CN213367717U

CN213367717U - Photovoltaic inverter based on low-temperature overvoltage protection technology

Info

Publication number: CN213367717U
Application number: CN202022377980.0U
Authority: CN
Inventors: 朱佳晨; 李源
Original assignee: Fengdexin Power Development Co ltd
Current assignee: Fengdexin Power Development Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-06-04
Anticipated expiration: 2030-10-22

Abstract

The utility model provides a photovoltaic inverter based on low temperature overvoltage protection technique, the power distribution box comprises a box body, the bottom half surface is seted up flutedly, recess bottom export internal fixation is equipped with the filter screen, the filter screen top is equipped with the fan, the fixed stock that is equipped with in fan bottom, the stock runs through the filter screen and extends to the filter screen bottom outside, the fixed brush board that is equipped with in stock one side, the fixed brush that is equipped with in brush board top, the brush contacts with the filter screen, the box inner wall surface all fixes and is equipped with the heat-conducting plate, fan top and heat-conducting plate fixed connection. The utility model discloses a set up the recess bottom half, install the fan in the recess, fan and heat-conducting plate cooperation dispel the heat in to the box, compare with prior art, the radiating effect improves greatly to when can preventing to rain, in the rainwater enters into the box, cause the damage to the component in the box.

Description

Photovoltaic inverter based on low-temperature overvoltage protection technology

Technical Field

The utility model relates to a photovoltaic inverter field, concretely relates to photovoltaic inverter based on low temperature overvoltage protection technique.

Background

The inverter is also called a power supply regulator, and can be divided into an independent power supply and a grid connection according to the application of the inverter in a photovoltaic power generation system. According to the waveform modulation mode, the inverter can be divided into a square wave inverter, a step wave inverter, a sine wave inverter and a combined three-phase inverter. The existing inverter has the defects of high cost and poor heat dissipation effect, so that the best effect on heat emission is difficult to achieve.

Chinese patent with publication number CN207603467U discloses a novel box-type photovoltaic inverter, through enclosing the inside component of dc-to-ac converter with the heat dissipation pipeline, and with the heat transfer of inside component to the heat dissipation pipeline on, the inside packing of heat dissipation pipeline has the ethylene glycol coolant liquid, and through singlechip intelligent control water pump, make the inside ethylene glycol coolant liquid of heat dissipation pipeline carry out circulation flow, when the high temperature, temperature sensor will detect temperature information, and with temperature information transfer to the singlechip, singlechip control water pump and radiator fan start, realize the cooling through the circulation that accelerates the ethylene glycol coolant liquid and the mode of inside circulation of air.

The prior art has the following defects: the fan is arranged on one side of the box body, and when raining, rainwater easily enters the box body from the outlet of the heat dissipation fan to damage electrical elements.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a photovoltaic inverter based on low temperature overvoltage protection technique through set up the recess at the bottom half, installs the fan in the recess, and fan and heat-conducting plate cooperation are dispelled the heat in to the box, compare with prior art, and the radiating effect improves greatly to when can preventing to rain, the rainwater enters into the box in, causes the damage to the component in the box.

In order to achieve the above object, the present invention provides the following technical solutions: a photovoltaic inverter based on low-temperature overvoltage protection technology comprises a box body, wherein a groove is formed in the surface of the bottom of the box body, a filter screen is fixedly arranged in an outlet at the bottom of the groove, a fan is arranged at the top of the filter screen, a long rod is fixedly arranged at the bottom of the fan and penetrates through the filter screen to extend to the outer side of the bottom of the filter screen, a brush plate is fixedly arranged on one side of the long rod, a brush is fixedly arranged at the top of the brush plate and is in contact with the filter screen, a heat-conducting plate is fixedly arranged on the surface of the inner wall of the box body, the top of the fan is fixedly connected with the heat-conducting plate, a plurality of air holes are formed in the surface of the bottom of the heat-conducting plate and are communicated with the groove, a heat-radiating, one of them backup pad is established at another backup pad top, and one of them backup pad top is fixed and is equipped with arrester and overvoltage protector, and another backup pad top is fixed and is equipped with three-phase inverter bridge, current sensor, overload protection ware and reactor.

Further, the infusion assembly comprises a liquid storage tank, a water pump is arranged on one side of the liquid storage tank, and water pipes are fixedly communicated between the water pump and the liquid storage tank, between the water inlet of the heat dissipation pipeline and the water pump, and between the water outlet of the heat dissipation pipeline and the liquid storage tank.

Furthermore, a liquid adding pipe is fixedly arranged at the top of the liquid storage tank, and a threaded cover is connected to the top of the liquid adding pipe in a threaded manner.

Further, the fixed mounting panel that is equipped with in stock solution tank bottom and water pump bottom, be equipped with a plurality of screws on the mounting panel, the mounting panel passes through the screw and can dismantle with the heat-conducting plate and be connected.

Further, the box front side is equipped with the door, the fixed singlechip and the alarm of being equipped with of door inner wall, the singlechip respectively with water pump and fan electric connection, the alarm respectively with overvoltage protector and overload protection ware electric connection.

Furthermore, a plurality of air outlets are formed in the bottom surfaces of the two supporting plates, and the supporting plates are made of heat-conducting silica gel materials.

Furthermore, four corners of the bottom of the box body are fixedly provided with supporting legs.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a set up the recess bottom the box, install the fan in the recess, fan and heat-conducting plate cooperate and dispel the heat in the box, compare with prior art, the radiating effect improves greatly to when can prevent to rain, the rainwater enters into the box, causes the damage to the component in the box;

2. through the stock that the fan bottom set up, it is rotatory to drive the stock when the fan rotates, and the stock drives the brush on the brush board and clears up the filter screen, and the dust impurity of clearance is blown away by the wind that the fan blew off, prevents to be stained with dust impurity on the filter screen, influences the heat dissipation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a front view of the overall structure of the door according to the present invention;

fig. 2 is a front view of the overall structure of the door provided by the present invention when opened;

fig. 3 is a cross-sectional view of the overall structure provided by the present invention;

fig. 4 is a perspective view of the heat-conducting plate provided by the present invention;

fig. 5 is an enlarged view of a portion a of fig. 3 according to the present invention;

in the figure: 1. a box body; 2. a groove; 3. a filter screen; 4. a fan; 5. a long rod; 6. brushing the board; 7. a brush; 8. a heat conducting plate; 9. a vent hole; 10. a heat dissipation pipe; 11. a support plate; 12. a lightning arrester; 13. an overvoltage protector; 14. a three-phase inverter bridge; 15. a current sensor; 16. an overload protector; 17. a reactor; 18. a liquid storage tank; 19. a water pump; 20. a water pipe; 21. a liquid feeding pipe; 22. a threaded cap; 23. mounting a plate; 24. a screw; 25. a door; 26. a single chip microcomputer; 27. an alarm; 28. and an air outlet.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawings 1-5 of the specification, the photovoltaic inverter based on the low-temperature overvoltage protection technology comprises a box body 1, a groove 2 is formed in the surface of the bottom of the box body 1, a filter screen 3 is fixedly arranged in an outlet at the bottom of the groove 2, a fan 4 is arranged at the top of the filter screen 3, a long rod 5 is fixedly arranged at the bottom of the fan 4, the long rod 5 penetrates through the filter screen 3 and extends to the outer side of the bottom of the filter screen 3, a brush plate 6 is fixedly arranged on one side of the long rod 5, a brush 7 is fixedly arranged at the top of the brush plate 6, the brush 7 is in contact with the filter screen 3, a heat-conducting plate 8 is fixedly arranged on the surface of the inner wall of the box body 1, the top of the fan 4 is fixedly connected with the heat-conducting plate 8, a plurality of vent, the bottom of the inner cavity of the heat conducting plate 8 is fixedly provided with an infusion assembly, the top of the infusion assembly is provided with two supporting plates 11, the two supporting plates 11 are fixedly connected with the inner wall of the box body 1, one of the supporting plates 11 is arranged on the top of the other supporting plate 11, the top of one of the supporting plates 11 is fixedly provided with a lightning arrester 12 and an overvoltage protector 13, and the top of the other supporting plate 11 is fixedly provided with a three-phase inverter bridge 14, a current sensor 15, an overload protector 16 and a reactor 17.

Further, the infusion assembly comprises a liquid storage tank 18, a water pump 19 is arranged on one side of the liquid storage tank 18, water pipes 20 are fixedly communicated between the water pump 19 and the liquid storage tank 18, between a water inlet of the heat dissipation pipeline 10 and the water pump 19, and between a water outlet of the heat dissipation pipeline 10 and the liquid storage tank 18, and cooling liquid is conveyed into the heat dissipation pipeline 10 in the heat conduction plate 8 from the liquid storage tank 18 through the water pump 19 for circulating cooling, so that the heat dissipation effect is improved.

Further, a liquid adding pipe 21 is fixedly arranged at the top of the liquid storage tank 18, a threaded cover 22 is connected to the top of the liquid adding pipe 21 in a threaded mode, and cooling liquid can be added into or discharged from the liquid storage tank 18.

Further, the fixed mounting panel 23 that is equipped with in liquid storage pot 18 bottom and water pump 19 bottom, be equipped with a plurality of screws 24 on the mounting panel 23, the mounting panel 23 can be dismantled with heat-conducting plate 8 through screw 24 and be connected, makes things convenient for operating personnel to install and dismantles liquid storage pot 18 and water pump 19, overhauls.

Further, the front side of the box body 1 is provided with a door 25, the inner wall of the door 25 is fixedly provided with a single chip microcomputer 26 and an alarm 27, the single chip microcomputer 26 is respectively electrically connected with the water pump 19 and the fan 4, the alarm 27 is respectively electrically connected with the overvoltage protector 13 and the overload protector 16, the single chip microcomputer 26 of which the model is M68HC16 is used for controlling the operation of the fan 4 and the water pump 19, and the overvoltage protector 13 of which the model is EM-001A and the overload protector 16 of which the model is 88-15A protect elements.

Furthermore, a plurality of air outlets 28 are formed in the bottom surfaces of the two support plates 11, and the support plates 11 are made of a heat-conducting silica gel material, so that heat generated by the elements can be rapidly extracted by the fan 4.

Furthermore, four corners of the bottom of the box body 1 are fixedly provided with supporting legs for supporting the whole device.

The utility model discloses the theory of operation:

referring to the attached drawings 1-5 of the specification, when in use, the elements in the box body 1 transmit heat to the heat conducting plate 8, the water pump 19 is turned on, the water pump 19 pumps out the cooling liquid in the liquid storage tank 18 and conveys the cooling liquid to the heat radiating pipeline 10 in the heat conducting plate 8, the cooling liquid flows in the heat conducting plate 8 and then flows into the liquid storage tank 18 from the water outlet of the heat radiating pipeline 10 to carry out circulating cooling, the fan 4 rotates to pump out the heat in the box body 1 and radiate the heat in the box body 1, the matching of the fan 4 and the heat conducting plate 8 is utilized to ensure that the heat radiating effect in the box body 1 is better, the fan 4 is arranged at the bottom of the box body 1 and can prevent rainwater from entering, when raining, the fan 4 rotates to drive the long rod 5 to rotate, the long rod 5 rotates to drive the brush plate 6 to rotate, the brush 7 on the brush plate 6 cleans the filter screen 3 in the groove 2, prevent to be stained with dust impurity on the filter screen 3, influence the heat dissipation, through arrester 12 and overvoltage protector 13 that set up in backup pad 11, current sensor 15 and overload protection ware 16, when the voltage exceedes 220V or when the short circuit takes place for internal component, the component sends information for alarm 27, and alarm 27 sends the police dispatch newspaper, and the notice staff overhauls the component. The installation plate 23 arranged at the bottom of the liquid storage tank 18 and the water pump 19 is convenient for operators to install and disassemble the liquid storage tank 18 and the water pump 19 for overhauling.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a photovoltaic inverter based on low temperature overvoltage protection technique, includes box (1), its characterized in that: the box body (1) is provided with a groove (2) on the bottom surface, a filter screen (3) is fixedly arranged in an outlet at the bottom of the groove (2), a fan (4) is arranged at the top of the filter screen (3), a long rod (5) is fixedly arranged at the bottom of the fan (4), the long rod (5) penetrates through the filter screen (3) and extends to the outer side of the bottom of the filter screen (3), a brush plate (6) is fixedly arranged on one side of the long rod (5), a brush (7) is fixedly arranged at the top of the brush plate (6), the brush (7) is contacted with the filter screen (3), a heat-conducting plate (8) is fixedly arranged on the inner wall surface of the box body (1), the top of the fan (4) is fixedly connected with the heat-conducting plate (8), a plurality of air holes (9) are formed in the bottom surface of the heat-conducting plate (8), the, the heat-conducting plate (8) inner chamber bottom is fixed and is equipped with the infusion subassembly, the infusion subassembly top is equipped with two backup pads (11), two backup pads (11) all with box (1) inner wall fixed connection, establish at another backup pad (11) top in one of them backup pad (11), fixed arrester (12) and overvoltage protector (13) of being equipped with in one of them backup pad (11) top, fixed three-phase contravariant bridge (14), current sensor (15), overload protector (16) and reactor (17) of being equipped with in another backup pad (11) top.

2. The photovoltaic inverter based on the low-temperature overvoltage protection technology as claimed in claim 1, wherein: the infusion assembly comprises a liquid storage tank (18), a water pump (19) is arranged on one side of the liquid storage tank (18), and water pipes (20) are fixedly communicated between the water pump (19) and the liquid storage tank (18), between a water inlet of the heat dissipation pipeline (10) and the water pump (19), and between a water outlet of the heat dissipation pipeline (10) and the liquid storage tank (18).

3. The photovoltaic inverter based on the low-temperature overvoltage protection technology as claimed in claim 2, wherein: the top of the liquid storage tank (18) is fixedly provided with a liquid adding pipe (21), and the top of the liquid adding pipe (21) is in threaded connection with a threaded cover (22).

4. The photovoltaic inverter based on the low-temperature overvoltage protection technology as claimed in claim 3, wherein: liquid storage pot (18) bottom and water pump (19) bottom are fixed and are equipped with mounting panel (23), be equipped with a plurality of screws (24) on mounting panel (23), mounting panel (23) are connected through screw (24) and heat-conducting plate (8) can dismantle.

5. The photovoltaic inverter based on the low-temperature overvoltage protection technology as claimed in claim 1, wherein: the box (1) front side is equipped with door (25), door (25) inner wall is fixed and is equipped with singlechip (26) and alarm (27), singlechip (26) respectively with water pump (19) and fan (4) electric connection, alarm (27) respectively with overvoltage protector (13) and overload protection ware (16) electric connection.

6. The photovoltaic inverter based on the low-temperature overvoltage protection technology as claimed in claim 1, wherein: a plurality of air outlet holes (28) are formed in the bottom surfaces of the two supporting plates (11), and the supporting plates (11) are made of heat-conducting silica gel materials.

7. The photovoltaic inverter based on the low-temperature overvoltage protection technology as claimed in claim 1, wherein: supporting legs are fixedly arranged at four corners of the bottom of the box body (1).