A seamless switching AC output circuit and device

Abstract

The present application relates to a seamless switching AC output circuit and device, belonging to the field of AC output devices, wherein a seamless switching AC output circuit includes a three-phase four-wire power input terminal, the three-phase four-wire power input terminal includes phase lines L1, L2, L3 and a neutral line N, the L1 is connected to the AC / DC1 module, the L2 is connected to the AC / DC2 module, the L3 is connected to the AC / DC3 module, the output ends of the AC / DC1 module, the AC / DC2 module and the AC / DC3 module are all connected to the DC bus, and the output end of the neutral line N is divided into three wires and connected to the AC / DC1 module, the AC / DC2 module and the AC / DC3 module respectively. When a module in the AC output circuit of the present application fails, the other modules can continue to work, and are connected to the corresponding filter through a bidirectional electronic switch, so that the output waveform is closer to a sine wave, thereby improving the quality of electric energy.

Description

Technical Field

[0001] The invention relates to a seamless switching AC output circuit and device, belonging to the field of AC output devices. Background Art

[0002] AC output devices are a vital component of the power system, which converts DC into AC to meet the needs of equipment operation. AC output devices are used to ensure the stability of power transmission, distribution and power systems, ensure that power is delivered to the user end in an appropriate form and quality, and support the normal operation of various electrical equipment. Existing AC output devices still have some defects.

[0003] For example, the invention patent with publication number CN113228482B discloses an electric power conversion device, which comprises: a semiconductor component for electric power conversion; a heat transfer member, on which the semiconductor component is fastened in a manner that a heat dissipation surface formed on at least one surface of the semiconductor component is thermally connected to the heat transfer member; and a housing, which has a storage space, the storage space accommodating the semiconductor component and the heat transfer member, the housing having a heat dissipation wall portion on the outside of the storage space facing the refrigerant, and a fitting portion that is fitted with the heat transfer member is formed on the inside of the storage space of the heat dissipation wall portion, the contact area of ​​the fitting portion with the heat transfer member is larger than the area of ​​the heat dissipation surface of the semiconductor component, and the occupied area of ​​the fitting portion when viewed from above is smaller than the area of ​​one surface of the semiconductor component on which the heat dissipation surface is formed. The above-mentioned device can fully ensure the heat dissipation capacity of the power semiconductor module while configuring the power semiconductor module in a vertical manner. However, when in use, it cannot automatically open the heat dissipation holes on the top for air cooling after the temperature inside the device reaches a certain level. The existing AC output device does not have a button anti-accidental touch function, and the existing AC output circuit cannot continue to work using other modules when one of the modules fails.

[0004] Therefore, we have made improvements to this and proposed a seamless switching AC output circuit and device. Summary of the invention

[0005] (I) The technical problem to be solved by the present invention is that the existing AC output device cannot automatically open the heat dissipation holes on the top to perform air cooling and heat dissipation when the temperature inside the device reaches a certain level.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned invention object, the present invention provides a seamless switching AC output circuit, including a three-phase four-wire power input end, the three-phase four-wire power input end includes phase lines L1, L2, L3 and a neutral line N, the L1 is connected to the AC / DC1 module, the L2 is connected to the AC / DC2 module, the L3 is connected to the AC / DC3 module, the output ends of the AC / DC1 module, the AC / DC2 module and the AC / DC3 module are all connected to the DC bus, and the output end of the neutral line N is divided into three wires respectively connected to the AC / DC1 module, the AC / DC2 module and the AC / DC3 module. The AC / DC3 module is connected, the DC / AC1 module and the DC / AC2 module are connected in parallel on the DC bus, the output end of the DC / AC1 module is connected to the bidirectional electronic switch S1, the output end of the DC / AC2 module is connected to the bidirectional electronic switch S2, the output end of the bidirectional electronic switch S1 is connected to the filter LCL1, the output end of the bidirectional electronic switch S2 is connected to the filter LCL2, the filter LCL1 leads to four output lines A1, B1, C1, N1, and the filter LCL2 leads to four output lines A2, B2, C2, N2.

[0008] A seamless switching AC output device, the seamless switching AC output device comprising a seamless switching AC output circuit;

[0009] The invention also includes a shell, a top cover is bonded to the top of the shell, the bidirectional electronic switch S1, the bidirectional electronic switch S2, the filter LCL1 and the filter LCL2 are all installed in the shell, the shell is provided with first through holes for gas circulation around the four sides, a switch button is installed on the top cover, and second through holes are evenly opened on the top of the top cover, a baffle for stratifying the internal space of the shell is installed in the shell, the bidirectional electronic switch S1, the bidirectional electronic switch S2, the filter LCL1 and the filter LCL2 are all located below the baffle, a first fixing plate is installed in the top cover, and the first fixing plate is fixedly connected with the second through holes. A connecting block, a second connecting plate is fixedly connected to the first connecting block, a first slide plate is slidably installed on the second connecting plate, a traction component for opening or closing the second through hole is installed on the first slide plate, a second connecting block is installed on the traction component, a second traction steel rope is connected to the second connecting block, the second traction steel rope is connected to the power supply through the second guide wheel, the second guide wheel and the top cover are rotatably connected, the power supply and the top cover are slidably connected, a second elastic band is connected between the power supply and the top cover, a first conductive plate is installed on the power supply, and a second conductive plate is arranged below the first conductive plate.

[0010] Wherein, an outer frame is installed on the shell, a fixing ring is fixedly connected to the outer frame, a connecting shaft is rotatably connected inside the fixing ring, and an adjustment component is installed between the switch button and the fixing ring.

[0011] Among them, a third fixing plate is fixedly arranged inside the top cover, a cooling fan is installed on the third fixing plate, and the cooling fan is connected to the second conductive plate; a partition is fixedly connected to the first slide plate, a second opening is opened on the partition, a third connecting plate is connected to the partition, a first elastic band is connected between the third connecting plate and the top cover, a support plate is fixedly connected inside the top cover, the upper surface of the support plate and the lower surface of the third connecting plate are in contact with each other, and the first slide plate, the partition and the third connecting plate are fixedly connected to form an integral structure.

[0012] The baffle is located above the first through hole, and a third through hole and a first opening are formed on the baffle. The position of the third through hole corresponds to that of the cooling fan, and the position of the first opening corresponds to that of the third fixing plate.

[0013] In which, the adjusting assembly includes a top block fixedly connected to the connecting shaft, a first damping block and a second damping block are fixedly connected to the fixing ring, a stud is installed with an internal thread of the connecting shaft, a swivel is rotatably installed on the stud, a first connecting plate is fixedly connected to the swivel, an extrusion block is fixedly connected to the first connecting plate, a connecting block is fixedly arranged on the stud, the first damping block and the second damping block are both concave on one side close to the connecting shaft, the top block, the first damping block and the second damping block are all made of rubber, a chamfer is arranged on the extrusion block, a gap is arranged between the top block and the connecting shaft for the extrusion block to move, and the extrusion block is suitable for pushing the top block outward when the stud is screwed into the connecting shaft.

[0014] Wherein, a moving groove is provided on the first slide plate, a convex block is fixedly connected to the top cover, and the first slide plate forms a sliding structure with the top cover through the moving groove and the convex block.

[0015] Among them, the traction assembly includes a first traction steel rope fixedly connected to the first slide plate, a fixed shaft is fixedly arranged in the top cover, the outer side of the fixed shaft is rotatably connected to the first guide wheel, a second fixed plate is fixedly arranged in the top cover, a guide rail is fixedly connected to the second fixed plate, and a plurality of sliders are slidably installed in the guide rail, the first traction steel rope is connected to the rightmost slider through the guidance of the first guide wheel, a nickel-titanium alloy spring is fixedly connected between two adjacent sliders, the leftmost nickel-titanium alloy spring is fixedly connected to the top cover, a first connecting plate is fixedly arranged on the top of the rightmost slider, a second connecting plate is fixedly arranged on the first connecting plate, and the second connecting plate and the second connecting block are fixedly connected.

[0016] Among them, the first traction steel ropes are evenly spaced on the first guide wheel, the outer wall of the slider fits with the inner wall of the guide rail, there is a gap between two adjacent guide rails, and the nickel-titanium alloy springs on the guide rails are suitable for synchronous stretching when the first traction steel rope is pulled.

[0017] The heat dissipation fans are distributed at equal intervals on the second conductive plate, and the diameter of the heat dissipation fans is equal to the aperture of the third through hole.

[0018] (III) Beneficial effects

[0019] The present invention provides a seamless switching AC output circuit and device, which has the following beneficial effects:

[0020] 1. Through the traction assembly, the partition and the second opening, when the temperature in the device rises, the nickel-titanium alloy spring between the two adjacent sliders automatically contracts, thereby pulling the sliders at all locations on the device to the left as a whole, and then pulling the first traction steel rope. The first traction steel rope pulls the first slide plate to slide to the right under the guidance of the first guide wheel. When the first slide plate slides to the far right, the second through hole on the top cover coincides with the second opening on the partition. At this time, the device can dissipate heat through the second through hole, which improves the heat dissipation effect compared to the heat dissipation only through the first through holes around the bottom of the device. At the same time, when the slider on the far right of the device moves to the left, it will drive the first connecting plate and the second connecting plate to move to the left, thereby pulling the second traction steel rope through the second connecting block on the second connecting plate, so that the power supply is pulled downward. At this time, the first conductive plate on the power supply contacts the second conductive plate extending upward from the heat dissipation fan. The heat dissipation fans at various positions are automatically started after the power is turned on, and the heat in the shell is discharged upward, so that the device can automatically dissipate heat when the heat in the shell is too high, solving the problem that the existing AC output device cannot automatically open the heat dissipation holes on the top for air cooling and heat dissipation after the internal temperature reaches a certain level.

[0021] 2. By setting the first traction steel rope, elastic band, second fixed plate and guide rail, since there is a gap between the second fixed plate and the guide rail, the heat below the device can be transferred from the bottom to the top. As the temperature gradually rises, the device automatically starts the fan to dissipate heat. When the temperature inside the device drops to a certain level or is turned off for cooling, the nickel-titanium alloy spring will automatically reset, so that the fan will automatically shut down, making the device more durable. The device can not only automatically perform air cooling when the temperature is too high, but also automatically stop dissipating heat after the device is cooled. The partition is automatically reset by the first traction steel rope and elastic band. At this time, the second opening on the partition and the second through hole are staggered, so that the second through hole is stopped from being used, thereby achieving a dustproof effect.

[0022] 3. An air duct is formed in the device by setting the baffle, the third through hole and the first opening. When the temperature in the device is normal, heat is dissipated only through the first through hole. When the temperature in the device is too high, the fan is started and air is taken in through the first through hole, and air is discharged through the second through hole on the top of the device, so that the device can dissipate heat efficiently until the temperature in the device returns to normal or the device stops being used, and then heat is dissipated through the first through hole again. Not only can automatic heat dissipation be achieved in case of overheating, but also heat can be discharged from the space around the first through hole outside the device, thereby enhancing the heat dissipation performance of the device.

[0023] 4. Through the setting of the adjustment component, outer frame, fixing ring and connecting shaft, by toggling the connecting block, the stud in the connecting shaft is screwed in or out. After the stud is screwed into the inside of the connecting shaft, it will drive the rotating ring to move toward the side close to the connecting shaft, so that the extrusion block pushes the top block, thereby changing the degree of compression between the top block and the first damping block or the second damping block, thereby changing the resistance value of the device when switching the switch button. When the device needs to be kept open for a long time, the resistance of the switching switch can be increased after the switch button is turned on, thereby avoiding accidental touch, solving the problem that the existing AC output device does not have the button anti-accidental touch function.

[0024] 5. By setting up three independent AC / DC modules connected to the three-phase power line and the neutral line respectively, the stable conversion of the input AC power is ensured. When one module fails, the other modules can continue to work, ensuring uninterrupted power supply. The two-way electronic switch is connected to the corresponding filter to achieve flexible branch switching. The filter makes the output waveform closer to the sine wave, improves the power quality, reduces the electromagnetic interference to the load and other equipment, and prolongs the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0027] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0028] Figure 3 This is a schematic diagram of the split structure of the housing and the top cover of the present invention;

[0029] Figure 4 for Figure 3 A magnified schematic diagram of the structure at center A;

[0030] Figure 5 It is a schematic diagram of the connection structure of the connecting shaft and the stud of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the top cover of the present invention;

[0032] Figure 7 for Figure 6 A magnified schematic diagram of the structure at B in the middle;

[0033] Figure 8 for Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0034] Fig. 9 for Figure 6 A magnified schematic diagram of the structure at D in the middle;

[0035] Fig.10 for Figure 6 A magnified schematic diagram of the structure at E in the middle;

[0036] Fig.11 It is a schematic diagram of the connection structure between the first slide plate and the partition plate of the present invention;

[0037] Fig.12 This is a schematic diagram of the connection structure between the first guide wheel and the fixed shaft of the present invention;

[0038] Fig.13 This is a circuit diagram of the present invention.

[0039] Figure numerals: 1, shell; 2, top cover; 3, first through hole; 4, switch button; 5, second through hole; 6, baffle; 7, outer frame; 8, fixing ring; 9, connecting shaft; 10, adjustment assembly; 1001, top block; 1002, first damping block; 1003, second damping block; 1004, stud; 1005, swivel; 1006, first connecting plate; 1007, extrusion block; 1008, connecting block; 11, first fixing plate; 12, first connecting block; 13, second connecting plate; 14, first slide plate; 15, moving groove; 16, protrusion; 17, traction assembly; 1701, first traction steel rope; 17 02, first guide wheel; 1703, fixed shaft; 1704, slider; 1705, nickel-titanium alloy spring; 1706, guide rail; 1707, second fixed plate; 1708, first connecting plate; 1709, second connecting plate; 18, second connecting block; 19, second traction rope; 20, second guide wheel; 21, power supply; 22, first conductive plate; 23, second conductive plate; 24, third fixed plate; 25, cooling fan; 26, third through hole; 27, first opening; 28, partition; 29, second opening; 30, third connecting plate; 31, first elastic band; 32, support plate; 33, second elastic band. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples of the specification. The following examples are only used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0041] Embodiment 1:

[0042] like Fig.13 As shown, this embodiment proposes a seamless switching AC output circuit, including a three-phase four-wire power input end, the three-phase four-wire power input end includes phase lines L1, L2, L3 and a neutral line N, L1 is connected to the AC / DC1 module, L2 is connected to the AC / DC2 module, L3 is connected to the AC / DC3 module, the output ends of the AC / DC1 module, the AC / DC2 module and the AC / DC3 module are all connected to the DC bus, the output end of the neutral line N is divided into three wires and respectively connected to the AC / DC1 module, the AC / DC2 module and the AC / DC3 module, the DC / AC1 module and the DC / AC2 module are connected in parallel on the DC bus, the output end of the DC / AC1 module is connected to the bidirectional electronic switch S1, the output end of the DC / AC2 module is connected to the bidirectional electronic switch S2, the output end of the bidirectional electronic switch S1 is connected to the filter LCL1, the output end of the bidirectional electronic switch S2 is connected to the filter LCL2, the filter LCL1 leads to four output lines A1, B1, C1, N1, and the filter LCL2 leads to four output lines A2, B2, C2, N2.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, a seamless switching AC output device, the seamless switching AC output device includes a seamless switching AC output circuit;

[0044] The device also includes a shell 1, a top cover 2 is bonded to the top of the shell 1, the bidirectional electronic switch S1, the bidirectional electronic switch S2, the filter LCL1 and the filter LCL2 are all installed in the shell, the shell 1 is provided with first through holes 3 for gas circulation around, a switch button 4 is installed on the top cover 2, and second through holes 5 are evenly opened on the top of the top cover 2. When the temperature in the device is normal, heat is dissipated through the second through holes 5 to keep the shell 1 ventilated, a baffle 6 is installed in the shell 1, the bidirectional electronic switch S1, the bidirectional electronic switch S2, the filter LCL1 and the filter LCL2 are all located below the baffle 6, and the baffle 6 is used to separate the internal space of the shell 1 to ensure that the bidirectional electronic switch S1, the bidirectional electronic switch S2, the filter LCL1 and the filter LCL2 in the circuit can be fully cooled, so as to form a closed air duct later to improve the heat dissipation effect. An outer frame 7 is installed on the outer frame 1, and a fixing ring 8 is fixedly connected to the outer frame 7. A connecting shaft 9 is rotatably connected in the fixing ring 8. An adjusting component 10 is installed between the switch button 4 and the fixing ring 8. The adjusting component 10 can change the resistance of the connecting shaft 9 to rotation in the fixing ring 8, thereby changing the resistance size of the device when switching the switch button 4. By adjusting the resistance to the maximum, the switch button 4 can always maintain an open or closed state, avoiding accidental touch during subsequent movement, thereby ensuring the safety of the device when in use. A first fixed plate 11 is installed in the top cover 2, a first connecting block 12 is fixedly connected to the first fixed plate 11, a second connecting plate 13 is fixedly connected to the first connecting block 12, a first slide plate 14 is slidably installed on the second connecting plate 13, a traction assembly 17 for opening or closing the second through hole 5 is installed on the first slide plate 14, a second connecting block 18 is installed on the traction assembly 17, a second traction steel rope 19 is connected to the second connecting block 18, the second traction steel rope 19 is connected to the power supply 21 through the second guide wheel 20, the second guide wheel 20 is connected to the top cover 2 in a rotating manner, the power supply 21 is connected to the top cover 2 in a sliding manner, a second elastic band 33 is connected between the power supply 21 and the top cover 2, a first conductive plate 22 is installed on the power supply 21, and a second conductive plate 23 is arranged below the first conductive plate 22;

[0045] A third fixing plate 24 is fixedly provided in the top cover 2, and a cooling fan 25 is installed on the third fixing plate 24. When the temperature in the device is too high, the traction component 17 will pull the power supply 21 downward through the second traction steel rope 19 when heated, and the second elastic band 33 will be stretched, and the first conductive plate 22 will contact the second conductive plate 23, thereby automatically opening the cooling fan 25 in the device, and the cooling fan 25 is connected to the second conductive plate 23. A partition 28 is fixedly connected to the first slide plate 14, and a second opening 29 is provided on the partition 28. A third connecting plate 30 is connected to the partition 28, and a first elastic band 31 is connected between the third connecting plate 30 and the top cover 2. After the cooling fan 25 is opened, air is exhausted upward. At the same time, the first slide plate 14 will be pulled to the right, so that the partition 28 on the device is in a Figure 8 In the state, the second opening 29 is connected to the second through hole 5, and can be cooled by exhausting air upward from all sides of the bottom of the device. The new heat dissipation channel can not only realize the heat dissipation function inside the device, but also can dissipate heat to the space around the first through hole 3 outside the device.

[0046] Embodiment 2:

[0047] The solution in Example 1 is further introduced below in combination with a specific working method, as described below:

[0048] like Fig.10 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a support plate 32 is fixedly connected inside the top cover 2, the upper surface of the support plate 32 and the lower surface of the third connecting plate 30 are in contact with each other, the first slide plate 14, the partition plate 28 and the third connecting plate 30 are fixedly connected as an integral structure, when the first slide plate 14 is pulled, the first slide plate 14, the partition plate 28 and the third connecting plate 30 move as a whole, and the support plate 32 enables the third connecting plate 30 to move straight, thereby ensuring the stability of the device when working.

[0049] like Figure 6 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the baffle plate 6 is located above the first through hole 3, so that the space in the device is divided into two layers, a third through hole 26 and a first opening 27 are provided on the baffle plate 6, and the position of the third through hole 26 corresponds to the position of the cooling fan 25, and the position of the first opening 27 corresponds to the position of the third fixing plate 24. When the cooling fan 25 is working, air can be exhausted upward through the third through hole 26, so that the heat in the device can be discharged upward, thereby ensuring the heat dissipation effect of the device.

[0050] like Figure 4 and Figure 5As shown, as a preferred embodiment, on the basis of the above method, further, the adjustment assembly 10 includes a top block 1001 fixedly connected to the connecting shaft 9, a first damping block 1002 and a second damping block 1003 are fixedly connected to the fixing ring 8, a stud 1004 is internally threadedly installed on the connecting shaft 9, a swivel 1005 is rotatably installed on the stud 1004, a first connecting plate 1006 is fixedly connected to the swivel 1005, an extrusion block 1007 is fixedly connected to the first connecting plate 1006, and a stud 1004 is fixedly provided with a screw rod 1006. A connecting block 1008 is provided. When the connecting block 1008 is turned, the stud 1004 can be screwed in or out of the connecting shaft 9, and the swivel 1005 moves toward or away from the connecting shaft 9. The squeezing block 1007 squeezes the top block 1001. Depending on the degree of squeezing, the resistance between the top block 1001 and the first damping block 1002 and the second damping block 1003 is different, so that the resistance of the device changes when the switch is turned on or off, and the accidental touch can be avoided by increasing the switching resistance.

[0051] like Figure 5 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the first damping block 1002 and the second damping block 1003 are both concave on one side close to the connecting shaft 9, and the top block 1001, the first damping block 1002 and the second damping block 1003 are all made of rubber material. The rubber material of the top block 1001 increases the resistance between the top block 1001 and the first damping block 1002 or the second damping block 1003 when the top block 1001 is squeezed, and the concave structure of the first damping block 1002 and the second damping block 1003 enables the top block 1001 to be stably docked.

[0052] like Figure 5 As shown, as a preferred embodiment, based on the above method, further, a chamfer is provided on the extrusion block 1007, and a gap is provided between the top block 1001 and the connecting shaft 9 for the extrusion block 1007 to move. Figure 4 and Figure 5 It can be seen that after the extrusion block 1007 moves into the gap, it can tighten the top block 1001 outward. The extrusion block 1007 is suitable for pushing the top block 1001 outward when the stud 1004 is screwed into the connecting shaft 9. When the stud 1004 is screwed outward, the pressure of the top block 1001 on the damping block is reduced, so that the device can switch the switch to an open or closed state with low resistance.

[0053] like Figure 7As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a movable groove 15 is opened on the first slide plate 14, and a protrusion 16 is fixedly connected to the top cover 2. The first slide plate 14 forms a sliding structure with the top cover 2 through the movable groove 15 and the protrusion 16. The movable groove 15 and the protrusion 16 on the device can limit the moving distance of the first slide plate 14, which can not only make the first slide plate 14 slide stably, but also ensure that the ventilation structure on the top cover 2 of the device can be stably opened or closed.

[0054] like Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the traction assembly 17 includes a first traction steel rope 1701 fixedly connected to the first slide plate 14, a fixed shaft 1703 is fixedly arranged in the top cover 2, and the outer side of the fixed shaft 1703 is rotatably connected to the first guide wheel 1702, a second fixed plate 1707 is fixedly arranged in the top cover 2, a guide rail 1706 is fixedly connected to the second fixed plate 1707, and a plurality of sliders 1704 are slidably installed in the guide rail 1706, the first traction steel rope 1701 is guided by the first guide wheel 1702 and connected to the rightmost slider 1704, and the space between two adjacent sliders 1704 is 1704. A nickel-titanium alloy spring 1705 is fixedly connected, the nickel-titanium alloy spring 1705 on the far left is fixedly connected to the top cover 2, a first connecting plate 1708 is fixedly arranged on the top of the rightmost slider 1704, a second connecting plate 1709 is fixedly arranged on the first connecting plate 1708, and the second connecting plate 1709 is fixedly connected to the second connecting block 18. When the temperature in the device is too high, the nickel-titanium alloy spring 1705 will shrink, thereby pulling the sliders 1704 at various positions to slide to the left. When the slider 1704 moves to the left, it will pull the first slide plate 14 to move to the left through the first traction steel rope 1701, so that the first slide plate 14 moves to Figure 7 In this state, the ventilation structure on the top of the device can be opened. At the same time, the slider 1704 will pull the second connecting block 18 through the first connecting plate 1708 and the second connecting plate 1709 to facilitate the subsequent switching of the heat dissipation channel.

[0055] like Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12As shown, as a preferred embodiment, on the basis of the above method, further, the first traction steel rope 1701 is evenly spaced on the first guide wheel 1702, the outer wall of the slider 1704 and the inner wall of the guide rail 1706 fit together to ensure that the slider 1704 can slide smoothly, and there is a gap between two adjacent guide rails 1706, so that when the device dissipates heat through air cooling, the heat can be discharged from bottom to top.

[0056] like Figure 6 As shown, as a preferred embodiment, on the basis of the above method, further, the heat dissipation fans 25 are evenly spaced on the second conductive plate 23, thereby enhancing the heat dissipation performance of the device. The diameter of the heat dissipation fans 25 is equal to the aperture of the third through hole 26, so that the space in the device is divided into two layers, upper and lower. When the heat is accumulated enough, the heat can be discharged from bottom to top.

[0057] Embodiment 3:

[0058] The schemes in Example 1 and Example 2 are further introduced below in combination with specific working methods, as described below for details:

[0059] Specifically, when the seamless switching AC output circuit and device are used: Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, the housing 1 is used to support the device as a whole, and the first connecting block 12 is used to connect the first fixing plate 11 and the second connecting plate 13, so that the first slide plate 14 is stably supported. When the temperature in the device is normal, heat is dissipated through the first through hole 3. At this time, the second through hole 5 on the top cover 2 remains closed. After the device is started, as the temperature in the housing 1 increases, the heat will be transferred to the multiple groups of nickel-titanium alloy springs 1705 distributed evenly on the traction component 17. The nickel-titanium alloy springs 1705 will shrink due to heat, thereby pulling the sliders 1704 at various positions to slide to the left. When the slider 1704 moves to the left, it will pull the first slide plate 14 through the moving groove 15 and the protrusion 16 on the top cover 2 through the first traction steel rope 1701 to move to the left. The third connecting plate 30 slides on the support plate 32, and the first elastic band 31 on the left side of the third connecting plate 30 is stretched, so that the first slide plate 14 moves to Figure 7In the state, the second opening 29 on the partition 28 is connected to the second through hole 5, so that the ventilation structure on the top cover 2 of the device is opened. At the same time, since the rightmost row of sliders 1704 is fixedly connected to form an integral structure through the first connecting plate 1708 and the second connecting plate 1709, when the slider 1704 slides to the left, it will also pull the second connecting block 18 through the first connecting plate 1708 and the second connecting plate 1709, and the second connecting block 18 will pull the second traction steel rope 19. Under the action of the second guide wheel 20, the second traction steel rope 19 will also pull the power supply 21 to slide downward, and the second elastic band 33 will be stretched. Figure 7 As shown, the first conductive plate 22 on the power supply 21 will contact the second conductive plate 23 extending upward from the heat dissipation fan 25, so that the heat dissipation fan 25 can be automatically powered on to discharge the heat below the device to the second through hole 5 on the top cover 2. At this time, the first through hole 3, which was originally a heat dissipation hole, is transformed into an air inlet channel, so that the space around the first through hole 3 around the housing 1 is cooled. The second fixing plate 1707 is used to fix the guide rail 1706, and the gap between adjacent guide rails 1706 can ensure air circulation in the device. The fixing shaft 1703 is used to support the first guide wheel 1702, so that the first guide wheel 1702 can rotate and change the direction of tension transmission of the first traction steel rope 1701.

[0060] like Figure 4 and Figure 5 As shown, when the device is working, the connection block 1008 can be rotated to make the stud 1004 screw in or out of the connection shaft 9, so that the swivel 1005 moves toward the side close to or away from the connection shaft 9, driving the first connection plate 1006 and the extrusion block 1007 to move. The extrusion block 1007 will move to the gap between the top block 1001 and the connection shaft 9, and squeeze the top block 1001 outward. According to the degree of squeezing, the resistance between the top block 1001 and the first damping block 1002 and the second damping block 1003 is also different, so that the resistance of the device when turning on or off the switch button 4 changes, and the accidental touch can be avoided by increasing the resistance of switching. The third through hole 26 and the first opening 27 on the baffle 6 are used to dock with the heat dissipation fan 25 and the third fixing plate 24, respectively, so that the device can form an air duct from bottom to top.

[0061] like Fig.13As shown, the three-phase power lines L1, L2, L3 and the neutral line N constitute a three-phase four-wire input. L1 is connected to the AC / DC1 module, L2 is connected to the AC / DC2 module, and L3 is connected to the AC / DC3 module. The neutral line N is divided into three wires connected to the three AC / DC modules respectively. The three AC / DC modules convert the input three-phase AC power into DC power and output it to the DC bus. The DC bus plays the role of centralized management and distribution of DC power. Two wires are separated from the DC bus. The first wire is connected to the DC / AC1 module. The DC / AC1 module converts DC power into AC power. After the AC power passes through the bidirectional electronic switch S1, it enters the LCL1 filter for filtering, so that its output waveform is closer to a sine wave. The filtered AC power is connected to A1, B1, C1, and N1 from the output end of LCL1, forming a set of three-phase four-wire outputs. The second wire is connected to the DC / AC2 module, which converts DC power into AC power. After passing through the bidirectional electronic switch S2 and the LCL2 filter, another set of three-phase four-wire AC power is output from the output terminals A2, B2, C2, and N2. The function of the bidirectional electronic switches S1 and S2 is to achieve switching between different branches. When rapid waveform changes are required, the bidirectional electronic switch can be used to quickly switch from one branch to another to meet specific power requirements. The LCL1 and LCL2 filters are mainly used in the circuit to filter out high-order harmonics in the output waveform and improve the power quality.

[0062] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A seamless switching AC output device, characterized in that: The seamless switching AC output circuit includes a three-phase four-wire power input terminal, the three-phase four-wire power input terminal includes phase lines L1, L2, L3 and a neutral line N, the L1 is connected to the AC / DC1 module, the L2 is connected to the AC / DC2 module, the L3 is connected to the AC / DC3 module, the output ends of the AC / DC1 module, the AC / DC2 module and the AC / DC3 module are all connected to the DC bus, and the output end of the neutral line N is divided into three wires respectively connected to the AC / DC1 module, the AC / DC2 module and the AC / DC3 module C3 module connection, the DC bus is connected in parallel with a DC / AC1 module and a DC / AC2 module, the output end of the DC / AC1 module is connected to a bidirectional electronic switch S1, the output end of the DC / AC2 module is connected to a bidirectional electronic switch S2, the output end of the bidirectional electronic switch S1 is connected to a filter LCL1, the output end of the bidirectional electronic switch S2 is connected to a filter LCL2, the filter LCL1 leads to four output lines A1, B1, C1, N1, the filter LCL2 leads to four output lines A2, B2, C2, N2; The seamless switching AC output device comprises a housing (1), a top cover (2) is bonded to the top of the housing (1), the bidirectional electronic switch S1, the bidirectional electronic switch S2, the filter LCL1 and the filter LCL2 are all installed in the housing (1), the housing (1) is provided with first through holes (3) for gas circulation around the periphery, a switch button (4) is installed on the top cover (2), the top of the top cover (2) is evenly provided with second through holes (5), a baffle (6) for dividing the internal space of the housing (1) into layers is installed in the housing (1), the bidirectional electronic switch S1, the bidirectional electronic switch S2, the filter LCL1 and the filter LCL2 are all located below the baffle (6), a first fixing plate (11) is installed in the top cover (2), a first connecting block (12) is fixedly connected to the first fixing plate (11), and the first connecting block (12) 12) is fixedly connected to a second connecting plate (13), a first slide plate (14) is slidably mounted on the second connecting plate (13), a traction assembly (17) for opening or closing the second through hole (5) is mounted on the first slide plate (14), a second connecting block (18) is mounted on the traction assembly (17), a second connecting block (18) is connected to a second traction steel rope (19), the second traction steel rope (19) is connected to a power source (21) through a second guide wheel (20), the second guide wheel (20) is rotatably connected to the top cover (2), the power source (21) is slidably connected to the top cover (2), a second elastic band (33) is connected between the power source (21) and the top cover (2), a first conductive plate (22) is mounted on the power source (21), and a second conductive plate (23) is arranged below the first conductive plate (22); The traction assembly (17) comprises a first traction steel rope (1701) fixedly connected to the first slide plate (14); a fixed shaft (1703) is fixedly arranged in the top cover (2); a first guide wheel (1702) is rotatably connected to the outer side of the fixed shaft (1703); a second fixed plate (1707) is fixedly arranged in the top cover (2); a guide rail (1706) is fixedly connected to the second fixed plate (1707); a plurality of sliders (1704) are slidably installed in the guide rail (1706); the first traction steel rope (1701) is fixedly arranged in the top cover (2); 1) is guided by a first guide wheel (1702) and connected to the rightmost slider (1704); a nickel-titanium alloy spring (1705) is fixedly connected between two adjacent sliders (1704); the leftmost nickel-titanium alloy spring (1705) is fixedly connected to the top cover (2); a first connecting plate (1708) is fixedly provided on the top of the rightmost slider (1704); a second connecting plate (1709) is fixedly provided on the first connecting plate (1708); and the second connecting plate (1709) is fixedly connected to the second connecting block (18).

2. A seamless switching AC output device according to claim 1, characterized in that: An outer frame (7) is mounted on the housing (1), a fixing ring (8) is fixedly connected to the outer frame (7), a connecting shaft (9) is rotatably connected inside the fixing ring (8), and an adjustment component (10) is mounted between the switch button (4) and the fixing ring (8).

3. A seamless switching AC output device according to claim 1, characterized in that: A third fixing plate (24) is fixedly arranged inside the top cover (2), a heat dissipation fan (25) is installed on the third fixing plate (24), and the heat dissipation fan (25) is connected to the second conductive plate (23); a partition plate (28) is fixedly connected to the first slide plate (14), a second opening (29) is opened on the partition plate (28), a third connecting plate (30) is connected to the partition plate (28), a first elastic band (31) is connected between the third connecting plate (30) and the top cover (2); a support plate (32) is fixedly connected inside the top cover (2), an upper surface of the support plate (32) and a lower surface of the third connecting plate (30) are in contact with each other, and the first slide plate (14), the partition plate (28) and the third connecting plate (30) are fixedly connected to form an integral structure.

4. A seamless switching AC output device according to claim 2, characterized in that: The baffle plate (6) is located above the first through hole (3), and a third through hole (26) and a first opening (27) are provided on the baffle plate (6); the position of the third through hole (26) corresponds to the position of the heat dissipation fan (25), and the position of the first opening (27) corresponds to the position of the third fixing plate (24).

5. A seamless switching AC output device according to claim 2, characterized in that: The adjustment assembly (10) comprises a top block (1001) fixedly connected to the connecting shaft (9); a first damping block (1002) and a second damping block (1003) are fixedly connected to the fixing ring (8); a stud (1004) is internally threadedly mounted on the connecting shaft (9); a swivel (1005) is rotatably mounted on the stud (1004); a first connecting plate (1006) is fixedly connected to the swivel (1005); an extrusion block (1007) is fixedly connected to the first connecting plate (1006); a connecting rod (1008) is fixedly arranged on the stud (1004); Block (1008), the first damping block (1002) and the second damping block (1003) are both concave on one side close to the connecting shaft (9), the top block (1001), the first damping block (1002) and the second damping block (1003) are all made of rubber, the extrusion block (1007) is provided with an oblique cut surface, a gap is provided between the top block (1001) and the connecting shaft (9) for the extrusion block (1007) to move, and the extrusion block (1007) is suitable for pushing the top block (1001) outward when the stud (1004) is screwed into the connecting shaft (9).

6. A seamless switching AC output device according to claim 1, characterized in that: The first slide plate (14) is provided with a movable groove (15), the top cover (2) is fixedly connected with a protrusion (16), and the first slide plate (14) forms a sliding structure with the top cover (2) through the movable groove (15) and the protrusion (16).

7. A seamless switching AC output device according to claim 1, characterized in that: The first traction steel ropes (1701) are evenly spaced on the first guide wheel (1702), the outer wall of the slider (1704) and the inner wall of the guide rail (1706) fit each other, there is a gap between two adjacent guide rails (1706), and each nickel-titanium alloy spring (1705) on the guide rail (1706) is suitable for synchronously stretching when the first traction steel rope (1701) is pulled.

8. The seamless switching AC output device according to claim 3, characterized in that: The heat dissipation fans (25) are distributed at equal intervals on the second conductive plate (23), and the diameter of the heat dissipation fans (25) is equal to the aperture of the third through hole (26).

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