A distributed electric energy conversion device with port internal switching function

Abstract

The present invention discloses a distributed electric energy conversion device with an internal port switching function, which relates to the technical field of electric energy conversion, and includes a protective shell, a front cover plate is fixedly installed at the front end of the protective shell, a rear cover plate is fixedly installed at the rear end of the protective shell, and a first converter, a second converter, a third converter and a fourth converter are respectively installed on the outer side of the positioning seat. The present invention can convert the input current into output current of various powers through the combination of the first converter, the second converter, the third converter and the fourth converter in conjunction with the internal switching mechanism, thereby improving the convenience of electric energy conversion and switching, and the setting of the ventilation and heat dissipation mechanism can timely dissipate the heat generated during the electric energy conversion process to improve the heat dissipation effect, wherein in the process of operating the internal switching mechanism, the pneumatic cleaning mechanism can also be linked to realize the internal dust cleaning work, thereby improving the use effect.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy conversion, and in particular to a distributed electric energy conversion device with a port internal switching function. Background Art

[0002] An electric energy conversion device generally refers to a DC-AC converter, which is a circuit or electromechanical device used for electric energy conversion. It can convert DC power into AC power of different voltages. Generally speaking, the electric energy conversion device includes an input wiring side (such as a DC side), an output wiring side (such as an AC side) and an electric energy conversion system. During operation, electric energy is input from the input wiring side, and after passing through the electric energy conversion system, the second form of electric energy is output from the output wiring side.

[0003] However, the existing electric energy conversion devices still have certain defects when used;

[0004] For example, an energy storage inverter proposed in application number CN201721115018.1 includes a shell, a transmitter, a buzzer, a socket board, a driver, an inverter body, a battery, a main board, and an inductor. The shell is a rectangular parallelepiped structure with equal surfaces on both sides and a hollow interior. The center of the side surface is movably connected to the side surface of the socket board by interference fit and forms a convex shape. The shell height is 7 cm. The main board is a rectangular parallelepiped structure with solid inside and outside and parallel to each other. The edge of the top surface is arranged on the bottom surface of the driver and forms an L shape. The thickness of the main board is 30 mm-40 mm. In this application, the detector detects the energy storage capacity of the battery through the main board, and transmits it to the processing chip through the circuit board for processing. When the energy storage is full, the controller controls the buzzer body through the voice coil through the circuit board to emit a buzzing sound and light up the indicator light, and cuts off the power supply to the battery in time to avoid damage to the energy storage inverter. In actual use, there are still the following problems:

[0005] When converting electric energy, the energy storage inverter can only convert the input current into the output power of the rated power. When the current output of different powers is required, it is necessary to select the corresponding electric energy converter. It is impossible to achieve the output of different power currents on the same device, which reduces the convenience of use and operation and reduces the use effect.

[0006] A large amount of heat will be generated during the use of the energy storage inverter, but the energy storage inverter is not provided with a structure to disperse the heat, which will reduce the heat dissipation effect. The existing electric energy conversion devices with heat dissipation function often use air cooling to reduce the temperature, which will cause dust to enter the device and affect the heat dissipation effect.

[0007] In view of this, we conducted in-depth research on the above issues, which led to the present case.

[0008] In view of the above problems, an innovative design is carried out based on the original distributed power conversion device with port internal switching function. Summary of the invention

[0009] The purpose of the present invention is to provide a distributed power conversion device with an internal port switching function to solve the problem in the above background technology that different power conversion devices need to be selected when converting direct current into alternating current of different powers, which reduces the use effect and the heat dissipation effect.

[0010] To achieve the above object, the present invention provides the following technical solution: a distributed power conversion device with port internal switching function, comprising a protective housing,

[0011] A front cover is fixedly mounted on the front end of the protective housing, a rear cover is fixedly mounted on the rear end of the protective housing, a mounting plate is fixedly mounted on the rear side of the rear cover by bolts, a positioning seat is fixedly connected to the inner side of the mounting plate, and a first converter, a second converter, a third converter and a fourth converter are respectively mounted on the outer side of the positioning seat;

[0012] The first converter, the second converter, the third converter and the fourth converter are fitted with heat dissipation fins on one side close to the positioning seat, the heat dissipation fins are fixedly connected to the positioning seat, and a ventilation and heat dissipation mechanism is installed at the rear end of the positioning seat;

[0013] The front ends of the first converter, the second converter, the third converter and the fourth converter are fixedly connected with fixed contacts, an observation window is provided inside the front cover at a position corresponding to the front ends of the fixed contacts, and the observation window is made of transparent glass, and the rear ends of the first converter, the second converter, the third converter and the fourth converter are all equipped with connection ports;

[0014] An internal switching mechanism is installed inside the front end of the positioning seat;

[0015] The rear end of the internal switching mechanism is connected with a pneumatic cleaning mechanism, and the pneumatic cleaning mechanism is connected with the heat dissipation fins.

[0016] Preferably, the first converter, the second converter, the third converter and the fourth converter are distributed clockwise on the outer circle of the positioning seat.

[0017] The above technical solution makes it easy to switch one of the first converter, the second converter, the third converter and the fourth converter to perform electric energy conversion according to the output power demand, which is beneficial for the distributed electric energy conversion device to convert the input current into multiple power outputs, thereby improving the use effect of the distributed electric energy conversion device and the diversity of electric energy conversion.

[0018] Preferably, the ventilation and heat dissipation mechanism includes a rear connecting seat installed at an equal angle on the inner side of the rear end of the positioning seat, the inner end of the rear connecting seat is fixedly connected to a servo motor, the shaft end of the servo motor is fixedly connected to a transmission shaft, and the rear end outer ring of the transmission shaft is fixedly installed with cooling fan blades, and the cooling fan blades are distributed at equal angles at the rear end of the transmission shaft.

[0019] Preferably, the ventilation and heat dissipation mechanism also includes a dustproof net embedded on the inner side of the rear end of the positioning seat, and the front outer ring of the protective shell is provided with heat dissipation grooves at equal angles.

[0020] The above technical solution is adopted to facilitate the rapid dissipation of heat derived from the heat sink fins through the ventilation and heat dissipation mechanism, thereby being able to effectively dissipate the heat generated by the first converter, the second converter, the third converter and the fourth converter during the power conversion process, thereby improving the heat dissipation effect of the distributed power conversion device with port internal switching function.

[0021] Preferably, the internal switching mechanism includes a front connecting seat installed at an equiangular angle on the inner side of the front end of the positioning seat, a limiting seat is fixedly installed on the inner end of the front connecting seat, a movable rod is slidably connected to the inside of the limiting seat, a rotating plate is fixedly connected to the front end of the movable rod, a return spring is provided on the outer ring of the movable rod between the rotating plate and the limiting seat, a connecting shaft is connected to the outer ring of the rotating plate, an insulating seat is installed on the front end of the connecting shaft, and a knob is fixedly provided on the outer ring of the front end of the insulating seat.

[0022] Preferably, the internal switching mechanism also includes a connecting piece embedded in the insulating seat, a movable contact is fixedly installed on the front side of the top end of the connecting piece, a wiring port is fixedly connected to the front end of the connecting piece, and the wiring port is embedded in the front end of the insulating seat, and a connecting plate is symmetrically installed on the outer ring of the insulating seat with the connecting piece as the center line, and a cleaning brush is fixedly installed on the front side of one end of the connecting plate away from the insulating seat.

[0023] Preferably, the movable rod is slidably connected to the limit seat, the rotating plate forms a telescopic structure with the limit seat through a reset spring, the insulating seat is rotatably connected to the rotating plate through a connecting shaft, and the movable contact is movably engaged with the fixed contact.

[0024] The above technical solution makes it easy to connect the internal switching mechanism with the corresponding fixed contacts at the front ends of the first converter, the second converter, the third converter and the fourth converter, so as to facilitate the conversion of the input current into different powers and output it through the connection port at the rear end, thereby improving the operational convenience of the power conversion and switching work of the distributed power conversion device with port internal switching function.

[0025] Preferably, the pneumatic cleaning mechanism includes a piston sleeve fixedly mounted on the rear side of the limit seat, the interior of the piston sleeve is slidably connected to a piston body, the front end outer ring of the piston body is provided with a ventilation groove, the front end outer ring of the piston sleeve is provided with a through hole, and the piston body slides inside the piston sleeve as the movable rod moves.

[0026] Preferably, the pneumatic cleaning mechanism also includes a one-way air inlet valve fixedly embedded in the rear end center of the piston sleeve, and the rear end of the piston sleeve is also fixedly embedded with a one-way air outlet valve, the outlet end of the one-way air outlet valve is fixedly connected to a connecting pipe, the outlet end of the connecting pipe is fixedly connected to a diverter seat, the diverter seat is fixedly installed on the inner side of the middle part of the heat dissipation fin, and two-way nozzles are evenly spaced apart on the side of the diverter seat away from the connecting pipe.

[0027] Preferably, the ventilation groove is opened at an equal angle on the front outer ring of the piston body, the through port is opened at an equal angle on the front outer ring of the piston sleeve, the ventilation groove and the through port correspond to each other, the one-way air outlet valve is distributed at an equal angle on the rear end of the piston sleeve, and the two-way nozzle corresponds to the slots of the heat dissipation fins one by one.

[0028] The adoption of the above technical solution makes it convenient to synchronously drive the pneumatic cleaning mechanism to perform piston-like movement during the operation of the internal switching mechanism, which is beneficial to pneumatically cleaning the dust adhered to the inside of the heat sink fins during the piston exhaust process, thereby avoiding the accumulation of dust affecting the normal heat conduction of the heat sink fins, thereby improving the heat dissipation effect and cleaning convenience of the distributed electric energy conversion device with port internal switching function.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the distributed electric energy conversion device with port internal switching function can convert the input current into output current of various powers through the combination of the first converter, the second converter, the third converter and the fourth converter in cooperation with the internal switching mechanism, thereby improving the convenience of operation of electric energy conversion and switching, and the setting of the ventilation and heat dissipation mechanism can timely dissipate the heat generated during the electric energy conversion process to improve the heat dissipation effect, wherein in the process of operating the internal switching mechanism, the pneumatic cleaning mechanism can also be linked to realize the internal dust cleaning work, thereby improving the use effect, and the specific contents are as follows:

[0030] The arrangement of the heat dissipation fins can effectively extract the heat generated by the first converter, the second converter, the third converter and the fourth converter during the power conversion process, and the arrangement of the ventilation and heat dissipation mechanism can effectively dissipate the heat, thereby improving the heat dissipation effect of the distributed power conversion device;

[0031] The internal switching mechanism can be connected to the fixed contacts corresponding to the first converter, the second converter, the third converter and the fourth converter, so as to facilitate the conversion of the output current through one of the first converter, the second converter, the third converter and the fourth converter according to the output power requirement, thereby improving the power conversion diversity and operation convenience of the distributed power conversion device with the port internal switching function;

[0032] In the process of controlling the internal switching mechanism, the pneumatic cleaning mechanism will be driven to perform a driven piston movement, so that the pneumatic cleaning mechanism can pneumatically clean the dust adhered to the inside of the heat sink fins during the piston jet process, thereby avoiding the accumulation of dust affecting the thermal conductivity and heat dissipation effects of the heat sink fins, and further improving the heat dissipation effect and cleaning convenience of the distributed electric energy conversion device with port internal switching function. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front side structural schematic diagram of the present invention;

[0034] Figure 2 It is a schematic diagram of the rear side structure of the present invention;

[0035] Figure 3 It is a schematic diagram of the side cross-section structure of the protective housing, the front cover plate and the rear cover plate of the present invention;

[0036] Figure 4 It is a schematic diagram of the distribution structure of the first converter, the second converter, the third converter and the fourth converter of the present invention;

[0037] Figure 5 This is a schematic diagram of the distribution structure of the heat dissipation fins inside the positioning seat of the present invention;

[0038] Figure 6 It is a schematic diagram of the connection structure between the positioning seat side section and the ventilation and heat dissipation mechanism of the present invention;

[0039] Figure 7 It is a schematic diagram of the connection structure between the internal switching mechanism and the pneumatic cleaning mechanism of the present invention;

[0040] Figure 8 It is a schematic diagram of the side section structure of the internal switching mechanism of the present invention;

[0041] Fig. 9 It is a schematic diagram of the side section structure of the pneumatic cleaning mechanism of the present invention;

[0042] Fig.10 It is a schematic diagram of the connection structure between the pneumatic cleaning mechanism and the heat dissipation fins of the present invention.

[0043] In the figure: 1, protective housing; 2, front cover; 3, rear cover; 4, mounting plate; 5, positioning seat; 6, first converter; 7, second converter; 8, third converter; 9, fourth converter; 10, heat dissipation fins; 11, rear connection seat; 12, servo motor; 13, transmission shaft; 14, heat dissipation fan blades; 15, dustproof net; 16, heat dissipation slot; 17, fixed contact; 18, observation window; 19, connection port; 20, front connection seat; 21, Limit seat; 22. movable rod; 23. rotating plate; 24. reset spring; 25. connecting shaft; 26. insulating seat; 27. knob; 28. connecting piece; 29. ​​movable contact; 30. wiring port; 31. connecting plate; 32. cleaning brush; 33. piston sleeve; 34. piston body; 35. ventilation groove; 36. through-port; 37. one-way air inlet valve; 38. one-way air outlet valve; 39. connecting pipe; 40. diverter seat; 41. two-way nozzle. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-10 The present invention provides a technical solution: a distributed electric energy conversion device with an internal port switching function, comprising a protective shell 1, a front cover plate 2 is fixedly installed at the front end of the protective shell 1, a rear cover plate 3 is fixedly installed at the rear end of the protective shell 1, a mounting plate 4 is fixedly installed by bolts on the rear side of the rear cover plate 3, a positioning seat 5 is fixedly connected to the inner side of the mounting plate 4, and a first converter 6, a second converter 7, a third converter 8 and a fourth converter 9 are respectively installed on the outer side of the positioning seat 5, the first converter 6, the second converter 7, the third converter 8 and the fourth converter 9 are distributed clockwise on the outer circle of the positioning seat 5, and the first converter 6, the second converter 7, the third converter 8 and the fourth converter 9 are close to the side of the positioning seat 5. A heat dissipation fin 10 is connected, and the heat dissipation fin 10 is fixedly connected to the positioning seat 5. A ventilation and heat dissipation mechanism is installed at the rear end of the positioning seat 5. The ventilation and heat dissipation mechanism includes a rear connecting seat 11 installed at an equal angle on the inner side of the rear end of the positioning seat 5. The inner end of the rear connecting seat 11 is fixedly connected to a servo motor 12. The shaft end of the servo motor 12 is fixedly connected to a transmission shaft 13. A heat dissipation fan blade 14 is fixedly installed on the outer ring of the rear end of the transmission shaft 13. The heat dissipation fan blade 14 is distributed at equal angles at the rear end of the transmission shaft 13. The ventilation and heat dissipation mechanism also includes a dustproof net 15 embedded and installed on the inner side of the rear end of the positioning seat 5. A heat dissipation groove 16 is opened at equal angles on the outer ring of the front end of the protective shell 1. The heat dissipation groove 16, the positioning seat 5 and the dustproof net 15 constitute a filtered heat dissipation ventilation channel;

[0046] The design of the above structure enables the heat generated by the first converter 6, the second converter 7, the third converter 8 and the fourth converter 9 during the process of converting electric energy to be discharged to the inner side of the positioning seat 5 through the corresponding heat dissipation fins 10. At this time, the servo motor 12 can drive the transmission shaft 13 and the heat dissipation fan blades 14 distributed at equal angles to rotate, so that the heat dissipation fan blades 14 generate power, so as to facilitate the filtering extraction of external air in cooperation with the dustproof net 15 at the rear end, and filter the air out through the heat dissipation slots 16 distributed at equal angles at the front end. In the process of air flow movement, the heat discharged by the heat dissipation fins 10 can be discharged in a follow-up manner, thereby realizing the rapid heat dissipation of the first converter 6, the second converter 7, the third converter 8 and the fourth converter 9. The setting of the mounting plate 4 can stably connect the positioning seat 5 and the rear cover plate 3, and the structure composed of the front cover plate 2, the rear cover plate 3 and the protective shell 1 can wrap the internal components for protection.

[0047] The front ends of the first converter 6, the second converter 7, the third converter 8 and the fourth converter 9 are fixedly connected with a fixed contact 17, and an observation window 18 is provided inside the front cover plate 2 at a position corresponding to the front end of the fixed contact 17, and the observation window 18 is made of transparent glass. The rear ends of the first converter 6, the second converter 7, the third converter 8 and the fourth converter 9 are all equipped with a connection port 19, and an internal switching mechanism is installed inside the front end of the positioning seat 5, and the internal switching mechanism includes a front connecting seat 20 installed at an equal angle on the inner side of the front end of the positioning seat 5, and a limit seat 21 is fixedly installed on the inner end of the front connecting seat 20, and a movable rod 22 is slidably connected inside the limit seat 21, and the movable rod 22 is slidably connected to the limit seat 21, and the front end of the movable rod 22 is fixedly connected to a rotating plate 23, and a reset spring is provided on the outer ring of the movable rod 22 between the rotating plate 23 and the limit seat 21 Spring 24, the rotating plate 23 forms a telescopic structure with the limit seat 21 through the return spring 24, the outer ring of the rotating plate 23 is connected to the connecting shaft 25, and the front end of the connecting shaft 25 is installed with an insulating seat 26, and the insulating seat 26 is rotatably connected to the rotating plate 23 through the connecting shaft 25. The front end outer ring of the insulating seat 26 is fixedly sleeved with a knob 27, and the internal switching mechanism also includes a connecting piece 28 embedded in the insulating seat 26, and a movable contact 29 is fixedly installed on the top front side of the connecting piece 28. The movable contact 29 is movably engaged with the fixed contact 17, and the front end of the connecting piece 28 is fixedly connected with a wiring port 30, and the wiring port 30 is embedded in the front end of the insulating seat 26. The outer ring of the insulating seat 26 is symmetrically installed with a connecting plate 31 with the connecting piece 28 as the center line, and a cleaning brush 32 is fixedly installed on the front side of the end of the connecting plate 31 away from the insulating seat 26;

[0048] The above structure is designed to select a group of the first converter 6, the second converter 7, the third converter 8 and the fourth converter 9 according to the required output current power, and then the insulating seat 26 is driven to move backward by squeezing the knob 27, and then the insulating seat 26 cooperates with the rotating plate 23 to compress the reset spring 24, and as the insulating seat 26 retreats, the connecting piece 28 and the movable contact 29 will be driven to retreat synchronously, thereby releasing the engagement between the movable contact 29 and the current fixed contact 17, and then the insulating seat 26 is driven to cooperate with the connecting shaft 25 to rotate at the front end of the rotating plate 23 by rotating the knob 27, and the insulating seat 26 drives the connecting piece 28 and the movable contact 29 to rotate until the movable contact 29 rotates to correspond to the fixed contact 17 at the rear end of the selected converter, and at this time, the pressure on the knob 27 is released, so that The reset spring 24 pushes the rotating plate 23, the insulating seat 26, the connecting piece 28 and the movable contact 29 to reset, and makes the movable contact 29 engage with the currently corresponding fixed contact 17. At this time, the wiring port 30 at the front end of the insulating seat 26 cooperates with the connecting piece 28, the movable contact 29, the fixed contact 17 and the selected converter and the corresponding connecting port 19 to form a circulating circuit, so as to convert the input current into the output current of the required power. The movable rod 22 will slide inside the limit seat 21 with the extension and retraction of the rotating plate 23 and the insulating seat 26, so as to limit the extension and retraction of the insulating seat 26. The insulating seat 26 will also drive the connecting plate 31 and the cleaning brush 32 to rotate during the rotation process, so as to facilitate the cleaning brush 32 to clean the inner side of the fixed contact 17 during the rotation process to avoid dust adhesion affecting the conductive effect.

[0049] The rear end of the internal switching mechanism is connected to a pneumatic cleaning mechanism, which is connected to the heat dissipation fins 10. The pneumatic cleaning mechanism includes a piston sleeve 33 fixedly installed on the rear side of the limit seat 21, and the piston sleeve 33 is slidably connected to the piston body 34. The front end outer ring of the piston body 34 is provided with a venting groove 35, and the venting groove 35 is provided at an equal angle to the front end outer ring of the piston body 34. The front end outer ring of the piston sleeve 33 is provided with a through hole 36, and the through hole 36 is provided at an equal angle to the front end outer ring of the piston sleeve 33. The venting groove 35 and the through hole 36 correspond to each other, and the piston body 34 moves in the piston as the movable rod 22 moves. The sleeve 33 slides inside, and the pneumatic cleaning mechanism also includes a one-way air inlet valve 37 fixedly embedded in the rear end center of the piston sleeve 33. The rear end of the piston sleeve 33 is also fixedly embedded with a one-way air outlet valve 38. The one-way air outlet valves 38 are distributed at equal angles at the rear end of the piston sleeve 33. The outlet end of the one-way air outlet valve 38 is fixedly connected to a connecting pipe 39, and the outlet end of the connecting pipe 39 is fixedly connected to a diverter seat 40. The diverter seat 40 is fixedly installed on the inner side of the middle part of the heat dissipation fin 10. A side of the diverter seat 40 away from the connecting pipe 39 is evenly spaced with a two-way nozzle 41, and the two-way nozzle 41 corresponds to the slots of the heat dissipation fin 10 one by one.

[0050] The design of the above structure enables the movable rod 22 to slide forward inside the limit seat 21 when the reset spring 24 pushes the rotating plate 23 and the insulating seat 26 to reset, thereby driving the piston body 34 at the rear end to move forward inside the piston sleeve 33, and cooperating with the one-way air intake valve 37 to perform air intake work. When the insulating seat 26 is squeezed and moved backward, the movable rod 22 will also be driven to move backward inside the limit seat 21, and the piston body 34 will be driven to move forward inside the piston sleeve 33, so that the sucked air can be discharged to the inside of the diverter seat 40 through the one-way air outlet valve 38 and the connecting pipe 39, and sprayed out through the two-way nozzle 41, so that the dust adhered to the inner side of the heat dissipating fin 10 can be pneumatically cleaned during the spraying process, wherein the setting of the through hole 36 and the ventilation groove 35 can ventilate the front end of the piston sleeve 33 to avoid affecting the expansion and contraction of the piston body 34.

[0051] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distributed electric energy conversion device with a port internal switching function, comprising a protective housing (1), characterized in that: A front cover plate (2) is fixedly mounted on the front end of the protective housing (1), a rear cover plate (3) is fixedly mounted on the rear end of the protective housing (1), a mounting plate (4) is fixedly mounted on the rear side of the rear cover plate (3) by bolts, a positioning seat (5) is fixedly connected to the inner side of the mounting plate (4), and a first converter (6), a second converter (7), a third converter (8) and a fourth converter (9) are respectively mounted on the outer side of the positioning seat (5); A heat dissipation fin (10) is fitted and connected to one side of the first converter (6), the second converter (7), the third converter (8) and the fourth converter (9) close to the positioning seat (5); the heat dissipation fin (10) is fixedly connected to the positioning seat (5); and a ventilation and heat dissipation mechanism is installed at the rear end of the positioning seat (5); The front ends of the first converter (6), the second converter (7), the third converter (8) and the fourth converter (9) are fixedly connected to fixed contacts (17); an observation window (18) is provided inside the front cover plate (2) at a position corresponding to the front ends of the fixed contacts (17); the observation window (18) is made of transparent glass; and the rear ends of the first converter (6), the second converter (7), the third converter (8) and the fourth converter (9) are all provided with connection ports (19); An internal switching mechanism is installed inside the front end of the positioning seat (5); The internal switching mechanism comprises a front connecting seat (20) mounted at an equal angle on the inner side of the front end of the positioning seat (5); a limiting seat (21) is fixedly mounted on the inner end of the front connecting seat (20); a movable rod (22) is slidably connected to the inside of the limiting seat (21); a rotating plate (23) is fixedly connected to the front end of the movable rod (22); a return spring (24) is provided on the outer ring of the movable rod (22) between the rotating plate (23) and the limiting seat (21); a connecting shaft (25) is connected to the outer ring of the rotating plate (23); an insulating seat (26) is mounted on the front end of the connecting shaft (25); and a knob (27) is fixedly provided on the outer ring of the front end of the insulating seat (26); The internal switching mechanism further comprises a connecting piece (28) embedded in the interior of the insulating seat (26), a movable contact (29) being fixedly mounted on the front side of the top end of the connecting piece (28), a wiring port (30) being fixedly connected to the front end of the connecting piece (28), the wiring port (30) being embedded in the interior of the front end of the insulating seat (26), a connecting plate (31) being symmetrically mounted on the outer ring of the insulating seat (26) with the connecting piece (28) as the center line, and a cleaning brush (32) being fixedly mounted on the front side of one end of the connecting plate (31) away from the insulating seat (26); A pneumatic cleaning mechanism is connected to the rear end of the internal switching mechanism, and the pneumatic cleaning mechanism is interconnected with the heat dissipation fins (10); The pneumatic cleaning mechanism comprises a piston sleeve (33) fixedly mounted on the rear side of the limit seat (21), a piston body (34) being slidably connected inside the piston sleeve (33), a ventilation groove (35) being provided on the front outer ring of the piston body (34), a through hole (36) being provided on the front outer ring of the piston sleeve (33), and the piston body (34) slidingly slides inside the piston sleeve (33) as the movable rod (22) moves; The pneumatic cleaning mechanism also includes a one-way air inlet valve (37) fixedly embedded in the center of the rear end of the piston sleeve (33); the rear end of the piston sleeve (33) is also fixedly embedded with a one-way air outlet valve (38); the outlet end of the one-way air outlet valve (38) is fixedly connected to a connecting pipe (39); the outlet end of the connecting pipe (39) is fixedly connected to a diverter seat (40); the diverter seat (40) is fixedly installed on the inner side of the middle part of the heat dissipation fin (10); and two-way nozzles (41) are installed at equal intervals on one side of the diverter seat (40) away from the connecting pipe (39).

2. A distributed power conversion device with port internal switching function according to claim 1, characterized in that: The first converter (6), the second converter (7), the third converter (8) and the fourth converter (9) are distributed in a clockwise direction on the outer ring of the positioning seat (5).

3. A distributed power conversion device with port internal switching function according to claim 1, characterized in that: The ventilation and heat dissipation mechanism comprises a rear connecting seat (11) which is installed at an equal angle on the inner side of the rear end of the positioning seat (5); the inner end of the rear connecting seat (11) is fixedly connected to a servo motor (12); the shaft end of the servo motor (12) is fixedly connected to a transmission shaft (13); the rear end outer ring of the transmission shaft (13) is fixedly installed with heat dissipation fan blades (14); the heat dissipation fan blades (14) are distributed at equal angles at the rear end of the transmission shaft (13).

4. A distributed power conversion device with port internal switching function according to claim 3, characterized in that: The ventilation and heat dissipation mechanism also includes a dust screen (15) mounted on the inner side of the rear end of the positioning seat (5); the front outer ring of the protective housing (1) is provided with heat dissipation grooves (16) at equal angles; the heat dissipation grooves (16), the positioning seat (5) and the dust screen (15) form a filtering heat dissipation ventilation channel.

5. A distributed power conversion device with port internal switching function according to claim 1, characterized in that: The movable rod (22) is slidably connected to the limit seat (21), the rotating plate (23) forms a telescopic structure with the limit seat (21) via a return spring (24), the insulating seat (26) is rotatably connected to the rotating plate (23) via a connecting shaft (25), and the movable contact (29) is movably engaged with the fixed contact (17).

6. A distributed power conversion device with port internal switching function according to claim 1, characterized in that: The ventilation groove (35) is formed at an equal angle on the front outer ring of the piston body (34), the through-hole (36) is formed at an equal angle on the front outer ring of the piston sleeve (33), the ventilation groove (35) and the through-hole (36) correspond to each other, the one-way air outlet valve (38) is distributed at an equal angle on the rear end of the piston sleeve (33), and the two-way nozzle (41) corresponds to the slots of the heat dissipation fins (10) one by one.

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