Photovoltaic grid-connected inverter convenient for heat dissipation

Abstract

The invention discloses and provides a photovoltaic grid-connected inverter convenient for heat dissipation, which comprises a shell, a top plate is movably connected to the surface of the upper end of the shell, a display screen is fixedly arranged in the center of the top plate, a bottom plate is arranged on the lower end surface of the shell, heat dissipation fins are arranged on the back surface of the bottom plate, and the heat dissipation fins are arranged on the back surface of the bottom plate. The photovoltaic grid-connected inverter comprises a bottom plate, heat dissipation fins are arranged on the back of the bottom plate, baffles are fixed to the left side and the right side of the back of the bottom plate, rectangular grooves are formed in the upper portions and the lower portions of the baffles, and extending parts are arranged at the bottoms of the rectangular grooves. And the transverse extension part can be used for connecting the supporting plate for mounting, so that the structural design is good in heat dissipation effect, simple to disassemble and convenient to fix, and the practicability of the device is integrally improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic inverter grid-connected technology, and in particular to a photovoltaic grid-connected inverter which is convenient for heat dissipation. Background Art

[0002] Photovoltaic inverter, also known as solar inverter, is one of the key components in solar photovoltaic system. Its function is to convert the direct current generated by solar panels into alternating current for use in power grid or household appliances. Photovoltaic inverter is one of the important system balances in photovoltaic array system and can be used with general AC power supply equipment. Solar inverter has special functions for photovoltaic array, such as maximum power point tracking and islanding effect protection. Photovoltaic inverter not only has direct-to-ac conversion function, but also has the function of maximizing the performance of solar cells and system fault protection. In summary, it has automatic operation and shutdown function, maximum power tracking control function, anti-single operation function (for grid-connected system), automatic voltage adjustment function (for grid-connected system), DC detection function (for grid-connected system), DC grounding detection function (for grid-connected system).

[0003] Most of the direct output of solar energy is 12VDC, 24VDC, and 48VDC. The effective conversion of the DC power generated by the system into AC power should be realized, so as to provide enough power for 220VAC appliances. Therefore, the DC-AC inverter is mainly selected. The main function of the inverter is to realize the effective conversion of DC power into AC power. Both solar cells and batteries are DC power sources. Therefore, once the load contains AC power, the inverter becomes an indispensable part. According to statistics, the reliability of electronic components decreases by 10% for every 2℃ increase in temperature. When the temperature rises to 50℃, the life span is only 1 / 6 of that at 25℃. Therefore, the electronic components must be effectively cooled to ensure the reliable operation of the devices. The heat dissipation problem is becoming an important factor affecting the development of electronic technology. For photovoltaic grid-connected inverters, due to their small single-unit power, natural air cooling is usually used. The heat sink is directly used on the power device of the equipment. Relying on the principle of hot air rising and cold air falling, the effective heat dissipation of the heat sink can be guaranteed.

[0004] After patent search, the Chinese invention patent with authorization number CN116073187B discloses a photovoltaic grid-connected inverter, including a main body, a protective component and a clamping component. A support frame is installed at the bottom end of the main body, and a connector is also connected to the main body. This photovoltaic grid-connected inverter is provided with a clamping component, and then under normal use, the protective cover is closed. At this time, the wind wheel is driven to rotate by the motor, so the wind generated by the rotating wind wheel blows to the rotating tube and then blows to the connecting tube and the connecting tube through the rotating tube, so it enters the airbag to expand the airbag, and then the expanded airbag squeezes the connecting wire, thereby clamping the connecting wire, relieving the pressure of the gravity of the connecting wire, thereby avoiding the loosening of the connecting wire due to gravity after the connecting wire falls. However, the structure of the patent is complex and the heat dissipation effect is poor, resulting in a substantial increase in the device structure and cost. Taking into account the compactness and heat dissipation effect of the assembly structure is the key point in the technical solution. Summary of the invention

[0005] The present invention provides a photovoltaic grid-connected inverter which is convenient for heat dissipation, so as to solve the technical problem that the assembly structure of the conventional photovoltaic grid-connected inverter in the prior art is difficult to achieve both compactness and heat dissipation effect.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A photovoltaic grid-connected inverter that is easy to dissipate heat, comprising a shell, a top plate movably connected to the surface at the upper end of the shell, a display screen fixedly arranged at the center of the top plate, a bottom plate fixedly connected to the lower end of the shell, a plurality of heat dissipation fins arranged on the back of the bottom plate, baffles arranged on both sides of the heat dissipation fins on the left and right sides of the back of the bottom plate, rectangular grooves are opened above and below the baffles, an extension is arranged at the bottom of the rectangular groove, a strip hole is opened on the bottom plate, a buckle cover is fixedly connected to the lower end of the bottom plate, and the buckle cover is located on the lower side of the strip hole.

[0008] In a possible implementation, an annular fixing plate is fixedly connected to the lower edge of the shell, located on the upper side of the bottom plate, a circuit board is fixedly connected to the upper end of the annular fixing plate, and an AC interface assembly is arranged on the rear end surface of the shell.

[0009] In one possible implementation, the AC interface assembly includes a photovoltaic input interface, a mains power interface, a control button, a first AC load interface, a second AC load interface, and a data line interface, wherein the control button is located at the leftmost side of the rear end surface of the shell, the photovoltaic input interface and the mains power interface are both located at the right end of the control button, the photovoltaic input interface is located above the mains power interface, the first AC load interface is located at the right end of the photovoltaic input interface and the mains power interface, the second AC load interface is located at the right end of the first AC load interface, and the data line interface is located at the right end of the second AC load interface, and is at the rightmost side of the rear end surface of the shell.

[0010] In a possible implementation, a fixing frame is fixedly connected to the front end of the top plate, a fixing frame is fixedly connected above the top plate, a square hole is opened on the fixing frame, and a blocking piece made of acrylic material is arranged on the square hole.

[0011] In a possible implementation, the heat dissipation fins are divided into two groups, one group is located on the left side of the strip hole, and the other group is located on the right side of the strip hole. Each group of heat dissipation fins is longitudinally equidistantly distributed on the base plate and is perpendicular to the base plate.

[0012] In a possible implementation manner, the number of the photovoltaic input interfaces is two, the number of the mains interfaces is two, and the photovoltaic input interfaces and the mains interfaces are aligned with each other.

[0013] In a possible implementation, screw holes are opened around the strip-shaped hole, and the buckle cover is fixed to the base plate by positioning bolts.

[0014] In a possible implementation, a heat dissipation fan is disposed inside the shell, a heat dissipation port is opened on the shell, and the top plate and the bottom plate are both made of aluminum alloy.

[0015] In a possible implementation, slide rails are respectively provided on the left and right sides of the square hole of the fixing frame, and the baffle slides up and down on the fixing frame through the slide rails, and the two sides of the baffle are respectively slidably matched with the slide rails.

[0016] In a possible implementation manner, the baffle is clamped with a support plate, and the support plate is used to install the inverter.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention provides a photovoltaic grid-connected inverter that is easy to dissipate heat. By arranging heat dissipation fins on the bottom plate of the photovoltaic grid-connected inverter, the heat dissipation fins are made of metal material and can ensure the heat dissipation effect with a large heat dissipation area. The strip holes can serve as internal and external connections. When the heat dissipation pressure is large, the buckle cover can be opened. When it is not necessary to open, the buckle cover can be used to close the strip holes. When the heat dissipation demand is not large, the buckle cover can close the strip holes to reduce the intrusion of dust and moisture and protect internal components. The structure takes into account both heat dissipation efficiency and equipment protection, and is practical. The buckle cover is integrally connected to the positioning bolts to prevent the risk of the buckle cover being lost during disassembly.

[0019] 2. The present invention provides a photovoltaic grid-connected inverter that is easy to dissipate heat. A square hole is opened on the fixing frame. Slide rails are arranged on the left and right sides of the square hole of the fixing frame for installing a baffle. The baffle can slide up and down on the slide rail so that the baffle can be opened when the field of vision is unclear and the content on the display screen can be observed intuitively. The sliding cooperation between the slide rail and the baffle ensures the smooth movement of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a forward structural schematic diagram of the present invention;

[0021] Figure 2 is a schematic diagram of the bottom AC interface assembly of the present invention;

[0022] Figure 3 It is a schematic diagram of the back side of the bottom plate of the present invention;

[0023] Figure 4 It is a schematic diagram of the position of the strip-shaped holes in the present invention;

[0024] Figure 5 It is a schematic diagram of the structure after the bottom plate is removed in the present invention;

[0025] Figure 6 It is a schematic diagram of the connection of the support plate in the present invention;

[0026] Figure 7 It is a schematic diagram of the installation of the fixing frame of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the buckle cover of the present invention;

[0028] Fig. 9 It is a connection schematic diagram of the baffle of the present invention.

[0029] In the figure, 1, shell; 2, top plate; 3, display screen; 4, bottom plate; 5, heat dissipation fins; 6, strip holes; 7, baffle; 8, rectangular grooves; 9, extension; 10, buckle cover; 11, annular fixing plate; 12, circuit board; 13, photovoltaic input interface; 14, AC power interface; 15, control button; 16, first AC load interface; 17, second AC load interface; 18, data line interface; 19, fixing bracket; 20, square hole; 21, baffle; 22, support plate. DETAILED DESCRIPTION

[0030] The embodiment of the present invention provides a photovoltaic grid-connected inverter that is convenient for heat dissipation, which is used to improve the efficiency and heat dissipation capacity of a photovoltaic power generation system.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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 work should fall within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figures 1 to 9 , an embodiment of the present invention comprises:

[0034] A photovoltaic grid-connected inverter for facilitating heat dissipation comprises a shell 1, a top plate 2 is movably connected to the surface at the upper end of the shell 1, a display screen 3 is fixedly arranged at the center of the top plate 2, a bottom plate 4 is fixedly connected to the lower end of the shell 1, a plurality of heat dissipation fins 5 are arranged on the back of the bottom plate 4, baffles 7 are arranged on both sides of the heat dissipation fins 5 on the left and right sides of the back of the bottom plate 4, rectangular grooves 8 are opened above and below the baffles 7, and an extension portion 9 is arranged at the bottom of the rectangular groove 8.

[0035] In this embodiment, the shell 1 is the peripheral structure of the inverter, which plays the role of bearing, containing and protecting. The top plate 2 is located at the upper end of the shell 2, and a display screen 3 is provided in the center for displaying the working status and parameters of the inverter. The bottom plate 4 is fixed to the lower end of the shell 1, and heat dissipation fins 5 are installed on the back to improve the heat dissipation efficiency. The baffle 7 is arranged on the left and right sides of the bottom plate 4, located on both sides of the heat dissipation fins 5. A rectangular groove 8 and an extension 9 are opened on the baffle 7. The baffle 7 is clamped with a support plate 22 through the rectangular groove 8 and the extension 9. The edge of the support plate 22 fits perfectly with the rectangular groove 8 and the extension 9. The support plate 22 is provided with screw holes and can be fixed in a suitable position (on a wall or a column) by screws. The support plate 22 ensures the stability of the inverter installation, while also protecting the heat dissipation fins 5 and reducing the wear of the inverter during use.

[0036] See also Figure 3 A strip hole 6 is opened on the bottom plate 4 , and a buckle cover 10 is fixedly connected to the rear end of the bottom plate 4 , and the buckle cover 10 is located at the rear side of the strip hole 6 .

[0037] In this embodiment, a strip hole 6 is opened on the bottom plate, and a buckle cover 10 is fixed at the rear end. The buckle cover 10 is located on the rear side of the strip hole 6. The design of the strip hole 6 increases the surface area of ​​the heat dissipation fins, and also promotes air circulation to help heat dissipation. When the heat dissipation demand is large, the buckle cover 10 can be opened to increase air circulation and improve the heat dissipation effect; when the heat dissipation demand is not large, the buckle cover 10 can close the strip hole 6 to reduce the intrusion of dust and moisture. Different methods of heat dissipation are selected according to the usage situation, which enriches the use scenarios of the inverter and extends the service life of the inverter.

[0038] See also Figure 2 The AC interface component includes a photovoltaic input interface 13, a mains interface 14, a control button 15, a first AC load interface 16, a second AC load interface 17, and a data line interface 18. The control button 15 is located at the leftmost side of the rear end surface of the shell 1, the photovoltaic input interface 13 and the mains interface 14 are located at the right end of the control button 15, the photovoltaic input interface 13 is located above and parallel to the mains interface 14, the first AC load interface 16 is located at the right end of the photovoltaic input interface 13 and the mains interface 14, the second AC load interface 17 is located at the right end of the first AC load interface 16, and the data line interface 18 is located at the right end of the second AC load interface 17, and is at the rightmost side of the rear bottom end surface of the shell 1.

[0039] In this embodiment, the control button 15 is located on the leftmost side of the bottom surface of the shell 1 and is used to switch the device on or off or control the device. The photovoltaic input interface 13 and the mains interface 14 are located on the right end of the control button 15. The photovoltaic input interface is located above and parallel to the mains interface, which means that the two power sources can be connected at the same time. The photovoltaic input interface 13 is used to connect the solar photovoltaic panel, and the mains interface 14 is used to connect the adjusted AC power to the power grid for user use, thereby outputting the converted AC power to the mains system. The control button 15 is used to perform basic control operations; the first AC load interface 16 and the second AC load interface 17 are used to connect electrical appliances to provide off-grid power supply in a limited range; the data line interface 18 is used to connect the data line to periodically output device data.

[0040] Example 2

[0041] See also Figure 7A fixing frame 19 is fixedly connected above the top plate 2, a square hole 20 is opened on the fixing frame 19, and an acrylic baffle 21 is arranged on the square hole 20. The fixing frame 19 and the square hole 20 are designed to protect the display screen 3 on the top plate 2, and the acrylic baffle plays a protective role without blocking the content displayed on the display screen 3.

[0042] See also Fig. 9 A square hole 20 is provided on the fixed frame 19 with slide rails on the left and right sides respectively. The baffle 21 slides up and down on the fixed frame through the slide rails. The two sides of the baffle 21 are respectively slidably matched with the slide rails. The baffle 21 can slide, which is convenient for opening the baffle 21 in special circumstances such as fog in winter to observe the content on the display screen 3.

[0043] See also Figure 3 , Figure 4 and Figure 6 The heat dissipation fins 5 are divided into two groups, one group is located on the left side of the strip hole 6, and the other group is located on the right side of the strip hole 6. Each group of heat dissipation fins 5 is longitudinally equidistantly distributed on the bottom plate 4 and is perpendicular to the bottom plate 4.

[0044] In this embodiment, the heat dissipation fins 5 are made of metal, such as aluminum or copper. Due to their high thermal conductivity, they can quickly conduct heat from the inside of the inverter to the outside. One group is located on the left side of the strip hole 6, and the other group is located on the right side of the strip hole 6. Each group of heat dissipation fins 5 are distributed on the bottom plate 4 at equal intervals in the longitudinal direction and are perpendicular to the bottom plate 4. This layout helps to improve the heat dissipation efficiency of the photovoltaic grid-connected inverter.

[0045] Specifically, there are two photovoltaic input interfaces 13 and two mains interfaces 14 . The photovoltaic input interfaces 13 and the mains interfaces 14 are aligned with each other, and the two photovoltaic input interfaces 13 and the two mains interfaces 14 are aligned with each other, which is convenient for installation and connection.

[0046] See also Figure 4 and Figure 8 In this embodiment, screw holes are opened around the strip hole 6, and the buckle cover 10 is fixed to the base plate 4 by positioning bolts. This design facilitates the installation, maintenance and disassembly of the buckle cover 10. The positioning bolts of the buckle cover 10 are connected to the buckle cover 10 in an integrated manner. When installing, align the positioning bolts with the screw holes around the strip hole 6 and tighten the bolts. When disassembling, loosen the positioning bolts. Due to the integrated connection method, the positioning bolts will not fall off, and the inconvenience caused by the loss of the bolts after the buckle cover 10 is disassembled can be prevented.

[0047] Specifically, a cooling fan is provided inside the shell 1, and cooling ports are provided on the two baffles 7. This design shows that in addition to the cooling fins 5, the photovoltaic grid-connected inverter also has a special cooling fan to ensure the temperature control of the photovoltaic inverter during operation, improve the heat dissipation efficiency of the inverter, and effectively dissipate the heat generated by the components in the shell 1. The top plate 2 and the bottom plate 4 are both made of aluminum alloy. Aluminum alloy is widely used in the construction of electronic equipment due to its light weight and good heat dissipation performance. The top plate 2 and the bottom plate 4 of the photovoltaic grid-connected inverter are made of aluminum alloy, which can not only reduce its own weight but also improve the heat dissipation effect.

[0048] The photovoltaic grid-connected inverter provided by the present invention is designed to improve the heat dissipation capacity of the photovoltaic grid-connected inverter, ensuring that the equipment will not suffer performance degradation or shortened life due to excessive temperature while operating efficiently. At the same time, the structure is compact and not only simple in structure, but also easy to load and unload.

[0049] The above description is only a preferred embodiment of the present invention, and the parts not described in detail are all prior art. Any technician familiar with this profession, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A photovoltaic grid-connected inverter that facilitates heat dissipation, comprising a housing (1), characterized in that: A top plate (2) is movably connected to the surface at the upper end of the shell (1), a display screen (3) is fixedly arranged at the center of the top plate (2), a bottom plate (4) is fixedly connected to the lower end of the shell (1), a plurality of heat dissipation fins (5) are arranged on the back of the bottom plate (4), baffles (7) are arranged on both sides of the heat dissipation fins (5) on the left and right sides of the back of the bottom plate (4), rectangular grooves (8) are arranged on the upper and lower sides of the baffles (7), an extension portion (9) is arranged at the bottom of the rectangular groove (8), a strip hole (6) is arranged on the bottom plate (4), a buckle cover (10) is fixedly connected to the lower end of the bottom plate (4), and the buckle cover (10) is located on the lower side of the strip hole (6).

2. A photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 1, characterized in that: An annular fixing plate (11) is fixedly connected to the lower edge of the shell (1) and located in front of the bottom plate (4), a circuit board (12) is fixedly connected to the upper end of the annular fixing plate (11), and an AC interface component is arranged on the rear end surface of the shell (1).

3. A photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 2, characterized in that: The AC interface assembly comprises a photovoltaic input interface (13), a mains interface (14), a control button (15), a first AC load interface (16), a second AC load interface (17), and a data line interface (18); the control button (15) is located at the leftmost side of the rear end surface of the housing (1); the photovoltaic input interface (13) and the mains interface (14) are both located at the right end of the control button (15); the photovoltaic input interface (13) is located above the mains interface (14); the first AC load interface (16) is located at the right end of the photovoltaic input interface (13) and the mains interface (14); the second AC load interface (17) is located at the right end of the first AC load interface (16); and the data line interface (18) is located at the right end of the second AC load interface (17), and is located at the rightmost side of the rear end surface of the housing (1).

4. The photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 1, characterized in that: A fixing frame (19) is fixedly connected above the top plate (2), a square hole (20) is provided on the fixing frame (19), and a baffle (21) made of acrylic material is arranged on the square hole (20).

5. The photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 1, characterized in that: The heat dissipation fins (5) are divided into two groups, one group is located on the left side of the strip hole (6), and the other group is located on the right side of the strip hole (6). Each group of heat dissipation fins (5) is longitudinally equidistantly distributed on the bottom plate (4) and is perpendicular to the bottom plate (4).

6. The photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 3, characterized in that: The number of the photovoltaic input interfaces (13) is two, the number of the mains interfaces (14) is two, and the photovoltaic input interfaces (13) and the mains interfaces (14) are aligned with each other.

7. The photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 1, characterized in that: Screw holes are provided around the strip-shaped hole (6), and the buckle cover (10) is fixed on the bottom plate (4) by means of positioning bolts.

8. The photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 1, characterized in that: A heat dissipation fan is arranged inside the shell (1), a heat dissipation port is opened on the shell (1), and the top plate (2) and the bottom plate (4) are both made of aluminum alloy.

9. The photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 4, characterized in that: Slide rails are respectively arranged on the left and right sides of the square hole (20) of the fixing frame (19), and the blocking piece (21) slides up and down on the fixing frame via the slide rails, and the two sides of the blocking piece (21) are respectively slidably matched with the slide rails.

10. The photovoltaic grid-connected inverter for facilitating heat dissipation according to claim 1, characterized in that: The baffle (7) is clamped with a support plate (22), and the support plate (22) is used for installing an inverter.

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