on the surface of the sliding rod, the synchronous plate is fixedly mounted on the driving frame, the synchronous piston rod is plugged and mounted on the top of the synchronous plate, the negative pressure unit is arranged on the top of the mounting base plate, and the negative pressure unit is used to convert the reciprocating structure into negative pressure power for pumping operations.

[0022] Furthermore, the negative pressure unit includes a piston cylinder, a clamp, a one-way water inlet valve, a piston block, a one-way water outlet valve and a filter ball. The piston cylinder is fixedly mounted on the top of the mounting base plate through the clamp. The one-way water inlet valve is connected to the side of the piston cylinder away from the synchronous piston rod. The one-way water outlet valve is connected to the side of the piston cylinder away from the one-way water inlet valve. The one-way water inlet valve is connected to the spray pipe through a water pipe penetrating the water collecting tank. The piston block is fixedly mounted on one end of the synchronous piston rod away from the synchronous plate. The clamp is fixedly mounted on the top of the synchronous plate and is located on the surface of the piston cylinder. The surface of the piston block is sealed with the inner wall of the piston cylinder through a sealing ring. The one-way water inlet valve is connected to the filter ball through a water pipe, and the filter ball is suspended from the bottom of the inner wall of the water collecting tank by its own weight.

[0023] Furthermore, limit frames are rotatably installed on both sides of the surface of the spray pipe, and the limit frames are welded and fixed to the surface of the water collecting tank, and the bottom of the spray pipe is connected to a spray head.

[0024] Beneficial effects of the present invention: The present invention detects the ambient air temperature of the power transformer through an air temperature sensor, and then analyzes the autonomous heat dissipation efficiency based on the temperature data, and then starts the double-headed motor to cooperate with the linkage clutch control mechanism to perform separate blowing heat dissipation and spray cooling on the upper and lower linkage air blowing heat dissipation mechanisms and the synchronous negative pressure spray heat dissipation mechanisms, and at the same time cooperates with the rain sensing dustproof component to analyze the rain situation in the water collecting tank and synchronously perform water collection or sealed dustproof operations on the top of the water collecting tank, thereby ensuring the water collection efficiency and having outdoor energy-saving and heat dissipation effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0028] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of the photovoltaic inverter power box;

[0029] Figure 4 A schematic diagram of the three-dimensional structure of the water collecting tank is shown;

[0030] Figure 5 It is a partial three-dimensional rear view of the present invention;

[0031] Figure 6 For the present invention Figure 2 The enlarged view of the middle A shows the second drive clutch support plate;

[0032] Figure 7It is a three-dimensional structural schematic diagram of the piston cylinder of the present invention;

[0033] Figure 8 It is a schematic diagram of the three-dimensional structure of the installation base plate of the present invention.

[0034] In the figure: 1. photovoltaic inverter power box; 11. inverter power mainboard; 2. water collecting tank; 21. sealing cover; 22. double-head electric push rod; 23. connecting rod; 24. support plate; 241. rain sensor; 242. linkage rod; 243. stabilizing frame; 244. drive plate; 245. mounting base plate; 246. slide rod; 247. drive frame; 248. synchronous plate; 249. synchronous piston rod; 2491. piston cylinder; 2492. clamp; 2493. one-way water inlet valve; 2494. piston block; 2495. one-way water outlet valve; 2497. filter ball; 2499. spray pipe; 25. drive support block; 251. double-head motor; 26. first drive clutch support plate; 261. stabilizing block; 262. rotating rod; 263. drive gear Wheel; 264, gear plate one; 265, linkage gear; 266, gear plate two; 267, gear plate three; 268, gear plate four; 27, second drive clutch support plate; 281, screw rod one; 282, synchronous frame; 283, limit rod frame; 284, cooling fan; 285, stabilizing plate; 291, rotation limiting frame; 292, driving sleeve; 293, spring; 294, synchronous rod; 295, tilting frame; 2951, round tilting block; 296, upper ratchet chuck; 297, clutch control frame; 2971, stepping motor; 2972, pressure block; 2973, screw rod two; 2974, rocker; 2975, prying shaft; 298, lower ratchet chuck; 299, connecting plate; 3, heat sink; 4, power transformer; 5, air temperature sensor. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of the present invention.

[0037] The present invention provides a photovoltaic inverter power transformer, comprising: a photovoltaic inverter power box 1, an inverter power mainboard 11 is detachably mounted inside by bolts, and the back of the inverter power mainboard 11 is electrically connected to a power transformer 4 by a terminal, and the power transformer 4 penetrates to the back of the photovoltaic inverter power box 1;

[0038] Air temperature sensors 5, and three groups of air temperature sensors 5 are provided. The three groups of air temperature sensors 5 are longitudinally and equidistantly distributed on a side of the power transformer 4 away from the photovoltaic inverter power box 1, and are used to detect the air temperature around the power transformer 4;

[0039] The heat dissipation fins 3 are integrally formed on the back of the photovoltaic inverter power supply box 1 and are used to dissipate the heat generated by the air temperature sensor 5 and the back of the inverter power supply mainboard 11;

[0040] A water collecting tank 2 is fixedly installed on the top of the photovoltaic inverter power box 1, and is used to collect rainwater or store cooling water. A support plate 24 is fixedly installed at the top center of the water collecting tank 2. A rain-sensing dust-proof component for preventing external dust from entering the water collecting tank 2 is fixedly installed on the top of one side of the water collecting tank 2. A water pipe joint is connected to the top of one side of the water collecting tank 2.

[0041] The driving unit includes a driving support block 25 and a double-headed motor 251. The driving support block 25 is fixedly mounted on a side of the water collecting tank 2 away from the inverter power supply mainboard 11. The double-headed motor 251 is fixedly mounted on the driving support block 25 by bolts;

[0042] The first driving clutch support plate 26 is fixedly mounted on the rear side of the top of the support plate 24 by bolts, and the second driving clutch support plate 27 is fixedly mounted on the back of the water collecting tank 2. The backs of the first driving clutch support plate 26 and the second driving clutch support plate 27 are both provided with a linkage clutch control mechanism, which is used to independently control the top output end and the bottom output end of the double-headed motor 251 without power failure of the double-headed motor 251;

[0043] The upper and lower linkage blowing and cooling mechanism is fixedly installed on the back of the photovoltaic inverter power box 1, and is used to cooperate with the driving unit to perform upper and lower driving blowing and cooling;

[0044] The synchronous negative pressure spray heat dissipation mechanism is arranged on the top of the support plate 24 and is used to link the power of the driving component to perform synchronous negative pressure water pumping and spraying to spray and dissipate heat on the heat dissipation fins 3.

[0045] See also Figure 2 Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the exploded three-dimensional structure of a photovoltaic inverter power box; Figure 4 A schematic diagram of the three-dimensional structure of the water collecting tank is shown; Figure 5 It is a partial three-dimensional rear view of the present invention; Figure 6 For the present invention Figure 2 The enlarged view of the middle A shows the second drive clutch support plate; Figure 7 It is a three-dimensional structural schematic diagram of the piston cylinder of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the installation base plate of the present invention.

[0046] The rain sensor and dustproof assembly includes a rain sensor 241, a double-headed electric push rod 22, a sealing cover 21 and a connecting rod 23. The rain sensor 241 is fixedly mounted on the front side of the top of the support plate 24, the double-headed electric push rod 22 is fixedly mounted on the top of the water collecting tank 2 away from the heat dissipation fin 3, and the connecting rod 23 is fixedly mounted on the two output ends of the double-headed electric push rod 22. The sealing cover 21 and the connecting rod 23 are fixedly mounted and slidably cooperate with the top of the water collecting tank 2. The rain sensor 241 detects whether it is rainy. If it detects rain, the double-headed electric push rod 22 is activated to The output end drives the connecting rod 23 to push the two ends of the double-headed electric push rod 22, and simultaneously drives the sealing cover 21 to move to both sides and separate from the top of the water collecting tank 2, so that rainwater can enter easily. When the rainy season ends and the rain stops, the double-headed electric push rod 22 is started again to drive the connecting rod 23 to move closer to each other and shrink the double-headed electric push rod 22, driving the sealing cover 21 to move closer to the support plate 24 for sealing, so as to prevent the storage quality inside the water collecting tank 2 from being affected by external dust, and at the same time reduce volatilization. The water can be connected to an external water source through the water pipe joint on one side of the water collecting tank 2 for water replenishment.

[0047] The linkage clutch control mechanism includes a rotation limiting frame 291, a driving sleeve 292, a spring 293, a synchronization rod 294, a tilting frame 295, a round tilting block 2951, an upper ratchet chuck 296, a clutch control frame 297, a control assembly, a lower ratchet chuck 298 and a connecting plate 299. Two groups of rotation limiting frames 291 are respectively fixedly mounted on the top of the back side of the first driving clutch support plate 26 and the top of the back side of the second driving clutch support plate 27. Two groups of clutch control frames 297 are respectively fixedly mounted on the bottom of the back side of the first driving clutch support plate 26 and the bottom of the back side of the second driving clutch support plate 27. The driving sleeve 292 is rotatably mounted inside the rotation limiting frame 291. The spring 293 is sleeved on the surface of the synchronization rod 294. The top of the synchronization rod 294 is slidably matched with the internal limit of the driving sleeve 292. The bottom of the synchronization rod 294 is fixedly mounted on the top of the upper ratchet chuck 296.

[0048] The round tilting block 2951 is fixedly mounted on one side of the upper ratchet chuck 296 close to the synchronization rod 294, the tilting frame 295 is slidably mounted between the synchronization rod 294 and the upper ratchet chuck 296, the connecting plate 299 is welded to the top of the back of the photovoltaic inverter power supply box 1, the lower ratchet chuck 298 located on the second driving clutch support plate 27 is rotatably mounted inside the connecting plate 299, and is engaged with the upper ratchet chuck 296, the bottom of the spring 293 contacts the bottom of the surface of the synchronization rod 294, and the top of the spring 293 contacts the bottom of the driving sleeve 292, the control component is arranged at the bottom of the rotation limiting frame 291, and is used to control the tilting frame 295 to tilt the synchronization rod 294 up and down, the top of the driving sleeve 292 installed on the second driving clutch support plate 27 is fixedly mounted to the bottom output end of the double-headed motor 251, and the bottom of the lower ratchet chuck 298 installed on the first driving clutch support plate 26 is fixedly mounted to the top output end of the double-headed motor 251;

[0049] When synchronous transmission is required, the spring 293 is reset by elastic force, and at the same time, the control component is retracted to press the tilting frame 295 downward, so that the synchronous rod 294 can be pressed downward by the elastic force of the spring 293, so that the synchronous rod 294 presses the upper ratchet chuck 296, and the upper ratchet chuck 296 is downwardly clamped and meshed with the lower ratchet chuck 298, so that the output end at the bottom of the double-headed motor 251 drives the synchronous rod 294 to rotate through the driving sleeve 292, and then drives the upper ratchet chuck 296 to rotate through the synchronous rod 294, and the upper ratchet chuck 296 will rotate the lower ratchet chuck 298 meshing with it synchronously, so that it is driven by the lower ratchet chuck 298. The screw 281 rotates to assist in air cooling and heat dissipation. At the same time, the lower ratchet chuck 298 on the top output end of the double-headed motor 251 can drive the upper ratchet chuck 296 to rotate and the synchronization rod 294 to rotate, and then the rotation of the synchronization rod 294 drives the drive sleeve 292 to rotate, and the drive sleeve 292 drives the drive gear 263 to rotate. When one of the groups needs to disconnect the synchronous operation, the control component is started to drive the tilting frame 295 to cooperate with the round tilting block 2951 to push the synchronization rod 294 upward, so that the synchronization rod 294 drives the upper ratchet chuck 296 to lift up and separate from the lower ratchet chuck 298, so that the upper ratchet chuck 296 is disconnected from the lower ratchet chuck 298.

[0050] The upper and lower linkage blowing and heat dissipation mechanism includes a screw rod 281, a synchronous frame 282, a limit rod frame 283, a heat dissipation fan 284 and a stabilizing plate 285. The top of the screw rod 281 is fixedly connected to the bottom of the lower ratchet chuck 298 rotating inside the connecting plate 299. The synchronous frame 282 is threadedly connected to the surface of the screw rod 281. The limit rod frame 283 is fixedly installed on both sides of the back of the photovoltaic inverter power box 1 by bolts. The two ends of the synchronous frame 282 are slidably matched with the surface of the limit rod frame 283. The heat dissipation fan 284 is fixedly installed on both sides of the synchronous frame 282. The stabilizing plate 285 is welded to the bottom of the back of the photovoltaic inverter power box 1 and is rotatably matched with the bottom of the screw rod 281.

[0051] After being driven to rotate by the lower ratchet chuck 298, the screw 281 drives the synchronous frame 282 limited by the limiting rod frame 283 to drive the up and down position, and synchronously starts the cooling fan 284 to blow air up and down to dissipate heat to the cooling fins 3, and dissipate heat to the power transformer 4, and at the same time blows away the dust on the surface of the cooling fins 3 to maintain the self-heating efficiency of the cooling fins 3. The stabilizing plate 285 can limit the rotation of the screw 281 to ensure the stability of the screw 281 during rotation.

[0052] The synchronous negative pressure spray heat dissipation mechanism includes a stabilizing block 261, a rotating rod 262, a driving gear 263, a gear plate 1 264, a linkage gear 265, a gear plate 2 266, a gear plate 3 267, a gear plate 4 268, a spray pipe 2499 and a reciprocating negative pressure pumping assembly. The stabilizing block 261 is fixedly mounted on the front of the first driving clutch support plate 26, the rotating rod 262 is rotatably mounted inside the stabilizing block 261, the gear plate 1 264 is key-connected to the top of the rotating rod 262, and the linkage gear 265 is fixedly mounted on the bottom of the rotating rod 262. , the driving gear 263 is fixedly mounted on the surface of the driving sleeve 292 located on the first driving clutch support plate 26, the gear plate 266 is rotatably mounted on the top of the support plate 24 through the rotating shaft at the top of the support plate 24, and is meshed with the linkage gear 265, the gear plate 3 267 is rotatably mounted on the top of the support plate 24 through the rotating shaft at the top of the support plate 24 and is located on the front side of the gear plate 266, the gear plate 3 267 is meshed with the gear plate 266, and the gear plate 4 268 is rotatably mounted on the top of the support plate 24 and is meshed with the gear plate 3 267;

[0053] The spray pipe 2499 is arranged on the rear side of the water collecting box 2, and the reciprocating negative pressure pumping assembly is arranged at the bottom of the inner wall of the water collecting box 2, which is used to link the rotation of the gear plate four 268 to perform negative pressure pumping and spraying; the stabilizing block 261 can limit the rotation of the rotating rod 262, and at the same time, the driving gear 263 can follow the rotation of the driving sleeve 292 for linkage transmission, and the rotated driving gear 263 can drive the gear plate one 264 meshing with it to rotate, and the rotation of the gear plate one 264 drives the gear plate two 266 meshing with it to rotate through the coaxially fixed linkage gear 265, and the rotation of the gear plate two 266 drives the gear plate three 267 meshing with it to rotate, and the rotation of the gear plate three 267 drives the gear plate four 268 meshing with it to rotate, and the reciprocating negative pressure pumping assembly is driven by the gear plate four 268, so that it can perform synchronous pumping operations.

[0054] The control assembly includes a stepper motor 2971, a pressure block 2972, a screw rod 2973, a seesaw 2974 and a prying shaft 2975. The stepper motor 2971 is fixedly mounted on the side of the clutch control frame 297 away from the water collecting tank 2. The pressure block 2972 ​​is threadedly connected to the surface of the screw rod 2973. The screw rod 2973 is fixedly mounted on the output end of the stepper motor 2971. The seesaw 2974 is movably mounted on the surface of the prying shaft 2975. Both ends of the prying shaft 2975 are fixedly mounted on the clutch control frame 297. The seesaw 2974 is fixedly mounted on the prying frame 295. The stepper motor 2971 can drive the screw rod 2973 to rotate after starting. The screw rod 2973 can rotate. The rotation of 973 can drive the pressure block 2972 ​​to move up and down after the clutch control frame 297 is limited. When the pressure block 2972 ​​moves downward, it can press the rocker 2974 to lift up the side close to the clutch control frame 297, and then pry the right side through the prying shaft 2975 to drive the tilting frame 295 to move upward, and cooperate with the round tilting block 2951 to pry the synchronization rod 294 upward. When the upper ratchet chuck 296 needs to engage with the lower ratchet chuck 298, the pressure block 2972 ​​is driven to move upward, so that the rocker 2974 loses the downward pressure, which facilitates the release of the elastic force of the spring 293 to press the synchronization rod 294 downward to drive the upper ratchet chuck 296 to engage with the lower ratchet chuck 298.

[0055] The reciprocating negative pressure pumping assembly includes a linkage rod 242, a stabilizing frame 243, a driving disk 244, a mounting base 245, a sliding rod 246, a driving frame 247, a synchronous plate 248, a negative pressure unit and a synchronous piston rod 249. The top of the linkage rod 242 passes through the support plate 24 and is fixedly installed with the gear plate 268. The bottom of the linkage rod 242 rotates with the stabilizing frame 243. The stabilizing frame 243 is fixedly installed on the top of the mounting base 245 close to the linkage rod 242. The bottom of the mounting base 245 is fixedly installed with the bottom of the inner wall of the water collecting tank 2 by bolts. The driving disk 244 is fixedly installed at the bottom of the linkage rod 242. The sliding rod 246 is fixedly installed at the bottom of the driving disk 244 on the side away from the stabilizing frame 243. The driving frame 247 is slidably sleeved on the surface of the sliding rod 246. The plate 248 is fixedly installed with the driving frame 247, the synchronous piston rod 249 is plugged and installed on the top of the synchronous plate 248, and the negative pressure unit is arranged on the top of the mounting base plate 245. The negative pressure unit is used to convert the reciprocating structure into negative pressure power for pumping operation; the linkage rod 242 can be driven to rotate by the rotating gear plate four 268, and the linkage rod 242 is limited by the stabilizing frame 243 to ensure stable rotation. The linkage rod 242 drives the driving plate 244 to rotate, and the driving plate 244 drives the sliding rod 246 to rotate. The rotation of the sliding rod 246 drives the driving frame 247 to move forward and backward. The driving frame 247 that moves forward and backward can drive the synchronous plate 248 fixed thereto to move forward and backward. The synchronous plate 248 drives the six synchronous piston rods 249 to move synchronously, and cooperates with the negative pressure unit to form negative pressure for pumping operation.

[0056] The negative pressure unit includes a piston cylinder 2491, a clamp 2492, a one-way water inlet valve 2493, a one-way water outlet valve 2495 and a filter ball 2497. The piston cylinder 2491 is fixedly installed on the top of the mounting base plate 245 through the clamp 2492. The one-way water inlet valve 2493 is connected to the side of the piston cylinder 2491 away from the synchronous piston rod 249. The one-way water outlet valve 2495 is connected to the side of the piston cylinder 2491 away from the one-way water inlet valve 2493. The one-way water inlet valve 2493 passes through the water collecting tank 2 and is connected to the spray pipe 2499 through a water pipe. The piston block 2494 is fixedly installed on one end of the synchronous piston rod 249 away from the synchronous plate 248. The clamp 2492 is fixedly installed on the top of the synchronous plate 248 and is located on the surface of the piston cylinder 2491. The surface of the piston block 2494 is sealed with the inner wall of the piston cylinder 2491 through a sealing ring, and the one-way water inlet valve 2493 is connected to the filter ball 2497 through a water pipe. The filter ball 2497 is suspended at the bottom of the inner wall of the water collecting tank 2 by its own weight; the synchronous piston rod 249 that moves forward and backward drives the piston block 2494 fixed thereto to move forward and backward. When the piston block 2494 moves backward, the one-way water inlet valve 2493 draws water under negative pressure, and then the piston block 2494 moves forward to pump the water drawn into the piston cylinder 2491 through the one-way water outlet valve 2495. The water in the piston cylinder 2491 is transported to the inside of the spray pipe 2499 through a water pipe and then sprayed from the bottom to cool the surface of the heat sink 3, rinse the surface of the heat sink 3, and eliminate impurities attached to the surface of the heat sink 3.

[0057] Limiting frames are rotatably installed on both sides of the surface of the spray pipe 2499, and the limiting frames are welded and fixed to the surface of the water collecting tank 2. The bottom of the spray pipe 2499 is connected to a spray head; the limiting frames can install the spray pipe 2499, and the spray head facilitates the uniform spraying of water drawn out by negative pressure.

[0058] Working principle: when installed outdoors, an external water source can be connected through a water pipe joint according to the outdoor environment, which is convenient for later pumping and replenishing water. Under normal circumstances, the rain sensor 241 can be used to detect whether it is a rainy day. If it is detected that it is raining, the double-headed electric push rod 22 is started and the connecting rod 23 can be driven to push toward the two ends of the double-headed electric push rod 22 through the output end, and the sealing cover 21 is simultaneously driven to move to both sides and separate from the top of the water collecting tank 2, which is convenient for rainwater to enter. When the rainy season ends and it is detected that the rain has stopped, the double-headed electric push rod 22 is started again to drive the connecting rod 23 to move closer to each other and the double-headed electric push rod 22 is contracted, driving the sealing cover 21 to move close to the support plate 24 for sealing, so as to prevent the storage quality inside the water collecting tank 2 from being affected by external dust and reduce volatilization at the same time. The external water source can be connected through the water pipe joint on one side of the water collecting tank 2 for water replenishment, and then the air temperature around the power transformer 4 is detected through the air temperature sensor 5, and then the autonomous heat dissipation efficiency of the heat dissipation fin 3 is determined through the temperature data;

[0059] If the self-heating efficiency is low, it can be determined whether the heat dissipation needs to be assisted by water cooling or air cooling according to the speed of temperature rise. If the two heat dissipation conditions are synchronized normally, when the upper ratchet chuck 296 needs to be meshed with the lower ratchet chuck 298, the stepper motor 2971 is started to drive the pressure block 2972 ​​to move upward, so that the rocker 2974 loses the downward pressure, so that the elastic force of the spring 293 is released to press the synchronization rod 294 downward to drive the upper ratchet chuck 296 to mesh with the lower ratchet chuck 298. At this time, it is convenient for the double-headed motor 251 to drive the lower ratchet chuck 298 on the connecting plate 299 to rotate through the output end, and drive the screw rod 281. After the screw rod 281 is driven to rotate by the lower ratchet chuck 298, it drives the synchronization frame 282 limited by the limit rod frame 283 to move up and down, and the heat dissipation fan 284 is started synchronously to blow air up and down to dissipate heat to the heat dissipation fins 3, and dissipate heat to the power transformer 4, and at the same time blow away the dust on the surface of the heat dissipation fins 3 to maintain the self-heating efficiency of the heat dissipation fins 3;

[0060] At the same time, the lower ratchet chuck 298 on the top output end of the double-headed motor 251 can drive the upper ratchet chuck 296 to rotate and the synchronous rod 294 to rotate, and then the synchronous rod 294 rotates to drive the driving sleeve 292 to rotate, and the driving gear 263 is driven to rotate through the driving sleeve 292. At this time, the rotated driving gear 263 can drive the gear plate 1 264 meshing therewith to rotate, and the gear plate 1 264 rotates to drive the gear plate 2 266 meshing therewith to rotate through the coaxially fixed linkage gear 265, and the gear plate 266 rotates to drive the gear plate 3 267 meshing therewith to rotate, and the gear plate 3 267 rotates to drive the gear plate 4 268 meshing therewith to rotate, and the linkage rod 242 is driven to rotate through the gear plate 4 268, and the linkage rod 242 is limited by the stabilizing frame 243 to ensure the stable rotation of the linkage rod 242, and the linkage rod 242 drives the driving plate 244 to rotate The driving plate 244 drives the slide bar 246 to rotate, and the rotation of the slide bar 246 drives the driving frame 247 to move forward and backward. The driving frame 247 that moves forward and backward can drive the synchronous plate 248 fixed thereto to move forward and backward. The synchronous plate 248 drives six synchronous piston rods 249 to move synchronously. The synchronous piston rod 249 that moves forward and backward drives the piston block 2494 fixed thereto to move forward and backward. When the piston block 2494 moves backward, the one-way water inlet valve 2493 draws water under negative pressure, and then the piston block 2494 moves forward to pump the water drawn into the piston cylinder 2491 through the one-way water outlet valve 2495. The water in the piston cylinder 2491 is transported to the inside of the spray pipe 2499 through the water pipe and then sprayed from the bottom, thereby cooling the surface of the heat sink 3 and washing the surface of the heat sink 3, removing impurities attached to the surface of the heat sink 3, and improving the heat dissipation efficiency of the heat sink 3.

[0061] When the heat dissipation situation does not require air cooling and water cooling to start, and one of the groups needs to disconnect the synchronous operation, the stepper motor 2971 on the side that needs to disconnect the linkage can drive the corresponding pressure block 2972 ​​to move upward, drive the tilting frame 295 to cooperate with the round tilting block 2951 to push the synchronization rod 294 upward, so that the synchronization rod 294 drives the upper ratchet chuck 296 to push up and separate from the lower ratchet chuck 298, so that the upper ratchet chuck 296 is disconnected from the lower ratchet chuck 298, ensuring that the other group of air cooling or water cooling starts normally.

[0062] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A photovoltaic inverter power transformer, comprising: A photovoltaic inverter power box (1), a heat sink (3) and a water collecting tank (2), wherein an inverter power mainboard (11) is detachably mounted inside the photovoltaic inverter power box (1) by means of bolts, and the back of the inverter power mainboard (11) is electrically connected to a power transformer (4) by means of a terminal, and the power transformer (4) penetrates the back of the photovoltaic inverter power box (1); the heat sink (3) is integrally formed on the back of the photovoltaic inverter power box (1) and is used to dissipate heat generated on the back of the inverter power mainboard (11); the water collecting tank (2) is fixedly mounted on the top of the photovoltaic inverter power box (1) and is used to collect rainwater or store cooling water, and a support plate (24) is fixedly mounted at the top center of the water collecting tank (2); and the water collecting tank (2) is characterized in that it also includes: Air temperature sensors (5), wherein three groups of air temperature sensors (5) are provided, and the three groups of air temperature sensors (5) are longitudinally distributed at equal distances on a side of the power transformer (4) away from the photovoltaic inverter power box (1), and are used to detect the air temperature around the power transformer (4); The drive unit comprises a drive support block (25) and a double-headed motor (251), wherein the drive support block (25) is fixedly mounted on a side of the water collecting tank (2) away from the inverter power supply mainboard (11), and the double-headed motor (251) is fixedly mounted on the drive support block (25) by means of bolts; The upper and lower linkage air blowing and heat dissipation mechanism is fixedly installed on the back of the photovoltaic inverter power box (1) and is used to cooperate with the drive unit to perform upper and lower driving air blowing and heat dissipation; A synchronous negative pressure spraying and heat dissipation mechanism is arranged on the top of the support plate (24) and is used to link the power of the driving component to perform synchronous negative pressure pumping and spraying to spray and dissipate heat on the heat dissipation fins (3); It also includes a first driving clutch support plate (26) which is fixedly mounted on the rear side of the top of the support plate (24) by means of bolts, a second driving clutch support plate (27) is fixedly mounted on the back of the water collecting tank (2), and a linkage clutch control mechanism is disposed on the back of the first driving clutch support plate (26) and the second driving clutch support plate (27), and the linkage clutch control mechanism is used to independently control the top output end and the bottom output end of the double-headed motor (251) without power failure of the double-headed motor (251); The linkage clutch control mechanism comprises a rotation limiting frame (291), a driving sleeve (292), a spring (293), a synchronization rod (294), a tilting frame (295), a round tilting block (2951), an upper ratchet chuck (296), a clutch control frame (297), a control assembly, a lower ratchet chuck (298) and a connecting plate (299). Two sets of the rotation limiting frames (291) are respectively fixedly mounted on the top of the back side of the first driving clutch support plate (26) and the top of the back side of the second driving clutch support plate (27). The two sets of the clutch The control frame (297) is fixedly mounted on the bottom of the back side of the first driving clutch support plate (26) and the bottom of the back side of the second driving clutch support plate (27), respectively; the driving sleeve (292) is rotatably mounted inside the rotation limiting frame (291); the spring (293) is sleeved on the surface of the synchronization rod (294); the top of the synchronization rod (294) is slidably matched with the internal limit of the driving sleeve (292); the bottom of the synchronization rod (294) is fixedly mounted on the top of the upper ratchet chuck (296); the round warping block (2951) The spring (293) is fixedly mounted on a side of the upper ratchet chuck (296) close to the synchronization rod (294); the tilting frame (295) is slidably mounted between the synchronization rod (294) and the upper ratchet chuck (296); the connecting plate (299) is welded to the top of the back of the photovoltaic inverter power supply box (1); the lower ratchet chuck (298) located on the second driving clutch support plate (27) is rotatably mounted inside the connecting plate (299) and is engaged with the upper ratchet chuck (296); the bottom of the spring (293) is connected to the surface of the synchronization rod (294) The top of the spring (293) contacts the bottom of the driving sleeve (292); the control component is arranged at the bottom of the rotation limiting frame (291) and is used to control the tilting frame (295) to tilt the synchronization rod (294) up and down; the top of the driving sleeve (292) mounted on the second driving clutch support plate (27) is fixedly mounted to the bottom output end of the double-headed motor (251); the bottom of the lower ratchet chuck (298) mounted on the first driving clutch support plate (26) is fixedly mounted to the top output end of the double-headed motor (251).

2. A photovoltaic inverter power transformer according to claim 1, characterized in that: A rain-sensing dust-proof component for preventing external dust from entering the water collecting box (2) is fixedly installed on the top of one side of the water collecting box (2), and a water pipe joint is connected to the top of one side of the water collecting box (2); The rain sensing and dustproof assembly comprises a rain sensor (241), a double-headed electric push rod (22), a sealing cover (21) and a connecting rod (23); the rain sensor (241) is fixedly mounted on the front side of the top of the support plate (24); the double-headed electric push rod (22) is fixedly mounted on the top of the water collecting tank (2) away from the heat dissipation fin (3); the connecting rod (23) is fixedly mounted on the two output ends of the double-headed electric push rod (22); the sealing cover (21) and the connecting rod (23) are fixedly mounted and slidably matched with the top of the water collecting tank (2).

3. A photovoltaic inverter power transformer according to claim 1, characterized in that: The upper and lower linkage air blowing and heat dissipation mechanism comprises a screw rod (281), a synchronous frame (282), a limit rod frame (283), a heat dissipation fan (284) and a stabilizing plate (285); the top of the screw rod (281) is fixedly connected to the bottom of a lower ratchet chuck (298) rotating inside a connecting plate (299); the synchronous frame (282) is threadedly connected to the surface of the screw rod (281); the limit rod frame (283) is fixedly mounted on both sides of the back of the photovoltaic inverter power box (1) by bolts; the two ends of the synchronous frame (282) are slidably matched with the surface of the limit rod frame (283); the heat dissipation fan (284) is fixedly mounted on both sides of the synchronous frame (282); the stabilizing plate (285) is welded to the bottom of the back of the photovoltaic inverter power box (1) and is rotatably matched with the bottom of the screw rod (281).

4. The photovoltaic inverter power transformer according to claim 1, characterized in that: The synchronous negative pressure spray heat dissipation mechanism comprises a stabilizing block (261), a rotating rod (262), a driving gear (263), a gear plate one (264), a linkage gear (265), a gear plate two (266), a gear plate three (267), a gear plate four (268), a spray pipe (2499) and a reciprocating negative pressure pumping assembly, wherein the stabilizing block (261) is fixedly mounted on the front of a first driving clutch support plate (26), the rotating rod (262) is rotatably mounted inside the stabilizing block (261), the gear plate one (264) is key-connected to the top of the rotating rod (262), the linkage gear (265) is fixedly mounted to the bottom of the rotating rod (262), and the driving gear (263) is fixedly mounted on a driving sleeve (266) located on the first driving clutch support plate (26). 292) surface, the gear plate two (266) is rotatably mounted on the top of the support plate (24) through the top shaft of the support plate (24) and meshes with the linkage gear (265), the gear plate three (267) is rotatably mounted on the top of the support plate (24) through the top shaft of the support plate (24) and is located on the front side of the gear plate two (266), the gear plate three (267) is meshed with the gear plate two (266), the gear plate four (268) is rotatably mounted on the top of the support plate (24) and meshes with the gear plate three (267), the spray pipe (2499) is arranged on the rear side of the water collecting tank (2), and the reciprocating negative pressure pumping assembly is arranged at the bottom of the inner wall of the water collecting tank (2) for coupling the rotation of the gear plate four (268) to perform negative pressure pumping and spraying.

5. The photovoltaic inverter power transformer according to claim 1, characterized in that: The control assembly comprises a stepper motor (2971), a pressure block (2972), a second screw rod (2973), a seesaw (2974) and a prying shaft (2975); the stepper motor (2971) is fixedly mounted on a side of a clutch control frame (297) away from a water collecting tank (2); the pressure block (2972) is threadedly connected to the surface of the second screw rod (2973); the second screw rod (2973) is fixedly mounted on the output end of the stepper motor (2971); the seesaw (2974) is movably mounted on the surface of the prying shaft (2975); both ends of the prying shaft (2975) are fixedly mounted on the clutch control frame (297); and the seesaw (2974) is fixedly mounted on the prying frame (295).

6. A photovoltaic inverter power transformer according to claim 4, characterized in that: The reciprocating negative pressure pumping assembly comprises a linkage rod (242), a stabilizing frame (243), a driving disk (244), a mounting base plate (245), a sliding rod (246), a driving frame (247), a synchronization plate (248), a negative pressure unit and a synchronization piston rod (249). The top of the linkage rod (242) passes through the support plate (24) and is fixedly mounted on the gear plate four (268). The bottom of the linkage rod (242) is rotatably matched with the stabilizing frame (243). The stabilizing frame (243) is fixedly mounted on the top of the mounting base plate (245) near the linkage rod (242). The bottom of the mounting base plate (245) is connected to the linkage rod (242) by a screw thread. The bolts are fixedly installed at the bottom of the inner wall of the water collecting tank (2), the driving disk (244) is fixedly installed at the bottom of the linkage rod (242), the sliding rod (246) is fixedly installed at the bottom of the driving disk (244) on the side away from the stabilizing frame (243), the driving frame (247) is slidably sleeved on the surface of the sliding rod (246), the synchronous plate (248) is fixedly installed with the driving frame (247), the synchronous piston rod (249) is plugged and installed on the top of the synchronous plate (248), and the negative pressure unit is arranged on the top of the mounting base plate (245), and the negative pressure unit is used to convert the reciprocating structure into negative pressure power to perform water pumping operation.

7. A photovoltaic inverter power transformer according to claim 6, characterized in that: The negative pressure unit comprises a piston cylinder (2491), a clamp (2492), a one-way water inlet valve (2493), a piston block (2494), a one-way water outlet valve (2495) and a filter ball (2497); the piston cylinder (2491) is fixedly mounted on the top of the mounting base plate (245) via the clamp (2492); the one-way water inlet valve (2493) is connected to a side of the piston cylinder (2491) away from the synchronous piston rod (249); the one-way water outlet valve (2495) is connected to a side of the piston cylinder (2491) away from the one-way water inlet valve (2493); and the one-way water inlet valve (2495) is connected to a side of the piston cylinder (2491) away from the one-way water outlet valve (2495). 93) is connected to the spray pipe (2499) through a water pipe penetrating the water collecting tank (2), the piston block (2494) is fixedly installed with the end of the synchronous piston rod (249) away from the synchronous plate (248), the clamp (2492) is fixedly installed on the top of the synchronous plate (248) and located on the surface of the piston cylinder (2491), the surface of the piston block (2494) is sealed with the inner wall of the piston cylinder (2491) through a sealing ring, the one-way water inlet valve (2493) is connected to the filter ball (2497) through a water pipe, and the filter ball (2497) is suspended at the bottom of the inner wall of the water collecting tank (2) by its own weight.

8. The photovoltaic inverter power transformer according to claim 7, characterized in that: Limiting frames are rotatably mounted on both sides of the surface of the spray pipe (2499), and the limiting frames are welded and fixed to the surface of the water collecting tank (2). The bottom of the spray pipe (2499) is connected to a spray head.

Images