Solar photovoltaic frequency converter

Abstract

The present invention belongs to the technical field of photovoltaic frequency converters. Disclosed is a solar photovoltaic frequency converter. The solar photovoltaic frequency converter comprises a frequency converter body, wherein side holes are respectively formed at the positions, close to the bottoms, on two opposite side faces of an inner side wall of the frequency converter body; filter screens are fixed to the inner side walls of the side holes; and blocking plates are respectively provided at positions close to the bottoms of the two opposite side faces in the frequency converter body. In the present invention, by means of providing a temperature sensor, the temperature when the frequency converter body internally catches fire can be detected by the temperature sensor, and is then transmitted to a PLC; and by means of providing a vacuum pump, air inside the frequency converter body can be pumped out, causing the interior of the frequency converter body to tend to be in a vacuum state, such that fire in the frequency converter body can be extinguished, and the situation in which the frequency converter body is burnt and damaged due to the fire inside the frequency converter body is prevented.

Description

A solar photovoltaic inverter Technical Field

[0001] The present invention belongs to the technical field of photovoltaic inverters, and in particular relates to a solar photovoltaic inverter. Background Art

[0002] Existing solar photovoltaic inverters usually have multiple highly integrated modules inside. When a module inside the inverter catches fire, it is easy to quickly cause the entire inverter to catch fire. Existing solar photovoltaic inverters do not have active fire extinguishing functions. When an open flame occurs inside the inverter, it is easy to cause the inverter to burn and be damaged.

[0003] Therefore, a solar photovoltaic inverter is needed to solve the problem that the solar photovoltaic inverter in the prior art does not have an active fire extinguishing function and is likely to burn and damage the inverter when an open fire occurs inside the inverter. Summary of the Invention

[0004] The object of the present invention is to provide a solar photovoltaic inverter to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a solar photovoltaic inverter, comprising an inverter body, side holes are respectively opened at the opposite sides of the inner wall of the inverter body near the bottom, a filter is fixed on the inner wall of the side hole, sealing plates are respectively provided on both sides of the inverter body near the bottom, four fixing sleeves are respectively fixed at the other two opposite sides of the inner wall of the inverter body near the bottom, two pushing rods are respectively fixed on one side close to each other, the pushing rods are correspondingly and movably engaged in the fixing sleeves, electric push rods are respectively fixed at the other two opposite sides of the inner wall of the inverter body near the bottom, a resistance frame cooperating with the push rod is fixed at the output end of the electric push rod, a temperature sensor is fixed at the top of one side of the inner wall of the inverter body, and a fire extinguishing assembly is provided at the bottom of one side of the outer wall of the inverter body.

[0006] Furthermore, the fire extinguishing assembly includes a vacuum pump, which is fixed to the bottom of a side surface of the outer wall of the inverter body. The input end of the vacuum pump is connected to the outer wall of the inverter body, and the output end of the vacuum pump is provided with an electromagnetic valve.

[0007] Furthermore, a PLC controller is fixed near the middle position on the other side of the outer wall of the inverter body, the two electric push rods are electrically connected to the PLC controller respectively, the temperature sensor is electrically connected to the PLC controller, and the electromagnetic valve and the vacuum pump are electrically connected to the PLC controller respectively.

[0008] Furthermore, two symmetrically distributed side rings are respectively provided at the bottom of the two opposite side surfaces of the outer side wall of the inverter body, a number of U-shaped frames distributed in a circular pattern are fixed between the outer side walls of the two side rings, a gear ring is rotatably connected between the two side rings, a scraping inclined plate is fixed on the inner side wall of the gear ring, and the scraping inclined plate is in contact with the surface of the filter screen.

[0009] Furthermore, a plurality of circumferentially distributed fixing blocks are fixed to a side surface of one of the side rings close to the inverter body, and one end of the fixing block is fixed to the outer side wall of the inverter body.

[0010] Furthermore, motors are fixed to the bottoms of two opposite side surfaces of the outer side wall of the inverter body respectively, and a gear is fixed to the output end of the motor, and the gear is meshed with the gear ring.

[0011] Furthermore, the motor is electrically connected to the PLC controller.

[0012] Furthermore, a rubber plate is fixed to a side of the blocking plate close to the filter screen.

[0013] Furthermore, four positioning columns are fixed on two opposite sides of the inner wall of the inverter body near the bottom, and the blocking plates are movably engaged with the outer walls of the four positioning columns. A frame is fixed at one end of the four positioning columns.

[0014] Furthermore, a spring is fixed between the two pushing rods that are close to each other on one side.

[0015] Compared with the prior art, the solar photovoltaic inverter provided by the present invention has at least the following beneficial effects:

[0016] (1) By setting the electric push rod, the push rods on both sides can be pushed to move when the resistance frame moves, and by setting the blocking plate, the side hole can be blocked, and by setting the rubber plate, the sealing performance between the blocking plate and the side hole can be better, and by setting the temperature sensor, the temperature when the inverter body is on fire can be detected by the temperature sensor and then transmitted to the PLC controller, and by setting the vacuum pump, the air inside the inverter body can be extracted, and then the interior of the inverter body tends to a vacuum state, so that the fire inside the inverter body can be extinguished, thereby avoiding the situation where the inverter body is burned and damaged when the inverter body is on fire.

[0017] (2) The side ring and the U-shaped frame are provided so that the position of the toothed ring can be movably limited. The toothed ring and the scraping inclined plate are provided so that the dust on the surface of the filter can be cleaned, thereby avoiding the clogging of the filter and the deterioration of the heat dissipation effect of the inverter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the overall structure of the present invention;

[0019] FIG2 is a schematic diagram of the structure of the electromagnetic valve of the present invention;

[0020] FIG3 is a schematic diagram of a cross-sectional structure of the main body of the present invention;

[0021] FIG4 is a schematic diagram of the push rod structure of the present invention;

[0022] FIG5 is a schematic diagram of the structure of the scraping inclined plate of the present invention.

[0023] In the picture:

[0024] 100, body; 101, side hole; 102, filter;

[0025] 200, positioning column; 201, blocking plate; 202, frame; 203, rubber plate;

[0026] 300, fixed sleeve; 301, push rod; 302, contact frame; 303, electric push rod; 304, spring;

[0027] 400, vacuum pump; 401, electromagnetic valve;

[0028] 500, side ring; 501, U-shaped frame; 502, gear ring;

[0029] 600, scraping inclined plate; 601, fixing block;

[0030] 700, temperature sensor;

[0031] 800, gear; 801, motor;

[0032] 900, PLC controller. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention. Example

[0034] The applicant has found that the existing technology has a problem that the solar photovoltaic inverter does not have an active fire extinguishing function. When an open fire occurs inside the inverter, it is easy to cause the inverter to burn and be damaged. To this end, Example 1 proposes a solar photovoltaic inverter, as shown in Figures 1-5. The solar photovoltaic inverter includes an inverter body 100. Side holes 101 are respectively opened on the two opposite side surfaces of the inner wall of the inverter body 100 near the bottom. A filter screen 102 is fixed on the inner wall of the side hole 101. Sealing plates 201 are respectively provided on both sides of the inner wall of the inverter body 100 near the bottom. Four fixing sleeves 300 are respectively fixed on the other two opposite side surfaces of the inner wall of the inverter body 100 near the bottom. The two fixing sleeves 300 are fixed on the inner wall of the inverter body 100. Two push rods 301 are fixed on one side of the blocking plate 201 close to each other, and the push rods 301 are correspondingly engaged in the fixed sleeve 300. Electric push rods 303 are fixed on the other two opposite sides of the inner wall of the inverter body 100 near the bottom. The output end of the electric push rod 303 is fixed with a resistance frame 302 that cooperates with the push rod 301. A temperature sensor 700 is fixed on the top of one side of the inner wall of the inverter body 100, and a fire extinguishing component is provided at the bottom of one side of the outer wall of the inverter body 100.

[0035] As a further solution of the present invention, the fire extinguishing assembly includes a vacuum pump 400, which is fixed to the bottom of a side of the outer wall of the inverter body 100. The input end of the vacuum pump 400 is connected to the outer wall of the inverter body 100, and the output end of the vacuum pump 400 is provided with an electromagnetic valve 401.

[0036] By setting the electromagnetic valve 401, the output end of the vacuum pump 400 can be opened and closed, thereby facilitating the control of the air circulation inside the inverter body 100. By setting the vacuum pump 400, the air inside the inverter body 100 can be extracted, so that the interior of the inverter body 100 tends to a vacuum state.

[0037] As a further solution of the present invention, a PLC controller 900 is fixed near the middle position of the other side surface of the outer wall of the inverter body 100, the two electric push rods 303 are electrically connected to the PLC controller 900, the temperature sensor 700 is electrically connected to the PLC controller 900, and the solenoid valve 401 and the vacuum pump 400 are electrically connected to the PLC controller 900.

[0038] The two electric push rods 303 can be started synchronously by the provided PLC controller 900 .

[0039] As a further solution of the present invention, two symmetrically distributed side rings 500 are respectively provided at the bottom of the two opposite side surfaces of the outer wall of the inverter body 100, and a number of U-shaped frames 501 distributed in a circular pattern are fixed between the outer walls of the two side rings 500. A toothed ring 502 is rotatably connected between the two side rings 500, and a scraping inclined plate 600 is fixed to the inner wall of the toothed ring 502, and the scraping inclined plate 600 is in contact with the surface of the filter 102.

[0040] By setting the side ring 500 and the U-shaped frame 501, the position of the toothed ring 502 can be supported first, and by setting the scraping inclined plate 600, the dust on the surface of the filter 102 can be scraped off, avoiding the clogging of the filter 102 and causing the heat dissipation effect of the inverter body 100 to deteriorate.

[0041] This solution has the following working process: when the inverter body 100 is extinguished, when a fire occurs inside the inverter body 100, the temperature sensor 700 detects the temperature inside the inverter body 100 and transmits the temperature data to the PLC controller 900. When the PLC controller 900 detects that the obtained temperature exceeds the preset temperature, the PLC controller 900 controls the two electric push rods 303 to start synchronously. The electric push rods 303 move to push the contact frame 302 to move. The contact frame 302 moves to push the push rods 301 on both sides to move. The push rods 301 move to move the blocking plate 201 to block the side hole 101. Then the PLC controller 900 controls the electromagnetic valve 401 to open and controls the vacuum pump 401 to open. 0 is started, the vacuum pump 400 extracts the air inside the inverter body 100, making the interior of the inverter body 100 tend to a vacuum state. At this time, there is no oxygen inside the inverter body 100, and the fire inside the inverter body 100 is extinguished. Then the vacuum pump 400 and the electromagnetic valve 401 are closed in sequence. Thereafter, the PLC controller 900 controls the electric push rod 303 to move upward, and the spring 304 pulls the push rods 301 on both sides to separate the sealing plate 201 from the side hole 101, and the side hole 101 is opened. At this time, due to the pressure difference between the inside and the outside of the inverter body 100, air quickly enters the interior of the inverter body 100. When the air flow rate is high, the temperature inside the inverter body 100 is reduced and restored to normal.

[0042] When cleaning the filter 102, operate the PLC controller 900, the PLC controller 900 controls the motor 801 to start, the motor 801 rotates to drive the gear 800 to rotate, the gear 800 rotates to drive the gear ring 502 to rotate, the gear ring 502 rotates to drive the scraping inclined plate 600 to rotate, the scraping inclined plate 600 rotates so that the dust on the surface of the filter 102 is scraped and cleaned.

[0043] According to the above working process, it can be known that: through the provision of the electric push rod 303, the push rods 301 on both sides can be pushed to move when the resistance frame 302 moves, and the side hole 101 can be blocked by the provision of the sealing plate 201, and the sealing performance between the sealing plate 201 and the side hole 101 is better by the provision of the rubber plate 203, and the temperature sensor 700 when the inverter body 100 is on fire can be detected by the temperature sensor 700 and then transmitted to the PLC controller 900, and the vacuum pump 400 is provided to allow the air inside the inverter body 100 to be extracted, and then the interior of the inverter body 100 tends to a vacuum state, so that the fire inside the inverter body 100 can be extinguished, thereby avoiding the situation where the inverter body 100 is burned and damaged when the inverter body 100 is on fire.

[0044] By means of the side ring 500 and the U-shaped frame 501, the position of the toothed ring 502 can be movably limited. By means of the toothed ring 502 and the scraping inclined plate 600, the dust on the surface of the filter 102 can be cleaned, thereby avoiding clogging of the filter 102 and causing the heat dissipation effect of the inverter body 100 to deteriorate.

[0045] As a further solution of the present invention, a plurality of circumferentially distributed fixing blocks 601 are fixed to one side of the side ring 500 close to the inverter body 100 , and one end of the fixing block 601 is fixed to the outer wall of the inverter body 100 .

[0046] By providing the fixing block 601 , the position of the side ring 500 can be fixed, thereby limiting the position of the gear ring 502 .

[0047] As a further solution of the present invention, motors 801 are fixed to the bottoms of two opposite side surfaces of the outer side wall of the inverter body 100 , and a gear 800 is fixed to the output end of the motor 801 . The gear 800 is meshed with the gear ring 502 .

[0048] The motor 801 and the gear 800 are provided to enable the gear ring 502 to rotate, thereby enabling the scraping inclined plate 600 to scrape and clean the dust on the surface of the filter 102 .

[0049] As a further solution of the present invention, the motor 801 is electrically connected to the PLC controller 900 .

[0050] By setting up the PLC controller 900, the start-up of the motor 801 can be controlled, thereby facilitating the cleaning of dust on the surface of the filter 102.

[0051] As a further solution of the present invention, a rubber plate 203 is fixed to a side of the blocking plate 201 close to the filter screen 102 .

[0052] The rubber plate 203 is provided to provide a better sealing effect between the blocking plate 201 and the side hole 101 .

[0053] As a further solution of the present invention, four positioning columns 200 are fixed on the opposite sides of the inner wall of the inverter body 100 near the bottom, and the blocking plate 201 is correspondingly engaged with the outer walls of the four positioning columns 200, and a frame 202 is fixed at one end of the four positioning columns 200.

[0054] By providing the positioning posts 200 , the position of the blocking plate 201 can be movably limited, thereby facilitating the movement of the blocking plate 201 .

[0055] As a further solution of the present invention, a spring 304 is fixed between two sides of the push rods 301 that are close to each other.

[0056] By providing the spring 304 , when the side hole 101 needs to be opened, after the output end of the electric push rod 303 moves upward, the spring 304 can pull the two push rods 301 closer to each other, so that the side hole 101 is opened.

[0057] In summary: when the inverter body 100 is extinguished, when a fire occurs inside the inverter body 100, the temperature sensor 700 detects the temperature inside the inverter body 100 and transmits the temperature data to the PLC controller 900. When the PLC controller 900 detects that the obtained temperature exceeds the preset temperature, the PLC controller 900 controls the two electric push rods 303 to start synchronously. The electric push rods 303 move to push the contact frame 302 to move. The contact frame 302 moves to push the push rods 301 on both sides to move. The push rods 301 move to move the blocking plate 201 to block the side hole 101. Then the PLC controller 900 controls the electromagnetic valve 401 to open and controls the vacuum pump 400 to start. The vacuum pump 400 extracts the air inside the inverter body 100, making the interior of the inverter body 100 tend to a vacuum state. At this time, there is no oxygen inside the inverter body 100, and the fire extinguishing inside the inverter body 100 is completed. Then the vacuum pump 400 and the electromagnetic valve 401 are closed in sequence. Thereafter, the PLC controller 900 controls the electric push rod 303 to move upward, and the spring 304 pulls the push rods 301 on both sides to separate the sealing plate 201 from the side hole 101, and the side hole 101 is opened. At this time, due to the pressure difference between the inside and outside of the inverter body 100, air quickly enters the interior of the inverter body 100. When the air flow rate is high, the temperature inside the inverter body 100 is reduced and restored to normal.

[0058] When cleaning the filter 102, operate the PLC controller 900, the PLC controller 900 controls the motor 801 to start, the motor 801 rotates to drive the gear 800 to rotate, the gear 800 rotates to drive the gear ring 502 to rotate, the gear ring 502 rotates to drive the scraping inclined plate 600 to rotate, the scraping inclined plate 600 rotates so that the dust on the surface of the filter 102 is scraped and cleaned.

[0059] The inverter body 100, electric push rod 303, PLC controller 900, vacuum pump 400, electromagnetic valve 401, temperature sensor 700 and motor 801 can all be purchased on the market. They are mature technologies in this field and have been fully disclosed, so they are not repeated in the specification.

[0060] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A solar photovoltaic inverter, comprising an inverter body (100), characterized in that: Side holes (101) are respectively provided on two opposing side surfaces of the inner wall of the inverter body (100) near the bottom, a filter screen (102) is fixed to the inner wall of the side hole (101), blocking plates (201) are respectively provided on two sides of the inner wall of the inverter body (100) near the bottom, four fixing sleeves (300) are respectively fixed on the other two opposing side surfaces of the inner wall of the inverter body (100) near the bottom, and two push rods (301) are respectively fixed on one side of the two blocking plates (201) close to each other. The push rod (301) is correspondingly engaged in the fixing sleeve (300), and electric push rods (303) are respectively fixed to the other two opposite side surfaces of the inner wall of the inverter body (100) near the bottom, and an abutment frame (302) matching the push rod (301) is fixed to the output end of the electric push rod (303), a temperature sensor (700) is fixed to the top of one side of the inner wall of the inverter body (100), and a fire extinguishing component is arranged at the bottom of one side of the outer wall of the inverter body (100).

2. A solar photovoltaic inverter according to claim 1, characterized in that: The fire extinguishing assembly comprises a vacuum pump (400), the vacuum pump (400) being fixed to the bottom of a side surface of an outer wall of the inverter body (100), the input end of the vacuum pump (400) being connected to the outer wall of the inverter body (100), and the output end of the vacuum pump (400) being provided with an electromagnetic valve (401).

3. A solar photovoltaic inverter according to claim 2, characterized in that: A PLC controller (900) is fixed to the other side surface of the outer wall of the inverter body (100) near the middle position, the two electric push rods (303) are electrically connected to the PLC controller (900), the temperature sensor (700) is electrically connected to the PLC controller (900), and the electromagnetic valve (401) and the vacuum pump (400) are electrically connected to the PLC controller (900).

4. A solar photovoltaic inverter according to claim 3, characterized in that: Two symmetrically distributed side rings (500) are respectively arranged at the bottom of two opposite side surfaces of the outer wall of the inverter body (100); a plurality of U-shaped frames (501) distributed in a circumference are fixed between the outer walls of the two side rings (500); a toothed ring (502) is rotatably connected between the two side rings (500); a scraping inclined plate (600) is fixed to the inner wall of the toothed ring (502); and the scraping inclined plate (600) is in contact with the surface of the filter screen (102).

5. A solar photovoltaic inverter according to claim 4, characterized in that: A plurality of fixing blocks (601) distributed in a circumference are fixed to one side of one of the side rings (500) close to the inverter body (100), and one end of the fixing block (601) is fixed to the outer side wall of the inverter body (100).

6. A solar photovoltaic inverter according to claim 5, characterized in that: Motors (801) are fixed to the bottoms of two opposite side surfaces of the outer side wall of the inverter body (100), respectively, and a gear (800) is fixed to the output end of the motor (801), and the gear (800) is meshed with the toothed ring (502).

7. A solar photovoltaic inverter according to claim 6, characterized in that: The motor (801) is electrically connected to the PLC controller (900).

8. A solar photovoltaic inverter according to claim 7, characterized in that: A rubber plate (203) is fixed to a side of the blocking plate (201) close to the filter screen (102).

9. A solar photovoltaic inverter according to claim 8, characterized in that: Four positioning columns (200) are respectively fixed on two opposite side surfaces of the inner wall of the inverter body (100) near the bottom, the blocking plate (201) is correspondingly movably engaged on the outer walls of the four positioning columns (200), and a frame (202) is fixed at one end of the four positioning columns (200).

10. A solar photovoltaic inverter according to claim 9, characterized in that: A spring (304) is fixed between the two push rods (301) on the sides close to each other.

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