CN116827079B

CN116827079B - Solar photovoltaic inverter

Info

Publication number: CN116827079B
Application number: CN202310560663.8A
Authority: CN
Inventors: 霍俊东; 王灿
Original assignee: Enwo New Energy Technology Shanghai Co ltd
Current assignee: Enwo New Energy Technology Shanghai Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2024-04-02
Anticipated expiration: 2043-05-18
Also published as: CN116827079A

Abstract

The invention relates to the technical field of power electronics and discloses a solar photovoltaic inverter.A main body of the inverter is arranged on the front side of a heat dissipation device, and two exhaust ports can be respectively butted with axial air inlets of two centrifugal fans; on the contrary, when the inverter body is separated from the heat dissipation device, the air suction opening can be separated from the corresponding axial air inlet, and the solar photovoltaic inverter provided by the invention has the advantages that the inverter body and the heat dissipation device are in split type design. When the inverter body is arranged on the front side of the heat dissipation device, the two exhaust openings on the inverter body can be in butt joint with the axial air inlets of the two centrifugal fans in the heat dissipation device. When the centrifugal fan is started, the centrifugal fan can extract heat generated by the operation of the inverter body through the exhaust port so as to reduce the temperature of the inverter during the operation. When the inverter body needs to be maintained, the inverter body can be directly separated from the heat dissipation device, and the maintenance of the inverter body can be simpler and quicker under the condition that the heat dissipation device is not arranged.

Description

Solar photovoltaic inverter

Technical Field

The invention relates to the technical field of power electronics, in particular to a solar photovoltaic inverter.

Background

The solar photovoltaic inverter is an inverter capable of converting a variable direct voltage generated by a photovoltaic solar panel into alternating current with a mains frequency, and is capable of feeding back the converted voltage to a commercial power transmission system or for use by an off-grid power grid. The solar photovoltaic inverter is one of important system balances in a photovoltaic array system, and can be used with common alternating current power supply equipment. The solar photovoltaic inverter has special functions of matching with the photovoltaic array, such as maximum power point tracking and island effect protection. A similar solar photovoltaic inverter is disclosed as patent document CN 212627316U.

In the operation process of a solar photovoltaic inverter (hereinafter referred to as an inverter), an internal circuit of the solar photovoltaic inverter generates large heat, and in order to ensure that equipment can normally operate, a cooling fan is usually installed in the inverter so as to reduce the operation temperature of the equipment. However, the conventional radiator fan is generally covered behind the internal circuit of the inverter, so that the disassembly and maintenance of the apparatus become complicated, and thus there is a need for improvement.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a solar photovoltaic inverter, wherein an inverter body is arranged at the front side of a heat dissipation device, and heat generated by the operation of the inverter can be pumped away through the heat dissipation device, so that the operation of equipment is more stable; if the inverter body is detached from the heat dissipation device, the inverter body can be maintained independently, so that the maintenance process is simplified, and the inverter is more humanized.

In order to solve the technical problems, the invention is solved by the following technical scheme:

the solar photovoltaic inverter comprises an inverter body and a heat radiating device which is detachably connected to the rear side of the inverter body, wherein the heat radiating device comprises a shell arranged on a wall surface and two centrifugal fans which are arranged in the shell in parallel, axial air inlets of the two centrifugal fans face the front side of the shell, tangential air outlets of the two centrifugal fans are arranged in opposite directions, main air outlets for respectively butt joint of the tangential air outlets of the two centrifugal fans are formed in the left side wall and the right side wall of the shell, and an opening for exposing the axial air inlets of the two centrifugal fans is formed in the front side of the shell;

the inverter body comprises a shell, a main air inlet arranged on the left side wall and the right side wall of the shell, and two exhaust ports arranged on the rear side wall of the shell;

when the inverter body is arranged on the front side of the heat dissipation device, the two exhaust ports can be respectively abutted to the axial air inlets of the two centrifugal fans; on the contrary, when the inverter body is separated from the heat dissipation device, the two exhaust ports can be separated from the corresponding axial air inlets.

By adopting the scheme, the radiating device can be independently arranged on the wall surface, and the inverter body and the radiating device are in split type design. When the inverter body is arranged on the front side of the heat dissipation device, the two exhaust openings on the inverter body can be in butt joint with the axial air inlets of the two centrifugal fans in the heat dissipation device. When the centrifugal fan is started, the centrifugal fan can extract heat generated by the operation of the inverter body through the exhaust port and is discharged through the tangential air outlet and the main air outlet. The outside fresh air can enter the inverter body through the main air inlet on the shell so as to realize air external circulation, thereby reducing the temperature of the inverter during operation and enabling the equipment to operate more stably. When the inverter body needs to be maintained, the inverter body can be directly separated from the heat dissipation device, and the maintenance of the inverter body can be simpler and quicker under the condition that the heat dissipation device is not arranged, so that the operation efficiency is improved.

Preferably, the rear side wall of the shell is provided with an elastic butt joint ring along the edge ring of the exhaust port, and the elastic butt joint ring is used for butt joint and pressing the edge of the axial air inlet.

By adopting the scheme, the elastic butt joint ring can improve the tightness of the air suction port when being in butt joint with the axial air inlet, so that the air suction effect of the centrifugal fan is better, and the heat radiation performance of the heat radiation device is improved.

Preferably, mounting plates are arranged on two sides of the shell and close to the rear positions, and mounting holes are formed in the mounting plates.

By adopting the scheme, the shell of the heat radiating device can be stably arranged on the wall surface.

Preferably, a supporting plate is arranged in the shell, a plurality of supporting columns are arranged on the surface of the supporting plate, and the centrifugal fan is fixed on the supporting columns through screws.

By adopting the scheme, the centrifugal fan can be stably arranged inside the shell of the heat radiating device.

Preferably, a start-stop unit is arranged on the upper side of the shell, a control unit is coupled to the start-stop unit, and two centrifugal fans are both coupled to and controlled by the control unit;

when the start-stop unit responds to single external trigger, the control unit controls the two centrifugal fans to run;

when the start-stop unit responds to two continuous external triggers, the control unit controls the two centrifugal fans to stop.

By adopting the scheme, the single start-stop unit can realize start-stop operation of the heat dissipating device, so that the operation convenience can be improved, and the appearance of the heat dissipating device is simpler.

Preferably, the rear side wall of the shell is provided with inserted bars at two opposite angle positions, the opening is internally provided with sleeves for the two inserted bars to be inserted respectively at the two opposite angle positions, the upper side wall of the upper sleeve and the lower side wall of the lower sleeve slide and penetrate through positioning pins, the rod body of the inserted bar is provided with positioning holes for the positioning pins to be inserted, and the sleeve is provided with a first elastic driving assembly so that the positioning pins have a trend of entering the inner cavity of the sleeve; when the whole inserted rod is inserted into the sleeve, the first elastic driving assembly drives the positioning pin to be inserted into the positioning hole so as to prevent the inserted rod from being separated from the sleeve; a push rod is arranged on one side of the sleeve, far away from the inverter body, in a sliding way, and a second elastic driving assembly is arranged on the sleeve so that the push rod has a tendency of pushing the inserted rod out of the sleeve; when the locating pin overcomes the elasticity of the first elastic driving component under the action of external force and breaks away from the locating hole, the second elastic driving component can drive the push rod to extend out so as to push the inserted rod out of the sleeve, and the side wall of the push rod can separate the end part of the locating pin so as to prevent the locating pin from retreating under the action of the first elastic driving component.

By adopting the scheme, when the two inserted bars are all inserted into the corresponding sleeves, the positioning pins are inserted into the positioning holes of the inserted bars through the first elastic driving assembly, the inverter body can be stably installed on the front side of the heat radiating device, and meanwhile, the air suction port and the axial air inlet are in butt joint. After the locating pins in the two first elastic driving assemblies are all pulled out from the corresponding locating holes, the axial locking of the two inserted bars in the corresponding sleeves can be relieved, and under the driving of the second elastic driving assemblies, the push rod can push the inserted bars out of the sleeves so as to complete the automatic disassembly of the inverter body. Meanwhile, the push rod after pushing out can separate the locating pin which contracts, the locating pin is prevented from resetting under the action of the first elastic driving assembly, when the inverter body is installed again by a user, the locating pin is not required to be pulled out by hands, and therefore single-person disassembly and assembly of the inverter body are achieved, and therefore operation efficiency and convenience are improved.

Preferably, the first elastic driving assembly comprises a first guide sleeve vertically arranged on the outer side wall of the sleeve and communicated with the inner cavity of the sleeve for the locating pin to slide and pass through, a first connecting rod coaxially connected to the tail end of the locating pin, a first limiting plate arranged at a port of the first guide sleeve far away from the sleeve for preventing the locating pin from separating from the first guide sleeve, and a first guide hole penetrating through the plate surface of the first limiting plate for the first connecting rod to slide and pass through, a first limiting piece for preventing the first connecting rod from separating from the first guide hole is arranged at the end part of the first connecting rod far away from the locating pin, the outer diameter of the first connecting rod is smaller than the outer diameter of the locating pin, a first pressure spring is sleeved on the first connecting rod, and two ends of the first pressure spring respectively prop against the opposite surfaces of the first limiting plate and the locating pin;

the second elastic driving assembly comprises a second guide sleeve coaxially connected to the sleeve and far away from the port of the inverter body for sliding and penetrating the push rod, a second connecting rod coaxially connected to the push rod and far away from the end part of the inserted rod, a second limiting plate arranged on the second guide sleeve and far away from the port of the inverter body and preventing the push rod from separating from the second guide sleeve, and a second guide hole penetrating through the plate surface of the second limiting plate and for sliding and penetrating the second connecting rod, a second limiting piece preventing the second connecting rod from separating from the second guide hole is arranged at the end part of the second connecting rod far away from the push rod, the outer diameter of the second connecting rod is smaller than that of the push rod, a second pressure spring is sleeved on the second connecting rod, and two ends of the second pressure spring are respectively propped against opposite surfaces of the second limiting plate and the push rod.

By adopting the scheme, the structure can realize the elastic pushing function of the first elastic driving assembly and the second elastic driving assembly, so that the operation of the positioning pin and the push rod is more stable and efficient.

Preferably, the inserted link is close to the end face of the push rod and is provided with an upper connecting block at the upper position, the push rod is close to the end face of the inserted link and is provided with a lower connecting block at the lower position, when the upper connecting block and the lower connecting block are in an upper and lower splicing state, the upper surface of the upper connecting block is level with the upper part of the outer wall of the push rod; the lower surface of the upper connecting block is provided with a clamping block, the upper surface of the lower connecting block is provided with a clamping groove for clamping the clamping block, the lower side of the clamping block is extended with a plugging rod, and the bottom of the clamping groove is provided with a plugging hole for plugging the plugging rod.

By adopting the scheme, after the two locating pins are pulled out from the corresponding locating holes through the two hands by a user, the inserted link on the inverter body can be transferred to the outside of the sleeve under the action of the push rod. At this time, the inverter body can be hung on the two push rods by means of the cooperation of the upper and lower connecting blocks, and cannot fall down directly, so that the safety of the inverter body is ensured.

Preferably, when the whole inserted rod is inserted into the sleeve, the push rod and the second connecting rod can retract to a state that the second limiting piece is abutted against the inner side wall of the shell under the back pushing action of the inserted rod; the first limiting piece is provided with a proximity sensor which is coupled with the control unit near the plane of the sleeve, the plane of the second limiting piece which is far away from the second connecting rod is provided with a micro switch which is coupled with the control unit, the outer circumferential surface of the second limiting plate is annularly provided with a first annular groove, a first annular electromagnet is embedded in the first annular groove, the outer circumferential surface of the push rod is annularly provided with a second annular groove at a position which is close to the second connecting rod, the second annular groove is embedded with a second annular electromagnet, the end surfaces of the first annular electromagnet and the second annular electromagnet are oppositely arranged, and the first annular electromagnet and the second annular electromagnet are coupled and controlled by the control unit;

if and only if two proximity sensors detect that the corresponding first limiting piece is far away from the outer side wall of the corresponding sleeve, the control unit detects whether the second limiting piece is abutted against the inner side wall of the shell through the micro switch, if the second limiting piece is abutted against the inner side wall of the shell, the control unit controls the first annular electromagnet to operate with the second annular electromagnet so that repulsive force is generated between the first annular electromagnet and the second annular electromagnet, and after a preset time length is set in the first annular electromagnet and the second annular electromagnet operation control unit, the control unit controls the first annular electromagnet and the second annular electromagnet to stop operating;

otherwise, if the second limiting piece is not abutted against the inner side wall of the shell, the control unit does not control the first annular electromagnet and the second annular electromagnet to operate.

By adopting the scheme, when a user pulls out two locating pins from corresponding locating holes simultaneously through both hands and detects the state through corresponding proximity sensors, the control unit can judge whether the second limiting piece is abutted against the inner side wall of the shell through the micro switch, if the second limiting piece is in the abutted state, the control unit controls the first annular electromagnet to operate with the second annular electromagnet so as to generate repulsive force between the first annular electromagnet and the second annular electromagnet, and therefore the second pressure spring is assisted, and the push rod and the inserting rod operate more smoothly. After the push rod stretches out for a period of time, the control unit can control the first annular electromagnet and the second annular electromagnet to stop so that repulsive force between the first annular electromagnet and the second annular electromagnet disappears, and therefore the installation of the inverter body is more labor-saving.

The invention has the remarkable technical effects due to the adoption of the technical scheme: the heat dissipation device can be independently arranged on the wall surface, and the inverter body and the heat dissipation device are in split type design. When the inverter body is arranged on the front side of the heat dissipation device, the two exhaust openings on the inverter body can be in butt joint with the axial air inlets of the two centrifugal fans in the heat dissipation device. When the centrifugal fan is started, the centrifugal fan can extract heat generated by the operation of the inverter body through the exhaust port and is discharged through the tangential air outlet and the main air outlet. The outside fresh air can enter the inverter body through the main air inlet on the shell so as to realize air external circulation, thereby reducing the temperature of the inverter during operation and enabling the equipment to operate more stably. When the inverter body needs to be maintained, the inverter body can be directly separated from the heat dissipation device, and the maintenance of the inverter body can be simpler and quicker under the condition that the heat dissipation device is not arranged, so that the operation efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of a combination structure of an inverter body and a heat dissipating device in the first embodiment;

fig. 2 is a schematic diagram of a structure in which an inverter body and a heat dissipating device are separated in the first embodiment;

FIG. 3 is an exploded view of a heat dissipating device according to the first embodiment;

fig. 4 is a schematic structural diagram of an inverter body in the first embodiment;

fig. 5 is a system architecture diagram of the first embodiment;

FIG. 6 is a schematic view showing the structure of the plug rod fully inserted into the sleeve according to the first embodiment;

FIG. 7 is an enlarged schematic view of portion A of FIG. 6;

FIG. 8 is an enlarged schematic view of portion B of FIG. 2;

FIG. 9 is a schematic diagram showing the cooperation between the positioning pin and the push rod after the plunger leaves the sleeve in the first embodiment;

FIG. 10 is an enlarged schematic view of portion C of FIG. 4;

fig. 11 is a schematic structural diagram of the first embodiment;

fig. 12 is a schematic structural diagram of the second embodiment;

fig. 13 is a system architecture diagram of the second embodiment.

The names of the parts indicated by the numerical reference numerals in the above drawings are as follows: 1. an inverter body; 2. a heat sink; 3. a housing; 4. a centrifugal fan; 5. an axial air inlet; 6. tangential air outlet; 7. a main air outlet; 8. an opening; 9. a housing; 10. a main air inlet; 11. an air suction port; 12. an elastic docking collar; 13. a mounting plate; 14. a mounting hole; 15. a support plate; 16. a support column; 17. a screw; 18. a start-stop unit; 19. a control unit; 20. a rod; 21. a sleeve; 22. a positioning pin; 23. positioning holes; 24. a first elastic driving assembly; 25. a push rod; 26. a second elastic driving assembly; 27. a first guide sleeve; 28. a first link; 29. a first limiting plate; 30. a first guide hole; 31. a first limiting member; 32. a first compression spring; 33. a second guide sleeve; 34. a second link; 35. a second limiting plate; 36. a second guide hole; 37. a second limiting piece; 38. a second compression spring; 39. an upper connecting block; 40. a lower joint block; 41. a clamping block; 42. a clamping groove; 43. inserting a connecting rod; 44. a plug hole; 45. a proximity sensor; 46. a micro-switch; 47. a first ring groove; 48. a first annular electromagnet; 49. a second ring groove; 50. and a second annular electromagnet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 to 4, the solar photovoltaic inverter (hereinafter referred to as an "inverter") disclosed in this embodiment includes an inverter body 1 and a heat dissipating device 2 detachably connected to the rear side of the inverter body 1, specifically, the heat dissipating device 2 includes a housing 3 mounted on a wall surface and two centrifugal fans 4 arranged in the housing 3 in parallel, axial air inlets 5 of the two centrifugal fans 4 face the front side of the housing 3, tangential air outlets 6 of the two centrifugal fans 4 are arranged in opposite directions, main air outlets 7 for respectively butt-jointing the tangential air outlets 6 of the two centrifugal fans 4 are formed in left and right side walls of the housing 3, and an opening 8 for exposing the axial air inlets 5 of the two centrifugal fans 4 is formed in the front side of the housing 3. Correspondingly, the inverter body 1 comprises a shell 9, a main air inlet 10 formed in the left side wall and the right side wall of the shell 9, and two exhaust openings 11 formed in the rear side wall of the shell 9.

In this embodiment, when the inverter body 1 is mounted on the front side of the heat dissipating device 2, the two exhaust openings 11 can be respectively abutted against the axial air inlets 5 of the two centrifugal fans 4, so that the heat dissipating device 2 can extract heat generated by the operation of the inverter body 1. On the contrary, when the inverter body 1 is separated from the heat dissipating device 2, the two exhaust openings 11 can be separated from the corresponding axial air inlets 5, so as to facilitate maintenance of the inverter body 1.

As shown in fig. 4, in order to improve the butt-joint tightness between the air suction opening 11 and the axial air inlet 5, an elastic butt-joint ring 12 for butt-joint and pressing the edge of the axial air inlet 5 is arranged on the rear side wall of the housing 9 along the edge ring of the air suction opening 11, and the elastic butt-joint ring 12 is preferably made of rubber, so that the housing has better elasticity and tightness.

As shown in fig. 1, in order to stably mount the heat sink 2 on a wall surface, mounting plates 13 are provided on both sides of the housing 3 at positions close to the rear, mounting holes 14 are provided on both ends of the plate surface of the mounting plates 13, and the mounting plates 13 and the housing 3 can be stably mounted on the wall surface by means of expansion screws (not shown) and the mounting holes 14, so that stable mounting of the heat sink 2 is completed.

As shown in fig. 3, in order to stably mount the centrifugal fan 4 inside the casing 3, a support plate 15 is provided inside the casing 3, a plurality of support columns 16 are provided on the plate surface of the support plate 15, and the centrifugal fan 4 is fixed to the support columns 16 by screws 17.

As shown in fig. 2 and 5, in order to realize quick start and stop of the heat dissipating device 2, a start and stop unit 18 is disposed on the upper side of the housing 3, the start and stop unit 18 is preferably a push switch, a control unit 19 is coupled to the start and stop unit 18, the control unit 19 is preferably a single-chip microcomputer, and both centrifugal fans 4 are coupled to and controlled by the control unit 19. In the present embodiment, when the start-stop unit 18 responds to a single external trigger, the control unit 19 controls the two centrifugal fans 4 to operate so as to extract the heat generated by the operation of the inverter body 1. When the start-stop unit 18 responds to two consecutive external triggers, the control unit 19 controls the two centrifugal fans 4 to stop so as to stop the heat dissipating device 2.

As shown in fig. 6 to 9, in order to realize the single disassembly and assembly of the inverter body 1, the rear side wall of the housing 9 is provided with the inserting rods 20 at two diagonal positions, the opening 8 is provided with the sleeves 21 for inserting the two inserting rods 20 respectively at the two diagonal positions, the upper side wall of the upper sleeve 21 and the lower side wall of the lower sleeve 21 slide and penetrate through the positioning pins 22, the rod body of the inserting rod 20 is provided with the positioning holes 23 for inserting the positioning pins 22, and the sleeve 21 is provided with the first elastic driving assembly 24 so that the positioning pins 22 have a trend of entering the inner cavity of the sleeve 21. In this embodiment, when the entire insert rod 20 is inserted into the sleeve 21, the first elastic driving assembly 24 drives the positioning pin 22 to be inserted into the positioning hole 23 so as to prevent the insert rod 20 from being separated from the sleeve 21. In order to improve the convenience of the disassembly of the inverter body 1, a push rod 25 is slidably disposed on a side of the sleeve 21 away from the inverter body 1, and a second elastic driving assembly 26 is disposed on the sleeve 21 so that the push rod 25 has a tendency to push the plunger 20 out of the sleeve 21. In this embodiment, as shown in fig. 9, when the positioning pin 22 is separated from the positioning hole 23 against the elastic force of the first elastic driving component 24 under the action of an external force, the second elastic driving component 26 can drive the push rod 25 to extend to push the plunger 20 out of the sleeve 21 and the side wall of the push rod 25 can block the end of the positioning pin 22 to prevent the positioning pin 22 from retreating under the action of the first elastic driving component 24, so as to facilitate the reinstallation of the inverter body 1.

As shown in fig. 6 and 7, in order to realize the elastic pushing function of the first elastic driving assembly 24 and the second elastic driving assembly 26, the first elastic driving assembly 24 includes a first guiding sleeve 27 vertically disposed on an outer sidewall of the sleeve 21 and communicated with an inner cavity of the sleeve 21 for the positioning pin 22 to slide and pass through, a first connecting rod 28 coaxially connected to a tail end of the positioning pin 22, a first limiting plate 29 disposed on a port of the first guiding sleeve 27 far away from the sleeve 21 for preventing the positioning pin 22 from separating from the first guiding sleeve 27, and a first guiding hole 30 penetrating through a plate surface of the first limiting plate 29 for the first connecting rod 28 to slide and pass through, wherein an end portion of the first connecting rod 28 far away from the positioning pin 22 is provided with a first limiting piece 31 for preventing the first connecting rod 28 from separating from the first guiding hole 30, an outer diameter of the first connecting rod 28 is smaller than an outer diameter of the positioning pin 22, a first compression spring 32 is sleeved on the first connecting rod 28, and two ends of the first compression spring 32 are respectively pressed against opposite surfaces of the first limiting plate 29 and the positioning pin 22. The first guide sleeves 27 of the two sets of first elastic driving assemblies 24 respectively penetrate through the upper and lower side walls of the housing 3, so that a user can pull out the first connecting rod 28 by means of the first limiting piece 31 in a direction away from the sleeve 21, and thereby the positioning pins 22 on the first connecting rod 28 are driven to be separated from the positioning holes 23.

Correspondingly, the second elastic driving assembly 26 includes a second guiding sleeve 33 coaxially connected to the port of the sleeve 21 far away from the inverter body 1 for the push rod 25 to slide and pass through, a second connecting rod 34 coaxially connected to the end of the push rod 25 far away from the plunger 20, a second limiting plate 35 arranged at the port of the second guiding sleeve 33 far away from the inverter body 1 for preventing the push rod 25 from separating from the second guiding sleeve 33, and a second guiding hole 36 penetrating through the plate surface of the second limiting plate 35 for the second connecting rod 34 to slide and pass through, a second limiting piece 37 for preventing the second connecting rod 34 from separating from the second guiding hole 36 is arranged at the end of the second connecting rod 34 far away from the push rod 25, the outer diameter of the second connecting rod 34 is smaller than the outer diameter of the push rod 25, a second compression spring 38 is sleeved on the second connecting rod 34, and two ends of the second compression spring 38 are respectively pressed against the opposite surfaces of the second limiting plate 35 and the push rod 25.

As shown in fig. 10 and 11, in order to prevent the inverter body 1 from falling to the ground when detached, the insert rod 20 is close to the end surface of the push rod 25 and is provided with an upper engagement block 39 at an upper position, the push rod 25 is close to the end surface of the insert rod 20 and is provided with a lower engagement block 40 at a lower position, when the upper engagement block 39 and the lower engagement block 40 are in an upper and lower engagement state, the upper surface of the upper engagement block 39 is flush with the upper portion of the outer wall of the push rod 25, and when the abutted insert rod 20 and push rod 25 slide in the sleeve 21, the end portion of the positioning pin 22 is clamped at the joint between the upper engagement block 39 and the push rod 25, so that the inverter body 1 can be detached more smoothly. The lower surface of the upper connecting block 39 is provided with a clamping block 41, the upper surface of the lower connecting block 40 is provided with a clamping groove 42 for clamping the clamping block 41, the lower side of the clamping block 41 is extended with a plugging rod 43, the bottom of the clamping groove 42 is provided with a plugging hole 44 for plugging the plugging rod 43, so that the upper and lower splicing of the upper connecting block 39 and the lower connecting block 40 is more stable and is not easy to separate actively, the automatically ejected inverter body 1 is not easy to drop, and the disassembly safety of the inverter body 1 is further improved.

Example two

As shown in fig. 12 and 13, in order to make the ejection of the inverter body 1 more labor-saving based on the first embodiment, when the entire plunger 20 is inserted into the sleeve 21, the push rod 25 and the second link 34 can retract to a state where the second stopper 37 abuts against the inner side wall of the housing 3 under the reverse pushing action of the plunger 20, so as to limit the retracting stroke of the push rod 25, and thus the positioning pin 22 can be accurately abutted with the positioning hole 23 on the plunger 20. The plane of the first limiting member 31, which is close to the sleeve 21, is provided with a photoelectric proximity sensor 45 coupled to the control unit 19, the plane of the second limiting member 37, which is far away from the second connecting rod 34, is provided with a micro switch 46 coupled to the control unit 19, and the movable contact of the micro switch 46 is arranged in a direction far away from the second connecting rod 34. The outer peripheral surface of the second limiting plate 35 is annularly provided with a first annular groove 47, a first annular electromagnet 48 is embedded in the first annular groove 47, the outer peripheral surface of the push rod 25 is annularly provided with a second annular groove 49 at a position close to the second connecting rod 34, a second annular electromagnet 50 is embedded in the second annular groove 49, and the end surfaces of the first annular electromagnet 48 and the second annular electromagnet 50 are oppositely arranged and are coupled and controlled by the control unit 19.

In this embodiment, if and only if two proximity sensors 45 simultaneously detect that the corresponding first limiting member 31 is away from the outer side wall of the corresponding sleeve 21, it is explained that the two positioning pins 22 have been pulled out from the corresponding positioning holes 23. At this time, the control unit 19 detects whether the second limiting member 37 abuts against the inner sidewall of the housing 3 through the micro switch 46, and if the second limiting member 37 abuts against the inner sidewall of the housing 3, the control unit 19 controls the first annular electromagnet 48 and the second annular electromagnet 50 to operate, so that a repulsive force is generated between the first annular electromagnet 48 and the second annular electromagnet 50, thereby assisting the push rod 25, and enabling the ejection of the inverter body 1 to be smoother. After the first annular electromagnet 48 and the second annular electromagnet 50 run for a preset period of time in the control unit 19, the control unit 19 controls the first annular electromagnet 48 and the second annular electromagnet 50 to stop running, so that electric energy can be saved, and the inverter body 1 can be installed more labor-saving.

On the contrary, if the second limiting member 37 is not abutted against the inner side wall of the housing 3, which indicates that the push rod 25 is in the extended state, the control unit 19 does not control the first annular electromagnet 48 and the second annular electromagnet 50 to operate, so as to avoid the occurrence of misoperation.

The following describes the use process of the solar photovoltaic inverter according to the first and second embodiments:

when the inverter body 1 is separated from the heat dissipating device 2 on the wall surface, the push rod 25 can extend under the elastic force of the second elastic driving assembly 26, so that the lower connecting block 40 can be transferred to the outside of the sleeve 21, and the end part of the corresponding positioning pin 22 can be blocked, so that the positioning pin 22 is prevented from backing under the action of the first elastic driving assembly 24.

When the inverter body 1 is installed, the upper connecting blocks 39 on the two inserting rods 20 are spliced on the upper plane of the lower connecting block 40, so that the clamping blocks 41 are clamped in the clamping grooves 42, and meanwhile, the inserting rods 43 are inserted in the inserting holes 44, so that the butt joint of the inserting rods 20 and the push rods 25 is completed. At this time, the housing 9 of the inverter body 1 is pushed inward to drive the plunger 20 to push the push rod 25 inward. In this process, the push rod 25 retreats against the elastic supporting force of the second compression spring 38 until the second limiting piece 37 on the second connecting rod 34 abuts against the inner side wall of the housing 3, and the positioning pin 22 and the positioning hole 23 complete position calibration. At this time, the positioning pin 22 can be inserted into the positioning hole 23 of the plunger 20 under the elastic force of the first compression spring 32, so as to lock the plunger 20 and the push rod 25 in the sleeve 21, thereby completing the installation of the inverter body 1. At the same time, the two exhaust openings 11 on the back of the inverter body 1 are butted with the axial air inlets 5 of the two centrifugal fans 4 through the elastic butt joint rings 12, so as to complete the connection of the heat dissipation channels. At this time, the start-stop button is pressed, and the control unit 19 controls the two centrifugal fans 4 to operate so as to extract heat generated by the operation of the inverter body 1 through the suction port 11, thereby reducing the operation temperature of the inverter and making the operation of the apparatus more stable. If the heat dissipating device 2 needs to be turned off, the start/stop unit 18 is pressed twice continuously, and the control unit 19 can control the two centrifugal fans 4 to stop running, so that the heat dissipating device 2 is stopped.

When the inverter body 1 is disassembled, two positioning pins 22 are simultaneously pulled out by two hands, so that the positioning pins 22 are separated from the positioning holes 23, and the locking of the inserted rod 20 and the push rod 25 in the sleeve 21 is released. At this time, the proximity sensor 45 can sense that the first limiting member 31 is far away from the outer wall of the corresponding sleeve 21, so that the control unit 19 determines whether the second limiting member 37 abuts against the inner wall of the housing 3 through the micro switch 46, thereby determining whether the push rod 25 is in the contracted state. If the second limiting member 37 abuts against the inner side wall of the housing 3, which indicates that the push rod 25 is in a contracted state, the control unit 19 controls the first annular electromagnet 48 and the second annular electromagnet 50 to operate so as to generate repulsive force therebetween, thereby assisting the second pressure spring 38, and enabling the process of pushing the plunger rod 20 and the inverter body 1 by the push rod 25 to be more labor-saving. When the lower engagement block 40 of the push rod 25 slides out of the sleeve 21, the side wall of the push rod 25 can seal the passage of the positioning pin 22 into the inner cavity of the sleeve 21, so that the positioning pin 22 is prevented from entering the inner cavity of the sleeve 21 under the elastic action of the first pressure spring 32. Finally, the casing 9 of the inverter body 1 is lifted upwards, so that the clamping block 41 and the plugging rod 43 on the upper connecting block 39 can be separated from the clamping groove 42 and the plugging hole 44 respectively, and the disassembly of the inverter body 1 is completed. When the inverter body 1 is detached, it can be individually maintained to simplify the maintenance process.

The electronic control part of the above-mentioned process can be implemented by means of a control program or an equivalent analog circuit built in the control unit 19, which is well known in the art and will not be described in detail herein.

Claims

1. A solar photovoltaic inverter, characterized by: comprises an inverter body (1) and a heat dissipation device (2) detachably connected to the rear side of the inverter body (1), wherein the heat dissipation device (2) comprises a shell (3) arranged on a wall surface and two centrifugal fans (4) arranged in the shell (3) in parallel, axial air inlets (5) of the two centrifugal fans (4) face the front side of the shell (3), tangential air outlets (6) of the two centrifugal fans (4) are arranged in opposite directions, a main air outlet (7) for respectively butting the tangential air outlets (6) of the two centrifugal fans (4) is formed in the left side wall and the right side wall of the shell (3), and an opening (8) for exposing the axial air inlets (5) of the two centrifugal fans (4) is formed in the front side of the shell (3);

the inverter body (1) comprises a shell (9), a main air inlet (10) formed in the left side wall and the right side wall of the shell (9), and two exhaust ports (11) formed in the rear side wall of the shell (9);

when the inverter body (1) is arranged at the front side of the heat dissipation device (2), the two exhaust ports (11) can be respectively abutted to the axial air inlets (5) of the two centrifugal fans (4); conversely, when the inverter body (1) is separated from the heat dissipation device (2), the two exhaust ports (11) can be separated from the corresponding axial air inlets (5);

a start-stop unit (18) is arranged on the upper side of the shell (3), a control unit (19) is coupled to the start-stop unit (18), and two centrifugal fans (4) are both coupled to and controlled by the control unit (19);

when the start-stop unit (18) responds to a single external trigger, the control unit (19) controls the two centrifugal fans (4) to run;

when the start-stop unit (18) responds to two continuous external triggers, the control unit (19) controls the two centrifugal fans (4) to stop;

the rear side wall of the shell (9) is provided with inserting rods (20) at two opposite angle positions, sleeves (21) for inserting the two inserting rods (20) are arranged in the opening (8) at the two opposite angle positions respectively, positioning pins (22) are arranged on the upper side wall of the upper sleeve (21) and the lower side wall of the lower sleeve (21) in a sliding manner, positioning holes (23) for inserting the positioning pins (22) are formed in the rod body of the inserting rods (20), and a first elastic driving assembly (24) is arranged on the sleeve (21) so that the positioning pins (22) have a trend of entering the inner cavity of the sleeve (21); when the whole inserted rod (20) is inserted into the sleeve (21), the first elastic driving assembly (24) drives the positioning pin (22) to be inserted into the positioning hole (23) so as to prevent the inserted rod (20) from being separated from the sleeve (21); a push rod (25) is arranged on one side of the sleeve (21) away from the inverter body (1) in a sliding way, and a second elastic driving assembly (26) is arranged on the sleeve (21) so that the push rod (25) has a tendency of pushing the inserted rod (20) out of the sleeve (21); when the positioning pin (22) is separated from the positioning hole (23) against the elastic force of the first elastic driving component (24) under the action of external force, the second elastic driving component (26) can drive the push rod (25) to extend to push the inserted rod (20) out of the sleeve (21), and the side wall of the push rod (25) can block the end part of the positioning pin (22) to prevent the positioning pin (22) from retreating under the action of the first elastic driving component (24);

the first elastic driving assembly (24) comprises a first guide sleeve (27) which is vertically arranged on the outer side wall of the sleeve (21) and is communicated with the inner cavity of the sleeve (21) so as to enable the locating pin (22) to slide and penetrate through, a first connecting rod (28) which is coaxially connected to the tail end of the locating pin (22), a first limiting plate (29) which is arranged on the port, far away from the sleeve (21), of the first guide sleeve (27) so as to prevent the locating pin (22) from separating from the first guide sleeve (27), and a first guide hole (30) which penetrates through the plate surface of the first limiting plate (29) so as to enable the first connecting rod (28) to slide and penetrate through, a first limiting piece (31) which is used for preventing the first connecting rod (28) from separating from the first guide hole (30) is arranged at the end part, far away from the locating pin (22), the outer diameter of the first connecting rod (28) is smaller than the outer diameter of the locating pin (22), a first pressure spring (32) is sleeved on the first connecting rod (28), and two ends of the first pressure spring (32) are respectively pressed against the opposite surfaces of the first limiting plate (29) and the locating pin (22);

the second elastic driving assembly (26) comprises a second guide sleeve (33) coaxially connected to the port, far away from the inverter body (1), of the sleeve (21) for the push rod (25) to slide and penetrate, a second connecting rod (34) coaxially connected to the end, far away from the inserted rod (20), of the push rod (25), a second limiting plate (35) arranged at the port, far away from the inverter body (1), of the second guide sleeve (33) for preventing the push rod (25) from separating from the second guide sleeve (33), and a second guide hole (36) penetrating through the surface of the second limiting plate (35) for the push rod (34) to slide and penetrate, a second limiting piece (37) for preventing the second connecting rod (34) from separating from the second guide hole (36) is arranged at the end, far away from the push rod (25), the outer diameter of the second connecting rod (34) is smaller than the outer diameter of the push rod (25), a second pressure spring (38) is sleeved on the second connecting rod (34), and two ends of the second pressure spring (38) are respectively pressed against the opposite surfaces of the second limiting plate (35) and the push rod (25);

when the whole inserted rod (20) is inserted into the sleeve (21), the push rod (25) and the second connecting rod (34) can retract to a state that the second limiting piece (37) is abutted against the inner side wall of the shell (3) under the back pushing action of the inserted rod (20); the plane of the first limiting piece (31) close to the sleeve (21) is provided with a proximity sensor (45) coupled with the control unit (19), the plane of the second limiting piece (37) far away from the second connecting rod (34) is provided with a micro switch (46) coupled with the control unit (19), the outer circumferential surface of the second limiting plate (35) is annularly provided with a first annular groove (47), a first annular electromagnet (48) is embedded in the first annular groove (47), the outer circumferential surface of the push rod (25) is annularly provided with a second annular groove (49) at a position close to the second connecting rod (34), the second annular groove (49) is embedded with a second annular electromagnet (50), and the end surfaces of the first annular electromagnet (48) and the second annular electromagnet (50) are oppositely arranged and are coupled and controlled by the control unit (19);

if and only if two proximity sensors (45) detect that the corresponding first limiting piece (31) is far away from the outer side wall of the corresponding sleeve (21) at the same time, the control unit (19) detects whether the second limiting piece (37) is abutted against the inner side wall of the shell (3) through the micro switch (46), if the second limiting piece (37) is abutted against the inner side wall of the shell (3), the control unit (19) controls the first annular electromagnet (48) and the second annular electromagnet (50) to operate so that repulsive force is generated between the first annular electromagnet (48) and the second annular electromagnet (50), and after the first annular electromagnet (48) and the second annular electromagnet (50) operate for a preset time period, the control unit (19) controls the first annular electromagnet (48) and the second annular electromagnet (50) to stop operating;

on the contrary, if the second limiting piece (37) is not abutted against the inner side wall of the shell (3), the control unit (19) does not control the first annular electromagnet (48) and the second annular electromagnet (50) to operate.

2. A solar photovoltaic inverter according to claim 1, characterized in that: the rear side wall of the shell (9) is provided with an elastic butt joint ring (12) along the edge ring of the air suction opening (11) for butt joint and pressing the edge of the axial air inlet (5).

3. A solar photovoltaic inverter according to claim 1, characterized in that: mounting plates (13) are arranged on two sides of the shell (3) and at positions close to the rear, and mounting holes (14) are formed in the mounting plates (13).

4. A solar photovoltaic inverter according to claim 1, characterized in that: a supporting plate (15) is arranged in the shell (3), a plurality of supporting columns (16) are arranged on the surface of the supporting plate (15), and the centrifugal fan (4) is fixed on the supporting columns (16) through screws (17).

5. A solar photovoltaic inverter according to claim 1, characterized in that: an upper connecting block (39) is arranged at the upper position of the inserted link (20) close to the end face of the push rod (25), a lower connecting block (40) is arranged at the lower position of the inserted link (25) close to the end face of the inserted link (20), and when the upper connecting block (39) and the lower connecting block (40) are in an upper and lower splicing state, the upper surface of the upper connecting block (39) is level with the upper part of the outer wall of the push rod (25); the lower surface of the upper connecting block (39) is provided with a clamping block (41), the upper surface of the lower connecting block (40) is provided with a clamping groove (42) for clamping the clamping block (41), the lower side of the clamping block (41) is extended with a plugging rod (43), and the bottom of the clamping groove (42) is provided with a plugging hole (44) for plugging the plugging rod (43).