Inverter protection device and photovoltaic inverter thereof

Abstract

The invention discloses an inverter protection device and a photovoltaic inverter thereof, and relates to the technical field of photovoltaic inverters, and the inverter protection device comprises a protection unit which comprises a cabinet body, a switch assembly rotationally arranged on the cabinet body, a fire extinguishing maintenance assembly arranged on the switch assembly, and air outlets formed in the two sides of the cabinet body, the alarm is arranged at the top of the cabinet body; the fixed mounting unit comprises a fixed buffer assembly arranged in the cabinet body; and the photovoltaic unit comprises a photovoltaic inverter assembly arranged at the top of the fixed buffer assembly. The cabinet body is designed to comprehensively protect the photovoltaic unit and prevent human touch and animal impact, has buffering and stabilizing functions, is internally provided with a temperature sensing detector to monitor line abnormity, can automatically spray out a fire extinguishing agent when a fire occurs, and uses a heat insulation layer to isolate flames, and during maintenance, a photovoltaic inverter is conveyed to an operator through a moving assembly, so that the photovoltaic inverter can be conveniently and rapidly operated. And maintenance and inspection are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic inverters, and in particular to an inverter protection device and a photovoltaic inverter thereof. Background Art

[0002] PV inverters are photovoltaic inverters that convert the variable DC voltage generated by photovoltaic solar panels into AC power at the mains frequency, which can be fed back into the commercial power transmission system.

[0003] At present, most photovoltaic plants in mountainous areas are close to villages. Local villagers have been grazing in photovoltaic areas for a long time. They will open or close the DC side incoming line switch or pull the DC side incoming cable. The DC side switch of the inverter is often turned off unplanned, increasing the workload of operation and maintenance personnel. Secondly, livestock and animals will also use their bodies to remove itching on the lower end of the inverter or on the cable tray with horn-top equipment. The single insulating sleeve outside the AC side outgoing cable is easily deformed when rubbed by cattle and sheep. The cable will also fall off, causing arcing, which instantly generates a high temperature of more than 2,000 degrees, igniting trees in the photovoltaic area, thus leading to fire. Summary of the invention

[0004] In view of the above problems existing in the existing inverter protection device, the present invention is proposed.

[0005] Therefore, the present invention provides an inverter protection device, the purpose of which is to solve the problem that children are very curious about the equipment and will open or close the DC side incoming line switch or pull the DC side incoming line cable, increasing the workload of the operation and maintenance personnel; secondly, the single insulating sleeve outside the cable is easily deformed when rubbed by cattle and sheep, and the cable may fall off, causing arcing and instantaneously generating a high temperature of more than 2,000 degrees, causing the trees in the photovoltaic field to be ignited, thereby causing a fire.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a protection unit, comprising a cabinet, a switch assembly rotatably arranged on the cabinet, a fire extinguishing inspection assembly arranged on the switch assembly, exhaust vents arranged on both sides of the cabinet, and an alarm arranged on the top of the cabinet;

[0007] A fixed installation unit, comprising a fixed buffer assembly arranged inside the cabinet;

[0008] The photovoltaic unit comprises a photovoltaic inverter assembly arranged on the top of the fixed buffer assembly.

[0009] As a preferred solution of the inverter protection device described in the present invention, the switch assembly includes a rotation limit shaft rotatably arranged inside the cabinet, a photovoltaic panel arranged at one end of the rotation limit shaft, an insulation layer arranged inside the photovoltaic panel, a linkage rod arranged on both sides of the photovoltaic panel, and a limiting rotating shaft arranged on the linkage rod, and the limiting rotating shaft is connected to the fire extinguishing and maintenance assembly.

[0010] As a preferred solution of the inverter protection device described in the present invention, the fire extinguishing and maintenance assembly includes an electric push rod arranged inside the cabinet, a fire extinguishing agent tank arranged at the output end of the electric push rod, a delivery pipe arranged at the top of the fire extinguishing agent tank, and a spray plate arranged at the other end of the delivery pipe.

[0011] As a preferred solution of the inverter protection device described in the present invention, fixing rods are provided on both sides of the fire extinguishing agent tank, and the tops of the fixing rods are connected to the spray plates.

[0012] As a preferred solution of an inverter protection device described in the present invention, the fixed buffer assembly includes a base plate arranged inside the cabinet, a buffer rod arranged inside the base plate, and a limit block slidably arranged on the outer diameter of the buffer rod, and the limit block is slidably connected to the bottom of the cabinet.

[0013] As a preferred solution of the inverter protection device described in the present invention, a reset spring is arranged inside the limit block, a fixed block is arranged on the top of the reset spring, a movable card strip is arranged at the front end of the fixed block, and the movable card strip is connected to the bottom plate.

[0014] In view of the above problems existing in the existing photovoltaic inverter, the present invention is proposed.

[0015] Therefore, the present invention provides a photovoltaic inverter, the purpose of which is to solve the problem that a fire cannot be caused and extinguished in time when an abnormal limit occurs inside the photovoltaic inverter.

[0016] To solve the above technical problems, the present invention provides the following technical solution: the photovoltaic inverter assembly includes a connecting block arranged inside the fixing block, a supporting base arranged on the top of the connecting block, and an inverter body arranged on the top of the supporting base.

[0017] As a preferred solution of the photovoltaic inverter described in the present invention, an inverter module is arranged inside the inverter body.

[0018] As a preferred solution of the photovoltaic inverter described in the present invention, a cabinet door is provided inside the inverter body.

[0019] As a preferred solution of the photovoltaic inverter of the present invention, a temperature detector is arranged inside the inverter body, and the temperature detector is electrically connected to the fire extinguishing agent tank.

[0020] The beneficial effects of the present invention are as follows: the cabinet is designed to fully protect the photovoltaic unit, prevent human touch and animal impact, has buffering and stabilizing functions, is equipped with a temperature sensor to monitor line abnormalities, can automatically spray fire extinguishing agent when a fire occurs, and use a heat insulation layer to isolate the flame. During maintenance, the photovoltaic inverter is transported to the operator through mobile components for easy maintenance and inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The figure is a schematic diagram of the internal structure of an inverter protection device of the present invention.

[0023] Figure 2 The figure is a side cross-sectional internal structure diagram of an inverter protection device of the present invention.

[0024] Figure 3 The figure is a schematic side cross-sectional structural diagram of an inverter protection device of the present invention.

[0025] Figure 4 The present invention is an inverter protection device Figure 3 Enlarged structural diagram at A in the middle.

[0026] Figure 5 The present invention is a schematic diagram of the structure of a fixed buffer component of an inverter protection device.

[0027] Figure 6 The present invention is a schematic diagram of the structure of a switch component of an inverter protection device.

[0028] Figure 7 The figure is a schematic diagram of the internal structure of a photovoltaic inverter according to the present invention.

[0029] Figure 8 The present invention is an overall structural schematic diagram of an inverter protection device and a photovoltaic inverter thereof. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0034] Example 1, reference Figure 1 - Figure 6 , which is the first embodiment of the present invention, provides an inverter protection device, the device comprising: a protection unit 100, including a cabinet 101, a switch assembly 102 rotatably arranged on the cabinet 101, a fire extinguishing and maintenance assembly 103 arranged on the switch assembly 102, exhaust ports 104 arranged on both sides of the cabinet 101, and an alarm 105 arranged on the top of the cabinet 101, the cabinet 101 can be sealed and opened by the switch assembly 102, so as to protect the photovoltaic inverter assembly 301 inside, and the photovoltaic inverter assembly 301 is exhausted through the exhaust ports 104 on the cabinet 101;

[0035] The fixed installation unit 200 includes a fixed buffer assembly 201 disposed inside the cabinet 101. The photovoltaic inverter assembly 301 is fixedly installed by the fixed installation unit 200, so that the photovoltaic inverter assembly 301 can be stably installed inside the cabinet 101;

[0036] The photovoltaic unit 300 includes a photovoltaic inverter assembly 301 disposed on the top of a fixed buffer assembly 201. The fixed buffer assembly 201 connected to the bottom of the photovoltaic inverter assembly 301 can buffer and stabilize the photovoltaic inverter assembly 301 when the photovoltaic inverter assembly 301 is impacted.

[0037] Among them, the switch component 102 includes a rotation limit shaft 102c rotatably arranged inside the cabinet 101, a photovoltaic panel 102a arranged at one end of the rotation limit shaft 102c, an insulation layer 102b arranged inside the photovoltaic panel 102a, a linkage rod 102d arranged on both sides of the photovoltaic panel 102a, and a limiting rotation shaft 102e arranged on the linkage rod 102d, and the limiting rotation shaft 102e is connected to the fire extinguishing maintenance component 103, the switch component 102 can be rotationally limited by rotating the limit shaft 102c, energy can be collected by the photovoltaic panel 102a, and the insulation layer 102b can insulate the interior, and the switch component 102 is connected to the fire extinguishing maintenance component 103, so that when the fire extinguishing maintenance component 103 moves, the switch component 102 also moves together to open and close.

[0038] Furthermore, the fire extinguishing and maintenance component 103 includes an electric push rod 103a arranged inside the cabinet 101, a fire extinguishing agent box 103b arranged at the output end of the electric push rod 103a, a delivery pipe 103c arranged at the top of the fire extinguishing agent box 103b, and a spray plate 103d arranged at the other end of the delivery pipe 103c. When a fire occurs inside the cabinet 101, the photovoltaic inverter component 301 can be sprayed and extinguished through the fire extinguishing agent box 103b.

[0039] Furthermore, fixing rods 103e are provided on both sides of the fire extinguishing agent box 103b, and the top of the fixing rods 103e is connected to the spray plate 103d, so that the fire extinguishing agent box 103b and the spray plate 103d on the top of the fire extinguishing agent box 103b are supported and fixed by the fixing rods 103e.

[0040] During use, when the inverter is inspected and opened, the delivery pipe 103c starts to work to push the fire extinguisher box 103b and the photovoltaic inverter assembly 301 forward as a whole, and at the same time, the fire extinguisher box 103b moves while the fixed rod 103e also starts to move, and the movement of the fixed rod 103e drives the limiting shaft 102e and the linkage rod 102d on the fixed rod 103e to move, so that the photovoltaic panel 102a connected to the linkage rod 102d also moves, and at the same time, the rotation limit shaft 102c connected to the top of the photovoltaic panel 102a is rotationally limited inside the cabinet 101, and because the bottom of the limiting shaft 102e is limited, the linkage rod 102d can only move upward, so that the photovoltaic panel 102a is lifted to open the equipment, preventing accidental touch by personnel and animals, and effectively protecting the photovoltaic inverter assembly 301.

[0041] When the photovoltaic inverter assembly 301 moves forward, the photovoltaic inverter assembly 301 is transported forward and stabilized by the fixed buffer assembly 201 at the bottom, and the moving card strip 201f is used for limited movement, so that when the photovoltaic panel 102a is fully opened, the photovoltaic inverter assembly 301 is transported out of the cabinet 101 and transported to the operator for operation, so as to prevent the operator from opening and closing the cabinet 101, and also facilitate the operator to check and repair. In the event of an accidental fire inside, the sensor inside the photovoltaic inverter assembly 301 can be used to prevent the operator from opening and closing the cabinet 101. When the temperature detector 301f detects that the internal circuit of the photovoltaic inverter assembly 301 is abnormal and a fire occurs, the photovoltaic inverter assembly 301 controls the fire extinguishing agent box 103b to transport the internal fire extinguishing agent through the delivery pipe 103c to the spray plate 103d to spray the photovoltaic inverter assembly 301 as a whole to extinguish the fire. At the same time, the interior is insulated by the insulation layer 102b so that the flame can only burn inside the cabinet 101. The fire inside the cabinet 101 is extinguished through the spray plate 103d to prevent the fire from spreading and causing influence and harm to the outside.

[0042] Example 2, reference Figure 1 - Figure 5 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the fixed buffer component 201 includes a bottom plate 201a arranged inside the cabinet 101, a buffer rod 201b arranged inside the bottom plate 201a, and a limit block 201c slidably arranged on the outer diameter of the buffer rod 201b, and the limit block 201c is slidably connected to the bottom of the cabinet 101, and the photovoltaic inverter component 301 can be supported by the bottom plate 201a at the bottom of the cabinet 101, and the photovoltaic inverter component 301 can be buffered and fixed when it is impacted by the buffer rod 201b.

[0043] Compared with Example 1, further, a return spring 201d is arranged inside the limiting block 201c, a fixed block 201e is arranged on the top of the return spring 201d, a movable card strip 201f is arranged at the front end of the fixed block 201e, and the movable card strip 201f is connected to the bottom plate 201a. The photovoltaic inverter component 301 can be firmly fixed inside the limiting block 201c through the limiting block 201c, and the return spring 201d at the bottom of the limiting block 201c can be used for buffering from top to bottom and fix the photovoltaic inverter component 301 at the same time. The movable card strip 201f can limit the photovoltaic inverter component 301 when moving.

[0044] During use, when the photovoltaic inverter assembly 301 is installed inside the cabinet 101, the operator places the photovoltaic inverter assembly 301 inside the cabinet 101, and fixes the photovoltaic inverter assembly 301 by inserting the connecting block 301c at the bottom of the photovoltaic inverter assembly 301 into the fixed block 201e. At the same time, the reset spring 201d at the bottom of the fixed block 201e slides inside the limit block 201c, thereby fixing the photovoltaic inverter assembly 301 and buffering the photovoltaic inverter assembly 301. The buffer rod 201b on the outer diameter of the limit block 201c and the fixation of the bottom plate 201a , so that when the cabinet 101 is impacted, the photovoltaic inverter assembly 301 inside can be buffered and balanced, and at the same time, the mobile card strip 201f on the top of the bottom plate 201a can limit and stabilize the movement of the photovoltaic inverter assembly 301 when the fire extinguishing and maintenance assembly 103 pushes the photovoltaic inverter assembly 301. The photovoltaic inverter assembly 301 can be fixed inside the cabinet 101 by the fixed buffer assembly 201, and buffer protection can be provided at the same time, which is also convenient for operators to install and repair the photovoltaic inverter assembly 301, and at the same time, it can prevent livestock, cattle, sheep, etc. from using their bodies to remove itching on the lower end of the inverter or the cable tray with the corner top equipment, which will cause impact.

[0045] The remaining structures are the same as those of Example 1.

[0046] Example 3, reference Figure 1 - Figure 8 , the present invention is based on the first embodiment and the second embodiment and also includes: the photovoltaic inverter assembly 301 includes a connecting block 301c arranged inside the fixing block 201e, a supporting base 301b arranged on the top of the connecting block 301c, and an inverter body 301a arranged on the top of the supporting base 301b, and the photovoltaic inverter assembly 301 can be stably installed inside the cabinet 101 through the connecting block 301c at the bottom of the photovoltaic inverter assembly 301, and the whole is supported by the supporting base 301b.

[0047] Compared with Example 2, further, an inverter module 301e is provided inside the inverter body 301a, and a cabinet door 301d is provided inside the inverter body 301a, and normal operation is performed through the inverter body 301a, and the interior of the inverter body 301a can be inspected and operated through the cabinet door 301d.

[0048] Furthermore, a temperature detector 301f is provided inside the inverter body 301a, and the temperature detector 301f is electrically connected to the fire extinguisher tank 103b. The temperature detector 301f installed inside the inverter body 301a can effectively monitor the internal cables. At the same time, the temperature detector 301f is electrically connected to the fire extinguisher tank 103b, and when an abnormality occurs inside the inverter body 301a, it is processed.

[0049] During use, when the photovoltaic inverter assembly 301 is working normally, the inverter module 301e inside the inverter body 301a performs normal transportation work, and the buzzer alarm of the alarm 105 can also disperse the surrounding animals to prevent the fire from increasing and causing serious losses. The inverter body 301a can also be supported as a whole by the support base 301b, and the operator can inspect and operate the inside of the inverter body 301a through the cabinet door 301d. At the same time, the temperature sensor 301f inside the inverter body 301a monitors the cables on the normally working inverter body 301a. If the cables inside the inverter body 301a are abnormal and a fire occurs, the fire extinguishing agent box 103b is immediately started to spray and extinguish the inverter body 301a as a whole, and the alarm 105 on the top buzzes an alarm, so that the operator can immediately know where the fire occurs and can deal with it quickly.

[0050] The remaining structure is the same as that of Example 2.

[0051] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0052] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An inverter protection device, characterized in that: include, A protection unit (100) comprises a cabinet (101), a switch assembly (102) rotatably arranged on the cabinet (101), a fire extinguishing maintenance assembly (103) arranged on the switch assembly (102), exhaust ports (104) arranged on both sides of the cabinet (101), and an alarm (105) arranged on the top of the cabinet (101); A fixed installation unit (200), comprising a fixed buffer assembly (201) arranged inside the cabinet (101); The photovoltaic unit (300) comprises a photovoltaic inverter assembly (301) arranged on the top of the fixed buffer assembly (201).

2. The inverter protection device according to claim 1, characterized in that: The switch assembly (102) comprises a rotation limit shaft (102c) rotatably arranged inside the cabinet (101), a photovoltaic panel (102a) arranged at one end of the rotation limit shaft (102c), a heat insulation layer (102b) arranged inside the photovoltaic panel (102a), a linkage rod (102d) arranged on both sides of the photovoltaic panel (102a), and a limiting rotation shaft (102e) arranged on the linkage rod (102d), and the limiting rotation shaft (102e) is connected to the fire extinguishing maintenance assembly (103).

3. The inverter protection device according to claim 2, characterized in that: The fire extinguishing maintenance component (103) comprises an electric push rod (103a) arranged inside the cabinet (101), a fire extinguishing agent tank (103b) arranged at the output end of the electric push rod (103a), a delivery pipe (103c) arranged at the top of the fire extinguishing agent tank (103b), and a spray plate (103d) arranged at the other end of the delivery pipe (103c).

4. The inverter protection device according to claim 3, characterized in that: Fixed rods (103e) are provided on both sides of the fire extinguishing agent box (103b), and the tops of the fixed rods (103e) are connected to the spray plates (103d).

5. The inverter protection device according to claim 4, characterized in that: The fixed buffer assembly (201) comprises a bottom plate (201a) arranged inside the cabinet (101), a buffer rod (201b) arranged inside the bottom plate (201a), and a limit block (201c) slidably arranged on the outer diameter of the buffer rod (201b), and the limit block (201c) is slidably connected to the bottom of the cabinet (101).

6. The inverter protection device according to claim 5, characterized in that: A return spring (201d) is arranged inside the limit block (201c), a fixed block (201e) is arranged on the top of the return spring (201d), a movable clamping strip (201f) is arranged at the front end of the fixed block (201e), and the movable clamping strip (201f) is connected to the bottom plate (201a).

7. A photovoltaic inverter, characterized in that: The inverter protection device according to claim 6 comprises: The photovoltaic inverter assembly (301) comprises a connection block (301c) arranged inside the fixing block (201e), a support base (301b) arranged on the top of the connection block (301c), and an inverter body (301a) arranged on the top of the support base (301b).

8. The photovoltaic inverter according to claim 7, characterized in that: An inverter module (301e) is arranged inside the inverter body (301a).

9. The photovoltaic inverter according to claim 8, characterized in that: A cabinet door (301d) is provided inside the inverter body (301a).

10. The photovoltaic inverter according to claim 9, characterized in that: A temperature detector (301f) is arranged inside the inverter body (301a), and the temperature detector (301f) is electrically connected to the fire extinguishing agent tank (103b).

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